JP2002252912A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a connector to be housed in a grommet which lets optional electric wires, pass through SOLUTION: The grommet comprises a grommet body which is provided with a connector housing part, at the tip of an electric wire inserting cylinder part for passing a wiring harness, which houses the connector connected to the tip of an electric wire group of the harness, and an inner sleeve of resin which locks and fixes, the connector internally fitted and is fitted to the inside of the connector housing part. A cover part is projectedly provided from a part of a peripheral wall of the inner sleeve via a thin walled hinge. An insertion space for the optional electric wires is provided under a condition that the peripheral wall is covered with the cover part, and locking pieces each having a locking protrusion are provided on both right and left sides of the inner face of the cover part. On the other hand, a guiding projection is provided on the outside of the peripheral wall covered with the cover part, and the locking projection of the cover part is traced along the guiding projection when covering the cover part on the peripheral wall. Thereby positional deviation of the cover part can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet to be mounted on a wire harness routed to an automobile and mounted in a through hole of a vehicle body panel. More specifically, an inner sleeve is fitted inside a grommet, and the wire harness is provided. To hold the connector attached to the connector.

[0002]

2. Description of the Related Art Conventionally, a grommet is attached to a wire harness that is inserted into a through hole formed in a body panel of an automobile, and the grommet is mounted in the through hole of the body panel to provide waterproofing and dustproofing to a vehicle compartment. Sound insulation and wire harness protection are also provided.

When laying a wire harness through a through hole in a door panel and a vehicle body panel, a grommet 1 as shown in FIG. 7 is used. The grommet 1 is provided with a vehicle body locking portion 2 on the door panel side and a vehicle body locking portion 3 on the vehicle panel side on both sides of the bellows-shaped electric wire insertion portion. Through hole H of door panel P1
1. Locked in the through holes H2 of the vehicle body panel P2.

The vehicle body engaging portion 2 on the door panel side is formed by providing a groove on the outer peripheral surface of the large diameter portion 1a of the grommet 1, and the groove is locked in the through hole H1 of the door panel P1. On the other hand, the vehicle body locking portion 3 on the vehicle body panel side has a resin inner sleeve 4 fitted therein, and locks a locking claw 4a provided on the inner sleeve 4 with a through hole H2 of the vehicle body panel P2.

The grommet 1 has a wire harness W /
H, is inserted through a small-diameter electric wire insertion tube portion 1b protruding from the vehicle body locking portion 3 on the vehicle body panel side, and is connected to the ends of electric wires w1 'and w2' constituting the wire harness W / H, 5b is exposed outside the grommet 1.

[0006]

In the above grommet configuration, the inserted wire harness W / H and the connectors 5a and 5b are led out of the grommet tip without being fixed to the grommet 1, and the grommet 1 is connected to the door panel P1. When the connectors 5a and 5b are inserted into the through-hole H1 and the through-hole H2 of the vehicle body panel P2, the connectors 5a and 5b interfere with the peripheral panel of the through-hole, so that the grommet 1 is difficult to insert, and the connectors 5a and 5b, the electric wires w1 ', There is a problem that w2 'may be damaged by interference.

The above problem can be solved if the connector is fixedly held inside the grommet by providing a connector holding portion on the inner sleeve fitted inside the grommet. However, since the connector held by the inner sleeve is connected to the standard electric wire w1 ', there is a problem that if there is an optional electric wire w2', it cannot pass through the grommet.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has an object to provide a grommet of a type in which a connector is held by an inner sleeve so that an optional electric wire can be passed through the grommet. I have.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a grommet to be attached to a wire harness inserted into a through hole formed in a body panel of an automobile, wherein the wire harness is inserted through the wire harness. A grommet main body made of an elastic material having a connector accommodating portion for accommodating a connector connected to an end of the wire group of the wire harness at the distal end of the cylindrical portion, and the connector is internally fitted and locked and fixed inside the connector accommodating portion. With a resin inner sleeve to be fitted, a cover portion protrudes from a part of the peripheral wall of the inner sleeve via a thin hinge, and the insertion space of the option electric wire is inserted in a state where the cover portion is covered on the peripheral wall. And a locking piece provided with locking projections on both left and right sides of the inner surface of the cover portion, and a peripheral wall on which the cover portion is covered. A guide projection provided on the surface side provides a grommet has a configuration capable of preventing the displacement of the cover portion by causing along the locking projection of the cover portion to the guide projections when the cover the peripheral wall of the cover portion.

As described above, even when the connector is held by the inner sleeve, the optional wire can be passed through the grommet by providing an insertion space for the optional wire between the connector and the inner sleeve.
That is, if the inner sleeve is fixed to the grommet while the connector is inserted through the inner sleeve, the connector can be accommodated in the grommet and the optional wire can be passed through the grommet. In addition, since the inner sleeve for fitting the connector inside can be fixed to the grommet irrespective of the insertion of the option wire, the grommet can be used irrespective of the presence or absence of the option wire.

Further, since the cover is integrally formed with the peripheral wall via the thin hinge, the cover can be easily covered with the hinge by bending the cover with a single touch. In addition, the locking projections provided on the left and right sides of the cover are bent along the guide projections protruding from the opposing peripheral wall, so that the cover can be smoothly raised up to the normal position to cover the peripheral wall. An insertion space for the electric wire can be formed.

The guide projections are provided on both right and left sides of the connector lock portion projecting stepwise from the peripheral wall, and one guide projection is provided at a position along the upper surface of one of the locking projections. On the other hand, the guide protrusion on the other side is provided at a position along the lower surface of the locking protrusion on the other side.

[0013] Since the connector lock portion protrudes stepwise from the peripheral wall of the inner sleeve, dents are formed on both sides thereof. By projecting the cover from the base of the connector lock, an insertion space for the optional electric wire can be formed between the recess and the cover. In addition, when guide protrusions are provided on both right and left side surfaces of the connector lock portion protruding, the guide protrusions can be provided without narrowing the insertion space for the option wires. In addition, one side of the guide protrusion guides the upper surface of the locking protrusion, and the other side guides the lower surface to guide from the up and down direction.
The peripheral wall can be covered by bending the cover portion without displacement. If grooves are provided on the left and right sides to guide the upper and lower surfaces of the locking projections, it is necessary to insert the locking projections into the grooves without displacement, resulting in poor operability.

The guide protrusion on one side along which the locking protrusion extends along the upper surface is provided with a recessed portion at a rear end position, and the locking protrusion is provided at the final standing position where the cover covers the peripheral wall. It is preferable to adopt a configuration in which the liquid crystal is stably held by being dropped.

The cover has a lock claw projecting from two sides perpendicular to the peripheral wall on which the cover is to be placed, for locking the vehicle body. The cover portion and the retaining wall protrude from the remaining side of the peripheral wall to form a continuous annular frame with the cover portion covering the peripheral wall, and the retaining flange portion is provided on the inner peripheral surface of the connector accommodating portion. Inserting and locking into the formed annular groove and projecting pins at four corners of the annular frame,
It is configured to be inserted and locked in a pin hole drilled in a corner.

As described above, the locking flanges of the cover and the peripheral wall are continuously inserted and locked in the annular groove of the connector accommodating portion. However, when the cover is displaced, the locking flange of the cover is formed. And the engagement flange portion of the inner sleeve peripheral wall is displaced, and there is a danger of water infiltration from a gap caused by the displacement. However, as described above, since the cover portion can be held at the cover position without displacement, It is possible to ensure a waterproof function of causing a displacement between the continuous locking flanges.

The grommet is attached to a door harness through which a through-hole of a door panel and a through-hole of a vehicle body panel are inserted. The grommet main body has a wire insertion portion and a large-diameter recessed body locking groove formed on an outer peripheral surface. The connector, the bellows-like electric wire insertion portion, and the connector accommodating portion are continuously formed integrally, and the option electric wire is inserted through the inside of the grommet main body, and is drawn out through the insertion space in the connector accommodating portion. .

Since the door harness inserted between the door panel and the vehicle body panel is inserted through the two through holes of the door panel and the vehicle body panel, if the connector is exposed from the grommet tip, the penetrating workability deteriorates. When the connector is accommodated by providing the connector accommodating portion at the tip, the penetrating work can be facilitated and the connector can be hardly damaged. Further, although an optional part is often attached to the door, the optional electric wire can be passed through the inside of the grommet while holding the connector on the grommet as described above.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. The grommet of the embodiment is attached to a door harness that passes through the through hole H2 of the vehicle body panel P2 after passing through the through hole H1 of the door panel P1 and a connector that is connected to the tip of the door harness inside the grommet as in the conventional example. It is fixed to.

As shown in FIG. 1, the grommet 10 is a grommet body 11 made of rubber or elastomer.
And an inner sleeve 20 made of resin. The grommet body 11 includes an electric wire insertion tube portion 12, a large-diameter tube portion 13, a bellows-shaped electric wire insertion tube portion 14, and a connector housing portion 15 from one end side.
Are continuously and integrally molded. The connector accommodating portion 15 accommodates an inner sleeve 20 made of resin for fitting and fixing the connector 30 therein. On the outer periphery of the large-diameter cylindrical portion 13, a vehicle body locking groove 16 to be mounted in the through hole H1 of the door panel P1 is recessed, and the inner sleeve 20 is locked to a peripheral edge of the through hole H2 of the vehicle body panel P2. Lock claw 21g
Is provided.

As shown in FIG. 2A, the connector accommodating portion 15 has a cross-sectional shape corresponding to the cross-sectional shape of the inner sleeve 20, has an opening 15a at its tip, and accommodates the entire inner sleeve 20. An annular groove 15b for providing depth and for positioning and holding the inner sleeve 20 is provided on the front end side of the inner wall surface. further,
As shown in FIG. 2B, pin holes 15i are provided at four corners of the annular groove 15b.

As shown in FIGS. 3 and 4, the inner sleeve 20 has a connector locking portion 21d projecting stepwise at the center of one side of a rectangular frame-shaped peripheral wall 21 surrounding the outer periphery of the connector 30. The left and right sides of 21d are L-shaped depressions 21e. The connector lock section 21d
The cover 22 is integrally formed and protruded from the base end thereof via a thin hinge portion 21c. The cover portion 22 is large enough to cover the peripheral wall 21 on which the connector lock portion 21d is protruded, and the cover portion 22 is formed by bending the thin hinge portion 21c and covering the peripheral wall 21, and the concave portion 21e of the peripheral wall 21 is formed.
Space S for the option electric wire between
Is formed. Further, the cover 22 is connected to one of the sides of the peripheral wall 21 so as to be continuous with the remaining three sides of the peripheral wall 21.

A pair of left and right locking pieces 22a project from the inner surface of the cover portion 22 so as to cover the cover portion 22 in a normal posture without displacement with respect to the peripheral wall 21. These locking pieces 22a are attached to the peripheral
Projecting so as to be parallel to the left and right outer surfaces of the left and right sides, and a substantially circular locking projection 22a-
1, 22a-2 are projected.

On the other hand, the first and second guide projections 21a-1 and 21a having substantially the same thickness as the locking projections 22a-1 and 22a-2 are provided on the left and right outer surfaces of the connector lock portion 21d.
-2 is provided. The guide projections 21a-1, 21
The first guide projection 21a-1 on one side is provided at a position along the upper surface of the first locking projection 22a-1 on one side as a guide surface by forming an arc surface c on one side of each of the a-2. . The second guide projection 21a-2 on the other side is provided at a position along the lower surface of the second lock projection 22a-2 on the other side,
The first locking projection 22a-1 is moved from above to the second locking projection 2
2a-2 is guided from below.

The first guide projection 21a-1 is provided with a recessed portion P at the back end of the circular arc surface, and the first guide projection 22a-1 is recessed into the recessed portion P to form the cover portion 22. Are stably held at an upright position covering the peripheral wall 21.

On the three sides of the continuous cover portion 22 and the peripheral wall 21 not covered with the cover portion 22, locking flange portions 22b, 21b protrude from the outer peripheral surface. With the cover portion 22 covered on the peripheral wall, a continuous annular frame 20b is formed to be inserted and locked in the annular groove 15b of the connector housing portion 15. Further, pins 20i project outward from the four corners of the annular frame 20b, and are inserted into pin holes 15i formed at the four corners of the connector housing. In the inserted state, the pins 20i are dimensioned so as not to protrude from the outer surface of the connector housing.

Small projections 22f, 21f are provided on opposing end surfaces of the locking flanges 22b, 21b, and the small projections 22f, 21f are vertically moved in a state where the locking flanges 22b, 21b are continuous. To be positioned and held.

Further, the inner sleeve 20 is provided with a lock claw 21g for locking the vehicle body on a peripheral wall orthogonal to the peripheral wall on which the cover portion 22 is covered. The lock claw 21 g is projected from the opening 15 a of the connector housing 15.

As shown in FIG. 3, the connector 30 has a locked portion 32 which is locked at the center of the peripheral wall 31 with the connector locking portion 21d of the inner sleeve 20. The connector 30 is connected to a terminal of a standard electric wire (an electric wire other than the optional electric wire) w1 of the door harness W / H.

The standard electric wire w to the grommet 10 having the above configuration
A procedure for attaching the connector 30 and passing the optional electric wire w2 will be described.

The standard electric wire w1 and the optional electric wire w
2 is inserted through the wire insertion tube portion 12 on one end side of the grommet body 11, and the large-diameter tube portion 13, the bellows-shaped wire insertion tube portion 14,
Pass the connector housing 15 through. After the terminal (not shown) of the wire terminal drawn out from the connector accommodating portion 15 is passed through the inner sleeve 20, the terminal is inserted and locked in the connector 30. In this state, as shown in FIG. 3, the connector 30 is inserted into the inner sleeve 20 in the direction of the arrow in the figure, and the connector lock portion 21d of the inner sleeve 20 and the locked portion 32 of the connector 30 are locked. A half-side portion of the connector 30 is internally fitted and fixed to 20. The terminals of the electric wires may be connected to the connector with the connector 30 attached to the inner sleeve 20.

Subsequently, as shown in FIG. 5 (A), with the cover 22 of the inner sleeve 20 open, the option electric wire w2 is inserted into the recess 21e of the inner sleeve 20.
Through. Thereafter, the thin hinge portion 21c is bent, the cover portion 22 is put on the peripheral wall 21, and an insertion space S surrounding the option electric wire w2 passed through the recess 21e is formed as shown in FIG. 5B.

When bending the thin hinge portion 21c, FIG.
As shown in (A) to (C), the upper surface of the first locking projection 22a-1 is on the circular arc surface of the first guiding projection 21a-1, and the lower surface of the second locking projection 22a-2 is the second guiding projection. Projection 21a-2
6D, the locking projection 22a-1 is fitted into the recessed portion p on the arc surface with the cover portion 22 covering the peripheral wall 21 as shown in FIG. 6 (D). Will be retained. In this way, by guiding the locking projections 22a on both sides from the up and down direction, the cover portion 22 is supported by the thin hinge portion 21c as a fulcrum and the peripheral wall 21 is not shifted vertically.
Can be put on.

Further, since the cover portion 22 is positioned and held at the proper position with the cover portion 22 covering the peripheral wall, the locking flange portion 22 of the cover portion 22 and the locking flange portion 2 of the peripheral wall are provided.
1b is precisely aligned. Therefore, in this state, as shown in FIG. 5B, the small projections 22f of the cover portion 22 and the small projections 21f of the peripheral wall 21 are joined, and the cover portion 22 is kept in close contact with the peripheral wall 21. As a result, a decrease in waterproof performance that occurs when a displacement occurs does not occur.

As shown in FIG. 5 (B), the inner sleeve 20 in which the connector 30 to which the standard electric wire w1 is connected and the optional electric wire w2 are attached to the connector accommodating portion 15 of the grommet main body 11 in the direction of the arrow in the figure. When pushed inward, the annular frame 20b provided continuously on the outer periphery of the inner sleeve 20 is inserted and locked in the annular groove 15b formed in the inner wall surface of the connector housing portion 15. Also, as shown in FIG. 2B, pins 20i projecting from four corners of the annular frame 20b of the inner sleeve 20 are connected to the inner sleeve fitting cylindrical portion 1.
The inner sleeve 20 can be securely fixed by inserting and locking it into the pin holes 15i formed at the four corners of No. 5.

As described above, the inner sleeve 20 is accommodated and fixed in the grommet main body 11, so that the connector 30 connected to the terminal of the standard electric wire w1 can be accommodated and fixed in the grommet 10 without exposing the connector 30 to the terminal. w2 can be passed through the grommet 10.

The grommet 10 into which the standard electric wire w1 and the optional electric wire w2 are inserted is passed through the through hole H1 of the door panel P1 from the connector accommodating portion 15 as shown in FIG. To lock. Subsequently, the lock claw 21g of the inner sleeve 20 protruding from the distal end opening of the connector accommodating portion 15 is connected to the vehicle body panel P2.
At the periphery of the through hole H2. When the connector 30 is inserted into the vehicle body panel, the connector 30 is housed inside the grommet 10. Therefore, only the connector 40 of the optional wire protrudes from the grommet 10.
When the grommet 10 is passed through the through holes H1 and H2 while the 0 is passed through the through holes H1 and H2, the grommet 10 can be easily inserted into the through holes, and the connector does not interfere with the vehicle body panel to cause damage.

Further, the connector 30 is accommodated in the connector accommodating portion of the grommet 10 and located outside between the vehicle body panel and the door panel, and is in a position where it is exposed to water. Since no gap is generated between the connector 30 and the peripheral wall, the waterproof function can be maintained, and the infiltration of the connector 30 can be reliably prevented.

If there is no optional electric wire w2, the cover 22 of the inner sleeve 20 in which the connector 30 of the terminal of the standard electric wire w1 is fitted is kept covered on the peripheral wall 21 to accommodate the grommet connector. Part 15
It is housed and fixed. Thus, the optional wire w
Regardless of the presence or absence of the grommet 2, the grommet 10 including the inner sleeve 20 and the grommet body 11 can be used.

[0040]

As is apparent from the above description, according to the grommet of the present invention, even when the grommet main body accommodates the inner sleeve for holding the connector and the connector can be fixed inside the grommet, Optional wires can be passed through the inner sleeve. As described above, since the connector does not protrude out of the grommet, when the grommet is inserted into the through hole of the vehicle body panel,
Since the connector does not interfere with the peripheral panel of the through hole, the insertion workability can be improved and the connector is not damaged.

Further, the optional electric wire can be easily held on the inner sleeve with one touch simply by passing the optional electric wire through the inner sleeve and covering the cover with the hinge by bending the hinge. In addition, when the hinge is bent, the guide projection provided on the peripheral wall guides the locking projection provided on the cover portion of the inner sleeve, so that the cover portion can be covered on the peripheral wall without displacement. Thereby, the locking flange portion between the cover portion and the peripheral wall can be continuously inserted into the locking groove of the connector accommodating portion without any gap, so that the waterproof function is not reduced. Furthermore, when the locking projection is dropped into the guide projection and positioned and held, the option electric wire can be firmly held on the inner sleeve.

In addition, since the guide projections are provided on both outer surfaces of the connector lock section of the peripheral wall to guide the locking projections of the cover section, the guide sections project into the insertion space of the optional electric wires. Therefore, a wide space for inserting the option electric wire can be secured. Further, since the grommet can be shared regardless of the presence or absence of the optional wires, the number of parts can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a grommet of the present invention.

FIGS. 2A and 2B are cross-sectional views showing a state where an inner sleeve is fixed to a connector accommodating portion.

FIG. 3 is an exploded perspective view of an inner sleeve and a connector.

4A and 4B show a state in which a cover portion of an inner sleeve is opened, wherein FIG. 4A is a plan view, FIG. 4B is a cross-sectional view taken along line V-V of FIG. 4A, and FIG. Line sectional view, (D)
Is a front view.

FIG. 5A is a cross-sectional view showing a state where an optional electric wire is passed through an inner sleeve in which a connector is fitted;
(B) is a sectional view showing a state in which the cover is covered with the option electric wire.

6 (A) to 6 (D) are drawings showing the operation of both the left and right sides in the step of covering the cover portion of the inner sleeve on the peripheral wall.

FIG. 7 is a sectional view showing a conventional example.

[Explanation of symbols]

 P1 Door panel P2 Body panel H1, H2 Through hole S Insertion space for option electric wire 10 Grommet 11 Grommet body 15 Connector housing 15i Pin hole 20 Inner sleeve 20b Annular frame 20i Pin 21 Peripheral wall 21a-1 First guide projection 21a-2 Second guide projection 21b Locking flange 21c Thin hinge portion 21d Connector locking portion 21e Depression 21g Locking claw 22 Cover portion 22a-1 First locking projection 22a-2 Second locking projection 22b Locking collar 30 Connector 40 Optional wire connector w1 Standard wire w2 Optional wire

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H02G 3/38 H02G 3/28 F

Claims (3)

[Claims] 1. A grommet to be attached to a wire harness inserted into a through hole formed in a vehicle body panel of an automobile, wherein the grommet is provided at a distal end of an electric wire insertion cylinder portion through which the wire harness is inserted.
A grommet body made of an elastic material having a connector accommodating portion for accommodating a connector connected to the end of the wire group of the wire harness; and a resin-made resin fitted and locked in the connector accommodating portion while internally fitting and locking the connector. An inner sleeve is provided, a cover is protruded from a part of the peripheral wall of the inner sleeve via a thin hinge, and a space for inserting an optional electric wire is provided in a state where the cover is covered on the peripheral wall, and A locking piece having locking projections provided on both left and right sides of the inner surface of the cover portion, while a guide projection is provided on the outer surface side of the peripheral wall on which the cover portion is placed, and the guide projection is provided when the cover portion is placed on the peripheral wall. A grommet that is configured to prevent displacement of the cover by aligning the locking projections on the cover. 2. The guide projection is provided on both right and left sides of a connector lock portion projecting stepwise from a peripheral wall, and one guide projection is positioned along an upper surface of one of the locking projections. The grommet according to claim 1, wherein the guide projection on the other side is provided at a position along the lower surface of the locking projection on the other side. 3. The one-side guide projection along which the locking projection extends along the upper surface is provided with a recessed portion at a far end position, and the locking projection is provided at a final standing position where the cover portion covers the peripheral wall. The grommet according to claim 2, wherein the grommet is configured to be stably held by being depressed.