Electrical connectors – With circuit conductors and safety grounding provision
Reexamination Certificate
2000-11-21
2001-11-06
Bradley, Paula (Department: 2833)
Electrical connectors
With circuit conductors and safety grounding provision
C439S669000, C439S939000
Reexamination Certificate
active
06312267
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an audio connector grounding piece, and especially to an improved integral ground piece for a three stage plug connector.
BACKGROUND OF THE INVENTION
Audio connectors are installed in computers for being connected with a stereo.
FIG. 1
shows a prior art structure which has an insulting seat
1
. A rear end surface of the insulating seat
1
is connected to a rear cover
17
. The insulating seat
1
is fixed to four terminals via a plurality of positioning grooves. Since these terminals serve to transfer signals and has no relation to the ground piece, their details will not be further described herein.
A protruded round cylinder
14
is formed at one front surface of the insulating seat
1
. Then, the round cylinder
14
is engaged with a respective terminal so that the plug of a stereo may insert into the round cylinder
14
so as to be in contact with the terminals.
A ground piece
10
is installed for abating the interfering effects of noise. One end of the ground piece
10
is bent as an inserting end
11
for being inserted into an embedded groove
13
of the insulating seat
1
. The embedded groove
13
is positioned at the bottom of the insulating seat
1
near the front end. The engagement of the inserting end
11
with the embedded groove
13
prevents the ground piece
10
from sliding.
The inserting end
11
and the body of the ground piece
10
are formed as a tilt hook. The body includes a frame type ground portion
12
which extends about the periphery of the round cylinder
14
. The inserting end
11
has an L shape for being positioned in the embedded groove
13
.
A further grounding terminal
15
is installed. The grounding terminal has an approximate T shape. The transverse section thereof is engaged to a retaining groove
16
at the bottom of the insulating seat
1
. Meanwhile, the front end of the transverse section extends forward so as to be connected to the ground piece
10
. A longitudinal section of the grounding terminal
15
is a pin portion. This pin portion and the pins of the terminals can be inserted into a mother board so that the whole connector is fixed to the mother board, and the ground piece
10
is placed in contact with the casing.
Through the grounding terminal, electromagnetic waves are guided into a wave removing circuit on the mother board so that the interference is reduced to a minimum. Consequently, the quality of signal transmission is preserved. However, the prior art ground piece
10
cannot be securely fixed and tends to easily fall off so as to deteriorate the transmission of signals. There is a need to remedy this problem.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide an audio connector grounding piece which improves upon the prior art. The inner ground piece is redesigned for matching with a separable insulating cover on the primary seat. The length of the primary seat is reduced so that the primary seat can be controlled more precisely and yield ratio may be improved. The ground piece can be easily assembled to the primary seat. The ground piece is thus firmly affixed such that the stability of signal transmission with the ground piece is improved. The point contact between the prior art ground piece and the prior art ground leg is replaced by a surface contact so that the conduction speed is quicker.
To achieve these objects, the present invention provides an audio connector grounding piece. A primary seat has an inserting hole facing outwards, and the grounding piece is installed at a front end surface of the primary seat. An edge of the inserting hole is formed with an annular groove; and, the inner surface of the annular groove is formed with a cambered strip. A top surface and a bottom surface of the primary seat are installed with a pair of buckles and with two inward folded edges defining a substantial U-shape. Buckles are embedded into the respective grooves at two ends of a frame. A lower end plate of the frame is connected to a ground leg; and, the lateral plate of the frame has formed therein a through hole. A ground piece folded to define two halves is buckled to the inner folded edge of the primary seat by the outer folding at a top of the longitudinal plate. The ground piece has a longitudinal plate and a tilt plate each of which has a respective hole. The outer surface of a bushing has three stages which are incrementally reduced in diametric dimension towards the primary seat. An insulating cover has an outer end which has an annular tench for being connected with and positioning the outer section of the bushing. The insulating cover passes through the ground piece and frame to be fixed to the annular groove of the primary seat.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawings.
REFERENCES:
patent: 5622523 (1997-04-01), Kan et al.
patent: 5913698 (1999-06-01), Keng
patent: 6093058 (2000-07-01), Wu
patent: 6168448 (2001-01-01), Chang
patent: 6190205 (2001-02-01), Wu
patent: 6213812 (2001-04-01), Kan
patent: 6220898 (2001-04-01), Wu
patent: 6220899 (2001-04-01), Suzuki
Bradley Paula
Leon Edwin A.
Rosenberg , Klein & Lee
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