JPH05152050A - Manufacture of contact for surface mounting connector - Google Patents

Abstract

PURPOSE:To improve the dimensional accuracy of a contact and enhance the mass production quality thereof by forming a material comprising a brazing material jointed to the terminal section of a contact material, and forming a contact via a punching process or the like. CONSTITUTION:An edge 11 of a contact material 10 of a metal strip sheet having a high conductivity and a spring characteristic, is jointed to the edge 21 of a brazing strip material 20 to be connected to a contact terminal section with pressure rollers 30 and 30'. Then, the contact material 10 and brazing material 20 so jointed are rolled with rollers 40 and 40', thereby providing the sheet material 50 of the predetermined thickness comprising the materials 10 and 20 as metallurgically jointed. This sheet material 50 is punched to form a contact material. According to this construction, a contact manufacturing method to ensure high dimensional accuracy and mass production quality can be provided, different from a case where a brazing material is jointed after forming a contact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for so-called surface mounting technology (SMT), in which electronic parts are fixedly connected to the surface of a wiring board with a brazing material, and in particular, an SM connector.
The present invention relates to a contact manufacturing method suitable for a T connector.

[0002]

2. Description of the Related Art High density wiring boards, that is, high integration and SM
With the development of T-type (surface mounting technology), the demand for SMT and miniaturization of connectors has become more intense.
FIG. 3 shows an example of female contacts among contacts used in some kinds of recent multi-pole connectors for SMT. In FIG. 1, (1) is a tuning fork type contact, and since it is a tuning fork type as a whole, it may be called a tuning fork type contact.
This contact (1) is made by punching from a plate material of a conductive metal having a spring property such as brass, phosphor bronze, beryllium copper and cadmium copper, and has relatively good dimensional accuracy, and
Mass productivity is also good. By the way, the conventional contact height (H) was 5 to 15 mm, and width (W) was about 3 to 8 mm. However, due to recent demands for miniaturization, the height is 3 mm or less and the width is 2 mm. It is extremely small, or less. Although (2) is a brazing filler metal, which depends on the type of SMT technology, low melting point metals and alloys such as solder (SnPb alloy) and silver brazing (Sn.Ag alloy) are used. This contact (1) has its terminal (1
After joining the brazing material (2) to the surface (11 ') of 1), it is attached to a connector body not shown, and the contacts are connected to the pattern of the wiring board by the brazing material (2). The brazing material (2) is joined to the contact (1) after the contact (1) is formed by punching or the like.

[0003]

The step of joining the brazing material (2) to the terminal portion (11) of the contact (1) formed of a metal plate material by punching or the like is performed by the brazing material and the terminal of the contact (1). If the positioning with the portion (11) is not proper, it is impossible to obtain a contact that does not hinder the use. In particular, as the contact (1) is required to be miniaturized and the contact (1) is further miniaturized, the contact area between the contact and the brazing material becomes smaller, so that the workability is reduced, which lowers the productivity and increases the cost. There was a problem to be solved, which was the cause.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method capable of easily mass-producing contacts with a brazing material having a precise shape as planned.

[0005]

The object of the present invention is to provide the following means: [First, the brazing material (2) is bonded to the metal plate material which is the material of the contact (1). Next brazing material (2)
A contact is formed by punching, cutting, or the like from the metal material bonded to. ] It is achieved by.

[0006]

[Function] Since the contact material and the brazing filler metal are metal materials, they can be easily joined by pressure welding or rolling. Also, since the metal of the brazing material and the metal of the contact material are different in color,
The joined state can be easily evaluated visually. Further, since the contact material portion and the brazing material portion are in the integrated plate state, they can be directly punched. Therefore, as compared with the conventional method of joining the brazing material after punching the contact, the positioning accuracy of the brazing material with respect to the contact and the cost reduction can be achieved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method according to the present invention will be specifically described below with reference to the drawings. FIG. 1 shows an embodiment according to the present invention. In FIG. 1, reference numeral (10) is a contact material, which is a strip-shaped metal plate having a large conductivity and a spring property. (2
Reference numeral 0) is a brazing strip material joined to the terminal portion of the contact. First, generally, the strip-shaped metal plate (10) and the brazing strip (20) are wound on reels (not shown) and pulled out from the respective reels, and their end faces (11) (2).
1) Competitors are abutted against each other, and sandwiched between the pressure contact rolls (30, 30 ′) while being pressed, and then sandwiched between the pressure contact rolls (40) (40 ′) and rolled. By this pressure welding and rolling, the strip-shaped metal plate (10) and the brazing strip material (20) are metallically joined and at the same time become a plate material having a predetermined thickness. The plate material (50) thus obtained is generally once wound on a reel (not shown). The plate material produced as described above is formed by a known means such as punching in the direction in which the strip-shaped metal plate (10) part in which the brazing strip material (20) part is rolled toward the contact terminal part becomes a contact,
Formed on the contact. 2A, B, C, D and E are
Rolled strip-shaped metal sheet material forming contacts (10)
It illustrates various aspects of the abutting joint between the portion and the brazing strip (20). In FIG. A, not only the brazing filler metal (2) is abutted and joined but also the terminal portion (11) of the contact (1) is covered so as to enhance the joining strength. B
The illustration shows that the brazing filler metal (2) is in contact contact with the contact terminal (1
1) It covers only one surface, which is advantageous when the terminal portion of the connector (1) is joined in parallel to the wiring board surface. Figures C, D and E show other examples suitable for the case where the terminal portion of the connector (1) is joined in parallel with the surface of the wiring board.

[0008]

According to the present invention, as a method of manufacturing a contact in which a brazing material is joined to the terminal portion, after the contact is formed,
Instead of joining the brazing material to the terminal part, a plate material is formed by joining the brazing material to the terminal part of the contact material, and the contact is made by punching etc. Since it can be manufactured with the same dimensional accuracy and mass productivity as those of the contact, and its workability, yield, and the like are significantly improved, compared with the conventional method, for example, the production cost is about 1/10, It has a remarkable effect that it can be produced at low cost.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a step of joining a metal material and a brazing material according to the present invention.

FIG. 2 is a view showing various forms of joining of a metal material and a brazing material in the method of the present invention.

FIG. 3 shows an example of a contact of a surface mounting connector.

[Explanation of symbols]

 (1) Contact (11) Terminal part (11 ') Surface of terminal part (2) Brazing material (10) Strip metal material (20) Brazing strip material (30) (30') Pressure welding roll (40) (40 ') Rolling roll (50) Plate material

Claims (3)

[Claims] 1. A step of joining a strip-shaped metal plate material to be a contact and a strip material to be a brazing material to a portion to be a terminal of the contact, and a plate material obtained by joining the brazing strip material to the strip-shaped metal plate material. A method for manufacturing a contact for a surface-mounting connector, wherein each material joint is formed so as to serve as a terminal of the contact. 2. A contact for a surface-mounting connector according to claim 1, wherein the step of joining a strip-shaped metal plate material to be a contact and a strip material to be a terminal of the contact is pressure welding. Production method. 3. The surface mounting according to claim 1, wherein the step of joining a strip-shaped metal plate material to be a contact and a strip material to be a terminal of the contact includes a pressing means and a rolling means. Connector contact manufacturing method.