Mechanical coded lock

Abstract

The utility model relates to the technical field of locks, and discloses a mechanical coded lock, which comprises a lock seat, the lock cylinder module is rotatably arranged on the lock seat, a handle is arranged on the lock seat, and the lock cylinder module is driven to rotate relative to the lock seat by rotating the handle, so that unlocking or locking of the mechanical coded lock is achieved; the password wheel assembly is arranged between the lock seat and the handle; the password wheel assembly comprises a plurality of password wheels, a slope part is arranged on the handle, and the password wheels are exposed out of the slope part; the plurality of code wheels are shifted to correct codes, so that the locking of the code wheel assembly on the handle is relieved; when a user holds the handle to unlock the lock, the thumb of the user naturally extends towards the slope part, and the thumb can touch the password wheels in the swing range on the slope part, so that the password switching action and the handle rotating action can be continuously completed in a single-hand holding state. The mechanical coded lock has the advantages that the mechanical coded lock utilizes ergonomics, the comfort level and the use feeling of a user are improved, and the mechanical coded lock is convenient to operate and unlock.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and in particular to a mechanical combination lock. Background Technology

[0002] Compared to traditional key locks and electronic locks, mechanical combination locks achieve both keyless and electricity-free operation. They offer advantages such as ease of use, high stability, and long service life. They are frequently used on cabinet and box doors.

[0003] Existing mechanical combination locks require users to sequentially move multiple combination wheels to the correct combination before turning the knob, which in turn rotates the bolt to unlock the lock. This process involves a large range of hand movement, lacks fluidity, and is not ergonomically designed, negatively impacting the user experience. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a mechanical combination lock that utilizes ergonomics to improve user comfort and usability, and is easy to operate and unlock.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a mechanical combination lock, comprising:

[0006] Lock seat;

[0007] A lock cylinder module is rotatably mounted on the lock base, and a handle is provided on the lock base. By rotating the handle, the lock cylinder module is driven to rotate relative to the lock base, thereby unlocking or locking the mechanical combination lock.

[0008] A combination wheel assembly is disposed between the lock base and the handle, and can lock the handle to the lock base; the combination wheel assembly includes multiple combination wheels, the handle has a ramp portion, and the multiple combination wheels protrude from the ramp portion; by turning the multiple combination wheels to the correct combination, the locking of the combination wheel assembly to the handle is released;

[0009] When a user holds the handle to unlock the lock: their thumb naturally extends towards the ramp, and the range of the thumb's swing on the ramp can reach multiple of the combination wheels, so that the combination switching action and the handle rotation action can be completed continuously in a single-handed holding state.

[0010] Furthermore, the handle includes an adapter and a grip portion. The adapter is rotatably mounted on the lock seat, and the ramp portion is located on the adapter. One end of the grip portion is connected to the adapter, and the other end gradually moves away from the rotation center of the handle, so as to lengthen the lever arm when the user turns the handle.

[0011] Furthermore, the plurality of the password wheels are arranged side by side and coaxially at the ramp, and their axial direction is perpendicular to the grip portion;

[0012] When a user holds the handle with one hand to unlock, the range of motion of their thumb on the ramp can encompass all the combination wheels.

[0013] Furthermore, the gripping part is configured to be flat, having an inner arc surface and an outer arc surface that are arranged opposite to each other, the inner arc surface being convex inward and the outer arc surface being convex outward;

[0014] When a user holds the handle to unlock the door: their thumb extends toward the ramp, the other four fingers rest on the inner arc surface, and their palm can rest against the outer arc surface.

[0015] Furthermore, the cross-sectional area of ​​the grip portion gradually decreases from the end closer to the adapter to the end farther away from the adapter.

[0016] Furthermore, the inclination angle of the slope is between 35 degrees and 37 degrees.

[0017] Furthermore, one end of the handle has a mounting cavity, and the ramp portion is provided with a plurality of through holes communicating with the mounting cavity;

[0018] The cipher wheel assembly is disposed in the mounting cavity, with multiple cipher wheels respectively located in the multiple through holes, and the cipher wheel portions protruding from the through holes.

[0019] Furthermore, the lock cylinder module includes a lock cylinder, and one end of the lock cylinder has a mounting plate, which is detachably and fixedly connected to the handle;

[0020] One end of the lock base has a mounting platform, the lock cylinder passes through the lock base, and the mounting plate is rotatably mounted on the mounting platform;

[0021] The mounting platform has multiple shift holes along its circumference on the side near the mounting plate. The mounting plate has a shift ball, which can partially protrude towards the mounting platform and be engaged in the shift holes. A spring is provided between the shift ball and the handle, with one end of the spring abutting against the shift ball and the other end abutting against the handle. When the handle is rotated to unlock or lock, the shift ball can be moved to switch between the multiple shift holes.

[0022] Furthermore, the combination wheel assembly is detachably disposed between the handle and the mounting plate, so that when the lock cylinder is removed from the handle, the combination wheel assembly can be removed entirely from the handle.

[0023] The combination wheel assembly also includes a mounting base, a locking plate, a wheel axle, and multiple coupling wheels. The wheel axle is disposed on the mounting base, and the multiple coupling wheels are rotatably mounted on the wheel axle in sequence. The multiple combination wheels correspond one-to-one with the multiple coupling wheels, and the combination wheels are mounted on the coupling wheels. The locking plate is movably disposed on the mounting base, and the locking plate has a locking part. The multiple coupling wheels can drive the locking plate.

[0024] The lock base has multiple lock slots along its circumference. When the multiple combination wheels are turned to the correct combination, the locking part disengages from the lock slot, releasing the handle from locking. The combination wheels can drive the lock plate through the coupling wheel, causing the locking part to lock into the lock slot and lock the handle.

[0025] Furthermore, the lock cylinder module also includes a bolt, which is fixedly connected to the end of the lock cylinder away from the mounting plate.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects:

[0027] 1. In this utility model, the handle has a sloping section from which multiple combination wheels protrude, facilitating easy operation by the user when holding the handle. When the user unlocks with one hand, their thumb naturally extends towards the sloping section, and the thumb's range of motion on the sloping section allows it to reach each combination wheel, enabling the combination switching action and handle rotation to be completed continuously with one hand. During this process, the unlocking action is fluid, the user's hand movement is minimal, and no arm assistance is required. Operation is simple, unlocking efficiency is high, the spatial layout is reasonable, and the structure is compact, effectively solving the problems of cumbersome operation and poor continuity in traditional mechanical combination locks. Furthermore, this layout effectively utilizes ergonomics, significantly improving user comfort and overall user experience.

[0028] 2. In this utility model, the combination wheels are arranged side by side and coaxially on the ramp, and their axis is perpendicular to the grip part of the handle. When the user holds the handle with one hand to unlock, the swing range of his thumb on the ramp can cover all the combination wheels. The thumb can easily touch and move all the combination wheels while maintaining the grip posture. The other four fingers do not need to move, and there is no need for wrist and arm to assist in the movement, which improves the convenience and efficiency of operation.

[0029] 3. In this utility model, the handle includes an adapter and a grip. The adapter can provide installation space for other components such as the password wheel assembly, while one end of the grip is connected to the adapter and the other end gradually moves away from the rotation center of the handle, so that the user has a longer lever arm and less effort when turning the handle.

[0030] 4. In this utility model, the grip part of the handle includes an inner arc surface and an outer arc surface that are arranged opposite to each other. When the user holds the handle to unlock, the thumb extends to the ramp, the other four fingers rest on the inner arc surface, and the palm can be placed on the outer arc surface. The design meets ergonomic requirements and can effectively improve the user's grip feel.

[0031] 5. In this utility model, a stop ball is provided on the mounting plate of the lock cylinder, and a spring is provided between the stop ball and the handle, the spring tensioning the stop ball. The stop ball can engage with multiple stop holes on the lock seat. When the user turns the handle to unlock or lock, the stop holes can switch between multiple stop holes, allowing the user to determine whether the unlocking or locking is in place, thus improving the user experience. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the mechanical combination lock of this utility model;

[0033] Figure 2 for Figure 1 Side view;

[0034] Figure 3 An exploded view of a mechanical combination lock;

[0035] Figure 4 for Figure 1 A schematic diagram of the structure after removing the handle;

[0036] Figure 5 for Figure 4 A structural diagram from another perspective;

[0037] Figure 6 A schematic diagram of a mechanical combination lock after removing the lock base and fixing nut;

[0038] Figure 7 This is a schematic diagram of the lock base structure;

[0039] Figure 8 A cross-sectional view of a mechanical combination lock along the shift knob;

[0040] Figure 9 This is an assembly diagram of the combination wheel assembly and the handle;

[0041] Figure 10 This is a schematic diagram of the cryptographic wheel assembly;

[0042] Figure 11 A schematic diagram of the cipher wheel assembly after removing the mounting bracket;

[0043] Figure 12 for Figure 11 Exploded view;

[0044] Figure 13 for Figure 12A structural diagram from another perspective.

[0045] In the picture:

[0046] 1. Lock base; 10. Mounting platform; 101. Stop hole; 102. Lock groove;

[0047] 2. Lock cylinder module; 21. Lock cylinder; 210. Mounting plate; 22. Stop ball; 23. Spring; 24. Lock tongue;

[0048] 3. Handle; 31. Adapter; 32. Grip; 300. Sloping section; 301. Through hole; 302. Password changing hole; 310. Mounting cavity; 321. Inner arc surface; 322. Outer arc surface;

[0049] 4. Combination wheel assembly; 40. Combination wheel; 41. Mounting base; 42. Lock plate; 420. Locking part; 43. Wheel axle; 44. Coupling wheel; 440. Notch; 45. Spring; 46. Return spring; 47. Tension spring;

[0050] 5. Secure the nuts. Detailed Implementation

[0051] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0052] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0053] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0056] Mechanical combination locks, compared to traditional mechanical key locks, eliminate the hassle of not being able to unlock the door if you forget your keys. Compared to electronic locks, they are completely electricity-free, offer better stability, and have a longer lifespan. Currently, with mechanical combination locks, users must first use their fingers to sequentially move multiple combination wheels to the correct combination, and then hold and turn the unlocking knob to unlock the door. This process is cumbersome and provides a poor user experience.

[0057] like Figures 1-3 and combined Figures 12-13 As shown, the mechanical combination lock of this embodiment mainly includes: a lock base 1, a lock cylinder module 2, and a combination wheel assembly 4. The lock cylinder module 2 is rotatably mounted on the lock base 1, and a handle 3 is mounted on the lock base 1. By rotating the handle 3, the lock cylinder module 2 is driven to rotate relative to the lock base 1, thereby unlocking or locking the mechanical combination lock. The combination wheel assembly 4 is disposed between the lock base 1 and the handle 3, and can lock the handle 3 onto the lock base 1. The combination wheel assembly 4 includes multiple combination wheels 40, and the handle 3 has a ramp portion 300 from which the multiple combination wheels 40 protrude. By moving the multiple combination wheels 40 to the correct combination, the locking of the handle 3 by the combination wheel assembly 4 is released.

[0058] In actual use, when the user holds the handle 3 to unlock, their thumb naturally extends towards the ramp 300, and the range of thumb movement on the ramp 300 can reach multiple combination wheels 40, allowing the combination switching action and the handle 3 rotation action to be completed continuously while holding the lock with one hand. Essentially, the mechanical combination lock of this embodiment can achieve some of the unlocking steps of a fingerprint lock.

[0059] In this embodiment, the handle 3 has a ramp 300 from which multiple combination wheels 40 protrude, facilitating the user's movement of the combination wheels 40 while holding the handle 3. When the user unlocks with one hand while holding the handle 3, the user's thumb naturally extends towards the ramp 300, and the thumb's range of motion on the ramp 300 allows it to reach each combination wheel 40, enabling the combination switching action and the handle 3 rotation action to be completed continuously while holding the lock with one hand. During this process, the unlocking action is smooth, the user's hand movement is minimal, and no arm assistance is required. The operation is simple, the unlocking efficiency is high, the spatial layout is reasonable, and the structure is compact, effectively solving the problems of cumbersome operation and poor continuity in traditional mechanical combination locks. Furthermore, this layout makes good use of ergonomics, effectively improving user comfort and usability.

[0060] Furthermore, combined Figures 1-5 As shown, in this embodiment, the handle 3 includes an adapter 31 and a grip 32. The adapter 31 is rotatably mounted on the lock base 1 and is located at the front of the lock base 1. Multiple combination wheels 40 are arranged side-by-side and coaxially at the ramp 300, with their axes perpendicular to the grip 32. When a user holds the handle 3 with one hand to unlock, the swing range of their thumb on the ramp 300 can encompass all the combination wheels 40, resulting in a compact structural arrangement.

[0061] The inclination angle of the ramp portion 300 is between 35 and 37 degrees. For example, the optimal inclination angle of the ramp portion 300 is 36 degrees. It should be explained that when the surface of the ramp portion 300 is a plane, the angle between this plane and the vertical plane is between 35 and 37 degrees. When the surface of the ramp portion 300 is a curved surface, the angle between the plane tangent to the curved surface and the vertical plane is between 35 and 37 degrees. This makes the design of the mechanical combination lock in this embodiment more ergonomic.

[0062] Specifically, the illustration in this embodiment shows the case where there are three combination wheels 40, but it can also be set to more, such as four or five. When there are three combination wheels 40, when the user holds the handle 3 with one hand to unlock, their thumb naturally extends towards the ramp 300. The inclination direction of the ramp 300 basically coincides with the flexion and extension trajectory of the thumb joint. The thumb directly points to the middle combination wheel 40 (i.e., the second combination wheel 40). When the thumb swings to the left, it can easily cover the first combination wheel 40, and when the thumb swings to the right, it can easily cover the third combination wheel 40. That is, the swing range of the thumb on the ramp 300 can encompass all the combination wheels 40. In this scenario, the inclination direction of the ramp 300 basically coincides with the flexion and extension trajectory of the thumb joint, and the unlocking operation does not require arm assistance.

[0063] In actual use, the combination wheels 40 of this embodiment are arranged side by side and coaxially on the ramp 300, and their axis direction is perpendicular to the grip part 32 of the handle 3. When the user holds the handle 3 with one hand to unlock, the swing range of his thumb on the ramp 300 can cover all the combination wheels 40. The thumb can easily touch and move all the combination wheels 40 while maintaining the grip posture. The other four fingers do not need to move, and there is no need for wrist and arm to assist in the movement, which improves the convenience and efficiency of operation.

[0064] The grip portion 32 is configured in a flat shape, having an inner arc surface 321 and an outer arc surface 322 arranged opposite to each other. The inner arc surface 321 convexes inward, and the outer arc surface 322 convexes outward. The curvature of the inner arc surface 321 is greater than that of the outer arc surface 322. When the user holds the handle 3 to unlock, their thumb extends towards the ramp portion 300, the other four fingers rest on the inner arc surface 321, and their palm rests against the outer arc surface 322. Furthermore, the cross-sectional area of ​​the grip portion 32 gradually decreases from the end closer to the adapter 31 to the end farther away from the adapter 31, which facilitates the manufacturing of the handle 3. That is, during die casting or injection molding of the handle 3, it ensures that the handle 3 can be easily demolded. At the same time, the cross-sectional area is larger at the end connected to the rotating head and smaller at the end farther away from the rotating head, ensuring the structural strength of the grip portion 32 and preventing root breakage during repeated rotation.

[0065] In actual use, the grip portion 32 of the handle 3 in this embodiment includes an inner arc surface 321 and an outer arc surface 322 that are arranged opposite to each other. When the user holds the handle 3 to unlock, the thumb extends to the ramp portion 300, the other four fingers rest on the inner arc surface 321, and the palm can be placed on the outer arc surface 322. The design meets ergonomic requirements and can effectively improve the user's grip feel.

[0066] Furthermore, the handle 3 is rotatably connected to the lock base 1 via an adapter 31. Specifically, the adapter 31 is rotatably mounted on the mounting platform 10 of the lock base 1. The adapter 31 has a mounting cavity 310, which provides space for the installation of components such as the combination wheel assembly 4 and the lock cylinder module 2. The ramp portion 300 is located on the adapter 31, and one end of the grip portion 32 is connected to the adapter 31. Specifically, the adapter 31 and the grip portion 32 are integrally formed. For example, the handle 3 is preferably made of metal (such as aluminum alloy, zinc alloy, etc.), in which case the adapter 31 and the grip portion 32 can be integrally die-cast. Alternatively, the handle 3 can be made of plastic, in which case the adapter 31 and the grip portion 32 can be integrally injection molded. Furthermore, the other end of the grip portion 32 gradually moves away from the rotation center of the handle 3, thereby lengthening the lever arm when the user rotates the handle 3. Understandably, in this embodiment, the handle 3 and the lock cylinder 21 are detachably fixedly connected, and both the handle 3 and the lock cylinder 21 have the central axis of the lock cylinder 21 as their rotation center. That is, in this embodiment, the rotation center of the handle 3 is the central axis of the lock cylinder 21.

[0067] In practical use, the handle 3 of this embodiment includes an adapter 31 and a grip 32. The adapter 31 provides installation space for other components such as the combination wheel assembly 4, while one end of the grip 32 is connected to the adapter 31, and the other end gradually moves away from the rotation center of the handle 3. This makes the lever arm longer and the operation less strenuous when the user rotates the handle 3. That is, by gripping the extended grip 32, the user experiences a longer lever arm because one end of the grip 32 gradually moves away from the rotation center of the handle 3, making the operation less strenuous compared to turning a knob to unlock.

[0068] A mounting cavity 310 is provided at one end of the handle 3. Specifically, a mounting cavity 310 is provided on the adapter 31 of the handle 3. The ramp portion 300 is provided with multiple through holes 301 communicating with the mounting cavity 310. That is, in the figure of this embodiment, three combination wheels 40 are provided, and correspondingly, three through holes 301 are provided on the ramp portion 300. The combination wheel assembly 4 is disposed in the mounting cavity 310, and the multiple combination wheels 40 are respectively located in the multiple through holes 301, and the combination wheels 40 partially protrude from the through holes 301. That is, the three combination wheels 40 partially protrude from the three through holes 301, that is, the combination wheels 40 are themselves installed in the mounting cavity 310, but a part of them protrudes from the through holes 301, which makes it convenient for the user to turn the combination wheels 40.

[0069] like Figures 4-8As shown in this embodiment, the lock cylinder module 2 mainly includes a lock cylinder 21 and a bolt 24. The main structure of the lock cylinder 21 is shaft-shaped, and a mounting plate 210 is provided at one end of the lock cylinder 21. The mounting plate 210 is detachably fixedly connected to the handle 3. Specifically, the mounting plate 210 is provided with positioning holes and multiple through holes through which screws can pass. The adapter 31 of the handle 3 is provided with positioning protrusions corresponding to the positioning holes and threaded holes corresponding to the multiple through holes. The assembly and positioning between the handle 3 and the lock cylinder 21 are achieved by the cooperation of the positioning protrusions and the positioning holes. The detachable connection between the handle 3 and the lock cylinder 21 is achieved by the multiple screws passing through the through holes on the mounting plate 210 and threaded into the threaded holes on the handle 3. That is, the detachable connection between the handle 3 and the lock cylinder module 2 is achieved. When it is necessary to disassemble the lock cylinder module 2 and the handle 3, the multiple screws can be turned. In this embodiment, the bolt 24 is fixedly connected to the end of the lock cylinder 21 furthest from the mounting plate 210. The mechanical combination lock achieves direct locking and unlocking through the rotation of the bolt 24. For example, when the bolt 24 rotates to the point of interfering with the door frame, it prevents the door from detaching from the frame, thus completing the locking process. In the locked state, when the bolt 24 rotates approximately 90 degrees, it no longer interferes with the door frame and no longer prevents the door from detaching, thus unlocking the lock and allowing the door to be opened.

[0070] In this embodiment, the lock seat 1 has an external thread on its outer periphery, and a fixing nut 5 is provided on the external thread. The fixing nut 5 can be used to fix the lock seat 1 to the door body. The lock seat 1 also has two anti-rotation planes (not marked in the figure) on its outer periphery. The two anti-rotation planes cooperate with the door body to ensure that the lock seat 1 will not rotate after being installed on the door body.

[0071] A mounting platform 10 is provided at one end of the lock base 1. The lock cylinder 21 passes through the lock base 1, and the mounting plate 210 is rotatably mounted on the mounting platform 10. The mounting plate 210 is circular, and a circular groove matching the mounting plate 210 is provided on the mounting platform 10. The mounting plate 210 is rotatably mounted in the circular groove. Specifically, a plurality of stop holes 101 are provided circumferentially on the side of the mounting platform 10 near the mounting plate 210. A total of four stop holes 101 are evenly distributed along the circumference of the mounting platform 10. The phase angle between two adjacent stop holes 101 differs by ninety degrees. The stop hole 101 is a concave spherical surface, facilitating the insertion and disengagement of the stop ball. The mounting plate 210 is provided with a gear shift ball, which can partially protrude towards the mounting platform 10 and be inserted into the gear shift hole 101; a spring 23 is provided between the gear shift ball and the handle 3, one end of the spring 23 abuts against the gear shift ball, and the other end of the spring 23 abuts against the handle 3; when the handle 3 is turned to unlock or lock, the gear shift ball can be driven to switch between multiple gear shift holes 101.

[0072] In practical use, in this embodiment, a stop ball is provided on the mounting plate 210 of the lock cylinder 21. A spring 23 is provided between the stop ball and the handle 3, and the spring 23 tensions the stop ball. The stop ball can engage with multiple stop holes 101 on the lock base 1. When the user turns the handle 3 to unlock or lock, the stop holes 101 can switch between multiple stop holes 101, allowing the user to determine whether the unlocking or locking is complete, thus improving the user experience. That is, the engagement between the stop ball 22 and the stop holes 101 can provide feedback to the user through sound and feel, promptly reminding the user that the turn has been completed.

[0073] The gear shift groove is located on the mounting platform 10 of the lock base 1, which is easier and simpler to process compared to other locations on the lock base 1. Similarly, it is easier and simpler to process the hole for the gear shift ball to pass through on the mounting plate 210 than to process it in other locations.

[0074] like Figures 9-13 and combined Figures 3-5 As shown, the combination wheel assembly 4 in this embodiment is detachably disposed between the handle 3 and the mounting plate 210. When the lock cylinder 21 is removed from the handle 3, the combination wheel assembly 4 can be removed from the handle 3 as a whole.

[0075] The combination wheel assembly 4 is modular, so it can be installed into the housing of the handle 3 as a whole, or it can be removed from the handle 3 as a whole. This makes it easy to assemble and disassemble the combination wheel assembly 4. In addition, if replacement or repair is needed in the future, it will be easy to replace or repair.

[0076] In addition to multiple cipher wheels 40, the cipher wheel assembly 4 in this embodiment mainly includes a mounting base 41, a locking plate 42, a wheel axle 43, and multiple coupling wheels 44. The mounting base 41 serves as the overall support structure for the cipher wheel assembly 4, providing installation space for other components in the cipher wheel assembly 4 and ensuring the overall structural strength.

[0077] A wheel axle 43 is mounted on a mounting base 41. Multiple coupling wheels 44 are rotatably mounted on the wheel axle 43. The wheel axle 43 is the rotation center of the multiple coupling wheels 44. In this embodiment, the multiple password wheels 40 correspond one-to-one with the multiple coupling wheels 44. That is, in the figure, there are three password wheels 40 and three coupling wheels 44. The password wheels 40 are mounted on the coupling wheels 44, and the password wheels 40 and the coupling wheels 44 are detachably snap-fitted together. The lock plate 42 is movably mounted on the mounting base 41 and has a locking part 420. The multiple coupling wheels 44 can drive the lock plate 42. The lock base 1 has multiple lock grooves 102 along its circumference.

[0078] In actual use, when multiple combination wheels 40 are turned to the correct combination, the locking part 420 disengages from the lock groove 102, releasing the handle 3 from locking. Specifically, the combination wheels 40 can drive the lock plate 42 via the coupling wheel 44, causing the locking part 420 to lock into the lock groove 102, thus locking the handle 3. That is, when the combination wheels 40 are turned so that one of them is no longer in the correct combination, the corresponding coupling wheel 44 will drive the lock plate 42 towards the lock groove 102, thereby locking the locking part 420 into the lock groove 102. An interference fit is formed between the lock plate 42 and the lock seat 1, ensuring that the handle 3 cannot rotate and locking the handle 3 onto the lock seat 1.

[0079] Preferably, in this embodiment, the opening positions of the shift slots on the lock seat 1 correspond one-to-one with the opening positions of the lock grooves 102, that is, the four shift slots correspond to the four lock grooves 102, and are evenly distributed along the circumference of the mounting platform 10 on the lock seat 1. When the locking part 420 is rotated with the handle 3 to align with the lock groove 102, the shift ball engages with the shift slot.

[0080] Each coupling wheel 44 has a notch 440, which creates a plane on the coupling wheel 44. Specifically, the coupling wheel 44 has an arcuate segment and a flat segment in its circumference, with the flat segment corresponding to the notch 440. Near both ends of the lower side of the locking plate 42, a tension spring 47 is provided. One end of the tension spring 47 abuts against the locking plate 42, and the other end abuts against the mounting base 41, and is in a compressed state. The tension spring 47 acts on the locking plate 42, causing it to always have a tendency to move away from the locking base 1. When the arc-shaped section of the coupling wheel 44 abuts against the locking plate 42, the locking plate 42 moves towards the lock seat 1 under the action of the arc-shaped section, overcoming the force of the tension spring 47, so that the locking part 420 is locked into the lock groove 102; when the flat section of the coupling wheel 44 abuts against the locking plate 42, the action of the arc-shaped section on the locking plate 42 is released, and the locking plate 42 can move away from the lock seat 1 under the action of the tension spring 47, so that the locking part 420 is disengaged from the lock groove 102.

[0081] When the correct password is entered by turning the combination wheel 40, the flat section of the combination wheel 40 corresponding to the coupling wheel 44 is aligned with the lock plate 42. If the number on the current combination wheel 40 is an incorrect password, the arc section of the combination wheel 40 corresponding to the coupling wheel 44 is aligned with the lock plate 42.

[0082] In other words, as long as the notches 440 on all the coupling wheels 44 are aligned with the lock plate 42 (at which time the combination wheel 40 is the correct combination), the tension spring 47 can drive the lock plate 42 to move away from the lock seat 1, so that the locking part 420 of the lock plate 42 disengages from the lock groove 102, and the lock plate 42 releases the rotation limit of the handle 3, that is, releases the rotation limit of the combination wheel assembly 4 on the handle 3.

[0083] The mechanical combination lock in this embodiment is also equipped with a password change function. When the user wants to change the password, the mechanical combination lock can perform a password change operation. Specifically, a password change hole 302 is provided on one side of the handle 3. One end of the axle 43 is located near the password change hole 302. When changing the password, a hard object such as iron wire or steel wire is inserted into the password change hole 302 to push the axle 43. The password wheel 40 and the coupling wheel 44 are detachably snapped together. A return spring 46 is sleeved on the axle 43. The return spring 46 is located at the end away from the password change hole 302, and one end of the return spring 46 abuts against the mounting base 41, while the other end of the return spring 46 abuts against the coupling wheel 44 nearby.

[0084] In actual use, the combination can only be changed when all the combination wheels 40 are in the correct combination position. If even one combination wheel 40 is not in the correct combination position, the combination cannot be changed. This is because if even one combination wheel 40 is not in the correct combination position, the locking part 420 is locked in the lock groove 102, and the coupling wheel 44 cannot be driven by the abutment shaft 43. When all the combination wheels 40 are turned to the correct combination, the lock plate 42 moves upward, causing the locking part 420 to disengage from the lock groove 102. At this time, a pointed object is inserted into the combination change hole 302 to push the wheel shaft 43. The wheel shaft 43 drives all the coupling wheels 44 to move closer to the return spring 46. All the coupling wheels 44 disengage from the combination wheels 40, and the return spring 46 is compressed. At this time, the combination wheels 40 can be rotated to change the combination. After the combination is changed, under the elastic force of the return spring 46, all the coupling wheels 44 re-engage and fix with their corresponding combination wheels 40.

[0085] To ensure a good tactile feedback when the user turns the combination wheel 40, the combination wheel assembly 4 also includes a spring plate 45. The spring plate 45 has elastic arms that correspond one-to-one with the multiple combination wheels 40. In this figure, the three elastic arms move against the three combination wheels 40 respectively. Each character of the combination wheel 40 has a slot. When the combination wheel 40 is turned, the elastic arm engages with the slot, providing a clear engagement feel and ensuring a good tactile feedback when the user turns the combination, which can effectively improve the user experience.

[0086] The unlocking and locking principle of the mechanical combination lock in this embodiment is as follows:

[0087] When unlocking is required, the user holds the handle 3 with one hand, with four fingers resting on the grip 32 and the thumb naturally extending towards the ramp 300. The thumb allows the user to sequentially move the multiple combination wheels 40 to the correct combination. All coupling wheels 44 align with the lock plate 42 through the notch 440 (i.e., the flat section abuts against the lock plate 42). The lock plate 42 moves upward under the action of two tension springs 47, causing the locking part 420 on the lock plate 42 to disengage from the lock groove 102, releasing the restriction on the handle 3. At this point, the other four fingers can rotate the handle 3 to unlock. The rotation of the handle 3 drives the lock cylinder module 2 to rotate, thus disengaging the bolt 24 from the door frame. During this process, the combination switching action and the rotation of the handle 3 occur continuously without interruption.

[0088] When locking is required, the user turns the handle 3 to restore the interference between the bolt 24 and the door frame. By scrambling the password of at least one combination wheel 40, the password is no longer in the correct password position. This causes the arc-shaped section on the coupling wheel 44 to push against the lock plate 42. The lock plate 42 moves towards the lock seat 1, causing the locking part 420 on the lock plate 42 to lock into the lock groove 102, restricting the rotational freedom of the handle 3, thus locking the handle 3 and completing the locking process. At this time, the handle 3 cannot be turned to unlock.

[0089] The principle of changing the combination lock in this embodiment is as follows:

[0090] When all the combination wheels 40 are in the correct combination position, the combination can be changed. If any one of the combination wheels 40 is not in the correct combination position, the combination cannot be changed. This is because if even one combination wheel 40 is not in the correct combination position, the locking part 420 of the lock plate is locked into the lock groove 102, preventing the coupling wheel 44 from being driven by the abutment shaft 43. When all the combination wheels 40 are turned to the correct combination, the lock plate 42 moves upward, causing the locking part 420 to disengage from the lock groove 102. At this time, a pointed object is inserted into the combination change hole 302 to push the wheel shaft 43. The wheel shaft 43 drives all the coupling wheels 44 to move closer to the return spring 46. All the coupling wheels 44 disengage from the combination wheels 40, and the return spring 46 is compressed. At this time, the combination wheels 40 can be rotated to change the combination. After the change is completed, under the elastic force of the return spring 46, all the coupling wheels 44 re-engage with their corresponding combination wheels 40, and the combination change is completed.

[0091] In this design, when the user holds the handle 3 for one-handed unlocking, the user's thumb naturally extends towards the ramp 300, and the thumb's swing range on the ramp 300 can reach all the combination wheels. This allows the combination switching action and the handle 3 rotation action to be completed continuously while holding the lock with one hand. During this process, the unlocking action is smooth, the user's hand movement is minimal, and no arm assistance is required. Operation is simple, unlocking efficiency is high, the spatial layout is reasonable, and the structure is compact, effectively solving the problems of cumbersome operation and poor continuity in traditional mechanical combination locks. Furthermore, this layout makes good use of ergonomics, effectively improving user comfort and usability. The thumb can easily reach and rotate all the combination wheels 40 while maintaining the grip posture, without the need for movement of the other four fingers or wrist and arm assistance, improving operational convenience and efficiency. When the user holds the handle 3 to unlock, the thumb extends towards the ramp 300, the other four fingers rest on the inner curved surface 321, and the palm can rest on the outer curved surface 322. This ergonomic design effectively improves the user's grip. One end of the grip 32 is connected to the adapter 31, and the other end gradually moves away from the rotation center of the handle 3, making the lever arm longer and the operation more effortless when the user turns the handle 3.

[0092] This mechanical combination lock utilizes ergonomics to enhance user comfort and usability. It is easy to operate and unlock, and its overall structure is compact and small in size.

Claims

1. A mechanical combination lock, characterized in that, include: Lock seat; A lock cylinder module is rotatably mounted on the lock base, and a handle is provided on the lock base. By rotating the handle, the lock cylinder module is driven to rotate relative to the lock base, thereby unlocking or locking the mechanical combination lock. A combination wheel assembly is disposed between the lock base and the handle, and can lock the handle to the lock base; the combination wheel assembly includes multiple combination wheels, the handle has a ramp portion, and the multiple combination wheels protrude from the ramp portion; by turning the multiple combination wheels to the correct combination, the locking of the combination wheel assembly to the handle is released; When a user holds the handle to unlock the lock: their thumb naturally extends towards the ramp, and the range of the thumb's swing on the ramp can reach multiple of the combination wheels, so that the combination switching action and the handle rotation action can be completed continuously in a single-handed holding state.

2. The mechanical combination lock according to claim 1, characterized in that, The handle includes an adapter and a grip. The adapter is rotatably mounted on the lock seat. The ramp is located on the adapter. One end of the grip is connected to the adapter, and the other end gradually moves away from the rotation center of the handle, so as to lengthen the lever arm when the user turns the handle.

3. The mechanical combination lock according to claim 2, characterized in that, The plurality of the password wheels are arranged side by side and coaxially at the ramp, and their axial direction is perpendicular to the grip portion; When a user holds the handle with one hand to unlock, the range of motion of their thumb on the ramp can encompass all the combination wheels.

4. The mechanical combination lock according to claim 2, characterized in that, The gripping part is configured in a flat shape, having an inner arc surface and an outer arc surface that are arranged opposite to each other, the inner arc surface being convex inward and the outer arc surface being convex outward; When a user holds the handle to unlock the door: their thumb extends toward the ramp, the other four fingers rest on the inner arc surface, and their palm can rest against the outer arc surface.

5. The mechanical combination lock according to claim 2, characterized in that, The cross-sectional area of ​​the grip gradually decreases from the end closer to the adapter to the end farther away from the adapter.

6. The mechanical combination lock according to claim 1, characterized in that, The inclination angle of the slope is between 35 degrees and 37 degrees.

7. The mechanical combination lock according to claim 1, characterized in that, One end of the handle has a mounting cavity, and the ramp portion is provided with multiple through holes communicating with the mounting cavity; The cipher wheel assembly is disposed in the mounting cavity, with multiple cipher wheels respectively located in the multiple through holes, and the cipher wheel portions protruding from the through holes.

8. The mechanical combination lock according to claim 1, characterized in that, The lock cylinder module includes a lock cylinder, and one end of the lock cylinder has a mounting plate, which is detachably and fixedly connected to the handle. One end of the lock base has a mounting platform, the lock cylinder passes through the lock base, and the mounting plate is rotatably mounted on the mounting platform; The mounting platform has multiple shift holes along its circumference on the side near the mounting plate. The mounting plate has a shift ball, which can partially protrude towards the mounting platform and be engaged in the shift holes. A spring is provided between the shift ball and the handle, with one end of the spring abutting against the shift ball and the other end abutting against the handle. When the handle is rotated to unlock or lock, the shift ball can be moved to switch between the multiple shift holes.

9. The mechanical combination lock according to claim 8, characterized in that, The combination wheel assembly is detachably disposed between the handle and the mounting plate. When the lock cylinder is removed from the handle, the combination wheel assembly can be removed entirely from the handle. The combination wheel assembly also includes a mounting base, a locking plate, a wheel axle, and multiple coupling wheels. The wheel axle is disposed on the mounting base, and the multiple coupling wheels are rotatably mounted on the wheel axle in sequence. The multiple combination wheels correspond one-to-one with the multiple coupling wheels, and the combination wheels are mounted on the coupling wheels. The locking plate is movably disposed on the mounting base, and the locking plate has a locking part. The multiple coupling wheels can drive the locking plate. The lock base has multiple lock slots along its circumference. When the multiple combination wheels are turned to the correct combination, the locking part disengages from the lock slot, releasing the handle from locking. The combination wheels can drive the lock plate through the coupling wheel, causing the locking part to lock into the lock slot and lock the handle.

10. The mechanical combination lock according to claim 8, characterized in that, The lock cylinder module also includes a bolt, which is fixedly connected to the end of the lock cylinder away from the mounting plate.

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