JP3175638B2 - Busbar mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a bus bar constituting a conductive circuit in an electric junction box, for example.

[0002]

2. Description of the Related Art In general, a bus bar is formed by stamping a single metal plate with a press machine. The bus bar is housed in an electric connection box, a switchboard, or the like, and is used as a conductive circuit for electrically connecting components.

[0003] Busbars vary in shape depending on the application, and are roughly classified into two types, a type called a "flat busbar" and a type called a "vertical busbar". Above all, vertical bus bars are mainly used for common lines such as power supply lines and earth lines.

Hereinafter, a conventional vertical bus bar mounting structure will be described with reference to FIG. The bus bar 110 is an electric connection box 1
00 is inserted into the accommodating portion 103. At this time, the bus bar 110 is inserted between the guide walls 107, and the terminals 111 of the bus bar 110 are inserted into the through holes 102. When the projection 106 of the engaging piece 105 is engaged with the through hole 112 of the bus bar 110, the bus bar 110 is mounted in the housing portion 103 while being prevented from falling off.
The electric connection box 100 is made of a synthetic resin. The distance between the opposing guide walls 107 is the bus bar 1.
10 is set slightly wider than the thickness.

[0005] The electric junction box 100 assembled in this manner.
In, the entire bus bar 110 is held in the housing portion 103. Therefore, the bus bar 110 can be electrically insulated and protected. Moreover, the opposing guide wall 1
Since the interval of 07 is set slightly wider than the thickness of the bus bar 110, there is almost no clearance between the interval between the opposing guide walls 107 and the bus bar 110. Therefore, the bus bar 110 is substantially sandwiched between the opposing guide walls 107, and it is possible to prevent the bus bar 110 from rattling in the housing portion 103. as a result,
Electrical components such as relays and fusible links can be securely mounted on the housing 101.

[0006]

However, since the electric junction box 100 is formed of a synthetic resin, it may be deformed such as warpage. Due to this deformation, when each guide wall 107 is deformed in the accommodating portion 103, since there is almost no clearance between the opposing guide walls 107 and the bus bar 110, it is difficult to attach the bus bar 110 to the electric junction box 100. became. As a result, busbar 1
This was a factor that caused the mounting failure of the ten electrical junction boxes 100.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a bus bar mounting structure capable of being securely mounted.

[0008]

According to the first aspect of the present invention, in the structure for mounting a bus bar mounted on an electric connection box, the electric connection box has a housing portion for housing the bus bar, and the housing portion has a housing portion . the inner wall includes a guide wall for holding the busbars in Ryakukyo deposition states, and an engagement portion for the bus bar engaging, one at each said guide wall to the inner wall of the housing portion each other
So that they are on opposite sides of each engagement piece
The gist of the invention is that the guide wall is formed and a guide slope for guiding the bus bar to the engaging portion is provided on the guide wall so as to extend from an end of the guide wall to a position immediately near the engaging portion.

According to a second aspect of the present invention, in the busbar mounting structure according to the first aspect, the gist is that the clearance comprises a tapered surface provided on a guide wall.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Electrical junction box 10
Is made of a synthetic resin and has a plurality of housings 1 on its upper surface.
1a to 11d. Each housing 11a to 11
“d” has a box shape whose upper surface is opened and whose upper surface is the bottom surface of the electric connection box 10. Two through holes 12 are provided on the bottom surface of each of the housings 11a to 11d.

On the lower surface of the electric connection box 10, a housing portion 13 communicating with each through hole 12 and accommodating a bus bar 20 described later is provided.
Is provided. Engagement pieces 15a to 15d having projections 16a to 16d are formed on the inner wall 13a of the housing 13 corresponding to the through holes 12 of the housings 11a to 11d, respectively. Each of the engagement pieces 15a to 15d is
The projections 16a to 16d are formed at the upper ends of the engagement pieces 15a to 15d.

A substantially rectangular column-shaped guide wall 17 is provided on each of the inner walls 13a and 13b of the housing portion 13 on both sides of each of the engagement pieces 15a to 15d so as to correspond to each of the engagement pieces 15a to 15d.
a to 17d are formed. That is, as shown in FIG. 3, the guide walls 17 a to 17 d
Are formed on each of the inner walls 13a and 13b of the accommodating portion 13, and each of the through holes 12 and each of the engagement pieces 15a to 15d
Are formed so as to surround the four sides, and the surrounded portion forms each terminal accommodating portion 14. Each guide wall 17a
17d are provided with tapered surfaces 18a to 18d as guide inclined surfaces from the vicinity of the center to the lower edge. At this time, the interval between the opposing guide walls 17 a to 17 d is set slightly wider than the thickness of the bus bar 20.

In the electric connection box 10 and the bus bar 20 configured as described above, the bus bar 20 is connected to the electric connection box 1.
0 is inserted into the accommodating portion 13. At this time, bus bar 2
0 is the tapered surface 18a of each of the guide walls 17a to 17d.
Guide walls 17a to 17d opposed by being guided by 18d
And each terminal 21 of the bus bar 20 is inserted into each through hole 1.
Inserted into 2. And, each through hole 22 of the bus bar 20
By engaging the projections 16a to 16d of the engagement pieces 15a to 15d with the bus bar 20, the bus bar 20 is mounted in the housing portion 13 in a state where the bus bar 20 is retained and retained.

Next, the operation and effect of this embodiment will be described. -The guide walls 17a to 17d are provided with tapered surfaces 18a to 18d, respectively, from the lower end to the center of the guide walls 17a to 17d. Therefore, each of the opposing guide walls 17a to 17a
A portion where there is little clearance between the bus bar 20 and the interval of 7d is short. Therefore, when the bus bar 20 is mounted in the housing portion 13, a wide clearance is generated between the opposing guide walls 17a to 17d and the bus bar 20. As a result, even when the electric connection box 10 is deformed such as warpage, the bus bar 20 can be easily mounted in the housing portion 13.

Since the tapered surfaces 18a to 18d of the guide walls 17a to 17d are provided from the lower ends of the guide walls 17a to 17d to substantially the center, the tapered surfaces 1a to 17d are provided.
The angles 8a to 18d are set to acute angles. Therefore, when mounting the bus bar 20 in the accommodation part 13, the bus bar 20 does not get caught on each of the guide walls 17a to 17d. As a result, the bus bar 20 can be more easily and reliably mounted in the housing 13.

The above embodiment may be modified as follows, and the same operation and effect can be obtained in such a case. As shown in FIG. 4, each guide wall 17 of the above embodiment
a to 17d may be changed to the respective guide walls 31a to 31d. Each guide wall 31a-31d is connected to each guide wall 17a-
The tapered surfaces 18a to 18d are omitted from 17d. Even in this case, even when the electric connection box 10 is deformed such as warpage, the bus bar 20 is not
Can be easily installed inside.

In the above embodiment, each guide wall 17a
17d is formed on each of the inner walls 13a and 13b of the housing portion 13 so that each of the engagement pieces 15a
It surrounds all sides of ~ 15d. As shown in FIG. 5 (a), each of these guide walls 17a to 17d, each of the inner wall 1
3a and 13b, one for each of the engagement pieces 15a to 1
It is formed so as to form a diagonal of 5d. However, at this time, the adjacent guide walls 17a to 17d are connected to the alternate inner wall 13.
a, 13b (for example, if the guide wall 17a adjacent to the guide wall 17b is formed on the inner wall 13a,
The guide wall 17b is formed on the inner wall 13b).

Also in this case, the bus bar 20 is substantially sandwiched between the guide walls 17a to 17d formed diagonally on the inner walls 13a and 13b of the housing 13. Therefore, the rattle of the bus bar 20 in the accommodation section 13 can be prevented. In addition, in this case, the number of formed guide walls 17a to 17d can be reduced, so that the material cost can be reduced. Each guide wall 17a to 17d is connected to each guide wall 32a shown in FIG.
It may be changed to ~ 32d.

In the above embodiment, the guide walls 17a to 17d are formed in the accommodating portion 13 of the electric junction box 10, but this is changed to the guide walls 41 shown in FIG. 5B . The cross-sectional shape of each of the guide walls 41 is equal to the cross-sectional shape of each of the guide walls 17a to 17d, and each of the guide walls 41 has a shape in which each of the guide walls 17a to 17d extends in the longitudinal direction of the housing portion 13.

In this way, rattling of the bus bar 20 in the housing 13 can be more reliably prevented. The cross-sectional shape of each guide wall 41 may be equal to the cross-sectional shape of each of the guide walls 31a to 31d.

[0021]

According to the first aspect of the present invention, it is possible to prevent rattling of the bus bar in the housing portion, and to securely place the bus bar in the housing portion even if the electric connection box is deformed such as warpage. Can be mounted on

According to the second aspect of the present invention, the bus bar can be securely mounted in the container without being caught on the guide wall.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment.

FIG. 2 is an essential part cross-sectional view of one embodiment as viewed from a longitudinal direction.

FIG. 3 is a sectional view of an essential part taken along line AA of FIG. 2;

FIG. 4 is a sectional view of a main part of another embodiment.

FIG. 5 is a bottom view of a main part of another embodiment.

FIG. 6 is a sectional view of a main part of a conventional embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Electric junction box, 13 ... Accommodation part, 15a-15d ... Engagement piece, 17a-17d ... Guide wall, 18a-18d ... Taper surface as a guide slope, 20 ... Bus bar.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02G 3/16 H01R 4/58

Claims (2)

(57) [Claims] 1. A mounting structure for a bus bar mounted on an electric connection box, wherein the electric connection box has a housing portion for housing a bus bar,
The inner wall of the housing portion includes a guide wall for holding the busbars in Ryakukyo deposition states, and an engagement portion for the bus bar and engaging the respective one by one to each other differences the guide wall to the inner wall of the housing portion
And at the opposite corner of each engaging piece
And mounting structure of the the guide wall, busbar provided with a guide slope for guiding the bus bar to the engagement portion so as to extend from the end portion of the guide wall to the nearest of the engagement portion. 2. The bus bar mounting structure according to claim 1, wherein the guide slope forms a clearance between the guide wall and the bus bar.