JP3655498B2 - Tilt hinge for office automation equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tilt hinge for OA equipment for opening and closing a display body of OA equipment such as a personal computer and a word processor.
[0002]
[Prior art]
An example of a conventional tilt hinge for office automation equipment will be described with reference to FIG. The rotating shaft 30 has a bearing portion 30b having a small diameter formed on one side of the large diameter portion 30a, and a display body mounting portion 30c formed on the other side of the large diameter portion 30a. A rotation friction plate 31, an apparatus main body mounting plate 32, rotation friction plates 33, 34, a spring washer 35, and a spacer 36 are inserted into the bearing portion 30b sequentially from the large diameter portion 30a, and the end of the bearing portion 30b is caulked. The rotary friction plates 31 and 33 are pressed against both sides of the main body mounting plate 32. The display body mounting portion 30 c is fixed to the display body 21 via the holding plate 20, and the apparatus main body mounting plate 32 is fixed to the apparatus main body 22.
[0003]
Examples of this type of tilt hinge for office automation equipment include Japanese Utility Model Laid-Open No. 5-21079, Japanese Utility Model Laid-Open No. 5-21080, Japanese Patent Application Laid-Open No. 7-324552, Japanese Patent Application Laid-Open No. 10-280781, and the like.
[0004]
[Problems to be solved by the invention]
In the above prior art, the bearing portion 30b has a round shape, and the rotary friction plates 31, 33, and 34 have round holes. For this reason, when the rotating shaft 30 is rotated, the rotating friction plates 31 and 33 may not rotate together with the rotating shaft 30, and a predetermined torque cannot be obtained between the apparatus main body mounting plate 32 and the rotating friction plates 31 and 33. There was a problem.
[0005]
As a solution to this problem, a groove or flat surface is provided in the bearing portion 30b, and a protrusion engaging with the groove or a flat surface corresponding to the flat surface is provided in the hole of the rotating friction plates 31, 33, 34, and the rotation is performed. There is provided a rotating friction plate 31, 33, 34 that rotates with the shaft 30. However, in this structure, since a groove or a flat surface is provided in the bearing portion 30b, the bearing portion 30b cannot be reduced in strength and is increased in size. Further, when the size is reduced, there is a problem that the contact area between the apparatus main body mounting plate 32 and the rotating friction plates 31 and 33 is reduced, and high torque cannot be obtained.
[0006]
An object of the present invention is to provide a tilt hinge for office automation equipment which is small and can obtain high torque.
[0007]
[Means for Solving the Problems]
Hand stage of the present invention to solve the above problems, has a bearing portion of the small-diameter end of the large diameter portion, and a rotary shaft which also serves as a supporting portion of the display body, rotatably bearing portion of the rotating shaft An apparatus main body mounting plate that is supported and fixed to the apparatus main body, and a rotating friction plate that is inserted into the bearing portion so as to be in pressure contact with both sides of the apparatus main body mounting plate and holds the rotating shaft at an arbitrary position by surface friction In the tilt hinge for office automation equipment, the bearing portion of the rotary shaft has a hexagonal shape, and the rotary friction plate is a hexagonal hole having the same shape as the bearing portion so as to rotate together with the bearing portion. On one opposing surface of the device main body mounting plate and the rotating friction plate disposed on both sides of the device main body mounting plate, a corrugated oil groove for holding oil is provided from the inner peripheral portion to the outer peripheral portion, Peripheral part Characterized in that it is formed continuously toward the inner periphery.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the rotary shaft 1 has a bearing portion 1b having a small diameter formed on one side of the large diameter portion 1a and a display body mounting portion 1c formed on the other side of the large diameter portion 1a. doing. A rotation friction plate 2, an apparatus main body mounting plate 3, a rotation friction plate 4, a fixed friction plate 5, a rotation friction plate 6, a spring washer 7 and a spacer 8 are inserted into the bearing portion 1b sequentially from the large diameter portion 1a. The rotating friction plates 2 and 4 are pressed against both sides of the apparatus main body mounting plate 3 by crimping the end portion 1b. The display body mounting portion 1 c is fixed to the display body 21 via the holding plate 20, and the apparatus main body mounting plate 3 is fixed to the apparatus main body 22.
[0010]
The bearing portion 1b has a nine-sided shape as shown in FIG. The rotating friction plates 2, 4, 6 have the same hexagonal holes as the bearing portion 1b so as to rotate together with the bearing portion 1b. The apparatus main body mounting plate 3 and the fixed friction plate 5 are formed with round holes that rotatably support the bearing portion 1b. Further, an engagement hole 3 a is formed in the apparatus main body mounting plate 3, and an engagement protrusion 5 a formed on the fixed friction plate 5 is engaged with the engagement hole 3 a.
[0011]
Thereby, the rotating shaft 1 can be rotated only when a predetermined rotational torque is applied, and the display body 21 can be stopped at an arbitrary position. As shown in FIG. 3, corrugated oil grooves 3 b are continuously formed on both surfaces of the apparatus main body mounting plate 3 from the inner periphery to the outer periphery, and from the outer periphery to the inner periphery.
[0012]
As described above, the bearing portion 1b has a hexagonal shape, and the rotating friction plates 2, 4, and 6 that rotate together with the bearing portion 1b are also nine-sided holes. Thus, the following effects can be obtained. The bearing portion 1b can have a small diameter, and the contact area of the rotating friction plates 2 and 4 that are in contact with the apparatus main body mounting plate 3 and the fixed friction plate 5 is increased, so that high torque can be obtained. Furthermore, the contact between the nine-sided shape of the bearing portion 1b and the nine-sided holes of the rotary friction plates 2, 4, 6 is a combination of three triangular shapes and three triangular holes, so that the rotary shaft 1 is stabilized. Can be rotated.
[0013]
When the rotating shaft 1 and the rotating friction plates 2, 4, 6 are rotated by opening and closing the display body 21, the oil in the oil groove 3b of the apparatus main body mounting plate 3 moves along the oil groove 3b. That is, the oil moves from the inner peripheral portion of the apparatus main body mounting plate 3 to the outer peripheral portion and from the outer peripheral portion to the inner peripheral portion. For this reason, since oil is supplied while moving substantially corresponding to the entire surface of the rotating friction plates 2 and 4, the friction between the apparatus main body mounting plate 3 and the rotating friction plates 2 and 4 is reduced, and durability is increased. Will improve.
[0014]
FIG. 4 shows another embodiment of the present invention. In the embodiment, only the rotating friction plate 2 is provided between the large-diameter portion 1 a and the apparatus main body mounting plate 3. In the present embodiment, a fixed friction plate 10 is provided between the large-diameter portion 1 a and the apparatus main body mounting plate 3, and rotating friction plates 11 and 12 are provided on both sides of the fixed friction plate 10. The other configuration is the same as that of the above embodiment. Similarly to the fixed friction plate 5, the fixed friction plate 10 is formed with a round hole for rotatably supporting the bearing portion 1b, and an engagement protrusion 10a formed on the fixed friction plate 10 is formed in the engagement hole 3a of the apparatus body mounting plate 3. Is engaged. The rotary friction plates 11, 12 are nine-sided holes like the rotary friction plates 2, 4, 6.
[0015]
As described above, when the fixed friction plate 10 and the rotary friction plates 11 and 12 are provided, the effect can be obtained as in the above-described embodiment, and the torque can be further improved.
[0016]
In each of the above embodiments, the case where the oil groove 3b is provided in the apparatus main body mounting plate 3 has been described. However, the oil groove 3b is not provided in the apparatus main body mounting plate 3, and the rotational friction plates 2, 4 An oil groove having the same shape as the oil groove 3 b may be provided on the surface facing the apparatus main body mounting plate 3. Moreover, although the case where the edge part of the bearing part 1b and the display body attaching part 1c was crimped was demonstrated, a thread part may be provided in the edge part of the bearing part 1b and the display body attaching part 1c, and a nut may be fastened to this thread part. Needless to say.
[0017]
【The invention's effect】
In the present invention, the bearing portion of the rotating shaft has a hexagonal shape, and the rotating friction plate is a nine-sided hole having the same shape as the bearing portion so as to rotate together with the bearing portion. It is done.
Also, on one opposing surface of the apparatus main body mounting plate and the rotating friction plate disposed on both sides of the apparatus main body mounting plate, a corrugated oil groove for holding oil is formed from the inner periphery to the outer periphery, The oil in the oil groove moves from the inner peripheral portion of the apparatus main body mounting plate to the outer peripheral portion and from the outer peripheral portion to the inner peripheral portion. For this reason, the oil is supplied while moving substantially corresponding to the entire surface of the rotating friction plate, the friction between the apparatus main body mounting plate and the rotating friction plate is reduced, and the durability is improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a tilt hinge for office automation equipment according to the present invention.
FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG.
3A and 3B show an apparatus main body mounting plate, where FIG. 3A is an enlarged front view and FIG. 3B is an enlarged cross-sectional view.
FIG. 4 is a cross-sectional view showing another embodiment of a tilt hinge for office automation equipment according to the present invention.
FIG. 5 is a cross-sectional view showing a conventional tilt hinge for OA equipment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotating shaft 1a Large diameter part 1b Bearing part 1c Display body attaching part 2 Rotating friction plate 3 Apparatus main body attaching plate 3b Oil groove 4 Rotating friction plate 5 Fixed friction plate 6 Rotating friction plate 10 Fixed friction plates 11, 12 Rotating friction plate 21 Display body 22 Device body

Claims (1)

A rotating shaft that has a small-diameter bearing at the end of the large-diameter portion and also serves as a support for the display body, and a device body mounting plate that rotatably supports the bearing portion of the rotating shaft and is fixed to the device body In the tilt hinge for OA equipment, comprising at least a rotary friction plate inserted into the bearing portion so as to be pressed against both sides of the apparatus main body mounting plate and holding the rotary shaft at an arbitrary position by surface friction. The bearing portion is a nine-sided shape, and the rotating friction plate is a nine-sided hole having the same shape as the bearing portion so as to rotate together with the bearing portion, and the device body mounting plate and the device body mounting plate A corrugated oil groove for retaining oil is continuously formed on one opposing surface of the rotating friction plate disposed on both sides from the inner peripheral portion to the outer peripheral portion and from the outer peripheral portion to the inner peripheral portion. to have this Tilt hinge for OA equipment characterized by.

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