JPS5832183Y2 - Holding device for electromagnetic coil in electromagnetic contactor - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for elastically holding an electromagnetic coil of an electromagnetic contactor (including one used in combination with a thermal relay as a so-called electromagnetic switch) to a case housing the electromagnetic coil.

The electromagnetic coil of the electromagnet for the electromagnetic contactor needs to be held elastically in the case and pressed, but when the coil is inspected or replaced due to a malfunction, the holding means may fall off or move. It is desirable that it be as small as possible.

Conventionally, as shown in FIG. 1, a coil 2 is inserted into a fixed core 1, and a support body 5, which is connected to a movable core 4 and supports a movable contact (not shown) facing upward, and a frame for the coil 2 are used. 3
A method was adopted in which a coil spring 6 was inserted between the protrusion 3a provided on the holder and the protrusion 3a.

The coil spring 6 presses the coil 2 against the fixed core 1 and also functions as a return spring for the movable core 3.

Although the coil spring 6 has a simple structure, there are buttons that may fall off or move during disassembly and assembly.

As a countermeasure to this problem, a protrusion 5a as shown in FIG. 2 was also provided on the support 5 of the movable contact and a coil spring 6 was press-fitted into the protrusion 5a, but the expected effect was not obtained.

The object of this invention is to eliminate the above-mentioned drawbacks and provide a holding device for an electromagnetic coil in an electromagnetic contactor that will not fall off or move.

To achieve this purpose, the holding device for the electromagnetic □ coil that is buttoned in the electromagnetic contactor according to this invention consists of a protrusion with a neck provided on the side wall of the electromagnetic contactor case, a window in the longitudinal direction, and a cutoff at the lower end. The present invention is characterized in that the plate is attached to the protrusion through the cut portion, and the plate springs to hold the plate spring housed in the kebus.

Next, an embodiment of this invention will be described in detail based on the drawings.

In the present invention, a protrusion 7b having a thin neck γa as shown in FIG.
Set up and peel.

Further, the leaf spring 8 has a window 83s cut portion 8. bh and an inclined portion 8°1°8C2 connected thereto are provided, and are bent into an L-shape.

When the inclined portions 8c1 and 8c2 are pressed against the neck portion 7a of the protrusion Tb and the plate spring 8 is pressed, the cutting portion 8b opens and moves downward along the neck portion 7a.

When the cutting portion 8b passes over the lower end of the neck portion 7a, the cut portion 8b closes again due to the spring force, so that the leaf spring 8 is engaged with the neck portion 7a and can be easily attached to the case 7 as shown in FIG.

Further, the leaf spring 8 will not fall off or move from the cutting portion 8b even if some force is applied thereto.

The electromagnetic coil 2 wound around the coil frame 3 is elastically attached to the case T in the following manner.

That is, as shown in FIG. 4, the coil 2 is inserted from the bottom opening of the case 7 together with the fixed core 11 integrated therein, and the elastic sleeve 12 is attached to the bolt 10 passing through the case I.
held through.

At this time, the coil 2 comes into contact with the leaf spring 8 that has been attached to the protrusion 7b of the case 7 in advance, and pushes up the leaf spring 8.

In other words, the coil 2 is elastically pressed down by the plate spring 8.

In other words, the coil 2 can be elastically held down by the coil holding device without much effort required for installation.

Although the return spring of the movable core is not shown in the electromagnetic contactor equipped with the coil holding device according to this invention, it can be attached to a protrusion provided on the movable core and the case, or to a support plate attached to the movable core and the bottom plate in the past. can.

As mentioned above, the coil holding device of the electromagnetic contactor according to this invention consists of an L-shaped leaf spring and a protrusion on the case side.
Not only the protrusion, but also the plate attached to it is less likely to fall off or move.

Furthermore, in the present invention, the electromagnetic coil can be easily assembled into the case by simply inserting it through the bottom opening of the case and attaching it to the case, and the electromagnetic coil is pressed down and completely held by the leaf spring.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of an electromagnetic contactor equipped with a conventional electromagnetic coil holding means, Fig. 2 is a side view showing the electromagnetic coil, which is a conventional electromagnetic coil holding means, together with its supporting protrusion, and Fig. 3 is a developed invention. FIG. 4 is an exploded perspective view of an electromagnetic coil holding device according to this invention, and FIG. 2... Electromagnetic coil, 7... Case, 7a... Neck, 7b... Case protrusion, 8... Single-shaped leaf spring, 8
a... Window of leaf spring, 8b... Cutting part.

Claims (1)

[Scope of utility model registration request] A leaf spring consisting of a protrusion with a neck provided on the side wall of the electromagnetic contactor case, and a single-shaped leaf spring having a window in the longitudinal direction and having its lower end cut off, and attached to the protrusion through the cut part. A holding device for an electromagnetic coil in an electromagnetic contactor, characterized in that it holds an electromagnetic coil housed in the case.