JP6561390B2 - Biaxial hinge - Google Patents

Description

  The present invention relates to a biaxial hinge that connects a movable part to a body part so as to be rotatable in two directions.

  Conventionally, in a small electronic device such as a video camera, a display for an operator to visually recognize an image is attached as a movable part to a main body part so as to be rotatable in two directions via a biaxial hinge. What is known. In such an electronic device, a configuration is known in which the movable portion is rotated about an axis parallel to the main body, and the movable portion is rotated about an axis orthogonal to the main body (for example, a patent). Reference 1).

JP 2012-159095 A

  According to the biaxial hinge described in the above-mentioned patent document, the click part when rotating the movable part about the axis orthogonal to the main body part is relatively unrotatable with the support member and the hinge shaft. It is configured using two members, a click plate which cannot be rotated. However, according to the above-described conventional document, since the number of components for configuring the click portion increases, the manufacturing cost of the biaxial hinge increases and the weight of the biaxial hinge increases.

  The present invention has been made in view of the above situation, and the problem to be solved by the present invention is to reduce the manufacturing cost and reduce the weight by reducing the number of components for constituting the click part. To provide a biaxial hinge that can be reduced in weight.

  Hereinafter, means for solving the above problems will be described.

That is, in claim 1, a support member comprising a plate-like first support frame and a plate-like second support frame disposed at a position facing the first support frame, and a plate-like member A rotating frame, and a first bent portion and a second bent portion in which both ends of the rotating frame are bent in the same direction, and a first shaft is attached to the first bent portion and the first support frame. The second shaft is inserted through the second bent portion and the second support frame, thereby rotating around a first rotation axis orthogonal to the first support frame and the second support frame. And a third shaft formed to protrude from the mounting portion toward the first rotation shaft, and the third shaft. Is inserted through the rotating frame A biaxial hinge comprising a mounting member supported rotatably about a second rotating shaft orthogonal to the mounting portion, the third between the rotating frame and the mounting portion Around the shaft, a disc spring cam that urges the rotating frame and the mounting portion in a direction away from each other is inserted so as not to rotate relative to the mounting member. A cam groove is formed on the surface of the disc spring, and the cam groove can be fitted with a cam portion of the disc spring cam. When the mounting member rotates, the disc spring cam rotates, and the disc spring cam A rotation resistance is generated in the attachment member due to a frictional force generated between the cam portion and the cam groove by an urging force, and the rotation of the first shaft on the side of the second support frame is performed. At different positions in the rotation direction of the member, Disposed one magnet and the second magnet, respectively, are fixed to the first base portion is one end side is connected to the first support frame, a first magnetic sensor mounting member is the other end positioned in the vicinity of the first shaft A first magnetic sensor for detecting the magnetism of the first magnet or the second magnet is disposed on the other end side of the first magnetic sensor mounting member. By detecting the magnetism of the first magnet when facing the first magnet when the member rotates, and by detecting the magnetism of the second magnet when facing the second magnet, The state of the rotation angle of the rotation member can be detected.

  That is, according to a second aspect of the present invention, a third magnet is disposed at a position separated from the third shaft by a predetermined distance from the third shaft toward the first bent portion or the second bent portion. A second magnetic sensor mounting member is formed at a location separated from the third shaft by a distance equal to the distance between the third shaft and the third magnet, and the second magnetic sensor mounting member includes the third magnetic sensor mounting member; A second magnetic sensor for detecting the magnetism of the magnet is provided, and the second magnetic sensor detects the magnetism of the third magnet when facing the third magnet when the mounting member is rotated. Moreover, the state of the rotation angle of the mounting member can be detected by not detecting the magnetism of the third magnet when it is not opposed to the third magnet.

  That is, according to a third aspect of the present invention, a cam member is disposed on the second shaft on the first support frame side of the second support frame, and the cam member includes the first cam portion made of resin and the cam member. A resin-made second cam portion that can be fitted to the first cam portion is biased by a spring in a direction approaching each other, and the first cam portion is disposed so as not to rotate relative to the second support frame. The two cam portions are disposed so as not to rotate relative to the second bent portion.

  The present invention has an effect that the manufacturing cost of the biaxial hinge can be reduced and the weight can be reduced by reducing the number of components for configuring the click portion of the biaxial hinge.

The perspective view which shows one Embodiment of the biaxial hinge which concerns on this invention. The top view which similarly shows a biaxial hinge. The front view which similarly shows a biaxial hinge. The right view which similarly shows a biaxial hinge. (A) And (b) is the back perspective view which showed the relationship between a rotation frame and a disc spring cam, respectively. (A) And (b) is each XX sectional drawing in FIG. 3 of the state which rotated the rotation member to the opposite position. The top view which shows the biaxial hinge of the state which rotated the attachment member. (A) And (b) is sectional drawing of the state which rotated the rotation member to the opposite position in the biaxial hinge which concerns on another embodiment, respectively.

  First, the biaxial hinge 10 which concerns on one Embodiment of this invention is demonstrated. In the present embodiment, the direction of the biaxial hinge 10 is defined by the arrows shown in the drawings.

  The biaxial hinge 10 according to the present embodiment is a member for attaching a movable part such as a display so as to be rotatable in two directions with respect to a main body part in a small electronic device such as a video camera, and is mainly made of aluminum or steel. It is formed of a metal such as As will be described later, the biaxial hinge 10 is a sensor hinge that can detect the posture of the movable portion with respect to the main body. However, it is also possible to configure as a normal biaxial hinge without providing each magnet and sensor.

  As shown in FIGS. 1 to 4, the biaxial hinge 10 mainly includes a support member 12 (12L / 12R), a cam member 13, a rotating member 14, a mounting member 15, a sensor mounting member 16 (16a / 16b), and the like. As a component. As will be described later, the biaxial hinge 10 is provided so that the rotating member 14 can rotate about the first rotating axis L1 with respect to the support member 12 (see the arrow R1 in FIG. 1), and the mounting member 15 is arranged so as to be rotatable around the second rotation axis L2 with respect to the rotation member 14 (see arrow R2 in FIG. 1). The support member 12 is disposed in the main body (not shown), and the movable member (not shown) is attached to the attachment member 15, so that the movable portion can be moved in two directions with respect to the main body (in the direction parallel to the main body) And about an axis perpendicular to the parallel axis). In this embodiment, as shown in FIG. 1 to FIG. 4 and FIG. 6A, the movable part is in a closed state with respect to the main body part when the rotating member 14 is located rearward. As shown in b), it is assumed that the movable part is in an open state with respect to the main body part in a state where the rotating member 14 is located forward.

  The support member 12 includes a first support member 12L and a second support member 12R. In the present embodiment, the first support member 12L and the second support member 12R are disposed at positions facing each other on the left and right.

  The first support member 12L includes a plate-like first base portion 21L attached to the main body portion, and a plate-like first support frame 22L erected upward from the right end portion of the first base portion 21L. . The first base portion 21L has two holes 21a for inserting a fixing tool such as a screw when attached to the main body portion. In the first support frame 22L, an insertion hole (not shown) for inserting a first shaft 31 described later is opened through in the thickness direction.

  The second support member 12R is bilaterally symmetric with the first support member 12L and has substantially the same configuration. That is, the second support member 12R includes a plate-like second base portion 21R attached to the main body portion, a plate-like second support frame 22R erected upward from the left end portion of the second base portion 21R, Is provided. That is, the second support frame 22R is disposed at a position facing the first support frame 22L. The second base portion 21R has a plurality of holes 21a into which fixing tools such as screws are inserted when attaching to the main body portion. An insertion hole (not shown) for inserting a later-described second shaft 35 is opened through the second support frame 22R in the thickness direction. In addition, a regulation protrusion for regulating the rotation of the rotation member 14 is formed at the lower part of the left side surface of the second support frame 22R.

  In the present embodiment, the support member 12 is composed of two members, the first support member 12L and the second support member 12R. However, the first support frame 22L and the second support frame are formed from one base portion. It is also possible to configure as one member in which 22R is erected.

  The first support frame 22L and the second support frame 22R of the support member 12 have an axis line (first rotation axis L1) directed in the left-right direction so as to be orthogonal to the first support frame 22L and the second support frame 22R. The rotating member 14 is supported so as to be rotatable.

  The rotating member 14 includes a rectangular plate-shaped rotating frame 41 disposed in the left-right direction with the longitudinal direction thereof, a first bent portion 42L in which both ends of the rotating frame 41 are bent in the same direction, and a second bent portion. Part 42R. An insertion hole (not shown) for inserting the first shaft 31 or the second shaft 35 is opened through the first bent portion 42L and the second bent portion 42R in the thickness direction.

  The left end portion of the first shaft 31 is inserted through the first bent portion 42L and the first support frame 22L, and the right end portion of the second shaft 35 is inserted through the second bent portion 42R and the second support frame 22R. Thus, the rotation member 14 is supported so as to be rotatable about the first rotation axis L1. In the initial state, the rotating member 14 is disposed at a position facing backward as shown in FIGS. At this time, the movable portion is closed with respect to the main body portion.

  In the present embodiment, a communication hole 31 a is formed in the first shaft 31 in the axial direction. That is, the first shaft 31 is formed in a hollow cylindrical shape. Further, on the second support frame 22R side (right part) of the first shaft 31, magnet installation recesses 31b and 31c are formed at positions facing each other about 180 degrees across the first shaft 31 (FIG. 6). (See (a) and (b)). A flat plate-shaped first opening / closing detection magnet 63a and second opening / closing detection magnet 63b are disposed in the magnet installation recesses 31b and 31c, respectively. The first opening / closing detection magnet 63a and the second opening / closing detection magnet 63b are arranged so that different poles face outward. For example, the first opening / closing detection magnet 63a is arranged so that the outside is the N pole, and the second opening / closing detection magnet 63b is arranged so that the outside is the S pole.

  Further, the insertion hole of the first bent portion 42 </ b> L is formed in a non-circular shape that is substantially the same shape as the outer peripheral shape of the shaft portion of the first shaft 31. That is, the first bent portion 42L and the first shaft 31 are coupled so as not to be relatively rotatable, and the first shaft 31 is similarly rotated when the rotating member 14 is rotated. Yes. A washer 34 is disposed by caulking on the left side of the first support frame 22L. A washer 32 is inserted between the first shaft 31 and the first bent portion 42L, and a washer 33 is inserted between the first bent portion 42L and the first support frame 22L.

  The insertion hole of the second support frame 22 </ b> R is formed in a non-circular shape that is substantially the same shape as the outer peripheral shape of the shaft portion of the second shaft 35. That is, the second support frame 22R and the second shaft 35 are connected so as not to be relatively rotatable, and the second shaft 35 is configured not to rotate even when the rotating member 14 rotates.

  An angle regulating washer 39 is interposed between the second bent portion 42R and the second support frame 22R. The angle restricting washer 39 is connected to the second bent portion 42R so as not to be relatively rotatable. That is, when the rotation member 14 rotates, the angle regulating washer 39 rotates together with the rotation member 14. The angle restricting washer 39 has a large diameter portion, and the large diameter portion abuts on a restricting projection formed on the second support frame 22R, whereby the angle restricting washer 39 and the rotation member 14 are rotated. The angle is regulated (see FIGS. 6A and 6B). In the present embodiment, as shown in FIGS. 6A and 6B, the rotation member 14 rotates in a rotation range of about 180 degrees from the rear to the front.

  The cam member 13 is disposed on the second shaft 35 between the left end portion of the second shaft 35 and the second bent portion 42R, that is, on the first support frame 22L side of the second support frame 22R.

  The cam member 13 is constituted by a resin first cam portion 37 and a resin second cam portion 38 that can be fitted to the first cam portion 37 being biased by a spring 36 in a direction close to each other. The The cam surface of the first cam portion 37 and the cam surface of the second cam portion 38 are configured to be fitted to each other. The second cam portion 38 is disposed so as not to rotate relative to the second bent portion 42R. The first cam portion 37 is connected to the second shaft 35 so as not to be relatively rotatable.

  By configuring as described above, when the rotating member 14 is rotated, the second cam portion 38 is similarly rotated. At this time, since the first cam portion 37 does not rotate, the rotating member 14 is caused by a frictional force generated between the cam surface of the first cam portion 37 and the cam surface of the second cam portion 38 by the biasing force of the spring 36. Rotation resistance occurs in In the present embodiment, as shown in FIGS. 6A and 6B, when the rotation member 14 is positioned rearward (when the rotation angle is 0 degree) and when it is positioned forward (rotation). When the angle is 180 degrees), the cam surfaces are engaged with each other. That is, the rotation member 14 is configured so that the position is stable when the rotation angle is 0 degree or 180 degrees. In each drawing in the present specification, the first cam portion 37 and the second cam portion 38 are shown in a slightly separated state so that the two cam surfaces can be easily seen.

  The attachment member 15 includes a plate-like attachment portion 51 and a third shaft 52 formed to protrude from the attachment portion 51 toward the first rotation axis L1. In both front and rear directions of the third shaft 52, a shaft portion having a flat portion formed on the outer peripheral side surface is formed. An insertion hole for inserting the rear shaft portion of the third shaft 52 is opened at a substantially central portion of the attachment portion 51. The insertion hole of the attachment portion 51 is formed in substantially the same shape as the outer peripheral shape of the shaft portion of the third shaft 52. That is, the attachment portion 51 and the third shaft 52 are coupled so as not to be relatively rotatable, and when the attachment member 15 is rotated, the third shaft 52 is similarly rotated. In the present embodiment, a communication hole 52 a is formed in the third shaft 52 in the axial direction. That is, the third shaft 52 is formed in a hollow cylindrical shape.

  Then, the shaft portion on the front side of the third shaft 52 is inserted into the rotation frame 41, so that it rotates around the axis line (second rotation axis L <b> 2) oriented in the front-rear direction so as to be orthogonal to the attachment portion 51. The attachment member 15 is supported so as to be movable.

  In addition, a regulating member 53 is disposed by caulking at the tip of the third shaft 52 on the first rotation axis L1 side (front side in FIGS. 1 and 2). The restricting member 53 has an insertion hole through which the shaft portion on the front side of the third shaft 52 is inserted. The insertion hole of the restricting member 53 is formed in substantially the same shape as the outer peripheral shape of the shaft portion of the third shaft 52. That is, the restricting member 53 and the third shaft 52 are connected so as not to be relatively rotatable, and when the third shaft 52 is rotated, the restricting member 53 is similarly rotated. That is, the regulating member 53 rotates in conjunction with the rotation of the attachment portion 51.

  Around the third shaft 52 between the rotating frame 41 and the mounting portion 51, a resin disc spring cam 54 that biases the rotating frame 41 and the mounting portion 51 in a direction in which they are separated from each other is interposed. The disc spring cam 54 has an insertion hole (not shown) through which the front shaft portion of the third shaft 52 is inserted. The insertion hole of the disc spring cam 54 is formed in a non-circular shape that is substantially the same shape as the outer peripheral shape of the shaft portion of the third shaft 52. That is, the disc spring cam 54 is disposed so as not to rotate relative to the third shaft 52, and when the mounting member 15 rotates, the disc spring cam 54 also rotates. A washer 55 is interposed between the disc spring cam 54 and the mounting portion 51.

  As shown in FIGS. 2 and 5A, a cam groove 41 a is formed on the rear surface (the surface on the mounting portion 51 side) of the rotating frame 41. 2 and 5B, the cam groove 41a can be fitted with the cam portion of the disc spring cam 54. As shown in FIG. In this embodiment, since the disc spring cam 54 rotates when the mounting member 15 rotates, the mounting member 15 is caused by a frictional force generated between the cam portion and the cam groove 41a by the biasing force of the disc spring cam 54. Rotation resistance occurs in In this embodiment, as shown in FIGS. 2 and 7, when the longitudinal direction of the mounting member 15 is the left-right direction (when the rotation angle is 0 degree and 180), the cam portion and cam groove of the disc spring cam 54 are used. It is comprised so that 41a may bite. That is, the attachment member 15 is configured so that the position is stabilized when the rotation angle is 0 degree or 180 degrees. In other words, according to the biaxial hinge 10 according to the present embodiment, the cam groove 41a of the rotating frame 41 and the disc spring cam 54 constitute a click portion when the mounting member 15 rotates. It is. In the present embodiment, as shown in FIGS. 1 to 4, when the rotation angle of the mounting member 15 is 0 degree so that the rotation detection magnetic sensor 64 is located on the left side, the movable portion is placed on the main body portion. On the other hand, it shall be in a normal state. Further, as shown in FIG. 6, when the rotation angle of the mounting member 15 is 180 degrees so that the rotation detection magnetic sensor 64 is located on the right side, the movable part is in an inverted state with respect to the main body part. And

  A cylindrical fixing pin 56 is inserted through the front side of the rotating frame 41. Then, the rotation of the mounting member 15 around the second rotation axis L <b> 2 is restricted by the fixing pin 56. Specifically, the regulating member 53 has a large-diameter portion, and the rotation angle of the regulating member 53 and the attachment member 15 is regulated when the large-diameter portion abuts on the fixing pin 56.

  The attachment member 15 restricted by the restriction member 53 and the fixing pin 56 has been rotated 180 degrees clockwise from the state in which the longitudinal direction is the left-right direction as shown in FIG. 3 (the state in which the rotation angle is 0 degrees). It is rotated in a rotation range of about 270 degrees until the state and the state rotated 90 degrees counterclockwise (the state in which the longitudinal direction is the vertical direction).

  As shown in FIGS. 2 and 7, a rotation detection magnet 65 having a short columnar shape is disposed at a position separated from the third shaft 52 on the right side by a predetermined distance on the rotation frame 41.

  The sensor attachment member 16 includes an open / close detection magnetic sensor attachment member 16a and a rotation detection magnetic sensor attachment member 16b. The opening / closing detection magnetic sensor mounting member 16a is configured by disposing an opening / closing detection sensor support portion 61 having a plane parallel to the first rotation axis L1 in the vicinity of the first shaft 31. The open / close detection sensor support portion 61 is a plate-like member bent in a crank shape, and one end side (left end side) thereof is fixed to the first base portion 21L via a fixing pin 21b. On the other end side (right end side) of the opening / closing detection sensor support 61, an opening / closing detection magnetic sensor 62 for detecting the magnetism of the first opening / closing detection magnet 63a or the second opening / closing detection magnet 63b is disposed. The open / close detection magnetic sensor 62 is fixed by being clamped by fixing claws 61 a and 61 a erected on the other end of the open / close detection sensor support 61.

  The rotation detection magnetic sensor attachment member 16 b is formed at a location separated from the third shaft 52 in the attachment portion 51 to the left by the same distance as the distance between the third shaft 52 and the rotation detection magnet 65. The rotation detection magnetic sensor mounting member 16b is provided with a rotation detection magnetic sensor 64 that detects the magnetism of the rotation detection magnet 65.

  Each of the open / close detection magnetic sensor 62 and the rotation detection magnetic sensor 64 includes a substrate, a hall element, a connector, and the like. The substrate is a plate-like member having a rectangular shape in plan view. The Hall element is an embodiment of the magnetic sensor according to the present invention, and outputs an electric signal corresponding to (a strength of) a magnetic field acting on itself. Instead of the Hall element used in this embodiment, a magnetic reaction element such as an MR element can be used as the magnetic sensor. The connector connects an external device or the like to the hall element by a wire harness or the like (not shown).

  According to the biaxial hinge 10 according to the present embodiment, it is possible to detect the posture of the movable part with respect to the main body by being configured as described above. Specifically, as shown in FIG. 6A, when the rotation member 14 (the rotation frame 41) is located rearward, the magnetic force of the first open / close detection magnet 63a opposed to the open / close detection magnetic sensor 62 is obtained. By detecting this, it is possible to detect that the movable part is in a closed state with respect to the main body part. Further, as shown in FIG. 6B, when the rotation member 14 (the rotation frame 41) is located in front, the magnetism of the second opening / closing detection magnet 63b opposed to the opening / closing detection magnetic sensor 62 is detected. By doing so, it is possible to detect that the movable part is open with respect to the main body part. Since the first open / close detection magnet 63a and the second open / close detection magnet 63b are arranged so that different poles face outward, the open / close detection magnetic sensor 62 can detect and detect the magnetism of the two magnets.

  Further, as shown in FIG. 7, when the mounting plate 51 of the mounting member 15 is positioned so that the rotation detection magnetic sensor 64 is arranged on the right side, the rotation detection magnet facing the rotation detection magnetic sensor 64 is opposed. By detecting 65 magnetism, it is possible to detect that the movable part is in an inverted state with respect to the main body part. 1 to 4, when the mounting plate 51 of the mounting member 15 is positioned so that the rotation detection magnetic sensor 64 is disposed on the left side (not disposed on the right side), it rotates. Since the detection magnetic sensor 64 does not detect the magnetism of the rotation detection magnet 65, it is possible to detect that the movable portion is not reversed with respect to the main body portion. As a result, when the biaxial hinge 10 is used in a video camera or the like, the screen displayed on the display of the movable unit can be inverted upside down when the movable unit is inverted with respect to the main body. Become.

  As described above, according to the biaxial hinge 10 according to the present embodiment, the click portion when the mounting member 15 rotates is configured by the cam groove 41a of the rotating frame 41 and the disc spring cam 54. . That is, the click portion is configured only by disposing the disc spring cam 54 on the third shaft 52 so as not to be relatively rotatable between the attachment portion 51 and the third shaft 52. That is, according to the biaxial hinge 10 according to the present embodiment, the number of parts for forming the click part when the movable part is rotated around the axis orthogonal to the main body part is reduced as compared with the prior art. Can be made. For this reason, the manufacturing cost of the biaxial hinge 10 can be suppressed, and the weight of the biaxial hinge 10 can be reduced.

  Moreover, according to the biaxial hinge 10 which concerns on this embodiment, the 1st shaft 31 and the 3rd shaft 52 are formed in the hollow cylinder shape by forming the communicating holes 31a * 52a in the axial direction. . Thereby, from the movable part attached to the attachment member 15 to the main body part on which the support member 12 is disposed, the movable part such as the display, the open / close detection magnetic sensor 62, and the rotation detection magnetism via the communication holes 31a and 52a. It is possible to pass the wire harness from the sensor 64. Note that the first shaft 31 and the third shaft 52 can also have a solid shape.

  In the biaxial hinge 10 according to the present embodiment, the cam member 13 is disposed on the second shaft 35 on the first support frame 22L side of the second support frame 22R, and the cam member 13 is made of resin. The first cam portion 37 and the first cam portion 37 and the resin-made second cam portion 38 that can be fitted to each other are biased by a spring 36 in a direction approaching each other, and the first cam portion 37 is connected to the second shaft 35. The second cam portion 38 is disposed so as not to be rotatable relative to the second bent portion 42R. In this way, the first cam portion 37 and the second cam portion 38 are made of resin, thereby reducing the weight and cost of the biaxial hinge 10. Further, the biaxial hinge 10 is made compact by disposing the cam member 13 on the left side of the second support frame 22R (between the first support frame 22L and the second support frame 22R).

  Next, the biaxial hinge 110 which concerns on another embodiment is demonstrated using Fig.8 (a) and (b). Since the biaxial hinge 110 according to the present embodiment has substantially the same configuration as the biaxial hinge 10 according to the above-described embodiment, different parts will be mainly described.

  In the present embodiment, magnet installation recesses 131b and 131c are formed on the right portion of the first shaft 131 at positions facing each other across the first shaft 131 (see FIGS. 6A and 6B). ). In the magnet installation recesses 131b and 131c, columnar first opening / closing detection magnets 163a and second opening / closing detection magnets 163b are arranged at phases different by about 150 degrees. The first opening / closing detection magnet 163a and the second opening / closing detection magnet 163b are arranged such that different poles face outward. For example, the first opening / closing detection magnet 163a is arranged so that the outside is the N pole, and the second opening / closing detection magnet 163b is arranged so that the outside is the S pole.

  According to the biaxial hinge 110 according to the present embodiment, it is possible to detect the posture of the movable part with respect to the main body by being configured as described above. Specifically, as shown in FIG. 8A, when the rotating member 14 (the rotating frame 41) is located rearward, the magnetic force of the first opening / closing detection magnet 163a opposed to the opening / closing detection magnetic sensor 62. By detecting this, it is possible to detect that the movable part is in a closed state with respect to the main body part. Further, as shown in FIG. 6B, when the rotation member 14 (the rotation frame 41) is positioned forward, the magnetism of the second opening / closing detection magnet 163b opposed to the opening / closing detection magnetic sensor 62 is detected. By doing so, it is possible to detect that the movable part is open with respect to the main body part. Since the first opening / closing detection magnet 163a and the second opening / closing detection magnet 163b are arranged such that different poles face outward, the opening / closing detection magnetic sensor 62 can detect and detect the magnetism of the two magnets.

10 Biaxial hinge 31 First shaft 41 Rotating frame 51 Mounting portion 51a Cam groove 52 Third shaft 54 Belleville spring cam

Claims (3)

A support member comprising: a plate-like first support frame; and a plate-like second support frame disposed at a position facing the first support frame;
A plate-like rotary frame; and a first bent portion and a second bent portion in which both ends of the rotary frame are bent in the same direction, and a first shaft is provided with the first bent portion and the first bent portion. The second shaft is inserted into the support frame, and the second shaft is inserted into the second bent portion and the second support frame, so that the first rotation axis perpendicular to the first support frame and the second support frame is the center. A rotating member supported rotatably on
A plate-like attachment portion; and a third shaft formed to project from the attachment portion toward the first turning shaft, and the third shaft is inserted into the turning frame. A mounting shaft supported rotatably about a second rotation axis orthogonal to the mounting portion, and a biaxial hinge comprising:
Around the third shaft between the rotating frame and the mounting portion, a disc spring cam that urges the rotating frame and the mounting portion in a direction separating them from each other rotates relative to the mounting member. Interspersed impossible,
A cam groove is formed on the surface of the rotating frame on the mounting portion side, and the cam groove can be fitted with the cam portion of the disc spring cam.
When the mounting member rotates, the disc spring cam rotates, and the mounting member has a rotational resistance due to a frictional force generated between the cam portion and the cam groove by the biasing force of the disc spring cam. That occurs,
On the side of the second support frame in the first shaft, a first magnet and a second magnet are respectively arranged at different positions in the rotation direction of the rotation member,
One end side is fixed to a first base portion connected to the first support frame, and the other end side includes a first magnetic sensor mounting member located in the vicinity of the first shaft,
A first magnetic sensor for detecting the magnetism of the first magnet or the second magnet is disposed on the other end side of the first magnetic sensor mounting member,
The first magnetic sensor detects the magnetism of the first magnet when facing the first magnet when the pivoting member is rotated, and the first magnetic sensor when facing the second magnet. By detecting the magnetism of the two magnets, it is possible to detect the state of the rotation angle of the rotation member.
A biaxial hinge characterized by that. In the rotating frame, a third magnet is disposed at a location separated from the third shaft by a predetermined distance from the first bent portion side or the second bent portion side,
A second magnetic sensor attachment member is formed at a location separated from the third shaft in the attachment portion by the same distance as the distance between the third shaft and the third magnet,
The second magnetic sensor mounting member is provided with a second magnetic sensor for detecting the magnetism of the third magnet,
When the mounting member rotates, the second magnetic sensor detects the magnetism of the third magnet when facing the third magnet, and when the mounting member is not facing the third magnet, By not detecting the magnetism of the third magnet, it is possible to detect the state of the rotation angle of the mounting member.
The biaxial hinge according to claim 1, wherein: On the side of the first support frame in the second support frame, a cam member is disposed on the second shaft,
The cam member is biased by a spring in a direction in which a resin first cam portion and a resin second cam portion that can be fitted to the first cam portion are close to each other,
The first cam portion is disposed so as not to rotate relative to the second support frame, and the second cam portion is disposed so as not to rotate relative to the second bent portion.
The biaxial hinge according to claim 1 or 2, wherein

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