JP3085208B2 - Electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box comprising a junction box used for an automobile wire harness, and more particularly to an integrated fuse, a connector for electric wire connection,
The components mounted on the electric connection box, such as diodes and short pins, are connected to the internal circuit without the intervention of relay terminals.

[0002]

2. Description of the Related Art Conventionally, a junction box used for a wire harness for an automobile is equipped with an integrated fuse, a diode, a connector for connecting an electric wire, a short pin, and the like, and a tab protruding from these mounted components is housed in the junction box. Connected via a relay terminal. That is, as shown in FIG. 7, tabs 21 a and 21 protruding in parallel from the lower surface of case 20 of integrated fuse 10 are provided.
g and 21h are connected to a tab 13b formed by bending from the bus bar 13 accommodated in the junction box via a relay terminal 30 provided with female fitting portions 30a and 30b on both sides.

[0003]

In such a case, a relay terminal 30 is required for each tab, and the number of parts is increased.
A portion for inserting the relay terminal is required, and there is a problem that the mounting part mounting portion of the junction box becomes large.

[0004] Further, if the connection is made via a relay terminal, the tabs of the mounted components cannot be narrowed, and there is a problem that the mounted components also become larger.

Further, even when it is necessary to connect the tab of the mounted component to the bus bar of the same circuit, the tab is separately bent and provided on the bus bar, and each tab is connected to the tab of the mounted component via a relay terminal. There is a problem that the structure is complicated.

The present invention has been made in view of the above-described problem, and has as its object to directly connect a tab of a bus bar to a tab of a mounted component without a relay terminal.

[0007]

In order to solve the above-mentioned problems, according to the present invention, parts mounted on an electric connection box such as an integrated fuse, a connector for electric wire connection, a diode, a short pin, etc. A tab projected at a narrower pitch is connected to a bus bar housed inside the electric connection box, wherein a tab bent from the bus bar is provided with a pressure contact groove, and the tab of the mounting component is provided in the pressure contact groove. A tab connected to the bus bar of the same circuit is made to protrude adjacent to the case, and the bus bar is bent upward in a U-shape. A groove is provided, and a pair of press contact grooves cut in the vertical direction from the groove are provided on both side vertical walls, and tabs arranged adjacent to the mounting component are press-fitted into these pair of press contact grooves to be electrically connected. An electric connection box is provided.

[0008] In the above configuration, when the press-contact groove is provided in the tab provided to be bent in the bus bar, the tab of the mounting component is press-fitted into the press-contact groove, so that the connection can be made directly without the intervention of the relay terminal. Therefore, tabs can be protruded from the mounted component at a narrow pitch, and the size of the mounted component can be reduced. Also, when it is necessary to connect a tab to the bus bar of the same circuit, if the U-shaped bent portion is provided on the bus bar and press contact grooves are provided on both vertical wall portions, the tab of the mounted component can be efficiently connected to the same circuit. Can be connected to a bus bar.

For example, when it is necessary to connect two tabs to a power supply in an integrated fuse, these tabs can be arranged side by side in the center and connected to both side press-contact grooves of the U-shaped bent portion of the bus bar. . The tab connected to the power supply side of the integrated fuse branches its extending portion, and a fusing portion is provided at these branch portions to provide a load connection side tab. These tabs are arranged on both sides of the power supply connection side tab. Then, when the tab is connected to a tab having a press-contact groove of another bus bar, each tab of the integrated fuse can be connected to the bus bar in a small space. The tip horizontal wall of the bent portion of the bus bar cuts off one side of the lateral groove, and allows the upper end of one side of the press contact groove of the vertical wall to be movable without being connected via the tip horizontal wall. Preferably (claim 2).

As described above, when the vertical walls on both sides provided with the press contact grooves are made movable, it is possible to easily absorb the deformation, displacement or error in the thickness of the tab on the mounting component side in the thickness direction.

Further, if one side of the end horizontal wall is cut off as in the second aspect, the strength is weakened. Therefore, the other side of the lateral groove of the end horizontal wall of the bus bar is connected to both side vertical walls. The width of the cut side is preferably larger than the width of the cut side (claim 3).

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

As shown in FIG. 1, a fixed pitch P from the lower surface of the case 20 of the integrated fuse 10 mounted on the electric junction box.
The tabs 21a, 21g, and 21h protruding from are connected to the bus bars 1, 2, 3, 4, and 5 housed inside the electric connection box.

The integrated fuse 10 is shown in FIGS. 3A and 3B.
As shown in (C), a case 20 made of an insulating resin
Accommodates two sets of conductive plates 21 (21A, 21B), each of which has a shape having three comb teeth as shown in the figure, and a power supply connection at the tip of one tooth (a). A side tab 21a is provided, and a bent portion 21c is provided in a direction perpendicular to the tip of the extending portion 21b, and two teeth (b) and (c) are branched from the bent portion 21c.
Load connection side tabs 21g, 21h at the ends of d, 21f, respectively.
And a narrow fusing portion 2 in the middle of the branch portion.
1i and 21k are provided.

The tabs 21a, 21g, and 21h are projected at a constant pitch P narrower than the lower surface of the case 20, and the two sets of conductors accommodated in the case 20 have their power connection side tabs 21a, 21a centered. The load connecting tabs 21g and 21h are arranged adjacent to each other and arranged so as to be arranged. These six tabs are juxtaposed and project from the lower surface of the case 20 at the same pitch P.

A bus bar 1 connected to the power supply connection side tabs 21a of the same circuit at the center of the integrated fuse 10
As shown in FIG. 2, at the portion corresponding to the tabs 21 a, 21 b, upwardly refracted in a U-shape, and a lateral groove reaching both side vertical walls 1 c, 1 d in a tip horizontal wall 1 b of the refraction portion 1 a. 1e is provided. Also, both side vertical walls 1c, 1d
Are provided with a pair of press contact grooves 1f and 1g which are cut vertically from both ends of the groove 1e. The pitch between the pair of press contact grooves 1g and 1h provided on the vertical walls on both sides is the tabs 21a and 21a.
And the tabs 21a, 21a are press-fitted from above into the press-contact grooves 1f, 1g, respectively, to be electrically connected.

Further, the tip horizontal wall 1b of the bending portion is formed by cutting off one side of the lateral groove 1e to form an opening 1f.
1k is movable without being connected via the front end lateral wall.

Further, the lateral groove 1 of the tip lateral wall 1b is formed.
e The width w of the side 1j that is continuous with the vertical wall on both sides at the other side.
1 is larger than the width w2 of the cut-off side.

The substrate 1a of the bus bar 1 on the power supply connection side
Tabs 2b, 3a provided with press-contact grooves 2c, 3c are formed by laminating the board portions 2a, 3a of the busbars 2, 3 on the upper surfaces of both sides via insulating plates 6A.
b is formed. These tabs 2b, 3b
Are arranged side by side in parallel with the vertical walls 1c and 1d on both sides, and the pitch P
With a gap.

Further, the substrate 2 of the busbars 2 and 3
a, base plates 4a, 5a of the bus bars 4, 5 are laminated on the upper surface of the base plates 4 and 5 via an insulating plate 6B, and the tips of the base plates 4a, 5a are bent, and tabs 4b provided with pressure contact grooves 4c, 5c are provided.
5b. These tabs 4b, 5b are arranged in parallel with the vertical walls 1c, 1d on both sides of the bus bar 1 and the tabs 2b, 3b, and are spaced apart from the tabs 2b, 3b by a pitch P, respectively.

As described above, the bus bars 2, 3 are provided on both sides of the upper surface of the bus bar 1 housed in the electric connection box via the insulating plates 6A.
The bus bars 4 and 5 are stacked on the upper surfaces of the bus bars 2 and 3 via an insulating plate 6B. The tabs 2b and 4b and 3b
And 5b are arranged at a constant pitch.

When the integrated fuse 10 is mounted on the electric connection box accommodating the bus bars 1 to 5 as described above, and the tabs 21a, 21g, 21h are inserted into the electric connection box, FIG. As shown in (B), the tabs 21a on the power supply connection side at the center are press-fitted into the press-contact grooves 1g, 1h of the vertical walls 1c, 1d on both sides of the bent portion 1a of the bus bar 1.

At this time, the tabs 21a of the integrated fuse 10
When 21a is displaced or deformed in the thickness direction of arrow Z in FIG. 1, or when an error occurs in the thickness,
Since the upper ends 1i and 1k of the press contact grooves 1g and 1h are movable in the direction of arrow Z ', the press contact grooves 1
The peripheral surfaces of g and 1h come into contact with the tabs 21a and 21a, and no contact failure occurs.

Further, the other sides of the press contact grooves 1g and 1h are connected by the front end lateral wall 1b so as to be immovable, and the width w1 of the connection side is set to be large, so that they are not easily deformed.
The press contact grooves 1g and 1h are not opened, and the tab 21a is not in poor contact.

The tabs 21g and 21h on the load connection side on both sides of the integrated fuse 10 are respectively connected to the bus bars 2, 3, 4, 5 on both sides.
Pressure connection in the same manner as the tabs 2b to 5b.

FIG. 5 shows a second embodiment, in which a lateral groove 1e is provided at the center of the distal end lateral wall 1b of the bending portion 1a provided on the bus bar 1 on the power supply side, and both ends of the groove 1e are provided on both vertical walls 1c, 1d. The configuration in which the pressure contact grooves 1g and 1h are provided continuously is the same as that of the first embodiment, but the vertical walls 1c and 1d are continuous on both sides of the groove 1e without cutting off one of the grooves 1e of the front end lateral wall 1b. .

With the above-mentioned shape, the tabs 21a of the integrated fuse 10, the tabs 21a of the integrated fuse 10,
21a can be inserted and connected, and the amount of deformation of the press contact grooves 1g and 1h on both sides can be reduced so as to make reliable contact with the tab.

In the above embodiment, the integrated fuse is connected to the bus bar in the electric connection box without passing through the relay terminal. However, when the short pin 40 shown in FIG. 6 is mounted on the electric connection box instead of the integrated fuse. Similarly, the relay terminal can be eliminated. That is, the tab 42 protruding from the case 41 of the short pin is connected to the integrated fuse 10.
If the tabs have the same shape and project at the same pitch, they can be selectively connected to the bus bar.

[0029]

As is apparent from the above description, according to the present invention, a tab protruding in parallel with a narrower pitch than a case of a mounted component can be provided without passing through a bus bar housed in an electric connection box and a relay terminal. Can be connected. In particular, connecting the tab of the mounted component to the tab of the same bus bar, which has been difficult to connect without the intermediary terminal, requires the bus bar to have a U-shaped connection.
By providing a U-shaped bent portion and press-contact grooves on the vertical walls on both sides of the bent portion, it became possible to connect to a tab of a mounted component without interposing a relay terminal.

As described above, since the connection can be made without the intermediary of the relay terminal, the number of parts can be reduced, the number of mounting steps can be reduced, and the cost can be reduced. In addition, since a mounting space for the relay terminal is not required, the size of the electric connection box can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 shows an integrated fuse, (A) is a plan view,
(B) is a front view, and (C) is a drawing in which the front side of the case is cut away.

FIG. 4 shows a state in which a tab is pressure-connected to a bus bar,
(A) is a front view, (B) is a side view.

FIG. 5 is an exploded perspective view of the second embodiment.

FIG. 6 is a perspective view of a short pin.

FIG. 7 is a perspective view of a conventional example.

[Explanation of symbols]

 1-5 Bus bar 1a Refracting portion 1b Tip horizontal wall 1c, 1d Both vertical walls 1e Groove 1g, 1h Pressure contact groove 2b-5b Tab 10 Integrated fuse 21a Power supply connection side tab 21g, 21h Load connection side tab 21k, 21i Fusing section

Claims (3)

(57) [Claims] 1. A bus bar in which components mounted on an electric connection box, such as an integrated fuse, a connector for electric wire connection, a diode, and a short pin, are protruded at a narrow pitch from a case. Connecting, providing a press-contact groove in a tab bent from the bus bar,
Press-connect the tab of the mounting component to the press-contact groove, and
A tab connected to a bus bar of the same circuit is protruded adjacent to the case from the case, and the bus bar is bent upward in a U-shape. A pair of pressure contact grooves cut in the wall in the vertical direction from the groove are provided, and a tab arranged adjacent to the mounting component is press-fitted into the pair of pressure contact grooves to be electrically connected. Connection box. 2. The front lateral wall of the bent portion of the bus bar cuts off one side of the lateral groove so that the upper ends of the press contact grooves of both vertical walls are not connected via the front lateral wall. The electrical junction box according to claim 1, wherein the electrical junction box is movable. 3. The width of the other side of the lateral groove of the front end horizontal wall of the bus bar on the side continuous with both vertical wall portions is larger than the width of the cut-off side. Electrical junction box.