Opening / closing device and electronic device including the same

Abstract

To provide an opening / closing device which achieves improvement of strength, and to provide an electronic device including the opening / closing device.SOLUTION: A hinge 1 includes: a slider holding member 21; and a lift member 22 which houses the slider holding member 21 in a space enclosed by a pair of facing side surface parts 221 and a back surface part 222 and is rotatably connected to an end of the slider holding member 21 through a rotary shaft member 23 provided at a pair of side surface parts 211. In the hinge 1, the lift member 22 rotates in an opening direction where the back surface part 222 moves away from the slider holding member 21 and in a closing direction where the back surface part moves close to the slider holding member. The hinge 1 has, along an axial direction, a second slide member 42, a lift side pressure receiving member 24 which is pressed by the second slide member 42 pressed to the end side of the slider holding member 21; and inclination prevention parts 216 which are provided between the slider holding member 21 and the pair of side surface parts 221 and prevent the pair of side surface parts 221 from inclining toward each other.SELECTED DRAWING: Figure 9

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 and closing device that connects the main body and the cover so that they can be opened and closed. Patent Document 1 discloses an opening and closing device that can place a document to be read on the contact glass of a multifunction machine and bring the document into close contact with the contact glass regardless of the thickness of the document when the document pressing plate (cover) is closed.

[0003] The opening and closing device described in Patent Document 1 includes a mounting member that is attached to the main body of a copying machine, a support member that is rotatably connected to the mounting member, and a lift member that is rotatably connected to the support member and that mounts an original cover. This opening and closing device makes it possible to adjust the horizontal position of the original cover by rotating the lift member in a different direction from the support member. This allows the original placed on the contact glass to be pressed against the contact glass by the original cover. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-035180 A Summary of the Invention [Problem to be solved by the invention]

[0005] The opening and closing device described in Patent Document 1 reduces the rotation speed of a pin-shaped operating member provided on a lift member by pressing the pin-shaped operating member with a biased cam slider. This pin-shaped operating member may be curved when pressed in a direction perpendicular to the axial direction. If this occurs, the side surface of the lift member supporting the operating member may be pulled in the direction of curvature and tilt, possibly resulting in deformation. For this reason, it is desirable to improve the strength of the opening and closing device.

[0006] Therefore, an object of the present invention is to provide an opening and closing device with improved strength, and an electronic device including the same. [Means for solving the problem]

[0007] In order to achieve this object, the present invention provides an opening and closing device comprising a first rotating member having a rectangular cylindrical shape extending long in an axial direction, a pair of opposing side portions, and a second rotating member that houses the first rotating member in a space surrounded by a back portion connecting the pair of side portions, and is rotatably connected to an end of the first rotating member via a rotating shaft member provided on the pair of side portions, and in which the second rotating member rotates in an opening direction in which the back portion moves away from the first rotating member and in a closing direction in which the back portion moves toward the first rotating member, a slide member that is held by the first rotating member so as to be movable in a direction toward and away from the end of the first rotating member along the axial direction and is pressed toward the end of the first rotating member by an elastic force; a pressure receiving member provided to connect the pair of side portions at a position opposite to the back portion across the rotating shaft member, and pressed by the slide member pressed toward the end portion of the first rotating member; A tilt prevention portion provided between the first rotating member and the pair of side portions of the second rotating member, the tilt prevention portion preventing the pair of side portions from tilting toward each other; It is equipped with: Effect of the Invention

[0008] The present invention can improve the strength of a switching device. [Brief description of the drawings]

[0009] [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 perspective view of the slider holding member. [Diagram 5] FIG. 5 is a perspective view of the hinge in a lifted-up state. [Figure 6] FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. [Figure 7] FIG. 7 is a diagram showing a modified example of the tilt prevention portion. [Figure 8] FIG. 8 is a diagram showing a modified example of the tilt prevention portion. [Figure 9] FIG. 9 shows the hinge in a lifted-up state, with overlapping portions indicated by dashed lines. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The opening / closing device of the present invention will be described below with reference to the drawings. In the embodiment described below, the opening / closing device of the present invention will be described as a hinge that allows, for example, a document cover of a multifunction device to be opened and closed relative to a main body. Note that the opening / closing device of the present invention can be applied to any device that allows two members to be opened and closed, and is not limited to electronic devices.

[0011] 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, and Fig. 3 is a cross-sectional view taken along the line III-III in Fig. 1.

[0012] The hinge 1 of this embodiment is configured such that the rotating member 20, which is provided on the base member 10 via the rotating shaft member 15, can rotate around the rotating shaft member 15 as a fulcrum. In the following, 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. In addition, directions that are perpendicular to each other and perpendicular to the vertical direction are referred to as the front-rear direction and the left-right direction, respectively. The rotating member 20 rotates so as to be inclined in the front-rear direction. 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. Note that these directions do not limit the use state of the hinge 1.

[0013] The open state in Fig. 1 is a state in which the end of the rotating member 20 opposite the rotation fulcrum has rotated completely backward in the rotation direction of the rotating member 20. The closed state in Fig. 2 is a state in which the end of the rotating member 20 opposite the rotation fulcrum has rotated completely forward in the rotation direction of the rotating member 20.

[0014] (About the configuration of hinge 1) The hinge 1 includes a base member 10, a rotating member 20, a base side 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 FIG. 3.

[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 corresponds to the first rotating member of the present invention. The lift member 22 corresponds to the second rotating member of the present invention.

[0020] FIG. 4 is a perspective view of the slider holding member 21. As shown in FIG.

[0021] The slider holding member 21 is in the shape of a rectangular tube extending long in the axial direction X, and includes a pair of opposing side portions 211 and a back portion 212, and the surface opposing the back portion 212 forms an opening 213 cut out along the axial direction. A first slide member 41, a second slide member 42, and an elastic member 50, which will be described later, are housed inside the slider holding member 21, and as shown in Fig. 1, they are exposed forward from the opening 213 when the hinge 1 is in the open state. The slider holding member 21 is formed by bending a single metal plate.

[0022] A shaft hole 214 is provided at one end of each of the pair of side portions 211 in the axial direction X. A cylindrical rotating shaft member 15 is inserted into the shaft hole 214. The slider holding member 21 is connected to the base member 10 via the rotating shaft member 15 inserted into this shaft hole 214, and is rotatable about the rotating shaft member 15 as a fulcrum.

[0023] Further, each of the pair of side portions 211 has a shaft hole 215 at the other end in the axial direction X. A cylindrical rotating shaft member 23 is inserted into the shaft hole 215. A lift member 22, which will be described later, is connected to the slider holding member 21 via the rotating shaft member 23 inserted into this shaft hole 215, and is rotatable about the rotating shaft member 23 as a fulcrum.

[0024] Further, each of the pair of side surface portions 211 is provided with a tilt prevention portion 216. The tilt prevention portion 216 is formed on the outer surface of the pair of side surface portions 211 so as to protrude outward. Specifically, the slider holding member 21 is disposed inside the lift member 22, and the pair of side surface portions 211 face a pair of side surface portions 221 of the lift member 22 described later. The tilt prevention portion 216 is formed on the surface of the pair of side surface portions 211 facing the pair of side surface portions 221 of the lift member 22 so as to protrude toward the pair of side surface portions 221 of the lift member 22. As will be described in detail later, the tilt prevention portion 216 serves the function of preventing the pair of side surface portions 221 of the lift member 22 from tilting inward.

[0025] Returning to Figs. 1 to 3, the lift member 22 has a pair of opposing side portions 221 and a back portion 222 connecting the pair of side portions 221. The lift member 22 is capable of housing the slider holding member 21 in a space surrounded by the pair of side portions 221 and the back portion 222. A rotating shaft member 23 is provided on the pair of side portions 221. The lift member 22 is connected to the slider holding member 21 via the rotating shaft member 23, and is capable of rotating relative to the slider holding member 21 with the rotating shaft member 23 as a fulcrum. The surface of the lift member 22 facing the back portion 222 is open, and the slider holding member 21 moves in and out of the lift member 22 via this open portion when rotating.

[0026] The lift member 22 can rotate in an opening direction and a closing direction. The opening direction is the direction in which the rear portion 222 of the lift member 22 approaches the slider holding member 21. The closing direction is the direction in which the rear portion 222 of the lift member 22 moves away from the slider holding member 21. The action of the lift member 22 rotating in the opening direction is called a lift-up action, and the state in which the lift member 22 has fully rotated in the opening direction is called a lift-up state. FIG. 5 is a perspective view of the hinge 1 in the lift-up state. FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5.

[0027] As shown in Fig. 5, the lift member 22 in the lifted-up state has the same posture as the lift member 22 in the closed state. When the hinge 1 is applied to a multifunction printer, this lift member 22 is fixed to the document cover. In other words, when the hinge 1 is in the lifted-up state, the document cover can maintain a horizontal direction. This allows the entire document placed on the document reading unit (contact glass) to be pressed down from above with uniform pressure, so that the document can be brought into close contact with the document reading unit.

[0028] The lift member 22 is provided with a lift-side pressure-receiving member 24. The lift-side pressure-receiving member 24 has a cylindrical shape, and is provided so as to connect the pair of side portions 221 at a position opposite to the back portion 222 across the rotating shaft member 23 when viewed from the left-right direction. The lift-side pressure-receiving member 24 is held by the slider holding member 21, and is adapted to be pressed by a second slide member 42 (described later) pressed toward the end side (the rotating shaft member 23 side) of the slider holding member 21.

[0029] The base-side 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 base-side pressure-receiving member 30 is configured to be pressed by a first slide member 41 (to be described later) held by the slider holding member 21. The base-side pressure-receiving member 30 is not limited to a cylindrical shape, and may have any shape that can be pressed by the first slide member 41.

[0030] 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 a direction approaching and moving away from the base side pressure receiving member 30. The first slide member 41 is pressed against the base side pressure receiving member 30 by the elastic force of an elastic member 50 described below. When the slider holding member 21 rotates, the first slide member 41 rotates together with the slider holding member 21 while sliding against the base side pressure receiving member 30. The first slide member 41 is cylindrical with one end closed, and the one end is on the base side pressure receiving member 30 side and is arranged to contact the base side pressure receiving member 30.

[0031] Although detailed explanation will be omitted, when the slider holding member 21 rotates and transitions between the state shown in Figure 1 and the state shown in Figure 2, the first slide member 41 presses the base side pressure-receiving member 30, thereby suppressing the rotational speed of the slider holding member 21.

[0032] The second slide member 42 is held by the slider holding member 21, similarly to the first slide member 41. The second slide member 42 is movable along the longitudinal direction of the slider holding member 21 in a direction approaching and moving away from the lift-side pressure-receiving member 24. The second slide member 42 is pressed against the lift-side pressure-receiving member 24 by the elastic force of an elastic member 50, which will be described later. When the slider holding member 21 rotates, the second slide member 42 rotates together with the slider holding member 21 while sliding against the lift-side pressure-receiving member 24. The second slide member 42 is cylindrical 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.

[0033] 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 second slide member 42. 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 base side 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.

[0034] 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.

[0035] (About the lift-up operation of hinge 1) The lift-up operation of the hinge 1 configured as above will be described below with reference to Figures 3 and 6. The lift-up operation refers to the operation of the lift member 22 rotating in the opening direction so that the hinge 1 changes from the open state shown in Figure 1 to the lift-up state shown in Figure 5.

[0036] When the hinge 1 transitions from the state shown in Fig. 3 to the lift-up state shown in Fig. 6, the lift member 22 rotates in the opening direction with the rotating shaft member 23 as a fulcrum. At this time, the lift-side pressure-receiving member 24 rotates with the rotating shaft member 23 as a fulcrum while sliding on the second slide member 42. When pressed by the lift-side pressure-receiving member 24, the second slide member 42 tries to move in a direction away from the lift-side pressure-receiving member 24, but the elastic force of the elastic member 50 causes the second slide member 42 to press back against the lift-side pressure-receiving member 24. In other words, when the lift member 22 rotates in the opening direction, the rotational speed of the lift member 22 is suppressed by the braking action.

[0037] In addition, when the lift-side pressure-receiving member 24 is pressed by the second slide member 42, a force in the closing direction acts on the lift member 22 rotating in the closing direction. Therefore, the lift member 22 becomes easier to rotate in the closing direction, and the hinge 1 becomes easier to return from the state in FIG. 6 to the state in FIG. 3.

[0038] (Regarding tilt prevention portion 216) As described above, during the lift-up operation, the lift-side pressure-receiving member 24 is pressed by the second slide member 42. This pressing force may cause the lift-side pressure-receiving member 24 to bend toward the opposite side to the second slide member 42. At this time, the pair of side surface portions 221 of the lift member 22 supporting the lift-side pressure-receiving member 24 are pulled in the bending direction and incline toward each other. Tilt prevention portions 216 are provided in the inclination direction of the pair of side surface portions 221, and even if the pair of side surface portions 221 of the lift member 22 inclines, they are supported by the tilt prevention portions 216 and are prevented from inclining. As a result, the pair of side surface portions 221 do not bend inward, and the strength of the hinge 1 is improved.

[0039] 4, the tilt prevention portion 216 is provided near the shaft hole 215 and has a generally L-shape extending in the axial direction X and in a direction perpendicular to the axial direction X, but is not particularly limited to this shape. FIGS. 7 and 8 are diagrams showing modified examples of the tilt prevention portion 216.

[0040] Tilt prevention portion 216 may be connected via back surface portion 212 as shown in Fig. 7. Tilt prevention portion 216 may be shaped like a triangle with rounded corners as shown in Fig. 8. Tilt prevention portion 216 may be shaped like a straight line, or may be interrupted midway. Tilt prevention portion 216 may be configured by part of side surface portion 211 protruding outward, or may be configured as a separate member from side surface portion 211.

[0041] Furthermore, it is preferable that the tilt prevention portion 216 is provided at a position where it is not exposed in the left-right direction during the lift-up operation. Fig. 9 is a diagram showing the hinge 1 in the lift-up state, with the overlapping portion indicated by a dashed line. As shown in Fig. 9, the tilt prevention portion 216 is provided at a position on the pair of side portions 211 of the slider holding member 21 that faces the pair of side portions 221 of the lift member 22 in the lift-up state where the lift member 22 has fully rotated in the opening direction. In this way, by preventing the tilt prevention portion 216 from being exposed in the lift-up state, the design of the hinge 1 is not impaired.

[0042] Furthermore, if the amount of protrusion of the tilt prevention portion 216 is large, the lift member 22 will come into contact with the tilt prevention portion 216 and be prevented from rotating. Therefore, it is preferable that the amount of protrusion of the tilt prevention portion 216 be such that the rotation of the lift member 22 is not prevented.

[0043] The tilt prevention portion 216 may be provided on a pair of side surface portions 221 of the lift member 22. In this case, the tilt prevention portion 216 may be provided in an area of ​​the pair of side surface portions 221 that faces the pair of side surface portions 211 of the slider holding member 21. When provided on the lift member 22 side, the tilt prevention portion 216 is not exposed in the left-right direction even in the lifted-up state, and therefore the degree of freedom in the position or size of the tilt prevention portion 216 is improved. [Explanation of symbols]

[0044] 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: Rotating shaft member 24: Lift side pressure-receiving member 30: Base side pressure-receiving member 41: First slide member 42: Second slide member 50: Elastic material 211: Side part 212: Back part 213: Opening 214, 215: Shaft hole 216: Tilt prevention part 221: Side part 222: Back part

Claims

1. An opening and closing device comprising: a first rotating member having a rectangular cylindrical shape extending long in an axial direction; a pair of opposing side surfaces; and a second rotating member that houses the first rotating member in a space surrounded by a back surface connecting the pair of side surfaces, and is rotatably connected to an end of the first rotating member via a rotating shaft member provided on the pair of side surfaces, wherein the second rotating member rotates in an opening direction in which the back surface moves away from the first rotating member and in a closing direction in which the back surface moves toward the first rotating member, a slide member that is held by the first rotating member so as to be movable in a direction toward and away from the end of the first rotating member along the axial direction and is pressed toward the end of the first rotating member by an elastic force; a pressure receiving member provided to connect the pair of side portions at a position opposite to the back portion across the rotating shaft member, and pressed by the slide member pressed toward the end portion of the first rotating member; A tilt prevention portion provided between the first rotating member and the pair of side portions of the second rotating member, the tilt prevention portion preventing the pair of side portions from tilting toward each other; An opening and closing device comprising:

2. The tilt prevention portion is The first rotating member is provided so as to protrude from a surface of the first rotating member facing the pair of side surface portions of the second rotating member toward the pair of side surface portions. The opening and closing device according to claim 1 .

3. The tilt prevention portion is The second rotating member is provided at a position facing the pair of side surfaces of the second rotating member when the second rotating member is fully rotated in the opening direction. The opening and closing device according to claim 2 .

4. The tilt prevention portion is provided on the pair of side surfaces of the second rotating member facing the first rotating member, The opening and closing device according to claim 1 .

5. 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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