CN113352965B

CN113352965B - Gear type telescopic supporting leg and child safety seat

Info

Publication number: CN113352965B
Application number: CN202110543483.XA
Authority: CN
Inventors: 蓝晓艳; 丁鹏飞; 赵春耕
Original assignee: Anhui Yongchi Infant Intelligence Technology Co ltd
Current assignee: Anhui Yongchi Infant Technology Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2023-08-08
Anticipated expiration: 2041-05-19
Also published as: CN113352965A

Abstract

The invention discloses a gear telescopic supporting leg and a child safety seat, which comprise an outer tube, an inner tube, a gear plate and a gear pin; the inner pipe is sleeved in the outer pipe in a sliding way and can stretch from one end of the outer pipe; the gear plate is connected to one side of the inner tube and extends along the length direction of the inner tube; the gear pin is arranged on the outer tube, the gear plate is provided with a plurality of gear holes which are longitudinally arranged, the gear pin is operatively inserted into one of the gear holes to fix the relative positions of the inner tube and the outer tube, the length of the supporting leg is adjusted by the gear, and the gear plate is additionally arranged in the inner tube, so that the influence of direct hole opening on the rigidity of the inner tube is avoided, the inner tube is supported, the structural strength of the inner tube is improved, and the stability of the supporting structure is ensured.

Description

Gear type telescopic supporting leg and child safety seat

Technical Field

The invention relates to a child safety seat, in particular to a gear telescopic supporting leg of the child safety seat.

Background

In order to ensure the safety of children when riding, the child safety seat is widely applied to daily travel. The child safety seat comprises a seat body for sitting and a base for placing the seat body, wherein an ISOFIX assembly is usually arranged on the rear side of the base, and the ISOFIX assembly is fixedly connected with an ISOFIX interface on the automobile seat after being docked so as to bind the child safety seat.

However, when the automobile collides or suddenly decelerates during the high-speed movement, the child safety seat receives huge acting force due to inertia, so that the supporting legs supported on the automobile bottom plate are additionally arranged on the base. Because of the different sizes of the vehicle types and the heights of the vehicle seats, the supporting legs are generally designed into a telescopic structure.

The utility model provides a length adjustable children's safety seat supporting leg of authorized bulletin number CN210191236U and including its children's seat, the children's safety seat supporting leg gear adjustment mechanism of authorized bulletin number CN212950269U authorizes a children's car safety seat supporting leg of bulletin number CN205326848U, the car safety seat of application publication number CN109398174A and supporting leg device, has all published the flexible supporting leg structure of gear type.

In production practice, in order to facilitate molding and improve production efficiency, the support legs are usually rigid plastic parts or aluminum die castings with certain strength. In the above patent document, the gear type hole structures for positioning are integrally formed on the inner tube or the outer tube of the support leg, and the arrangement of the hole structures may deteriorate the strength of the member.

Disclosure of Invention

The invention aims to provide a supporting device of a child safety seat, which can be conveniently hidden in a base of the child safety seat when not in use, can improve the use comfort and the storage convenience of the child safety seat at the same time, and further provides the child safety seat with the supporting device of the child safety seat.

The technical scheme adopted for solving the technical problems is as follows: the gear telescopic supporting leg comprises an outer pipe, an inner pipe, a gear plate and a gear pin; the inner pipe is sleeved in the outer pipe in a sliding manner and can stretch from one end of the outer pipe; the gear plate is connected to one side of the inner tube and extends along the length direction of the inner tube; the gear pin is arranged on the outer tube, the gear plate is provided with a plurality of gear holes which are longitudinally arranged, and the gear pin is operatively inserted into one of the gear holes to fix the relative positions of the inner tube and the outer tube, so that the length of the supporting leg can be adjusted in a gear mode.

The technical scheme adopted by the invention for further optimizing the technical problems is as follows: the inner tube is an aluminum die casting, and the gear plate is made of iron or steel.

The technical scheme adopted by the invention for further optimizing the technical problems is as follows: the outer tube is positioned at the upper end, and the inner tube extends out from the lower end of the outer tube for supporting the vehicle floor.

The technical scheme adopted by the invention for further optimizing the technical problems is as follows: the inner tube is provided with a groove extending along the length direction, and the gear plate is arranged in the groove.

The technical scheme adopted by the invention for further optimizing the technical problems is as follows: the outer tube is provided with protruding muscle with the recess matches, protruding muscle is in the recess slides in order to play the guide effect.

The technical scheme adopted by the invention for further optimizing the technical problems is as follows: at least one end of the gear plate is bent to form a connecting part, and the connecting part is connected to the end face of the inner tube.

The technical scheme adopted by the invention for further optimizing the technical problems is as follows: the connecting part is connected with the end face of the inner pipe through a screw assembly.

The technical scheme adopted by the invention for further optimizing the technical problems is as follows: the gear pin is arranged at one end of the actuating piece; pressing the other end of the actuating member rotates the actuating member, thereby causing the shift pin to extend into or out of the shift hole.

The technical scheme adopted by the invention for further optimizing the technical problems is as follows: the outer tube is provided with a mounting groove for accommodating the executing piece and the gear pin, the mounting groove is closed by a cover body, the pressing end of the executing piece is provided with a key which can be operated, and the key is exposed out of the outer surface of the cover body.

Another subject of the invention: the child safety seat comprises a base, a seat body and the gear type telescopic supporting legs.

Compared with the prior art, the invention has the advantages that the gear plate is additionally arranged in the inner tube, and the gear hole is arranged on the gear plate, so that the influence of direct perforation on the rigidity of the inner tube is avoided, the inner tube is supported, the structural strength of the inner tube is improved, and the stability of the supporting structure is ensured.

Drawings

The invention will be described in further detail below in connection with the drawings and the preferred embodiments, but it will be appreciated by those skilled in the art that these drawings are drawn for the purpose of illustrating the preferred embodiments only and thus should not be taken as limiting the scope of the invention. Moreover, unless specifically indicated otherwise, the drawings are merely schematic representations, not necessarily drawn to scale, of the compositions or constructions of the described objects, which may include exaggerated representations.

FIG. 1 is a schematic perspective view of a child safety seat with support legs in an extended state;

FIG. 2 is a schematic perspective view of the child safety seat with the support legs shortened;

FIG. 3 is a schematic perspective view of the child safety seat with the support legs in a collapsed state;

FIG. 4 is a schematic top view of the child safety seat with the support legs in a collapsed state;

FIG. 5 is a schematic view of a partial structure with the support legs folded and retained in the receiving slots;

FIG. 6 is a schematic view of a base of the child safety seat with support legs in a collapsed state;

FIG. 7 is an assembled structure of the support leg and the base in a folded state

FIG. 8 is an enlarged partial schematic view at B1 in FIG. 7;

FIG. 9 is an assembled structure of the support leg and the base in the unfolded state of the support leg

FIG. 10 is an enlarged partial schematic view at B2 in FIG. 9;

FIG. 11 is an exploded view of the support leg, the articulating base and the positioning member;

FIG. 12 is a schematic view of the structure of the support leg in a shortened state;

FIG. 13 is a schematic view of a support leg in an extended state;

FIG. 14 is a schematic view of the support leg with the cover removed;

FIG. 15 is a schematic view of a partial structure of the support leg with the cover removed;

FIG. 16 is a second schematic view of the support leg in an extended state;

FIG. 17 is a side cross-sectional view of the support foot in a shift pin locked condition;

FIG. 18 is an enlarged partial schematic view at B3 in FIG. 17;

FIG. 19 is a side cross-sectional view of the support foot in the shift pin unlocked state;

FIG. 20 is an enlarged partial schematic view at B4 in FIG. 19;

FIG. 21 is an exploded view of the outer tube of the support leg;

FIG. 22 is a schematic view of the inner tube and gear plate assembly of the support leg;

FIG. 23 is an exploded view of the inner tube and gear plate of the support leg;

FIG. 24 is a schematic perspective view of a shift pin of the support leg;

FIG. 25 is a schematic perspective view of an actuator controlling a shift pin;

FIG. 26 is a second perspective view of an actuator controlling a shift pin;

FIG. 27 is an exploded schematic view of an actuator controlling a shift pin;

FIG. 28 is a schematic perspective view of a support bracket with an implement mounted thereto;

FIG. 29 is a schematic view of the child safety seat base housing lower shell.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative, exemplary, and should not be construed as limiting the scope of the invention.

It should be noted that: like reference numerals denote like items in the following figures, and thus once an item is defined in one figure, it may not be further defined and explained in the following figures.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention.

As shown in fig. 1 to 3, the child safety seat includes a seat body 100 and a base 200, the seat body 100 is mounted on the base 200, and upper ends of support legs 300 are connected to a front side of the base 200 such that the support legs 300 can be disposed in a vertical direction to exert a supporting function. In at least one usage scenario, two ISOFIX assemblies on the base 200 are in butt joint with ISOFIX interfaces on the car seat, the lower ends of the supporting legs 300 are supported on the vehicle floor, and the stability of the installation of the child safety seat is enhanced through three-point fixation.

Because of the different sizes of the vehicle models and the different heights of the vehicle seats, the supporting leg 300 provided by the embodiment can stretch and retract in gear according to specific use requirements so as to obtain the required length, and thus the supporting leg is more stably supported on the vehicle bottom plate.

As shown in fig. 1, 13, 14, 15, the gear-type telescopic support leg 300 provided in the present embodiment includes an outer tube 301, an inner tube 302, a gear plate 303, and a gear pin 304. Wherein the inner tube 302 is slidably sleeved in the outer tube 301, and one end of the outer tube 301 is opened, and the inner tube 302 can be extended or retracted from the opening, thereby realizing the extension and retraction between the inner tube 301 and the outer tube 301, so that the support leg 300 has an adjustable actual length.

As shown in fig. 13 and 14, preferably, the lower end of the inner tube is provided with a support base Z, and when the support legs are contracted, the inner tube extends into the inner cavity of the outer tube, and the support base Z is exposed at the lower end of the outer tube to facilitate the stretching operation.

Unlike the conventional art in which holes or grooves are directly formed in the inner tube 302 or the outer tube 301. As shown in fig. 13, 14, 22 and 23, a separate gear plate 303 is disposed in the support leg 300 in this embodiment, and the gear plate 303 is connected to one side of the inner tube 302 and extends along the length direction of the inner tube 302, and the gear plate 303 has a plurality of gear holes K arranged longitudinally. Correspondingly, the gear pin 304 is disposed on the outer tube 301 and can move laterally, so as to be operatively inserted into one of the gear holes K, so as to adjust the relative positions of the inner tube 302 and the outer tube 301, thereby realizing mutual fixation of the inner tube 302 and the outer tube 301 after moving, and further adjusting the length of the support leg 300 in gear.

It can be seen that the influence of the processing of the hole structure on the strength of the pipe fitting of the supporting leg 300 is avoided by arranging the gear hole K on the gear plate 303 which is additionally manufactured, and the inner pipe 302 is reinforced by arranging the gear plate 303, so that the structural strength of the supporting leg 300 is improved.

In addition, as a material alternative, the inner tube 302 and the outer tube 301 may be made of plastic or metal. For ease of manufacturing, the inner tube 302 and the outer tube 301 are typically rigid plastic parts or aluminum die castings having some strength. And preferably, the gear plate 303 is made of iron or steel having strength and hardness greater than those of plastic and aluminum. It can be seen that the provision of the shift plate 303 can greatly enhance the rigidity of the inner tube 302. And gear hole K sets up difficult emergence wearing and tearing on the gear board 303 that iron or steel were made, has avoided the increase of location clearance in the long-term use, ensures that supporting leg 300 is flexible smoothly.

Preferably, the outer tube 301 is a hollow tube formed by plastic injection molding in this embodiment, the inner tube 302 is an aluminum die casting, and the gear plate 303 is made of iron or steel.

In this embodiment, the upper end of the outer tube 301 is connected to the front side of the base 200 of the child safety seat, and the inner tube 302 extends downward from the lower end of the outer tube 301 for the vehicle floor. Alternatively, the outer tube 301 may be connected to the base by a rotational or fixed connection. Of course, the connection is not limited to the above, and the inner tube 302 may be disposed at the upper end and the outer tube 301 may be disposed at the lower end.

Alternatively, gear plate 303 is removably or fixedly attached to inner tube 302. And the detachable connection is used to facilitate the assembly and maintenance of the gear plate 303.

Preferably, a limiting structure for limiting the inner tube 302 to be separated from the outer tube 301 is arranged between the outer tube 301 and the inner tube 302, when the outer tube 301 and the inner tube 302 are stretched to the longest length, one gear hole K of the gear plate 303 is aligned with the gear pin 304, and two-tube fixation at the limiting position can be realized.

As shown in fig. 17-20, 22 and 23, the inner tube 302 is provided with a recess C extending in the longitudinal direction, and the gear plate 303 is an elongated member provided in the recess C. The opening of the groove C faces one side of the gear pin 304, and the gear pin 304 extends into the groove C from the opening of the groove C and is matched with the gear hole K of the gear plate 303 to realize gear adjustment. It should be noted that the shift plate 303 has a certain thickness and the shift hole K has a certain depth, or the shift plate 303 is spaced apart from the bottom of the groove C by a certain distance so that the shift pin 304 can be stably restrained in the shift hole K.

As shown in fig. 16, preferably, the inner wall of the outer tube 301 is provided with a protruding rib T matching with the groove C, and the protruding rib T extends into the groove C from the opening of the groove C and can slide along the groove C, so as to play a guiding role on the relative movement of the inner tube 302 and the outer tube 301, and avoid the inner tube 301 from being offset due to the radial clearance, so that the extension and retraction of the support leg 300 are more stable and smooth, and the positioning of the gear pin 304 and the gear hole K is more accurate.

As shown in fig. 22 to 23, at least one end of the shift plate 303 is bent to form a connection portion L, which is provided substantially in parallel outside one of end surfaces of the inner tube 302, and the connection portion L is connected to the end surface, thereby achieving the mounting of the shift plate 303. Preferably, both sides of the shift plate 303 are bent so that the cross section thereof is U-shaped, and the bent portions of both sides form the abutting portion D. When the gear plate 303 is mounted, the gear plate 303 is arranged in the groove C of the inner tube 302, the U-shaped opening direction of the gear plate 303 is consistent with the opening direction of the groove C, and the abutting parts D of the gear plate 303 abut against the two side walls of the groove C, so that the connection between the gear plate 303 and the inner tube 302 is enhanced, and the rigid support of the gear plate 303 to the inner tube 302 is also enhanced.

Preferably, the connection portion L abuts against an end surface of the inner tube 302 and is connected by a screw assembly. Further, both ends of the gear plate 303 are bent to form connection portions L, and the two connection portions L abut against both ends of the inner tube 302 and clamp the inner tube 302 therebetween, so that the gear plate 303 is further connected with the inner tube 302, and the longitudinal support of the inner tube 302 by the gear plate 303 is enhanced.

As a specific embodiment of the gear pin 304, as shown in fig. 15, 18 and 20, an actuator 305 for controlling the gear pin 304 is further disposed on the support leg 300 in this embodiment. The actuator 305 is centrally and laterally journalled to the outer tube 301 such that it may be seesaw rotated within the outer tube 301. The gear pin 304 is disposed at one end of the actuator 305, the other end of the actuator 305 is a force application end, and when the force application end of the actuator 305 is pressed, the actuator 305 rotates to drive the gear pin 304 to extend into or separate from the gear hole K.

It will be appreciated that as shown in fig. 21, the side of the outer tube 301 facing the gear plate 303 is provided with a through hole E through which a gear pin 304 extends into the inner cavity of the outer tube 301, enabling engagement with the gear plate 303.

As shown in fig. 21, 25-27, the actuator 305 includes a metal plate 51 and an operable key 52 fixed to one end of the metal plate 51, and a shift pin 304 is connected to the end remote from the key 52, and the key 52 is a plastic member. The key 52 has a connecting shaft F on both sides of the inner end thereof, and the connecting shaft F is movably connected to the outer tube 301, so that the actuator 305 can be rotated. The keys 52 expose the outer surface of the housing for ease of operation.

As shown in fig. 13, 15, 21, the outer tube 301 is provided with a mounting groove Y accommodating the actuator 305 and the shift pin 304, and the outer side of the mounting groove Y is opened, and is closed by a openable and closable lid 307, and the key 52 is exposed to the outer surface of the lid 307. It will be readily appreciated that the provision of the cover 307 facilitates assembly and maintenance of the actuator 305 and the shift pin 304.

As shown in fig. 24, the gear pin 304 includes a cylindrical positioning portion 41 matching with the gear hole K and a clamping head 42 at one end of the cylindrical positioning portion 41, one end of the metal plate 51 away from the plastic member is provided with a notch Q for penetrating the gear pin 304, and the size of the notch Q is larger than that of the cylindrical positioning portion 41 and smaller than that of the clamping head 42, so that the end of the gear pin 304 is limited outside the notch Q, thereby realizing connection between the executing member 305 and the gear pin 304.

In actual use, as shown in fig. 19-20, when the key 52 is pressed inward, the end of the metal plate 51 to which the shift pin 304 is attached is tilted, so that the shift pin 304 is separated from the shift hole K. 17-18, when the key 52 is released, the end of the sheet metal piece 51 to which the shift pin 304 is attached drops, causing the shift pin 304 to extend into the shift hole K.

As shown in fig. 18, 20 and 21, preferably, an elastic member 308 is further provided between the shift pin 304 and the outer tube 301, and when the force application end of the actuator 305 is pressed, the end of the metal plate member 51 to which the shift pin 304 is connected is lifted, and the elastic member 308 is deformed by pressing to store energy. When the actuator 305 is released, the elastic member 308 returns to deform to generate a reverse force, and the sheet metal member 51 is driven to rotate in the reverse direction, so that the shift pin 304 automatically falls into the shift hole K. Preferably, the elastic member 308 is a spring.

Preferably, as shown in fig. 21 and 28, a supporting frame 306 for installing an executing piece 305 is arranged in the installation groove Y, the supporting frame 306 is in a U-shaped structure, the U-shaped structure comprises two supporting walls 61 and a connecting wall 62 for connecting the two supporting walls 61, wherein the two supporting walls 61 of the U-shaped structure are respectively positioned at two opposite sides of the inner tube 302, the supporting walls 61 are bent and screwed in the installation groove Y, and the connecting wall 62 of the U-shaped structure is mutually propped against the bottom of the installation groove Y of the outer tube 301. A recess W is formed between the support wall 61 and the connection wall 62, and the actuator 305 is located in the recess W. The support wall 61 is provided with a shaft hole H, and the connecting shaft F of the actuator 305 is inserted into the shaft hole H.

Preferably, as shown in fig. 24, 18, 20 and 21, the snap-fit joint 42 of the gear pin 304 is provided with a socket 43 which can be sleeved by one end of the spring, the cover 307 is provided with a concave hole into which the other end of the spring can be inserted, and the spring is mounted through the socket 43 and the concave hole. The cover 307 is provided with an outwardly protruding boss a formed outwardly of a recess hole provided with a spring.

The working procedure of the gear type extension and retraction of the supporting leg 300 in this embodiment is as follows:

in the initial state, the gear pin 304 sequentially passes through the through hole on the outer tube 301 and any gear hole K on the gear plate 303 on the inner tube 302, and the gear pin 304 is engaged with the gear hole K, so that the inner tube 302 cannot slide relative to the outer tube 301.

As shown in fig. 19-20, pressing the key 52 causes the force application end of the actuator 305 to approach the inner tube 302, the end of the connecting shift pin 304 to tilt away from the inner tube 302, the spring is compressed, the shift pin 304 is separated from the shift hole K, and the inner tube 302 can slide relative to the outer tube 301.

17-18, when the inner tube 302 is pulled to adjust the support leg 300 to a desired length, the key 52 is released, the spring is reset, the actuator 305 is reversely rotated, and one end of the connecting gear pin 304 is close to the inner tube 302, so that the gear pin 304 passes through the through hole to be engaged with the gear hole K on the gear plate 303 at the corresponding position, and at this time, the outer tube 301 and the inner tube 302 are locked and cannot slide.

The present embodiment also provides a specific assembly of the support leg 300 and the base 200.

As shown in fig. 1 to 6, the bottom surface J of the base 200 has an inwardly recessed receiving groove R extending forward and backward to the front edge of the base 200, thereby forming an opening penetrating the receiving groove R at the front edge of the base 200. The front of the base 200 is provided with a movable coupling seat 400, and the movable coupling seat 400 can move in a limited manner in the front-rear direction of the base 200 to extend or retract from the front edge of the base 200.

Preferably, the base includes an upper housing and a lower housing, which enclose a receiving space, and the movable connection seat 400 is disposed in the receiving space and moves back and forth in the receiving space.

As shown in fig. 4 to 7 and 9, the upper ends of the support legs 300 are hinged to the movable connection base 400 and move along with the traction thereof, and the support legs 300 are folded in the receiving grooves R or unfolded for supporting by rotating about the hinge points with respect to the base 200. The rear section of the accommodating groove R is provided with a limiting mechanism G for limiting the rotation of the support leg 300 in the folded state to be separated from the accommodating groove R.

It should be understood that the swing link 400 of the hinge support leg 300 in this embodiment can move limitedly in the front-rear direction of the base 200 to extend or retract from the front edge of the base 200.

Accordingly, as shown in fig. 1, 2, and 9, when the support leg 300 is required to support the vehicle floor, the swing link 400 can be pulled forward beyond the front edge of the base 200, and the support leg 300 is unfolded so that the lower end of the support leg 300 abuts the vehicle floor.

As shown in fig. 3 to 7, when the support leg 300 is not required, the support leg 300 can be folded in the storage slot and the movable connecting seat 400 is retracted inwards, so that the size of the front and rear sides of the seat is reduced, the movable connecting seat 400 is prevented from reducing the leg movement space of the child, the legs of the child sitting on the seat can move freely, and the riding comfort is improved.

When the limiting mechanism G is locked, the supporting leg 300 can be kept at the folding position, so that the trouble of moving the supporting leg 300 away from the folding position during moving is avoided. When the limiting mechanism G is again operatively unlocked, the support leg 300 is released so that the support leg 300 can be switched from the collapsed position to the use position.

As shown in fig. 4 and 6, the depth of the receiving groove R of the base 200 is designed such that the outer surface of the supporting leg 300 in the folded state does not exceed the bottom surface J of the base 200, so that the child safety seat can be stably placed in the car seat when the supporting leg 300 is folded, thereby ensuring the stability of child safety. Meanwhile, the child safety seat can be stably placed on the storage platform, so that storage and storage are facilitated.

Preferably, when the limiting mechanism G limits the rotation of the support leg 300, the horizontal movement of the support leg 300 is not limited, i.e. the support leg 300 can move horizontally with the movable connection base 400.

When the movable connecting seat 400 is limited in front, the movable connecting seat 400 extends out of the front edge of the base 200, the supporting leg 300 is not limited by the limiting mechanism G, and the supporting leg 300 can be folded or unfolded. When the movable connecting seat 400 drives the support leg 300 in the folded state to move to the rear limit, the limit mechanism G limits the support leg 300 to rotate, so as to prevent the support leg 300 from falling off the folded position. At this time, the movable connection base 400 is moved forward, and the restriction of the support leg 300 by the restriction mechanism G is released, so that the support leg 300 can be unfolded again.

As shown in fig. 5, the present embodiment provides a specific arrangement mode of the limiting mechanism G. The limiting mechanism G includes a blocking portion 1 protruding from a circumferential side wall of the accommodating groove R, and the blocking portion 1 is blocked outside at least a portion of the support leg 300 in a contact manner to perform a limiting function. Preferably, the two blocking parts 1 are symmetrically disposed at both side walls of the receiving groove R, and when the folded support leg 300 moves backward, the rear section thereof is inserted between the two blocking parts 1, so that the blocking parts 1 block the support leg 300 from being turned over.

The blocking part 1 is disposed at the middle position of the side wall of the accommodating groove R, and the inner half part of the folded support leg 300 is positioned in the blocking part 1 and the outer half part is positioned outside the blocking part 1.

Further preferably, both side walls of the rear section of the support leg 300 include inclined surfaces 2 near the outer surface, and the outer diameter of the inclined surface 2 where the rear section of the support leg 300 is disposed is reduced from inside to outside, so that the rear section of the support leg 300 is inserted between the two blocking portions 1 and is limited by the blocking portions 1, and positioning and guiding effects are also provided for the rearward movement of the support leg 300, so as to avoid offset jamming during the movement.

As shown in fig. 7 to 11, the base 200 of the present embodiment is further provided with a positioning member 3 for locking the movable connection base 400 to move back and forth. The movable connecting seat 400 is provided with a positioning hole 4 matched with the positioning piece 3, the upper surface of the base 200 is provided with a control button 500, and the control button 500 is operable to control the movement of the positioning piece 3 and enable the positioning piece 3 to be inserted into or withdrawn from the positioning hole 4 so as to release or lock the movement limit of the movable connecting seat 400.

The movable connecting seat 400 is limited in movement, so that the support structure is prevented from being damaged due to the forward and backward movement of the support legs 300 when supported on the vehicle bottom plate, the stability and the reliability of the support structure are improved, and the safety of the child safety seat is improved. And the manipulation button 500 is provided on the upper surface of the base 200, so that the manipulation of the positioning member 3 is more convenient.

Preferably, as shown in fig. 8 and 10, the positioning member 3 is provided along the height direction of the base 200, and can be moved up and down to be inserted into or withdrawn from the positioning hole 4 under the control of the manipulation button 500.

Preferably, the positioning member 3 is disposed below the positioning hole 4: when the manipulation button 500 is released, the positioning member 3 is inserted into the positioning hole 4 from the bottom up; when the manipulation button 500 is pressed, the positioning member 3 is withdrawn from the top down to the positioning hole 4.

As shown in fig. 7 to 10, the base 200 is provided with a guide rail 5, the movable connection is provided with a guide shaft 6 transversely erected on the guide rail 5, and the guide shaft 6 is guided to move on the guide rail 5 to realize the reciprocating movement of the movable connection seat 400.

Preferably, the guide rail 5 includes brackets 501 at both sides of the movable connection seat 400, on which two guide shafts 6 are respectively a front guide shaft 61 and a rear guide shaft 62, and the two guide rails 5 are parallel to each other with a gap therebetween, and the gap forms a positioning hole 4 for cooperation with the positioning member 3.

Preferably, the bracket 501 is symmetrically provided with a waist-shaped hole S extending in the front-rear direction, and both ends of the front guide shaft 61 and the rear guide shaft 62 are slidably inserted into the waist-shaped hole S in the front-rear direction, thereby guiding the movement of the swing link 400.

As shown in fig. 8, the upper end of the positioning member 3 is a slope inclined downward from front to back, and the front guide shaft 62 can slide along the slope to pass over the positioning member 3, so that the movable connection seat 400 moves forward. By the arrangement, a user does not need to press the control button 500 in the process of unfolding the supporting leg 300, only needs to stretch the movable connecting seat 400 forwards, and the linkage property, flexibility and convenience of operation actions are greatly improved.

As shown in fig. 11, the positioning member 3 is connected to the control button 500, and a longitudinally stretchable elastic member 7 is provided under the positioning member 3.

The elastic member 7 is used for resetting the positioning member 3, and when the manipulation button 500 is released, the elastic member 7 is elongated to press the positioning member 3 into the positioning hole 4. After the front guide shaft 62 passes over the positioning member through the inclined surface, the positioning member 3 can be inserted into the gap under the driving of the elastic member 7, thereby realizing positioning so as to ensure the stability of the supporting structure.

As shown in fig. 11, a connecting rod 8 is integrally formed on one side of the positioning member 3, the outer end of the connecting rod 8 is bent upwards, and an operation button 500 is sleeved at the outer end of the connecting rod.

As shown in fig. 29, preferably, the front side of the base is further provided with a relief opening V, and the relief opening extends from the inner cavity of the movable connecting seat 400 to the accommodating groove, so that the supporting leg 300 can be pushed to a rear limit along with the movable connecting seat 400 after being folded.

As shown in fig. 7 and 11, the swing joint 400 includes two parallel vertical wall connection frames 9, and the support leg 300 is movably connected to the swing joint 400 by a rotation shaft 10 crossing the connection frames 9.

As shown in fig. 12, the upper end of the supporting leg 300 has a bending portion N, and the bending portion is provided with a through-hole P. The rotation shaft 10 is inserted into the insertion hole P of the bending portion, and is exposed from the support leg 300 to be connected to the movable connection base 400.

As shown in fig. 10, 11 and 12, preferably, a limiting portion 31 is provided at the rear side of the hinged end of the supporting leg 300, and a limiting shaft 91 is provided on the connecting frame 9 and engaged with the limiting portion 31, and when the supporting leg 300 is unfolded, the limiting shaft 91 falls into the limiting portion 31 to limit the supporting leg 300 to be further unfolded in a direction away from the base 200. Thus, the accuracy of the unfolding position of the supporting leg 300 can be ensured, and the supporting leg 300 can be ensured to be more stable and reliable when being unfolded and unfolded relative to the base 200.

The specific principle and procedure of the support leg 300 of this embodiment are as follows:

as shown in fig. 6 to 8, in the first state, the support leg 300 is folded in the receiving groove R, the movable connection seat 400 is retracted into the base 200 to be positioned at the rear limit, and the rear section of the support leg 300 in the folded state is inserted into the blocking portion 1, and the rotation of the support leg 300 is restricted because it cannot be separated from the receiving groove R.

When the movable connecting seat 400 is subjected to forward acting force, the front guide shaft 61 slides along the inclined plane to pass over the positioning piece 3, so that the positioning piece is positioned between the front guide shaft 61 and the rear guide shaft 62, and the elastic part 7 resets to drive the positioning piece 3 to be inserted into the positioning holes 4 formed by the two guide shafts at intervals, so that the movable connecting seat 400 is limited to move forwards and backwards; at the same time, the rear section of the support leg 300 is separated from the blocking portion 1, so that the support leg 300 can be unfolded to the second state, being separated from the restriction of the restriction mechanism G.

As shown in fig. 9-10, in the second state, the supporting leg 300 forms an included angle with the base 200 of approximately 90 degrees, the movable connecting seat 400 extends out of the front edge of the base and is located at the front limit, and the limit shaft of the movable connecting seat 400 falls into the limit portion of the supporting leg 300, so that the unfolding angle of the supporting leg 300 is limited. At this time, as shown in fig. 1, the support leg 300 is stretched, and the support leg can be used for support according to the actual situation.

When the support leg is required to be folded, the support leg 300 is retracted and folded into the accommodating groove R, the control button 500 is pressed to enable the positioning piece 3 to be separated from the positioning hole 4, then the movable connecting seat 400 is pushed backwards to drive the support leg in the folded state to move backwards, when the support leg in the folded state moves to the rear limit along with the movable connecting seat, the rear section of the support leg 300 is inserted into the blocking part 1, at the moment, the movable connecting seat 400 is retracted into the base 200, and the support leg is positioned in the accommodating groove R.

The gear telescopic supporting leg and the child safety seat provided by the invention are described in detail, and specific examples are applied to illustrate the principle and the implementation of the invention, and the description of the examples is only used for helping to understand the invention and the core idea. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications fall within the scope of the claims of the present invention.

Claims

1. The child safety seat is characterized by comprising a base, a seat body and gear telescopic supporting legs;

the gear type telescopic supporting leg comprises a movable connecting seat, an outer pipe, an inner pipe, a gear plate and a gear pin;

the movable connecting seat comprises a connecting frame, the upper end of the outer tube is provided with a bending part, and the bending part is hinged with the movable connecting seat through a rotating shaft bridging the connecting frame;

the rear side of the outer tube hinged end is provided with a limiting part which is an arc-shaped groove, and the connecting frame is provided with a limiting shaft matched with the limiting part so as to limit the unfolding angle of the supporting leg;

the inner tube is slidably sleeved in the outer tube and can stretch from one end of the outer tube, a groove extending along the length direction is formed in one side of the inner tube, and a convex rib matched with the groove and capable of sliding along the groove is arranged on the inner wall of the outer tube;

the two ends of the gear plate are bent to form connecting parts, the two sides of the gear plate are bent to form abutting parts, and the section of the gear plate is U-shaped;

the U-shaped opening direction of the gear plate is consistent with the opening direction of the groove, and the gear plate extends in the groove along the length direction of the inner tube;

the connecting part is abutted against the two ends of the inner tube and clamps the inner tube between the two ends, and the abutting part is abutted against the two side walls of the groove;

the gear pin is arranged on the outer tube, the gear plate is provided with a plurality of gear holes which are longitudinally arranged, and the gear pin is operatively inserted into one of the gear holes to fix the relative positions of the inner tube and the outer tube, so that the length of the supporting leg can be adjusted in a gear manner;

the bottom surface of the base is provided with an inwards concave accommodating groove, and the supporting legs can move in a limiting way along the front-back direction of the base along with the movable connecting seat;

the base is provided with a guide rail, the movable connection is provided with a front guide shaft and a rear guide shaft which are transversely erected on the guide rail, the two guide rails are parallel to each other and are separated by a gap, and the gap forms a positioning hole;

the base is provided with a positioning piece which can be inserted into or withdrawn from the positioning hole, and the positioning piece releases and locks the movement limit of the movable connecting seat;

the upper end of the positioning piece is a slope inclined downwards from front to back, and the front guide shaft can slide along the slope to pass over the positioning piece.

2. The child safety seat according to claim 1, wherein: the inner tube is an aluminum die casting, and the gear plate is made of iron or steel.

3. The child safety seat according to claim 1, wherein: the outer tube is positioned at the upper end, and the inner tube extends out from the lower end of the outer tube for supporting the vehicle floor.

4. The child safety seat according to claim 1, wherein: the inner tube be equipped with along the recess of length direction extension, the gear board locate in the recess.

5. The child safety seat according to claim 4, wherein: the outer tube is provided with a convex rib matched with the groove, and the convex rib slides in the groove to play a guiding role.

6. The child safety seat according to claim 4, wherein: at least one end of the gear plate is bent to form a connecting part, and the connecting part is connected to the end face of the inner tube.

7. The child safety seat according to claim 6, wherein: the connecting part is connected with the end face of the inner pipe through a screw assembly.

8. The child safety seat according to claim 1, wherein: the gear type telescopic supporting leg further comprises an executing piece for controlling the gear pin, the middle of the executing piece is rotatably connected into the outer tube, and the gear pin is arranged at one end of the executing piece; pressing the other end of the actuating member can rotate the actuating member, so that the gear pin extends into or is separated from the gear hole.

9. The child safety seat according to claim 8, wherein: the outer tube is provided with a mounting groove for accommodating the executing piece and the gear pin, the mounting groove is closed by a cover body, the pressing end of the executing piece is provided with a key which can be operated, and the key is exposed out of the outer surface of the cover body.