JPH026178B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method of assembling an electromagnetic relay.

[Prior Art] FIG. 12 is a block diagram of an electromagnetic relay, in which a coil bobbin 1 has a guide hole 2 and a through hole 3 formed therein, and a coil 4 is wound thereon. The yoke 5 and the magnetic pole pieces 6 are for forming a magnetic circuit, and the yoke 5
One piece 7 is inserted into the guide hole 2, and one piece 8 of the magnetic pole piece 6 is inserted into the through hole 3. by the way,
When the yoke 5 is inserted, the armature 10 to which the hinge spring 9 is fixed is inserted into the through hole 3 with the hinge spring 9 fixed to the yoke 5. When the yoke 5 and the magnetic pole piece 6 are inserted into the holes 2 and 3 as described above and integrated with the coil bobbin 1, the other piece 11 of the yoke 5 is placed on the magnetic pole piece 6 and the other piece 12. On the other hand, the base spring block 13 has a break contact (not shown) and a movable contact 16, 1 at each base part 14, 15, respectively.
7 is integrally formed by molding, and external lead-out terminals 18 are provided which are electrically connected to these break contacts and movable contacts 16 and 17.
Note that each movable contact 16, 17 is fixed by welding. Further, a make contact 19 is arranged on each movable contact 16, 17. In this way, the coil bobbin 1 and the base spring block 13 are connected by fitting the protrusion 20 of the coil bobbin 1 into the hole 21 of the base spring block 13, and fitting the protrusion 20 of the coil bobbin 1 into the hole 21 of the base spring block 13.
a is inserted into the support hole 23 of the drive card 22 and fixed, and each end 24 of the drive card 22 is brought into contact with each movable contact 16, 17. Thus,
By energizing and deenergizing the coil 4, the armature 1
0 moves, and in response to this movement, the drive card 22 switches and connects the movable contacts 16 and 17 to the make contact 19 and the break contact.

[Problem that the invention seeks to solve]

By the way, when assembling an electromagnetic relay, in order to improve the operating characteristics, the drive card 2 should be adjusted especially during the stroke of the drive card and when the coil 4 is de-energized.
2 and each movable contact 16, 17 is set to a predetermined value, and the drive card 22
When 6, 17 is pushed or pulled up, each movable contact 16, 17 and make contact 1 are securely connected.
The drive card 22 is electrically connected to the drive card 9.
The push position must be determined. However, in the electromagnetic relay configured as described above, the yoke 5 and the magnetic pole pieces 6 must be inserted into the respective holes 2 and 3 and assembled, and at this time, the armature 10 must also be inserted into the through hole 3 and positioned. Furthermore, the break contact and the external lead-out terminal 18 must be integrally formed by molding, the movable contacts 16 and 17 must be fixed by welding, etc., and the make contact 19 must be precisely aligned and placed. Must be. Then, after this, coil bobbin 1 and base spring block 13
After that, the drive card 22 must be installed. Therefore, it is very difficult and complicated to position and assemble the above-mentioned parts with high precision.

Therefore, an object of the present invention is to provide a method for assembling an electromagnetic relay that can be easily assembled with high precision.

[Means and actions for solving problems]

According to the present invention, in the first step, a through hole in which a coil is wound and an armature is inserted and a mounting fixing step for fixing the yoke are formed, and the armature is inserted into the through hole of the coil bobbin in which the coil is wound, and the yoke is inserted. After that, a drive card is installed on the armature and the electromagnet forming body is assembled, and in a second step, a movable contact, a break contact, and an external lead-out terminal that conducts with these movable contacts and break contacts are molded. A contact is made by combining an integrally formed first block and a second block in which fitting holes for external lead-out terminals are formed by molding the make contact to set the movable contact, the break contact, and the make contact in a predetermined positional relationship. The component blocks are assembled, and in a third step, the positioning protrusion formed on either the contact component block or the coil bobbin is fitted into the alignment hole formed in the other, and either the contact component block or the coil bobbin is fitted. The final electromagnetic relay is assembled by fitting the hook formed on one side with the hook fitting portion formed on the other side.

〔Example〕

A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded configuration diagram of an electromagnetic relay to which the electromagnetic relay assembly method is applied. coil bobbin 30
A through hole 31 is formed in and a coil 32 is wound around it. The coil bobbin 30 also has terminal through holes 34a and 34b for the coil winding terminal 33.
is formed, and a movable confirmation hole 35 is also formed. 36 is an L-shaped armature,
The long side 36a of this armature 36 is the through hole 3.
It is designed to be inserted within 1. The longitudinal side 36a of the armature 36 has grooves 36b, 3 that engage with support protrusions 37a, 37b of the drive card 37.
6b' is formed, and a groove 36d in which the engagement protrusion 38a of the spring mechanism 38 engages is formed on the short side 36c. Further, 39 is a yoke, and this yoke 39 is formed with a recess 39a into which the coil 32 is fitted. Now, as shown in FIG. 2, the upper surface 31a of the through hole 31 formed in the coil bobbin 30 is formed at a position to set the return position of the armature 36 when the coil 32 is released. Further, the coil bobbin 30 has a yoke 39.
Fixed steps 31b, 31 to set the mounting position of
b′ is formed. And this fixed step 31
b31b' is located at the coil 32 as shown in FIG.
The movement of the armature 36 during energization is stopped, and the push of the drive card 37 ensures electrical connection between the movable contacts 47 to 50 and the make contacts 64 to 67, which will be described later. There is. Furthermore, positioning protrusions 31c and 31c' are formed in the lower part of the coil bobbin 30 for pushing the drive card 37 to predetermined positions of the respective movable contacts 47 to 50 when combined with the contact forming block body 40. A hook 31d is formed to prevent the combination with the component block 40 from coming off, that is, from floating on the drive card 37 side. The positioning protrusions 31c, 31c' each have a polygonal shape as shown in FIG. Moreover, the coil winding terminal 33
, a first winding end 33a having chipped parts a1 and a2 and a second winding end 33b having chipped part a3 are formed, and these first winding end 33a and second winding end 33 are formed.
An external lead terminal 33c is formed extending from b. Stop projections 33d and 33e are formed on this external lead-out terminal 33c. Also, 30
a is a retaining groove for the adhesive. In this way, the electromagnet forming body is constituted by each member explained above.

The spring mechanism 38 returns the armature 36 from the movement position when the coil 32 is energized to its original position when the coil 32 is released.

On the other hand, reference numeral 40 denotes a contact forming block body, which is composed of a first block 41 and a second block 42. The first block 41 is shown in FIGS.
As shown in the figure, break contacts 43 to 46, movable contacts 47 to 50, and these break contacts 43 to 4
6. It has external terminals 51 to 58 that are electrically connected to the movable contacts 47 to 50, respectively, and these break contacts 43 to 46, movable contacts 47 to 50, and external terminals 51 to 58 are formed by molding 59. It is integrally formed. And each external terminal 5
1 to 58 are provided with fixing protrusions 51a to 58a. In addition, to specifically explain the electrical connections, each break contact 43 to 46 is connected to an external terminal 51 to 54, respectively, and each movable contact 47 to 5 is connected to an external terminal 51 to 54, respectively.
0 are connected to external terminals 55-58 via bent portions 60-63, respectively. Second block 42
As shown in FIG. 1, make contacts 64 to 67 and external terminals 68 and 69 electrically connected to these make contacts 64 to 67 are molded into
It is integrally formed by 0. Note that external terminals electrically connected to the make contacts 66 and 67 are omitted for illustration purposes. The second block 42 also has external terminals 51 of the first block 41.
Fitting holes 71 to 78 are formed into which the coil bobbin 30 is inserted, and a hook fitting part 79 is formed which fits into the hook 31d formed on the coil bobbin 30 and becomes integral with the electromagnet forming body. or,
The second block 42 is formed with positioning holes 80, 80 which fit into positioning protrusions 31c, 31c' formed on the coil bobbin 30 for positioning. Reference numerals 82 and 83 are fitting holes into which the respective coil winding terminals 33 are inserted.

Next, a procedure for assembling the electromagnetic relay configured as described above will be explained.

First, in a pre-process, the coil winding terminal 33 is inserted into each terminal through hole 34a, 34b. Then, a relatively small-diameter winding is wound around the notch a1, then around the notch a2, and then passed from the notch a2 to the notch a3 with a margin and then wound around the notch a3 again. After that, the winding is wound around the coil bobbin 30 a predetermined number of times, and the coil 32 is
form. After forming this coil 32, the winding wire is wound around the second winding end of the other coil winding terminal 33, and then around the first winding end. Note that the winding wound around the notch a1 is soldered.

Next, in the first step, the yoke 39 is removed from the recess 39a.
The coil 32 is fitted into the coil 32, and the armature 36 is inserted into the through hole 31 with the fixing plate 39a interposed therebetween. At this time, the yoke 36 is positioned by each fixed step 31b, 31b' as shown in FIG. Note that the spring mechanism 38 is fixed to the yoke 39 in advance. Then, drive card 3 is inserted into each groove 36b, 36b of armature 36.
At the same time, the support projections 37a and 37b of 7 are locked, the projection 39b of the yoke 39 is positioned in the movement groove 37c, and the support piece 38c of the spring mechanism 38 is inserted into the support projection 37d. In this way, the electromagnet structure with the spring mechanism 38 fixed thereon is assembled as shown in the perspective view of FIG.

Further, in the second step, each of the external lead-out terminals 51 to 58 of the first block is fitted into the fitting hole 71 to 78, respectively.
and each fixing protrusion is inserted into each fitting hole 71 to 7.
8 and are forcibly fitted together to form a contact forming block 40 as shown in FIG.

Thus, in the third step, each coil winding terminal 33, 33 is inserted into each fitting hole 82, 83, and each stop protrusion 33e is inserted into each fitting hole 82, 83.
Forcibly fit inside. Along with this, a hook 31d formed on the coil bobbin 30 is attached to the second block 4.
The positioning protrusions 31c, 31c' are fitted into the hook fitting portions 79 formed in the positioning holes 80, 81, respectively. As a result, the electromagnetic relay shown in the perspective view of FIG. 9 is assembled, and as shown in FIG. 10, the outer cover 84 is placed on it and further fixed with an adhesive. Note that if there is a large amount of adhesive, it will enter the inside from the outer cover 90, but this adhesive will enter the retaining groove 30a.
It accumulates and does not reach the coil 32, each movable contact 47 to 50, etc.

With such a configuration, the armature 36 moves in the direction of arrow A shown in FIG. 3 when the coil 32 is energized, and in response to this movement, the drive card 37 connects the movable contacts 47 to 50. Push to connect each movable contact 47-50 and each make contact 64-67. Further, when the biasing of the coil 32 is released, the armature 36 is moved in the direction of arrow B by the biasing force of the return spring 38c, and is returned to the position before the biasing of the coil 32.

In this way, in the first embodiment, the through hole 31 is formed to determine the return position of the armature 36, and the yoke 39 is fixed to the steps 31b, 31.
Since it is fixed at b', the displacement of the armature 36, that is, the stroke of the drive card 37, can be easily and accurately set to a predetermined value. Drive card 3 at the same time
7 and each of the movable contacts 47 to 50 can be set to a predetermined value. On the other hand, the contact constituting block body 40
can be easily constructed by simply combining the first block 41 and the second block 42, and in particular each movable contact 47
~50, each positional relationship of the break contacts 43-46 and the make contacts 64-67 can be set easily and with high precision. And each fixing protrusion 51a to 58a
This makes it difficult for the first block 41 and the second block 42 to separate. Furthermore, positioning protrusion 31
By fitting the positioning holes 80, 81 with the positioning holes 80, 81, the drive card 37 can accurately position each movable contact 47-50 at a predetermined position to push the movable contacts 47-50 and each make contact. 64 to 67 can be reliably connected.

Further, the above embodiment can provide the following effects. Since the coil 32 is fitted into the recess 39a, the number of turns of the coil can be increased in order to increase the electromagnetic attraction force, and the overall electromagnet formation body can be made smaller.
Furthermore, the drive card 37 has engaging protrusions 37a and 37b.
The armature 36 is supported on both sides of the moving groove 37.
c is formed, the long side 3 of the armature 36
The opposing area between the yoke 6a and the yoke 39 can be increased, increasing the electromagnetic attraction between them, and the use of the coil winding terminal 33 creates a buffer against vibrations of the winding, making it possible to use a winding with a very small diameter. Available coil 3
The number of turns of 2 can be increased. Therefore, the electromagnetic force can be increased with a small size. Furthermore, the movement state of the movable contact 36 can be monitored through the movement confirmation hole 35, and the operation of the relay can be confirmed.

Next, a second embodiment will be described with reference to an exploded configuration diagram shown in FIG. 11. Note that the same parts as in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted. Now, what is particularly different from the electromagnetic relay shown in FIG. 1 is that the armature 90 is formed into a plate shape, and corresponding to the shape of the armature 90, a coil bobbin 91, a yoke 92, a drive card 93, and a hinge spring 94 are arranged. have different shapes.
The armature 90 is the hinge spring 9 when viewed from above.
The drive card 93 is formed into a T-shape with a large area on one end side, and grooves 90a and 90b are formed on the other end side, in which the support projections 93a and 93b of the drive card 93 engage. The coil bobbin 91 has a through hole 91
A support protrusion 9 that engages with a support hole 94a of a hinge spring 94 is provided at the upper part of the side where the armature 90 of a is inserted.
1b and a support arm 91c are formed. In addition,
A drive confirmation hole is not formed in this coil bobbin 90, but it is possible to form one. 91d is a hook, and 91e is an adhesive escape groove. Furthermore, a protrusion 92a is formed on the yoke 92 to support the moving shaft of the armature 90. The drive card 93 is formed with the support projections 93a, 93b and a movement groove 93c for the armature 90.

Next, a procedure for assembling the electromagnetic relay configured as described above will be explained. Insert the coil winding terminal 33 into the coil bobbin 91 and
After winding the wire around the coil bobbin 91, the winding wire is wound around the coil bobbin 91 a predetermined number of times to form the coil 32. Next, the armature 90 is inserted into the through hole 91a of the coil bobbin 91, and at this time, the support hole 94a of the hinge spring 94 is engaged with the support protrusion 91b to support it. Then, the coil 32 is placed in the recess of the yoke 92.
is inserted to the fixed step (not shown) of the coil bobbin 91, and the side of the armature 90 to which the hinge spring 94 is fixed is placed on the protrusion 92a of the yoke 92. Next, each support protrusion 93a, 93b of the drive card 93 and each groove 90 of the armature 90
a and 90b are engaged, and the moving protrusion 92b of the yoke 92 is disposed within the moving groove 93c. The electromagnet formation is thus assembled. After this, the contact structure block body 40 and this electromagnet formation body shown in FIG.
c, 31c', and are connected by alignment holes 80, 81.

It is clear that even if the armature 90 is formed into a plate shape as shown in the second embodiment, it can be easily assembled in the same manner as in the first embodiment. Therefore, it goes without saying that the same effects as in the first embodiment can be achieved.

Note that the present invention is not limited to the above embodiments, and may be modified without departing from the spirit thereof. For example, the number of break contacts, movable contacts, make contacts, and external terminals provided in the contact block 40 may be increased or decreased depending on the location where the electromagnetic relay is used. Further, a fixing protrusion is formed on the second block, and an alignment hole is formed on the coil bobbin.
In addition, the hook may be formed on the second block and the hook fitting portion may be formed on the coil bobbin.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide a method for assembling an electromagnetic relay that can be easily assembled with high precision.

[Brief explanation of drawings]

1 and 2 are exploded configuration diagrams showing a first embodiment of an electromagnetic relay to which the electromagnetic relay assembly method according to the present invention is applied, and FIG. 3 is a diagram showing the pushing operation of a drive card in the same relay, Figure 4 is a shape diagram of the positioning protrusion, Figures 5 and 6 are configuration diagrams of the contact forming block, Figure 7 is an external view of the electromagnet forming body, Figure 8 is an external view of the contact forming block, and Figure 8 is an external view of the contact forming block. 9
The figure is an external view of an electromagnetic relay, Fig. 10 is an external view with an outer case covered, Fig. 11 is an exploded configuration diagram showing a second embodiment of the present invention, and Fig. 12 is a configuration diagram of a conventional electromagnetic relay. . 30, 91... Coil bobbin, 31, 91a... Through hole, 31c, 31c'... Positioning protrusion, 31d...
Hook, 32... Coil, 33... Coil winding terminal,
36,90... Armature, 37,93... Drive card, 38... Spring mechanism, 39,92... Yoke, 4
0...Contact configuration block body, 41...First block,
42... Second block, 43-46... Break contact, 47-50... Movable contact, 51-58... External lead-out terminal, 71-78... Fitting hole, 79... Hook fitting part, 80, 81... Positioning hole, 94...Hinge spring.

Claims (1)

[Claims] 1. The armature is inserted into the through-hole of the coil bobbin, which has a through-hole in which the coil is wound and the armature is inserted, and a fixing step for mounting the yoke is formed, and the yoke is positioned and provided by the fixing step. A first step of assembling an electromagnet forming body by providing a drive card on the armature, and a first block and make in which a movable contact, a break contact, and an external lead-out terminal that conducts with these movable contacts and break contacts are integrally formed by molding. A contact forming block body is assembled by molding the contacts and combining them with a second block in which fitting holes for the external lead-out terminals for setting the movable contact, the break contact, and the make contact in a predetermined positional relationship are formed. 2 steps, fitting the positioning protrusion formed on either one of the contact forming block body or the coil bobbin with the positioning hole formed on the other, and fitting the positioning protrusion formed on either the contact forming block body or the coil bobbin to either the contact forming block body or the coil bobbin. A method for assembling an electromagnetic relay, comprising a third step of assembling the formed hook and the hook fitting portion formed on the other side into a final electromagnetic relay.