JPS6333465Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for easily and reliably fixing a movable contact spring in an electromagnetic relay.

The fixation of the movable contact spring 4 in a conventional electromagnetic relay is as shown in FIGS. 1 and 2, by providing a screw hole 2a and a protrusion 2b in a yoke 2 mounted perpendicularly to the plane of the base block 1. When fixing the movable contact spring 4 with the armature 3 fixed to the yoke 2, the hole 4b provided in the fixed part 4a of the spring 4 and the screw through hole 4c are inserted into the protrusion 2b provided in the yoke 2. After fitting, they are fixed with mounting screws 5. For this reason, it is necessary to process the screw holes 2a in the yoke 2 and to prepare the screws 5, and it also requires a lot of man-hours for tightening the screws, resulting in an increase in costs. Furthermore, when screwing the screw 5 into the screw hole 2a of the yoke 2, iron powder, etc. will come out, so if the iron powder adheres to the iron core 6 or armature 3, it may cause malfunction, or it may enter the gap between the insulating plates and reduce the pressure resistance. There were inconveniences such as causing defects and getting between the contacts and causing problems such as poor contact.

The object of the present invention is to eliminate the above-mentioned drawbacks and to obtain an inexpensive and high-quality electromagnetic relay.

Hereinafter, the present invention will be explained in detail based on the drawings. FIG. 3 is an exploded perspective view of the electromagnetic relay according to the present invention, and FIG. 4 is a sectional view showing the main parts thereof.

In the figure, 1 is a base block made of plastic, and a protruding wall 1 integrally molded in a direction perpendicular to this plane.
a and 1b are provided. 2 is a yoke, and one side 2c of the yoke is provided with a protrusion 2b. 3 is an armature, 4 is a movable contact spring, and this fixed portion 4a is provided with a positioning hole 4b that fits into the protrusion 2b, a cutout 4d, and a raised cutout 4c. 6 is an iron core, and 7 is a coil wound around a coil bobbin 8. 9 is a fixed contact spring.

To assemble the electromagnetic relay according to the present invention, as shown in FIG. 3, a coil bobbin 8 having a coil wound thereon and a yoke 2 are fixed by an iron core 6 to a protruding wall 1b provided on a base block 1. Next, a gap A formed between the protruding wall 1a of the base block 1 and the surface 2c of the yoke 2
(See Fig. 4) When the fixed part 4d of the movable contact spring 4 is inserted, the protruding part 2b provided on the surface 2c of the yoke 2
A hole 4b provided in the fixed part 4a of the movable contact spring 4,
The notch 4d fits into the fixed part 4 of the movable contact spring 4.
The height of the raised cut 4c provided at a is larger than the dimension of the gap A, so the spring action (returning force) of the cut raised 4c causes the movable contact spring 4 to is pressed and fixed to the surface 2c of the yoke 2 at its fixing portion 4d. Note that the holes 4b and notches 4d provided in the fixed portion 4a of the movable contact spring 4 are not limited to this combination, and it goes without saying that a configuration of holes and holes or notches and notches is also suitable.

As described above, the present invention can easily and reliably fix the movable contact spring without using screws, reducing the number of parts and reducing costs.It is also a high-quality, low-cost product with no worries about problems caused by iron powder, etc. This has the effect of making it possible to obtain an electromagnetic relay.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a movable contact spring fixing structure of a conventional electromagnetic relay, and FIG. 2 is an exploded perspective view of FIG. 1. FIG. 3 is an exploded perspective view of the electromagnetic relay according to the present invention, and FIG. 4 is a sectional view showing its main parts. 1... Base block, 2... Yoke, 3... Armature, 4... Movable contact spring, 5... Screw, 6...
Iron core.

Claims (1)

[Scope of utility model registration request] In the structure where the movable contact spring is fixed to the yoke,
A positioning hole or a notch and a notch are provided in the fixed part of the movable contact spring, and the movable contact spring is inserted between the protruding part that protrudes perpendicularly from the plane of the base block and the yoke. An electromagnetic device characterized in that a hole provided in the movable contact spring is fitted into a positioning protrusion provided on the yoke, and a cutout provided in the movable contact spring is pressed against the protrusion of the base block. Fixed structure of movable contact spring in relay.