JPH0241801Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention controls the displacement of a movable contact of a switch member having a fixed contact and a movable contact in conjunction with the sliding displacement of a push button member held in a frame, thereby opening and closing a switch. This invention relates to a push button switch that performs the following functions.

This type of push button switch is known, for example, from Patent Application No. 171862 "Push Button Switch" previously filed by the applicant of the present invention.

The push-button switch disclosed in Patent Application No. 171862 filed in 1982 includes a frame body, a switch part consisting of a fixed contact at a side plate of the frame and a movable contact disposed close to and spaced from the frame body. It has locking parts provided on both sides of the switch part of the frame body or in the vicinity thereof, and arm parts extending from both ends of the winding part at a predetermined angle from each other, and the tips of the square arm parts. a coil member that is locked to the locking portion so as not to be displaced; and a push button member that is biased upward by the winding portion of the coil member that is arranged above the coil member so as to be movable up and down. Therefore, when the push button member is pushed against the coil member, a predetermined portion of the push button member comes into contact with and separates from the movable contact of the switch portion to close and open the switch portion. It is something.

However, in this push button switch, arms extending at a predetermined angle are provided at both ends of the winding portion of the coil member, and the ends of the arms are locked in the locking portion of the frame. However, by providing arms at both ends of the winding portion of the coil member, the cost of the coil member increases, and when forming the arm portions, the predetermined The problem is that the angle is easily deformed due to manufacturing errors or handling, and the accuracy is also likely to vary.

The present invention has been devised in view of the problems of the conventional push button switch, and more specifically, it does not require an arm extending from the end of the coil member that displaces the push button member upward. It is an object of the present invention to provide a push button switch that is low in cost, has stable accuracy, and is easy to assemble by having a structure that allows the use of a very general coil member with a flat end face. purpose.

Hereinafter, one embodiment of the push button switch according to the present invention will be described in detail with reference to the drawings.

Fig. 1 is an external perspective view of a push button switch according to the present invention, Fig. 2 is an exploded perspective view of the push button switch shown in Fig. 1, and Fig. 3 is an exploded perspective view of the push button switch shown in Fig. 1.
FIG. 3 is a vertical cross-sectional view taken along line B'. FIG. 4 is a longitudinal sectional view taken along line AA' in FIG. 1.

In FIGS. 1 to 4, the push button switch includes a frame 1, a push button member 2, a switch member 3, a cover 4, and a coil member 5.

The frame body 1 has a first storage section 1A and a second storage section 1B, in which the push button member 2 is slidably disposed, each having an open end, which are integrally molded from a synthetic resin material. The first storage section 1A and the second storage section 1B
and are separated by a partition wall 1C, and the partition wall 1C is provided with a notch portion 1D that is continuous from the opening. The first storage portion 1A is provided with a cutout recess 1G that is continuous from the opening on the inner wall surface facing the partition wall 1C, and a protrusion acting portion 6 at the bottom. It is formed in a saddle shape with a flange-like portion 6A at both ends and a concave spherical groove 6B continuous on the outer periphery between the flange-like portions 6A, 6A. In addition, a partition wall 1 is provided in the second storage portion 1B.
A notched recess 1E provided continuously from the opening on the inner wall surface facing C, and a slit 1f ₁ provided continuously from the opening so as to communicate from the inside to the outside of the second storage portion 1B. , is provided continuously with the slot 1f ₁ on the lower side of the slot 1f ₁ and is formed along the outer side of the frame 1 without communicating with the inside of the second storage section 1B. This is a slotted part that is integrally formed with the slotted part _1f2 .

Further, on the outer surface of the frame 1, a leg guide recess 1H and a protrusion 1J protruding from the bottom of the leg guide recess 1H so as to cross the leg guide recess 1H;
A pair of protective wall plates 1K are provided extending substantially parallel to the bottom from both side walls of the leg guide recess 1H.

Next, the switch member 3 stored in the second storage part 1B of the frame body 1 is attached to a holding body 9 formed by molding a fixed contact piece 7 and a movable contact piece 8 into a substantially U-shape from a synthetic resin material.
At the time of molding, it is molded integrally with the holding body 9, and an elastic control plate 10 is further fixed to one side of the holding body 9. Furthermore, the fixed contact piece 7 and the movable contact piece 8 are the contact point 7.
A and 8A are arranged in combination in such a manner that their tips are overlapped with each other in a state where they are always in contact with each other.

The control plate 10 also has an elastically slidable control piece 10A extending across the movable contact piece 8.
is provided, the tip 10a of which is bent toward the movable contact piece 8, and an abutment member 11 that comes into contact with the movable contact piece 8 is provided. This switch member 3 normally has a fixed contact 7A and a movable contact 8A.
The control piece 10A is in a closed state in contact with the movable contact piece 8, and the control piece 10A is elastically displaced toward the movable contact piece 8, and the fixed contact 7A is pressed against the movable contact piece 8 via the contact member 11. The switch member 3 is configured so that the switch member 3 and the movable contact 8A are in an open state where
The holding body 9 is disposed in the second housing portion 1B, and the terminal portions 7B and 8B of the fixed contact piece 7 and the movable contact piece 8 extend below the frame body 1 through the slot 1F. Installed. The control piece 10A of the switch member 3 attached in this manner is disposed at a position corresponding to the notch 1D of the partition wall 1C.

Further, the push button member 2 stored in the first storage portion 1A of the frame 1 is composed of a main body portion 2A and a knob portion 2B that is connected to the main body portion 2A with a stepped portion 2E. , a first storage section 1 is provided on the outer surface of the main body section 2A.
A protruding part 2C that is slidably engaged with a notch 1G provided in A, and a protruding cam part 2D that is slidably engaged with a notch 1D of the partition wall 1C are provided. 2D has a tapered surface 2d formed so that the height gradually decreases toward the bottom. Further, the main body portion 2A has a hollow portion 2F that is open at the bottom, and the hollow portion 2F has a pair of opposing surfaces that narrow in distance from each other toward the inner part, and is formed into an approximately "8" shape in cross section. The recess 2J is formed by providing a stepped portion 2H above the inclined surface 2G, and a protruding pin 2K is provided on each of the inclined surfaces 2G. In the push button member 2 formed in this way, the coil member 5 is compressed and both ends thereof are respectively locked between a pair of inclined surfaces.
A projecting pin 2K provided at the coil member 5 is inserted to prevent the coil member 5 from falling off, and the end face of the coil member 5 is abutted and locked in a state in which it is in surface contact with the inclined surface 2G. This slope 2
The coil member 5 disposed between G is in a downwardly curved state due to the inclination action of the inclined surface 2G.

Then, a push button member 2 provided with this coil member 5
When the push button member 2 is stored in the first storage portion 1A, the curved tip portion of the downwardly curved coil member 5 is placed in contact with the groove 6B of the protruding action portion 6 of the frame 1, and the push button member 2 is When pressed further downward, the elastic deflection of the coil member 5 exerts an urging force to move the push button member 2 upward.

The cover 4 has a push button member 2 inserted into the first storage part 1A of the frame body 1 and a switch member 3 inserted into the second storage part 1B, respectively.
In order to prevent it from slipping out from inside 1B, it is arranged so as to cover the first storage section 1A and the second storage section 1B. and the cover 4 is
A main body portion 4A that covers the storage portion 1A and the second storage portion 1B, and a pair of leg portions 4B that are bent from the ends of the main body portion 4A in a substantially perpendicular direction are provided. The main body portion 4A covers the entire opening of the second storage portion 1B, and the protrusion of the knob portion 2B of the push button member 2 inserted into the first storage portion 1A at a position corresponding to the first storage portion 1A. The opening 4C is provided with a projecting portion 4D that abuts the stepped portion 2E of the push button member 2 and prevents the push button member 2 from being pulled out. Also, a pair of legs 4
B is the protective wall plate 1 in the leg guide recess 1H of the frame 1.
K, and when inserted into a predetermined position, it abuts and locks on the protrusion 1J of the frame 1, and is provided to prevent the leg 4B from slipping out. The retaining claw 4b is bent inward, and the leg 4B has a mounting leg 4C protruding outward in a substantially half-moon shape, which is used for attaching to a device board, etc., at the tip of the leg 4B. It is being

The operation of the push button switch constructed in this way will now be explained. In the state shown in FIGS. 3 and 4, the push button member 2 is displaced upward under the force of the coil member 5, and the main body of the cover 4 The stepped portion 2E is brought into contact with and positioned in the portion 4A. In this state, the control piece 10A and the protruding cam 2D of the push button member 2 are separated, and the fixed contact 7A and the movable contact 8A are in contact with each other, so that the switch member 3 is in the closed state.

Next, when the push button member 2 is pressed against the biasing force of the coil member 5, the control piece 10A is pushed and displaced toward the switch member 3 by the protruding cam 2D of the push button member 2. By displacing the control piece 10A toward the switch member 3, the movable contact piece 8 also moves to the fixed contact via the contact member 11 fixed to the control piece 10A that is in contact with the movable contact piece 8. 7, the fixed contact 7A and the movable contact 8A are separated and the switch member 3 is in an open state.

In this state, the coil member 5 is shown in FIG.
The coil member 5 is bent and held in the state shown by the one-dot chain line, and a part of the coil member 5 comes into contact with the stepped part 2H of the hollow part 2F of the push button member 2, and that part becomes an operating pivot point.

Then, when the downward pressing force on the push button member 2 is released, the coil member 5 returns to the state shown by the solid line in FIG. When the contact point 8A comes into contact with the switch member 3, the switch member 3 is in a closed state.

As explained above, the push button switch according to the present invention controls the displacement of the movable contact of the switch member having a fixed contact and a movable contact in conjunction with the sliding displacement of the push button member held in the frame. In a push-button switch for opening and closing a switch, between a pair of locking surfaces disposed opposite to each other at the lower part of the push-button member along a plane orthogonal to the sliding direction of the push-button member;
A coil member that has been compressed in advance and is bent downward is disposed integrally with the push button member by having its end face crimped to the locking surface portion, and a protruding action that is brought into contact with the lower part of the bending side of the coil member. part in the case,
Further, each of the pair of locking surface portions is formed of an inclined surface having a substantially "C" shape, and a protrusion is provided on the inclined surface to be inserted and locked into the end face opening of the coil member. Therefore, since the coil member does not require an arm at the end, an inexpensive coil member can be used, so the cost is low, and
A push button switch with stable accuracy can be obtained.

Furthermore, by forming the pair of locking surfaces of the push-button switch according to the present invention with inclined surfaces each forming an approximately "8" shape, the coil member can be easily pressed in a downwardly curved state. By providing a protrusion that can be attached to the member and that can be inserted into the end of the coil member and lock the coil member on the locking surface, the coil member can be prevented from falling off and assembly work can be facilitated. be able to.

In addition, by forming the protrusion acting part to which the coil member comes into contact in a saddle shape with a groove for receiving a portion of the coil, it is possible to prevent the coil member from falling off from the protrusion action part, thereby improving reliability. .

Furthermore, by providing a stepped portion at a position above the inclined surface, the step portion serves as a pivot point for both ends of the coil member when the coil member is displaced from a downwardly deflected state to an upwardly deflected state. Thus, the coil member can be reliably displaced from the upwardly bent state to the downwardly bent state.

It has the following beneficial effects.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a push button switch according to the present invention, Fig. 2 is an exploded perspective view of the push button switch shown in Fig. 1, and Fig. 3 is an exploded perspective view of the push button switch shown in Fig. 1.
A vertical cross-sectional view taken along line B', Figure 4 is
FIG. 3 is a vertical cross-sectional view taken along line A-A' in the figure. 1...Frame body, 2...Push button member, 3...Switch member,
5... Coil member, 6... Projection action part, 2G... Locking surface part (slanted surface), 2K... Projection pin (protrusion), 2H... Step part, 6B... Groove, 7A... Fixed contact, 8A... Movable contact.

Claims (1)

[Claims for Utility Model Registration] (1) A switch member that has a fixed contact and a movable contact and controls the displacement of the movable contact in conjunction with the sliding displacement of a push button member held in a frame. In a push-button switch configured to open and close, a pair of locking surfaces disposed opposite to each other at the lower part of the push-button member along a plane perpendicular to the sliding direction of the push-button member is compressed in advance; , a downwardly bent coil member is integrally disposed with the push button member by crimping the end portion to the locking surface portion, and the protruding acting portion that is in contact with the lower portion of the bending side of the coil member is attached to the frame. Further, each of the pair of locking surface portions is formed of an inclined surface having a substantially "C" shape, and a protrusion that is inserted and locked into the end opening of the coil member is provided on the sloped surface. A push button switch characterized by being provided with a push button. (2) Practical use in which step portions are provided above the inclined surface to serve as pivot points for both ends of the coil member when the coil member is displaced from a downwardly deflected state to an upwardly deflected state. Scope of patent registration request No. 1
The push button switch described in section. (3) The push-button switch according to claims 1 and 2, wherein the protruding acting portion is formed in a saddle shape having a groove for receiving the abutting portion of the coil member.