JP2021077566A - Waterproof connector - Google Patents

Abstract

To provide a waterproof connector with a novel structure, in which the insertion resistance of a rubber stopper into a wire insertion hole can be reduced and the application of excessive pressing force on the insulation coating of the rubber stopper can be improved, while waterproofness is maintained.SOLUTION: A waterproof connector 10 includes: a housing 14 housing a terminal 12; a wire insertion hole 24 which is provided in the housing 14 and through which a covered wire 16 connected to the terminal 12 is pulled out; and an annular rubber stopper 18 which is attached to the covered wire 16 by extrapolation to liquidtightly seal between the outer peripheral surface of the covered wire 16 and the inner peripheral surface of the wire insertion hole 24. At least one of a pair of axial end faces of the rubber stopper 18 is provided with a recess 60 opening outward in an axial direction.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a waterproof connector provided with a rubber stopper.

Conventionally, a waterproof connector having waterproofness is known as a kind of connector used for electrically connecting between in-vehicle devices. For example, Japanese Patent Application Laid-Open No. 2010-246339 (Patent Document 1) describes a housing for accommodating terminals, an electric wire insertion hole provided in a housing from which a coated electric wire connected to the terminal is drawn out, and external mounting on the coated electric wire. A structure has been proposed in which the rubber stopper is provided and the rubber stopper seals liquid-tightly between the outer peripheral surface of the covered electric wire and the inner peripheral surface of the electric wire insertion hole.

JP-A-2010-246339

By the way, in electric vehicles, hybrid vehicles, etc., since the electric power used is relatively high voltage and large current, the electric wire diameter tends to be large, and the outer diameter of the rubber stopper attached to the coated electric wire also tends to be large. .. Therefore, the insertion resistance when inserting the rubber stopper into the electric wire insertion hole of the housing becomes large, and it may be difficult to assemble the waterproof connector. In addition, as the size and diameter of the coated electric wire increase, the thickness of the insulating coating also increases, so that the pressing force in the diameter reduction direction applied from the rubber stopper to the insulating coating and the amount of sinking of the insulating coating due to this also increase. .. Therefore, stress relaxation is likely to occur in the insulating coating, and it may be difficult to maintain waterproofness.

The present disclosure has been made in the background of the above-mentioned circumstances, and the problem to be solved is to reduce the insertion resistance of the rubber stopper into the electric wire insertion hole while maintaining the waterproof property, and to the insulating coating of the rubber stopper. The purpose is to provide a waterproof connector having a new structure that improves the application of excessive pressing force.

The waterproof connector of the present disclosure includes a housing for accommodating terminals, an electric wire insertion hole provided in the housing from which a coated electric wire connected to the terminal is pulled out, and an outer circumference of the coated electric wire which is externally mounted on the coated electric wire. An annular rubber stopper for liquid-tightly sealing between the surface and the inner peripheral surface of the electric wire insertion hole is provided, and at least one of the pair of axial end surfaces of the rubber stopper is a recess that opens outward in the axial direction. It is a waterproof connector provided with a place.

According to the present disclosure, it is possible to provide a waterproof connector capable of reducing the insertion resistance of a rubber stopper into an electric wire insertion hole and improving the application of excessive pressing force to the insulating coating of the rubber stopper while maintaining waterproofness. ..

FIG. 1 is an exploded perspective view showing a waterproof connector according to an embodiment of the present disclosure. FIG. 2 is an enlarged vertical cross-sectional view showing the waterproof connector in the assembled state in FIG. FIG. 3 is an enlarged cross-sectional view of the rubber stopper in FIG.

<Explanation of Embodiments of the present disclosure>
First, embodiments of the present disclosure will be listed and described.
The waterproof connector of the present disclosure is
(1) A housing for accommodating terminals, an electric wire insertion hole provided in the housing from which a coated electric wire connected to the terminal is pulled out, an outer peripheral surface of the coated electric wire and the electric wire externally mounted on the coated electric wire. An annular rubber stopper that tightly seals between the inner peripheral surface of the insertion hole is provided, and at least one of the pair of axial end surfaces of the rubber stopper is provided with a recess that opens outward in the axial direction. It is a waterproof connector.

According to the waterproof connector of the present disclosure, at least one of the pair of axial end faces of the rubber stopper is provided with a recess that opens outward in the axial direction. Thereby, when the rubber stopper is inserted into the electric wire insertion hole of the housing, the elastic deformation of the rubber stopper is easily allowed by the space due to the recess, and the insertion resistance can be advantageously reduced. Further, since the elastic deformation of the rubber stopper is easily allowed by the space provided by the recess, the pressing force in the diameter reduction direction applied from the rubber stopper to the outer peripheral surface of the coated electric wire is relaxed. As a result, the amount of subduction of the insulating coating constituting the outer peripheral surface of the coated electric wire is also reduced, the occurrence of stress relaxation of the insulating coating can be prevented, and the waterproof property can be stably maintained.

The recesses of the rubber stopper may be provided on at least one of the pair of axial end faces of the rubber stopper, but it is preferable that the recesses are provided on each of the axial end faces. As the shape of the recess of the rubber stopper, any shape can be adopted as long as it accommodates the elastic deformation of the rubber stopper and forms a space that easily allows the elastic deformation.

(2) An annular outer peripheral side seal lip and an annular inner peripheral side seal lip are provided on the outer peripheral surface and the inner peripheral surface of the rubber stopper, respectively, and the outer peripheral side seal lip and the inner peripheral side seal lip are provided. , It is preferable that they are provided at different axial positions from each other. Since the axial positions of the outer peripheral side seal lip and the inner peripheral side seal lip are different from each other, the pressing force in the diameter reduction direction of the rubber stopper is increased as compared with the case where the rubber stoppers are provided at the same axial position. This is because it is possible to prevent the peripheral seal lip portion from becoming excessively large. Thereby, it is possible to provide a waterproof connector capable of preventing the occurrence of stress relaxation of the insulating coating of the coated electric wire while ensuring the sealing property.

(3) In the above (2), the outer peripheral surface of the rubber stopper is provided with an annular groove portion that opens outward in the radial direction, and the depth dimension of the groove portion is from the outer peripheral surface of the rubber stopper. It is preferable that the protrusion height dimension of the outer peripheral side seal lip is larger than that of the above. An annular groove is formed on the outer peripheral surface of the rubber stopper so as to have a depth dimension larger than the protrusion height dimension from the outer peripheral surface of the outer peripheral side seal lip and open outward in the radial direction. This is because the expansion and deformation of the rubber stopper underneath can be advantageously absorbed. As a result, the pressing force applied from the rubber stopper can be reduced, and the occurrence of stress relaxation of the insulating coating due to the pressing force can be advantageously suppressed or prevented.

(4) The recess has a ring shape that continuously extends in the circumferential direction from the radial central portion of the axial end face, and the distance between the side walls of the recess gradually increases from the bottom toward the open end. It is preferable that Since the recess has a ring shape that extends continuously in the circumferential direction, elastic deformation of the rubber stopper in all directions can be stably tolerated by the recess. Further, since the distance between the side walls of the recess gradually increases from the bottom toward the open end, elastic deformation of the axial end surface of the rubber stopper is more advantageously allowed. As a result, it is possible to advantageously prevent a sudden increase in insertion resistance when the rubber stopper is inserted into the electric wire insertion hole.

(5) It is preferable that both ends of the rubber stopper in the axial direction are provided with tapered outer peripheral surfaces that gradually reduce in diameter. This is because the tapered outer peripheral surface avoids a sudden increase in the insertion resistance of the rubber stopper into the electric wire insertion hole, and the insertion work can be performed more advantageously. Further, by providing the tapered outer peripheral surfaces at both ends in the axial direction, it is possible to provide a space that allows elastic deformation of the rubber stopper on the outer peripheral side of both ends in the axial direction of the rubber stopper, which is excessive with respect to the insulating coating of the rubber stopper. The application of pressing pressure is further suppressed.

<Details of Embodiments of the present disclosure>
Specific examples of the waterproof connector of the present disclosure will be described below with reference to the drawings. It should be noted that the present disclosure is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

<The present embodiment>
Hereinafter, embodiments of the present disclosure will be described with reference to FIGS. 1 to 3. As shown in FIGS. 1 and 2, the waterproof connector 10 in the present embodiment includes a housing 14 accommodating the terminal 12, a coated electric wire 16 connected to the terminal 12, and an annular shape externally mounted on the coated electric wire 16. It is configured to include a rubber stopper 18. For ease of understanding, the rubber stopper 18 in FIG. 2 is shown by a virtual line in a state before elastic deformation. Further, for a plurality of the same members, a reference numeral may be added to only a part of the members, and the reference numeral may be omitted for the other members. As is clear from FIG. 1, in the waterproof connector 10 of the present embodiment, two coated electric wires 20 with terminals are housed and held in the housing 14. Since the two coated electric wires 20 with terminals, the rubber stopper 18 attached to the two coated electric wires 20 with terminals, and the back retainer 58 described later all have the same structure, the following description will be described in detail based on the one coated electric wire 20 with terminals. ..

<Housing 14>
As shown in FIGS. 1 and 2, the terminal 12 is housed in the housing 14 of the waterproof connector 10 and is used as the waterproof connector 10. The housing 14 is made of synthetic resin and has a tubular shape that extends in the length direction (left-right direction in FIGS. 1 and 2) and opens in the front-rear direction. At two locations separated in the width direction (in FIG. 2, the direction perpendicular to the paper surface) on the front side (left side in FIGS. 1 and 2) of the housing 14, the covered electric wires 20 with terminals housed in the housing 14 are separated. A terminal insertion hole 22 is formed in which the tip end portion of the terminal 12 is projected to be exposed to the outside. At two locations separated in the width direction on the rear side (right side in FIGS. 1 and 2) of the housing 14, there are wire insertion holes 24 from which the covered wire 16 of the covered wire 20 with a terminal housed in the housing 14 is pulled out. It is formed. The terminal insertion holes 22 and the electric wire insertion holes 24 formed at the above two locations communicate with the cavity 26 which is separated in the width direction and extends in the length direction, respectively. As shown in FIG. 2, the front side of the cavity 26 has a slit shape, and a terminal retainer 28 is provided so as to project inward from the rear end side of the lower inner surface in the shape of a cantilever. A fitting protrusion 30 is provided so as to project from the upper surface of the protruding end of the retainer 28. A recess that opens inward and rearward is formed on the inner surface of the rear end portion of the cavity 26, and this recess constitutes a housing portion 32 that accommodates the rubber stopper 18 and the back retainer 58 described later. Has been done.

Further, as shown in FIG. 1, the housing 14 has legs 34 made of synthetic resin formed separately. The leg portion 34 has a cylindrical shape having a housing insertion hole 36 that opens in the front-rear direction, and a fixing portion that extends downward and forward in an L shape at the lower end portion on the front side of the leg portion 34. 38 is formed. At both ends of the fixing portion 38 in the width direction, bolt tightening portions 42 having a rectangular flat plate shape protruding forward and having a bolt insertion hole 40 penetrating in the central portion are provided. The bolt tightening portion 42 of the fixing portion 38 is bolted to a predetermined position of the vehicle (not shown). On the other hand, the upper surface of the housing 14 is provided with a leg retainer 44 that projects rearward from the tip of the housing 14 in a cantilever shape, and engages with the upper surface of the protruding end of the leg retainer 44. The protrusion 46 is projected. Then, by inserting the housing insertion hole 36 of the leg portion 34 into the housing 14 from the rear side of the housing 14, the engaging projection 46 of the leg retainer 44 of the housing 14 is engaged with the rear end portion of the leg portion 34. The housing 14 is configured.

<Terminal 12>
As shown in FIGS. 1 and 2, the terminal 12 is a flat plate-shaped connection terminal. As the material of the terminal 12, for example, a metal material such as copper, copper alloy, aluminum, aluminum alloy, or stainless steel can be appropriately used. The terminal 12 may be surface-treated such as silver-plated, tin-plated, or aluminum-plated depending on the type of the constituent metal and the usage environment. For example, a metal plate having excellent conductivity is press-punched. Can be formed by. The terminal 12 has a mating terminal connecting portion 48 that is electrically connected to a mating terminal (not shown) on the tip side (left side in FIGS. 1 and 2), and has a base end side (FIGS. 1 and 2). An electric wire connecting portion 50 connected to the covered electric wire 16 is formed on the middle and right sides). The core wire 52 of the covered electric wire 16 is electrically connected to the electric wire connecting portion 50. In the coated electric wire 16, the core wire 52 composed of a single core wire or a stranded wire made of copper, aluminum or other metal wire as a conductor is covered with an insulating coating 54 having electrical insulation such as an ethylene resin or a styrene resin. It is said to have a structure. Then, the core wire 52 exposed by stripping the insulating coating 54 at the terminal of the covered electric wire 16 is fixed to the electric wire connecting portion 50 of the terminal 12 by using a known technique such as resistance welding, so that the core wire 52 of the coated electric wire 16 is fixed. Is conductively connected to the terminal 12. Further, the terminal 12 has an engaging hole 56 having a rectangular cross-sectional shape formed between the mating terminal connecting portion 48 and the electric wire connecting portion 50 and extending in the length direction. The engagement hole 56 is formed so as to penetrate the terminal 12 in the plate thickness direction.

<Rubber stopper 18>
As shown in FIGS. 1 and 2, a rubber stopper 18 and a back retainer 58 are attached to the terminal of the covered electric wire 16. That is, at the rear end of the housing 14 from which the covered electric wire 16 connected to the terminal 12 is pulled out, an annular shape is formed so as to liquidally seal between the outer peripheral surface of the coated electric wire 16 and the inner peripheral surface of the electric wire insertion hole 24. A rubber stopper 18 is attached. As shown in FIGS. 1 to 3, the rubber stopper 18 is made of an elastic material such as silicone rubber, and has a rectangular cross section extending in an annular shape. U-groove-shaped recesses 60 that open outward in the axial direction are provided on both end surfaces of the rubber stopper 18 in the axial direction (left-right direction in FIGS. 1 to 3). The recess 60 has a ring shape in which the central portion in the radial direction extends continuously over the entire circumference in the circumferential direction on both end faces in the axial direction, and the distance between the side walls of the recess 60: d (see FIG. 3). ) Gradually increases from the bottom 62 toward the opening end 64.

As shown in FIGS. 1 to 3, two annular outer peripheral side seal lips 68 are provided on the outer peripheral surface 66 of the rubber stopper 18 so as to be axially separated from each other, and are provided on the inner peripheral surface 70 of the rubber stopper 18. Is provided with three annular inner peripheral side seal lips 72 separated in the axial direction. As a result, the outer peripheral side seal lip 68 and the inner peripheral side seal lip 72 are provided at different positions in the axial direction. Both of the two outer peripheral side seal lips 68 have a triangular cross-sectional shape, whereby the tapered outer peripheral surface 74 whose diameter is gradually reduced outward in the axial direction at both ends in the axial direction of the outer peripheral surface 66 of the rubber stopper 18. Is provided. An annular groove 76 that opens radially outward (upper in FIG. 3) is provided between the two outer peripheral side seal lips 68. The groove portion 76 is formed so as to continuously extend over the entire circumference of the outer peripheral surface 66 of the rubber stopper 18 in the circumferential direction, and the distance between the side walls of the groove portion 76: e (see FIG. 3) is an open end from the bottom portion 78. It is gradually increasing toward 80. Further, as shown in FIG. 3, the depth dimension of the groove 76: D is made larger than the protrusion height dimension of the outer peripheral side seal lip 68 from the outer peripheral surface 66 of the rubber stopper 18: H (D> H). ). Of the three annular inner peripheral side seal lips 72, the inner peripheral side seal lips 72 on both sides in the axial direction all have a triangular cross-sectional shape, whereby both ends in the axial direction of the inner peripheral surface 70 of the rubber stopper 18 are formed. Is provided with a tapered inner peripheral surface 86 whose diameter is gradually reduced outward in the axial direction. The inner peripheral side seal lip 72 at the central portion in the axial direction has a trapezoidal cross-sectional shape. An annular groove 82 that opens radially outward (lower in FIG. 3) is provided between each of the three inner peripheral side seal lips 72. Each of the groove portions 82 is formed so as to continuously extend over the entire circumference of the inner peripheral surface 70 of the rubber stopper 18 in the circumferential direction. The bottom portion 84 of the groove portion 82 is a flat surface extending along the axial direction (see FIG. 3).

<Back retainer 58>
As shown in FIGS. 1 and 2, the back retainer 58 has a spectacle shape in which two annular back retainer bodies 88 having an electric wire insertion hole 87 at the center are connected by a flat plate-shaped connecting portion 90 extending in the radial direction. have. More specifically, in the back retainer 58, the peripheral wall of the two back retainer main bodies 88 connected to the connecting portion 90 and the connecting portion 90 and the peripheral wall of one back retainer main body 88 located at a position facing the connecting portion 90 are vertically divided. Has been done. Further, in the back retainer 58, the peripheral wall of the other back retainer main body 88 located at a position facing the connecting portion 90 is a thin hinge portion 92, and the two members divided in the vertical direction as a whole are hinged and connected. Has a structure.

<Assembly method of this embodiment>
The assembling method of the present embodiment will be briefly described below. First, the back retainer 58 and the rubber stopper 18 are inserted into the insulating coating 54 at the end of the coated electric wire 16 in advance in the order described. Next, the terminal 12 is prepared, and the core wire 52 of the covered electric wire 16 is conductively connected to the electric wire connecting portion 50 of the terminal 12 by using a known technique such as resistance welding. The two covered electric wires 16 configured in this way are inserted into the cavities 26 in the housing 14 to which the legs 34 are assembled from the electric wire insertion holes 24 side, respectively, and pushed all the way in. As a result, the mating terminal connection portion 48 of the terminal 12 protrudes outward from the terminal insertion hole 22, and the fitting projection 30 of the terminal retainer 28 provided in the housing 14 with respect to the engagement hole 56 of the terminal 12. Are to be fitted. After that, the rubber stopper 18 and the back retainer 58 are moved to the housing 14 side, and the rubber stopper 18 and the back retainer 58 are accommodated and fixed in the accommodating portion 32 of the housing 14 by a fixing structure (not shown), and the waterproof connector 10 of the present embodiment is accommodated and fixed. Is completed. That is, as shown in FIG. 2, the rubber stopper 18 is mounted so as to liquidally seal between the outer peripheral surface of the coated electric wire 16 and the inner peripheral surface of the electric wire insertion hole 24. Further, the rubber stopper 18 is prevented from coming off by the back retainer 58. As shown in FIGS. 1 and 2, in the present embodiment, two coated electric wires 20 with terminals are similarly mounted on the housing 14 by the above-mentioned assembling method.

According to the waterproof connector 10 of the present disclosure having such a structure, recesses 60 that open outward in the axial direction are provided on both end faces in the axial direction of the rubber stopper 18. As a result, when the rubber stopper 18 is inserted into the accommodating portion 32 in the housing 14, the rubber stopper 18 is easily elastically deformed due to the presence of the recess 60, so that the insertion resistance can be advantageously reduced, and the rubber stopper 18 can be advantageously reduced. The pressing force in the diameter reduction direction applied from 18 to the outer peripheral surface of the covered electric wire 16 is relaxed. Therefore, since the amount of sinking of the insulating coating 54 constituting the outer peripheral surface of the coated electric wire 16 can be reduced, the occurrence of stress relaxation of the insulating coating 54 can be prevented and the waterproof property can be stably maintained. Further, since the recess 60 has a ring shape that extends continuously over the entire circumference in the circumferential direction, elastic deformation of the rubber stopper 18 with respect to an external force in all directions can be stably tolerated. Moreover, since the distance between the side walls of the recess 60: d gradually increases from the bottom portion 62 toward the opening end 64, elastic deformation on both end faces in the axial direction of the rubber stopper 18 is more advantageously allowed. Therefore, when the rubber stopper 18 is inserted into the accommodating portion 32 in the housing 14, a sudden increase in insertion resistance can be advantageously prevented.

In addition, since the outer peripheral side seal lip 68 and the inner peripheral side seal lip 72 are provided at different positions in the axial direction, it is avoided that the rubber stopper 18 is partially thickened. Therefore, it is advantageously avoided that the pressing force in the diameter reduction direction becomes excessively large due to the partial thickening of the rubber stopper 18. Thereby, it is possible to provide the waterproof connector 10 capable of preventing the occurrence of stress relaxation of the insulating coating 54 of the coated electric wire 16 while ensuring the sealing property. Further, since the groove portion 76 is formed so as to continuously extend over the entire circumference of the outer peripheral surface 66 of the rubber stopper 18 in the circumferential direction, the expansion and deformation of the rubber stopper 18 in a high temperature environment is also advantageously absorbed. be able to. Therefore, since the pressing force applied from the rubber stopper 18 in the diameter reduction direction can be reduced, the occurrence of stress relaxation of the insulating coating 54 due to the pressing force can be advantageously suppressed or prevented.

Further, on the outer peripheral surface 66 of the rubber stopper 18, the annular groove portion 76 has a protrusion height dimension from the outer peripheral surface of the outer peripheral side seal lip 68: a depth dimension larger than H: D, and is radially outward. It is provided with an opening. As a result, the expansion and deformation of the rubber stopper 18 in a high temperature environment can be advantageously absorbed, and the pressing force applied from the rubber stopper 18 in the diameter reduction direction can be reduced. Occurrence can be advantageously suppressed or prevented.

Further, tapered outer peripheral surfaces 74 that gradually reduce in diameter outward in the axial direction are provided at both ends of the outer peripheral surface 66 of the rubber stopper 18 in the axial direction. As a result, when the rubber stopper 18 is inserted into the accommodating portion 32 in the housing 14, it is possible to avoid a sudden increase in the insertion resistance due to the thickening of the rubber stopper 18, and the insertion work can be performed more advantageously.

<Other Embodiments>
The techniques described herein are not limited to the embodiments described above and in the drawings, and for example, the following embodiments are also included in the technical scope of the techniques described herein.

(1) In the above embodiment, the recesses 60 are provided on both end faces in the axial direction, but the present invention is not limited to this, and the recesses 60 may be provided on either end face. Further, the shape of the recess 60 is not limited to the example in which the distance between the side walls: d gradually increases from the bottom portion 62 toward the opening end 64, and a space for easily allowing elastic deformation of the rubber stopper 18 is formed. Any shape can be adopted as long as it does. Further, although the recess 60 has a ring shape that extends continuously over the entire circumference in the circumferential direction, a plurality of recesses may be divided and provided at a plurality of locations in the circumferential direction. A plurality of annular recesses may be arranged concentrically. In addition, it is not always necessary to provide tapered outer peripheral surfaces 74 that gradually reduce in diameter at both ends in the axial direction of the illustrated rubber stopper 18, and any shape can be adopted for the outer peripheral surfaces of both ends in the axial direction of the rubber stopper 18. ..

(2) Further, in the above embodiment, the outer peripheral surface 66 of the rubber stopper 18 is provided with two outer peripheral side seal lips 68, and the inner peripheral surface 70 of the rubber stopper 18 is provided with three inner peripheral side seal lips 72. The outer peripheral side seal lip 68 and the inner peripheral side seal lip 72 are provided at different positions in the axial direction, but the present invention is not limited to this. The number and axial position of the outer peripheral side seal lip 68 and the inner peripheral side seal lip 72 can be arbitrarily set. For example, the number of the outer peripheral side seal lip 68 and the inner peripheral side seal lip 72 may be the same, and the axial positions may be staggered from each other. The shape and groove depth of the groove 76 between the outer peripheral side seal lips 68 and 68 are not limited to those exemplified, and can be arbitrarily set according to the characteristics required for the rubber stopper 18.

10 Waterproof connector 12 Terminal 14 Housing 16 Coated electric wire 18 Rubber stopper 20 Coated electric wire with terminal 22 Terminal insertion hole 24 Electric wire insertion hole 26 Cavity 28 Terminal retainer 30 Fitting protrusion 32 Housing part 34 Leg part 36 Housing insertion hole 38 Fixing part 40 Bolt Insertion hole 42 Bolt tightening part 44 Leg retainer 46 Engagement protrusion 48 Mating side terminal connection part 50 Electric wire connection part 52 Core wire 54 Insulation coating 56 Engagement hole 58 Back retainer 60 Recession 62 Bottom 64 Opening end 66 Outer peripheral surface 68 Outer peripheral side Seal lip 70 Inner peripheral surface 72 Inner peripheral side seal lip 74 Tapered outer peripheral surface 76 Groove 78 Bottom 80 Opening end 82 Groove 84 Bottom 86 Tapered inner peripheral surface 87 Wire insertion hole 88 Back retainer body 90 Connecting part 92 Hing part

Claims (5)

The housing that houses the terminals and
An electric wire insertion hole provided in the housing from which a covered electric wire connected to the terminal is pulled out, and
It is provided with an annular rubber stopper that is extrapolated to the coated electric wire and seals liquid-tightly between the outer peripheral surface of the coated electric wire and the inner peripheral surface of the electric wire insertion hole.
A waterproof connector in which at least one of the pair of axial end faces of the rubber stopper is provided with a recess that opens outward in the axial direction. An annular outer peripheral side seal lip and an annular inner peripheral side seal lip are provided on the outer peripheral surface and the inner peripheral surface of the rubber stopper, respectively, and the outer peripheral side seal lip and the inner peripheral side seal lip are mutually provided. The waterproof connector according to claim 1, which is provided at different axial positions. An annular groove portion that opens outward in the radial direction is provided on the outer peripheral surface of the rubber stopper, and the depth dimension of the groove portion is the protrusion height of the outer peripheral side seal lip from the outer peripheral surface of the rubber stopper. The waterproof connector according to claim 2, which is larger than the dimension. The recess has a ring shape that continuously extends in the circumferential direction from the radial central portion of the axial end face, and the distance between the side walls of the recess gradually increases from the bottom toward the open end. The waterproof connector according to any one of claims 1 to 3. The waterproof connector according to any one of claims 1 to 4, wherein tapered outer peripheral surfaces that gradually reduce in diameter are provided at both ends in the axial direction of the rubber stopper.

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