JP2014193002A - Electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connection box of novel structure in which a mounting body is mounted on the electric connection box body by rotary operation for connector connection, and the problems of interference with other member, damage, and the like, are reduced without causing up-sizing of the electric connection box itself.SOLUTION: An electric connection box is provided with a lock mechanism consisting of a lock protrusion 80 and an insertion hole 38 which allow rotation of a mounting body 14 about one side edge corner 82a in the mounting body 14 on the superposition surface 77 side, in a state where the one side edge corner 82a is in contact with the bottom 28 of a mounting recess 22 in an electric connection box body 12, and are not engaged in the state of starting rotation of the mounting body 14, but are engaged in the state of completing rotation of the mounting body 14.

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 separate attachment body such as a control device is assembled to a main body of the electrical junction box by a turning operation and connected to a connector. It is.

  In an electrical junction box mounted on an automobile or the like, for example, a wiring board on which electronic components are mounted, an insulating board on which bus bars are mounted, and the like are accommodated. As one type, an electronic control unit such as an ECU that houses a control circuit is used as a separate mounting body, and the mounting body is detachable from the electrical junction box body. For example, those described in Japanese Patent Application Laid-Open No. 2008-172889 (Patent Document 1). According to such an electrical junction box, there is an advantage that the electronic control unit can be easily replaced or changed by making the electronic control unit a separate structure.

  By the way, in the electrical junction box composed of the assembly structure of the electrical junction box main body and the mounting body, the corresponding positions of the mounting recess of the electrical junction box main body and the overlapping surface of the mounting body superimposed thereon Is provided with a connector. And, when the attachment body is assembled to the electrical junction box body, the electrical circuit provided in the electrical junction box body and the electrical circuit provided in the attachment body are connected to each other by connecting a connector. . Then, by rotating the mounting body with respect to the electrical junction box body, it is proposed that the assembly of the mounting body to the electrical junction box body and the connection of the connectors provided to each are easily performed in one operation. ing.

  Specifically, as shown in Patent Document 1, while a pair of rotating shafts project from both end portions of one side edge corner of the mounting body, the corresponding portion of the mounting recess of the electrical junction box body Provides a bearing portion that accommodates a pair of rotating shafts, and inserts and supports the rotating shaft in the bearing portion, thereby stably realizing rotation of the mounting body with respect to the electric junction box body by the rotating shaft. Thus, the attachment body is superposed on the electric junction box so that the respective connectors are connected to each other.

  However, in the electrical junction box having such a conventional structure, it is necessary to project the rotating shaft on the mounting body, and it is also necessary to provide a bearing portion for accommodating the rotating shaft in the electrical junction box body. There was a problem that enlargement was inevitable. In addition, since the rotary shaft protrudes greatly outward from the attachment body, there is a problem that the rotary shaft interferes with other members and is easily damaged during the assembling work. In addition, in order to prevent the rotary shaft from being detached from the bearing portion, it is necessary to project a regulating piece that protrudes in a cantilevered manner from the top to the bottom. There is also a risk that the shaped restriction piece is easily damaged by contact with the rotating shaft.

JP 2008-172889 A

  The present invention has been made in the background of the above-described circumstances, and the problem to be solved is that in an electrical connection box in which a mounting body is assembled to a main body of an electrical connection box by a turning operation and connected by a connector. An object of the present invention is to provide an electrical junction box having a novel structure in which problems such as interference with other members and breakage are reduced without increasing the size of the junction box itself.

  According to a first aspect of the present invention, the electrical connection box main body having an attachment recess provided with a first connection connector, and being assembled by being superimposed on the attachment recess of the electrical connection box main body, And a mounting body provided with a second connector for connection on the mounting surface to the mounting recess, and the mounting body is rotated on the mounting recess, whereby the first In the electrical connection box in which the connection connector is connected to the second connection connector and the attachment body is assembled to the electrical connection box body, one side of the overlapping surface side of the attachment body An edge portion is a rotating shaft, and the mounting body is rotated around the rotating shaft in a state where the rotating shaft is in contact with the bottom surface of the mounting recess. The side surface of the one side corner portion has a bowl-like protrusion. One of a hook protrusion and an insertion hole through which the lock protrusion is inserted, and the lock protrusion and the insertion hole are formed on a side wall of the mounting recess facing the side surface of the mounting body. The other side of the hole is formed, and in the rotation start state in which the mounting body is inclined with respect to the mounting recess and the rotation shaft is brought into contact with the bottom surface, the lock protrusion is inserted into the insertion hole. The rotation of the mounting body is permitted, while the mounting body is rotated around the rotation axis and the overlapping surface of the mounting body is overlapped with the mounting recess and assembled. Then, the lock protrusion is engaged with the insertion hole, whereby a lock mechanism is configured by the lock protrusion and the insertion hole.

  In the electrical junction box having a structure according to the present invention, by using the one side edge corner portion of the mounting surface side of the mounting body as the rotating shaft, the rotating shaft is in contact with the bottom surface of the mounting recess, The mounting body can be rotated around the rotation axis and assembled to the mounting recess. Accordingly, unlike the conventional structure, it is not necessary to separately project the rotating shaft from the mounting body, and it is not necessary to separately form a bearing for receiving the rotating shaft in the mounting recess. As a result, simplification and downsizing of the structure of the electrical junction box can be advantageously achieved.

  Furthermore, a lock projection protruding in a hook shape and a lock projection are inserted into a side surface constituting one side edge corner portion of the mounting body serving as the rotation shaft, and a side wall of the mounting recess facing the side surface of the mounting body. These lock projections and insertion holes constitute a locking mechanism that is disengaged when the mounting body starts rotating and is engaged when the mounting body is fully rotated. Has been. Accordingly, the function of preventing the attachment body assembled from the electrical connection box main body from being assembled as a result of the rotation by the lock mechanism is ensured without separately providing a rotation shaft protruding from the attachment body and a bearing for receiving the rotation shaft. . In particular, by providing the lock mechanism by effectively using the space between the opposing surfaces of the mounting body and the mounting recess, it is possible to obtain a detachment preventing function without increasing the size of the electrical junction box. Further, in the rotation start state in which the mounting body is inclined with respect to the mounting recess and the rotation shaft is brought into contact with the bottom surface of the mounting recess, the rotation shaft of the mounting body is directed to the insertion hole at the bottom surface of the mounting recess. The lock protrusion can be easily inserted into the insertion hole simply by sliding. As a result, both the rotation operation of the attachment body and the assembly operation of the lock mechanism can be easily performed.

  In addition, by adjusting the protrusion height of the lock protrusion and the size of the insertion hole, the inclination angle of the attachment body with respect to the attachment recess in the rotation start state can be arbitrarily set. For example, when the protrusion height of the lock protrusion is reduced and the size of the insertion hole is increased, the inclination angle of the attachment body with respect to the attachment recess can be set small. Thereby, an operator's rotation operation range can be suppressed small and the attachment operation | work to the electrical-connection box main body of an attachment body can also be made easy. On the other hand, if the protrusion height of the lock protrusion is increased and the size of the insertion hole is reduced, the inclination angle with respect to the attachment recess of the attachment body in the rotation start state increases, but the insertion hole of the lock protrusion The wrap allowance can be ensured greatly, and the engagement stability of the mounting body to the electrical junction box body can be improved.

  According to a second aspect of the present invention, in the first aspect, the insertion hole is formed in a side wall of the mounting recess, and the bottom surface of the mounting recess has the insertion hole. The hollow part connected to is formed.

  According to this aspect, the lock protrusion of the attachment body can be released to the recess in the rotation start state where the attachment body is inclined with respect to the attachment recess. Thereby, the slide operation and the rotation operation of the attachment body in the rotation start state, and the insertion operation to the insertion hole of the lock protrusion can be performed more easily. In addition, since the recess is recessed further downward than the insertion hole, even if the protrusion height of the lock protrusion is slightly increased, the lock protrusion is released into the recess so that the mounting body in the rotation start state is The inclination angle with respect to the mounting recess can be set small, and it is possible to advantageously achieve both ease of mounting by rotating the mounting body to the electrical junction box body and stability of engagement of the mounting body to the electrical junction box body. .

  According to a third aspect of the present invention, in the one described in the first or second aspect, the insertion hole is pressed against the distal end surface of the lock protrusion in the rotation completion state of the attachment body. A holding projection is provided.

  In this aspect, the front end surface of the lock projection is pressed against the holding projection when the mounting body is completely rotated. Thereby, in the mounting state to the electrical junction box body, it is possible to advantageously prevent the mounting body from rattling with a simple structure.

  According to a fourth aspect of the present invention, in the one described in the third aspect, the insertion hole is formed in a side wall of the mounting recess, and the electric connection box is provided below the holding projection. A first opening window penetrating the wall portion of the main body is formed, and a second opening window penetrating the wall portion of the electric junction box main body is provided at a position separated from the first opening window. is there.

  In this aspect, the 1st opening window is provided using the die punching hole required when forming a holding | maintenance protrusion. Thereby, the inside of the electrical junction box main body is exposed to the outside through the first opening window, and the heat dissipation of the heat generating components such as a relay housed inside the electrical junction box main body can be enhanced. Furthermore, in addition to the first opening window, a second opening window is provided at a position separated from the first opening window, thereby forming a ventilation mechanism inside the electric junction box body, one of which is an air supply hole and the other is an exhaust hole. It is possible to further promote heat dissipation.

  In the present invention, in the mounting body assembled in the mounting recess of the electrical junction box body, the one side edge corner on the overlapping surface side to the mounting recess is used as the rotation axis. Thereby, it is not necessary to separately project the rotating shaft from the mounting body, and it is not necessary to form a bearing for receiving the rotating shaft in the mounting recess. As a result, the structure of the electrical junction box can be simplified and downsized. In addition, a locking mechanism is provided between the opposing surfaces of the mounting body and the mounting recess, which is disengaged when the mounting body starts to rotate, and includes a locking protrusion and an insertion hole that are engaged when the rotation is completed. It has been. As a result, a detachment prevention mechanism that prevents the attachment body assembled to the electrical junction box body from detaching can be formed in a space-efficient manner, and the electrical junction box can be further miniaturized.

The perspective view in the state of the assembly | attachment of the attachment body of the electrical junction box as one Embodiment of this invention. The perspective view from the direction different from FIG. 1 of the electrical-connection box shown in FIG. The top view of the assembly | attachment state of the attachment body of the electrical-connection box shown in FIG. IV-IV sectional drawing in FIG. The enlarged view of the A section in FIG. Cross-sectional explanatory drawing which shows the assembly | attachment procedure of an attachment body. Sectional drawing corresponding to FIG. 5 which shows the state with a large inclination | tilt angle of an attachment body. Sectional drawing corresponding to FIG. 6 which shows a state with a small inclination | tilt angle of an attachment body.

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

  First, FIG. 1 to FIG. 4 show an electrical junction box 10 as an embodiment of the present invention. The electrical junction box 10 has a structure in which a BCM (Body Control Module) 14 as an attachment body is attached to the electrical junction box main body 12. 1 and 2 show a state in the middle of assembling the BCM 14 to the electric junction box main body 12. In the following description, the vertical direction refers to the vertical direction in FIG.

  The electrical junction box body 12 has a substantially rectangular box shape, and has a structure in which a printed circuit board 20 is accommodated in a case 19 constituted by an upper case 16 and a lower case 18 formed of synthetic resin. ing. The upper case 16 is formed with a mounting recess 22 having a rectangular recess shape. Side walls 24 a to 24 d protrude from the outer peripheral edge of the mounting recess 22. Note that notches 26 and 26 are formed in the middle portions of the side walls 24b and 24d, respectively, so that the BCM 14 can be easily removed. In the bottom surface 28 of the mounting recess 22, a connector insertion hole 30 that penetrates the wall portion 29 of the upper case 16 is formed at the end portion on the side wall 24 a side.

  In the upper case 16, an engaging portion 32 is formed on a side surface 31a where the side wall 24a is formed. The engaging portion 32 has a shape in which a claw portion 36 protrudes from an engaging piece 34 that can be elastically deformed.

  Further, in the upper case 16, an insertion hole 38 having a rectangular opening shape is provided through an intermediate portion of the side wall 24 c. Further, the side wall 24c is formed with a protruding portion 40 that protrudes outside the side wall 24c and surrounds the upper portion of the insertion hole 38 in a U-shape, and as shown in FIG. The inner surface 42 is formed across the side wall 24 c and the protrusion 40. A holding projection 44 is formed on the upper inner surface 42 of the insertion hole 38. The holding projection 44 is formed on the inner surface 42 of the insertion hole 38 so as to straddle the side wall 24c and the protruding portion 40. The holding projection 44 protrudes downward from the inner surface 42 with a triangular tapered shape and extends in parallel with the side wall 24c. Is formed. In the wall portion 29 of the upper case 16, a die punching hole 48 for forming the holding projection 44 is formed in a portion located below the holding projection 44. The part 29 is penetrated.

  Further, on the bottom surface 28 of the mounting recess 22, a concave recess 50 is formed in the portion where the insertion hole 38 is formed. The recess 50 is a rectangular recess formed continuously with the insertion hole 38, whereby the bottom surface 28 has a shape that is recessed by one step in the formation portion of the insertion hole 38 by the recess 50. ing.

  In the upper case 16, a relay mounting portion 52 and a plurality of fuse mounting portions 54 are formed outside the side wall 24 c of the mounting recess 22. Furthermore, notched side openings 56a and 56b (only 56a is shown in the figure) are formed on the side surfaces 31b and 31c where the side walls 24b and 24d are formed.

  On the other hand, although detailed illustration is omitted, the lower case 18 has a substantially rectangular plate shape. As shown in FIG. 4, the lower case 18 is formed with support ribs 58 for supporting a printed circuit board, which will be described later, at appropriate positions.

  A printed circuit board 20 is accommodated between the upper case 16 and the lower case 18. A plurality of relays 60 are provided on the printed circuit board 20. A first connection connector 64 is provided at one end in the longitudinal direction (left and right direction in FIG. 4) of the printed circuit board 20. The first connecting connector 64 is disposed so as to protrude upward from the printed circuit board 20. Further, side connection connectors 66a and 66b (only 66a is shown in the figure) are provided on the outer peripheral portions on both sides extending in the longitudinal direction of the printed circuit board 20. These side connection connectors 66a and 66b are arranged to be opened to the side of the printed circuit board 20. Further, in the longitudinal direction of the printed circuit board 20, the end opposite to the first connection connector 64 is connected to a relay 62 mounted on the relay mounting portion 52 and a fuse (not shown) mounted on the fuse mounting portion 54. A plurality of connection terminals (not shown) are provided.

  The upper case 16 and the lower case 18 are assembled to each other by appropriate engaging means with the printed board 20 interposed therebetween, so that the printed board 20 is accommodated in the case 19. As a result, the first connection connector 64 provided on the printed circuit board 20 is projected onto the bottom surface 28 of the mounting recess 22 of the upper case 16 through the connector insertion hole 30 of the upper case 16. The first connection connector 64 is inserted through the connector insertion hole 30 with a slight gap, and the first connection connector 64 and the connector insertion hole 30 allow the first connection connector 64 to be connected to the interior 68 of the case 19. A vent hole 70 that communicates with the external space is formed. Further, side connection connectors 66a and 66b provided on the printed circuit board 20 are disposed between the side openings 56a and 56b of the upper case 16 and the lower case 18, and the upper case passes through the side openings 56a and 56b. 16 are opened on the side surfaces 31a and 31c, respectively. Furthermore, a plurality of connection terminals (not shown) protruding from the end of the printed circuit board 20 opposite to the first connection connector 64 are disposed in the relay mounting portion 52 and the plurality of fuse mounting portions 54, respectively. It has come to be. In this way, the electrical junction box body 12 is configured.

  On the other hand, the BCM 14 has a substantially rectangular box shape corresponding to the mounting recess 22 of the electrical junction box body 12. The BCM 14 has a structure in which a printed circuit board is accommodated in a case 72 composed of an upper case and a lower case made of a synthetic resin, but the BCM 14 is simply illustrated in FIGS. . The printed circuit board accommodated in the case 72 of the BCM 14 is provided with a second connection connector 74, and the second connection connector 74 passes through the through-hole 76 provided in the case 72. Is opened on the overlapping surface 77 facing the mounting recess 22. The second connection connector 74 is disposed on one end side of the BCM 14.

  Further, in the case 72 of the BCM 14, a lock protrusion 80 is formed on a side surface 78 a located on the side opposite to the second connection connector 74. As shown in FIG. 5, the locking protrusion 80 has a substantially L-shaped hook shape protruding outward from the side surface 78 a and extending upward. The lock protrusion 80 has a size that can be accommodated in the insertion hole 38 of the electrical junction box body 12. As a result, the side surface 78a of the case 72 has a substantially flat surface shape where the locking protrusion 80 is formed, and the one side edge corner portion 82a, which is the edge of the side surface 78a on the overlapping surface 77 side, is The BCM 14 extends in a straight line over the entire length in the width direction (left-right direction in FIG. 3).

  In the case 72 of the BCM 14, an engagement frame 84 is formed on a side surface 78 b located on the second connection connector 74 side. The engaging frame 84 has a frame shape that protrudes outward from the upper end of the side surface 78b and extends downward.

  First, as shown in FIG. 6A, such a BCM 14 is inclined with respect to the bottom surface 28 of the mounting recess 22 in the electrical junction box body 12, and the one side edge corner 82a abuts against the bottom surface 28. Is set to the rotation start state. Then, the BCM 14 is maintained to be inclined with respect to the bottom surface 28 and is slid to the side wall 24c side, whereby the lock protrusion 80 is inserted into the insertion hole 38. Thereafter, as shown in FIG. 6B, the BCM 14 is rotated toward the bottom surface 28 around the one side corner portion 82a with the one side corner portion 82a as the rotation axis. In such a rotation start state, the lock projection 80 is inserted into the insertion hole 38 and is disengaged from each other, thereby allowing the BCM 14 to rotate. Then, the first connection connector 64 protruding from the bottom surface 28 is connected to the second connection connector 74 of the BCM 14. At the same time, the engagement frame 84 of the BCM 14 gets over the claw portion 36 in the engagement portion 32 of the electrical junction box body 12 and is locked. In this way, as shown in FIG. 4, the BCM 14 is assembled to the electrical junction box body 12 with the overlapping surface 77 of the BCM 14 being in a state where the rotation is completed with the bottom surface 28 of the mounting recess 22 being overlapped.

  Then, as shown in FIG. 5, when the BCM 14 is in a rotation completion state, the side surface 78a of the BCM 14 and the side wall 24c of the mounting recess 22 are positioned opposite to each other, and the lock protrusion protruding from the side surface 78a. The front end face 86 of 80 is pressed against the holding protrusion 44 protruding from the inner face 42 of the insertion hole 38 formed in the side wall 24c. As a result, the lock protrusion 80 is engaged with the insertion hole 38 and is engaged with the side wall 24 c of the mounting recess 22. As a result, the detachment from the attachment recess 22 at the end of the BCM 14 on the side surface 78a side is prevented, and the BCM 14 is fixed to the electrical junction box body 12. Thus, in this embodiment, the lock mechanism is configured including the lock protrusion 80 and the insertion hole 38.

  In addition, as shown in FIG. 7, when the concave depression 50 is formed in a portion adjacent to the insertion hole 38 on the bottom surface 28, a depression is formed when the inclination angle α with respect to the bottom surface 28 of the BCM 14 is large. By inserting the lock protrusion 80 into the portion 50, the lock protrusion 80 can be easily inserted into the insertion hole 38. Further, as shown in FIG. 8, in the mounting recess 22, the protruding height dimension upward of the side wall 24 a located on the first connection connector 64 side is such that the BCM 14 is slid and one side edge angle of the BCM 14 is Until the portion 82b exceeds the side wall 24a, the BCM 14 is set to a height dimension that does not contact the first connection connector 64. Thus, the first connection connector 64 is protected from the collision of the BCM 14.

  In the electrical junction box 10 having the structure according to the present embodiment, the BCM 14 can be assembled to the mounting recess 22 by rotating around one side edge corner 82a of the BCM 14 as a rotation axis. As a result, it is not necessary to provide the BCM 14 with a special protrusion serving as a rotating shaft, and it is not necessary to form a bearing that supports the rotating shaft of the BCM 14 in the electrical junction box body 12. As a result, the BCM 14 and the electrical junction box body 12 can be simplified and downsized.

  Further, by inserting the lock projection 80 of the BCM 14 into the insertion hole 38 of the mounting recess 22 and press-contacting it with the holding projection 44, the BCM 14 can be held in the mounting state in the mounting recess 22. ing. And, by forming the insertion hole 38 and the lock projection 80 on the side wall 24c and the side surface 78a, which are the opposing surfaces of the mounting recess 22 and the BCM 14, respectively, without enlarging the electrical junction box body 12 and the BCM 14, A lock mechanism that prevents the BCM 14 from being detached from the electrical junction box body 12 is configured. In particular, when the rotation of the BCM 14 is completed, the lock protrusion 80 is brought into pressure contact with the holding protrusion 44, so that the lock protrusion 80 and the holding protrusion 44 interfere with each other during the sliding and rotation of the BCM 14. The locking projection 80 can be easily inserted into the insertion hole 38 simply by sliding the BCM 14, and the BCM 14 rises excessively with respect to the bottom surface 28 of the mounting recess 22 (inclination with respect to the bottom surface 28). (Corner: increasing α) is also unnecessary, and assembly workability can be improved.

  Furthermore, by adjusting the protrusion height of the lock protrusion 80 and the size of the insertion hole 38, the inclination angle of the BCM 14 in the rotation start state and the assembly strength with the electrical junction box body 12 can be arbitrarily set. I can do it. That is, by reducing the height of the lock protrusion 80 and increasing the size of the insertion hole 38, the inclination angle of the BCM 14 can be reduced and the assembly work can be facilitated. On the other hand, by increasing the height of the lock protrusion 80 and decreasing the size of the insertion hole 38, the lap allowance between the lock protrusion 80 and the holding protrusion 44 is increased, and the electric junction box body 12 of the BCM 14 is increased. Assembling strength can also be improved.

  In addition, the wall portion 29 of the upper case 16 is formed by the mold opening hole 48 for forming the holding projection 44 and the vent hole 70 formed by the gap between the first connection connector 64 and the connector insertion hole 30. Each is penetrated. As described above, the inside 68 of the case 19 is communicated with the outside of the case 19 through the die hole 48 and the vent hole 70, with the die hole 48 as the first opening window and the vent hole 70 as the second opening window. Thereby, the heat of the relay 60 and the like disposed in the inside 68 of the case 19 can be discharged to the outside of the case 19 through the mold punching hole 48 and the vent hole 70, and the heat dissipation inside the case 19 can be improved. I can do it. In particular, since the two opening windows of the mold punching hole 48 and the vent hole 70 are formed, a ventilation mechanism inside the case 19 having one air supply hole and the other an exhaust hole can be configured. Heat dissipation can be obtained.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the specific structure of the lock mechanism is not limited to that of the above-described embodiment, and the distal end surface 86 of the lock protrusion 80 of the BCM 14 is not provided with the holding protrusion 44 in the above-described embodiment, and the BCM 14 is completely rotated. May be directly pressed against the inner surface 42 of the insertion hole 38.

  It is also possible to provide the lock protrusion on the electrical junction box body side and the insertion hole on the attachment body side. For example, the lock protrusion 80 of the above embodiment is formed so as to protrude upside down on the side wall 24c of the attachment recess 22 and project toward the bottom surface 28 side, and the lock protrusion 80 is inserted into the case 72 of the BCM 14 A concave insertion hole 38 may be formed, and the inner surface below the insertion hole 38 may be pressed against the lock projection 80 from below by rotating the BCM 14.

10: Electrical junction box, 12: Electrical junction box body, 14: BCM (mounting body), 19: Case, 20: Printed circuit board, 22: Mounting recess, 24a to d: Side wall, 28: Bottom surface, 29: Wall portion , 30: Connector insertion hole, 31a to d: Side surface, 38: Insertion hole, 42: Inner surface, 44: Holding projection, 48: Mold extraction hole (first opening window), 50: Recessed portion, 64: First Connector for connection, 70: Vent (second opening window), 74: Connector for second connection, 77: Overlapping surface, 78a, b: Side surface, 80: Lock projection, 82a, b: One side edge angle Part, 86: tip surface

Claims (4)

An electrical junction box body having a mounting recess provided with a first connector for connection;
The electric connection box main body is configured to be overlapped and assembled to the mounting recess, and includes a mounting body provided with a second connection connector on the overlapping surface to the mounting recess,
By rotating the attachment body on the attachment recess, the first connection connector and the second connection connector are connected, and the attachment body is assembled to the electric junction box body. In the electrical junction box
The one side edge corner portion of the attachment body on the side of the overlapping surface is a rotation shaft, and the attachment body is rotated around the rotation shaft in a state where the rotation shaft is in contact with the bottom surface of the attachment recess. On the other hand,
The mounting body is provided with either one of a lock protrusion protruding in a hook shape and an insertion hole through which the lock protrusion is inserted, on the side surface constituting the one side corner of the mounting body. On the side wall of the mounting recess facing the side surface, the other of the lock protrusion and the insertion hole is formed,
In the rotation start state in which the attachment body is inclined with respect to the attachment recess and the rotation shaft is in contact with the bottom surface, the lock protrusion is inserted into the insertion hole, and the rotation of the attachment body is performed. While allowed
In the rotation completion state in which the attachment body is rotated around the rotation axis and the overlapping surface of the attachment body is overlapped and assembled to the attachment recess, the lock protrusion is engaged with the insertion hole. so,
An electrical junction box, wherein a lock mechanism is constituted by the lock protrusion and the insertion hole.   2. The electrical connection box according to claim 1, wherein the insertion hole is formed in a side wall of the mounting recess, and a recessed portion connected to the insertion hole is formed in the bottom surface of the mounting recess.   The electrical connection box according to claim 1, wherein the insertion hole is provided with a holding projection that is brought into pressure contact with a front end surface of the lock projection in a state where the rotation of the attachment body is completed.   The insertion hole is formed in the side wall of the mounting recess, and a first opening window is formed below the holding projection so as to penetrate the wall of the electric junction box body. The electrical connection box according to claim 3, wherein a second opening window penetrating the wall portion of the electrical connection box main body is provided at a position separated from the one opening window.

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