JP2011070848A - Shielded connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shielded connector which can prevent pollution of a self-connector and a counterpart connector caused by water immersion in a shield crimping space without degradation of productivity and an increase in manufacturing cost. <P>SOLUTION: An end part of a plug member 51 mounted on an open end side of an electric wire end part housing cylinder part 33 of a connector housing 7 for inserting a shield wire 3, is sealed by a cylindrical seal packing 53 with one end side fitted to an inner circumference of the plug member 51 and other end side projecting in a shield crimping space 35 formed in a middle of the electric wire end part housing cylinder part 33, and a first seal cap 55 with one end side fitted to an outer circumference of the plug member 51 and other end side fitted to an outer circumference of other end part of the seal packing 53. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a shielded connector, and more particularly to an improvement for improving waterproofness.

  The connector housing of the shield connector has a terminal accommodating portion for accommodating a connection terminal (terminal) connected to the mating connector, and a predetermined length from the end of the connection terminal of the shield wire in which the core wire is conductively connected to the connection terminal. And an electric wire end accommodating tube portion for accommodating the range. In addition, a shield crimping space in which the braided wire tube exposed by peeling off the sheath of the shield wire is usually formed in the middle of the electric wire end accommodating tube.

  In general, as shown in Patent Documents 1 and 2 below, in order to prevent intrusion of water droplets and the like from the opening end of the wire end accommodating tube portion, A substantially cylindrical plug member (seal member) that fills a gap between the shield wire sheath (insulation jacket) and the wire end accommodating tube portion is provided.

  The plug member attached to the opening end side of the electric wire end accommodating tube portion divides the shield crimping space from the opening end side of the electric wire end accommodating tube portion, and externally enters the shield pressing space. Suppresses the ingress of water droplets.

  However, even if the open end side of the wire end accommodating tube portion in the connector housing is sealed by the plug member, if there is an injury or the like in the sheath of the shielded wire extending from the connector housing to the outside, the braid is removed from the injury. Moisture that has penetrated into the wire tube has entered the shield crimping space through the braided wire tube, and there has been a risk of fouling the inside of its own connector or the mating connector.

  Therefore, in order to prevent moisture from penetrating into the shield crimping space through the braided wire tube, an intermediate stop that blocks the transmission of moisture by penetrating hot melt into the braided wire tube outside the connector housing. A technique for water treatment has been proposed (see Patent Document 3 below).

JP 2002-260773 A Japanese Patent Laid-Open No. 7-220813 JP 2009-021146 A

  However, in the intermediate water stop treatment described in Patent Document 3, a step of inserting the hot melt tube into a predetermined position of the shield wire using a dedicated jig, and heating and melting the hot melt tube that has been inserted are performed to braid the wire tube. The number of work steps that are different from the normal assembly process of the connector, such as the step of uniformly infiltrating the connector, increase the productivity of the shield connector and increase the manufacturing cost.

  Therefore, an object of the present invention is to solve the above-mentioned problems, and prevent the self-connector and the mating connector from being damaged due to water immersion in the space for shield crimping without causing a decrease in productivity or an increase in manufacturing cost. An object of the present invention is to provide a shield connector that can be used.

The above-described object of the present invention is achieved by the following configuration.
(1) a shield wire including a core wire made of a covered electric wire, a braided wire tube made of a metal wire covering the core wire, and a sheath made of an insulating resin covering the braided wire tube;
A connection terminal having a core wire connection portion conductively connected to the core wire of the core wire and a connector connection portion conductively connected to the connection terminal of the mating connector;
A terminal accommodating portion that accommodates the connection terminal that is conductively connected to the core wire; and an electric wire end accommodating cylindrical portion that accommodates a predetermined length range from the core wire connecting portion of the shielded wire connected to the connecting terminal. A shield crimping space in which the braided wire tube provided in the middle of the wire end accommodating tube portion and exposed by peeling off the sheath of the shield wire is disposed; and
The shield crimping space is formed by fitting and mounting on the outer periphery of the sheath of the shielded wire on the opening end side of the wire end housing cylinder portion to fill a gap between the sheath and the wire end housing tube portion. A substantially cylindrical plug member that is partitioned from the opening end side of the electric wire end accommodating cylinder, and a shield connector comprising:
The shield wire sheath is formed in a cylindrical shape with a waterproof elastic material, and one end side is closely fitted to the inner periphery of the plug member, and the other end side protrudes into the shield crimping space. A cylindrical seal packing closely fitted on top;
A first seal which is formed in a substantially cylindrical shape by an elastic material having waterproof properties, and has one end side closely fitted to the outer periphery of the plug member and the other end side closely fitted to the outer periphery of the other end of the seal packing. A cap,
A shield connector characterized by further comprising:

(2) It further includes a second seal cap that fits to the end of the plug member in the wire end accommodating cylinder.
The second seal cap is tightly fitted to the end of the plug member from above the first seal cap and covers the outer periphery of the shield crimping space, and the plug member is on the opposite side of the plug member. An inner diameter flange portion extending in an inner diameter direction from an end portion of the cylindrical portion and tightly fitting to an outer periphery of the core wire, and defining the shield crimping space in a closed space. The shield connector according to (1) above.

  According to the configuration of (1) above, the end of the plug member positioned on the shield crimping space side in the wire end accommodating tube is accommodated in the sealing space defined by the seal packing and the first seal cap. ing.

  Therefore, even if there is moisture flowing from the opening end side of the wire end accommodating tube portion to the shield crimping space side along the inner or outer periphery of the plug member, the flowing moisture is isolated in the sealing space. It does not reach the space for shield crimping. Accordingly, it is possible to prevent water from entering the space for shield crimping in the shield connector from the outside.

  In addition, the seal packing, plug member, and first seal cap used to prevent water from entering the shield crimping space are fitted and attached to the end of the shield wire before connecting the connection terminal to the shield wire, for example. This makes it possible to easily attach the shield wire without using a dedicated jig or the like. Therefore, in comparison with the conventional intermediate water stop treatment using hot melt, a troublesome work process such as heating and melting is unnecessary.

  In other words, it is possible to prevent water from entering the space for crimping the shield in the shield connector from the outside without increasing the time-consuming work when assembling the shield connector.

  Therefore, it is possible to prevent the self-connector and the mating connector from being contaminated due to the flooding of the space for crimping the shield without lowering the productivity and increasing the manufacturing cost.

  According to the configuration of (2) above, even if water is generated in the shield crimping space, the shield crimping space is further defined as a closed space by the second seal cap. Moisture is prevented from flowing out to the conductive connection portion between the core wire and the connection terminal or the terminal housing portion side. Accordingly, it is possible to further improve the performance of preventing the self-connector and the mating connector from being contaminated due to water immersion in the shield crimping space.

  According to the shielded connector of the present invention, it is possible to prevent water from entering the space for crimping the shield in the shielded connector from outside without increasing time-consuming work when assembling the shielded connector. Without causing an increase in cost, it is possible to prevent the self-connector and the mating connector from being contaminated due to the flooding of the space for shield crimping.

1 is an exploded perspective view of an embodiment of a shield connector according to the present invention. It is the perspective view which fractured | ruptured a part of assembly state of the shield connector shown in FIG. FIG. 3 is an enlarged view of the vicinity of an opening end of an electric wire end accommodating tube of the connector housing shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a shield connector according to the present invention will be described in detail with reference to the drawings.

  1 to 3 show an embodiment of a shielded connector according to the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is a perspective view with a part broken away, and FIG. 3 is shown in FIG. It is an enlarged view near the opening end of the electric wire edge part accommodation cylinder part of the connector housing.

  The shield connector 1 according to this embodiment includes a shield wire 3, a connection terminal (terminal) 5, a connector housing 7, and a water stop structure 9 attached to the insertion portion of the shield wire 3 in the connector housing 7. ing.

  As shown in FIG. 3, the shield wire 3 includes a core wire 11 that is a covered electric wire in which a core wire 11 a that is a conductor is covered with an insulating coating 11 b, and a braided wire tube 13 made of a metal wire that covers the core wire 11; And a sheath 15 made of an insulating resin covering the braided wire tube 13.

  As shown in FIG. 1, the connection terminal 5 is a press-formed product of a metal plate, and as shown in FIG. 1, a core wire connection portion 17 that is conductively connected to the core wire 11 a of the core wire 11 and a connector connection portion 18 that is conductively connected to the connection terminal of the mating connector. And have. The core wire connecting portion 17 is conductively connected to the core wire 11a by a crimping connection in which the crimping piece 17a is crimped onto the core wire 11a.

  The connector housing 7 is assembled to the housing main body 21, the housing main body 21 into which the shield wire 3 to which the connection terminal 5 is crimped is assembled from one side, the electric wire fixture 23 that fixes the shield wire 3 assembled to the housing main body 21, and the housing main body 21. A cover 25 that covers the shielded wire 3 and the wire fixture 23, an end cover 27 that is fastened to the lower end side of the cover 25 to form a part of a wire end-receiving tube portion described later, and a housing body 21 And a seal ring 29 to be assembled.

  The end cover 27 is fastened to the cover 25 by a pair of bolts 30. The end cover 27 constitutes a part of a later-described electric wire end accommodating tube portion 33 in cooperation with the cover 25. The water stop structure 9 attached to each shield wire 3 is assembled to a part of the electric wire end accommodating cylinder portion 33 formed by the end cover 27 and the cover 25.

  As shown in FIG. 1, the connector housing 7 accommodates two connection terminals 5 in a state where the shield wire 3 is crimped and connected to each connection terminal 5.

  As shown in FIG. 2, the connector housing 7 includes a terminal housing portion 31 that houses the connection terminal 5 that is conductively connected to the core wire 11, and a core wire connection portion 17 of the shield wire 3 that is connected to the connection terminal 5. And an electric wire end accommodating cylinder 33 that accommodates the length range.

  As shown in FIG. 2, the terminal accommodating portion 31 is formed such that a gap 34 remains between the terminal accommodating portion 31 and the core wire connecting portion 17. A filler is injected into the gap 34 for the purpose of fixing the core wire connecting portion 17 and water stopping around the core wire connecting portion 17.

  A shield crimping space 35 is defined in the middle of the wire end accommodating tube 33 by a water stop structure 9 described later.

  The braided wire tube 13 in which the sheath 15 of the shield wire 3 is peeled and exposed is disposed in the shield crimping space 35.

  As shown in FIG. 2 and FIG. 3, the electric wire end accommodating cylinder portion 33 includes a core wire accommodating portion 41 having a small cross-sectional area and a water stop structure accommodating portion 43 having a large cross-sectional area.

  The core wire accommodating portion 41 accommodates the core wire 11 exposed by peeling the sheath 15 and the braided wire tube 13.

  The water stop structure accommodation portion 43 is located on the opening end side of the wire end portion accommodation cylinder portion 33 and accommodates the water stop structure 9 attached to the shield wire 3.

  As shown in FIG. 3, the water stop structure 9 includes a plug member (shield terminal) 51, a seal packing 53, a first seal cap 55, and a second seal cap 57.

  The plug member 51 is fitted and attached to the opening end side of the water stop structure accommodation portion 43 which is a part of the wire end portion accommodation cylinder portion 33. The plug member 51 is formed in a substantially cylindrical shape by a waterproof elastic material. The plug member 51 has a large-diameter cylindrical portion 61 whose outer periphery is fitted to the water-stopping structure accommodating portion 43, and an outer diameter that is set smaller than the large-diameter cylindrical portion 61, and is continuously provided at both ends of the large-diameter cylindrical portion 61. The small-diameter cylindrical portions 63 and 63 are provided.

  An electric wire insertion hole 65 that fits around the outer periphery of the shield wire 3 is formed through the large diameter cylindrical portion 61 and the small diameter cylindrical portion 63.

  A plurality of sealing protrusions 67 that are in close contact with the outer periphery of the shield wire 3 are provided around the inner periphery of the large-diameter cylindrical portion 61. Further, a plurality of sealing protrusions 68 that are in close contact with the inner peripheral surface of the water stop structure housing portion 43 are provided around the outer periphery of the large diameter cylindrical portion 61.

  The plug member 51 described above is fitted and attached to the outer periphery of the sheath 15 of the shield wire 3 so as to fill the gap between the sheath 15 and the water stop structure housing portion 43 and to stop the shield crimping space 35 from water stop. The structure housing section 43 is partitioned (blocked) from the opening end side.

  The seal packing 53 is formed in a simple cylindrical shape by an elastic material having waterproofness. The inner diameter of the seal packing 53 is set so as to be tightly fitted to the outer periphery of the sheath 15 of the shield wire 3. Further, the outer diameter of the seal packing 53 is set so as to be closely fitted to the inner periphery of the small-diameter cylindrical portion 63 that is the end portion of the plug member 51 in the water-stopping structure housing portion 43.

  The seal packing 53 described above is tightly fitted onto the sheath 15 of the shielded wire 3 so that one end thereof is closely fitted to the inner periphery of the plug member 51 and the other end is projected into the shield crimping space 35. Can be combined.

  The first seal cap 55 is formed in a substantially cylindrical shape by an elastic material having waterproof properties. As shown in FIG. 3, the first seal cap 55 is formed with a large-diameter plug fitting cylinder portion 71 that is tightly fitted to the outer periphery of the plug member 51 on one end side. In addition, the other end side of the first seal cap 55 is formed with a stacking fitting cylinder portion 73 that fits in a stacked state on the outer periphery of the other end portion of the seal packing 53.

  One end side of the first seal cap 55 is closely fitted to the outer periphery of the plug member 51, and the other end side is closely fitted to the outer periphery of the other end portion of the seal packing 53. The inner and outer periphery of the end portion of the plug member 51 is sealed.

  The second seal cap 57 is integrated with the plug member 51 by being fitted to the end portion (the small-diameter cylindrical portion 63) of the plug member 51 in the electric wire end accommodating tube portion 33.

  As shown in FIG. 3, the second seal cap 57 includes a cylindrical portion 81 that is tightly fitted from above the first seal cap 55 to the small-diameter cylindrical portion 63 that is an end portion of the plug member 51, and the plug member 51. An inner diameter flange 83 extending in the inner diameter direction from the end of the cylindrical portion 81 on the opposite side and fitting tightly to the outer periphery of the core wire 11 is provided. A sealing protrusion 84 is provided around the inner peripheral portion of the inner diameter flange portion 83 to improve the sealing performance with the core wire 11.

  The cylindrical portion 81 of the second seal cap 57 also functions as a partition wall that covers the outer periphery of the shield crimping space 35.

  In other words, the second seal cap 57 is integrated with the plug member 51, thereby defining a shield crimping space 35 that is a closed space between the second seal cap 57 and the plug member 51.

  In the shield connector 1 described above, the small-diameter cylindrical portion 63 that is the end portion of the plug member 51 located on the shield crimping space 35 side in the wire end portion accommodating cylindrical portion 33 includes the seal packing 53 and the first seal cap. 55 is accommodated in a sealed space 91 (see FIG. 3) defined by 55.

  Therefore, as shown by arrow A in FIG. 3, even if there is moisture flowing into the shield crimping space 35 side from the opening end side of the electric wire end accommodating cylindrical portion 33 along the inner periphery or outer periphery of the plug member 51, The inflowed moisture is isolated in the sealed space 91 and does not reach the shield crimping space 35. Accordingly, it is possible to prevent water from entering the space 35 for crimping the shield in the shield connector 1 from the outside.

  In addition, the seal packing 53, the plug member 51, and the first seal cap 55 used for preventing water from entering the shield crimping space 35 are, for example, the end of the shield wire 3 before the connection terminal 5 is connected to the shield wire 3. By fitting and attaching to the part, the shielded wire 3 can be easily attached without using a dedicated jig or the like. Therefore, in comparison with the conventional intermediate water stop treatment using hot melt, a troublesome work process such as heating and melting is unnecessary.

  In other words, it is possible to prevent water from entering the shield crimping space 35 in the shield connector 1 from the outside without increasing time-consuming work during assembly of the shield connector 1.

  Therefore, it is possible to prevent the self-connector and the mating connector from being contaminated due to the flooding of the shield crimping space 35 without causing a decrease in productivity or an increase in manufacturing cost.

  In the shield connector 1 of the above embodiment, even if the shield crimping space 35 is submerged, the shield crimping space 35 is further defined in the closed space by the second seal cap 57. Moisture in the working space 35 is prevented from flowing out to the conductive connection portion between the core wire 11 and the connection terminal 5 or the terminal accommodating portion 31 side. Accordingly, it is possible to further improve the performance of preventing the self-connector and the mating connector from being contaminated due to water immersion in the shield crimping space 35.

  Moreover, in the shield connector 1 of the said embodiment, the internal diameter collar part 83 of the 2nd seal cap 57 interrupts | blocks between the core wire accommodating part 41 side of the electric wire edge part accommodating cylinder part 33, and the water stop structure accommodating part 43 side. Functions as a waterproof wall.

  Therefore, as indicated by an arrow B in FIG. 3, even if there is moisture entering from the core wire housing portion 41 side, the moisture can be prevented from entering the shield crimping space 35.

  The present invention is not limited to the above-described embodiments, and can be appropriately modified and improved. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

DESCRIPTION OF SYMBOLS 1 Shield connector 3 Shield wire 5 Connection terminal 7 Connector housing 9 Water stop structure 11 Core wire 13 Braided wire tube 15 Sheath 21 Housing body 25 Cover 31 Terminal accommodating part 33 Wire end accommodating cylinder part 35 Shield crimping space 41 Core line accommodating Part 43 Water blocking structure housing part 51 Plug member (shield terminal)
53 Seal Packing 55 First Seal Cap 57 Second Seal Cap 81 Tubular Part 83 Inner Diameter Gutter 84 Sealing Projection 91 Sealing Space

Claims (2)

A shield wire comprising a core wire made of a covered electric wire, a braided wire tube made of a metal wire covering the core wire, and a sheath made of an insulating resin covering the braided wire tube;
A connection terminal having a core wire connection portion conductively connected to the core wire of the core wire and a connector connection portion conductively connected to the connection terminal of the mating connector;
A terminal accommodating portion that accommodates the connection terminal that is conductively connected to the core wire; and an electric wire end accommodating cylindrical portion that accommodates a predetermined length range from the core wire connecting portion of the shielded wire connected to the connecting terminal. A shield crimping space in which the braided wire tube provided in the middle of the wire end accommodating tube portion and exposed by peeling off the sheath of the shield wire is disposed; and
The shield crimping space is formed by fitting and mounting on the outer periphery of the sheath of the shielded wire on the opening end side of the wire end housing cylinder portion to fill a gap between the sheath and the wire end housing tube portion. A substantially cylindrical plug member that is partitioned from the opening end side of the electric wire end accommodating cylinder, and a shield connector comprising:
The shield wire sheath is formed in a cylindrical shape with a waterproof elastic material, and one end side is closely fitted to the inner periphery of the plug member, and the other end side protrudes into the shield crimping space. A cylindrical seal packing closely fitted on top;
A first seal which is formed in a substantially cylindrical shape by an elastic material having waterproof properties, and has one end side closely fitted to the outer periphery of the plug member and the other end side closely fitted to the outer periphery of the other end of the seal packing. A cap,
A shielded connector further comprising: A second seal cap that fits into an end portion of the plug member in the wire end accommodating tube portion;
The second seal cap is tightly fitted to the end of the plug member from above the first seal cap and covers the outer periphery of the shield crimping space, and the plug member is on the opposite side of the plug member. An inner diameter flange portion extending in an inner diameter direction from an end portion of the cylindrical portion and tightly fitting to an outer periphery of the core wire, and defining the shield crimping space in a closed space. The shield connector according to claim 1.

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