JP2007265954A - Fuse and fuse connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuse which is made smaller by improving a projecting direction of a fuse terminal. <P>SOLUTION: A fuse main body 11 of the fuse 10 made of a conductive metal plate is connected with a pair of an input terminal 12 and an output terminal 13 by a blowout part 14, and the input terminal 12 and the output terminal 13 are bent in a U-shape or a Z-shape in right angles with a connecting direction of the blowout part 14, and at least the blowout part 14 is covered with a housing made of an insulating resin. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fuse and a fuse connection structure, and more specifically, to improve the protruding direction of the terminal of the fuse to reduce the size of the fuse, and to save space in the connection structure with the internal circuit of the electrical connection box, Further, a plurality of fuses can be simultaneously mounted in the fuse housing portion.

2. Description of the Related Art Conventionally, a circuit that supplies power to each electrical component from a battery mounted on an automobile has been provided with a fuse to prevent the overcurrent from flowing and protect the circuit.
As such a fuse, Japanese Unexamined Patent Application Publication No. 2002-163974 (Patent Document 1) discloses a fuse 1 shown in FIG. The fuse 1 is provided with a fusing part 4 between an input terminal 2 and an output terminal 3 formed of a conductive metal plate, and the fusing part 4 is covered with a housing 5 made of an insulating resin. The terminal 3 and the fusing part 4 are all formed on the same plane.

However, in the fuse 1 provided in Patent Document 1, since the input terminal 2, the output terminal 3, and the fusing part 4 are all formed on the same plane and arranged in the left-right direction, the fuse 1 has a low profile. However, there is a problem that it can be lengthened in the left-right direction (continuous direction by the fusing part).
In addition, a large number of fuses are accommodated in parallel in the fuse accommodating part of the electrical junction box, but these fuses are mounted one by one in the fuse accommodating part, and there is a problem in that productivity is inferior due to the labor required. is there.

JP 2002-163974 A

The present invention has been made in view of the above problems, and a main object is to reduce the size of the fuse by improving the protruding direction of the terminal of the fuse.
Further, it is an object to be able to mount a large number of fuses in a single mounting process.

  In order to solve the above problems, the present invention provides a pair of terminals that are continuous at a fusing part, the terminals are refracted in a direction orthogonal to the continuous direction by the fusing part, and at least the fusing part is a housing made of an insulating resin. A fuse characterized by covering is provided.

  According to the above configuration, instead of providing the fuse terminal and the fusing part on the same plane as in the conventional example, the input terminal and the output terminal with respect to the continuous direction of the fusing part that continues the input terminal and the output terminal. Is refracted in the orthogonal direction, the length of the fuse in the continuous direction can be shortened.

  Specifically, the direction of the pair of terminals relative to the fusing part is the same direction, and the metal material forming the terminal and the fusing part is a U-shape, or the direction of the pair of terminals relative to the fusing part is the reverse direction It is preferable that the metal material that forms the terminal and the fusing part has a Z shape.

According to the said structure, when the metal material which forms the said terminal and a fusing part is made into U shape, since the input terminal and the output terminal are made to protrude in the same direction with respect to a fusing part, continuous fusing part The fuse can be downsized in the direction orthogonal to the direction.
In addition, when the metal material forming the fusing part with the terminal is Z-shaped, the input terminal and the output terminal on the internal circuit side of the electrical connection box connected to the fuse are arranged in a staggered manner as will be described later. The space between the connection portion of the fuse and the internal circuit of the electrical junction box can be saved.

The pair of terminals have a tab shape, and the housing has a T shape including a horizontal frame portion and a vertical frame portion, covers the fusing portion and is interposed between the pair of terminals. It is preferable that both ends of the vertical frame portion are exposed, and the tip of the terminal is positioned close to the tip of the vertical frame portion.
According to the said structure, since the input terminal, the output terminal, and the fusing part are provided in the substantially same height position, the height reduction of a fuse can also be achieved.

In addition, the fusing portion that connects the pair of terminals may have a shape that is bent and projected in an arc shape from one end of the terminals, and the pair of terminals may have a tab shape or a female terminal shape.
According to the above configuration, the fusing part is not provided at the same height position as the input terminal and the output terminal, but is provided at different height positions by projecting to one end of the input terminal and the output terminal. Can be provided at positions close to each other, and the fuse can be further miniaturized in the continuous direction of the fusing part.

Further, the present invention uses a fuse in which a pair of terminals protrudes in the opposite direction among the fuses, and houses a plurality of the fuses in a continuous state in a fuse housing part of an electrical connection box. Connected to the internal circuit side terminal protruding from the bottom wall,
The fuse housing state in the fuse housing portion is such that the input terminals on one side of the plurality of fuses and the output terminals on the other side are arranged in parallel, and the input terminals and output terminals on the internal circuit side are arranged in a staggered manner. A fuse connection structure is provided.

  According to the above configuration, since the input terminal and the output terminal on the internal circuit side of the electrical connection box connected to the terminal of the fuse are arranged in a zigzag manner, the fuse is connected to the fuse accommodating portion of the electrical connection box in a state where the fuses are close to each other. Can be accommodated, and the space for mounting the fuse can be reduced. Thereby, an electrical junction box can be reduced in size.

  The fuse housing is provided with a through hole at a position where it is not in contact with the fusing part and the terminal, and a plurality of through holes of the fuse are continuously penetrated by a fixing rod and integrated. It is preferable to accommodate in the fuse accommodating part of the said electrical-connection box.

Specifically, the through hole penetrates the horizontal shaft portion of the housing in parallel with the fusing portion, while the fixing rod is long as a bolt having a shaft portion, and the shaft portion is formed of a plurality of fuses. After passing through the through hole, the tip is preferably fastened with a nut and integrated. At that time, it is preferable that the end faces of the lateral frame portions of the fuses to be kept in contact with each other.
In this way, if a plurality of fuses are connected and fixed in advance with a single fixing rod, the plurality of fuses can be attached to the fuse housing portion of the electrical junction box in a single work process. Compared to installing one fuse at a time, the number of working steps can be greatly reduced.

  As described above, according to the present invention, since the input terminal and the output terminal are refracted in the orthogonal direction with respect to the continuous direction of the fusing part where the input terminal and the output terminal are continuous, in the continuous direction of the fusing part. The fuse can be reduced in size.

  In the fuse connection structure, if the input terminal and the output terminal on the internal circuit side of the electrical connection box connected to the fuse terminal are arranged in a staggered manner, the fuses are placed close to each other in the fuse housing portion of the electrical connection box. It can be accommodated in a continuous state, and the space for mounting the fuse can be reduced.

  Furthermore, if a plurality of fuses are connected and held in advance with a fixing rod, a plurality of fuses can be mounted in the fuse housing portion of the electrical junction box in a single mounting operation, so that the number of work steps can be reduced.

Embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment of the present invention, in which a fuse 10 is housed in a fuse housing portion 21 of an electrical connection box 20 mounted on an automobile and connected to an internal circuit of the electrical connection box 20. Is.

  The fuse body 11 of the fuse 10 is formed by punching a conductive metal plate into a required shape and bending it, and a pair of tab-shaped input terminals 12 and output terminals 13 are connected by a narrow fusing part 14. The input terminal 12 and the output terminal 13 are formed by being refracted in a direction orthogonal to the continuous direction X by the fusing part 14, and in this embodiment, the input terminal 12 and the output terminal 13 are opposite to the fusing part 14. As shown in FIG. 2A, the fuse body 11 has a Z-shape in plan view.

  The housing 15 of the fuse 10 is a T-shaped resin molded product including a horizontal frame portion 15a and a vertical frame portion 15b protruding downward from the center of the lower surface of the horizontal frame portion 15a. While covering the fusing part 14 of the main body 11, the input terminal 12 and the output terminal 13 are protruded from the side surface of the vertical frame part 15b, and the vertical frame part 15b is interposed between the input terminal 12 and the output terminal 13. . Further, the lower end 15b-1 of the vertical frame portion 15b and the lower ends 12a and 13a of the input terminal 12 and the output terminal 13 are brought close to each other and positioned at substantially the same height.

As shown in FIG. 4, the electrical junction box 20 in which the fuse 10 is mounted is provided with a fuse accommodating portion 21 that can accommodate a plurality of fuses in a continuous state on the upper surface of the case, and a bottom wall is provided in the fuse accommodating portion 21. A tuning fork-shaped input terminal 23 and an output terminal 24 provided at the front end of the bus bar 22 forming the internal circuit of the electrical connection box 20 are projected from the top. As shown in FIG. 5, the input terminal 23 and the output terminal 24 projecting into the fuse accommodating portion 21 are arranged in a straight line, and the input terminal 23 and the output terminal 24 are arranged in parallel. Arranged alternately in the direction to make a staggered arrangement.
Note that the case of the electrical junction box 20 is provided with a relay accommodating portion, a connector accommodating portion, and the like in addition to the fuse accommodating portion 21, but is not shown in FIG.

  The output terminals 13A, 13B, 13C,... Of the fuses 10A, 10B, 10C, and the input terminals 12A, 12B, 12C,... Are connected to the input terminal 23 and the output terminal 24 on the internal circuit side of the electrical connection box 20. When the fuse 10 is accommodated in the fuse accommodating portion 21 of the electrical connection box 20, the fuses 10A, 10B, 10C,... Are arranged in the fuse accommodating portion 21 in a continuous state. At this time, the input terminals 12 and the output terminals 13 of the fuse 10 are arranged in parallel.

According to the above configuration, since the input terminal 12 and the output terminal 13 are refracted in the orthogonal direction with respect to the continuous direction X of the fusing part 14 in which the input terminal 12 and the output terminal 13 of the fuse 10 are continuous, The fuse 10 can be miniaturized by shortening the length in the continuous direction X.
Further, the input terminal 12 and the output terminal 13 of the fuse 10 are protruded in the opposite direction from the fusing part 14, and the input terminal 23 and the output terminal 24 on the internal circuit side of the electrical connection box 20 connected to the terminal of the fuse 10 are staggered. Since it is arranged, the fuse 10 can be accommodated continuously in the fuse accommodating portion 21 of the electrical connection box 20 in a close state, and the mounting space for the fuse 10 can be reduced.

FIG. 6 shows a second embodiment of the present invention.
In the fuse 30 of this embodiment, the shape of the fuse main body 31 is different from that of the first embodiment. The input terminal 32 and the output terminal 33 are protruded from the fusing part 34 in the same direction, and the fuse main body 31 is viewed in plan view. It has a letter shape.

Even in this configuration, since the input terminal 32 and the output terminal 33 are refracted in the orthogonal direction with respect to the continuous direction X of the fusing part 34, the length of the fuse 30 in the continuous direction X can be shortened.
Furthermore, in this embodiment, since the input terminal 32 and the output terminal 33 are protruded from the fusing part 34 in the same direction, the fuse 30 is also provided in the direction orthogonal to the continuous direction X as compared with the fuse of the first embodiment. Can be shortened and reduced in size.
Since other configurations and operational effects are the same as those of the first embodiment, description thereof is omitted.

FIG. 7 shows a third embodiment of the present invention.
In the fuse of this embodiment, the shape of the fuse body 41 is different from that of the above embodiment.
Specifically, as shown in FIG. 7A, the lower right corner portion 42a of the tab-shaped input terminal 42 and the upper left corner portion 43a of the tab-shaped output terminal 43 are connected by a narrow linear fusing portion 44. The fuse body 41 is formed by punching from a conductive metal plate, and the melted portion 44 is bent into an arc shape in the length direction of the terminals 42 and 43. Therefore, as shown in FIG. 7B, the fuse body 41 after the bending process connects the upper ends of the input terminal 42 and the output terminal 43 with an arcuate fusing part 44, and the input terminal 42 and the output terminal 43 are blown out. The shape protrudes from the portion 44 in the opposite direction.
In the fuse of this embodiment, the fusing part 44 is covered with an insulating resin housing as in the above embodiment, but the illustration is omitted.

  According to the above configuration, the fusing part 44 is not provided at the same height position as the input terminal 42 and the output terminal 43, but is provided at a different height position by projecting to the upper end side of the input terminal 42 and the output terminal 43. The input terminal 42 and the output terminal 43 can be provided close to each other, and the fuse can be further miniaturized in the continuous direction X of the fusing part 44.

Moreover, in this embodiment, although the input terminal 42 and the output terminal 43 are made to protrude in the reverse direction from the fusing part 44, the input terminal 42 and the output terminal 43 are the same direction from the fusing part 44 like 2nd Embodiment. You may make it project.
Furthermore, in this embodiment, the input terminal 42 and the output terminal 43 are tab-shaped, but as shown in FIG. 8, the conductive metal plate is refracted into a required shape, and the input terminal 42 and the output terminal 43 are female terminal-shaped. It is good. At this time, the terminal on the internal circuit side of the electrical connection box connected to the female terminal-shaped input terminal 42 and the output terminal 43 has a tab shape.

9 and 10 show a fourth embodiment of the present invention.
In the fuse 50 of the present embodiment, a through hole 55c is formed in the horizontal frame portion 55a of the housing 55 in the longitudinal direction of the horizontal frame portion 55a in parallel with the fusing portion and without contact with the fusing portion and the input terminal and the output terminal. Provided.
The fixing rod 60 is penetrated from one side into each through hole 55c of the plurality of fuses 50A, 50B. The fixing rod 60 has a shape having a long screw shaft portion 60b in the head portion 60a. After the shaft portion 60b is continuously passed through the through hole 55c, the fixing rod 60 is formed in the horizontal frame portion 55a of the adjacent fuses 50A, 50B. The nut 61 is fastened to the screw shaft portion 60b in a state where the end faces are in contact with each other, and is integrally fixed.

  As shown in FIG. 10, the fuse accommodating portion of the electrical junction box corresponds to the input terminals 52 and the output terminals 53 of the plurality of fuses 50 (50A, 50B,...) Integrally connected and fixed by the fixing rod 60. At the position, the input terminal 23 and the output terminal 24 are arranged so as to protrude.

  When a plurality of fuses 50 that are integrally connected and fixed by the fixing rod 60 are attached to the fuse housing portion, the input terminals and connection terminals of these fuses 50 are simultaneously connected to the input terminals and connection terminals of the fuse housing portion. It is possible to reduce the number of mounting steps as compared with the case where the fuses are mounted one by one.

  In addition, this invention is not limited to the said embodiment, The various form within the claim of this invention is included.

It is a perspective view which shows the fuse of 1st Embodiment of this invention. The fuse of 1st Embodiment is shown, (A) is a top view, (B) is a front view, (C) is a left view. A fuse main body is shown, (A) is a perspective view, (B) is a top view. It is a schematic perspective view of the electrical junction box carrying a fuse. The connection structure of a fuse and the internal circuit of an electrical junction box is shown, (A) is a perspective view, (B) is a top view. It is a top view which shows the fuse of 2nd Embodiment. The fuse main body of 3rd Embodiment is shown, (A) is drawing which shows before the bending process of a fusing part, (B) is drawing which shows after the bending process of a fusing part. It is drawing which shows the modification of 3rd Embodiment. It is a perspective view which shows the fuse of 4th Embodiment. The fuse integrated by the fixing rod is shown, (A) is a perspective view, (B) is a plan view. It is drawing which shows a prior art example.

Explanation of symbols

10, 30, 50 Fuse 11, 31, 41 Fuse body 12, 32, 42, 52 Input terminal 13, 33, 43, 53 Output terminal 14, 34, 44 Fusing part 15, 55 Housing 15a, 55a Horizontal frame part 15b Vertical Frame portion 20 Electrical connection box 21 Fuse housing portion 23 Input terminal 24 on the internal circuit side of the electrical connection box Output terminal 55c on the internal circuit side of the electrical connection box Through hole 60 Fixing bar

Claims (6)

  A fuse characterized in that a pair of terminals are continuous at a fusing part, the terminal is refracted in a direction orthogonal to a continuous direction by the fusing part, and at least the fusing part is covered with a housing made of an insulating resin.   The metal material forming the terminal and the fusing part with the same direction as the pair of terminals with respect to the fusing part has a U shape, or the terminal and the fusing part with the direction of the pair of terminals with respect to the fusing part as the reverse direction. The fuse according to claim 1, wherein the metal material forming the Z has a Z shape.   The pair of terminals have a tab shape, and the housing has a T shape including a horizontal frame portion and a vertical frame portion, covers the fusing portion and is interposed between the pair of terminals. The fuse according to claim 1, wherein the fuse is exposed on both sides of the vertical frame portion, and the tip of the terminal is positioned close to the tip of the vertical frame portion.   3. The fusing part that connects the pair of terminals has a shape that is bent and projected in an arc shape from one end of the terminals, and the pair of terminals has a tab shape or a female terminal shape. Fuse described in. The fuse according to any one of claims 1 to 4, wherein a fuse having a pair of terminals projecting in opposite directions is used, and the plurality of fuses are continuously provided in a fuse housing portion of an electrical connection box. Is housed and connected to the internal circuit side terminal protruding from the bottom wall in the fuse housing portion,
The fuse housing state in the fuse housing portion is such that the input terminals on one side of the plurality of fuses and the output terminals on the other side are arranged in parallel, and the input terminals and output terminals on the internal circuit side are arranged in a staggered manner. Fuse connection structure characterized by having.   The fuse housing is provided with a through hole at a position where it is not in contact with the fusing part and the terminal, and a plurality of through holes of the fuse are continuously penetrated by a fixing rod and integrated. The fuse connection structure according to claim 5, wherein the fuse connection structure is housed in a fuse housing portion of the electrical connection box.

Images