JPH041695Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" The present invention relates to the structure of an electromagnet.

``Prior Art'' Various types of electromagnets have been proposed in which the iron core and yoke are formed from a single magnetic plate. Figure 5 is an example, where 1 is the iron core, 2, 2' are the yoke, 3,
3' is the magnetic pole surface when the iron core 1 is excited, 4,
4' is the bent part, 5, 5' are the bent parts 4, 4'
This is a groove punched out to facilitate the bending process. Portions 6 and 6' indicated by broken lines in FIG. 6 are winding frame molds formed integrally with the yokes 2 and 2', respectively. FIG. 7 shows the state before the bending parts 4, 4' are bent. An electromagnet with this structure can be used as a small electromagnetic relay (for example, the height including the electromagnet part and the contact spring part is 5
mm), the width of the grooves 5, 5' will result in reducing the width or height of the yokes 2, 2'.
There was a problem in that it caused magnetic saturation, which limited the size of electromagnetic relays.

``Problems to be solved by the invention'' In order to solve the above-mentioned problems, the invention solves the above-mentioned problems. 2' can be molded from a single magnetic plate.

``Means for solving problems'' Therefore, the present invention is an electromagnet that forms yoke parts at both ends of an iron core around which a coil is wound, in which the iron core and the yoke are provided on one magnetic plate. It is formed by cutting and raising notches.

``Example'' Figures 1, 2, and 3 are perspective views of an electromagnet core and yoke according to the present invention, and Figure 4 is an exploded perspective view when the electromagnet according to the present invention is used in an electromagnetic relay. , parts that are the same as those in the past are given the same reference numerals to avoid duplication of explanation. 7 and 7' shown in Figure 3 are iron core 1
This is a notch made at the boundary line between the yokes 2 and 2'.
By bending the bent portions 4, 4', the iron core 1 and the yokes 2, 2' are formed from a single magnetic plate by cutting them at approximately right angles as shown in FIG. A coil is wound around the iron core 1 to constitute an electromagnet. An example of a case where an electromagnet having such a structure is employed in a small electromagnetic relay will be explained with reference to FIG. 4. 8 is a coil wound around the iron core 1, 9 and 9' are guide blocks added to both sides of one winding frame mold 6, and winding terminals 10 and 1.
0' is integrally molded. 11 is an armature, 1
2 is a hinge spring, 13 is the tip 11a of the armature 11
15 is a hole that engages with the engagement piece 13 of the armature 11 provided at the tip of the card 14, and 16 is a contact spring assembly (not shown). It is a convex part that opens and closes by pressing. To assemble this, the engaging piece 1 of the armature 11
3 and the engagement hole 15 of the card 14, and then
4 is a guide block 9 provided on the winding frame mold 6,
9', and between the tips 11a and 11 of the armature 11.
b are placed in positions where they abut the magnetic pole faces 3, 3' of the yokes 2, 2', and the tips 12a of the hinge springs 12 fixed to the armature 11 are attached to the yokes 2'. Next, to explain the operation,
Normally, the tip end 11a of the armature 11 is urged upward by the elasticity of the hinge spring 12, and the card 14 slides upward between the guide blocks 9, 9' and is held at a predetermined position. When the coil 8 wound around the iron core 1 is energized, the iron core 1 is energized and the magnetic pole surface 3 of the yoke 2 attracts the tip 11a of the armature 11 against the elasticity of the hinge spring 12, so that the card 14 is attached to the winding frame mold. It slides downward between the guide blocks 9 and 9' of No. 6. When the power to the coil 8 is stopped, the original state is restored. As can be seen from the above explanation, according to the present invention, the cross-sectional area of the magnetic path at the part where the iron core 1 and the yoke 2, 2' that provide an attractive force to the armature 11 are integrated is increased compared to the conventional one. do.

``Effects of the invention'' As explained above, according to the invention, the iron core and yoke are formed from a single magnetic plate without providing the grooves that were conventionally punched out to facilitate bending. , magnetic saturation is less likely to occur than in the past. Therefore, if the electromagnet according to the present invention is employed in an electromagnetic relay, an extremely compact electromagnetic relay can be obtained.

[Brief explanation of drawings]

Figures 1, 2, and 3 are perspective views of an iron core and yoke according to the technology of the present invention, Figure 4 is an exploded perspective view of an electromagnetic relay employing an electromagnet according to the present invention, and Figure 5.
FIGS. 6 and 7 are perspective views of an iron core and a yoke according to the prior art. 1... Iron core, 2, 2'... Yoke, 3, 3... Magnetic pole surface, 4, 4'... Bent part, 5, 5'... Groove,
6, 6'... Winding frame mold, 7, 7'... Notch, 8... Coil, 9, 9'... Guide block,
10, 10'... Winding terminal, 11... Armature, 1
2...hinge spring, 14...card.

Claims (1)

[Scope of utility model registration request] An electromagnet in which yoke parts are formed at both ends of an iron core around which a coil is wound, characterized in that the iron core and the yoke are formed by cutting and raising notches provided in a single magnetic plate. Electromagnet structure.