JP2009259693A - Waterproof connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof connector having improved reliability on a waterproofing function. <P>SOLUTION: On a front end face 33 of a package rubber stopper 30 opposite to a corner end face 14 of a storage part 12, an elastic close contact part 34 is formed to encircle opening regions of a plurality of seal holes 31. On the corner end face 14 of the storage part 12, a seal face 15 is formed to encircle opening regions of a plurality of cavities 11 so that the elastic close contact part 34 has elastic contact therewith. Sealing is performed not only on the outer peripheral face of the package rubber stopper 30 but also on the front end face 33 of the package rubber stopper 30 and the corner end face 14 of the storage part 12. Consequently, the storage part 12 is avoided from being deformed to the outer face side by the elastic thrust of the package rubber stopper 30 from its outer periphery, thus preventing the lowering of sealing performance resulting from the deformation of the storage part 12 to the outer face side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a waterproof connector.

Patent Document 1 describes a waterproof connector using a batch rubber stopper. This connector has a housing having a plurality of cavities inside and a collective rubber plug attached to the rear end surface of the housing, and the collective rubber plug has a plurality of seal holes corresponding to each cavity penetrating in the front-rear direction. Is formed. In a state where the terminal fitting is accommodated in the cavity, the electric wire connected to the rear end of the terminal fitting penetrates the seal hole, and the inner periphery of the seal hole adheres in a liquid-tight manner to the outer periphery of the electric wire. In this way, it is possible to prevent water from entering the cavity through the seal hole. Further, a cylindrical housing portion extending rearward from the peripheral edge portion of the rear end surface is formed at the rear end portion of the housing, and a batch rubber plug is accommodated in the housing portion. A lip portion is formed on the outer periphery of the batch rubber plug, and this lip portion is in close contact with the inner wall surface of the housing portion, so that water can be immersed in the cavity along the outer surface of the batch rubber plug. It is prevented.
JP 2006-324161 A

When this type of waterproof connector is used in an environment where the temperature is high, such as in an engine room, the cylindrical housing portion formed in the housing made of synthetic resin may be softened. Further, when the thickness of the accommodating portion is reduced for downsizing, the rigidity of the accommodating portion is lowered. In such a case, the housing part is deformed to the outer surface side so as to escape from the collective rubber plug by the elastic pressing force from the lip part of the collective rubber plug, and as a result, the submerged water along the outer surface of the collective rubber plug. There is a concern that the sealing performance in the path may be lowered.
The present invention has been completed based on the above circumstances, and an object thereof is to improve the reliability of the waterproof function.

  As a means for achieving the above object, the invention of claim 1 is made of a synthetic resin in a form in which a plurality of cavities are formed inside and a cylindrical housing portion extending rearward is formed at a rear end portion. A plurality of seal holes are formed so as to penetrate the housing and corresponding to the plurality of cavities, and a lump rubber plug attached to the housing portion, and is inserted into the cavity from the rear through the seal holes. In a state where the terminal fitting is inserted into the cavity, an electric wire connected to the rear end of the terminal fitting passes through the seal hole, and an inner periphery of the seal hole is the In the connector that is in liquid-tight contact with the outer periphery of the electric wire, the front end surface of the collective rubber plug that faces the back end surface of the housing portion surrounds the opening regions of the plurality of seal holes. Form An elastic contact portion is formed, and the back end surface of the housing portion surrounds the opening areas of the plurality of cavities, and a seal surface is formed on which the elastic contact portion elastically contacts. Has characteristics.

  According to a second aspect of the present invention, in the first aspect, the elastic contact portion is formed in a form protruding from a front end surface of the collective rubber plug, and a part of a rear end surface of the accommodating portion is the sealing surface. The holder is characterized in that a holder for pressing the batch rubber stopper toward the back end surface of the holder is attached to the holder.

  According to a third aspect of the present invention, in the second aspect of the present invention, the rear end surface of the collective rubber plug surrounds a region where the plurality of seal holes are formed, and the front end surface of the holder It is characterized in that an auxiliary seal portion that can be elastically adhered is formed.

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the holder is held at a final locking position for applying a forward pressing force to the batch rubber stopper. And a temporary locking portion that holds the holder at a temporary locking position that does not apply a pressing force to the batch rubber plug.

  Invention of Claim 5 is the thing in any one of Claims 1 thru / or 4, The guide rib along the attachment direction of the lump rubber stopper to the storage part is formed in the inner wall of the storage part, A feature is that a guide groove that fits into the guide rib is formed on an outer periphery of the collective rubber plug.

  The invention of claim 6 is characterized in that, in the structure of claim 5, the guide rib and the guide groove are arranged so as to be interposed between the adjacent seal holes.

  According to a seventh aspect of the present invention, in the first aspect of the present invention, a seal wall having a form surrounding the opening regions of the plurality of cavities is formed on the inner end surface of the seal wall. And at least one of the outer peripheral surfaces serves as the sealing surface, and the front end surface of the batch rubber plug surrounds the opening regions of the plurality of sealing holes, and the sealing wall is fitted therein The seal groove is formed, and the elastic contact portion is formed on the inner surface of the seal groove so as to be in close contact with the seal surface.

  The invention of claim 8 is characterized in that, in the invention of claim 7, an auxiliary seal portion capable of elastically adhering to the inner wall surface of the housing portion is formed on the outer periphery of the collective rubber plug. Have

<Invention of Claim 1>
Since the sealing is performed on the front end face of the batch rubber plug and the back end face of the housing part, not on the outer peripheral surface of the batch rubber stopper, the housing part is deformed to the outer surface side by the elastic pressing force from the outer periphery of the batch rubber stopper. Can be avoided. Therefore, there is no possibility that the sealing performance is deteriorated due to the deformation of the housing portion toward the outer surface side.

<Invention of Claim 2>
Due to the pressing force of the holder, the elastic contact portion is securely brought into close contact with the sealing surface, so that the reliability of the sealing performance is high.

<Invention of Claim 3>
When the auxiliary seal portion is in close contact with the front end surface of the holder, it is possible to prevent water from entering the seal hole from the gap between the batch rubber stopper and the holder.

<Invention of Claim 4>
When inserting the terminal fitting into the housing, if the holder is held in the temporary locking position, no pressing force is applied to the batch rubber stopper, so the seal hole is deformed to expand when the terminal fitting is inserted. It becomes easy and insertion resistance can be reduced. Further, after the terminal fitting is inserted, if the holder is pushed into the full locking position as it is and a pressing force is applied to the collective rubber plug, a sealed state is obtained.

<Invention of Claim 5>
The fitting of the guide rib and the guide groove prevents the posture of the collective rubber plug from being illegally inclined with respect to the accommodating portion. Thereby, contact | adherence with an elastic contact | adherence part and a sealing surface becomes uniform over the perimeter, and high sealing performance is exhibited.

<Invention of Claim 6>
Since the guide ribs are disposed so as to be interposed between adjacent seal holes, it is possible to prevent the collective rubber plug from being elastically deformed so as to displace the position of the seal hole. Thereby, the position shift of the seal hole with respect to the cavity can be prevented.

<Invention of Claim 7>
Since the movement of the collective rubber plug is regulated by the seal wall, there is no possibility that an excessive pressing force is applied to the inner wall surface of the housing portion due to the positional shift of the collective rubber plug.

<Invention of Claim 8>
Since the elastic contact portion and the auxiliary seal portion exist in the path that reaches the inside of the cavity through the inner surface of the housing portion, it is possible to reliably prevent water from entering along the path.

<Embodiment 1>
A first embodiment embodying the present invention will be described below with reference to FIGS. The waterproof connector A of the present embodiment includes a single housing 10, a plurality of terminal fittings 20, a single rubber plug 30, and a single holder 40.
The housing 10 is made of synthetic resin, and a plurality of cavities 11 penetrating in the front-rear direction are formed in the housing 10 so as to be aligned vertically and horizontally. A housing portion 12 is formed at the rear end portion (right end portion in FIGS. 1 and 2) of the housing 10 so as to extend rearward from the outer peripheral edge of the rear end surface into a rectangular tube shape (wall shape). The accommodation space 13 is formed. The rear end of the cavity 11 is opened at the back end surface 14 (the rear end surface of the housing 10) of the housing space 13.

  The back end surface 14 of the housing space 13 is a flat surface orthogonal to the front-rear direction (the through direction of the terminal fitting 20 and the electric wire 23 with respect to a seal hole 31 described later), and surrounds the openings of all the cavities 11 in the back end surface 14. A square area along the entire circumference of the inner wall of the accommodating portion 12 is a sealing surface 15. Further, a concave temporary locking portion 16 and a concave main locking portion 17 located deeper (front) than the temporary locking portion 16 are respectively provided in the inner wall of the housing portion 12 in the circumferential direction. A plurality of pieces are formed at intervals.

  Further, three pairs of guide ribs 18 are formed on the inner wall of the accommodation space 13. The guide ribs 18 are arranged at intervals in the circumferential direction from the long side wall surface of the inner wall of the housing space 13 and protrude in a wall shape substantially perpendicular to the inner wall surface. It is formed continuously from the rear end (open end) to the back end face 14.

  The terminal fitting 20 is elongated in the front-rear direction, and the substantially first half portion is a rectangular tube-like connection portion 21 connected to a mating terminal (not shown), and the substantially second half portion is an open barrel-shaped wire crimping portion 22. It has become. A front end portion of the electric wire 23 is connected to the electric wire crimping portion 22 so as to be conductive by crimping, and the crimped electric wire 23 extends rearward so as to be substantially straight with the terminal fitting 20.

  The collective rubber plug 30 has a block shape and is accommodated in the back space of the accommodation space 13. The outer peripheral surface of the collective rubber plug 30 is in a state of lightly contacting the inner wall surface of the accommodation space 13 in a surface contact manner or facing the inner space with a slight clearance. The backlash of the stopper 30 in the vertical and horizontal directions is restricted. The elastic pressing force resulting from the elastic restoring force of the collective rubber plug 30 does not act strongly from the outer peripheral surface of the collective rubber plug 30 to the inner wall surface of the accommodation space 13.

  A plurality of circular seal holes 31 are formed in the collective rubber plug 30 so as to correspond to the cavities 11 so as to penetrate in the front-rear direction. A plurality of lip portions 32 arranged in the front-rear direction are concentrically formed on the inner periphery of each seal hole 31, and the minimum of the lip portion 32 (seal hole 31) in a free state in which the seal hole 31 is not elastically deformed. The inner diameter dimension is smaller than the outer diameter dimension of the electric wire 23.

  Three pairs of guide grooves 35 are formed on the outer periphery of the collective rubber plug 30. The guide groove 35 has a shape in which three portions of the flat region on the long side of the outer periphery of the batch rubber stopper 30 are cut out in a slit shape so as to be substantially perpendicular to the outer peripheral surface with a space between each other. The plug 30 is formed from the front end surface 33 to the rear end surface. The guide groove 35 is interposed between the adjacent seal holes 31. Specifically, one seal hole 31 is disposed in the direction along the long side between the two pairs of guide grooves 35 located on both sides and the inner wall surface on the short side of the housing portion 12. Between the two pairs of guide grooves 35 and the pair of guide grooves 35 located at the center, two seal holes 31 are arranged side by side in the direction along the long side.

  The front end surface 33 of the collective rubber plug 30 is parallel to the flat surface perpendicular to the penetrating direction (front-rear direction) of the terminal fitting 20 and the electric wire 23 with respect to the seal hole 31, that is, the rear end surface 14 of the accommodation space 13. On the front end surface 33 of the collective rubber plug 30, there is an elastic contact portion 34 in the form of a rib protruding forward along the peripheral edge of the collective rubber plug 30 so as to surround the opening regions of the plurality of seal holes 31. , Continuously formed over the entire circumference. The collective rubber plug 30 is attached in a state where the elastic contact portion 34 is elastically adhered to the back end surface 14 of the accommodation space 13.

  Further, the rear end surface of the collective rubber plug 30 is a flat surface parallel to the front end surface 33, and the rear end surface surrounds the opening regions of the plurality of seal holes 31 like the elastic contact portion 34. The auxiliary seal portion 36 is formed so as to protrude rearward along the peripheral edge portion of the collective rubber plug 30 in a rib shape.

  The holder 40 is made of a synthetic resin, has a plate shape with a relatively large thickness in the front-rear direction, and is fitted to the rear end region in the accommodation space 13 without backlash. A plurality of locking projections 41 are formed on the outer periphery of the holder 40 at intervals in the circumferential direction. As shown in FIG. 40 is held in the temporary locking position, and as shown in FIG. 2, the holder 40 is held in the final locking position by locking the locking protrusion 41 to the main locking portion 17. ing.

  A plurality of through holes 42 corresponding to the respective seal holes 31 are formed in the holder 40 so as to penetrate in the front-rear direction. Further, the front end surface of the holder 40 is a flat surface parallel to the rear end surface of the batch rubber plug 30, and a substantially rectangular region surrounding the opening region of the plurality of through holes 42 on the front end surface of the holder 40 is an auxiliary surface. A seal surface 43 is formed. Further, three pairs of fitting grooves 44 are formed on the outer periphery of the holder 40. The fitting groove 44 has a shape in which flat regions on the long side in the outer periphery of the holder 40 are notched in a slit shape so as to form a substantially right angle with respect to the outer peripheral surface. To the rear end face.

Next, the operation of this embodiment will be described.
When assembling the waterproof connector A of the present embodiment, first, the collective rubber plug 30 is assembled into the housing space 13 from the rear. At this time, by fitting the guide groove 35 to the guide rib 18, the collective rubber plug 30 is positioned with respect to the housing 10 in the vertical and horizontal directions, and is restricted from being inclined with respect to the housing 10. It can be installed smoothly without twisting. When the collective rubber plugs 30 are assembled, the opening on the front surface side of each seal hole 31 is aligned concentrically with the opening on the rear surface side of each corresponding cavity 11.

  Next, the holder 40 is assembled into the accommodation space 13 from the rear. At this time, by fitting the fitting groove 44 to the guide rib 18, the holder 40 is positioned with respect to the housing 10 in the vertical and horizontal directions, and is restricted from being inclined with respect to the housing 10. Can be installed smoothly. Then, the holder 40 is held at the temporary locking position by locking the locking projection 41 to the temporary locking portion 16. In this state, no pressing force acts on the rear end surface of the batch rubber plug 30 from the holder 40. Therefore, the collective rubber plug 30 is in a free state in which it does not elastically bend, the inner peripheral portion of the seal hole 31 is not elastically deformed, and the inner diameter of the seal hole 31 is the largest.

  Thereafter, the terminal fitting 20 is attached to the housing 10 from the rear while the holder 40 is held at the temporary locking position. At the time of attachment, the terminal fitting 20 is inserted into the through hole 42 of the holder 40 and is inserted into the cavity 11 through the seal hole 31. The terminal fitting 20 inserted to the normal position in the cavity 11 is brought into a retaining state by the locking action of the lance 19 in the cavity 11. When the terminal fitting 20 is properly inserted, the electric wire 23 passes through the seal hole 31, and the inner peripheral lip portion 32 of the seal hole 31 is elastically adhered to the outer periphery of the electric wire 23.

  When the insertion of all the terminal fittings 20 is completed, the holder 40 is pushed forward and moved to the final locking position. When the holder 40 moves to the final locking position, the front surface of the holder 40 presses the collective rubber plug 30 forward, and the collective rubber plug 30 is moved in the front-rear direction between the front surface of the holder 40 and the back end surface 14 of the accommodation space 13. It is elastically deformed so as to be slightly crushed. Accordingly, the elastic contact portion 34 of the collective rubber plug 30 is elastically adhered to the seal surface 15 of the back end surface 14 of the accommodation space 13 and is sealed in a liquid-tight manner at this contact portion. Further, the auxiliary seal portion 36 of the collective rubber plug 30 is elastically in close contact with the auxiliary seal surface 43 on the front surface of the holder 40 and is sealed in a liquid-tight manner at this close contact portion.

  Further, since the collective rubber plug 30 is crushed in the front-rear direction, the inner peripheral portion of the seal hole 31 is also elastically deformed so as to reduce the diameter. Thereby, the elastic pressing force of the lip | rip part 32 with respect to the electric wire 23 increases, and a sealing performance improves.

  Incidentally, there is a concern that when the collective rubber plug 30 is crushed in the front-rear direction, the outer periphery of the collective rubber plug 30 is also elastically deformed so as to approach the inner wall surface of the accommodation space 13. However, with respect to the direction along the long side of the collective rubber plug 30, the presence of the guide rib 18 prevents the collective rubber plug 30 from spreading greatly in the long side direction. An elastic pressing force does not act strongly on the inner wall surface of the accommodation space 13 from the outer surface. Further, also in the direction along the short side of the collective rubber plug 30, the collective rubber plug 30 is moved in the short side direction by the back end of the guide groove 35 of the collective rubber plug 30 coming into contact with the extending edge of the guide rib 18. There is no possibility of spreading greatly, and an elastic pressing force does not act strongly on the inner wall surface of the accommodating space 13 from the outer surface on the long side of the batch rubber plug 30.

  The liquid that has entered through the gap between the inner wall surface of the storage space 13 and the outer surface of the holder 40 enters the opening on the rear surface side of the seal hole 31 by the waterproof function of the auxiliary seal portion 36 and the auxiliary seal surface 43. Be blocked. Further, the liquid that has reached the far end through the inner wall surface of the accommodation space 13 is prevented from entering the opening on the rear surface side of the cavity 11 by the waterproof function due to the elastic contact between the elastic contact portion 34 and the seal surface 15. The Further, the liquid that has reached the rear end face of the batch rubber plug 30 from the through hole 42 of the holder 40 is prevented from passing through the seal hole 31 by the waterproof function of the lip portion 32 of the seal hole 31. As described above, the infiltration of the liquid into the cavity 11 from the rear is surely prevented.

  As described above, in the present embodiment, the seal in the path along the inner wall surface of the housing space 13 is not on the outer peripheral surface of the batch rubber plug 30 but on the front end surface 33 of the batch rubber plug 30 and the back end surface 14 of the storage portion 12. Since the elastic close contact structure is used, it is possible to avoid the pressing force from acting on the inner wall surface of the accommodating portion 12 from the outer periphery of the batch rubber plug 30. Thereby, there is no possibility that the accommodating part 12 will be deformed to the outer surface side by the elastic pressing force from the collective rubber plug 30, and there is no possibility that the sealing performance will be deteriorated due to the deformation of the accommodating part 12 to the outer surface side. .

Further, the guide rib 18 is formed on the inner wall of the housing portion 12 along the mounting direction of the collective rubber plug 30 with respect to the housing portion 12, and the guide groove 35 that fits the guide rib 18 is formed on the outer periphery of the collective rubber plug 30. The fitting of the guide rib 18 and the guide groove 35 prevents the posture of the collective rubber plug 30 from being illegally inclined with respect to the housing portion 12. Thereby, the contact | adherence with the elastic contact | adherence part 34 and the sealing surface 15 becomes uniform over the perimeter, and high sealing performance is exhibited.
Further, since the guide rib 18 and the guide groove 35 are disposed so as to be interposed between the adjacent seal holes 31, it is possible to prevent the collective rubber plug 30 from being elastically deformed so as to displace the position of the seal hole 31. . Thereby, the position shift of the seal hole 31 with respect to the cavity 11 can be prevented.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. The waterproof connector B of the second embodiment has a structure different from that of the first embodiment in the seal structure provided on the front end surface 33 of the collective rubber plug 60 and the back end surface 14 of the housing portion 12. Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals, and descriptions of structures, operations, and effects are omitted.

  The housing 50 has the same accommodating portion 12 and accommodating space 13 as in the first embodiment. A seal wall 51 is formed on the back end surface 14 of the accommodation space 13. The seal wall 51 has a substantially square cylindrical shape surrounding the open areas of the plurality of cavities 11, is continuous over the entire circumference, and protrudes rearward. The projecting dimension of the seal wall 51 is smaller than the depth dimension of the accommodation space 13 and smaller than the thickness dimension (dimension in the front-rear direction) of the collective rubber plug 60. The inner peripheral surface and the outer peripheral surface of the seal wall 51 are both sealing surfaces 52. The inner wall surface of the accommodation space 13 is an auxiliary seal surface 53.

  The collective rubber plug 60 has a plurality of seal holes 31 as in the first embodiment. The collective rubber plug 60 is formed with a seal groove 61 having a shape in which a substantially rectangular region surrounding the opening region of the plurality of seal holes 31 on the front end surface 33 is cut out. The seal groove 61 is continuous over the entire circumference, and an elastic contact portion in a form that is continuous in the circumferential direction and protrudes in a rib shape on the inner peripheral surface on the outer side and the inner peripheral surface on the inner side, respectively. 62 is formed. In addition, an auxiliary seal portion 63 that protrudes in a lip shape continuously in the circumferential direction is formed on the outer periphery of the collective rubber plug 60.

  When the collective rubber plug 60 is assembled in the housing space 13, the seal groove 61 is fitted into the seal wall 51, and the elastic contact portion 62 on the inner peripheral side and the elastic contact portion 62 on the outer peripheral side respectively correspond to the corresponding seal surfaces. 52 is elastically adhered to 52. Further, the auxiliary seal portion 63 on the outer periphery of the collective rubber plug 60 is elastically adhered to the auxiliary seal surface 53 of the accommodation space 13.

  In the second embodiment, the liquid that has entered through the path along the inner wall surface of the accommodation space 13 is prevented from entering the interior of the accommodation space 13 by the waterproof function of the auxiliary seal portion 63 and the auxiliary seal surface 53. In addition, even if the liquid that has passed through the close contact portion between the auxiliary seal portion 63 and the auxiliary seal surface 53 reaches the back end surface 14 of the accommodation space 13, the waterproof function by the close contact between the elastic close contact portion 62 and the seal surface 52 Since further penetration is prevented, the opening of the cavity 11 is not reached.

  Particularly, the outer peripheral surface of the seal wall 51 with respect to the rear end surface 14 of the storage space 13 is in the middle of a creeping path from the outer peripheral side region to the inner peripheral side region of the rear end surface 14 of the storage space 13. Are bent at a right angle, a folded path is formed by folding the inner peripheral surface of the sealing wall 51 with respect to the outer peripheral surface of the seal wall 51, and the back end surface 14 of the accommodating space 13 is formed with respect to the inner peripheral surface of the seal wall 51. There is a bending path that is formed by linking at right angles. Such a complicated path makes it difficult for the liquid to move, and thus contributes to an improvement in sealing performance.

  Further, even if the collective rubber plug 60 is moved in the vertical and horizontal directions along the back end surface 14 of the accommodation space 13, the movement is restricted by the seal wall 51, and therefore, the collective rubber plug 60 is moved. Thus, there is no possibility that an elastic pressing force acts excessively on the inner wall surface of the accommodation space 13 from the outer periphery of the collective rubber plug 60.

<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) Although the case where the terminal fitting is a female terminal fitting having no tab has been described in the above embodiment, the present invention can also be applied to a male terminal fitting having a tab at the front end.
(2) In Embodiment 1 above, the auxiliary seal portion is formed on the rear end surface of the collective rubber plug. However, according to the present invention, the auxiliary seal portion may not be formed on the rear end surface of the collective rubber plug.
(3) In Embodiment 1 described above, the holder is held at the temporary locking position where no pressing force is applied to the batch rubber stopper. However, according to the present invention, the holder is attached at one location relative to the housing portion. However, the holder may be configured to press the collective rubber stopper forward in a state where the holder is attached to the attachment position.
(4) In the first embodiment, three pairs of guide ribs and guide grooves are provided. However, according to the present invention, the number of guide ribs and guide grooves may be less than three pairs or more than three pairs.
(5) In the first embodiment, the guide rib and the guide groove are formed. However, according to the present invention, the guide rib and the guide groove may not be formed.
(6) In Embodiment 2 described above, both the inner peripheral surface and the outer peripheral surface of the seal wall are made to function as the seal surface. However, according to the present invention, either one of the inner peripheral surface and the outer peripheral surface of the seal wall is used. Only the surface may function as a sealing surface.
(7) In the second embodiment, the auxiliary seal portion is formed on the outer periphery of the collective rubber plug. However, according to the present invention, the auxiliary seal portion may not be formed on the outer periphery of the collective rubber plug.

Sectional drawing showing the state in which the sealing function by the lump rubber stopper is not demonstrated in Embodiment 1 Sectional view showing a state where the lump rubber stopper is pressed by the holder and the sealing function is exerted Rear view showing a state where a batch rubber stopper and holder are attached to the housing Front view of batch rubber stopper Rear view of holder Partial enlarged sectional view of Embodiment 2 Front view of batch rubber stopper of embodiment 2

Explanation of symbols

A ... Waterproof connector 10 ... Housing 11 ... Cavity 12 ... Housing part 14 ... Back end surface of housing part 15 ... Sealing surface 16 ... Temporary locking part 17 ... Main locking part 18 ... Guide rib 20 ... Terminal metal fitting 23 ... Electric wire 30 ... Collective Rubber plug 31 ... Seal hole 33 ... Front end surface of batch rubber plug 34 ... Elastic contact portion 35 ... Guide groove 36 ... Auxiliary seal portion 40 ... Holder B ... Waterproof connector 50 ... Housing 51 ... Seal wall 52 ... Seal surface 60 ... Batch rubber Plug 61 ... Seal groove 62 ... Elastic adhesion part 63 ... Auxiliary seal part

Claims (8)

A plurality of cavities are formed inside, a housing made of synthetic resin in a form in which a cylindrical housing portion extending rearward is formed at the rear end portion, and
A plurality of seal holes are formed so as to penetrate corresponding to the plurality of cavities, and a collective rubber plug attached in the housing portion;
A plurality of terminal fittings inserted into the cavity through the seal hole from the rear,
In a state where the terminal fitting is inserted into the cavity, the electric wire connected to the rear end of the terminal fitting penetrates the seal hole, and the inner periphery of the seal hole is liquid-tight with respect to the outer periphery of the electric wire. In a connector that comes in close contact,
On the front end surface facing the back end surface of the housing portion in the batch rubber stopper, an elastic contact portion in a form surrounding the opening regions of the plurality of seal holes is formed,
A waterproof connector characterized in that a seal surface is formed on the back end surface of the housing portion so as to surround the opening regions of the plurality of cavities, and the elastic contact portion is elastically adhered. The elastic contact portion is formed in a form protruding from the front end surface of the batch rubber stopper,
A part of the back end surface of the accommodating portion is the sealing surface,
The waterproof connector according to claim 1, wherein a holder for pressing the collective rubber plug toward the back end surface of the housing portion is attached to the housing portion.   The rear end surface of the collective rubber plug is formed to surround the formation region of the plurality of seal holes, and an auxiliary seal portion that can be elastically adhered to the front end surface of the holder is formed. The waterproof connector according to claim 2.   The housing portion includes a main locking portion that holds the holder at a main locking position that applies a forward pressing force to the batch rubber plug, and a pressing force that holds the holder against the batch rubber plug. The waterproof connector according to claim 2, wherein a temporary locking portion that is held at a temporary locking position that is not provided is formed. On the inner wall of the housing portion, a guide rib is formed along the mounting direction of the collective rubber plug with respect to the housing portion,
The waterproof connector according to any one of claims 1 to 4, wherein a guide groove that fits into the guide rib is formed on an outer periphery of the collective rubber plug.   The waterproof connector according to claim 5, wherein the guide rib and the guide groove are disposed so as to be interposed between the seal holes adjacent to each other. A seal wall in a form surrounding the opening regions of the plurality of cavities is formed on the back end surface of the housing portion,
At least one of the inner peripheral surface and the outer peripheral surface of the seal wall is the seal surface,
The front end surface of the collective rubber plug has a form surrounding the opening regions of the plurality of seal holes, and a seal groove into which the seal wall is inserted is formed.
The waterproof connector according to claim 1, wherein the elastic contact portion is formed on an inner surface of the seal groove so as to be in close contact with the seal surface.   The waterproof connector according to claim 7, wherein an auxiliary seal portion that can be elastically adhered to an inner wall surface of the housing portion is formed on an outer periphery of the collective rubber plug.

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