A double-security anti-theft lock

Abstract

This invention discloses a double-security anti-theft lock, comprising a throttle assembly, a lock shell, a lock body, and a lock cylinder. The throttle assembly includes a sealing plate, a throttle shaft, a transmission cylinder, a pin tumbler baffle, a lifting ramp ring, and an advance / retreat wedge ring. A key ejection device is installed inside the lock body. The lock cylinder is located inside the lock body. The two transmission cylinders at the rear end of the throttle assembly are connected to the grooves of the two transmission cylinders on the front end of the lock cylinder disc. The lock shell is connected to the throttle assembly and the front end of the lock body. This invention ensures that the lock cylinder is not exposed and the pins are not exposed in the keyhole, effectively preventing technical opening and completely solving the fatal flaw of current mechanical anti-theft locks where the pins are exposed in the keyhole, allowing for direct manipulation and technical opening.

Description

Technical Field

[0001] This invention relates to the field of lock technology, and in particular to an anti-theft lock with dual anti-theft functions. Background Technology

[0002] Currently, there are two types of security locks: mechanical locks and electronic locks. Mechanical locks can be further divided into ordinary locks and combination locks, while electronic locks include fingerprint locks, combination locks, card locks, and QR code locks. Because electronic components are prone to failure, electronic locks are almost always equipped with mechanical locks as a precaution; therefore, electronic locks generally exist independently of mechanical locks. However, mechanical combination locks are susceptible to probability, signs of use, and auditory interference, and can be easily opened technically. Therefore, many manufacturers have focused on upgrading the precision of mechanical locks to B, C, or even D levels to improve their anti-theft capabilities. However, embarrassingly, no matter how high the upgrade or precision, they can still be opened without a key, rendering the lock ineffective and useless. In this technological battle between offense and defense, the security lock, as the defender, has long been at a disadvantage. The reason for this is that the lock cylinder is directly exposed, while the pins are exposed inside the keyhole. A person can directly move the pins and take full advantage of the gap between the lock body and the lock cylinder, as well as the tiny gap between the pins and the pin holes, to quickly unlock the lock using methods such as "misalignment" or "impact." Therefore, these defects are extremely fatal for mechanical anti-theft locks. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the existing technology by providing a double-security anti-theft lock, in which the lock cylinder is not exposed and the pins are not exposed in the keyhole, effectively preventing technical opening.

[0004] The technical solution adopted by the present invention to achieve the above objectives is as follows: a double-security anti-theft lock, comprising a throttle assembly, a lock shell, a lock body, and a lock cylinder. The throttle assembly includes a sealing plate, a throttle shaft, a transmission cylinder, a pin tumbler baffle, a lifting ramp ring, and a forward / backward wedge ring. The sealing plate is a circular plate. The throttle shaft extends forward from the center of the front surface of the sealing plate, and the rear surface of the sealing plate extends backward to form two transmission cylinders. The lifting ramp ring extends backward from the circumference of the rear surface of the sealing plate to form an arc-shaped baffle. The forward / backward wedge ring extends backward from the periphery of the lifting ramp ring of the sealing plate and protrudes from the arc-shaped baffle of the lifting ramp ring. The pin tumbler baffle is an arc-shaped baffle formed by extending backward from the rear surface of the sealing plate, and the pin tumbler baffle is located circumferentially inside the lifting ramp ring. The sealing plate of the throttle assembly also has a fan-shaped key window that penetrates the front and rear surfaces. The lock cylinder is located inside the lock body. The rear transmission cylinder of the throttle assembly is connected to the front end of the lock cylinder. The lock shell is connected to the throttle assembly and the front end of the lock body.

[0005] A further technical solution of the present invention is as follows: the lock case includes a circular plate-shaped lock case body and an annular lock case retaining wall extending rearward from the rear surface of the lock case body. The inner diameter of the lock case retaining wall is equal to the outer diameter of the forward and backward wedge ring of the throttle assembly. The lock case body has a lock case center hole in the middle that penetrates the front and rear surfaces of the lock case body. The lock case body also has a lock case key hole that penetrates the front and rear surfaces of the lock case body. The lock case is connected to the front end of the throttle assembly. The lock case body covers the front end face of the sealing plate of the throttle assembly. The throttle shaft of the throttle assembly passes through the lock case center hole and protrudes from the front end face of the lock case body. The lock case retaining wall covers the outside of the forward and backward wedge ring of the throttle assembly. The rear end face of the lock case retaining wall abuts against the front end face of the lock body.

[0006] A further technical solution of the present invention is as follows: the lock body is provided with a lock cylinder hole in the middle, and an annular baffle cavity extending backward from the front end of the lock body is provided around the lock cylinder hole. A row of lock body pin holes penetrating the lock cylinder hole is provided on one side wall of the lock cylinder hole. The front end of the lock body is provided with a lock body key hole extending backward and penetrating the baffle cavity. The rear end of the lock body key hole is provided with a key ejection device that can eject the key out of the lock body key hole.

[0007] A further technical solution of the present invention is: the lock shell is connected to the front end of the lock body, and when the keyhole of the lock shell corresponds to the keyhole of the lock body, the lock shell and the lock body are welded into an integral structure.

[0008] A further technical solution of the present invention is as follows: the key ejection device includes a push-slide groove, a guide cylinder, a push-block, and a push-spring. The push-slide groove extends forward from the rear end of the lock body and communicates with the keyhole of the lock body. The guide cylinder is located in the push-slide groove, and the front end of the guide cylinder is connected to the front wall of the lock body to form an integral structure. The push-block is provided with a through hole that cooperates with the guide cylinder. The push-block is sleeved on the outer surface of the guide cylinder near the rear end. The push-spring is sleeved on the surface of the guide cylinder, and the front end of the push-spring is connected to the lock body at the root of the guide cylinder. The rear end of the push-spring is connected to the front surface of the push-block. The push-block extends into the keyhole of the lock body. Under the action of the restoring force of the push-spring, the push-block can eject the key from the keyhole of the lock body.

[0009] A further technical solution of the present invention is as follows: the lock cylinder includes a cylindrical lock cylinder body and a lock cylinder turntable connected to the front end of the lock cylinder body. A row of lock cylinder pin holes corresponding one-to-one with the positions of the lock body pin holes are provided on one side of the lock cylinder body. The outer diameter of the lock cylinder body is equal to the inner diameter of the lock cylinder hole of the lock body. The front end face of the lock cylinder turntable is provided with two oppositely arranged transmission cylindrical grooves. When the lock cylinder body of the lock cylinder is set in the lock cylinder hole of the lock body, each set of corresponding lock cylinder pin holes and lock body pin holes is provided with pins and pin springs respectively. The front end face of the lock cylinder turntable is in contact with the rear end face of the throttle assembly sealing plate. The two transmission cylinders at the rear end of the throttle assembly are respectively positioned in the two transmission cylindrical grooves of the lock cylinder turntable. The pin baffle of the throttle assembly is set in the baffle cavity of the lock body. When the throttle shaft of the throttle assembly is rotated, the pin baffle can rotate in the baffle cavity of the lock body.

[0010] A further technical solution of the present invention is that the diameter of the ball is greater than or equal to the diameter of the transmission cylinder connected to the rear end face of the throttle assembly sealing plate.

[0011] A further technical solution of the present invention is: the rising and lowering slope ring is provided with a slanted groove that can position the key handle, the outer side of the slanted groove extends to the inner side of the advancing and retreating wedge ring, and the inner wall of the advancing and retreating wedge ring near the outer side of the slanted groove is partially recessed to form an advancing and retreating wedge that can be inserted into the key notch on the lower side of the key handle to push the key to move, and the ball baffle is located inside the advancing and retreating wedge.

[0012] A further technical solution of the present invention is: the throttle shaft is provided with a screw hole that penetrates the center of the throttle shaft, the throttle shaft is fitted with a throttle handle, the throttle handle is provided with a hole that is opposite to the screw hole of the throttle shaft, and the screw passes through the hole of the throttle handle and enters the screw hole to fix the throttle handle outside the throttle shaft.

[0013] The double-insurance anti-theft lock of the present invention has the following beneficial effects: 1. This invention provides a rotary handle assembly in front of the lock cylinder, which includes a sealing plate and a pin baffle. The lock body has an annular baffle cavity outside the lock cylinder hole that can accommodate the pin baffle. The sealing plate protects the lock cylinder, and the pin baffle blocks the pins, meaning the lock cylinder is not exposed and the pins are not exposed in the keyhole. The pin baffle and sealing plate alternately protect the pins from being directly turned, making it impossible to open the lock using the "misalignment" method. 2. The lock cylinder of this invention is not exposed and cannot be opened technically by "impact". 3. The diameter of the pin of the present invention is greater than or equal to the diameter of the sealing plate cylinder. Under the condition of the same material, it can effectively prevent the pin from being broken and the lock opened by forcibly twisting the handle assembly, and can truly achieve the purpose of double insurance anti-theft.

[0014] The following description, in conjunction with the accompanying drawings and embodiments, further illustrates a double-security anti-theft lock of the present invention. Attached Figure Description

[0015] Figure 1 This is a three-dimensional exploded view of a double-insurance anti-theft lock according to the present invention; Figure 2 It is a 3D diagram of the throttle assembly; Figure 3 yes Figure 2 Another perspective view of the throttle assembly shown; Figure 4 yes Figure 2 Another perspective view of the throttle assembly shown; Figure 5 It is a 3D view of the lock case; Figure 6 yes Figure 5 Another view of the lock case shown; Figure 7 It is a 3D view of the lock body; Figure 8 yes Figure 7 Another perspective view of the lock body shown; Figure 9 yes Figure 7 Another perspective view of the lock body shown; Figure 10 It is a 3D diagram of the lock cylinder; Figure 11 It's a 3D diagram of the throttle handle; Figure 12 It is a 3D view of the jacking block; Figure 13 It is a 3D image of a key; Figure 14 This is an assembly perspective view of a double-security anti-theft lock according to the present invention; Figure 15 yes Figure 14 The image shown is a three-dimensional view of a double-security anti-theft lock from another perspective. Figure 16 yes Figure 14 The image shows a front view of a double-security anti-theft lock; Figure 17 yes Figure 16 A cross-sectional view in the ff direction; Figure 18 yes Figure 16 sectional view in the dd direction; Figure 19 yes Figure 16 A sectional view in the cc direction (without the key inserted); Figure 20 yes Figure 16 A sectional view in the cc direction (key inserted, but not fully inserted); Figure 21 yes Figure 16 A cross-sectional view in the cc direction (key inserted, key in place, pin tumbler not rotated); Figure 22 yes Figure 16 cc-direction sectional view (in) Figure 21 Based on this, rotate the ball baffle; Figure 23 yes Figure 16 cc-direction sectional view (in) Figure 22 Based on this, push the key to unlock; Reference numerals: 1-Thrust, 2-Screw, 3-Lock case, 4-Thrust assembly, 5-Lock body, 6-Lock cylinder, 7-Push block, 8-Push spring, 9-Tumbler spring, 10-Tumbler, 11-Key, 12-Sealing plate, 13-Fan-shaped key window, 14-Thrust shaft, 15-Screw hole, 16-Drive cylinder, 17-Advance / retractable wedge, 18-Tumbler baffle, 19-Angled groove, 20-Advance / retractable wedge ring, 21-Lifting ramp ring 22-Lock case body, 23-Lock case center hole, 24-Lock case keyhole, 25-Lock case retainer, 26-Lock cylinder hole, 27-Baffle cavity, 28-Lock body pin hole, 29-Lock body keyhole, 30-Mounting hole, 31-Push-up slide groove, 32-Guide cylinder, 33-Lock cylinder body, 34-Lock cylinder pin hole, 35-Transmission cylinder groove, 36-Lock cylinder turntable, 37-Through hole, 38-Key handle, 39-Key notch. Detailed Implementation

[0016] like Figure 1 As shown, the present invention provides a double-security anti-theft lock, comprising a rotary handle assembly 4, a lock shell 3, a lock body 5, a lock cylinder 6, and a rotary handle 1. The lock cylinder 6 is disposed in the lock body 5, the rotary handle assembly 4 is connected to the front end of the lock cylinder 6 and the lock body 5, and the lock shell 3 is connected to the rotary handle assembly 4 and the front end of the lock body 5. Figure 1 The direction indicated by the middle arrow F is forward.

[0017] like Figures 2 to 4As shown, the throttle assembly 4 includes a sealing plate 12, a throttle shaft 14, a transmission cylinder 16, a pin tumbler baffle 18, a lifting ramp ring 21, and a forward / backward wedge ring 20. The sealing plate 12 is a circular plate that covers the front of the lock body 5 and the lock cylinder 6 during assembly. The throttle shaft 14 extends forward from the center of the front end surface of the sealing plate 12 and is integrally connected to the front end of the sealing plate 12 for rotating the throttle assembly 4. The throttle shaft 14 has a screw hole 15 penetrating its center. During assembly, the throttle 1 is fitted with a throttle handle 1, which has a hole corresponding to the screw hole 15 on the throttle shaft 14. A screw 2 passes through the hole in the throttle handle 1 and enters the screw hole 15 to fix the throttle handle 1 outside the throttle shaft 14. The rear end surface of the sealing plate 12 extends backward to form two transmission cylinders 16, which are symmetrical about the center of the sealing plate 12. The lifting ramp ring 21 extends rearward from the circumference of the rear end surface of the sealing plate 12 to form an arc-shaped baffle. The advancing and retreating wedge ring 20 extends rearward from the outer periphery of the lifting ramp ring 21 of the sealing plate 12 and protrudes from the arc-shaped baffle of the lifting ramp ring 21. The lifting ramp ring 21 and the advancing and retreating wedge ring 20 are integrally connected to the baffle on the outer side and rear end of the sealing plate 12. The ball baffle 18 is an arc-shaped baffle that extends rearward from the rear end surface of the sealing plate 12, and the ball baffle 18 is located circumferentially inside the lifting ramp ring 21. The center of the ball baffle 18, the lifting ramp ring 21, and the advancing and retreating wedge ring 20 is the same as the center of the sealing plate 12. The sealing plate 12 of the throttle assembly 4 is also provided with a fan-shaped key window 13 that penetrates the front and rear end faces. The center of the fan-shaped key window 13 is also the same as the center of the sealing plate 12. The center of the sealing plate 12 is on the same straight line as the center of the lock cylinder hole 26 of the lock body 5, the center of the lock cylinder body 33 of the lock cylinder 6, and the center of the lock shell center hole 23.

[0018] like Figure 3 , 4 As shown, a slanted groove 19 for positioning the key handle 38 is provided in the recess of the lifting ramp ring 21. The outer side of the slanted groove 19 extends to the inner side of the advance and retreat wedge ring 20. The slanted groove 19 is formed by an inclined cut at one point of the lifting ramp ring 21. The left and right side walls of the inclined cut at the point of the lifting ramp ring 21 form the slanted groove 19. The width of the slanted groove 19 is approximately equal to the thickness of the key handle 38. The slanted groove 19 can position the key handle 38 and is a key lifting and lowering limit device. The side walls of the slanted groove 19 can hold the key in place. Near the outer side of the slanted groove 19, a radially outward recess is formed on the inner wall of the advance and retreat wedge ring 20 to form an advance and retreat wedge 17 that can be inserted into the key notch 39 on the lower side of the key handle 38 to push the key 11 to move. The advance and retreat wedge 17 is a triangular shape with one pointed end. The tumbler baffle 18 is located radially inside the advance and retreat wedge 17. Rotating the throttle shaft 14 and advancing / retracting the wedge 17 can press the key notch 39 on the lower side of the key handle 38, causing the key 11 to move inward or outward.

[0019] like Figure 5 , 6As shown, the lock case 3 includes a circular plate-shaped lock case body 22 and an annular lock case retaining wall 25 extending rearward from the rear surface of the lock case body 22. The inner diameter of the lock case retaining wall 25 is equal to the outer diameter of the forward and backward wedge ring 20 of the throttle assembly 4. A lock case center hole 23 penetrating the front and rear surfaces of the lock case body 22 is provided in the middle of the lock case body 22. A lock case keyhole 24 penetrating the front and rear surfaces of the lock case body 22 is also provided on one side of the lock case center hole 23. For assembly, refer to... Figures 14 to 23 As shown, the lock case 3 is connected to the front end of the throttle assembly 4. The lock case body 22 covers the front end face of the sealing plate 12 of the throttle assembly 4. The throttle shaft 14 of the throttle assembly 4 passes through the lock case center hole 23 and protrudes from the front end face of the lock case body 22. The lock case retainer 25 covers the outside of the forward and backward wedge ring 20 of the throttle assembly 4. The rear end face of the lock case retainer 25 abuts against the front end face of the lock body 5.

[0020] like Figures 7 to 9 As shown, the lock body 5 has a lock cylinder hole 26 in the middle. Around the lock cylinder hole 26, there is an annular baffle cavity 27 extending rearward from the front end of the lock body 5. The rear end of the baffle cavity 27 does not penetrate the rear end face of the lock body 5, and the center of the baffle cavity 27 coincides with the center of the lock cylinder hole 26. A row of lock body pin holes 28 penetrating the lock cylinder hole 26 is provided on one side wall of the lock cylinder hole 26. The front end face of the lock body 5 has a lock body keyhole 29 extending rearward and penetrating the baffle cavity 27. The rear end of the lock body keyhole 29 has a key ejection device that ejects the key 11 out of the lock body keyhole 29. Figure 8 , 9 and Figure 15 , 16 As shown in Figure 17, the key ejection device includes a push-out groove 31, a guide cylinder 32, a push-out block 7, and a push-out spring 8. The push-out groove 31 extends forward from the rear end of the lock body 5 and passes through the keyhole 29 of the lock body. The push-out groove 31 does not penetrate the front end of the lock body 5. When viewed from the rear end to the front, the push-out groove 31 is an H-shaped cavity. The guide cylinder 32 is located in the push-out groove 31. The front end of the guide cylinder 32 is integrated with the front wall of the lock body 5. The push-out block 7 has a through hole 37 that mates with the guide cylinder 32. The push-out block 7 is an H-shaped metal sheet. The push-out block 7 is fitted onto the outer surface of the guide cylinder 32 near the rear end through the through hole 37. One side of the push-out block 7 extends into the keyhole 29 of the lock body. A push spring 8 is fitted onto the surface of the guide cylinder 32, with its front end connected to the lock body 5 at the base of the guide cylinder 32. The rear end of the push spring 8 is connected to the front surface of the push block 7. Since the push block 7 extends into the lock body keyhole 29, under the restoring force of the push spring 8, the push block 7 can eject the key 11 from the lock body keyhole 29. Mounting holes 30 are provided on opposite sides of the rear end face of the lock body 5 for fixing the lock body 5 to the wall.

[0021] like Figure 10 and Figure 16 , 18As shown in Figure 19, the lock cylinder 6 includes a cylindrical lock cylinder body 33 and a lock cylinder turntable 36 connected to the front end of the lock cylinder body 33. A row of lock cylinder pin holes 34, corresponding one-to-one with the positions of the lock body pin holes 28, is provided on one side of the lock cylinder body 33. The outer diameter of the lock cylinder body 33 is equal to the inner diameter of the lock cylinder hole 26 of the lock body 5. The front end face of the lock cylinder turntable 36 has two opposing transmission cylindrical grooves 35. When the lock cylinder body 33 of the lock cylinder 6 is placed in the lock cylinder hole 26 of the lock body 5, each corresponding set of lock cylinder pin holes 34 and lock body pin holes 28 is provided with a pin 10 and a pin spring 9, respectively. The diameter of the pin 10 is greater than or equal to the diameter of the two transmission cylinders 16 connected to the rear end face of the sealing plate 12 of the throttle assembly 4, which prevents the pin 10 from being broken and the lock opened by forcibly twisting the throttle outside the throttle shaft 14. The lock cylinder 6 is located inside the lock body 5. The rear transmission cylinder 16 of the throttle assembly 4 is connected to the front end of the lock cylinder 6. The front end face of the lock cylinder turntable 36 is in contact with the rear end face of the sealing plate 12 of the throttle assembly 4. The two transmission cylinders 16 at the rear end of the throttle assembly 4 are respectively positioned in the two transmission cylinder grooves 35 of the lock cylinder turntable 36. The pin baffle 18 of the throttle assembly 4 is located in the baffle cavity 27 of the lock body 5. When the throttle shaft 14 of the throttle assembly 4 is rotated, the pin baffle 18 can rotate in the baffle cavity 27 of the lock body 5.

[0022] During assembly, see Figures 14 to 19 As shown, the lock cylinder 6 is located in the lock body 5, and each set of corresponding lock cylinder pin holes 34 and lock body pin holes 28 is provided with pins and pin springs 9 respectively. The throttle assembly 4 is connected to the front end of the lock cylinder 6 and the lock body 5. The sealing plate 12 of the throttle assembly 4 covers the front end of the lock cylinder turntable 36. The two transmission cylinders 16 of the throttle assembly 4 are respectively matched with the two transmission cylinder grooves 35 of the lock cylinder turntable 36. The pin baffle 18 of the throttle assembly 4 is set in the baffle cavity 27 of the lock body 5. The lock shell 3 is connected to the throttle assembly 4 and the front end of the lock body 5. When the lock shell keyhole 24 corresponds to the lock body keyhole 29, the lock shell 3 and the lock body 5 are welded into an integral structure. The throttle shaft 14 of the throttle assembly 4 protrudes from the center hole 23 of the lock shell. The throttle is sleeved on the throttle shaft 14 and fixed with screws.

[0023] This invention features a double-security anti-theft lock with the following operating states: 1. When waiting to unlock, the pin block 18 blocks the pins, making it impossible to directly move the pins.

[0024] 2. Rotating the handle 1 counterclockwise will not work because the transmission cylinder 16 is at its maximum angle position in the groove 35 of the transmission cylinder and there is no room for movement.

[0025] 3. Turn the handle 1 clockwise. The angle of the turn is less than or equal to the angle of the fan-shaped key window 13 on the sealing plate 12 (i.e., the angle between the two radii). At this time, the pin tumbler baffle 18 always blocks the pin 10, and a person cannot directly move the pin 10. When the angle of the turn handle 1 is greater than the angle of the fan-shaped key window 13 on the sealing plate 12, the pin tumbler baffle 18 opens (no longer blocking the pin 10). However, at this time, the sealing plate 12 completely seals the lock case keyhole 24 on the lock case 3, and a person still cannot directly move the pin 10. Regardless of the state of the pin tumbler baffle 18 and the sealing plate 12, at least one part protects the pin 10 from being directly moved. Therefore, there is no opportunity to open the double-security anti-theft lock by directly moving the pin 10. The double-security anti-theft lock can only be opened with the help of the key 11.

[0026] 4. If the handle 1 is forcibly turned clockwise or counterclockwise, because the diameter of the pin 10 is greater than or equal to the diameter of the transmission cylinder 16 of the handle assembly 4, the pin 10 has a stronger anti-tampering ability than the transmission cylinder 16. Therefore, even if the two transmission cylinders 16 are broken, the lock cylinder 6 will still not be able to rotate and the lock will still not be able to be opened.

[0027] 5. Unlocking process: Insert key 11 into the keyhole 24 of the lock case and the keyhole 29 of the lock body through the fan-shaped key window 13 of the handle assembly 4 until the key handle 38 is fully inserted into the keyhole 24 of the lock case. Press the keyhole 24 of the lock case with your finger and rotate the handle 1 clockwise. The advancing and retreating wedge ring 20 of the handle assembly 4 will press the key 11 into place. During this process, the key handle 38 also moves from the outside to the inside of the fan-shaped window on the sealing plate 12. Figure 20 , 21 As shown. Continue rotating the handle 1. The sealing plate 12 first blocks the keyhole 24 of the lock body, and then the pin baffle 18 opens, exposing the pin 10. That is, the pin 10 in the keyhole 29 of the lock body is no longer blocked by the pin baffle 18, as shown. Figure 22 As shown. The inclined groove 19 of the lifting ramp ring 21 of the throttle assembly 4 positions the key handle 38. The advancing and retreating wedge 17 of the advancing and retreating wedge ring 20 enters the key notch 39 on the lower side of the key handle 38. Continuing to rotate the throttle 1, the protrusion of the key 11 enters the pin hole and squeezes the pin 10. The spring in the pin hole is compressed, and the transmission cylinder 16 has no room to rotate within the transmission cylinder groove 35 of the lock cylinder turntable 36, driving the lock cylinder 6 to rotate, and the lock is opened. Figure 23 As shown.

[0028] 6. Locking and Key Retrieval Process: Rotate the handle 1 counterclockwise. The transmission cylinder 16 drives the lock cylinder 6 to rotate. The lifting ramp 21 of the handle assembly 4 pushes the key 11 to the bottom of the keyhole 29 of the lock body. The pin tumbler baffle 18 covers the pin 10 again. Continue rotating the handle 1. The fan-shaped key window 13 passes through the keyhole 24 of the lock case and is in an open position. Under the restoring force of the push spring 8 of the key pushing device, the push block 7 pushes the key 11 outward and removes the key 11. At this point, all parts are reset to their initial state.

[0029] The above embodiments are merely preferred embodiments of the present invention. The structure of the present invention is not limited to the forms listed in the above embodiments. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-security anti-theft lock, characterized in that, The lock assembly includes a throttle assembly (4), a lock housing (3), a lock body (5), and a lock cylinder (6). The throttle assembly (4) includes a sealing plate (12), a throttle shaft (14), a transmission cylinder (16), a pin tumbler baffle (18), a lifting ramp ring (21), and a forward / backward wedge ring (20). The sealing plate (12) is a circular plate. The throttle shaft (14) is formed by the forward extension of the center of the front end surface of the sealing plate (12). The rear end surface of the sealing plate (12) extends backward to form two transmission cylinders (16). The lifting ramp ring (21) extends backward from the circumference of the rear end surface of the sealing plate (12) to form an arc-shaped baffle. The forward / backward wedge ring (20) extends backward from the circumference of the rear end surface of the sealing plate (12). The ring is a circular arc-shaped baffle that extends backward from the outer periphery of the lifting slope ring (21) of the sealing plate (12) and protrudes from the lifting slope ring (21). The pin baffle (18) is a circular arc-shaped baffle formed by extending backward from the rear end surface of the sealing plate (12). The pin baffle (18) is located inside the lifting slope ring (21) in the circumferential direction. The sealing plate (12) of the throttle assembly (4) is also provided with a fan-shaped key window (13) that runs through the front and rear end faces. The lock cylinder is located inside the lock body (5). The rear transmission cylinder (16) of the throttle assembly (4) is connected to the front end of the lock cylinder (6). The lock shell (3) is connected to the front end of the throttle assembly (4) and the lock body (5).

2. The double-security anti-theft lock as described in claim 1, characterized in that, The lock case (3) includes a circular plate-shaped lock case body (22) and an annular lock case baffle (25) extending rearward from the rear surface of the lock case body (22). The inner diameter of the lock case baffle (25) is equal to the outer diameter of the forward and backward wedge ring (20) of the throttle assembly (4). The lock case body (22) has a lock case center hole (23) penetrating the front and rear surfaces of the lock case body (22) in the middle. The lock case body (22) also has a lock case center hole (23) penetrating the front and rear surfaces of the lock case body (22). The lock case keyhole (24) is on the front end of the lock case (3), the lock case (3) is connected to the front end of the throttle assembly (4), the lock case body (22) covers the front end of the sealing plate (12) of the throttle assembly (4), the throttle shaft (14) of the throttle assembly (4) passes through the lock case center hole (23) and protrudes from the front end of the lock case body (22), the lock case retainer (25) covers the outside of the forward and backward wedge ring (20) of the throttle assembly (4), and the rear end face of the lock case retainer (25) abuts against the front end face of the lock body (5).

3. A double-security anti-theft lock as described in claim 2, characterized in that, The lock body (5) has a lock cylinder hole (26) in the middle. A circular baffle cavity (27) extending from the front end of the lock body (5) to the rear is provided around the lock cylinder hole (26). A row of lock body pin holes (28) penetrating the lock cylinder hole (26) is provided on one side wall. The front end of the lock body (5) has a lock body key hole (29) extending to the rear and penetrating the baffle cavity (27). The rear end of the lock body key hole (29) is provided with a key ejection device that can eject the key (11) out of the lock body key hole (29).

4. A double-security anti-theft lock as described in claim 3, characterized in that, The lock shell (3) is connected to the front end of the lock body (5). When the lock shell keyhole (24) corresponds to the lock body keyhole (29), the lock shell (3) and the lock body (5) are welded into an integral structure.

5. A double-security anti-theft lock as described in claim 3, characterized in that, The key ejection device includes a push-out groove (31), a guide cylinder (32), a push-out block (7), and a push-out spring (8). The push-out groove (31) extends forward from the rear end of the lock body (5) and communicates with the keyhole (29) of the lock body. The guide cylinder (32) is located in the push-out groove (31), and the front end of the guide cylinder (32) is integrated with the front wall of the lock body (5). The push-out block (7) is provided with a through hole (37) that cooperates with the guide cylinder (32). 7) The push spring (8) is fitted on the outer surface of the guide cylinder (32) near the rear end. The front end of the push spring (8) is connected to the root of the guide cylinder (32), and the rear end of the push spring (8) is connected to the front end surface of the push block (7). The push block (7) extends into the keyhole (29) of the lock body. Under the restoring force of the push spring (8), the push block (7) can eject the key (11) from the keyhole (29) of the lock body.

6. A double-security anti-theft lock as described in claim 3, characterized in that, The lock cylinder (6) includes a cylindrical lock cylinder body (33) and a lock cylinder turntable (36) connected to the front end of the lock cylinder body (33). A row of lock cylinder pin holes (34) corresponding one-to-one with the positions of the lock body pin holes (28) is provided on one side of the lock cylinder body (33). The outer diameter of the lock cylinder body (33) is equal to the inner diameter of the lock cylinder hole (26) of the lock body (5). The front end face of the lock cylinder turntable (36) is provided with two opposing transmission cylindrical grooves (35). When the lock cylinder body (33) of the lock cylinder (6) is placed in the lock cylinder hole (26) of the lock body (5), each corresponding lock cylinder... A pin (10) and a pin spring (9) are respectively provided in the pin hole (34) and the pin hole (28) of the lock body. The front end face of the lock cylinder turntable (36) is in contact with the rear end face of the sealing plate (12) of the turntable assembly (4). The two transmission cylinders (16) at the rear end of the turntable assembly (4) are respectively positioned in the grooves (35) of the two transmission cylinders of the lock cylinder turntable (36). The pin baffle (18) of the turntable assembly (4) is set in the baffle cavity (27) of the lock body (5). When the turntable shaft (14) of the turntable assembly (4) is rotated, the pin baffle (18) can rotate in the baffle cavity (27) of the lock body (5).

7. A double-security anti-theft lock as described in claim 6, characterized in that, The diameter of the ball (10) is greater than or equal to the diameter of the transmission cylinder (16) connected to the rear end face of the throttle assembly (4) sealing plate (12).

8. A double-security anti-theft lock as described in claim 2, characterized in that, The lifting ramp ring (21) is recessed with a slanted groove (19) that can position the key handle (38). The outer side of the slanted groove (19) extends to the inner side of the advancing and retreating wedge ring (20). A local recess is formed on the inner wall of the advancing and retreating wedge ring (20) near the outer side of the slanted groove (19) to form an advancing and retreating wedge (17) that can be inserted into the key notch (39) on the lower side of the key handle (38) to push the key (11) to move. The ball baffle (18) is located inside the advancing and retreating wedge (17).

9. A double-security anti-theft lock as described in claim 2, characterized in that, The throttle shaft (14) is provided with a screw hole (15) that passes through the center of the throttle shaft (14). The throttle shaft (14) is covered with a throttle (1). The throttle (1) is provided with a hole that is opposite to the screw hole (15) of the throttle shaft (14). The screw (2) passes through the hole of the throttle (1) and enters the screw hole (15) to fix the throttle (1) to the outside of the throttle shaft (14).

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