JP2017118743A - Grommet and wiring module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a grommet from reducing a holding power for holding a panel.SOLUTION: A grommet 20 comprises: a cylinder part 22; a panel attachment part 50 that surrounds at least one external peripheral surface of the cylinder part 22 while having a gap 30; and a coupling part 70 that couples a part of a panel attachment part 50 and a part of the cylinder part 22. An engaging concave part 40 is provided to the outer peripheral surface of the panel attachment part 50. The gap 30 includes an opening 31 sandwiched by one end of an inner peripheral surface of the panel attachment part 50 and the cylinder part 22. The coupling part 70 is provided to the other end side of the panel attachment part 50. The engaging concave part 40 is provided between the coupling part 70 and the opening 31. The cylinder part 22 includes a projection part 23 in the outer peripheral surface, and the cylinder part 22 can be deformed so that the projection part 23 is deviated to the coupling part 70 side by pulling a wiring part 18. The projection part 23 is deviated to the coupling part 70 side while being contacted to the inner peripheral surface by the deformation of the cylinder part 22, and is provided so as to spread a diameter of one edge of the inner peripheral surface corresponding to the deviation.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a grommet for protecting a wire harness inserted through a through hole of a panel.

  As such a grommet, Patent Document 1 discloses a wire harness insertion portion (“tubular portion”) and an annular annular protruding portion formed of an elastic material so as to protrude radially outward from the wire harness insertion portion ( A grommet comprising a “panel mounting portion”) is disclosed. An annular locking recess for locking to the through hole of the panel is formed on the outer peripheral portion of the annular projecting portion. A receiving-side annular portion is formed on one side in the axial direction of the wire harness insertion portion with respect to the locking recess, and an insertion-side annular portion is formed on the other side.

  In this grommet, the adhesive tape is wound around the portion where the slit is formed in the wire harness insertion portion in a state where the wire harness is inserted inside the wire harness insertion portion, so that the wire harness insertion portion The wire harness is fixed. When the operator inserts the grommet to which the wire harness is fixed into the through hole of the panel, the locking recess is locked to the inner peripheral edge of the through hole, and the grommet is attached to the through hole. Thereby, the wire harness inserted through the through hole is protected. By providing the grommet between the wire harness and the through hole of the panel, it is possible to prevent water or dust from moving through the gap between the wire harness and the through hole.

JP2013-258801A

  7 and 8 show a grommet 200 according to the comparative technique. Similarly to the grommet of Patent Document 1, the grommet 200 also includes a cylindrical portion 220 through which the wire harness 18 is inserted, and an annular panel mounting portion 500 formed so as to protrude radially outward from the cylindrical portion 220. An annular locking recess 400 that locks to the inner peripheral edge of the through hole 12 formed in the panel 10 is formed on the outer peripheral portion of the panel mounting portion 500. Two projecting pieces for fixing the inserted wire harness 18 project in the axial direction on one end side in the axial direction of the cylindrical portion 220. In a state where two protrusions are in contact with the outer periphery of the wire harness 18, the wire harness 18 is attached to the grommet 200 by winding the adhesive tape T from above the wire harness 18 and the protrusion in the vicinity of the tip of the protrusion. Fixed.

  In both the grommet of Patent Document 1 and the grommet 200 according to the comparative technique, the entire panel mounting portion in the axial direction is integrated with the outer peripheral surface of the cylindrical portion through which the wire harness is inserted. For this reason, when the wire harness is pulled in the direction of arrow Y100 (see FIG. 8) in a state where these grommets holding the wire harness are attached to the through-holes of the panel, the panel attachment part is It is pulled in the direction of arrow Y200 (see FIG. 8). Accordingly, the diameter of the panel mounting portion is reduced and the annular locking recess is also reduced in diameter, and the force by which the locking recess presses the inner peripheral surface of the through hole of the panel is reduced. As described above, both of Patent Document 1 and the grommet according to the comparative technique have a problem that the holding force for holding the panel by the grommet is reduced when the wire harness is pulled.

  The present invention has been made to solve these problems, and provides a technique capable of suppressing a decrease in holding force of the grommet holding the panel even when the wire harness (“wiring portion”) is pulled. With the goal.

  In order to solve the above-described problem, the grommet according to the first aspect is a grommet mounted on a panel in a state of being covered with a wiring portion including at least one electric wire, and the wiring portion is inserted through the grommet. A through hole formed in the panel by surrounding the at least a part of the outer peripheral surface with a gap between the cylindrical part that can be held and at least a part of the outer peripheral surface of the cylindrical part in the axial direction. A cylindrical panel mounting portion that can be mounted in a hole; a part of the panel mounting portion in the axial direction; and a connecting portion that connects a part of the cylindrical portion in the axial direction. An annular locking recess that can be locked to the inner peripheral edge of the through-hole is provided on the outer peripheral surface of the portion, and the gap is formed between one end of the inner peripheral surface of the panel mounting portion in the axial direction and the cylindrical portion. An opening sandwiched between the outer peripheral surface of the The portion is provided on the other end side of the panel mounting portion in the axial direction with respect to the opening, and the locking recess is provided between the connecting portion and the opening in the axial direction, The cylindrical portion includes a protruding portion that protrudes from the outer peripheral surface thereof and faces the opening of the gap, and is held by the cylindrical portion in a state where the locking recess is locked to the inner peripheral surface of the through hole. The tubular portion can be deformed so that the protruding portion is displaced toward the connecting portion by pulling the wiring portion in a direction from the opening side toward the connecting portion, and the protruding portion is While being in contact with the inner peripheral surface of the panel mounting portion by the deformation of the tube portion, the gap is displaced toward the connecting portion side in the gap, and as the displacement toward the connecting portion side, the one end of the inner peripheral surface of the panel mounting portion. Provided to expand the diameter It has been.

  The grommet which concerns on a 2nd aspect is a grommet which concerns on a 1st aspect, Comprising: The said protrusion part is provided with the contact surface for contact | abutting to the said one end of the internal peripheral surface of the said panel attachment part, The abutting surface is inclined with respect to the central axis so that a distance from the central axis of the cylindrical portion becomes shorter toward the connecting portion side.

  The grommet which concerns on a 3rd aspect is a grommet which concerns on a 1st aspect, Comprising: The internal peripheral surface of the said panel attachment part becomes so that the distance with the central axis of the said cylinder part becomes short toward the said connection part side. The connecting portion side portion of the protruding portion is formed with a width smaller than the opening in the radial direction of the cylindrical portion, and the protruding portion is As the cylinder portion is displaced toward the connecting portion by the deformation, the contact portion with the inner peripheral surface of the panel mounting portion is provided to move toward the connecting portion along the inner peripheral surface. .

  The grommet according to the fourth aspect is the grommet according to any one of the first to third aspects, wherein the wiring part is not pulled in a direction from the opening side toward the connecting part side. The projecting portion is provided on the outer peripheral surface of the cylindrical portion so as to be located outside the gap.

  A wiring module according to a fifth aspect includes the grommet according to any one of the first to fourth aspects, and the wiring portion that is inserted and held in the grommet.

  According to the first aspect of the invention, when the wiring portion is pulled and the tube portion is deformed, the projecting portion is in contact with the inner peripheral surface of the panel mounting portion, and one end of the inner peripheral surface of the panel mounting portion. And a gap having an opening sandwiched between the outer peripheral surface of the cylindrical portion and the connecting portion side. And a protrusion part expands the diameter of the end of the internal peripheral surface of a panel attaching part as it displaces to the connection part side. Therefore, the force by which the locking recess provided between the opening of the gap and the connecting portion presses the inner peripheral surface of the through hole of the panel increases. Thereby, even when the wiring part is pulled, it is possible to suppress a decrease in holding force for the grommet to hold the panel.

  According to the second aspect of the invention, as the projecting portion is displaced toward the connecting portion in the gap, the one end of the inner peripheral surface of the panel mounting portion is in contact with the abutting surface of the projecting portion, and the inclined contact surface Accordingly, the diameter of one end of the inner peripheral surface is increased. Therefore, even when the inner peripheral surface of the panel mounting portion is formed in parallel with the central axis, it is possible to suppress a decrease in the holding force with which the grommet holds the panel.

  According to the third aspect of the invention, as the projecting portion is displaced toward the connecting portion due to the deformation of the cylindrical portion, the contact portion with the inner peripheral surface of the inclined panel mounting portion is along the inner peripheral surface. Move to the connection side. Therefore, even if the protruding width of the protruding portion is reduced, the diameter of one end of the inner peripheral surface of the panel mounting portion can be increased to suppress a decrease in holding force for the grommet holding the panel.

  According to the fourth aspect of the invention, the grommet has an outer periphery of the cylindrical portion so that the protruding portion is positioned outside the gap when the wiring portion is not pulled in the direction from the opening side toward the connecting portion side. It is provided on the surface. Therefore, the diameter of one end of the inner peripheral surface of the panel mounting portion is not increased, and the locking recess does not increase the force pressing the inner peripheral surface of the through hole of the panel. It becomes easy to remove the grommet from the panel.

  According to the fifth aspect of the invention, even when the wiring portion that is inserted and held in the grommet is pulled, the grommet can suppress a decrease in the holding force that holds the panel, so that it is difficult to come off from the through hole of the panel. A wiring module can be provided.

It is a perspective view which shows an example of the grommet which concerns on embodiment. It is a cross-sectional perspective view in the A1-A1 cutting line of the grommet of FIG. It is front sectional drawing which shows the state which attached the wiring module provided with the grommet of FIG. 2 to the panel. It is the figure which expanded the vicinity of the panel attaching part of the grommet of FIG. It is the figure which expanded the vicinity of the panel attachment part of the grommet of FIG. 3 in the state by which the wire harness was pulled. It is front sectional drawing to which the vicinity of the panel attachment part of the grommet which concerns on other embodiment was expanded. It is a perspective view which shows the grommet which concerns on a comparison technique. It is front sectional drawing in the A2-A2 cutting line of the grommet of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, parts having the same configuration and function are denoted by the same reference numerals, and redundant description is omitted in the following description.

<1. About Embodiment 1>
Hereinafter, the grommet 20 and the wiring module 1 according to the first embodiment will be described (see FIGS. 1 to 5). The wiring module 1 includes a grommet 20 and a wire harness 18 as a wiring portion (see FIG. 3). The wire harness 18 is held by the grommet 20 by being wrapped with the adhesive tape T together with the cylindrical portion 22 while being inserted through the grommet 20.

  The wire harness 18 is configured by bundling a plurality of electric wires (not shown). A connector (not shown) is connected to the end of each electric wire of the wire harness 18. In a state where the wiring module 1 including the wire harness 18 is incorporated in the vehicle, the connectors attached to the ends of the electric wires are connected to various electric components mounted on the vehicle. That is, the wiring module 1 is used as a component that connects various electrical components mounted on the vehicle.

  The wire harness 18 may include an optical fiber cord or the like. Moreover, the wiring part which becomes the accommodation object of the grommet 20 is not limited to one in which a plurality of electric wires are bundled as described above, and may be configured by only one electric wire.

  The grommet 20 is a member formed entirely of an elastic material such as an elastomer (rubber or the like). The grommet 20 includes a cylindrical portion 22, a panel mounting portion 50, and a connecting portion 70. When the entire grommet 20 is formed of an elastic material such as an elastomer (rubber or the like), there is an advantage that the number of parts can be reduced and the number of assembling steps can be reduced. The grommet 20 is mounted on the vehicle panel 10 in a state where the grommet 20 is sheathed on the wire harness 18.

  The cylindrical part 22 is formed in a cylindrical shape through which the wire harness 18 can be inserted. Preferably, the inner diameter of the cylindrical portion 22 is set smaller than the outer diameter of the wire harness 18. Thereby, in the state which elastically deformed so that the cylinder part 22 was extended, the wire harness 18 was inserted in the cylinder part 22, and after that, the cylinder part 22 elastically contracted the cylinder part 22 so that the wire harness 18 could be Tightened and fixed to the wire harness 18. That is, the cylindrical portion 22 is a cylindrical member that can be inserted and held through the wire harness 18.

  A pair of slits 22 </ b> S extending along the direction of the central axis a <b> 1 is formed at one end of the cylindrical portion 22. With the wire harness 18 inserted into the cylindrical portion 22, the adhesive tape is wound around the portion of the cylindrical portion 22 where the slit 22 </ b> S is formed, so that the wire harness 18 with respect to the cylindrical portion 22 is more reliable. Positioning is fixed.

  The panel mounting part 50 surrounds the outer peripheral surface of the cylinder part 22, and is formed in the cylinder shape. More specifically, the panel mounting portion 50 surrounds at least a part of the outer peripheral surface with a gap 30 between the outer peripheral surface of the cylindrical part 22 and at least a part of the outer peripheral surface in the direction of the central axis a1. . An annular locking recess 40 that can be locked to the inner peripheral edge of the through hole 12 formed in the panel 10 is provided on the outer peripheral surface of the panel mounting portion 50. The panel mounting part 50 includes an annular part 52 and an annular enlarged diameter part 54. An annular diameter-enlarged portion (“guide portion”) 54 extends from one end side (opening 31 side of the gap 30) to the other end side (connecting portion 70 side) of the panel mounting portion 50 along the direction of the central axis a1 of the cylindrical portion 22. The annular portion 52 is provided in this order with the locking recess 40 interposed therebetween.

  The grommet 20 covered with the wire harness 18 is inserted into the through hole 12 from the annular enlarged portion 54 side of the annular enlarged portion 54 and the annular portion 52. The outer peripheral surface of the annular enlarged diameter portion 54 is inclined so as to increase in diameter from one end of the panel mounting portion 50 to the other end side, and a portion in the vicinity of the locking recess 40 in the direction of the central axis a1 forms a top portion having the largest diameter. ing. The outer peripheral surface of the annular enlarged diameter portion 54 is inclined so as to reduce the diameter of the outer peripheral surface from the top portion to a continuous position with the annular portion 52. The annular portion 52 is formed in a cylindrical shape with an outer peripheral surface parallel to the central axis a1. The connecting part 70 connects the cylindrical part 22 and the annular part 52 of the panel mounting part 50. The surface of the annular portion 52 that faces the locking recess 40 extends perpendicular to the central axis a1. An annular water stop lip 58 is erected from the outer periphery of this surface.

  In the operation of routing the wire harness 18 through the through hole 12, the grommet 20 is passed through the through hole 12 of the panel 10 from the slit 22 </ b> S side of the cylindrical portion 22, and the direction from the other end side to the one end side of the panel mounting portion 50. The grommet 20 is pulled. As a result, the peripheral edge of the through-hole 12 moves along the outer peripheral surface of the annular enlarged portion 54 and moves toward the locking recess 40 while bending the annular enlarged portion 54 so that the outer peripheral surface is reduced in diameter. It passes over the top of the portion 54 and falls into the bottom of the locking recess 40 and is locked to the locking recess 40 as shown in FIG. Since the gap 30 is formed, the annular enlarged diameter portion 54 is easily bent so as to reduce the diameter. Although the cross-sectional shape of the locking recess 40 is L-shaped, for example, a U-shape may be adopted, and when the burring is formed on the periphery of the through-hole 12, the burring can be accommodated. Shape is adopted. Moreover, although the external shape of the panel attachment part 50 is formed in the ellipse shape along the internal peripheral surface of the oval through-hole 12, the shape of the through-hole 12 is other shapes, such as circular shape and polygonal shape. If it is, it is set as the shape according to the shape of the through-hole 12. FIG.

  In a state where the locking recess 40 is locked to the through hole 12, the inner peripheral surface of the through hole 12 abuts on the bottom of the locking recess 40, and the annular enlarged diameter portion 54 is the through hole 12 in one main surface of the panel 10. The annular portion 52 contacts the peripheral portion of the through hole 12 in the other main surface of the panel 10. Thereby, the inner peripheral edge portion of the through hole 12 of the panel 10 is sandwiched and locked by the annular portion 52 and the annular enlarged diameter portion 54 in the locking recess 40. When the locking recess 40 locks the through hole 12, the water stop lip 58 falls to the outside in the radial direction of the panel mounting portion 50, and the front end of the water stop lip 58 is in contact with the other main surface of the panel 10. The mounting portion 50 extends outward in the radial direction. Thereby, the front-end | tip of the water stop lip 58 closely_contact | adheres to the other main surface of the panel 10, and water stop is achieved.

  The locking recess 40 is attached to the panel 10 by locking to the inner peripheral edge of the through hole 12. In other words, the panel attachment portion 50 is formed so as to be attachable to the peripheral edge portion (inner peripheral edge portion) of the through hole 12. The gap 30 has an opening 31 sandwiched between one end 51 of the inner peripheral surface 56 of the panel mounting portion 50 in the axial direction of the cylindrical portion 22 and the outer peripheral surface of the cylindrical portion 22. The inner peripheral surface 56 is provided substantially parallel to the central axis a1.

  The connecting part 70 integrally connects a part of the panel mounting part 50 in the axial direction of the cylindrical part 22 and a part of the cylindrical part 22 in the axial direction. In the example of FIGS. 2 and 3, the connecting portion 70 connects a part of the outer peripheral surface of the cylindrical portion 22 and a part of the inner peripheral surface 56 of the panel mounting portion 50. The panel mounting portion 50 is also connected to the cylindrical portion 22 by a plurality of plate-like members 26 extending radially from at least a part of the outer peripheral surface. The plurality of plate-like members 26 are provided in the gap 30 so as to be distributed in the circumferential direction of the panel mounting portion 50.

  The connecting portion 70 is provided on the other end side of the panel mounting portion 50 in the axial direction with respect to the opening 31, and the locking recess 40 is between the connecting portion 70 and the opening 31 in the axial direction of the tube portion 22. Is provided.

  The cylindrical portion 22 includes a protruding portion 23 that protrudes from the outer peripheral surface thereof and faces the opening 31 of the gap 30. In the cylindrical portion 22, the wire harness 18 held by the cylindrical portion 22 in a state where the locking recess 40 is locked to the inner peripheral surface of the through hole 12 is directed from the opening 31 side toward the connecting portion 70 side (FIG. 4, By being pulled in the direction of arrow Y10 in FIG. 5, the protrusion 23 can be deformed so as to be displaced toward the connecting portion 70 (in the direction of arrow Y12 in FIGS. 4 and 5).

  The projecting portion 23 is displaced toward the connecting portion 70 in the gap 30 while contacting the inner peripheral surface 56 of the panel mounting portion 50 due to the deformation of the cylindrical portion 22. The protruding portion 23 is provided so as to increase the diameter of the one end 51 of the inner peripheral surface 56 of the panel mounting portion 50 as it is displaced toward the connecting portion 70 side.

  Specifically, the protruding portion 23 of the grommet 20 includes a contact surface 23 a for contacting the one end 51 of the inner peripheral surface 56 of the panel mounting portion 50. The contact surface 23a is inclined with respect to the central axis a1, that is, the displacement direction of the protruding portion 23 so that the distance from the central axis a1 of the cylindrical portion 22 becomes shorter toward the connecting portion 70 side.

  When the wire harness 18 held by the cylindrical portion 22 in a state where the locking recess 40 is locked to the inner peripheral surface of the through hole 12 is pulled in the direction (arrow Y10 direction) from the opening 31 side toward the connecting portion 70 side. The abutting surface 23a of the protruding portion 23 is displaced toward the connecting portion 70 while abutting one end (tip) of the inner peripheral surface 56 of the panel mounting portion 50. Thereby, one end of the panel attachment part 50 moves to the radial direction outer side of the cylinder part 22 along the inclined contact surface 23a, and one end of the panel attachment part 50 is expanded. Since the locking recess 40 is provided between one end of the panel mounting portion 50 and the connecting portion 70 in the direction of the central axis a1, the locking recess 40 extends around the inner periphery of the through hole 12 and the diameter of the cylindrical portion 22. The force pushing outward in the direction increases. Thereby, the fall of the retention strength in which the panel attaching part 50 hold | maintains the panel 10 is suppressed.

  As described above, the cylindrical portion 22, the panel attachment portion 50, and the connection portion 70 of the grommet 20 form a fixing portion attached to the panel 10. A bellows 22 </ b> J is formed at the other end of the cylindrical portion 22. A plurality of bellows 22J may be provided so that peaks and valleys are alternately arranged, and a fixing portion in which the cylindrical portion 22 and the panel mounting portion 50 are connected by a connecting portion 70 is further provided at the tip thereof. Also good. Thus, if two fixing | fixed parts are connected by the bellows part, the grommet 20 can be attached to each panel in the through-hole each provided in two panels. Even when the relative positional relationship between the two through-holes changes, the wire harness 18 inserted through the grommet 20 is deformed when the bellows part is deformed while the two fixing parts of the grommet 20 are attached to each panel. Can be protected. Further, even when the wire harness 18 is pulled in accordance with a change in the relative positional relationship between the two through holes, a decrease in the panel holding force by the grommet 20 is suppressed.

  In a state where the wire harness 18 is not pulled in the direction from the opening 31 side toward the connecting portion 70 side (“initial state”), the projecting portion 23 is preferably located outside the gap 30 so as to be positioned outside the gap 30. Provided on the outer peripheral surface. Thereby, in the initial state, the protrusion 23 does not contact the panel mounting portion 50 and the force by which the locking recess 40 presses the through hole 12 does not increase, so that the grommet 20 can be easily removed from the panel 10. Further, the grommet 20 can be easily formed. In the initial state, a part of the projecting portion 23 on the connecting portion 70 side may enter the gap 30 from the opening 31 without contacting the panel mounting portion 50. Further, in the initial state, a part of the projecting portion 23 on the side of the connecting portion 70 enters the gap 30, and the abutting surface 23 a abuts on the panel attaching portion 50 so as not to expand one end of the panel attaching portion 50. In addition, a protruding portion 23 may be provided.

<2. About Embodiment 2>
Hereinafter, the grommet 20A and the wiring module 1A according to the second embodiment will be described with reference to FIG. The grommet 20A includes a cylindrical portion 22A, a panel mounting portion 50A, and a connecting portion 70A. The cylindrical portion 22A, the panel mounting portion 50A, and the connecting portion 70A of the grommet 20A are portions having functions corresponding to the cylindrical portion 22, the panel mounting portion 50, and the connecting portion 70 of the grommet 20. The wiring module 1A includes a grommet 20A and a wire harness 18 as a wiring portion (see FIG. 6).

  The cylindrical portion 22A is configured in the same manner as the cylindrical portion 22 except that the protruding portion 23A is provided instead of the protruding portion 23 provided in the cylindrical portion 22. The panel attachment portion 50A has substantially the same configuration as the panel attachment portion 50 except that the inner peripheral surface 56A is inclined with respect to the central axis a1 of the cylindrical portion 22A. The connecting portion 70A is slightly different in shape from the connecting portion 70 in response to the inclination of the panel attaching portion 50A. However, like the connecting portion 70, the connecting portion 70A is connected to the cylindrical portion 22A and the panel attaching portion 50A. Link.

  Of each part of the grommet 20A, a part indicated by a reference sign obtained by adding the letter A to a reference sign of the part constituting the grommet 20 has a function corresponding to the part of the grommet 20 to which the corresponding reference sign is attached. Accordingly, when the protruding portion 23A of the grommet 20A is displaced toward the connecting portion 70A, one end 51A in the direction of the central axis a1 of the inner peripheral surface 56A of the panel mounting portion 50A The configuration and the like related to the movement of expanding the diameter of the end opposite to the portion 70A will be described below. Except for this description, description of each part of the grommet 20A is omitted.

  The inner peripheral surface 56A of the panel mounting portion 50A of the grommet 20A is provided to be inclined with respect to the central axis a1 so that the distance from the central axis a1 of the cylindrical portion 22A becomes shorter toward the connecting portion 70A side. A portion of the protruding portion 23A on the side of the connecting portion 70A is formed with a width smaller than the opening 31A in the radial direction of the cylindrical portion 22A. The surface of the protruding portion 23A that faces the connecting portion 70A is formed perpendicular to the central axis a1, but may be inclined. As the cylindrical portion 22A is deformed and displaced toward the connecting portion 70A, the projecting portion so that the contact portion 57A with the inner peripheral surface 56A of the panel mounting portion 50A moves toward the connecting portion 70A along the inner peripheral surface 56A. 23A is provided.

  The wire harness 18 held by the cylindrical portion 22A in a state where the locking recess 40A is locked to the inner peripheral surface of the through hole 12 is pulled in the direction from the opening 31A side to the connecting portion 70A side (arrow Y10 direction in FIG. 6). If it does, the part by the side of the connection part 70A of the protrusion part 23A will be displaced to the connection part 70A side, contacting the end (tip) 51A of the inner peripheral surface 56A of the panel attachment part 50A. In other words, the contact portion 57A between the protruding portion 23A and the inner peripheral surface 56A is displaced toward the connecting portion 70A. As the contact portion 57A is displaced toward the connecting portion 70A, one end 51A of the panel mounting portion 50A is enlarged in diameter. Since the locking recess 40A is provided between one end of the panel mounting portion 50A and the connecting portion 70A in the direction of the central axis a1, the locking recess 40A extends the inner periphery of the through hole 12 and the diameter of the cylindrical portion 22A. The force pushing outward in the direction increases. Thereby, the fall of the retention strength in which the panel attachment part 50A hold | maintains the panel 10 is suppressed.

  According to the grommet according to the first embodiment (2) configured as described above, when the wire harness 18 is pulled and the cylindrical portion 22 (22A) is deformed, the protruding portion 23 (23A) is attached to the panel. One end 51 (51A) of the inner peripheral surface 56 (56A) of the panel mounting portion 50 (50A) and the outer peripheral surface of the cylindrical portion 22 (22A) while contacting the inner peripheral surface 56 (56A) of the portion 50 (50A) The gap 30 (30A) having the opening 31 (31A) sandwiched between the two is displaced toward the connecting portion 70 (70A). And the protrusion part 23 (23A) expands the diameter of the end 51 (51A) of the internal peripheral surface 56 (56A) of the panel attachment part 50 (50A) as it displaces to the connection part 70 (70A) side. Accordingly, the locking recess 40 (40A) provided between the opening 31 (31A) of the gap 30 (30A) and the connecting portion 70 (70A) presses the inner peripheral surface of the through hole 12 of the panel 10. Power increases. Thereby, even when the wire harness 18 is pulled, it is possible to suppress a decrease in the holding force with which the grommet holds the panel 10.

  Moreover, according to the grommet concerning this Embodiment 1 comprised as mentioned above, the one end 51 of the internal peripheral surface 56 of the panel attaching part 50 protrudes as the protrusion part 23 displaces to the connection part 70 side in the clearance gap 30. Since the cylindrical portion 22 moves radially outward along the inclined contact surface 23a while contacting the contact surface 23a of the portion 23, the diameter of the one end 51 of the inner peripheral surface 56 increases. Therefore, even when the inner peripheral surface 56 of the panel mounting portion 50 is formed in parallel with the central axis, it is possible to suppress a decrease in the holding force with which the grommet holds the panel 10.

  Moreover, according to the grommet concerning this Embodiment 2 comprised as mentioned above, 23 A of protrusion parts are displaced to the connection part 70A side by deformation | transformation of the cylinder part 22A, and the inner peripheral surface of the inclined panel attachment part 50A The contact portion 57A with 56A moves toward the connecting portion 70A along the inner peripheral surface 56A. Therefore, even if the protruding width of the protruding portion 23A is reduced, the diameter of the one end 51A of the inner peripheral surface 56A of the panel mounting portion 50A can be increased, and the decrease in holding force for the grommet holding the panel 10 can be suppressed.

  According to the grommet according to the first embodiment (2) configured as described above, in a state where the wire harness 18 is not pulled in the direction from the opening 31 (31A) side to the connecting portion 70 (70A) side. The protrusion part 23 (23A) is provided in the outer peripheral surface of the cylinder part 22 (22A) so that it may be located outside the clearance gap 30 (30A). Therefore, the diameter of the one end 51 (51A) of the inner peripheral surface 56 (56A) of the panel mounting portion 50 (50A) is not expanded, and the locking recess 40 (40A) is formed on the inner peripheral surface of the through hole 12 of the panel 10. The pressing force does not increase. Thereby, the locking of the locking recess 40 (40A) is released and the grommet can be easily removed from the panel 10.

  According to the wiring module according to the first embodiment (2) configured as described above, even when the wire harness 18 inserted and held in the grommet is pulled, the grommet has a holding force for holding the panel 10. Since the decrease can be suppressed, it is possible to provide a wiring module that is unlikely to be detached from the through hole 12 of the panel 10.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

1,1A Wiring module 10 Panel 18 Wire harness (wiring section)
20, 20A Grommet 22, 22A Tube portion 23, 23A Protruding portion 23a Abutting surface 30, 30A Gap 31, 31A Opening 40, 40A Locking recess 50, 50A Panel mounting portion 51, 51A One end 52, 52A Annular portion 54, 54A Annular diameter expansion part 56, 56A Inner peripheral surface 58 Water stop lip 70, 70A Connection part

Claims (5)

A grommet attached to a panel in a state where it is sheathed on a wiring part including at least one electric wire,
A cylindrical portion that can be inserted and held through the wiring portion;
A cylindrical shape that surrounds at least a portion of the outer peripheral surface in the axial direction of the outer peripheral surface of the cylindrical portion with a gap therebetween and can be attached to a through hole formed in the panel. A panel mounting portion;
A connecting part that connects a part of the panel mounting part in the axial direction and a part of the cylindrical part in the axial direction;
With
An annular locking recess that can be locked to the inner peripheral edge of the through hole is provided on the outer peripheral surface of the panel mounting portion,
The gap has an opening sandwiched between one end of the inner peripheral surface of the panel mounting portion and the outer peripheral surface of the cylindrical portion in the axial direction;
The connecting portion is provided on the other end side of the panel mounting portion in the axial direction with respect to the opening.
The locking recess is provided between the connecting portion and the opening in the axial direction,
The cylindrical portion includes a protruding portion that protrudes from the outer peripheral surface thereof and faces the opening of the gap, and is held by the cylindrical portion in a state where the locking recess is locked to the inner peripheral surface of the through hole. The tubular portion is deformable so that the protruding portion is displaced toward the connecting portion by pulling the wiring portion in a direction from the opening side toward the connecting portion.
The projecting portion is displaced toward the connecting portion in the gap while contacting the inner peripheral surface of the panel attaching portion due to the deformation of the cylindrical portion, and the inner portion of the panel attaching portion is displaced toward the connecting portion side. A grommet provided to expand the diameter of the one end of the peripheral surface. The grommet according to claim 1,
The protrusion includes a contact surface for contacting the one end of the inner peripheral surface of the panel mounting portion,
The said contact surface is a grommet which inclines with respect to the said central axis so that the distance with the central axis of the said cylinder part may become short toward the said connection part side. The grommet according to claim 1,
The inner peripheral surface of the panel mounting part is provided to be inclined with respect to the central axis so that the distance from the central axis of the cylindrical part is shortened toward the connecting part side,
The connecting portion side portion of the protruding portion is formed with a width smaller than the opening in the radial direction of the cylindrical portion,
As the protruding portion is displaced toward the connecting portion due to the deformation of the cylindrical portion, the contact portion with the inner peripheral surface of the panel mounting portion moves toward the connecting portion along the inner peripheral surface. Grommet provided in The grommet according to any one of claims 1 to 3, wherein
A grommet provided on the outer peripheral surface of the cylindrical portion so that the protruding portion is located outside the gap in a state where the wiring portion is not pulled in a direction from the opening side toward the connecting portion side. . A grommet according to any one of claims 1 to 4,
The wiring part inserted and held in the grommet;
A wiring module comprising:

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