Code changing structure of mechanical key padlock and padlock

Abstract

The invention provides a code changing structure of a mechanical key padlock and the padlock. The padlock comprises a lock shell and a lock beam, and the lock beam is buckled with the lock shell. An unlocking piece capable of moving front and back and a second spring are arranged in the lock shell, the unlocking piece is in a U shape and is provided with a forward opening, holding arms corresponding to the two ends of the lock beam are further arranged, the rear ends of the holding arms are rotationally connected with the lock shell, the front ends of the holding arms hold the lock beam under the action of the third spring, the unlocking piece is located between the holding arms, and extrusion parts on the two sides of the unlocking piece can make the holding arms rotate to loosen the lock beam to achieve unlocking. A key capable of moving up and down is arranged in the lock shell and is in sliding connection with the connecting base, the push plate can move front and back, push handles on the two sides of the push plate correspond to the key, the push plate is driven to move through the linkage column and the linkage hole, and then the position of the coding column is changed to switch the key empty code state and the key code setting state. The push button can rotate left and right to drive the push plate, a reset part is further arranged, and the lock beam is pressed to drive the reset part to reset the key. The padlock is exquisite in structure and convenient to operate, and the padlock code changing and unlocking convenience and safety are effectively improved.

Description

Technical Field

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

[0002] As a common lock, padlocks are widely used in many fields such as daily life and industrial production. Traditional padlocks are usually composed 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 objects or places. With the development of technology and the improvement of user needs, mechanical key password padlocks have 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. There is no need to carry keys, which reduces the security risks caused by key loss or theft.

[0003] However, the existing mechanical keypad locks have many deficiencies in the code-changing structure. When changing codes, traditional mechanical code locks need to disassemble many parts of the lock body, and the operation process is extremely cumbersome and complicated. For example, the Chinese patent application number is CN200720053964.8, and the invention name is a lock body code-changing mechanism for a key-type mechanical code lock. Although the code-changing method has been improved to a certain extent, the shifting member still needs to be rotated before the code is changed, so that the limit plate moves to a specific position and the fixed core is in a rotatable state, and the code can be changed by operating the key. The operation process is still relatively complicated, and the quality and precision of the key are required to be 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 difficulty of production, but also increase the product price, which is not conducive to market promotion.

[0004] In summary, how to design a code-changing structure with simple structure and convenient operation has become a key problem that mechanical key padlock designers need to solve urgently. The present invention aims to provide an innovative code-changing structure and padlock of a mechanical key padlock to overcome the above-mentioned 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 technology, the present invention proposes a code changing structure of a mechanical key padlock and a padlock to solve the above technical problems.

[0006] The technical solution of the present invention is achieved in this way: A code changing structure of a mechanical key padlock includes a key that can move up and down. It also includes a push plate that can be moved forward and backward, with a plurality of protruding push handles on the left and right sides of the push plate, 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.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] By adopting the above technical solution, the beneficial effects of the present invention are as follows: 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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

[0020] 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.

[0021] Figure 1 It is a schematic diagram of the structure of the padlock of the present invention.

[0022] Figure 2 It is a schematic diagram of the structure inside the padlock of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the decomposed locking beam of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the unlocking member, the lock beam and the holding part of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the code conversion structure of the present invention.

[0026] Figure 6 It is a structural schematic diagram of the push plate of the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the button and the coding column of the present invention.

[0028] Figure 8 It is a schematic diagram of the structure of the push plate in the lock housing of the present invention.

[0029] Fig. 9 The structure of the push plate and the dial button of the present invention is shown in FIG. Figure 1 .

[0030] Fig.10 The structure of the push plate and the dial button of the present invention is shown in FIG. Figure 2 .

[0031] Fig.11 The present invention is a schematic structural diagram of the lock housing reset portion and reset member.

[0032] Fig.12 It is a schematic structural diagram of the locking beam, the resetting portion and the resetting member of the present invention.

[0033] Fig.13 It is a schematic structural diagram of the unlocking member, the push plate and the coding column of the present invention.

[0034] 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

[0035] 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.

[0036] For reference Figure 1-Figure 13 The present invention is described: 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Spring three 34 applies force to the holding arm 30, causing the front end of the holding arm 30 to tightly hold the lock beam 29 in a natural state, forming a stable restriction on the lock beam 29 from both sides, effectively preventing the lock beam 29 from accidentally moving forward and escaping from the lock shell 17, thereby ensuring the locking safety of the padlock.

[0041] The unlocking member 26 is located between the two holding arms 30, and the left and right sides of the unlocking member 26 are respectively provided with protruding pressing parts 31, which become the key structure for interacting with the holding arms 30. When the unlocking member 26 receives external force to move forward, the pressing part 31 moves forward synchronously with the displacement of the unlocking member 26, and the pressing part 31 contacts the holding arms 30, so that the holding arms 30 overcome the elastic force of the spring three 34 after being squeezed, and rotate outward around the rotation connection point at the rear end, thereby causing the front end of the holding arm 30 to leave the lock beam 29, releasing the restraint on the lock beam 29, and creating conditions for the unlocking movement of the lock beam 29.

[0042] The unlocking member 26 is provided with a pushing portion 32 protruding upward, and a pushing groove 33 corresponding to the pushing portion 32 is provided on the front side of the lock housing 17. When the user needs to unlock, the finger can accurately touch the pushing portion 32 through the pushing groove 33, and then apply an upward thrust. This thrust overcomes the elastic force of the second spring 27 and other possible small resistances, drives the unlocking member 26 to move upward, and starts the unlocking process. When the external force is removed, the unlocking member 26 automatically moves downward and resets under the elastic force of the second spring 27. At this time, the second spring 27 exerts its energy storage and energy release characteristics, pulls the unlocking member 26 back to the initial static position, and waits for the next unlocking operation instruction. In this process, the holding arm 30 will also follow the reset action of the unlocking member 26, and re-hold the lock beam 29 under the action of the third spring 34, restore the locked state of the padlock, and ensure that the padlock can continue to effectively perform the safety protection function.

[0043] After unlocking, when the lock beam 29 re-enters the lock housing 17 to lock, the lock beam 29 will squeeze the front end of the holding arm 30 and push the holding arm 30 to open.

[0044] The lock housing 17 is provided with buttons that can move up and down, and each button is composed of two parts. The cylindrical column part 11 is used as the main supporting structure, which has good guiding performance and can move stably in the vertical direction in 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 is convenient for the user to operate and press with his fingers. On the other hand, its size design is adapted to the opening on the upper side of the lock housing 17, ensuring that during the up and down movement of the button, the cap part 12 can be smoothly extended for user operation and can maintain a tight fit without shaking or jamming.

[0045] The connection hole 13 on the column part 11 and penetrating through the lower side thereof is a key design, which provides a structural basis for the subsequent connection and linkage with the coding column 3, so that the button and the coding column 3 can work together to realize complex password setting and unlocking functions.

[0046] A connection seat 18 corresponding to the column part 11 is provided on the lower side wall inside the lock housing 17. The connection seat 18 is in a circular ring shape. This design complements the cylindrical shape of the column part 11, and the two form a precise upward and downward sliding connection. It not only ensures the freedom of movement of the key in the vertical direction, but also limits its displacement in the horizontal direction, ensuring that the key can accurately perform the corresponding function every time it is operated.

[0047] In order to prevent the key from accidentally falling out of the lock housing 17, an anti-falling edge 19 is specially provided on the cap body 12. The size of the anti-falling edge 19 is slightly larger than the diameter of the opening on the upper side of the lock housing 17. When the key is in the normal up and down movement range, the anti-falling edge 19 will not interfere with the lock housing 17; but once the key is subject to abnormal external force and tends to fall out, the anti-falling edge 19 will be tightly against the upper side wall of the lock housing 17, and the key will be firmly fixed in the lock housing 17 by friction and structural blocking.

[0048] The button has two distinct positions that play a key role in the operation of the padlock: Pressing down: When the key is pressed downward by an external force, the anti-drop edge 19 will move down with the key until it contacts the unlocking member 26. At this time, the downward movement of the key may trigger a series of chain reactions, depending on the password setting of the key. If the key is in the code setting state, the pressing operation may change the relative position relationship between the key and the unlocking member 26, thereby affecting the unlocking process.

[0049] Upward movement state: When the key moves upward, the anti-slip edge 19 will eventually abut against the upper side wall of the lock housing 17, which is a common state of the key in a natural state or after reset. At this time, the key is in a standby state, waiting for the user's next operation instruction, such as pressing to enter a password or participate in the password change process.

[0050] It also includes a push plate 1 that can move forward and backward, and a plurality of protruding push handles 2 are respectively provided on the left and right sides of the push plate 1. A key is precisely corresponding between two adjacent push handles 2 on the same side. This compact and orderly layout ensures that the push handles 2 can accurately contact the keys and transmit power during the forward and backward movement of the push plate 1. In this design, the number of keys is 10, and 5 keys are respectively provided 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 users to remember and operate password combinations.

[0051] The connecting hole 13 is connected with a coding column 3 (the coding column 3 is cylindrical) that can move up and down. The coding column 3 is one of the core components for password setting and identification. The protruding push block 4 arranged on it is located between the two adjacent push handles 2 in the front and back. The side wall of the column part 11 is provided with a moving groove 14 corresponding to the push block 4. When the push plate 1 moves forward and backward, the push handle 2 will move synchronously with it, and then push the push block 4 to move up and down in the moving groove 14. Since the push block 4 and the coding column 3 are an integrated structure, the coding column 3 will also move up and down in the connecting hole 13.

[0052] Similarly, the coding column 3 is also provided with a locking block 15 symmetrically arranged with the push block 4 about its center, and a movable groove 2 16 corresponding to the locking block 15 is opened on the side wall of the column part 11. When the coding column 3 moves, the locking block 15 can also move smoothly in the movable groove 2 16.

[0053] The unlocking member 26 is provided with collision portions 28 corresponding to the locking block 15 on both sides thereof.

[0054] Two positioning holes 5 are provided at intervals along the vertical direction on the column part 11, and a corresponding positioning portion 6 is provided on the coding column 3. By connecting the positioning portion 6 with the positioning holes 5 at different positions, the upper and lower 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 positioning hole 5 on the upper side of the column part 11, the key is in an 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 positioning hole 5 on the lower side of the column part 11, the key is in a code setting state. At this time, the key plays a substantial role in the password system, and works in conjunction with the unlocking member 26 and other components to control the unlocking process.

[0055] When the push plate 1 moves forward and backward, the push handle 2 can cleverly push the push block 4 to move up and down, so that the positioning part 6 on the coding column 3 can switch positions between the upper and lower positioning holes 5. Specifically, when the push plate 1 moves forward, the push handle 2 pushes the push block 4 to move upward, driving the coding column 3 to move upward as a whole, so that all keys enter the empty code state, which is equivalent to clearing all set passwords at one time; when the push plate 1 moves backward, the push handle 2 pushes 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 the new password.

[0056] Unlocking process: 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.

[0057] Code conversion process: 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] When the push plate 1 moves backward, the push handle 2 moves backward with the push plate 1. At this time, the push block 4 will contact the rear side of the push handle 2. Also, because the rear 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 downward along this slope 25 during the backward movement of the push plate 1. The downward movement of the push block 4 drives the coding column 3 to move downward in the connecting hole 13, and the positioning portion 6 of the coding column 3 will be separated from the positioning hole 5 on the upper side and connected to the positioning hole 5 on the lower side, so that the key enters the coding state. This process allows the backward linear motion of the push plate 1 to be smoothly converted into the downward motion of the push block 4 and the coding column 3, completing the setting of the new password.

[0067] This inclined plane structure has many advantages. First, it simplifies the mechanical transmission structure, does not require complex gears, connecting rods and other mechanisms, and can achieve force transmission and movement direction conversion through simple inclined plane contact, reducing manufacturing costs and production difficulties. Secondly, the inclined plane structure makes the push block 4 more stable during the up and down movement, reduces the occurrence of jamming and wear, and improves the reliability and service life of the entire code-changing structure. In addition, this design is also easy to maintain and repair, and once a fault occurs, it is easier to troubleshoot and repair.

[0068] In the overall structure of the padlock, the connection seat 18 plays a key supporting and guiding role. It forms an up-and-down sliding connection with the cylindrical part 11 of the key, ensuring that the key can stably move up and down in the lock housing 17. The entry groove 181 provided on the left side wall of the connection seat 18 is an important structural design for realizing the key reset function. The entry groove 181 provides a specific channel for the reset part 182, so that the reset part 182 can smoothly enter and work with the key.

[0069] The left side wall of the connecting seat 18 is provided with an entry slot 181 and also includes a reset portion 182 correspondingly connected to the entry slot 181 . The reset portion 182 enters the entry slot 181 to lift the key and reset the key to an upward moving state.

[0070] The reset part 182 is a component that directly acts on the key to reset it. When the reset part 182 enters the entry slot 181, it contacts the lower end of the key and exerts an upward force, thereby lifting the key and restoring the key to the upward moving state, that is, the initial standby state. This design ensures that the key can be accurately reset after each operation, ready for the next password setting or unlocking operation.

[0071] 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 allows each reset part 182 to move synchronously, ensuring that all keys can be lifted and reset at the same time. The reset member 183 is a key component that connects and drives the reset part 182. Its movement directly determines whether the reset part 182 can smoothly enter the entry slot 181 and complete the key reset operation.

[0072] When the key needs to be reset, the user triggers the entire reset mechanism by pressing down on the lock beam 29. After the lock beam 29 is subjected to 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.

[0073] The rotatable end (right end) of the locking beam 29 extends backwards out of the driving part 60, and the cross section of the driving part 60 is semicircular. The reset member 183 is provided with a driving block 61 protruding upwards, and the driving block 61 is located on the right side of the locking beam 29. When the locking beam 29 is in the locked state, the locking beam 29 is pressed backwards, and the right end of the locking beam 29 collides with the driving block 61, driving the driving block 61 to move rightward. When the locking beam 29 is in the locked state, the plane part of the driving part 60 faces the driving block 61, and the distance from the plane 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 locking 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 rightward. Therefore, as long as the locking beam 29 rotates, the driving part 60 can drive the reset member 183 and the reset part 182 to enter the connecting seat 18 to lift the key.

[0074] The flat surface portion 601 of the driving portion 60 and the curved surface portion 602 of the driving portion 60 .

[0075] The rear end of the driving portion 60 is connected to a spring 5 62 which can apply a forward elastic force thereto. When the locking beam 29 is pressed backward, the spring 5 62 is compressed.

[0076] As the reset member 183 moves, the reset portion 182 connected thereto also moves. Since the reset portion 182 corresponds to the entry slot 181, driven by the reset member 183, the reset portion 182 will accurately enter the entry slot 181. After entering the entry slot 181, the reset portion 182 will contact the bottom of the key and gradually apply force upward to overcome other resistances that the key may encounter and lift the key.

[0077] A spring four 184 is provided in the lock housing 17 to apply 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 portion 182 leave the entry groove 181.

[0078] The downward movement of the locking beam 29 will squeeze the reset member 183 to move.

[0079] 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. 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, with a plurality of protruding push handles on the left and right sides of the push plate, 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. The code changing structure of a mechanical key padlock according to claim 5, characterized in 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.

8. A padlock, characterized in that: The invention comprises a code changing structure as claimed in claim 6 or 7, 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, 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 extrusion parts are arranged on the left and right sides of the lock opening member, and when the lock opening member moves forward, the extrusion 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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