JP2009171791A - Electrical junction box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical junction box capable of preventing a liquid such as water from permeating a box body while enabling to easily confirm the inside of the box body. <P>SOLUTION: The electrical junction box 1 includes the box body 2, a wiring block 3 and a side cover 7. The box body 2 accommodates a bus bar and a fuse of the wiring box 3. A peephole 19 enabling to visually recognize the fuse is provided on an outer wall 8 of the box body 2. The side cover 7 includes a sealing portion 42 for sealing the peephole 19 when attached on the box body 2. <P>COPYRIGHT: (C)2009,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.

  In addition, since a junction block may have a fuse, a relay, a bus bar, etc., it is also called a fuse block, a relay box, or an electrical connection box (for example, refer patent documents 1 and 2). In the present specification, the above-described fuse block, relay box, and junction block are collectively referred to as an electrical connection box.

  The electric junction box shown in Patent Documents 1 and 2 described above includes a box body forming an outline and a wiring block. The box body is made of an insulating synthetic resin and is formed in a box shape. The box body is provided with a mounting portion on which electrical components such as a relay and a fuse are mounted, and a connector fitting portion into which a connector of the wire harness is fitted.

  The wiring block is accommodated in the box body. The wiring block includes a first bus bar connected to a battery as a first power source, a second bus bar connected to a generator as a second power source, the first bus bar, and the second bus bar. And a connection terminal.

  Each of the first bus bar and the second bus bar is made of conductive sheet metal. The first bus bar and the second bus bar are located in the mounting portion when the power connection portion connected to the battery and the generator and the wiring block are accommodated in the box body, respectively, and the relay. And a terminal portion connected to an electrical component such as a fuse.

  The fuse connects portions of the first bus bar and the second bus bar that are away from the power connection portion. A part of the connection terminal is located in the mounting part and connected to the electrical component such as the relay and the fuse, and the other part is located in the connector fitting part and connected to the connector of the wire harness.

  In the electrical junction box described above, the wiring block electrically connects the power source, the electrical component, and each wire of the wire harness according to a predetermined pattern, and connects to the power source, the electrical component, and each wire of the wire harness. The electronic devices are electrically connected to each other according to a predetermined pattern. And an electrical junction box supplies desired electric power to each electronic device which the wire harness connected.

In addition, the applicant of the present invention is to provide a peep hole on the outer wall of the box body so that the inside of the box body can be visually recognized so that it can be easily grasped whether or not the above-mentioned fuse is blown. It has been proposed (for example, see Patent Document 3).
JP-A-10-241547 JP 2001-155618 A Japanese Patent Application No. 2006-308951

  In the electric junction box shown in Patent Document 3 described above, since the above-described observation hole is provided, liquid such as water easily enters the box body through the inspection hole, which is not desirable.

  Accordingly, an object of the present invention is to provide an electrical junction box that can prevent the inside of the box body from entering a liquid such as water while allowing the inside of the box body to be easily confirmed.

  In order to solve the above-mentioned problems and achieve the object, the electrical junction box according to claim 1 comprises a box main body provided with a peephole that penetrates the outer wall and makes the inside visible, and the box An electrical junction box having a cover member attached to the main body is characterized in that the cover member includes a closing portion that closes the peephole when the cover member is attached to the box main body.

  The electrical junction box according to a second aspect of the present invention is the electrical junction box according to the first aspect, wherein when the cover member is attached to the outer wall of the box body, the position of the closing portion is determined. A misalignment prevention unit for preventing misalignment is provided.

  According to a third aspect of the present invention, in the electric junction box according to the first or second aspect, a terminal fitting is attached to the box body, and a plurality of the observation holes are positioned between each other. Terminal attachment portion is provided, and when the cover member is attached to the box body, the separation wall is spaced from the outer wall, and the cover member is erected from the separation wall toward the outer wall and the closing portion is And a standing wall provided.

  According to the electrical junction box of the present invention as set forth in claim 1, since the cover member is provided with the closing portion that closes the observation hole, even if the inside of the box body can be confirmed through the observation hole, By closing the hole, it is possible to prevent liquid such as water from entering through the hole.

  According to the electrical junction box of the present invention described in claim 2, when the cover member is attached to the box body, it is possible to prevent the displacement of the closing portion.

  According to the electrical junction box of the present invention described in claim 3, since the cover member is provided with the standing wall provided upright from the separation wall and provided with the closing portion, the standing wall includes a plurality of terminal fittings. Positioned between.

  As described above, according to the first aspect of the present invention, even if the inside of the box main body can be confirmed through the observation hole, it is possible to prevent liquid such as water from entering through the observation hole. Therefore, while allowing the inside of the box body to be easily confirmed, liquid such as water can be prevented from entering the box body.

  When the cover member is attached to the box main body according to the second aspect of the present invention, it is possible to prevent the displacement of the closing portion, so that the cover member and the box main body attached to each other can be prevented from relatively moving, These rigidity can be improved.

  According to the third aspect of the present invention, since the standing wall of the cover member is positioned between the plurality of terminal fittings, the terminal fittings can be reliably electrically insulated from each other.

  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 FIG. 1, the electrical connection box 1 includes a box body 2, an upper cover (not shown), a lower cover 6, a side cover 7 as a cover member, and a wiring block 3.

  The box body 2 is made of an insulating synthetic resin and is molded by a known injection molding. As shown in FIG. 2, the box body 2 is formed in a box shape by a plurality of outer walls 8 connected to each other. The box body 2 is provided with a partition wall 9 that partitions the box body 2.

  Further, on the upper surface of the box body 2 in FIG. 2 (hereinafter referred to as the upper surface), a mounting portion to which a relay 20 or a fuse as an electrical component is mounted, and a bus bar 21, which will be described later of the wiring block 3, 2 is provided with a slit-like bus bar receiving groove, and a lower surface (hereinafter referred to as the lower surface) in FIG. ing.

  Of course, the wire harness includes a plurality of electric wires and a connector attached to the end of the electric wires. The connector is fitted to the above-described connector fitting portion and various electronic devices mounted on the automobile. Further, the box body 2 is a bus bar that electrically connects the electrical component mounted on the mounting portion described above and the terminal of the connector of the wire harness fitted in the connector fitting portion according to a predetermined pattern. And more.

  A plurality (two in the illustrated example) of terminal attachment portions 12 are provided on the upper surface of the box body 2. The terminal attachment portion 12 is located at the end of the bus bar housing groove described above, and the surface thereof is formed flat. A nut (not shown) is embedded in the terminal mounting portion 12. Further, these terminal attaching portions 12 are provided in parallel with each other on the outer edge portion of the box body 2.

  On the surface of the terminal mounting portion 12, a connection piece 30 (described later) of the bus bars 21 and 22 and an electric contact portion 13 of a terminal fitting 11 (shown in FIG. 4) connected to a power source (described later) are sequentially stacked. The bolt 10 passing through the through hole 33 provided in the hole 30 and the hole 13a of the electric contact portion 13 is screwed into the nut, so that the electric contact portion 13 of the terminal fitting 11 is connected to the connection piece 30 and the head of the bolt 10. The terminal fitting 11 is attached with being sandwiched between them.

  The upper cover is made of an insulating synthetic resin and is molded by a known injection molding. The upper cover includes a plurality of outer walls that are continuous with each other, and is formed in a bottomed cylindrical shape. The upper cover is attached to the box body 2 so as to cover the upper surface of the box body 2.

  The lower cover 6 is made of an insulating synthetic resin and is molded by a known injection molding. As shown in FIGS. 1 and 3, the lower cover 6 includes a plurality of outer walls 14 that are continuous with each other, and is formed in a bottomed cylindrical shape. The lower cover 6 is attached to the box body 2 so as to cover the lower surface of the box body 2.

  The side cover 7 is made of an insulating synthetic resin and is molded by a well-known injection molding. The side cover 7 is attached to the box body 2 and covers the terminal attachment portion 12 of the cassette block 5 attached to the box body 2. As shown in FIGS. 1 and 2, the side cover 7 is connected to the box main body 2, the separation wall 15 that is spaced from the outer wall 8 of the box main body 2, and the end of the separation wall 15. An upper wall portion 16 that is spaced from the upper surface of the box body 2, and a side wall portion 40 that is erected from both edges of the separation wall 15 and the upper wall portion 16 and contacts the outer wall 8. Is integrated. The side cover 7 is attached to the box body 2 and covers the terminal attachment portion 12 and the terminal fitting 11 attached to the terminal attachment portion 12.

  Further, as shown in FIGS. 5 and 7, the side cover 7 is integrally provided with a standing wall 41 and a closing portion 42. The standing wall 41 is erected from the separation wall 15 toward the outer wall 8 of the box body 2 and is positioned between the two terminal mounting portions 12 described above when the side cover 7 is attached to the box body 2. . The standing wall 41 extends linearly along the direction in which the side cover 7 is brought closer to the box body 2 when the side cover 7 is attached to the box body 2.

  The closing portion 42 is provided at the tip of the standing wall 41 farthest from the separating wall 15. The closing portion 42 extends linearly along the direction in which the side cover 7 is brought closer to the box body 2 when the side cover 7 is attached to the box body 2. It is provided over. A tapered portion 43 that gradually narrows the closing portion 42 as it moves away from the upper wall portion 16 is provided at the distal end portion on the side away from the upper wall portion 16 of the closing portion 42. Further, a surface 42 a of the closing portion 42 facing the outer wall 8 is formed flat along the outer wall 8.

  Moreover, the box main body 2 mentioned above is provided with the fuse storage chamber inside. The fuse housing chamber is a space provided in the box body 2 and a space for housing a fuse 23 described later of the wiring block 3 attached to the box body 2. The fuse housing chamber is formed by being surrounded by a partition wall 9 in the box body 2 and one outer wall 8 on the front side in FIGS.

  The outer wall 8 of the box body 2 constituting the fuse housing chamber is provided with a peep hole 19 and a latch receiving portion 44 as a misalignment prevention portion, as shown in FIGS. ing.

  As shown in FIGS. 3 and 6, the inspection hole 19 is located between the two (plurality) of terminal attachment portions 12 of the outer wall 8, that is, between the two (plurality) of terminal fittings 11 attached to the terminal attachment portion 12. Placed in position. The inspection hole 19 is a long hole extending linearly along the longitudinal direction of the bolt 10 described above, and the fuse 23 housed in the fuse housing chamber, that is, the inside of the box body 2 can be viewed from the outside of the box body 2. It is said. Further, the peep hole 19 allows the fuse 23, that is, the inside of the box body 2 to be visible from the outside of the box body 2 from above in the drawing. Further, the peep hole 19 is covered with the separation wall 15 and the side wall portion 40 of the side cover 7 attached to the box body 2.

  The latch receiving portion 44 is formed so as to protrude from the outer wall 8 and is disposed at a position where the observation hole 19 is positioned between the locking attachment portion 44 and the terminal mounting portion 12. The lock receiving portion 44 is formed in a convex arch shape from the outer wall 8, with both ends connected to the outer wall 8. When the side cover 7 is attached to the box body 2, the locking receiving portion 44 is disposed at a position where the above-described tip portion of the closing portion 42 enters inside as shown in FIG. 4. The locking receiving portion 44 prevents the displacement of the closing portion 42 by allowing the aforementioned tip portion of the closing portion 42 to enter inside thereof.

  Further, when the blocking portion 42 is positioned on the inner side of the locking receiving portion 44, the above-described surface 42 a of the blocking portion 42 is closely overlapped with the outer wall 8, and the blocking hole 42 is blocked by the blocking portion 42. As described above, when the side cover 7 is attached to the box body 2, the closing portion 42 closes the above-described observation hole 19 and the standing wall 41 is positioned between the two terminal fittings 11. The metal fittings 11 are electrically insulated from each other.

  As shown in FIG. 2, the wiring block 3 includes a first bus bar 21, a second bus bar 22, and a fuse 23 connecting these bus bars 21 and 22.

  The first bus bar 21 and the second bus bar 22 are each made of conductive sheet metal. Since these bus bars 21 and 22 have substantially the same configuration, the same portions will be described below with the same reference numerals.

  As shown in FIG. 2, each of the bus bars 21 and 22 includes an electrical component connection part 24 and a power supply connection part 25. The electrical component connecting portion 24 includes a pair of parallel portions 26 that are parallel to each other and a connecting portion 27 that connects ends of the parallel portions 26, and the planar shape is formed in a U shape. The parallel portion 26 is provided with a plurality of terminal portions 28 that are located in the mounting portion of the box body 2 and are connected to the relay 20 and the fuse described above.

  The power supply connection part 25 is integrally provided with a fuse connection piece 29 as a fuse connection part and a connection piece 30 as a connection part. The fuse connection piece 29 is formed in a strip shape, and is attached to be overlapped with the connecting portion 27 of the electrical component connection portion 24. The fuse connecting piece 29 is integrally formed with a nut into which a fuse fixing bolt 31 is screwed.

  The connection piece 30 is erected from an edge located above the fuse connection piece 29 in FIG. For this reason, the fuse connection piece 29 is arranged at a position overlapping the connection piece 30 along the longitudinal direction of the bolt 10. That is, the fuse connection piece 29 is disposed in the vicinity of the connection piece 30 as a connection portion. The connection piece 30 is provided with a through hole 33 through which the bolt 10 passes.

  The terminal fitting 11 connected to the generator as the first power source via the electric wire 34 is attached to the connection piece 30 of the power supply connection portion 25 of the first bus bar 21. A terminal fitting 11 connected to a battery as a second power source via an electric wire 34 is attached to the connection piece 30 of the power supply connection portion 25 of the second bus bar 22.

  The fuse 23 includes a main body portion 35 including a fusible body and a pair of terminal portions 36 extending in a direction away from the main body portion 35. Each terminal portion 36 is provided with a hole through which the fuse connecting bolt 31 is passed. The pair of terminal portions 36 are, of course, connected to the fusible body.

  In the fuse 23, one terminal portion 36 is overlapped with the fuse connection piece 29 of the power supply connection portion 25 of the first bus bar 21, and the other terminal portion 36 is overlapped with the fuse connection piece 29 of the power supply connection portion 25 of the second bus bar 22. The bolts 31 that are overlapped with each other and pass through the holes are screwed into the nuts described above, whereby the bus bars 21 and 22 are connected to each other and attached to these bus bars 21 and 22. When the current flowing between the bus bars 21 and 22 exceeds a predetermined current value, the fuse 23 melts and melts the current between the bus bars 21 and 22.

  In the wiring block 3 described above, the electrical component connection part 24 of the bus bars 21 and 22 is mainly accommodated in the bus bar accommodation groove, the fuse connection piece 29 and the fuse 23 of the power supply connection part 25 are accommodated in the fuse accommodation chamber, and the power connection. The connection piece 30 of the portion 25 is overlaid on the terminal attachment portion 12 and attached to the box body 2. As shown in FIGS. 3 and 6, the wiring block 3 is connected to the generator and the battery via the terminal fitting 11 and the electric wire 34 by attaching the terminal fitting 11 to the terminal attachment portion 12.

  In addition, when the electrical component is mounted on the mounting portion of the box body 2 and the connector of the wire harness is fitted to the connector fitting portion, the wiring block 3 is a variety of electronic devices in which the power source, the electrical component, and the wire harness are connected. Are electrically connected according to a predetermined pattern. And the wiring block 3 supplies the electric power from a power supply to various electronic devices via an electrical component.

  When the electric junction box 1 described above is mounted on an automobile and the automobile travels in a normal state, the side cover 7 is attached to the box body 2 and the closing portion 42 closes the observation hole 19. The position of the closing portion 42 is prevented by the locking receiving portion 44. In addition, the electrical junction box 1 confirms whether or not the side cover 7 is removed from the box body 2 and the fuse 23 in the box body 2 is blown through the observation hole 19 when the automobile is inspected as described above. Is done.

  According to the present embodiment, since the side cover 7 includes the closing portion 42 that closes the observation hole 19, even if the inside of the box body 2 can be confirmed through the observation hole 19, By closing, it is possible to prevent liquid such as water from entering through the peephole 19. Therefore, while allowing the inside of the box body 2 to be easily confirmed, liquid such as water can be prevented from entering the box body 2.

  Further, when the side cover 7 is attached to the box body, it is possible to prevent the positional shift of the closing portion 42, and thus it is possible to prevent the side cover 7 and the box body 2 attached to each other from moving relative to each other. The rigidity of the entire box 1 can be improved.

  Furthermore, since the side cover 7 includes the standing wall 41 that stands from the separation wall 15 and is provided with the blocking portion 42, the standing wall 41 is positioned between the two terminal fittings 11. Therefore, the terminal fittings 11 can be reliably electrically insulated from each other.

  In the above-described embodiment, in order to confirm whether or not the fuse 23 in the box body 2 is blown, the peep hole 19 that makes the inside of the box body 2 visible is provided. However, in the present invention, not only the fuse 23 but also the viewing hole 19 may be used to make the inside of the box body 2 visible for various purposes.

  In the above-described embodiment, two terminal fittings 11 and two terminal attachment portions 12 are provided. However, in the present invention, three or more terminal fittings 11 and three terminal attachment portions 12 may be provided. Furthermore, in embodiment mentioned above, although the side cover 7 is used for the use which covers the terminal attaching part 12 and the terminal metal fitting 11, in this invention, not only this but the side cover 7 is used for various uses. But of course. In the above-described embodiment, the side cover 7 is provided with the standing wall 41 and the outer wall 8 is provided with the latch receiving portion 44. However, in the present invention, the standing wall 41 and the latch receiving portion 44 are not necessarily provided. It is not necessary to provide it.

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

It is a perspective view of the electrical junction box concerning one embodiment of the present invention. FIG. 2 is an exploded perspective view of the electrical junction box shown in FIG. 1. It is a perspective view which shows the state which removed the side cover from the box main body of the electrical-connection box shown by FIG. It is the perspective view which looked at the inner side of the side cover of the electrical junction box of the state shown by FIG. 1 from the downward direction. It is the perspective view which looked at the inner side of the side cover of the electrical junction box of the state shown by FIG. 2 from the downward direction. It is a perspective view which expands and shows the terminal attachment part etc. of the electrical-connection box shown by FIG. It is the perspective view which looked at the side cover of the electrical junction box shown by FIG. 1 from the inner side.

Explanation of symbols

1 Electrical junction box 2 Box body 7 Side cover (cover member)
8 Outer wall 15 Separation wall 19 Peep hole 41 Standing wall 42 Closure part 44 Lock receiving part (position shift prevention part)

Claims (3)

A box body provided with a peephole that penetrates the outer wall and makes the inside visible;
In an electrical junction box provided with a cover member attached to the box body,
The electrical connection box, wherein the cover member includes a closing portion that closes the peephole when the cover member is attached to the box body.   2. The electricity according to claim 1, wherein the outer wall of the box main body is provided with a misalignment preventing portion for preventing a position shift of the closing portion when the cover member is attached to the box main body. Connection box. The box body is provided with terminal fittings and a plurality of terminal attachment portions for positioning the peep holes between them.
The cover member includes a separation wall that is spaced from the outer wall when attached to the box body, and a standing wall that is erected from the separation wall toward the outer wall and is provided with the closing portion. The electrical junction box according to claim 1 or 2, characterized by the above.

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