JP2006292061A - Opening and closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening and closing device used in various electronics, smoothly and surely performing opening and closing operations. <P>SOLUTION: A pair of four fixed cams 13A-13D and movable cams 15A-15D and 16A-16D opposite to each other are mounted near an inner side and another pair of them in the direction orthogonal to the pair is mounted near an outer side respectively on different radiuses from a center of rotation, thus the fixed cam and the movable cam are not engaged with each other until a closed state or an opened state is achieved in the opening and closing operation, and the smooth and sure opening and closing operations are performed without catchy feeling. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

  In recent years, as electronic devices such as mobile phones and video cameras have become smaller and more advanced, more and more movable casings are mounted on the fixed casing so that they can be opened and closed. There is also a demand for an opening / closing device that can be opened and closed reliably and is easy to use.

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

  FIG. 4 is an exploded perspective view of a conventional switchgear. In FIG. 4, 1 is a substantially plate-like fixing body, 2 is a substantially disk-shaped moderation plate, and a substantially oval through-hole 1A is provided at the left end of the fixing body 1. And four convex fixed cams 2B are provided on the same radius from the center of the through hole 2A at intervals of 90 degrees on the lower surface of the outer periphery of the substantially oval through hole 2A of the moderation plate 2. .

  That is, these four fixed cams are formed on the same radius at positions of 0, 90, 180, and 270 degrees with respect to the longitudinal direction of the fixed body 1.

  Reference numeral 3 denotes a substantially plate-like movable body. A circular through hole 3A is formed at the right end, and the outer peripheral surface of the through hole 3A is movable at intervals of 90 degrees on the same radius from the center of the through hole 3A. Four concave movable cams 4A at positions of 0, 90, 180, and 270 degrees with respect to the longitudinal direction of the body 3, and 20 degrees apart from the movable cam 4A at equal intervals, that is, with respect to the longitudinal direction of the movable body 3, Four concave movable cams 4B are provided at positions of 110, 200, and 290 degrees.

  Further, 5 is a spring made of a thin metal plate having a substantially ring shape, and is mounted in a slightly bent state between the lower surface of the fixed body 1 and the moderation plate 2, and the moderation plate 2 is urged downward by the spring 5, The fixed cam 2B on the lower surface of the moderation plate 2 and the movable cams 4A and 4B on the upper surface of the movable body 3 are in elastic contact.

  Furthermore, 6 is a metal-made hollow cylindrical fixed shaft, and the cylindrical portion 6A passes through the through hole 1A of the fixed body 1 and the spring 5, the through hole 2A of the moderation plate 2, and the through hole 3A of the movable body 3. A head 6B having an outer diameter larger than that of the cylindrical portion 6A is formed at the lower end, and the head 6B is in contact with the lower surface of the movable body 3.

  Then, the upper end of the cylindrical portion 6A of the fixed shaft 6 protruding from the upper surface of the fixed body 1 is engaged with the movable cams 4A and 4B, so that a gap in which the moderation plate 2 can move up and down is provided, and a substantially conical punch (not shown). Or the like, and the parts are engaged by the fixed shaft 6 to constitute an opening / closing device.

  Since the flat portion 6C is formed on both side surfaces of the cylindrical portion 6A of the fixed shaft 6, the movable body 3 having a circular through hole 3A through which the cylindrical portion 6A is inserted is rotatable relative to the fixed shaft 6. The fixed body 1 and the moderation plate 2 whose through holes 1A and 2A are substantially oval are locked so as not to rotate, that is, the movable body 3 is fixed to the fixed body 1 and the fixed shaft 6 via the fixed shaft 6. The moderation plate 2 is rotatably engaged.

  In addition, the opening / closing device configured in this way has, for example, the movable body 3 as a display screen on a fixed housing of a device in which the fixed body 1 is provided with a plurality of operation units, microphones, and the like such as a mobile phone and a video camera. In addition, the electronic device is configured such that the movable casing is fixed to a movable casing provided with a speaker, a camera, and the like, and the movable casing can be opened and closed with respect to the fixed casing by the opening / closing device.

  In the above configuration, as shown in the cross-sectional view of the main part in FIG. 5A, in a state where the movable body 3 overlaps the fixed body 1 in parallel, that is, in a state where the movable housing is closed with respect to the fixed housing. Four convex fixed cams 2B provided at intervals of 90 degrees on the same radius from the center on the outer periphery of the through hole 2A of the moderation plate 2 biased by the spring 5 are arranged on the outer periphery of the through hole 3A of the movable body 3. The movable housing is held in a closed state by meshing with four concave movable cams 4A formed on the same radius at intervals of 90 degrees.

  Further, when the movable housing is opened by hand from this closed state, the movable body 3 fixed to the movable housing rotates counterclockwise, and each movable cam 4A comes off from the fixed cam 2B. Along with the rotation, the fixed cam 2B elastically slides on the upper surface of the movable body 3 on the outer periphery of the through hole 3A.

  For example, as shown in FIG. 5 (d), when the movable body 3 is rotated counterclockwise to 160 degrees, the outer periphery of the through hole 3A has the same radius as the movable cam 4A and is separated from the movable cam 4A by 20 degrees. The four concave movable cams 4B formed at intervals are engaged with the four convex fixed cams 2B, respectively, and the movable casing is held in a state of being opened 160 degrees with respect to the fixed casing.

  That is, for example, the movable cam 4B at 20 degrees in FIG. 5A is fixed to the fixed cam 2B at 180 degrees, and the movable cam 4B at 200 degrees is at 0 degrees. Each meshes with the fixed cam 2B.

  However, as described above, the four fixed cams 2B and the four movable cams 4A and 4B meshing with each other are formed at equal intervals on the same radius with respect to the rotation center, so that the movable housing is shown in FIG. 5B until the open state of FIG. 5B, for example, the movable cam 4B, which was at 20 degrees in FIG. 5A, meshes with the fixed cam 2B at 90 degrees, The movable body 3 stops once at a rotation angle of 70 degrees.

  Further, after 20 degrees after that, as shown in FIG. 5C, for example, the movable cam 4A, which was at the 0 degree position in FIG. 5A, is engaged with the fixed cam 2B at the 90 degree position. However, the movable body 3 temporarily stops even at a rotation angle of 90 degrees.

  That is, while the movable housing is opened from the 0 degree closed state to the 160 degree open state, when the movable body 3 is opened by 70 degrees and 90 degrees, the four fixed cams 2B and four Since the movable cams 4A and 4B mesh with each other, a moderation feeling is generated here, and the opening / closing operation is not performed smoothly, and a catching feeling is generated.

  The number of the fixed cam 2B and the movable cams 4A and 4B is reduced. For example, the fixed cam 2B and the movable cam 4A are two at 0 degrees and 180 degrees, and the movable cam 4B is at two positions 20 and 200 degrees. If each cam is provided, the above-mentioned feeling of catching can be prevented. However, if each cam is provided in two, the biasing force of the spring 5 to the moderation plate 2 provided with the fixed cam 2B on the lower surface is uneven. It will be a thing.

  That is, while the movable body 3 is rotating, the moderation plate 2 is inclined while the fixed cam 2B and the movable cams 4A and 4B are disengaged, whereby the movable body 3 with which the fixed cam 2B is elastically contacted is also inclined. As a result, the opening / closing operation becomes unstable. Therefore, when the fixed body 1 and the movable body 3 are configured in a plate shape, a combination of the four cams as described above is generally used. It was a thing.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2002-206520 A

  However, in the above conventional opening / closing device, the four fixed cams 2B and the four movable cams 4A and 4B meshing with each other are formed at equal intervals on the same radius with respect to the rotation center. There was a problem that the cams meshed on the way, and the feeling of being caught was felt.

  The present invention solves such a conventional problem, and an object of the present invention is to provide an opening / closing device capable of a smooth and reliable opening / closing operation.

  In order to achieve the above object, the present invention has the following configuration.

  The invention according to claim 1 of the present invention is such that four opposed cams and movable cams on the outer periphery of the through hole are formed inward, and a pair in a direction orthogonal thereto is formed outward. By providing a pair of cams at 0 and 180 degrees and a pair of cams at 90 and 270 degrees, one on the inside and the other on the outside, a closed state or an open state during the opening / closing operation Until this time, the fixed cam and the movable cam do not mesh with each other, so that it is possible to obtain an opening / closing device that does not have a catching feeling and that can be opened and closed smoothly and reliably.

  The invention according to claim 2 is the invention according to claim 1, wherein the sliding body is sandwiched between the end of the fixed shaft and the movable body, and the sliding body rotates the movable body with respect to the fixed shaft. Since this is performed smoothly, the operation feeling can be further improved.

  As described above, according to the present invention, it is possible to obtain an advantageous effect that it is possible to realize an opening / closing device capable of a smooth and reliable opening / closing operation.

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

  In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of background art, and detailed description is simplified.

(Embodiment)
FIG. 1 is a cross-sectional view of a switchgear according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, in which 1 is a substantially plate-like metal fixed body such as steel or copper alloy, 12 Is a disc-shaped moderation plate made of steel, copper alloy or the like. A substantially oval through-hole 1A is formed at the left end of the fixed body 1, and a substantially oval through-hole 12A of the moderation plate 12 is formed on the outer peripheral lower surface. Four convex fixed cams 13A to 13D are provided at intervals of 90 degrees.

  In these four fixed cams, a pair of opposed fixed cams 13A and 13C at positions of 0 ° and 180 ° with respect to the longitudinal direction of the fixed body 1 are outside, and 90 ° and 270 in a direction orthogonal thereto. The pair of fixed cams 13B and 13D at the right angle are formed on different radiuses from the center of the through-hole 12A.

  14 is a substantially plate-like movable body made of steel, copper alloy, or the like, and a circular through hole 14A is formed at the right end, and the outer peripheral surface of the through hole 14A is 0 with respect to the longitudinal direction of the movable body 14. , 90, 180, and 270 degrees, four concave movable cams 15A to 15D at intervals of 90 degrees, and 20,110 with respect to the longitudinal direction of the movable body 14 separated from the movable cams 15A to 15D by 20 degrees. , 200, and 290 degrees are provided with four concave movable cams 16A to 16D.

  The pair of opposed movable cams 15A and 15C at 0 and 180 degrees and 16A and 16C at 20 and 200 degrees are outside, and a pair of 90 degrees and 270 degrees in the orthogonal direction. The movable cams 15B and 15D at the positions and 16B and 16D at the positions of 110 degrees and 290 degrees are formed inwardly on different radii from the center of the through hole 14A.

  Further, 5 is a substantially ring-shaped spring made of a thin metal plate, which is mounted in a slightly bent state between the lower surface of the fixed body 1 and the moderation plate 12, and the moderation plate 12 is urged downward by the spring 5, The fixed cams 13A to 13D on the lower surface of the moderation plate 12 and the movable cams 15A to 15D on the upper surface of the movable body 14 are in elastic contact.

  Reference numeral 6 denotes a metal-made hollow cylindrical fixed shaft, and the cylindrical portion 6A passes through the through hole 1A of the fixed body 1 and the spring 5, the through hole 12A of the moderation plate 12, and the through hole 14A of the movable body 14, A head 6B having a larger outer diameter than the cylinder portion 6A is formed at the lower end.

  Furthermore, a sliding body 17 such as carbon-filled nylon or nickel-plated steel is sandwiched between the head 6B and the lower surface of the movable body 14 in a ring shape.

  Then, since the upper end of the cylindrical portion 6A of the fixed shaft 6 protruding from the upper surface of the fixed body 1 meshes with the movable cams 15A to 15D and 16A to 16D, a gap is formed so that the moderation plate 12 can move up and down, and a substantially conical punch (Not shown) or the like is wound downward and formed into a winding portion having an outer diameter larger than that of the cylindrical portion 6A, and each part is engaged by the fixed shaft 6 to constitute an opening / closing device.

  Since flat portions 6C are formed on both side surfaces of the cylindrical portion 6A of the fixed shaft 6, the movable body 14 having a circular through-hole 14A through which the cylindrical portion 6A is inserted is rotatable relative to the fixed shaft 6. The fixed body 1 and the moderation plate 12 whose through holes 1A and 12A are substantially oval are locked so as not to rotate, that is, the movable body 14 is fixed to the fixed body 1 and the fixed shaft 6 via the fixed shaft 6. The moderation plate 12 is rotatably engaged.

  In addition, the opening / closing device configured in this way has a movable body 14 as a display screen, for example, on a fixed housing of a device in which a fixed body 1 is provided with a plurality of operation units, microphones, and the like such as a mobile phone and a video camera. In addition, the electronic device is configured such that the movable casing is fixed to a movable casing provided with a speaker, a camera, and the like, and the movable casing can be opened and closed with respect to the fixed casing by the opening / closing device.

  In the above configuration, as shown in the cross-sectional view of the main part in FIG. 3A, in a state where the movable body 14 overlaps the fixed body 1 in parallel, that is, in a state where the movable housing is closed with respect to the fixed housing. A pair of opposed fixed cams 13A, 13C on the outer periphery of the through hole 12A of the moderation plate 12 biased by the spring 5 is a pair of outer movable cams 15A on the outer periphery of the through hole 14A of the movable body 14. , 15C and a pair of fixed cams 13B, 13D which are inward in the orthogonal direction mesh with the pair of inward movable cams 15B, 15D, respectively, and the movable housing is held in a closed state.

  Further, when the movable casing 14 is opened and the movable body 14 is rotated counterclockwise from this closed state, the movable cams 15A to 15D are disengaged from the fixed cams 13A to 13D. 13A-13D elastically slides on the upper surface of the movable body 14 on the outer periphery of the through hole 14A.

  For example, as shown in FIG. 3D, when the movable body 14 is rotated counterclockwise by 160 degrees, the pair of outer fixed cams 13A and 13C and the movable cams 16C and 16A are paired inward. The fixed cams 13B and 13D and the movable cams 16D and 16B mesh with each other, and the movable casing is held in a state of being opened 160 degrees with respect to the fixed casing.

  Further, as described above, the pair of opposed fixed cams 13A and 13C and the movable cams 15A, 15C and 16A and 16C are disposed outwardly, and the pair of fixed cams 13B and 13D and the movable cams 15B and 15D in the direction orthogonal thereto are arranged. 16B and 16D are formed inwardly on different radii from the center of rotation, so as shown in FIGS. 3B and 3C, 70 degrees and 90 degrees in the middle of opening the movable housing At these rotational angles, the cams do not mesh because their positions are shifted.

  That is, in the state of FIG. 3B in which the movable body 14 is rotated by 70 degrees, the inner movable cams 16D and 16B are provided on the outer fixed cams 13A and 13C, and the outer fixed cams 13B and 13D are provided on the outer fixed cams 13B and 13D. Since the movable cams 16A and 16C closer to each other are positioned, these cams do not mesh.

  Further, in the state shown in FIG. 3C in which the movable body 14 is rotated 90 degrees, the inner fixed cams 13A and 13C are provided with the inner movable cams 15D and 15B, and the inner fixed cams 13B and 13D are provided with the outer movable cams 15B and 13D. Since the movable cams 15A and 15C closer to each other are positioned, these cams do not mesh.

  That is, until the movable casing is opened from the closed state to 160 degrees or 180 degrees, the outer movable cam does not mesh with the outer movable cam, or the inner movable cam does not mesh with the inner stationary cam. Since the cams formed on the same radius from the center of rotation do not mesh with each other in the middle, there is no feeling of catching at the time of opening / closing operation, and a smooth and reliable opening / closing operation is possible.

  Further, since the sliding body 17 is sandwiched between the head 6B at the lower end of the fixed shaft 6 and the lower surface of the movable body 14, the friction during the rotation of the movable body 14 is reduced and the rotation is performed smoothly. You can get a good feeling of operation.

  As described above, according to the present embodiment, the four opposed cams 13A to 13D and the movable cams 15A to 15D and 16A to 16D are rotated so that the opposed pair is inward and the pair in the orthogonal direction is outward. By forming on different radii from the center, the fixed cam and the movable cam do not mesh until the closed or open state during the opening and closing operation, so there is no feeling of catching and a smooth and reliable opening and closing device is obtained. It is something that can be done.

  In addition, since the sliding body 17 is sandwiched between the end of the fixed shaft 6 and the movable body 14, the movable body 14 is smoothly rotated with respect to the fixed shaft 6. can do.

  In the above description, the movable body 14 includes eight movable cams 20 degrees apart, which are the movable cams 15A to 15D for holding at 0 degrees and 180 degrees and the movable cams 16A to 16D for holding at 160 degrees. However, the present invention can be implemented using only one of the four movable cams.

  Further, the configuration using the three structural parts of the fixed body 1, the moderation plate 12, and the movable body 14 has been described, but a convex fixed cam is integrally formed on the lower surface of the fixed body 1, and the lower end of the fixed shaft 6 is formed. If the spring 5 is mounted between the head 6B and the lower surface of the movable body 14 and the movable body 14 is urged toward the fixed body 1 by the spring 5, the number of parts used is reduced, and an opening / closing device is formed at a low cost. can do.

  The switchgear according to the present invention can provide a smooth and reliable switchgear 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 Cross section of the main part Exploded perspective view of a conventional switchgear Cross section of the main part

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed body 1A Through-hole 5 Spring 6 Fixed shaft 6A Cylinder part 6B Head part 6C Flat part 12 Moderation plate 12A Through-hole 13A, 13B, 13C, 13D Fixed cam 14 Movable body 14A Through-hole 15A, 15B, 15C, 15D Movable cam 16A, 16B, 16C, 16D Movable cam 17 Sliding body

Claims (2)

A fixed body provided with four fixed cams on the outer peripheral lower surface of the through hole, a movable body arranged rotatably with respect to the fixed body, and provided with four movable cams on the outer peripheral upper surface of the through hole; A pair of springs that elastically contact the fixed cam and the movable cam and a fixed shaft that passes through the through holes of the fixed body and the movable body and engages them in a rotatable manner. An opening / closing device in which a pair in a direction orthogonal to the inner side is formed outward. 2. The opening / closing device according to claim 1, wherein a sliding body is sandwiched between the end of the fixed shaft and the movable body.

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