JP6317990B2 - Connector waterproof structure - Google Patents

Description

  The present invention relates to a waterproof structure of a connector, and more particularly to a waterproof structure that seals a gap between connectors.

  Conventionally, waterproof connectors for connecting different electric wires are mounted on a moving body such as a motorcycle. This type of connector includes a male housing that accommodates a male terminal to which an electric wire is connected, and a female housing that accommodates a female terminal to which another electric wire is connected. The male housing is fitted into the female housing. In this case, the rubber packing is provided in the gap formed between the outer peripheral surface of the male housing and the inner peripheral surface of the female housing, thereby preventing water from entering from the gap between the housings.

  On the other hand, Patent Document 1 discloses a waterproof structure for a connector that seals housings without using rubber packing. In this waterproof connector, one housing encloses a cylindrical inner hood portion from the circumferential direction with an outer hood portion, and the other housing has annular seal protrusions on both the inner and outer peripheral surfaces of the outer cylinder. It is formed by providing a part.

  According to this, when one housing is fitted into the other housing, the seal protrusion on the outer peripheral surface of the outer cylinder comes into contact with the inner peripheral surface of the outer hood portion in the circumferential direction, and the inner periphery of the outer cylinder The surface seal protrusion is in contact with the outer peripheral surface of the inner hood portion in the circumferential direction. As a result, a waterproof structure is formed at two locations, the gap between the outer hood portion and the outer cylinder, and the gap between the inner hood portion and the outer cylinder, so that waterproofness can be ensured without using rubber packing. it can.

JP-A-7-153523

  By the way, in the waterproof structure of patent document 1, at the time of assembly | attachment of housings, each seal protrusion of the other housing moves, pressing each hood part of one housing. For this reason, there is a problem that the fitting load when the housings are fitted with each other due to the friction between the seal projection and each hood increases, and the burden of the assembling work increases.

  In addition, the seal protrusion may be scraped when the seal protrusion comes into contact with each hood portion. In this case, if the scrap residue of the seal protrusion is caught in the gap between the two housings, there is a possibility that the two housings cannot be fitted at the proper positions. Further, when the seal protrusion deforms in contact with each hood portion, the force with which the seal protrusion presses the inner peripheral surface or outer peripheral surface of the outer cylinder is weakened, which may reduce the sealing performance.

The present invention has been made in view of such problems, and it is an object of the present invention to prevent deformation and scraping of the seal portion of the connector during assembly of the connector and reduce the fitting load between the housings. To do.

To solve the above problems, the present invention includes a cylindrical portion open end of the terminal accommodating chamber for accommodating a terminal of the first housing is formed, the open end of the terminal accommodating chamber for accommodating a terminal of the second housing A waterproof structure for a connector that opposes a formed cylindrical portion and seals a gap between opposing cylindrical ends at the periphery of these opening ends, and is provided in a gap between the cylindrical ends of the first housing and the second housing. the annular member is sandwiched made of an elastic material, the annular member includes a first annular portion of the umbrella type formed diverging toward the cylindrical end of the first housing, diverging toward the cylindrical end of the second housing An umbrella-shaped second annular portion formed, and the umbrella-shaped proximal end portions of the first annular portion and the second annular portion are coaxially connected to each other in a back-to-back manner. Is smaller than the outer diameter of the opposite cylinder ends of the first housing and the second housing The outer peripheral corner of the cylinder end of the first housing is in contact with the inner peripheral surface of the first annular portion, and the outer peripheral corner of the tube end of the second housing is in contact with the inner peripheral surface of the second annular portion. It is characterized by being made.

According to this, the annular member is provided so that the peripheral edge of the opening end of the first housing is in contact with the first annular portion, and the peripheral edge of the opening end of the second housing is connected to the second annular portion of the annular member. By abutting, the gap between the peripheral edges of the open ends of both housings can be sealed with an annular member. Further, when the annular member is pressed against each housing, the first annular portion and the second annular portion are elastically deformed along the axial direction, respectively. For this reason, since the annular member can absorb these vibrations when each housing vibrates, for example, the connection state between the terminals can be favorably maintained. Further, since the second housing can maintain a non-contact state until it comes into contact with the annular member, it is possible to prevent damage such as deformation and scraping during assembly, and to reduce the fitting load between the housings. Can do.

  In this case, the first housing has an inner cylinder part in which an open end of a terminal accommodating chamber for accommodating the terminal of the first housing is formed, and an outer cylinder part surrounding the outer surface of the inner cylinder part. The annular member can be held inside the outer cylinder part.

  According to this, since the annular member can be protected by the outer tube portion, the deterioration of the annular member with time can be suppressed and the elasticity can be maintained. Therefore, the sealing function of the annular member and the function of absorbing vibration can be maintained for a long time.

  Further, the annular member is assumed to be held on the inner side of the outer cylinder part by engaging the protrusion protruding from the outer surface of the annular member with the concave part on the inner surface of the outer cylinder part.

  According to this, the annular member can maintain the posture in which the peripheral edge of the opening end of the inner cylinder part is brought into contact with the first cylinder part by engaging the protrusion with the recess of the outer cylinder part. Attaching work can be performed efficiently.

According to the present invention, it is possible to prevent deformation and scraping of the seal portion of the connector during assembly, and to reduce the fitting load between the housings.

It is a top view of the waterproof connector to which the present invention is applied. It is a disassembled perspective view of the male connector which comprises the waterproof connector of FIG. It is a disassembled perspective view of the female connector which comprises the waterproof connector of FIG. It is a longitudinal cross-sectional view before a male connector and a female connector fit. It is a longitudinal cross-sectional view after a male connector and a female connector fit. It is a perspective view showing the longitudinal section of a male connector. It is a longitudinal cross-sectional view of an annular member. It is a longitudinal cross-sectional view of other embodiment of an annular member.

  Hereinafter, an embodiment of a waterproof structure of a connector to which the present invention is applied will be described with reference to the drawings. In this embodiment, a waterproof connector mounted on a moving body such as a motorcycle will be described as an example. However, the connector of the present invention can also be applied to other uses.

  1 is a top view of a waterproof connector to which the present invention is applied, FIG. 2 is an exploded perspective view of a male connector constituting the waterproof connector of FIG. 1, and FIG. 3 is a female connector constituting the waterproof connector of FIG. FIG. 4 and 5 show a cross section taken along line AA in FIG. 1, FIG. 4 shows a state before the male connector and the female connector are connected, and FIG. 5 shows the male connector and the female connector. The state after being connected is shown.

  As shown in FIG. 1, the waterproof connector 11 fits the male connector 13 and the female connector 15 to each other, and electrically connects the male terminal 17 accommodated in the male connector 13 and the female terminal 19 accommodated in the female connector 15. Connected. An electric wire is connected to each terminal. The male connector 13 and the female connector 15 are both formed in a cylindrical shape from an insulating synthetic resin. In the following description, the right side in FIG. 1 is defined as the rear and the left side is defined as the front, and these definitions are applied to the description of other drawings as appropriate.

  As shown in FIGS. 2 and 4, the male connector 13 includes a male terminal 17 to which the electric wire 21 is connected, and a male housing 23 (first housing) that houses the male terminal 17. The male housing 23 includes a plate-like base portion 25, a rectangular tube-like inner tube portion 27 extending in the front-rear direction of the base portion 25, and a front portion extending from the base portion 25 so as to surround the outer peripheral surface of the inner tube portion 27. A rectangular tube-shaped outer tube portion 29 is integrally provided. The front end surface of the inner cylinder portion 27 is located behind the front end surface of the outer cylinder portion 29. The outer cylinder part 29 has a peripheral wall continuous with the peripheral wall of the base part 25 and is formed in a rectangular tube shape. A male terminal accommodating chamber 31 for accommodating the male terminal 17 is formed in the inner cylinder portion 27 in the axial direction.

  The male terminal accommodating chamber 31 accommodates a plurality (for example, two) of male terminals 17 separated from each other by a partition wall (not shown), and holds each male terminal 17 at a set position by a lance. The male terminal accommodating chamber 31 communicates with the open end 33 of the inner cylinder portion 27 extending forward of the base portion 25, and communicates with the through hole 35 of the inner cylinder portion 27 extending rearward of the base portion 25. The The electric wire 21 is accommodated in the through hole 35.

  As shown in FIG. 2, the male terminal 17 is formed of a conductive metal plate or the like, and integrally includes an electric wire connection portion 37 that crimps and connects the core wire of the electric wire 21 and a male tab 39. The male tab 39 is formed in a linear shape extending in a straight line. The male terminal 17 protrudes from the opening end 33 in a state where the male terminal 17 is accommodated in the set position of the male terminal accommodating chamber 31, and is accommodated in the normal position of the outer cylinder portion 29. It is provided to extend forward from the annular member 41 (described later).

  The outer cylindrical portion 29 is provided with a lock protrusion 43, a pair of first guide ribs 45, and a pair of second guide ribs 47 that protrude outward. The first guide rib 45 and the second guide rib 47 are provided so as to extend in the fitting direction of the male connector 13 and the female connector 15 and are provided in pairs. A lock protrusion 43 is positioned inside the pair of first guide ribs 45. As will be described later, the first guide rib 45 and the second guide rib 47 are respectively guided along the guide groove 51 on the inner wall of the female housing 49, and the male connector 13 and the female connector 15 are fitted in a normal direction. As will be described later, the lock protrusion 43 is engaged with an engagement portion 55 of the lock arm 53 of the male connector 13.

  On the other hand, as shown in FIGS. 3 and 4, the female connector 15 includes a female terminal 19 to which the electric wire 57 is connected, and a female housing 49 (second housing) that houses the female terminal 19. The female housing 49 includes a base 59, a rectangular tubular main body 61 that extends in the front-rear direction of the base 59, and a hood 63 that extends rearward from the base 59 and surrounds the outer peripheral surface of the main body 61. Provide one. The hood part 63 has a peripheral wall continuous with the peripheral wall of the base part 59 and is formed in a rectangular tube shape. In the main body 61, a female terminal accommodating chamber 65 for accommodating the female terminal 19 is formed in the axial direction.

  When the male connector 13 and the female connector 15 are fitted into the annular gap between the main body portion 61 and the hood portion 63, the outer cylinder portion 29 of the male housing 23 is inserted. At this time, the outer peripheral surface of the main body portion 61 accommodated inside the outer cylinder portion 29 is provided at a predetermined interval in the circumferential direction from the inner peripheral surface of the outer cylinder portion 29.

  The female terminal accommodating chamber 61 accommodates a plurality (for example, two) of female terminals 19 separated by a partition wall (not shown), and holds each female terminal 19 at a set position with a lance. The female terminal accommodating chamber 61 communicates with an opening end 67 on the distal end surface of the main body 61 that extends rearward from the base 59, and communicates with a through hole 69 in the main body 61 that extends forward of the base 59. It is formed. An electric wire 57 is accommodated in the through hole 69.

  The female terminal 19 is formed of a conductive metal plate or the like, and integrally includes an electric wire connection portion 71 that crimps and connects the core wire of the electric wire 57 and a cylindrical electric contact portion 73 that is continuous with the electric wire connection portion 71. The electrical contact portion 73 is disposed at a position that is flush with the opening end 67 by a set distance from the opening end 67 in a state where the female terminal 19 is housed in the setting position of the female terminal housing chamber 65. The electrical contact portion 73 is electrically connected to the male terminal 17 when the male tab 39 of the male terminal 17 enters inside.

  The hood part 63 is provided with four guide grooves 51 on the inner wall. The guide groove 51 is provided along the direction in which the outer cylindrical portion 29 of the male housing 23 is inserted, so that the pair of first guide ribs 45 and the pair of second guide ribs 47 of the male housing 23 described above are inserted. It has become.

  The hood portion 63 is provided with a lock arm 53. As shown in FIG. 4, the lock arm 53 includes a pair of leg portions 75 erected from the front end side (left side in FIG. 4) of the hood portion 63 and extending to the rear end side of the hood portion 63, and a pair of legs. And a lock portion 77 that is supported by the rear end portion of the portion 75 in a cantilever manner and extends to the front end side of the hood portion 63. The rear ends of the pair of leg portions 75 are connected to each other by the first connecting portion 79, and the front end portions of the pair of lock portions 77 are connected to each other by the second connecting portion 81. Then, the locking projection 43 of the male housing 23 described above engages with the engaging portion 55 formed between the pair of leg portions 75 and the first connecting portion 79, so that the male housing 23 and the female housing 47 The fitting state is maintained.

  As shown in FIG. 2, an annular waterproof plug 83 is attached to the electric wire 21, and the through hole 35 of the inner cylinder portion 27 is in a state where the male terminal 17 is accommodated in the normal position of the male terminal accommodating chamber 31. The waterproof plug 83 seals the gap between the outer peripheral surface of the electric wire 21 drawn out from the inner peripheral surface of the through hole 35. Similarly, as shown in FIG. 3, an annular waterproof plug 85 is attached to the electric wire 57, and the body portion 61 penetrates in a state where the female terminal 19 is accommodated in the normal position of the female terminal accommodating chamber 65. The waterproof plug 85 seals the gap between the outer peripheral surface of the electric wire 57 drawn out from the hole 69 and the inner peripheral surface of the through hole 69.

  Next, the annular member 41 that is a characteristic configuration of the present embodiment will be described. FIG. 6 is a perspective view of a longitudinal section of the male housing 23 in FIG. 1 in the direction of arrows AA, and shows a state where the annular member 41 is attached.

  In the present embodiment, when the male housing 23 and the female housing 49 are fitted in a normal position, the opening end 33 of the inner cylindrical portion 27 of the male housing 23 and the opening end 67 of the main body portion 61 of the female housing 49 face each other. An annular member 41 made of synthetic resin is sandwiched between gaps between the peripheral edges of the opening ends.

  As shown in FIG. 7, the annular member 41 is formed with an umbrella-shaped first cylindrical portion 87 having an inner peripheral surface and an outer peripheral surface that are formed to expand toward the male housing 23 and to expand toward the female housing 49. The inner cylindrical surface and the umbrella-shaped second cylindrical portion 89 having the outer peripheral surface are coaxially connected back to back, and the first cylindrical portion 87 and the second cylindrical portion 89 are overlapped at the end. Is done. The annular member 41 is formed in a rectangular shape in cross section so as to correspond to the cross-sectional shape of the rectangular tubular main body 61 of the female housing 49.

  In the annular member 41, when the male housing 23 and the female housing 49 are fitted to each other at regular positions, the peripheral edge of the opening end 33 of the inner cylinder part 27 is on the entire circumference on the inner peripheral surface of the first cylinder part 87. Further, the peripheral edge of the opening end 67 of the main body portion 61 is in contact with the inner peripheral surface of the second cylindrical portion 89 over the entire circumference. Further, at this time, the annular member 41 is configured such that the first cylindrical portion 87 is pressed against the inner cylindrical portion 27 and the second cylindrical portion 89 is pressed against the main body portion 61, so It is elastically deformed in the direction in which the peripheral surface expands (the direction that shrinks in the axial direction).

  The annular member 41 is provided with one or a plurality of protrusions 91 on the outer peripheral surface. The protrusion 91 is engageable with a recess 93 formed on the inner surface of the outer cylinder portion 29. In the present embodiment, as shown in FIG. 6, on the inner surface of the outer cylindrical portion 29, a groove portion 94 that is continuous with the concave portion 93 is formed along the axial direction from the opening end of the outer cylindrical portion 29. The annular member 41 is pushed into the outer cylindrical portion 29 in a state where the protruding portion 91 is engaged with the groove portion 94, and when the protruding portion 91 is engaged with the recessed portion 93, The periphery is brought into contact with the inner peripheral surface of the first tube portion 87, and the posture at this time is maintained (FIG. 5). The concave portion 93 is provided with a certain gap in a state in which the protruding portion 91 is engaged, and the protruding portion 91 has a backlash.

  When assembling the waterproof connector 11 described above, first, the male terminal 17 to which the electric wire 21 is connected is inserted from the through hole 35 of the male housing 23, and the female terminal 17 is accommodated in a predetermined position of the male terminal accommodating chamber 31. While holding with the lance, the waterproof plug 83 attached to the electric wire 21 is pushed into the through hole 35 to seal the gap with the through hole 35.

  On the other hand, the female terminal 19 to which the electric wire 57 is connected is inserted from the through hole 69 of the female housing 49, and the female terminal 19 is accommodated in a predetermined position of the female terminal accommodating chamber 65 and held by a lance, and attached to the electric wire 57. The waterproof plug 83 is inserted into the through hole 69 to seal the gap with the through hole 69.

  Next, the annular member 41 is assembled to the outer cylinder portion 29 of the male housing 23. At this time, the annular member 41 is pushed into the outer cylinder portion 29 in a state where the protrusion 91 is fitted in the groove portion 94 of the inner wall of the outer cylinder portion 29. The annular member 41 pushed into the outer cylindrical portion 29 engages with the concave portion 93 where the projecting portion 91 continues to the groove portion 94, and the peripheral edge of the opening end 33 of the inner cylindrical portion 27 on the inner peripheral surface of the first cylindrical portion 87. Abut and this posture is maintained.

  Subsequently, as shown in FIG. 4, the male housing 23 and the female housing 49 are faced to bring the male housing 23 and the female housing 49 closer to each other. At this time, in the male housing 23, the first guide rib 45 and the second guide rib 47 are respectively fitted in the guide grooves 51 of the female housing 49, and the male housing 23 is placed between the main body 61 and the hood 63 while maintaining a normal posture. The cylinder part 29 is guided.

  Thus, when the male housing 23 and the female housing 49 are brought close to each other, first, the distal end portion of the male tab 39 protruding from the opening end 33 of the male housing 23 is electrically connected to the electrical terminal 19 via the opening end 67 of the female housing 49. It enters the contact portion 73 (FIG. 3).

  Subsequently, as shown in FIG. 5, when the female housing 49 is fitted in a normal position with respect to the male housing 23, the peripheral edge of the opening end 67 of the main body 61 of the female housing 49 becomes the second of the annular member 41. It contacts the inner peripheral surface of the cylindrical portion 89. Further, the distal end portion of the male tab 39 is accommodated in a regular position of the electrical contact portion 73 of the female terminal 19. Thereby, the electrical connection between the male terminal 17 and the female terminal 19 is completed.

  And as for the main-body part 61 contact | abutted with the annular member 41, the periphery of the opening end 67 presses the internal peripheral surface of the 2nd cylinder part 89 of the annular member 41 from the circumferential direction. For this reason, the annular member 41 is elastically deformed in the direction in which the inner peripheral surfaces of the first cylinder part 87 and the second cylinder part 89 expand (direction in which the inner peripheral surface contracts in the axial direction). As a result, the restoring force (spring force) when the first cylindrical portion 87 and the second cylindrical portion 89 are elastically deformed at the peripheral edge of the opening end 33 of the inner cylindrical portion 27 and the peripheral edge of the opening end 67 of the main body portion 61. Acts on the entire circumference. Accordingly, the peripheral edge of the opening end 33 of the inner cylinder part 27 and the peripheral edge of the opening end 67 of the main body part 61 are strongly pressed against the annular member 41, respectively. The gap with the peripheral edge of 67 is hermetically sealed through the annular member 41.

  On the other hand, in the process in which the male housing 23 and the female housing 49 approach each other, the lock protrusion 43 provided on the male housing 23 comes into contact with the first connection portion 79 formed on the lock arm 53 of the female housing 49, and the first connection. The pair of leg portions 73 connected to the portion 79 are elastically deformed to get over the first connecting portion 79 and engage with the engaging portion 55. Accordingly, the relative position between the female housing 49 and the male housing 23 is maintained, and the state in which the peripheral edge of the opening end 67 of the main body 61 presses the inner peripheral surface of the second cylindrical portion 89 of the annular member 41 is maintained. For this reason, it is possible to prevent water from entering through a gap between the annular member 41 and the peripheral edge of the opening end 67 of the main body 61 or a clearance between the annular member 41 and the peripheral edge of the opening end 33 of the inner cylinder part 27. it can.

  Further, the gap between the through hole 35 and the electric wire 21 is sealed with a waterproof plug 83, and the gap between the through hole 69 and the electric wire 57 is sealed with a waterproof plug 85. For this reason, since the male terminal accommodating chamber 31 and the female terminal accommodating chamber 65 can completely prevent the entry of water from the outside, the connection state between the male terminal 17 and the female terminal 19 can be kept good.

  Further, since the annular member 41 is sandwiched between the inner cylinder portion 27 and the main body portion 61 in a state where it can be elastically deformed, for example, when the waterproof connector 11 vibrates, the annular member 41 expands and contracts in the axial direction. By repeating elastic deformation, vibration can be absorbed. Thereby, since it can suppress that a vibration propagates to each terminal 17 and 19, the electrical connection state between terminals can be maintained favorable.

  As described above, in this embodiment, the resin annular member 41 is formed in the gap between the peripheral edge of the opening end 33 of the inner cylindrical portion 27 of the male housing 23 and the peripheral edge of the opening end 67 of the main body 61 of the female housing 49. The annular member 41 is pressed and elastically deformed by the inner cylindrical portion 27 and the main body portion 61 when the male housing 23 and the female housing 49 are fitted in a regular position. As a result, the contact area between the peripheral edge of the opening end 33 of the inner cylindrical portion 27 and the annular member 41 and the contact area between the peripheral edge of the opening end 67 of the main body 61 and the annular member 41 are strongly adhered in the circumferential direction. Therefore, it is possible to prevent water from entering through these contact areas. In the waterproof connector 11 of the present embodiment, the pressing amount (insertion amount) for pressing the annular member 41 is appropriately set so that the opening end 67 of the main body 61 presses the annular member 41 within a range in which the annular member 41 can be elastically deformed. The

  According to the present embodiment, when the male housing 23 and the female housing 49 are fitted, the peripheral edge of the opening end 67 of the main body 61 is maintained in a non-contact state until it contacts the annular member 41. Damage due to the fitting between the housing 23 and the female housing 49 can be prevented, and the fitting load between the two housings can be reduced, so that the burden of the assembling work can be reduced.

  According to this embodiment, since the rubber packing generally used in the conventional seal structure can be eliminated, it is not necessary to include the thickness of the rubber packing in the width dimension in the direction intersecting the axial direction of the connector. As a result, the connector can be made compact.

  In the present embodiment, since the annular member 41 is positioned (held) inside the outer cylinder portion 29, for example, it is possible to suppress a decrease in elasticity of the annular member 41 due to deterioration over time. Thereby, the deterioration of the sealing performance of the annular member 41 and the vibration absorption effect can be maintained for a long time. Further, by forming the annular member 41 from a general-purpose synthetic resin material or the like, it is possible to prevent deterioration with time like a rubber material. However, the annular member 41 may be formed of a material other than the synthetic resin (for example, a rubber material) as long as predetermined elastic deformation is possible.

  In the present embodiment, as shown in FIG. 5, the female housing 49 has a step in which the width dimension in the direction orthogonal to the axial direction becomes smaller on the opening end 67 side when the tip portion of the main body 61 is viewed from the cross-sectional direction. A portion 95 is provided. For this reason, for example, even if foreign matter adheres to the vicinity of the opening end 67 of the main body 61, the foreign matter can be released to the stepped portion 95, and therefore, the sealing surface of the main body 61 that contacts the annular member 41 and the annular member 41. It is possible to prevent damage to the sealing surface due to foreign matter being sandwiched between them, and to prevent deterioration of the sealing performance.

  As mentioned above, although embodiment of this invention was explained in full detail with drawing, said embodiment is only the illustration of this invention, It can change and change within the range described in the claim. is there.

  For example, the annular member may have a first cylinder part 87 that is elastically deformed by being pressed by the inner cylinder part 27 and a second cylinder part 89 that is elastically deformed by being pressed by the main body part 61. The 1st cylinder part 87 and the 2nd cylinder part 89 can also be formed in both ends, respectively. Further, as shown in FIG. 8, in a part of the annular member 97 in the circumferential direction, the support piece 99 that extends from the inner peripheral surface where the first cylindrical portion 87 and the second cylindrical portion 89 are continuous to the inside of the second cylindrical portion 89. Can also be provided. According to this, since the annular member 97 can be held on the inner cylinder part 27 by inserting the support piece 99 into the opening end 33 of the inner cylinder part 27, the protrusion 91 is not necessary.

DESCRIPTION OF SYMBOLS 11 Waterproof connector 13 Male connector 15 Female connector 17 Male terminal 19 Female terminal 21, 57 Electric wire 23 Male housing (1st housing)
27 inner cylinder part 29 outer cylinder part 31 male terminal accommodating chamber 33 open end 41 annular member 49 female housing (second housing)
61 Main part 63 Hood part 65 Female terminal accommodating chamber 67 Open end 91 Projection part

Claims (3)

A cylindrical portion open end of the terminal accommodating chamber for accommodating a terminal of the first housing is formed, is opposed to the second terminal accommodating chamber cylindrical portion open end is formed in to accommodate the terminal housing, these The waterproof structure of the connector that seals the gap between the opposite ends of the opening edge of the
An annular member made of an elastic material is sandwiched between the cylindrical ends of the first housing and the second housing,
The annular member includes an umbrella-shaped first annular portion formed to expand toward the tube end of the first housing , and an umbrella shape formed to expand toward the tube end of the second housing. A second annular portion,
Umbrella-shaped base end portions of the first annular portion and the second annular portion are formed coaxially and connected back to back, and an inner method of the base end portion is the first housing and the second housing. Is formed smaller than the outer method of the opposite cylinder ends,
The circumference edge of the tube end first annular portion inner circumferential surface before Symbol first housing is in contact, of the tube end of the second annular portion inner circumferential surface before Symbol second housing waterproof structure for a connector outer peripheral corner portion formed by contact. The first housing has an outer cylindrical portion formed so as to surround an outer peripheral surface of the cylindrical portion and extend from a distal end of the cylindrical portion, and the first housing includes an umbrella-shaped base end portion of the annular member. A recess is formed along the circumferential direction of the inner surface of the outer cylinder portion corresponding to the position,
2. The waterproof structure for a connector according to claim 1, wherein the annular member is formed with a protruding portion that protrudes from an outer peripheral surface of the base end portion of the umbrella shape and can be engaged with a recessed portion of the outer cylinder portion . The annular member is a first support piece extending from the inner peripheral surface of the base end portion of the first annular portion to the inside of the cylindrical portion of the second housing, or the inner end of the base end portion of the second annular portion. The waterproof structure for a connector according to claim 1 , wherein a second support piece extending from a peripheral surface to the inside of the cylindrical portion of the first housing is formed .

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