JPH0778535A - Circuit switching apparatus - Google Patents

Abstract

PURPOSE:To lower working noise at the time of switching circuits without degrading the working properties of a circuit switching apparatus to be used for electronic appliances, etc. CONSTITUTION:While being brought into contact with either one of fixed terminals 9a, 9b, a movable member 8 having an arc-like surface is swung and displaced to be brought into contact with the other fixed terminal 9a, 9b to switch circuits. As a result, working noise (collision sound) at the time of switching circuits can be lowered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit switching device such as an electric circuit.

[0002]

2. Description of the Related Art A conventional circuit switching device will be described with reference to FIGS. FIG. 7 shows an electromagnetic relay, and FIG. 8 shows a seesaw switch. According to FIG. 7, 10 is a circuit board,
4a is an electromagnet mounted on the circuit board 10,
Reference numeral 5 is an armature spring, which is a mover having a movable contact 12 at the tip of one end and an outer terminal at the other end, and 13a, 13b.
Is a fixed contact which is arranged with the movable contact 12 interposed therebetween and has an external lead-out terminal provided at one end.
b and the movable contact 12 are in contact with each other. The armature spring 5 and the fixed contacts 13a and 13b are both mounted on the circuit board 10.

Next, the operation will be described. The electromagnet 14
By energizing a, the armature spring 5 is moved to the electromagnet 14a.
The circuit switching is performed by pulling the movable contact, which has been pulled toward the side, and was in contact with the fixed contact 13b, away from the fixed contact 13b and brought into contact with the fixed contact 13a.

Further, according to FIG. 8, reference numeral 26 is a substrate,
Fixed terminals 24a, 24 having fixed contacts 25a, 25b
b and the common terminal 27 are planted. 28 is the fixed contact 2 which is swingably supported on the common terminal 27.
Moving contacts 29a, 29 corresponding to 5a, 25b, respectively
a movable plate serving as a movable element having b, and 30 is a case 3
2 is a lever that is swingably supported by a shaft 31 and has a ball that presses the movable plate 28 downward via a compression spring 34.

To explain the above operation, the ball 33 swings the movable plate 28 by pressing and swinging the lever 30, and the movable contact 29a and the fixed contact 25a and the movable contact 29b and the fixed contact 25b come into contact with each other. The circuit is switched between the common terminal 27 and the fixed contact 25a or the fixed contact 25b by separating.

[0006]

However, in each of the above-described conventional configurations, the kinetic energy accumulated in the mover such as the armature spring 5 and the moveable plate 28 causes the mover to collide with and come into contact with the fixed contact, causing mechanical noise. The problem is that it causes noise and becomes noise.

[0007]

In order to solve the above-mentioned problems, in the circuit switching device of the present invention, the surface of the mover which comes in contact with and separates from the fixed terminal is formed in an arc shape, and is oscillated on the fixed terminal. It was done.

[0008]

With the above construction, when the circuit is switched, the mover is in contact with the fixed terminal and swings and displaces on its surface.
The collision force with the fixed terminal is weakened, the mechanical noise generated at this time is reduced, and as a result, circuit switching with less noise can be performed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electromagnetic relay of one embodiment of the circuit switching device of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, 1 is a coil attached to the winding frame 2, 3 is a yoke, and 4 is an iron core, which is crimped to the yoke 3 through the winding frame 2. An armature spring 5 is attached to the armature 6 and is fixedly mounted on the yoke 3.
A mover spring 7 is integrally formed with the armature spring 5 or is fixedly attached to the yoke 3 as an independent member.
Further, the tip is articulated to one end of the mover 8 and is configured to press the mover 8 against the fixed terminal 9a.

The other end of the mover 8 is articulated to the tip of the armature 6. The mover 8 is made of a conductive material and is formed in an arc shape to form one electrode, and the arc-shaped portion has a fixed terminal 9a, an insulating member 11,
The fixed terminals 9b are arranged so that they can be swung and displaced. The fixed terminals 9a and 9b are made of a conductive material, constitute the other electrode, and are arranged on the surface at intervals. The insulating member 11 is installed so as to fill this gap and have its upper surface at the same level as or higher than the upper surface of the fixed terminal.

The operation of the electromagnetic relay constructed as described above will be described with reference to FIGS. 3A and 3B. First, when a voltage is applied to the coil 1 to excite the iron core 4, the armature 6 Is attracted to the iron core 4, and at the same time, the tip of the armature 6 presses one end 8b of the mover 8 against the pressing force P ₁ of the mover spring 7 applied to the other end 8a of the mover 8 by the force of P _2. To do. As a result, the mover 8 swings and displaces from the state of FIG. 3A to the state of FIG. 3B and contacts the fixed terminal 9b. in this case,
The mover 8 includes a fixed terminal 9a, an insulating member 11, and a fixed terminal 9b.
The mover 8 is fixed to the fixed terminal 9b because it rolls up.
When touching, the mechanical noise caused by the touch becomes very small.

In the above state, when the coil is de-energized to de-energize the iron core 4, the armature 6 separates from the iron core 4, and at the same time, the tip of the armature 6 adds one end 8b of the mover 8 to the armature 8. The applied force P ₂ disappears, and the mover 8 swings from the state of FIG. 3 (b) to the state of FIG. 3 (a) by the pressing force P ₁ of the mover spring 7 at the other end 8 a of the mover 8. , Is displaced and comes into contact with the fixed terminal 9a. In this case, the mover 8 rolls on the fixed terminal 9b, the insulating member 11, and the fixed terminal 9a as in the case described above.
The mechanical noise when contacting a is extremely low.

In the above embodiment, as shown in FIG. 4, the movable element 8a is integrally provided at the tip of the movable element spring 7 so as not to impair the degree of freedom of movement of the movable element. It is possible to reduce the number and increase the reliability of electrical coupling.

A seesaw switch, which is another embodiment of the circuit switching device of the present invention, will be described below with reference to FIGS. As shown in the figure, reference numeral 15 denotes a mover leaf spring, which is jointly supported by both ends of an arcuate mover 16. 17
a and 17b are fixed terminals which are linearly arranged with a space provided therebetween.
A common terminal 18 is arranged on the substrate 19 in parallel with the fixed terminals 17a and 17b. The mover 16 is a case 21.
The pressure generated by the strain given to the mover leaf spring 15 by the lever 20 rotatably attached to the fixed terminal 17a, 17b and the common terminal 18 makes it possible to swing and displace them. It is arranged.

The operation of the seesaw switch configured as described above will be described with reference to FIGS. 6 (a) and 6 (b). First, in the state of FIG. 6A, one end 20 of the lever 20 is
When a force P ₂ is applied to b, the lever 20 rotates around the shaft 22, and the tip 20c of the lever 20 rotates and displaces on the mover leaf spring 15 against the spring pressure. At the same time, the mover 16 swings and displaces from the state in which the fixed terminal 17b and the common terminal 18 are short-circuited to the state in FIG. 6B to short-circuit the fixed terminal 17a and the common terminal 18.

At this time, since the mover 16 rolls on the fixed terminal 17b, the common terminal 18, the insulating member 23, and the fixed terminal 17a, when the mover 16 comes into contact with the fixed terminal 17a, a mechanical sound due to the contact is generated. Very small

Next, in the state shown in FIG. 6B, when a force P ₃ is applied to the other end 20a of the lever 20, the lever 20 rotates around the shaft 22 and the tip 20c of the lever 20 moves the movable element leaf spring 15 The upper part rotates and displaces against the spring pressure. at the same time,
The mover 16 swings and displaces from the state in which the fixed terminal 17a and the common terminal 18 are short-circuited to the state in FIG. 6A, and the fixed terminal 17b and the common terminal 18 are short-circuited.

At this time, similarly to the above, the mover 16 rolls on the fixed terminal 17a, the insulating member 23, and the fixed terminal 17b, so that when the mover 16 comes into contact with the fixed terminal 17b, a mechanical noise due to the contact is generated. Very small

[0020]

As described above, according to the present invention, the movable element having an arcuate surface is oscillated and displaced while the fixed terminals are in contact with each other, so that circuit switching can be performed without impairing the original circuit switching function. It is possible to provide an excellent circuit switching device that can reduce mechanical noise that sometimes occurs.

[Brief description of drawings]

FIG. 1 is a perspective view of an electromagnetic relay that is an embodiment of a circuit switching device of the present invention.

FIG. 2 is a sectional view of the same side.

FIG. 3 is an explanatory diagram of the same operation.

FIG. 4 is a perspective view of the other embodiment.

FIG. 5 is a perspective view of a seesaw switch according to another embodiment of the present invention with a cover cut away.

FIG. 6 is an explanatory diagram of the same operation.

FIG. 7 is a perspective view of an electromagnetic relay that is a conventional circuit switching device.

FIG. 8 is a perspective view of the seesaw switch with a cover cut away.

[Explanation of symbols]

 8 mover 9a, 9b fixed terminal 16 mover 17a, 17b fixed terminal 20 lever 22 shaft

Claims (1)

[Claims] 1. A movable element having an arcuate surface and two fixed terminals in contact with the movable element. By rotating the movable element, the movable element is swung and displaced between the fixed terminals. A circuit switching device that switches circuits.