JP2009100576A - Electrical connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance workability of a work for attaching a protection lid member to a portion to be protected. <P>SOLUTION: The protection lid member 110 mounting a sliding board portion 118 temporarily on the footprint 82 of a recess 80 for placing a bus bar temporarily while directing a second sidewall 123 toward the side of a portion to be protected is slid on the footprint 82 of a recess 80 for placing a bus bar temporarily, first latching protrusions 117 and 117 of the protection lid member 110 abut against first engaging protrusions 27 and 27 to be hooked thereto thus preventing slide movement of the protection lid member 110, the protection lid member 110 is rotated toward the portion to be protected with the hooking portion of the first latching protrusions 117, 117 and the first engaging protrusions 27, 27 as a fulcrum, and second latching protrusions 127, 127 engage with second latching protrusions 97, 97 thus latching the protection lid member 110 to the portion to be protected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electrical junction box (ie, electric junction) such as a relay box, a fuse box, an electronic control unit box, etc., which is electrically connected to a battery and various electrical components on a vehicle such as an automobile. A block), for example, a protected portion such as a current detection portion having a bus bar and a current sensor that detects a current flowing through the bus bar, and a protective lid member for protecting the protected portion; It is related with the electrical junction box provided.

  Conventionally, various types of electrical junction boxes including a protected part to be protected and a protective lid member such as a cover or a case for protecting the protected part have been proposed (for example, Patent Documents). 1).

  Among various electrical junction boxes, a junction box body fixed to the mounting surface of the vehicle body panel, and an electrical component mounting surface provided on the junction box body and mounted with electrical components such as fuses, relays, etc. And a protection lid member and a part to be protected that is protected by the protection lid member of the electrical component mounting surface. In the electrical junction box 300 shown in FIG. 14 configured as described above, a protected portion 302 is provided at the approximate center of the side end of the electrical component mounting surface 301 of the junction box body.

  As shown in FIG. 15, the protected portion 302 is a fuse mounting portion having a plurality of cavities 303 for mounting fuses. Accordingly, the protection target by the protective lid member 310 shown in FIG. 16 is the protected portion 302 and a fuse (not shown) attached to the protected portion 302.

  As shown in FIG. 16, the protective lid member 310 includes a lid 311, one first side wall 313 among both longitudinal ends of the lid 311, and both longitudinal ends of the lid 311. Among them, the other second side wall 323 is substantially U-shaped in a cross-sectional view in the longitudinal direction.

  The first side wall 313 is provided with two slits 314 and 314, and the slits 314 and 314 form flexible first locking pieces 315 and 315 in a cantilevered manner. On the inner surface of the free end portion of each first locking piece 315, a first locking projection 317 that protrudes in the thickness direction is formed.

  In addition, two slits 324 are provided in the second side wall 323, and one flexible second locking piece 325 is formed in a cantilever shape by these slits 324. A second locking projection 327 is formed on the inner surface of the free end of the second locking piece 325 so as to protrude in the thickness direction.

  The protective lid member 310 configured in this manner is attached so as to cover the protected portion 302. In this case, first, the first locking projections 317 and 317 are two engagements on the outer surface of the protected portion 302. Temporary placement is performed on the mating projections 307 and 307, and the second locking projection 327 is provisionally placed on one engagement projection (not shown) on the outer surface of the protected portion 302.

  Then, the first locking projections 317 and 317 are engaged with the two engagement projections 307 and 307 of the protected portion 302 by pressing the protective lid member 310 from right above toward the protected portion 302. At the same time, the second locking projection 327 is engaged with an engaging projection (not shown) of the protected portion 302, whereby the protective lid member 310 is locked to the protected portion 302, and the lid portion 311 and the first side wall 313. The second side wall 323 covers the protected portion 302.

  By the way, as shown in FIG. 17, it is fixed by screwing S to a mounting surface AS that extends in a direction crossing the extending direction HP of the vehicle chassis and faces the vehicle body panel VBP of the vehicle. There is a need to obtain an electrical junction box that does not hinder the assembly workability even in the assembly form in which the protective lid member 310 is locked to the protected portion 302 of the electrical component mounting surface 301 in a state.

JP-A-10-210629

  However, in the case of the assembly form as described above, in the electrical junction box 300, when the junction box body is fixed to the attachment surface AS as shown in FIG. 17, the protected portion of the electrical component mounting surface 301 is protected. Since 302 faces downward, it is difficult to visually observe the protected portion 302. In particular, when the electrical junction box 300 is disposed at a position below the driver's seat of the vehicle so that the electrical component mounting surface 301 faces obliquely downward, the work space is narrow, and the protective lid member 310 is attached to the protected portion 302 as shown in FIG. Since the worker who is assembled in the direction of the arrow UD has to work with a posture that is difficult to see, there is a high possibility that the workability of the assembly will deteriorate.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the electrical junction box which can improve the workability | operativity of the operation | work which assembles a protection cover member to a to-be-protected part.

In order to achieve the above-described object, the electrical junction box according to the present invention is characterized by the following (1) and (2).
(1) the junction box body;
An electrical component mounting surface provided as an upper surface of the junction box body, and a plurality of electrical components mounted thereon;
A protected portion provided on the electrical component mounting surface;
A first wall forming one of the longitudinal ends of the protected portion;
A first engagement portion formed on the outer surface of the first wall;
A second wall forming the other of the longitudinal ends of the protected portion;
A second engagement portion formed on the outer surface of the second wall;
A protective lid member attachable to the protected portion;
A lid portion formed on the protective lid member so as to cover the upper surface of the protected portion when the protective lid member is attached to the protected portion;
A first side wall extending downward from one of both ends in the longitudinal direction of the lid,
A first locking portion formed on the inner surface of the first side wall;
A slide plate portion formed on the first side wall so as to be juxtaposed with the first locking portion;
A second side wall extending downward from the other of the longitudinal ends of the lid,
A second locking portion formed on the inner surface of the second side wall;
The slide plate portion of the protection cover member has a bottom surface slidably connected to the first wall so as to extend in the longitudinal direction of the protected portion to the outer surface of the first wall and the slide plate portion. A temporary placement recess that regulates the sliding direction on the bottom surface in the longitudinal direction of the protected part to form a slide path of the slide plate part;
With
The protective cover member in which the slide plate portion is temporarily placed on the bottom surface of the temporary placement recess with the second side wall facing the protected portion side is directed toward the first wall along the slide path. The sliding movement of the protective cover member is prevented by slidingly moving on the bottom surface of the temporary placement recess, so that the first engaging portion of the protective lid member is caught by the first engaging portion of the first wall. The protective lid member is rotated toward the protected portion with the hook portion between the first locking portion and the first engaging portion as a fulcrum, and the second locking portion is the second engaging portion. So that the protective lid member is locked to the protected portion.
(2) In the electrical junction box configured as described in (1) above,
The junction box body is fixed to the vehicle such that the electrical component mounting surface faces downward;
Thus, the protective lid member is attached to the protected portion in a state where the protected portion and the temporary placement recess of the electrical component mounting surface are also arranged to face downward.

In the electrical junction box having the above configuration (1), the protective lid member in which the slide plate portion is temporarily placed on the bottom surface of the temporary placement recess with the second side wall directed toward the protected portion side is provided along the slide path. The sliding movement of the protective lid member is prevented by sliding on the bottom surface of the temporary placement recess toward the one wall and contacting the first locking portion of the protective lid member so as to be hooked on the first engaging portion of the first wall. The protective lid member is rotated toward the protected portion with the hook portion between the first locking portion and the first engaging portion as a fulcrum, and the second locking portion engages with the second engaging portion, As a result, the protective lid member is attached to the protected portion. Therefore, according to the electrical junction box having the configuration of (1), the protective lid member can be securely attached to the protected part, so that the workability of assembling the protective lid member to the protected part is improved. Can do.
According to the electrical junction box having the configuration of (2) above, the junction box body is fixed to the vehicle so that the electrical component mounting surface faces downward, whereby the protected portion and the temporary placement recess of the electrical component mounting surface are arranged. Since the protective lid member is attached to the protected portion in a state of being directed downward, it is difficult for such an operator to visually observe the protected portion, and it is normal to assemble the protective lid member to the protected portion. Even if it is difficult to attach the electrical junction box, the protective lid member can be assembled to the protected portion relatively easily.

  ADVANTAGE OF THE INVENTION According to this invention, the workability | operativity of the operation | work which assembles a protective cover member to a to-be-protected part can be improved.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. In the embodiment of the electrical junction box according to the present invention described below, a current detection unit including a bus bar and a current sensor that detects a current flowing through the bus bar as a protection target of the protection lid member. Note that this is an example of a protected part. First, before describing the protective lid member, the above-described current detection unit will be described in detail.

  FIG. 1 is a view showing one embodiment (electric connection box 1) of an electric junction box according to the present invention, and is a top view of a junction box body showing an electric component mounting surface of the electric junction box, and FIG. 3 is an exploded perspective view showing a state before the sensor is assembled to the current detection unit, FIG. 3 is a top view of the current detection unit showing a direction in which the bus bar is inserted into the current detection unit incorporating the current sensor, and FIG. It is a top view of the electric current detection part of the state mounted on the bottom face of a bus-bar temporary placement recessed part.

  FIG. 5 shows a state where the bus bar is slid along the bus bar insertion path toward the through hole of the current sensor from the state shown in FIG. 4, passes through the through hole, and makes the second end abut against the abutment wall. In more detail, the movement of the bus bar in the width direction is restricted by both walls forming the bus bar insertion path of each of the first contact piece receiving recess and the second contact piece receiving recess. In addition, the first screw hole at the first end of the bus bar is aligned with the first screw insertion hole of the first contact piece, and the second screw hole at the second end of the bus bar is the second contact. It is a top view of the electric current detection part of the state aligned with the hole for the 2nd screw insertion of a piece.

  FIG. 6 shows a state of the current detection unit when the bus bar is slid and moved on the bottom surface of the temporary recess of the bus bar toward the through hole of the current sensor with the first end thereof in front of the sliding direction. More specifically, it is a top view of the current detection unit in a state in which the first end portion of the bus bar is in contact with the bus bar erroneous insertion prevention unit and is prevented from entering the bus bar insertion path.

  As shown in FIG. 1, the electrical junction box 1 has a configuration in which a current flowing through a bus bar is detected by a current sensor, and a junction box body 2 that can be fixed to a vehicle body panel, and the junction box body 2 An electrical component mounting surface 5 provided as an upper surface thereof, on which plug-in electrical components such as a blade-type fuse 3 and a relay 4 are mounted, and a current detection unit 10 provided on the electrical component mounting surface 5 are provided. ing.

  As shown in FIG. 1 to FIG. 3, the current detection unit 10 formed on the upper surface of the junction box body 2, that is, the current detection unit 10 that forms a part of the junction box body 2 includes a first synthetic resin. A contact piece receiving recess 20 and a synthetic resin second contact piece receiving recess 40 are formed.

  As shown in FIG. 3, the first contact member 30 made of conductive metal disposed in the junction box body 2 has a first contact piece 32 in which a first screw insertion hole 31 is formed. The first contact piece 32 is disposed in the first contact piece housing recess 20.

  As shown in FIG. 3, the second contact member 50 made of conductive metal disposed in the junction box body 2 has a second contact piece 52 in which a second screw insertion hole 51 is formed. The second contact piece 52 is disposed in the second contact piece housing recess 40.

  The current detection unit 10 includes a current sensor housing chamber 60 made of synthetic resin. The current sensor housing chamber 60 is disposed between the first contact piece housing recess 20 and the second contact piece housing recess 40.

  More specifically, the current sensor housing chamber 60 communicates with the opening on the lower surface of the junction box body 2 and, as shown in FIG. 2, the first contact piece housing recess 20 and the second contact piece housing recess 40. In addition to extending upward from the space, the side wall 61 facing the first contact piece housing recess 20 and the side wall 62 facing the second contact piece housing recess 40 have openings.

  The current detection unit 10 further includes a current sensor 180 accommodated in the current sensor accommodation chamber 60. As shown in FIG. 2, the current sensor 180 has a sensor body 181 and a through hole 182 formed so as to penetrate the sensor body 181.

  In the current sensor 180, one of the openings of the through holes 182 on both side surfaces 183 and 184 of the sensor body 181 is on the first contact piece housing recess 20 side, and the other of the openings of the through holes 182 is the second contact piece. It is inserted into the current sensor housing chamber 60 from the lower surface side of the junction box body 2 so as to face the housing recess 40 side. Note that a confirmation window 65 for exposing the upper surface 185 of the accommodated current sensor 180 is formed on the upper wall of the current sensor accommodation chamber 60.

  As shown in FIGS. 2 and 3, in the current detection unit 10, the second contact piece accommodation recess is formed on the first contact piece 32 in the first contact piece accommodation recess 20 through the through hole 182 of the current sensor 180. A bus bar insertion path 85 extending on the second contact piece 52 in 40 is formed. A contact wall 45 that forms the end of the bus bar insertion path 85 is provided in the second contact piece housing recess 40.

  The current detection unit 10 further includes a conductive metal bus bar 70 as a current-detecting conductor (that is, as an electrical component). The bus bar 70 has a plate-like bus bar main body 71, and a first screwing hole 73 penetrating in the thickness direction into one first end 72 of both ends in the longitudinal direction of the bus bar main body 71. And a second screwing hole 75 penetrating in the thickness direction is formed in the other second end 74 of both ends of the bus bar main body 71 in the longitudinal direction.

  Furthermore, the current detection unit 10 includes a bus bar temporary storage recess 80 that is connected to the first contact piece housing recess 20. As shown in FIG. 3, the bus bar temporary placement recess 80 forms a bus bar slide path 81 aligned so as to be continuous with the bus bar insertion path 85, and has a bottom surface 82 on which the bus bar 70 can be temporarily placed. And has both side surfaces 83, 83 that extend upward from the bottom surface 82 and restrict the sliding direction of the bus bar 70 on the bottom surface 82 to the longitudinal direction of the bus bar 70.

  Now, the bus bar 70 is assembled to the current detection unit 10 as follows after the current sensor 180 is inserted and accommodated in the current sensor accommodating chamber 60 from the opening on the lower surface of the junction box body 2.

  That is, as shown in FIG. 4, the bus bar 70 placed on the bottom surface 82 of the bus bar temporary placement recess 80 is slid along the bus bar insertion path 85 toward the through hole 182 of the current sensor 180.

  As shown in FIG. 5, when the bus bar 70 passes through the through hole 182 and abuts the second end 74 against the abutment wall 45, the busbar insertion path 85 of the first contact piece housing recess 20 is formed. The width direction of the bus bar 70 by both walls 21 and 21 to be formed (more specifically, the bus bar erroneous insertion preventing portions 25 and 25) and the both walls 41 and 41 forming the bus bar insertion path 85 of the second contact piece housing recess 40. Movement is restricted.

  Further, at this time, the first screwing hole 73 of the first end 72 is aligned with the first screw insertion hole 31 of the first contact piece 32, and the second screwing hole 75 of the second end 74 is arranged. Is aligned with the second screw insertion hole 51 of the second contact piece 52.

  In this state, as shown in FIG. 1, the screw portion and the first contact piece of the first bolt (that is, the first screw) 200 inserted through the first screw fastening hole 73 and the first screw insertion hole 31. The first end of the bus bar 70 is maintained such that the contact state between the first end 72 of the bus bar 70 and the first contact piece 32 is maintained by screwing with a first nut (not shown) disposed below the base 32. The unit 72 is fastened to the current detection unit 10.

  On the other hand, as shown in FIG. 1, the screw portion of the second bolt (that is, the second screw) 205 inserted into the second screw fixing hole 75 and the second screw insertion hole 51 and the second contact piece 52. The second end portion 74 of the bus bar 70 is maintained so that the second end portion 74 of the bus bar 70 and the second contact piece 52 are maintained in contact with each other by screwing with a second nut (not shown) disposed below. Is fastened to the current detector 10. At this time, the conductive metal terminal 220 electrically connected to the conductor of the terminal portion 210 of the electric wire electrically connected to the battery (not shown) by an appropriate joining means such as crimping is also provided in the screw hole ( The second bolt 205 inserted into the not-shown bolt is fastened to the current detection unit 10 together with the second end 74 in contact with the second end 74 of the bus bar 70.

  In addition, the 1st volt | bolt 200 and the 2nd volt | bolt 205 have a thread part of a different diameter. Specifically, the first bolt 200 is an M5 bolt, and the second bolt 205 is an M6 bolt having a thread portion having a diameter larger than that of the first bolt 200. Needless to say, the first nut (not shown) and the second nut (not shown) also have female screw portions with different diameters.

  Therefore, the diameter of the first screwing hole 73 of the bus bar 70 corresponds to the diameter of the screw part of the first bolt 200, and the diameter of the second screwing hole 75 of the bus bar 70 is the screw part of the second bolt 205. The diameter is larger than the first screw hole 73 corresponding to the diameter.

  Similarly, the diameter of the first screw insertion hole 31 of the first contact piece 32 also corresponds to the diameter of the screw portion of the first bolt 200, and the diameter of the second screw insertion hole 51 of the second contact piece 52 is also the same. The diameter of the second bolt 205 is larger than that of the first screw insertion hole 31 corresponding to the diameter of the screw portion of the second bolt 205.

  The first end 72 of the bus bar 70 has a portion 76 having a width larger than the width of the second end 74 (in this embodiment, the portions 76 and 76 having a larger width are the first end 72. Are provided so as to protrude from both side surfaces in the width direction).

  Further, at least one of the both walls 21 and 21 of the first contact piece housing recess 20 is formed with a bus bar erroneous insertion preventing portion 25 protruding in the width direction of the bus bar 70 in the bus bar insertion path 85 (this embodiment). In the embodiment, bus bar erroneous insertion preventing portions 25, 25 are provided on the inner surfaces of both walls 21, 21 of the first contact piece housing recess 20).

  With such a configuration, as shown in FIG. 6, the bus bar 70 is slid and moved on the bottom surface 82 of the bus bar temporary storage recess 80 toward the through hole 182 with the first end 72 thereof in the forward direction of sliding. Then, the first end portion 72 comes into contact with the bus bar erroneous insertion preventing portion 25 so as to be prevented from entering the bus bar insertion path 85.

  In the electrical junction box 1 configured as described above, the junction box main body 2 is connected to the first contact piece housing recess 20 to form a bus bar slide path 81 that is aligned with the bus bar insertion path 85 and the bus bar 70. The bus bar temporary placing recess 80 is provided to restrict the sliding direction on the bottom surface 82 of the bus bar 70 to the longitudinal direction of the bus bar 70.

  The bus bar 70 placed on the bottom surface 82 of the bus bar temporary placement recess 80 is slid along the bus bar insertion path 85 toward the through hole 182 of the current sensor 180, passes through the through hole 182, and the contact wall 45. When the second end 74 is brought into contact with the second end 74, the movement of the bus bar 70 in the width direction is caused by the both walls 21 and 41 forming the bus bar insertion paths 85 of the first contact piece receiving recess 20 and the second contact piece receiving recess 40, respectively. The first screw hole 73 of the first end 72 is aligned with the first screw insertion hole 31 of the first contact piece 32, and the second screw hole of the second end 74 is restricted. 75 is aligned with the second screw insertion hole 51 of the second contact piece 52.

  Therefore, according to the electrical junction box 1 having the above-described configuration, workability of assembling the bus bar 70 to the current detection unit 10 is improved.

  In the electrical junction box 1 configured as described above, the first end 72 of the bus bar 70 has a portion 76 having a width larger than the width of the second end 74, and the bus bar insertion path of the first contact piece housing recess 20. At least one of both walls 21 forming 85 is formed with a bus bar erroneous insertion preventing portion 25 protruding in the width direction of the bus bar 70 in the bus bar insertion path 85, and the bus bar 70 has a first end portion thereof. When the front end 72 of the bus bar 70 is slid and moved toward the through hole 182 of the current sensor 180 with the front side 72 in the sliding direction, the first end 72 of the bus bar 70 becomes the bus bar erroneous insertion preventing portion 25. It abuts and is prevented from entering the bus bar insertion path 85.

  Therefore, according to the electrical junction box 1 having the above-described configuration, it is possible to effectively prevent erroneous assembly of the bus bar 70 to the current detection unit 10.

  Furthermore, in the electrical junction box 1 configured as described above, the current sensor housing chamber 60 has openings on the side wall 61 facing the first contact piece housing recess 20 and the side wall 62 facing the second contact piece housing recess 40, respectively. Yes. The openings of both side walls 61 and 62 are provided for smoothly inserting the bus bar 70 into the through hole 182 of the current sensor 180.

  In the electrical junction box 1 having the above-described configuration, the current sensor 180 includes one of the openings of the through holes 182 in the both side surfaces 183 and 184 of the sensor body 181 on the first contact piece housing recess 20 side, and the through hole 182. The other of the openings is inserted into the current sensor housing chamber 60 through the opening on the lower surface of the junction box body 2 so that the other side faces the second contact piece housing recess 40 side.

  Therefore, according to the electrical junction box 1 configured as described above, the first contact piece accommodating recess 20 and the second contact piece accommodating recess 40 are used to insert the current sensor 180 into the current sensor accommodating chamber 60 from the upper surface side of the junction box body 2. Compared with the electrical connection box 1 of the conventional form which requires an opening between, the mechanical strength of the electric current detection part 10 can be raised.

  Furthermore, in the electrical junction box 1 having the above configuration, the current sensor housing chamber 60 has an upper wall on which a confirmation window 65 for exposing the upper surface 185 of the current sensor 180 is formed. It can be confirmed through the confirmation window 65 whether the current sensor 180 is accommodated therein.

  Furthermore, according to the electrical junction box 1 having the above-described configuration, the conductive metal terminal 220 that is electrically connected to the conductor of the terminal portion 210 of the electric wire electrically connected to the battery is inserted into the screw hole. Since the second bolt 205 is fastened to the current detection unit 10 in contact with the second end 74 of the bus bar 70, power is supplied from the battery.

  The electric junction box 1 having the above-described configuration has a configuration in which the current sensor 180 is assembled to the current sensor housing chamber 60 from below. However, the current sensor 180 is mounted on the current sensor housing chamber opening upward from above. The bus bar may be assembled and then assembled as shown in FIGS. 4 and 5.

  FIG. 7 shows the left side of the junction box body 2 in a state of being fixed to a mounting surface AS extending in a direction crossing the extending direction HP of the vehicle chassis and facing obliquely below the vehicle body panel VBP of the vehicle. FIG. In this way, the connection box body 2 is fixed to the attachment surface AS. In this state, the electrical component mounting surface 5 (that is, the current detection unit 10) formed as the upper surface of the connection box body 2 is obliquely below. Turn to. Instead of fixing the junction box body 2 to the vehicle body panel VBP with screws S, the junction box body 2 may be fixed by locking.

  Further, when the connection box body 2 is fixed to the attachment surface AS, the side surface that extends in a direction intersecting the attachment surface AS and faces obliquely below among the four side surfaces of the connection box body 2 is: It becomes the lower surface 7. Further, when the connection box body 2 is fixed to the attachment surface AS, among the four side surfaces of the connection box body 2, the side surface extending in a direction intersecting the attachment surface AS and facing obliquely upward is: It becomes the upper surface 6.

  Now, the current detection unit 10 will be described in more detail with reference to FIGS.

  Of the outer surfaces of both walls 21, 21 forming the bus bar insertion path 85 of the first contact piece receiving recess 20, it was erected so as to face the bus bar temporary setting recess 80 connected to the first contact piece receiving recess 20. On the outer surfaces 26, 26 of the portions having both the substantially L-shape and the substantially inverted L-shape of both walls 21, 21, first engagement projections 27, 27 projecting toward the bus bar temporary placement recess 80 side are formed.

  The terminal holding portion 90 connected to the abutting wall 45 of the second contact piece housing recess 40 is a portion protruding from the side surface (lower surface 7: see FIG. 7) of the connection box body 2, and It is a part of a synthetic resin molded part.

  The terminal holding portion 90 is placed on the base 91 so that the base 91 on which a part of the terminal 220 with the electric wire fixed by the second bolt 205 can be placed and the terminal portion 210 of the electric wire are arranged therebetween. Wall portions 95 and 95 that are erected, and second engagement protrusions 97 and 97 that are formed on the outer surfaces 96 and 96 of the wall portions 95 and 95 facing away from the second contact piece housing recess 40 side. Have.

  In the current detection unit 10, the part of the both walls 21, 21 of the first contact piece housing recess 20 facing the bus bar temporary storage recess 80 is a part that forms one end of the protected part in the longitudinal direction, and the outer surface 26 and 26, the bus bar temporary storage recess 80 is continuously provided so as to extend in the longitudinal direction of the protected portion. In the current detection unit 10, the terminal holding unit 90 is a part that forms the other end of the protected part in the longitudinal direction. Accordingly, the first engagement protrusions 27 and 27 and the second engagement protrusions 97 and 97 protrude in opposite directions in the longitudinal direction of the protected portion of the current detection unit 10.

  Further, third engaging projections 47, 47 projecting in a direction perpendicular to the longitudinal direction of the bus bar 70 are formed on the outer surfaces of both walls 41, 41 forming the bus bar insertion path 85 of the second contact piece receiving recess 40. ing.

  Next, the protective lid member 110 assembled to cover the protected part in order to protect the protected part of the current detection unit 10 will be described with reference to FIG.

  As shown in FIG. 8, the protective lid member 110 includes a lid portion 111 formed so as to cover the upper surface (opening) of the protected portion when the protective lid member 110 is attached to the protected portion of the current detection unit 10. A first side wall 113 extending vertically downward from one of both ends in the longitudinal direction of the lid portion 111, and extending vertically downward from the other of both longitudinal ends of the lid portion 111. The second side wall 123 has a substantially step shape in a longitudinal sectional view. The protective lid member 110 further includes third side walls 130 and 130 extending vertically downward from both end portions in the width direction of the lid portion 111.

  Two slits 114 and 114 are provided in the first side wall 113, and flexible first locking pieces 115 and 115 are formed in a cantilever shape by the slits 114 and 114, respectively. The first locking pieces 115 and 115 constitute both side portions of the first side wall 113. On the inner surface of the free end portion of each first locking piece 115, first locking projections 117, 117 projecting in the thickness direction are formed.

  The first side wall 113 is provided with a slide plate portion 118 between the two slits 114 and 114 so as to be juxtaposed with the first locking pieces 115 and 115. The slide plate portion 118 has a convex shape, and the width of the front end portion (that is, the lower end portion) is the same as the distance (see FIG. 3) between the both side surfaces 83, 83 of the bus bar temporary storage recess 80. Or it is slightly smaller than the distance between both side surfaces 83 and 83.

  The second side wall 123 is provided with second locking pieces 125, 125 each formed in a cantilever shape. These second locking pieces 125, 125 constitute both side portions of the second side wall 123. On the inner surface of the free end portion of each second locking piece 125, second locking projections 127, 127 projecting in the thickness direction are formed.

  One of the third side walls 130, 130 has a third locking protrusion 137 on the lower end and the other has an inner surface on the inner surface (only the third locking protrusion 137 on the lower end of the third side wall 130 is shown). .

  The protective lid member 110 configured in this manner is suitable for assembling the current detection unit 10 in the state shown in FIG.

  That is, as shown in FIGS. 9 and 10, first, the slide plate 118 is temporarily mounted on the bottom surface 82 of the bus bar temporary storage recess 80 of the current detection unit 10 with the second side wall 123 facing the protected portion side. The placed protective lid member 110 controls the first sliding of the bus bar slide path 81 while restricting the sliding direction on the bottom surface 82 of the temporary holding recess 80 of the bus bar by both side surfaces 83, 83 (see FIG. 3) of the temporary holding recess 80 of the bus bar. It is slid and moved toward the contact piece housing recess 20 (that is, in the direction of the arrow SD). In this way, in this example, the bus bar temporary storage recess 80 is used not only for sliding movement of the bus bar 70 but also for sliding movement of the protective lid member 110 (that is, it is also used).

  Next, as shown in FIG. 11, the sliding movement of the protective lid member 110 proceeds from the state of FIGS. 9 and 10, and the first locking projections 117 and 117 of the protective lid member 110 are moved to the first contact piece housing recess 20. The first engagement protrusions 27 and 27 are in contact with each other so as to be prevented from sliding.

  Next, as shown in FIG. 12, the first locking protrusions 117 and 117 of the protective lid member 110 are hooked on the first engaging protrusions 27 and 27 of the first contact piece housing recess 20 as shown in FIG. 11. Thus, the protective lid member 110 is rotated in the direction of the arrow R toward the protected portion with these hooked portions as fulcrums (ie, center points). At this point, it may be considered that the engagement between the first locking protrusions 117 and 117 of the protective lid member 110 and the first engagement protrusions 27 and 27 of the first contact piece housing recess 20 is generally achieved.

  Then, as shown in FIG. 13, the rotation of the protective lid member 110 proceeds from the state of FIG. 12, and the second locking projections 127, 127 of the protective lid member 110 are the second engaging projections 97 of the terminal holding portion 90. , 97 and the third locking projections 137, 137 (see FIG. 8) of the protective lid member 110 engage with the third engagement projections 47, 47 (see FIG. 3) of the second contact piece receiving recess 40. Thus, the protective lid member 110 is locked to the current detection unit 10.

  Here, in order to deepen an understanding of the present invention, the configuration of an embodiment of the electrical junction box according to the present invention will be briefly described.

The electrical junction box 1 includes a junction box body 2, an electrical component mounting surface 5 provided on the junction box body 2 as an upper surface thereof, and a plurality of electrical components (blade type fuse 3 and relay 4) mounted thereon, and electrical components. Of the protected part provided on the mounting surface 5, the first wall (both walls 21, 21) forming one of the longitudinal ends of the protected part, and the first wall (both walls 21, 21) A first engagement portion (first engagement protrusions 27, 27) formed on the outer surfaces 26, 26 and a second wall (wall portions 95, 95) forming the other of both ends in the longitudinal direction of the protected portion. A second engagement portion (second engagement protrusions 97, 97) formed on the outer surface of the second wall (wall portions 95, 95), a protective lid member 110 that can be attached to the protected portion, and a protective lid When the member 110 is attached to the protected part, the protective cover member 110 is formed so as to cover the upper surface of the protected part. The lid 111, the first side wall 113 extending downward from one of the longitudinal ends of the lid 111, and the first locking portion (first Locking projections 117, 117), a slide plate 118 formed on the first side wall 113 so as to be juxtaposed with the first locking portions (first locking projections 117, 117), and the length of the lid 111. A second side wall 123 extending downward from the other of the two end portions in the direction, a second locking portion (second locking protrusions 127 and 127) formed on the inner surface of the second side wall 123, and a first The slide plate 118 of the protective lid member 110 is connected to the first wall (both walls 21, 21) so as to extend in the longitudinal direction of the protected portion to the outer surfaces 26, 26 of the walls (both walls 21, 21). The slide plate has a slidable bottom surface 82 and is slid on the bottom surface 82 of the slide plate portion 118. A temporary placement recess (bus bar temporary placement recess 80) that forms a slide path (bus bar slide path 81) of the slide plate portion 118 by regulating the direction in the longitudinal direction of the protected portion, and the second side wall 123 is covered. The protective lid member 110 having the slide plate portion 118 temporarily placed on the bottom surface 82 of the temporary placement concave portion (bus bar temporary placement concave portion 80) toward the protective portion side is first along the slide path (bus bar slide path 81). The first locking portion (first locking protrusions 117 and 117) of the protective lid member 110 is slid and moved on the bottom surface 82 of the temporary mounting recess (busbar temporary mounting recess 80) toward the walls (both walls 21 and 21). Comes into contact with the first engaging portion (first engaging protrusions 27, 27) of the first wall (both walls 21, 21) so that the sliding movement of the protective lid member 110 is prevented, and the first locking portion (First locking projections 117 and 11 7) and the first engaging part (first engaging protrusions 27, 27) as a fulcrum, the protective lid member 110 is rotated toward the protected part, and the second locking part (second locking part) The protrusions 127 and 127) are engaged with the second engaging portions (second engaging protrusions 97 and 97), whereby the protective lid member 110 is locked to the protected portion. Therefore, according to the electrical junction box 1 of this structure, the workability | operativity of the operation | work which assembles the protective cover member 110 to a to-be-protected part can be improved.
Further, with respect to the electrical junction box 1, the junction box body 2 is fixed to a mounting surface AS that extends in a direction intersecting the extending direction HP of the vehicle chassis and faces downward of the vehicle body panel VBP of the vehicle. As a result, the protective cover member 110 is attached to the protected portion in a state where the protected portion of the electrical component mounting surface 5 and the temporary placement concave portion (bus bar temporary placement concave portion 80) are also arranged to face downward. It is relatively easy to protect the protective lid member 110 even when the electric connection box 1 is attached in a manner that makes it difficult for an operator to visually observe the protected portion and it is difficult to normally attach the protective lid member 110 to the protected portion. Can be assembled to the part.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

It is a figure which shows one Embodiment of the electrical junction box which concerns on this invention, Comprising: It is a top view of the junction box main body which shows the electrical component mounting surface of an electrical junction box, and a terminal with an electric wire. It is a disassembled perspective view which shows the state before attaching a bus-bar and a current sensor to a current detection part. It is a top view of the current detection part which shows the direction which inserts a bus bar in the current detection part in which the current sensor was incorporated. It is a top view of the electric current detection part of the state in which the bus bar was mounted on the bottom face of a bus-bar temporary placement recessed part. When the bus bar is slid along the bus bar insertion path from the state shown in FIG. 4 toward the through hole of the current sensor, passes through the through hole, and the second end is in contact with the contact wall, the current detection unit More specifically, the movement of the bus bar in the width direction is restricted by both walls forming the bus bar insertion path of each of the first contact piece receiving recess and the second contact piece receiving recess, and the bus bar The first screw hole on the first end is aligned with the first screw insertion hole on the first contact piece, and the second screw hole on the second end of the bus bar is the second screw on the second contact piece. It is a top view of the electric current detection part of the state aligned with the screw insertion hole. The state of the current detection unit when the bus bar is slid on the bottom surface of the bus bar temporary placement recess toward the through hole of the current sensor with the first end thereof in the forward direction of sliding is shown in more detail. FIG. 6 is a top view of the current detection unit in a state where the first end portion of the bus bar is in contact with the bus bar erroneous insertion prevention unit and is prevented from entering the bus bar insertion path. FIG. 5 is a left side view of the junction box body fixed to a mounting surface that extends in a direction crossing the extending direction of the vehicle chassis and faces obliquely below the vehicle body panel of the vehicle. It is the perspective view which looked at the protective cover member which can be latched to the to-be-protected part of an electric current detection part from diagonally downward. After the slide plate portion of the protective cover member is temporarily placed on the bottom surface of the bus bar temporary placement recess of the current detection unit in the state of FIG. 7, the sliding direction on the bottom surface of the bus bar temporary placement recess is determined as the bus bar temporary placement. It is a perspective view which shows a mode that a bus-bar slide path | route is slid and moved toward the 1st contact piece accommodation recessed part (namely, the arrow SD direction), being controlled by the both sides | surfaces of a recessed part. It is the perspective view which looked at the state similar to FIG. 9 changing the angle. The slide movement of the protective cover member proceeds from the state of FIG. 9, and the first engagement protrusion of the protective cover member comes into contact with the first engagement protrusion of the first contact piece housing recess to prevent the slide movement. It is a perspective view which shows a mode. As shown in FIG. 11, in a state where the first locking projections of the protective lid member are hooked on the first engagement projections of the first contact piece receiving recess, the protective lid member is used with the hooked portions as fulcrums (ie, center points). It is a perspective view which shows a mode that it rotates so that a rotation locus | trajectory may be drawn in the arrow R direction. The rotation of the protective lid member advances from the state of FIG. 12, the second locking projection of the protective lid member engages with the second engaging projection of the terminal holding portion, and the third locking projection of the protective lid member is the second. It is a side view which shows typically a mode that it engaged with the 3rd engagement protrusion of the contact piece accommodation recessed part, and, thereby, the protective cover member was latched by the electric current detection part. It is a left view of the electrical junction box of a prior art example. It is a perspective view which fractures | ruptures and shows an electric current detection part from the junction box main body of the electrical junction box of a prior art example. It is a perspective view of the protective cover member of the electrical junction box of a prior art example. It is a left view of the connection box main body of the prior art example of the state fixed to the to-be-attached surface which extends in the direction which cross | intersects the extension direction of the chassis of a vehicle, and faces the downward direction of the vehicle body panel of this vehicle.

Explanation of symbols

1: Electrical junction box 2: Junction box body 10: Current detector 20: First contact piece receiving recess 21: Both walls 26: Outer surface 27: First engagement protrusion 31: First screw insertion hole 32: First contact Piece 40: Second contact piece accommodating recess 41: Both walls 45: Abutting wall 51: Second screw insertion hole 52: Second contact piece 70: Bus bar 72: First end 73: First screw fixing hole 74 : Second end 75: second screwing hole 80: bus bar temporary placement recess 81: bus bar slide path 82: bottom bar 85: bus bar insertion path 95: wall 97: second engagement protrusion 110: protective lid member 111: Lid 113: 1st side wall 117: 1st latching protrusion 118: Slide board part 123: 2nd side wall 127: 2nd latching protrusion 180: Current sensor 182: Through-hole

Claims (2)

The junction box body,
An electrical component mounting surface provided as an upper surface of the junction box body, and a plurality of electrical components mounted thereon;
A protected portion provided on the electrical component mounting surface;
A first wall forming one of the longitudinal ends of the protected portion;
A first engagement portion formed on the outer surface of the first wall;
A second wall forming the other of the longitudinal ends of the protected portion;
A second engagement portion formed on the outer surface of the second wall;
A protective lid member attachable to the protected portion;
A lid portion formed on the protective lid member so as to cover the upper surface of the protected portion when the protective lid member is attached to the protected portion;
A first side wall extending downward from one of both ends in the longitudinal direction of the lid,
A first locking portion formed on the inner surface of the first side wall;
A slide plate portion formed on the first side wall so as to be juxtaposed with the first locking portion;
A second side wall extending downward from the other of the longitudinal ends of the lid,
A second locking portion formed on the inner surface of the second side wall;
The slide plate portion of the protection cover member has a bottom surface slidably connected to the first wall so as to extend in the longitudinal direction of the protected portion to the outer surface of the first wall and the slide plate portion. A temporary placement recess that regulates the sliding direction on the bottom surface in the longitudinal direction of the protected part to form a slide path of the slide plate part;
With
The protective cover member in which the slide plate portion is temporarily placed on the bottom surface of the temporary placement recess with the second side wall facing the protected portion side is directed toward the first wall along the slide path. The sliding movement of the protective cover member is prevented by slidingly moving on the bottom surface of the temporary placement recess, so that the first engaging portion of the protective lid member is caught by the first engaging portion of the first wall. The protective lid member is rotated toward the protected portion with the hook portion between the first locking portion and the first engaging portion as a fulcrum, and the second locking portion is the second engaging portion. The electrical connection box, wherein the protective lid member is locked to the protected portion. The junction box body is fixed to the vehicle such that the electrical component mounting surface faces downward;
2. The protective cover member is attached to the protected part in a state where the protected part and the temporary storage recess of the electrical component mounting surface are arranged so as to face downward. Electrical junction box.

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