ES2273566B1 - SECURITY DEVICE FOR LOCK CYLINDERS. - Google Patents

Abstract

A security device for lock cylinders, which consist of a plug-rotor (1) which is rotatable in a cavity of a lock cylinder housing (2), which locks use true keys (4) in which the combination for opening is by means of peaks and valleys of different sizes, with the valleys operating in conjunction with respective pairs of pins (5, 6), which each comprise a plug-rotor pin (5) and a lock cylinder housing pin (6) which is loaded by a spring (7), and the plug-rotor (1) incorporating a keyway (8) for insertion of the true key (4), in which there is provided a usual virtual line (9) corresponding to longitudinal alignment of the tips of the plug-rotor pins (5) when no key is inserted; characterised in that at least one of the plug-rotor pins (5) is formed as a security pin (10) which includes some end means which prevents the security pin (10) from reaching the usual virtual line (9) in the state in which the true key (4) is not inserted or the lock is empty, and its advance reaches only a virtual security line (9B) which is shorter than that of the usual virtual line (9).

Description

Safety device for cylinders locks

Field of the Invention

This invention concerns a device of safety for cylinder locks that is especially designed for locks consisting of a rotor that rotates in the within a stator, whose locks use valid keys in the that the opening combination is carved by succession of summits and valleys of varying breadth in which the valleys operate in conjunction with two pairs of pythons that, in relation to their complete accommodation in the key opening position, consist of a rotor python (because it will rotate with the rotor) and of a python of stator (because it remains in the stator) that is loaded to spring, whose rotor incorporates the key insertion channel in which is defined a virtual line according to which remain longitudinally aligned the tips of the rotor pythons in The key state not inserted.

Prior art

In relation to the type of lock reviewed is known from relatively recent dates a procedure of rape that brings together great effectiveness and great simplicity of execution that is available to individuals without have a great skill or be especially experts, be trained in a short space of time, in this dangerous practice.

For explanatory simplicity throughout the exhibition we are going to refer to a European profile cylinder with pear-shaped stator and a key with combination footprints jagged in his song. But obviously it is equally extensive to American profile cylinders (circular) and with keys of the called flat with combination footprints in the plane of your shovel.

The violation procedure consists of prepare a false key in which the valleys of your teeth are carved with a depth capable of receiving the tip of the rotor pythons in their most advanced position corresponding to false key status not inserted, while the seatpost or body of this false key is lowered, in its penetration stop, somewhat more than what would correspond to the valid key, so that your penetration stop in the channel of the valid key delayed and the fake key can penetrate the channel more than a normal. With this fake key so prepared, proceed to your introduction into the channel to the effect of the rotor in two phases sequential; In the first, it is inserted until your teeth they reach the tips of the corresponding pythons rotor without trying to exceed them; in the second, there is a dry impact on the fake key head and immediately he prints a spin pulse and, although surprising, the rotor rotates and the lock opens.

Some analysis on this phenomenon has led others to conclude that the impact on the key false is transmitted by the teeth to the rotor pythons which, at in turn, transmit them to the stator pythons that retract against their springs so that for a brief moment they enable the possibility of rotation of the rotor. Based on this analysis it is known a solution attempt consisting of dividing the pythons rotor in two parts and install a second spring between them weaker than the one associated with stator pythons; from this mode is intended that the impact energy be damped in the rotor pythons and not transmitted to the stator pythons. However, this attempt has not been successful and this serious problem Still not solved so far.

Explanation of the invention and advantages

Faced with this state of affairs, the present invention advocates a safety device for cylinders of locks that, as described, consist of a rotating rotor within a stator, whose locks use valid keys in which the combination of opening through summits and valleys of diverse breadth in which the valleys operate in conjunction with two pairs of pythons that, in relation to their complete accommodation in the key opening position, consist of a rotor python and a stator python that is spring loaded, whose rotor incorporates the key insertion channel in which it is defined a usual virtual line according to which they are aligned longitudinally the tips of the rotor pythons in the state valid key not inserted, at least one of the rotor pythons, that we will call security python, it has some stopper means that prevent reaching the usual virtual line of others in the key state not inserted or empty and its prominence only reaches a virtual security line lower than that virtual line usual.

Against the above exposed this recommended constitution is based on a different analysis of phenomenon, which has been studied experimentally with the result of deduce that the impact given to the false key is that among the rotor pythons and their respective stator pythons takes place a shock of elastic type that causes them to repel separating what enough and for enough time to be enabled the rotation of the rotor and the opening of the lock. In this repulsion the stator pythons go against their spring and rotor pythons have plenty of space foster care in the deep valleys carved into the teeth of the fake or trick key. On the other hand, this operating model of the phenomenon for which the violation of closure, allows to verify the lack of effectiveness of the given solution so far based on an analysis that is revealed as wrong.

Within the scope of this invention it is comprised an embodiment of said stop means, consisting of that, behind its tip and on its periphery, said python of security incorporates a projection that operates in conjunction with a internal step of the rotor hole in which you play slidingly this safety python, whose protrusion and step are sized according to the desired distance between the more advanced position of the safety python tip and said virtual line when the valid key is not inserted.

This solution of the present invention is simple and derives from a correct and accurate observation of the phenomenon, having proven its effectiveness experimentally as a security element against the new violation mode of These locks have been described. Its functionality results evident: that rotor python that responds to the essence of invention is not affected by the violating maneuver given that its tip is not contacted by the teeth of the false key and, consequently, the spring-loaded stator python it will be traversed in the rotary plane of the rotor preventing this one can rotate although the other games of python couples have succumbed to the violating action of the lock. Interest highlight the fact that this invention, to be effective, only requires its application to only one of the rotor pythons, as well like this rotor python can be any one of all that owns the lock and that this python can have lengths variables, to make location more difficult and configuration of active elements that make opening difficult. In addition, as will be seen in the aforementioned detailed description that follows, the invention can be realized so that in the process productive it is possible to select which of the rotor pythons will be the one affected by it in each manufactured lock, and so constitutes an additional security, being unknown what it is that one in each lock put up for sale.

In the detailed description that follows are illustrated these particularities of the invention and some modes of preferred execution of said stop means for at least one of said rotor pythons.

Drawings and references

To better understand the nature of the present invention, in the accompanying drawings we represent a preferred form of industrial realization, which is exemplary merely illustrative and not limiting.

Figure 1 is a longitudinal section of a exterior / interior double body lock that is constituted according to the invention. It includes expanded details of the device recommended in two operating situations: left, corresponding to when the key is inserted valid (4); and to the right, the one that corresponds to the key does not inserted, or resting.

Figure 2 is a sectional view showing a lock body like the one on the left side of figure 1, but in the manner known so far, that is, without incorporating the device of the invention; it is not introduced the key.

Figures 3 and 4 are seen as that of the Figure 2 illustrating the operating sequence used to violate the closure. Figure 3 shows the first half of the violating maneuver. Figure 4 shows the second half of this maneuver.

Figures 5 and 6 are respectively equivalent to figures 3 and 4, but referred to a body of lock that, like the one on the left side of figure 1, is equipped with the device of the invention.

Figure 7 is equivalent to the detail of the left part of figure 1 in which the internal step is the result of a python hole machining operation of security.

In these figures the following are indicated references:

one.-

Lock rotor

2.-

Lock stator

3.-

Stator Radial Extension (2)

4.-

Valid Lock Key

5.-

Rotor python (1)

6.-

Stator Python (2)

6b.-

Contrapitón or upper python

7.-

Stator Python Spring (2)

8.-

Rotor channel (1) for valid key (4)

9.-

Usual virtual line reached in empty by the usual rotor pythons (5)

9b.-

Virtual security line reached empty by the safety python (10)

10.-

Safety Python, rotor (one)

eleven.-

Security Python protrusion (10)

12.-

Internal step in hole (13)

13.-

Security Python Hole (10)

14.-

Fake key

fifteen.-

Rigid elastic bush or washer rigid elastic

Exhibition of a preferred embodiment

Regarding the drawings and references listed above, a form is illustrated in the attached drawings preferred execution referred to a safety device for cylinder locks, consisting of a rotor (1) that rotates in the sine of a stator (2), whose locks use valid keys (4) in which the combination of opening through summits and valleys of diverse breadth in which the valleys operate in conjunction with two pairs of pythons (5-6) that, in relation to your complete accommodation in the key opening position, they consist of a rotor python (5) and a stator python (6) that It is spring loaded (7), whose rotor (1) incorporates the channel (8) for inserting the valid key (4) in which a usual virtual line (9) according to which they are aligned longitudinally the tips of the rotor pythons (5) in the key state (4) not inserted or empty.

As reflected in Figure 1, this device of the invention offers the particularity that at least one of the rotor pythons (5), which we will call safety python (10), has a stop means that prevent you from reaching this virtual line usual (9) of the others in the non-inserted or empty key state and its prominence only reaches a virtual security line (9b) inferior to that usual virtual line (9); being in this respect a preferred mode of execution which said stop means consist of that, behind its tip and on its periphery, said safety python (10) incorporates a projection (11) that operates in conjunction with an internal step (12) of the hole (13) of the rotor (1) in which this safety python slides (10), whose projection (11) and step (12) are sized according to of the desired distance between the virtual line position of safety (9b) of the tip of the safety python (10) and said usual virtual line (9) when the key is not inserted.

This constitution radically prevents the rape maneuver that you want to prevent can be effective. In In effect, this maneuver, illustrated in Figures 3 and 4, consists of prepare a fake wrench (14) with a regular serrated of ridges and valleys, where the ridges are located exceeding said line usual virtual (9) that defines the geometric place of the tips of the rotor pythons (5) at rest and where the valleys are deep enough to accommodate these rotor pythons (5) when they are fully included in the rotor (1), that is to say, enabling the rotation of this one that opens the lock; then, the violating maneuver consists in first introducing the fake wrench (14) until the ridges of its teeth (figure 3) they reach to contact with the previous side of the tips of the rotor pythons (5), and second, apply on the head of the fake key (14) a dry impact that produces the result represented in figure 4, where the rotor pythons (5) and the stator pythons (6) are repelled from each other enabling rotation of the rotor (1) that opens the lock; the effectiveness of the latter operation is favored by the reduction of more produced in the seat next to the fake key blade (14).

Well, according to the device of the invention, at least one of the rotor pythons (5), designated as security python (10), never reaches said virtual line usual (9), but, except in the presence of the valid key (4), no it reaches the plane of rotation of the rotor leaving therefore the rotation of the rotor blocked by the counter or upper python (6b); by therefore, the violating maneuver explained is unable to modify its status and, although the other rotor and stator pythons (5, 6) succumb to this violating action, the python (6b) is responsible for keep the rotor opening rotation locked (1).

This solution is as simple as it is effective and provides additional assurance that in the production process one or the other of the rotor pythons can be chosen randomly (5) to incorporate this advocated security device and become a safety python (10), so that from the outside it is not known which of them has been chosen. Not even length of it, which will be selected based on the carving of the key presented to the assembly and since this carving is random, the mounted python is unpredictable.

As for the way to constitute said internal step (12) of the hole (13), there are several simple possibilities. Among them, the one that said internal step (12) is constituted by an elastic or rigid bushing that fit properly in the hole (13); or how about a step internal (12) is constituted by an elastic washer or rigid installed in said hole (13) and / or in the python itself security (10).

Also the projection (11) of the safety python (10) supports multiple simple solutions, preferably execution which consists of a perimeter thickening that gives this safety python (10) a mushroom shape inverted

This description of the invention referred to European profile cylinders is equally applicable to known American profile with circular stator. Likewise described, represented as keys with combination fingerprints carved on their singing is also applicable to keys called flat in which the combination footprints are carved on the flat surface of its shovel and have a truncated conical shape. In either case the combination is achieved by the conjunction of summits and valleys.

Claims (9)

1. Safety device for cylinder locks, consisting of a rotor (1) that rotates within a stator (2), whose locks employ valid keys (4) in which the combination of opening through peaks and valleys of different amplitude in which the valleys operate in conjunction with two pairs of pythons (5-6) which, in relation to their complete accommodation in the key opening position, consist of a rotor python (5) and a python of stator (6) that is spring loaded (7), whose rotor (1) incorporates the channel (8) for inserting the valid key (4) in which a usual virtual line (9) is defined according to which they are aligned longitudinally the tips of the rotor pythons (5) in the uninserted or empty key state, characterized in that, at least one of the rotor pythons (5), which we will call safety python (10), has stop means that prevent you from reaching that usual virtual line (9) of others in the key state not inserted or empty and its prominence only reaches a virtual security line (9b) lower than that usual virtual line (9). 2. Safety device for cylinder locks, according to the first claim, characterized in that said stop means means that, behind its tip and its periphery, said safety python (10) incorporates a projection (11) which operates in conjunction with an internal step (12) of the hole (13) of the rotor (1) in which this safety python (10) slides, whose projection (11) and step (12) are sized according to the desired distance between the virtual security line position (9b) of the security python tip (10) and said usual virtual line (9) when the key is not inserted. 3. Safety device for cylinder locks, according to the second claim, characterized in that the length of the safety python (10) and / or the position of the internal step (12) that determines the depth of the hole (13) is provided that can be variable. 4. Safety device for cylinder locks, according to the second claim, characterized in that said internal step (12) consists of an elastic bushing. 5. Safety device for cylinder locks, according to the second claim, characterized in that said internal step (12) consists of a rigid bushing. 6. Safety device for cylinder locks, according to the second claim, characterized in that said internal step (12) consists of an elastic washer. 7. Safety device for cylinder locks, according to the second claim, characterized in that said internal step (12) consists of a rigid washer. 8. Safety device for cylinder locks, according to the second claim, characterized in that said internal step (12) is the result of a machining operation of said hole (13) of the safety python (10). 9. Safety device for cylinder locks, according to any of the preceding claims, characterized in that said internal step (12) can be executed in any of the positions (6) of stator pythons.