JP4998076B2 - Switchgear - Google Patents

Description

  The present invention relates to an opening / closing device used in various electronic devices such as a mobile phone and a personal computer.

  In recent years, as electronic devices such as mobile phones and personal computers have become smaller and lighter, so-called foldable types in which a movable housing is attached to a fixed housing so that it can be opened and closed are increasing. The opening / closing device used is also required to be able to perform a reliable and satisfactory opening / closing operation.

  Such a conventional switchgear will be described with reference to FIGS.

  In these drawings, the cross-sectional views are enlarged in the radial direction to facilitate understanding of the relationship between the fixed cam and the movable cam.

  FIG. 5 is a cross-sectional view of a conventional switchgear, and FIG. 6 is an exploded perspective view. In FIG. 5, 1 is a substantially cylindrical fixing body having a pair of fixing portions 1A formed on the left end surface. It is formed by being wound and fitted with end portions, and on the outer periphery of the right end surface, a pair of protrusions 2A and two inclined portions 2B and 2C extending up and down from the protrusions 2A. An uneven fixed cam 2 is provided.

  Reference numeral 3 denotes a substantially ring-shaped metal movable body, which is disposed so as to be rotatable in the opening / closing direction and movable in the axial direction with respect to the fixed body 1, and a pair of pin-shaped movable cams 4 are movable bodies. 3 is formed so as to face the inner periphery.

  Reference numeral 5 denotes a substantially cylindrical and metal movable case, and 6 denotes a coiled and steel wire spring. The fixed body 1 and the movable body 3 are accommodated in the movable case 5, and the right end surface of the movable body 3. The spring 6 is mounted in a slightly bent state between the inner surface of the movable case 5 and the movable body 3 is urged to the left by the spring 6 so that the movable cam 4 moves toward the inclined portion 2B of the fixed cam 2. It is in elastic contact.

  Further, the movable case 5 is provided with a pair of grooves 5A protruding outward, and the outer periphery of the movable body 3 is provided with a pair of protrusions 3A protruding outward, and the protrusions 3A are inserted into the grooves 5A. Thus, the movable body 3 is movable in the axial direction with respect to the movable case 5 and is integrally rotated in the rotational direction.

  Further, 7 is a substantially cylindrical fixed shaft, 8 is a fixed cover having a flat portion 8A formed on the left end surface, and the fixed shaft 7 left end and the fixed portion 1A of the fixed body 1 are fixed to the fixed cover 8, The right end portion of the fixed shaft 7 is inserted through the center of the movable body 3 and the spring 6 and is rotatably mounted on the outer surface of the movable case 5 by a retaining ring 9 to constitute an opening / closing device 10.

  Then, the opening / closing device 10 configured as described above is, for example, as shown in the perspective view of the mobile phone in FIG. To the fixed housing 11 where the audio input unit 11B is formed, the outer periphery of the groove 5A of the movable case 5 is moved to the movable case 12 where the display unit 12A such as a liquid crystal display element and the audio output unit 12B such as a speaker are formed on the surface. Each of them is fixed, and the movable housing 12 is pivotally supported by the opening / closing device 10 so as to be openable / closable with respect to the fixed housing 11 to constitute an electronic device.

  In the above configuration, when the movable cam 4 is in elastic contact with the inclined portion 2B below the fixed cam 2, the movable body 3 is urged downward by the spring 6 so that the movable case 5 is attached. The movable casing 12 thus held is held in a closed state with respect to the fixed casing 11.

  When the movable housing 12 is opened by hand from this closed state, the movable case 5 having the guide groove 5A attached and fixed to the movable housing 12 rotates, and the movable body 3 moves in the movable case 5 along the right axis. When the movable cam 4 elastically contacts the upper inclined portion 2C beyond the protruding portion 2A of the fixed cam 2 by moving while rotating in the direction, the movable body 3 is biased in the opening direction. A force in the opening direction is applied to the movable casing 12, and the movable casing 12 opens at a predetermined angle with respect to the fixed casing 11.

  That is, by rotating the movable case 5 attached to the movable housing 12, the movable body 3 biased by the spring 6 is moved in the axial direction, and the movable cam 4 is moved to the inclined portion 2B or 2C of the fixed cam 2. The movable casing 12 is opened and closed with respect to the fixed casing 11 by being elastically contacted with any one of them.

  In the opening / closing device 10 as described above, since a force in the outer peripheral direction is generally applied to the pair of fixed cams 2 by the movable cam 4 biased by the spring 6, as shown in FIG. If the thickness of the fixed body 1 is made too thin, the fixed cam 2 is bent or deformed, or the fixed body 1 is opened and cracked.

  Therefore, in order to perform a reliable and stable opening / closing operation, the fixed body 1 cannot be formed in a very thin shape, and thus there is a limit to reducing the size and weight of the entire opening / closing device.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2007-32661 A

  However, in the conventional switchgear described above, the thickness of the fixed body 1 cannot be made very thin in order to prevent the bending of the fixed cam 2 and the opening of the fixed body 1. There was a problem that it was difficult to make it easier.

  The present invention solves such a conventional problem, and an object of the present invention is to provide an opening / closing device that can be reduced in size and weight and can be reliably operated.

In order to achieve the above object, the present invention provides an inclined portion at the base of a movable cam projecting in a pin shape on a substantially ring-shaped movable body circumference where the concave and convex fixed cam elastically contacts , and the movable cam inclined portion is fixed. The opening / closing device is configured so that the movable body rotates relative to the fixed body by moving while the elastic part of the cam is in elastic contact, and the fixed cam is elastically contacted with the inclined part, and the force in the outer peripheral direction applied to the fixed cam is applied. Since it can be mitigated, it is possible to prevent the bending of the fixed cam, the opening of the fixed body, etc., and to achieve a switchgear that can be reduced in size and weight and can be reliably operated.

  As described above, according to the present invention, it is possible to achieve an advantageous effect that it is possible to realize a switchgear that can be reduced in size and weight and can be reliably operated.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In these drawings, the cross-sectional views are enlarged in the radial direction to facilitate understanding of the relationship between the fixed cam and the movable cam.

  Further, the same reference numerals are given to the same components as those described in the background art section, and the detailed description will be simplified.

(Embodiment)
1 is a sectional view of a switchgear according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a perspective view of the main part thereof, and in FIG. Is formed by winding a metal plate such as steel or copper alloy and fitting an end thereof, and on the outer periphery of the right end surface, there is a protrusion 2A and this protrusion. A pair of concave and convex fixed cams 2 formed from two inclined portions 2B and 2C extending vertically from 2A are provided.

  Reference numeral 13 denotes a substantially ring-shaped movable body made of metal such as steel, copper alloy, or sintered alloy, which is disposed so as to be rotatable in the opening / closing direction and movable in the axial direction with respect to the fixed body 1. The pin-shaped movable cam 14 is formed so as to face the inner periphery of the movable body 13, and an inclined portion 14 </ b> A is provided at the root of the movable cam 14.

  Reference numeral 5 denotes a substantially cylindrical and metal movable case, and 6 denotes a coiled and steel wire spring. The fixed body 1 and the movable body 13 are housed in the movable case 5, and the right end surface of the movable body 13. The spring 6 is mounted in a slightly bent state between the inner surface of the movable case 5 and the movable body 13 is urged to the left by the spring 6 so that the inclined portion 14A at the base of the movable cam 14 is fixed to the fixed cam 2. It is in elastic contact with the inclined portion 2B.

  Further, the movable case 5 is provided with a pair of grooves 5A protruding outward, and the outer periphery of the movable body 13 is provided with a pair of protrusions 13A protruding outward, and the protrusions 13A are inserted into the grooves 5A. Thus, the movable body 13 is movable in the axial direction with respect to the movable case 5 and is integrally rotated in the rotational direction.

  Further, 7 is a substantially cylindrical fixed shaft, 8 is a fixed cover having a flat portion 8A formed on the left end surface, and the fixed shaft 7 left end and the fixed portion 1A of the fixed body 1 are fixed to the fixed cover 8, The right end portion of the fixed shaft 7 is inserted through the center of the movable body 13 and the spring 6, and is rotatably attached to the outer surface of the movable case 5 by a retaining ring 9 to constitute an opening / closing device 20.

  The opening / closing device 20 configured as described above is, for example, as shown in the perspective view of the mobile phone in FIG. To the fixed housing 11 where the audio input unit 11B is formed, the outer periphery of the groove 5A of the movable case 5 is moved to the movable case 12 where the display unit 12A such as a liquid crystal display element and the audio output unit 12B such as a speaker are formed on the surface. Each of them is fixed, and the movable casing 12 is pivotally supported by the opening / closing device 20 so as to be openable / closable with respect to the fixed casing 11 to constitute an electronic device.

  In the above configuration, when the movable cam 14 is in elastic contact with the inclined portion 2B on the lower side of the fixed cam 2, the movable body 13 is urged downward by the spring 6 so that the movable case 5 is attached. The movable casing 12 thus held is held in a closed state with respect to the fixed casing 11.

  When the movable housing 12 is opened by hand from this closed state, the movable case 5 having the guide groove 5A attached and fixed to the movable housing 12 rotates, and the movable body 13 moves in the movable case 5 along the right axis. When the movable cam 14 moves while rotating in the direction and elastically contacts the upper inclined portion 2C beyond the protruding portion 2A of the fixed cam 2, the movable body 13 is biased in the opening direction. A force in the opening direction is applied to the movable casing 12, and the movable casing 12 opens at a predetermined angle with respect to the fixed casing 11.

  That is, by rotating the movable case 5 attached to the movable housing 12, the movable body 13 biased by the spring 6 is moved in the axial direction, and the movable cam 14 is moved to the inclined portion 2B or 2C of the fixed cam 2. The movable casing 12 is opened and closed with respect to the fixed casing 11 by being elastically contacted with any one of them.

  Further, during the opening / closing operation as described above, a force in the outer circumferential direction is generally applied to the pair of fixed cams 2 by the movable cam 14 biased by the spring 6. An inclined portion 14A is formed at the base, and the force in the outer peripheral direction on the fixed cam 2 is relieved by the elastic contact of the fixed cam 2 with the inclined portion 14A.

  That is, the fixed cam 2 is elastically contacted with the inclined portion 14A at the base of the movable cam 14, and the force in the outer peripheral direction applied to the fixed cam 2 is relaxed to prevent the fixed cam 2 from being bent or the fixed body 1 from being opened. Thus, it is possible to perform a reliable opening / closing operation, and it is possible to reduce the thickness and weight of the entire opening / closing device 20 by reducing the thickness or reducing the shape of the fixed body 1. Yes.

  The inclined portion 14A at the base of the movable cam 14 may be formed in an arc-shaped so-called round shape, but a linear so-called chamfered shape as described above is a force in the outer peripheral direction of the fixed cam 2. In addition, it is more preferable to make the fixed cam 2 elastically contact the outer peripheral side than the inner peripheral side of the inclined portion 14A.

As described above, according to the present embodiment, the inclined cam 14A is provided at the base of the movable cam 14 projecting like a pin on the inner periphery of the substantially ring-shaped movable body 13 where the concave and convex fixed cam 2 comes into elastic contact. The movable body 13 rotates relative to the fixed body 1 by moving the 14 inclined parts 14A while elastically contacting the inclined parts 2B and 2C of the fixed cam 2, and the force in the outer peripheral direction applied to the fixed cam 2 can be relieved. It is possible to prevent the bending of the fixed cam 2 and the opening of the fixed body 1 and the like, and to achieve an opening / closing device that can be reduced in size and weight and can be reliably operated.

  In the above description, the configuration in which the movable casing 12 is manually opened and closed and the movable case 5 fixed to the movable casing 12 is rotated has been described. However, the push-button or the elastic contact position of the movable cam 14 with respect to the fixed cam 2 is described. The present invention is also applicable to a so-called one-push open structure opening / closing device that includes a reversing cam or the like for reversing and automatically opens the movable housing 12 by a pressing operation of a push button from a closed state in addition to a manual opening / closing operation. Can be implemented.

  The switchgear according to the present invention can be reduced in size and weight and can be reliably operated, and is useful as a switchgear used in various electronic devices.

Sectional drawing of the switchgear by one embodiment of this invention Exploded perspective view Perspective view of the main part Perspective view of mobile phone Cross-sectional view of a conventional switchgear Exploded perspective view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed body 1A Fixed part 2 Fixed cam 2A Protrusion part 2B, 2C Inclination part 5 Movable case 5A Groove part 6 Spring 7 Fixed shaft 8 Fixed cover 8A Flat part 9 Retaining ring 11 Fixed housing 11A Operation part 11B Audio | voice input part 12 Movable housing Body 12A Display section 12B Audio output section 13 Movable body 13A Convex section 14 Movable cam 14A Inclined section 20 Opening / closing device

Claims (1)

A substantially cylindrical fixed body provided with a concave and convex fixed cam on the end surface, and a substantially ring-shaped member provided rotatably with respect to the fixed body and provided with a movable cam protruding in a pin shape on the inner periphery. A movable body and a spring that elastically contacts the movable cam to the fixed cam. The fixed cam is provided with an inclined portion that elastically contacts the movable cam, and an inclined portion is formed at the base of the movable cam that elastically contacts the fixed cam. An opening / closing device in which the movable body rotates relative to the fixed body by moving the inclined portion of the fixed cam while the inclined portion of the movable cam is elastically contacted .

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