JPS61163530A - 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 the 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, resulting in a large number of defective products. be.

(c) Conventional technology and its problems Conventionally, this type of electromagnetic relay has been used, for example! @3 As shown in Figure 3, the lead piece 21 is positioned inside the hollow part 11 & of the spool 11 around which the coil 12 is wound, and the base 21
a is one end portion 22a, 23 of an abbreviated yoke 22.23 that fits into a notch provided in the collar of the spool 11;
A device having an electromagnet portion 10 sandwiched between 3a is known. A permanent magnet 17. which contacts the other end portions 22h, 23b of the yoke 22.23 of the electromagnet portion 10. The magnetic body 18 is provided on the fixed terminal 7.8 and on the lead piece 2.
A magnetic circuit can be formed through fixed contacts 7m and 8a that can be brought into contact with and separated from the free end portion 21b of 1. In addition,
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 and assembly performance of the lead pieces 21, etc., the lead pieces 21 are located within the hollow part 11a of the spool 11, and the base 21a to yoke 2
2.23, it was not possible to adjust the position of the lead piece 21 to adjust the operating characteristics g1, 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 dissipation power increases.

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

(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 has a base part of the lead piece that can be adjusted in position to protrude outward. This structure is fixed to the tongue of the yoke.

Therefore, according to the present invention, even if variations in operating characteristics occur due to variations in assembly performance 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 FIG. 1 or 2.

The vi1 embodiment basically consists of a base ll5t and an electromagnet part 1.
0 and a case 30.

The base part 1 includes a base body 2 having a recess 3 in the center;
It consists of bent fixed terminals 7 and 8 that are press-fitted into press-fit holes 4 and 5 provided in the recess 3, and these fixed terminals 7 and 8 are connected to a fixed contact 7 that faces a free end 21h of a lead piece 21, which will be described later. @, has 8a. The recess 3 is provided with a press-fitting 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, 19 (described later) is inserted is suitably formed.

The electromagnet part 10 is integrally molded with synthetic resin and includes a spool 11 around which a coil 12 is wound, and this spool 11.
A conductive lead piece 21 that penetrates inside the hollow part 11a, and a conductive lead piece 21 that is located outside the coil 12 and
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 g13m of the collar portion 13.14,
It includes yokes 22 and 23 fitted to 14a, and
Concave portions 15a, 16 of the holding portion 15.16 provided on the side surface thereof
A permanent magnet 17° and a magnetic body 18 are incorporated in g.

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, 8m are arranged facing each other. In addition, 1
9.19 is a coil terminal.

Further, the lead piece 21 has its base 21a connected to the yoke 22.
It is fixed by caulking etc. to the twistable tongue part 24 formed by bending the tongue part 24 which protrudes outward from one end part 22&, and at the same time, a precious metal is fixed to the free end part 21b so as to function as a movable contact. It is. Therefore, the position adjustment of the lead piece 21 for correcting variations in operating characteristics is performed by twisting the tongue portion 24 of the one end portion 221 of the yoke 22.

The yoke 22 has a structure in which the integrally formed common terminal 25 is press-fitted into the press-fit hole 6 provided in the base body 3, so the positioning action of the yoke 22 prevents misalignment during adjustment work.
This has the advantage of being able to prevent positional displacement due to external forces and providing an electromagnetic relay with stable operating characteristics.

The case 30 has a substantially box-like shape that covers the electromagnet part 10 when fitted to the base part 1, and the case 30 has a flat part that is attached to one end part 22a of the yoke 22 or the tongue part 24 by twisting it to adjust the position of the lead piece 21. An adjustment hole 31 is provided as appropriate to allow adjustment. Therefore, even after the case 30 is attached to the base portion 1, 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 be used as a gas vent hole, and it goes without saying that it may also be provided on the side surface of the case 30.

Next, the operation of this embodiment will be explained.

First, in the case of blind excitation, the reed piece 21 is connected to the fixed terminal 7, the permanent magnet 17. Since a magnetic circuit is formed via the yoke 22, its free end 21b, which is a movable contact, closes the fixed contact 7a.

Now, when the coil 12 is energized so that the movable contact 21b of the lead piece 21 becomes 5ffi, the movable contact 21b repulses the fixed contact 7a and opens, while the lead piece 21 becomes yoke 23. 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 12 is cut off, the movable contact 21b of the reed piece 21 is activated by 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 protrudes outward, there is no need for a special tool to twist the tongue portion 24, and the advantage is that the tongue portion 24 can be easily adjusted to the 111M position using pliers or the like. be.

In addition, in the above-mentioned embodiment, a pair of yokes 22 made of separate bodies are used.
．． 23 is shown, but this is not necessarily the case; if a yoke formed of a substantially U-shape integrated through a connecting part (not shown) is used, the number of parts will be reduced and assembly will be easier. It has the advantage of being solid and solid. Further, the electromagnetic relay according to the present invention is not limited to a single stable type having one permanent magnet, but may of course be a latching type having two permanent magnets.

[Brief explanation of drawings]

1 and 2 are cross-sectional views and exploded perspective views showing a first embodiment of an electromagnetic relay according to the present invention, and FIG. 3 is a cross-sectional view of a conventional electromagnetic relay. 7m, 8a...Fixed contact, 11...Spool, 11
&... Hollow part, 12... Coil, 21... Lead piece, 21a... Base, 21b... Movable contact (free end), 22.23... Yoke, 22a, 23a.・・・
One end, 22b, 23b...other end, 24...tongue.

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 is fixed to a tongue of a yoke that protrudes outward and whose position is adjustable. (2) The electromagnetic relay according to claim 1, wherein the yoke is integrated at a connecting portion.