JP2004328959A - Relay box for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the size and the number of components of a relay box having a fusible link, a fuse and a relay, and to optimize the connection of the relay to a power supply side. <P>SOLUTION: In the relay box for an automobile, an input terminal for connecting a battery and a trunk terminal 17 for the relay are projected from the lower end of a substrate. The terminal for connecting the fuse is projected from the upper end. And, a vertical bus bar is integrally provided with a fusible link which has a fine width. The vertical bus bar is built in a case of the relay box in the vertical direction. A bus bar 40 for the relay is housed in the lower part of the case. An input terminal 40b and a terminal 40c for connecting the relay are projected upward from the substrate 40a of the bus bar 40 for the relay. The input terminal 40b of the bus bar 40 is connected to a downward trunk terminal 17 for the relay of the vertical bus bar disposing upward the input terminal 40b of the bus bar 40, and the terminal 40c for connecting the relay is projected to the input side cavity of a relay containing part 24 formed at the upper part of the case. Since the input terminal of the fusible link and the power supply side, the terminal for connecting the fuse connected to the input terminal of the fuse, and the trunk terminal for being connected to the bus bar for the relay are provided integrally with the vertical bus bar. Accordingly, constituting components can be remarkably reduced in number. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an automotive relay box, and more particularly, to a fusible link of a large-capacity fuse and a relay box that accommodates a fuse downstream and mounts a relay, without mounting a fusible link of a separate member. A vertical bus bar is provided in which a link portion, an input terminal portion for battery connection, and an output terminal portion connected to a downstream fuse are provided, and the vertical bus bar is suitably connected to a relay.
[0002]
[Prior art]
Conventionally, Japanese Patent Application Laid-Open No. H10-69849 (Patent Literature 1) has been provided as an electric connection box for housing a fusible link and a fuse of this type. In the electrical junction box, as shown in FIG. 7, a fusible link dedicated block 1 for mounting a plurality of fusible links and a block 2 for mounting a plurality of fuses and relays are separately provided, and a bus bar is provided in each of these blocks. The bus bar is housed and connected to the fusible link and the fuse, and the bus bar connected to the fusible link and the bus bar connected to the fuse are connected by the harness 3.
[0003]
8, the output end of the fusible link 5 of the bus bar 9 housed in the fusible link dedicated block 1 and the fuse 6 of the block 2 are connected by the electric wire w of the harness 3. At the same time, the bus bar 5 of the fusible link dedicated block 1 and the relay 8 of the block 2 are often connected by the electric wire w of the harness 3. As shown in FIG. 9, the connection between the electric wire w and the fuse 6 is such that a crimping bus bar 7 is connected to the electric wire w, and a plurality of fuse connection terminals 7 a are arranged in parallel with the crimping bus bar 7.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 10-69849
[Problems to be solved by the invention]
As described above, since the electric connection box is composed of two blocks and the bus bars housed in these blocks are connected by a harness, the number of components is very large, and the number of assembling steps is increased, resulting in high cost. Problem.
In particular, there is a problem in that the number of parts and the number of working steps increase because the blocks are connected by a harness, and the terminals are crimped to the wire terminals of the harness, respectively.
Furthermore, the fusible link, which is a separate member, is quite large, and the fusible link dedicated block equipped with a plurality of fusible links becomes large, and furthermore, a fuse dedicated block is also required, which requires a large installation space. is there.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problem, and has been divided into two blocks into one to eliminate the connection of a harness, to reduce the size of an electric connection box, and to reduce the number of components. It is another object of the present invention to suitably connect the power supply and the relay.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides an input terminal for battery connection and a relay terminal for relay protruding from a lower end of a substrate extending in a longitudinal direction, and a terminal for fuse connection protruding from an upper end. And a fusible link portion having a narrow portion is integrally formed, and the relay terminal portion for the relay is formed in a shape that is electrically connected to the input terminal portion without passing through the fusible link portion. Set up a bus bar,
The vertical bus bar is vertically assembled in a case of a relay box, and a bus bar for a relay is accommodated in a lower portion of the case, and a board portion of the bus bar for a relay has an input terminal portion and a relay connection terminal portion facing upward. The input terminal portion of the relay bus bar is connected to a relay terminal portion of the vertical bus bar which is located downward, and the relay connection terminal portion is formed on an upper portion of the case. A relay box for an automobile, wherein the relay box protrudes from an input side cavity of the vehicle.
[0008]
According to the above configuration, since the fusible link portion is formed integrally with the vertical bus bar by providing the narrow width portion on the vertical bus bar, it is not necessary to mount a separate fusible link. In addition, an input terminal for battery connection is also integrally provided on the vertical bus bar integrally provided with the fusible link to integrate the input circuit, and an input terminal of a fuse provided downstream of the fusible link. A fuse connection terminal section to be connected is also provided integrally, and further, a relay terminal section to be connected to a relay bus bar connected to a relay is also provided integrally, so that one vertical bus bar can be connected to a fusible link section and an input. Since the terminal portion, the fuse connection terminal portion, and the relay terminal portion are all provided integrally, the number of components can be dramatically reduced.
[0009]
Further, when connecting the vertical bus bar and the relay, conventionally, a crimp terminal is connected to an end of the electric wire, but in the present invention, only the relay bus bar is accommodated from below the case. The input terminal of the relay busbar and the terminal of the relay connection are connected to the relay terminal of the vertical busbar and the input terminal of the relay, and the electrical connection between the vertical busbar and the relay can be easily performed. It is possible to improve the performance and reduce the number of parts.
[0010]
Further, the vertical bus bar is vertically arranged inside the relay box, and the input terminal portion for battery connection and the relay terminal portion for relay are located below, while the terminal portion for fuse connection is located above and on the upper surface of the case. Since the inside of the case is three-dimensionally used as a structure for mounting a fuse, the size of the electric junction box can be reduced, and the occupied space is greatly reduced compared to the case where two conventional blocks are provided. Can be reduced.
[0011]
A fuse bus bar is accommodated in a lower portion of the case, and a fuse load side connection terminal portion is protruded from the fuse bus bar. The fuse load side connection terminal is connected to a fuse output side cavity formed in an upper portion of the case. Projecting.
With this configuration, the output terminal of the fuse and the bus bar for the fuse are connected only by housing the bus bar for the fuse from below the case, so that the circuit on the fuse load side can be easily formed.
[0012]
The vertical bus bar is resin-molded except for the narrow portion of the fusible link portion, the input terminal portion for battery connection, the relay terminal portion for relay and the terminal portion for fuse connection, and provides a bus bar molded member. The busbar mold member is incorporated in the case above the relay busbar in the case.
[0013]
As described above, by molding the vertical bus bar with the resin, the strength can be increased so that the vertical bus bar is not deformed. In particular, the fuse connection terminal connected to the input terminal of the fuse is projected and held in the integrally formed fuse input terminal cavity, so that a flexible lance or the like that locks the fuse connection terminal is locked. Since there is no need to provide a stop, the configuration can be simplified, and the positioning accuracy can be improved while protecting the fuse connection terminal.
[0014]
The relay terminal portion for the relay provided on the vertical bus bar has a downward tab shape, while the input terminal portion of the relay bus bar has a press-contact tab formed by cutting a press-contact slot from the tip, and the above-described vertical bus bar is incorporated into the case. When the downward tab is press-fitted into the press-contact slot of the press-contact tab and is press-connected, the electrical connection can be made only by inserting the relay bus bar from under the case, and the relay terminal can be eliminated.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In a case 11 of the electric connection box 10 shown in FIG. 1, a busbar molding member 18 obtained by resin-molding the vertical busbar 12 is vertically incorporated, and a battery and an alternator connection electric wire are connected to an input terminal of the vertical busbar 12 at a lower portion of the case 11. In addition to the connection, the fuse 20 and the relays 27 and 29 are mounted on the upper surface of the case 11, and the circuit connection is achieved by the vertical bus bar 12, the relay bus bar 40, and the like.
[0016]
The vertical bus bar 12 has a shape shown in FIG. 2 and is formed by punching a conductive metal plate. The vertical bus bar 12 has a tab-shaped input terminal 13 for connecting the first battery, a tab-shaped input terminal 14 for connecting the alternator, and a relay terminal 17 for relay protruding from the lower end of the board portion 12a extending in the longitudinal direction. Has been established. A fusible link portion 15 having a narrow portion 15a serving as a fusing portion protrudes in parallel from the lower end of the substrate portion 12a between these input terminals 13 and 14, and the substrate portion 12a is sandwiched between the narrow portions 15a. The distal end of the fusible link 15 that connects to the terminal is a tab 15b. A plurality of fuse connection terminals 16 protruding from the upper end of the substrate portion 12a to be connected to the fuse input terminals. These fuse connection terminals 16 are pressure contact terminals formed by cutting slots 16a from the upper end.
[0017]
As shown in FIGS. 3A and 3B, the vertical bus bar 12 is resin-molded to provide a bus bar molded member 18. The busbar mold member 18 exposes the narrow portions 15a of the fusible link portion 15 and also exposes the input terminals 13, 14 and the relay terminal portion 17. In addition, a fuse input terminal cavity 19 for accommodating the input terminal 20a of the fuse 20 is provided in parallel and integrally provided, and the fuse connection terminal 16 is projected from the cavity 19. The cavity portion 19 forms a half portion of the fuse accommodating portion.
[0018]
The busbar mold member 18 is vertically detachably inserted into the case 11 of the relay box 10 along the inner surface of the left side 11a of the case 11 in FIG. That is, a locking portion (not shown) is provided on the outer surface of the bus bar mold member 18, and the locking portion is locked to a locked portion (not shown) formed on the inner surface of the case 11.
[0019]
In the case 11, a cavity 21 for a fuse output terminal for accommodating the output terminal 20 b of the fuse 20 is provided side by side on the upper surface along the insertion hole of the bus bar mold member 18. When the bus bar mold member 18 is incorporated into the case 11, the cavity portion 21 is arranged in parallel with the cavity portion 19 of the bus bar mold member 18, and the fuse portion 22 is formed by matching the cavity portion 19 and the cavity portion 21. Further, on the upper surface of the case 11, relay accommodating portions 23 and 24 are also formed.
[0020]
In the relay box 10 in which the bus bar molded member 18 in which the vertical bus bar 12 is molded is incorporated in the case 11, the female terminal 25 connected to the terminal of the power supply line w1 is fitted to the input terminal portion 13 for battery connection projecting downward. At the same time, the female terminal 26 connected to the terminal of the electric wire w2 is fitted and connected to the input terminal 14 for alternator connection. Further, female terminals connected to the electric wires are fitted and connected to the tabs 15b of the fusible link portion 15, respectively.
[0021]
As shown in FIG. 4, the relay bus bar 40 is formed by bending a conductive metal plate punched into a required shape, and press-contact slots 40b-1 and 40c-1 are formed from the upper end of the strip-shaped substrate portion 40a. The input terminal portion 40b and the relay connection terminal portion 40c are protruded.
Then, by inserting the relay bus bar 40 into the case 11 from the lower portion of the case 11, the press-contact slot 40 b-1 of the input terminal portion 40 b is press-fitted into the relay terminal portion 17 of the vertical bus bar 12 and the relay housing portion 24 is inserted. The relay connection terminal portion 40c is inserted into the input side cavity (not shown), and the input terminal 29a of the relay 29 is press-fitted into the press-contact slot 40c-1 of the relay connection terminal portion 40c.
The relay bus bar 40 may be provided with a terminal portion other than the input terminal portion 40b and the relay connection terminal portion 40c and connected to a fuse or the like.
[0022]
As described above, the cavity portion 19 exposed on the upper surface of the case 11 constitutes a fuse accommodating portion 22 provided in parallel with the cavity portion 21 of the case 11 to mount a plurality of fuses 20 in a parallel state. Is mounted with a fuse 20.
As shown in FIGS. 1B and 5, the input terminal 20 a of the fuse 20 is inserted into the cavity 19, and is connected by pressure to the pressure-contact slot 16 a of the fuse connection terminal portion 16 of the vertical bus bar 12.
[0023]
The fuse bus bar 41 is formed by bending a conductive metal plate punched into a required shape, and has a fuse load side connection terminal portion having pressure contact slots 41b-1 and 41c-1 from an upper end of a strip-shaped substrate portion 41a. 41b and a relay connection terminal portion 41c are protruded.
Then, by inserting the bus bar 41 for the fuse from below the case 11, the press contact slot 41b-1 of the connection terminal portion 41b of the fuse load side 41b of the bus bar 41 for the fuse is pressed into the output terminal 20b of the fuse 20, and the relay housing is inserted. The relay connection terminal portion 41c is inserted into the input side cavity (not shown) of the portion 23, and the input terminal 27a of the relay 27 is pressed into the press contact slot 41c-1 of the relay connection terminal portion 41c.
[0024]
As shown in FIG. 6, the circuit in the relay box 10 distributes the power supplied from the input terminal unit 13 of the vertical bus bar 12 to the fusible link unit 15 by the board unit 12a, and a part of the fusible link unit 15. Connect the output side tab 15b directly to the electric wire.
The fuse connection terminal 16 protruding from the upper end of the board portion 12a is connected to the input terminal 20a of the fuse 20, and the battery → the input terminal portion 13 → the board portion 12a → the fusible link portion 15 → the board portion 12a → the fuse connection terminal. The circuit is formed with the part 16 → the input terminal 20a of the fuse 20. Further, downstream of the fuse 20, the fuse bus bar 41 connects to the relay 29.
[0025]
The power supplied from the input terminal unit 13 of the vertical bus bar 12 is directly connected to the relay 29 via the relay bus bar 40, and a circuit flowing from the battery → the input terminal unit 13 → the relay bus bar 40 → the relay 29 is also provided. It is formed.
[0026]
In the relay box 10 having the above configuration, since the fusible link portion 15 is formed integrally with the vertical bus bar 12, there is no need to mount a separate fusible link. Further, since the fuse connection terminal portion 16 is also formed integrally with the vertical bus bar 12, the harness 3 and the crimp bus bar 7 shown in FIGS. 7 to 9 can be absorbed by the vertical bus bar 12, and the power supply side by the vertical bus bar 12. And the fuse can be connected to the fuse via a fusible link.
In addition, simply by housing the relay bus bar 40 from below the case 11, the input terminal 40b of the relay bus bar 40 is connected to the relay terminal 17 of the vertical bus bar 12, and the relay connection terminal 40c is connected to the relay. Connected to the input terminal, electrical connection between the vertical bus bar 12 and the relay 29 can be easily performed, so that workability can be improved and the number of parts can be reduced.
[0027]
Further, a bus bar molding member 18 in which the vertical bus bar 12 is molded is vertically assembled in the case 11, and an input terminal portion 13 and a fusible link portion 15 serving as a power supply side connection portion are provided at a lower portion, and a fuse input terminal portion is provided at an upper portion. Since the cavity portion 19 is provided, the inside of the case 11 can be three-dimensionally used, and the size of the relay box 10 can be reduced.
Further, since the fuse accommodating portion 22 is provided with the cavity portion 19 on the input side in the bus bar mold member 18 and the cavity portion 21 on the output side is provided in the case 11 and is of a split type, the fusible link portion 15 is blown and cut vertically. When the bus bar 12 needs to be replaced, it is not necessary to remove the fuse bus bar 41 connected to the output terminal 20b of the fuse 20, and the workability can be improved.
[0028]
【The invention's effect】
As is apparent from the above description, according to the present invention, the fusible link and the input terminal on the power supply side, the fuse connection terminal connected to the input terminal of the fuse, and the relay terminal portion for connecting to the relay bus bar are vertically arranged. Since it is provided integrally with the bus bar, the number of components can be extremely reduced. Alternatively, electrical connection between the vertical bus bar and the relay can be easily performed simply by housing the relay bus bar from below the case, thereby improving workability and reducing the number of parts. In addition, there is no need to provide a block dedicated to the fusible link and a block dedicated to the fuse, and they can be combined into one case, so that the size can be reduced. Furthermore, since the busbar molded member in which the vertical busbar is resin-molded is vertically incorporated into the case and connected to the connecting parts in a three-dimensional manner, various advantages such as a further reduction in the size of the unitized case can be achieved. Having.
[Brief description of the drawings]
FIG. 1 shows a relay box according to an embodiment of the present invention, wherein (A) is a plan view and (B) is a sectional view.
FIG. 2 is a front view of a vertical bus bar.
FIGS. 3A and 3B show a bus bar molded member obtained by molding a vertical bus bar, wherein FIG. 3A is a plan view and FIG. 3B is a front view.
FIG. 4 is a perspective view showing a connection form of a relay bus bar.
FIG. 5 is a perspective view showing a connection mode of a fuse bus bar.
FIG. 6 is a circuit diagram using a vertical bus bar and a relay bus bar.
FIG. 7 is a perspective view showing a conventional example.
FIG. 8 is a conventional circuit diagram.
FIG. 9 is a view showing a crimping bus bar conventionally used.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Relay box 11 Case 12 Vertical bus bar 13 Input terminal part for battery connection 14 Input terminal part for alternator connection 15 Fusible link part 16 Terminal part for fuse connection 17 Relay terminal part 19 Cavity part 20 for fuse input terminal 20 Fuse 21 Cavities 23, 24 for fuse output terminals Relay housings 27, 29 Relay

Claims (4)

An input terminal portion for battery connection and a relay terminal portion for relay protrude from the lower end of the substrate portion extending in the longitudinal direction, and a terminal portion for fuse connection protrudes from the upper end, and a narrow portion is provided. The fusible link portion is formed integrally, and the relay terminal portion for the relay is provided with a vertical bus bar shaped to be electrically connected to the input terminal portion without passing through the fusible link portion,
The vertical bus bar is vertically assembled in a case of a relay box, and a bus bar for a relay is accommodated in a lower portion of the case, and a board portion of the bus bar for a relay has an input terminal portion and a relay connection terminal portion facing upward. The input terminal portion of the relay bus bar is connected to a relay terminal portion of the vertical bus bar which is located downward, and the relay connection terminal portion is formed on an upper portion of the case. A relay box for an automobile, wherein the relay box protrudes from an input side cavity of a section. A fuse bus bar is accommodated in a lower portion of the case, and a fuse load side connection terminal portion protrudes from the fuse bus bar, and the fuse load side connection terminal portion is a fuse output side cavity formed in an upper portion of the case. 2. The automotive relay box according to claim 1, wherein the relay box protrudes from the vehicle. The vertical bus bar is resin-molded except for the narrow portion of the fusible link portion, the input terminal portion for battery connection, the relay terminal portion for relay and the terminal portion for fuse connection, and provides a bus bar molded member. 3. The automotive relay box according to claim 1, wherein the busbar mold member is incorporated in the case above the relay busbar in the case. The relay terminal portion for the relay provided on the vertical bus bar has a downward tab shape, while the input terminal portion of the relay bus bar has a press-contact tab formed by cutting a press-contact slot from the tip. The automotive relay box according to any one of claims 1 to 3, wherein the downward tab is press-fitted into the press-contact slot of the press-contact tab and connected by press-contact.

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