KR20250109036A - Height Adjustment Device - Google Patents

Abstract

A height adjustment device is disclosed. The height adjustment device is applied to a baby stroller, a device for pushing a pet, or a device for transporting cargo, and since the height of the upper part can be adjusted, it makes it easy to get on and off infants, pets, cargo, etc. that can be carried on the upper part.
A height adjustment device according to an embodiment of the present invention includes an upper plate, a lower plate, a handle plate, a plurality of handle support plates, a plurality of upper plate support plates, and a driving plate. By driving the driving plate, the upper plate is spaced apart from the lower plate by a preset distance or is arranged adjacent to the lower plate.

Description

Height Adjustment Device

The present invention relates to a height adjusting device.

Baby strollers, devices for carrying and pushing pets, or devices for transporting cargo, etc., allow infants, pets, and cargo to be loaded and unloaded.

Publication No. 10-2171790 discloses a height adjustment device for a desk. Since the invention does not use power, when the height adjustment device is applied to boarding and disembarking infants, pets, and cargo, the user may have difficulty using and operating it.

Accordingly, a height-adjusting device that is easy to carry and allows easy boarding and disembarkation of infants, pets, and cargo is required.

Korean Patent Registration No. 10-2171790 (Announcement Date: 2020.10.29)

The purpose of the present invention is to provide a height-adjusting device that can easily accommodate infants, pets, cargo, etc., and is easy to carry.

The above-described object of the present invention is achieved by the specific contents described below.

According to an embodiment of the present invention, a height adjustment device includes an upper plate, a lower plate, a handle plate, a plurality of handle support plates, a plurality of upper plate support plates, and a driving plate. The lower plate is disposed below the upper plate. One end of the handle plate is movably connected to one side of the upper plate, and the other end is movably connected to the other side of the upper plate. The plurality of handle support plates are rotatably connected to the upper plate and the handle plate. The plurality of upper plate support plates connect the upper plate and the lower plate. The driving plate is disposed on the lower plate. Then, by driving the driving plate, the upper plate is spaced apart from the lower plate by a preset distance or disposed adjacent to the lower plate.

Specifically, a first upper plate moving groove is formed on one side of the upper plate, and a second upper plate moving groove is formed on the other side of the upper plate.

Specifically, a first lower plate moving groove is formed on one side of the lower plate, and a second lower plate moving groove is formed on the other side of the lower plate.

Specifically, the plurality of handle supports include a first handle support and a second handle support. One end of the first handle support is rotatably connected to a first position of the handle portion, and the other end of the first handle support is rotatably connected to one side of the upper plate. One end of the second handle support is rotatably connected to a second position of the handle portion, and the other end of the second handle support is rotatably connected to the other side of the upper plate.

Specifically, the plurality of upper plate supports include a first upper plate support, a second upper plate support, a third upper plate support, and a fourth upper plate support. The first upper plate support and the second upper plate support are connected to each other so as to be rotatably connected to each other, and the third upper plate support and the fourth upper plate support are connected to each other so as to be rotatably connected to each other.

Specifically, one end of the first upper plate support is rotatably connected to one end of the handle portion, and the other end of the first upper plate support is rotatably connected to the driving portion. One end of the third upper plate support is rotatably connected to the other end of the handle portion, and the other end of the third upper plate support is rotatably connected to the driving portion.

Specifically, a first upper plate moving pin is arranged in a groove formed in one end of the first upper plate support portion and a hole formed in one end of the handle portion. A second upper plate moving pin is arranged in a groove formed in one end of the third upper plate support portion and a hole formed in the other end of the handle portion.

Specifically, one end of the first upper plate moving pin can slide in the longitudinal direction of the first upper plate moving groove while being arranged in the first upper plate moving groove. One end of the second upper plate moving pin can slide in the longitudinal direction of the second upper plate moving groove while being arranged in the second upper plate moving groove.

Specifically, the driving unit includes a first driving unit and a second driving unit. The first driving unit is disposed in a first motor receiving unit formed on one side of the lower plate. The second driving unit is disposed in a second motor receiving unit formed on the other side of the lower plate.

Specifically, the other end of the first upper plate support member is connected to the rotational shaft of the first driving unit and rotates by driving of the first driving unit. The other end of the third upper plate support member is connected to the rotational shaft of the second driving unit and rotates by driving of the second driving unit.

Specifically, one end of the second upper plate support is rotatably connected to the other end of the first handle support, and the other end of the second upper plate support is rotatably connected to the lower plate. One end of the fourth upper plate support is rotatably connected to the other end of the second handle support, and the other end of the fourth upper plate support is rotatably connected to the lower plate.

Specifically, a first lower plate moving pin is arranged in a groove formed in the other end of the second upper plate support member. A second lower plate moving pin is arranged in a groove formed in the other end of the fourth upper plate support member.

Specifically, one end of the first lower plate moving pin can slide in the longitudinal direction of the first lower plate moving groove while being arranged in the first lower plate moving groove. One end of the second lower plate moving pin can slide in the longitudinal direction of the second lower plate moving groove while being arranged in the second lower plate moving groove.

Specifically, a height adjustment device according to an example of an embodiment of the present invention includes a plurality of wheels. The plurality of wheels are rotatably connected to a lower part, and the plurality of wheels are rotatable by driving of the driving part.

The height adjustment device according to an example of the embodiment of the present invention has an effect that can be applied to a baby stroller, a device for pushing a pet, or a device for transporting cargo.

In addition, since the height adjustment device according to the embodiment of the present invention can adjust the height of the upper part, it has the effect of making it easy to get on and off infants, pets, cargo, etc. that can be carried on the upper part.

In addition, since the height adjustment device according to the embodiment of the present invention uses a driving unit (power), it has the effect of being convenient for the user to use and operate.

In addition, the height adjustment device according to the embodiment of the present invention has the effect of being easy to carry because its size can be reduced.

More detailed effects of the height adjustment device of the present invention are described in the specific contents for carrying out the invention below.

Figure 1 illustrates a state in which a height adjustment device is unfolded according to an example of an embodiment of the present invention.
Figure 2 shows the height adjustment device illustrated in Figure 1 in a folded state.
Figure 3 is a perspective view showing the upper part of Figure 1.
Figure 4 is a plan view showing the upper part of Figure 3.
Figure 5 is a perspective view showing the lower part of Figure 1.
Figure 6 is a plan view showing the lower part of Figure 5.
Figure 7 is a right side view of the height adjustment device illustrated in Figure 1.
Fig. 8 is a perspective view of the height adjustment device illustrated in Fig. 1 as viewed from the rear side.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings. In order not to obscure the gist of the present invention, a detailed description of components of the present invention that can be clearly understood and easily reproduced by a person skilled in the art using conventional techniques will be omitted.

The attached drawings are only provided to facilitate understanding of examples of embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In addition, terms including ordinal numbers such as first, second, etc. used in this specification may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

Below, a height adjustment device according to an example of an embodiment of the present invention is described.

A height adjustment device according to an example of an embodiment of the present invention is applied to a baby stroller, a device for pushing a pet, or a device for transporting cargo.

A height adjustment device according to an example of an embodiment of the present invention can adjust the height of the upper part described below.

The height adjustment device according to an example of an embodiment of the present invention can adjust the height of the upper part, thereby making it easy for infants, pets, cargo, etc., that can be carried on the upper part to get on and off.

The height adjustment function of the upper part of the height adjustment device according to an example of an embodiment of the present invention can be expressed as the upper part and the lower part automatically unfolding and folding.

Referring to FIGS. 1 to 8, the height adjustment device of the present invention includes an upper plate (1), a lower plate (2), a handle (3), a handle support (4), a plurality of upper plate support parts (5), a driving part (6), and a wheel (7).

The upper part (1) is formed into a plate shape having preset horizontal length, vertical length, and thickness (see Fig. 1, Fig. 3, and Fig. 4).

The upper part (1) is placed on top of the lower part (2).

The upper part (1) includes one side (11) and the other side (12).

One side (11) of the upper plate (1) represents a surface formed in the thickness direction of the upper plate (1). The other side (12) of the upper plate (1) represents a surface formed in the thickness direction of the upper plate (1) and is a surface facing the opposite side to the one side (11) of the upper plate (1). The thickness direction represents the up-down direction in Fig. 1.

The upper part (1) includes a upper part moving home part (111, 121).

The top plate moving home portions (111, 121) are formed on one side (11) and the other side (12) of the top plate portion (1), respectively.

The top plate moving groove (111, 121) is a groove formed with a preset length along the longitudinal direction of one side (11) and the other side (12) of the top plate (1). The longitudinal direction is indicated in the front-back direction in Fig. 1.

The upper plate moving groove (111) (first upper plate moving groove (111)) formed on one side (11) of the upper plate (1) may be formed, for example, such that among the upper side, lower side, left side, and right side, the upper side, lower side, and left side are surrounded by the upper plate (1) and only the right side is open, or the upper side and left side are surrounded by the upper plate (1) and only the right side and lower side are open.

And, the upper plate moving groove (121) (second upper plate moving groove (121)) formed on the other side (12) of the upper plate (1) may be formed, for example, among the upper side, lower side, left side, and right side, the upper side, lower side, and right side may be surrounded by the upper plate (1) and only the left side may be open, or the upper side and right side may be surrounded by the upper plate (1) and only the left side and lower side may be open.

The top plate moving home portion (111, 121) is formed with a preset length at a position (front side) opposite to the position (rear side) where the handle support portion (4) is arranged among one side (11) and the other side (12) of the top plate portion (1).

A first upper plate moving pin (513) described later is arranged in the first upper plate moving home portion (111). The first upper plate moving pin (513) can move along the longitudinal direction of the first upper plate moving home portion (111) in the first upper plate moving home portion (111).

In addition, a second upper plate moving pin (533) described later is arranged in the second upper plate moving home portion (121). The second upper plate moving pin (533) can move along the longitudinal direction of the second upper plate moving home portion (121) in the second upper plate moving home portion (121).

The lower part (2) is formed into a plate shape with preset horizontal length, vertical length, and thickness (see Fig. 1, Fig. 5, and Fig. 6).

The lower part (2) is placed below the upper part (1).

The lower part (2) includes one side (21) and the other side (22).

One side (21) of the lower plate (2) represents a surface formed in the thickness direction of the lower plate (2). The other side (22) of the lower plate (2) represents a surface formed in the thickness direction of the lower plate (2) and is a surface facing the opposite side of the one side of the lower plate (2). The thickness direction represents the up-down direction in Fig. 1.

One side (21) of the lower part (2) faces the same side as one side (11) of the upper part (1), and the other side (22) of the lower part (2) faces the same side as the other side (12) of the upper part (1).

The lower plate (2) includes a lower plate moving home portion (211, 221).

The lower plate moving home portions (211, 221) are formed on one side (21) and the other side (22) of the lower plate portion (2), respectively.

The lower plate moving groove (211, 221) is a groove formed with a preset length along the longitudinal direction of one side (21) and the other side (22) of the lower plate (2). The longitudinal direction is indicated in the front-back direction in Fig. 1.

The lower plate moving groove (211) (first lower plate moving groove (211)) formed on one side (21) of the lower plate (2) may be formed, for example, such that among the upper side, lower side, left side, and right side, the upper side, lower side, and left side are surrounded by the lower plate (2) and only the right side is open, or the upper side and left side are surrounded by the lower plate (2) and only the right side and lower side are open.

And, the lower plate moving groove (221) (second lower plate moving groove (221)) formed on the other side (22) of the lower plate (2) may be formed, for example, such that among the upper side, lower side, left side, and right side, the upper side, lower side, and right side are surrounded by the lower plate (2) and only the left side is open, or the upper side and right side are surrounded by the lower plate (2) and only the left side and lower side are open.

The lower plate moving home portion (211, 221) is formed with a preset length adjacent to the position (front side) where the front wheel (71) is placed among one side (21) and the other side (22) of the lower plate portion (2).

A first lower plate moving pin (523), which will be described later, is arranged in the first lower plate moving home portion (211). The first lower plate moving pin (523) can move along the longitudinal direction of the first lower plate moving home portion (211) in the first lower plate moving home portion (211).

In addition, a second lower plate moving pin (543) described later is arranged in the second lower plate moving home portion (221). The second lower plate moving pin (543) can move along the longitudinal direction of the second lower plate moving home portion (221) in the second lower plate moving home portion (221).

The lower part (2) includes a motor receiving part (212, 222) (see Fig. 8).

The motor receiving portions (212, 222) are formed on one side (21) and the other side (22) of the lower portion (2), respectively.

The motor receiving portion (212, 222) is formed at the location where the rear wheel (72) is placed on one side (21) and the other side (22) of the lower plate (2). That is, the motor receiving portion (212, 222) is formed on the rear side of one side (21) and the other side (22) of the lower plate (2).

The motor receiving portion (212, 222) includes a first motor receiving portion (212) formed on the rear side of one side (21) of the lower plate (2) and a second motor receiving portion (222) formed on the rear side of the other side (22) of the lower plate (2).

The motor housing (212, 222) accommodates the driving unit (6).

The motor receiving portion (212, 222) is formed in a groove shape. However, the motor receiving portion (212, 222) is not limited to a groove shape and can be formed in various shapes as long as it has a shape in which the driving portion (6) is received.

The first motor receiving unit (212) receives the first driving unit (61) described later, and the second motor receiving unit (222) receives the second driving unit (62) described later.

The motor receiving portion (212, 222) may further include other components that allow the driving portion (6) to be received.

A wheel (7) is placed (connected) to the lower part (2). The wheel (7) can rotate while connected to the lower part (2).

A plurality of wheels (7) are provided.

Among the multiple wheels (7), two front wheels (71) are rotatably positioned on the front side of one side (21) and the front side of the other side (22) of the lower plate (2). The method by which the two front wheels (711, 712) are rotatably connected to the lower plate (2) is based on conventional technology.

Among the multiple wheels (7), two rear wheels (72) are rotatably positioned on the rear side of one side (21) and the rear side of the other side (22) of the lower part (2).

According to an example of one embodiment of the present invention, each of the two rear wheels (721, 722) is coupled to a rotation shaft (611, 621) of a driving unit (6) arranged on the lower part (2) (see Fig. 8). By driving the driving unit (6), the two rear wheels (721, 722) can rotate.

Alternatively, according to another embodiment of the present invention, the two rear wheels (721, 722) may be rotatably connected to the lower part (2) in the same manner as the two front wheels (711, 712) are rotatably connected to the lower part (2) by conventional techniques, without being coupled to the rotational axis (611, 621) of the driving part (6).

The handle part (3) is formed in a rod shape having two or more bent parts (33). The handle part (3) illustrated in Fig. 1 has two bent parts (33) formed therein. Alternatively, as illustrated in Fig. 7, the bent part (33) of the handle part (3) may also be formed between one end (31) (or the other end (32)) and the middle portion of the handle part (3).

The handle part (3) can be formed by having a single rod shape that is long in one direction and has two or more bent parts (33). However, the handle part (3) is not limited to this, and can be formed by having multiple rod shapes connected and having two or more bent parts (33).

The handle part (3) includes one end (31) and the other end (32). The one end (31) and the other end (32) represent ends positioned at opposite positions. The user can hold the middle part located between the one end (31) and the other end (32) of the handle part (3) with his/her hand.

One end (31) of the handle portion (3) is movably connected to one side (11) of the top plate portion (1). Specifically, one end (31) of the handle portion (3) is movably connected to the first top plate moving groove portion (111) of the top plate portion (1) by the first top plate moving pin (513) described later (via the first top plate moving pin (513)).

And, the other end (32) of the handle part (3) is movably connected to the other side (12) of the top plate part (1). Specifically, the other end (32) of the handle part (3) is movably connected to the second top plate moving groove part (121) of the top plate part (1) by the second top plate moving pin (533) described later (via the second top plate moving pin (533)).

The handle support member (4) is formed in a rod shape with a preset length. The handle support member (4) may be formed in a straight shape or may have one or more bent portions.

The handle support part (4) supports the handle part (3).

A plurality of handle supports (4) are provided.

The handle support part (4) is rotatably connected to the top part (1) and the handle part (3).

The plurality of handle supports (4) include a first handle support (41) and a second handle support (42).

Each of the first handle support member (41) and the second handle support member (42) is connected to the handle member (3) and the top plate member (1).

Each of the first handle support (41) and the second handle support (42) includes one end (411, 421) and the other end (412, 422). The one end (411, 421) and the other end (412, 422) represent ends positioned at opposite positions.

One end (411) of the first handle support member (41) is rotatably connected to the first position (311) of the handle member (3), and the other end (412) of the first handle support member (41) is rotatably connected to one side (11) of the upper plate member (1).

The first position (311) of the handle part (3) indicates a position spaced apart from one end (31) of the handle part (3) by a preset distance in the direction toward the middle part of the handle part (3).

The structure in which one end (411) of the first handle support member (41) and the first position (311) of the handle member (3) are rotatably connected is explained as follows, for example.

A groove (not indicated) is formed in the longitudinal direction of the first handle support portion (41) at one end (411) of the first handle support portion (41). The first position (311) of the handle portion (3) is inserted into the groove. Then, a connecting pin (first connecting pin (431)) (see FIG. 7) is arranged to penetrate the one end (411) of the first handle support portion (41) and the first position (311) of the handle portion (3).

One end (411) of the first handle support member (41) and the first position (311) of the handle member (3) can rotate relative to each other with the first connecting pin (431) as the rotation axis.

The first connecting pin (431) is formed in a rod (or bar) shape with a preset length. The first connecting pin (431) may be a screw or a rivet.

A through hole in which a first connecting pin (431) is placed is formed at each of one end (411) of the first handle support member (41) and the first position (311) of the handle member (3).

Each of one end (411) of the first handle support member (41) and the first position (311) of the handle member (3) can rotate around the first connecting pin (431) as a rotation axis.

According to an example of one embodiment of the present invention, a bearing (first bearing) is arranged in a through hole formed in one end (411) of the first handle support portion (41), and a first connecting pin (431) is arranged in a center hole of the first bearing. By the first bearing, one end (411) of the first handle support portion (41) and the first position (311) of the handle portion (3) can easily rotate relative to each other. The bearing is not illustrated in this specification. The bearing represents a well-known bearing.

The structure in which the other end (412) of the first handle support member (41) and one side (11) of the upper plate member (1) are rotatably connected is explained as follows.

A connecting pin (second connecting pin (432)) (see Fig. 7) is positioned to penetrate the other end (412) of the first handle support member (41). Then, the end of the second connecting pin (432) is inserted into and fixed to one side (11) of the upper plate member (1).

The other end (412) of the first handle support member (41) can rotate around the second connecting pin (432) as a rotation axis.

The second connecting pin (432) is formed in a rod (or bar) shape with a preset length. The second connecting pin (432) may be a screw or a rivet.

A through hole in which a second connecting pin (432) is placed is formed at the other end (412) of the first handle support member (41).

According to an example of one embodiment of the present invention, a bearing (second bearing) is arranged in a through hole formed in the other end (412) of the first handle support portion (41), and a second connecting pin (432) is arranged in the center hole of the second bearing. By the second bearing, the other end (412) of the first handle support portion (41) can easily rotate.

On one side (11) of the upper part (1), the place where one end (31) of the handle part (3) is placed and the place where the other end (412) of the first handle support part (41) is connected are spaced apart by a preset distance.

Meanwhile, one end (421) of the second handle support member (42) is rotatably connected to the second position (321) of the handle member (3), and the other end (422) of the second handle support member (42) is rotatably connected to the other side (12) of the upper plate member (1).

The second position (321) of the handle part (3) indicates a position spaced apart from the other end (32) of the handle part (3) by a preset distance in the direction toward the middle part of the handle part (3).

The structure in which one end (421) of the second handle support part (42) and the second position (321) of the handle part (3) are rotatably connected is explained as follows, for example.

A groove (not indicated) is formed in the longitudinal direction of the second handle support portion (42) at one end (421) of the second handle support portion (42). The second position (321) of the handle portion (3) is inserted into the groove. In addition, a connecting pin (third connecting pin) (not shown) is arranged to penetrate the one end (421) of the second handle support portion (42) and the second position (321) of the handle portion (3). The one end (421) of the second handle support portion (42) and the second position (321) of the handle portion (3) can rotate relative to each other with the third connecting pin as a rotation axis.

The third connecting pin is substantially identical to the first connecting pin (431).

The third connecting pin is formed in the shape of a rod (or bar) having a preset length. The third connecting pin may be a screw or a rivet.

A through hole in which a third connecting pin is placed is formed at each end (421) of the second handle support member (42) and the second position (321) of the handle member (3).

Each of one end (421) of the second handle support member (42) and the second position (321) of the handle member (3) can rotate around the third connecting pin as a rotation axis.

According to an example of one embodiment of the present invention, a bearing (third bearing) is arranged in a through hole formed in one end (421) of the second handle support portion (42), and a third connecting pin is arranged in a center hole of the third bearing. By means of the third bearing, one end (421) of the second handle support portion (42) and the second position (321) of the handle portion (3) can easily rotate relative to each other.

The structure in which the other end (422) of the second handle support part (42) and the other side (12) of the upper plate part (1) are rotatably connected is explained as follows.

A connecting pin (fourth connecting pin) (not shown) is positioned through the other end (422) of the second handle support member (42). Then, the end of the fourth connecting pin is fixed to the other side (12) of the upper plate member (1).

The other end (422) of the second handle support member (42) can rotate around the fourth connecting pin as a rotation axis.

The fourth connecting pin is substantially identical to the second connecting pin (432).

The fourth connecting pin is formed in the shape of a rod (or bar) having a preset length. The fourth connecting pin may be a screw or a rivet.

A through hole in which a fourth connecting pin is placed is formed at the other end (422) of the second handle support member (42).

According to an example of one embodiment of the present invention, a bearing (fourth bearing) is arranged in a through hole formed in the other end (422) of the second handle support member (42), and a fourth connecting pin is arranged in the center hole of the fourth bearing. By the fourth bearing, the other end (422) of the second handle support member (42) can easily rotate.

On the other side (12) of the upper part (1), the place where the other end (32) of the handle part (3) is connected and the place where the other end (422) of the second handle support part (42) is connected are spaced apart by a preset distance.

Each of the plurality of upper plate supports (5) connects the upper plate (1) and the lower plate (2).

A plurality of top plate supports (5) can support the top plate (1).

The plurality of upper plate supports (5) include a first upper plate support (51), a second upper plate support (52), a third upper plate support (53), and a fourth upper plate support (54).

Each of the first upper plate support member (51) to the fourth upper plate support member (54) is formed in a rod shape having a preset length. Each of the first upper plate support member (51) to the fourth upper plate support member (54) may be formed in a straight shape or may have one or more bent portions.

Each of the first upper plate support member (51) to the fourth upper plate support member (54) includes one end and the other end. The one end and the other end represent ends positioned at opposite positions.

The first upper plate support member (51) and the second upper plate support member (52) are connected to each other so as to be able to rotate relative to each other, and the third upper plate support member (53) and the fourth upper plate support member (54) are connected to each other so as to be able to rotate relative to each other.

According to an example of one embodiment of the present invention, the first upper plate support member (51) and the third upper plate support member (53) can be formed with the same shape, and the second upper plate support member (52) and the fourth upper plate support member (54) can be formed with the same shape.

One end (511) of the first upper plate support member (51) is rotatably connected to one end (31) of the handle member (3), and the other end (512) of the first upper plate support member (51) is rotatably connected to the driving member (6) (first driving member (61)) arranged on the lower plate member (2).

The structure in which one end (511) of the first upper plate support member (51) and one end (31) of the handle member (3) are rotatably connected is explained as follows, for example.

A groove (or hole) is formed in one end (511) of the first upper plate support member (51) in a direction orthogonal to the longitudinal direction of the first upper plate support member (51).

And, at one end (31) of the handle portion (3), a hole is formed in a direction orthogonal to the longitudinal direction of the handle portion (3).

The groove formed in one end (511) of the first upper plate support member (51) and the hole formed in one end (31) of the handle member (3) are arranged to be in communication with each other.

A top plate moving pin (first top plate moving pin (513)) is placed in a groove formed in one end (511) of the first top plate support member (51) and a hole formed in one end (31) of the handle member (3).

The first upper plate moving pin (513) is formed in a rod (or bar) shape with a preset length. The first upper plate moving pin (513) may be a screw or a rivet.

The thickness of the first top plate moving pin (513) may vary along the longitudinal direction.

The first upper plate moving pin (513) includes one end and the other end. The one end and the other end represent ends positioned at opposite positions.

The first top plate moving pin (513) is positioned by penetrating a hole formed in one end (31) of the handle portion (3). Then, one end of the first top plate moving pin (513) is positioned in the first top plate moving groove portion (111) formed in one side (11) of the top plate portion (1). Then, the other end of the first top plate moving pin (513) is positioned in a groove formed in one end (511) of the first top plate support portion (51).

One end (511) of the first upper plate support member (51) and one end (31) of the handle member (3) can rotate relative to each other with the first upper plate moving pin (513) as the rotation axis.

Each of one end (511) of the first upper plate support member (51) and one end (31) of the handle member (3) can rotate around the first upper plate moving pin (513) as a rotation axis.

One end of the first upper plate moving pin (513) is positioned in the first upper plate moving groove (111) of the upper plate portion (1), and can slide in the longitudinal direction of the first upper plate moving groove (111) and support the upper plate portion (1).

One end (511) of the first upper plate support member (51) is movably connected to one side (11) of the upper plate member (1). Specifically, one end (511) of the first upper plate support member (51) is movably connected to the first upper plate moving groove (111) of the upper plate member (1) by the first upper plate moving pin (513) (via the first upper plate moving pin (513)).

In addition, the first upper plate support member (51) is rotatably connected to one side (11) of the upper plate portion (1) by the first upper plate moving pin (513) (via the first upper plate moving pin (513)) and can support the upper plate portion (1).

According to an example of one embodiment of the present invention, a bearing (fifth bearing) is arranged in each of a groove formed in one end (511) of the first upper plate support portion (51) and a hole formed in one end (31) of the handle portion (3), and a first upper plate moving pin (513) is arranged in the center hole of the fifth bearing. By means of the fifth bearing, one end (511) of the first upper plate support portion (51) and one end (31) of the handle portion (3) can easily rotate relative to each other.

The structure in which the other end (512) of the first upper plate support member (51) and the driving member (6) (first driving member (61)) arranged on the lower plate member (2) are rotatably connected is explained as follows, for example.

A hole is formed in the other end (512) of the first upper plate support member (51) in a direction orthogonal to the longitudinal direction of the first upper plate support member (51).

A rotation shaft (611) of the first driving unit (61), which will be described later, is placed in a hole formed in the other end (512) of the first upper plate support unit (51).

The other end (512) of the first upper plate support member (51) can rotate around the rotation axis (611) of the first driving member (61).

The other end (512) of the first upper plate support member (51) is rotatably connected to the lower plate member (2). Specifically, the other end (512) of the first upper plate support member (51) is rotatably connected to the lower plate member (2) by the first driving member (61) arranged in the lower plate member (2) (via the first driving member (61)).

In addition, the first upper plate support member (51) is connected to the lower plate member (2) by the first driving member (61) (via the first driving member (61)) and can support the upper plate member (1).

According to an example of one embodiment of the present invention, when the rotation shaft part (611) of the first driving part (61) rotates, the first upper plate support part (51) can also rotate together with the rotation shaft part (611) of the first driving part (61).

Gears and/or other components that cause the first upper plate support (51) to rotate when the rotation shaft (611) of the first drive unit (61) rotates may be arranged in a hole formed in the other end (512) of the first upper plate support (51) and/or in the rotation shaft (611) of the first drive unit (61).

The first upper plate support member (51) includes a connecting member (first connecting member).

The first connecting portion may be a hole or a groove.

The first connecting portion is formed in a direction orthogonal to the longitudinal direction of the first upper plate support portion (51).

The first connecting portion is formed between one end (511) and the other end (512) of the first upper plate support portion (51).

An intermediate connecting pin (first intermediate connecting pin (514)) is inserted and placed in the first connecting portion.

The first upper plate support member (51) can rotate around the first intermediate connecting pin (514) as a rotation axis.

The first upper plate support member (51) is rotatably connected to the second upper plate support member (52) described later by the first intermediate connecting pin (514) (via the first intermediate connecting pin (514)).

The first intermediate connecting pin (514) is formed in a rod (or bar) shape having a preset length. The first intermediate connecting pin (514) may be a screw or a rivet.

According to an example of one embodiment of the present invention, a bearing is arranged in the first connecting portion, and a first intermediate connecting pin (514) is arranged in the center hole of the bearing. By means of the bearing, the first upper plate support portion (51) can easily rotate.

One end (521) of the second upper plate support member (52) is rotatably connected to the other end (412) of the first handle support member (41), and the other end (522) of the second upper plate support member (52) is rotatably connected to the lower plate member (2).

The structure in which one end (521) of the second upper plate support member (52) and the other end (412) of the first handle support member (41) are rotatably connected is explained as follows, for example.

A hole is formed in one end (521) of the second upper plate support member (52) in a direction orthogonal to the longitudinal direction of the second upper plate support member (52).

The hole formed in one end (521) of the second upper plate support member (52) and the through hole formed in the other end (412) of the first handle support member (41) are arranged to be in communication with each other.

A second connecting pin (432) is placed in a hole formed in one end (521) of the second upper plate support member (52) and a through hole formed in the other end (412) of the first handle support member (41). The end of the second connecting pin (432) is fixed to one side (11) of the upper plate member (1).

The second connecting pin (432) connects one end (521) of the second upper plate support (52) and the other end (412) of the first handle support (41).

One end (521) of the second upper plate support member (52) and the other end (412) of the first handle support member (41) can rotate relative to each other with the second connecting pin (432) as the rotation axis.

Each of one end (521) of the second upper plate support member (52) and the other end (412) of the first handle support member (41) can rotate around the second connecting pin (432) as a rotation axis.

In addition, the second upper plate support member (52) is rotatably connected to one side (11) of the upper plate portion (1) by the second connecting pin (432) (via the second connecting pin (432)) and can support the upper plate portion (1).

According to an example of one embodiment of the present invention, a bearing (sixth bearing) is arranged in a hole formed in one end (521) of the second upper plate support member (52), and a second connecting pin (432) is arranged in the center hole of the sixth bearing. By the sixth bearing, one end (521) of the second upper plate support member (52) can easily rotate.

The structure in which the other end (522) of the second upper plate support member (52) and the lower plate member (2) are rotatably connected is explained as follows.

A groove (or hole) is formed in the other end (522) of the second upper plate support member (52) in a direction orthogonal to the longitudinal direction of the second upper plate support member (52).

A lower plate moving pin (first lower plate moving pin (523)) is placed in a groove formed in the other end (522) of the second upper plate support member (52). The groove may be a hole.

The first lower plate moving pin (523) is formed in a rod (or bar) shape with a preset length. The first lower plate moving pin (523) may be a screw or a rivet.

The thickness of the first lower plate moving pin (523) may vary along the longitudinal direction.

The first lower plate moving pin (523) includes one end and the other end. The one end and the other end represent ends positioned at opposite positions.

One end of the first lower plate moving pin (523) is placed in the first lower plate moving groove (211) formed on one side (21) of the lower plate (2). And, the other end of the first lower plate moving pin (523) is placed in a groove formed on the other end (522) of the second upper plate support (52).

The other end (522) of the second upper plate support member (52) can rotate around the first lower plate moving pin (523) as a rotation axis.

One end of the first lower plate moving pin (523) is positioned in the first lower plate moving groove (211) of the lower plate (2), and can slide in the longitudinal direction of the first lower plate moving groove (211) and support the upper plate (1).

The other end (522) of the second upper plate support member (52) is movably connected to one side (21) of the lower plate member (2). Specifically, the other end (522) of the second upper plate support member (52) is movably connected to the first lower plate moving groove (211) of the lower plate member (2) by the first lower plate moving pin (523) (via the first lower plate moving pin (523)).

In addition, the second upper plate support member (52) is rotatably connected to the lower plate part (2) by the first lower plate moving pin (523) (via the first lower plate moving pin (523)) and can support the upper plate part (1).

According to an example of one embodiment of the present invention, a bearing (seventh bearing) is arranged in a groove formed in the other end (522) of the second upper plate support member (52), and a first lower plate moving pin (523) is arranged in the center hole of the seventh bearing. By the seventh bearing, the other end (522) of the second upper plate support member (52) can easily rotate.

The second upper plate support member (52) includes a connecting member (second connecting member).

The second connecting portion may be a hole or a groove.

The second connecting portion is formed in a direction orthogonal to the longitudinal direction of the second upper plate support portion (52).

The second connecting portion is formed between one end (521) and the other end (522) of the second upper plate support portion (52).

A first intermediate connecting pin (514) is inserted and placed in the second connecting portion.

The second upper plate support member (52) can rotate around the first intermediate connecting pin (514) as a rotation axis.

The second upper plate support member (52) is rotatably connected to the first upper plate support member (51) described above by the first intermediate connecting pin (514) (via the first intermediate connecting pin (514)).

According to an example of one embodiment of the present invention, a bearing is arranged in the second connecting portion, and a first intermediate connecting pin (514) is arranged in the center hole of the bearing. By means of the bearing, the second upper plate support portion (52) can easily rotate.

One end (531) of the third upper plate support member (53) is rotatably connected to the other end (32) of the handle member (3), and the other end (532) of the third upper plate support member (53) is rotatably connected to the driving member (6) (second driving member (62)) arranged on the lower plate member (2).

The structure in which one end (531) of the third upper plate support member (53) and the other end (32) of the handle member (3) are rotatably connected is explained as follows, for example.

A groove (or hole) is formed in one end (531) of the third upper plate support member (53) in a direction orthogonal to the longitudinal direction of the third upper plate support member (53).

And, a hole is formed in the other end (32) of the handle portion (3) in a direction orthogonal to the longitudinal direction of the handle portion (3).

The groove formed in one end (531) of the third upper plate support member (53) and the hole formed in the other end (32) of the handle member (3) are arranged to be in communication with each other.

A top plate moving pin (second top plate moving pin (533)) is placed in a groove formed in one end (531) of the third top plate support member (53) and a hole formed in the other end (32) of the handle member (3).

The second upper plate moving pin (533) may be identical to the first upper plate moving pin (513) described above.

The second upper plate moving pin (533) is formed in a rod (or bar) shape with a preset length. The second upper plate moving pin (533) may be a screw or a rivet.

The thickness of the second top plate moving pin (533) may vary along the longitudinal direction.

The second upper plate moving pin (533) includes one end and the other end. The one end and the other end represent ends positioned at opposite positions.

The second top plate moving pin (533) is positioned by penetrating a hole formed in the other end (32) of the handle portion (3). Then, one end of the second top plate moving pin (533) is positioned in the second top plate moving groove portion (121) formed in the other side (12) of the top plate portion (1). Then, the other end of the second top plate moving pin (533) is positioned in a groove formed in one end (531) of the third top plate support portion (53).

One end (531) of the third upper plate support member (53) and the other end (32) of the handle member (3) can rotate relative to each other with the second upper plate moving pin (533) as the rotation axis.

Each of one end (531) of the third upper plate support member (53) and the other end (32) of the handle member (3) can rotate around the second upper plate moving pin (533) as a rotation axis.

One end of the second upper plate moving pin (533) is positioned in the second upper plate moving groove (121) of the upper plate portion (1), and can slide in the longitudinal direction of the second upper plate moving groove (121) and support the upper plate portion (1).

One end (531) of the third upper plate support member (53) is movably connected to the other side (12) of the upper plate member (1). Specifically, one end (531) of the third upper plate support member (53) is movably connected to the second upper plate moving groove (121) of the upper plate member (1) by the second upper plate moving pin (533) (via the second upper plate moving pin (533)).

In addition, the third upper plate support member (53) is rotatably connected to the other side (12) of the upper plate portion (1) by the second upper plate moving pin (533) (via the second upper plate moving pin (533)) and can support the upper plate portion (1).

According to an example of one embodiment of the present invention, a bearing (the eighth bearing) is arranged in each of a groove formed in one end (531) of the third upper plate support portion (53) and a hole formed in the other end (32) of the handle portion (3), and a second upper plate moving pin (533) is arranged in the center hole of the eighth bearing. By means of the eighth bearing, one end (531) of the third upper plate support portion (53) and the other end (32) of the handle portion (3) can easily rotate relative to each other.

The structure in which the other end (532) of the third upper plate support member (53) and the driving member (6) (second driving member (62)) arranged on the lower plate member (2) are rotatably connected is explained as follows, for example.

A hole is formed in the other end (532) of the third upper plate support member (53) in a direction orthogonal to the longitudinal direction of the third upper plate support member (53).

A rotating shaft (621) of a second driving unit (62), described later, is placed in a hole formed in the other end (532) of the third upper plate support unit (53).

The other end (532) of the third upper plate support member (53) can rotate around the rotation axis (621) of the second driving member (62).

The other end (532) of the third upper plate support member (53) is rotatably connected to the lower plate member (2). Specifically, the other end (532) of the third upper plate support member (53) is rotatably connected to the lower plate member (2) by the second driving member (62) arranged on the lower plate member (2) (via the second driving member (62)).

In addition, the third upper plate support member (53) is connected to the lower plate member (2) by the second driving member (62) (via the second driving member (62)) and can support the upper plate member (1).

According to an example of one embodiment of the present invention, when the rotation shaft (621) of the second driving unit (62) rotates, the third upper plate support unit (53) can also rotate together with the rotation shaft (621) of the second driving unit (62).

Gears and/or other components that cause the third upper plate support (53) to rotate when the rotation shaft (621) of the second driving unit (62) rotates may be arranged in a hole formed in the other end (532) of the third upper plate support (53) and/or in the rotation shaft (621) of the second driving unit (62).

The third upper plate support member (53) includes a connecting member (third connecting member).

The third connector may be a hole or a groove.

The third connecting portion is formed in a direction orthogonal to the longitudinal direction of the third upper plate support portion (53).

The third connecting portion is formed between one end (531) and the other end (532) of the third upper plate support portion (53).

In the third connecting section, an intermediate connecting pin (second intermediate connecting pin) is inserted and placed.

The third upper plate support member (53) can rotate around the second intermediate connecting pin as a rotation axis.

The third upper plate support member (53) is rotatably connected to the fourth upper plate support member (54) described later by the second intermediate connecting pin (via the second intermediate connecting pin).

The second intermediate connecting pin is formed in the shape of a rod (or bar) having a preset length. The second intermediate connecting pin may be a screw or a rivet.

According to an example of one embodiment of the present invention, a bearing is arranged in the third connecting portion, and a second intermediate connecting pin is arranged in the center hole of the bearing. By means of the bearing, the third upper plate support portion (53) can easily rotate.

One end (541) of the fourth upper plate support member (54) is rotatably connected to the other end (422) of the second handle support member (42), and the other end (542) of the fourth upper plate support member (54) is rotatably connected to the lower plate member (2).

The structure in which one end (541) of the fourth upper plate support member (54) and the other end (422) of the second handle support member (42) are rotatably connected is explained as follows, for example.

A hole is formed in one end (541) of the fourth upper plate support member (54) in a direction orthogonal to the longitudinal direction of the fourth upper plate support member (54).

The hole formed in one end (541) of the fourth upper plate support member (54) and the through hole formed in the other end (422) of the second handle support member (42) are arranged to be in communication with each other.

A fourth connecting pin is placed in a hole formed in one end (541) of the fourth upper plate support member (54) and a through hole formed in the other end (422) of the second handle support member (42). The end of the fourth connecting pin is fixed to the other side (12) of the upper plate member (1).

The fourth connecting pin connects one end (541) of the fourth upper plate support (54) and the other end (422) of the second handle support (42).

One end (541) of the fourth upper plate support member (54) and the other end (422) of the second handle support member (42) can rotate relative to each other with the fourth connecting pin as the rotation axis.

Each of one end (541) of the fourth upper plate support member (54) and the other end (422) of the second handle support member (42) can rotate around the fourth connecting pin as a rotation axis.

In addition, the fourth upper plate support member (54) is rotatably connected to the other side (12) of the upper plate part (1) by the fourth connecting pin (via the fourth connecting pin) and can support the upper plate part (1).

According to an example of one embodiment of the present invention, a bearing (ninth bearing) is arranged in a hole formed in one end (541) of the fourth upper plate support member (54), and a fourth connecting pin is arranged in the center hole of the ninth bearing. By the ninth bearing, one end (541) of the fourth upper plate support member (54) can easily rotate.

The structure in which the other end (542) of the fourth upper plate support member (54) and the lower plate member (2) are rotatably connected is explained as follows.

A groove (or hole) is formed in the other end (542) of the fourth upper plate support member (54) in a direction orthogonal to the longitudinal direction of the fourth upper plate support member (54).

A lower plate moving pin (second lower plate moving pin (543)) is placed in a groove formed in the other end (542) of the fourth upper plate support member (54). The groove may be a hole.

The second lower plate moving pin (543) may be identical to the first lower plate moving pin (523) described above.

The second lower plate moving pin (543) is formed in a rod (or bar) shape with a preset length. The second lower plate moving pin (543) may be a screw or a rivet.

The thickness of the second lower plate moving pin (543) may vary along the longitudinal direction.

The second lower plate moving pin (543) includes one end and the other end. The one end and the other end represent ends positioned at opposite positions.

One end of the second lower plate moving pin (543) is placed in the second lower plate moving groove (221) formed on the other side (22) of the lower plate (2). And, the other end of the second lower plate moving pin (543) is placed in a groove formed on the other end (542) of the fourth upper plate support (54).

The other end (542) of the fourth upper plate support member (54) can rotate around the second lower plate moving pin (543) as a rotation axis.

One end of the second lower plate moving pin (543) is positioned in the second lower plate moving groove (221) of the lower plate (2), and can slide in the longitudinal direction of the second lower plate moving groove (221) and support the upper plate (1).

The other end (542) of the fourth upper plate support member (54) is movably connected to the other side (22) of the lower plate member (2). Specifically, the other end (542) of the fourth upper plate support member (54) is movably connected to the second lower plate moving groove (221) of the lower plate member (2) by the second lower plate moving pin (543) (via the second lower plate moving pin (543)).

In addition, the fourth upper plate support member (54) is rotatably connected to the lower plate part (2) by the second lower plate moving pin (543) (via the second lower plate moving pin (543)) and can support the upper plate part (1).

According to an example of one embodiment of the present invention, a bearing (the tenth bearing) is arranged in a groove formed in the other end (542) of the fourth upper plate support member (54), and a second lower plate moving pin (543) is arranged in the center hole of the tenth bearing. By the tenth bearing, the other end (542) of the fourth upper plate support member (54) can easily rotate.

The fourth upper plate support member (54) includes a connecting member (fourth connecting member).

The fourth connector may be a hole or a groove.

The fourth connecting portion is formed in a direction orthogonal to the longitudinal direction of the fourth upper plate support portion (54).

The fourth connecting portion is formed between one end (541) and the other end (542) of the fourth upper plate support portion (54).

A second intermediate connecting pin is inserted and placed in the fourth connecting section.

The fourth upper plate support member (54) can rotate around the second intermediate connecting pin as a rotation axis.

The fourth upper plate support member (54) is rotatably connected to the third upper plate support member (53) described above by the second intermediate connecting pin (via the second intermediate connecting pin).

According to an example of one embodiment of the present invention, a bearing is arranged in the fourth connecting portion, and a second intermediate connecting pin is arranged in the center hole of the bearing. By means of the bearing, the fourth upper plate support portion (54) can easily rotate.

The driving unit (6) can drive the height adjustment device of the present invention. Specifically, the driving unit (6) can separate the upper part (1) from the lower part (2) by a preset distance, or can place the upper part (1) adjacent to the lower part (2). Fig. 1 shows a state in which the upper part (1) and the lower part (2) are separated (unfolded state). Fig. 2 shows a state in which the upper part (1) and the lower part (2) are adjacently placed (folded state).

Alternatively, the driving unit (6) can move the height adjustment device of the present invention by rotating the wheel (7). That is, the wheel (7) can rotate by driving the driving unit (6).

The driving unit (6) may be, for example, a motor, which is a well-known component.

The driving unit (6) includes a first driving unit (61) and a second driving unit (62).

The first driving unit (61) is placed in the first motor receiving unit (212) of the lower plate (2), and the second driving unit (62) is placed in the second motor receiving unit (222) of the lower plate (2).

The first driving part (61) is connected to the first upper plate support part (51). Specifically, the rotation shaft part (611) of the first driving part (61) is inserted into a hole formed in the other end part (512) of the first upper plate support part (51).

And, the second driving part (62) is connected to the third upper plate support part (53). Specifically, the rotation shaft part (621) of the second driving part (62) is inserted into a hole formed in the other end part (532) of the third upper plate support part (53).

When the rotation shaft (611, 621) of the driving unit (6) rotates in one direction (for example, clockwise) by the driving of the driving unit (6), the first upper plate support unit (51) and the third upper plate support unit (53) rotate in one direction. Accordingly, the upper plate unit (1) is separated from the lower plate unit (2). In other words, the upper plate unit (1) rises.

When the first upper plate support member (51) and the third upper plate support member (53) rotate, one end (511) of the first upper plate support member (51) moves from the front side to the rear side along the first upper plate moving groove (111) of the upper plate member (1) together with the first upper plate moving pin (513), and one end (531) of the third upper plate support member (53) moves from the front side to the rear side along the second upper plate moving groove (121) of the upper plate member (1) together with the second upper plate moving pin (533).

At this time, one end (31) of the handle part (3) connected to the first upper plate moving pin (513) and the other end (32) of the handle part (3) connected to the second upper plate moving pin (533) rotate in the opposite direction (for example, counterclockwise) of one direction, so that the middle part of the handle part (3) rises.

And, when the first upper plate support member (51) and the third upper plate support member (53) rotate, the other end (522) of the second upper plate support member (52) connected to the first upper plate support member (51) moves from the front side to the rear side along the first lower plate moving groove (211) of the lower plate member (2) together with the first lower plate moving pin (523), and also, the other end (542) of the fourth upper plate support member (54) connected to the third upper plate support member (53) moves from the front side to the rear side along the second lower plate moving groove (221) of the lower plate member (2) together with the second lower plate moving pin (543).

When the other end (522) of the second upper plate support member (52) and the other end (542) of the fourth upper plate support member (54) complete movement toward the rear, the first lower plate moving pin (523) is inserted into and fixed in a catch groove (first catch groove) (2111) formed in the first lower plate moving groove (211), and the second lower plate moving pin (543) is inserted into and fixed in a catch groove (second catch groove) (2211) formed in the second lower plate moving groove (221).

When the first lower plate moving pin (523) is fixed to the first engaging groove (2111) and the second lower plate moving pin (543) is fixed to the second engaging groove (2211), the second upper plate support member (52) and the fourth upper plate support member (54) are fixed and no longer rotated. Accordingly, the first upper plate support member (51) and the third upper plate support member (53) are also fixed and no longer rotated.

In addition, due to the driving stop of the driving unit (6), the first upper plate support member (51) and the third upper plate support member (53) no longer rotate and are fixed. Due to this, the second upper plate support member (52) and the fourth upper plate support member (54) also no longer rotate and are fixed. The driving stop of the driving unit (6) indicates that the rotational shaft member (611, 621) of the driving unit (6) does not rotate.

According to an example of one embodiment of the present invention, the first lower plate moving pin (523) and the second lower plate moving pin (543) can be moved into the engaging groove (2111, 2211) and can be removed from the engaging groove (2111, 2211) by pressure from the user.

Alternatively, according to an example of another embodiment of the present invention, each of the first lower plate moving pin (523) and the second lower plate moving pin (543) may be connected to an elastic member (e.g., a coil spring) (not shown). When the lower plate moving pins (523, 543) are arranged in the lower plate moving grooves (211, 221), the elastic members are elastically deformed to have elastic force, and when the lower plate moving pins (523, 543) reach the engaging grooves (2111, 2211), the lower plate moving pins (523, 543) move into the engaging grooves (2111, 2211) due to the restoring force of the elastic members.

By the above-described process, the height adjustment device of the present invention is in an unfolded state as shown in Fig. 1.

Conversely, when the lower plate moving pin (523, 543) is detached from the engaging groove (2111, 2211) formed in the lower plate moving groove (211, 221) (for example, it may be detached by the user's pressure), when the rotation shaft (611, 621) of the driving unit (6) is rotated in the opposite direction to one direction by the driving of the driving unit (6), the first upper plate support (51) and the third upper plate support (53) rotate in the opposite direction to one direction. Accordingly, the upper plate (1) moves toward the lower plate (2). In other words, the upper plate (1) is lowered.

When the first upper plate support member (51) and the third upper plate support member (53) rotate, one end (511) of the first upper plate support member (51) moves from the rear side to the front side along the first upper plate moving groove (111) of the upper plate member (1) together with the first upper plate moving pin (513), and one end (531) of the third upper plate support member (53) moves from the rear side to the front side along the second upper plate moving groove (121) of the upper plate member (1) together with the second upper plate moving pin (533).

At this time, one end (31) of the handle part (3) connected to the first upper plate moving pin (513) and the other end (32) of the handle part (3) connected to the second upper plate moving pin (533) rotate in one direction, so that the middle part of the handle part (3) descends.

And, when the first upper plate support member (51) and the third upper plate support member (53) rotate, the other end (522) of the second upper plate support member (52) connected to the first upper plate support member (51) moves from the rear side to the front side along the first lower plate moving groove (211) of the lower plate member (2) together with the first lower plate moving pin (523), and also, the other end (542) of the fourth upper plate support member (54) connected to the third upper plate support member (53) moves from the rear side to the front side along the second lower plate moving groove (221) of the lower plate member (2) together with the second lower plate moving pin (543).

When the other end (522) of the second upper plate support member (52) and the other end (542) of the fourth upper plate support member (54) complete movement toward the front, the height adjustment device of the present invention is folded as shown in FIG. 2.

Meanwhile, the height adjustment device of the present invention includes an electric storage unit (not shown).

The electrical storage unit represents a device that stores electricity, for example, a rechargeable battery.

The driving unit (6) is electrically connected to the electric storage unit and receives the electricity required for driving from the electric storage unit.

The electric storage unit is placed in the motor receiving unit (212, 222) of the lower part (2). Alternatively, the electric storage unit may be placed in a location other than the motor receiving unit (212, 222).

The height adjustment device of the present invention may further include components that allow an electric storage unit to be placed.

According to examples of the embodiment of the present invention, the driving unit of the height adjustment device of the present invention can be connected to the central portion of the rear wheel axle.

In addition, while the upper part (1) moves up and down, a sensor is placed on the upper part (1) to prevent safety accidents during the up and down movement of the upper part (1). For example, when a proximity and load sensor placed on the upper part (1) detects a user, etc., the operation of the driving part stops.

In addition, the height adjustment device of the present invention is equipped with a gyro sensor and a gimbal device, so as to minimize shaking when getting on and off infants, pets, and cargo.

In addition, the height adjustment device of the present invention is equipped with a transmission, so that the wheels can be easily driven uphill and downhill (securing power assistance function).

In addition, the height adjustment device of the present invention has a control unit, and the control unit controls the operation of an electrically connected driving unit to move the upper part up and down to put the infant to sleep, and also moves the wheels forward and backward.

In this way, the height adjustment device according to the example of the embodiment of the present invention can be applied to a baby stroller, a device for pushing a pet, or a device for transporting cargo.

In addition, since the height adjustment device of the present invention can adjust the height of the upper part, it makes it easy for infants, pets, cargo, etc., that can be carried on the upper part to get on and off.

In addition, since the height adjustment device of the present invention uses a driving unit (power), it is convenient for the user to use and operate.

In addition, the height adjustment device of the present invention is easy to carry because its size can be reduced.

1: Top part
111: 1st top plate moving home section
121: Second upper plate moving home part 2: Lower plate part
211: First lower plate moving home section 221: Second lower plate moving home section
3: Handle part 311: First position of handle part
321: Second position of the handle 4: Handle support
41: First handle support 42: Second handle support
5: Top plate support 51: First top plate support
513: First top plate moving pin 52: Second top plate support
523: 1st lower plate moving pin 53: 3rd upper plate support
533: 2nd top plate moving pin 54: 4th top plate support
543: Second lower plate moving pin 6: Driving part
61: First driving part 611: Rotating shaft of first driving part
62: Second driving part 621: Rotating shaft of second driving part
7: Wheel

Claims (14)

top part;
A lower part positioned below the upper part;
A handle part having one end movably connected to one side of the upper part and the other end movably connected to the other side of the upper part;
A plurality of handle support parts rotatably connected to the upper part and the handle part;
A plurality of upper plate support members connecting the upper plate and the lower plate; and
Including a driving unit arranged on the lower part,
A height adjustment device in which, by driving the driving unit, the upper part is spaced apart from the lower part by a preset distance or is placed adjacent to the lower part.
In the first paragraph,
A first top plate moving groove is formed on one side of the top plate,
A height adjustment device in which a second top plate moving groove is formed on the other side of the top plate.
In the first paragraph,
A first lower plate moving groove is formed on one side of the lower plate,
A height adjustment device in which a second lower plate moving groove is formed on the other side of the lower plate.
In the first paragraph,
The above plurality of handle supports include a first handle support and a second handle support,
One end of the first handle support is rotatably connected to the first position of the handle, and the other end of the first handle support is rotatably connected to one side of the upper plate.
A height adjustment device, wherein one end of the second handle support is rotatably connected to a second position of the handle portion, and the other end of the second handle support is rotatably connected to the other side of the upper plate portion.
In paragraph 4,
The above plurality of top plate supports include a first top plate support, a second top plate support, a third top plate support, and a fourth top plate support,
A height adjustment device, wherein the first upper plate support portion and the second upper plate support portion are connected to each other so as to be able to rotate relative to each other, and the third upper plate support portion and the fourth upper plate support portion are connected to each other so as to be able to rotate relative to each other.
In paragraph 5,
One end of the first top plate support member is rotatably connected to one end of the handle member, and the other end of the first top plate support member is rotatably connected to the driving member.
A height adjustment device, wherein one end of the third top plate support is rotatably connected to the other end of the handle part, and the other end of the third top plate support is rotatably connected to the driving part.
In Article 6,
A first top plate moving pin is arranged in a groove formed at one end of the first top plate support portion and a hole formed at one end of the handle portion.
A height adjustment device in which a second top plate moving pin is arranged in a groove formed in one end of the third top plate support portion and a hole formed in the other end of the handle portion.
In Article 7,
A first top plate moving groove is formed on one side of the top plate, and a second top plate moving groove is formed on the other side of the top plate.
One end of the first top plate moving pin is positioned in the first top plate moving groove and is capable of sliding in the length direction of the first top plate moving groove.
A height adjustment device in which one end of the second upper plate moving pin is positioned in the second upper plate moving groove and is capable of sliding in the longitudinal direction of the second upper plate moving groove.
In Article 6,
A height adjustment device, wherein the driving unit includes a first driving unit arranged in a first motor receiving unit formed on one side of the lower plate, and a second driving unit arranged in a second motor receiving unit formed on the other side of the lower plate.
In Article 9,
The other end of the first upper plate support is connected to the rotational shaft of the first driving unit and rotates by driving of the first driving unit.
A height adjustment device in which the other end of the third upper plate support member is connected to the rotational shaft of the second driving member and rotates by driving of the second driving member.
In paragraph 5,
One end of the second upper plate support is rotatably connected to the other end of the first handle support, and the other end of the second upper plate support is rotatably connected to the lower plate.
A height adjustment device, wherein one end of the fourth upper plate support is rotatably connected to the other end of the second handle support, and the other end of the fourth upper plate support is rotatably connected to the lower plate.
In Article 11,
A first lower plate moving pin is arranged in a groove formed at the other end of the second upper plate support portion,
A height adjustment device in which a second lower plate moving pin is placed in a groove formed at the other end of the fourth upper plate support member.
In Article 12,
A first lower plate moving groove is formed on one side of the lower plate, and a second lower plate moving groove is formed on the other side of the lower plate.
One end of the first lower plate moving pin is positioned in the first lower plate moving groove and is capable of sliding in the length direction of the first lower plate moving groove.
A height adjustment device in which one end of the second lower plate moving pin is positioned in the second lower plate moving groove and is capable of sliding in the longitudinal direction of the second lower plate moving groove.
In the first paragraph,
comprising a plurality of wheels rotatably connected to the lower part;
A height-adjusting device in which the plurality of wheels are rotatable by driving the above driving unit.