JPH0444392A - Fixing of wire - Google Patents

Abstract

PURPOSE:To connect circuit patterns on both surfaces of a circuit board to each other in the smallest space by a method wherein a wire piece is inserted and fixed in one piece of a hole in the circuit board and the circuit patterns formed on both surfaces of the board are connected with the wire piece. CONSTITUTION:A prescribed amount of a wire 1 is first fed by a standard length feeding device. Then, a movable blade 3 and an insertion needle 10 are made to descend and with the wire 1 pinched by a grasping pawl 10a of the needle 10, the wire 1 is cut between the blade 3 and a fixed blade 2. Subsequently, the needle 10 only pinching the center of a wire piece 1a is made to descend and the piece 1a is inserted in an insertion hole 6a. After that, when the needle 10 is made to ascend and pass through the hole 6a, the piece 1a is fixed in the hole 6a by a spring back. Circuit patterns 8 formed on both surfaces of a circuit board 6 are connected with the piece 1a through a solder 9. In such a way, the piece 1a is fixed in the hole 6a by the spring back. As a result, a dead space for a fixed mechanism, such as a clinch or the like, becomes unnecessary and a high-density packaging becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a wire fixing method for inserting a wire piece into a board and connecting circuits on both sides of the board (prior art). The method will be explained with reference to FIGS. 4 and 5.

Fig. 4 is an enlarged front view of the main part showing the insertion section of the conventional wire insertion device, and Fig. 5 is an enlarged sectional view of the main part of the circuit board showing the state in which circuits on both sides are connected by the conventional wire rod fixing method. It is.

In FIG. 4, the wire rod insertion device includes a fixed length feeding device (not shown) for wire rod 1, a cutting device consisting of a fixed blade 2 and a movable blade 3 provided on an insertion head (not shown), and the above-mentioned cutting device. The two receivers for bending the wire rod piece 1a cut off by the cutting device are formed by bending between a forming device consisting of an umbrella 4 and a forming element 5 sliding on both sides of the umbrella 4, and the metal 4. The pusher 7 holds the wire piece 1a and is inserted into the insertion hole 6a of the circuit board 6. Note that the above-mentioned receiver 4 is retracted during insertion.

The operation of the wire insertion device configured as described above will be explained.

First, a fixed length supply device (not shown) supplies a predetermined amount of wire 1. After the movable blade 3 and the bushing 7 of the insertion head descend and hold down the wire 1, they are separated from the fixed blade 2.

Subsequently, the forming element 5 is lowered, and the receiver is formed into a U-shaped wire rod piece 1a as shown by the two-dot chain line in the figure between the receiver and the gold 4. Next, the insertion head (not shown) is lowered while holding the U-shaped wire rod piece 1a with the metal 4 and bushing 7, and when the wire rod piece 1a shows its tip into the insertion hole 6a, , the metal 4 of the receiver is retracted, and only the pusher 7 is further lowered to completely insert the wire piece 1a into the insertion hole 6a.

FIG. 5 shows the wire piece 1 inserted into the insertion hole 6a of the circuit board 6.
A shows a clinched and fixed state, and the circuit pattern 8 of one circuit board 6 and the wire piece 1a are connected by solder 9.

(Problems to be Solved by the Invention) However, in the above method, it is necessary to provide two insertion holes 6a, and there is a problem in that high-density mounting, miniaturization, and cost reduction are difficult.

The present invention solves the above problems and provides a wire fixing method that can connect circuit patterns on both sides of a circuit board using a minimum space.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a circuit board with one
Drill several insertion holes, push the wire rod piece into the insertion hole using an insertion needle that grips the center of the wire rod piece, and fix it with the springback of the wire rod piece formed in a U shape, or insert the wire rod piece into the insertion hole that grips one end of the wire rod piece. Then, after insertion using a clinch block placed below the insertion hole, both are moved in opposite directions or in the same direction, and the wire piece is formed into an S-shape or a U-shape and fixed.

(Function) With the above configuration, the circuit patterns on both sides of the board can be connected with one insertion hole provided in the board, so high-density packaging, miniaturization, and low cost can be achieved.

(Example) Three examples of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is an enlarged front view of the main parts of the wire rod insertion device used in the first embodiment of the wire fixing method according to the present invention.The difference between this embodiment and the conventional example shown in FIG. 1 for 6
In addition, in place of the bushing 7 in the conventional molding device, an insertion needle 10 having a gripping claw 10a using elasticity at the tip is provided. The rest is the same as the conventional example, so the same components are given the same symbols.
The explanation will be omitted.

A wire rod fixing method using a wire rod insertion device having such a configuration will be explained.

First, a predetermined amount of wire 1 is supplied by a fixed length supply device (not shown). Next, the movable blade 3 and the insertion needle 10 descend, and the gripping claws 10a of the insertion needle 10 grip the wire 1, and at the same time cut the wire 1 between the movable blade 3 and the fixed blade 2. Subsequently, only the insertion needle 10 holding the center of the wire rod piece 1a is lowered, and the wire rod piece 1a is inserted into the insertion hole 6a. After that, the insertion needle 10 rises and comes out of the insertion hole 6a, and the five wire pieces 1a are fixed in the insertion hole 6a by springback. The circuit pattern 8 formed on both sides of the circuit board 6 and the wire piece 1a are connected by solder 9.

According to this embodiment, since the wire rod piece 1a is fixed in the insertion hole 6a by springback, there is no need for a dead space for a fixing mechanism such as a clinch, and high-density mounting is possible.

FIG. 2 is an enlarged sectional view of a main part of a circuit board after wire rods are fixed according to the second embodiment. After the wire rod piece 1a is inserted into the insertion hole 6a, it is moved by an arrow B by a clinch unit (not shown).
, and clinch and fix in the direction of arrow C. Thereafter, connection with the circuit pattern 8 is made using solder 9.

As described above, according to this embodiment, since the clinch unit is used to fix the insertion hole 6a, it is possible to prevent variations in fixation and fixation defects due to the accuracy of the inner diameter of the insertion hole 6a, inclination, etc.

FIG. 3 is an enlarged sectional view of a main part of a circuit board after wire rods are fixed according to the third embodiment. After inserting the wire rod piece 1a into the insertion hole 6a, the inserter 11 and clinch block 12 are operated in the direction of the arrow to form a U-shape, and the wire rod piece 1 is inserted into the insertion hole 6a.
Fix a. Alternatively, one circuit board 6 may be operated in the direction of arrow E.

As described above, according to this embodiment, since the inserter 11 and either the clinch block 12 or the circuit board 6 are moved and fixed, the clinch direction can be determined arbitrarily, and there is no need to consider the adjacency.

(Effects of the Invention) As explained above, according to the present invention, a wire piece can be fixed in one insertion hole of a circuit board and circuits on both sides of the board can be connected, resulting in high-density mounting, miniaturization, and low cost. Cost reduction becomes possible.

[Brief explanation of the drawing]

FIG. 1 is an enlarged front view of the main parts of a wire rod insertion device showing a first embodiment of the wire rod fixing method according to the present invention, and FIG. 2 is an enlarged sectional view of the main parts of a circuit board after wire rods are fixed according to the second embodiment. , 3rd
The figure is an enlarged cross-sectional view of a main part of a circuit board after wire rods are fixed according to a third embodiment of the present invention. FIG. 4 is an enlarged front view of a main part of a conventional wire insertion device, and FIG. 5 is an enlarged sectional view of a main part of a circuit board after fixing a conventional wire. DESCRIPTION OF SYMBOLS 1... Wire rod, 1a... Wire rod piece, 2... Fixed blade, 3... Movable blade, 4... Receiver is gold, 5... Forming element, 6... Circuit board, 6a ...insertion hole, 7.
... Button, 8... Circuit pattern, 9... Solder, 10... Insertion needle, 10a... Gripping claw, 11
...insertor, 12...clinch block Patent applicant Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] (1) A wire fixing method characterized by inserting and fixing a wire piece into one hole of a board and connecting circuits formed on both sides of the board. (2) The wire rod fixing method according to claim (1), wherein the wire rod piece is formed into a substantially U-shape, inserted into the insertion hole, and fixed by springback of the wire rod piece. (3) The wire rod fixing method according to claim (1), wherein after inserting the wire rod piece into the insertion hole, the wire rod piece is clinched and fixed on both sides of the substrate. (4) The wire rod fixing method according to claim (1), wherein after inserting the wire rod piece into the insertion hole, the insertion unit section or the board is moved in an arbitrary direction, formed into a substantially U-shape, and fixed.