JPS63301441A - 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 rely using a magnetic circuit structure where a permanent magnet is provided at the inside central part of a U letter-shaped iron core round which a coil is wound and an armature capable of inclining 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 a permanent magnet 2 is arranged at the central part 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 an armature 3 which is so arranged that the self both ends may be opposed to both ends of an iron core 1 and a movable contact spring 6 are fixed in a body with an insulator 7. And, it is equipped with an insulator base table 16 where a fixed contact terminal 13, which has 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 so that one end of the permanent magnet 2 may be a fulcrum for the inclining action of the armature 3, and a neutral terminal 14, which connects with one end of the hinge spring 5, are planted. Hereby, the magnetic circuit becomes dense and the magnetic efficiency is improved, therefore it can be driven at high sensitivity.

Description

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

[Conventional technology]

Conventionally, this type of electromagnetic relay has fixed contacts 20 and permanent magnets 21 made of a magnetic material fixed to an insulator base 30 having the function of a lower winding frame, as shown in FIGS. 3 and 4. A movable motor, in which two external lead-out terminals 22 and a neutral terminal 23 made of a non-magnetic material are implanted, and both ends of the external lead-out terminals 22 face each other, and a movable contact 25 is provided on an armature 24 that performs a tilting motion. After 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, the insulator cover 2 having the function of an upper winding frame is installed.
8 is fixed and a coil 29 is wound around it. A relay with such a configuration is disclosed in, for example, Japanese Patent Application Laid-Open No. 59-1300.
It is described in Publication No. 34.

[Problem that the invention seeks to solve]

The conventional electromagnetic relay described above has the following problems due to its structure.

(1) Since the armature 24 is directly excited, a space for movement of the armature is required within the winding portion of the cover 28, and high coil magnetization efficiency cannot be achieved.

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

(3) After 290 turns of the coil, there is no adjustment means other than magnetization adjustment.

[Failure to solve the problem]

The electromagnetic relay of the present invention is as follows.

A coil assembly configured by arranging a permanent magnet in the center of a U-shaped iron core around which a coil is wound, an armature arranged such that both ends of the armature face opposite ends of the armature, and this armature. An armature assembly in which a hinge spring part that supports a tilting movement in which both ends of the pole come into contact with and separate from both ends of the iron core, and a movable contact spring that moves in conjunction with the tilting movement of the armature are integrally fixed with an insulator. and the armature assembly has a box shape with an upper opening, the coil assembly is disposed in the opening, and the armature assembly is disposed such that one end of the permanent magnet serves as a fulcrum for tilting movement of the armature. The movable contact spring further comprises: a fixed contact terminal having a fixed contact facing the movable contact of the movable contact spring; and an insulator base having a neutral terminal connected to one end of the hinge spring section. .

〔Example〕

Next, 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 type electromagnetic relay. First, the principle will be explained with reference to FIGS. 2(a) to (C).
A permanent magnet 2 is arranged at the center inside the U-shaped iron core 1, and both ends of an armature 3 that performs a tilting motion are arranged to face the magnetic pole parts 1a, 1b at both ends, respectively. In FIG. 2(a), which shows the coil 19 in its non-moving, low state, the armature 3 is attracted toward one magnetic pole portion 1b by the magnetic flux Φ1 generated by the permanent magnet 2. In FIG. 2(b) showing the coil excitation state, the magnetic flux Φ0 generated in the iron core 1 due to excitation cancels the magnetic flux Φ1, and the other end 1a of the armature 3
As a result, the iron core 1 tilts around the fulcrum A and reverses in the other direction (clockwise). In this state, even if the excitation of the coil 19 is cut off, the armature 3 is attracted to the magnetic pole la side by the magnetic flux Φ2, as shown in FIG. 2(C). Furthermore, in order to reverse this state (ie, as shown in FIG. 2(a)), the direction of the coil current may be reversed.

Next, the overall structure of the electromagnetic relay will be explained with reference to FIG. A movable contact 4 and a movable contact spring 6 having a hinge spring portion 5 are integrally fixed by an insulating fixture 7 so as to be disposed on both sides of the armature 3, thereby forming an armature assembly.

Note that the hinge spring portion 5 is formed in a crank shape to facilitate tilting of the armature 3.

A coil 19 is wound around a coil spool 9 in which a U-shaped iron core 1 and a coil terminal 8 are buried, and a permanent magnet 2 and an armature 3 are inserted into a permanent magnet mounting hole 18 provided at the inner center of the iron core 1. A coil assembly is constructed by fixing a magnetic piece 11 that serves as a fulcrum for the tilting movement of the coil assembly.

Furthermore, 13% of the fixed contact terminals to which the fixed contacts 12 are fixed
The neutral terminal 14 and the coil lead-out terminal 15 are each buried to form an insulator base 16.

After the above-described coil assembly is fitted and fixed inside the insulator base 16, the coil terminal 8 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 17 is attached to complete the assembly of the electromagnetic relay. In the relay having the above configuration, the movable contact 4 and the fixed contact 12 interlocked with the armature 3 are brought into contact and separated, and the electric circuit is switched, according to the above-described operating principle.

Furthermore, when applying the present invention to a current holding type relay,
A magnetic gap such as a regal plate may be provided in one of the magnetic poles of the connector 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, a permanent magnet is disposed at the center inside the U-shaped core around which the coil is wound.

A magnetic circuit structure in which a tilting armature is arranged so that both ends thereof face both magnetic pole parts of an iron core, and

An assembly structure that effectively utilizes this magnetic circuit structure includes an armature assembly that integrates an armature, a hinge spring, and a movable contact spring, a coil assembly that is equipped with an iron core, a permanent magnet, and a coil terminal, and an external lead-out. The structure with an insulator base with embedded terminals has the following effects.

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

(2) Since it is a combination of flat components, the mounting height can be reduced.

(3) Since the hinge spring part is exposed before the cover is put on, the spring load can be easily adjusted after assembly using the support spring part.

As described above, an electromagnetic relay that is small, highly sensitive, and easy to assemble and adjust can be obtained.

[Brief explanation of the drawing]

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, 2...Permanent magnet, 3...
...Archive. 4... Movable contact, 5... Hinge spring portion, 6... Movable contact spring, 7... Insulating fixed body, 11... magnetic piece. 8...Coil terminal %9...Group/coil spool%12...Top fixed contact, 13...Fixed terminal,
14... Neutral terminal, 15... Coil lead-out terminal, 16... Insulator base, 17...
・Cover, 18...Permanent magnet mounting hole, 19
······coil. Agent Patent Attorney Shinjun Uchihara 1 Possible (b) (C1 Kaya 2M

Claims (1)

[Scope of Claims] A coil assembly configured by arranging a permanent magnet in the center of a U-shaped iron core around which a coil is wound, and a coil assembly arranged such that both ends of the coil assembly face opposite ends of the iron core. an armature; 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;
an armature assembly in which a movable contact spring that interlocks with the tilting movement of the armature is fixed integrally with an insulator; the armature assembly has a box shape with an upper opening, the coil assembly is disposed in the opening, and the permanent magnet When the armature assembly is arranged such that one end serves as a fulcrum for the tilting movement of the armature, a fixed contact terminal having a fixed contact facing the movable contact of the movable contact spring and one end of the hinge spring portion. An electromagnetic relay comprising: an insulator base having a neutral terminal to be connected embedded therein;