JPH04319222A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To improve withstand voltage between a contact and a coil, and to simplify the structure of an electromagnetic realy in providing the realy with a mechanism preventing arc from being generated between a moving contact spring and a coil terminal. CONSTITUTION:A moving contact spring 32 and a moving spring terminal 31 for supporting the fixed end of the moving contact spring 32 are formed in an integrated manner. The fixed end of the spring 32 and the moving spring terminal 31 are held by a holding part 11 formed on a base 1 so that the fixed end of the spring 32 are partitioned from a coil terminal 22.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay equipped with a mechanism for preventing arcing between a movable contact spring and a coil terminal.

[0002] In recent years, electromagnetic relays used in telephones and the like have a high withstand voltage between the contacts and the coil, and are required to be simpler than conventional relays in order to reduce the cost of the device. . Electromagnetic relays with high withstand voltage between the contacts and the coil have been proposed in the past, but there were limits to their simplification. Therefore, it is desired to realize an electromagnetic relay that has a high withstand voltage between the contacts and the coil and can be simplified.

0003

2. Description of the Related Art FIG. 2 is a perspective view showing the main parts of a conventional electromagnetic relay. In the figure, the conventional electromagnetic relay has a driving part 2 mounted in the center of a base 1 and a contact spring part 3 arranged on one or both sides of the driving part 2.
and the contact spring portion 3 are sealed inside a cover 4 fitted into the base 1.

The drive unit 2 includes a coil 23 wound around a coil bobbin 21 and connected to coil terminals 22 at both ends, and a pair of magnetic pole pieces 5 that are in contact with both poles of a permanent magnet 51 and face each other.
2, a yoke 54 having a hinge portion 53 at one end and a magnetic pole piece 52 magnetically connected to the other end, and a movable iron core 55 passing through the coil bobbin 21 around which the coil 23 is wound. ing.

The coil bobbin 21 is formed at one end with a magnetic pole piece holding portion 25 having a pair of magnetic pole piece holding grooves 24, and a movable iron core 55 having a card 6 for driving a movable spring in the middle has a hinge portion 53 at one end. is swingably supported by
The other end is a pair of magnetic pole pieces 52 press-fitted into the magnetic pole piece holding groove 24.
inserted between.

[0006] The contact spring portion 3 disposed on one or both sides of the drive portion 2 is a movable spring terminal 3 supported by the base 1.
A movable contact spring 32 is welded to the card 6, and a pair of fixed contact springs 33 are arranged to sandwich the free end side of the movable contact spring 32. It is configured to fit into the movable contact spring 32.

Although not shown, a movable contact is fixed near the free end of the movable contact spring 32, and a fixed contact is fixed to the fixed contact spring 33 at a position facing the movable contact. Therefore, the movable contact spring 3 is
2, the movable contact fixed to the movable contact spring 32 comes into contact with one of the fixed contacts.

[0008]

[Problems to be Solved by the Invention] However, in conventional electromagnetic relays, as shown in the figure, the coil terminal and the fixed end side of the movable contact spring are close to each other, and when a high voltage is applied to the coil terminal or the movable contact spring, a problem arises between the two. An arc occurs. As a result, there was a problem in that improvement in the withstand voltage between the contact and the coil was inhibited.

Furthermore, in order to simplify the structure, it is desirable to directly support the fixed end side of the movable contact spring by the base, but in order to obtain appropriate spring characteristics and save power, the movable contact spring is relatively thin. Since the electromagnetic relay shown in the drawing is made of metal, there is a problem in that the movable contact spring cannot be directly supported.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnetic relay which can improve the withstand voltage between the contacts and the coil and which can be simplified in structure.

[0011]

[Means for Solving the Problems] FIG. 1 is a divided perspective view showing the main parts of an electromagnetic relay according to the present invention. The same objects are represented by the same symbols throughout the figures.

The above problem is solved by the coil 23 wound around the coil bobbin 21 and connected to the coil terminal 22 at both ends, the movable iron core 55 passing through the coil bobbin 21 mounted in the center of the base 1, and the coil 23 being wound around the coil bobbin 21 on one or both sides. It has a movable contact spring 32 disposed, and a movable iron core 55.
In the electromagnetic relay in which the movable contact spring 32 and the movable spring terminal 31 supporting the fixed end of the movable contact spring 32 are integrally formed, the movable contact spring 32 is connected to the movable contact spring 32 via the card 6. Fixed end and coil terminal 2
2, the fixed end of the movable contact spring 32 and the movable spring terminal 31
This is achieved by the electromagnetic relay of the present invention, which includes:

[0013]

[Operation] By integrally forming the movable contact spring and the movable spring terminal that supports the movable contact spring in Fig. 1, it is possible to reduce the number of parts, reduce the price, and at the same time reduce the labor cost required for assembly. . In addition, by configuring the holding part formed on the base to partition between the fixed end of the movable contact spring and the coil terminal to hold the fixed end of the movable contact spring and the movable spring terminal, the coil terminal and the movable contact spring can be separated. The movable spring terminal is mechanically reinforced to prevent arcing between the terminals. That is, it is possible to realize an electromagnetic relay that can improve the withstand voltage between the coils and simplify the structure.

[0014]

[Embodiment] An embodiment of the present invention will be described below with reference to FIG. In the figure, the electromagnetic relay according to the present invention has a driving part 2 mounted in the center of a base 1 and a contact spring part 3 arranged on one side or both sides of the driving part 2. is sealed inside a cover 4 fitted into the base 1.

The drive unit 2 includes a coil 23 wound around a coil bobbin 21 and connected to coil terminals 22 at both ends, and a pair of magnetic pole pieces 5 that contact both poles of a permanent magnet 51 and face each other.
2, a yoke 54 having a hinge portion 53 at one end and a magnetic pole piece 52 magnetically connected to the other end, and a movable iron core 55 passing through the coil bobbin 21 around which the coil 23 is wound. ing.

The coil bobbin 21 is formed at one end with a magnetic pole piece holding portion 25 having a pair of magnetic pole piece holding grooves 24, and the movable iron core 55, which has a card 6 for driving a movable spring in the middle, has one end formed in the hinge portion 53. is swingably supported by
The other end is a pair of magnetic pole pieces 52 press-fitted into the magnetic pole piece holding groove 24.
inserted between.

The contact spring portion 3 includes a movable contact spring 32 integrally formed with a movable spring terminal 31 on the fixed end side, and a pair of fixed contact springs 33 disposed with the free end side of the movable contact spring 32 sandwiched therebetween. The grooves 61 provided in the card 6 fit into the movable contact springs 32 when the card 6 is combined with the drive unit 2.

A holding portion 11 is formed on the base 1 to partition between the fixed end of the movable contact spring 32 and the coil terminal 22, and the fixed end of the movable contact spring 32 and the movable spring terminal 31, which are integrally formed, are held. It is held by part 11.

Although not shown, a movable contact is fixed near the free end of the movable contact spring 32, and a fixed contact is fixed to the fixed contact spring 33 at a position facing the movable contact. Therefore, the movable contact spring 3 is
2, the movable contact fixed to the movable contact spring 32 comes into contact with one of the fixed contacts.

By integrally forming the movable contact spring and the movable spring terminal that supports the movable contact spring in this way, it is possible to reduce the number of parts, reduce the price, and at the same time reduce the labor cost required for assembly. .

[0021] Furthermore, by configuring the holding portion formed on the base to partition between the fixed end of the movable contact spring and the coil terminal to hold the fixed end of the movable contact spring and the movable spring terminal, the coil terminal and This prevents arcing between the movable contact springs and mechanically reinforces the movable spring terminals. That is, it is possible to realize an electromagnetic relay that can improve the withstand voltage between the coils and simplify the structure.

Although the present invention and the embodiments have been described with reference to a polarized electromagnetic relay, it can be applied to general electromagnetic relays as long as they have a similar structure and the same effect can be obtained. Not even.

[0023]

As described above, according to the present invention, it is possible to provide an electromagnetic relay that can improve the withstand voltage between the coils and can be simplified in structure.

[Brief explanation of the drawing]

FIG. 1 is a split perspective view showing the main parts of an electromagnetic relay according to the present invention.

FIG. 2 is an exploded perspective view showing the main parts of a conventional electromagnetic relay.

[Explanation of symbols]

Claims (1)

[Claims] [Claim 1] A coil (23) wound around a coil bobbin (21) and connected at both ends to a coil terminal (22).
, the coil bobbin (
A movable iron core (55) passing through the coil bobbin (21) and a movable contact spring (32) disposed on one or both sides of the coil bobbin (21), the movable iron core (55)
), the movable spring terminal (31) supports the movable contact spring (32) and the fixed end of the movable contact spring (32).
) is integrally formed, and a base (
1) An electromagnetic relay characterized in that the fixed end of the movable contact spring (32) and the movable spring terminal (31) are held by a holding portion (11) formed in the above.