JP3109098B2 - Electromagnetic relay - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay that can be disassembled after assembly.

(Prior Art) Conventionally, as an electromagnetic relay, as shown in FIG. 5, a coil block 2 is housed in a box-shaped base 1, and a movable block 3 is mounted on the coil block 2 so as to be swingable. There is a case 4 covered.

The coil block 2 is formed by bringing a permanent magnet 6 into contact with a central portion of a substantially U-shaped iron core 5, integrating it with a spool 7, and winding a coil 8. And the base 1
When the coil terminal is housed, the coil terminal portion 9 is brought into contact with the terminal portion 10 exposed on the side wall of the base 1 and both are fixed by spot welding.

(Problems to be Solved by the Invention) However, since the electromagnetic relay has a structure in which the coil block 2 is fixed to the base 1 by welding the terminal portions 9 and 10, even if the coil 8 is disconnected, etc. Even if a failure is detected, only the coil block 2 cannot be replaced. That is, even if one part is defective, once assembled, it cannot be disassembled and the other parts must be discarded together, resulting in poor yield.

Further, in the electromagnetic relay, after the coil block 2 is mounted on the base 1, it is necessary to weld the terminals 9, 10 in a separate step, which makes assembly work difficult and costly.

Accordingly, an object of the present invention is to provide an electromagnetic relay that has a good yield and does not require assembling cost by making a coil block detachable from a base.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an electromagnetic relay in which a coil block having a coil terminal integrated with a flange portion of a spool is mounted on a base, wherein the coil block and the base are A contact opening / closing mechanism is disposed between the coil terminal and the leg of the coil terminal from the flange.
The flange is projected in a direction substantially perpendicular to the end face thereof, an insulating plate is integrated with an intermediate portion thereof, and a portion between the end face of the flange and the insulating plate is bent toward the base, The coil terminal is projected downward from the base together with the terminal extending from the contact opening / closing mechanism by detachably engaging the engaging portion provided on the insulating plate with the engaging receiving portion provided on the base.

(Operation) Therefore, the coil block can be easily attached to the base only by locking the engagement portion and the engagement receiving portion. Conversely, if the coil block or the like has a defect,
The coil block can be easily removed from the base simply by releasing the lock.

(Embodiment) Next, an embodiment of the electromagnetic relay according to the present invention will be described with reference to FIG. 1 to FIG.

This electromagnetic relay generally includes a first base block 20, a movable block 30, a second base block 40, and a coil block 50.
And case 70.

The first base block 20 is a substantially rectangular plate and has pedestals 21 at four corners. Claw portions 22 as engagement receiving portions extend from these pedestal portions 21 in the directions of arrows A and A ', respectively. And a claw portion extending from each short side
22, 22 are protruding in the direction in which the tips
2 itself is elastically deformable. The pedestal 2
A groove 24 having a first guide portion 23 is provided on each side surface, and a projection 24a projects from each groove 24.

Further, common terminals 25, 25 are respectively insert-molded at the center portions of the opposed long side edges of the first base block 20. The common terminals 25, 25 project from the upper surface of the first base block 20 a welding portion 26 having a substantially T-shaped upper portion bent. A groove 27 is formed in the center of the upper surface of the welded portion 26 in the directions of arrows B and B '. Further, the first base block 20 has a second guide portion 28 protruding near both sides of the welded portions 26, 26,
A pair of protruding portions 29, 29 protrude from a portion located between 5, 25. In addition, the protrusions 29, 29 are movable block 3 described below.
This is for preventing the connecting portion 34 from being deformed when 0 receives a vertical impact load.

In the movable block 30, movable contact pieces 32 are juxtaposed on both sides of a movable iron piece 31, and are integrally formed by a support portion 33 made of a resin material. The movable iron piece 31 has a generally I-shape in which a portion except for both ends is narrow, while the movable contact piece 32 is formed of a conductive thin plate and is bent into a shape along a side surface of the movable iron piece 31. . Further, movable contacts 36 having a so-called twin structure are provided at both ends of the movable contact piece 32, respectively.
From the center of the movable contact piece 32, a substantially T-shaped connecting portion 34
Extends.

A recess 35 is provided at the center of the upper surface side of the support portion 33, and the center of the upper surface of the movable iron piece 31 is exposed.

The second base block 40 is formed by insert-molding fixed contact pieces 43 at four corners of a rectangular plate 42 made of an insulating resin material. A long hole 41 extending in the directions of arrows B and B 'is provided at the center of the second base block 40, and engagement grooves 49 and 49 are provided at the center of both short sides, respectively. A pair of protrusions 49a, 49a are formed in the grooves 49, 49 by arrows A, A '.
Projecting in the direction. The legs 44 of the fixed contact piece 43 project downward in the engagement recesses 48 of the base 47 provided at the four lower corners of the plate-like body 42. Further, a through hole 45 is provided in an upper portion of these leg portions 44.

The ends of the fixed contact pieces 43 protrude from the short side end surfaces of the plate-like body 42 in the directions of arrows A and A ', respectively, and fixed contacts 46 are provided on the lower surfaces of the end portions.

The coil block 50 bends one end of a substantially U-shaped iron core 51 outward, abuts a permanent magnet 52 at the center, and integrates it with a spool 53 made of an insulating resin material. It is wound (see FIG. 2). Coil ends 56, 56 are insert-molded at upper ends of flanges 55, 59 formed at both ends of the spool 53, and steps 55a, 59a are formed at lower ends. The coil terminal 5
The upper end of 6 serves as a coil lead wire extending portion 57, 57 and protrudes upward from the flange portion 55, 59 of the spool 53.

On the other hand, in the leg portion 58 of the coil terminal 56, an intermediate portion between the adjacent coil terminals 56, 56 is insert-molded on the side plate 65 simultaneously with the above-described insert molding. This side plate 65 has a through hole 66 for contact follow measurement,
The outer end has a wide portion 67 having a large width. The base of the wide portion 67 is provided with engaging portions 67a, 67a to which the tip of the claw portion 22 is locked.

Before the coil terminal 56 is attached to the first coil block 20, the leg portions 58 extend in the directions of arrows A and A ', and are bent at the time of attachment as shown in FIG.

Among the coil terminals 56, the one provided on the flange 59 is a dummy that does not wind the coil 54.

The case 70 has a box shape with an open lower surface, and a gas vent hole 71 is provided in the center of one short side of the ceiling surface.

Next, an operation of assembling the electromagnetic relay having the above configuration will be described.

First, the movable block 30 is placed on the first base block 20 by contacting the welded portion 26 of the common terminal 25 while guiding the connection portion 34 of the movable block 30 by the first guide portion 28. Then, by welding the connecting portion 34 and the welding portion 26, the movable block 30 is rotatably supported with the connecting portion 34 as a fulcrum.

Next, the second base block 40 is replaced with the first base block 20.
Assemble to. In this assembly, first, the leg of the fixed contact piece 43
44 is elastically deformed in the directions of arrows B and B 'by pressing it against the side surface of the first base block 20 and expanding it. Then, the through hole 45 provided in the leg portion 44 is engaged with the projection 24a of the first base block 20, and the leg portion 44 is returned to the original shape. As a result, the horizontally bent portion of the leg portion 44 contacts the lower surface of the first base block 20, so that
The second base block 40 is temporarily fixed to the first base block 20.

Then, the protrusions 24a are heat-sealed to fix the second base block 40 to the first base block 20.

Subsequently, the coil block 50 is assembled. At the time of this assembly, the leg portions 58 of the coil terminals 56 are in a state of extending in the directions of arrows A and A '.

Therefore, first, the steps 55a and 59a of the flanges 55 and 59 of the spool 53 are engaged with the engagement grooves 49 of the first base block 20, and the spool 53 is positioned on the second base block 40. Then, it is bent to the leg portion 58 and the engagement portion of the side plate 65 is formed.
The coil block 50 is fixed to the first base block 20 by locking the 67a to the claw portion 22 of the first base block 20.

Then, a non-magnetic thin plate is inserted through the through hole 66 provided in the side plate 65, and the contact follow measurement is performed. Here, if the desired contact follow cannot be obtained, the claw 22 of the first base block 20 is bent to release the engagement with the engaging portion 67 of the side plate 65, and the coil block 50 is removed. Fixed contact piece with fixed contact 46 after removal
Adjust by adjusting the horizontal tip of 43.

Finally, the ceiling surface of the case 70 is
After fitting to the first base block 20 by contacting the upper surface of the first base block 20 and sealing the fitted portion with a sealing member,
The assembling operation is completed by extracting the internal gas from the substrate and performing heat sealing.

The electromagnetic relay assembled in this way is a coil
In the non-excited state where no voltage is applied to 54, one end of the iron core 51 of the coil block 50 is bent outward, and its area is larger than the other, disturbing the magnetic balance. The iron piece 31 rotates to one side, and one movable contact 36 is closed to the other fixed contact 46.

Therefore, when a voltage is applied to the coil 54 to excite the coil block 50 from this state, the movable iron piece 31 rotates to close the other movable contact 36 to the other fixed contact 46, and the contacts 36, 46 Separates. Conversely, when the excitation is released, the movable iron piece 31 returns to the original position again.

In the present embodiment, dummy coil terminals 56, 5
6 was integrated, but one for each flange 55, 59.
The coil terminals 56 may be integrated one by one, and side plates each having an engaging portion may be integrated.

(Effects of the Invention) As is clear from the above description, the electromagnetic relay according to the present invention has a simple structure in which the engagement receiving portion of the coil block is locked to the engagement portion of the base, so that the assembling work is performed. And the production efficiency is improved, so that the cost can be reduced.

Further, even after the assembly, it is possible to easily disassemble by releasing the lock, so that only defective products can be replaced, and the yield is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an electromagnetic relay according to the present invention, FIG. 2 is a front sectional view, FIG. 3 is a plan sectional view, FIG. 4 is a side sectional view, and FIG. It is an exploded perspective view. 20 first base block, 22 claw portion, 30 movable block, 31 movable iron piece, 32 movable contact piece, 36 movable contact, 40 second base block, 46 Fixed contacts,
50: Coil block, 54: Coil, 56: Coil terminal, 67a: Engagement part.

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Ikuo Takegahara 10 Okado Dodo-cho, Ukyo-ku, Kyoto-shi, Kyoto Omron Corporation 63-1443841 (JP, U) Jiko 55-31773 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 50/04 H01H 50/14 H01H 50/44

Claims (1)

(57) [Claims] An electromagnetic relay in which a coil block having a coil terminal integrated with a flange portion of a spool is mounted on a base, wherein a contact opening / closing mechanism is provided between the coil block and the base. A leg is projected from the flange in a direction substantially perpendicular to an end surface of the flange, and an insulating plate is integrated at an intermediate portion of the leg, and a base is provided at a portion between the end surface of the flange and the insulating plate. Bend to the side,
By detachably engaging the engaging portion provided on the insulating plate with the engaging receiving portion provided on the base, the coil terminal is projected downward from the base together with the terminal extending from the contact opening / closing mechanism. Electromagnetic relay.