Special-shaped lock cylinder structure, lock cylinder and lock

Abstract

The special-shaped lock cylinder structure comprises a copper body lock shell, an inner lock cylinder is rotationally installed in the copper body lock shell, a plurality of sets of marbles are elastically installed in the inner lock cylinder, and matched marbles are correspondingly and elastically installed at the positions, corresponding to the installation positions of the sets of marbles, in the inner lock cylinder; a key inserting groove is formed in the center of the inner lock cylinder, and a plurality of sets of first side position marbles and second side position marbles are elastically installed at the positions, corresponding to the key inserting groove, in one side of the inner lock cylinder. The multiple sets of first side position marbles and second side position marbles installed on one side in the inner lock cylinder are used for improving the overall unlocking difficulty of the lock cylinder and are different from an upper marble structure and a lower marble structure of a normal lock body, the first side position marbles and the second side position marbles on all the side faces are further matched with the side face of a key, and the overall use safety of the lock body is improved; meanwhile, due to the fact that the structures arranged at the front ends of the first side position marbles and the second side position marbles are different, the use safety of the lock body can be better improved.

Description

Technical Field

[0001] The invention relates to the technical field of special-shaped lock structures, and in particular to a special-shaped lock core structure, a lock core and a lock. Background Art

[0002] Special-shaped locks are locks that are different in shape or structure from conventional locks, and usually have a unique keyhole design to enhance the anti-theft performance. For example, the Tibetan maze lock is a typical special-shaped lock. This lock adopts a special structure and an irregular keyhole design, which makes it impossible to open with ordinary keys, thereby improving the anti-theft performance.

[0003] According to authorization announcement No. CN202882574U, a new type of special-shaped lock core is disclosed, including a copper body lock shell, a lock core, and a lock column. A lock core is arranged in the copper body lock shell, and a lock column is arranged at the lower end of the lock core through a reset pin mechanism; a key hole is arranged in the middle of the lock core; AB marbles are arranged at the bottom of one end of the key hole through a reset pin mechanism, and a lower docking pin is arranged at the bottom of the other end of the key hole through a reset pin mechanism; the lower docking pin is arranged in a lower docking pin hole arranged at the lower end of the lock core; at the same time, an upper docking pin hole is arranged at the upper end of the key hole corresponding to the lower docking pin hole, and an upper docking pin is arranged in the upper docking pin hole; the beneficial effects of the present invention: simple structure and low production cost; at the same time, 68 billion different key number changes are achieved by combining three different special-shaped lock beads with 5 groups of different blade groove structures, so that the key is difficult to copy, has good confidentiality and security, and can effectively prevent technical opening.

[0004] The above-mentioned special-shaped lock core structure only sets different structure pins on the upper and lower sides of the key to complete the encryption work, but the existing technology mostly adopts upper and lower elastic pin structures, which makes the confidentiality of the lock core structure low, and the lock core cannot be freely selected according to specific usage requirements. Therefore, a special-shaped lock core structure, lock core and lock are needed now. Summary of the invention

[0005] The object of the present invention is to provide a special-shaped lock core structure, a lock core and a lock, which ensures that the key is further locked from the side after the key is inserted into the key slot by means of a first side pin and a second side pin movably installed inside the inner lock core corresponding to one side of the key slot, thereby better improving the use strength of the lock body and the safety of the lock body, so as to solve the technical problems mentioned in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: a special-shaped lock core structure, comprising an inner lock core, wherein a plurality of groups of pins are elastically installed inside the inner lock core, and matching pins are elastically installed corresponding to the installation positions of each group of pins inside the inner lock core;

[0007] A key slot is provided at the center of the inner lock core, and a plurality of groups of first side pins and second side pins are elastically installed inside one side of the inner lock core at positions corresponding to the key slot;

[0008] A flat-mouthed abutment block is installed at the front end of the first side-positioned pin, and a pointed-mouthed abutment block is installed at the front end of the second side-positioned pin.

[0009] Preferably, the outer ends of the balls are elastically pressed with I-shaped columns, the outer ends of each group of I-shaped columns are sleeved with a group of support springs for support, and the outer ends of each group of support springs are fitted with a group of limit columns.

[0010] Preferably, each group of the marbles has different specifications, and height-adding columns are provided between some groups of the marbles and the I-shaped columns.

[0011] A lock core comprises an inner lock core, a protective shell is fixedly mounted on the outer end of the inner lock core, an inner groove is formed at the other end of the inner lock core, a positioning groove is formed on the outer arc surface of the inner lock core close to the inner groove, a plurality of groups of upper through holes are formed on the upper part of the outer arc surface of the inner lock core, bottom grooves are formed inside the inner lock core corresponding to the positions of each group of upper through holes, and side holes are formed on the side of the inner lock core.

[0012] Preferably, each group of the pins elastically extends from the upper through-holes to the key slot, each group of the height-complementing columns is placed on the upper part of the shorter pins, each group of the matching pins corresponding to each group of pins of different specifications are movably installed in the bottom groove, and the first side pins and the second side pins are cross-movably installed in the side holes.

[0013] Preferably, the outer end of each group of the first side pins is a conical structure, and two groups of baffles are symmetrically installed on the outer arc surface of the first side pins. The outer arc surface of the baffles is slidably installed in contact with the inner wall of the side hole. The outer end of the second side pin is a truncated cone structure, and the outer arc surface of the second side pin slides in contact with the inner wall of the side hole. The flat-mouthed block and the pointed-mouthed block elastically extend from the inside of the side hole into the inside of the key slot.

[0014] A lock comprises a copper body lock shell, a pin installation hole is formed through the top of the copper body lock shell, a door pin rotation groove is formed in the middle of the copper body lock shell, a group of card slots are formed at both ends of the copper body lock shell, a rotating tube is rotatably installed inside the door pin rotation groove, and a rotating pin is fixedly installed on the outer arc surface of the rotating tube;

[0015] Two sets of inner lock cores are symmetrically mounted on both sides of the copper lock housing, the two sets of inner lock cores rotate in opposite directions, and the corresponding sides of the two sets of inner lock cores are respectively rotated and inserted into the rotating tube;

[0016] Also includes keys.

[0017] Preferably, the protective shell installed on the outer end of the inner lock core is snapped into the slot, the limit column, support spring, I-shaped column and pin are installed in the pin installation hole, the support spring presses the pin out from the pin installation hole, the left and right sides of the rotating tube are symmetrically provided with connecting grooves, the corresponding sides of the two groups of inner lock cores extend into the door pin rotating grooves, are inserted into the connecting grooves and are snap-fitted and installed, a positioning seat is installed in the middle of the rotating tube, and a cross groove is opened through the middle of the positioning seat.

[0018] Preferably, the upper and lower sides of the key are provided with several groups of main tooth grooves in opposite directions, the upper and lower sides of the key are provided with auxiliary tooth grooves corresponding to the elastically mounted pins and matching pins, and the two sides of the key are provided with several groups of side grooves corresponding to each group of first side pins and second side pins.

[0019] Preferably, the installation positions of the first side pin and the second side pin correspond to the pins and the matching pins. After the key is inserted into the key slot, the pins, the matching pins, the first side pins and the second side pins are lifted up. The lifted pins, the matching pins, the first side pins and the second side pins are retracted to the corresponding upper through holes, the bottom grooves and the first side pins, and the end of the key extends from the inner groove and is inserted into the cross groove.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] Several groups of first side pins and second side pins installed on one side of the inner lock core are aimed at increasing the overall difficulty of unlocking the lock core. Different from the upper and lower pin structures of a normal lock body, the first side pins and the second side pins on one side of the inner lock core are further coordinated with the side of the key to improve the overall safety of the lock body. At the same time, due to the different structures set at the front end of the first side pins and the second side pins, the safety of the lock body can be better improved to avoid the unlocking problem caused by the pins inside the lock core being violently pressed in. The inner lock cores set at the same time can be used alone or in combination. When used alone, the door body can only be opened from one side. When used in combination, since the first side pins and the second side pins are set inside the two groups of inner lock cores, encryption is synchronized from both sides of the door to ensure the safety when opening and closing the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the disassembly of the installation structure of the limit column of the present invention;

[0024] Figure 3 This is a schematic diagram of the splitting of the first side pin installation structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the overall structure of the first side-positioned pin of the present invention;

[0026] Figure 5 This is a schematic diagram of the overall structure of the elastic copper body lock shell of the present invention;

[0027] Figure 6 This is a schematic diagram of the splitting of the marble installation structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the disassembly of the rotating tube installation structure of the present invention;

[0029] Figure 8 It is a schematic diagram of the overall structure of the key of the present invention.

[0030] In the figure: 1. Copper lock shell; 2. Inner lock core; 3. Limit column; 4. Support spring; 5. I-shaped column; 6. Pin; 7. Heightening column; 8. Protective shell; 9. Positioning groove; 10. Inner groove; 11. Upper perforation; 12. Matching pin; 13. Side hole; 14. First side pin; 15. Baffle; 16. Flat-mouth block; 17. Second side pin; 18. Pointed-mouth block; 19. Pin installation hole; 20. Door pin rotation groove; 21. Card groove; 22. Rotating tube; 23. Rotating pin; 24. Connecting groove; 25. Positioning seat; 26. Cross groove; 27. Key slot; 28. Key; 29. ​​Main tooth groove; 30. Auxiliary tooth groove; 31. Side groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The present invention provides: a special-shaped lock core structure, such as Figure 1-Figure 7 As shown, it includes an inner lock core 2, and a plurality of groups of pins 6 are elastically installed inside the inner lock core 2. The inner lock core 2 has a plurality of groups of pins 6 installed at corresponding positions. The inner lock core 2 has a plurality of groups of pins 6 installed at corresponding positions. The pins 6 and the matching pins 12 are matched to complete the preliminary lock body structure, so as to meet the encrypted locking state of the door, and make the use of the inner lock core 2 have preliminary safety.

[0033] A key slot 27 is provided at the center of the inner lock core 2, and a plurality of groups of first side pins 14 and second side pins 17 are elastically installed at a position corresponding to the key slot 27 inside one side of the inner lock core 2. The first side pins 14 and second side pins 17 elastically installed at a position corresponding to the key slot 27 inside the inner lock core 2 can further strengthen the use of the lock body to improve the safety of the lock body. Different from the existing lock body, which is unlocked directly by the pins 6 and the matching pins 12, an additional unlocking condition is applied to the key 28 from the side. Moreover, due to the different shapes of the first side pins 14 and the second side pins 17 and the different front end structures of the first side pins 14 and the second side pins 17, the problem of unlocking by directly pressing the pins 6 in the traditional unlocking method when there is no key 28 can be further avoided, thereby better improving the use strength and safety of the inner lock core 2.

[0034] A flat-mouthed stopper 16 is installed at the front end of the first side pin 14, and a pointed-mouthed stopper 18 is installed at the front end of the second side pin 17. The flat-mouthed stopper 16 installed at the outer end of the first side pin 14 and the pointed-mouthed stopper 18 installed at the outer end of the second side pin 17 make the depth and shape of the side groove 31 opened on the side of the key 28 inconsistent, further increasing the difficulty of unlocking without a key 28, thereby ensuring the strength and safety of the lock body.

[0035] Preferably, the outer end of the pin 6 is elastically pressed with an I-shaped column 5, and the outer end of each group of I-shaped columns 5 is sleeved with a group of supporting springs 4 for support, and the outer end of each group of supporting springs 4 is fitted with a group of limiting columns 3. The supporting springs 4 are limited by the set limiting columns 3 to ensure that the supporting springs 4 continuously apply a downward thrust to the pin 6. At the same time, the use strength of the supporting springs 4 is limited by the set limiting columns 3 to avoid deformation and jamming of the supporting springs 4 after being compressed, thereby improving the overall service life of the lock body, and also allowing the pins 6 to have sufficient support to keep their position unchanged when the lock is violently unlocked, thereby improving the stability of the pins 6 when used.

[0036] Furthermore, each group of pins 6 has different specifications, and a height-adding column 7 is provided between several groups of pins 6 and the I-shaped column 5. The pins 6 as a whole are uniformly processed and classified according to different password structures by equipment programming, so that the usage specifications and installation sequence of each group of pins 6 are different. In view of the difference in the lengths of the different pins 6, the I-shaped column 5 and the height-adding column 7 are added between the support spring 4 and the pins 6 to ensure that after the key 28 is inserted into the key slot 27, each group of pins 6 can be stably recovered, avoiding the problem of the pins 6 being stuck during recovery due to different specifications, thereby greatly improving the smoothness of the inner lock core 2 during unlocking.

[0037] A lock cylinder, such as Figure 1-7As shown in the figure, it includes an inner lock core 2, a protective shell 8 is fixedly installed on the outer end of the inner lock core 2, an inner groove 10 is opened at the other end of the inner lock core 2, a positioning groove 9 is opened on the outer arc surface of the inner lock core 2 near the inner groove 10, a plurality of groups of upper perforations 11 are opened on the upper part of the outer arc surface of the inner lock core 2, and a bottom groove is opened inside the inner lock core 2 corresponding to the position of each group of upper perforations 11, and a side hole 13 is opened on the side of the inner lock core 2. The protective shell 8 installed on the outer end of the inner lock core 2 can improve the strength of the outer end of the inner lock core 2 during long-term use to avoid damage to the lock body caused by direct damage to the inner lock core 2 from the outside. At the same time, the inner groove 10 opened at the other end of the inner lock core 2 is provided so that the inner lock core 2 can be docked and inserted into one side of the rotating tube 22, so that the two groups of inner lock cores 2 can be used in combination, and the positioning groove 9 opened on the outer arc surface of the inner lock core 2 can improve the stability of the inner lock core 2 when it is inserted into the rotating tube 22, and improve the stability of the inner lock core 2 and the rotating tube 22 when they rotate in coordination.

[0038] Furthermore, each group of pins 6 elastically extends from the upper through-hole 11 to the key slot 27, each group of height-complementing columns 7 is placed on the upper part of the shorter pins 6, each group of matching pins 12 is movably installed in the bottom groove corresponding to each group of pins 6 of different specifications, the first side pins 14 and the second side pins 17 are cross-movably installed in the side holes 13, and the pins 6 elastically extend from the upper through-hole 11 into the key slot 27 to ensure that the pins 6 can be directly used in the key slot 27 to improve the control of the key 28 over the inner lock core 2. In addition, due to the different specifications of the pins 6, the depths of the auxiliary tooth grooves 30 opened on the surface of the key 28 are also different, and the matching pins 12 corresponding to the pins 6 are cooperated to increase the difficulty of unlocking without the key 28.

[0039] It is worth noting that the outer ends of the first side pins 14 of each group are in a conical structure, and two groups of baffles 15 are symmetrically installed on the outer arc surface of the first side pins 14. The outer arc surface of the baffle 15 fits the inner wall of the side hole 13 and slides. The outer ends of the second side pins 17 are in a truncated cone structure, and the outer arc surface of the second side pins 17 fits the inner wall of the side hole 13 and slides. The flat-mouthed abutment block 16 and the pointed-mouthed abutment block 18 elastically extend from the inside of the side hole 13 to the inside of the key slot 27. The outer ends of the first side pins 14 and the second side pins 17 have different shapes, so that the first side pins 14 and the second side pins 17 are in the key slot 27. The force state of key 28 after insertion is different, and the first side pin 14 ensures the stability of the movement of the first side pin 14 through the fitting state of the baffle 15 and the side hole 13, thereby ensuring that the flat-mouth block 16 can better fit with the side groove 31 to complete the unlocking operation, and the outer end of the second side pin 17 is a truncated cone structure, which makes the overall force movement state of the second side pin 17 slower, and then through the different shapes of the first side pin 14 and the second side pin 17 to change the depth of the side groove 31 opened on the side of the key 28, so as to improve the overall safety of the inner lock core 2.

[0040] A lock such as Figure 1-8 As shown in the figure, it includes a copper body lock shell 1, a pin installation hole 19 is opened through the top of the copper body lock shell 1, a door pin rotation groove 20 is opened in the middle of the copper body lock shell 1, and a group of card slots 21 are opened at both ends of the copper body lock shell 1. A rotating tube 22 is rotatably installed inside the door pin rotation groove 20, and a rotating pin 23 is fixedly installed on the outer arc surface of the rotating tube 22. The copper body lock shell 1 is set to ensure that two groups of inner lock cores 2 can be used synchronously, so that the inner lock core 2 can be used for doors that need to be opened in both directions, further improving the safety and diversity of the overall use of the inner lock core 2, and the door pin rotation groove 20 opened in the middle of the copper body lock shell 1 limits the rotating tube 22, so that the inner lock cores 2 on both sides can be operated to unlock;

[0041] Two sets of inner lock cores 2 are symmetrically rotated and installed on both sides of the copper body lock shell 1. The two sets of inner lock cores 2 rotate in opposite directions. The corresponding sides of the two sets of inner lock cores 2 are respectively rotated and inserted into the rotating tube 22. The inner lock cores 2 on both sides of the copper body lock shell 1 have the same structure but are installed in opposite directions. When unlocking, the operation direction is consistent, which strengthens the use habits of the door lock and improves the comfort of using the door lock.

[0042] A key 28 is also included.

[0043] Specifically, the protective shell 8 installed at the outer end of the inner lock core 2 is inserted into the card slot 21, the limit column 3, the support spring 4, the I-shaped column 5 and the pin 6 are installed in the pin installation hole 19, the support spring 4 presses the pin 6 out of the pin installation hole 19, and the left and right sides of the rotating tube 22 are symmetrically provided with connecting grooves 24. The corresponding sides of the two groups of inner lock cores 2 extend into the door pin rotating groove 20 and are inserted into the connecting grooves 24 for card installation. A positioning seat 25 is installed in the middle of the rotating tube 22, and the middle of the positioning seat 25 A cross groove 26 is provided throughout, and a pin mounting hole 19 provided inside the copper lock shell 1 limits the limiting column 3, the supporting spring 4, the I-shaped column 5 and the pin 6, so that the pin 6 can be stably received inside the pin mounting hole 19 after the key 28 is inserted, and the rotating tube 22 can stably connect the two groups of inner lock cores 2, so that the key 28 can be inserted into the rotating tube 22 after being fully inserted into the key slot 27, until the key 28 contacts with the cross groove 26, so as to realize the control of the rotating tube 22.

[0044] In addition, a plurality of groups of main tooth grooves 29 are provided in opposite directions on the upper and lower sides of the key 28, auxiliary tooth grooves 30 are provided on the upper and lower sides of the key 28 corresponding to the elastically mounted pins 6 and the matching pins 12, and a plurality of groups of side grooves 31 are provided on both sides of the key 28 corresponding to each group of first side pins 14 and second side pins 17. The main tooth grooves 29, auxiliary tooth grooves 30 and side grooves 31 of the key 28 corresponding to the pins 6, matching pins 12, first side pins 14 and second side pins 17 are symmetrically provided, so that the key 28 can be used regardless of the direction in which it is inserted into the inner lock core 2 on either side, and the side grooves 31 provided on the side of the key 28 serve as an encryption structure used in conjunction with the first side pins 14 and the second side pins 17, thereby better improving the safety of the overall use of the lock body.

[0045] Preferably, the installation position of the first side pin 14 and the second side pin 17 corresponds to between the pin 6 and the matching pin 12. After the key 28 is inserted into the key slot 27, the pin 6, the matching pin 12, the first side pin 14 and the second side pin 17 are lifted up, and the lifted pin 6, the matching pin 12, the first side pin 14 and the second side pin 17 are retracted to the corresponding upper through-hole 11, the bottom groove and the first side pin 14. The end of the key 28 extends from the inner groove 10 and is inserted into the cross groove 26. After the key 28 pushes each group of pins 6, the matching pin 12, the first side pin 14 and the second side pin 17 into the corresponding holes, it extends into the rotating tube 22. The key 28 is inserted into the cross groove 26 to complete the control of the use position of the rotating pin 23, thereby improving the switch and locking operation of the door lock, and greatly improving the safety of the use of the inner lock core 2.

[0046] Specific usage:

[0047] The inner lock core 2 as a whole can be used independently or in combination according to specific usage requirements. A group of first side pins 14 and second side pins 17 are mainly added inside the inner lock core 2 to further encrypt the side of the key 28. The difference in the overall state of the first side pin 14 and the second side pin 17 and the difference in the outer end structure of the first side pin 14 and the second side pin 17 can increase the difficulty of unlocking the door without the key 28, thereby greatly improving the safety of the door lock and avoiding the unlocking problem caused by the door lock directly contacting the pin 6 in the traditional way during the keyless unlocking process.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special-shaped lock core structure, characterized in that: It comprises an inner lock core (2), wherein a plurality of groups of pins (6) are elastically mounted inside the inner lock core (2), and matching pins (12) are elastically mounted corresponding to the mounting positions of each group of pins (6) inside the inner lock core (2); A key slot (27) is provided at the center of the inner lock core (2), and a plurality of groups of first side pins (14) and second side pins (17) are elastically mounted inside one side of the inner lock core (2) at positions corresponding to the key slot (27); A flat-mouthed stopper (16) is installed at the front end of the first side-positioned pin (14), and a pointed-mouthed stopper (18) is installed at the front end of the second side-positioned pin (17).

2. The special-shaped lock core structure according to claim 1, characterized in that: The outer ends of the balls (6) are elastically pressed with I-shaped columns (5), the outer ends of each group of I-shaped columns (5) are sleeved with a group of supporting springs (4) for support, and the outer ends of each group of supporting springs (4) are fitted with a group of limiting columns (3).

3. The special-shaped lock core structure according to claim 2, characterized in that: Each group of the marbles (6) has different specifications, and a height-enhancing column (7) is arranged between several groups of the marbles (6) and the I-shaped columns (5).

4. A lock core, characterized in that: The utility model comprises an inner lock core (2), wherein a protective shell (8) is fixedly mounted on the outer end of the inner lock core (2), an inner groove (10) is provided on the other end of the inner lock core (2), a positioning groove (9) is provided on the outer arc surface of the inner lock core (2) close to the inner groove (10), a plurality of groups of upper through holes (11) are provided on the upper part of the outer arc surface of the inner lock core (2), bottom grooves are provided inside the inner lock core (2) corresponding to the positions of each group of upper through holes (11), and a side hole (13) is provided on the side of the inner lock core (2).

5. A lock core according to claim 4, characterized in that: Each group of the pins (6) elastically extends from the upper through hole (11) to the key slot (27), each group of the height-filling columns (7) is placed on the upper part of the shorter pins (6), each group of the matching pins (12) is movably installed in the bottom groove corresponding to each group of pins (6) of different specifications, and the first side pins (14) and the second side pins (17) are cross-movably installed in the side holes (13).

6. A lock core according to claim 5, characterized in that: The outer end of each group of the first side pins (14) is in a conical structure, and two groups of baffles (15) are symmetrically mounted on the outer arc surface of the first side pins (14). The outer arc surface of the baffles (15) fits the inner wall of the side hole (13) and is slidably mounted. The outer end of the second side pins (17) is in a truncated cone structure, and the outer arc surface of the second side pins (17) fits the inner wall of the side hole (13) and slides. The flat-mouthed abutment block (16) and the pointed-mouthed abutment block (18) elastically extend from the inside of the side hole (13) into the inside of the key slot (27).

7. A lock, characterized in that: The invention comprises a copper lock shell (1), wherein a pin installation hole (19) is provided through the top of the copper lock shell (1), a door pin rotation groove (20) is provided in the middle of the copper lock shell (1), a group of clamping grooves (21) are provided at both ends of the copper lock shell (1), a rotating tube (22) is rotatably installed inside the door pin rotation groove (20), and a rotating pin (23) is fixedly installed on the outer arc surface of the rotating tube (22); Two groups of inner lock cores (2) are symmetrically rotatably mounted on both sides of the copper lock housing (1), the two groups of inner lock cores (2) rotate in opposite directions, and the corresponding sides of the two groups of inner lock cores (2) are respectively rotated and inserted into the interior of the rotating tube (22); A key (28) is also included.

8. A lock according to claim 7, characterized in that: The protective shell (8) installed at the outer end of the inner lock core (2) is inserted into the card slot (21), and the limit column (3), the support spring (4), the I-shaped column (5) and the pin (6) are installed in the pin installation hole (19). The support spring (4) presses the pin (6) out of the pin installation hole (19). The left and right sides of the rotating tube (22) are symmetrically provided with connecting grooves (24). The corresponding sides of the two groups of the inner lock cores (2) extend into the door pin rotating groove (20) and are inserted into the connecting grooves (24) for card connection and installation. A positioning seat (25) is installed in the middle of the rotating tube (22), and a cross groove (26) is opened through the middle of the positioning seat (25).

9. A lock according to claim 8, characterized in that: The key (28) has a plurality of groups of main tooth grooves (29) formed in opposite directions on the upper and lower sides, and auxiliary tooth grooves (30) formed on the upper and lower sides of the key (28) corresponding to the elastically mounted pins (6) and the matching pins (12), and a plurality of groups of side grooves (31) formed on both sides of the key (28) corresponding to the respective groups of first side pins (14) and second side pins (17).

10. A lock according to claim 9, characterized in that: The installation positions of the first side pin (14) and the second side pin (17) correspond to between the pin (6) and the matching pin (12); after the key (28) is inserted into the key slot (27), the pin (6), the matching pin (12), the first side pin (14) and the second side pin (17) are lifted up; the lifted up pin (6), the matching pin (12), the first side pin (14) and the second side pin (17) are retracted to the corresponding upper through hole (11), the bottom groove and the first side pin (14); and the end of the key (28) extends from the inner groove (10) and is inserted into the cross groove (26).

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