Mechanical coded lock

Abstract

The utility model relates to the field of mechanical locks, in particular to a mechanical coded lock. The lock comprises a lock tongue, a lock sleeve and a plurality of lock catches, the lock tongue is provided with a holding part and a rod part, and the rod part is provided with a plurality of lock teeth; the lock sleeve is arranged on the rod part in a sleeving manner, and a guide notch and a plurality of grooves are formed in the lock sleeve; the lock catch comprises a lock ring and a code wheel, the inner ring face of the lock ring is provided with a positioning groove and a curved bar which are matched with the lock teeth, the code wheel is detachably connected with the lock ring, and number correspondence is achieved through a limiting protrusion and a lock groove. And when all the positioning grooves are aligned with the guide notches, the spring bolt can slide to realize unlocking, and otherwise, the spring bolt is locked. In addition, the mechanical coded lock further comprises an insertion hole plate, a dismounting groove is formed in the contact face of the insertion hole plate and the lock sleeve, and the safety and convenience of the lock are improved. The mechanical coded lock achieves the technical effects that precise rotation of the coded wheels of the mechanical coded lock is improved, and user operation is facilitated.

Description

Technical Field

[0001] The present application relates to the field of mechanical locks, and in particular to a mechanical combination lock. Background Art

[0002] Combination locks are crucial for securing items. Traditional mechanical locks, such as padlocks and pin locks, rely on specific keys, which are easily lost, stolen, or copied, and are inconvenient to rekey. While electronic combination locks offer the advantages of diverse passwords and remote control, they rely on a power source and will not function during power outages or battery depletion. Their electronic components are also susceptible to malfunctions caused by electromagnetic interference and environmental factors.

[0003] Mechanical combination locks are valued for their characteristics of requiring no power supply and having a stable and reliable structure. However, the common mechanical combination locks on the market currently have a complex structure, which is not conducive to modifying the password. At the same time, the combination disk lacks a limit device, and the combination disk is difficult to rotate to a more precise position to cooperate with the lock tongue, resulting in the lock tongue being difficult to insert or remove from the lock body, which easily causes wear on the lock tongue and reduces the service life of the mechanical combination lock. Utility Model Content

[0004] The purpose of this application is to overcome the above technical problems and provide a mechanical password lock.

[0005] A mechanical combination lock comprising:

[0006] The lock tongue comprises a holding portion and a rod portion fixed to the holding portion and extending away from the holding portion, wherein the rod portion is provided with a plurality of locking teeth at intervals in the extending direction;

[0007] A locking sleeve, the locking sleeve comprising a guide notch and a plurality of grooves cooperating with the locking teeth, the locking sleeve being sleeved on the rod, and

[0008] Multiple lock buckles, multiple lock buckles are all sleeved on the surface of the lock sleeve and located between adjacent lock teeth, the lock buckle includes a lock ring and a password wheel sleeved on the lock ring, the inner ring surface of the lock ring is provided with a positioning groove that cooperates with the lock teeth, the inner ring surface of the lock ring is also connected to a curved rod extending along the circumferential direction of the inner ring surface, the end of the curved rod can cooperate with the groove, when all the positioning grooves are aligned with the guide notch, the lock tongue can slide along the guide notch for lock tongue insertion, when the password wheel rotates, the lock ring rotates with the password wheel, the positioning groove and the guide notch are staggered, and the lock tongue is clamped in the lock sleeve for locking.

[0009] By adopting the above solution, the curved rod and the groove cooperate to limit the lock buckle on the lock sleeve. When the lock buckle is in the limited state, the positioning groove can cooperate with the lock teeth, so that the lock tongue can be smoothly inserted into the lock sleeve or pulled out of the lock sleeve along the positioning groove.

[0010] In one embodiment, the outer annular surface of the lock ring cooperates with the inner annular surface of the code wheel and is detachably connected to the code wheel.

[0011] By adopting the above solution, the lock ring can be fixed in the password wheel and can also be disassembled and replaced, so that the mechanical password lock can change the password.

[0012] In one embodiment, the code wheel is in a polygonal shape and each face has a corresponding number. The outer array of the lock ring is provided with a plurality of limiting protrusions. The interior of the code wheel is provided with a lock groove that cooperates with the limiting protrusions. The lock groove corresponds to the number on the surface of the code wheel.

[0013] By adopting the above solution, the relative angles of the lock ring and the code wheel can be adjusted according to the positions of the numbers and fixed.

[0014] In one embodiment, the positioning grooves correspond to numbers on the surface of the code wheel.

[0015] By adopting the above solution, the positioning slot can be placed in the direction of the desired number, so that the mechanical combination lock can change the password.

[0016] In one embodiment, the groove array is distributed on the surface of the lock sleeve, and each number on the surface of the combination wheel has a corresponding groove on the surface of the lock sleeve.

[0017] By adopting the above solution, the password wheel can be limited every time it rotates a number, preventing others from deducing the password by feeling the position of the password wheel limit.

[0018] In one embodiment, the diameter of the groove is the same as the width of the guide notch.

[0019] By adopting the above solution, the guide notch can play the same limiting effect as the groove, further preventing others from deducing the password by feeling the position of the guide notch.

[0020] In one embodiment, the curved rod is arc-shaped and extends toward the inner side of the locking sleeve, and the extended end of the curved rod is a spherical ball.

[0021] By adopting the above solution, it is ensured that the bent rod can pass through the groove limit and at the same time the bent rod can slide out of the groove to complete the change of the number.

[0022] In one embodiment, the mechanical combination lock further includes a socket plate, which is embedded in the combination wheel near one end of the lock tongue and is detachably connected to the socket plate. The rod can pass through the socket plate. When the lock tongue is in a locked state, the surface of the holding portion in the direction of the rod abuts against the socket plate.

[0023] By adopting the above solution, the jack plate can seal and fix the mechanical combination lock.

[0024] In one embodiment, the contact surface between the jack plate and the lock sleeve is provided with a disassembly groove, and the disassembly groove is symmetrically arranged on both sides of the lock sleeve.

[0025] By adopting the above solution, the jack plate can be rotated through the symmetrically arranged disassembly slots to complete the disassembly of the jack plate.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By setting a curved rod inside the lock buckle that can cooperate with the lock sleeve groove, the lock buckle can be limited on the lock sleeve. When the lock buckle is in the limited state, the positioning grooves are in the same straight line, and the lock tongue can be smoothly inserted into or pulled out of the lock sleeve along the positioning groove, avoiding inaccurate rotation of the lock buckle, which causes the positioning grooves to be not in the same straight line, making it impossible for the lock tongue to be normally inserted into or pulled out of the lock sleeve.

[0028] 2. By dividing the lock into two parts, a password wheel and a lock ring, and setting multiple limiting protrusions in an array on the outside of the lock ring, and setting a lock groove inside the password wheel that cooperates with the limiting protrusions, the positioning groove can be placed to a position aligned with the target number to complete the password change.

[0029] 3. By distributing an array of grooves on the surface of the lock sleeve, with each groove corresponding to a number on the surface of the combination wheel, and setting the width of the guide notch to be the same as the diameter of the groove, the combination wheel can be limited each time it rotates to a corresponding number, and the resistance encountered when it leaves the limit position is the same, preventing others from deducing the combination by feeling the resistance and rotation path of the position where the curved rod passes through the groove or guide notch. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of a mechanical combination lock provided by this application.

[0031] Figure 2 This is an exploded view of a mechanical combination lock provided by this application.

[0032] Figure 3 It is a longitudinal cross-sectional view of a mechanical combination lock provided by the present application.

[0033] Figure 4 It is a transverse cross-sectional view of a mechanical combination lock provided by the present application.

[0034] Figure 5 It is a structural diagram of the lock tongue.

[0035] Figure 6 It is a structural diagram of the lock sleeve.

[0036] Figure 7 It is a structural diagram of the lock ring and the cipher wheel.

[0037] Figure 8 It is a structural diagram of the jack board.

[0038] Explanation of the accompanying reference numerals: 1. Lock tongue; 11. Holding part; 12. Rod; 121. Lock tooth; 2. Lock sleeve; 21. Guide notch; 22. Groove; 3. Lock buckle; 31. Lock ring; 311. Positioning groove; 312. Curved rod; 313. Limiting protrusion; 32. Combination wheel; 321. Lock slot; 4. Socket plate; 41. Disassembly slot. DETAILED DESCRIPTION

[0039] Therefore, it is necessary to provide a mechanical combination lock that can limit the position of the combination disk during the rotation of the combination lock.

[0040] See also Figure 1 , Figure 1 This is a structural schematic diagram of a mechanical combination lock provided in the present application, comprising a lock tongue 1, a lock sleeve 2 and a plurality of lock buckles 3.

[0041] Please also refer to Figure 2-4 , Figure 2 This is an exploded view of a mechanical combination lock provided in the present application, in which the lock tongue 1 includes a holding portion 11 and a rod portion 12. The holding portion 11 is used for hand holding to facilitate user operation. The rod portion 12 is fixedly connected to the holding portion 11 and extends in a direction away from the holding portion 11. A plurality of lock teeth 121 are arranged at intervals on the rod portion 12, and the lock teeth 121 can be rectangular to achieve the limitation of the lock sleeve 2. The spacing of the lock teeth 121 can be adjusted according to actual needs to adapt to lock buckles 3 of different widths. The holding portion 11 of the lock tongue 1 can be provided with an anti-slip pad to increase the user's grip and comfort. The material of the anti-slip pad can be rubber, silicone, etc., with good anti-slip performance and softness. The shape of the anti-slip pad can be round, rectangular, etc., and the specific shape depends on the user's usage habits and the design requirements of the product. The thickness and hardness of the anti-slip pad need to be properly controlled to ensure that the user is both firm and comfortable when operating.

[0042] Please also refer to 5-6. Figure 6This is a schematic diagram of the lock sleeve. The lock sleeve 2 includes a guide notch 21 and multiple grooves 22 that mate with the lock teeth 121. The lock sleeve 2 is fitted over the rod 12. The guide notch 21 guides the insertion and removal of the lock tongue 1, ensuring that it does not deviate from its path during movement. The lock catch 3 is fitted onto the surface of the lock sleeve 2 and positioned between adjacent lock teeth 121. The lock catch 3 is equipped with a positioning groove 311 and a curved rod 312. The curved rod 312 is arc-shaped and extends toward the inside of the lock sleeve 2. The curved rod 312 ends in a spherical ball. The groove 22 on the surface of the lock sleeve 2 is used to accommodate the ball at the end of the curved rod 312 of the lock buckle 3. When the positioning groove 311 is aligned with the guide notch 21, the ball at the end of the curved rod 312 is located in the groove 22, limiting the curved rod 312 so that the lock buckle 3 will not rotate at will, making the positioning groove 311 unable to align with the guide notch 21, and the lock tongue 1 can move smoothly along the positioning groove 311 and the guide notch 21. When the positioning groove 311 is not aligned with the guide notch 21, the lock tongue 1 is locked in the lock sleeve 2.

[0043] Please also refer to Figure 7 , Figure 7 The figure is a schematic diagram of the structure of the lock ring and the code wheel. The lock buckle 3 includes a lock ring 31 and a code wheel 32. The outer ring surface of the lock ring 31 mates with the inner ring surface of the code wheel 32 and is sleeved on the lock sleeve 2 for detachable connection with the code wheel 32. The positioning groove 311 and the bent rod 312 are located on the contact surface between the lock ring 31 and the lock sleeve 2. The positioning groove 311 and the bent rod 312 on the lock ring 31 can be processed by stamping, cutting, etc. to ensure precision and consistency. The code wheel 32 is polygonal in shape, with each side corresponding to a number. The outer array of the lock ring 31 is provided with a plurality of limiting protrusions 313. The inner part of the code wheel 32 is provided with a lock groove 321 that mates with the limiting protrusions 313. The lock groove 321 corresponds to the number on the surface of the code wheel 32. The limiting protrusions 313 and the lock groove 321 can be manufactured by mold injection molding or machining to ensure precision and stability.

[0044] The positioning groove 311 corresponds to the number on the surface of the password wheel 32. When the user needs to set the password, the positioning groove 311 is facing the direction of the number to be set, and the lock ring 31 is placed inside the password wheel 32. The limiting protrusion 313 on the outside of the lock ring 31 cooperates with the lock groove 321 inside the password wheel 32, so that the lock ring 31 and the password wheel 32 will not rotate relative to each other. The lock ring 31 is put on the lock sleeve 2, the positioning groove 311 is aligned with the guide notch 21, and the spherical part of the curved rod 312 cooperates with the groove 22. The setting of a single digit of the password of the mechanical combination lock is completed, and the subsequent operations are similar.

[0045] The grooves 22 on the surface of the lock sleeve 2 are distributed in an array on the surface of the lock sleeve 2, and each groove 22 corresponds to a number on the surface of the combination wheel 32. The diameter of the groove 22 is the same as the width of the guide notch 21. When the user needs to disrupt the combination of the mechanical combination lock, he continues to rotate the combination wheel 32, and the combination wheel 32 drives the lock ring 31 to rotate. Every time a new number is rotated to correspond to the guide notch 21, the spherical part of the curved rod 312 will be immersed in the groove 22, limiting the lock buckle 3. When the curved rod 312 rotates to the guide notch 21, the curved rod 312 will also be immersed in the guide notch 21. The edge of the guide notch 21 has been smoothed, and The width is the same as that of the groove 22, so the guide notch 21 and the groove 22 have the same limiting effect on the curved rod 312. Every time the curved rod 312 is moved out of the groove 22, the ball of the curved rod 312 will slide to the surface of the lock sleeve 2, and the curved rod 312 will deform toward the outside of the lock ring 31, generating friction between the lock sleeve 2 and the user. When operating the curved rod 312 to disengage the limiting state, there will be a damping feeling. Since the lock sleeve 2 will have the same damping and limiting effect every time the combination wheel 32 rotates a number, the user cannot infer the password of the mechanical combination lock by feeling the specific position of the curved rod 312 on the surface of the lock sleeve 2.

[0046] like Figure 8 As shown, Figure 8 This is a schematic diagram of the structure of a jack plate. The mechanical combination lock also includes a jack plate 4, which is embedded in the combination wheel 32 near one end of the lock tongue 1 and is threadedly connected to the jack plate 4. The contact surface between the jack plate 4 and the lock sleeve 2 is provided with disassembly slots 41, symmetrically located on either side of the lock sleeve 2. The disassembly slots 41 engage with the lock teeth 121. The connection between the jack plate 4 and the combination wheel 32 can be threaded, snap-fit, or other methods, depending on the product design requirements and manufacturing process. In this embodiment, the jack plate 4 is threadedly connected to the combination wheel 32. The jack plate 4 provides an additional fixing point, enhancing the stability of the combination wheel 32 and preventing it from loosening during use. The disassembly slots 41 can be rectangular, trapezoidal, or other shapes, depending on the outer diameter of the lock sleeve 2 and the shape of the lock teeth 121. The layout of the disassembly slots 41 can be symmetrical or uneven, depending on the product design requirements and user habits. The disassembly slots 41 provide a convenient removal path when the combination wheel 32 needs to be replaced or repaired, avoiding damage to the lock sleeve 2 and other components. The shape and position of the disassembly groove 41 need to match the shape and position of the lock tooth 121 to ensure that the normal operation of the lock tongue 1 is not affected during the disassembly process. The depth and width of the disassembly groove 41 need to be precisely controlled to ensure that the lock tooth 121 can smoothly enter the disassembly groove 41, while avoiding excessive gaps that cause the lock tongue 1 to shake.

[0047] When the user needs to set a password, the positioning groove 311 on the lock ring 31 is aligned with the number to be set on the password wheel 32, the lock ring 31 is inserted into the password wheel 32, the limiting protrusion 313 cooperates with the lock groove 321, the relative position of the lock ring 31 and the password wheel 32 is fixed, the direction of the positioning groove 311 is aligned with the direction of the guide notch 21, and then the lock buckle 3 is put on the lock sleeve 2. The remaining lock buckles 3 are put on the lock sleeve 2 in the same way. The remaining lock buckles 3 are put on the lock sleeve 2 in sequence to complete the setting of the password.

[0048] When all the combination wheels are set, at the end away from the lock sleeve 2, the internal thread of the jack plate 4 is matched with the external thread of the lock sleeve 2 and tightened until it is embedded in the combination wheel 32. At this time, the disassembly groove 41 is aligned with the guide notch 21, and the positioning groove 311 is also aligned with the guide notch 21. The lock tooth 121 can cooperate with the guide notch 21, the positioning groove 311 and the disassembly groove 41, and the rod 12 of the lock tongue 1 can be smoothly pushed into the lock sleeve 2. The lock buckle 3 is rotated to make the positioning groove 311 staggered with the guide notch 21. At this time, the lock tongue 1 is locked in the lock sleeve 2.

[0049] When unlocking, rotate the code wheel 32 according to the preset code. When all the grooves 22 are aligned, the ball at the end of the curved rod 312 comes out of the groove, and the lock ring 31 and the code wheel 32 return to a free state. At this time, gently pull the lock tongue 1 to complete the unlocking.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A mechanical password lock, characterized in that: include: A lock tongue (1) comprises a holding portion (11) and a rod portion (12) fixed to the holding portion (11) and extending away from the holding portion (11), wherein the rod portion (12) is provided with a plurality of locking teeth (121) at intervals in an extending direction; A locking sleeve (2), the locking sleeve (2) comprising a guide notch (21) and a plurality of grooves (22) cooperating with the locking teeth (121), the locking sleeve (2) being sleeved on the rod (12), and A plurality of lock buckles (3), wherein the plurality of lock buckles (3) are all sleeved on the surface of the lock sleeve (2) and located between adjacent lock teeth (121), the lock buckle (3) comprises a lock ring (31) and a password wheel (32) sleeved on the lock ring (31), the inner ring surface of the lock ring (31) is provided with a positioning groove (311) that matches the lock teeth (121), the inner ring surface of the lock ring (31) is further connected with a curved rod (312) extending along the inner ring surface, and the curved rod The end of (312) can cooperate with the groove (22). When all the positioning grooves (311) are aligned with the guide notch (21), the lock tongue (1) can slide along the guide notch (21) for plugging the lock tongue (1). When the password wheel (32) rotates, the lock ring (31) rotates following the password wheel (32). The positioning groove (311) and the guide notch (21) are staggered, and the lock tongue (1) is clamped in the lock sleeve (2) for locking.

2. A mechanical combination lock according to claim 1, characterized in that The outer ring surface of the lock ring (31) matches the inner ring surface of the cipher wheel (32) and is detachably connected to the cipher wheel (32).

3. A mechanical combination lock according to claim 2, characterized in that: The code wheel (32) is in a polygonal column shape and has corresponding numbers on each face. The outer array of the lock ring (31) is provided with a plurality of limiting protrusions (313). The interior of the code wheel (32) is provided with a lock groove (321) that cooperates with the limiting protrusion (313). The lock groove (321) corresponds to the numbers on the surface of the code wheel (32).

4. A mechanical combination lock according to claim 3, characterized in that: The positioning grooves (311) correspond to the numbers on the surface of the cipher wheel (32).

5. A mechanical combination lock according to claim 4, characterized in that: The grooves (22) are distributed in an array on the surface of the lock sleeve (2), and each number on the surface of the code wheel (32) has a corresponding groove (22) on the surface of the lock sleeve (2).

6. A mechanical combination lock according to claim 5, characterized in that: The diameter of the groove (22) is the same as the width of the guide notch (21).

7. A mechanical combination lock according to claim 6, characterized in that: The curved rod (312) is arc-shaped and extends toward the inner side of the locking sleeve (2), and the extended end of the curved rod (312) is a spherical ball.

8. The mechanical combination lock according to claim 1, characterized in that: The mechanical password lock further includes a socket plate (4), the socket plate (4) is embedded in the password wheel (32) near one end of the lock tongue (1) and is detachably connected to the socket plate (4), the rod (12) can pass through the socket plate (4), and when the lock tongue (1) is in a locked state, the surface of the holding portion (11) in the direction of the rod (12) abuts against the socket plate (4).

9. A mechanical combination lock according to claim 8, characterized in that: The contact surface between the jack plate (4) and the lock sleeve (2) is provided with a disassembly groove (41), and the disassembly groove (41) is symmetrically arranged on both sides of the lock sleeve (2).

10. A mechanical combination lock according to claim 9, characterized in that: The disassembly groove (41) cooperates with the locking tooth (121).

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