JPH08162322A - Electromagnet device - Google Patents

Abstract

PURPOSE: To make it possible to assemble an iron core to a spool with a high positioning accuracy with less labor for production by providing a simple construction for forming dies. CONSTITUTION: A groove 14 is provided in a drum portion 11 of a spool 10 along the center of axis, and a coil winding portion 23 for an iron core 20 is pressed in the groove 14 for retaining said portion. Then, a coil is wound around the drum 11 of the spool 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnet device, and more particularly to a structure for mounting an iron core on a spool thereof.

[0002]

2. Description of the Related Art Conventionally, as an electromagnet device, there is an electromagnet device for an electromagnetic relay disclosed in Japanese Patent Laid-Open No. 5-101763. That is,
An intermediate portion of an iron core having a substantially U-shaped cross section having wide magnetic pole portions at both ends is insert-formed in the body of the spool, and a coil is wound around the body of the spool.

However, if an attempt is made to insert-mold an iron core having a substantially U-shaped cross section into the body of the spool as described above, the structure of the molding die becomes complicated and it takes time to manufacture the die. However, there is a problem that it is not easy to insert-mold the iron core on the spool with high positioning accuracy.

In view of the above problems, it is an object of the present invention to provide an electromagnet device in which the structure of the molding die is simple, the manufacturing is trouble-free, and the iron core can be assembled to the spool with high positioning accuracy. And

[0005]

In order to achieve the above-mentioned object, an electromagnet device according to the present invention is an electromagnet device in which a coil is wound around the body of a spool holding an iron core. The iron core is press-fitted and held in a press-fitting groove along the axis.

Further, a locking claw may be provided so as to project from an opening edge portion of the inner side surfaces of the press-fitting groove which face each other, and further, the press-fitting groove located below the locking claw. You may arrange | position the through-hole for mold removal in the bottom face.

[0007]

Therefore, according to the first aspect of the present invention, the iron core can be press-fitted and held in the press-fitting groove provided in the body portion of the spool. Therefore, according to the present invention,
There is no need to insert-mold an iron core on the spool body, and the spool body can be molded with a pair of upper and lower molds, which simplifies the structure of the molding mold, and therefore does not require much time to manufacture the mold. Therefore, the manufacturing cost of the mold can be reduced, the dimensional accuracy of the spool can be increased, and the iron core can be assembled to the spool with high positioning accuracy.

According to the second aspect of the invention, the iron claws are prevented from coming off by the locking claws provided in the press-fitting grooves, the iron cores can be prevented from falling off, and the positioning accuracy of the iron cores with respect to the spool can be improved.

Further, according to the third aspect, even when the locking projection is provided in the press-fitting groove, the spool can be formed by a pair of molds that are pulled out from the vertical direction, so that the structure of the mold is further simplified. In addition, the manufacturing cost of the mold can be reduced, and the positioning accuracy can be improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings of FIGS. In the electromagnet device according to the present embodiment, the iron core 20 is press-fitted into the spool 10 and the coil 30 is wound.

The spool 10 has collars 12 and 13 formed on both ends of a body 11, and the body 11 is provided with a press-fitting groove 14 opening upward. Out of the inner surfaces of the press-fitting groove 14 that face each other, locking claws 15 and 16 are provided so as to face the opening edges thereof.
Further, through holes 17 for die removal are arranged on the bottom surface of the press-fitting groove 14 located below the locking claws 15 and 16 (FIG. 2).

Further, of the collar portions 12 and 13 provided at both ends of the body portion 11, one of the collar portions 12 has a pair of ridges 18 for press-fitting and holding the coil terminals 31 and 32 on the end faces thereof. , 19 are formed. Terminal holes 18 into which the coil terminals 31 and 32 can be press-fitted and held in the ridges 18 and 19, respectively.
a and 19a are formed (FIG. 2). Further, guide grooves 12a for guiding the lead lines of the coil 30 are formed on both side surfaces of the flange portion 12 (the guide groove 12a on the back side in FIG. 1 is not shown).

The iron core 20 has a wide magnetic pole portion 2 at both ends.
The coil winding portion 23 located between the magnetic pole portions 21 and 22 is made of a magnetic material having a substantially U-shaped cross section and has a press-fitting groove 1 provided in the body portion 11 of the spool 10.
It has a cross-sectional shape that can be press-fitted into the spool 4, and is retained by the locking claws 15 and 16 of the spool 10.

Then, the coil winding portion 23 of the iron core 20 is press-fitted and held in the press-fitting groove 14 of the spool 10,
The coil terminals 31 and 32 are press-fitted into the terminal holes 18a and 19a of the ridges 18 and 19 provided in the above. Further, after bending one end of the coil 30 to the twisted portion 31a of the coil terminal 31, the coil 30 is attached to the body portion 11 of the spool 10 along one guide groove 12a (not shown) provided in the collar portion 12. Then, the lead wire of the coil 30 is drawn out through the other guide groove 12a of the flange portion 12, and the lead wire is pulled out from the lead portion 32a of the coil terminal 32, and the lead portions 31a and 32a are soldered. As a result, the electromagnet device is completed.

In the above-described embodiment, the engaging claw 1 is arranged so as to face the opening edge portion of the inner surfaces of the press-fitting groove 14 which face each other.
Although the case where 5 and 16 are provided has been described, the present invention is not limited to this, and the locking claw may be provided only at least on the opening edge portion of the inner surface on one side. In addition, the coil winding portion 2 of the iron core 20
The cross section 3 is not limited to a square cross section, and may be, for example, a circular cross section or an elliptical cross section.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an electromagnet device according to the present invention.

2 is a plan view of the spool shown in FIG. 1. FIG.

3 is a front view of the spool shown in FIG. 1. FIG.

FIG. 4 is a left side view of the spool shown in FIG.

5 is a right side view of the spool shown in FIG. 1. FIG.

FIG. 6 is a cross-sectional view of the electromagnet device showing a state where an iron core is incorporated.

[Explanation of symbols]

10 ... Spool, 11 ... Body, 14 ... Press fit groove, 15, 1
6 ... Locking claw, 17 ... Through hole, 20 ... Iron core, 30 ... Coil.

Claims (3)

[Claims] 1. An electromagnet device in which a coil is wound around a body of a spool that holds an iron core, wherein the iron core is press-fitted and held in a press-fitting groove along an axis provided in the body of the spool. Characterized electromagnet device. 2. The electromagnet device according to claim 1, wherein a locking claw is provided so as to project from an opening edge portion of the inner side surfaces of the press-fitting groove which face each other. 3. The electromagnet device according to claim 1, wherein a through hole for die removal is arranged on a bottom surface of the press-fitting groove located below the locking claw.