JP5156499B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box mounted on an automobile or the like as a moving body.

  In general, automobiles as moving bodies are equipped with a wide variety of electronic devices such as lamps such as head lamps and tail lamps, and motors such as motors for starter motors and air conditioners.

  In order to supply electric power to the various electronic devices described above, the automobile has arranged junction blocks at appropriate locations. The junction block is composed of various electric circuit units such as a large number of fuses and relays.

  In addition, since a junction block may have a fuse, a relay, a bus bar, etc., it is also called a fuse block, a relay box, or an electrical connection box (for example, refer patent document 1) generically. In the present specification, the above-described fuse block, relay box, and junction block are collectively referred to as an electrical connection box.

  The electrical connection box includes a box body that forms an outer shell, and a plurality of cassette blocks that are attached to the box body. The box body is formed in a box shape. A space for accommodating a plurality of cassette blocks is provided inside the box body. The cassette block is provided with a fuse mounting portion to which a fuse as an electrical component is attached and a relay mounting portion to which a relay as an electrical component is attached. Moreover, the electrical junction box described above includes a bus bar and a relay terminal as connecting parts for connecting cassette blocks adjacent to each other.

In the electric junction box shown in Patent Document 1 described above, the cassette block is attached to the box body, and the cassette blocks are electrically connected to each other by a bus bar or a relay terminal. The electrical junction box is assembled by attaching a fuse or a relay to the cassette block. Further, a wire harness terminal to which an electronic device is connected is attached to the cassette block. In this type of electrical junction box, power supplied from a power source such as a battery or a generator is branched into a plurality of parts and supplied to each electronic device via a fuse, a relay, and a wire harness.
JP-A-5-161234

  Since the electrical junction box shown in Patent Document 1 described above uses a plurality of bus bars and relay terminals to connect the cassette blocks, the number of parts increases and the number of man-hours for assembly tends to increase. there were.

  Accordingly, an object of the present invention is to provide an electrical junction box that can reduce the number of parts and the number of man-hours required for assembly.

  In order to solve the above problems and achieve the object, an electrical junction box according to the present invention according to claim 1 includes a box main body having a space formed therein, and a plurality of electric connection boxes that are accommodated in the space and attached to the box main body. A cassette bus, a conductive bus bar disposed in the space of the box body and attached to the box body, and a bus bar receiving groove provided in each of the plurality of cassette blocks and receiving the bus bar. It is characterized by.

  The electrical junction box of the present invention according to claim 2 is the electrical junction box according to claim 1, wherein the plurality of cassette blocks are provided with a fuse mounting portion to which a fuse is attached, and the bus bar receiving groove is It is provided in the fuse mounting part.

  The electrical junction box of the present invention according to claim 3 is the electrical junction box according to claim 2, wherein the bus bar has a strip-like main body portion, a terminal portion connected to the main body portion and to which the fuse is attached, It is characterized by being inserted into the bus bar housing groove with the main body portion at the top.

  According to the electrical junction box of the present invention described in claim 1, since the bus bar housing groove for housing a single bus bar is provided across the plurality of cassette blocks, the bus bar is accommodated in the bus bar housing groove. Thus, a plurality of cassette blocks can be connected.

  According to the electrical junction box of the present invention described in claim 2, since the bus bar housing groove is provided in the fuse mounting portion, a plurality of fuse mounting portions, that is, fuses are connected by housing the bus bar in the bus bar housing groove. Can be connected.

  According to the electrical junction box of the present invention described in claim 3, since the bus bar is inserted into the bus bar receiving groove with the main body portion at the top, the terminal portion can be prevented from being caught on the inner surface of the bus bar receiving groove.

  As described above, according to the first aspect of the present invention, a plurality of cassette blocks can be connected by being housed in a single bus bar housing groove. For this reason, since only a bus bar needs to be provided in order to connect the cassette blocks, it is possible to prevent the number of parts from increasing in order to connect the cassette blocks. Furthermore, since a plurality of cassette blocks can be connected by being accommodated in a single bus bar accommodating groove, it is possible to prevent an increase in the number of steps required for connecting the cassette blocks, that is, for assembling an electric junction box. Therefore, it is possible to reduce the number of parts and man-hours required for assembly.

  According to the second aspect of the present invention, since a plurality of fuse mounting portions, that is, fuses can be connected by accommodating the bus bar in the bus bar accommodating groove, power from the power source is easily branched into the plurality of fuses. be able to.

  According to the third aspect of the present invention, since the bus bar is inserted into the bus bar receiving groove with the main body portion at the top, the terminal portion can be prevented from being caught on the inner surface of the bus bar receiving groove. Therefore, the bus bar can be accommodated in the bus bar accommodating groove without damaging the terminal portion, and the fuse can be reliably connected to the terminal portion.

  Hereinafter, an electrical junction box according to an embodiment of the present invention will be described with reference to FIGS. The electrical junction box 1 shown in FIG. 1 according to the present embodiment is mounted on an automobile as a moving body. As shown in FIGS. 1 and 2, the electrical junction box 1 includes a box body 2, a plurality of cassette blocks 3, and one bus bar 4 (shown in FIG. 2).

  The box body 2 is made of an insulating synthetic resin and is molded by a well-known injection molding. The box body 2 is formed in a box shape by a plurality of outer walls 7, and a space K (shown in FIG. 2) is formed inside thereof.

  Each of the cassette blocks 3 is made of an insulating synthetic resin, is molded by a well-known injection molding, and is formed in a box shape. In the illustrated example, three cassette blocks 3 are provided. The cassette blocks 3 are arranged side by side, arranged in the space K in the box body 2, and attached to the box body 2. The cassette block 3 is inserted into the box body 2 from below in FIGS. 1 and 2 and arranged in the space K. 1A and 1B of the cassette block 3 (hereinafter referred to as the upper surface) 3a, a plurality of fuse mounting portions 6 to which fuses 5 are mounted and a plurality of relays to which relays (not shown) are mounted. A mounting portion 7 is provided.

  The plurality of fuse mounting portions 6 are arranged on a straight line. Further, the plurality of fuse mounting portions 6 are arranged so as to be located on the same line when the plurality of cassette blocks 3 are arranged in parallel.

  1 and 2 of the cassette block 3 (hereinafter referred to as the lower surface) are fitted with connectors provided at the terminals of wire harnesses connected to various electronic devices mounted on the automobile. Match.

  Further, the cassette block 3 is provided with a bus bar receiving groove 8 extending linearly. The bus bar housing groove 8 is formed as a recess from the upper surface 3 a of the cassette block 3. The bus bar housing groove 8 is disposed at a position overlapping the fuse mounting portion 6 (that is, the fuse mounting portion 6). Further, the bus bar receiving grooves 8 provided in each of the cassette blocks 3 are in communication with each other and located on the same line when the plurality of cassette blocks 3 are arranged in parallel. Thus, the bus bar housing groove 8 for housing the single bus bar 4 is provided across the plurality of cassette blocks 3.

  The cassette block 3 includes one terminal of the fuse 5 mounted on the fuse mounting portion 6, a relay mounted on the relay mounting portion 7, and a connector terminal of the wire harness, that is, an electric wire of the wire harness. A bus bar (not shown) that is electrically connected in accordance with a predetermined pattern is accommodated.

  Further, the inner surface of the box body 2 and the outer surface of the cassette block 3 are engaged with each other to fix the cassette block 3 to the box body 2 and to engage with an engaging portion for fixing the cassette blocks 3 to each other. And a receiving part. In the illustrated example, the cassette block 3 is inserted into the space K inside the box body 2 from below the box body 2, and the engaging portion and the engagement receiving portion are engaged with each other, The cassette block 3 is fixed.

  The bus bar 4 is made of a conductive sheet metal and is formed in a flat plate shape. As shown in FIG. 3, the bus bar 4 integrally includes a main body portion 9 having a rectangular planar shape and a plurality of terminal portions 10 erected from one edge in the width direction of the main body portion 9. Both ends of the bus bar 4 in the longitudinal direction are fixed to the inner surface of the box body 2.

  Further, the bus bar 4 is housed in the bus bar housing groove 8 of the cassette block 3 inserted into the space K from below the box body 2 while being attached to the box body 2. In the illustrated example, when the bus bar 4 is housed in the bus bar housing groove 8, the bus bar 4 is inserted into the bus bar housing groove 8 with the main body portion 9 as the head. When the bus bar 4 is housed in the bus bar housing groove 8, the terminal portion 10 is located in the fuse mounting portion 6 and is electrically connected to the other terminal of the fuse 5 mounted in the fuse mounting portion 6. . Further, the bus bar 4 is accommodated in the bus bar accommodating grooves 8 of the plurality of cassette blocks 3, and the other terminal of the fuse 5 is attached to the terminal portion 10, whereby the fuses 5 of the cassette block 3, that is, the cassette blocks 3 Are electrically connected.

  The bus bar 4 is connected to a power source (not shown) such as a battery or a generator, and power is supplied from the power source. Further, the bus bar 4 is provided with a plurality of locking receiving holes 11 for locking a locking piece (not shown) of the cassette block 3 when the bus bar 4 is received in the bus bar receiving groove 8. Of course, the latch receiving hole 11 passes through the main body portion 9 of the bus bar 4, and the latch piece latches to fix the bus bar 4 to the cassette block 3, that is, the box body 2.

  The electrical junction box 1 having the above-described configuration is assembled as follows. First, as shown in FIG. 3, the bus bar 4 is attached to the box body 2. Then, the cassette block 3 is sequentially inserted into the space K inside the box body 2 from below the box body 2 in FIG. Then, the bus bar 4 is inserted into the bus bar receiving groove 8 with the main body 9 at the top. The locking piece is locked in the locking receiving hole 11, the bus bar 4 is received in the bus bar receiving groove 8 and fixed to the cassette block, and the engaging portion and the engaging receiving portion are engaged with each other. The cassette block 3 is fixed to the box body 2.

  Then, the fuse 5 is attached to the fuse attachment portion 6, the relay is attached to the relay attachment portion 7, the power source is connected to the bus bar 4, and the connector of the wire harness is fitted to the lower surface of the cassette block 3. Thus, the electrical junction box 1 having the above-described configuration is assembled and attached to the automobile. The electrical junction box 1 branches the power supplied from the power source into a plurality of parts by the terminal portion 10 of the bus bar 4 and the like, and supplies it to each electronic device via the fuse 5, the relay, the wire of the wire harness, and the like.

  According to the present embodiment, the bus bar accommodating groove 8 for accommodating the single bus bar 4 is provided across the plurality of cassette blocks 3, and therefore the plurality of cassettes can be obtained by accommodating the bus bar 4 in the bus bar accommodating groove 8. Blocks 3 can be connected together. For this reason, since only the bus bar 4 has to be provided to connect the cassette blocks 3 to each other, it is possible to prevent an increase in the number of parts for connecting the cassette blocks 3 to each other. Furthermore, since a plurality of cassette blocks 3 can be connected by accommodating a single bus bar 4 in the bus bar accommodating groove 8, the number of steps required for connecting the cassette blocks 3 to each other, that is, for assembling the electrical junction box 1, is increased. Can be prevented. Therefore, it is possible to reduce the number of parts and man-hours required for assembly.

  Further, since the bus bar housing groove 8 is provided in the fuse mounting portion 6, a plurality of fuse mounting portions 6, that is, the fuses 5 can be connected by housing the bus bar 4 in the bus bar housing groove 8. Therefore, the power from the power source can be easily branched into the plurality of fuses 5.

  Furthermore, since the bus bar 4 is inserted into the bus bar receiving groove 8 with the main body portion 9 as the head, the terminal portion 10 can be prevented from being caught on the inner surface of the bus bar receiving groove 8. Therefore, the bus bar 4 can be accommodated in the bus bar accommodating groove 8 without damaging the terminal portion 10, and the fuse 5 can be reliably connected to the terminal portion 10.

  In the embodiment described above, the cassette block 3 is attached to the box body 2 with the bus bar 4 fixed to the box body 2. However, in the present invention, as shown in FIG. 4, the bus bar 4 may be attached to the box body 2 with the cassette block 3 fixed to the box body 2. In FIG. 4, the same parts as those in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted. In the case shown in FIG. 4, the bus bar receiving groove 8 is formed in a concave shape from the lower surface of the cassette block 3, and the bus bar 4 is inserted into the bus bar receiving groove 8 from below the box body 2 with the terminal portion 10 at the head. I try to assemble it.

  In the case shown in FIG. 4 as well, the bus bar receiving groove 8 for receiving a single bus bar 4 is provided across the plurality of cassette blocks 3 in the same manner as in the above-described embodiment. The plurality of cassette blocks 3 can be connected to each other by being accommodated in the unit 8. For this reason, since only the bus bar 4 has to be provided to connect the cassette blocks 3 to each other, it is possible to prevent an increase in the number of parts for connecting the cassette blocks 3 to each other. Furthermore, since a plurality of cassette blocks 3 can be connected by accommodating a single bus bar 4 in the bus bar accommodating groove 8, the number of steps required for connecting the cassette blocks 3 to each other, that is, for assembling the electrical junction box 1, is increased. Can be prevented. Therefore, it is possible to reduce the number of parts and man-hours required for assembly.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is a perspective view showing typically an electric junction box concerning one embodiment of the present invention. It is a top view which shows typically the electrical-connection box shown by FIG. It is a perspective view which shows typically the process of attaching a cassette block to the box main body of the electrical-connection box shown by FIG. It is a perspective view which shows typically the modification of the electrical junction box shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Box body 3 Cassette block 4 Bus bar 5 Fuse 6 Fuse mounting part 8 Bus bar accommodating groove 9 Body part 10 Terminal part K space

Claims (3)

A box body with a space formed inside;
A plurality of cassette blocks accommodated in the space and attached to the box body;
A conductive bus bar disposed in the space of the box body and attached to the box body;
A bus bar housing groove provided in each of the plurality of cassette blocks and housing the bus bar;
An electrical junction box comprising:   The electrical connection box according to claim 1, wherein the plurality of cassette blocks are provided with a fuse mounting portion to which a fuse is mounted, and the bus bar housing groove is provided in the fuse mounting portion.   The bus bar includes a band plate-shaped main body portion and a terminal portion connected to the main body portion and to which the fuse is attached, and is inserted into the bus bar housing groove with the main body portion at the top. The electrical junction box according to claim 2.

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