JPS5824356Y2 - push button switch - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a push button switch.

In general, there are two types of push-button switches: one in which an on button and an on-button for ON/OFF operations are both attached to the cover of a case, and the other in which they are both attached to a case.

If both the on button and the on button are attached to the cover (
(Refer to Japanese Utility Model Publication No. 51-7479), when the cover is removed, the opening/closing mechanism inside the case is exposed, making it extremely easy to connect the connecting wires introduced into the case.

However, with this configuration, it is not possible to check the position of the person (closed state of the open/close contact) with the cover removed, so it is necessary to check the contact pressure of the contact, the contact state, and the proper position of each part. The disadvantage is that it cannot be done.

This is because the on button is attached to the cover and removed from the case, making it impossible to press the on button and check the above conditions.

On the other hand, when both the on button and the on button are attached to the case, the configuration is as shown in FIG. 1.

The on button 1 and the on button 2 are each provided with legs IA and 2A that extend to a closed state holding and releasing mechanism (not shown) housed in the case 3 (see FIG. 5). is inserted between the tips of the fixed contact supports 4B and 5B to which the fixed contacts 4 and 5 are attached, respectively, and the leg 2
A passes through the hole 5A of the fixed contact support 5B.

At the ends of the fixed contact supports 4B and 5B, electric wires 6,
Terminal screws 8 and 9 are provided for connecting the terminals 7 to each other.

According to this configuration, since the on button remains on the case 3 side even if the cover 10 is removed, there is an advantage that various tests can be performed by pressing the on button.

However, remove the cover 10 and connect the electric wire 6.7 to the terminal screw 8,
When installing to fixed contact supports 4B and 5B from 9, press buttons 1,
2 will get in the way of the installation work to some extent.

In particular, in order to prevent the shaft of the screwdriver 11 from touching the screwdriver 2, the fixed contact support 5B must be made one dimension longer than the other fixed contact support 4B.

Therefore, two types of fixed contact supports are required.

Moreover, the dimensions of the case and cover are fixed contact support 4B,
With the middle of the tip of 5B as the boundary, one dimension is A, and the other dimension is A+α (however, α≧l), and the case and cover become larger by α.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a push button switch which combines the advantages of the two types of push button switches mentioned above and eliminates their disadvantages.

Next, an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 2 and 3, parts corresponding to those in FIG. 1 are given the same reference numerals.

In FIG. 2, a closed state holding and releasing mechanism 12 as shown in FIG. 5 is provided at the bottom of the case 3, and the leg 1A of the on button 1 is related to this.

A movable contact 13 is attached to the on button 1 via a spring 14 and a movable contact support 20. When the button 1 is pressed, the fixed contacts 4 and 5 are brought into conduction.

Holes 15, 16 are formed in the housing 3 in order to guide the electric wires 6, 7 connected to the terminal screws 8, 9 into the housing 3.

The switch 2 is attached to the cover 10 via a return spring 17, and in the example shown in FIG. 2, its lower surface 2B is attached to the fixed contact support 5B.
The return rod 18 is configured to be positioned opposite to the end surface of the return rod 18 extending to the closed state holding and release mechanism 12 without colliding with it.

When the cover 10 is lifted, the on button 1 slips through the hole 10A of the cover 10 and remains on the case 3 side, and the off button 2 can be removed together with the cover 10.

Figure 4 is a cross-sectional view taken along the line A-A in Figure 2, showing the lower surface 2 of the off type 2.
B is shown facing the return rod 18, 18 and attached to the cover 10 against the force of the return spring 17.

FIG. 5 shows a mechanism for holding and releasing the closed state, and this mechanism consists of a notch 1 formed at the lower end of the leg 1A of the on button 1.
B, a movable plate 21 that can move in a direction substantially perpendicular to the moving direction of the leg 1A, a spring 22 that biases the movable plate 21 toward the leg 1A, and a tip inclined surface formed on the movable plate 21. and a return rod 18 that can be fitted into the hole 12A.

In the position shown in the figure, the tip of the movable plate 21 is engaged with the notch 1B, but before the on button 1 is pressed, the leg 1A is a little higher, so the tip of the movable plate 21 is engaged with the notch 1B. The agreement is off.

In the example shown in FIG. 5, the return rod 18 is formed integrally with the off-set type 2, but as shown in FIG.
may be separated.

In any case, the return rod 18 is preferably placed at a position somewhat apart from the side line of the fixed contact support 5B.

To explain how this mechanism works, when the on button 1 is pressed, the leg 1A moves downward, and the movable plate 2 is moved by the biasing force of the spring 22.
1 engages with the notch 1B.

This maintains the closed state.

When the switch 2 is pressed, the return rod 18 moves downward, and its tip end slope enters the hole 12A of the movable plate 21 to move the movable plate 21 to the left in the figure.

As a result, the notch 1B and the tip of the movable plate 21 are disengaged, and the on button returns to its original state.

That is, the closed state is released.

As described above, the push button switch according to the present invention, in which the on button is placed in the center of the movable contact support and attached to the case, and the off button is placed covering one terminal screw of the fixed contact support and attached to the cover, is as follows. It has the advantages of

■When the cover is removed, the only button left on the case side is the ON button, so it does not get in the way of wire connection work, etc.

■Even if the cover is removed, the on button remains on the case side, so you can press this button to check whether the contacts are on or off or perform other tests.

■One dimension shown in Figure 1 is unnecessary, so fixed contact support 4B,
Tie 5B to the same length.

Moreover, since the fixed contact support 5B is not provided with the hole 5A as shown in FIG. 1, the fixed contact supports 4B and 5B can be made of the same component.

(2) In connection with the above item, the length dimensions of the case and cover can be made shorter than those in FIG.

As described above, the present invention can combine the advantages of the two conventional types of push button switches.

It is clear that the disadvantages of the conventional one have been eliminated.

Note that ■ is a unique advantage of the present invention.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a conventional push button switch, Fig. 2 is a longitudinal sectional view of a push button switch according to the invention, Fig. 3 is a perspective view of a cover of the push button switch according to the invention, and Fig. 4 is a longitudinal sectional view of a push button switch according to the invention. 2 is a sectional view taken along the line A-A in FIG. 2, and FIG. 5 is a sectional view of the main parts of the push button switch according to the present invention. 1 is the on button, 2 is the off type, 3 is the case, 4 and 5 are fixed contacts, 4B and 5B are fixed contact supports, 6 and 7 are electric wires, 8 and 9
10 is a terminal screw, 10 is a cover, 13 is a movable contact, 18 is a return rod, and 20 is a movable contact support.

Claims (1)

[Scope of utility model registration request] A pair of fixed contact supports and a movable contact support bridging the fixed contact supports are arranged in a straight line, and by pressing an on button, opposing contacts of each contact support are maintained in a closed state; In a push button switch in which the closed state of the contact is released by pushing in the on button, the on button is disposed in the center of the movable contact support and is supported integrally with the case, and the on button is placed at one side of the fixed contact support. A push-button switch is characterized in that it is arranged to cover terminal screws and is supported integrally with a cover.