Loading patent…
AssigneeGRG Banking Equipment Co., Ltd.
InventorsJunkun Zhang, Zhulong Lin, Jing He, Ying Han
Estimating the term…
An enhanced encryption keypad (100) capable of preventing illegal disassembly for an automated teller machine comprises a key panel (101) and a main control board (102). A removal detection protection circuit is disposed inside a main chip of the main control board (102), and at least one pin of the removal detection protection circuit is guided out from a surface (1021) of a side of the main control board (102) near the key panel to form a removal detection point (1022). The removal detection point (1022) has two opened signal contact points. The two opened signal contact points are conducted by a conductive adhesive (103) to activate the removal detection protection circuit. A conductive protection ring (1023) isolated from the removal detection point is disposed at the periphery of the removal detection point. The conductive protection ring (1023) is connected to the removal detection protection circuit inside the main control chip. A protection circle (1024) is disposed at the periphery of the conductive protection ring and the corresponding conductive adhesive. The present application effectively protects the encryption keypad from illegal attacks on the removal detection point from the side.
An encryption keyboard for preventing illegal disassembly, comprising a keystroke panel and a main control board, wherein a removal detection and protection circuit is provided in a main chip of the main control board, at least one lead pin of the removal detection and protection circuit is led out from a surface of the main control board adjacent to the keystroke panel so as to form a removal detection point, the removal detection point is provided with two disconnected signal contacts which are connected by conductive adhesive to activate the removal detection and protection circuit, a conductive protection ring is provided outside the removal detection point and is isolated from the removal detection point, the conductive protection ring is connected to the removal detection and protection circuit in the main chip, characterized in that, a guard member is provided at the outside of the conductive protection ring and of the conductive adhesive.
Dependencies are inferred from the claim text.