JP2736589B2 - Contact and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact and a method of manufacturing the same, and more particularly to a contact provided on a surface mount component to be soldered to a conductive pad on a printed circuit board, or a contact which contacts a mating contact of a mating connector. And a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, connectors have been used as conductive contacts used for surface mounting components soldered to conductive pads on a printed circuit board, such as SMT (surface mounting) terminals and connector fork-type contacts. Shaped contacts are incorporated.

[0003] A surface mount component 70 shown in FIG. 6 is mounted on a printed circuit board. This surface mount component 7
Numeral 0 has an insulator 72 and a contact 73 held by the insulator 72. The contact 73 has a terminal portion 74 connected to a conductive pad on the printed circuit board by flow or reflow soldering.

[0004] As a method of manufacturing the contact 73, FIG.
A band-shaped hoop material 75 made of a conductive metal material as shown in FIG. 7A is punched out of a contact member having a predetermined shape in a state of being connected to the carrier C by press punching as shown in FIG. Then, in order to improve the wettability of the solder, as shown in FIG. 7C, the entire surface of the hoop material 75 after the punching is subjected to a plating treatment, and then the contact 73 is cut. That is, the terminal portion 74 has the plating layer M on the entire surface as shown in FIG. Note that the contact 73 cut from the carrier C is incorporated into the insulator 72.

FIG. 9 shows a conventional example of another contact. This conventional contact 80 has a fork-shaped contact portion that comes into contact with a mating contact. That is, also in this contact 80, a hoop material 82 made of a conductive material as shown in FIG. 10A is punched out of the contact member by press punching as shown in FIG. 10B. Then, as shown in FIG. 10 (c), plating is performed from the side that comes into contact with the contact on the other side to the carrier C portion, and then cut for each contact 80 (FIG. 11).
See). These contacts 80 are incorporated into an insulator 72 as shown in FIG. 6 to obtain a connector.

[0006]

By the way, the contact 73 shown in FIG. 6 is sufficient if the terminal portion 74 to be soldered to the conductive pad on the printed circuit board is plated. However, in the manufacturing method of the contact 73, since the entire surface of the contact member including the carrier C punched from the hoop material 75 by press punching is subjected to the plating process, plating is required up to the portion not requiring plating. , Making the production cost expensive. Further, as described above, the plating process must be performed between the press punching and the assembling process into the insulator 72, so that a continuous operation cannot be performed and the manufacturing process becomes complicated as a whole. is there.

Further, even in the method of manufacturing the fork-shaped contact 80 shown in FIG. 9, the same waste and complicated processes as those of the contact 73 shown in FIGS. 6 to 8 have occurred.
Further, in the fork-shaped contact 80, the cut surface of the contact portion 81 which contacts the contact portion of the contact on the other side needs to be smooth. However, this contact portion 81
Is pressed and cut, so even after plating, the cut part must be uneven, the contact area with the contact part on the other side decreases, and the stability of the contact resistance cannot be achieved On the other hand, the insertion / extraction was not smooth, which also contributed to a reduction in the life of the contact portion.

Therefore, an object of the present invention is to reduce the material cost required for fixing a metal layer such as plating, and to simplify the entire process of manufacturing an electronic component. It is to provide a manufacturing method.

Another object of the present invention is to provide a contact and a method of manufacturing the contact that can achieve a longer life without damage to the contact portion of the contact.

[0010]

According to the present invention, there is provided a contact manufacturing method for forming a contact member having a predetermined shape by press-punching a hoop material made of a conductive material. , fixing a metal layer to a predetermined position of the hoop material corresponding to the connection portion of the contact member, the metal layer on the cut surface to be punched during the stamping by punching of the press punching during the pressing step and the same process
The method of manufacturing a contact according to the present invention is characterized in that the metal layer is extended while dragging the metal layer, and the cut surface of the connection portion is covered with the metal layer.

According to the present invention, in a method of manufacturing a contact in which a contact member having a predetermined shape is formed by press-punching a hoop material made of a conductive material, the contact member may be formed in a step prior to the press-punching. A metal layer is fixed to a predetermined position of the hoop material corresponding to the connection portion, and a cut surface of the connection portion is formed at the time of the press punching process, and at the same time, a drawing process is performed by a press at the time of the press punching process. To form
Pressing the same process as the pressing process in the press punching process
Drag the metal layer into the cut surface by punching
Further, a method for manufacturing a contact, characterized in that the contact is extended to the drawn surface, is obtained.

Further, according to the present invention, in a contact formed by press-punching a hoop material made of a conductive material, the contact has a connecting portion for electrically connecting to a mating component, and the connecting portion is formed by the press-punching. the cutting portion is cut by the processing has a stop surface which is formed by subjecting a deep drawing by press during the press punching, the upper
Covers at least one of the front and back surfaces of the connection
A metal layer, and further, the metal layer is formed by the press punching.
Up by punching in the same process as the pressing process during
It is dragged into the cut surface and extended, covering the drawn surface
Contact, characterized in that there are obtained.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 (a), 1 (b) and 1 (c)
1 shows a first embodiment of a contact and a method of manufacturing the contact according to the present invention. The contact 1 has a terminal portion (connection portion) 1a for electrically connecting to a conductive pad formed on a printed circuit board as a mating component. The terminal portion 1a has a drawing surface 13a at a cut portion cut by press punching. Pb is applied to at least one of the front and back surfaces of the terminal portion 1a and the aperture surface 13a.
And a metal layer 13 such as a rolled metal layer or a plated layer having good solderability such as a Sn alloy.

A method for manufacturing the contact 1 will be described below. As shown in FIG. 1A, a metal layer 13 is fixed to one surface of a band-shaped hoop material 10 made of a conductive material. In the longitudinal direction of the hoop material 10, a pair of metal layers 13 are provided in parallel with each other and continuously. The metal layer 13 is applied to a predetermined position of the hoop material 10 so as to correspond to the terminal 1 a of the contact 1. The terminal portion 1a is a portion to be soldered to a conductive pad on the printed circuit board. Then, as shown in FIG. 1B, the shape of the contact 1 is obtained by punching the hoop material 10 by press punching. In the illustrated example, the pair of contacts 1 are connected to the carriers C between the pair of carriers C, and are arranged to face each other. The contact 1 in this state is called a contact member.

When press stamping is performed, FIG.
As shown in FIG.
3 is fixed. When the press punching is performed, as shown in FIG. 1C, the metal layer 13 is extended to the cut surface by the malleability of the metal layer 13, and at the same time, the drawing surface is formed by the drawing at the time of the press punching. 13a are formed. In other words, it is the same as the pressing process during press punching.
The metal layer 13 is cut by a single punching process.
While stretching it so as to cover the diaphragm surface 13a.
ing. After that, the contact 1
Is cut from the carrier C and assembled into an insulator to obtain a connector.

Next, a case where the present invention is applied to a fork-type contact will be described. Also in this case, FIG.
As shown in (1), a metal layer 33 such as a plated layer of gold or silver alloy or a rolled metal layer is fixed to one surface of a hoop material 30 made of a conductive material. After the metal layer 33 is subjected to press punching, the contact portion (connection portion) 3 of the contact 3 is formed.
a. In addition, the contact part 3a is a part which becomes a part which contacts the other party contact. Then, as shown in FIG. 2B, the hoop material 30 is stamped and formed into a predetermined shape of the contact (contact member) 3 by press stamping. In this case, the cut surface of the contact portion 3a, the stop surface of the metal layer 33
33a (see FIGS. 4 and 5) will be formed. In the above description, the metal layer 33 is continuously arranged in a strip shape on the hoop material 30, but in the present invention,
As shown in FIGS. 3A and 3B, a metal layer 33 such as a plating layer or a rolled metal layer may be fixed at a predetermined interval in a spot manner. Then, after press stamping in this manner, the contact (contact member) 3 is cut off from the carrier C and separated. FIG.
The state after cutting from the state of (b) is as shown in FIG. 4 , but in the present invention, as shown in FIG. 5, the contact part 3a that comes into contact with the contact part of the mating contact faces. The part is torsioned so that the top side faces slightly. Then, the contact portion of the contact on the other side can be held by the smooth surface of the metal layer 33 .

[0018]

According to the above-described method for manufacturing a contact of the present invention, a metal layer can be formed only on the terminal portion of a surface mount component such as a connector, and the entirety integrated with the carrier after press punching is formed. The processing cost is greatly reduced as compared with the conventional technology of plating.

Further, since there is no need to perform a plating process after punching from the hoop material, the process can be directly transferred from the pressing process to the assembling process. The time is greatly shortened, and it is possible to contribute to the rationalization of the manufacturing process.

Similarly, when the method of manufacturing a contact is applied to the method of manufacturing a fork-type contact, the cost of the plating process can be reduced, and the press molding and assembling steps can be continued. . Moreover, in the fork-shaped contact portion obtained by the present invention,
Since the part that receives the contact part of the contact on the other side is made up of a smooth part other than the cut surface at the time of press working, it is possible to make the contact parts come into full contact with each other, improving the stability of contact resistance Can be achieved. In addition, since the contact portions are smoothly inserted into and removed from each other, the contact portions are not damaged, and the life can be extended.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory views showing a first embodiment of a method for manufacturing a contact according to the present invention, wherein FIG. 1A is a perspective view showing a hoop material, FIG. 1B is a plan view showing a state after press punching,
(C) is a side sectional view of a contact portion of the contact obtained by the method of the present invention.

FIGS. 2A and 2B are explanatory views showing a second embodiment of the contact manufacturing method of the present invention, wherein FIG. 2A is a perspective view showing a hoop material, and FIG. 2B is a plan view showing a state after press punching. is there.

FIG. 3 is an explanatory view showing another embodiment of the method of manufacturing the contact shown in FIG. 2, wherein (a) is a perspective view showing a hoop material,
(B) is a top view showing the state after press punching.

4A and 4B are explanatory views showing contacts after press punching in the method of manufacturing the contact of FIG. 2, wherein FIG. 4A is a plan view and FIG. 4B is a cross-sectional view taken along line IV-IV in FIG.

FIG. 5 is a sectional view showing a modification of the contact in FIG. 4 (b).

FIG. 6 is a perspective view showing a conventional surface mount component.

7A and 7B are explanatory views showing a method for manufacturing the contact of FIG. 6, wherein FIG. 7A is a perspective view showing a hoop material, FIG. 7B is a plan view showing a state after press punching, and FIG. It is the top view which showed the state which performed the process.

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a plan view showing another example of a conventional method for manufacturing a contact.

10A and 10B are explanatory views showing a method for manufacturing the contact of FIG. 9, wherein FIG. 10A is a perspective view showing a hoop material, FIG. 10B is a plan view showing a state after press punching, and FIG. It is the top view which showed the state which performed the plating process.

FIG. 11 is a sectional view taken along line XX in FIG. 9;

[Explanation of symbols]

 1, 3, 73, 80 Contact 1a, 74 Terminal part (connection part) 3a Contact part (connection part) 10, 30, 75, 82 Hoop material 13 Metal layer 13a Aperture surface 70 Surface mount component 72 Insulator

Claims (3)

(57) [Claims] 1. A contact manufacturing method for forming a contact member having a predetermined shape by press-punching a hoop material made of a conductive material, wherein the step corresponds to a connection portion of the contact member in a step before the press-punching. A metal layer is fixed to a predetermined position of the hoop material, and the cut surface to be punched at the time of the press punching is stretched while dragging the metal layer by punching in the same step as the pressing step at the time of the press punching. A method for manufacturing a contact, wherein the cut surface of the connection part is covered with the metal layer. 2. A method for manufacturing a contact, wherein a contact member having a predetermined shape is formed by press-punching a hoop material made of a conductive material. fixing a metal layer to a predetermined position of the hoop material, the press punching the cut surface of the connecting portion is formed during processing, to form a stop surface simultaneously subjected to deep drawing by press during the press punching, the press Punching
The above process is performed by punching in the same process as the pressing process.
A method for manufacturing a contact , comprising: extending a metal layer on the cut surface while dragging the metal layer on the cut surface . 3. A contact formed by press-punching a hoop material made of a conductive material and having a connection portion for electrically connecting to a mating component, wherein the connection portion is cut by the press-punching process. portions has a stop surface formed by applying a drawing process by the press during the stamping, the front and back surfaces of the connecting section
A metal layer covering at least one side,
In addition, the metal layer is formed by a press
Dragging the cut surface by punching in the same process
A contact that is inserted and extended to cover the drawing surface .