JPS6033544Y2 - push button switch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a single-action type push button switch that is locked in the pressed position, and in particular, a support mechanism for a lock pin that engages with a bar-shaped lock groove formed in a slider in a case. This invention relates to an improved push button switch.

In general, a single-action type push button switch has an insulating plate 1a fixed to the top of a case 1, as shown in FIG. 1 (longitudinal sectional view).
Fixed contacts 2ay2b and 2C are fixedly installed on the slider 3, and a movable contact 4 is provided on a slider 3 that is slidably provided inside the case 1.

The slider 3 is made of an insulating material, and integrally has an operating arm 3a projecting outward from the case 1 at one end.

Then, by the spring 5 mounted on the operating arm 3a,
The slider 3 is biased in the direction of protruding the operating arm 3a, that is, in the direction of arrow X.

Further, a bar-shaped lock groove 3b as shown in FIG. 3 is formed on one side of the slider 3. As shown in FIG.

On the other hand, a support member 6 provided at the bottom of the case 1 rotatably supports one end 7a of a U-shaped lock pin 7, and the other end 7b of this lock pin 7 is inserted into the lock groove 3b. It has become so.

In this push button switch, the operating arm 3a is connected to the spring 5
When the lock pin 7 is protruding in the direction of the arrow X due to the force, the end 7b of the lock pin 7 is at the position
(See Figure 3).

At this time, the movable contact 4 is in contact with the fixed contacts 2a and 2b.

Next, when the operating arm 3a is pushed in the direction of arrow Y, the end 7b of the lock pin 7 moves within the lock groove 3b.

When the slider 3 moves to the inner part of the case 1, the end portion 7b moves to the y position within the lock groove 3b.

In this state, even if the pushing force on the operating arm 3a is removed, the slider is locked at that position.

At this time, the movable contact 4 contacts the fixed contacts 2b and 2c.

Next, when the operating arm 3a is pushed again in the direction of the arrow Y, the end 7b of the lock pin 7 is removed from the position y in the tank groove 3b.

As a result, the slider 3 returns to the state shown in FIG. 1 in the direction of arrow X due to the elastic force of the spring 5.

The pin support member 6 in the conventional push button switch is formed by bending a plate material, as shown in FIG.
The end portion 7a is rotatably inserted and supported.

Further, a presser spring piece 6b is integrally bent at a position opposite to the support hole 6a, and the other end 7b of the lock pin 7 is supported by this presser spring piece 6b. 7b is pressed into the lock groove 3b.

When assembling the push button switch, the lock pin 7 is attached to the pin support member 6, and then the pin support member 6 is attached to the case 1.
It is worn inside.

However, in the conventional structure of the pin support member 6, if the gap between the end 7a of the lock pin 7 and the support hole 6a is large, the lock pin 7 may fall off when the pin support member 6 is installed into the case 1. This may complicate assembly work.

Conversely, if the support hole 6a is made small in diameter and the gap between it and the end 7a is made small, it becomes difficult to rotate the lock pin 7 within the support hole 6a.

Therefore, in the past, there was a drawback that machining work to maintain constant diametrical accuracy of the support hole 6a required time and increased component prices.

The present invention solves the drawbacks of the lock pin support mechanism in conventional push button switches, and provides a push button switch in which the lock pin is reliably supported by the pin support member and the lock pin does not fall off during assembly work. It is intended to.

In the present invention, a pin support member is provided with a support surface and a presser spring extending at a position corresponding to the support surface, and a gap is formed at one end of the opposing portion between the presser spring and the support surface. Insert one end into a support hole formed in the support surface, rotate the lock pin using the support hole 6a as a fulcrum, and insert a part of the lock pin through the gap between the support surface and the presser spring. This makes it easy to attach the lock pin, and the lock pin is held between the support surface and the presser spring to prevent the lock pin from falling off when the pin support member is attached to the switch body. It is something to do.

Embodiments of the present invention will be described below with reference to FIG. 4 and subsequent drawings.

FIG. 4 shows the pin support member 11, which is a feature of the present invention, in a front view A1, a top view B1, and a side view C.
The figure shows the pin support member 11 in a perspective view.

The pin support member 11 is formed by bending a thin plate material having spring properties, such as a phosphor bronze plate, into a U-shaped cross section.

The upper bent portion of the pin support member 11 serves as a support surface 11a, and a support hole 11b is bored in this support surface 11a.

Further, a presser spring llc is integrally formed on the lower bent portion, and its tip portion 11d lightly contacts the support surface 11a.

This distal end portion lid is provided with an oblique bent portion 11e, and as a result, this distal end portion 11d and the support surface 11a are in contact at one end α, and a gap is created at the other end β. (See Figure 4C).

Next, the assembly work of a push button switch using the pin support member 11 having the above structure will be explained.

First, the lock pin 7 bent into a U-shape is attached to the pin support member 11.

This work is carried out with the presser spring l as shown by the chain line in Fig. 5.
Insert the end 7a of the lock pin 7 into the support hole 11b at a position away from the lc.

Then, the lock pin 7 is rotated horizontally using the end portion 7a as a fulcrum, and the linear portion of the lock pin 7 is held between the presser spring llc and the support surface 11a.

As mentioned above, the tip end lid of the presser spring llc and the support surface 1
1a, a gap is formed at one end β, so when the lock pin 7 is rotated from the chain line state to the solid line state, the straight part of the lock pin 7 is between the tip end 11d and the support surface 1.
1a can be smoothly intervened.

Next, the work of installing the pin support member 11 with the lock pin 7 attached into the case 1 is shown in FIGS. 6A and 6B.

This will be explained by C.

This case 1 is formed by bending a metal plate into a bottom shape, and has locking pieces 1c bent and formed on both sides of the front opening 1b, and a notch 1d at the lower part of the locking piece 1C. is formed.

The pin support member 11 is inserted into the case 1 through the notch 1d with the bent portion serving as the support surface 11a facing upward (Figures A and B).

After completely inserting the pin support member 1 into the case 1,
1 to the inner bottom of case 1 (Figure 0).

In this state, both ends 7a and 7b of the lock pin 7 attached to the pin support member 11 are directed upward into the case 1.

Further, the pin support member 11 is surrounded on three sides by the side plates of the case 1, and touches the lower side of the locking piece IC at the front opening.
Since they are in contact with each other, the pin support member 11 will not come out from inside the case 1.

Note that, since the lock pin 7 attached to the pin support member 11 is held between the support surface 11a and the presser spring llc, in the work of installing the pin support member 11 into the case 1, the lock pin 7 is attached to the pin support member 11. There is no need to worry about it being removed.

After attaching the support member 11 as described above, the slider 3 is inserted into the case 1 (see FIG. 7).

This slider 3 connects the operating arm 3a to the front opening 1 of the case 1.
b, and further insert the spring 5 around the outer periphery of the operating arm 3a.

Further, a stopper 12 is fitted to the tip of the operating arm 3a, and the spring 5 is connected to the stopper 12 and the locking piece IC of the case 1.
Interpose between.

Note that when the slider 3 is inserted into the case 1, the end portion 7b of the lock pin 7 is inserted into the bar-shaped lock groove 3b (same as shown in FIG. 3) formed on the bottom surface of the slider 3. Align.

Further, in this embodiment, the other end 7a of the lock pin 7 also protrudes upward like the lock pin 7, so an escape groove (not shown) for this end 7a is formed on the lower surface of the slider 3. .

Furthermore, the movable contact 4 is fitted into the fitting groove 3C formed on the upper surface of the slider 3.

Furthermore, fixed contacts 2a, 2b, 2c are provided on the upper side of the case 1.
An insulating plate 1a having a shape is attached, and a claw 1e provided at the upper end of the case 1 is bent to fix this insulating plate 1a.

The operation of the push button switch assembled in this way is similar to that explained in FIGS.
The slider 3 is locked when pushed in the direction of the arrow Y, and when the operating arm 3a is further pushed in the direction of the arrow Y from that position, the lock is released and the slider 3 returns to the direction of the arrow X.

This operation is affected by the movement of the end 7b of the first locking pin 7 along the inside of the lock groove 3b, but since the pressing force of the locking pin 7 by the pressing spring llc is light, the locking pin 7 is pushed against the end 7a. The rotation operation using the support is performed smoothly as in the conventional case.

As described above, according to the present invention, the pin support member supporting one end of the lock pin is provided with a support surface and a presser spring extending to a position opposite to the support surface, and the lock pin is locked by the presser spring and the support surface. Since the pin is clamped, the lock pin will not fall off from the pin support member when the pin support member is installed in the case during assembly work.

Therefore, the assembly work becomes easier than before.

In addition, even if a gap is created between the support hole drilled in the pin support member and the end of the lock pin, it will not cause the lock pin to fall off, so the dimensional accuracy of the support hole can be made rough. Processing time can be shortened.

Furthermore, since a gap is formed at one end of the opposing part between the presser spring and the support surface, when attaching the lock pin to the pin support member, one end of the lock pin must be inserted into the support hole on the support surface. If the lock pin is rotated using the part as a fulcrum, the lock pin can be easily held between the support surface and the presser spring through the above-mentioned gap, and the work of installing the lock pin is facilitated.

Further, as described in claim (2), if the pin support member and the presser spring are integrally formed by sheet metal molding, the number of parts can be reduced, and costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view showing a conventional push button switch, Fig. 2 is a perspective view showing a conventional pin support member, Fig. 3 is a bottom view of a slider showing a locking groove, and Fig. 4 and subsequent figures are implementations of the present invention. 4A is a front view of the pin support member according to the present invention, FIG. 4B is a plan view, FIG. 4C is a side view, and FIG. The installation is a perspective view showing the work; Figures 6A, B, and C are perspective views showing the work of installing the pin support member to the case; Figure 7 is an exploded view showing the installation status of parts such as the slider and insulating plate. FIG. 1... Case, 1a... Insulating plate, 2a
, 2b. 2c...Fixed contact, 3...Slider,
3a...Operating arm, 3b...Bart-shaped locking groove, 4...Movable contact, 5...
Spring, 7...Lock pin, 7a, 7b.
...End part, 11...In support member, 11a
...Supporting surface, llb...Supporting hole, li
e...Pressure spring, 11d...Tip of the presser spring, α000 Gap between the supporting surface and the opposing portion of the presser spring.

Claims (2)

[Scope of utility model registration request] (1) A slider having an operating arm is slidably housed in a case equipped with a fixed contact, and a spring biases the slider in a direction in which the operating arm protrudes from the case. A movable contact for sliding contact is fixed, and a bar-shaped lock groove is formed on one side of the slider.On the other hand, one end of a U-shaped lock pin is rotatably supported in the case, and this lock In the push button switch, the other end of the pin is inserted into the lock groove, a pin support member is provided inside the case, and one end of the lock pin is rotatably supported on the support surface of the pin support member. a support hole is formed in the pin support member, and a presser spring is provided in the pin support member and extends to a position opposite to the support surface, and a gap is formed at one end of the opposing portion between the presser spring and the support surface,
A push button switch characterized in that a lock pin is held between the support surface and the presser spring. (2) The push-button switch according to claim 1, wherein the pin support member is formed from an elastic thin plate material, and the presser spring is formed from a part of the pin support member.