JP7222338B2 - electric junction box - Google Patents

Description

The present disclosure relates to electrical junction boxes.

2. Description of the Related Art Conventionally, an electrical connection box mounted on a vehicle has a case that accommodates electronic components. A terminal connected to, for example, a power supply wire is connected to the electronic component. The electrical junction box described in Patent Document 1 includes a cover member attached to a case while holding terminals inside. The cover member is held by the case by being inserted into a holding recess provided by cutting the side of the case.

JP 2019-103215 A

By the way, in the electric connection box described above, if the cover member is inserted into the holding recess of the case while the cover member is shifted, the cover member may be erroneously assembled with the cover member tilted with respect to the case. As a result, there is a problem that the cover member is not properly held with respect to the case.

An object of the present disclosure is to provide an electrical junction box in which a cover member can be easily assembled with a correct posture to a case.

The electric junction box of the present disclosure includes a cover member that holds terminals to which electric wires are connected, and a case that accommodates electronic components to which the terminals are connected. an electric connection box mounted on the case so that the cover member closes the holding recess by inserting the cover member toward the bottom of the holding recess, wherein The cover member has a cover body that closes the holding recess, and a facing wall that is provided on the front end side of the cover body in the inserting direction and faces the outer surface of the cover body, and the case includes: a protrusion projecting from the bottom of the holding recess and arranged between the outer side surface of the cover body and the facing wall; and an extending wall facing the outer surface of the cover body, wherein the extending wall is spaced further from the outer surface of the cover body than the facing wall.

According to the present disclosure, it is possible to provide an electric junction box in which the cover member can be easily assembled with the correct posture to the case.

FIG. 1 is a perspective view of an electric connection box in one embodiment. FIG. 2 is an exploded perspective view of the electric connection box in the same embodiment. FIG. 3 is an exploded perspective view of the electric connection box in the same embodiment. FIG. 4 is a top view of the electric connection box in the same embodiment. FIG. 5 is a front view of the electrical connection box in the same embodiment. FIG. 6 is a sectional view taken along line II of FIG. FIG. 7 is a cross-sectional view taken along line II-II of FIG. FIG. 8 is a cross-sectional view taken along line III-III in FIG. FIG. 9 is a sectional view taken along IV-IV in FIG. FIG. 10 is a perspective view showing a state before the case member is attached in the same embodiment. 11 is a perspective view showing a state in which the case member has moved downward in the Z direction from FIG. 10 in the same embodiment. 12 is a perspective view showing a state in which the case member has moved further downward in the Z direction from FIG. 11 in the same embodiment. FIG. 13 is a perspective view showing a mounted state of the case member in the same embodiment.

[Description of Embodiments of the Present Disclosure]
First, the embodiments of the present disclosure are listed and described.
The electrical junction box of the present disclosure is
[1] A cover member that holds a terminal to which an electric wire is connected, and a case that houses an electronic component to which the terminal is connected. An electric connection box having a recess and mounted on the case so that the cover member closes the holding recess by inserting the cover member toward the bottom of the holding recess, wherein the cover member is a cover body that closes the holding recess; and an opposing wall that is provided on the front end side of the cover body in the inserting direction and faces the outer surface of the cover body, and the case includes the holding recess. a projecting portion projecting from the bottom portion and disposed between the outer surface of the cover body and the facing wall; and an opposing extending wall, wherein the extending wall is spaced further from the outer surface of the cover body than the opposing wall.

According to the above aspect, when the cover member is inserted into the holding recess, and the cover member is displaced from the holding recess toward the outer side surface of the cover main body, that is, to the outside, the extending wall abuts the cover member. can be done. As a result, it is possible to prevent the cover member from being inserted to the outside in a deviated state. Therefore, the cover member can be easily attached to the case in a correct posture.

[2] It is preferable that the extension wall faces the outer surface of the cover main body on the front end side in the insertion direction.
According to the above aspect, it is possible to provide a suitable configuration for facilitating the insertion of the cover member toward the bottom of the holding recess on the leading end side in the insertion direction.

[3] It is preferable that the extending wall faces the facing wall.
According to the above aspect, the cover member facing the opposing wall can be held in the holding recessed portion by abutting against the opposing wall. Accordingly, it is possible to suppress displacement of the cover member in the attached state of the cover member.

[4] The end of the extension wall on the base end side in the insertion direction may be located closer to the base end side in the insertion direction than the end of the protrusion on the base end side in the insertion direction. preferable.

According to the above aspect, when the cover member is inserted, the extending wall faces the facing wall before the protrusion faces the facing wall. Thus, the extended wall guides the insertion of the cover member so that the projecting portion is properly inserted between the facing wall and the cover main body. Therefore, it is possible to easily attach the cover member to the case in a correct posture.

[5] The cover member has a fitting portion provided on the base end side in the insertion direction of the cover body, and the holding recess has a side portion extending from the bottom portion along the insertion direction. and a to-be-fitted portion provided on the side portion on the base end side in the inserting direction, wherein the fitting portion is fitted to the to-be-fitted portion along the inserting direction. is preferred.

According to the above aspect, the projecting portion is arranged between the cover main body and the opposing wall on the distal end side of the cover member in the insertion direction, thereby holding the cover member while maintaining the proximal end portion of the cover member in the insertion direction. On the side, the cover member can be held by fitting the fitting portion and the fitted portion. This can contribute to suppressing displacement of the cover member in the mounted state of the cover member.

[Details of the embodiment of the present disclosure]
Specific examples of the electrical connection box of the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

As shown in FIG. 1, the electrical connection box 1 includes a case 2 and a cover member 4 that holds terminals 3 . Electronic components (not shown) are housed inside the case 2 . Terminal 3 is connected to an electronic component. An electric wire 5 is connected to the terminal 3 . An example of the electric connection box 1 is, for example, a relay box that is mounted on a vehicle and performs connection between a plurality of in-vehicle devices.

The electric wire 5 is for power supply, for example, and supplies electric power to the electronic components in the case 2 . The terminals 3 are connected to electronic components in the case 2 using fastening members such as bolts and nuts. The cover member 4 is configured so that bolts and nuts can be inserted therethrough.

The electrical junction box 1 has X, Y and Z directions that are perpendicular to each other. The electrical connection box 1 has side walls on four sides in the X direction and the Y direction. Both sides in the Z direction of the electric connection box 1 are open. Here, along the Z direction in FIG. 1, the upper side of the paper surface is defined as the Z direction upper side, and the lower side of the paper surface is defined as the Z direction lower side. The electrical connection box 1 has the upper and lower openings in the Z direction closed by covers (not shown).

As shown in FIGS. 2 and 3 , the case 2 is provided with a holding recess 10 that holds the cover member 4 . The holding recess 10 is provided in the side wall of the case 2 so as to cut out the outer wall 2a on one side in the X direction. One side of the holding recess 10 in the X direction is open. The cover member 4 is held in the holding recess 10 by being inserted into the holding recess 10 from the upper side in the Z direction toward the lower side in the Z direction. The Z direction corresponds to the “insertion direction” of the cover member 4 . In the cover member 4 and the holding recess 10, the lower side in the Z direction is the "front side in the insertion direction", and the upper side in the Z direction is the "base side in the insertion direction".

The holding recess 10 has a bottom portion 10a provided on the lower side in the Z direction and side portions 10b extending from the bottom portion 10a along the Z direction. The bottom portion 10a contacts the cover member 4 and supports the cover member 4 in the Z direction. The side portions 10b are provided on both sides of the bottom portion 10a in the Y direction. The cover member 4 is inserted between the side portions 10b.

The cover member 4 includes a cover body 20 that closes the holding recess 10 when attached to the case 2 . The cover body 20 is provided so as to cover the opening on one side in the X direction of the case 2 formed by the holding recess 10 . The cover main body 20 has an outer surface 20a facing one side in the X direction. In the cover member 4 and the holding recess 10, the side facing the outer surface 20a, ie, one side in the X direction, is defined as the outside in the X direction, and the opposite side, ie, the other side in the X direction, is defined as the inside in the X direction.

The cover member 4 has a fitting portion 21 at the upper end in the Z direction of the cover body 20 . The fitting portion 21 has a first fitting portion 22 and a second fitting portion 23 . The first fitting portion 22 is provided on one side of the cover body 20 in the Y direction. The second fitting portion 23 is provided on the other side of the cover body 20 in the Y direction.

The cover member 4 has a facing wall 24 that faces the outer side surface 20 a of the cover body 20 . is provided on the lower end side of the cover body 20 in the Z direction. The facing wall 24 protrudes outward in the X direction from the cover body 20 and extends downward in the Z direction along the cover body 20 from this projecting portion. A portion of the opposing wall 24 extending in the Z direction faces the cover main body 20 while being separated therefrom. Also, the facing wall 24 is provided integrally with the cover main body 20 .

The cover member 4 is provided with an outlet 25 through which the electric wire 5 is pulled out from the cover body 20 to the outside. The outlet 25 is obliquely provided with respect to the cover main body 20 . A holding member such as a band is attached to the outlet 25 to hold the electric wire 5 in the outlet 25 . The electric wire 5 is arranged to bend in the X direction and the Y direction from the portion connected to the terminal 3 along the Z direction to the outlet 25 .

The holding recess 10 has a fitted portion 11 provided at the upper end in the Z direction of the side portion 10b. The fitted portion 11 has a first fitted portion 12 to which the first fitting portion 22 is fitted, and a second fitted portion 13 to which the second fitting portion 23 is fitted. there is The first fitted portion 12 is provided at the upper end in the Z direction of the side portion 10b on the one side in the Y direction of the holding recess 10 . The second fitted portion 13 is provided at the upper end in the Z direction of the side portion 10b on the other side in the Y direction of the holding recess 10 .

The case 2 has a projecting portion 15 projecting from the bottom portion 10a. The protruding portion 15 protrudes upward in the Z direction from the bottom portion 10a and is provided in the shape of a wall extending along the Y direction. The protrusion 15 is arranged between the cover body 20 and the opposing wall 24 . That is, the facing wall 24 faces the cover main body 20 with the projecting portion 15 interposed therebetween.

Further, the holding recess 10 has a projection 16 at a position facing the outlet 25 on the bottom 10a. The projecting portion 16 is provided so as to project from the bottom portion 10 a into the outlet 25 .

The case 2 has a first restricting wall 17 facing the cover body 20 from one side in the Y direction and a second restricting wall 18 facing from the inside in the X direction. The first restricting wall 17 is provided on one side of the holding recess 10 in the Y direction. The second restricting wall 18 is provided on the other Y-direction side of the holding recess 10 . The first restricting wall 17 and the second restricting wall 18 extend in the Z direction.

The case 2 has an extension wall 30 on the outer wall 2a. The extension wall 30 extends from the lower side of the holding recess 10 in the Z direction toward the holding recess 10 on the outer wall 2a. The extension wall 30 is provided outside the holding recess 10 in the X direction.

As shown in FIGS. 4 and 5, the first fitting portion 22 and the first fitting portion 12 are provided inside the cover body 20 in the X direction. The second fitting portion 23 and the second fitted portion 13 are located at the same position as the cover body 20 in the X direction. The opposing wall 24 is provided so as to protrude outward in the X direction from the cover main body 20 and covers the projecting portion 15 in the X direction and the Z direction. The extension wall 30 faces the cover body 20 in the X direction. The extension wall 30 is provided outside the opposing wall 24 in the X direction. Therefore, the extension wall 30 is further away from the cover body 20 than the opposing wall 24 in the X direction.

As shown in FIG. 6, the first fitting portion 22 has two insertion pieces 22a extending in the Z direction. The two insertion pieces 22a are arranged along the X direction while being spaced apart from each other. The first fitted portion 12 has two slits 12a extending in the Z direction and recessed in the Y direction. The two slits 12a are arranged along the X direction while being separated from each other. The two insertion pieces 22a are respectively inserted into the two slits 12a from above in the Z direction. Each insertion piece 22a fits into each slit 12a and is restricted from moving in the X direction.

As shown in FIG. 7, the second fitting portion 23 has two insertion pieces 23a extending in the Z direction. The two insertion pieces 23a are arranged along the X direction while being separated from each other. The second fitted portion 13 has two slits 13a extending in the Z direction and recessed in the Y direction. The two slits 13a are arranged along the X direction while being separated from each other. The two insertion pieces 23a are respectively inserted into the two slits 13a from above in the Z direction. Each insertion piece 23a fits into each slit 13a, and its movement in the X direction is restricted.

As shown in FIG. 8, the protrusion 16 protrudes upward in the Z direction from the bottom 10a. The projecting portion 16 protrudes into the outlet 25 and faces the inner surface of the outlet 25 in the X direction. The projection 16 restricts movement of the outlet 25 in the X direction by contacting the inner surface of the outlet 25 .

As shown in FIG. 9, the opposing wall 24 includes a first opposing wall portion 24a extending outward in the X direction from the cover body 20 and a second opposing wall portion 24b extending downward in the Z direction from the first opposing wall portion 24a. have. Thus, the facing wall 24 forms a groove 24c recessed in the Z direction between the cover body 20 and the facing wall 24 . The projecting portion 15 is inserted into the groove portion 24c. That is, the projecting portion 15 is sandwiched between the cover main body 20 and the second opposing wall portion 24b in the X direction. As described above, since the path from the gap between the groove portion 24c and the projecting portion 15 to the inside of the holding recess 10 is curved, it is possible to suppress the entry of foreign matter such as water into the holding recess 10. can.

The extending wall 30 has a first extending wall portion 31 extending outward in the X direction from the outer wall 2a of the case 2, and a second extending wall portion 32 extending upward in the Z direction from the first extending wall portion 31. ing. A second extending wall portion 32 of the extending wall 30 faces the cover main body 20 in the X direction.

The second extending wall portion 32 has a guide rib 32a projecting inward in the X direction. The guide ribs 32a extend in the Z direction. An upper portion of the guide rib 32a in the Z direction is provided with an inclined surface that slopes downward in the Z direction and inward in the X direction. The guide ribs 32a guide the cover member 4 so that the protrusions 15 are inserted into the grooves 24c. The guide ribs 32 a also function as reinforcing members for the second extending wall portion 32 .

The second extending wall portion 32 of the extending wall 30 is separated from the cover main body 20 . The distance D1 between the X-direction inner surface of the second extending wall portion 32 and the outer surface 20a of the cover main body 20 is equal to the X-direction outer surface of the second opposing wall portion 24b of the opposing wall 24 and the outer surface of the cover main body 20. 20a longer than the distance D2. The X-direction inner surface of the second extending wall portion 32 is the X-direction inner end surface of the guide rib 32a. That is, the second extending wall portion 32 is further away from the cover main body 20 than the opposing wall 24 is. The gap between the X-direction inner end surface of the guide rib 32a and the X-direction outer surface of the second opposing wall portion 24b of the opposing wall 24 is equal to the gap between the projecting portion 15 and the outer surface 20a of the cover body 20. is set shorter than

The second extending wall portion 32 extends upward in the Z direction from the position of the bottom portion 10a in the Z direction. In addition, the upper end in the Z direction of the second extending wall portion 32 is positioned higher in the Z direction than the upper end in the Z direction of the opposing wall 24 . Furthermore, it is preferable that the length dimension of the second extending wall portion 32 in the Z direction is equal to or greater than the length of the fitting margin between each fitting portion 21 and each fitted portion 11 . The fitting margin is the length in the Z direction of the portion where each insertion piece 22a, 23a and each slit 12a, 13a face each other.

Furthermore, the second extending wall portion 32 of the extending wall 30 faces the second opposing wall portion 24b from the outside in the X direction. The second extending wall portion 32 faces the projecting portion 15 with the second facing wall portion 24b interposed therebetween.

The operation of this embodiment will be described. Here, the procedure for attaching the cover member 4 to the case 2 will be described in the order of FIGS. 10 to 13. FIG.
As shown in FIG. 10, when the case 2 is mounted, the cover member 4 is inserted into the holding recess 10 from the upper side in the Z direction toward the lower side in the Z direction. The cover member 4 is inserted downward in the Z direction along the first restricting wall 17 and the second restricting wall 18 .

As shown in FIG. 11 , when the cover member 4 is inserted downward in the Z direction along the first restricting wall 17 and the second restricting wall 18 , the cover member 4 is positioned between the first restricting wall 17 and the holding recess 10 . and the wall surface on the other side in the Y direction, and displacement to both sides in the Y direction is suppressed. The second restricting wall 18 suppresses the inward displacement of the cover member 4 in the X direction.

By the way, if the other side of the cover member 4 in the Y direction is inserted away from the second restricting wall 18 to the outside in the X direction, the first fitting portion 22 and the first fitted portion 12 are fitted together. , the second fitting portion 23 and the second fitted portion 13 may not be properly fitted. In this case, the cover member 4 is attached obliquely to the case 2 . At this time, the cover member 4 is held by the fitting of the first fitting portion 22 and the first fitted portion 12 in an inclined state with respect to the holding recess 10 . Further, one side of the cover member 4 in the Y direction is displaced outward in the X direction. A situation may occur in which the fitting portion 12 is not properly fitted. Also in this case, the cover member 4 is obliquely attached to the case 2 . This phenomenon may occur because the electric wire 5 pulled out from the outlet 25 is pulled obliquely with respect to the cover body 20 .

Based on the above, in this embodiment, the extending wall 30 is provided facing the cover main body 20 from the outside in the X direction. As the cover member 4 is inserted along the first restricting wall 17 and the second restricting wall 18, the extending wall 30 and the cover main body 20 are positioned to face each other in the X direction. Here, if the cover member 4 were displaced outward in the X direction before the position where the extension wall 30 and the cover member 4 opposed each other, the extension wall 30 would come into contact with the cover member 4 in the Z direction. touch. As a result, subsequent insertion of the cover member 4 is prohibited.

The extending wall 30 faces the opposing wall 24 from the outside in the X direction. When the extending wall 30 and the opposing wall 24 face each other, the opposing wall 24 is inserted inside the extending wall 30 in the X direction. That is, the second opposing wall portion 24b is inserted while facing the guide ribs 32a of the second extending wall portion 32 . The X-direction inner end surface of the guide rib 32a abuts against the second opposing wall portion 24b, thereby suppressing the cover member 4 from shifting outward in the X-direction. Further, when the cover member 4 shifts outward in the X direction and abuts against the guide rib 32a from above in the Z direction, the guide rib 32a guides the cover member 4 inward in the X direction by the inclined surface provided on the upper side in the Z direction.

As shown in FIG. 12 , when the cover member 4 and the extension wall 30 face each other and are further inserted downward in the Z direction, the first fitting portion 22 and the second fitting portion 23 are respectively closed. It is fitted to the first fitted portion 12 and the second fitted portion 13 . At this time, each insertion piece 22 a of the first fitting portion 22 is inserted into each slit 12 a of the first fitting portion 12 . Each insertion piece 23 a of the second fitting portion 23 is inserted into each slit 13 a of the second fitting portion 13 .

When the cover member 4 is further inserted while the fitting portions 21 and the to-be-fitted portions 11 are fitted, the protruding portion 15 faces the cover main body 20 and the facing wall 24 . Here, in the X direction, the gap between the X-direction inner end surface of the guide rib 32a and the X-direction outer surface of the second opposing wall portion 24b of the opposing wall 24 is It is provided shorter than the gap between Therefore, when the cover member 4 is displaced outward in the X direction, the guide rib 32a and the opposing wall 24 abut in the X direction, and the projecting portion 15 and the cover main body 20 do not abut. Therefore, by inserting the opposing wall 24 along the X-direction inner end surface of the guide rib 32a, the projecting portion 15 is reliably inserted into the groove portion 24c. That is, the extension wall 30 guides insertion of the cover member 4 so that the projection 15 is inserted into the groove 24c.

As shown in FIG. 13, when the cover member 4 is inserted to the point where it abuts against the bottom portion 10a, the fitting portions 21 and the fitted portions 11 are completely fitted. Also, the projecting portion 15 is completely inserted into the groove portion 24c. As a result, the cover member 4 is attached to the case 2 . Moreover, it is preferable that the cover member 4 is prevented from coming off in the Z direction by a locking mechanism (not shown) in the attached state.

As described above, the cover member 4 is inserted into the holding recess 10 while the extension wall 30 prevents the cover member 4 from shifting outward in the X direction. This makes it difficult for the positions of the fitting portions 21 and the positions of the fitted portions 11 to be misaligned.

When the cover member 4 is attached to the case 2 , the extension wall 30 and the projecting portion 15 are arranged so as to sandwich the opposing wall 24 . As a result, the extension wall 30 prevents the cover member 4 from shifting outward in the X direction even in the attached state.

Effects of the present embodiment will be described.
(1) The cover member 4 has a cover body 20 that closes the holding recess 10, and a facing wall 24 that is provided on the lower side of the cover body 20 in the Z direction and faces the outer surface 20a of the cover body 20. . The case 2 includes a projecting portion 15 that protrudes from the bottom portion 10a of the holding recess 10 and is arranged between the outer side surface 20a of the cover body 20 and the opposing wall 24, and a projecting portion 15 that extends from the outer wall 2a of the case 2 toward the holding recess 10 side. and an extending wall 30 facing the outer surface 20 a of the cover body 20 . The extension wall 30 is spaced further from the outer surface 20a of the cover body 20 than the opposing wall 24 is. According to this configuration, when the cover member 4 is inserted into the holding recess 10, if the cover member 4 is displaced from the holding recess 10 toward the outer surface 20a of the cover main body 20, that is, outward in the X direction, the cover member 4 extends. A configuration in which the wall 30 contacts the cover member 4 is possible. As a result, it is possible to prevent the cover member 4 from being deviated from being inserted outward in the X direction. Further, the cover member 4 can be inserted into the holding recess 10 while the extension wall 30 prevents the cover member 4 from shifting outward in the X direction. This makes it difficult for the positions of the fitting portions 21 and the positions of the fitted portions 11 to be misaligned. Therefore, the cover member 4 can be easily attached to the case 2 in a correct posture.

(2) The extension wall 30 faces the Z-direction lower outer surface 20a of the cover body 20 . According to this, it is possible to provide a configuration suitable for facilitating insertion of the cover member 4 toward the bottom portion 10a on the lower side in the Z direction in the holding recessed portion 10 .

(3) The extension wall 30 faces the opposing wall 24 . According to this configuration, the cover member 4 can be held in the holding recess 10 by the extension wall 30 contacting the opposing wall 24 . Thereby, in the mounted state of the cover member 4, the displacement of the cover member 4 can be suppressed.

(4) The Z-direction upper end of the extension wall 30 is positioned higher in the Z-direction than the Z-direction upper end of the projecting portion 15 . According to this, when the cover member 4 is inserted, the extension wall 30 faces the facing wall 24 before the projecting portion 15 faces the facing wall 24 . Accordingly, by inserting the opposing wall 24 along the extended wall 30, the projecting portion 15 can be reliably inserted into the groove portion 24c. That is, the extended wall 30 guides insertion of the cover member 4 so that the projecting portion 15 is properly inserted between the facing wall 24 and the cover main body 20 . Therefore, the cover member 4 can be easily attached to the case 2 in a correct posture.

(5) The cover member 4 has a fitting portion 21 provided on the upper side of the cover body 20 in the Z direction. The holding recess 10 has a side portion 10b extending along the Z direction from the bottom portion 10a, and a fitted portion 11 provided on the upper side in the Z direction of the side portion 10b. The fitting portion 21 is fitted to the fitted portion 11 along the Z direction. According to this, on the lower side of the cover member 4 in the Z direction, the projecting portion 15 is arranged between the cover main body 20 and the opposing wall 24 to hold the cover member 4, while the upper side of the cover member 4 in the Z direction is held. Then, the cover member 4 can be held by fitting the fitting portion 21 and the fitted portion 11 together. This can contribute to suppressing displacement of the cover member 4 in the mounted state of the cover member 4 .

This embodiment can be implemented with the following modifications. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
- Arrangement|positioning of the fitting part 21 and the to-be-fitted part 11 is not limited to this embodiment. The arrangement position of each fitting portion 21 and each fitted portion 11 can be changed. good too. Moreover, the numbers of the fitting portions 21 and the fitted portions 11 are not particularly limited.

- The shape of each fitting part 21 and each fitted part 11 can be changed suitably. Also, the shape and number of the insertion pieces 22a and 23a and the slits 12a and 13a can be changed as appropriate. Also, the fitting portion 21 may be provided with a slit, and the fitted portion 11 may be provided with an insertion piece.

The locking mechanism for preventing the cover member 4 from coming off in the Z direction may be provided on the fitting portion 21 and the fitted portion 11, may be provided on the wall surface of the holding recess 10, or may be provided on the case. 2 may be provided in other parts. Moreover, the locking mechanism is not particularly limited, and for example, a snap fit can be applied.

- The 1st control wall 17 and the 2nd control wall 18 are not limited to this embodiment, It is omissible.
- The holding recessed part 10 can be changed suitably. For example, the other side of the holding recess 10 in the X direction may be open.

- The extension wall 30 does not have to face the projecting portion 15 .
- The extension wall 30 may be provided at a position spaced apart from the bottom portion 10a in the Z direction.
- The direction perpendicular to the insertion direction is not limited to the X direction in this embodiment, and may be the Y direction. That is, the extension wall 30 is not limited to being provided outside the holding recess 10 in the X direction.

- The fitting portion 21 and the fitted portion 11 are not limited to facing each other in the X direction, and may face each other in the Y direction.
- The front side in the insertion direction may be the other side in the Z direction or may be one side.

The extension wall 30 is larger than the fitting margin between the first fitting portion 22 and the first fitted portion 12 and the fitting margin between the second fitting portion 23 and the second fitted portion 13 in the Z direction. is not limited to being long. However, if the extending wall 30 is provided longer than the fitting margin, the fitting portions 21 and the fitted portions 11 can be easily aligned by inserting the cover member 4 along the extending wall 30. can.

- The electric junction box 1 is not limited to one mounted on a vehicle. Also, the electrical connection box 1 may be a relay box, a junction box, or a fuse box.

REFERENCE SIGNS LIST 1 electrical connection box 2 case 3 terminal 4 cover member 5 electric wire 10 holding recess 10a bottom 10b side 11 fitted portion 12 first fitted portion 12a slit 13 second second Part to be fitted 13a... Slit 15... Protruding part 16... Protruding part 17... First restricting wall 18... Second restricting wall 20... Cover main body 21... Fitting part 22... First fitting part 22a... Insertion piece 23... Second fitting portion 23a Insertion piece 24 Opposing wall 24a First opposing wall 24b Second opposing wall 24c Groove 25 Drawer port 30 Extension wall 31 First extension wall 32 Second extending wall portion 32a... Guide rib D1... Distance D2... Distance

Claims (5)

a cover member holding a terminal to which an electric wire is connected;
and a case that houses an electronic component to which the terminal is connected,
The case has a holding recess provided so as to cut out an outer wall of the case,
An electrical connection box mounted to the case so that the cover member closes the holding recess by inserting the cover member toward the bottom of the holding recess,
The cover member has a cover body that closes the holding recess, and a facing wall that is provided on the front end side of the cover body in the insertion direction and faces the outer surface of the cover body,
The case includes a projecting portion that projects from the bottom portion of the holding recess and is arranged between the outer side surface of the cover body and the facing wall, and a projecting portion that extends from the outer wall of the case toward the holding recess. , and an extending wall facing the outer surface of the cover body,
The electrical connection box, wherein the extending wall is spaced further from the outer surface of the cover body than the opposing wall. 2. The electrical junction box according to claim 1, wherein said extending wall faces said outer surface of said cover body on said front end side in the insertion direction. 3. The electrical junction box according to claim 2, wherein said extending wall faces said opposing wall. 4. The end of the extension wall on the base end side in the insertion direction is positioned closer to the base end side in the insertion direction than the end on the base end side in the insertion direction of the projecting portion. Electrical junction box as described. The cover member has a fitting portion provided on the base end side of the cover main body in the insertion direction,
The holding recess has a side portion extending from the bottom portion along the insertion direction, and a fitted portion provided on the side portion on the base end side in the insertion direction,
The electrical junction box according to any one of claims 1 to 4, wherein the fitting portion is fitted to the fitted portion along the insertion direction.

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