JP2011223692A - Electrical connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connection box of a novel structure in which it is allowed to obtain a rigidity or strength with respect to a bolt fastening force applied upon a block member while a split structure is maintained in which the block member is combined to a base member mounted to a supporting member, and in which it is allowed to easily align the block member to the base member and to lock and fix the block member with a plurality of lock parts.SOLUTION: Between a center portion of a base member 14 inwardly separated from an outer circumferential edge 30 and an outer circumferential edge 68 of a block member 16 positioned there, there are provided guide mechanisms 46a, 46b, 72a, 72b each of which has, by a mortise-tenon joint, a rail structure extending toward an assembly direction of the block member 16a. The block member 16 is guided to a lock fixing position in the assembly direction by the guide mechanisms 46a, 46b, 72a, 72b.

Description

  The present invention relates to an electrical junction box mounted on an automobile or the like, and more particularly, to an electrical junction box in which a box body has a divided structure.

  Conventionally, in an automobile or the like, an electric junction box has been used for the purpose of improving the efficiency of electric wiring and improving maintainability. Such electrical junction boxes are equipped with electrical components such as fuses and relays, relay connectors are attached, bus bars for energization are assembled, and external electric wires for input and output are connected. An energization circuit is formed inside the junction box.

  By the way, in recent years, for the purpose of further improving the efficiency of the internal energization circuit by incorporating bus bars and electrical components inside the electrical junction box, and facilitating the installation work of connection bolts for connecting external wires, etc. An electric junction box having a divided structure has been proposed. For example, as disclosed in Japanese Patent Application Laid-Open No. 2005-253160 (Patent Document 1), such an electrical junction box has an electrical component such as a bus bar or a fuse with respect to a base member attached to a support member such as a vehicle body. The block member to be mounted is formed as a separate body, and a divided structure is formed by combining these two members.

  However, the conventional divided electrical junction box has a problem that it is difficult to obtain sufficient rigidity and strength. That is, in the electrical junction box having the base member and block member divided structure as described above, an external electric wire is connected to the block member, but the tightening force of the connecting bolt is applied to the joint portion of the block member and the base member. There is a risk of damage due to action.

  Moreover, in the conventional electric junction box having a divided structure, there is a problem that the work of aligning and assembling the block member with respect to the base member is difficult and troublesome. That is, in order to assemble the block member to the base member, in order to detach both members in a detachable and quick manner, as described in Patent Document 1, generally, the block member is locked and fixed by a plurality of lock portions. Is done by. However, since the block member has a complicated uneven shape due to attachment parts of various electric parts, connection bolts of external electric wires, etc., the visibility of the plurality of lock parts is poor, and the plurality of lock parts are positioned simultaneously. The assembly work is difficult.

JP-A-2005-253160

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is (1) a divided structure in which a block member in which an electrical component is mounted is combined with a base member attached to a support member. While maintaining (2) sufficient rigidity and strength against external force such as the tightening force of the connecting bolt exerted on the block member can be obtained, and (3) the block member can be easily positioned with respect to the base member Another object of the present invention is to provide an electrical junction box having a novel structure that can be locked and fixed by a plurality of lock portions.

  A first aspect of the present invention is an electric junction box having a divided structure in which a block member on which an electrical component is mounted is formed separately from a base member attached to a support member, and the two members are combined. A lock mechanism that locks and fixes the block member to the base member by overlapping the block member in the assembly direction with respect to the base member is provided at a plurality of locations on the outer peripheral edge of the block member, and the outer peripheral edge of the base member Guide of rail structure by concave-convex fitting extending in the assembly direction of the block member with respect to the base member between a central portion spaced inward from the outer peripheral edge portion of the block member positioned there A mechanism is provided, and the block member is guided in the assembling direction relative to the base member by the guide mechanism. Tsu that it has to be guided to the click fixed position, characterized.

  According to the electrical junction box having the structure according to the present invention, the block member is guided in the assembly direction with respect to the base member by the guide mechanism, and the lock mechanism is positioned and locked. Therefore, the difficult operation of positioning the block member while observing all the lock mechanisms at the same time is unnecessary, and if the block member and the base member are positioned relative to each other only by viewing only the guide mechanism, the guide is thereafter used. The lock mechanism can be accurately positioned based on the guide action of the mechanism, and the assembly work can be performed easily and reliably.

  In addition, since the guide mechanism located at the center portion of the base member has a rail structure with concave and convex fitting extending in the assembly direction, it has a large resistance to relative displacement of the block member in the circumferential direction with respect to the base member. Force and positioning force can be exerted. As a result, it is possible to reinforce the fixing strength by the lock mechanism and the connection rigidity between the block member and the base member, and to obtain sufficient rigidity and strength against external force such as tightening force of the connection bolt exerted on the block member. I can do it.

  According to a second aspect of the present invention, in the one described in the first aspect, the block member has an isosceles trapezoidal outer shape, and at least one is provided on each of both sides sandwiching the central portion of the upper base. While the locking mechanism is provided, the guide mechanism is provided in the center portion of the lower bottom part that is longer than a pair of opposite sides, and the locking mechanisms are provided on both sides of the lower bottom part with the guide mechanism interposed therebetween. It is what has been.

  According to this aspect, since the block member is locked and fixed to the base member at the four corners or positions close thereto, the fixed state of the block member to the base member can be maintained more stably. In addition, the both sides of the center portion of the upper bottom portion in this aspect may be both end portions of the upper bottom portion, the upper bottom side of the opposite side portions, or the like. Then, by using the longest bottom bottom of the isosceles trapezoidal block member, the guide mechanism can be disposed at the center and the lock mechanisms can be disposed at both ends. Thereby, the visibility of the guide mechanism when the base member and the block member are assembled can be improved, and the efficiency of the assembling work and the positioning stability of the lock mechanism can be further improved.

  In addition, even after the base member and the block member are fixed, the guide mechanism provided in the central portion of the lower bottom portion is provided on both sides with respect to the load applied between the base member and the block member due to the attachment of the electrical components. Since the lower bottom portion is stably fixed to the base member by the lock mechanism, the connection strength between the base member and the block member can be more stably exhibited.

  According to a third aspect of the present invention, in the one described in the second aspect, the base member has a triangular shape toward the outer peripheral side at one long side portion with respect to a rectangular base portion having a long rectangular shape. A triangular protruding portion protruding at the outer peripheral surface of the other long side portion of the rectangular base portion, and an attachment portion fixed to the support member is formed on the rectangular base portion. The lower bottom portion of the block member is overlapped with the one long side portion of the portion, and the pair of opposite sides of the block member with respect to the pair of opposite side portions of the triangular protruding portion of the base member The parts are overlapped, and the block member is assembled to the base member in an accommodated state.

  In this aspect, since the triangular protrusion is formed on the base member, the size can be reduced as compared with the conventional rectangular electric junction box. As a result, for example, it is possible to arrange in a triangular space, and it is possible to secure a space for disposing other members around the triangular protrusion. In the space-saving electrical junction box as in this aspect, the arrangement of the mounting parts for the electrical components and the connection bolts for the external wiring becomes complicated, and the visibility of the plurality of lock mechanisms in the divided structure may be deteriorated. However, by using the guide mechanism of the present invention, it is possible to easily and stably align the lock mechanism.

  According to a fourth aspect of the present invention, there is provided the guide mechanism according to any one of the first to third aspects, wherein a pair of the guide mechanisms are provided facing each other on both sides of the block member. In this way, the block member is sandwiched by the guide mechanism, and the fixing force due to the concave and convex engagement of the guide mechanism is exhibited on both sides of the block member, thereby further stabilizing the circumferential displacement of the block member with respect to the base member. Resistance and positioning force can be demonstrated.

  According to the present invention, in an electric junction box having a divided structure in which the base member and the block member are combined, the base member and the block member are fixed to each other by the lock mechanism, and the assembly direction is provided between the base member and the block member. The guide mechanism of the rail structure by the uneven | corrugated fitting extended in is provided. Accordingly, the block member can be easily positioned with respect to the base member by the guide mechanism and can be fixed by the lock mechanism, and the fixing strength of the lock mechanism can be reinforced by the concave and convex fitting of the guide mechanism. Sufficient rigidity and strength can be obtained with respect to external force due to mounting or the like.

The bottom view of the electrical junction box as one embodiment of the present invention. The disassembled perspective view of the case main body which comprises the electrical-connection box shown in FIG. The bottom view of the base member which comprises the case main body shown in FIG. IV-IV sectional drawing in FIG. The bottom view of the block member which comprises the case main body shown in FIG. The side view of the block member shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIG. 1 shows an electrical junction box 10 as an embodiment of the present invention, and FIG. 2 shows a case main body 12 constituting the electrical junction box 10. FIG. 1 is a bottom view of the electrical junction box 10, and FIG. As shown in FIG. 2, the case main body 12 is a divided structure formed by fitting a block member 16 formed separately from the base member 14 into the base member 14.

  3 and 4 show the base member 14. The base member 14 is made of synthetic resin, and has a rectangular base portion 18 having a substantially long rectangular shape, and a triangular protrusion protruding from the one long side portion 20a of the rectangular base portion 18 to the outer peripheral side of the base member 14 in a triangular shape. As a whole, a block shape having a substantially pentagonal shape is formed.

  The triangular protrusion 22 has a pair of diagonal sides 24a and 24b corresponding to the triangular hypotenuse, and a tip 26 connected to the apex of the triangle to which the pair of hypotenuses 24a and 24b are connected. The pair of oblique sides 24 a and 24 b extend from both ends of one long side 20 a of the rectangular base portion 18, and gradually approach evenly as they protrude from the rectangular base portion 18. Thereby, the triangular protrusion part 22 in this embodiment is made into the substantially right-angled isosceles triangle shape where the oblique side parts 24a and 24b cross | intersect substantially perpendicularly.

  A base outer peripheral wall 30 protruding in the fitting direction of the block member 16 (vertical direction in FIG. 4) is formed on the outer peripheral edge of the bottom plate 28 in the base member 14 over substantially the entire circumference. A pair of attachment portions 34, 34 are formed on the outer peripheral surface 32 of the base outer peripheral wall 30 in the long side portion 20b, and these attachment portions 34, 34 serve as a support member such as a vehicle body panel provided on the vehicle body. A base member 14 is attached.

  Further, in the base member 14, intermediate portions of the oblique sides 24a and 24b are respectively formed with notches 36 that are concave and open to the outer periphery as the base outer peripheral wall 30 and the bottom plate 28 are notched. As a result, the base outer peripheral wall 30 is notched at the notch 36 and is discontinuous in the circumferential direction of the base member 14.

  Further, a terminal accommodating portion 38 a is provided at a substantially central portion of the rectangular base portion 18. The terminal accommodating portion 38a accommodates a terminal of a multi-fusible link (not shown) as an electrical component and a connection terminal of an electric wire connected to the terminal. The terminal accommodating portion 38a has a substantially rectangular block shape and is fitted to the block member 16 from the bottom plate 28. Projected in the direction. The terminal accommodating portion 38a has a longitudinal shape corresponding to the shape of the multi-fusible link having a longitudinal shape. And the terminal accommodating part 38a is formed so that a longitudinal direction may follow the extending direction of the long side part 20b so that a multi-fusible link may be mounted | worn with the longitudinal direction along the extending direction of the long side part 20b. Has been.

  Further, a terminal accommodating portion 38b is provided at one end in the length direction of the rectangular base portion 18. The terminal accommodating portion 38b accommodates a fuse terminal (not shown) as an electrical component and a connection terminal of an electric wire connected thereto, and has a substantially rectangular block shape and protrudes from the bottom plate 28 in the fitting direction of the block member 16. Is formed. The terminal accommodating portion 38b is attached so that two fuses are arranged in a direction (vertical direction in FIG. 3) perpendicular to the extending direction of the long side portion 20b.

  On the other hand, a terminal accommodating portion 38 c is provided at the distal end portion 26 of the triangular protruding portion 22. The terminal accommodating portion 38c accommodates a relay terminal (not shown) as an electrical component and a connection terminal for an electric wire connected thereto, and has a substantially rectangular block shape and protrudes from the bottom plate 28 in the fitting direction of the block member 16. Is formed. The terminal accommodating portion 38c is formed to be inclined with respect to the extending direction of the long side portion 20b so that the diagonal line is along the extending direction of the inclined side portions 24a and 24b. Thus, the relay having a rectangular block shape is mounted so that one of the apexes of the relay is aligned with the apex of the triangular protrusion 22 along the two adjacent surfaces along the extending direction of the oblique sides 24a and 24b. It is like that.

  Further, the base member 14 is formed with base side engaging claws 40a to 40d as locking mechanisms at a plurality of circumferential positions (four positions in the present embodiment) surrounding the block member 16 when the block member 16 is fitted. Has been. The base side engaging claw 40a is formed on the outer surface of the relay terminal accommodating portion 38c. The base side engaging claw 40 b is formed on the inner surface 42 of the base outer peripheral wall 30 at the distal end portion 26. Further, the base side engaging claws 40c are formed on a connecting wall 44 that protrudes from the bottom plate 28 in the base member 14 inside the terminal housing portion 38a for the multi-fusible link. Furthermore, the base side engaging claw 40d is formed at the end on the opposite side to the base side engaging claw 40c on the inner surface 42 of the base outer peripheral wall 30 in the long side portion 20b.

  The base side engaging claws 40a to 40d are spaced apart from each other by a substantially equal distance from the bottom plate 28 in the fitting direction of the block member 16, and the height direction of the base outer peripheral wall 30 in the fitting direction of the block member 16 It is located in the approximate middle part.

  Further, the base member 14 is formed with a pair of fitting ridges 46a and 46b as a guide mechanism at a position where the substantially central portion of the block member 16 is sandwiched between both sides when the block member 16 is fitted. These fitting protrusions 46a and 46b have a rail shape extending in the assembly direction of the block member 16 (vertical direction in FIG. 4) with a substantially T-shaped cross section. Further, the fitting ridges 46a and 46b are tapered so that the width dimension (the dimension in the left-right direction in FIG. 4) decreases as the distance from the bottom plate 28 increases in the assembly direction of the block member 16. Further, the distal end edges 48, 48 of the fitting protrusions 46a, 46b have the same distance from the bottom plate 28 in the assembly direction of the block member 16, and the bottom plate is more than the base side engaging claws 40a-40d. It is located away from 28.

  One fitting protrusion 46a is connected to the terminal accommodating portion 38a by the connecting wall 44, and is a central portion spaced inward from the base outer peripheral wall 30 in the base member 14 and a long side on the long side portion 20a. It is located at a substantially central portion in the extending direction of the portion 20a. A through hole 52 that penetrates the bottom plate 28 is formed in the central portion of the base member 14, and the fitting protrusion 46 a is supported by the connecting wall 44 and positioned on the through hole 52.

  On the other hand, the fitting protrusion 46b is connected to the terminal accommodating portion 38c by a connecting wall 53 protruding inward of the base member 14 from the relay terminal accommodating portion 38c. It is located in the substantially central part in the extending direction of the long side part 20b in the central part separated in the direction. The fitting protrusion 46b is located in a portion where the through hole 52 is not formed in the bottom plate 28, and is connected to the connecting wall 53 and is formed so as to protrude from the bottom plate 28.

  Thereby, the fitting ridge 46a is positioned on the long side portion 20b side, the fitting ridge 46b is positioned on the distal end portion 26 side, and the extension of the long side portion 20b is performed at a substantially intermediate portion in the extending direction of the long side portion 20b. Opposite positions are separated by a predetermined distance in a direction orthogonal to the outgoing direction.

  The block member 16 is fitted into the center portion of the base member 14 from vertically below (upward in FIG. 2). 5 and 6 show the block member 16. The block member 16 is formed of a synthetic resin and has a substantially isosceles trapezoidal shape as a whole. Both end portions of the upper base portion 54 corresponding to the upper base of the trapezoid and both end portions of the lower bottom portion 56 corresponding to the lower base are trapezoidal. It is made into the shape respectively connected by the oblique side parts 58a and 58b as a pair of opposite side part which hits two sides which are not parallel. Note that the upper bottom portion 54 in the present embodiment is formed to be recessed inward of the block member 16 in order to avoid interference with the relay terminal accommodating portion 38 c in the base member 14. In addition, a rectangular protrusion 60 that protrudes outward of the block member 16 is formed at one end of the lower bottom part 56 perpendicular to the extending direction of the lower bottom part 56. Note that the length of the upper bottom portion 54, the lower bottom portion 56, and the oblique sides 58a and 58b is the maximum at the lower bottom portion 56.

  In each of the oblique sides 58a and 58b, an inwardly projecting wall portion 62 is formed at a substantially central portion corresponding to the notch portion 36 when fitted to the base member 14. The inward protruding wall portion 62 has a protruding wall shape that swells from the outer peripheral end of the block member 16 toward the inner peripheral side and protrudes downward (upward in FIG. 6). Thereby, an electric wire housing portion 64 extending downward from the block member 16 is formed on the outer surface of the inwardly projecting wall portion 62 with a hook shape opening on the outer peripheral side of the block member 16.

  In addition, a connection bolt mounting portion 66 is provided at a position where the inward projecting wall portion 62 is formed in the oblique sides 58a and 58b. Although a detailed illustration is omitted, a connection plate made of a thick metal plate is mounted on the upper surface (lower side in FIG. 6) of the block member 16, and a part of the connection plate is a connection bolt. It is adapted to be superimposed on the mounting portion 66. In the present embodiment, two connecting bolt mounting portions 66 are provided on the oblique side portion 58a, while one connecting bolt mounting portion 66 is provided on the oblique side portion 58b.

  And on the outer peripheral surface 68 which comprises the outer periphery part of the block member 16, the block side engaging claws 70a-70d as a locking mechanism are formed in several places (4 places in this embodiment) of the circumferential direction. Yes. These block side engaging claws 70a to 70d are formed at positions corresponding to the base side engaging claws 40a to 40d, respectively. The block-side engagement claw 70a is formed at the end of the upper bottom 54 on the oblique side 58a side. The block side engaging claw 70b is formed at the end portion on the upper bottom portion 54 side in the oblique side portion 58b. Thereby, the block side engaging claws 70a and 70b are formed on both sides sandwiching the central portion of the upper bottom portion 54. Further, the block-side engaging claw 70 c is formed on the lower bottom portion 56 on the opposite side of the rectangular protruding portion 60 across the central portion of the lower bottom portion 56. On the other hand, the block side engaging claw 70 d is formed on the rectangular protrusion 60 in the lower bottom portion 56. Thereby, the block side engaging claws 70 c and 70 d are formed on both sides sandwiching the central portion of the lower bottom portion 56. The positions of the block side engaging claws 70a to 70d in the assembly direction of the block member 16 (vertical direction in FIG. 6) are substantially equal, and the thickness direction of the outer peripheral surface 68 (in FIG. 6). , In the vertical direction).

  Further, on the outer peripheral surface 68, a pair of fitting recesses 72 a and 72 b as guide mechanisms are opposed to both sides of the central portion of the block member 16 at the central portion of the upper bottom portion 54 and the central portion of the lower bottom portion 56. Each is formed. These fitting recesses 72a and 72b have a rail shape extending in the assembly direction of the block member 16 with a substantially T-shaped cross-sectional shape corresponding to the fitting projections 46a and 46b. The fitting recesses 72 a and 72 b are formed on the outer peripheral surface 68 over the entire length of the block member 16 in the assembly direction.

  Such a block member 16 is fitted into a central portion of the base member 14 sandwiched between the fusible link terminal accommodating portion 38a and the relay terminal accommodating portion 38c. At the time of fitting, first, the fitting recesses 72a and 72b of the block member 16 are fitted with the fitting protrusions 46a and 46b of the base member 14, respectively. By fitting the fitting protrusions 46a, 46b and the fitting recesses 72a, 72b, the block member 16 is positioned with respect to the base member 14 and guided in the direction of assembling to the base member 14. Then, according to the guiding action of the fitting protrusions 46a, 46b and the fitting recesses 72a, 72b, the block member 16 is brought close to the base member 14 in the assembling direction and overlapped, thereby causing the base side engaging claws 40a to overlap. To 40d and the block side engaging claws 70a to 70d are respectively engaged. As a result, the lower bottom portion 56 of the block member 16 is superimposed on the long side portion 20a of the rectangular base portion 18 of the base member 14, and the oblique sides of the block member 16 are formed on the oblique sides 24a and 24b of the triangular protrusion 22 of the base member 14. The case body 12 is formed by locking the block member 16 in the accommodated state in the base member 14 where the portions 58a and 58b are overlapped.

  In the assembled state of the base member 14 and the block member 16, the opening of the notch portion 36 in the base member 14 is covered with the inwardly projecting wall portion 62 of the block member 16. Thereby, the outer peripheral wall 74 of the case main body 12 is continuously formed over the entire circumference of the case main body 12 by the base outer peripheral wall 30 of the base member 14 and the inward protruding wall portion 62 of the block member 16. ing.

  The connection plate provided on the upper surface of the block member 16 through the through hole 52 of the base member 14 is exposed above the case body 12, and the connection plate has an exposed portion above the case body 12. A MIDI fuse as an electric component (not shown) is bolted. The connection bolt mounting portion 66 of the block member 16 has a connection terminal as an electrical component provided at the end of an electric wire (not shown) connected to the battery or alternator fixed to the connection plate and electrically connected to the connection plate. An electric wire attached to the mounting portion 66 is disposed in the electric wire housing portion 64.

  The terminals of the multi-fusible link, the relay, and the fuse are inserted and attached to the terminal accommodating portions 38 a to 38 c formed on the base member 14 from above the case body 12, respectively. Further, a crimp terminal or connector provided at the end of the external wiring is inserted from below the terminal accommodating portions 38a to 38c, and connected to the terminals of the multi-fusible link, relay and fuse and the terminal accommodating portions 38a to 38c, respectively. Is done. And the electrical connection box 10 is comprised by assembling the cover member which is not shown in figure on the upper and lower sides of the case main body 12, respectively.

  In the electrical junction box 10 having such a structure, when the block member 16 is assembled to the base member 14, the base side engaging claws 40 a to 40 d and the block side engaging claws 70 a to 70 d are connected to the base outer periphery of the base member 14. There is a case where it is difficult to visually recognize because it is hidden behind the wall 30 or the terminal accommodating portions 38a to 38c. However, in this embodiment, the block members 16 are assembled in a positioning state with respect to the base member 14 by fitting the fitting protrusions 46a and 46b of the base member 14 with the fitting recesses 72a and 72b of the block member 16. It can be moved in the attaching direction. Thereby, it is possible to easily align and engage the base side engaging claws 40a to 40d and the block side engaging claws 70a to 70d without visually recognizing all their positions. Can be easily and reliably performed.

  In particular, the front edge portions 48, 48 of the fitting protrusions 46a, 46b are positioned closer to the block member 16 than the base-side engagement claws 40a-40d, and the fitting grooves 72a, 72b are located in the block member 16. By being formed over the entire length in the assembling direction, the guiding action of the fitting protrusions 46a and 46b and the fitting recesses 72a and 72b can be achieved by the base side engaging claws 40a to 40d and the block side engaging claws 70a. It can be expressed from the initial assembly stage before the engagement of ˜70d is started, and the block member 16 can be stably guided in the assembly direction from the initial assembly stage to the completion of the assembly. . Moreover, since the fitting ridges 46a and 46b are formed in the center part of the base member 14, the position of the fitting ridges 46a and 46b can be easily recognized.

  Further, electrical parts into which terminals are inserted and fixed, such as fusible links and relays, are attached to the base member 14, while bolts are fixed, such as electric connection terminals and MIDI fuses. The electrical component is attached to the block member 16. Therefore, it is avoided that the screw tightening stress applied to the bolt is directly applied to the base member 14, and the possibility of deformation or damage of the case body 12 due to the screw tightening stress is reduced. In particular, since the outer peripheral surface of the block member 16 has a polygonal shape and is assembled to the base member 14, when the rotational force accompanying screw tightening is exerted on the block member 16, the outer peripheral surface of the block member 16 has a plurality of locations. Thus, the rotation reaction force exerted on the base member 14 from the base member 14 to the block member 16 is distributed to the plurality of contact locations. As a result, the stress acting on the base member 14 and the block member 16 is distributed, and the strength of the block member 16 against screwing is more effectively ensured.

  When the block member 16 is about to be displaced with respect to the base member 14 in the circumferential direction due to a rotational force accompanying screw tightening, the fitting protrusions 46a and 46b and the fitting recesses having a T-shaped cross section are formed. The relative displacement amount of the block member 16 with respect to the base member 14 is limited by the concave / convex fitting with 72a, 72b, and the engagement state of the base side engaging claws 40a to 40d and the block side engaging claws 70a to 70d is further strengthened. Can be maintained. In particular, in the present embodiment, the engaging protrusions 46a, 46b and the engaging recesses 72a, 72b are all the central portions of the upper bottom portion 54 and the lower bottom portion 56, and the engaging claws 40a, 70a and the engaging claws 40b, 70b. , And between the engaging claws 40c and 70c and the engaging claws 40b and 70b, respectively, thereby engaging the engaging claws 40a to 40d and 70a to 70d with the engaging ridges 46a and 46b. And the concave and convex fitting of the fitting concave stripes 72a and 72b can be effectively reinforced. Further, by using the lower bottom portion 56 having the largest length dimension, the fitting recess 72a is disposed at the center portion, and the block side engagement claws 70c and 70d are disposed at the end portions, thereby enabling more effective fixing force and visibility. Is improved. Furthermore, by providing the fitting protrusions 46a and 46b and the fitting recesses 72a and 72b on both sides sandwiching the central portion of the block member 16, a stronger fixing force and positioning against the circumferential displacement of the block member 16 are provided. It is also possible to obtain stability.

  As mentioned above, although one Embodiment of this invention was described, this is an illustration to the last, Comprising: This invention is not limited at all by the specific description in the said embodiment. For example, various shapes can be appropriately adopted as the specific shape of the guide mechanism, and the guide mechanism may be configured by a ridge and a groove extending with an L-shaped cross section. Further, the number of guide mechanisms is not limited, and only one guide mechanism may be provided, or three or more guide mechanisms may be provided.

  Moreover, in the said embodiment, the fitting protrusion 46a, 46b is formed in the base member 14 among the fitting protrusion 46a, 46b and the fitting recessed stripes 70a, 70b which comprise a guide mechanism, Therefore A relay Although the strength of the base member 14 required to have strength against insertion of electric parts such as the above has been ensured, for example, fitting recesses 70a and 70b are formed on the base member 14 and the fitting protrusion on the block member 16 is formed. It is also possible to form the strips 46a and 46b.

  Furthermore, the specific shapes of the base member and the block member in the above embodiment are merely examples, and the base member and the block member may have a substantially rectangular shape or other polygonal shape.

10: Electrical junction box, 12: Case body, 14: Base member, 16: Block member, 18: Rectangular base part, 20a, b: Long side part, 22: Triangular protrusion part, 24a, b: Oblique side part (triangular protrusion) 30: base outer peripheral wall (outer peripheral edge portion of base member), 32: outer peripheral surface, 34: mounting portion, 40a to d: base side engaging claws (lock mechanism), 46a, b: Fitting ridge (guide mechanism), 54: upper bottom portion, 56: lower bottom portion, 58a, b: oblique side portions (a pair of opposite side portions of the block member), 68: outer peripheral surface (outer peripheral edge portion of the block member), 70a to d: Block side engaging claw (locking mechanism), 72a, b: fitting groove (guide mechanism)

Claims (4)

In the electric junction box of the divided structure in which the block member mounted with the electrical component is separately formed with respect to the base member attached to the support member, and both the members are combined.
A lock mechanism that locks and fixes the block member to the base member by overlapping the block member with the base member in the assembly direction is provided at a plurality of locations on the outer peripheral edge of the block member, and the outer peripheral edge of the base member Between the central portion spaced inward from the portion and the outer peripheral edge portion of the block member located there, and a rail structure with a concavo-convex fitting extending toward the assembly direction of the block member with respect to the base member An electrical junction box provided with a guide mechanism, wherein the block member is guided in the assembling direction with respect to the base member by the guide mechanism and guided to a lock fixing position by the lock mechanism.   The block member has an isosceles trapezoidal outer shape, and at least one locking mechanism is provided on each of both sides of the center portion of the upper bottom portion, while the lower bottom portion is longer than a pair of opposite sides. The electrical junction box according to claim 1, wherein the guide mechanism is provided in a central portion, and the lock mechanisms are provided on both sides of the lower bottom portion with the guide mechanism interposed therebetween.   The base member is formed with a triangular protruding portion that protrudes in a triangular shape toward the outer peripheral side on one long side portion of the rectangular base portion having a long rectangular shape, and the other of the rectangular base portions An attachment portion fixed to the support member is formed on the outer peripheral surface of the long side portion, while the lower bottom portion of the block member is opposed to the one long side portion of the rectangular base portion in the base member And the pair of opposite side portions of the block member are overlapped with the pair of opposite side portions of the triangular projecting portion of the base member, and the block member is accommodated with respect to the base member. The electrical junction box according to claim 2, which is assembled.   The electrical junction box according to any one of claims 1 to 3, wherein a pair of the guide mechanisms are provided facing each other on both sides of the block member.

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