JP6749789B2 - Grommet inner, grommet, and wire harness - Google Patents

Description

The present invention relates to a grommet inner, a grommet, and a wire harness.

As a conventional grommet inner and a grommet applied to a wire harness of a vehicle, for example, in Patent Document 1, a plurality of grommet inner parts inserted into a fitting hole formed in a mounting panel and locked to an inner edge of the fitting hole are disclosed. There is disclosed a grommet consisting of a cylindrical grommet inner whose lock portion is provided on the outer side surface, and a cylindrical grommet outer that is coaxially attached to the end of the grommet inner and abuts and seals the mounting panel. There is. This grommet is provided with a plurality of centering portions on the outer surface of the grommet inner, which can elastically abut the inner edge of the fitting hole when the grommet inner is inserted into the fitting hole and position the grommet inner at the center of the fitting hole. ing.

JP, 2009-089587, A

By the way, the grommet described in Patent Document 1 has room for further improvement, for example, in terms of more reliable assembly in the fitting hole.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a grommet inner member, a grommet, and a wire harness that can be reliably assembled.

In order to achieve the above-mentioned object, the grommet inner according to the present invention includes a mounting portion to which a grommet outer that is in contact with a water stopping surface and can stop water between the water stopping surface is mounted, and the mounting portion. A fitting portion that is formed in an annular shape through which an electric wire can be inserted and that can be fitted into a through hole formed in the water stop surface, and an edge portion of the through hole that is formed to project from an outer surface of the fitting portion. An inner surface of the through hole, and a locking claw portion that can be locked to the inner surface of the through hole, and a deformation adjusting rib portion that is formed so as to project from the outer surface of the fitting portion and can contact the inner surface of the through hole. The outer surface of the fitting portion is symmetrical with respect to a reference point that is an intersection of a long axis and a short axis orthogonal to the long axis, and the length along the long axis is the short axis. Longer than the length along, and at least both ends in the long axis direction along the long axis are formed in a shape along an annular virtual contour line that is a curve, and the locking claw portion includes the long axis and the virtual Two long axis reference positions on the outer surface of the fitting portion, which are positions corresponding to two long axis intersections that intersect the contour line, and two short points that are intersection points between the short axis and the virtual contour line. At least one is provided in each of the curved surface portions in the four sections between the two minor axis reference positions of the outer surface of the fitting portion, which is a position corresponding to the axial intersection, and a total of four are provided, and the deformation adjusting rib portion is provided. Are provided at least one in four sections between the two long-axis reference positions and the four locking claws, four in total , and further, the deformation adjusting ribs are the edges of the through holes. The deformation adjusting rib portion is a crushing rib portion that can be crushed by a portion, and the amount of protrusion from the outer surface of the fitting portion when the fitting portion is not fitted in the through hole is It is characterized in that it is formed so as to have a distance equal to or greater than the distance between the outer surface and the inner surface of the through hole at the position .

Further, in the grommet inner, the four locking claw portions and the four deformation adjusting rib portions may be formed at positions symmetrical with respect to the reference point.

Further, in the grommet inner, the deformation adjusting rib portion may be a crushing rib portion that can be crushed by an edge portion of the through hole.

In addition, in the grommet inner, the fitting portion is an end locking portion that is provided on a curved surface portion on one side of the two long axis reference positions and that is capable of locking mutually open open ends. , the two provided on the other side curved surface portion of the long axis reference position possess a fulcrum in the open fulcrum of the open end portion, the fulcrum portion, one of said open ends relative the fulcrum Side and the other open end side are connected in a relatively openable and closable manner to form a hinge shape, and when the open end is opened, one open end side and the other open end side The fitting portion is capable of mutually locking the open end portion by the end locking portion, and releases the lock of the open end portion of the end locking portion. Thus, the open end portions can be mutually opened while bending the whole with the fulcrum portion as a base point, and the two deformation adjusting rib portions on one side in the longitudinal direction are the outer surface of the fitting portion. Is formed at a position sandwiching the end locking portion with respect to the circumferential direction, and the two deformation adjusting rib portions on the other side in the major axis direction are arranged with respect to the circumferential direction of the outer surface of the fitting portion. It may be formed at positions sandwiching the fulcrum portion .

In order to achieve the above object, the grommet according to the present invention is a grommet outer that is in contact with a water-stopped surface and can stop water between the water-stopped surface, a mounting portion to which the grommet outer is mounted, and the mounting. A fitting part that is formed in an annular shape that is capable of inserting an electric wire integrally with the fitting part and that can fit into a through hole formed in the water-stopped surface; And a grommet inner having a locking claw portion that can be locked to the edge portion and a deformation adjusting rib portion that is formed to project from the outer surface of the fitting portion and that can contact the inner surface of the through hole. The inner surface of the through hole and the outer surface of the fitting portion are symmetrical with respect to a reference point that is an intersection of a long axis and a short axis orthogonal to the long axis, and along the long axis. Is longer than the length along the minor axis, and at least both ends in the major axis direction along the major axis are formed in a shape along an annular virtual contour line that is a curve, and the locking claw portion is formed. Are the two major axis reference positions on the outer surface of the fitting portion, which are the positions corresponding to the two major axis intersections that are the intersections of the major axis and the virtual contour line, the minor axis and the virtual contour line. At least one on each curved surface portion in the four sections between the two short axis reference positions on the outer surface of the fitting portion, which are the positions corresponding to the two short axis intersections that are At least one deformation adjusting rib portion is provided in each of four sections between the two long axis reference positions and the four locking claw portions, and a total of four deformation adjusting rib portions are provided. The portion is a crushing rib portion that can be crushed by the edge portion of the through hole, and in a state where the grommet inner is not fitted in the through hole, the amount of protrusion from the outer surface of the fitting portion is It is characterized in that it is formed so as to be at least a distance between the outer surface and the inner surface of the through hole at the position where the deformation adjusting rib portion is provided .

In order to achieve the above object, the wire harness according to the present invention is equipped with an electric wire, a grommet outer that is in contact with a water-stopped surface and can stop water between the water-stopped surface, and the grommet outer. A grommet having a grommet inner, wherein the grommet inner is a mounting part to which the grommet outer is mounted, is formed in an annular shape that is integral with the mounting part and through which the electric wire can be inserted, and is a penetrating hole formed in the water to be stopped surface. From a fitting portion that can be fitted into the hole, a locking claw portion that projects from the outer surface of the fitting portion and that can be locked to the edge of the through hole, and from the outer surface of the fitting portion. It has a deformation adjusting rib portion that is formed to project and is capable of contacting the inner surface of the through hole, and the inner surface of the through hole and the outer surface of the fitting portion are orthogonal to the major axis and the major axis. Symmetrical with respect to a reference point that is an intersection with the minor axis, and the length along the major axis is longer than the length along the minor axis, and at least the major axis direction along the major axis. Is formed in a shape along an annular virtual contour line that is a curved line, and the locking claw portion is at a position corresponding to two long axis intersections that are intersections of the long axis and the virtual contour line. Two short axis reference positions on the outer surface of the fitting portion, and two short sides of the outer surface of the fitting portion, which are positions corresponding to the two short axis intersections that are the intersections of the short axis and the virtual contour line. At least one is provided in each curved surface portion in the four sections between the shaft reference position, and a total of four are provided, and the deformation adjusting rib portion includes the two long axis reference positions and the four locking claw portions. At least one is provided in each of the four sections, and a total of four are provided. The deformation adjusting rib portion is a crushing rib portion that can be crushed by the edge portion of the through hole, and the grommet inner is the through hole. So that the amount of protrusion from the outer surface of the fitting portion is equal to or greater than the distance between the outer surface and the inner surface of the through hole at the position where the deformation adjusting rib portion is provided. It is characterized in that it is formed in .

The grommet inner, the grommet, and the wire harness according to the present invention are such that the fitting portion of the grommet inner fits into the through hole formed in the water stop surface and is locked to the edge portion of the through hole by the locking claw portion. The grommet outer mounted on the mounting portion of the grommet inner comes into contact with the water-stopped surface to stop the water from the water-stopped surface. Then, the grommet inner, the grommet, and the wire harness, for example, even when the grommet inner relatively rotates with respect to the through hole and twist occurs, deformation of the fitting portion of the grommet inner according to the twist. By adjusting the deformation adjusting rib portion, it is possible to maintain the engagement state between each engagement claw portion and the edge portion of the through hole in an appropriate state. As a result, the grommet inner member, the grommet member, and the wire harness can be reliably assembled.

FIG. 1 is a sectional perspective view showing a schematic configuration of a grommet according to the embodiment. FIG. 2 is an exploded perspective view showing a schematic configuration of the grommet according to the embodiment. FIG. 3 is an exploded perspective view showing a schematic configuration of the grommet according to the embodiment. FIG. 4 is a partial cross-sectional view including a locking claw portion of the grommet according to the embodiment. FIG. 5 is a perspective view showing a schematic configuration of the grommet according to the embodiment. FIG. 6 is a partial cross-sectional view including a deformation adjusting rib portion of the grommet according to the embodiment. FIG. 7: is a schematic diagram explaining the virtual outline in the grommet which concerns on embodiment. FIG. 8 is a plan view of the fitting portion side of the grommet according to the embodiment. FIG. 9 is a partial perspective view including a deformation adjusting rib portion of the grommet according to the embodiment. FIG. 10 is a partial perspective view including the deformation adjusting rib portion of the grommet according to the embodiment. FIG. 11: is a schematic diagram explaining the virtual outline in the grommet which concerns on a modification.

Embodiments according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to this embodiment. In addition, constituent elements in the following embodiments include elements that can be easily replaced by those skilled in the art, or substantially the same elements.

[Embodiment]
The grommet 1 of the present embodiment shown in FIG. 1 is incorporated into a wire harness WH that is installed in a vehicle or the like, and is partitioned with the mounting panel 100 as a boundary via a through hole 101 formed in the mounting panel 100. It is applied to the through hole 101 when the electric wire W is routed over two spaces. The mounting panel 100 is, for example, a metal plate that forms a vehicle body or the like, and the through hole 101 penetrates the mounting panel 100 in the plate thickness direction. The two spaces partitioned by the mounting panel 100 and the like are, for example, a vehicle interior space and a vehicle exterior space. Here, the wire harness WH is, for example, a bundle of a plurality of electric wires W used for power supply and signal communication for connection between respective devices mounted on a vehicle to be a collective component, and a plurality of electric wires such as a connector. W is connected to each device at once. The wire harness WH includes an electric wire W and a grommet 1 into which the electric wire W is inserted. The electric wire W is configured to include, for example, a conductor portion (core wire) in which a plurality of conductive metal element wires are twisted together, and an insulating coating portion that covers the outside of the conductor portion. In the wire harness WH, various devices are bundled together and collected, and various devices are electrically connected to an end of the bundled wires W via a connector or the like as a connecting portion. Then, the grommet 1 is assembled in the through hole 101 in a state where the electric wire W of the wire harness WH is inserted and is exteriorly wrapped around the electric wire W, and is attached to the water blocking surface 102 formed by one surface of the mounting panel 100. By being closely attached, the electric wire W passing through the through hole 101 is protected and the through hole 101 is waterproofed. The grommet 1 has not only waterproofing of the through hole 101 but also functions of dustproofing, sound insulation, and the like. Hereinafter, the configuration of the grommet 1 will be described in detail with reference to the drawings. In addition, the wire harness WH may be configured to include various other components such as a corrugated tube, a resin tape, an exterior member such as a protector, an electrical connection box, and a fixture.

In the following, for convenience of explanation, of the first direction, the second direction, and the third direction that intersect each other for convenience, the first direction is referred to as the “axial direction X”, and the second direction. Is referred to as "major axis direction Y", and the third direction is referred to as "minor axis direction Z". Typically, the axial direction X as the first direction, the major axis direction Y as the second direction, and the minor axis direction Z as the third direction are orthogonal to each other. Here, the axial direction X corresponds to the plate thickness direction of the mounting panel 100, and the major axis direction Y and the minor axis direction Z correspond to the extending direction of the mounting panel 100. The through hole 101 penetrates the mounting panel 100 in the axial direction X, and allows the electric wire W to penetrate through the two spaces defined on both sides in the axial direction X with the mounting panel 100 as a boundary. Unless otherwise specified, each direction used in the following description is a direction in a state where the respective parts of the grommet 1 are assembled with each other and the grommet 1 is assembled with the through hole 101 of the mounting panel 100.

Specifically, the grommet 1 of the present embodiment includes a grommet outer 2 and a grommet inner 3 as shown in FIGS. 1, 2, and 3, and a deformation adjusting rib is provided at a predetermined position of the grommet inner 3. By providing the portion 33, more reliable assembly is realized. The grommet 1 is formed such that the grommet outer 2 has relatively higher flexibility than the grommet inner 3 and the grommet inner 3 has relatively higher rigidity than the grommet outer 2. To be done.

The grommet outer 2 is a seal member that is attached to the grommet inner 3 and has an electric wire W inserted therein, contacts the water-stopped surface 102, and can stop water from the water-stopped surface 102. The grommet outer 2 includes a main body portion 21, a tubular portion 22, and a lip portion 23, which are integrally formed as an elastic body. The grommet outer 2 is formed of a flexible elastic material having low rigidity (for example, ethylene-propylene-diene rubber (EPDM)) such as rubber and thermoplastic elastomer.

The main body portion 21 is a portion that forms a pedestal portion on which the tubular portion 22 and the lip portion 23 are provided. The main body portion 21 includes a tubular portion 21a, a closed end surface portion 21b, and a flange portion 21c, and is formed into a dome shape as a whole. The tubular portion 21a is formed in an annular shape whose axis is along the axial direction X, here, a tubular shape. The tubular portion 21a of the present embodiment is formed in a substantially oval shape in which the major axis direction Y is the longitudinal direction when viewed along the axial direction X (hereinafter, may be referred to as “axial direction view”). .. The tubular portion 21a is closed on one side in the axial direction X by the closed end surface portion 21b, while being open on the other side in the axial direction X. In the main body portion 21, an internal space portion defined by the tubular portion 21a and the closed end surface portion 21b constitutes a fitting insertion space portion 21d. The fitting insertion space portion 21d is a space portion into which the grommet inner 3 is fitted and the electric wire W is inserted. The flange portion 21c is formed on the inner peripheral surface of the tubular portion 21a as an annular plate-shaped portion whose axis extends along the axial direction X. The flange portion 21c is formed on the inner peripheral surface of the tubular portion 21a at an end portion on the closed end surface portion 21b side and at a position spaced from the closed end surface portion 21b along the axial direction X. The flange portion 21c is formed over the entire circumference of the inner peripheral surface of the tubular portion 21a.

The tubular portion 22 is a portion that is formed in a tubular shape and has the electric wire W inserted therein. The tubular portion 22 is formed in a cylindrical tubular shape, and the internal space portion forms the insertion space portion 22a. The insertion space portion 22a is a space portion through which the electric wire W is inserted. One end of the tubular portion 22 is connected to the closed end surface portion 21b of the main body portion 21 and opens toward the fitting insertion space portion 21d. Here, the tubular portion 22 is bent at the end portion on the closed end surface portion 21b side and extends along the major axis direction Y. In the grommet outer 2, a fitting insertion space portion 21d that is an internal space portion of the main body portion 21 and an insertion space portion 22a that is an internal space portion of the tubular portion 22 communicate with each other, and the fitting insertion space portion 21d and the insertion space portion The electric wire W is inserted across the portion 22a.

The lip portion 23 is a portion that comes into contact with the water-stopped surface 102 to stop water from the water-stopped surface 102. Here, the lip portion 23 is configured to include a first lip portion 23a and a second lip portion 23b. The first lip portion 23a is formed in a ring shape over the entire circumference of the opening of the tubular portion 21a of the main body portion 21 on the other side in the axial direction X (the side opposite to the closed end surface portion 21b side). The second lip portion 23b is formed in a ring shape inside the first lip portion 23a, here, over the entire circumference of the flange portion 21c. The first lip portion 23a and the second lip portion 23b extend along the axial direction on the side opposite to the closed end surface portion 21b side, and are formed such that their tip ends are curved toward the outer peripheral side. The first lip portion 23a and the second lip portion 23b are in contact with the water-stopped surface 102 at the peripheral edge of the through hole 101 by elastic deformation while the grommet 1 is mounted in the through hole 101, and the entire peripheral edge of the through hole 101 is covered. Configured to seal.

The grommet inner 3 is a fitting member into which the grommet outer 2 is mounted, the electric wire W is inserted inside, and which can be fitted into the through hole 101. The grommet inner 3 includes a main body portion 31, a locking claw portion 32, and a deformation adjusting rib portion 33, which are integrally formed as a rigid body having higher rigidity than the grommet outer 2. The grommet inner 3 is formed of, for example, a synthetic resin material such as polypropylene (PP) having higher rigidity than the grommet outer 2.

The body portion 31 is a portion to which the grommet outer 2 is attached and which is fitted into the through hole 101. The main body portion 31 is configured to include the mounting portion 34 and the fitting portion 35, and is formed in a generally oval annular shape into which the electric wire W can be inserted.

The mounting portion 34 is a portion of the main body portion 31 to which the grommet outer 2 is mounted. The mounting portion 34 is formed in a frame plate shape whose axial direction X is the plate thickness direction. The mounting portion 34 is formed in a shape corresponding to the shape of the main body portion 21 of the grommet outer 2, and here is formed as a substantially C-shaped plate-like flange portion whose axis is along the axial direction X. In other words, the mounting portion 34 is formed in a substantially elliptical frame shape whose longitudinal direction is the longitudinal direction Y, similarly to the tubular portion 21a of the main body portion 21 of the grommet outer 2, and on which the longitudinal direction is set. It has a shape having a notch 34a that penetrates the frame-shaped portion in the major axis direction Y at one end (vertex) of Y. The mounting portion 34 is mounted on the grommet outer 2 in a positional relationship in which the mounting portion 34 is positioned and held between the closed end surface portion 21b of the body portion 21 of the grommet outer 2 and the flange portion 21c in the axial direction X.

The fitting portion 35 is formed in an annular shape through which the electric wire W can be inserted, and is a portion of the main body portion 31 that can be fitted into the through hole 101. The fitting portion 35 is formed in an annular shape whose axis is along the axial direction X, here, in a cylindrical shape. The fitting portion 35 of the present embodiment is formed in a substantially oval shape with the major axis direction Y being the longitudinal direction when viewed in the axial direction. Here, the fitting portion 35 is formed as a substantially oval-shaped double wall body, but is not limited to this and may not be a double wall body. The fitting portion 35 is integrally formed with the mounting portion 34 at one end on the one side in the axial direction X. The fitting portion 35 has an inner side surface (inner peripheral surface) 35 a side substantially aligned with the mounting portion 34, and an outer side surface (outer peripheral surface) 35 b side smaller than the mounting portion 34. In the body portion 31, the inner space portion of the mounting portion 34 and the fitting portion 35 constitutes the insertion space portion 31a. The insertion space portion 31a is a space portion through which the electric wire W is inserted. The fitting portion 35 has a locking claw portion 32 and a deformation adjusting rib portion 33, which will be described later, formed on the surface opposite to the insertion space portion 31a, that is, on the outer surface 35b.

Further, the fitting portion 35 includes an end locking portion 35c provided at one end (vertex) in the major axis direction Y and a fulcrum portion 35d provided at the other end (vertex) in the major axis direction Y. Have. Here, in the main body portion 31 of the present embodiment, the mounting portion 34 and the fitting portion 35 are cut at one end portion in the longitudinal direction Y, and an open end that is an end portion formed in the cut portion. The parts 31b and 31c are configured to be openable to each other. The cut portion of the main body portion 31 is formed along the axial direction X across the mounting portion 34 and the fitting portion 35, that is, the open ends 31b and 31c extend across the mounting portion 34 and the fitting portion 35. Formed. The end locking portion 35c is a portion of the fitting portion 35 that can lock the open ends 31b and 31c with each other. The end locking portion 35c is, for example, a claw portion 35e formed on one of the open end portions 31b and 31c and a locked portion formed on the other of the open end portions 31b and 31c to lock the claw portion 35e. 35f. The fulcrum portion 35d is formed in the fitting portion 35 at a position facing the above-described cutout 34a in the axial direction X. The fulcrum portion 35d is a portion that serves as an open fulcrum of the open end portions 31b and 31c in the fitting portion 35. The fulcrum portion 35d connects the open end portion 31b side and the open end portion 31c side relative to each other so that the open end portion 31b and the open end portion 31c side can be relatively opened and closed, and when the open end portions 31b and 31c are opened, the open end portion 31b side. Serves as a base point (fulcrum) of bending between the open end portion 31c side. Here, the fulcrum portion 35d is formed in a hinge shape in which a ridge line is folded back into a curved surface in a positional relationship such that the ridge line extends along the axial direction X. The body portion 31 can lock the open end portions 31b and 31c with each other by the end locking portion 35c, while releasing the lock of the open end portions 31b and 31c in the end locking portion 35c. The open ends 31b and 31c can be opened to each other while bending the whole with the fulcrum portion 35d as a fulcrum. The main body portion 31 has a generally oval annular shape as a whole in a state where the open end portions 31b and 31c are locked to each other by the end locking portion 35c.

The locking claw portion 32 is a lock portion that is formed to project from the outer side surface 35 b of the fitting portion 35 and that can be locked to the edge portion of the through hole 101. The locking claw portion 32 is formed in a claw shape that can be locked to the edge portion of the through hole 101. Here, more specifically, the locking claw portion 32 has an arm portion 32a that extends from the outer side surface 35b toward the outside (the side opposite to the insertion space portion 31a side) so as to project, as shown in FIG. , And a claw portion 32b formed at the tip of the arm portion 32a. The arm portion 32a is a flexible arm-shaped portion, and extends in the axial direction X from an end of the outer surface 35b of the fitting portion 35 opposite to the mounting portion 34 side in the axial direction X. It is formed so as to extend toward the mounting portion 34 side along. The claw portion 32b is formed in a claw shape protruding outward (on the side opposite to the insertion space portion 31a side) from the tip end portion of the arm portion 32a. The claw portion 32b constitutes a locking surface 32c in which the surface on the mounting portion 34 side in the axial direction X is in contact with the edge portion of the through hole 101 and locked. Four locking claw portions 32 of the present embodiment are formed on the outer side surface 35b of the fitting portion 35.

The deformation adjusting rib portion 33 is a portion that is formed so as to project from the outer side surface 35 b of the fitting portion 35 and can come into contact with the inner surface 101 a of the through hole 101. The deformation adjusting rib portion 33 is formed so as to extend along the axial direction X. More specifically, the deformation adjusting rib portion 33 extends at least along the axial direction X from the mounting portion 34 to a position beyond the formation position of the locking surface 32c. As shown in FIGS. 5 and 6, the deformation adjusting rib portion 33 is provided between the outer surface 35 b of the fitting portion 35 and the inner surface 101 a of the through hole 101 in a state where the grommet inner 3 is fitted in the through hole 101. It is formed so as to be able to come in contact with the inner surface 101a of the through hole 101. The deformation adjusting rib portion 33 is formed, for example, in a triangular shape, a semicircular shape, a rectangular shape, or the like in a sectional shape in a direction orthogonal to the axial direction X. Here, as an example, as shown in FIG. 6, the deformation adjusting rib portion 33 has a triangular cross-section. Four deformation adjusting rib portions 33 of the present embodiment are formed on the outer side surface 35b of the fitting portion 35.

Regarding the positional relationship among the shape of the through hole 101, the shape of the outer side surface 35b of the fitting portion 35 of the grommet inner 3, the locking claw portion 32, the deformation adjusting rib portion 33, the end locking portion 35c, the fulcrum portion 35d, and the like. Will be described in detail later.

The grommet 1 configured as described above is typically assembled in the through hole 101 after the grommet outer 2 and the grommet inner 3 are attached to the electric wire W. For example, in the grommet inner 3, the electric wire W is inserted into the insertion space 31a in a state where the open end portions 31b and 31c of the end engaging portion 35c are unlocked and the open end portions 31b and 31c are opened to each other. After that, the open end portions 31b and 31c are locked to each other by the end locking portion 35c. Thereby, the grommet inner 3 can easily insert the electric wire W into the insertion space 31a even when a connector or the like is provided at the end of the electric wire W. In this case, the grommet outer 2 is able to insert the electric wire W into the fitting insertion space 21d and the insertion space 22a together with the connector at the end of the electric wire W while elastically deforming and expanding the tubular portion 22 and the like. it can. In the grommet 1, the mounting portion 34 of the grommet inner 3 and the fitting portion 35 are fitted in the fitting insertion space portion 21d of the main body portion 21 of the grommet outer 2, and the mounting portion 34 is the closed end surface of the main body portion 21. The grommet outer 2 is mounted on the mounting portion 34 by being positioned and held between the portion 21b and the flange portion 21c, and the grommet outer 2 and the grommet inner 3 are integrated. Then, the fitting portion 35 of the grommet inner 3 is fitted into the grommet 1 by being pushed into the through hole 101 from the water stop surface 102 side of the mounting panel 100. At this time, the grommet 1 is flexibly fitted by bending the arm portions 32a of the respective locking claw portions 32 of the grommet inner 3 against the edge portions of the through holes 101, and the claw portions 32b of the respective locking claw portions 32. Completely advances to the other side of the mounting panel 100 (the side opposite to the water stop surface 102), the bent arm portion 32a returns to its original position, and the locking surface 32c of each locking claw portion 32 is released. It is locked to the edge (see FIGS. 4 and 5). As a result, the grommet 1 is completely attached to the through hole 101. The grommet 1 has a first lip portion 23a and a second lip portion 23a in a state where the fitting portion 35 of the grommet inner 3 is fitted in the through hole 101 and each locking claw portion 32 is locked at the edge portion of the through hole 101. The portion 23b is elastically deformed and comes into close contact with the water stop surface 102 at the peripheral edge of the through hole 101 to seal the entire peripheral edge of the through hole 101. Further, in this state, in the grommet 1, the deformation adjusting rib portion 33 is interposed between the outer surface 35b of the fitting portion 35 and the inner surface 101a of the through hole 101 and contacts the inner surface 101a of the through hole 101 (FIG. 5). , See FIG. 6).

Then, in the grommet inner 3 of the present embodiment, as shown in FIGS. 7, 8, 9, and 10, the inner surface 101a of the through hole 101 and the outer surface 35b of the fitting portion 35 are arranged along the virtual contour line L1. By being formed and the locking claw portion 32 and the deformation adjusting rib portion 33 are provided so as to have a predetermined positional relationship on the virtual contour line L1, more reliable assembly is realized.

Here, as shown in FIG. 7, the virtual contour line L1 is point-symmetrical (in other words, the long axis L2) with respect to the reference point P1 which is the intersection of the long axis L2 and the short axis L3 orthogonal to the long axis L2. L2 and a line symmetric with respect to the short axis L3), the length along the long axis L2 is longer than the length along the short axis L3, and at least the long axis direction along the long axis L2. Are set in advance as a ring-shaped virtual line whose both ends are curved. Here, the major axis L2 is an axis line along the major axis direction Y, and the minor axis L3 is an axis line along the minor axis direction Z. The virtual contour line L1 of this embodiment is formed as an oval shape. Here, the oval shape is typically defined as a shape including a pair of opposing straight line portions along the long axis L2 and a curved portion on a substantially arc connecting the pair of straight line portions. You can

The inner surface 101a of the through hole 101 and the outer surface 35b of the fitting portion 35 are formed in a shape along the virtual contour line L1, that is, here, are formed to have an elliptical shape when viewed in the axial direction. .. In FIG. 7, the inner surface 101a of the through hole 101 and the outer surface 35b of the fitting portion 35 are located outside the virtual contour line L1 with the inner surface 101a in the state where the grommet inner 3 is fitted in the through hole 101. , The outer surface 35b is shown as being located inside the virtual contour line L1 and facing each other, but the inner/outer relationship between the inner surface 101a and the outer surface 35b with respect to the virtual contour line L1 is not limited to this. It suffices if they are located on the outer side of the outer side surface 35b and have a shape substantially along the virtual contour line L1. Further, here, the tubular portion 21a of the grommet outer 2, the flange portion 21c, the first lip portion 23a, the second lip portion 23b, the mounting portion 34 of the grommet inner 3, the inner surface 35a of the fitting portion 35, and the like are also virtual. The grommet 1 is formed to have a shape along the contour line L1, that is, to have an oval shape when viewed in the axial direction, and the entire grommet 1 is formed to have an oval shape when viewed in the axial direction. In the grommet 1, the inner surface 35a of the fitting portion 35, the outer surface 35b of the fitting portion 35, the inner surface 101a of the through hole 101, the second lip portion 23b, and the first lip portion 23a are stepped in this order from the reference point P1 side. It is formed to have a large oval shape.

Then, as shown in FIGS. 7 and 8, the locking claw portion 32 has four positions between the two long axis reference positions P2 and the two short axis reference positions P3 on the outer side surface 35b of the fitting portion 35. At least one is provided for each curved surface portion in the section, and a total of four are provided. The two long-axis reference positions P2 are positions corresponding to the two long-axis intersection points P21 which are the intersections of the long axis L2 and the virtual contour line L1. The long-axis intersection point P21 corresponds to both vertices of the virtual contour line L1 in the long-axis direction Y. The two short axis reference positions P3 are positions corresponding to the two short axis intersections P31 which are the intersections of the short axis L3 and the virtual contour line L1. The minor axis intersection point P31 corresponds to the midpoint of the straight line portion in the elliptical shape. The four locking claw portions 32 of the present embodiment are formed at positions symmetrical with respect to the reference point P1 (in other words, positions symmetrical with respect to the long axis L2 and the short axis L3).

Further, as shown in FIGS. 7 and 8, the deformation adjusting rib portion 33 is provided at least in four sections between the two long axis reference positions P2 and the four locking claw portions 32 arranged as described above. A total of four are provided, one for each. The four deformation adjusting rib portions 33 of the present embodiment are formed at positions symmetrical with respect to the reference point P1 (in other words, positions symmetrical with respect to the major axis L2 and the minor axis L3).

Here, the above-described end locking portion 35c is provided on the curved surface portion on one side of the two long axis reference positions P2 as shown in FIGS. 7 and 8 and the fulcrum portion 35d includes the two long axes. It is provided on the curved surface portion on the other side of the reference position P2. The two deformation adjusting rib portions 33 on one side of the major axis direction Y sandwich the end locking portion 35c with respect to the circumferential direction of the outer side surface 35b, as shown in FIGS. 7, 8, 9 and the like. Formed in position. Further, the two deformation adjusting rib portions 33 on the other side in the major axis direction Y are formed at positions sandwiching the fulcrum portion 35d with respect to the circumferential direction of the outer side surface 35b, as shown in FIGS. 7, 8, 10, and the like. To be done.

Further, each deformation adjusting rib portion 33 of the present embodiment is formed as a so-called crushing rib portion that can be crushed by the edge portion of the through hole 101. Here, each deformation adjusting rib portion 33 has a protrusion amount D1 (see FIG. 9) from the outer side surface 35b when the grommet inner 3 is not fitted in the through hole 101. It is formed so as to be equal to or more than the distance D2 (see FIG. 7) between the outer surface 35b and the inner surface 101a at the provided position (D1≧D2). Thereby, each deformation adjusting rib portion 33 is crushed by the edge portion of the through hole 101 in accordance with the operation of fitting the fitting portion 35 of the grommet inner 3 into the through hole 101, and there is almost no gap with the inner surface 101a. You can Note that the maximum value of the protrusion amount D1 is limited to the range in which the fitting portion 35 can be fitted into the through hole 101.

According to the grommet inner 3 described above, the mounting portion 34 to which the grommet outer 2 that is in contact with the water-stopped surface 102 and can stop the water between the water-stopped surface 102 is mounted, and the mounting portion 34 are integrated. The fitting portion 35 is formed in an annular shape through which the electric wire W can be inserted and can be fitted into the through hole 101 formed in the water blocking surface 102, and the through hole 101 formed to project from the outer surface 35b of the fitting portion 35. A locking claw portion 32 that can be locked to the edge of the fitting portion 35, and a deformation adjusting rib portion 33 that is formed to project from the outer surface 35b of the fitting portion 35 and that can contact the inner surface 101a of the through hole 101. The inner surface 101a of the through hole 101 and the outer surface 35b of the fitting portion 35 are symmetrical with respect to a reference point P1 which is an intersection of the long axis L2 and the short axis L3 orthogonal to the long axis L2, and The shape along the long axis L2 is longer than the length along the short axis L3, and at least both ends in the long axis direction Y along the long axis L2 are formed in a shape along an annular virtual contour line L1 which is a curve. Then, the locking claw portion 32 has two long axis reference positions P2 on the outer side surface 35b of the fitting portion 35, which are positions corresponding to the two long axis intersections P21 which are the intersections of the long axis L2 and the virtual contour line L1. And four short axis reference positions P3 on the outer surface 35b of the fitting portion 35, which are positions corresponding to the two short axis intersections P31 that are the intersections of the short axis L3 and the virtual contour line L1. At least one is provided in each curved surface portion in 4 and a total of four are provided, and at least one deformation adjusting rib portion 33 is provided in each of four sections between the two long-axis reference positions P2 and the four locking claw portions 32. , A total of four are provided. According to the grommet 1 described above, the grommet outer 2 that is in contact with the water-stopped surface 102 and can stop the water between the water-stopped surface 102 and the grommet inner 3 to which the grommet outer 2 is mounted are provided. .. According to the wire harness WH described above, the grommet outer 2 which is in contact with the water stop surface 102 and can stop the water between the water stop surface 102, and the grommet outer 2 are mounted. And a grommet 1 having a grommet inner 3.

Therefore, in the grommet inner 3, the grommet 1, and the wire harness WH, the fitting portion 35 of the grommet inner 3 fits into the through hole 101 formed in the water stop surface 102, and the edge of the through hole 101 is locked by the locking claw portion 32. The grommet outer 2 mounted on the mounting portion 34 of the grommet inner 3 comes into contact with the water stop surface 102 to stop the water between the water stop surface 102 and the water stop surface 102. Then, the grommet inner 3, the grommet 1, and the wire harness WH, for example, even when the grommet inner 3 relatively rotates with respect to the through hole 101 and twist occurs, the inner surface 101 a of the through hole 101, the fitting portion 35. The outer side surface 35b of the is formed along the virtual contour line L1, and the locking claw portion 32 and the deformation adjusting rib portion 33 are provided so as to have the above-described positional relationship with respect to the virtual contour line L1. The deformation of the fitting portion 35 of the grommet inner 3 according to the twist is adjusted by the deformation adjusting rib portion 33, whereby the locking state of each locking claw portion 32 and the edge of the through hole 101 is in an appropriate state. Can be maintained at.

For example, when the grommet inner 3 rotates counterclockwise relative to the through hole 101 as shown by an arrow A in FIG. 8, the grommet inner 3 passes through as shown by an arrow A1 in FIG. Due to the inner surface 101a of the hole 101, the upper left deformation adjusting rib portion 33 in FIG. 8 and the deformation adjusting rib portion 33 located opposite to the deformation adjusting rib portion 33 with the reference point P1 interposed therebetween are located. A pressing force is applied in the direction of approaching each other. As a result, as shown by the arrow A2 in FIG. 8, the grommet inner 3 is pressed in a direction in which the two deformation adjusting rib portions 33 approach each other, and thus the two deformation adjusting rib portions 33 approaching each other. With respect to the long axis L2 and the short axis L3, two locking claws 32 located on the opposite side, here, the locking claw 32 on the upper right in FIG. On the other hand, an expansion force acts in a direction in which the locking claw portions 32 located opposite to each other across the reference point P1 and toward the outside (the side opposite to the insertion space portion 31a side) are separated from each other. To do. Therefore, the grommet inner 3 has the two locking claw portions by the expansion force that acts on the two locking claw portions 32 as the pressing force is applied to the two deformation adjusting rib portions 33. 32 deforms toward the outside so that they are separated from each other. That is, in the grommet inner 3, the engagement margins between the engagement surfaces 32c of the two engagement claws 32 and the edge of the through hole 101 are not reduced by the action of the two approaching deformation adjusting ribs 33. It can be transformed.

On the contrary, in the grommet inner 3, as shown by the arrow B in FIG. 8, when the grommet inner 3 rotates in the opposite direction, that is, when the grommet inner 3 rotates clockwise relative to the through hole 101, As shown by an arrow B1 in FIG. 8, the inner surface 101a of the through hole 101 causes the deformation adjusting rib portion 33 on the upper right in FIG. 8 and the deformation adjusting rib portion 33 on the opposite side with the reference point P1 interposed therebetween. A pressing force is applied in a direction in which the deformation adjusting rib portions 33 located opposite to each other approach each other. As a result, as shown by the arrow B2 in FIG. 8, the grommet inner 3 is pressed in the direction in which the two deformation adjusting rib portions 33 approach each other, so that the two deformation adjusting rib portions 33 approaching each other. With respect to the long axis L2 and the short axis L3, the two locking claw portions 32 located on the opposite side, here, the upper left locking claw portion 32 in FIG. 8 and the locking claw portion 32. On the other hand, an expansion force acts in a direction in which the locking claw portions 32, which are located opposite to each other with the reference point P1 sandwiched therebetween, are separated from each other toward the outside, and are deformed. That is, also in this case, in the grommet inner 3, the engagement margin between the locking surface 32c of the two locking claws 32 and the edge of the through hole 101 is not reduced by the action of the two approaching deformation adjusting ribs 33. Can be deformed in any direction.

As a result, the grommet inner 3, the grommet 1, and the wire harness WH stably maintain a state in which the engagement margin between the engagement surface 32c of each engagement claw 32 and the edge of the through hole 101 is sufficiently secured. Therefore, the locking state between each locking claw portion 32 and the edge of the through hole 101 can be maintained in an appropriate state, and the grommet inner 3 can be reliably assembled to the through hole 101. Further, here, in the grommet inner 3, the grommet 1, and the wire harness WH, at least one deformation adjusting rib portion 33 is provided in each of four sections between the two long axis reference positions P2 and the four locking claw portions 32. Therefore, as described above, the grommet inner 3 and the through hole 101 can cope with relative rotation in both directions, and also in this respect, the grommet inner 3 can be reliably assembled to the through hole 101.

Further, in the grommet inner 3, the grommet 1, and the wire harness WH, the respective deformation adjusting rib portions 33 are interposed between the outer surface 35 b of the fitting portion 35 and the inner surface 101 a of the through hole 101 and the inner surface 101 a of the through hole 101. By abutting, it also functions as a backlash reducing rib portion in the major axis direction Y and the minor axis direction Z, and the required gap can be reduced. Thereby, the grommet inner 3, the grommet 1, and the wire harness WH can suppress relative movement (offset) between the grommet inner 3 and the through hole 101 with respect to the long-axis direction Y and the short-axis direction Z. Also, since it is possible to maintain a state in which the engagement margin between the engagement surface 32c of each engagement claw 32 and the edge of the through hole 101 is sufficiently ensured, in this respect as well, the engagement claw 32 and the penetration portion are penetrated. The locked state with the edge of the hole 101 can be maintained in an appropriate state, and the grommet inner 3 can be reliably assembled to the through hole 101.

Since the grommet inner 3, the grommet 1, and the wire harness WH can reliably assemble the grommet inner 3 into the through hole 101 as described above, the first lip portion 23a, the second lip portion 23b, and the through hole 101 can be formed. It is possible to properly maintain the contact state with the water-stopped surface 102 at the peripheral edge, and thereby it is possible to reliably ensure appropriate waterproofness.

Furthermore, according to the grommet inner 3, the grommet 1, and the wire harness WH described above, the four locking claw portions 32 and the four deformation adjusting rib portions 33 are located at positions symmetrical with respect to the reference point P1. It is formed. Accordingly, the grommet inner 3, the grommet 1, and the wire harness WH are locked because the grommet inner 3 is locked to the edge of the through hole 101 by the four locking claws 32 arranged at symmetrical positions. The force can be applied in a well-balanced manner, and the deformation of the fitting portion 35 of the grommet inner 3 is adjusted by the deformation adjusting rib portion 33, so that the grommet inner 3 can be reliably assembled in the through hole 101. it can.

Further, according to the grommet inner 3, the grommet 1, and the wire harness WH described above, the deformation adjusting rib portion 33 is a crushing rib portion that can be crushed by the edge portion of the through hole 101. Therefore, in the grommet inner 3, the grommet 1, and the wire harness WH, each deformation adjusting rib portion 33 is crushed by the edge portion of the through hole 101 in accordance with the operation of fitting the fitting portion 35 into the through hole 101, and penetrates. The gap between the hole 101 and the inner surface 101a can be almost eliminated. As a result, the grommet inner 3, the grommet 1, and the wire harness WH can suitably exhibit the function of adjusting the deformation by the respective deformation adjusting rib portions 33 and the function of reducing the backlash, and in this respect also, the grommet inner 3 is penetrated. The holes 101 can be surely assembled.

Further, according to the grommet inner 3, the grommet 1, and the wire harness WH described above, the fitting portion 35 is provided at the curved surface portion on one side of the two long axis reference positions P2, and the open end portions are mutually openable. An end portion locking portion 35c capable of locking 31b and 31c with each other and a fulcrum portion 35d provided on the curved surface portion on the other side of the two long axis reference positions P2 and serving as an open fulcrum of the open end portions 31b and 31c are provided. Have. Therefore, the grommet inner 3, the grommet 1, and the wire harness WH are configured such that the grommet inner 3 includes the end engaging portion 35c and the fulcrum portion 35d as the easily deformable portions that are relatively easily deformed compared to other portions. In this case, since the locking claw portion 32 and the deformation adjusting rib portion 33 are arranged in the above-mentioned positional relationship, the deformation adjusting action of the fitting portion 35 by the deformation adjusting rib portion 33 can be more remarkably exhibited. Therefore, the effect of maintaining the locked state of each locking claw 32 and the edge of the through hole 101 in an appropriate state can be more significantly exhibited.

In addition, the grommet inner, the grommet, and the wire harness according to the above-described embodiment of the present invention are not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. The grommet inner, the grommet, and the wire harness according to the present embodiment may be configured by appropriately combining the constituent elements of the above-described embodiments and modifications.

In the above description, the fitting part 35 has the end locking part 35c provided at one end in the major axis direction Y and the fulcrum part 35d provided at the other end in the major axis direction Y. However, the present invention is not limited to this. In the fitting portion 35, the end locking portion 35c and the fulcrum portion 35d may be arranged at positions different from those described above, and the open end portions 31b and 31c, the end locking portion 35c, and the fulcrum portion 35d themselves may be provided. The configuration may not be provided.

In the above description, the locking claw portion 32 has been described as being formed to include the arm portion 32a and the claw portion 32b, but the invention is not limited to this, and the locking claw portion can be locked to the edge portion of the through hole 101. However, it may be configured such that a part thereof does not include the arm portion 32a.

At least one locking claw portion 32 described above may be provided on each curved surface portion in the four sections between the two long axis reference positions P2 and the two short axis reference positions P3. There may be a section in which two locking claws 32 are provided, that is, a total of five or more may be provided. Further, although the four locking claw portions 32 are described as being formed at positions symmetrical with respect to the reference point P1, the present invention is not limited to this, and two long axis reference positions P2 and two short axis reference positions P3 are provided. As long as at least one curved surface portion is provided in each of the four sections between them, the positions may be asymmetrical.

Similarly, at least one deformation adjusting rib portion 33 described above may be provided in each of the four sections between the two long-axis reference positions P2 and the four locking claw portions 32. There may be a section in which two adjustment rib portions 33 are provided, that is, a total of five or more adjustment rib portions 33 may be provided. Further, even if the four deformation adjusting rib portions 33 are provided at least one in each of the four sections between the two long-axis reference positions P2 and the four locking claw portions 32, they may be asymmetrical positions. Good.

In the above description, the virtual contour line L1 has been described as being formed as an elliptical shape, but the present invention is not limited to this. For example, as shown in the modification example of FIG. In addition, if the length along the major axis L2 is longer than the length along the minor axis L3, and at least both ends in the major axis direction along the major axis L2 are curved virtual lines, what is called an ellipse It may have a shape. Here, the elliptical shape can be typically defined as a shape made up of a set of points such that the sum of distances from two fixed points having the long axis L2 is constant. In this case, the short-axis intersection point P31 corresponds to both apexes of the virtual contour line L1 in the short-axis direction Z.

1 Grommet 2 Grommet Outer 3 Grommet Inner 31b, 31c Open End 32 Locking Claw 33 Deformation Adjusting Rib 34 Mounting Part 35 Fitting 35b Outer Side 35c End Lock 35d Support 101 101 Through Hole 101a Inner 102 Cover Water stop surface L1 Virtual contour line L2 Long axis L3 Short axis P1 Reference point P2 Long axis reference position P21 Long axis intersection P3 Short axis reference position P31 Short axis intersection W Electric wire WH Wire harness Y Long axis direction

Claims (5)

A mounting portion to which a grommet outer that is in contact with the surface to be stopped and is capable of stopping water between the surface to be stopped,
A fitting portion that is formed in an annular shape that is capable of inserting an electric wire integrally with the mounting portion and that can be fitted into a through hole formed in the water-stopped surface,
A locking claw portion which is formed so as to project from the outer surface of the fitting portion and can be locked to the edge portion of the through hole,
A deformation adjusting rib portion formed so as to project from the outer surface of the fitting portion and capable of contacting with the inner surface of the through hole;
The inner surface of the through hole and the outer surface of the fitting portion are symmetrical with respect to a reference point that is an intersection of a long axis and a short axis orthogonal to the long axis, and along the long axis. The length is longer than the length along the minor axis, and at least both ends in the major axis direction along the major axis are formed in a shape along an annular virtual contour line that is a curve,
The locking claw portion has two major axis reference positions on the outer surface of the fitting portion, which are positions corresponding to two major axis intersections that are intersections of the major axis and the virtual contour line, and the minor axis. At least one in each curved surface portion in four sections between the two short axis reference positions of the outer surface of the fitting portion, which are the positions corresponding to the two short axis intersections that are the intersections of the There are 4 in total,
At least one deformation adjusting rib portion is provided in each of four sections between the two long axis reference positions and the four locking claw portions, and a total of four deformation adjusting rib portions are provided .
Further, the deformation adjusting rib portion is a crushing rib portion that can be crushed by the edge portion of the through hole, and in a state where the fitting portion is not fitted in the through hole, an outer surface of the fitting portion is formed. The amount of protrusion from is formed so as to be equal to or greater than the distance between the outer surface and the inner surface of the through hole at the position where the deformation adjusting rib portion is provided .
Grommet inner. The four locking claw portions and the four deformation adjusting rib portions are formed at positions symmetrical with respect to the reference point.
The grommet inner according to claim 1. The fitting portion is provided at a curved surface portion on one side of the two long axis reference positions, and an end locking portion capable of locking mutually open open ends, and the two long axis reference positions. provided on the other side curved surface portion of the position possess a fulcrum in the open fulcrum of the open end,
The fulcrum portion is formed in a hinge shape by connecting one open end side and the other open end side relative to each other with respect to the fulcrum portion so as to be openable and closable, and when the open end portion is opened. Is a base point of bending between the one open end side and the other open end side,
The fitting portion is capable of mutually locking the open end portion by the end locking portion, while unlocking the open end portion of the end locking portion to lock the fulcrum portion. It is configured so that the open ends can be opened to each other while bending the whole as a base point,
The two deformation adjusting rib portions on one side in the long axis direction are formed at positions sandwiching the end locking portion with respect to the circumferential direction of the outer surface of the fitting portion,
The two deformation adjusting rib portions on the other side in the major axis direction are formed at positions sandwiching the fulcrum portion with respect to the circumferential direction of the outer surface of the fitting portion.
The grommet inner according to claim 1 or 2 . A grommet outer that is in contact with the water-stopped surface and can stop water between the water-stopped surface,
A mounting part to which the grommet outer is mounted, a fitting part formed integrally with the mounting part in an annular shape through which an electric wire can be inserted, and can be fitted into a through hole formed in the water-stopped surface, the fitting part A locking claw portion that is formed to project from the outer surface of the through hole and that can be locked to the edge portion of the through hole, and is capable of contacting the inner surface of the through hole that is formed to project from the outer surface of the fitting portion. And a grommet inner having a deformation adjusting rib portion,
The inner surface of the through hole and the outer surface of the fitting portion are symmetrical with respect to a reference point that is an intersection of a long axis and a short axis orthogonal to the long axis, and along the long axis. The length is longer than the length along the minor axis, and at least both ends in the major axis direction along the major axis are formed in a shape along an annular virtual contour line that is a curve,
The locking claw portion has two major axis reference positions on the outer surface of the fitting portion, which are positions corresponding to two major axis intersections that are intersections of the major axis and the virtual contour line, and the minor axis. At least one in each curved surface portion in four sections between the two short axis reference positions of the outer surface of the fitting portion, which are the positions corresponding to the two short axis intersections that are the intersections of the There are 4 in total,
At least one deformation adjusting rib portion is provided in each of four sections between the two long axis reference positions and the four locking claw portions, and a total of four deformation adjusting rib portions are provided .
Furthermore, the deformation adjusting rib portion is a crushing rib portion that can be crushed by an edge portion of the through hole, and in a state where the grommet inner is not fitted in the through hole, from the outer surface of the fitting portion. Is formed so as to be equal to or greater than the distance between the outer surface and the inner surface of the through hole at the position where the deformation adjusting rib portion is provided .
Grommet. Electric wire,
A grommet outer that is in contact with the water-stopped surface and is capable of stopping water between the water-stopped surface, and a grommet having a grommet inner to which the grommet outer is mounted,
The grommet inner is formed into a mounting portion to which the grommet outer is mounted, an annular shape that is integral with the mounting portion and through which the electric wire can be inserted, and is fittable into a through hole formed in the water stop surface. Portion, a locking claw portion that projects from the outer surface of the fitting portion and can be locked to the edge portion of the through hole, and an inner surface of the through hole that projects from the outer surface of the fitting portion. And a deformation adjusting rib portion that can come into contact with,
The inner surface of the through hole and the outer surface of the fitting portion are symmetrical with respect to a reference point that is an intersection of a long axis and a short axis orthogonal to the long axis, and along the long axis. The length is longer than the length along the minor axis, and at least both ends in the major axis direction along the major axis are formed in a shape along an annular virtual contour line that is a curve,
The locking claw portion has two major axis reference positions on the outer surface of the fitting portion, which are positions corresponding to two major axis intersections that are intersections of the major axis and the virtual contour line, and the minor axis. At least one in each curved surface portion in four sections between the two short axis reference positions of the outer surface of the fitting portion, which are the positions corresponding to the two short axis intersections that are the intersections of the There are 4 in total,
At least one deformation adjusting rib portion is provided in each of four sections between the two long axis reference positions and the four locking claw portions, and a total of four deformation adjusting rib portions are provided .
Further, the deformation adjusting rib portion is a crushing rib portion that can be crushed by the edge portion of the through hole, and in a state where the grommet inner is not fitted in the through hole, from the outer surface of the fitting portion. Is formed so as to be equal to or greater than the distance between the outer surface and the inner surface of the through hole at the position where the deformation adjusting rib portion is provided .
Wire harness.

Images