Addition lock cylinder and opening method

Abstract

The invention provides a lock cylinder of an addition lock and an opening method. The lock cylinder comprises a lock cylinder body, a rotary lock cylinder installed in the lock cylinder body, a key inserted into the rotary lock cylinder, a pressing block assembly and a plurality of addition assemblies, wherein the pressing block assembly and the addition assemblies are installed in the lock cylinder body and abut against the key. Through the double locking mechanism of the pressing block assembly and the addition assembly, the technical unlocking difficulty of the lock cylinder is increased, the design of addition beads and elastic blocks in the addition assembly enables the movement action of the lock cylinder part to be accurate, and the design of pressing blocks and rolling bodies in the pressing block assembly enables the action to be flexible and friction to be reduced when a key is inserted. Correct positions of components in the lock cylinder are ensured, and the design of a side column and a brake bolt in the addition assembly achieves the purpose of controlling the mechanical structure aspect of the second unlocking condition.

Description

Technical Field

[0001] The invention relates to an additive lock core and an opening method, in particular to the technical field of a lock core. Background Art

[0002] With the development of society and the advancement of technology, higher requirements are placed on the safety and reliability of locks, especially in the fields of finance, security, and home, where locks with higher security levels are needed to protect property and personal safety.

[0003] Traditional pin-tumbler locks are unlocked by the teeth on the key and the pins in the lock cylinder. Although this design is simple and reliable, it is easily cracked by technical unlocking methods. In addition, the unlocking conditions of pin-tumbler locks are relatively simple, that is, whether the upper and lower pin joint surfaces are aligned with the inner and outer rotating lock cylinder joint surfaces. This simple unlocking mechanism limits the security of the lock.

[0004] In order to cope with the development of technical unlocking methods, a variety of new lock designs have appeared on the market, such as magnetic locks, electronic locks, biometric locks, etc. However, these locks are often costly and are not suitable in some 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 propose an additive lock cylinder to solve the above-mentioned problems existing in the prior art; a further purpose is to propose a method for opening the above-mentioned lock cylinder.

[0006] A lock core body, a rotary lock core installed in the lock core body, a key inserted into the rotary lock core, and a pressing block assembly and a plurality of adding assemblies installed in the lock core body and abutting against the key;

[0007] The pressure block assembly includes a pressure block marble installed in the lock core and extending to the rotating lock core, a marble pressure spring installed in the lock core and abutting against the pressure block marble, one side of the pressure block marble is provided with a pressure block installed in the lock core, one end of the pressure block is rotatably connected to the lock core 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 abutting against the pressure block marble, and the pressure block marble is provided with an arc-shaped boss near the rolling body;

[0008] Each adding assembly includes a working marble installed in the lock core and extending into the rotating lock core, a working compression spring installed in the lock core and abutting against the working marble, an adding ball sleeved on the working marble, an adding block installed on the adding ball and abutting against the compression block, and a special-shaped compression spring installed in the lock core and abutting against the adding block, an elastic block is provided at the matching position between the adding ball and the adding block, and a side column installed in the lock core is provided on the other side of the working marble;

[0009] Both ends of the side column are provided with side column compression springs installed on the lock core body; the side column opposite to the working marble is provided with a tumbler installed in the lock core body, the tumbler includes a left bolt, a shift block movably installed on the left bolt, an elastic body abutting the shift block, a right bolt connected to the elastic body, and a tumbler compression spring abutting the right bolt and installed in the lock core body, an unlocking groove is provided at the position of the addition bead close to the side column, the left bolt extends to the rotating lock core for a 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 cooperation between the left bolt and the push rod.

[0010] In a further embodiment, the rotating lock core passes through the lock core body, a plurality of adding components are arranged in sequence and installed in the lock core body, the pressure block assembly is linked with the adding component, and the lock core body is provided with a locking nut for tightening the ball compression spring, special-shaped compression spring, side column compression spring and bolt compression spring, and the locking nut is threadedly matched with the lock core body.

[0011] In a further embodiment, the two ends of the push rod are respectively abutted against the pressure block and the left bolt, the side column is abutted against the shift block, and a concave surface is provided at the abutment between the shift block and the side column; the working marble and the pressure block marble are both gap-matched with the lock core body.

[0012] In a further embodiment, the two ends of the pressure block compression spring are respectively abutted against the pressure block and a stop pin installed in the lock core body, and the two ends of the side column compression spring are respectively connected to the lock core body and the side column; the rolling body is rotatably matched with the pressure block, and the rolling body is abutted against the arc-shaped boss.

[0013] In a further embodiment, the adding bead is provided with a notch at the working marble, the adding bead is gap-connected with the working marble, the adding block is connected to the adding bead through a connecting body and a cylindrical wedge, the adding blocks are gap-matched with the connecting body and the cylindrical wedge, and the elastic block is located at the matching position of the cylindrical wedge and the accelerating block.

[0014] In a further embodiment, the side column, the push rod and the tumbler are all slidably matched with the lock core body, the unlocking groove is gap-matched with the side column, and the protrusion is slidably matched with the push rod.

[0015] A method for opening an additive lock cylinder, used to implement the additive lock cylinder, comprising:

[0016] First, before normal unlocking, when the key was pulled out of the lock hole last time, the marble compression spring controlled the marble of the pressure block to fall back, driving the pressure block to rotate outward instantly and then reset, and all the addition beads also fell and reset, completing the lock;

[0017] When unlocking the lock, the key enters the lock hole, and the teeth on the key push the pressure block marble in the lock core to rise. The arc-shaped boss on the pressure block marble changes the running trajectory of the rolling body to make the pressure block rotate. After passing the arc-shaped boss, the pressure block is driven to rotate outward instantly and then reset. All the addition beads also fall and reset, completing the initialization of the lock;

[0018] When the key goes deep into the rotating lock cylinder and contacts the working marble, the teeth on the key push the working marble in the lock cylinder to move, causing the working marble to rise. Because the pressure block is under the tight pressure of the pressure block compression spring, the side of the working marble drives the cylindrical wedge block to rise, and at the same time drives the addition block and the addition ball to rise, which is the rising process of the key teeth;

[0019] When the key further enters the lock hole and the first key tooth in contact with the working marble works, the key tooth will drop, and the working marble drops under the action of the working compression spring. As the cylindrical wedge retracts under the rotation of the pressure block, the working marble drops and slides downward relative to the addition block. The addition block cannot drop due to the action of the cylindrical wedge, so that the addition ball completes the rising process of one key tooth.

[0020] When the key further enters the keyhole and the second tooth on the key contacts the first working marble, the adding bead that cooperates with the first working marble completes the process of the previous step again, and the adding bead once again records the second rising height of the key tooth;

[0021] When the key fully enters the rotary lock cylinder, the height change of the key teeth causes the first adding bead to record the rising height of all the key teeth. Since the second adding bead has no working relationship with the last tooth on the key, it only records the rising height of the previous key teeth. And so on, the number of key teeth recorded by the following adding beads becomes less and less.

[0022] When the appropriate key is fully inserted into the rotary lock cylinder, the unlocking grooves on all the adding beads are in a straight line with the side columns, and the upper and lower parts of all the working marbles are also in line with the joint surface of the inner and outer rotary lock cylinders, the key is turned right, which drives the rotary lock cylinder to turn right, and the right rotation of the rotary lock cylinder drives the tumbler to rise, the side columns are pressed into the unlocking grooves, and the rotary lock cylinder rotates driven by the key, thereby completing the unlocking;

[0023] When the unlocking groove on the addition bead is not in a straight line with the side column, and the side column cannot enter the unlocking groove, the tumbler cannot rise due to the obstruction of the side column, so that the rotary lock cylinder is stuck and cannot rotate; after the appropriate key completely enters the rotary lock cylinder, the rotary lock cylinder rotates and drives the tumbler to rise. When the tumbler rises 0.5mm, the side column is pressed into the unlocking groove under the action of the shift block, and the push rod does not move at this time;

[0024] When the tumbler rises 1mm, the side column moves out of the unlocking slot under the action of the side column compression spring. At this time, the protrusion of the push rod on the tumbler pushes the pressure block to separate the pressure block from the addition beads. Then, due to the concave surface of the shift block, the side column resets to the concave surface direction. At this time, all the addition beads fall back to zero.

[0025] When the key is to be pulled out of the rotary lock cylinder, the rotary lock cylinder is first rotated to the starting position. At this time, the tumbler falls under the action of the tumbler compression spring. During the falling process, the convex part on the tumbler acts to move the push rod, thereby causing the pressure block to rotate outward;

[0026] When the tumbler falls down until the shifting block hits the side column, the unlocking slot of the adding bead is completely reset, and the side column cannot move into the unlocking slot. The shifting block can only rotate counterclockwise under the action of the side column. When the tumbler is completely reset, the elastic body presses the shifting block to rotate and reset. At this time, all the adding beads return to the starting state, and the key can be pulled out of the keyhole of the rotary lock cylinder. When the key is pulled out, the adding bead will still move upward, but the key will not be stuck.

[0027] When the key finally leaves the keyhole, the pressure block marble is controlled to reset, and the marble compression spring controls the arc-shaped boss of the pressure block marble to make the rolling body push the pressure block to rotate again, and all the adding beads fall back to zero; the lock cylinder enters the locked state again.

[0028] Beneficial effects: The present invention proposes an additive lock cylinder and an opening method. The double locking mechanism of the pressure block assembly and the additive assembly increases the technical unlocking difficulty of the lock cylinder. The design of the additive bead and the elastic block in the additive assembly enables the movement of the lock cylinder components to be precise. The design of the pressure block and the rolling body in the pressure block assembly enables flexible movement and reduced friction when the key is inserted, ensuring the correct position of the internal components of the lock cylinder. The design of the side column and the tumbler in the additive assembly achieves the mechanical structure goal of controlling the second unlocking condition, greatly increasing the unlocking difficulty.

[0029] The lock core can only be opened when multiple unlocking conditions are met at the same time, which improves the security of the lock core and makes it more advantageous in situations with high security requirements; when multiple unlocking slots move up and down to a straight line at a certain set height, the side column can enter the unlocking slot and the tumbler can work under the push of the rotating lock core; the rising and falling process of the tumbler is strictly controlled, and only the correct key can make the tumbler rise and drive the rotating lock core to rotate, thereby completing the unlocking;

[0030] The cooperation between the side column and the unlocking groove on the adding bead further increases the difficulty of unlocking; unlocking can only be completed when the unlocking groove on the adding bead and the side column are in a straight line; the push rod abuts against the pressure block and the left bolt, and the action of the push rod can ensure that the pressure block and the adding assembly can be completely reset after the key is pulled out; the design of the push rod ensures that the reset process after each unlocking is more reliable, avoiding the difficulty of unlocking the next time due to incomplete reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0032] Figure 2 It is a left half-section schematic diagram of the present invention.

[0033] Figure 3 It is a half-section schematic diagram of a left-side view of a pressing block assembly of the present invention.

[0034] Figure 4 It is a trapezoidal cross-sectional view of the left-view adding component of the present invention.

[0035] Figure 5 It is a schematic diagram of the structure of the shifting block of the present invention.

[0036] Figure 6 It is a schematic diagram of the working marble structure of the present invention.

[0037] Figure 7 It is a schematic diagram of the structure of the pressed marbles of the present invention.

[0038] The accompanying drawings are marked as follows: 1. lock core body; 2. side column compression spring; 3. special-shaped compression spring; 4. tumbler; 12. key; 13. rotary lock core; 21. pressure block marble; 22. arc-shaped boss; 23. pressure block; 24. rolling body; 25. marble compression spring; 26. pressure block compression spring; 31. working marble; 32. working compression spring; 41. adding block; 42. connecting body; 43. cylindrical wedge block; 44. elastic block; 45. adding ball; 46. side column; 47. tumbler compression spring; 48. dial block; 49. elastic body; 50. push rod; 261. stop pin; 451. unlocking groove. DETAILED DESCRIPTION

[0039] The applicant believes that the traditional pin-and-tumbler lock is unlocked by the teeth on the key and the pins in the lock core. Although this design is simple and reliable, it is easily cracked by technical unlocking methods. In addition, the unlocking conditions of the pin-and-tumbler lock are relatively simple, that is, whether the upper and lower pin joint surfaces are in the same line with the inner and outer rotating lock core joint surfaces. This simple unlocking mechanism limits the safety of the lock.

[0040] In order to solve the problems existing in the prior art, the present invention realizes multiple protections of the lock core through an additive lock core and an opening method.

[0041] The present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0042] In this application, we propose an additive lock cylinder and an opening method, wherein an additive lock cylinder includes:

[0043] A lock core body 1, a rotating lock core 13 installed in the lock core body 1, a key 12 inserted into the rotating lock core 13, and a pressure block assembly and a plurality of addition assemblies installed in the lock core body 1 and abutting against the key 12; the rotating lock core 13 runs through the lock core body 1, and a plurality of addition assemblies are arranged in sequence and installed in the lock core body 1, the pressure block assembly is linked with the addition assembly, and the lock core body 1 is provided with a locking nut for tightening the ball compression spring 25, the special-shaped compression spring 3, the side column compression spring 2 and the bolt compression spring 47, and the locking nut is threadedly matched with the lock core body 1.

[0044] The pressure block assembly includes a pressure block marble 21 installed in the lock core body 1 and extending into the rotating lock core 13, a marble compression spring 25 installed in the lock core body 1 and abutting against the pressure block marble 21, one side of the pressure block marble 21 is provided with a pressure block 23 installed in the lock core body 1, one end of the pressure block 23 is rotatably connected to the lock core body 1 and the other end is provided with a pressure block compression spring 26, the two ends of the pressure block compression spring 26 are respectively abutted against the pressure block 23 and a stop pin 261 installed in the lock core body 1, the middle section of the pressure block 23 is provided with a rolling body 24 abutting against the pressure block marble 21, the rolling body 24 is rotatably matched with the pressure block 23, and the rolling body 24 abuts against the arc boss 22; the pressure block marble 21 is provided with an arc boss 22 near the rolling body 24;

[0045] Each adding component includes a working marble 31 installed in the lock core body 1 and extending into the rotating lock core 13, a working compression spring 32 installed in the lock core body 1 and abutting against the working block marble, an adding ball 45 sleeved on the working marble 31, an adding block 41 installed on the adding ball 45 and abutting against the pressure block 23, and a special-shaped compression spring 3 installed in the lock core body 1 and abutting against the adding block 41. An elastic block 44 is provided at the matching position of the adding ball 45 and the adding block 41, and a side column 46 installed in the lock core body 1 is provided on the other side of the working marble 31; the side column 46 abuts against the shift block 48, and a concave surface is provided at the abutment position of the shift block 48 and the side column 46; the working marble 31 and the pressure block marble 21 are both clearance-matched with the lock core body 1.

[0046] The adding bead 45 is provided with a notch at the working marble 31, and the adding bead 45 is gap-connected with the working marble 31. The adding block 41 is connected with the adding bead 45 through a connecting body 42 and a cylindrical wedge block 43, and the adding block 41 is gap-matched with the connecting body 42 and the cylindrical wedge block 43. The elastic block 44 is located at the matching position between the cylindrical wedge block 43 and the accelerating block.

[0047] The two ends of the side column 46 are provided with side column compression springs 2 installed on the lock core body 1; the two ends of the side column compression spring 2 are respectively connected to the lock core body 1 and the side column 46; the side of the side column 46 relative to the working marble 31 is provided with a tumbler 4 installed in the lock core body 1, and the tumbler 4 includes a left bolt, a shift block 48 movably installed on the left bolt, an elastic body 49 abutting against the shift block 48, a right bolt connected to the elastic body 49, and a tumbler compression spring 47 abutting against the right bolt and installed in the lock core body 1, the addition ball 31 An unlocking groove 451 is provided near the side column 46, the left bolt extends to a distance from the rotating lock cylinder 13, and a push rod 50 extending to the pressure block 23 is further provided on one side of the left bolt, and the two ends of the push rod 50 are respectively abutted against the pressure block 23 and the left bolt, and a protrusion is provided at the matching position of the left bolt and the push rod 50; the side column 46, the push rod 50 and the tumbler 4 are all slidably matched with the lock core body 1, the unlocking groove 451 is clearance matched with the side column 46, and the protrusion is slidably matched with the push rod 50.

[0048] A method for opening an additive lock cylinder, used to implement the additive lock cylinder, comprising:

[0049] First, before normal unlocking, when the key 12 was pulled out of the lock hole last time, the marble compression spring 25 controlled the pressure block marble 21 to fall back, driving the pressure block 23 to rotate outwards instantly and then reset, and all the addition beads 45 also fell and reset, completing the lock;

[0050] When unlocking the lock, the key 12 enters the lock hole, and the teeth on the key 12 push the pressure block marble 21 in the lock core body 1 to rise. The arc-shaped boss 22 on the pressure block marble 21 changes the running trajectory of the rolling body 24 to make the pressure block 23 rotate. After passing the arc-shaped boss 22, the pressure block 23 is driven to rotate outward instantly and then reset. All the addition beads 45 also fall and reset, completing the initialization of the lock;

[0051] When the key 12 penetrates into the rotating lock cylinder 13 and contacts the working marble 31, the teeth on the key 12 push the working marble 31 in the lock cylinder body 1 to move, causing the working marble 31 to rise. Because the pressure block 23 is under the tight pressure of the pressure block compression spring 26, the side of the working marble 31 drives the cylindrical wedge block 43 to rise, and at the same time drives the addition block 41 and the addition ball 45 to rise, thereby completing the rising process of the teeth of the key 12.

[0052] When the key 12 further enters the lock hole and the first key 12 tooth that contacts the working marble 31 works, the key 12 tooth will descend, and the working marble 31 descends under the action of the working compression spring 32. Since the cylindrical wedge block 43 retracts under the rotation change of the pressure block 23, the descending working marble 31 only slides downward relative to the adding block 41. The adding block 41 cannot descend due to the action of the cylindrical wedge block 43, so that the adding ball 45 completes the ascending process of one key 12 tooth;

[0053] When the key 12 further enters the lock hole and the second tooth on the key 12 contacts the first working marble 31, the adding bead 45 matched with the first working marble 31 completes the process of the previous step again, and the adding bead 45 records the second rising height of the tooth of the key 12 again;

[0054] When the key 12 fully enters the rotary lock cylinder 13, the height change of the key 12 teeth causes the first adding bead 45 to record the rising height of all the key 12 teeth. Since the second adding bead 45 has no working relationship with the last tooth on the key 12, it only records the rising height of the previous key 12 teeth. By analogy, the number of key 12 teeth recorded by the following adding beads 45 becomes less and less.

[0055] When the lock is unlocked with a suitable key 12, the unlocking groove 451 on the adding bead 45 is in the same straight line with the side column 46. When the suitable key 12 completely enters the rotary lock core 13, all the unlocking grooves 451 on the adding bead 45 are in a straight line with the side column 46, and the upper and lower parts of all the working marbles 31 are also in the same line with the joint surface of the inner and outer rotary lock cores 13. The key 12 is turned right to drive the rotary lock core 13 to turn right. The rotary lock core 13 turns right to drive the tumbler 4 to rise, and the side column 46 is pressed into the unlocking groove 451. The rotary lock core 13 rotates under the drive of the key 12, thereby completing the unlocking; the unlocking groove 451 on the adding bead 45 corresponds to the teeth of the key 12 and is set at different heights;

[0056] When the unlocking groove 451 on the adding bead 45 is not in a straight line with the side column 46, and the side column 46 cannot enter the unlocking groove 451, the tumbler 4 cannot rise due to the obstruction of the side column 46, so that the rotary lock cylinder 13 is stuck and cannot rotate; after the appropriate key 12 completely enters the rotary lock cylinder 13, the rotary lock cylinder 13 rotates and drives the tumbler 4 to rise. When the tumbler 4 rises 0.5 mm, the side column 46 is pressed into the unlocking groove 451 by the action of the shifting block 48, and the push rod 50 does not move at this time;

[0057] When the tumbler 4 rises by 1 mm, the side column 46 moves out of the unlocking groove 451 under the action of the side column compression spring 2. At this time, the protrusion of the push rod 50 on the tumbler 4 pushes the pressure block 23 to separate the pressure block 23 from the adder bead 45. Then, due to the concave surface of the shift block 48, the side column 46 is reset to the concave surface direction. At this time, all the adder beads 45 fall back to zero.

[0058] When the key 12 is to be pulled out of the rotary lock cylinder 13, the rotary lock cylinder 13 is first rotated to the starting position, and the tumbler 4 falls under the action of the tumbler compression spring 47. During the falling process, the convex part on the tumbler 4 acts to move the push rod 50, thereby rotating the pressure block 23 outward;

[0059] When the tumbler 4 falls down until the shifting block 48 hits the side column 46, since the unlocking groove 451 of the adding bead 45 is completely reset, the side column 46 cannot move into the unlocking groove 451, and the shifting block 48 can only rotate counterclockwise under the action of the side column 46. When the tumbler 4 is completely reset, the elastic body 49 presses the shifting block 48 to rotate and reset. At this time, all the adding beads 45 return to the starting state, and the key 12 can be pulled out from the key 12 hole of the rotary lock cylinder 13. When the key 12 is pulled out, the adding bead 45 will still move upward, but the key 12 will not be stuck.

[0060] When the key 12 finally leaves the key hole 12, the pressure block marble 21 is controlled to reset, and the marble compression spring 25 controls the arc boss 22 of the pressure block marble 21 so that the rolling body 24 pushes the pressure block 23 to rotate again, and all the addition beads 45 fall back to zero again; the lock core enters the locked state again.

[0061] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. An additive lock cylinder, comprising: A lock core body, a rotary lock core installed in the lock core body, a key inserted into the rotary lock core, and a pressing block assembly and a plurality of adding assemblies installed in the lock core body and abutting against the key; The invention is characterized in that the pressure block assembly comprises a pressure block marble installed in the lock core body and extending to the rotating lock core, a marble pressure spring installed in the lock core body and abutting against the pressure block marble, one side of the pressure block marble is provided with a pressure block installed in the lock core body, one end of the pressure block is rotatably connected to the lock core 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 abutting against the pressure block marble, and the pressure block marble is provided with an arc-shaped boss near the rolling body; Each adding assembly includes a working marble installed in the lock core and extending into the rotating lock core, a working compression spring installed in the lock core and abutting against the working marble, an adding ball sleeved on the working marble, an adding block installed on the adding ball and abutting against the compression block, and a special-shaped compression spring installed in the lock core and abutting against the adding block, an elastic block is provided at the matching position between the adding ball and the adding block, and a side column installed in the lock core is provided on the other side of the working marble; Both ends of the side column are provided with side column compression springs installed on the lock core body; the side column opposite to the working marble is provided with a tumbler installed in the lock core body, the tumbler includes a left bolt, a shift block movably installed on the left bolt, an elastic body abutting the shift block, a right bolt connected to the elastic body, and a tumbler compression spring abutting the right bolt and installed in the lock core body, an unlocking groove is provided at the position of the addition bead close to the side column, the left bolt extends to the rotating lock core for a 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 cooperation between the left bolt and the push rod.

2. The addition lock cylinder according to claim 1, characterized in that: The rotating lock core passes through the lock core body, and several adding components are arranged in sequence and installed in the lock core body. The pressure block assembly is linked with the adding component. The lock core body is provided with a locking nut for tightening the ball compression spring, special-shaped compression spring, side column compression spring and bolt compression spring, and the locking nut is threadedly matched with the lock core body.

3. The addition lock cylinder according to claim 1, characterized in that: The two ends of the push rod are respectively in contact with the pressure block and the left bolt, the side column is in contact with the shift block, and a concave surface is provided at the contact point between the shift block and the side column; the working marble and the pressure block marble are both in clearance fit with the lock core body.

4. The addition lock cylinder according to claim 1, characterized in that: The two ends of the pressure block compression spring are respectively in contact with the pressure block and the stop pin installed in the lock core body, and the two ends of the side column compression spring are respectively connected to the lock core body and the side column; the rolling body is rotatably matched with the pressure block, and the rolling body is in contact with the arc-shaped boss.

5. The addition lock cylinder according to claim 1, characterized in that: The adding bead is provided with a notch at the working marble, the adding bead is gap-connected with the working marble, the adding block is connected with the adding bead through a connecting body and a cylindrical wedge, the adding blocks are gap-matched with the connecting body and the cylindrical wedge, and the elastic block is located at the matching position of the cylindrical wedge and the accelerating block.

6. The addition lock cylinder according to claim 1, characterized in that: The side column, the push rod and the tumbler are all slidably matched with the lock core body, the unlocking groove is gap-matched with the side column, and the protrusion is slidably matched with the push rod.

7. A method for opening an additive lock cylinder, used to implement an additive lock cylinder as described in any one of claims 1 to 6, characterized in that: include: First, before normal unlocking, when the key was pulled out of the lock hole last time, the marble compression spring controlled the marble of the pressure block to fall back, driving the pressure block to rotate outward instantly and then reset, and all the addition beads also fell and reset, completing the lock; When unlocking the lock, the key enters the lock hole, and the teeth on the key push the pressure block marble in the lock core to rise. The arc-shaped boss on the pressure block marble changes the running trajectory of the rolling body to make the pressure block rotate. After passing the arc-shaped boss, the pressure block is driven to rotate outward instantly and then reset. All the addition beads also fall and reset, completing the initialization of the lock; When the key goes deep into the rotating lock cylinder and contacts the working marble, the teeth on the key push the working marble in the lock cylinder to move, causing the working marble to rise. Because the pressure block is under the tight pressure of the pressure block compression spring, the side of the working marble drives the cylindrical wedge block to rise, and at the same time drives the addition block and the addition ball to rise, which is the rising process of the key teeth; When the key further enters the lock hole and the first key tooth in contact with the working marble works, the key tooth will drop, and the working marble drops under the action of the working compression spring. As the cylindrical wedge retracts under the rotation of the pressure block, the working marble drops and slides downward relative to the addition block. The addition block cannot drop due to the action of the cylindrical wedge, so that the addition ball completes the rising process of one key tooth. When the key further enters the keyhole and the second tooth on the key contacts the first working marble, the adding bead that cooperates with the first working marble completes the process of the previous step again, and the adding bead once again records the second rising height of the key tooth; When the key fully enters the rotary lock cylinder, the height change of the key teeth causes the first adding bead to record the rising height of all the key teeth. Since the second adding bead has no working relationship with the last tooth on the key, it only records the rising height of the previous key teeth. And so on, the number of key teeth recorded by the following adding beads becomes less and less. When the appropriate key is fully inserted into the rotary lock cylinder, the unlocking grooves on all the adding beads are in a straight line with the side columns, and the upper and lower parts of all the working marbles are also in line with the joint surface of the inner and outer rotary lock cylinders, the key is turned right, which drives the rotary lock cylinder to turn right, and the right rotation of the rotary lock cylinder drives the tumbler to rise, the side columns are pressed into the unlocking grooves, and the rotary lock cylinder rotates driven by the key, thereby completing the unlocking; When the unlocking groove on the addition bead is not in a straight line with the side column, and the side column cannot enter the unlocking groove, the tumbler cannot rise due to the obstruction of the side column, so that the rotary lock cylinder is stuck and cannot rotate; after the appropriate key completely enters the rotary lock cylinder, the rotary lock cylinder rotates and drives the tumbler to rise. When the tumbler rises 0.5mm, the side column is pressed into the unlocking groove under the action of the shift block, and the push rod does not move at this time; When the tumbler rises 1mm, the side column moves out of the unlocking slot under the action of the side column compression spring. At this time, the protrusion of the push rod on the tumbler pushes the pressure block to separate the pressure block from the addition beads. Then, due to the concave surface of the shift block, the side column resets to the concave surface direction. At this time, all the addition beads fall back to zero. When the key is to be pulled out of the rotary lock cylinder, the rotary lock cylinder is first rotated to the starting position. At this time, the tumbler falls under the action of the tumbler compression spring. During the falling process, the convex part on the tumbler acts to move the push rod, thereby causing the pressure block to rotate outward; When the tumbler falls down until the shifting block hits the side column, the unlocking slot of the adding bead is completely reset, and the side column cannot move into the unlocking slot. The shifting block can only rotate counterclockwise under the action of the side column. When the tumbler is completely reset, the elastic body presses the shifting block to rotate and reset. At this time, all the adding beads return to the starting state, and the key can be pulled out of the keyhole of the rotary lock cylinder. When the key is pulled out, the adding bead will still move upward, but the key will not be stuck. When the key finally leaves the keyhole, the pressure block marble is controlled to reset, and the marble compression spring controls the arc-shaped boss of the pressure block marble to make the rolling body push the pressure block to rotate again, and all the adding beads fall back to zero; the lock cylinder enters the locked state again.

Images