JP2006149165A - Electric connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connection box in which a wire harness can be secured surely to a box body and intrusion of liquid such as water can be prevented. <P>SOLUTION: The electric connection box 1 comprises a connection box body 2, and a harness securing portion 18. The connection box body 2 is provided with a box body 4 and a lower cover 5. The box body 4 and the lower cover 5 are fixed each other. Terminal of a wire harness 9 is introduced into the electric connection box 1 while passing between the box body 4 and the lower cover 5. The harness securing portion 18 is provided with a cut 19 and an elastic piece 20 in order to pass the wire harness 9. The cut 19 is provided at the edge of the lower cover 5 close to the box body 4. The elastic piece 20 is formed along the outer wall 10 of the lower cover 5 continuously to the inner edge of the cut 19. The elastic piece 20 is urged in the direction for closing the cut 19. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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 and desired signals to the various electronic devices described above, the automobile has been provided with 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 junction box body that forms an outer shell and a wiring board. The junction box body is fitted with electrical components such as the relays, fuses and fusible links described above, and is fitted with the connectors of the wire harnesses arranged in the automobile described above.

  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. The wiring board includes a bus bar that connects the various electrical components described above and the terminals of the connector of the wire harness according to a predetermined pattern.

  The above-described electrical junction box accommodates a wiring board in a junction box body, mounts desired electrical components on the junction box body, and further fits a connector of a wire harness into the junction box body. Thus, the electrical junction box described above is assembled. The electric junction box is used to supply power and various signals from a power source supplied from a power source and the like to various electronic devices described above that are mounted on an automobile via electric parts such as fusible links and wires of wire harnesses. Supply to equipment.

  The above-mentioned electrical junction box is divided into, for example, two box bodies in which the aforementioned junction box body is detachable from each other, and the terminal of the aforementioned wire harness is led into the junction box body through the aforementioned box body, and the aforementioned junction box body is described. It is conceivable to connect to a bus bar of a wiring board. In this case, in order to guide the terminal of the wire harness to the connection box main body, the above-described box body is provided with a notch, or the wire harness described above is guided to the connection box main body. It is necessary to provide a cover or the like for covering.

  Further, it is conceivable that the above-described electrical junction box is mounted on automobiles of a wide variety of vehicle types. For this reason, it is conceivable that the number of electric wires constituting the wire harness described above is different when the vehicle type is different. That is, it is conceivable that the thickness of the wire harness described above varies depending on the type of automobile.

  For this reason, since it becomes necessary to make the cover mentioned above correspond to the outer diameter of the thickest wire harness, if a thin wire harness is passed through the cover, a backlash (gap) is generated between the thin wire harness and the cover. In this case, there is a possibility that the thin wire harness moves within the cover, and the thin wire harness and the box are repeatedly contacted and separated from each other, and the thin wire harness may be damaged.

  Further, if the thin wire harness is passed through the cover, a gap is generated between the cover and the thin wire harness, and liquid such as water easily enters the junction box body through the gap, which is not desirable.

  Therefore, an object of the present invention is to securely fix the wire harness to the connection box body in the electrical connection box that guides the terminal of the wire harness to the inside through between the boxes, and makes it difficult for liquid such as water to enter inside. It is to provide an electrical junction box that can.

  In order to solve the above problems and achieve the object, an electrical junction box according to the present invention includes a first box and a second box attached to the first box. An electrical connection box comprising a junction box main body, wherein an end of a wire harness is led into the junction box main body through the first box and the second box, wherein the first box Provided in one of the body and the second box, a notch for guiding the wire harness to the connection box body through the wire harness, and one of the first box and the second box An elastic piece that is provided and biased in a direction to close the notch, and that abuts against the wire harness passed through the notch and biases the wire harness toward the inside of the junction box body; It is characterized by having.

  The electrical junction box according to a second aspect of the present invention is the electrical junction box according to the first aspect, wherein the elastic piece is integrated with one outer wall of the first box and the second box. It is characterized by being formed.

  The electrical junction box of the present invention according to claim 3 is the electrical junction box according to claim 1 or 2, wherein the electrical junction box is provided on the other of the first box and the second box, and A harness guide for guiding the wire harness is provided in the notch.

  The electrical junction box according to a fourth aspect of the present invention is the electrical junction box according to the third aspect, wherein the harness guide is formed integrally with the other of the first box and the second box. It is characterized by having.

  According to the electrical connection box of the present invention described in claim 1, since the elastic piece biases the wire harness toward the inside of the connection box body, the wire harness can be reliably fixed to the connection box body. Further, since the elastic piece is biased in the direction of closing the notch, the notch opens only with a minimum size through which the wire harness is passed.

  Moreover, since the elastic piece is urged in the direction of closing the notch, the wire harnesses of various thicknesses can be reliably urged toward the inside of the junction box body.

  According to the electrical junction box of the present invention described in claim 2, since the elastic piece is integral with one of the first box and the second box, it is possible to prevent the number of parts from increasing.

  According to the electrical junction box of the present invention described in claim 3, since the harness guide is provided, the wire harness can be positioned in the junction box body.

  According to the electrical junction box of the present invention described in claim 4, since the harness guide is integral with the other of the first box and the second box, the number of parts can be prevented from increasing.

  As described above, the present invention according to claim 1 can securely fix the wire harness to the junction box body. Further, since the notch opens only with a minimum size through which the wire harness is passed, it becomes difficult for liquid such as water to enter the junction box body.

  In addition, since the elastic piece is biased in the direction to close the notch, various thickness wire harnesses can be reliably biased toward the inside of the connection box body, and various thickness wire harnesses can be connected. Can be securely fixed to the box body.

  According to the second aspect of the present invention, the increase in the number of parts can be prevented, so that an increase in cost can be suppressed.

  According to the third aspect of the present invention, since the wire harness can be positioned in the junction box body, the wire harness can be reliably fixed by the junction box body.

  Since the present invention according to claim 4 can prevent an increase in the number of parts, an increase in cost can be suppressed.

  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 junction box body 2, a wiring board (not shown), a protector 3 as a harness guide, and the like. The connection box main body 2 includes a box main body 4 as a first box and a lower cover 5 as a second box. The box body 4 is made of an insulating synthetic resin and is molded by a well-known injection molding. The box body 4 is formed in a cylindrical shape (box shape) by a plurality of outer walls 6.

  In addition, a plurality of mounting portions on which electrical components such as the relay 7 and the fusible link 8 are mounted are provided on the upper surface 4a of the box body 4 located in the upper part of FIG.

  Further, on the lower surface 4b of the box body 4 located below in FIG. 1, a wire harness 9 (shown by a two-dot chain line in FIG. 1 and indicated by a one-dot chain line in FIG. 2) routed to the automobile described above. The connector is mated. The wire harness 9 includes a plurality of electric wires and a connector attached to the end of the electric wires. The connector is fitted to various electronic devices mounted on the automobile described above and the box body 4 described above.

  The wire harness 9 described above is accommodated in the protector 3 and guided to the space between the box body 4 and the lower cover 5 and then passed through a notch 19 to be described later. Etc. are guided. And the wire harness 9 fits the lower surface 4b of the box main body 4 which the connector mentioned above. Thus, the wire harness 9 is passed between the box body 4 and the lower cover 5, and the terminal to which the connector is attached is guided into the connection box body 2 described above.

  The lower cover 5 is made of an insulating synthetic resin or the like, and is formed by a well-known injection molding. The lower cover 5 includes a plurality of outer walls 10 that are continuous with each other, and is formed in a bottomed cylindrical shape. The outer wall 6 of the box body 4 and the outer wall 10 of the lower cover 5 are provided with locking portions 11 and 12 that lock each other. The lower cover 5 is attached to the box body 4 so that the locking portions 11 and 12 are locked to each other and the lower surface 4b of the box body 4 on which the connector of the wire harness 9 described above is fitted is covered.

  When the box body 4 and the lower cover 5 are assembled to each other, the box body 4 and the lower cover 5 are connected to the upper surface 4a of the box body 4 provided with the mounting portion described above and the lower surface to which the connector of the wire harness 9 is fitted. They are brought closer to each other along an arrow K orthogonal to 4b. The arrow K is in the direction in which the box body 4 and the lower cover 5 approach each other.

  The wiring board includes a conductive bus bar and an insulating plate. The bus bar is obtained by subjecting a conductive sheet metal to press working such as punching. A plurality of bus bars are provided. The plurality of bus bars are overlapped with each other. The insulating plates are arranged between the bus bars that are overlapped with each other, and prevent the bus bars from being electrically connected to each other at unintended locations, that is, short-circuiting and positioning the bus bars.

  The wiring board is accommodated in the box body 4. When the wiring board is housed in the box body 4, the bus bar connects the connector of the wire harness 9 and the electrical components such as the relay 7 and the fusible link 8 mounted on the mounting portion according to a predetermined pattern. Electrically connect to each other.

  The protector 3 is made of an insulating synthetic resin, and integrally includes a protector body 13 and a plurality of band guides 14.

  The protector body 13 is formed in a bowl shape and accommodates the wire harness 9 described above inside. When the protector body 13 accommodates the wire harness 9, the longitudinal direction thereof becomes parallel to the longitudinal direction of the wire harness 9. In the illustrated example, the protector main body 13 is formed in an arc shape in cross section in a direction intersecting the longitudinal direction of the wire harness 9.

  Further, the protector body 13 has one end in the longitudinal direction continuous to the box body 4. That is, the protector 3 is formed integrally with the box body 4. The protector body 13 extends from the corner of the box body 4 toward the outside of the box body 4.

  Three band guides 14 are provided at each of both ends and the center of the protector body 13 in the longitudinal direction. The band guides 14 are provided at both ends in the longitudinal direction of the protector body 13 and at the center in the circumferential direction at both ends and the center in the longitudinal direction of the protector body 13. Each band guide 14 is integrally provided with a pair of standing pieces 15 and one connecting piece 16.

  The pair of standing pieces 15 are erected from the outer peripheral surface of the protector main body 13 in the outer peripheral direction of the protector main body 13. The pair of upright pieces 15 are arranged along the longitudinal direction of the protector main body 13 at intervals. The distance between the pair of upright pieces 15 is a value corresponding to the width of a band 17 (indicated by a two-dot chain line in FIG. 2) for binding the wire harness 9 to the protector body 13, that is, the protector 3. The connecting piece 16 connects ends of the pair of standing pieces 15 on the side away from the outer peripheral surface of the protector body 13 to each other.

  The band guide 14 includes a pair of standing pieces 15 and a connecting piece 16 and is formed in a U shape. The band guide 14 can be passed through the inside of the band guide 14 (that is, between the pair of standing pieces 15 and between the outer peripheral surface of the protector body 13 and the connecting piece 16).

  The protector 3 having the above-described configuration binds the protector body 13 and the wire harness 9 in the protector body 13 with a band 17. Since one end of the protector body 13 is continuous with the box body 4 and extends outward from the corner of the box body 4, the protector 3 guides the wire harness 9 into a notch 19 described later.

  The electrical junction box 1 described above includes a harness fixing portion 18 that fixes the above-described wire harness 9 to the junction box body 2. As shown in FIGS. 3 and 4, the harness fixing portion 18 includes a notch 19 provided in the lower cover 5 and an elastic piece 20.

  The notch 19 is provided in one gap portion of the lower cover 5 and is provided in the two outer walls 10 that are continuous with each other and aligned with the protector 7 along the arrow K described above. The notch 19 is provided at the edge of the outer wall 10 near the box body 4 described above. Of course, the notch 19 cuts through the outer wall 10 described above and penetrates the outer wall 10. That is, the notch 19 communicates the inside and the outside of the lower cover 5, that is, the connection box main body 2.

  The elastic piece 20 is formed in a plate shape along the outer shape of the corner portion of the lower cover 5 provided with the notches 19 described above. The elastic piece 20 has an outer edge connected to one inner edge parallel to the arrow K of the notch 19. The elastic piece 20 is elastically deformable so as to rotate around an outer edge continuous with the inner edge of the notch 19.

  The elastic piece 20 opens and closes the above-described notch 19 by rotating around the above-described outer edge. Further, the elastic piece 20 is located in a neutral state where the elastic piece 20 is not elastically deformed, and both surfaces thereof are substantially parallel to the outer wall 10 provided with the notches 19 and are located outside the outer wall 10 provided with the notches 19. Further, in the neutral state, there is almost no gap (very narrow) between the elastic piece 20 and the outer wall 10 provided with the notch 19.

  Further, as shown in FIGS. 5 to 7, the elastic piece 20 closes the above-described notch 19 when it is rotated around the above-described outer edge so as to be positioned outside the lower cover 5, that is, the junction box body 2. An elastic restoring force is generated in the direction (arrow H in FIGS. 5 to 7). This arrow H is in the direction of closing the notch 19 of the present invention. For this reason, the elastic piece 20 is always urged toward the neutral state described above by its own elastic restoring force.

  That is, the elastic piece 20 is always urged along the arrow H in the direction of closing the notch 19 by its own elastic restoring force. When the wire harness 9 is passed through the notch 19, the elastic piece 20 causes the wire harness 9 to move toward the inner side of the outer cover 10, that is, the lower cover 5 of the connection box body 2 by the elastic restoring force described above. Energize. The elastic piece 20 urges the wire harness 9 with a restoring force corresponding to the outer diameter of the wire harness 9 at a distance corresponding to the outer diameter of the wire harness 9 described above and away from the outer wall 10 described above. Thus, the elastic piece 20, the notch 19, and the wire harness 9 are in close contact with each other.

  The electrical junction box 1 described above is assembled as follows. First, a wiring board is accommodated in the box body 4, and electrical components such as the fusible link 8 and the relay 7 are mounted on a mounting portion provided on the upper surface 2 a of the box body 4.

  Further, the band 17 is inserted into the band guide 14, and the band 17 is attached to both ends and the center of the protector 3 in the longitudinal direction. Then, the connector of the wire harness 9 is fitted to the lower surface 4 b of the box body 4. The wire harness 9 is accommodated in the protector body 13, and the wire harness 9 is bound to the protector body 13 with the band 17 described above.

  Further, the locking portions 11 and 12 are locked to each other, and the box body 4 and the lower cover 5 are attached to each other. Then, the wire harness 9 enters the notch 19, the elastic piece 20 is pressed by the wire harness 9, and the elastic piece 20 is displaced to the outside of the lower cover 5, that is, the connection box body 2. Then, the elastic piece 20 urges the wire harness 9 toward the inside of the junction box body 2.

  Thus, the electrical junction box 1 described above is assembled and mounted on the automobile. Then, the electrical junction box 1 electrically connects the automobile electronic device and electrical components such as the fusible link 8 and the relay 7 according to a predetermined pattern.

  According to this embodiment, since the elastic piece 20 urges the wire harness 9 toward the inside of the connection box body 2, the wire harness 9 can be reliably fixed to the connection box body 2. Further, since the elastic piece 20 is biased in the direction of closing the notch 19, the notch 19, the elastic piece 20 and the wire harness 9 are in close contact with each other, and the notch 19 passes through the wire harness 9 at a minimum. It opens only in size. Therefore, it becomes difficult for liquids such as water to enter the junction box body 2.

  Further, since the elastic piece 20 is urged in the direction H to close the notch 19, the wire harness 9 having various thicknesses can be urged toward the inside of the junction box body 2 with various thicknesses. The wire harness 9 can be securely fixed to the junction box body 2.

  Since the elastic piece 20 is integral with the lower cover 5 and the protector 3 is integral with the box body 4, it is possible to prevent the number of parts from increasing. Therefore, the rise of the electrical junction box 1 can be suppressed.

  Since the protector 3 is provided, the wire harness 9 can be positioned in the junction box body 2. Therefore, the wire harness 9 can be reliably fixed by the junction box body 2.

  In the embodiment described above, the harness fixing portion 18, that is, the notch 19 and the elastic piece 20 are provided in the lower cover 5, and the protector 3 as a harness guide is provided in the box body 4. However, in the present invention, although not shown, the harness fixing portion 18, that is, the notch 19 and the elastic piece 20 may be provided in the box body 4, and the protector 3 as a harness guide may be provided in the lower cover 5. That is, the elastic piece 20 may be provided integrally with the box body 4 and the protector 3 may be provided integrally with the lower cover 5. Further, one of the notch 19 and the elastic piece 20 may be provided on the box body 4 and the other may be provided on the lower cover 5.

  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 side view of the electrical junction box concerning one embodiment of the present invention. It is a perspective view which expands and shows the principal part of the electrical-connection box shown by FIG. It is a top view of the harness fixing | fixed part of the electrical-connection box shown by FIG. It is the perspective view which looked at the harness fixing | fixed part shown by FIG. 3 from the downward direction. It is a top view which shows the state which the harness fixing | fixed part shown by FIG. 2 fixed the wire harness. It is the perspective view which looked at the harness fixing | fixed part shown by FIG. 5 from upper direction. It is the perspective view which looked at the harness fixing | fixed part shown by FIG. 5 from the downward direction.

Explanation of symbols

1 Electrical junction box 2 Junction box body 3 Protector (harness guide)
4 Box body (first box)
5 Lower cover (second box)
6 Outer wall 9 Wire harness 10 Outer wall 19 Notch 20 Elastic piece H Direction to close the notch

Claims (4)

A junction box body having a first box and a second box attached to the first box;
An electrical junction box in which a terminal of a wire harness is led into the junction box body through between the first box and the second box,
A notch that is provided in one of the first box and the second box and guides the wire harness to the connection box body through the wire harness;
The wire is provided in one of the first box and the second box and is urged in a direction to close the notch, and comes into contact with a wire harness passed through the notch. An elastic piece for urging the harness toward the inside of the junction box body;
An electrical junction box comprising:   The electrical connection box according to claim 1, wherein the elastic piece is integrally formed on one outer wall of the first box and the second box.   3. The electricity according to claim 1, further comprising a harness guide that is provided on the other of the first box and the second box and guides the wire harness into the notch. Connection box.   The electrical junction box according to claim 3, wherein the harness guide is formed integrally with the other of the first box and the second box.

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