opening and closing mechanism

Abstract

An opening and closing mechanism includes an opening and closing member having a rotating portion on a rotating shaft, and a cam member disposed opposite the rotating portion of the opening and closing member on the rotating shaft to apply a load to rotation of the rotating portion, wherein one of the cam member and the rotating portion has at least one first cam hill provided on a first circumference centered on the rotating shaft, and at least one second cam hill provided on a second circumference centered on the rotating shaft and having a larger radius than the first circumference, and the other of the cam member and the rotating portion has a sliding surface for the first cam hill and the second cam hill to slide, has a first angle range in which the first cam hill slides on the sliding surface and the second cam hill does not slide on the sliding surface, and has a second angle range in which the second cam hill slides on the sliding surface and the first cam hill does not slide on the sliding surface.

Description

Technical Field

[0001] This invention relates to an opening and closing mechanism. Background Technology

[0002] In the following patent document 1, regarding a hinge device, the following technology is disclosed: by providing a protrusion on the surface of the cam component and a recess on the surface of the bracket, the frictional torque can be varied according to the rotation angle of the bracket.

[0003] Patent Document 1: International Publication No. 2012 / 111634 Summary of the Invention

[0004] <Problem to be solved by this invention>

[0005] However, in conventional technology, in two sliding parts, since the sliding part is always the fixed part regardless of the rotation angle, the sliding part will wear relatively early, raising concerns about reduced sliding torque or loosening.

[0006] To address the aforementioned problems, the present invention aims to provide an opening and closing mechanism that can improve the wear resistance of the sliding part.

[0007] <Methods for solving problems>

[0008] To address the aforementioned problems, one embodiment of the opening and closing mechanism includes: an opening and closing member having a rotating portion on a rotation axis; and a cam member disposed on the rotation axis opposite to the rotating portion of the opening and closing member, applying a load to the rotation of the rotating portion. One of the cam member and the rotating portion has: at least one first cam bevel disposed on a first circumference centered on the rotation axis; and at least one second cam bevel disposed on a second circumference centered on the rotation axis with a radius larger than the first circumference. The other member of the cam member and the rotating portion has a sliding surface for sliding of the first cam bevel and the second cam bevel. The opening and closing mechanism has a first angle range and a second angle range. In the first angle range, the first cam bevel slides on the sliding surface while the second cam bevel does not slide on the sliding surface. In the second angle range, the second cam bevel slides on the sliding surface while the first cam bevel does not slide on the sliding surface.

[0009] <The Effects of the Invention>

[0010] According to one embodiment of the opening and closing mechanism, an opening and closing mechanism that can improve the wear resistance of the sliding part can be provided. Attached Figure Description

[0011] Figure 1 This is a diagram illustrating the opening and closing operation of a display device according to one embodiment.

[0012] Figure 2 This is a perspective view of the opening and closing mechanism of one implementation method.

[0013] Figure 3 This is an exploded perspective view of the opening and closing mechanism of one implementation method.

[0014] Figure 4 This is a diagram illustrating the opening and closing operation of an opening and closing mechanism in one embodiment.

[0015] Figure 5 This is a perspective view of the rotating part of the bracket and the second cam component included in one embodiment of the opening and closing mechanism.

[0016] Figure 6 This is a diagram showing the positional relationship between the rotating part of the bracket and the cam plate in an opening and closing mechanism of one embodiment (when the opening and closing position of the bracket is in the closed position P1).

[0017] Figure 7 This is a diagram showing the positional relationship between the rotating part of the bracket and the cam in an opening and closing mechanism according to one embodiment (when the opening and closing position of the bracket is at the torque generation position P2).

[0018] Figure 8 This is a diagram showing the positional relationship between the rotating part of the bracket and the cam plate in an opening and closing mechanism according to one embodiment (when the opening and closing position of the bracket is in the locking position P3).

[0019] Figure 9 This is a diagram showing the positional relationship between the rotating part of the bracket and the cam plate in an opening and closing mechanism according to one embodiment (when the opening and closing position of the bracket is in the locking position P4).

[0020] Figure 10 This is a diagram showing the positional relationship between the rotating part of the bracket and the cam plate in an opening and closing mechanism of one embodiment (when the opening and closing position of the bracket is in the locking position P5).

[0021] Figure 11 This is a diagram showing the positional relationship between the rotating part of the bracket and the cam in an opening and closing mechanism according to one embodiment (when the opening and closing position of the bracket is within the sliding torque range R1).

[0022] Figure 12 This is a diagram showing the positional relationship between the rotating part of the bracket and the cam plate in an opening and closing mechanism according to one embodiment (when the bracket is in the open position P6).

[0023] Figure 13 This is a diagram showing the sliding portion of the cam in the rotating part of the bracket of an opening and closing mechanism according to one embodiment.

[0024] Figure 14It is a chart showing the results of previous durability tests on opening and closing mechanisms.

[0025] Figure 15 This is a graph showing the results of a durability test of an opening and closing mechanism according to one embodiment. Detailed Implementation

[0026] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0027] (The opening and closing action of display device 10)

[0028] Figure 1 This diagram illustrates the opening and closing operation of a display device 10 according to one embodiment. It should be noted that, for convenience, in this embodiment, the X-axis direction is set to the left-right direction, the Y-axis direction to the front-back direction, and the Z-axis direction to the up-down direction.

[0029] like Figure 1 As shown, the display device 10 is installed on the ceiling 20 of the interior of a vehicle such as an automobile. The display device 10 includes a display 12 with a thin rectangular shape. The display 12 has a display surface 12A capable of displaying various images (e.g., a liquid crystal display, an organic EL display, etc.). The display device 10 has a rotation axis AX extending linearly in the left-right direction (X-axis direction) near the upper end of the display 12. The display 12 can be opened and closed by rotating about the rotation axis AX.

[0030] The display 12 is configured to open and close between the closed position P1 (opening / closing angle 0°) and the open position P6 (opening / closing angle 180°), with the display surface 12A facing upwards and the top surface 20 horizontally behind the rotation axis AX.

[0031] In the closed position P1, the opening and closing action of the display 12 is locked by a locking mechanism (not shown). Furthermore, if the user operates the locking lever (not shown) or similar mechanism to release the locking mechanism while the display 12 is in the closed position P1, it will slightly rotate to the torque-generating position P2 under its own weight. This creates a gap between the display 12 and the top surface 20 in the display device 10, allowing the user to easily grip the display 12.

[0032] The display 12 has three locking positions P3, P4, and P5 between the torque generation position P2 and the open position P6. By fixing the display 12 in any of the three locking positions P3, P4, and P5, passengers located behind the display 12 (in the negative Y-axis direction) can view various images displayed on the display surface 12A.

[0033] Furthermore, the display 12 has a sliding torque range R1 between the locked position P5 and the open position P6. The sliding torque range R1 is the range within which the display 12 opens and closes while applying a constant sliding resistance. Therefore, within the sliding torque range R1, the display 12 can maintain a stopped state at any opening or closing angle under the action of the applied sliding resistance when the user releases their hand at any opening or closing angle.

[0034] It should be noted that the display device 10 includes Figure 2 The opening and closing mechanism 100 will be described later. The opening and closing mechanism 100 is capable of opening and closing while the display 12 is held in place. Thus, the display device 10 realizes the opening and closing operation of the display 12.

[0035] In addition, the display device 10 actually includes a pair of opening and closing mechanisms 100 that are symmetrical to each other, and adopts a structure that holds the left and right sides of the display 12 by the pair of opening and closing mechanisms 100.

[0036] (Structure of opening and closing mechanism 100)

[0037] Figure 2 This is a perspective view of the opening and closing mechanism 100 according to one embodiment. Figure 3 This is an exploded perspective view of the opening and closing mechanism 100 of one embodiment.

[0038] like Figure 2 as well as Figure 3 As shown, the opening and closing mechanism 100 includes a bracket 110, a shaft 120, a support 130, a first cam component 140A, a second cam component 140B, a pressure plate 150, and a disc spring 160.

[0039] The bracket 110 is fixed to the mounting surface 22 located on the top surface 20 (see...). Figure 4The bracket 110 is a component that supports the shaft 120. The bracket 110 has an L-shape formed by bending the upper part of a vertical metal plate at a right angle towards the inner side in the left-right direction (X-axis direction). The bracket 110 has a horizontal wall portion 111 and a vertical wall portion 112. The horizontal wall portion 111 is a plate-like portion fixed to the mounting surface 22 in a state parallel to the top surface 20. For example, in this embodiment, the horizontal wall portion 111 has two through holes 111A formed therethrough in the vertical direction (Z-axis direction), and is fastened to the mounting surface 22 by two fixing screws (not shown) passing through the two through holes 111A. The vertical wall portion 112 is a plate-like portion that hangs downward from the outer edge of the horizontal wall portion 111 in the left-right direction (X-axis direction) and is perpendicular to the top surface 20. An insertion hole 112A is formed on the rotation axis AX in the vertical wall portion 112, extending through the vertical wall portion 112 in the left-right direction (X-axis direction). The vertical wall portion 112 supports the end portion of the shaft 120 by inserting it into the insertion hole 112A. In this embodiment, stainless steel is used as an example of the material of the support 110. However, the material of the support 110 is not limited to stainless steel.

[0040] Shaft 120 is a shaft-shaped (generally cylindrical) component disposed on the rotation axis AX and extending axially along the rotation axis AX. Shaft 120 supports bracket 130 for rotatability. Shaft 120 has an insert portion 121 at its end (the outer end in the left-right direction (X-axis direction)) with the same shape as the insert hole 112A of bracket 110. Shaft 120 is fixed to and supported by vertical wall portion 112 of bracket 110 by inserting the insert portion 121 into the insert hole 112A. It should be noted that the insert hole 112A of bracket 110 and the insert portion 121 of shaft 120 have an elongated oval shape. As a result, shaft 120 is prevented from rotating about the rotation axis AX. A disc-shaped flange portion 122 is formed in the central part of shaft 120, thereby locally enlarging its diameter. Furthermore, the shaft 120 has an insert portion 123 at its top end (the inner end in the left-right direction (X-axis direction)) that has the same shape as the insert hole 151 of the pressure plate 150. In this embodiment, stainless steel is used as an example of the material of the shaft 120. However, the material of the shaft 120 is not limited to stainless steel.

[0041] The bracket 130 is an example of an "opening and closing component". The bracket 130 is a component that rotates about the rotation axis AX while holding the display 12, thereby causing the display 12 to open and close. The bracket 130 has a rotating part 131 and a holding part 132.

[0042] The rotating part 131 is an annular and plate-shaped portion disposed on the rotating shaft AX, and it rotates around the rotating shaft AX in conjunction with the opening and closing action of the bracket 130. A circular opening 131A centered on the rotating shaft AX is formed in the center of the rotating part 131. The bracket 130 is rotatable by being supported by the shaft 120 inserted into the opening 131A.

[0043] The holding part 132 is an arm-shaped portion extending linearly outward from the rotating part 131 in the radial direction, and it is the part that holds the display 12 and rotates together with the rotating part 131. The holding part 132 has an L-shape formed by bending the upper part of a vertical metal plate at a right angle inward in the left-right direction (X-axis direction). The holding part 132 has a vertical wall part 132A and a horizontal wall part 132B. The vertical wall part 132A is a vertical elongated plate-shaped portion extending linearly outward from the rotating part 131 in the radial direction. The horizontal wall part 132B is an elongated plate-shaped portion that expands inward in the left-right direction (X-axis direction) from the upper edge of the vertical wall part 132A. The back of the display 12 is fixed to the upper surface of the horizontal wall part 132B by any fixing device. When the bracket 130 is in the closed position P1, the horizontal wall part 132B becomes horizontal (i.e., parallel to the top surface 20). Therefore, when the bracket 130 is in the closed position P1, the horizontal wall portion 132B can make the display 12 horizontal along the top surface 20.

[0044] In this embodiment, stainless steel is used as an example of the material for bracket 130. However, the material of bracket 130 is not limited to stainless steel.

[0045] The first cam component 140A and the second cam component 140B are arranged opposite each other on the rotation axis AX in such a way that the rotating part 131 of the bracket 130 is sandwiched in the middle. Both the first cam component 140A and the second cam component 140B are disc-shaped components with a circular opening 141 centered on the rotation axis AX in the center, and they have a left-right symmetrical shape.

[0046] Specifically, the first cam component 140A is configured to be non-rotatable relative to the outer surface of the rotating part 131 in the left-right direction (X-axis direction), i.e., the first sliding surface 131B, by inserting the shaft 120 into the opening 141, and sliding on the first sliding surface 131B as the rotating part 131 rotates, thereby applying a load to the rotation of the rotating part 131.

[0047] On the other hand, the second cam component 140B applies a load to the rotation of the rotating part 131 by inserting the shaft 120 into the opening 141 and configuring it to be non-rotatable relative to the inner surface of the rotating part 131 in the left-right direction (X-axis direction), namely the second sliding surface 131C.

[0048] In other words, the opening and closing mechanism 100 of this embodiment can apply a load to the rotation of the rotating part 131 by having the first cam member 140A and the second cam member 140B clamp the rotating part 131.

[0049] The first cam component 140A and the second cam component 140B each have two first cam ridges 142 and two second cam ridges 143 protruding toward the rotating part 131 on their surfaces opposite to the rotating part 131. The two first cam ridges 142 are arranged at 180° intervals on a first circumference centered on the rotation axis AX on the surface opposite to the rotating part 131. The two second cam ridges 143 are arranged at 180° intervals on a second circumference centered on the rotation axis AX and having a radius larger than the first circumference on the surface opposite to the rotating part 131.

[0050] In this embodiment, carbon steel is used as an example of the material for the first cam component 140A and the second cam component 140B. However, the material for the first cam component 140A and the second cam component 140B is not limited to carbon steel.

[0051] The pressure plate 150 is a disc-shaped component fixed to the top end of the shaft 120. An insertion hole 151 extending through the pressure plate 150 in the left-right direction (X-axis direction) is formed in the center of the pressure plate 150. The pressure plate 150 is fixed to the top end of the shaft 120 and cannot rotate by inserting the top end (insertion portion 123) of the shaft 120 into the insertion hole 151. Thus, the pressure plate 150 prevents the bracket 130, the first cam member 140A, the second cam member 140B, and the disc spring 160 from falling off the shaft 120. In this embodiment, stainless steel is used as an example of the material for the pressure plate 150. However, the material of the pressure plate 150 is not limited to stainless steel.

[0052] The disc spring 160 is an example of an "elastic component". The disc spring 160 is a disc-shaped component with a centrally located circular opening 161 centered on the rotation axis AX and exhibiting elasticity in the axial direction (X-axis direction) of the rotation axis AX. The disc spring 160 is disposed on the rotation axis AX and applies force to the first cam component 140A and the second cam component 140B on the rotating portion 131 side of the bracket 130.

[0053] Specifically, without the disc spring 160, a gap (hereinafter referred to as "outer gap") is formed between the first cam member 140A and the flange portion 122 of the shaft 120. Thus, the first cam member 140A is configured to be able to move the outer gap by the amount of the outer gap in the axial direction (X-axis direction) of the rotation axis AX.

[0054] A disc spring 160 is positioned on the rotating shaft AX by inserting the shaft 120 into the outer gap between the first cam member 140A and the flange 122 of the shaft 120, through which the shaft 120 is inserted into the opening 161. Thus, the disc spring 160 applies force to the first cam member 140A towards the rotating portion 131 of the bracket 130. Under this force, the first cam member 140A is pressed against the first sliding surface 131B of the rotating portion 131 of the bracket 130, thereby applying a load to the rotational force of the rotating portion 131. That is, in the opening and closing mechanism 100 of this embodiment, by adjusting the force (number of discs, thickness, spring constant, etc.) of the disc spring 160 between the first cam member 140A and the flange 122 of the shaft 120, the load applied by the rotational force of the first cam member 140A to the rotating portion 131 can be adjusted. For example, in… Figure 3 In the example shown, by providing two disc springs 160 between the first cam component 140A and the flange portion 122 of the shaft 120, the load of the rotational force applied to the rotating portion 131 by the first cam component 140A is appropriately adjusted.

[0055] It should be noted that when the rotating part 131 of the bracket 130 rotates, when the load is applied to the first cam member 140A from the rotating part 131, the disc spring 160 contracts in the axial direction (X-axis direction) of the rotating shaft AX, thereby being able to moderately absorb the force of the first cam mountain 142 and the second cam mountain 143 of the first cam member 140A pressing the rotating part 131.

[0056] Furthermore, without the disc spring 160, a gap (hereinafter referred to as "inner gap") is formed between the second cam member 140B and the pressure plate 150. Thus, the second cam member 140B is configured to be able to move this inner gap by an amount in the axial direction (X-axis direction) of the rotation axis AX.

[0057] A disc spring 160 is positioned on the rotating shaft AX by inserting a shaft 120 into the opening 161 within the inner gap formed between the second cam member 140B and the pressure plate 150. Consequently, the disc spring 160 applies force to the second cam member 140B towards the rotating portion 131 of the bracket 130. Under this force, the second cam member 140B is pressed against the second sliding surface 131C of the rotating portion 131 of the bracket 130, thereby applying a load to the rotational force of the rotating portion 131. In other words, in the opening and closing mechanism 100 of this embodiment, the load applied by the second cam member 140B to the rotating portion 131 by adjusting the force (number of discs, thickness, spring constant, etc.) of the disc spring 160 between the second cam member 140B and the pressure plate 150 can be adjusted. For example, in… Figure 3 In the example shown, by providing two disc springs 160 between the second cam component 140B and the pressure plate 150, the load applied by the rotational force of the second cam component 140B to the rotating part 131 is appropriately adjusted.

[0058] It should be noted that when the rotating part 131 of the bracket 130 rotates, when the load is applied to the second cam member 140B from the rotating part 131, the disc spring 160 contracts in the axial direction (X-axis direction) of the rotating shaft AX, thereby being able to moderately absorb the force of the first cam mountain 142 and the second cam mountain 143 of the second cam member 140B pressing the rotating part 131.

[0059] (The opening and closing action of the opening and closing mechanism 100)

[0060] Figure 4 This diagram illustrates the opening and closing operation of the opening and closing mechanism 100 according to one embodiment. It should be noted that... Figure 4 Positions P1 to P6 shown are Figure 1 The positions shown correspond to P1 to P6.

[0061] like Figure 4 As shown, in the opening and closing mechanism 100, the horizontal wall portion 111 of the bracket 110 is fixed to a mounting surface 22, which is above the top surface 20, inside the vehicle interior of a vehicle such as an automobile. In the opening and closing mechanism 100, the rotating portion 131 of the bracket 130 is supported by the shaft 120 and is rotatable. As a result, the bracket 130 rotates about the rotation axis AX, enabling opening and closing operations.

[0062] For the bracket 130, the holding part 132 of the display 12 is set to a closed position P1 (opening / closing angle 0°) in which it is horizontal along the setting surface 22 at a position further back than the rotation axis AX, and the holding part 132 is set to an open position P6 (opening / closing angle 180°) in which it is horizontal along the setting surface 22 at a position further forward than the rotation axis AX, and it can open and close between the closed position P1 and the open position P6.

[0063] Under its own weight, the bracket 130 can rotate slightly from the closed position P1 to the torque generation position P2.

[0064] The opening and closing mechanism 100 has three locking positions P3, P4, and P5 between the torque generation position P2 and the open position P6.

[0065] Furthermore, the opening and closing mechanism 100 has a sliding torque range R1 between the locked position P5 and the open position P6. The sliding torque range R1 is the range within which the bracket 130 performs opening and closing actions while applying a constant sliding resistance. Therefore, within the sliding torque range R1, the bracket 130 can maintain a stopped state at any opening and closing angle under the action of the applied sliding resistance, even when the user releases their hand at any opening and closing angle.

[0066] The opening and closing mechanism 100 is configured to perform the aforementioned opening and closing actions, thereby enabling... Figure 1 The opening and closing action of the display 12 shown.

[0067] (Specific structure of the rotating part 131 of the bracket 130 and the second cam component 140B)

[0068] Figure 5 This is a perspective view of the opening and closing mechanism 100 according to one embodiment, including the rotating part 131 of the bracket 130 and the second cam component 140B.

[0069] like Figure 5 As shown, the second cam component 140B has two first cam hills 142 and two second cam hills 143 protruding toward the rotating part 131 on its surface 140Ba opposite to the rotating part 131.

[0070] Two first cam ridges 142 are arranged at 180° intervals on a first circumference C1 centered on the rotation axis AX in a surface 140Ba. Specifically, in Figure 5 In the example shown, the two first cam peaks 142 are located at the position with the smallest radius in the surface 140Ba.

[0071] Two second cam ridges 143 are arranged at 180° intervals on a second circumference C2, centered on the rotation axis AX, with a radius larger than that of the first circumference C1. Specifically, in Figure 5 In the example shown, the two second cam peaks 143 are located at the position with the largest radius in the surface 140Ba.

[0072] The first cam hill 142 and the second cam hill 143 are at different heights. In this embodiment, the first cam hill 142 is higher than the second cam hill 143.

[0073] It should be noted that, in this embodiment, the first cam hill 142 and the second cam hill 143 are approximately rectangular in top view. Moreover, in this embodiment, two of the circumferential sides of the first cam hill 142 and the second cam hill 143 are conical, thereby enabling them to smoothly cross onto the steps of the rotating part 131 described later.

[0074] On the other hand, such as Figure 5 As shown, in the first sliding surface 131B of the bracket 130 opposite to the first cam component 140A, a pair of suppression portions 131D and a pair of avoidance portions 131E are respectively provided at 180° intervals on the first circumference C1.

[0075] The suppressing portion 131D is formed in a concave shape and is configured to suppress the sliding load of the first cam 142 when the bracket 130 is in the closed position P1 and the torque generating position P2. Therefore, the suppressing portion 131D has an angular range on the first circumference C1 corresponding to the angle between the closed position P1 and the torque generating position P2, and is formed in a fan shape.

[0076] The avoidance portion 131E is formed in the shape of a notch, which is configured to avoid the sliding of the first cam hill portion 142 when the bracket 130 is in the open / closed position between the locking position P3 and the locking position P5. Therefore, the avoidance portion 131E has an angular range on the first circumference C1 corresponding to the angle between the locking position P3 and the locking position P5, and is formed in the shape of a fan.

[0077] In addition, such as Figure 5 As shown, in the first sliding surface 131B of the bracket 130 opposite to the first cam component 140A, on the second circumference C2, there are a pair of avoidance portions 131F, a pair of first fitting portions 131G1, a pair of second fitting portions 131G2, and a pair of third fitting portions 131G3, which are respectively provided at 180° intervals.

[0078] The avoidance portion 131F is formed in a concave shape, which is configured to avoid sliding with the second cam hill portion 143 when the bracket 130 is in the closed position P1 and the torque generating position P2. Therefore, the avoidance portion 131F has an angular range on the second circumference C2 corresponding to the angle between the closed position P1 and the torque generating position P2, and is formed in a fan shape.

[0079] The first fitting portion 131G1 is formed in the shape of a hole, which is configured to allow the second cam portion 143 to be inserted when the bracket 130 is in the opening and closing angle of the locking position P3, thereby fixing the bracket 130 at the opening and closing angle of the locking position P3.

[0080] The second fitting part 131G2 is formed in the shape of a hole, which is configured to allow the second cam mountain part 143 to be inserted when the bracket 130 is in the opening and closing angle of the locking position P4, thereby fixing the opening and closing angle of the bracket 130 at the opening and closing angle of the locking position P4.

[0081] The third fitting part 131G3 is formed in the shape of a hole, which is configured to allow the second cam mountain part 143 to be inserted when the bracket 130 is in the opening and closing angle of the locking position P5, thereby fixing the bracket 130 at the opening and closing angle of the locking position P5.

[0082] It should be noted that, in this embodiment, corresponding to the second cam mountain portion 143 having a generally rectangular shape, the first fitting portion 131G1, the second fitting portion 131G2, and the third fitting portion 131G3 are each formed as generally rectangular.

[0083] It should be noted that the first cam component 140A has a shape that is symmetrical to the second cam component 140B. That is to say, the second cam component 140B has two first cam ridges 142 and two second cam ridges 143 protruding toward the rotating part 131 on its surface 140Aa opposite to the rotating part 131.

[0084] Furthermore, the second sliding surface 131C of the rotating part 131, which is opposite to the first cam component 140A, has a shape that is symmetrical to the first sliding surface 131B. That is, the second sliding surface 131C is provided with a pair of suppressing parts 131D and a pair of avoiding parts 131E at 180° intervals on the first circumference C1, and a pair of avoiding parts 131F, a pair of first fitting parts 131G1, a pair of second fitting parts 131G2, and a pair of third fitting parts 131G3 at 180° intervals on the second circumference C2.

[0085] Therefore, in this embodiment, with the opening and closing of the bracket 130, each of the first cam members 140A and the second cam members 140B slides in the same manner relative to each of the two surfaces (first sliding surface 131B and second sliding surface 131C) of the rotating part 131.

[0086] (The operation of the opening and closing mechanism 100)

[0087] The following is for reference Figures 6-12 The operation of the opening and closing mechanism 100 according to one embodiment will be described. It should be noted that in the following description, since the first cam member 140A and the second cam member 140B operate simultaneously and in the same manner, the first cam member 140A and the second cam member 140B will be referred to together as "cam member 140".

[0088] <When the bracket 130 is in the closed position P1>

[0089] Figure 6 This is a diagram showing the positional relationship between the rotating part 131 of the bracket 130 and the cam portions 142 and 143 in the opening and closing mechanism 100 of one embodiment (when the opening and closing position of the bracket 130 is in the closed position P1).

[0090] like Figure 6 As shown, when the bracket 130 is in the closed position P1, the first cam bevel 142 abuts against the suppressing portion 131D formed in the rotating portion 131. Furthermore, the cam member 140 is in a state where it is being pushed away from the rotating portion 131 by the first cam bevel 142 while simultaneously compressing the disc spring 160 to retract it. Therefore, when the bracket 130 opens from the closed position P1 to the torque-generating position P2, the first cam bevel 142 slides on the suppressing portion 131D under the force exerted by the disc spring 160, thereby applying a load to the opening operation of the bracket 130. However, since the suppressing portion 131D is concave, the amount of compression of the disc spring 160 is relatively reduced; that is, the force exerted by the disc spring 160 is relatively reduced. Therefore, compared to when sliding occurs in the portion where the suppressing portion 131D is not formed, the load applied by the first cam bevel 142 is suppressed. Therefore, when the bracket 130 moves from the closed position P1 to the torque generation position P2, the first cam 142 slides on the suppression part 131D, applying a relatively small load to the opening action of the bracket 130.

[0091] On the other hand, such as Figure 6 As shown, when the bracket 130 is in the closed position P1, the second cam peak 143 is positioned opposite the avoidance portion 131F formed in the rotating portion 131. However, since the avoidance portion 131F is concave, the height of the second cam peak 143 is lower than the height of the first cam peak 142, and as described above, the cam member 140 is in a state of being pushed upward in the direction away from the rotating portion 131, so the second cam peak 143 does not abut against the avoidance portion 131F. Therefore, when the bracket 130 is opened from the closed position P1 to the torque generation position P2, the second cam peak 143 does not slide on the rotating portion 131.

[0092] <When the bracket 130 is in the torque generation position P2>

[0093] Figure 7 This is a diagram showing the positional relationship between the rotating part 131 of the bracket 130 and the cam portions 142 and 143 in the opening and closing mechanism 100 of one embodiment (when the opening and closing position of the bracket 130 is in the torque generation position P2).

[0094] like Figure 7 As shown, when the bracket 130 is opened to the torque generation position P2, the side wall portion 142A of the first cam hill portion 142 abuts against the inner wall surface 131Da of the circumferential end of the suppressing portion 131D (see the part enclosed by the circle in the figure). This temporarily stops the opening of the bracket 130. If the user applies an operating load from this state and the bracket 130 opens further, the first cam hill portion 142 crosses the step at the circumferential end of the suppressing portion 131D and crosses onto the sliding portion 131H between the suppressing portion 131D and the avoidance portion 131E. At this time, due to the rapid change in operating load, a locking sensation is felt for the user. Consequently, the cam member 140 further presses the disc spring 160, compressing it, and is pushed upwards further away from the rotating portion 131. That is, the cam member 140 is pushed upwards to its maximum extent in the direction away from the rotating portion 131. Therefore, when the bracket 130 moves from the torque generating position P2 to the locking position P3, the first cam hill 142 slides on the sliding portion 131H under the force exerted by the disc spring 160, thereby applying a load to the opening action of the bracket 130. At this time, since the sliding portion 131H is flat, the amount of compression of the disc spring 160 is maximized, that is, the force exerted by the disc spring 160 is maximized, and therefore the load applied by the first cam hill 142 is maximized. Therefore, when the bracket 130 moves from the torque generating position P2 to the locking position P3, the first cam hill 142 slides on the sliding portion 131H, applying the maximum load to the opening action of the bracket 130.

[0095] On the other hand, such as Figure 7 As shown, when the bracket 130 is opened to the torque generation position P2, the second cam hill 143 moves to a position opposite to the end portion 131Fa in the circumferential direction of the avoidance portion 131F. However, since the height of the second cam hill 143 is lower than the height of the first cam hill 142, and as described above, the cam member 140 is in a state of being pushed upward to its maximum extent in the direction away from the rotating portion 131, the second cam hill 143 does not abut against the end portion 131Fa in the circumferential direction of the avoidance portion 131F. Therefore, when the bracket 130 is opened from the torque generation position P2 to the locking position P3, the second cam hill 143 does not slide on the rotating portion 131.

[0096] <When the bracket 130 is in the locking position P3>

[0097] Figure 8 This is a diagram showing the positional relationship between the rotating part 131 of the bracket 130 and the cam portions 142 and 143 in the opening and closing mechanism 100 of one embodiment (when the opening and closing position of the bracket 130 is in the locking position P3).

[0098] like Figure 8 As shown, when the bracket 130 is opened to the locking position P3, the first cam bevel 142 falls into the notch-shaped avoidance portion 131E. This eliminates the upward push of the cam member 140 by the first cam bevel 142, causing the cam member 140 to move towards the rotating portion 131 under the force of the disc spring 160 and be pressed against the rotating portion 131. Simultaneously, the second cam bevel 143 engages with the first fitting portion 131G1. Thus, the bracket 130 is fixed at the opening / closing angle of the locking position P3. At this time, due to the drastic reduction in operating load, a locking operation feel is provided for the user.

[0099] If from Figure 8 In the indicated state, when the user applies an operating load and the bracket 130 opens, the second cam peak 143 crosses the step at the end of the first engagement portion 131G1 in the circumferential direction and crosses onto the sliding portion 131I between the first engagement portion 131G1 and the second engagement portion 131G2. At this time, due to the rapid change in operating load, a locking operation feels like it is being engaged by the user. As a result, the cam member 140 is pushed upwards away from the rotating portion 131 while pressing the disc spring 160 to retract it. Therefore, when the bracket 130 opens from the locking position P3 to the locking position P4, the second cam peak 143 slides on the sliding portion 131I under the force from the disc spring 160, thereby applying a load to the opening operation of the bracket 130. At this time, although the sliding portion 131I is flat, because the height of the second cam hill 143 is relatively low, the amount by which the disc spring 160 contracts under pressure becomes intermediate. That is, the force applied to the disc spring 160 becomes intermediate, and therefore the load applied by the second cam hill 143 becomes intermediate. Therefore, when the bracket 130 moves from the locking position P3 to the locking position P4, the second cam hill 143 slides on the sliding portion 131I, applying an intermediate load to the opening action of the bracket 130.

[0100] It should be noted that when the bracket 130 moves from the locking position P3 to the locking position P4, the first cam hill 142 remains inside the avoidance part 131E and therefore does not slide on the rotating part 131.

[0101] <When the bracket 130 is in the locking position P4>

[0102] Figure 9 This is a diagram showing the positional relationship between the rotating part 131 of the bracket 130 and the cam portions 142 and 143 in the opening and closing mechanism 100 of one embodiment (when the opening and closing position of the bracket 130 is in the locking position P4).

[0103] like Figure 9 As shown, when the bracket 130 is opened to the locking position P4, the second cam bevel 143 engages with the second fitting portion 131G2. Thus, the bracket 130 is fixed at the opening / closing angle of the locking position P4. Simultaneously, since the upward push of the cam member 140 by the second cam bevel 143 is eliminated, the cam member 140 is subjected to force from the disc spring 160 and moves towards the rotating portion 131, being pressed against it. At this time, due to the drastic reduction in operating load, a locking operation feel is provided for the user.

[0104] If from Figure 9 In the indicated state, when the user applies an operating load and the bracket 130 opens, the second cam peak 143 crosses the step at the end of the second engagement portion 131G2 in the circumferential direction and crosses onto the sliding portion 131J between the second engagement portion 131G2 and the third engagement portion 131G3. At this time, due to the rapid change in operating load, a locking operation feels like it is being engaged by the user. As a result, the cam member 140 is pushed upwards away from the rotating portion 131 while pressing the disc spring 160 to retract it. Therefore, when the bracket 130 opens from the locking position P4 to the locking position P5, the second cam peak 143 slides on the sliding portion 131J under the force from the disc spring 160, thereby applying a load to the opening operation of the bracket 130. At this time, although the sliding portion 131J is flat, the height of the second cam hill 143 is relatively low. Therefore, the amount by which the disc spring 160 is compressed and contracted is intermediate. That is, the force exerted on the disc spring 160 is intermediate, and thus the load applied by the second cam hill 143 is intermediate. Therefore, when the bracket 130 rotates from the locking position P4 to the locking position P5, the second cam hill 143 slides on the sliding portion 131J, applying an intermediate load to the opening action of the bracket 130.

[0105] It should be noted that when the bracket 130 rotates from the locking position P4 to the locking position P5, the first cam mountain 142 remains in the state of falling into the avoidance part 131E, so it does not slide on the rotating part 131.

[0106] <When the bracket 130 is in the locking position P5>

[0107] Figure 10 This is a diagram showing the positional relationship between the rotating part 131 of the bracket 130 and the cam portions 142 and 143 in the opening and closing mechanism 100 of one embodiment (when the opening and closing position of the bracket 130 is in the locking position P5).

[0108] like Figure 10As shown, when the bracket 130 is opened to the locking position P5, the second cam bevel 143 engages with the third fitting portion 131G3. Thus, the bracket 130 is fixed at the opening / closing angle of the locking position P5. Simultaneously, since the upward push of the cam member 140 by the second cam bevel 143 is eliminated, the cam member 140 is subjected to force from the disc spring 160 and moves towards the rotating portion 131, being pressed against it. At this time, due to the drastic reduction in operating load, a locking operation feel is provided for the user.

[0109] In addition, such as Figure 10 As shown, when the bracket 130 is opened to the locking position P5, the side wall portion 142A of the first cam mountain portion 142 abuts against the inner wall surface 131Ea of the end of the avoidance portion 131E in the circumferential direction (see the part surrounded by the circle in the figure).

[0110] <When the opening and closing position of bracket 130 is within the sliding torque range R1>

[0111] Figure 11 This is a diagram showing the positional relationship between the rotating part 131 of the bracket 130 and the cam portions 142 and 143 in the opening and closing mechanism 100 of one embodiment (when the opening and closing position of the bracket 130 is within the sliding torque range R1).

[0112] If from Figure 10 As shown, if the user applies an operating load and the bracket 130 opens, then... Figure 11 As shown, the first cam hill 142 crosses the step at the end of the circumferential direction of the avoidance part 131E and spans onto the sliding portion 131K (flat portion) between the avoidance part 131E and the restraint part 131D. At this time, due to the rapid change in operating load, a locking operation feeling is presented for the user. As a result, the cam member 140 is pushed upward to the maximum extent while pressing the disc spring 160 to its maximum extent and moving away from the rotating part 131 in the direction of departure. Therefore, when the bracket 130 opens from the locking position P5 to the opening position P6 within the sliding torque range R1, the first cam hill 142 slides on the sliding portion 131K under the maximum force from the disc spring 160, applying the maximum load to the opening operation of the bracket 130.

[0113] On the other hand, such as Figure 11As shown, when the bracket 130 is opened within the sliding torque range R1, the second cam hill 143 moves to a position opposite to the flat portion of the rotating part 131 (between the third engagement portion 131G3 and the avoidance portion 131F). However, since the height of the second cam hill 143 is lower than the height of the first cam hill 142, and as described above, the cam member 140 is in a state where it is pushed upward to the maximum extent in the direction away from the rotating part 131, the second cam hill 143 does not abut against the flat portion of the rotating part 131. Therefore, when the bracket 130 is opened within the sliding torque range R1, the second cam hill 143 does not slide on the rotating part 131.

[0114] <When the bracket 130 is in the open position P6 (opening / closing angle 180°)>

[0115] Figure 12 This is a diagram showing the positional relationship between the rotating part 131 of the bracket 130 and the cam portions 142 and 143 in the opening and closing mechanism 100 of one embodiment (when the opening and closing position of the bracket 130 is in the open position P6 (opening and closing angle 180°)).

[0116] like Figure 12 As shown, when the bracket 130 is opened to the open position P6, the first cam hill 142 falls into the suppression part 131D formed in the rotating part 131 (located with...). Figure 6 The suppression portion 131D is offset by 180° from the suppression portion 131D. Thus, the cam member 140 is in a state where it is pressed against the disc spring 160 to retract, while being pushed away from the rotating portion 131 by the first cam hill portion 142. Therefore, when the bracket 130 is in the open position P6, the first cam hill portion 142 is subjected to force from the disc spring 160 to press the suppression portion 131D, thereby applying a load to the opening action of the bracket 130. However, since the suppression portion 131D is concave, the amount of compression of the disc spring 160 is correspondingly reduced, that is, the force applied from the disc spring 160 is correspondingly reduced, and therefore the load applied by the first cam hill portion 142 is suppressed compared to when sliding on the flat portion where the suppression portion 131D is not formed. Therefore, when the bracket 130 is in the open position P6, the first cam 142 presses the suppression part 131D, applying a relatively small load to the opening action of the bracket 130.

[0117] On the other hand, such as Figure 12 As shown, when the bracket 130 is opened to the open position P6, the second cam mountain 143 is positioned relative to the avoidance portion 131F formed in the rotating portion 131 (at the same position as the avoidance portion 131F formed in the rotating portion 131). Figure 6The avoidance portion 131F is offset by 180° from the avoidance portion 131F. However, the avoidance portion 131F is formed in a concave shape, the height of the second cam hill portion 143 is lower than the height of the first cam hill portion 142, and as described above, the cam member 140 is in a state of being pushed upward in the direction away from the rotating portion 131. Therefore, when the bracket 130 is in the open position P6, the second cam hill portion 143 does not abut against the rotating portion 131.

[0118] (The sliding parts of the cam mountain section 142 and 143)

[0119] Figure 13 This is a diagram showing the sliding portion of the cam portion 142, 143 in the rotating portion 131 of the bracket 130 of an opening and closing mechanism 100 according to one embodiment.

[0120] like Figure 13 As shown, in the rotating part 131, the portion for the first cam mountain part 142 to slide is only the suppression part 131D, the sliding portion 131H between the suppression part 131D and the avoidance part 131E, and the sliding portion 131K between the avoidance part 131E and the suppression part 131D.

[0121] On the other hand, such as Figure 13 As shown, in the rotating part 131, the portion for the second cam mountain part 143 to slide is only the sliding portion 131I between the first fitting part 131G1 and the second fitting part 131G2, and the sliding portion 131J between the second fitting part 131G2 and the third fitting part 131G3.

[0122] That is to say, the first cam mountain part 142 slides on the rotating part 131 only when the bracket 130 moves from the closed position P1 to the locking position P3 and when the bracket 130 rotates from the locking position P5 to the open position P6.

[0123] On the other hand, the second cam mountain 143 slides on the rotating part 131 only when the bracket 130 moves from the locking position P3 to the locking position P5.

[0124] Thus, the opening and closing mechanism 100 in one embodiment has a first angular range (closed position P1 to locked position P3 and locked position P5 to open position P6) in which the first cam mountain 142 slides on the rotating part 131 and the second cam mountain 143 does not slide on the rotating part 131, and a second angular range (locked position P3 to locked position P5) in which the second cam mountain 143 slides on the rotating part 131 and the first cam mountain 142 does not slide on the rotating part 131.

[0125] Thus, the opening and closing mechanism 100 of one embodiment can distribute the sliding relative to the rotating part 131 to the first cam hill 142 and the second cam hill 143 according to the opening and closing angle of the bracket 130, thereby improving the wear resistance of the first cam hill 142 and the second cam hill 143 respectively.

[0126] In addition, according to one embodiment, the opening and closing mechanism 100 can distribute the locking that occurs along with the step across the rotating part 131 to the first cam hill 142 and the second cam hill 143 according to the opening and closing angle of the bracket 130, thereby improving the wear resistance of the first cam hill 142 and the second cam hill 143 respectively.

[0127] It should be noted that the closed position P1 to the locked position P3 and the locked position P5 to the open position P6 are also within the third angle range. When the higher cam hill (first cam hill 142) slides on the rotating part 131, the lower cam hill (second cam hill 143) does not slide on the rotating part 131. That is, in one embodiment, the opening / closing mechanism 100, by setting a height difference between the first cam hill 142 and the second cam hill 143, can easily create a range where the second cam hill 143 does not slide on the rotating part 131.

[0128] (Example)

[0129] Figure 14 It is a chart showing the results of previous durability tests on opening and closing mechanisms. Figure 15 This is a graph showing the results of a durability test of an opening / closing mechanism 100 according to one embodiment.

[0130] In this embodiment, the torque generated at each of the multiple locking positions and the torque change rate of the sliding torque with the increase of the number of tests were measured for both the conventional opening and closing mechanism and the opening and closing mechanism 100 of one embodiment.

[0131] It should be noted that the conventional opening and closing mechanism adopted the following structure: a pair of cam peaks are provided on one circumference of the cam component (equivalent to the second circumference), and a pair of first fitting parts, a pair of second fitting parts, and a pair of third fitting parts are provided on one circumference of the rotating part (equivalent to the second circumference).

[0132] like Figure 14 As shown, for the conventional opening and closing mechanism, the rate of torque change decreases significantly with the increase of the number of tests.

[0133] On the other hand, such as Figure 15 As shown, for the opening and closing mechanism 100 of one embodiment, the decrease in torque change rate with increasing number of tests was suppressed.

[0134] While the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to these embodiments. Various modifications or alterations can be made within the scope of the spirit of the present invention as set forth in the claims.

[0135] For example, although two first cam hills 142 are provided on the first circumference C1 in the embodiment, it is not limited to this, and one or more first cam hills 142 may also be provided on the first circumference C1.

[0136] In addition, for example, although two second cam peaks 143 are provided on the second circumference C2 in the embodiment, it is not limited to this, and one or more second cam peaks 143 may also be provided on the second circumference C2.

[0137] In addition, for example, although the cam hill is provided on two circumferences in the embodiment, the cam hill can also be provided on three or more circumferences.

[0138] Furthermore, for example, although in the embodiment a cam hill is provided on the cam member 140 and the cam hill slides on the rotating part 131 of the bracket 130, it is not limited to this. The cam hill can also be provided on the rotating part 131 of the bracket 130 and the cam hill slides on the cam member 140. That is to say, the components of the cam member 140 and the components of the rotating part 131 of the bracket 130 can be reversed.

[0139] In addition, for example, although the embodiment uses a structure in which two cam members 140A and 140B are used to clamp the rotating part 131 of the bracket 130, it is not limited to this and a structure in which only one cam member 140 is provided may also be used.

[0140] In addition, although the opening and closing mechanism 100 is used for opening and closing the display 12 in the embodiment, it is not limited to this and the opening and closing mechanism 100 can also be used for opening and closing other things besides the display 12.

[0141] In addition, for example, although three card slots are provided in the implementation, it is not limited to this. Two or fewer, or more than four card slots can be provided, or no card slots can be provided.

[0142] This application claims priority based on Japanese Patent Application No. 2021-203131, filed on December 15, 2021, the entire contents of which are incorporated herein by reference.

[0143] Symbol Explanation

[0144] 10 display devices

[0145] 12 monitors

[0146] 12A display surface

[0147] 20 top surface

[0148] 22-sided setting

[0149] 100 opening and closing mechanism

[0150] 110 bracket

[0151] 111 Horizontal wall section

[0152] 111A Through Hole

[0153] 112 Vertical wall

[0154] 112A Embedded Hole

[0155] 120 axis

[0156] 121 Embedded Section

[0157] 122 flange portion

[0158] 123 Embedded Section

[0159] 130 bracket (opening and closing components)

[0160] 131 Rotating Part

[0161] 131A opening

[0162] 131B First Sliding Surface

[0163] 131C Second Sliding Surface

[0164] 131D Suppression Section

[0165] 131Da inner wall surface

[0166] 131E Avoidance Department

[0167] 131Ea inner wall surface

[0168] 131F Avoidance Department

[0169] 131Fa end

[0170] 131G1 First Interlocking Part

[0171] 131G2 Second Mating Part

[0172] 131G3 Third Chip

[0173] 131H sliding section

[0174] 131I sliding part

[0175] 131J sliding section

[0176] 131K sliding section

[0177] 132 Maintenance Department

[0178] 132A Vertical Wall

[0179] 132B Horizontal Wall

[0180] 140 Cam Components

[0181] 140A First Cam Component

[0182] 140Aa surface

[0183] 140B Second Cam Component

[0184] 140Ba surface

[0185] 141 opening

[0186] 142 First Cam Mountain Section

[0187] 142A side wall portion

[0188] 143 Second Cam Mountain Section

[0189] 150 pressure plate

[0190] 151 Embedded Hole

[0191] 160 Disc Spring (Elastic Component)

[0192] 161 opening

[0193] C1 First Circumference

[0194] C2 Second Circumference

[0195] P1 Closed Position

[0196] P2 torque generation location

[0197] P3, P4, P5 card slot positions

[0198] P6 Open Location

[0199] R1 Slip Torque Range

[0200] AX Rotary Axis

Claims

1. An opening and closing mechanism, comprising: The opening and closing component has a rotating part on the rotating shaft; and A cam component, disposed on the rotating shaft opposite to the rotating portion of the opening / closing component, applies a load to the rotation of the rotating portion. One of the components, the cam component and the rotating part, has: At least one first cam hill is disposed on a first circumference centered on the rotation axis; and At least one second cam hill is disposed on a second circumference centered on the rotation axis, with a radius larger than that of the first circumference. The cam component and another component in the rotating part have: A sliding surface is used for sliding between the first cam hill and the second cam hill. The opening and closing mechanism has a first angle range and a second angle range. Within the first angle range, the first cam hill slides on the sliding surface while the second cam hill does not slide on the sliding surface. Within the second angle range, the second cam hill slides on the sliding surface while the first cam hill does not slide on the sliding surface. The other component has multiple hole-shaped or concave fitting portions. Within the first angle range or the second angle range, by engaging the first or second cam peak portion with the fitting portions, the opening and closing angle of the opening and closing component can be fixed in multiple stages. The first cam hill and the second cam hill are at different heights. The opening and closing mechanism has a third angle range, within which, when one of the higher cam peaks slides, the other lower cam peak does not slide. This ensures that, within the third angle range, if the user releases their hand at any opening or closing angle, the mechanism can maintain a stopped state at that angle due to the applied sliding resistance. The cam components are a pair of cam components arranged with their surfaces facing both sides of the rotating part, and the pair of cam components have mutually symmetrical shapes. The sliding surface of one of the first and second cam hills is only the sliding portion between multiple mating parts. When one cam hill is not sliding and the rotating part is rotating, as the rotating part rotates further, the one cam hill engages with the fitting part, and the one cam hill that engages with the fitting part rises to the sliding part, slides on the sliding part, and engages with the other fitting part. The sliding surface is disposed on each of the surfaces on both sides of the rotating part.

2. The opening and closing mechanism according to claim 1, wherein, The cam component has a first cam hill and a second cam hill. The rotating part has the sliding surface.

3. The opening and closing mechanism according to claim 1 or 2, wherein, The other component has a notch-shaped or concave avoidance portion in a portion of the first circumference to avoid sliding with the first cam mountain.

4. The opening and closing mechanism according to claim 1 or 2, wherein, The other component has a notch-shaped or concave avoidance portion in a portion of the second circumference to avoid sliding with the second cam mountain.

5. The opening and closing mechanism according to claim 1 or 2, wherein, The cam component is configured to move axially along the rotation axis.

6. The opening and closing mechanism according to claim 5, wherein, The opening and closing mechanism includes an elastic member disposed on the rotating shaft, which applies force to the cam member toward the rotating part of the opening and closing member.

7. The opening and closing mechanism according to claim 1 or 2, wherein, The opening and closing mechanism includes a pair of cam components having symmetrical shapes, which sandwich the rotating portion of the opening and closing components between them.

8. The opening and closing mechanism according to claim 1 or 2, wherein, The opening and closing component holds the display, thereby opening and closing together with the display.

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