JPH0455395Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a push switch that has a light operating force and can prevent contact failure due to vibration.

[Conventional technology]

As a push switch of this kind, the applicant:
I first proposed what is shown in Utility Application No. 1983-39892.
This push switch has a conductor plate that rotates according to the up and down movement of the knob, two fixed terminals that face the conductor plate and can be contacted by the conductor plate, and two fixed terminals that are connected to protrusions formed on both sides of the conductor plate. 2, which biases this conductor plate in the direction away from the fixed terminal.
It is equipped with two springs.

Then, by pressing the knob and lowering it, the conductor plate rotates against the force of the spring, and as a result, the conductor plate contacts the two fixed terminals, and the conductor plate
The pair of fixed terminals are electrically connected and turn on, and when the pressing force of the knob is released, the conductor plate is rotated away from the fixed terminals by the force of the spring, turning off.

[Problems to be solved by the invention] By the way, in the technique proposed as described above, since the conductor plate is rotated against the force of two springs, the force required for the pressing operation of the knob, That is, the actuation force is large, and therefore there is a problem in terms of operability.

In addition, in the above technology, the conductor plate contacts the two fixed terminals to form an ON state, but if some vibration is applied to the push switch in this ON state, Furthermore, the force generated by the vibrations tends to cause the conductor plate and one of the fixed terminals to separate, resulting in an OFF state.

The present invention is intended to solve the above-mentioned conventional problems, and the purpose of the present invention is to provide a push switch that can reduce operating force and prevent contact failure due to vibration.

[Means for solving problems]

In order to achieve the above objectives, this invention
A rotatably supported conductor plate is electrically connected to one fixed terminal via one tension spring, and as the conductor plate rotates, the conductor plate comes into contact with the other fixed terminal. ing.

[Effect]

According to the present invention, since the conductor plate is rotated against the force of one spring, the force required for pressing the lever can be reduced compared to the conventional method. The ON state can be formed by contacting the fixed terminal, and the number of points for disconnecting the contact is reduced to one instead of the conventional two, reducing the possibility of contact failure due to vibration. I was able to do it.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figures 1 to 4 are explanatory diagrams of embodiments of the present invention,
Fig. 1 is a sectional view of the main parts of the push switch as seen from above, Fig. 2 is an exploded perspective view of the main parts of the push switch, Fig. 3 is an assembled perspective view of the main parts of the push switch, and Fig. 4 A to C show contact switching of the push switch. FIG.

In FIG. 1, 1 is a case, and 2 is a support member installed upright on the case 1. A pair of fixed terminals 3 and 4 are embedded in the support member 2, and the tip portions of both fixed terminals 3 and 4 are embedded in the support member 2. protrudes outward from the bottom of the case 1. As shown in FIG. 2, the support member 2 is provided with upper and lower recesses 5 and 6 toward the inside of the case 1, and the fixed terminal 3 is exposed from the bottom surface of the recess 6. ing. A lever 7 extends along the side surface of the case 1, and has arms 7a, 7b, and a cylindrical connecting portion 7c, and is rotatably supported by the case 1 by the connecting portion 7c. The arm 7b is provided with an engaging portion 7d that engages with a protrusion of a conductor plate, which will be described later. Reference numeral 9 denotes an L-shaped conductor plate, which consists of a horizontal portion 9a and a bent portion 9b.The upper surface of the bent portion 9b is engaged with the engaging portion 7d of the lever 7, and the horizontal portion 9a is bifurcated. Divided upper and lower protrusions 1
0 and 11 are formed. 12 is a spring that biases the conductor plate 9 in the direction away from the fixed terminal 3, and the spring 12 is latched to the protrusion 9c at the tip of the bent portion 9b of the conductor plate 9 and the front part of the fixed terminal 4. Therefore, the conductor plate 9 and the fixed terminal 4 are electrically connected. In FIG. 1, reference numerals 13 and 14 are stoppers that restrict the rotation range of the lever 7.

Next, the operation of switching the contacts of the switch as described above will be explained with reference to FIG.

FIG. 4(a) shows the lever 7 in an unpressed state, in which the upper protrusion 10 of the conductor plate 9 is engaged with the upper recess 5 of the support member 2, and the lower protrusion 11 is engaged with the upper recess 5 of the support member 2. 2 is engaged with the lower recess 6, and the lower protrusion 1
Although the tip of the terminal 1 faces the fixed terminal 3, the two are not in contact with each other.

When the lever 7 is pressed downward against the elasticity of the spring 12 from this state, the engaging part 7d of the lever 7 presses the bent part 9b of the conductor plate 9, and the upper protrusion 10 of the conductor plate 9 The support member 2 rotates clockwise around the upper concave portion 5 as a fulcrum, and after the lower protrusion 11 contacts the fixed terminal 3 as shown in FIG. When pressed further downward, the state shown in FIG. 4C is reached.

In addition, while moving from FIG. 4 B to C, the conductor plate 9
In this case, the lower protrusion 11 is connected to the lower recess 6 of the support member 2.
Rotate using the fulcrum as a fulcrum. In the state shown in FIG. The horizontal component force acts as contact pressure, and the vertical component force acts as a component force corresponding to the actuation force.

If the operating force of the lever 7 is released, the state returns from the state shown in FIG. 4C through the state shown in FIG.

In the above embodiment, if the spring force of the spring 12 is equivalent to the spring force of each of the two conventionally provided springs, the spring force that biases the conductor plate 9 in the direction away from the fixed terminal 3 is is 1/2 that of the conventional one, and therefore the vertical component of the spring 12, that is, the operating force, is reduced to 1/2 of that of the conventional one.

Also, while the lever 7 is moving downward,
Since the fulcrum of the conductor plate 9 shifts from the upper recess 5 to the lower recess 6 of the support member 2, the spring 12 does not reverse, and normal pressing and returning operations can always be performed.

Furthermore, the conductor plate 9 is in contact with one of the fixed terminals 3 by a spring 12, and the contact is switched between the protrusion 11 on the lower side of the conductor plate 9 and the one on the other fixed terminal 3.
Since this is done only at certain locations, the number of locations where contact failures occur due to vibrations is reduced to 1/2 compared to conventional methods, making it possible to prevent contact failures due to vibrations.

In the above embodiment, the conductor plate 9 is rotated by the lever 7, but the conductor plate 9 may be rotated by pressing a knob as in the conventional example.

[Effect of idea]

According to the present invention, the operating force of the conductor plate is reduced by replacing the conventional two springs that bias the conductor plate in a direction away from the fixed terminal with one spring having the same elasticity as the individual springs. It can be reduced compared to the conventional method, and when the conventional conductor plate is connected to and separated from two fixed terminals by connecting and disconnecting the contact ON and OFF at one place between the conductor plate and one fixed terminal. Compared to
Since the number of contact switching points is reduced to 1/2, it is possible to prevent contact failure due to vibration compared to the conventional method.

[Brief explanation of the drawing]

1 to 4 are explanatory diagrams of an embodiment of the present invention. FIG. 1 is a sectional view of the main part of the push switch seen from above, FIG. 2 is a perspective view of the main part of the push switch, and FIG. FIGS. 4A, 4B and 4C, which are perspective views of the main parts of the push switch, are explanatory views of the operation of switching the contacts of the push switch. 3, 4...Fixed terminal, 9...Conductor plate, 10...
Upper protrusion, 11...Lower protrusion, 12...Tension spring.

Claims (1)

[Scope of utility model registration request] A rotatably supported conductor plate is electrically connected to one fixed terminal via one spring, and as the conductor plate rotates, the conductor plate comes into contact with the other fixed terminal. Pussyyuswitch is characterized by this.