JPH0584646B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electromagnet device, and more particularly to an electromagnet device in which an armature is swingably disposed about its substantially central portion as a fulcrum.

[Background Art] Generally, in this type of electromagnetic device, the armature is supported so as to be able to swing freely relative to the iron core by supporting the rotating shaft provided on the armature with a bearing provided on the base that constitutes the casing. It is something that However, when assembling the product, if the coil block containing the iron core is not accurately positioned in the predetermined position within the casing, the ends of the armature will not correspond to the magnetic poles of the iron core, resulting in unstable characteristics such as attraction force. There is a problem with becoming. Particularly in small electromagnetic devices, it is difficult to accurately position the coil block within the casing, making it difficult to stabilize the characteristics of the product.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and its main purpose is to support the fulcrum part of the armature with a shaft support formed in the coil block. To provide an electromagnet device in which the positional relationship between an armature and an iron core can be accurately determined and characteristics such as attractive force are stable.

[Disclosure of the Invention] Examples Examples of the present invention will be described below based on the drawings. As shown in FIGS. 1 and 2, the coil block 1 has a substantially U-shaped iron core 11 that is open upward.
, a cylindrical coil frame 12 formed of a molded product into which the intermediate piece of the iron core 11 is inserted, and a coil 13 wound around the coil frame 12. The iron core 11 and the coil frame 12 are integrally molded,
The coil frame 12 has flanges 17 at both ends in the axial direction, and a support base 1 on the outer periphery of the substantially central part in the axial direction.
It is integrally molded in a shape with 4. Support stand 1
4 has an open upper surface to form a magnet insertion groove 15, and a fulcrum receiving groove 18 is provided as a shaft support at the opening edge of the magnet insertion groove 15 and at both ends in a direction orthogonal to the axial direction of the coil frame 12. is formed. Inside the magnet insertion groove 15 is a rectangular parallelepiped magnet piece 16 magnetized in the vertical direction, with one magnetic pole surface in contact with the iron core 11 and the other magnetic pole surface aligned with the lower end of the fulcrum receiving groove 18 . will be inserted. Here, since the support stand 14 is formed approximately at the center of the coil frame 12 in the axial direction, the coil 13 is wound around both ends of the coil frame 12 with the support stand 14 in between.

The armature block 2 includes an armature 21 formed in a substantially rectangular flat plate shape and made of a magnetic material, and an armature 2 at approximately the center of the armature 21 in the longitudinal direction.
1 and a support member 22, which is a molded product, integrally molded with the support member 22. Rotating shafts 23 serving as fulcrum portions are integrally protruded from both ends of the armature 21 in the width direction and from the side surfaces of the support member 22, respectively, and the rotating shafts 23 are fitted into the fulcrum receiving grooves 18 of the coil block 1. Once installed, the armature block 2 is supported so as to be swingable relative to the coil block 1. With the armature block 2 supported by the coil block 1, the armature 21
The lower surfaces of both ends in the longitudinal direction face each magnetic pole surface of the iron core 11, respectively.

With the above configuration, if the coil 13 is energized,
Depending on the direction of magnetization, one end of the armature 21 in the longitudinal direction is attracted to one of the magnetic poles of the iron core 11, and the armature block 2 swings, causing the iron core 11 → armature 21 → magnet piece 16 → iron core 11 to close. A path is formed. Even if the current to the coil 13 is stopped, a closed magnetic path is formed by the magnetic force of the magnet piece 16, and the state in which the armature 21 is magnetized to the iron core 11 is maintained, resulting in so-called bistable operation. However, it is also possible to achieve monostable operation by applying a spring bias to the armature block 2 in an appropriate direction. Also, coil block 1
Since the armature block 2 and the armature block 2 are accurately positioned, characteristics such as attraction force are stable, and when used as an electromagnetic device for driving contacts of a relay, stable operation can be performed.

[Effects of the Invention] As described above, the present invention includes a coil block in which an intermediate piece of an iron core formed in a substantially U-shape is inserted into a coil frame around which a coil is wound, and both magnetic poles each having an iron core at both ends. and an armature block having an armature opposite to the armature and having a fulcrum section substantially in the center,
Since the fulcrum part of the armature is integrally formed approximately at the center in the axial direction of the coil frame, the fulcrum part of the armature is formed in the coil block. By being supported by the shaft support, the positional relationship between the armature and the iron core can be accurately determined, and this has the advantage that characteristics such as suction force are stabilized. In addition, since the armature and coil block are positioned accurately, the stroke of the armature is stable, and when used as a relay drive device, there is no need to adjust the spring load of the contact for each product. It has the advantage of producing quality products.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is an exploded perspective view of the same as above. 1 is a coil block, 2 is an armature block, 11 is an iron core, 12 is a coil frame, 13 is a coil, 14 is a support base, 15 is a magnet insertion groove, 16 is a magnet piece, 17 is a flange, 18 is a fulcrum receiving groove, 21 is an armature, 22 is a support member, and 23 is a rotating shaft.

Claims (1)

[Claims] 1. A coil block in which an intermediate piece of an iron core formed in a substantially U-shape is inserted into a coil frame around which a coil is wound, and a coil block with both ends facing both magnetic poles of the iron core and a fulcrum part approximately in the center. An electromagnet comprising an armature block having an armature, and a shaft support that pivotally supports a fulcrum part of the armature and swingably supports the armature is integrally formed approximately in the center of the coil frame. Device.