JP4687552B2 - Integrated fuse - Google Patents

Abstract

The device has a common switching circuit section (13) that connects with an input terminal section (12), where the device is formed of an electrically conductive metal plate. A set of narrow safety sections (14) diverges from the switching section, and a set of output terminal sections (16) connects with the respective safety sections. A standby connection termination section (15) branches in-front of the switching circuit section such that a terminal at an end of an electrical wire is connectable with the standby section, where the wire stands in connection with one of the output sections.

Description

  The present invention relates to an integrated fuse, and in particular, when a part of a blown portion in the integrated fuse is blown, the blown portion can be easily connected to a circuit so that emergency measures can be taken. is there.

Recently, an integrated fuse shown in FIG. 9 disclosed in Japanese Patent Application Laid-Open No. 2002-358863 is used in an electric junction box for automobiles.
The integrated fuse 1 is formed integrally with a bus bar 2 formed by pressing a metal plate having excellent conductivity, and has an input terminal portion 3 connected to the power supply side via the bus bar 2 and a tab shape. A plurality of output terminal portions 4 and a fusing portion (fuse element) 5 that connects the input terminal portion 3 and the output terminal portion 4 are integrally formed.

Specifically, the input terminal portion 3 of the bus bar 2 is formed by bending a terminal piece 3b at a right angle from a base portion 3a as a common circuit portion covering almost the entire width, and is formed in a thin line shape from the base portion 3a to be substantially S-shaped. A plurality of melted portions 5 that are bent into two are branched.
A resin mold portion 6 is formed in a region extending from the upper end portion of the plurality of output terminal portions 4 to the base portion of the terminal piece 3b of the input terminal portion 3 so as to sandwich the bus bar 2 from both the front and back surfaces. Only the part corresponding to is exposed so that it can be seen from the outside.

JP 2002-358863 A

In the integrated fuse 1 having the above-described configuration, since the input / output terminal portions 3 and 4 and the fusing portion 5 provided therebetween are integrally formed by one bus bar 2, any one fusing portion is blown. It is necessary to replace the entire integrated fuse 1. However, if the whole integrated fuse is replaced, not only will the cost be increased, but it will be necessary to reconnect all of the input / output terminal portions, which will also take time and effort.
In addition, in an integrated fuse equipped in a battery of an automobile, etc., if the fuse blows off at the destination and it becomes impossible to run, it may be necessary to take emergency measures so that it can run even temporarily, In the case of the integrated fuse as described above, it is difficult to travel unless all the integrated fuses are replaced, and there is a problem that the above-described measures cannot be taken.

  The present invention has been made in view of the above problems, and when a part of the fused part in the integrated fuse is blown, it is connected to the blown output terminal part without replacing the entire integrated fuse. It is an object of the present invention to provide an integrated fuse that can re-activate the equipment connected to the wire that has been used and can easily restore the function as a fuse.

In order to solve the above problems, the present invention provides one input terminal portion, a common circuit portion continuous to the input terminal portion, and a fusing portion as a plurality of narrow portions branched from the common circuit portion. An integrated fuse in which a plurality of output terminal portions connected to each fusing portion are integrally provided with a conductive metal plate,
Spare connection terminal portions branched from the common circuit portion are provided in parallel with the plurality of fusing portions, and each output terminal portion is provided with a bolt hole for fastening a bolt with a terminal of an electric wire terminal, and for the spare Bolt holes for fastening bolts are also provided in the connection terminal part,
The terminal of the electric wire terminal connected to the fused output terminal portion is fastened and fixed with a bolt to one end side of a spare terminal plate having bolt holes at both ends, and the other end of the spare terminal plate An integrated fuse is provided in which the side can be fastened and fixed to the spare connection terminal portion with a bolt .

  As described above, by providing a spare connection terminal portion branched from the common circuit portion, and connecting the terminal of the wire terminal connected to the fused output terminal portion, the entire integrated fuse can be replaced. However, it is possible to recover the electrical connection with the input terminal side that has been cut only by switching the terminal of the wire terminal to the connection terminal for spare, and the device connected to the wire terminal It can be activated again.

In addition, as described above, each output terminal portion is provided with a bolt hole for bolt fastening with a terminal of the electric wire terminal, and the spare connection terminal portion is also provided with a bolt hole for bolt fastening, The terminal of the electric wire terminal connected to the output terminal part in which the fusing part is fused is fastened and fixed to one end side of a spare terminal board having bolt holes at both ends, and the spare terminal board. the end side that are configured to be fastened in the spare connection terminal portion and the bolt.

According to the said structure, in order to fasten and fix the terminal of an electric wire terminal and each output terminal part with a volt | bolt, when a fusing part is blown out, it is connected to the blown out output terminal part only by releasing a volt | bolt. Only the terminal of the wire end that has been removed can be easily removed from the output terminal portion.
Moreover, according to the said structure, using the spare terminal board which provided the bolt hole at both ends, the one end side is bolt-fastened with the said connection terminal part for spares, and the electric wire terminal removed from the fused output terminal part Since the terminal can be slightly fastened in the lateral direction to the other end side of the spare terminal plate and bolted, the connection between the terminal of the wire terminal and the spare connection terminal portion can be easily performed.
That is, a terminal plate for a wire terminal is provided by interposing a spare terminal plate having bolt holes at both ends between the terminal of the wire terminal and the connecting terminal portion for spare, and fastening them with bolts. Can be easily and reasonably connected to each other and the spare terminal plate can be easily replaced.

And with the spare terminal plate to be interposed between the terminals and the spare connection terminal portion of the wire end, and a plate fuse provided with bolt holes at both ends. In particular, using a plate fuse having the same current-carrying capacity as the blown fused portion, one end of the plate fuse is fastened and fixed with a spare connection terminal portion and a bolt, and the wire terminal connected to the blown output terminal portion By simply connecting the terminal to the other end of the plate fuse and fastening and fixing it with a bolt, the function as a fuse can be completely restored without replacing the whole integrated fuse.

Also, if a sheet fuse with the same current carrying capacity as the blown melted part is not at hand at the time of fusing, a board fuse with a different current carrying capacity must be installed immediately, and then the same current flow as the blown fused part. It is preferable to replace the plate fuse with a capacity.
Furthermore, if the fuse is not available due to the fusing part being blown, the terminal board with bolt holes at both ends is temporarily attached as an emergency measure if the board fuse is not at hand. For the time being, it is possible to make it possible to run, and then replace it with a plate fuse having the same current-carrying capacity as the melted part melted by a dealer or the like.
A spare plate fuse may be attached to a fuse box or the like.

The spare connection terminal portion is formed by branching the bus bar from the common circuit portion as in the case of the other plurality of narrow fusing portions, but at least one spare connection terminal portion for every ten fusing portions. It is preferable to provide one spare connection terminal portion for every 4 to 6 fusing portions.
Moreover, the terminal of the electric wire terminal connected to the output terminal portion is preferably an LA terminal having a bolt hole or a crimp terminal.
Furthermore, if the end of the plate fuse on the side connected to the electric wire end is formed in a tab shape, the connector of the electric wire end can be connected.

  As described above, according to the present invention, the spare connection terminal portion branched from the common circuit portion is provided so that the wire terminal connected to the fused output terminal portion can be connected. Even without replacing the whole body fuse, it is possible to recover the electrical connection with the disconnected input terminal by simply connecting the terminal of the wire terminal to the spare connection terminal portion, and connecting to the wire terminal. It is possible to operate the device that is being used again.

In addition, as described above, each output terminal part of the integrated fuse is provided with a bolt hole for fastening the bolt with the terminal of the electric wire terminal, so that when the fusing part is blown, only the bolt is released. Only the terminal of the wire terminal connected to the blown out output terminal part can be easily removed from the output terminal part.
Further, a bolt hole for fastening the bolt is provided in the spare connection terminal part, and a spare terminal plate having bolt holes at both ends is provided between the terminal of the removed electric wire terminal and the spare connection terminal part. By interposing them, each of them can be fastened and fixed with bolts, so that the connection between the terminal of the electric wire terminal and the spare connection terminal can be performed easily and easily, and the replacement of the spare terminal plate is also possible. It can be done easily.

  In particular, a plate fuse having the same current-carrying capacity as that of the blown portion as the spare terminal plate is used, and one end side of the plate fuse is fastened and fixed with a spare connection terminal portion and a bolt, and the blown out output terminal portion and By simply connecting the terminal of the connected wire terminal to the other end of the plate fuse and fastening and fixing it with a bolt, the function as a fuse can be completely restored without replacing the entire integrated fuse.

Embodiments of the present invention will be described with reference to the drawings.
1 to 7 show an integrated fuse 10 according to a first embodiment of the present invention, which is housed in a fuse box 18 attached to a battery B of an automobile.
The integrated fuse 10 is provided with a bus bar 11 formed by press punching a conductive metal plate. An input terminal portion 12 connected to a power supply post P of the battery B, and an end portion of the input terminal portion 12 A common circuit part 13 bent at a right angle and connected to the input terminal part 12, six fusing parts 14 branched from the common circuit part 13 and arranged in parallel as shown in the figure, and two spare connection terminals The bus bar 11 integrally forms a portion 15 and six tab-shaped output terminal portions 16 connected to the fusing portions 14. Each of the output terminal portions 16 is provided with a bolt hole 16a so that it can be bolted to the LA terminal 20 of the wire terminal connected to each device.

  Each fusing part 14 made of a fusible body is formed in a shape that is narrow and bent in a substantially S shape. In this embodiment, one spare connection terminal 15 is provided for every three fusing parts (14). In FIG. 1, one of the two spare connection terminal parts 15 is It is provided between the third and fourth fusing parts 14 from the left, and another spare connection terminal part 15 is provided on the right side of the sixth fusing part 14 from the left. Further, each spare connection terminal portion 15 is also provided with a bolt hole 15a for fastening the bolt.

Further, in the bus bar 11 described above, as shown in FIG. 2, the bus bar 11 is sandwiched from both the front and back surfaces in the region from the base portion of the input terminal portion 12 to the upper end portion of the output terminal portion 16 to insulate such as epoxy resin. The resin mold part 17 made of a conductive resin is formed, but the fusing parts 14 and the spare connection terminal parts 15 are exposed to the outside.
In this embodiment, the bus bar 11 is resin-molded, but both the front and back surfaces of the bus bar may be sandwiched between upper and lower housings.
The integrated fuse 10 as described above is housed in the fuse box 18 and, as shown in FIG. 3, the LA terminal 20 and the output terminal portion 16 of the wire terminal connected to the device are fastened and fixed with the bolt B, and then the fuse cover 19 covers the integrated fuse 10.

Next, how to deal with the case where any one of the fusing parts 14 of the integrated fuse 10 is blown will be described.
For example, when the leftmost fusing part 14 shown in FIG. 3 is blown, first, the bolt B that has fastened and fixed the fusing output terminal part 16 and the LA terminal 20 of the electric wire terminal is released to Remove the LA terminal 20 of the wire terminal.
Next, as shown in FIG. 6, a plate fuse 21 having bolt holes 21a and 21b at both ends and having the same current-carrying capacity as the melted portion 14 is prepared. As shown in FIG. One end side (21a side) is connected to the spare connection terminal portion 15 close to the blown melted portion 14 (specifically, a spare connection provided between the third and fourth blown portions 14 from the left). The terminal portion 15) and the bolt B are fastened and fixed, and the LA terminal 20 of the removed electric wire end is fastened and fixed to the other end side (21b side) of the plate fuse 21 with the bolt B.

By the above method, it is possible to restore the electrical connection with the disconnected input terminal portion 12 side, it is possible to operate the device connected to the electric wire terminal again, and the function as a fuse is completely Can be revived.
If there is no plate fuse having the same current-carrying capacity as that of the blown melted portion, a plate fuse having a different capacity may be temporarily attached and later replaced with a plate fuse having the optimum capacity.

  As described above, the spare connection terminal portion 15 branched from the common circuit portion 13 is provided, and the LA terminal 20 of the wire terminal connected to the melted output terminal portion 16 can be connected, so that it is integrated. Even if the entire fuse 10 is not replaced, it is possible to restore the electrical connection with the input terminal portion 12 that has been cut by simply connecting the LA terminal 20 of the electric wire terminal to the spare connection terminal portion 15 side. It becomes possible to operate the equipment connected to the electric wire terminal again.

In particular, as described above, the plate terminal 21 provided with the bolt holes 15a for fastening the bolts in the spare connection terminal portion 15 and the bolt holes 21a and 21b at both ends is connected to the LA terminal 20 of the removed wire terminal. And the spare connection terminal 15 so that each can be fastened and fixed with bolts, so that the function as a fuse can be restored without replacing the entire integrated fuse 10. The connection between the LA terminal 20 of the electric wire terminal and the spare connection terminal portion 15 can be easily performed without difficulty, and the plate fuse 21 can be easily replaced.
Further, by using the plate fuse 21 having the same current-carrying capacity as the blown portion 14 that has been blown, the function as the fuse can be completely restored, and there is no need to replace the plate fuse later.

In the second embodiment, instead of the spare connection terminal portion 15 in the first embodiment, as shown in FIG. 8, bolt holes 22 a and 22 b are provided at both ends in advance on a bus bar branched from the common circuit portion 13. The plate fuse 22 was fastened and fixed with bolts B, and this was the same as in the first embodiment except that this was used as a spare connection terminal portion 23.
That is, in the spare connection terminal portion 23 in the second embodiment, the plate fuse 22 having bolt holes 22a and 22b provided at both ends is used as a fusing portion, and one end side (22a side) of the plate fuse 22 is branched from the common circuit portion 13. The bus bar is fastened and fixed with bolts B, and the other end side (22b side) of the plate fuse 22 is used as an output section.

The energizing capacity of the plate fuse 22 to be attached as the fusing part of the spare connection terminal part 23 is preferably equal to the maximum energizing capacity of the plurality of fusing parts 14 of the integrated fuse.
Therefore, when one of the fusing portions 14 of the integrated fuse is blown, the other end side (output portion) of the plate fuse 22 having the maximum current carrying capacity that is attached in advance as the fusing portion of the spare connection terminal portion 23. In addition, when the terminal of the electric wire terminal connected to the fused output terminal is fastened with bolts as an emergency measure, and then the energization capacity of the plate fuse 22 is larger than the energization capacity of the melted portion 14 that has been fused. May be replaced with a plate fuse having a current-carrying capacity equal to the current-carrying capacity of the fused part 14 that has been blown.

  According to the above-described configuration, either one of the pair of plate fuses (fused portions) 22 branched from the common circuit portion 13 and the spare connection terminal portion 23 including the output portion at the end thereof is provided in advance. When the fusing part 14 is blown, the LA terminal 20 of the electric wire terminal connected to the blown output terminal part 16 is simply connected to the output part of the spare connection terminal part 23, thereby functioning as a fuse. It can be revived and reconnection is very easy.

In the reference third embodiment, like the other fused parts of the integrated fuse, except that the fused part branched from the common circuit part and the output part are integrally formed with the bus bar to form the spare connection terminal part. Was the same as in the second embodiment.

  Also by the above configuration, by providing a spare connection terminal part consisting of a pair of fusing parts and output parts branched from the common circuit part in advance, when any fusing part is blown out, it is blown out. By simply switching the LA terminal of the wire terminal that was connected to the output terminal part to the output part of the spare connection terminal part, the function as a fuse can be restored and the connection can be made very easily. it can.

It is a perspective view of the bus bar of the integrated fuse which concerns on 1st embodiment of this invention. It is a front view of the integrated fuse which concerns on 1st embodiment of this invention. It is the schematic which shows a state before an integrated fuse is accommodated in a fuse box and a fuse cover is attached. It is a front view of a fuse box. It is a side view of the state which attached the fuse box to the battery. It is the schematic of a plate fuse. It is the schematic which shows the state which connected the terminal of the electric wire terminal connected to the fused output terminal part. It is the schematic which shows the state before the integrated fuse which concerns on 2nd embodiment is accommodated in a fuse box, and a fuse cover is mounted | worn. It is drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Integrated fuse 11 Bus bar 12 Input terminal part 13 Common circuit part 14 Fusing part 15, 23 Spare connection terminal part 15a Bolt hole 16 Output terminal part 16a Bolt hole 17 Resin mold part 18 Fuse box 19 Fuse cover 20 LA terminal 21, 22 Plate fuse 21a, 21b, 22a, 22b Bolt hole

Claims (1)

One input terminal portion, a common circuit portion that is continuous to the input terminal portion, a fusing portion that is a plurality of narrow portions branched from the common circuit portion, and a plurality of output terminals that are continuous to each fusing portion An integrated fuse in which the part is integrally provided with a conductive metal plate,
Spare connection terminal portions branched from the common circuit portion are provided in parallel with the plurality of fusing portions, and each output terminal portion is provided with a bolt hole for fastening a bolt with a terminal of an electric wire terminal, and for the spare Bolt holes for fastening bolts are also provided in the connection terminal part,
The terminal of the electric wire terminal connected to the fused output terminal portion is fastened and fixed with a bolt to one end side of a spare terminal plate having bolt holes at both ends, and the other end of the spare terminal plate An integrated fuse characterized in that the side can be fastened and fixed to the spare connection terminal portion with a bolt .

Images