OPTICAL SHIELD FOR KEYPAD LOCKS

Abstract

An optical shield for keypad locks that has a frame provided with one or several structures into which standard structures (C1) fit that the lock keypads (C) have; one or several side panels that project from the frame body impeding the lateral view of the keypad of the lock (C) from an area near the user who is operating it; and means to fasten indirectly the frame to the lock module/keypad (C), without interfering in it. It can also have an additional panel, mounted on the frame and capable of sliding linearly in it, and provided with a window through which one can access a restricted area of the keypad, impeding the frontal view of the rest.

Claims

1. Optical shield for keypad locks, comprising: a frame comprising: at least one structure into which standard structures fit which the lock keypads have; and one or several side panels that project from the frame body impeding the lateral view of the lock keypad from an area near the user who is operating it; and a means to fasten indirectly the frame to the lock module/keypad, without interfering with it.

2. A shield, according to claim 1, wherein the at least one structure comprises: grooves made in on its back and provided with some openings in one of its ends in order to position the standard structures in it.

3. A shield, according to claim 1, wherein the means for indirectly fastening the frame to the lock are, at least, a plate fastened to the frame closing the structures to impede the accidental or malicious removal of the frame.

4. A shield, according to claim 1, comprising: an additional panel mounted on the frame capable of sliding linearly in it and comprising at least, one window through which a restricted area of the keypad is accessed, impeding the frontal view of the rest.

Description

DESCRIPTION OF THE DRAWINGS

[0013] For a better understanding of the purpose of the invention, the attached drawings represent a preferred realisation, susceptible to changes of accessories that do not undermine its purpose. In this case:

[0014] FIG. 1a represents a general schematic view of the shield that is the subject of the invention as an example of its realization.

[0015] FIG. 1b represents a general schematic view similar to FIG. 1a, incorporated on a keypad lock (C).

[0016] FIG. 2a represents a general schematic view of the shield that is the subject of the invention as an alternative example of its realization which includes an additional panel (3).

[0017] FIG. 2b represents a general schematic view similar to FIG. 2a, incorporated on a keypad lock (C).

[0018] FIG. 2c represents a general schematic view similar to FIG. 2a, with the basic components ready for assembly as an example of its realisation.

DETAILED DESCRIPTION OF A PREFERRED REALISATION

[0019] An example of the practical realisation of this invention is described below, but not limited to it. Other modes of realisation would not be ruled out at all in which changes of accessories that do not undermine its purpose.

[0020] The purpose of the invention is an optical shield for keypad locks, which consists of, at least, a frame (1) with one or several side panels (12) that project from the frame body (1) impeding the lateral view of the keypad for the lock (C) from a location near the user who is operating it.

[0021] The cited frame (1) is provided with one or several structures (11) in which other standard structures (C1) fit, which keypads for locks (C) have as a series. The specific configuration/geometry of these structures (11), (C1), is indifferent for the effect of the invention and they can vary according to the different models/manufacturers existing in the market. It is basic for the effects of the invention that these structures fit different models without requiring any alteration in them, or in the lock or in its keypad (which are already installed and functioning).

[0022] According to the represented realisation, the cited structures (11) have vertical grooves made in the back of the frame (1), situated in pairs and provided with some openings (11a) in one of its ends. The cited standard structures (C1) are first placed at the opening (11a) and then they are slid down along the form (11) until finally the frame (1) is positioned in the area of the keypad so that the side panels (12) that project from the body of the frame (1) impede the lateral view of the keypad from an area next to the user who is operating it.

[0023] The cited frame (1) also has means (2) to fasten it indirectly to the lock module/keypad (C), without interfering with it.

[0024] For the represented realisation, the cited means (2) are, at least, a plate (21) fastened to the frame (1) closing the structures (11) to impede the accidental or malicious removal of the frame (1).

[0025] The mounting and fastening of the plate (21) in the frame (1) takes place, for example (see FIG. 2c), using a hole (22) lined up with another treaded blind hole made in the body of the frame (1); and having a tab (23) lined up with a recess made in the body of the frame (1). The fastening that impedes the undesired (accidental or malicious) removal of the shield that is the subject of the invention takes place inserting the tab (23) in the recess and inserting a safety screw (4) in the confronted holes.

[0026] The shield that is the subject of the invention, additionally, may have an additional panel (3) mounted on the frame (1) and is capable of sliding linearly in it. This additional panel (3) is provided with, at least, a window (31) through which one may access a restricted area of the keypad, impeding the frontal view of the rest.

[0027] For the represented realisation example, this additional panel (3) is placed in its guide rails (13) made in the body of the frame (1) and specifically in the base area of the side panels (12). Along these guide rails (13) the panel (3) slides at the will of the user so that its window (31) is in front of a restricted area of the lock keypad (C) impeding the frontal view of the rest; in such a way that it is practically impossible to discover which keys the user is pressing at each moment.

[0028] The materials, dimensions, proportions and, in general, those other accessory or secondary details may vary, as long as they do not alter, change or modify the proposed essential nature.

[0029] The terms in which this report is prepared are true and the faithful reflection of the described object, and should be taken in their broadest sense and never in a limiting manner.