JP2001008332A - Electric splice box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric splice box in which a fuse can be fitted easily into a fuse housing chamber surely by preventing the lateral displacement of a bus bar to a bus-bar housing chamber. SOLUTION: The electric splice box has a splice box body 11, in which a plurality of fuse housing chambers 12, into which fuses 18 are fitted from upper sections, are formed through each partition wall 13 respectively, while bus bar housing chambers 16 are formed so as to cross over a plurality of the fuse housing chambers 12 through slits 15 formed to each partition wall 13, bus bars 17 for forming branch circuits fitted into the bus bar housing chambers 16 from upper sections, and the fuses 18, a plurality of which are formed integrally on the upper sides of the bus bars 17, an which are connected to terminal sections 17a positioned on the opening ends 12a side of a plurality of the fuse housing chambers 12 respectively in the case of the completion of fitting into the bus bar housing chambers 16. Furthermore, mutually engaged positioning means 15A, 17A are installed to the lower sides of the bus bars 17 and the bus bar housing sections 16 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box such as a fuse box mounted on an automobile.

[0002]

2. Description of the Related Art FIG. 3 shows an electrical junction box of this type. In the electric connection box 1, a plurality of fuse accommodating chambers 2a are respectively formed via the partition walls 3, and
A substantially boxed, insulated junction box body having a busbar housing chamber 5 formed so as to cross each fuse housing chamber 2a through each of the partition walls 3 and each slit 3a formed on the side of the electric wire connection portion 4. 2, a bus bar 6 for forming a branch circuit which is fitted into the bus bar housing chamber 5 from above, and a bus bar 6 which is fitted from above to each fuse housing chamber 2a.
a fusible link (fuse) 7 connected to each of the male terminals (terminal portions) 6a on the upper side of the bus bar 6 located on the open end side of the bus bar 6, and a bent portion of the bus bar 6 at the electric wire connection portion 4. 6b, and a terminal plate 9 to which an electric wire 8 fastened and fixed by a nut (not shown) is connected.

When assembling the electric junction box 1,
Each fuse accommodating chamber 2a and each slit 3a of the connection box body 2
When the bus bar 6 is completely fitted into the bus bar accommodating chamber 5 composed of the bus bar 6, the male terminals 6a integrally formed on the upper side of the bus bar 6 are located at the opening end sides in the fuse accommodating chambers 2a, respectively. The female terminal 7a of the fusible link 7 is connected to the terminal 6a.

In addition, the direction in which the busbar 6 is fitted into the busbar housing chamber 5 of the connection box main body 2 and the direction in which the fusible link 7 is fitted into the fuse housing chamber 2a are in the same direction from above. Connection box body 2 of connected terminal plate 9
The connection direction to the electric wire connection portion 4 is also the same direction from above, so that there is no restriction on the mounting time of the terminal plate 9, the working space can be saved, and the cost can be reduced.

Incidentally, a similar technique relating to the electric junction box 1 is disclosed in Japanese Utility Model Laid-Open No. 3-62474 and Japanese Patent Laid-Open No. 7-220.
No. 97, respectively.

[0006]

However, in the conventional electric junction box 1, the bus bar 6 is fitted (fitted) into the bus bar accommodating chamber 5 of the junction box body 2 from above. The bus bar 6 is displaced in the bus bar housing 5 formed so as to cross each fuse housing 2a by each fuse housing 2a and each slit 3a formed on each partition wall 3 and the electric wire connecting portion 4 side. Backlash was easy to occur. If the male terminals 6a of the bus bar 6 are displaced from the regular positions on the open end side in the fuse housing chambers 2a due to the lateral displacement of the bus bar 6, the fusible link 7 cannot be fitted into the fuse housing chambers 2a. Or
The female terminal 7a of the fusible link 7 cannot be connected to each male terminal 6a of the bus bar 6 in a half-fitted state.

Accordingly, the present invention has been made to solve the above-mentioned problem, and the bus bar can be easily and reliably positioned when the bus bar is fitted into the bus bar accommodating chamber of the connection box body. It is another object of the present invention to provide an electric connection box in which a fuse can be easily and surely fitted in a fuse accommodating chamber of a connection box body by reliably preventing lateral displacement of the bus bar.

[0008]

According to a first aspect of the present invention, a plurality of fuse accommodating chambers into which fuses are fitted from above are formed via respective partition walls, and at least the fuse housing chambers are formed in the respective partition walls. A connection box main body having a bus bar accommodating chamber formed so as to cross the plurality of fuse accommodating chambers through a slit, a bus bar for forming a branch circuit fitted into the bus bar accommodating chamber from above, and a plurality of bus bars arranged above the bus bar. An electric junction box integrally formed and provided with the fuses connected to terminal portions respectively located on the open end sides of the plurality of fuse accommodating chambers when the fitting into the bus bar accommodating chamber is completed, wherein the bus bar and the The bus bar accommodating chamber is provided with positioning means for engaging with each other.

In this electrical junction box, when the bus bar is fitted into the bus bar housing, the bus bar positioning means and the bus bar positioning means engage with each other, so that the bus bar can be positioned easily and reliably. Further, the lateral displacement of the bus bar is reliably prevented, and the fuse is easily and surely fitted into the fuse accommodating chamber.

According to a second aspect of the present invention, in the electric junction box according to the first aspect, the bus bar positioning means is a concave portion formed at a lower end of the bus bar at a position facing the slits. The positioning means of the busbar accommodating chamber is a projection formed in each of the slits and fitted into the recess.

In this electric junction box, when the recesses at the lower end of the bus bar are fitted along the slits, the recesses of the bus bar are easily fitted and positioned in the projections of the bus bar accommodating chamber, and the bus bar is positioned. The busbar can be easily and reliably stored in the proper position of the busbar storage chamber without lateral displacement.

According to a third aspect of the present invention, in the electrical junction box according to the second aspect, the convex portion is formed by leaving a part of each partition wall.

In this electric connection box, the projection of the positioning means is formed by leaving a part of each partition wall.
The projection is formed at low cost. As a result, a high quality electrical junction box is manufactured at low cost.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an electric connection box according to an embodiment of the present invention, FIG. 2A is a front view of a bus bar used in the electric connection box, and FIG. It is sectional drawing which follows the X-ray.

As shown in FIG. 1 and FIG.
Forms a plurality of fuse accommodating chambers 12 via the respective partition walls 13 and traverses the fuse accommodating chambers 12 via the respective partition walls 13 and the respective slits 15 formed on the side of the electric wire connection portion 14. And a connection box main body 11 having a substantially box-shaped and insulated bottom having a bus bar housing chamber 16 formed therein, a bus bar 17 for forming a branch circuit fitted into the bus bar housing chamber 16 from above, and each of the fuse housings described above. Open ends 1 of the respective fuse accommodating chambers 12 are fitted into the chambers 12 from above.
The busbars 1 respectively located at regular positions on the side 2a.
A fusible link (fuse) 18 connected to each male terminal (terminal portion) 17a on the upper side of 7 and a lower part (a rectangular hole (not shown) in the bottom wall 11a of the connection box body 11) in each of the fuse accommodating chambers 12. And a terminal connected to a male relay terminal (terminal) 19 fitted from above and an electric wire 21 fastened and fixed to the electric wire connection portion 14 by a nut (fastening means) 20 via a bent portion 17b of the bus bar 17. And a plate 22.

As shown in FIG. 2B, the connection box body 11
Each fuse accommodating chamber 12 formed in the connection box main body 11
The bottom wall (bottom portion) 11a of the first member 11 has a substantially rectangular cylindrical space formed by the peripheral wall (side portion) 11b and each partition wall 13. The slits 15 formed in each partition wall 13 extend to near the bottom wall 11a of the connection box main body 11, and a part of the bottom side of each partition wall 13 is left in a rib shape so that each slit 15 is formed. A protrusion 15A is integrally formed at the lower end of the projection. The projections 15A serve as positioning means on the busbar housing chamber 16 side, and are fitted into recesses 17A serving as positioning means on the busbar 17 described later.

As shown in FIG. 1, the electric wire connection portion 14 is constructed by embedding a head portion side of a bolt at one end side of the upper surface of the connection box main body 11 and projecting a shank portion 14a thereof upward. The bus bar 17 and the electric wire 21 are fastened by fixing the bolt shank 14 a of the bolt to the bent portion 17 b of the bus bar 17 through the connection round hole 17 c and the connection round hole 22 a of the terminal plate 22 with the nut 20. And are electrically connected.

As shown in FIGS. 1 and 2A, the bus bar 17 is formed in a substantially rectangular plate shape having a size accommodated in the bus bar accommodating chamber 16, and each of the fuse accommodating chambers above the bus bar 17 is provided. Male terminals 17a are integrally formed at positions opposed to the respective terminals. A bent portion 17b is formed at a position facing the electric wire connection portion 14 of the bus bar 17 by bending it at a right angle. Further, a concave portion (positioning means) is provided at a position opposed to each slit 15 at the lower end of the bus bar 17.
17A are formed respectively. As shown in FIGS. 2A and 2B, the width H of each recess 17A as positioning means on the bus bar 17 side is equal to the width L of each projection 15A as positioning means on the bus bar housing chamber 16 side. It is set to be the same or larger (H ≧ L).

When the bus bar 17 is completely fitted in the bus bar housing chamber 16 of the connection box main body 11, each male terminal 17a of the bus bar 17 is substantially centered on the side of the open end 12a in each fuse housing chamber 12. Are located at the regular positions of
A female terminal (terminal portion) 18a of the fusible link 18 is connected to each male terminal 17a. Further, the bus bar 17 is connected to the bus bar accommodation room 1 of the connection box body 11.
6 are completely fitted in the bus bar 17, a pair of locking portions 17d, 17d formed on substantially both sides of the center of the bus bar 17, and a pair of locking portions formed on the inner surfaces of the respective fuse accommodating chambers 12 on both ends. 12d, 12d are locked, so that the bus bar 17 is completely fitted into the bus bar storage chamber 16 in a locked state.

According to the electric junction box 10 of the embodiment described above,
When assembling the electric connection box 10, the connection box body 11
Of each fuse accommodating chamber 12 and each partition wall 13
The bus bar 17 is fitted into the bus bar accommodating chamber 16 formed from above. At this time, each recess 17A at the lower end of the bus bar 17
Are fitted along the slits 15 of the partition walls 13 so that the recesses 17A of the bus bar 17 are easily and securely fitted to the projections 15A in the slits 15 of the bus bar storage chamber 16 and positioned. . Thereby, bus bar 1
7 can be easily and reliably accommodated in a proper position in the busbar accommodation chamber 16 without lateral displacement. When the bus bar 17 is completely fitted in the bus bar housing chamber 16 in this state, the male terminals 17a integrally formed on the upper side of the bus bar 17 are opened end 12a in each fuse housing chamber 12.
Located in the regular position on the side. This normal position is maintained by the engagement between the pair of locking portions 17d, 17d of the bus bar 17 and the pair of locking portions 12d, 12d in the connection box main body 11, and the bus bar 17 is moved up and down. No movement.

A fusible link 18 is fitted into each of the fuse accommodating chambers 12 from above, and is fitted to each male terminal 17a of a bus bar 17 located at a regular position on the opening end 12a side in each of the fuse accommodating chambers 12. The female terminal 18a of the fusible link 18 is connected. At this time, the bus bar 17 is securely positioned at a proper position by the concave portions 17A and the convex portions 15A as positioning means.
The fusible link 18 is easily and securely fitted into the fuse accommodating chamber 12 of the connection box main body 11 without laterally shifting (longitudinal direction of the bus bar accommodating chamber 16) and rattling. The female terminal 18a of the fusible link 18 is securely connected to each male terminal 17a.

Further, the bus bar 17 is moved to the bus bar accommodation chamber 16.
When the bus bar 17 is completely fitted in the
The shank portion 14a of the electric wire connection portion 14 passes through the round hole 17c. The round hole 22 of the terminal plate 22 is formed in the shank portion 14a.
a, and is fastened and fixed with the nut 20.
The bus bar 17 and the electric wire 21 are connected. Before or after this, a male relay terminal 19 is fitted into each fuse accommodating chamber 12 from below, whereby the assembly of the electric connection box 10 is completed.

As described above, the connection box body 1 of the bus bar 17
The fitting direction of the fusible link 18 into the fuse housing 12 and the fitting direction of the fusible link 18 into the busbar housing chamber 16 are the same from above, and the connection box body 11 of the terminal plate 22 to which the electric wires 21 are connected. Since the connection direction to the electric wire connection portion 14 is also the same direction from above, there is no restriction on the mounting time of the terminal plate 22, the working space can be saved, and the cost can be reduced.

Each of the slits 1 of the busbar accommodating chamber 16
Since the projection 15A below 5 is formed integrally by leaving a part of each partition wall 13 in the form of a rib, the projection 15A serving as the positioning means on the busbar housing chamber 16 side can be formed at low cost. it can. Thereby, the high-quality electric junction box 10 can be manufactured at low cost. Further, since the projections 15A forming the positioning means on the busbar housing chamber 16 side are formed below the slits 15, the positions of the projections 15A of the positioning means on the mating side to be fitted with the recesses 17A of the busbar 17 can be easily determined. Can be confirmed.

Further, each concave portion 17A of the bus bar 17 and a convex portion 15A below each slit 15 of the bus bar accommodating chamber 16 are provided.
The bus bar 17 is moved to the bus bar storage chamber 1
6 can be fitted easily and securely without lateral displacement, so that the space of each fuse accommodating chamber 12 can be effectively used, and the relay terminal 19 can be connected to each fuse accommodating chamber 1
There is an advantage that there is no need to be restricted by space restrictions or mounting timing when fitting into 2.

According to the above-described embodiment, the positioning means is a concave portion cut in a U-shape and a rib-shaped convex portion having a tapered surface on both sides at the upper end to be fitted in the concave portion. It is needless to say that the shape is not limited to the shape, and various shapes such as a concave portion cut into a triangle and a triangular convex portion can be applied. Also, we used fusible links,
Of course, the fuse is not limited to the fusible link.

[0028]

As described above, according to the first aspect of the present invention, the positioning means which engages with the lower side of the bus bar fitted into the bus bar housing chamber of the connection box main body and the bus bar housing chamber. By providing each, when the bus bar is fitted in the bus bar storage chamber, the positioning means of the bus bar and the positioning means of the bus bar storage chamber engage with each other,
The bus bar can be easily and reliably positioned, and the bus bar can be reliably prevented from laterally displacing, so that the fuse can be easily and reliably fitted into the fuse accommodating chamber of the connection box body.

According to the second aspect of the present invention, the positioning means of the bus bar is formed as a concave portion, and the positioning means of the bus bar accommodating chamber is formed as a convex portion, and the concave portion and the convex portion are formed at positions opposed to the respective slits. By fitting each concave portion of the lower end of the bus bar along each slit, each concave portion of the bus bar can be easily fitted and positioned in each convex portion of the bus bar accommodating chamber, and the bus bar can be placed in the bus bar accommodating chamber. And can be easily and reliably accommodated without lateral displacement.

According to the third aspect of the present invention, since the projection of the busbar accommodating chamber is formed by leaving a part of each partition wall, the projection serving as the positioning means can be formed at low cost. As a result, a high quality electrical junction box can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an electric junction box according to an embodiment of the present invention.

2A is a front view of a bus bar used in the electric junction box, and FIG. 2B is a cross-sectional view taken along line XX in FIG.

FIG. 3 is an exploded perspective view showing a conventional electric junction box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electrical connection box 11 Connection box main body 12 Fuse accommodating chamber 12a Open end 13 Partition wall 15 Slit 15A Convex part (positioning means) 16 Busbar accommodating chamber 17 Busbar 17a Male terminal (terminal part) 17A Recess (positioning means) 18 fusible link (fuse)

Claims (3)

[Claims] A plurality of fuse accommodating chambers into which fuses are fitted from above are formed through respective partition walls, and the plurality of fuse accommodating chambers are formed through slits formed at least in the respective partition walls. A connection box main body having a busbar accommodating chamber formed so as to cross the busbar, a busbar for forming a branch circuit fitted into the busbar accommodating chamber from above, and a plurality of busbars integrally formed above the busbar, and In the electric connection box provided with the fuses connected to the terminal portions respectively located on the open ends of the plurality of fuse accommodating chambers when the fitting is completed, the bus bar and the bus bar accommodating chamber are engaged with each other. An electric connection box provided with means. 2. The electric connection box according to claim 1, wherein the bus bar positioning means is a concave portion formed at a lower end of the bus bar at a position facing each of the slits, and the bus bar accommodating chamber is provided with a concave portion. An electric connection box, wherein the positioning means is a projection formed in each of the slits and fitted into the recess. 3. The electrical junction box according to claim 2, wherein the projection is formed by leaving a part of each partition wall.