Code conversion structure, lock structure, padlock, code conversion method of padlock

Abstract

The application discloses a code changing structure, a lock structure, a padlock, a code changing method of a padlock, and belongs to the technical field of locks. The code changing structure comprises a key, a locking plate and a lock beam. The locking plate is provided with a limiting piece. The locking plate is provided with a sliding groove for the movement of the limiting piece. The side surface of the key is provided with a protrusion corresponding to the position of the limiting piece. The limiting piece is provided with a gap for the movement of the protrusion. The code changing structure further comprises a plurality of fixed limiting rods. The limiting piece is provided with a matching part for matching the limiting rods. The lock beam is fixedly connected with the locking plate in the direction of pulling out the lock beam, and the lock beam and the locking plate are circumferentially rotatably connected. The pulling out of the lock beam drives the movement of the locking plate to the state that the protrusion at least partially enters the gap. The limiting piece is separated from the limiting rods. The axial movement of the key drives the movement of the limiting piece to change the code. After the resetting of the locking plate, the matching part and the limiting rods are matched again to limit the movement of the limiting piece. The code changing structure can simplify the complexity, reduce the assembly cost, save the structural space and improve the production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to a lock, in particular to a code changing structure, a lock structure, a padlock, and a code changing method of a code changing lock. BACKGROUND

[0002] The prior art patent CN119686589B discloses a code changing key type padlock. The code changing key type padlock comprises a lock opening plate, a code changing plate, a spring two, and a spring three. The code changing plate, the spring two, and the spring three are cooperated to change the code. The code changing plate, the spring two, the spring three, and other components are cooperated to change the code. The structure is complex, the assembly cost is high, and the structure occupies a large space.

[0003] It is not conducive to improve production efficiency and reduce cost. SUMMARY

[0004] In view of the problems in the prior art, the present application provides a code changing structure, a lock structure, a padlock, and a code changing method of a code changing lock, which can simplify the complexity of the code changing structure, reduce the assembly cost, reduce the structure space occupation, and improve the production efficiency.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a code changing structure, comprising a plurality of keys for pressing, a locking plate for locking the keys, and a lock beam connected to the locking plate, wherein the locking plate is provided with a plurality of limiting members movable along the activity direction of the keys; the locking plate is provided with a sliding groove corresponding to the position of the limiting member for the activity of the limiting member; the side surface of the key is provided with a protrusion corresponding to the position of the limiting member, and the limiting member is provided with a notch for the protrusion to enter and exit; the code changing structure further comprises a plurality of fixed limiting rods, and the limiting member is provided with a cooperating part for cooperating with the limiting rod; the lock beam and the locking plate are fixedly connected along the pull-out direction of the lock beam, and the lock beam and the locking plate are circumferentially rotatably connected; when the protrusions of all keys correspond to the notches of the corresponding limiting members, the lock beam is unlocked, and the lock beam is pulled out to drive the locking plate to move to the position where the protrusion at least partially enters the notch, the limiting member is separated from the limiting rod, the limiting member is moved by the axial activity of the key to change the password, and the cooperating part and the limiting rod are re-cooperated to limit the activity of the limiting member after the locking plate is reset.

[0006] As a further improvement of the present application, the cooperating part comprises at least one through hole or notch, and the limiting rod penetrates the through hole or notch or is located at the bottom of the cooperating part to limit the activity of the limiting member.

[0007] As a further improvement of the present application, the cooperating part comprises two through holes or notches, and the limiting rod cooperates with the two through holes or notches to limit the limiting members in two position states, respectively.

[0008] As a further improvement of the present application, the groove wall of the sliding groove is provided with a groove, and the limiting member is provided with a protrusion corresponding to the position of the groove, which is located in the groove to limit the limiting member from coming out of the sliding groove.

[0009] Also provided is a lock structure comprising a housing and the code changing structure as claimed in any one of the preceding claims arranged in the housing; the housing is provided with an anti-rotation protrusion corresponding to the position of the lock beam, and the lock beam is provided with a flat surface corresponding to the position of the anti-rotation protrusion; the lock beam is sequentially provided with the flat surface, a rotation groove and a code changing groove along the axial direction; the limiting rod is fixed in the housing; the flat surface cooperates with the anti-rotation protrusion to limit the rotation of the lock beam; when the lock beam is pulled out to the position where the rotation groove corresponds to the anti-rotation protrusion, the groove wall of the rotation groove cooperates with the anti-rotation protrusion to limit the lock beam from being pulled out further and to allow the lock beam to rotate; when the lock beam is rotated to the position where the code changing groove corresponds to the anti-rotation protrusion, the lock beam can be pulled out further to move the locking plate, the limiting member is separated from the limiting rod, and the limiting member cooperates with the button to change the code by moving the limiting member through the button.

[0010] As a further improvement of the present application, the angle formed by the flat surface and the groove bottom of the code changing groove is 90° or 180°.

[0011] Also provided is a padlock comprising the lock structure as claimed in any one of the preceding claims.

[0012] Also provided is a code changing method of a code changing lock, which is applied to the code changing structure as claimed in any one of the preceding claims and comprises the following steps:

[0013] operate the corresponding button to align the protrusion on the button with the notch of the limiting member, and unlock the lock beam;

[0014] pull out the lock beam along the axial direction, and move the locking plate to make the protrusion at least partially enter the notch;

[0015] move the button along the axial direction to move the limiting member and adjust the code to the target state;

[0016] push the lock beam in the reverse direction to reset the locking plate, re-adapt the notch of the limiting member with the protrusion, and complete the code changing.

[0017] The present application has the following advantages: the code changing structure is linked and cooperated with the button, the locking plate, the limiting member, the limiting rod and the lock beam, which simplifies the cooperative relationship of the components required for code changing, reduces the structural complexity, helps to reduce the assembly cost and the structural space occupation, and thus improves the production efficiency and alleviates the problems of high cost and large space caused by the cooperation of multiple components in the prior art; meanwhile, the cooperation of the limiting rod and the cooperating part can limit the movement of the limiting member after code changing, improve the use stability of the code changing structure, and reduce the accidental change of the code. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1Fig. 1 is a perspective view of the overall structure of the present application;

[0019] Figure 2 Fig. 2 is a front view of the overall structure of the present application;

[0020] Figure 3 Fig. 3 is a perspective view of the back of the code-changing structure of the present application;

[0021] Figure 4 Fig. 4 is another perspective view of the back of the code-changing structure of the present application;

[0022] Figure 5 Fig. 5 is a schematic view of the internal structure of the shell of the present application;

[0023] Figure 6 Fig. 6 is another perspective view of the internal structure of the shell of the present application;

[0024] Fig. 1 is a perspective view of the overall structure of the present application; DETAILED DESCRIPTION

[0025] The present application will be further described in detail below with reference to the embodiments shown in the accompanying drawings.

[0026] Referring to Figures 1-6 Fig. 1, the present embodiment provides a code-changing structure, which comprises a plurality of keys 1 for pressing, a locking plate 2 for locking the keys 1, a locking beam 3 connected to the locking plate 2, and a plurality of limiting members 4 on the locking plate 2 and movable along the direction of movement of the keys 1; the locking plate 2 is provided with a plurality of sliding grooves 10 for the limiting members 4 to move in; the side surface of each key 1 is provided with a protrusion 5 corresponding to the position of each limiting member 4, and the limiting member 4 is provided with a notch 6 for the protrusion 5 to enter and exit; the code-changing structure further comprises a plurality of fixed limiting rods 7, and the limiting member 4 is provided with a matching portion 8 for matching the limiting rods 7; the locking beam 3 is fixedly connected to the locking plate 2 in the direction of pulling out of the locking beam 3, and the locking beam 3 and the locking plate 2 are circumferentially rotatably connected; when the protrusions 5 of all the keys 1 correspond to the notches 6 of the corresponding limiting members 4, the locking beam 3 is unlocked, and the locking beam 3 is pulled out to drive the locking plate 2 to move to a position where the protrusions 5 at least partially enter the notches 6, the limiting members 4 are separated from the limiting rods 7, the limiting members 4 are moved by the axial movement of the keys 1 to change the code, and the matching portion 8 of the locking plate 2 is matched with the limiting rods 7 to limit the movement of the limiting members 4 after the locking plate 2 is reset.

[0027] The size of the sliding groove 10 is matched with the shape of the limiting piece 4, ensuring that the limiting piece 4 can move smoothly along the sliding groove 10; the axial connection and circumferential rotating connection between the locking beam 3 and the locking plate 2 can be realized by setting an annular groove and a clamping block at the connection part of the locking beam 3 and the locking plate 2, so that the rotation of the locking beam 3 relative to the locking plate 2 does not affect the axial fixed relationship between the two, ensuring that the locking beam 3 can drive the locking plate 2 to move synchronously when it is pulled out. The key 1 is matched with the protrusion 5 and the notch 6 of the limiting piece 4. When it is necessary to change the code, first press all the keys 1 down to align the protrusion 5 with the notch 6 of the limiting piece 4, at this time the locking beam 3 is in an unlocked state, the locking beam 3 is pulled out outward, the locking beam 3 drives the locking plate 2 to move synchronously, until the protrusion 5 of the key 1 at least partially enters the notch 6 of the limiting piece 4, at this time the limiting piece 4 can be moved along the moving direction of the key 1 by axial pressing or pushing the key 1, so as to adjust the matching position of the limiting piece 4 and the key 1, and realize the code changing. This structure does not need multiple additional transmission components, simplifies the component cooperation in the code changing process, helps to reduce the assembly difficulty and cost, at the same time reduces the overall occupied space of the structure, and improves the production efficiency.

[0028] In order to facilitate the positioning of the limiting piece 4 after the code changing, and avoid the accidental movement of the limiting piece 4 leading to the password disorder, the code changing structure further comprises a plurality of fixed limiting rods 7, and the limiting piece 4 is provided with a matching part 8 for cooperating with the limiting rod 7, the matching part 8 is separated from the limiting rod 7 for the movement of the limiting piece 4 when the code is changed, and the matching part 8 cooperates with the limiting rod 7 again after the locking plate 2 is reset, so as to limit the movement of the limiting piece 4.

[0029] The limiting rod 7 can be fixed on the shell 13 or other fixed components of the lock, and its position corresponds to the matching part 8 of the limiting piece 4. When the locking beam 3 drives the locking plate 2 to move to the code changing position, the limiting piece 4 moves synchronously with the locking plate 2, so that the matching part 8 is separated from the limiting rod 7, the limiting piece 4 is released from the limiting constraint, and can be freely moved to cooperate with the code changing operation; after the code changing is completed, the locking beam 3 is reset, the locking plate 2 returns to the initial position, the matching part 8 cooperates with the limiting rod 7 again, and the limiting piece 4 is limited, so as to prevent it from moving randomly in the non-code changing state. The cooperation between the limiting rod 7 and the matching part 8 improves the use stability of the code changing structure, reduces the accidental change of the password, and at the same time does not increase the complexity of the structure, which takes into account the practicability and economy.

[0030] Further optimization can be realized by selecting the following mode: the matching part 8 comprises at least one through hole 9 or notch 6, and the limiting rod 7 penetrates into the through hole 9 or notch 6 or is located at the bottom of the matching part 8, so as to limit the movement of the limiting piece 4.

[0031] The size of the through hole 9 or the notch 6 of the matching part 8 is matched with the outer diameter of the limiting rod 7, so that the limiting rod 7 can be stably inserted or matched. When the matching part 8 is the through hole 9, the limiting rod 7 is inserted into the through hole 9, and the movement of the limiting part 4 is limited by the matching of the hole wall and the limiting rod 7; when the matching part 8 is the notch 6, the limiting rod 7 can be inserted into the notch 6 or abut against the bottom of the notch 6, which can also limit the limiting part 4. This structure is simple in design, low in processing difficulty, convenient for batch production, and can effectively realize the limiting function, further improving the stability of the code changing structure.

[0032] In some options, the matching part 8 includes two through holes 9 or notches 6, and the limiting rod 7 matches with the two through holes 9 or notches 6, respectively, for limiting the limiting parts in two position states.

[0033] The two through holes 9 or notches 6 correspond to the locked position and the initial limiting position of the limiting part 4 after code changing, respectively, and the limiting rod 7 can effectively limit the limiting part 4 in different position states by matching with different through holes 9 or notches 6. When the limiting part 4 is in the initial state, the limiting rod 7 matches with one of the through holes 9 or notches 6; after code changing, the limiting part 4 moves to a new position, and the limiting rod 7 matches with the other through hole 9 or notch 6, so that the limiting part 4 can be stably limited in two key positions. This design further improves the reliability of the limiting, accurately controls the movement range of the limiting part 4, and improves the use stability of the code changing structure and the reliability of the password preservation.

[0034] In order to further improve the connection stability of the limiting part 4 and the locking plate 2 and avoid the limiting part 4 from being pulled out during movement, in another optional scheme, the groove wall of the sliding groove 10 is provided with a groove 11, the limiting part 4 has a protrusion 12 at the position corresponding to the groove 11, and the protrusion 12 is located in the groove 11 to prevent the limiting part 4 from being pulled out of the sliding groove 10. As shown in the drawings, the sliding groove 10 can be formed in a T shape by two grooves 11.

[0035] The size of the groove 11 and the protrusion 12 is matched with each other, and after the protrusion 12 is embedded in the groove 11, it will not affect the movement of the limiting part 4 along the sliding groove 10, and at the same time, it can prevent the limiting part 4 from being pulled out in a direction perpendicular to the sliding groove 10. This structure improves the connection stability of the limiting part 4 and the locking plate 2 by matching the protrusion 12 with the groove 11 without adding additional limiting components, reduces the situation that the limiting part 4 is pulled out and causes the code changing structure to fail, prolongs the service life of the code changing structure, and at the same time, maintains the simplicity of the structure.

[0036] Based on the above code conversion structure, the embodiment also provides a lock structure, which comprises a shell 13 and a code conversion structure as any of the above in the shell 13; the shell 13 is provided with an anti-rotation protrusion 14 corresponding to the position of the lock beam 3, and the lock beam 3 is provided with a flat surface 15 corresponding to the position of the anti-rotation protrusion 14; the lock beam 3 is sequentially provided with the flat surface 15, a rotation groove 16 and a code conversion groove 17 along the axial direction; the flat surface 15 cooperates with the anti-rotation protrusion 14 to limit the rotation of the lock beam 3; when the lock beam 3 is pulled out to the position corresponding to the rotation groove 16 and the anti-rotation protrusion 14, the groove wall of the rotation groove 16 cooperates with the anti-rotation protrusion 14 to limit the lock beam 3 from being pulled out continuously and to rotate; when the lock beam 3 is rotated to the position corresponding to the code conversion groove 17 and the anti-rotation protrusion 14, the lock beam 3 can be pulled out continuously and drives the locking plate 2 to move, so that the limiting member 4 cooperates with the button 1, and the limiting member 4 is driven by the button 1 to change the code.

[0037] The shell 13 is the basic component of the lock structure, and each component of the code conversion structure is installed in the shell 13. The anti-rotation protrusion 14 is integrally formed or fixedly connected to the inner wall of the shell 13, and its position corresponds to the flat surface 15 of the lock beam 3. The flat surface 15, the rotation groove 16 and the code conversion groove 17 of the lock beam 3 are sequentially arranged along the axial direction, and their sizes are matched with the anti-rotation protrusion 14. In the non-code conversion state, the flat surface 15 of the lock beam 3 is attached to the anti-rotation protrusion 14, limiting the rotation of the lock beam 3 relative to the shell 13, and ensuring the locking stability of the lock; when the code needs to be changed, the button 1 is pressed downward with the correct code to unlock the lock beam 3, and the lock beam 3 is pulled out outward. When the rotation groove 16 moves to the position corresponding to the anti-rotation protrusion 14, the groove wall of the rotation groove 16 abuts against the anti-rotation protrusion 14, limiting the lock beam 3 from being pulled out outward continuously, and the lock beam 3 can be rotated at this time. When the lock beam 3 is rotated to the position corresponding to the code conversion groove 17 and the anti-rotation protrusion 14, the anti-rotation protrusion 14 no longer limits the axial movement of the lock beam 3, and the lock beam 3 can be pulled out continuously, driving the locking plate 2 to move to the code conversion position, and at this time, the limiting member 4 cooperates with the button 1, and the limiting member 4 is driven by the button 1 to change the code. The lock structure realizes the orderly switching of the three states of locking, rotating and code conversion through the cooperation of the flat surface 15, the rotation groove 16 and the code conversion groove 17 on the lock beam 3 and the anti-rotation protrusion 14, the operation process is clear, the structure design is reasonable, which helps to improve the use convenience of the lock, and at the same time, the internal structure of the lock is simplified, and the production cost is reduced.

[0038] In order to integrate the fixing structure of the limiting rod 7 and make the lock structure more compact, in an alternative scheme, the lock structure comprises a housing 13 and a code changing structure comprising the limiting rod 7 arranged in the housing 13; a rotation prevention protrusion 14 is arranged in the housing 13 corresponding to the position of the lock beam 3, and a flat surface 15 is arranged on the lock beam 3 corresponding to the position of the rotation prevention protrusion 14; the flat surface 15 and the rotation prevention protrusion 14 cooperate to limit the rotation of the lock beam 3; when the lock beam 3 is pulled out to the position corresponding to the rotation prevention protrusion 14, the groove wall of the rotation groove 16 cooperates with the rotation prevention protrusion 14 to limit the lock beam 3 from being pulled out further and allows the lock beam 3 to rotate; when the lock beam 3 is rotated to the position corresponding to the code changing groove 17 and the rotation prevention protrusion 14, the lock beam 3 can be pulled out further, and the lock plate 2 is moved, the limiting piece 4 is separated from the limiting rod 7, and the limiting piece 4 cooperates with the key 1 to change the code by driving the limiting piece 4 to move.

[0039] The limiting rod 7 is directly fixed in the housing 13 without the need for an additional fixing support, which reduces the number of components, makes the internal structure of the lock more compact, and improves the space utilization rate. The cooperation mode of the rotation prevention protrusion 14 and the flat surface 15, the rotation groove 16, and the code changing groove 17 of the lock beam 3 is consistent with the aforementioned lock structure, which ensures the orderly switching of the locked, rotated, and code changed states; at the same time, the cooperation of the limiting rod 7 and the cooperation part 8 of the limiting piece 4 releases the limiting during code changing and realizes the limiting after code changing, which improves the stability of the lock. The structure integrates the limiting rod 7 and the housing 13, which further simplifies the assembly process of the lock, reduces the assembly cost, improves the internal space layout of the lock, and improves the rationality of the structure.

[0040] The angle between the flat surface 15 and the groove bottom of the code changing groove 17 can be 90° or 180°.

[0041] The angle between the flat surface 15 and the groove bottom of the code changing groove 17 is 90° or 180°, which conforms to the conventional machining process, is convenient for the machining and manufacturing of the lock beam 3, and reduces the machining difficulty and cost. When the angle is 90°, the lock beam 3 is rotated by 90° to make the code changing groove 17 correspond to the rotation prevention protrusion 14; when the angle is 180°, the lock beam 3 is rotated by 180° to realize the correspondence. Both angles can meet the switching requirements of the code changing operation, and the operation is convenient. Users can select the appropriate angle according to the use habit or the installation scene of the lock to improve the applicability of the lock.

[0042] Based on the optimized lock structure described above, the present embodiment further provides a padlock comprising any one of the lock structures described above.

[0043] The shell 13 of the padlock adopts a structure design suitable for the use scene of the padlock, and both ends of the lock beam 3 extend out of the shell 13 to form a hanging structure, facilitating the use of the padlock on various objects. The padlock integrates all the technical features of the aforementioned lock structure, and through the simplified coding structure and reasonable cooperation design of the lock beam 3 and the anti-rotation protrusion 14, the convenience of coding operation is improved, the production and assembly cost of the padlock is reduced, the overall size of the padlock is reduced, and the market competitiveness of the padlock is improved. At the same time, its stable limiting structure and coding mechanism help to improve the use reliability and service life of the padlock.

[0044] In order to clarify the coding process of the coding structure, in an alternative scheme, a coding method of a coding lock is provided, which is applied to any one of the coding structures or lock structures described above, comprising the following steps: operating the corresponding key 1 to align the protrusion 5 on the key 1 with the notch 6 of the limiting piece 4, and unlocking the lock beam 3; pulling out the lock beam 3 along the axial direction, and moving the locking plate 2 driven by the lock beam 3, so that the protrusion 5 at least partially enters the notch 6; moving the key 1 along the axial direction to drive the limiting piece 4 to move, and adjusting the password to the target state; reversely pushing the lock beam 3 to reset the locking plate 2, and re-adapting the position of the notch 6 of the limiting piece 4 to the protrusion 5, to complete the password change.

[0045] The coding method is based on the structure design of the aforementioned coding structure, and the steps are clear and operable. When operating, first, according to the current password, operate the corresponding key 1 to accurately align the protrusion 5 on each key 1 with the notch 6 of the corresponding limiting piece 4, at this time, the locking relationship between the lock beam 3 and the locking plate 2 is released, and the lock beam 3 can move along the axial direction; then pull out the lock beam 3 along the axial direction, and the lock beam 3 drives the locking plate 2 to move synchronously through the axial fixed connection structure, until the protrusion 5 of the key 1 at least partially enters the notch 6 of the limiting piece 4, and the limiting piece 4 is separated from the limiting rod 7 to release the limiting constraint; then press or push the key 1 along the axial direction to drive the limiting piece 4 to move along the sliding groove 10 on the locking plate 2, adjust the cooperation position of the limiting piece 4 and the key 1, until the target password state is reached; finally, reversely push the lock beam 3 to reset the locking plate 2 along the axial direction driven by the lock beam 3, and the cooperation part 8 of the limiting piece 4 cooperates with the limiting rod 7 again, limiting the movement of the limiting piece 4, and the notch 6 of the limiting piece 4 and the protrusion 5 of the key 1 are re-adapted, to complete the password change. This method does not require complex operation steps, users can quickly master it, and the coding process is stable and reliable, which helps to improve the user experience, and has strong adaptability to the coding structure, can fully exert the advantages of the coding structure, and improve the coding efficiency.

[0046] The above merely describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-described embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A code structure comprising a plurality of keys for pressing, a locking plate for locking the keys, and a locking beam connected to the locking plate, characterized in that, The locking plate is provided with a plurality of limiting members movable along the key activity direction; the locking plate is provided with a sliding groove for the limiting member to move at the position corresponding to the limiting member; the side of the key is provided with a protrusion at the position corresponding to the limiting member, and the limiting member is provided with a notch for the protrusion to enter and exit; the code changing structure further comprises a plurality of fixed limiting rods, and the limiting member is provided with a matching part for matching the limiting rod; the lock beam is fixedly connected with the locking plate in the lock beam pulling-out direction, and the lock beam and the locking plate are circumferentially rotatably connected; when the protrusions of all keys are aligned with the notches of the corresponding limiting members, the lock beam is unlocked, and the lock beam is pulled out to drive the locking plate to move to the position where the protrusion at least partially enters the notch, the limiting member is separated from the limiting rod, the code is changed by the axial activity of the key to drive the limiting member to move, and the matching part of the locking plate is matched with the limiting rod again after the locking plate is reset to limit the activity of the limiting member; The matching part comprises at least one through hole or notch, and the limiting rod penetrates the through hole or notch or is located at the bottom of the matching part to limit the activity of the limiting member.

2. The escape structure of claim 1, wherein, The matching part comprises two through holes or notches, and the limiting rod matches the two through holes or notches to limit the limiting members in two position states respectively.

3. The escape structure of claim 1, wherein, The groove wall of the sliding groove is provided with a groove, and the limiting member has a protrusion at the position corresponding to the groove, and the protrusion is located in the groove to limit the limiting member from exiting the sliding groove.

4. A lock structure characterized by comprising: The lock structure comprises a shell and a code changing structure as claimed in any one of claims 1-3 arranged in the shell; the shell is provided with an anti-rotation protrusion at the position corresponding to the lock beam, and the lock beam is provided with a flat surface at the position corresponding to the anti-rotation protrusion; the lock beam is sequentially provided with a flat surface, a rotating groove and a code changing groove along the axial direction; the limiting rod is fixed in the shell; the flat surface is matched with the anti-rotation protrusion to limit the rotation of the lock beam; when the lock beam is pulled out to the position where the rotating groove is matched with the anti-rotation protrusion, the groove wall of the rotating groove is matched with the anti-rotation protrusion to limit the lock beam from being continuously pulled out and to provide a rotating space for the lock beam; when the lock beam is rotated to the position where the code changing groove is matched with the anti-rotation protrusion, the lock beam can be continuously pulled out to drive the locking plate to move, the limiting member is separated from the limiting rod, the limiting member is matched with the key, and the code is changed by the activity of the limiting member driven by the key.

5. The lock structure according to claim 4, wherein The angle formed by the flat surface and the groove bottom of the code changing groove is 90° or 180°.

6. A padlock characterized in that The lock structure comprises the lock structure as claimed in any one of claims 4-5.

7. A method for encoding a lock code, applied to the encoding structure according to any one of claims 1-3, characterized in that, The steps comprise: operate the corresponding key to align the protrusion on the key with the notch of the limiting member, and unlock the lock beam; pull out the lock beam along the axial direction to drive the locking plate to move, so that the protrusion at least partially enters the notch; move the key along the axial direction to drive the limiting member to move and adjust the code to the target state; push the lock beam in the reverse direction to drive the locking plate to reset, and the notch of the limiting member is matched with the position of the protrusion again to complete the code changing.

8. A method for coding a lock, applied to the lock structure as claimed in any one of claims 4-5, characterized in that, The steps comprise: operate the corresponding key to align the protrusion on the key with the notch of the limiting member, and unlock the lock beam; pull out the lock beam along the axial direction to drive the locking plate to move, so that the protrusion at least partially enters the notch; move the key along the axial direction to drive the limiting member to move and adjust the code to the target state; push the lock beam in the reverse direction to drive the locking plate to reset, and the notch of the limiting member is matched with the position of the protrusion again to complete the code changing.

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