JPH0645110U - Hinge mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] It is not necessary to interpose grease between friction plates,
Therefore, the assembly work can be done easily in a short time, and the dirt due to grease can be eliminated,
Also, to provide a hinge mechanism capable of improving repeated durability of a friction sliding portion. A first base member 12, a shaft 14 fixed to the first base member 12, a second base member 16 rotatably fitted to the shaft, and an outer fit to the shaft 16. The fixed first friction plate 18 and the shaft 1 so as to be pressed against the side surface of the first friction plate 18.
A second friction plate 20 rotatably fitted to the outer peripheral surface of the second base member 16 so as to rotate integrally with the second base member 16; and the first friction plate 18 and the second friction plate. It is made possible to rotate relative to the first base member 12 by a side frictional force with respect to 20, and at least one of the first friction plate 18 and the second friction plate 20 itself has an appropriate surface friction. It is made of sintered oil-impregnated metal or resin that has strength.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is used, for example, in a portable word processor, an electronic notebook, a liquid crystal television receiver, etc. The present invention relates to a hinge mechanism that can be stopped at an inclined angle position.

[0002]

[Prior art]

 Conventionally, as a hinge mechanism of this type, for example, a first base member (fixed base member) attached to a fixed portion such as a main body, a shaft fixed to the first base member, and a shaft A second base member (movable base member) rotatably fitted to the outside and attached to a movable portion such as a liquid crystal display unit, a first friction plate fitted and fixed to the shaft, and a first friction plate. A second friction plate rotatably fitted to the shaft so as to be in contact with the side surface of the friction plate and adapted to rotate integrally with the second base member; The first friction plate and the second friction plate are pressed by a spring or the like in a direction in which the first friction plate and the second friction plate are in contact with each other while a grease having an appropriate lubricity such as molybdenum grease is interposed between the plate and the second friction plate. The first friction plate and the second friction plate by The second base member is allowed to rotate relative to the first base member by the frictional force between the plates and the grease interposed therebetween, and the second base member is stopped at an arbitrary tilt angle position. There are things that have been done. In such a hinge mechanism, a steel plate such as SUS is usually used as a friction plate.

[0003]

[Problems to be solved by the device]

 However, the conventional hinge mechanism as described above requires the steps of applying grease to the friction plate and wiping it off, which requires a lot of time and labor for assembly work, is easily soiled by grease, and has a repeated durability of friction sliding parts. There were problems such as not necessarily being good.

In view of the above points, the present invention does not require the interposition of grease between the friction plates, so that the assembling work can be easily performed in a short time, and the dirt due to the grease can be eliminated. An object of the present invention is to provide a hinge mechanism capable of improving the repeated durability of a friction sliding portion.

[0005]

[Means for Solving the Problems]

 To achieve the above object, a hinge mechanism according to the present invention comprises a first base member, a shaft fixed to the first base member, and a second base rotatably fitted on the shaft. A member, a first friction plate externally fitted and fixed to the shaft, and a second base member rotatably externally fitted to the shaft so as to come into pressure contact with a side surface of the first friction plate; A second friction plate adapted to rotate integrally, wherein the second friction plate is rotatable relative to the first base member by a side frictional force between the first friction plate and the second friction plate. At least one of the first friction plate and the second friction plate is made of a sintered oil-impregnated metal or resin having an appropriate surface friction force by itself.

In the above structure, as the sintered oil-impregnated metal, pure iron, Fe—Cu alloy, Fe—C alloy, Fe—C—Cu alloy or the like can be used, and the resin is tephron or the like. Can be used.

[0007]

[Action]

 In the hinge mechanism according to the present invention configured as described above, at least one of the first friction plate and the second friction plate has a sintered oil-impregnated metal or resin which itself has an appropriate surface friction force. Since an appropriate frictional force is obtained without interposing grease between them, the second base member can rotate relative to the first base member, and It is designed so that it can be stopped at the tilt angle position.

[0008] Therefore, since it is not necessary to interpose grease between the friction plates, the assembling work can be easily performed in a short time, the dirt due to the grease can be eliminated, and the friction sliding portion can be eliminated. Repeat durability is improved.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of a hinge mechanism according to the present invention. The hinge mechanism 10 of this embodiment is connected, for example, so that the liquid crystal display section (movable section) can be relatively rotated with respect to the main body section (fixed section) of a portable word processor and can be stopped at an arbitrary tilt angle position. The left side portion of the left and right hinge portions provided for this purpose is configured.

That is, the hinge mechanism 10 includes a first base member 12 having an L-shaped cross section, in which a hole 12a for inserting a screw or the like for attaching to a fixed portion such as a main body is formed, and the first base member. The stepped shaft 14 fixed to the stepped shaft 12, the second base member 16 rotatably fitted on the stepped shaft 14 and attached to a movable part such as a liquid crystal display, and the stepped shaft 14 are formed. Of five disc-shaped ring-shaped movable friction plates (not shown) in which locking projections 18a that fit into the key grooves 14a having a rectangular cross section are provided so as to project inward and are externally fitted and fixed to the stepped shaft 14. The first friction plate 18 and the movable friction plate 18 are rotatably fitted to the stepped shaft 14 so as to be in contact with the side surface of the movable friction plate 18 and integrated with the second base member 16. To rotate A fixed friction plate (second friction plate) 20 which is

More specifically, the stepped shaft 14 is composed of a large diameter portion 14A and a small diameter portion 14B, and the second base member 16 is a plate-shaped base portion having a hole 17 formed through the small diameter portion 14B. 16A, two mounting plate portions 16B and 16C that are bent at right angles from both sides of the hole 17 in the plate-shaped base portion 16A, and from the upper side of the plate-shaped base portion 16A in parallel with the mounting plate portion 16B. The fixed friction plate 20 includes a protruding plate portion 16D that holds down a rotation restricting piece portion 20a (described later), and the mounting plate portions 16B and 16C are inserted with screws or the like for attaching to a movable portion such as a liquid crystal display portion. The fixed friction plate 20 is bridged and locked by the mounting plate portions 16B and 16C so that the relative friction between the fixed friction plate 20 and the second base member 16 is restricted. A rectangular rotation restricting piece portion 20a is provided.

The end of the large-diameter portion 14A of the stepped shaft 14 is integrally fixed to the first base member 12, and the first base member 12 is smaller than the second base member 16 of the small-diameter portion 14B. A plate-shaped ring-shaped fixed washer 22 having an L-shaped engaging piece 22a of a cut surface that is engaged with the movable friction plate 18 and the plate-shaped base portion 16A is externally fitted to the side, and the stepped shaft 14 is provided. A fixed washer 22 having the same structure as the above is externally fitted to the open end side of the second base member 16 of the small diameter portion 14B in the opposite direction, and the movable friction plate 18 ( (4 sheets) and fixed friction plates 20 (3 sheets) are arranged so as to be in direct contact with each other alternately and fitted on the outside, and further two disc springs 24 are fitted on the outside of them so as to face each other and the rearmost portion. Bites into the small diameter portion 14B A push nut 26 having a comb-teeth-shaped disc spring portion 26a for preventing slippage is press-fitted, and due to the elasticity of the disc spring 24 and the push nut 26, the side surfaces of the members 16, 18, 20, 22 are large. The end face 14b of the diameter portion 14A and the push nut 26 are in pressure contact with each other.

Here, in this embodiment, the second base member 16 is rotatable relative to the first base member 12 by the side frictional force between the movable friction plate 18 and the fixed friction plate 20. In addition, the movable friction plate 18 itself has a suitable surface friction force so that the second base member 16 can be stopped at an arbitrary tilt angle position, for example, a sintered oil-impregnated metal such as Fe-C-Cu. Manufactured from alloys.

Therefore, in the hinge mechanism 10 of the present embodiment configured as described above, the movable friction plate 18 and the fixed friction plate 20 are in direct contact with each other, and no grease is interposed between them. An appropriate frictional force is obtained to allow the second base member 16 to rotate relative to the first base member 12, and, for example, within the rotation angle range shown by the chain double-dashed line in FIG. It can be stopped at any tilt angle position.

As a result, since it is not necessary to interpose grease between the friction plates 18-20, the assembling work can be easily performed in a short time, and the dirt due to the grease can be eliminated, and the friction can be reduced. Repeated durability of sliding parts is improved.

In the above example, only the movable friction plate 18 is made of sintered oil-impregnated metal, but only the fixed friction plate 20 or both of them may be made of sintered oil-impregnated metal. Instead of the sintered oil-impregnated metal, it is also possible to use a resin such as Teflon which has an appropriate surface friction force by itself.

[0017]

[Effect of device]

 As can be understood from the above description, in the hinge mechanism according to the present invention, since the friction plate is made of a sintered oil-impregnated metal or a resin such as Teflon which has an appropriate surface friction force by itself, the first friction mechanism is used. An appropriate frictional force can be obtained without interposing grease between the plate and the second friction plate, the second base member can be relatively rotated with respect to the first base member, and the inclination angle position is arbitrary. Can be stopped at. Therefore, since it is not necessary to interpose grease between the friction plates, the assembling work can be performed easily in a short time, the dirt due to the grease can be eliminated, and the repeated durability of the friction sliding portion can be eliminated. The excellent effect that the property is improved can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a hinge mechanism according to the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a side view of the embodiment.

[Explanation of symbols]

 10 Hinge Mechanism 12 First Base Member 14 Stepped Shaft 16 Second Base Member 18 Movable Friction Plate 20 Fixed Friction Plate 22 Fixed Washer 24 Disc Spring 26 Push Nut

Claims (2)

[Scope of utility model registration request] 1. A first base member, a shaft fixed to the first base member, a second base member rotatably fitted onto the shaft, and an outer fit fixed to the shaft. A first friction plate and a second friction plate externally rotatably fitted to the shaft so as to come into pressure contact with a side surface of the first friction plate so as to rotate integrally with the second base member.
And a second friction plate, wherein the second base member is rotatable relative to the first base member by a side frictional force between the first friction plate and the second friction plate. A hinge mechanism characterized in that at least one of the first friction plate and the second friction plate is made of a sintered oil-impregnated metal having an appropriate surface friction force by itself. 2. A first base member, a shaft fixed to the first base member, a second base member rotatably fitted to the shaft, and an outer fit fixed to the shaft. A first friction plate and a second friction plate externally rotatably fitted to the shaft so as to come into pressure contact with a side surface of the first friction plate so as to rotate integrally with the second base member.
And a second friction plate, wherein the second base member is rotatable relative to the first base member by a side frictional force between the first friction plate and the second friction plate. A hinge mechanism, wherein at least one of the first friction plate and the second friction plate is made of a resin having a proper surface friction force by itself.