JP5836688B2 - Electrical junction box - Google Patents

Description

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

  A variety of electronic devices are mounted on automobiles. In order to supply power to these various electronic devices, automobiles have an electrical connection in which electrical components such as fuses and relays are integrated at appropriate locations between a power source such as a battery and the electronic device. A box is installed.

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

  The electrical junction box includes a box body, an electrical component block that is attached to the box body and to which electrical components are mounted, and a power distribution block that is attached to the box body and distributes the power of the power source.

  Such an electrical junction box is attached to an engine room or the like in which various devices such as an engine, an alternator, and a battery are mounted. For this reason, a space in a horizontal direction such as an engine room is limited, and an electric junction box that can be mounted in the limited space is required.

  From the above requirements, an electrical junction box that reduces the vertical projection area has been proposed (see, for example, Patent Document 1). The electrical junction box shown in Patent Document 1 includes an electrical component block to which electrical components are mounted, a power distribution block to which power from a power source is distributed, and the electrical component block mounted in two stages in the vertical direction. And a box body to which the power distribution block is attached. Since the electric component block is attached in two stages in the vertical direction (vertical direction), the dimension in the horizontal direction is suppressed.

JP 2011-10514 A

  However, in the conventional electrical junction box shown in Patent Document 1 described above, the lower electrical component block is not removed from the box body during maintenance of electrical components mounted on the lower electrical component block. An operator cannot contact the electrical parts mounted on the block. For this reason, there is a problem that workability such as maintenance is not good.

  The present invention aims to solve this problem. That is, an object of the present invention is to provide a small electrical junction box with good maintainability.

In order to solve the above problems and achieve the object, the invention described in claim 1 includes a box main body, an electric component block that is mounted in a plurality of stages in the vertical direction of the box main body and on which electric components are mounted, An electrical junction box that is attached to the box body and distributes power from the power source, and the box body is provided with an insertion hole for an electrical component block that is attached to the lower stage of the box body. And the electrical component block attached to the lower stage is formed to be slidable in the horizontal direction of the box body, and the box body is formed in a frame shape extending in the vertical direction, and the electrical component block attached to the upper stage is formed. An electric junction box having a fitting frame to be fitted .

  According to a second aspect of the present invention, a pair of rails are provided in the electrical component block attached to the lower stage, and the pair of rails are guided and slid on the box body. The electrical connection box according to claim 1, wherein a guide rail is provided.

  The invention described in claim 3 is characterized in that the electrical component block attached to the lower stage is provided with protrusions protruding toward the pair of guide rails. This is an electrical junction box.

  According to a fourth aspect of the present invention, in the electric component block attached to the lower stage, a lid portion for closing the insertion hole is provided. It is an electrical junction box as described in an item.

  According to a fifth aspect of the present invention, the lid portion is provided with a locking hole, the peripheral edge portion of the insertion hole is provided with a locking projection to be locked to the locking hole, and The electrical connection box according to claim 4, wherein the locking projection is formed so that the locking with the locking hole is releasable.

  According to the invention described in claim 1, the electrical junction box is provided with the insertion hole of the electrical component block attached to the lower stage in the box body, and the electrical component block attached to the lower stage in the horizontal direction of the box body. Since it was formed to be slidable, the electric component block attached to the lower stage can be pulled out from the insertion hole of the box body. For this reason, the operator pulls out the electrical component block attached to the lower stage from the box body, and can perform maintenance of the electrical component. Therefore, workability such as maintenance is improved.

  According to the second aspect of the present invention, the electrical junction box is provided with a pair of rails in the electrical component block attached to the lower stage, and the pair of guides that are slid by the pair of rails guided by the box body. Since the rail is provided, the electric component block attached to the lower stage can be slid accurately and smoothly.

  According to the invention described in claim 3, since the electrical junction box is provided with the protrusions projecting toward the pair of guide rails on the electrical component block attached to the lower stage, the pair of rails and the pair of rails are provided. A backlash with the guide rail can be prevented.

  According to the invention described in claim 4, since the electrical junction box is provided with the lid portion for closing the insertion hole of the box body in the electrical component block attached to the lower stage, the liquid such as water is supplied from the insertion hole to the box body. It is possible to prevent intrusion into the interior.

  According to the invention described in claim 5, the electrical connection box is provided with the locking hole in the lid portion and the locking protrusion that locks the locking hole at the peripheral portion of the insertion hole. It is possible to prevent the electric component block to be attached from being inadvertently pulled out from the insertion hole of the box body.

  In addition, since the electrical connection box is formed so that the locking projection provided on the peripheral edge of the insertion hole is releasable from the locking hole, the electrical component can be attached to the lower part as needed for maintenance, etc. The block can be pulled out from the insertion hole of the box body.

It is an exploded view for demonstrating the structure of the electrical-connection box concerning one Embodiment of this invention. It is an expanded sectional view for demonstrating a pair of guide rail of a box main body, and a pair of rail of the lower-stage electrical component block guided by this pair of guide rail. It is a figure which shows the state in which a lower-stage electrical component block is inserted in the insertion hole of a box main body.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.

  As shown in FIG. 1, an electrical junction box 1 according to an embodiment of the present invention includes a box body 2, an upper cover 4 attached to the upper surface of the box body 2, and a side attached to a side surface of the box body 2. A cover 5 and a lower cover 6 attached to the lower surface of the box body 2 are provided.

  In addition, the arrow X in FIG. 1 thru | or FIG. 3 has shown the direction parallel to a horizontal direction, and has shown the transversal direction of the box main body 2, The arrow Y has shown the direction parallel to a horizontal direction. In addition, the longitudinal direction of the box body 2 is shown, and the arrow Z indicates the direction parallel to the vertical direction and the vertical direction of the box body 2. Further, the upper side in the paper direction in the arrow Z direction is expressed as “up”, and the lower side in the paper direction in the arrow Z direction is expressed as “lower”.

  The box body 2 includes a body portion 3 formed in a frame shape, a power distribution block 10 that is mounted in the body portion 3 and distributes power from a power source, and an electrical component block that is mounted on the upper stage in the body portion 3. As a relay unit 7 and an electric component block 8 attached to the lower part of the main body 3. The relay unit 7 and the electrical component block 8 are attached to the box body 2 in two stages in the vertical direction Z.

  The main body 3 is formed of an insulating resin and is formed by a known injection molding. The main body 3 is formed in a frame shape with outer walls that are continuous with each other. The main body 3 includes an attachment portion (not shown) of the power distribution block 10, an attachment frame 12 to which the relay unit 7 is attached, an engagement portion 63 engaged with the upper cover 4, and the side cover 5. The engaging protrusion 62 to be engaged, the engaging portion 61 to be engaged with the lower cover 6, the insertion hole 27 through which the electric component block 8 attached to the lower stage is inserted, and the electric component portion record 8 described later. A pair of guide rails 24 that are guided and slid.

  The mounting portion is provided on the inner peripheral surface of the outer wall of the main body portion 3 and is formed in a frame shape along the outer shape of the power distribution block 10. The attachment portion is formed so that the power distribution block 10 is fitted and fixed.

  The attachment frame 12 is provided on the upper part of the inner peripheral surface of the outer wall of the main body 3 and is formed in a frame shape along the outer shape of the relay unit 7. The mounting frame 12 is formed so that the relay unit 7 is fitted and fixed. In the illustrated example, the attachment frame 12 is formed such that the relay units 7 are attached in two rows. Further, the attachment frame 12 is provided with an attachment portion 14 to which a relay 16 as an electrical component is attached.

  The insertion hole 27 is provided in the outer wall on one end side in the longitudinal direction Y of the main body 3. The insertion hole 27 is formed in a square shape by opening the outer wall of the main body 3. A pair of locking projections 28 that are locked to a pair of locking holes 29 of the lid portion 32 of the electrical component block 8 that is attached to the lower stage, which will be described later, are provided on the peripheral edge of the insertion hole 27.

  The pair of locking projections 28 are formed so as to protrude from both end sides in the lateral direction X of the main body 3 at the peripheral edge of the insertion hole 27. As shown in FIG. 3, the pair of locking projections 28 have tip portions formed in a hook shape.

  As shown in FIGS. 1 and 2, the pair of guide rails 24 are respectively provided on the outer wall of the main body 3 and the partition wall 40. The pair of guide rails 24 are formed by rails 25 and 26 that extend along the longitudinal direction Y of the main body 3. The rail 25 is formed in an L-shaped cross section by bending the tip side downward. The rail 26 is formed in an L-shaped cross section by bending the tip side upward.

  As shown in FIG. 1, the power distribution block 10 includes a block body 11, a power input terminal 65 to which a terminal of a power cable (not shown) is attached, and a bus bar that distributes power input from the power input terminal 65. And.

  The block main body 11 is made of an insulating synthetic resin. The block body 11 includes a mounting portion 67 on which fuses and relays as electrical components are mounted, an electrical connection portion provided on the lower surface of the block body 11 and connected to an electric wire and a wire harness (not shown), and the box The main body 2 includes an engagement protrusion that is engaged with the attachment portion of the main body 3.

  The bus bar is formed of a conductive sheet metal. The bus bar is electrically connected to the power input terminal 65. The bus bar is configured to distribute the power input from the power input terminal 65 to the mounting portion 67 and the electrical connection portion of the main body according to a predetermined pattern. The bus bar is formed by known punching and pressing.

  The electrical connection portion is provided on the lower surface of the block main body portion 11. The electrical connection part is provided at a terminal of a wire harness that supplies power to various electronic devices mounted on a vehicle such as an automobile, and at a terminal of an electric wire that supplies power to the mounting part 14 of the relay 16. A terminal fitting provided at the end of an electric wire that supplies power to the mounting frame 12 to which the relay unit 7 is attached, and an end of an electric wire that supplies electric power to the electrical component block 8 attached to the lower stage. The provided terminal fitting is fitted and formed so as to be electrically connected to the bus bar according to a predetermined pattern.

  The relay unit 7 is formed of an insulating synthetic resin. The relay unit 7 is formed in a rectangular parallelepiped box shape. On the upper surface of the relay unit 7, a fuse mounting portion 13 to which a fuse as an electrical component is mounted is provided. The lower surface of the relay unit 7 is provided with a connector fitting portion into which a connector provided at the end of the electric wire connected to the block main body portion 11 of the power distribution block 10 is fitted. In the relay unit 7, a plurality of relays as electrical components and a printed circuit board or bus bar constituting the circuit are provided.

  A plurality of fuse mounting portions 13 (four in the illustrated example) are provided at equal intervals along the longitudinal direction Y of the main body portion 3. The fuse mounting portion 13 is arranged so that the printed circuit board or the bus bar is electrically connected to the fuse when the fuse is mounted on the fuse mounting portion 13.

  When the connector of the electric wire connected to the block main body 11 of the power distribution block 10 is fitted to the connector fitting portion, the printed circuit board or the bus bar is electrically connected to the connector. Are arranged to be connected to each other.

  The printed circuit board or bus bar provided in the relay unit 7 predetermines the plurality of relays, the relay mounted on the fuse mounting portion 13 and the connector fitted on the connector fitting portion. Electrical connection is made according to the pattern.

  The electrical component block 8 attached to the lower stage includes a mounting portion on which relays 18 and 19 as electrical components are mounted, and terminal fittings provided at the ends of the electric wires connected to the block main body portion 11 of the power distribution block 10. The electrical connection portion to be fitted, a pair of rails 20 formed to extend in the longitudinal direction Y of the main body portion 3, and a ridge 23 protruding toward the pair of guide rails 24 of the main body portion 3 (Shown in FIG. 2) and a lid portion 32 for closing the insertion hole 27 of the main body portion 3.

  The mounting portion is provided on the upper surface of the electrical component block 8. The mounting portion is provided with terminal fittings that are connected to the terminals of the relays 18 and 19 when the relays 18 and 19 are mounted on the mounting portion.

  The electrical connection portion is provided on the lower surface of the electrical component block 8. One end side of the terminal fitting provided in the mounting portion is disposed in the electrical connection portion. For this reason, when the terminal fitting provided in the terminal of the electric wire connected with the block main-body part 11 of the said power distribution block 10 is connected to the said electrical-connection part, it is electrically connected with the said one end side.

  As shown in FIGS. 1 and 2, the pair of rails 20 are respectively provided on both side surfaces of the electric component block 8 in a direction intersecting the short direction X of the main body 3. The pair of guide rails 20 are formed by rails 21 and 22 that extend along the longitudinal direction Y of the main body 3. The rail 21 has an L-shaped cross section with its tip end bent upward. The rail 26 is formed in an L-shaped cross section by bending the tip side downward.

  The ridges 23 are respectively provided on both side surfaces of the electric component block 8 in a direction intersecting the short direction X of the main body 3. The ridges 23 are formed so as to protrude toward the distal end side of the pair of guide rails 24, and the distance between the pair of guide rails 24 and the ridges 23 is reduced. For this reason, rattling between the pair of rails 20 and the pair of guide rails 24 is prevented.

  The lid portion 32 is formed in a quadrangular shape along the shape of the insertion hole 27 of the main body portion 3. The lid portion 32 is provided with a locking hole 29 that is locked to a locking projection 28 that protrudes from the peripheral edge of the insertion hole 27. The locking hole 29 and the locking projection 28 are formed such that the locked state can be released by a force for pulling the lid portion 32 from the insertion hole 27.

  The upper cover 4 is made of an insulating synthetic resin. The upper cover 4 is formed by a known injection molding. The upper cover 4 includes a plurality of outer walls that are continuous with each other, and is formed in a bottomed frame shape with an upper portion closed. The upper cover 4 is provided with a knob portion 52 that is engaged with the engaging portion of the main body portion 3 and that can be released by operating the knob. The upper cover 4 is attached to the main body 3 so as to cover the upper surface of the main body 3.

  The side cover 5 is made of an insulating synthetic resin. The side cover 5 is formed by a well-known injection molding. The side cover 5 includes a plurality of outer walls that are continuous with each other, and one side surface is opened. The side cover 5 is provided with an engaging portion 55 to which the engaging protrusion 62 of the main body portion 3 is engaged. The side cover 5 is attached to the main body 3 while covering the side surface of the main body 3.

  The lower cover 6 is made of an insulating synthetic resin. The lower cover 6 is formed by known injection molding. The lower cover 6 includes a plurality of outer walls that are continuous with each other, and is formed in a bottomed frame shape with a lower portion closed. The lower cover 6 is provided with an engaging protrusion 58 that is engaged with the engaging portion 61 of the main body portion 3. The lower cover 6 is attached to the main body 3 while covering the lower surface of the main body 3.

  The electrical junction box 1 configured as described above supplies power to the relay unit 7, the electrical component block 8 attached to the lower stage, various electronic devices, and the like according to a predetermined pattern of the power distribution block 10. .

  Further, as shown in FIG. 3, the electrical junction box 1 can draw out the electrical component block 8 attached to the lower stage in the longitudinal direction Y of the main body 3. For this reason, the relay unit 7 and the electrical component block 8 are arranged in two stages up and down to reduce the vertical projection area, and the workability of the electrical component block 8 attached to the lower stage is improved.

  According to this embodiment, the electrical junction box 1 is attached to the box body 2, the electrical component block 7 that is mounted in a plurality of stages in the vertical direction of the box body 2, and electrical components are mounted thereon, and the box body 2. And a power distribution block 10 that distributes power from the power source, and the box body 2 is provided with an insertion hole 27 of the electrical component block 8 attached to the lower stage of the box body 2; and The electric component block 8 attached to the lower stage is formed to be slidable in the horizontal direction Y of the box body 2.

  For this reason, the electrical connection box 1 is provided with an insertion hole 27 of the electrical component block 8 attached to the lower stage in the box body 2 and slides the electrical component block 8 attached to the lower stage in the horizontal direction Y of the box body 2. Since it is possible to form, the electric component block 8 attached to the lower stage can be pulled out from the insertion hole 27 of the box body 2.

  Therefore, the operator can pull out the electrical component block 8 attached to the lower stage from the box body 2 to perform maintenance of the electrical component. Therefore, workability such as maintenance is improved.

  According to the present embodiment, in the electrical connection box 1, the electrical component block 8 attached to the lower stage is provided with a pair of rails 20, and the box body 2 has the pair of rails 20. A pair of guide rails 24 that are guided and slid are provided.

  For this reason, the electrical junction box 1 is provided with a pair of rails 20 on the electrical component block 8 attached to the lower stage, and a pair of guide rails 24 on which the pair of rails 20 are guided and slid on the box body 2. As a result, the electric component block 8 attached to the lower stage can be slid accurately and smoothly.

  Moreover, according to this embodiment, the electrical connection box 1 is provided with the protrusions 23 protruding toward the pair of guide rails 24 on the electrical component block 8 attached to the lower stage.

  For this reason, the electrical junction box 1 is provided with the protrusions 23 projecting toward the pair of guide rails 24 on the electrical component block 8 attached to the lower stage, whereby the pair of rails 20 and the pair of guide rails. The backlash with 24 can be prevented.

  Further, according to the present embodiment, in the electrical junction box 1, the electrical part block 8 attached to the lower stage is provided with the lid portion 32 that closes the insertion hole 27.

  For this reason, the electrical junction box 1 is provided with a lid portion 32 for closing the insertion hole 27 of the box body 2 in the electrical component block 8 attached to the lower stage, so that liquid such as water can be discharged from the insertion hole 27. Intrusion into the interior of the can be prevented.

  Further, according to the present embodiment, in the electrical junction box 1, the lid portion 32 is provided with the locking hole 29, and the peripheral edge portion of the insertion hole 27 is locked to the locking hole 29. A locking projection 28 is provided.

  For this reason, the electrical junction box 1 is attached to the lower portion by providing a locking hole 29 in the lid portion 32 and providing a locking projection 28 for locking to the locking hole 29 on the peripheral edge of the insertion hole 27. It is possible to prevent the electrical component block 8 to be inadvertently pulled out from the insertion hole 27 of the box body 2.

  Further, according to the present embodiment, the electrical connection box 1 is formed such that the locking projection 28 can be released from the locking hole 29.

  For this reason, the electrical connection box 1 is provided with a locking projection 28 provided on the peripheral edge of the insertion hole 27 so that the locking with the locking hole 29 can be released, so that it can be used for maintenance or the like. The electric component block 8 attached to the lower part can be pulled out from the insertion hole 27 of the box body 2.

  In the above-described embodiment, an electric junction box in which the electrical component blocks are arranged in two stages up and down is illustrated, but the electrical component block attached to the lower stage may be formed to be slidable with respect to the box body. Therefore, the electrical component blocks may be arranged in multiple stages such as three stages up and down. In addition, the electrical component block is a block in which the electrical component is mounted, a unit in which the electrical component is accommodated, a complex thereof, or a block formed by combining a plurality of blocks It may be.

  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.

1 Electrical junction box 2 Box body 7 Relay unit (Electrical component block)
DESCRIPTION OF SYMBOLS 8 Electrical component block attached to the lower stage 10 Power distribution block 20 A pair of rail 23 A protrusion 24 A pair of guide rail 27 Insertion hole 28 Locking protrusion 29 Locking hole 32 Cover part Y Longitudinal direction (horizontal direction)
Z Vertical direction

Claims (5)

A box body, an electrical component block mounted in multiple stages in the vertical direction of the box body and mounted with electrical components, and a power distribution block attached to the box body and distributing power from a power source. In the electrical junction box,
The box body is provided with an insertion hole for an electrical component block attached to the lower stage of the box body, and
The electrical component block attached to the lower stage is formed to be slidable in the horizontal direction of the box body ,
The said box main body has an attachment frame with which the electrical component block formed in the frame shape extended in an up-down direction and attached to an upper stage is fitted . The electrical component block attached to the lower stage is provided with a pair of rails, and
The electrical junction box according to claim 1, wherein the box body is provided with a pair of guide rails that are slid and guided by the pair of rails.   The electrical connection box according to claim 2, wherein the electrical component block attached to the lower stage is provided with a protrusion that protrudes toward the pair of guide rails.   4. The electrical junction box according to claim 1, wherein a lid for closing the insertion hole is provided in the electrical component block attached to the lower stage. 5. The lid is provided with a locking hole,
A locking projection to be locked to the locking hole is provided on the peripheral edge of the insertion hole, and
The electrical connection box according to claim 4, wherein the locking projection is formed so that the locking with the locking hole can be released.

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