JP5255966B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electric junction box attached to an engine room of an automobile.

  A variety of electronic devices are mounted on automobiles. In order to supply electric power to these various electronic devices, the automobile has an electrical junction box configured by integrating electrical components such as fuses and relays at appropriate positions between the power source and the electronic device. Has been placed.

  The electrical junction box is also called a junction block, a fuse block, or a relay box. In the present specification, the junction block, the fuse block, and the relay box described above are collectively referred to as an electric connection box.

  FIG. 5 is a cross-sectional view showing a conventional electrical junction box.

  An electrical junction box 101 (see Patent Document 1) shown in FIG. 5 is formed in a cylindrical shape with a plurality of outer walls, and the cylindrical inner side is partitioned into a plurality of spaces by partition walls, and a partition wall A plurality of cassette blocks 109a and 109b attached to the space partitioned by the plurality of joint connectors 104a and 104b, and a joint connector holder 103 attached to the case 102 by attaching the plurality of joint connectors 104a and 104b. The upper cover 107 attached to the upper surface of the case 102 and the lower cover 108 attached to the lower surface of the case 102 are provided. In addition, an arrow Y in FIG. 5 indicates a vertical direction, and an arrow X indicates a horizontal direction.

  The cassette blocks 109a and 109b are formed in a frame shape, and are used to attach electric parts such as fuses and relays and electric wires (not shown). The electric wires attached to the cassette blocks 109a and 109b are routed below the cassette blocks 109a and 109b, that is, on the lower cover 108 side.

The joint connectors 104a and 104b have a housing made of synthetic resin and a bus bar attached in the housing, and a plurality of electric wires 105 (one in the figure, but actually a plurality). Are connected according to a predetermined pattern. Further, the plurality of electric wires 105 are drawn out of the electric junction box 101 from an electric wire outlet 110 formed between the case 102 and the lower cover 108. The joint connector holder 103 to which the joint connectors 104a and 104b are attached is disposed at the center of the case 102.
JP 2001-2111528 A

  However, the conventional electrical junction box 101 described above has the following problems.

  That is, in the electrical connection box 101, the joint connector holder 103 attaches the joint connectors 104a and 104b so that the longitudinal direction of the electric wires 105 coming out of the joint connectors 104a and 104b faces the horizontal direction. As indicated by C, there is a problem that liquid such as water easily enters the joint connectors 104a and 104b through the electric wire 105.

  Further, in the electrical junction box 101, there is a problem that the rigidity of the case 102 is low and easily deformed. However, since the joint connector holder 103 is disposed at the center of the case 102 as described above, that is, Since the joint connector holder 103 is not attached along the inner surface of the outer wall of the case 102, the effect of reinforcing the rigidity of the case 102 by attaching the joint connector holder 103 to the case 102 cannot be expected.

  Further, in the electrical junction box 101, when the lower cover 108 is attached to the case 102, there is a problem that the electric wires attached to the cassette blocks 109a and 109b are easily caught between the lower cover 108 and the case 102.

  Therefore, an object of the present invention is to provide an electrical junction box that can prevent liquid from entering the joint connector.

In order to achieve the above object, the invention described in claim 1 includes a case, a plurality of joint connectors for connecting a plurality of electric wires according to a predetermined pattern, and the plurality of joint connectors. A joint connector holder attached to the case, and a cassette block to which a plurality of electrical components and wires are attached , wherein the joint connector holder is attached so that a longitudinal direction of the electric wire coming out of the connector faces a vertical direction ; The electrical junction box is attached along the inner surface of the outer wall of the case, is attached below the cassette block, and the plurality of joint connectors are arranged in a horizontal direction . It is.

  The invention described in claim 2 is the invention described in claim 1, wherein the joint connector includes an opening into which the electric wire is inserted and a back wall positioned on the opposite side of the opening. The joint connector holder includes a top plate that covers the back wall, and the plurality of joint connectors are attached so that the back wall is positioned above the opening. To do.

According to the invention described in claim 1, the case, the plurality of joint connectors for connecting the plurality of electric wires according to a predetermined pattern, and the plurality of joint connectors, the electric wires coming out of the joint connector Since it has a joint connector holder attached to the case so that the longitudinal direction is oriented in the vertical direction, liquid such as water attached to the electric wire does not move in a direction against gravity, Therefore, liquid can be prevented from entering the joint connector through the electric wire. Therefore, it is possible to provide an electrical junction box that can prevent liquid from entering the joint connector.
Further, since the joint connector holder is mounted along the inner surface of the outer wall of the case and the plurality of joint connectors are mounted so as to be aligned along the horizontal direction, the outer wall, that is, the horizontal direction of the case Stiffness can be improved.
Further, since the joint connector holder is attached below the cassette block to which a plurality of electrical components and electric wires are attached, the electric wires attached to the cassette block by the joint connector holder are pressed toward the inside of the case, It can control that an electric wire protrudes out of a case. Further, since the cassette block and the joint connector holder are arranged along the vertical direction so as to be along the inner surface of the outer wall of the case, the vertical rigidity of the outer wall, that is, the case can be improved.

  According to the invention described in claim 2, the joint connector has an opening into which the electric wire is inserted, and a back wall positioned on the opposite side of the opening, and the joint connector holder is Since it has a top plate that covers the back wall, and the plurality of joint connectors are attached so that the back wall is located above the opening, the liquid falling from above the case The top plate serves as a roof, and the liquid can be prevented from being applied directly to the joint connector. Therefore, it is possible to provide an electrical junction box that can further prevent liquid from entering the joint connector.

  Hereinafter, an electrical junction box according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a cross-sectional view showing an electrical junction box according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a perspective view showing the joint connector and the joint connector holder shown in FIG. FIG. 4 is a perspective view showing a state in which the joint connector holder shown in FIG. 3 is attached to the case.

  The electrical junction box of the present invention is attached to an engine room of an automobile and supplies power to various electronic devices mounted on the automobile. In the present specification, the junction block, the fuse block, and the relay box are collectively referred to as an electric connection box.

  As shown in FIGS. 1 and 2, the electrical junction box 1 includes a case 2, a plurality of cassette blocks 9a, 9b, 9c mounted in the case 2, and a plurality of joint connectors 4a, 4b, 4c. The joint connector holder 3 attached to the case 2 by attaching the plurality of joint connectors 4a, 4b, 4c, the upper cover 7 attached to the upper surface of the case 2, and the lower cover 8 attached to the lower surface of the case 2 ,have. Moreover, the arrow Y in FIG.1 and FIG.2 has shown the vertical direction, and the arrow X has shown the horizontal direction.

  The case 2 is made of an insulating synthetic resin and is formed by a well-known injection molding. As shown in FIG. 4, the case 2 is formed in a rectangular tube shape by a plurality of outer walls 21, 22, 23, and 24, and the inside of the rectangular tube shape is partitioned into a plurality of spaces by partition walls 26. . A mounting portion 25 to which the engine room cover is mounted is provided on the outer surface of the outer wall 21.

  The plurality of cassette blocks 9a, 9b, and 9c are made of an insulating synthetic resin, and are formed in a lattice shape capable of mounting electric parts such as fuses and relays and electric wires 6 by a well-known injection molding. Has been. The electric wires 6 attached to the cassette blocks 9a, 9b, 9c are routed below the cassette blocks 9a, 9b, 9c, that is, on the lower cover 8 side. The cassette block 9 a is attached along the inner surface of the outer wall 21.

  As shown in FIGS. 3 and 4, the joint connectors 4 a, 4 b, 4 c have a box-shaped housing made of synthetic resin and a bus bar attached in the housing, and a plurality of electric wires 5 are connected to each other. The connection is made according to a predetermined pattern. The housing includes an opening 42 into which the plurality of electric wires 5 are inserted, and a back wall 41 positioned on the opposite side of the opening 42. That is, the joint connectors 4a, 4b, 4c are joint connectors into which a plurality of electric wires 5 are inserted from one direction. Moreover, in FIG. 1, although the electric wire 5 inserted in each joint connector 4a, 4b, 4c is shown one each, in fact, there are a plurality of electric wires 5. Moreover, in FIG. 4, the electric wire 5 is abbreviate | omitted. Further, FIG. 4 shows a state in which the top and bottom of the case 2 shown in FIGS. 1 and 2 are reversed.

  Moreover, the electric wires 5 and 6 described above are drawn out of the electric junction box 1 from an electric wire outlet 10 formed between the case 2 and the lower cover 8 as shown in FIG.

  The joint connector holder 3 is made of an insulating synthetic resin and is formed by well-known injection molding. The joint connector holder 3 is attached to the case 2 by attaching a plurality of joint connectors 4a, 4b, 4c.

  The joint connector holder 3 includes a plate-like main body plate 31 for attaching a plurality of joint connectors 4a, 4b, 4c on the surface, and a surface of the main body plate 31 in a state of being arranged along the longitudinal direction of the main body plate 31. A partition plate 32 positioned between the joint connectors 4a, 4b, 4c attached to the base plate, a pair of side plates 34, 35 erected in the same direction as the partition plate 32 from both longitudinal ends of the main body plate 31, and A pair of locking portions 35 provided on each of the side plates 34 and 35, and a top plate 36 covering the back walls 41 of the joint connectors 4a, 4b and 4c attached on the surface of the main body plate 31. Yes. Further, the direction in which the plurality of joint connectors 4a, 4b, 4c attached to the joint connector holder 3 and the longitudinal direction of the electric wires 5 extending from the joint connectors 4a, 4b, 4c are orthogonal to each other.

  In such a joint connector holder 3, as shown in FIGS. 1 and 4, one locking portion 35 is locked to a locking receiving portion provided in the partition wall 26, and the other locking portion 35 is The main body plate 31 is attached to the case 2 in a state along the inner surface of the outer wall 21 by being engaged with an engagement receiving portion provided in the cassette block 9 c attached to the case 2. Further, the joint connector holder 3 is attached below the cassette block 9a. The cassette block 9 c is attached along the inner surface of the outer wall 23 facing the outer wall 21 and the inner surface of the outer wall 24 in contact with the outer wall 21.

  Further, in a state where the joint connector holder 3 is attached to the case 2, the longitudinal direction of the electric wires 5 coming out of the joint connectors 4a, 4b, 4c is parallel to the vertical direction, and the back of each joint connector 4a, 4b, 4c The wall 41 is positioned above the opening 42, and the arrangement direction of the plurality of joint connectors 4a, 4b, 4c is parallel to the horizontal direction.

  Furthermore, as shown in FIG. 2, the joint connector holder 3 is located on the wiring path of the electric wire 6 attached to the cassette block 9a, and presses the electric wire 6 toward the inside of the case 2, The electric wire 6 is restricted from protruding outside the case 2.

  The upper cover 7 is attached to the case 2 so as to cover the upper surface of the case 2 on which various electrical components are mounted.

  The lower cover 8 is attached to the case 2 so as to cover the lower surface of the case 2 in which the plurality of electric wires 5 and 6 are routed.

  The electrical junction box 1 is assembled by attaching the upper cover 7 and the lower cover 8 to the case 2 after the cassette block 9a, 9b, 9c and the joint connector holder 3 are attached to the case 2. And the cover of an engine room is attached to the attachment part 25, and it attaches to the said engine room.

  In the present invention, since the longitudinal direction of the electric wires 5 coming out from the joint connectors 4a, 4b, 4c is oriented in the vertical direction, the liquid such as water adhering to the electric wires 5 can move in a direction against gravity. Therefore, it is possible to prevent liquid from entering the housing of the joint connectors 4a, 4b and 4c through the electric wire 5. Moreover, as shown in FIG. 1, although the longitudinal direction has faced the horizontal direction in the part located in the vicinity of the electric wire outlet 10 of the electric wire 5, in this invention, each joint connector 4a, 4b of the electric wire 5 is at least. , 4c only needs to have a longitudinal direction in the vertical direction.

  Further, in the present invention, the joint connector holder 3 has the top plate 36 located above each joint connector 4a, 4b, 4c, so that, for example, as shown by an arrow B in FIG. The top plate 36 acts as a roof for the liquid that enters the case 2 from the joint of the upper cover 7 and falls from above the case 2, and the liquid is directly applied to the joint connectors 4a, 4b, 4c. Can be prevented. Therefore, liquid can be prevented from entering the housings of the joint connectors 4a, 4b, 4c.

  Further, when deformation occurs in the vicinity of the attachment portion 25, it becomes difficult to attach the cover to the attachment portion 25. Therefore, the outer wall 21 provided with the attachment portion 25 is particularly required to be not deformed. is there. In this regard, in the present invention, the joint connector holder 3 is attached to the back side of the portion of the outer wall 21 where the attachment portion 25 is provided, so that the rigidity in the vicinity of the attachment portion 25 is improved and deformation in the vicinity of the attachment portion 25 occurs. Can be prevented.

  Furthermore, in the present invention, since the joint connector holder 3 is attached to the case 2 so that the main body plate 31 extending in the horizontal direction follows the inner surface of the outer wall 21, the rigidity of the outer wall 21, that is, the case 2 in the horizontal direction can be improved. it can. Furthermore, since the joint connector holder 3 is attached below the cassette block 9a, the vertical rigidity of the outer wall 21, that is, the case 2, can be improved.

  Further, in the present invention, the joint connector holder 3 is attached to the case 2 so as to follow the inner surface of the outer wall 21 of the case 2 and is attached to the lower side of the cassette block 9a. Therefore, as shown in FIG. 3, the electric wire 6 attached to the cassette block 9 a can be pressed toward the inside of the case 2, and the electric wire 6 can be prevented from protruding outside the case 2. Accordingly, when the lower cover 8 is attached to the case 2, it is possible to prevent the electric wire 6 attached to the cassette block 9 a from being caught between the lower cover 8 and the case 2.

  In the present invention, as described above, the cassette block 9c and the joint connector holder 3 are connected by the locking portion 35 and the locking receiving portion, and the cassette block 9c and the joint connector holder 3 Since the outer walls 21 and 23 facing each other are connected, the rigidity of the case 2 against twisting can be improved.

  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 sectional drawing which shows the electrical junction box which concerns on one Embodiment of this invention. It is sectional drawing along the AA line in FIG. It is a perspective view which shows the joint connector and joint connector holder which were shown by FIG. FIG. 4 is a perspective view showing a state where the joint connector holder shown in FIG. 3 is attached to a case. It is sectional drawing which shows the conventional electrical junction box.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Case 3 Joint connector holder 4a, 4b, 4c Joint connector 5 Electric wire 6 Electric wire 9a Cassette block 21 Outer wall 36 Top plate 41 Back wall 42 Opening part

Claims (2)

Case and
A plurality of joint connectors for connecting a plurality of electric wires according to a predetermined pattern;
The joint connector, the joint connector holder attached to the case, attached so that the longitudinal direction of the electric wires coming out of the joint connector is directed in the vertical direction,
A cassette block for mounting a plurality of electrical components and electric wires;
Have,
The joint connector holder is attached along the inner surface of the outer wall of the case, is attached below the cassette block, and the plurality of joint connectors are attached so as to be aligned in the horizontal direction. And electrical junction box. The joint connector has an opening into which the electric wire is inserted, and a back wall located on the opposite side of the opening,
The joint connector holder includes a top plate that covers the back wall, and the plurality of joint connectors are attached so that the back wall is positioned above the opening. Item 3. An electrical junction box according to Item 1.

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