TW202144663A - Hinge device and machines with the same - Google Patents

Abstract

This invention provides a hinge device with a simple structure that can be opened and flattened, and various machines equipped with the hinge device. The hinge device can prevent a manuscript pressing plate from falling sharply when closing, and allows users to obtain a smooth operation experience. The hinge device includes: an installation member, which is installed on the machine main body; a support member, which is installed on the manuscript pressing plate, and is composed of a shaft portion and a supporting portion; a hinge shaft, which rotatably connects the shaft portion of the support member between a pair of side plates of the installation member; a sliding member, which is slidably received in an accommodating portion, and is provided with a slider cam protrusion on the top thereof; an elastic member, which is arranged between the bottom of the accommodating portion and the sliding member; a damper, which is arranged in the elastic member; and a push rod, which is slidably received in a guiding cylinder tube.

Description

Hinged device and various machines equipped with the same

The present invention relates to a preferred hinge device and various machines equipped with the hinge device, especially for photocopiers such as copiers or multi-type photocopiers or office machines such as printing presses, or the machine body of various machines including furniture and the like It is also suitable for covers that need to be opened and closed, such as the original press plate.

Conventionally, a hinge device and a photocopier equipped with the hinge device include the following components: a mounting member, which is mounted on a machine body such as a photocopier, and a support member, which is rotatably mounted on the mounting member through a hinge shaft The upper part is used to support the original pressing plate; the accommodating part arranged on the mounting member accommodates the sliding member that exerts force toward the one-way sliding; the first rotating cam part arranged on the supporting member abuts against the first sliding member arranged on the top of the sliding member At the same time as the cam portion, the damper will be retracted inside the sliding member; the piston rod of this damper is connected to the push rod, the top of the push rod has a second sliding cam portion; the push rod is provided from the top of the sliding member. The opening portion protrudes toward the first rotation cam portion side; the above-mentioned hinge device structure and the like have been conventionally described in Japanese Patent Laid-Open No. 2015-183840.

The hinge device described in the above-mentioned Laid-Open Patent Publication has too many structural parts and high manufacturing cost, and another problem is that in the closing operation of the original pressing plate, the descending distance of the pressing rod due to the first rotating cam portion is longer than the same. The distance of the sliding member lowered by the first rotating cam portion is large, and due to this structure, when the user performs the closing operation of the document pressing plate, the user may experience a strange feeling of operation. In addition, since the push rod simply abuts on the upper part of the piston rod, and the length of the guide hole of the push rod formed in the sliding member in the axial direction is short, the sliding action of the push rod is difficult to perform smoothly; In particular, when the user operates the original pressing plate to close, there will be a strange feeling in operation, and at the same time, between the push rod and the guide hole, it will also cause the problem of unsmooth grid due to years of use.

The purpose of the present invention is to provide a hinge device that solves the above problems and various machines equipped with the hinge device; the hinge device of the present invention has a simpler structure and a relatively low cost, which not only allows the user to obtain a smooth operating experience, even after a long period of time. Using its superior durability will also not result in irregularities.

In order to achieve the above objects, the features of the hinge device of the present invention include: a mounting member, which is mounted on the side of the machine body, the upper part has a pair of side plates and is provided with a receiving portion that opens upward; a supporting member, which is It is installed on the original pressing plate, and consists of a fulcrum part and a supporting part. The fulcrum part has a first rotating cam part; a hinge shaft is connected to the fulcrum part of the supporting member in a rotatable manner Between a pair of side plates of the member; a sliding member, which is slidably received into the receiving portion, and has a slider cam protruding portion on the top, and the slider cam protruding portion and the first rotating cam portion are constantly pressed The connected state; an elastic member, which is arranged between the bottom of the receiving portion and the sliding member, and makes the sliding member exert force toward the side of the first rotating cam portion; a damper, which is arranged in the elastic member ; and a push rod, which is abutted against the first rotating cam portion at a predetermined closing angle when the original press platen performs a closing action, and is slidably accommodated in a guide cylinder portion formed on the sliding member There is an opening in the upper part, and at the same time, one end of the push rod is connected with the piston rod of the damper; when the original pressing plate is closed from a predetermined opening angle, the sliding member is pressed by the first rotating cam part. The moving distance is longer than the moving distance of the push rod.

As mentioned above, the feature of the hinge device of the present invention is that the length of the guide cylinder portion is substantially the same as the length of the push rod.

Furthermore, the feature of the hinge device of the present invention is that when the front end of the piston rod is connected to the push rod, the front end of the piston rod needs to be inserted into the connection hole provided on the lower end side of the push rod.

In addition, the hinge device of the present invention is characterized in that when the front end of the piston rod is connected to the push rod, the front end side of the piston rod and the lower end side of the push rod are connected by a pin, and the pin is connected to the push rod. Penetrates radially.

In addition, the hinge device of the present invention is characterized in that the first rotating cam portion and the second rotating cam portion disposed on the support shaft portion sandwich the hinge shaft and abut against the top of the sliding member to limit the maximum rotation of the support member. angle.

In addition, various machines related to the present invention include the above-mentioned hinge device, the machine body and the manuscript pressing plate; the machine body has a placing surface for placing manuscripts; the manuscript pressing plate is in a closed state to press the pendulum The original placed on the placement surface changes between closed and open states with respect to the placement surface by rotating simultaneously with the support member.

In the present invention, the hinge device not only has a simple structure, but also can prevent the original lamination plate from falling sharply, and also allows the user to have a smooth opening and closing operation experience.

In the present invention, when the original pressing plate is opened and closed, even if the pressing rod is subjected to the force of shaking in the front and rear directions from the first rotating cam portion, the length of the guide cylinder portion is approximately equal to the length of the pressing rod, so that the push rod can be pushed. The lever can maintain a smooth sliding action, so even if it is used for many years, there will be no irregularities, and the durability is excellent.

In the present invention, the piston rod and the push rod are not only connected reliably and move stably, but also the push rod can be replaced according to the machine type, that is, a hinge device can be applied to various types of business machines.

In the present invention, the hinge device can maintain the stability of the fully opened state of the original pressing plate when the original pressing plate is in a fully opened state of less than 90°.

Various machines of the present invention use the hinge device having the above-mentioned characteristics.

The preferred embodiment of the hinge device of the present invention used in a photocopier will be described below with reference to the drawings. The photocopier cover in this description is the original platen, and the word “original platen” is used instead of the cover in the description; in other machines, the word “original platen” can be replaced by the cover. In addition, the following description will use and refer to the front-rear, left-right, and up-down directions marked in the rectangular coordinate system shown in FIG. 2 as appropriate.

(Embodiment 1) The photocopier 1 shown in FIG. 1 is provided with a placement surface 2a. The placement surface 2a is provided on the upper surface 2b of the machine body 2, and is made of contact glass for placing originals. The photocopier 1 can read the originals placed on the placement surface 2a, and can be, for example, a copier with only a photocopying function, or a multi-functional photocopier with multiple functions such as photocopying, scanning, and faxing. The photocopier 1 includes a machine body 2 , a document pressing plate 3 serving as a cover of the photocopier, and hinge devices 10 and 10 . The hinge devices 10 and 10 are arranged on the machine body 2 and support the document pressing plate 3 in a rotatable manner. .

Although the structures of the hinge devices 10 and 10 shown in the embodiments of the present invention are the same, in fact, it is not limited to this, and the left and the right may have different structures. Since the hinge devices 10 and 10 in the embodiment of the present invention have the same structure, the following description will use the structure of one of the hinge devices 10 for description.

As shown in the drawings after FIG. 2 , the hinge device 10 includes a mounting member 20 and a support member 30 , the mounting member 20 has a columnar column portion 21 , and the support member 30 is rotatably provided through a hinge shaft 80 . on the mounting member 20 . The mounting member 20 is a plastic injection product, which can be made of a material with mechanical strength such as polypropylene (PP). The mounting member 20 can be attached to the machine body 2 . The depth of this attachment hole 2c is the same as the height of the support|pillar part 21. As shown in FIG. Furthermore, the protrusion indicated by the indication mark 21a is a guide protrusion, which is disposed at the rear end of the lower end of the pillar portion 21; when the pillar portion 21 is inserted into the mounting hole 2c, the guide protrusion 21a will fit into the rear end portion of the pillar portion 21. The guide groove of the mounting hole 2c prevents loosening and can always be fixed in the inserted position. However, the structure of the mounting member 20 is not limited to the one shown in the embodiment, and another embodiment may also be that the pillar portion 21 is designed as an angle cylinder, and mounting plates are installed on both sides, and then the mounting plates are assembled into the upper rear end of the machine body 2 .

The original pressing plate 3 presses the original placed on the placing surface 2a of the photocopier 1 downward from above, so it can suppress wrinkles or prevent the original from moving when the machine reads the original. As described above, the document pressing plate 3 that presses the document is called a closed state at this time, and covers the placing surface 2 a of the machine body 2 . On the other hand, when a document is placed on the placement surface 2 a of the photocopier 1 , the user lifts the closed document pressing plate 3 upward to expose the placement surface 2 a of the machine body 2 . At this time, the original pressing plate is in an open state.

In addition, the state of the hinge device 10 attached to the document pressing plate 3 is also the same as that of the document pressing plate 3, and the description thereof is the same as above. That is, as shown in FIG. 3 , when the document pressing plate 3 is in the closed state, the hinge device 10 is also in the closed state, and the rotation angle of the support member 30 relative to the machine body 2 is 0°. In addition, when the document pressing plate 3 is in an open state, the hinge device 10 is also in an open state. When the support member 30 is rotated from the placing surface 2a of the machine body 2 in the direction away from 70°, for the hinge device 10 of the present invention, the rotation angle of 70° is the maximum opening angle of the original pressing plate 3 .

As shown in the figures after FIG. 3 , the support portion 21 of the mounting member 20 is provided with a storage portion 22 for storing various components described later; the upper portion of the storage portion is open, and the bottom portion 22a is provided below. In addition, the index mark 22b provided in the bottom part 22a is a hole for exhaust.

Furthermore, as shown in FIG. 2 , the upper part of the mounting member 20 is provided with a pair of side plates 23 and 23 . The pair of side plates 23 , 23 are respectively formed with shaft insertion holes 23 a , 23 a (only one side is shown in the figure, and the drawings after FIG. 2 are the same) for allowing the hinge shaft 80 to pass through. The hinge shaft 80 passes through the shaft insertion holes 23 a and 23 a on the pair of side plates 23 and 23 and the shaft insertion holes 31 a provided in the fulcrum portion 31 of the support member 30 . With this arrangement, the support member 30 is rotated about the hinge shaft 80 . In addition, a part of the stopper at the point indicated by the index mark 24 is formed on the rear portion of the attachment member 20 across the left-right direction. In this embodiment, the stop portion 24 is used to prevent the support member from rotating more than 70°.

The support member 30 is also a plastic injection product, which can be made of a material with mechanical strength such as polypropylene (PP), as shown in the drawings after FIG. 31 is formed by a support portion 32 extending forward; the support member 30 is provided with a recessed portion 31d, and the recessed portion 31d is located below the shaft insertion hole 31a provided in the fulcrum portion 31, sandwiched between the first rotating cam portion 31b and the second rotating cam Between the parts 31c, the first rotating cam part 31b and the second rotating cam part 31c are asymmetrical when viewed from the axial direction.

The support member 30 and the mounting member 20 are in a connected state, and as shown in the figures after FIG. 23 , 23 , that is, inserted between the pair of side plates 23 , 23 , and further connect the support member 30 and the mounting member 20 . In addition, as shown in the drawings after FIG. 3 , the first rotating cam portion 31 b contacts or pushes the sliding member 40 , the pressing lever 70 and the stopper portion 24 according to different rotational angles of the supporting member 30 with the hinge shaft 80 as the center. .

The support portion 32 is mounted on the rear of the original press plate 3 through the mounting holes 32a, 32a, . The width in the left-right direction of the support portion 32 is wider than that of the support shaft portion 31 . With this arrangement, the support portion 32 can be connected to the original platen 3 in a wide range, and supports the original platen 3 to maintain a stable state. Therefore, the document pressing plate 3 operated by the user rotates around the hinge shaft 80 together with the support member 30 .

In addition, as shown in the drawings after FIG. 3 , inside the receiving portion 22 provided in the mounting member 20, a sliding member 40 and an elastic member 50 are installed; The elastic member 50 is composed of a compression coil spring, which is elastically installed between the sliding member 40 and the pressure-receiving base member 61 , and the pressure-receiving base member 61 is disposed on the bottom portion 22 a.

3 and subsequent drawings, the sliding member 40 has an outer cylinder portion 41, a guide cylinder portion 42, and a top portion 43; the outer cylinder portion 41 is formed into a cylinder shape, and the guide cylinder portion 42 is provided in the outer cylinder The inner side of the outer cylindrical portion 41 is formed into a concentric cylindrical shape, and the top portion 43 connects the upper end of the outer cylindrical portion 41 and the upper end of the guiding cylindrical portion 42 . The height of the outer cylinder portion 41 is lower than the depth of the housing portion 22 , and the height of the guide cylinder portion 42 is also lower than the height of the outer cylinder portion 41 . When the outer cylindrical portion 41 is cut with a plane perpendicular to the vertical direction, the outer shape of the cross-section is a circle, and the outer diameter of the outer shape is equal to the inner diameter of the accommodating portion 22 provided in the mounting member 20 . With this arrangement, the sliding member 40 can be slidably displaced in the up-down direction in the accommodating portion 22 . In addition, a portion of the front side above the top portion 43 is provided with a mountain-shaped and upwardly protruding slider cam protrusion 43a. The inclined portion 43b of the slider cam convex portion 43a and the flat portion 43c following the inclined portion 43b are also formed on the top portion 43 at the same time.

The elastic member 50 is formed as a cylindrical compression coil spring, the upper part of which is accommodated in the elastic member accommodating portion 40a, and the elastic member accommodating portion 40a is divided by the outer cylindrical portion 41 , the guiding cylindrical portion 42 and the top portion 43 of the sliding member 40 . divided into. The end of the upper side of the elastic member 50 abuts against the lower side of the top portion 43 of the sliding member 40 . In addition, the lower end of the elastic member 50 abuts against the pressure-receiving base member 61 , and the pressure-receiving base member 61 is attached to the bottom portion 22 a of the accommodating portion 22 . As described above, the elastic member 50 is elastically installed between the sliding member 40 and the pressure-receiving base member 61 , and the pressure-receiving base member 61 is located at the bottom 22 a of the accommodating portion 22 . Furthermore, since the elastic member 50 is received in the accommodating portion 22 in a compressed state, the sliding member 40 is constantly urged upward, that is, the sliding member 40 faces the first rotating cam portion 31b side. The sliding member 40 that urges the first rotating cam portion 31b pushes the first rotating cam portion 31b upward through the slider cam convex portion 43a. As shown in FIG. 3 , the position where the slider cam convex portion 43a pushes the first rotation cam portion 31b upward is slightly forward of the position where the hinge shaft 80 is located. Therefore, when the hinge device 10 is in the closed state, the force of the sliding member 40 will cause the supporting member 30 to rotate in the opening direction, that is, the supporting member 30 is rotated clockwise as shown in FIG. When the opening and closing angle of the document pressing plate 3 is shown as 0°, since the elastic force of the sliding member 40 is smaller than the rotational torque generated around the hinge shaft 80 by the document pressing plate 3, the document pressing plate 3 will not be affected by vibration or the like. Floating up by itself.

Furthermore, a damper 60 and a push rod 70 are further accommodated in the accommodating portion 22 of the mounting member 20; the damper 60 has a piston rod 60a, and the push rod 70 is connected to the piston rod 60a.

The damper 60 is mounted on the pressure-receiving base member 61 in order to push up the piston rod 60 a upward, and is accommodated in the elastic member 50 at the same time. The oil and piston disposed inside the damper 60 are not shown in the figures. Although the damper 60 in this embodiment is a fluid damper, the oil encapsulated therein can also be replaced by gas.

The push rod 70 is formed into a cylindrical shape, and its upper end is provided with an inclined cam portion 70a inclined forward, which can slide in the upward and downward direction inside the insertion hole 40b of the guide cylinder portion 42 provided in the sliding member 40 and be accommodated in the upper end. in. The inner diameter of the insertion hole 40b of the guide cylinder portion 42 is equal to the outer diameter of the push rod 70, and the piston rod 60a is inserted into the connecting hole 70b provided in the axial direction from the lower part of the push rod 70. In this embodiment, the piston rod 60a and the push rod 70 are connected by pins 60b penetrating the radial directions. However, since the push rod 70 is accommodated in the insertion hole 40b of the guide cylinder portion 42, the insertion hole 40b is The length is approximately equal to that of the push rod 70 , so that the push rod 70 can remain stable even if the push rod 70 is subjected to the force of the first rotating cam portion 31b swaying back and forth along with the opening and closing operation of the document pressing plate 3 . Therefore, it is only necessary to insert the front end side of the piston rod 60a into the connection hole 70b provided in the lower part of the push rod 70 . At this time, in order to prevent the push rod 70 from rotating in use, the push rod 70 must be designed in a quadrangular shape or provided with a guide protrusion. When the original pressing plate 3 is in the closed state as shown in FIG. 3 , the inclined cam portion 70a at the upper end of the push rod 70 will protrude upward from the opening portion 42a of the guide cylinder portion 42 and abut against the first rotating cam portion 31b, wherein The opening portion 42 a of the guide cylindrical portion 42 is provided at the top of the sliding member 40 .

Next, the feature of the hinge device 10 of the present invention is that it acts when the document pressing plate 3 is closed from the open state. Therefore, the hinge device 10 will be described next with reference to FIGS. 3 to 8 when the document pressing plate 3 is opened from the open state. The action that occurs during the transition to the closed state. Furthermore, in order to make the operation of the hinge device 10 easier to understand, the machine body 2 and the document pressing plate 3 in FIG. 3 to FIG. 7 are shown with two-dot lock lines.

When the user wants to open the original press plate, the elastic force of the elastic member used in the hinge device of the general photocopier will only make the user feel the weight of the original press plate to open it, and the original press plate can be stably stopped at the middle opening and closing angle. ; And at the time of closing, in order to prevent the original pressing plate from closing abruptly and further stabilize its closed state so that it does not float upward, the elastic force setting of the elastic member will be smaller than the rotating torque, which is the original pressing plate when it is closed. The rotational torque generated around the hinge shaft. Therefore, it is necessary to prevent the document pressing plate 3 from closing abruptly and making a loud noise due to the inertial force generated when closing, or causing the user to accidentally pinch the hand. In order to achieve the above-mentioned purpose, in addition to using the elastic member, the present invention also uses a damper as another buffer device, but it is necessary to make arrangements to make the damper work in which stage.

FIG. 3 shows a state in which the angle of the hinge device 10 is 0°. This 0° state is the state in which the support member 30 and the original press platen 3 are relative to the original placement surface 2a of the machine body 2; FIG. 4 shows the hinge device 10 When the rotation angle is 70°, the rotation angle is the angle of the support member 30 and the original platen 3 relative to the original placement surface 2a of the machine body 2 , and 70° is the maximum opening angle of the original platen 3 . As shown in FIG. 4 , at this time, the first rotating cam portion 31 b and the second rotating cam portion 31 c of the supporting member 30 will sandwich the hinge shaft 80 and abut the slider cam convex portion 43 a provided on the top of the sliding member 40 and the hinge shaft 80 . The flat portion 43c at the rear; through this arrangement, the support member 30 will not be rotated in any direction to exert force, so even if the user's hand does not hold the original platen, the original platen can be stably stopped and opened. Angle 70° without opening and closing in either direction.

Furthermore, the slider cam protruding portion 43a abuts on the first rotating cam portion 31b, and the slider cam protruding portion 43a is provided on the sliding member 40 which is urged upward through the elastic member 50 . The force of the slider cam convex portion 43a causes the support member 30 to rotate in the opening direction by pushing the first rotating cam portion 31b upward. On the other hand, due to the weight of the document pressing plate 3 shown in FIG. 1 , the supporting member 30 must bear the force of the rotation of the document pressing plate 3 in the closing direction. In addition, if the rotation angle of the support member 30 is large, for example, the rotation angle of the support member 30 exceeds 30°, the force of the support member 30 being pushed by the slider cam protrusion 43a to rotate in the opening direction will be different from the force of the original pressing plate 3 . The torque in the closing direction is balanced against the weight. Therefore, as long as the user does not try to move the original pressing plate 3 (FIG. 1), the rotation angle of the hinge device 10 shown in FIG. 3 can be maintained. Also, as shown in FIG. 6 , when the opening and closing angle of the document pressing plate 3 and the support member 30 is 20°, the position of the inclined cam portion 70 a of the push rod 70 is retracted below the guide cylinder portion 42 of the slide member 40 . , and does not come into contact with the first rotating cam portion 31b.

As shown in FIG. 4 , when the user presses the document pressing plate 3 in the fully open state in the closing direction, the first rotating cam portion 31b presses the slider cam convex portion 43a downward, and the sliding member 40 also So pressed and moved down. On the other hand, when the document pressing plate 3 is moved from the fully open position to the position where the opening and closing angle is 15° as shown in FIG. The cam portion 31b abuts against, and therefore does not perform any action. Then, as shown in FIG. 7 , that is, when the rotation angle of the hinge device 10 is 15°, the first rotating cam portion 31b will be connected with the inclined cam portion 70a of the push rod 70, and through this connection, the push rod 70 will As the opening and closing angle decreases and slides downward, the damper 60 and the compressed elastic member 50 play a stronger role due to the lowering of the push rod 70 to buffer the falling speed of the document pressing plate 3 .

With the above structure, if the rotation angle of the support member 30 of the hinge device 10 and the opening and closing angle of the document pressing plate 3 are greater than 15° and less than 70°, the first rotating cam portion 31b will abut against the elastic member 50 upward. The slider cam convex portion 43 a of the sliding member 40 that is biased does not abut against the inclined cam portion 70 a of the push lever 70 . Therefore, the hinge device 10 of the present invention will be shown in the torque curve diagram of FIG. 8 , when the closing angle of the original pressing plate 3 relative to the placing surface 2a of the machine body 2 is 15°, the original pressing plate 3 is mostly its own. Due to the weight and inertial force during closing, the action starts from the closing angle that can be automatically closed, so that the user will not feel strange in operation and can smoothly close the original platen, and at the same time, it can also prevent the original platen 3 from closing abruptly. .

The above content can be understood and verified only by comparing FIG. 4 and FIG. 3 . During the movement of the manuscript pressing plate 3 of the present invention from the fully open 70° position to the fully closed 0° position, the slider cam of the sliding member 40 protrudes. The moving width of the portion 43 a after being pressed by the first rotating cam portion 31 b is longer than the moving width of the inclined cam portion 70 a of the push lever 70 .

FIG. 8 is a torque curve diagram of the hinge device 10 of the present invention. As shown in the figure, when the opening and closing angle is between 15° and 20°, the torque curve shown by the original pressing plate 3 intersects the torque curve of the elastic device 50; The elastic force of the original is the upper hand, and the original pressing plate 3 will not fall by itself, so the user only needs a little force to operate and open, and the original pressing plate 3 will not fall down when the user lets go. If the opening and closing angle is below the angle at which the torque curve shown by the original pressing plate 3 intersects the torque curve of the elastic device 50, since the gravity of the original pressing plate 3 prevails, when the user lets go, the original pressing plate 3 will However, as shown in the figure, the damper 60 will start to act at this opening and closing angle, so the descending speed of the document pressing plate 3 will be buffered.

The present invention is not limited to the above-mentioned embodiments, and can also have various changes and applications. In the above embodiment, although the maximum opening angle of the support member 30 relative to the machine body 2 has been set at 70°, it is not limited to this, and the angle can be set arbitrarily. In addition, when the rotation angle of the support member 30 is 15° or less, since the first rotation cam portion 31 b provided on the support member abuts against the pressing rod 70 of the connection damper 60 , when the closing operation of the document pressing plate 3 is performed After the rotational torque is increased to a considerable extent, the acceleration of the document pressing plate 3 when closed is absorbed by the action of the damper 60, so that the document pressing plate 3 will not drop rapidly, and the user can also smoothly perform the closing operation.

In addition, the hinge device 10 of the present invention is not only suitable for the photocopier 1, but also suitable for various items using the hinge device 10, such as printing presses, boxed containers, and kitchen cabinets and other furniture. The usage is as described above. described.

The structure of the present invention has been described above, and the hinge device is particularly suitable for opening and closing of a relatively light-weight original lamination plate with high opening and closing frequency, as well as a photocopier equipped with the hinge device; however, as described above, the application of the present invention is not Limited to this, it is also applicable to the hinge device for double-piece opening and closing of various machines with the same purpose, as well as various machines equipped with this hinge device.

1: Photocopier 2: Machine body 2a: Placement surface 2b: upper surface 2c: Mounting holes 3: Original plywood 10: Hinged device 20: Installation components 21: Pillar 21a: Guide bump 22: Storage Department 22a: Bottom 22b: Holes for exhaust 23: Side panels 23a: Shaft jack 24: Stopper 30: Support member 31: Pivot part 31a: Shaft jack 31b: The first rotating cam part 31c: The second rotating cam 31d: Recess 32: Support part 32a: Mounting holes 40: Sliding member 40a: elastic member storage part 40b: jack 41: Outer cylinder 42: Guide barrel 42a: Opening 43: Top 43a: Slider cam protrusion 43b: inclined part 43c: Flat part 50: Elastic member 60: Damper 60a: Piston rod 60b: pin 61: Compressed base member 70: Push rod 70a: Inclined cam 70b: Connection hole 80: hinge shaft

FIG. 1 is a perspective view of a photocopier as one example of various machines to which the hinge device of the present invention is installed. FIG. 2 is a perspective view of the hinge device of the present invention alone. FIG. 3 is a longitudinal cross-sectional view of the hinge device shown in FIG. 2 in a state where the rotation angle of the support member is 0°. FIG. 4 is a longitudinal cross-sectional view of the hinge device shown in FIG. 3 in a state where the rotation angle of the support member is 70°. FIG. 5 is a longitudinal cross-sectional view of the hinge device shown in FIG. 3 in a state where the rotation angle of the support member is 35°. FIG. 6 is a longitudinal cross-sectional view of the hinge device shown in FIG. 3 in a state where the rotation angle of the support member is 20°. FIG. 7 is a longitudinal cross-sectional view of the hinge device shown in FIG. 3 in a state where the rotation angle of the support member is 15°. FIG. 8 is a torque curve diagram of the hinge device shown in FIG. 3 when the rotation angle of the support member ranges from 0° to 70°.

1: Photocopier

2: Machine body

2a: Placement surface

2c: Mounting holes

3: Original plywood

10: Hinged device

20: Installation components

21: Pillar

21a: Guide bump

22: Storage Department

22a: Bottom

22b: Holes for exhaust

23: Side panels

24: Stopper

30: Support member

31: Pivot part

31a: Shaft jack

31b: The first rotating cam part

31c: The second rotating cam

31d: Recess

32: Support part

40: Sliding member

40a: elastic member storage part

40b: jack

41: Outer cylinder

42: Guide barrel

43: Top

43a: Slider cam protrusion

43b: inclined part

43c: Flat part

50: Elastic member

60: Damper

60a: Piston rod

60b: pin

61: Compressed base member

70: Push rod

70a: Inclined cam

70b: Connection hole

80: hinge shaft

Claims (6)

A hinge device comprising: a mounting member, which is mounted on the side of the machine body, the upper part is provided with a pair of side plates, and the interior is provided with a receiving portion that opens upward; a support member, which is installed on the original press plate and is composed of a support shaft portion and a support portion, the support shaft portion is provided with a first rotating cam portion; a hinge shaft connecting the fulcrum portion of the supporting member to between a pair of side plates of the mounting member in a rotatable manner; a sliding member, which is slidably received into the receiving portion, and has a slider cam protruding portion on the top, and the slider cam protruding portion and the first rotating cam portion are in a state of constant press-fit connection; an elastic member, which is arranged between the bottom of the receiving portion and the sliding member, and makes the sliding member exert force toward the side of the first rotating cam portion; a damper disposed in the elastic member; and A push rod, one end of which is a piston rod detachably connected to the damper, and at the same time abuts against the first rotating cam portion at a predetermined closing angle when the original pressing plate performs the closing action, and is slidable is accommodated in a guiding cylindrical portion, the guiding cylindrical portion is formed in the sliding member and has an opening portion above; When the document pressing plate is closed from a predetermined opening angle, the moving distance of the sliding member after being pressed by the first rotating cam portion is longer than the moving distance of the pressing rod. The hinge device according to claim 1, wherein the length of the guide cylindrical portion is substantially equal to the length of the push rod. According to the hinge device of claim 1, when the front end of the piston rod is connected to the push rod, the front end of the piston rod is inserted into the connection hole provided on the lower end side of the push rod. The hinge device according to claim 1, wherein when the front end of the piston rod is connected to the push rod, the front end side of the piston rod and the lower end side of the push rod are connected by a pin, and the pin is connected toward the push rod. Radius through. According to the hinge device of claim 1, the first rotating cam portion and a second rotating cam portion disposed on the fulcrum portion sandwich the hinge shaft and are abutted and connected with the top of the sliding member to restrict the The maximum rotation angle of the support member. A machine includes the hinge device according to any one of Claims 1 to 5, a machine body, and a document pressing plate that opens and closes relative to the machine body.

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