JPS61163531A - Electromagnetic relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay having a lead piece inside a hollow portion of a spool around which a coil is wound.

(b) Summary of the Invention The present invention provides a method for adjusting the operating characteristics by adjusting the position of the lead pieces even if there are variations in operating characteristics in a conventional electromagnetic relay in which the lead pieces are located inside the hollow part of the spool. In view of this, the base of the lead piece was fixed to a tongue part that was provided on the yoke and the position of the lead piece could be adjusted, thereby making it possible to adjust the position of the lead piece. be.

(C) Prior art and its problems Conventionally, as shown in FIG. 6, as shown in FIG. Its base 21a
, one end portions 22a, 23 of the abbreviated yoke 22.
It is known to have an electromagnetic portion IO sandwiched at points a. A permanent magnet 17. which contacts the other end portions 22b, 23b of the yoke 22.23 of the electromagnet portion 10. Magnetic material 1
8 is provided on the fixed terminal 7.8 and the lead piece 21
A magnetic circuit can be formed through fixed contacts 7a and 8a that can come into contact with and separate from the free end portion 21b of. Note that the yoke 22 includes a common terminal (not shown).

However, in conventional electromagnetic relays, even if there are variations in operating characteristics due to variations in component accuracy 1 assembly accuracy of the lead pieces 21, etc., the lead pieces 21 can be used on the spool I! The base 21a is located in the hollow part 11a of the yoke 2.
2.23, it was not possible to adjust the position of the lead piece 21 to adjust the operating characteristics, resulting in uneven product quality and a large number of defective products.

On the other hand, it is possible to adjust the above-mentioned variation in operating characteristics by increasing the magnetomotive force of the coil 12.
The disadvantage is that the power consumption increases.

(iv) Purpose of the Invention An object of the present invention is to provide an electromagnetic relay with uniform quality and fewer defective products by making it possible to adjust the thickness and position of the lead pieces to address the above-mentioned drawbacks.

(e) Structure of the invention and its effects In order to achieve the above-mentioned object, the electromagnetic relay according to the present invention maintains the basic structure of the conventional one, and adjusts the position of the base of the lead piece so that it protrudes toward the hollow part of the spool. Possible configuration is fixed to the tongue of the yoke.

Therefore, according to the present invention, even if there are variations in the operating characteristics due to variations in the assembly accuracy of the lead pieces, the projecting direction of the tongue can be adjusted without increasing the magnetomotive force of the coil. Since variations in operating characteristics can be eliminated by adjusting the positions of the lead pieces, the quality of products can be made uniform and the occurrence of defective products can be reduced.

(C) Description of Embodiments Embodiments according to the present invention will be described below with reference to FIGS. 1 to 5.

The first embodiment generally includes a base portion l, an electromagnet portion 10,
This is a single stable type electromagnetic relay composed of a case 30.

The base portion l includes a base body 2 having a recess 3 in the center;
It consists of a bent fixed terminal 7.8 that is press-fitted into the press-fit holes 4 and 5 provided in the recess 3, and this fixed terminal 7.8 has a free end 21b of a lead piece 2I, which will be described later, and a fixed contact 7a facing therebetween. , 8a. In addition, the recess 3 is provided with a press-fit hole 6 into which a common terminal 25 (described later) is press-fitted, and an insertion hole (not shown) through which a coil terminal 19 (described later) is inserted is provided at an appropriate level. be.

The electromagnet part tO is integrally molded from synthetic resin, and includes a spool ■1 around which a coil 12 is wound, and this spool 11.
a conductive lead piece 21 penetrating through the hollow portion Ila; and a conductive lead piece 21 located outside the coil I2;
and a pair of abbreviated yokes 22 and 23 facing each other.

That is, the spool 11 can be attached to the upper surface of the base body 2 described above, and the notch 13a of the collar 13.14,
It includes a yoke 22.23 fitted to 14a, and
Concave portions 15a, 16 of the holding portion 15.16 provided on the side surface thereof
A permanent magnet +7° magnetic body 18 is incorporated in a.

The aforementioned fixed terminal 7.8 is fitted and fixed into the notches 15b and 16b provided on the opposing surfaces of the holding portion 15.16, and the fixed contact 7a is placed between the free end portion 21b of the lead piece 2 and the fixed terminal 7.8. , 8a are arranged to face each other. In addition, I
9 and 19 are coil terminals.

Further, the lead piece 21 has its base 21a connected to the yoke 22.
It is fixed by caulking or the like to a twistable tongue part 24 formed by bending it so as to protrude from one end part 22a toward the hollow part 11a of the spool II, and a precious metal is fixed to the free end part 21b. This is a movable contact. Therefore, the position adjustment of the lead piece 21 in order to correct the variation in the operating characteristics is performed at one end 22 of the yoke 22.
a.

This is done by twisting the tongue 24.

The yoke 22 has a structure in which the integrally formed common terminal 25 is press-fitted into the press-fit hole 6 of the base body 2, so its positioning action prevents misalignment during adjustment work or misalignment due to external force, and the operation This has the advantage that an electromagnetic relay with stable characteristics can be obtained.

The case 30 has a substantially box shape that covers the electromagnet section 10 when fitted to the base section 1, and the position of the lead piece 21 is adjusted by twisting one end 22a of the yoke 22 or the tongue section 24 on the flat surface of the case 30. Adjustable adjustment holes 31 are provided as appropriate. Therefore, even after the case 30 is attached to the base portion l, there is an advantage that the position of the lead piece 21 can be adjusted by inserting an adjustment tool (not shown) into the adjustment hole 31. Note that this adjustment hole 31 may of course be used as a gas vent hole.

Next, the operation of this embodiment will be explained.

First, in the case of non-excitation, the lead piece 21 is the fixed terminal 7, the permanent magnet 17. Since a magnetic circuit is formed via the yaw 22, the free end 2Ib, which is a movable contact, closes the fixed contact 7a.

Now, when the coil I2 is excited so that the movable contact 21bI) of the lead piece 21<S pole, the movable contact 2ib repels the fixed contact 7a and opens. Magnetic material 18. Since a magnetic circuit is formed via the fixed terminal 8, the movable contact 21b swings to close the fixed contact 8a.

Then, when the excitation of the coil I2 is cut off, the movable contact 21b of the reed piece 21 absorbs the spring force of the reed piece 21 and the permanent magnet 17.
After separating from the fixed contact 8a due to the magnetic force of the fixed contact 7a, the fixed contact 7a is closed to return to the original state.

In this embodiment, since the tongue portion 24 of the yoke 22 is made to protrude toward the hollow portion 11a, there is an advantage that the outer cedar size does not increase, and an increase in size can be prevented.

In the second and third embodiments, as shown in FIGS. 3 and 4, the above-described first embodiment is
2a or the tongue portion 24 to adjust the reed piece 2I, the reed piece 2I can be adjusted by twisting the tongue 124 from the side.

That is, in the second embodiment, notches 24a and 23c are provided at the bent corner of the tongue 24 and one end 23a of the yoke 23, into which the tip of the adjustment tool 29 can be fitted.

In the third embodiment, notches 24b, 24b are provided at the upper and lower portions of the bent corners of the tongue portion 24.

According to this embodiment, adjustment work can be conveniently performed not only from above but also from the side. In this embodiment, it goes without saying that the adjustment hole 31 may be provided on the side surface of the case 30.

The fourth embodiment, as shown in FIG. It is composed of yokes 22 and 23 having a U-shape.

According to this embodiment, there are advantages that the number of parts is reduced, assembly becomes easier, and the structure becomes more robust.

Note that the electromagnetic relay according to the present invention is not limited to a single stable type relay having one permanent magnet, but may of course be a latching type relay having two permanent magnets.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a sectional view, an exploded perspective view, and a third view showing a first embodiment of an electromagnetic relay according to the present invention. 4 and 5 are exploded perspective views of the main parts of the second, third and fourth embodiments of the electromagnetic relay according to the present invention, and FIG. 6 is a sectional view of the electromagnetic relay according to the conventional example. be. 7a, 8a... Fixed contacts, ■! ...Spool, If
a...Hollow part, ■2...Coil, 2T...Lead piece, 2, 1a...Base, 21b...Movable contact (free end), 22.23...Yoke, 22a, 23a...
- One end, 22b, 23b...other end, 24...tongue, 25...connecting part.

Claims (2)

[Claims] (1) The base of a lead piece located inside the hollow part of the spool around which the coil is wound is fixed to a yoke provided on the spool so as to cover the outside of the coil and one collar of the spool, and the lead An electromagnetic relay in which a free end of the reed piece is positioned between the ends of the yoke, and the free end of the reed piece swings based on excitation and demagnetization of the coil to open and close a contact. An electromagnetic relay characterized in that a base portion is fixed to a tongue portion of a position-adjustable yoke that protrudes toward the hollow portion. (2) The electromagnetic relay according to claim 1, wherein the yoke is integrated at a connecting portion.