connector

Abstract

To provide a connector capable of minimizing an increase in insertion resistance while maintaining sealing properties. [Solution] The connector (10) includes a connector housing (30) that is inserted into a mounting hole (95) of a case (90) along an insertion direction (D2), and a seal member (70) that seals between the connector housing (30) and the mounting hole (95). The seal member (70) includes a first seal portion (71) having a first outer lip (74) that can be fitted closely to a first surface (96) of the inner circumferential surface of the mounting hole (95) that extends parallel to the insertion direction (D2). The seal member (70) includes a second seal portion (72) having a second outer lip (77) that can be fitted closely to the first surface (96) of the mounting hole (95), and a connecting portion (73) that connects the first seal portion (71) and the second seal portion (72). The first outer lip (74) and the second outer lip (77) each protrude radially outward from the outer circumferential surface of the connecting portion (73). The height of the second outer lip (77) is formed to be shorter than the height of the first outer lip (74).

Description

[Technical Field]

[0001] The present disclosure relates to connectors. [Background technology]

[0002] Conventionally, connectors that are attached to the case of an electrical device mounted on a vehicle are known (see, for example, Patent Document 1). This type of connector includes a connector housing that can be inserted into an attachment hole provided in the case. A seal member is attached to the outer periphery of the connector housing, sealing the gap between the attachment hole and the connector housing by closely contacting the inner circumferential surface of the attachment hole and the outer circumferential surface of the connector housing. The seal member has a first annular seal portion, a second annular seal portion spaced apart from the first seal portion, and a connecting portion connecting the first seal portion and the second seal portion. This allows the two seal portions, the first seal portion and the second seal portion, to seal the gap between the attachment hole and the connector housing. Therefore, even if the sealing ability of the first seal portion is reduced due to corrosion of the sealing surface of the case, the second seal portion can maintain the sealing ability. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-111575 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above connector, when the connector housing is inserted into the mounting hole, the seal member attached to the outer periphery of the connector housing enters the mounting hole, causing friction between the seal member and the mounting hole. This increases the insertion resistance of the connector into the mounting hole. Because the seal member has two seal portions, a first seal portion and a second seal portion, the insertion resistance of the connector into the mounting hole may increase significantly. Furthermore, an increase in the insertion resistance of the connector reduces the ease of inserting the connector housing into the mounting hole.

[0005] An object of the present disclosure is to provide a connector that can minimize an increase in insertion resistance while maintaining sealing performance. [Means for solving the problem]

[0006] The connector of the present disclosure comprises a connector housing that is inserted in an insertion direction into a mounting hole of a case to be mounted, and a sealing member that is attached to the outer periphery of the connector housing and seals between the connector housing and the mounting hole, the sealing member having a first sealing portion having a first annular outer lip that can be fitted closely to a first surface of the inner periphery of the mounting hole that extends parallel to the insertion direction, a second sealing portion that is spaced apart from the first outer lip and has a second annular outer lip that can be fitted closely to the first surface of the mounting hole, and a connecting portion that connects the first sealing portion and the second sealing portion, each of the first outer lip and the second outer lip protruding radially outward from the outer periphery of the connecting portion, and the height of the second outer lip is formed lower than the height of the first outer lip. [Effects of the Invention]

[0007] The connector of the present disclosure has the advantage of being able to minimize an increase in insertion resistance while maintaining sealing performance. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view showing a connector inserted into a mounting hole of a case according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view showing a connector before being inserted into a mounting hole of a case according to one embodiment. [Figure 3] FIG. 3 is a perspective view showing a case and a connector according to one embodiment. [Figure 4] FIG. 4 is an exploded perspective view showing a connector according to one embodiment. [Figure 5] FIG. 5 is an enlarged cross-sectional view of a portion of the connector according to the embodiment. [Figure 6] FIG. 6 is a graph showing the relationship between the insertion force and stroke of the connector when it is inserted into the mounting hole of the case in one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. [1] The connector of the present disclosure comprises a connector housing inserted in an insertion direction into a mounting hole of a case to be mounted, and a seal member attached to the outer periphery of the connector housing and sealing between the connector housing and the mounting hole, the seal member comprising: a first seal portion having a first annular outer lip that can be fitted closely to a first surface of the inner periphery of the mounting hole extending parallel to the insertion direction; a second seal portion that is spaced apart from the first outer lip and has a second annular outer lip that can be fitted closely to the first surface of the mounting hole; and a connecting portion that connects the first seal portion and the second seal portion, each of the first outer lip and the second outer lip protruding radially outward from the outer periphery of the connecting portion, and the height of the second outer lip is formed lower than the height of the first outer lip.

[0010] According to this configuration, the first seal portion having the first outer peripheral lip and the second seal portion having the second outer peripheral lip provide a double seal between the connector housing and the attachment hole, so that even if the sealing performance of the second seal portion is reduced due to corrosion of the sealing surface of the case, for example, the first seal portion can maintain an appropriate sealing performance between the connector housing and the attachment hole.

[0011] Furthermore, the height of the second outer lip is formed lower than the height of the first outer lip. This prevents an increase in friction between the second outer lip and the mounting hole when the second seal portion is inserted into the mounting hole. This effectively prevents an increase in the insertion resistance of the connector into the mounting hole due to the provision of the second seal portion. This effectively prevents an increase in the insertion force of the connector due to the provision of the second seal portion. As a result, it effectively prevents a decrease in the ease of inserting the connector into the mounting hole.

[0012] [2] In the above [1], a first dimension of the connecting portion along the insertion direction may be smaller than a second dimension of the second outer lip along the insertion direction, and may be larger than 1 / 2 the second dimension.

[0013] With this configuration, the first dimension of the connecting portion along the insertion direction is smaller than the second dimension of the second outer peripheral lip along the insertion direction, which effectively prevents the seal member from increasing in size in the insertion direction, and ultimately prevents the connector from increasing in size in the insertion direction.

[0014] [3] In the above [1] or [2], the first seal portion may have two of the first outer peripheral lips, and the second seal portion may have one of the second outer peripheral lips. According to this configuration, the second seal portion is provided with one second outer lip. This prevents the frictional force between the second outer lip and the mounting hole from increasing compared to when the second seal portion is provided with multiple second outer lips. This minimizes the increase in insertion resistance of the connector caused by providing the second seal portion.

[0015] [4] In the above [3], the first seal portion may have a recess provided between the tops of the two first outer lips, and the top of the second outer lip may be provided at a position radially inward from the top of the first outer lip and at a position radially outward from the bottom of the recess.

[0016] According to this configuration, the top of the second outer peripheral lip is positioned between the top of the first outer peripheral lip and the bottom surface of the recess in the height direction. [5] In the above [4], the connector housing may have an accommodating groove formed so as to be recessed radially inward from the outer peripheral surface of the connector housing, the seal member may be accommodated in the accommodating groove, the first seal portion may have a first inner peripheral lip that protrudes from the inner peripheral surface of the first seal portion toward the bottom surface of the accommodating groove and is capable of adhering to the bottom surface of the accommodating groove, and the second seal portion may have a second inner peripheral lip that protrudes from the inner peripheral surface of the second seal portion toward the bottom surface of the accommodating groove and is capable of adhering to the bottom surface of the accommodating groove.

[0017] According to this configuration, the seal member is accommodated in the accommodation groove. This allows for easy positioning of the seal member and effectively prevents misalignment of the seal member. Furthermore, a first inner circumferential lip is provided between the inner circumferential surface of the first seal portion and the bottom surface of the accommodation groove. This improves the sealing performance between the inner circumferential surface of the first seal portion and the bottom surface of the accommodation groove. Furthermore, a second inner circumferential lip is provided between the inner circumferential surface of the second seal portion and the bottom surface of the accommodation groove. This improves the sealing performance between the inner circumferential surface of the second seal portion and the bottom surface of the accommodation groove.

[0018] [6] In the above [5], the first seal portion has one of the first inner circumferential lips, the second seal portion has one of the second inner circumferential lips, the first inner circumferential lip is provided at a position overlapping with the recess in the axial direction of the seal member, and the second inner circumferential lip is provided at a position overlapping with the first outer circumferential lip in the axial direction.

[0019] According to this configuration, one first inner lip is provided for two first outer lips. Therefore, compared to when two first inner lips are provided for two first outer lips, the friction force between the first inner lip and the receiving groove can be prevented from increasing. Therefore, the increase in insertion resistance of the connector caused by providing the first inner lip can be kept small.

[0020] [7] In any of the above [1] to [6], the connector housing may have an insertion portion inserted into the mounting hole, a first portion arranged in the internal space of the case, and a second portion arranged in the external space of the case, and the second seal portion may be located closer to the second portion than the first seal portion.

[0021] According to this configuration, the second seal portion is located closer to the external space of the case than the first seal portion. Therefore, when liquid attempts to penetrate into the interior of the case from the outside, the liquid first comes into contact with the second seal portion. This second seal portion can prevent liquid from penetrating further into the case than the second seal portion. Therefore, it is possible to prevent liquid from coming into contact with the first seal portion and the mounting hole where the first seal portion is in close contact. As a result, it is possible to effectively prevent a decrease in the sealing ability of the first seal portion.

[0022] [8] In any of the above [1] to [7], the outer surface of the connecting portion extending between the first outer lip and the second outer lip may be formed to extend parallel to the insertion direction.

[0023] In this configuration, the outer surface of the connecting portion extending between the first outer lip and the second outer lip does not contact the first surface of the mounting hole, which effectively prevents an increase in insertion resistance of the connector into the mounting hole due to the provision of the connecting portion.

[0024] [Details of the embodiments of the present disclosure] Specific examples of connectors according to the present disclosure are described below with reference to the drawings. For ease of explanation, some components may be exaggerated or simplified in the drawings. The dimensional ratios of the various components may differ between drawings. In this specification, "parallel," "orthogonal," and "horizontal" do not necessarily refer to strictly parallel, orthogonal, or horizontal, but also include approximately parallel, orthogonal, or horizontal within the scope of the present embodiment's effects. As used herein, "annular" refers to any loop-forming structure or a continuous shape without edges. The term "annular" includes, but is not limited to, circular, elliptical, and polygonal shapes with pointed or rounded corners. The term "cylindrical" as used herein does not only refer to structures with a continuous peripheral wall formed around the entire circumference, but also includes structures formed by combining multiple components and structures with a notch or other notch in the circumferential direction, such as a C-shape. The term "cylindrical" includes, but is not limited to, circular, elliptical, and polygonal shapes with pointed or rounded corners. In this specification, "facing" refers to surfaces or components facing each other, and includes not only cases where they are completely facing each other but also cases where they are partially facing each other. Furthermore, "facing" in this specification includes both cases where a separate component is interposed between two components and cases where nothing is interposed between the two components. Each drawing illustrates a first axis X, a second axis Y perpendicular to the first axis X, and a third axis Z perpendicular to both the first axis X and the second axis Y. Each drawing illustrates a first direction X1, which is one direction along the first axis X, and a first opposite direction X2, which is another direction along the first axis X and opposite to the first direction X1. Each drawing also illustrates a second direction Y1, which is one direction along the second axis Y, and a second opposite direction Y2, which is another direction along the second axis Y and opposite to the second direction Y1. Each drawing illustrates a third direction Z1, which is one direction along the third axis Z, and a third opposite direction Z2, which is another direction along the third axis Z and is the opposite direction to the third direction Z1. Furthermore, terms such as "first," "second," and "third" in this specification are used simply to distinguish between objects and are not used to rank the objects.It should be noted that the present invention is not limited to these examples, but is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0025] (Overall composition) As shown in FIG. 1, the connector 10 is attached to a case 90 of an electrical device (not shown) mounted on a vehicle. Examples of the electrical device include an inverter, a motor, and a relay box. The connector 10 is fixed to the case 90 with bolts or the like. The connector 10 is a connector for electrically connecting the inside and outside of the case 90. Note that the directions in the drawings do not necessarily represent the orientation of the connector 10 when in use.

[0026] (Case 90 configuration) 1 and 2, the case 90 has a box-shaped case body 91 and a cover 92 attached to the case body 91. The case body 91 is formed in a box shape that opens in the first opposite direction X2. The cover 92 is a separate part from the case body 91. The cover 92 is attached to the case body 91 so as to close the opening of the case body 91 in the first opposite direction X2. Note that the case body 91 and the cover 92 can be made of, for example, an iron-based or aluminum-based metal material.

[0027] The cover 92 has an attachment portion 94 that protrudes in the first direction X1, and a fixing portion 99 for fixing the cover 92 to the case main body 91. The attachment portion 94 is formed in an annular shape by having an attachment hole 95. The attachment hole 95 is formed to penetrate the attachment portion 94 along the first axis X. The attachment hole 95 is formed to communicate between the internal space of the case 90 and the external space of the case 90 when the cover 92 is attached to the case main body 91.

[0028] 3, the mounting hole 95 is formed into a flat shape that is longer in the third axis Z than in the second axis Y when viewed from the penetrating direction of the mounting hole 95 (here, the first opposite direction X2). The mounting hole 95 of this embodiment is formed into an elliptical shape when viewed from the first opposite direction X2.

[0029] The cover 92 is attached to the outer periphery of the connector 10 by being moved in an assembly direction D1 along the first axis X. At this time, the connector 10 is inserted into the attachment hole 95 of the cover 92 along an insertion direction D2 along the first axis X. In this embodiment, the assembly direction D1 coincides with the first direction X1, and the insertion direction D2 coincides with the first opposite direction X2. Note that the insertion direction D2 indicates the relative insertion direction of the connector 10 with respect to the cover 92, and does not limit the connector 10 to the fixed side.

[0030] 2, the inner peripheral surface of the mounting hole 95 has a first surface 96 extending along the first axis X. The first surface 96 is formed to extend parallel to the insertion direction D2. The first surface 96 is formed to extend horizontally along the first axis X in a cross-sectional view (i.e., a vertical cross-sectional view) taken along a plane perpendicular to an axis perpendicular to the axial direction of the mounting hole 95 (here, the first direction X1), here, the second axis Y. The first surface 96 is formed as a flat surface without any irregularities in the vertical cross-sectional view.

[0031] An inclined surface 97 is provided at the end of the mounting hole 95 in the first direction X1. The inclined surface 97 is formed so that the opening width of the mounting hole 95 increases toward the opening end of the mounting hole 95 in the first direction X1. The inclined surface 97 is formed continuously around the entire circumferential direction of the mounting hole 95.

[0032] A protrusion 98 is provided at the end of the mounting hole 95 in the first opposite direction X2. The protrusion 98 is formed so as to protrude radially inward of the mounting portion 94 beyond the first surface 96. The protrusion 98 is formed continuously around the entire circumferential circumference of the mounting hole 95.

[0033] 1, the fixing portion 99 is formed to protrude in the first direction X1. The fixing portion 99 is fixed to the case body 91 by bolts or the like (not shown). The fixing portion 99 is fixed to the case body 91 with a sealing material 100 interposed between the fixing portion 99 and the peripheral wall of the case body 91. The sealing material 100 is, for example, a rubber packing.

[0034] (Configuration of Connector 10) The connector 10 is inserted into a mounting hole 95 of the case 90. Inside the case 90, the connector 10 is electrically connected to a substrate 110 provided inside the case 90. Outside the case 90, the connector 10 is electrically connected to a mating connector (not shown).

[0035] The connector 10 has a plurality of conductive terminals 20 , a connector housing 30 that holds the terminals 20 , and a seal member 70 that is attached to the outer periphery of the connector housing 30 .

[0036] (Terminal 20 Configuration) Each terminal 20 is made of metal. Each terminal 20 is formed in a rod shape as a whole. Each terminal 20 extends along a first axis X. Each terminal 20 has a first terminal portion 21 electrically connected to a substrate 110 provided inside the case 90, a second terminal portion 22 electrically connected to a mating terminal of a mating connector (not shown), and an intermediate portion 23 provided between the first terminal portion 21 and the second terminal portion 22.

[0037] (Configuration of connector housing 30) The connector housing 30 has a primary molded portion 31 that covers a part of the terminal 20, and a secondary molded portion 32 that is molded using the primary molded portion 31 as an insert part. The connector housing 30 is made of, for example, a synthetic resin.

[0038] The primary molded portion 31 holds a plurality of terminals 20. The primary molded portion 31 holds the middle portion 23 of each terminal 20 in an embedded state. In other words, the middle portion 23 of each terminal 20 is embedded inside the primary molded portion 31. Each terminal 20 is integrally formed with the primary molded portion 31 by, for example, insert molding.

[0039] The secondary molded portion 32 is molded to configure the connector housing 30 together with the primary molded portion 31. The secondary molded portion 32 is configured integrally with the primary molded portion 31. The secondary molded portion 32 is formed to surround the outer periphery of the primary molded portion 31.

[0040] The secondary molding portion 32 has an insertion portion 40 that is inserted into the mounting hole 95 of the case 90, a first portion 50 that is arranged in the internal space of the case 90, and a second portion 60 that is arranged in the external space of the case 90.

[0041] (Configuration of insertion section 40) The insertion portion 40 is disposed inside the mounting hole 95. The insertion portion 40 has an outer peripheral surface 41 formed in a shape corresponding to the inner peripheral surface of the mounting hole 95. The outer peripheral surface 41 of the insertion portion 40 is formed so as to be able to come into contact with a first surface 96 of the mounting hole 95 when the insertion portion 40 is inserted into the mounting hole 95. The insertion portion 40 is formed in an overall cylindrical shape. A portion of the primary molded portion 31 is housed inside the insertion portion 40, and a portion of the intermediate portion 23 of each terminal 20 is also housed inside the insertion portion 40.

[0042] 4, the insertion portion 40 is formed in a flat shape that is longer in the third axis Z than in the second axis Y. The insertion portion 40 of this embodiment is formed in an elliptical cylindrical shape as a whole. An accommodating groove 42 for accommodating the seal member 70 is provided in the outer peripheral surface 41 of the insertion portion 40. The accommodating groove 42 is formed so as to be recessed radially inward from the outer peripheral surface 41 of the insertion portion 40. The accommodating groove 42 is formed continuously around the entire circumferential direction of the insertion portion 40. The accommodating groove 42 is formed so as to open radially outward from the insertion portion 40. As shown in FIG. 1 , the bottom surface of the accommodating groove 42 is arranged to face a first surface 96 of the mounting hole 95 when the insertion portion 40 is inserted into the mounting hole 95.

[0043] As shown in Fig. 4, the accommodation groove 42 has a plurality of positioning recesses 43. The accommodation groove 42 of this embodiment has four positioning recesses 43 (only two are shown in Fig. 4). The four positioning recesses 43 are provided at intervals from one another in the circumferential direction of the accommodation groove 42. Each positioning recess 43 is formed to protrude in the first direction X1.

[0044] As shown in FIG. 1 , the gap between the insertion portion 40 and the mounting hole 95 opens toward the external space of the case 90. That is, the gap between the insertion portion 40 and the mounting hole 95 is in communication with the external space of the case 90. This is because the cover 92 is attached after the connector 10 is fixed to the case main body 91. More specifically, for example, when the connector 10 is inserted from the outside of a case in which the case main body 91 and the cover 92 are integrated, it is possible to cover the gap between the insertion portion 40 and the mounting hole 95. However, when the connector 10 is inserted from the inside of the case 90, as in this embodiment, that is, when the connector 10 fixed to the inside of the case main body 91 is inserted into the mounting hole 95 of the cover 92, it is difficult to cover the gap between the insertion portion 40 and the mounting hole 95. For this reason, in the structure of this embodiment, liquid is more likely to seep into the gap between the insertion portion 40 and the mounting hole 95 from the external space of the case 90 than when the gap between the insertion portion 40 and the mounting hole 95 is covered.

[0045] As shown in FIG. 5 , the insertion portion 40 has a recess 44 provided at the end of the insertion portion 40 in the first opposite direction X2. The recess 44 is formed to be recessed radially inward from the outer circumferential surface 41 of the insertion portion 40. The recess 44 is formed continuously around the entire circumferential direction of the insertion portion 40. The recess 44 is formed to open radially outward from the insertion portion 40. The recess 44 is formed to open in the first opposite direction X2. A protrusion 98 of the mounting hole 95 of the cover 92 is received in the recess 44. When the protrusion 98 is received in the recess 44, the end face of the recess 44 in the first opposite direction X2 is covered by the protrusion 98. This forms a maze structure between the insertion portion 40 and the mounting hole 95. Specifically, a path from the end face of the cover 92 in the first opposite direction X2 to the seal member 70 forms a maze structure. Therefore, for example, high-pressure water can be prevented from directly hitting (hitting) the seal member 70 during high-pressure washing, and deformation of the seal member 70 due to high-pressure water can be suitably prevented.

[0046] (Configuration of first part 50) As shown in FIG. 1 , the first portion 50 is formed to protrude from the insertion portion 40 in the first direction X1. The first portion 50 is disposed inside the case main body 91. The first portion 50 is formed in a cylindrical shape as a whole. A portion of the primary molded portion 31 and a portion of each terminal 20 are housed inside the first portion 50. A portion of a first terminal portion 21 of each terminal 20 is housed inside the first portion 50. Here, the first terminal portion 21 is formed to protrude in the first direction X1 from an end face of the primary molded portion 31 in the first direction X1. Note that an end portion of the first terminal portion 21 in the first direction X1 is formed to protrude in the first direction X1 beyond the end face of the first portion 50 in the first direction X1.

[0047] 3, the first portion 50 is formed in a flat shape that is longer in the third axis Z than in the second axis Y. The first portion 50 of this embodiment is formed in an elliptical cylindrical shape as a whole. The first portion 50 has one or more (three in this embodiment) fixing portions 51. The three fixing portions 51 are provided at intervals from one another in the circumferential direction of the first portion 50. Each fixing portion 51 is formed to protrude radially outward from the outer circumferential surface of the first portion 50. Each fixing portion 51 has a metal collar 52 inserted into the inside of a through hole that penetrates the fixing portion 51 along the first axis X. In this embodiment, the collar 52 is formed in an annular shape. A fixing bolt (not shown) is inserted into the hole of the collar 52. The connector 10 is fixed to the case main body 91 shown in FIG. 1 via the board 110 and the like by fastening a bolt inserted into the hole of the collar 52.

[0048] (Configuration of second part 60) 1, the second portion 60 has one or more (two in this embodiment) connector fitting portions 61 protruding from the insertion portion 40 in the first opposite direction X2. The two connector fitting portions 61 are arranged side by side along the third axis Z. Each connector fitting portion 61 is formed to protrude further in the first opposite direction X2 than the cover 92. Two mating connectors (not shown) provided outside the case 90 are fitted into the two connector fitting portions 61, respectively.

[0049] Each connector fitting portion 61 is formed into a cylindrical shape as a whole. The second terminal portion 22 of each terminal 20 is housed inside each connector fitting portion 61. Here, the second terminal portion 22 is formed so as to protrude in the first opposite direction X2 from the end face of the primary molded portion 31 in the first opposite direction X2.

[0050] 4, each connector fitting portion 61 is formed in a flat shape that is longer in the third axis Z than in the second axis Y. Each connector fitting portion 61 in this embodiment is formed in a rectangular cylindrical shape.

[0051] (Configuration of seal member 70) The seal member 70 is attached to the outer periphery of the insertion portion 40. The seal member 70 is housed inside the housing groove 42. The seal member 70 is formed to surround the insertion portion 40 over the entire circumferential direction. The seal member 70 of this embodiment is formed in an elliptical ring shape. The seal member 70 is formed to be elastically deformable. As shown in FIG. 1 , when the insertion portion 40 is inserted into the mounting hole 95, the seal member 70 comes into close contact with the first surface 96 of the mounting hole 95 over the entire circumferential direction, thereby sealing between the outer circumferential surface of the connector housing 30 and the inner circumferential surface of the mounting hole 95.

[0052] 2, the seal member 70 has an annular first seal portion 71, an annular second seal portion 72 provided apart from the first seal portion 71, and an annular connecting portion 73 connecting the first seal portion 71 and the second seal portion 72. The seal member 70 is a single component in which the first seal portion 71, the connecting portion 73, and the second seal portion 72 are integrally formed. The seal member 70 is made of, for example, rubber. Examples of materials that can be used for the seal member 70 include nitrile rubber, silicone rubber, urethane rubber, acrylic rubber, butyl rubber, and ethylene propylene rubber.

[0053] The second seal portion 72 is provided at a position where it is inserted into the mounting hole 95 of the case 90 before the first seal portion 71. Specifically, the second seal portion 72 is provided at a position facing the first opposite direction X2 from the first seal portion 71. The second seal portion 72 is provided at a position closer to the external space of the case 90 than the first seal portion 71. Specifically, the second seal portion 72 is provided at a position closer to the second part 60 than the first seal portion 71.

[0054] As shown in FIG. 5 , one or more (two in this embodiment) first outer peripheral lips 74 are provided on the outer periphery of the first seal portion 71. The first outer peripheral lip 74 is formed in an annular shape extending around the entire circumferential circumference of the seal member 70. The first outer peripheral lip 74 is formed to protrude radially outward from the outer peripheral surface 73A of the connecting portion 73. The apex of the first outer peripheral lip 74 is located at a position radially outward from the outer peripheral surface 41 of the insertion portion 40. The first outer peripheral lip 74 is formed to protrude in an arched curve. The first outer peripheral lip 74 has a rising portion that rises from the outer peripheral surface 73A of the connecting portion 73 at a predetermined inclination angle, an apex, and a falling portion that falls from the apex toward the other first outer peripheral lip 74 at a predetermined inclination angle. The falling portions of the two first outer peripheral lips 74 are connected to each other at a position radially outward from the outer peripheral surface 73A of the connecting portion 73. That is, the rising portions of the first outer peripheral lips 74 do not extend to the outer peripheral surface 73A of the connecting portion 73. In other words, a recess 74X is formed between the tops of the two first outer peripheral lips 74 by the rising portions of the two first outer peripheral lips 74. The bottom of the recess 74X is located at a position radially outward from the outer peripheral surface 41 of the insertion portion 40.

[0055] 1, the first outer peripheral lip 74 is formed so as to come into close contact with a first surface 96 of the mounting hole 95 when the insertion portion 40 is inserted into the mounting hole 95. When the insertion portion 40 is inserted into the mounting hole 95, the first outer peripheral lip 74 is provided between the first surface 96 of the mounting hole 95 and the bottom surface of the accommodating groove 42 in a state in which the first outer peripheral lip 74 is compressed in the radial direction of the seal member 70 (in FIG. 1, the third direction Z1 and the third opposite direction Z2).

[0056] As shown in FIG. 5 , the inner periphery of the first seal portion 71 is provided with one or more (one in this embodiment) first inner circumferential lips 75 and two recesses 76 provided on both sides of the first inner circumferential lip 75. The first inner circumferential lip 75 and the two recesses 76 are each formed in an annular shape extending around the entire circumferential circumference of the seal member 70. Each recess 76 is formed to be recessed radially outward from the inner circumferential surface of the first seal portion 71. Each recess 76 is formed to be recessed in an arched curve. The first inner circumferential lip 75 is formed to protrude radially inward from the bottom of each recess 76 of the seal member 70. The first inner circumferential lip 75 is formed to protrude in an arched curve. The first inner circumferential lip 75 is formed to be in close contact with the bottom surface of the accommodation groove 42. The first inner circumferential lip 75 is provided at a position overlapping the recess 74X in the axial direction of the seal member 70 (here, the first direction X1). Specifically, the top of the first inner circumferential lip 75 is located at a position that overlaps with the bottom of the recess 74X in the axial direction of the seal member 70.

[0057] One or more (one in this embodiment) second outer circumferential lips 77 are provided on the outer periphery of the second seal portion 72. The second outer circumferential lip 77 is formed in an annular shape extending around the entire circumferential circumference of the seal member 70. The second outer circumferential lip 77 is formed to protrude radially outward from the outer circumferential surface 73A of the connecting portion 73. The second outer circumferential lip 77 is formed to protrude in an arched curve. The apex of the second outer circumferential lip 77 is located at a position radially outward from the outer circumferential surface 41 of the insertion portion 40.

[0058] Here, the height of the second outer peripheral lip 77 is formed to be lower than the height of the first outer peripheral lip 74. In other words, the amount by which the second outer peripheral lip 77 protrudes from the outer peripheral surface 73A of the connecting portion 73 is smaller than the amount by which the first outer peripheral lip 74 protrudes from the outer peripheral surface 73A of the connecting portion 73. In other words, the apex of the second outer peripheral lip 77 is located radially inward from the apex of the first outer peripheral lip 74. However, the apex of the second outer peripheral lip 77 is located radially outward from the bottom of the recess 74X. In this way, the apex of the second outer peripheral lip 77 is located between the apex of the first outer peripheral lip 74 and the bottom of the recess 74X in the radial direction of the seal member 70. 1, the second outer peripheral lips 77 are formed to come into close contact with a first surface 96 of the mounting hole 95 when the insertion portion 40 is inserted into the mounting hole 95. When the insertion portion 40 is inserted into the mounting hole 95, each second outer peripheral lip 77 is provided between the first surface 96 of the mounting hole 95 and the bottom surface of the accommodating groove 42 in a state where it is compressed in the radial direction of the seal member 70 (in FIG. 1, the third direction Z1 and the third opposite direction Z2).

[0059] As shown in FIG. 5 , the inner periphery of the second seal portion 72 is provided with one or more (one in this embodiment) second inner circumferential lips 78 and two recesses 79 provided on both sides of the second inner circumferential lip 78. The second inner circumferential lip 78 and the two recesses 79 are each formed in an annular shape extending around the entire circumferential circumference of the seal member 70. Each recess 79 is formed to be recessed radially outward from the inner circumferential surface of the connecting portion 73. The bottom surface of each recess 79 is formed to extend parallel to the insertion direction D2 in a vertical cross-sectional view. The second inner circumferential lip 78 is formed to protrude radially inward from the bottom surface of each recess 79. The second inner circumferential lip 78 is formed to protrude in an arched curve. The second inner circumferential lip 78 is formed to be in close contact with the bottom surface of the accommodation groove 42. The second inner circumferential lip 78 is provided at a position overlapping the second outer circumferential lip 77 in the axial direction of the seal member 70. Specifically, the top of the second inner circumferential lip 78 is located at a position that overlaps with the top of the second outer circumferential lip 77 in the axial direction of the seal member 70.

[0060] The connecting portion 73 is formed to extend between the first seal portion 71 and the second seal portion 72. The connecting portion 73 is formed in an annular shape that extends over the entire circumferential direction of the seal member 70. The outer peripheral surface 73A of the connecting portion 73 is formed to extend between the first outer peripheral lip 74 of the first seal portion 71 and the second outer peripheral lip 77 of the second seal portion 72. The outer peripheral surface 73A of the connecting portion 73 is formed to extend parallel to the insertion direction D2 in a longitudinal sectional view.

[0061] Here, the first dimension L1 of the connecting portion 73 along the insertion direction D2 is set to be smaller than, for example, the second dimension L2 of the second outer peripheral lip 77 along the insertion direction D2. The first dimension L1 is set to be larger than, for example, a dimension that is 1 / 2 times the second dimension L2. Thus, the first dimension L1 of the present embodiment is set such that the relational expression L2 / 2 < L1 < L2 holds. More specifically, the first dimension L1 is the distance along the insertion direction D2 between the rising start position of the upper side (the first opposite direction X2 side) of the first outer peripheral lip 74 in the figure and the rising start position of the lower side (the first direction X1 side) of the second outer peripheral lip 77 in the figure. The second dimension L2 is the distance along the insertion direction D2 between the rising start position of the upper side (the first opposite direction X2 side) of the second outer peripheral lip 77 in the figure and the rising start position of the lower side (the first direction X1 side) of the second outer peripheral lip 77 in the figure. Note that the rising start positions of the first outer peripheral lip 74 and the second outer peripheral lip 77 coincide with the end positions of the R shape of the first outer peripheral lip 74 and the second outer peripheral lip 77.

[0062] The end portion of the seal member 70 in the first direction X1 has a chamfer portion 80. The chamfer portion 80 is formed in a shape obtained by chamfering the corner between the outer peripheral surface of the first seal portion 71 and the end surface of the first seal portion 71 in the first direction X1 with an R chamfer or a C chamfer. The chamfer portion 80 of the present embodiment is formed in a shape obtained by chamfering the corner between the outer peripheral surface of the first seal portion 71 and the end surface of the first seal portion 71 in the first direction X1 with a C chamfer. The chamfer portion 80 is formed over the entire circumferential direction of the seal member 70.

[0063] As shown in Fig. 4, the seal member 70 has a plurality of (four in this embodiment) positioning protrusions 81. The four positioning protrusions 81 are provided at intervals from one another in the circumferential direction of the seal member 70. Each positioning protrusion 81 is formed to protrude in the first direction X1 from an end face of the first seal portion 71 in the first direction X1. The four positioning protrusions 81 are formed so as to be able to fit into the four positioning recesses 43, respectively. The seal member 70 is positioned in the circumferential direction with respect to the insertion portion 40 by fitting the four positioning protrusions 81 into the four positioning recesses 43, respectively.

[0064] In the seal member 70 of this embodiment, the positioning protrusion 81 is provided only on the end in the first direction X1, i.e., only on one side, of the end in the first direction X1 and the end in the first opposite direction X2 of the seal member 70. This allows the seal member 70 to be formed in an asymmetric shape, which makes it possible to prevent the seal member 70 from being fitted to the connector housing 30 in an incorrect position. Specifically, it is possible to prevent the seal member 70 from being fitted to the connector housing 30 in an attitude in which the positioning protrusion 81 protrudes in the first opposite direction X2. This makes it possible to preferably prevent incorrect assembly when assembling the seal member 70 to the connector housing 30.

[0065] (Method of assembling the connector 10) Next, a method for assembling the connector 10 to the case 90 will be described. 2, connector 10 is prepared in which seal member 70 is attached to housing groove 42 of insertion portion 40. Also, case body 91 and cover 92, which is a separate part from case body 91, are prepared.

[0066] Next, the connector 10 is inserted into the internal space of the case body 91. After that, the first portion 50 of the connector 10 is fixed to the case body 91. Specifically, the connector 10 is fixed to the case body 91 by fastening a bolt inserted into a hole in the collar 52 of the connector 10. As a result, the connector 10 is fixed inside the case body 91. At this time, the cover 92 is not attached to the case body 91.

[0067] Next, the cover 92 is moved relative to the connector 10 and the case body 91 in the assembly direction D1. As a result, the connector 10 is moved relative to the cover 92 in the insertion direction D2, and the connector 10 is inserted into the mounting hole 95 in the insertion direction D2. At this time, the second part 60, which protrudes further in the insertion direction D2 than the insertion part 40, is inserted into the mounting hole 95 first. Thereafter, the outer peripheral surface 41 of the insertion part 40 slides on the first surface 96 of the mounting hole 95, and the insertion part 40 enters the mounting hole 95 in the insertion direction D2.

[0068] Subsequently, when the insertion portion 40 is further inserted into the mounting hole 95 along the insertion direction D2, the second outer lip 77 of the seal member 70 accommodated in the accommodation groove 42 enters the mounting hole 95. Then, the mounting portion 94 of the case 90 tilts the second outer lip 77 in the first direction X1 and elastically deforms the second outer lip 77 so that it is compressed radially between the bottom surface of the accommodation groove 42. The elastic restoring force of the elastically deformed second outer lip 77 generates friction between the inner circumferential surface of the mounting hole 95 and the second outer lip 77, increasing the insertion resistance of the connector 10 into the mounting hole 95. However, in the connector 10 of this embodiment, the height of the second outer lip 77 is formed lower than the height of the first outer lip 74. Therefore, when the second outer lip 77 enters the mounting hole 95, the frictional force between the second outer lip 77 and the mounting hole 95 can be prevented from increasing. This makes it possible to suppress an increase in the insertion resistance of the connector 10 into the mounting hole 95, which would be caused by providing the second outer peripheral lip 77.

[0069] Next, as shown in FIG. 1, when the insertion portion 40 is further inserted into the mounting hole 95 along the insertion direction D2, the first outer peripheral lip 74 of the seal member 70 enters the mounting hole 95. Then, the mounting portion 94 of the case 90 elastically deforms so as to tilt the two first outer peripheral lips 74 toward the first direction X1 and compress them radially between the bottom surface of the housing groove 42. Due to the elastic restoring force of the two first outer peripheral lips 74 elastically deformed in this way, friction occurs between the inner peripheral surface of the mounting hole 95 and the first outer peripheral lip 74, and the insertion resistance of the connector 10 with respect to the mounting hole 95 increases. At this time, when the first dimension L1 of the connecting portion 73 is small, that is, when the separation distance between the first outer peripheral lip 74 and the second outer peripheral lip 77 is short, the insertion resistance caused by the elastic restoring force of the second outer peripheral lip 77 is added to the insertion resistance caused by the elastic restoring force of the first outer peripheral lip 74. Therefore, when the first dimension L1 is small, the insertion resistance of the connector 10 with respect to the mounting hole 95 increases, and the insertion force F of the connector 10 increases. On the other hand, in the seal member 70 of the present embodiment, the first dimension L1 is set so that the relational expression L2 / 2 < L1 < L2 holds. Thereby, since the first outer peripheral lip 74 and the second outer peripheral lip 77 can be separated to some extent, it is possible to reduce the addition of the insertion resistance caused by the elastic restoring force of the second outer peripheral lip 77 to the insertion resistance caused by the elastic restoring force of the first outer peripheral lip 74. Therefore, it is possible to suppress an increase in the insertion resistance of the connector 10 with respect to the mounting hole 95 due to the provision of the second outer peripheral lip 77. For this reason, it is possible to greatly suppress an increase in the insertion force F of the connector 10 due to the provision of the second outer peripheral lip 77.

[0070] Subsequently, the cover 92 is moved along the assembling direction D1 until the protruding portion 98 of the cover 92 contacts the recess 44 of the connector housing 30. Thereafter, the cover 92 is fixed to the case body 91 with bolts not shown. Through the above steps, the connector 10 can be assembled to the case 90.

[0071] Here, FIG. 6 is a graph showing the relationship between the stroke (fitting stroke) when the first dimension L1 is set so that the relational expression L2 / 2 < L1 < L2 holds and the insertion force F of the connector 10. FIG. 6 shows the relationship between the stroke of the mounting hole 95 and the connector 10 with the point where the end portion of the mounting portion 94 in the first direction X1 contacts the second outer peripheral lip 77 of the seal member 70 as the reference point, and the insertion force F of the connector 10 that increases due to the elastic restoring force of the seal member 70.

[0072] When the connector 10 is inserted into the mounting hole 95, first, the second outer peripheral lip 77 is elastically deformed by the mounting portion 94, and due to the elastic restoring force of the second outer peripheral lip 77, an insertion force F1 is generated. The insertion force F1 increases as the insertion of the connector 10 into the mounting hole 95 progresses, reaches a peak, and then decreases.

[0073] Subsequently, after the insertion force F1 decreases to a predetermined value, the end portion of the mounting portion 94 in the first direction X1 contacts the first outer peripheral lip 74, and the first outer peripheral lip 74 is elastically deformed by the mounting portion 94. Then, due to the elastic restoring force of the first outer peripheral lip 74, an insertion force F2 is generated. The insertion force F2 increases as the insertion of the connector 10 into the mounting hole 95 progresses. The insertion force F2 has two peaks corresponding to the two first outer peripheral lips 74. The insertion force F2 decreases after reaching the second peak. Since the height of the first outer peripheral lip 74 is formed higher than the height of the second outer peripheral lip 77, the peak of the insertion force F2 is larger than the peak of the insertion force F1.

[0074] Here, when the first dimension L1 is small, before the insertion force F1 caused by the second outer peripheral lip 77 decreases to a predetermined value, the insertion force F2 caused by the first outer peripheral lip 74 is generated. Then, the insertion force F of the connector 10 becomes the value obtained by adding the insertion force F1 and the insertion force F2. Therefore, when the first dimension L1 is small, due to providing the second outer peripheral lip 77, the insertion force F of the connector 10 becomes large.

[0075] On the other hand, when the first dimension L1 is set such that the relational expression L2 / 2 < L1 < L2 holds, as shown in FIG. 6, after the insertion force F1 caused by the second outer peripheral lip 77 decreases to a predetermined value, the insertion force F2 caused by the first outer peripheral lip 74 can be generated. As a result, it is possible to reduce the addition of the insertion force F1 caused by the second outer peripheral lip 77 to the insertion force F2 caused by the first outer peripheral lip 74. Therefore, it is possible to suppress an increase in the insertion force F of the connector 10 with respect to the mounting hole 95 due to the provision of the second outer peripheral lip 77. In other words, in the connector 10, the first dimension L1 is set so that the insertion force F1 caused by the second outer peripheral lip 77 is not added to the insertion force F2 caused by the first outer peripheral lip 74.

[0076] Next, the operation and effect of this embodiment will be described. (1) The connector 10 includes a connector housing 30 that is inserted along the insertion direction D2 into the mounting hole 95 of the case 90, and a seal member 70 that is attached to the outer periphery of the connector housing 30 and seals between the connector housing 30 and the mounting hole 95. The seal member 70 has a first seal portion 71 having an annular first outer peripheral lip 74 that can be in close contact with a first surface 96 that extends parallel to the insertion direction D2 on the inner peripheral surface of the mounting hole 95. The seal member 70 is provided apart from the first outer peripheral lip 74 and has a second seal portion 72 having an annular second outer peripheral lip 77 that can be in close contact with the first surface 96 of the mounting hole 95, and a connecting portion 73 that connects the first seal portion 71 and the second seal portion 72. Each of the first outer peripheral lip 74 and the second outer peripheral lip 77 projects radially outward from the outer peripheral surface 73A of the connecting portion 73. The height of the second outer peripheral lip 77 is formed lower than the height of the first outer peripheral lip 74.

[0077] According to this configuration, the first seal portion 71 having the first outer peripheral lip 74 and the second seal portion 72 having the second outer peripheral lip 77 provide a double seal between the connector housing 30 and the mounting hole 95. As a result, even if the sealing ability of the second seal portion 72 is reduced due to, for example, progression of corrosion of the mounting hole 95, which is the sealing surface of the case 90, the first seal portion 71 can maintain an appropriate sealing ability between the connector housing 30 and the mounting hole 95.

[0078] Here, by providing the second seal portion 72 in addition to the first seal portion 71, the insertion resistance of the connector 10 into the mounting hole 95 increases when the seal member 70 enters the mounting hole 95. Specifically, when the second seal portion 72 enters the mounting hole 95, the second outer lip 77 is elastically deformed so as to be compressed between the mounting hole 95 and the connector housing 30. The elastic restoring force of the elastically deformed second outer lip 77 generates friction between the second outer lip 77 and the mounting hole 95, increasing the insertion resistance of the connector 10 into the mounting hole 95. However, in the connector 10 of this embodiment, the height of the second outer lip 77 is formed lower than the height of the first outer lip 74. This prevents the friction between the second outer lip 77 and the mounting hole 95 from increasing. Therefore, the increase in insertion resistance of the connector 10 due to the provision of the second seal portion 72 can be kept small. Therefore, the increase in insertion force F of the connector 10 due to the provision of the second seal portion 72 can be kept small. As a result, the workability when inserting the connector 10 into the mounting hole 95 can be prevented from decreasing.

[0079] (2) The provision of the connecting portion 73 that connects the first seal portion 71 and the second seal portion 72 allows the first seal portion 71 and the second seal portion 72 to be integrated. This reduces the number of parts compared to when the first seal portion 71 and the second seal portion 72 are provided separately, and improves the workability when attaching the seal member 70 to the connector housing 30.

[0080] (3) The first dimension L1 of the connecting portion 73 along the insertion direction D2 is smaller than the second dimension L2 of the second outer peripheral lip 77 along the insertion direction D2. This effectively prevents the seal member 70 from becoming large in size in the insertion direction D2. This effectively prevents the seal member 70 from becoming elongated in the insertion direction D2, thereby effectively preventing the seal member 70 from curling up when inserted into the mounting hole 95.

[0081] (4) The first dimension L1 of the connecting portion 73 along the insertion direction D2 is greater than half the dimension of the second dimension L2 of the second outer lip 77. This reduces the insertion resistance caused by the elastic restoring force of the second outer lip 77 from being added to the insertion resistance caused by the elastic restoring force of the first outer lip 74, compared to when the first outer lip 74 and the second outer lip 77 are provided close to each other. Therefore, the increase in the insertion resistance of the connector 10 caused by providing the second seal portion 72 can be kept small, and the increase in the insertion force F of the connector 10 caused by providing the second seal portion 72 can be kept small.

[0082] (5) The second seal portion 72 is provided with one second outer peripheral lip 77. Therefore, compared to when multiple second outer peripheral lips 77 are provided, it is possible to prevent the frictional force between the second outer peripheral lip 77 and the mounting hole 95 from increasing. Therefore, it is possible to minimize the increase in the insertion force F of the connector 10 caused by providing the second seal portion 72.

[0083] (6) The seal member 70 is accommodated in the accommodation groove 42 formed to be recessed radially inward from the outer circumferential surface 41 of the insertion portion 40 of the connector housing 30. This facilitates positioning of the seal member 70 and effectively prevents the seal member 70 from shifting out of position.

[0084] (7) A first inner circumferential lip 75 is provided between the inner circumferential surface of the first seal portion 71 and the bottom surface of the accommodating groove 42. This improves the sealing performance between the inner circumferential surface of the first seal portion 71 and the bottom surface of the accommodating groove 42. Furthermore, a second inner circumferential lip 78 is provided between the inner circumferential surface of the second seal portion 72 and the bottom surface of the accommodating groove 42. This improves the sealing performance between the inner circumferential surface of the second seal portion 72 and the bottom surface of the accommodating groove 42.

[0085] (8) One first inner lip 75 is provided for two first outer lips 74. Therefore, compared to when two or more first inner lips 75 are provided for two first outer lips 74, it is possible to prevent the friction force between the first inner lip 75 and the accommodating groove 42 from increasing. Therefore, it is possible to minimize an increase in the insertion resistance of the connector 10 caused by providing the first inner lip 75.

[0086] (9) The second seal portion 72 is located closer to the second section 60 than the first seal portion 71. With this configuration, the second seal portion 72 is located closer to the external space of the case 90 than the first seal portion 71. Therefore, when liquid attempts to seep into the interior of the case 90 from the outside, the liquid first comes into contact with the second seal portion 72. The second seal portion 72 can prevent liquid from seeping into the interior of the case 90 beyond the second seal portion 72. Therefore, it is possible to prevent liquid from coming into contact with the first seal portion 71 and the mounting hole 95 where the first seal portion 71 is in tight contact. As a result, it is possible to suitably prevent a deterioration in the sealing ability of the first seal portion 71.

[0087] (10) The outer peripheral surface 73A of the connecting portion 73 extending between the first outer peripheral lip 74 and the second outer peripheral lip 77 is formed to extend parallel to the insertion direction D2. In this configuration, the outer peripheral surface 73A of the connecting portion 73 extending between the first outer peripheral lip 74 and the second outer peripheral lip 77 does not come into contact with the first surface 96 of the mounting hole 95. Therefore, an increase in the insertion resistance of the connector 10 into the mounting hole 95 due to the provision of the connecting portion 73 can be suitably suppressed.

[0088] (Other embodiments) The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0089] The structure of the seal member 70 in the above embodiment can be modified as needed. The structure of the first seal portion 71 can be changed as needed. The number of first outer peripheral lips 74 may be changed. For example, the number of first outer peripheral lips 74 may be changed to one, or to three or more.

[0090] The number of first inner circumferential lips 75 may be changed. For example, the number of first inner circumferential lips 75 may be changed to two or more. Also, the first inner circumferential lips 75 may be omitted. The chamfered portion 80 may be omitted.

[0091] The structure of the second seal portion 81 can be changed as needed. The number of second outer peripheral lips 77 may be changed. For example, the number of second outer peripheral lips 77 may be changed to two or more.

[0092] The number of second inner circumferential lips 78 may be changed. For example, the number of second inner circumferential lips 78 may be changed to two or more. Also, the second inner circumferential lips 78 may be omitted. There are no particular limitations on the number and positions of the positioning protrusions 81. For example, the positioning protrusions 81 may be formed to protrude in the first opposite direction X2 from the end face of the second seal portion 72 in the first opposite direction X2.

[0093] In the seal member 70 of the above embodiment, the positions of the first seal portion 71 and the second seal portion 72 may be interchanged. In this case, the first seal portion 71 is inserted into the mounting hole 95 before the second seal portion 72.

[0094] In the above embodiment, the seal member 70 has two seal portions, the first seal portion 71 and the second seal portion 72. However, the number of seal portions is not particularly limited. The seal member 70 may be modified to have three or more seal portions.

[0095] The structure of the connector housing 30 in the above embodiment can be modified as needed. The structure of the insertion portion 40 in the above embodiment can be modified as needed. For example, the number and positions of the positioning recesses 43 may be changed as needed. For example, the recesses 44 may be omitted.

[0096] The structure of the first portion 50 in the above embodiment may be modified as needed. For example, the number and positions of the fixing portions 51 may be changed as needed. The structure of the second portion 60 in the above embodiment may be modified as needed. For example, the number and positions of the connector fitting portions 61 may be changed as needed.

[0097] The structure of the case 90 in the above embodiment can be modified as needed. For example, the cover 92 may be formed integrally with the case body 91. The number of terminals 20 in the above embodiment can be changed as needed.

[0098] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above meaning, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0099] 10 Connectors 20 terminals 21 1st terminal section 22 2nd terminal section 23 Middle section 30 Connector housing 31 Primary forming part 32 Secondary molding section 40 Insertion section 41 Outer surface 42 Storage groove 43 Positioning recess 44 recess 50 Part 1 51 Fixed part 52 Color 60 Part 2 61 Connector fitting part 70 Sealing material 71 First seal part 72 Second seal part 73 Connecting part 73A Outer surface 74 First outer lip 74X Recess 75 First inner lip 76 Recess 77 Second outer lip 78 Second inner lip 79 Recess 80 Chamfer 81 Positioning protrusion 90 cases 91 Case body 92 Cover 94 Mounting part 95 Mounting hole 96 Page 1 97 Slope 98 Protrusion 99 Fixed part 100 sealing material 110 Substrate D1 Assembly direction D2 Insertion direction F, F1, F2 insertion force L1 First dimension L2 Second dimension X 1st axis X1 1st direction X2 1st opposite direction Y 2nd axis Y1 2nd direction Y2 2nd opposite direction Z 3rd axis Z1 3rd direction Z2 3rd opposite direction

Claims

1. a connector housing that is inserted in an insertion direction into a mounting hole of a case to which the connector is to be attached; a seal member attached to the outer periphery of the connector housing and sealing the gap between the connector housing and the mounting hole, The sealing member is a first seal portion having an annular first outer peripheral lip that can be in close contact with a first surface of the inner peripheral surface of the mounting hole that extends parallel to the insertion direction; a second seal portion having an annular second outer peripheral lip that is spaced apart from the first outer peripheral lip and that can come into close contact with the first surface of the mounting hole; a connecting portion that connects the first seal portion and the second seal portion, each of the first outer peripheral lip and the second outer peripheral lip protrudes radially outward from an outer peripheral surface of the connecting portion; A connector, wherein the height of the second outer peripheral lip is formed lower than the height of the first outer peripheral lip.

2. 2. The connector of claim 1, wherein a first dimension of the connecting portion along the insertion direction is smaller than a second dimension of the second outer lip along the insertion direction and is larger than 1 / 2 of the second dimension.

3. the first seal portion has two first outer peripheral lips, The connector according to claim 1 , wherein the second sealing portion has one of the second outer peripheral lips.

4. the first seal portion has a recess provided between the tops of the two first outer peripheral lips, 4. The connector according to claim 3, wherein the top of the second outer lip is located radially inward from the top of the first outer lip and radially outward from the bottom of the recess.

5. The connector housing has an accommodating groove formed so as to be recessed radially inward from an outer circumferential surface of the connector housing, The sealing member is accommodated in the accommodation groove, the first seal portion has a first inner peripheral lip that protrudes from an inner peripheral surface of the first seal portion toward a bottom surface of the accommodation groove and is capable of coming into close contact with the bottom surface of the accommodation groove; The connector according to claim 4, wherein the second seal portion has a second inner lip that protrudes from an inner surface of the second seal portion toward a bottom surface of the accommodating groove and is capable of tightly contacting the bottom surface of the accommodating groove.

6. the first seal portion has one first inner peripheral lip, the second seal portion has one second inner peripheral lip, the first inner circumferential lip is provided at a position overlapping the recess in the axial direction of the seal member, The connector according to claim 5 , wherein the second inner peripheral lip is provided at a position overlapping the first outer peripheral lip in the axial direction.

7. The connector housing includes: an insertion portion to be inserted into the mounting hole; a first portion disposed in the interior space of the case; a second portion disposed in the external space of the case; The connector according to claim 1 , wherein the second seal portion is provided at a position closer to the second portion than the first seal portion.

8. The connector according to claim 1 , wherein an outer peripheral surface of the connecting portion extending between the first outer peripheral lip and the second outer peripheral lip is formed to extend parallel to the insertion direction.

Images