JP4076201B2 - Shield connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shield connector provided at a terminal portion of a shielded electric wire and attached to a through hole formed in a shield wall on the other side.
[0002]
[Prior art]
3 and 4 show an example of a conventional shield connector that is disclosed in Japanese Patent Application 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 above), 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.
[0004]
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.
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, a shield connector according to the invention of claim 1 is configured such that a housing covering a terminal portion of a shielded electric wire is attached to a through hole formed in a shield wall on the other side, and a shield layer of the shielded electric wire is provided. Is connected to the shield wall on the other side, and the shield wire is held in a state where the core wire of the shielded wire or the terminal fitting connected to the core wire is inserted into the shield wall on the other side. The shielded electric wire is inserted into a resin molding die in an exposed state, and is formed of a conductive synthetic resin filled therein, and a metal ring is pressure-bonded to the exposed shield layer of the shielded electric wire. In addition, a plurality of projecting pieces are extended from the metal ring to the side, and the housing is formed by filling the metal ring and the projecting piece with synthetic resin. A metal ring or protrusion is characterized where the hole enters the conductive synthetic resin of the housing is formed through.
[0008]
[Action and effect of the invention]
<Invention of Claim 1>
According to the configuration of the first aspect, since the housing is an insert-molded product related to the shielded electric wire, the number of parts can be greatly reduced. In addition, since the housing is made of conductive synthetic resin and is in close contact with the shield layer, the entire housing also serves as a shield member that covers the terminal portion of the shielded electric wire, thereby further reducing the number of parts. .
[0009]
In addition , the metal ring is pressure-bonded to the shield layer and stably connected to the metal ring, and by extending a plurality of projecting pieces from the metal ring, the metal ring is stably brought into contact with the conductive housing over a wide area. Are connected. As a result, the conductive housing and the shield layer of the shielded electric wire are stably conductively connected via the metal ring.
[0010]
Further , by forming a hole in the metal ring or the projecting piece, the contact area with the conductivity constituting the housing is further increased, and the conduction stability is further improved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1A, 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. And in the terminal part of the shield electric wire 10, the core wire 11, the internal insulating layer 12, and the shield layer 13 are exposed in steps from the front end side.
[0012]
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. In the figure, reference numeral 20 denotes a metal ring which is inserted through the shielded electric wire 10. The state of the metal ring 20 before being attached to the shielded electric wire 10 is shown in FIG. 1 (A), and a plurality of projecting pieces 22 are extended from the cylindrical ring body 21 toward the side. Become. More specifically, a pair of slits are formed in parallel along the axial direction of the ring body 21 at positions where the circumferential direction of one end of the ring body 21 is equally arranged, and the projecting piece 22 is formed between the slits. These protrusions 22 are bent at a right angle toward the side of the ring main body 21. Further, a round hole 23 is formed through the front end side of each protruding piece 22. Then, the metal ring 20 is inserted into the shielded electric wire 10 and fitted so as to cover the outer side of the shield layer 13, and as shown in FIG. 13 is crimped.
[0013]
Further, as shown in FIG. 2, a general round terminal 30 is crimped to the tip of the core wire 11 of the shielded electric wire 10, and the tip of the outer sheath 14 is covered with a waterproof cylinder portion 31. The waterproof cylindrical portion 31 is formed in a cylindrical shape so that the shielded electric wire 10 is inserted into a mold for soft synthetic resin (for example, urethane) and the outer surface of the outer coating 14 is covered with the resin filled in the mold. ing. Further, an uneven portion 32 is formed at a position near the tip of the peripheral surface of the waterproof cylindrical portion 31, and a close contact portion with the housing 40 has a labyrinth structure to improve waterproofness.
[0014]
Now, in the shield connector of this embodiment, the housing 40 is comprised with the electroconductive synthetic resin. More specifically, the housing 40 has the shield layer 13 exposed and the metal ring 20 is crimped thereto, and the shield wire 10 is inserted into a mold for resin molding and filled in the mold. It is molded from a conductive synthetic resin (for example, polybutylene terephthalate (PBT) compounded with solder or Sn). Here, the metal ring 20 is pressure-bonded to the shield layer 13 to be stably conductively connected, and a plurality of projecting pieces 22 are extended from the metal ring 20 so that the metal ring 20 has a large area with the conductive housing 40. Contact and stable conduction connection. As a result, the conductive housing 40 and the shield layer 13 of the shielded electric wire 10 are stably connected to each other via the metal ring 20.
[0015]
Further, a flange 41 is integrally formed near the tip of the housing 40, and a bolt hole 42 is penetrated through a part of the flange 41. Furthermore, an O-ring groove 44 is formed on the outer peripheral surface of the fitting portion 43 on the distal end side of the flange 41 in the housing 40, and an O-ring 45 is accommodated therein.
[0016]
The shield connector of the present embodiment configured as described above is attached to a shield wall having conductivity (hereinafter referred to as “mating shield wall 50”). As shown in FIG. 2, a through hole 51 is formed in the opposing shield wall 50, and a screw hole 52 is formed in the vicinity of the through hole 51. And a shield connector fits the fitting part 43 in the through-hole 51, presses the flange 41 against the opening edge, and screwes the bolt B passed through the bolt insertion hole 32 into the screw hole 52. It is fixed to the shield wall 50. Then, the core wire 11 of the shielded electric wire 10 enters the counterpart shield wall 50 through the through hole 51 of the counterpart shield wall 50, and the flange 41 is mainly brought into close contact with the flange 41 and the counterpart shield wall 50. And the other shield wall 50 are conductively connected. Further, on the round terminal 30 side of the shield connector, the O-ring 45 is crushed between the fitting portion 43 and the through hole 51, while the waterproof cylindrical portion 31 is external to the shielded electric wire 10 at the rear end portion of the shield connector. The cover 14 and the housing 40 are in close contact with each other, and the shield connector is waterproofed.
[0017]
Thus, according to the shield connector of the present embodiment, since the housing 40 is an insert molded product related to the shielded electric wire 10, the number of parts can be greatly reduced. Moreover, since the housing 40 is made of a conductive synthetic resin and is in close contact with the shield layer 13, the entire housing 40 also serves as a shield member that covers the terminal portion of the shielded electric wire 10, thereby further increasing the number of parts. Reduction is planned.
[0018]
<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.
[0019]
(1) In the above embodiment, the shield wire has a structure that extends long in front of the core wire housing. However, the tip of the core wire is accommodated in the housing, and, for example, a terminal fitting is crimped to the tip of the core wire. It is good also as a structure which protruded the front-end | tip part of the terminal metal fitting from the housing.
[0021]
( 2 ) Moreover, in the said embodiment, although the metal ring 20 was previously formed in the cylinder shape and it was the structure fitted to a shield electric wire, a metal ring is a U-shaped metal plate initially, for example. It is also possible to adopt a configuration in which a ring-shaped structure is formed by crimping from the side of the shielded electric wire.
[Brief description of the drawings]
FIG. 1 is a perspective view of a metal ring according to an embodiment of the present invention. FIG. 2 is a side sectional view of a shield connector. FIG. 3 is a side sectional view of a conventional shield connector. [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Shield electric wire 11 ... Core wire 13 ... Shield layer 20 ... Metal ring 22 ... Projection piece 23 ... Round hole (terminal metal fitting)
30 ... Round terminal 50 ... Mating shield wall 51 ... Through hole

Claims (1)

A housing covering the terminal portion of the shielded wire is attached to a through hole formed in the shield wall on the other side, the shield layer of the shielded wire is conductively connected to the shield wall on the other side, and In the shield connector that holds the core wire or the terminal fitting connected to the core wire in a state of being plunged into the shield wall on the other side,
The housing is formed of a conductive synthetic resin that is inserted into a resin molding die with the shielded electric wire in a state where the shield layer is exposed ,
A metal ring is pressure-bonded to the exposed shield layer of the shielded electric wire, and a plurality of projecting pieces extend laterally from the metal ring, around the metal ring and the projecting pieces. The housing is molded by filling the synthetic resin,
A shielded connector, wherein the metal ring or the projecting piece is formed with a hole penetrating a conductive synthetic resin constituting the housing .

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