JPS6231947Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a small push button switch, and particularly relates to an improvement of a plunger that is moved up and down by a push button.

Prior Art Conventionally, the tip of the plunger of this type of push-button switch has been formed into a smooth surface.

Problems to be Solved by the Invention However, since the rate of change in the switch mechanism with respect to the vertical movement of the plunger is uniform, there was a problem in that the switching moderation of the switch, that is, the switch operation feeling was poor.

The present invention was devised in view of the above-mentioned conventional circumstances, and therefore, the purpose of the present invention is to solve the above-mentioned problems inherent in the conventional technology, to provide an extremely good switch operation feeling, and to be compact and long. The object of the present invention is to provide a new small push button switch with a long life.

Means for Solving the Problems In order to achieve the above object, the small push button switch according to the present invention has a movable contact piece disposed opposite to the tip surface of the plunger, which is fixed by moving the plunger up and down. In a push button switch which opens and closes the switch by operating a switch mechanism consisting of a contact piece, an arm and an elastic piece, the end face of the plunger is an inclined surface, and a part of the inclined surface is provided with a step.

Embodiment of the Invention Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

Figures 1 to 3 show an embodiment of the present invention, of which Figure 1 is a central longitudinal sectional view, Figure 2 is an exploded perspective view, and Figures A, B, and C are main parts of the present invention. It is a diagram for explaining the operation.

In the figure, reference number 1 indicates a switch body, and the switch body 1 has a flange 1a formed on the upper side, and a screw 1b into which a nut 2 is screwed is cut in the outer periphery of the lower part following the flange 1a. . A switch sub-base 3 is inserted into the lower part of the main body 1 by a convex-concave connection between a protrusion 3a provided on the sub-main body 3 and a hole 1c formed in the main body 1. In this embodiment, two switch bases 4 are inserted in parallel inside the switch sub-base 3, and the protrusion 4a provided on the base 4 is removably inserted into the hole 3b formed in the sub-base 3 through a concave-convex connection relationship. ing.

The switch actuation mechanism of the present invention includes a contact piece and a movable contact piece of a so-called micro switch or switch block having a snap action, which are arranged in the vertical direction (the switch actuation direction is the horizontal direction). That is, an arm fulcrum 5a is provided on one side of the switch base 4, and an arm 5 is formed that swings about the fulcrum 5a. Further, a movable contact piece 6 is located approximately in the center of the switch base 4, and fixed contact pieces 7, 7 are spaced equally apart on both sides of the movable contact piece 6.
are implanted so that their lower ends protrude outward as terminals through the switch base 4 and the switch sub-base 3. The terminal portion of the fixed contact piece 7 is bent outward (i.e., along the lower surface of the switch base 4) with respect to the terminal portion of the movable contact piece 6, as best shown in FIGS. 3A and 3B. bent at almost a right angle),
It is further bent at a right angle at a slight distance so that it is parallel to the movable armature terminal section. Therefore, the distance between the movable contact piece terminal portion and the fixed contact piece terminal portion is increased. A curved elastic piece 8 is engaged between the upper part of the arm 5 and the upper part of the movable contact piece 6;
are connected, and due to the elastic pressure in one direction of the elastic piece 8,
The contact point of the movable contact piece 6 contacts the contact point of the fixed contact piece 7 to effect switching.
The switch base 4, arm 5, movable contact piece 6, fixed contact piece 7, and elastic piece 8 constitute a single switch mechanism.

A plunger 9, which is a main part of the present invention, is inserted into the upper part of the arm 5 so as to be movable up and down. The end surface of the plunger 9 facing the arm 5 is formed into an inclined surface, and a stepped portion 9b is further disposed on this inclined surface. The plunger 9 is arranged in the upper part of the hollow inner wall of the main body 1, and the plunger 9 is located at a position corresponding to the projection 3c holding the upper end of the lamp circuit terminal 10 arranged in the longitudinal direction on both sides of the switch sub-base 3. The interior of the main body 1 is held by a coil spring 11 mounted between the locking portion 9a provided therein, and is pressed into the hollow body 1 by pressing a button 13 attached to the upper part via a lamp holder 12. It is configured to slide on the wall surface. A light emitting body 14 such as a light emitting diode is inserted into the lamp holder 12,
Power for the light emitter 14 is supplied through the lamp circuit terminal 10 and the coil spring 11. That is, the coil spring 11 used here is the plunger 9.
is lowered by the downward movement of the button 13, and then the plunger 9 is moved upward and returned to its original position when the pressing force of the button is removed, and the electric circuit that supplies power to the light emitter 14 is activated. Some of them are also used.

During operation, when the button 13 is in the state shown in FIG. 3A, the button 13 is pressed, but at that time the plunger 9, which has an inclined surface formed at its bottom, moves downward, and as a result, the state shown in FIG. 3B As can be seen, at the same time that the inclined surface contacts the arm 5 and pushes the arm 5 to the right,
Due to the displacement and movement of the curved elastic piece 8, the movable contact piece 6 is rapidly reversed to the other fixed contact piece 7 (the left fixed contact piece in FIG. 3B), thereby opening and closing the switch. It is done. When the pressing force of the button 13 is removed, the plunger 9 is moved upward by the restoring force of the coil spring and returns to its original position, and as a result,
As seen in FIG. 3A, the movable contact piece 6 is separated from the left fixed contact piece 7, contacts the right fixed contact piece 7, and is returned to its home position.

By forming a hook-shaped or stepped portion 9b on the inclined surface of the plunger 9 near the switching position of the movable contact, as shown in Figs. 3A and 3B, when the switch is operated, the force required to operate the switch temporarily becomes heavy at an intermediate position, as shown in Fig. 3C, and then suddenly becomes light as the movable contact switches, resulting in an extremely light feel when operating the switch.

In the above embodiment, two microswitches are arranged in parallel, but the number may be one or three or more.

In addition, in this embodiment, a switch is described in which a threaded part for screwing a nut is provided on the outer periphery of the switch body, and the switch is tightened and fixed to a panel by the nut, but a spring plate is provided on the outside of the main body. It is also possible to use a one-touch type switch.

Effects of the invention The present invention is constructed and operates as described above.According to the invention, the switch base provided with the movable contact piece, the fixed contact piece, and furthermore the arm for actuating them can be moved in the vertical direction. The plunger, which is disposed on the switch body and has an inclined surface that operates the switch switching mechanism of the switch base, is also operated in the same direction, that is, in the vertical direction, and the inclined surface slides on the upper surface of the arm, and a step provided on the inclined surface is moved. When the value exceeds 1, the snap action is abrupt, resulting in an extremely good feel when operating the switch.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a central sectional view, FIG. 2 is an exploded perspective view, and FIGS. 3A, B, and C are explanatory views of the operation. DESCRIPTION OF SYMBOLS 1... Switch main body, 2... Nut, 3... Switch sub base, 4... Switch base, 5... Arm, 6... Movable contact piece, 7... Fixed contact piece, 8... Elastic piece, 9 ...Plunger, 9b...Stepped portion, 10
... Lamp circuit terminal, 11 ... Coil spring, 12
... Lamp holder, 13 ... Button, 14 ... Luminous body, 15 ... Heart cam, 16 ... Hanging pin, 1
7...Elastic plate.

Claims (1)

[Scope of utility model registration request] A switch sub-base removably inserted into one end of the switch body, at least one switch base removably inserted into the switch sub-base, and interlocked with a push button disposed at the other end of the switch body. The tip has an inclined surface, and the inclined surface has a plunger facing the arm described below, and a movable contact piece that also serves as a terminal and a plurality of fixed contact pieces are fixed in parallel to one end of the switch base, and the switch base A hole is formed at the other end, and a notch that is continuous with the hole and restricts the swinging range of the arm described below, and an end that serves as a fulcrum is fitted into the hole and extends upward through the notch. An elastic body is provided between the movable contact pieces in parallel with the arm, and a spring also serves as a part of an electric circuit for returning the plunger between one end of the sub base and the plunger, and The movable contact piece and the fixed contact piece are arranged so that the direction of contact operation between the fixed contact piece and the movable contact piece is substantially perpendicular to the operating direction of the plunger, and a stepped portion is provided on the inclined surface at the tip of the plunger. A small push button switch.