JPS6042599B2 - Manufacturing method of multi-terminal connector for electronic device circuits - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a multi-terminal connector used in electronic circuits such as computers and communication equipment.

This type of multi-terminal connector consists of terminals made of a large number of metal conductors arranged at predetermined intervals, and a band-shaped plastic support for supporting and insulating each terminal at a predetermined interval. One end is connected to a circuit such as a printed circuit board of an electronic device, and the other end of each terminal is connected to a board of another circuit or a cable for connecting to another circuit, and electricity is transmitted through this multi-terminal connector. It is a device that conducts electricity.

The conventional manufacturing method for manufacturing this multi-terminal connector uses a thin strip-shaped metal plate 1 as shown in FIG. 3
Rectangular punch holes 11 having a length corresponding to the length of the conductor 3 and the terminals 8 above and below the conductor 3 and the terminals 8 are arranged in a row in the lateral direction at intervals equal to the widths of the conductor 3 and the terminals 8 by a punching process such as pressing. ,
Thereby, plastic sheets 5, 5 are superimposed on both the front and back surfaces of three rows of conductors formed at predetermined intervals, and these are welded by heating and pressurizing them in a mold (see FIG. 1C).

Next, cut off the upper and lower side edges 10, 10, and
As shown in Fig. 1, a large number of terminals 8, 8 arranged protruding from the top and bottom of the plastic sheet 5 are to be formed, but due to the nature of the plastic sheet 5, it shrinks when cooled after being heated, As shown in D,
The upper and lower terminals 8, 8 are bent in the direction of contraction. As a result, the multi-terminal connector after cutting off the upper and lower side edges 10, 10 is as shown in FIG.
The spacing between the terminals 8, 8 becomes incorrect, and it is no longer possible to maintain the terminals 8, 8 at a predetermined spacing as shown in Figure 1G. Seven times it has become impossible to connect to the circuit. Furthermore, during molding to weld the plastic sheets 5, 5, burrs peculiar to plastics are generated, but each terminal 8,
Although the burrs formed on the terminals 8 can be easily removed, the burrs 9 formed between the terminals 8 are difficult to remove. In order to eliminate the drawbacks of the conventional manufacturing method as described above, the present invention has been developed so that upper and lower terminals arranged at a predetermined interval on a plastic sheet can maintain an orderly and predetermined interval even after manufacturing. The object of the present invention is to provide a method for manufacturing a multi-terminal connector that facilitates connection to circuits of other electronic devices, and that can be manufactured easily and inexpensively. Further, the present invention will be explained in detail with reference to the embodiment shown in FIG. First, as shown in FIG. 2A, a thin strip-shaped metal plate 1 is prepared as a conductor plate, and in the first step, the strip-shaped metal plate 1 is
Rectangular punched holes 4 having a length approximately equal to the length of the conductor 3 in the lateral direction at the center thereof are punched out in a row using a press or the like at intervals equal to the width of the conductor 3 (see Figure 1B).
.

As a result, terminal forming portions 2 are formed on the top and bottom of the band-shaped metal plate 1.
2 remains, and these upper and lower terminal forming parts 2
, 2, a large number of conductors 3 are arranged at predetermined intervals.

In the next second step, strip-shaped plastic sheets 5 and 5 are superimposed on both the front and back sides of the three rows of conductors of the strip-shaped metal plate 1 (see Figure 1C), and these are stacked as shown in Figures 1D and E. By applying heat and pressure using the upper and lower molds 6, 6, welding is performed in a saw-like manner.

As the material for the plastic sheet, thermosetting resins such as polyimide, polycarbonate, epoxy, and phenol resins, and thermoplastic resins such as vinyl chloride and fluorine resins are appropriately selected and used.

Further, it is preferable to use a copolymer resin of tetrafluoroethylene and fluoroalkyl fluorovinyl ether (hereinafter referred to as PFA), which is a fluororesin having particularly excellent insulation properties and heat resistance. Also, the width of the plastic sheet 5 is
It is preferable that the length be slightly smaller than the length of the rectangular punched hole 4. In the second step of applying the plastic sheet, plastic burrs may occur on the band-shaped metal plate 1.
Further, as the plastic sheet 5 is cooled after being heated and formed, the center portion where the conductor 3 is located is slightly deformed due to shrinkage, but the next step is carried out as is.

In the next third step, as shown in FIG.
In the upper and lower terminal forming parts 2, 2, cut out parts 7 shown with diagonal lines are set so as to leave the terminals 8 on the upper and lower extension lines of each conductor 3, and each of the cut out parts 7 is used as a brace, etc. By punching out and notching, the multi-terminal connector shown in FIGS. 2G and 2H is manufactured.

Of course, any plastic burrs remaining on the terminal 8 of the product should be removed. In addition, in the third step of cutting out the notches 7, if the horizontal positioning of each notch 7 with respect to the strip metal plate 1 is incorrect, the position of each terminal 8 will be misaligned with the conductor 3 to be connected thereto. To prevent this, the width of each conductor 3 should be made larger than the width of the terminal, for example, about twice as wide.

According to the manufacturing method of this invention, a strip metal 1 which is a conductive plate
Due to the shrinkage of the plastic sheet 5 welded to both the front and back surfaces of the three rows of conductors in the center, each conductor 3, 3 is slightly deformed, but after the deformation, notches 7 are formed in the upper and lower terminal forming parts 2, 2. Since each terminal 8 is formed by punching out with a press or the like, there is no risk of each terminal 8 being bent, unlike in conventional manufacturing methods, and it is possible to form a large number of terminals 8 orderly arranged at predetermined intervals. Not only is a multi-terminal connector having this structure manufactured, but also, among the plastic burrs generated on the strip metal plate 1 due to the welding of the plastic sheets 5, 5, the burrs attached between the terminals 8, 8 are removed. 9 is removed together with the notch 7 when the notch 7 is punched out, leaving only the burrs attached to the terminals 8, 8. Since it can be easily removed, it is easy to manufacture and can be manufactured at low cost.

Example thickness: 0.3TWL, width: 2077! F7! A strip-shaped metal plate 17 made of Norin bronze is used, and the width in the horizontal direction of the central part is 21mm. By punching out rectangular punched holes 4 with a length of 5TI0fL using a press and arranging them in a row, a width of 0.8? After forming the conductor 3 with a length of 5TWL,
PFA sheets 5, 5 with a width of 4Tw1 (7) are overlaid on both the front and back surfaces of the three rows of conductors, sandwiched between the molds 6, 6, and heated at a pressure of 3k9f/Cfl degree at 340°C for 1 minute. After pressure heating, the welding was completed by cooling.

Next, cutout portions 7 located above and below each rectangular punched hole 4 are cut out from the terminal forming portion 2 using a press or the like to form terminals 8 connected to the top and bottom of each conductor 3. After removing burrs, the width is 5wL (7) and the thickness is 0.3W07 on the top and bottom of the PFA sheet plastic support!
A multi-terminal connector in which a large number of terminals measuring 0.4 wm and 7.5 T0n in length were arranged in an orderly manner at predetermined intervals was obtained.

[Brief explanation of drawings]

A to F in FIG. 1 show the manufacturing process of a conventional multi-terminal connector, and G shows a multi-terminal connector in which each terminal is accurately spaced. FIGS. 2A to 2H show the manufacturing process of the multi-terminal connector of the present invention. Code in the drawing, 1...
Thin band-shaped metal plate as a conductor plate, 2... terminal forming part, 3... conductor, 4... rectangular punched hole, 5
...Band-shaped plastic sheet, 6...
Upper and lower molds, 7... Notches, 8... Upper and lower terminals, 9... Plastic burrs.

Claims (1)

[Claims] 1. In the thin strip-shaped metal plate 1, rectangular punched holes 4 having a length approximately equal to the length of the conductor 3 are punched in a row in the horizontal direction in the central portion thereof using a press or the like at intervals of the width of the conductor 3. On both the front and back surfaces of the three rows of conductors of the strip-shaped metal plate 1, strip-shaped plastic sheets 5, 5 are superimposed and welded by heating and pressurizing with molds 6, 6, and the upper and lower parts of the strip-shaped metal plate 1 are bonded. In the terminal forming portions 2, 2, cut out portions 7 are formed so as to leave terminals 8 on the upper and lower extension lines of each conductor 3.
A method for producing a multi-terminal connector for an electronic device circuit, characterized in that the notches 7 are punched out using a press or the like.