JP2017050111A - Waterproof structure for connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof structure for a connector which can improve waterproof performance by preventing plastic deformation of the connector when fitting housings together, while allowing size reduction of the connector.SOLUTION: The present invention prevents water from entering openings 47 and 77 of cavities 29 and 69 in which terminals 21 and 23 are housed. The terminals are respectively formed on a pair of housings 17 and 19 fitted to each other. The pair of housings 17 and 19 are respectively provided, in a protruding manner, with resin annular members 51 and 81 surrounding the openings 47 and 77. An inner peripheral surface of one of the annular members is provided with a first annular protrusion 99 which comes into contact with an outer peripheral surface of the other one of the annular members. The outer peripheral surface of the other one of the annular members is provided with a second annular protrusion 107 which comes into contact with the inner peripheral surface of the former one of the annular members. The first protrusion 99 and the second protrusion 107 are arranged in such a manner that their positions are deviated from each other when the pair of housings are fitted together at the normal position.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a waterproof structure for a connector.

  Conventionally, waterproof connectors for connecting electric wires are mounted on automobiles and the like. For example, a female connector having a cylindrical inner housing formed with a cavity capable of accommodating a female terminal and a cylindrical outer housing surrounding the inner housing, and a cylindrical shape formed with a cavity capable of accommodating a male terminal 2. Description of the Related Art A connector is known that includes a male connector having a male housing and is formed by fitting both connectors.

  In this type of connector, an annular rubber packing is mounted on the outer peripheral surface of the inner housing of the female connector. When both connectors are mated, the male housing is inserted into the gap between the inner housing and the outer housing of the female connector, and the packing is in close contact with the outer peripheral surface of the inner housing and the inner peripheral surface of the male housing. It prevents water from entering the gap.

  However, this type of waterproof structure has a problem in that the outer diameter of the connector increases because a space for mounting the packing inside the female connector is required. On the other hand, as a waterproof structure that does not use packing, for example, an elastic resin sealing plate is provided on the inner surface of the female housing on the inner side, and when both connectors are mated, the cylinder tip in the mating direction of the male housing A structure is known in which water is prevented from penetrating against the annular seal plate of the female housing over the entire circumference (see, for example, Patent Document 1).

JP2013-229168A

  However, according to the waterproof structure of Patent Document 1, when the male housing is abutted against the seal plate, an excessive load may be generated on at least one of the two housings. For example, if the male housing is pressed against the seal plate when one of the housings has a dimensional error that exceeds a predetermined level or a foreign object adheres to the gap between the male housing and the seal plate, There is a risk that the plastic performance will be exceeded and the waterproof performance will be reduced.

  The present invention has been made in view of such problems, and is intended to improve the waterproof performance by preventing the plastic deformation of the connectors at the time of fitting between the housings, and to reduce the size of the connector. It is an object to provide a waterproof structure.

  In order to solve the above problems, a waterproof structure for a connector according to the present invention is a waterproof structure for a connector that prevents water from entering the openings of cavities in which terminals respectively formed in a pair of housings that fit together are accommodated. Each of the pair of housings is formed by projecting a resin-made annular member surrounding each opening, and an annular first member projecting to a position in contact with the outer circumferential surface of the other annular member is formed on the inner circumferential surface of one annular member. One protrusion is formed, and on the outer peripheral surface of the other annular member, an annular second protrusion that protrudes to a position in contact with the inner peripheral surface of the one annular member is formed. The two protrusions are characterized in that the positions of the two housings are shifted when the pair of housings are fitted to the normal positions.

  According to this, a waterproof structure is formed in the gap between the annular members by forming the first protrusion and the second protrusion on the inner peripheral surface of one annular member and the outer peripheral surface of the other annular member, respectively. Can do. Moreover, the depth length of a waterproof structure can be set long by providing the position of a 1st protrusion and a 2nd protrusion shifting. Thereby, it can prevent that water permeates into an opening via the clearance gap between annular members.

  In addition, at least one of the first protrusion and the second protrusion is set to a height at which the inner peripheral surface or the outer peripheral surface of the other annular member is pressed, so that, for example, one annular member is placed on the other annular member. It is pressed and elastically deformed, and the other annular member is pressed by the restoring force of the elastic deformation at this time. By pressing the annular members within the elastic limit in this way, plastic deformation does not occur, water can be prevented from entering between the annular members, and the waterproof performance of the connector can be improved. . Further, since the annular members are in direct contact with each other, it is not necessary to provide a rubber packing inside the connector, and no packing space is required, so that the connector can be downsized.

  In this case, either one of the first protrusion and the second protrusion is formed in a shape that regulates the movement in the other pulling direction when the pair of housings are fitted to the normal position. Is preferred. According to this, the state in which the annular members are overlapped with each other can be maintained, so that the waterproofness between the annular members can be kept high.

  Specifically, when one of the first protrusion and the second protrusion is formed with a cross section in the width direction having a plurality of peaks, and when the pair of housings are fitted to the normal position, It is preferable that the other is located in the valley part between adjacent peak parts.

  According to this, since the first protrusion and the second protrusion can be engaged with each other, for example, even when the connector vibrates, the pair of annular members expand and contract integrally, and the waterproofness between the annular members decreases. Can be prevented.

  In addition, one of the first protrusion and the second protrusion is formed at the base end portion of the annular member, and the other has a shape that presses midway from the base end portion of the annular member toward the tip end portion. Preferably it is formed. According to this, when the annular members are overlapped with each other, the other does not get over the other, so that the fitting load (insertion load) when fitting the pair of housings can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the waterproof performance by preventing the plastic deformation of the connector at the time of fitting of housings, the waterproof structure of the connector which enables size reduction of a connector can be provided.

It is a disassembled perspective view of the connector of 1st Embodiment. It is the figure which looked at the connector of Drawing 1 from the back side of a female connector. It is an external appearance perspective view of a male connector. It is a front view of the male housing which comprises the male connector of FIG. It is an external appearance perspective view of a female connector. It is AA arrow sectional drawing of FIG. It is the elements on larger scale of FIG. It is an operation | movement figure before fitting of a male connector and a female connector. FIG. 8 is an enlarged view of another main part corresponding to FIG. 7. It is a principal part enlarged view of 2nd Embodiment. It is a principal part enlarged view of 3rd Embodiment.

(First embodiment)
A first embodiment of a waterproof structure for a connector to which the present invention is applied will be described below with reference to FIGS. In this embodiment, a waterproof connector mounted on an automobile or the like will be described as an example. However, the connector of the present invention can also be applied to connectors for other uses.

  As shown in FIGS. 1 and 2, the connector 11 of the present embodiment includes a male connector 13 and a female connector 15, and a male housing 17 of the male connector 13 and a female housing 19 of the female connector 15 are fitted to each other. Thus, the male terminal 21 accommodated in the male housing 17 and the female terminal 23 accommodated in the female housing 19 are electrically connected. An electric wire 25 is connected to the male terminal 21, and an electric wire 27 is connected to the female terminal 23. The female housing 19 is fitted inside the male housing 17 and locked. In this embodiment, an example in which two terminals are accommodated in each connector will be described. However, the number of terminals accommodated is not limited to two. In the following description, the X direction in FIG. 1 is defined as the front-rear direction, the Y direction is defined as the width direction, the Z direction is defined as the height direction, the fitting direction of both connectors is defined as the front, and the upper side in FIG. Define.

  The male connector 13 has a male housing 17 formed in a cylindrical shape with an insulating synthetic resin, and a male terminal 21 accommodated in the male housing 17 from behind. As shown in FIGS. 3 and 6, the male housing 17 includes a cylindrical base 31 in which a male terminal accommodating chamber 29 (cavity) in which the male terminal 21 is accommodated, and an electric wire holding member that protrudes backward from the base 31. A portion 33 and a hood portion 35 protruding forward from the base portion 31 are integrally provided. The hood part 35 is formed to have a peripheral wall that is continuous with the peripheral wall of the base part 31, and a cross section orthogonal to the axial direction is formed in an oval cylindrical shape whose longitudinal direction is the width direction.

  As shown in FIG. 3, a guide groove 37 extending in the axial direction is formed on the inner wall of the hood portion 35. A wall portion 39 that rises in a plate shape flush with the front end surface of the hood portion 35 has a pair of first cutout portions 41 and a second cutout portion 43 formed inside the pair of first cutout portions 41. Is provided.

  The male terminal accommodating chamber 29 divides and accommodates two male terminals 21 with a partition wall (not shown), and engages each male terminal 21 with a lance (not shown) extended into the male terminal accommodating chamber 29. It is held at the set position. As shown in FIGS. 4 and 6, the male terminal housing chamber 29 has an opening 47 that opens in the front end surface 45 of the base portion 31 surrounded by the hood portion 35, and a through hole 49 that penetrates the electric wire holding portion 33 in the axial direction. Are formed in communication with each other. A cylindrical male-side annular member 51 that projects forward from the periphery of the opening 47 of the base portion 31 so as to surround the opening 47 is provided inside the hood portion 35.

  As shown in FIG. 3, the male housing 17 has a lock arm 53 that is extended in a cantilevered manner in the axial direction along the outer surface. The lock arm 53 includes two leg portions 57 respectively supported by a pair of wall portions 55 erected upward from both side surfaces of the base portion 31 in the width direction, and a base end portion connecting these leg portions 57 in the width direction. 59 and an arm portion 61 extending forward from the base end portion 59.

  The lock arm 53 is configured such that the front end portion of the arm portion 61 can be displaced upward from the horizontal direction with the base end portion 59 as a fulcrum. As shown in FIG. 6, a lock portion 63 that protrudes downward is provided at the lower front end of the arm portion 61. As shown in FIG. 3, the wall portion 55 surrounds the lock arm 53 and is provided from the base portion 31 of the male housing 17 to the wall portion 39 of the hood portion 35. The upper end surface of the lock arm 53 is set to the same height as the upper end surfaces of the wall portions 39 and 55 or lower than that.

  As shown in FIG. 1, the male terminal 21 is formed of a conductive metal plate or the like, and an electric wire connection portion 65 that crimps and connects the core wire of the electric wire 25 and a male tab 67 that is connected to the female terminal 23 are integrated. In preparation. The male tab 67 extends in the front-rear direction and is formed in a rod shape. The male tab 67 protrudes from the opening end 45 in a state where the male terminal 21 is held at the set position of the male terminal accommodating chamber 29, and the front end of the male-side annular member 51. It is provided to extend further forward.

  On the other hand, as shown in FIG. 1, the female connector 15 has a female housing 19 formed in a cylindrical shape with an insulating synthetic resin, and female terminals 23 accommodated in the female housing 19 from the rear. As shown in FIGS. 5 and 6, the female housing 19 has two cross sections orthogonal to the axial direction that are substantially similar to the inner peripheral surface of the hood portion 35 of the male housing 17 and into which the female terminal 23 is inserted. The base portion 71 in which the female terminal accommodating chamber 69 (cavity) is formed and the electric wire holding portion 73 projecting rearward from the base portion 71 are integrally formed. The female terminal accommodation chamber 69 is formed by partitioning the two female terminals 23 with a partition wall (not shown), and engages each female terminal 23 with a lance (not shown) extended into the female terminal storage chamber 69. It is held at the set position.

  As shown in FIGS. 5 and 6, the female terminal accommodating chamber 69 is formed by communicating an opening 77 that opens to the front end surface 75 of the base 71 and a through hole 79 that penetrates the electric wire holding portion 73 in the axial direction. The The base 71 is provided with a cylindrical female-side annular member 81 that protrudes forward from the front end surface 75 so as to surround the opening 77 from the periphery of the opening 77. The female-side annular member 81 is formed to have an outer peripheral surface 81a in which the outer peripheral surface of the base 71 is made smaller in a stepped shape.

  As shown in FIG. 5, the female housing 19 has a pair of protrusions 83 extending in the axial direction from the upper surface of the base 71, and a step 85 extending in the axial direction from the lower surface of the base 71 as shown in FIG. Provided. The pair of protrusions 83 are provided away from each other in the width direction, and can contact the inner peripheral surface of the male housing 17. A locking portion 87 that protrudes upward is provided inside the pair of protrusions 83. The locking portion 87 is formed with an inclined surface 89 that is inclined downward toward the front base 71, and pushes the lock arm 53 of the male housing 17 along the inclined surface 89 when the two housings are fitted together. ing.

  As shown in FIG. 1, the female terminal 23 is formed of a conductive metal plate or the like, and a rectangular tube into which a wire connecting portion 91 for crimping and connecting a core wire of the electric wire 27 and a male tab 67 of the male terminal 21 are inserted and connected. And an electric contact portion 93 having a shape. The electrical contact portion 93 is provided with a tip portion at a position that is flush with the opening 77 of the base 71 or a set distance from the opening 77 with the female terminal 23 held at the set position of the female terminal accommodating chamber 69. .

  Next, the male side annular member 51 and the female side annular member 81 which are the characteristic parts of this embodiment will be described. In the present embodiment, the female annular member 81 is fitted into the male annular member 51 when the male housing 17 and the female housing 19 are fitted together. FIG. 7 is an enlarged view of the frame in FIG.

  The male-side annular member 51 is a resin member that extends in a cylindrical shape from the periphery of the opening 47 of the base 31 of the male housing 17, and has higher elasticity than the female-side annular member 81. The male side annular member 51 is formed in an oval cylindrical shape having a cross section perpendicular to the axial direction of the male housing 17 as a longitudinal direction in the width direction, and has an inner peripheral surface 95 and an outer peripheral surface 97 extending in the axial direction of the male housing 17. Have. The inner peripheral surface 95 has an annular first protrusion 99 that protrudes to a position in contact with the outer peripheral surface 105 of the female-side annular member 81, and the first protrusion 99 extends in the width direction (axis Direction) is formed in an arc shape. A guide surface 101 is formed on the inner peripheral surface of the distal end of the male side annular member 51 so as to incline in a direction away from the opposing female side annular member 81 and widen forward. The guide surface 101 guides the female side annular member 81 to the inside of the male side annular member 51.

  The female-side annular member 81 is a resin member that extends in a cylindrical shape from the periphery of the opening 77 of the base 71 of the female housing 19, and has higher rigidity than the male-side annular member 51. The female annular member 81 has an inner peripheral surface 103 and an outer peripheral surface 105 that extend in the axial direction of the female housing 19. The outer peripheral surface 105 has an annular second protrusion 107 that protrudes to a position in contact with the inner peripheral surface 95 of the male annular member 51.

  As shown in FIG. 7, the second protrusion 107 is formed to have two crests 109a and 109b, and the cross section in the width direction has a sinusoidal curved surface that alternately repeats the crest 109 and the trough 111. Formed without. The crests 109a and 109b protrude to a position where they contact the inner peripheral surface 95 of the male-side annular member 51. When the male housing 17 and the female housing 19 are fitted to the normal position, the first protrusions respectively. It is arranged at a position shifted from 99. In this case, the first protrusion 99 is disposed at the position of the valley portion 111 between the adjacent peak portions 109a and 109b so that both sides in the width direction are in contact with the peak portions 109a and 109b of the outer peripheral surface 105, respectively. It has become.

  In the present embodiment, as shown in FIG. 7, the internal dimension between the inner peripheral surfaces 95 facing the height direction of the male-side annular member 51 is L1, and the second protrusion 107 (mountain portion) of the female-side annular member 81 is used. When the outer dimension between the tops of 109a and 109b) is L2, L1 is set smaller than L2. This dimensional relationship is set over the entire circumference of the male side annular member 51 and the female side annular member 81. Therefore, when the second projecting portion 107 of the female annular member 81 is brought into contact with the inner peripheral surface 95, the inner peripheral surface 95 is pressed against the second projecting portion 107, and the male side annular member 51 It is designed to be spread outward.

  Next, an example of the assembly method and fitting operation of both housings will be described. First, as shown in FIG. 1, the male terminal 21 to which the electric wire 25 fitted with the rubber plug 109 is connected is accommodated together with the rubber plug 109 in the male terminal accommodating chamber 29 of the male housing 17. Further, the female terminal 23 to which the electric wire 27 equipped with the rubber plug 111 is connected is accommodated in the female terminal accommodating chamber 69 of the female housing 19 together with the rubber plug 111. In this state, as shown by the arrow in FIG. 8, the female housing 19 of the female connector 15 is inserted into the male housing 17 of the male connector 13.

  When the female housing 19 is inserted into the male housing 17, the pair of protrusions 83 of the female housing 19 pass through the first cutouts 41 of the male housing 17, and the locking portion 87 of the female housing 19 is the male housing 17. Passes through the second notch 43. Further, the stepped portion 85 of the female housing 19 is guided along the guide groove 37 of the male housing 17.

  Subsequently, when the insertion of the female housing 19 proceeds, the lock arm 53 of the male housing 17 rides on the locking portion 87 along the inclined surface 89 of the locking portion 87 of the female housing 19, and the arm portion 61 moves upward. Deforms and deforms. Then, when the lock part 63 of the arm part 61 gets over the locking part 87, the arm part 61 is elastically restored. Thereby, the latching | locking part 87 is latched by the lock | rock part 63, and both housings are locked in a regular fitting state.

  On the other hand, when the female-side annular member 81 is inserted into the male-side annular member 51, the second protrusion 107 guided inward along the guide surface 101 of the male-side annular member 51 As shown in FIG. 7, the first projecting portion 99 is positioned between the crest portions 109a and 109b, and the inner peripheral surface 95 is pressed over the entire circumference and stopped still. The male-side annular member 51 pressed by the second protrusion 107 is elastically deformed in the direction in which the front end portion extends outward, and the elastic restoring force generated at this time presses the female-side annular member 81. Thereby, the male side annular member 51 and the female side annular member 81 are in contact with each other in a watertight manner over the entire circumference, and prevent water from entering the opening 47 of the male connector 13 and the opening 77 of the female connector 15, respectively. When the housings 17 and 19 are fitted together, the front end surface of the male side annular member 51 and the female housing 19 are arranged apart from each other, and the front end surface of the female side annular member 81 and the male housing 17 are arranged apart from each other. Is done.

  As described above, in the present embodiment, when the male connector 13 and the female connector 15 are fitted together, the male side annular member 51 having elasticity is pressed from the inside by the female side annular member 81 having relatively high rigidity. Therefore, the gap between the male-side annular member 51 and the female-side annular member 81 is sealed without plastic deformation. Therefore, water can be prevented from entering the openings 47 and 77, and the waterproofness of the connector 11 can be improved. Further, since the male side annular member 51 and the female side annular member 81 are directly brought into contact with each other and sealed, a waterproof rubber packing or the like is unnecessary, and the internal space of the connector 11 can be reduced. Moreover, cost reduction can be realized.

  Further, in the present embodiment, in the waterproof structure of the gap between the male-side annular member 51 and the female-side annular member 81, the first protrusion 99 and the second protrusion 107 are provided with their positions shifted from each other. The depth length of can be increased. Thereby, since the waterproof function of a waterproof structure can be improved, it can prevent more effectively that water permeates into opening 47,77.

  In the present embodiment, when the male-side annular member 51 and the female-side annular member 81 are fitted to the proper positions, the first protrusion 99 is formed by the two peaks 109 a and 109 b of the second protrusion 107. Therefore, the relative movement in the axial direction (front-rear direction) between the female-side annular member 81 and the male-side annular member 51 can be restricted, and the overlapping state can be maintained. it can. Therefore, for example, when the connector 11 vibrates, the male-side annular member 51 and the female-side annular member 81 expand and contract integrally so that vibrations can be absorbed from each other. It is possible to prevent deterioration with the passage of time and water resistance.

  In the present embodiment, when the male housing 17 is inserted into the female housing 19, the pair of protrusions 83 are brought into contact with the inner peripheral surface of the male housing 17 and the stepped portion 85 is a guide for the male housing 17. Guided along the groove 37. Accordingly, the relative displacement between the male housing 17 and the female housing 19 is suppressed, and the female-side annular member 81 can be brought into contact with the set position of the male-side annular member 51 at a predetermined angle. , 81 can be overlapped at an appropriate position, and the waterproofness can be stabilized.

  In this embodiment, when the male connector 13 and the female connector 15 are fitted, the front end portion of the female side annular member 81 inserted into the male side annular member 51 is not in contact with the front end surface 45 of the male housing 17. In the example described above, the front end portion of the male annular member 51 is set so as not to contact the front end surface 75 of the female housing 19. It can also be formed so as to be in contact with the side housing (for example, the front end faces 45 and 75). As a result, the distal end portion of any one of the annular members functions as a stopper by abutting against the counterpart housing, so that the relative movement between the male side annular member 51 and the female side annular member 81 is stopped and the annular member 51 is stopped. , 81 can be prevented from being damaged due to excessive pressing. Moreover, since the contact area of both housings can be increased, waterproofness can also be improved.

  In this embodiment, although the 2nd protrusion 107 of the female side annular member 81 demonstrated the example which presses the male side annular member 51 with the appearance engaged with the 1st protrusion 99 of the male side annular member 51, the 1st The positions of the first protrusion 99 and the second protrusion 107 can be changed. That is, as shown in FIG. 9, the first protrusion 99 is formed on the outer peripheral surface 105 of the female-side annular member 81, and the second protrusion 107 is formed on the inner peripheral surface 95 of the male-side annular member 51. Even if comprised in this way, the effect similar to the case of FIG. 7 can be acquired. In this embodiment, the example in which the female-side annular member 81 is inserted into the male-side annular member 51 has been described. Instead, the male-side annular member 51 is configured to be inserted into the female-side annular member 81. You can also.

  In the following, other embodiments in which the present invention is implemented will be described. However, each of these embodiments is basically the same as the first embodiment. Therefore, hereinafter, only a characteristic configuration and effects of each embodiment will be described, and description of a configuration common to the first embodiment will be omitted.

(Second Embodiment)
FIG. 10 is an enlarged view of a main part of the second embodiment corresponding to FIG. The difference between the waterproof structure of the connector of the present embodiment and the waterproof structure of the connector of the first embodiment (FIG. 7) is that when the male housing 17 and the female housing 19 are fitted to the normal position, the male side annular shape is obtained. With respect to the annular first protrusion 113 protruding from the inner peripheral surface 95 of the member 51, the annular second protrusion 115 protruding from the outer peripheral surface 105 of the female-side annular member 81 is pulled out of the male-side annular member 51. It is in being formed only in.

  The first protrusion 113 is formed in a trapezoidal cross section in the width direction, and protrudes to a position in contact with the outer peripheral surface 105 of the female-side annular member 81. The first protrusion 113 is provided at the front end of the male annular member 51 and is formed in a shape that restricts the movement of the second protrusion 115 in the pulling direction (left direction in FIG. 10). An inclined surface that extends along the guide surface 101 is formed in front of the first protrusion 113.

  The second protrusion 115 is formed in a trapezoidal cross section in the width direction and protrudes to a position where it contacts the inner peripheral surface 95 of the male side annular member 51. The second protrusion 115 is disposed behind the first protrusion 113 of the male-side annular member 51 when the male housing 17 and the female housing 19 are fitted to the normal position, and the first protrusion 113 is pulled out. It is formed in a shape that restricts movement in the direction (right direction in FIG. 10). In the present embodiment, the second protrusion 115 is formed to be inclined rearward of the female-side annular member 81, that is, toward the first protrusion 113, and the male housing 17 and the female housing 19 are fitted to a normal position. The corners 117 in the direction inclined when pressed are configured to press the first protrusions 113.

  The second protrusion 115 has an inclined surface 119 that is inclined from the top thereof toward the front of the female-side annular member 81. Thereby, when the male housing 17 and the female housing 19 are fitted together, the second protrusion 115 rides on the second protrusion 115 along the inclined surface 119, and the second protrusion 115 It is possible to get over the section 115. Note that the first protrusion 113 that has passed over the second protrusion 115 has the corner 117 of the second protrusion 115 in contact with the rear thereof, so that even if an external force is applied in the pulling direction, the second protrusion 115 is not affected. I can't get over easily.

  In the present embodiment, the first protrusion 113 and the second protrusion 115 are positioned in the direction in which the annular members 51 and 81 are pulled out from each other, and the first protrusion 113 and the second protrusion 115 are respectively opposite to each other. Since it is formed in a shape that restricts the movement in the drawing direction, it is possible to reliably maintain the state where the male side annular member 51 and the female side annular member 81 overlap each other. Therefore, the adhesiveness between the male side annular member 51 and the female side annular member 81 is ensured, and it is possible to continuously prevent water from entering the openings 47 and 77.

  Also in the present embodiment, in the waterproof structure of the gap between the male-side annular member 51 and the female-side annular member 81, the positions of the first protrusion 113 and the second protrusion 115 are shifted to provide a waterproof structure. Since the depth length can be increased, the waterproof property of the gap between the male-side annular member 51 and the female-side annular member 81 can be enhanced.

(Third embodiment)
FIG. 11 is an enlarged view of a main part of the third embodiment corresponding to FIG. The difference between the waterproof structure of the connector of the present embodiment and the waterproof structure of the connector of the first embodiment (FIG. 7) is that when the male housing 17 and the female housing 19 are fitted to the normal position, the male side annular shape is obtained. The annular second projection 121 projecting from the outer circumferential surface 105 of the female-side annular member 81 is opposite to the annular first projection 99 projecting from the inner circumferential surface 95 of the member 51. It is that it is formed only on the opposite side.

  The 1st protrusion 99 is formed in the shape similar to 1st Embodiment. The second protrusion 121 is formed by protruding the base end portion on the back side of the outer peripheral surface 105 of the female-side annular member 81 to a position where it contacts the inner peripheral surface 95 of the male-side annular member 51. The 2nd protrusion 121 has the inclined surface 123 which inclines toward the outer peripheral surface 105 from the top part.

  In the present embodiment, as shown in FIG. 11, when the male housing 17 and the female housing 19 are fitted to the regular position, the first protrusion 99 is the second of the outer peripheral surface 105 of the female-side annular member 81. It is set such that the middle of the projection 121 (base end) is pressed toward the front end, and the second projection 121 presses the front end of the inner peripheral surface 95 of the male side annular member 51.

  In the present embodiment, as in each of the above-described embodiments, the structure in which the male-side annular member 51 and the female-side annular member 81 are restrained from moving in the pulling direction is different. When the housing 19 is fitted, the movement of the first protrusion 99 and the second protrusion 121 to the stationary position becomes smooth, so the insertion load when the female housing 19 is inserted into the male housing 17 is reduced. Therefore, workability at the time of assembling the connector 11 can be improved.

  Also in this embodiment, in the waterproof structure of the gap between the male-side annular member 51 and the female-side annular member 81, the positions of the first protrusion 99 and the second protrusion 121 are shifted to provide a waterproof structure. Since the depth length can be increased, the waterproof property of the gap between the male-side annular member 51 and the female-side annular member 81 can be enhanced.

DESCRIPTION OF SYMBOLS 11 Connector 13 Male connector 15 Female connector 17 Male housing 19 Female housing 21 Male terminal 23 Female terminal 29 Male terminal accommodation chamber (cavity)
47, 77 Opening 51 Male annular member 69 Female terminal accommodating chamber (cavity)
81 Female-side annular member 95,103 Inner peripheral surface 97,105 Outer peripheral surface 99,113, first protrusion 107,115,121 second protrusion

Claims (4)

In the waterproof structure of the connector that prevents water from entering the openings of the cavities in which the terminals respectively formed in the pair of housings that fit together are accommodated,
Each of the pair of housings is formed by projecting a resin annular member surrounding the opening,
An annular first protrusion is formed on the inner peripheral surface of the one annular member so as to protrude to a position in contact with the outer peripheral surface of the other annular member. An annular second protrusion protruding to a position in contact with the inner peripheral surface of the annular member is formed,
The waterproof structure for a connector, wherein the first protrusion and the second protrusion are arranged so as to be displaced from each other when the pair of housings are fitted to a normal position.   Either one of the first protrusion and the second protrusion is formed in a shape that restricts the movement in the other pull-out direction when the pair of housings are fitted to a normal position. The waterproof structure of the connector according to claim 1, wherein the connector is waterproof.   Either one of the first protrusion and the second protrusion is formed so that a cross section in the width direction has a plurality of ridges, and the pair of housings are adjacent to each other when they are fitted to a normal position. The waterproof structure for a connector according to claim 2, wherein the other is located in a trough between the fitting ridges.   One of the first protrusion and the second protrusion is formed at the base end of the annular member, and the other presses the intermediate member from the base end toward the tip. The waterproof structure of the connector according to claim 1, wherein the waterproof structure is formed in a shape.

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