JP4099424B2 - Busbar positioning structure and electrical junction box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a positioning structure between bus bars arranged to face each other, and an electrical junction box using the positioning structure.
[0002]
[Prior art]
For example, an electrical junction box mounted on a vehicle constitutes a branch circuit for distributing and supplying vehicle power to each load, and this distribution circuit is formed by a bus bar having high rigidity and conductivity. As the configuration of such an electrical junction box, a first bus bar integrally formed with one fuse terminal, a second bus bar integrally formed with the other fuse terminal, and the like are fixed to the second bus bar. The first bus bar and the second bus bar are positioned at appropriate positions by assembling the first bus bar to the bus bar insulating block body. The first bus bar and the second bus bar assembled in this way are accommodated in the case.
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 5-54787
[Problems to be solved by the invention]
By the way, as a structure for assembling the first bus bar and the bus bar insulating block body at an appropriate position, the first bus bar is fitted into the surface on which the first bus bar of the bus bar insulating block body is assembled, and is recessed one step from the surrounding surface. In general, a concave groove is formed, and the first bus bar and the bus bar insulating block body are assembled to each other at an appropriate position by fitting the first bus bar into the concave groove.
[0005]
However, in the positioning structure described above, it is necessary to align the first bus bar and the recessed groove of the bus bar insulating block body as a whole, and the concave portion of the bus bar insulating block body has a depth about the thickness of the first bus bar. Since it is formed, it may not be easy to determine whether or not the first bus bar is completely fitted in the recess of the bus bar insulating block body, and there is a problem that the assembling workability is poor. If the first bus bar and the bus bar insulating block body are not assembled at an appropriate position, the first bus bar and the second bus bar are not arranged at an appropriate position. Then, for example, a pair of fuse terminals formed between both bus bars are in a misaligned state, causing a problem such as a defective mounting of the fuse.
[0006]
Therefore, the present invention has been made to solve the above-described problems, and the first bus bar and the insulating block body can be assembled easily and surely in an appropriate state. The first bus bar and the second bus bar It is an object of the present invention to provide a positioning structure between bus bars and an electrical junction box that can properly position each other.
[0007]
[Means for Solving the Problems]
The invention of claim 1 includes a first bus bar, a second bus bar, and a bus bar assembly including the second bus bar, and the first bus bar and the second bus bar are assembled to an inner cover by assembling the first bus bar and the second bus bar. A positioning structure between the bus bars in which the first bus bar and the second bus bar are positioned at the respective installation positions, wherein the inner cover is an outer periphery of a circuit component arranged in the first bus bar or the second bus bar. The first bus bar and the second bus bar are respectively formed with paired fuse terminals, the first bus bar and the inner cover each having a first positioning hole and the other one. The first positioning projections are respectively provided in the second positioning holes, the second positioning holes are provided in one of the bus bar assembly and the inner cover, and the second positioning projections are provided in the other. And wherein the door.
[0008]
In the positioning structure between the bus bars, when the first bus bar and the inner cover are assembled, the insertion of the first positioning projection into the first positioning hole can be assembled as an assembling position reference.
[0010]
Further, in this positioning structure between the bus bars, as in the case of the assembly of the first bus bar and the bus bar insulating block body, the second position of the inner cover is determined by inserting the second positioning projection into the second positioning hole. Since the bus bar can be assembled, the assembly accuracy between the first bus bar and the second bus bar is improved.
[0012]
Further, in the positioning structure between the bus bars , the paired fuse terminals are arranged at appropriate positions.
[0013]
The invention according to claim 2 is the bus bar positioning structure according to claim 1 , wherein the first bus bar is fitted into the inner cover, and a bus bar fitting recess that is recessed by one step from the surrounding surface is formed. It is characterized by being.
[0014]
In the positioning structure between the bus bars, in addition to the operation of the first aspect of the invention, the first bus bar and the bus bar insulating block body are assembled by fitting the first bus bar into the bus bar fitting recess of the inner cover.
[0015]
According to a third aspect of the present invention, there is provided the positioning structure between the bus bars according to the first or second aspect , wherein the first positioning hole is provided in the first bus bar, and the first positioning projection is provided in the inner cover. It is characterized by.
[0016]
In the positioning structure between the bus bars, the same operation as that of the invention of claim 1 or claim 2 can be obtained.
[0017]
According to a fourth aspect of the invention, there is provided the bus bar positioning structure according to the first to third aspects.
[0018]
In this electrical junction box, the same operation as that of the first to third aspects of the invention can be obtained by the internal positioning structure.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0020]
1 to 4 show the bus bar positioning structure of the present invention applied to a bus bar accommodated in an electrical junction box. FIG. 1 is an exploded perspective view of the electrical junction box 1, and FIG. FIG. 3 is a perspective view of an integrated prototype bus bar 12 in the manufacturing process of the first bus bar 2, and FIG. 3 is a cross-sectional view of the electrical connection box 1 in a state where the first bus bar 2, the inner cover 5, and the second bus bar 3 are assembled. 4 (a) is a perspective view before assembling the first bus bar 2 and the inner cover 5, FIG. 4 (b) is a perspective view of the assembled state of the first bus bar 2 and the inner cover 5, and FIG. 5 shows the positioning structure. It is sectional drawing of the electrical-connection box 1 of the state which assembled | attached the 1st bus bar 2, the inner cover 5, and the 2nd bus bar 3 included.
[0021]
As shown in FIG. 1 and FIG. 2, the electrical junction box 1 includes a first bus bar 2, a bus bar assembly 4 in which the second bus bar 3 is assembled, and the bus bar assembly 4. 6, an inner cover 5 covering the first bus bar 2, a case 7 in which the first bus bar 2, the bus bar assembly 4 and the inner cover 5 are accommodated, a fuse cavity 8 assembled above the case 7, and a predetermined inside of the fuse cavity 8 It is composed of four fuse components 9 mounted on fuse terminals 11 and 18 arranged at positions.
[0022]
The first bus bar 2 is formed by press-molding a rigid conductive sheet metal into a predetermined shape, the power terminal 10 is formed at the lower end, and the fuse terminals 11 are formed at the four positions at the upper end.
[0023]
When producing the bus bar assembly 4 , first, a rigid conductive sheet metal is press-molded into a predetermined shape to produce the integrated original bus bar 12 shown in FIG. 3 . Next, the bus bar supporting resin body 13 is insert-molded into the integral prototype bus bar 12 to create an insert molded product, and a predetermined portion of the integral prototype bus bar 12 of the insert molded product is cut to obtain a desired relay wiring path body. A second bus bar 3 is formed. The bus bar assembly 4 is formed by fixing the coil 15 and the switch (not shown) of the relay component 6 to the second bus bar 3. The bus bar assembly 4 produced in this way has four sets of control terminals 16 and output terminals 17 formed at the lower end, fuse terminals 18 formed at four positions at the upper end, and relay parts at the central portion. Six coils 15 and a switch (not shown) are fixed.
[0024]
1 and 2, the inner cover 5 is formed of a resin material, and the bus bar supporting resin body 13 covers the entire outer periphery of the coil 15 and the switch (not shown) of the four sets of relay parts 6. It is fixed to. The bus bar supporting resin body 13 and the inner cover 5 are configured as a bus bar insulating block body 14 fixed to the second bus bar 3, and are arranged on the outer surface side of the inner cover 5 via the positioning means A between the bus bars. The bus bar 2 is assembled in a positioning state. The configuration of the positioning means A will be described later.
[0025]
The case 7 has a rectangular shape in which the upper surface side and the lower surface side are penetrated, and the lower portion is formed as a connector cavity 7a. In the case 7, the first bus bar 2 and the second bus bar 3 are accommodated from the opening on the upper surface side in an assembled state. In the connector cavity 7a, the power supply terminal 10 of the first bus bar 2 and the four sets of control terminals 16 and output terminals 17 of the second bus bar 3 are arranged.
[0026]
The fuse cavity 8 is mounted on the upper surface side of the case 7, is formed at four positions of the plate portion 8 a that closes the upper surface opening of the case 7, and the plate portion 8 a, and is disposed at a position facing each pair of fuse terminals 11 and 18. Fuse mounting portion 8b.
[0027]
Next, the positioning means A between the bus bars will be described. As shown in detail in FIGS. 4A, 4B and 5, the positioning means A includes a first positioning hole 20 formed in the first bus bar 2 and the first bus bar 2 of the inner cover 5. And a first positioning protrusion 21 inserted into the first positioning hole 20 and formed on the surface on which the first bus bar 2 of the inner cover 5 is disposed. 2 and a bus bar fitting recess 22 that is recessed by one step from the surrounding surface. The positioning means A protrudes from the second positioning hole 20 ′ formed in the bus bar assembly 4 and the rear surface side of the surface on which the first bus bar 2 of the inner cover 5 is arranged, and the second positioning hole 20. 'Has a second positioning projection 21' to be inserted. The second positioning hole 20 ′ may be formed only in the bus bar support resin body 13 of the bus bar assembly 4 or may be formed in both the bus bar support resin body 13 and the second bus bar 3.
[0028]
Next, the assembly work of the electrical junction box 1 will be described. The inner cover 5 is assembled to the bus bar supporting resin body 13 of the bus bar assembly 4 to which the second bus bar 3 is fixed. Here, as shown in FIG. 5, the second positioning projection 21 ′ of the bus bar assembly 4 is inserted into the second positioning hole 20 ′ of the inner cover 5 for alignment, and the bus bar is positioned at a predetermined position of the inner cover 5. Assemble the assembly 4. A bus bar insulating block body 14 is constituted by the bus bar supporting resin body 13 and the inner cover 5.
[0029]
Next, as shown in FIG. 4A, the first bus bar 2 is aligned with the outer surface of the inner cover 5, and as shown in FIG. Both the first bus bar 2 and the second bus bar 3 are assembled by inserting the first positioning projection 21 of the cover 5 and fitting the first bus bar 2 into the bus bar fitting recess 22 of the inner cover 5. The assembly is inserted into the case 7. Next, the fuse cavity 8 is mounted on the upper surface of the case 7, and the fuse 9 is mounted on each fuse mounting portion 8 b of the fuse cavity 8.
[0030]
In the above assembling process, when the first bus bar 2 and the bus bar insulating block body 14 are assembled, the first positioning protrusion 21 of the inner cover 5 is inserted into the first positioning hole 20 of the first bus bar 2. Since it can be assembled as a reference, the first bus bar 2 and the bus bar insulating block body 14 can be easily and reliably assembled in an appropriate state, and the first bus bar 2 and the second bus bar 3 are properly positioned.
[0031]
Moreover, in the said embodiment, since the 2nd bus bar can be assembled | attached to an internal cover on the basis of an assembly position by inserting the 2nd positioning protrusion in a 2nd positioning hole, the assembly | attachment precision between a 1st bus bar and a 2nd bus bar Will improve.
[0032]
In the above embodiment, since the terminals of the first bus bar 2 and the terminals of the second bus bar 3 include the paired fuse terminals 11 and 18, the paired fuse terminals 11 and 18 are positioned at appropriate positions. Due to the arrangement, it is possible to prevent the installation failure of the fuse 9.
[0033]
In the above-described embodiment, the first bus bar 2 is formed in the inner cover 5 of the bus bar insulating block body 14 because the first bus bar 2 is fitted therein and the bus bar fitting recess 22 is formed one step lower than the surrounding surface. Are assembled in a state of being fitted into the bus bar fitting recess 22 of the bus bar insulating block body 14, so that the first bus bar 2 and the bus bar insulating block body 14 are reliably and firmly positioned.
[0034]
In the embodiment described above, the first positioning hole 20 is provided in the first bus bar 2 and the first positioning projection 21 is provided in the inner cover 5 of the bus bar insulating block body 14, but conversely, the first positioning projection 21 is provided in the first bus bar 2. Alternatively, the first positioning holes 20 may be provided in the inner cover 5 of the bus bar insulating block body 14.
[0035]
【The invention's effect】
As described above, according to the invention of claim 1, the first bus bar, the second bus bar, and the bus bar assembly including the second bus bar are provided, and the first bus bar and the A positioning structure between the bus bars in which the first bus bar and the second bus bar are positioned at the respective installation positions by assembling the second bus bar, and the first bus bar and the inner cover are arranged in either one of the first bus bar and the inner cover. Since the first positioning hole is provided on the other side and the first positioning protrusion is provided on the other side, when the first bus bar and the bus bar insulating block body are assembled, the first positioning protrusion is inserted into the first positioning hole as an assembly position reference. Since the first bus bar and the inner cover can be assembled easily and reliably in an appropriate state, the first bus bar and the second bus bar are It is properly positioned in the stomach.
[0036]
Further , since the second positioning hole is provided in one of the bus bar assembly and the inner cover and the second positioning projection is provided in the other, the first bus bar and the inner cover are provided in the same manner as in the assembly of the first bus bar and the inner cover. Since the second bus bar can be assembled to the inner cover using the second positioning projection inserted into the two positioning holes as an assembling position reference, the assembling accuracy between the first bus bar and the second bus bar is improved.
[0037]
Further, since the first bus bar and the second bus bar are respectively formed with a pair of fuse terminals , the paired fuse terminals are arranged at appropriate positions, so that it is possible to prevent the mounting failure of the fuse.
[0038]
According to a second aspect of the present invention, there is provided the bus bar positioning structure according to the first aspect, wherein the first bus bar is fitted into the inner cover, and the bus bar fitting recess is formed one step lower than the surrounding surface. Therefore, in addition to the effect of the invention of claim 1, since the first bus bar and the inner cover are assembled by fitting the first bus bar into the bus bar fitting concave portion of the inner cover, the first bus bar is securely and firmly attached. Is positioned.
[0039]
According to a third aspect of the present invention, in the positioning structure between the bus bars according to the first or second aspect , the first positioning hole is provided in the first bus bar, and the first positioning projection is provided in the inner cover. The effect similar to that of the invention of claim 1 or claim 2 can be obtained.
[0040]
According to the invention of claim 4, since an electrical connection box having a positioning structure between bus bars of claims 1 to 3, wherein, the invention of claims 1 to 3 by the positioning structures in the electrical connection box The same effect can be obtained.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an electrical junction box according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the electrical junction box 1 in a state where the first bus bar including the fuse terminal, the inner cover, and the second bus bar are assembled according to the embodiment of the present invention.
FIG. 3 is a perspective view of an integrated prototype bus bar showing the embodiment of the present invention, which is a manufacturing process of the first bus bar.
4A and 4B show an embodiment of the present invention, in which FIG. 4A is a perspective view before the first bus bar and the inner cover are assembled, and FIG. 4B is a perspective view of the assembled state of the first bus bar and the inner cover; .
FIG. 5 is a cross-sectional view of the electrical junction box 1 in a state in which the first bus bar 2 including the positioning structure, the inner cover 5 and the second bus bar 3 are assembled according to the embodiment of the present invention.
[Explanation of symbols]
1 Electrical connection box 2 1st bus bar 3 2nd bus bar 5 Internal cover (component of bus bar insulation block)
9 Fuse 11, 18 Fuse terminal 13 Busbar support resin body (component parts of busbar insulation block body)
14 Busbar insulating block body 20 First positioning hole 21 First positioning protrusion 22 Busbar fitting recess

Claims (4)

A first bus bar; a second bus bar; and a bus bar assembly including the second bus bar. The first bus bar and the second bus bar are assembled by assembling the first bus bar and the second bus bar to an inner cover. A bus bar positioning structure in which the bus bars are positioned at each other's installation position,
The inner cover is formed so as to cover an outer periphery of a circuit component disposed in the first bus bar or the second bus bar,
The first bus bar and the second bus bar are respectively formed with a pair of fuse terminals,
A first positioning hole is provided in one of the first bus bar and the inner cover, and a first positioning protrusion is provided in the other.
A bus bar positioning structure, wherein a second positioning hole is provided in one of the bus bar assembly and the inner cover, and a second positioning projection is provided in the other. A positioning structure between bus bars according to claim 1 ,
A bus bar positioning structure, wherein the inner cover is formed with a bus bar fitting recess into which the first bus bar is fitted and recessed by one step from the surrounding surface. A positioning structure between bus bars according to claim 1 or 2 ,
A positioning structure between bus bars, wherein the first bus bar is provided with the first positioning hole, and the inner cover is provided with a first positioning projection. An electrical junction box comprising the bus bar positioning structure according to claim 1 .

Images