JPH0626154B2 - Method of forming connection between circuit molded part and lead wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relays a lead wire of a round electric wire and a flat electric wire by using circuit molding parts for internal wiring for consumer use, industrial use and automobiles. The present invention relates to a method for forming a connecting portion between a circuit molded part and a lead wire in the method.

[Conventional technology]

The relay connection between the flat wire that uses a rectangular conductor as the conductor and the lead wire is as follows: (1) Solder them together via the printed circuit board.

(2) A method of connecting the lead wire and the flat wire to separate connectors and mounting each connector on the printed circuit board was considered.

FIG. 2 is a perspective view showing a conventional connecting method. Reference numeral 1 is a molded portion, 2 is a lead wire, 3 is a flat electric wire, 4 is a rectangular conductor, 5 is a caulking relay terminal, 6 is a comb spacer, and 7 is a welding connection portion. Flat electric wire 3 consisting of multiple rectangular conductors 4
And a plurality of lead wires 2 in which the caulking relay terminal 5 is attached to the wire end of the conductor of the lead wire 2, the rectangular conductor 4 and the tip of the caulking relay terminal 5 are overlapped and the overlapping portion is welded. Spot welding the connection part 7 to make an electrical connection,
The lead wire 2 is housed in the comb-shaped spacer 6, and then the whole is housed in the box-shaped molding part 1 and sealed with the molding resin.

[Problems to be Solved by the Invention]

When connecting the lead wire and the flat wire or the lead wire and the printed circuit board, in the environment where the vibration is severe such as automobiles, in order to keep the electrical stability and the mechanical strength of the contact sufficient for a long time, the connector It is necessary to connect to the exposed terminals on the printed circuit board using and solder the contact surface. Even if this still causes anxiety, it is desirable to perform spot welding as a highly reliable connection method.

In this case, the spot welding electrode is aligned with the connection terminal and the flat conductor, and the overlap welding part is pressed from above and below by the electrode of the spot welding machine. Have difficulty.

[Means for Solving the Problems]

According to the present invention, a plurality of accommodating grooves, partition walls, which are formed of a mold resin, are provided at regular intervals, a notch for fixing a lead wire at the entrance of the accommodating groove, the connection terminal exposed at the back of the accommodating groove, and an outer wall of the main body. Also, a main body having a partition for positioning on the partition, a partition having a receiving hole for a fixing pin, and a plurality of metal circuits embedded so that one end thereof constitutes the connection terminal, and a projection of the main body. , A receiving hole, a cutout corresponding to each of the notches, a protective cover having a fixing pin, and a notch are used to house the lead wire in the housing groove. Superimpose on the connection terminal, press the conductor and the connection terminal with the electrode of the spot welding machine, spot weld between the conductor and the connection terminal, and then cover the main body with the protective cover to form the circuit molded component. , Coated with mold resin By forming the connection part between the forming part and the lead wire, and making the pitch of the terminal at the other end of the circuit forming part match the pitch of the flat type electric wire, spot welding of the circuit forming part and the flat type electric wire can be easily performed. I did it. The above has solved the above-mentioned problem.

〔Example〕

FIG. 1 is a perspective view of a circuit molded component according to an embodiment of the present invention. In the figure, 10 is a circuit molded part, 11 is a metal circuit, 12 is a main body, and other symbols are those described above. The circuit-molded component 10 is made of a thermoplastic resin, and the metal circuits 11 having the terminals as the connection terminals 13 are arranged in parallel, and the metal circuits 11 are filled with the mold resin in the body 12, and a partition wall is provided at the front of the body 12. A portion 14 is provided, a plurality of accommodating grooves 15 at constant intervals, a partition 16 and a notch 17 for preventing lead wire pullout are provided at the input of the accommodating groove in the partition 14, and the connecting terminal is provided in the interior of the accommodating groove 15. Expose 13 In addition, a protrusion 18, a receiving hole 19, and a notch 17 are provided in the partition wall portion 14 that stops the protective cover that protects the connection portion when necessary.

FIG. 3 is a perspective view of the protective cover. The protective cover 20 protects the partition wall portion 14 that connects the lead wire 2 and the connection terminal 13. The protective cover 20 corresponds to the convex portion 18, the receiving hole 19, and the notch 17 of the partition wall portion 14, and the concave portion 18 ′ and the fixing pin. 1
9'and a notch 17 'are provided to cover the partition wall portion 14.

FIG. 4 is a side view of a lead wire of a round conductor wire with crimp relay terminals used in the present invention. The insulation coating 42 at the end of the lead wire 40 is peeled off, the caulking relay terminal 5 is brought into contact with the round conductor 41, and the caulking and connecting the caulking relay terminal 5 completes the end mounting of the lead wire.

FIG. 5 is a perspective view of the lead wire housed in the housing groove 15 of the circuit molded component 10 of the present invention. The lead wire 40 is housed in the fixing notch 17 and the housing groove 15, and the caulking relay terminal 5
Is brought into contact with the connection terminal 13 of the metal circuit 11. The caulking relay terminal 5 and the connecting terminal 13 are pressed from above and below by the electrode of the spot welding machine to perform welding connection. After the connection is completed, the protective cover 20 is fitted and attached to the partition wall portion 14 by the convex portion 18, the receiving hole 19, the concave portion 18 ', the positioning pin 19', etc. to protect the inside. The notches 17 and 17 ′ prevent the lead wire 2 from being drawn from the upper and lower sides from the throttle accommodating groove 14.

FIG. 6 shows the main body 12 in which the connection with the electric wire is completed at the partition wall portion 14.
Circuit molded component 1 configured by mounting on the protective cover 20
FIG. 6 is a perspective view of a molded portion 61 in which 0 is molded and coated with a resin such as PBT or polyacetate. Note that FIG. 6 shows the circuit molded component 10 and the lead wire 40.
And the side of the circuit molded component and the flat electric wire is omitted. In this case, the insulating coating 42 of the lead wire 2 is protected by the body 12 and the protective cover 20 against the heat of the high temperature resin during molding.

〔The invention's effect〕

According to the method of the present invention, the lead wire can be accommodated in the accommodating groove which is precisely defined, and the spot welding alignment is performed accurately. Moreover, when the conventional molding is performed, the melting deterioration due to heat of the insulating coating, which is expected to occur, does not occur. The circuit-molded component of the present invention prevents the occurrence of short circuit between adjacent conductors and insulation failure. Also, depending on the relationship of the overall space, the lead wire connection terminal covering part, including the connection terminal covering part, is integrated into a box shape in the molded part, so the drawing strength of the connection part, bending strength, moisture resistance, chemical resistance, etc. It has an effect on the environmental performance of and increases the reliability.

[Brief description of drawings]

FIG. 1 is a perspective view of a circuit molded component according to an embodiment of the present invention, and FIG.
FIG. 1 is a perspective view showing a conventional connecting method, FIG. 3 is a perspective view of a protective cover, FIG. 4 is a side view of a lead wire of a caulking relay terminal-equipped round electric wire used in the present invention, and FIG. FIG. 6 is a perspective view in which the lead wire is housed in the circuit molded component of FIG. 6, and FIG. 6 is a perspective view of the molded portion. 1 is a molded part, 2 is a lead wire, 3 is a flat wire, 4
Is a rectangular conductor, 5 is a caulking relay terminal, 6 is a comb-shaped spacer,
7 is a welded connection portion, 10 is a circuit molded component, 11 is a metal circuit, 12 is a main body, 13 is a connection terminal, 14 is a partition wall portion, 15
Is a receiving groove, 16 is a partition wall, 17 is a notch, 18 is a convex portion, 1
9 is a receiving hole, 20 is a protective cover, 17 'is a notch, 18'
Is a concave portion, 19 'is a fixed pin, 40 is a lead wire, 41 is a round conductor, 42 is an insulating coating, 61 is a molded portion.

Front page continuation (72) Inventor Keiichi Kojima 3-3 Satsukicho, Kanuma City, Tochigi Prefecture Sumitomo Electric Industries, Ltd. Kanto Works (72) Inventor Kiyoto Sugawara 3-3 Satsukicho, Kanuma City, Tochigi Prefecture Sumitomo Electric Industries Kanto Manufacturing Co., Ltd. (72) Inventor Tatsuo Matsuda 3-3 Satsuki-cho, Kanuma City, Tochigi Prefecture Sumitomo Electric Industries, Ltd. Kanto Manufacturing Co., Ltd. (72) Inventor Haruo Saen 3-3 Satsuki-cho, Kanuma City, Tochigi Prefecture Sumitomo Electric Industry Co., Ltd.Kanto Works (72) Inventor Shusaku Kawasaki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Hiroshi Hatase, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 72) Inventor Katsuya Saito 1006, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Tetsuo Yumoto 2-11-14, Kugahara, Ota-ku, Tokyo Sankyo Kasei Co., Ltd. (72) Inventor, Tokuo Yoshizawa 2-11-14 Kugahara, Ota-ku, Tokyo No. Sankyo Kasei Co., Ltd. (72) Inventor Toru Kanno No. 2-11-14, Kugahara, Ota-ku, Tokyo Sankyo Kasei Co., Ltd. (56) References Mitsuihei 1-140769 (JP, U) Mitsuko Sho 44- 1386 (JP, Y1) Actual public Sho 56-34713 (JP, Y2)

Claims (1)

[Claims] 1. A plurality of accommodating grooves and partition walls formed of a mold resin at regular intervals, lead wire fixing notches at the entrances of the accommodating grooves, connection terminals exposed in the rear of the accommodating grooves, outer walls of the main body, and partition walls. A main body having a positioning protrusion, a partition wall portion having a receiving hole for a fixing pin, and a plurality of metal circuits embedded so that one end thereof constitutes the connection terminal; A circuit molded part consisting of a protective cover with recesses, fixing pins, and notches corresponding to holes and notches, respectively, is used, the lead wire is housed in the housing groove, and the conductor of the lead wire is connected as described above. Superimpose on the terminal, press the conductor and the connection terminal with the electrode of the spot welding machine, spot weld between the conductor and the connection terminal, and then cover the main body with the protective cover to form the circuit molded part, Specially coated with mold resin Connecting part forming method of the circuit molded parts and leads to.