JPH09312191A - Manufacture of terminals - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economic manufacturing method of a terminal capable of manufacturing a pair of symmetrical terminals by means of a metal die. SOLUTION: A formation pore 17 of terminal main bodies 3a and 4a is centered, and elements 23 and 24 with the same widths are fed in two ways so that these elements are narrowed each other on a reverse direction. And, either one of two contact spring formation pores 18 and 19 is employed for punching and the formation pore 17 of the terminal main body is shared, whereby external connector terminals 3 and 4 for the right and left are formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positive temperature coefficient thermistor device (hereinafter, referred to as P
(Hereinafter referred to as TC starter).

[0002]

2. Description of the Related Art Conventionally, when starting a compressor mounted in, for example, a refrigerator or an air conditioner, a positive characteristic thermistor is used as an auxiliary winding among a main winding and an auxiliary winding having a motor for driving the compressor therein. There is known a PTC starter which is inserted in series with the above and is supplied with a primary large current in the auxiliary winding to obtain a starting torque for starting.

A PTC starter of this type is disclosed in Japanese Utility Model Publication No. 58-34722, and its equivalent is shown in FIGS. 4 to 6. That is, the PTC starter 1 having the appearance as shown in FIG. 5 when viewed from the front side and as shown in FIG. 6 when viewed from the side is a case 2 formed of an insulating material such as unsaturated polyester resin, Two left and right external connection terminals 3 and 4 attached to the case 2 so as to penetrate the inside and outside of the external connection terminal 2;
4 and the contact springs 3b and 4b, which are respectively provided in the case 2 so as to face each other in the case 2, and the contact springs 3
b, 4b, and a cylindrical positive temperature coefficient thermistor element 6 elastically held by curved contact portions formed at both ends.

In the manufacture of the external connection terminals 3 and 4, conventionally, as shown in FIG. 3, a hole 8 in which the contact spring 3b is expanded and a terminal body 3a of the external connection terminal 3 are expanded. A mold 11 having a punching hole 10 integrally formed with a hole 9 is used, and the mold 11 is used to form a terminal-forming piece 10A of that shape by a metal, for example, a stainless steel plate material 12
Punching it out in one piece, and then punching the punched piece into a shape of b and a shape of c, the necessary bending work is automatically performed by the processing machine in the order of steps, and finally d shown at the right end of the figure. The terminal main body 3a and the contact spring 3b having a predetermined shape as described above are formed, and the right external connection terminal 3 integrated with the contact spring 3b is manufactured by the right dedicated mold 11. Similarly, the external connection terminal 4 for the left is also a dedicated die 14 for the left having a punching hole 13 having a shape opposite to the punching hole 10 of the above-mentioned right die 11, and a terminal forming piece is punched out from the metal plate material 15 for the left. Similarly, the element is processed to manufacture the right external connection terminal 4 in which the terminal body 4a and the contact spring 4b are integrated.

For convenience of explanation, FIG. 3 shows a state in which the external connection terminals 3 and 4 integrated with the contact springs 3b and 4b are continuously manufactured by a progressive die, and at the same time, the manufacturing thereof will be described. The mold requires both an upper mold and a lower mold, but only the lower mold is shown here.

[0006]

However, since the external connection terminals 3 and 4 of the PTC starter 1 sandwich the positive temperature coefficient thermistor element 6, two symmetrical external connection terminals 3 and 4 are required. Therefore, the external connection terminals 3 and 4 are connected to the terminal spring 3
b, 4b, molds 13 and 1 for integrally molding both
4 is a mold 1 for integrally molding two terminals for the right and one for the left.
Requires 3,14. Thus, conventionally, two types of molds 13,
14 was used, and the production was carried out in separate production lines, and the overall production cost including the die cost was high and uneconomical.

The present invention has been made in view of the above circumstances, and it is possible to manufacture both the right terminal and the left terminal with a single mold, thereby reducing the manufacturing cost and mass-producing with a space-saving manufacturing facility. It is an object of the present invention to provide a method of manufacturing a terminal capable of achieving the above.

[0008]

According to a first aspect of the present invention, there is provided a method for manufacturing a terminal, wherein the terminals are incorporated in a case made of an insulating material so as to face each other, and the terminals are attached to a terminal main body and a base portion thereof. Two external connection terminals of the same shape, which are formed of spring contacts facing each other in the case, are punched out in a shape in which the terminal body is expanded, and the spring contacts are symmetrically expanded on both sides thereof. Using a die in which a punched hole is formed and a metal plate material for forming a terminal that is narrower by a predetermined dimension than the width of the die, bring the metal plate material to the die on opposite sides in the width direction. By selectively performing such two kinds of insertion, the punching hole of the terminal body is shared, and the punching hole of either one of the spring contacts is used to form a unitary piece of the contact spring and the terminal body. Punching, punching And the bending process the strip into required shape,
The left and right external connection terminals are manufactured.

A method of manufacturing a terminal according to the second aspect of the invention is
Externals of two identical bodies, which are assembled in a case made of an insulator so as to oppose each other, each of which consists of a terminal body protruding from the end surface of the case and a spring contact attached to the base of the terminal body and facing each other in the case. For the connection terminal, a die having a punched hole in which the terminal body is expanded and punched holes in which the spring contacts are symmetrically expanded on both sides thereof are formed, and for forming a terminal having the same width as the mold. Using the metal plate material, the metal plate material is punched out from the metal plate material with two contact springs integrally provided on the left and right sides of the terminal body, and the punched element pieces are required for the two contact springs including the terminal body. After the bending process of the above-mentioned shape, the unnecessary contact spring is cut off to manufacture the left and right external connection terminals.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

The pair of left and right external connection terminals 3 and 4 to be inserted into the PTC starter 1 have contact springs 3b and 4b on one of the terminal bodies 3a and 4a, respectively, but both have a symmetrical shape. It is a thing.

Therefore, as shown in FIG. 1, as a mold for integral molding, a terminal main body forming hole 17 having a developed shape of the terminal main bodies 3a, 4a is provided in the central portion, and contact springs 3b are provided on both sides thereof. A die 21 having a punching hole 20 in which the contact spring forming holes 18 and 19 of the expanded shape of 4b are symmetrically provided is used. The size of the mold 21 is larger than that of the conventional molds 13 and 14 shown in FIG. 3 by a width D of the mold corresponding to the addition of one contact spring 3b or contact spring 4b. Wider than the width d of 14 (D> d)
It is something that has become.

Next, a method of manufacturing the external connection terminals 3 and 4 using this mold 21 will be described. For example, in the case of the right external connection terminal 3, the conventional external connection terminal 3 was passed through. A metal plate material 23 having the same width as that used at the time is used. One side of this material 23 is removed in the width direction of the mold as shown in the broken line diagram so as to be removed from the hole 19 for forming the left contact spring for the left side. It is inserted as (upward), held at this position, the material is fed, and punching is performed.

As a result, in the blank 23 of the punching hole 20 of the die 21, the material body 23 has the terminal body forming hole 17 and the upper contact spring forming hole 18 involved in the punching, and the right outer expanded portion. The element 20A of the connecting terminal is punched out.
After that, the punched piece 20A is automatically b
B-shaped, c-shaped, and d-shaped bending processes are performed in an operational manner to complete the right external connection terminal 3.

On the other hand, when the left external connection terminal 4 is manufactured using the mold 21, the left metal plate material 24 having the same width as the above-mentioned right metal plate material is made into a solid line diagram. As shown in the drawing, the material 23 for the right is moved to the lower side on the side opposite to the position shown by the broken line, and is determined so as to come off from the hole 18 for forming the contact spring for the right, which exists above the metal. Insert into mold 21.

Then, the material is fed while being held at this position, and punching is performed. As a result, this time, the right material 24 is unrolled for the left side because the forming hole 17 of the terminal main body 4a and the forming hole 19 of the lower contact spring 4b out of the punching holes 20 of the die are involved in the punching. The element 20B of the external connection terminal is punched out. After that, the punched piece 20
B is automatically bent in the same manner as in the prior art, and the work is performed in an automated manner to complete the right external connection terminal 4.

As described above, the contact spring forming hole 18 is symmetrically formed about the center terminal forming hole 17 of the terminal body.
A single die 21 having a punched hole 20 in which 19 are connected is used, and metal plate materials 23 and 24 having the same width are always provided in the die 21 for forming one of the contact springs 18 The holes 23 for forming the terminal main body are formed by inserting the materials 23, 24 into the terminals 19, so that the materials 23, 24 are positioned and inserted.
, The external connection terminal 3 for the right and the external connection terminal 4 for the left can be manufactured at will by using one mold 21.

Therefore, unlike the conventional mold for manufacturing the right external connecting terminal and the mold for manufacturing the left external connecting terminal, it is not necessary to use two molds. Since only one mold is required, the cost of the mold and the like can be reduced and the manufacturing cost can be reduced. In addition, since the same material (material) can be used in a single production line, there is no need to prepare or store two types of dedicated materials, one for the right terminal material and the other for the left terminal material. In addition to being able to omit it, the line control can be easily performed, and an economical manufacturing facility can be provided.

FIG. 2 shows a method of manufacturing a terminal according to another embodiment. In the above-described first embodiment, a material having the same width as that of the material fed into the conventional die is inserted in different positions in the width direction of the die in opposite directions, and one contact spring is provided. The right and left external connection terminals are manufactured, but the manufacturing method according to the present invention uses a material having a width substantially the same as the width of the mold, and this material is the same as that of the first embodiment. It is sent to the mold of the structure and punched.

That is, as in the first embodiment, the die is integrally formed with a hitting hole 20 composed of a hole 17 for forming the terminal body and holes 18 and 19 for forming contact springs symmetrically provided on the left and right sides thereof. A metal plate material 26 having a width E substantially equal to the width D of the mold is used as the material for forming one terminal.
Is used to insert the metal plate material 26 into the mold 21 from the left side and sequentially feed it to the right side.

Then, from the metal plate member 26, the terminal forming element 30 having the same shape as the punching hole 20 in which the two contact springs 27, 28 are integrally attached to the left and right of the terminal body 29 from the beginning is punched. And this punching piece 30
Not only the terminal body 29 but also the left and right two contact springs 27, 28 are simultaneously bent into the shape of b and the shape of c, and the necessary bending process is automatically performed by the processing machine. To do it.

As a result, finally, d shown at the right end of FIG.
, The contact springs 27 are bent on both sides,
External connection terminals 31 each having 28 are made. Then, after this, of the two contact springs 27, 28 of the external connection terminal 31, the unnecessary one of the contact springs 27 or 28 is cut off at the position indicated by the chain line X.

That is, when the right external connection terminal 3 is obtained, the lower contact spring 28 is cut, and when the left external connection terminal 4 is obtained, the upper contact spring 28 is cut. If post-processing for cutting 27 is performed,
Right external connection terminal 3 with two contact springs 27 integrated
Then, similarly, the left external connection terminal 4 in which one contact spring 28 is integrally attached to the terminal body 29 can be optionally manufactured.

In this way, by using the same mold as that of the first embodiment and sending only the material having the same width as the mold,
Originally, one contact spring is not required
You can easily manufacture the right terminal and the left terminal by making an unfinished temporary external connection terminal with one contact spring and cutting off the unnecessary contact spring at the end. Therefore, this manufacturing method also has the effect of reducing the number of molds, and the material cost can be reduced and material management can be facilitated by using a material of a fixed size according to the width of the mold, and simple line control can be achieved. The same effect as the first embodiment can be expected.

[0025]

As described above, the external connection terminal integrally having the pair of left and right spring contacts incorporated in the case is used for molding the external connection terminal even though both terminals have the same shape in the past. Although it was uneconomical to use two molds, one for the right mold and one for the left mold, according to the present invention, a molding metal mold having two spring contact forming holes symmetrically around the forming hole of the terminal body from the beginning. One mold is used, and of the two spring contact forming holes of this mold, the metal plate for terminal molding is connected to the spring contact forming hole which is necessary for the right terminal and the left terminal. By performing the two types of insertion in which the plates are positioned opposite to each other in the width direction of the mold, the forming hole of the terminal body is shared, and the right terminal and the left terminal can be optionally manufactured.

Therefore, since the number of molds is reduced and only one manufacturing line is required, and the line control is easy and the reliability is improved, the manufacturing and equipment costs are reduced, and the terminal manufacturing method can be mass-produced at low cost. , Its economic value will increase.

According to the second aspect of the present invention, a mold having the same structure as that of the above-mentioned invention is used, and this time, a metal plate for forming a terminal having the same width as that of the mold is fed, and two right and left sides are simultaneously formed. By molding a terminal that has a contact spring from the beginning, performing the necessary bending process afterwards with the same effect as the two contact springs, and cutting off the unnecessary one of the last two contact springs. Since the terminal for the left and the terminal for the left are manufactured, in this case as well, only one mold is required, which reduces the manufacturing cost and makes it easy to secure the material with the same fixed size as the width of the mold. It is possible to obtain the effect of lowering the cost and expecting to save labor such as material management.

[Brief description of drawings]

FIG. 1 is a manufacturing explanatory view illustrating a manner of manufacturing a terminal according to a first manufacturing method of the present invention in step order.

FIG. 2 is a manufacturing explanatory view illustrating the manner of manufacturing a terminal according to the second manufacturing method of the present invention in the order of steps.

FIG. 3 is a manufacturing explanatory diagram illustrating the manner of manufacturing a terminal by a conventional manufacturing method in the order of steps.

FIG. 4 is a structural view showing a cross section of a main part of a PTC starter into which a pair of terminals are inserted.

FIG. 5 is an external view of the PTC starter viewed from the front direction.

FIG. 6 is an external view of the PTC starter viewed from a side surface direction.

[Explanation of symbols]

 1 PTC Starter 3 External Connection Terminal for Right 4 External Connection Terminal for Left 3a, 4a Terminal Body 3b, 4b Spring Contact 17 Terminal Body Forming Hole 18, 19 Spring Contact Forming Hole 20 Punching Hole 21 Mold 23, 24, 26 Metal Plate material

Claims (2)

[Claims] 1. A terminal body, which is assembled in a case made of an insulator so as to oppose each other, each of which is composed of a terminal main body protruding from an end surface of the case and a spring contact attached to the base of the terminal main body and facing each other in the case. The external connection terminal of the same shape of
A die having a punched hole in which the terminal body is expanded and punched holes in which the spring contacts are symmetrically expanded on both sides thereof are formed, and for forming a terminal narrower than the width of the mold by a predetermined dimension. Of the metal plate material, and the metal plate material is selectively inserted into the mold in two ways such that the metal plate material is moved to the opposite sides in the width direction, so that the punching hole of the terminal body is shared and Due to the punching hole of one of the spring contacts, the contact spring and the terminal body are punched out as an integral piece, and the punched piece is bent into the required shape for left and right external connection. A method of manufacturing a terminal, wherein the terminal is manufactured. 2. A terminal body, which is incorporated in a case made of an insulator so as to face each other, each of which is composed of a terminal main body projecting from an end surface of the case, and two spring contacts attached to the base of the terminal main body and facing each other in the case. The external connection terminal of the same shape of
A die having a punched hole in which the terminal body is expanded and punched holes in which the spring contacts are symmetrically expanded on both sides thereof are formed, and a metal plate material for forming a terminal having the same width as the mold. Using the mold, two contact springs are integrally punched from the metal plate material on the left and right sides of the terminal main body, and the punched element is bent into a desired shape for both the two contact springs including the terminal main body. After the processing, the unnecessary contact spring is cut off to manufacture the left and right external connection terminals.