JPH0527925U - Button switch - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a button switch for a communication terminal, a desktop calculator, etc., which does not malfunction even if the sugar-containing beverage liquid spills on the surface plate. To do. [Structure] A printed board 1 in which contact pattern pairs 2 to be connected are arranged, a rubber switch 20 stretched on the surface of the printed board 1 and in which a contact portion 21 is arranged at a position facing the contact pattern pair 2, and the print. A switch device including a front plate (5) in which holes (6) are mounted parallel to each other above the plate (1) and a button (30) mounted on the front plate (5). Multiple Arms 35
And a protrusion 36 which is provided at the tip of each arm 35 so as to project upward and whose upper tip portion is locked to the back surface of the face plate 5.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to button switches for communication terminals, desk calculators, and the like.

[0002]

[Prior Art]

 FIG. 3 is a view of a conventional example, (A) is a sectional view, (B) is a perspective view of a button, and FIG. 4 is a sectional view showing a main part of the conventional example.

In the figure, the switch device has a contact pattern pair 2 arranged in a lattice pattern on the surface of a printed board 1 so as to mesh with each other in a key shape, and each contact pattern pair 2 is formed by a rubber switch 20 described later. I try to turn it on and off.

Reference numeral 20 denotes a rubber switch made of an elastic rubber plate, which is stretched on the surface of the printed board 1. In the rubber switch 20, cylindrical contact portions 21 having an upper bottom are arranged in a lattice pattern so as to face each contact pattern pair 2, and a conductive rubber or the like is formed in a lower portion inside each contact portion 21. The conductor member 25 is fixed.

Reference numeral 5 denotes a surface plate mounted in parallel above the printed board 1, and has square holes 6 formed at positions facing the respective contact portions 21 of the rubber switch 20. The surface plate 5 also serves as the surface plate of the case that houses the printed board 1.

Reference numeral 10 denotes a button including a rectangular button body 11 and an edge frame 12 provided on the outer periphery of the lower portion of the button body 11. The button 10 is mounted on the surface plate 5 with the button body 11 loosely fitted in the hole 6 of the surface plate 5 and the lower end surface of the button body 11 abutting the upper surface of the contact portion 21 of the rubber switch 20. ..

The button 10 is constantly urged and pushed up by the elastic force of the contact portion 21, and the upper end surface of the edge frame 12 is locked to the back surface of the front plate 5. Since the switch device is configured as described above, when the button 10 is pressed with a finger, the contact portion 21 of the rubber switch 20 is pushed down against its elasticity, and the conductor member 25 provided inside the contact portion 21 is pressed. Abut on the contact pattern pair 2 so as to straddle them.

Therefore, the contact pattern pair 2 is turned on, and the contact circuit is in the connected state. Then, when the finger is released, the contact point portion 21 returns due to its elasticity, so that the contact point pattern pair 2 is turned off.

[0009]

[Problems to be solved by the device]

 By the way, when the sugar-containing beverage liquid 8 such as juice or coffee spills on the surface plate 5 on which the buttons 10 are arranged, the sugar-containing beverage liquid 8 enters the gap between the button body 11 and the hole 6 as shown in FIG. Then, there is a problem that the upper end surface of the edge frame 12 is hardened and hardened, the upper end surface of the edge frame 12 adheres to the surface plate 5, and the operation of the button 10 becomes impossible.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a button switch that does not malfunction even if the sugar-containing beverage liquid spills on the surface plate. ..

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention, as illustrated in FIG. 1, includes a printed board 1 on which contact point pairs 2 to be connected are arranged, and a contact pattern pair that is stretched on the surface of the printed board 1. 2, a rubber switch 20 having contact points 21 arranged at a position facing each other, a surface plate 5 mounted in parallel above the print plate 1, and a bottom surface abutted against and supported by an upper end surface of the contact point 21, A button 30 is attached to the surface plate 5 by loosely fitting the hole 6 of the surface plate 5, and when the button 30 is pressed down, the conductor member 25 provided on the lower surface of the contact portion 21 becomes a contact pattern pair. In the switch device in which 2 is turned on, a plurality of arms 35 horizontally projecting outward from the lower part of the side wall of the button body 31 are provided, and a projection 36 projecting upward is provided at the tip of each arm 35. The upper tip of the above is locked to the back surface of the front plate 5.

Further, as illustrated in FIG. 2, a plurality of arms 35 that horizontally project outward from the lower portion of the side wall of the button body 31 are provided. On the other hand, a protrusion 55 whose lower tip contacts the upper surface of the tip of the arm 35 is provided on the back side of the front plate 5.

[0013]

[Action]

 The button of the present invention is provided with an arm protruding horizontally from the side wall of the button body, and an upward protrusion is provided at the tip of the arm, or a protrusion corresponding to the arm is provided on the surface plate side. .. Therefore, the button urged upward by the contact portion of the rubber switch is always locked to the front plate with a sufficiently large gap between the upper surface of the arm and the back surface of the front plate.

Therefore, even if the sugar-containing beverage liquid spills on the surface plate and enters the switch device through the hole, the sugar-containing beverage liquid falls from the peripheral portion of the button to the surface of the rubber switch, so that the peripheral portion of the button or the arm. It never stays on top.

That is, since the button and the surface plate do not come into close contact with each other, the button switch does not malfunction.

[0016]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings. The same reference numerals denote the same objects throughout the drawings.

FIG. 1 is a view of an embodiment of the present invention, (A) is a sectional view, (B) is a perspective view of a button, and FIG. 2 is a view of another embodiment of the present invention, (A) is a sectional view. Figure, (B) is a perspective view of the button. In FIG. 1, contact pattern pairs 2 facing each other so as to mesh with each other in a key shape are formed in a grid pattern on the surface of the printed board 1, and a rubber switch 20 made of an elastic rubber plate is attached to the surface of the printed board 1. It is set up.

In this rubber switch 20, cylindrical contact portions 21 each having an upper bottom are arranged in a grid pattern so as to face each contact pattern pair 2, and a conductive material is provided at a lower portion inside each contact portion 21. A conductor member 25 made of rubber or the like is fixed.

The surface plate 5 mounted in parallel above the printed board 1 is provided with square holes 6 at positions facing the respective contact portions 21 of the rubber switch 20. A button 30 is composed of a rectangular button body 31 and two arms 35 that horizontally project outward in the lower portions of the opposite side walls of the button body 31. A protrusion 36 protruding upward is provided at the tip of each arm 35. An escape 29 is provided on the side wall of the button body 31.

In the button 30 as described above, the button body 31 is loosely fitted in the hole 6 of the surface plate 5, and the lower end surface of the button body 31 is in contact with the upper surface of the contact portion 21 of the rubber switch 20. It is attached to the face plate 5.

Therefore, the button 30 is constantly urged and pushed up by the elastic force of the contact portion 21, and the upper end portion of the protrusion 36 is locked to the back surface of the front plate 5. The button body 31 is not limited to the rectangular shape, but has a cylindrical shape, and arms may be provided radially.

Since the switch device is configured as described above, when the button 30 is pressed with a finger, the contact portion 21 of the rubber switch 20 is pushed down against its elasticity, and the switch device is provided inside the contact portion 21. The conductor member 25 abuts so as to straddle the contact pattern pair 2.

Therefore, the contact pattern pair 2 is turned on, and the contact circuit is brought into the connected state. Then, when the finger is released, the contact point portion 21 returns due to its elasticity, so that the contact point pattern pair 2 is turned off.

As described above, the button 30 biased upward by the contact portion 21 of the rubber switch 20 always has a sufficiently large gap between the upper surface of the arm 35 and the back surface of the front plate 5. Therefore, it is locked to the surface plate 5.

Therefore, even if the sugar-containing beverage liquid spills on the surface plate and enters the switch device through the hole 6, the sugar-containing beverage liquid falls from the peripheral portion of the button to the surface of the rubber switch, so that the peripheral portion of the button or It never stays on the arm.

The button 30 shown in FIG. 2 includes a rectangular button body 31 and two arms 35 that horizontally project outward in the lower portions of the opposite side walls of the button body 31. 35 has no protrusion.

On the other hand, a protrusion 55 whose lower tip contacts the upper surface of the tip of the arm 35 is provided on the back surface side of the surface plate 5. Therefore, the button 30 biased upward by the contact portion 21 of the rubber switch 20 always has a sufficiently large gap between the upper surface of the arm 35 and the back surface of the front plate 5, and the front plate 5 has a sufficiently large gap. Is locked to.

Therefore, even if the sugar-containing beverage liquid spills on the surface plate and enters the switch device through the hole 6, the sugar-containing beverage liquid falls from the peripheral portion of the button to the surface of the rubber switch, and the peripheral portion of the button or It never stays on the arm.

[0029]

[Effect of the device]

 As described above, according to the present invention, the arm protruding horizontally from the side wall of the button body is provided, and the protrusion of the arm is provided at the tip of the arm or the protrusion corresponding to the arm is provided on the surface plate side. ing.

Therefore, the button urged upward by the contact portion of the rubber switch always engages the front plate with a sufficiently large gap between the upper surface of the arm and the back surface of the front plate. It has stopped.

Therefore, even if the sugar-containing beverage liquid spills on the surface plate and enters the switch device through the hole, the sugar-containing beverage liquid falls from the peripheral portion of the button to the surface of the rubber switch, and the peripheral portion of the button or on the arm. Since the button does not stay in place, the button does not come into close contact with the surface plate and the button switch does not malfunction.

[Brief description of drawings]

FIG. 1 is a diagram of an embodiment of the present invention, in which (A) is a sectional view and (B) is a perspective view of a button.

FIG. 2 is a view of another embodiment of the present invention, in which (A) is a sectional view and (B) is a perspective view of a button.

FIG. 3 is a view of a conventional example, (A) is a cross-sectional view, and (B) is a perspective view of a button.

FIG. 4 is a cross-sectional view showing the main points of a conventional example.

[Explanation of symbols]

1 printed board, 2 contact pattern pairs, 5 surface board, 6 holes, 8 sugar-containing beverage liquid,
10,30 button, 11,31 button body, 12 edge frame, 20 rubber switch, 21 contact part, 25 conductor member, 35 arm, 36,55
Protrusion,

Claims (2)

[Scope of utility model registration request] 1. A printed board (1) in which contact pattern pairs (2) to be connected are arrayed, and a contact is provided on a surface of the printed board (1) so as to face the contact pattern pair (2). Division (21)
Rubber switches (20) arranged in parallel with each other, and contact points (2) of the rubber switches (20) mounted in parallel above the printed board (1).
A surface plate (5) having holes (6) arranged at positions corresponding to (1) and a bottom surface supported by the contact portion (21) and loosely fitted in the holes (6) to be mounted on the surface plate (5). And a button (30) which is
In the switch device in which the conductor member (25) provided inside the contact part (21) turns on the contact pattern pair (2) by pressing, the button body (31) moves from the lower part of the side wall to the outside. A plurality of horizontally projecting arms (35) and projections (3) that are provided to project upward at the tips of the respective arms (35) and whose upper tips are locked to the back surface of the face plate (5).
6) Button switch characterized by having and. 2. The switch device according to claim 1, wherein a plurality of arms (35) horizontally projecting outward from a lower portion of a side wall of the button body (31) and downwardly projecting to a back surface of the face plate (5). A button switch, which is disposed, and has a lower tip portion having a protrusion (55) that abuts an upper surface of the tip portion of the arm (35).