Unlocking and code changing structure of mechanical key password padlock

Abstract

The unlocking and code changing structure of the mechanical key password padlock comprises a shell, a lock beam, an unlocking plate, keys and other components, and the shell is composed of a bottom shell and an upper cover. The unlocking plate can move front and back and is provided with a plurality of moving grooves, keys in the grooves can move up and down and rotate in the circumferential direction, lock hooks with different functions are arranged on the two sides of the keys and correspond to second lock hooks on the side walls of the moving grooves, and unlocking and locking are achieved. A limiting ring is arranged at the upper end of the key, the unlocking plate is provided with a code changing groove, an anti-rotation arm on the shell and a limiting ring anti-rotation groove are matched, rotation of the key is accurately controlled, codes can be changed only under specific conditions, operation is convenient, and mistaken touch is prevented. In addition, the key is composed of a column body and a cap body and comprises a reset spring, a positioning groove and a positioning arm, and it is ensured that the position of the key is accurate. The spring in the shell pushes the unlocking plate, the reset plate and the lock beam to be linked with the unlocking plate, the reset plate and the lock beam, automatic reset is achieved, the overall structure is exquisite, and the practicability of the padlock is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of padlocks, and more particularly to an unlocking and code changing structure of a mechanical key-press password padlock. Background Art

[0002] In today's society, the demand for security protection has prompted the continuous development of various types of locks. Mechanical button password padlocks, as a common one, are widely used in many scenarios such as suitcases, warehouse doors, bicycles, etc., to provide protection for people's property safety.

[0003] Mechanical key combination padlocks generally include key components such as the lock body, lock beam, key, and internal mechanical structure. The lock body, as the basic support part, carries the entire lock's operating mechanism; the lock beam plays a key role in connecting and fixing the locked object, ensuring the safety of the object in the locked state; the key is the direct interface for the user to interact with the lock, and the lock is controlled by entering a specific password; and the internal mechanical structure is undoubtedly the core element to achieve precise unlocking and locking functions. When the user accurately enters the correct password, the various components of the internal mechanical structure work together to release the restrictions on the lock beam, allowing it to move smoothly, achieve the purpose of unlocking, and allow the user to access the object smoothly; conversely, if the password is incorrect, the internal mechanical structure will maintain the constraints on the lock beam, making it unable to move, keeping it locked, and effectively preventing unauthorized opening.

[0004] With the continuous evolution of technology, there are still many areas for improvement in the design of existing mechanical button password padlocks. For example, in a button-type changeable mechanical password lock disclosed in the patent with patent application number CN202110504526.3, the password change process is relatively cumbersome. Specifically, when the password needs to be changed, the user must first put the lock in the unlocked state, then manually turn the code change toggle plate, and continue to apply force during the entire code change process to keep the code change toggle plate in the open state after being turned. If there is a slight slack during this period, the code change operation may be interrupted or an error may occur. Only then can the button be rotated to complete the password change and reset. This series of operations not only has complicated steps, but also requires the user to always stay focused and continue to apply external force, which brings great inconvenience to daily use.

[0005] Therefore, how to deeply improve and optimize the internal mechanical structure of the mechanical button password padlock, eliminate complex and redundant operating links, further simplify its operating process, and truly meet people's needs for convenience and efficiency in daily life has become a key problem that needs to be urgently overcome in the design and research and development of mechanical button password padlocks. It is also an important breakthrough direction to promote the development of this type of lock industry and enhance user experience. Summary of the invention

[0006] In view of the problems pointed out in the background technology, the present invention proposes an unlocking and code changing structure of a mechanical key combination padlock to solve the above technical problems.

[0007] The technical solution of the present invention is achieved in this way: The invention discloses an unlocking and code changing structure of a mechanical key password padlock, comprising a shell, an unlocking plate which can move forward and backward is arranged in the shell, a moving groove is arranged in the unlocking plate, a key which can move up and down and rotate circumferentially is connected in the shell, and the key is located in the moving groove. A protruding lock hook 1 is provided on the left and right sides of the key respectively, and the two lock hooks 1 are arranged at intervals in the axial direction of the key, and a protruding lock hook 2 is provided on one side wall of the movable groove; An annular limiting ring is arranged at the upper end of the key, the outer diameter of the limiting ring is larger than the width of the moving groove, and a code changing groove for the limiting ring to enter is arranged on the unlocking plate; The upper side wall of the shell is provided with a hole for the key to pass through, the upper side wall of the shell is provided with an anti-rotation arm extending downward, and the limiting ring is provided with an anti-rotation groove corresponding to the anti-rotation arm; When the button moves downward and the limit ring enters the code switching groove, the anti-rotation arm disengages from the anti-rotation groove.

[0008] The present invention is further configured such that the button comprises a column and a cap body, the cap body and the column are circumferentially fixed and axially slidably connected, and a limiting ring is arranged on the cap body.

[0009] The present invention is further configured such that a return spring is provided between the cap body and the column body.

[0010] The present invention is further configured such that a connecting column connected to the column is provided on the lower side wall of the shell, a corresponding connecting hole is provided on the column, a protruding limiting portion is provided on the side wall of the connecting column, and a fan-shaped limiting groove is provided on the side wall of the connecting hole.

[0011] The present invention is further configured such that three annular positioning grooves are provided at the lower end of the column and are spaced apart in the axial direction of the column, and a positioning arm connected to the positioning groove is provided on the housing.

[0012] The present invention is further configured such that an operating groove is provided on the upper side of the cap body.

[0013] The present invention is further configured to further include a pushing portion for pushing the column to move upward.

[0014] The present invention is further configured such that a connecting seat connected to the column is provided on the lower side wall of the shell, slots are provided on the front and rear sides of the connecting seat respectively, and the pushing part and the positioning arm are respectively arranged corresponding to the slots located on the front and rear sides.

[0015] The present invention is further configured to include a reset plate that can move forward and backward, the pushing portion is fixedly connected to the reset plate, and also includes a series connection bar that is fixedly connected to the shell, and the positioning arm is fixedly connected to the series connection bar.

[0016] The present invention is further configured such that a plurality of movable grooves are provided and are spaced apart in the left-right direction, and two buttons are provided in each movable groove;.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are as follows: When the password needs to be changed, first put the lock in the unlocked state, then move the button down to the limit ring and enter the code change slot. At this time, the button can be turned forward or reverse to change the setting and cancel the password.

[0018] The innovation of the present application is embodied in: a limit ring and a code changing groove, an anti-rotation arm and an anti-rotation groove. The key can be rotated to change the password only when the limit ring enters the code changing groove and the anti-rotation arm is separated from the anti-rotation groove, otherwise, the key cannot be rotated.

[0019] Easy to operate: In the unlocked state, you only need to move the button down to the limit ring to enter the code change slot to change and cancel the password. There is no need to continuously apply force to the code change toggle plate as in the prior art, which simplifies the code change operation process.

[0020] Ingenious structure: through the design of the limit ring and the code change slot, the anti-rotation arm and the anti-rotation slot, the button can be rotated to change the password only under specific conditions, that is, when the limit ring enters the code change slot and the anti-rotation arm is out of the anti-rotation slot, to ensure the security and accuracy of the password setting and avoid misoperation.

[0021] High reliability: The design and coordination of each component are tight, such as the unlocking plate, button, lock hook and other structures, which can accurately realize the unlocking, locking and code changing functions under different conditions, making the overall performance of the padlock stable and reliable, reducing the possibility of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a schematic structural diagram of the unlocking plate and button of the present invention.

[0024] Figure 2 It is a schematic diagram of the decomposition of the button of the present invention.

[0025] Figure 3It is a structural schematic diagram of the unlocking plate of the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the housing, the reset plate and the series connection strips of the present invention.

[0027] Figure 5 It is a schematic diagram of the structure of the column of the present invention.

[0028] Figure 6 It is a schematic structural diagram of the anti-rotation arm and the anti-rotation groove of the present invention.

[0029] Figure 7 It is a schematic structural diagram of the column and positioning arm of the present invention.

[0030] Figure 8 It is a schematic diagram of the structure of the padlock of the present invention.

[0031] Description of the numbers in the accompanying drawings: shell 1, unlocking plate 2, moving slot 3, button 4, column 41, cap body 42, lock hook 1 5, lock hook 2 6, limiting ring 7, code change slot 8, anti-rotation arm 9, anti-rotation slot 10, reset spring 11, connecting column 12, connecting hole 13, limiting portion 14, limiting slot 15, positioning slot 16, positioning arm 17, operating slot 18, pushing portion 19, connecting seat 20, notched opening 21, reset plate 22, series strip 23. DETAILED DESCRIPTION

[0032] 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.

[0033] For reference Figure 1-Figure 8 The present invention is described: Embodiment: An unlocking and code changing structure of a mechanical key combination padlock includes a housing 1, wherein the housing 1 includes a bottom housing and an upper cover, and an opening is provided on the upper side of the bottom housing to provide space for the placement of internal components. A lock beam is connected to the front side of the housing 1 and bears the key responsibility of locking the target object when the padlock is closed.

[0034] An unlocking plate 2 that can move forward and backward is provided in the shell 1. The unlocking plate 2 is a rectangular structure. A movable groove 3 is provided on the unlocking plate 2. The movable groove 3 is arranged along the front and back directions. There are five movable grooves 3. The five movable grooves 3 are arranged at intervals in the left and right directions to provide track support for the precise movement of subsequent keys.

[0035] Cooperating with it is a key 4 connected to the shell 1. The key 4 has the ability to move up and down and rotate circumferentially, and is located in the movable groove 3. Two keys 4 are arranged in front and back in each movable groove 3. Such a sophisticated layout ensures the diversity and accuracy of the password combination.

[0036] The left and right sides of the button 4 are respectively provided with protruding lock hooks 1 5, and the two lock hooks 1 5 are arranged at intervals in the upper and lower directions of the button 4. The lock hook 1 5 located at the lower side is a code lock hook 1, and the lock hook 1 5 located at the upper side is an empty code lock hook 1.

[0037] A protruding lock hook 2 6 is provided on the right side wall of the moving groove 3. The corresponding relationship between the lock hook 1 5 and the lock hook 2 6 is the key to the operation mechanism of the combination lock.

[0038] The button 4 in the coding state and the coding lock hook 1 correspond to the lock hook 2 6 and are located in front of the lock hook 2 6 to prevent the unlocking plate 2 from moving forward.

[0039] The button 4 in the empty code state, the empty code lock hook 1 corresponds to the lock hook 2 6 and is located on the upper side of the front side of the lock hook 2 6. At this time, the unlocking plate 2 can move forward.

[0040] An annular limiting ring 7 is provided at the upper end of the button 4 , and the outer diameter of the limiting ring 7 is larger than the width of the moving groove 3 , so as to ensure the limiting function of the button 4 at a specific position.

[0041] The upper side of the unlocking plate 2 is provided with a code change slot 8 into which the limit ring 7 can enter. The limit ring 7 and the code change slot 8 work together to control the rotation authority of the button 4.

[0042] The upper side wall (i.e., the upper cover) of the housing 1 is provided with a hole (the diameter of the hole is smaller than the outer diameter of the limiting ring 7) for the button 4 to pass through, so as to meet the requirements of human-computer interaction.

[0043] An anti-rotation arm 9 extending downward is provided on the upper side wall of the housing 1, and an anti-rotation groove 10 correspondingly connected to the anti-rotation arm 9 is provided on the limiting ring 7. When the anti-rotation arm 9 is located in the anti-rotation groove 10, the rotation of the button 4 is strictly restricted.

[0044] The padlock is in the initial locked state: all buttons 4 are in the pop-up state, and the code change slot 8 is located at the rear side of the button 4. For the button 4 in the coded state, the code lock hook 1 is just located in front of the lock hook 2 6, preventing the unlocking plate 2 from moving forward, ensuring the safety of the lock; when the button 4 in the coded state is pressed, the button 4 moves downward until the limit ring 7 abuts against the unlocking plate 2, and the code lock hook 1 moves to the lower side of the lock hook 2 6, removing the obstruction to the unlocking plate 2, and the unlocking plate 2 can move forward to unlock. For the button 4 in the empty code state, the empty code lock hook 1 is just located on the upper side of the front side of the lock hook 2 6; when the button 4 in the empty code state is pressed, the button 4 moves downward, and the empty code lock hook 1 moves to the front side of the lock hook 2 6, preventing the unlocking plate 2 from moving forward, and the lock cannot be unlocked. At this time, the button 4 can only move downward to the position where the limit ring 7 abuts against the unlocking plate 2. At this time, the anti-rotation arm 9 is still located in the anti-rotation slot 10, and the button 4 cannot rotate.

[0045] The padlock is in unlocked state: it means that the unlocking plate 2 has moved forward, and the code change slot 8 corresponds coaxially with the button 4, creating conditions for the code change operation. At this time, the code change operation can be performed, and the button 4 moves downward until the limit ring 7 enters the code change slot 8. At this time, the anti-rotation arm 9 is separated from the anti-rotation slot 10, and the button 4 can rotate. When setting a code, the button 4 rotates clockwise to the position, and when not setting a code, the button 4 rotates counterclockwise to the position.

[0046] Compared with the prior art, the technical solution of the present application is that when the password needs to be changed, the lock is first placed in the unlocked state, and the button 4 is then moved downward to the limit ring 7 to enter the code change slot 8. At this time, the button 4 can be rotated forward or reversed to change the setting and cancel the password.

[0047] The innovation of the present application is reflected in the ingenious combination of the limit ring 7 and the code changing slot 8, the anti-rotation arm 9 and the anti-rotation slot 10. Only when the limit ring 7 enters the code changing slot 8 and the anti-rotation arm 9 is separated from the anti-rotation slot 10, the button 4 can be rotated to change the password. Otherwise, the button 4 cannot be rotated, which fundamentally eliminates misoperation and improves the safety and operation convenience of the password padlock.

[0048] The unlocking and code changing structure of the mechanical key combination padlock has the following advantages: Easy to operate: In the unlocked state, you only need to move the button down to the limit ring to enter the code change slot to change and cancel the password. There is no need to continuously apply force to the code change toggle plate as in the prior art, which simplifies the code change operation process.

[0049] Ingenious structure: through the design of the limit ring and the code change slot, the anti-rotation arm and the anti-rotation slot, the button can be rotated to change the password only under specific conditions, that is, when the limit ring enters the code change slot and the anti-rotation arm is out of the anti-rotation slot, to ensure the security and accuracy of the password setting and avoid misoperation.

[0050] High reliability: The design and coordination of each component are tight, such as the unlocking plate, button, lock hook and other structures, which can accurately realize the unlocking, locking and code changing functions under different conditions, making the overall performance of the padlock stable and reliable, reducing the possibility of failure.

[0051] The button 4 is composed of a column 41 and a cap 42. The cap 42 is connected to the upper side of the column 41. The cap 42 and the column 41 are fixed in the circumferential direction and connected in an axial sliding manner. This means that when the cap 42 rotates around the central axis of the column 41, the two will not be displaced relative to each other and can always keep rotating synchronously; while in the axial direction of the column 41, the cap 42 can slide up and down relative to the column 41. This unique connection method lays the foundation for the multi-functional operation of the button 4. For example, when pressing, the cap 42 can move smoothly downward along the column 41 to trigger the mechanical action related to unlocking.

[0052] The limiting ring 7 is arranged on the cap body 42 .

[0053] A return spring 11 is provided between the cap body 42 and the column 41, which always provides an elastic force for the cap body 42 to return to its original position after being pressed. When the user presses the cap body 42, whether in the unlocking operation or other related actions, once the external force disappears, the return spring 11 will quickly push the cap body 42 back to its original position by virtue of its own elastic restoring force.

[0054] A connecting column 12 connected to the column 41 is provided on the lower side wall of the shell 1 (bottom shell). The connecting column 12 is arranged in the up and down direction. A corresponding connecting hole 13 is provided at the center of the column 41. The connecting column 12 is connected to the connecting hole 13. This connection method not only ensures the stable installation of the button 4 in the shell 1, but also lays the groundwork for the subsequent rotation limiting function.

[0055] A protruding limiting portion 14 is provided on the side wall of the connecting column 12, and a fan-shaped limiting groove 15 is provided on the side wall of the connecting hole 13. The cooperation between the two forms an angle limiting mechanism, so that the key 4 can only rotate within an angle range of 180 degrees. This limitation is not arbitrary. On the one hand, it avoids the damage to the mechanical structure of the key 4 due to excessive rotation, ensuring the stability of the entire password padlock mechanical system; on the other hand, within the 180-degree rotation range, it is sufficient to meet the key action range required for password setting, changing and unlocking operations, which not only ensures the integrity of the function, but also improves the reliability of the system through reasonable constraints.

[0056] The lower end of the column 41 is provided with three annular positioning grooves 16 , which are arranged at intervals in the axial direction of the column 41 , and they play a key role in accurately positioning the upper and lower positions of the button 4 in the operation mechanism of the padlock.

[0057] The housing 1 (bottom shell) is provided with a positioning arm 17 connected to the positioning groove 16. The positioning arm 17 is designed to be long and strip-shaped, which gives it sufficient elastic deformation ability and the condition of stable contact with the column 41. One end is firmly connected to the housing 1 to ensure that it will not be displaced during the entire working process, providing a solid foundation for the other end to accurately abut against the column 41. The other end is tightly against the column 41, and relying on its own elastic characteristics, it elastically abuts against the positioning groove 16 on the column 41. Through this clever elastic coordination, no matter what state the padlock is in, the position of the button 4 in the up and down direction can be accurately controlled, effectively preventing the position displacement of the button 4 due to external force impact, vibration or other factors, and ensuring the stability and reliability of the operation of the padlock mechanical structure.

[0058] When the padlock is in the initial locked state, the positioning arm 17 is precisely connected with the positioning groove 16 located at the bottom. This connection state clearly defines the initial position of the button 4, so that the button 4 always remains at the predetermined starting height when no external operating force is applied, and maintains a proper spatial relationship with other mechanical components inside the padlock, ensuring the effective execution of the locking function. When the padlock is in the initial locked state, when the user presses the button 4, as the button 4 moves downward, the limit ring 7 moves synchronously until it reaches the position against the unlocking plate 2. In this process, due to the downward movement of the button 4, the column 41 also moves downward accordingly, so that the positioning arm 17, with its own elasticity, is connected with the positioning groove 16 located in the middle. This dynamic position switching not only reflects the exquisite coordination between the mechanical structures, but more importantly, it accurately locates the position of the button 4 after the pressing operation again, ensuring that the subsequent unlocking actions or other mechanical interactions that may be involved can be carried out in an orderly manner based on the accurate button position, avoiding the unlocking failure or other mechanical failures caused by inaccurate button position.

[0059] A straight-shaped operating slot 18 is provided on the upper side of the cap body 42. This design is to adapt to daily tools. When the cap body 42 needs to be rotated, such as in the password change process, the user only needs to insert a common straight-shaped screwdriver into the operating slot 18 to easily rotate the cap body 42, which greatly reduces the difficulty of manual rotation operation, improves the operation accuracy, and makes delicate operations such as password change more convenient.

[0060] The device further includes a pushing portion 19 for pushing the column 41 to move upward.

[0061] A connection seat 20 connected to the column 41 is provided on the lower side wall of the housing 1 (the connection column 12 is located at the center of the connection seat 20). This structure ensures the stability of the connection between the column 41 and the housing 1. Slots 21 are provided on the front and rear side walls of the connection seat 20, and the pusher 19 and the positioning arm 17 are respectively arranged corresponding to the slots 21 located on the front and rear sides. In this way, when the pusher 19 and the positioning arm 17 perform their respective functions, they can smoothly cooperate with other components inside the housing 1 through the slots 21, avoiding interference between components, optimizing space utilization, and ensuring the smoothness of mechanical movements.

[0062] It also includes a reset plate 22 that can move forward and backward, and the push part 19 is fixedly connected to the reset plate 22, which means that when the reset plate 22 moves downward, it will drive all the push parts 19 to move downward at the same time by virtue of its own mechanical transmission effect, and then drive all the buttons 4 to move forward at the same time. This "one move affects the whole body" linkage mechanism greatly simplifies the operation process, allowing the padlock to respond to operation instructions quickly and synchronously in multiple links such as unlocking, locking and changing codes, improving the user experience and enhancing the overall functionality of the padlock.

[0063] It also includes a series connection bar 23 fixedly connected to the housing 1, and the positioning arm 17 is fixedly connected to the series connection bar 23. The series connection bar 23 is like an invisible bond, which closely connects the multiple positioning arms 17 together, and ensures the stability of the positioning arm 17, so that it will not be displaced or loosened during frequent elastic abutment actions, and ensures the accuracy of positioning the upper and lower positions of the key 4.

[0064] Inside the housing of the padlock, the unlocking plate 2 and the reset plate 22 are respectively provided with springs for applying elastic force forward. These two springs each undertake a key mission and become one of the power sources for driving the orderly operation of the padlock.

[0065] As for the spring acting on the unlocking plate 2, it continuously provides forward elastic force for the unlocking plate 2, and is always ready to push the unlocking plate 2 forward. A locking mechanism that cooperates with the lock beam is set on the front side of the unlocking plate 2. This locking mechanism is like a solid barrier, firmly controlling the locking state of the lock beam. Only when the unlocking plate 2 receives the correct unlocking instruction and overcomes the resistance and moves forward, can the locking mechanism be triggered to release the lock of the lock beam, so that the lock beam can move freely and realize the unlocking action. This mechanism ensures that when the unlocking conditions are not met, the lock beam is firmly locked, ensuring the safety of the padlock.

[0066] At the same time, another spring acting on the reset plate 22 is also indispensable. When the lock beam is pressed backward, the reset plate 22 can be accurately driven to move backward during the backward movement. The reset plate 22 is closely connected to the button 4 through the push portion 19, so the backward movement of the reset plate 22 will further drive all buttons 4 to reset. The automatic reset of each component of the padlock in the closed state is realized, making full preparations for the next unlocking or code changing operation, which not only simplifies the user operation, but also ensures the stability of the mechanical structure of the padlock, so that it always maintains a good working state. After the reset is completed, the reset plate 22 moves forward and returns to its position under the action of the spring.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An unlocking and code changing structure of a mechanical key password padlock, comprising a housing, an unlocking plate that can move forward and backward is provided in the housing, a movable groove is provided on the unlocking plate, a key that can move up and down and rotate circumferentially is connected to the housing, and the key is located in the movable groove, characterized in that: A protruding lock hook 1 is provided on the left and right sides of the key respectively, and the two lock hooks 1 are arranged at intervals in the axial direction of the key, and a protruding lock hook 2 is provided on one side wall of the movable groove; An annular limiting ring is arranged at the upper end of the key, the outer diameter of the limiting ring is larger than the width of the moving groove, and a code changing groove for the limiting ring to enter is arranged on the unlocking plate; The upper side wall of the shell is provided with a hole for the key to pass through, the upper side wall of the shell is provided with an anti-rotation arm extending downward, and the limiting ring is provided with an anti-rotation groove corresponding to the anti-rotation arm; When the button moves downward and the limit ring enters the code switching groove, the anti-rotation arm disengages from the anti-rotation groove.

2. The unlocking and code changing structure of a mechanical key combination padlock according to claim 1, characterized in that: The button comprises a column and a cap body, the cap body and the column are fixed in the circumferential direction and connected in an axial sliding manner, and a limiting ring is arranged on the cap body.

3. The unlocking and code changing structure of a mechanical key combination padlock according to claim 2, characterized in that: A return spring is arranged between the cap body and the column body.

4. The unlocking and code changing structure of a mechanical key combination padlock according to claim 2, characterized in that: A connecting column connected to the column is arranged on the lower side wall of the shell, a corresponding connecting hole is arranged on the column, a protruding limiting portion is arranged on the side wall of the connecting column, and a fan-shaped limiting groove is arranged on the side wall of the connecting hole.

5. The unlocking and code changing structure of a mechanical key combination padlock according to claim 2, characterized in that: The lower end of the column is provided with three annular positioning grooves which are spaced apart in the axial direction of the column, and the housing is provided with positioning arms connected with the positioning grooves.

6. The unlocking and code changing structure of a mechanical key combination padlock according to claim 2, characterized in that: An operating groove is arranged on the upper side surface of the cap body.

7. The unlocking and code changing structure of a mechanical key combination padlock according to claim 5, characterized in that: The utility model also comprises a pushing part for pushing the column to move upward.

8. The unlocking and code changing structure of a mechanical key combination padlock according to claim 7, characterized in that: A connecting seat connected to the column is arranged on the lower side wall of the shell, and slots are arranged on the front and rear sides of the connecting seat respectively, and the pushing part and the positioning arm are arranged corresponding to the slots on the front and rear sides respectively.

9. The unlocking and code changing structure of a mechanical key combination padlock according to claim 8, characterized in that: It also includes a reset plate which can move forward and backward, the pushing part is fixedly connected to the reset plate, and it also includes a series connection bar which is fixedly connected to the shell, and the positioning arm is fixedly connected to the series connection bar.

10. The unlocking and code changing structure of a mechanical key combination padlock according to claim 1, characterized in that: The movable grooves are provided in plurality and are arranged at intervals in the left-right direction, and each movable groove is provided with two buttons.

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