JPH11312454A - Large current fuse for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a large current fuse for an automobile in which the load on a fuse is reduced. SOLUTION: In this large current fuse 1A for an automobile, a first and second conductive plates 4, 5 are continuously formed flush with each other and in the same direction at both ends of a fuse 2 having a fusing part, an first and second mounting parts 4a, 5a to a mating apparatus are formed in the first and second conductive plates, respectively, and the first and second mounting parts are set close to each other. Then, the first and second conductive plates excluding the fuse and the first and second mounting parts are integarally molded with a resin body 8, a fuse window 9 facing to the fuse is formed in the resin body and the fuse window is covered with a cover 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high current fuse for an automobile mounted in an automobile.

[0002]

2. Description of the Related Art Conventionally, as a fuse directly attached to a device such as a starter motor, an alternator, and a battery,
A large current fuse 80 for a vehicle as shown in FIG. 6 has been proposed (Japanese Patent No. 2637846).

The high-current fuse (hereinafter, referred to as a high-current fuse) 80 for a vehicle is a bolt-in type, has a fusible fuse 81 at an intermediate portion, and a pair of conductor plates 82, And each conductor plate 8
2, an assembling hole 83 is opened, and the fusible fuse 81 is covered with a pair of covers 84,84. As shown in FIG.
After the mounting hole 83 of the large current fuse 80 is inserted into the stud bolt 86 erected on the device 85, the conductor plate 82 is screwed to the stud bolt 86 with the nut 87. In addition,
Reference numeral 81a denotes a fusing portion provided at an intermediate portion of the fusible fuse.

However, since the interval (pitch) L between the pair of mounting holes 83, 83 is long (wide) (see FIG. 6), the large current fuse 80 becomes cantilevered (overhang). As a result, as the distance L increases, the load from the connection wires (not shown) connected to the high-current fuse 80 and the device 85 increases with respect to the fusible fuse 81, and the mounting of the high-current fuse 80 There is a disadvantage that the method and the mounting state are limited.

[0005]

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a high current fuse for an automobile in which the load on a fusible fuse is reduced.

[0006]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a fusible fuse having a fusing portion, wherein first and second conductor plates are coupled to both ends in the same plane and in the same direction, Also, the first and second conductor plates are provided with first and second mounting portions for the counterpart device, respectively, and the high current fuse for an automobile in which the first mounting portion and the second mounting portion are brought close to each other is characterized. (Claim 1). The fusible fuse and the first and second conductor plates excluding the first and second assembly parts are integrally formed with a resin body, and a fuse window facing the fusible fuse is formed in the resin body. In addition, the present invention is characterized by a large current fuse for automobiles in which a transparent cover is mounted on the fuse window (claim 2).

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of a high current fuse for a vehicle according to the present invention.

In FIG. 1, this large current fuse 1A
The first and second conductor plates 4 and 5 are coupled to both ends 2a and 2a of the fusible fuse 2 in the same plane and in the same direction, and the fusible fuse 2 and the two conductor plates 4 and 5 are connected to the resin body 8. And a resin body 8 so that the fusible fuse 2 can be seen.
With a transparent cover 10 mounted thereon.

As shown in FIG. 2, the fusible fuse 2 has a fusing portion 3 which is melted by its own heat in an intermediate portion. Thus, when an excessive current exceeding the allowable range flows through the large current fuse 1A, the fusing portion 3 is automatically blown.

As shown in FIGS. 1 and 2, the shapes of the first and second conductor plates 4, 5 and the fusible fuse 2 are substantially U-shaped. In this embodiment, stud bolts for directly attaching to the equipment are provided on the first conductor plate 4 (corresponding to the first assembly part of claim 1).
4a is provided upright, and an assembling hole for electrically connecting to another device is provided in the second conductor plate 5 (corresponding to the second assembling part of claim 1).
5a has been established. The role of the stud bolt 4a of the first conductor plate 4 and the role of the mounting hole 5a of the second conductor plate 5 may be exchanged, or the mounting holes 5a may be formed in both the first and second conductor plates 4 and 5. It is also possible to provide only the stud bolt 4a.

As described above, since the fusible fuse 2 and the first and second conductor plates 4 and 5 are formed in a substantially U-shape, the stud bolt 4a of the first conductor plate 4 and the second conductor plate 5 Assembly hole 5
The distance D with respect to “a” is shorter than in the related art, and they are close to each other. As a result, the load applied to the fusible fuse 2 from the connection wires and devices (not shown) connected to the large current fuse 1A can be reduced as compared with the related art. That is, the strength of the large current fuse 1A can be improved with respect to the load. In addition, due to the improvement of the strength, it is possible to ease restrictions on the mounting method and the mounting state of the large current fuse 1A as compared with the related art.

When a large current fuse 1A to which connection wires and devices are connected is mounted on a vehicle (not shown),
Since the distance D (see FIG. 2) between the stud bolt 4a of the first conductor plate 4 and the mounting hole 5a of the second conductor plate 5 is reduced, the vibration of the fusible fuse 2 during traveling decreases.

Further, the size of the large current fuse 1A can be made smaller than before. Thereby, the work space required for connecting the connection wires and devices to the large current fuse 1A can be centralized. Therefore, a work space can be saved.

As shown in FIGS. 1, 3 and 4, the resin body 8 has a first conductor plate 4 excluding the surface from which the stud bolt 4a protrudes, and a second conductor excluding the front and back surfaces around the mounting hole 5a. The conductor plate 5 and the fusible fuse 2 are integrally formed. A fuse window 9 is formed on the front and back surfaces of the resin body 8 facing the fusible fuse 2, and a transparent cover 10 is mounted on the fuse window 9. Thereby, the operator can easily see the state of the fusible fuse 2 via the transparent cover 10.

Next, the use state of the large current fuse 1A will be described. As shown in FIG. 5, the magnetic switch 2
Of the two stud bolts 21 and 22 protruding from 0, the left stud bolt 22 has a mounting hole 5a (see FIG. 1) for the large current fuse 1A and a battery-side terminal 23 from a battery (not shown). Are screwed together with one nut 24 in common. An alternator side terminal 25 from an alternator (not shown) is screwed to a stud bolt 4a (see FIG. 1) of the large current fuse 1A with a nut (not shown).

A motor side terminal 27 from a starter motor 26 is screwed to a right stud bolt 21 of the magnetic switch 20 by a nut 28. Thus, the battery side terminal 23 and the alternator side terminal 2
5 can be electrically connected in close proximity via the large current fuse 1A, so that the load on the fusible fuse 2 of the large current fuse 1A from the battery side terminal 23 and the alternator side terminal 25 can be reduced as compared with the conventional case. .

[0017]

As described above, according to the first aspect, the first and second conductor plates are coupled to both ends of the fusible fuse having the fusing portion in the same plane and in the same direction. The conductor plate has a first and a second assembling portion for the counterpart device, respectively. Thereby, the first assembly part and the second assembly part can be brought close to each other. Therefore, for example, when a mating device or a connecting wire is electrically connected to the first mounting portion and the second mounting portion, respectively, the load applied to the fusible fuse from the mating device or the connecting wire is reduced. be able to. That is,
The strength of the high-current fuse against the load from the partner device or the connection wire can be increased as compared with the conventional case.

According to the second aspect of the present invention, since the resin body is integrally formed with the fusible fuse and the first and second conductor plates excluding the first and second assembly parts, the fusible fuse and the two conductors are formed. The strength of the board is improved. Further, since the fuse window facing the fusible fuse is formed in the resin body and the transparent cover is mounted on the fuse window, the appearance of the fusible fuse can be seen. This makes it possible to easily check the state of the fusible fuse even when the large current fuse is mounted on the vehicle.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a large current fuse for an automobile according to the present invention.

FIG. 2 is a diagram showing a connection state between a fusible fuse and first and second conductor plates in FIG. 1;

FIG. 3 is a view from the direction of arrow A in FIG. 1;

FIG. 4 is a view from the direction of arrow B in FIG. 1;

FIG. 5 is a diagram showing a use state of FIG. 1;

FIG. 6 is an exploded perspective view of a conventional large current fuse for an automobile.

FIG. 7 is an explanatory diagram showing a state in which the automobile high-current fuse of FIG. 6 is assembled to a device.

[Explanation of symbols]

 Reference Signs List 1A (for automobile) large current fuse 2 fusible fuse 3 fusing portion 4 first conductor plate 4a stud bolt (first assembly portion) 5 second conductor plate 5a assembly hole (second assembly portion) 8 resin body 9 Fuse window 10 Transparent cover

Claims (2)

[Claims] 1. A fusible fuse having a fusing portion, first and second conductor plates are coupled to both ends in the same plane and in the same direction, and the first and second conductor plates are connected to the first and second conductor plates with respect to a counterpart device. A large current fuse for an automobile, wherein a first mounting part and a second mounting part are provided close to each other. 2. The fusible fuse and the first and second conductor plates excluding the first and second assembly parts are integrally formed with a resin body, and the resin body is opposed to the fusible fuse. 2. A large current fuse for an automobile according to claim 1, wherein a fuse window is formed, and a transparent cover is mounted on the fuse window.