JPS63301442A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To make it possible to obtain an electromagnetic relay which is small, highly sensitive and easy to assemble or adjust by constituting an electromagnetic relay using a magnetic circuit structure where permanent magnets are provided inside both magnetic poles of a U letter-shaped iron core round which a coil is wound and a U letter-shaped armature capable of inclining action so that self both ends may be opposed to both magnetic poles of the iron core is arranged. CONSTITUTION:This electromagnetic relay is equipped with a coil assembly where permanent magnets 2a, 2b are arranged near at least one side of both ends of a U letter-shaped iron core 1 round which a coil 19 is wound, and an armature assembly where a hinge spring part 5 for supporting the inclining action of a U letter-shaped armature 3 which is so arranged that self both ends may be opposed to both ends of the iron core 1, a supporting axis 1 which becomes a fulcrum, and a movable contact spring 6 are fixed in a body with an insulator 8. And it is equipped with an insulator base table 17 which has a fixed contact terminal 13 having a fixed contact 12 that opposes a movable contact 4 when the coil assembly is arranged in the upper opening and the armature assembly is arranged thereupon, a neutral terminal 14 which connects with one end of the hinge spring part 5, and a bearing part 16 which supports the supporting axis 7. Hereby, assembling and adjustment can be easily executed.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electromagnetic relay.

[Conventional technology]

Conventionally, in this type of electromagnetic relay, as shown in FIGS. 3 and 4, fixed contacts 20 and permanent magnets 21 made of a magnetic material are fixed to an insulator base 30 that functions as a lower winding frame. Two external lead-out terminals 22 and a neutral terminal 23 made of a non-magnetic material are implanted, and both ends thereof face each of the external lead-out terminals 22, and a movable armature 24 that performs a tilting movement is provided with a movable contact 25. The contact spring 26 is fixed, and
The two hinge parts 27 of the movable contact spring 26 are fixed to the neutral terminal 23, an insulator cover 28 functioning as an upper winding frame is fixed, and a coil 29 is wound around the movable contact spring 26. A relay with such a configuration is disclosed in, for example, Japanese Patent Application Laid-open No. 59
It is described in the publication No.-130034.

[Problem that the invention seeks to solve]

The conventional 'gLm relay described above had the following problems due to its structure.

ill Since the armature 24 is directly excited by the coil 29, a space for movement of the armature is required within the winding part of the cover 28, so that high coil reduction efficiency cannot be achieved.

(2) High magnetic circuit efficiency cannot be achieved because the leakage magnetic flux is large and the magnetic flux path is not dense.

(3) After winding the coil 29, there is no adjustment means other than magnetization adjustment.

[Means for solving problems]

The t-magnetic relay of the present invention is as follows.

A coil assembly configured by arranging a permanent magnet near at least one of both ends of a U-shaped iron core around which a coil is wound; a hinge spring portion that supports a tilting motion in which both ends of the armature come into contact with and separate from both ends of the iron core; a support shaft that serves as a fulcrum for the tilting motion; and a tilting motion of the armature. An armature assembly in which a movable contact spring linked to movement is integrally fixed with an insulator.

A stationary device having a box-like shape with an upper opening, and having a stationary contact that faces a movable contact that the movable contact spring has when the coil assembly is disposed in the opening and the armature assembly is disposed thereon. An insulator base having a contact terminal, a neutral terminal provided to connect to one end of the hinge spring section, and a bearing section that supports the support shaft of the armature assembly. .

〔Example〕

Next, one embodiment of the present invention will be explained with reference to the drawings.

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2(a)
~(C) is a principle diagram of the magnetic circuit in the same example.

This embodiment shows a self-holding one-calm relay.

First, the principle will be explained with reference to FIGS. 2(a) to (C). Permanent magnets 2 are arranged inside both magnetic pole parts (both ends) la and 1b of the U-shaped core 1, and this pole part 1 a,
Both ends of the U-shaped armature 3 that performs a tilting motion are arranged so as to face each other. coil 1
In FIG. 2(a) showing the non-excited field state of No. 9, the armature 3 is attracted toward the magnetic pole portion lb by the magnetic flux 'Φ1 generated from one permanent magnet 2b. In FIG. 2(b), which shows the coil excitation state.

The magnetic flux Φ0 generated in the iron core 1 due to excitation cancels the magnetic flux Φl generated by one permanent magnet 2b, and is added to the magnetic flux Φ2 generated by the other permanent magnet 2a.
is tilted around fulcrum A and reversed in the other direction (clockwise). In this state, even if the excitation of the coil 19 is cut off, as shown in Fig. 2 (
As shown in C).

The armature 3 is attracted to the permanent magnet 2a by the magnetic flux Φ2. Further invert this state (i.e.

To achieve the effect shown in FIG. 2(a), the direction of the coil 'gm may be reversed. Note that it is desirable that the abutting portion between the iron core 1 and the armature 3 be at the center of the permanent magnets 2a, 2b in order to effectively utilize the retained magnetic flux.

Next, the overall structure of the 1-calm relay will be explained with reference to FIG. A movable contact spring 6 including a movable contact 4 and a hinge spring portion 5 and arranged on both sides of the U-shaped armature 3 and a tilting movement support shaft 7 are integrally fixed to the armature 3 by an insulating fixed body 8 to form an armature assembly. is configured. In addition, the hinge spring part 5
is formed into a crank shape to facilitate tilting of the armature 3.

A coil 19 is wound around a coil spool 10 in which a U-shaped iron core 1 and a coil terminal 9 are buried, and a permanent magnet 2a is inserted into a permanent magnet mounting hole provided inside both magnetic pole parts 1a and lb of the iron core 1. , 2b are fitted and fixed to form a coil assembly.

Furthermore, a fixed contact terminal 13 to which the fixed contact 12 is fixed.
Each of the neutral terminal 14 and the coil lead-out terminal 15 is buried, and a bearing portion 16 that engages with the support shaft 7 of the armature assembly is provided in a part of the inner wall to constitute an insulator base 17. .

After the above-described coil assembly is fitted and fixed inside this insulator base 17, the coil terminal 19 and the coil lead-out terminal 15 are connected by a method such as soldering. Further, the armature assembly is mounted by fixing the end of the hinge spring portion 5 and the neutral terminal 14. Finally, the cover 18 is attached to complete the assembly of the magnetic relay. In the relay with the above configuration,
According to the above-described operating principle, the movable contact 4 interlocked with the armature 3 and the fixed contact 12 are brought into contact and separated, and the electric circuit is switched.

Furthermore, when applying the present invention to a current holding type relay,
The shape or height of one permanent magnet.

Either change the cross-sectional area, etc., or remove one permanent magnet.
Alternatively, a magnetic gap such as a regal plate may be provided in one of the magnetic poles of the armature 3 or the iron core 1 to make the attractive force unbalanced between the two magnetic poles when not energized.

〔Effect of the invention〕

As explained above, in the present invention, permanent magnets are disposed inside both magnetic poles of a U-shaped iron core around which a coil is wound.

A magnetic circuit structure in which a tiltable U-shaped armature is arranged in the 100-pole part of an iron core so that both ends thereof face each other, and an assembly structure that effectively utilizes this magnetic circuit structure, that is, an armature, a hinge spring, By composing an armature assembly that integrates a movable contact spring, a coil assembly that is equipped with an iron core, permanent magnet, and coil terminals, and an insulator base that has external lead-out terminals embedded, the following effects can be achieved. have

(1) The magnetic flux of the permanent magnet can be used effectively, so the magnetic circuit is dense, and the magnetization efficiency is high, so it can be driven with high sensitivity.

(2) Because it is a combination of flat components.

The mounting height can be lowered.

(3) Since the hinge spring portion is exposed before the cover is put on, the spring load can be easily adjusted after assembly using the support spring portion. - As described above, an electromagnetic relay that is small, highly sensitive, and easy to assemble and adjust can be obtained.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2(a)
-(C) are principle diagrams of the magnetic circuit of the same embodiment, and FIGS. 3 and 4 are a sectional view and a partial plan view, respectively, showing the structure of a conventional electromagnetic relay. 1...Iron core, 1a, 1b...Magnetic pole part, 2a, 2b...Permanent magnet, 3...
Armature, 4...Movable contact, 5...Hinge spring portion, 6...Movable contact spring, 7...
・Support shaft, 8... Insulating fixing body, 9...
coil terminal. 10... Coil spool, 11... Permanent bleeding attachment hole, 12... Fixed contact, 13.
... Fixed contact terminal, 14 ... Neutral terminal,
15... Coil lead-out terminal, 16... Bearing part, 17... Insulator base, 18...
Cover, 19... Coil. Agent Patent Attorney Uchihara Oto J/ Diagram (b) (C) Kaya 2 Yan$ 4 Group

Claims (1)

[Scope of Claims] A coil assembly configured by arranging a permanent magnet near at least one of both ends of a U-shaped iron core around which a coil is wound; a U-shaped armature disposed so as to rotate; a hinge spring portion that supports a tilting motion in which both ends of the armature come into contact with and separate from both ends of the iron core; and a support shaft that serves as a fulcrum for the tilting motion; , an armature assembly in which a movable contact spring interlocked with the tilting movement of the armature is integrally fixed with an insulator; and a box-shaped armature assembly with an upper opening, the coil assembly being disposed in the opening, and the armature assembly having a box shape with an upper opening; a fixed contact terminal having a fixed contact facing the movable contact of the movable contact spring, a neutral terminal provided to be connected to one end of the hinge spring portion, and the armature assembly when the armature assembly is disposed in the armature assembly. An electromagnetic relay having a bearing part that supports a three-dimensional support shaft.