JP2003037918A - Bus bar with fuse division, formation method of bus bar and relay box for automobile with bus bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to easily correspond with a change in fuse part integratedly established in a bus bar and to easily confirm a capacity of a fuse part. SOLUTION: A narrow width fuse part 13c which is formed integratedly in a bus bar 13 changes its width or/and length corresponding to the capacity, the bus bar 13 is shared with different type cars, the part except for the fuse part 13c is made to be an identical shape, and the position of the fuse part 13c is made to be fixed. The capacity of these fuse parts 13c is changed by the width of the narrow width part or/and the length in S figuration, a print part N engraved the capacity is formed in the vicinity of the fuse part 13c, a nest which punches in the shape corresponding to the required fuse capacity is installed in a replaceable manner to the position which corresponds to the fuse part 13c of a punching metal mold which forms the bus bar 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus bar provided with a fuse portion to be mounted in an automobile relay box, a method for forming the bus bar, and an automobile relay box provided with the bus bar, and more particularly to a fuse capacity. The fuse portion can be provided.

[0002]

2. Description of the Related Art Conventionally, an automobile relay box connected to a battery mounted on an automobile has a structure shown in FIG. 7A, and a fusible link mounting portion 2 and a relay mounting portion 3 are arranged from the upper surface of a case 1. A fuse mounting portion 4 is provided, and fusible links (high current fuses), relays, and fuses are fitted and mounted on the mounting portions 2 to 4, respectively. The fusible link, the relay, and the fuse are connected via an electric wire. Further, the terminals on the output side of the relay and the fuse are connected by inserting and locking the terminals of the electric wire terminals in a terminal accommodating portion (not shown) provided on the bottom surface side of the case 1. Further, as shown in FIG. 7B, a bolting terminal 7A is connected to the end of the power supply line w1, and the bus bar 6 in the case is coupled with a bolt 8 for electrical connection.

In the automotive relay box having the above structure,
The fusible link of a large-capacity fuse is attached by a plug-in, and since the fusible link generates a large amount of heat, the relay and the fuse are attached at positions away from each other, which causes an increase in the size of the automobile relay box. There is.

To solve the above-mentioned problem, as shown in FIG. 8, a flat bus bar 6'fixed on an insulating plate 9 is provided with a fuse portion 6a 'consisting of a narrow width portion, thereby eliminating the fuse attachment. It has been proposed to reduce the space and the number of parts.

[0005]

When the above configuration is adopted,
When the bus bar 6'is formed by punching out a conductive metal plate with a punching die, the shape of the bus bar 6'cannot be changed, and therefore the capacity of the fuse portion 6a 'cannot be changed, and even if the specification is slightly changed. It is necessary to newly start the work from the mold and re-form the bus bar. Further, since the fuse portion 6a 'is provided integrally only by making a part of the bus bar 6'narrow, the capacity of the fuse portion 6a' cannot be easily confirmed.

The present invention has been made in view of the above problems, and makes it possible to easily cope with a change in the capacity of a fuse portion integrally provided on a flatly placed bus bar, and to easily confirm the capacity of the fuse portion. The challenge is to be able to do so.

[0007]

In order to solve the above-mentioned problems, the present invention provides a single bus bar formed by punching out a conductive metal plate with a plurality of fuse parts partially narrowed. , The bus bar is shared by different vehicle models, the parts other than the fuse part have the same shape, and the position of the fuse part is fixed, and the fuse capacity of these fuse parts corresponds to the car model. Width or /
And a bus bar provided with a fuse portion, characterized in that the length of the S-shape is changed.

With the above arrangement, the narrow width portion provided integrally with the bus bar is used as the fuse portion, so that a fuse as a separate component can be eliminated and at the same time the width and / or the length of the fuse portion can be reduced. By changing it, it becomes possible to adjust the critical current value at which the fuse part is blown,
Fuse parts having various capacities can be formed.

In addition, the width of the narrow portion is changed or / and the narrow portion is S between the vehicle models having different fuse portions.
By changing the shape and the length, the capacity of the fuse portion can be changed without affecting the shape of other bus bars, and the bus bar can be shared.

It is preferable that the bus bar is provided with a marking for indicating the fuse capacity or a required number of protrusions or holes near the fuse portion.

As described above, in the vicinity of the fuse portion,
Marks such as markings, protrusions or holes that can identify the capacity of the fuse part so that the capacity of each fuse part can be checked at a glance, so that the assembly position is incorrect when the bus bar is assembled to the case. Can be assembled without

Also, according to the present invention, a bus bar formed by punching a conductive metal plate is replaceably attached to the fuse portion forming portion of the punching die, the nest being punched into a shape corresponding to the fuse capacity. A forming method is provided.

According to the above forming method, when the capacity of the fuse portion of the bus bar is changed due to a change in specifications,
It is possible to form a bus bar with a different fuse part by simply replacing the above-mentioned insert corresponding to the fuse part whose capacity is to be changed with a different capacity, without having to re-engineer the punching mold. The versatility of the product can be increased and the cost can be reduced. It should be noted that by providing the markings, the marks of the protrusions, or the holes in the area where the nest is inserted, the markings can be changed by the nest for changing the fuse capacity.

Furthermore, the present invention is a relay box for an automobile, which accommodates the above-mentioned bus bar, comprising a box body and a lower case, the box body having relay mounting portions projecting from the inner surface of the peripheral wall. The bottom surface corresponding to the peripheral clearance is a void, the bottom wall of the lower case assembled to the lower part of the block is shaped to fit in the void of the box body, and the bus bar made of a single plate is fixed to the upper surface of the bottom wall. We provide a relay box for automobiles.

In the relay box configured as described above, the busbars are arranged by utilizing the gap which becomes a dead space between the relay mounting portions, so that the electrical junction box can be downsized and the density can be increased. At the same time, the fusible link as a separate component has been conventionally mounted, but since it is formed in the middle of the bus bar, the fusible link as a separate component can be eliminated.

Further, since the lower case to which the bus bar made of one plate is fixed is arranged in the space of the box body, the engraved mark or a required number of protrusions or holes provided in the vicinity of the fuse portion of the bus bar is provided in the relay box. Since it can be seen from the outside through the gap, the capacitance of the fuse portion can be confirmed even after assembly.

The box body may be provided with a fuse mounting portion, and a fuse for a plug-in may be additionally used, and a tab for fuse connection may be provided on the bus bar in a bent manner to connect to the fuse. In addition, a connector housing is also provided,
You may fit the connector connected to the terminal of an electric wire group, and connect the tab formed in the said bus bar to this connector.

[0018]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment.

As shown in the exploded perspective view of FIG. 1, the automobile relay box 10 includes a box body 11 and a lower case 1.
2, the bus bar 13 is provided.

The box body 11 has a rectangular peripheral wall 11a.
A relay mounting portion 15 and a fuse mounting portion 16 are provided so as to project from the inner surface of the. Relay mounting part 15 and fuse mounting part 1
A gap 20 is provided between the six. Furthermore, the peripheral wall 11a
Wall 21 protruding from the lower case 12 along the inner surface of the
A cylindrical portion 18 is provided for inserting.

The bottom wall 12a of the lower case 12 assembled to the lower portion of the box body 11 is shaped to fit into the gap 20 of the box body 11. The bus bar 13, which is caulked and fixed to the upper surface of the bottom wall 12a, is made of a single plate obtained by punching out a conductive metal plate in a shape corresponding to the shape of the bottom wall 12a, and is arranged on substantially the entire surface of the bottom wall 12a. .

The bus bar 13 is formed by punching a conductive metal material into the shape shown in FIG. 3 and then bending it into the shape shown in FIG. 1. The punching die for forming the bus bar 13 is An insert for punching into a shape corresponding to the fuse capacity (40 amperes in the drawing) is replaceably attached to the portion forming the region A in FIG. 3 including the fuse 13c. The flat placing portion 13a of the bus bar 13 has a shape that conforms to the shape of the bottom wall 12a, and is arranged along the gap 20 which is a dead space between the relay mounting portion 15, the fuse mounting portion 16 and the like when assembled to the box body 11. is doing.

In the flat placing portion 13a, an S-shaped narrow width fuse portion 13c is formed between the wide width portions 13b, and the capacitance of the fuse portion 13c is provided near the fuse portion 13c. A printing unit N is provided on which the indicated value is marked. The width and length of the fuse portion 13c are changed according to the capacity, and the printing portion N is also stamped with a value indicating the capacity (40, 50, 100 amperes in this embodiment). Further, since the printing portion N is provided in the range in which the nest is inserted, the printing value can be changed by the same nest in which the fuse capacity is changed.

Further, a tab 13d for relay connection is formed by bending upward at the tip of the flat placing portion 13a, and
A tab 13e for fuse connection is bent and formed in parallel on one side of the bus bar 13. Also, the flat holder 13
A tab 13f for connecting the power supply line and a tab 13g for connecting the electric wire to the alternator are formed on one end edge of a and bent downward.

Tab 13 for connecting the relay and the fuse
d and 13e are pressure contact slots 13d-1 and 13e from the tip.
-1 cut, relay mounting part 15, fuse mounting part 1
The relay and the fuse mounted on 6 are directly connected to the input side terminal without the relay terminal.

Further, the tab 13f for connecting the power source line and the tab 13g for connecting the alternator are projected into the terminal accommodating chamber of the wire connecting portion 12c projecting from the bottom wall of the lower case 12, and the tab 13f is connected to the end of the power source line w1. Connected female terminal T
1, and the tab 13g is fitted and connected to the female terminal T2 connected to the end of the electric wire w2 to the alternator. The tabs 13f and 13g may be connected to the terminal of the wire end via a connector.

In the relay box having the above-mentioned structure, the lower case 12 in which the bus bar 13 is fixed to the upper surface of the bottom wall 12a.
Is attached to the lower part of the box main body 11, and the protective wall 21 is inserted into the tubular portion 18 and is locked and coupled in a state where it is positioned and held, thereby forming the configuration shown in FIG.

Lower case 12 to the box body 11
With the assembly, the bus bar 13 is arranged along the dead space between the relay mounting portion 15 and the fuse mounting portion 16 provided in the box body 11, and the relay tab 13d is formed by being bent from the bus bar 13. Is inserted into the terminal accommodating portion of the relay mounting portion 15, and the fuse tab 13e is inserted into the terminal accommodating portion of the fuse mounting portion 16.

The relay mounting portion 15 and the fuse mounting portion 1
When a relay and a fuse are mounted on 6 and these terminals are inserted through the terminal holes opened on the upper surface of the mounting portion, the input side terminals are directly connected to the tabs 13d and 13e of the bus bar 13. The output terminals of the relay and fuse are the relay mounting part 1
5. Connected to the terminal of the electric wire terminal to be inserted and locked in the electric wire connecting portion formed under the fuse mounting portion 16. Thus, after mounting the relay and the fuse, the upper case (not shown) is covered on the upper surface of the box body 11.

With the above structure, the width of the fuse portion 13c formed of a narrow portion integrally formed on the bus bar 13 or /
By changing the length and the length, it becomes possible to adjust the critical current value at which the fuse portion 13c is blown, and it is possible to form fuse portions having various capacities.

Further, a printing unit N capable of identifying its capacity is provided in the vicinity of the fuse unit 13c and each fuse unit 13 is provided.
Since the capacity of c can be confirmed at a glance, when the bus bar 13 is assembled to the lower case 12, the assembly position can be assembled without making a mistake. Also,
Since the lower case 12 to which the bus bar 13 is fixed is arranged in the void 20 of the box body 11, the printed portion N provided near the fuse portion 13c of the bus bar 13 can be visually recognized from the outside of the relay box through the void 20.
The capacity of the fuse portion 13c can be confirmed even after assembly.

Further, by using a portion corresponding to the fuse portion 13c of the punching die as a nest, when the capacity of the fuse portion 13c is changed due to a specification change or the like, the nest is replaced with a different capacity. A bus bar having a different fuse portion can be formed simply by replacing the die, and the versatility of the punching die can be improved and the cost can be reduced.

Further, the fuse portion 13c, which is a narrow portion, is S
With the shape, the length of the fuse portion 13c without affecting the shape of other portions of the bus bar 13, that is,
The capacity can be changed, and the bus bar 13 can be shared.

In the relay box 10, the bus bar 13 is arranged by utilizing the gap which becomes a dead space between the relay mounting portion 15, the fuse mounting portion 16 and the like, so that the size and the density can be reduced. .

Although the above embodiment is applied to the relay box for automobiles, the present invention is not limited to the relay box for automobiles, and can be applied to other electric junction boxes. Further, in the above embodiment, only the region A corresponding to one fuse portion 13c of the punching die is nested.
The regions corresponding to all the fuse portions 13c may be nested, that is, the punching die portions corresponding to the regions where the specifications are likely to be changed may have a nested structure.

FIG. 5 shows a bus bar 13 'of the second embodiment. As shown in FIG. 5, the bus bar 13 'is formed by punching a conductive metal material into a shape substantially similar to that of the first embodiment, and the flat placing portion 13a' has an S-shape between the wide portions 13b '. The thin fuse portion 13c 'formed in the above is formed. Further, in this embodiment, three protrusions P representing the capacitance of the fuse portion 13c 'are provided near the fuse portion 13c'. (In the present embodiment, the three projections mean 40 amperes.) Since the other configurations are the same as those in the first embodiment, description thereof will be omitted.

FIG. 6 shows a bus bar 13 "of the third embodiment. The bus bar 13" is formed by punching a conductive metal material into a shape similar to that of the first embodiment as shown in FIG. In the placing portion 13a ″, an S-shaped narrow fuse portion 13c ″ is formed between the wide portion 13b ″. Further, in the present embodiment, the fuse portion 13c ″ is provided near the fuse portion 13c ″. Three holes H representing the capacity of 13c ″ are provided. (In this embodiment, the three holes mean 40 amperes.) Since the other configurations are similar to those of the first embodiment, description will be made. Is omitted.

[0038]

As is apparent from the above description, according to the present invention, the fuse portion formed of the narrow width portion provided on the bus bar has a critical current value which is blown by changing the width and / or the length. Can be adjusted, and fuse parts of various capacities can be formed. Further, by changing the length of the narrow portion to have an S shape, the shape of other portions of the bus bar is not affected, and the bus bar can be shared between different vehicle types.

By providing a stamp or a required number of protrusions or holes for identifying the capacity in the vicinity of the fuse portion, the capacity of each fuse can be checked at a glance and the bus bar assembly position can be set correctly. Since the lower case to which the bus bar is fixed is arranged in the space of the box body, the markings and the like can be visually recognized from the outside of the relay box through the space, and the capacity of the fuse portion can be confirmed even after assembly.

Further, by using a portion corresponding to the fuse portion of the punching die as a nest, when the capacity of the fuse portion is changed due to a specification change or the like, the fuse portion can be changed by simply replacing the nest. The bus bar can be formed, the versatility of the punching die is increased, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a vehicle relay box according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state where the bus bar is fixed to the lower case.

FIG. 3 is a development view of a bus bar.

FIG. 4 is a partial plan view of an automobile relay box.

FIG. 5 is a development view of a bus bar of the second embodiment.

FIG. 6 is a development view of a bus bar according to a third embodiment.

FIG. 7 shows a conventional automotive relay box,
(A) is a plan view and (B) is a side view.

FIG. 8 is a perspective view showing a conventional bus bar and an insulating plate.

[Explanation of symbols]

10 Automotive relay box 11 box body 12 lower case 12a bottom wall 13 Bus bar 13a Flat placing part 13b wide part 13c fuse part 13d relay connection tab 13e Fuse connection tab 13f Power connection tab 13g Alternator connection tab 15 Relay mounting part 16 Fuse mounting part 20 gaps H hole N printing section P protrusion

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01R 24/08 H01R 23/02 K (72) Inventor Yasuhisa Tanaka 1-14 Nishisuehiro-cho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd. F-term (reference) 5E021 FA05 FA14 FB20 FC27 FC29 LA11 LA15 5E023 BB12 EE03 GG06 HH12 HH17 HH20 5G361 BA03 BB03 BC01

Claims (4)

[Claims] 1. A busbar formed by punching out a conductive metal plate is provided with a plurality of fuse parts partially narrowed, and the busbar is shared by different vehicle models, and the fuse part is excluded. The parts have the same shape, the positions of the fuse parts are fixed, and the fuse capacities of these fuse parts are changed according to the vehicle type, and the width of the narrow part and / or the length of the S shape is changed. A bus bar provided with a fuse portion characterized by the above. 2. The bus bar provided with a fuse portion according to claim 1, wherein the bus bar is provided with a marking for indicating a fuse capacity or a required number of protrusions or holes near the fuse portion. 3. The bus bar according to claim 1 or 2, wherein an insert for punching into a shape corresponding to a fuse capacity is replaceably attached to the fuse portion forming portion of a punching die, and a conductive metal plate is provided. A method for forming a bus bar formed by punching. 4. A relay box for an automobile, comprising the bus bar according to claim 1 or 2, comprising a box body and a lower case, wherein the box body has a relay mounting portion projecting from an inner surface of a peripheral wall. The bottom surface corresponding to the clearance around the mounting portion is a void, the bottom wall of the lower case assembled to the lower part of the block is shaped to fit in the void of the box body, and the bus bar is made of a single plate on the upper surface of the bottom wall. A relay box for automobiles, characterized in that it is fixed.