JPS586117Y2 - relay - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a relay, and an object of the present invention is to provide a relay that improves the accuracy of the fixed contact spacing, improves quality, and facilitates assembly.

Generally, as shown in Fig. 1, in the conventional type, fitting grooves and openings are formed in the side wall of the coil frame A, and contact plates C and 8 are fitted into the fitting grooves to assemble the coil frame. .

However, such conventional devices have problems in that it is difficult to achieve accurate dimensional accuracy in the distance between the two fixed contacts, and it takes time to assemble.

The present invention was developed in view of the problem of description, and is intended to correct the shortcomings.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is an exploded perspective view of one embodiment of the relay of the present invention.

FIG. 3 is a sectional view of the contact block of the same embodiment in a fitted state;
FIG. 4 is an exploded perspective view of another embodiment of the present invention.

In the figure, 1 is a coil frame molded from electrically insulating synthetic resin such as nylon, 2 is a terminal protruding downward from the coil frame 1, and 3 is a contact formed at one end of the coil winding tube 4. This is a housing recess.

5 is an upper contact plate; 6 is a lower contact plate; 7 is a contact block formed by integrally molding these contact plates, and is formed in the shape of a square frame, and a fixed contact interval 8 is formed in the hollow part.

Further, pressure contact portions 9° 9 are exposed on the outer periphery, for example, on the upper and lower surfaces.

Reference numeral 10 denotes a pair of fitting grooves formed on the upper and lower surfaces of the contact block.

Next, the assembly of the relay of the present invention will be explained.

A contact piece 11 connected to the terminal 2 described above is exposed on the inner surface of the clay wall of the contact accommodating portion 3 of the coil frame 1 described above.

Therefore, when the contact block 7 is inserted into the contact receiving recess 3, the pressure contact portions 9, 9 are brought into pressure contact with the contact pieces 11°11.

By applying silver plating or the like to the surfaces of the press-contact parts 9, 9 and the contact pieces 11.degree. 110, the contact resistance of the press-contact parts 9.9 can be reliably connected to the terminal 2 without becoming unnecessarily large.

As shown in FIG. 3, if a fitting protrusion 12 with a triangular cross section is formed in the vertical direction toward the inner section on the inner surface of the clay wall of the contact housing recess 3, the lower surface of the contact block 7 will be used for contact housing. By abutting against the inner surface of the lower wall of the recess 3, the contact block 7 can be fixed within the coil frame 1 with high precision.

Small grooves 10a may be formed on both sides of the fitting groove 10 to further improve the fitting condition.

Note that the relay of the present invention is not intended to be limited to the structure of the embodiments described above.

As shown in FIG. 4, a part of the contact plate may be provided protruding from both sides of the contact block 70, inserted into the slit 13 of the contact plate, and then bent downward to form an external contact 14.14. It's good.

In this case as well, the coupling accuracy of the contact block 7 can be increased by forming a fitting groove 10 on the upper surface of the contact block 7 and fitting it into the fitting protrusion 12 on the inner surface of the clay wall of the contact housing recess 3. .

As mentioned above, the relay of the present invention is made up of a square frame-shaped contact block with a fixed contact plate protruding from the inner cavity, which is fitted into a contact housing recess attached to the end of a coil winding tube. can be configured with extremely high precision, and there is an advantage that it can be manufactured effectively without requiring any special work to improve precision during assembly.

It should be noted that if an external contact protruding from the outer circumferential surface of the contact block is made to protrude outward from the slit of the contact housing recess and collide with the external contact, contact resistance can be reduced and reliability can be improved.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a conventional relay, Fig. 2 is an exploded perspective view of an embodiment of the relay of the present invention, Fig. 3 is a cross-sectional view of the fitted state of the contact block of the same embodiment, and Fig. 4 is an exploded perspective view of a conventional relay. FIG. 3 is an exploded perspective view of another embodiment of the present invention; 1... Coil frame, 2... Terminal, 3...
...Contact housing recess, 4...Coil winding tube,
5... Upper contact plate, 6... Lower contact plate, 7... Contact block, 8... Fixed contact spacing, 9... Pressure contact portion, 10... Fitting groove, 10a... Small groove, 11... External contact, 12... Fitting protrusion.

Claims (1)

[Scope of utility model registration request] A relay O characterized in that a square frame-shaped contact block with a fixed contact plate protruding from the inner cavity is fitted into a contact accommodating recess provided at the end of a coil winding tube.