JP3521433B2 - Polarized relay - Google Patents

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 polarized relay capable of performing line production while avoiding adversely affecting the relay contacts. It is in.

[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. and armature 5 which is swingably mounted via a fulcrum on, and a contact spring 6 the movable contact 8 is secured to separable to the fixed contact 9 is integrally attached to the said armature 5 Yes It is a pole relay , in which the iron core 1 is insert-molded on the coil bobbin 2 and
The permanent magnet 4 is disposed on the protrusion 2a formed on the rubobin 2 and between the magnetic pole pieces 1a of the iron core 1 , and the permanent magnet 4 is pressed down.
Crush the upper part of the protrusion 2a to fix the permanent magnet 4 in position.
Then, the block body 15 is formed, and then the coil terminal 11, the common terminal 12, and the fixed terminal 13 provided with the fixed contact 9 are arranged on the periphery of the block body 15 to perform the secondary insert molding of the resin body 14. it is characterized in that it has prepared me Okona. In addition, the winding jig 19 is attached to the coil bobbin 2.
It is also preferable that the concave groove 18 that bites the nail 20 is formed.
Yes.

[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, the production of the block body 15 enables the secondary insert molding line . In addition, the upper portion of the protrusion 2a formed on the coil bobbin 2
Since the permanent magnet 4 is positioned by crushing the
The dimension L between the magnetic pole piece 1a of No. 1 and the permanent magnet 4 is a predetermined dimension.
Thus, the positional accuracy of the permanent magnet 4 can be improved.
In addition, the claw 20 of the winding jig 19 is bited into the coil bobbin 2.
When the hollow groove 18 is formed, the coil by the winding jig 19
The holding power of the rubobin 2 can be increased.

[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.

In this example, a plurality of protrusions 2a are formed on the coil bobbin 2 and the permanent magnet 4 is formed on these protrusions 2a.
Arranged and Ru the projection 2a crush top to be able to perform the positioning of the permanent magnet 4 Tei. In other words, the upper portion of the protrusion 2a formed slightly higher is fixed with a jig to the permanent magnet 4
3, the dimension L between the magnetic pole piece 1a of the iron core 1 and the permanent magnet 4 is set to a predetermined dimension by pressing and crushing the permanent magnet 4 to improve the positional accuracy of the permanent magnet 4 and increasing the relative distance accuracy between the armature 5 on the 4, as a result, it is the Ru Tei enhanced relay characteristics.

FIG. 5 shows another embodiment. As shown in FIG. 5B, a groove 18 is formed in the coil bobbin 2 and the groove 1 is formed.
8 and the claw 20 of the winding jig 19 is bitten into the winding jig 1
The holding force of the coil bobbin 2 by 9 is increased, the coil bobbin 2 is prevented from coming off due to the centrifugal force, and the coil bobbin 2 can be sufficiently positioned.

[0014]

As described above, according to the invention of claim 1 , a permanent magnet is positioned and fixed between the magnetic pole pieces of the iron core to form a block body, and then a coil terminal, a common terminal, and a fixed contact are provided around the periphery of the block body. Since the secondary insert molding of the resin body is performed by disposing the fixed terminal provided with, even if laser welding is performed to fix the permanent magnet between the magnetic pole pieces of the iron core,
Since there is no relay contact on the periphery, it does not adversely affect the relay contact, and even if it is made of adhesive, it is possible to make a line of secondary insert molding by producing a block body. There is an advantage. Also coil
Position the permanent magnet by crushing the upper part of the protrusion formed on the bobbin.
Since it is performing
Increase the accuracy of the relative distance to the armature above the magnet and
Has the advantage that the relay characteristics can be improved.
It The invention of claim 2 adds to the effect of the invention of claim 1.
, To increase the holding power of the coil bobbin by the winding jig.
This prevents the coil bobbin from coming off due to centrifugal force.
And the coil bobbin can be positioned sufficiently
There is an advantage.

[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 bobbins 3 coils 4 permanent magnet 5 Armature 6 contact springs 8 movable contacts 9 fixed contacts 10 Synthetic resin layer 11 coil terminals 12 common terminals 13 fixed terminal 14 resin body 15 blocks

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-4-192236 (JP, A) JP-A-4-149924 (JP, A) JP-A-63-236235 (JP, A) JP-A-3- 241629 (JP, A) JP-A-5-234485 (JP, A) Actual development Sho 63-168944 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01H 49/00-51 / 36

Claims (2)

(57) [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. Yukyokuri laser having a armature, the contact spring toward and away from the movable contact to the fixed contact is attached is secured integrally with the armature
And insert the core into the coil bobbin,
Place a permanent magnet on the protrusion formed on the ilbobin and between the magnetic pole pieces of the iron core , and press the permanent magnet to crush the upper part of the protrusion.
Then, fix the permanent magnet in position and fix the block body .
Formed, then, is characterized in that produced coil terminals on the peripheral portion of the block body, the common terminal, is disposed a fixed terminal having a fixed contact I Do to put the secondary insert molding of the resin body with polar relay. 2. The claw of the winding jig is bited into the coil bobbin.
The groove according to claim 1, wherein a concave groove is formed.
Pole relay.