JPS5824344Y2 - push button switch - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a pushbutton switch.

In a conventional pushbutton switch, an operating shaft constituting a pushbutton is inserted into a notch in a frame so as to be able to move up and down, and an E. A cylindrical coil spring is fitted between the ring and the like, and when the operating shaft is pressed against the biasing force of the coil spring, the other end of the operating shaft opens and closes the switch means as appropriate.

However, in the above conventional push button switch, since the coil spring is configured in a cylindrical shape, it is necessary to lock the coil spring to the operating shaft with an E-ring or the like after inserting the coil spring into the operating shaft. In addition, it has the disadvantage that the installation work is complicated.

Further, there is a drawback that the end of the coil spring may fit between the operating shaft and the notch, making it impossible to operate the operating shaft.

This invention was made in view of the above-mentioned drawbacks, and its purpose is to provide a pushbutton switch in which a coil spring can be attached to a pushbutton with simple work, and the pushbutton can be operated reliably. It is something.

This invention will be explained in detail below with reference to embodiments shown in the drawings.

1 and 2 show an alternate type push button switch, which generally includes a frame 1, an operating shaft 2 constituting the push button, a roughly U-shaped guide wall 3 that guides the operating shaft 2, It consists of two microswitches 4 and 5 that are opened and closed by operating this operating shaft 2.

The frame 1 is bent into an abbreviated shape and has a top surface 1a and a side surface 1b.
On the other hand, a notch 6 having a constant width in the longitudinal direction is formed in the center of the upper surface 1a, and an upright piece 7 is formed in the side surface 1b at a position corresponding to the upper notch 6.
However, a generally rectangular notch 8 is formed on the lower side of the upright piece 7.

The shaft portion 2a of the operation shaft 2 has a hook portion 2b at the top and a shaft portion 2a at the bottom, forming a roughly T-shape, and an arcuate surface 2C.
The actuating shafts 2d are integrally formed, and the shaft portion 2a is placed in the notch 6 so that the collar portion 2b is located above the upper surface 1a of the frame 1, and the actuating shaft 2d is placed in the notch 8. It is inserted from the side inside.

A guide wall 3 is fixed so as to be positioned between the upright piece 7 and the notch 8 on the side surface 1a of the frame 1 so as to surround the shaft portion 2a of the operating shaft 2 from the side; A rectangular guide plate 9 at the bottom of the guide wall 3 is located between the operating shaft 2d of the operating shaft 2 and the side of the notch 8 of the frame 1.

Therefore, the shaft portion 2a of the operating shaft 2 can move up and down along the guide wall 3, and the surface of the operating shaft 2d opposite to the arcuate surface 2C can move up and down along the guide plate 9.

The shaft portion 2a of the operating shaft 2 includes a collar portion 2b and a frame 1.
A conical coil spring 10 is fitted between the upper surface 1a and the upper surface 1a.

The small diameter portion 10a of this coil spring 10 has a diameter slightly smaller than the outer diameter of the flange portion 2b, and is pressed into contact with the collar portion 2b from below.

On the other hand, the large diameter portion 10b has a larger diameter than the outer diameter of the collar portion 2b, and surrounds the upright piece 7 of the frame 1 and the upper protruding piece 3a of the guide wall 3, and is attached to the upper surface 1a of the frame 1. Pressed from above, the operating shaft 2 is biased upward in FIG. 2 by a coil spring 10.

The microswitches 4 and 5 are arranged on both sides of the side surface 1b of the frame 1, and the through holes 11 of the microswitches 4 and 5 are arranged on both sides of the side surface 1b of the frame 1.
．． The push buttons 4 a and 5 a are opposed to the guide plate 9 in parallel with the frame 1 via the insulating plates 15 and 16 .

When the operating shaft 2 is in a non-operating state, the push buttons 4a and 5a of the microswitches 4 and 5 are located below the circular arc surface 2C of the operating shaft 2d of the operating shaft 2.

On the other hand, a cam groove 18 is formed at a certain position on the back surface of the shaft portion 2a of the operating shaft 2, and one end 20a of the hook pin 20 is guided into a guide groove 19 provided at the upper part of the cam groove 18. It is inserted through a hole 3b of a projecting piece 3a of the wall 3 so as to be relatively movable up and down.

The other end 20b of this hook pin 20 is attached to the guide wall 3.
It is inserted into the cam groove 18 through the window 3C.

Note that one end 20a of the hook pin 20 is surrounded by the large diameter portion of the coil spring 10, and is prevented from being pulled out together with the other end 20b.

The cam groove 18 is carved in a substantially heart shape, and on the left side in FIG. A stepped portion 22 and an inclined surface 23 are formed on the right side so that the groove depth becomes gradually shallower from the bottom to the top.

Furthermore, depressed step portions 24 and 25 are formed at the top portion from the inclined surface 23 to the inclined surface 21, respectively.

In the above configuration, in order to fit the coil spring 10 onto the operating shaft 2 after the operating shaft 2 is attached to the frame 1 using the guide wall 3, for example, the large diameter portion 10b of the coil spring 10 must be inserted into the operating shaft 2. By inserting the coil spring 10 from above the flange 2b while rotating it, for example, when the small diameter portion 10a of the coil spring 10 reaches the flange 2b, it is appropriately pushed out and easily passes through the flange 2b.

Therefore, the coil spring 10 is placed between the upper surface of the frame 1 and the collar portion 2b, and the upright piece 7 and the protruding piece 3 of the guide wall 3
It can be fitted so as to surround a.

In this case, the large diameter portion 10b of the Corui spring 10 is connected to the upright piece 7.
Since lateral movement is prevented by the projection piece 3a of the guide wall 3, the coil spring 1 is inserted into the gap between the frame 1 and the operating shaft 2.
0 can be prevented from getting stuck.

When the operating shaft 2 is pushed in against the biasing force of the coil spring 10, the push buttons 4a and 5a of the microswitches 4 and 5 are pressed by the arcuate surface 2C of the operating shaft 2.

At the same time, one end 20 a of the hook pin 20 slides in the guide groove 19 of the operating shaft 2 , and the other end 20 b slides on the inclined surface 23 of the cam groove 18 to adjust the position of the depressed step 25 . reaches and engages with the operating shaft 2.

As a result, the operating shaft 2 is held in the push-in position as shown in FIG.
a and 5a are held in a pressed state.

In the above case, the large diameter portion 10 b of the coil spring 10
is larger than the notch 6 on the upper surface 1a of the frame 1, so the coil spring 10 should not fit into the gap between the operating shaft 2 and the notch 6, making it impossible to operate the operating shaft 2. There isn't.

Moreover, since the surface of the operating shaft 2d of the operating shaft 2 opposite to the circular arc surface 2C is regulated by the guide plate 9, the operating shaft 2d
The distance between the arcuate surface 2C of d and the microswitches 4 and 5 can be maintained accurately, and the pushbuttons 4a and 5a can be reliably operated at predetermined positions.

Then, when the operating shaft 2 is pushed further, the hook pin 20
When the other end 20b and the operating shaft 2 are disengaged and the pressing force on the operating shaft 2 is released, the operating shaft 2 returns to its original position and the push buttons 4a and 5a of the microswitches 4 and 5 are activated. While returning to the original state, the other end 20b of the hook pin 20
slides on the inclined surface 21 and is located at the depressed step portion 22.

As described above, according to this invention, a flange portion of a predetermined size is integrally formed on the operation shaft constituting the push button, and a flange portion having an outer diameter of the flange portion is formed between the flange portion and the frame. Since a conical coil spring having a smaller diameter at one end and a larger diameter at the other end is fitted, the coil spring can be inserted from the large diameter side of the other end into the above-mentioned collar while rotating. By inserting the coil spring, it is possible to fit the coil spring between the collar and the frame with a simple operation without using a separate member so that one end of the coil spring is in pressure contact with the collar and the other end is in pressure contact with the frame. This can improve work efficiency.

In addition, the other end of the coil spring has a large diameter, and this part contacts the frame, and an upright piece and a protruding piece are located inside it to position the coil spring, so that the coil spring can be connected to the frame and the operating shaft. This will surely prevent the operation shaft from getting stuck in the gap and becoming impossible to operate.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the configuration of an embodiment of this invention;
FIG. 2 is a side view of the embodiment shown in FIG. 1, and FIG. 3 is an explanatory diagram of the operation. 1...Frame, 2...Operation axis, 2b
...Brim portion, 3...Guide wall, 4,5
...Micro switch, 10...Coil spring.

Claims (1)

[Scope of utility model registration request] An operating shaft constituting a push button is displaced with respect to a frame against the biasing force of a spring fitted to the operating shaft to open and close the switch means as appropriate,
The operating shaft is an integrally molded product with a flange, and the frame is provided with a notch into which the shaft of the operating shaft fits, an upright piece on the side thereof, and a protruding piece on the top for operation. A guide wall is provided that surrounds the shaft portion of the shaft from the side facing the upper upright piece, and a conical coil spring having one end with a smaller diameter and the other end with a larger diameter than the outside diameter of the collar portion is provided, and the small diameter portion A push-button switch, characterized in that the button is fitted into contact with the lower surface of the flange of the operating shaft, and so as to surround the upright piece and the projecting piece of the guide wall.