DK2553190T3 - Protection device for a lock to protect against manipulation of the lock - Google Patents

Description

Description [0001] The present invention relates to a protecting device, including a lock, against manipulation of the lock, wherein said lock includes at least one blocking element, which, through an opening in a faceplate of the lock, can be moved forward and out of the lock into a locking position, and can be moved back into the lock into an opening position.

[0002] Locks for doors, gates, windows and the like are known to be manipulatable when a manipulation object acts upon the locking mechanics within the lock. The manipulation object may be introduced into the lock through the opening in the faceplate, because a gap is created between the blocking element and the opening. In the event a spring wire or preferably a spring plate is used as the manipulation object, in particular with non-rebated doors, the manipulation object can easily act upon the push-back stop of the blocking element, in particular upon the lever tumbler. In case the push-back stop of the blocking element, for example of a lock dead-bolt or of a lock latch-bolt, is released, the blocking element can be guided back into the opening position of the lock, and an unauthorized individual can pass the door.

[0003] The gap between the blocking element and the opening is created in particular in that a more or less large sized clearance fit between the blocking element and the opening is required. Often, the opening in the faceplate serves as the guidance of the movable blocking element, which for example may be represented by a dead-bolt or a latch-bolt. In addition, the clearance fit compensates for manufacturing tolerances of the individual structural components, whereby the gap may reach a lateral dimension of 0,5 mm for example.

[0004] Simple locks do not offer any safety precautions against a possible manipulating of the locking mechanics within the lock, such that they are categorized in a low class of burglar resistance. Higher quality locks include blocking elements which are geometrically configured in that the gap between the blocking element and the opening can be at least partially covered. For example, a blocking element may include a blocking element shank with a smaller cross-section and a blocking element head with a larger cross-section. At the transition between the blocking element shank and the blocking element head, the blocking element head may have a collar-like conformation, which, however, considerably complicates manufacturing of the blocking element. Such a configuration is for example known from the document US 4 848 118 A.

[0005] It is in particular disadvantageous in that specifically the blocking elements having a conformed manipulation protection need to be manufactured in an expensive process, for example by casting, moulding, transforming or the like. Machining the guiding surfaces, which serve for guiding the blocking element in the opening of the faceplate, is made particularly more difficult by the conformations for forming a manipulation protection, because the latter are no longer entirely flat. However, in general machining work is required, as this is the only way to manufacture sufficient smooth and dimensional precise guiding surfaces at the blocking element. For high quality dead-bolts made from stainless steel, the machining simultaneously serves for surface refinement, e.g. by means of grinding, burnishing, polishing and the like.

[0006] Also in the state-of-the-art, e. g. EP 2 105 558, it is known to dispose at least one protecting element at the blocking element such that a gap that is created between the blocking element and the opening is covered.

[0007] Therefore, it is the object of the present invention to provide a protecting device for a lock against manipulation of the lock, which can be easily manufactured and offers a high degree of security.

[0008] This problem is solved by means of a protecting device, including a lock, against manipulation of the lock according to claim 1. Advantageous further developments of the invention are indicated in the dependent claims.

[0009] In the event a protecting element is disposed at the blocking element, the gap created between the blocking element and the opening is covered to such an extent that a manipulation object can not be introduced any longer through the gap and into the lock. If it is attempted to push a manipulation object through the gap, the manipulation object abuts against the protecting element, and it will be impossible to move the manipulation object any further into the inside of the lock. The protecting element may be configured as an individual structural component which can be disposed at the blocking element. As a consequence, the blocking element may be manufactured from simple flat materials, wherein the finishing work on the guiding surfaces may be realized by simple machining operations, because the surfaces are entirely flat and conformations for forming the manipulation protection are inexistent, which would interfere with the flat machining operations.

[0010] The blocking element may include a blocking element shank and a blocking element head, wherein the protecting element is disposed at the blocking element in the area of the transition from the blocking element shank to the blocking element head. The blocking element head forms the part of the blocking element which is able to project from the faceplate of the lock, if the blocking element is moved into the locking position. The blocking element shank forms the part of the blocking element which is oriented towards the inside of the lock and the locking mechanics act upon the shank in order to induce the movement between the locking position and the opening position into the blocking element. With particular advantage, the protecting element can be disposed at the location at the blocking element at which the blocking element shank transitions to the blocking element head. Said transition location is located almost at the rear side of the faceplate when the blocking element is moved forward out of the lock and into the locking position. As a consequence, the protecting element is likewise located at the rear side at the faceplate and an access to the inside of the lock through the gap is interrupted directly behind the faceplate, if the blocking element is moved forward out of the lock in order to occupy its locking position.

[0011] The blocking element shank may have a smaller cross-section than the blocking element head and, in the area of the transition from the blocking element shank to the blocking element head, may form a blocking element edge, wherein, from the direction of the blocking element shank, the blocking element is brought into abutment against the blocking element edge. The cross-section of the blocking element may correspond to a rectangular cross-section and the rectangular cross-section of the blocking element head has longer edge lengths than the edge lengths of the rectangular cross-section of the blocking element shank. Thus, the blocking element edge is created with an edge surface which extends perpendicularly to the direction of movement of the blocking element. The protecting element can be brought into abutment against said edge surface. For this purpose the protecting element may include a passage through which the blocking element and, in particular, the blocking element shank is passed. With particular advantage, the protecting element may replicate the side ratio of the edge lengths of the rectangular cross-section of the blocking element, and a protecting element mounted to the blocking element forms a collar which surrounds the cross-section of the blocking element.

[0012] It is with advantage that the protecting element surrounds the blocking element at least partially and preferably completely such that the entire circumference of the gap between the blocking element and the opening is covered. As a consequence, no manipulation object can be introduced from either side into the gap between the blocking element and the opening in the faceplate. In particular with blocking elements having a rectangular basic cross-section, the protecting element can be configured such that the entire circumference of the blocking element is covered. According to the invention, such a protecting element has a passage through which, consequently, the blocking element is passed. A protecting element which is disposed laterally at the blocking element which is directed in the direction of a free door gap, reaches a particular protecting effect.

[0013] According to a potential advantageous embodiment of the present inventive protecting device, the protecting element may be latched, clipsed, screwed, welded, soldered, pressed and/or injection-moulded to the blocking element by means of plastic material injection moulding. With the intention to not only achieve an increased protection effect against manipulation, but also a wear protection for the protecting element, which may serve as an abutment for the blocking element at the inside of the faceplate, the protecting element may be manufactured from hardened steel.

[0014] Furthermore, the protecting element may be manufactured from the same material as the blocking element itself. Furthermore, the protecting element may be manufactured from plastic material which is spray-moulded to the blocking element. For this purpose, the blocking element has reception geometries with the intention to create a geometric form closure between the blocking element and the moulded plastic material protecting element. However, the protecting element may be in particular mounted mechanically to the blocking element, wherein the connecting structure between the protecting element and the blocking element is configured to resist sufficient load in order to prevent the protecting element from being released from a position at the blocking element by means of the manipulation object. The protecting element may be manufactured from sheet metal material by means of a bending-stamping process or else the protecting element is manufactured in a die-casting process.

[0015] The blocking element of the lock including the protecting device may be configured in different ways. For example, the blocking element may be configured as a lock dead-bolt and/or as a lock latch-bolt of the lock. Generally, a lock presents a lock dead-bolt, which is moved between the locking position in which it protrudes from the lock, and the opening position in which it is retracted into the lock. As a consequence, the lock dead-bolt serves for locking a door, without the latter being simple openable by means of a door knob. The blocking element may be likewise configured as a lock latch-bolt, which according to a general type of construction of a lock, is moveable by means of a handle between the locking position and the opening position, wherein generally, a movement of the lock latch-bolt can be realized by means of a locking cylinder. Mostly, lock latch-bolts are pretensioned into the locking position by means of a spring element, wherein furthermore locks are known, which, for blocking the lock by means of a locking cylinder, arrest the lock latch-bolt in the locking position in that a push-back stop of the lock latch-bolt is activated. Independently of the embodiment of the blocking element as a lock dead-bolt or as a lock latch-bolt, the inventive protecting element may be disposed at the blocking element.

[0016] The blocking element may be moved linearly, moved rotationally or along a trajectory within the opening in the faceplate. Linearly moved blocking elements mostly have a rectangular cross-section and have a longitudinal extension, which can be subdivided into the blocking element shank in the inner region of the lock and the blocking element head which, in the blocking position, can be moved forward out of the faceplate. Furthermore, blocking elements, which are rotationally moved forward or along a trajectory, are known and can pivot around a pivoting axis which is stationarily inserted into the lock or which can be guided in a path in order to reach the locking position in which it is moved out of the faceplate. According to the invention, the protecting element may be adapted to the embodiment type of the blocking element. The covering of the gap happens in particular if the blocking element in the locking position is moved forward and out of the faceplate, and the protecting element is adapted to the geometrical form of the blocking element.

[0017] Furthermore, the blocking element may be configured as a pivoting bolt having a pivoting bolt back, wherein the protecting element is formed as an insert element and disposed on the pivoting bolt back. According to the invention, the insert element is connected positively by material or positively by form to the blocking element, and extends just over the pivoting bolt back or else the insert element surrounds the pivoting bolt at least partially in lateral direction.

[0018] According to another advantageous embodiment, the protecting element is able to cooperate with an electrical switching means such that a control unit is able to detect the locking position of the blocking element. For example, the electrical switching means may form a switch, preferably a micro-switch, with which the protecting element mechanically cooperates, in order to activate the electrical switching means. For example, information may be transmitted to the control unit on whether the blocking element is located in the locked position or in the opening position.

[0019] With further advantage, the protecting element, in the position where it is moved forward out of the lock, may abut against the faceplate from inside the lock wherein the protecting element is configured such that the protecting element creates a dampening effect upon abutment against the faceplate. In particular in the event the protecting element is realized from plastic material, the advantageous dampening effect may be achieved. Furthermore, the protecting element may include an insert made from plastic material or from rubber, which insert dampens an inside abutment against the faceplate. If the blocking element is moved into the locking position, and if the latter projects, in particular assisted by a spring, into the locking position, a dampening effect may dampen an abutment of the protecting element against the inside of the faceplate, in particular dampens locking noises.

[0020] Further measures enhancing the invention defined by means of the patent claims will be illustrated in the following in more detail in conjunction with preferred embodiments of the present invention. It is diagrammatically shown in:

Figure 1 a perspective view of a blocking element including an exemplary embodiment of a protecting element,

Figure 2 a perspective view of an exemplary embodiment of a protecting element,

Figure 3 a lateral view of an arrangement of a blocking element in a lock in a locking position where it is projected forward out of the faceplate,

Figure 4 a blocking element which is configured as a pivoting bolt and includes two protecting elements according to a non-inventive exemplary embodiment, and

Figure 5 another embodiment of a pivoting bolt in a lock wherein another exemplary embodiment of the protecting element is illustrated.

[0021] Figure 1 shows an exemplary embodiment of a protecting device according to the present invention. The blocking element 11 is illustrated, which is configured as a lock dead-bolt having a rectangular cross-section and being introduced into an opening of a faceplate of the lock being longitudinally movable. The blocking element 11 has a blocking element shank 16 transitioning into a blocking element head 17. The blocking element shank 16 forms the part of the blocking element 11 which both in the opening position and in the locking position of the blocking element 11 remains inside the lock, i. e. behind the faceplate. However, the blocking element head 17 is projected forward out of the faceplate of the lock, when the blocking element 11 is moved into the locking position, for example for locking a door.

[0022] According to the invention, a protecting element 14 is disposed in the area of the transition of the blocking element shank 16 to the blocking element head 17. The protecting element 14 is configured as an individual part and may be in particular brought to an abutment against a blocking element edge 18, which forms the transition area between the blocking element shank 16 and the blocking element head 17. The illustration shows a protecting element 14 which forms a collar-type surrounding of the cross-section of the blocking element head 17. In this case, the collar surrounds the entire circumference of the cross-section of the blocking element head 17.

[0023] Figure 2 shows the protecting element 14 as an individual part in a perspective view. In order to pass the blocking element shank 16 through the protecting element 14, the latter has a passage 19 which is disposed in the middle of the protecting element 14. The aperture 25 shown in the protecting element 14 forms a depression in the protecting element 14 and the cross-section of the blocking element head 17 may engage in the depression 25 in the protecting element 14 such that the blocking element edge 18 of the blocking element 11 is brought into abutment against the bottom surface of the depression 25.

[0024] Figure 3 shows the arrangement of the blocking element 11 in a lock 10, the front side thereof being delimited by the faceplate 13. In this exemplary embodiment, the blocking element 11 is likewise configured as a lock dead-bolt and linearly movable, wherein the direction of movement is indicated by a double arrow. In the cross-sectional view, the protecting element 14 is shown to border the abutment at the blocking element edge 18, which forms the transition between the blocking element shank 16 and the blocking element head 17. The blocking element 11 is shown in the locking position where it projects forward out of the faceplate 13, and the protecting element 14 is bordering the inside of the faceplate 13. A gap 15 is formed between the blocking element head 17 and the opening 12 in the faceplate 13, wherein the gap 15 does not form a continuous area in the direction of the inside of the lock 10, because the gap is interrupted by the protecting element 14. If a manipulation object would be introduced through the gap 15 into the inside of the lock 10, the protecting element 14 will form a barrier, and the inside of the lock 15 is protected against a manipulation object. The protecting element 14 may be connected in different ways to the blocking element 11, preferably positively by material or positively by form. Just by way of example a welding 26 is shown, by means of which the protecting element 14 is attached positively by material to the blocking element 11.

[0025] Figure 4 shows a perspective view of a non-inventive exemplary embodiment of a blocking element 11, which is configured as a pivoting bolt. The blocking element 11 is accommodated in the lock 10 to be rotationally movable about a pivoting axis 20 and includes a plurality of plate-shaped elements, which are connected to each other, which in a package arrangement form the body of the blocking element 11 and are connected to each other via bolts.

[0026] The pivoting axis 20 is formed by means of an axle pin 24, wherein the axle pin 24 is configured as a screw element. Two protecting elements 14 are provided, which, respectively from the direction of the pivoting axis 20, are disposed laterally on both sides of the pivoting bolt. In this case, the protecting elements 14 form a collarshaped conformation 21, which in particular extends over the pivoting bolt back 22. The collar-shaped conformation 21 is respectively formed laterally of the portion of the pivoting bolt, which is located in the locking position of the pivoting bolt inside the lock 10. The protecting elements 14 are configured like shells and surround the blocking element 11 from a lateral direction. The protecting elements 14 are screwed in a captive manner to the blocking element 11 and via the axle pin 24.

[0027] Figure 5 shows a cross-sectional view through a lock 10 in the area of the faceplate 13. The blocking element 11 is likewise configured as a pivoting bolt and supported in the lock 10 to be rotatable about the pivoting axis 20. The opening 12 is shown in the faceplate 13, through which opening the blocking element 11 is able to project forward into the locking position. In this case, a gap 15 is created between the pivoting bolt back 22 and the opening 12, which gap is formed in particular between the pivoting bolt back 22 and the upper side of the opening 12. With the intention to interrupt said gap 15 as an introduction channel for a manipulation object intended to act upon the locking mechanics, a protecting element 14 is provided which is configured as an insert element 23. Said insert element is inserted on the side of the pivoting bolt back 22 and, for example, is welded or soldered to the pivoting bolt. In the position shown, the pivoting bolt is located in the locking position and projects from the faceplate 13. It can be seen, that the gap 15 is covered by the insert element 23 in the direction of the inside of the lock 10.

[0028] The configuration of the present invention as defined by the patent claims is not limited to the above presented preferred embodiments. On the contrary, a number of variants are conceivable, which make use of the illustrated solution, even with basically different types of embodiments. In particular, the embodiment of the protecting element 14 as an insert element 23 may be utilized in conjunction with blocking elements 11 which are configured as linearly moved blocking elements 11 according to the illustrations 1 and 3. Furthermore, protecting elements 14 with a rectangular basic cross-section and a central passage 19 may be utilized for blocking elements 11, which are configured as pivoting bolts according to the Figures 4 and 5.

Claims (13)

A protective device with a lock (10) for manipulating the lock (10), said lock (10) having at least one locking element (11) which can be moved forward out of the lock (10) to a closed position through an opening (12) in a latch plate (13) of the latch (10) and moved back to an opened position into the latch (10), wherein at least one protective element (14) is connected mold-closing or material-closing on the latch element (11) so that a slot (15) formed between the locking element (11) and the opening (12) is covered, the protective element (14) having a passage (19) through which the locking element (11) is passed. Protective device according to claim 1, characterized in that the locking element (11) has a locking element shaft (16) and a locking element head (17), the protective element (14) being arranged in the area at the transition from the locking element shaft (16) to the locking element head (17). ) on the locking element (11). Protective device according to claim 1 or 2, characterized in that the locking element shaft (16) has a smaller cross-section than the locking element head (17) and a locking element edge (17) is formed in the area of the transition from the locking element shaft (16) to the locking element head (17). 18), where the protective element (14) is brought from the direction of the locking element shaft (16) to abut against the locking element edge (18). Protective device according to one of claims 1 to 3, characterized in that the locking element shaft (16) is passed through the passage (19) of the protective element (14). Protective device according to one of the preceding claims, characterized in that the protective element (14) encloses the locking element (11) at least partially and preferably completely, so that the gap (15) between the locking element (11) and the opening (12) is covered completely. all the way around. Protective device according to one of the preceding claims, characterized in that the protective element (14) is engaged, clipped, screwed, welded, welded, soldered, pressed onto the locking element (11) and / or cast on the locking element (11). ) using plastic injection molding. Protective device according to one of the preceding claims, characterized in that the locking element (11) is formed as a locking bolt and / or as a locking lock of the lock (10). Protective device according to one of the preceding claims, characterized in that the locking element (11) is moved linearly, rotationally or along a path curve in the opening (12) in the locking plate (13). Protective device according to one of the preceding claims, characterized in that the locking element (11) is designed as a pivot bolt and can be rotated about a pivot axis (20) in the lock (10). Protective device according to one of the preceding claims, characterized in that the locking element (11) is formed as a pivot bolt with a pivot latching side (22), the protective element (14) being formed as an insert element (23) and arranged on the pivot latching side (22). Protective device according to one of the preceding claims, characterized in that the protective element (14) works with an electrical coupling means, so that at least one recognition of the closed position of the locking element (11) is possible by means of a control unit. 12th Protective device according to one of the preceding claims, characterized in that the protective element (14) in the position where it is moved forward from the lock, abuts on the inside of the lock against the lock plate (13) and is designed in such a way that the protective element (14) creates a damping effect upon impact against the lock plate (13).