JP2000299912A - Bus bar connecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the production cost and improve adaptability, by providing together first and second bus bar pieces having fitting parts formed at a given pitch and by electrically connecting both pieces arranged perpendicularly. SOLUTION: As bus bars band of copper or copper alloy in which U-shaped fitting parts 15a or to-be-fitted parts 16a are formed in the direction of length or thickness at the respective pitches of P1, P2, first bus bar pieces 15 (A, B, E) or second bus bar pieces 16 (A, B) are provided which are cut in such a way that each has appropriate number of the fitting parts 15a or to-be-fitted parts 16a. The second bus bar pieces 16 are arranged in the perpendicular direction to the first bus bar pieces 15. To-be-fitted parts of the second bus bar pieces 16 are fitted into the fitting parts 15a of the first ones 15 from the top side so that they can be electrically connected. The U-shaped formation of the fitting parts 15a and to-be-fitted parts 16a and the relative structure of locking holes and locking projections not only eliminate the positional displacement of the fitting parts 15a in relation to the to-be-fitted parts 16a, but prevent the unprepared detachment of the fitted portions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure for a bus bar housed in an electric connection box.

[0002]

2. Description of the Related Art An electrical junction box used for branch connection of an automobile wire harness or the like to various electrical components has a branch connection point concentrated in one place, and the wiring is rationally and economically branched. With the increase in the density of wire harnesses, various types have been developed according to vehicle types or applications.

[0003] As shown in FIG. 9, a bus bar 7A is formed from a hoop material 6 by a press die as shown in FIG.
To 7C, and each of the bus bars 7A to 7C
The tab terminals 7a and 7b are cut and raised from the pattern portion in the vertical direction, and insulating plates 8A to 8C are interposed between the bus bars 7A to 7C, respectively. And a lower case 9B. In addition, 10 is a relay terminal, 11, 12
Is a relay and a fuse.

[0004]

However, since each of the bus bars 7A to 7C has a different shape of the pattern portion, it is necessary to punch each of the bus bars 7A to 7C with a dedicated press die. If the electrical connection box of the same vehicle type is different in grade, the shape of the bus bar pattern portion is different, so that there is a problem that there is no flexibility.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to provide a bus bar connection structure which can be manufactured at low cost and has excellent flexibility.

[0006]

According to a first aspect of the present invention, there is provided a connection structure for a bus bar housed in an electric connection box, wherein a bus bar is formed at a predetermined pitch. One bus bar piece is arranged side by side, a second bus bar piece having a fitting portion formed at a predetermined pitch is arranged side by side, and the second bus bar piece is arranged in a direction orthogonal to the first bus bar piece. The fitted portion of the second busbar piece is the first
Another object of the present invention is to provide a bus bar connection structure characterized by being fitted into a fitting portion of a bus bar piece to be electrically connected.

According to the first aspect, the second bus bar having the fitted portion is formed with respect to the first bus bar piece having the fitted portion.
The bus bar pieces are arranged in the orthogonal direction, and the fitted portion of the second bus bar piece is fitted into the fitted portion of the first bus bar piece so as to be electrically connected. Therefore, it is only necessary to combine and arrange the bus bar pieces. A bus bar can be configured.

According to a second aspect, the first busbar piece and the second busbar piece are connected to each other.
Layers in combination with the bus bar pieces are laminated, and a third bus bar piece having a fitting portion formed at a predetermined pitch is provided, and the third bus bar pieces are arranged in the laminating direction,
If the fitting portion of the third bus bar piece is fitted into the fitting portion of the upper and lower first bus bar pieces so as to be electrically connected, the upper and lower first bus bar pieces are fitted into the fitting portion. It can be electrically connected only by fitting the fitted portion of the third bus bar piece into the third bus bar piece.

According to a third aspect of the present invention, the fitting portion and the fitted portion are formed in a U-shape, and a lock hole is formed on one side and a lock is engaged with the lock hole on the other side. With the configuration in which the projection is formed, there is no displacement between the fitted portion and the fitted portion.

According to a fourth aspect of the present invention, the fitting portion is formed in a U shape, and a lock hole is formed in a side surface, and the fitted portion is formed in an I shape, and the lock hole is formed in a side surface. In this case, the second bus bar piece can be easily processed.

According to a fifth aspect of the present invention, if the entrance width of the fitting portion is set to be smaller than the thickness of the fitting portion, the contact load when the fitting portion is fitted into the fitting portion is reduced. Get higher.

According to a sixth aspect of the present invention, there is provided a connection structure for a bus bar housed in an electric junction box, wherein the first bus bar pieces having the press contact blades formed at a predetermined pitch are arranged side by side and at a predetermined pitch. The first electric wires are arranged side by side, and the first electric wires are arranged in a direction orthogonal to the first bus bar pieces, so that the first electric wires are pressed against the press-contact blades of the first bus bar pieces to be electrically connected. A bus bar connection structure is provided.

[0013] According to the sixth aspect, the first in which the press contact blade is formed.
With respect to the bus bar piece, the first electric wire is arranged in the orthogonal direction,
Since the first electric wires are pressed against the pressure contact blades of the first bus bar pieces to be electrically connected, the bus bar can be configured only by arranging the bus bar pieces and the electric wires in combination.

According to a seventh aspect of the present invention, the first bus bar piece is formed with a pressure contact blade in a right angle direction, and a layer of a combination with the first electric wire pressed against the upward pressure contact blade is laminated.
The second electric wire is arranged in the stacking direction, and the second electric wire is pressed into contact with the lateral press-contact blades of the upper and lower first bus bar pieces to be electrically connected to each other. The first bus bar piece can be electrically connected only by pressing the second electric wire against the press contact blade.

According to the present invention, the first bus bar piece is provided with a press-contact blade in the longitudinal direction, and a layer of a combination with the first electric wire pressed against the press-contact blade is laminated.
The second electric wire is arranged in the laminating direction, and the second electric wire is bent so that the second electric wire is press-contacted with the press-contact blade in the longitudinal direction of the upper and lower first bus bar pieces to be electrically connected. The height (thickness) of the first bus bar piece is reduced by the length of the press contact blade in the length direction.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 4 show a first embodiment. As shown in FIG. 1, a strip busbar made of copper or copper alloy having a U-shaped fitting portion 15a formed in a length direction at a predetermined pitch P1. Is manufactured, and the strip-shaped bus bar is inserted into the fitting portion 15.
First bus bar pieces 15 (A to J) are provided by cutting a in an appropriate number (for example, 2, 3, 5, etc.).

Further, a copper or copper alloy band bus bar having a U-shaped fitting portion 16a formed in the thickness direction at a predetermined pitch P2 is manufactured, and the band bus bar is fitted with the fitting portion 16a. The second bus bar pieces 16 (A to E) cut in units of the number (for example, 2, 3, 5, etc.) are provided.

Further, U at a predetermined pitch P3 in the height direction.
A strip-shaped bus bar made of copper or a copper alloy having a V-shaped fitting portion 17a formed therein is manufactured, and the strip-shaped bus bar is cut into appropriate numbers of fitting portions 17a (for example, two or three). The third bus bar pieces 17 (A to C) are provided.

The first bus bar piece 15 has a fitting portion 15a.
Is the pitch P of the fitted portion 16a of the second bus bar piece 16.
Appropriate numbers are juxtaposed in the same layer at intervals corresponding to 2. For example, as the first layer, two first bus bar pieces 15A and 15B are arranged in parallel in the example of FIG.
The first busbar pieces 15A, 15B, 15C, 15D of the book are arranged side by side.

The second bus bar piece 16 is the first bus bar piece 1.
In the same layer, an appropriate number of them are arranged side by side at intervals corresponding to the pitch P1 of the fitting portions 15a. The second bus bar pieces 16 are arranged in a direction orthogonal to the first bus bar pieces 15. For example, as the first layer, two second bus bar pieces 16A and 16B are arranged side by side in the example of FIG. 1, and two second bus bar pieces 16A and 16B are arranged side by side in the example of FIG.

Then, as shown in FIG.
When the fitting portion 16a of the bus bar piece 16 is fitted into the fitting portion 15a of each first bus bar piece 15 from above (see arrow a), as shown in FIG. 2B, each first bus bar piece 15 and each 2 bus bar pieces 16 are electrically connected,
It can be assembled as a first-layer bus bar.

Similarly, as shown in FIG. 4, the second bus bar is assembled with the first bus bar pieces 15E to 15G and the second bus bar piece 16C, and the first bus bar pieces 15H to 15J and the second bus bar piece With busbar pieces 16D and 16E,
Assemble the third layer busbar. The fourth and subsequent layers are assembled in the same manner.

The busbars of the respective layers are stacked at intervals corresponding to the pitch P3 of the fitted portion 17a of the third busbar piece 17 arranged in the stacking direction, and are stacked as shown in FIG.
Similarly to (b), the fitting portion 1 of the third bus bar piece 17 is fitted.
7a is fitted into the fitting portion 15a of the first bus bar piece 15 of each layer from the side (see the arrow b), as shown in FIG. 1, the first bus bar piece 15A of the first layer and the second bus bar piece 15A Is electrically connected to the first bus bar piece 15E so that it can be assembled as a multilayer bus bar. In the example of FIG. 4, three third bus bar pieces 17A to 17C electrically connect the first bus bar pieces 15A and 15B of three layers. In addition, as shown in FIG. 4, only the second bus bar piece 16 </ b> C is shown, and the fitting parts 16 a, 17 a of the second bus bar piece 16 or the third bus bar piece 17 are orthogonal to the fitting part 15 a of the first bus bar piece 15. It is possible to fit not only in the direction but also in an oblique direction.

On the other hand, on both sides of the U-shaped fitting portion 15a of the first bus bar piece 15, lock holes 15b are formed, and the second bus bar piece 16 and the third bus bar piece 1 are formed.
The U-shaped fitting portions 16a, 17a of the U-shaped fitting portions 16a, 17a are fitted to the fitting portions 15a.
Lock projections (embosses) 16b and 17b are formed to engage with the lock holes 15a when are fitted.

According to the configuration of the first embodiment, the second bus bar piece 16 is disposed orthogonally to the first bus bar piece 15, and the fitted portion 16a of the second bus bar piece 16 is placed in the first bus bar piece 16.
When the bus bar piece 15 is fitted into the fitting portion 15a from above, the first bus bar piece 15 and the second bus bar piece 16 can be electrically connected.

Therefore, since the busbars of the same layer are merely arranged by combining the busbar pieces 15 and 16, it is not necessary to punch out the busbars with a dedicated press die as in the prior art, and the manufacturing cost is reduced. By simply combining the bus bar pieces 15 and 16, it is possible to cope with any shape of the pattern portion of the bus bar, so that the flexibility is remarkably improved.

Further, if the fitting portions 17a of the third bus bar pieces 17 are fitted into the fitting portions 15a of the upper and lower first bus bar pieces 15, respectively, the upper and lower first bus bar pieces 15 are electrically connected. become able to.

Therefore, the upper and lower first bus bar pieces 15 can be electrically connected only by fitting the fitting portion 17a of the third bus bar piece 17 into the fitting portion 15a. It ’s easier to get used to,
Lower cost.

The fitting portion 15 of the first bus bar piece 15
When the fitting portions 16a, 17a of the second bus bar piece 16 and the third bus bar piece 17 are fitted in the fitting portion 15a, the fitting portion 15a is expanded and the fitted portions 16a, 17a are expanded.
Are pressed and narrowed, so that each of them acts as a spring to generate a contact load, so that reliable electrical connection can be obtained.

Further, a lock hole 15b is formed in the fitting portion 15a of the first bus bar piece 15, and the second bus bar piece 16
And the respective fitted portions 16a, 17 of the third bus bar piece 17
Since the lock projections 16b and 17b are formed on the position a, there is no displacement between the fitting portion 15a and the fitted portions 16a and 17a, and there is no danger that the fitting may come off accidentally.

As shown in FIG. 3, the second bus bar piece 16 is inserted into the fitting portion 15a of the first bus bar piece 15.
And the respective fitted portions 16a, 17 of the third bus bar piece 17
It is also possible to fit a in the opposite direction. It is also possible to form a lock projection on the fitting portion 15a of the first bus bar piece 15, and to form a lock hole on each of the fitted portions 16a, 17a of the second bus bar piece 16 and the third bus bar piece 17.

FIGS. 5 and 6 show a second embodiment.
As shown in FIG. 5, the first bus bar piece 15 having the fitting portion 15a has substantially the same structure as that of the first embodiment, but the entrance width W of the fitting portion 15a is different from that of the second bus bar piece 16 and the third bus bar piece 17. It is set narrower than the plate thickness T.

Unlike the first embodiment, the second busbar piece 16 has no U-shaped fitting portion 16a, and the second busbar piece 16 itself has an I-shaped fitting portion 16a.
Is formed.

Further, unlike the first embodiment, the third bus bar piece 17 has no U-shaped fitting portion 17a,
The third bus bar piece 17 itself has an I-shaped fitting portion 17a.
Is formed.

According to the structure of the second embodiment, it is not necessary to form the U-shaped fitting portions 16a and 17a on the second bus bar piece 16 and the third bus bar piece 17, so that the processing can be easily performed and the parts can be easily formed. Lower costs.

The fitting portion 1 of the first bus bar piece 15
Since the entrance width W of 5a is set smaller than the thickness T of the fitting portions 16a, 17a of the second busbar piece 16 and the third busbar piece 17, the second busbar is fitted to the fitting portion 15a of the first busbar piece 15. Piece 16 and third busbar piece 17
When each of the fitting portions 16a, 17a is fitted, the fitting portion 15a is spread out, so that it becomes a spring to generate a contact load, so that reliable electrical connection can be obtained.

The fitting portion 1 of the first bus bar piece 15
If lock holes 15b are formed on both side surfaces of 5a, the second
Lock projection 16 of fitting portion 16a of bus bar piece 16
This is advantageous because the direction of b can be either direction and the directionality is not restricted.

FIG. 7 shows a third embodiment, in which press contact blades 15c and 15d are formed at right angles to the first bus bar pieces 15 (K to M) bent in an L-shape.

Then, the first bus bar pieces 15K of the same layer,
In 15L, the first electric wire 18 arranged in the orthogonal direction is press-contacted to the upward press-contact blade 15c to be electrically connected,
In the upper and lower first bus bar pieces 15L and 15M, the second electric wires 19 arranged in the laminating direction on the horizontal press-contact blade 15d.
To make electrical connection.

According to the configuration of the third embodiment, the first electric wire 18 is disposed orthogonally to the first bus bar piece 15 on which the upward press-contact blade 15c is formed, and the first electric wire 18 is connected to the first electric wire 18 in the first direction.
The bus bar piece 15 can be electrically connected to the pressure contact blade 15c of the bus bar piece 15 by pressing.

Therefore, since the busbars are merely arranged by combining the first busbar pieces 15 and the first electric wires 18, it is not necessary to punch out the busbars with a dedicated press die as in the conventional case, and the manufacturing cost is reduced. Along with
By simply combining the first bus bar piece 15 and the first electric wire 18, it is possible to cope with any shape of the bus bar pattern portion, so that the flexibility is remarkably improved.

Further, when the second electric wires 19 are pressed against the laterally pressing blades 15d of the upper and lower first bus bar pieces 15, respectively, the upper and lower first bus bar pieces 15 can be electrically connected. .

Accordingly, the upper and lower first bus bar pieces 15 can be electrically connected only by pressing the second electric wire 19 against the press contact blade 15d, so that the connection can be easily performed and the automation can be easily adapted to automation. Lower costs.

FIG. 8 shows a fourth embodiment, in which a flat plate-shaped first bus bar piece 15 (P to R) is provided with a press-contact blade 15 e oriented in the longitudinal direction.

Then, the first bus bar pieces 15P of the same layer,
In 15Q, the first pressing blade 15e is provided with a first
The electric wires 18 are pressed and electrically connected to each other, and the upper and lower first bus bar pieces 15Q, 15R are connected to the second electric wires 19, respectively.
Is bent into a U-shape and pressed into contact with the respective press-contact blades 15e to be electrically connected.

According to the configuration of the fourth embodiment, the press contact blade 15
Since e is not upward as in the third embodiment, the height (thickness) of the first bus bar piece 15 is reduced by the length of the first bus bar piece 15, so that the electric connection box can be downsized and the first and second layers of the upper and lower layers can be reduced. The 1 busbar pieces 15Q and 15R can be electrically connected only by bending the second electric wire 18 into the U-shape and pressing it against the press contact blade 15e, so that the connection can be easily performed.

[0048]

As is clear from the above description, the first aspect of the present invention relates to the first bus bar piece having the fitting portion formed thereon, and the second bus bar piece having the fitting portion formed in the orthogonal direction. Since the busbars are arranged and electrically connected by fitting the fitted portions of the second busbar pieces to the fitted portions of the first busbar pieces, the busbars are simply arranged by combining the busbar pieces. It is no longer necessary to punch the bus bar with a dedicated press die as in the past, which reduces the manufacturing cost.In addition, by combining bus bar pieces, it can respond to any bus bar pattern shape, so flexibility is remarkable. improves.

Further, the layers of the combination of the first bus bar piece and the second bus bar piece are laminated, and the fitting portion of the third bus bar piece is fitted into the fitting portion of the upper bus bar piece and the lower bus bar piece. (Claim 2)
The upper and lower first bus bar pieces can be electrically connected only by fitting the fitted portion of the third bus bar piece into the fitted portion, so that the connection can be easily performed, the automation can be easily performed, and the cost can be reduced. Become.

Further, if the fitting portion and the fitted portion are formed in a U-shape and the lock hole and the lock projection are formed relatively (claim 3), the fitting portion and the fitted portion can be formed in a similar manner. There is no displacement, and there is no danger that the fitting will come off accidentally.

Furthermore, if the fitting portion is formed in a U-shape and the fitted portion is formed in an I-shape (claim 4), the processing of the second bus bar piece can be easily performed, and the component cost is reduced. Become cheap.

Further, if the entrance width of the fitting portion is set to be smaller than the thickness of the fitting portion (claim 5),
The contact load when the fitting part is fitted into the fitting part is increased, and the connection reliability is improved.

According to a sixth aspect of the present invention, a first electric wire is disposed in a direction orthogonal to a first bus bar piece on which a press contact blade is formed, and the first electric wire is pressed against a press contact blade of the first bus bar piece. Since the bus bars are simply arranged by combining the bus bar pieces and electric wires, there is no need to punch out the bus bar with a dedicated press die as in the past, and the manufacturing cost is low. In addition, simply by combining the bus bar pieces and the electric wires, it is possible to cope with any shape of the bus bar pattern portion, so that the flexibility is remarkably improved.

Further, a press contact blade is formed at right angles to the first bus bar piece, and a layer in combination with the first electric wire pressed against the upward press contact blade is laminated, and the second electric wire is connected to the upper and lower first bus bars. With a configuration in which the first bus bar pieces of the upper layer and the lower layer are electrically connected to each other by simply pressing the second electric wire to the press-contact blade, if the configuration is such that the first bus bar piece is press-contacted to the lateral press-contact blade of the piece (claim 7). Because it can be connected, it can be easily connected, it is easy to adapt to automation, and the cost is lower.

Further, a press-contact blade in the longitudinal direction is formed on the first bus bar piece, a layer of a combination with the first electric wire pressed against the press-contact blade is laminated, and the second electric wire is bent to form an upper layer and a lower layer. With a configuration in which the first bus bar piece is configured to be in pressure contact with and electrically connected to the pressure contact blade in the length direction (claim 8),
Since the height (thickness) of the first bus bar piece is reduced by the length of the press contact blade in the longitudinal direction, the electric connection box can be miniaturized, and the upper and lower first bus bar pieces are connected to the press contact blade by the second electric wire. Can be electrically connected only by bending and press-contacting, so that connection can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bus bar connection structure according to a first embodiment of the present invention.

FIGS. 2A and 2B are cross-sectional views of a bus bar connection structure.

FIG. 3 is a cross-sectional view of a bus bar connection structure of a modified example.

FIG. 4 is a schematic perspective view of a laminated structure of a bus bar.

FIG. 5 is a perspective view of a bus bar connection structure according to a second embodiment.

FIGS. 6A and 6B are cross-sectional views of a bus bar connection structure.

FIG. 7 is a perspective view of a bus bar connection structure according to a third embodiment.

FIG. 8 is a perspective view of a bus bar connection structure according to a fourth embodiment.

FIG. 9 is a perspective view of a conventional bus bar manufacturing process.

[Explanation of symbols]

 15 (A to R) First bus bar piece 15 a Fitting portion 15 b Lock hole 15 c, 15 d, 15 e Pressure contact blade 16 (A to E) Second bus bar piece 16 a Fitting portion 16 b Lock projection 17 (A to C) Third bus bar piece 17a Fitted portion 17b Lock projection 18 First electric wire 19 Second electric wire P1 to P3 Pitch

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nei Saito 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Ltd. 5G361 BA03 BA07 BB01

Claims (8)

[Claims] 1. A connection structure of a bus bar housed in an electric connection box, wherein first bus bar pieces having fitting portions formed at a predetermined pitch are arranged side by side, and fitting portions are formed at a predetermined pitch. The second bus bar pieces are arranged side by side, the second bus bar pieces are arranged in a direction orthogonal to the first bus bar pieces, and the fitted portions of the second bus bar pieces are fitted into the fitting portions of the first bus bar pieces. A bus bar connection structure characterized by being electrically connected. 2. A third bus bar piece having a combination of a first bus bar piece and a second bus bar piece laminated thereon and having a fitting portion formed at a predetermined pitch is provided.
The bus bar pieces are arranged in the laminating direction, and the fitted portions of the third bus bar pieces are fitted into the fitting portions of the upper and lower first bus bar pieces so as to be electrically connected.
The connection structure of the bus bar described in 1. 3. The fitting portion and the fitted portion are formed in a U-shape, and a lock hole is formed on one side surface, and a lock projection for engaging with the lock hole is formed on the other side surface. The bus bar connection structure according to claim 1 or 2, wherein 4. The locking portion is formed in a U-shape, has a locking hole formed in a side surface, and the fitted portion is formed in an I-shape, and has a locking surface which engages with the locking hole on a side surface. The busbar connection structure according to claim 1 or 2, wherein the projection is formed. 5. The busbar connection structure according to claim 4, wherein an entrance width of the fitting portion is set to be smaller than a thickness of the fitted portion. 6. A connection structure of a bus bar housed in an electric connection box, wherein first bus bar pieces having press contact blades formed at a predetermined pitch are arranged side by side, and first electric wires are arranged at a predetermined pitch. And
A busbar connection, wherein the first electric wire is arranged in a direction orthogonal to the first busbar piece, and the first electric wire is pressed against a press-contact blade of the first busbar piece to be electrically connected. Construction. 7. A pressure contact blade is formed on the first bus bar piece at right angles, a layer of a combination with the first electric wire pressed against the upward pressure contact blade is laminated, and the second electric wire is laminated in the laminating direction. 7. The bus bar connection structure according to claim 6, wherein the second electric wire is arranged so as to press the second electric wires against the lateral press-contact blades of the upper and lower first bus bar pieces to be electrically connected. 8. A first bus bar piece is formed with a press-contact blade in a longitudinal direction, a layer of a combination with a first electric wire pressed against the press-contact blade is laminated, and a second electric wire is laminated in a laminating direction. 7. The busbar connection structure according to claim 6, wherein the second electric wire is bent so that the second electric wire is bent and press-contacted to the longitudinally-directed press-contact blades of the upper and lower first busbar pieces to be electrically connected. .