JPH0129706Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is based on the configuration of an electromagnetic relay that has been widely used as automation and labor saving of electronic control equipment become widespread.
In particular, the present invention relates to improvements that facilitate the assembly of compact electromagnetic relays and strengthen their dielectric strength.

FIG. 1 is a sectional view showing a conventional relay, and the configuration of its main parts will be explained below.

In Fig. 1, 1 is an electrode coil, 2 is an iron core,
3 is a yoke, 4 is an armature, 5 is a fixed contact terminal on the break side, 6 is a fixed contact terminal on the make side, 8 is a movable contact spring with a movable contact 7 fixed to its tip, 12 is various components such as the coil 1 A base 13 is a plastic dustproof cover molded to accommodate the lead portion 9 of the movable contact spring 8, the lead terminal 10 to which the coil 1 is connected, and the lead portions 11 of the fixed contact terminals 5 and 6. is base 12
protrudes further downwards.

A relay with such a configuration has a base 1 having an insulating property.
2, the electromagnet part, which is a combination of the coil 1, iron core 2, yoke 3, and armature 4, is inserted into the relay. Performance especially coil 1
Securing the insulation resistance of the gap 14 between the yoke 3 and the yoke 3 was a problem.

The purpose of this invention is to improve the workability and pressure resistance associated with miniaturization, and to simplify assembly work by standardizing the work of joining the core and yoke and the work of joining them to the mold base. At the same time, the insulating barrier ensures the voltage resistance of at least the coil and the yoke.

That is, a coil bobbin and a mold base that are integrally connected, an electromagnetic coil wound around the coil bobbin, a first plate part that is fitted into a groove of the mold base along the end surface of the coil, and An L-shaped yoke consisting of a second plate portion extending along the side surface, an L-shaped movable spring to which a movable contact is fixed, a fixed contact terminal having a fixed contact facing the movable contact, and the coil. A first plate part that partitions between the yokes and a second plate part that holds the fixed contact terminal are U-shaped insulating barriers that are vertically disposed at both ends of a top plate having a through hole in the core, and the insulator an iron core that passes through the center of the barrier and the coil bobbin and is connected to the first plate portion of the yoke; and an armature that is connected to the yoke via the movable spring and faces the other end of the iron core; The mold base is characterized in that a protrusion protruding inward from the free end of the first plate portion of the insulating barrier is configured to fit into a groove provided in the mold base.

Embodiments of the electromagnetic relay according to the present invention will be described below with reference to the accompanying drawings.

Fig. 2 is an exploded perspective view of a relay according to an embodiment of the present invention, and Fig. 3 is a side sectional view of a relay according to an embodiment of the present invention. The same symbols as in Figure 1 were used.

In FIG. 2, the mold body 32 is formed by integrally connecting the mold base 12 and the coil bobbin 15, and the winding end of the coil 1 wound around the coil bobbin 15 is connected to the lead terminal 1 implanted in the mold body 32. connected to.

The relay according to the present invention has a first plate part 37 that partitions between the coil 1 and the yoke 3 and a second plate part 38 that has a pair of through holes 19 at both ends of the top plate having the through hole 36 of the iron core 2. , each of which has a U-shaped insulating barrier 33 vertically disposed. The first plate part 37 and the second plate part 38 of the insulating barrier 33 have a protruding piece 39 that protrudes inward at the free end, and the coil bobbin 1
Layer the top plate on 5 and attach the insulating barrier 33 to the molded body 3.
A pair of grooves 40 into which the projecting pieces 39 fit when mounted on the mold base 12 are provided on the side surfaces of the mold base 12.

The mold base 12 has a pair of through holes 19a communicating with the through hole 19, and a groove 16 into which the first plate part of the L-shaped yoke 3 is fitted along the end surface of the coil 1, and has a fixed contact. The fixed contact terminal 20 formed by fixing the fixed contact 21 and the fixed contact terminal 22 formed by fixing the fixed contact 23 are held by passing through the through hole 19 and the through hole 19a, respectively.

On the other hand, a first hole 30 having a hole 30 into which one end 31 of the iron core 2 is inserted is inserted into the groove 16 of the mold base 12.
a second plate extending along the side surface of the coil 1;
The L-shaped yoke 3, which is made up of a plate part, has a plurality of dowels 27 pushed out to the back side of the figure on the second plate part, and the L-shaped movable contact spring 8 to which the movable contact 7 is welded is It has a through hole 27a.

The movable contact spring 8 can be fixed to the second plate portion of the yoke 3 by fitting the through hole 27a into the dowel 27 and then caulking the tip of the dowel 27.
Note that the armature 4 facing the other end of the iron core 2 is fixed to a movable contact spring 8 and connected to the second plate portion of the yoke 3 via the movable contact spring.

As shown in FIG. 3, the relay of the present invention is assembled as shown in FIG. The iron core 2 is inserted into the groove and passed through the top plate of the insulating barrier 33 and the center of the coil bobbin 15.

After that, the tip 31 of the iron core 2 protruding from the hole 30 of the yoke 3 is caulked from the underside of the mold base 12.Finally, a protective cover made of plastic is placed over the mold base 12, and all of the electromagnet and contact parts of the relay are closed. Cover with a protective cover.

The fixed contact terminals 20 and 22 should be inserted into the through-hole 19 in an order that does not interfere with the above-mentioned work, for example, the fixed contact terminal 22 on the make side should be inserted into the through-hole 19 in the order in which the yoke 3 is inserted into the mold base 12. This is done prior to the insertion, and the insertion of the fixed contact terminal 20 on the break side into the through hole 19 is performed at least after the yoke 3 is inserted into the mold base 12.

As explained above, the present invention improves the work of joining the iron core and yoke and the work of joining them to the mold base for relays in which the coil stands upright against the base, especially small relays that have strict design and manufacturing regulations. By making them common, assembly work is facilitated, and the insulating barrier has the effect of strengthening at least the pressure resistance between the coil and the yoke.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional relay, FIG. 2 is an exploded perspective view of a relay according to an embodiment of the present invention, and FIG. 3 is a side sectional view of a relay according to an embodiment of the present invention. In the figure, 1 is a coil, 2 is an iron core, 3 is a yoke, 4 is an armature, 8 is a movable contact spring, 12 is a mold base, 15 is a coil bobbin, 16 is a groove, 2
0 and 22 are fixed contact terminals, and 33 is an insulating barrier.

Claims (1)

[Claims for Utility Model Registration] A coil bobbin and a mold base that are integrally connected and formed, an electromagnetic coil wound around the coil bobbin, and a first plate that is fitted into a groove of the mold base along the end surface of the coil. and a second plate extending along the side surface of the coil, an L-shaped movable spring to which a movable contact is fixed, and a fixed contact that faces the movable contact. a contact terminal, a first partition between the coil and the yoke;
A second plate part holding the plate part and the fixed contact terminal includes a U-shaped insulating barrier vertically installed at both ends of the top plate having a through hole in the core, and a second plate part that passes through the center of the insulating barrier and the coil bobbin. an iron core connected to a first plate portion of the yoke; and an armature connected to the yoke via the movable spring and facing the other end of the iron core; An electromagnetic relay characterized in that a protruding piece protruding inward from a free end of the part is configured to fit into a groove provided in the mold base.