JPS6023929Y2 - dc electromagnet - Google Patents

Description

[Detailed description of the invention] The present invention is a DC electromagnet in which an armature 3 is fixed to an L-shaped yoke 2 to which an iron core 1 is fixed, and the armature 3 is attracted to the iron core 1. This relates to a DC electromagnet in which a magnetic gap 6 is formed between an armature 3 and an iron core 1 by abutting on a part of a terminal block 4 or a cover 5.

An object of the present invention is to provide a DC electromagnet that has a small number of parts, has extremely stable open circuit voltage characteristics even during long-term continuous use, and does not reduce operating efficiency.

In conventional DC electromagnets, a non-magnetic material such as a regular plate is fixed by welding or the like to the iron core contact portion of the armature in order to stabilize the open circuit voltage characteristics during long-term use.

Therefore, it has disadvantages in that it requires a large number of parts, requires many man-hours for assembly, and is expensive.

The present invention has been devised in view of this point, and will be described in detail below with reference to Examples.

In FIG. 1, an iron core 1 is fixed to an L-shaped yoke 2 and a coil 7 is wound thereon.

3 is an armature, which is fixed to the L-shaped yoke 2,
By energizing the coil 7, the armature 3 is attracted to the iron core 1.

4 is a terminal block provided with a protrusion 8, and when the armature 3 is attracted to the iron core 1, the tip of the armature 3 comes into contact with the protrusion 8, and a magnetic gap is created between the iron core 1 and the armature 3. Make sure to form 6.

9 is a contact block, which is fixed to the armature 3 and connects the movable contact 11 fixed to the contact spring 10 to the fixed contact 12.1.
2'.

13 is a return spring.

Now, when the coil 7 is energized and the armature 3 is attracted to the iron core 1, the tip of the armature 3 comes into contact with the protrusion 8 of the terminal block 4, and the iron core 1 and the armature 3
Since a magnetic gap 6 is formed between the two, stable open circuit voltage characteristics can be obtained even during long-term continuous use.

Next, in FIG. 2, a convex portion 15 is provided on the cover 5 fitted to the base 14, and when the armature 3 is attracted to the iron core 1, the tip of the armature 3 is in contact with the convex portion 15 and the iron core 1 is attached. A magnetic gap 6 is formed between the core 1 and the armature 3, and the same effect as that shown in FIG. 1 can be obtained.

As described above, in this invention, the tip of the armature is brought into contact with a part of the terminal block or cover, and a magnetic gap is formed between the armature and the iron core, so a range plate or the like is used. Since this is not necessary, the number of parts can be reduced, and furthermore, extremely stable open circuit voltage characteristics can be obtained even during long-term continuous use.

In addition, since a casual gap is formed in a part of the cover or terminal block that is attached or assembled in the final process, there is no need to form a casual gap on the electromagnet block side, which consists of the coil, iron core, armature, and yoke. There is no need to provide any projections, so it does not interfere with the coil winding work and terminal finishing (processing), and has the effect of not reducing work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of the DC electromagnet of the present invention, and FIG. 2 is a partially cutaway front view of another embodiment of the present invention. 1... Iron core, 2... L-shaped yoke, 3
... Armature, 4 ... Terminal block, 5 ... Cover, 6 ... Magnetic gap.

Claims (1)

[Scope of utility model registration request] The armature is secured to the L-shaped yoke to which the iron core is fixed.
In the DC electromagnet in which the armature is attracted to the iron core, the tip of the armature is brought into contact with a part of the terminal block or cover, and a magnetic gap is formed between the armature and the iron core. DC electromagnet.