JP6684448B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electric connection box mounted on an automobile or the like, and more particularly to an electric connection box including a cylindrical holder provided with a slit for inserting a vertical bus bar.

  BACKGROUND ART Conventionally, electric connection boxes such as relay boxes and fuse boxes have been used in automobiles and the like for the purpose of improving the efficiency of electric wiring and improving maintainability. Electrical components such as relays and fuses, and current-carrying members such as bus bars are appropriately attached to the box body of the electrical connection box, and power from a battery or the like is supplied to in-vehicle electrical components or the like.

  By the way, in an electrical connection box to which a relatively large current is supplied, such as a relay box installed near the battery, the bus bar as an energizing member is also relatively wide. Therefore, in order to mount a wide bus bar while avoiding an increase in the size of the electrical junction box, as described in Japanese Patent Application Laid-Open No. 2013-21757 (Patent Document 1), an electrical connection such as a relay or a fuse is conventionally used. A vertical bus bar is used that is housed in a state perpendicular to the surface of the box body provided with the component mounting portion. In such a vertical bus bar, an electric component to be mounted in the electric component mounting portion is connected at a connecting portion provided at one end edge in the width direction, and at the connecting portion provided at the other end edge portion. It is adapted to be connected to a connecting component such as a connecting terminal provided at a terminal of an external electric wire accommodated in a cylindrical holder provided on the back surface of the box body.

  However, in order to connect the electric parts and the external electric wires by adopting such a vertical bus bar, a slit is provided on the peripheral wall of the cylindrical holder opening on the other surface (back surface) of the box body, and the slit is formed. It was necessary to insert a vertical bus bar from and to attach it to the box body. Therefore, the peripheral wall of the cylindrical holder may be divided in the circumferential direction by the slit, and the peripheral wall may be easily expanded by the connecting component, resulting in deterioration of fitting stability of the connecting component.

  Therefore, in Patent Document 1, it is proposed to surround the peripheral wall of the cylindrical holder with a holding member from the outside to prevent the peripheral wall from expanding. However, in the structure described in Patent Document 1, although the peripheral wall of the cylindrical holder can be prevented from expanding, since the peripheral wall is covered with the holding member from the outside, the visibility and handling of the peripheral wall protruding long deteriorate. However, there is an inherent problem that it is difficult to determine whether or not the connection component has reached the regular fitting position and is fitted, that is, whether or not the connection component is half-fitted.

JP, 2013-21757, A

  The present invention has been made in view of the above circumstances, and a problem to be solved is to reliably connect a connecting component to a vertical bus bar while preventing a peripheral wall of a cylindrical holder from being expanded by a holding member. It is to provide an electric junction box having a novel structure that can be used.

  According to a first aspect of the present invention, a cylindrical holder that is opened and projected on one surface of a box body and a slit for inserting a vertical bus bar provided on a peripheral wall of the cylindrical holder are inserted, The tubular holder includes a vertical bus bar housed and held inside the tubular holder, and a holding member having a tubular portion that is fitted onto the peripheral wall of the tubular holder to prevent the slit from expanding. In the electric connection box in which a connecting component that is electrically connected to the vertical bus bar is inserted from the opening end portion of the electric connection box and is fitted and held in the cylindrical holder, the holding member is the cylindrical holder. In a state of being externally fitted to the peripheral wall, a lock piece extending along the slit from the tubular portion, and a protruding portion of the lock piece, which is provided in a protruding end portion and is inserted through the slit, Has a locking claw that protrudes to the insertion area of the connecting component The lock claw abuts the connection component and the lock piece is elastically deformed, so that the insertion of the connection component into the tubular holder is allowed, and the elastic return of the lock piece causes the connection component to It is characterized in that the completion of insertion is detected.

  According to the present invention, the tubular portion provided on the holding member is externally fitted to the peripheral wall of the tubular holder. This prevents the slits from expanding when inserting the connecting component into the cylindrical holder with the holding member fitted onto the peripheral wall, so that the connecting component can be stably attached to the cylindrical holder. Can be inserted and fitted.

  Then, when the holding member is externally fitted to the peripheral wall, the lock claw abuts the connection component and the lock piece is elastically deformed, so that the connection component is allowed to be inserted into the cylindrical holder, and the elasticity of the lock piece is increased. The completion of insertion of the connecting parts is detected by the return. Therefore, it is possible to easily insert the cylindrical holder into the connecting component, and it is possible to sense the completion of insertion of the connecting component with a clear detent sensation due to the elastic return of the lock piece. It is also possible to easily detect the fitted state of the connected component.

  As described above, according to the present invention, the existing holding member and the slit of the tubular holder are effectively used to facilitate the detection of the fitting state of the connecting component without increasing the size, and to connect the connecting component to the vertical bus bar side. It is possible to surely prevent the occurrence of half-fitting by pushing into and making a conductive connection.

  Incidentally, the connection component may be any as long as it is electrically connected to the vertical bus bar, for example, a connection terminal itself crimped to the end of the external electric wire, or a connector in which such a connection terminal is housed and held in the housing. It may be.

  A second aspect of the present invention is the one described in the first aspect, wherein the holding member is a temporary locking position provided on the opening end side of the tubular holder, and the temporary locking position. It is possible to position at the main locking position provided on the side farther away from the base end side of the tubular holder than the above, and when the holding member is positioned at the temporary locking position, the lock claw is By inserting the connecting piece into the cylindrical holder by abutting against the connecting piece and elastically deforming the locking piece, the completion of insertion of the connecting piece is detected by elastic return of the locking piece. On the other hand, in the state where the holding member is positioned and fixed to the main locking position provided on the proximal end side with respect to the temporary locking position, the lock claw abuts on the connecting component. From the tubular holder of the connecting part One in which only out is adapted to be blocked.

  According to this aspect, the holding member is moved to the main locking position provided on the base end side of the tubular holder with respect to the temporary locking position and positioned and fixed. In the state where the holding member is positioned and fixed at the main locking position, the lock piece elastically returns, and the locking claw of the holding member projects toward the insertion region side of the connection component on the opening end side of the connection component. Therefore, even if the connection component moves in the pulling-out direction, the lock claw abuts on the connection component, so that the connection component is reliably prevented from coming off the tubular holder.

  Moreover, if the connecting component is inserted until the lock piece elastically returns, but it is in a semi-fitted state where it has not yet been completely fitted to the vertical bus bar, the main locking position is changed from the temporary locking position. When the holding member is moved to the stop position, the locking claws come into contact with the end faces of the connection component and the connection component can be pushed toward the vertical bus bar side. As a result, the occurrence of the half-fitted state can be more reliably prevented.

A third aspect of the present invention is the one described before Symbol second embodiment, the open end side of the peripheral wall of the tubular holder with locking projections are projected, the slits A locking projection is provided on the inner surface of the holding member, while a lower locking portion located on the base end side of the tubular holder and an upper engagement member located on the opening end side of the tubular holder. A retaining portion is provided, and the lower retaining portion of the retaining member engages with the retaining protrusion of the peripheral wall to position and retain the retaining member at the temporary retaining position, while the retaining member is provided. The locking piece of the holding member engages with the locking projection of the slit, and the upper locking portion of the holding member engages with the locking projection of the peripheral wall, so that the holding member becomes It is designed to be positioned and fixed at the stop position.

  According to this aspect, by providing the locking projection on the peripheral wall of the tubular holder, providing the locking projection on the inner surface of the slit, and providing the lower / upper engaging portion on the tubular portion of the holding member, The holding member can be easily and reliably positioned and held at the temporary locking position and the main locking position with respect to the cylindrical holder, and the compact and simple structure allows the holding member to move to the temporary locking position and the main locking position. Can be positioned.

  In a fourth aspect of the present invention according to any one of the first to third aspects, an upper surface of the lock claw is a tapered surface and a bottom surface of the lock claw is a horizontal surface. It is what

  According to this aspect, since the upper surface of the lock claw is a tapered surface, the connection component can be inserted into the tubular holder while the holding member is temporarily locked to the tubular holder, while the lock member is locked. Since the bottom surface of the claw is horizontal, it is possible to prevent the connecting component from coming out of the tubular holder when the holding member is fully engaged with the tubular holder.

  In a fifth aspect of the present invention according to any one of the first to fourth aspects, a pair of the slits are provided on the peripheral wall of the tubular holder, while the holding member is provided. Is provided with a pair of the lock pieces.

  According to this aspect, the pair of slits is provided on the peripheral wall of the tubular holder, while the pair of lock pieces is provided on the holding member. Accordingly, the holding member can be assembled in a well-balanced manner with respect to the peripheral wall of the tubular holder, so that the holding member can be stably fitted to the tubular holder.

  According to the present invention, since the tubular portion provided on the holding member is externally fitted to the peripheral wall of the tubular holder, the slit can be widened when the connecting component is inserted into the tubular holder. It can be prevented and inserted and fitted in a stable state. Then, the lock claws come into contact with the connection component and the lock piece is elastically deformed, so that the connection component is allowed to be inserted into the cylindrical holder, and the elastic return of the lock piece makes it clear that the insertion of the connection component is completed. It is possible to detect with a moderation feeling, and it is possible to easily detect the fitting state of the connection component which is deteriorated due to the attachment of the holding member. As described above, according to the present invention, the existing holding member and the slit of the tubular holder are effectively used to facilitate the detection of the fitting state of the connecting component without increasing the size, and to connect the connecting component to the vertical bus bar side. It is possible to reliably prevent the occurrence of half-fitting by pushing into.

The exploded perspective view showing the electric junction box as one embodiment of the present invention. The perspective view which shows the state by which the holding member was arrange | positioned with respect to the cylindrical holder of the box main body shown in FIG. The whole perspective view which shows the assembly state of the box main body of this embodiment. The top view which shows the box main body and holding member of this embodiment. FIG. 4 is an enlarged view of a main part of a VV cross section in FIG. 4 ((a) a view corresponding to FIG. 1, (b) a view corresponding to FIG. 2, and (c) and (b) showing a state in which a connecting component is inserted). , (D) a diagram corresponding to FIG. 3). An enlarged view of a main part of a VI-VI cross section in FIG. 4 ((a) a view corresponding to FIG. 1, (b) a view corresponding to FIG. 2, and (c) and (b) showing a state in which a connecting component is inserted) , (D) a diagram corresponding to FIG. 3). It is a disassembled perspective view which shows another aspect of the connection component of this embodiment, and is a figure equivalent to FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 6 show an electric junction box 10 as an embodiment of the present invention. The electrical junction box 10 is configured by assembling the box body 12 and the first case and the second case (not shown) that are stacked from both sides in the vertical direction of the box body 12. In the following description, the upper side means the upper side in FIGS. 1 to 3 and FIGS. 5 to 6, the lower side means the lower side in FIGS. 1 to 3 and FIGS. 5 to 6, and the front side means the lower side in FIG. The right side and the rear side in the figure mean the left side in FIG. 4, the longitudinal direction means the vertical direction in FIG. 4, and the width direction means the horizontal direction in FIG.

  As shown in FIGS. 1 to 4, the box body 12 has a rectangular block shape as a whole, and is made of an insulating synthetic resin such as polypropylene (PP) or polyamide (PA) by injection molding or the like. It is integrally formed. More specifically, the upper surface 14 which is one surface of the box body 12 is provided with cylindrical holders 16a and 16b which are open to the upper surface 14 and project upward in a substantially rectangular tube shape. The vertical bus bars 22a to 22c (see FIG. 4) are housed and held in the cylindrical holders 16a and 16b by inserting the slits 20 provided in the peripheral walls 18a and 18b of the cylindrical holders 16a and 16b by a lock structure (not shown). It is like this. Each of the vertical bus bars 22a to 22c is a plate formed by punching a conductive metal plate or the like, and has a lower end portion protruding from a plurality of connecting terminals formed of tuning fork terminals (not shown). The connection terminal is arranged in a fuse mounting portion or a relay mounting portion (not shown) which is opened on the lower surface which is the other surface of the box body 12, so that the fuse and the relay mounted in the mounting portion are predetermined. The external voltage of is supplied. On the other hand, the upper end portion 24 of each of the vertical bus bars 22a to 22c has a connection terminal 28, which is a connecting component, inserted from the opening end portion 26 of the cylindrical holder 16a, 16b and fitted and held in the cylindrical holder 16a, 16b. Thus, the connection terminal 28 is electrically connected (see FIG. 6). As a result, a predetermined external voltage is supplied to the vertical bus bars 22a to 22c. In addition, in FIG. 5 and FIG. 6, the connection terminals 28 are illustrated by imaginary lines for easy understanding.

  Each of the cylindrical holders 16a and 16b is formed so as to project upward from the upper surface 14 which is one surface of the box body 12 in a substantially rectangular tubular shape, and to open upward. The cylindrical holders 16a and 16b differ from each other only in the number of the slits 20 provided in the peripheral walls 18a and 18b. Therefore, in the following description, the cylindrical holders 16a (particularly, a substantially central portion of the upper surface 14 of the box body 12 is projected). The cylindrical holder 16a) provided will be described as an example. The cylindrical holder 16a is provided with a pair of slits 20, 20 each having a substantially rectangular cutout shape extending from the opening end 26 of the cylindrical holder 16a to a substantially central portion in the projecting direction at a position opposed to the longitudinal direction of the peripheral wall 18a. Has been done. In addition, the bottom surface 30 that is the inner surface of the slit 20 is formed by the bottom surface 30 that is the inner surface of the slit 20 and the portion sandwiched between the upper surface 14 of the box body 12 that projects outward in the longitudinal direction and then projects upward. A locking protrusion 32 is formed to face 30 with a substantially L-shaped cross-sectional shape (see FIGS. 1 to 3 and 5). Further, as shown in FIGS. 4 to 6, at the four corners of the inner surface 34 of the cylindrical holder 16a, a substantially rectangular cross section is formed upward from the upper surface 14 of the box body 12 which is a bottom surface of the inner surface 34 of the cylindrical holder 16a. A connection terminal locking projection 36 is formed that projects in a shape and engages and holds the connection portion 72 of the connection terminal 28 at a main locking position described later. In addition, as shown in FIG. 6, of the peripheral wall 18a of the cylindrical holder 16a, the peripheral wall 18a in which the slit 20 is not formed has a substantially rectangular cross-section toward the opening end 26 side. A pair of projecting locking projections 38, 38 are provided, and an upper surface 40 of the locking projection 38 is a tapered surface that is inclined downward toward the outside, while a bottom surface 42 of the locking projection 38 is formed. It is considered to be horizontal. As a result, the tubular portion 46a of the holding member 48a, which will be described later, can be easily moved from the temporary locking position to the main locking position smoothly and can be stably held at the main locking position. . Further, a pair of metal lance engagement protrusions 44, 44 projecting inward are provided in the vertical central portion of the inner surface 34 of the peripheral wall 18a of the cylindrical holder 16a in which the slit 20 is not formed. The metal lance engaging protrusion 44 also has a tapered upper surface which is inclined downward inward and a horizontal bottom surface, so that the metal lance 76 provided on the connection terminal 28 described later smoothly engages. It can be inserted up to the mating position and can be stably held in the engaging position.

  In addition, the box body 12 is, as shown in FIGS. 1 to 6, a tubular portion 46a that is fitted onto the peripheral walls 18a and 18b of the tubular holders 16a and 16b to prevent the slit 20 from expanding. , B are made of synthetic resin holding members 48a, 48b. In the following description as well, the tubular holder 16a that projects from the center of the upper surface 14 of the box body 12 will be taken as an example to proceed with the discussion. The tubular portion 46a, which constitutes the holding member 48a attached to the tubular holder 16a, has a substantially rectangular tubular shape, and the upper end portion and the lower end portion of the first surface portion (front side in FIG. 1) of the peripheral wall 50. Is cut out into a substantially rectangular shape to form a narrow wall portion 52, and an upper locking portion 54 is formed by the upper end surface of the narrow wall portion 52, while the lower portion of the narrow wall portion 52 is A lower locking portion 56 is formed by the end surface (see FIGS. 1 and 6). That is, as shown in FIG. 3, in the holding member 48a, in the main locking state, the lower locking portion 56 of the tubular portion 46a is positioned at the base end side of the tubular holder 16a, and the tubular member The upper locking portion 54 of the cylindrical portion 46a is provided so as to be positioned on the open end 26 side of the cylindrical holder 16a. On the other hand, of the peripheral wall 50 of the tubular portion 46a, the second and third surface portions (both sides in the longitudinal direction in FIG. 1) extending orthogonally from both ends of the first surface portion on which the narrow wall portion 52 is not formed are A pair of lock pieces 60, 60 extending downward from the open end portion 58 over the lower end portion in a substantially rectangular shape are provided (see FIGS. 1 and 5). In addition, a lock claw 62 that projects inward is provided at the protruding end of the lock piece 60, and an upper surface 64 of the lock claw 62 is a tapered surface that inclines downward inward. On the other hand, the bottom surface 66 of the lock claw 62 is a horizontal surface (see FIG. 5).

  By using the box main body 12 and the holding member 48a having such a configuration, the holding member 48a prevents the peripheral wall 18a of the cylindrical holder 16a of the box main body 12 from expanding and the connection terminal 28 to the vertical bus bar 22a. It is possible to provide the electric connection box 10 that can be surely electrically connected. More specifically, as shown in FIGS. 1 and 5 to 6, the connection terminal 28 includes a crimp portion 70 that is conductively connected to a core wire (not shown) exposed at the end of the external electric wire 68, and the crimp portion 70. Is provided with a substantially rectangular box-shaped connecting portion 72 connected to the. Further, the connecting portion 72 is provided with a pair of elastic contact pieces 74, 74 projecting from the tip end portion thereof, while a pair of substantially rectangular flat plate-like metal members projecting outward from the central portion toward the obliquely proximal end side. Lances 76, 76 are provided. The connection terminal 28 can be formed, for example, by bending using a plate formed by punching a conductive metal plate.

  With respect to the cylindrical holder 16a of the box body 12 having such a configuration, the holding member with the pair of lock pieces 60, 60 facing downward and the lock claws 62 of the lock piece 60 positioned in the corresponding slits 20. 48a is slid and inserted from the opening end 26 side, and positioned and arranged at the temporary locking position. More specifically, the lower locking portion 56 of the tubular portion 46a of the holding member 48a is engaged with the upper surface 40 of the locking projection 38 provided on the peripheral wall 18a of the tubular holder 16a, so that the holding member 48a is temporarily moved. It is in a state of being positioned and held at the locking position (see FIGS. 2 and 5 to 6B). When the connecting terminal 28 is inserted into the opening end 26 of the cylindrical holder 16a from the connecting portion 72 side in the state where the holding member 48a is positioned and held at the temporary locking position in this way, the state shown in FIGS. As can be seen, the tip of the connecting portion 72 of the connecting terminal 28 comes into contact with the upper surface 64 of the lock claw 62 of the holding member 48a, whereby the pair of lock pieces 60, 60 are elastically deformed outward. ing. That is, in the state in which the tubular portion 46a of the holding member 48a is externally fitted to the peripheral wall 18a of the tubular holder 16a, the pair of lock pieces 60, 60 extend from the tubular portion 46a along the slit 20 and inside the slit 20. On the other hand, the lock claw 62 provided on the projecting end portion of the lock piece 60 is inserted into the slit 20 and protrudes to the insertion region of the connection terminal 28 in the peripheral wall 18a of the cylindrical holder 16a. It has been done. Therefore, when the connecting terminal 28 is inserted into the open end 26 of the cylindrical holder 16a from the connecting portion 72 side, the tip of the connecting portion 72 comes into contact with the upper surface 64 of the lock claw 62 of the holding member 48a. ing. Since the upper surface 64 of the lock claw 62 is a tapered surface that inclines downward inward, the pair of lock pieces 60, 60 are elastically deformed outward, and the tubular shape of the connection terminal 28 is formed. Further insertion into the holder 16a is allowed. Then, when the lock claw 62 gets over the base end portion of the connection portion 72 of the connection terminal 28, the pair of lock pieces 60, 60 elastically return to move the connection portion 72 of the connection terminal 28 into the cylindrical holder 16a. The completion of insertion is detected (see FIG. 5 (c)).

  By the way, in the case where the connecting portion 72 of the connecting terminal 28 is not sufficiently inserted into the cylindrical holder 16a as shown in FIGS. 5C and 6C, FIG. As shown, there is a case where the vertical bus bar 22a is not sandwiched between the pair of elastic contact pieces 74, 74 of the connection portion 72 with a sufficient contact area and is in a semi-fitted state. Therefore, as shown in FIGS. 5D and 6D, by pushing the holding member 48a further downward and positioning the holding member 48a in the main locking position, the half-fitted state is eliminated. You can do it. More specifically, the holding member 48a is pushed until the bottom surface 66 of the lock claw 62, which is the tip of the pair of lock pieces 60, 60, engages with the locking projection 32 formed on the bottom surface 30 of the slit 20. . As a result, the upper locking portion 54 of the holding member 48a is engaged with the bottom surface 42 of the locking projection 38 provided on the peripheral wall 18a of the cylindrical holder 16a, and the holding member 48a is positioned and fixed in the main locking position. It is like this. Moreover, at the time of such work, the bottom surface 66 of the lock claw 62, which is the tip of the pair of lock pieces 60, 60, is brought into contact with the base end portion of the connection portion 72 of the connection terminal 28, so that the connection portion 72 is also pushed in at the same time. From the above, the tip of the connecting portion 72 of the connecting terminal 28 is engaged with the connecting terminal locking projection 36 formed in the cylindrical holder 16a (see FIGS. 5D and 6D), and A pair of metal lances 76, 76 provided on the connection portion 72 of the 28 engages with a pair of metal lance engagement protrusions 44, 44 provided in the cylindrical holder 16a. Therefore, the connection terminal 28 can be stably held in a desired fitting state in which the vertical bus bar 22a is sufficiently sandwiched between the pair of elastic contact pieces 74, 74 of the connection portion 72 (Fig. 5 (d) and FIG. 6 (d)).

  As described above, the holding member 48a is positioned and held at the temporary locking position by being engaged with the upper surface 40 provided on the opening end 26 side of the locking projection 38 formed on the cylindrical holder 16a. On the other hand, the bottom surface of the locking projection 38 provided on the side separated from the temporary locking position to the base end side (lower side in FIGS. 1 to 3 and FIGS. 5 to 6) of the tubular holder 16a. By engaging with 42, it is possible to position the main locking position. Moreover, when the holding member 48a is positioned and fixed at the main locking position provided on the base end side of the temporary locking position, the upper locking portion 54 of the holding member 48a serves as the horizontal surface of the locking projection 38. By engaging the bottom surface 42, the holding member 48a is prevented from coming out of the cylindrical holder 16a. Therefore, the connecting portion 72 of the connecting terminal 28 comes into contact with the bottom surface 66 of the lock claw 62 of the holding member 48a, which is prevented from coming out, which is a horizontal surface, so that the cylindrical holder 16a is connected to the connecting terminal 28 as well. It is designed to prevent people from coming out from within.

  According to the electrical junction box 10 having such a structure, the connection terminal 28 is allowed to be inserted into the cylindrical holder 16a in a state where the holding member 48a is positioned and arranged at the temporary locking position, and the holding member is held. When the connecting terminal 28 contacts the bottom surface 66 of the lock claw 62 in a state where the connecting terminal 28 is pushed downward and positioned at the main locking position, the connecting terminal 28 is prevented from coming out of the cylindrical holder 16a. It has become so. That is, when the connection terminal 28 is inserted into the cylindrical holder 16a, the cylindrical portion 46a provided on the holding member 48a is always fitted onto the peripheral wall 18a of the cylindrical holder 16a. Therefore, since the slit 20 is always prevented from expanding when the connecting terminal 28 is inserted into the cylindrical holder 16a, the connecting portion 72 of the connecting terminal 28 can be connected to the cylindrical holder 16a in a stable state. It is possible to insert and fit inside.

  Further, the completion of the insertion of the connecting portion 72 of the connection terminal 28 into the cylindrical holder 16a can be sensed by the elastic return of the pair of lock pieces 60, 60, and thus the completion of the insertion can be sensed with a clear sense of moderation. In addition, it is possible to easily detect the fitting state of the connection terminal 28 that has deteriorated due to the attachment of the holding member 48a. Further, by pushing the holding member 48a from the temporary locking position to the main locking position, even if the amount of pushing of the connecting terminal 28 to the vertical bus bar 22a side is insufficient, the connecting portion 72 of the connecting terminal 28 is pushed vertically. The connection terminal 28 can be surely electrically connected to the vertical bus bar 22a by being pushed into the bus bar 22a. As a result, it is possible to reliably prevent the half-fitting between the connection terminal 28 and the vertical bus bar 22a.

  In addition, in the state where the holding member 48a is positioned and arranged at the main locking position, the lock piece 60 is elastically returned and the lock claw 62 is projected to the insertion area of the connection terminal 28 in the cylindrical holder 16a. Therefore, even if a force is applied to the connecting terminal 28 in the pulling-out direction, the connecting portion 72 contacts the bottom surface 66 which is the horizontal surface of the lock claw 62, so that the connecting terminal 28 is reliably prevented from coming out of the cylindrical holder 16a. It is like this. Moreover, a locking projection 32 that is opposed to the bottom surface 30 that is the inner surface of the slit 20 in a substantially L-shaped cross-section is formed. As shown in FIG. 5D, the tip of the locking projection 32 is formed. Is located on the outer peripheral side of the lock piece 60 to cover the lock piece 60, the outward bending deformation of the lock piece 60 is also prevented, and the connection terminal 28 is more reliably prevented from coming off. ing. Further, the locking projection 38 is provided on the peripheral wall 18a of the cylindrical holder 16a, and the locking projection 32 is provided on the bottom surface 30 of the slit 20 of the cylindrical holder 16a, while the locking projection 32 is provided above the cylindrical portion 46a of the holding member 48a. The locking portion 54 and the lower locking portion 56 are provided. With such a compact and simple structure, the holding member 48a can be easily and reliably positioned and held with respect to the cylindrical holder 16a at the temporary locking position and the main locking position. That is, by engaging the lower locking portion 56 of the holding member 48a with the upper surface of the locking projection 38 of the cylindrical holder 16a, the holding member 48a can be positioned and held in the temporary locking position while the holding member 48a is held. By engaging the upper locking portion 54 of the 48a with the lower surface of the locking projection 38 of the cylindrical holder 16a, the holding member 48a can be positioned and held at the main locking position.

  In the present embodiment, the cylindrical holder 16a and the holding member 48a mounted and used for the cylindrical holder 16a have been described as an example, but the cylindrical holder 16b and the holding member 48b mounted and used for the cylindrical holder 16b are provided. Since the number of the slits 20 and the lock pieces 60 is one instead of two, and the assembling work and effects are the same, the description thereof will be omitted.

  Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the specific description. For example, in the above-described embodiment, the connection terminal 28 crimped to the end of the external electric wire 68 has been described as an example of the connection component, but the connection component may be conductively connected to the vertical bus bars 22a to 22c. Any of them may be used, and as shown in FIG. 7, for example, the connection terminal 28 may be a connector 80 housed and held in the housing 78. Further, in the present embodiment, the two types of cylindrical holders 16a and 16b and the two types of holding members 48a and b corresponding thereto are used, but one type of cylindrical holder 16a and one type of holding corresponding thereto. Even if only the member 48a is used, similar assembling work and effects can be obtained. Therefore, it is possible to simplify the design and reduce the cost. Further, by providing the locking projection 38 on the peripheral wall 18a of the cylindrical holder 16a and providing the upper locking portion 54 and the lower locking portion 56 on the cylindrical portion 46a of the holding member 48a, the temporary locking position can be obtained. Although the main locking position is clarified, it is not always necessary to clarify it, and thus the locking projection 38 and the upper / lower locking portions 54 and 56 may be omitted. That is, even if the locking projection 38 and the upper / lower locking portions 54 and 5 are not provided, the peripheral walls 18a and 18b of the cylindrical holders 16a and 16b are fitted by the holding members 48a and 48b so that the slit 20 is expanded. The vertical bus bars 22a to 22c of the connection terminals 28 are simply pushed in after the connection terminals 28 are inserted into the cylindrical holders 16a, 16b to which the holding members 48a, b are fitted. It is possible to eliminate the half-fitted state with respect to. In addition, since the holding member 48a positioned and fixed at the main locking position prevents the connection terminal 28 from coming out of the tubular holder 16a, the tubular holder of the connection terminal 28 is prevented. The metal lance 76 of the connection terminal 28, which is provided to prevent the connection terminal 28 from coming out from the inside of the 16a, may be omitted. Thereby, the connection terminal 28 can be simplified and the cost can be reduced.

  Further, the provisional locking position is not essential at the mounting position of the holding members 48a and 48b, and the locking piece 60 can be elastically deformed in the state where the holding member 48a, 48b is mounted at the main locking position until the locking piece 60 elastically returns the connecting component. The vertical bus bars 22a to 22c and the connecting parts may be completely fitted by pushing.

10: electric connection box, 12: box body, 14: upper surface (one surface), 16a, b: cylindrical holder, 18a, b: peripheral wall, 20: slit, 22a-c: vertical bus bar, 26: open end , 28: connection terminals (connection parts), 30: bottom surface (inner surface), 32: locking projections, 38: locking projections, 46a, b: tubular portions, 48a, b: holding members, 54: upper locking Part, 56: lower locking part, 60: locking piece, 62: locking claw, 64: top surface, 66: bottom surface, 80: connector (connecting component)

Claims (5)

A cylindrical holder that is opened and projected on one surface of the box body,
A vertical bus bar inserted through a slit for inserting a vertical bus bar provided on the peripheral wall of the cylindrical holder, and housed and held inside the cylindrical holder,
A holding member having a tubular portion that is fitted onto the peripheral wall of the tubular holder to prevent the slit from expanding.
In an electric connection box adapted to be inserted and connected from the opening end of the tubular holder to the vertical bus bar so as to be fitted and held in the tubular holder,
A lock piece extending along the slit from the tubular portion in a state in which the holding member is externally fitted to the peripheral wall of the tubular holder, and the slit provided on the protruding end portion of the lock piece. Has a lock claw that penetrates through and projects to the insertion area of the connection component in the peripheral wall,
The lock claw abuts the connection component and the lock piece is elastically deformed, so that the connection component is allowed to be inserted into the tubular holder, and the elastic return of the lock piece completes the insertion of the connection component. An electrical junction box, which is characterized in that A main member in which the holding member is provided on a temporary locking position provided on the opening end side of the tubular holder and on a side separated from the temporary locking position on the proximal side of the tubular holder. It is possible to position at the stop position,
In the state where the holding member is positioned at the temporary locking position, the lock claw abuts the connection component and the lock piece is elastically deformed, so that the connection component can be inserted into the tubular holder. Allowed, the completion of insertion of the connecting component is detected by elastic return of the lock piece,
In a state where the holding member is positioned and fixed to the main locking position provided on the proximal end side with respect to the temporary locking position, the lock claw abuts on the connecting component and the cylinder of the connecting component. The electric connection box according to claim 1, wherein the electric connection box is configured to be prevented from coming out from the holder. A locking projection is provided on the opening end side of the peripheral wall of the cylindrical holder, and a locking projection is provided on the inner surface of the slit.
The tubular portion of the holding member is provided with a lower engaging portion located on the base end side of the tubular holder and an upper engaging portion located on the opening end side,
While the lower locking portion of the holding member engages with the locking projection of the peripheral wall, the holding member is positioned and held at the temporary locking position,
When the lock piece of the holding member engages with the locking protrusion of the slit, and the upper locking portion of the holding member engages with the locking protrusion of the peripheral wall, the holding member becomes The electrical junction box according to claim 2 , wherein the electrical junction box is positioned and fixed at the main locking position.   The electrical junction box according to claim 1, wherein an upper surface of the lock claw is a tapered surface, and a bottom surface of the lock claw is a horizontal surface.   The electrical connection according to any one of claims 1 to 4, wherein the peripheral wall of the tubular holder is provided with a pair of the slits, and the holding member is provided with a pair of the lock pieces. box.

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