JPH0525152Y2 - - Google Patents

Description

[Detailed description of the invention] <Field of the invention> This invention relates to the insulation structure of an electromagnetic relay.

<Prior art and issues> As an electromagnetic relay, an iron core is fixed to a horizontal piece of an L-shaped yoke fixed to a base, an electrically insulating synthetic resin coil spool is fitted to this iron core, and the yoke and iron core are connected to each other. A coil constituting the electromagnet is wound around an iron core via the coil spool, and a contact mechanism is driven by an L-shaped movable iron piece swingably supported on the tip side of the vertical piece of the yoke. There is something. When it is desired to improve the insulation between the movable iron piece and the coil, a surrounding wall portion that substantially surrounds the adsorption piece portion of the movable iron piece may be integrally formed on the upper flange portion of the coil spool.

By the way, in order to obtain proper contact follow-up,
When adjusting the gap between the magnetic pole surface constituted by the tip of the iron core and the adsorption piece portion of the movable iron piece, a plate-shaped spacer member for adjustment must be inserted into the gap. For this reason, in the past, a notch for inserting a spacer member was formed on the front side of the surrounding wall, but this notch reduced the insulation between the coil and the adsorption piece of the movable iron piece. was inviting.

<Purpose of the invention> This invention was made in order to solve the problems of the above-mentioned conventional ones.The purpose of this invention is to provide an electromagnetic relay that can adjust the gap between the movable iron piece and the iron core, and can improve the electrical insulation. The purpose is

<Structure and effects of the invention> The electromagnetic relay according to the invention has an electromagnet disposed within a case consisting of a base and a cover, and an adsorption piece of a movable iron piece pivotably supported on one end of a yoke of the electromagnet. An enclosing wall that almost surrounds the periphery is integrally formed with the collar of the electrically insulating synthetic resin coil spool in the electromagnet, and a part of the enclosing wall is provided between the magnetic pole face of the electromagnet and the adsorption piece. A spacer member for adjusting the gap forms a removable notch, and when the cover is fitted to the base, it fits into the notch and connects the coil in the electromagnet and the movable iron piece with the surrounding wall. An electrically insulating fitting wall part that constitutes an electrically insulating barrier part between the adsorption piece part is formed on the inner wall of the cover.

According to this invention, since a notch is formed in a part of the enclosure wall integrally formed with the collar of the coil spool, a spacer member can be inserted through this notch before fitting the cover, and the spacer member can be inserted into the adsorption piece of the movable iron piece. The gap between the electromagnet and the magnetic pole surface can be adjusted.
Moreover, when the cover is fitted to the base, the fitting wall part on the cover side fits into the notch part to form a barrier part which almost surrounds the periphery of the adsorption piece part.
The insulation between the coil and the movable iron piece is ensured.

<Description of Examples> Examples of this invention will be described below with reference to the drawings.

1 and 2 are a perspective view and a side sectional view, respectively, showing an example of the electromagnetic relay according to the invention with the cover removed.

In the figure, reference numeral 1 denotes a case, which includes an electrically insulating synthetic resin base 2 and an electrically insulating synthetic resin cover 3 fitted onto the base 2. As shown in FIG. 4
is an electromagnet placed on the base 2, and the electromagnet 4 is composed of an L-shaped yoke 5, an iron core 6, a coil 7, and the like. The base 6a of the iron core 6 is fixed to the horizontal piece 5a of the yoke 5 by caulking. The coil 7 is wound around the outer periphery of the iron core 6 via a coil spool 8 made of electrically insulating synthetic resin that is fitted onto the iron core 6. Coil spool 8
The lower flange portion of is integrally formed with the base 2.

Reference numeral 9 denotes an L-shaped movable iron piece, which consists of an adsorption piece 9a and an operation piece 9b facing the tip 6b of the iron core 6 that constitutes the magnetic pole surface of the electromagnet 4, and the inside of the bent corner 9c is as described above. It is pivotally supported on the tip end corner 5c of the vertical piece 5b of the yoke 5 so as to be swingable. Reference numeral 10 designates a hinge spring attached to the vertical piece 5b of the yoke 5, and elastically presses the bent corner 9c of the movable iron piece 9 with a pressing portion 10a on the tip side.

The base 2 is provided with normally open fixed and movable contact pieces 10 and 11, and the movable contact piece 10 is driven by the operation piece portion 9b of the movable iron piece 9. Reference numerals 12 and 13 denote normally open and movable contacts fixed to the tips of the normally open fixed and movable contact pieces 10 and 11, respectively, and together with the normally open fixed and movable contact pieces 10 and 11, they constitute a contact mechanism 14. are doing.

A surrounding wall portion 15 surrounding the suction piece portion 9a of the movable iron piece 9 is integrally formed on the periphery of the upper flange portion 8a of the coil spool 8. The front side of this enclosure wall portion 15 and a portion of both sides adjacent thereto are open in a U-shape as a notch portion 16.
The adsorption piece 9a of the movable iron piece 9 and the tip 6 of the iron core 6
It is set as an insertion/removal port for a spacer member M for adjusting the gap between the opening and the opening. 17 is the above-mentioned notch 1
6 is a U-shaped fitting wall part integrally formed on the inner surface of the upper wall of the cover 3, and when the cover 3 is fitted to the base 2, it fits into the cutout part 16 and the coil 7 and the suction piece portion 9a of the movable iron piece 9
It constitutes an electrically insulating barrier section 18 between the two.

In the figure, reference numerals 19 and 19 indicate a pair of coil terminals fixed to the base 2.

Next, the operation of the above configuration will be explained.

When the coil 7 is magnetically excited, the iron core 6 is magnetized, and the attraction piece portion 9a of the movable iron piece 9 is attracted to the tip (magnetic pole surface) 6b of the iron core 6. Therefore, the movable iron piece 9 rotates clockwise about the tip corner 5c of the vertical piece 5b of the yoke 5, and the movable contact piece 11 is bent by the operating piece 9b of the movable iron piece 9, making it movable. The contact 13 and the normally open fixed contact 12 are closed. When the coil 7 is de-energized, the movable contact piece 11 returns with its own spring, and the movable contact 13 and the normally open fixed contact 1
2 is opened.

Here, when the cover 3 is fitted to the base 2, the fitting wall 17 on the cover 3 side fits into the notch 16 of the surrounding wall 15 formed on the upper collar 8a of the coil spool 8. As shown in FIG. 3A, a barrier portion 18 is configured to surround the adsorption piece portion 9a of the movable iron piece 9. Therefore, this barrier portion 18 can ensure insulation between the movable iron piece 9 and the coil 7.

Moreover, the adsorption piece part 9a of the movable iron piece 9 and the iron core 6
The gap between the tip 6b and the tip 6b can be adjusted with the cover 3 removed. That is, when the cover 3 is removed, the notch 16 of the surrounding wall 15 is opened as shown in FIG. It can be inserted between the suction piece 9a and the tip 6b of the iron core 6.

In the above embodiment, the notch 16 on the side of the enclosure wall 15 and the fitting wall 17 on the side of the cover 3 are U-shaped, but this shape can be changed as appropriate.

Further, in the above embodiment, the fitting wall portion 17 is formed integrally with the cover 3, but a separate fitting wall portion 17 may be provided on the cover 3.

[Brief explanation of drawings]

FIGS. 1 and 2 are a perspective view and a side sectional view, respectively, with the cover removed, showing an example of the electromagnetic relay according to this invention, and FIGS. 3A and 3B are action explanatory views of the main parts of the same electromagnetic relay, respectively. . 1...Case, 2...Base, 3...Cover,
4...Electromagnet, 5...Yoke, 6b...Magnetic pole surface,
7... Coil, 8... Coil spool, 8a...
Flange part, 9...Movable iron piece, 9a...Adsorption piece part, 1
5... Enclosing wall part, 16... Notch part, 17... Fitting wall part, 18... Barrier part, G... Gap, M...
...Spacer member.

Claims (1)

[Scope of utility model registration request] The collar of the electrically insulating synthetic resin coil spool in the electromagnet placed in a case consisting of a base and a cover has an enclosure that almost surrounds the adsorption piece of the movable iron piece that is swingably supported on the yoke of the electromagnet. The wall portion is integrally formed, and a notch portion is formed in a part of the enclosing wall portion, into which a spacer member for adjusting the gap between the adsorption piece portion and the magnetic pole face of the electromagnet can be inserted and removed, and the cover is fitted onto the base. an electrically insulating fitting wall that fits into the notch in the attached state and forms an electrically insulating barrier part between the coil of the electromagnet and the adsorption piece part of the movable iron piece together with the surrounding wall part; An electromagnetic relay characterized in that a portion is formed on an inner wall of the cover.