JP4101184B2 - Connection structure of LED for lamp and flat cable - Google Patents

Description

The present invention relates to the LED for lamp having a plate-like lead (light emitting diode) in the connection structure of a flat cable.

Connection for lamp used like vehicle lamp LE D and the wiring material has been carried out by soldering the leads provided on the bottom surface of the LED to the circuit board. However, since soldering has some drawbacks, a method for directly connecting the LED lead to the round wire of the wire harness without soldering has been proposed as an improvement (Patent Document 1). 2).

JP 2001-44510 A JP-A-10-208515

On the other hand, for in-car wiring of automobiles and the like, flat cables having better wiring space factor, better heat dissipation, and larger current capacity have been used compared to wire harnesses in which round electric wires are bundled. The flat cable is obtained by applying a collective insulating coating to a plurality of flat conductors arranged in parallel by pasting or extrusion coating of a plastic film. Moreover, as a lead | read | reed of LED for vehicle lamps, the plate-shaped lead is used from relationship, such as heat dissipation and a current capacity.

However, no means has yet been developed for simply and reliably connecting a lamp LED having a plate-like lead to a flat cable having the above advantages without soldering.

SUMMARY OF THE INVENTION An object of the present invention is to provide a connection structure capable of easily and reliably connecting a lamp LED having a plate- like lead to a flat cable without soldering.

The present invention is a connection structure of a lamp LED having a plate-like lead and a flat cable in which a flat conductor is coated with an insulating coating, and the plate-like lead of the lamp LED has higher rigidity than the flat conductor. The plate-like lead of the LED for the lamp is superimposed on the flat conductor of the flat cable without peeling off the insulation coating, and a shearing portion with both ends of the two strips closed is provided in parallel or substantially parallel to the overlapping portion. The overlapping part between the two shearing parts is shaped so as to rise to the plate-like lead side, so that the shearing surface of the plate-like lead and the shearing surface of the flat conductor are in contact with each other by the shearing new surface Thus, electrical connection is made.

The connection structure of the present invention is a connection structure between an LED for a lamp having a plate-like lead and a flat cable in which a flat conductor is covered with an insulating coating, and the plate-like lead of the LED for a lamp is more rigid than the flat conductor. The plate-like lead of this LED for lamps is superimposed on the flat conductor of the flat cable without peeling off the insulation coating, and the sheared part with both ends of the three stripes closed is parallel or almost parallel to this overlapped part. The overlapping portion between the central shearing portion and the shearing portion on one side is formed so as to rise to the plate-like lead side, and the overlapping portion between the central shearing portion and the shearing portion on the other side is formed. It is shaped so as to rise to the flat cable side, so that the shear surface of the plate-like lead and the shear surface of the flat conductor come into contact with each other on the new surfaces due to shearing and electrical connection is not established. It is preferred that.

The connection structure of the present invention is a connection structure between an LED for a lamp having a plate-like lead and a flat cable in which a flat conductor is covered with an insulation coating,
The plate-like lead of the lamp LED is made of a material having higher rigidity than the flat conductor, and the plate-like lead of the lamp LED is superposed on the flat conductor of the flat cable without peeling off the insulation, The four ends of the sheared portion are closed in parallel or substantially parallel, and the overlapping portion between the two one-sided shearing portions and the overlapping portion between the other two-sided shearing portions are the plate. More preferably, the plate-shaped lead is formed so as to protrude toward the side of the lead, so that the shearing surface of the plate-like lead and the shearing surface of the flat conductor are in contact with each other on the new surfaces due to shearing, and are electrically connected.

In the connection structure of the present invention, it is preferable that the lamp LED and the flat cable are connected at an intermediate portion in the longitudinal direction of the flat cable.

According to the present invention, the plate-like lead and the flat conductor can be obtained by simply shearing a part of the overlapping portion of the plate-like LED lead for the lamp and the flat conductor of the flat cable and bending the gap between the sheared portions. Therefore, the plate-like lead of the LED for a lamp and the flat conductor of the flat cable can be easily connected without peeling off the insulating coating of the flat cable. In particular, according to the present invention, since the new surfaces due to shear come into contact with each other, there is little influence of oxidation on the conductor surface, and a reliable contact conduction state can be obtained. Further, a portion between the shearing section by molded to bulge in a plate-like lead side, it is possible to obtain a more stable connection state.

  Embodiment 1 FIG. 1 shows an embodiment of a connection structure according to the present invention. In the figure, 10 is an LED used as a vehicular lamp, 12 is a plate-like lead of the LED 10, and 14 is a flat cable. The flat cable 14 is obtained by applying a collective insulation coating 18 to a plurality of flat conductors 16 (two in the illustrated example). For example, a copper tape having a thickness of 0.15 mm and a width of 5.2 mm is used for the flat conductor 16, and a polyethylene terephthalate film is used for the insulating coating 18, for example. The thickness of the flat cable 14 using these materials is 0.33 mm.

  The plate-like lead 12 of the LED 10 is superimposed on the flat conductor 16 of the flat cable 14 without peeling off the insulating coating 18. Two parallel shearing portions a and b are provided in the longitudinal direction of the flat conductor 16 at the overlapping portion of the plate-like lead 12 and the flat conductor 16. The shearing portions a and b are formed in a state where both ends are closed (not reaching the edge of the plate-like lead 12). The overlapping portion 20q between the shearing portions a and b is raised on the plate-like lead 12 side so as to be different from the overlapping portions 20p and 20r on both sides thereof. Thereby, the shearing surface of the plate-like lead 12 and the shearing surface of the flat conductor 16 are in contact as shown in FIG. 1D, and the plate-like lead 12 and the flat conductor 16 are electrically connected.

  The connection structure in which the overlapping portion 20q between the shearing portions a and b is raised as described above can be easily obtained with a mold as shown in FIG. This die is composed of a male die 22 having a convex blade portion 4 and a female die 26 having a concave blade portion 28. As described above, the overlapping portion of the plate-like lead 12 and the flat conductor 16 is disposed between the male die 22 and the female die 26 and the convex blade portion 24 and the concave blade portion 28 are fitted. Can be obtained.

  In the connection structure of this embodiment, since the new surfaces due to shear come into contact with each other, there is little influence of oxidation on the conductor surface, and a reliable contact conduction state can be obtained. In addition, it takes less time to remove the insulation coating and does not require heating, so connection is easier than soldering.

In addition, as shown in FIG. 3, the shearing portions a and b can be formed such that the overlapping portion 20q between the shearing portions a and b is raised on the flat cable 14 side. However , according to a connection experiment using a snap-type LED having a plate-like lead having a thickness of 0.25 mm and a flat cable having a thickness of 0.33 mm having a flat conductor having a thickness of 0.15 mm, as shown in FIG. It has been found by measurement of contact resistance that a more stable connection state can be obtained by raising the overlapping portion 20q between b and b toward the plate-like lead 12 side. This is considered due to the fact that the rigidity of the flat cable 14 is lower than that of the plate-like lead 12. That is, when the intermediate overlapping portion 20q is raised to the flat cable 14 side as shown in FIG. 3, the flat cable 14 having low rigidity can easily escape to both sides at the time of shearing, and the shear surface of the flat conductor 16 and the plate shape It is considered that the contact state with the shearing surface of the lead 12 becomes unstable. On the other hand, when the intermediate overlapping portion 20q is raised toward the plate-like lead 12 as shown in FIG. 1, the flat cable 14 with low rigidity is brought into close contact with the plate-like lead 12 with high rigidity and sheared, and this state is Therefore, the contact state between the shear surface of the flat conductor 16 and the shear surface of the plate-like lead 12 is considered to be stable.

  FIG. 4 shows an example in which a flat cable 14 in which a plurality of LEDs 10 are connected as shown in FIG. 1 is wired on a support base 30 to constitute a vehicle lamp. The support base 30 is formed in a step shape according to the shape of the lamp lens portion. The flat cable 14 is bent stepwise along the surface of the support base 30 and is held on the support base 30 by fixing claws 32 formed on the support base 30. Accordingly, a vehicle lamp in which a plurality of LEDs 10 are three-dimensionally arranged according to the shape of the lamp lens portion can be configured. A connector 34 having a pair of male terminals 36 is attached to one end of the flat cable 14, and the flat cable 14 is connected to a power source by the connector 34.

  Embodiment 2 FIG. 5 shows another embodiment of the connection structure according to the present invention. In this connection structure, three strips a, b, c are provided in parallel in the overlapping portion of the plate-like lead 12 and the flat conductor 16, and the overlap between the central shearing portion b and the one-side shearing portion a is performed. The mating part 20q is shaped so as to rise to the plate-like lead 12 side, and the overlapping part 20r between the central shearing part b and the shearing part c on the other side is shaped so as to rise to the flat cable 14 side. It is what. The overlapping portions 20p and 20s on both sides remain flat. Other configurations are the same as those in the first embodiment. With this configuration, the contact area between the shear surface of the plate-like lead 12 and the shear surface of the flat conductor 16 can be made larger than in the case of the first embodiment.

  Embodiment 3 FIG. 6 shows still another embodiment of the connection structure according to the present invention. In this connection structure, four striped portions a, b, c, and d are provided in parallel on the overlapping portion of the plate-like lead 12 and the flat conductor 16, and the overlap between the two striped portions a and b on one side is provided. The mating part 20q and the overlapping part 20s between the other two shearing parts c and d on one side are formed so as to rise to the plate-like lead 12 side. The other overlapping portions 20p, 20r, and 20t remain flat. Other configurations are the same as those in the first embodiment. With such a configuration, the contact area between the shear surface of the plate-like lead 12 and the shear surface of the flat conductor 16 can be made larger than those in the first and second embodiments.

One Embodiment of the connection structure which concerns on this invention is shown, (A) is a top view, (B) is a partially cutaway front view, (C) is CC sectional view taken on the line of (B), (D) is ( B) DD sectional view taken on the line. The perspective view which shows an example of the metal mold | die for obtaining the connection structure of FIG. Sectional drawing which shows the modification of the connection structure of FIG. The perspective view which shows the principal part of the lamp | ramp for vehicles using the connection structure of FIG. Sectional drawing which shows other embodiment of the connection structure which concerns on this invention. Sectional drawing which shows other embodiment of the connection structure which concerns on this invention.

Explanation of symbols

10: LED for lighting
12: Plate-shaped lead 14: Flat cable 16: Flat conductor 18: Insulation coatings a, b, c, d: Sheared portions 20p to 20t: Overlapping portion of the plate-shaped lead 12 and the flat conductor 16

Claims (4)

It is a connection structure between a lamp LED having a plate-like lead and a flat cable in which a flat conductor is covered with an insulation coating,
The plate-like lead of the lamp LED is made of a material having higher rigidity than the flat conductor, and the plate-like lead of the lamp LED is superposed on the flat conductor of the flat cable without peeling off the insulation, The two ends of the two strips are closed in parallel or almost in parallel, and the overlapping portion between the two strips is shaped so as to rise to the plate-like lead side. A connection structure between a LED for a lamp and a flat cable, wherein the shear surface of the lead and the shear surface of the flat conductor are brought into contact with each other at the newly formed surfaces by shearing to make electrical connection. It is a connection structure between a lamp LED having a plate-like lead and a flat cable in which a flat conductor is covered with an insulation coating,
  The plate-like lead of the lamp LED is made of a material having higher rigidity than the flat conductor, and the plate-like lead of the lamp LED is superposed on the flat conductor of the flat cable without peeling off the insulation, Are formed so that the overlapping part between the central shearing part and the one side shearing part protrudes toward the plate-shaped lead side. Is formed so that the overlapping part between the part and the shearing part on one side rises to the flat cable side, so that the shearing surface of the plate-like lead and the shearing surface of the flat conductor are in contact with each other on the new surface by shearing The connection structure of LED for lamps and a flat cable, characterized in that electrical connection is made. It is a connection structure between a lamp LED having a plate-like lead and a flat cable in which a flat conductor is covered with an insulation coating,
  The plate-like lead of the lamp LED is made of a material having higher rigidity than the flat conductor, and the plate-like lead of the lamp LED is superposed on the flat conductor of the flat cable without peeling off the insulation, The four ends of the sheared portion are closed in parallel or substantially parallel, and the overlapping portion between the two one-sided shearing portions and the overlapping portion between the other two-sided shearing portions are the plate. The lamp is characterized in that it is shaped so as to protrude to the side of the lead, and the shear surface of the plate-like lead and the shear surface of the flat conductor are brought into contact with each other by the new surfaces due to shearing to make electrical connection. LED and flat cable connection structure. The connection structure between the LED for a lamp and the flat cable according to any one of claims 1 to 3, wherein the connection between the LED for the lamp and the flat cable is made at an intermediate portion in the longitudinal direction of the flat cable.

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