JPH019076Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an electromagnetic relay.

Conventionally, in order to facilitate assembly and production and adapt to miniaturization, an electromagnetic block was sandwiched between a pair of terminal blocks to which terminals were fixed, and the terminal block was inserted into a recess in the base. An electromagnetic relay with a cover fitted has been proposed. When assembling this type of electromagnetic relay, the connection between the coil and the coil terminal is made by first holding the electromagnetic block between the terminal blocks, then winding the coil around the coil terminal and making a temporary connection, and then fitting the terminal block into the base. Complete connection is achieved by soldering the temporarily connected coil and coil terminal. However, since the coil is exposed until the cover is fitted, it can easily break if it hits an object, and it can also easily break if a jig hits the coil terminal or the end of the cover hits the coil terminal during the assembly stage. Even if the coil terminal falls in the direction of pulling the coil, there is a risk of the coil breaking.

The present invention was created in view of these drawbacks.
It is an object of the present invention to provide an electromagnetic relay that prevents disconnection of a coil and guides and positions a cover.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which are examples of the present invention.

Figures 1 and 2 show a hinged electromagnetic relay equipped with two-pole double-throw crossbar twin contacts, where 1 is an iron core, 2 is a spool, 3 is a coil, 4 is an iron core frame, and 5
1 is a movable iron piece, and 6 is a card, which constitute an electromagnetic block 7.

9a, 9b are a pair of terminal blocks, and each terminal block 9a, 9b has contact terminals 10a, 10b,
11a, 11b, 12a, 12b and coil terminal 1
3a and 13b are insert molded. The contact terminals protrude from the upper surfaces of the terminal blocks 9a, 9b and are bent at a substantially right angle, and a contact (not shown) and movable contact pieces 14a, 14b are attached to the bent portions. In addition, the terminal blocks 9a, 9
Coil insertion grooves 15a and 1 are provided on the outer surface of b, respectively.
5b is formed, and this coil insertion groove 15
The upper ends of a and 15b are open near upper end protrusions 16a and 16b of coil terminals 13a and 13b. The electromagnetic block 7 has terminal blocks 9a,
9b, and the ends 3a and 3b of the coil 3 are wound around the protrusions 16a and 16b of the coil terminals 13a and 13b through the coil insertion grooves 15a and 15b, and are temporarily connected.

Reference numeral 17 denotes a base having a recess 18 into which the terminal blocks 9a, 9b and the electromagnetic block 7 are fitted, and terminals 10a, 10b, 11 are provided on both sides of the bottom.
Press-fit holes 21 to 24 of a, 11b, 12a, 12b, 13a, and 13b are formed. Protective walls 19a, 19b are integrally protruded from the open end of the base 17, and these protectors 19a, 19b protect the coil terminals 13a, 13b when the terminal blocks 9a, 9b are fitted into the base 17. It is located near the sides of the protrusions 16a and 16b. After fitting the electromagnet block 7 into the recess 18 of the base 17, the protrusions 16 of the coil terminals 13a, 13b
Both ends 3a of the coil 3 wound around a and 16b,
3b is soldered and fully connected. In addition,
Triangular notch groove 25 provided at the bottom of the base 17
is a passageway for guiding the coil 3 of the electromagnetic block 7 fitted into the base 17 to the coil insertion grooves 15a, 15b. Reference numeral 26 denotes a hinge spring having spring properties, which is press-fitted between the terminal blocks 9a, 9b and the base 17 after the terminal blocks 9a, 9b are fitted into the base 17, and its bent piece 26a
is pressed by a movable iron piece.

A cover 27 is fitted onto the base 17 into which the terminal blocks 9a, 9b and the electromagnetic block 7 are fitted. 20 and 28 are engaging portions formed on the base 17 and the cover 27, respectively. When the cover 27 is fitted, the protective walls 19a, 1
The upper end of 9b contacts the ceiling surface 29 of the cover 27,
The cover 27 is positioned and held.

Here, a method of assembling the electromagnetic relay having the above configuration will be explained. First, connect the electromagnet block to terminal block 9.
a and 9b from both sides, and both ends 3 of the coil 3.
a, 3b through the coil insertion grooves 15a, 15b of the terminal blocks 9a, 9b to connect the coil terminals 13a, 1.
3b to the upper end protrusions 16a and 16b, and is temporarily connected by winding it around the protrusions. Next, terminal block 9 holding the electromagnetic block
When a and 9b are press-fitted into the recess 18 of the base 17,
Each terminal 10a, 10b, 11a, 11b, 12
a, 12b, 13a, 13b are press-fit holes 21 to 24
penetrates and protrudes downward. In this state, the protrusions 16a, 16b of the coil terminals 13a, 13b and the protective walls 19a, 19b are close to each other. Next, the hinge spring 26 is press-fitted into the base 17, and the protruding parts 16a, 16 of the coil terminals 13a, 13b, which were temporarily connected earlier, are
b and both ends 3a and 3b of the coil 3 are completely connected with solder or the like. Thereafter, the cover 27 is fitted onto the base 17 to complete the assembly.

When the terminal blocks 9a, 9b and the electromagnet block 7 are fitted into the base 17, the ends 3a, 3b of the coil 3 are exposed, so they are easily broken, and the coil terminals 13a, 13
Since the upper end protrusions 16a and 16b of the base 17 protrude from the open end of the base 17, this protrusion 16
If the jig hits a, 16b or the cover 2
7. When the cover 27 is fitted, the lower end of the cover 27 may come into contact with the protrusions 116a and 16b, causing the protrusions 116a and 16b to fall in the direction of pulling the coil 3 (in the direction of the arrow in FIG. 1), which may cause the coil 3 to break. However, in the present invention, the protrusions 16 of the coil terminals 13a, 113b
Since the protective walls 19a, 19b are provided near the sides of the coils 19a, 16b, the coils themselves are protected and the protective walls 19a, 19b are protected against external forces in the direction of the arrow.
19b is the protrusion 16 of the coil terminals 13a, 13b.
a, 16b and prevent the protrusions 16a, 16b from falling. Therefore, the risk of disconnection of the coil 3 is completely eliminated. In addition, the protective wall 19
Since a and 19b also function as guides when fitting the cover 27 onto the base 17, the cover can be reliably fitted in an accurate position.

As is clear from the above explanation, according to the present invention, a protective wall is provided integrally with the base to protect the exposed coil and coil terminal when the electromagnetic block and terminal block are fitted into the base. Disconnection of the coil can be completely prevented, and since the protective wall only protects the outer surface, it does not interfere with the connection work between the coil and the coil terminal. Furthermore, the protective wall also serves as a guide when fitting the cover, making it easier to fit the cover.Also, since the protective wall is placed opposite the ceiling surface of the cover, external force acts on the cover, causing the cover to deform. There is no need to worry about external force being applied to the coil terminals.

[Brief explanation of drawings]

FIG. 1 is a partially omitted perspective view of an electromagnetic relay according to the present invention, and FIG. 2 is an exploded perspective view thereof. 7...Electromagnetic block, 9a, 9b...Terminal block, 13a, 13b...Coil terminal, 16
a, 16b... protrusion, 17... base, 18...
...Recess, 19a, 19b...Protective wall, 27...Cover, 29...Ceiling surface.

Claims (1)

[Scope of utility model registration request] In an electromagnetic relay, an electromagnetic block is sandwiched between a pair of terminal blocks to which terminals are fixed, the terminal block is fitted into a recess in a base, and a cover is fitted to the base.A coil terminal is placed on the top surface of the terminal block. An electromagnetic relay characterized in that one end of the coil terminal protrudes, and a protective wall is provided protruding from the open end of the base near the outer side of the protruding part of the coil terminal and facing the ceiling surface of the cover.