JP2002155926A - Small hinge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small hinge device allowing smooth automatic opening action from a predetermined opening angle and an automatic closing action from a predetermined closing angle. SOLUTION: This small hinge device has a cam mechanism 20 provided on mutually opposing faces of a sliding cam 13 and a fixed cam, a case body 17 with a rotatably attached detent restraining a rotation of the sliding cam to a shaft 5, a locking means 18 locking the case body so it does not come loose from the shaft, and an elastic means 19 wound around the shaft and elastically provided between the case body and the sliding cam for pressing the sliding cam toward a fixed cam 10 side. The cam mechanism is composed of a recessed part 8 and a projecting part 7 mutually fit by pressure contact, and each of the recessed part and projecting part has a flat part mutually pressed against the other's recessed part or projecting part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small mobile device having a first member and a second member which can be relatively opened and closed, and particularly to a small hinge device suitable for use in a portable telephone.

[0002]

2. Description of the Related Art Conventionally, as a small hinge device of a two-fold type portable telephone, which is capable of opening and closing a small mobile, especially a fixed housing (keyboard main body) and a movable housing (display body), is disclosed in Japanese Patent Application Laid-Open (JP-A) No. 2002-287802. As shown in JP-A-2000-17932, a shaft, a fixed cam integrally provided at one end of the shaft, and a sliding cam slidably and rotatably attached to the shaft in the axial direction. A cam mechanism provided on the surface of the sliding cam and the fixed cam facing each other; and a locking mechanism rotatably attached to the shaft for accommodating the sliding cam therein while restraining rotation inside. A case body, locking means for locking the case body so as not to come off from the shaft, and fixing the sliding cam to the fixed cam; In order to make pressure contact with the shaft, the shaft comprises an elastic means elastically provided between the case body and the sliding cam while being wound around the shaft, and the shape of the convex portion and the concave portion constituting the cam mechanism is the same as the fixed cam side. Small hinge devices that differ significantly from the sliding cam side are known.

[0003]

In the above-mentioned conventional small hinge device, the sliding cam is housed in a case having a receiving hole having a shape similar to the outer shape of the sliding cam. There was a problem that a large resistance was encountered when sliding in the direction, and smooth sliding was not possible.

Further, in the above-mentioned conventional small hinge device, since the shape of each convex portion and concave portion provided on the fixed cam and the sliding cam as the cam mechanism is different, opening and closing of the movable housing with respect to the fixed housing in a predetermined range. There is also a problem that a stable stop at an angle, an automatic opening operation from a predetermined opening angle, and an automatic closing operation (suction operation) from a predetermined closing angle cannot be performed at all, or only one or two operations can be performed. Was.

SUMMARY OF THE INVENTION An object of the present invention is to provide a small mobile device, particularly a small hinge device for a portable telephone, which has a simple structure with a small number of parts, facilitates smooth sliding of a sliding cam, and has good operability. .

A second object of the present invention is to provide a free stop at an intermediate opening / closing angle during a relative opening / closing operation of the fixed-side housing and the movable-side housing, an automatic opening operation from a predetermined opening angle, and a predetermined closing operation. It is an object of the present invention to provide a small hinge device capable of smoothly performing an automatic closing operation from a forming angle.

[0007]

In order to achieve the above-mentioned object, the present invention provides a shaft, a fixed cam integrally provided at one end of the shaft, and a shaft slidable with respect to the shaft. A sliding cam rotatably mounted, a cam mechanism provided on opposing surfaces of the sliding cam and the fixed cam, and a rotatably mounted while restricting rotation of the sliding cam with respect to the shaft. A case body with a rotation stopper, locking means for locking the case body so as not to come off from the shaft, and the ring while being wound around the shaft in order to press the sliding cam against the fixed cam. An elastic means elastically provided between the case body and the sliding cam, wherein the cam mechanism includes Parts are composed of, and having a flat portion for the respective concave and convex portions and one of the concave or convex portions each other pressure set.

The present invention also provides a shaft, a fixed cam locked at one end of the shaft so as not to come off in the axial direction by being restricted in rotation, and slidable in the axial direction with respect to the shaft, A sliding cam rotatably mounted, a cam mechanism provided on the facing surface between the sliding cam and the fixed cam, and a rotatable shaft while restricting rotation of the sliding cam with respect to the rotating shaft. A case body with a detent attached thereto, locking means for locking the case body so as not to come off from the rotary shaft, and return winding around the shaft to press the sliding cam against the fixed cam side. And an elastic means elastically provided between the case body and the sliding cam while the cam mechanism is press-fitted to each other. It is composed of parts and the convex portion, and having a flat portion for the respective concave and convex portions and one of the concave or convex portions each other pressure set.

In any of the above cases, according to the present invention, the means for slidably restraining the sliding cam with respect to the case body is provided so as to protrude in the axial direction of either the sliding cam or the case body. A key portion and a key groove for accommodating the key portion provided on either the sliding cam or the case body.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a portable telephone as a small mobile device using a small hinge device according to the present invention; FIG. FIG. 2 shows a plan view, wherein reference numeral 2 denotes a fixed-side housing (usually a keyboard body) as a first member, and reference numeral 3 denotes a movable-side housing (usually a display body) as a second member. . A pair of small hinge devices according to the present invention are used, and are mounted between the mounting portions 2a and 3a of the fixed housing 2 and the movable housing 3, respectively, and connect the two relatively to each other. .

In this specification, the first member is a fixed housing and the second member is a movable housing. However, as in a portable telephone, the fixed housing is held and fixed with one hand. , The case where the movable side housing is opened with the other hand,
The case where both are relatively opened and closed is naturally predicted.

The small hinge devices 4 and 4 according to the present invention, which are used as a pair in the portable telephone 1, have the same structure as shown in FIG. 2 in particular. 17 through FIG.

According to FIGS. 3 to 6, the reference numeral 5 indicates a shaft, and the shaft 5 has a shaft 6 and one end of the shaft 6, as shown in FIGS. On the side, a fixed cam 10 provided with a cam portion 9 comprising a pair of convex portions 7 and concave portions 8 projecting in the radial direction and provided at 180 ° intervals in the axial direction is provided, and the other end side of the shaft portion 6 is provided. Is provided with a locking flange portion 11 and a peripheral groove 12. Note that the outer periphery of the fixed cam 10 is provided with detent portions 10a. As shown in FIGS. 3 and 4, the fixed cam 10 having the rotation preventing portions 10a, 10a,... Is fitted in a deformable mounting hole 3b provided in the mounting portion 3a on the movable housing 3 side.

According to FIGS. 3 to 6 and FIGS. 10 to 13, the fixed cam 1 is inserted into the shaft 6 of the shaft 5 while the shaft 6 is inserted through an insertion hole 13a provided in the center of the shaft.
A sliding cam 13 having a cam portion 16 including a pair of convex portions 14 and concave portions 15 provided at 180 ° intervals in the axial direction on the side opposite to 0 is rotatable about the shaft portion 6 and slides in the axial direction. Mounted as possible. The cam portion 9 of the fixed cam 10 includes the convex portion 7 and the concave portion 8, and the cam portion 1 of the sliding cam 13 includes the convex portion 14 and the concave portion 15.
6 constitutes the cam mechanism 20.

The sliding cam 13 has an outer periphery 1.
Key portions 13b, 13b are protruded in the axial direction at positions separated from each other by 80 °, and the key portions 13b, 13b also have the same center as shown in FIGS. 3 to 6 and FIGS. 14 to 17. While the shaft 6 of the shaft 5 is inserted through the insertion hole 17a provided in the shaft portion, the key grooves 17b, 17b, which are provided at 180 ° intervals in the case body 17 rotatably attached to the shaft 6
17b. A locking ring 18 is fitted in the circumferential groove 12 of the shaft 5, and rotation preventing portions 17 c are provided on the outer periphery of the case body 17.
The case body 17 provided with the detent portions 17c, 17c...
As shown in FIGS. 3 and 4, is fitted into a deformation mounting hole 2b provided in the mounting portion 2a on the fixed housing 2 side. When the movable side housing is opened and closed, the movable side housing rotates.

As shown in FIGS. 3 to 6, between the sliding cam 13 and the case body 17, a compression spring 19 is resiliently wound around the outer periphery of the shaft portion 6 of the shaft 5, and the sliding cam 13 is elastically provided. 13 is constantly pressed against the fixed cam 10 side. The convex portions 7 and 14 and the concave portions 8 and 15 of the cam portions 9 and 16 are formed in mutually complementary shapes. In particular, as shown in FIGS. 7 and 9 and FIGS. 10 to 13, the tops 7a, 7a.14a, 14a and the bottoms 8a, 8a.15a, 15a are formed flat with each other. When the members 7a, 7a and 14a, 14a are pressed against each other, a stable friction torque is created. The cap indicated by reference numeral 21 is a cap attached to the locking flange 11 of the shaft 5.

Therefore, as shown in FIG. 1, when the fixed housing 2 and the movable housing 3 are closed in two, as shown in FIGS.
The concave portion 8 of 0 is formed on the convex portion 14 of the sliding cam 13.
The convex portions 7 of the fixed cam 10 fall into the concave portions 15 of the sliding cam 13, and the compression springs 19 press them against each other, so that the movable-side housing 3 is stably closed with respect to the fixed-side housing 2. I keep the state.

When the movable housing 3 is opened by holding the fixed housing 2 with one hand, the fixed cam 10 rotates together with the shaft 5 until the first opening angle of 20 ° as shown in FIG. When the convex portion 14 of the sliding cam 13 tries to escape from the concave portion 8 of the fixed cam 10 against the pressing force of the compression spring 19, and the convex portion 7 of the fixed cam 10 escapes from the concave portion 15 of the sliding cam 13, However, the movable housing 3 is opened.

As shown in FIG. 18, the movable housing 3 is
When opened to 0 °, the respective convex portions 7 and 14 of the fixed cam 10 and the sliding cam 13 escape from the respective concave portions 8 and 15, and the free stop area where the flat top portions 7a and 14a are pressed against each other. Therefore, a stable friction torque is generated, and the movable housing 3 can be opened and closed while being stopped at a free stop with respect to the fixed housing 2.

The movable housing 3 is 150
°, the convex portions 7 and 14 of the fixed cam 10 and the sliding cam 13 fall into the concave portions 8 and 15 again, and at this time, the compression spring 19 pressing the sliding cam 13 toward the fixed cam 10 side. Due to the pressing force, the movable housing 3 has the convex portions 7 and 14
Automatically opens up to 170 °, which falls completely into 5.

The movable housing 3 opened to 170 ° is further opened to 180 ° and stopped there by stopper means (not shown). When the movable housing 3 is closed, the protruding portions 7 and 14 of the fixed cam 10 and the sliding cam 13 encounter resistance at 170 ° when they escape from the recesses 8 and 15, but are closed to 150 °. Fig. 6
As shown in (1), each of the convex portions 7 and the convex portions 14 is a free stop region where the convex portions 7 and 14 are pressed against each other. When it is closed to 20 °, each convex part 7 and 14 falls again into each concave part 8 and 15, and the compression spring 19
The movable housing 3 is automatically closed with respect to the fixed housing 2 by the pressing force pressing the movable housing 3 toward the fixed cam 10.
5 to the state shown in FIG.

FIG. 19 shows another embodiment of the small hinge device according to the present invention. A case body 22 having the same function as the case body 17 shown in the previous embodiment is integrally provided on one end side of the shaft 21 constituting the small hinge device 30 according to this embodiment. Case body 22
Is provided with a detent part 22a on the outer periphery thereof. The fixed cam 23 having the same function as the fixed cam 10 shown in the previous embodiment is separated and independent from the shaft 21, and then has a deformed through hole 23a having a substantially rectangular cross section and provided in the axial direction of the center.
A deformed shaft portion 2 having a rectangular cross section provided on the shaft 21
1b is inserted and engaged, and is locked by a locking ring 25 fitted into the circumferential groove 24 so as not to come off the shaft 21. Note that a detent 23b is provided on the outer periphery of the fixed cam 23.

Between the fixed cam 23 and the case body 22,
The circular cam 21a of the shaft 21 is rotatably inserted into an insertion hole 26a provided at the center thereof, and the sliding cam 26 is arranged so as to be slidable in the axial direction and rotatable around the axis of the shaft 21. A compression spring 27 is elastically provided between the sliding cam 26 and the case body 22 so as to return the outer circumference of the shaft 21 to press the sliding cam 26 against the fixed cam 23. Note that the locking flange of the indication symbol 21c, the cap of the indication symbol 28, and the cam mechanism 29 are the same as those of the previous embodiment.

In addition, convex portions 23c and 26b and concave portions 23d provided on the fixed cam 23 side and the sliding cam 26 side, respectively.
The shape and arrangement of 26c, the key portion 26d of the sliding cam 26, the key groove 22b on the case body 22 side, and the like are the same as those in the previous embodiment. Even if implemented in this way,
The object of the present invention can be achieved. In this embodiment, the case body 22 may be formed integrally with the shaft 21 and the cap 28, or
1 is not formed integrally with the shaft 1, but is formed as a separate body, a through hole is formed in the axial direction of the center portion, the other end side of the shaft 21 is inserted, and the locking ring is locked in a circumferential groove provided in the shaft 21. May be configured so as not to come off in the axial direction of the shaft. In this case, the cap 28 is the same as that shown in the previous embodiment and FIG.

In each of the above embodiments, the tops of the convex portions provided on the fixed cams and the sliding cams are not both flat, but only one may be flat and the other may have a mountain shape. Will.

[0026]

The present invention is configured as described above.
The following effects can be obtained.

According to the first aspect of the present invention, a shaft integrally provided with a fixed cam having a detent, a sliding cam rotatably mounted on the shaft and slidable in the axial direction, and the sliding cam A cam mechanism provided on the facing surface of the cam and the fixed cam; a case body with a rotation stop that is locked on the opposite side of the shaft from the fixed cam; and a spring between the case body and the sliding cam. The fixed and movable housings that are relatively open and closed can be stably stopped in a free stop from a predetermined opening and closing angle with a simple configuration with few components called compression springs. It is possible to provide a small hinge device which can be automatically opened and has a function of automatically closing from a predetermined closing angle. It can provide an advantage that can be provided at low cost as the type of opening and closing the hinge of the portable phone.

According to the second aspect of the present invention, the fixed cam is not integral with the shaft, but the configuration is partially different by integrating the case body with the shaft, but the number of parts is the same as that of the first aspect. The same effect as that of the first aspect can be obtained.

According to the third aspect, the same effects as those of the first and second aspects can be obtained.
With a simple configuration, the sliding cam can be restrained by the case body and can be rotated integrally, so that the sliding cam can be smoothly slid in the axial direction.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating the operation of a portable telephone incorporating a small hinge device according to the present invention.

FIG. 2 is a plan view of the small hinge device according to the present invention when the movable housing is opened with respect to the fixed housing.

FIG. 3 is an enlarged partial cross-sectional plan view of a portion of the small hinge device according to the present invention in the state shown in FIG. 2;

FIG. 4 is a partial cross-sectional front view of the state of FIG. 3 as viewed from the front.

FIG. 5 is a partial sectional view of the small hinge device in the state of FIG. 4;

FIG. 6 is an explanatory diagram for explaining the operation of the small hinge device according to the present invention.

FIG. 7 is a front view of a shaft.

FIG. 8 is a plan view of a shaft.

FIG. 9 is a right side view of the shaft.

FIG. 10 is a front view of a sliding cam.

FIG. 11 is a plan view of a sliding cam.

FIG. 12 is a left side view of the sliding cam.

FIG. 13 is a plan sectional view of a sliding cam.

FIG. 14 is a front view of the case.

FIG. 15 is a plan view of a case.

FIG. 16 is a left side view of the case.

FIG. 17 is a plan sectional view of a case.

FIG. 18 is a torque characteristic diagram of the small hinge device according to the present invention.

FIG. 19 is an exploded view for explaining another embodiment of the small hinge device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Portable telephone 2 Fixed side housing 3 Movable side housing 4, 30 Small hinge device 5, 21 Shaft 6 Shaft part 7, 23c Convex part 7a Top part 8, 23d Concave part 8a Bottom part 9 Cam part 10, 23 Fixed cam 10a, 23b Detent part 12 Peripheral groove 13, 26 Sliding cam 13a Insertion hole 13b, 26d Key part 14, 26b Convex part 14a Top part 15, 26c Concave part 15a Bottom part 16 Cam part 17, 22 Case body 17a Insertion hole 17b, 22b Key groove 17c , 22a Non-rotating part 18 Lock ring 19, 27 Compression spring 20, 29 Cam mechanism 24 Circumferential groove 25 Lock ring

Claims (3)

[Claims] 1. A shaft, a fixed cam integrally provided at one end of the shaft, a sliding cam slidably and rotatably mounted on the shaft in an axial direction, and the sliding cam and the sliding cam. A cam mechanism provided on a surface facing each other with the fixed cam, a case body with a detent that is rotatably mounted while restricting rotation of the sliding cam with respect to the shaft, and this case body is separated from the shaft by the shaft. Locking means for locking so as not to come off; and elastic means elastically provided between the case body and the sliding cam while being wound around the shaft in order to press the sliding cam against the fixed cam. The cam mechanism is constituted by a concave portion and a convex portion which are press-fitted to each other, and each of the concave portion and the convex portion is one of the concave portions. Alternatively, a small hinge device having a flat portion for press-fitting with a convex portion. 2. A shaft, a fixed cam locked at one end of the shaft so as not to come off in the axial direction by being restricted in rotation, and slidably and rotatable in the axial direction with respect to the shaft. The mounted sliding cam, a cam mechanism provided on a surface facing each other between the sliding cam and the fixed cam, and a rotatably mounted while restricting rotation of the sliding cam with respect to the rotating shaft. A case body with a detent, a locking means for locking the case body so as not to come off from the rotary shaft, and the return cam being wound around the shaft in order to press the sliding cam against the fixed cam side. An elastic means elastically provided between the case body and the sliding cam, wherein the cam mechanism comprises a concave portion and a convex portion which are press-fitted to each other. The small hinge device is characterized in that each of the concave portions and the convex portions has a flat portion press-fitted with one of the concave portions or the convex portions. 3. The sliding cam or the case body includes means for slidably restraining the sliding cam with respect to the case body. 3. The small hinge device according to claim 1, wherein the small hinge device is a groove portion that accommodates the key portion provided on one of the other sides of the case body. 4.