IC card with socket protecting internal circuit against...

Details IC card with socket protecting internal circuit against... IC card with socket protecting internal circuit against...

1999-03-08

2001-04-10

Nguyen, Khiem (Department: 2839)

Electrical connectors

Electromagnetic or electrostatic shield

Shielding individually surrounding or interposed between...

C439S076100, C439S946000, C361S737000

Reexamination Certificate

active

06213811

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the improvement of an IC card with socket which is inserted into and extracted from an IC card connector device.
2. Description of the Related Art
There are conventionally available IC cards with socket having a large storage capacity. The IC card with socket includes an IC composed of an ultra-high dense circuit and disposed in it and a plurality of socket contacts mounted on a socket housing.
The IC card with socket will be described based on the side elevational view of
FIG. 6
which shows the card with the main portion of it shown in a cross section. First, the IC card with socket
10
has a metal cover
11
formed to the exterior thereof and a socket housing
12
is mounted in the metal cover
11
. Disposed to the socket housing
12
are a plurality of socket inserting holes
12
a
and a plurality of pin inserting holes
12
c
disposed in connection to the socket inserting holes
12
a
. The socket inserting holes
12
a
are located on the upper and lower sides of the socket housing
12
in two rows in a lateral direction and the pin inserting holes
12
c
are located on the front surface section
12
b
of the socket housing
12
.
Socket contacts
13
are inserted into the socket inserting holes
12
a
. The socket contacts
13
have terminal sections
13
a
which extends therefrom rearward in two rows on upper and lower sides, and a substrate
14
is clamped between the terminal sections
13
a
. An IC circuit
14
a
composed of an LSI and the like having a large storage capacity are mounted on the substrate
14
.
Further, the interior of the IC card with socket
10
is sealed by the metal cover
11
on the outside periphery thereof.
In the conventional IC card with socket
10
arranged as described above, even if a finger and the like of an operator to which static electricity is charged approach the front surface section
12
b
of the socket housing
12
, since the static electricity is discharged to the metal cover
11
and removed, a failure caused by the static electricity to the IC circuit
14
a
, which is composed of the LSI and the like and mounted on the substrate
14
, can be prevented.
For example, if an operator operating the IC card with socket
10
is wearing nylon clothing, friction from the nylon clothing may create a high voltage static electricity buildup present on the operator.
When a finger and the like of the operator to which the static electricity having the large amount of charge is charged approach the front surface section
12
b
of the socket housing
12
, the static electricity may be discharged to the socket contacts
13
in the socket housing
12
. Thus, there is a possibility that a failure such as electrostatic breakdown is caused to the IC circuit
14
a
by the discharge.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an IC card with socket capable of preventing the circuit within the IC card from being damaged by a high voltage static electricity discharge present on an operator operating the IC card.
An IC card with socket of the present invention as a first means for solving the above problem comprises a plurality of socket contacts connected to the pin contacts of an IC card connector device; a socket housing to which the socket contacts are attached in parallel with each other in a lateral direction in two rows on upper and lower sides; a metal cover for covering the socket housing; and a conductive member attached to the front surface section of the socket housing into which the pin contacts of the IC card connector device are inserted, wherein the conductive member is electrically connected to the metal cover to shut off static electricity from the outside.
As a second means for solving the above problem, it is preferable that the socket housing has pin inserting holes, into which the pin contacts of the IC card connector device are inserted, formed to the front surface section and the conductive member covers the entire front surface section of the socket housing except the pin inserting holes.
As a third means for solving the above problem, it is preferable that the conductive member is molded of a metal sheet, the socket housing is molded of a resin material and the conductive member is molded and attached to the socket housing integrally therewith.
Further, it is preferable that the conductive member is molded integrally with the metal cover which is bent along the front surface section of the socket housing.


REFERENCES:
patent: 4824377 (1989-04-01), De Burro
patent: 5288247 (1994-02-01), Kaufman
patent: 5338215 (1994-08-01), Lee et al.
patent: 5342220 (1994-08-01), Kodama
patent: 5399105 (1995-03-01), Kaufman et al.
patent: 5627729 (1997-05-01), Oldendorf et al.
patent: 5700164 (1997-12-01), Weidler et al.
patent: 5896274 (1999-04-01), Ishida
patent: 6007381 (1999-12-01), Ando et al.
patent: 6-29903 (1994-08-01), None

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