JP2008052971A - Watertight connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a watertight connector in which the watertight function can be secured and a terminal can be retained surely against vibrations or the like. <P>SOLUTION: This is the watertight connector 10, in which a sealing member 50 is adhered to a holder 40, a first watertight part 51 and a second watertight part 52 are installed at this sealing member 50, a seal side insertion hole 51b into which a male terminal retaining part 32 that retains the male terminal 3 can be inserted is formed in this first watertight part 51, while the circumference of the male terminal retaining part 32 is sealed by pressing this seal side insertion hole 51b toward the diameter direction with the outer peripheral part of the male terminal retaining part 32. A gap between a female housing 21 and the holder 40 is tightly sealed by pressing the inner peripheral part of the second watertight part 52 toward the diameter direction with the outer peripheral part of the female housing 21. Then, a plurality of double locking parts which suppress that the female terminal locking part 23 installed at the female housing 21 is elastically displaced from a locking position where a female terminal 2 is locked at an unlocking position are installed at the holder 40 so as to penetrate through the first watertight part 51. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a waterproof connector having a waterproof function.

  Conventionally, various so-called waterproof connectors having a waterproof function have been developed as connectors applied to automobile wire harnesses and the like.

  For example, in Patent Document 1, as shown in FIG. 6, a female connector 120, a male connector 130, a holder 140 surrounding a front end portion of the female connector 120, an elastic member, and the holder 140 and the female connector 120. A waterproof connector 100 having a seal member 150 provided between the two is disclosed.

  The female connector 120 includes a female terminal 2 to which the electric wire 1 is connected, and a female housing 121 that holds the female terminal 2. The female housing 121 includes a plurality of female terminal accommodating chambers into which the female terminals 2 are inserted. 122, a plurality of female terminal locking portions 123 for locking the female terminal 2, and a locking hole 124 for locking the male housing 131. The male connector 130 includes a male terminal 3 connected to an unillustrated electric wire, and a male housing 131 that holds the male terminal 3. The male housing 131 protrudes toward the female connector 120 to project a plurality of male connectors. A plurality of male terminal holding portions 132 for holding the terminals 3 respectively, and a locked protrusion 134 that engages with the locking hole 124 are provided.

  The holder 140 includes a pressing portion 141 that presses the seal member 150 in the axial direction against the front end surface of the female housing 121 where the female terminal accommodating chamber 122 opens, and the female housing 121 extends rearward from the pressing portion 141. And a side wall 143 having a shape surrounding the front end portion. The pressing portion 141 is provided with a plurality of holder side insertion holes 141b through which the plurality of male terminal holding portions 132 can be inserted. Further, the seal member 150 is provided with a seal side insertion hole 150b through which the plurality of male terminal holding portions 132 can be inserted at a position corresponding to the holder side insertion hole 141b.

  In the conventional waterproof connector 100 as described above, the seal member 150 is mounted on the female housing 121, the holder 140 is mounted so as to cover the seal member 150, and then the seal member 150 and the holder 140 are pressed toward the female connector side. However, the locked protrusion 134 of the male housing 131 and the locking hole 124 of the female housing 121 are engaged, and the male connector 130 and the female connector 120 are fitted in the axial direction.

Here, when the sealing member 150 is pressed in the axial direction by the pressing portion 141 of the holder 140 when the locked protrusion 134 and the locking hole 124 are engaged, the front end surface of the female housing 121 and the holder 140 are fixed. It is elastically deformed with the pressing part 141. The seal member 150 is in close contact with the front end surface of the female housing 121, and the inner peripheral surface of the seal-side insertion hole 150 b of the seal member 150 is in close contact with the outer peripheral portion of the male terminal holding portion 132. Water immersion from the outer peripheral portion and water immersion from the male terminal holding portion 132 are suppressed.
JP 2003-123895 A

  In the waterproof connector 100, the seal member 150 is pressed in the axial direction by the pressing portion 141 of the holder 140, and the seal member 150 is elastically deformed in the axial direction to suppress water immersion. Therefore, when the waterproof connector 100 is used under a situation where vibration or the like is applied in the axial direction, the front end surface of the female housing 121 and the pressing portion 141 of the holder 140 are relatively displaced in the axial direction due to the vibration or the like. As a result, the axial pressing force against the seal member 150 may not be maintained, and a waterproof function may not be sufficiently secured. For example, when the waterproof connector 100 is mounted on an automobile or the like, depending on the mounting position or the like, the electric wire may be pulled due to an impact or the like during traveling, and thus may receive vibration in the axial direction. In such a case, the female housing 121 and the holder 140 may be relatively displaced as described above, and the pressing force may not be sufficiently maintained.

  In particular, in the waterproof connector 100, the locked protrusion 134 of the male housing 131 and the locking hole 124 of the female housing 121 are engaged in the axial direction, and the locked protrusion 134 and the locking hole 124 are engaged with each other. Is provided with a clearance in the axial direction. Therefore, when vibration is applied to the waterproof connector 100, the female connector 120, the male connector 130, and thus the holder 140 and the female housing 121 may be relatively displaced in the axial direction with a swing width corresponding to this clearance.

  Furthermore, as described above, when the electric wire is pulled due to an impact during traveling, etc., the terminal connected to the electric wire may be displaced. Must be avoided.

  In view of such circumstances, an object of the present invention is to provide a waterproof connector that can secure a sufficient waterproof function against axial vibrations and the like and can reliably hold a terminal.

  As means for solving the above problems, the present invention provides a female connector including a plurality of female terminals to which electric wires are connected and a female housing for holding the plurality of female terminals, a plurality of male terminals to which electric wires are connected, and A male connector having a male housing for holding the plurality of male terminals, a holder locked to the female housing so as to surround a front end portion of the female connector, and a seal member bonded to the holder, The female housing includes a plurality of female terminal receiving chambers into which the plurality of female terminals are inserted from the rear, and a plurality of female terminal locking portions for locking the female terminals inserted into the plurality of terminal receiving chambers, respectively. A holder locking portion for locking the holder, wherein the female terminal locking portion is a locking position where the female terminal can be locked, and the female terminal is retracted from the locking position. The male housing has a shape that can be elastically displaced with respect to an unlocking position for releasing the locking state of the child, and the male housing holds each of the plurality of male terminals so as to protrude toward the female connector. A holder base that covers the front end surface of the female connector; and a front end of the female connector that extends from the outer peripheral portion of the holder base toward the female connector and extends to the inner peripheral portion of the holder base. And the holder base is inserted into the plurality of holder side insertion holes through which the plurality of male terminal holding portions can be inserted, and the plurality of female terminal receiving chambers, respectively, and the female terminals A plurality of double locking portions that suppress elastic displacement of the locking portion from the locking position to the unlocking position, and the side wall of the holder is engaged with the holder locking portion at an outer peripheral portion thereof. Holder to match A first portion having a plurality of seal side insertion holes that cover the front end surface of the female connector and that can be inserted into the male terminal holding portion at a position corresponding to the holder side insertion hole. The first waterproof portion has a waterproof portion and a second waterproof portion extending from the outer peripheral portion of the first waterproof portion toward the female connector, and the front end surface of the first waterproof portion is bonded to the rear end surface of the holder base. When the female connector and the male connector are fitted, the inner peripheral surface of the seal-side insertion hole is pressed in the radial direction by the outer peripheral portion of the male terminal holding portion, thereby closely contacting the outer peripheral portion of the male terminal holding portion. The second waterproof portion has a shape that seals the periphery of the male terminal holding portion, and the outer peripheral portion of the second waterproof portion is bonded to the inner peripheral surface of the side wall of the holder, and the holder locking portion When engaging the holder locked part, The portion is pressed in the radial direction by the outer peripheral portion of the female housing so as to be in close contact with the outer peripheral portion of the female housing, and has a shape that seals the gap between the holder and the female housing over the entire circumference, The double locking portion provides a waterproof connector characterized in that the double waterproof portion protrudes through the second waterproof portion from the base portion of the holder and protrudes toward the female connector, and the protruding end portion is inserted into the female terminal accommodating chamber. (Claim 1).

  According to such a configuration, since the gap between the holder and the female housing is sealed by the second waterproof portion of the seal member, it is possible to prevent water from entering the female terminal accommodating chamber side from this gap. . Moreover, since the circumference | surroundings of a male terminal holding part are sealed by said 1st waterproof part, it can suppress that water permeates into the female terminal storage chamber side from the circumference | surroundings of this male terminal holding part. In particular, the second waterproof part is configured to be in close contact with the outer peripheral part of the female housing by being pressed in the radial direction by the outer peripheral part of the female housing. Since the inner peripheral surface of the side insertion hole is pressed in the radial direction by the outer peripheral portion of the male terminal holding portion, the inner peripheral surface of this seal side insertion hole is configured to be in close contact with the outer peripheral portion of the female housing. Even when the waterproof connector vibrates and the connector or holder is relatively displaced in the axial direction, the tight contact position is shifted in the axial direction, so that the clearance between the female housing and the holder and the sealed state around the male terminal holder are Maintained. That is, according to this configuration, it is possible to reliably maintain a state in which water ingress is suppressed regardless of the vibration of the waterproof connector.

  In addition, according to this configuration, since the double locking portion that suppresses the elastic displacement of the female terminal locking portion from the locking position to the locking release position is provided, even if the electric wire is pulled Elastic displacement of the female terminal locking portion to the unlocking position is suppressed. Therefore, the position shift of the female terminal can be more reliably suppressed. That is, the present invention has a structure in which the double locking portion protrudes from the base portion of the holder so as to penetrate the second waterproof portion, so that the first waterproof portion and the first waterproof portion can be formed without increasing the size of the waterproof connector. While ensuring the waterproof function by the two waterproof portions, it is possible to suppress the terminal displacement due to the double locking portion.

  In the present invention, it is preferable that the seal member is formed integrally with the holder, and the first waterproof portion is formed in a region excluding the seal side insertion hole and the double locking portion (Claim 2).

  According to such a structure, when inserting a female housing in the 1st waterproof part of a seal member, and inserting a male terminal holding part in a 2nd waterproof part, it suppresses more reliably that a seal member slip | deviates. In addition, the assembly of the holder to the female housing can be facilitated. In addition, regardless of the presence of the double locking portion, the first waterproof portion can be properly disposed at the intricate portion on the back side of the holder base. As described above, “adhesion” means that the holder and the seal member are bonded as a result of being integrally formed regardless of whether the holder and the seal member are formed as separate members in advance. It is a concept including what is.

  Moreover, in this invention, it is preferable that the inner peripheral part of the 2nd waterproof part of the said sealing member is provided with the convex part for contact | adherence which protrudes radially inner side and can be closely_contact | adhered to the outer peripheral part of the said female housing from radial direction outer side ( Claim 3).

  According to such a structure, the clearance gap between the inner peripheral part of a 2nd waterproof part and the outer peripheral part of a female housing can be sealed more reliably.

  Also, in the present invention, the female housing is located in front of the position where the female terminal is locked to the female terminal locking portion and the female terminal locking portion is restrained from elastic displacement by the double locking portion. It is preferable to have a holder temporary locking portion for temporarily locking the holder at the position (Claim 4).

  According to such a structure, the insertion operation of the female terminal before a double latching part suppresses the elastic displacement of a female terminal latching part can be performed efficiently.

  As described above, according to the present invention, it is possible to provide a waterproof connector that can ensure a waterproof function and can reliably suppress the displacement of terminals even when vibration is applied in the axial direction.

  Hereinafter, embodiments of a waterproof connector according to the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of a waterproof connector 10 according to this embodiment. The waterproof connector 10 includes a female connector 20, a male connector 30, a holder 40, and a seal member 50. As shown in FIG. 1, the female connector 20 has a female terminal 2 to which the electric wire 1 is connected and a female housing 21 made of resin or the like. The male connector 30 has a male terminal 3 to which an unillustrated electric wire is connected and a male housing 31 made of resin or the like. 2 is an exploded cross-sectional view of the female housing 21 and the holder 40, FIG. 3 is a cross-sectional view of the female housing 21 and the female terminal 2 to which the holder 40 is mounted, and FIG. FIG. 5 is an exploded cross-sectional view of the female connector 20 and the male connector 30. FIG. 5 is a rear view of the holder 40 formed integrally with the seal member 50 as viewed from the female connector 20 side.

  As shown in FIGS. 1 and 2, the female housing 21 includes a plurality of female terminal accommodating chambers 22 into which the female terminals 2 can be inserted from the rear, and the female terminals 2 inserted into these female terminal accommodating chambers 22 respectively. It has the several female terminal latching | locking part 23 to latch. The female terminal locking portion 23 is provided on the upper surface of the inner peripheral wall of the female terminal accommodating chamber 22 and has a shape that swells obliquely downward from the upper side surface of the inner peripheral wall toward the front end side. . Because of this shape, the front end portion of the female terminal locking portion 23 can be elastically displaced upward, and the female terminal 2 is pushed into the female terminal receiving chamber 22 while pushing the female terminal locking portion 23 upward at the front end portion. Inserted. The engaged portion 2b provided on the upper surface of the female terminal 2 engages with the front end portion of the female terminal engaging portion 23, whereby the female terminal 2 is engaged with the female terminal engaging portion 23. .

  The female terminal accommodating chamber 22 is opened at the front end surface of the female housing 21, and the male terminal 3 can be inserted through the opening. The upper part of the outer peripheral surface of the female housing 21 is engaged with an upper main locking projection 25a (holder locking portion) for locking the holder 40 and a locking projection 34 provided on the male housing 31 described later. A locking arm 26 for locking the fitting between the terminal 2 and the male terminal 3 is provided. Further, a temporary locking projection 25b (holder temporary locking portion) for locking the holder 40 and a lower main locking projection 25c (holder locking portion) in the axial direction are provided at the lower outer peripheral surface of the female housing 21. It is provided so as to be lined up front and back. The upper main locking projection 25a, the temporary locking projection 25b, and the lower main locking projection 25c protrude outward, and the locking arm 26 has a shape that can be elastically displaced in the vertical direction. .

  As shown in FIG. 3, the temporary locking projection 25 b is for temporarily locking the holder 40 to the female housing 21 before the female terminal 2 is inserted into the female housing 21. This temporary locking projection 25b is engaged with a lower locked hole 43b (holder locked portion) of the holder 40, which will be described later, so that the female terminal locking portion is engaged by the double locking portion 44 of the holder 40, which will be described later. The holder 40 is temporarily locked at a position in front of the position where the elastic displacement of 23 is suppressed. At the time of this temporary locking, the front end portion of the female housing 21 and the seal member 50 are separated from each other.

  On the other hand, the upper main locking projection 25a and the lower main locking projection 25c are used for locking the holder 40 to the female housing 21 after the female terminal 2 is locked to the female terminal locking portion 23. Is. The main locking projections 25a and 25c are engaged with an upper locked hole 43a (holder locked portion) and a lower locked hole 43b of the holder 40, which will be described later, thereby locking the holder 40. . In this fully locked state, as shown in FIG. 4, the outer peripheral portion of the front end portion of the female connector 20 and the inner peripheral portion of the seal member 50 are in close contact with each other, and the outer peripheral portion of the male terminal holding portion 32 to be described later is sealed. The member 50 is in close contact. Furthermore, in this fully locked state, the double locking portion 44 of the holder 40 is inserted above the female terminal 2 locked to the female terminal locking portion 23, and the double locking portion 44 causes the female The upward movement of the terminal locking portion 23 is restricted.

  In addition, the outer peripheral surface of the female housing 21 has a shape that is recessed forward, and the size in the radial direction differs between a front end portion that is in close contact with a first waterproof portion 51 described later and a rear portion thereof. That is, the outer peripheral portion of the female housing 21 increases in the radial direction from the front end portion toward the rear, and the outer peripheral surface of the rear portion is in contact with the inner peripheral surface of the side wall 42 of the holder 40 described later. Have.

  The male housing 31 has a male housing base 35 as shown in FIGS. 1 and 4 and a hood 33 extending from the outer peripheral portion of the male housing base 35 to the female connector 20 side.

  A plurality of male terminal holding portions 32 protrude from the male housing base 35 to the female connector 20 side. The male terminal holding portions 32 are provided at positions corresponding to the female terminal accommodating chamber 22. The male terminal holding portions 32 hold the male terminals 3, respectively. The male terminals 3 protrude from the end surface of the male terminal holding portion 32 to the female connector 20 side. By fitting the protruding portions of the male terminals 3 and the plurality of female terminals 2, the male terminals 3 and the female terminals 2 are electrically connected.

  The hood 33 of the male housing 31 has a shape capable of accommodating the front end portion of the female connector 20 and the holder 40 inside thereof. On the outer peripheral surface of the hood 33, there is provided a locking projection 34 that engages with a locking arm 26 provided on the female housing 21. As described above, the engagement between the female terminal 2 and the male terminal 3 is locked by engaging the locking projection 34 with the locking arm 26.

  The holder 40 is made of resin or the like and has a holder base 41 and a side wall 42. The side wall 42 extends from the outer peripheral portion of the holder base 41 to the female connector 20 side. The holder base 41 has a shape that covers the front end surface of the female connector 20, and has a plurality of holder-side insertion holes 41 b into which the plurality of male terminal holding portions 32 can be inserted. In addition, the holder base 41 is provided with a plurality of double locking portions 44, and these double locking portions 44 penetrate through a first waterproof portion 51 of a seal member 50 described later and protrude toward the female connector 20 side. ing. When the holder 40 is fully locked to the female housing 21, these double locking portions 44 are located in the female terminal storage chamber 22 and above the female terminals 2 locked to the female terminal locking portions 23. Inserted into. And the front-end part of the female terminal latching | locking part 23 is controlled from elastically displacing by a vibration etc., and this suppresses that the latching state of the female terminal 2 is cancelled | released.

  The side wall 42 of the holder 40 is provided with an upper locked hole 43a and a lower locked hole 43b. This upper locked hole 43 a is for engaging with the upper main locking projection 25 a provided on the outer peripheral surface of the female housing 21 to fully lock the holder 40 to the female housing 21. Further, the lower engaged hole 43b engages with a temporary locking protrusion 25b provided on the outer peripheral surface of the female housing 21 to temporarily lock the holder 40 to the female housing 21 and on the outer peripheral surface of the female housing 21. The holder 40 is engaged with the female housing 21 by engaging with the provided lower main locking projection 25c.

  The seal member 50 is made of an elastic member such as rubber and is integrally formed with the holder 40 by two-color molding. The seal member 50 includes a first waterproof part 51 and a second waterproof part 52.

  The first waterproof part 51 of the seal member 50 has a shape that covers the front end face of the female housing 21. In addition, the first waterproof portion 51 is formed in one piece with the holder 40 as described above, and is in close contact with the rear end surface of the holder base 41 in advance. Further, the first waterproof portion 51 is formed with a plurality of seal side insertion holes 51b through which the male terminal holding portion 32 can be inserted at positions corresponding to the holder side insertion holes 41b provided in the holder base 41. ing. And the double latching | locking part 44 of the said holder 40 is provided so that this 1st waterproof part 51 may be penetrated in the vicinity of this seal | sticker side insertion hole 51b.

  The second waterproof portion 52 of the seal member 50 has a shape that extends from the outer peripheral portion of the first waterproof portion 51 toward the female connector 20 and surrounds the front end portion of the female connector 20. In addition, the second waterproof portion 52 is formed integrally with the holder 40 as described above, so that the outer peripheral surface thereof is in close contact with the inner peripheral surface of the side wall 42 of the holder 40 in advance.

  The holder-side insertion hole 41b of the first waterproof part 51 and the inner peripheral part of the second waterproof part 52 are respectively provided with convex protrusions 51a and 52a that protrude radially inward over the entire circumference.

  Next, a method for assembling the above components will be described.

  First, as shown in FIG. 3, the holder 40 is temporarily locked to the female housing 21. Specifically, the front end portion of the female housing 21 is inserted into the side wall 42 of the holder 40. And the temporary latching protrusion 25b provided in the female housing 21 and the lower latched hole 43b provided in the side wall 42 of the holder 40 are engaged. At this time, each tip portion of the double locking portion 44 of the holder 40 is inserted into the corresponding female terminal accommodating chamber 22. However, the insertion position of these double locking portions 44 is a position where the elastic displacement of the female terminal locking portion 23 is not restricted when the female terminal 2 is inserted into the female terminal accommodating chamber 22. If it does in this way, insertion of the double latching | locking part 44 in the female terminal storage chamber 22 and insertion of the female terminal 2 in this female terminal storage chamber 22 can be performed easily. At this time, the second waterproof portion 52 and the front end surface of the female housing 21 are separated from each other.

  Next, the plurality of female terminals 2 to which the electric wires 1 are connected are inserted into the female terminal accommodating chamber 22. Specifically, the female terminal locking portion 23 is inserted while being elastically displaced upward at the front end portion of the female terminal 2. Then, the locked portion 2 b provided on the upper portion of the female terminal 2 and the female terminal locking portion 23 are engaged to lock the female terminal 2 in the female terminal accommodating chamber 22.

  Next, as shown in FIG. 4, the holder 40 is permanently locked to the female housing 21. Specifically, first, the front end portion of the female housing 21 is inserted inside the second waterproof portion 52 while pressing the second waterproof portion 52 of the seal member 50 radially outward by the outer peripheral portion of the female housing 21. To do. Then, the upper locked hole 43a of the holder 40 and the upper main locking protrusion 25a of the female housing 21 are engaged. Furthermore, the lower locking hole 43 b of the holder 40 and the lower main locking projection 25 c of the female housing 21 are engaged to lock the holder 40 to the female housing 21.

  Here, the second waterproof portion 52 of the seal member 50 is elastically deformed when the outer peripheral portion of the female housing 21 presses the second waterproof portion 52 in the radial direction, and is in close contact with the outer peripheral portion of the female housing 21. The second waterproof portion 52 is formed integrally with the holder 40 as described above, and the outer peripheral portion of the second waterproof portion 52 and the inner peripheral portion of the side wall 42 of the holder 40 are in close contact with each other. Accordingly, as described above, the second waterproof portion 52 is in close contact with the outer peripheral portion of the female housing 21, so that the gap between the side wall 42 of the holder 40 and the female housing 21 is sealed. In particular, since the second waterproof portion is provided with the contact convex portion 52a as described above, the clearance is more reliably sealed when the contact convex portion 52a is in close contact with the outer peripheral portion of the female housing 21. Is done.

  If the outer peripheral portion of the female housing 21 is sealed in this way, the outer sides of the plurality of female terminal accommodating chambers 22 are collectively surrounded by the second waterproof portion 52, so that the holder 40 and the female housing 21 Water intrusion into the female terminal accommodating chamber 22 from the gap is reliably suppressed. In particular, this waterproof function is realized by the second waterproof portion 52 being pressed in the radial direction by the outer peripheral portion of the female housing 21. Accordingly, the waterproof connector 10 is vibrated, and the holder 40 and the female housing 21 are provided in the locked holes 43a and 43b of the holder 40 and the locking projections 25a and 25c of the female housing 21 that engage with these. Even if it is relatively displaced in the direction of the clearance axis, its waterproof function is maintained. That is, even when the waterproof connector 10 is subjected to a strong impact, it is possible to reliably suppress the flooding of the female terminal accommodating chamber 22.

  If the second waterproof part 52 and the side wall 42 of the holder 40 are integrally formed as described above, when the female housing 21 is inserted inside the second waterproof part 52, the second waterproof part 52 Shifting can be suppressed. Further, as described above, the outer peripheral surface of the female housing 21 is recessed toward the front, and the outer peripheral surface of the female housing 21 and the inner peripheral surface of the side wall 42 of the holder 40 are brought into contact with each other at the rear portion. Therefore, the female housing 21 can be inserted while suppressing the radial displacement of the female housing 21 with respect to the holder 40.

  Further, at the time of the main locking, the double locking portion 44 of the holder 40 is inserted above the female terminal 2 locked by the female terminal locking portion 23. As a result, the female terminal locking portion 23 is less likely to move upward from the locking position for locking the female terminal 2 to the locking release position for releasing the locked state, so that the female terminal 2 is more reliably connected. It is held in the female terminal accommodating chamber 22. Therefore, even when the electric wire 1 connected to the female housing 21 is pulled, the female terminal 2 cannot move the female terminal locking portion 23 to the locking release position. Can be reliably deterred.

  Next, the holder 40 and the female connector 20 are inserted inside the hood 33 of the male housing 31. And the protrusion part of the male terminal 3 is each inserted in the female terminal 2 currently hold | maintained at the female terminal storage chamber 22, and the male terminal 3 and the female terminal 2 are fitted. Specifically, the male terminal 3 is inserted into the holder side insertion hole 41 b of the holder 40 and the seal side insertion hole 51 b of the first waterproof part 51 of the seal member 50. Further, the male terminal holding portion 32 holding the male terminals 3 is pressed by the outer peripheral portion thereof toward the radially outer side of the inner peripheral surface of the seal side insertion hole 51b, while the holder side insertion hole 41b and the seal side. It inserts into the insertion hole 51b. Then, the locking arm 26 provided on the female housing 21 and the locking projection 34 of the male housing 31 are engaged to lock the fitting.

  Here, the first waterproof portion 51 is elastically deformed when the outer peripheral portion of the male terminal holding portion 32 presses the inner peripheral surface of the seal-side insertion hole 51b in the radial direction, and the inner peripheral surface of the seal-side insertion hole 51b. Closely contacts the outer peripheral portion of the male terminal holding portion 32. Thereby, the periphery of the male terminal holding part 32 is sealed by the first waterproof part 51. In particular, since the close contact convex portion 51a is provided on the inner peripheral surface of the seal side insertion hole 51b as described above, the close contact convex portion 51a is in close contact with the outer peripheral portion of the male terminal holding portion 32. This outer peripheral part is more reliably sealed.

  If the periphery of the male terminal holding part 32 is sealed in this way, even if water enters from the holder side insertion hole 41b of the holder 40, the male terminal 3 protrudes from the periphery of the male terminal holding part 32. It is possible to reliably suppress the intrusion to the side to be performed. In particular, this waterproof function is realized by pressing the inner peripheral surface of the seal-side insertion hole 51 b of the first waterproof portion 51 in the radial direction by the outer peripheral portion of the male terminal holding portion 32. Accordingly, vibration is applied to the waterproof connector 10, and the male connector 30 and the female connector 20 are relatively displaced in the direction of the clearance split axis provided on the locking projection 34 of the male housing 31 and the locking arm 26 of the female housing 21. Even so, its waterproof function is maintained.

  As described above, in the waterproof connector 10, the inner peripheral surface of the seal-side insertion hole 51 b formed in the first waterproof portion 51 of the seal member 50 and the outer peripheral portion of the male terminal holding portion 32 are brought into close contact with each other. Since the periphery of 32 is sealed, water can be prevented from entering the female connector 20 side from the outer peripheral portion of the male terminal holding portion 32. In particular, since the sealing state is realized by pressing the inner peripheral surface of the seal-side insertion hole 51b in the radial direction by the outer peripheral portion of the male terminal holding portion 32, the waterproof connector 10 vibrates in the axial direction. Even if there is, a waterproof function can be secured.

  In the waterproof connector 10, the inner peripheral portion of the second waterproof portion 52 of the seal member 50 and the outer peripheral portion of the front end portion of the female housing 21 are brought into close contact with each other, and the side wall 42 of the holder 40 and the outer peripheral portion of the female housing 21 are in close contact with each other. Since the gap is sealed, water can be prevented from entering the female terminal accommodating chamber 22 from the gap. In particular, since the second waterproof part 52 is pressed in the radial direction by the outer peripheral part of the female housing 21, the second waterproof part 52 is brought into close contact with the outer peripheral part of the female housing 21. Even when it vibrates, this sealed state can be maintained.

  In particular, when the female connector 20, the holder 40, and the male connector 30 are engaged in the axial direction as in the waterproof connector 10, the main locking projections 25a and 25c of the female housing 21 as the respective engagement portions are provided. Since it is necessary to provide clearance in the locked holes 43a and 43b of the holder 40 that engages with this, or the locking arm 26 of the female housing 21 and the locking projection 34 of the male housing 31 that engages with this, When vibration is applied to the waterproof connector 10, the axial deflection is larger than the radial deflection. Therefore, if the sealing member 50 is waterproofed by pressing in the radial direction as described above, the fluctuation range of the pressing force can be reduced as compared with the case where the sealing member is pressed in the axial direction.

  As described above, in the waterproof connector 10, vibration is applied to the waterproof connector 10, and the connectors 20, 30 and the holder 40 are relatively displaced in the axial direction according to the clearances of the engagement portions provided in the connectors. Even if it exists, the pressing state of the sealing member 50 can be maintained, and the flooding to the protrusion part of the female terminal accommodating chamber 22, the male terminal 3, etc. can be suppressed reliably.

  In the waterproof connector 10, the seal member 50 is formed integrally with the holder 40 by two-color molding. Therefore, when the female housing 21 is inserted inside the second waterproof portion 52, the male terminal holding portion 32 is provided. When the first waterproof part 51 is inserted into the seal-side insertion hole 51b, the first and second waterproof parts 51 and 52 can be prevented from being displaced. Moreover, since it becomes possible to more reliably seal between the inner peripheral part of the side wall 42 of the holder 40 and the outer peripheral part of the second waterproof part 52 and between the holder base part 41 and the first waterproof part 51, The said water immersion can be suppressed more reliably. Furthermore, when the double locking portion 44 of the holder 40 is provided so as to penetrate the first waterproof portion 51, it is possible to reliably suppress misalignment between the double locking portion 44 and the first waterproof portion 51. It becomes possible.

  In addition, as described above, if the first and second waterproof portions 51 and 52 are provided with the contact convex portions 51a and 52a, respectively, the inner peripheral surface of the seal-side insertion hole 51b of the first waterproof portion 51 is further increased. While being able to make it contact | adhere to the outer peripheral part of the male terminal holding | maintenance part 32 reliably, the inner peripheral part of the 2nd waterproof part 52 can be more closely attached to the outer peripheral part of the female housing 21, and the said water immersion can be ensured more reliably. Can be suppressed.

  Further, in the waterproof connector 10, since the double locking portion 44 is provided in the holder 40, the female terminal locking portion 23 locks the female terminal 2 even when a tensile force is applied to the electric wire 1. Elastic displacement to the unlocking position is suppressed. Therefore, the position shift of the female terminal 2 can be more reliably suppressed, and a connection failure or the like associated with the position shift can be avoided. In addition, by configuring the double locking portion 44 to penetrate the first waterproof portion 51, the waterproof function by the first waterproof portion 51 and the second waterproof portion 52 can be achieved without increasing the size of the waterproof connector 10. While ensuring, it becomes possible to avoid more reliably the terminal position shift by the double locking part 44.

  Further, as described above, the female housing 21 is provided with the temporary locking projections 25b, and the holder 40 is positioned at a position ahead of the elastic locking of the female terminal locking portion 23 by the double locking portion 44. If it is configured so as to be temporarily locked to 21, the insertion operation of the female terminal 2 before the double locking portion 44 suppresses the elastic displacement of the female terminal locking portion 23 can be performed efficiently.

  Here, although the case where the sealing member 50 and the holder 40 are integrally molded by two-color molding has been described in the above embodiment, the sealing member 50 and the holder 40 may be integrally molded by insert molding or the like without being limited to two-color molding. Further, the seal member 50 may be bonded to the holder 40 with an adhesive or the like.

It is sectional drawing of the waterproof connector which concerns on embodiment of this invention. It is a disassembled sectional view which decomposes | disassembles and shows the female housing and holder of the said waterproof connector. It is a disassembled sectional view which decomposes | disassembles and shows the female housing and female terminal of the said waterproof connector. It is a disassembled sectional view which decomposes | disassembles and shows the said waterproof connector. It is a rear view of the holder of the said waterproof connector. It is sectional drawing of the conventional waterproof connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric wire 2 Female terminal 3 Male terminal 10 Waterproof connector 20 Female connector 21 Female housing 22 Female terminal storage chamber 23 Female terminal latching | locking part 25a Upper main latching protrusion (holder latching part)
25c Lower main locking protrusion (holder locking portion)
30 Male connector 31 Male housing 32 Male terminal holding portion 33 Hood 40 Holder 41 Holder base 42 Side wall 41b Holder side insertion hole 43a Upper locked hole (holder locked portion)
43b Lower locked hole (holder locked portion)
44 Double locking part 50 Seal member 51 First waterproof part 51a Adhering convex part 51b Seal side insertion hole 52 Second waterproof part 52a Adhering convex part

Claims (4)

A female connector comprising a plurality of female terminals to which an electric wire is connected and a female housing for holding the plurality of female terminals;
A male connector comprising a plurality of male terminals to which an electric wire is connected and a male housing for holding the plurality of male terminals;
A holder locked to the female housing so as to surround a front end portion of the female connector;
A seal member bonded to the holder,
The female housing includes a plurality of female terminal receiving chambers into which the plurality of female terminals are inserted from the rear, and a plurality of female terminal locking portions for locking the female terminals inserted into the plurality of terminal receiving chambers, respectively. And a holder locking portion for locking the holder,
The female terminal locking portion is elastically displaceable between a locking position at which the female terminal can be locked and a locking release position that retracts from the locking position and releases the locked state of the female terminal. Have a shape,
The male housing has a plurality of male terminal holding portions that respectively hold the plurality of male terminals so as to protrude to the female connector side,
The holder has a holder base that covers the front end surface of the female connector, and a side wall that extends from the outer peripheral portion of the holder base toward the female connector and accommodates the front end portion of the female connector on the inner peripheral portion thereof.
The holder base portion is inserted into the plurality of holder side insertion holes through which the plurality of male terminal holding portions can be inserted, and the plurality of female terminal receiving chambers, respectively, and the female terminal locking portion is engaged from the locking position. A plurality of double locking portions that suppress elastic displacement to the stop release position;
The side wall of the holder has a holder locked portion that engages with the holder locking portion on an outer peripheral portion thereof,
The seal member covers a front end surface of the female connector and includes a first waterproof portion having a plurality of seal side insertion holes through which the male terminal holding portion can be inserted at a position corresponding to the holder side insertion hole; A second waterproof part extending from the outer peripheral part of the waterproof part to the female connector side,
The front end surface of the first waterproof portion is bonded to the rear end surface of the holder base, and when the female connector and the male connector are fitted, the inner peripheral surface of the seal side insertion hole is the male terminal holding portion. The outer peripheral portion of the male terminal holding portion is in close contact with the outer peripheral portion of the male terminal holding portion so that the periphery of the male terminal holding portion is sealed,
The outer peripheral part of the second waterproof part is bonded to the inner peripheral surface of the side wall of the holder, and the inner peripheral part is the female housing when the holder locking part and the holder locked part are engaged. The outer periphery of the female housing is closely pressed to the outer peripheral portion of the female housing, and has a shape that seals the gap between the holder and the female housing over the entire circumference,
The double-locking portion protrudes from the base portion of the holder through the second waterproof portion and protrudes toward the female connector, and the protruding end portion is inserted into the female terminal accommodating chamber. The waterproof connector according to claim 1,
The waterproof connector, wherein the seal member is formed integrally with the holder, and the first waterproof part is formed in an area excluding the seal side insertion hole and the double locking part. The waterproof connector according to claim 1 or 2,
A waterproof connector characterized in that an inner peripheral portion of the second waterproof portion of the sealing member is provided with a protruding convex portion that protrudes radially inward and can be in close contact with the outer peripheral portion of the female housing from the radially outer side. The waterproof connector according to any one of claims 1 to 3,
The female housing is positioned in front of the position where the female terminal is locked to the female terminal locking portion and the elastic displacement of the female terminal locking portion is suppressed by the double locking portion. A waterproof connector comprising a holder temporary locking portion for temporarily locking the holder.

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