JP6913933B2 - Hinge - Google Patents

Description

The present invention relates to a hinge that rotatably connects a lid to a main body of, for example, office equipment.

Conventionally, many office equipment used in offices such as copiers, facsimiles, and scanners are provided with a document reading unit (contact glass) on the upper surface of the main body, and a document crimping plate covering the document reading unit is covered. Provide as a part. The document crimping plate is for bringing the document placed on the document reading section into close contact with the document reading section and holding the position of the document with respect to the document reading section. A hinge is used as an instrument for connecting the main body of such office equipment and the document crimping plate.

The hinge pivotally supports the rotating member on the case member via the rotating shaft, and houses the spring member and the slide member inside the case member. Further, the slide member is urged by the spring member to press the cam portion formed on the rotating member. Then, by fixing the case member to the main body of the office equipment and fixing the rotating member to the document crimping plate, a force is applied when the user lifts the document crimping plate (for example, Patent Document 1). reference).

Japanese Unexamined Patent Publication No. 2011-28078

According to the hinge according to the prior art, as shown in P0 in FIG. 10, the rotational torque applied in the rotational direction in which the rotating member is separated from the case member by the urging force of the spring member, and the rotating member is the original document. In some cases, the weight torque applied in the rotation direction close to the case member due to the weight of the crimping plate is balanced at a stage where the angle of the rotating member with respect to the case member is relatively small (an angle close to the closed state). In this case, since the document crimping plate is stationary at that angle, a state in which a large torque is applied to the rotating member is maintained. When a large torque is applied to the rotating member, the stress generated in the cam portion and the sliding member of the rotating member increases. Therefore, the continuation of such a state for a long time causes the change with time of each member. rice field.

The present invention has been made in view of the above circumstances, and the problem to be solved by the present invention is to set the rotational torque and the weight torque at a stage where the angle of the rotating member with respect to the case member is relatively large (open). By balancing at an angle close to the state), it is possible to prevent the stress generated in the cam portion and the slide member of the rotating member from increasing even when the original crimping plate is stationary for a long time, and to suppress the change with time of each member. To provide a hinge.

Hereinafter, means for solving the above problems will be described.

That is, in claim 1, the lid portion, the tubular case member having the bottom portion on one end side and the opening on the other end side and fixed to the main body portion, and the case member slidable inside the case member. a slide member which is accommodated, a rotating member fixed to the lid portion is rotatably supported by the rotation shaft at the opening of the case member, and said slide member and said bottom of said case member A hinge that includes a spring member inserted between them and rotatably connects the main body and the lid, and the rotating member rotates relative to the case member. As a result, the angle with respect to the case member becomes the first predetermined angle between the closed state closest to the case member, the open state closest to the case member, and the closed state and the open state. A first state and a second state in which the angle with respect to the case member is a second predetermined angle larger than the first predetermined angle can be transitioned, and the first predetermined angle is the open state. The second predetermined angle is set to an angle closer to the open state than to the closed state, and the slide is placed on the side of the slide member in the rotating member. A cam portion is formed that comes into contact with the member and is separated from the slide member by the rotation of the rotating member, and the rotating member is separated from the case member by the urging force of the spring member. A rotation torque is applied, and a weight torque is applied in the rotation direction close to the case member by the weight of the lid portion , and the weight torque is applied as the angle of the rotation member with respect to the case member decreases. The rotation torque when the rotating member is located in the open state is larger than the weight torque, and the rotation when the rotating member is displaced from the open state to the second state. The kinetic torque decreases as the angle of the rotating member with respect to the case member decreases, and the rotating torque when the rotating member is in the second state is smaller than the weight torque. The rotational torque when the rotating member is displaced from the second state to the first state increases to the same extent as the increase in the weight torque, and when the rotating member is positioned in the first state. The rotation torque is smaller than the weight torque, and the rotation torque when the rotation member is in the closed state is the rotation torque when the rotation member is in the first state. Smaller than, the rotation when the rotating member is in the closed state The torque is smaller than the weight torque.

In claim 2, the cam portion of the rotating member is formed with a high friction portion having a higher frictional force with the slide member than other portions, and the rotating member is said to be in the first state. The high friction portion comes into contact with the slide member while being displaced to the closed state, thereby alleviating the impact of the rotating member coming into contact with the upper surface of the main body.

In claim 3, the high friction portion of the rotating member incorporates a high friction member having a higher frictional force with the slide member than other portions.

In claim 4, unevenness is formed on the high friction portion of the rotating member by embossing.

In the hinge according to the present invention, when the lid member is stationary for a long time by balancing the dynamic torque and the weight torque at a stage where the angle of the rotating member with respect to the case member is relatively large (an angle close to the open state). However, it is possible to prevent the stress generated in the cam portion and the slide member of the rotating member from becoming large, and to suppress the change with time of each member.

The left side view which shows the multifunction device provided with the hinge which concerns on one Embodiment of this invention. Left side view showing a hinge in a closed state. Front view showing a hinge in a closed state. A cross-sectional view showing a hinge in a closed state (cross-sectional view taken along the line AA in FIG. 3). Sectional drawing which shows the hinge in an open state. Sectional drawing showing the hinge of the second state. Sectional drawing showing the hinge of the first state. Sectional drawing showing a hinge between a closed state and a first state. The figure which showed the torque applied to a rotating member. The figure which showed the torque applied to the rotating member in the hinge which concerns on the prior art.

Hereinafter, the multifunction device 1 which is an office equipment provided with the hinge 100 according to the embodiment of the present invention will be described with reference to FIG.
The multifunction device 1 includes a main body 2 and a document crimping plate 3. In the present embodiment, the multifunction device 1 is configured to include the hinge 100, but other office equipment different from the multifunction device 1 may be configured to include the hinge 100.

The main body 2 is an embodiment of the main body according to the present invention.
The main body 2 includes a document reading device, a control device, a printing device, a display device, and an input device.
The document reading device is arranged on the upper surface of the main body 2. The document reading device reads a document placed on the upper surface (document reading unit) of the main body 2 (generates image information of the document).
The control device controls the operation of each part of the multifunction device 1, more specifically, the operation of the document reading device, the printing device described later, and the ADF described later. Further, the control device can store the image information generated by the document reading device and the image information acquired through a line (Internet line or the like) connected to the main body 2.
The printing device is located below the document reading device. The printing device prints an image on a predetermined sheet of paper based on the image information stored in the control device.
The display device is composed of, for example, a liquid crystal panel, and displays information related to the operating status of the multifunction device 1.
The input device includes, for example, a button, a switch, and the like, and is operated when an operator inputs an instruction or the like to the multifunction device 1. The display device and the input device are arranged on the front surface of the upper surface of the main body 2.

The original crimping plate 3 is an embodiment of the lid member according to the present invention.
The document crimping plate 3 presses (crimps) the document placed on the document reading device toward the document reading device, so that the document moves when the document reading device reads the document (relative to the document reading device). The target position changes).
The document crimping plate 3 includes a pre-reading document accommodating tray, an ADF (Auto Document Feeder), and a post-scanning document accommodating tray.
The ADF takes out a plurality of originals stored in a stacked state in the pre-reading original storage tray one by one and places them in a predetermined reading position on the original reading device. After the reading of the original by the original reading device is completed, the ADF reads the original placed in the scanning position and then conveys the original to the original storage tray.

“Office equipment” refers to a device having at least a function of reading a document (acquiring image information of the document).
Specific examples of office equipment include (a) a scanner having a function of reading a document and a function of transmitting image information related to the scanned document to another device (for example, a personal computer), and (b) a function of reading a document. A fax machine having a function of transmitting image information related to a scanned document to another device via a communication line and a function of printing out image information acquired from the other device, (c) a function of scanning the document and scanning. Examples thereof include a copier having a function of printing out image information related to a manuscript, (d) the scanner, the fax, and a multifunction device having a function as a copier.

In the following description, the rotation angle θ (more strictly, the main body) of the original crimping plate 3 when the original crimping plate 3 is closed (when the lower surface of the original crimping plate 3 is in contact with the upper surface of the main body 2). The rotation angle θ) of the document crimping plate 3 with respect to 2 is set to “0 degree” so that the rotation angle θ increases (the rotation angle θ becomes positive) when the document crimping plate 3 rotates in the opening direction. The rotation angle θ of the document crimping plate 3 is defined in (see FIG. 1). Further, the rotation angle θ formed by the fixing plate 30 of the hinge 100 and the hinge case 10 is also described corresponding to the above posture. That is, the rotation angle θ of the fixing plate 30 with respect to the hinge case 10 when the document crimping plate 3 is closed is described as “0 degree”.

Hereinafter, the hinge 100 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 9.
As shown in FIG. 1, the hinge 100 rotatably connects the document crimping plate 3 to the main body 2 of the multifunction device 1. Specifically, the tubular hinge case 10 which is a case member according to the present invention is fixed to the main body 2 of the multifunction device 1, and the fixing plate 30 which is a rotating member according to the present invention is a document crimping plate of the multifunction device 1. By being fixed to 3, the document crimping plate 3 is rotatably connected to the main body 2. In the present embodiment, each member of the hinge 100 is injection-molded with a resin.

As shown in FIGS. 2 to 8, the hinge 100 rotates at the opening of the hinge case 10 and the hinge case 10 having a bottom portion 10a on one end side (lower side in the present embodiment) and an opening on the other end side. A fixed plate 30 pivotally supported by a shaft 25, a slide member 40 slidably housed inside the hinge case 10, a spring member 50 inserted between the bottom 10a of the hinge case 10 and the slide member 40, and the like. Equipped.

In the following, for convenience, the vertical direction, the front-back direction, and the left-right direction of the compound machine 1 when the document crimping plate 3 is closed with respect to the main body 2 (when the rotation angle θ0 = 0 degrees, see FIG. 8) are used as references. The hinge 100 is configured (corresponding the vertical direction, the front-rear direction, and the left-right direction of the compound machine 1 when the document crimping plate 3 is closed with respect to the main body 2 to the vertical direction, the front-back direction, and the left-right direction of the hinge 100, respectively). The shape of each member to be used will be described.

The hinge case 10 is a tubular member having an opening formed on the upper side, and is fixed to the main body 2 of the multifunction device 1. A bottom portion 10a is formed on the lower side of the hinge case 10. Support plates 11 and 11 for supporting the rotating shaft 25 are erected upward on both the left and right sides of the upper portion of the hinge case 10.

The fixing plate 30 is a block-shaped member that is rotatably supported by the support plates 11 and 11 of the hinge case 10 by the rotation shaft 25. A fixing hole 30a that penetrates the fixing plate 30 in the left-right direction is formed at the rear portion of the fixing plate 30, and a cam portion 31 that bulges downward is formed at the lower end portion. The cam portion 31 comes into contact with the cam contact projection 41 of the slide member 40, and is brought close to and separated from the slide member 40 by the rotation of the fixing plate 30. The cam portion 31 is formed with a high friction portion having a higher frictional force with the slide member 40 than other portions. Specifically, as shown in FIGS. 4 to 8, a high friction member 33 having a higher frictional force with the slide member 40 than other parts of the cam portion 31 is incorporated in the fixed plate 30. The fixing plate 30 is formed with a fixing portion 32 extending in the left-right direction, and the fixing portion 32 is fixed to the document crimping plate 3 of the multifunction device 1.

As shown in FIG. 2, the fixing plate 30 is pivotally supported by the rotation shaft 25 on the support plates 11 and 11 of the hinge case 10. Specifically, as shown in FIGS. 4 to 8, the fixing plate 30 is pivotally supported by the hinge case 10 by inserting the rotating shaft 25 into the fixing holes 30a of the support plates 11 and 11 and the fixing plate 30, respectively. ..

As shown in FIGS. 2 to 8, the slide member 40 is a resin member slidably housed inside the hinge case 10. The slide member 40 is a bottomed tubular member having an opening at the bottom, and a cam contact protrusion 41 protruding upward on the side of the fixing plate 30 is formed on the upper surface thereof, and a housing hole 40a is formed on the lower surface thereof. It is formed.

A spring member 50 is inserted between the bottom portion 10a of the hinge case 10 and the slide member 40. Specifically, as shown in FIGS. 2 to 5, the lower end portion of the spring member 50 is in contact with the upper surface of the bottom portion 10a, and the upper end portion is accommodated in the accommodating hole portion 40a of the slide member 40 and the bottom surface of the accommodating hole portion 40a. Is in contact with.

As described above, by inserting the spring member 50 between the hinge case 10 and the slide member 40, the urging force of the spring member 50 causes the fixing plate 30 to rotate in the rotational direction away from the hinge case 10. Is given. Specifically, the force from the spring member 50 is transmitted upward (counterclockwise direction in FIG. 4) to the cam portion 31 of the fixing plate 30 via the cam contact projection 41 of the slide member 40. As a result, the front portion of the fixing plate 30 (the portion where the fixing portion 32 is formed) rotates in the upward lifting direction. As shown in FIG. 5, the rotation of the rotated fixing plate 30 is restricted by the rear side contacting the regulating portion 10c of the hinge case 10. The hinge 100 according to the present embodiment is configured so that the rotation of the fixing plate 30 is restricted when the rotation angle θ becomes θ3 = about 50 degrees (see FIG. 8). Further, the fixing plate 30 is given a weight torque in the rotation direction in which the fixing plate 30 is close to the hinge case 10 due to the weight of the document crimping plate 3. Specifically, the force from the document crimping plate 3 is transmitted downward (clockwise in FIG. 5) to the fixing plate 30. The fixing plate 30 and the document crimping plate 3 stand still when the rotational torque applied to the fixing plate 30 and the weight torque are in equilibrium, and the angle of the fixing plate 30 with respect to the hinge case 10 at this time is maintained.

In this way, the fixed plate 30 rotates relative to the hinge case 10 so that the fixed plate 30 is in a closed state closest to the hinge case 10 (as shown in FIGS. 2, 4 and 9), the rotation angle θ0. (= 0 degree state) and an open state (as shown in FIGS. 5 and 9) that is farthest from the hinge case 10 (a state in which the rotation angle θ3 = about 50 degrees) can be transitioned. Further, the fixed plate 30 has a first state in which the rotation angle θ is the first predetermined angle θ1 = about 10 degrees as shown in FIG. 7, and the rotation angle θ is the second predetermined angle θ2 as shown in FIG. = The second state, which is about 40 degrees, can be transitioned. The rotation angles θ (θ1 to θ3) in the first state, the second state, and the open state can be appropriately changed by changing the shape of the cam portion 31 or the like.

Further, in the hinge 100, the ribs 43 and 43 which are in sliding contact with the front inner peripheral surface 10b of the hinge case 10 facing the front side surface 40b on the front side surface 40b which is the side surface of the slide member 40 on the side far from the rotation shaft 25. ... Is formed in a portion (see FIG. 5) located inside the hinge case 10 when the fixing plate 30 is located in the open state.

In the hinge 100 according to the present embodiment, as shown in FIG. 9, the rotation torque when the fixed plate 30 is located in the open state (rotation angle θ = θ3) is configured to be larger than the weight torque. .. Therefore, torque is applied to the fixed plate 30 in the open state in the counterclockwise direction in FIG. 5, but rotation is restricted by the regulating portion 10c.

Further, as shown in FIG. 9, the rotation torque when the fixed plate 30 is displaced from the open state to the second state (rotation angle θ = θ2) increases as the angle of the fixed plate 30 with respect to the hinge case 10 decreases. Decrease.

Further, as shown in FIG. 9, the rotation torque when the fixed plate 30 is in the second state is configured to be smaller than the weight torque. Therefore, as shown in P1 in FIG. 9, when the fixed plate 30 is displaced from the open state to the second state, a state in which the rotational torque and the weight torque are in equilibrium occurs.

Further, as shown in FIG. 9, the rotation torque when the fixed plate 30 is displaced from the second state to the first state (rotation angle θ = θ1) increases to the same extent as the increase in the weight torque. That is, the rotation torque when the fixed plate 30 is in the first state is smaller than the weight torque. Therefore, when the rotation angle θ is equal to or less than the rotation angle θ2 in the second state (strictly speaking, when the rotation angle θ is smaller than P1 in FIG. 9), the fixed plate 30 is shown in FIGS. Torque is applied in the clockwise direction in No. 7 to rotate clockwise.

Further, as shown in FIG. 9, the rotation torque when the fixed plate 30 is displaced from the first state to the closed state (θ = θ0) is reduced, and the rotation torque when the fixed plate 30 is located in the closed state is , Less than the weight torque. Therefore, torque is applied to the fixing plate 30 in the clockwise direction in FIG. 4, and the document crimping plate 3 is supported in a state of being in contact with the upper surface of the main body 2.

According to the hinge 100 according to the present embodiment, as described above, when the fixed plate 30 is displaced from the open state to the second state, a state in which the rotational torque and the weight torque are in equilibrium occurs (P1 in FIG. 9). See). As described above, in the present embodiment, the rotation torque and the weight torque are balanced at a stage where the rotation angle θ is relatively large (an angle close to the open state). As a result, the document crimping plate 3 can be stopped in a state where the rotation angle θ is large, so that it is possible to prevent the fixing plate 30 from being maintained in a state in which a large torque is applied. That is, it is possible to prevent the stress generated in the cam portion 31 and the slide member 40 of the fixed plate 30 from increasing, and to suppress the change with time of each member.

Further, according to the hinge 100 according to the present embodiment, the high friction member 33 comes into contact with the cam contact projection 41 of the slide member 40 while the fixing plate 30 is displaced from the first state to the closed state. As a result, as shown by the broken line arrow F in FIG. 8, an upward frictional force acts on the fixed plate 30 from the cam contact projection 41, so that between the first state and the closed state as shown in P2 in FIG. The rotation torque can be partially increased with. That is, when the fixing plate 30 is displaced from the first state to the closed state, the impact of the document crimping plate 3 coming into contact with the upper surface of the main body 2 can be alleviated (a damper effect can be obtained). The arithmetic mean roughness of the high friction member 33 is preferably Ra = 25 to 35. Further, in the present embodiment, the high friction member 33 is arranged in the portion of the cam portion 31 where the rotation angle θ of the fixed plate 30 is between about 3 degrees and about 8 degrees and comes into contact with the cam contact projection 41. ing. In other words, the rotation angle θ is between about 3 degrees and about 8 degrees, and a large frictional force acts on the fixed plate 30.

In the present embodiment, when the fixed plate 30 is injection-molded, the high-friction portion 33 is formed in the cam portion 31 by incorporating the high-friction member 33 having irregularities formed by the embossing into the mold in advance. The texture processing of the high friction member 33 in the present embodiment is subjected to unevenness by a chemical treatment by etching or a physical treatment such as sandblasting or polishing. The high friction member 33 is not limited to a member having irregularities formed by grain processing, and another material having a high frictional force can be used. Further, by applying the embossing process to the cam portion 31 of the fixed plate 30, it is also possible to directly process the uneven shape on the cam portion 31.

2 Main body (main body)
3 Original crimping plate (cover)
10 Hinge case (case member)
30 Fixed plate (rotating member)
31 Cam part 40 Slide member 50 Spring member 100 Hinge

Claims (4)

A lid portion, a tubular case member having an opening formed on one end side and an opening on the other end side and fixed to the main body portion, a slide member slidably housed inside the case member, and the like. a rotating member fixed to the lid portion is rotatably supported by the opening of the case member by rotation axis, and the bottom portion of the case member and a spring member interposed between said slide member A hinge that rotatably connects the main body and the lid.
By rotating relative to the case member, the rotating member is in a closed state closest to the case member, an open state closest to the case member, and a closed state and the open state. A first state in which the angle with respect to the case member is the first predetermined angle, and a second state in which the angle with respect to the case member is a second predetermined angle larger than the first predetermined angle. Is configured to be transitionable,
The first predetermined angle is set to an angle closer to the closed state than the open state.
The second predetermined angle is set to an angle closer to the open state than the closed state.
On the side of the slide member of the rotating member, a cam portion is formed that comes into contact with the slide member and is brought close to and separated from the slide member by the rotation of the rotating member.
The rotating member is given a rotational torque in the rotational direction away from the case member by the urging force of the spring member, and the weight torque in the rotational direction close to the case member due to the weight of the lid portion. Is given,
The weight torque increases as the angle of the rotating member with respect to the case member decreases.
The rotation torque when the rotating member is located in the open state is larger than the weight torque.
The rotational torque when the rotating member is displaced from the open state to the second state decreases as the angle of the rotating member with respect to the case member decreases.
The rotation torque when the rotating member is located in the second state is smaller than the weight torque.
The rotational torque when the rotating member is displaced from the second state to the first state increases to the same extent as the increase in the weight torque.
The rotation torque when the rotating member is located in the first state is smaller than the weight torque.
The rotation torque when the rotating member is located in the closed state is smaller than the rotating torque when the rotating member is located in the first state.
A hinge in which the rotational torque when the rotating member is located in the closed state is smaller than the weight torque. The cam portion of the rotating member is formed with a high friction portion having a higher frictional force with the slide member than other portions.
Claim that the high friction portion abuts on the slide member while the rotating member is displaced from the first state to the closed state to alleviate the impact of the rotating member abutting on the upper surface of the main body. Item 1. The hinge according to item 1. The hinge according to claim 2, wherein a high friction member having a higher frictional force with the slide member than other parts is incorporated in the high friction portion of the rotating member. The hinge according to claim 2 or 3, wherein irregularities are formed on the high friction portion of the rotating member by embossing.

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