A plus lock cylinder and opening method

Abstract

The application provides an additive lock cylinder and an opening method. The lock cylinder comprises a lock cylinder body, a rotating lock cylinder installed in the lock cylinder body, a key inserted into the rotating lock cylinder, and a pressing block assembly and a plurality of additive assemblies installed in the lock cylinder body and abutting against the key. Through the double locking mechanism of the pressing block assembly and the additive assembly, the technical opening difficulty of the lock cylinder is increased. The design of the additive beads and the elastic blocks in the additive assembly makes the movement of the lock cylinder components accurate. The design of the pressing blocks and the rolling bodies in the pressing block assembly makes the action flexible when the key is inserted, reduces the friction, ensures the correct position of the internal components of the lock cylinder, and realizes the mechanical structure target of controlling the second re-opening condition through the design of the side column and the latch in the additive assembly.

Description

Technical Field

[0001] This invention relates to an additive lock cylinder and its opening method, and particularly to a lock cylinder technology field. Background Technology

[0002] With social development and technological progress, higher requirements have been placed on the security and reliability of locks, especially in the financial, security, and home sectors, where locks with higher security levels are needed to protect property and personal safety.

[0003] Traditional pin tumbler locks unlock by the teeth on the key engaging with the pins inside the lock cylinder. While this design is simple and reliable, it is easily cracked by technical unlocking methods. Furthermore, the unlocking conditions for pin tumbler locks are relatively simple: whether the mating surfaces of the upper and lower pins are aligned with the mating surfaces of the inner and outer rotating lock cylinders. This simple unlocking mechanism limits the security of the lock.

[0004] In response to the development of technological unlocking methods, a variety of new lock designs have emerged on the market, such as magnetic locks, electronic locks, and biometric locks. However, these locks are often expensive and not suitable for certain application scenarios. Therefore, developing a mechanical lock that is both highly secure and easy to use has become an important research direction. Summary of the Invention

[0005] Purpose of the invention: One purpose is to provide an additive lock cylinder to solve the above-mentioned problems existing in the prior art; a further purpose is to provide a method for opening the above-mentioned lock cylinder.

[0006] The lock cylinder body, the rotary lock cylinder installed in the lock cylinder body, the key inserted into the rotary lock cylinder, and a pressure block assembly and several addition assemblies installed in the lock cylinder body and abutting against the key; The pressure block assembly includes a pressure block ball installed in the lock cylinder body and extending into the rotary lock cylinder, and a ball spring installed in the lock cylinder body and abutting against the pressure block ball. One side of the pressure block ball is provided with a pressure block installed in the lock cylinder body. One end of the pressure block is rotatably connected to the lock cylinder body and the other end is provided with a pressure block spring. The middle section of the pressure block is provided with a rolling body that abuts against the pressure block ball. The pressure block ball is provided with an arc-shaped boss near the rolling body. Each additive component includes a working pin installed in the lock cylinder and extending into the rotary lock cylinder, a working spring installed in the lock cylinder and abutting against the working block pin, an additive pin sleeved on the working pin, an additive block installed on the additive pin and abutting against the pressure block, and a non-shaped pressure spring installed in the lock cylinder and abutting against the additive block. An elastic block is provided at the mating point between the additive pin and the additive block, and a side post installed in the lock cylinder is provided on the other side of the working pin. Both ends of the side post are provided with side post compression springs installed in the lock cylinder body; the side post is provided with a bolt installed in the lock cylinder body on the side opposite to the working ball, the bolt includes a left bolt, a lever movably installed on the left bolt, an elastic body abutting against the lever, a right bolt connected to the elastic body, a bolt compression spring abutting against the right bolt and installed in the lock cylinder body, an unlocking groove opened near the side post of the adder ball, the left bolt extends into the rotating lock cylinder by a certain distance, and a push rod extending to the pressure block is also provided on one side of the left bolt, and a protrusion is provided at the joint between the left bolt and the push rod.

[0007] In a further embodiment, the rotary lock cylinder passes through the lock cylinder body, and a plurality of additive components are sequentially arranged and installed in the lock cylinder body. The pressure block assembly is linked with the additive components. The lock cylinder body is provided with a locking nut for pressing the ball spring, the irregular spring, the side pillar spring and the bolt spring. The locking nut is threadedly engaged with the lock cylinder body.

[0008] In a further embodiment, the two ends of the push rod abut against the pressure block and the left bolt respectively, the side post abuts against the lever block and the abutment of the lever block and the side post is provided with a concave surface; the working ball and the pressure block ball are both clearance-fitted with the lock cylinder body.

[0009] In a further embodiment, the two ends of the pressure block spring abut against the pressure block and the stop pin installed in the lock cylinder body, respectively; the two ends of the side post spring are connected to the lock cylinder body and the side post, respectively; the rolling element rotates with the pressure block and abuts against the arc-shaped boss.

[0010] In a further embodiment, the adding bead has a notch at the working ball, the adding bead is connected to the working ball with a gap, the adding block is connected to the adding bead through a connecting body and a cylindrical wedge, the adding block is in clearance fit with the connecting body and the cylindrical wedge, and the elastic block is located at the fit between the cylindrical wedge and the adding block.

[0011] In a further embodiment, the side post, push rod, and bolt are all slidably engaged with the lock cylinder body, the unlocking groove is clearance-fitted with the side post, and the protrusion is slidably engaged with the push rod.

[0012] A method for opening an additive lock cylinder, used to implement the additive lock cylinder, includes: First, before unlocking normally, when the key was removed from the lock during the last locking, the ball spring controlled the pressure block ball to fall back, causing the pressure block to rotate outward momentarily and then reset. All the adder balls also fell back to their original positions, completing the locking process. When the lock is opened, the key enters the keyhole, and the teeth on the key push the pressure block ball inside the lock cylinder to rise. The arc-shaped boss on the pressure block ball changes the running trajectory of the rolling element, causing the pressure block to rotate. After passing the arc-shaped boss, the pressure block rotates outward momentarily and then resets. All the adder beads also fall down and reset, completing the initialization of the lock. When the key is inserted into the rotating lock cylinder and comes into contact with the working pin, the teeth on the key push the working pin inside the lock cylinder to move, causing the working pin to rise. Due to the pressure of the pressure block spring, the side of the working pin drives the cylindrical wedge block to rise, and at the same time drives the addition block and the addition pin to rise, which in turn causes the key teeth to rise. When the key further enters the keyhole and engages the first key tooth that contacts the working pin, the key tooth will descend. The working pin will descend under the action of the working spring. Due to the inward contraction of the cylindrical wedge block under the rotation of the pressure block, the descent of the working pin is only relative to the downward sliding of the adder block. The adder block cannot descend due to the action of the cylindrical wedge block, thus allowing the adder ball to complete the upward process of one key tooth. As the key further enters the keyhole, when the second tooth on the key contacts the first working pin, the adder pin, which works in conjunction with the first working pin, completes the previous step again, and the adder pin records the second rise of the key tooth once more. When the key is fully inserted into the rotating lock cylinder, the change in the height of the key teeth causes the first adder bead to record the height of all the key teeth. Since the second adder bead does not interact with the last tooth on the key, it only records the height of the preceding key teeth. And so on, with each subsequent adder bead recording fewer and fewer key teeth. When the correct key is fully inserted into the rotary lock cylinder, all the unlocking slots on the adder beads are aligned with the side pins, and the upper and lower parts of all the working pins are aligned with the mating surfaces of the inner and outer rotary lock cylinders, turn the key to the right. This will cause the rotary lock cylinder to rotate to the right, which in turn will cause the bolt to rise, press the side pins into the unlocking slots, and the rotary lock cylinder will rotate under the key's influence, thus unlocking the lock. When the unlocking groove on the adder bead is not in a straight line with the side post, and the side post cannot enter the unlocking groove, the bolt cannot rise due to the obstruction of the side post, causing the rotary lock cylinder to jam and not rotate; after the appropriate key is fully inserted into the rotary lock cylinder, the rotary lock cylinder rotates and drives the bolt to rise. When the bolt rises by 0.5mm, the side post is pressed into the unlocking groove under the action of the lever, and at this time the push rod does not move. When the bolt rises 1mm, the side post moves out of the unlocking groove under the action of the side post compression spring. At this time, the push rod pushes the pressure block on the bolt, causing the pressure block to separate from the adder beads. Then, due to the concave surface of the push block, the side post resets to the concave surface. At this time, all the adder beads fall to zero. When the key is to be removed from the rotary lock cylinder, the rotary lock cylinder is first rotated to the starting position. At this time, the bolt falls under the action of the bolt spring. During the falling process, the protrusion on the bolt acts to move the push rod, thereby causing the pressure block to rotate outward. When the bolt falls to the point where the lever touches the side post, the side post cannot move into the unlocking groove because the unlocking groove of the adder bead is fully reset. The lever can only rotate counterclockwise under the action of the side post. When the bolt is fully reset, the elastic body presses the lever to rotate and reset. At this time, all the adder beads return to the initial state, and the key can be pulled out of the keyhole of the rotary lock cylinder. When the key is pulled out, the adder beads will still move upward, but the key will not be stuck. When the key finally leaves the keyhole, the control block pins reset, and the pin spring controls the arc-shaped boss of the control block pins to make the rolling element push the control block to rotate again, and all the adder pins fall back to zero; the lock cylinder re-enters the locked state.

[0013] Beneficial effects: This invention proposes an additive lock cylinder and its opening method. Through the dual locking mechanism of the pressure block assembly and the additive assembly, the technical difficulty of unlocking the lock cylinder is increased. The design of the additive bead and elastic block in the additive assembly makes the movement of the lock cylinder components precise. The design of the pressure block and rolling element in the pressure block assembly allows for flexible movement and reduces friction when the key is inserted, ensuring the correct position of the internal components of the lock cylinder. The design of the side post and bolt in the additive assembly achieves the mechanical structural goal of controlling the second unlocking condition, greatly increasing the difficulty of unlocking. The lock cylinder can only be opened when multiple unlocking conditions are met simultaneously, which improves the security of the lock cylinder and makes it more advantageous in situations with high security requirements; when multiple unlocking slots move up and down to a certain set height in a straight line, the side pin can enter the unlocking slot, and the bolt can work under the push of the rotating lock cylinder; the rising and falling process of the bolt is strictly controlled, and only the correct key can make the bolt rise and drive the rotating lock cylinder to rotate, thereby completing the unlocking. The engagement of the side post with the unlocking slot on the adder bead further increases the difficulty of unlocking; unlocking can only be completed when the unlocking slot on the adder bead and the side post are in a straight line; the push rod abuts against the pressure block and the left bolt, and the action of the push rod ensures that the pressure block and the adder assembly can be fully reset after the key is removed; the design of the push rod ensures that the reset process after each unlocking is more reliable, avoiding difficulties in unlocking the next time due to incomplete reset. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the left half-section of the present invention.

[0016] Figure 3 This is a half-sectional schematic diagram of the left-side pressure block assembly of the present invention.

[0017] Figure 4 This is a trapezoidal cross-sectional view of the left-side additive component of the present invention.

[0018] Figure 5 This is a schematic diagram of the toggle block structure of the present invention.

[0019] Figure 6 This is a schematic diagram of the working ball structure of the present invention.

[0020] Figure 7 This is a schematic diagram of the pressure block ball structure of the present invention.

[0021] The attached diagram is labeled as follows: 1. Lock cylinder body; 2. Side post compression spring; 3. Irregular compression spring; 4. Bolt; 12. Key; 13. Rotary lock cylinder; 21. Pressure block pin; 22. Arc-shaped boss; 23. Pressure block; 24. Rolling element; 25. Pin compression spring; 26. Pressure block compression spring; 31. Working pin; 32. Working compression spring; 41. Adding block; 42. Connecting body; 43. Cylindrical wedge block; 44. Elastic block; 45. Adding bead; 46. Side post; 47. Bolt compression spring; 48. Pulley block; 49. Elastic element; 50. Push rod; 261. Stop pin; 451. Unlocking groove. Detailed Implementation

[0022] The applicant argues that traditional pin tumbler locks unlock by the teeth on the key engaging with the pins inside the lock cylinder. While this design is simple and reliable, it is easily cracked by technical unlocking methods. Furthermore, the unlocking conditions for pin tumbler locks are relatively simple: whether the mating surfaces of the upper and lower pins are aligned with the mating surfaces of the inner and outer rotating lock cylinders. This simple unlocking mechanism limits the security of the lock.

[0023] To address the problems existing in the prior art, this invention provides an additive lock cylinder and an opening method to achieve multiple protections for the lock cylinder.

[0024] The present solution will be further described in detail below through embodiments and with reference to the accompanying drawings.

[0025] In this application, we propose a multi-lock cylinder and a method for opening it, wherein the multi-lock cylinder includes: The lock cylinder body 1, the rotary lock cylinder 13 installed in the lock cylinder body 1, the key 12 inserted into the rotary lock cylinder 13, and a pressure block assembly and several additive assemblies installed in the lock cylinder body 1 and abutting against the key 12; the rotary lock cylinder 13 passes through the lock cylinder body 1, and several additive assemblies are arranged sequentially in the lock cylinder body 1. The pressure block assembly is linked with the additive assemblies. The lock cylinder body 1 is provided with a locking nut for pressing the ball spring 25, the irregular spring 3, the side column spring 2 and the bolt spring 47. The locking nut is threadedly engaged with the lock cylinder body 1.

[0026] The pressure block assembly includes a pressure block ball 21 installed inside the lock cylinder body 1 and extending into the rotary lock cylinder 13, and a ball spring 25 installed inside the lock cylinder body 1 and abutting against the pressure block ball 21. A pressure block 23 installed inside the lock cylinder body 1 is provided on one side of the pressure block ball 21. One end of the pressure block 23 is rotatably connected to the lock cylinder body 1, and the other end is provided with a pressure block spring 26. Both ends of the pressure block spring 26 abut against the pressure block 23 and a stop pin 261 installed inside the lock cylinder body 1, respectively. A rolling element 24 abutting against the pressure block ball 21 is provided in the middle section of the pressure block 23. The rolling element 24 rotatably engages with the pressure block 23 and abuts against an arc-shaped boss 22. An arc-shaped boss 22 is provided on the pressure block ball 21 near the rolling element 24. Each additive component includes a working pin 31 installed inside the lock cylinder body 1 and extending into the rotary lock cylinder 13, a working compression spring 32 installed inside the lock cylinder body 1 and abutting against the working block pin, an additive pin 45 sleeved on the working pin 31, an additive block 41 installed on the additive pin 45 and abutting against the pressure block 23, and a special-shaped compression spring 3 installed inside the lock cylinder body 1 and abutting against the additive block 41. An elastic block 44 is provided at the mating point between the additive pin 45 and the additive block 41. A side post 46 installed inside the lock cylinder body 1 is provided on the other side of the working pin 31. The side post 46 abuts against the lever 48, and a concave surface is provided at the abutment point between the lever 48 and the side post 46. Both the working pin 31 and the pressure block pin 21 are in clearance fit with the lock cylinder body 1.

[0027] The adder bead 45 has a notch at the working ball 31. The adder bead 45 is connected to the working ball 31 with a gap. The adder block 41 is connected to the adder bead 45 through the connecting body 42 and the cylindrical wedge block 43. The adder block 41 is in clearance fit with the connecting body 42 and the cylindrical wedge block 43. The elastic block 44 is located at the fit between the cylindrical wedge block 43 and the adder block.

[0028] The two ends of the side post 46 are provided with side post compression springs 2 installed on the lock cylinder body 1; the two ends of the side post compression springs 2 are respectively connected to the lock cylinder body 1 and the side post 46; the side post 46 is provided with a bolt 4 installed in the lock cylinder body 1 on the side opposite to the working ball 31, the bolt 4 includes a left bolt, a lever 48 movably installed on the left bolt, an elastic body 49 abutting against the lever 48, a right bolt connected to the elastic body 49, and a bolt compression spring 47 abutting against the right bolt and installed in the lock cylinder body 1, the adder ball A locking groove 451 is provided near the side post 46. The left bolt extends a certain distance into the rotary lock cylinder 13. A push rod 50 extending to the pressure block 23 is also provided on one side of the left bolt. The two ends of the push rod 50 abut against the pressure block 23 and the left bolt, respectively. A protrusion is provided at the joint between the left bolt and the push rod 50. The side post 46, the push rod 50 and the locking bolt 4 are all slidably engaged with the lock cylinder body 1. The locking groove 451 is clearance engaged with the side post 46. The protrusion is slidably engaged with the push rod 50.

[0029] A method for opening an additive lock cylinder, used to implement the additive lock cylinder, includes: First, before normal unlocking, when the key 12 was pulled out of the lock hole during the last locking, the ball spring 25 controlled the pressure block ball 21 to fall back, which caused the pressure block 23 to rotate outward momentarily and then reset. All the addition balls 45 also fell and reset, completing the locking process. When the lock is unlocked, the key 12 enters the keyhole. The teeth on the key 12 push the pressure block ball 21 inside the lock cylinder 1 to rise. The arc-shaped boss 22 on the pressure block ball 21 changes the running trajectory of the rolling body 24, causing the pressure block 23 to rotate. After passing the arc-shaped boss 22, the pressure block 23 rotates outward momentarily and then resets. All the adder balls 45 also fall down and reset, completing the initialization of the lock. When the key 12 is inserted into the rotating lock cylinder 13 and comes into contact with the working pin 31, the teeth of the key 12 push the working pin 31 inside the lock cylinder 1 to move, causing the working pin 31 to rise. As the pressure block 23 is pressed by the pressure block spring 26, the side of the working pin 31 drives the cylindrical wedge block 43 to rise, and at the same time drives the addition block 41 and the addition pin 45 to rise, thus causing the teeth of the key 12 to rise.

[0030] When the key 12 further enters the keyhole and the first key 12 tooth in contact with the working ball 31 is engaged, the key 12 tooth will descend. The working ball 31 descends under the action of the working spring 32. As the cylindrical wedge block 43 retracts under the rotation of the pressure block 23, the descent of the working ball 31 only slides downward relative to the addition block 41. The addition block 41 cannot descend due to the action of the cylindrical wedge block 43, thus allowing the addition ball 45 to complete the rising process of one key 12 tooth. When the key 12 further enters the keyhole, and the second tooth on the key 12 contacts the first working pin 31, the adder 45, which cooperates with the first working pin 31, completes the previous step again, and the adder 45 records the second rise height of the key 12 tooth once more. When key 12 is fully inserted into the rotary lock cylinder 13, the change in the height of the key 12 teeth causes the first adder bead 45 to record the height of all the key 12 teeth. Since the second adder bead 45 does not interact with the last tooth on key 12, it only records the height of the preceding key 12 teeth. And so on, the number of key 12 teeth recorded by the subsequent adder bead 45 decreases. When the lock is opened with the appropriate key 12, the unlocking groove 451 on the adder bead 45 is aligned with the side post 46. When the appropriate key 12 is fully inserted into the rotary lock cylinder 13, all the unlocking grooves 451 on the adder bead 45 are aligned with the side post 46, and the upper and lower parts of all the working pins 31 are aligned with the mating surfaces of the inner and outer rotary lock cylinder 13. When the key 12 is turned to the right, the rotary lock cylinder 13 is rotated to the right. The rotation of the rotary lock cylinder 13 causes the bolt 4 to rise, and the side post 46 is pressed into the unlocking groove 451. The rotary lock cylinder 13 rotates under the action of the key 12, thus completing the unlocking process. The unlocking groove 451 on the adder bead 45 corresponds to the teeth of the key 12 and is set at different heights. When the unlocking groove 451 on the adder bead 45 is not on a straight line with the side post 46, and the side post 46 cannot enter the unlocking groove 451, the bolt 4 cannot rise due to the obstruction of the side post 46, causing the rotary lock cylinder 13 to jam and not rotate; after the appropriate key 12 is fully inserted into the rotary lock cylinder 13, the rotary lock cylinder 13 rotates and drives the bolt 4 to rise. When the bolt 4 rises by 0.5mm, the side post 46 is pressed into the unlocking groove 451 under the action of the lever 48, at which time the push rod 50 does not move; When the bolt 4 rises by 1 mm, the side post 46 moves out of the unlocking groove 451 under the action of the side post compression spring 2. At this time, the push rod 50 pushes the pressure block 23 on the bolt 4, causing the pressure block 23 to separate from the addition bead 45. Then, due to the concave surface of the push block 48, the side post 46 returns to the concave surface direction. At this time, all the addition beads 45 fall to zero. When the key 12 is pulled out of the rotary lock cylinder 13, the rotary lock cylinder 13 is first rotated to the starting position. At this time, the bolt 4 falls under the action of the bolt spring 47. During the falling process, the protrusion on the bolt 4 causes the push rod 50 to move, thereby causing the pressure block 23 to rotate outward. When the bolt 4 falls to the point where the lever 48 touches the side post 46, the side post 46 cannot move into the unlocking groove 451 of the adder bead 45 because it is fully reset. The lever 48 can only rotate counterclockwise under the action of the side post 46. When the bolt 4 is fully reset, the elastic body 49 presses the lever 48 to rotate and reset. At this time, all the adder beads 45 return to the initial state, and the key 12 can be pulled out in the key 12 hole of the rotary lock cylinder 13. When the key 12 is pulled out, the adder beads 45 will still move upward, but the key 12 will not be stuck. When the key 12 finally leaves the keyhole, the control block ball 21 resets, and the ball spring 25 controls the arc-shaped boss 22 of the control block ball 21 to make the rolling body 24 push the block 23 to rotate again, and all the addition balls 45 fall back to zero; the lock cylinder re-enters the locked state.

[0031] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A multi-lock cylinder, comprising: The lock cylinder body, the rotary lock cylinder installed in the lock cylinder body, the key inserted into the rotary lock cylinder, and a pressure block assembly and several addition assemblies installed in the lock cylinder body and abutting against the key; The pressure block assembly is characterized in that it includes a pressure block ball installed in the lock cylinder body and extending into the rotary lock cylinder, a ball spring installed in the lock cylinder body and abutting against the pressure block ball, a pressure block installed in the lock cylinder body is provided on one side of the pressure block ball, one end of the pressure block is rotatably connected to the lock cylinder body and the other end is provided with a pressure block spring, a rolling body abutting against the pressure block ball is provided in the middle section of the pressure block, and an arc-shaped boss is provided near the rolling body of the pressure block ball; Each additive component includes a working pin installed in the lock cylinder and extending into the rotary lock cylinder, a working spring installed in the lock cylinder and abutting against the working block pin, an additive pin sleeved on the working pin, an additive block installed on the additive pin and abutting against the pressure block, and a non-shaped pressure spring installed in the lock cylinder and abutting against the additive block. An elastic block is provided at the mating point between the additive pin and the additive block, and a side post installed in the lock cylinder is provided on the other side of the working pin. Both ends of the side post are provided with side post compression springs installed in the lock cylinder body; the side post is provided with a bolt installed in the lock cylinder body on the side opposite to the working ball, the bolt includes a left bolt, a lever movably installed on the left bolt, an elastic body abutting against the lever, a right bolt connected to the elastic body, a bolt compression spring abutting against the right bolt and installed in the lock cylinder body, an unlocking groove opened near the side post of the adder ball, the left bolt extends into the rotating lock cylinder by a certain distance, and a push rod extending to the pressure block is also provided on one side of the left bolt, and a protrusion is provided at the joint between the left bolt and the push rod.

2. The addition lock cylinder according to claim 1, characterized in that, The rotary lock cylinder passes through the lock cylinder body, and several additive components are sequentially arranged and installed in the lock cylinder body. The pressure block assembly is linked with the additive components. The lock cylinder body is provided with a locking nut for pressing the ball spring, the irregular spring, the side column spring and the bolt spring. The locking nut is threadedly engaged with the lock cylinder body.

3. The addition lock cylinder according to claim 1, characterized in that, The two ends of the push rod abut against the pressure block and the left bolt respectively, the side post abuts against the lever block and the part where the lever block abuts against the side post is provided with a concave surface; the working ball and the pressure block ball are both clearance-fitted with the lock cylinder body.

4. The addition lock cylinder according to claim 1, characterized in that, The two ends of the pressure block spring abut against the pressure block and the stop pin installed in the lock cylinder, respectively; the two ends of the side post spring are connected to the lock cylinder and the side post, respectively; the rolling element rotates with the pressure block and abuts against the arc-shaped boss.

5. The addition lock cylinder according to claim 1, characterized in that, The addition bead has a notch at the working ball, and the addition bead is connected to the working ball with a gap. The addition block is connected to the addition bead through a connecting body and a cylindrical wedge. The addition block is in clearance fit with the connecting body and the cylindrical wedge. The elastic block is located at the fit between the cylindrical wedge and the addition block.

6. The addition lock cylinder according to claim 1, characterized in that, The side post, push rod, and bolt are all slidably engaged with the lock cylinder body, the unlocking groove is clearance-fitted with the side post, and the protrusion is slidably engaged with the push rod.

7. A method for opening a multi-lock cylinder, applied to the multi-lock cylinder according to any one of claims 1 to 6, characterized in that, include: First, before unlocking normally, when the key was removed from the lock during the last locking, the ball spring controlled the pressure block ball to fall back, causing the pressure block to rotate outward momentarily and then reset. All the adder balls also fell back to their original positions, completing the locking process. When the lock is opened, the key enters the keyhole, and the teeth on the key push the pressure block ball inside the lock cylinder to rise. The arc-shaped boss on the pressure block ball changes the running trajectory of the rolling element, causing the pressure block to rotate. After passing the arc-shaped boss, the pressure block rotates outward momentarily and then resets. All the adder beads also fall down and reset, completing the initialization of the lock. When the key is inserted into the rotating lock cylinder and comes into contact with the working pin, the teeth on the key push the working pin inside the lock cylinder to move, causing the working pin to rise. Due to the pressure of the pressure block spring, the side of the working pin drives the cylindrical wedge block to rise, and at the same time drives the addition block and the addition pin to rise, which in turn causes the key teeth to rise. When the key further enters the keyhole and engages the first key tooth that contacts the working pin, the key tooth will descend. The working pin will descend under the action of the working spring. Due to the inward contraction of the cylindrical wedge block under the rotation of the pressure block, the descent of the working pin is only relative to the downward sliding of the adder block. The adder block cannot descend due to the action of the cylindrical wedge block, thus allowing the adder ball to complete the upward process of one key tooth. As the key further enters the keyhole, when the second tooth on the key contacts the first working pin, the adder pin, which works in conjunction with the first working pin, completes the previous step again, and the adder pin records the second rise of the key tooth once more. When the key is fully inserted into the rotating lock cylinder, the change in the height of the key teeth causes the first adder bead to record the height of all the key teeth. Since the second adder bead does not interact with the last tooth on the key, it only records the height of the preceding key teeth. And so on, with each subsequent adder bead recording fewer and fewer key teeth. When the correct key is fully inserted into the rotary lock cylinder, all the unlocking slots on the adder beads are aligned with the side pins, and the upper and lower parts of all the working pins are aligned with the mating surfaces of the inner and outer rotary lock cylinders, turn the key to the right. This will cause the rotary lock cylinder to rotate to the right, which in turn will cause the bolt to rise, press the side pins into the unlocking slots, and the rotary lock cylinder will rotate under the key's influence, thus unlocking the lock. When the unlocking groove on the adder bead is not in a straight line with the side post, and the side post cannot enter the unlocking groove, the bolt cannot rise due to the obstruction of the side post, causing the rotary lock cylinder to jam and not rotate; after the appropriate key is fully inserted into the rotary lock cylinder, the rotary lock cylinder rotates and drives the bolt to rise. When the bolt rises by 0.5mm, the side post is pressed into the unlocking groove under the action of the lever, and at this time the push rod does not move. When the bolt rises 1mm, the side post moves out of the unlocking groove under the action of the side post compression spring. At this time, the push rod pushes the pressure block on the bolt, causing the pressure block to separate from the adder beads. Then, due to the concave surface of the push block, the side post resets to the concave surface. At this time, all the adder beads fall to zero. When the key is to be removed from the rotary lock cylinder, the rotary lock cylinder is first rotated to the starting position. At this time, the bolt falls under the action of the bolt spring. During the falling process, the protrusion on the bolt acts to move the push rod, thereby causing the pressure block to rotate outward. When the bolt falls to the point where the lever touches the side post, the side post cannot move into the unlocking groove because the unlocking groove of the adder bead is fully reset. The lever can only rotate counterclockwise under the action of the side post. When the bolt is fully reset, the elastic body presses the lever to rotate and reset. At this time, all the adder beads return to the initial state, and the key can be pulled out of the keyhole of the rotary lock cylinder. When the key is pulled out, the adder beads will still move upward, but the key will not be stuck. When the key finally leaves the keyhole, the control block pins reset, and the pin spring controls the arc-shaped boss of the control block pins to make the rolling element push the control block to rotate again, and all the addition pins fall back to zero; the lock cylinder re-enters the locked state.

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