JP2007068274A - Electrical connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical connection box which can contribute to high efficiency cable routing work by preventing a wire from being bitten. <P>SOLUTION: The electrical connection box 1 comprising a case body 2 provided with a portion 8 for fixing a connection member 3 connected with a wire W, and a cover member for closing the opening of the case body 2 to which the connection member 3 is fixed and for containing the wire W is further provided with a member 11 extending from the corner 24 of a frame member 7 forming the fixing portion 8 toward the cover member and having a cross-section similar to the profile of the corner. <P>COPYRIGHT: (C)2007,JPO&INPIT

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.

  Note that the junction block may include a fuse, a relay, a bus bar, and the like, and thus is also referred to as a fuse block, a relay box, or an electrical connection box. 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 junction box includes a box body that forms an outer shell, and a terminal fitting. On the upper surface of the box body, for example, a plurality of mounting portions on which electrical components such as the relays, fuses and fusible links described above are mounted are provided. Moreover, the connector of the wire harness routed by the motor vehicle mentioned above fits in the lower surface of a box main body, for example.

  The wire harness includes a plurality of electric wires and a connector attached to an end portion of the electric wires. The connector is fitted to various electronic devices mounted on the automobile described above and the box body described above. Furthermore, the box body accommodates a bus bar or the like for connecting various electrical components mounted on the mounting portion described above and the terminals of the connector of the wire harness according to a predetermined pattern.

  The terminal fitting is made of a thick conductive sheet metal, and is integrally provided with a flat electric contact portion and an electric wire connecting portion. The electrical contact portion is provided with a hole or notch through which a threaded portion of the bolt can pass. The electrical contact portion is attached to the box body described above, for example, by a bolt passing through the threaded portion in the hole or notch being screwed into the upper surface of the box body.

  The electric wire connecting portion is bent from the electric contact portion described above and is erected from the electric contact portion. The electric wire connecting part includes a caulking piece or the like for caulking an electric wire connected to a power source or the like. An electric wire connection part crimps an electric wire with a crimping piece, and connects with the core wire of this electric wire.

  In the electrical connection box described above, the electrical contact portion of the terminal fitting to which the electric wire is attached is attached to the upper surface of the box body described above with a bolt. At this time, the electric wire connecting portion of the terminal fitting and the electric wire attached to the electric wire connecting portion are kept along the outer wall surface of the box body without being housed in the box body.

  Then, a desired electrical component is mounted on each mounting portion, and the connector of the wire harness is fitted to the lower surface of the box body. Thus, the electrical junction box described above is assembled. The electrical junction box supplies power from a power source supplied from a power source or the like to the electronic device described above via a fusible link, a wire of a wire harness, or the like.

Further, in the electrical junction box described above, various problems have occurred due to the biting of the electric wires when the cover is attached to the cover, and proposals have been made to eliminate the problems. For example, a pair of extraction guide pins are provided to project at a portion to be an electric wire extraction portion on the upper surface of the case body, and a fixing piece extending outward from the case body is provided to be attached to the case body. Passing the electric wire between the drawing guide pins and tightening it in a straight line, it is bound and fixed to the fixed piece with tape or band, and the electric wire is restrained and the expansion of the electric wire is suppressed. Prevention has been attempted (see Patent Document 1).
JP 2000-35831 A

  However, in the conventional electrical junction box, it is necessary to form the extraction guide pin on the case body, and the pin may be broken if the rigidity of the pin is not sufficient. Further, when a plurality of cassette boxes having the connection portion are accommodated in the main body case of the electrical connection box, the inside of the main body case has a hollow shape, and is constituted by a frame member in which almost no planar portion is formed Therefore, it is difficult to form the drawer guide pin, and it is also difficult to form the drawer guide pin thick in order to increase rigidity. For this reason, if the case body is formed in a complicated shape such as a U-shape or an L-shape, the formation position of the drawer guide pin is further limited, which prevents the electric wire from being caught when the cover case is mounted. Therefore, it has been difficult to improve the efficiency of the wiring work.

  Therefore, in view of the above-described problems, an object of the present invention is to provide an electric junction box that can prevent the electric wire from being caught and contribute to the efficiency of the wiring work.

  In order to solve the above-mentioned problems, the electrical junction box according to claim 1, which is made according to the present invention, includes a case main body provided with a mounting portion for mounting a connection member to which an electric wire is connected, and An electrical connection box having a cover member that closes the opening and accommodates the electric wire, and extends from the corner or crossing portion of the frame member forming the mounting portion toward the cover member, and the cross-sectional shape is the corner. It has the extending member which is the shape of a part or a crossing part, It is characterized by the above-mentioned.

  According to the electrical junction box of the present invention described in claim 1, the extending member whose cross-sectional shape is the shape of the corner or the crossing portion is extended from the corner or the crossing portion of the frame member forming the mounting portion. Therefore, since the rigidity of the extending member having a square shape is improved, the extending member can be used for wiring of the electric wire.

  The invention according to claim 2 is the electrical junction box according to claim 1, wherein the extending member is provided at a corner or crossing portion of the frame member in the vicinity where the electric wire is routed. To do.

  According to the electrical junction box of the present invention described in claim 2, since the stretching member is stretched from the corner portion or the crossing portion of the frame member located in the vicinity of routing the electric wire in the electrical junction box, The extending member can be effectively used for the wiring work of the electric wire.

  According to a third aspect of the present invention, in the electrical junction box according to the first or second aspect, the case main body forms a concave groove on an outer wall surface thereof, and the extending member is provided at a corner of the concave groove. It is characterized by being.

  According to the electrical junction box of the present invention described in claim 3, since the extending member is formed at the corner of the recessed groove formed on the outer wall surface of the case body, the recessed member is avoided by the extending member. Electric wires can be routed.

  As described above, according to the electrical junction box of the present invention described in claim 1, the cross-sectional shape is the shape of the corner or the crossing portion from the corner or the crossing portion of the frame member forming the mounting portion in the case body. Since a certain extending member is extended, the extending member having improved rigidity can be formed on the frame member, and therefore, the extending member can be used for wiring of the electric wire. In addition, since the extending member can be formed by extending the corners or intersections of the frame member, it can be easily formed with a mold, and a case for forming a routing pin, hook, etc. There is no need to form a flat portion or the like in the body. Therefore, since an extending | stretching member can be used for the wiring of an electric wire, it can contribute to the efficiency improvement of the wiring operation | work by preventing biting of an electric wire.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the extending member is extended from the corner portion or the crossing portion of the frame member located in the vicinity of the electric wire in the electrical connection box. Since it was made to do, since the extending | stretching member can be used effectively for wiring of an electric wire, the further efficiency improvement of wiring work can be aimed at.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the extending member is formed at the corner of the groove formed in the outer wall surface of the case body. Since the extending member can avoid the concave groove and route the electric wire, it is possible to prevent the electric wire from being bitten by the case main body and the cover member at the concave groove portion.

  Hereinafter, an electric junction box according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a perspective view showing an external appearance of an electrical junction box according to an embodiment of the present invention. 2 is an exploded perspective view showing the electrical junction box shown in FIG. FIG. 3 is a schematic diagram showing an example of wiring of the electric wires on the lower surface of the box body of the electrical junction box shown in FIG. 4 is a side view of the box body box body shown in FIG. FIG. 5 is an enlarged view showing a part of the extending member shown in FIG.

  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 to 5, the electrical junction box 1 includes a box body 2 that is a case body, a cassette block 3 that is a connection member, a lower cover 5 that is a cover member, an upper cover 6, and an extending member 11. And have.

  The box body 2 is made of, for example, an insulating synthetic resin such as polypropylene terephthalate and is formed by a well-known injection molding. The box body 2 is formed in a substantially cylindrical shape (box shape) by a plurality of frames 7. The box body 2 is provided with a plurality of mounting portions 8 for mounting the cassette block 3, the fusible link 3A, and the like. Each of the mounting portions 8 is a space surrounded by a plurality of frame members 7 constituting the outer wall of the box body 2 and the partition plate. In FIG. 1 and FIG. 2 of the mounting portion 8, both ends positioned up and down are open. Further, on the inner surface of the mounting portion 8 of the box body 2, a locking receiving portion (not shown) for locking the locking portion 10 of the cassette block 3 is provided. The outer wall of the box body 2 is provided with a plurality of locking portions 23 that are locked with locking portions 52 described later of the lower cover 5.

  The cassette block 3 is formed in a box shape having a size that can be accommodated in the mounting portion 8. The cassette block 3 is inserted into the mounting portion 8 through the opening on the lower side in FIGS. 1 and 2 of the mounting portion 8. The cassette block 3 is provided with a plurality of terminal accommodating chambers 9 and a plurality of locking portions 10. The terminal accommodating chamber 9 is a linear space provided in the cassette block 3. The longitudinal directions of the terminal accommodating chambers 9 are provided in parallel to each other, and are along the direction in which the cassette block 3 is inserted into the mounting portion 8. Both ends of the terminal accommodating chamber 9 located in the vertical direction in FIG. 2 are open.

  The locking portion 10 is formed so as to protrude from the outer surface of the cassette block 3 and is locked to the locking receiving portion provided on the box body 2 described above. The cassette block 3 is inserted into the mounting portion 8 through the opening described above. The cassette block 3 is fixed to the box body 2 by the locking portion 10 being locked to the locking receiving portion. Thus, the cassette block 3 is fixed to the box body 2 while being accommodated in the mounting portion 8.

  The terminal housing chamber 9 of the cassette block 3 is provided on the upper surface in FIGS. 1 and 2, and an electrical component 4 such as a relay or a fuse is inserted and fixed. In FIG. 1 and FIG. 2, an electric wire (not shown) is attached to the terminal accommodating chamber 9 via a connector or the like from the lower side, that is, the side opposite to the attachment surface of the electric component 4. Each of the wires is electrically connected. That is, a plurality of electric wires are connected to the terminal accommodating chamber 9 according to the number of mounted electrical components 4.

  Further, as shown in FIGS. 1 and 2, the box body 2 is provided with a concave groove 20 that is recessed from a surface (hereinafter referred to as an outer wall surface) 2 </ b> A that is one outer wall. That is, the electrical junction box 1 is provided with a concave groove 20. The concave groove 14 extends linearly along the direction in which the upper surface 21 and the lower surface 22 face each other. The concave groove 20 is provided with a terminal fitting 40 along the groove, and thereafter, the terminal fitting 40 is fixed by the protective cover 50 and the concave groove 14 is closed.

  The terminal metal 40 is integrally provided with a flat electrical contact portion 41 and a wire connection portion 45. The planar shape of the electrical contact portion 41 is a rectangular shape. The electrical contact portion 41 has a hole 42 through which a screw portion of a bolt can pass.

  The electric wire connecting portion 45 includes a bottom plate portion 46 and a plurality of caulking pieces 47. The bottom plate portion 46 is bent from the electrical contact portion 41 and is erected from the electrical contact portion 41. In the illustrated example, the angle formed between the bottom plate portion 46 and the electrical contact portion 41 is approximately 90 degrees. The electric wire connecting portion 45 is provided with the bottom plate portion 46 and thus stands up from the electric contact portion 41.

  The caulking pieces 47 are connected to both edges of the bottom plate portion 46 in the width direction. The caulking piece 47 is bent in a direction approaching the bottom plate portion 46, and the electric wire 48 is sandwiched between the bottom plate portion 46. Thus, the caulking piece 47 caulks the electric wire 48. The electric wire connecting portion 45 is electrically connected to the electric wire 48 while the electric wire 48 is attached by the caulking piece 47 caulking the electric wire 48.

  The lower cover 5 is made of an insulating synthetic resin like the box body 2 and is formed by a well-known injection molding. The lower cover 5 includes a plurality of outer walls 51 different from each other, and is formed in a bottomed cylindrical shape. The outer wall 51 of the lower cover 5 is provided with a plurality of locking portions 52 that lock with the locking portions 23 of the box body 2 described above. The lower cover 5 is brought close to each other so as to be overlapped with the box body 2, and the box body is arranged such that the locking portion 52 is locked to the locking portion 23 of the box body 2 and covers the above-described lower surface of the box body 2. 2 is attached.

  In the lower cover 5, as shown in FIG. 1, a concave groove 52 that is concave from the surface of one outer wall 51 (hereinafter referred to as a lower side outer wall surface) 51 a becomes a groove that is continuous with the above-described concave groove 20. It is provided as follows.

  Similar to the box body 2, the upper cover 6 is made of an insulating synthetic resin and is formed by a well-known injection molding. The upper cover 6 is formed in a lid shape that is substantially the same shape as the upper surface of the box body 2. At the edge of the upper cover 6, a locking portion 61 that locks with the locking portion 26 of the box body 2 is provided. The upper cover 6 is brought close to each other so as to overlap the box body 2, and the locking part 61 is locked to the locking part 26 of the box body 2 so as to cover the above-described upper surface of the box body 2. It is attached to the main body 2.

  The extending member 11 extends from each of the two corners 24 of the recessed groove 20 of the frame member 7 forming the mounting portion 8 toward the lower cover 5 to the vicinity of the inner surface of the lower cover 5. The cross-sectional shape of each extending member 11 is substantially L-shaped, which is the shape of the corner portion 24 of the frame member 7. For example, when sufficient rigidity is required, the cross-sectional shape is increased so that The size of the cross-sectional shape is designed to obtain rigidity suitable for routing. The length of each extending member 11 is designed according to the size of the electric wire, the size when the electric wires are bundled, and the like so as to be a length suitable for the wiring of the electric wires. Moreover, the shape of the extending | stretching member 11 can be formed so that it may become thin toward the front-end | tip from the frame member 11, or can be formed by the same thickness. The extending member 11 is made of the same synthetic resin as the box body 2 and is formed by a well-known injection molding.

  As described above, the extending member 11 is extended from the two corners 24 of the frame member 7 forming the mounting portion 8 in the box body 2 so that the cross-sectional shape becomes the L-shape of the corner 24. Since the extending member 11 with improved rigidity can be formed on the frame member 7, the extending member 11 can be used for wiring of the electric wire. Further, since the extending member 11 can be formed by extending the corner portion 24 of the frame member 7, it can be easily formed by a mold, and a box for forming a routing pin, hook or the like. There is no need to form a flat portion or the like in the main body 2. Therefore, the extending member 11 can prevent the electric wire from being caught and contribute to the efficiency of the wiring work.

  In the best mode, the case where the cross section of the extending member 11 is L-shaped will be described.However, the present invention is not limited to this, and depending on the shape of the corners or crossing portions of the frame member 7, It can be T-shaped, U-shaped, etc. Alternatively, the extending member 11 may be formed only at the corner 24 of the upper concave groove 20 in FIG.

  Further, in this best mode, when the electric wire W connected to the left side of the upper cassette block 3 in FIG. 3 is directly converged on the electric wire converging portion 25 of the box body 2, it crosses the concave groove 20 of the box body 2. For this reason, the groove 20 is bitten, so that the extending member 11 is formed at the corner 24 of the groove 20 so that the electric wire W is routed in the box body 2.

  Thus, by forming the extending member 11 at the corner 24 of the recessed groove 20 formed on the outer wall surface of the box body 2, the extending member 11 can avoid the recessed groove 20 and route the electric wire W. Therefore, it is possible to prevent the electric wire W from being bitten by the box body 2 and the lower cover 5 at the concave groove 20 portion.

  In this best mode, since the extending member 11 is formed to extend from the frame 7 of the corner portion 24 of the concave groove 20, an engaging groove (not shown) for engaging the extending member 11 with the lower cover 5 is used. Is forming. If the extending member 11 is formed in this way, the extending member 11 can be formed only by extending from the corner portion 24 of the frame member 7. In addition, when accommodating the extending member 11 in the lower cover 5, it is possible to increase the thickness of the frame member 7 of the corner portion 24 and form the lower cover 5 so that the extending member 11 engages the lower cover 5. can do.

  The extending | stretching member 11 of the structure mentioned above is assembled | attached as follows. First, the cassette box 3 is mounted on the mounting portion 8 of the box body 3, and a plurality of electric wires W are connected to the cassette box 3. And as shown in FIG. 3, the electric wire W routed in the vicinity of the groove 20 of the box body 2 is routed so as to be engaged with the two extending members 11 and bypass the groove 20. Are bundled together with the electric wire W. Then, the lower cover 5 is brought close to each other so as to be superimposed on the box body 2, and the two extending members 11 are engaged with the box body 2, and the locking portion 52 is locked to the locking portion 23 of the box body 2. Then, the bundled electric wires W attached to the box main body 2 so as to cover the above-described lower surface of the box main body 2 are drawn out from the electric wire converging portion 25 of the box main body 2. Then, after the terminal metal 40 is connected to the terminal, the concave groove 20 of the box body 2 is closed by the protective cover 50.

  As described above, according to the electrical junction box 1 of the present invention, the extending member 11 whose cross-sectional shape is the shape of the corner portion 24 is extended from the corner portion 24 of the frame member 7 that forms the mounting portion 8 in the box body 2. Since the extending member 11 with improved rigidity can be formed on the frame member 7 because it is extended, the extending member 11 can be used for the wiring of the electric wires W. Further, since the extending member 11 can be formed by extending the corner portion 24 of the frame member 7, it can be easily formed by a mold, and a box for forming a routing pin, hook or the like. There is no need to form a flat portion or the like in the main body 2. Therefore, the extending member 11 can prevent the electric wire from being caught and contribute to the efficiency of the wiring work.

  In addition, it can also be extended from the corner | angular part or crossing part of the frame member 7 which routes the electric wire W in the box main body 2. FIG. As described above, the extending member 11 is extended from the corner or the crossing portion of the frame member 7 located in the vicinity of the wiring body W in the box body 2, thereby extending the extending member 11 to the electric wire W. Since it can be used effectively for the routing, the efficiency of the routing work can be improved.

It is a perspective view showing the appearance of the electrical junction box concerning one embodiment of the present invention. It is a perspective view which decomposes | disassembles and shows the electrical-connection box shown by FIG. It is a schematic diagram which shows the example of a wiring of the electric wire in the lower surface of the box main body of the electrical-connection box shown by FIG. It is a side view of the box main body box main body shown by FIG. It is an enlarged view which shows a part of extending | stretching member shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Box main body 3 Cassette block 7 Frame member 8 Mounting part 11 Extending member 20 Groove W Electric wire

Claims (3)

In an electrical junction box having a case main body provided with a mounting portion for mounting a connecting member to which an electric wire is connected, and a cover member for closing the opening of the case main body for mounting the connecting member and accommodating the electric wire,
An electrical connection box characterized by having an extending member that extends from a corner or intersection of a frame member forming the mounting portion toward the cover member and whose cross-sectional shape is the shape of the corner or intersection. .   The electrical connection box according to claim 1, wherein the extending member is provided at a corner portion or a crossing portion of the frame member in the vicinity where the electric wire is routed.   The electrical connection box according to claim 1, wherein the case body has a concave groove formed on an outer wall surface thereof, and the extending member is provided at a corner of the concave groove.

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