公开(公告)号：US20100172033A1

公开(公告)日：2010-07-08

申请号：US12294803

申请日：2007-03-28

Applicant: Neil Radford

Inventor： Neil Radford

IPC: G02B27/02 ,  G02B3/08

CPC classification number: G07F19/205 ,  G06F3/0219 ,  G06F21/83 ,  G07F19/20 ,  G07F19/201

Abstract: A keypad security device (100) comprises an enclosure having a viewing aperture (114) and an access aperture (152). The enclosure at least partially surrounds a keypad such that the keypad is viewable through the viewing aperture (114) and accessible by a user through the access aperture (152). The viewing aperture includes a security pane (116) arranged so as to permit the keypad to be viewed clearly from the point of view of a user of the keypad and to prevent the keypad from being viewed from the point of view of a person other than the user, wherein the security pane (116) is curved and comprises a flexible refractive lens.

Abstract translation: 键盘安全装置（100）包括具有观察孔（114）和存取孔（152）的外壳。 外壳至少部分地围绕键盘，使得键盘可通过观察孔（114）观看，并且可由用户通过存取孔（152）访问。 观察孔包括安全窗格（116），安全窗格（116）被布置成允许从键盘的用户的观点清楚地观看小键盘，并且防止小键盘从人以外的角度来观看 所述用户，其中所述安全窗格（116）是弯曲的并且包括柔性折射透镜。