JPS645810Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a solenoid used in electromagnetic relays and the like.

A conventional solenoid was constructed as shown in FIG.

That is, an iron core 2 is mounted in the center on an L-shaped yoke 1, and a coil bobbin 4 with a coil 3 wound around its outer periphery is placed on it. The lower end of the iron core 2 is fastened to the yoke 1 and connected thereto. An armature 5 is supported on the upper end of the yoke 1, and a coil spring 8 is stretched between a rear central protrusion 6 of the armature 5 and a bottom protrusion 7 of the yoke 1.

In this state, when a current is applied to the coil 3 which is wound around the coil bobbin 4 a predetermined number of times, a magnetic force is generated in the iron core 2 and the armature 5 is attracted against the coil spring 8.

This configuration has disadvantages in that it is necessary to use a thick material for the yoke 1, which requires time and effort to process, and the overall size is large.

The present invention eliminates the above-mentioned conventional drawbacks, and aims to provide a solenoid whose yoke can be made of a thin material and whose size can be reduced.

In order to achieve the above object, the present invention incorporates a coil bobbin with an iron core in the center and a coil wound around the outer periphery of a yoke having a bottom plate and side plates, and a notch is provided at the upper rear end of both side plates of this yoke. The armature is fitted and supported in the notch, and a downward tongue piece provided at the center of the rear side of the armature is engaged with a wire spring whose both ends are supported in the notch.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 4.

9 is a bottom plate 9a and both side plates 9 made of magnetic metal plates.
The yoke is formed in a U-shape with 9c and 9c, and an iron core 1 is placed on the bottom plate 9a of the yoke 9.
A coil bobbin 12 in which a coil 11 is wound around the outer periphery of a coil bobbin 12 having a coil 11 fitted in the center thereof is connected by fitting the lower end of the iron core 10.

An L-shaped notch 13 is provided at the upper rear end of both side plates 9b and 9c of the yoke 9.
Both ends of the wire spring 14 are fitted into the side plate 9.
It is incorporated between b and 9c.

Furthermore, support protrusions 16 on both rear sides of the armature 15 made of a magnetic metal plate are fitted into the notches 13. Furthermore, a tongue piece 17 that projects downward is provided at the center of the rear part of the armature 15, and this tongue piece 17 is engaged with the wire spring 14.

With such a configuration, the tongue piece 17 of the armature 15 is normally pulled by the elastic force of the wire spring 14, so that the armature 15 is kept separated from the iron core 10.

When a current is applied to the coil 11 in this state,
A magnetic force is generated in the iron core 10, and the armature 15 is attracted to the iron core 10 against the elastic force of the wire spring 14.

The solenoid of the present invention is constructed as described above, and since the yoke is U-shaped, two magnetic circuits are formed on the left and right, which greatly improves magnetic efficiency and requires lower voltage. The yoke and armature can be made of thin material, making them easy to process. Also, the wire spring is simply inserted into a notch in the yoke, making it compact, compact, and low cost. It has great practical value, as it has the effect of being able to measure

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional solenoid, Figure 2 is a side view of a conventional solenoid.
The figure is a front view showing one embodiment of the solenoid of the present invention, FIG. 3 is a side view of the same, and FIG. 4 is a partially cutaway perspective view of the same. 9... Yoke, 9a... Bottom plate, 9b, 9c...
Side plate, 10... Iron core, 11... Coil, 12...
Coil bobbin, 13...notch, 14...wire spring, 15...armature, 16...support protrusion,
17... Tongue piece.

Claims (1)

[Scope of utility model registration request] A coil bobbin with an iron core in the center and a coil wound around the outer periphery is installed in a yoke consisting of a bottom plate and side plates, and a notch is provided at the upper rear end of both side plates of this yoke, and a part of the armature is fitted into this notch. A solenoid is pivotally supported, and a downward tongue piece at the center of the rear end of the armature is engaged with a wire spring whose both ends are engaged with the notches in the side plates.