JP2011082110A - Mounting structure of electric wire cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of an electric wire cover capable of carrying out locking without looseness, and surely preventing fall-off of an electric wire cover. <P>SOLUTION: A flexible lock arm 42 is provided at a side wall 40d of a mat seal cover, on an inner face at a tip of which, a locking convex 42c is provided with a locking wall 42h headed toward a base end side of the flexible lock arm 42, a punching hole 40f for molding a locking wall 42h is formed at a convex wall part 40e with a base end 42a of the flexible lock arm 42 coupled, and a lock part 52 is provided at a side wall 50a of the wire cover 50 to be engaged with the flexible lock arm 42 by being inserted into the same. The lock part 52 is provided with a pushing open part 52a progressing by pushing open the flexible lock arm 42 outward, and a locking wall 52c engaged with the locking wall 42h of the locking convex 42c at returning of the flexible lock arm 42 to an initial position, and a protrusion piece 52d fitted into the punching hole 40f is provided at a front end of the lock part 52. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electric wire cover mounting structure for guiding a bundle of electric wires in a predetermined direction while protecting the bundle of electric wires drawn out from the rear end of a connector housing, for example.

14 and 15 show an example of an electric wire cover mounting structure disclosed in Patent Document 1. FIG.
As shown in FIG. 14 (a), a substantially rectangular wire lead-out portion 301a as viewed from the back is provided in the rear portion of the connector housing 301 made of synthetic resin, and a wire harness is formed in the wire lead-out portion 301a. A number of wire drawing holes 301d for pulling out each wire backward are arranged vertically and horizontally.

  Lock protrusions 301c projecting outward are respectively provided on the outer surfaces of the left and right side walls 301b of the wire lead-out part 301a, and a gold for forming the lock protrusion 301c is formed on the front wall surface of the lock protrusion 301c. A mold release hole 301e for extracting the mold is formed. Further, as shown in FIGS. 15A and 15B, a slit 301h that penetrates in the front-rear direction (a direction that coincides with the fitting direction S) is provided at the center in the vertical direction of the lock convex portion 301c. Yes.

  On the other hand, as shown in FIGS. 14B, 15A, and 15B, both side walls 302b of the synthetic resin cover 302 fitted to the outer periphery of the wire lead-out portion 301a of the connector housing 301 are provided on the side walls 302b. When the cover 302 is fitted to the outer periphery of the wire lead-out portion 301a from the fitting direction S, a lock hole 302c that is locked to the lock convex portion 301c is provided. Each lock hole 302c is provided with a projecting piece 302h that fits into the slit 301h when the lock hole 302c is engaged with the lock projection 301c. Further, at the front ends of both side walls 302b of the cover 302, there are provided projecting pieces 302e that are fitted into the mold release holes 301e on the connector housing 301 side when the cover 302 is fitted to the outer periphery of the wire lead-out portion 301a. Yes.

  In addition, a rectangular guide recess 301g is provided in the upper part of the wire lead-out surface 301f of the wire lead-out portion 301a of the connector housing 301, and the cover 302 is provided on the outer periphery of the wire lead-out portion 301a at the front portion of the cover 302. A square-shaped guide convex portion 302g that is fitted in the guide concave portion 301g from the fitting direction S is provided.

  In the wire cover mounting structure with this configuration, when the cover 302 is fitted to the outer periphery of the wire lead-out portion 301a of the connector housing 301, the lock hole 302c is locked to the lock protrusion 301c as shown in FIG. Then, the cover 302 is locked to the connector housing 301. At the same time, the protruding piece 302 e of the cover 302 is fitted into the mold release hole 301 e of the connector housing 301.

  Accordingly, the protruding piece 302e on the cover 302 side is thus fitted into the mold release hole 301e on the connector housing 301 side. Therefore, for example, a force in the direction of opening the cover 302 by pulling the wire harness or the like. Even if the protrusions 302e act, the protrusions 302e are restrained by the die-cutting holes 301e, thereby preventing the side walls 302b from being opened. Disappear.

JP-A-8-167446

  By the way, when the lock hole 302c of the electric wire cover 302 is locked to the lock convex portion 301c, the side wall 302b of the electric wire cover having the protruding piece 302e formed at the front end is once bent outwardly. The protruding piece 302e is inserted into the mold release hole 301e. At that time, if the tip of the protruding piece 302e hits the wall surface on which the die cutting hole 301e is formed, insertion becomes impossible. It is normal to have a margin.

  However, if such a dimensional allowance is provided, rattling is likely to occur between the mold release hole 301e and the protruding piece 302e, and the electric wire cover 302 may be removed or the electric wire cover 302 may be deformed by the looseness. There is a risk that it will occur.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an electric wire cover mounting structure that can be locked without rattling and can reliably prevent the electric wire cover from falling off or deforming. Is to provide.

In order to achieve the above-described object, the wire cover mounting structure according to the present invention is characterized by the following (1) and (2).
(1) In the mounting structure of the electric wire cover in which the electric wire cover that covers the electric wire drawn out from the electric wire drawing portion is detachably attached to the electric wire drawing portion provided in the rear part of the connector.
A flexible locking arm having a base end coupled to the side wall and a free end extending rearward to be able to bend in a direction intersecting the side wall is provided on the opposite side walls of the wire lead portion. Provided,
On the inner surface of each distal end of each of these flexible locking arms, there is provided a locking projection with a locking wall facing the base end side of the flexible locking arm,
In the wall portion where the base end of the flexible locking arm in front of the locking convex portion is joined, a punching hole for forming the locking wall of the locking convex portion is formed,
On the other hand, a lock portion that engages with the lock arm by being inserted inside the flexible locking arm is provided on the opposite side walls of the wire cover,
The lock portion is provided immediately after the push-opening portion, and a push-opening portion that advances while pushing open the flexible locking arm by abutting with the locking convex portion when the electric wire cover is attached. When the flexible locking arm is elastically returned to the initial inward position when the push-open portion exceeds the locking convex portion, the locking wall of the engaging convex portion of the flexible locking arm And a cover-side locking wall that restricts movement in the direction opposite to the mounting direction of the wire cover.
A protruding piece that fits into the die-cut hole is provided at the front end of the lock portion.
(2) In the mounting structure of the electric wire cover configured as described in (1) above,
At least one of the outer peripheral surface of the protruding piece and the inner peripheral surface of the die cutting hole, when the protruding piece fits into the die cutting hole, the inner peripheral surface of the die cutting hole or the protruding piece Rib protrusions are provided to close the play between the protruding piece and the die-cutting hole by being pressed against the outer peripheral surface.

According to the mounting structure of the wire cover having the configuration of (1) above, the die-cutting hole is formed on the side (the wire lead-out portion side) on which the flexible locking arm that needs to bend when the wire cover is locked is provided. In this way, the side with the lock portion (electric wire cover) that engages with the flexible locking arm does not bend at all at the time of locking, so the protruding piece and the die-cut hole provided at the front end of the lock portion Can be set to such a size that can be fitted without looseness, and the fitting of the protruding pieces and the die-cutting holes can surely prevent the opening of both side walls of the wire cover. Also, the flexible locking arm provided on the wire lead-out portion side is provided so as to bend outward when locking with the lock portion on the electric wire cover side, and the flexible locking arm bent to the outside. The lock portion on the electric wire cover side is inserted inside the, so that the lock is established. In other words, since the flexible locking arm is always positioned outside the lock portion provided on the side wall of the wire cover, the flexible locking arm can reliably suppress the opening of the side wall of the wire cover. Can do. For this reason, the reliability of the lock is increased, so that even when a load such as harness tension is applied, it is possible to reliably prevent the wire cover from being detached or deformed.
According to the mounting structure of the electric wire cover having the configuration of (2) above, the rib protrusion that presses against the peripheral surface of the mating side on at least one of the outer peripheral surface of the protruding piece or the inner peripheral surface of the die-cutting hole and packs backlash. Since it is provided, it is possible to more reliably prevent backlash of the mating part of the protruding piece and the die-cutting hole, and more reliably suppress the opening of the side wall of the wire cover. Deformation can be prevented.

  According to the present invention, since the lock can be performed without backlash, it is possible to reliably prevent the wire cover from falling off or deforming.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading the embodiments for carrying out the invention described below with reference to the accompanying drawings.

It is a disassembled perspective view of the connector unit to which the mounting structure of the first embodiment of the present invention is applied. It is a side view which shows the partial assembly state of the connector unit. It is a sectional side view which shows the partial assembly state of the connector unit. FIG. 2 is a front view of a mat seal cover (corresponding to a wire lead-out portion) in the connector unit component shown in FIG. FIG. 4 is an enlarged view showing a partial configuration when the connector unit is assembled, and is a side sectional view of a portion where a wire seal is locked to a mat seal cover assembled to a connector housing. It is a sectional side view which shows the state in the middle of the lock | rock of the part shown in FIG. It is a figure which expands and shows the principal part of FIG. It is VIII-VIII arrow sectional drawing of FIG. It is a disassembled perspective view of the connector unit to which the mounting structure of 2nd Embodiment of this invention was applied. FIG. 10 is an enlarged view showing a partial configuration when the connector unit of FIG. 9 is assembled, and is a side cross-sectional view of a portion where a wire cover is locked to the rear part of the connector housing. It is a sectional side view which shows the state in the middle of the lock | rock of the part shown in FIG. It is a figure which expands and shows the principal part of FIG. It is XIII-XIII arrow sectional drawing of FIG. It is explanatory drawing of the mounting structure of the conventional electric wire cover, (a) is a perspective view which shows the structure of the rear part of a connector, (b) is a perspective view which shows the structure of the electric wire cover side. (A) is an enlarged view showing the main part of FIG. 14 taken out, (b) is a cross-sectional view showing a state in which the portion shown in (a) is locked.

Embodiments of the present invention will be described below with reference to the drawings.
<< First Embodiment >>
1 to 8 are explanatory views of a first embodiment of the present invention, FIG. 1 is an exploded perspective view of a connector unit to which the mounting structure of the first embodiment is applied, and FIG. 2 is a partially assembled state of the connector unit. FIG. 3 is a side sectional view showing a partially assembled state of the connector unit. FIG. 4 is a front view of the mat seal cover (corresponding to the wire lead-out portion) in the connector unit component shown in FIG. 5 is an enlarged view showing a part of the structure when the connector unit is assembled. FIG. 6 is a side sectional view of a portion where the wire cover is locked to the mat seal cover assembled to the connector housing. FIG. 6 is a portion shown in FIG. 7 is a side cross-sectional view showing a state in the middle of locking, FIG. 7 is a view further enlarging the main part of FIG. 5, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG.

  The connector unit to which the electric wire cover mounting structure of the present embodiment shown in FIG. 1 is disassembled is configured by housing a large number of terminals (not shown) in a connector housing 11 made of a synthetic resin molded product. The multi-core connector 10 and the connector housing 11 are rotatably mounted so that the connector 10 is rotated in the direction of the arrow A when the connector 10 is fitted to a mating connector (not shown). According to the lever principle, a large fitting force is generated with a small rotational operation force, and the lever 12 made of a synthetic resin molded product for smoothly fitting both connectors and the rear portion of the connector housing 11 are fitted. A mat seal 30 made of rubber or flexible resin that seals a gap between the electric wire extending from each terminal accommodated in the connector housing 11 and the connector housing 11, and a connector. A mat seal cover 40 made of synthetic resin that is fitted and fixed to the rear portion of the udging 11 and prevents the mat seal 30 from falling off while pressing the mat seal 30 from the rear side (this mat seal cover 40 is an electric wire drawing portion of the connector as will be described later). For guiding the bundle of wires in a predetermined direction while protecting the bundle of wires pulled out from the rear side of the mat seal cover 40. And an electric wire cover 50 made of a synthetic resin molded product.

  As shown in FIGS. 1 and 2, the lever 12 is rotatably provided by fitting the mounting holes 14 of the lever 12 into the bosses 13 projecting from the outer surfaces of the both sides of the connector housing 11. Is held at the illustrated temporary locking position. When the connector is fitted, a protrusion (not shown) protruding from the housing of the mating connector is received at one end of the cam groove 16 from the lever 12 and the inlet 15 provided in the connector housing 11. 1 is rotated in the direction of arrow A in FIG. 1, the mating connector is pulled into the connector 10 side through the convex portion that slides along the cam groove 16 by the action of the cam groove 16. The connector can be fitted.

  As shown in FIG. 3, the rear portion of the connector housing 11 is provided with a cylindrical wall portion 17 that has a substantially square shape when viewed from the rear surface and into which the mat seal 30 is fitted, and the cylindrical wall portions 17 are mutually connected. Lock protrusions 18 for locking the mat seal cover 40 are provided on the outer peripheries of the upper and lower wall portions facing each other.

  Further, as shown in FIG. 1, the mat seal cover 40 is provided inside the cylindrical peripheral wall 40 a so as to press the mat seal 30 and the cylindrical peripheral wall 40 a corresponding to the shape of the cylindrical wall portion 17 of the connector housing 11. The pressing face plate portion 40b is provided with a number of electric wire drawing holes 40c arranged corresponding to the positions of the respective terminals in order to draw out the electric wires. . The upper and lower wall portions of the cylindrical peripheral wall 40a are provided with a lock portion 41 that engages with the lock projection 18 of the connector housing 11 when the mat seal cover 40 is assembled to the connector housing 11. Yes. When the mat seal cover 40 is attached to the rear portion of the connector housing 11, the electric wire is drawn backward from the rear surface of the mat seal cover 40, so the mat seal cover 40 corresponds to the electric wire extraction portion of the connector 10. It becomes a part to do.

  In the present embodiment, the electric wire cover 50 is attached and fixed to the mat seal cover (corresponding to the electric wire drawing portion) 40, and the rear end sides of the pressing surface plate portion 40b of the mat seal cover 40 are opposed to each other. A flexible locking arm 42 is provided on the left and right side walls 40d as a lock portion for locking the electric wire cover 50.

  As shown in FIGS. 5 to 7, the flexible locking arm 42 has a base end 42 a coupled to a convex wall portion 40 e projecting forward from the rear end edge of the outer surface of the side wall 40 d of the mat seal cover 40. The distal end 42b, which is a free end, extends rearward substantially parallel to the outer surface of the side wall 40d and can be bent in a direction crossing the side wall 40d. On the inner surface, a locking projection 42c is provided with a locking wall 42f facing the base end 42a side of the flexible locking arm 42. In addition, an inclined surface 42d that facilitates insertion of a push-opening portion 52a of the lock portion 52 on the electric wire cover 50 side, which will be described later, is provided on the distal end surface of the engaging convex portion 42c. In addition, a cross-section for forming the locking wall 42h of the locking projection 42c is formed on the protruding wall portion 40e, which is located in front of the locking projection 42c and joined with the base end 42a of the flexible locking arm 42. A rectangular punching hole 40f is formed.

  On the other hand, as shown in FIG. 1, the electric wire cover 50 has a substantially bowl shape having a space 58 for guiding an electric wire therein, and the left and right side walls 50a facing each other have a flexible locking arm 42 and a side wall. A lock portion 52 that engages with the flexible locking arm 42 is provided by being inserted into the gap between the arm 40d.

  As shown in FIG. 6, when the electric wire cover 50 is mounted, the lock portion 52 pushes the flexible locking arm 42 outward by abutting with the locking convex portion 42 c of the flexible locking arm 42. A push-opening portion 52a that advances while opening, and is provided immediately after the push-opening portion 52a. When the push-opening portion 52a exceeds the locking projection 42c, the flexible locking arm 42 is elastically returned to the initial inward position. 5 and 7, the engagement with the engagement wall 42 h of the engagement protrusion 42 c of the flexible engagement arm 42 is performed, thereby moving the wire cover 50 in the opposite direction. And a cover side locking wall 52c that restricts the movement of the cover. The cover side locking wall 52c is constituted by a concave inner wall provided on the outer surface of the side wall 50a.

  In addition, a protruding piece 52 d that fits into the die-cutting hole 40 c on the mat seal cover 40 side protrudes from the distal end surface of the push-open portion 52 a of the lock portion 52. In addition, an abutting portion 52b that positions the lock portion 52 in the insertion direction by abutting against the convex wall portion 40e of the mat seal cover 40 is provided on the front end surface of the push-open portion 52a.

  Further, as shown in FIG. 8, the outer peripheral surface of the protruding piece 52d inserted into the die cutting hole 40f is the inner peripheral surface of the die cutting hole 40f that faces when the protruding piece 52d fits into the die cutting hole 40f. A plurality of rib protrusions 52e are provided to pack the backlash between the protruding piece 52d and the die-cutting hole 40f. These rib protrusions 52e are provided at an appropriate interval in the circumferential direction. In the present embodiment, one rib projection 52d is provided on each outer side surface on the short side of the projecting piece 52d having a rectangular cross section, and on the long side side. Two are provided on both outer surfaces. These rib protrusions 52e are provided as continuous ridges extending along the insertion direction of the protruding piece 52d with respect to the die punching hole 40f.

Next, the operation will be described.
When assembling the connector unit shown in FIG. 1, the lever 12 is assembled to the connector housing 11 constituting the connector 10, the mat seal 30 is fitted into the rear portion of the connector housing 11, and the mat seal 30 is pressed while pressing the mat seal 30. 40 is attached and fixed to the rear part of the connector housing 11. FIG. 3 shows this state, and the mat seal cover 40 is fixed to the connector housing 11 by engaging the lock portion 41 of the mat seal cover 40 with the lock projection 18 of the connector housing 11. In this state, a large number of electric wires are drawn backward from the electric wire extraction hole 40c of the mat seal cover 40. Accordingly, the mat seal cover 40 is a portion corresponding to the wire lead-out portion of the connector 1.

  Next, the electric wire cover 50 is attached to the mat seal cover 40 while picking up the electric wire drawn backward so as to enter the inner space 58. In that case, first, the front surface of the electric wire cover 50 is directly opposed to the rear surface of the mat seal cover 40, and the electric wire cover 50 is pushed and moved toward the mat seal cover 40 while keeping the posture, so that the left and right side walls 50a of the electric wire cover 50 are moved. The provided lock portion 52 is inserted into the gap between the lock arm 42 provided on the left and right side walls 40d of the mat seal cover 40 and the side wall 40d.

  Then, as shown in FIG. 6, the protruding piece 52 d provided at the front end of the push-opening portion 52 a of the lock portion 52 hits the inclined surface 42 d of the front end of the engagement convex portion 42 c of the lock arm 42, thereby As shown in FIGS. 5 and 7, when the locking portion 52 advances forward while pushing the free end outward and the push-opening portion 52 a exceeds the locking projection 42 c, the flexible locking arm 42 is moved. By elastically returning to the initial inward position, the locking wall 42h of the engaging convex portion 42c of the flexible locking arm 42 and the locking wall 52c on the electric wire cover 50 side are engaged. Thereby, the electric wire cover 50 is stopped so as not to fall backward.

  At the same time, the projecting piece 52d fits into the die punching hole 40f provided in the convex wall portion 40e of the mat seal cover 40, so that the side wall 50a of the electric wire cover 50 is restricted from opening to the outside. Further, since the abutting portion 52b provided on the front end surface of the push-opening portion 52a of the lock portion 52 abuts on the rear end surface of the convex wall portion 40e of the mat seal cover 40, further insertion of the lock portion 52 is restricted. The In this state, the protruding piece 52d has entered the die punching hole 40f by the dimension indicated by H in FIG. 7, and the opening of the side wall 50a of the electric wire cover 50 is restricted at this entering portion.

  Further, when the protruding piece 52d is inserted into the die cutting hole 40f, as shown in FIG. 8, a plurality of rib protrusions 52e provided on the outer peripheral surface of the protruding piece 52d are in pressure contact with the inner peripheral surface of the die cutting hole 40f. The protruding piece 52d and the mold release hole 40f are tightly fitted.

  As described above, according to the mounting structure of the electric wire cover applied to the connector unit of this embodiment, the side (mat) provided with the flexible locking arm 42 that needs to bend when the electric wire cover 50 is locked. A die-cutting hole 40f is formed on the seal cover 40 side, and the side having the lock portion 52 that engages with the flexible locking arm 42 (the wire cover 50) is not bent at all when locked. Therefore, the projecting piece 52d provided at the front end of the lock portion 52 and the die cutting hole 40f can be set to dimensions that can be fitted without backlash. Therefore, it is possible to reliably prevent the side walls 50a of the electric wire cover 50 from being opened by fitting the projecting pieces 52d and the mold release holes 40f.

  Further, the flexible locking arm 42 provided on the mat seal cover 40 side is provided so as to bend outward when locking with the lock portion 52 on the electric wire cover 50 side. Since the lock portion 52 on the electric wire cover 50 side is inserted into the inner side of the flexible locking arm 42 so that the lock is established, that is, the flexible locking arm 42 is attached to the side wall 50 a of the electric wire cover 50. Since the lock portion 52 is always located outside, the flexible locking arm 42 can also reliably prevent the side wall 50a of the wire cover 50 from opening.

  Therefore, by increasing the reliability of locking, it is possible to improve the holding power of the electric wire cover 50, and it is possible to reliably prevent the electric wire cover 50 from being detached or deformed even when a harness tension is applied.

  In addition, since the rib protrusion 52e for backlashing is provided on the outer peripheral surface of the protruding piece 52d, it is possible to reliably prevent the backlash of the fitting portion of the protruding piece 52d and the mold release hole 40f. The opening of the side wall 50a of the electric wire cover 50 can be reliably suppressed, and the electric wire cover 50 can be prevented from coming off.

<< Second Embodiment >>
9 to 13 are explanatory views of the second embodiment of the present invention. FIG. 9 is an exploded perspective view of the connector unit to which the mounting structure of the second embodiment is applied. FIG. 10 is a view of the connector unit of FIG. FIG. 11 is an enlarged view showing a part of the structure when assembled, and is a side sectional view of a portion in which a wire cover is locked to the rear portion of the connector housing, and FIG. 11 is a side sectional view showing a state in the middle of locking the portion shown in FIG. FIGS. 12 and 12 are enlarged views showing the main part of FIG. 11, and FIG. 13 is a cross-sectional view taken along the line XIII-XIII in FIG.

  In the first embodiment described above, the connector unit in the case where the mat seal 30 and the mat seal cover 40 are provided has been described. In the second embodiment, a connector unit in the case where the mat seal and the mat seal cover are not provided will be described.

  The connector unit to which the wire cover mounting structure of the present embodiment shown in FIG. 9 is applied is configured by housing a large number of terminals (not shown) in a connector housing 111 made of a synthetic resin molded product. The multi-core connector 110 and the connector housing 111 are pivotally mounted on the outside of the connector housing 111, and are pivoted when the connector 110 is engaged with a mating connector (not shown). Thus, a large fitting force is generated with a small rotational operation force, and the lever 112 made of a synthetic resin molded product that smoothly fits both the connectors and the wire lead-out portion 140 at the rear of the connector housing 111 to the rear. And an electric wire cover 150 made of a synthetic resin molded product for guiding the electric wire bundle in a predetermined direction while protecting the drawn electric wire bundle. The reason why the lever 112 and the wire cover 150 are necessary is the same as the reason described above.

  The lever 112 is rotatably supported by bosses 113 projecting from the outer surfaces of both sides of the connector housing 111, and plays the same role as in the first embodiment.

  The rear portion of the connector housing 111 is an electric wire extraction portion 140 from which a large number of electric wires are drawn out, and is flexible as a lock portion for locking the electric wire cover 150 to the left and right side walls 140d facing each other. A locking arm 142 is provided.

  As shown in FIGS. 10 to 12, the flexible locking arm 142 has a base end 142 a coupled to a convex wall portion 140 e protruding from the outer surface of the side wall 140 d of the wire lead-out portion 140, and a free end. The distal end 142b is extended rearward and can be bent in a direction crossing the side wall 140d, and the inner end of each distal end 142b of the flexible locking arm 142 has a base end of the flexible locking arm 142. A locking projection 142c with a locking wall 142f facing the 142a side is provided. In addition, an inclined surface 142d that facilitates insertion of a push-open portion 152a of the lock portion 152 on the electric wire cover 150 side, which will be described later, is provided on the distal end surface of the engaging convex portion 142c. In addition, a cross-section for forming the locking wall 142h of the locking convex portion 142c is formed on the convex wall portion 140e, which is located in front of the locking convex portion 142c and to which the base end 142a of the flexible locking arm 142 is coupled. A rectangular die-cutting hole 140f is formed.

  On the other hand, as shown in FIG. 9, the wire cover 150 has a substantially bowl shape having a space 158 for guiding the wire inside, and the left and right side walls 150 a facing each other are provided inside the flexible locking arm 142. The lock portion 152 that engages with the flexible locking arm 142 is provided.

  As shown in FIG. 10, the lock portion 152 pushes the flexible locking arm 142 outward by abutting with the locking projection 142 c of the flexible locking arm 142 when the electric wire cover 150 is attached. A push-opening portion 152a that advances while opening, and is provided immediately after the push-opening portion 152a. When the push-opening portion 152a exceeds the locking projection 142c, the flexible locking arm 142 is elastically returned to the initial inward position. 5 and 7, when engaged, the engagement protrusion 142c of the flexible locking arm 142 engages with the locking wall 142h to move the wire cover 150 in the direction opposite to the mounting direction. And a cover-side locking wall 152c that restricts the movement. Further, a projecting piece 152 d that fits into the mold release hole 140 f on the connector housing 111 side is projected from the distal end surface of the push-open portion 152 a of the lock portion 152. In addition, an abutting portion 152b that positions the lock portion 152 in the insertion direction by abutting against the convex wall portion 140e of the mat seal cover 140 is provided on the front end surface of the push-open portion 152a.

  Further, as shown in FIG. 13, the outer peripheral surface of the projecting piece 152d inserted into the mold punching hole 140f has an inner peripheral surface of the mold punching hole 140f that faces when the projecting piece 152d is fitted into the mold punching hole 140f. A plurality of rib protrusions 152e are provided to close the backlash between the protruding piece 152d and the mold release hole 140f. These rib protrusions 152e are provided at an appropriate interval in the circumferential direction. In the present embodiment, one rib projection 152e is provided on each outer side surface on the short side of the protruding piece 152d having a rectangular cross section, and on the long side side. One is provided on each outer side surface. These rib protrusions 152e are provided as ridges that are continuous along the insertion direction of the protruding piece 152d with respect to the die punching hole 140f.

Next, the operation will be described.
When assembling the connector unit shown in FIG. 9, the lever 112 is assembled to the connector housing 111 constituting the connector 110, and the electric wire drawn backward is connected to the electric wire drawing portion 140 located at the rear of the connector housing 111. The electric wire cover 150 is attached while picking it up into 158. In that case, first, the front surface of the electric wire cover 150 is directly opposed to the rear surface of the connector housing 111, and the electric wire cover 150 is pushed and moved to the connector housing 111 side in the posture, so that the electric wire cover 150 is provided on the left and right side walls 150a. A lock portion 152 is inserted into the lock arm 142 provided on the left and right side walls 140 d of the wire lead-out portion 140 of the connector housing 111.

  Then, as shown in FIG. 11, the projecting piece 152 d provided at the front end of the push-open portion 152 a of the lock portion 152 hits the inclined surface 142 d of the front end of the engagement convex portion 142 c of the lock arm 142, thereby As shown in FIGS. 10 and 12, when the locking portion 152 advances forward while pushing the free end outward and the push-opening portion 152a exceeds the locking projection 142c, the flexible locking arm 142 By elastically returning to the initial inward position, the engaging wall 142h of the engaging convex portion 142c of the flexible locking arm 142 and the engaging wall 152c on the electric wire cover 150 side are engaged, thereby the electric wire cover. 150 is stopped so that it does not fall backward.

  At the same time, the projecting piece 152d is fitted into the die-cutting hole 140f provided in the convex wall portion 140e of the wire lead-out portion 140 of the connector housing 111, so that the side wall 150a of the wire cover 150 is restricted from opening to the outside. The Further, the abutment portion 152b provided on the front end surface of the push-opening portion 152a of the lock portion 152 abuts against the end surface of the convex wall portion 140e of the wire lead-out portion 140, so that further insertion of the lock portion 152 is restricted. . In this state, the projecting piece 152d has entered the die-cutting hole 140f by the dimension indicated by H in FIG. 12, and the opening of the side wall 150a of the wire cover 150 is restricted at this entering portion.

  Further, when the protruding piece 152d is inserted into the die cutting hole 140f, as shown in FIG. 13, the plurality of rib protrusions 152e provided on the outer peripheral surface of the protruding piece 152d are in pressure contact with the inner peripheral surface of the die cutting hole 140f. The projecting piece 152d and the mold release hole 140f are tightly fitted.

  As described above, according to the mounting structure of the electric wire cover applied to the connector unit of this embodiment, the side on which the flexible locking arm 142 that needs to be bent when locking the electric wire cover 150 is provided (connector). A die-cutting hole 140f is formed in the electric wire lead-out portion 140 side of the housing 111, and the side (the electric wire cover 150) with the lock portion 152 that engages with the flexible locking arm 142 is not bent at the time of locking. Therefore, the projecting piece 152d provided at the front end of the lock portion 152 and the die-cutting hole 140f can be set to dimensions that can be fitted without backlash. Therefore, it is possible to reliably prevent the side walls 150a of the electric wire cover 150 from being opened by fitting the projecting pieces 152d and the die-cutting holes 140f.

  The flexible locking arm 142 provided on the mat seal cover 40 side is provided so as to bend outward when locking with the lock portion 152 on the electric wire cover 150 side. The lock portion 152 on the electric wire cover 150 side is inserted inside the flexible locking arm 142 so that the lock is established. That is, the flexible locking arm 142 is attached to the side wall 150 a of the electric wire cover 150. Since the lock portion 152 is always located outside, the flexible locking arm 142 can surely suppress the opening of the side wall 150a of the wire cover 150.

  Therefore, by increasing the reliability of locking, it is possible to improve the holding power of the electric wire cover 150, and it is possible to reliably prevent the electric wire cover 150 from being detached or deformed even when a harness tension is applied.

  Further, since the rib protrusion 152e for backlashing is provided on the outer peripheral surface of the projecting piece 152d, it is possible to reliably prevent the backlash of the fitting portion of the projecting piece 152d and the die-cutting hole 140f. Opening of the side wall 150a of the electric wire cover 150 can be suppressed reliably, and the electric wire cover 150 can be prevented from coming off.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, in each of the above embodiments, the rib protrusions 52e and 152e are provided on the outer peripheral surfaces of the protruding pieces 52d and 152d. However, the same effect can be obtained even if the rib protrusions are provided on the inner peripheral surfaces of the die cutting holes 40f and 140f. Can be obtained.

  In each of the above embodiments, the case where the present invention is applied between the mat seal cover and the wire cover attached to the rear portion of the connector and the case where the present invention is applied between the connector and the wire cover have been described. The invention can also be applied between a wire lead portion such as a junction block or a relay block and a wire cover.

10 Connector 11 Connector housing 40 Mat seal cover (wire lead-out part)
40d Side wall 40e Convex wall part 40f Die punch hole 42 Lock arm 42a Base end 42b Tip 42c Locking convex part 50 Electric wire cover 50a Side wall 52 Lock part 52a Push-opening part 52b Abutting part 52c Locking wall 52d Protruding piece 52e Rib protrusion 110 Connector 111 Connector housing 140 Wire lead-out portion 140d Side wall 140e Convex wall portion 140f Die-out hole 142 Lock arm 142a Base end 142b Tip 142c Locking wall 150 Electric wire cover 150a Side wall 152 Locking portion 152a Push-opening portion 152b Locking portion 152c Locking wall 152d protruding piece 152a rib protrusion

Claims (2)

In a wire cover mounting structure in which a wire cover that covers a wire drawn from the wire lead portion is detachably attached to a wire lead portion provided at the rear of the connector.
A flexible locking arm having a base end coupled to the side wall and a free end extending rearward to be able to bend in a direction intersecting the side wall is provided on the opposite side walls of the wire lead portion. Provided,
On the inner surface of each distal end of each of these flexible locking arms, there is provided a locking projection with a locking wall facing the base end side of the flexible locking arm,
In the wall portion where the base end of the flexible locking arm in front of the locking convex portion is joined, a punching hole for forming the locking wall of the locking convex portion is formed,
On the other hand, on the opposite side walls of the electric wire cover, a lock portion that is engaged with the flexible locking arm by being inserted inside the flexible locking arm is provided.
The lock portion is provided immediately after the push-opening portion, and a push-opening portion that advances while pushing open the flexible locking arm by abutting with the locking convex portion when the electric wire cover is attached. When the flexible locking arm is elastically returned to the initial inward position when the push-open portion exceeds the locking convex portion, the locking wall of the engaging convex portion of the flexible locking arm And a cover-side locking wall that restricts movement in the direction opposite to the mounting direction of the wire cover.
An electric wire cover mounting structure, wherein a protruding piece that fits into the die-cut hole is provided at a front end of the lock portion.   At least one of the outer peripheral surface of the protruding piece and the inner peripheral surface of the die cutting hole, when the protruding piece fits into the die cutting hole, the inner peripheral surface of the die cutting hole or the protruding piece 2. The connector wire cover mounting structure according to claim 1, wherein a rib protrusion is provided to close a backlash between the protruding piece and the punching hole by being pressed against the outer peripheral surface.

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