JP2008128321A - Biaxial hinge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To hardly cause backlash in the rotation of a Y-direction hinge shaft orthogonal to an X-direction hinge shaft even in a simple structure easy to assemble with only one brake torque generating means. <P>SOLUTION: A worm wheel 3 is mounted to the X-direction hinge shaft 4, and a worm 7 meshed with the worm wheel 3 is mounted to the Y-direction hinge shaft 8. The Y-direction hinge shaft 8 is supported to a support member 5 rotated in conjunction with the X-direction hinge shaft 4, and a brake torque generating means is provided for generating brake torque to the X-direction hinge shaft 4 by the energizing force of a C-shaped torsion spring 10, while brake torque is generated to the Y-direction hinge shaft 8 through the mesh of the worm wheel 3 and worm 7 to form the simple structure easy to assemble with only one brake torque generating means, wherein backlash hardly occurs in the rotation of the Y-direction hinge shaft 8 orthogonal to the X-direction hinge shaft 4 by the mesh of the worm wheel 3 and worm 7 with less backlash. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a biaxial hinge having two orthogonal hinge axes.

  2. Description of the Related Art Some electronic information processing devices such as personal computers and mobile phones that open and close a lid with a display with a hinge shaft can open and close the opened lid with a rotating hinge shaft orthogonal to the opening and closing hinge shaft. In such a biaxial hinge having an open / close hinge shaft and a rotary hinge shaft that are orthogonal to each other provided in such an electronic information processing device, a brake torque generating means is provided on each of the open / close hinge shaft and the rotary hinge shaft, and an open / close lid is arbitrarily provided. There are some which can be stopped at any open / closed position and at any rotational position (see, for example, Patent Document 1). In the device described in Patent Document 1, coil springs are mounted on the open / close hinge shaft and the rotary hinge shaft, and a brake torque is generated on each hinge shaft by the biasing force of these coil springs.

  In the device described in Patent Document 1, since it is necessary to provide brake torque generating means on both the opening / closing hinge shaft and the rotary hinge shaft, the structure is complicated, and it is necessary to adjust the brake torque on each hinge shaft. Because there is, it takes time to assemble. In order to solve such a problem, the present inventor linked the X-direction hinge shaft (opening / closing hinge shaft) and the Y-direction hinge shaft (rotating hinge shaft) with each other by engaging the bevel gears, and the brake torque The biaxial hinge which provided the generation | occurrence | production means only in the X direction hinge axis | shaft, and also generate | occur | produced the brake torque also to the Y direction hinge axis | shaft via engagement of the bevel gear is proposed previously (refer patent document 2). .

JP 2002-155923 A JP 2006-46616 A

  The biaxial hinge described in Patent Document 2 can be configured to be simple and easy to assemble with only one brake torque generating means. However, the X direction hinge axis and the Y direction hinge axis orthogonal thereto are used. Since the bevel gears attached thereto are interlocked to each other, the rotation of the Y-direction hinge shaft not provided with the unique brake torque generating means is caused by the relatively large backlash of the meshing of the bevel gears. There are problems that arise. If such a Y-direction hinge axis is used as the rotation hinge axis of the display-equipped opening / closing lid, the opened opening / closing lid rattles from side to side.

  Accordingly, an object of the present invention is to make it difficult for the rotation of the Y-direction hinge axis perpendicular to the X-direction hinge axis to occur even with a simple and easy-to-assemble structure with only one brake torque generating means. is there.

  In order to solve the above problems, the present invention supports an X-direction hinge shaft and a Y-direction hinge shaft orthogonal to the X-direction hinge shaft so as to be independently rotatable, and generates brake torque on each of the hinge shafts. In the two-axis hinge, a worm wheel is provided on the X-direction hinge shaft, a worm that meshes with the worm wheel is provided on the Y-direction hinge shaft, and the Y-direction hinge shaft rotates in conjunction with the X-direction hinge shaft. Brake torque generating means for supporting the X-direction hinge shaft to generate brake torque is provided, and the Y-direction hinge shaft is connected to the worm wheel and the worm via the meshing of the worm wheel. The configuration that generates brake torque from

  That is, a worm wheel is provided on the X-direction hinge shaft, a worm that meshes with the worm wheel is provided on the Y-direction hinge shaft, and the Y-direction hinge shaft is supported by a support member that rotates in conjunction with the X-direction hinge shaft. Brake torque generating means for generating brake torque on the hinge shaft is provided, and the brake torque generating means is generated on the Y-direction hinge shaft by generating brake torque from the brake torque generating means through meshing of the worm wheel and the worm. Even if the structure is simple and easy to assemble, the rotation of the Y-direction hinge shaft perpendicular to the X-direction hinge shaft is less likely to occur due to the engagement between the worm wheel and the worm with a small backlash.

  By providing means for pressing the worm meshing with the worm wheel in one axial direction against the teeth of the worm wheel, the backlash of meshing between the worm wheel and the worm is eliminated, and the rotation of the Y-direction hinge shaft is reduced. It can be completely eliminated.

  Each of the two-axis hinges described above is configured so that the X-direction hinge shaft is an opening / closing hinge shaft that opens and closes the display-equipped opening / closing lid of the electronic information processing apparatus body, and the Y-direction hinge shaft rotates left and right when the opening / closing lid is opened. This is suitable for a rotating hinge shaft.

  The biaxial hinge of the present invention has a worm wheel on the X direction hinge shaft, a worm that meshes with the worm wheel on the Y direction hinge shaft, and a support member that rotates the Y direction hinge shaft in conjunction with the X direction hinge shaft. And a brake torque generating means for generating a brake torque on the X-direction hinge shaft. The brake torque generating means generates a brake torque on the Y-direction hinge shaft through meshing of the worm wheel and the worm. Therefore, even if the structure is simple and easy to assemble with only one brake torque generating means, the worm wheel and worm meshing with a small backlash can rotate the Y-direction hinge axis perpendicular to the X-direction hinge axis. It is possible to reduce the occurrence of rattling.

  By providing means for pressing the worm meshing with the worm wheel in one axial direction against the teeth of the worm wheel, backlash of meshing between the worm wheel and the worm is eliminated, and the backlash of the Y-direction hinge shaft is completely Can be eliminated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the biaxial hinge is rotatably supported by a pair of brackets 2 erected on the base 1, and an X direction hinge shaft 4 to which a worm wheel 3 is attached, and an X direction The X-direction hinge shaft 4 and the Y-direction hinge shaft are composed of a Y-direction hinge shaft 8 that is rotatably supported by a pair of arm portions 6 of a support member 5 that rotates in conjunction with the hinge shaft 4 and to which a worm 7 is attached. The worm wheel 3 and the worm 7 are meshed so that 8 is orthogonal. The support member 5 is divided in two in the axial direction, and one arm portion 6 is provided for each of the divided support members 5.

  A plurality of C-shaped torsion springs 10 serving as brake torque generating means are mounted on one end side of the X-direction hinge shaft 4 between the bracket 2 and the retaining ring 9. The X-direction hinge shaft 4 directly generates a brake torque by the urging force of the C-shaped torsion spring 10, and the Y-direction hinge shaft 8 is engaged with the worm wheel 3 and the worm 7 through meshing. Brake torque is generated indirectly from the brake torque generating means. The other end side of the X-direction hinge shaft 4 is prevented from coming off by directly abutting the retaining ring 9 against the bracket 2, and each C-shaped torsion spring 10 is provided with the tip on both sides on the upper surface of the base 1. It is inserted into the groove 1a and is prevented from rotating.

  The Y-direction hinge shaft 8 has a plurality of spring washers mounted between one arm portion 6 of the support member 5 and the retaining ring 11. The worm 7 is pressed against the teeth of the worm wheel 3 so as to eliminate the backlash caused by the engagement between the worm wheel 3 and the worm 7. As shown in FIG. 5 later, an opening / closing lid 22 of a personal computer is attached to the tip of the Y-direction hinge shaft 8 protruding from one arm portion 6.

  In the biaxial hinge described above, when the X-direction hinge shaft 4 is rotated, the Y-direction hinge shaft 8 does not rotate, but revolves around the X-direction hinge shaft 4 integrally with the support member 5. When the Y-direction hinge shaft 8 is rotated, the X-direction hinge shaft 4 is also rotated by the meshing of the worm 7 and the worm wheel 3, and the Y-direction hinge is rotated by the brake torque generating means for the rotation of the X-direction hinge shaft 4. Brake torque is indirectly generated on the shaft 8.

  The procedure for assembling the above-described biaxial hinge will be described below. First, as shown in FIG. 4A, a plurality of spring washers 12 are attached to one end side of the Y-direction hinge shaft 8 to which the worm 7 is attached, and the arm portion 6 of the one support member 5 thus divided. It passes through the bearing hole 6a provided in the. After that, as shown in FIG. 4B, the X-direction hinge in which the worm wheel 3 is attached to the shaft hole 5 a provided in one support member 5 and the other support member 5 through the Y-direction hinge shaft 8. As shown in FIG. 4C, the shaft 4 is inserted, and the other end of the Y-direction hinge shaft 8 is inserted into the bearing hole 6a provided in the arm portion 6 of the other support member 5, and the support member is divided. 5 are integrated together, the Y-direction hinge shaft 8 is prevented from coming off by a retaining ring 11, and the X-direction hinge shaft 4 and the Y-direction hinge shaft 8 are assembled to the support member 5.

  Next, as shown in FIG. 4 (d), the X-direction hinge shaft 4 assembled to the support member 5 is passed through the bearing holes 2 a provided in the pair of brackets 2 and passed through one bracket 2. A plurality of C-shaped torsion springs 10 and retaining rings 9 are attached to one end side of the directional hinge shaft 4, and a retaining ring 9 is attached to the other end side that is passed through the other bracket 2. Finally, as shown in FIG. 4 (e), each bracket 2 is attached to the base 1, and the tip of each C-shaped torsion spring 10 is inserted into the groove 1 a on the upper surface of the base 1.

  5A and 5B show a personal computer using the above-described biaxial hinge. The base 1 is attached to a device main body 21 of a personal computer, and an opening / closing lid 22 with a display 22a is attached to the tip of the Y-direction hinge shaft 8. As shown in FIG. 5 (a), by rotating the X-direction hinge shaft 4 as the opening / closing hinge shaft, the opening / closing lid 22 is stopped at an arbitrary opening / closing position, and as shown in FIG. 5 (b), the rotation hinge By rotating the Y-direction hinge shaft 8 as the shaft, the opened opening / closing lid 22 is stopped at an arbitrary rotation position.

  In the embodiment described above, the brake torque generating means is the urging force of the C-shaped torsion spring attached to the X direction hinge shaft, but the brake torque generating means is not limited to that of the embodiment, and the coil spring The brake torque may be generated by the biasing force of another form of spring or the like or the biasing force of an elastic body such as rubber.

  In the above-described embodiment, the Y-direction hinge shaft is urged in one axial direction by the spring washer, and the worm is pressed against the teeth of the worm wheel. The body can also be used to bias the Y-direction hinge axis in one direction.

Longitudinal sectional view showing an embodiment of a biaxial hinge Sectional view along the line II-II in FIG. External perspective view of FIG. The perspective view which shows the procedure of assembling the biaxial hinge of FIG. The perspective view which shows the procedure of assembling the biaxial hinge of FIG. The perspective view which shows the procedure of assembling the biaxial hinge of FIG. The perspective view which shows the procedure of assembling the biaxial hinge of FIG. The perspective view which shows the procedure of assembling the biaxial hinge of FIG. a and b are partially omitted side views showing a personal computer using the biaxial hinge of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 1a Groove 2 Bracket 2a Bearing hole 3 Worm wheel 4 X direction hinge shaft 5 Support member 5a Shaft hole 6 Arm part 6a Bearing hole 7 Worm 8 Y direction hinge shaft 9 Retaining ring 10 C type torsion spring 11 Retaining ring 12 Spring washer 21 Device body 22 Open / close lid 22a Display

Claims (3)

  An X-direction hinge shaft and a Y-direction hinge shaft orthogonal to the X-direction hinge shaft are rotatably supported, and a brake torque is generated on each of the hinge shafts. A worm wheel is provided, a worm that meshes with the worm wheel is provided on the Y-direction hinge shaft, the Y-direction hinge shaft is supported by a support member that rotates in conjunction with the X-direction hinge shaft, and the X-direction hinge shaft is Brake torque generating means for generating brake torque is provided, and brake torque is generated from the brake torque generating means on the Y-direction hinge shaft through meshing of the worm wheel and worm. Two-axis hinge to do.   The biaxial hinge according to claim 1, further comprising means for pressing the worm meshing with the worm wheel against the teeth of the worm wheel in one axial direction.   The X-direction hinge shaft is an opening / closing hinge shaft for opening / closing a display-equipped opening / closing lid of the electronic information processing apparatus main body, and the Y-direction hinge shaft is a rotating hinge shaft that rotates left and right when the opening / closing lid is opened. Item 3. The biaxial hinge according to item 1 or 2.

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