JP2000030600A - Multipolar fuse element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multipolar fuse element capable of branch-feeding electric power and protecting circuits without separately requiring connecting lines to stacked circuit boards. SOLUTION: This element 1 is constituted of a set of branch circuit including one input terminal 2 and multiple output terminals 3, fuse melting sections 4 provided between the input terminal 2 and the output terminals 3, and a case 5. The input terminal 2 and the output terminals 3 are protruded in opposite directions to each other against the case 5. The input terminal 2 and the output terminals 3 are desirably protruded from the case 5 at the prescribed angle, preferably 90 deg., against the plane along the storage space storing the fuse melting sections 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-pole type fuse element.

[0002]

2. Description of the Related Art Conventionally, vehicles, especially automobiles, have been provided with a fuse between a battery and various electric components to prevent overcurrent, and a general fuse is disclosed in US Pat. No. 4,023,264. There is a form disclosed in this document.

In this method, a fuse blown portion is connected between the base ends of a pair of terminals facing each other, and is integrally formed by punching a long fuse material made of a single conductive plate so as to form an H shape as a whole. And is mounted on a housing having insulation properties.

In addition, by arranging a plurality of output terminals in parallel with an input terminal from one power supply side via a fusing portion, a circuit branch is taken into the configuration shown in FIG.
No. 0 is known (Japanese Patent Publication No. 61-1462).
No. 5). This configuration will be described.
Inside, a common link 22 is provided, and a plurality of fuse forming links 23 having a smaller cross-sectional area than the common link 22 are formed from one side of the common link 22. A common link 24 having a larger cross-sectional area than the fuse forming link 23 is formed on one side of the common link 22. Terminals 25 are joined to the tips of the fuse forming link 22 and the common link 24 by soldering or welding. The terminals 25 are arranged in parallel with each other and protrude from the case 21. The common links 22, 24 and the fuse forming link 23 are integrally formed by punching a fuse metal plate.

[0005]

In recent years, comfort and convenience have been demanded in automobiles, and as a result, electric systems of vehicles have been enlarged to meet this demand. Therefore, when power is supplied from a battery to a circuit constituting each electrical system, a fuse box is often provided collectively in an engine room or in a vehicle for easy maintenance. In addition, although fuse elements are used as described above to protect a large number of circuits to which power is supplied, stacking each circuit can place each circuit in a smaller area, and thus there is a demand for stacking. is there.

However, in the conventional multi-pole type fuse element as described above, both the input terminal and the output terminal are protruded in the same direction, so that power is supplied to a plurality of circuits provided on one circuit board. It is good to branch and supply, but when supplying power to other stacked circuit boards, it is necessary to prepare a separate connection line to supply power to other stacked circuit boards There is.
When the connection line is not used, it is necessary to provide a through-hole (or a gap) in a circuit board located in an upper layer in order to obtain connection with the fuse, and to protrude the connection terminal to the fuse connection surface.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to supply and branch electric power to each of the stacked circuit boards without having to separately provide a connection line. It is another object of the present invention to provide a multi-pole type fuse element capable of protecting a circuit.

[0008]

In order to achieve the above object, the invention according to claim 1 comprises a plurality of output terminals protruding in parallel in the same direction with respect to a case, and a plurality of output terminals with respect to the case. An input terminal protruding in a direction opposite to the output terminal, and a plurality of fuse blowing portions each having one end connected to the input terminal and the other end connected to each output terminal in the case. The gist of the present invention is a multi-pole type fuse element having:

According to a second aspect of the present invention, in the first aspect, the input terminal and the output terminal protrude from the case at a predetermined angle with respect to a plane along the storage space for storing the fuse blown portion. The gist is a multi-pole type fuse element.

A third aspect of the present invention is directed to the second aspect, wherein the multi-pole type fuse element has a predetermined angle of 90 °. (Operation) Therefore, according to the first aspect of the present invention, since the plurality of output terminals and the input terminals protrude in opposite directions, the plurality of output terminals and the input terminals are provided on the power line of one of the circuit boards between the stacked circuit boards. Female contact (or male contact)
Are connected to input terminals, and each output terminal is connected to a plurality of female contacts (or male contacts) of the other circuit board stacked.

According to the second aspect of the present invention, in addition to the function of the first aspect, the input terminal and the output terminal form a predetermined angle with respect to a plane along the storage space for storing the fuse blown portion. The case housing the fuse blown portion can be laid down. As a result, when the multi-pole type fuse element is arranged between the stacked circuit boards, the space between the circuit boards can be made smaller as the predetermined angle is deeper, and the arrangement interval of the stacked circuit boards can be made smaller.

According to the third aspect of the invention, in addition to the function of the second aspect, the space between the stacked circuit boards can be minimized.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the multi-pole type fuse element 1 has a set of branch circuits including one input terminal 2 and four output terminals 3, and includes an input terminal 2 and an output terminal 3. It has a fuse blowing section 4 and a case 5 provided therebetween.

The input terminal 2 is integrally protruded from the common link 6 and is bent at the base end thereof at right angles to the common link 6. In the common link 6,
On the side opposite to the input terminal 2, one end of each of four fuse blowing portions 4 is connected integrally at equal intervals. The fuse blowing portion 4 is formed in an inverted S-shape. The output terminal 3 is connected to the other end of each fuse blowing section 4. The output terminal 3 has the same width as the input terminal 2 and the same sectional area. The output terminal 3 is bent at its base end by 90 ° so as to face in the opposite direction to the input terminal 2, and the output terminals are arranged in parallel with each other.
Further, the input terminal 2 and the output terminal 3 have rigidity, and can be self-standing when only one of the input terminal 2 and the output terminal 3 is sandwiched between the female contacts of the circuit board.

The input terminal 2, the output terminal 3, the common link 6, and the fuse blowing portion 4 are integrally formed by punching a fuse metal plate made of a Zn alloy.
Further, the fuse blowout portion 3 is made narrower than the input terminal 2 so that the cross-sectional area is smaller than the input terminal 2 and the output terminal 3.
And the fuse blowout portions 3 have the same length. Therefore, the current interrupting capacities of the respective fuse blowing portions 4 are the same.

The case 5 is formed of a heat-resistant transparent resin in a flat shape. The case 5 has two divided bodies 5a and 5b, which are divided into two along a plane orthogonal to the thickness direction (in FIG. 2, the vertical direction of the paper surface) and face each other. Then, the inside of the case 5 (the divided bodies 5a, 5
On the inner surfaces opposing each other (b), four fuse storage grooves 7 as storage spaces defined by three partition walls 8 are formed in parallel with each other. In the case 5, a link fitting recess 9 is formed on the inner end side of the fuse housing groove 7. The link fitting recess 9 communicates with each of the fuse storage grooves 7.

In the case 5, the common link 6 is fitted in the link fitting groove 9, and the fuse blowout portion 4 is housed in each fuse housing groove 7. The base end of the output terminal 3 is fitted to the outer end of each fuse housing groove 7. At the outer end of the fuse accommodating groove 7, a retaining projection 10 is provided so as to protrude and is fitted into a through hole 11 provided at the base end of the output terminal 3 to prevent the output terminal 3 from being retained. I have. Then, as shown in FIG. 4, the input terminal 2 and the output terminal 3 are positioned with respect to a plane crossing the fuse accommodating groove 7 (in FIG. 4, a line A representing the overlapping surface of the divided bodies 5a and 5b). Angle (90 in this embodiment)
°).

Next, a method of using the multi-pole type fuse element 1 configured as described above will be described. FIG. 5 shows two circuit board storage boxes 13 and 14, and both circuit board storage boxes 13 and 14 have circuit boards 15 and 1 respectively.
6 are attached respectively. The two circuit board storage boxes 13 and 14 can be stacked one on top of the other. Hereinafter, the circuit board storage box 13 located on the upper side is referred to as an upper box, and the circuit board storage box 14 located on the lower side is referred to as a lower box.

The circuit board 15 of the upper box 13 is raised so that the upper board 1 is raised as shown in FIG.
3 are arranged at a predetermined distance from the lower surface of the side wall. The circuit board 16 of the lower box 14 is flush with the upper surface of the side wall of the lower box 14.

On the bottom surface of the circuit board 15 of the upper box 13, a female contact 17 for inserting the input terminal 2 of the multi-pole fuse element 1 is provided. Are electrically connected to a power supply line (not shown) formed at the same time. Also, 14 circuit boards 1 in the lower box
6 is provided with a plurality of female contacts 18 for sandwiching the output terminal 3 of the multipolar fuse element 1, and each female contact is electrically connected to a power supply line formed on a circuit board 16. I have.

The upper box 13 and the lower box 1
4, when the boxes 13 and 14 are stacked, the distance L between the boxes 13 and 14 and the circuit boards 15 and 16 is equal to the vertical length of the case 5 of the multipolar fuse element 1 (up and down in FIG. 4). Length) is set to be slightly longer than K.

When the multi-pole type fuse element 1 of the present embodiment is arranged between the boxes 13 and 14 stacked as described above, a predetermined position is previously set on the circuit board 16 of the lower box 14 as shown in FIG. The output terminal 3 of the multi-pole type fuse element 1 is brought into contact with the female contact 18 for connection of the output terminal provided in the above. Then, the multipolar fuse element 1
Becomes independent.

In this state, the upper box 13 is stacked on the lower box 14, and the input terminal of the self-standing multipolar fuse element 1 is inserted into the female contact 17 of the circuit board 15 of the upper box 13. Then, as shown in FIG. 6, the multipolar fuse element 1 is
It fits in the space formed between the circuit boards 15 and 16 of 3,14.

The operation and effect of the first embodiment configured as described above will now be described. (A) According to the first embodiment, a plurality of output terminals 3
And the input terminal 2 project in opposite directions,
Circuit board 1 of upper and lower boxes 13 and 14 stacked
In a state where the input terminal 2 and the output terminal 3 are connected to the circuit boards 5 and 16, they can be accommodated in the space formed between the circuit boards 15 and 16.

(B) The input terminal 2 and the output terminal 3 have rigidity. When only one of the input terminal 2 and the output terminal 3 is sandwiched between the female contacts of the circuit board, the terminal can be self-standing. did. By doing so, in this embodiment, when the output terminal 3 comes into contact with the female contact 18 of the circuit board 16, the multipolar fuse element 1 becomes independent. As a result, since the input terminal 2 on the opposite side is in a state of protruding in the opposite direction, when the circuit board 15 of the upper box 13 is subsequently stacked on the circuit board 16, On the other hand, the female contacts 17 of the circuit boards 15 to be stacked can be easily matched, and the connection of the circuit boards on the stacking side to the multi-pole type fuse element can be easily performed.

(C) Particularly, in this embodiment, FIG.
As shown in the figure, the input terminal 2 and the output terminal 3 are 90
° It is bent and projected vertically. And
Since the case 5 is formed in a flat shape and arranged so as to be parallel to the circuit boards 15 and 16, the space between the stacked circuit boards 15 and 16 can be minimized. As a result, it is possible to reduce the overall length of the boxes on which the circuit boards 15 and 16 are stacked.

(Second Embodiment) Next, a second embodiment will be described with reference to FIGS. In the following embodiments, the same or corresponding components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted, and different portions will be mainly described.

In the second embodiment, as shown in FIGS. 7 and 8, the input terminal 2 and the output terminal 3 are not bent, but protrude straight from the case 4 in the structure of the first embodiment. Where they are is different.

FIG. 9 shows the lower box 14.
Unlike the lower box 14 of the first embodiment, the circuit board 16 of the lower box 14 used in this embodiment is fixed at a position spaced downward from the upper surface of the side wall 14a. Although this lower box is not shown,
In the same manner as in the embodiment, it can be stacked with an upper box provided with a circuit board.

In this embodiment, as described above, the circuit board 16 of the lower box 14 is displaced downward from that of the first embodiment, so that most of the multipole type fuse 1 is placed in the lower portion. It can be stored in the box 14.

When the multi-pole type fuse element 1 according to the present embodiment is arranged between the upper and lower boxes stacked on each other as described above, as shown in FIG.
The multi-pole type fuse element 1 is connected to a female contact (not shown) for connecting an output terminal provided at a predetermined position on the circuit board 16 of FIG.
Output terminal 3 is pinched. Then, the multipolar fuse element 1 becomes independent.

In this state, the upper box (not shown) is stacked on the lower box 14 and the input terminal of the self-standing multipolar fuse element 1 is inserted into the female contact of the circuit board of the upper box. The power lines provided on the circuit boards of the upper and lower boxes are electrically connected by the multi-pole fuse element 1. Further, the multi-pole type fuse element 1 fits in a space formed between the circuit boards of the upper and lower boxes.

Therefore, in the second embodiment, the functions and effects of (A) and (B) except for the function and effect of (C) among the functions and effects of the first embodiment are similarly exhibited. Can be.

The embodiment of the present invention is not limited to the configuration of the above embodiment, but may be as follows. (A) In the first embodiment, the fuse blowing portion 4
In other words, by making the fuse blowing portion 3 narrower than the input terminal 2, the cross-sectional area is made smaller than that of the input terminal 2 and the output terminal 3, and the length of each fuse blowing portion 3 is the same. And the current interrupting capacity of each fuse blowing section 4 was the same. Instead of the fuse blown part,
Different width, thickness, that is, cross-sectional area, or length,
The current breaking capacity may be different.

(B) In each of the above embodiments, one set of branch circuits is formed. For example, in each of the above embodiments, a multipolar fuse element provided with two, three or more sets of branch circuits is provided. It may be.

(C) The number of output terminals connected to one input terminal is four in each of the above-described embodiments, but is not limited to this number. It may be three or five or more.

(D) In the above embodiments, the input terminal or the output terminal is a male terminal, but the multipole fuse side may be a female terminal and the circuit board side may be a male terminal. .

Next, technical ideas other than the inventions described in the claims that can be understood from the embodiment will be described together with their effects. (1) The multi-pole type fuse element according to claim 1, wherein the input terminal or the output terminal is self-supporting when inserted into the female contact of the circuit board. With this configuration, when the input terminal (or the output terminal) is inserted into and brought into contact with the female contact of the circuit board, the multi-pole type fuse element becomes independent. As a result, the output terminal (or input terminal) on the opposite side protrudes in the opposite direction. Therefore, when the next circuit board is subsequently stacked on the circuit board, the female contacts of the circuit board to be stacked can easily correspond to the protruding terminals, and the number of circuit boards on the stacking side can be increased. Connection to the pole type fuse element can be easily performed.

[0040]

As described in detail above, according to the first aspect of the present invention, power can be branched and supplied to each of the stacked circuit boards without the necessity of separately providing a connection line. Protection can be provided.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the input terminal and the output terminal form a predetermined angle with respect to a plane along the storage space for storing the fuse blown portion. The case housing the fuse blown portion can be laid down. As a result, when the multi-pole type fuse element is arranged between the stacked circuit boards, the space between the circuit boards can be made smaller as the predetermined angle is deeper, and the arrangement interval of the stacked circuit boards can be made smaller.

According to the third aspect of the invention, in addition to the effect of the second aspect, there is an effect that the space between the stacked circuit boards can be minimized.

[Brief description of the drawings]

FIG. 1 is a perspective view of a multipolar fuse element according to a first embodiment.

FIG. 2 is a front view of the same multi-pole type fuse element.

FIG. 3 is a sectional view of the multi-pole type fuse element.

FIG. 4 is a side view of the same multi-pole type fuse element.

FIG. 5 is a perspective view showing a use state of the multipolar fuse element.

FIG. 6 is a sectional view showing a state of use of the multipolar fuse element.

FIG. 7 is a perspective view of a multipolar fuse element according to the second embodiment.

FIG. 8 is a sectional view of the same.

FIG. 9 is a perspective view showing a use state of the multipolar fuse element.

FIG. 10 is a cross-sectional view of a conventional multipolar fuse element.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Multi-pole type fuse element, 2 ... Input terminal, 3 ... Output terminal, 4 ... Fuse fusing part, 5 ... Case, 6 ... Common link, 7 ... Fuse fusing part storage groove, 8 ... Partition wall.

Claims (3)

[Claims] A plurality of output terminals projecting in parallel to the case in the same direction, an input terminal projecting in a direction opposite to the output terminal with respect to the case, A multi-pole type fuse element, comprising: a plurality of fuse blowing portions each having one end connected to the input terminal and the other end connected to each output terminal. 2. The device according to claim 1, wherein the input terminal and the output terminal protrude from the case at a predetermined angle with respect to a plane along a storage space for storing the fuse blown portion. A multipolar fuse element as described. 3. The multi-pole type fuse element according to claim 2, wherein the predetermined angle is 90 °.