Abstract: A data entry module includes a flexible substrate, a fence circuit formed on the flexible substrate and including at least one trace routed in a meandering manner, an insulating layer formed on the fence circuit, a substrate spaced from the insulating layer, and a switch circuit including a plurality of switch elements each including two contact pads separately disposed on the substrate and the insulating layer. The fence circuit is configured to cover the switch circuit for preventing the interrogation of the switch circuit.

Abstract: A device is capable of locking or unlocking a card in a card reader. An actuator carries a drive bushing onto which one end of a coil spring is mounted such that the axis of the coil spring is approximately parallel to the rotation axis of the actuator. The opposite end of the coil spring is mounted on a drive nut. A threaded shaft is fixed to a slide block with an elongated hole, and the movements of both are constrained to a single degree of freedom by the engagement of the elongated hole with a fixed pin and by the engagement of an extension of the threaded shaft with the inner hole of the drive bushing. The linear movement of the slide block causes a latch plate to move by means of a linear sliding pair between them so as to lock or unlock the inserted card.

Abstract: A security keyboard matrix scanning method for a keyboard is disclosed. This invention utilizes bi-directional input/output ports, in which each line of the X-port and the Y-port can be selectively designated as a sensing line or an output line, to construct the X-port and Y-port such that at least one line of one of the two ports can output a scanning signal representative of a dummy scanning signal at the time the actual scanning signal is output from another line of either port. Thus, the scanning method disclosed in this invention can efficiently prevent a password from being recognized by a third party for illegal use thereby enhancing the security of a password identification device.