JP4998066B2 - 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 casing is attached to a fixed casing 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.

  Of these drawings, cross-sectional views and the like are shown by enlarging the radial direction so that the relationship between the fixed cam and the movable cam can be easily understood.

  FIG. 7 is a sectional view of a conventional switchgear, and FIG. 8 is an exploded perspective view. In FIG. 7, reference numeral 1 denotes a substantially cylindrical metal fixing body having a fixing portion 1A formed on the left end surface. A pair of fixed cams 2 formed from a projecting portion 2A and two inclined portions 2B, 2C extending vertically from the projecting portion 2A are provided on the outer periphery of the surface.

  Reference numeral 3 denotes a substantially cylindrical metal movable body which is arranged to be rotatable in the opening / closing direction and movable in the axial direction with respect to the fixed body 1 and is a left end which is a surface facing the fixed cam 2. A pair of movable cams 4 are provided on the outer periphery of the surface.

  Reference numeral 5 denotes a substantially cylindrical metal case. The fixed portion 1A of the fixed body 1 protrudes rotatably from the opening at the left end, and the guide groove 5A protruding to the outer periphery has a protrusion on the outer periphery of the movable body 3. The part 3A is inserted, and the movable body 3 is accommodated in the case 5 so as to be movable in the axial direction.

  Further, reference numeral 6 denotes a coiled spring, which is mounted between the right end surface of the movable body 3 and the inner surface of the case 5 in a slightly bent state, and the movable body 3 is urged leftward by the spring 6. The tip of the movable cam 4 is in elastic contact with the inclined portion 2B of the fixed cam 2.

  Reference numeral 7 denotes a substantially cylindrical fixed shaft. The fixed body 1 is fixed to the left end portion of the fixed shaft 7, and the right end portion of the fixed shaft 7 is inserted through the hollow portion of the movable body 3 and the spring 6 to be stopped. An opening / closing device 10 is configured by a ring 8 rotatably mounted on the outer surface of the case 5.

  The opening / closing device 10 configured as described above is, for example, as shown in the perspective view of the mobile phone in FIG. 6, such as an operation unit 11 </ b> A having a plurality of keys on the upper surface of the fixing unit 1 </ b> A and a microphone. To the fixed housing 11 in which the sound input portion 11B is formed, the outer periphery of the guide groove portion 5A of the case 5 is directed to the movable housing 12 in which the display portion 12A such as a liquid crystal display element and the sound output portion 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, as shown in the partial plan views of FIG. 7 and FIG. 9A, the movable body 3 has the spring 6 in a state where the tip of the movable cam 4 is in elastic contact with the inclined portion 2B below the fixed cam 2. Therefore, the movable casing 12 to which the case 5 is attached is held in a closed state with respect to the fixed casing 11.

  When the movable casing 12 is manually opened from this closed state, the case 5 having the guide groove 5A attached and fixed to the movable casing 12 rotates, and the movable body 3 moves in the case 5 in the right axial direction. As shown in FIG. 9B, the tip of the movable cam 4 exceeds the protruding portion 2A of the fixed cam 2 and elastically contacts the upper inclined portion 2C as shown in FIG. 9C. Then, since the movable body 3 is biased in the opening direction, a force in the opening direction is applied to the movable casing 12 by this force, and the movable casing 12 is opened at a predetermined angle with respect to the fixed casing 11. .

  That is, by rotating the case 5 attached to the movable casing 12, the movable body 3 biased by the spring 6 is moved in the axial direction, and the tip of 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 and closing device 10 as described above, the movable body 3 can move in the axial direction between the protrusion 3A on the outer periphery of the movable body 3 and the guide groove 5A of the case 5 in which the movable body 3 is inserted. In a state where a slight gap is provided and the tip of the movable cam 4 is in elastic contact with the inclined portion 2B on the lower side of the fixed cam 2, as shown in FIG. Since it is urged downward in the closing direction, the lower end of the outer protrusion 3A is in elastic contact with the lower end of the guide groove 5A, and a gap is left between the upper end of the protrusion 3A and the upper end of the guide groove 5A.

  Then, the case 5 rotates, and the movable body 3 moves while rotating in the right direction in the axial direction of the case 5, so that the tip of the movable cam 4 is the protruding portion of the fixed cam 2 as shown in FIG. This state continues until it comes into elastic contact with 2A, but as shown in FIG. 9C, when the tip of the movable cam 4 exceeds the protruding portion 2A and comes into elastic contact with the inclined portion 2C above the fixed cam 2, Since the movable body 3 is urged upward in the opening direction by the spring 6, the upper end of the protrusion 3A is in elastic contact with the upper end of the guide groove 5A.

  Also, when the movable housing 12 is closed, contrary to the above, immediately after the tip of the movable cam 4 exceeds the protruding portion 2A of the fixed cam 2, the lower end of the protruding portion 3A elastically contacts the lower end of the guide groove portion 5A. As a result, a collision sound is generated.

  That is, when the movable housing 12 is opened and closed, the biasing direction of the movable body 3 by the spring 6 is reversed immediately after the tip of the movable cam 4 exceeds the protruding portion 2A of the fixed cam 2 during the opening / closing operation. The projection 3A collides with the guide groove 5A, and a collision sound is generated.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2004-328661 A

  However, in the above conventional opening / closing device, when the movable casing 12 is opened / closed, the protruding portion 3A becomes the guide groove portion 5A immediately after the tip of the movable cam 4 exceeds the protruding portion 2A of the fixed cam 2 during the opening / closing operation. Since a collision sound is generated due to a collision, particularly when the movable body 3 and the case 5 are made of metal, there is a problem that the collision sound is reflected by the movable housing 12 and a large abnormal noise is generated. there were.

  The present invention solves such a conventional problem, and an object of the present invention is to provide an opening / closing device that can reduce the sound during the opening / closing operation and can perform a good operation.

In order to achieve the above object, according to the present invention, a protrusion on the outer periphery of the movable body is inserted into the case, a guide groove is provided to hold the movable body so as to be movable in the axial direction, and the guide groove extends inward of the groove. Before and after the movable cam is elastically contacted with the protruding portion, the protrusion of the movable body abuts the inclined surface of the bent portion, and the protrusion is attached within the guide groove by the spring. The opening / closing device is configured so that the direction of the biased surface is reversed , and the end of the protrusion of the movable body guides the front and back of the movable cam before and after the leading end of the movable cam elastically contacts the protruding portion of the fixed cam. Since it touches the bent part of the groove part and is guided by this bent part, the projecting part comes into contact with the guide groove part, so that the collision noise between the projecting part and the guide groove part can be prevented, and the sound can be reduced during opening / closing operation. Has the effect of being able to obtain a switchgear that can be operated It is intended.

  As described above, according to the present invention, it is possible to achieve an advantageous effect that it is possible to realize an opening / closing device that can be reduced in sound and can be operated satisfactorily.

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

  Of these drawings, cross-sectional views and the like are shown by enlarging the radial direction so that the relationship between the fixed cam and the movable cam can be easily understood.

  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)
FIG. 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. In FIG. A fixed body such as an alloy, a sintered alloy, or a synthetic resin, and a pair of protrusions 2A formed on the outer periphery of the right end surface and two inclined portions 2B and 2C extending vertically from the protrusion 2A. The fixed cam 2 is provided.

  Reference numeral 13 denotes a substantially cylindrical movable body such as steel, copper alloy, sintered alloy, or synthetic resin, 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. A pair of movable cams 14 are provided on the outer periphery of the left end surface, which is a surface facing the fixed cam 2.

  Reference numeral 15 denotes a substantially cylindrical case made of steel, copper alloy, sintered alloy, synthetic resin or the like, and a fixed portion 1A of the fixed body 1 protrudes rotatably from the opening at the left end, and a pair protruding to the outer periphery. A pair of protrusions 13A on the outer periphery of the movable body 13 is inserted into the guide groove 15A, and the movable body 13 is accommodated in the case 15 so as to be movable in the axial direction.

  Further, in the guide groove portion 15A of the case 15, as shown in the perspective view of the main part of FIG. 3, the upper and lower ends of the guide groove portion 15A are bent, and a pair of bent portions 15B extending inward of the groove, A through-hole portion 15C is formed above and below, and an inclined portion 13B is provided on the upper and lower surfaces of the right end of the protruding portion 13A of the movable body 13.

  6 is a coil-like spring made of copper or steel wire, and is mounted between the right end surface of the movable body 13 and the inner surface of the case 15 with the spring 6 slightly bent. The movable cam 14 is biased to the left, and the tip of the movable cam 14 is in elastic contact with the inclined portion 2B of the fixed cam 2.

  Reference numeral 7 denotes a substantially cylindrical fixed shaft made of steel, copper alloy, sintered alloy, synthetic resin or the like. The fixed body 1 is fixed to the left end of the fixed shaft 7 and the right end of the fixed shaft 7 is An opening / closing device 20 is configured by inserting the hollow portion of the movable body 13 and the spring 6 and rotatably mounting the outer surface of the case 15 by a retaining ring 8.

  The opening / closing device 20 configured in this manner is, for example, as shown in the perspective view of the mobile phone in FIG. 6, such as an operation unit 11 </ b> A having a plurality of keys on the upper surface of the fixing unit 1 </ b> A or a microphone. The outer periphery of the guide groove 15A of the case 15 is moved to the fixed housing 11 where the sound input portion 11B is formed, and the movable housing 12 where the display portion 12A such as a liquid crystal display element and the sound output portion 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, as shown in the partial plan views of FIG. 1 and FIG. 4A, in the state where the tip of 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 spring 6. Therefore, the movable casing 12 to which the case 15 is attached is held in a closed state with respect to the fixed casing 11.

  When the movable casing 12 is opened by hand from this closed state, the case 15 with the guide groove portion 15A attached and fixed to the movable casing 12 rotates, and the movable body 13 moves in the case 15 in the right axial direction. As shown in FIG. 4 (b), the tip of the movable cam 14 exceeds the protruding portion 2A of the fixed cam 2 and elastically contacts the upper inclined portion 2C as shown in FIG. 4 (c). Then, since the movable body 13 is biased in the opening direction, a force in the opening direction is applied to the movable casing 12 by this force, and the movable casing 12 is opened at a predetermined angle with respect to the fixed casing 11. .

  That is, by rotating the case 15 attached to the movable housing 12, the movable body 13 biased by the spring 6 is moved in the axial direction, and the tip of 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.

  In the opening and closing device 20 as described above, the movable body 13 can move in the axial direction between the protrusion 13A on the outer periphery of the movable body 13 and the guide groove 15A of the case 15 into which the movable body 13 is inserted. In a state where a slight gap is provided and the tip of 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 moved by the spring 6 as shown in FIG. Since it is biased in the downward closing direction, the lower end of the outer protrusion 13A is in elastic contact with the lower end of the guide groove 15A, and there is a gap between the upper end of the protrusion 13A and the upper end of the guide groove 15A.

  When the case 15 rotates upward from this state, as shown in FIG. 4B, the movable body 13 moves in the case 15 while rotating in the right axial direction. After moving in the right direction, the lower end of the inclined portion 13B at the right end of the protruding portion 13A comes into contact with the inclined surface of the lower bent portion 15B extending inward of the guide groove portion 15A, and the inclined surface of the bent portion 15B While being guided, it rotates toward the center of the guide groove 15A.

  When the tip of the movable cam 14 is in elastic contact with the protruding portion 2A of the fixed cam 2, the upper and lower ends of the right end of the protrusion 13A abut against the inclined surface of the upper and lower bent portions 15B, and the tip of the movable cam 14 is the protruding portion. Immediately after exceeding 2A, the upper end of the right end of the protruding portion 13A comes into contact with the inclined surface of the upper bent portion 15B, rotates upward while being guided by the bent portion 15B, and then shown in FIG. As described above, the tip of the movable cam 14 is in elastic contact with the inclined portion 2C on the upper side of the fixed cam 2, and the upper end of the projection 13A is in elastic contact with the upper end of the guide groove 15A.

  Also, when closing the movable housing 12, contrary to the above, the upper end of the right end of the protrusion 13A rotates downward while being in contact with and guided by the inclined surface of the upper bent portion 15B, and the tip of the movable cam 14 is moved. After exceeding the protruding portion 2A, the movable body 13 is rotated and moved while the lower end of the right end of the protruding portion 13A is in contact with and guided by the lower bent portion 15B.

  That is, when the movable casing 12 is opened / closed, the protrusion of the movable cam 14 before and after the leading end of the movable cam 14 exceeds the protruding portion 2A of the fixed cam 2 and the urging direction of the movable body 13 is reversed by the spring 6. The upper and lower ends of the right end of 13A are in contact with the inclined surfaces of the bent portions 15B above and below the guide groove portion 15A, and the upper and lower ends of the protruding portion 13A are in contact with the upper and lower ends of the guide groove portion 15A by being guided by the bent portions 15B. It is configured.

  That is, immediately after the tip of the movable cam 14 exceeds the protruding portion 2A of the fixed cam 2 and an upward or downward biasing force is applied to the movable body 13, the right end of the protruding portion 13A abuts against the inclined surface of the bent portion 15B. Since the movable body 13 is rotated and moved by being guided by the bent portion 15B, the impact when the upper and lower ends of the projecting portion 13A abut on the upper and lower ends of the guide groove portion 15A is buffered, and no collision sound is generated. It is like that.

  Further, as shown in FIG. 3, a through-hole portion 15C is provided above and below the bent portion 15B, and the bent portion 15B is formed so as to be somewhat elastically deformable in the vertical direction. When the right end of the portion 13A comes into contact with the inclined surface of the bent portion 15B, the bent portion 15B is bent, so that the shock can be further buffered and the sound can be reduced.

As described above, according to the present embodiment, the protrusion 13A on the outer periphery of the movable body 13 is inserted into the case 15, and the guide groove 15A that holds the movable body 13 so as to be movable in the axial direction is provided. A bent portion 15B having an inclined surface extending inward of the groove is formed, and before and after the movable cam 14 is brought into elastic contact with the protruding portion 2A, the protruding portion 13A of the movable body 13 contacts the inclined surface of the bent portion 15B. By forming a bent portion 15B so that the direction of the surface where the projection 13A is urged in the guide groove portion 15A by the spring 6 is reversed by the contact with the spring 6, the distal end of the movable cam 14 protrudes from the fixed cam 2 during the opening / closing operation. Before and after the elastic contact with the portion 2A, the end of the protrusion 13A of the movable body 13 abuts on the bent portion 15B of the guide groove 15A, and is guided by the bent portion 15B so that the protrusion 13A contacts the guide groove 15A. Touch Therefore, to prevent collision noise of the protrusion 13A and the guide groove portion 15A, Hakare small sound of opening and closing operations, it is those which can be obtained capable of good operation switchgear.

  In the above description, the configuration in which the outer periphery of the guide groove 15A of the case 15 into which the protrusion 13A of the movable body 13 is inserted is described in the movable housing 12, but as shown in the perspective view of FIG. A protrusion 17A for mounting the movable housing 12 is provided on the outer periphery of the case 17, and a notch-shaped guide groove 17B is provided at a different location, and the upper and lower ends of the guide groove 17B are bent to enter the groove inward. The present invention can also be implemented with a configuration in which a pair of extending bent portions 17C and through-hole portions 17D are formed.

  The switchgear according to the present invention can be reduced in sound and can be operated well, 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 Partial plan view Perspective view according to another embodiment Perspective view of mobile phone Cross-sectional view of a conventional switchgear Exploded perspective view Partial plan view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed body 1A Fixed part 2 Fixed cam 2A Protrusion part 2B, 2C Inclination part 6 Spring 7 Fixed shaft 8 Retaining ring 11 Fixed housing | casing 11A Operation part 11B Audio | voice input part 12 Movable case 12A Display part 12B Audio | voice output part 13 Movable body 13A Protruding part 13B Inclined part 14 Movable cam 15, 17 Case 15A, 17B Guide groove part 15B, 17C Bent part 15C, 17D Through hole part 17A Protruding part 20 Opening and closing device

Claims (1)

A fixed body provided with a fixed cam having a projecting portion on an end surface, a movable body arranged rotatably with respect to the fixed body, and provided with a movable cam on a surface facing the fixed cam, and the movable cam And a substantially cylindrical case that houses them, and a protrusion on the outer periphery of the movable body is inserted into the case so that the movable body can move in the axial direction. The guide groove portion is formed in the guide groove portion, and a bent portion having an inclined surface extending inward of the groove is formed in the guide groove portion. An opening / closing device according to claim 1, wherein the projection is in contact with the inclined surface of the bent portion and the direction of the surface on which the projection is urged in the guide groove by the spring is reversed .

Images