Child-proof lock core and lock

Abstract

The present invention discloses a child-proof lock cylinder and lock, comprising a main lock cylinder installed on the outside of the door and opened by a key, and an anti-reverse locking lock cylinder installed inside the door for use with the main lock cylinder; an inner rod is applied with an outward thrust by a connecting spring to separate the movable column as a whole from contact with the positioning lock cylinder, thereby better preventing children from directly turning the rotating handle from indoors to operate the door lock, and in addition, since the limiting corrugated groove provided at the rear end of the positioning lock cylinder and the docking corrugated groove provided at the front end of the movable column are in a meshing relationship, the rotating handle can be better enabled to be rotated directly from indoors for operation, further avoiding the indoor reverse locking problem caused by children's accidental operation; in addition, the key can be rotated from the outside to drive the connecting column to be rotated by the external thread to move, so that family members outside can complete the meshing of the movable column and the positioning lock cylinder by turning the key, thereby opening the reverse locked door lock from the outside, thereby further improving the safety of the door lock.

Description

Technical Field

[0001] The present invention relates to the field of door locks, in particular to a child-proof lock core and a lock. Background Art

[0002] Door locks are typically equipped with a reverse locking mechanism to enhance security. In most cases, a reverse locking mechanism prevents the door from being opened, even with a key. However, children and other emotionally unstable and active individuals may accidentally lock the door when emotionally unstable, preventing parents from entering the room quickly even with a key.

[0003] According to the authorization announcement number CN 216142553 U, a child-proof lock mechanism and a door lock are disclosed, which are used to solve the problem of accidental locking. The child-proof lock mechanism provided by the utility model includes: a limiter, which is connected to the anti-lock knob of the door lock; a limiter groove, which is detachably connected to the limiter, and the limiter groove is provided on the fixed part of the door lock, and the fixed part of the door lock is connected to the anti-lock knob. The anti-lock knob is not easy to turn at the first time, which can prevent users, especially children, from locking the door in an excited state, effectively preventing them.

[0004] The above patent only says that a limit component is added to prevent the door lock from being locked. It cannot directly prevent children from controlling the door lock, which reduces the overall anti-error status of the door lock. Therefore, a child-proof lock core and lock are needed. Summary of the Invention

[0005] The purpose of the present invention is to provide a child-proof lock cylinder and lock, which ensures that children cannot directly operate the handle from indoors to cause reverse locking through the coordinated use of the positioning lock cylinder and the movable column, so as to solve the technical problems mentioned in the background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a child-proof lock cylinder and lock, comprising a main lock cylinder installed on the outside of the door interior and opened with a key, and an anti-reverse locking lock cylinder installed on the inside of the door and used in conjunction with the main lock cylinder;

[0007] The main lock core includes a lock core shell, a force-bearing column is rotatably installed inside the end of the lock core shell, and a second positioning plate is fixedly installed at the end of the force-bearing column;

[0008] The anti-reverse locking lock core includes a positioning lock core, an inner plug hole is provided in the positioning lock core, a cross groove is provided in the inner plug hole, an inner rod is inserted in the inner plug hole, a first positioning plate is fixedly installed at the front end of the inner rod, a connecting spring is fixedly installed at the front end of the first positioning plate, the first positioning plate and the connecting spring are rotatably installed in contact with the inner wall of the inner plug hole, and a limited corrugated groove is provided at the rear end of the positioning lock core;

[0009] The second positioning plate is inserted into the cross slot provided inside the inner insertion hole, the connecting spring is sleeved on the outside of the second positioning plate, and the front end of the connecting spring is fixedly mounted on the surface of the second positioning plate;

[0010] The anti-reverse locking lock core also includes a movable column movably installed on the rear side of the positioning lock core, a docking corrugated groove is opened at the front end of the movable column, a connecting column is fixedly installed at the end of the movable column, and a rotating handle is locked and installed at the rear end of the connecting column, and the inner rod passes through the positioning lock core and the movable column and is threadedly connected to the rotating handle.

[0011] Preferably, a key slot is provided inside the lock core shell, a limit hole such as a stem group is provided through the outer arc surface of the lock core shell, a sealing rubber gasket is installed on one end of the outer arc surface of the lock core shell, a first connecting groove is provided at the other end of the outer arc surface of the lock core shell, and a rotating inner groove is provided inside the lock core shell corresponding to one end of the first connecting groove.

[0012] Preferably, the force-bearing column is inserted into the rotating inner groove for installation, and a key slot is provided on one side of the force-bearing column corresponding to the key slot.

[0013] Preferably, a sliding groove is provided on the outer arc surface of the positioning lock core, and a second connecting groove is provided on the outer arc surface of the positioning lock core on one side of the sliding groove. A group of arc-shaped lock buckles are respectively clamped and installed inside the first connecting groove and the second connecting groove. The inner rod fits the inner wall of the hole at the rear end of the positioning lock core, the outer arc surface of the inner rod is provided with an external thread, and the rear end of the inner rod is provided with an internal thread.

[0014] Preferably, a connecting column is installed at the rear end of the docking corrugated groove, a connecting hole is opened on the outer arc surface of the connecting column, and an inner hole is opened through the docking corrugated groove and the connecting column.

[0015] Preferably, a connecting sleeve is fixedly installed at the front end of the rotating handle, the connecting column extends into the connecting sleeve, and the inner rod extends from the inside of the connecting column and is threadedly connected to the connecting sleeve, the connecting sleeve and the connecting column are locked and connected by a locking cap, and the bottom end of the locking cap is locked inside the connecting hole.

[0016] The lock includes a door lock shell, a limiting groove is provided in the middle of the door lock shell, and lock core positioning tubes are provided on both sides of the limiting groove corresponding to the main lock core and the anti-reverse locking lock core. The main lock core and the anti-reverse locking lock core are respectively installed in the lock core positioning tube on one side, and a plurality of groups of spring column limiting holes are provided on the outer surface of the door lock shell corresponding to the main lock core, and a positioning hole is provided on the outer surface of the door lock shell corresponding to the reverse locking lock core.

[0017] Preferably, a group of positioning beads are installed inside the elastic column limiting hole and the positioning hole respectively, and a group of supporting springs are clamped at the bottom of each group of positioning beads. The bottom end of the supporting spring inside the elastic column limiting hole is clamped with a marble, and the bottom end of the supporting spring inside the positioning hole is clamped with a limiting ball.

[0018] Preferably, the limiting ball moves through the positioning hole and is pressed against the inside of the slide groove. Each group of marbles elastically extends from the inside of the elastic column limiting hole, passes through the limiting hole and extends into the key slot. The specifications of the marbles in each group are different, and each group of marbles of different specifications is provided with a different specification of I-shaped column on the top.

[0019] Preferably, a synchronous connecting seat is rotatable inside the limiting groove, and a limiting inner groove is provided inside the synchronous connecting seat. A rotating door pin is fixedly installed on the outer arc surface of the synchronous connecting seat corresponding to the limiting groove, and the second positioning plate extends from the inside of the limiting inner groove, and the second positioning plate is installed in contact with the inner wall of the limiting inner groove. The corresponding end faces of the lock core shell and the positioning lock core are respectively inserted into the two ends of the synchronous connecting seat, and the arc-shaped lock buckle installed by the lock core shell and the outer arc surface is clamped into the corresponding limiting inner groove.

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

[0021] The inner rod is pushed outward by a connecting spring, so that the movable column is separated from the contact with the positioning lock cylinder as a whole, thereby better preventing children from directly turning the rotating handle to operate the door lock from indoors. In addition, since the limiting corrugated groove at the rear end of the positioning lock cylinder and the docking corrugated groove at the front end of the movable column are in an engaged relationship, the rotating handle can be better turned and operated directly from indoors, further avoiding the problem of indoor locking caused by children's accidental operation, thereby improving the safety of door lock use;

[0022] In addition, the key can be rotated from the outside to drive the connecting column to move due to the rotation of the external thread, so that family members outside can complete the engagement of the movable column and the positioning lock cylinder by turning the key, thereby opening the locked door lock from the outside, so that even if the door lock is accidentally locked by a child from indoors, the door can be safely opened, further improving the safety of the door lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the planed structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the splitting of the load-bearing column installation structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the overall disassembly of the door lock housing of the present invention;

[0028] Figure 6 This is a schematic diagram of the disassembly of the movable column installation structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the position-limiting corrugated groove of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the rotating inner groove of the present invention.

[0031] In the figure: 1. Door lock housing; 2. Limiting groove; 3. Lock core positioning tube; 4. Spring limiting hole; 5. Positioning hole; 6. Positioning ball; 7. Support spring; 8. Limiting ball; 9. Ball; 10. Synchronous connecting seat; 11. Limiting inner groove; 12. Rotating door pin; 13. Lock core housing; 14. Limiting hole; 15. Sealing pad; 16. First connecting groove; 17. Rotating inner groove; 18. Positioning lock core; 19. Slide groove; 20. Second Connecting groove; 21. Internal socket; 22. Internal rod; 23. External thread; 24. First positioning plate; 25. Connecting spring; 26. Internal thread; 27. Limiting corrugated groove; 28. Movable column; 29. ​​Docking corrugated groove; 30. Internal hole; 31. Connecting column; 32. Connecting hole; 33. Rotating handle; 34. Connecting sleeve; 35. Locking cap; 36. Load-bearing column; 37. Key slot; 38. Second positioning plate; 39. Arc-shaped lock buckle. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0033] The present invention provides: a child-proof lock core and a lock, such as Figures 1-8 As shown, it includes a main lock cylinder installed on the outside of the door and opened with a key, and an anti-reverse lock cylinder installed inside the door for use with the main lock cylinder. The main lock cylinder is installed on the outside of the door and needs to be opened with a key. The lock cylinder housing 13 is synchronously connected with the positioning lock cylinder 18. Use can ensure the opening of the entire door body, while the inside of the door is reversed by turning the handle. Unlike a normal lock body, a single rotation of the rotation handle 33 cannot ensure its normal unlocking. The movable column 28 is subjected to an outward force as a whole through the force of the connecting spring 25 and the inner rod 22. At the same time, the rotation handle 33 needs to be rotated to make the movable column 28 engage with the positioning lock cylinder 18 before the door lock can be rotated from the inside, thereby preventing children from reversely locking the door lock from the inside during use.

[0034] The main lock core includes a lock core housing 13, a force-bearing column 36 is rotatably installed at the end of the lock core housing 13, and a second positioning plate 38 is fixedly installed at the end of the force-bearing column 36. The force-bearing column 36 is rotated when the key is fully inserted, thereby controlling the rotating door pin 12 to rotate out of or into the door lock housing 1, thereby completing the opening and locking of the door lock housing 1. In addition, the second positioning plate 38 passes through the limiting inner groove 11 opened in the synchronous connecting seat 10 and is inserted into the positioning lock core 18, thereby achieving the synchronous use of the lock core housing 13 and the positioning lock core 18. The positioning lock core 18 and the movable column 28 are separated because the force of the connecting spring 25 is separated, so the rotating handle 33 cannot be rotated from the inside.

[0035] The anti-reverse lock core includes a positioning lock core 18, an inner plug hole 21 is opened inside the positioning lock core 18, a cross groove is opened inside the inner plug hole 21, an inner rod 22 is inserted into the inner plug hole 21, a first positioning plate 24 is fixedly installed at the front end of the inner rod 22, a connecting spring 25 is fixedly installed at the front end of the first positioning plate 24, the first positioning plate 24 and the connecting spring 25 are rotatably installed in contact with the inner wall of the inner plug hole 21, a limited corrugated groove 27 is opened at the rear end of the positioning lock core 18, and the cross groove opened inside the inner plug hole 21 is used to connect with the movable column 28 , so that the user can synchronize the main lock cylinder and the anti-reverse lock cylinder by rotating the lock cylinder housing 13. The connecting spring 25 installed at the front end of the inner rod 22 pushes the inner rod 22 so that the inner rod 22 presses the rotating handle 33 outward. Children cannot operate the door lock by directly rotating the rotating handle 33 in the house, further improving the safety of the door lock. The supporting force of the connecting spring 25 and the meshing positioning lock cylinder 18 and the movable column 28 can make it difficult to operate the door lock from the inside, preventing children from locking the door from the inside.

[0036] The second positioning plate 38 is inserted into the cross groove provided inside the inner insertion hole 21, and the connecting spring 25 is sleeved on the outside of the second positioning plate 38, and the front end of the connecting spring 25 is fixedly mounted on the surface of the second positioning plate 38. The second positioning plate 38 is connected to the connecting spring 25, further ensuring the synchronization and stability of the lock cylinder.

[0037] The anti-reverse locking lock core also includes a movable column 28 movably mounted on the rear side of the positioning lock core 18, a docking corrugated groove 29 is provided at the front end of the movable column 28, a connecting column 31 is fixedly mounted on the end of the movable column 28, and a rotating handle 33 is locked and installed at the rear end of the connecting column 31, the inner rod 22 passes through the positioning lock core 18 and the movable column 28 and is threadedly connected to the rotating handle 33, the limiting corrugated groove 27 opened at the rear end of the positioning lock core 18 is engaged with the docking corrugated groove 29 opened on the rear side of the movable column 28 to ensure the stability of the engagement of the anti-reverse locking lock core and at the same time increase the difficulty of rotating the lock core from the inside.

[0038] Preferably, a key slot is provided inside the lock cylinder shell 13, and a limit hole 14 is provided on the outer arc surface of the lock cylinder shell 13. A sealing gasket 15 is installed on one end of the outer arc surface of the lock cylinder shell 13, and a first connecting groove 16 is provided on the other end of the outer arc surface of the lock cylinder shell 13. A rotating inner groove 17 is provided on one end of the lock cylinder shell 13 corresponding to the first connecting groove 16. The key slot provided inside the lock cylinder shell 13 is used in conjunction with the key slot 37 provided inside the force column 36, so that the key can drive the force column 36 to rotate after being inserted into the main lock cylinder for use, thereby ensuring that the synchronous connecting seat 10 as a whole rotates with the rotation of the force column 36, thereby ensuring the normal use and opening of the door lock.

[0039] Furthermore, the force-bearing column 36 is inserted into the rotating inner groove 17 for installation, and a key slot 37 is provided on one side of the force-bearing column 36 corresponding to the key slot. The force-bearing column 36 is inserted so that it can be used internally, which can ensure that it is reversed by the force of the connecting spring 25 after rotation, so as to avoid the key being directly inserted into the key slot 37 to directly drive the rotating door pin 12 to rotate and complete the unlocking of the door lock.

[0040] The outer arc surface of the positioning lock cylinder 18 is provided with a slide groove 19, and the outer arc surface of the positioning lock cylinder 18 is provided with a second connecting groove 20 on one side of the slide groove 19. A set of arc-shaped lock buckles 39 are respectively clamped and installed inside the first connecting groove 16 and the second connecting groove 20. The inner rod 22 is fitted with the inner wall of the rear end hole of the positioning lock cylinder 18, and the outer arc surface of the inner rod 22 is provided with an external thread 23. The rear end of the inner rod 22 is provided with an internal thread 26. The slide groove 19 provided on the outer arc surface of the positioning lock cylinder 18 cooperates with the limit ball 8 to better complete the locking of the positioning lock cylinder 18 rotation, further avoiding children from controlling the door lock from indoors, thereby improving the overall safety of the door lock. The arc-shaped lock buckle 39 is used to limit the use position of the lock cylinder housing 13 and the positioning lock cylinder 18, so that the lock cylinder housing 13 and the positioning lock cylinder 18 can be stably connected to the inside of the synchronous connecting seat 10, which can better enable outdoor family members to control the lock cylinder state by using a key, thereby controlling the unlocking when the door is locked indoors, thereby improving the safety after opening the door.

[0041] It is worth mentioning that a connecting column 31 is installed at the rear end of the docking corrugated groove 29, and a connecting hole 32 is opened on the outer arc surface of the connecting column 31. An inner hole 30 is opened through the docking corrugated groove 29 and the connecting column 31. The connecting column 31 installed at the rear end of the docking corrugated groove 29 is plugged into the connecting sleeve 34, thereby fixing the use position of the rotating handle 33, and the connecting column 31 is threadedly connected to the external thread 23 to ensure that when the lock core is rotated outdoors, the external thread 23 can drive the connecting column 31 to move, thereby pushing the movable column 28 to engage with the positioning lock core 18, completing the control of the door lock and improving the safety of the door lock.

[0042] Specifically, a connecting sleeve 34 is fixedly installed at the front end of the rotating handle 33, the connecting column 31 extends into the connecting sleeve 34, and the inner rod 22 extends from the inside of the connecting column 31 and is threadedly connected to the connecting sleeve 34. The connecting sleeve 34 and the connecting column 31 are locked and connected by a locking cap 35, and the bottom end of the locking cap 35 is locked inside the connecting hole 32. The inner rod 22 is inserted into the connecting sleeve 34 to further improve the controllability of the rotating handle 33 by outdoor personnel to ensure the safety of the door lock.

[0043] Lock, such as Figure 1 and Figure 3 , including a door lock shell 1, a limiting groove 2 is provided in the middle of the door lock shell 1, and the door lock shell 1 is provided with lock core positioning tubes 3 on both sides of the limiting groove 2 corresponding to the main lock core and the anti-reverse lock core. The main lock core and the anti-reverse lock core are respectively installed in the lock core positioning tube 3 on one side, and a plurality of groups of spring limiting holes 4 are provided on the outer surface of the door lock shell 1 corresponding to the main lock core, and a positioning hole 5 is provided on the outer surface of the door lock shell 1 corresponding to the reverse lock core. The limiting groove 2 opened in the middle of the door lock shell 1 is synchronously connected to the seat 10 for limiting, thereby ensuring the controllable use of the main lock core and the anti-reverse lock core, and the spring limiting holes 4 and positioning holes 5 opened on the outer surface of the door lock shell 1 are used to install marbles 9 and limiting balls 8 for the corresponding main lock core and the anti-reverse lock core, which respectively limit the key and the rotating handle 33, thereby improving the overall safety of the door lock.

[0044] Preferably, a group of positioning beads 6 are respectively installed inside the elastic column limiting hole 4 and the positioning hole 5, and a group of supporting springs 7 are clamped at the bottom of each group of positioning beads 6. The bottom end of the supporting spring 7 inside the elastic column limiting hole 4 is clamped with a marble 9, and the bottom end of the supporting spring 7 inside the positioning hole 5 is clamped with a limiting ball 8. The provided positioning beads 6 complete the support of the supporting spring 7, and the provided support spring 7 can provide limiting support to the marble 9 and the limiting ball 8 respectively, ensuring the recovery of the marble 9 after the key is inserted, so that the main lock core can be rotated. After the child turns the handle 33 indoors, the limiting ball 8 further limits the rotation of the anti-reverse lock core to reduce the risk of reverse locking.

[0045] Furthermore, the limiting ball 8 moves through the positioning hole 5 and is pressed against the inside of the slide groove 19. Each group of marbles 9 elastically extends from the inside of the column limiting hole 4, passes through the limiting hole 14 and extends into the key slot. The specifications used in each group of marbles 9 are different, and each group of marbles 9 of different specifications is provided with a different specification of I-shaped columns on the top. The set marbles 9 are processed into shapes of different specifications through a processing procedure. While improving the safety of the lock body, they cooperate with the I-shaped columns of different specifications to ensure that each group of marbles 9 can be lifted up after the key is inserted so that the main lock core can rotate stably.

[0046] Furthermore, a synchronous connection seat 10 is rotated inside the limit groove 2, and a limited inner groove 11 is opened inside the synchronous connection seat 10. A rotating door pin 12 is fixedly installed on the outer arc surface of the synchronous connection seat 10 corresponding to the limit groove 2. The second positioning plate 38 extends from the inside of the limit inner groove 11, and the second positioning plate 38 is installed in contact with the inner wall of the limit inner groove 11. The corresponding end faces of the lock core shell 13 and the positioning lock core 18 are respectively inserted into the two ends of the synchronous connection seat 10, and the lock core shell 13 and the outer arc surface are snap-fitted with the arc lock buckle installed. 39 is inserted into the corresponding limiting inner groove 11, and the lock core shell 13 and the positioning lock core 18 are installed in the limiting inner groove 11 at both ends of the synchronous connecting seat 10 through the arc lock buckle 39, so that the main lock core and the anti-reverse lock core can be used synchronously to improve the overall stability of the door lock. When the door is reversed by rotating the handle 33 indoors, it is independent, and when the door is unlocked outdoors by the key, the anti-reverse lock core can be synchronously controlled by rotating the inner rod 22, so as to improve the safety of unlocking the door after reverse locking.

[0047] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A child-proof lock cylinder, characterized by: It includes a main lock cylinder installed on the outside of the door and opened with a key, and an anti-reverse lock cylinder installed on the inside of the door for use with the main lock cylinder; The main lock core includes a lock core housing (13), a force-bearing column (36) is rotatably mounted inside the end of the lock core housing (13), and a second positioning plate (38) is fixedly mounted at the end of the force-bearing column (36); The anti-reverse locking lock core comprises a positioning lock core (18), an inner plug hole (21) is provided inside the positioning lock core (18), a cross groove is provided inside the inner plug hole (21), an inner rod (22) is inserted inside the inner plug hole (21), a first positioning plate (24) is fixedly installed at the front end of the inner rod (22), a connecting spring (25) is fixedly installed at the front end of the first positioning plate (24), the first positioning plate (24) and the connecting spring (25) are rotatably installed in contact with the inner wall of the inner plug hole (21), and a limiting corrugated groove (27) is provided at the rear end of the positioning lock core (18); The second positioning plate (38) is inserted into the cross slot provided inside the inner insertion hole (21), the connecting spring (25) is sleeved on the outside of the second positioning plate (38), and the front end of the connecting spring (25) is fixedly mounted on the surface of the second positioning plate (38); The anti-reverse locking cylinder further comprises a movable column (28) movably mounted on the rear side of the positioning lock cylinder (18), a docking corrugated groove (29) being provided at the front end of the movable column (28), a connecting column (31) being fixedly mounted at the end of the movable column (28), and a rotating handle (33) being locked and mounted at the rear end of the connecting column (31), and the inner rod (22) passing through the positioning lock cylinder (18) and the movable column (28) and being threadedly connected to the rotating handle (33).

2. A child-proof lock cylinder according to claim 1, characterized in that: A key slot is provided inside the lock core shell (13), a limit hole (14) is provided through the outer arc surface of the lock core shell (13), a sealing rubber pad (15) is sleeved and installed at one end of the outer arc surface of the lock core shell (13), a first connecting groove (16) is provided at the other end of the outer arc surface of the lock core shell (13), and a rotating inner groove (17) is provided inside the lock core shell (13) at one end corresponding to the first connecting groove (16).

3. A child-proof lock cylinder according to claim 2, characterized in that: The stress-bearing column (36) is inserted into the interior of the rotating inner groove (17) for installation, and a key slot (37) is provided on one side of the stress-bearing column (36) corresponding to the key slot.

4. A child-proof lock cylinder according to claim 3, characterized in that: The outer arc surface of the positioning lock core (18) is provided with a slide groove (19), and the outer arc surface of the positioning lock core (18) is provided with a second connecting groove (20) on one side of the slide groove (19). A group of arc-shaped lock buckles (39) are respectively mounted inside the first connecting groove (16) and the second connecting groove (20). The inner rod (22) fits the inner wall of the rear end hole of the positioning lock core (18), the outer arc surface of the inner rod (22) is provided with an external thread (23), and the rear end of the inner rod (22) is provided with an internal thread (26).

5. The child-proof lock cylinder according to claim 4, characterized in that: A connecting column (31) is installed at the rear end of the docking corrugated groove (29), a connecting hole (32) is opened on the outer arc surface of the connecting column (31), and an inner hole (30) is opened through the inside of the docking corrugated groove (29) and the connecting column (31).

6. The child-proof lock cylinder according to claim 5, characterized in that: A connecting sleeve (34) is fixedly mounted on the front end of the rotating handle (33), the connecting column (31) extends into the interior of the connecting sleeve (34), and the inner rod (22) extends from the interior of the connecting column (31) and is threadedly connected to the connecting sleeve (34), the connecting sleeve (34) and the connecting column (31) are locked and connected by a locking cap (35), and the bottom end of the locking cap (35) is locked inside the connecting hole (32).

7. A lock adopting the child-proof lock cylinder according to any one of claims 1 to 6, characterized in that: The invention also includes a door lock shell (1), wherein a limiting groove (2) is provided in the middle of the door lock shell (1), and lock core positioning tubes (3) are provided on both sides of the limiting groove (2) corresponding to the main lock core and the anti-reverse locking lock core, respectively. The main lock core and the anti-reverse locking lock core are respectively installed inside the lock core positioning tube (3) on one side, and a plurality of groups of spring column limiting holes (4) are provided on the outer surface of the door lock shell (1) corresponding to the main lock core, and a positioning hole (5) is provided on the outer surface of the door lock shell (1) corresponding to the reverse locking lock core.

8. The lock according to claim 7, characterized in that: A group of positioning beads (6) is respectively installed inside the elastic column limiting hole (4) and the positioning hole (5), and a group of supporting springs (7) are clamped at the bottom of each group of positioning beads (6). A marble (9) is clamped at the bottom end of the supporting spring (7) inside the elastic column limiting hole (4), and a limiting ball (8) is clamped at the bottom end of the supporting spring (7) inside the positioning hole (5).

9. The lock according to claim 8, characterized in that: The limiting ball (8) moves through the positioning hole (5) and moves tightly against the inside of the slide groove (19). Each group of marbles (9) elastically extends from the inside of the elastic column limiting hole (4) through the limiting hole (14) and extends into the key slot. The specifications of each group of marbles (9) are different, and each group of marbles (9) of different specifications is provided with a different-specification I-shaped column on the top.

10. The lock according to claim 9, characterized in that: A synchronous connecting seat (10) is rotated inside the limiting groove (2), and a limiting inner groove (11) is provided inside the synchronous connecting seat (10). A rotating door pin (12) is fixedly installed on the outer arc surface of the synchronous connecting seat (10) corresponding to the limiting groove (2). The second positioning plate (38) extends from the inside of the limiting inner groove (11), and the second positioning plate (38) is installed in contact with the inner wall of the limiting inner groove (11). The corresponding end faces of the lock core shell (13) and the positioning lock core (18) are respectively inserted into the two ends of the synchronous connecting seat (10), and the arc lock buckle (39) installed by the lock core shell (13) and the outer arc surface is snapped into the corresponding limiting inner groove (11).

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