JP2015126543A - Electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connection box that can securely fit a cover to a body.SOLUTION: An electric connection box 1 comprises: a body 2 having an upper aperture 6 at one end of its circumferential wall; a circumferential wall part 8 of a double wall structure having an inner wall part 10 and an outer wall part 9; an upper cover 3 that is caused to clog the upper aperture 6 of the body 2 by fitting a circumferential wall 5 of the upper aperture 6 between the inner wall part 10 and the outer wall part 9; an engaging claw 11 so disposed on an outer circumferential face of the circumferential wall 5 of the body 2 as to extend in the outward direction; and an engaging part 13 disposed on the circumferential wall part 8 of the upper cover 3 and having a hole 13c into which the engaging claw 11 is inserted in a state in which the upper cover 3 clogs the upper aperture 6 of the body 2. In the electric connection box 1, an end part position of the inner wall part 10 at least in a first wall part 8a of the upper cover 3 is so set that the inner wall part 10 of the upper cover 3 comes into contact with the circumferential wall 5 of the body 2 from the inside of the body 2.

Description

  The present invention relates to an electrical junction box.

  Conventionally, electrical connection boxes (junction boxes, fuse boxes, relays) that are installed in vehicles such as automobiles and that house connection processing parts such as wire harnesses and electrical components such as fuses, relays, and electronic control units in an aggregate Also known as a box). For example, as described in Patent Document 1, such an electrical junction box includes a main body having an opening and a cover that covers the opening of the main body. In this electrical junction box, as a structure for attaching the cover to the main body, a rotation fulcrum portion is provided on the first wall of the peripheral walls of the cover, and a lock portion is provided on the second wall opposed to the opposite side of the first wall. Is provided. The electrical connection box can fix the cover to the main body by engaging the rotation fulcrum of the cover with the main body, rotating the cover toward the main body with the rotation center, and engaging the lock portion with the main body. it can.

JP 2010-130705 A

  The conventional electrical junction box has room for further improvement in that the cover is securely attached to the main body.

  This invention is made | formed in view of the above, Comprising: It aims at providing the electrical junction box which can attach a cover to a main body reliably.

  In order to solve the above-described problems, an electrical junction box according to the present invention has an opening at at least one end of a peripheral wall, a main body that houses an electronic component therein, and can be elastically deformed by an external force. The opening portion of the main body has a peripheral wall portion of a double wall structure composed of an outer wall portion, and the peripheral wall of the opening portion of the main body is fitted between the inner wall portion and the outer wall portion of the peripheral wall portion. A cover that covers the first wall of the peripheral wall of the main body, and is provided on the peripheral wall portion of the cover. The cover closes the opening of the main body. The cover covers the opening of the main body in a locking portion having a hole into which the engaging claw can be inserted in a state of being in a state and a second wall facing the first wall of the peripheral wall of the main body. Lock that can engage the cover with the main body And the engagement claw of the main body is engaged with the hole portion of the locking portion of the cover in a state where the cover is inclined toward the first wall. By rotating the cover to the second wall side around the engaging position of the locking portion, the cover closes the opening of the main body, and engages the lock mechanism, thereby Is fixed to the main body, the cover is disposed on the opening of the main body, and the locking portion of the cover is disposed closer to the opening than the engaging claw of the main body. In this state, the cover is elastically deformed by applying an external force to the main body side to the cover, and the engaging portion gets over the engaging claw so that the engaging claw is inserted into the hole. So that the cover is in front of the body It is possible to perform a fitting operation for transitioning to a state in which the opening is closed, and the inner wall portion of the cover is brought into contact with the peripheral wall of the main body until the cover is deformed to the maximum during the fitting operation. The end position of the inner wall portion of the cover is set so as to come into contact from the inside of the main body.

  In the electrical junction box, a main body side connection surface that connects the end surface of the peripheral wall and the inner peripheral surface is provided in the opening of the main body, and the main body side connection surface performs the fitting operation. It is preferable that the inner wall portion of the cover is guided to the inside of the main body until the cover is deformed to the maximum.

  In the electrical junction box, the main body side connection surface is preferably a tapered surface.

  In the electrical junction box, a cover-side connection surface that connects an end surface and an outer peripheral surface of the inner wall portion is provided on the inner wall portion of the cover, and the cover is deformed to the maximum during execution of the fitting operation. In the meantime, the end position of the inner wall portion of the cover and the shape of the cover side connection surface are set so that the cover side connection surface contacts the peripheral wall of the main body from the inside of the main body. It is preferable.

  In the electrical junction box, it is preferable that an engagement claw side connection surface that connects an end surface of the engagement claw and the surface on the opening side is provided on the engagement claw.

  In the electrical junction box according to the present invention, even when the cover is elastically deformed in the outer direction of the main body during the fitting operation, the inner wall portion of the cover is in contact with the peripheral wall of the main body from the inner side. Can be prevented from jumping out of the peripheral wall. Thereby, it is possible to fit the peripheral wall of the main body between the outer wall portion and the inner wall portion of the cover by the fitting operation, and there is an effect that the upper cover can be securely attached to the main body.

FIG. 1 is a perspective view showing a schematic configuration of an electrical junction box according to an embodiment of the present invention. FIG. 2 is a perspective view of the upper cover in FIG. FIG. 3 shows the state of the main body side when the lock portion on the main body side is engaged with the lock receiving portion of the upper cover in a state where the locking portion of the upper cover is not correctly engaged with the engagement claw of the main body. It is a longitudinal cross-sectional view which shows the positional relationship of an engaging claw and the latching | locking part by the side of an upper cover. FIG. 4 is a longitudinal sectional view showing the positional relationship between the engaging claw on the main body side and the engaging portion on the upper cover side during the fitting operation in the electrical junction box of the present embodiment. FIG. 5 is a longitudinal sectional view showing the positional relationship between the engaging claw on the main body side and the engaging portion on the upper cover side during the fitting operation in the electrical junction box of the present embodiment. FIG. 6 is a longitudinal sectional view showing a positional relationship when the fitting operation is completed and the engagement claw on the main body side and the locking portion on the upper cover side are correctly engaged.

  Hereinafter, embodiments of an electrical junction box according to the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

  First, the configuration of the electrical junction box 1 according to the present embodiment will be described with reference to FIGS. FIG. 1 is a perspective view showing a schematic configuration of an electrical junction box according to an embodiment of the present invention, and FIG. 2 is a perspective view of an upper cover in FIG. In the following description, the upper direction of FIG. 1 is expressed as “upward direction” of the electrical connection box 1, and the lower direction of FIG. 1 is expressed as “downward direction” of the electrical connection box 1.

  The electrical junction box 1 according to the present embodiment is mounted on a vehicle such as an automobile, and collects and accommodates connection processing parts such as wire harnesses and electrical components such as fuses, relays, and electronic control units. is there. The electrical junction box 1 is installed, for example, in an engine room of a vehicle or a lower part of a vehicle body, and is connected between a power source such as a battery and various electronic devices mounted in the vehicle. The electrical junction box 1 distributes the electric power supplied from the power source to various electronic devices in the vehicle. The electrical connection box 1 may be called a junction box, a fuse box, a relay box, or the like. In the present embodiment, these are collectively called an electrical connection box.

  As shown in FIG. 1, the electrical junction box 1 includes a main body 2, an upper cover 3 (cover), and a lower cover 4.

  The main body 2 accommodates various electronic components such as the above connection processing components and electrical components. The main body 2 is formed in a frame shape by a peripheral wall 5 made up of a plurality of wall portions connected to each other. An upper opening 6 (opening) is opened above the peripheral wall 5, and a lower opening 7 is opened below the peripheral wall 5. The upper edge end portion 5c of the peripheral wall 5 on the upper opening 6 side is formed in a thin shape that is recessed toward the inside of the main body 2 in the thickness direction as compared with other portions, and when viewed from the outside of the main body 2 It has a stepped shape over the entire circumferential direction. In FIG. 1, the detailed configuration inside the main body 2 is omitted. In the following description, on the plane orthogonal to the vertical direction of the electrical junction box 1, the direction toward the inner side of the main body 2 is expressed as “inner side”, and the direction toward the outer side of the main body 2 is expressed as “outer side”.

  The upper cover 3 is attached to the upper surface of the main body 2. The upper cover 3 includes a peripheral wall portion 8 including a plurality of wall portions that are continuous with each other, and is formed in a bottomed frame shape in which an upper portion is closed by a ceiling wall 15. The upper cover 3 is attached to the main body 2 so as to close the upper opening 6 while covering the upper opening 6 of the main body 2. Further, as shown in FIG. 2, the peripheral wall portion 8 of the upper cover 3 includes an outer wall portion 9 located on the outer side of the peripheral wall portion 8 in the thickness direction, and an outer wall portion 9 on the inner side of the outer wall portion 9 in the thickness direction. It has a so-called double wall structure having an inner wall portion 10 provided at a substantially constant interval. The upper cover 3 is attached to the main body 2 with the upper edge 5c of the peripheral wall 5 of the main body 2 being fitted between the outer wall portion 9 and the inner wall portion 10 of the peripheral wall portion 8, so that the upper cover 3 It is comprised so that it can prevent that water permeates into the inside from the connection part with the main body 2. Further, a stepped shape is formed on the inner peripheral surface side of the end portion of the outer wall portion 9. When the upper cover 3 is attached to the main body 2, this portion is the upper edge of the peripheral wall 5 on the main body 2 side. By abutting against the stepped shape of the part 5c, the vertical direction position of the upper cover 3 relative to the main body 2 is defined (see FIG. 6).

  The lower cover 4 is attached to the lower surface of the main body 2. The lower cover 4 includes a peripheral wall including a plurality of wall portions that are continuous with each other, and is formed in a bottomed frame shape with a lower portion closed. The lower cover 4 is attached to the main body 2 so as to close the lower opening 7 while covering the lower opening 7 of the main body 2. In FIG. 1, the detailed configuration of the lower cover 4 is omitted.

  The main body 2, the upper cover 3, and the lower cover 4 are formed of an insulating synthetic resin and are formed by a well-known injection molding, thereby enabling elastic deformation by an external force. In the present embodiment, as shown in FIG. 1, the main body 2, the upper cover 3, and the lower cover 4 are formed so that the cross-sectional shape in the vertical direction is a substantially rectangular shape, but the present invention is not limited to this.

  Next, a structure for attaching the upper cover 3 to the main body 2 will be described. As shown in FIG. 1, the main body 2 is provided to extend outward on the outer peripheral surface of the first wall 5 a among the plurality of wall portions constituting the peripheral wall 5, and is arranged 2 at a predetermined interval. Two engaging claws 11 are provided, and a lock portion 12 is provided on the outer peripheral surface of the second wall 5b disposed to face the first wall 5a. As shown in FIGS. 1 and 2, the upper cover 3 includes two locking portions 13 arranged at a predetermined interval on the outer peripheral surface of the first wall portion 8 a among the plurality of wall portions constituting the peripheral wall portion 8. In addition, a lock receiving portion 14 is provided on the outer peripheral surface of the second wall portion 8b disposed to face the first wall portion 8a.

  The first wall 5 a of the main body 2 and the first wall portion 8 a of the upper cover 3 are wall portions that are in positions that contact each other when the upper cover 3 is attached to the main body 2. Similarly, the second wall 5 b of the main body 2 and the second wall portion 8 b of the upper cover 3 are wall portions that are in positions that come into contact with each other when the upper cover 3 is attached to the main body 2. The two engaging claws 11 provided on the first wall 5 a of the main body 2 and the two engaging portions 13 provided on the first wall 8 a of the upper cover 3 are attached to the main body 2. Are disposed at the same position. Similarly, the lock portion 12 provided on the second wall 5 b of the main body 2 and the lock receiving portion 14 provided on the second wall portion 8 b of the upper cover 3 are the same when the upper cover 3 is attached to the main body 2. It is arranged at each position. That is, in a state where the upper cover 3 is attached to the main body 2, the two engaging claws 11 of the main body 2 and the two locking portions 13 of the upper cover 3 are engaged with each other, and the lock portion 12 of the main body 2 and the upper The lock receiving portion 14 of the cover 3 is engaged. Thereby, the state in which the upper cover 3 is fitted to the main body 2 is maintained, and the upper cover 3 is fixed to the main body 2.

  As shown in FIGS. 1 and 2, each of the two locking portions 13 has a shaft portion 13a and a pair of arm portions 13b that connect both ends of the shaft portion 13a and the first wall portion 8a. The axial directions of the shaft portions 13a of the two locking portions 13 are the same, and both are the short direction of the upper cover 3, in other words, the intersection line between the plane including the outer surface of the first wall portion 8a and the horizontal plane. Parallel to the extending direction. The locking portion 13 forms a square ring shape by the shaft portion 13a, the pair of arm portions 13b, and the first wall portion 8a. The engaging claw 11 on the main body 2 side is inserted into the central ring-shaped hole 13c of the locking portion 13 and the contact state with the shaft portion 13a is maintained, so that the engaging claw 11 is engaged with the engaging portion. 13 (see FIG. 6).

  The lock portion 12 is configured to be engageable with the lock receiving portion 14 by a predetermined operation, and is configured to be able to release the engaged state with the lock receiving portion 14. Known configurations can be used for the engagement and disengagement of the lock portion 12 and the lock receiving portion 14. In the present embodiment, the lock portion 12 and the lock receiving portion 14 are “a state in which the upper cover 3 blocks the upper opening 6 of the main body 2 in the second wall 5 b facing the first wall 5 a of the peripheral wall 5 of the main body 2. At this time, the upper cover 3 functions as a lock mechanism that can be engaged with the main body 2. In addition, arrangement | positioning of the lock part 12 and the lock | rock receiving part 14 is good also as a reverse of this embodiment. That is, the lock receiving portion 14 may be provided on the main body 2 side, and the lock portion 12 may be provided on the upper cover 3 side.

  When the upper cover 3 is attached to the main body 2 in such an attachment structure, first, the upper cover 3 is engaged with the first wall portion 8a of the upper cover 3 inclined to the first wall 5a side of the main body 2. The engaging claw 11 of the main body 2 is inserted into the hole 13c of the stopper 13. At this time, the shaft portion 13a of the engaging portion 13 is in contact with the engaging claw 11 from below, and the first wall portion 8a of the upper cover 3 is close to the first wall 5a of the main body 2, while The second wall portion 8 b of the upper cover 3 is in a state separated from the second wall 5 b of the main body 2. In this state, the upper cover 3 is tilted toward the second wall 5b of the main body 2 while maintaining the contact between the engaging claw 11 and the shaft portion 13a of the locking portion 13, whereby the upper cover 3 is moved to the shaft portion 13a. Is turned toward the upper opening 6 of the main body 2. Then, the upper edge 5c of the peripheral wall 5 of the main body 2 is fitted into the gap between the outer wall portion 9 and the inner wall portion 10 of the upper cover 3, and the lock portion 12 on the main body 2 side is engaged with the lock receiving portion 14 of the upper cover 3. As a result, the upper cover 3 is fixed to the main body 2.

  By the way, in such a mounting structure, the lock portion 12 on the main body 2 side is connected to the lock receiving portion of the upper cover 3 in a state where the engaging portion 13 of the upper cover 3 is not correctly engaged with the engaging claw 11 of the main body 2. 14 may be engaged. FIG. 3 is a longitudinal sectional view showing a positional relationship between the engaging claw 11 on the main body 2 side and the locking portion 13 on the upper cover 3 side in this case. As shown in FIG. 3, in this case, the engaging claw 11 is not inserted into the hole 13 c of the locking portion 13, and the shaft portion 13 a of the locking portion 13 is not above the engaging claw 11 but above the engaging claw 11. Therefore, the upper cover 3 cannot face the upper opening 6 of the main body 2. As a result, the entire upper edge end portion 5c of the peripheral wall 5 of the main body 2 cannot be fitted between the outer wall portion 9 and the inner wall portion 10 of the upper cover 3, and the upper cover 3 is normally attached to the main body 2. I can't.

  The upper cover 3 is made of an elastically deformable material such as synthetic resin. For this reason, the state in which the normal attachment of the upper cover 3 to the main body 2 has failed as described above (the upper cover 3 is disposed on the upper opening 6 of the main body 2 and the locking portion 13 of the upper cover 3 is In a state in which the shaft portion 13a is disposed above the engaging claw 11 of the main body 2 (on the upper opening 6 side), for example, an operator who performs an operation of attaching the upper cover 3 to the main body 2 strikes the upper cover 3, etc. When an external force F is applied to the upper cover 3 from above, the first wall portion 8a and the locking portion 13 of the upper cover 3 are elastically deformed outward, and the locking portion 13 is correctly engaged with the engaging claw 11 of the main body 2. As a result, the upper edge 5c of the peripheral wall 5 of the main body 2 is correctly fitted in the gap between the outer wall portion 9 and the inner wall portion 10 of the upper cover 3 so that the upper cover 3 Transition to the state of closing the upper opening 6 It can be. This transition operation is called “fitting operation” in this paper.

  However, when the peripheral wall portion 8 of the upper cover 3 has a double wall structure including the outer wall portion 9 and the inner wall portion 10 as in the present embodiment, the inner wall portion 10 of the upper cover 3 is fitted by the fitting operation of the upper cover 3. It is conceivable that a situation may occur where the outer wall protrudes outside the peripheral wall 5 of the main body 2. In such a situation, the upper edge 5c of the peripheral wall 5 of the main body 2 cannot be fitted into the gap between the outer wall 9 and the inner wall 10 of the upper cover 3, and even if the fitting operation is performed, the upper The cover 3 cannot be changed to a state in which the upper opening 6 of the main body 2 is blocked.

  Therefore, in this embodiment, the inner wall portion 10 of the upper cover 3 contacts the peripheral wall 5 of the main body 2 from the inside of the main body 2 until the upper cover 3 is deformed to the maximum during the fitting operation of the upper cover 3. Thus, the end position of the inner wall portion 10 of the upper cover 3 is set. As shown in FIG. 2, the peripheral wall portion 8 of the upper cover 3 is formed such that the length of the inner wall portion 10 in the vertical direction is shorter than that of the outer wall portion 9. And the length of the up-down direction of the inner wall part 10 is shape | molded shortest in the 1st wall part 8a in which the latching | locking part 13 is provided. In other words, the end position of the inner wall portion 10 of the first wall portion 8a is provided so as to be closer to the ceiling wall 15 side than the end portion position of the outer wall portion 9, and the first wall portion where the locking portion 13 is provided. In 8a, it is provided so that it may approach the ceiling wall 15 side most. Thus, the inner wall portion 10 of the upper cover 3 can come into contact with the peripheral wall 5 of the main body 2 from the inside during the fitting operation, and can be prevented from jumping outward from the peripheral wall 5. It is configured.

  More specifically, as shown in FIG. 3, in the upper opening 6 of the main body 2, a tapered surface 23 (connection surface) that connects the end surface 21 and the inner peripheral surface 22 to the upper edge end portion 5 c of the peripheral wall 5. Is provided. Then, the inner wall portion 10 of the upper cover 3 is in contact with the tapered surface 23 until the upper cover 3 is deformed to the maximum during the fitting operation of the upper cover 3. The end position of is set. That is, the taper surface 23 of the peripheral wall 5 of the main body 2 functions as a guiding means for guiding the inner wall portion 10 of the upper cover 3 to the inside of the main body 2 during the operation of fitting the upper cover 3.

  Further, in the present embodiment, as shown in FIG. 3, the inner wall portion 10 of the upper cover 3 is provided with a tapered surface 26 (cover side connection surface) that connects the end surface 24 of the inner wall portion 10 and the outer peripheral surface 256. ing. Then, the upper cover 3 is in contact with the peripheral wall 5 of the main body 2 from the inside of the main body 2 until the upper cover 3 is deformed to the maximum during the fitting operation of the upper cover 3. The end portion position of the inner wall portion 10 and the shape of the tapered surface 26 are set.

  Further, as shown in FIG. 3, a tapered surface 29 (engagement claw) connecting the end surface 27 of the engagement claw 11 and the upper surface 28 (upper opening 6 side) to the engagement claw 11 on the main body 2 side. Side connection surface).

  Next, referring to FIGS. 4 to 6 in addition to FIG. 3, the fitting operation in the electrical junction box 1 of the present embodiment will be described. 4 and 5 are longitudinal sectional views showing the positional relationship between the engaging claw 11 on the main body 2 side and the locking portion 13 on the upper cover 3 side during the fitting operation in the electrical junction box of the present embodiment. FIG. 6 is a longitudinal sectional view showing a positional relationship when the fitting operation is completed and the engaging claw 11 on the main body 2 side and the locking portion 13 on the upper cover 3 side are correctly engaged.

  First, as shown in FIG. 3, in a state where the normal attachment of the upper cover 3 to the main body 2 has failed, the shaft portion 13 a of the locking portion 13 of the upper cover 3 is located above the engaging claw 11 of the main body 2 ( It is in contact with the surface 28 on the opening 6 side. For this reason, the upper cover 3 does not face the main body 2, and the first wall portion 8 a is lifted upward, and the main body 2 is interposed between the outer wall portion 9 and the inner wall portion 10 in the first wall portion 8 a. The upper edge portion 5c of the peripheral wall 5 is not fitted.

  From this state, for example, when an external force F is applied from above the upper cover 3 such as when an operator strikes the ceiling wall 15 of the upper cover 3 from above, the shaft portion 13a of the locking portion 13 of the upper cover 3 comes into contact. The reaction force is received from the engaging claw 11 of the main body 2 in the outward direction of the main body 2. As a result, as shown in FIG. 4, the first wall portion 8 a of the upper cover 3 is curved outward, and the shaft portion 13 a moves toward the end surface 27 along the surface 28 of the engaging claw 11, and finally Go over the engaging claw 11 and advance downward. At this time, in this embodiment, since the tapered surface 29 is provided between the upper surface 28 and the end surface 27 of the engaging claw 11, the shaft portion 13a of the upper cover 3 moves over the engaging claw 11. It can be made even smoother.

  Next, as shown in FIG. 5, the tapered surface 26 of the inner wall portion 10 of the upper cover 3 contacts the tapered surface 23 of the peripheral wall 5 of the main body 2. The tapered surface 26 of the inner wall portion 10 of the upper cover 3 is provided on the outer peripheral surface 25 side of the inner wall portion 10, and the tapered surface 23 of the peripheral wall 5 of the main body 2 is provided on the inner peripheral surface 22 side of the peripheral wall 5. At this time, the inner wall portion 10 of the upper cover 3 is in contact with the peripheral wall 5 of the main body 2 from the inside of the main body 2. In this state, when the upper cover 3 is further pushed from above, the inner wall portion 10 of the upper cover 3 is guided along the tapered surface 23 of the peripheral wall 5 of the main body 2 toward the inside of the main body 2. Here, in the present embodiment, a tapered surface 23 is provided on the inner peripheral surface 22 side of the peripheral wall 5 of the main body 2, and a tapered surface 26 is further provided on the outer peripheral surface 25 side of the inner wall portion 10 of the upper cover 3. Therefore, the facing area between the inner wall portion 10 of the upper cover 3 and the peripheral wall 5 of the main body 2 during the fitting operation can be increased, and the inner wall portion 10 of the upper cover 3 can be more easily guided in the inner direction of the main body 2 than the peripheral wall 5. it can.

  Then, as shown in FIG. 6, as a result of the inner wall portion 10 of the upper cover 3 entering inward from the peripheral wall 5 of the main body 2, the upper edge end portion 5 c of the peripheral wall 5 of the main body 2 becomes the outer wall portion 9 of the upper cover 3. And the inner wall portion 10 are fitted into a gap. Furthermore, since the first wall portion 8a of the upper cover 3 that has curved outward after the shaft portion 13a of the upper cover 3 has passed over the engaging claw 11, the shaft portion of the upper cover 3 is elastically recovered to the original shape. 13 a is arranged below the engaging claw 11. Thereby, the engaging claw 11 of the main body 2 is inserted into the hole 13c of the locking portion 13 of the upper cover 3 and is properly engaged with the locking portion 13. As a result, the upper cover 3 is fitted into the main body 2 and fixed. That is, the state in which the normal attachment of the upper cover 3 to the main body 2 failed can be changed to a state in which the upper cover 3 blocks the upper opening 6 of the main body 2 by the fitting operation.

  Next, the effect of the electrical junction box 1 according to the present embodiment will be described.

  The electrical junction box 1 of the present embodiment has an upper opening 6 at one end of a peripheral wall 5, and can be elastically deformed by an external force and a main body 2 that houses electronic components therein, and from the inner wall 10 and the outer wall 9. And the peripheral wall 5 of the upper opening 6 of the main body 2 is fitted between the inner wall portion 10 and the outer wall portion 9 of the peripheral wall portion 8. 6, an upper cover 3 that is provided on the first wall 5 a of the peripheral wall 5 of the main body 2 so as to extend outward, and a peripheral wall portion 8 of the upper cover 3. In the state in which the upper opening 6 of 2 is closed, the locking part 13 having the hole 13c into which the engaging claw 11 can be inserted, and the second wall 5b facing the first wall 5a of the peripheral wall 5 of the main body 2, When the upper cover 3 closes the upper opening 6 of the main body 2, the upper cover 3 is engaged with the main body 2. It comprises a capacity locking mechanism (locking portion 12 and the lock receiving portion 14), the. The electrical junction box 1 engages the engaging claw 11 of the main body 2 with the hole 13c of the engaging portion 13 of the upper cover 3 in a state where the upper cover 3 is inclined toward the first wall 5a. Then, the upper cover 3 is turned to the second wall 5b side with the engaging position of the locking portion 13 as a center so that the upper cover 3 closes the upper opening 6 of the main body 2, and the lock portion 12 and the lock receiving portion 14, the upper cover 3 is configured to be fixed to the main body 2. In the electrical junction box 1, the upper cover 3 is disposed on the upper opening 6 of the main body 2, and the locking portion 13 of the upper cover 3 is closer to the upper opening 6 than the engaging claw 11 of the main body 2 (upward ), An external force applied to the upper cover 3 is applied to the upper cover 3 so that the upper cover 3 is elastically deformed. The engaging claw 11 is inserted into the upper cover 3, and as a result, a fitting operation in which the upper cover 3 transitions to a state in which the upper opening 6 of the main body 2 is closed can be performed. The electrical junction box 1 is at least so that the inner wall portion 10 of the upper cover 3 contacts the peripheral wall 5 of the main body 2 from the inside of the main body 2 until the upper cover 3 is deformed to the maximum during the fitting operation. The position of the end portion of the inner wall portion 10 in the first wall portion 8a of the upper cover 3 is set.

  With this configuration, even when the upper cover 3 is elastically deformed in the outward direction of the main body 2 during the fitting operation, the inner wall portion 10 of the upper cover 3 is in contact with the peripheral wall 5 of the main body 2 from the inner side. The inner wall portion 10 can be prevented from jumping out from the peripheral wall 5 of the main body 2. Accordingly, the upper edge 5c of the peripheral wall 5 of the main body 2 can be fitted between the outer wall portion 9 and the inner wall portion 10 of the upper cover 3 by the fitting operation, and the upper cover 3 is attached to the main body 2. Can be securely attached.

  In the electrical junction box 1 of the present embodiment, a tapered surface 23 that connects the end surface 21 of the peripheral wall 5 and the inner peripheral surface 22 is provided in the upper opening 6 of the main body 2. The tapered surface 23 guides the inner wall portion 10 of the upper cover 3 to the inside of the main body 2 until the upper cover 3 is deformed to the maximum during execution of the fitting operation.

  With this configuration, the area of the opposed surface of the upper cover 3 to the peripheral wall 5 of the main body 2 with respect to the inner wall 10 of the upper cover 3 can be increased by the action of the tapered surface 23. Accordingly, the inner wall portion 10 of the upper cover 3 can be easily brought into contact with the peripheral wall 5 of the main body 2 from the inside, so that the inner wall portion 10 of the upper cover 3 can be more easily guided toward the inner side of the main body 2 than the peripheral wall 5.

  Further, in the electrical junction box 1 of the present embodiment, the inner wall portion 10 of the upper cover 3 is provided with the tapered surface 26 that connects the end surface 24 and the outer peripheral surface 25 of the inner wall portion 10, and the upper is performed during the fitting operation. Until the cover 3 is deformed to the maximum, the position of the end of the inner wall portion 10 of the upper cover 3 and the taper surface 26 come into contact with the peripheral wall 5 of the main body 2 from the inside of the main body 2. The shape of the surface 26 is set.

  With this configuration, the facing area of the inner wall portion 10 of the upper cover 3 with respect to the peripheral wall 5 of the main body 2 can be increased during the fitting operation. Thereby, since the inner wall part 10 of the upper cover 3 can be easily brought into contact with the peripheral wall 5 of the main body 2 from the inside, the inner wall part 10 of the upper cover 3 can be more easily guided in the inner direction of the main body 2 than the peripheral wall 5.

  In the electrical junction box 1 of the present embodiment, the engaging claw 11 provided on the main body 2 is provided with a tapered surface 29 that connects the end surface 27 of the engaging claw 11 and the surface 28 on the upper opening 6 side. . With this configuration, during the fitting operation, the shaft portion 13a of the locking portion 13 of the upper cover 3 can smoothly move over the engagement claw 11 and wrap around downward, so that the main body 2 of the upper cover 3 can be moved. Can be more reliably attached.

  As mentioned above, although embodiment of this invention was described, the said embodiment was shown as an example and is not intending limiting the range of invention. The above-described embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The above-described embodiments and modifications thereof are included in the invention described in the claims and the equivalents thereof, as long as they are included in the scope and gist of the invention.

  In the embodiment described above, the attachment of the upper cover 3 and the main body 2 has been described as an example, but the present invention can also be applied to the attachment of the lower cover 4 and the main body 2.

  In the above embodiment, the tapered surface 23 is provided on the upper edge 5 c of the peripheral wall 5 of the main body 2, the tapered surface 26 is provided on the inner wall portion 10 of the upper cover 3, and the tapered surface 29 is provided on the engaging claw 11 of the main body 2. However, the configuration may be such that these tapered surfaces 23, 26, 29 are not provided, or only a part of these tapered surfaces 23, 26, 29 may be provided.

  In the above embodiment, the tapered surfaces 23 and 26 are provided at the contact positions between the peripheral wall 5 of the main body 2 and the inner wall portion 10 of the upper cover 3 in the fitting operation, and the engaging claws 11 of the main body 2 are also provided. Although the configuration in which the tapered surface 29 is provided has been illustrated, the tapered surfaces 23, 26, and 29 may have a curved shape such as a convex shape or a concave shape instead of a linear cross-sectional shape.

1 Electrical junction box 2 Body 3 Upper cover (cover)
5 peripheral wall 5a first wall 5b second wall 6 upper opening (opening)
8 peripheral wall portion 9 outer wall portion 10 inner wall portion 11 engaging claw 12 lock portion (lock mechanism)
13 Locking portion 13c Hole portion 14 Lock receiving portion (lock mechanism)
23 Tapered surface (Body side connection surface)
26 Tapered surface (cover side connection surface)
29 Tapered surface (engagement claw side connection surface)

Claims (5)

A body that has an opening at at least one end of the peripheral wall and accommodates an electronic component;
A peripheral wall portion having a double wall structure composed of an inner wall portion and an outer wall portion is elastically deformable by an external force, and the peripheral wall of the opening portion of the main body is fitted between the inner wall portion and the outer wall portion of the peripheral wall portion. By combining, a cover for closing the opening of the main body,
An engaging claw provided on the first wall of the peripheral wall of the main body so as to extend outward.
A locking portion provided on the peripheral wall portion of the cover, and having a hole portion into which the engagement claw can be inserted when the cover closes the opening of the main body;
A lock mechanism capable of engaging the cover with the main body when the cover closes the opening of the main body on the second wall of the peripheral wall of the main body facing the first wall;
With
The engagement claw of the main body is engaged with the hole of the engagement portion of the cover in a state where the cover is inclined toward the first wall, and the engagement claw and the engagement portion are engaged. The cover is rotated toward the second wall around the position so that the cover closes the opening of the main body, and the lock mechanism is engaged to fix the cover to the main body. It is configured as
In a state where the cover is disposed on the opening of the main body and the locking portion of the cover is disposed closer to the opening than the engaging claw of the main body, the cover is moved to the main body side. When the external force is applied, the cover is elastically deformed, and the engagement portion gets over the engagement claw so that the engagement claw is inserted into the hole portion. It is possible to carry out a fitting operation for transitioning to a state in which the opening is closed,
The end of the inner wall portion of the cover is such that the inner wall portion of the cover contacts the peripheral wall of the main body from the inside of the main body until the cover is deformed to the maximum during the fitting operation. An electrical connection box characterized in that the position of the part is set. In the opening of the main body, a main body side connection surface that connects an end surface of the peripheral wall and an inner peripheral surface is provided,
The main body side connection surface guides the inner wall portion of the cover to the inside of the main body until the cover is deformed to the maximum during execution of the fitting operation. The electrical junction box described.   The electrical connection box according to claim 2, wherein the main body side connection surface is a tapered surface. A cover-side connection surface that connects the end surface and the outer peripheral surface of the inner wall portion is provided on the inner wall portion of the cover,
The end portion of the inner wall portion of the cover so that the cover-side connection surface contacts the peripheral wall of the main body from the inside of the main body until the cover is deformed to the maximum during execution of the fitting operation. The electrical connection box according to claim 1, wherein a position and a shape of the cover-side connection surface are set. The engagement claw side connection surface that connects the end surface of the engagement claw and the surface on the opening side is provided on the engagement claw, according to any one of claims 1 to 4. The electrical junction box described.

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