A combination lock with easy changeable combinations

Abstract

The application relates to a password lock convenient for password replacement, which comprises a lock body and a lock rope, the lock body is provided with a plug hole for inserting the end of the lock rope, a password wheel assembly and a lock rod are arranged in the lock body, the password wheel assembly comprises a character wheel and a top wheel, the top wheel is sleeved on the lock rod, and the character wheel is sleeved outside the top wheel, an installation cavity and a code adjusting assembly are further arranged in the lock body, the code adjusting assembly comprises a driving piece and a pressing piece, the lock rod is provided with a pressing end and a driving end, the installation cavity is arranged at the end of the driving end, the driving piece and the pressing piece are arranged in the installation cavity, the lock rod can drive the driving piece to slide along the radial direction of the lock rod, the driving piece pushes the pressing piece and the top wheel to slide along the axial direction of the lock rod, so that the top wheel is separated from the character wheel, and the character wheel is independently rotated in the circumferential direction of the lock rod, and a reset piece for driving the driving piece to reset is arranged in the installation cavity. By adopting the technical scheme, the application provides the password lock convenient for password replacement, and the structure is simple, the operation is convenient, and the password replacement can be quickly completed.

Description

Technical Field

[0001] This invention relates to the field of combination lock technology, and in particular to a combination lock that facilitates changing the combination. Background Technology

[0002] Combination locks, with their compact structure, portability, and keyless operation, are widely used in various anti-theft and locking scenarios, becoming an indispensable type of lock in daily life, travel, and light security applications. Their core working principle involves the rotation and positioning of the combination dial to unlock and lock the bolt.

[0003] With the increasing demands for security, users are placing higher demands on the ease of use of combination locks, with the ease of password change being particularly crucial. In practical use, to ensure security against theft, users often need to change the password regularly or irregularly depending on changes in usage scenarios and the risk of password leakage. For example, in home use, the password needs to be changed to prevent children from accidentally unlocking the lock; in outdoor use, the password needs to be changed to prevent malicious cracking; and in public spaces, the password needs to be changed frequently to ensure security when multiple people share the lock. However, existing combination lock technologies have significant flaws in their password change mechanism design, resulting in a cumbersome and inconvenient password change process, becoming a core pain point restricting the user experience.

[0004] The existing combination lock includes a lock body and a locking cord. One end of the locking cord is fixed to the lock body, and the other end is located inside the lock body, where a combination component and a locking bar are located. The combination component is fitted onto the locking bar. When the combination is correct, it can drive the locking bar to slide within the lock body, unlocking the locking cord. The lock body also has a code-changing button located at one end of the locking bar. The code-changing button has a slot. When the combination needs to be changed, with the combination correct, press the locking bar inward and also press the code-changing button into the lock body, so that the end of the locking bar enters the slot. The locking block on the locking bar disengages from the combination wheel. By rotating the combination wheel, the code can be changed.

[0005] However, this type of structure is cumbersome and prone to errors. If a mistake is made during operation, the entire process must be restarted, severely impacting the user experience. Currently, although some companies in the industry have attempted to optimize the password changing structure of combination locks, most of them only make simple adjustments to the operation steps, failing to fundamentally solve the core problems of cumbersome structure and inconvenient operation. Furthermore, some optimization solutions sacrifice the anti-theft performance of the lock, making it difficult for the product to balance convenience and security. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art by providing a combination lock that is easy to change the password, with a simple structure, convenient operation, and the ability to quickly change the password.

[0007] The technical solution of this invention: A combination lock for easy combination changing, comprising a lock body and a lock cord. The lock body has a socket for inserting the end of the lock cord. The lock body contains a combination wheel assembly and a lock rod. The combination wheel assembly includes multiple number wheels and multiple rotating wheels, each rotating wheel being sequentially sleeved on the lock rod with their end faces abutting each other. Each number wheel is sleeved on the corresponding rotating wheel and drives the rotating wheel to rotate circumferentially relative to the lock rod. The lock rod has multiple protrusions, and each rotating wheel has a slot for the protrusions to pass through. The number wheel portion is exposed outside the lock body. The lock rod has a locked state and an unlocked state. In the locked state, the lock rod and the end of the lock cord are in a limited engagement. In the unlocked state, the lock rod slides axially relative to the lock body, and the lock cord can be disengaged from the socket. The lock body also contains a return spring for resetting the lock rod to the outside of the lock body. The lock body also contains an installation chamber and a code adjustment assembly. The code adjustment assembly includes a drive component and a... The locking rod has a pressing end and a driving end. The mounting chamber is located at the end of the driving end and has a slot for the locking rod to enter and exit. The driving component and the pressing component are located in the mounting chamber. The pressing component is partially exposed outside the mounting chamber and abuts against the adjacent gyroscope. The driving component has a first inclined surface and a first pressing surface. The pressing component has a second pressing surface that fits against the first pressing surface. The end of the locking rod is arc-shaped or inclined. When the locking rod is unlocked, the driving end of the locking rod is in contact with the first inclined surface or has a gap. When the locking rod is pressed into the lock body again in the unlocked state, the locking rod can drive the driving component to slide radially along the locking rod. The driving component pushes the pressing component and the gyroscope to slide axially along the locking rod, so that the gyroscope is disengaged from the digit wheel. The digit wheel rotates circumferentially relative to the locking rod. The mounting chamber is provided with a reset component to drive the driving component to reset.

[0008] Using the above technical solution, after the correct password is entered, the lock bar can slide axially relative to the password wheel assembly. Pressing the lock bar into the lock body at this time limits the contact between the lock bar and the lock rope, allowing the end of the lock rope to be pulled out, thus unlocking the lock. When the password needs to be changed, in the unlocked state, continuing to press the lock bar inwards causes the drive end of the lock bar to enter the mounting cavity. Due to the first inclined surface on the drive component, the drive end of the lock bar drives the drive component to slide radially along the lock bar. During this sliding, the first and second abutment surfaces cooperate to drive the abutment component to slide towards the pressing end of the lock bar. The abutment component drives the gyroscope to slide synchronously, separating the gyroscope from the number wheel. At this time, the number wheel can be rotated independently to change the password. After the password change is complete, releasing the lock bar causes it to return to its original position outside the lock body under the action of the return spring. The drive component also returns to its original position under the action of the return component. The gyroscope and the abutment component can then be... The lock resets under the action of the return spring, completing the password change. Scrambling the dial wheel locks the lock, making operation more convenient. The dial wheel can rotate independently relative to the lock bar. Users do not need to disassemble the lock body or use external tools; they can enter the code-changing state simply by pressing the lock bar, making operation convenient and efficient. The end of the lock bar is designed with an arc or bevel, which can smoothly drive the drive component to slide without jamming, ensuring the smoothness of the code-changing action. The original lock bar, password wheel assembly, and return spring are retained to ensure that the core locking and unlocking functions of the combination lock are not affected. While achieving convenient code-changing, the reliability of the lock is also taken into account, making it suitable for various scenarios that require frequent password changes. The slot design of the installation chamber not only ensures that the lock bar can move in and out smoothly, but also limits the drive component and the pressing component, preventing the code-changing component from shifting or falling off during movement, thus improving the stability and service life of the lock's internal structure.

[0009] A further feature of the present invention is that there are two driving components and two reset components. The two driving components are arranged opposite to each other, and the two reset components are located at the ends of the two driving components that are far apart from each other. The axial sliding of the locking rod can drive the two driving components to move in opposite directions, thereby driving the gyroscope to separate from the character wheel to achieve code adjustment. The reset components can drive the two driving components to move towards each other, thereby driving the gyroscope to connect with the character wheel to achieve synchronous rotation.

[0010] With the above-mentioned further configuration, two opposing drive components are set up. When the lock bar slides axially, the two drive components can be driven to move in opposite directions simultaneously, thereby synchronously pushing the pressing component to contact the rotor, so that the rotor and the number wheel are evenly separated. This avoids rotor offset and jamming caused by unilateral force, ensuring a smooth code adjustment process, while reducing wear on the rotor and number wheel and extending the service life of the components. Two reset components are respectively set at the ends of the two drive components that are far apart. After the code adjustment is completed, the reset components can drive the two drive components to move towards each other simultaneously, so that the rotor and the number wheel are accurately reset and tightly matched, ensuring the consistency of synchronous rotation of the number wheel and the rotor, and avoiding the combination lock from malfunctioning due to reset deviation. The symmetrical design of the drive components and reset components makes the lock bar evenly stressed, making it easier to press the lock bar, further optimizing the user operation experience, while making the internal structure layout of the lock more reasonable and improving the overall structural balance and stability.

[0011] A further provision of the present invention: both driving members have V-shaped protrusions on their sides facing the pressing member. The protrusions have the first inclined surface and the first pressing surface. The first pressing surface can be an arc surface or an inclined surface. The pressing member has a second pressing surface along its circumference. The second pressing surface is inclined.

[0012] With the above-mentioned further configuration, the first pressing surface on the protrusion and the second pressing surface of the pressing member are precisely fitted together. When the locking rod is pressed, the first inclined surface can guide the driving member to slide smoothly. At the same time, the fit between the first and second pressing surfaces can smoothly convert the radial movement of the driving member into the axial movement of the pressing member, avoiding problems such as jamming and uneven force during the movement transmission. The first pressing surface is set as an arc or inclined surface, and the second pressing surface is set at an angle, which further reduces the frictional resistance between the driving member and the pressing member, making the pressing action during code adjustment smoother and less strenuous, while reducing component wear and extending the service life of the code adjustment assembly. The second pressing surface is set along the circumference of the pressing member to ensure that the pressing member and the V-shaped protrusion of the driving member are fully fitted together, the force is more uniform, and the excessive local force is avoided, which may cause deformation of the pressing member, thus ensuring the stability and reliability of the code adjustment action.

[0013] A further feature of the present invention is that the reset member is provided with a spring, and the driving member has a groove and a T-shaped positioning member on the side away from the pressing member. The spring is located in the groove, with one end sleeved on the positioning member and the other end abutting against the inner wall of the lock body.

[0014] With the above-mentioned further design, the spring has the advantages of good elasticity, reliable reset, and low cost. It can stably provide driving force, ensuring that the driving component is accurately reset after code adjustment, so that the gyroscope and the number wheel are tightly matched, ensuring the normal use of the combination lock. The driving component is equipped with a groove and a T-shaped positioning component. One end of the spring is fitted onto the positioning component, and the other end abuts against the inner wall of the lock body. The positioning component can accurately position the spring, preventing the spring from shifting or falling off during extension and contraction. At the same time, the groove can accommodate and limit the spring, further improving the installation stability of the reset component. The design of the T-shaped positioning component can effectively prevent the spring from falling off the positioning component, ensuring that the spring's reset force is stably transmitted to the driving component, avoiding the reset deviation of the driving component due to spring offset, and thus ensuring that the locking and unlocking functions of the lock are normal after code adjustment.

[0015] A further embodiment of the present invention includes: an integrally formed or fixedly connected fixing block at the end of the pressing end of the locking rod; a through hole corresponding to the insertion hole on the fixing block; a limiting block on the side wall of the through hole near the adjusting component; an integrally formed or fixedly connected insertion block at the end of the locking rope; a limiting part on the insertion block; when the insertion block is located in the through hole and the limiting block is located above the limiting part, the locking rope is in a locked state; when the limiting block and the limiting part are misaligned, the locking rope is in an unlocked state; and the two ends of the reset spring are respectively abutted against the gyroscope and the fixing block to drive the locking rod to reset.

[0016] With the above-mentioned further design, after the insert block at the end of the lock rope is inserted into the through hole, the limiting block and the limiting part of the insert block cooperate to lock the lock rope. When unlocking, the lock rod slides axially, causing the limiting block and the limiting part to misalign, allowing the lock rope to quickly disengage. The structure is simple, the locking is reliable, and it prevents the lock rope from accidentally falling off. The two ends of the return spring abut against the gyroscope and the fixed block, respectively. This not only drives the lock rod and the gyroscope to automatically reset, ensuring that the lock rod returns to the initial locked position after the code is adjusted, and the gyroscope and the number wheel are reconnected, but also buffers the sliding of the lock rod, reducing the impact when the lock rod moves, protecting the internal components of the lock, and extending its service life. The insert block is integrated with or fixedly connected to the lock rope, and the fixed block is integrated with or fixedly connected to the lock rod. The overall structure is strong, the assembly is convenient, and the fit between the lock rope and the lock rod is improved, preventing the connection from loosening after long-term use.

[0017] A further feature of the present invention is that: the two ends of the fixing block are provided with limiting plates, and the inner wall of the lock body is provided with limiting protrusions. The limiting plates and the limiting protrusions cooperate to limit the locking rod from disengaging from the lock body.

[0018] By adopting the above-mentioned further design, the axial sliding of the lock rod can be limited, preventing the lock rod from sliding excessively and detaching from the lock body under the action of the return spring, thus ensuring the integrity of the lock structure and the reliability of use. The limiting and cooperating structure is simple and does not require additional complex components. Without increasing the size and cost of the lock body, it effectively improves the installation stability of the lock rod, while not affecting the normal sliding, code adjustment, and unlocking operations of the lock rod.

[0019] A further feature of the present invention is that: a plurality of positioning grooves are evenly distributed along the circumference of the inner circumferential surface of the character wheel, and at least one positioning block is provided on the outer circumferential surface of the gyroscope. When the positioning block is located in the positioning groove, the gyroscope and the character wheel rotate synchronously. When the positioning block is disengaged from the positioning groove, the character wheel can rotate independently relative to the gyroscope.

[0020] With the above-mentioned further design, when the positioning block is located in the positioning groove, the character wheel and the gyroscope rotate synchronously, ensuring the accuracy of password adjustment and locking; during code adjustment, the gyroscope disengages from the character wheel, the positioning block disengages from the positioning groove, and the character wheel can rotate independently, realizing free adjustment of the password. The structural design is precise and the fit is reliable; the positioning grooves are evenly distributed, making the fit between the character wheel and the gyroscope tighter and the force more even, avoiding slippage and ensuring the accuracy of password input; at least one positioning block is set, which can not only achieve synchronous rotation, but also simplify the structure and reduce processing costs.

[0021] A further provision of the present invention includes: a bracket provided inside the lock body, a receiving groove and the mounting chamber provided on the bracket, the receiving groove communicating with the mounting chamber, the combination wheel assembly disposed in the receiving groove, the upper end of the receiving groove being open, and an opening provided on the lock body corresponding to the position of the receiving groove to expose the combination wheel.

[0022] The above-mentioned further design ensures clear partitioning and a reasonable layout of the lock's internal structure, preventing interference between components and improving the overall stability of the structure. An opening is provided on the lock body corresponding to the receiving slot, exposing the dial wheel for easy input and adjustment of the password. This opening also provides some protection for the dial wheel, preventing dust and debris from entering the receiving slot and affecting the normal operation of the dial wheel assembly. The bracket provides fixation and support for the dial wheel assembly and the code adjustment assembly, improving the installation stability of each component and preventing loosening or misalignment after long-term use, thus extending the lock's lifespan.

[0023] A further feature of the present invention is that the bottom of the receiving groove is provided with a through groove and a spring piece corresponding to each character position. One end of the spring piece is integrally formed on the inner wall of the through groove, and the outer peripheral surface of the character abuts against the spring piece.

[0024] The further design described above provides positioning and buffering for the digit wheel, preventing it from rotating arbitrarily and ensuring the accuracy of the password input. One end of the spring is integrally formed into the inner wall of the through groove, resulting in a strong overall structure and convenient assembly. Simultaneously, the spring has a certain degree of elasticity, adapting to the rotation of the digit wheel and reducing friction between the digit wheel and the spring. This ensures positioning without affecting the normal rotation of the digit wheel and the code adjustment operation. The spring design effectively prevents the digit wheel from rotating due to external forces such as vibration and collision, avoiding password errors and improving the security and reliability of the combination lock. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention; Figure 2 This is a cross-sectional view of a specific embodiment of the present invention; Figure 3 This is a cross-sectional view from another direction of a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the cipher wheel assembly and bracket according to a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the combination wheel assembly and locking bar according to a specific embodiment of the present invention; Figure 6 This is a schematic diagram of the driving component and the reset component according to a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the protrusion on the drive component according to a specific embodiment of the present invention; Figure 8 This is a schematic diagram of the pressing component according to a specific embodiment of the present invention; Figure 9 This is a schematic diagram of the locking rod according to a specific embodiment of the present invention; Figure 10 This is a schematic diagram of a bracket according to a specific embodiment of the present invention; Figure 11 This is a partial schematic diagram of the locking rope according to a specific embodiment of the present invention; Figure 12 This is a schematic diagram of a character wheel according to a specific embodiment of the present invention; Figure 13 This is a schematic diagram of a specific embodiment of the gyroscope of the present invention.

[0026] In the diagram, 1. Lock body; 11. Insertion hole; 12. Return spring; 13. Positioning protrusion; 14. Opening; 2. Lock rope; 21. Insert block; 211. Limiting part; 3. Combination wheel assembly; 31. Number wheel; 311. Positioning groove; 32. Rotating wheel; 321. Slot; 322. Positioning block; 4. Lock rod; 41. Protrusion; 42. Pressing end; 43. Driving end; 44. Fixing block; 441. Through hole; 442. Limiting block; 443. Limiting plate; 5. Mounting chamber; 51. Slot; 52. Returning component; 6. Code adjustment assembly; 61. Driving component; 611. First inclined surface; 612. First pressing surface; 613. Protrusion; 614. Groove; 615. Positioning component; 62. Pressing component; 621. Second pressing surface; 7. Bracket; 71. Receiving groove; 711. Through groove; 712. Spring piece. Detailed Implementation

[0027] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that in the description of this invention, all directional indications (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] Furthermore, in this invention, the use of terms such as "first," "second," etc., 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. In the description of this invention, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If 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 the present invention.

[0031] like Figure 1-13As shown, a combination lock for easy combination changing includes a lock body 1 and a locking cord 2. The lock body 1 has an insertion hole 11 for inserting the end of the locking cord 2. The lock body 1 contains a combination wheel assembly 3 and a locking rod 4. The combination wheel assembly 3 includes multiple number wheels 31 and multiple rotating wheels 32. Each rotating wheel 32 is sequentially sleeved on the locking rod 4, with the end faces of each rotating wheel 32 abutting each other. Each number wheel 31 is sleeved on the corresponding rotating wheel 32 and drives the rotating wheel 32 to rotate circumferentially relative to the locking rod 4. The locking rod 4 has multiple protrusions 41, and each rotating wheel 32 has a slot 321 for the protrusions 41 to pass through. The number wheels 31 are partially exposed outside the lock body 1. The locking rod 4 has a locked state and an unlocked state. In the locked state, the locking rod 4 is in a limiting engagement with the end of the locking cord 2. In the unlocked state, the locking rod... 4. The lock rod 4 slides axially relative to the lock body 1, allowing the lock rope 2 to disengage from the insertion hole 11. The lock body 1 also includes a return spring 12 for resetting the lock rod 4 to the outside of the lock body 1. The lock body 1 further includes an installation chamber 5 and a code adjustment assembly 6. The code adjustment assembly 6 includes a driving component 61 and a pressing component 62. The lock rod 4 has a pressing end 42 and a driving end 43. The installation chamber 5 is located at the end of the driving end 43, and has a slot 51 for the lock rod 4 to enter and exit. The driving component 61 and the pressing component 62 are located within the installation chamber 5. The pressing component 62 partially protrudes outside the installation chamber 5 and abuts against the adjacent swivel wheel 32. The driving component 61 has a first inclined surface 611 and a first pressing surface 612. The pressing component 62 has a... The second abutting surface 621 is in contact with the first abutting surface 612. The end of the locking rod 4 is set with an arc surface or an inclined surface. When the locking rod 4 is unlocked, the driving end 43 of the locking rod 4 is in contact with the first inclined surface 611 or there is a gap. If only unlocking is required, when the locking rod 4 is pressed inward, there may be a gap between the driving end 43 of the locking rod 4 and the first inclined surface, or the driving end 43 may just be in contact with the first inclined surface 611, but it cannot push the driving block to move radially, thus avoiding unintentional password modification. When the locking rod 4 is in the unlocked state, when the locking rod 4 is pressed into the lock body 1 again, the locking rod 4 can drive the driving member 61 to slide radially along the locking rod 4. The driving member 61 pushes against the pressing member 62 and the gyroscope 32 to slide axially along the locking rod 4, so that the gyroscope 32 and the number wheel can slide together. When the combination wheel 31 disengages, it rotates circumferentially relative to the locking rod 4. When changing the combination, the distance the locking rod moves must be greater than the distance it moves to unlock. The installation chamber 5 is equipped with a reset member 52 that drives the driving member 61 to reset. After the combination is entered correctly, the locking rod 4 can slide axially relative to the combination wheel assembly 3. At this time, pressing the locking rod 4 into the lock body 1 can make the locking rod 4 contact and limit the locking rope 2. The end of the locking rope 2 can be pulled out to unlock. When it is necessary to change the combination, in the unlocked state, continue to press the locking rod 4 inward. The driving end 43 of the locking rod 4 will enter the installation chamber 5. Due to the setting of the first inclined surface 611 on the driving member 61, the driving end 43 of the locking rod 4 will drive the driving member 61 to slide radially along the locking rod 4. When the driving member 61 slides,Through the cooperation of the first pressing surface 612 and the second pressing surface 621, the pressing member 62 is driven to slide towards the pressing end 42 of the locking rod 4. The pressing member 62 drives the gyroscope 32 to slide synchronously, so that the gyroscope 32 separates from the dial wheel 31. At this time, the dial wheel 31 can be rotated to rotate independently for changing the code. After the change is completed, the locking rod 4 is released, and the locking rod 4 returns to the outside of the lock body 1 under the action of the return spring 12. The driving member 61 returns to the reset position under the action of the reset member 52. The gyroscope 32 and the pressing member 62 can also return to the reset position under the action of the return spring 12. The code change is completed. The dial wheel 31 can be scrambled to lock the lock. The operation is more convenient. The dial wheel 31 can rotate circumferentially relative to the locking rod 4 independently. The user does not need to disassemble the lock body 1 or use external tools. The lock can be activated by simply pressing the locking lever 4, making operation convenient and efficient. The end of the locking lever 4 is designed with an arc or bevel, allowing the drive component 61 to slide smoothly without jamming, ensuring a smooth locking action. The original basic structure of the locking lever 4, combination wheel assembly 3, and return spring 12 is retained, ensuring that the core locking and unlocking functions of the combination lock are not affected. While achieving convenient locking, the reliability of the lock is also considered, making it suitable for various scenarios requiring frequent password changes. The slot 51 design of the mounting chamber 5 ensures that the locking lever 4 can move in and out smoothly, and also limits the movement of the drive component 61 and the pressing component 62, preventing the locking component 6 from shifting or falling off during movement, thus improving the stability and service life of the lock's internal structure.

[0032] Two drive members 61 and two reset members 52 are provided. The two drive members 61 are arranged opposite each other, and the two reset members 52 are located at the ends of the two drive members 61 that are far apart from each other. The axial sliding of the locking rod 4 can drive the two drive members 61 to move in opposite directions, thereby driving the gyroscope 32 to separate from the character wheel 31 to achieve code adjustment. The reset members 52 can drive the two drive members 61 to move towards each other, thereby driving the gyroscope 32 to connect with the character wheel 31 to achieve synchronous rotation. By providing two opposite drive members 61, when the locking rod 4 slides axially, it can simultaneously drive the two drive members 61 to move in opposite directions, thereby synchronously pushing the pressing member 62 to contact the gyroscope 32, so that the gyroscope 32 and the character wheel 31 are evenly separated, avoiding the gyroscope 32 from shifting or jamming due to unilateral force. This design ensures a smooth coding process, reduces wear on the rotor 32 and the number wheel 31, and extends the service life of the components. Two reset pieces 52 are located at opposite ends of the two drive pieces 61. After coding is completed, the reset pieces 52 simultaneously drive the two drive pieces 61 to move towards each other, ensuring precise reset and tight engagement of the rotor 32 and the number wheel 31. This guarantees the consistency of synchronous rotation between the number wheel 31 and the rotor 32, preventing the combination lock from malfunctioning due to reset deviations. The symmetrical design of the drive pieces 61 and reset pieces 52 ensures even force distribution on the locking rod 4, making pressing the locking rod 4 easier and further optimizing the user experience. It also makes the internal structure layout of the lock more rational, improving the overall structural balance and stability. Stability; Both driving members 61 have V-shaped protrusions 613 on their sides facing the pressing member 62. Each protrusion 613 has a first inclined surface 611 and a first pressing surface 612. The first pressing surface 612 can be arc-shaped or inclined. The pressing member 62 has a second pressing surface 621 arranged circumferentially, which is inclined. The first pressing surface 612 on the protrusion 613 and the second pressing surface 621 on the pressing member 62 precisely fit together. When the locking rod 4 is pressed, the first inclined surface 611 guides the driving member 61 to slide smoothly. Simultaneously, the fit between the first pressing surface 612 and the second pressing surface 621 ensures that the driving member... The radial movement of the drive component 61 is smoothly converted into the axial movement of the pressing component 62, avoiding problems such as jamming and uneven force during the motion transmission process. The first pressing surface 612 is set as an arc surface or inclined surface, and the second pressing surface 621 is set at an angle, which further reduces the frictional resistance between the drive component 61 and the pressing component 62, making the pressing action during code adjustment smoother and less strenuous, while reducing component wear and extending the service life of the code adjustment assembly 6. The second pressing surface 621 is set along the circumferential direction on the pressing component 62 to ensure that the pressing component 62 and the V-shaped protrusion 613 of the drive component 61 are fully fitted, the force is more uniform, and the excessive local force is avoided, which may cause the pressing component 62 to deform, thus ensuring the stability and reliability of the code adjustment action.

[0033] The reset component 52 is spring-loaded. The driving component 61 has a groove 614 and a T-shaped positioning component 615 on its side away from the pressing component 62. The spring is located within the groove 614, with one end fitted onto the positioning component 615 and the other end abutting against the inner wall of the lock body 1. The spring has advantages such as good elasticity, reliable reset, and low cost, providing stable driving force to ensure accurate reset of the driving component 61 after code adjustment, allowing the gyroscope 32 and the number wheel 31 to fit tightly together, ensuring the normal operation of the combination lock. The driving component 61 has a groove 614 and a T-shaped positioning component 615. One end of the spring is fitted onto the positioning component 615, and the other end abuts against the inner wall of the lock body 1. The positioning component 61... 5 can accurately position the spring, preventing it from shifting or falling off during extension and retraction. At the same time, the groove 614 accommodates and limits the spring, further improving the installation stability of the reset component 52. The design of the T-shaped positioning component 615 can effectively prevent the spring from falling off the positioning component 615, ensuring that the spring's reset force is stably transmitted to the drive component 61, avoiding the reset deviation of the drive component 61 due to spring offset, and thus ensuring that the locking and unlocking functions of the lock are normal after the code is adjusted. The reset component 52 can also be set with a V-shaped spring 712. One side of the V-shaped spring abuts against the inner wall of the lock body 1, and the other side abuts against the drive component 61. When the drive component 61 slides, the spring can be elastically deformed.

[0034] The end of the pressing end 42 of the locking rod 4 is integrally provided with or fixedly connected to a fixing block 44. The fixing block 44 is provided with a through hole 441 corresponding to the insertion hole 11. A limiting block 442 is provided on the side wall of the through hole 441 near the adjusting component 6. The end of the locking rope 2 is integrally provided with or fixedly connected to an insertion block 21. The insertion block 21 is provided with a limiting part 211. When the insertion block 21 is located in the through hole 441 and the limiting block 442 is located above the limiting part 211, the locking rope 2 is in a locked state. When the limiting block 442 is misaligned with the limiting part 211, the locking rope 2 is in an unlocked state. In the locked state, the two ends of the return spring 12 abut against the gyroscope 32 and the fixing block 44 respectively, driving the locking rod 4 to reset. After the insertion block 21 at the end of the locking rope 2 is inserted into the through hole 441, the limiting block 442 cooperates with the limiting part 211 of the insertion block 21 to lock the locking rope 2. When unlocking, the locking rod 4 slides axially, causing the limiting block 442 and the limiting part 211 to misalign, allowing the locking rope 2 to quickly disengage. The structure is simple, the locking is reliable, and it prevents the locking rope 2 from accidentally falling off. The two ends of the return spring 12 abut against the gyroscope 32 and the fixing block 44 respectively, which can drive the locking rod 4 and the locking rod 4 to reset. The gyroscope 32 automatically resets, ensuring that the locking rod 4 returns to its initial locked position after the code is adjusted. The gyroscope 32 reconnects with the number wheel 31, which also buffers the slippage of the locking rod 4, reducing the impact during its movement, protecting the internal components of the lock, and extending its service life. The insert block 21 is integrally or fixedly connected to the locking rope 2, and the fixing block 44 is integrally or fixedly connected to the locking rod 4, resulting in a strong overall structure, convenient assembly, and improved stability of the connection between the locking rope 2 and the locking rod 4, preventing loosening after long-term use. Limiting plates are provided at both ends of the fixing block 44. 443, The inner wall of the lock body 1 is provided with a limiting protrusion. The limiting plate 443 cooperates with the limiting protrusion to prevent the locking rod 4 from disengaging from the lock body 1. It can limit the axial sliding of the locking rod 4 and prevent the locking rod 4 from sliding excessively and disengaging from the lock body 1 under the action of the return spring 12, thus ensuring the integrity of the lock structure and the reliability of use. The limiting cooperation structure is simple and does not require additional complex components. Without increasing the size and cost of the lock body, it effectively improves the installation stability of the locking rod 4, while not affecting the normal sliding and code adjustment and unlocking operations of the locking rod 4.

[0035] The inner circumferential surface of the character wheel 31 is evenly distributed with several positioning grooves 311. The outer circumferential surface of the gyroscope 32 is provided with at least one positioning block 322. When the positioning block 322 is located in the positioning groove 311, the gyroscope 32 and the character wheel 31 rotate synchronously. When the positioning block 322 is disengaged from the positioning groove 311, the character wheel 31 can rotate independently relative to the gyroscope 32. The synchronous rotation of the character wheel 31 and the gyroscope 32 when the positioning block 322 is located in the positioning groove 311 ensures the accuracy of password adjustment and locking. During password adjustment, the gyroscope 32 disengages from the character wheel 31, the positioning block 322 disengages from the positioning groove 311, and the character wheel 31 can rotate independently, realizing free adjustment of the password. The structure is precisely designed and the fit is reliable. The even distribution of the positioning grooves 311 makes the fit between the character wheel 31 and the gyroscope 32 tighter and the force more even, avoiding slippage and ensuring the accuracy of password input. The provision of at least one positioning block 322 not only enables synchronous rotation but also simplifies the structure and reduces processing costs.

[0036] The lock body 1 is equipped with a bracket 7, which has a receiving groove 71 and an installation chamber 5. The receiving groove 71 communicates with the installation chamber 5. The combination wheel assembly 3 is located in the receiving groove 71, which is open at the top. The lock body 1 has an opening 14 corresponding to the receiving groove 71 to expose the pin wheel 31, making the internal structure of the lock clearly divided and rationally laid out, avoiding mutual interference between components, and improving the stability of the overall structure. The opening 14 on the lock body 1 corresponding to the receiving groove 71 exposes the pin wheel 31, making it convenient for users to input and adjust the password. At the same time, the design of the opening 14 can also protect the pin wheel 31 to a certain extent, preventing dust and debris from entering the receiving groove 71 and affecting the normal operation of the combination wheel assembly 3. The bracket 7 can fix and support the combination wheel assembly 3 and the code adjustment assembly 6, improving the installation stability of each component and preventing partial failure after long-term use. To address issues of loose or misaligned components and extend the lifespan of the lock, the bottom of the receiving groove 71 is provided with a through groove 711 and a spring piece 712 corresponding to each character position. One end of the spring piece 712 is integrally formed on the inner wall of the through groove 711, and the outer peripheral surface of the character abuts against the spring piece 712, which can position and buffer the character wheel 31, preventing the character wheel 31 from rotating arbitrarily and ensuring the accuracy of password input. The spring piece 712 is integrally formed on the inner wall of the through groove 711, resulting in a strong overall structure and convenient assembly. At the same time, the spring piece 712 has a certain degree of elasticity, which can adapt to the rotation of the character wheel 31, reducing the friction between the character wheel 31 and the spring piece 712. This ensures the positioning effect without affecting the normal rotation of the character wheel 31 and the code adjustment operation. The setting of the spring piece 712 can effectively prevent the character wheel 31 from rotating due to external forces such as vibration and collision, avoid password scrambling, improve the security and reliability of the combination lock, and also improve the operating feel.

Claims

1. A combination lock with a convenient combination change function, comprising a lock body (1) and a lock cord (2), wherein the lock body (1) is provided with an insertion hole (11) for inserting the end of the lock cord (2), and the lock body (1) is provided with a combination wheel assembly (3) and a lock rod (4), wherein the combination wheel assembly (3) includes multiple number wheels (31) and multiple spools (32), each spool (32) is sequentially sleeved on the lock rod (4), and the end faces of each spool (32) abut against each other, each number wheel (31) is sleeved on the corresponding spool (32) and drives the spool (32) to rotate circumferentially relative to the lock rod (4), and the lock... The rod (4) is provided with multiple protrusions (41), and each gyroscope (32) is provided with a slot (321) for the protrusions (41) to pass through. The gyroscope (31) is partially exposed outside the lock body (1). The locking rod (4) has a locked state and an unlocked state. In the locked state, the locking rod (4) is limited to the end of the locking rope (2). In the unlocked state, the locking rod (4) slides axially relative to the lock body (1), and the locking rope (2) can be disengaged from the insertion hole (11). The lock body (1) is also provided with a return spring (12) for resetting the locking rod (4) to the outside of the lock body (1). The characteristic is that... The lock body (1) is further provided with an installation chamber (5) and a code adjustment assembly (6). The code adjustment assembly (6) includes a drive member (61) and a pressing member (62). The lock rod (4) has a pressing end (42) and a drive end (43). The installation chamber (5) is located at the end of the drive end (43), and the installation chamber (5) is provided with a slot (51) for the lock rod (4) to enter and exit. The drive member (61) and the pressing member (62) are located in the installation chamber (5). The pressing member (62) is partially exposed outside the installation chamber (5) and abuts against the adjacent gyroscope (32). The drive member (61) is provided with a first inclined surface (611) and a first pressing surface (612). The pressing member (62) is provided with a first inclined surface (611) and a first pressing surface (612). The second abutting surface (621) is in contact with the abutting surface (612). The end of the locking rod (4) is set with an arc surface or an inclined surface. When the locking rod (4) is unlocked, the driving end (43) of the locking rod (4) is in contact with the first inclined surface (611) or has a gap. When the locking rod (4) is in the unlocked state, when the locking rod (4) is pressed into the lock body (1) again, the locking rod (4) can drive the driving member (61) to slide along the radial direction of the locking rod (4). The driving member (61) pushes the abutting member (62) and the gyroscope (32) to slide along the axial direction of the locking rod (4) so ​​that the gyroscope (32) is disengaged from the character wheel (31) and the character wheel (31) rotates circumferentially relative to the locking rod (4) alone. The mounting chamber (5) is provided with a reset member (52) that drives the driving member (61) to reset.

2. The combination lock for convenient password changing according to claim 1, characterized in that, Two drive components (61) and two reset components (52) are provided. The two drive components (61) are arranged opposite each other, and the two reset components (52) are located at the ends of the two drive components (61) that are far apart. The axial sliding of the locking rod (4) can drive the two drive components (61) to move in opposite directions, thereby driving the gyroscope (32) to separate from the character wheel (31) to achieve code adjustment. The reset component (52) can drive the two drive components (61) to move towards each other, thereby driving the gyroscope (32) to connect with the character wheel (31) to achieve synchronous rotation.

3. The combination lock for convenient password changing according to claim 2, characterized in that, Both drive members (61) have V-shaped protrusions (613) on their sides facing the pressing member (62). The protrusions (613) have the first inclined surface (611) and the first pressing surface (612). The first pressing surface (612) can be an arc surface or an inclined surface. The pressing member (62) has a second pressing surface (621) along its circumference. The second pressing surface (621) is inclined.

4. The combination lock for convenient password changing according to claim 2 or 3, characterized in that, The reset component (52) is spring-loaded. The drive component (61) has a groove (614) and a T-shaped positioning component (615) on the side away from the pressing component (62). The spring is located in the groove (614), with one end sleeved on the positioning component (615) and the other end abutting against the inner wall of the lock body (1).

5. The combination lock for convenient password changing according to claim 1, 2, or 3, characterized in that, The end of the pressing end (42) of the locking rod (4) is integrally provided with or fixedly connected to a fixing block (44). The fixing block (44) is provided with a through hole (441) corresponding to the insertion hole (11). The side wall of the through hole (441) near the adjustment component (6) is provided with a limiting block (442). The end of the locking rope (2) is integrally provided with or connected to an insertion block (21). The insertion block (21) is provided with a limiting part (211). When the insertion block (21) is located in the through hole (441) and the limiting block (442) is located above the limiting part (211), the locking rope (2) is in a locked state. When the limiting block (442) and the limiting part (211) are misaligned, the locking rope (2) is in an unlocked state. The two ends of the reset spring (12) are respectively in contact with the gyroscope (32) and the fixing block (44) to drive the locking rod (4) to reset.

6. The combination lock for convenient password changing according to claim 5, characterized in that, The fixed block (44) has a limiting plate (443) at both ends, and a limiting protrusion is provided on the inner wall of the lock body (1). The limiting plate (443) and the limiting protrusion cooperate to prevent the lock rod (4) from disengaging from the lock body (1).

7. The combination lock for convenient password changing according to claim 1, 2, or 3, characterized in that, The inner circumferential surface of the character wheel (31) is evenly distributed with a number of positioning grooves (311) along its circumference. The outer circumferential surface of the gyroscope (32) is provided with at least one positioning block (322). When the positioning block (322) is located in the positioning groove (311), the gyroscope (32) and the character wheel (31) rotate synchronously. When the positioning block (322) is disengaged from the positioning groove (311), the character wheel (31) can rotate independently relative to the gyroscope (32).

8. The combination lock for convenient password changing according to claim 1, 2, or 3, characterized in that, The lock body (1) is provided with a bracket (7), the bracket (7) is provided with a receiving groove (71) and the mounting chamber (5), the receiving groove (71) is connected to the mounting chamber (5), the combination wheel assembly (3) is provided in the receiving groove (71), the upper end of the receiving groove (71) is open, and the lock body (1) is provided with an opening (14) corresponding to the receiving groove (71) so that the number wheel (31) is exposed.

9. The combination lock for convenient password changing according to claim 8, characterized in that, The bottom of the receiving groove (71) is provided with a through groove (711) and a spring piece (712) corresponding to each character position. One end of the spring piece (712) is integrally formed on the inner wall of the through groove (711), and the outer peripheral surface of the character abuts against the spring piece (712).

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