Grommet

Abstract

To provide a grommet which is advantageous for improving workability or holding force when the grommet is attached to a peripheral edge of a through hole in an attached member.SOLUTION: A grommet 10 includes: a grommet body 11; and an inner protector 20 which supports the grommet body 11 and is held at a peripheral edge of a through hole 2. The inner protector 20 includes: an annular body part 22; and an inner lock 30 which is provided in the body part 22 and locks the body part 22 to the peripheral edge of the through hole 2 when a part of the body part 22 is inserted into the through hole 2. The inner lock 30 includes: a lock claw 31 which has a projection 31a which is brought into contact or is engaged with the peripheral edge of the through hole 2 and elastically deforms by displacement of the projection 31a; an upper wall 22b as a support part for supporting the lock claw 31 with a side facing an inner face 31d of the lock claw 31 as a space part 32; and a rib 33 which is provided in the support part, extends along a position in which the support part and the lock claw 31 are continued to each other, and projects to the space part 32.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a grommet. [Background technology]

[0002] Conventionally, there is a grommet that is attached to the periphery of a through hole pre-formed in a plate body to protect the electric wire from the periphery of the through hole when the electric wire is passed through the through hole. Patent Document 1 discloses technology related to a grommet that includes a grommet body that holds the electric wire when the electric wire is passed through a through hole in a vehicle body panel as an attachment member, and an inner protector that supports the grommet body and is held on the periphery of the through hole. The outer peripheral wall of the inner protector is provided with a plurality of locking claws that are equally spaced circumferentially. When the inner protector supporting the grommet body engages with the periphery of the through hole, the locking claws elastically deform while contacting the periphery of the through hole and are ultimately locked onto the periphery of the through hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-186623 Summary of the Invention [Problem to be solved by the invention]

[0004] In the grommet disclosed in Patent Document 1, the locking claws bend easily when the inner protector engages with the periphery of the through hole, so basically, the workability is good for the worker. However, depending on the structure of the inner protector, the amount of deformation of the locking claws may increase, which may result in a decrease in the workability when inserting part of the inner protector into the through hole or a decrease in the holding force of the locking claws, so improvements are desired in advance.

[0005] The present invention has been made in view of the problems inherent in the prior art, and an object of the present invention is to provide a grommet that is advantageous in improving workability and holding power when attached to the periphery of a through hole in an attachment member. [Means for solving the problem]

[0006] A grommet according to one aspect of the present invention comprises a grommet body that holds, on the inner periphery, an electric wire that passes through a through hole in a mounting member, and an inner protector that supports the grommet body and is held on the periphery of the through hole. The inner protector has a ring-shaped main body portion through which the electric wire passes, and an inner lock that is provided on the main body portion and that engages the main body portion with the periphery of the through hole when a part of the main body portion is inserted into the through hole. The inner lock has a protrusion that contacts or engages with the periphery of the through hole and includes a locking claw that elastically deforms when the protrusion is displaced, a support portion that supports the locking claw with the side facing the inner surface of the locking claw as a space, and a rib that is provided on the support portion and extends along the position where the support portion and the locking claw are continuous, protruding into the space. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a grommet that is advantageous in improving workability or holding force when being attached to the periphery of a through hole in a workpiece. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a grommet according to one embodiment. [Figure 2] FIG. 2 is an exploded view of a grommet according to one embodiment. [Figure 3] FIG. 2 is a cross-sectional view of an inner lock according to an embodiment. [Figure 4] FIG. 10 is a bottom view of the inner lock according to one embodiment. [Figure 5] 10A and 10B are cross-sectional views illustrating a deformed state of a locking claw in one embodiment. [Figure 6]10 is a cross-sectional view illustrating a deformed state of a locking claw in a comparative example. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a grommet according to one embodiment will be described in detail with reference to the drawings. Note that the dimensional proportions in the drawings are exaggerated for the sake of convenience and may differ from the actual proportions.

[0010] FIG. 1 is a perspective view of a grommet 10 according to one embodiment. As an example, the grommet 10 is attached to the periphery of a through-hole 2 formed in advance in a vehicle body panel 1 serving as an attachment member, and protects an electric wire W that has passed through the through-hole 2 from the periphery of the through-hole 2. The opening shape of the through-hole 2 is circular. The electric wire W may be a wire harness that is an assembly of electric wires. In the following description, "upper" refers to the side facing the through-hole 2 when the grommet 10 is attached to the periphery of the through-hole 2, and "lower" refers to the opposite side.

[0011] 2 is an exploded view of the grommet 10. The grommet 10 includes a grommet body 11 and an inner protector 20.

[0012] The grommet body 11 is a cylindrical member that holds the electric wires W routed on its inner periphery. The grommet body 11 is made of a flexible material such as rubber. The grommet body 11 includes a large-diameter cylindrical portion 12 and a small-diameter cylindrical portion 13.

[0013] The large diameter cylindrical portion 12 is connected to the inner protector 20. The outer diameter of the large diameter cylindrical portion 12 is larger than the opening diameter of the through hole 2. The large diameter cylindrical portion 12 includes a fitting groove 14 and a lip portion 15.

[0014] The fitting groove 14 is formed in an annular shape on the inner circumferential side of the large-diameter cylindrical portion 12, and fits into the flange portion 23 of the inner protector 20 when the inner protector 20 is connected to the large-diameter cylindrical portion 12. A protrusion 16 that engages with a recess 23a formed in part of the flange portion 23 may be provided in part of the fitting groove 14.

[0015] The lip portion 15 is an annular sealing portion that protrudes from the outer peripheral edge surface 12a facing the vehicle body panel 1 toward the vehicle body panel 1. The lip portion 15 may be composed of an inner peripheral lip portion 15a and an outer peripheral lip portion 15b. When the grommet 10 is attached to the periphery of the through hole 2, the inner peripheral lip portion 15a and the outer peripheral lip portion 15b elastically deform in a direction that leans toward the outer peripheral edge surface 12a and comes into close contact with the periphery of the through hole 2 on one surface of the vehicle body panel 1. This prevents water and other contaminants from entering the grommet 10 from the outside to the inside through the gap between the lip portion 15 and the surface of the vehicle body panel 1 that faces the lip portion 15.

[0016] The small-diameter cylindrical portion 13 is continuous with the side of the large-diameter cylindrical portion 12 opposite to the side facing the vehicle body panel 1, and holds the electric wire W on its inner peripheral side. In other words, the small-diameter cylindrical portion 13 has an inner surface that contacts the outer peripheral surface of the electric wire W over a predetermined length. The inner diameter of the small-diameter cylindrical portion 13 is smaller than the inner diameter of the large-diameter cylindrical portion 12, and is slightly smaller than or substantially the same as the outer diameter of the electric wire W. This prevents water and other contaminants from entering the inside of the grommet 10 from the outside through the gap between the inner surface of the small-diameter cylindrical portion 13 and the outer peripheral surface of the electric wire W. The small-diameter cylindrical portion 13 is made of a flexible material, and therefore deforms in accordance with changes in the position of the electric wire W.

[0017] The inner protector 20 is an annular member that supports the grommet body 11 and is held on the periphery of the through hole 2. When the inner protector 20 supports the grommet body 11, the electric wires W held in the grommet body 11 pass through the inner periphery. The inner protector 20 is formed of a material, such as resin, that is more rigid than the grommet body 11. The inner protector 20 is also composed of a pair of members that are divided into two by an imaginary plane that includes the central axis of the inner protector 20 itself, namely, a first inner member 21a and a second inner member 21b.

[0018] The inner protector 20 generally includes a main body 22 that is an annular structure made up of a plurality of wall portions, and a flange 23 that is an annular plate.

[0019] The main body 22 includes, for example, an outer peripheral wall 22a, an upper wall 22b, and an inner peripheral wall 22c. The outer peripheral wall 22a is a wall that faces the peripheral edge of the through hole 2 along the planar direction of the vehicle body panel 1 when the grommet 10 is attached to the peripheral edge of the through hole 2. The upper wall 22b is a wall that is continuous with the upper peripheral edge of the outer peripheral wall 22a and extends toward the inner peripheral side. The inner peripheral wall 22c is a wall that is continuous with the inner peripheral edge of the upper wall 22b and is approximately parallel to the outer peripheral wall 22a.

[0020] The flange portion 23 protrudes radially outward from the lower peripheral edge of the outer peripheral wall 22a. As described above, the flange portion 23 is fitted into the fitting groove 14 when the inner protector 20 is connected to the grommet body 11. The flange portion 23 also has recesses 23a that align with the positions of the protrusions 16 pre-formed in the fitting groove 14 and engage with the protrusions 16 when the flange portion 23 is fitted into the fitting groove 14. The engagement between the recesses 23a and the protrusions 16 prevents the inner protector 20 from rotating relative to the grommet body 11 around the central axis of the large-diameter cylindrical portion 12. Note that the recesses 23a may be formed in the flange portions 23 of the first inner member 21a and the second inner member 21b, respectively. Alternatively, the fitting groove 14 of the grommet body 11 may have multiple protrusions 16 formed therein, each corresponding to one of the recesses 23a.

[0021] Here, when the inner protector 20 is a combination of a pair of members, a first inner member 21a and a second inner member 21b, the first inner member 21a and the second inner member 21b may have the same semi-annular shape. Furthermore, the first inner member 21a and the second inner member 21b include two side walls 22d that abut against each other in the circumferential direction when combined with each other. One of the two side walls 22d is provided with a claw portion 24, and the other side wall 22d is formed with a groove portion 25 into which the claw portion 24 fits. When the first inner member 21a and the second inner member 21b are combined with each other, the claw portion 24 of the first inner member 21a fits into the groove portion 25 of the second inner member 21b, and the claw portion 24 of the second inner member 21b fits into the groove portion 25 of the first inner member 21a.

[0022] The first inner member 21a and the second inner member 21b may be connected, for example, via a hinge portion instead of the connection mechanism using the claw portion 24 and the groove portion 25. Also, although the case where the inner protector 20 is divided into two inner members has been exemplified here, it may be divided into three or more inner members.

[0023] The inner protector 20 also has a plurality of inner locks 30 that lock the main body 22 to the periphery of the through hole 2 when part of the main body 22 is inserted into the through hole 2. In this embodiment, the inner locks 30 are provided at four locations equally spaced circumferentially across the entire inner protector 20. That is, the first inner member 21a and the second inner member 21b each have two inner locks 30. The number of inner locks 30 provided is not particularly limited and may be other than four. Since each inner lock 30 has the same shape, the following describes one inner lock 30 in detail.

[0024] Fig. 3 is a cross-sectional view of the inner lock 30 corresponding to the cross section III-III of the inner protector 20 in Fig. 2. Fig. 3 illustrates the state of the inner lock 30 when the main body 22 is engaged with the periphery of the through-hole 2 formed in the vehicle body panel 1. Fig. 4 is a bottom view of the inner lock 30 viewed from below, corresponding to the cross-sectional view of Fig. 3.

[0025] 3, a portion of the vehicle body panel 1 and the through hole 2 are indicated by imaginary lines. In this embodiment, the periphery of the through hole 2 is, for example, a portion of the rising portion 1a facing in the opposite direction to the insertion direction of the inner protector 20 into the through hole 2. Note that the periphery of the through hole 2 may be a portion of the rising portion facing in the insertion direction of the inner protector 20, or may be a simple open end without any rising portion.

[0026] The inner lock 30 includes a lock claw 31 , a support portion, and a rib 33 .

[0027] The locking claw 31 is provided along the outer peripheral wall 22a of the main body 22 and elastically deforms in a direction connecting the inside and outside of the outer peripheral wall 22a. The locking claw 31 has a protrusion 31a that contacts or engages with the periphery of the through hole 2. Here, the state in which the protrusion 31a engages with the periphery of the through hole 2 refers to the state of the protrusion 31a relative to the through hole 2 when the inner lock 30 locks the main body 22 to the periphery of the through hole 2, i.e., when the grommet 10 is attached to the periphery of the through hole 2. The protrusion 31a protrudes outward from a ridge line along the circumferential direction of the outer peripheral wall 22a as a vertex 31b, and is always located outside the outer periphery of the outer peripheral wall 22a. In other words, the elastic deformation of the locking claw 31 occurs due to the displacement of the protrusion 31a resulting from the protrusion 31a being in contact with the periphery of the through hole 2. When the protrusion 31a is engaged with the periphery of the through hole 2, the periphery of the through hole 2 fits into the lower end groove 31c of the protrusion 31a (see Figure 5), thereby maintaining the main body 22 in a constant posture relative to the periphery of the through hole 2.

[0028] In addition, since the inner protector 20 has inner locks 30 provided at four locations around the circumference, each of the protrusions 31a included in the four lock claws 31 protrudes along a radial direction based on the central axis of the main body 22.

[0029] The support portion supports the locking claw 31 with the side facing the inner surface 31d of the locking claw 31 as a space 32. According to the configuration of the main body 22 in this embodiment, the support portion is the upper wall 22b. In this case, the position where the support portion and the locking claw 31 are continuous is approximately on the outer peripheral edge of the upper wall 22b. Furthermore, the space 32 is at least a part of the spatial region formed in the main body 22, and in this embodiment, it is partially penetrated between the outer peripheral wall 22a side and the inner peripheral wall 22c side.

[0030] The rib 33 is a structural element provided on the upper wall 22b as a support portion. As shown in FIG. 3, the rib 33 protrudes from the upper wall 22b toward the space 32 facing the inner surface 31d of the locking claw 31. The height of the rib 33 from the upper wall 22b to its tip is determined within a range in which the rib 33 does not interfere with the inner surface 31d when the locking claw 31 elastically deforms toward the space 32. As shown in FIG. 4, the rib 33 extends along the position where the support portion and the locking claw 31 are continuous. It is desirable that both ends of the rib 33 in the extension direction are integrated with the outer peripheral wall 22a or the upper wall 22b, respectively.

[0031] The rib 33 also has a notched surface 33a located outside the range of elastic deformation of the locking claw 31. For example, the notched surface 33a is a surface formed by cutting out a portion that the inner surface 31d of the locking claw 31 first approaches when the locking claw 31 elastically deforms toward the space 32. In this embodiment, the notched surface 33a is a surface formed by cutting out the rib 33 so as to remove the side where the tip surface of the rib 33 and the surface of the locking claw 31 facing the inner surface 31d meet.

[0032] Next, the function of the grommet 10 will be described.

[0033] First, to assemble the grommet 10, a worker prepares the grommet body 11 with the electric wire W routed inside, and passes the electric wire W exposed from the large-diameter cylindrical portion 12 of the grommet body 11 through the inner periphery of the inner protector 20. Here, the inner protector 20 is divided into a first inner member 21a and a second inner member 21b in advance. Therefore, if the electric wire W has already passed through the through-hole 2 in the vehicle body panel 1 at this stage, the worker can easily pass the electric wire W through the inner protector 20 by combining the inner members so as to sandwich the electric wire W from both sides. Next, the worker elastically deforms the large-diameter cylindrical portion 12 of the grommet body 11 in a direction to widen it, and fits the flange 23 into the fitting groove 14 of the grommet body 11 while engaging the protrusion 16 with the recess 23a of the flange 23 of the inner protector 20. Through this series of operations, the grommet 10 is attached to the electric wire W.

[0034] Next, to attach the grommet 10 to the periphery of the through hole 2, if the electric wire W has not yet been inserted through the through hole 2, the worker inserts the electric wire W exposed from the inner protector 20 into the through hole 2. Next, the worker presses the entire grommet 10 toward the through hole 2 while inserting the main body 22 of the inner protector 20 into the through hole 2. At this time, each locking claw 31 of the inner lock 30 is elastically deformed as the protrusion 31 a contacts the periphery of the through hole 2 and displaces, allowing the main body 22 to be inserted into the through hole 2. When the main body 22 is inserted to the insertion completion position, each locking claw 31 elastically returns to its original position, thereby locking the main body 22 to the periphery of the through hole 2. When the inner protector 20 is in this locked state, the lip 15 of the grommet body 11 closely contacts the periphery of the through hole 2 on the surface of the vehicle body panel 1. That is, the vehicle body panel 1 is sandwiched between the protrusion 31a on the inner protector 20 side and the lip portion 15 on the grommet body 11 side. As a result, the grommet 10 is attached to the periphery of the through hole 2 so as to close the through hole 2.

[0035] Furthermore, with regard to the attachment of the grommet 10, in particular the elastic deformation of the locking claw 31 when the main body 22 of the inner protector 20 is inserted into the through-hole 2 will be described in detail.

[0036] Fig. 5 is a cross-sectional view for explaining the deformation state of the lock claw 31. Fig. 5 depicts the state of the lock claw 31 while the main body 22 is inserted into the through-hole 2, based on the main part in the cross-sectional view of the inner lock 30 shown in Fig. 3.

[0037] As the main body 22 begins to be inserted into the through-hole 2, the protrusion 31a of the locking claw 31 comes into contact with the periphery of the through-hole 2. As shown in FIG. 5 , as the insertion of the main body 22 progresses in the insertion direction indicated by the outline arrow, the protrusion 31a is pressed against the periphery of the through-hole 2, and the locking claw 31 elastically deforms so as to gradually fit into the space 32. Here, the inner lock 30 has a rib 33 on the upper wall 22b, which serves as a support. Therefore, the elastic deformation of the locking claw 31 occurs with the apex 31b of the protrusion 31a acting as a force point and the region of the base of the rib 33 closer to the locking claw 31 acting as a base point BP (fulcrum). As described above, the rib 33 extends along the position where the upper wall 22b and the locking claw 31 are continuous, and therefore the base point BP is located close to the locking claw 31.

[0038] 6 is a cross-sectional view illustrating, as a comparative example, the deformation state of the locking claw 131 in the inner lock 130 that does not have the rib 33. In FIG. 6, the inner lock 130 and the vehicle body panel 1 having the through hole 2 are drawn in accordance with FIG. 5.

[0039] The inner lock 130 includes a locking claw 131 that has the same shape as the locking claw 31 described above. The locking claw 131 has a protrusion 131a on which a vertex 131b is formed. Meanwhile, the other components included in the inner lock 130 are the same as the components included in the inner lock 30 described above. In other words, the only difference between the inner lock 130 and the inner lock 30 is that the rib 33 is not present in the inner lock 130.

[0040] In the inner lock 130, as with the inner lock 30, as the insertion of the main body 22 progresses, the protrusion 131a is pressed against the periphery of the through-hole 2, causing the lock claw 131 to elastically deform so as to gradually fit into the space 32. As with the inner lock 30, the apex 131b of the protrusion 131a serves as the point of force for elastic deformation of the lock claw 131, just as with the inner lock 30. However, since the inner lock 130 does not have a rib 33, depending on the structure of the main body 22, a portion of the upper wall 22b, which serves as a support, may also elastically deform in accordance with the elastic deformation of the lock claw 131. If a portion of the upper wall 22b also elastically deforms in this way, the base point BP of the lock claw 131 during elastic deformation is a region of the upper wall 22b that is separated from the position continuous with the lock claw 131. In other words, the distance between the base point BP and the apex 131b in the inner lock 130 is longer than the distance between the base point BP and the apex 31b in the inner lock 30.

[0041] 6, when the base point BP of the inner lock 130 is located relatively far from the apex 131b, the stroke amount L2 required to reach the locked state when the lock claw 131 is elastically deformed tends to be large. The larger the stroke amount L2, the greater the amount of elastic deformation (overlap amount) of the lock claw 131, and as a result, the greater the force required by the operator to insert the main body 22 into the through-hole 2.

[0042] 5, when the base point BP of the inner lock 30 is located relatively close to the apex 31b, the stroke amount L1 required for the locking claw 31 to enter the locked state when elastically deformed is smaller than the stroke amount L2 required when the rib 33 is not present. Therefore, the amount of elastic deformation of the locking claw 31 is smaller than when the rib 33 is not present, and as a result, the force required by the operator to insert the main body 22 into the through-hole 2 is reduced.

[0043] Meanwhile, even in a state in which the grommet 10 is attached to the periphery of the through hole 2, the inner lock 30 has the ribs 33 provided on the upper wall 22b, which improves the rigidity of the upper wall 22b serving as a support for the locking claw 31 or the main body 22 including the upper wall 22b. Therefore, the holding force of the locking claw 31 to hold the inner protector 20 against the periphery of the through hole 2 is improved.

[0044] Next, the effects of the grommet 10 will be described.

[0045] The grommet 10 according to this embodiment includes a grommet body 11 that holds, on the inner periphery, an electric wire W that passes through a through hole 2 in a vehicle body panel 1 serving as an attachment member, and an inner protector 20 that supports the grommet body 11 and is held on the periphery of the through hole 2. The inner protector 20 has an annular main body portion 22 through which the electric wire W passes, and an inner lock 30 that is provided on the main body portion 22 and that locks the main body portion 22 to the periphery of the through hole 2 when a portion of the main body portion 22 is inserted into the through hole 2. The inner lock 30 has a lock claw 31 that has a protrusion 31a that contacts or engages with the periphery of the through hole 2 and that elastically deforms when the protrusion 31a is displaced, and an upper wall 22b that serves as a support portion that supports the lock claw 31, with the side facing an inner surface 31d of the lock claw 31 being a space 32. Furthermore, the inner lock 30 includes a rib 33 that is provided on the support portion, extends along the position where the support portion and the lock claw 31 are continuous, and protrudes into the space portion 32.

[0046] First, in the grommet 10, the inner lock 30 includes a rib 33 that extends along the position where the support portion, which is, for example, the upper wall 22b, and the locking claw 31 are continuous and protrudes into the space 32. Therefore, as described above, when a portion of the main body 22 is inserted into the through hole 2, the elastic deformation of the locking claw 31 occurs from a base point BP at a region of the base of the rib 33 that is closer to the locking claw 31. The position of this base point BP is closer to the locking claw 31 than the base point BP that would be expected if the rib 33 were not present. Therefore, the stroke amount until the locking claw 31 is engaged upon elastic deformation can be reduced, and the amount of elastic deformation of the locking claw 31 can be reduced compared to when the rib 33 is not present. Therefore, the force required by the operator to insert the main body 22 into the through hole 2 is reduced, thereby improving the workability of attaching the grommet 10 to the periphery of the through hole 2.

[0047] Furthermore, in grommet 10, ribs 33 are provided on the support portion, which can improve the rigidity of the support portion or main body portion 22 including the support portion. Therefore, the holding force of locking claw 31 to hold inner protector 20 against the periphery of through hole 2 can be improved.

[0048] As described above, according to this embodiment, a grommet 10 can be provided that is advantageous for improving workability or holding force when attached to the periphery of a through hole 2 in an attachment member such as a vehicle body panel 1.

[0049] Furthermore, in the grommet 10 according to this embodiment, the rib 33 may have a notched surface 33 a positioned outside the range of elastic deformation of the locking claw 31 .

[0050] With this grommet 10, even if the support portion is provided with a rib 33 that protrudes into the space 32, the locking claws 31 do not interfere with the rib 33 when they elastically deform toward the space 32. Therefore, when attaching the grommet 10 to the periphery of the through hole 2, it is possible to prevent a situation in which the amount of elastic deformation of the locking claws 31 is insufficient, resulting in an inability to lock the inner protector 20.

[0051] Furthermore, by providing the cutout surfaces 33a in the ribs 33, the ribs 33 can be set larger than when the ribs 33 are not provided with the cutout surfaces 33a and are sized to be positioned outside the range of elastic deformation of the locking claws 31. This further improves the rigidity of the support portion or the main body portion 22 including the support portion, and ultimately improves the holding force of the locking claws 31.

[0052] In addition, in the grommet 10 of this embodiment, the grommet body 11 may have an annular lip portion 15 that adheres to the peripheral surface of the through hole 2 when the inner lock 30 engages the main body portion 22 with the peripheral edge of the through hole 2.

[0053] Because grommet body 11 has lip portion 15, grommet 10 attached to the periphery of through hole 2 is highly watertight because water and other contaminants are prevented from entering from the outside to the inside of grommet 10 through the gap between lip portion 15 and the surface of the attached member. Furthermore, with this grommet 10, inner lock 30 includes rib 33, which, as described above, can further improve the holding force of locking claw 31, thereby further improving watertightness.

[0054] Although one embodiment has been described above, the embodiment is not limited to this, and various modifications are possible within the scope of the gist of the embodiment. [Explanation of symbols]

[0055] 1 Body Panel 2 through holes 10 Grommets 11 Grommet body 15 Lip 20 Inner protector 22 Main body 22b Upper wall 30 Inner Lock 31 Locking Claw 31a Protrusion 31d Inside 32 Space section 33 Ribs 33a Notched surface W electric wire

Claims

1. a grommet body that holds, on an inner periphery thereof, an electric wire that passes through a through hole in a mounting member; an inner protector that supports the grommet body and is held on the periphery of the through hole, The inner protector is an annular main body portion through which the electric wire passes; an inner lock provided on the main body portion, which locks the main body portion to the periphery of the through hole when a part of the main body portion is inserted into the through hole, The inner lock is a locking claw having a protrusion that contacts or engages with the periphery of the through hole and that is elastically deformed by displacement of the protrusion; a support portion that supports the locking claw with a space on the side facing the inner surface of the locking claw; a rib provided on the support portion, extending along a position where the support portion and the locking claw are continuous, and protruding into the space, The rib has a notched surface positioned outside the range of elastic deformation of the locking claw, and does not interfere with the rib when the locking claw is elastically deformed into the space. Grommet.

2. The grommet according to claim 1 , wherein the grommet body has an annular lip portion that comes into close contact with the peripheral surface of the through hole when the inner lock engages the body portion with the peripheral edge of the through hole.

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