JPH0442768B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a relay, more specifically a relay that opens and closes between a movable contact spring and a fixed contact using an electromagnet consisting of a coil, an iron core, an armature, etc. It concerns relays with low values.

[Background technology]

In the case of conventional relays, noise was generated due to the impact when adsorbed between the armature and the iron core, but as an improvement, for example, as shown in Japanese Utility Model Application Publication No. 55-181310, the tip of the armature was made into a terminal block or the like. There is a structure in which the armature and the iron core do not come into direct contact with each other by abutting a part of the cover, but in this case, the collision noise between the iron core and the armature is eliminated, but it is necessary to prevent the two from coming into contact with each other. Since the terminal block or cover is made of a synthetic resin molded product, there is a problem in that the collision noise between the armature metal material and the synthetic resin making up the terminal block or cover is not eliminated, and the sound reduction effect is low.
On the other hand, as shown in Japanese Utility Model Publication No. 58-084431, there is a structure in which a double soundproof case is provided and soundproofing material is filled in the case, but although this is an improvement over the former, The configuration is complicated and 2
There is a problem that the outer size becomes large due to the heavy case.

[Purpose of the invention]

Therefore, in view of the above-mentioned conventional problems, it is an object of the present invention to provide a relay that has low operating noise and can be made compact.

[Disclosure of the invention]

The relay of the present invention opens and closes the space between a movable contact spring and a fixed contact using an electromagnet consisting of a coil, an iron core, an armature, etc., and a braking spring is attached to the armature together with the movable contact spring,
This relay is characterized in that it is configured to apply a braking force to the armature by the combined spring force generated after the movable contact spring and the fixed contact are closed, so that when the armature is attracted to the iron core, To form a magnetic gap to eliminate collision noise between armature iron cores, to reduce the operating noise of a relay, and to reduce the size without increasing the external size by simply adding a braking spring.

Hereinafter, embodiments of the present invention will be illustrated by means of figures.

In FIG. 1, a coil 1 is wound around an iron core 2. A yoke 3 is connected to the iron core 2 and engages the armature 4. The iron core 2 and armature 4 are arranged to face each other. 5 is a movable contact spring having a contact 5' on the free end side. Reference numeral 6 denotes a brake spring, which is attached to the movable contact spring 5, and its free end is placed opposite to the spring portion P near the contact 5'. It may be a cut end and may have any shape as long as it does not cause damage. Also, the free end is the spring part P.
The gap at the point corresponding to the contact point is arbitrarily determined by taking into consideration the degree of shock mitigation at the time of contact collision and the degree of reduction of bounce (contact jumping phenomenon).

Both the movable contact spring 5 and the brake spring 6 are attached at their base ends to the armature 4 by means such as rivet welding or attachment via an insulator. A fixed terminal 7 is fixed to the coil frame 8 and has a fixed contact 7'. A return spring 9 is engaged between the yoke 3 and the armature 4.

FIG. 2 shows another embodiment of the present invention, in which a U-shaped yoke 11 is wound with a coil 1 on one side,
A fixed contact terminal 7 is fixed to the base block 12. 13 is a return spring. In this way, the fixed contacts, yokes, return springs, etc. are not limited to the embodiments shown in FIGS. 1 and 2, and may be configured as desired.

In FIG. 1, when the coil 1 is excited and the armature 4 starts to reverse in the adsorption direction, the armature 4 moves from point a to point b along the spring load curve (b) shown in the load-stroke characteristics of FIG. The movable contact 5' contacts and closes the fixed contact 7' at point b. From this point b, the return spring load (A) is combined with the movable contact spring load (B). As the reversal progresses further, amateur 4 moves from point b to point c, and point c
The braking spring 6 begins to act, and the braking spring load increases
(c) is synthesized. When this braking spring 6 starts working, the movable contact spring 5 is generated due to the collision between the contacts.
In addition, when the armature 4 is reversed, braking is applied, and at point d, where the spring load curve (B) is larger than the attraction force curve (A), the brake spring 6 is The braking force becomes larger than the reversing force and the reversing operation stops. At this time, the setting is such that a magnetic gap 10 remains between the armature 4 and the iron core 2.

〔Effect of the invention〕

As described above, in the present invention, even if a magnetic gap is formed between the armature and the iron core due to the braking force of the braking spring and the armature is reversed in the attracting direction, the two iron cores of the armature do not come into contact at all. Unlike conventional models, there is no collision noise between rigid bodies such as between the armature and the iron core or between the armature and the stopper, and the operating noise is reduced. In addition, in order to stabilize the operating characteristics of the relay, this magnetic gap is unavoidably small, and there may be cases where the armature and the iron core come into contact, but at least the braking spring applies braking to the force that reverses the attraction direction. As a result, impact acceleration is reduced, and the operating noise generated during operation can be reduced. Further, since only the brake spring is added, the external size is not increased and the size is reduced, and the elasticity of the brake spring suppresses bounce of the contact and stabilizes the closed state.

[Brief explanation of drawings]

FIG. 1 is a partially sectional front view showing an embodiment of the present invention. FIG. 2 is a partially sectional front view showing another embodiment of the same invention. FIG. 3 is a load-stroke curve showing the relationship between spring load and suction force. 1...Coil, 2...Iron core, 3...Yoke, 4
... Amateur, 5 ... Movable contact spring, 6 ... Brake spring, 7' ... Fixed contact, 10 ... Magnetic gap, P ... Spring part.

Claims (1)

[Claims] 1. In a relay that opens and closes between a movable contact spring and a fixed contact using an electromagnet consisting of a coil, an iron core, an armature, etc., a braking spring is attached to the armature together with the movable contact spring, and the movable contact spring A relay characterized in that it is configured to apply a braking force to an armature by a composite spring force generated after the relay is closed with a fixed contact. 2. The relay according to claim 1, wherein the free end of the brake spring is disposed opposite to the outside of the spring portion of the movable contact spring, and each base end of each spring is attached to the armature. 3. The relay according to claim 1, wherein a magnetic gap is set between the armature and the iron core after the movable contact and the fixed contact are closed.