Electrical connectors – With vitreous-type envelope – Having bayonet-coupling contact
Reexamination Certificate
1999-08-09
2001-07-10
Donovan, Lincoln (Department: 2839)
Electrical connectors
With vitreous-type envelope
Having bayonet-coupling contact
C439S394000
Reexamination Certificate
active
06257931
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to a shielded connector and more of particularly, to a shielded connector wherein a rear opening, of a shielding terminal passage for a shielded wire is closed so as to improve electrical shield.
2. Description of the Related Art
FIGS. 14 and 15
show a prior art shielded connector disclosed in Japanese patent application Laid-open No. 7-22107 (hereinafter JP'107).
A shielded connector
92
is made up of an inner terminal
90
connected to an inner conductor
89
of a shielded wire
88
, an inner housing
91
to accommodate the inner terminal
90
, a shielding terminal
71
to cover the inner housing
91
and to be connected to a shielding mesh
70
of the shielded wire
88
, and an outer housing
72
(
FIG. 15
) to accommodate the shielding terminal
71
.
The inner housing
91
is provided with a plate-like lid member
74
on the rear half portion thereof through a hinge
73
, which lid member
74
can be freely opened or closed. The lid member
74
is provided with a shielding member
75
of conductive metal, which shielding member
75
is separated from the shielding terminal
71
. The lid member
74
has an engaging portion
76
against the inner terminal
90
near the hinge. The shielding member
75
has a rear plate portion
77
with a curved groove (not shown) for dodging the inner conductor
89
of the shielded wire
88
, a plate portion
79
with an engaging opening
78
against the inner housing
91
, and a projecting portion
81
to be put into contact with an upper wall
80
of the outer housing
72
(FIG.
15
).
And, the inner housing
91
is provided with a locking lance
82
for the inner terminal
90
, and the outer housing
72
(
FIG. 15
) is provided with a locking lance
83
for the shielding terminal
71
. A front pressure fixing portion
84
of the shielding terminal
71
fixes the shielding mesh
70
of the shielded wire
88
, and a rear pressure fixing portion
85
fixes a cover
86
of the shielded wire
88
. And, the shielding terminal
71
prevents the inner terminal
90
from receiving or exhausting noise. Especially, since the shielding member
75
closes the rear opening
87
of the inner housing
91
when the lid member
74
is closed, the shielding effect in high frequency bands is improved.
With respect to the above prior art shielded connector, however, since the curved groove for the inner conductor
89
of the shielded wire
88
is formed on the rear plate portion
77
of the shielding member
75
and also a space exists between the rear plate portion
77
and the side plate portion
79
and further the engaging opening
78
exists on the side plate portion
79
, shielding of noise is not complete, which requires improvement of shielding effect. And, since the shielding member
75
is formed separately, the number of parts, the steps for mounting the shielding member
75
, and the parts represent a cost increase. Further, since assembling work of the small shielding member
75
to the lid member
74
is troublesome, easier assembling work is required.
SUMMARY OF THE INVENTION
In view of the foregoing, an object of the present invention is to provide a shielded connector having a shielding terminal with high shielding effect, wherein number of parts is decreased, the cost and assembling steps are decreased, and the assembling work is simplified.
In order to achieve the above-described object, as a first aspect of the present invention, a shielded connector includes: an inner terminal connected to an inner conductor of a shielded wire with a shielding member; an inner housing to accommodate the inner terminal; a shielding terminal to cover the inner housing and to be connected to the shielding member of the shielded wire; an outer housing to accommodate the shielding terminal; a lid member provided at a rear opening of the shielding terminal integrally therewith through a hinge; and a pressure contact portion formed on the lid member so as to press the shielding member of the shielded wire, wherein the inner terminal is electrically shielded.
According to the above-described structure, since the lid member is integrated with the shielding terminal, effective conductivity exist between the lid member and the shielding terminal, thereby improving the shielding effect for the inner terminal. And, since the lid member is put into pressure-contact with the shielding member of the shielded wire, no space exists between the shielding member and the lid member, which can enhance the shielding effect and the conductivity between the lid member and the shielding member, i.e. contact resistance between the lid member and the shielding member can be reduced, thereby grounding noise from the lid member to the shielding member and then further improving the shielding effect. Further, since the lid member is integrated with the shielding terminal, the number of parts decreases, thereby decreasing the parts cost, and the assembly cost and also simplifying the assembly work.
As a second aspect of the present invention, the shielded connector with the above first aspect further includes a spacer to be inserted into the outer housing through an insertion hole provided thereon, which spacer has an engaging plate to lock the shielding terminal to the outer housing.
According to the above-described structure, the shielding terminal can be double locked to the outer housing by the engaging plate and by another conventional means.
And, as a third aspect of the present invention, in the shielded connector of the above second aspect, the engaging plate of the spacer has a pressing portion to press the lid member on the shielding member of the shielded wire.
According to the above-described structure, since the lid member is put into pressure-contact with the shielding member of the shielded wire, conductivity between the lid member and the shielding member is further heightened and the shielding effect is further improved.
REFERENCES:
patent: 5180316 (1993-01-01), Miller et al.
patent: 5429529 (1995-07-01), Hashizawa et al.
patent: 5498176 (1996-03-01), Hashizawa et al.
patent: 5501615 (1996-03-01), Inaba et al.
patent: 5618198 (1997-04-01), Masuda et al.
patent: 0 608 863 (1994-08-01), None
patent: 0 709 929 (1996-05-01), None
patent: 0 800 238 (1997-10-01), None
patent: 7-22107 (1995-01-01), None
Patent Abstracts of Japan, vol. 199, No. 504, May 31, 1995 & JP 07 022107A (Yazaki) Jan. 24, 1995 *abstract*.
Ito Noriko
Ozaki Masahito
Sakurai Kazuaki
Armstrong, Westerman Hattori, McLeland & Naughton
Donovan Lincoln
Le Thanh-Tam
Yazaki -Corporation
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