JPH07201447A - Manufacture of pin for plug of electronic equipment - Google Patents

Abstract

PURPOSE: To automatically manufacture plug pins of higher quality at smaller cost, by arranging oriented pins parallel in holding tools lining a belt. CONSTITUTION: A sheet of metal is pressed into a holding tool 4 used for holding a terminal pin 3 thereon. The tool 4 has two side plates 41 bent so as to face each other in the longitudinal direction of the pin 3, and the plates 41 are formed with a locking groove 42. Those two grooves 42 facing each other serve to securely hold one terminal pin 3. The parallel arrangement of the pins 3 oriented in the tools 4 lining a belt securely regularly makes the tip and rear end separately fix. That permits the pins 3 to be selectively plating, typically, the pins 3 still in the tools 4 to be plated with gold and then washed at their tip part 31 and plated with silver at the wire-connected parts at rear end part 32 to reduce cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a plug pin for electronic equipment.

[0002]

2. Description of the Related Art As shown in FIG. 1, a plug 1 used in a general computer keyboard, mouse or the like has a fixing ring 2 attached to its tip and a pin terminal 3 attached to the ring 2. . Since the tip of the terminal 3 must be inserted into a corresponding socket of a computer or the like, and the rear end is welded to a conductive wire, the terminal 3 becomes a general plug after the manufacturing process and further plating process. In addition, the standardized standardized size of the tip of the terminal 3 is a minimum of 0.6 mm, which cannot be changed arbitrarily, and it is quite difficult to connect a conductor to the end of the wire diameter of 0.6 mm, and the work efficiency is low. .
FIG. 2 shows the terminals 3A made one by one by lathe processing so that they can be effectively fitted into the fixing ring 2 (see FIG.
It is necessary to provide one conical portion 3A1 with the maximum diameter, and its reference diameter is 1.25 mm. Comparing the terminal 3A made by this method with the one made by the present invention, there are the following drawbacks.

(1) Cost is too high Since these terminals are made one by one, when plating them, it is necessary to gold-plat the entire insertion terminals , and only the tip is selected as in the present invention. Since it cannot be gold plated, the cost is extremely high. In the lathe processing, the loss of the cutting waste of the material always occurs, and the cost becomes high. (2) Poor effect The cutting streaks are formed on the surface of the lathe-machined pin, and the gap at the interface of the insertion contact becomes large, and therefore the electric resistance also becomes large. As shown in FIG. 3, since the insulation distance (d) between the maximum conical portions (3A1) of two adjacent terminals 3A is too short (compared with the present invention), the interference of electromagnetic field (projection wave, miscellaneous signal). , The output attenuation of the transmission signal, etc.) becomes severe. The precision tolerance is ± 0.03 mm. (3) Since these terminals are made one by one, the production process cannot be mass-produced and automated.

In the prior art shown in FIG. 4, the terminal 3B
Are manufactured by press working from a plate material, and are connected in parallel with the plate material at the rear end one by one, and are pressed. The terminal 3B itself has a structure that is rolled into a hollow by press working, and its manufacturing method also has the following drawbacks. (1) Short life The insertion end of the tip of the pin has a hollow structure, so the strength is extremely weak, and if the insertion is inaccurate, too strong, or is inserted at an angle, it always breaks. Since the insertion end is bent into a circular shape by press working, the roundness is poor, friction at the time of insertion becomes large, and the life is shortened. (2) Poor effect Due to poor roundness, poor welding results in high electrical resistance. The allowable range of accuracy is ± 0.03mm.

[0005]

The quality of connection terminals used for connection jacks of general computer keyboards and mice directly affects the quality of execution of output signals. Therefore, there is a need for high quality and low cost. There is a demand for manufacturing and development of terminals that can satisfy the above requirements. However, one of the prior art pin manufacturing methods is by lathe processing, and the other is directly pressed and wound.
The main drawbacks are the too high cost and poor quality as mentioned above. The main object of the present invention is to provide a pin manufacturing method that can reduce costs, improve quality, and still be automated.

[0006]

The above-described object is to press a wire rod so that its tip (the side to be inserted into a socket) is conical and its rear end (the side to which the wire is connected) is thin. To form a shape that is easy to connect to, and a shape suitable for retaining in the area adjacent to the rear end, and align the pins obtained in the above step with the holder that is provided in series on the belt. And attaching them in parallel to each other, attaching the pins to the holders, and gold-plating the tip ends of the pins to wash them, and then attaching the pins to the holders, and attaching the wire connection part at the rear end. This can be achieved by a method of manufacturing a pin for a plug of an electronic device, which comprises a step of applying tin plating to a metal and a step of removing the pin from the holder and cleaning the pin.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 5, a terminal (3) is pressed from a round rod wire having a diameter of 0.6 mm, and its tip (the side to be inserted into a socket) has an insertion end. As part (31), mold the part that does not change the wire diameter and the conical part at the tip, and then the rear end (the side where the wire is connected)
(32) is a thin-walled shape that is easy to connect to a wire (for example, U-shape, semi-circle, V-shape, etc.), and the area adjacent to the rear end is pressed into a shape suitable for retaining, and the U-shape By using the groove, the wire can be easily connected and welded. On the other hand, in order to hold the pin, the holder (4) is pressed from a thin plate material, and the holder (4) is formed by bending two side plates (41) facing each other in the length direction of the pin. Locking grooves (42) are formed in the side plates (41), respectively. Two
One terminal (3) can be fixed by using two facing locking grooves (41), (41).

The holder (4) is provided in series on the belt, and the pin (3) is attached to the holder parallel to each other with the orientation.
(See FIG. 6) Obviously, the terminals (3) are regularly divided and fixed at the front end and the rear end, so that the plating can be selectively performed. That is, with the pin (3) attached to the holder (4), the tip end (31) of the pin can be gold-plated and washed. The wire connection at the rear end (32) of the pin can then be tinned with the pin (3) still attached to the retainer (4). Therefore, the front end (31) can be gold-plated with good conductivity, and the rear end (32) can be tin-plated with good welding effect.

In the embodiment shown in FIG. 7, a modification (32 ') of the rear end portion is shown, and this rear end portion (32') has a hole (32 ').
It has 1 ') and is pressed flat so that it can be easily welded to the wire as well. The pin is also provided with a conical surface (33) of maximum diameter, which acts as a lock when the terminal (3) is mounted in the retaining ring (2) and minimizes the insulation distance (d ) Is held larger than in the structure of FIG. 3 (prior art), thus making magnetic field interference less likely to occur. FIG. 8 shows an example in which the present invention is applied to a plug-in plug of a computer keyboard.

[0010]

【The invention's effect】

(1) Reduction of cost In the present invention, gold plating can be selectively applied only to the tip end portion of the pin and inexpensive tin plating can be applied to the rear end portion thereof, so that the cost of plating is halved. The cost of the wire and plate used for manufacturing the terminal (3) and the holder (4) is considerably low. (2) Long life and good effect. Generally, wire rods and plates are manufactured by drawing, so that they have good roundness, high strength, smooth contact surface, and low friction, and thus have relatively low electric resistance. With the current wire rod manufacturing technology, the tolerance of the diameter can be controlled to ± 0.01 mm. As shown in FIG. 7, since the minimum insulation distance (d) between the terminals (3) in the fixing ring (2) is kept longer than that of the conventional one, the insulation is improved. (3) Since the pin is held on the belt, it is convenient for manufacturing the terminal (3) and welding after attaching it to the fixing ring (2).

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a conventional insertion plug and a fixing ring.

FIG. 2 is a plan view of a conventional lathe-made terminal.

FIG. 3 is a partial cross-sectional view showing an adjacency relationship when a terminal made by a conventional lathe is attached to a fixing ring.

FIG. 4A is a plan view of a conventional terminal pressed from a plate material. B is a top view of the conventional terminal pressed from another board material. C and D are sectional views of the terminal of B.

FIG. 5 is a perspective view showing an example of a terminal made according to the present invention.

FIG. 6A is a plan view showing a holding state of a terminal made according to the present invention. B is a side view of A. C is the figure which looked at A from the bottom. D is a sectional view of A.

FIG. 7 is a partial cross-sectional view showing a state in which a terminal made according to the present invention is mounted in a fixing ring.

FIG. 8 is a perspective view of a plug using a terminal made according to the present invention.

[Explanation of symbols]

 1 ... Insertion plug 2 ... Fixing ring 3 ... Terminal (pin) 4 ... Retainer 31 ... Pin tip (insertion end) 32, 32 '・ ・ Pin rear end 41 ・ ・ ・ Side plate 42 ・ ・ ・ ・ ・ Locking groove 321' ・ ・ ・ ・ Hole

Claims (1)

[Claims] 1. A wire rod is pressed, and its tip (31) is pressed.
Conical shape (side to be inserted into socket) and rear end (3
2) A pin manufacturing process that forms a thin shape (the side to which the wire is connected) that is easy to connect to the wire, and a shape suitable for retaining in the area adjacent to the rear end. The pins (3) obtained in the above step are attached to the holding tool (4) so that they are oriented in parallel with each other, and the tip of the pin (3) is attached to the holding tool (4).
1) gold-plating and washing, and then attach the pin to the holder, and rear end (3
A method for manufacturing a pin for a plug of an electronic device, which comprises a step of applying a tin plating to the wire connection portion of 2) and a step of removing the pin from the holder and cleaning the pin.