JP2002155923A - Biaxial hinge having plurality of torque generating parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biaxial hinge component capable of providing durability, miniaturization, and lightening in a mobile hone or a notebook model personal compute requiring miniaturization and lightening. SOLUTION: In this biaxial hinge having an opening and closing shaft 1 and a rotary shaft 7, rotating cams 5 for the opening and closing shaft are provided on the opening and closing shaft 1, the rotating cams are pressed against a fixed cam 4 for the opening and closing shaft from both sides by coil springs 3 to apply change to friction torque, and a rotating cam 11 and a fixed cam 10 for the rotary shaft are pressed against the rotary shaft 7 by a spring 9 to apply change to friction torque. Several modified examples in structure and combination of the plurality of torque generating parts are available.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biaxial hinge part used for a folding part of a small electronic device such as a mobile phone, a notebook computer, an electronic organizer, a DVD monitor and the like.

[0002]

2. Description of the Related Art In most cases, a friction torque generating mechanism for an open / close shaft and a rotary shaft of a conventional two-shaft hinge has a plate material wound around a shaft or a structure in which a plate spring is pressed to generate a rotational friction torque. is there.

FIGS. 9A and 9B show an example of a conventional biaxial hinge. (A) is a plate spring 55 wound around both ends of the opening / closing shaft 1 and a flat portion for mounting equipment is installed. (B) shows a structure in which a leaf spring 56 and a bracket 19 processed in a wavy shape at both ends of the opening and closing shaft 1 are fixed to the shaft by the fixing flange 2. The rotating shaft 7 is provided so as to penetrate the center of the opening / closing shaft 1, and the rotational friction torque is
Is caused by the method of pressing the contact.

A conventional product having a structure in which a leaf spring 55 is wound around an opening / closing shaft or a frictional torque is generated by pressing a corrugated leaf spring 56 is used.
5 is apt to be loosened due to deformation (sagging) and abrasion damage of the press-contact parts of the corrugated spring 56, so that there remains a problem in durability, so that the friction torque is greatly reduced during use, and the monitor and the like of the device are opened and closed in a predetermined manner. Phenomena such as not stopping at the position and wobbling appear remarkably with time. In addition, there is a disadvantage that the operability and feeling are naturally deteriorated as compared with the initial one due to the reduction of the generated torque. In addition, the components (a) and (b) generally use high-grade materials to prevent sagging and abrasion, and are costly because heat treatment materials are used. Further, if the dimensional accuracy of the components is poor, the characteristics may vary. This is disadvantageous in that the torque value is unstable and adjustment is required, and a failure is likely to occur. Recent hinge parts emphasize operability and feeling during opening / closing / rotation compared to conventional characteristics, high-precision torque value management and durability, especially for hundreds of thousands of times, Cost reduction has been strongly demanded.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a portable telephone or a notebook personal computer that requires smaller size and lighter weight, and is capable of achieving durability, smaller size and lighter weight. It is to provide hinge parts.

[0006]

Means for Solving the Problems The invention described in claim 1 is:
An open / close shaft having a square cross section, and a flange installed at the end of the open / close shaft for connecting to the skeleton at both ends, and an open / close shaft inserted through the open / close shaft to change friction torque on both surfaces. Give concave,
A rotating cam for an opening / closing shaft having a convex and a flat surface and having a hole on the outer periphery for fixing the rotating shaft; and a sliding torque capable of sliding with the opening / closing shaft and rotating integrally with the shaft. Two fixed cams for the opening and closing shaft, which are in contact with both surfaces of the rotating cam for the opening and closing shaft having a concave, convex, and flat surface and a flat surface on the other surface, and a flange installed at an end of the opening and closing shaft; Two coil springs for biasing a repulsive force between the rotary shaft and the fixed cam;
A rotating shaft having a square cross section, one end of which is fitted and fixed to the rotating cam for the opening / closing shaft, and a stopper plate on the other end, and the rotating shaft at substantially both ends of the rotating shaft. Two rotating shaft rotary cams, which have a concave, convex, and flat surface on one side and have a flat surface on the other side to change the friction torque, and connect the outer periphery thereof to another frame; Two pieces which are slidable with the rotating shaft and rotate integrally with the rotating shaft, and which come into contact with the rotating shaft rotating cam having a concave, convex, and flat surface having a change in friction torque on one surface and a flat surface on the other surface. A rotating shaft fixed cam and a single coil spring for urging a repulsive force between the two rotating shaft fixed cams.
Since the fixed cam is arranged coaxially with each of the opening / closing shaft and the rotating shaft so as to abut, a high sliding torque can be obtained by a weak repulsive force of the coil spring.

According to a second aspect of the present invention, there is provided an opening / closing shaft for inserting an opening / closing shaft fixing bracket for connecting a frame to both ends having a square cross section, and slidable with the opening / closing shaft and integrated with the shaft. Concave, which changes the friction torque on one side,
Two fixed cams for an open / close shaft having a convex surface and a flat surface, and another surface having a flat surface; one coil spring for urging a repulsive force between the two fixed cams for the open / close shaft; Two rotating cams for an opening / closing shaft having concave, convex, and flat surfaces which play with the shaft and change the friction torque on one side, and which come into contact with the rotating cams for the opening / closing shaft, and the two rotating cams for the opening / closing shaft Connecting the through hole of the rotating shaft and the concave that gives a change in friction torque to the rotating shaft,
It is made of a rotating shaft mounting bracket having a convex and a flat surface on both surfaces, and a leaf spring having a plurality of each of a plurality of convex portions which are fitted under the rotating shaft and rotated integrally with each other under the rotating shaft mounting bracket. A rotating shaft for integrally rotating the rotating shaft fixed cam, an E-ring and a rotating shaft flange for urging a repulsive force to the rotating shaft spring, and a bracket for connecting to another frame. A hinge, which rotates on two sides and is coaxially arranged on the rotating shaft and the open / close shaft so that the fixed cams come into contact with each other. Therefore, the number of parts for the rotating shaft can be reduced, and the rotating shaft can be shortened.

According to a third aspect of the present invention, an opening / closing shaft fixing bracket for connecting to a frame is inserted into both ends having a square cross section, and one end has a hole through the rotation shaft,
And an opening / closing shaft having concave, convex, and flat surfaces on the upper and lower sides of the shaft for changing the rotating torque of the rotating shaft, and slidable with the opening / closing shaft and rotating integrally with the shaft. Two fixed cams for the open / close shaft having a concave, convex, and flat surface and a flat surface on the other surface; one coil spring for biasing a repulsive force between the two fixed cams for the open / close shaft; A rotating shaft penetrating the opening / closing shaft, two fixed cams for the rotating shaft located above and below the opening / closing shaft, slidable with the rotating shaft and rotating integrally with the shaft; A plurality of rotating shaft springs for biasing the rotating shaft fixed cam from above and below, a stop plate and a rotating shaft flange for biasing the rotating shaft spring to the repelling force, and another frame Rotation on two sides consisting of a bracket for connection with the rotating shaft, so that the fixed cam comes into contact with the rotating shaft and the opening / closing shaft Flexibility is improved attachment to precursor from the rotation axis from one end of the switching shaft by disposing coaxially Le is a structure to be loosely fitted.

According to a fourth aspect of the present invention, there is provided two or more contact portions having a combination of the configuration of the open / close shaft according to any one of the first to third aspects, and two contact portions having a combination of the configuration of the rotary shaft. With the above-mentioned contact portion, a high sliding torque can be obtained by a weak repulsive force of the coil spring with respect to a set rotational torque value required for the rotating shaft and the opening / closing shaft,
As for the rotating shaft, the number of parts is reduced and the rotating shaft can be shortened.

According to a fifth aspect of the present invention, the opening / closing angle regulation of the opening / closing shaft is integrally attached to a part of the rotating cam for the opening / closing shaft or a part of the fixed cam for the opening / closing shaft. The rotation of the rotating shaft and the opening / closing shaft can be stopped at a set angle by being integrally attached to the rotating cam or a part of the fixed cam for the rotating shaft.

According to a sixth aspect of the present invention, a part of the rotary shaft is formed into a cross section having a major axis and a minor axis, and the width of the opening is adjusted by the rotation while contacting the cross section according to the opening / closing angle of the opening / closing axis. Either a rotation restricting control plate having a width that inhibits rotation of the shaft and a width that allows rotation of the rotation shaft, or the rotation restricting groove or the rotation restricting plate is provided on a part of the body side. , The rotation of the rotating shaft can be made possible only within the set angle range of the opening and closing shaft.

[0012] The invention according to claim 7 is characterized in that the cross section of each shaft of the portion that slides with the fixed cam is a shaft processed into a cross section other than a circle. A function can be added because an arbitrary cross-sectional shape can be obtained in a portion other than the sliding portion.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an example of the biaxial hinge of the present invention. The hinge of the opening / closing shaft has a square cross section and an opening / closing shaft 1 having holes for fixing pins 6 at both ends, a flange 2 having a pin hole, a coil spring 3 having a polished seat surface, and two convex portions on one surface and a flat other surface. A fixed cam for opening and closing shaft 5 having a square through hole which can be fitted and slidable with opening / closing shaft 1 at the center, and a round rotatable through opening / closing shaft 1 having two concave portions on both sides and having center at the center. Hole 4 for fixing the rotating shaft 7 to the outer peripheral portion.
1 is a component of the rotary cam 4 for the opening and closing shaft having the number 1.

The hinge of the rotating shaft has a projection 7-1 and a flange for fixing the hole 4-1 of the rotating cam 4 for the opening and closing shaft at an end thereof and a flange. 8. A rotary shaft rotary cam 10 having a press-contact surface having two concave portions on one side, a flat surface on the other surface, and a rotatable hole at the center through which the rotary shaft 7 passes, and a concave portion of the rotary cam 10 on one surface. A rotating shaft fixed cam 11 having a square through hole in which the rotating shaft 7 is fitted and slidable in the center with the pressing surface having the abutting convex portion and the other surface being flat and the center thereof, a polished coil spring 9 for the bearing surface, It comprises a stopper plate 12 for fixing the assembly to the shaft 7 by caulking or the like.

For the assembling of the rotating cam 4 for the opening and closing shaft and the rotating shaft 7, screwing, welding, bonding or the like can be used in addition to the method of press-fitting the projection 7-1 into the hole 4-1 as shown in the figure.

In this example, the rotating and fixed cams for the opening / closing shaft 1 and the rotating shaft 7 have been described as having a concave portion and a convex portion in a part of the contact surface. It is also possible to employ a configuration in which the irregular shape is extended over the circumference. The recess may be a hole or a groove.

The cross-sectional shape of the opening / closing / rotating shafts (1, 7) can be any shape other than a circle. In this example, the case where the fixing cams 5, 11 are square is shown over the entire length. , 7 can be slid, but a shaft machined so as to have a part that cannot rotate is also usable.

FIG. 2 is an assembly of the components of FIG.
It is an assembly drawing showing an embodiment of the invention. First open / close shaft 1
The hinge configuration of (1) is such that an open / close shaft rotating cam 4, which has a contact surface for generating torque on both sides, on a closed shaft 1 having a square cross section, and a fixed cam 5, one of which is a contact surface, are pressed against the rotary cam. And two more
After assembling each of the polished coil springs 3 and assembling them, the fixing pins 6 are inserted from both sides of the shaft while compressing the coil springs by the flanges 2 to form an open / close shaft hinge having two sets of torque generating portions. assemble. The hinge structure of the rotating shaft 7 is such that the rotating shaft 7 having a flange, a rectangular cross section, and a flange and a fixing protrusion 7-1 at an end is press-fitted into a fixing hole 4-1 of the opening and closing shaft rotating cam 4; After being fixed by welding, the bracket 8, the rotating cam 10, the fixed cam 11, the coil spring 9,
Finally, the stopper plate 12 is formed as a rotary shaft hinge having two sets of torque generating portions while caulking while compressing a spring so as to abut the torque generating surface of the rotating / fixed cam. The bracket 8 of the rotating shaft and the rotating cam 10 may be fixed so as to move integrally, or may be a common component. In the figure, a rotating shaft case 14, a bracket 8, and two rotating cams 10 are coupled to each other to transmit a rotational friction torque to the outside. The case 14 may be replaced with a case formed separately from a housing of a device to which a hinge is attached.

FIG. 3 shows an open / close shaft hinge having the open / close shaft 1 in common with the open / close shaft 1 shown in FIG. It is a structure. At both ends of the opening / closing shaft 1, there are holes 18 for attaching and fixing a hinge to a device. The three rotating cams 4 are connected by an opening / closing shaft case 13.
The rotating shaft 7 fixed to the opening / closing shaft rotating cam 4 has the same structure as the opening / closing shaft hinge shown in FIG.
The bracket 8 is installed so as to be connected to the rotary shaft rotary cam 10.

In FIG. 3, a rotation stopper mechanism for limiting the range of the rotation angle between the opening and closing shaft 1 and the rotating shaft 7 is also provided.
The opening / closing shaft is a rotation stopping protrusion 20 of the opening / closing shaft and a flange 21 for stopping the rotation of the opening / closing shaft. The rotating shaft is a rotation stopping flange 22 of the rotation shaft and a rotation stopping protrusion 2 of the rotation shaft.
Perform in step 3. The stop projection 23 of the rotating shaft may be provided on the bracket 8. As shown in FIG. 3, in the present invention, it is possible to realize two or more sets of friction torque generating parts by abutment of the rotating / fixed cam, with the opening and closing shaft 1 and the rotating shaft 7 being common.

FIG. 4 shows an opening / closing shaft hinge penetrating the opening / closing shaft 1 having a square cross section, and comprising a fixed cam 5, a rotating cam 4, a bracket 19 for fixing the opening / closing shaft, and a flange 2 on both sides of the coil spring 3. A rotating shaft mounting bracket 16 that is installed in combination with the two rotating cams 5 is mounted. The rotating shaft mounting bracket 16 has a hole that penetrates the rotating shaft 7 whose cross section is a D-cut surface, a contact surface, and a through hole 10-1 through which a click mechanism is provided. use. The hinge of the rotary shaft has a leaf spring 9-1 having a D-cut hole at the center on both sides of the coupling bracket 16 and capable of sliding with respect to the shaft 7, but having a convex portion which rotates integrally, and a flange 17 and an E-ring. Leaf spring 9 at 15
-1 is fixed in a compressed state, and a bracket 8 is provided at the shaft end. As shown in the figure, the present invention realizes two sets of friction torque generating sections by using the rotating / fixed cams in common with the opening / closing shaft 1 and the rotating shaft 7 in common.

The sectional shape of the opening / closing / rotating shaft is fixed cam 5,
It is sufficient that the moving range is a shape other than a circle when the 10, 10-1 are slidable with the shaft and rotate integrally. For example, a cylinder is processed into a cross section other than a circle only in the moving range, and a hole shape of the fixed cam is formed. It may be a combined one.

FIG. 4 shows a rotation regulating mechanism performed by a rotation regulating control plate 24 and a rotation regulating shaft 25 provided on the opening and closing shaft. At the end of the rotating shaft 7 having a D-cut cross section, there is a parallelogram or elliptical shaft 25 having a long and short shaft cross section. A mechanism in which the rotation range of the rotation shaft 7 is restricted between the short shaft portion 25 and the short shaft portion 25 is shown.

FIG. 5 shows an opening / closing shaft 1 having a square cross section, which has substantially the same structure as the hinge of the opening / closing shaft shown in FIG. 4 and has two sets of torque generating portions provided on both sides of a coil spring by rotating and fixed cams. The rotation shaft 7 is further provided with a rotation shaft hinge at the other end of the opening / closing shaft 1. The rotating shaft hinge has a convex portion and a flat plate, and is rotatable with a rotating cam portion 10 provided as a common member on both surfaces of the opening / closing shaft 1 and a rotating shaft 7 provided through the opening / closing shaft 1. The corrugated spring 9 and the rotating spacer 28 are inserted and assembled with the fixed flange 2 by contacting the concave portion of the fixed cam 11 which rotates integrally. FIG. 5 shows a bracket 19 for fixing the opening / closing shaft, a bracket 8 for the rotating shaft, components 20 and 21 for the opening / closing axis stop mechanism, and a component 2 for the rotating shaft stop.
2 and 23 can be attached. FIG.
As described above, according to the present invention, two sets of friction torque generating sections are realized by abutment of the rotating / fixed cams, with the opening and closing shaft 1 and the rotating shaft 7 being commonly used.

FIG. 6 shows an example of the rotation restricting mechanism of the rotary shaft according to the present invention. FIG. 6A shows an opening / closing shaft hinge constituted by one rotating cam 4, two fixed cams 5 and a coil spring 3 on the opening / closing shaft 1, and further fitted to the opening / closing shaft 1 in the same manner as the fixed cam 5. Two rotation regulating control plates 24 which are slidable but rotate integrally with the shaft 1 are provided. The figure shows that the rotation restricting shaft portion 25 of the rotary shaft 7 is square and short.
1. The gap between the regulation control plates 24 shows the state of the narrow band 24-1. FIG. 6B is a side view of FIG. 6A, and shows a case in which the rotary shaft 10 is installed with the rotary shaft 7 penetrating right beside the rotary cam 4 for the open / close shaft.

The rotation regulating control plate 24 is installed in a ring shape, and the rotation regulating shaft portion 25-2 of the rotating shaft has a long and wide width. FIG. 6C shows the shape of the rotation control plate 24. The left and right plates 24-2 and 24-3 face each other with a taper, and a narrow band 24-1 is provided at an upper portion and a wide band 24-4 is provided at a lower portion. To be installed. Regarding the rotation regulating shaft portion 25 of the rotating shaft, the short shaft 25-1 can pass only when the plate 24 is the narrow band 24-1, and in the case of the long shaft 25-2, the passage of the 24-1 is restricted. Is shown. In the wide width 24-4, a state is shown in which the shaft can pass or rotate in either the short length 25-1 or the wide width 25-2 and the rotation is not restricted. The figure shows that when the rotating shaft 25 moves from the wide width 24-4 to the narrow band 24-1, it contacts the walls of 24-2 and 24-3 and gradually moves, and the direction of the shaft is 25-2. Indicates that the rotation restricting force is applied to 25-1 and the rotation is made 90 degrees. FIG.
(D) shows a state in which (b) is rotated by 360 degrees every 90 degrees. Rotation shaft 51 at the same position as in FIG.
Changes the position to 52, 53, 50 every 90 degrees, so that the rotation restricting plate 2 as shown in FIG.
By installing 4, the rotation of the rotating shaft 7 can be restricted at a specific position. Also, the rotation restricting plate 24 is effective even if it is installed only in a portion where the rotation must be restricted.

As a method of controlling the rotation, it is also possible to install a control plate 24 at the end of the rotating shaft 7 as shown in FIG.

FIG. 7 shows the rotation restricting plate 24 and the rotation restricting shaft 2.
5 is an example showing the relationship of FIG.
The rotation control plate 24 that enables the rotation of the shaft 7 only at a specific position is shown.

FIG. 8 shows an example in which, unlike the case where the rotation is restricted by the component attached to the hinge alone, the case where the hinge is installed on the housing side of the device to which the hinge is attached is also possible. FIG.
8A is an example in which the rotation of the rotation restricting shaft 25 is restricted by a gap between two externally mounted rotation restricting plates (plate-like) 31. FIG. 25 and a gap 24 between the externally mounted rotation regulating plate (groove) 32
-1 is controlled to control the rotation.

[0030]

As described above, since the required rotational friction torque is divided and generated by the plurality of torque generating sections, the load on one set of generating sections can be reduced. Therefore, the stability and durability of the torque value are reduced as compared with the conventional one, and the load per set is reduced, so that the characteristic adjustment is simplified, and the rotating cam and the fixed cam are hardly abraded, and if the strength is strong, the characteristics are stable and the life is long. A simple biaxial hinge can be provided.

Biaxial hinges used in electronic devices differ considerably in the range of rotational friction torque values required for their purposes. A two-axis hinge having a plurality of torque generating portions can be provided by combining the contents of claims 1, 2, and 3 with respect to this request. Is also possible.

According to the present invention, the rotation and fixing cam is provided with a drop (click) engagement function for ensuring the fixing of the cover at the storage and use positions required for the monitor cover, which is required for a cellular phone or the like. This is achieved by pressing several convex and concave portions. Therefore, the falling engagement start position and the strength can be determined by a combination of the height and the angle (θ) of the unevenness of the rotation and the fixed cam.

[Brief description of the drawings]

FIG. 1 is an exploded view of an embodiment according to claim 1 of the present invention.

FIG. 2 is a front view of the first embodiment of the present invention.

FIG. 3 is a front view of an embodiment according to claims 4 and 5 of the present invention.

FIG. 4 is a front view of an embodiment according to claims 2 and 6 of the present invention.

FIG. 5 is a front view of an embodiment according to claims 3 and 5 of the present invention.

FIG. 6 shows an embodiment according to claim 6 of the present invention;
(A) Front view, (b) Side view, (c) Exploded view of rotation control plate of rotation shaft, (d) Four positions (0, 90, 1) of rotation shaft
80, 270 ° angular position).

FIG. 7 is a development view of a rotation control plate of the rotation shaft according to claim 6 of the present invention.

FIG. 8 is a front view of another embodiment according to claim 6 of the present invention, in which (a) an example in which a control plate is formed on the skeleton side, and (b) an example in which a control groove is formed on the skeleton side. is there.

9A and 9B show a conventional example, in which (a) is one of the conventional examples and (b) is another example of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening / closing shaft 2 Flange with a pin 3 Coil spring for opening / closing shaft 4 Rotating cam for opening / closing shaft 5 Fixed cam for opening / closing shaft 6 Fixed pin 7 Rotating shaft 8 Bracket 9 Rotating shaft spring 10 Rotating cam for rotating shaft 11 Fixed cam for rotating cam DESCRIPTION OF SYMBOLS 12 Stop plate 13 Case for opening / closing shaft 14 Case for rotating shaft 15 E-ring 16 Mounting bracket for rotating shaft 17 Rotating shaft flange 18 Hole for opening / closing shaft fixing 19 Bracket for opening / closing shaft fixing 20 Projection for stopping rotation of opening / closing shaft 21 Opening / closing shaft Rotation stop shaft flange 22 Rotation shaft rotation stop flange 23 Rotation shaft rotation stop protrusion 24 Rotation shaft rotation restriction control plate 25 Rotation shaft rotation restriction shaft 26 Spacer 27 Opening / closing shaft intermediate flange 28 Rotation spacer 31 Externally mounted rotation restricting plate (plate shape) 32 Externally mounted rotation restricting plate (groove shape) 50- 3 position of the rotary shaft 55 opening and closing shaft for winding plate spring 56 the opening and closing shaft leaf spring

Claims (7)

[Claims] 1. A two-axis hinge having a rotating shaft and an opening / closing shaft, wherein the opening / closing shaft has a square cross section, and a flange provided at an end of the opening / closing shaft for coupling to a frame at both ends is inserted. A rotating cam for an opening / closing shaft having a concave, a convex, and a flat surface on both sides thereof, which penetrates with the opening / closing shaft to change friction torque, and having a hole on an outer periphery for fixing a rotating shaft; 2 which is slidable with the shaft and rotates integrally with the shaft, and which comes into contact with both surfaces of the rotating cam for opening and closing shaft, which has a concave, convex, and flat surface on one surface and changes the friction torque on one surface and the other surface has a flat surface.
A fixed section cam for opening and closing shafts, two coil springs for urging a repulsive force between a flange provided at an end of the opening and closing shaft and the fixed cam for rotating shaft, One end is fitted and fixed to the opening / closing shaft rotating cam, and the other end is provided with a stopper plate. Two rotating cams for the rotating shaft that have a concave, convex, and flat surface that changes the friction torque, and the other surface has a flat surface, and the outer periphery of the cam is connected to another body. And two rotating shaft fixed cams, which rotate integrally with the shaft, have a concave, convex, and flat surface that changes friction torque on one surface and abut against the rotating shaft rotating cam that has a flat surface on the other surface. A biaxial hinge comprising one coil spring for urging a repulsive force between the two rotating shaft fixed cams, and at least two side surfaces; Rotating biaxial hinge having a plurality of torque generating portion, wherein a stationary cam arranged concentrically to each control shaft and the rotary shaft so as to contact. 2. A biaxial hinge having a rotating shaft and an opening / closing shaft, wherein an opening / closing shaft for inserting an opening / closing shaft fixing bracket for connecting a frame to both ends having a square cross section, and slidable with the opening / closing shaft. Two open / close shaft fixing cams having a concave, convex, and flat surface and a flat surface on the other surface, which rotate integrally with the shaft and have a concave surface, a convex surface, and a flat surface that change friction torque on one surface; One coil spring for urging a repulsive force between the cams, and abutting against the open / close shaft rotating cam having a concave, convex, and flat surface that penetrates the open / close shaft and changes the friction torque on one side. Two rotating cams for the open / close shaft, and a rotating hole connecting the two rotary cams for the open / close shaft, a hole passing through the rotary shaft and a concave and convex surface and a flat surface on both sides for changing the friction torque on the rotary shaft. A bracket for mounting the shaft and under the bracket for mounting the rotating shaft A rotating shaft fixed cam made of two leaf springs each having a plurality of projections fitted to the rotating shaft and integrally rotating; an E-ring for applying a repulsive force to the rotating shaft spring; A biaxial hinge comprising a shaft flange, a bracket for coupling to another frame, and a rotating shaft for integrally rotating the rotating shaft, a rotating shaft so that the fixed cam comes into contact with the rotating shaft and the opening / closing shaft so as to rotate on two side surfaces. A biaxial hinge having a plurality of torque generating portions, wherein the biaxial hinge is coaxially arranged on each of the hinges. 3. A two-axis hinge having a rotating shaft and an opening / closing shaft, wherein both ends having a rectangular cross section are inserted and fitted with opening / closing shaft fixing brackets for coupling to a frame, and one end has a hole passing through the rotating shaft. An opening and closing shaft having concave, convex, and flat surfaces on the upper and lower sides of the shaft for changing the rotating torque of the rotating shaft; and a friction torque on one surface slidable with the opening and closing shaft and rotating integrally with the shaft. Two fixed cams for an open / close shaft having a concave, convex, and flat surface and a flat surface on the other surface, and one coil for urging a repulsive force between the two fixed cams for the open / close shaft A spring, a rotating shaft penetrating through the opening / closing shaft, two fixed cams for the rotating shaft located above and below the opening / closing shaft slidable with the rotating shaft and rotating integrally with the shaft, and the rotating shaft. And a plurality of springs for the rotating shaft for urging the rotating shaft fixed cam from above and below. A rotating shaft such that a stationary plate and a rotating shaft flange, a bracket for connecting to another frame, and a rotating plate so as to abut against a fixed cam; A biaxial hinge having a plurality of torque generating portions, wherein the biaxial hinge is coaxially arranged on each of the opening and closing shafts. 4. An apparatus according to claim 1, further comprising at least two contact portions formed by a combination of the configuration of the open / close shaft according to claim 1 and two or more contact portions formed by a combination of the configuration of the rotary shaft. 2 having a plurality of torque generating portions characterized by the following:
Shaft hinge. 5. The opening / closing axis regulation of the opening / closing axis is integrally attached to a part of the opening / closing axis rotating cam or the opening / closing axis fixed cam, and the rotation axis regulation of the rotating axis is also performed by the rotating shaft rotating cam or the rotating axis fixed cam. The two-axis hinge according to any one of claims 1 to 4, wherein the hinge is integrally attached to a part of the hinge. 6. A part of the rotary shaft is formed into a cross section having a major axis and a minor axis, and the width of the opening portion abuts the cross section according to the opening / closing angle of the opening / closing axis so that the rotation of the rotary shaft is inhibited. Or a rotation control plate having a width that allows the rotation of the rotation shaft, or the rotation restriction groove or the rotation restriction plate is formed on a part of the body side. A biaxial hinge having a plurality of torque generating portions according to any one of claims 1 to 4. 7. A cross section of each shaft at a portion sliding with the fixed cam so as to rotate integrally with the rotating shaft and the fixed shaft while sliding with the fixed shaft is a shaft processed into a cross section other than a circle. A biaxial hinge having a plurality of torque generating portions according to any one of claims 1 to 4.