Opening / closing device and electronic apparatus with opening / closing device

Abstract

To provide an opening / closing device capable of stabilizing movement of a damper.SOLUTION: An opening / closing device for performing opening / closing operation by making rotation member 20 rotate with respect to a base member 10 includes pressure receiving members 30 provided in the rotation member to rotate with the rotation member, a damper member provided in the base member to have a body part 61 and a rod 62 projecting from the body part toward the pressure receiving members to advance / retreat with respect to the body part, and a slide member having a through hole 43 into which the rod is inserted. When the slide member is moved to the body part side, a tip of the rod is projected from the through hole 43 toward the pressure receiving members 30, a buffer effect is generated when the tip of the rod is pressed by the pressure receiving members to move the rod toward the body part, and the slide member has an inclination prevention part 44 for preventing the rod from being inclined to the body part.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a technology of an opening / closing device that performs an opening / closing operation by rotating a rotating member with respect to a base member, and an electronic device including the opening / closing device.

Background Art

[0002] Conventionally, in a hinge that rotatably connects a second connection object to a first connection object, a hinge including a case, a cam block, a slider, a biasing member, a damper, and an arm is known (see Patent Document 1). The case of the hinge is fixed to either the first connection object or the second connection object. The cam block is rotatably supported by the case and fixed to the other of the first connection object or the second connection object. The slider is housed in a housing chamber of the case so as to be movable in a direction approaching and separating from the cam block, and is configured to be able to contact a cam surface of the cam block. The biasing member biases the slider in a direction approaching the cam block. The arm is rotatably supported by the case and is configured to be able to contact the cam surface of the cam block and also to be able to contact a rod portion of the damper. The damper is a fluid damper device and is configured to generate a buffering effect when the rod portion is pushed in by the arm.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the hinge, when the rod portion of the damper is pushed in, the rod portion may tilt with respect to the moving direction of the rod portion. When the rod portion of the damper tilts in this way, the contact portion between the rod portion and the arm and the contact angle between the rod portion and the arm, etc. become different from those set in advance, and the movement of the rod portion may become unstable.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide an opening / closing device capable of stabilizing the movement of the rod of a damper.

Means for Solving the Problems

[0006] In the opening / closing device disclosed in the present application, a rotating member is rotatably provided on a base member, and the opening / closing device that performs an opening / closing operation by rotating the rotating member with respect to the base member, provided on the rotating member, a pressure receiving member that rotates together with the rotating member, provided on the base member, a main body portion, and a rod that protrudes from the main body portion toward the pressure receiving member side and advances and retreats with respect to the main body portion, a damper member having, a through hole into which the rod is inserted, provided on the base member so as to be movable between the pressure receiving member and the main body portion, pressed toward the pressure receiving member side, and when the rotating member rotates in the closing direction, a slide member that is pressed by the pressure receiving member and moves toward the main body portion side, provided, the damper member, when the slide member moves toward the main body portion side, the tip of the rod protrudes from the through hole toward the pressure receiving member side, and the tip is pressed by the pressure receiving member to move the rod toward the main body portion side to generate a buffering effect, the slide member, when the rod moves, has an inclination preventing portion that prevents the rod from inclining with respect to the main body portion.

Effects of the Invention

[0007] According to the present invention, the movement of the rod of the damper can be stabilized.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0009] The opening / closing device 100 described in FIGS. 1 to 9 will be described. The opening / closing device 100 is a hinge that connects one of two members to the other member in an openable / closable manner. The opening / closing device 100 includes a base member 10 and a rotating member 20. The rotating member 20 is rotatably provided on the base member 10 via a rotation shaft 15, and the opening / closing operation is performed by the rotation of the rotating member 20 with respect to the base member 10. The opening / closing device 100 is used, for example, in OA devices such as scanners, fax machines, copiers, or multifunction devices, automobiles, toilet seats, or various electronic devices such as rice cookers. And the opening / closing device 100 is used, for example, to rotatably connect a cover to the main body of a printer, to rotatably connect a document pressing device to the main body of a multifunction device, to rotatably connect a display to a stand, to rotatably connect a toilet seat to a toilet bowl, or to rotatably connect a bonnet to the vehicle body of an automobile.

[0010] Hereinafter, it is assumed that 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. Also, the directions orthogonal to each other and orthogonal to the vertical direction are referred to as the front-rear direction and the left-right direction, respectively. The rotation axis 15 extends along the left-right direction, and the rotating member 20 rotates about the rotation axis 15. When the opening / closing device 100 is attached to the multifunction machine, the base member 10 is attached to the main body of the multifunction machine, and the rotating member 20 is attached to the document pressing device of the multifunction machine. Note that these directions do not limit the usage state of the opening / closing device 100.

[0011] Also, hereinafter, in the rotation direction of the rotating member 20, the state where the end of the rotating member 20 on the side opposite to the rotation fulcrum (rotation axis 15) has rotated forward completely is referred to as the closed state (see, for example, FIGS. 5 and 6). From this closed state, the state where the end of the rotating member 20 on the side opposite to the rotation fulcrum (rotation axis 15) has rotated backward is referred to as the open state (see, for example, FIGS. 1 to 4). In this open state, the state where the end of the rotating member 20 on the side opposite to the rotation fulcrum (rotation axis 15) has rotated backward completely is referred to as the fully open state (see FIGS. 1 and 2).

[0012] The base member 10 is a substantially rectangular cylindrical member having the vertical direction as the longitudinal direction, an opening 11 at the upper part, and a bottom at the lower part. A slider 40, a spring member 50, and a damper member 60 are accommodated in the space inside the base member 10. The base member 10 is provided with a damper fixing portion 13 for fixing the main body portion 61 of the damper member 60 on the inside thereof. The damper fixing portion 13 is provided at the bottom of the base member 10, is substantially cylindrical and extends in the vertical direction, and has an opening at the upper side. The damper member 60 accommodated in the base member 10 is disposed inside the damper fixing portion 13 in the radial direction, and the spring member 50 is disposed outside the damper fixing portion 13 in the radial direction.

[0013] The base member 10 includes left and right support portions 12. The support portions 12 project upward from the left and right portions, respectively, at the upper rear portion of the base member 10. The support portions 12 rotatably support the rotating member 20 via the rotation axis 15. A through hole for inserting the rotation axis 15 is opened in the support portions 12.

[0014] The rotating member 20 is rotatably connected to the support portion 12 of the base member 10 via a rotating shaft 15. A through hole for inserting the rotating shaft 15 is opened at the rear portion of the rotating member 20.

[0015] The rotating shaft 15 is inserted into the through hole of the support portion 12 of the base member 10 and the through hole of the rotating member 20. The rotating shaft 15 is a member that rotatably connects the rotating member 20 to the base member 10. The rotating shaft 15 is generally a cylindrical member. The rotating member 20 is rotatably connected to the base member 10 via the rotating shaft 15.

[0016] In addition to the base member 10, the rotating shaft 15, and the rotating member 20, the opening and closing device 100 includes a pressure receiving member 30, a slider 40, a spring member 50, and a damper member 60.

[0017] The pressure receiving member 30 is provided on the rotating member 20 and rotates together with the rotating member 20. As shown in FIG. 6, the pressure receiving member 30 protrudes downward from the rotating member 20 in the closed state, and the lower end portion is configured in a curved surface shape. The pressure receiving member 30 includes a pair of first pressure receiving portions 31 provided along the left - right direction and a second pressure receiving portion 32 as shown in FIG. 1. The first pressure receiving portion 31 presses the cam portion 41 of the slider 40 described later. The second pressure receiving portion 32 presses the tip portion (the cap 63 in this embodiment) of the rod 62 of the damper member 60 described later. The second pressure receiving portion 32 is disposed between the pair of first pressure receiving portions 31 and is formed at the left - right center portion of the lower part of the rotating member 20. The first pressure receiving portion 31 protrudes toward the slider 40 side more than the second pressure receiving portion 32 in the closed state.

[0018] The slider 40 is an embodiment of the slide member according to the present invention. The slider 40 is made of a resin material. The slider 40 is configured in a cylindrical shape having an opening at the lower part and a top at the upper part. The slider 40 is housed inside the base member 10 and is configured to be movable in the vertical direction.

[0019] The slider 40 includes a pair of left and right cam portions 41, a cylindrical portion 42, and a through hole 43. The cam portions 41 are respectively provided on the left and right of the top upper surface of the slider 40 and are formed of curved surfaces. The cylindrical portion 42 is formed at the left and right central portions of the top upper surface of the slider 40. The cylindrical portion 42 is disposed between the pair of left and right cam portions 41. The cylindrical portion 42 protrudes toward the rotating member 20 side more than the cam portions 41. A through hole is formed at the top of the slider 40, and the through hole is configured to communicate with the inside of the cylindrical portion 42. The through hole at the top of the slider 40 and the inside of the cylindrical portion 42 are configured as the through hole 43. In the present embodiment, the penetrating direction of the through hole 43 is the vertical direction. The through hole 43 is configured such that the cap 63 of the damper member 60 described later can move in the vertical direction. The slider 40 is pressed upward by the elastic force of the spring member 50 described later, and the cam portion 41 is configured to contact the first pressure receiving portion 31. A lubricant is applied to the contact portion between the cam portion 41 of the slider 40 and the first pressure receiving portion 31 to suppress wear.

[0020] The spring member 50 is composed of a metal coil-shaped spring. The spring member 50 is housed inside the base member 10, and its upper end portion is housed inside the slider 40. The spring member 50 presses the slider 40 upward in a direction approaching the pressure receiving member 30 by its own elastic force. As a result, the cam portion 41 is in a state of pressing the first pressure receiving portion 31, and a force in a direction to open with respect to the base member 10 is applied to the rotating member 20.

[0021] The damper member 60 is provided on the base member 10 and is disposed inside the coil-shaped spring member 50 inside the base member 10. The damper member 60 includes a main body portion 61, a rod 62, and a cap 63.

[0022] The main body portion 61 has a cylindrical shape and is provided in a state where the lower part is press-fitted into the damper fixing portion 13 of the base member 10. The damper fixing portion 13 surrounds the outer peripheral surface of the main body portion 61 to hold the main body portion 61 and prevent the main body portion 61 from tilting in the vertical direction. The rod 62 is a member having a substantially cylindrical shape. The rod 62 protrudes upward from the main body portion 61 and advances and retracts with respect to the main body portion 61 along the vertical direction. The cap 63 has a cylindrical shape with a diameter larger than that of the rod 62, is provided at the tip of the rod 62, and moves in the vertical direction as the rod 62 advances and retracts with respect to the main body portion 61. The cap 63 can be inserted into the through hole 43 of the slider 40 and is movable along the vertical direction within the through hole 43.

[0023] When the upper end portion of the cap 63 is pressed by the second pressure receiving portion 32, the damper member 60 is configured such that the rod 62 moves downward with respect to the main body portion 61 and the rod 62 is pushed into the main body portion 61. The damper member 60 generates a reaction force as the rod 62 is pushed into the main body portion 61 and generates a buffering effect. The damper member 60 is composed of a general fluid damper. A lubricant is applied to the contact portion between the cap 63 of the damper member 60 and the second pressure receiving portion 32 to suppress wear. In the configuration where the cap 63 is provided on the rod 62, the cap 63 is assumed to constitute a part of the rod 62. Further, the damper member 60 may be configured such that the upper end portion of the rod 62 is inserted into the through hole 43 of the slider 40 without the cap 63 and the tip portion of the rod 62 is pressed by the second pressure receiving portion 32.

[0024] When the opening and closing device 100 configured as described above is in the fully open state as shown in FIGS. 1 and 2, the slider 40 is pressed upward by the spring member 50, so the first pressure receiving portion 31 and the cam portion 41 of the slider 40 are in contact. Also, when the opening and closing device 100 is in the fully open state, the cap 63 of the damper member 60 does not protrude upward from the through hole 43 of the slider 40, so the second pressure receiving portion 32 and the cap 63 of the damper member 60 are not in contact. When the rotating member 20 is rotated in the closing direction from such a state, the first pressure receiving portion 31 presses the slider 40 downward via the cam portion 41. As a result, the slider 40 moves downward while compressing the spring member 50. As the slider 40 moves downward, the tip of the cap 63 of the damper member 60 protrudes upward from the through hole 43 of the slider 40 (see FIGS. 3 and 4). Thereby, the second pressure receiving portion 32 comes into contact with the tip of the cap 63 of the damper member 60. When the rotating member 20 is further rotated in the closing direction in such a state, as shown in FIGS. 5 and 6, as the slider 40 moves downward, at the same time, the tip of the cap 63 of the damper member 60 is pressed by the second pressure receiving portion 32, and the rod 62 is pushed into the main body portion 61. By thus pushing the rod 62 of the damper member 60 into the main body portion 61, a buffering effect by the damper member 60 is generated.

[0025] Here, the rotation axis 15, which is the rotation center of the rotating member 20, is disposed behind the cap 63 of the damper member 60. For this reason, when the rotating member 20 is rotated in the closing direction and the second pressure receiving portion 32 presses the cap 63 of the damper member 60, a load is applied to the cap 63 not only downward but also rearward. The opening and closing device 100 of the present embodiment includes an inclination prevention portion 44 that prevents the rod 62 from inclining rearward due to a rearward load being applied to the cap 63, which is the tip of the rod 62. Hereinafter, the inclination prevention portion 44 will be described.

[0026] The anti-tilting portion 44 is provided on the slider 40. Specifically, the anti-tilting portion 44 is constituted by the inner peripheral surface of the through-hole 43 of the slider 40. The through-hole 43 is configured such that the rear portion of the inner peripheral surface is orthogonal to the front-rear direction and is planar along the up-down direction. Hereinafter, this planar portion is referred to as the plane 45. The plane 45 is a plane parallel to the rotation axis 15 of the rotating member 20. As shown in FIG. 7, the through-hole 43 is substantially circular in plan view as viewed from the up-down direction, and is configured such that the distance from its center to the plane 45 substantially coincides with the distance from the central axis to the outer peripheral surface of the cylindrical cap 63. Further, the plane 45 is formed from the upper end portion to the lower end portion of the through-hole 43. Thereby, when the cap 63 of the damper member 60 is inserted into the through-hole 43, the plane 45 of the through-hole 43 and the cap 63 are in contact with each other. And the cap 63 moves in the up-down direction in a state of being in contact with the plane 45. For this reason, even if a rearward load is applied to the cap 63, the cap 63 is prevented from tilting rearward from the up-down direction. As a result, the rearward tilting of the rod 62 is also prevented.

[0027] Further, since the main body portion 61 of the damper member 60 is fixed by the damper fixing portion 13, it is possible to suppress the possibility that the rod 62 tilts with respect to the main body portion 61 due to the tilting of the main body portion 61 side and the movement of the rod 62 becomes unstable.

[0028] As described above, the anti-tilting portion 44 prevents the rod 62 of the damper member 60 from tilting with respect to the main body portion 61 of the damper member 60 when the rod 62 moves. For this reason, it is possible to stabilize the operation when the rod 62 of the damper member 60 is pressed by the second pressure receiving portion 32 and moves downward.

[0029] Further, in the present embodiment, the inner peripheral surface of the through-hole 43 is used as the anti-tilting portion 44 to prevent the rod 62 of the damper member 60 from tilting. For this reason, it is not necessary to separately provide a member in the through-hole 43, the manufacturing is easy, and an increase in cost can be suppressed.

[0030] Furthermore, by receiving it on the flat surface 45 against the outer peripheral surface (curved surface) of the cap 63 of the damper member 60, the contact portion between the flat surface 45 and the cap 63 can be reduced. For this reason, the sliding resistance between the flat surface 45 and the cap 63 during the movement of the cap 63 can be reduced. Also, since the contact portion with the cap 63 is small with respect to the length of the flat surface 45 in the left-right direction, even if the contact position is displaced in the left-right direction, the flat surface 45 continues to contact the cap 63, reliably preventing the cap 63 from tilting backward. For example, even when the slider 40 is displaced in the left-right direction when being pressed downward by the first pressure receiving portion 31, since the cap 63 contacts the flat surface 45, the tilting of the cap 63 is reliably prevented.

[0031] In the present embodiment, the inclination prevention portion 44 further includes a plurality of guide portions 46 (see FIGS. 7 to 9). The plurality of guide portions 46 project inward from the inner peripheral surface of the through hole 43 of the slider 40 and are provided along the circumferential direction of the inner peripheral surface. The plurality of guide portions 46 are formed from the upper end portion to the lower end portion of the through hole 43. The plurality of guide portions 46 contact the cap 63 when the cap 63 moves in the vertical direction, preventing the cap 63 from tilting in a direction other than the rearward direction. Note that the plurality of guide portions 46 project inward from the inner peripheral surface to such an extent that there is a slight gap between the guide portions 46 and the cap 63 of the damper member 60 inserted into the through hole 43. This gap only needs to be such that it does not prevent the vertical movement of the cap 63.

[0032] Note that, as shown in FIG. 6, in this embodiment, in the closed state where the rotating member 20 has completely rotated in the closing direction, in the moving direction (vertical direction) of the slider 40, the distance h1 from the contact portion between the second pressure receiving portion 32 and the tip of the rod 62 (the cap 63 in this embodiment) to the rotation axis of the rotating member 20 (the center of the rotation axis 15 in this embodiment) is shorter than the distance h2 from the contact portion between the pair of first pressure receiving portions 31 and the slider 40 to the rotation axis of the rotating member 20. Thus, in this embodiment, in the closed state, among the pressure receiving members 30, the second pressure receiving portion 32 that receives the load from the damper member 60 is closer to the rotation axis of the rotating member 20 in the vertical direction than the pair of first pressure receiving portions 31 that receive the load from the slider 40. Thereby, while suppressing an increase in the vertical dimension of the opening / closing device 100, the damper member 60 can be incorporated in the opening / closing device 100.

[0033] Also, in this embodiment, the cylindrical portion 42 of the slider 40 is cylindrical and is provided to protrude toward the pressure receiving member 30 side so that the inside thereof is connected to the through hole at the top of the slider 40. Further, the damper member 60 is provided such that the tip of the rod 62 (the cap 63 in this embodiment) protrudes from the cylindrical portion 42 toward the pressure receiving member 30 side and is pressed by the pressure receiving member 30. With such a configuration, when the tip of the rod 62 is pressed by the pressure receiving member 30, the tip of the rod 62 can be supported by the cylindrical portion 42 protruding toward the pressure receiving member 30 side. Thereby, it is possible to more reliably prevent the rod 62 from tilting. Also, since the cylindrical portion 42 protrudes toward the pressure receiving member 30 side, the space for accommodating the damper member 60 in the slider 40 can be increased as compared with the case where the cylindrical portion is provided inside the slider 40. Thereby, while suppressing an increase in the dimension of the opening / closing device 100, the dimension of the damper member 60 can be increased.

[0034] Also, in the present embodiment, in the closed state, at least a part of the cylindrical portion 42 is located between the pair of first pressure receiving portions 31. That is, in the present embodiment, in the closed state, the cylindrical portion 42 can be accommodated using the space between the pair of first pressure receiving portions 31. Thereby, while suppressing an increase in the size of the opening / closing device 100, it becomes possible to provide the cylindrical portion 42 for supporting the tip of the rod 62 so as to protrude toward the pressure receiving member 30 side.

[0035] Further, in the present embodiment, a planar portion intersecting the moving direction of the rod 62 is provided at the tip of the rod 62 (the cap 63 in the present embodiment), and the pressure receiving member 30 presses the planar portion of the rod 62. In the present embodiment, the planar portion is the tip surface of the cap 63 (the end surface on the rotating member 20 side). In this way, by forming the portion pressed by the pressure receiving member 30 at the tip of the rod 62 in a planar shape, the rod 62 can be smoothly pressed by the pressure receiving member 30. In particular, when the portion pressed by the pressure receiving member 30 at the tip of the rod 62 is formed in a planar shape perpendicular to the moving direction of the rod 62, a force in a direction parallel to the moving direction of the rod 62 can be efficiently applied from the pressure receiving member 30 to the rod 62. Thereby, it is possible to sufficiently prevent the rod 62 from tilting. When the cap 63 is not provided at the tip of the rod 62 as will be described later, the planar portion provided at the tip of the rod 62 is the tip surface of the rod 62 (the end surface on the rotating member 20 side).

[0036] In FIG. 7, the five guide portions 46 are arranged at the front, front right, rear right, front left, and rear left on the inner peripheral surface of the through hole 43, and the circumferential intervals are substantially equal, but it is not limited thereto. The number of the guide portions 46 is not limited to five, and may be appropriately configured according to specifications, applications, etc.

[0037] Further, the damper fixing portion 13 is not limited to being configured in a substantially cylindrical shape. For example, a part of the circumferential surface of the damper fixing portion 13 may be cut out, or it may be configured in a plurality of columnar shapes with the main body portion 61 of the damper member 60 disposed inside the plurality of columnar portions.

[0038] Also, the configuration in which the pressure receiving member 30 presses the slider 40 and the rod 62 of the damper member 60 is not limited to the above-described embodiment. For example, in the above-described slider 40, a cylindrical portion 42 is provided at its top, and it is configured to press a cap 63 protruding from the cylindrical portion 42. However, it may be configured to press the cap 63 protruding from the through-hole at the top of the slider 40 without providing the cylindrical portion 42. Further, in the closed state of the opening / closing device 100, the first pressure receiving portion 31 protrudes below the second pressure receiving portion 32, but the second pressure receiving portion 32 may protrude below the first pressure receiving portion 31, or they may have the same length. Furthermore, the damper member 60 may not include the cap 63, and the pressure receiving member 30 may be configured to directly press the tip of the rod 62 of the damper member 60. In this case, the size and the inclination prevention portion 44 of the through-hole 43 of the slider 40 are appropriately changed according to the diameter of the rod 62.

[0039] In the above-described embodiment, the case where the main body portion 61 of the damper member 60 is fixed to the cylindrical damper fixing portion 13 provided inside the base member 10 has been described. However, the method of fixing the damper member 60 to the base member 10 is not limited to the above example. For example, the damper member 60 may be fixed to the base member 10 by utilizing the elastic force of the spring member 50.

[0040] FIG. 10 is a diagram showing an example of a method for fixing the damper member 60 to the base member 10 by utilizing the elastic force of the spring member 50. In the example shown in FIG. 10, the damper fixing portion 13 (see FIG. 6) is not provided on the base member 10, and the flange portion 64 is provided on the main body portion 61 of the damper member 60. More specifically, the flange portion 64 is provided so as to protrude in a direction orthogonal to the moving direction of the rod 62 from the lower end portion of the main body portion 61 (the end portion on the bottom side of the base member 10). One end portion of the spring member 50 is supported by the top portion of the slider 40, and the other end portion of the spring member 50 is supported by the flange portion 64. With such a configuration, the flange portion 64 is pressed against the bottom side of the base member 10 by the elastic force of the spring member 50. Thereby, the main body portion 61 of the damper member 60 is fixed to the base member 10.

[0041] In the above-described embodiment, the case where the base member 10 and the main body portion 61 of the damper member 60 are separate members has been described. However, the main body portion 61 of the damper member 60 may be integrally formed with the base member 10.

[0042] Furthermore, the opening / closing device 100 may be configured such that the rotation shaft 15, the slider 40, the spring member 50, and the damper member 60 are directly provided on a connection target such as the main body of an OA device without including the base member 10, and the rotating member 20 is rotatably provided on the connection target such as the main body of the OA device. Also, the opening / closing device 100 may be configured such that a connection target such as a document pressing device of an OA device is rotatably provided on the base member 10 via the rotation shaft 15 without including the rotating member 20.

Explanation of Reference Numerals

[0043] 10 Base member 11 Opening 12 Support portion 13 Damper fixing portion 15 Rotation shaft 20 Rotating member 30 Pressure receiving member 31 First pressure receiving portion 32 Second pressure receiving portion 40 Slider 41 Cam portion 42 Cylindrical portion 43 Through hole 44 Anti-tilting portion 45 Flat surface 46 Guide portion 50 Spring member 60 Damper member 61 Body portion 62 Rod 63 Cap 64 Flange portion 100 Opening / closing device

Claims

1. An opening / closing device in which a rotating member is rotatably provided on a base member, and the rotating member rotates with respect to the base member to perform an opening / closing operation, a pressure receiving member provided on the rotating member and rotating together with the rotating member, a damper member provided on the base member, having a main body portion, and a rod that protrudes from the main body portion toward the pressure receiving member side and moves forward and backward with respect to the main body portion, a slide member having a through hole into which the rod is inserted, provided on the base member so as to be movable between the pressure receiving member and the main body portion, pressed toward the pressure receiving member side, and when the rotating member rotates in the closing direction, moved toward the main body portion side by being pressed by the pressure receiving member, comprising, the damper member, when the slide member moves toward the main body portion side, the tip of the rod protrudes from the through hole toward the pressure receiving member side, and the tip is pressed by the pressure receiving member to move the rod toward the main body portion side, thereby generating a buffering effect, the slide member, having an inclination prevention portion that prevents the rod from inclining with respect to the main body portion during the movement of the rod, an opening / closing device.

2. The inclination prevention portion is an inner peripheral surface of the through hole, and contacts the outer peripheral surface of the rod to prevent inclination. The opening / closing device according to Claim 1.

3. The pressure receiving member rotates together with the rotating member and presses the tip of the rod, the inclination prevention portion is formed along the through direction on the inner peripheral surface of the through hole, has a plane parallel to the rotation axis of the rotating member, and the plane contacts the outer peripheral surface of the rod on the rotation axis side of the rod to prevent the inclination of the rod toward the rotation axis side. The opening / closing device according to Claim 2.

4. The inclination prevention portion protrudes inward from the inner peripheral surface of the through hole, and a plurality of guide portions are provided along the circumferential direction of the inner peripheral surface to guide the movement of the rod. The opening / closing device according to Claim 1.

5. comprising a damper fixing portion provided on the base member and holding the main body portion of the damper member from the outer peripheral surface. The opening / closing device according to any one of Claims 1 to 4.

6. The pressure receiving member, a pair of first pressure receiving portions that press the slide member, and a second pressure receiving portion provided between the pair of first pressure receiving portions and pressing the rod of the damper member. having, The pair of first pressure-receiving portions and the second pressure-receiving portion are provided along the rotation axis of the rotating member, and the pair of first pressure-receiving portions protrude toward the slide member side from the second pressure-receiving portion. An opening / closing device according to any one of claims 1 to 4.

7. In a closed state where the rotating member has completely rotated in the closing direction, In the moving direction of the slide member, the distance from the contact portion between the second pressure-receiving portion and the tip of the rod to the rotation axis of the rotating member is shorter than the distance from the contact portion between the pair of first pressure-receiving portions and the slide member to the rotation axis of the rotating member. An opening / closing device according to claim 6.

8. The slide member is cylindrical and has a cylindrical portion that protrudes toward the pressure-receiving member side so that the inside thereof is connected to the through hole. The damper member has a tip of the rod protruding from the cylindrical portion toward the pressure-receiving member side and being pressed by the pressure-receiving member. An opening / closing device according to claim 7.

9. In the closed state, at least a part of the cylindrical portion is located between the pair of first pressure-receiving portions. An opening / closing device according to claim 8.

10. A planar portion intersecting the moving direction of the rod is provided at the tip of the rod of the damper member. The pressure-receiving member presses the planar portion of the rod. An opening / closing device according to any one of claims 1 to 4.

11. An electronic device including an opening / closing device according to any one of claims 1 to 4.

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