A password wheel structure of a bicycle lock
By using modular combination wheel components and a detachable external fixing plate design, the complexity of using and maintenance of traditional bicycle lock combination wheel structures is solved, achieving efficient code adjustment and enhanced security.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU DALISHI SILICONE LOCK CO LTD
- Filing Date
- 2026-05-11
- Publication Date
- 2026-06-12
AI Technical Summary
Traditional bicycle lock combination wheel structures suffer from problems such as complex coding adjustments, parts jamming, low production pass rates, high repair difficulty, and high maintenance costs during use.
A detachable code wheel assembly and an external fixing plate structure were designed. The code wheel assembly can be installed and removed independently and is fixed to the slot by a snap ring, which simplifies the coding adjustment and maintenance process.
It improved the production qualification rate, reduced maintenance difficulty and cost, enhanced anti-theft security performance, and ensured the intuitiveness and accuracy of coding adjustment.
Smart Images
Figure CN224351758U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bicycle lock technology, and in particular to a combination wheel structure for a bicycle lock. Background Technology
[0002] Bicycle locks, especially those using combination wheel mechanisms, are widely used due to their convenience in eliminating the need for mechanical keys. A traditional bicycle lock combination wheel structure typically includes a combination lever, multiple combination wheels, and combination teeth. Its working principle involves rotating the combination wheels, which drives an internal coding device (such as a coding cam or slider) to move, selectively allowing or blocking the movement of the combination teeth, thus achieving locking and unlocking.
[0003] Existing combination wheel structures, especially locks that use a rotating coding cover to drive the coding device for setting and changing the combination, have several shortcomings in long-term use and manufacturing. First, their coding adjustment structure is often complex, with interconnected internal parts. Users cannot visually inspect the coding structure when adjusting the combination, leading to issues such as improper adjustment, jamming of internal parts, or failure to return to the correct position, affecting smoothness and reliability. Second, in mass production, the need for precise alignment of multiple combination wheels and their associated coding components results in cumulative dimensional tolerances, easily causing coding errors, inaccurate alignment, or even complete lock failure. This significantly reduces the product yield and increases manufacturing costs. Furthermore, if the coding device malfunctions, the combination wheel assembly is usually permanently encapsulated on the combination bar, making disassembly difficult and extremely challenging for repair or resetting the combination. Often, the entire lock needs to be replaced, resulting in high maintenance costs. Utility Model Content
[0004] This utility model proposes a combination wheel structure for a bicycle lock, wherein each combination wheel component can be detached and the combination can be adjusted individually, thus solving the aforementioned problems existing in the prior art.
[0005] The technical solution of this utility model is implemented as follows: A combination wheel structure for a bicycle lock includes a combination bar, a combination wheel assembly, and combination teeth. The combination bar includes a first locking ring connecting post, a combination bar cover, and a combination bar sleeve post. The first locking ring connecting post and the combination bar sleeve post are integrally formed on both sides of the combination bar cover. The combination teeth include a second locking ring connecting post, a combination tooth cover, and combination tooth rods. The second locking ring connecting post and the combination tooth rods are integrally formed on both sides of the combination tooth cover. The combination tooth rods have multiple locking teeth spaced apart along their length. The combination bar sleeve post has a socket for inserting the combination tooth rods. The combination bar sleeve post has an axially formed notch for the locking teeth to pass through the side wall of the combination bar sleeve post. Several combination wheel assemblies are provided and sequentially sleeved on the outside of the combination bar sleeve post. An outer fixing plate is detachably connected to the end of the combination bar sleeve post away from the combination bar cover. The combination wheel assembly is confined between the combination bar cover and the outer fixing plate. The outer fixing plate is located inside the combination tooth cover when the combination tooth rods are fully inserted into the socket.
[0006] Preferably, the outer fixing plate is sleeved on the cipher rod sleeve, and the cipher rod sleeve has a slot located on the upper side of the outer fixing plate, and a retaining spring is engaged in the slot to form abutment against the outer fixing plate.
[0007] Preferably, the outer fixing plate has a retaining spring receiving groove on the side away from the password wheel assembly, and the retaining spring is located in the retaining spring receiving groove when it is inserted into the retaining spring receiving groove.
[0008] Preferably, the combination wheel assembly includes a combination wheel, a washer, a tactile plate, and a combination wheel enclosure cover. A retaining ring cover is fixedly connected to one end of the combination wheel. The inner side of the retaining ring cover has a plurality of ring cover limiting teeth integrally formed. The washer is located inside the combination wheel and abuts against the retaining ring cover. The washer has a plurality of coded limiting teeth integrally formed on it that mesh with the ring cover limiting teeth. The washer has an unlocking opening for the locking teeth to pass through. The tactile plate is located inside the combination wheel and abuts against the side of the washer away from the retaining ring cover. The outer side of the tactile plate... The device has several elastic arms integrally formed, and each elastic arm has a positioning protrusion integrally formed. The inner sidewall of the cipher wheel is provided with several positioning grooves spaced circumferentially. The positioning protrusions are used to engage in the positioning grooves. The tactile plate is axially slidably fitted on the cipher rod sleeve and cannot rotate circumferentially relative to the cipher rod sleeve. The cipher wheel encapsulation cover is fixedly installed on the end of the cipher wheel away from the cipher wheel. A return spring is provided between the cipher wheel encapsulation cover and the tactile plate. The cipher wheel, the gasket, and the cipher wheel encapsulation cover are rotatably fitted on the cipher rod sleeve.
[0009] Preferably, the lower end of the tactile sheet is integrally formed with a lower protruding ring, and the password wheel encapsulation cover has a lower through-hole for the lower protruding ring to pass through.
[0010] Preferably, the cipher wheel cover is provided with an inner fixing plate, and four cipher wheel assemblies are arranged in sequence, wherein the lower convex ring of the cipher wheel assembly adjacent to the inner fixing plate is limited by the inner fixing plate, and the lower convex ring of the other cipher wheel assemblies is limited by the gasket of the cipher wheel assembly on the adjacent side.
[0011] Preferably, the password rod sleeve has a plurality of anti-rotation teeth integrally formed on it, and the tactile plate has an anti-rotation opening for engaging with the anti-rotation teeth.
[0012] Preferably, the combination wheel has a limiting ring integrally formed on the supporting ring cover, and the combination wheel encapsulation cover has an inner groove for the limiting ring to rotate and engage. The lower end of the outer fixing plate is rotatably engaged in the limiting ring of the adjacent combination wheel.
[0013] In summary, the beneficial effects of this utility model are as follows:
[0014] 1. By sequentially mounting the combination wheel assemblies onto the outside of the combination bar sleeve and using a detachable external fixing plate to confine them between the combination bar cover and the external fixing plate, modular and independent installation of the combination wheel assemblies is achieved. In the unlocked state, users can easily remove the external fixing plate, allowing individual or multiple combination wheel assemblies to be easily removed from the combination bar sleeve for independent coding adjustment, inspection, or replacement. This completely eliminates the design of multiple coding components interconnected and unable to be handled individually in traditional structures, fundamentally avoiding the problem of scrambled codes caused by accumulated part tolerances, and significantly improving the pass rate of mass production. Simultaneously, in the locked state, the external fixing plate is precisely retracted into the combination tooth cover, utilizing the structure of the combination teeth themselves to provide physical protection for the external fixing plate, preventing it from being maliciously disassembled from the outside, and significantly improving the anti-theft security performance of the lock.
[0015] 2. The external fixing plate is detachably fixed through the cooperation of the retaining spring and the retaining groove. The structure is simple and the manufacturing cost is low. Users or maintenance personnel can easily remove the retaining spring without special tools, and then disassemble and assemble the external fixing plate and the combination wheel assembly. This greatly facilitates later maintenance, combination reset and parts replacement, and reduces maintenance difficulty and cost.
[0016] 3. When adjusting the combination, the shim can be pushed axially with a special tool to disengage it from the limiting teeth on the combination wheel. At this point, rotating the combination wheel will independently set the combination without rotating the shim. This "push-rotate-release" method is intuitive and precise, effectively avoiding the jamming and misalignment problems associated with traditional rotary adjustments. During normal use, the return spring ensures a tight engagement between the shim and the limiting teeth on the combination wheel. The cooperation between the positioning protrusion and the positioning groove provides a clear sense of rotation and positioning, ensuring the accuracy and stability of the combination lock and providing a better operating feel. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0020] Figure 3 This is a schematic diagram of the structure of the code teeth in this utility model;
[0021] Figure 4 This is a schematic diagram of the structure of this utility model after removing the code teeth;
[0022] Figure 5 This is a schematic diagram of the structure of this utility model after removing the code teeth and the retaining spring;
[0023] Figure 6 This is a schematic diagram of the structure of the present invention after removing the key teeth, snap ring, and outer fixing plate;
[0024] Figure 7 This is a schematic diagram of the cipher rod part in this utility model;
[0025] Figure 8 This is a schematic diagram of the structure of the cipher rod and cipher teeth in this utility model.
[0026] Figure 9 This is an exploded view of the structure of the password wheel assembly in this utility model;
[0027] Figure 10 This is a schematic diagram of the structure in this utility model where the gasket and the tactile plate are installed on the PIN bar;
[0028] Figure 11 This is a schematic diagram of the password wheel assembly in this utility model;
[0029] Figure 12 for Figure 11 A schematic diagram of the structure when observed from another angle;
[0030] Figure 13 This is a schematic diagram of the cipher wheel assembly without the cipher wheel encapsulation cover in this utility model;
[0031] Figure 14 This is a schematic diagram of the structure of a dedicated encoder for coding.
[0032] Figure 15 This is a schematic diagram of the structure of this utility model after the steel wire locking ring is assembled.
[0033] In the diagram: 1. Combination bar; 11. First lock ring connecting post; 12. Combination bar cover; 13. Combination bar sleeve post; 131. Insert; 132. Lock tooth notch; 133. Slot; 134. Anti-rotation tooth; 2. Combination tooth; 21. Second lock ring connecting post; 22. Combination tooth cover; 23. Combination tooth bar; 231. Lock tooth; 4. Combination wheel assembly; 41. Combination wheel; 411. Support ring cover; 412. Ring cover limiting tooth; 413. Positioning groove; 414. Limiting ring; 42. Washer; 421. Encoding limiting tooth; 422. Unlocking opening; 43. Tactile piece; 431. Elastic arm; 432. Positioning protrusion; 433. Lower protruding ring; 434. Anti-rotation opening; 44. Password wheel enclosure cover; 441. Lower opening; 442. Inner groove of the cover body; 5. Return spring; 6. Outer fixing plate; 61. Snap ring receiving groove; 7. Snap ring; 8. Inner fixing plate; 100. Wire locking ring; 200. Encoder; 201. Positioning post; 202. Pressing platform; 203. Handle. Detailed Implementation
[0034] The following will refer to the appendix in the embodiments of this utility model. Figure 1-15 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0035] Example:
[0036] like Figures 1 to 13 As shown, this utility model discloses a combination wheel structure for a bicycle lock, as follows: Figure 15 The structure shown is suitable for use with a flexible steel wire locking ring with an external rubber layer to form a complete bicycle lock.
[0037] Specifically, the cipher wheel structure includes a cipher rod 1, a cipher wheel assembly 4, and cipher teeth 2. The cipher rod 1 is composed of a first locking ring connecting post 11, a cipher rod cover 12, and a cipher rod sleeve post 13. The first locking ring connecting post 11 and the cipher rod sleeve post 13 are integrally formed on both sides of the cipher rod cover 12. The first locking ring connecting post 11 is used to fix one end of the wire locking ring 100. An inner fixing plate 8 is provided inside the cipher rod cover 12. The cipher rod sleeve post 13 is a hollow cylinder with an axially oriented insertion port 131 for inserting the cipher teeth 23 of the cipher teeth 2. An axially oriented elongated cipher tooth notch 132 is formed on the side wall of the cipher rod sleeve post 13, communicating with the insertion port 131 for the cipher teeth 231 on the cipher teeth 23 to pass through.
[0038] The combination gear 2 includes a second locking ring connecting post 21, a combination gear cover 22, and a combination gear rod 23. The second locking ring connecting post 21 and the combination gear rod 23 are integrally formed on both sides of the combination gear cover 22, and the second locking ring connecting post 21 is used to fix and connect the other end of the wire locking ring 100. The combination gear rod 23 is round and has multiple locking teeth 231 spaced apart along its length, the number of locking teeth 231 matching the number of combination wheel assemblies 4. The combination gear cover 22 is a cover-shaped component with an inner cavity. When the combination gear rod 23 is fully inserted into the insertion port 131 of the combination rod sleeve post 13, the combination gear cover 22 can cover the outer fixing plate 6 and the end of the combination rod sleeve post 13.
[0039] The cipher wheel assembly 4 is provided in several parts, preferably four in this embodiment, which are sequentially sleeved on the outside of the cipher rod sleeve 13. The cipher rod sleeve 13 has an outer fixing plate 6 detachably connected to the end away from the cipher rod cover 12. The cipher wheel assembly 4 is confined between the cipher rod cover 12 and the outer fixing plate 6. When the cipher rod 23 is fully inserted into the insertion port 131, the outer fixing plate 6 is located inside the cipher rod cover 22.
[0040] To secure the outer fixed plate 6, a slot 133 is provided at the end of the combination bar sleeve 13, and a retaining spring 7 is secured within the slot 133. The retaining spring 7 abuts against the outside of the outer fixed plate 6 to prevent it from coming off. To further improve the compactness and anti-theft properties of the structure, a retaining spring receiving groove 61 is provided on the side of the outer fixed plate 6 away from the combination wheel assembly 4. When the retaining spring 7 is engaged in the slot 133, it is precisely positioned within the retaining spring receiving groove 61. When the combination bar 23 is fully inserted into the socket 131 (i.e., in the locked state), the outer fixed plate 6, together with the retaining spring 7, is located inside the combination bar cover 22, protected by the cover and cannot be touched or disassembled from the outside.
[0041] The specific structure of each code wheel assembly 4 is as follows: it includes a code wheel 41, a washer 42, a tactile plate 43, a return spring 5, and a code wheel enclosure cover 44. Numbers or markings may be engraved on the outer circumference of the code wheel 41. One end of the wheel has an integrally formed abutment ring cover 411, and the inner side of the abutment ring cover 411 has multiple ring cover limiting teeth 412 integrally formed along the circumferential direction. The washer 42 is located inside the code wheel 41, and one end of it abuts against the abutment ring cover 411. Several coded limiting teeth 421 are integrally formed on the washer 42 at positions corresponding to the ring cover limiting teeth 412. Under normal use, the coded limiting teeth 421 mesh with the ring cover limiting teeth 412, so that the rotation of the code wheel 41 drives the washer 42 to rotate synchronously. An unlocking opening 422 is provided on the pad 42. The size and position of the unlocking opening 422 correspond to the locking teeth 231 on the combination bar 23. When the combination bar 23 is inserted into the socket 131, the locking teeth 231 can pass through the unlocking opening 422. The tactile plate 43 is located inside the combination wheel 41 and abuts against the side of the pad 42 away from the abutment ring cover 411. Two elastic arms 431 are integrally formed on the outer side of the tactile plate 43, and a positioning protrusion 432 is integrally formed on each elastic arm 431. Correspondingly, multiple positioning grooves 413 are spaced apart circumferentially on the inner sidewall of the combination wheel 41. The positioning protrusions 432 can engage in the positioning grooves 413 to provide a clear rotational feel and positioning function. A lower protruding ring 433 is integrally formed at the lower end of the tactile plate 43. The code wheel enclosure cover 44 is glued to the end of the code wheel 41 away from the abutment ring cover 411. The code wheel enclosure cover 44 has a downward through-hole 441 through which the lower protruding ring 433 of the tactile plate 43 can pass, providing movement space during encoding. A return spring 5 is provided between the code wheel enclosure cover 44 and the tactile plate 43. This return spring 5 constantly pushes the tactile plate 43 towards the abutment ring cover 411, thereby pushing the washer 42 and keeping the encoding limiting tooth 421 engaged with the ring cover limiting tooth 412. The code wheel 41, washer 42, and code wheel enclosure cover 44 are all rotatably fitted onto the code lever sleeve 13.
[0042] To ensure that the tactile sensor 43 can only slide axially and not rotate circumferentially, several anti-rotation teeth 134 extending axially are integrally formed on the outer wall of the cipher lever sleeve 13. Simultaneously, an anti-rotation opening 434 that mates with the anti-rotation teeth 134 is provided on the inner wall of the tactile sensor 43. Thus, when the tactile sensor 43 is fitted onto the cipher lever sleeve 13, the anti-rotation opening 434 engages with the anti-rotation teeth 134, preventing the tactile sensor 43 from rotating relative to the cipher lever sleeve 13 and allowing it to move only axially.
[0043] The lower protruding ring 433 of the first cipher wheel assembly 4 closest to the cipher wheel cover 12 is positioned against the inner fixing plate 8 inside the cipher wheel cover 12 (i.e., movement in that direction will create contact), thus achieving axial positioning. The lower protruding rings 433 of the remaining cipher wheel assemblies 4 are positioned against the gaskets 42 of the cipher wheel assemblies 4 on their adjacent side (i.e., the side closer to the cipher wheel cover 12). Through this method of sequential positioning, multiple cipher wheel assemblies 4 are compactly and orderly installed on the cipher wheel sleeve 13.
[0044] The combination wheel 41 has a limiting ring 414 integrally formed on the outer end face of the abutment ring cover 411. The combination wheel encapsulation cover 44 has an inner groove 442 for the limiting ring 414 to rotate and engage. The lower end of the outer fixing plate 6 is rotatably engaged within the limiting ring 414 of the adjacent combination wheel 41. This structure provides stable support and guidance for the installation of the combination wheel assembly 4.
[0045] The assembly and operation process of this embodiment is as follows:
[0046] During assembly, the tactile sensor 43, return spring 5, washer 42, combination wheel 41, and combination wheel enclosure cover 44 are first assembled into an independent combination wheel assembly 4. Then, multiple combination wheel assemblies 4 are inserted one by one from the end of the combination rod sleeve 13, so that the anti-rotation opening 434 of the tactile sensor 43 engages with the anti-rotation tooth 134 of the combination rod sleeve 13, and the limiting rings 414 of each combination wheel assembly 4 are sequentially abutted and limited within the groove of the cover body in the manner described above. Next, the outer fixing plate 6 is fitted onto the end of the combination rod sleeve 13, and the retaining spring 7 is inserted into the retaining groove 133, causing the retaining spring 7 to fall into the retaining spring 7 receiving groove 61, thereby completing the installation of the combination wheel assembly 4 on the combination rod 1.
[0047] In use, the user rotates the combination wheel 41 to align the numbers on each combination wheel assembly 4 with the preset combination. If the combination is correct, the unlocking opening 422 on each washer 42 will align with the corresponding locking tooth 231 on the combination lever 23. At this time, the user can pull the combination lever 2, causing the combination lever 23 to be pulled out of the insertion port 131 of the combination lever sleeve 13, while the locking tooth 231 passes through the unlocking opening 422, thus unlocking. Conversely, when the combination wheel 41 is rotated to any non-combination position, the washer 42 rotates accordingly, the unlocking opening 422 and the locking tooth 231 are misaligned, the locking tooth 231 is blocked by the solid part of the washer 42, and the combination lever 23 cannot be pulled out, thus locking.
[0048] This implementation provides a convenient and intuitive method for users to change their passwords. First, keep the lock in the unlocked state (i.e., the combination lock 23 is pulled out, and the lock teeth 231 are not inserted into the unlocking opening 422). Then, use a tool (such as your fingers or a screwdriver) to pry open the retaining spring 7 and remove the outer fixing plate 6 from the combination lock sleeve 13. At this point, all combination wheel assemblies 4 are no longer axially constrained, and the user can remove one or more combination wheel assemblies 4 that need adjustment from the combination lock sleeve 13 one by one. After removing the combination wheel assemblies 4, use a specially designed encoder 200 to adjust the code. This dedicated encoder 200 is as follows... Figure 14 The device shown has a positioning post 201 and a holding platform 202. The positioning post 201 is integrally formed on the holding platform 202 and its size is adapted to the unlocking opening 422 of the pad 42. The holding platform 202 is provided with a handle 203. The positioning post 201 is inserted into the unlocking opening 422 of the pad 42, while the holding platform 202 presses against the end face of the pad 42. A forceful push causes the pad 42 to overcome the elastic force of the return spring 5 and move towards the code wheel enclosure cover 44, thereby completely disengaging the encoding limiting tooth 421 from the ring cover limiting tooth 412. At this time, while maintaining the pushing state, the pad 42 is rotated. The user only needs to align the desired number on the code wheel 41 with the unlocking opening 422 to complete the setting of the new code for that code wheel, which is very intuitive. Releasing the encoder 200 causes the pad 42 to reset under the action of the return spring 5, and its encoding limiting tooth 421 re-engages with the ring cover limiting tooth 412 in the new position. Repeating the above steps allows for independent adjustment of other code wheel assemblies 4. After all the cipher wheel assemblies 4 have been adjusted, they are put back onto the cipher wheel sleeves 13 in their original order, and the outer fixing plate 6 and snap ring 7 are installed, thus completing the entire cipher reset process. Since the encoding adjustments of each cipher wheel assembly 4 do not interfere with each other, there is no problem of tolerance accumulation between multiple encoding components in traditional structures, effectively avoiding the garbled code phenomenon common in mass production, and significantly reducing the difficulty of maintenance and repair.
[0049] In summary, the combination wheel structure of the bicycle lock provided in this embodiment, through the modular combination wheel assembly 4 and the quick-detachable outer fixing plate 6 design, realizes independent adjustment of the code and convenient replacement of parts. In the locked state, it can also ensure that the outer fixing plate 6 is effectively protected by the combination tooth cover 22, thus combining operational flexibility, high production yield, and excellent anti-theft performance.
[0050] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.
[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A combination wheel structure for a bicycle lock, characterized in that: The device includes a combination bar, a combination wheel assembly, and combination teeth. The combination bar includes a first locking ring connecting post, a combination bar cover, and a combination bar sleeve post. The first locking ring connecting post and the combination bar sleeve post are integrally formed on both sides of the combination bar cover. The combination teeth include a second locking ring connecting post, a combination tooth cover, and combination tooth rods. The second locking ring connecting post and the combination tooth rods are integrally formed on both sides of the combination tooth cover. The combination tooth rods have multiple locking teeth spaced apart along their length. The combination bar sleeve post has a socket for inserting the combination tooth rods. The combination bar sleeve post has an axially formed notch for the locking teeth to pass through the side wall of the combination bar sleeve post. The combination wheel assembly has several wheels and is sequentially sleeved on the outside of the combination bar sleeve post. An outer fixing plate is detachably connected to the end of the combination bar sleeve post away from the combination bar cover. The combination wheel assembly is confined between the combination bar cover and the outer fixing plate. The outer fixing plate is located inside the combination tooth cover post when the combination tooth rods are fully inserted into the socket.
2. The combination wheel structure of a bicycle lock according to claim 1, characterized in that: The outer fixing plate is sleeved on the cipher rod sleeve. The cipher rod sleeve has a slot located on the upper side of the outer fixing plate. A retaining spring is engaged in the slot to form a contact with the outer fixing plate.
3. The combination wheel structure of a bicycle lock according to claim 2, characterized in that: The outer fixing plate has a retaining spring receiving groove on the side away from the password wheel assembly, and the retaining spring is located in the retaining spring receiving groove when it is inserted into the retaining spring receiving groove.
4. The combination wheel structure of a bicycle lock according to claim 1, characterized in that: The combination wheel assembly includes a combination wheel, a washer, a tactile plate, and a combination wheel enclosure cover. A retaining ring cover is fixedly connected to one end of the combination wheel. The inner side of the retaining ring cover has several ring cover limiting teeth integrally formed. The washer is located inside the combination wheel and abuts against the retaining ring cover. The washer has several coded limiting teeth integrally formed on it that mesh with the ring cover limiting teeth. The washer has an unlocking opening for the locking teeth to pass through. The tactile plate is located inside the combination wheel and abuts against the side of the washer away from the retaining ring cover. The outer side of the tactile plate is integrally formed with… The device has several elastic arms, each with an integrally formed positioning protrusion. The inner wall of the cipher wheel has several circumferentially spaced positioning grooves, and the positioning protrusions are used to engage in the positioning grooves. The tactile plate is axially slidably fitted onto the cipher rod sleeve and cannot rotate circumferentially relative to the cipher rod sleeve. The cipher wheel encapsulation cover is fixedly installed on the end of the cipher wheel away from the cipher wheel. A return spring is provided between the cipher wheel encapsulation cover and the tactile plate. The cipher wheel, the gasket, and the cipher wheel encapsulation cover are rotatably fitted onto the cipher rod sleeve.
5. The combination wheel structure of a bicycle lock according to claim 4, characterized in that: The lower end of the tactile plate is integrally formed with a lower protruding ring, and the password wheel encapsulation cover has a lower through-hole for the lower protruding ring to pass through.
6. The combination wheel structure of a bicycle lock according to claim 4, characterized in that: The cipher wheel cover is provided with an inner fixing plate, and four cipher wheel assemblies are arranged in sequence. The lower convex ring of the cipher wheel assembly adjacent to the inner fixing plate is limited by the inner fixing plate, and the lower convex ring of the other cipher wheel assemblies is limited by the gasket of the cipher wheel assembly on the adjacent side.
7. The combination wheel structure of a bicycle lock according to claim 4, characterized in that: The password rod sleeve has several anti-rotation teeth integrally formed on it, and the tactile plate has an anti-rotation opening for engaging with the anti-rotation teeth.
8. The combination wheel structure of a bicycle lock according to claim 4, characterized in that: The password wheel has a limiting ring integrally formed on the supporting ring cover. The password wheel encapsulation cover has a groove inside the cover for the limiting ring to rotate and engage. The lower end of the outer fixing plate is rotatably engaged in the limiting ring of the adjacent password wheel.