JP2000208173A - Connecting structure of electric circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a sufficient radiation area and improve the radiation efficiency by commonly crimping one end of a radiation wire together with a circuit wire for supplying heavy current to a connecting terminal, extending the other end of the radiation wire in the state separated form the circuit wire, and winding an insulating tape thereon to form an insulating treatment part. SOLUTION: A bus bar 13a within a relay block 13 has a connecting tub 13c for each apparatus on one end and a connection part 13b having screw bores 13d, 13e on the other end. One-side ends of radiation wires 16, 17 are commonly crimped to connecting terminals 11a, 12a having bolt holes Ba together with the ends of circuit wires 11, 12 connected to a battery 10a and an alternator 10b. The other ends of the radiation wires 16, 17 are extended at a distance from the circuit wires 11, 12, and insulating treatment parts 16a, 17a for preventing the exposure of core wires are formed at the ends. According to this, bolts B are fastened to the screw bores 13d, 13e through the bolt holes Ba, and the radiation surface area is increased to improve the radiation efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure for an electric circuit, and more particularly to a structure for efficiently radiating an electric circuit to which a large current is supplied.

[0002]

2. Description of the Related Art As shown in FIG. 4, for example, circuit wires 1 and 2 for supplying a large current connected to a battery mounted on a vehicle and an alternator are connected to a relay block 3.
To the connecting portion 3b of the bus bar 3a constituting the electric circuit in the
Each is divided and connected by bolts B via connection terminals 1a and 2a. When a large current is supplied to the electric circuit in the direction indicated by arrow A, heat is generated near the connection portion 3b.

In order to suppress the heat generation, it is effective to increase the size of the electric wire. However, depending on the size of the terminal corresponding to the mating component, it may not be possible to crimp the connection terminal 1a. It is also conceivable to increase the thickness of the bus bar 3a, but this may not be possible due to the effective space of the relay block 3.

[0004]

Therefore, as shown in FIG. 5, the circuit wire 5 and the heat radiating wire 6 are jointly crimped to the connection terminal 4 to radiate excess heat from the heat radiating wire 6. There is a configuration as described above (Japanese Patent Laid-Open No. 9-35766).

However, the heat radiating wire 6 is spirally wound around the circuit wire 5 so that the terminal is connected to the circuit wire 5.
Is fixed with the tape T, the heat radiation area of the heat radiation wire 6 is reduced, and the heat radiation efficiency is reduced. In addition, since the terminal treatment of the heat radiating wire 6 is also performed by winding the normal tape T, the heat radiating wire 6 is turned by the winding of the tape T.
Are easily exposed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has been made in consideration of the above-described problems, and has been made in consideration of the above problem. It is an object to provide a connection structure.

[0007]

In order to solve the above-mentioned problems, the present invention is directed to a first aspect of the present invention, in which a connection portion of a bus bar constituting an electric circuit is crimped to an end of a circuit electric wire for supplying a large current. In the connection structure of the electric circuit to which the connection terminals are connected, one end of the heat radiation wire is commonly crimped to the connection terminal together with the circuit wire, and the other end of the heat radiation wire is separated from the circuit wire. It is extended in the state, and an insulating tape is wrapped around the end of the heat dissipation wire to form an insulation treatment part,
The insulating portion is provided with an extension portion which is wound from a position in front of the terminal of the heat radiation wire and is extended to a position slightly beyond the terminal, and the extension portion is folded back to the terminal of the heat radiation wire and further extended. The present invention provides a connection structure for an electric circuit, which is fixed around a terminal by a tape.

According to the above configuration, the heat generated in the electric circuit due to the supply of the large current can be radiated by the radiating wire through the connecting fitting connected to the connecting portion of the bus bar. Since the electric wire is completely separated from the circuit electric wire, the heat radiation area is large, and a large heat radiation effect can be obtained. In addition, since the end of the heat-radiating wire is double-wrapped by folding the extended portion extended by tape winding, the core wire of the terminal of the heat-radiating wire is exposed even by peeling of the tape to some extent. Can be reliably prevented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows, as an example of an electric circuit connection structure, a relay block 13 mounted on a vehicle in which a path from a battery 10a to an alternator 10b is cut off and connected. A bus bar 13a constituting an electric circuit is disposed in the relay block 13, a tab 13c for connection to a device requiring a large current is formed at one end, and a circuit tab connected to the battery 10a is formed at the other end. A plate-shaped connecting portion 13b having screw holes 13d and 13e for connecting the electric wire 11 and the circuit electric wire 12 connected to the alternator 10b is formed.

On the other hand, as shown in FIG. 2, connection terminals 11a and 12a having bolt holes Ba are crimped to the terminals of the circuit wires 11 and 12, and the connection terminals 11a and 12a are crimped.
In addition to the electric wires 11 and 12 for the circuit,
7 are crimped together at one end. The other ends of the heat radiating wires 16 and 17 are connected to the circuit wires 11 and 12 in order to secure a heat radiating surface area.
The terminals are separated from each other, and the terminals are provided with insulation processing portions 16a and 17a to prevent exposure of the core wire.

The insulation processing sections 16a and 17a are shown in FIG.
As shown in FIG. 3A, an insulating tape Ta is wound inward from the ends of the heat-radiating wires 16 and 17 by a required dimension a from the near side, and as shown in FIG. The extended portions 16b and 17b are formed by extending from the insulating tape Ta to the position where the tape is placed.

Next, as shown in FIGS. 3C and 3D,
The extension portions 16b and 17b are folded inward, and furthermore, the insulating tape Ta is wrapped and fixed, so that the insulation processing portions 16a and 17a in which the terminal portions have been reliably insulated can be obtained (FIG. 3E). ).

Then, as described above, the circuit wire 1
The connection terminals 11a and 12a, which are jointly crimped to the ends of the heat dissipation wires 16 and 17, are matched with the screw holes 13d and 13e of the connection portion 13b of the relay block 13, respectively.
A required electric circuit is configured by tightening and fixing with bolts B. When a large current is supplied from the battery 10a to the connection structure of the electric circuit having the above-described configuration, heat is generated in the vicinity of the connection portion 13b, but the heat is separated from the circuit wires 11 and 12, and the heat radiation area is large. Heat is efficiently radiated through the set heat radiation wires 16 and 17. In addition, since the extension portions 16b, 17b of the wound insulating tape T are folded back and further wound around the terminals of the heat radiation wires 16, 17, there is no possibility that the core wire is exposed from the terminals.

[0014]

As is apparent from the above description, according to the connection structure of the electric circuit of the present invention, the heat generated at the connection portion when a large current is supplied can be radiated by the heat diffusion of the radiating wire. Since the heat-dissipating wires are separated from the circuit wires, a sufficient heat-dissipating area can be secured and the heat-dissipating efficiency can be improved. In addition, the end of the heat-radiating wire extends from the end by winding the insulating tape,
Since the tape is folded back inward and further fixed by tape winding, exposure of the core wire from the end can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a drawing showing a connection structure of an electric circuit of the present invention.

FIG. 2 is a drawing showing a common crimping state of a circuit wire and a heat dissipation wire to a connection terminal.

3 (A) to 3 (E) are drawings showing a terminal treatment step of a heat dissipation wire.

FIG. 4 is a drawing showing a conventional example.

FIG. 5 is a drawing showing a conventional example.

[Explanation of symbols]

 B Bolt Ta Insulating tape 11, 12 Circuit wire 11a, 12a Connection terminal 13a Bus bar 13b Connection portion 16, 17 Heat dissipation wire 16a, 17a Insulation processing portion 16b, 17b Extension portion

Claims (1)

[Claims] 1. A connection structure of an electric circuit in which a connection terminal crimped to an end of a circuit electric wire for supplying a large current is connected to a connection portion of a bus bar constituting an electric circuit, wherein the connection terminal comprises: One end of the heat-dissipating wire is crimped together with the circuit wire, the other end of the heat-dissipating wire is extended away from the circuit wire, and an insulating tape is wrapped around the end of the heat-dissipating wire for insulation. Forming a processing part, the insulation processing part is provided with an extending part which is tape-wrapped from a position in front of the terminal of the heat radiating wire and extends to a position slightly beyond the terminal, and the extending part is a heat radiating wire. A connection structure for an electric circuit, wherein the connection structure of the electric circuit is folded back at the terminal and further wound around the terminal with a tape.