JPH06196063A - Manufacture of polar relay - Google Patents

Abstract

PURPOSE:To perform line production while avoiding a bad influence on a relay contact. CONSTITUTION:This manufacturing method is for a polar relay having an iron core 1; a coil 3 wound on the iron core 1; a permanent magnet 4 interposed between the magnetic pole pieces of the iron core 1; an armature 5 rockably placed on the permanent magnet through a supporting point; and a contact spring 6 to which a movable contact 8 integrally mounted on the armature 5 to connect and disconnect with a fixed contact 9 is fixed. The permanent magnet 4 is positioned and fixed between the magnetic pole pieces of the iron core 4 to form a block body 16. Thereafter, a fixed terminal 13 provided with a coil terminal 11, a common terminal 12, and the fixed contact 9 is arranged on the circumferential part of the block body 15, and secondary insert molding of a resin body 14 is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a polarized relay, and more particularly to a technique for performing line production while avoiding adverse effects on relay contacts.

[0002]

2. Description of the Related Art Conventionally, an iron core, a coil wound around the iron core, a permanent magnet interposed between magnetic pole pieces of the iron core,
A polarized relay having an armature mounted on the permanent magnet via a fulcrum so as to be swingable, and a contact spring fixed to a movable contact that is integrally attached to the armature and that contacts and separates from a fixed contact. In the method of manufacturing, a primary molding of a synthetic resin layer covering the coil winding is performed, and a coil terminal, a common terminal, and a fixed terminal provided with a fixed contact are arranged around such a coil block to form a resin. Performs secondary insert molding of the body, then arranges permanent magnets between the iron core pole pieces,
There are a method of laser welding a permanent magnet to a pole piece to position and fix the permanent magnet, and a method of attaching the permanent magnet with an adhesive.

[0003]

However, in the former method as described above, when laser welding is performed, there is an adverse effect such as adhesion of welding dust to the contacts arranged in the peripheral portion, and the characteristics of the relay are increased. There is a problem of lowering it. In the latter method, the positioning accuracy of the permanent magnet is low,
Also, we have to consider the drying and curing time of the adhesive,
There is a problem in that it is difficult to put the bonding process into a line.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for manufacturing a relay that can perform line production while avoiding adverse effects on the relay contacts. There is.

[0005]

According to the present invention, an iron core 1, a coil 3 wound around the iron core 1, a permanent magnet 4 interposed between magnetic pole pieces of the iron core 1, and a permanent magnet 4 are provided. An armature 5 mounted on the armature so as to be swingable via a fulcrum, and a contact spring 6 to which a movable contact 8 that is integrally attached to the armature 5 and that contacts and separates from a fixed contact 9 is fixed. A method of manufacturing a pole relay, in which a permanent magnet 4 is positioned and fixed between pole pieces of an iron core 1 to form a block body 15, and then the block body 1
Coil terminal 11, common terminal 12, fixed contact 9 on the periphery of
The secondary insert molding of the resin body 14 is performed by arranging the fixed terminal 13 provided with.

[0006]

Even if laser welding is used to fix the permanent magnet 4 between the magnetic pole pieces of the iron core 1, there is no relay contact in the peripheral portion thereof, and the relay contact is not adversely affected.
Even in the case of using an adhesive, by producing the block body 15 in advance, it becomes possible to form a secondary insert molding line.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment of the present invention. In the polarized relay of this embodiment, as shown in FIG. 1, an iron core 1 is formed in a substantially U shape, and the iron core 1 is arranged with both side pieces facing upward. A coil bobbin 2 made of synthetic resin is integrally formed with the iron core 1. That is, the iron core 1 is insert-molded on the coil bobbin 2. Here, the tip portions of both side pieces that are magnetic poles of the iron core 1 are exposed from the coil bobbin 2. A coil 3 is wound around the body of the coil bobbin 2. A rectangular parallelepiped permanent magnet 4 is attached between both side pieces of the iron core 1 exposed from the coil bobbin 2. The permanent magnet 4 is magnetized with different polarities at the center and both ends.

The manufacturing process of each member will be described. First, the coil bobbin 2 is manufactured by inserting the iron core 1,
The coil 3 is wound around the iron core 1, and then the permanent magnet 4 is attached. In the following description, the member including the iron core 1, the coil bobbin 2, the coil 3 and the permanent magnet 4 is referred to as an electromagnet block. The electromagnet block is molded with a synthetic resin together with the terminal 7 to be integrally molded as a body block 16 shown in FIGS. The terminal 7 has a fixed terminal 13 having a fixed contact 9 formed at the base end, and a fixed piece 7a having a hinge spring piece 6a of a contact spring 6 described later fixed to the base end.
And a coil terminal 11 for energizing the coil 3, and two terminals are provided on both sides of the electromagnet block.
One fixed terminal 13, one common terminal 12 and two coil terminals 11 are implanted. The upper surface of the base of the common terminal 12 is molded so as to be exposed from the upper surface of the body block 16. Then, after the formation, the portions exposed from the molding portions of the respective terminals 7 are bent downward.

An armature 5 is arranged on the permanent magnet 4 of the body block 16. The armature 5 is formed in a flat plate shape, has a protrusion (not shown) serving as a swing fulcrum at the center of the lower surface, and is swingably mounted on the permanent magnet 4. A contact spring 6 is integrally attached to the armature 5. In the case of this embodiment, since it is a two-circuit type polarized relay, two contact springs 6 are provided on both sides of the armature 5. Movable contacts 8 are fixed to both ends of the contact spring 6, and a hinge spring piece 6a is projectingly provided from one side portion of the central portion. The hinge spring piece 6a is fixed to the fixing piece 7a of the common terminal 12, whereby the contact spring 6 is electrically connected to the common terminal 12. The hinge spring piece 6a also has a function of imparting a restoring force to the armature 5 due to the twist generated when the armature 5 is attracted to one of the side pieces of the iron core 1. Also,
In this embodiment, the armature 5 and the contact spring 6 are molded with a synthetic resin to be integrally molded as the armature block 12.

By the way, when assembling the permanent magnet 4, the following steps are taken. That is, the permanent magnet 4 is positioned and fixed between the magnetic pole pieces of the iron core 1 to form the block body 15, and then the coil terminal 11, the common terminal 12, and the fixed contact 9 are provided on the peripheral portion of the block body 15 as described above. The fixed terminal 13 is provided and the resin body 14 is subjected to secondary insert molding to produce the body block 16.

Therefore, even if laser welding is performed to fix the permanent magnet 4 between the magnetic pole pieces of the iron core 1, there is no relay contact in the peripheral portion, and the relay contact is not adversely affected. Even in the case of using an adhesive, by producing the block body 15 in advance, it becomes possible to form a secondary insert molding line. As described above, the cover 17 shown in FIG. 2 is fitted with the armature 5 mounted and mounted on the permanent magnet 4 of the body block 16. The cover 17 has a box-like shape with an open lower surface, and a sealing portion 17a for sealing the inside is formed at one corner of the upper surface.

FIG. 4 shows another embodiment in which a plurality of projections 2a are formed on the coil bobbin 2 and the projections 2a are formed.
The permanent magnet 4 is arranged on the upper part of the upper part, and the upper part of the protrusion 2a is crushed so that the permanent magnet 4 can be positioned. That is, by pressing the permanent magnet 4 with a jig and appropriately crushing the upper part of the protrusion 2a formed slightly higher,
As shown in FIG. 3, the dimension L between the magnetic pole piece 1 a of the iron core 1 and the permanent magnet 4 is set to a predetermined dimension to enhance the positional accuracy of the permanent magnet 4 and to prevent the contact with the armature 5 on the permanent magnet 4. The accuracy of the relative distance is increased, and as a result, the relay characteristics are improved.

FIG. 5 shows still another embodiment. As shown in FIG. 5B, a groove 18 is formed in the coil bobbin 2 and the claw 20 of the winding jig 19 is bitten into the groove 18. The holding force of the coil bobbin 2 by the winding jig 19 is increased to prevent the coil bobbin 2 from coming off due to the centrifugal force, and the coil bobbin 2 can be sufficiently positioned.

[0014]

As described above, according to the present invention, the permanent magnet is positioned and fixed between the magnetic pole pieces of the iron core to form the block body, and then the block body is provided with the coil terminal, the common terminal, and the fixed contact on the periphery thereof. Since the terminals are provided and the secondary insert molding of the resin body is performed, even if laser welding is performed to fix the permanent magnet between the magnetic pole pieces of the iron core, there is no relay contact in the periphery, There is an advantage that the secondary insert molding can be made into a line by producing the block body without adversely affecting the contact point and by using the adhesive.

[Brief description of drawings]

FIG. 1 is a perspective view showing an assembly procedure of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the above.

FIG. 3 is a perspective view showing an assembly procedure in another embodiment of the above.

FIG. 4 is a partial sectional view of the above.

5A is a perspective view showing an assembling procedure of another embodiment of the above block body, and FIG. 5B is a partial sectional view.

[Explanation of symbols]

 1 Iron core 2 Coil bobbin 3 Coil 4 Permanent magnet 5 Armature 6 Contact spring 8 Moving contact 9 Fixed contact 10 Synthetic resin layer 11 Coil terminal 12 Common terminal 13 Fixed terminal 14 Resin body 15 Block body

Claims (1)

[Claims] 1. An iron core, a coil wound around the iron core, a permanent magnet interposed between magnetic pole pieces of the iron core, and swingably mounted on the permanent magnet via a fulcrum. A method for manufacturing a polarized relay, comprising: an armature; and a contact spring, which is integrally attached to the armature and has a movable contact fixed to and separated from a fixed contact, wherein a permanent magnet is positioned between magnetic pole pieces of an iron core. A polarized relay characterized in that it is fixed to form a block body, and then a coil terminal, a common terminal, and a fixed terminal provided with a fixed contact are arranged around the periphery of the block body to perform secondary insert molding of a resin body. Manufacturing method.