JPS60208019A - Method of producing contact block - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a contact Lλ block which is incorporated into an electromagnetic appliance or the like.

From before, i! In magnetic vertical relays, etc., a hoop material is punched out to form a normally closed fixed contact plate piece, a normally open fixed contact plate piece, and a pedestal piece, and then both plate pieces are integrally connected with an insulating material. Next, as shown in Fig. 1(a), contact NO is welded to the surface of normally closed fixed contact plate piece A, and after welding, IX! In turn, a contact NO is welded to the surface of the normally open fixed contact plate piece B opposite to the surface to which the contact NC is welded. After that, as shown in Fig. 1<b), the plate piece B for the normally closed fixed contact and the plate piece A for the normally open fixed contact are each placed in one piece so that the contact No. and the contact NC face each other. bend. After the bending is completed, one end of the movable contact plate piece provided with the separately produced movable contact (not shown) is welded to the pedestal piece (not shown). At this point, the movable contact is contact NO.
It is necessary to position it accurately so as to reliably face contact point No.

In this way, a contact block is formed. However, this method has the drawback that variations tend to occur in the positional relationship of the contacts when they are integrated into a contact block, and work such as adjusting the positional relationship of the contacts when combining them is extremely complicated and takes a lot of time. there were. In particular, the bending positions of the normally closed fixed contact plate piece A and the normally open fixed contact plate piece B are not determined accurately in relation to the insulating block 7, and the contacts NC and No.
When placing a movable contact between the two, a special jig is required, which is a problem that hinders the miniaturization of the relay.

The present invention has been made in view of these drawbacks, and provides a contact block in which each contact plate piece is integrally formed into one insulating block, thereby eliminating the need for position adjustment between contacts during assembly. The purpose is to provide a manufacturing method for.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

First, in the first production line, the first hoop material 1 in the shape of a belt as shown in FIG. ,
4a and 5a, respectively, on the left and right so that the right handle = 1 connection piece 2, pedestal piece 3, plate for normally closed fixed contact) 14, and plate piece 5 for normally open fixed contact on the left and right so that the line pair 1: h with respect to the center line. They are arranged in a pair and punched into a shape connected by a connecting part 6. In this punching process, pitch holes 7 are punched out in the connecting portion 6.

Next, this first hoop material 1 is sent to a molding device (not shown), which includes a coil connecting piece 2, a pedestal piece 3.2, a plate piece 4 for a closed fixed contact, and a plate for a normally open fixed contact. The middle part of the piece 5 is covered with a mold of a molding device, and a pair of left and right insulating blocks 8 made of an insulating material are formed as shown in FIG. 4 1J.

Next, the first hoop material 1 is sent to a cutting device (not shown), and the connecting portions 6a, 6b at the tips of the base piece 3, the normally closed fixed contact plate piece 4, the normally open fixed contact plate piece 5, Cut off 6C.

Next, the first hoop material 1 is sent to a contact fixing device (U shown in the figure), and a plate piece 4 for a normally closed fixed contact and a plate piece 5 for a normally open fixed contact are provided.
Contacts 9 and 10 are mounted on one side of each 114-.

On the other hand, in the second production line, as shown in FIG. 5, a second hoop material 11 having a width narrower than the first hoop material 1 and having a strip shape is sequentially fed to a punching device (not shown). The two movable contact plates 12 and 12 are rearranged into a pair so as to be line symmetrical with respect to the center line, and punched into a shape in which they are connected at a connecting part 13. In this punching step, a pitch hole 14 is punched out in the connecting portion 13 with the same pitch as the pitch hole 7 of the first hoop material 1.

The width of the second hoop material 11 is set to be equal to (or slightly smaller than) the distance between the pair of left and right insulating blocks 8.8 of the first hoop material 1.

Next, the second hoop material 11 is attached to a contact fixing device (not shown).
As shown in FIG.
Contacts 15 and 16 are fixed on both sides of the tip of the holder.

Next, as shown in FIG. 7, the connecting portion 13a at the tip of the movable contact plate piece 12 of the second hoop material 11 is cut off, and the intermediate portion 12a of the movable contact plate piece 12 is tension bent.

Next, as shown in Fig. 8, the second
The hoop material 11 is fitted between a pair of insulating blocks 8.8 of the first hoop material 1 on the first production line, and the pitch hole 7 of the first hoop material 1 and the second hoop material 11 are connected to each other. Align the pitch holes 14 so that the tip side bent by one tension points upward.Then, attach the base 12a of the movable contact plate piece 12 to the pedestal of the first hoop material 1. It sticks to piece 3.

Next, the connecting portion 13 of the movable contact plate piece 12 of the second hoop material 11 on the base 12a side is sent to a cutting device (not shown).
Cut off b as shown in Figure 9.

Next, they are sent to a folding device (not shown), and the base piece 3, the normally closed fixed contact plate piece 4, and the normally open fixed contact plate piece 5 are folded into the insulating block 8, as shown in FIG. Place lCI on the corner and bend it at right angles from the bottom side to the top side.
are in contact with each other, and the contact 10 of the normally open fixed contact 1+j- plate piece 5 and the contact 16 on the lower surface side of the movable contact plate 12 are in a state facing each other.

Next, the terminals 2a, 3a, 4a of the first hoop material 1
, 5a are cut off, and the connecting portion 6h at the tip of the coil connecting piece 2 is cut off into an approximately L-shape. As shown in FIG. Two contact blocks 20.20 are obtained in a pair.

A pair of left and right contacts manufactured as described above [1 2
0.20 to the yoke 2 of the electromagnet 21 as shown in FIG.
I can complain to both the left and right sides of 2. That is, after the armature 23 and the hinge spring 24 are arranged at the corner of the yoke 22, the protrusion 22a of the yoke 22 is fitted into the fitting hole 8a of the insulating block 8. Then, after connecting the winding start and winding end of the electromagnet 21 to the coil connection) 122, a box-shaped cover 2 with an opening on the bottom is installed.
5 from above the electromagnet 21, insert the terminals 2a, 3a, 4a, and 5a into the terminal holes 26a of the bottom swallow 2G from the bottom, and attach the bottom cover 26 to the bottom of the cover 25 (l+J).

Therefore, when the electromagnet 21 is energized, as shown in FIG. J on the other end of the pole 23 is the plate piece 1 for the movable contact.
2 is pressed downward, and the contact 15 of the movable contact plate 12 is separated from the contact 9 of the normally closed fixed contact plate 4, and the contact of the movable contact plate 12 is separated from the contact of the normally open fixed contact plate 5. 16 makes contact.

The contact switching operation is performed in this manner.

In the contact block 20 having the above configuration, the coil connection piece 2 of the first hoop material 1, the pedestal piece 3, the normally closed fixed contact plate 14, and the normally open fixed contact plate 5 are always attached to the insulating block 8 with the same precision. Furthermore, the second hoop material 11 is fitted between the pair of insulating blocks 8.8 and aligned by the pitch holes 7.14, and the movable contact plate piece 1 is positioned at an accurate position.
2 is not only fixed to the pedestal 3, but also the pedestal piece 3, the normally closed fixed contact plate piece 4, and the normally open fixed contact plate piece 5 are attached to the corners of the insulating block 8, as shown in FIG. Just by bending along the edges, the positional relationship of each contact point can be maintained accurately without any variation.

Note that the method for manufacturing a contact block of the present invention is not limited to the above-mentioned Pumi example, and for example, the shape of each contact plate piece, the shape of the connecting portion, etc. can be arbitrarily selected.

As described above, in the present invention, each contact is welded to one side of the normally closed fixed contact plate piece and the normally open fixed contact plate piece only from the 1/J side, so there is no need to reverse the hoop material. ,
Contact blocks can be manufactured automatically through a series of continuous processes. Moreover, the positioning between the contacts can be performed accurately, and the contact plates 11 can be placed in an accurate positional relationship without variation, and work such as position adjustment is completely unnecessary.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are side views showing the main parts of a conventional contact block.
The figure (b) shows the state after bending. 2 to 11 are diagrams showing an embodiment of the method for manufacturing a contact block of the present invention. FIG. 2 t is a perspective view showing a part of the first hoop (A), and FIG. FIG. 4 is a perspective view showing a state in which the material is punched out, and an insulating block is further formed,
A perspective view showing a state in which a part of the connecting part is cut f:i,
Fig. 5 is a perspective view showing the second hoop material, Fig. 6 is a perspective view showing the state in which the second hoop material is covered with T-J I and the contacts are fixed, and Fig. 7 is a perspective view showing the second hoop material. Furthermore, a perspective view showing a state in which a part of the connecting part has been cut off and subjected to a seven-piece bending process, and FIG. Fig. 9 is a perspective view showing a state in which the connecting portion of the second hoop material is partially cut off, and Fig. 10 shows the pedestal piece and the normally closed fixed contact plate piece. FIG. 11 is a perspective view showing a state in which the normally open fixed contact plate piece is bent, and FIG. Fig. 12 is an exploded perspective view showing the method of assembling the electromagnetic relay, Fig. 13 is a sectional view of the main parts of the electromagnetic relay showing the contact switching operation, and Figs. 14 (a) and (b) are These are side views showing the main parts of this embodiment, in which (a) shows the state before bending, and (1) shows the state after bending. DESCRIPTION OF SYMBOLS 1... First hoop material, 2... Coil connection piece, 3... Pedestal piece, 4... Normally closed fixed contact plate piece, 5 ......": F ff1l captive contact plate piece, 6...Connection part, 7...Pitch hole, 8...Insulation block, 9.10・・・・・・
...Contact, 11...Second hoop material, 12...
...Plate piece for movable contact, 13...Connection part, 1
4...Pitch hole, 15.16...Contact, 20...Contact block, 21...Electromagnet, 22...Yoke, 23... Armature, 24... Hinge spring, 25... Cover, 26... Bottom cover. Patent applicant Anritsu Electric Co., Ltd. Agent Patent attorney Makoto Hayakawa 13th country: Q-

Claims (1)

[Claims] Process of processing a first hoop material into a shape in which a normally closed fixed contact plate piece with a terminal on one end, a normally open fixed contact plate piece, and a pedestal piece are connected at a connecting part. and; covering predetermined portions of each of the normally closed fixed contact plate piece, the normally open fixed contact plate piece, and the pedestal piece of the first hoop material with an insulating material to mold an integral insulating block; A step of separating a predetermined end of the pedestal piece of the first hoop material from the connecting portion; and a step of fixing the contact to the normally closed fixed contact plate piece and the normally open fixed contact plate piece of the first hoop material. a step of punching out movable contact plate pieces from the second hoop material into a shape connected at a connecting portion; a step of fixing the contacts to the movable contact plate pieces of the second hoop material; the second separating a predetermined end of the movable contact plate piece of the hoop material from the connecting part, and subjecting the separated movable contact plate piece to a tension bending process; a step of overlapping the movable contact plate piece of the second hoop material so that their bases match and fixing the pedestal piece and the base of the movable contact plate piece; the movable contact plate piece of the second hoop material; a step of separating a predetermined end portion of the first hoop material from the connecting portion; bending the normally closed fixed contact plate C, the 7:1 open constant contact plate piece, and the pedestal C of the first hoop material to form a movable contact plate; a step of opposing the contacts of the normally closed fixed contact plate and the normally open fixed contact plate of the first hoop material; and the normally open fixed contact plate of the first hoop material A method for manufacturing a contact block, which includes the step of cutting a predetermined end of a plate piece from a connecting part.