JP4198564B2 - Push button switch - Google Patents

Description

  The present invention relates to a push button switch, and more particularly to a mechanism that facilitates a push operation of a frequently operated automatic return type push button switch.

A conventional automatic return type pushbutton switch has a structure in which a plunger such as polyacetal is slid directly on a case made of fiber reinforced PBT or the like.
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  As described above, even if a plunger such as polyacetal with good sliding characteristics is used, the plunger slides on a paper file (glass fiber case) because it rubs against a case made of resin containing glass fiber. It is the same as that, and it causes a rustling and stubborn feeling. In addition, rattling of the plunger occurs. In particular, in a pushbutton switch that is frequently operated, an unpleasant feeling during the push operation has become a problem.

  In view of the above situation, an object of the present invention is to provide a pushbutton switch that can suppress the rattling, the stubborn feeling, and the rattling of the plunger at the time of operation, and can make the push operation of the pushbutton switch smooth and comfortable. To do.

In order to achieve the above object, the present invention provides
[1] In the pushbutton switch, a semicircular first engaging groove is formed in the longitudinal direction of the inner wall of the case , and a semicircular second engaging groove is formed in the longitudinal direction of the outer wall of the plunger . A round pin having a diameter smaller than the diameter of the circular engagement groove formed so that one engagement groove and the second engagement groove are opposed to each other is loosely fitted into the circular engagement groove. The round pin is used as a rail to guide the movement of the plunger with respect to the case, thereby producing a smooth operation feeling.

[ 2 ] In the pushbutton switch according to the above [ 1 ], the engagement groove is formed in the entire height of the inner wall of the case, and the length of the round pin is slightly shorter than the height of the inner wall. It is characterized by.

[3] also [1] In pushbutton switch [2], wherein the round pin is characterized in that it consists of metal or nanocomposite nylon.

[4] [1], [2] or the push button switch [3], wherein the case and the plunger is a horizontal cross-section square shape, the round pin the rectangular case and the plunger It arrange | positions at each of these four corners or its vicinity, It is characterized by the above-mentioned.

  According to the present invention, it is possible to improve the operability most important in the pushbutton switch, to suppress the backlash, the crumb feeling and the rattling of the plunger during operation, and to make the pushbutton switch push operation smooth and comfortable. it can.

  The round pin can be engaged with engagement grooves formed on the inner wall of the case and the outer wall of the plunger, respectively, and has a high mechanical strength and a small friction coefficient, for example, a metal such as stainless steel or nanocomposite nylon By using, smooth operation can be performed with a long life.

  When the horizontal cross section of the case and the plunger is rectangular, the round pins are preferably arranged at or near the four corners where the influence of warping and distortion of each part is not likely to occur. Moreover, by having the shape of a round pin, the sliding contact area can be reduced, the fitting dimension can be suppressed to near zero, and the rattling of the plunger can also be suppressed small.

  The switch is operated by lowering the plunger until the button is pushed by the operator's finger and the lower end surface of the diffuser contacts the upper end surface of the cover. When the operator's finger can release the button, the plunger is returned upward by the return coil spring. During the downward movement of the plunger, the plunger is smoothly guided downward using the round pin as a rail, so there is no rustling or sag feeling during operation, and there is no backlash of the plunger due to the gap between the case and the plunger. Suppression is suppressed.

  Hereinafter, embodiments of the present invention will be described in detail.

  1 is an exploded perspective view of a pushbutton switch showing an embodiment of the present invention, FIG. 2 is a top view of the pushbutton switch, FIG. 3 is a front view of the pushbutton switch, and FIG. 4 is a side view of the pushbutton switch. FIG. 5 is a bottom view of the push button switch, FIG. 6 is a perspective view of the main part showing a combination of the plunger, round pin, and case of the push button switch, and FIG. 7 is a cross-sectional view taken along the line AA ′ of FIG. 8 is a sectional view taken along the line BB 'in FIG. 2, FIG. 9 is a sectional view taken along the line CC' in FIG. 2, and FIG. 10 is a diagram showing the arrangement when the plunger, round pin, and case are viewed from above. is there.

  In these drawings, reference numeral 1 denotes a rectangular case (hereinafter referred to as a case), and 1A denotes a rectangular cylindrical portion formed at the center of the case 1. The rectangular cylindrical portion 1A includes an illumination light emitting diode (1). (Not shown) and the like are accommodated. Reference numeral 1B denotes a recess in which a hanging piece of a cover, which will be described later, is fitted. Reference numeral 1C denotes a protrusion protruding from the recess 1B.

  2 is an inner wall surface of the case 1, 2 A is a semicircular engagement groove in which a round pin 3 formed in the longitudinal direction of the inner wall surface 2 is loosely fitted, 4 is a coil spring for returning the plunger, and 5 is in the case 1 Switch element 6 is a square cylindrical plunger, 6A is a concave portion of plunger 6 to which a later-described torsion coil spring is mounted, 7 is an outer wall surface of plunger 6, and 7A is formed in a vertical direction of outer wall surface 7. An engagement groove into which the semicircular round pin 3 is loosely fitted, 8 is a torsion coil spring provided between the case 1 and the plunger 6 to provide a click feeling of the switch, and 9 is fitted to the upper end of the case 1 A cover 9A is a hanging piece, 9B is an opening formed in the hanging piece 9A, 10 is a diffuser fitted to the upper end of the plunger 6, and 11 is a button fitted to the diffuser.

  In this way, the round pin 3 is arranged between the case 1 and the plunger 6, and the movement of the plunger 6 with respect to the case 1 is guided using the round pin 3 as a rail so as to produce a smooth operation feeling.

  Hereinafter, the specific configuration will be described in detail.

  6 showing a perspective view of the main part, FIG. 7 showing a sectional view taken along line AA ′ of FIG. 2, and FIG. 9 showing a sectional view taken along line CC ′ of FIG. On the other hand, an engagement groove 2A of the round pin 3 is formed on the outer wall surface 7 of the plunger 6, and an engagement groove 7A of the round pin 3 is formed. Therefore, when the plunger 6 is pushed down, the plunger 6 is guided with respect to the case 1 by using the round pin 3 as a rail. Therefore, there is no rattling and sag feeling, and the rattling of the plunger is suppressed and a smooth operation feeling is achieved. Obtainable. A torsion coil spring 8 (see FIG. 1) is mounted in the recess 6A of the plunger 6. The torsion coil spring 8 constitutes a click mechanism when the switch is operated, and a push button switch with or without a click feeling can be easily obtained by the presence or absence of the torsion coil spring 8.

  The cover 9 is provided with hanging pieces 9A on two opposite sides, and an opening 9B is formed in the vicinity of the lower end of the hanging piece 9A. When the cover 9 is assembled to the case 1, the opening 9B Are fitted into protrusions 1C projecting from the recesses 1B formed on the two opposite sides. Further, a diffuser 10 and then a button 11 are assembled on the top of the plunger 6.

  Further, when the button 11 is pressed by the operator's finger and the plunger 6 is lowered until the lower end surface of the diffuser 10 comes into contact with the upper end surface of the cover 9, the switch is operated. When the operator's finger releases the button 11, the plunger 6 is returned upward by the return coil spring 4 (see FIG. 8). When the plunger 6 moves downward, the plunger 6 is guided downward by using the round pin 3 as a rail (see FIG. 7 and FIG. 9), there is no rustling and stubborn feeling, and between the case 1 and the plunger 6 The backlash of the plunger due to the gap is suppressed.

  Here, the round pin 3 is loosely fitted in the engaging grooves 2A and 7A, and the length of the round pin 3 is slightly shorter than the height of the inner wall of the case 1, so that the round pin 3 is also in the length direction. It arrange | positions so that there may be play g.

  Since the round pin 3 is loosely fitted between the case 1 and the plunger 6 in this way, the round pin 3 can move in the rotational direction and the axial direction. In addition, the entire surface can be worn out in a well-balanced manner, thereby extending the life.

  Further, as shown in FIG. 10, since the round pins 3 are arranged in the vicinity of the four corners of the rectangular case 1 and the plunger 6, the plunger 6 can be moved in a balanced manner, and the smooth operation is achieved. Can be urged. Even if the round pins 3 are arranged at the four corners of the rectangular case 1 and the plunger 6, the same effect can be obtained.

  FIG. 11 is an exploded perspective view of an illuminated pushbutton switch showing another embodiment of the present invention. In this embodiment, the LED holder 12 is held in the rectangular cylindrical portion 1A of the case 1 and held by the LED holder 12. LED13 to be used is arranged. Others are the same as those of the push button switch shown in FIGS.

  FIG. 12 is a perspective view of a main part showing a case and a plunger of a round pushbutton switch showing still another embodiment of the present invention, and FIG. 13 is a cross-sectional view of the main part in the horizontal direction.

  In this figure, 21 is a round case, 22 is an inner wall surface of the case, 22A is an engagement groove of a round pin 23 formed in the longitudinal direction of the inner wall surface 22, 24 is a round plunger, and 25 is a round shape. The outer wall surface 25A of the plunger 24 of the mold is an engagement groove of the round pin 23 formed in the longitudinal direction of the outer wall surface 25. In this embodiment, the engagement grooves 22A and 25A are divided into three equal parts in the circumferential direction. Are formed in the vertical direction at the positions (0 °, 120 °, and 240 ° positions), the round pins 23 are arranged in the vertical direction, and the total number of the round pins 23 is three. .

  Although not shown, instead of this, the engaging grooves are formed in the longitudinal direction at positions (0, 90, 180, and 270 degrees) divided into four equal parts in the circumferential direction, and the round pins are total You may make it arrange | position four.

  In addition, this invention is not limited to the said Example, A various deformation | transformation is possible based on the meaning of this invention, and these are not excluded from the scope of the present invention.

  The push button switch of the present invention is particularly suitable for an automatic return type push button switch that is frequently operated and requires smooth and comfortable.

It is a disassembled perspective view of the pushbutton switch which shows the Example of this invention. It is a top view of the pushbutton switch which shows the Example of this invention. It is a front view of the pushbutton switch which shows the Example of this invention. It is a side view of the pushbutton switch which shows the Example of this invention. It is a bottom view of the pushbutton switch which shows the Example of this invention. It is a principal part perspective view which shows the middle of the combination of the plunger of a pushbutton switch which shows the Example of this invention, a round pin, and a case. It is AA 'sectional drawing of FIG. It is BB 'sectional drawing of FIG. It is CC 'sectional drawing of FIG. It is a figure which shows arrangement | positioning when the state which combined the plunger, round pin, and case of the pushbutton switch which shows the Example of this invention was seen from upper direction. It is a disassembled perspective view of the illumination type pushbutton switch which shows the other Example of this invention. It is a principal part perspective view which shows the case and plunger of a round pushbutton switch which show the further another Example of this invention. It is principal part sectional drawing of the horizontal direction which shows the case and plunger of a round pushbutton switch which show the further another Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Square-shaped case 1A Square-shaped cylinder part 1B Recessed part 1C Protrusion 2 Inner wall surface of square-shaped case 2A, 7A Semicircular engagement groove 3,23 Round pin 4 Coil spring for plunger return 5 Arranged in case Switch element 6 Square tubular plunger 6A Recessed portion where torsion coil spring is mounted 7 Outer wall surface of plunger 8 Torsion coil spring 9 Cover fitted to upper end of case 9A Hanging piece 9B Opening 10 Diffuser 11 Button 12 LED holder 13 LED
g Play 21 Round case 22 Inner wall surface of round case 22A Engagement groove on inner surface of round case 24 Round plunger 25 Outer wall surface of round plunger 25A Engagement of outer wall surface of round plunger Groove

Claims (4)

A first semicircular engagement groove is formed in the longitudinal direction of the inner wall of the case , and a second semicircular engagement groove is formed in the vertical direction of the outer wall of the plunger , and the first engagement groove and the first engagement groove are formed. A round pin having a diameter smaller than the diameter of the circular engagement groove formed so as to face the two engagement grooves so as to be loosely fitted in the circular engagement groove; A push button switch characterized in that the movement of the plunger with respect to the case is guided by using a rail as a rail to create a smooth operation feeling. 2. The pushbutton switch according to claim 1 , wherein the engaging groove is formed at the entire height of the inner wall of the case, and the length of the round pin is slightly shorter than the height of the inner wall. Pushbutton switch. In pushbutton switch according to claim 1 or 2, wherein said round pin, push button switch which comprises a metal or a nanocomposite nylon. In claim 1, 2 or pushbutton switch 3, wherein the casing and the plunger is a horizontal cross-section square shape, each placing the round pins at four corners or near the rectangular case and the plunger A pushbutton switch characterized by

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