JP4096800B2 - Automotive relay box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automobile relay box, and more particularly, in a fusible link of a large-capacity fuse and a relay box in which a fuse is accommodated downstream thereof and a relay is mounted, without mounting a fusible link of a separate member. A vertical bus bar in which a link part, an input terminal part for battery connection and an output terminal part connected to a downstream fuse are integrated is provided, and the vertical bus bar and the relay are suitably connected.
[0002]
[Prior art]
Conventionally, as an electrical connection box that accommodates this type of fusible link and fuse, Japanese Patent Laid-Open No. 10-69849 (Patent Document 1) has been provided. In the electrical junction box, as shown in FIG. 7, a fusible link dedicated block 1 for attaching a plurality of fusible links and a block 2 for attaching a plurality of fuses and relays are separately provided, and a bus bar is provided in each of these blocks. The bus bar is accommodated and connected to a fusible link and a fuse, and the bus bar connected to the fusible link and the bus bar connected to the fuse are connected by a harness 3.
[0003]
8, the output end of the fusible link 5 of the bus bar 9 accommodated 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. In addition, 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 electric wire w and the fuse 6 are connected by connecting a crimping bus bar 7 to the electric wire w, and arranging a plurality of fuse connection terminals 7 a on the crimping bus bar 7.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-69849
[Problems to be solved by the invention]
As mentioned above, the electrical junction box is composed of two blocks, and the bus bars housed in these blocks are connected by harnesses, so the number of components is very large and the number of assembly steps is increased, resulting in high costs. There is a problem to become.
In particular, there is a problem in that the number of parts and work man-hours increase in that the blocks are connected by a harness and the terminals are crimped to the wire terminals of the harness, respectively.
Furthermore, the fusible link as a separate member is quite large, and the dedicated block for the fusible link on which multiple fusible links are mounted increases in size and requires a dedicated fuse block, which requires a large installation space. is there.
[0006]
The present invention has been made in view of the above-described problems, and the one that has been divided into two blocks is used as one to eliminate the connection of the harness, thereby reducing the size of the electrical connection box and reducing the number of components. In addition, it is an object to suitably connect the power supply side and the relay.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention projects a battery connection input terminal portion and a relay relay terminal portion from the lower end of a substrate portion extending in the longitudinal direction, and projects a fuse connection terminal portion from the upper end. And a fusible link portion having a narrow width portion is integrally formed, and the relay terminal portion for the relay is vertically connected to the input terminal portion without passing through the fusible link portion. The bus bar is resin-molded except for the narrow part of the fusible link part, the input terminal part for battery connection, the relay terminal part for relay and the terminal part for fuse connection, to provide a bus bar mold member ,
The bus bar mold member is integrally provided with a cavity portion for a fuse input terminal in which a fuse input terminal is accommodated in parallel, and the fuse connection terminal portion protrudes into the cavity portion. Provided in parallel with the cavity for the fuse output terminal in which the fuse output terminal is accommodated in the case of the relay box to be incorporated,
The bus bar mold member is assembled vertically in the case of the relay box, and the fuse input terminal cavity provided in the bus bar mold member and the fuse output terminal cavity provided in the case are arranged in parallel. A housing portion is formed, and a relay bus bar is housed in the lower portion of the case. An input terminal portion and a relay connection terminal portion project upward from the board portion of the relay bus bar, and the relay bus bar The input terminal portion of the vertical bus bar is connected to the relay terminal portion for the downward relay of the vertical bus bar, and the relay connection terminal portion protrudes into the input side cavity of the relay accommodating portion formed on the upper portion of the case. An automotive relay box is provided.
[0008]
With 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 fusible link as a separate member. In addition, a vertical bus bar integrally provided with this fusible link is also provided with an input terminal part for battery connection so as to integrate an input circuit, and an input terminal of a fuse provided downstream of the fusible link part. The fuse connection terminal part to be connected is also provided integrally, and further, the relay terminal part to be connected to the relay bus bar to be connected to the relay is also provided integrally, so one vertical bus bar is connected to the fusible link part, input Since the terminal portion, the fuse connecting terminal portion, and the relay terminal portion are all provided integrally, the number of components can be drastically reduced.
[0009]
Further, when connecting the vertical bus bar and the relay, conventionally, a crimp terminal is connected to the end of the electric wire. However, in the present invention, the relay bus bar is only accommodated from below the case. The relay bus bar input terminal part and relay connection terminal part are connected to the vertical bus bar relay terminal part and the relay input terminal, so that the electrical connection between the vertical bus bar 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 arranged vertically inside the relay box, and the battery connection input terminal part and the relay relay terminal part are located below, while the fuse connection terminal part is located above the case upper surface. Since the inside of the case is used three-dimensionally as a structure that can be equipped with a fuse, it is possible to reduce the size of the electrical junction box and occupy much more space than when two conventional blocks are provided. Can be reduced.
[0011]
A fuse bus bar is accommodated in the lower portion of the case, and a fuse load side connection terminal portion is projected from the fuse bus bar, and the fuse load side connection terminal is connected to a fuse output side cavity formed in the upper portion of the case. It is protruding.
With the above configuration, the fuse output terminal and the fuse bus bar are connected only by housing the fuse bus bar from below the case, and the circuit on the fuse load side can be easily formed.
[0012]
The vertical bus bar is provided with a bus bar mold member by resin molding except 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, The bus bar mold member is incorporated in the upper part of the relay bus bar in the case.
[0013]
Thus, the strength can be increased by resin molding the vertical bus bar so that the vertical bus bar is not deformed. In particular, the fuse connection terminal to be connected to the fuse input terminal is projected and held in the integrally formed fuse input terminal cavity so that a flexible lance or the like for locking the fuse connection terminal can be used. There is no need to provide a stop, the configuration can be simplified, and positioning accuracy can be improved while protecting the fuse connection terminal.
[0014]
The relay relay terminal portion provided on the vertical bus bar has a downward tab shape, while the input terminal portion of the relay bus bar is a pressure contact tab obtained by cutting a pressure contact slot from the tip, and when the vertical bus bar is incorporated in the case, When the downward tab is press-fitted into the press-contact slot of the press-connect tab and is press-connected, electrical connection can be achieved by simply inserting the relay bus bar from below the case, and a relay terminal can be dispensed with.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the case 11 of the electrical connection box 10 shown in FIG. 1, a bus bar mold member 18 in which the vertical bus bar 12 is resin-molded is vertically installed, and the battery and the alternator connection wires are connected to the input terminals of the vertical bus bar 12 at the lower part 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 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 the shape shown in FIG. 2 and is formed by punching a conductive metal plate. The vertical bus bar 12 projects a tab-shaped input terminal 13 for connecting a first battery, a tab-shaped input terminal 14 for connecting an alternator, and a relay terminal 17 for a relay from the lower end of a substrate portion 12a extending in the longitudinal direction. Has been established. A fusible link portion 15 provided with a narrow width portion 15a serving as a fusing portion from the lower end of the substrate portion 12a between the input terminals 13 and 14 is provided in a juxtaposed state, and the substrate portion 12a is sandwiched between the narrow width portions 15a. The tip portion of the fusible link portion 15 connected to is a tab 15b. A plurality of fuse connection terminals 16 connected to the fuse input terminals are projected from the upper end of the substrate portion 12a. These fuse connection terminal portions 16 are press contact terminals in which a slot 16a is cut 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 mold member 18. The bus bar mold member 18 exposes the narrow width portion 15a of the fusible link portion 15 and the input terminals 13 and 14 and the relay terminal portion 17. In addition, a fuse input terminal cavity 19 that accommodates the input terminal 20 a of the fuse 20 is integrally provided in parallel, and the fuse connection terminal 16 is projected from the cavity 19. The cavity portion 19 constitutes a half portion of the fuse housing portion.
[0018]
The bus bar mold member 18 is detachably incorporated in the case 11 of the relay box 10 so as to penetrate in the vertical direction 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 portion 21 for a fuse output terminal that accommodates the output terminal 20 b of the fuse 20 is arranged in parallel on the upper surface along the insertion hole of the bus bar mold member 18. When the bus bar mold member 18 is assembled in the case 11, the cavity portion 21 is juxtaposed 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. Furthermore, relay accommodating portions 23 and 24 are also formed on the upper surface of the case 11.
[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 protruding 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 connecting the alternator. Moreover, the female terminal connected to the electric wire is fitted and connected to the tab 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. An input terminal portion 40b and a relay connection terminal portion 40c are provided so as to project.
Then, by inserting the relay bus bar 40 into the case 11 from the lower part of the case 11, the pressure contact slot 40 b-1 of the input terminal part 40 b is press-fitted into the relay terminal part 17 of the vertical bus bar 12 and the relay accommodating part 24. 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 in addition to 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 is provided in parallel with the cavity portion 21 of the case 11 to form a fuse housing portion 22 in which a plurality of fuses 20 are mounted in parallel. A fuse 20 is mounted on the.
As shown in FIG. 1B and FIG. 5, the input terminal 20 a of the fuse 20 is inserted into the cavity 19 and is press-connected to the press-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 press contact slots 41b-1 and 41c-1 from the upper end of the strip-shaped substrate portion 41a. 41b and a relay connection terminal portion 41c are provided in a projecting manner.
Then, by inserting the fuse bus bar 41 from below the case 11, the press contact slot 41b-1 of the fuse load side connection terminal portion 41b of the fuse bus bar 41 is press-fitted into the output terminal 20b of the fuse 20, and the relay is accommodated. 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 press-fitted 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 portion 13 of the vertical bus bar 12 to the fusible link portion 15 by the substrate portion 12 a, and a part of the fusible link portion 15. The output side tab 15b is directly connected to the electric wire.
The fuse connecting terminal 16 projecting 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 connecting terminal. Portion 16 → An input terminal 20a of the fuse 20 and a circuit are formed. Further, downstream of the fuse 20, the fuse bus bar 41 is connected to the relay 29.
[0025]
Further, the power supplied from the input terminal portion 13 of the vertical bus bar 12 is directly connected to the relay 29 via the relay bus bar 40, and a circuit that flows from the battery → the input terminal portion 13 → the relay bus bar 40 → the relay 29 is also available. It is formed.
[0026]
In the relay box 10 having the above configuration, the fusible link portion 15 is formed integrally with the vertical bus bar 12, so that it is not necessary to mount a separate fusible link. Moreover, since the fuse connecting terminal portion 16 is also formed integrally with the vertical bus bar 12, the vertical bus bar 12 can absorb the harness 3 and the crimped bus bar 7 shown in FIGS. The fuse can be connected to the fuse via a fusible link portion.
Further, just by accommodating the relay bus bar 40 from below the case 11, the input terminal portion 40b of the relay bus bar 40 is connected to the relay terminal portion 17 of the vertical bus bar 12, and the relay connection terminal portion 40c is connected to the relay. It is connected to the input terminal, and the electrical connection between the vertical bus bar 12 and the relay 29 can be easily performed, so that the workability can be improved and the number of parts can be reduced.
[0027]
Further, a bus bar mold member 18 in which the vertical bus bar 12 is molded is vertically incorporated in the case 11 and provided with an input terminal portion 13 and a fusible link portion 15 serving as a power supply side connection portion at the lower portion, and for a fuse input terminal above. Since the cavity portion 19 is provided, the inside of the case 11 can be used three-dimensionally, and the relay box 10 can be downsized.
In addition, since the fuse accommodating portion 22 is provided with the input side cavity portion 19 in the bus bar mold member 18 and the output side cavity portion 21 is provided in the case 11 to form a split type, the fusible link portion 15 is melted and melted vertically. When it is necessary to replace the bus bar 12, it is not necessary to remove the fuse bus bar 41 connected to the output terminal 20b of the fuse 20, and 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 power supply side input terminal, the fuse connection terminal connected to the fuse input terminal, and the relay terminal part for connection to the relay bus bar are arranged vertically. Since it is provided integrally with the bus bar, the number of components can be greatly reduced. Alternatively, the electrical connection between the vertical bus bar and the relay can be performed simply by accommodating the relay bus bar from the lower side of the case, thereby improving the workability and reducing the number of parts. In addition, it is not necessary to provide the fusible link dedicated block and the fuse dedicated block, and the blocks can be combined into one case, so that the size can be reduced. In addition, since the bus bar mold member in which the vertical bus bar is resin-molded is vertically incorporated inside the case and connected to the connection parts in three dimensions, various advantages such as further reducing the size of the case combined into one. Have
[Brief description of the drawings]
FIG. 1 shows a relay box according to an embodiment of the present invention, in which (A) is a plan view and (B) is a cross-sectional view.
FIG. 2 is a front view of a vertical bus bar.
FIG. 3 shows a bus bar mold member molded with a vertical bus bar, in which (A) is a plan view and (B) 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 form of fuse bus bars;
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 conventional crimp bus bar.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Relay box 11 Case 12 Vertical bus bar 13 Input terminal part 14 for battery connection Input terminal part 15 for alternator connection Fusible link part 16 Fuse connection terminal part 17 Relay terminal part 19 Cavity part 20 for fuse input terminals Fuse 21 Cavities 23 and 24 for fuse output terminals Relay accommodating portions 27 and 29 Relay

Claims (3)

An input terminal portion for battery connection and a relay terminal portion for relay project from the lower end of the substrate portion extending in the longitudinal direction, and a fuse connection terminal portion projects from the upper end, and a narrow portion is provided. The fusible link part is formed integrally, and the relay terminal part for the relay is formed in such a way that the vertical bus bar is connected to the input terminal part without passing through the fusible link part, and the narrow width of the fusible link part. Part, resin-molded except for the input terminal part for battery connection, the relay terminal part for relay and the terminal part for fuse connection to provide a bus bar mold member ,
The bus bar mold member is integrally provided with a cavity portion for a fuse input terminal in which a fuse input terminal is accommodated in parallel, and the fuse connection terminal portion protrudes into the cavity portion. Provided in parallel with the cavity for the fuse output terminal in which the fuse output terminal is accommodated in the case of the relay box to be incorporated,
The bus bar mold member is assembled vertically in the case of the relay box, and the fuse input terminal cavity provided in the bus bar mold member and the fuse output terminal cavity provided in the case are arranged in parallel. A housing portion is formed, and a relay bus bar is housed in the lower portion of the case. An input terminal portion and a relay connection terminal portion project upward from the board portion of the relay bus bar, and the relay bus bar The input terminal portion of the vertical bus bar is connected to the relay terminal portion for the downward relay of the vertical bus bar, and the relay connection terminal portion protrudes into the input side cavity of the relay accommodating portion formed on the upper portion of the case. A relay box for automobiles.   A fuse bus bar is accommodated in a lower portion of the case, and a fuse load side connection terminal portion is projected from the fuse bus bar, and the fuse load side connection terminal portion is formed in a fuse output side cavity formed in the upper portion of the case. The relay box for automobiles according to claim 1, wherein the relay box for automobiles is made to project. The relay relay terminal portion provided on the vertical bus bar has a downward tab shape, while the input terminal portion of the relay bus bar is a pressure contact tab obtained by cutting a pressure contact slot from the tip, and when the vertical bus bar is incorporated in the case, The relay box for an automobile according to claim 1 or 2, wherein the downward tab is press-fitted into a press-contact slot of the press-connect tab and press-connected .

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