Electrical connectors – With supporting means for coupling part – Coupling part or mating part extending into panel opening
Reexamination Certificate
2000-08-23
2004-03-09
Gilman, Alexander (Department: 2833)
Electrical connectors
With supporting means for coupling part
Coupling part or mating part extending into panel opening
C439S564000
Reexamination Certificate
active
06702611
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a shielded connector for mounting on a shielded wall of electrical equipment or to a terminal to be mounted to a shielded cable.
2. Description of the Related Art
FIGS. 9 and 10
illustrate an example of a shielded connector to be mounted to a terminal of a shielded cable, which was disclosed in Japanese Patent Laid-Open No. 7-245153. The connector housing
109
included in the shielded connecter
100
has a double structure comprising an inner housing
101
and an outer housing
102
formed in the shape of a cylinder of a synthetic resin being superimposed one on another, a connecting wall
103
partly connecting between peripheral surfaces of the inner housing
101
and the outer housing
102
, a terminal fitting
104
received in the inner housing
101
, and a shielding shell
105
formed in the cylindrical shape of a metal sheet inserted between the inner housing
101
and the outer housing
102
. The shielding shell
105
serves to enclose and to shield the periphery of the terminal fitting
104
, and a part of the outer housing
102
constitutes a cylindrical hood portion
107
opening toward the other corresponding part, to which the other corresponding connector
120
is fitted and locked by a locking arm
108
provided on the hood portion
107
. The terminal fitting
104
is provided with a shielded cable D
1
crimped thereon, and the shielding layer and the shielding shell
105
are conductively connected with respect to each other.
FIGS. 11 and 12
illustrate an example of a shielded connector to be mounted on the shielded wall of electrical equipment, which is presented in Japanese Patent Laid-Open No. 8-78098. The shielded connector
110
also comprises an inner housing
111
and the outer housing
112
constructed of a synthetic resin partly connected via a connecting wall (not shown), and a metallic shielding shell
115
inserted therebetween to enclose the terminal fitting
114
received in the inner housing
111
, wherein a part of the outer housing
112
constitutes a hood portion
116
, and the other corresponding connector (not shown) is engaged with the locking hole
120
formed on the hood portion
116
. The connector
110
is provided at the rear end of the outer housing
112
with a flange
117
, which is screwed to the shielded wall
119
with the packing mounted on the flange
117
crushed by the shielded wall
119
. The part of the flange
117
within the packing
118
is provided with a plurality of presser strips
115
B extending sideward from the rear end portion of the shielding shell
115
, the presser strips
115
B being pressed against the shielded wall
119
to conductively connect the shielding shell
115
and the shielded wall
119
.
The conventional shielded connectors
100
and
110
have a problem in that noises tend to leak through a slit (See
115
A,
FIG. 11
) formed on the shielded shell corresponding to the connecting wall for connecting the inner housing and the outer housing, thus resulting in degradation of shielding property.
Since the shielded connector to be mounted on the shielded wall
119
of electrical equipment includes presser strips
115
B on the flange
117
, the flange
117
has to be significantly large in size correspondingly, thereby requiring a large mounting space on the shielded wall
119
.
Since the flange
117
constitutes a part of the connector housing constructed of a synthetic resin, there is apprehension that the flange is deformed by heat and thus the screw that fix the flange
117
to the shielded wall
119
is loosened, thereby degrading the connection and waterproof property between the presser strips
115
B and the shielded wall
119
.
SUMMARY OF THE INVENTION
Accordingly, with the circumstanced described above in view, it is an object of the invention to provide a shielded connector that has superior shielding property, requires only a small mounting space when being mounted to electrical equipment, and has good resistance to water at the mounting portion.
The shielded connector according to a first aspect of the invention comprises a connector housing for accommodating a terminal fitting, a cylindrical hood portion provided on the connector housing for being fitted to the other corresponding connector, and locking means provided on the hood portion for preventing both of connectors from being detached, wherein the hood portion is constructed by mounting a cylindrically formed conductive member to the connector housing, and a shielding shell is constructed by enclosing the terminal fitting by the conductive member.
In this arrangement, since the cylindrical hood portion is constructed of a conductive material and thus the hood portion itself serves as a shielding shell, the terminal fitting may be enclosed without any clearance by the peripheral wall closed along the entire side surface of the conductive material, so that leaking of noises through the slit formed on the shielding shell may be avoided, thereby improving the shielding property.
A second aspect of the invention is the shielded connector as set forth in connection with the first aspect of the invention characterized in that the shielded wall provided on electrical equipment is formed with a mounting hole for mounting the connector therethrough, and the flange extending sideward from the conductive member is screwed against the shielded wall so that the conductive member and the shielded wall are conductively connected.
In this arrangement, since the flange extending from the conductive member constituting the shielding shell is fixed and conductively connected to the shielded wall, the space used for mounting on electrical equipment may be reduced in comparison with the conventional arrangement wherein the portion conductively connected to the shielded wall and the flange to be used for the purpose of fixing are provided independently.
A third aspect of the invention is the shielded connector as set forth in the first and second aspects of the invention, characterized in that the conductive member is constructed of metal.
In this arrangement, since the conductive member is constructed of metal, the strength and heat resistant property is improved, thereby preventing the deformation of the hood portion engaged with the other corresponding connector and the flange screwed onto the shielded wall. By providing a packing between the flange and the shielded wall, the packing is pressed against the shielded wall stably, thereby improving the waterproof property.
A fourth aspect of the invention is a shielded connector as set forth in any of the first to the third aspects, wherein a contact the middle portion of which is divided into a plurality of bands projecting sideward is fitted on the peripheral surface of the conductive member, and is resiliently in contact with the other corresponding shielding shell provided on the other corresponding connector.
In this arrangement, resilient force of the contact crashed between the conductive material as a shielding shell and the other corresponding shielding shell ensures the conductive connection between these shielding shells.
A fifth aspect of the invention is the shielded connector as set forth in any of the second to the fourth aspects of the invention, wherein the surface of the flange abutting against the shielded wall is formed with an annular groove near the inner edge thereof by pitting it in the direction away from the shielded wall, and the connector housing is provided with a inner flange projecting outward to be interposed between the inner wall of the annular groove and the shielded wall.
In this arrangement, the inner flange projecting outward from the connector housing is interposed between the shielded wall and the flange screwed onto the shielded wall to fix the connector housing onto the shielded wall together with the conductive member.
A sixth aspect of the invention is the shielded connector as set forth in any of the second to the fifth aspects of the invention, wherein the portion of the a
Ichioka Tetsuo
Miyazaki Sho
Autonetworks Technologies Ltd.
Gilman Alexander
Oliff & Berridg,e PLC
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