JP2012169149A - Waterproof connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a rubber plug from turning over when it is mounted.SOLUTION: A rubber plug 19 is formed of a block-like electric wire seal part 20, and a housing seal part 13 extending in a tubular shape forward from the electric wire seal part 20. The housing seal part 13 is inserted between a terminal housing part 4 and a cylindrical part 26, and an inner peripheral lip 23 and an outer peripheral lip 27 sealing them are formed. A rib 28 projects along a forward and backward direction on a rear side of the outer peripheral lip 27, which is an outer periphery of the rubber plug 19. While the rubber plug 19 is mounted, a clearance C is secured between the rib 28 of the electric wire seal part 20 and the cylindrical part 26 of a holder 16. If turning-over deformation occurs when the housing seal part 13 is fitted with a rear end of the terminal housing part 4, a deformation action of the housing seal part 13 is restrained by the rib 28.

Description

  The present invention relates to a waterproof connector using a batch type rubber stopper.

  Some conventionally known waterproof connectors include a rubber plug of a type that collectively seals a plurality of electric wires. Such a rubber plug is accommodated in a rubber plug accommodating portion provided on the rear surface of the connector housing while receiving a compressive force from the surroundings to secure a seal with the connector housing.

  By the way, the rubber plug described above is formed in a plate shape having a predetermined thickness. In other words, a portion for sealing the connector housing (outer peripheral portion) and a portion for sealing the electric wires (each electric wire is inserted). The inner peripheral portion of the seal hole is substantially at the same position in the front-rear direction. Therefore, for example, when the connector is used at a high temperature and deformation occurs such that the opening of the rubber plug housing portion is widened, the sealing performance for the connector housing is lowered and the sealing performance for the electric wire is lowered at the same time. . As a countermeasure against this, it has been considered that the part for sealing the connector housing and the part for sealing the electric wire are shifted in the front-rear direction. As such a thing, the thing of the following patent document 1 can be mentioned.

JP 2006-66208 A

  The rubber plug in the above-described one is formed in a state where the electric wire seal portion in which a plurality of seal holes are formed and the housing seal portion are displaced forward and backward. However, since the housing seal portion is formed in a cylindrical shape toward the front of the wire seal portion formed in a block shape, the housing seal portion is less rigid than the wire seal portion, and the housing seal portion Deformation tends to occur during assembly. In particular, since the portion on the connector housing side into which the housing seal portion is inserted is narrow, there is a concern that “turn-up” tends to occur at the tip during assembly, and the assembly workability is lowered.

  The present invention has been completed based on the above-described circumstances, and an object of the present invention is to provide a waterproof connector that can smoothly incorporate a waterproof rubber plug and can ensure good sealing performance. To do.

  As means for achieving the above object, the invention of claim 1 is directed to a terminal accommodating portion having a plurality of cavities and a cylindrical rubber plug extending backward while covering the rear end portion of the terminal accommodating portion. A connector housing having a receiving portion, a plurality of terminal fittings connected to the end portion of the electric wire and accommodated in the cavity, and arranged corresponding to the cavities, each of which can be inserted through the terminal fitting, and the electric wire A rubber plug that has a plurality of seal holes that are inserted in a watertight state and are incorporated into the rubber plug housing portion, and a rear surface of the rubber plug that is attached to the connector housing and contacts the rear surface of the rubber plug The rubber plug has a block-shaped electric wire seal portion in which the seal hole is formed and allows the electric wires to be inserted in a sealed state, and forward from the electric wire seal portion. It protrudes in a cylindrical shape that can be fitted to the outer peripheral surface of the rear end portion of the terminal accommodating portion, and when the rubber plug is accommodated in the rubber stopper accommodating portion, the outer peripheral surface of the terminal accommodating portion is contacted in a sealed state. The housing seal portion is in contact with the housing seal portion, and the housing seal portion is characterized in that a rib for restricting the housing seal portion from being turned outward is formed to protrude.

  According to a second aspect of the present invention, in the first aspect of the present invention, a sealing lip is formed to protrude along the circumferential direction on the outer peripheral surface of the housing seal portion, while the rib is disposed along the front-rear direction. And its front end is characterized in that it is connected to the lip.

  The invention of claim 3 is the substrate part according to claim 1 or 2, wherein the holder has a plurality of through holes into which the terminal fittings can be loosely inserted, and is accommodated in the rubber plug accommodation part. And a cylindrical portion extending forward from the substrate portion into a cylindrical shape and inserted between an inner wall surface of the rubber plug housing portion and an outer peripheral surface of the rubber plug, and the cylindrical portion in the mounted state of the holder The inner peripheral surface of the wire is in close contact with the lip in a watertight manner, but is characterized in that a clearance is provided between the outer peripheral surface of the wire seal portion.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the front end portion of the housing seal portion interferes with the rear end surface of the terminal accommodating portion on the inner peripheral surface side thereof. This is characterized in that the relief surface for avoiding the above is formed in a tapered shape.

  The invention according to claim 5 is characterized in that, in any one of claims 1 to 4, a reinforcing build-up portion is formed on the inner surface side of the base portion of the housing seal portion. Have.

<Invention of Claim 1>
According to the first aspect of the present invention, when the rubber plug is accommodated in the rubber plug accommodating portion of the connector housing, the housing seal portion is fitted to the outer peripheral surface of the rear end portion of the terminal accommodating portion. Thereby, the inner peripheral surface side of the housing seal portion abuts on the outer peripheral surface of the terminal accommodating portion in a sealed state.

  When the housing seal portion described above is fitted to the terminal accommodating portion, if the tip of the housing seal portion abuts against the terminal accommodating portion, the housing seal portion is subjected to a force that turns up. In such a case, according to the first aspect of the invention, since the rigidity of the ribs formed on the outer peripheral surface side of the housing seal portion is enhanced, the turning-up is effectively restricted. This makes it possible to smoothly perform the operation of attaching the rubber plug to the rubber plug housing portion.

<Invention of Claim 2>
According to the invention of claim 2, since the front end of the rib is connected to the lip, even if the lip slides on the other side wall surface during the assembling operation, the lip falls and is deformed. It is maintained in a normal posture and a good sealing state is obtained.

<Invention of Claim 3>
When the electric wire is inserted into the seal hole, the meat around the seal hole moves outward. At this time, if the outer peripheral surface of the electric wire seal portion is pressed from the periphery, the meat around the seal hole is adjacent. Since it is moved toward the seal hole, the seal hole and the cavity may be misaligned, which may hinder the work of inserting the terminal fitting. In that respect, according to the invention of claim 3, a clearance is set between the outer peripheral surface of the electric wire seal portion and the inner peripheral surface of the cylindrical portion of the holder, and even if the electric wire is inserted into the seal hole, Since the meat can be released to the outer peripheral side, the problem of positional deviation between the seal hole and the cavity can be effectively alleviated, which contributes to the improvement of the workability of inserting the terminal fitting.

<Invention of Claim 4>
According to the invention of claim 4, the housing seal portion can be smoothly fitted to the outer peripheral surface of the rear end of the terminal accommodating portion by the tapered relief surface provided at the tip of the housing seal portion.

<Invention of Claim 5>
According to the fifth aspect of the present invention, it is possible to more reliably avoid turning up of the housing seal portion by the built-up portion formed at the base portion of the housing seal portion.

Side view of waterproof connector Rear view of connector housing Same top view Front view of waterproof rubber stopper Similarly back view Same side view Front view of holder Side sectional view of the connector housing with a rubber plug FIG. 8 is a side sectional view showing a state in which a holder is further mounted from the state of FIG. Sectional drawing which expands and shows the sealing situation in a housing seal part

<Embodiment 1>
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings. The connector of this embodiment has a connector housing 1 made of synthetic resin (in this embodiment, a female connector housing). The connector housing 1 includes a terminal accommodating portion 4 in which a cavity 3 for accommodating a plurality of terminal fittings 2 (female terminal fittings) is formed, and a rectangular tubular rubber plug accommodating portion extending rearward from the terminal accommodating portion 4. 5. The rear end portion of the terminal housing portion 4 is surrounded by the rubber plug housing portion 5 in a protruding state.

  In the terminal accommodating portion 4 of the present embodiment, three cavities 3 are arranged in the vertical direction, and the lowermost row of cavities 3 accommodates the terminal fittings 2 that are larger than the upper two cavities 3. ing. In any cavity 3, the lance 6 is formed so as to be able to bend toward the front end portion, and is locked to the terminal fitting 2 inserted at the normal depth position to prevent the lance 6 from coming off.

  As shown in FIG. 3, a retainer mounting hole 7 is formed on the side surface of the connector housing 1 over the entire width and communicates with all the cavities 3. A retainer 8 can be mounted in the retainer mounting hole 7, and the retainer 8 is locked to a temporary locking position that allows insertion / extraction of the terminal fitting 2 and the terminal fitting 2, and the terminal fitting 2 is doubled together with the lance 6. It is possible to move between the main locking positions locked to the. FIG. 1 shows a state in which the retainer 8 is in the temporary locking position.

  Here, the terminal fitting 2 will be briefly described. The terminal fitting 2 is attached to the terminal portion of the electric wire W. A connecting portion 2A that is electrically connected to a terminal fitting (male terminal fitting) to be connected is formed at the front portion of the terminal fitting 2, and a barrel portion 2B for fixing to the electric wire W is formed at the rear portion. ing. A locking projection 9 that is locked by the lance 6 is formed on the upper surface of the connecting portion 2A, and the rear end of the connecting portion 2A is locked to the retainer 8.

  A front member 10 is attached to the front end portion of the connector housing 1. The front member 10 has a hood portion 10 </ b> A that fits in the front portion of the connector housing 1, and a through hole 11 that can communicate with the retainer mounting hole 7 is opened on a side surface thereof. Further, the front member 10 is attached to the connector housing 1 so that the rubber ring 12 fitted on the outer peripheral surface of the terminal accommodating portion 4 and the stepped portion with the rubber stopper accommodating portion 5 is prevented from coming off. Also fulfills.

  The rubber plug housing portion 5 has a rectangular tube shape that is slightly larger than the terminal housing portion 4 and opens rearward. Further, as described above, the rear end portion of the terminal accommodating portion 4 protrudes into the rubber stopper accommodating portion 5, and the seal receiving surface 14 for the housing seal portion 13 of the rubber stopper 19 described later is formed on the outer peripheral surface thereof. . A chamfer 15 is tapered on the outer peripheral surface side of the rear end of the terminal accommodating portion 4.

  Lock pieces 17 for the holder 16 are arranged at a plurality of locations in the rubber stopper housing 5. In the present embodiment, the rubber stopper accommodating portion 5 is disposed at one place in the center on the upper surface (see FIG. 2) and at two places on the lower surface on the left and right. Each of the lock pieces 17 has a pair of cuts in the front-rear direction from the opening edge of the rubber stopper accommodating portion 5 so that the region between the lock pieces 17 (the lock piece 17) can be bent outward. A lock hole 18 is opened.

  Next, the rubber stopper 19 will be described (see FIGS. 4 to 6). The rubber plug 19 is integrally formed of a rubber material having good flexibility. The rubber plug 19 includes an electric wire seal portion 20 formed in a block shape and a housing seal portion 13 that protrudes forward from the electric wire seal portion 20 in a cylindrical shape.

  The wire seal portion 20 is formed to be slightly smaller than the inner peripheral surface of the rubber plug housing portion 5, and a plurality of circular seal holes 21 penetrate therethrough corresponding to the respective cavities 3. When the rubber plug 19 is attached to the connector housing 1 in a normal state, each seal hole 21 communicates with the corresponding cavity 3 coaxially. Each of the seal holes 21 can be inserted through the corresponding terminal fitting 2, and a plurality of seal protrusions 22 are provided on the inner peripheral surface (see FIG. 1). Three seal protrusions 22 provided in each seal hole 21 are provided in the front-rear direction, and each seal protrusion 22 protrudes in an annular shape along the entire circumference of the seal hole 21. When the terminal fittings 2 are accommodated in the corresponding cavities 3 at the normal depth positions, the seal protrusions 22 are in close contact with the outer peripheral surface of the electric wire W in a watertight state. Tapered guiding surfaces 21A and 21B are formed around the opening surfaces before and after each seal hole 21.

  The housing seal portion 13 has an outer peripheral surface that is substantially flush with the outer peripheral surface of the wire seal portion 20. On the inner peripheral surface side, an inner peripheral lip 23 that can contact the seal receiving surface 14 of the terminal accommodating portion 4 in a watertight state protrudes in an annular shape over the entire periphery. A tapered relief surface 24 is formed on the inner peripheral surface side at the tip of the housing seal portion 13. Due to the relief surface 24, it is possible to avoid a situation in which the housing seal portion 13 and the rear end surface of the terminal accommodating portion 4 interfere when the rubber plug 19 is attached. The relief surface 24 in the present embodiment is set to have the same slope as the front surface side of the inner peripheral lip 23 and is formed to be a continuous tapered surface.

  Further, a built-up portion 25 is formed over the entire circumference on the inner peripheral surface side of the housing seal portion 13 and at the boundary portion (corner portion) with the wire seal portion 20 (see FIGS. 8 and 10). ). The built-up portion 25 is formed so as to face the chamfer 15 at the rear end portion of the terminal accommodating portion 4 with the rubber plug 19 attached. By providing this build-up portion 25, the rigidity of the base portion of the housing seal portion 13 is enhanced, and the turning up to the outer peripheral side is alleviated.

  On the other hand, on the outer peripheral surface side of the housing seal portion 13, an outer peripheral lip 27 that abuts the cylindrical portion 26 of the holder 16 in a watertight state protrudes in an annular shape over the entire periphery. The outer peripheral lip 27 and the inner peripheral lip 23 are arranged at substantially the same position in the front-rear direction. The outer peripheral lip 27 is formed to have a higher protruding height than the inner peripheral lip 23.

  As shown in FIGS. 5 and 6, a plurality of reinforcing ribs 28 are arranged on the outer peripheral surface of the rubber plug 19 at predetermined intervals in the circumferential direction. Each rib 28 has a substantially trapezoidal cross section and projects between the housing seal portion 13 and the wire seal portion 20 and extends in the front-rear direction. More specifically, the front end is connected to the outer peripheral lip 27, and the rear end is formed with a length that reaches almost the rear end of the wire seal portion 20. As shown in FIG. 5, the arrangement density of each outer peripheral lip 27 is arranged so that the central portion in the length direction is dense on both sides of the wire seal portion 20 when viewed from the rear side. Yes.

  Each rib 28 is formed to have a uniform protruding height over the entire length, and the height dimension thereof is sufficiently lower than the outer peripheral lip 27 in the natural state. Further, even in a state where the rubber plug 19 is assembled in the rubber plug housing portion 5, each rib so that a predetermined clearance C is held between each rib 28 and the inner peripheral surface of the cylindrical portion 26 of the holder 16. There are 28 height settings.

  The holder 16 is made of synthetic resin, and includes a substrate portion 29 that contacts the rear surface of the wire seal portion 20 and a cylindrical portion 26 that protrudes forward from the substrate portion 29. The substrate portion 29 is formed so as to be fitted inside the rubber stopper housing portion 5, and a plurality of through holes 30 are opened in correspondence with the cavities 3 and the seal holes 21 here. Each through-hole 30 is positioned substantially coaxially with the cavity 3 and the seal hole 21 in a state where the holder 16 is mounted, and the corresponding terminal fitting 2 and electric wire W can be loosely inserted therein. Lock protrusions 31 are formed on the upper and lower surfaces of the outer peripheral surface of the substrate portion 29 so as to correspond to the lock pieces 17 in a total of three locations. The holder 16 is attached to the rubber stopper housing 5 in a state of being prevented from coming off. In the state where the holder 16 is mounted in the rubber plug housing portion 5, the rear end surface thereof is retracted to be slightly flush with the rear end surface of the rubber plug housing portion 5. In this attached state, the front surface of the substrate portion 29 is set so that an appropriate compressive force can be applied to the rear surface of the wire seal portion 20 of the rubber plug 19.

  The cylindrical portion 26 extends forward substantially flush with the outer peripheral surface of the substrate portion 29, and when the holder 16 is mounted, the front end portion of the cylindrical portion 26 is a gap between the housing seal portion 13 and the rubber plug accommodating portion 5. And enters into contact with the outer peripheral lip 27 in a watertight state. Further, in the state where the holder 16 is mounted, as described above, a predetermined clearance C is held over the entire circumference between the inner peripheral surface of the cylindrical portion 26 and the wire seal portion 20.

  Next, the effect of this embodiment comprised as mentioned above is demonstrated concretely. The operation of assembling the connector of this embodiment will be described. First, the operation of attaching the rubber plug 19 to the connector housing 1 is performed (see FIG. 8). In this case, the rubber plug 19 is inserted into the rubber plug housing 5 with the housing seal 13 side facing forward, and the housing seal 13 is fitted to the rear end of the terminal housing 4. Thereby, the inner peripheral lip 23 is in close contact with the seal receiving surface 14 over the entire periphery.

  By the way, when the housing seal portion 13 is fitted to the rear end portion of the terminal accommodating portion 4, there is a concern that the housing seal portion 13 may be turned up when a positional deviation occurs between them. However, in this embodiment, since the reinforcing rib 28 is provided from the position where it enters the housing seal portion 13, the bending strength against the upward deformation of the housing seal portion 13 is increased. Therefore, the phenomenon of the housing seal portion 13 being turned up can be effectively mitigated. In addition, since the rib 28 is connected to the rear side of the outer peripheral lip 27, the outer peripheral lip 27 is restricted from being tilted backward and this also contributes to the restriction of turning up. In addition, the built-up portion 25 provided on the inner peripheral side of the base portion of the housing seal portion 13 also contributes to the improvement of the turning-up prevention function.

  Further, the escape surface 24 formed at the front end of the housing seal portion 13 avoids interference with the terminal housing portion 4, and even if there is a slight misalignment, the chamfer 15 formed on the terminal housing portion 4 side A function of guiding the entire rubber plug 19 to the normal position by the cooperative action can be expected.

  Subsequently, the holder 16 is assembled. First, the tube portion 26 side is fitted into the rubber plug housing portion 5 with the front side facing forward. That is, while inserting the front end side of the cylinder part 26 between the housing seal part 13 and the rubber stopper accommodating part 5, it pushes in while making the front surface of the board | substrate part 29 contact | abut on the rear surface of the electric wire seal part 20. FIG. During this time, the lock pieces 17 are bent outward by the lock projections 31 of the holder 16 and the lock pieces 17 are restored when the lock holes 18 and the lock projections 31 are fitted. Lock. As a result, the holder 16 is attached to the connector housing 1, and the rubber plug 19 is prevented from coming off while the electric wire seal portion 20 is compressed.

  When the assembling work of the holder 16 is completed in this way, the inner peripheral surface of the cylindrical portion 26 compresses the outer peripheral lip 27 of the rubber plug 19 inward to ensure the sealing performance, and the inner peripheral lip 23 is also sealed. It is pressed against the receiving surface 14 to ensure the sealing performance during this time.

  Next, the seal ring is fitted from the front of the connector housing 1 to reach the stepped portion with the rubber plug housing 5. Thereafter, the front member 10 is attached to prevent the seal ring from coming off. Subsequently, the retainer 8 is mounted to the connector housing 1 in a temporary locking position through the through hole 11 of the front member 10 and the retainer mounting hole 7 of the connector housing 1. In this temporarily locked state, the terminal fitting 2 is inserted into the cavity 3 through the corresponding through hole 30 and seal hole 21. When each terminal fitting 2 reaches the normal position in the cavity 3, the terminal fitting 2 is primarily locked by the lance 6, and after the insertion of all the terminal fittings 2 is completed, the retainer 8 can be moved to the full locking position. In this case, since the retainer 8 is secondarily locked to the rear end of the connecting portion 2A of each terminal fitting 2, each terminal fitting 2 is double-stopped by the lance 6 and the retainer 8.

  Thus, when the accommodating operation of each terminal fitting 2 is completed, the electric wires W are in close contact with the respective seal protrusions 22 of the corresponding seal holes 21 in a watertight state, so that the sealing performance is ensured during this time. By the way, when the electric wire W is inserted into each seal hole 21, the seal hole 21 is pushed and spread, so that the surrounding meat moves and the influence is transmitted to the adjacent seal hole 21. The influence of the movement of the meat gradually increases each time the electric wire W is inserted, and there is a concern about misalignment with the cavity 3 side. Although this has already been described, in the present embodiment, the outer peripheral surface of the wire seal portion 20 is separated from the inner peripheral surface of the rubber plug housing portion 5 and is not in a conventional contact state (restraint state). The movement of the meat can be released to the outer peripheral side of the wire seal part 20. Therefore, even if the insertion operation of the terminal fitting 2 is repeated, the positional deviation between the seal hole 21 and the cavity 3 can be alleviated as much as possible, so that the insertion operation of the terminal fitting 2 can be performed smoothly.

  As described above, according to the present embodiment, it is assumed that the rubber plug 19 in which the housing seal portion 13 and the wire seal portion 20 are arranged so as to be displaced in the front-rear direction is used, and the electric wire from the housing seal portion 13 to the electric wire is used. By forming the rib 28 extending in the front-rear direction over the seal portion 20 so as to protrude to the outer peripheral surface side, the upward deformation of the housing seal portion 13 can be mitigated. Therefore, the rubber plug 19 can be attached smoothly and the housing seal portion 13 is mounted in a normal state, which contributes to maintaining the sealing performance. The escape surface 24 formed at the front end of the housing seal portion 13 and the built-up portion 25 formed at the base portion of the housing seal portion 13 also contribute to avoiding the above-described squeeze-up.

  Further, since the clearance C is ensured between the outer peripheral surface of the wire seal portion 20 and the cylindrical portion 26 of the holder 16, the positional deviation between the seal hole 21 and the cavity 3 is alleviated, and the insertion work of the terminal fitting 2 is performed. It can be done smoothly.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above-described embodiment, the reinforcing rib 28 is formed with a length that reaches almost the rear end of the wire seal portion 20, but may be a length up to the middle of the wire seal portion 20.

(2) Although the front end of the rib 28 is connected to the outer peripheral lip 27 in the above embodiment, it may be separated by a slight distance.
(3) In the above embodiment, the cylindrical portion 26 is provided in the holder 16 so that the tip end side of the cylindrical portion 26 is in close contact with the outer peripheral lip 27. You may make it closely_contact | adhere to the inner peripheral surface of 5 in a watertight state.

DESCRIPTION OF SYMBOLS 1 ... Connector housing 2 ... Terminal metal fitting 3 ... Cavity 4 ... Terminal accommodating part 5 ... Rubber stopper accommodating part 13 ... Housing seal part 16 ... Holder 19 ... Rubber stopper 20 ... Electric wire sealing part 21 ... Seal hole 23 ... Inner peripheral lip 24 ... Relief surface 25 ... Build-up part 27 ... Outer peripheral lip 28 ... Rib W ... Electric wire C ... Clearance

Claims (5)

A connector housing comprising a terminal housing portion having a plurality of cavities, and a cylindrical rubber plug housing portion extending backward while covering the rear end portion of the terminal housing portion;
A plurality of terminal fittings connected to the end of the wire and housed in the cavity;
A rubber plug that is arranged corresponding to each cavity and has a plurality of seal holes through which the terminal fitting can be inserted and the electric wire is inserted in a watertight state, and is incorporated into the rubber plug housing portion,
A holder that is attached to the connector housing and abuts against the rear surface of the rubber plug to prevent the rubber plug from coming out backward;
The rubber plug is fitted to the outer peripheral surface of the block-shaped wire seal portion in which the seal hole is formed and the wires are inserted in a sealed state, and the rear end portion of the terminal accommodating portion from the wire seal portion toward the front. And a housing seal portion that protrudes in a cylindrical shape that can be mated and comes into contact with the outer peripheral surface of the terminal accommodating portion in a sealed state when the rubber stopper is accommodated in the rubber stopper accommodating portion,
A waterproof connector characterized in that a rib for restricting the housing seal portion from turning outward and deforming is formed on the outer peripheral surface side of the housing seal portion.   A sealing lip protrudes from the outer peripheral surface of the housing seal portion along the circumferential direction, while the rib is disposed along the front-rear direction and its front end is connected to the lip. The waterproof connector according to claim 1. The holder has a plurality of through-holes into which the terminal fittings can be loosely inserted and is accommodated in the rubber stopper accommodating portion, and extends in a cylindrical shape from the substrate portion to the front, and the inner portion of the rubber stopper accommodating portion. It consists of a cylindrical portion inserted between the wall surface and the outer peripheral surface of the rubber plug,
The inner peripheral surface of the cylindrical portion is in close contact with the lip in a watertight state in the mounted state of the holder, but a clearance is provided between the outer peripheral surface of the wire seal portion. The waterproof connector according to claim 1 or 2.   The relief surface for avoiding interference with the rear end surface of the terminal accommodating portion is formed in a tapered shape on the inner peripheral surface side of the front end portion of the housing seal portion. The waterproof connector according to claim 3.   The waterproof connector according to any one of claims 1 to 4, wherein a reinforcing build-up portion is formed on an inner surface side of a base portion of the housing seal portion.

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