JP5482220B2 - Locking structure of mating member in electrical junction box - Google Patents

Description

  The present invention relates to an electric connection box used in an automobile, and particularly when a fitting member such as a connector or a cover is mounted on an electric component mounting portion formed in the electric connection box. The present invention relates to a lock structure that is held in a mounted state on a component mounting portion.

  An electrical junction box for automobiles such as a junction box is provided with an electrical component mounting portion on the outer surface thereof, on which various electrical components such as connectors, relays, and fuses of an external electric wire terminal are mounted. In addition, a cover may be attached to such an electric component mounting portion for the purpose of preventing intrusion of foreign matters in a situation where no electric component is mounted.

  By the way, it is necessary to securely attach the fitting members such as the electric component and the cover to the electric component mounting portion to prevent the dropping. On the other hand, in consideration of maintenance such as component replacement, the fitting member is also required to be easily removed from the electrical component mounting portion. In view of this, a releasable lock structure has been conventionally employed in the mounting portion of the fitting member to the electrical component mounting portion of the electrical junction box. For example, those described in JP-A-11-16635 (Patent Document 1) and JP-A-2001-155820 (Patent Document 2).

  Such a conventional lock structure is an inertia lock structure, and a lock piece having a locking portion is provided on the fitting member, and the lock piece is inserted when the fitting member is fitted into the electric component mounting portion. An abutting portion against which the locking portion abuts is provided in the electric component mounting portion. Then, the operator applies force and inserts the fitting member into the electrical component mounting portion with a large inertia force so as to get over the abutment portion and engage the abutment portion of the lock piece with the abutment portion. It has become.

  However, in such a conventional inertia lock structure, when releasing the lock, the operator must press and displace the lock piece from the side, so that there is a work space where at least fingers can enter the outside of the lock piece. Needed. For this reason, securing such work space has become a great barrier to improving the efficiency of mounting space for electrical components and the like on the outer surface of the electrical junction box.

  Particularly in recent years, with the increase in the number of electrical components, there is a large demand for higher density electrical junction boxes, so it may be necessary to reduce the work space around electrical components and the like in order to meet such demands. . Then, it becomes difficult to insert a finger into a narrow gap to release the lock, and there is a problem that deterioration of workability such as maintenance cannot be avoided.

Japanese Patent Laid-Open No. 11-16635 JP 2001-155820 A

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is that the surroundings required for unlocking when the fitting member mounted on the electric component mounting portion of the electric junction box is removed. It is an object of the present invention to provide a novel lock structure that can reduce the work space and can be easily unlocked.

A first aspect of the present invention is provided between an electrical component mounting portion formed in an electrical junction box and a fitting member fitted and mounted on the electrical component mounting portion, a releasable locking structure for holding the mounted state of the electric-component mounting portion, with which to extend out toward the front side in the fitting member from the rear end side of the mounting direction to the EC mounting unit A locking piece having a cantilever structure in which the front end portion located on the front end side is a free end is formed, and the engagement with the electric component mounting portion prevents the fitting member from being detached from the electric component mounting portion. A locking portion for inertia locking is provided on the front end side of the locking piece, which is the front end side in the mounting direction to the electrical component mounting portion, and the locking of the locking portion to the electrical component mounting portion is released the lock piece displacement direction and protrudes to the opposite side direction of mounting of the An operation projection a pressing force is applied from the person, characterized in that provided on the base end side of the rear end side of the mounting direction to the locking portion the electrical component mounting portion than in the locking piece It is characterized by a locking structure for a fitting member in an electrical junction box.

  According to the present invention, the front end side of the lock piece is locked by applying a pressing force toward the front end side in the extending direction of the lock piece (mounting direction of the fitting member) to the operation protrusion of the lock piece. A moment to deform and displace in the release direction can be exerted on the lock piece. Then, due to the bending deformation of the lock piece due to this moment, the locking of the engaging part of the lock piece to the electric component mounting part is released.

  In other words, according to the present invention, the lock can be released by applying a pressing force from the outside in the fitting direction of the fitting member to the operation protrusion of the lock piece. There is no need to provide a special space. Therefore, it is possible to arrange a plurality of electrical component mounting portions adjacent to each other, and the efficiency of arrangement space for electrical components and the like on the surface of the electrical junction box can be improved.

  The second aspect of the present invention is the lock structure according to the first aspect, wherein the lock piece projects from the rear end portion of the fitting member onto the outer peripheral surface and extends in an arc shape, A straight portion that extends linearly from the curved portion toward the front end side of the fitting member, and the operation projection is provided at a position close to the curved portion in the straight portion. It is.

  According to this aspect, since the connecting portion of the fitting member and the lock piece is a curved portion, on the base end side of the lock piece that becomes the point of action when a pressing force is applied to the operation protrusion. By avoiding local stress concentration, the durability of the lock piece can be improved. Further, the operating projection is provided at a position near the curved portion in the straight portion, that is, at a position slightly deviating from the base end portion where rigidity is increased and a sufficient arm length of the bending moment can be secured. Therefore, the amount of inward displacement of the distal end portion of the lock piece can be obtained efficiently and efficiently with respect to a small amount of pushing into the operating projection.

  According to a third aspect of the present invention, there is provided the lock structure according to the second aspect, wherein a rear end side of the fitting member on each of both sides in the circumferential direction sandwiching the lock piece on the outer peripheral surface of the fitting member. And a guide groove that guides the guide protrusion and guides the fitting member in the mounting direction in the electrical component mounting portion. .

  In this aspect, based on the guide action of the guide protrusion, the locking portion of the lock piece can be reliably and easily locked to the electrical component mounting portion when the fitting member is mounted. In addition, since the guide protrusions protruding from both sides of the lock piece can protect the lock piece, damage due to the foreign object hitting the lock piece with the fitting member removed can be avoided. The guide groove in the electric component mounting portion may be a bottomed groove that linearly extends in the mounting direction of the fitting member, or may be a bottomless groove formed by a slit formed in the wall portion. good.

  According to a fourth aspect of the present invention, in the lock structure according to any one of the first to third aspects, an end surface on the base end side of the lock piece in the operation protrusion is an extending direction of the lock piece. The operation surface has an inclined surface in which the protrusion height from the lock piece in the operation protrusion gradually decreases toward the tip end side of the lock piece. The projecting protrusion extends to the distal end side of the lock piece.

  In this aspect, the pressing operation surface formed on the base end side end surface of the operation protrusion may more efficiently apply the pressing force exerted from the outside in the mounting direction of the fitting member to the operation protrusion. I can do it. Moreover, the pressing force exerted on the operating projection is more efficiently applied to the distal end side of the lock piece by the portion extending toward the distal end side of the lock piece with an inclined surface on the distal end side of the operating projection. I can do it. Therefore, a large moment can be efficiently applied to the lock piece in the unlocking direction.

  According to a fifth aspect of the present invention, in the lock structure according to any one of the first to fourth aspects, the electrical component mounting portion is a female connector having a hood portion, and the fitting member is The female connector is inserted into the hood portion and is fitted and mounted.

  In this aspect, the hood portion that is a female connector is used, and the fitting member can be more stably and reliably fitted and mounted in a locked state. In particular, when such a hood portion is formed, the locking portion of the locking piece of the fitting member may be locked to the hood portion, or may be locked to a portion different from the hood portion. good. Further, such a locking piece may be positioned on the outer peripheral side across the hood portion, or may be positioned on the inner peripheral side of the hood portion.

  According to a sixth aspect of the present invention, in the lock structure according to the fifth aspect, the fitting member is a male connector provided at an external electric wire terminal.

  In this aspect, the present invention can be applied to a connection connector that removably connects an external electric wire to the internal energization member of the electrical junction box. In this aspect, in the state where the male connector is not connected, the cover having the structure according to the present invention provided with the lock piece can be used as the fitting member instead of the male connector.

  In the locking structure of the fitting member according to the present invention, by applying a pressing operation force from the outside in the fitting direction of the fitting member to the operation portion provided on the locking piece of the fitting member, The lock on the component mounting part can be released. Therefore, it is not necessary to provide a special space for unlocking work on the outer peripheral side of the fitting member, and the efficiency of mounting the electrical parts on the surface of the electrical junction box can be improved. In addition, since the unlocking operation of the fitting member with respect to the electric component mounting portion can be easily performed, workability such as maintenance that requires removal of the fitting member from the electric component mounting portion can be improved.

The perspective view which shows the state before the fitting of the electrical component mounting part and cover which were provided with the locking structure of the fitting member in the electrical junction box as 1st embodiment of this invention. The top view of the electrical component mounting part shown in FIG. III-III sectional drawing in FIG. 2 for demonstrating the state before fitting of the electrical component mounting part and cover shown in FIG. Sectional drawing corresponding to FIG. 3 for demonstrating the fitting state of the electrical component mounting part and cover shown in FIG. Sectional drawing corresponding to FIG. 4 for demonstrating operation which cancels | releases the fitting state of the electrical component mounting part and cover shown in FIG. Sectional drawing corresponding to FIG. 4 which shows the fitting state of the female connector provided with the locking structure of the fitting member in the electrical-connection box as 2nd embodiment of this invention, and a male connector.

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

  First, FIG. 1 shows an electric junction box 10 for an automobile provided with a lock structure as a first embodiment of the present invention. The electrical connection box 10 includes a box body 12 made of a synthetic resin hollow rectangular box. Such a box body 12 is formed by combining and fixing a lower case 14 and an upper case 16 each having a shallow open box shape on the opening side of each other. A bus bar circuit board and the like are accommodated to constitute an internal electric circuit.

  Various electrical component mounting portions 18 are formed on the upper wall portion of the upper case 16. These electrical component mounting portions 18 are configured to mount separate electrical components such as a fuse or a relay (not shown) or a connector provided on an external electric wire terminal. That is, each electrical component mounting portion 18 is provided with a connection terminal 20 connected to an internal electrical circuit so that these electrical components can be energized and connected.

  In addition to the electrical components, a cover 22 can be mounted on these electrical component mounting portions 18 as shown. The electrical component mounting portion 18 is protected by the cover 22 when no electrical component is mounted.

  In the present invention, the fitting member mounted on the electrical component mounting portion 18 includes such a cover 22 in addition to an electrical component such as a connector. And since these electrical components and the cover 22 are all mounted on the electrical component mounting portion 18, the shape of the mounting portion corresponds to the same, and the lock structure according to the present invention is also provided. . Therefore, in this embodiment, the cover 22 as a fitting member will be described.

  Specifically, as shown in FIGS. 2 and 3, one electrical component mounting portion 18a provided in the upper case 16 is a female connector. That is, a rectangular connection recess 24 is formed, and a plurality of connection terminals 20 that are respectively connected to an internal circuit protrude from the bottom surface of the connection recess 24. A hood portion 26 that protrudes from the surface of the upper case 16 is integrally formed in a substantially rectangular tube shape around the connection recess 24.

  Further, the upper case 16 has an engagement recess 28 formed in the outer peripheral side of the central portion of one long side portion 27 of the hood portion 26. The engaging recess 28 is formed along the outer peripheral surface of the hood portion 26 at substantially the same depth as the connection recess 24. Furthermore, an engaging protrusion 32 that protrudes inwardly on the outer wall surface 30 is formed inside the engaging recess 28. The engagement protrusion 32 constitutes a lock structure of the cover 22 described later.

  Further, guide grooves 34 and 34 are formed on both sides in the circumferential direction of the hood portion 26 with the engaging recess 28 interposed therebetween. Each of these guide grooves 34 extends linearly continuously from the bottom surface of the connection recess 24 to the protruding front end surface of the hood portion 26, and is open to the inner peripheral surfaces of the engagement recess 28 and the hood portion 26. It is a bottomed groove.

  On the other hand, as shown in FIGS. 1 and 3, the cover 22 mounted on the electrical component mounting portion 18a has a shape corresponding to a male connector corresponding to the electrical component mounting portion 18a, which is a female connector. It has.

  That is, the shape of the cover 22 exhibits a substantially rectangular block shape as a whole that fits into the fitting portion constituted by the connection recess 24 and the hood portion 26 of the electrical component mounting portion 18a. ing. However, in the present embodiment, a hollow structure is formed in which a plurality of hollow holes 36 that open toward the front end side in the fitting direction are formed, and when the cover 22 is fitted into the fitting portion, The connection terminal 20 is accommodated in the inside of the extraction hole 36. Further, a hook-like operation piece 38 protruding on the outer peripheral surface is integrally formed at the rear side end in the fitting direction. The operation piece 38 may be formed at least in part, but in the present embodiment, the operation piece 38 protrudes from one long side and both short sides.

  Furthermore, a lock piece 42 made of a synthetic resin projecting on the outer peripheral surface is integrally formed on one long side portion 40 of the cover 22 at a central portion in the side length direction. The lock piece 42 protrudes on the outer peripheral surface from the rear end side portion of the cover 22, and extends linearly toward the front end side of the cover 22 through a curved portion 44 extending in a circular arc shape of ¼ circumference. The cantilever structure is provided with a straight portion 46. The curved portion 44 and the straight portion 46 extend with a substantially constant width as a whole, and the straight portion 46 extends substantially parallel to the outer peripheral surface of the cover 22. The length of the lock piece 42 is adjusted so that the front end of the straight portion 46 is substantially the same as the front end of the cover 22 or does not reach slightly.

  A window-like engaging portion 48 for inertia lock is formed on the distal end side of the lock piece 42 of the present embodiment. The locking portion 48 is formed in the middle portion in the length direction of the lock piece 42 so as to penetrate in the thickness direction and extend in the length direction. The locking surface is formed by the end surface on the distal end side of the locking portion 48. 50 is configured. In the lock piece 42, it is desirable that the outer surface on the front end side with respect to the locking surface 50 be a tapered surface 52 that is inclined toward the outer peripheral surface side on the cover 22 side toward the front end. The outer surface on the front end side of the lock piece 42 is bent inwardly, that is, in a direction approaching the outer peripheral surface of the cover 22 when the engagement protrusion 32 is pressed when inserted into the engagement recess 28 during inertia lock. The engagement protrusion 32 slides on the outer surface of the lock piece 42 to reach the locking position. In order to smoothly slide the engaging protrusion 32, that is, to easily get over the engaging protrusion 32 at the front end side of the locking portion 42 of the lock piece 42, a tapered surface 52 is formed in the portion. .

  Further, the lock piece 42 is integrally formed with an operation protrusion 54 that protrudes on the outer surface at a position closer to the base end side than the locking portion 48 in the intermediate portion in the length direction. The operation protrusion 54 is provided in the length direction of the lock piece 42 in order to efficiently secure a stroke (deformation displacement) amount at the tip end portion (the engagement portion 48 to the engagement protrusion 32) of the lock piece 42. It is desirable that it be formed closer to the base end side than the intermediate portion. As a result, the amount of inward displacement of the distal end portion of the lock piece 42 can be greatly and efficiently obtained with respect to a small pushing amount. However, at the base end edge portion of the lock piece 42, the lock piece 42 has a large rigidity and may require a large operating force. Therefore, a position slightly away from the base end edge portion toward the front end side is desirable. In the present embodiment, the operation protrusion 54 is formed in the straight portion 46 in the vicinity of the bending portion 44.

  Further, the base end side end face of the lock piece 42 of the operation projection 54 is a pressing operation face 56 that spreads out in a plane perpendicular to the extending direction of the lock piece 42, and is outward in the mounting direction of the cover 22. The pressing force exerted from (upper side in FIG. 5) is efficiently exerted on the operation projection 54. On the other hand, the front end side of the lock protrusion 42 of the operation protrusion 54 is an inclined surface 58 inclined toward the outer peripheral surface side of the cover 22, and the operation protrusion 54 extends toward the front end side of the lock piece 42. The protrusion height extends gradually toward the distal end side of the lock piece 42 such that the protrusion height gradually decreases. Thereby, the pressing force exerted on the operation projection 54 is efficiently exerted on the distal end side of the lock piece 42.

  In addition, a pair of guide protrusions 60 and 60 are integrally formed on the outer peripheral surface of the cover 22 on both sides in the circumferential direction across the lock piece 42. The pair of guide protrusions 60, 60 are formed in a thin plate shape extending in parallel from the rear end side of the cover 22 toward the front end side.

  As shown in FIGS. 3 and 4, the cover 22 having such a lock piece 42 is, from its front end side, the hood portion 26 of the electrical component mounting portion 18 a formed in the electrical junction box 10. Is fitted and mounted. Thereby, the electrical component mounting portion 18a is covered and protected.

  Thereupon, when the cover 22 is fitted into the electrical component mounting portion 18a, the lock piece 42 is inserted into the engaging recess 28. Then, when the tapered surface 52 provided at the tip of the lock piece 42 comes into contact with the engagement protrusion 32 protruding from the inner surface of the engagement recess 28, the lock piece 42 gets over the engagement protrusion 32 due to the bending of the lock piece 42, When the lock piece 42 is elastically restored, the locking portion 48 of the lock piece 42 is fitted into the engagement protrusion 32. The cover 22 is locked to the electrical component mounting portion 18a so as not to be pulled out by the locking action of the locking surface 50 of the locking portion 48 and the engaging protrusion 32, and is held in the mounted state. By such an inertia lock mechanism, the lock structure of the fitting member according to the present embodiment is configured between the cover 22 and the electrical component mounting portion 18a.

  Further, when the cover 22 is fitted into the electric component mounting portion 18a, the pair of guide protrusions 60, 60 protruding from the cover 22 are fitted into the guide grooves 34, 34 of the electric component mounting portion 18a and guided. Therefore, the lock piece 42 is more stably guided to the locking position, and a sure locked state is stably expressed. The guide protrusion 60 prevents damage due to collision with other members of the lock piece 42.

  On the other hand, as shown in FIG. 5, in order to release the engagement of the lock piece 42 with respect to the engagement protrusion 32, outward (with respect to FIG. An external force pressing from the upper side (shown by the arrow) toward the tip side is exerted. Since the operating projection 54, which is the point of action of the external force, is displaced outward from the lock piece 42, a bending moment acts on the lock piece 42 with this deviation amount as the arm length. Due to this bending moment, the lock piece 42 is deformed and displaced in a direction in which the tip portion approaches the outer peripheral surface of the cover 22. Due to this deformation displacement, the locking portion 48 of the lock piece 42 is displaced in a direction away from the engaging protrusion 32, and the engagement between the locking portion 48 and the engaging protrusion 32 is released. As a result, the lock of the cover 22 with respect to the electric component mounting portion 18a is released. By pulling out the cover 22 in the unlocked state shown in FIG. 5, the cover 22 can be easily detached from the electrical component mounting portion 18a.

  The cover 22 and the electrical component mounting portion 18a provided with the lock mechanism having such a structure apply a pressing force to the operation protrusion 54 of the lock piece 42 from above in the mounting direction of the cover 22, A moment that deforms and displaces the distal end side of the lock piece 42 in the locking release direction can be exerted on the lock piece 42 to release the engagement of the lock piece 42 with the engagement protrusion 32. Therefore, it is not necessary to provide a special operation space on the outer peripheral side of the cover 22, and it is possible to arrange a plurality of electric component mounting portions 18 adjacent to each other. Improvement of installation space efficiency is achieved. Further, the cover 22 can be easily released from the locked state with the electrical component mounting portion 18a by a simple operation of applying a pressing force to the operation projection 54 from above.

  In particular, since the operation protrusion 54 is provided in the straight portion 46 of the lock piece 42 at a position close to the curved portion 44, the inward direction of the distal end portion of the lock piece 42 with respect to a small pushing amount. A large amount of displacement can be secured, and the unlocking operation can be performed more easily.

  In addition, the lock piece 42 is formed so as to protrude on the outer peripheral surface of the cover 22, while the engagement recess 28 in which the lock piece 42 is accommodated in the electrical component mounting portion 18 a is formed from the connection recess 24 and the hood portion 26. Therefore, the lock piece 42 can be formed with a high degree of design freedom without being restricted by the connection terminal 20 or the like disposed in the electrical component mounting portion 18a.

  Next, FIG. 6 shows a female connector 61 as an electric component mounting portion provided in an electric junction box 10 having a lock structure as a second embodiment of the present invention, and an external electric wire as a fitting member. A male connector 62 provided at the terminal is shown. In the following description, members and parts having the same structure as in the first embodiment are denoted by the same reference numerals as those in the first embodiment in the drawings, and the description thereof is omitted as appropriate. To do.

  The female connector 61 includes a connection recess 24 formed in the surface of the upper case 16 of the electrical connection box 10 and a hood portion 26 protruding from the connection recess 24 on the surface of the upper case 16. The fitting part is provided. The female connector 61 includes an engaging recess 28 formed on the outer peripheral side of one long side portion 27 of the hood portion 26 as in the above-described embodiment. An engagement protrusion 32 protruding inward is formed at 30.

  The male connector 62 includes a synthetic resin connector housing 64 having a substantially rectangular block shape corresponding to the fitting portion of the female connector 61. A plurality of terminal insertion holes 66 are formed in the connector housing 64 so as to open to an end surface (upper end surface in FIG. 6) on the rear end side in the mounting direction of the male connector 62. A female terminal 70 provided at the end of the external electric wire 68 is fitted and attached to each terminal insertion hole 66. Further, terminal insertion holes 72 through which the connection terminals 20 protruding from the bottom surface of the female connector 61 are inserted are formed in the bottom surfaces of the terminal insertion holes 66.

  Similarly to the above-described embodiment, one long side portion 40 of the connector housing 64 is integrally formed with a lock piece 42 that protrudes on the outer peripheral surface at the center portion in the side length direction. The lock piece 42 protrudes on the outer peripheral surface from the rear end portion of the connector housing 64, and extends straightly from the curved portion 44 extending in a circular arc shape of ¼ circumference toward the front end side of the connector housing 64. The curved portion 44 and the straight portion 46 extend with a substantially constant width dimension as a whole. The straight portion 46 extends substantially parallel to the outer peripheral surface of the connector housing 64, and has a length that does not slightly reach the front end portion of the connector housing 64.

  The male connector 62 having such a lock piece 42 is fitted and fitted to the female connector 61 formed in the electrical connection box 10 from the front end side. Thereby, the female terminal 70 provided on the male connector 62 and the connection terminal 20 protruding from the bottom surface of the female connector 61 are connected, and the external electric wire 68 is connected via the female terminal 70 and the connection terminal 20. The connection to the internal circuit of the electrical connection box 10 is conducted.

  When the male connector 62 is fitted into the female connector 61, the lock piece 42 is inserted into the engagement recess 28 and the elastic deformation of the lock piece 42 is used, as in the above embodiment. The locking portion 48 is fitted into the engaging protrusion 32. As a result, the male connector 62 is locked against the female connector 61 so that the male connector 62 cannot be pulled out by the locking action of the locking surface 50 of the locking portion 48 and the engaging protrusion 32 and is held in the mounted state. By such an inertia lock mechanism, the lock structure of the fitting member according to the present embodiment is configured between the male connector 62 and the female connector 61.

  Further, the engagement of the lock piece 42 with respect to the engagement protrusion 32 can be released by the same operation as in the above embodiment. That is, by applying an external force pressing from the outside (upper side in FIG. 6) toward the distal end side against the pressing operation surface 56 of the operation protrusion 54, the lock piece 42 with the operation protrusion 54 as an action point. A bending moment acts on. Due to this bending moment, the locking portion 48 of the locking piece 42 is displaced away from the engaging protrusion 32, that is, the outer peripheral surface side of the connector housing 64, and the engaging portion 48 and the engaging protrusion 32 are fitted. Is released. As a result, the lock of the male connector 62 with respect to the female connector 61 is released. In this unlocked state, the male connector 62 can be easily detached from the female connector 61 by pulling out the male connector 62.

  The male connector 62 and the female connector 61 provided with the lock mechanism having such a structure are mounted in the mounting direction of the male connector 62 with respect to the operation protrusion 54 of the lock piece 42 as in the above embodiment. By applying a pressing force from above, a moment that deforms and displaces the distal end side of the lock piece 42 in the unlocking direction is exerted on the lock piece 42 to release the engagement of the lock piece 42 with the engagement protrusion 32. Can do. Therefore, it is not necessary to provide a special operation space on the outer peripheral side of the male connector 62 attached to the female connector 61. Therefore, a plurality of female connectors 61 can be arranged adjacent to each other, and the efficiency of arrangement space for electric parts and the like on the surface of the electric junction box 10 is achieved. Further, the male connector 62 can be easily released from the locked state with the female connector 61 by a simple operation of applying a pressing force to the operation protrusion 54 from above. In addition, it goes without saying that the same effects can be obtained by the same configuration as in the above embodiment.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, in the above embodiment, the locking portion 48 provided on the lock piece 42 is a window-shaped recess, and the engagement protrusion 32 into which the recess of the locking portion 48 is fitted is a protrusion. However, the engaging portion 48 of the lock piece 42 has a convex shape, and the engaging concave portion into which the convex engaging portion 48 is fitted is provided in the electric component mounting portion 18 a and the engaging concave portion 28 of the female connector 61. It may be provided.

  Moreover, although the lock structure of this invention was demonstrated to the said embodiment in the example applied to the cover 22 and the male connector 62 which are inserted and fitted by the electrical component mounting part 18, this invention is, for example, a plurality of The present invention can be similarly applied to a fitting member such as a fuse cover that is fitted and attached to an electrical component mounting portion such as a fuse mounting portion.

10: Electrical connection box, 18: Electrical component mounting part, 22: Cover (fitting member), 26: Hood part, 34: Guide groove, 42: Lock piece, 44: Curved part, 46: Straight part, 48: Engagement Stop: 54: Projection for operation, 56: Pressing operation surface, 58: Inclined surface, 60: Guide projection, 61: Female connector, 62: Male connector (fitting member)

Claims (6)

Provided between the electrical component mounting portion formed in the electrical junction box and the fitting member fitted and mounted on the electrical component mounting portion, and the fitting member is put into the electrical component mounting portion. A releasable lock structure to hold,
Locking the together are extending out toward the front side from the rear end side of the mounting direction to the EC mounting portion in the fitting member, cantilevered front end portion positioned on the front side is a free end structure Forming a piece,
The inertia lock locking portion that prevents the fitting member from being detached from the electrical component mounting portion by locking to the electrical component mounting portion is the front end side in the mounting direction to the electrical component mounting portion. Provided on the tip side of the lock piece,
An operating protrusion that protrudes in the opposite direction to the displacement direction of the lock piece for releasing the lock of the lock part to the electric component mounting part and is applied with a pressing force from above in the mounting direction is provided on the lock piece. A locking structure for a fitting member in an electrical junction box, which is provided on the base end side which is the rear end side in the mounting direction to the electrical component mounting portion with respect to the locking portion.   A curved portion that protrudes from the rear end portion of the fitting member onto the outer peripheral surface and extends in an arc shape, and a straight portion that linearly extends from the curved portion toward the front end side of the fitting member. The locking structure for the fitting member in the electrical junction box according to claim 1, further comprising: the operation protrusion provided at a position near the curved portion in the straight portion.   On the outer peripheral surface of the fitting member, guide protrusions extending from the rear end side to the front end side of the fitting member are respectively formed on both sides in the circumferential direction with the lock piece interposed therebetween, and the electric component mounting portion The locking structure for a fitting member in an electrical junction box according to claim 2, wherein a guide groove is provided for guiding the guide protrusion to guide the fitting member in a mounting direction. While the base end side end surface of the lock piece in the operation protrusion is a pressing operation surface that spreads out in a plane perpendicular to the extending direction of the lock piece,
The operation protrusion has an inclined surface in which the protrusion height of the operation protrusion from the lock piece gradually decreases toward the front end side of the lock piece, and the operation protrusion extends to the front end side of the lock piece. The lock structure of the fitting member in the electrical junction box of any one of 1-3.   The electrical component mounting portion is a female connector having a hood portion, and the fitting member is inserted and fitted into the hood portion of the female connector. The lock structure of the fitting member in the electrical junction box of Claim 1.   The lock structure of the fitting member in the electrical junction box according to claim 5, wherein the fitting member is a male connector provided at an external electric wire terminal.

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