JP2010055820A - Electric connection structure and electric connection method of cord-like heater and lead wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connection structure and an electric connection method of a cord-like heater and lead wires, capable of preventing break of heating wires in the cord-like heater, and at the same time, with productivity and workability improved. <P>SOLUTION: In the electric connection structure of the cord-like heater having heating wires and lead wires having conductive wires, an exposed part of the heating wires in the cord-like heater and an exposed part of the conductive wires in the lead wires are inserted into an inside of a metal pipe, which is filled with a conductive material hardening at a given condition, and the cord-like heater and the lead wires are electrically connected with each other. The heating wires are not in pinching contact with the metal pipe. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electrical connection structure and an electrical connection method between a cord-like heater and a lead wire that can be used for, for example, an electric carpet, an electric blanket, a car seat heater, and the like. It is related with the thing which can prevent productivity and can improve productivity and workability | operativity.

  Conventionally, when a cord-shaped heater and a lead wire are electrically connected, solder is filled after being connected by a crimp terminal. (For example, refer to Patent Document 1, Patent Document 2, etc.).

Japanese Utility Model Publication No. 55-120081: Krabe JP-A-7-169557: Nippon Electric Heat

  Here, the heating wire used for the cord-like heater is generally made of an extremely thin wire. For this reason, when a crimp terminal is used, if the crimping force is as strong as possible, the heating wire is disconnected. Of course, if the pressure of the crimping is weak, it will not conduct or the cord-like heater will come off from the terminal. In addition, it is necessary to introduce a dedicated device for crimping the terminal, and a crimping process is required. Therefore, it has been difficult to improve productivity. In addition, if the terminal is misaligned during crimping, it will be in a so-called crimping failure state, which requires a very careful operation, and the operator may be caught in the crimping machine during the crimping operation. There was also danger and workability was not good.

  The present invention has been made to solve such problems of the prior art, and the object of the present invention is to prevent disconnection of a heating wire in a cord-like heater, and to improve productivity and work. It is an object of the present invention to provide an electrical connection structure and an electrical connection method between a cord-like heater and a lead wire that can improve the performance.

In order to achieve the above object, an electrical connection structure between a cord-like heater and a lead wire according to claim 1 of the present invention is an electrical connection structure between a cord-like heater having a heating wire and a lead wire having a conductor wire. The exposed portion of the heating wire in the cord heater and the exposed portion of the conductor wire in the lead wire are inserted into a metal pipe, and the inside of the metal pipe is filled with a conductive material that cures under a predetermined condition, The cord heater and the lead wire are electrically connected.
The electrical connection structure between the cord-like heater and the lead wire according to claim 2 is characterized in that the heating wire is not held in contact with the metal pipe.
According to a third aspect of the present invention, there is provided an electrical connection structure between the cord heater and the lead wire, wherein the cord heater has a structure in which a heating wire is wound around a core wire.
According to a fourth aspect of the present invention, there is provided an electrical connection structure between the cord-shaped heater and the lead wire, wherein the conductor wire of the lead wire is formed by twisting a plurality of strands.
Further, the electrical connection method between the cord-like heater and the lead wire according to claim 5 exposes the heating wire of the cord-like heater, exposes the conductor wire of the lead wire, and exposes the heating wire in the cord-like heater, And after inserting the exposed part of the conductor wire in the lead wire into the inside of the metal pipe, without applying a squeezing force to the metal pipe, the inside of the metal pipe is filled with a conductive material, The lead wire is electrically connected.

According to the present invention, since no force is applied to the heating wire of the cord heater during connection, disconnection of the heating wire can be prevented. Further, since the crimping process itself is not necessary, productivity and workability can be improved.
In addition, the present invention obtains a particularly excellent effect when a cord-like heater having a structure in which a heating wire is wound on a core wire or a lead wire having a conductor wire formed by twisting a plurality of strands is used. be able to. This is due to the following reason. A conductor wire having a structure in which a heating wire is wound on a core wire or a conductor wire formed by twisting a plurality of strands has irregularities on its surface, and a conductive material is filled in the irregularity gap to be cured. . Thereby, it can prevent that the electroconductive material hardened | cured by the clearance gap between this unevenness | corrugation is caught by an unevenness | corrugation, and a cord-like heater and a lead wire are pulled out by the anchor effect.

  Hereinafter, an embodiment of the present invention will be described with reference to FIG.

  First, the configuration of the cord heater 1 will be described. There is a core wire 3 made of an aromatic polyamide fiber bundle having an outer diameter of about 0.2 mm, and the outer periphery of the core wire 3 is made of a tin-plated hard tin-containing copper alloy wire (TH-SNCC-3) having a strand diameter of 0.08 mm. A heating wire 5 formed by aligning six heating element strands is spirally wound with a pitch of about 0.7 mm. The outer periphery of the heating wire 5 is extruded and coated with a tetrafluoroethylene-hexafluoropropylene copolymer (FEP) as an insulator layer 7 with a thickness of about 0.15 mm. Further, the outer periphery of the insulator layer 7 is further extruded and coated with a thickness of 0.2 mm of polyethylene (PE) as a heat sealing layer (not shown). The cord-like heater 1 has such a configuration, and its finished outer diameter is 1.1 mm. In the case of this embodiment, as described above, the heat seal layer is provided as a separate layer on the outer periphery of the insulator layer 7. A structure may be considered. In addition, the core wire 3 is effective in consideration of flexibility and tensile strength, but it is also possible that a plurality of heating element wires are aligned or twisted without using the core wire 3. . In addition, it is possible to cope with a heating wire having an insulating film formed around the core wire. The insulator layer 7 and the heat-sealing layer are stripped at the tip 8 mm of the cord-like heater 1 to expose the heating wire 5.

  Next, the configuration of the lead wire 11 will be described. 20 to 30 strands made of annealed copper with a strand diameter of 0.18 mm are twisted to form a conductor wire 13, an insulation coating 15 made of vinyl chloride resin is applied to the outer periphery, and a lead having an outer diameter of 2.2 to 2.4 mm Let it be line 11. The insulating coating 15 is stripped at the tip 8 mm of the lead wire 11 to expose the conductor wire 13.

  Next, a metal pipe 21 made of copper having a diameter of 4.0 mm, a length of 6 mm, and a thickness of 0.2 to 0.4 mm is prepared. From one end of the metal pipe 21, the exposed portion of the heating wire 5 in the cord heater 1 and the exposed portion of the conductor wire 13 in the lead wire 11 are inserted. At this time, since the inner diameter of the metal pipe 21 is sufficiently large with respect to the insertion portion of the cord-like heater or lead wire, even though the heating wire 5 may partially touch the metal pipe 21, The metal pipe 21 is not sandwiched and contacted. Therefore, no force such as crimping is applied to the heating wire 5, and the heating wire 5 does not break. In addition, as the material of the metal pipe 21, various materials such as materials such as copper, aluminum, and iron, alloys thereof, or those subjected to treatment such as plating can be used. The shape is not limited to a cylinder, and various shapes such as an elliptic cylinder and a square cylinder are conceivable. Further, in order to fill the inside of the metal pipe with a conductive material described later, a hole or a notch may be formed in the metal pipe.

  Then, by filling the molten solder as the conductive material 31 from the end opposite to the end where the cord heater and the lead wire are inserted in the metal pipe 21, the electrical connection structure according to the present embodiment is made. In this electrical connection configuration, no squeezing force is applied to the metal pipe 21. Even without applying a squeezing force, a sufficient pulling strength can be obtained by filling the inside of the metal pipe 21 with the conductive material 31. As the conductive material, a material that cures under predetermined conditions is used. As a specific mode, for example, a mode in which a low melting point metal such as the above-mentioned solder is melted and filled and then solidified and cured, a mode in which a conductive adhesive is filled and cured can be considered.

  In the above embodiment, the cord-like heater 1 and the lead wire 11 are inserted from one end of the metal pipe 21, but the cord-like heater 1 is inserted from one end of the metal pipe 21, and the lead wire 11 is inserted from the other end. That is also possible. Further, a plurality of cord-like heaters and a plurality of lead wires may be inserted inside the metal pipe 21. Further, not only the portion where the heating wire 5 and the conductor wire 13 are exposed, but also the portion of the insulator layer 7 and the insulating coating 15 may be inserted inside the metal pipe 21.

  As described above in detail, according to the present invention, disconnection of the heating wire in the cord heater can be prevented, and electrical connection between the cord heater and the lead wire that can improve productivity and workability. A structure can be obtained. Such an electrical connection structure can be suitably applied to various heating appliances such as, for example, a vehicle seat heater, a non-vehicle seat heater, an electric blanket, an electric carpet, a heating toilet seat, and a heating cooking appliance.

It is a figure which shows embodiment of this invention, and is a perspective view which shows the electrical connection structure of a cord-shaped heater and a lead wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Code heater 3 Core wire 5 Heating wire 7 Insulator layer 11 Lead wire 13 Conductor wire 15 Insulation coating 21 Metal pipe 31 Conductive material

Claims (5)

In the electrical connection structure of the cord-shaped heater having the heating wire and the lead wire having the conductor wire,
The exposed portion of the heating wire in the cord heater and the exposed portion of the conductor wire in the lead wire are inserted into a metal pipe, and the inside of the metal pipe is filled with a conductive material that cures under a predetermined condition, The cord heater and the lead wire are electrically connected to each other, wherein the cord heater and the lead wire are electrically connected. The cord heater and lead wire electrical connection structure according to claim 1, wherein the heating wire is not held in contact with the metal pipe. 3. The cord heater and lead wire electrical connection structure according to claim 1, wherein the cord heater has a structure in which a heating wire is wound around a core wire. 4. The electrical connection structure between a cord-like heater and a lead wire according to claim 1, wherein the conductor wire of the lead wire is formed by twisting a plurality of strands. After the heating wire of the cord heater is exposed, the conductor wire of the lead wire is exposed, and the exposed portion of the heating wire in the cord heater and the exposed portion of the conductor wire in the lead wire are inserted into the inside of the metal pipe A cord-like heater and a lead, wherein the metal pipe is filled with a conductive material without applying a squeezing force, and the cord-like heater and the lead wire are electrically connected. Wire electrical connection method.

Images