Anti-theft lock cylinder

Abstract

The invention discloses an anti-theft lock cylinder which comprises a lock shell, a lock container is rotationally arranged in the lock shell, a marble assembly sequentially comprises a sealing bead, a first spring, a flat bead and a marble, a plurality of third marble holes are formed in the lock container, a brake bolt is arranged on the side edge of the lock container, an elastic column is arranged in each third spring hole, and the first spring is arranged in the lock container. The elastic column extends inwards to form a first protruding part, the first protruding part extends into the key hole, a first notch corresponding to the brake bolt is formed in the outer side of the elastic column, a second spring is arranged at the top of the elastic column, and third springs are arranged on the front side and the rear side of the brake bolt. When the lock cylinder and the lock shell are in the locking state, the marble assembly limits rotation, the brake bolt is embedded into the second notch to prevent the lock cylinder and the lock shell from rotating mutually, the difficulty of abnormal unlocking of the lock cylinder is greatly improved, and unlocking cannot be achieved by rotating the lock cylinder.

Description

Technical Field

[0001] This invention relates to the field of lock cylinders, and more particularly to an anti-theft lock cylinder. Background Technology

[0002] Most anti-theft lock cylinders on the market today are not resistant to technical picking and therefore fail to provide any anti-theft protection. Especially in recent years, many electric lock picks have appeared on the market, capable of opening most lock cylinders in just a few seconds. Even many lock cylinders that have passed the Ministry of Public Security's Class B certification are extremely easy to open. Therefore, the applicant has specially developed and designed this structure to meet market needs and protect the lives and property of customers. Summary of the Invention

[0003] In view of the shortcomings of existing technologies, the purpose of this invention is to provide an anti-theft lock cylinder that can solve the problem that existing lock cylinders cannot prevent technical opening and thus fail to play an anti-theft role. Even many lock cylinders that have passed the Ministry of Public Security's Class B certification are extremely easy to open.

[0004] The objective of this invention is achieved through the following technical solution.

[0005] The purpose of this invention is to provide an anti-theft lock cylinder, including a lock shell, a lock cylinder rotatably disposed inside the lock shell, a keyhole for key insertion on the lock cylinder, a plurality of first pin tumbler holes inside the lock shell, a plurality of second pin tumbler holes inside the lock cylinder, a plurality of pin assemblies disposed in the first and second pin tumbler holes, each pin assembly sequentially including a sealing pin, a first spring, a flat pin, and a pin, a plurality of third pin tumbler holes inside the lock cylinder, the third pin tumbler holes being located to one side of the second pin tumbler holes, a brake bolt disposed on the side of the lock cylinder, a spring post disposed in the third spring hole, the spring post extending inward with a first protrusion extending into the keyhole, a first notch corresponding to the brake bolt disposed on the outer side of the spring post, a second spring disposed at the top of the spring post, and third springs disposed on the front and rear sides of the brake bolt, the third springs pushing the brake bolt to move towards the spring post, and a second notch for the brake bolt to be embedded in the inner sidewall of the lock shell.

[0006] The lock cylinder described above has a first groove arranged longitudinally on the front and back sides. A crescent-shaped positioning piece is installed in the first groove. A positioning protrusion is provided in the middle of the crescent-shaped positioning piece. The third spring is fixed on the positioning protrusion.

[0007] The aforementioned third ball bearing holes are arranged in two sets laterally, respectively located on both sides of the second ball bearing hole, and the brake bolt, spring, third spring and crescent positioning piece are symmetrically arranged.

[0008] The second spring and the spring pin are installed from the bottom of the lock cylinder into the third ball pin hole.

[0009] The lock cylinder described above has two first through holes near the keyhole, and anti-drilling pins are installed in the first through holes.

[0010] The first protrusion mentioned above is cylindrical or elliptical.

[0011] Positioning strips are provided on both sides of the keyhole as described above.

[0012] The end of the brake plug embedded in the first notch is V-shaped or trapezoidal, corresponding to the first notch.

[0013] The lock shell described above has a receiving groove in the middle, and a mortise is provided in the receiving groove, which is fitted onto the lock cylinder.

[0014] A drive block is provided at the end of the aforementioned lock cylinder, and a drive protrusion is provided on the drive block. A groove is provided inside the mortise, and the drive protrusion enters into the groove of the mortise to drive the mortise to rotate.

[0015] Compared with the prior art, the present invention has the following advantages: 1) This invention describes an anti-theft lock cylinder, including a lock shell, a lock cylinder rotatably disposed within the lock shell, a keyhole for key insertion on the lock cylinder, a plurality of first pin tumbler holes within the lock shell, a plurality of second pin tumbler holes within the lock cylinder, a plurality of pin assemblies disposed within the first and second pin tumbler holes, each pin assembly sequentially including a sealing pin, a first spring, a flat pin, and a pin, a plurality of third pin tumbler holes within the lock cylinder, the third pin tumbler holes being located to one side of the second pin tumbler holes, a brake bolt disposed on the side of the lock cylinder, and a spring pin disposed within the third spring hole. A first protrusion extends inward into the keyhole. A first notch corresponding to the brake is provided on the outer side of the spring pin. A second spring is provided at the top of the spring pin. Third springs are provided on the front and rear sides of the brake bolt. The third springs push the brake bolt to move towards the spring pin. A second notch for the brake bolt is provided on the inner side wall of the lock shell. When the lock cylinder and lock shell are in the locked state, in addition to the spring pin assembly restricting rotation, the brake bolt is embedded in the second notch to prevent the lock cylinder and lock shell from rotating relative to each other, which greatly increases the difficulty of abnormally opening the lock cylinder, and thus makes it impossible to rotate the lock cylinder to unlock.

[0016] 2) Other advantages of the present invention are described in detail in the embodiments section of the specification. Attached Figure Description

[0017] Figure 1 This is a perspective view of the anti-theft lock cylinder provided in an embodiment of the present invention; Figure 2 This is an exploded view of the anti-theft lock cylinder provided in an embodiment of the present invention; Figure 3 This is an exploded view of the anti-theft lock cylinder provided in an embodiment of the present invention; Figure 4 This is an exploded view of the anti-theft lock cylinder provided in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the anti-theft lock cylinder provided in an embodiment of the present invention; Figure 6 This is a longitudinal sectional view of the anti-theft lock cylinder provided in an embodiment of the present invention; Figure 7 This is a cross-sectional view of the location of the anti-theft lock cylinder pin assembly provided in an embodiment of the present invention; Figure 8 This is a cross-sectional view of the anti-theft lock cylinder brake bolt storage provided in an embodiment of the present invention; Figure 9 This is a cross-sectional view of the anti-theft lock cylinder brake bolt being opened according to an embodiment of the present invention. Detailed Implementation

[0018] The present invention will now be described in further detail through specific embodiments and in conjunction with the accompanying drawings.

[0019] The following detailed description provides various embodiments or examples for carrying out the present invention. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0020] like Figures 1 to 9As shown, this embodiment provides an anti-theft lock cylinder, including a lock shell 1. A lock cylinder 2 is rotatably disposed within the lock shell 1. The lock cylinder 2 has a keyhole 201 for key insertion. The lock shell 1 has several first pin tumbler holes 101, and the lock cylinder 2 has several second pin tumbler holes 202. Several sets of pin assemblies 21 are disposed within the first pin tumbler holes 101 and second pin tumbler holes 202. Each pin assembly 21 sequentially includes a sealing pin 211, a first spring 212, a flat pin 213, and a pin 214. When a correctly matched key is inserted into the keyhole, the teeth on the key will push up the pin 214. When the contact surface between the pin 214 and the flat pin 213... When the contact surfaces of the lock case 1 and the lock cylinder 2 are flush, the key can be turned to unlock the lock. When no key is inserted, the flat ball 213 restricts rotation between the lock case 1 and the lock cylinder 2. It is worth noting that the lock cylinder 2 has several third pin holes 203, located to one side of the second pin holes 202. A brake 22 is located on the side of the lock cylinder 2, moving laterally within it. A spring pin 23 is located within the third spring hole 203, moving downwards within it. The spring pin 23 extends inwards with a first protrusion 231, which extends to the keyhole 2. Inside the keyhole 201, a groove is provided on the side of the key. When the key is inserted into the keyhole, the first protrusion 231 is embedded in the side groove of the key and moves up and down. The outer side of the spring pin 23 is provided with a first notch 232 corresponding to the brake bolt 22. A second spring 24 is provided at the top of the spring pin 23. A third spring 25 is provided on the front and rear sides of the brake bolt 22. The third spring 25 pushes the brake bolt 22 to move towards the spring pin 23. The inner side wall of the lock case 1 is provided with a second notch 102 for the brake bolt 22 to be embedded. When the key is inserted into the keyhole 201, the first protrusion 231 will be embedded in the side groove of the key. The side groove has different heights. When the first notch 232 on the pin 23 is aligned, the third spring 25 pushes the brake bolster 22 into the first notch 232. The brake bolster 22 will then move away from the second notch 102, allowing it to rotate. When the key is removed, the second spring 24 pushes the pin 23 downwards, causing the first notch 232 to shift and the brake bolster 22 to emerge from the second notch 102. This prevents the lock shell 1 and the lock cylinder 2 from rotating relative to each other. When the lock cylinder 2 and the lock shell 1 are locked, in addition to the pin assembly 21 restricting rotation, the brake bolster 22 is embedded in the second notch 102 to prevent the lock cylinder 2 and the lock shell 1 from rotating relative to each other. This greatly increases the difficulty of abnormally opening the lock cylinder, making it impossible to rotate the lock cylinder to unlock it.

[0021] As an optional embodiment, the lock cylinder 2 has a first slot 204 longitudinally arranged on the front and rear sides. A crescent-shaped positioning piece 26 is installed in the first slot 204. A positioning protrusion 261 is provided in the middle of the crescent-shaped positioning piece 26. The third spring 25 is fixed on the positioning protrusion 261. In order to facilitate the installation and positioning of the third spring 25, the brake bolt 22 is first inserted into the lock cylinder 2, and the two ends of the brake bolt 22 are inserted into the third spring 25. Then the crescent-shaped positioning piece 26 is installed on the lock cylinder 2. This facilitates the installation. When the brake bolt 22 leaves the first notch 232, it will push the brake bolt 22 out of the lock cylinder 2.

[0022] As an optional embodiment, two sets of the third pin holes 203 are arranged laterally, respectively located on both sides of the second pin holes 202. The brake bolts 22, spring pins 23, third springs 25 and crescent-shaped positioning plates 26 are symmetrically arranged. In order to improve the anti-theft performance, the brake bolts 22 on both sides of the lock cylinder 2 are used for restriction, and combined with the pin assembly 21, the difficulty of abnormal opening of the lock cylinder is greatly increased.

[0023] As an optional embodiment, the second spring 24 and the spring pin 23 are installed from the bottom of the lock cylinder 2 into the third ball pin hole 203.

[0024] As an optional embodiment, the lock cylinder 2 is provided with two first through holes 205 near the keyhole 201. An anti-drilling pin 27 is provided in the first through hole 205. Since the lock cylinder 2 is made of copper, the material is not hard enough. Therefore, in order to prevent destructive drilling, the anti-drilling pin 27 is installed to prevent drilling damage. In order to achieve the best effect, the anti-drilling pin 27 is made of 65 manganese wire.

[0025] As an optional embodiment, the first protrusion 231 is cylindrical or elliptical. Cylindrical or elliptical shapes are relatively smooth and less likely to jam the key, thus improving smoothness.

[0026] As an optional embodiment, positioning strips 28 are provided on both sides of the keyhole 201 to facilitate the accurate insertion of the key.

[0027] As an optional embodiment, the end of the brake plug 22 embedded in the first notch 232 is V-shaped or trapezoidal, corresponding to the first notch 232. This V-shaped or trapezoidal structure facilitates the insertion of the brake plug 22 and facilitates pushing the brake plug 22 outward when the spring 23 moves up and down.

[0028] As an optional embodiment, a receiving groove 104 is provided in the middle of the lock shell 1, and a latch 3 is provided in the receiving groove 104. The latch 3 rotates to actuate the lock body to open or close the bolt. The latch 3 is fitted onto the lock cylinder 2 and is located in the middle. A driving block 31 is provided at the end of the lock cylinder 2. A driving protrusion 311 is provided on the driving block 31. A groove 312 is provided in the latch 3. The driving protrusion 311 enters the groove 312 of the latch 3 to drive the latch 3 to rotate.

[0029] In existing technologies, lock cylinders cannot prevent technical picking and thus fail to provide anti-theft protection. Even many lock cylinders that have passed the Ministry of Public Security's Class B certification are easily opened. Therefore, this paper proposes an anti-theft lock cylinder that, in addition to the conventional pin tumbler assembly 21 controlling the lock shell 1 and lock cylinder 2 to prevent relative rotation, also includes a third pin tumbler hole 203. This third pin tumbler hole 203 is located to one side of the second pin tumbler hole 202. A brake bolt 22 is located on the side of the lock cylinder 2. A spring pin 23 is located inside the third spring hole 203, and the brake bolt 22 is located on the outer side of the spring pin 23. The corresponding first notch 232, the top of the spring 23 is provided with a second spring 24, and the front and rear sides of the brake bolt 22 are provided with a third spring 25. The third spring 25 pushes the brake bolt 22 to move towards the spring 23. The inner wall of the lock shell 1 is provided with a second notch 102 into which the brake bolt 22 is embedded. In this way, in addition to the ball assembly 21 restricting the rotation, the brake bolt 22 is embedded in the second notch 102 to prevent the lock cylinder 2 and the lock shell 1 from rotating relative to each other, which greatly increases the difficulty of abnormally opening the lock cylinder, and thus makes it impossible to rotate the lock cylinder to unlock.

[0030] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention are equivalent substitutions and are included within the protection scope of the present invention.

Claims

1. An anti-theft lock cylinder, comprising a lock shell (1), wherein a lock cylinder (2) is rotatably disposed within the lock shell (1), the lock cylinder (2) is provided with a keyhole (201) for key insertion, the lock shell (1) is provided with a plurality of first pin holes (101), the lock cylinder (2) is provided with a plurality of second pin holes (202), and a plurality of sets of pin assemblies (21) are provided in the first pin holes (101) and the second pin holes (202), wherein the pin assembly (21) sequentially comprises a sealing bead (211), a first spring (212), a flat bead (213), and a pin (214), characterized in that: The lock cylinder (2) is provided with a plurality of third pin holes (203). The third pin holes (203) are located on one side of the second pin holes (202). The lock cylinder (2) is provided with a brake bolt (22) on its side. The third spring hole (203) is provided with a spring post (23). The spring post (23) extends inward to a first protrusion (231). The first protrusion (231) extends into the keyhole (201). The outer side of the spring post (23) is provided with a first notch (232) corresponding to the brake bolt (22). The top of the spring post (23) is provided with a second spring (24). The front and rear sides of the brake bolt (22) are provided with third springs (25). The third springs (25) push the brake bolt (22) to move towards the spring post (23). The inner wall of the lock shell (1) is provided with a second notch (102) into which the brake bolt (22) is embedded.

2. The anti-theft lock cylinder according to claim 1, characterized in that: The lock cylinder (2) has a first slot (204) arranged longitudinally on the front and back sides. A crescent-shaped positioning piece (26) is installed in the first slot (204). A positioning protrusion (261) is arranged in the middle of the crescent-shaped positioning piece (26). The third spring (25) is fixed on the positioning protrusion (261).

3. The anti-theft lock cylinder according to claim 2, characterized in that: The third ball bearing holes (203) are arranged in two sets laterally, respectively located on both sides of the second ball bearing hole (202). The brake bolt (22), spring (23), third spring (25) and crescent positioning piece (26) are arranged symmetrically.

4. The anti-theft lock cylinder according to claim 3, characterized in that: The second spring (24) and the spring pin (23) are installed from the bottom of the lock cylinder (2) into the third ball pin hole (203).

5. The anti-theft lock cylinder according to claim 1, characterized in that: The lock cylinder (2) has two first through holes (205) near the keyhole (201), and anti-drilling pins (27) are provided in the first through holes (205).

6. The anti-theft lock cylinder according to claim 1, characterized in that: The first protrusion (231) is cylindrical or elliptical.

7. The anti-theft lock cylinder according to claim 1, characterized in that: Positioning strips (28) are provided on both sides inside the keyhole (201).

8. The anti-theft lock cylinder according to claim 1, characterized in that: The end of the brake plug (22) embedded in the first notch (232) is V-shaped or trapezoidal, corresponding to the first notch (232).

9. The anti-theft lock cylinder according to claim 1, characterized in that: The lock shell (1) is provided with a receiving groove (104) in the middle position, and a jack (3) is provided in the receiving groove (104), which is fitted onto the lock cylinder (2).

10. The anti-theft lock cylinder according to claim 9, characterized in that: A drive block (31) is provided at the end of the lock cylinder (2), and a drive protrusion (311) is provided on the drive block (31). A groove (312) is provided inside the nut (3). The drive protrusion (311) enters the groove (312) of the nut (3) to drive the nut (3) to rotate.

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