JP3034712B2 - Manufacturing method of push button switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fixed contacts and terminals.
The method of manufacturing a push button switch using a metal wire material as a material.

[0002]

2. Description of the Related Art Conventionally, as a push button switch and a method of manufacturing the same, for example, there is a switch disclosed in Japanese Utility Model Laid-Open Publication No. 56-22022. That is, as shown in FIG. 5, the push button switch and the method of manufacturing the same use two metal wires 41 as the material of the fixed contact and the terminal, and attach a plurality of cases 42 to the two metal wires 41 held in parallel. After being sequentially molded, the metal wire 41 between the cases 42 is cut into single pieces,
The wire exposed at 3 is a fixed contact 44. afterwards,
The movable contacts 45 and 46 and the operating member 4
7 is stored.

[0003]

However, in the above-described manufacturing method, two wires 41 must be used, and the two wires 41 must be held in parallel when the case 42 is molded. Was.

[0004] Therefore, it is necessary to use two wires as the material cost of the fixed contact and the terminal, and it is difficult to reduce the cost.
Molding the case 42 while holding the two wires 41 in parallel requires extremely high precision, and it is difficult to improve the productivity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of manufacturing a push button switch which can use wires without waste, can realize a low cost with minimum materials, and is excellent in productivity.

[0006]

[Means for Solving the Problems] In order to solve the above-mentioned problems
In the present invention, a continuous wire rod is formed into a case having an opening concave portion.
The pair of fixed contacts and the fixed contacts are buried in the opening recess of the case.
Forming a terminal extending from the fixed contact, and
An elastic movable contact for electrically opening and closing the fixed contact.
In the method of manufacturing a push button switch for storing
Pressing the fixed contact shape by holding one wire in one mold
Formed and cut a part of the fixed contact shape to face
(2) Then, a concave portion of the mold is formed.
Inject synthetic resin into part of fixed contact and terminal
Is formed to embed a case .

In addition, a continuous wire rod is formed into a case having an open recess.
A pair of fixed contacts embedded in the case
And a terminal extending from the fixed contact, and
It has elasticity to electrically open and close the fixed contacts
In a method of manufacturing a push button switch accommodating a moving contact,
(1) Fixed contact type with one wire sandwiched in the first mold
Shape and cut a part of the fixed contact shape
To form a pair of fixed contacts facing each other, (2)
Synthetic resin is injected into the concave part of the mold, and a part of the fixed contact is
After forming the fixing ring with embedded terminals
(3) holding the fixing ring in the second mold;
Inject synthetic resin into the mold of Part 2 and part of the fixed contact
And forming a case in which the above terminals are embedded.
It is a sign.

[0008]

[Function] As a material for fixed contacts and terminals, one wire
To fix the fixed contact shape in the same mold.
Formed and cut a part of the fixed contact shape to face
Forming a pair of fixed contacts and then fitting them into the recesses of the mold.
Injects synthetic resin to bury part of fixed contacts and terminals
Formed case (fixing ring)
Material can be halved from two to one, and one pair
The fixed contacts and terminals are formed and fixed in the same mold.
Therefore, when insert molding into the case,
The determination can be made easily and with high precision.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
I will explain. As shown in FIG.
A case 16, an elastic movable contact 28,
It is composed of a member 29 and a cover 30.

At the bottom of the opening recess 24 of the case 16, a round
A pair of fixed contacts 12a, 12b formed from a wire
The fixed contacts 12a, 12
The terminals 25 respectively extending from the b.
Is almost vertically bent from the base of
You. The tip of the terminal 25 is in contact with the transport tape 27.
The flat portion 26 is formed by crushing or the like so as to increase the wearing strength.
Are formed.

The movable contact 28 is provided in the open recess 2 of the case 16.
4 and above the fixed contacts 12a and 12b
It has been placed.

The cover 30 is connected to the movable contact 28 and
Provided to hold the operating member 29 in the opening recess 24
Have been.

With the above configuration, the operating member 29 is
When pressed, the movable contact 28 bends within the opening recess 24.
As a result, the fixed contacts 12a and 12b come into contact with each other to establish electrical connection.
You.

Next, a method of manufacturing the above push button switch will be described.
I do. First, a first embodiment of the present invention will be described with reference to FIGS.
It is explained based on.

The mold shown in FIG . 3a) is the same as the primary mold shown in FIG. 2a).
FIG. 3 a) is a mold for molding the molded part 15.
One circular section between the first molding dies 1 and 2
2 shows a state in which the wire 11 is stretched. And the first
A groove 3, a protrusion 4, and a
A punch hole 5 in the middle of the projection 4 and a key around the projection 4.
A cavity 6 is formed. In addition, the first mold
The other mold 2 also has a groove 3, a protrusion 4 of the molding mold 1,
A groove 7 is provided at a position facing the punch hole 5 and the cavity 6.
The concave portion 8, the punch hole 9, and the cavity 10 are respectively
Is provided.

Using the above molding dies 1 and 2, a primary molding portion
A method for forming the article 15 will be described below. Mold 1
And 2 are closed, the wire 3 is narrowed by the grooves 3 and 7.
2a) into the wire 11 by the projection 4 and the recess 8
The fixed contact portion 12 shown is formed by press working. So
Then, insert punch 13 into punch holes 5 and 9 and fix
Two fixed contact portions facing each other by cutting a part of the contact portion 12
Form 12a and 12b.

Thereafter, the cavity 6 and the cavity 1
The molten synthetic resin is injected into the fixing resin shown in FIG.
Of the wire 14 continuously on the wire 11 at regular intervals
I do.

Next, the primary element formed as described above is used.
Case 16 is formed from molded part 15 by molding again
The mold and the method used for this will be described.

The mold shown in FIG . 3B) is the same as the mold shown in FIG .
FIG. 3b) A second molding die for molding the mold 16
Is a primary component between the opened second molds 17 and 18.
This shows a state where the shaped part 15 is placed. And the second
A groove 19 and a cavity are formed in one mold 17 of the molding mold.
20 are formed, and the other die 18 is also provided with the above-described components.
Position of the mold 17 facing the groove 19 and cavity 20
Are provided with grooves 21 and cavities 22, respectively.
You. The fixed contact portion 12a and the cavity 22 are provided in the cavity 22.
And a convex portion 23 having a shape in close contact with 12b are provided.
You.

Using the above-mentioned molding dies 17 and 18, FIG.
The method of molding the case 16 of b) will be described below.

When the molds 17 and 18 are closed, the groove 1
9 and the groove 21 hold the wire 11, and the primary molding portion
Fixing contacts fixed by the fixing ring 14 of the product 15
That the points 12a and 12b are held in proper positions.
Become.

Thereafter, the cavity 20 and the cavity
Inject molten synthetic resin into 22 and mold case 16
I do. By manufacturing in this manner, the round wire 11
Used without waste.

Continuously on the wire 11 thus obtained.
As shown in FIG. 2 c), the case 16 in which the wire 11 is
Cut and cut the wire 11 at the base of the case 16
And bent into a terminal 25 in the opening recess 24 of the case 16.
Movable contact 28, and an operating member 29 and a cover 30 thereon.
And assemble the push button switch.

The tip of the terminal 25 is press-formed.
When the flat portion 26 is provided and adhered to the transport tape 27
To increase the adhesive strength with the transport tape
I have.

Next, FIG. 4 shows a second embodiment of the present invention.
It will be explained based on. In the second embodiment, the wire rod 11 is cut and processed.
It has a cutting part 32 on one side by work and bending
An annular member 31 is formed, and the annular member 31 is
After a certain interval and continuously bonding, the cutting portion 32
The molding is performed while maintaining the interval.

That is, as shown in FIG.
After cutting to a certain length, bending it into a square
Thus, the annular member 31 is formed. And shown in FIG. 4b)
So as to face the side having the cut portion 32 of the annular member 31
The side 34 is continuously spaced from the transport tape 35 by
Glue to Then, the annular tape adhered to the transport tape 35
Between the opposed fixed contact portions 33a and 33b of the member 31
Hold it in the mold while keeping the gap, and mold the case
Then, a layer 36 is formed.

In the case 36 thus formed,
Like the case 16 of the first embodiment, the opening of the case 36 is concave.
The movable contact is accommodated in the portion 37 and the operating member is stored thereon.
Form a pushbutton switch.

[0028]

According to the present invention, one wire is formed in the same mold.
Pressing the fixed contact shape while holding the material and fixing it further
Cut a part of the contact shape to form a pair of opposed fixed contacts
Forming, then injecting synthetic resin into the recess of the mold,
Form a case in which a part of the fixed contact and the terminal are buried.
As a result, the wire is not wasted at all and requires minimal material costs.
Low cost and automatic wire supply
It is easy to fix fixed contacts and terminals during insert molding.
Since positioning can be performed easily and with high accuracy,
It can be formed with high accuracy, and it is low cost and productivity
To provide a method of manufacturing a push button switch which is very excellent
Can be.

[Brief description of the drawings]

FIG. 1 is a sectional view of a push button switch according to an embodiment of the present invention.

FIGS. 2A, 2B, and 2C are manufacturing process diagrams of a first embodiment of a method of manufacturing a push button switch according to the present invention.

FIGS. 3A, 3B, and 3C are cross-sectional views of a mold used in the first embodiment of the present invention.

4A, 4B, and 4C are manufacturing process diagrams of a second embodiment of the method for manufacturing a push button switch according to the present invention.

FIG. 5 is a perspective view showing a conventional push button switch and a method for manufacturing the same.

[Explanation of symbols]

 1, 2 ... first forming die 11 ... wire, 12a, 12b ... fixed contact part 15 ... primary forming part 16 ... case, 17, 18 ... second forming die 25 ... terminal, 26 ... flat part, 31: annular member 33a, 33b: fixed contact portion, 35: transport tape 36: case

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-53-123883 (JP, A) JP-A-63-69115 (JP, A) JP-A-4-56661 (JP, U) 18391 (JP, B2) JP 2-47048 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 11/00

Claims (2)

(57) [Claims] 1. A case in which a continuous wire has an opening recess.
And a pair of fixed contacts in the open recess of the case.
Forming a terminal extending from the fixed contact, and
An elastic movable contact for electrically opening and closing the fixed contacts.
In a method of manufacturing a push button switch for storing a point, (1) a fixed contact shape by holding one wire in the same mold;
Press forming and cutting a part of the fixed contact shape
Te to form a pair of fixed contacts opposed, by injecting synthetic resin into (2) and then the mold in the recess, solid
Form a case in which a part of the fixed contact and the terminal are buried
A method for manufacturing a push button switch, comprising: 2. A case in which a continuous wire has an opening recess.
And a pair of fixed contacts in the open recess of the case.
Forming a terminal extending from the fixed contact, and
An elastic movable contact for electrically opening and closing the fixed contacts.
A method for manufacturing a push button switch for storing a point, comprising: (1) a fixed contact type wherein one wire is sandwiched in a first mold;
Shape and cut a part of the fixed contact shape
To form a pair of fixed contacts opposed, by injecting synthetic resin into (2) and then the mold in the recess, solid
Forming fixed ring with embedded part of constant contact and terminal
After, (3) the fixing ring position is held in the second mold, said
Inject synthetic resin into the mold of Part 2 and part of the fixed contact
And a case in which the terminal is buried.
A method of manufacturing a push button switch.