JP6066838B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box having a function of internal protection during transportation or the like.

  2. Description of the Related Art Conventionally, a structure for protecting the interior of a junction box body, a cover, and an interior junction part (substrate, electronic unit, etc.) composed of interior parts (substrate, electronic unit, etc.) during transportation has been proposed.

  One example is an electrical junction box that uses a temporary cover different from a regular cover. However, in the case of this electrical junction box, there is a problem that the number of parts increases by the amount of the temporary cover. In addition, since the temporary cover is also loosely fixed, there is a problem in that the temporary cover falls off during transportation.

  Therefore, Patent Document 1 proposes an electrical junction box that temporarily fixes the cover at a position different from the position of the cover at the time of permanent fixing. In the case of this electrical junction box, there is no need to prepare a temporary cover as in the above-described conventional example, and the cover is securely fixed even in the temporarily fixed state, so that the cover does not fall off during transportation. .

  However, in the case of the electrical junction box disclosed in Patent Document 1, there is a problem that the cover cannot be removed again if it is permanently fixed during temporary fixing. Moreover, in order to implement | achieve temporary fixing, it is necessary to make the shape of a cover complicated, The point that cost increased by that was a problem.

JP 2004-096899 A

  An object of the present invention is to solve the above-described problems caused by the prior art, and to provide an electrical junction box having an internal protection function that changes its locking state depending on the presence or absence of interior parts.

  An electrical junction box according to an embodiment of the present invention is an electrical junction box including a junction box main body in which a substrate is accommodated, and a cover that is attached to the junction box main body and protects the substrate. In the case where the substrate is not accommodated, a temporary fixing mechanism that temporarily holds the connection box main body and the cover, and an end portion of the substrate when the substrate is accommodated in the connection box main body And a main fixing mechanism that restricts a part of the movement to make the main locking state.

  According to the electrical connection box according to the present embodiment, the main locking state and the temporary locking state can be switched depending on the presence or absence of the interior parts without changing the alignment position of the cover with respect to the connection box main body. In the state in which the interior parts are not accommodated, there is no possibility of accidental fixing. Moreover, since the cover is temporarily fixed even in the temporarily locked state as in the prior art, the risk of the cover falling off from the junction box main body due to vibration or the like generated during transportation can be reduced.

  The temporary fixing mechanism may have a structure in which the junction box body and the case are fitted.

  The main fixing mechanism includes a lock hole formed in the connection body, a lock arm formed in the cover, and a lock claw formed at an end of the lock arm. In a state in which the lock arm is bent by the portion, the lock claw may be engaged with the lock hole to be in the main locking state.

  The main fixing mechanism includes a lock hole formed in the connection portion main body, a lock arm formed in the cover, and a lock claw formed at an end of the lock arm. In the state where it is not bent, the lock claw may be engaged with the lock hole so as to be in the final locking state.

  The main fixing mechanism includes a lock arm formed on the cover and a lock claw formed on an end portion of the lock arm, and the lock claw is engaged with the end portion of the substrate. It may be a stationary state.

  ADVANTAGE OF THE INVENTION According to this invention, the electrical junction box with the internal protection function from which a latching state changes with presence or absence of interior components can be provided.

It is sectional drawing explaining the structure of the temporary latching state of the electrical-connection box which concerns on the 1st Embodiment of this invention. It is sectional drawing explaining the structure of the final locking state of the same electrical junction box. It is sectional drawing explaining the structure of the temporary latching state of the other electric junction box which concerns on the same embodiment. It is sectional drawing explaining the structure of the temporary latching state of the same electrical junction box. It is sectional drawing explaining the structure of the temporary latching state of the electrical-connection box which concerns on the 2nd Embodiment of this invention. It is sectional drawing explaining the structure of the final locking state of the same electrical junction box. It is a figure explaining a mode that it will be in a final locking state in the same electrical junction box. It is a figure explaining the structure of the temporary fixing mechanism of this electrical junction box, and this fixing mechanism. It is sectional drawing explaining the structure of the temporary latching state of the electrical-connection box which concerns on the 3rd Embodiment of this invention. It is sectional drawing explaining the structure of the final locking state of the same electrical junction box. It is sectional drawing explaining the structure of the final locking state of the same electrical junction box. It is a figure explaining the structure of the temporary latching state of the other electrical junction box which concerns on the same embodiment. It is sectional drawing explaining the structure of the final locking state of the same electrical junction box. It is sectional drawing explaining the structure of the final locking state of the same electrical junction box. It is a figure explaining the structure of the temporary latching state of the other electrical junction box which concerns on the same embodiment. It is sectional drawing explaining the structure of the final locking state of the same electrical junction box. It is sectional drawing explaining the structure of this latching state of the other electric junction box which concerns on the same embodiment. It is sectional drawing explaining the structure of this latching state of the other electric junction box which concerns on the same embodiment.

  Hereinafter, an electrical junction box according to an embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
The electrical junction box 100 according to the first embodiment of the present invention accommodates interior components such as a board and an electronic unit, and is used as an electrical junction box mounted on a vehicle such as an automobile.

  The electrical junction box 100 includes a junction box main body 110 that houses interior parts such as a substrate, and a cover 120 that is attached to the junction box main body 110 and protects the substrate and the like. The junction box main body 110 and the cover 120 are molded from resin or the like.

Next, the locking structure of the electrical junction box 100 will be described.
In the following description, “main fixing” means fixing the cover firmly to such an extent that it cannot be removed from the connection box body under normal use. “Temporary fixing” means that the connection box body can be easily artificially fixed. Although it can be removed, it means that the cover is fixed to the extent that it does not fall off the junction box body due to vibration during transportation. In addition, the “full lock state” means that the interior part is housed in the connection box body and a cover is attached to the connection box body. The “temporary lock state” means that the interior part is not housed in the connection box body. This means that the cover is attached to the junction box body in the state. The generic term “mainly locked state” and “temporarily locked state” may be referred to as “locked state”.

  1 and 2 are diagrams for explaining a locking structure of the electrical junction box 100. FIG. FIG. 1 shows the structure in the temporarily locked state, and FIG. 2 shows the structure in the fully locked state. 1 and 2 show a case where a substrate 130 is accommodated as an example of an interior part.

  The junction box body 110 of the electrical junction box 100 is formed in a substantially rectangular box shape that accommodates the substrate 130. A columnar substrate support portion 111 for supporting the substrate 130 is formed on the bottom wall 110 a of the junction box main body 110. A screw hole 111 a through which the screw 140 is inserted is formed at the center of the substrate support portion 111, whereby the substrate 130 is fixed to the connection box main body 110. Further, a lock hole 112 for mounting the case 120 is formed at the end of the bottom wall 110a of the junction box body 110. In the lock hole 112, a part of the lower end of the side wall 110b of the junction box body 110 is exposed.

  The cover 120 of the electrical junction box 100 is formed in a substantially rectangular shape that covers the substrate 130 accommodated in the junction box main body 110. This cover 320 is sized to fit inside the junction box body 110. A substantially cylindrical temporary locking fitting portion 121 is formed on the ceiling wall 120 a of the cover 120. The temporary engagement fitting portion 121 is disposed at a position corresponding to the substrate support portion 111 in a state where the cover 120 is aligned with the connection box main body 110. Further, the inner diameter of the temporary locking fitting portion 121 is formed to be substantially the same as or slightly smaller than the outer diameter of the substrate support portion 111.

  A plate-like lock arm 122 is formed at the lower end of the side wall 120b of the cover 120 so as to face downward. A lock claw 123 facing the outside of the cover 120 is formed at the lower end of the lock arm 122. Further, the cover 120 has a rib portion 124 formed continuously on the side wall 120 b and the lock arm 122 inside the cover 120. Here, the lock arm 122, the lock claw 123, and the rib portion 124 are positions that pass without being caught in the lock hole 112 when the substrate 130 is not accommodated, and the end portions of the substrate 130 when the substrate 13 is accommodated. Thus, the rib portion 124 is pushed and the lock arm 122 is formed at a position where it is bent to the outside of the cover 120. Further, the lock arm 122 is when the substrate 130 is accommodated, and the upper surface of the lock claw 123 is the lower end of the side wall 120b of the cover 120 when the lower end of the temporary engagement fitting portion 121 is attached to the upper surface of the substrate 130. It is formed with such a length as to be high.

  In the above configuration, the lock hole 112, the lock arm 122, the lock claw 123, and the rib portion 124 are included in the present fixing mechanism, and the substrate support portion 111 and the temporary locking fitting portion 121 are included in the temporary fixing mechanism. It is.

  Next, the temporary locking structure of the electrical connection box 100 will be described. In this case, as shown in FIG. 1, even if the cover 120 is attached to the junction box main body 110, the lock arm 123 does not bend, so the lock claw 123 does not engage with the lock hole 112. Therefore, the cover 120 is not permanently fixed. However, when attached to the junction box main body 110, the board support part 111 and the temporary locking fitting part 121 are fitted. As a result, slight deformation and friction occur in the substrate support part 111 and the temporary locking fitting part 121 molded with resin or the like. As a result, the cover 120 can be temporarily fixed.

  Furthermore, the height of the electrical connection box 100 in the temporarily locked state is the thickness of the ceiling wall 120a of the cover 120, the height of the temporarily locked fitting portion 121, except for the lock arm 122, the lock claw 123, and the rib portion 124. The height and the thickness of the bottom wall 110a of the junction box body 110 can be suppressed to a combined height. Thereby, a space required for transportation can be suppressed.

  Next, the main locking state of the electrical connection box 100 will be described. In this case, as shown in FIG. 2, in the state where the lower end of the temporary engagement fitting portion 121 is attached to the upper surface of the substrate 130, the height of the upper surface of the lock claw 123 is the height of the lower end of the side wall 120 b of the cover 120. Almost matches. Further, when the rib portion 124 is pushed at the end portion of the substrate 130, the lock arm 122 is slightly bent to the outside of the cover 120 (dotted line arrow in FIG. 2). As a result, the lock claw 124 engages with the lock hole 112, and the cover 120 is permanently fixed.

  That is, according to the electrical connection box 100 according to the present embodiment, the main locking state and the temporary locking state can be switched depending on the presence or absence of the interior parts without changing the alignment position of the cover with respect to the connection box body. Thus, this is not accidentally fixed in a state where the interior parts are not accommodated. In addition, according to the electrical connection box 100, since the cover is temporarily fixed even in the temporarily locked state as in the conventional case, the risk of the cover falling off from the connection box main body due to vibration generated during transportation is reduced. it can. Furthermore, since the size of the electrical junction box can be made smaller in the temporarily locked state than in the fully locked state, it is possible to reduce the cost of transportation and the like.

  Next, another electrical connection box 200 according to the present embodiment will be described. Here, differences from the electrical junction box 100 will be mainly described.

  Similar to the electrical junction box 100, the electrical junction box 200 includes a junction box main body 210 that accommodates the substrate 230 and a cover 220 that protects the substrate 230.

  3 and 4 are diagrams illustrating a locking structure of the electrical junction box 200. FIG. FIG. 3 shows the structure in the temporarily locked state, and FIG. 4 shows the structure in the fully locked state.

  In the electrical junction box 100, the lock arm 122 is continuously formed on the side wall 120 b of the cover 120, and the lock arm 122 and the cover 120 are in contact with the end of the substrate 130 inside the cover 120. The rib portion 124 was formed.

  On the other hand, in the electrical junction box 200, the lock arm 222 is directly formed on the ceiling wall 220 a inside the cover 220. The lock arm 222 is formed at a position where the lock arm 222 is pushed to the end of the substrate 230 and slightly bent outside the cover 220 when the substrate 230 is accommodated. The lock arm 222 is when the substrate 230 is not accommodated, and the lower end of the temporary locking fitting portion 221 (corresponding to the temporary locking fitting portion 121 of the electrical connection box 100) is attached to the upper surface of the substrate 230. In such a state, the upper surface of the lock claw 223 is formed so as to be the height of the lower end of the bottom wall 210 a of the junction box body 210. Further, in accordance with the arrangement of the lock arms 222 and the lock claws 223, the lock holes 212 are formed at positions and sizes through which the lock arms 222 and the lock claws 223 pass without being caught when the substrate 230 is not accommodated.

  In the case of the electrical connection box 200, the lock hole 212, the lock arm 222, and the lock claw 223 are included in the main fixing mechanism, and the substrate support portion 211 (corresponding to the substrate support portion 211 of the electrical connection box 100) and temporary engagement The stop fitting portion 221 is included in the temporary fixing mechanism.

  Next, the temporary locking body of the electrical connection box 200 will be described. In this case, as shown in FIG. 3, the lock claw 223 does not engage with the lock hole 212 and thus the cover 120 is not permanently fixed. However, since the board support portion 211 and the fitting portion 221 are fitted, the cover 220 is temporarily fixed. be able to. Further, the height of the electrical connection box 200 in the temporarily locked state is the thickness of the ceiling wall 220a of the cover 220, the height of the temporarily locked fitting portion 221 and the connection, except for the lock arm 222 and the lock claw 223. The thickness of the bottom wall 210a of the box body 210 can be suppressed to a combined height.

  Next, the main locking state of the electrical connection box 200 will be described. In this case, as shown in FIG. 4, when the lock arm 222 is pressed against the end of the substrate 230, the lock arm 222 slightly bends to the outside of the cover 220 (dotted arrow in FIG. 4). As a result, the lock claw 223 is engaged with the lock hole 212 and the cover 220 is permanently fixed.

  That is, the same effect as that of the electrical junction box 100 can be obtained by the electrical junction box 200. Furthermore, according to the electrical junction box 200, unlike the electrical junction box 100, it is not necessary to bend the cover itself with the substrate. For this reason, not only is the burden on the cover in the fully locked state small, but also the impact applied to the cover can be hardly transmitted to the interior parts such as the substrate. Further, since it is not necessary to form a rib portion on the side wall of the cover as in the electrical junction box 100, the structure of the side wall of the cover can be simplified.

[Second Embodiment]
In the electrical junction boxes 100 and 200 according to the first embodiment, both of the lock claws are engaged with the lock holes by the bending of the lock arms pushed by the interior parts, and the main connection state is reached. On the other hand, in 2nd Embodiment, the electrical connection box used as a final locking state in the state which the lock arm has not bent is demonstrated.

  Similar to the electrical junction box 100, the electrical junction box 300 includes a junction box main body 310 that accommodates the substrate 330 and a cover 320 that protects the substrate 330.

  5-7 is a figure explaining the latching structure of the electrical-connection box 300 which concerns on 2nd Embodiment. FIG. 5 shows the structure in the temporarily locked state, and FIG. 6 shows the structure in the fully locked state. Moreover, FIG. 7 is a figure explaining a mode that it will be in this locked state.

  The junction box body 310 of the electrical junction box 300 is formed in a substantially rectangular box shape that accommodates the substrate 330. A columnar substrate support portion 311 for supporting the substrate 330 is formed on the bottom wall 310 a of the junction box main body 310. A screw hole 311 a into which the screw 340 is fitted is formed at the center of the substrate support portion 311, whereby the substrate 330 is fixed to the connection portion main body 310. Further, a lock hole 312 is formed in the bottom wall 310 a of the junction box main body 310. The lock hole 312 is formed with a temporary fixing mechanism and a main fixing mechanism for attaching the cover 320 to the junction box main body 310, which will be described later.

  The cover 320 of the electrical junction box 300 is formed in a substantially rectangular shape that covers the substrate 330 accommodated in the junction box main body 310. The cover 320 is sized to fit inside the junction box main body 310. On the ceiling wall 320a of the cover 320, a plate-like lock arm 322 is formed facing downward. A substrate contact protrusion 322 a is formed on the lock arm 322 on the inner surface of the cover 320. The substrate contact protrusion 322 a is a portion that contacts the substrate 330 in the process of attaching the cover 320 to the connection box main body 310. Further, a lock claw 323 facing the inside of the cover 320 is formed at the lower end of the lock arm 322. Cylindrical temporary locking projections 325 are formed on both side surfaces of the lock claw 323.

  Here, the main fixing mechanism and the temporary fixing mechanism of the electric junction box 300 will be described with reference to FIG. FIG. 8A is a view of the lock claw 323 and the temporary locking projection 325 as viewed from below, and FIG. 8B is a view of the lock hole 312 as viewed from above. FIG. 8C is a perspective view of the lock arm 322, the lock claw 323, the temporary locking protrusion 325, and the lock hole 312.

  In the lock hole 312 of the electrical junction box 300, a temporary locking fitting portion 312a and a main locking engagement portion 312b are formed in order from the top. The temporary locking fitting portion 312a is divided into two parts, and each portion is formed in a concave shape at a position corresponding to the temporary locking protrusion 325 when the cover 320 is attached to the connection box main body 310. Yes. Further, the temporary engagement fitting portion 312a is formed at a position where the temporary engagement protrusion 325 does not hit in a state where the lock arm 322 is bent to the outside of the cover 320. Further, the width of the recess of the temporary locking fitting portion 312a is formed slightly narrower than the thickness of the temporary locking protrusion 325. The space between the two portions of the temporary locking projection 325 is formed wider than the width of the lock claw 323. On the other hand, the main locking engagement portion 312b is formed between the two portions of the temporary locking fitting portion 312a when viewed from above. Further, the final locking fitting portion 312b is arranged so that the lower surface thereof is at the height of the upper surface of the lock claw 323 when the temporary locking projection portion 325 is below the temporary locking fitting portion 312a. Has been.

  The substrate contact protrusion 322a is formed at the same height as the substrate 330 in a state where at least the temporary locking protrusion 325 is at the height of the temporary locking fitting portion 312a. However, the upper surface of the lock claw 323 is not formed at a position higher than the lower surface of the substrate 330 when the upper surface of the lock engagement portion 312b is at the lower surface.

  In the case of the electrical junction box 300 according to the present embodiment, the lock arm 322, the lock claw 323, and the main locking engagement portion 312b of the lock hole 312 include the main fixing mechanism, and the lock arm 322, the lock claw 323, and the temporary engagement mechanism. The temporary protrusion mechanism 325 and the temporary engagement fitting portion 312a of the lock hole 312 are included in the temporary fixing mechanism.

  Next, the temporarily locked state of the electrical connection box 300 will be described. In this case, as shown in FIG. 6, in the process of attaching the cover 320 to the connection box main body 310, the lock arm 322 and the lock claw 323 pass through the temporary engagement fitting portion 312 a and eventually the temporary engagement protrusion 325. Fits into the recess of the temporary locking fitting portion 312a. Since the width of the recess of the temporary locking fitting portion 312a is slightly narrower than the thickness of the temporary locking projection portion 325, the temporary locking fitting portion 312a and the temporary locking projection portion 325 are slightly deformed. And friction occurs. As a result, the cover 320 is temporarily fixed.

  Next, the main locking state of the electrical connection box 300 will be described. In this case, as shown in FIG. 7, in the process of attaching the cover 320 to the connection box main body 310, the substrate contact protrusion 322 a is pushed by the end of the substrate 330, and the lock arm 322 is slightly bent outside the cover 320. (Dotted arrow in FIG. 7). Therefore, the temporary locking projection 325 is disengaged from the position of the temporary locking fitting portion 312a. As a result, the temporary locking projection 325 does not fit into the recess of the temporary locking fitting portion 312a, and the lock claw 323 passes between the two portions of the temporary locking fitting portion 312a. Then, the cover 320 is further pressed so that the upper surface of the lock claw 323 is lowered to the height of the lower surface of the main engaging portion 312b. In this process, since the substrate contact protrusion 322a passes through the position of the substrate 330, the lock arm 322 is not bent, and the lock claw 323 is engaged with the main engagement portion 312b. As a result, the cover 320 is permanently fixed.

  That is, according to the electrical junction box 300 according to the present embodiment, the same effects as those of the electrical junction boxes 100 and 200 according to the first embodiment can be obtained. Furthermore, according to the electrical junction box 300, unlike the electrical junction boxes 100 and 200 according to the first embodiment, it is not necessary to bend the lock arm by the interior part after the main engagement state. The burden on the lock arm and interior parts can be reduced.

[Third Embodiment]
In the first and second embodiments, the locked state is made by providing a lock hole in the junction box body. On the other hand, in 3rd Embodiment, the electrical junction box which engages a lock claw with interior component itself is demonstrated.

  Similar to the electrical junction box 100, the electrical junction box 400 includes a junction box main body 410 that houses the substrate 430 and a cover 420 that protects the substrate 430.

  9-11 is a figure explaining the latching structure of the electrical junction box 400. FIG. FIG. 9 shows the structure in the temporarily locked state, and FIG. 10 shows the structure in the fully locked state. FIG. 11 is a plan view seen from the direction AA ′ in FIG. Note that the two-dot chain line shown in FIG. 9 indicates the accommodation position of the substrate 430.

  The substrate 430 has a rectangular hole 430a (hereinafter referred to as “substrate hole”) formed in the vicinity of the end.

  The junction box body 410 of the electrical junction box 400 is formed in a substantially rectangular box shape that accommodates the substrate 430. A columnar substrate support portion 411 for supporting the substrate 430 is formed on the bottom wall 410 a of the junction box body 410. A screw hole 411 a for inserting a screw 440 is formed in the center of the substrate support portion 411, whereby the substrate 430 is fixed to the connection portion main body 410. Further, the bottom wall 410a of the junction box body 410 is formed with a temporary locking fitting portion 413 disposed at a position corresponding to the board hole 430a when the board 430 is accommodated. A convex portion 413 a facing the outside of the cover 420 is formed at the upper end of the temporary locking fitting portion 413. The convex portion 413 a is formed at least above the lower surface of the substrate 430 when the substrate 430 is accommodated. Moreover, the convex part 413a is formed in the slope shape which hangs from the bottom to the top, and makes the center part a vertex.

  The cover 420 of the electrical junction box 400 is formed in a substantially rectangular shape that covers the substrate 430 accommodated in the connection portion main body 410. The side wall 420b of the cover 420 functions as a lock arm, and a lock claw 423 facing the inside of the cover 420 is formed at the lower end thereof. When the lower end of the side wall 420b of the cover 420 is attached to the bottom wall 410a of the connection box body 410, the upper surface of the lock claw 423 is lower than the lower end of the convex portion 413a of the temporary locking fitting portion 413. Further, it is formed so as to be almost the same height as the lower surface of the accommodated substrate 430. Further, the lock claw 423 has a length at least enough to enter the lower side of the convex portion 413a when the cover 420 is attached to the connection box main body 410.

  In the above configuration, the side wall 420b of the cover 420 that functions as a lock arm and the lock claw 423 are included in the present fixing mechanism, and the temporary engagement fitting portion 413, the side wall 420b of the cover 420, and the lock claw 423 are temporary. Included in the fixing mechanism.

  Next, the temporarily locked state of the electrical connection box 400 will be described. In this case, as shown in FIG. 9, in the process of attaching the cover 420 to the junction box body 410, the lock claw 423 slides on the slope above the convex portion 413a of the temporary locking projection 413, and the lower side of the convex portion 413a. to go into. Thereby, the lock claw 423 can be hooked on the convex portion 413a. However, since the lower side of the convex portion 413a of the temporary locking projection 413 is also formed in a slope shape, the cover 420 can be easily removed artificially. That is, the cover 420 can be temporarily fixed.

  Next, the main locking state of the electrical connection box 400 will be described. In this case, as shown in FIGS. 10 and 11, when the cover 420 is attached to the junction box body 410, the lock claw 423 enters under the substrate 430, and the lock claw 423 engages in the lateral region 430a of the substrate hole 430a. . As a result, the cover 430 is permanently fixed.

  That is, according to the electrical junction box 400 according to the present embodiment, the interior parts can be changed without changing the alignment position of the cover with respect to the junction box body, as in the electrical junction boxes 100 to 300 according to the first and second embodiments. Since the main locking state and the temporary locking state can be switched depending on the presence / absence, the main fixing is not mistakenly performed in a state in which the interior part is not accommodated as in the conventional case. In addition, according to the electrical connection box 400, since the cover is temporarily fixed even in the temporarily locked state as in the prior art, the risk of the cover falling off from the connection box main body due to vibration or the like generated during transportation is reduced. it can. Furthermore, according to the electrical junction box 400, unlike the electrical junction boxes 100 to 300, it is not necessary to have a configuration that hits the main locking engagement portion that is engaged with the lock claw. can do.

  Next, a locking structure of another electrical junction box 500 according to this embodiment will be described. Here, differences from the electrical junction box 400 will be mainly described.

  The electrical junction box 500 is an electrical junction box that accommodates a substrate having a notch (hereinafter referred to as “substrate notch”) formed at an end portion.

  Similar to the electrical junction box 400, the electrical junction box 500 includes a junction box main body 510 that houses the substrate 530 and a cover 520 that protects the substrate 530.

  12-14 is a figure explaining the latching structure of the electrical junction box 500. FIG. FIG. 12 shows the structure in the temporarily locked state, and FIG. 13 shows the structure in the fully locked state. FIG. 14 is a plan view seen from the BB ′ direction in FIG. Note that the two-dot chain line shown in FIG. 12 indicates the accommodation position of the substrate 530.

In the electrical junction box 500, unlike the electrical junction box 400, the width of the lock claw 523 is at least wider than the width of the substrate notch 530a. In the case of the electrical junction box 500, the side wall 520b of the cover 520 that functions as a lock arm and the lock claw 523 are included in this fixing mechanism, and the temporary locking fitting portion 513, the side wall 520b of the cover 520, and the lock claw 523 are included. Is included in the temporary fixing mechanism.
Next, the structure of the electrical connection box 500 in the fully locked state will be described.

  In the case of the electrical junction box 400, the lateral region 431 of the substrate hole 430 can be used as the engagement portion of the lock claw 423, but the region 431 does not exist on the substrate 530. However, even in this case, by making the width of the lock claw 523 wider than the substrate notch 531, the cover 520 is permanently fixed to the connection box main body 510 with the upper and lower regions 530 a of the substrate notch 531 as the engagement locations. Can do.

  In other words, the electrical connection box 500 can obtain the same effect as the electrical connection box 400 by increasing the width of the lock claw. The structure of the electrical connection box 500 in the temporarily locked state is the same as the structure of the electrical connection box 400 in the temporarily locked state, and thus the description thereof is omitted.

  Next, a locking structure for another electrical junction box 600 according to the present embodiment will be described. Here, differences from the electrical junction box 400 will be mainly described.

  FIG. 15 and FIG. 16 are diagrams for explaining a locking structure of the electrical junction box 600. FIG. 15 shows the structure in the temporarily locked state, and FIG. 16 shows the structure in the fully locked state. In addition, a two-dot chain line illustrated in FIG. 15 indicates the accommodation position of the substrate 630.

  This electrical junction box 600 is an electrical junction box that accommodates a substrate 630 in which no hole or notch is formed at the end.

  The junction box body 610 of the electrical junction box 600 is formed to be larger than the junction box body 500 by the side wall 610a. A temporary locking fitting recess 613 is formed inside the side wall 610b of the junction box body 610. The temporary locking fitting recess 613 has a shape corresponding to a temporary locking fitting protrusion 625 described later. Furthermore, a flexure groove 610c is formed along the connection location inside the connection location of the bottom wall 610a and the side wall 610b of the junction box body 610. By this bending groove 610c, the side wall 610b is easily bent to the outside of the junction box body.

  The side wall 620b of the cover 620 of the electrical junction box 600 is formed at a position where the outer side substantially contacts the inner side of the side wall 610b of the junction box body 610. Further, the side wall 620b of the cover 620 functions as a lock arm, and a lock claw 623 facing the inside of the cover 620 is formed at the lower end thereof. The lock claw 623 is formed so that the upper surface is substantially the same height as the lower surface of the accommodated substrate 630 when the lower end of the side wall 620b of the cover 620 is attached to the bottom surface 610a of the junction box body 610. . Further, a temporary engagement fitting convex portion 625 facing outward is formed on the side wall 620b of the cover 620. The temporary engagement fitting convex portion 625 is formed in a slope shape having a central portion as an apex from the bottom to the top. The temporary locking fitting convex portion 625 corresponds to the temporary locking fitting concave portion 613, and in the state where the lower end of the side wall 620 b of the cover 620 is attached to the bottom surface 610 a of the connection box body 610, It is formed at the height of the joint recess 613.

  In the case of the electrical junction box 600, the side wall 620b of the cover 620 that functions as a lock arm and the lock claw 623 are included in the present fixing mechanism, and the temporary locking fitting recess 613, the side wall 620b of the cover 620, and the temporary locking The fitting convex portion 625 is included in the temporary fixing mechanism.

  Next, the temporarily locked state of the electrical connection box 600 will be described. In this case, in the process of attaching the cover 620 to the connection box main body 610, the side wall 610b of the connection box main body 610 is pushed by the temporarily engaging fitting convex portion 625 of the cover 620 and bends outward. When the cover 620 is further pushed, the temporary locking fitting concave portion 613 of the connection box body 610 and the temporary locking fitting convex portion 625 of the cover 620 are fitted with each other as shown in FIG. As a result, the cover 620 is temporarily fixed to the junction box body 610.

  Next, the main locking state of the electrical connection box 600 will be described. Also in this case, when the cover 620 is pushed into the junction box body 610, the temporary locking projection 625 and the temporary locking fitting portion 612a are fitted on the outside of the cover 620 as in the temporary locking state. At the same time, inside the cover 620, the lock claw 623 enters the lower side of the end of the accommodated substrate 630, and the lock claw 623 engages with the substrate 630. As a result, the cover 620 is permanently fixed to the junction box body 620.

  In other words, the electrical junction box 600 can provide the same effects as those of the electrical junction boxes 400 and 500 by configuring a temporary fixing mechanism on the outside of the junction box body and the inside of the cover. Further, not only the machining of holes and notches in the interior parts is unnecessary, but the structure can be simplified because the temporary fixing mechanism is formed directly on the side wall of the connecting portion main body and the cover.

Next, a locking structure of another electrical connection box 700 according to the present embodiment will be described.
FIG. 17 is a cross-sectional view illustrating the structure of the electrical connection box 700 in the locked state (finally locked state).

  This electrical connection box 700 is a modification of the electrical connection box 400, and includes a connection box body 710 that houses the substrate 730 and a cover 720 that protects the substrate 730, as with the electrical connection box 400.

  In the case of the electrical junction box 400, in the process of attaching the cover 420 to the junction box body 410, the temporary latching protrusion 413 is bent after the side wall 420b of the cover 420 is bent by the end of the temporary latching protrusion 413 or the substrate 430. The lock claw 423 enters the lower side of the convex portion 413a. In this process, if the upper surface of the bottom wall 410a of the connection box body 410 is lower than the track drawn by the lock claw 423, the catch between the end of the connection box body 410 and the lock claw 423 can be reduced, and the fixed or Temporary fixing becomes easy.

  Therefore, in the electrical junction box 700, as shown by the dotted circle in FIG. 17, the end of the bottom 710a of the junction box body 710 is processed obliquely, and the lower end of the side wall 720b of the cover 720 is also adjusted accordingly. It is processed diagonally. By doing so, the bottom wall 710a of the connection box body 710 does not interfere with the track of the lock claw 723 in the process of attaching the cover 720 to the connection box body 710. As a result, compared to the electrical junction box 400, the main fixing or the temporary fixing is easier.

Next, a locking structure for another electrical junction box 800 according to the present embodiment will be described.
FIG. 18 is a diagram illustrating the structure of the electrical connection box 800 in a locked state (finally locked state).

  This electrical junction box 800 is also a modification of the electrical junction box 400, and includes a junction box main body 810 that accommodates the substrate 830 and a cover 820 that protects the substrate 830, similarly to the electrical junction box 400.

  In the case of the electrical connection box 400, in the temporarily locked state, the cover 420 is temporarily fixed by fitting only the lock claw 423 and the temporarily locked protrusion 413. Further, in the final locking state, the cover 420 is permanently fixed by engaging only the lock claw 423 and the substrate 430. However, if there are few fitting places or engagement places, there may be a problem in terms of durability.

  Therefore, in the electrical junction box 800, a step is formed at the end of the junction box body 810 and a step corresponding to the step is formed at the lower end of the side wall 820b of the cover 820, as shown by the dotted circle in FIG. . As a result, the step on the end of the bottom wall 810a of the junction box body 810 and the step on the side wall 820b of the cover 820 are fitted. Accordingly, in addition to the main fixing mechanism or the temporary fixing mechanism, the vertical and horizontal forces applied to the connection box main body 810 and the cover 820 can be dispersed, and the durability can be increased accordingly.

DESCRIPTION OF SYMBOLS 100 Electrical connection box 110 Connection box main body 111 Board | substrate support part 112 Lock hole 120 Cover 121 Temporary engagement fitting part 122 Lock arm 123 Lock claw 124 Rib part 130 Board | substrate 140 Screw 200 Electrical connection box 210 Connection box main body 220 Cover 221 Temporary engagement Stop fitting portion 222 Lock arm 223 Lock claw 230 Substrate 300 Electrical connection box 310 Connection box body 311 Substrate support portion 312 Lock hole 312a Temporary engagement fitting portion 312b Main engagement portion 320 Cover 322 Lock arm 322a Substrate contact protrusion Portion 323 Lock claw 325 Temporary locking projection 330 Substrate 340 Screw 400 Electrical connection box 410 Connection box body 411 Substrate support portion 413 Temporary locking projection 413a Projection 420 Cover 423 Locking claw 430 Substrate 431 Substrate hole 500 Electrical connection box 510 Connection box book 513 Temporary locking projection 513a Convex 520 Cover 523 Lock claw 530 Substrate 531 Substrate notch 600 Electrical connection box 610 Connection box main body 610c Deflection groove 613 Temporary engagement fitting recess 620 Cover 623 Lock claw 625 Temporary engagement fitting convex 630 Substrate 700 Electrical junction box 710 Junction box body 720 Cover 723 Lock claw 730 Substrate 800 Electrical junction box 810 Junction box body 820 Cover 830 Substrate

Claims (5)

An electrical junction box comprising a junction box body in which a substrate is accommodated, and a cover that is attached to the junction box body and protects the substrate,
In the case where the substrate is not accommodated in the connection box body, a temporary fixing mechanism that temporarily holds the connection box body and the cover,
An electrical connection box, comprising: a main fixing mechanism that restricts a part of movement by an end portion of the substrate to be in a final locking state when the substrate is accommodated in the connection box main body. The electrical junction box according to claim 1, wherein the temporary fixing mechanism has a structure in which the junction box main body and the cover are fitted. The main fixing mechanism includes a lock hole formed in the junction box body, a lock arm formed in the cover, and a lock claw formed at an end of the lock arm. 3. The electrical connection box according to claim 1, wherein, in a state where the lock arm is bent, the lock claw is engaged with the lock hole to be in the final locking state. The main fixing mechanism includes a lock hole formed in the junction box body, a lock arm formed in the cover, and a lock claw formed at an end of the lock arm, and the lock arm is bent. 3. The electrical junction box according to claim 1, wherein the lock claw is engaged with the lock hole to be in the final locked state in the absence of the lock. The main fixing mechanism includes a lock arm formed on the cover and a lock claw formed on an end portion of the lock arm, and the lock claw is engaged with the end portion of the substrate so that the main engagement state is established. The electrical junction box according to claim 1 or 2, characterized in that

Images