JP5955665B2 - Connector sealing structure and connector sealing method - Google Patents

Description

  The present invention relates to a connector sealing structure and a connector sealing method.

  Conventionally, as a sealing structure of a connector, a high-voltage electric wire bent into an L shape, a terminal connected to the terminal portion of the high-voltage electric wire and having a connecting portion on the opposite side of the terminal portion, and a terminal portion of the high-voltage electric wire inside It is known that a rubber boot as a waterproof member is closely attached to a high-voltage electric wire and the inside of the housing is sealed, and a rubber plug is inserted into the terminal portion side of the high-voltage electric wire to seal the inside of the housing. (For example, refer to Patent Document 1).

  In this connector seal structure, the housing is composed of a plurality of divided members. When the housing is assembled, a high-voltage electric wire fitted with rubber boots is arranged, and a plurality of divided members and rubber plugs are assembled to the high-voltage electric wire. Yes.

  In such a connector sealing structure, a potting material such as silicon is not used, and the time required for solidifying the potting material by using the potting material, the cost for the amount of the potting material used, and the like are reduced.

JP 2010-211195 A

  However, in the connector seal structure as described in Patent Document 1, since there are many waterproof members such as rubber boots and rubber plugs, the housing has been enlarged in order to secure a space for arranging these waterproof members. In addition, since the housing is composed of a plurality of divided members as well as the waterproof member, the number of parts is very large.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a connector sealing structure and a connector sealing method capable of reducing the number of parts while reducing the size of the housing.

According to the first aspect of the present invention, there is provided a covered electric wire in which an outer periphery of a core wire portion is covered with a covering portion, a terminal connected to a terminal portion of the covered electric wire and having a connecting portion on the opposite side of the terminal portion, A connector sealing structure including a housing in which a terminal portion is disposed, wherein the covering portion of the covered electric wire and the housing are made of a thermoplastic resin, and the terminal portion of the covering electric wire is buried in the connecting portion of the terminal and the cover portion of the covered wire is exposed to the outside, between the said and the covering portion of the covered electric wire housing exposed to the outside from the housing, a cylindrical shape is waterproof member and the end portion of the covering portion of the covered electric wire and the covered wire is inserted the housing-side end portion to the inside is fixed penetrates the surface of said coated electric wire before and Symbol housing provided is The prevention At the end of the covering portion of the covered wire members, wherein said wrinkle portion radially outward of the covered wire with one member continuous with the waterproof member.

  In this connector sealing structure, the housing made of thermoplastic resin is molded by arranging the terminal portion of the covered electric wire inside and exposing the terminal connecting portion and the covered electric wire covering portion to the outside. It is not composed of a plurality of divided members, and the number of parts can be reduced.

  Further, since the housing and the terminal are brought into close contact with each other by molding of the housing, it is not necessary to provide a waterproof member between the housing and the terminal, and the number of parts can be reduced.

  In addition, a waterproof member is provided between the covering portion of the covered electric wire and the housing, in which the end portion on the housing side and the end portion on the covering portion side of the covered electric wire are fixed to the housing and the covered electric wire by thermal bonding. Therefore, it is possible to prevent water and the like from entering the housing from the coated electric wire side, and it is not necessary to provide a waterproof member in the housing, and the housing can be downsized.

  Therefore, in such a connector sealing structure, the covered portion of the covered electric wire and the housing are made of a thermoplastic resin, the housing is molded, and the waterproof member is fixed to the housing and the covered portion of the covered electric wire by thermal bonding. Therefore, the housing can be reduced in size and the number of parts can be reduced.

According to a second aspect of the present invention, there is provided a first step of connecting a terminal by removing a covering portion of a terminal portion of a covered electric wire having a covering portion made of a thermoplastic resin, and the connecting portion of the terminal and the covered electric wire by a thermoplastic resin. A second step of molding the housing by exposing the covering portion of the covering wire to the outside and positioning the terminal portion of the covering wire inside, and inserting a cylindrical waterproof member through the covering wire to the outside from the housing A third step of disposing the waterproof member between the exposed covering portion of the covered electric wire and the housing; and heat-bonding the waterproof member and the housing by heating an end portion of the waterproof member on the housing side And a pair of thermocompression-bonding molds that heat-bond the waterproof member and the coated electrical wires by sandwiching and heating the end portion of the sheathing-wire side of the waterproofing member with a pair of thermocompression-bonding molds. of Wherein a connector seal method characterized by having a fifth step of processing the wrinkles of the waterproof member to form a wrinkled portion so as to enter the waterproof member.

  In this connector sealing method, since the housing is molded by a thermoplastic resin, the number of parts of the housing can be reduced, and the assembly process of the housing can be reduced.

  Further, since the housing and the terminal are brought into close contact with each other by molding of the housing, it is not necessary to provide a waterproof member between the housing and the terminal, and the number of parts can be reduced.

  Furthermore, since the waterproof member is fixed to the covering portion of the covered electric wire and the housing by thermal bonding, it is possible to prevent water and the like from entering the housing from the covered electric wire side, and the waterproof member is inserted into the housing. There is no need to provide the housing, and the housing can be downsized.

  Therefore, in such a connector sealing method, the covered portion of the covered electric wire and the housing are made of a thermoplastic resin, the housing is molded, and the waterproof member is fixed to the housing and the covered portion of the covered electric wire by thermal bonding. Therefore, the housing can be reduced in size and the number of parts can be reduced.

  According to the present invention, it is possible to provide a connector sealing structure and a connector sealing method capable of reducing the number of parts while reducing the size of the housing.

(A) is a perspective view of the seal structure of the connector which concerns on embodiment of this invention. (B) is sectional drawing of Fig.1 (a). (A) is a perspective view when the covered electric wire and the terminal of the sealing structure of the connector which concern on embodiment of this invention are connected. FIG. 3B is a perspective view when the housing is molded from the state of FIG. (C) is sectional drawing of FIG.2 (b). (A) is a principal part enlarged view of the seal structure of the connector which concerns on embodiment of this invention. (B) is sectional drawing when the wrinkle process by the side of the covered electric wire of the waterproof member of the seal structure of the connector which concerns on embodiment of this invention is carried out.

  A connector sealing structure and a connector sealing method according to an embodiment of the present invention will be described with reference to FIGS.

  The connector 1 according to the present embodiment has a sealing structure in which the outer circumference of the core wire portion 3 is connected to the covered portion 5 and the terminal portion 9 of the covered wire 7 connected to the opposite side of the terminal portion 9. The terminal 13 which has the part 11 and the housing 15 in which the terminal part 9 of the covered electric wire 7 is arrange | positioned are provided.

  And the coating | coated part 5 and the housing 15 of the covered electric wire 7 consist of thermoplastic resins, and the housing 15 arrange | positions the terminal part 9 of the covered electric wire 7 inside, the connection part 11 of the terminal 13, and the coating | coated part of the covered electric wire 7. 5 is exposed to the outside, is molded, and is formed in a cylindrical shape between the covering portion 5 of the covered electric wire 7 exposed to the outside from the housing 15 and the housing 15, and the covered electric wire 7 is inserted into the housing. A waterproof member 17 is provided in which the end on the 15 side and the end on the covering 5 side of the covered electric wire 7 are fixed to the housing 15 and the covered electric wire 7 by thermal bonding.

  As shown in FIGS. 1 to 3, the connector 1 includes a covered electric wire 7, a terminal 13, a housing 15, and a waterproof member 17.

  The covered electric wire 7 has a core wire portion 3 made of a plurality of conductors made of an alloy such as aluminum (Al), copper (Cu), tin (Sn), and the outer periphery of the core wire portion 3 is made of a thermoplastic resin. 5 is covered.

  The covered electric wire 7 is disposed between the power source and the device, and is supplied to the device from the power source or between the two devices, and is applied to electrical connection between the devices. Such a covered electric wire 7 is provided with a terminal portion 9 from which the core wire portion 3 is exposed by removing the covering portion 5 at an end, and a terminal 13 is electrically connected to the terminal portion 9.

  The terminal 13 is formed in an L shape from a conductive material such as a copper alloy, and includes a wire crimping portion 19 and a connection portion 11. The wire crimping portion 19 includes a covering crimping portion 21 and a core wire crimping portion 23.

  The covered crimp portion 21 is composed of a pair of crimped pieces, and the covered wire 7 and the terminal 13 are integrally fixed by crimping the covered portion 5 at the terminal portion 9 of the covered wire 7. The core wire crimping portion 23 is composed of a pair of crimping pieces provided between the connection portion 11 and the coated crimping portion 21, and the core wire portion 3 is crimped at the terminal portion 9 of the coated electric wire 7 to connect the coated electric wire 7 and the terminal. 13 is electrically connected.

  The connection part 11 is composed of a tab-like male connection part formed by being bent about 90 degrees from the wire crimping part 19. The connecting portion 11 is inserted into a female connecting portion formed in a box shape of a mating terminal (not shown) accommodated in a mating connector (not shown) to which the connector 1 is fitted, or provided in a device or the like. It is fixed to the connected part and electrically connected.

  The wire crimping portion 19 side of the terminal 13 and the terminal portion 9 side of the covered wire 7 are positioned inside the housing 15 by molding the housing 15.

  The housing 15 is made of a thermoplastic resin, and the terminal portion 9 side of the covered wire 7 and the wire crimping portion 19 side of the terminal 13 are disposed inside, and the connection portion 11 of the terminal 13 and the covering portion 5 of the covered wire 7 are externally provided. The mold is formed so as to be exposed. An outer periphery of the housing 15 is provided with an assembly groove 27 into which a packing 25 for sealing between the housing 15 and the mating connector when assembled with the mating connector.

  Here, as for the thermoplastic resin which is a material for the housing 15 and the covering portion 5 of the covered electric wire 7, examples of the housing 15 include polystyrene resin, polyamide resin, polyester resin, modified polyphenylene ether, polyphenylene sulfide and the like. . Examples of the covering portion 5 include a polyethylene resin, a polypropylene resin, and a polyvinyl chloride resin.

  A waterproof member 17 is provided between the housing 15 and the covering portion 5 of the covered electric wire 7 exposed from the housing 15 to the outside.

  The waterproof member 17 is made of a membrane filter, is formed in a cylindrical shape, and the covered electric wire 7 is inserted therein. The waterproof member 17 is disposed at a boss-shaped housing fixing portion 29 formed on the housing 15 at an end portion on the housing 15 side, and an end portion on the coated electric wire 7 side is connected to a covering fixing portion 31 on the outer periphery of the covering portion 5. Be placed.

  The waterproof member 17 arranged in this way first heats the surface of the housing fixing part 29, which is a thermoplastic resin, by heating the housing fixing part 29 side with a jig or the like at the melting point of the resin used + 20 ° C. for 1 second, The waterproof member 17 is inserted into the softened surface and thermally bonded. Next, similarly to the housing fixing portion 29 side, the covering fixing portion 31 side is heated to soften the surface of the covering portion 5 that is a thermoplastic resin, and the waterproof member 17 is inserted into the softened surface and thermally bonded. .

  As shown in FIG. 3B, the wrinkle of the waterproof member 17 formed by thermal bonding on the covering fixing portion 31 side is sandwiched between a pair of thermocompression-bonding dies 33, 35, and a pair of thermocompression-bonding dies 33, 35. The wrinkle portion 37 is gathered and processed so as to go in between.

  Thus, by fixing the waterproof member 17 to the housing 15 and the covered electric wire 7 by heat bonding, water or the like can be prevented from entering the inside of the housing 15 along the surface of the covered electric wire 7 from the covered electric wire 7 side. The connector 1 can be sealed.

  Next, the sealing method of the connector 1 in this Embodiment is demonstrated. First, the covering portion 5 of the terminal portion 9 of the covered electric wire 7 is removed, and the electric wire crimping portion 19 of the terminal 13 is crimped to the terminal portion 9 to connect the covered electric wire 7 and the terminal 13 (first step).

  Next, the connecting portion 11 of the terminal 13 and the covering portion 5 of the covered electric wire 7 are exposed to the outside by the thermoplastic resin, and the terminal portion 9 side of the covered electric wire 7 and the electric wire crimping portion 19 side of the terminal 13 are positioned inside. Then, the housing 15 is molded so as to cause (second step).

  Next, the tubular waterproof member 17 is inserted into the covered electric wire 7, and both ends of the waterproof member 17 are arranged on the outer periphery of the outer peripheral portion of the covered portion 5 of the covered electric wire 7 that is exposed to the outside from the housing 15. It arrange | positions to the covering fixing | fixed part 31 (3rd process).

  Then, the housing fixing portion 29 side of the waterproof member 17 is heated to thermally bond the waterproof member 17 and the housing 15 (fourth process), and the waterproof fixing member 17 side of the waterproof member 17 is heated to cover the waterproof member 17. The electric wire 7 is thermally bonded (fifth step).

  In such a seal structure of the connector 1, the housing 15 made of a thermoplastic resin arranges the terminal portion 9 of the covered electric wire 7 inside and exposes the connecting portion 11 of the terminal 13 and the covered portion 5 of the covered electric wire 7 to the outside. Thus, the housing 15 is not composed of a plurality of divided members, and the number of parts can be reduced.

  Further, since the housing 15 and the terminal 13 are brought into close contact with each other by molding of the housing 15, it is not necessary to provide a waterproof member between the housing 15 and the terminal 13, and the number of parts can be reduced.

  Furthermore, between the covering portion 5 of the covered wire 7 and the housing 15, the end portion on the housing 15 side and the end portion on the covering portion 5 side of the covered wire 7 are fixed to the housing 15 and the covered wire 7 by thermal bonding. Since the waterproof member 17 is provided, it is possible to prevent water and the like from entering the housing 15 from the covered electric wire 7 side, and it is not necessary to provide the waterproof member 17 in the housing 15. Can be miniaturized.

  Therefore, in such a sealing structure of the connector 1, the covering portion 5 of the covered electric wire 7 and the housing 15 are made of a thermoplastic resin, the housing 15 is molded, and the waterproof member 17 is covered with the covering portion of the housing 15 and the covering electric wire 7. Therefore, the housing 15 can be miniaturized and the number of parts can be reduced.

  Further, in the connector 1 sealing method, since the housing 15 is molded by a thermoplastic resin, the assembly process of the housing 15 can be reduced by reducing the number of parts of the housing 15.

  In the connector seal structure according to the embodiment of the present invention, the terminal connection portion is a tab-shaped male terminal, but the present invention is not limited to this, and the terminal connection portion is a box-shaped female terminal. For example, the shape of the terminal may be appropriately selected according to the mating terminal or the connection part of the device.

DESCRIPTION OF SYMBOLS 1 ... Connector 3 ... Core wire part 5 ... Covering part 7 ... Covered electric wire 9 ... Terminal part 11 ... Connection part 13 ... Terminal 15 ... Housing 17 ... Waterproofing member

Claims (2)

A covered electric wire whose outer periphery of the core wire portion is covered with a covering portion, a terminal connected to a terminal portion of the covered electric wire and having a connecting portion on the opposite side of the terminal portion, and a terminal portion of the covered electric wire are disposed inside. A connector sealing structure including a housing,
The covering portion of the covered electric wire and the housing is made of a thermoplastic resin, wherein the housing, the terminal portion of the covered wire is embedded inside the coating unit and the dew outside the covered electric wire and the connecting portion of the terminal Between the covered portion of the covered electric wire that is exposed and exposed to the outside from the housing and the housing, the covered electric wire is inserted into the tube, and the end on the housing side and the covered electric wire and the end portion of the covering portion is secured enters the surface of said coated electric wire before and Symbol housing waterproof member is provided,
An end portion of the waterproof member on the side of the covered portion of the covered electric wire is provided with a wrinkle portion toward the radially outer side of the covered electric wire by one member continuous with the waterproof member . Seal structure. The first step of connecting the terminal by removing the covering portion of the end portion of the covered electric wire having the covering portion made of thermoplastic resin, and exposing the connecting portion of the terminal and the covering portion of the covered electric wire to the outside by the thermoplastic resin A second step of molding the housing by positioning the terminal portion of the covered electric wire inside, and a covering portion of the covered electric wire that is exposed to the outside by inserting a cylindrical waterproof member through the covered electric wire A third step of disposing the waterproof member between the housing and the housing; a fourth step of heating the end of the waterproof member on the housing side to thermally bond the waterproof member and the housing; entering the waterproof member between the pair of thermal compression type and the waterproof member the ends of the covering portion of the covered wire is heated by sandwiching a pair of thermal compression type member and the covered wire is thermally bonded Connector sealing method characterized in that it comprises a fifth step of unnecessarily treating wrinkles of the waterproof member to form a wrinkled portion.

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