WO2007029546A1

WO2007029546A1 - Two-axis hinge device

Info

Publication number: WO2007029546A1
Application number: PCT/JP2006/316894
Authority: WO
Inventors: Sakae Higano; Toshiyuki Itadani; Yuji Hazama; Hitoshi Sato
Original assignee: Mitsubishi Steel Mfg. Co., Ltd.
Priority date: 2005-09-01
Filing date: 2006-08-28
Publication date: 2007-03-15
Also published as: TWI308943B; JP2007064427A; TW200722643A; JP4440189B2

Abstract

A two-axis hinge device in which a first housing and a second housing that are joined by a hinge can be opened into varied states and the degree of freedom of the rotation angle of the first housing and the second housing when they are rotated is increased. Two open/close shafts (10, 11) are placed to join the first housing and the second housing in an openable/closable manner. A torque unit is formed such that fixed cams (16, 18) and rotating cams (15, 19) inserted in the open/close shafts (10, 11) are in contact with each other at contact cam surfaces to generate sliding friction torque or click torque when the open/close shafts (10, 11) are rotated. A hinge is formed such that two or more torque units are independently provided at both ends of a spring (17) inserted in one of the open/close shafts (10 or 11). The rotating cams (15, 19) are formed as one joined part and assembled to both open/close shafts (10, 11). Thus a two-axis hinge device where two single axis hinge are integrated in a parallelly arranged manner is formed.

Description

Specification

2-axis hinge device

Technical field

[0001] The present invention arranges two sets of single-axis hinges used in parallel in a rotating mechanism for folding small electronic devices such as mobile phones, notebook computers, electronic notebooks, DVD monitors, and remote controllers. The present invention relates to a two-axis hinge device.

Background art

[0002] In general, a two-fold type mobile phone has a single-axis hinge device between a first housing in which a keyboard is installed and a second housing in which a liquid crystal monitor (LCD) for capturing images is incorporated. Some are configured to open and close by rotating the second housing (LCD side) around the axis of the 1-axis hinge.

[0003] Furthermore, the two-fold type mobile phone is connected to the first casing by connecting the first casing and the second casing with a two-axis hinge having a structure in which two axes intersect. It can be opened and closed with one uniaxial hinge between the body and the second housing, and the second housing with the liquid crystal motor can be rotated with the other uniaxial hinge perpendicular to it. There is something configured.

[0004] In addition, in a two-fold type mobile phone as shown in FIG. 17, the first casing and the second casing are connected so as to be capable of opening and closing. In the single-axis hinge, the compression coil spring 101 is passed through the shaft 100. The torque generator 101 has two torque generators, each of which has a rotating cam 103, a fixed cam 104, and a force, on both ends of the compression coil spring 101 to achieve high durability, downsizing, and weight reduction. (For example, see Patent Document 1) o

[0005] Since the two-fold mobile phone as described above has a structure in which a single uniaxial hinge is assembled between the first housing and the second housing to perform opening and closing operations, A rotation stopper mechanism that limits the rotation angle is installed to prevent the first and second cases from colliding with each other when they are opened and closed around the shaft hinge. The rotation stopper mechanism is referred to as a so-called housing stopper mechanism, and is provided with protrusions for abutment on the first housing and the second housing on which the hinges are installed. It is configured to limit the opening / closing angle with the second housing. [0006] For this reason, it is common for a two-fold type mobile phone to be used with the case stopper mechanism set to open the second case at a rotation angle of 180 ° or less with respect to the first case. It is.

[0007] In such a two-fold mobile phone, the second housing can be rotated in an angle range close to approximately 360 ° relative to the first housing, or the first housing and the second housing There is a strong demand for diversification of the open state and expansion of the degree of freedom of rotational movement, such as turning it 180 ° and making it level with no step in the open state.

Patent Document 1: Japanese Patent Laid-Open No. 2002-206520

Disclosure of the invention

Problems to be solved by the invention

[0008] In view of the above-mentioned points, the present invention diversifies the open states of the first housing and the second housing that are connected by a hinge, which constitutes a small electronic device that can be opened and closed. A two-axis hinge device that can expand the degree of freedom of the rotation angle when rotating the housing and the second housing is newly provided.

Means for solving the problem

[0009] A first aspect of the biaxial hinge device of the present invention is a biaxial shaft having two opening and closing shafts arranged in parallel for connecting the first housing and the second housing so as to be openable and closable. In the type hinge device, a torque unit configured to generate a sliding friction torque or a click torque during the opening / closing operation in which the fixed cam and the rotating cam inserted through the opening / closing shaft abut on the contact cam surface and the opening / closing shaft rotates is provided. Two or more independent hinges are arranged on both ends of the spring inserted through one open / close shaft to form two pairs of single-shaft hinges. The rotating cams arranged in two sets of hinges are formed and assembled in one joint component common to both opening and closing shafts, so that two single-axis hinges are arranged in parallel and integrated.

[0010] By configuring as described above, a single-axis hinge having two or more torque units that generate sliding friction torque or click torque is configured, and the first casing and the second casing are approximately 36 0. ° It can rotate and can be stopped at any angle, making it possible to open the first housing and the second housing without any steps. Further, during the opening / closing operation of the first casing and the second casing, the other casing can be operated around the opening / closing axis of one casing. Therefore, the first housing and the second housing A variety of states when the housing is opened can be expanded, and the degree of freedom of the rotation angle when rotating the first housing and the second housing can be expanded. Furthermore, the number of parts can be reduced by using the rotating cam as a common part.

[0011] A second aspect of the biaxial hinge device of the present invention is a biaxial shaft having two opening / closing shafts arranged in parallel for connecting the first housing and the second housing so as to be openable / closable. In the type hinge device, there is a torque unit configured to generate a sliding friction torque or a click torque during the opening / closing operation in which the fixed cam and the rotating cam inserted through the opening / closing shaft abut on the contact cam surface and the opening / closing shaft rotates. The two springs inserted through the open / close shafts are arranged independently at two or more locations. Furthermore, the rotation angle of the opening and closing shaft is limited by the contact between the protrusion provided on the lock block arranged to rotate in synchronization with the opening and closing shaft and the protrusion provided on the body stopper that is rotatably attached to the opening and closing shaft. It consists of 2 pairs of 1-axis hinges with a rotation stopper for By configuring the rotating cams arranged in two sets of hinges into a single joint that is common to both opening and closing shafts and assembling them, the two cams can be integrated together in a state where two sets of hinges are arranged in parallel. To do.

[0012] By configuring as described above, a single-shaft hinge having two or more torque units that generate sliding friction torque or click torque is configured, and the first casing and the second casing are stepped. It is possible to have no open state. Therefore, the state when the first housing and the second housing are opened can be varied, and the degree of freedom in the rotation angle when rotating the first housing and the second housing can be expanded. . Furthermore, the number of parts can be reduced by using the rotating cam as a common part.

[0013] A third aspect of the biaxial hinge device of the present invention is a biaxial shaft having two open / close shafts arranged in parallel for connecting the first housing and the second housing so as to be openable and closable. In the type hinge device, fixed cams are arranged on both sides of the rotating cam inserted through the opening and closing shaft, respectively, and both the rotating cam and the corresponding fixed cam are in contact with each abutting cam surface, and the opening and closing shaft rotates. Two sets of one-axis hinges are arranged by arranging torque units configured to generate sliding friction torque or click torque during opening and closing operations. The rotating cams arranged in two sets of hinges are formed in one joint part common to both opening and closing shafts, and assembled so that two single-axis hinges are arranged in parallel.

[0014] By configuring as described above, a single-shaft hinge having two or more torque units that generate sliding friction torque or click torque is configured, and the first housing and the second housing are approximately 36. It can be rotated by 0 ° and can be stopped at an arbitrary angle, and the first casing and the second casing can be opened without any step. Further, during the opening / closing operation of the first casing and the second casing, the other casing can be operated around the opening / closing axis of one casing. Accordingly, various states can be obtained when the first housing and the second housing are opened, and the degree of freedom of the rotation angle when rotating the first housing and the second housing can be increased. Furthermore, by using the rotating cam as a common part, the number of parts can be reduced and the biaxial hinge device can be made smaller.

[0015] In each of the above embodiments, the body stopper may be formed and assembled on one connecting component common to both the opening and closing shafts. The number of parts can be further reduced by using a common body stopper.

[0016] In each of the above aspects, a rotation stopper for limiting the rotation angle may be provided on one of the two open / close shafts of the uniaxial hinge.

[0017] By configuring as described above, it is possible to open the first housing and the second housing without any step, and the housing can be stopped at an arbitrary angle. Also, the opening / closing axis of one housing can be preferentially rotated at the start of rotation.

[0018] In each of the above embodiments, the angle and number of the uneven cam groove portions formed on the contact cam surface of the fixed cam and the rotating cam may be changed for each torque unit. Thus, a plurality of different click torques can be generated during the rotation of the opening / closing shaft.

[0019] In each of the above aspects, the contact cam surface of the fixed cam and the rotating cam constituting the torque unit disposed on the opening / closing shaft may be formed flat to generate only sliding friction torque.

[0020] From this, it is possible to increase the degree of freedom of the angle and the number of stops when the casing to be rotated is stopped.

[0021] In each of the above embodiments, a fixed part is provided in which a part of the opening / closing shaft is formed in a cross-sectional shape having a major axis and a minor axis so as to be movable in the axial direction of the opening / closing axis and to rotate in synchronization with the opening / closing axis The cam and a rotating cam installed rotatably on the opening / closing shaft may be configured to be brought into pressure contact with the urging force of the spring on the contact cam surface to generate friction torque! / ヽ.

[0022] Thereby, at least the operation of the fixed cam can be stabilized, and so-called looseness can be prevented. [0023] In each of the above aspects, the torque unit is configured to be housed in a hinge case having substantially the same internal shape as the outer shape of the rotating cam formed as one common component for both opening and closing shafts. Also good.

[0024] By housing the torque unit in the case, the housing design and threading can be simplified. In addition, since each open / close shaft can be concentrated and threaded on one side of the housing, an area where a dermy shaft or wiring can be mounted can be secured on the opposite side of each open / close shaft.

[0025] In each of the above aspects, a joint portion with the first housing or the second housing may be formed at both ends of each of the two opening / closing shafts.

[0026] Thereby, when the biaxial hinge device is assembled to the first casing and the second casing, the two-shaft hinge device is supported at both ends of the opening and closing shaft, so that the fixing force can be improved and the reinforcing structure of the casing can be simplified. Can be achieved.

[0027] In each of the above aspects, a fastening hole for fastening parts to be fastened to the device housing or the case may be formed in the rotating cam formed as one part common to both the opening and closing shafts.

[0028] This makes it possible to easily fix the biaxial hinge device to the device casing or case and firmly fix the hinge device to prevent rattling and improve durability.

The invention's effect

[0029] According to the biaxial hinge device of the present invention, the open state of the first housing and the second housing, which constitute a small electronic device that can be opened and closed, is varied, There is an effect that the degree of freedom of the rotation angle can be expanded when rotating the first housing and the second housing.

Brief Description of Drawings

FIG. 1 is an exploded front view showing a component configuration of a biaxial hinge device according to a first embodiment of the present invention.

FIG. 2 is a front view of the assembled state showing the biaxial hinge device according to the first embodiment of the present invention.

FIG. 3 is a component explanatory diagram showing an opening / closing shaft of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 4A is a front view of a stopper lock block of the biaxial hinge device according to the first embodiment of the present invention. FIG. 4B is a side view of the stopper lock block of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 4C is a rear view of the stopper lock block of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 4D] A front view of the body stopper for stopper of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 4E] is a side view of the body stopper for stopper of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 5A is a side view of the first rotating cam of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 5B is a front view of the first rotating cam of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 5C is a rear view of the first rotating cam of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 5D is a front view showing a first rotating cam of another configuration.

FIG. 6A is a front view showing a torque plate of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 6B] A side view showing the torque plate of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 6C is a front view and a side view showing the first fixed cam of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 6D is a side view showing the first fixed cam of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 7 is a front view of an assembled state showing a biaxial hinge device according to a second embodiment of the present invention.

8A] A side view showing a compression coil spring of the biaxial hinge device according to the first embodiment of the present invention.

FIG. 8B is a front view and a side view showing a disc spring that can be substituted. FIG. 9A is a left side view showing a biaxial hinge device according to a third embodiment of the present invention.

FIG. 9B is a front view of FIG. 9A.

FIG. 9C is a right side view of FIG. 9B.

FIG. 9D is a left side view showing the case portion of FIG. 9C.

FIG. 9E is a front view showing the case portion of FIG. 9D.

FIG. 9F is a front view showing an assembled state of the other configuration of FIG. 9E.

FIG. 9G is a front view of the assembled state showing still another configuration of FIG. 9F.

FIG. 10 is a front view of an assembled state showing a biaxial hinge device according to a fourth embodiment of the present invention.

FIG. 11 is a front view of an assembled state showing a biaxial hinge device according to a fifth embodiment of the present invention.

FIG. 12 is a front view of an assembled state showing a biaxial hinge device according to a sixth embodiment of the present invention.

13A] A side view showing the first rotating cam portion of the biaxial hinge device according to the seventh embodiment of the present invention.

FIG. 13B is a front view of FIG. 13A.

13C] A front view showing a main part of the biaxial hinge device according to the seventh embodiment of the present invention.

14] A front view showing a biaxial hinge device according to an eighth embodiment of the present invention. FIG. 15A is a side view illustrating a variation in the open / closed state of a two-fold type mobile phone including the biaxial hinge device of the present invention.

FIG. 15B is a side view illustrating a variation in the open / closed state of a two-fold type mobile phone including the biaxial hinge device of the present invention.

FIG. 15C is a side view illustrating a variation in a folded state of a two-fold type mobile phone including the biaxial hinge device of the present invention.

[15D] FIG. 15D is a side view illustrating a variation in an open / closed state of a two-fold type mobile phone including the biaxial hinge device of the present invention.

[15E] Open / close state variability of a double-folded mobile phone equipped with the biaxial hinge device of the present invention It is a side view which illustrates an aceon.

FIG. 15F is a side view illustrating a variation in a folded state of a two-fold type mobile phone including the biaxial hinge device of the present invention.

FIG. 15G is a side view illustrating a variation in an open / closed state of a two-fold type mobile phone including the biaxial hinge device of the present invention.

FIG. 15H is a side view illustrating a variation in the open / closed state of a two-fold type mobile phone including the biaxial hinge device of the present invention.

FIG. 151 is a side view illustrating a variation in a folded state of a two-fold type mobile phone including the biaxial hinge device of the present invention.

FIG. 16 is a perspective view showing a two-fold type mobile phone provided with the biaxial hinge device of the present invention.

FIG. 17 is a front view of an assembled state illustrating a conventional single-axis hinge.

BEST MODE FOR CARRYING OUT THE INVENTION

[0031] Hereinafter, a first embodiment of the biaxial hinge device of the present invention will be described with reference to Figs.

This will be described with reference to FIGS. 6, 8, 15 and 16. FIG.

[0032] In the first embodiment, the biaxial hinge device 1 is a first case 7 in which a keyboard 7-1 of a two-fold type mobile phone illustrated in FIG. 16 is disposed, and an LCD monitor. Mounted so as to be connected to the second housing 8 on which 8–1 is placed, enabling a state of being opened in a substantially horizontal state with no step between the two housings.

[0033] The biaxial hinge device 1 is shown in FIG. 1 (parts relating to an example of the embodiment of the invention described in claim 2 are shown) and FIG. 2 (implementation of the invention described in claim 3). As shown in the assembly example related to an example of the form), the rotation shafts of the two pairs of single-shaft hinges are arranged in parallel to form a single unit.

In the biaxial hinge device 1, one opening / closing shaft 10 is assembled to the first casing 7 (keyboard side), and the other opening / closing axis 11 is assembled to the second casing 8 (LCD side).

[0035] The pair of opening and closing shafts 10 and 11 is made of metal, and is formed into a predetermined shape by processing of a cut ij, a header, and the like, and is manufactured by performing heat treatment and surface treatment as necessary. A pair of the opening / closing shaft 10 and the opening / closing shaft 11 is shown in FIG. 3 (an example of the embodiment of the invention described in claim 12 is shown). As shown in the figure, a first spline-shaped part 11 1 having an oval shape (a cross-sectional shape having a major axis and a minor axis other than a circle) in which a part of a circle with a large diameter is cut from the left in the figure, A round shaft 11-2 with a circular cross-section and a second spline-shaped part 11 3 with a small oval shape with a small-diameter circle cut off, and high accuracy! In order to prevent this, a fixing portion 11-4 having a substantially square cross section is formed.

[0036] As shown in Fig. 2, a pair of opening and closing shafts 10 and 11 that are parallel to each other and arranged at a predetermined interval include a pair of stopper lock blocks 12 and an integrally structured stopper body stopper 13 and , A pair of torque plates 14, a first rotating cam 15 of an integrated structure, a pair of first fixed cams 16, a pair of compression coil springs 17, a pair of second fixed cams 18, and a second rotation of an integrated structure Assemble the cam 19 and the pair of riveting rings 20.

In the following description, the rotation axis in the biaxial hinge device of the opening / closing shaft 10 or the opening / closing shaft 11 is “rotation axis”, the rotation center is “rotation center”, and the radial direction relative to the rotation center is “diameter”. It is called “direction”.

[0037] FIG. 4A, FIG. 4B, and FIG. 4C are provided in the stopper lock block 12 (note that FIG. 4A, FIG. 4B, and FIG. 4C show parts related to an example of the embodiment of the invention of claim 3). As shown in Fig. 4, a fitting recess 12-2 for fitting into the first spline-shaped portion 11-1 and a shaft hole 12 4 through which the round shaft portion 11 2 passes are drilled. .

Furthermore, the stopper lock block 12 is provided with a protrusion 12-3 having a trapezoidal cross section, for example, that forms a rotation stopper and is perpendicular to the rotation axis. Two protrusions 12-3 are provided at the symmetrical positions shown by hatching in FIG. 4C around the shaft hole 12-4.

[0039] In the stopper lock block 12, the angle in the range where the protrusion 12-3 is provided around the rotation axis is 40 °, and the angle in the range of the flat portion 12-6 (shown in white in Fig. 4C) Is set to 14 0 °.

[0040] Each stopper lock block 12 configured as described above is integrated with the boundary between the first spline-shaped portion 11-1 and the round shaft portion 11-2 between the opening and closing shaft 10 and the opening and closing shaft 11. It is fitted and arranged so as to rotate.

[0041] The stopper body stopper 13 is shown in FIGS. 4D and 4E (note that FIGS. 4D and 4E show parts related to an example of the embodiment of the invention described in claim 3). like, It is assembled as a common part to the open / close shafts 10 and 11.

[0042] The body stopper 13 for the stopper is provided with a shaft hole 13-2 and a shaft hole 13-5 through which each of the opening and closing shafts 10, 11 is rotatably penetrated, and a rotation stopper is formed around the shaft hole 13-2. Protrusions 13-4 with a trapezoidal cross section perpendicular to the rotation axis are provided.

[0043] One surface along the axial direction of the protrusion 13-4 is in contact with one surface along the axial direction of the protrusion 12-3 of the stopper lock block 12, thereby limiting the rotation angle. Configure.

[0044] In the stopper body stopper 13, the round shaft portions 11-2 of the open / close shafts 10, 11 are rotatably inserted into the corresponding shaft holes 13-2 and 13-5. The side surface 136 is formed on a flat surface that does not form the uneven groove surface.

[0045] In the stopper body stopper 13 shown in FIG. 4D, two stopper protrusions 13-4 shown symmetrically by hatching in the drawing with the shaft hole 13-2 or 13-5 as the shaft center, and the white portion shown in the figure The flat part 13-3 shown in Fig. 1 is provided. With respect to the rotation axis, the angle of the range where the stopper protrusion 13-4 is provided is 50 °, and the angle of the range where the flat portion 13-3 is provided is 130 °.

[0046] The torque plate 14 is a component for generating torque by sliding friction with the flat plate surface of the first rotating cam 15. FIGS. 6A and 6B (Note that FIGS. 6A and 6B are claims) 1, claim 3, claim 9, and claim 11, parts related to an example of the embodiment of the invention are shown) Therefore, a fitting shaft hole 14-2 formed in an oval shape that fits into the second spline-shaped portion 11-3 is drilled.

In FIG. 6B, the side surfaces 14 3 and 14 4 of the torque plate 14 are shown as flat plate surfaces, but grooves or holes (not shown) are provided on the circumference of the shaft hole 14-2 in the axial radial direction. Also, it can be configured to increase friction torque or install a grease reservoir! / ヽ.

[0048] The first rotary cam 15 and the second rotary cam 19 are shown in Figs. 5A to 5D (Note that Figs. 5A to 5D are embodiments of the inventions described in claims 1, 3 and 9). As shown in the figure, the parts related to the example are shown in FIG. The second rotating cam 19 has the same structure as the first rotating cam 15. Therefore, the first rotating cam 15 will be described below.

[0049] In the first rotating cam 15, shaft holes 15-2 and shaft holes 15-4 in which the second spline-shaped portions 11 3 are rotatably inserted are formed at predetermined intervals. Protrusions (the parts indicated by “No” and “tching” in the figure) 15-1, 15-3, and 15-7 are provided around them. Further, a plurality of flat portions (bottom portions) 15-5 and slope portions 15-6 are formed at positions 180 [deg.] Symmetrical about the respective shaft holes.

[0050] As shown in FIG. 5D, the first rotating cam 15 has a protrusion 15-7 centered on the rotating shaft.

There are two grooved cam surfaces provided in the range of 54 °, one slope 15-6 in the range 36 °, and one flat 15-5 in the range 54 °.

[0051] When the first rotating cam 15 is housed and fixed in the hinge case 25 (described later), the projection 15-8 as shown in FIGS. 5C and 5D is provided to prevent the biaxial hinge from moving or rattling. It may be provided on the outer periphery.

[0052] The first fixed cam 16 and the second fixed cam 18 are shown in FIG. 6C and FIG. 6D (Note that FIG. 6C and FIG. 6D are shown in claims 1, 3, 9, and 11). As shown in the drawings, parts related to an example of the embodiment of the present invention are shown), each open / close shaft 10, 11 is inserted to rotate in synchronization with each open / close shaft 10, 11. A shaft hole 16-2 formed in an oval shape is drilled. The first fixed cam 16 and the second fixed cam 18 are slidable in the axial direction of the open / close shafts 10 and 11. Since the second fixed cam 18 has the same structure as the first fixed cam 16, the first fixed cam 16 will be described below.

[0053] The first fixed cam 16 has a protruding portion (a portion indicated by a hatching in the figure) 16-3, a flat portion (bottom portion) 16-5, and a slope portion 16 along the plane circumference of the disc-shaped cam. — Configure multiple 4s at 180 ° symmetrical positions around the shaft hole 16-2. In the first fixed cam 16 shown in FIG. 6C, with the rotation axis as the center, the protrusion 16-3 is in the range of 54 °, the one slope 16-4 is in the range of 36 °, and the one flat portion 16-5 is Installed in the range of 54 °. The grooved cam surface of the first fixed cam 16 shown in FIG. 6C has the same configuration as the grooved cam surface shown in the first rotating cam 15 of FIG.

[0054] Both cams 15 and 16 constitute a torque unit that generates click and sliding torque by repeated alignment contact and non-alignment contact of the concave and convex grooves, and the click torque is rotated twice during about 360 ° rotation. generate.

It should be noted that the concave and convex cam grooves of the rotating cam 15 of FIGS. 5A to 5D and the fixed cam 16 of FIGS. 6A to 6D are respectively formed as protrusions within a range of an angle of 54 ° at a 180 ° symmetrical position about the rotation axis. The cam is not limited to the above-described configuration in which the flat portion is installed, but may be configured as a cam whose number and angle of the concave and convex grooves are changed according to the necessity of the click position and torque strength. Furthermore, torque units can be installed on the same axis with different click characteristics.

. Further, the shape of the concave and convex grooves shown in FIGS. 5 and 6 is not limited to a fan-shaped or trapezoidal shape having a slope, but may be a cylindrical or quadrangular prism-shaped boss, or a combination of a boss and a hole.

[0056] The compression coil spring 17 is shown in FIG. 8A (note that FIGS. 8A and 8B show parts related to an example of the embodiment of the invention described in claims 1 and 3). Thus, both end surfaces are ground in parallel, and the coil portion is configured as a compression coil spring formed in a size that can be freely moved on each of the open / close shafts 10 and 11. The compression coil spring 17 is arranged between the back plane side of the grooved force surface of the fixed cam 16 and the back plane side of the grooved cam surface of the second fixed cam 18.

It is to be noted that the disc spring 17-1 shown in FIG. 8B can also be made by using a pressing plate with a spring plate, and can be used in place of the compression coil spring 17. In the present invention, either the compression coil spring 17 or the disc spring 17-1 can be selected and used from specifications such as the size and durability of the hinge.

[0058] The riveting ring 20 is configured to be fixed to the fixing portions 11-4 of the opening and closing shafts 10, 11 by a cash mechanism.

[0059] Next, a procedure for assembling the biaxial hinge device 1 using the components having the above-described configuration will be described.

[0060] When assembling the biaxial hinge device 1, first, the lock blocks 12 are respectively inserted into the opening / closing shafts 10 and 11 at the boundary between the first spline-shaped portion 11-1 and the round shaft portion 11-2. Further, the body stopper 13 which is a common part is inserted into the portion of the round shaft portion 11-2, and each torque plate 14 is inserted into the portion of the second spline shape portion 113.

[0061] Next, a first rotating cam 15, which is a common part having a larger outer shape than the other parts, is inserted into the second spline-shaped part 11 3 portion of each of the opening and closing shafts 10, 11, and the force is also fixed to the first. Each cam 16 is threaded, and the concave and convex groove cam surface of the fixed cam 16 is brought into contact with the concave and convex groove cam surface of the first rotating cam 15. Thread it up to make it stand.

Next, a compression coil spring 17 is passed through the second spline-shaped portion 113 portion of each of the open / close shafts 10 and 11 through the back plane side of the grooved cam surface of the fixed cam 16. Further, a second fixed cam 18 is inserted into the second spline-shaped portion 11-3 portion of each of the opening and closing shafts 10, 11 as a second torque generating portion, followed by the compression coil spring 17, and the second component is a common part. Assembling so that the cam surface comes into contact with the cam surface of the second fixed cam 18 by inserting the two-rotating cam 19, and finally fixing the portion 11-4 with the ribeting ring 20 being fixed The two-shaft hinge device 1 as shown in Fig. 2 is completed.

[0063] When the rivet ring 20 is fixed to the fixing part 11-4, the riveting ring 20 is press-fitted to the fixing part 11-4 of each of the opening and closing shafts 10, 11 while applying a load so as to compress the compression coil spring 17. After that, the shaft end is fixed by caulking.

[0064] In the biaxial hinge device 1 shown in Figs. 1 and 2, the components assembled to the opening / closing shaft 10 and the opening / closing shaft 11 are basically configured to have the same shape and movement. ing. However, the two-shaft hinge device of the present invention may be configured such that the shape, number of components, and movement of the parts constituting the hinge are different between the opening / closing shaft 10 and the opening / closing shaft 11 depending on the hinge specification.

[0065] In the two-shaft hinge device 1 shown in Fig. 2, the state force of the first rotating cam 15, the first fixing force drum 16, the second fixing cam 18, and the second rotating cam 19 of the torque unit is different from each other. It is press-contacted in a sliding state. In the biaxial hinge device 1, in this sliding state, the compression coil spring 17 is compressed most in the axial direction and exhibits a large repulsive force.

[0066] In the biaxial hinge device 1, the click torque is an uneven groove between the first rotating cam 15 and the first fixed cam 16, and between the second rotating cam 19 and the second fixed cam 18. Generated at the four torque units where the attached cam surface is aligned and abutting.

[0067] The sliding torque is measured between the stopper lock block 12 and the stopper body stopper 13, between the stopper body stopper 13 and the torque plate 14, and between the torque plate 14 and the first rotating cam 15. And a total of 8 locations between the second rotating cam 19 and the riveting ring 20. If the fixed and rotating cams are in misaligned contact, a sliding torque is generated.

[0068] As a rotation stopper for limiting the rotation angle in the biaxial hinge device 1 shown in FIG. As shown in Fig. 4, the protrusion 12-3 of the stopper lock block provided in the range of 40 ° around the rotation axis is the same as that of the body stopper 13 for the stopper provided in the range of 130 ° around the rotation axis. The flat part 12-6 of the stopper lock block provided in the range of 140 ° is slidable on the protrusion 13-4 of the body stopper for the stopper provided in the range of 50 °. It is configured as accessible.

[0069] The rotation range of both parts configured in this way is within the angular range of the flat portion 13-3 and the flat portion 12-6, with the protrusion 12-3 and the protrusion 13-4 centered on the rotation axis, respectively. It is set as an angle until it rotates and abuts against the projection 13-4 and the projection 123 located at both ends of the flat portion 13-3 or the flat portion 12-6.

[0070] In this example, flat 13-3 (130 °) protrusion 12-3 (40 °) = 90 ° and flat 12-6 (140 °) —protrusion 13-4 (50 °) = 90 ° It is a rotatable range. In the example of Fig. 4D, the angle settings of the protrusion 13-4 and the flat portion 13-3 are the same for the upper and lower rotation stoppers, and if two stopper lock blocks 12 shown in Fig. 4C are used, each of the upper and lower 1 The rotatable range of the shaft hinge is 90 °. In this example, the maximum rotation angle of the biaxial hinge device 1 is 180 °, which is twice 90 °.

[0071] It should be noted that the rotation stoppers are set according to the number and angle of protrusions and flat portions, the method of installing them in parallel along the circumference in the axial direction, the lock block 12 for stoppers, and the body stopper 13 for stoppers. It is possible to combine methods that use parts with different condition settings for the open / close shafts 10 and 11, and a wider variety of combinations are possible within a 360 ° rotation range. Further, the material of the stopper lock block 12 and the stopper body 13 can be made of metal, grease, etc. having excellent strength and wear resistance. The protrusions may be formed by embedding pins in addition to being formed by pressing and resin molding.

Next, FIG. 7 shows the biaxial hinge device according to the second embodiment of the present invention (note that FIG. 7 shows the implementation of the invention according to claim 1 for the biaxial hinge device of the present invention). An example of assembly related to an example of this form is shown).

The biaxial hinge device 1 shown in FIG. 7 has a configuration in which monoaxial hinges are arranged in parallel by rotating cams 15 and 19 which are common parts, and are integrated together. The biaxial hinge device 1 is uneven on the open / close shafts 10 and 11. Insert the first rotating cam 15 with groove, the first fixed cam 16 with concave and convex grooves, the compression coil spring 17, the second fixed cam 18, and the second rotating cam 19, and finally the rivet ring 20 on each open / close shaft 10 , 11 and fixed to the fixing part 11-4 by crimping after press-fitting.

[0074] In the state shown in FIG. 7, the biaxial hinge device 1 is configured such that the first rotating cam 15, the second rotating cam 19, the first fixed cam 16, and the second fixed cam 18 The cam is in an inconsistent state and is generating sliding torque. In the state shown in FIG. 7, between the back plate portion of the grooved surface of the first rotating cam 15 and the end surface portion of the first spline-shaped portion 111 of each of the opening and closing shafts 10, 11, and the second rotating cam 19 Generates sliding torque due to friction during rotation at the four locations of the back plate of the grooved surface and the plate of the riveting ring 20.

[0075] In the biaxial hinge device 1 shown in Fig. 7, the rotation range of each of the opening and closing shafts 10, 11 is not limited by the stopper lock block 12 and the stopper body stopper 13, so the largest rotation is achieved. Provides freedom of movement.

It should be noted that since the configuration, operation, and effects in the second embodiment other than those described above are the same as those in the first embodiment described above, description thereof is omitted.

Next, for a biaxial hinge device according to a third embodiment of the present invention, FIG. 9 (note that FIG. 9 shows parts related to an example of the embodiment of the invention described in claim 13). Explained). The biaxial hinge device according to the third embodiment is configured by housing a biaxial hinge device 1 with a rotation stopper in a case 21.

[0078] As shown in Figs. 9D and 9E, the case 21 is provided with a bottom plate 21-2 on one side of a cylindrical case having a cross-section, and the opening and closing shafts 10, 11 penetrate the bottom plate 21-2. Drill holes 21-3 to be constructed.

[0079] As shown in FIGS. 9A, 9B, and 9C, the biaxial hinge device of the present embodiment is substantially the same as the outer shape of the first rotating force drum 15, the second rotating cam 19, and the stopper body stopper 13. A two-shaft hinge device 1 is housed in a case 21 having the inner shape.

[0080] In the biaxial hinge device 1 configured to be housed in the case 21, the open / close shafts 10 and 11 are passed through the shaft holes 2 1 3 drilled in the case 21 and then extended to the outside of the case 21. By fixing the riveting ring 20 to the fixed part 1 1 -4 by caulking, the biaxial hinge device 1 and the case 21 are integrated. [0081] The biaxial hinge device 1 configured to be housed in the case 21 is in a state where the open / close shaft 11 is rotated by 90 ° with respect to the open / close shaft 10 in the state shown in FIGS. 9A, 9B, and 9C. The torque unit cam on the open / close shaft 11 side is in the clicked state, and the torque unit on the open / close shaft 10 side is in the sliding state.

[0082] As shown in Fig. 9B, the two-shaft hinge device 1 housed in the case 21 is configured with the outer shapes of the first rotating cam 15, the second rotating cam 19 and the stopper body stopper 13. And the force stored in a state where the inner wall of the case 21 is in contact with each other.

The biaxial hinge device 1 housed and configured in the case 21 is in the state shown in FIG. 9B, with the opening / closing shaft 10 in the sliding torque and the opening / closing shaft 11 in the click torque state. Now, when the open / close shafts 10 and 11 are to be rotated, the open / close shaft 10 having a small friction torque first moves. By utilizing this, in the biaxial hinge device 1 of the third embodiment, only one side of the first housing or the second housing connected to the opening / closing shaft 10 or the opening / closing shaft 11 is rotated first. A rotation priority operation that starts or stops one side of the housing first is possible. The rotation priority operation can be used together with the rotation stopper function.

FIG. 9F shows a configuration in which the biaxial hinge device 1 shown in FIG. 7 is fixed in the fixing plate 22 and the fixing ring 23 instead of the fixing means by the riveting ring 20 after being housed in the case 21. Show.

FIG. 9G (note that FIG. 9G shows parts related to an example of the embodiment of the invention described in claim 14) is a case where the biaxial hinge device 1 shown in FIG. A configuration of a hinge unit in which the open / close shafts 10 and 11 are extended and the force at both ends of the case 21 is also extended is shown.

[0086] In the hinge unit, the opening and closing shaft extension parts 10-12 and the extension parts 11 12 that extend the force at both ends of the case 21 can be joined to the housing with the structure of both bearings. There is an advantage that simplification of the housing design is possible.

[0087] The configuration, operation, and effects of the third embodiment other than those described above are the same as those of the first embodiment described above, and thus description thereof is omitted.

Next, FIG. 10 shows a biaxial hinge device according to a fourth embodiment of the present invention (note that FIG. 10 is an example of an embodiment of the invention described in claims 3 and 11). Show) I will explain more. The biaxial hinge device according to the fourth embodiment is configured such that the characteristics of the torque units of the opening / closing shaft 10 and the opening / closing shaft 11 are different.

[0089] The biaxial hinge device 1 shown in FIG. 10 is different from the biaxial hinge device 1 with a rotation stopper shown in FIG. By configuring the first rotating cam 15, the second rotating cam 19, the first fixed cam 16 and the second fixed cam 18 as a flat-plate rotating cam with no uneven grooves, only sliding torque is generated. . With this configuration, the opening / closing shaft 11 has six sliding torque surfaces.

[0090] It should be noted that since the configuration, operation, and effects in the fourth embodiment other than those described above are the same as those in the first embodiment described above, description thereof will be omitted.

Next, for a biaxial hinge device according to a fifth embodiment of the present invention, FIG. 11 (note that FIG. 11 is an example of an embodiment of the invention described in claims 8 and 11) Will be explained.

[0092] The biaxial hinge device 1 shown in FIG. 11 is different from the biaxial hinge device 1 with a rotational stopper shown in FIG. No groove Configured as a torque unit with a flat plate cam.

[0093] The single-shaft hinge portion of the open / close shaft 10 has a configuration in which the cam operating state is changed by the left and right torque units in the state shown in FIG. 11, and the cam groove of the left unit is not aligned (sliding torque). The right side is aligned (click torque).

[0094] In the biaxial hinge device 1, means for changing the direction of the oval shaft hole 16-2 of the first fixed cam 16 (second fixed cam 18) shown in FIG. 6C or the arrangement angle of the protrusion 16-3 Accordingly, the click positions of the left and right torque units can be configured to be different from each other.

[0095] Since the configuration, operation, and effects in the fifth embodiment other than those described above are the same as those in the first embodiment described above, description thereof will be omitted.

Next, a biaxial hinge device according to a sixth embodiment of the present invention will be described with reference to FIG. 12 (note that FIG. 12 shows an example of the embodiment of the invention described in claim 1). explain. In the biaxial hinge device according to the sixth embodiment, the left and right torque units included in the opening and closing shafts 10 and 11 are configured such that the generation angle of the click torque differs between the left and right. [0097] In the biaxial hinge device 1 shown in Fig. 12, the groove cam of the torque unit is arranged according to the click strength (suction and de-output), the number of clicks during 360 ° rotation, and the opening and closing shafts 10, 11. It can be arbitrarily designed and configured according to the request for priority rotation operation, which one starts or stops rotating first.

[0098] Since the configuration, operation, and effects of the sixth embodiment other than those described above are the same as those of the first embodiment described above, description thereof will be omitted.

Next, a biaxial hinge device according to a seventh embodiment of the present invention will be described with reference to FIG. 13 (note that FIG. 13 shows an example of an embodiment of the invention described in claim 15). explain. The biaxial hinge device according to the seventh embodiment is provided with a screw hole 15-10 for fixing the hinge in the projection 15-3 of the first rotating cam 15, and a hinge case 25 as an equipment housing or case. The mechanism part of the biaxial hinge device is fastened with a screw 26 that is a fastening part (for example, a screw, a rivet, or a pin) and integrated together.

[0100] In the configuration in which the mechanism portion of the biaxial hinge device is fastened to the hinge case 25 in this way, the hinge moves in the case 25, or the backlash is generated by the insertion clearance of each member of the hinge unit. Can be prevented.

[0101] The configuration, operation, and effects of the seventh embodiment other than those described above are the same as those of the first embodiment described above, and a description thereof is omitted.

Next, a biaxial hinge device according to an eighth embodiment of the present invention will be described with reference to FIG. 14 (note that FIG. 14 shows an example of the embodiment of the invention described in claim 5). explain. The biaxial hinge device according to the eighth embodiment includes the first fixed cam 16 and the second fixed cam on both side surfaces of the first rotary cam 15 which is a common part for connecting the single axis hinge portions in parallel. A grooved cam surface that abuts each of 18 is formed.

[0103] That is, in the biaxial hinge device 1 shown in Fig. 14, the grooved cam surface is provided on each of the opening and closing shafts 10, 11 at the center in the longitudinal direction of the second spline-shaped portion 11-3 and on both side surfaces. A first rotating cam 15 with a formed is disposed. The corresponding first fixed cam 16 and second fixed cam 18 are brought into contact with the grooved cam surfaces on both sides, respectively, and the first spline-shaped portion 11-1 and the round shaft portion 1 卜 2 boundary are 1 Spline-shaped part 11— Insert a compression coil spring 17 between the stepped end face of 1 and the first fixed cam 16 and between the riveting ring 20 and the second fixed cam 18. It is configured to be pressed through.

In addition, in the biaxial hinge device 1 shown in FIG. 14, in addition to forming two sets of torque units at the center of the open / close shafts 10 and 11, other torque units are provided on both sides of each compression coil spring 17. Additional configurations may be used.

It should be noted that since the configuration, operation, and effects in the eighth embodiment other than those described above are the same as those in the first embodiment described above, description thereof is omitted.

Next, the first case 7 and the second case in the two-fold type mobile phone in which the first case and the second case are combined by the biaxial hinge device 1 configured as described above. Various open states with respect to the housing 8 and a rotation state indicating the degree of freedom of the angle between the first housing 7 and the second housing 8 will be described with reference to FIG.

[0107] FIG. 15A shows a state in which both the casings 7 and 8 are closed and the keyboard 7-1 and the LCD 8-1 face each other. FIGS. 15B and 15C show a case where either the first housing 7 or the second housing 8 is rotated 90 ° from the state of FIG. 15A.

15D, FIG. 15E, and FIG. 15F show the case where either the first housing 7 or the second housing 8 is rotated 90 ° and opened 180 ° from the state shown in FIGS. 15B and 15C. . FIG. 15G and FIG. 15H show the case where either the first casing 7 or the second casing 8 is rotated 90 ° and opened to 270 °.

FIG. 151 shows a state in which either the first housing 7 or the second housing 8 is rotated about 360 ° and the first housing 7 and the second housing 8 are opened. The closed state from FIG. 151 to FIG. 15A in the fully opened state can be realized by reversing the above-mentioned operation order.

[0110] The opening and closing operations of the first housing 7 and the second housing 8 shown in FIG. 15 are the rotational torques at the time of starting between the opening and closing shafts 10 and 11, respectively. Shows the variety of movement caused by the difference or the configuration with a rotation stopper. Although not shown, if the two sets of single-shaft hinges configured for the open / close shaft 10 and the open / close shaft 11 in the two-shaft hinge device 1 have the same torque specifications, the first housing The movement of 7 and the second casing 8 can always be operated while maintaining the same opening angle between the perpendicular to the case 21 and the two casings.

[0111] As shown in FIG. 15E (note that FIG. 15E shows an example of the embodiment of the invention described in claim 7), the case 21, the first and second housings are horizontal. Open / close shaft 10 and open This is realized when the rotation angle of the single-shaft hinge part formed on the closed shaft 11 is the same (here, the rotation angle is 90 °). Further, in the configuration of the biaxial hinge device 1, a state in which the opening / closing shaft 11 rotates on the circumference with the opening / closing shaft 10 as the center of rotation (FIGS. 15A, 15B, 15E, 15G) is drawn. , Fig. 151) can be realized by alternately rotating the opening / closing shaft 10 and the opening / closing shaft 11 at the same angle.

[0112] The state shown in FIG. 15D is when the first housing 7 and the second housing 8 shown in FIG. 15A are closed, and only the hinge of the opening / closing shaft 11 of the second housing 8 is opened 180 °. It becomes. The state shown in FIG. 15F shows a state where only the hinge of the opening / closing shaft 10 of the first housing 7 is opened. The states shown in Fig. 15D and Fig. 15F show the maximum opening angle that can be realized even with the conventional example using a single-axis hinge and the positional relationship between the housings.

[0113] The biaxial hinge device of the present invention combines a click torque generated by a grooved cam and a rotation stopper mechanism of the hinge itself with a commonly used sliding torque mechanism or a casing stagger mechanism. In this way, one housing is stopped at an arbitrary angle by design, and it is opened and closed so as not to generate a step between the two housings. Can be realized.

[0114] It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various other configurations can be taken without departing from the gist of the present invention.

Industrial applicability

[0115] The biaxial hinge device of the present invention can be used for a rotation mechanism of various devices.

Explanation of symbols

[0116] 1 Hinge unit

2 Hinge unit without stopper

3 Hinge unit with case

4 Double cam type single axis hinge

7 First housing (keyboard side)

8 Second housing (LCD side)

10 First open / close shaft

11 Second open / close shaft Stokno lock block Stopper body stopper Torque plate

1st rotating cam

First fixed cam

Compression coil spring

Second fixed cam

Second rotating cam

Riveting ring case

Fixing plate

Ring for fixing

Housing hinge case Fixing screw

Claims

The scope of the claims

[1] In a two-shaft type hinge device with two opening and closing shafts for connecting the first and second housings so that they can be opened and closed,

A torque unit configured to generate a sliding friction torque or a click torque during an opening / closing operation in which the fixed cam and the rotating cam inserted through the opening / closing shaft abut on a contact cam surface and the opening / closing shaft rotates is the one unit. 2 pairs of 1-axis hinges constructed by placing two or more locations independently on both ends of the spring inserted through the open / close shaft,

By forming the rotary cams arranged on the two sets of one-shaft hinges on one joint component common to the two open / close shafts and assembling them, two sets of the one-axis hinges are arranged in parallel. A two-shaft hinge device characterized by being integrated.

[2] A biaxial hinge device for connecting the first housing and the second housing so as to be openable and closable,

Two opening and closing shafts respectively disposed in the first housing and the second housing;

A fixed cam and a rotating cam inserted through the two opening / closing shafts;

A spring passed through the two opening and closing shafts,

The fixed cam and the rotating cam are in contact with each other on a contact cam surface, and a torque unit that generates sliding friction torque or click torque between the fixed cam and the rotating cam during an opening / closing operation in which the opening / closing shaft rotates is provided. There are two or more hinges on each end of the spring to form a hinge.

A two-shaft hinge device configured such that the hinge is integrated with the two open / close shafts as a single part, and the hinges are arranged in parallel in the longitudinal direction in two axes.

[3] In a two-axis hinge device having two opening / closing shafts arranged in parallel to connect the first housing and the second housing so as to be openable / closable,

Opening / closing operation in which the fixed cam and the rotating cam inserted through the opening / closing shaft are in contact with each other at the contact cam surface, and the opening / closing shaft rotates. A torque unit configured to generate sliding friction torque or click torque at times,

A protrusion provided on a lock block arranged to rotate in synchronization with the opening and closing shaft; 2 sets of 1-axis hinges having a rotation stopper portion for limiting the rotation angle of the open / close shaft by contact with a protrusion provided on a body stopper rotatably mounted on the closed shaft; The rotating cams arranged on the single-shaft hinges of the set are integrated into one joint component that is common to the two open / close shafts, so that the two single-shaft hinges are arranged in parallel. A two-axis hinge device characterized in that it is configured as follows.

[4] A biaxial hinge device for connecting the first housing and the second housing so as to be openable and closable,

A spring passed through the two opening and closing shafts;

A lock block having a protrusion and a body stopper having a protrusion, which are disposed on the opening and closing shaft,

The fixed cam and the rotating cam are in contact with each other on a contact cam surface, and a torque unit that generates sliding friction torque or click torque between the fixed cam and the rotating cam during an opening / closing operation in which the opening / closing shaft rotates is provided. Two or more locations are provided at both ends of the spring, the lock block rotates in synchronization with the opening / closing shaft, the body stopper is rotatably mounted on the opening / closing shaft, and the protrusion of the lock block and the body A rotation stopper part that restricts the rotation angle of the opening and closing shaft is arranged in contact with the protrusion of the stopper to constitute a hinge,

[5] A biaxial hinge device for opening and closing the first housing and the second housing,

A spring passed through the two opening and closing shafts,

Fixed cams are arranged on both surfaces of the rotating cam, and each of the both surfaces of the rotating cam and the respective fixed cams are in contact with each contact cam surface, and the opening and closing shaft rotates. The fixed cam and the rotating cam generate sliding friction torque or click torque. The generated torque unit is arranged to form a hinge,

[6] The biaxial hinge device according to claim 3 or 4, wherein the body stopper is assembled to the two opening / closing shafts as one part.

[7] The second casing or the first casing is 180 along the outer periphery of the hinge about the axis of one of the hinges installed in the first casing or the second casing as a rotation center. The first casing and the second casing are in a horizontal state when rotated, and the second casing or the first casing is rotatable up to about 360 °. The biaxial hinge device according to any one of claims 6 to 7.

[8] The biaxial hinge device according to [3] or [4], wherein the rotation stopper portion is formed on one of the two open / close shafts.

[9] The structure according to any one of claims 1 to 8, wherein the angle and the number of the uneven cam grooves formed on the contact cam surface of the fixed cam and the contact cam surface of the rotary cam are changed. The biaxial hinge device described in 1.

[10] The two-shaft hinge device according to any one of [1] to [9], wherein a plurality of different click torques are generated for each of the torque units as the opening / closing shaft rotates.

11. The biaxial hinge device according to any one of claims 1 to 8, wherein the contact cam surface between the fixed cam and the rotating cam is formed flat to generate only sliding friction torque. .

[12] A part of the opening / closing shaft is formed in a cross-sectional shape having a major axis and a minor axis, the fixed cam and the rotating cam are arranged in the part, and the opening / closing axis is movable in the axial direction of the opening / closing axis. The fixed cam installed to rotate in synchronization with the rotating cam installed rotatably on the opening and closing shaft is brought into pressure contact with the contact cam surface by the biasing force of the spring to generate a friction torque. 12. The biaxial hinge device according to any one of claims 1 to 11, configured as described above.

[13] The structure according to any one of claims 1 to 12, wherein the torque unit is housed in a hinge case having substantially the same internal shape as the outer shape of the rotating cam formed as one component. A biaxial hinge device according to any one of the above.

[14] The method according to any one of claims 1 to 13, wherein a joint portion with the first casing or the second casing is formed at both ends of each of the two opening and closing shafts. 2-axis hinge device.

[15] The fastening cam according to any one of claims 1 to 14, wherein the rotating cam formed as the one part is formed with a fastening hole for a fastening part that is fastened to the device housing or the hinge case. The biaxial hinge device described in 1.