JP3625114B2 - Fuse box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a fuse box that is arranged, for example, between a vehicle battery and an electrical component of an automobile and blocks abnormal current between the battery and the electrical component.
[0002]
[Prior art]
As this type of fuse box, for example, there is a structure as shown in FIGS. FIG. 5 is a longitudinal sectional view of a conventional fuse box, and FIG. 6 is a bottom view seen from the arrow F in FIG. In FIG. 6, the wires, the connection terminals connected to the wires, and the like are omitted for the sake of simplicity.
The fuse box 70 has, on the upper surface of the insulating housing 71, a plurality (two in the drawing) of storage portions 73, 73 for large current fusible links, and a storage portion 75 for a fusible link having a medium current or less. Are arranged side by side. Then, a screw-tight type fusible link 30 can be inserted into the large current storage units 73, 73, and an insertion type fusible link 35 can be inserted into the medium current storage unit 75. Has been made.
[0003]
On the other hand, one bus bar 77 and a plurality (four in the drawing) of nuts 79 (see FIG. 6) are integrally incorporated in the insulating housing 71.
The screw fastening type fusible link 30 is connected to the fuse terminal 32 with the electric wire 44 in a state in which one terminal of the pair of fuse terminals 32 is in contact with the inner surface of the bus bar 77. A connection terminal (round terminal) 42 superimposed on the surface and a bolt 40 penetrating the bus bar 77 are inserted and screwed into a nut 79 disposed on the inner surface side of the bus bar 77, whereby the insulating housing 71 is inserted. Removably fixed. Similarly, the other terminal of the fusible link 30 is also fixed by bolts and nuts.
[0004]
Further, the bus bar 77 extends at the end portion into the accommodating portion 75 for medium current or less and extends to a lower position facing the male tab 77a, which is connected to the insertion type fusible link 35. A male terminal 77b led out into a connector 81 to be described later is formed.
[0005]
The connector 81 is required when power is supplied by drawing a separate electric wire having a different wiring location from the electric wire 44 to which the round terminal 42 is connected, for example, from the engine room into the vehicle compartment. The insulating housing 71 is integrally provided at a lower position corresponding to the storage portion 75. In other words, by adopting the above-described configuration, the mating connector (not shown) to be connected to the connector and the round terminal 42 to which the electric wire was connected could be arranged at respective predetermined positions without interfering with each other. And the electric wire arranged and connected by the connector was able to supply power to the vehicle interior satisfactorily.
[0006]
[Problems to be solved by the invention]
However, in the above-described conventional fuse box 70, the connector 81 is set at a position where it does not interfere with the connection terminal 42 and at a position below the storage portion 75 that does not overlap with the storage portion 75 for medium current or less. As a result, the space efficiency in the insulating housing limited to a predetermined size was poor, and the number of the fuse storage portions was reduced.
The bus bar 77 leads the battery power from the fusible link 30 for large current connected to one end side to the connector coupling portion on the other end side and supplies it to the vehicle interior. As a result, the circuit resistance was increased and heat was easily generated.
The present invention has been made in view of the above situation, and an object of the present invention is to provide a fuse box that improves space efficiency and shortens a bus bar to prevent temperature rise, thereby improving performance.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a fuse box according to the present invention has at least a housing portion into which a screw-fastening type fusible link is inserted, and a bus bar connected to the fusible link is integrally disposed therein. setting the insulating housing, in the fuse box comprising a connector you distribute supply power to derive the bus bar by continuously provided, it is formed at a lower position facing the connector to the housing part, the bus bar, the connector It is characterized in that it is bent so that the portion leading out is located inside the insulating housing from the portion connecting the fusible link.
[0008]
In the fuse box, a connector for distributing and supplying power is set at a lower position of the housing portion of the screw-fastening type fusible link, and a bus bar led out to the connector is fixed to the fusible link fixing portion. By bending it so that it is placed at the inner position of the housing set one step lower, it is possible to substantially overlap the connector area on the storage section for the high current fusible link and improve the space efficiency. did it.
In addition, since the connector region was set adjacent to the round terminal connected to the battery power source, the bus bar was shortened to reduce the temperature rise.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of a fuse box according to the invention will be described with reference to the drawings.
1 is a partially cutaway perspective view of an embodiment of a fuse box according to the present invention, FIG. 2 is a front view of the fuse box of FIG. 1, FIG. 3 is a bottom view of FIG. It is a PP sectional view. In FIGS. 1 and 3, the round terminal and the fusible link attached to the fuse box are both omitted for the sake of simplicity. In addition, the same members and the same parts as those in the conventional structure are denoted by the same reference numerals for description.
The fuse box 1 has a large current fusible link storage portion 13 and a medium current or less fusible link storage portion 15 arranged in parallel on a top surface of an insulating housing 11 formed in a substantially rectangular parallelepiped. It consists of a configuration in which In the present embodiment, the large current fusible link accommodating portion 13 and the medium current or smaller fusible link accommodating portion 15 are both formed at two locations.
[0010]
As shown in FIG. 2, a screw-tight fusible link 30 can be inserted into the large current storage unit 13, and an insertion type fusible link 35 is inserted into the medium current storage unit 15. Made possible.
The fuse box 1 has an open bottom surface, and a round terminal 42 connected to the electric wire 44 can be inserted from below.
[0011]
On the other hand, in the insulating housing 11, as shown in FIGS. 3 to 4, the two first and second bus bars 3 and 9 are arranged at predetermined intervals along the direction in which the fusible links 30 to 35 are juxtaposed. It is integrated in a state of being separated only.
A plurality of nuts 79 are integrally incorporated in the insulating housing 11 between the bus bars 3 and 9. That is, each bus bar 3, 9 is disposed so as to be positioned on the front side of the nut 79. Therefore, these nuts 79 are connected to the round terminals 42 and the wires connected by the bolts 40 that pass through the long holes 5 (see FIG. 1) formed in the bus bars 3 and 9 and are screwed from the outside. The fuse terminal 30a (see FIG. 2) can be detachably fixed to the surface of each bus bar 3,9.
[0012]
However, the first bus bar 3 is shortened in the juxtaposition direction with respect to the second bus bar 9 as clearly shown in FIG. 3, and one large current storage portion (left storage portion in FIG. 3). 13 is not provided. Therefore, as shown in FIG. 2, the first bus bar 3 is omitted in the storage portion 13, and the round terminal 42 is directly connected to the fuse terminal 30a by tightening the bolt 40 to the nut 79. .
[0013]
Now, the first bus bar 3 described above will be described in further detail. As shown in FIG. 1, the bus bar 3 is formed by pressing a conductive metal plate, and a base body to which the round terminal 42 is fixedly connected. A portion 3a, a locking piece 3b extending upward at one end of the base portion 3a and locked in the insulating housing 11, and extending downward facing the locking piece 3b and leading into the connector 21 And a guide part 3d formed by bending the other end of the base part 3a. When the bus bar 3 is assembled into the insulating housing 11, the guide portion 3 d improves the insertion of the bus bar 3 and at the same time restricts the position of the bus bar 3 to a predetermined position in the assembled state. It is fixed and locked inside.
In addition, a power source wire 44 directly connected to a vehicle battery (not shown) and a round terminal (a right terminal in FIG. 2) 42 connected to the base body portion 3a are attached.
[0014]
The first bus bar 3 is formed such that a male terminal 3c extending from the base portion 3a is bent so that a step is provided on the plate surface of the base portion 3a and located inside the insulating housing 11. That is, in the first bus bar 3 having the bent male terminal 3c and the base portion 3a disposed on the front surface side of the nut 79, the male terminal 3c accommodates and holds the nut 79 as shown in FIG. Are arranged as follows.
[0015]
By the way, the insulating housing 11 has a structure in which a connector 21 is continuously provided at a lower position facing the storage portion 13 formed closer to the center of the storage portion 13 for large current on the upper surface. Therefore, when the first bus bar 3 is inserted into the insulating housing 11, the base portion 3a is located on the front side of the nut 79 and the male terminal 3c is located near the center as shown by an imaginary line in FIG. It is led out into the connector 21 at a position facing the storage portion 13. At this time, since the male terminal 3c is bent so as to be located inside the insulating housing 11 as described above, the connector 21 is connected to the insulating housing 11 so as not to protrude from the outer surface of the insulating housing 11. Can be set.
[0016]
Further, since the first bus bar 3 is provided in a bent structure and the male terminal 3c accommodates and holds the nut 79 as described above, at the time of assembling the fuse box 1, at least a position corresponding to the connector region. The nut 79 for fixing the fusible link 30 is inserted from below the housing prior to the first bus bar 3 and must be held in the insulating housing 11. Therefore, the nut 79 has a nut insertion area A formed inside the connector insertion area B into which the mating connector is inserted, as indicated by a two-dot chain line frame in FIG.
[0017]
On the other hand, as shown in FIG. 4, the second bus bar 9 is configured as a substantially flat plate surface at the rear side portion corresponding to the nut position in the direction of insertion into the insulating housing 11. Therefore, the bus bar 9 can be inserted without causing any significant interference with the nut 79, and a male tab (not shown) is led out to the storage portion 15 for medium current or less, and at the same time, the base portion 9a is used for high current. It is arranged at a nut position corresponding to the storage portion 13.
[0018]
Finally, in the insulating housing 11, in order to regulate the insertion depth of the mating connector to be connected to the connector at the portion corresponding to the boundary between the nut insertion area A and the connector insertion area B described above, A contact surface 19 with which the tip surface abuts is formed. In addition, the insulating housing 11 corresponds to the nut position so that a jig can be inserted when the screw-fastening fusible link 30 and the round terminal 42 are fixed to the bus bars 3 and 9 with bolts 40. The outer wall is notched.
[0019]
In the fuse box 1 having the above configuration, the members 79 are assembled in the order of the nut 79 and the bus bars 3 and 9 in the insulating housing 11, and then the fusible links 30 and 35 are inserted into the housing portions 13 and 15. . Then, the power supply wire 44 directly connected to the vehicle battery and the round terminal 42 connected thereto are connected to a nut (a nut at the right end in FIG. 1) 79 at a position corresponding to the storage portion 15 for a medium current or less. It is bolted via the bus bar 3. The first bus bar 3 is fixedly held on the insulating housing 11 at the same time by a bolt 40 screwed onto a nut 79 at a position corresponding to the connector region. An electric wire connected to each load (not shown) is fixed to each bus bar 3 and 9 via a round terminal 42 and a female tab (not shown) connected to a nut. Furthermore, when wiring an electric wire of another system, the mating connector is connected to the connector 21.
[0020]
【The invention's effect】
As described above , according to the fuse box of the present invention , at least the screw-fastening type fusible link is inserted in the upper portion, and the bus bar connected to the fusible link is integrally provided therein. In the fuse box in which the insulating housing is connected to a connector that leads out the bus bar and distributes and supplies power, the connector is formed at a lower position facing the storage portion, and the bus bar is formed in the connector. The lead-out part is bent so as to be located inside the insulating housing from the part connecting the fusible link, and corresponds to the storage part for the high-current fusible link of the insulating housing that could not be arranged conventionally. Since the connector can be connected to the position, it has more space than an insulated housing with the same external dimensions. Rate can be improved is, it is possible to increase the number of arranged fuse receiving portion.
In addition, since the first bus bar obtains a separate battery power source connected to the connector from the round terminal adjacent to the connector, the energization path can be shortened to reduce the heat generated by the circuit resistance.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view of an embodiment of a fuse box according to the present invention.
2 is a front view of the fuse box of FIG. 1. FIG.
FIG. 3 is a bottom view as seen in the direction of arrow E in FIG. 2;
4 is a cross-sectional view taken along line PP in FIG. 3;
FIG. 5 is a longitudinal sectional view of a conventional fuse box.
6 is a bottom view as seen in the direction of arrow F in FIG. 5. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fuse box 3 1st bus-bar 9 2nd bus-bar 11 Insulation housing 13 Storage part 15 for large current fusible links Storage part 21 for fusible links below medium current Connector 30, 35 Fusible link 40 Bolt 42 Round Type terminal (connection terminal)
79 Nut

Claims (3)

An insulating housing that has at least an upper housing portion for inserting a screw-tight fusible link and that has a bus bar that is integrally connected to the fusible link is provided inside to distribute the power by leading out the bus bar. in the fuse box comprising a connector you supplied by continuously provided,
Forming the connector at a lower position facing the storage portion;
The fuse box, wherein the bus bar is bent so that a portion led out into the connector is located inside the insulating housing from a portion connecting the fusible link. A nut into which a bolt that penetrates the fusible link and the bus bar is screwed is inserted into the insulating housing and integrated into the insulating housing, and a nut insertion area is formed inside the connector insertion area of the connector. The fuse box according to claim 1. The fuse box according to claim 2, wherein a contact surface for restricting an insertion depth of a mating connector to be connected to a connector is provided at a boundary between the nut insertion area and the connector insertion area.

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