JP5626104B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box.

  As an electrical connection box including a cylindrical case having an opening and a connector having a housing that is accommodated in the case and can be fitted to a mating connector, for example, the one disclosed in Patent Document 1 is known.

  In this electrical junction box, when the connector is accommodated in the case, as a structure for locking the housing to the case, the lock receiver is provided with a lock projection on the housing and engaged with the lock projection on the lower end of the case. Is provided.

JP 2011-19377 A

  In the electrical junction box described in Patent Document 1, two lock receiving portions are provided on two opposing surfaces of a rectangular parallelepiped case. In this electrical junction box, the two lock receiving portions provided on one surface and the two lock receiving portions provided on the other surface are provided at positions that are substantially symmetrical with respect to the central axis of the case. . For this reason, when the connector is accommodated in the case, the orientation (arrangement direction) of the connector may be erroneously accommodated and coupled. If the connector is coupled to the case in the wrong orientation, the housing operation may need to be repeated, or components (terminals, boards, etc.) constituting the connector may be damaged.

  The present invention has been completed based on the above-described circumstances, and an object thereof is to provide an electrical junction box that prevents erroneous coupling between a case and a connector.

  In order to solve the above problems, the present invention provides a bottomed cylindrical case having a pair of opposed surfaces and an opening, and a connector having a housing that is accommodated in the case and that is open to be mated with a mating connector. The first connection portion for locking the connector is provided on one opposing surface of the pair of opposing surfaces of the case, while the other opposing surface is provided with the first connection portion. A second locking portion for locking the connector is provided, and the first locking portion and the second locking portion have a height from the open end of the housing when the connector is accommodated in the case. And the housing is provided with a first locked portion that is locked to the first locking portion at a position corresponding to the first locking portion, and the second The second locking at a position corresponding to the locking portion It has a feature where the second engaging portion to be engaged is provided on.

In the present invention, the first locking portion provided on one surface of the pair of opposing surfaces of the case and the second locking portion provided on the other surface, when the connector is accommodated in the case, The height from the opening end of the housing is different, and the first locked portion of the housing is formed at a position corresponding to the first locking portion of the case, and the second locked portion of the housing. The stop portion is formed at a position corresponding to the second locking portion of the case. In other words, in the present invention, the position of the first locked portion of the housing does not correspond to the position of the second locking portion of the case, and the position of the second locked portion of the housing is not aligned with the first locking portion of the case. Not supported. Therefore, in the present invention, even when the connector is inserted in the wrong direction, the first locking portion and the second locked portion, and the second locking portion and the first locked portion. Since both are not locked, there is no situation in which the connector is housed in the case with the wrong direction of the connector and coupled.
As a result, according to the present invention, it is possible to provide an electrical junction box that prevents erroneous coupling between the case and the connector.

The present invention may have the following configurations.
In the case, a plurality of the first locking portions are provided at intervals on the one opposing surface, and a plurality of the second locking portions are provided at intervals on the other opposing surface. The housing is provided with a plurality of first locked portions at positions corresponding to the plurality of first locking portions, and a plurality of the first locking portions at positions corresponding to the plurality of second locking portions. 2 locking parts are provided, and the interval between the adjacent first locking parts may be different from the interval between the adjacent second locking parts.

  With such a configuration, the interval between the first locking portions and the interval between the second locking portions are different. Therefore, before housing the connector in the case, the interval between the locking portions of the case The connector can be arranged in the correct direction with respect to the case by checking and corresponding to the interval between the locking portions. In addition, if the surface on which the first locking portion is mistakenly provided is disposed on the second locked portion side of the connector, the surface on which the second locking portion is disposed is the first locked portion of the connector. Even if it arrange | positions in the side, since the space | interval between 1st latching | locking parts and the space | interval between 2nd latching | locking parts are different, a case and a connector cannot be latched and combined. As a result, according to the above-described configuration, it is possible to reliably prevent erroneous coupling between the case and the connector.

  The connector is a circuit in which one end portion is arranged in the housing and the other end portion is led out from the back wall of the housing to the outside of the housing, and the other end portion of the terminal fitting is electrically connected. And a guide groove for guiding the circuit board into the case may be formed on an inner wall of the case.

  With such a configuration, when the connector having the circuit board is accommodated in the case, the circuit board is guided by the guide groove formed in the case. Therefore, when the connector is accommodated in the case, the circuit board is placed in the case. If the connector is disposed along the guide groove, the connector can be disposed in the correct direction and accommodated in the case. As a result, according to the above configuration, it is possible to prevent erroneous coupling between the connector including the circuit board and the case.

On the inner wall of the case, a mis-insertion preventing protrusion that protrudes in contact with the circuit board when the circuit board is inserted in a wrong direction to prevent erroneous insertion of the circuit board may be formed.
With this configuration, when a connector having a circuit board is arranged in the wrong direction and is to be accommodated in the case, the circuit board abuts against the erroneous insertion preventing protrusion on the inner wall of the case and further insertion is restricted. Is done.

  The erroneous insertion preventing protrusion may be formed adjacent to the guide groove. With such a configuration, the erroneous insertion preventing protrusion formed adjacent to the guide groove holds the circuit board inserted in the correct posture.

The surface of the housing that comes into contact with the opening of the case when the connector is accommodated in the case may be formed with a tapered surface that becomes thinner toward the tip.
With such a configuration, when the connector is accommodated in the case, the opening of the case is guided by the tapered surface of the housing, so that the operation of accommodating the connector in the case can be performed smoothly.

  ADVANTAGE OF THE INVENTION According to this invention, the electrical junction box which prevented the incorrect coupling | bonding of a case and a connector can be provided.

The perspective view of the electrical junction box of Embodiment 1 Front view of electrical junction box Rear view of electrical junction box Bottom view of electrical junction box AA sectional view of FIG. BB sectional view of FIG. CC sectional view of FIG. DD sectional view of FIG. Bottom view of the case Perspective view of the case as seen from the opening side EE sectional view of FIG. Bottom view of connector Rear view of connector Perspective view of the connector as seen from the front

<Embodiment 1>
An embodiment in which the present invention is applied to an on-vehicle electrical junction box 10 will be described with reference to FIGS. The electrical junction box 10 according to the present embodiment includes a connector 20 and a circuit board 30 housed in a synthetic resin case 11. The electrical junction box 10 is mounted on a vehicle (not shown) and distributes power from a power source (not shown) to a load (not shown). In the following description, the upper side in FIG. 1 is the upper side, and the lower side is the lower side. Also, the right side in FIGS. 4, 9 and 12 is the front side, and the left side is the back side.

(Case 11)
As shown in FIG. 1, the case 11 has a substantially rectangular parallelepiped shape (an example of a bottomed cylindrical shape). As shown in FIG. 9, the case 11 has an opening 11A on the lower side. Of the four side surfaces of the case 11, the two surfaces having the smaller areas (the left side surface in FIG. 2 is referred to as the “left side surface 12D” and the right side surface is referred to as the “right side surface 12C”). 2, the tongues 13A that extend in a cantilevered manner and can be elastically deformed are formed on the outer sides thereof, as shown in FIG. The tongue piece 13A is formed with a lock protrusion 13B that protrudes outward in the thickness direction of the tongue piece 13A. The lock projection 13B engages with a lock receiving portion provided in a storage portion (not shown) that stores the electrical connection box 10, so that the electrical connection box 10 is positioned in the storage portion.

  Further, in the inner wall 12E (the inner wall 12E of the case 11) of the left side surface 12D and the right side surface 12C of the case 11, as shown in FIGS. 5, 7, and 10, guide grooves for guiding the circuit board 30 into the case 11 are provided. 14A is formed. The guide groove 14 </ b> A is provided on the inner wall 12 </ b> E of the case 11 by forming two ribs 14 </ b> B and 14 </ b> C with a space slightly larger than the thickness of the circuit board 30. That is, the portion between the two ribs 14B and 14C functions as the guide groove 14A. In the vicinity of the upper surface 10B (an example of the bottom portion) of the case 11, a regulation protrusion 14D that regulates the lateral movement of the circuit board 30 is formed in the guide groove 14A. Of the two ribs 14B and 14C, the rib 14B on the front side 12A side of the case 11 is a first rib 14B, and the rib 14C on the back side 12B side of the case 11 is a second rib 14C.

  In the inner wall 12E of the left side surface 12D and the right side surface 12C of the case 11, an erroneous insertion preventing projection 15 is formed so as to overlap the first rib 14B (adjacent to the guide groove 14A). The erroneous insertion preventing protrusion 15 has a function of preventing insertion of the circuit board 30 by abutting and restricting insertion when the circuit board 30 is inserted in the wrong direction.

  Of the four side surfaces of the case 11, the two surfaces 12A and 12B having the larger area (the surfaces shown in the paper surface of FIGS. 2 and 3) are arranged at opposing positions (“a pair of opposing surfaces”). Equivalent to "face"). A protrusion 16 extending in the height direction is formed substantially at the center of the surface 12A (front side surface 12A) shown in FIG. Two protrusions 16 extending in the height direction are formed on the surface 12B (back side surface 12B) shown in FIG. 3 of the case 11. In the present embodiment, it is possible to determine the front and back by confirming the number of protrusions 16 formed on the case 11.

  As shown in FIG. 2, a first locking hole 17 that is locked to a first locking protrusion 22 (an example of a first locked portion) of the connector 20 is formed at the lower end of the front side surface 12 </ b> A of the case 11. (An example of the first locking portion) is provided with an interval between them, and the second locking protrusion 23 of the connector 20 is provided at the lower end portion of the back side surface 12B of the case 11 as shown in FIG. Two second locking holes 18 (an example of the second locking part) that are locked to (an example of the second locked part) are provided at an interval. The interval between the adjacent first locking holes 17 and 17 is set to be smaller than the interval between the adjacent second locking holes 18 and 18.

  As shown in FIGS. 6 and 7, the first locking hole 17 and the second locking hole 18 have a height from the opening end 21 </ b> B of the housing 21 of the connector 20 in the state where the connector 20 is accommodated. The stop hole 17 is provided so as to be arranged at a higher position than the second locking hole 18 (different from each other). In the present embodiment, when the upper surface 10B of the case 11 is disposed on the upper side, the first locking hole 17 is disposed at a higher position than the second locking hole 18 as shown in FIG. The end portion 11C of the front side surface 12A is also arranged at a higher position than the back side surface 12B.

  On the periphery of the first locking hole 17 and the periphery of the second locking hole 18, thick portions 17 </ b> A and 18 </ b> A that are formed thicker than other portions are provided. The thick portions 17A and 18A are provided in a U-shape in the peripheral edge portion of the first locking hole 17 and the peripheral edge portion of the second locking hole 18 except for the upper edge portion. The strength of the stop hole 17 and the second locking hole 18 is ensured.

  The lower end portion of the case 11 extends downward in the region where the first locking hole 17 is formed on the front side surface 12A, and the region where the second locking hole 18 is formed on the back side surface 12B. The shape is extended. In addition, in the lower end part of case 11, the extension part 19 of the back side surface 12B is formed wider than the extension part 19 of the front side surface 12A.

(Circuit board 30)
As shown in FIGS. 6 and 8, a circuit board 30 in which a conductive path (not shown) is formed by a printed wiring technique is accommodated in the case 11. The circuit board 30 has a generally rectangular shape. In the case 11, the circuit board 30 is arranged in a posture in which the plate surface is parallel to the wall surface of the back side surface 12 </ b> B of the case 11. An electronic component (not shown) is mounted on the conductive path formed on the front side surface (the right side surface in FIG. 6) of the circuit board 30.

  The lower end portion of the circuit board 30 is fixed by screwing into a screw hole 25 </ b> A provided on the outer surface of the back wall 24 of the housing 21 of the connector 20. A screw insertion hole 31 that is screwed into the screw hole 25 </ b> A is formed in a substantially central portion of the lower end portion of the circuit board 30. At the lower end of the circuit board 30, two positioning holes 32 are formed on both sides of the screw insertion hole 31, and a notch 33 is formed next to the left positioning hole 32 in FIG. Three positioning projections 25B provided on the outer surface of the rear wall 24 are respectively inserted.

(Connector 20)
As shown in FIG. 6, a synthetic resin connector 20 is disposed in the opening 11 </ b> A of the case 11 so as to block the opening 11 </ b> A. The connector 20 is formed by injecting a liquid synthetic resin material into a mold and then solidifying it. As a molding method, a known method such as injection molding can be used. The connector 20 includes a housing 21 having a lower opening 21A so that a mating connector (not shown) can be fitted (see FIG. 12). A wire harness connected to a load is connected to the mating connector.

  As shown in FIG. 6, the housing 21 is formed with a first locking protrusion 22 and a second locking protrusion 23 that protrude outward in the thickness direction of the housing 21. Specifically, the housing 21 protrudes outward from the housing 21 positioned on the front side (the right side in FIG. 6) and is engaged with the first locking holes 17 and 17 of the case 11. Two (first locked portions) are formed at an interval. Further, the housing 21 protrudes outward from the housing 21 located on the back side (left side in FIG. 6) and protrudes outward from the housing 21 to be locked in the second locking holes 18, 18 of the case 11. 2 latched portions) are formed at intervals.

  The first locking protrusion 22 is formed at a position corresponding to the first locking hole 17 of the case 11, and the second locking protrusion 23 is formed at a position corresponding to the second locking hole 18 of the case 11. ing. The first locking protrusion 22 is formed at a position higher than the second locking protrusion 23 from the opening end 21 </ b> B of the housing 21. The first locking protrusion 22 and the first locking hole 17 and the second locking protrusion 23 and the second locking hole 18 are elastically engaged with each other, so that the connector 20 is attached to the case 11. It can be assembled together.

  As shown in FIGS. 12 to 14, a bulging portion 26 is provided at the opening edge of the housing 21. The shape of the bulging portion 26 of the housing 21 is a shape corresponding to the shape of the opening portion 11 </ b> A (lower end portion) of the case 11. That is, the bulging portion 26 is provided in accordance with the formation range of the first locking projection 22 and the formation range of the second locking projection 23. In the region where the first locking projection 22 of the housing 21 is formed, the height of the bulging portion 26 is set higher than the region where the second locking projection 23 is formed. In the region on the left and right side surfaces in FIG. 13 of the bulging portion 26, that is, in the region where the right side surface 12 </ b> C and the left side surface 12 </ b> D of the case 11 are disposed, the upper end of the bulging portion 26 is higher than the back wall 24. Is set to

  A case receiving groove 27 into which the right side surface 12 </ b> C and the left side surface 12 </ b> D of the case 11 can be inserted is formed between the bulging portion 26 and the back wall 24 of the housing 21. In the region on the left and right side surfaces of the bulging portion 26 in FIG. 13, a thin tapered surface 28 is formed as it approaches the upper end (tip) of the bulging portion 26.

  A screw hole 25 </ b> A for screwing the circuit board 30 is formed on the outer surface of the back wall 24 of the housing 21 so as to protrude upward. On the outer surface of the rear wall 24 of the housing 21, two positioning protrusions 25B are formed on the left side in FIG. 13 and one positioning protrusion 25B is protruded upward on the right side in FIG.

  In the present embodiment, the electrical connection box 10 is illustrated in a posture with the connector 20 facing downward, but the electrical connection box 10 can be mounted on the vehicle in any posture as necessary. .

(Terminal fitting 29)
A plurality of terminal fittings 29 are arranged through the back wall 24 of the housing 21. The terminal fitting 29 is formed by pressing a metal plate material into a predetermined shape. One end portion 29 </ b> A (the end portion located on the lower side in FIG. 6) of the terminal fitting 29 is arranged so as to be located in the housing 21. One end portion 29 </ b> A of the terminal fitting 29 is electrically connected to a mating connector fitted in the housing 21.

  The other end portion 29B of the terminal fitting 29 is led out to the outside of the housing 21 (upward in FIG. 6) through the back wall 24, and then bent at a right angle toward the circuit board 30 side. It is penetrated by. The other end 29B of the terminal fitting 29 is electrically connected to a conductive path formed on the circuit board 30 by a known method such as soldering.

  The terminal fittings 29 are arranged in two rows on the back wall 24 of the connector 20 in the front-back direction (left-right direction in FIG. 6). Further, the terminal fittings 29 are arranged side by side in the direction from the left side to the right side in FIG.

(Assembly of electrical junction box 10)
When assembling the electrical junction box 10 of the present embodiment, first, the circuit board 30 is attached to the back wall 24 of the housing 21 of the connector 20 by screwing, and then the terminal fitting 29 is connected to the circuit board 30 by soldering or the like. To do. Next, the connector 20 to which the circuit board 30 is attached is accommodated in the case 11.
When housing the connector 20 in the case 11, first, the surface of the connector 20 on which the circuit board 30 is attached is disposed on the back side surface 12 </ b> B side of the case 11. In the present embodiment, the position of the lower end portion 11C of the front side surface 12A and the back side surface 12B of the case 11, the height of the first locking hole 17 and the second locking hole 18, and the two first locking holes 17 , 17 and the distance between the two second locking holes 18, 18 and the number of protrusions 16 on the front side surface 12A and the back side surface 12B are different. Can be judged.

  When the upper end portion of the circuit board 30 of the connector 20 arranged at a correct position is inserted into the case 11, the circuit board 30 is guided to the guide groove 14A formed in the inner wall of the left side surface 12D and the right side surface 12C of the case 11, 30 can be smoothly inserted into the case 11.

  When the connector 20 is inserted until the upper end portion of the bulging portion 26 of the housing 21 comes into contact with the lower end portions of the left side surface 12D and the right side surface 12C of the case 11, the opening portion 11 </ b> A of the case 11 is in the tapered surface 28 of the housing 21. It is guided and inserted into the case receiving groove 27.

  When the connector 20 is inserted until the first locking projection 22 of the housing 21 comes into contact with the lower end portion 11C of the front surface 12A of the case 11, the first locking projection 22 causes the front surface 12A of the case 11 to be contacted. The thick portion 17A on the lower side of the first locking hole 17 is pushed and elastically deformed outward. When the connector 20 is further inserted, the second locking projection 23 of the housing 21 comes into contact with the lower end portion 11C of the back side surface 12B of the case 11, and the second locking projection 23 causes the back side surface 12B of the case 11 to be in contact. The thick part 18A on the lower side of the second locking hole 18 is pushed and elastically deformed outward.

  When the first locking projection 22 is arranged in the first locking hole 17, the thick portion 17 </ b> A of the first locking hole 17 is elastically restored, and the first locking projection 22 becomes the first locking hole 17. Then, when the second locking projection 23 is disposed in the second locking hole 18, the thick portion 18A of the second locking hole 18 is elastically restored, and the second locking projection 23 is It is locked in the second locking hole 18. At this time, the upper end portion of the circuit board 30 reaches the vicinity of the upper surface 10B of the case 11, contacts the restricting protrusion 14D formed in the guide groove 14A, and the lateral movement is restricted. It is held in a state of being sandwiched between the erroneous insertion prevention protrusion 15 formed so as to overlap the first rib 14B and the second rib 14C. When the connector 20 is accommodated in the case 11 in this manner, the assembly of the electrical junction box 10 is completed.

(Operation and effect of this embodiment)
In this embodiment, when the connector 20 is arranged in the wrong direction and is to be inserted into the case 11, the circuit board 30 comes into contact with the inner wall of the case 11 when the circuit board 30 is inserted in the wrong direction. Since the mis-insertion preventing protrusion 15 is formed so as to prevent mis-insertion, the circuit board 30 attached to the connector 20 and the inner wall 12E of the case 11 can be prevented from being misinserted only by inserting the circuit board 30 into the case 11 slightly. The protrusions 15 come into contact with each other, and the insertion of the circuit board 30 in the direction of the upper surface 10B of the case 11 is restricted. As a result, misconnection between the connector 20 and the case 11 can be prevented.

  Incidentally, as described above, in the present embodiment, the insertion of the connector 20 is regulated by inserting the circuit board 30 into the case 11 by the erroneous insertion preventing protrusion 15 a little. You can know early.

  However, in this embodiment, even if the connector 20 is inserted in the case 11 with the connector 20 disposed in a wrong direction, the front surface 12A of the pair of opposing surfaces (the front surface 12A and the back surface 12B) of the case 11 is inserted. The first locking hole 17 provided and the second locking hole 18 provided in the back side surface 12 </ b> B are such that when the connector 20 is accommodated in the case 11, the first locking hole 17 is the second locking hole. The height from the opening end 21 </ b> B of the housing 21 is higher than the hole 18, and the first locking projection 22 and the second locking projection 23 of the housing 21 are the first locking of the case 11, respectively. It is formed at a position corresponding to the hole 17 and the second locking hole 18. In addition, in the present embodiment, the interval between the adjacent first locking holes 17 and 17 and the interval between the adjacent second locking holes 18 and 18 are also different.

  In other words, in this embodiment, even if the connector 20 is arranged in the wrong direction and is about to be accommodated in the case 11, the first locking projection 22 of the housing 21 is positioned away from the second locking hole 18 of the case 11 (high The second locking projection 23 of the housing 21 does not correspond in position (height and spacing) to the first locking hole 17 of the case 11. Therefore, in the present embodiment, even when the connector 20 is inserted in the case 11 with the wrong direction, the first locking hole 17, the second locking protrusion 23, and the second locking hole 18 are inserted. Since the first locking projection 22 and the first locking projection 22 are not locked, they cannot be accommodated and connected to the case 11 with the connector 20 disposed in the wrong direction.

  According to the present embodiment, the guide wall 14A for guiding the circuit board 30 into the case 11 is formed in the inner wall 12E of the case 11, so that the connector 20 having the circuit board 30 is accommodated in the case 11. Since the circuit board 30 is guided by the guide groove 14A formed in the case 11, the circuit board 30 is arranged along the guide groove 14A of the case 11 when the connector 20 is accommodated in the case 11. Then, the connector 20 can be placed in the correct direction and accommodated in the case 11.

  Further, according to the present embodiment, the surface of the housing 21 that comes into contact with the opening 11A of the case 11 when the connector 20 is accommodated in the case 11 is formed with a tapered surface 28 that becomes thinner toward the tip. Therefore, when the connector 20 is accommodated in the case 11, the opening 11 </ b> A of the case 11 is guided by the tapered surface 28 of the housing 21, so that the operation of accommodating the connector 20 in the case 11 can be performed smoothly.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the case where the number of protrusions formed on one surface and the other surface is different is shown, but the number of protrusions is the same on one surface and the other surface. It may be a case where no protrusion is formed.
(2) The above embodiment includes a case having two first locking holes and two second locking holes, and a housing having two first locking protrusions and two second locking protrusions. Although what has a connector was shown, this invention is not limited to this. The number of the first locking holes, the second locking holes, the first locking protrusions, and the second locking protrusions may be one or three or more. Further, the number of the first locking holes and the number of the second locking holes may not be the same.
(3) In the above embodiment, the distance between the first locking holes is different from the distance between the second locking holes, but the distance between the first locking holes and the distance between the second locking holes. May be the same.
(4) Although the connector including a circuit board is shown in the above embodiment, the present invention can be applied even to a connector that does not include a circuit board.
(5) In the above-described embodiment, the case where the guide groove and the erroneous insertion prevention protrusion are provided on the inner wall is shown, but the case where only the guide groove or the erroneous insertion prevention protrusion is provided may be used. In addition, although the erroneous insertion prevention protrusion is shown adjacent to the guide groove, the erroneous insertion prevention protrusion is provided at a position not adjacent to the guide groove, for example, on the inner side of the back side of the case in the insertion direction. May be.
(6) In the above embodiment, the taper surface is formed on the surface of the housing that contacts the opening (lower end) when the connector is accommodated in the case, but the taper surface is not formed. It may be a thing.

DESCRIPTION OF SYMBOLS 10 ... Electrical junction box 11 ... Case 11A ... Opening part 11B ... Upper surface 12A ... Front side surface (one surface)
12B ... Back side (the other side)
12E ... Inner wall 14A ... Guide groove 14B ... First rib 14C ... Second rib 15 ... Misinsertion preventing projection 17 ... First locking hole (first locking portion)
18 ... 2nd locking hole (2nd locking part)
DESCRIPTION OF SYMBOLS 20 ... Connector 21A ... Opening 21 ... Housing 21B ... Open end 22 ... 1st latching protrusion (1st to-be-latched part)
23 ... 2nd latching protrusion (2nd to-be-latched part)
24 ... Back wall 28 ... Tapered surface 29 ... Terminal fitting 29A ... One end 29B ... Other end 30 ... Circuit board

Claims (6)

An electrical junction box comprising a bottomed cylindrical case having a pair of opposed surfaces and an opening, and a connector having a housing accommodated in the case and opened to be matable with a counterpart connector,
Of the pair of opposing surfaces of the case, one opposing surface is provided with a first locking portion for locking the connector, and the other opposing surface is a second locking portion for locking the connector. Is provided,
The first locking portion and the second locking portion are provided such that the height from the opening end of the housing is different when the connector is accommodated in the case, and
The housing is provided with a first locked portion that is locked to the first locking portion at a position corresponding to the first locking portion, and the first locking portion that is locked to the second locking portion. 2. An electrical junction box provided with a second locked portion to be locked to the two locking portions. In the case, a plurality of the first locking portions are provided at intervals on the one opposing surface, and a plurality of the second locking portions are provided at intervals on the other opposing surface. ,
The housing is provided with a plurality of first locked portions at positions corresponding to the plurality of first locking portions, and a plurality of the second locking portions at positions corresponding to the plurality of second locking portions. A locked part is provided,
The electrical connection box according to claim 1, wherein an interval between the adjacent first engaging portions is different from an interval between the adjacent second engaging portions. The connector is a circuit in which one end portion is arranged in the housing and the other end portion is led out from the back wall of the housing to the outside of the housing, and the other end portion of the terminal fitting is electrically connected. A substrate,
The electrical connection box according to claim 1 or 2, wherein a guide groove for guiding the circuit board into the case is formed in an inner wall of the case. The case is characterized in that an erroneous insertion preventing protrusion is formed on the inner wall of the case so as to protrude when the circuit board is inserted in the wrong direction to prevent erroneous insertion of the circuit board. Item 4. An electrical junction box according to Item 3. The electrical connection box according to claim 4, wherein the erroneous insertion preventing protrusion is formed adjacent to the guide groove. The surface of the housing that comes into contact with the opening of the case when the connector is accommodated in the case is formed with a tapered surface that becomes thinner toward the tip. The electrical junction box according to any one of 5.

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