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(11) | EP 4 421 272 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | A LOCK CYLINDER MECHANISM WITH ANTI-THEFT FUNCTION |
| (57) A lock cylinder mechanism with anti-theft function, comprises a lock cylinder assembly
comprising a lock cylinder shaft sleeve, a lock cylinder block inserted in the lock
cylinder shaft sleeve in a rotating fit, a key slot arranged in the said lock cylinder
block and a retractable row of coded pin tumblers arranged on at least one inner wall
of the slot. The key to the lock cylinder assembly has upper and lower end faces of
the key being provided with coded slots matched with the coded pin tumbler. The inner
side wall of the said key slot is provided with a through slot which penetrates through
the lock cylinder block while the said through slot is internally provided with an
auxiliary pin tumbler which is a sliding fit, and the wall of the key slot is provided with a positioning slot which intersects with the key slot; the said positioning slot is internally provided with a positioning pin; the top end surface of the insertion end of the key is provided with at least one open slot adapted to engage with or locate on the positioning pin, and the upper and lower end surfaces of the key are provided with at least one clamping slot to engage with the auxiliary pin tumbler. |
[0001] The present specification relates to the technical field of locks, in particular to a lock cylinder mechanism with anti-theft function.
[0002] The opening and closing mechanism of the lock cylinder in the lock, which comprises a lock cylinder module and a matched key; coded slots are designed on the two sides of the key. When the key is inserted into the lock cylinder, the lock cylinder can be opened after the coded slot is matched with the pin tumbler in the lock cylinder. The matching mode of opening and closing of the lock cylinder enjoys the disadvantages that the coded slot on the key is easy to be copied and the anti-theft performance is low, which tremendously reduces the safety performance of the lock and influences the use quality of the lock. In view of this problem, the invention applied provides a lock cylinder mechanism with higher anti-theft performance which increases the difficulty of key copying.
[0003] In view of the shortcomings in the prior art, the object of the present invention is to provide a lock cylinder mechanism characterized by high safety performance and strong anti-theft performance.
[0004] According to the present invention, there is provided a lock cylinder mechanism according to claim 1.
[0005] By employing the above technical scheme, the structure of the positioning pin and the auxiliary pin tumbler is added in the lock cylinder assembly; the key for unlocking must meet the adaptability not only with the coded pin tumbler, but also with the positioning pin and the auxiliary pin tumblers, which increases the difficulty of unlocking the lock and copying the key, thereby enhancing the anti-theft performance of the whole lock.
[0006] In this specification an apparatus/method/product "comprising" certain features is intended to be interpreted as meaning that it includes those features, but that it does not exclude the presence of other features.
[0007] The invention will now be described, by way of example, with reference to the drawings, of which
Figure 1 is a schematic view of the partial structure of the present invention;
Figure 2 is a transverse partial sectional view of the present invention;
Figure 3 is a schematic diagram of the partial structure of the lock cylinder block;
Figure 4 is a longitudinal partial sectional view of the present invention;
Figure 5 is a partial enlarged view of the key;
Figure 6 is a schematic diagram of the structure of the present invention.
[0008] The structure, proportion and size, etc. demonstrated in the attached drawings to this Specification are only used to match the contents disclosed in this Specification for people familiar with this technology to understand and read, and are not intended to limit the conditions for the implementation of the present invention, so it is not endowed with substantive significance technically. Without influencing the efficacy and purpose of the present invention, any modification of the structure, change of proportion or adjustment of size shall still fall within the scope of the technical contents disclosed by the present invention. Meanwhile, the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this Specification are only for the convenience of description and are not intended to limit the implementable scope of the present invention. The change or adjustment of the relative relationship thereof, without substantial change in technical content, shall also be deemed as the implementable scope of the present invention.
[0009] The embodiment of the present invention will be further explained with reference to Figure 1 to Figure 6.
[0010] Referring to figure 6, a lock cylinder mechanism with anti-theft function comprises a lock cylinder assembly 1 and a key 2 to the lock cylinder assembly. The said lock cylinder assembly 1 comprises a lock cylinder shaft sleeve 10 and a lock cylinder block 11 inserted in the lock cylinder shaft sleeve 10 in a rotating fit. Referring to figures 1 and 2, a key slot 110 is provided in the said lock cylinder block 11, and a row of retractable coded pin tumblers 35 are arranged on the upper and lower inner walls of the said slot. Referring to figure 5, the upper and lower end faces of the key 2 are provided with coded slots 36 matched with the coded pin tumbler rows. Referring to figures 1 and 2, the inner side wall of the said key slot 110 is provided with a through slot 111 which extends through the lock cylinder block 11, the said through slot 111 being internally provided with an auxiliary pin tumbler 3 which is a sliding fit. Referring to figures 1 and 4, the key slot 110 is provided with a positioning slot 112 which intersects with the key slot 110 and ideally extends through the upper and lower wall of the key slot 110, and this positioning slot 112 is internally provided with a positioning pin 4. Referring to figure 5, the top end surface of the insertion end of the key 2 is provided with open slots 20 adapted to correspond to the positioning pin 4. The upper and lower end surfaces of the key 2 are provided with clamping slots 21 (only one being visible) which interact with the auxiliary pin tumbler 3. The said open slots 20 are symmetrically arranged at the insertion end of the key 2; the said clamping slots 21 are located at the central axis of the upper and lower end faces of the key 2 and are close to the open slot 20; this allows for the possible that the key can be used either way up. The cross section of the said clamping slots 21 is set in a decreasing or tapering manner from the open end to the bottom, and an inclined guide slope is formed on the side walls of the clamping slot 21. The lower end of the said auxiliary pin tumbler 3 is provided with a conical plug block 30, though the upper end may also be provided with a conical plug block 30.
[0011] The lock cylinder mechanism can be used in both split locks and integrated locks. When unlocking; a matched key 2 is inserted into the key clamping slot 110; the coded pin tumblers 35 fall into the coded clamping slots 36 on the end face of the key 2; the auxiliary pin tumbler 3 falls into the clamping slot 21, the guide slope on the inner wall of the clamping slot 21 increases the accuracy of the falling of the auxiliary pin tumbler 3. The open clamping slot 20 abuts the positioning pin 4. At this point, by rotating the key 2, the lock cylinder block 11 can be driven to rotate, so that the lock cylinder can be opened normally. The lock cylinder block 11 cannot be driven to rotate if the inserted key 2 is not provided with the structure of the open clamping slot 20 and the clamping slot 21, or the positions of the open clamping slot 20 and the clamping slot 21 are not accurate, thereby increasing the difficulty of copying the key 2. Increasing the matching degree requirement between the key 2 and the lock cylinder block 11 in this manner enhances the safety performance of the lock.
[0012] The above is merely the preferred embodiment of the present invention. The protection scope of the present invention is not only confined to the above embodiment, and all technical schemes in line with the idea of the present invention falls within the protection scope of the present invention. It should be stated that for ordinary technicians in this technical field, several improvements and embellishments without departing from the principles of the present invention should be considered as falling into the protection scope of the present invention as well. More than one auxiliary pin tumbler (and associated through slot) could be provided in the lock cylinder.
1. A lock cylinder mechanism with anti-theft function, comprising;
a lock cylinder assembly comprising;
a lock cylinder shaft sleeve;
a lock cylinder block inserted in the lock cylinder shaft sleeve in a rotating fit;
a key slot arranged in the said lock cylinder block; and
a retractable row of coded pin tumblers arranged on at least one inner wall of the slot;
and a key to the lock cylinder assembly, the upper and lower end faces of the key being provided with coded slots matched with the coded pin tumbler;
characterized in that
the inner side wall of the said key slot is provided with a through slot which penetrates through the lock cylinder block; the said through slot is internally provided with an auxiliary pin tumbler which is a sliding fit;
the wall of the key slot is provided with a positioning slot which intersects with the key slot;
the said positioning slot is internally provided with a positioning pin; the top end surface of the insertion end of the key is provided with at least one open slot adapted to engage with or locate on the positioning pin; and
the upper and lower end surfaces of the key are provided with at least one clamping slot to engage with the auxiliary pin tumbler.
2. A lock cylinder mechanism with anti-theft function said according to claim 1, characterized in that at least two open slots are symmetrically arranged at the insertion end of the key,
and the said clamping slot is located at the central axis of the upper and lower end
faces of the key and close to the open slot.
3. A lock cylinder mechanism with anti-theft function said according to claim 2, characterized in that the cross section of the said clamping slot is set in a decreasing or tapering manner
from the open end to the bottom and an inclined guide slope is formed on the side
wall of the clamping slot.
4. A lock cylinder mechanism with anti-theft function said according to claim 1, characterized in that a conical plug block are arranged at the lower end of the said auxiliary pin tumbler.
5. A lock cylinder assembly according to any previous claim.
6. A key according to any of claims 1 to 4.