Lock cylinder type anti-theft lock
By using the locking plate and return spring structure of the lock cylinder type anti-theft lock, the problem of traditional mechanical locks being easily opened by technology is solved, achieving higher anti-theft performance.
Patent Information
- Application Number
- CN202410876866.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2026-01-06
AI Technical Summary
Traditional mechanical locks have a lock cylinder structure that is easily opened by technical means, resulting in poor anti-theft performance.
The lock adopts a lock cylinder type anti-theft lock. Through the combination structure of the locking plate, fixed shaft and lock hole, the return spring makes it impossible for the lock pin to control multiple lock pins at the same time during the cracking process, thus increasing the difficulty of cracking.
This effectively increases the difficulty of cracking the lock cylinder and enhances its anti-theft performance.
Smart Images
Figure CN121273159A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of anti-theft locks, and in particular to a lock cylinder type anti-theft lock. Background Technology
[0002] Traditional mechanical locks have a cylinder with upper and lower rows of pins. To open them technically, a thief first inserts a wire into the cylinder hole and pulls it to rotate it to one side. Then, they insert another wire to move a locking pin, which pushes the pins out of their locking positions. Once all the pins are disengaged, the lock cylinder can be opened. Traditional mechanical locks are easy to break but offer poor security. Summary of the Invention
[0003] To address the aforementioned problems, this invention proposes a lock cylinder-type anti-theft lock.
[0004] The technical solution adopted in this invention is as follows: a lock cylinder type anti-theft lock, including a lock shell, a lock hole on the lock shell, a lock cylinder rotatably connected in the lock hole, a key hole and several locking pin holes on the lock cylinder, the locking pin holes being located on both sides of the central axis of the lock cylinder, and locking pins being provided in the locking pin holes, the lock cylinder having several adjusting grooves and two engaging inclined surfaces, the two engaging inclined surfaces being located on both sides of the central axis of the lock cylinder, the locking pin holes connecting the key hole and the engaging inclined surfaces, a fixed shaft passing through the adjusting groove, a locking plate group being provided in the adjusting groove, the locking plate group being rotatably connected to the fixed shaft, the locking plate group including several staggered locking plates, a return spring being provided between adjacent locking plates, a groove being provided at the end of the locking plate, a positioning shaft being provided in the groove, the positioning shaft being located between the engaging inclined surface and the inner wall of the lock hole.
[0005] Furthermore, the locking piece is provided with a connecting groove, and the bottom part or all of the locking pin is located in the connecting groove.
[0006] Furthermore, the lock cylinder has a shaft hole at its center, which extends through all the adjustment slots, and the fixed shaft is inserted into the shaft hole.
[0007] Furthermore, the rear end of the lock cylinder is connected to a positioning part, the positioning part is provided with a fixing hole that connects to the keyhole, the inner wall of the lockhole is provided with a mating hole, the fixing hole and the mating hole are provided with a positioning lock pin and a positioning flat ball, and a push-out spring is provided between the positioning flat ball and the mating hole.
[0008] Furthermore, the snap-fit bevels are symmetrically distributed on both sides of the central axis of the lock cylinder.
[0009] Furthermore, the locking pin holes are symmetrically arranged on both sides of the central axis of the lock cylinder.
[0010] Furthermore, the adjusting groove is provided with a spring groove, and the reset spring is disposed in the spring groove.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] In this invention, the locking of the lock cylinder and the lock shell is achieved by the contact between the locking plates, the fixed shaft, and the lock hole. A return spring is provided between adjacent locking plates. During the technical cracking process, the lock pins return to their original positions under the action of the return springs after the pressure is removed. The cracker cannot control multiple lock pins at the same time. Compared with traditional mechanical locks, the locking structure of this lock remains in motion and is numerous during the cracking process, which effectively increases the difficulty of cracking. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0014] Figure 1 This is an exploded view of the overall structure of the present invention;
[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention;
[0016] Figure 3 This is a first cross-sectional view of the overall structure of the present invention;
[0017] Figure 4 This is a second cross-sectional view of the overall structure of the present invention;
[0018] Figure 5 This is a schematic diagram of the card slot structure of the present invention;
[0019] Figure 6 This is a schematic diagram of the unlocked state structure of the present invention;
[0020] Figure 7 This is a schematic diagram of the unlocking state structure of the present invention;
[0021] Figure 8 This is a first schematic diagram of the anti-theft state structure of the present invention;
[0022] Figure 9 This is a second schematic diagram of the anti-theft state structure of the present invention;
[0023] Figure 10 This is a schematic diagram of the lock cylinder structure of the present invention;
[0024] The invention reference information is as follows:
[0025] 1. Lock case; 11. Lock hole; 12. Mating hole; 121. Positioning ball; 122. Push-out spring; 2. Lock cylinder; 21. Keyhole; 22. Pin hole; 221. Pin; 23. Positioning part; 231. Fixing hole; 232. Positioning pin; 24. Adjustment groove; 241. Spring groove; 25. Snap-fit bevel; 26. Fixing shaft; 27. Locking piece; 271. Groove; 272. Positioning shaft; 273. Connecting groove; 28. Return spring; 29. Shaft hole;
[0026] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0029] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.
[0030] See Figure 1-3This invention provides a lock cylinder type 2 anti-theft lock, including a lock shell 1, a lock hole 11 on the lock shell 1, a lock cylinder 2 rotatably connected in the lock hole 11, a keyhole 21 and several locking pin holes 22 on the lock cylinder 2, the locking pin holes 22 being located on both sides of the central axis of the lock cylinder 2, and locking pins 221 being provided in the locking pin holes 22, the lock cylinder 2 having several adjusting grooves 24 and two engaging inclined surfaces 25, the two engaging inclined surfaces 25 being located on both sides of the central axis of the lock cylinder 2, and the locking pin holes 22 being connected to the key. The device includes a hole 21 and a snap-fit inclined surface 25. A fixed shaft 26 passes through the adjustment groove 24. A set of snap-fit pieces 27 is provided in the adjustment groove 24. The set of snap-fit pieces 27 is rotatably connected to the fixed shaft 26. The set of snap-fit pieces 27 includes several snap-fit pieces 27 arranged in an alternating manner. A return spring 28 is provided between adjacent snap-fit pieces 27. A groove 271 is provided at the end of each snap-fit piece 27. A positioning shaft 272 is provided in the groove 271. The positioning shaft 272 is located between the snap-fit inclined surface 25 and the inner wall of the lock hole 11.
[0031] The anti-theft principle of this lock is as follows: Figure 6 The image shows the lock in its locked state when no key is inserted. Two staggered locking plates 27 in the adjustment groove 24 open to both sides under the action of the return spring 28. The positioning shaft 272 abuts against the locking inclined surface 25 and the inner wall of the lock hole 11. At this time, regardless of which side the lock cylinder 2 rotates, it will be blocked by the positioning shaft 272, keeping the lock cylinder 2 in a normal locked state. The image shows the lock with the matching key inserted. Lock pins 221 of different lengths move downwards under the action of the key, pushing the locking plates 27 to rotate. The locking plates 27 then push the positioning shaft 272 to the designated position. At this time, the positions of the key, locking pins 221, locking plates 27, lock cylinder 2, and positioning shaft 272 remain relatively fixed, and the positioning shaft 272 does not have a locking effect. The lock cylinder 2 can rotate normally to unlock. Figure 8 To determine the state of this lock when it is technically unlocked, a locksmith must press the lock pin down to its lowest position and then rotate the lock cylinder 2 left and right to test its accurate position. However, the locksmith can only adjust one lock pin 221 at a time. In traditional door locks, the lock pin will not move up or down after adjustment. But in this lock, after the force applied to the lock pin 221 is removed, the return spring 28 will push the locking piece 27 upward, pushing the lock pin 221 back to its initial position. This causes the positioning shaft 272 to abut against the locking bevel 25 and the inner wall of the lock hole 11 again. Moreover, the space in the lock cylinder hole is narrow, making it impossible for the locksmith to position multiple lock pins 221 simultaneously, greatly increasing the difficulty of unlocking this lock. See also Figure 8 , 9When the wrong key is inserted, the teeth on the key may push the longer locking pin 221 to the top, or they may not contact the shorter locking pin 221. In both cases, the positioning shaft 272 will rotate or remain in the contact position. The locking pins 221 of different lengths are arranged on both sides of the lock cylinder 2, so that the above-mentioned contact state occurs on both sides of the lock cylinder 2, thereby locking the lock cylinder 2.
[0032] like Figure 5 As shown, the locking piece 27 is provided with a connecting groove 273. Depending on the downward movement length of the locking pin 221, the bottom end of the locking pin 221 may be partially or completely located in the connecting groove 273. The connecting groove 273 can prevent the locking pin 221 from sliding when it contacts the locking piece 27.
[0033] like Figure 1 As shown, the lock cylinder 2 has a shaft hole 29 at its center, the shaft hole 29 passes through all the adjusting grooves 24, and the fixed shaft 26 is inserted into the shaft hole 29.
[0034] like Figure 4 , Figure 10 As shown, the rear end of the lock cylinder 2 is connected to a positioning part 23. The positioning part 23 has a fixing hole 231 that connects to the keyhole 21. The inner wall of the lock hole 11 has a mating hole 12. The fixing hole 231 and the mating hole 12 contain a positioning lock pin 232 and a positioning flat ball 121. A push-out spring 122 is provided between the positioning flat ball 121 and the mating hole 12. The structural principle of this part is the same as that of a traditional pin tumbler mechanical lock. By combining lock cylinders 2 with different structures, the anti-theft performance of this lock can be improved.
[0035] Preferably, the snap-fit inclined surface 25 and the locking pin hole 22 are symmetrically distributed on both sides of the central axis of the lock cylinder 2.
[0036] like Figure 10 As shown, the adjustment groove 24 is provided with a spring groove 241, and the reset spring 28 is disposed in the spring groove. The spring groove 241 is used to limit the relative position of the reset spring 28.
[0037] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.
Claims
1. A lock cylinder type anti-theft lock, comprising a lock shell, a lock hole on the lock shell, a lock cylinder rotatably connected in the lock hole, a key hole and a plurality of lock pin holes on the lock cylinder, the lock pin holes being located on both sides of the central axis of the lock cylinder, and lock pins being provided in the lock pin holes, characterized in that: The lock core is provided with a plurality of adjusting grooves and two clamping inclined surfaces, the two clamping inclined surfaces are respectively arranged on the two sides of the central axis of the lock core, the lock pin hole is communicated with the key hole and the clamping inclined surface, the adjusting groove is provided with a fixing shaft, the adjusting groove is provided with a clamping piece group, the clamping piece group is rotationally connected to the fixing shaft, the clamping piece group comprises a plurality of staggered clamping pieces, a reset spring is arranged between adjacent clamping pieces, the end of the clamping piece is provided with a groove, the groove is provided with a positioning shaft, and the positioning shaft is located between the clamping inclined surface and the inner wall of the lock hole.
2. A lock cylinder type security lock according to claim 1, characterized in that: The clamping piece is provided with a connecting groove, and the bottom end of the lock pin is partially or entirely located in the connecting groove.
3. A lock cylinder type security lock according to claim 1, characterized in that: The central part of the lock core is provided with a shaft hole, the shaft hole penetrates all the adjusting grooves, and the fixing shaft is inserted into the shaft hole.
4. The lock cylinder type security lock according to claim 1, wherein: The rear end of the lock core is connected with a positioning part, the positioning part is provided with a fixed hole communicated with the key hole, the inner wall of the lock hole is provided with a matching hole, the fixed hole and the matching hole are provided with a positioning lock pin and a positioning flat bead, and a ejection spring is arranged between the positioning flat bead and the matching hole.
5. The lock cylinder type security lock according to claim 1, wherein: The clamping inclined surfaces are symmetrically distributed on the two sides of the central axis of the lock core.
6. A lock cylinder type security lock according to claim 1, characterized in that: The lock pin holes are symmetrically arranged on the two sides of the central axis of the lock core.
7. The lock cylinder type security lock according to claim 1, wherein: The adjusting groove is provided with a spring groove, and the reset spring is arranged in the spring groove.