Opening and closing device and electronic apparatus equipped with the same

Abstract

To hide a sliding portion to which a lubricant is applied without enlarging a device.SOLUTION: A hinge 1 in which a rotating member 20 connected to a base member 10 through a rotating shaft member 15 rotates with the rotating shaft member 15 as a fulcrum to perform opening and closing operation includes: a pressure receiving member 30 which is provided on the base member 10; and a first slide member 41, which is movable in an approaching direction and a separating direction with respect to the pressure receiving member 30, is pressed to the pressure receiving member 30 side so as to keep contact with the pressure receiving member 30, and is supported by the rotating member 20 rotatably together with the rotating member 20 while sliding with respect to the pressure receiving member 30. The first slide member 41 includes, on an end surface on a side with which the pressure receiving member 30 comes into contact, a sliding portion 411 sliding with respect to the pressure receiving member 30 during rotation of the rotating member 20, and a protrusion portion 412 protruding to the approaching direction side relative to the sliding portion 411. The protrusion portion 412 is positioned on a side opposite from the rotating shaft member 15 while having the sliding portion 411 therebetween.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an opening and closing device and an electronic device including the same. [Background technology]

[0002] Office equipment such as copying machines is generally configured such that a cover can be opened and closed relative to a main body. Patent Document 1 discloses an opening / closing device that connects a main body and a cover so that the main body and cover can be opened and closed. The opening / closing device described in Patent Document 1 opens and closes with a hinge shaft as a fulcrum, and during the closing operation, a cam slider biased by a coil spring presses a pressure-receiving member to prevent a sudden closing operation. This opening / closing device is configured such that a lubricating oil is applied to the pressure-receiving member, and a cover that covers the cam slider and the pressure-receiving member is provided to prevent manuscript paper set in the office equipment from hitting the pressure-receiving member and becoming dirty with the lubricating oil. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-043731 A Summary of the Invention [Problem to be solved by the invention]

[0004] The opening and closing device described in Patent Document 1 requires a separate component for the covering part in addition to the basic components such as the cam slider and pressure-receiving member. Furthermore, since the covering part is arranged to surround the pressure-receiving member, etc., it is necessary to secure installation space for the covering part and to consider interference with other components, etc., which may result in the device becoming larger.

[0005] Therefore, an object of the present invention is to provide an opening and closing device that can hide the sliding parts to which a lubricant is applied without increasing the size of the device, and an electronic device equipped with the same. [Means for solving the problem]

[0006] In order to achieve this object, the present invention provides an opening and closing device in which a rotating member connected to a base member via a rotating shaft member rotates about the rotating shaft member as a fulcrum to perform an opening and closing operation, a pressure-receiving member provided on the base member; a slide member that is movable in a direction approaching and moving away from the pressure-receiving member, is pressed toward the pressure-receiving member so as to be in continuous contact with the pressure-receiving member, and is supported by the rotating member so as to be rotatable together with the rotating member while sliding against the pressure-receiving member; Equipped with The slide member is a sliding portion that slides against the pressure-receiving member when the rotating member rotates, and a protruding portion that protrudes further in the approach direction than the sliding portion, on an end surface on the side in contact with the pressure-receiving member, The protruding portion is located on the opposite side of the sliding portion from the rotating shaft member. Effect of the Invention

[0007] The present invention can realize an opening and closing device capable of hiding the sliding parts to which a lubricant is applied, without increasing the size of the device. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a hinge in an open state. [Diagram 2] FIG. 2 is a perspective view of the hinge in a closed state. [Diagram 3] FIG. 3 is a cross-sectional view taken along the line III-III of FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. [Diagram 5] FIG. 5 is a perspective view of the first slide member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The opening and closing device of the present invention will be described below with reference to the drawings. In the embodiment described below, the opening and closing device of the present invention is used in an electronic device, such as a multifunction printer, whose lid can be opened and closed relative to the main body, and is described as a hinge that connects the main body and the lid. Note that the opening and closing device of the present invention can be applied to anything that can open and close two members, not just electronic devices.

[0010] Fig. 1 is a perspective view of the hinge 1 in an open state. Fig. 2 is a perspective view of the hinge 1 in a closed state. Fig. 3 is a cross-sectional view taken along the line III-III in Fig. 1. Fig. 4 is a cross-sectional view taken along the line IV-IV in Fig. 2.

[0011] In the hinge 1 of this embodiment, the rotating member 20 is provided on the base member 10 via the rotating shaft member 15, and the rotating member 20 is rotatable around the rotating shaft member 15 as a fulcrum. In this embodiment, the operation of the rotating member 20 rotating around the rotating shaft member 15 as a fulcrum is referred to as an opening / closing operation. In addition, the direction in which the end of the rotating member 20 opposite the rotation fulcrum moves away from the base member 10 in the rotation direction of the rotating member 20 is referred to as an opening direction, and the direction in which the end moves closer to the base member 10 is referred to as a closing direction. The open state in FIG. 1 refers to a state in which the rotating member 20 has rotated fully in the opening direction. In addition, the closed state in FIG. 2 refers to a state in which the rotating member 20 has rotated fully to the closed state.

[0012] When the hinge 1 is attached to a multifunction printer, the base member 10 is attached to the main body of the multifunction printer, and the rotating member 20 is attached to the document cover of the multifunction printer. This allows the document cover of the multifunction printer to rotate relative to the main body.

[0013] In this embodiment, for convenience of explanation, the base member 10 and the rotating member 20 are arranged in the vertical direction, with the base member 10 on the lower side and the rotating member 20 on the upper side. The directions perpendicular to each other and perpendicular to the vertical direction are called the front-rear direction and the left-right direction, respectively. In the open state, the rotating member 20 is in a position where its longitudinal direction is substantially aligned with the vertical direction, and when it rotates in the closing direction, it falls forward in the front-rear direction. Note that these directions do not limit the usage state of the hinge 1.

[0014] (About the configuration of hinge 1) The hinge 1 includes a base member 10, a rotating member 20, a pressure-receiving member 30, a first slide member 41, a second slide member 42, and an elastic member 50.

[0015] The base member 10 has a bottom surface portion 11 , a pair of side surfaces 12 , and a back surface portion 13 .

[0016] The bottom surface portion 11 is a rectangular metal plate extending in the front-rear direction. The back surface portion 13 is a rectangular metal plate extending in the up-down direction. The back surface portion 13 is provided at the rear end of the bottom surface portion 11, and the bottom surface portion 11 and the back surface portion 13 form a substantially L-shape when viewed from the left-right direction, as shown in Figures 3 and 4.

[0017] The pair of side portions 12 are metal plates extending in the up-down direction. The pair of side portions 12 are disposed opposite each other in the left-right direction so as to sandwich the bottom portion 11 and the back portion 13 therebetween. The pair of side portions 12 are shaped such that the rear side in the front-rear direction extends longer in the up-down direction than the front side, and a rotating member 20 is provided in the rear portion via a cylindrical rotating shaft member 15 extending in the left-right direction.

[0018] The bottom surface portion 11, the pair of side surface portions 12, and the back surface portion 13 may be separate metal plates, or may be formed by bending a single metal plate.

[0019] The rotating member 20 has a slider holding member 21 and a lift member 22. The slider holding member 21 is provided on the base member 10 via a rotating shaft member 15, so that the rotating member 20 is rotatable with respect to the base member 10. When the hinge 1 is attached to the multifunction printer, the lift member 22 of the rotating member 20 is adapted to be attached to a document cover.

[0020] The slider holding member 21 is a cylindrical member that extends in one direction and has a substantially rectangular shape when viewed from that one direction (hereinafter referred to as the longitudinal direction). One side of the slider holding member 21 is cut out along the longitudinal direction, so that a first slide member 41, a second slide member 42, and an elastic member 50, which are housed in the slider holding member 21 and will be described later, are exposed as shown in Fig. 1. The slider holding member 21 is formed by bending a single metal plate.

[0021] Although not described in detail, the lift member 22 is formed in a cylindrical rectangular shape that is long in one direction, and the slider holding member 21 is stored inside. The lift member 22 is provided on the slider holding member 21 at a position opposite the rotating shaft member 15 in the longitudinal direction of the slider holding member 21 via a cylindrical lift side rotating shaft member 23 extending along the left-right direction. The lift member 22 is also provided with a cylindrical lift side pressure receiving member 24 that extends along the left-right direction. The lift side pressure receiving member 24 is configured to be pressed by a second slide member 42 described later.

[0022] The pressure-receiving member 30 is a cylindrical member extending along the left-right direction, and is provided so as to connect a pair of side surface portions 12 of the base member 10 at a position forward of the rotating shaft member 15. The pressure-receiving member 30 comes into contact with a first slide member 41 (described below) held by the slider holding member 21, and is pressed by the first slide member 41. The shape of this pressure-receiving member 30 is not limited to a cylindrical shape, and may be any shape that can be pressed by the first slide member 41.

[0023] The first slide member 41 is held by the slider holding member 21. The first slide member 41 is movable along the longitudinal direction of the slider holding member 21 in an approaching direction toward the pressure-receiving member 30 and in a separating direction away from the pressure-receiving member 30. The first slide member 41 is pressed toward the pressure-receiving member 30 by an elastic member 50 described later so as to keep contact with the pressure-receiving member 30, and rotates together with the slider holding member 21 while sliding against the pressure-receiving member 30. The first slide member 41 is cylindrical with one end closed, and the one end is on the pressure-receiving member 30 side and is disposed so as to contact the pressure-receiving member 30. The specific configuration of the first slide member 41 will be described in detail later.

[0024] The second slide member 42, like the first slide member 41, is movable along the longitudinal direction of the slider holding member 21 and is held by the slider holding member 21 so as to rotate together with the slider holding member 21. The second slide member 42 is tubular with one end closed, and the one end is on the lift side pressure-receiving member 24 side and is disposed so as to come into contact with the lift side pressure-receiving member 24.

[0025] The elastic member 50 is disposed between the first slide member 41 and the second slide member 42 in the longitudinal direction of the slider holding member 21. The elastic member 50 is, for example, a compression coil spring, and is disposed with its axis aligned along the longitudinal direction of the slider holding member 21, and both ends are disposed inside the cylindrical first slide member 41 and the second slide member 42, respectively. That is, the first slide member 41 and the second slide member 42 also function as spring supports for the elastic member 50. The elastic member 50 presses the first slide member 41 and the second slide member 42 with its elastic force so that the first slide member 41 continues to contact the pressure receiving member 30 and the second slide member 42 continues to contact the lift side pressure receiving member 24. In the figure, one compression coil spring is shown, but the number is not particularly limited.

[0026] An oil damper 51 is disposed inside the elastic member 50 (on the axis of the compression coil spring). The oil damper 51 absorbs the impact when the first slide member 41 moves suddenly.

[0027] Next, the configuration of the first slide member 41 will be described in detail. Fig. 5 is a perspective view of the first slide member 41. The direction shown in Fig. 5 corresponds to the posture of the hinge 1 in the closed state shown in Figs. 2 and 4. The orientation of the first slide member 41 changes with the rotation of the slider holding member 21, but for convenience of explanation, the configuration of the first slide member 41 will be described below using the direction shown in Fig. 5.

[0028] The first slide member 41 is cylindrical and has one end closed. When viewed in the axial direction, the first slide member 41 may be circular or rectangular. As shown in FIG. 4, the first slide member 41 is held by the slider holding member 21 with the closed end facing the pressure-receiving member 30. The first slide member 41 has a sliding portion 411 and a protruding portion 412 at the closed end.

[0029] The sliding part 411 has a sliding surface 411A that slides against the pressure-receiving member 30 when the pressure-receiving member 30 comes into contact with the sliding part 411 and the slider holding member 21 rotates. The sliding surface 411A is inclined in the up-down direction so as to move rearward from the bottom to the top. Hereinafter, the lower part of the sliding surface 411A may be referred to as the lower part, and the upper part as the higher part. A lubricant is applied to the contact part between the pressure-receiving member 30 and the sliding part 411. A groove 411B for storing the lubricant is provided on the sliding surface 411A of the sliding part 411.

[0030] The protruding portion 412 is located below the sliding portion 411 in the up-down direction and protrudes rearward from the sliding portion 411. In the arrangement direction in which the sliding portion 411 and the protruding portion 412 are arranged (the up-down direction in the figure), it is preferable that the length L2 of the protruding portion 412 is 1 / 3 or more of the length L1 of the first slide member 41. It is also preferable that the length of the protruding portion 412 in the left-right direction is approximately the same as the length of the sliding portion 411 in the left-right direction. Note that in FIG. 5, the protruding portion 412 has a shape having a flat surface along the up-down direction and the left-right direction, but the shape of the protruding portion 412 is not particularly limited, and for example, the flat surface may be an arched shape.

[0031] In a state in which the first slide member 41 thus configured is held by the slider holding member 21, as shown in FIG. 3 and FIG. 4, the protruding portion 412 is located on the opposite side of the rotating shaft member 15 with the sliding portion 411 interposed therebetween. The protruding portion 412 also protrudes toward the pressure-receiving member 30 in the approaching direction side beyond the sliding portion 411. Therefore, even when the hinge 1 is in the open state, the contact portion between the pressure-receiving member 30 and the sliding portion 411 is not exposed forward by the protruding portion 412. More specifically, when the hinge 1 is applied to a multifunction printer, a sheet of paper to be set in the multifunction printer is located between the base member 10 and the slider holding member 21 in the open state. Even if the sheet of paper slides toward the hinge 1 when set, the protruding portion 412 prevents the sheet of paper from reaching the contact portion between the pressure-receiving member 30 and the sliding portion 411. As a result, it is possible to prevent the sheet of paper from being soiled by the lubricant.

[0032] Furthermore, by providing the protruding portion 412, the thickness (length in the front-rear direction in FIG. 5) of the first slide member 41 increases, and the strength of the first slide member 41 can be improved.

[0033] (About the operation of hinge 1) The operation of the hinge 1 configured as above will now be described.

[0034] When the hinge 1 is in the open state shown in FIG. 1 and FIG. 3, the pressure receiving member 30 contacts the lower part of the sliding surface 411A of the first slide member 41. When the hinge 1 in the open state transitions to the closed state, the slider holding member 21 rotates about the rotating shaft member 15 as a fulcrum while the sliding surface 411A of the first slide member 41 slides against the pressure receiving member 30. At this time, the contact portion of the first slide member 41 with the pressure receiving member 30 moves from the lower part to the higher part of the sliding surface 411A. As a result, the first slide member 41 gradually moves in a direction away from the pressure receiving member 30. The elastic member 50, which is a compression coil spring, is compressed by the first slide member 41 because the movement of the second slide member 42 side is restricted by the lift side pressure receiving member 24. The first slide member 41 presses the pressure receiving member 30 by the elastic force of the elastic member 50. In other words, when the rotating member 20 rotates in the closing direction, the pressing force from the first sliding member 41 to the pressure-receiving member 30 gradually increases.

[0035] When the hinge 1 is in the closed state shown in FIG. 2 and FIG. 4, the pressure-receiving member 30 comes into contact with the high portion of the sliding surface 411A of the first slide member 41. When the hinge 1 in the closed state transitions to the open state, the slider holding member 21 rotates about the rotating shaft member 15 as a fulcrum while the sliding surface 411A of the first slide member 41 slides against the pressure-receiving member 30. At this time, the contact portion of the first slide member 41 with the pressure-receiving member 30 moves from the high portion to the low portion of the sliding surface 411A. As a result, the first slide member 41 gradually moves in a direction approaching the pressure-receiving member 30, and the elastic force of the elastic member 50 becomes smaller. In other words, when the rotating member 20 rotates in the opening direction, the pressing force from the first slide member 41 to the pressure-receiving member 30 gradually becomes smaller.

[0036] As described above, when the hinge 1 is close to the closed state, the pressing force from the first slide member 41 to the pressure-receiving member 30 is large. When the hinge 1 is applied to a multifunction printer, the document cover of the multifunction printer is attached to the rotating member 20. Therefore, when the hinge 1 is close to the closed state, the force acting in the closing direction on the rotating member 20 is large due to the weight of the rotating member 20 and the weight of the document cover of the multifunction printer. Therefore, by increasing the pressing force from the first slide member 41 to the pressure-receiving member 30, the sudden rotation of the rotating member 20 in the closing direction can be suppressed by the braking action. In addition, by adjusting the pressing force from the first slide member 41 to the pressure-receiving member 30, the rotating member 20 can be stopped midway through rotation.

[0037] The rotary member 20 is prevented from being suddenly closed by an oil damper 51.

[0038] In addition, it is preferable that the pressure-receiving member 30 is located closer to the rotating shaft member 15. This allows the first slide member 41, which is in contact with the pressure-receiving member 30, to be located closer to the pressure-receiving member 30, and the distance between the first slide member 41 and the second slide member 42 becomes wider. As a result, it becomes possible to place an oil damper 51 between the first slide member 41 and the second slide member 42 even if it is large, and even if such an oil damper 51 is placed, the hinge 1 itself does not become large. [Explanation of symbols]

[0039] 1: Hinge 10: Base material 11: Bottom part 12: Side part 13: Back part 15: Rotating shaft member 20: Rotating member 21: Slider holding member 22: Lifting parts 23: Lift side rotating shaft member 24: Lift side pressure-receiving member 30: Pressure-receiving member 41: First slide member 42: Second slide member 50: Elastic material 51: Oil damper 411: Sliding part 411A:Sliding surface 411B: Grease groove 412:Protrusion

Claims

1. An opening and closing device in which a rotating member connected to a base member via a rotating shaft member rotates about the rotating shaft member as a fulcrum to perform an opening and closing operation, a pressure-receiving member provided on the base member; a slide member that is movable in a direction approaching and moving away from the pressure-receiving member, is pressed toward the pressure-receiving member so as to be in continuous contact with the pressure-receiving member, and is supported by the rotating member so as to be rotatable together with the rotating member while sliding against the pressure-receiving member; Equipped with The slide member is a sliding portion that slides against the pressure-receiving member when the rotating member rotates, and a protruding portion that protrudes in the approach direction beyond the sliding portion, on an end surface on the side in contact with the pressure-receiving member, The protruding portion is located on the opposite side of the sliding portion from the rotating shaft member. Switchgear.

2. A length of the protruding portion in an arrangement direction in which the sliding portion and the protruding portion are aligned is ⅓ or more of a length of the end surface in the arrangement direction. The opening and closing device according to claim 1 .

3. The slide member is a cylindrical member having one end closed, the one end being disposed on the pressure-receiving member side; an elastic member disposed inside the slide member and pressing the slide member toward the pressure-receiving member; The opening and closing device according to claim 1 or 2, further comprising:

4. An electronic device comprising the opening and closing device according to claim 1, wherein a main body and a lid are opened and closed, The main body and the lid are connected by the opening and closing device. electronic equipment.

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