JPH06150805A - Fuse box - Google Patents

Abstract

PURPOSE:To reduce size and weight of a fuse box so that it can be assembled easily by forming a plurality of branch parts on the substrate of the fuse and forming fuse attachment holes in the branch parts. CONSTITUTION:In a fuse box 30, a plurality of branch parts 13 are branched from the base 12 of a substrate 11. The left ends of the branch parts 13a-13f are made a branch part for electric power supply terminals and the others are made a branch part for output terminals. Fuse attachment holes 32 in which respective branches 13a-13f of the fuse 10 are removably inserted are formed. A terminal insertion hole is formed in each fuse attachment hole 32 and terminals pressure attached to power supply wires and terminals pressure attached to output electric wires are connected to an electric power supply terminal 14a and output terminals 14b-14f formed in respective branch parts 13a-13f.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuse box equipped with a plurality of fuses incorporated in a wire harness for an automobile or the like, and more particularly to a fuse box which can be made compact and lightweight.

[0002]

2. Description of the Related Art Usually, a fuse incorporated in a wire harness for an automobile is provided for each circuit of each electric component and mounted in a fuse box. Figure 8
Shows an example of the fuse box, and a plurality of fuse mounting holes 2 ... Is formed in the fuse box 1, and a pair of terminals 4 of a so-called blade type fuse 3 ... However, it is designed to be plugged in from above. By the way, in the case of fuses of electric components generally installed in vehicles such as automobiles, power supplies for the electric components are “B”, “ACC”, and “IG”.
There are three modes, and a predetermined number of fuses are arranged for each of these power supply modes. In the fuse box 1, as shown in FIG. 9, the fuses 3 are fuses 3A ... (B), 3B ...
C ... (IG) are arranged in a line, and one terminal 4 in each of the fuses 3A, 3B, and 3C of these three modes is connected to each terminal 5a connected from below the fuse box 1 by a chain bar 6. The electric wire 5 for power supply is connected through. Then, the electric wire 7 for output is connected to the other terminal 4 of the fuses 3A ... 3B ... 3C ... from below the fuse box 1 through the terminal 7a.

[0003]

The above-mentioned blade-type fuses 3 ... Are provided for each circuit of each electric component, and include the fusing element corresponding to the rated current, the power source side and the output side. Since the structure having the terminals 4 and 4 is required, the size of the fuse 3 itself is limited to some extent, and further miniaturization is impossible. And in recent years, vehicle users have been
In many cases, the user installs various non-standard optional electrical components such as in-vehicle facsimiles, communication devices such as telephones, comfort equipments such as TVs and navigation systems, etc., in which case the power is usually taken from the cigarette lighter. It will be. However, taking power from the optional electrical components in this way has problems in terms of overcurrent protection and the safety of the wiring itself. To avoid this, either increase the number of the fuses 3 or You will have to provide a separate fuse box. Therefore, the size and weight of the fuse box 1 cannot be reduced, and the installation space for the fuse box 1 becomes difficult. Further, since it is necessary to provide one fuse 3 for each circuit of each electric component, and the number of parts is increased, there is a disadvantage that the assembly is laborious and the cost thereof is high.

The present invention has been made in view of the above circumstances, and provides a fuse box which can be reduced in size and weight, can be easily assembled, can reduce its cost, and can maintain its safety. The purpose is to do.

[0005]

DISCLOSURE OF THE INVENTION The present invention is a fuse box in which a fuse made in order to achieve the above object is mounted, and the fuse has a base portion and a plurality of branch portions branched from the base portion. And a power supply terminal is formed in the power supply terminal branching portion on at least one surface of both surfaces of the substrate in which one of these branching portions is a power supply terminal branching portion and the other is an output terminal branching portion, A base circuit is formed from the power supply terminal to the base, and output terminals are respectively formed from the base circuit to each of the output terminal branches through a fuse circuit that is blown by the passage of a current of a predetermined value or more. The branch portions of the fuse are inserted to form the fuse mounting holes that are detachably mounted, and the fuse mounting holes communicate with the fuse mounting holes and are formed in the branch portions. Is characterized in that the formation of the terminal insertion holes for connecting the power supply terminals and crimped to the power supply wire to said output terminal the terminal and crimped to the output wires are terminals, respectively.

[0006]

According to the fuse box of the present invention, each branch portion of the fuse formed in the substrate type is inserted into the fuse mounting hole to be mounted, and the terminal crimped to the power supply wire from the terminal insertion hole to the power terminal. , Connect the terminals crimped to the output wire to the output terminals. Since the board-type fuse has multiple output terminals branching from one power supply terminal, the number of fuses to be incorporated in the circuits of a plurality of electrical components is small, and the fuse itself is thinly formed in the board-type. Since the fuse box of the present invention to which this board-type fuse is attached can be miniaturized and reduced in weight, and the assembly work can be facilitated. The number of points is reduced and parts management is facilitated, which reduces costs. Further, since it is possible to incorporate a large number of fuses, it is possible to cope with an increase in the number of electrical components, and it is possible to protect overcurrent and maintain the safety of wiring.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 30 in FIGS. 1 to 3 denotes a fuse box of the embodiment, and reference numeral 10 denotes a substrate type fuse mounted in the fuse box 30.

First, the substrate type fuse 10 will be described. The substrate type fuse 10 has an outer shape formed by a substrate 11 as shown in FIG. The substrate 11 is
A thin plate-like member made of an insulating material having high heat resistance (holo, ceramic, alumina, etc.), which is suitable for being installed in a vehicle such as an automobile, and a rectangular base 12,
The base 12 has a substantially comb shape in which a plurality of branch portions 13 branching from one of a pair of end edges extending in the longitudinal direction are integrally formed. In this case, the branch portion 13 is the base portion 12
6 are formed at equal intervals from each other in the longitudinal direction from both ends in the longitudinal direction of the branch parts 13a to 13f.
Extends a predetermined length perpendicular to the longitudinal direction of the base 12. Of these branch portions 13a to 13f, the leftmost one in FIG. 4 is a power terminal branch portion, and the others are output terminal branch portions.

A base circuit 14 is formed on the surface 11a of the substrate 11 from the power supply terminal branch 13a to the base 12. The base circuit 14 extends from the tip of the power supply terminal branch 13a to a position near the end of the base 12 opposite to the side where the power supply terminal branch 13a is formed. A portion of the base circuit 14 formed on the power supply terminal branch portion 13a serves as a power supply terminal 14a to which a power supply is connected. Then, from the base circuit 14, the output terminal branch unit 1
Output terminals 14b to 14f are formed via fuse portion circuits 15b to 15f, which are blown by currents of a predetermined value or more, for 3b to 13f. The width, thickness, length, and shape of the fuse unit circuits 15b to 15f are set so as to exert a fuse function in response to currents according to various electrical components connected to the output terminals 14b to 14f. . The base circuit 14, the power supply terminal 14a, and the output terminals 14b to 14 formed on the surface 11a of the substrate 11.
The patterns of f and the fuse unit circuits 15b to 15f can be integrally formed by, for example, print printing, etching treatment, or the like.

The substrate type fuse 1 in this embodiment is also used.
There are two types of 0 shown by reference numerals 10A and 10B. One substrate type fuse 10A is a double-sided type in which the circuit pattern is formed on both sides of the substrate 11, and the other substrate type fuse 10B has the circuit pattern in the substrate 11 It is a single-sided type that is formed on only one side.

Next, the fuse box 30 will be described. The fuse box 30 is formed in the shape of a rectangular parallelepiped by an insulating material such as resin, and the upper plate portion 31 facing upward has the fuse 10 of the substrate type. Terminal 1
4a to 14f formed branch portion 13 (13a to 13
f) is inserted and a plurality of rectangular fuse mounting holes 32 ... Are removably mounted. In this case, the fuse mounting holes 32 are arranged in two rows in total of six in the long side direction of the upper plate portion 31, and the longitudinal direction of the fuse mounting holes 32 is formed along the long side direction of the upper plate portion 31. . Here, in FIG. 2, the upper fuse mounting hole row is 33 and the lower fuse mounting hole row is 3
4, and the fuse mounting holes 32 ... 33a to 33f and 34a to 34f from the left side in FIG.

The inside of the fuse box 30 has an upper plate 3
Although the bottom side facing 1 is open,
A plurality of terminal insertion holes 36 ... Are formed by the partition plate 35 formed in a grid pattern. In this case, the terminal insertion hole 36 ...
Are formed in a total of 24 rows, 6 rows in the long side direction and 4 rows in the short side direction of the fuse box 30. 3 in FIG.
The respective row of terminal insertion holes arranged in order are referred to as terminal insertion hole rows 37 to 40 in order from above, and the terminal insertion holes 36 ... Of each of these rows 37 to 40 are designated 37a to 37f, 38a to 38f, 39a.
39f, 40a to 40f, the fuse mounting hole rows 33, 34 are arranged between the first and second terminal insertion hole rows 37, 38 and the third and fourth terminal insertion hole rows, respectively. . Then, the fuse mounting holes 33a to 33f of the fuse mounting hole row 33 have the upper and lower terminal insertion holes 37, respectively.
a-37f, 38a-38f, respectively,
In addition, the fuse mounting holes 34 a to 34 of the terminal insertion hole row 34
f is the upper and lower cord mounting holes 39a to 39f, 40a to
40f, respectively.

Terminal insertion holes 37a to 37f, 38a to 38
The terminals 41 are inserted into f, 39a to 39f, and 40a to 40f. As shown in FIGS. 5 and 6, this terminal 41 is generally an FPC in which a crimp portion 41b to the electric wire and an elastic piece 41c are formed at both ends of a housing 41a.
Used in (flexible printed circuit board), the elastic pieces 41c of the terminal 41 inserted into the terminal insertion holes 37a to 37f and the terminal insertion holes 38a to 38f are inserted into the terminal insertion holes 39a to 39f and the terminal insertion holes 40a to 40f. The inserted elastic pieces 41c are supported by the lance 42 and the partition plate 35 formed inside the terminal insertion holes 36 in a state of facing each other, and are locked so as not to fall off in the vicinity of the fuse mounting hole 32. . Then, the fuse mounting hole 32
The branch portions 13 of the board-type fuses 10A and 10B inserted from above are inserted between the opposing elastic pieces 41c so that the state is maintained and can be pulled out. The terminals 14 a to 14 f are in contact with the terminal 41 when the branch portion 13 is sandwiched between the opposing elastic pieces 41 c.

In the case of this embodiment, the terminal insertion holes 37a, 38
The power supply wire 43 is crimped to the crimp portion 41b of the terminal 41 inserted in the terminals a and 40a, and the terminal insertion holes 37b to 37f,
38b-38f, terminal 41 inserted in 40b-40f
The output electric wires 44 are crimped to the crimping portions 41b.

According to the fuse box 30 having the above construction, the fuse mounting holes 33a to 3a of the fuse mounting hole row 33 are formed.
3f is inserted into each branch portion 13a to 13f of the double-sided board type fuse 10A in correspondence with the power source side, and the fuse mounting holes 34a to 34f of the fuse mounting hole row 34 are also made to correspond to the power source side in the single-sided type. Board type fuse 10
The respective branch portions 13a to 13f of B are inserted and the respective terminals 14a to 14f of the respective substrate fuses 10A and 10B are brought into contact with the respective terminals 41. In this case, the double-sided board type fuse 10A has two systems, and the single-sided board type fuse 1
A current of one system flows in 0B, and these three systems in total can be made to correspond to the three modes of "B", "ACC", and "IG" of the power source of the automobile. Then, when these power sources are turned on, the board type fuses 10A,
Current is supplied to various electrical components from the output wire 44 via the power supply terminal 14a of 10B, the base circuit 14, the fuse circuits 15b to 15f, and the output terminals 14b to 14f. Here, when the current flowing from the power supply wire 43 and reaching each of the fuse unit circuits 15b to 15f becomes equal to or larger than the set current value of the fuse unit circuits 15b to 15f, the fuse unit circuits 15b to 15f are melted and the electrical equipment is disconnected. Overcurrent supply to the product is prevented.

Now, the fuse box 3 of the above-mentioned embodiment.
According to 0, a double-sided board type fuse 10A outputs five outputs from two power sources in total, and a single-sided board type fuse 10B outputs five outputs from one power source. Therefore, the number of fuses to be incorporated into the circuits of a plurality of electrical components can be small, and the fuses themselves can be made compact and lightweight. Therefore, these substrate type fuses 1
The fuse box 30 to which the 0A and 10B are mounted can be reduced in size and weight, the number of parts can be reduced, the parts can be easily managed, and the cost can be reduced.

FIG. 7 shows a comparative example of the size of the conventional fuse 3 shown in FIG. 8 and the size of the substrate type fuse 10 of the present embodiment. The distances P1 and P2 between the fuses and the direction of this distance are shown. Both the widths T1 and T2 are the substrate type fuse 10.
It is obvious that the fuse box 30 of the present embodiment in which the board-type fuse 10 is mounted can be greatly downsized. If circuit patterns are formed on both surfaces of the substrate 11 as in the double-sided board type fuse 10A, the size and weight of the fuse are further promoted and the assembling work into the fuse box 30 is facilitated. Further, the cost can be reduced. Further, even if the circuit patterns are formed on both surfaces of the board 11 to add the fuse section circuits 15b to 15f or the board type fuse 10 is newly incorporated, the fuse box does not become large in size, so that the number of electric components is increased. In addition to being able to deal with this, it becomes possible to protect overcurrent and maintain the safety of wiring.

Further, in the present embodiment, the terminal 41 which is inserted into the terminal insertion hole 36 and comes into contact with the terminals 14a to 14f of the fuse 10 is the terminal for the FPC as described above, and as described above, the elastic piece 41c. By facing each other and sandwiching the branch portion 13 of the double-sided board type fuse 10A between the elastic pieces 41c, and mounting the double-sided board type fuse 10A easily. it can.

In the above embodiment, two types of substrate type fuses 10A and 10B are mounted on both sides, one side, but depending on the number of circuits of the electrical equipment to be connected, for example, two fuses are mounted. Both can be double-sided or single-sided. Further, the number of branch portions 13 in the board-type fuses 10A and 10B, or the number of fuse mounting holes 32, and terminal insertion holes 36 formed in the fuse box 30 are arbitrary. Also, the substrate 1
1 has been described above as being made of a heat insulating material such as holo, ceramic, or alumina, which has a high heat resistance suitable for being installed in a vehicle such as an automobile, but when high heat resistance is not particularly required, a liquid crystal It may be formed of polymer, glass epoxy or the like.

[0020]

As described above, according to the fuse box of the present invention, the fuse box is mounted with the fuse, and the fuse has a base portion and a plurality of branch portions branching from the base portion. However, a power supply terminal is formed in the power supply terminal branching portion on at least one surface of both surfaces of the substrate in which one of these branching portions is the power supply terminal branching portion and the other is the output terminal branching portion. A base circuit is formed from the power supply terminal to the base, and the output circuit is formed from the base circuit to each of the output terminal branches through a fuse circuit that is blown by the passage of a current of a predetermined value or more. And the fuse mounting holes into which the branch portions of the fuse are inserted and which are detachably mounted are formed, and the fuse connecting holes communicate with the fuse mounting holes to form the branch portions. Terminal insertion holes for connecting the terminal crimped to the power supply wire and the terminal crimped to the output wire to the power supply terminal and the output terminal formed in Since the board-type fuse to be mounted has a configuration in which a plurality of output terminals are branched from one power supply terminal, the number of fuses to be incorporated in the circuits of a plurality of electrical components can be small and the fuse itself is small. And weight reduction,
Therefore, the size and weight of the fuse box itself can be reduced, the number of parts can be reduced, the assembling work and the parts management can be facilitated, and the cost can be reduced. Further, since it is possible to incorporate a large number of fuses, it is possible to cope with an increase in the number of electrical components, and it is possible to protect overcurrent and maintain the safety of wiring.

[Brief description of drawings]

FIG. 1 is a perspective view of a fuse box according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a bottom view of the same.

FIG. 4 is a front view of a substrate type fuse.

FIG. 5 is a sectional side view showing a state in which a terminal is inserted into a terminal insertion hole of a fuse box.

FIG. 6 is a perspective view of a terminal.

FIG. 7 is a perspective view showing a comparative example of the sizes of the substrate type fuse of the embodiment and the conventional fuse.

FIG. 8 is a perspective view of a conventional fuse and a fuse box in which the fuse is mounted.

9 is a bottom view of the fuse box shown in FIG.

[Explanation of symbols]

10 ... Fuse, 11 ... Substrate, 11a ... Substrate surface, 1
2 ... Base, 13 ... Branch, 13a ... Power terminal branch,
13b to 13f ... Branch for output terminal, 14 ... Base circuit,
14a ... Power supply terminal, 14b to 14f ... Output terminal, 15b
~ 15f ... fuse circuit, 30 ... fuse box,
32 ... Fuse mounting hole, 36 ... Terminal insertion hole, 43 ... Power wire, 44 ... Output wire

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Kijima 1-5-1 Kiba, Koto-ku, Tokyo Inside Fujikura Ltd.

Claims (1)

[Claims] 1. A fuse box (30) in which a fuse (10) is mounted, wherein the fuse (10) comprises a base (12) and a plurality of branch parts (13) branched from the base (12). And at least one of both surfaces of the substrate (11) having one of these branch portions (13) as a power terminal branch portion (13a) and the other as an output terminal branch portion (13b to 13f). A power supply terminal (14a) is formed on the power supply terminal branch (13a) with respect to the surface (11a), and a base circuit (14) is formed from the power supply terminal (14a) to the base (12). From (14) to the output terminal branching portions (13b to 13f), output terminals (14b to 14f) via fuse portion circuits (15b to 15f) that are blown by the passage of a current of a predetermined value or more.
f) are formed respectively, and the fuse mounting holes (32) into which the respective branch portions (13) of the fuse (10) are inserted and are detachably mounted are formed, and these fuse mounting holes are formed. (3
2) and the power supply terminal (14a) and the output terminal (14b-1) formed in each said branch part (13).
4f), the terminal (4) crimped to the power supply wire (43)
1) and the terminal (4) crimped to the output electric wire (44)
1. A fuse box, characterized in that terminal insertion holes (36) for connecting the respective 1) are formed.