JPS5827470Y2 - switch - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement in a switch suitable as a relay.

In general, the contact opening/closing structure of a relay is such that a movable contact 2 provided at the tip of a contact spring 1 is connected to a fixed contact 3 as shown in Fig. 1.
The slider 6 is operated by a rotating piece 5 which is operated by the solenoid 4, as shown in FIG. A sliding clip type is generally used, in which a clip-shaped movable contact piece 7 is supported, and fixed terminals 8, 8, etc. arranged in a straight line are held and slid by the movable contact piece 7. Met.

However, as the opposed contact type mentioned above repeatedly opens and closes at the same point on the contact surface, insulating material forms and adheres to the contact surface, which causes poor contact. With the dynamic clip type, the sliding resistance between the clip and the terminal is large, which forces the slider return spring to be large, and the slider must be moved against the large return spring and sliding resistance. Therefore, there were problems such as having to use a solenoid with a large suction force.

The present invention solves these problems and eliminates the formation and adhesion of insulators on the contact parts, requires only a small return spring, and has low sliding resistance, allowing stable opening and closing operations even with small solenoids. The purpose of the present invention is to provide a switch that can be obtained, and its gist is to support a movable contact piece on an actuator slidably housed in a switch case, to pass the movable contact piece through the switch case, In a switch that is inserted between a pair of opposing fixed terminals so that they can be freely connected and separated,
The actuator supports the top of a movable contact piece formed by bending an elastic plate material into a substantially U shape, and integrally includes a bulging contact portion at the tip of both pieces of the movable contact piece, the bulging contact portion. An expanding curved portion is formed on one end side of the fixed terminal in the switch case where the terminal contacts and separates, and when the switch is turned on, the bulging contact portion of the movable contact piece is formed from the expanding side of the expanding curved portion of the fixed terminal. The switch is characterized in that it is brought into contact with the proximal end side of the expanding curved portion.

Next, an example of the implementation of the present invention will be explained with reference to the drawings from FIG. 3 onwards.

In the figure, 10 is a switch case.

An operating element 11 is accommodated in the switch case 10 so as to be able to reciprocate, and a clip-shaped movable contact piece 12.12 is supported on the bottom surface of the operating element 11.

As shown in FIG. 5, this movable contact piece 12 is formed by bending a conductive plate spring into a substantially U shape, and both U-shaped pieces 12
a, a chevron-shaped bulging contact portion 12b at the tip of 12a;
, 12b, and a contact piece support protrusion 13.14 integrally formed on one end side of the bottom surface of the operating element 11.
The top portion 12C of the movable contact piece 12 is clamped and fixed between the two pieces 12a, 12a in a movable state.

Further, protrusions 15.15 are integrally molded corresponding to the outer sides of both ends of the movable contact piece 12, and the tip 12 of the movable contact piece 12
d and the outside of 12d are in contact.

On the other hand, a pair of fixed terminals 17 are provided on the bottom board 16 of the switch case 10, corresponding to each movable contact piece 12, 12.
．． 17 is provided protrudingly.

Each pair of fixed terminals 17, 17 are located on both sides of the both pieces 12a, 12a of the movable contact piece 12, and are fixed in opposing positions with a gap between them so that they do not come into contact with the both pieces 12a, 12a of the movable contact piece 12. Moreover, the distance between both bulging contact parts 1 is
2b, 12b, and when the movable contact piece 12 is moved together with the operating element 11, both the bulging contact parts 12b, 12b are press-fitted between the two fixed terminals 17, 17.

In addition, these fixed terminals 17.17 are integrally molded with expanded curved parts 17a, 17a, in which one ends of the bulging contact parts 12b, 12b side of the movable contact piece 12 are separated from each other, and when the movable contact piece 12 is turned on, The bulging contact portions 12 b , 12 b come into contact with the tip sides of both the expanded/curved portions 17 a , 17 a , and are further moved to form the bulged contact portions 12 b , 12 .
While b is compressed and narrowed, both expansion curved portions 17a, 17
It is press-fitted to the vicinity of the proximal end of a and then stopped.

That is, as shown in FIG. 6, when this switch is turned ON, the bulging contact portions 12b, 1 are first connected to the point a of the fixed terminal 17.17.
2b contacts and slides, and the contact state is maintained at point b when the ON operation is stopped.

When the ON operating force is released, the return spring 18 urges the expansion curved portion 17a toward the return side.
The force acting on the movable contact piece 12 in the expanding direction acts on the movable contact piece 12 in the direction of returning the movable contact piece 12, and the OFF operation is performed.

Also, at this time, it slides from point b to point a, and a spark occurs at point a during the OFF operation.

In the above-described embodiment, the solenoid 19 is used as shown in FIG.
In this example, a movable piece 20 operated by a movable piece 20 is inserted into the casing 10 to push the actuator 11, but in other cases, one end of the actuator protrudes from the casing and is linked to a solenoid or other driving means. It's also good.

The movable contact piece 12 is attached to the actuator 11 by forming a protrusion 21 on the actuator 11 and inserting the top 12C into a U-shaped groove formed on the protrusion 21, as shown in FIG. It's also good.

Furthermore, the fixed terminal 17 may be arranged on the tip side of the movable contact piece 12 as shown in FIG. 7.

The switch of the present invention is constructed as described above, and when in the OFF state, there is no sliding resistance between the movable contact piece and the terminal, and as the ON operation stops, the contact pressure increases to obtain a predetermined contact pressure. Moreover, since the elasticity of the movable contact piece acts on the return side, the return spring can be small, and therefore, especially when used in relays, the suction force of the solenoid can be small, making it a distant relative of miniaturization and low cost. It is.

In addition, the contact point when the ON operation is stopped and the arc generation point during the OFF operation are separate, and the contact is made by sliding, so even if an insulating material is generated by the arc due to the cleaning action, the contact point when the ON operation is stopped is different. It has various effects such as less contact failure and high electrical stability even with minute currents, and its effectiveness is enormous.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view showing a conventional opposed contact type relay, Figure 2
The figure is a longitudinal cross-sectional view showing the same sliding clip type relay. Figure 3 and the following drawings show an example of the implementation of the present invention. 5 is a perspective view of the movable contact piece, FIG. 6 is an enlarged plan view showing the contact state between the movable contact piece and the fixed terminal, and FIG. 7 is an installation of another example of the movable contact piece. FIG. 3 is a cross-sectional view showing the state and arrangement with fixed terminals. 10... Switch case, 11... Operator, 12... Movable contact piece, 12...
Both pieces, 12b...Bulging contact part, 13...
...Protrusion, 16...Bottom board, 17...
・Fixed terminal, 17a... Expansion curved part, 18...
...Return spring.

Claims (1)

[Scope of utility model registration request] A switch in which a movable contact piece is supported by an actuator slidably housed in a switch case, and the movable contact piece is inserted through the switch case and between a pair of opposing fixed terminals so as to be able to approach and separate, The actuator supports the top of a movable contact piece formed by bending an elastic plate into a substantially U shape, and
A bulging contact portion is integrally provided at the tips of both pieces of the movable contact piece, and an expanding curved portion is formed on one end side of the fixed terminal in the switch case where the bulging contact portion comes into contact with and leaves the switch. The switch is characterized in that when the movable contact piece is turned on, the bulging contact portion of the movable contact piece is brought into contact with the proximal end of the expanding curved portion of the fixed terminal from the expanding side of the expanding curved portion.