| 摘要 |
A card reader has a guide channel followed by a connector and it includes a cradle pivoting about a stationary axis, a roller whose axis is parallel to the stationary axis being mounted in the cradle with freedom to move in translation along a direction INCREMENT perpendicular to the roller axis, said direction INCREMENT being at an acute angle alpha to the direction in which the guide channel extends, the cradle including resilient return means urging the angle alpha to close and drive means acting on command and of greater power than said return means to urge said angle alpha to open. The roller includes resilient means urging it along the direction INCREMENT towards the vertex of the angle alpha . When the reader is in the rest position, the roller obstructs said channel, when a card is fully inserted in the reader, at least a portion of the card remains outside the reader, the cradle being in abutment in a position where the angle alpha is less than the angle beta whose tangent is equal to the coefficient of friction mu between the roller and the card. The drive means are powered after the card has been processed so as to open the angle alpha and enable the card to be withdrawn.
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