JP6224041B2 - Connector waterproof structure - Google Patents

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. The pair of housings are formed so that resin-made annular members projecting around the respective openings can be fitted to each other , and one of the fitting surfaces of the annular members is formed flat along the fitting direction, and the other In the middle of the fitting direction, a ridge is formed over the entire circumference, the top of the ridge is formed so as to press one of the fitting surfaces, and the annular member having the fitting surface formed with the ridge is flat. The annular member having a fitting surface formed with a higher rigidity than the annular member having a fitting surface is formed to be more elastic than the annular member having a fitting surface formed with a protrusion. characterized in that it comprises

According to this, when a pair of housings are fitted, the annular members formed in the respective housings are overlapped with each other via the protrusions , and the annular member having a flat fitting surface is projected. by being pressed elastically deformed by the annular member having a top portion of the strip, the top of the ridge is kicked with push fitting surface opposed by the elastic restoring force of the annular member having a mating surface which is flat. In particular, an annular member having a fitting surface formed with a protrusion is higher in rigidity than an annular member formed flat and having a fitting surface, and the annular member having a fitting surface formed flat has a protrusion. Since the elastic member is formed to be more elastic than the annular member having the fitting surface formed, the annular member having a fitting surface that is elastic and has a fitting surface is formed with a relatively rigid protrusion. It is pressed by an annular member having a mating surface and is expanded, for example, within an elastic limit. As a result, the elastic restoring force of the annular member formed flat and having the fitting surface strongly presses the top of the protrusion against the opposing fitting surface, thereby improving the sealing performance of the gap between the pair of annular members. . In this way, the pair of annular members that are fitted to each other are pressed against each other within the elastic limit, so that water can be prevented from entering the opening without causing plastic deformation, and the waterproofness of the connector is improved. be able to. Further, since the annular members are in direct contact with each other, it is not necessary to provide a space for providing rubber packing inside the connector, so that the connector can be downsized.

  By the way, when the annular members are brought close to each other in a state where the inner peripheral surface and the outer peripheral surface of the pair of annular members are in contact with each other, a large friction is generated between the inner peripheral surface and the outer peripheral surface, The insertion load at the time of insertion into the housing increases.

  In this respect, in the present invention, since the protrusion is formed over the entire circumference on the way from the tip of one of the annular members, the area where the annular members are in contact with each other is limited to the top of the protrusion. Thereby, the friction between the annular members can be reduced and the insertion load of the housing can be reduced, so that the assembly workability of the connector can be improved.

  In this case, it is preferable that the top portion is formed in an arc shape in a cross section orthogonal to the circumferential direction of the top portion. According to this, since the contact area between the annular members can be reduced, the friction between the annular members can be further reduced.

  Moreover, it is preferable that a protrusion has an inclined surface which inclines toward the front-end | tip side of the annular member in which this protrusion was formed from the top part. According to this, when the pair of housings are fitted, the other annular member rides along the inclined surface of the projection of the one annular member, so that plastic deformation and damage due to contact between the annular members are surely prevented. be able to.

  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 other embodiment corresponding to FIG.

(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 front end face 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 provided with an inclined surface 89 that is inclined downward toward the front base 71, and pushes up the lock arm 53 of the male housing 17 along the inclined surface 89 when the two housings are fitted together. Yes.

  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 characteristic configuration of the present 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 an inner peripheral surface 95 and an outer peripheral surface 97 extending in parallel with the axis of the male housing 17. And has a uniform thickness in the axial direction. On the inner peripheral surface of the distal end of the male-side annular member 51, an inclined surface 99 that is inclined in a direction away from the opposing female-side annular member 81 and widens forward is formed. The inclined surface 99 guides the female-side annular member 81 into 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-side annular member 81 has an inner peripheral surface 101 and an outer peripheral surface 103 that extend in parallel with the axis of the female housing 19, and an annular protrusion that protrudes from the front end (front end) of the outer peripheral surface 103 toward the back. Part 105. The protrusion 105 has a cross section orthogonal to the circumferential direction formed in an arc shape around the top portion 107 that contacts the inner peripheral surface 95 of the male annular member 51 over the entire circumference. In addition, the protrusion amount which protrudes from the front end surface 75 of the female side annular member 81 in the axial direction is set shorter than the protrusion amount which protrudes from the front end surface 45 of the male side annular member 51 in the axial direction.

  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 protrusions facing the height direction of the female side annular member 81 When the outer dimension between the tops of 105 is L2, L1 is set smaller than L2, and 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 protruding portion 105 of the female-side annular member 81 is brought into contact with the inner peripheral surface 95, the male-side annular member 51 is pressed outward against the top portion 105 and is spread outward over the entire periphery. It is like that.

  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 108 is connected is accommodated together with the rubber plug 108 in the male terminal accommodating chamber 29 of the male housing 17. Further, the female terminal 23 to which the electric wire 27 fitted with the rubber plug 110 is connected is accommodated together with the rubber plug 110 in the female terminal accommodation chamber 69 of the female housing 19. 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 protrusion 105 guided inward along the inclined surface 99 of the male-side annular member 51 is formed on the inner peripheral surface of the male-side annular member 51. As shown in FIG. 7, the top portion 107 of the projection 105 is stopped in such a manner as to press the inner peripheral surface 95 over the entire circumference. The male-side annular member 51 pressed by the protrusion 105 is elastically deformed in the direction in which the distal 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 brought into watertight contact over the entire circumference, and as a result, water can be prevented from entering the opening 47 of the male connector 13 and the opening 77 of the female connector 15, respectively. be able to. 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. Has been.

  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, and water is prevented from entering the openings 47 and 77 without causing plastic deformation. The waterproof performance can be improved. Moreover, 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 rubber packing or the like for ensuring watertightness is not required, and the connector internal space can be set small. The connector 11 can be reduced in size and cost.

  Further, the male side annular member 51 is formed with elasticity (spring property) and is pressed against the female side annular member 81 over the entire circumference, so that excessive deformation is suppressed, and plastic deformation of the connector 11 is performed. And can prevent damage. Furthermore, even if the distance between the annular members 51 and 81 is displaced by the vibration propagated to the connector 11, the male annular member 51 is elastically deformed while being in contact with the protrusion 105 of the female annular member 81. Further, it is possible to absorb vibrations between the annular members and to suppress the deterioration of the connector 11 with time due to the vibrations.

  In addition, in this embodiment, the protrusion 105 is formed on the way from the tip of the female annular member 81 to the back, so that the range where the male annular member 51 contacts the female annular member 81 is reduced. It can be limited to the top portion 107, and the friction between the female-side annular member 81 and the male-side annular member 51 can be reduced. Thereby, since the insertion load at the time of inserting the female housing 19 in the male housing 17 can be reduced, the workability | operativity at the time of the assembly of the connector 11 can be improved.

  In the present embodiment, when the female housing 19 is inserted into the male housing 17, 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 formed on the male housing 17. Guided along the guide 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. Adhesion can be improved and waterproofness can be stabilized.

  In the present embodiment, when the male connector 13 and the female connector 15 are fitted, the front end portion of the female annular member 81 inserted into the male 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). According to this, since the tip portion of any one of the annular members functions as a stopper by contacting the counterpart housing, the relative movement between the male side annular member 51 and the female side annular member 81 is stopped, It is possible to prevent damage or the like due to excessive pressing between the annular members. Moreover, since the contact area of both housings can be increased, waterproofness can also be improved.

  Further, in the present embodiment, the example in which the protrusion 105 formed on the female-side annular member 81 presses the inner peripheral surface 95 of the male-side annular member 51 has been described. Instead, the male side annular member 51 can be formed. That is, for example, as shown in FIG. 9, the outer peripheral surface 103 of the female-side annular member 81 is configured to press the protrusion 105 formed on the inner peripheral surface 95 of the male-side annular member 51 over the entire periphery. Also good. 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 inserted into the female-side annular member 81. It can also be configured. In this case, the protrusion 105 is formed on either the outer peripheral surface 97 of the male annular member 51 or the inner peripheral surface 101 of the female annular member 81.

(Second Embodiment)
Next, a second embodiment in which the present invention is implemented will be described with reference to the drawings. However, this embodiment is basically the same as the first embodiment. Therefore, hereinafter, only the characteristic configuration of the present embodiment will be described, and description of the configuration common to the first embodiment will be omitted.

  FIG. 10 is an enlarged view of a main part of the present embodiment corresponding to FIG. The difference between the waterproof structure of the connector according to the present embodiment and the waterproof structure of the connector according to the first embodiment (FIG. 7) is that a protrusion protruding from the outer peripheral surface 103 of the female-side annular member 81 as shown in FIG. 109 has a trapezoidal cross section perpendicular to the circumferential direction, and has an inclined surface 113 inclined from the top 111 that presses the inner peripheral surface 95 of the male annular member 51 toward the distal end side of the female annular member 81. There is in being.

  The protrusion 109 has an inclined surface 113, a rear end surface 115 that rises substantially perpendicularly from the outer peripheral surface 103 of the female annular member 81, and a top 111 that extends in a direction orthogonal to the circumferential direction of the protrusion 109. It is formed. The protrusion 109 is formed on the way from the tip of the female annular member 81 to the back, like the protrusion 105 of FIG. The inclined surface 113 is not limited to a linear cross section, and may be formed in an arc shape.

  The total area of the top 111 of the protrusion 109 that contacts the male annular member 51 is larger than the total area of the top 105 having an arcuate cross section where the protrusion 105 of FIG. 7 contacts the male annular member 51. . Thereby, the protrusion 109 according to the present embodiment can have higher strength (rigidity) than the protrusion 105 in FIG. 7 and is plastically deformed when the inner peripheral surface 95 of the male annular member 51 is pressed. Can be prevented. Therefore, since the adhesiveness between the male side annular member 51 and the female side annular member 81 is maintained, it is possible to continuously prevent water from entering the openings 47 and 77 and improve the waterproof performance of the connector 11. be able to.

  In addition, since the inclined surface 113 is formed over the entire circumference in front of the protrusion 109, the male-side annular member 51 can ride on the protrusion 109 along the inclined surface 113. Thereby, the impact when the male side annular member 51 contacts the female side annular member 81 is relieved, and plastic deformation and breakage of both annular members can be reliably prevented.

  Further, in the present embodiment, the example in which the protrusion 109 formed on the female-side annular member 81 presses the inner peripheral surface 95 of the male-side annular member 51 is described. Instead, the male side annular member 51 may be formed. That is, for example, as shown in FIG. 11, the outer peripheral surface 103 of the female side annular member 81 is configured to press the protrusion 109 formed on the inner peripheral surface 95 of the male side annular member 51 over the entire periphery. Also good. Even if comprised in this way, the effect similar to the case of FIG. 10 can be acquired.

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, 101 Inner peripheral surface 97, 103 Outer peripheral surface 105, 109 Protruding portion 107, 111 Top portion 113 Inclined surface

Claims (6)

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 so that resin-made annular members projecting around the openings can be fitted to each other ,
One of the fitting surfaces of the annular member is formed flat along the fitting direction, the other is formed with a ridge over the entire circumference in the middle of the fitting direction, and the top of the ridge is the one fitting surface Formed to press
The annular member having the fitting surface on which the protrusion is formed is higher in rigidity than the annular member having the fitting surface formed flat.
The waterproof structure for a connector, wherein the annular member having a fitting surface formed flat is formed to be more elastic than the annular member having a fitting surface on which the protrusions are formed . The waterproof structure for a connector according to claim 1, wherein the diameter of the flat fitting surface is uniform along the fitting direction. The waterproof structure for a connector according to claim 1, wherein the number of the protrusions is one. 4. The waterproof connector according to claim 1, wherein the top of the protrusion is formed in a semicircular arc shape or a flat cross section along the fitting direction of the protrusion. 5. Construction. The ribs can be any of claims 1 to 4, characterized by being formed by an inclined surface which is inclined toward the distal end side of the fitting surface of said protrusion is formed from the top The waterproof structure of the connector according to Item 1 . The dimensional relationship between the inner or outer dimension L1 of the flat fitting surface and the inner or outer dimension L2 of the top of the ridge is as follows:
When the annular member having the fitting surface on which the protrusion is formed is fitted into the annular member having the flat fitting surface, the inner dimension L1 <the outer dimension L2 is satisfied,
When the annular member having the flat fitting surface is fitted into the annular member having the fitting surface on which the protrusion is formed, the inner dimension L1> the outer dimension L2 is satisfied. The waterproof structure of the connector according to claim 2.

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