JPH0266826A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To considerably reduce generation of frictional looses and also prevent the armature from rebounding, by providing a buffer which is so formed as to be capable of being attached to the armature or the yoke and absorbing the impact force. CONSTITUTION:A coil 14 is energized so as to form respective magnetic circuits in an armature 10 and a yoke 11, the electromagnetic forces of which circuits displace the armature 10 downwards. Displacement of the armature 10 then causes the armature 10 to collide against the yoke 11 but at first the armature 10 is brought in contact with the whole face of the main body 33 of a buffer 30; the force of the armature 10 during collision with the yoke 11 is therefore absorbed by the buffer 30.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to improvements in electromagnetic relays.

[Conventional technology]

FIG. 6 is a schematic diagram of the electromagnetic relay, in which 1 is an armature and 2 is a yoke. The armature 1 is formed in an L-shape, and the yoke 2 is formed in a single-shape, and these are combined to be rotatable at a hinge point l-3. There is a hinge spring 4 near the hinge point l-3.
or installed. Further, 5 is a coil bobbin, a coil 6 is wound around this coil bobbin 5, and the armature 1 is inserted into the hollow part 7 and the yoke 2 is inserted into the coil bobbin 5.
or installed. With such a configuration, when the coil 6 is energized, the armature, for example, is displaced in the direction of arrow (A) and collides with the yoke 2. At this time, in response to the displacement of the armature 1, a meter contact (not shown) closes and a break contact opens. Also, coil 6
When the energization is released, the armature 1 returns, the make contact opens, and the break contact closes.

[Problem to be solved by the invention]

By the way, in such an electromagnetic relay, since the armature 1 and the yoke 2 collide with each other, the yoke 2 is provided with a non-magnetic plate 8 as shown in FIG. However, if such a non-magnetic 11y8 is provided, 1111 wear occurs and accumulates every time an armature collides with the non-magnetic 11y8. A large amount of such wear powder is generated as the number of operations of the electromagnetic relay increases.

This abrasion powder then enters, for example, between the meter contacts and the break contacts, causing poor electrical contact. In particular, small electromagnetic relays are affected by wear particles. Further, since the non-magnetic plate 8 is hard, the armature 1 rebounds when the armature 1 collides with the non-magnetic plate 8. Such rebound becomes a factor that deteriorates the performance of the electromagnetic relay. or,
Embosses 9 are formed on the yoke 2 as shown in FIG. 8 without using the non-magnetic plate 8, but even if these embosses 9 are formed, abrasion powder is generated and the rebound of the armature 1 is reduced. happen.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an electromagnetic relay that can extremely reduce wear and tear, prevent armature rebound, and control holding current or holding voltage.

[Means to solve the problem]

The present invention aims to achieve the above object by providing an electromagnetic device that is formed in a shape that can be freely attached to an armature or a yoke, and is provided with a buffer that absorbs the impact force when the armature is displaced and collides with the yoke. It is a relay.

[Effect]

By providing such a means, when the armature is displaced, it collides with a shock absorber attached to the armature or the yoke. In other words, no abrasion powder is generated, and the impact force upon collision of the armature is absorbed by the buffer.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of an electromagnetic relay. In the same figure, 10
11 is an armature, and 11 is a yoke, which are combined to be rotatable at a hinge point 12. Further, 13 is a coil bobbin, and a coil] 4 is made of a ball on this coil bobbin 13.

An armature 10 is inserted into the inside of the coil bobbin 13, and a yoke 11 is provided to surround the coil 14. The hinge spring 15 is fixed to the yoke 11 and the coil bobbin 13, and the spring body 15a is fixed to the armature 10. Further, a drive card 16 is attached to the displacing tip of the armature 10.

On the other hand, a movable spring 17 is arranged below the yoke 11,
The contacts provided on the movable spring 17 form a make contact 18 and a break contact 19. The movable spring 17 is fixed at one end and is pushed by the drive card 16 at the other end. Note that the movable springs 17 are arranged in a number corresponding to the number of make contacts and break contacts.

Further, 20 to 25 are lead-out terminals connected to the coil 14, the meter contact 18° break contact 19, and 26 is an outer cover.

Now, 30 is a buffer, which is attached to the yoke 11, and when the armature 10 is displaced, the yoke 11
It has the function of absorbing the impact force when colliding with an object, preventing the generation of abrasion powder, and controlling the holding current or holding voltage. Specifically, it has a shape as shown in FIG. That is, in this buffer body 30, a support body 32 in which mounting holes 31 are formed and a buffer main body 33 are integrally formed of polyester film or polyimide. By the way, this buffer body 30 is attached to the yoke 11 through the mounting hole 31 as shown in FIG. Other end side 33
b is in a state where it is not in contact with the yoke 11 but is separated upwardly.

Next, the operation of the electromagnetic relay configured as described above will be explained.

When the coil 14 is energized, the magnetic field generated by this energization forms a magnetic circuit in the armature 1o and the yoke 11, and this electromagnetic force causes the armature 10 to be displaced downward (b) as shown in FIG. . Due to this displacement of the armature 1o, the armature 10 is moved to the yoke 11.
At this time, the armature 1o first contacts the other end 33b of the buffer body 33 of the buffer body 30, and then gradually contacts the entire surface of the buffer body 33. Therefore, the impact force when the armature 10 collides with the yaw] is absorbed by the shock absorber 30.

In other words, the collision force F of the armature 10 is decomposed into a lateral force FX and a downward force Fy, as shown in FIG. be done. On the other hand, in response to the displacement of the armature 10, the drive card 16 moves downward and pushes the movable spring 17 downward.

Then, the make contact 18 closes and the break contact 19 opens.

Also, the coil 14 (= when the J force is released, the coil] 4
The magnetic field generated by the armature disappears and the armature] 0 returns to its original position at i'l'. Therefore, driving force 1.]
6 moves to one corner (1, plus 1J movement of 1゛1') 7 returns to its original position.However, the make contact opens and one flake contact closes.

As described above, in the above embodiment, the armature is formed in a shape that can be freely attached to the yoke, and is provided with a buffer body 3o that absorbs the impact force when the armature is displaced from the yoke 11 and collides with the yoke 11. Therefore, even if the armature 10 and the yoke collide, no abrasion powder is generated, and the collision force at the time of the collision is absorbed and the armature 10 does not rebound. Furthermore, by changing the thickness of the buffer body 30, the holding current or holding voltage can be controlled. In particular, since the buffer main body 33 of the buffer body 30 is provided at an angle with respect to the yoke, the collision force of the armature 10 can be reliably absorbed. The rebound of the armature 10 can also be transmitted to the hinge point 2 and become a factor in generating wear powder, or the generation of such wear powder can be eliminated.

Therefore, the terminals of the make contact and the break contact will not have contact failure due to wear particles, and the performance as an electromagnetic relay can be improved. In addition, since the shock absorber 30 has very little wear, the armature 10 when the coil 14 is energized
Since the gap between the coil 14 and the yoke 11 can be kept constant, the voltage when the coil 14 is energized can be kept constant, and the current or voltage applied during the holding state can be controlled.

It should be noted that the present invention is not limited to the one embodiment described above, and may be modified without departing from the spirit thereof. For example, the present invention can be applied to an electromagnetic relay having a magnetic circuit composed of a concave yoke 40 and a plate-shaped armature 41 as shown in FIG. In this case, the buffer body 43 is removed from one piece 40a of the yoke 40, and is in contact with one end 44a of the buffer body 44 or one piece 40a of the yoke 40, and is separated from the other end 44b or one piece 40a. It becomes. Note that 42 is a hinge spring. In addition, the shock absorber is not only attached to the yoke, but also removed from the armature.
It's okay to leave.

〔Effect of the invention〕

As detailed above, according to the present invention, it is possible to provide an electromagnetic relay that can extremely reduce the occurrence of wear and tear and prevent rebound of the armature.

[Brief explanation of the drawing]

1 to 4 are diagrams for explaining one embodiment of the electromagnetic relay according to the present invention, and FIG. 1 is a configuration diagram, and FIG.
The figure is an external view of the shock absorber, Figure 3 is an external view of the shock absorber attached to the yaw, and Figure 4 is a diagram explaining the function of the shock absorber.
FIG. 5 is a diagram showing an example of application of the buffer, and FIGS. 6 to 8 are diagrams for explaining the prior art. 10...armature, ]]...yoke, 13...
Coil bobbin, 14 Coil, 15... Hinge spring, 1
6. Drive card, 17. Movable spring, 18. Mek contact, 19. Break contact, 30. Buffer, 31.
...Intake hole, 32.Support, 33.Buffer body. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] An electromagnetic relay characterized by comprising a buffer (30) formed in a shape that can be freely attached to an armature or a yoke, and absorbing an impact force when the armature is displaced and collides with the yoke.