A theftproof security lock cylinder

Abstract

This invention discloses an anti-theft security lock cylinder, including a lock cylinder with an anti-theft mechanism inside. The anti-theft mechanism is used to improve the anti-theft performance of the lock. When unlocking, when the correct key is inserted, after the key has gone a certain distance, the key teeth will push the upper pin 1 to the correct height. At this time, the annular notch groove of the upper pin 1 is aligned with the locking block. Due to the pressure of the spring force, the locking block will be forced to move into the annular notch groove of the upper pin 1 and embed into the notch groove, thereby linking one side of the locking block and causing the locking block to disengage from the annular locking groove of the upper pin 2. This allows the lower pin of the lock teeth to move up and down. At this time, the key will go a certain distance into the lock cylinder, and the frontmost locking tooth of the key will push the lower pin of the lock teeth to the accurate height. At this time, the upper pin 2 will no longer block the lock cylinder and the lock cylinder. The lock cylinder can then be turned by the key, thereby outputting the unlocking action through the bolt.

Description

Technical Field

[0001] This invention relates to the field of anti-theft devices, specifically an anti-theft security lock cylinder. Background Technology

[0002] Anti-theft locks are a type of lock that enhances security through different lock cylinder principles. The main types include pin tumbler locks, wafer locks, magnetic locks, IC card locks, and fingerprint locks. Their technical specifications cover resistance to drilling, sawing, prying, and other forms of forced entry, as well as standards for mutual opening rates, and are divided into three levels: A, B, and Super B.

[0003] Traditional pin tumbler locks can be unlocked by inserting simple tools such as wire into the lock hole to push up the pins, and even ordinary keys may be accidentally opened, resulting in low security performance. At the same time, existing pin tumbler locks generally have technical unlocking problems and weak anti-theft functions, which cannot meet the needs of high security scenarios. Therefore, it is necessary to improve the existing technology. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-theft security lock cylinder to solve the problem that lock cylinders in the prior art can be easily opened when using a latch and a single hook, thereby greatly enhancing the anti-theft performance of locks.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An anti-theft security lock cylinder includes a lock cylinder with an anti-theft mechanism inside. The anti-theft mechanism is used to improve the anti-theft performance of the lock. The anti-theft mechanism includes a screw threadedly connected inside the lock cylinder, a spring sleeved inside the lock cylinder, an upper pin connected to the lower end of the spring, the lower end of the upper pin being in close contact with a lower pin of a locking block, a screw threadedly connected inside the lock cylinder, a spring sleeved inside the lock cylinder, an upper pin connected to the lower end of the spring, the lower end of the upper pin being in close contact with a lower pin of a locking tooth, an integrated locking block slidably sleeved inside the lock cylinder, and a spring sleeved inside the lock cylinder. The lock cylinder is equipped with an unlocking mechanism for safely opening the lock. The unlocking mechanism includes a lock cylinder inside the lock cylinder, one end of which is connected to a dial, and a key is inserted inside the lock cylinder.

[0006] Preferably, the upper tumbler is sleeved inside the lock cylinder, and the upper tumbler is provided with an annular recessed groove of an integrated locking block.

[0007] Preferably, a second tumbler is fitted inside the lock cylinder.

[0008] Preferably, one end of the spring three is connected to an integrated locking block, and the upper ball two is provided with an annular locking groove of the integrated locking block.

[0009] Preferably, the inner sleeve of the lock cylinder is fitted with a lower tumbler, and the inner sleeve of the lock cylinder is fitted with a lower tumbler of the lock tooth.

[0010] Compared with the prior art, the beneficial effects of the present invention are: This anti-theft security lock cylinder, based on a standard pin tumbler lock, divides the pins into a lower pin tumbler, upper pin 2, and a lower pin tumbler and upper pin 1 with locking blocks. The lower pin tumbler and upper pin 2 have higher precision than the lower pin tumbler and upper pin 1 with locking blocks; the upper pin 2 restricts the cylinder's rotation. The lower pin tumbler and upper pin 1, due to their slightly lower precision, can move freely up and down. Upper pin 1 has an annular notch groove, and upper pin 2 has an annular locking groove. An integrated locking block is located between the annular notch groove and the annular locking groove, and this integrated locking block is connected to a spring 3 that is always in a compressed state. When the lock cylinder deflects in the locked state, the lock cylinder experiences slight movement due to the precision of the lock teeth. Since the upper pin 2 is held in place by an integrated locking block, it cannot be moved. The movement of the integrated locking block is controlled by the upper pin 1. However, because the upper pin 1 has a precision redundancy, it can slide freely. Therefore, the upper pin 1 will not get stuck between the lock cylinder and the lock cylinder like in a conventional pin tumbler lock, thus effectively eliminating the risk of conventional pin tumbler locks being opened by tools and techniques.

[0011] When there is no key or the key does not match, the upper pin 1 is subjected to the elastic force of spring 1, causing the annular notch grooves of each upper pin 1 to be misaligned. The integrated locking block is lifted by the inclined surface of the annular notch groove, and one end of it engages with the annular locking groove of upper pin 2, thereby locking upper pin 2 and preventing the lower pin of the lock teeth from moving upward. At this time, the lock cylinder and the lock cylinder are blocked by upper pin 2, and the lock cylinder cannot rotate, thus being in a locked state.

[0012] When the correct key is inserted, it first travels a short distance, its teeth lifting the upper pin 1 to the correct height, aligning the annular notches of each upper pin 1 with a straight line and engaging with the integrated locking block. Under the pressure of spring 3, the integrated locking block moves into the annular notch and embeds itself there, while one end disengages from the annular locking groove of upper pin 2, releasing upper pin 2 and allowing the lower pins of the lock teeth to move up and down. Subsequently, the key continues to travel a short distance into the lock cylinder, where the frontmost locking tooth lifts the lower pins of the lock teeth to the accurate height. At this point, upper pin 2 no longer obstructs the relative rotation between the lock cylinder and the lock cylinder, allowing the lock cylinder to be rotated by the key, thus driving the bolt to complete the unlocking action.

[0013] After the key is removed, the upper pin 2 is first reset to its initial position by the elastic force of the second spring, so that the annular locking groove of the upper pin 2 aligns with the integrated locking block. The upper pin 1 moves downward under the pressure of the first spring, and the inclined edge of its annular notch pushes up the integrated locking block, so that the integrated locking block re-engages into the annular locking groove of the upper pin 2, locking the upper pin 2 again and restoring the locked state.

[0014] Because the interlocking of the lock cylinder and the lock cylinder is achieved through the second upper pin, and the second upper pin cannot move when locked, while the first upper pin is designed with a precision redundancy space, the first upper pin will not get stuck between the lock cylinder and the lock cylinder. This means that the annular notch of the first upper pin cannot be stuck at the correct height without the correct key, allowing the first upper pin to always press against the integrated locking block, so that one end of the integrated locking block is always stuck in the annular locking groove of the second upper pin. Even if the lock cylinder is slightly moved due to the precision of the lock teeth, the second upper pin cannot be moved because it is locked by the integrated locking block. The movement of the integrated locking block is controlled by the first upper pin as a whole. However, because the first upper pin has a precision redundancy and can slide freely, it will not get stuck between the lock cylinder and the lock cylinder like in a conventional pin tumbler lock, thus restricting the movement of the locking block. The locking block keeps the second upper pin, so the second upper pin will always lock the lock cylinder and the lock cylinder, thereby effectively eliminating the risk of conventional pin tumbler locks being opened by tool techniques. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an enlarged perspective sectional view of the lock cylinder of the present invention; Figure 3 This is an enlarged perspective view of the integrated card block of the present invention; Figure 4 This is an enlarged perspective view of point A in the present invention; Figure 5 This is an enlarged cross-sectional view of the lock cylinder of the present invention; Figure 6 This is an enlarged cross-sectional view of the upper ball of the present invention; Figure 7 This is an enlarged cross-sectional view of the upper ball of the present invention.

[0016] In the diagram: 1. Lock cylinder, 11. Screw 1, 12. Spring 1, 13. Upper pin 1, 14. Lower pin of locking block, 15. Screw 2, 16. Spring 2, 17. Upper pin 2, 18. Lower pin of lock tooth, 19. Integrated locking block, 110. Spring 3, 111. Annular notch groove, 112. Annular locking slot, 2. Lock cylinder, 21. Dial wheel, 22. Key. Detailed Implementation

[0017] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The diagram illustrates an anti-theft security lock cylinder, comprising a lock cylinder 1. The lock cylinder 1 has an internal anti-theft mechanism to enhance its anti-theft performance. This mechanism includes screws 11 threaded inside the lock cylinder 1, springs 12 sleeved inside the lock cylinder 1, upper pins 13 connected to the lower ends of springs 12, and lower pins 13 abutting against lower pins 14 of a locking block. Screws 15 are also threaded inside the lock cylinder 1. Springs 16 are sleeved inside the lock cylinder 1, upper pins 17 connected to the lower ends of springs 16, and lower pins 18 abutting against lower pins 18 of the locking teeth. A locking block 19 is slidably sleeved inside the lock cylinder 1. Springs 110 are also sleeved inside the lock cylinder 1. The upper pins 13 form a group; in this embodiment, four are provided. It should be noted that the number of upper pins 13 and lower pins 14 corresponds. There is one upper pin 17 and one lower pin 18 of the locking teeth.

[0019] The lock cylinder 1 is equipped with an unlocking mechanism for safely opening the lock. The unlocking mechanism includes a lock cylinder 2 inside the lock cylinder 1. One end of the lock cylinder 2 is connected to a dial 21, and a key 22 is inserted into the lock cylinder 2.

[0020] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The upper pin 13 is sleeved inside the lock cylinder 1, and the upper pin 13 is provided with an annular notch groove 111 of the integrated locking block 19; In this configuration, based on a standard pin tumbler lock, the pins are divided into a lower pin 18, an upper pin 2 17, a lower pin 14, and an upper pin 13. The upper pin 2 17 has higher precision than the upper pin 13. The lock cylinder 2 is restricted from rotating by the upper pin 2 17, while the upper pin 13, due to its slightly lower precision, can move freely up and down. The upper pin 2 17 is provided with an annular locking groove 112, and the upper pin 13 is provided with an annular recessed groove 111. An integrated locking block 19 is provided between the annular recessed groove 111 and the annular locking groove 112. The integrated locking block 19 is provided with a spring 3 110, and the spring 3 110 is in a compressed state.

[0021] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 The second pin 17 is sleeved inside the lock cylinder 1; In this configuration, when the lower pin 14 is in the keyless state or the key 22 is mismatched, the upper pin 13 is subjected to the elastic force of the spring 12, causing the annular notch groove 111 of the upper pin 13 to be misaligned. Due to the misalignment of the annular notch groove 111, the integrated locking block 19 is lifted by the inclined surface of the annular notch groove 111, overcoming the elastic force of the spring 3 110, and causing one end of it to engage in the annular locking groove 112 of the upper pin 2 17, thereby locking the upper pin 2 17. The lower pin 18 of the locking teeth cannot move upward. At this time, the lock cylinder 2 and the lock core 1 are blocked by the upper pin 2 17, the lock cylinder 2 cannot rotate, and the lock cylinder 2 is in a locked state.

[0022] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 One end of the spring 3 110 is connected to the integrated locking block 19, and the upper ball 2 17 is provided with an annular locking groove 112 of the integrated locking block 19; With this setup, when unlocking, when we insert the correct key 22, which has flat-headed teeth, after the key 22 has entered a certain distance, the teeth will push the upper pin 13 to the correct height. At this time, the annular groove 111 of the upper pin 13 is aligned with the integrated locking block 19. Due to the pressure of the spring 3 110, the integrated locking block 19 will be forced to move into the annular groove 111 of the upper pin 13 and embed into the annular groove 111. This will cause the integrated locking block 19 to disengage from the annular locking groove 112 of the upper pin 2 17, allowing the lower pin 18 of the lock teeth to move up and down. At this time, the key 22 will enter the lock cylinder 2 a certain distance, and the frontmost locking tooth of the key 22 will push the lower pin 18 of the lock teeth to the accurate height. At this time, the upper pin 2 17 will no longer block the lock cylinder 2 and the lock cylinder 1. The lock cylinder 2 can then be rotated by the key 22, thereby outputting the unlocking action through the bolt. After the key 22 is pulled out, the upper pin 2 17 is first reset to its initial state by the elastic force of the spring 2 16. Then the upper pin 13 is pressed by the spring 12 and will move downward. The inclined edge of the annular notch groove 111 will push the integrated locking block 19 up, so that the other end of the integrated locking block 19 is locked into the annular locking groove 112 of the upper pin 2 17 and locks the upper pin 2 17.

[0023] Please see Figure 2 , Figure 3 and Figure 5 The inner sleeve of the lock cylinder 2 is connected to the lower pin 14 of the locking block, and the inner sleeve of the lock cylinder 2 is connected to the lower pin 18 of the locking tooth; In this configuration, since the interlocking between the lock cylinder 2 and the lock cylinder 1 is achieved through the upper pin 2 17, and the upper pin 2 17 cannot move when locked, while the upper pin 13 is designed with a precision redundancy space, even if the lock cylinder deflects in the locked state, the upper pin 13 will not get stuck between the lock cylinder 2 and the lock cylinder 1. This means that the upper pin 14's annular notch groove 111 cannot be stuck at the correct height without the correct key, allowing the upper pin 13 to keep pressing against the integrated locking block 19, so that one end of the integrated locking block 19 is always stuck in the annular locking groove 112 of the upper pin 2 17. Even if the lock cylinder experiences slight movement due to the precision of the locking teeth, the upper pin 2 17 is held in place by the integrated locking block 19 and cannot be moved. The movement of the integrated locking block 19 is controlled by the upper pin 1 13 as a whole. However, because the upper pin 1 13 has precision redundancy and can slide freely, it will not get stuck between the lock cylinder and the lock cylinder like a conventional pin tumbler lock, thus restricting the movement of the integrated locking block 19. The integrated locking block 19 will keep the upper pin 2 17 locked, so that the upper pin 2 17 will keep the lock cylinder 2 and the lock cylinder 1 locked, thereby effectively eliminating the risk of conventional pin tumbler locks being opened by tool techniques.

[0024] The working principle of this embodiment is as follows: Based on a standard pin tumbler lock, this lock cylinder divides the pins into a lower pin 18, an upper pin 2 17, and a lower pin 14 and an upper pin 13. The lower pin 18 and upper pin 2 17 have higher precision than the lower pin 14 and upper pin 13. The lock cylinder 2 is restricted from rotating by the upper pin 2 17; the upper pin 13, due to its slightly lower precision, can move freely up and down. The upper pin 13 has an annular notch groove 111, and the upper pin 2 17 has an annular locking groove 112. An integrated locking block 19 is provided between the annular notch groove 111 and the annular locking groove 112, and the integrated locking block 19 is connected to a spring 3 110 that is always in a compressed state.

[0025] Locked State: When there is no key 22 or the key 22 is mismatched, the upper pin 13 is subjected to the elastic force of spring 12, causing the annular notch grooves 111 of each upper pin 13 to be misaligned. Due to the misalignment of the annular notch grooves 111, the integrated locking block 19 is pushed up by the inclined surface of the annular notch groove 111, overcoming the elastic force of spring 110, and causing one end of it to engage in the annular locking groove 112 of the upper pin 17, thereby locking the upper pin 17. At this time, the lower pin 18 of the lock teeth cannot move upward, the lock cylinder 2 and the lock core 1 are blocked by the upper pin 17, the lock cylinder 2 cannot rotate, and the lock is in the locked state.

[0026] Unlocking process: When the correct key 22 is inserted, it first advances a short distance, its teeth lifting the upper pins 13 to the correct height, aligning the annular recessed grooves 111 of each upper pin 13 into a straight line and matching the contour of the integrated locking block 19. At this time, the integrated locking block 19 moves into the annular recessed groove 111 under the elastic pressure of the spring 3 110 and embeds itself therein, while its other end disengages from the annular locking groove 112 of the upper pin 2 17, thereby releasing the upper pin 2 17 and allowing the lower pin 18 of the lock teeth to move up and down. Subsequently, the key 22 continues to advance a short distance into the lock cylinder 2, where the frontmost locking tooth of the key 22 lifts the lower pin 18 of the lock teeth to the accurate height. At this time, the upper pin 2 17 no longer obstructs the relative rotation between the lock cylinder 2 and the lock core 1, allowing the lock cylinder 2 to be rotated by the key 22, thereby driving the dial 21 and the bolt to complete the unlocking action.

[0027] Remove the key: After the key 22 is removed, the upper pin 2 17 is first reset to the initial position by the elastic force of the spring 2 16. The upper pin 13 moves downward under the pressure of the spring 12. The inclined edge of its annular notch groove 111 lifts the integrated locking block 19, so that the integrated locking block 19 is locked into the annular locking groove 112 of the upper pin 2 17 again, locking the upper pin 2 17 again and restoring the locked state.

[0028] Since the interlocking between the lock cylinder 2 and the lock core 1 is achieved through the upper pin 2 17, and the upper pin 2 17 cannot move when locked, while the upper pin 13 is designed with a precision redundancy space, the upper pin 13 will not get stuck between the lock cylinder 2 and the lock core 1. This means that the annular notch 111 of the upper pin 13 cannot be stuck at the correct height without the correct key, so that the upper pin 13 can always press against the integrated locking block 19, so that one end of the integrated locking block 19 is always stuck in the annular locking groove 112 of the upper pin 2 17. Even if the lock cylinder 2 is slightly moved due to the precision of the lock teeth, the upper pin 2 17 is held in place by the integrated locking block 19 and cannot be moved. The movement of the integrated locking block 19 is controlled by the upper pin 1 13 as a whole. However, because the upper pin 1 13 has a precision redundancy and can slide freely, it will not get stuck between the lock cylinder 2 and the lock core 1 like a conventional pin tumbler lock, thus restricting the movement of the integrated locking block 19. The integrated locking block 19 will keep the upper pin 2 17 locked, so that the upper pin 2 17 will keep the lock cylinder 2 and the lock core 1 locked, thereby effectively eliminating the risk of conventional pin tumbler locks being opened by tool techniques.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A theft-proof security lock cylinder, characterized in that: The lock includes a lock cylinder (1), which has an anti-theft mechanism inside. The anti-theft mechanism is used to improve the anti-theft performance of the lock. The anti-theft mechanism includes a screw (11) that is threaded inside the lock cylinder (1), a spring (12) that is sleeved inside the lock cylinder (1), an upper pin (13) that is connected to the lower end of the spring (12), and the lower end of the upper pin (13) that is close to the lower pin (14) of the locking block; a screw (15) that is threaded inside the lock cylinder (1), a spring (16) that is sleeved inside the lock cylinder (1), an upper pin (17) that is connected to the lower end of the spring (16), and the lower end of the upper pin (17) that is close to the lower pin (18) of the locking tooth; an integrated locking block (19) that is slidably sleeved inside the lock cylinder (1); and a spring (110) that is sleeved inside the lock cylinder (1). The lock cylinder (1) is provided with an unlocking mechanism inside. The unlocking mechanism is used to safely open the lock. The unlocking mechanism includes a lock cylinder (2) provided inside the lock cylinder (1). One end of the lock cylinder (2) is connected to a dial (21). A key (22) is inserted inside the lock cylinder (2).

2. The anti-theft security lock cylinder according to claim 1, characterized in that: The lock cylinder (1) is fitted with an upper pin 1 (13), and the upper pin 1 (13) is provided with an annular notch groove (111) of an integrated locking block (19).

3. The anti-theft security lock cylinder according to claim 1, characterized in that: The lock cylinder (1) is fitted with a second tumbler (17).

4. The anti-theft security lock cylinder according to claim 1, characterized in that: One end of the spring three (110) is connected to the integrated locking block (19), and the upper ball two (17) is provided with an annular locking groove (112) of the integrated locking block (19).

5. A theft-proof security lock cylinder according to claim 1, characterized in that: The inner sleeve of the lock cylinder (2) is connected to the lower tumbler (14), and the inner sleeve of the lock cylinder (2) is connected to the lower tumbler (18).

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