Code-changing structure of a mechanical key padlock and the padlock

Abstract

The present invention provides a code-changing structure and a padlock for a mechanical key padlock. The padlock includes a lock housing and a lock beam, and the lock beam is buckled with the lock housing. Inside the lock housing, there is an unlocking member that can move back and forth and a second spring. The unlocking member is U-shaped and opens forward. There are also holding arms corresponding to both ends of the lock beam. The rear end of the holding arm is rotatably connected to the lock housing, and the front end holds the lock beam tightly under the action of a third spring. The unlocking member is located between the holding arms, and its two squeezing parts can cause the holding arms to rotate and release the lock beam to achieve unlocking. A button that can move up and down is provided inside the lock housing. The button is slidably connected to a connecting seat. A push plate can move back and forth, and its two pushing hands correspond to the button. The push plate is driven to move through a linkage column and a linkage hole, thereby changing the position of the coding column to switch the empty code and the code-setting state of the button. A dial can be rotated left and right to drive the push plate, and a reset part is also provided. Pressing the lock beam can drive the reset part to reset the button. The structure of the present invention is delicate and the operation is convenient, effectively improving the convenience and security of code-changing and unlocking of the padlock.

Description

Technical Field

[0001] The present invention relates to the technical field of padlocks, and particularly to a code-changing structure and a padlock for a mechanical key padlock. Background Art

[0002] As a common lock, the padlock is widely used in many fields such as daily life and industrial production. The traditional padlock usually consists of a lock body and a lock beam. The lock beam is directly buckled with the lock body to form a closed lock to achieve the safety protection of items or places. With the development of technology and the improvement of user requirements, the mechanical key password padlock has emerged. It allows users to open the lock beam by entering the correct key password. Compared with the traditional key unlocking method, it has higher confidentiality and convenience, eliminating the need to carry keys and reducing the security risks caused by key loss or theft.

[0003] However, there are many deficiencies in the existing mechanical key password padlocks in terms of the code-changing structure. When changing the code of the traditional mechanical password lock, it is necessary to disassemble many parts of the lock body, and the operation process is extremely cumbersome and complex. For example, in the Chinese patent application No. CN200720053964.8, the invention name is a code-changing mechanism for the lock body of a button-type mechanical password lock. Although the code-changing method is improved to a certain extent, before changing the code, it is still necessary to rotate the shift member to move the limit plate to a specific position to make the fixed core in a rotatable state, and then the code can be changed by operating the button. The operation process is still relatively complex, and the requirements for the quality and precision of the button are relatively high, which is difficult to meet the user's needs for convenience and efficiency. There are also some code-changing mechanisms with complex overall structures and high manufacturing costs, which not only increase the production difficulty but also raise the product price, being unfavorable for market promotion.

[0004] In summary, how to design a code-changing structure with a simple structure and convenient operation has become a key problem that needs to be solved urgently by the designers of mechanical key padlocks. The present invention aims to provide an innovative code-changing structure and a padlock for a mechanical key padlock to overcome the above defects in the prior art and meet the market demand for high-performance padlocks. Summary of the Invention

[0005] In view of the problems pointed out in the background art, the present invention proposes a code-changing structure and a padlock for a mechanical key padlock to solve the above technical problems.

[0006] The technical solution of the present invention is realized as follows:

[0007] A code-changing structure for a mechanical key padlock includes a key that can move up and down,

[0008] and further includes a push plate that can move back and forth. A plurality of protruding push hands are respectively arranged on the left and right sides of the push plate. A key is correspondingly arranged between two adjacent push hands on the same side in the front and back direction;

[0009] The button is connected with a coding column that can move up and down, and a protruding push block is provided on the coding column, and the push block is located between two adjacent push handles in front and behind;

[0010] Two positioning holes are arranged at intervals along the up-down direction on the key, and a positioning part is arranged on the coding column and is connected with the positioning holes to position the coding column;

[0011] When the push plate moves forward and backward, the push block can be pushed up and down by the push handle, so that the positioning part on the coding column switches the position between the upper and lower positioning holes.

[0012] The present invention is further configured to include a dial button that can be rotated left and right, the dial button is located on the lower side of the push plate, the dial button is provided with a linkage column protruding upward, the push plate is provided with a linkage hole corresponding to the linkage column, and also includes a spring for resetting the dial button that rotates left and right, and the left and right rotation of the dial button drives the push plate to move forward and backward.

[0013] The present invention is further configured such that the button includes a column part, a cap part is connected to the upper end of the column part, a connecting hole is provided on the column part and passes through the lower side thereof, the coding column is connected in the connecting hole, a positioning hole is provided on the column part, and a movable groove corresponding to the push block is provided on the side wall of the column part.

[0014] The present invention is further configured such that a protruding locking block is provided on the coding column, the locking block and the pushing block are symmetrically arranged about the center of the coding column, and a second moving groove corresponding to the locking block is opened on the side wall of the column part.

[0015] The present invention is further configured to include a lock shell, a connecting seat corresponding to the column part is provided in the lock shell, an opening is provided on the upper side surface of the lock shell for the cap body part to extend out, and the cap body part is provided with an anti-slip edge to prevent the key from falling out of the lock shell; a dial button is rotatably connected to the lock shell, a dial part is provided on the dial button, and a slot is provided on the lower side of the lock shell for the dial part to extend out.

[0016] The present invention is further configured such that the spring one is circular and coaxial with the rotation center of the dial button, two torsion arms extend from both ends of the spring one, a protruding abutment portion is provided on the inner wall of the lock shell, the abutment portion is located between the two torsion arms, and a protruding swing arm is provided on the dial button, the swing arm is located between the two torsion arms.

[0017] The present invention is further configured such that the front side surface and the rear side surface of the push handle are both inclined surfaces with the front side being lower and the rear side being higher.

[0018] A padlock includes the above-mentioned code-changing structure, wherein a lock opening member that can move forward and backward and a spring 2 that applies a backward elastic force to the lock opening member are arranged in a lock shell, the lock opening member is U-shaped and is opened forward, the button is located on the inner side of the lock opening member, and collision portions corresponding to the lock block are respectively arranged on the left and right sides of the lock opening member; a lock beam is connected to the front side of the lock shell, and two holding arms corresponding to the two ends of the lock beam are respectively arranged in the lock shell, the rear end of the holding arm is rotatably connected to the lock shell, and the front end of the holding arm is tightly held on the lock beam under the action of a spring 3 and limits the lock beam from moving forward out of the shell; protruding squeezing portions are respectively arranged on the left and right sides of the lock opening member, and when the lock opening member moves forward, the squeezing portion can force the holding arm to rotate and leave the lock beam; the lock opening member is provided with a pushing portion that protrudes upward, and a pushing groove corresponding to the pushing portion is provided on the front side surface of the lock shell.

[0019] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0020] When the positioning portion on the coding column is connected to the positioning hole on the upper side of the key, the key is in an empty code state.

[0021] When the positioning portion on the coding column is connected to the positioning hole on the lower side of the button, the button is in a coding state.

[0022] In the initial state, all buttons are located at the uppermost position. At this time, for buttons in the empty code state, the lock block is located on the upper side of the collision part of the unlocking part, and the push block is located on the upper side of the push handle of the push plate. At this time, for buttons in the set code state, the lock block is at the same height as the collision part and is located in front of the collision part, preventing the unlocking part from moving forward; the push block is at the same height as the push handle and is located in front of the push handle.

[0023] When unlocking is required: press the button in the coding state downward, the lock block moves to the lower side of the collision part, and the unlocking piece can move forward to unlock.

[0024] When the password needs to be changed: all buttons are reset to the top position first. The push plate moves forward, and the pusher pushes the push block on the button in the coding state to move upward, so that all buttons enter the empty code state. Then press the button that needs to be coded and move it downward. After pressing, the push block and the pusher are at the same height. The push plate moves backward, and the pusher pushes the push block on the button to move downward, so that all the pressed buttons enter the coding state, and the button moves upward and resets to the top position.

[0025] Advantages: All passwords can be cleared at once by moving the push plate upwards; when setting a new password, just press the corresponding button and move the push plate downwards once to complete the new password setting. Its operation is simple and convenient. The forward and backward movement of the push plate is driven by a dial button that can be turned left and right. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of the padlock of the present invention.

[0028] Figure 2 It is a schematic structural diagram of the interior of the padlock of the present invention.

[0029] Figure 3 It is a schematic structural diagram of the decomposed lock beam of the present invention.

[0030] Figure 4 It is a schematic structural diagram of the unlocking member, lock beam, and holding portion of the present invention.

[0031] Figure 5 It is a schematic structural diagram of the code-changing structure of the present invention.

[0032] Figure 6 It is a schematic structural diagram of the push plate of the present invention.

[0033] Figure 7 It is a schematic structural diagram of the button and coding column of the present invention.

[0034] Figure 8 It is a schematic structural diagram of the push plate inside the lock housing of the present invention.

[0035] Figure 9 It is a schematic diagram of the push plate and the dial button of the present invention Figure 1 。

[0036] Figure 10 It is a schematic diagram of the push plate and the dial button of the present invention Figure 2 。

[0037] Figure 11 It is a schematic structural diagram of the reset portion and the reset member provided in the lock housing of the present invention.

[0038] Figure 12 It is a schematic structural diagram of the lock beam, reset portion, and reset member of the present invention.

[0039] Figure 13 It is a schematic structural diagram of the unlocking member, push plate, and coding column of the present invention.

[0040] Explanation of the numbers in the accompanying drawings: push plate 1, push handle 2, coding column 3, push block 4, positioning hole 5, positioning part 6, dial button 7, linkage column 8, linkage hole 9, spring one 10, column part 11, cap body part 12, connecting hole 13, movable groove one 14, locking block 15, movable groove two 16, lock shell body 17, connecting seat 18, anti-slip edge 19, toggle part 20, notch 21, torsion arm 22, abutment part 23, swing arm 24, inclined surface 25, unlocking piece 26, spring two 27, collision part 28, lock beam 29, holding arm 30, extrusion part 31, pushing part 32, pushing groove 33, spring three 34, rotating shaft 71, entering groove 181, reset part 182, reset piece 183, spring four 184, driving part 60, driving block 61, plane part 601, curved part 602, spring five 62. DETAILED DESCRIPTION

[0041] 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.

[0042] For reference Figures 1 - 13 The present invention is described:

[0043] Embodiment: A padlock includes a lock housing 17, and a lock beam 29 is connected to the front side of the lock housing 17. The two work together to achieve the locking function. The lock housing 17 is a core bearing component, and a series of precise and interrelated mechanical components are contained inside. These components are arranged in an orderly manner and serve the process of unlocking and locking together.

[0044] The lock housing 17 is provided with an unlocking member 26 that can move forward and backward and a spring 27 that applies a backward elastic force to the unlocking member 26. The unlocking member 26 is U-shaped and is opened forward. The unlocking member 26 has the ability to move forward and backward, and this moving function is the key driving factor to realize the unlocking action.

[0045] One end of the second spring 27 is connected to a fixed position inside the lock housing 17, and the other end abuts against the unlocking member 26, continuously applying a backward elastic force to the unlocking member 26. Under normal conditions, that is, when the lock is in a locked state, the elastic force of the second spring 27 ensures that the unlocking member 26 remains in the initial position, waiting to be triggered to start the unlocking process.

[0046] Two holding arms 30 are provided in the lock housing 17, which correspond to the two ends of the lock beam 29 respectively. The rear end of the holding arm 30 is rotatably connected to the lock housing 17 through a connecting piece such as a pin shaft. This rotational connection method gives the holding arm 30 flexible swinging ability, so that its front end can perform the action of tightening or loosening the lock beam 29.

[0047] The third spring 34 applies a force to the holding arms 30, causing the front ends of the holding arms 30 to tightly hold the locking beam 29 in the natural state, forming a stable restriction on the locking beam 29 from both sides, effectively preventing the locking beam 29 from accidentally moving forward and disengaging from the lock housing 17, and ensuring the locking safety of the padlock.

[0048] The unlocking member 26 is located between the two holding arms 30. Convex pressing portions 31 are respectively provided on the left and right sides of the unlocking member 26. The protruding pressing portions 31 become the key structures for interacting with the holding arms 30. When the unlocking member 26 receives an external force and is driven to move forward, the pressing portions 31 synchronously advance forward along with the displacement of the unlocking member 26. The pressing portions 31 come into contact with the holding arms 30, causing the holding arms 30 to overcome the elastic force of the third spring 34 after being pressed, rotate outward around the rotation connection points at the rear ends, and thus cause the front ends of the holding arms 30 to leave the locking beam 29, releasing the restraint on the locking beam 29 and creating conditions for the unlocking movement of the locking beam 29.

[0049] The unlocking member 26 is provided with a protruding pushing portion 32 upward. A pushing groove 33 corresponding to the pushing portion 32 is formed on the front side surface of the lock housing 17. When the user needs to unlock the lock, the finger can accurately touch the pushing portion 32 through the pushing groove 33 and then apply an upward pushing force. This pushing force overcomes the elastic force of the second spring 27 and other possible minor resistances, driving the unlocking member 26 to move upward and start the unlocking process. When the external force is withdrawn, the unlocking member 26 automatically moves downward and resets under the elastic force of the second spring 27. The second spring 27 then exhibits its characteristics of storing and releasing energy, pulling the unlocking member 26 back to the initial static position, waiting for the next unlocking operation instruction. During this process, the holding arms 30 will also, along with the reset movement of the unlocking member 26, re-lock the locking beam 29 under the action of the third spring 34, restoring the locking state of the padlock and ensuring that the padlock can continuously and effectively perform the safety protection function.

[0050] After unlocking, when the locking beam 29 re-enters the lock housing 17 for locking, the locking beam 29 will exert pressure on the front ends of the holding arms 30, pushing the holding arms 30 to open.

[0051] The lock housing 17 is provided with keys that can move up and down. Each key is composed of two parts. The cylindrical column part 11 serves as the main support structure, which has good guiding properties and can stably move vertically within the lock housing 17. The upper end of the column part 11 is connected to the cap part 12. On the one hand, the cap part 12 facilitates the user's finger operation and pressing. On the other hand, its size design is adapted to the opening on the upper side surface of the lock housing 17, ensuring that during the up and down movement of the key, the cap part 12 can smoothly extend for the user to operate and can also maintain a tight fit without wobbling or jamming.

[0052] The connecting hole 13 opened on the cylindrical part 11 and penetrating its lower side is a key design, which provides a structural basis for the subsequent connection and linkage with the coding column 3, enabling the button and the coding column 3 to work together to achieve complex password setting and unlocking functions.

[0053] On the lower side wall inside the lock housing 17, there is a connecting seat 18 corresponding to the cylindrical part 11. The connecting seat 18 is annular, and this design complements the cylindrical shape of the cylindrical part 11, and the two form an accurate up and down sliding connection. It not only ensures the freedom of movement of the button in the vertical direction but also restricts its displacement in the horizontal direction, ensuring that each operation of the button can accurately execute the corresponding function.

[0054] To prevent the button from accidentally falling out of the lock housing 17, a retaining edge 19 is specifically provided on the cap part 12. The size of the retaining edge 19 is slightly larger than the diameter of the opening on the upper side of the lock housing 17. When the button is within the normal up and down movement range, the retaining edge 19 will not interfere with the lock housing 17; but once the button is subjected to abnormal external force and has a tendency to fall out, the retaining edge 19 will closely abut against the upper side wall of the lock housing 17, and by virtue of friction and structural blockage, the button will be firmly fixed within the lock housing 17.

[0055] The button has two distinct position states, and these two states play a crucial role in the operation of the padlock:

[0056] Downward pressing state: When the button is pressed by a downward external force, the retaining edge 19 will move downward together with the button until it abuts against the unlocking member 26. At this time, the downward movement of the button may trigger a series of chain reactions, specifically depending on the password setting situation of the button. If it is in the password setting state, this pressing operation may change the relative position relationship between the button and the unlocking member 26, thereby affecting the unlocking process.

[0057] Upward movement state: When the button moves upward, the retaining edge 19 will eventually abut against the upper side wall of the lock housing 17, which is a common state of the button in the natural state or after reset. At this time, the button is in a standby state, waiting for the user's next operation instruction, such as pressing for password input or participating in the password change process.

[0058] It also includes a push plate 1 that can move back and forth. On the left and right sides of the push plate 1, there are respectively a plurality of protruding push hands 2. Between two adjacent push hands 2 on the same side, there is exactly one button corresponding to each other. This tight and orderly layout ensures that during the back and forth movement of the push plate 1, the push hands 2 can accurately contact the button and transmit power. In this design, the number of buttons is 10, and 5 buttons are respectively arranged on the left and right sides of the push plate 1. Such a symmetrical distribution not only ensures the balance of operation but also facilitates the user to remember and operate the password combination.

[0059] A coding column 3 (the coding column 3 is cylindrical) that can move up and down is connected inside the connection hole 13. As one of the core components for password setting and recognition, the protruding push block 4 provided on the coding column 3 is located between two adjacent push hands 2 in the front and back. A first moving groove 14 corresponding to the push block 4 is provided on the side wall of the column body portion 11. When the push plate 1 moves back and forth, the push hands 2 will move synchronously, and then push the push block 4 to move up and down in the first moving groove 14. Since the push block 4 and the coding column 3 are of an integral structure, the coding column 3 will also move up and down in the connection hole 13.

[0060] Similarly, a lock block 15 that is symmetrically arranged with respect to the center of the coding column 3 is also provided on the coding column 3. A second moving groove 16 corresponding to the lock block 15 is provided on the side wall of the column body portion 11. When the coding column 3 moves, the lock block 15 can also move smoothly in the second moving groove 16.

[0061] Collision parts 28 corresponding to the lock block 15 are respectively provided on the left and right sides of the unlocking member 26.

[0062] Two positioning holes 5 are provided on the column body portion 11 at intervals in the up and down direction, and a positioning portion 6 corresponding to the same is provided on the coding column 3. By connecting the positioning portion 6 with the positioning holes 5 at different positions, the up and down positions of the coding column 3 can be accurately positioned, and then the password state of the key can be determined. When the positioning portion 6 is connected to the upper positioning hole 5 on the column body portion 11, the key is in the empty code state. At this time, the key does not participate in the password combination, and the relevant unlocking restrictions of the unlocking member 26 will not be activated; when the positioning portion 6 is connected to the lower positioning hole 5 on the column body portion 11, the key is in the code setting state. At this time, the key plays a substantial role in the password system, works together with components such as the unlocking member 26, and controls the unlocking process.

[0063] When the push plate 1 moves back and forth, it can skillfully push the push block 4 to move up and down through the push hands 2, so that the positioning portion 6 on the coding column 3 switches positions between the two upper and lower positioning holes 5. Specifically, when the push plate 1 moves forward, the push hands 2 push the push block 4 to move upward, driving the entire coding column 3 to move upward, so that all keys enter the empty code state, which is equivalent to clearing all previously set passwords at one time; when the push plate 1 moves backward, the push hands 2 push the push block 4 to move downward. If some keys have been pressed before, these pressed keys will enter the code setting state, completing the setting of a new password.

[0064] Unlocking process:

[0065] When unlocking is required, the user first identifies the buttons in the coding state, and then presses down the buttons in the coding state. This operation causes the lock block 15 to move to the lower side of the collision portion 28, changing the blocking state of the left and right sides of the unlocking member 26. At this time, the unlocking member 26 is no longer restricted by the lock block 15 and can move forward, thereby triggering a series of unlocking actions, and finally realizing the opening of the padlock.

[0066] Code conversion process:

[0067] When the password needs to be changed, the operation process is more rigorous. First, all buttons need to be reset to the uppermost position to ensure that the system is in the initial standby state. Then, the push plate 1 moves forward, and the pusher 2 pushes the push block 4 on the button in the coding state to move upward. According to the linkage mechanism described above, all buttons enter the empty code state, which is equivalent to clearing the previous password settings. Then, the user presses the button that needs to be coded and moves it downward according to the new password requirements. After pressing, the push block 4 and the pusher 2 are at the same height. This step determines the key combination of the new password. Finally, the push plate 1 moves backward again, and the pusher 2 pushes the push block 4 on the button to move downward, so that all pressed buttons enter the coding state, completing the setting of the new password, and the button moves upward and resets to the uppermost position, waiting for the next unlocking or code changing operation.

[0068] The push plate 1 further includes a dial button 7 that can be rotated left and right. The dial button 7 is a key component for controlling the forward and backward movement of the push plate 1. The dial button 7 is located on the lower side of the push plate 1. The dial button 7 is rotatably connected to the shell 17 via a rotating shaft 71. This rotational connection allows the dial button 7 to rotate left and right around the rotating shaft 71, providing a basis for subsequently driving the push plate 1 to move.

[0069] The dial button 7 is provided with a linkage column 8 protruding upward, and the push plate 1 is provided with a linkage hole 9 corresponding to the linkage column 8. The linkage column 8 is inserted into the linkage hole 9. When the dial button 7 is rotated, the linkage column 8 will generate relative motion in the linkage hole 9, thereby driving the push plate 1 to move forward and backward. This connection method realized by the linkage column 8 and the linkage hole 9 can effectively convert the rotational motion of the dial button 7 into the linear motion of the push plate 1, ensuring the continuity and stability of the operation.

[0070] In order to facilitate the user to manually control the rotation of the dial button 7, a toggle portion 20 is provided on the dial button 7, and a slot 21 for the toggle portion 20 to extend is provided on the lower side of the lock housing 17. The user can directly operate the toggle portion 20 with a finger to drive the dial button 7 to rotate left and right. The size and position of the slot 21 are reasonably designed, which can ensure that the toggle portion 20 can be smoothly extended and flexibly operated, and can prevent foreign objects from entering the lock housing 17 and affecting the normal rotation of the dial button 7.

[0071] It also includes a spring 10 for resetting the dial button 7 that rotates left and right. When the dial button 7 rotates, the spring 10 is forced to undergo elastic deformation. After the rotation of the dial button 7 is released, the dial button 7 is reset under the action of the spring 10, and the corresponding push plate 1 is also reset.

[0072] The spring 10 is circular and coaxial with the rotating shaft 71. Two torsion arms 22 extend from both ends of the spring 10. The two torsion arms 22 are key parts for realizing the elastic deformation and reset function of the spring 10. A protruding abutment portion 23 is provided on the inner wall of the lock housing 17. The abutment portion 23 is located between the two torsion arms 22 and plays a role of fixing and limiting. A protruding swing arm 24 is provided on the dial button 7. The swing arm 24 is located between the two torsion arms 22.

[0073] When the user manually drives the dial button 7 to rotate through the toggle part 20, the swing arm 24 on the dial button 7 will swing with the rotation of the dial button 7. Since the swing arm 24 is located between the two torsion arms 22, the swing of the swing arm 24 will drive one of the torsion arms 22 to move, causing the spring 10 to undergo elastic deformation. In this process, the spring 10 stores elastic potential energy to prepare for the reset of the dial button 7. When the user releases the rotation operation of the dial button 7, the spring 10 will use its stored elastic potential energy to restore to its original state. During the process of the spring 10 restoring its original state, the torsion arm 22 will push the swing arm 24 to move in the opposite direction, thereby driving the dial button 7 to rotate in the opposite direction until the dial button 7 returns to its initial position and completes the reset. Since the dial button 7 is connected to the push plate 1 through the linkage column 8, the reset of the dial button 7 will also drive the push plate 1 to reset, so that the entire code change operating mechanism of the padlock returns to the initial state and is ready for the next operation.

[0074] In the code-changing structure of the padlock, the front and rear sides of the push handle 2 are designed as inclined surfaces 25 with the front side lower and the rear side higher. This simple but ingenious design is mainly to achieve the function of pushing and guiding the push block 4 to move up and down, and then complete the position switching of the coding column 3 to achieve the purpose of password setting and changing.

[0075] When the push plate 1 moves forward, the push handle 2 will move forward with the push plate 1. At this time, the push block 4 between the two adjacent push handles 2 will contact the front side of the push handle 2 moving forward. Since the front side of the push handle 2 is a slope 25 with a lower front side and a higher rear side, the push block 4 will slide upward along this slope 25 during the continuous forward movement of the push plate 1. Because the push block 4 is set on the coding column 3, the upward movement of the push block 4 will drive the coding column 3 to move upward in the connecting hole 13. When the coding column 3 moves upward, its positioning portion 6 will disengage from the positioning hole 5 on the lower side of the column part 11, and finally connect with the positioning hole 5 on the upper side, so that the key enters the empty code state. This inclined surface structure enables the linear forward movement of the push plate 1 to be smoothly and effectively converted into the upward movement of the push block 4 and the coding column 3, thereby realizing the switching of the password state.

[0076] When the push plate 1 moves backward, the pusher 2 moves backward along with the push plate 1. At this time, the push block 4 will contact the rear side of the pusher 2. Similarly, since the rear side of the pusher 2 is an inclined surface 25 that is lower at the front and higher at the rear, during the backward movement of the push plate 1, the push block 4 will slide downward along this inclined surface 25. The downward movement of the push block 4 drives the coding column 3 to move downward in the connecting hole 13. The positioning portion 6 of the coding column 3 will disengage from the upper positioning hole 5 and connect with the lower positioning hole 5, putting the key into the code setting state. This process enables the backward linear movement of the push plate 1 to be smoothly converted into the downward movement of the push block 4 and the coding column 3, completing the setting of a new password.

[0077] This inclined surface structure has many advantages. First of all, it simplifies the mechanical transmission structure. It does not require complex mechanisms such as gears and linkages. Only through simple inclined surface contact can the force transmission and the conversion of the movement direction be achieved, reducing the manufacturing cost and production difficulty. Secondly, the inclined surface structure makes the push block 4 move more smoothly during the up and down movement, reducing the occurrence of jamming and wear, and improving the reliability and service life of the entire code-changing structure. In addition, this design is also convenient for maintenance and repair. Once a failure occurs, it is easier to troubleshoot and repair.

[0078] In the overall structure of the padlock, the connecting seat 18 plays a key supporting and guiding role. It forms a vertical sliding connection with the column part 11 of the key, ensuring that the key can move stably up and down within the lock housing 17. The entry slot 181 opened on the left side wall of the connecting seat 18 is an important structural design for realizing the key reset function. The entry slot 181 provides a specific passage for the reset portion 182, enabling the reset portion 182 to smoothly enter and act on the key.

[0079] The left side wall of the connecting seat 18 is provided with an entry slot 181, and also includes a reset portion 182 corresponding to and connected to the entry slot 181. When the reset portion 182 enters the entry slot 181, it can push up the key, resetting the key to the upward movement state.

[0080] The reset portion 182 is a component that directly acts on the key to reset it. When the reset portion 182 enters the entry slot 181, it will contact the lower end of the key and apply an upward force, thereby pushing up the key and restoring the key to the upward movement state, that is, the initial standby state. This design ensures that the key can be accurately reset after each operation, preparing for the next password setting or unlocking operation.

[0081] All the reset parts 182 are connected as a whole through the reset member 183, and the reset member 183 can move left and right. This integrated design enables each reset part 182 to act synchronously, ensuring that all the keys can be pushed up and reset simultaneously. The reset member 183, as the key component connecting and driving the reset parts 182, its movement directly determines whether the reset parts 182 can smoothly enter the entry slot 181 and complete the key reset operation.

[0082] When a key reset operation is required, the user triggers the entire reset mechanism by pressing down the lock beam 29. After the lock beam 29 receives the downward pressure, it transmits this force to the associated reset member 183. The downward movement of the lock beam 29 drives the reset member 183 to move accordingly.

[0083] The rotatable end (right end) of the lock beam 29 extends backward to form a driving part 60. The cross-section of the driving part 60 is semi-circular. There is a driving block 61 protruding upward on the reset member 183, and the driving block 61 is located on the right side of the lock beam 29. When the lock beam 29 is in the locked state, pressing the lock beam 29 backward causes the right end of the lock beam 29 to collide with the driving block 61, driving the driving block 61 to move to the right. When the lock beam 29 is in the locked state, the flat part of the driving part 60 faces the driving block 61, and the distance from the flat part of the driving part 60 to the driving block 61 is less than the radius of the driving part 60. At this time, if the lock beam 29 rotates around its right end, the driving part 60 rotates, and the curved surface part of the driving part 60 contacts the driving block 61, which can drive the driving block 61 to move to the right. Therefore, as long as the lock beam 29 rotates, the driving part 60 can drive the reset member 183 and the reset parts 182 into the connection seat 18 and push up the key.

[0084] The flat part 601 of the driving part 60, the curved surface part 602 of the driving part 60.

[0085] The rear end of the driving part 60 is connected with a spring five 62 that can apply a forward elastic force to it. When the lock beam 29 is pressed backward, the spring five 62 is compressed.

[0086] As the reset member 183 moves, the associated reset parts 182 will also move accordingly. Since the reset parts 182 correspond to the entry slot 181, driven by the reset member 183, the reset parts 182 will accurately enter the entry slot 181. After entering the entry slot 181, the reset parts 182 will contact the bottom part of the key and gradually apply an upward force to overcome other possible resistances of the key and push up the key.

[0087] Inside the lock housing 17, there is a spring four 184 that applies a leftward elastic force to the reset member 183. The spring four 184 applies an elastic force to the reset member 183 to make the reset parts 182 leave the entry slot 181.

[0088] When the lock beam 29 moves downward, it will squeeze the reset member 183 to move.

[0089] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A code changing structure of a mechanical key padlock, comprising a key that can move up and down, characterized in that: It also includes a push plate that can be moved forward and backward, and a plurality of protruding push handles are respectively provided on the left and right sides of the push plate, and the front side and the rear side of the push handle are inclined surfaces with the front side being lower and the rear side being higher, and buttons are correspondingly provided between two adjacent push handles on the same side; The button is connected with a coding column that can move up and down, and a protruding push block is provided on the coding column, and the push block is located between two adjacent push handles in front and behind; Two positioning holes are arranged at intervals along the up-down direction on the key, and a positioning part is arranged on the coding column and is connected with the positioning holes to position the coding column; When the push plate moves forward and backward, the push block can be pushed up and down by the push handle, so that the positioning part on the coding column switches the position between the upper and lower positioning holes.

2. A code changing structure of a mechanical key padlock according to claim 1, characterized in that: The push plate is provided with a linkage hole corresponding to the linkage column, and also includes a spring for resetting the dial button that rotates left and right. The left and right rotation of the dial button drives the push plate to move forward and backward.

3. A code changing structure of a mechanical key padlock according to claim 2, characterized in that: The button includes a column part, the upper end of the column part is connected to a cap part, the column part is provided with a connecting hole running through its lower side, the coding column is connected in the connecting hole, the positioning hole is arranged on the column part, and a moving groove corresponding to the push block is opened on the side wall of the column part.

4. A code changing structure of a mechanical key padlock according to claim 3, characterized in that: The coding column is provided with a protruding locking block, the locking block and the pushing block are symmetrically arranged about the center of the coding column, and a second moving groove corresponding to the locking block is opened on the side wall of the column part.

5. The code changing structure of a mechanical key padlock according to claim 4, characterized in that: It also includes a lock shell, a connecting seat corresponding to the column part is provided in the lock shell, an opening is provided on the upper side of the lock shell for the cap part to extend out, and the cap part is provided with an anti-slip edge to prevent the key from falling out of the lock shell; a dial button is rotatably connected to the lock shell, a dial part is provided on the dial button, and a slot is provided on the lower side of the lock shell for the dial part to extend out.

6. A code changing structure of a mechanical key padlock according to claim 5, characterized in that: The spring 1 is circular and coaxial with the rotation center of the dial button. Two torsion arms extend from both ends of the spring 1. A protruding abutment portion is provided on the inner wall of the lock shell, and the abutment portion is located between the two torsion arms. The dial button is provided with a protruding swing arm, and the swing arm is located between the two torsion arms.

7. A padlock, characterized in that: The invention comprises a code changing structure as claimed in claim 6, wherein a lock opening member movable forward and backward and a spring 2 exerting a backward elastic force on the lock opening member are arranged in the lock housing, the lock opening member is U-shaped and opened forward, the button is located on the inner side of the lock opening member, and collision parts corresponding to the lock block are arranged on the left and right sides of the lock opening member; a lock beam is connected to the front side of the lock housing, and two holding arms corresponding to the two ends of the lock beam are arranged in the lock housing, and the rear end of the holding arm is rotatably connected to the lock housing, and the front end of the holding arm is tightly held on the lock beam under the action of the spring 3 and limits the lock beam from moving forward out of the housing; protruding pressing parts are arranged on the left and right sides of the lock opening member, and when the lock opening member moves forward, the pressing parts can force the holding arm to rotate and leave the lock beam; The unlocking piece is provided with a pushing portion protruding upward, and a pushing groove corresponding to the pushing portion is provided on the front side surface of the lock housing.

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