JP5522793B2 - HINGE DEVICE AND ELECTRONIC DEVICE USING HINGE DEVICE - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a hinge device used for a pivoting portion of an electronic device such as a mobile phone or a notebook personal computer, and an electronic device using the hinge device.

  For example, a main unit provided with an operation unit is pivotally connected to a superposition unit provided with a display unit that is displayed by operation of the operation unit or a received signal, and the main unit is rotated by opening the superposition unit from the superposition blockage state. In an electronic device such as a mobile phone or a notebook personal computer that exposes and exposes the operation portion of the overlapping portion and the display portion on the lower surface of the overlapping portion, the hinge device used for this pivot connecting portion is, for example, one member. A bearing portion is provided in the connecting portion to be attached, a shaft portion is provided in the connecting portion attached to the other member pivotally attached thereto, and the shaft portion is connected to the bearing portion so that the shaft portion is pivotally supported.

  In this case, in order to realize a free stop that stops at the rotation position where the hand is released when the opening / closing rotation does not sway, for example, when the opening / closing rotation is performed by hand, the overlapping portion is not affected. There is a case where it is desired to configure so as to generate a large rotational frictional resistance (rotational torque) that counteracts its own weight.

  Not only a hinge device in such an electronic device, but also a damper that realizes a free stop, automatically rotates by its own weight slowly, and prevents a predetermined rotation torque from being generated. There is a similar request in other hinge devices such as when it is desired to function as a device.

  Therefore, for example, the bearing portion side is a fixed side and the shaft portion side is a relative rotation so that sufficient rotation torque is generated for the rotation of the bearing portion provided on one member side and the shaft portion provided on the other member side. If it explains as a moving side, it will rotate by providing a rotation friction part which rotates with a shaft part in a superposition state to a fixed part provided in a bearing part side, and a rotation friction part turning in a superposition state to a fixed part. It is configured to generate torque.

  In order to increase the rotational torque of the rotational friction portion that overlaps with the fixed portion, at least one of them is slidably provided, and this is superposed by a spring provided on the shaft portion or the bearing portion. A method of increasing the rotational torque by increasing the force is conceivable.

  However, although some increase can be expected, it is not only limited, but if this spring force is simply increased and only this spring force is applied, the spring will easily sag. It may end up inferior in durability.

  In addition, it is conceivable to take a method of increasing the rotational torque by applying irregularities or roughing to either or both surfaces of the fixed portion and the rotational friction portion that rotates relative to the fixed portion. However, there is still a limit to generating sufficient rotational torque while rotating, and as with the case of the spring described above, the surface may gradually become smoother as it is used. Inferior to sex.

  Further, as disclosed in Japanese Patent Application Laid-Open No. 2008-45677 proposed by the present applicant, a plurality of sets of a fixed plate serving as a bearing portion and a rotating friction plate provided on the shaft portion and rotated relative to the fixed plate in a superposed state are provided. There is also a structure in which the rotational torque is increased by increasing the total rotational friction between the fixed plate and the rotational friction plate by superposing them in a stacked state.

  As described above, it has a function as a damper device that realizes a free stop, automatically rotates slowly due to its own weight, or prevents a predetermined rotation from being generated. Various hinge devices have been proposed.

JP 2008-45677 A

  For example, the applicant has further researched and developed a hinge device having a function as a damper device in which a turning torque is generated when the main body portion and the overlapping portion are turned. We have developed an innovative hinge device that exhibits excellent operational effects and electronic equipment using the hinge device.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A hinge device that rotatably connects a first member 1 and a second member 2, wherein the first member 1 and the second friction member 3 provided on the first member 1 or the second member 2 are superposed in a pressure contact state. The second friction member 4 is provided on the second member 2 or the first member 1, and the first friction member 3 and the second friction member are rotated by rotating the first member 1 and the second member 2. 4 is configured so that a rotational frictional resistance is generated by relative rotation of the first and second friction members 3, and the sliding portion 7 on which the sliding convex portion 6 provided on the first friction member 3 or the second friction member 4 slides is provided. The second friction member 4 or the first friction member 3 is provided, and the sliding portion 7 is not located on the same circumference of the second friction member 4 or the first friction member 3 but at a distance from the rotation center. The first friction part is set to a shape having a plurality of sliding surfaces 7a and 7b formed at different positions. 3 and the second friction member 4, the sliding projection 6 slides according to the relative rotation position of the first friction member 3 and the second friction member 4. When the sliding surfaces 7a and 7b of the sliding part 7 are switched, the distance from the rotation center of the position where the sliding convex part 6 and the sliding part 7 abut is varied, and the first friction The present invention relates to a hinge device characterized in that the rotational frictional resistance is variable according to the relative rotational position of the member 3 and the second friction member 4.

  The sliding portion 7 has a plurality of sliding surfaces 7a and 7b arranged side by side in the rotational direction of the second friction member 4 or the first friction member 3, and this adjacent sliding surface. 2. The hinge device according to claim 1, wherein the surfaces 7a and 7b are arranged not at the same circumference but at different distances from the center of rotation.

  3. The hinge device according to claim 2, wherein each of the sliding surfaces 7a and 7b protrudes from the second friction member 4 or the first friction member 3.

  Moreover, the said sliding part 7 is comprised by the convex body which has length in the rotation direction of said 2nd friction member 4 or said 1st friction member 3, and this convex body is not on the same periphery. 2. The hinge device according to claim 1, wherein the hinge device has a plurality of sliding surfaces 7a and 7b formed at different positions from the rotation center.

  The sliding protrusions 6 are provided on the first friction member 3 or the second friction member 4 in a shape having a length in the radial direction from the center of rotation, or a plurality of the protrusions 6 are provided in parallel. It concerns on the hinge apparatus of any one of Claims 1-4.

  In addition, the first friction member 3 and the first member 1 in the one rotation range P1 from the overlapping position where the first member 1 and the second member 2 are superposed to the opening rotation position rotated in the opening direction. When the two friction members 4 rotate relative to each other, the distance from the rotation center P1 at the position where the sliding protrusion 6 and the sliding portion 7 come into contact with each other is from the one rotation range P1. When the first friction member 3 and the second friction member 4 are relatively rotated in another rotation range P2 up to the opening rotation position rotated in the opening direction, the sliding protrusion 6 and the object to be covered are moved. 6. The hinge device according to claim 1, wherein a distance L <b> 2 from a rotation center at a position where the sliding portion 7 abuts is set to be long.

  Further, the main body portion is the first member 1 or the second member 2, the overlapping portion that is superposed on the main body portion is the second member 2 or the first member 1, and the main body portion and the overlapping portion are the claims. It relates to an electronic apparatus using a hinge device characterized by being pivotally connected by the hinge device according to any one of Items 1 to 6.

  Since the present invention is configured as described above, the rotational frictional resistance (rotational torque) can be varied according to the relative rotational position of the first friction member and the second friction member. It is possible to adjust the necessary rotational torque, for example, when it is desired to obtain the torque, and as a configuration for varying the rotational torque, the sliding portion can be the second friction member or the first friction member. This is achieved by setting to a shape having a plurality of sliding surfaces formed at positions that are not on the same circumference but at different distances from the rotation center. Further, the rotational torque can be varied at the same time, and when the first friction member and the second friction member are rotated relative to each other, the sliding torque is changed according to the relative rotation position between the first friction member and the second friction member. When the sliding surface of the sliding part where the moving convex part slides changes, the sliding It is a structure that calculates the change in the rotation torque according to the rotation position from an unprecedented idea that the distance from the rotation center of the position where the convex portion and the slidable portion abut is variable. A revolutionary hinge device that is easy to manufacture and excellent in mass productivity, and an electronic device using the hinge device, with a configuration that can reliably achieve torque adjustment.

  In the inventions according to claims 2, 3, 4, and 5, a structure in which the rotational torque is varied according to the relative rotational position of the first friction member and the second friction member from a more specific configuration is further improved. It becomes an extremely excellent hinge device that can be easily realized.

  The invention according to claim 6 is a hinge device that is more practical and capable of more effectively utilizing the present invention that exhibits the above-mentioned functions and effects.

  According to a seventh aspect of the invention, an electronic device such as a mobile phone or a notebook personal computer using a hinge device that exhibits the above-described functions and effects is provided.

It is use condition explanatory drawing of a present Example. It is a perspective view which shows a present Example. It is a disassembled perspective view which shows a present Example. It is explanatory sectional drawing of the principal part which concerns on a present Example. It is explanatory sectional drawing of the principal part which concerns on a present Example. It is a perspective view which shows the principal part which concerns on a present Example. It is a perspective view which shows the principal part which concerns on a present Example. It is a schematic operation | movement explanatory drawing of the principal part which concerns on a present Example. It is operation | movement explanatory drawing of a present Example. It is a calculation formula which calculates | requires rotation friction resistance (rotation torque). It is the table | surface showing the change of the rotation friction resistance (rotation torque) according to the relative rotation position of a 1st friction member and a 2nd friction member.

  Embodiments of the present invention that are considered suitable (how to carry out the invention) will be briefly described with reference to the drawings, illustrating the operation of the present invention.

  When the first friction member 3 and the second friction member 4 are rotated relative to each other by rotating the first member 1 and the second member 2, the first friction member 3 and the second friction member that are superposed in this press-contact state. A rotational frictional resistance (rotational torque) is generated between the first and second members.

  Specifically, the sliding protrusion 6 provided on the first friction member 3 or the second friction member 4 slides on the sliding portion 7 provided on the second friction member 4 or the first friction member 3. Rotational frictional resistance (rotational torque) occurs.

  In the present invention, the sliding portion 7 is formed on the second friction member 4 or the first friction member 3 not on the same circumference but at different positions from the center of rotation. From this configuration, when the first friction member 3 and the second friction member 4 are rotated relative to each other, depending on the relative rotation position between the first friction member 3 and the second friction member 4. The sliding surfaces 7a and 7b of the sliding part 7 on which the sliding convex part 6 slides are switched, so that the position where the sliding convex part 6 and the sliding part 7 come into contact with each other from the rotation center. The distance is variable, and the rotational frictional resistance (rotational torque) is variable according to the relative rotational position of the first friction member 3 and the second friction member 4.

  That is, the rotational friction resistance (rotational torque) generated when the first friction member 3 and the second friction member 4 are relatively rotated in the pressure contact state is defined by the equation of FIG. Depending on the relative rotational position of the friction member 3 and the second friction member 4, the distance (sliding radius) from the rotational center of the position where the sliding convex portion 6 and the sliding portion 7 are in contact with each other is variable. Therefore, the rotational frictional resistance (rotational torque) varies according to the relative rotational position of the first friction member 3 and the second friction member 4.

  When this configuration is applied to a hinge device that rotatably connects the first member 1 and the second member 2, for example, the first member 1 and the second member 2 are rotated in the opening direction from the overlapping position where the first member 1 and the second member 2 overlap. In a scene where a strong rotational frictional resistance (rotational torque) is not required, the distance (sliding radius) from the rotational center of the position where the sliding convex portion 6 and the sliding portion 7 abut is short. On the other hand, in a scene where it is desired to obtain a strong rotational frictional resistance (rotational torque) to open the first member 1 and the second member 2 to realize a free stop, for example, the sliding convex portion The rotational frictional resistance (rotational torque) can be varied according to the product features, such as setting the distance (sliding radius) from the rotational center of the position where 6 and the slidable portion 7 are in contact with each other to be longer. Can be obtained.

  A specific embodiment of the present invention will be described with reference to the drawings.

  In this embodiment, for example, a main body 1 provided with an operation unit 11 (keyboard) of a notebook personal computer is used as the first member 1, and a superposition unit 2 provided with the display unit 12 on the lower surface is used as the second member 2. 1 is applied to a hinge device H that rotates and overlaps the overlapping portion 2 with respect to 1 so that it can be pivoted up and down from the overlapping position to the open position, and has a desired optimum rotational frictional resistance (rotational torque). The obtained hinge device H has a simple configuration and can be realized at low cost.

  In the present embodiment, the second member 2 or the first member 1 is provided with a second friction member 4 that is superposed and disposed in a pressure contact state with the first friction member 3 provided on the first member 1 or the second member 2. Thus, the first member 1 and the second member 2 are rotated, and the first friction member 3 and the second friction member 4 are rotated relative to each other so that a rotational friction resistance is generated.

  Specifically, in this embodiment, the bearing portion 3 (fixed plate portion) is provided in the first connecting portion 8 that is attached to the first member 1, and the shaft portion 10 that is pivotally supported by the bearing portion 3 is attached to the second member 2. The second connecting portion 9 is provided. In addition, both the 1st connection part 8 and the 2nd connection part 9 are metal, and the 2nd connection part 9 is comprised by a pair of bending-plate members 9A and 9A superposedly connected.

  In the present embodiment, the first connecting portion 8 (bearing portion 3) is the first friction member 3. The first friction member 3 may be formed of a member different from the first connecting portion 8 as another first friction member 3 described later.

  Further, a plurality of (a pair of) metal rotating friction plates 4 (second friction members 4) arranged in a superposed manner on the front and back surfaces of the bearing portion 3 are slidably provided on the shaft portion 10 in a non-rotating state, The second friction member 4 together with the shaft portion 10 is configured to rotate relative to the bearing portion 3 in a pressure contact state so that a rotational friction resistance (rotational torque) is generated.

  Further, the second friction member 4 is provided so as to be movable relative to the first friction member 3 in the separation direction against the urging force of the urging member 5 formed by laminating disc springs. The second friction member 4 is superposed on the friction member 3 in a pressure contact state.

  More specifically, the first friction member 3 is provided on the member provided with the bearing portion 3, that is, the first connection portion 8 in this embodiment, and the surface of the bearing portion 3 is provided on the first connection portion 8. There is provided a first friction member 3 made of a metal plate that sandwiches and superposes the second friction member 4 disposed in a superposed manner in a sandwich state.

  On the other hand, the second friction member 4 is provided on the shaft portion 10 so as to be non-rotatable and slidable in the axial direction. Specifically, a shaft portion 10 is projected from the second connecting portion 9, a non-rotating outer shape portion 10 a is provided with the outer shape of the shaft portion 10 as a square shape, and the non-rotating outer shape portion 10 a is in a non-rotating state. The said 2nd friction member 4 is set to the shape which has the rotation prevention hole 4a of the square hole which penetrates.

  In the present embodiment, two second friction members 4 that are superposed on the front and back of the first friction member 3 of the first connecting portion 8 are provided, and the second friction members 4 have the same plate shape.

  In the present embodiment, a distal end washer 13 is provided as a distal end support portion 13 at the distal end portion of the shaft portion 10, and a proximal end bearing portion 10b is also provided at the proximal end portion. The distal end support portion 13 and the bearing portion 3 (one The second friction member 4 slidable with respect to the shaft portion 10 between the first friction member 3) and the base end support portion 10b and the bearing portion 3 (one first friction member 3). In addition, another first friction member 3 is disposed between the tip support portion 13 and the bearing portion 3 (one first friction member 3), all of which are the same as the second dynamic friction member 4. A plurality of disc springs 5A inserted in parallel through the shaft portion 10 are provided as the urging body 5, and the laminated first friction member 3 and second friction member 4 are all brought together at the base end bearing portion 10b and the bearing. It is configured so as to press the portion 3 and bias the polymerization.

  Further, in this embodiment, the second friction member 4 or the first friction member 3 is provided with a sliding portion 7 on which the sliding protrusion 6 provided on the first friction member 3 or the second friction member 4 slides. The sliding portion 7 has a shape having a plurality of sliding surfaces 7a and 7b formed at positions where the distances from the rotation center are different, not on the same circumference of the second friction member 4 or the first friction member 3. When the relative friction between the first friction member 3 and the second friction member 4 is set, the sliding projection 6 is slid according to the relative rotation position between the first friction member 3 and the second friction member 4. When the sliding surfaces 7a and 7b of the moving sliding portion 7 are switched, the distance from the rotation center of the position where the sliding convex portion 6 and the sliding portion 7 are in contact with each other is variable, and the first friction member The rotational frictional resistance is made variable according to the relative rotational position between 3 and the second friction member 4.

  Specifically, the sliding portion 7 has a plurality of sliding surfaces 7a and 7b arranged in parallel in the rotation direction of the second friction member 4, and the adjacent sliding surfaces 7a and 7b are adjacent to each other. They are not located on the same circumference but at different distances from the center of rotation.

  A plurality (a pair) of sliding surfaces 7a are provided at opposing positions on the surface of the second friction member 4 with the holes 4a interposed therebetween, and the sliding surfaces 7b are provided on the surface of the second friction member 4 with holes. A plurality (a pair) are provided at opposite positions with 4a interposed therebetween, and the distance from the rotation center of the second friction member 4 is longer on the sliding surface 7b than on the sliding surface 7a. Is set to

  Further, each of the sliding surfaces 7a and 7b protrudes from the second friction member 4, and the sliding convex portion 6 and the sliding portion 7 are polymerized in a butt pressure contact state between the convex portions. .

  The sliding portion 7 is composed of one convex body having a length in the rotational direction of the second friction member 4 or the first friction member 3, and this convex body does not rotate on the same circumference. It is good also as a shape which has several sliding surface 7a, 7b formed in the position where the distance from a moving center differs. That is, the illustrated sliding surfaces 7a and 7b may have a continuous shape.

  On the other hand, a plurality (a pair) of sliding projections 6 are provided at opposing positions on the surface of the first friction member 3 with the holes 3a interposed therebetween. It is provided in a shape having a length in the radial direction from the center.

  Note that a plurality of sliding protrusions 6 may be arranged side by side.

  In this embodiment, the first member 1 (main body portion) and the second member 2 (overlapping portion) have a single rotation range P1 from the overlapping position where the first member 1 (main body portion) overlaps to the open rotation position rotated in the opening direction. When the first friction member 3 and the second friction member 4 are rotated relative to each other, the rotation speed is one time as compared with the distance L1 from the rotation center at the position where the sliding convex portion 6 and the sliding portion 7 are in contact with each other. When the first friction member 3 and the second friction member 4 are relatively rotated in the other rotation range P2 from the movement range P1 to the opening rotation position rotated in the opening direction, the sliding protrusion 6 and the covered portion The distance L2 from the rotation center at the position where the sliding portion 7 abuts is set to be long.

  The one rotation range P1 described above means that, for example, the cam portion provided on the first member 1 (first connecting portion 8) and the cam engaging portion provided on the second member 2 (second connecting portion 9) are uneven. When engaged, it is a range in which a rotation biasing force (suction force) for closing and biasing the first member 1 and the second member 2 is generated, and the other rotation range P2 is, for example, from the cam engagement portion. The cam part is engaged and disengaged, and the first member 1 and the second member 2 are in an open state, and a free stop state in which the state is maintained even if the hand is released is obtained.

  As shown in FIG. 9, the hinge device H according to the present embodiment configured as described above rotates the first member 1 and the second member 2 so that the first friction member 3 and the second friction member 4 are relative to each other. When it is turned, a turning frictional resistance (turning torque) is generated between the first friction member 3 and the second friction member 4 that are superposed in this pressure contact state.

  Specifically, the pair of sliding projections 6 provided on the first friction member 3 slides on the sliding parts 7 (sliding surfaces 7 a and 7 b) provided on the second friction member 4. A rotational frictional resistance (rotational torque) is generated.

  The sliding portion 7 is set to have a shape having a plurality of sliding surfaces 7a and 7b formed at different positions from the rotation center, not on the same circumference of the second friction member 4. Specifically, each of the sliding surfaces 7 a and 7 b is a top surface of a ridge protruding from the sliding portion forming surface of the second friction member 4, and the distance from the rotation center of the second friction member 4. The sliding surface 7a with a short L1 is formed in a linear shape in front view, and the sliding surface 7b in which the distance L2 from the rotation center of the second friction member 4 is long is formed in an arc shape. Yes.

  From this configuration, as shown in FIG. 8, when the first friction member 3 and the second friction member 4 are relatively rotated, according to the relative rotation position of the first friction member 3 and the second friction member 4, When the sliding surfaces 7a and 7b of the sliding part 7 on which the sliding convex part 6 slides are switched, the distance from the rotation center of the position where the sliding convex part 6 and the sliding part 7 abut is changed. The rotation friction resistance (rotation torque) varies according to the relative rotation position between the first friction member 3 and the second friction member 4. Further, FIG. 11 is a theoretical curve by analysis showing a change in rotational frictional resistance (rotational torque) due to switching from the sliding surface 7a to the sliding surface 7b.

  That is, the rotational friction resistance (rotation torque) generated when the first friction member 3 and the second friction member 4 are relatively rotated in the pressure contact state is defined by the equation of FIG. Depending on the relative rotational position of the first friction member 3 and the second friction member 4, the distance (sliding radius) from the rotational center of the position where the sliding convex portion 6 and the sliding portion 7 are in contact with each other is Therefore, the rotational frictional resistance (rotational torque) varies depending on the relative rotational position between the first friction member 3 and the second friction member 4. In addition, the sliding radius said by this specification is represented by the distance from the rotation center of the position which contact | abuts when a member rotates relative to a member in a press-contact state.

  When this configuration is applied to a hinge device that rotatably connects the first member 1 and the second member 2, for example, the first member 1 and the second member 2 are rotated in the opening direction from the overlapping position where the first member 1 and the second member 2 overlap. In a scene where a strong rotational frictional resistance (rotational torque) is not required to be moved (a scene where a suction force that biases the first member 1 and the second member 2 in the closing direction is generated), The distance (sliding radius) from the center of rotation at the position where the sliding portion 7 abuts is set to be short, and on the other hand, for example, the first member 1 and the second member 2 are opened to provide strong rotational friction resistance. A scene where (rotation torque) is to be obtained (a scene in which a free stop state is realized in which the first member 1 and the second member 2 are not opened and closed even if they are released when the first member 1 and the second member 2 are opened at a predetermined angle. ) During rotation of the position where the sliding convex part 6 and the sliding part 7 come into contact with each other Such as the distance (sliding radius) is set to be longer from the can rotates frictional resistance corresponding to the characteristics of the product (rotational torque) may vary.

  Further, the rotational torque may be further increased by roughening the surfaces of the sliding surfaces 7a and 7b.

  Note that the present invention is not limited to the embodiments, and the specific configuration of each component can be designed as appropriate.

DESCRIPTION OF SYMBOLS 1 1st member 2 2nd member 3 1st friction member 4 2nd friction member 6 Sliding convex part 7 Sliding part 7a Sliding surface 7b Sliding surface

Claims (7)

  A hinge device for rotatably connecting a first member and a second member, wherein the second friction member is arranged in a pressure contact state with the first friction member provided on the first member or the second member. Is provided on the second member or the first member, and the first friction member is rotated relative to the second friction member by rotating the first member and the second member. A sliding portion on which the sliding convex portion provided on the first friction member or the second friction member slides is provided on the second friction member or the first friction member, The moving portion is set to a shape having a plurality of sliding surfaces formed at positions where the distance from the rotation center is different from the second friction member or the first friction member but not on the same circumference. In the relative rotation between the first friction member and the second friction member, the first friction According to the relative rotation position of the material and the second friction member, the sliding surface of the sliding portion on which the sliding convex portion slides is switched, whereby the sliding convex portion and the sliding surface are switched. The distance from the rotation center of the position in contact with the moving portion is variable, and the rotation friction resistance is variable according to the relative rotation position of the first friction member and the second friction member. A hinge device characterized.   The sliding portion has a plurality of sliding surfaces arranged in parallel in the rotational direction of the second friction member or the first friction member, and the adjacent sliding surfaces are on the same circumference. 2. The hinge device according to claim 1, wherein the hinge device is arranged at a position where the distance from the rotation center is different.   The hinge device according to claim 2, wherein each of the sliding surfaces protrudes from the second friction member or the first friction member.   The sliding portion is configured by a convex body having a length in the rotational direction of the second friction member or the first friction member, and the convex body is not on the same circumference but from the rotational center. 2. The hinge device according to claim 1, wherein the hinge device has a shape having a plurality of sliding surfaces formed at different positions.   2. The sliding convex portion is provided on the first friction member or the second friction member in a shape having a length in a radial direction from the rotation center, or a plurality of the sliding convex portions are arranged in parallel. The hinge apparatus of any one of -4.   The first friction member and the second friction member are relative to each other in one rotation range from a polymerization closing position where the first member and the second member are superposed to an opening rotation position rotated in the opening direction. An open rotation position that is rotated in the opening direction from the one rotation range as compared to the distance from the rotation center of the position where the sliding convex portion and the sliding portion abut when rotating. When the first friction member and the second friction member rotate relative to each other in the other rotation range up to the distance from the rotation center of the position where the sliding convex portion and the sliding portion contact each other The hinge device according to claim 1, wherein the hinge device is set to be long.   The main body portion is the first member or the second member, the overlapping portion that is superposed on the main body portion is the second member or the first member, and the main body portion and the overlapping portion are any of the first to sixth aspects. An electronic device using the hinge device, wherein the electronic device is pivotally connected by the hinge device according to claim 1.

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