ARRANGEMENT WITH A WATERPROOF CONNECTOR AND METHOD FOR ASSEMBLING THE SAME

Abstract

An arrangement comprising a waterproof connector (8), a printed circuit board (3), a housing (7), an annular sealing element (82), and a holder (83), wherein the printed circuit board (3) is arranged in the housing (7), the waterproof connector (8) has a connector base body (81) which is mounted on the printed circuit board (3) and inserted into a housing connector opening (71) formed in the housing (7); the annular sealing element (82) is arranged outside the housing (7) and surrounds the connector base body (81); the holder (83) is configured to press the annular sealing element (82) against the housing (7), and the annular sealing element (82) is held in contact with a connector base body sealing surface (813) of the connector base body (81) and a housing sealing surface (72) of the housing (7) to create a gap between the housing (7) and the connector base body (81). to close, wherein the arrangement also includes an external sealing retaining element (85),which is arranged to hold the annular sealing element (82), wherein movement of the annular sealing element (82) in one direction along the housing sealing surface (72) with respect to the outer sealing retaining element (85) is restricted, wherein the outer sealing retaining element (85) has a pair of outer retaining element side wall sections (851) that receive the annular sealing element (82) between them in the direction along the housing sealing surface (72), wherein the retainer (83) comprises: a pair of retainer side wall sections (831) that receive the outer sealing retaining element (85) between them in the direction along the housing sealing surface (72); and a pair of retainer flat plate sections (832), wherein on each retainer side wall section (831) of the pair of retainer side wall sections (831) a retainer flat plate section (832) of the pair of retainer flat plate sections (832) is arranged,wherein each holder flat plate section (832) of the pair of holder flat plate sections (832) extends from a holder side wall section (831) of the pair of holder side wall sections (831) in the direction of the connector base body (81), and wherein if a positional displacement amount between a center of the connector base body (81) and a center of the housing connector opening (71) in the direction along the housing sealing surface (72) is represented by X, a dimension of the outer sealing retaining element (85) in the direction along the housing sealing surface (72) is represented by L1, and a dimension between the pair of holder side wall sections (831) is represented by L2, a condition X<(L2-L1) / 2 is satisfied.

Description

Technical FieldThe present invention relates to an assembly having a waterproof connector for mounting on a circuit board and a method for mounting the same.Prior ArtA waterproof connector is known that includes a connector main body and a cover part. The connector base body is provided in a housing and fastened on a printed circuit board. The cover element is inserted into a housing connector opening of the housing, into which a matching connector can be inserted. The cover member is provided over the housing and the connector main body. The cover member includes a cylindrical portion and a flange-shaped portion. The cylindrical portion is inserted into the housing connector hole to be fitted into the connector main body. The flange-shaped portion is provided outside the housing and extends along an outer surface of the housing.The watertight connector also comprises an inner and an outer sealing element. The inner sealing member is configured to close a gap between the cylindrical portion and the connector main body. The outer seal member is configured to close a gap between the flange-shaped portion and a peripheral edge portion of the housing connector opening in the housing (see, e.g., JP 2009-9845 A).JP 2014-150 017 A discloses an arrangement having a watertight connector, a printed circuit board, a housing, an annular sealing element and a holder, wherein the printed circuit board is arranged in the housing and the watertight connector has a connector base body which is mounted on the printed circuit board and can be inserted into a housing connector opening formed in the housing. The waterproof connector further includes an annular sealing member provided outside the housing and surrounding the connector main body, and a holder provided to the housing and configured to press the annular sealing member against the housing. The annular sealing member is further held in contact with the outer circumferential surface of the connector main body and an outer surface of the housing to close a gap between the housing and the connector main body. Similar arrangements are evident from JP 2015-133 254 A, JP 2007-128 715 A and DE 10 2007 045 280 B3.SUMMARY OF THE INVENTIONTechnical ProblemHowever, the cylindrical section of the cover element can be inserted into the housing connector opening into which the mating connector is to be inserted. With the insertion of the cylindrical portion, a dimension of the housing connector opening is enlarged. Thereby, a circumferential length of the outer seal member configured to close the gap between the flange-shaped portion and the outer surface of the housing is increased. This causes a problem that the waterproof property of the waterproof connector is lowered.The present invention has been made to solve the above-described problem, and has an object to provide a waterproof connector assembly and a method for assembling the same, with which waterproof performance can be improved.Solution of the ProblemThis object is achieved by an arrangement having the features of claim 1, 2 or 3 and a method having the features of claim 12. Advantageous refinements are specified in the dependent claims.Advantageous Effects of the InventionIn a waterproof connector assembly according to an embodiment of the present invention, the annular sealing member is held in contact with each of the connector main body sealing surface and the housing sealing surface to close the gap between the housing and the connector main body. In this way, only the connector base body is inserted into the housing connector opening. Thus, a dimension of the housing connector opening can be reduced. Thereby, a circumferential length of the annular seal member can be reduced. By reducing the circumferential length, the water-tightness of the waterproof connector can be improved.Brief Description of the DrawingsFIG. 1 is a longitudinal section illustrating a power conversion device including a waterproof connector according to a first embodiment for explaining the present invention. FIG. 2 is a longitudinal section illustrating a principal part of the power conversion device of FIG. 1. FIG. 3 is a longitudinal section illustrating a state in which an attachment and detachment direction of FIG. 2 is inclined from a direction perpendicular to a housing sealing surface. FIG. 4 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a second embodiment for explaining the present invention. FIG. 5 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a third embodiment of the present invention. FIG. 6 is a longitudinal section illustrating a modified example of the waterproof connector according to the third embodiment. FIG. 7 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a fourth embodiment of the present invention. FIG. 8 is a longitudinal section illustrating a modified example of the waterproof connector according to the fourth embodiment of the present invention. FIG. 9 is a longitudinal section illustrating a modified example of the waterproof connector according to the fourth embodiment of the present invention. FIG. 10 is a longitudinal section illustrating a modified example of the waterproof connector according to the fourth embodiment of the present invention. FIG. 11 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to the fifth embodiment of the present invention. FIG. 12 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a sixth embodiment of the present invention. FIG. 13 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a seventh embodiment of the present invention. FIG. 14 is a view illustrating a state in which the waterproof connector 8 of FIG. 13 is disassembled. FIG. 15 is a flowchart for illustrating an assembly process of the waterproof connector 8 according to the seventh embodiment of the present invention. FIG. 16 is a longitudinal section illustrating a main part of an energy conversion device including a waterproof connector 8 according to an eighth embodiment of the present invention. FIG. 17 is a longitudinal section illustrating a modified example of the waterproof connector according to the eighth embodiment of the present invention. FIG. 18 is a longitudinal section illustrating a modified example of the waterproof connector according to the eighth embodiment of the present invention. FIG. 19 is a longitudinal section illustrating a modified example of the waterproof connector according to the eighth embodiment of the present invention. FIG. 20 is a longitudinal section illustrating a modified example of the waterproof connector according to the eighth embodiment of the present invention. FIG. 21 is a longitudinal section illustrating a modified example of the waterproof connector according to the eighth embodiment of the present invention.DESCRIPTION OF THE EMBODIMENTSFirst EmbodimentFIG. 1 is a longitudinal section illustrating a power conversion device including a waterproof connector according to a first embodiment for explaining the present invention. A power conversion device will be described as an example of an electronic device having a waterproof connector. The power conversion device includes a water-cooled heat sink 1, a power semiconductor element 2, and a circuit board 3. The circuit board 3 is configured to control the driving of the power semiconductor element 2.The power semiconductor element 2 includes an element main body 21 and a relay terminal 22, and the relay terminal 22 extends from the element main body 21, and the circuit board 3 is disposed to be opposed to the element main body 21. The relay terminal 22 is electrically connected to the circuit board 3.The power conversion device further includes a support case 4 made of a resin disposed between the water-cooled heat sink 1 and the circuit board 3. The carrier case 4 includes a direct current input terminal 41, an alternating current output terminal 42, and a bus bar 43. The bus bar 43 is configured to electrically connect the input terminal 41 and the output terminal 42 to each other. The carrier case 4 is formed by insert molding the input terminal 41, the output terminal 42 and the bus bar 43.A surface of the circuit board 3 on a side opposite to the carrier case 4 is a mounting surface 31. The power conversion device includes a smoothing capacitor 5 and a screw 6. The screw 6 is configured to electrically connect the smoothing capacitor 5 and the input terminal 41 to each other. The smoothing capacitor 5 includes a capacitor main body 51 and a bus bar 52.The power conversion device also comprises a housing 7 made of metal, which can be fastened to the water-cooled cooling body 1. The power semiconductor element 2, the circuit board 3, the resin support case, and the smoothing capacitor 5 are efficiently accommodated in a space surrounded by the water-cooled heat sink 1 and the case 7.A housing connector opening 71 is formed in the housing 7. The power conversion device further includes a waterproof connector 8 mounted on the mounting surface 31 of the circuit board 3. The waterproof connector 8 is inserted into the housing connector opening 71. A part of the waterproof connector 8 is disposed outside the housing 7. A mating connector (not shown) is connectable to the watertight connector 8.FIG. 2 is a longitudinal section illustrating a main part of the power conversion device of FIG. 1 ; the waterproof connector 8 includes a connector main body 81, an annular sealing member 82, a holder 83, and a plurality of fastening members 84. the annular sealing member 82 is provided outside the housing 7 and surrounds the connector main body 81. the holder 83 is configured to press the annular sealing member 82 against the housing 7. The plurality of fastening members 84 are configured to fasten the holder 83 to the housing 7. In this example, the annular seal member 82 is attached to the holder 83. The annular sealing member 82 and the holder 83 may be formed by integral molding by firing.The connector main body 81 includes a plurality of terminals 811 and a housing 812 made of a resin. The plurality of terminals 811 are electrically connectable to the mating connector. The housing 812 is configured to accommodate the plurality of terminals 811. The connector main body 81 is arranged to extend from the circuit board 3 to the outside of the housing 7. A direction in which the mating connector is attached to and detached from the connector main body 81 is referred to as an attachment and detachment direction A.The annular sealing member 82 is held in contact with the connector main body sealing surface 813. The connector main body sealing surface 813 is a portion of an outer surface of the connector main body 81 located outside the housing 7. In addition, the annular sealing member 82 is held in contact with a housing sealing surface 72. The housing sealing surface 72 is a portion of an outer surface of the housing 7 that is disposed in a peripheral edge portion of the housing connector opening 71. In this way, the annular sealing member 82 closes a gap between the housing 7 and the connector main body 81.The annular sealing member 82 includes an outer surface 821 facing a side opposite to the connector main body 81 in a direction along the housing sealing surface 72. Movement of the annular seal member 82 along the housing seal surface 72 with respect to the retainer 83 is restricted.The holder 83 includes a pair of holder side wall portions 831 that clamp the annular sealing member 82 in the direction along the housing sealing surface 72. The holder 83 includes a pair of holder flat plate portions 832. The pair of holder flat plate portions 832 are respectively associated with the pair of holder side wall portions 831 and extend from the holder side wall portions 831 toward the connector main body 81 In addition, the holder 83 includes a pair of holder fixing portions 833. The pair of holder fixing portions 833 are respectively provided on the pair of holder side wall portions 831 and extend from the holder side wall portions 831 in a direction away from the connector main body 81, and the holder side wall portions 831 are opposed to the outer surface 821 of the annular sealing member 82 in the direction along the housing sealing surface 72. In addition, the holder side wall portions 831 are held in contact with the outer surface 821 of the annular sealing member 82.Each of the fasteners 84 is a fastener having a flange. Each of the fastening members 84 includes a shaft portion 841, a head portion 842, and a flange portion 843. The shaft portion 841 is insertable into a screw hole 73 formed in the housing 7. The head portion 842 is formed at one end in the axial direction of the shaft portion 841. The shaft portion 841 includes the flange portion 843. The flange portion 843 is disposed on another end side in the axial direction to the shaft portion 841 with respect to the head portion 842. In addition, the flange portion 843 is disposed so as to overlap the head portion 842.In each of the holder fixing portions 833, a holder fixing hole 834 is formed. Each of the fasteners 84 is insertable into a corresponding retainer mounting hole 834.A positional displacement amount between a center B of the connector main body 81 and a center C of the housing connector hole 71 in the direction along the housing sealing surface 72 is represented by X. An outer diameter of each of the shaft portions 841 is represented by D 1. A dimension of each of the holder fixing holes 834 is represented by D 2. An outer diameter of each of the flange portions 843 is represented by D 3. In this case, the conditions X<(D2-D1) / 2 and D2<D3 are satisfied. Under the above-described conditions, the member (D 2-D 1) / 2 expresses the dimension of a gap between each of the shaft portions 841 and a corresponding holder fixing hole 834 toward the housing sealing surface 72.A positional displacement amount between a center D of the connector main body sealing surface 813 and a center E of the annular sealing member 82 in a direction perpendicular to the housing sealing surface 72 is represented by Z. A dimension of a portion of the annular sealing member 82 held in contact with the connector main body sealing surface 813 in the direction perpendicular to the housing sealing surface 72 is represented by S 1. A dimension of the connector main body sealing surface 813 in the direction perpendicular to the housing sealing surface 72 is represented by S 2. In this case, a condition Z<(S2-S1) / 2 is satisfied.FIG. 3 is a longitudinal section illustrating a state in which the attachment and detachment direction A is inclined from the direction perpendicular to the housing sealing surface 72. When the circuit board 3 is disposed to be inclined with respect to the direction along the housing sealing surface 72, the attachment and detachment direction A is inclined by θ degrees with respect to a direction B perpendicular to the housing sealing surface 72. In this case, in the annular seal member 82, the circumferential crushing of the annular seal member 82 changes, but elastic strain of the annular seal member 82 is inversely proportional to a wire diameter of the annular seal member 82, and therefore, the circumferential crushing of the annular seal member 82 is suppressed from changing by increasing the wire diameter of the annular seal member 82. As a result, the waterproof connector 8 has high sealing performance.As described above, in the waterproof connector 8 according to the first embodiment for explaining the present invention, the annular sealing member 82 is held in contact with the connector main body sealing surface 813 and the housing sealing surface 72, respectively, to close the gap between the housing 7 and the connector main body 81. In this way, only the connector base body 81 is inserted into the housing connector opening 71. Thus, a dimension of the housing connector opening 71 can be reduced. Thereby, a circumferential length of the annular seal member 82 can be reduced. By reducing the circumferential length, the water-tightness of the waterproof connector 8 can be improved.In addition, the annular sealing member 82 is accommodated inside the holder 83 instead of the connector main body 81. In this way, the wire diameter of the annular seal member 82 can be increased. The elastic elongation of the annular seal member 82 is inversely proportional to the wire diameter of the annular seal member 82. Thus, even when the positional displacement amount X between the center B of the connector main body 81 and the center C of the housing connector opening 71 in the direction along the housing sealing surface 72 is increased due to dimensional tolerance or assembly error of each of the components of the power conversion device, to thereby increase variation in the circumferential crushing of the annular seal member 82, variation in the circumferential crushing ratio of the annular seal member 82 can be suppressed. Thereby, the water-tightness of the waterproof connector 8 can be improved.In addition, the annular seal member 82 is not deformed even when the positional displacement amount Z between the center of the connector main body seal surface 813 and the center of the annular seal member 82 in the direction perpendicular to the housing seal surface 72 is large. Thereby, the water-tightness of the waterproof connector 8 can be improved.In addition, even when the attachment and detachment direction A is inclined with respect to the direction B perpendicular to the housing sealing surface 72, in order to increase variation in the circumferential crushing of the annular sealing member 82, variation in the circumferential crushing ratio of the annular sealing member 82 can be suppressed by increasing the wire diameter of the annular sealing member 82. As a result, the water-tightness of the waterproof terminal 8 can be improved.In addition, the connector main body sealing surface 813 is disposed separately from the circuit board 3, so that the wire diameter of the annular sealing member 82 can be increased. In this way, generation of vibrations in the waterproof connector 8 due to vibrations of a motor to which the power conversion device is attachable or due to operational vibrations of a vehicle to which the power conversion device is attachable can be suppressed. Thus, a load generated at the terminals 811 can be reduced. Thereby, the reliability of the power conversion device can be improved.Moreover, even when the positional displacement amount X is large, the holder 83 follows the positional displacement between the center B of the connector main body 81 and the center C of the housing connector hole 71. Thereby, variation in the circumferential crushing of the annular seal member 82 can be suppressed. As a result, the water-tightness of the waterproof terminal 8 can be improved.In addition, a gap between the connector main body sealing surface 813 and a portion of the holder 83 that faces the connector main body sealing surface 813 can be reduced without being affected by the positional displacement amount X. With the decrease in the gap, even when an internal pressure of the housing 7 becomes high against a pressure of the outside air, the outward protrusion of the annular sealing member 82 from a gap between the connector main body 81 and the holder 83 can be suppressed. As a result, the waterproof connector 8 can have high resistance to repeated pressure changes.In addition, the waterproof connector 8 can have high sealing performance even when a positional displacement occurs between the center of the connector main body sealing surface 813 and the center of the annular sealing member 82 in the direction perpendicular to the housing sealing surface 72. Thereby, the water-tightness of the waterproof connector 8 can be improved.Second EmbodimentFIG. 4 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a second embodiment for explaining the present invention. As with each of the fasteners 84, a fastener with a washer is used. Each of the fasteners 84 includes the shaft portion 841, the head portion 842, and a washer 844. The shaft portion 841 is inserted into a corresponding one of the screw holes 73 formed in the housing 7. The head portion 842 is formed at one end in the axial direction of the shaft portion 841. The washer 844 is provided on the shaft portion 841. In other words, each of the fastening members 84 includes a universal screw including the shaft portion 841 and the head portion 842, and the washer 844 fixed to the universal screw. The washer 844 is disposed on another end side of the shaft portion 841 in the axial direction with respect to the head portion 842. In addition, the washer 844 is disposed so as to overlap the head portion 842. In the washer 844, a through hole 845 into which the shaft portion 841 is inserted is formed.A positional displacement amount between a center B of the connector main body 81 and a center C of the housing connector hole 71 in the direction along the housing sealing surface 72 is represented by X. An outer diameter of each of the shaft portions 841 of the fastening members 84 is represented by D 1. A diameter of each of the holder fixing holes 834 is represented by D 2. An inner diameter of each of the washers 844 is represented by D4. An outer diameter of the head portion 842 of each of the fastening members 84 is represented by D 5. An outer diameter of each of the washers 844 is represented by D6. In this case, the conditions X<(D2-D1) / 2 and D4<D5<D2<D6 are satisfied. Other configurations are the same as those of the first embodiment.As described above, in the waterproof connector 8 according to the second embodiment, for explaining the present invention, even when the positional displacement amount X is large, the holder 83 follows the positional displacement between the center B of the connector main body 81 and the center C of the housing connector opening 71. Moreover, each of the fasteners 84 includes the low cost universal screw. With the above-described fastening members, cost reduction of the waterproof terminal 8 can be achieved.Third EmbodimentFIG. 5 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a third embodiment of the present invention. The waterproof connector 8 also includes an outer seal holding member 85 configured to hold the annular seal member 82. The outer seal holding member 85 is formed annularly. The movement of the annular seal member 82 in the direction along the housing seal surface 72 is restricted with respect to the outer seal holding member 85.The outer seal retainer 85 includes a pair of outer retainer side wall portions 851 that clamp the annular seal member 82 toward the housing sealing surface 72. In addition, the outer seal support member 85 includes a pair of outer support member flat plate portions 852. The pair of outer holder flat plate portions 852 are respectively provided on the pair of outer holder side wall portions 851 and extend from the outer holder side wall portions 851 toward the connector main body 81.The holder 83 includes a pair of holder side wall portions 831 that clamp the outer seal holding member 85 in the direction along the housing sealing surface 72. The holder 83 includes a pair of holder flat plate portions 832. The pair of holder flat plate portions 832 are respectively associated with the pair of holder side wall portions 831 and extend from the holder side wall portions 831 toward the connector main body 81 In addition, the holder 83 includes a pair of holder fixing portions 833. The pair of holder fixing portions 833 are respectively provided on the pair of holder side wall portions 831, and extend from the holder side wall portions 831 in a direction away from the connector main body 81.A dimension between the pair of outer holding member flat plate portions 852 is represented by M 1. A dimension between the pair of holder flat plate portions 832 is represented by M 2. A positional displacement amount between the center B of the connector main body 81 and the center C of the housing connector hole 71 in the direction along the housing sealing surface 72 is represented by X. A dimension of the outer seal holding member 85 in the direction along the housing sealing surface 72 is represented by L 1. A dimension between the pair of holder side wall portions 831 is represented by L 2. In this case, the conditions M1<M2and X<(L2-L1) are satisfied. Under the above-described conditions, the member (L 2-L 1) / 2 expresses a gap between the outer seal holding member 85 and the holder 83 in the direction along the housing sealing surface 72. Other configurations are the same as those of the first or second embodiment.As described above, in the waterproof connector 8 according to the third embodiment of the present invention, even when the positional displacement amount X is large, the outer seal holding member 85 follows the positional displacement between the center B of the connector main body 81 and the center C of the housing connector opening 71. Thereby, variation in the circumferential crushing of the annular seal member 82 can be suppressed. Thereby, the water-tightness of the waterproof terminal 8 can be improved.In addition, even when the positional displacement amount X is large, the outer seal holding member 85 follows the positional displacement between the center B of the connector main body 81 and the center C of the housing connector hole 71. With the decrease in the gap, even when an internal pressure of the housing 7 becomes high from an external air pressure, the outward protrusion of the annular seal member 82 from a gap between the connector main body 81 and the outer seal holding member 85 can be suppressed. As a result, the waterproof connector 8 can have high resistance to repeated pressure changes.FIG. 6 is a longitudinal section illustrating a modified example of the waterproof connector according to the third embodiment. In the third embodiment, the embodiment in which the outer seal holding member 85 includes the outer holding member side wall portions 851 and the outer holding member flat plate portions 852 has been described. Meanwhile, the outer seal holding member 85 may include only the side wall portions 851 of the outer holding member without the flat plate portions 852 of the outer holding member. In this case as well, the condition X<(L2-L1) / 2 is satisfied.Fourth EmbodimentFIG. 7 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a fourth embodiment of the present invention. The waterproof connector 8 includes the outer seal holding member 85 and a pair of protrusions 86. the outer seal holding member 85 is configured to hold the annular seal member 82. The pair of protrusions 86 are provided on the housing 7 and clamp the outer seal holding member 85 toward the housing sealing surface 72. In addition, the waterproof connector 8 further includes a pair of fastening members 84. the pair of fastening members 84 are respectively provided on the pair of protrusions 86 and configured to fasten the holder 83 to the protrusions 86. The movement of the annular seal member 82 in the direction along the housing seal surface 72 is restricted with respect to the outer seal holding member 85.The outer seal retainer 85 includes a pair of outer retainer side wall portions 851 that clamp the annular seal member 82 in the direction along the housing sealing surface 72. In addition, the outer seal holding member 85 includes a pair of outer holding member flat plate portions 852. The pair of outer retainer flat plate portions 852 are respectively provided on the pair of outer retainer side wall portions 851 and extend from the outer retainer side wall portions 851 toward the connector main body 81.The holder 83 includes the pair of holder flat plate portions 832. The pair of holder flat plate portions 832 are respectively provided for the pair of projections 86 and extend from the projections toward the connector main body.The fastening elements 84 are fitted into the projections 86, respectively. Thereby, the shaft portion 841 of each of the fastening members 84 does not protrude to the circuit board 3 side with respect to the housing 7. Thereby, an insulation distance between a component 9 to be mounted on the circuit board 3 and each of the fastening members 84 can be secured. This simplifies the layout of the component 9 to be mounted on the printed circuit board 3. In this way, a reduction in the overall size and a reduction in the size of the housing 7 can be achieved. As a result, cost reduction of the housing 7 can be achieved. The plurality of protrusions 86 are arranged such that the connector main body 81, the annular seal member 82, and the outer seal holding member 85 are interposed therebetween toward the housing sealing surface 72.A dimension between the pair of outer retainer flat plate portions 852 is represented by M 1. A dimension between the pair of holder flat plate portions 832 is represented by M 2. A positional displacement amount between the center B of the connector main body 81 and the center C of the housing connector hole 71 in the direction along the housing sealing surface 72 is represented by X. A dimension of the outer seal holding member 85 in the direction along the housing sealing surface 72 is represented by L 1. A dimension between the pair of protrusions 86 is represented by L 3. In this case, the conditions M1<M2and X<(L3-L1) / 2are satisfied. Under the above-described conditions, the (L 3-L 1) / 2 side expresses a gap between the outer seal holding member 85 and the protrusions 86 toward the housing sealing surface 72. Other configurations are the same as those of the first to third embodiments.As described above, in the waterproof connector 8 according to the fourth embodiment, the fastening members 84 do not protrude toward an inner side of the housing 7. Thereby, the insulation distance between the circuit board 3 and the component 9 to be mounted on the circuit board 3 and the fastening members 84 can be secured. This makes it possible to simplify the layout for the component 9 to be mounted on the circuit board 3. In this way, the reduction in the size and the reduction in the size of the housing 7 can be achieved. As a result, the cost reduction of the housing 7 can be achieved.FIG. 8 is a longitudinal section illustrating a modified example of the waterproof connector according to the fourth embodiment. In the fourth embodiment, the embodiment in which the waterproof connector 8 includes the outer seal holding member 85 is described. Meanwhile, the waterproof connector 8 is not required to include the outer seal holding member 85. In this case, the holder 83 includes the pair of holder side wall portions 831 sandwiching the annular sealing member 82 toward the housing sealing surface 72. The pair of protrusions 86 clamps the annular sealing member 82 through the pair of holder side wall portions 831 in the direction along the housing sealing surface 72.FIG. 9 is a longitudinal section illustrating a modified example of the waterproof connector according to the fourth embodiment. In the fourth embodiment, the embodiment in which the outer seal holding member 85 includes the outer holding member side wall portions 851 and the outer holding member flat plate portions 852 is described. Meanwhile, the outer seal holding member 85 may include only the outer holding member side wall portions 851 without the outer holding member flat plate portions 852.FIG. 10 is a longitudinal sectional view illustrating a modified example of the waterproof connector according to the fourth embodiment. In the fourth embodiment, the embodiment in which the waterproof connector 8 includes the protrusions 86 is described. Meanwhile, the waterproof connector 8 is not required to include the protrusions 86. In this case, an annular seal member receiving groove 74 in which the annular seal member 82 is arrangeable may be formed at a peripheral edge of the housing connector hole 71 formed in the housing 7. The outer seal holding member 85 may be disposed in the annular seal member receiving groove 74 together with the annular seal member 82.Fifth EmbodimentFIG. 11 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a fifth embodiment of the present invention. The waterproof connector 8 also includes an inner seal holding member 87 provided between the housing 7 and the annular seal member 82. Movement of the annular seal member 82 toward the housing seal surface 72 with respect to the outer seal support member 85 is restricted.The outer seal support member 85 includes a pair of outer support member side wall portions 851 that clamp the annular seal member 82 in the direction along the housing sealing surface 72. In addition, the outer seal holding member 85 includes a pair of outer holding member flat plate portions 852. The pair of outer retainer flat plate portions 852 are respectively provided on the pair of outer retainer side wall portions 851 and extend from the outer retainer side wall portions 851 toward the connector main body 81.The holder 83 includes a pair of holder side wall portions 831 that clamp the outer seal holding member 85 in the direction along the housing sealing surface 72. The holder 83 includes a pair of holder flat plate portions 832. The pair of holder flat plate portions 832 are respectively associated with the pair of holder side wall portions 831 and extend from the holder side wall portions 831 toward the connector main body 81 In addition, the holder 83 includes a pair of holder fixing portions 833. The pair of holder fixing portions 833 are respectively provided on the pair of holder side wall portions 831, and extend from the holder side wall portions 831 in a direction away from the connector main body 81.The annular seal member 82 has a pair of housing seal surface contact portions 822. The pair of housing sealing surface contact portions 822 clamps the inner seal holding member 87 in the direction along the housing sealing surface 72, and is held in contact with the housing sealing surface 72, respectively.The inner seal holding member 87 includes a pair of inner holding member flat plate portions 871 sandwiching the connector main body 81 in the direction along the housing sealing surface 72.A dimension between the pair of inner retainer flat plate portions 871 is represented by M 3. A dimension of the housing connector opening 71 is represented by M 4. A dimension of the inner seal holding member 87 in the direction along the housing sealing surface 72 is represented by M 5. A dimension between the pair of housing sealing surface contact portions 822 is represented by M 6. In this case, a condition M3<M4<M5<M6 is satisfied. Other configurations are the same as those of the first to fourth embodiments.As described above, in the waterproof connector 8 according to the fifth embodiment of the present invention, the inner seal holding member 87 follows a positional displacement between the center B of the connector main body 81 and the center C of the housing connector opening 71 in the direction along the housing sealing surface 72. With the decrease in the gap, even when an internal pressure in the housing 7 becomes low from an external air pressure, outward protrusion of the annular sealing member 82 from a gap between the connector main body 81 and the housing 7 can be suppressed. As a result, the waterproof connector 8 can have high resistance to repeated pressure changes.Sixth EmbodimentFIG. 12 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a sixth embodiment of the present invention. The pair of inner retainer flat plate portions 871 each have a pair of inclined surfaces 872. The pair of inclined surfaces 872 are formed on a side opposite to the connector main body 81 so as to approach the connector main body 81 toward the housing 7. The annular seal member 82 has a groove 823 into which the pair of inclined surfaces 872 are insertable. With the insertion of the slant surfaces 872 into the groove 823, the inner seal holding member 87 is fitted inside the annular seal member 82. The other embodiments correspond to those of the fifth embodiment.As described above, in the waterproof connector 8 according to the sixth embodiment of the present invention, the inclined surfaces 872 of the inner seal holding member 87 are inserted into the groove 823 of the annular seal member 82. Upon insertion, the inner seal retaining member 87 is secured within the annular seal member 82. Thereby, after the outer seal holding member 85, the annular seal member 82, and the inner seal holding member 87 are attached, the inner seal holding member 87 can be prevented from dropping off the annular seal member 82 when the above-mentioned members are mounted on the housing 7. This can improve ease of assembly of the waterproof connector 8.Seventh EmbodimentFIG. 13 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector according to a seventh embodiment of the present invention. Each of the two inner holding member flat plate portions 871 has a through hole 873 that penetrates the inner holding member flat plate portions 871 in the thickness direction. The annular sealing member 82 includes a sealing member main body 824 and protruding portions 825. The protruding portions 825 are integrally formed with the seal member main body 824 and are inserted into the through holes 873. With the insertion of the protruding portions 825 into the through-holes 873, the inner seal holding member 87 is mounted into the annular seal member 82. Other configurations are the same as those of the fifth or sixth embodiment.Next, an assembly process of the waterproof 8 will be described. FIG. 14 is a view illustrating a state in which the waterproof connector 8 of FIG. 13 is disassembled, and FIG. 15 is a flowchart illustrating an assembly process of the waterproof connector 8 according to the seventh embodiment of the present invention. First, in step S 101, a step of mounting the circuit board is performed. In the step of mounting the circuit board, the circuit board 3 on which the connector main body 81 is mounted is mounted on the carrier housing 4. In addition, in this step, the outer seal holding member 85, the annular seal member 82, and the inner seal holding member 87 are assembled.Thereafter, in step S 102, an installation step of the circuit board is performed. In the circuit board installation step, the circuit board 3 is installed inside the housing 7 so that the connector main body 81 is inserted into the housing connector opening 71.Thereafter, in step S 103, an installation step of an annular sealing member is performed. In the annular seal member installation step, the outer seal holding member 85, the annular seal member 82, and the inner seal holding member 87 are installed on the housing 7 so that the annular seal member 82 is brought into contact with the connector main body sealing surface 813 and the housing sealing surface 72, respectively.Thereafter, in step S 104, a pressing step of the annular sealing member is performed. In the pressing step of the annular seal member d, the holder 83 is installed to the housing 7 so as to press the annular seal member 82 against the housing 7.Thereafter, in step S 105, a step of fixing the holder is performed. In the holder fixing step, the holder 83 is fixed to the housing 7 by the fixing members 84. Through the above-described steps, the assembly of the waterproof connector 8 is completed.As described above, in the waterproof connector 8 according to the seventh embodiment of the present invention, the protruding portions 825 of the annular seal member 82 are inserted into the through hole 873 of the inner seal holding member 87. Upon insertion, the inner seal retaining member 87 is assembled into the annular seal member 82. Thereby, after assembling the outer seal holding member 85, the annular seal member 82, and the inner seal holding member 87, the inner seal holding member 87 can be prevented from dropping off the annular seal member 82 when the above-mentioned members are mounted on the housing 7. This enables the simplified assembly of the watertight connector 8 to be improved.In addition, in the method of assembling the waterproof connector 8 according to the seventh embodiment, the annular sealing member 82 is held in contact with each of the connector main body sealing surface 813 and the housing sealing surface 72 to close the gap between the housing 7 and the connector main body 81. In this way, only the connector base body 81 is inserted into the housing connector opening 71. In this way, a dimension of the housing connector opening 71 can be reduced. Thereby, a circumferential length of the annular seal member 82 can be reduced. By reducing the circumferential length, the water-tightness of the waterproof connector 8 can be improved.Eighth EmbodimentFIG. 16 is a longitudinal section illustrating a main part of a power conversion device including a waterproof connector 8 according to an eighth embodiment of the present invention. The annular sealing member 82 includes a first sealing member 826 held in contact with the connector main body sealing surface 813 and a second sealing member 827 held in contact with the housing sealing surface 72. The first sealing member 826 and the second sealing member 827 are separated from each other. The first sealing element 826 and the second sealing element 827 are each formed annularly.The outer seal holding member 85 includes a pair of seal member holding side wall portions 853 that clamp the first seal member 826 toward the housing sealing surface 72. The outer seal holding member 85 has a second seal member receiving groove 854 in which the second seal member 827 is receivable. The second seal member receiving groove 854 is formed by the first seal member holding side wall portions 853, the holding member outer side wall portions 851, and the holding member outer flat plate portions 852. Other configurations are the same as those of any of the first to seventh embodiments.As described above, in the waterproof connector 82 according to the eighth embodiment of the present invention, the annular sealing member 82 includes the first sealing member 826 held in contact with the connector main body sealing surface 813 and the second sealing member 827 held in contact with the housing sealing surface 72. In addition, the first sealing member 826 and the second sealing member 827 are separated from each other. Thereby, the first sealing member 826 and the second sealing member 827 can be arranged so that their compression possibilities do not influence each other.In addition, the outer seal holding member 85 includes the pair of first seal member holding side wall portions 853 that clamp the first seal member 826 in the direction along the housing sealing surface 72. The outer seal holding member 85 has the second seal member receiving groove 854 in which the second seal member 827 is arrangeable. In the above-described embodiment, the first sealing member 826 and the second sealing member 827 may be separately mounted on the outer seal holding member 85.FIG. 17 is a longitudinal section illustrating a modified example of the waterproof connector according to the eighth embodiment. In the eighth embodiment, the embodiment in which the outer seal holding member 85 includes the outer holding member flat plate portions 852 is described. Meanwhile, the outer seal holding member 85 is not required to have the outer holding member flat plate portions 852. In this case, the outer seal holding member 85 includes the first seal member side wall portions 853 and the outer holding member side wall portions 851. In this case, the waterproof connector 8 may include the protrusions 86.FIG. 18 is a longitudinal section illustrating a modified example of the waterproof connector according to the eighth embodiment. In the eighth embodiment, the embodiment in which the waterproof connector 8 does not include the protrusions 86 is described. Meanwhile, the waterproof connector 8 may include the protrusions 86.FIG. 19 is a longitudinal section illustrating a modified example of the waterproof connector according to the eighth embodiment. In the eighth embodiment, the embodiment in which the waterproof connector 8 includes the outer seal holding member 85 is described. Meanwhile, the waterproof connector 8 is not required to include the outer seal holding member 85. In this case, the holder 83 includes a pair of first holder side wall portions 835 and a pair of second holder side wall portions 836. The pair of first holder side wall portions 835 clamp the first seal member 826 in the direction along the housing sealing surface 72. The pair of second holder side wall portions 836 clamps the second sealing member 827 in the direction along the housing sealing surface 72. A second seal member receiving groove 837 is formed by the first holder side wall portion 835, the second holder side wall portion 836, and the holder flat plate portion 832. The second seal member 827 is disposed in the second seal member receiving groove 837.FIG. 20 is a longitudinal section illustrating a modified example of the waterproof connector according to the eighth embodiment. In the eighth embodiment, the embodiment in which the outer seal holding member 85 includes the first seal member holding side wall portions 853 is described. Meanwhile, the outer seal holding member 85 may further include first seal member holding flat plate portions 855 provided on the first seal member holding side wall portions 853 and disposed between the first seal member 826 and the housing sealing surface 72.FIG. 21 is a longitudinal sectional view illustrating a modified example of the waterproof connector according to the eighth embodiment. In the eighth embodiment, the embodiment in which the first seal member 826 is held inside the outer seal holding member 85 is described. Meanwhile, the first sealing member 826 may be held in the connector main body 81. In this case, the connector main body 81 has a first sealing member receiving groove 814 in which the first sealing member 826 is receivable.List of reference characters1 Water-cooled heat sink, 2 power semiconductor element, 3 circuit board, 4 carrier case, 5 smoothing capacitor, 6 screw, 7 case, 8 waterproof connector, 9 component, 11 surface, 21 element main body, 22 relay terminal, 31 fixing surface, 41 input terminal, 42 output terminal, 43 bus bar, 51 capacitor main body, 52 bus bar, 71 case connector opening, 72 case sealing surface, 73 screw hole, 74 annular sealing element accommodation groove, 81 connector main body, 82 annular sealing element, 83 holder, 84 fixing element, 85 outer seal holding member, 86 protrusion, 87 inner seal holding member, 811 terminal, 812 case, 813 connector main body sealing surface, 814 first seal element accommodation groove, 821 outer surface, 822 case sealing surface contact portions, 823 groove, 824 seal element main body, 825 protruding portions, 826: first sealing member, 827: second sealing member, 831: holder side wall portions, 832: holder flat plate portions, 833: holder fixing portions, 834: holder fixing hole, 835: first holder side wall portions, 836: second holder side wall portions, 837: second sealing member accommodating groove, 841: shaft portion, 842: head portion, 843: flange portion, 844: washer, 845: through hole, 851: outer holding member side wall portion, 852: outer holding member flat plate portion, 853: first sealing member holding side wall portions, 854: second sealing member accommodating groove, 855: first sealing member holding flat plate portion, 871: inner holding member flat plate portion, 872: inclined surface, 873: through hole

Claims

An assembly comprising a waterproof connector (8), a circuit board (3), a housing (7), an annular sealing member (82), and a holder (83), wherein the circuit board (3) is disposed in the housing (7), the waterproof connector (8) includes a connector main body (81) that is mounted on the circuit board (3) and inserted into a housing connector opening (71) formed in the housing (7); the annular sealing member (82) is disposed outside the housing (7) and surrounds the connector main body (81); the holder (83) is configured to press the annular sealing member (82) against the housing (7), the annular sealing member (82) is held in contact with a connector main body sealing surface (813) of the connector main body (81) and a housing sealing surface (72) of the housing (7), An arrangement for closing a gap between the housing (7) and the connector main body (81), the arrangement further comprising an outer seal holding member (85) configured to hold the annular seal member (82), wherein movement of the annular seal member (82) in a direction along the housing sealing surface (72) is restricted with respect to the outer seal holding member (85), the outer seal holding member (85) having a pair of outer holding member side wall portions (851) sandwiching the annular seal member (82) in the direction along the housing sealing surface (72), the holder (83) comprising: a pair of holder side wall portions (831) sandwiching the outer seal holding member (85) in the direction along the housing sealing surface (72); and a pair of holder flat plate portions (832), wherein, at each holder side wall portion (831) of the pair of holder side wall portions (831), a holder flat plate portion (832) of the pair of holder flat plate portions (832) is disposed, each holder flat plate portion (832) of the pair of holder flat plate portions (832) extends from a holder side wall portion (831) of the pair of holder side wall portions (831) toward the connector main body (81), and wherein, when a positional displacement amount between a center of the connector main body (81) and a center of the housing connector opening (71) in the direction along the housing sealing surface (72) is represented by X, a dimension of the outer seal holding member ( 85) in the direction along the housing sealing surface ( 72) is represented by L 1, and a dimension between the pair of holder side wall portions ( 831) is represented by L 2, a condition X<(L 2-L 1) / 2 is satisfied.An assembly comprising a waterproof connector (8), a circuit board (3), a housing (7), an annular sealing member (82), and a holder (83), wherein the circuit board (3) is disposed in the housing (7), the waterproof connector (8) includes a connector main body (81) mounted on the circuit board (3) and inserted into a housing connector opening (71) formed in the housing (7); the annular sealing member (82) is disposed outside the housing (7) and surrounds the connector main body (81); the holder (83) is configured to press the annular sealing member (82) against the housing (7), the annular sealing member (82) is held in contact with a connector base sealing surface (813) of the connector base (81) and a housing sealing surface (72) of the housing (7) to close a gap between the housing (7) and the connector base (81), the arrangement further comprising: a pair of protrusions (86) disposed on the housing (7) and sandwiching the annular sealing member (82) in a direction along the housing sealing surface (72); and fastening elements (84), which are each arranged on a projection (86) of the pair of projections (86) and are configured to fasten the holder (83) to the projections (86), wherein the holder (83) has a pair of holder flat plate portions (832), wherein each holder flat plate portion (832) of the pair of holder flat plate portions (832) is arranged on a projection (86) of the pair of projections (86) and extends from the projection (86) on which it is arranged in the direction of the connector base body (81).An assembly comprising a waterproof connector (8), a circuit board (3), a housing (7), an annular sealing member (82), and a holder (83), wherein the circuit board (3) is disposed in the housing (7), the waterproof connector (8) includes a connector main body (81) that is mounted on the circuit board (3) and inserted into a housing connector opening (71) formed in the housing (7); the annular sealing member (82) is disposed outside the housing (7) and surrounds the connector main body (81); the holder (83) is configured to press the annular sealing member (82) against the housing (7), the annular sealing member (82) is held in contact with a connector main body sealing surface (813) of the connector main body (81) and a housing sealing surface (72) of the housing (7), A method for closing a gap between the housing (7) and the connector main body (81), wherein the annular sealing member (82) comprises a first sealing member (826) held in contact with the connector main body sealing surface (813) and a second sealing member (827) held in contact with the housing sealing surface (72), and wherein the first sealing member (826) and the second sealing member (827) are separated from each other, the arrangement further comprising an outer seal holding member (85) configured to hold the annular sealing member (82), wherein the outer seal holding member (85) has a pair of first sealing member holding side wall portions (853) sandwiching the first sealing member (826) in a direction along the housing sealing surface (72), and wherein the outer seal holding member (85) has a second seal member receiving groove (854) in which the second seal member (827) is received.The assembly according to any one of claims 1 to 3, further comprising a flange-shaped fixing member (84) configured to fix the holder (83) to the housing (7), wherein the holder (83) has a holder fixing hole (834) into which the flange-shaped fixing member (84) is inserted, wherein movement of the annular sealing member (82) along the housing sealing surface (72) is restricted with respect to the holder (83), and wherein when a positional displacement amount between a center of the connector main body (81) and a center of the housing connector opening (71) in a direction along the housing sealing surface (72) is represented by X, an outer diameter of a shaft portion (841) of the flange-shaped fixing member (84) is represented by D1, a diameter of the holder fixing hole (834) is represented by D2, and an outer diameter of a flange portion (843) of the flange-shaped fixing member (84) is represented by D3, which satisfies conditions of X<(D2-D1) / 2 and D2<D3.The assembly according to any one of claim 3, further comprising: a fixing member (84) configured to fix the holder (83) to the housing (7); and a washer (844) disposed between a head portion (842) of the fixing member (84) and the holder (83), the holder (83) having a holder fixing hole (834) into which the fixing member (84) is inserted, wherein a movement of the annular sealing member (82) along the housing sealing surface (72) with respect to the holder (83) is restricted, wherein when a positional displacement amount between a center of the connector main body (81) and a center of the housing connector opening (71) in a direction along the housing sealing surface (72) is represented by X, an outer diameter of a shaft portion (841) of the fixing member (84) is represented by D 1, a diameter of the holder fixing hole (834) is represented by D 2, an inner diameter of the washer (844) is represented by D 4, an outer diameter of the head portion (842) of the fixing member (84) is represented by D 5, and an outer diameter of the washer (844) is represented by D 6, which satisfy conditions of X<(D 2-D 1) / 2, and D4<D5<D2<D6.The assembly according to claim 1, wherein the outer seal holding member (85) has a pair of outer holding member flat plate portions (852), wherein at each outer holding member side wall portion (851) of the pair of outer holding member side wall portions (851) is disposed an outer holding member flat plate portion (852) of the pair of outer holding member flat plate portions (852), each outer holding member flat plate portion (852) of the pair of outer holding member flat plate portions (852) extends from an outer holding member side wall portion (851) of the pair of outer holding member side wall portions (851) toward the connector main body (81), and wherein when a dimension between the pair of outer holding member flat plate portions (852) is represented by M1 and a dimension between the pair of holding member flat plate portions (832) is represented by M2, a condition M1<M2 is satisfied.The assembly of claim 1 or 6, further comprising: a pair of protrusions (86) disposed on the housing (7) and sandwiching the annular sealing member (82) in the direction along the housing sealing surface (72); and fasteners (84), wherein each protrusion (86) of the pair has protrusions (86) of one of the fasteners (84) disposed thereon, the fasteners (84) configured to fasten the retainer (83) to the protrusions (86), wherein each retainer flat plate portion (832) of the pair of retainer flat plate portions (832) is disposed on a protrusion (86) of the pair of protrusions (86) and extends from the protrusion (86) on which it is disposed toward the connector main body (81).The assembly according to any one of claims 1, 6 or 7, further comprising an inner seal holding member (87) provided between the annular seal member (82) and the housing (7), wherein the annular seal member (82) has a pair of housing seal surface contact portions (822) that sandwich the inner seal holding member (87) in the direction along the housing seal surface (72) and are held in contact with the housing seal surface (72), wherein the inner seal holding member (87) has a pair of inner holding member flat plate portions (871) that sandwich the connector main body (81) in the direction along the housing seal surface (72), and wherein when a dimension between the pair of inner holding member flat plate portions (871) is represented by M3, a dimension of the housing connector opening (71) is represented by M4, a dimension of the inner seal holding member ( 87) in the direction along the housing sealing surface ( 72) is represented by M 5, and a dimension between the pair of housing sealing surface contact portions ( 822) is represented by M 6, a condition M3<M4<M5<M6 is satisfied.The assembly according to claim 8, wherein the pair of inner retainer flat plate portions (871) have a pair of inclined surfaces (872); each inner retainer flat plate portion (871) of the pair of inner retainer flat plate portions (871) has an inclined surface (872) of the pair of inclined surfaces (872) on a side of the inner retainer flat plate portion (871) that is opposite to the connector main body (81); each inclined surface (872) of the pair of inclined surfaces (872) approaches the connector main body (81) in a direction toward the housing (7), and wherein the annular sealing member (82) has a groove (823) into which the pair of inclined surfaces (872) is inserted.The assembly according to claim 8 or 9, wherein the pair of inner holding member flat plate portions (871) have through-holes (873) that respectively penetrate the inner holding member flat plate portions (871) in a thickness direction, and wherein the annular sealing member (82) has a sealing member main body (824) and protruding portions (825) that are integrally formed with the sealing member main body (824) and are respectively fittable into the through-holes (873).The assembly according to any one of claims 1 to 10, wherein when a positional displacement amount between a center of the connector main body sealing surface (813) and a center of the annular sealing member (82) in a direction perpendicular to the housing sealing surface (72) is represented by Z, a dimension of a portion of the annular sealing member (82) held in contact with the connector main body sealing surface (813) in the direction perpendicular to the housing sealing surface (72) is represented by S1, and a dimension of the connector main body sealing surface (813) in the direction perpendicular to the housing sealing surface (72) is represented by S2, a condition Z<(S2-S1) / 2 is satisfied.A method of assembling an assembly including a waterproof connector (8), a circuit board (3), a housing (7), an annular sealing member (82), and a holder (83), the method comprising: an installation step of the circuit board (3) for installing the circuit board (3) inside the housing (7) so that a connector main body (81) of the waterproof connector (8) is inserted into a housing connector opening (71) formed in the housing (7); an annular sealing member installation step (82) of, after the circuit board installation step (3), attaching the annular sealing member (82) to the housing (7) so that the annular sealing member (82) is brought into contact with a connector main body sealing surface (813) of the connector main body (81) and a housing sealing surface (71) of the housing (7) to close a gap between the housing (7) and the connector main body (81); and an annular sealing member pressing step (82) of, after the annular sealing member installation step (82), attaching the holder (83) to the housing (7) to press the annular sealing member (82) against the housing (7).

Images