JPH0797458B2 - Method of manufacturing contact block - Google Patents

Description

The present invention relates to a method for manufacturing a contact block that constitutes an electromagnetic relay.

[Conventional technology]

FIG. 12 is an exploded configuration diagram of the electromagnetic relay, and the electromagnetic relay includes an electromagnet structure 1 and a contact block 2. The electromagnet structure 1 is configured such that a coil 4 is wound around an iron core 3, and a yoke 5 and an armature 6 are further provided. On the other hand, the contact block 2 has a base 7 provided with a movable spring 8 and fixed contacts 9 and 10. When assembling the electromagnetic relay having such a configuration, the movable spring 8 and the fixed contacts 9 and 10 are provided on the base 7, respectively, and then the electromagnet structure 1 and the contact block 2 are combined.

[Problems to be solved by the invention]

However, in the above assembling method, the movable spring 8 and the fixed contacts 9 and 10 are separately provided in the contact block, so that the movable spring 8 and the fixed setting 9 and 10 are separately provided.
There is a problem that it is very difficult to align and improve the dimensional accuracy, and the workability is poor.

Therefore, it is an object of the present invention to provide a method of manufacturing a contact block, which can achieve high positioning and dimensional accuracy and can be manufactured easily.

[Means and Actions for Solving Problems]

The present invention relates to a method of manufacturing a contact block for forming a contact block for an electromagnetic relay by using a piece for external connection terminal obtained by subjecting a conveyed hoop material to a punching process. Punching process A in which the first hoop material being conveyed is punched to form terminal pieces.
₁ and a welding step A _{2 of} welding a contact to a predetermined portion of the external connection terminal piece formed on the first hoop material, and a plurality of movable spring pieces are formed to form a plurality of movable spring pieces. a punching step a ₃ blanking two hoop material, to each external connection terminal strip in each row of the first hoop member, registering weld overlapping a corresponding strip for the movable spring of each row of the second hoop member Welding process
And A _4, the cutting step A ₅ to cut the pieces for each movable spring that is welded from the second hoop member, a surface perpendicular direction of each external connection terminal strip in each row of the first hoop member first hoop member in the step a ₆ bent bending, as in the insertion holes of the plurality having a plurality of insertion holes over a plurality examples of the base member, a bending processed each external connection terminal strip in each row is fixed , A press-fitting step C ₁ for press-fitting and fixing each base member, and a cutting step C ₂ for cutting each external connection terminal piece into which each base member is press-fitted from the first hoop material to obtain a contact block It is a method of manufacturing a contact block that achieves the above object.

〔Example〕

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

FIG. 1 is an overall process diagram of the present manufacturing method, which includes a processing process A, a base molding process B, and a press-fitting cutting process C. First, the processing step A will be described with reference to FIGS.
It will be described with reference to the drawings. Positioning holes 11, 12, 13, 14, ... Are formed in the band-shaped first hoop material 10 conveyed through the manufacturing line, and the positioning holes 11, 12, 13, 14, ... Processing or the like is performed. The first hoop material 10 is punched to form external connection terminal pieces 15 to 22 in a plurality of rows as shown in FIG. Both ends 10a and 10b of the hoop material 10 will be referred to as frames hereinafter. Next, as shown in FIG. 3, the contacts 23, 24, 25 and 26 are connected to the original portions of the external connection terminal pieces 18 and 22 by welding. When this welding is completed, the external connection terminal pieces 15 to 22 are then attached to the hoop material 10 as shown in FIG.
Are cut off from the frames 10a and 10b, respectively. In FIG. 4, the external connection terminal pieces 17, 18, 21, 22 are cut off from the frames 10a, 10b. Note that this cutting off is performed by laser light or the like.

On the other hand, in the processing step A, at the same time as the processing of the first hoop material 10, as shown in FIG. 5, the band-shaped second hoop material 30 conveyed through another manufacturing line is punched. Movable spring pieces 31, 32, 33, 34 are formed. In addition,
One of the movable spring pieces 31 to 34 is divided into two. Next, the contacts 35 to 38 are connected by welding to the two divided sides of the movable spring pieces 31 to 34, respectively. The two sides of the movable spring pieces 31 to 34 are cut off from the frame 30a, and then tension bending is performed on the movable spring pieces 34 to 34 as shown in FIG. Be done. When this tension bending process is completed, the second hoop material 30 is then cut and separated at the center line as shown in FIG.
It becomes 30a and 30b.

Next, with respect to the first hoop material 10 shown in FIG. 4 created by the above processing, each second hoop material 30a, 30b shown in FIG.
The movable springs 32 and 34 are connected by welding to obtain the structure shown in FIG. Here, the positioning of the first hoop material 10 and the respective second hoop materials 30a, 30b is performed by the positioning holes 11-14 of the first hoop material 10 and the positioning holes 39- of the respective second hoop materials 30a, 30b. Performed by 46. When this welding is completed, each frame portion of each second hoop material 30a, 30b is cut and removed. Thereafter, as shown in FIG. 9, the external connection terminal pieces 15 to 22 are respectively bent. At this time, bending holes 16a, 18a, 20a, and 21a are formed in the bending portions of the external connection terminal pieces 16, 18, 20, and 21, respectively, to facilitate bending.

On the other hand, a base mold forming step B is performed separately from the above processing step A. This base mold forming step B is a step of forming the base of the contact block, and as shown in FIG. 10, it is inserted in a plurality of rows at positions corresponding to the arrangement positions of the external connection terminal pieces 15-22. A base 48 having holes 40 to 47 is formed by molding. Note that the insertion holes 40 to 43 are not shown in FIG. 10 for the sake of illustration.

Next, the press-fitting cutting step C will be described. In the base 48 formed in the base mold forming step B, the external connection terminal pieces 15 to 22 are inserted into the insertion holes 40 to 47 as shown in FIG. 10, and the base 48 is press-fitted in this state. When this press-fitting is completed, the external connection terminal pieces 15 to 22 are cut and separated from the frames 10a and 10b of the hoop material 10 as shown in FIG. Thus, the manufacturing of the contact block 48 is completed. Here, the external connection terminal pieces 15 to 22 are the external connection terminals 50 to 57.
Becomes

As described above, in the above-described embodiment, in the processing step A, the external connection terminal pieces 15 to 22 and the like are punched on the first hoop material 10, the contacts 23 to 26 are welded, and the movable spring pieces 31 to 34 are formed. By welding, after that, the frame of the second hoop material 30 is cut and processed to bend the external connection terminal pieces 15 to 22, and in the base molding step B, the base of the contact block is molded. Base in press-fitting process C
Since the 48 is press-fitted into the external connection terminal pieces 15 to 22 and then the frame of the first hoop material 10 is cut and processed, the positioning of the external connection terminals 50 to 57 and the movable springs is different. High accuracy can be achieved by line positioning of the hoop material 10,30. Also, since the base 48 is created in a separate process and press-fitted, it is easy to assemble and each external connection terminal piece 15-
By inserting 22 into the insertion holes 40 to 47, it is possible to forcibly correct the pitch deviation between adjacent external connection terminals, for example, the external connection terminals 50 and 51, 51 and 52. Therefore, it is possible to manufacture a contact block which is positioned and dimensioned with high accuracy by a simple work process. Also, the pitch between the external connection terminals facing each other, for example, 50 and 54, 51 and 55, can be easily changed.

It should be noted that the present invention is not limited to the above-described embodiment, and may be modified without departing from the spirit of the invention. For example, the cutting process of the frame or the like is not limited to laser light, and ultrasonic waves or a disc cutter may be used.

〔The invention's effect〕

As described above, according to the method of manufacturing a contact block of the present invention, after punching each piece for external connection contact terminal and each piece for each movable spring in the hoop material, the piece is bent, and then pressed into the base at the same time. There is. In addition, a plurality of rows of insertion holes are formed in this contact block on one base and press-fitted into each bent external connection terminal piece of each row.

Therefore, not only the positioning accuracy between the external connection terminals belonging to the same row arranged over a plurality of rows constituting the electromagnetic relay but also the positioning accuracy between the external connection terminals belonging to different rows are greatly improved. Therefore, the positioning accuracy between all the external connection terminals that form the electromagnetic relay can be significantly improved.

Further, on the first hoop material, punching processing of the external connection terminal piece, welding of contacts, welding of the movable spring piece formed on the second hoop material, cutting of the second hoop material, and external connection terminal piece Bending and press fitting of the mold are performed.
Then, in the final step, the completed contact block is cut from the first hoop material.

As described above, since the parts of the contact block are sequentially assembled and manufactured on the first hoop material, the manufacturing process of the electromagnetic relay is greatly simplified, and as a result, the manufacturing work efficiency can be further improved.

Moreover, a plurality of semi-finished parts are not produced in the process of manufacturing the electromagnetic relay. As a result, the step of reassembling these plural semi-finished parts can be eliminated, the manufacturing process of the electromagnetic relay can be simplified, and the manufacturing work efficiency can be improved.

[Brief description of drawings]

1 to 11 are views for explaining an embodiment of a method for manufacturing a contact block according to the present invention. FIG. 1 is an overall process drawing, and FIGS. 2 to 9 are processing processes. Figure showing, No.
10 and 11 are diagrams showing a base molding process and a press-fitting process, and FIG. 12 is a diagram for explaining a conventional technique. 10 …… First hoop material, 11-14 …… Positioning holes, 15-22
...... External connection terminal pieces, 23 to 26 ...... Contacts, 30a, 30b ......
2nd hoop material, 31-34 …… Movable spring piece, 48 …… Base.

Front page continuation (72) Inventor Manabu Tanaka 5-1027 Minamiazabu, Minato-ku, Tokyo Within Anritsu Co., Ltd. (56) Reference JP-A-60-208019 (JP, A) JP-A-48-69072 ( JP, A)

Claims (1)

[Claims] 1. A method of manufacturing a contact block for forming a contact block for an electromagnetic relay by using a piece for external connection terminal obtained by subjecting a conveyed hoop material to a punching process, the method comprising: A punching step A ₁ of punching the first hoop material to be conveyed to form a connecting terminal piece, and welding for welding a contact to a predetermined portion of the external connecting terminal piece formed on the first hoop material. and step a _2, to form a plurality of movable spring piece over a plurality of rows, the punching step a ₃ blanking the second hoop material conveyed, each external of each column of the first hoop member the piece connection terminal disconnection, the welding process a ₄ corresponding welding superposed pieces for each of the movable spring of each row of the second hoop member, each movable spring piece which is the welded from the second hoop member Cutting step A ₅ to be carried out and each outside of each row of the first hoop material And Step A ₆ bent bending part connection terminal strip on the surface perpendicular direction of the first hoop member, each insertion hole of the plurality having a plurality of insertion holes over a plurality Examples of the base member, the bending as the external connection terminal strip of each column is fixed, the stuffing step C ₁ for press-fitting the respective base members, the first of each external connection terminal pieces each base member is pressed A method of manufacturing a contact block, comprising: a cutting step C ₂ for cutting the hoop material to obtain the contact block.