JP3666704B2 - Fuse box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a housing structure of a fuse box interposed between a power supply wire directly connected to a battery in an automobile or the like and an electrical component as a load.
[0002]
[Prior art]
A structure of a fuse box in a conventional automobile will be described with reference to FIGS. FIG. 5 is a partial sectional view of a conventional fuse box, and FIG. 6 is a view taken in the direction of arrow A in FIG.
As shown in FIGS. 5 and 6, fusible link storage portions 42, 42 into which a large current fusible link 45 is inserted at a plurality of locations in the housing 41 of the fuse box 40, and a plug-in type medium current or smaller fuse. There is provided a fusible link storage portion 43 into which the bull link 44 is inserted in the direction of arrow C.
[0003]
A bus bar 46 made of a plate-like conductive material is incorporated in the housing 41, and the lower end of the fusible link 45 inserted into the fusible link storage portions 42, 42 is inserted into the extended end of the bus bar. The connecting portion 45a is in contact.
A plurality of nuts 47 and 47 are inserted into the housing 41 so as to contact a part of one side of the bus bar 46. A connection terminal (LA type terminal) 49 that passes through the bus bar 46 and is tightened by a bolt 50 is detachably fastened to the nut 47 on one side of the bus bar 46.
[0004]
A large current from the battery in the conventional fuse box 40 is sent to the bus bar 46 by the power supply wire 48 and further sent to each electrical component via the fusible link 45. Therefore, since the fusible link 45 is installed in the electric wire connected to each electrical component, the flow of overcurrent to the electrical component is prevented, and the electrical component is protected from being damaged by the overcurrent. ing.
[0005]
[Problems to be solved by the invention]
However, in the conventional fuse box 40, the neck portion 49A of the connection terminal 49 fixed to the end of the power supply wire 48 and attached to the bus bar 46 assembled in the housing 41 acts as an external force as shown in FIG. Because the electric wire that fixes the connection terminal 49 is the power supply cable 48, the deformation or breakage of the connection terminal 49 may cause a failure of the electric system, and there is a problem in the reliability of the fuse box. Was.
[0006]
An object of the present invention is to provide a fuse box capable of preventing deformation of a connection terminal mounted in a housing and improving the connection terminal mounting work.
[0007]
[Means for Solving the Problems]
According to the present invention, there is provided a bus bar in which a fusible link housing portion into which a plurality of fusible links are inserted is provided in a housing, and a connection terminal fixed to an electric wire is attached and connected to the fusible link. In the built-in fuse box, a notch window for mounting the connecting terminal to the bus bar is provided in a part of the outer shell of the housing, and an electric wire caulking portion of the connecting terminal and adjacent to the caulking portion It is possible to solve the problem by a fuse box characterized in that a connection terminal cover portion is provided to cover the end of the electric wire , and one end of the connection terminal cover portion constitutes a part of the notch window edge portion. .
In the fuse box configured as described above, the wire crimping portion of the connection terminal attached to the bus bar and the end of the wire adjacent to the crimping portion are protected to reliably prevent deformation and breakage of the connection terminal due to the external force applied to the wire. be able to.
[0008]
Furthermore, contact with and protecting the connection terminal to prevent deformation and damage due to the action of an external force, to facilitate the bolting work of the connection terminals for the bus bar, the deformation of the clamping and loosening operations when the connection terminals of the bolt and damage Can be prevented .
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the fuse box of the present invention will be described in detail with reference to FIGS. 1 is an exploded perspective view of a fuse box according to the present invention, FIG. 2 is a cross-sectional view showing a completed state of assembly of bus bars and connection terminals of the fuse box in FIG. 1, FIG. 3 is a view taken in the direction of arrow D in FIG. FIG. 4 is a view taken along arrow E in FIG. 3.
As shown in FIGS. 1 to 3, the fuse box 1 according to the present embodiment includes a fusible link that is connected to a power supply wire 3 for a large current in a housing 2 formed of an electrically insulating hard synthetic resin material. A plurality of first fusible link housing portions 5 and 5 for housing 4 and 4 and a second fusible link housing portion 8 for housing a fusible link 7 connected to an electric wire 6 having a medium current or less are formed in the upper part. ing. In addition, bus bars 9 and 9 for connecting the electric wire 6 and the fusible link 4 are assembled at appropriate positions in the housing 2.
[0010]
A plurality of nuts 10 and 10 that match the mounting holes of the bus bar 9 are inserted at appropriate positions in the housing 2. In addition, a notch window 11 is opened at an appropriate position on the outer wall of the housing 2, and the notch window functions as a work hole for inserting a tightening tool for fixing the end of the electric wire 6 to the bus bar 9 with a bolt. .
[0011]
Further, the outer periphery of the housing 2 includes a caulking portion 12A of a connection terminal 12 fixed to an end portion of a power supply electric wire 3 connected to a bus bar 9 incorporated in the housing, and an electric wire end portion adjacent to the caulking portion. A connection terminal cover portion 13 is provided to cover the 3A portion. One end of the connection terminal cover part is formed at an edge part forming the cutout window 11.
[0012]
The connection terminal 12 crimped to the end of the power supply wire 3 is detachably attached to the bus bar 9 by a nut 10 inserted into the housing 2 and a bolt 14 screwed into a mounting hole of the bus bar 9.
[0013]
The notch window 11 is used to tighten or loosen the bolt 10 by inserting a tightening tool when the connecting terminal 12 is fixed. And since the electric wire 3 for power supply is attached to the bus bar 9, an electric current is sent to each electrical component via the fusible link 4 connected to the bus bar 9.
[0014]
As described above, the fuse box 1 of the present embodiment is attached to an appropriate place in the automobile, and is disposed inside the bus bar through the mounting hole in the bus bar 9 assembled in the fuse box. The connection terminal 12 is detachably attached by screwing the tightening bolt 14 into the nut 10. Therefore, even if an external force that lifts the electric wire from the fuse box, for example, acts on the electric power wire 3 after the electric power wire 3 is connected to the bus bar 9, the outer periphery of the caulking portion 12A of the connecting terminal 12 and the electric wire end portion 3A. Since the connection terminal cover portion 13 is provided at the position, bending of the caulking portion 12A and the wire end portion 3A of the connection terminal 12 is suppressed. Thereby, deformation and breakage of the caulking portion 12A of the connection terminal 12 are reliably prevented.
[0015]
Further, since one end of the connection terminal cover portion 13 corresponds to the edge portion of the cutout window 11 formed for bolt tightening work, the connection terminal cover portion 13 prevents deformation and breakage of the connection terminal 12 and the bolt. It does not interfere with the tightening and loosening operations.
[0016]
【The invention's effect】
As described above, in the fuse box of the present invention, a notch window for mounting the connection terminal to the bus bar is provided in a part of the outer shell of the housing, and the electric wire caulking portion of the connection terminal and the caulking portion are provided. The connection terminal cover part which covers the electric wire edge part adjacent to a part is provided , and the end of this connection terminal cover part comprises a part of notch window edge part .
Therefore, even if an external force is applied to the caulking portion of the connection terminal and the end of the electric wire adjacent to the caulking portion, the neck portion including the caulking portion of the connection terminal can be reliably prevented from being deformed, and the housing outer shell is also reinforced. A reliable fuse box can be obtained.
[0017]
Furthermore, contact with and protecting the connection terminal to prevent deformation and damage due to the action of an external force, to facilitate the bolting work of the connection terminals for the bus bar, the deformation of the clamping and loosening operations when the connection terminals of the bolt and damage Can be prevented , and the workability during production line and maintenance can be improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an embodiment of a fuse box of the present invention.
2 is a cross-sectional view showing a state in which a bus bar and connection terminals of the fuse box in FIG. 1 are assembled. FIG.
FIG. 3 is a view taken in the direction of arrow D in FIG. 2;
4 is a view taken in the direction of arrow E in FIG. 3;
FIG. 5 is a cross-sectional view showing a conventional fuse box.
6 is a view on arrow A in FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fuse box 2 Housing 3 Power supply electric wire 3A Electric wire end part 4 Fusible link 5, 8 Fusible link accommodating part 9 Bus bar 10 Nut 11 Notch window 12 Connection terminal 12A Electric wire crimping part 13 Connection terminal cover part

Claims (1)

In the fuse box having a fusible link housing portion in which a plurality of fusible links are inserted in the housing, a connection terminal fixed to an electric wire is attached, and a bus bar is connected to the fusible link.
A cutout window for attaching the connection terminal to the bus bar is provided in a part of the outer shell, and covers a wire crimping portion of the connection terminal and a wire end adjacent to the crimping portion. A fuse box , wherein a connection terminal cover is provided , and one end of the connection terminal cover constitutes a part of the notch window edge .

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