JP3175546B2 - Fuse and electric wire connection structure using the fuse - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuse and an electric wire connection structure using the fuse. More particularly, the present invention relates to a power supply line and a wire connected to a load-side electric component in an automobile wiring harness, which are optimal for the electric component. This allows direct connection via a fuse section.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, when power is supplied from a power supply (battery) B of an automobile to each of electrical components 1 to 5, a power supply line 6 connected to the power supply B via a fuse F is used.
And electric wires 7a to 7c each having one end connected to the electrical components 1 to 3.
Are connected at splice portions 8a to 8c, respectively,
Electric wires 7d and 7e connected to the electrical components 4 and 5 are connected by joint connectors 9, respectively.

A fuse F provided on the power supply line 6
Are usually provided in a junction box, a fuse box, or the like, and a tab provided on a bus bar connected to the power supply line 6 is fitted and connected to a terminal of the fuse F.

[0004]

In the above-described conventional electric wire connection structure, a short-circuit of a part of the electric wires 7a to 7e connected to each electric component or an overcurrent due to a trouble of a part of each electric component 1 to 5 causes When the fuse F is blown, all the electrical components 1
5 is stopped.

If the electric current of each of the electrical components 1 to 5 is 3 A (ampere), the fuse F has a capacity of 20 A. Accordingly, not only the power supply line 6 but also the electric component wires are used. 7a to 7e also need to be of a size (for example, 0.85 sq) that allows a capacity of 20 A, and thus there is a problem that the wire size increases, the weight increases, and the cost increases.

The present invention has been made in order to solve the above-mentioned problems. Even if there is a short-circuit in a part of an electric wire connected to an electric component or a trouble in a part of each electric component, the other electric components are not. It is an object of the present invention to supply power continuously and to reduce the size of electric wires connected to electrical components.

[0007]

In order to solve the above-mentioned problems, according to the present invention, there is provided a bus bar in which a wide portion and a narrow portion are alternately formed, and the narrow portion is used as a fuse portion. A power-side pressure-contact portion and a load-side pressure-contact portion each having one end continuous with each wide-width portion and a pressure-contact blade at the other end are provided, and a load-side pressure-contact portion is integrated on both sides of the power-side pressure-contact portion via the fuse portion. And a plurality of load-side electric wires are spliced to each of the power supply lines via a fuse.

In the fuse according to the first aspect, an electric wire (hereinafter referred to as an electric component side electric wire) connected to the electric component and a power supply line are connected to each other.
By connecting the power-side pressure-contact part and the load-side pressure-contact part via the fuse part of the fuse, short-circuits and troubles may occur due to short-circuits in some of the electrical component-side wires and overcurrent due to some troubles in each electrical component. Only the fuse part of the fuse dedicated to the existing electrical component is blown, and only the supply of power to the electrical component is stopped, so that power can be continuously supplied to other electrical components. In addition, since the connection between the electrical component side and the power supply line and the interposition of the fuse are performed at the same time, the number of operations is not increased.

[0009]

Further, when the above fuse is used, the power supply line and a plurality of electric component side electric wires can be spliced together with the fuse. In other words, the connection of the electric wire to the joint connector and the installation of the fuse can be performed simultaneously. Can be.

[0011]

Further, one end of the fuse portion and the pressure contact portion connected to the fuse portion are buried in a fuse block made of an insulating material. With the above configuration, the fuse can be used by inserting it into a fuse box provided in an electric connection box or the like.

Further, the fuse is accommodated in a splice press-connecting connector housing through which a plurality of electric wires are passed in parallel, and is connected to the electric wires by the press-contact blades of the respective press-contact portions. When the fuse is housed in the connector housing as described above, the connector can be used simply by simply attaching the connector to the connection between the power supply line and the electric component side electric wire.

According to the present invention, a power supply main line is routed over the entire interior of a vehicle, and electrical components mounted on various parts of the vehicle are connected to the shortest position of the power supply main line via a load-side electric wire. The connection provides an electric wire connection structure using a fuse in which the power supply main line and the load side electric wire are connected using the fuse according to the present invention.

With the above structure, each electric component-side electric wire can be easily connected to the power supply main line via the fuse at the shortest position with respect to the power supply main line arranged in the automobile with a single touch. Further, in the conventional system shown in FIG. 7, the size of the electric wire is regulated by the fuse F on the upstream side. However, when the electric wire connection structure is used, each electric component side electric wire is connected to the power supply main line via the fuse. Therefore, a fuse suitable for the capacity of the electrical component can be adopted, so that the electrical component side electric wire can be made the minimum necessary size, and the weight of the electric wire can be reduced.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. The parts having the same configuration and operation as those of the prior art in FIG. 7 are denoted by the same reference numerals, and detailed description is omitted. 1 and 2 show a fuse 10 according to the first embodiment.
It is. The power line 6 has a size (for example, 0.85 sq)
The electric component side electric wire 7 is made of a small electric wire having a size (for example, 0.3 sq) corresponding to the capacity of the electric component.

The fuse 10 includes a U-shaped power supply side pressure contact portion 10b having a pair of pressure contact blades 10a, 10a pressed against the power supply line 6, and a pair of pressure contact pressure contacting the electric component wires 7 (a to d). A U-shaped load-side pressure contact portion 10d having the blades 10c, 10c is integrally connected by a fuse portion 10e.

The fuse 10 is formed by narrowing the fuse portion 10e in accordance with the capacity of the electrical component to be connected. The fuse 10 can be formed integrally with a metal material for the fuse, or the power supply pressure contact portion 10b and the load-side pressure contact portion 10d can be formed with another metal material and connected with the fuse portion 10e of the metal material for the fuse. good.

Each press contact blade 10 of the power supply side press contact portion 10b
a and 10a are increased according to the size of the power supply line 6,
Each press contact blade 10c of the load side press contact portion 10d is made smaller in accordance with the size of the electrical component side electric wire 7. In addition,
Each press contact blade 10a, 10a and 10c, 10c may be only one press contact blade 10a, 10c, respectively.

The fuse 10 has a plurality of press-contact blades 10a, 1
0c is pressed against each of the electric wires 6 and 7, the respective press-connecting blades 10a and 10c cut off the insulating coating of each of the electric wires 6 and 7 and come into contact with the core wires 6a and 7f of each of the electric wires 6 and 7, thereby causing each of the electric wires 6 and 7 to contact each other. , 7.

The fuse 10 is housed together with the electric wires 6 and 7 in a synthetic resin splice press-connecting connector housing 11, and is closed and protected by a lid 11a. The press-connecting connector housing 11 has a pair of steps 11c for positioning and holding the fuse 10 protruding from the bottom inside a case 11b having an open upper surface and both left and right sides, and a housing 11d provided between the steps 11c. ing. The fuse 10 is housed in the housing portion 11d, and the pressure contact blades 10a and 10c are opened upward. The lid 11
a is connected to the upper end of one side wall of the case 11b via a thin hinge 11e, and the case 11b is closed when the lid 11a is closed.
b and the locked portion 11f and the locked portion 1
1g are provided on the lid 11a and the case 11b, respectively.

The power supply line 6 and the electric component side electric wire 7 are passed through the press-connecting connector housing 11 in parallel through openings on both left and right sides, and as shown in FIG. At the same time, the electrical component-side wires 7 are pressed and connected by the press-contact blade 10c. Therefore, these wires 6 and 7 are simultaneously connected via the fuse portion 10e.

FIG. 3 shows a fuse 12 according to the reference embodiment. The fuse 12 has a pressure contact blade 1 that presses against the power supply line 6.
A rectangular power supply side pressure contact portion 12b provided with an opening 2a at the lower end, and a rectangular load side provided with a pressure contact blade 12c opened at the lower end with a pressure contact blade 12c for pressing the electrical component side wires 7 (ad). The pressure contact portion 12d is integrally connected by a fuse portion 12e.

The fuse 12 is connected to a power source side pressure contact portion 12b.
And the upper part of the load side pressure contact part 12d and the fuse part 12e
Block 1 made of insulating material made of synthetic resin
3 and are connected by insert molding, and the fuse block 13 protects the fuse portion 12e.

As shown in FIG. 3B, the fuses 12 are inserted into the connector housing 14 through which the electric wires 6 and 7 pass in parallel, and the press-contact blades 12a and 12c are inserted downward, and the electric wires 6 and 7 are inserted. 7 is press-connected.

FIG. 4 shows a fuse 15 according to the second embodiment. The fuse 15 is used to press-connect two electric component side electric wires 7d and 7e to the power supply line 6 and is inserted from above into a connector housing 16 indicated by a dotted line in FIG. The power supply line 6 penetrated and the electric component-side electric wires 7d and 7e on both sides thereof are pressed against each other.

The fuse 15 has a rectangular power supply side pressure contact portion 15a provided with a pressure contact blade with a lower end opening, and load side pressure contact portions 15b, 15c located on both sides thereof. These pressure contact portions 15a, 15b, 15c Of the wide part 15
f, 15g, 15h and a fuse portion 15e composed of a narrow portion.
Wide portion 1 of a bus bar 15i in which the bus bars 15i are alternately formed.
5f to 15h. Note that the pressure contact portion may be bent from one side of the wide portion to be integrally formed.

In the connector housing 16, the power supply side pressure contact portions 15a are connected to the power supply line 6 and the load side pressure contact portions 15b and 15c on both sides are connected to the electrical component side wires 7d and 7e.
Connected to

With the above configuration, the electric component side electric wire 7d can be connected to the power supply line 6 via the fuse portion 15d, and at the same time, the power supply line 6 and the electric component side electric wire 7e can be connected via the fuse portion 15e.

FIG. 5 shows a first embodiment of the electric wire connection structure between the power supply B and the electric components 1 to 5 corresponding to the conventional circuit (see FIG. 7). 7a-7c
Is connected to the power supply line 6 using the fuse 10 (or 12), while the electric component side electric wires 7 of the electric components 4 and 5
d and 7e are connected to the power supply line 6 using the fuse 15 described above.

With the above configuration, for example, only the fuse portion 10e (12e) of the fuse 10 (12) dedicated to the electrical component 3 is caused by short-circuiting of the electrical component-side wire 7c or overcurrent due to a trouble in the electrical component 3. When the fuse is blown, the supply of power to the electrical component 3 is stopped, but the other electrical components 1
Power is subsequently supplied to 2, 4, and 5. Therefore, the supply of power to all the electrical components 1 to 5 does not stop as in the related art, so that the reliability of the electrical components 1 to 5 is improved. Similarly, when the electric component-side electric wire 7a is short-circuited, the supply of electric power to the electric component 1 is only stopped, and when the electric component-side electric wire 7e is short-circuited, the supply of electric power to the electric component 5 is only stopped. It is.

In the conventional system shown in FIG.
Assuming that the current of No. 5 is 3 A (ampere), a fuse F having a capacity of 20 A is used, and accordingly, the power line 6 has a size (for example, 0.8
5 sq) had to be used. On the other hand, in the system shown in FIG.
2, 15 fuse portions 10e, 12e, 15d, 15e
May have a capacity of 5 A, so that the electrical component side wires 7a to 7e
A thin wire (for example, 0.3 sq) allowing the capacity A can be used, and the size of the electric component-side electric wires 7a to 7e is reduced, so that the weight of the electric wires and the cost can be reduced.

FIG. 6 shows a second embodiment of the electric wire connection structure shown in FIG. 6, in which a power supply line extends around the entirety of the automobile 20 and is connected to a + B power supply main line 21 connected to a battery as the power supply line and to an ignition position of an ignition switch. And an IG power supply main line 22 connected thereto. These two power supply main lines 21 and 22 are divided into a section L1 of the total length on the left and right sides of the cowl panel, and a section L on the left and right sides and the front section on the engine room E side.
2. The cable is routed over the entire length L3 and L4 of the left and right sides of the cabin, and the full length L5 at the rear of the cabin. In addition, the ACC power supply main line connected to the accessory position of the ignition switch and the ST power supply main line connected to the start position of the ignition switch may be put together in the automobile as the power supply main line.

As described above, when the power supply main lines 21 and 22 extend around the vehicle, the electrical components 3 mounted on each part of the vehicle can be obtained.
0 is connected to the power supply trunk line 21 or 22 at the shortest position via the electric component side electric wire 31, and the connection portion is connected to the fuse 10 of the first embodiment, the fuse 12 of the second embodiment, or the third embodiment. Is used.

As described above, when the power supply main line extends around the entire interior of the automobile, the length of the electric component side electric wire 31 connecting the electric component 30 and the power supply main line can be shortened, and from this point, the weight of the electric wire can be reduced. In addition, the cost can be reduced. When retrofitting electrical components, even if the electrical components are mounted far away from the battery, etc., they can be connected to the shortest power supply main line, and they can be connected via fuses. can do.

[0036]

As is clear from the above description, in the fuse according to any one of the first to fifth aspects of the present invention, the power supply line and the electric component side electric wire are connected to each other through the fuse portion of the fuse. Is connected to the load-side press-contact part.Therefore, due to overcurrent caused by a short-circuit of a part of each electric component-side wire or a partial trouble of each electric component, a special Only the fuse part of the fuse is blown and the power supply to the electrical component is stopped,
Since power can be continuously supplied to other electrical components, the reliability of the electrical components is improved. Further, as the electric component side electric wire, a thin wire which allows the current capacity of the electric component can be used, so that the electric wire size can be reduced and the cost can be reduced.

In the electric wire connection structure using a fuse according to the fifth aspect, since the power supply line is connected via the fuse at a position where each electric component is connected, each electric component connecting the capacity of the fuse is connected. It can be set according to the capacity of the component, and as a result, the electrical component side electric wire can be made the minimum necessary size.

Further, when the electric wire trunk is stretched around the automobile, each electric component can be connected to the shortest power line, the length of the electric component side electric wire can be shortened, and a fuse can be easily connected with one touch. In addition, when an electric component is added and retrofitted, the electric component side electric wire can be easily retrofitted to the power supply line by using a fuse.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a fuse and a connector housing according to a first embodiment of the present invention.

2A is a plan view of the fuse of FIG. 1, and FIG. 2B is a front sectional view of the fuse housed in a connector housing.

3A and 3B are perspective views of the fuse according to the reference embodiment, and FIG. 3B is a cross-sectional view of the fuse inserted into a connector housing.

FIG. 4 is a fuse according to a second embodiment, in which (A) is a perspective view, (B) is a front view, and (C) is a bottom view.

FIG. 5 is a circuit diagram showing a first embodiment of the electric wire connection structure of the present invention.

FIG. 6 is a circuit diagram showing a second embodiment of the electric wire connection structure of the present invention.

FIG. 7 is a conventional electric wire connection circuit diagram.

[Explanation of symbols]

 B Power supply F Fuse 1-5 Electrical equipment 6 Power supply line 7 (a-e) Electrical equipment side electric wire 10, 12 Fuse 10a, 10c, 12a, 12c Pressure contact blade 10b, 12b Power supply pressure contact part 10d, 12d Load side pressure contact part 10e , 12e Fuse part 15 Fuse 15a Power supply side pressure contact part 15b, 15c Load side pressure contact part 15d, 15e Fuse part

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-105826 (JP, A) JP-A-7-123568 (JP, A) JP-A-3-155018 (JP, A) JP-A-7-105 254346 (JP, A) Japanese Utility Model 6-50221 (JP, U) Japanese Utility Model 4-51023 (JP, U) Japanese Utility Model 1-1123957 (JP, U) Japanese Utility Model 62-163852 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 85/00-85/22 H01R 13/68 H02G 3/16

Claims (4)

(57) [Claims] 1. A power supply side pressure contact having a bus bar having wide portions and narrow portions alternately formed, a narrow portion serving as a fuse portion, one end connected to each wide portion, and a press contact blade provided at the other end. And a load-side press-contact portion. A load-side press-contact portion is integrally provided on both sides of the power-supply-side press-contact portion via the fuse portion. A plurality of load-side electric wires are spliced to the power supply line via fuses. A fuse characterized in that it has a configuration to perform. 2. The fuse section and one end of the power-supply-side and load-side press-contact sections connected to the fuse section are buried in a fuse block made of an insulating material.
Fuse as described in. 3. The splice crimping connector housing through which a plurality of electric wires penetrate in parallel is housed in the splice press-connecting connector housing, and the fuses are press-connected to the electric wires by press-fitting blades of the fuse. Fuse as described in. 4. A power supply main line is routed over the entire interior of the vehicle, and electrical components mounted on each part of the vehicle are connected to the shortest position of the power supply main line via a load-side electric wire. An electric wire connection structure using a fuse, wherein the power supply main line and the load side electric wire are formed using the fuse according to any one of claims 1 to 3.