JPH04123034U - tact switch - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a tact switch that can simultaneously turn on and off a plurality of independent circuits by pressing the stem. [Structure] Conductive movable contacts 17 and 18 are provided on a base film 15 made of an insulating material, separated from each other via an insulating part 16 provided in the center, and fixed contacts 12a, 14a, 12b, 14b are provided in the housing 10, the fixed contacts 14a, 14b are always in contact with the movable contacts 17, 18, and the fixed contacts 12a, 12b
are opposed to the movable contacts 17, 18 via gaps 27, 28, and the movable contacts 17, 1 are moved by the pressure of the stem 23.
8 are brought into contact with fixed contacts 12a and 12b, respectively, at the same time.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a technology that can turn on and off multiple independent circuits at the same time. This is about a switch.

0002

[Conventional technology]

As a tact switch that can turn on and off two circuits, for example, the Utility Model 57-4 It is described in Japanese Patent No. 9878.

0003 Figures 5 and 6 are explanatory diagrams of this tact switch, and Figure 5 shows the operation of the tact switch. 6 is a circuit diagram of the tact switch.

0004 In FIG. 5, 1 is a housing, and 2 is a pair of bottoms provided around the recess 3 of the housing 1. 4 is the central fixed contact provided between the 2 fixed contacts in the lower tier, 5 is the front The upper fixed contacts 6 and 7 formed in the upper part of the recess 3 are made of elastic material such as phosphor bronze. A movable contact member formed by punching from a conductive material, and the lower movable contact member 6 has a substantially spherical surface. The upper movable contact member 7 has a movable portion curved in an arc shape. and, When the push button 8 is not pressed, the lower and upper movable contacts move as shown in FIG. The point members 6 and 7 are in contact with the fixed contacts 2 and 5, respectively, and the push button 8 is in contact with the upper movable contact. It is supported on the top of the point member 7. If push button 8 is pressed downward from this state, The button 8 pushes down the apex of the movable part of the upper movable contact member 7 and reverses it, as shown in FIG. As shown in b), the upper movable contact member 7 and the lower movable contact member 6 are in contact with each other, and As shown in (a), the lower fixed contact 2 and the upper fixed contact 5 are turned ON, and the upper fixed contact 2 is turned on. The fixed contact 5 and the central fixed contact 4 are OFF.

[0005] If the push button 8 is pressed further downward from this state, the upper The lower movable contact member 7 presses the lower movable contact member 6, and the lower movable contact member 6 It contacts the center fixed contact 4, and connects the upper fixed contact 5 and the lower one as shown in Figure 6 (b). The fixed contacts 2 in the stages and the fixed contacts 4 in the center are turned on at the same time.

[0006]

[Problem that the idea aims to solve]

By the way, the tact switch with the above structure has only one circuit turned on. The other circuits turn on after a short delay, and the two circuits turn on. The ON timing of the circuit is off, and the upper movable contact member 6 is placed on the lower movable contact member 6. The moving contact member 7 is arranged, the number of parts increases, and the height of the tact switch increases. There were various problems such as increased size.

[0007] This invention attempts to solve the above-mentioned problems, and the purpose of this invention is to can turn on multiple independent circuits at the same time, and has a small number of components. A tact switch that can fit in the corner and reduce the height of the switch body. This is what we are trying to provide.

[0008]

[Means to solve the problem]

In order to achieve the above objectives, this invention uses a base film made of an insulating material. A plurality of movable contacts are provided separately from each other in the system, and a small number of movable contacts are provided in the system. At least two fixed contacts are provided on the housing side, one of the fixed contacts being connected to the The other is in constant contact with the movable contact, and the other is opposed to the movable contact through a gap. A return spring is interposed between the base film and the stem that presses the base film. It has an existing configuration.

[0009]

[Effect]

The tact switch of the present invention has the above-mentioned configuration, and is based on a stem. When the film is pressed, multiple movable contacts form fixed contacts facing each other across a gap. When the points are turned ON at the same time and the pressure on the stem is removed, the stem will be released by the return spring. Since the original state is restored, multiple circuits can be turned on at the same time by pressing the stem. Can be turned off.

0010 Additionally, the two movable contact members that were previously required can be replaced with one base film. This reduces the number of parts and reduces the height of the tact switch. It is possible to do so.

[0011] In addition, by using a base film made of an insulating material as a movable contact member, This makes it possible to form two or more independent circuits, and this base film Since the fixed contacts of the switch are covered, dustproof performance can be improved.

0012

【Example】

Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0013] 1 to 4 are explanatory diagrams of an embodiment of the present invention, and FIG. 1 is a sectional view of a tact switch. , Figure 2 is an exploded perspective view of the tact switch, and Figure 3 is the tact switch with some parts removed. FIG. 4 is a plan view of the switch and is an explanatory diagram of the operation of the tact switch.

[0014] 1 and 2, 10 is a housing, and the recess 11 of the housing 10 is A pair of lower fixed contacts 12a and 12b are fixed. The upper part of the recess 11 A step portion 13 is formed in the step portion 13, and the upper fixed contacts 14a and 14b are fixed to the step portion 13. The fixed contacts 12a and 14a constitute a first contact, and the fixed contacts 12a and 14a constitute a first contact. Points 12b and 14b constitute a second contact. 15 is a base plate made of an insulator. On one side of the film 15, the insulating part 16 is left in the center, and the left side has the above-mentioned part. A movable contact 17 is provided to short-circuit the first contact, and the movable contact 17 is provided on the right side to short-circuit the second contact. A movable contact 18 is provided. 19 is a spacer, and click spring 2 forms a spherical surface. 0 and the base film 15, and extends from the periphery to the center. A pressing portion 22 is formed at the tip. 23 is a stem that extends downward from the center of the bottom surface. The extending protrusion 24 is in contact with the top of the click spring 20. 25 is the housing A frame that is placed over the ring 10, and the stem 2 is inserted through the center hole 26 of the frame 25. 3 protrudes so that it can be moved upward and downward.

[0015] Next, the operation of the tact switch having the above configuration will be explained using Figs. 1 and 4. I will explain.

[0016] (A) in FIG. 4 shows the unpressed state of the stem 23, and the fixed contact outside the first contact 14a is in contact with the movable contact 17 on the left side of the base film 15, and the inner fixed The contact 12a and the left movable contact 17 face each other with a gap 27 interposed therebetween. The fixed contact 14b on the outside of the contact contacts the movable contact 18 on the right side of the base film 15. However, there is a gap 28 between the inner fixed contact 12b and the right movable contact 18. They are facing each other through.

[0017] When the protrusion of the stem 23 is pressed downward from this state, the click spring 20 is reversed. The top part presses the central pressing part 22 of the spacer 19 downward, and further presses the base plate. The insulating portion 16 at the center of the film 15 is also pressed downward. Along with this, base fill The arm 15 is bent downward as shown in FIG. The fixed contact 14a on the outside of the point turns on the fixed contact 12a on the inside, and at the same time, the movable contact 18, the outer fixed contact 14b of the second contact is turned ON to the inner fixed contact 12b. do.

[0018] Also, if you stop pressing the stem 23 from this state, the click spring 20 will reverse. Since the base film 15 returns to its original state as shown in FIG. , and the first and second contacts are turned OFF. In this way, the stem 23 Simultaneously turning on and off two circuits including the first and second contacts by operation I can do it.

[0019] According to the present invention, as described above, by operating the stem 23, two independent The circuit can be turned on and off at the same time, and the two possibilities that were previously required are eliminated. Since the moving contact member can be replaced with a single base film 15, the number of parts can be omitted. At the same time, the height of the tact switch body can be reduced. Also , the base film 15 covers the fixed contacts 12a, 12b, 14a, 14b. Therefore, the dustproof effect can be improved.

[0020] Note that it is possible to form two or more movable contacts on the base film 15. , multiple sets of fixed contacts are provided in the housing 10 corresponding to these multiple movable contacts. By operating the stem 23, a plurality of independent circuits can be turned on and off at the same time. Can be FF.

[0021] Further, in the above embodiment, the click spring 20 serving as the return spring for the stem 23 is Although it is used herein, it is not limited to this, and various modifications can be considered.

[0022]

[Effect of the idea]

The tact switch of this invention can turn on and off multiple independent circuits at the same time. In addition to reducing the number of parts, the height of the switch body can be kept low. Moreover, it has various effects such as improving the dustproof effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a tactile switch according to the present invention.

FIG. 2 is an exploded perspective view of the tactile switch of the present invention.

FIG. 3 is a plan view of the tact switch of the present invention with some parts removed.

FIG. 4 is an explanatory diagram of the operation of the tactile switch of the present invention.

FIG. 5 is an explanatory diagram of the operation of a conventional tact switch.

FIG. 6 is a circuit diagram of a conventional tact switch.

[Explanation of symbols]

10 Housing 12a Fixed contact 12b Fixed contact 14a Fixed contact 14b Fixed contact 15 Base film 17 Conductive part 18 Conductive part 20 Click spring (return spring)

Claims (1)

[Scope of utility model registration request] 1. A plurality of movable contacts are provided separately from each other on a base film made of an insulating material, at least two fixed contacts are provided on the housing side corresponding to each of the movable contacts, and one of the fixed contacts is provided on a housing side. is in constant contact with the movable contact, the other is opposed to the movable contact via a gap, and a return spring is interposed between the base film and a stem that presses the base film. .