JP4009050B2 - Shield connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shield connector.
[0002]
[Prior art]
FIGS. 10 and 11 show an example of a conventional shield connector that is disclosed in Japanese Patent Laid-Open No. 11-26093. This shield connector includes a rubber ring 2, a holding ring 3, a conductive sleeve 4, and a holding ring 5 in a cylindrical resin housing 1, and these are inserted through a shielded electric wire 10 and attached. A conductive contact piece 6 is disposed on the outer peripheral surface of the front end of the resin housing 1, and is electrically connected to the shield layer 13 of the shielded electric wire 10 via the conductive sleeve 4. Then, when the flange 7 projecting from the resin housing 1 is pressed against the opening edge of the mounting hole formed in the shield wall of the electric device (not shown) and bolted, the conductive contact piece 6 is electrically connected to the inner peripheral surface of the mounting hole. Thus, the shield wall and the shield layer are conductively connected.
[0003]
[Problems to be solved by the invention]
However, in the configuration of the conventional shield connector, there are only six basic component parts (parts denoted by reference numerals 1 to 6), and when other fine parts are combined, the number of parts is as shown in FIG. It becomes very much. For this reason, there existed a problem that assembly | attachment man-hours took and the cost became high.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a shielded connector having a small number of parts.
[0004]
[Means for Solving the Problem, Action of the Invention / Effect of the Invention]
<Invention of Claim 1>
The shield connector according to the first aspect of the present invention covers the shield layer exposed at the end portion of the shielded electric wire and is fixed to the shielded electric wire, and is attached to the counterpart shield wall to conduct the shield layer and the counterpart shield wall. In the shield connector to be connected, a conductive flange having conductivity and abutting against the other shield wall, and formed on the conductive flange to accommodate the exposed portion of the shield layer from the side of the shielded electric wire and the shield layer a U-shaped groove which is conductively connected to the shield wire with conductive flange by placement into the mold for resin molding, and a housing that is molded by filling the resin into the mold, said shield layer And an inner sleeve that sandwiches the shield layer between the inner surface of the U-shaped groove and the inner sleeve is provided .
To attach the shield connector of claim 1 to the shielded electric wire, the flange is pressed from the side of the shielded electric wire, the shield layer of the shielded electric wire is brought into close contact with the inner surface of the U-shaped groove formed in the flange, and the shield layer and the flange are electrically connected. Connecting. And these are inserted in a metal mold | die and a housing is shape | molded. Here, in the present invention, since the flange fixed to the mating shield wall is made conductive and the shield layer is conductively connected to the conductive flange, the structure for conducting the shield layer and the mating shield wall is simplified, and the number of parts is reduced. Is reduced. And since a conductive flange is attached from the side of a shielded electric wire, attachment work is easier than what attaches a conductive flange along the axial direction of a shielded electric wire.
Further, an inner sleeve is fitted inside the shield layer, the shield layer is sandwiched between the inner sleeve and the inner surface of the U-shaped groove portion, and the shield layer is reliably conductively connected to the conductive flange.
[0006]
<Invention of Claim 2 >
According to a second aspect of the present invention, in the first aspect of the present invention, the U-shaped curved portion that extends along the shielded electric wire, has a crimping portion to the shield layer at one end, and is in close contact with the inner surface of the U-shaped groove portion at the other end. It is characterized in that an auxiliary barrel provided is provided.
In the configuration of claim 2 , the crimping portion provided at one end of the auxiliary barrel is crimped to the shield layer of the shielded electric wire, and the U-shaped curved portion provided at the other end is pushed into the U-shaped groove portion formed in the conductive flange, thereby A flange is conductively connected to the shield layer via the auxiliary barrel.
[0007]
<Invention of Claim 3 >
According to a third aspect of the present invention, in the first or second aspect of the present invention, a synthetic resin softer than the housing is molded on the outer peripheral surface of the shielded electric wire inside the rear end portion of the housing before the housing is molded. It is characterized in that a waterproof cylindrical body is provided.
According to this configuration, the waterproof cylinder that is softer than the housing is brought into close contact with the housing and the shielded electric wire, and the rear end portion of the housing is waterproofed.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
<First Embodiment>
Next, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the shielded electric wire 10 includes a core wire 11, an inner insulating layer 12, a shield layer 13, and an outer coating 14 from the axial center side. The internal insulating layer 12 and the shield layer 13 are sequentially exposed from the tip side.
[0009]
The shield connector of the present embodiment has a sectional shape shown in FIG. 2, and is integrally attached to the terminal portion of the shielded electric wire 10. As shown in the figure, the shield connector includes a housing 21 made of a synthetic resin (for example, polyamide) that covers the shield layer 13 exposed at the terminal portion of the shielded electric wire 10.
[0010]
A metal conductive flange 22 (hereinafter simply referred to as “flange 22”) projects from the front side toward the side of the housing 21. The flange 22 is formed by punching a metal plate and has, for example, a pear shape as a whole as shown in FIG. A bolt insertion hole 23 is formed near the upper end, and a U-shaped groove portion 24 is formed near the lower end. The U-shaped groove portion 24 opens to the lower end of the flange 22, and has a curvature that allows the curved surface 24 </ b> A at the back to be in close contact with the outer surface of the shield layer 13.
[0011]
An inner sleeve 27 is fitted inside the exposed portion of the shield layer 13. As shown in FIG. 1, the inner sleeve 27 is formed with a vertically divided slit 27 </ b> A in a part in the circumferential direction of the metal tube, and can be elastically deformed in the radial direction.
[0012]
The front side of the housing 21 from the flange 22 (see FIG. 2) forms an insertion portion 28 for the mounting hole W1 formed in the mating shield wall W, and an O-ring 29 is fitted in a groove 28A formed in the outer peripheral surface thereof. Has been.
[0013]
Further, a waterproof cylinder portion 30 made of a synthetic resin (for example, urethane) softer than the housing 21 is provided on the inner peripheral side of the rear end portion of the housing 21. A plurality of recesses 30 </ b> A and protrusions 30 </ b> B are alternately and repeatedly formed on the outer peripheral surface of the waterproof cylinder portion 30 along the axial direction.
[0014]
Next, the process of attaching the shield connector of this embodiment to the shielded electric wire 10 will be described.
First, the inner sleeve 27 is inserted between the shield layer 13 and the inner insulating layer 12 in the shielded electric wire 10. Then, the open end of the U-shaped groove portion 24 of the flange 22 is directed to the exposed portion of the shield layer 13 of the shielded electric wire 10 from the side, and the flange 22 is pressed against the shielded electric wire 10. Then, as shown in FIG. 4, the shield layer 13 is brought into close contact with the curved surface 24 </ b> A at the back of the U-shaped groove 24 and is conductively connected. Here, when the shielded electric wire 10 is pushed into the U-shaped groove portion 24, the inner sleeve 27 disposed on the inner side of the shield layer 13 is deformed to reduce its diameter, and with its elastic force, the shield layer 13 is deformed into the U-shaped groove portion 24. The shield layer 13 is reliably connected to the flange 22 by being pressed firmly against the inner surface of the flange 22.
[0015]
The shielded electric wire 10 to which the conductive flange 22 is attached is set in a soft resin molding die. And the resin (for example, urethane) of a molten state is filled in the metal mold | die, and the waterproof cylinder part 30 is shape | molded. Next, this is taken out from the mold, and the shielded electric wire 10 is set in a molding mold for resin having high rigidity. At this time, as shown in FIG. 3A, the pins P1 and P1 provided on the mold are inserted into the recessed portion 30A on the rear end side formed on the outer peripheral surface of the waterproof cylindrical portion 30, and the flange 22 is connected to the metal mold. The position of the waterproof cylinder 30 and the flange 22 is fixed by being sandwiched by the mold opening surface PL of the mold. And the resin (for example, polyamide) of a molten state is filled in the metal mold | die. Here, even if the resin is filled from the rear side of the flange 22 in the resin molding space of the mold (for example, the left side in FIG. 3A), the molten resin opens the U-shaped groove portion 24 formed in the flange 22. The insertion part 28 (see FIG. 3B) of the shield connector is formed through the end side and also to the front side of the flange 22. And this is taken out from a metal mold | die, O-ring 29 is fitted to the outer surface of the above-mentioned insertion part 28, and the assembly operation | work of a shield connector and the attachment operation | work to an electric wire are completed with this.
[0016]
As shown in FIG. 2, the shield connector is inserted into the mounting hole W1 formed in the shield wall W of the electrical equipment, and the flange 22 is abutted against the opening edge of the mounting hole W1, It is fixed to the shield wall W with bolts (not shown). Then, the flange 22 is pressed against the shield wall W to be conductively connected, and thus the shield layer 13 is conductively connected to the shield wall W. In addition, the O-ring 29 is crushed between the outer peripheral surface of the insertion portion 28 and the inner peripheral surface of the mounting hole W1 to achieve waterproofing. Further, at the rear end portion of the shield connector, the waterproof cylindrical portion 30 made of a synthetic resin softer than the housing 21 is in close contact with the inner peripheral surface of the housing 21 and the outer peripheral surface of the shielded electric wire 10, and the rear end portion of the shield connector. Intrusion into the connector is prevented.
[0017]
As described above, according to the shield connector of the present embodiment, the flange 22 fixed to the mating shield wall W is made conductive, and the shield layer 13 is directly conductively connected to the flange 22. The structure for conducting W is simplified, and the number of parts is reduced. In addition, since the flange 22 is attached from the side of the shielded electric wire 10, the attachment work is easier than the case where the flange 22 is attached along the axial direction of the shielded electric wire 10. As a result, the number of assembling steps can be simplified and the cost can be reduced. In the shield connector of the present embodiment, the pressing surfaces of the flange 22 and the mating shield wall W are conductive connection surfaces of the shield connector and the mating shield wall W, so that a wide conducting area is ensured compared to the conventional one. In addition, since both are brought into close contact with each other by tightening bolts, the stability of conduction between the shield connector and the counterpart shield wall W is increased as compared with the conventional one.
[0018]
< Reference example >
This reference example is shown in FIGS. 5 and 6 and includes an auxiliary barrel 50 instead of the inner sleeve 27 of the first embodiment. Since the other configuration is the same as that of the first embodiment, the same configuration is denoted by the same reference numeral, the duplicate description is omitted, and only different configurations will be described below.
[0019]
The auxiliary barrel 50 of the present reference example is formed by punching a metal plate and bending it into a U shape, and has a barrel shape extending along the shielded electric wire 10 as a whole. And the one end side of the auxiliary | assistant barrel 50 comprises the crimping | compression-bonding part 51 to the shield electric wire 10, and a pair of crimping pieces 51A and 51A extended from the U-shaped opposing wall are provided there. Further, the other end side of the auxiliary barrel 50 forms a U-shaped curved portion 52 that is conductively connected to the inner surface of the U-shaped groove portion 24 of the flange 22, which is also extended from a U-shaped opposing wall and is crimped. A pair of contact pieces 52A, 52A longer than the piece 51A is provided.
[0020]
In order to attach the shield connector of this reference example to the shielded electric wire 10, first, the auxiliary barrel 50 is addressed to the shield layer 13 from the side, and the shield layer 13 is adhered to the inner surface of the curved portion of the auxiliary barrel 50. Then, the crimping pieces 51A and 51A are tilted toward the shield layer 13 and crimped. Next, the U-shaped curved portion 52 of the auxiliary barrel 50 is pushed into the U-shaped groove portion 24 formed in the flange 22 from the curved side. Then, the outer surface of the U-shaped curved portion 52 is in close contact with substantially the entire inner surface of the auxiliary barrel 50. As a result, the flange 22 is conductively connected to the shield layer 13 via the auxiliary barrel 50. Then, in the same manner as in the first embodiment, the waterproof cylindrical portion 30 and the housing 21 are molded, and the shield connector of this reference example is completed. Even with such a configuration, the same effects as those of the first embodiment described above can be obtained.
[0021]
Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same components as those in the first embodiment and the reference example are denoted by the same reference numerals and description thereof is omitted.
In the present embodiment, a conductive flange 71 having three U-shaped groove portions 72 at the side edge portion, an auxiliary barrel 50 of a reference example , and an inner sleeve 70 are provided. In the present embodiment, the use of the three shielded wires 10 attached to the flange 71 is effective for use when a three-phase AC motor is used.
[0022]
The flange 71 is formed by punching a metal plate and has a substantially pentagonal shape as a whole. A bolt insertion hole 73 is formed near the upper end of the flange 71, and U-shaped groove portions 72 are respectively provided in the left and right sides and the lower side. Each U-shaped groove portion 72 is open to the outside of the flange 71, and has a curvature that allows the curved surface 72 </ b> A at the back to be in close contact with the U-shaped curved portion 52 of the auxiliary barrel 50.
Further, the inner sleeve 70 is formed in a cylindrical shape by a metal material, and is inserted between the inner insulating layer 12 and the shield layer 13 of the shielded electric wire 10. It crimps by the crimping | compression-bonding pieces 51A and 51A.
[0023]
To attach the shield connector of the present embodiment to the shielded electric wire 10, first, the inner sleeve 70 is inserted between the inner insulating layer 12 and the shield layer 13, and the auxiliary barrel 50 is addressed to the shield layer 13 from the side. Thus, the shield layer 13 is brought into close contact with the inner surface of the curved portion. Then, the shield layer 13 is caulked by the crimping pieces 51A and 51A (note that although not shown in the drawing, the same operation is performed on the three shielded wires 10).
[0024]
Next, the U-shaped curved portion 52 of the auxiliary barrel 50 is press-fitted into the U-shaped groove portion 72 formed in the flange 71 from the curved side. Then, the outer surface of the U-shaped curved portion 52 is in close contact with substantially the entire inner surface of the auxiliary barrel 50. Thus, the flange 22 is conductively connected to the shield layer 13 via the auxiliary barrel 50. Thereafter, the shield connector of the present embodiment is completed in the same manner as in the first embodiment. Even with such a configuration, the same effects as those of the first embodiment described above can be obtained. In the present embodiment, the auxiliary barrel 50 is crimped in a state where the inner sleeve 70 is attached to the inside of the shield layer 13. Become.
[0025]
In the present embodiment, the shape of the flange may be wide like the flange 80 of the modified example shown in FIG. 9, and three U-shaped groove portions 81 may be provided on the bottom side. A bolt insertion hole 82 is opened at the center upper end of the flange 80. In FIG. 9, the same components as those described above are denoted by the same reference numerals, and description thereof is omitted.
[0026]
<Other embodiments>
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.
[0027]
(1) In the reference example , a sleeve may be fitted inside the shield layer 13 and the auxiliary barrel 50 may be caulked outside the shield layer 13.
[0028]
Without providing a (2) before Symbol auxiliary barrel 50, a shield layer 13 in the U-shaped groove 24 formed in the flange 22 pushing from the side, may be fixed with the structures in for example, a conductive adhesive.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a shielded electric wire and a flange according to a first embodiment of the present invention. FIG. 2 is a side sectional view of the shield connector of the same embodiment. Side cross-sectional view in a state of being set inside (B) Side cross-sectional view showing a completed state of a shield connector [FIG. 4] Vertical cross-sectional view showing a connection state between a U-shaped groove and a shield layer [FIG. 5] Flange according to a reference example FIG. 6 is a perspective view showing a state in which the auxiliary barrel is caulked to the shielded electric wire. FIG. 7 is an exploded perspective view of the second embodiment. FIG. 8 is a connection between the U-shaped groove and the shield layer. FIG. 9 is an exploded perspective view of a modification of the second embodiment. FIG. 10 is a side sectional view of a conventional shield connector. FIG. 11 is an exploded perspective view of a conventional shield connector.
DESCRIPTION OF SYMBOLS 10 ... Shield electric wire 13 ... Shield layer 21 ... Housing 22 ... Conductive flange 24 ... U-shaped groove part 27 ... Inner sleeve 30 ... Waterproofing cylinder part 50 ... Auxiliary barrel 51 ... Crimp part 52 ... U-shaped curved part W ... Counterpart shield wall

Claims (3)

In the shield connector that covers the shield layer exposed at the terminal portion of the shielded electric wire and is fixed to the shielded electric wire, and is attached to the counterpart shield wall and electrically connects the shield layer and the counterpart shield wall.
A conductive flange having conductivity and abutting against the opposing shield wall;
A U-shaped groove formed on the conductive flange, containing an exposed portion of the shield layer from the side of the shielded electric wire, and electrically connected to the shield layer;
A housing formed by placing the shielded wire together with the conductive flange in a mold for resin molding and filling the mold with resin ;
A shield connector comprising an inner sleeve fitted inside the shield layer and sandwiching the shield layer with an inner surface of the U-shaped groove . 2. The auxiliary barrel according to claim 1, wherein the auxiliary barrel includes a U-shaped curved portion that extends along the shielded electric wire, has a crimping portion to the shield layer at one end, and is in close contact with the inner surface of the U-shaped groove portion at the other end. Shield connector characterized by providing A waterproof cylinder formed by molding a synthetic resin softer than the housing on the outer peripheral surface of the shielded wire before the housing is molded is provided inside the rear end of the housing. Item 3. The shield connector according to item 1 or 2.

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