Registers – Coded record sensors – Particular sensor structure
Reexamination Certificate
2000-12-28
2004-12-28
Lee, Michael G. (Department: 2876)
Registers
Coded record sensors
Particular sensor structure
C235S439000, C235S441000
Reexamination Certificate
active
06834801
ABSTRACT:
BACKGROUND OF THE INVENTION
a) Field of the Invention
The present invention relates to a contacts block mechanism of an IC contact card reader. More specifically, the present invention relates to an improvement of the contacts block mechanism that transmits signals by contacting input/output terminals of an IC card.
b) Description of the Related Art
FIG. 15
illustrates a contacts block mechanism
101
in an IC contact card reader. A contacts block
105
for retaining/holding contacts
104
is lowered to a predetermined position to bring the contacts
104
of the card reader into contact with an input/output terminal
103
on the IC card
102
. The contacts block
105
is turned with a fulcrum
109
as a center by moving a swing arm
108
with an actuator
106
such as a solenoid.
When the contacts block
105
is made movable in the above manner, a connection cable
107
having flexibility such as a flexible printed cable (hereinafter denoted as to “FPC”) or a lead is used to connect the contacts
104
held by the contacts block
105
and an IC card control circuit board (not illustrated) provided in the IC card reader main body. The connection cable
107
follows the contacts block
105
so that the movement of the contacts block
105
is not hindered.
However, in the contacts block mechanism
101
with the above mentioned configuration, the electrically connected distance between the input/output terminals
103
on the IC card
102
and the IC card control circuit board is long. When an FPC or a lead is used, the mechanism is vulnerable to noise caused between the lines (cross-talk), disturbance, etc. When the signal lines of the connection cable
107
are wired in parallel over a long distance, the cross-talk occurs as an interference between the signals at the peaks or valleys of the signals, causing errors in operation. This is of serious concern in data transmission of the IC card
102
at high speed.
In prior technology, a condenser may be mounted between the terminals to remove noise. However, its effectiveness will be reduced because of the corrupted (or rounding) clock signals. Further, a FPC may be shielded or a shielded lead may be used. However, this method increases the rigidity of the connection cable
107
, possibly obstructing the movement of the contacts block
105
.
OBJECT AND SUMMARY OF THE INVENTION
An objective of the present invention is to provide a contacts block mechanism of an IC contact card reader that can prevent noise from occurring in a connection cable between an IC card and a control circuit board to protect [the signal transmission] from being affected by noise.
In accordance with the invention, a contacts block mechanism of an IC contact reader having a contacts block that contacts an input/output terminal on a card surface of an IC contact card for signal transmissions comprises contacts placed in the contact block for making contact with the input/output terminal, contacts attach/detach means for moving the contacts block into contact with or away from the input/output terminal and an IC card control circuit board, to which one end of the contacts is electrically connected for signal transmissions with the IC card.
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patent: 5984183 (1999-11-01), Moriya
patent: 5984184 (1999-11-01), Kojima
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English Abstract of JP 08 007052.
Ishikawa Kazutoshi
Yamamoto Hisashi
Franklin Jamara A.
Lee Michael G.
Reed Smith LLP
Sankyo Seiki Mfg. Co. Ltd.
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