A password lock for a retractable cord

Abstract

The utility model discloses a kind of password locks of telescopic rope, belong to lock technical field, comprising: password lock body, for fixed installation on suitcase;Movable column, movably installed in the password lock body, the movable column inside is equipped with winding assembly;Clamping column, movably installed in the password lock body, and with the movable column symmetrically arranged;Plastic steel wire rope, its first end is connected to the winding assembly, second end is connected to the clamping column;Movable disc, by locating shaft rotation is installed in the password lock body inside;And unlocking assembly, set in the password lock body inside, for when password is correct driving the movable disc rotation, to remove the locking state of the clamping column. Thus, password lock and telescopic binding rope can be integrated in suitcase body, greatly expand the anti-theft protection range of suitcase, effectively solve the pain point that secondary articles are easily lost when traveler carries multiple pieces of luggage.

Description

Technical Field

[0001] This utility model relates to a combination lock with a telescopic rope, belonging to the field of lock technology. Background Technology

[0002] Suitcases have become a common tool for carrying belongings when traveling. Currently, most suitcases on the market are equipped with combination locks, but these locks typically only function to lock the lid or zipper of the suitcase itself, ensuring the safety of the items inside. However, during actual travel, users often need to temporarily place or tie other luggage, such as handbags, backpacks, or even another small suitcase, on the outside of their suitcase. These external items lack effective anti-theft measures and are easily stolen in crowded public places (such as train stations and airports), causing travelers property loss and inconvenience.

[0003] While existing technologies offer independent straps or padlocks for securing items, they suffer from the following drawbacks: they require separate carrying and storage, increasing travel burden and increasing the risk of loss; they are separate from the suitcase itself, making them inconvenient to use and store; and they typically lack a combination lock function, or even if they do have a lock, its structure is independent of the suitcase's lock, making integrated management and convenient operation impossible.

[0004] Therefore, there is an urgent need for a lock solution that can be integrated with the suitcase body, is easy to operate, and can both protect the items inside the suitcase and effectively secure the luggage outside the suitcase. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model provides a combination lock with a retractable rope, which solves the technical problem that existing suitcase combination locks cannot effectively prevent theft and fix luggage items placed outside the suitcase.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A combination lock with a retractable rope, comprising: The combination lock body is used to securely install it on a suitcase; The movable column is movably installed inside the combination lock body, and a winding assembly is provided inside the movable column; The locking pin is movably installed inside the combination lock body and is symmetrically arranged with the movable pin; A plastic steel wire rope, with its first end connected to the winding assembly and its second end connected to the locking post, is used to wrap around and bind luggage on the outside of the suitcase. A movable disc, rotatably mounted inside the combination lock body via a positioning shaft, and located between the movable pin and the locking pin, is used to lock the locking pin inside the combination lock body or unlock it; and An unlocking component, located inside the combination lock body, is used to drive the movable disc to rotate when the password is correct, thereby releasing the locking state of the locking pin.

[0007] Preferably, the winding assembly includes: A pin is fixedly installed inside the movable column; A take-up reel, rotatably mounted via the pin, wherein the first end of the plastic steel wire rope is fixed and wound around the take-up reel; and A torsion spring is sleeved on the pin, and its two ends act on the movable column and the winding reel respectively, to provide the winding reel with a rotational torque to wind up the plastic steel wire rope.

[0008] Preferably, the end of the movable column that extends into the body of the combination lock is provided with a baffle; The surface of the card post is provided with a card slot; The movable disc is configured such that, when in the locked position, its body blocks the baffle to prevent the movable column from disengaging, while its internal structure engages with the slot to prevent the locking column from disengaging.

[0009] Preferably, the movable disk includes: The movable cavity is located inside the movable plate; A locking block, movably disposed within the movable cavity, is used to engage with the locking slot when the locking pin is inserted; and A first compression spring is disposed in the movable cavity, with one end connected to the locking block and the other end connected to the inner wall of the movable cavity, for providing elastic force to the locking block in the direction of the locking slot.

[0010] Preferably, one end of the movable disk has an arc angle; The unlocking assembly includes a combination keypad and multiple coaxially arranged chucks, wherein the multiple chucks are a first chuck, a second chuck, and a third chuck; Each of the multiple chucks has a groove. When the password is correct, the grooves on the multiple chucks align to form an arc groove to accommodate the arc angle. When the arc angle is accommodated within the arc groove, the movable disk can rotate to the unlock position, causing the card block to disengage from the card slot.

[0011] Preferably, the unlocking component further includes: The rotating shaft is fixedly connected to the password disk; The first chuck is fixedly sleeved on the rotating shaft; The second and third chucks are rotatably mounted on the rotating shaft, and the first, second, and third chucks are arranged adjacent to each other axially and can engage and move together; and The second compression spring is sleeved on the rotating shaft and applies axial pressure to the third chuck.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By integrating the combination lock with a retractable binding rope into the suitcase body, the combination lock, which is traditionally only used to lock the suitcase body, can also be used to bind and secure external luggage items, greatly expanding the anti-theft protection range of the suitcase and effectively solving the pain point of travelers easily losing secondary items when carrying multiple pieces of luggage. By integrating the movable column, retracting assembly, locking column, and locking mechanism into the combination lock and securing it to the suitcase, users no longer need to carry additional straps and locks. The plastic steel wire rope can be pulled and used at will, and automatically retracts and stores itself via a torsion spring, preventing rope tangling and greatly improving convenience and neatness. The movable disc is used as the core locking component. In the locked state, the movable disc simultaneously blocks the baffle of the movable column and uses the locking block to lock the slot of the locking column, so that both ends of the rope are firmly locked, preventing the loss of anti-theft function due to failure of one end, and the locking reliability is high. Attached Figure Description

[0013] 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 the structures shown in these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the chuck structure of this utility model; Figure 4 This is a reference diagram showing the usage state of this utility model.

[0015] In the diagram: 1. Combination lock body; 2. Movable pin; 3. Plastic steel wire rope; 4. Combination dial; 5. Locking pin; 6. Baffle; 7. Rope winding reel; 8. Pin; 9. Movable disc; 10. Elastic pressure plate; 11. Locking groove; 12. Locking block; 13. Movable cavity; 14. First compression spring; 15. Positioning shaft; 16. Arc angle; 17. Arc groove; 18. Third chuck; 19. Rotating shaft; 20. Second chuck; 21. First chuck; 22. Handle; 23. Suitcase; 24. Roller. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4 This utility model provides a technical solution: like Figure 1 , Figure 2 and Figure 4 As shown, the combination lock mainly includes the combination lock body 1, the movable pin 2, the plastic steel wire rope 3, the locking pin 5, the movable disc 9, and the unlocking components.

[0018] Furthermore, the combination lock body 1 is made of high-strength ABS engineering plastic with an internal metal lining and a frosted surface. Its housing is fixed to the side wall or end of the suitcase 23 by screws, clips, or adhesive. The combination lock body 1 internally forms a chamber to accommodate other moving parts. The bottom of the suitcase 23 is equipped with wheels 24, and one side of the top of the suitcase 23 has a handle 22. The interior has independent chambers to accommodate the movable pin 2, the locking pin 5, and the movable disc 9. The inner diameter of the mounting holes for the movable pin 2 and the locking pin 5 is 0.1mm larger than the corresponding parts, with a clearance ≤0.05mm to ensure smooth sliding.

[0019] Furthermore, the movable pin 2 is slidably installed in a mounting hole on one side of the combination lock body 1. The movable pin 2 is made of 6061 aluminum alloy with an anodized surface. An internal winding assembly is provided for the movable pin 2. Specifically, as... Figure 2 As shown, the winding assembly includes a winding reel 7 mounted inside the movable column 2 via a pin 8. The inner end of the plastic steel wire rope 3 is fixed and wound around the winding reel 7. A torsion spring is fitted onto the pin 8, one end of which is fixed to the movable column 2, and the other end acts on the winding reel 7, thereby always providing the winding reel 7 with a torque that causes the plastic steel wire rope 3 to rewind. The end of the movable column 2 that extends into the body of the combination lock 1 is provided with a radially protruding baffle 6.

[0020] Furthermore, the locking pin 5 is slidably installed in a mounting hole symmetrical to the movable pin 2 on the other side of the combination lock body 1. The outer end of the plastic steel wire rope 3 is fixedly connected to the outer end of the locking pin 5. A ring-shaped locking groove 11 is formed on the surface of the locking pin 5.

[0021] like Figure 2As shown, the movable disc 9 is rotatably mounted in the center of the internal cavity of the combination lock body 1 via a positioning shaft 15, precisely between the baffle 6 of the movable pin 2 and the slot 11 of the locking pin 5. The movable disc 9 has an internally machined movable cavity 13, within which a wedge-shaped or spherical locking block 12 can slide. One end of the locking block 12 is connected to the inner wall of the movable cavity 13 via a first compression spring 14, giving it a tendency to pop outwards under spring force. The end of the movable disc 9 facing the unlocking assembly has a protruding arc angle 16. Furthermore, an elastic metal pressure plate 10 can be installed on the outer circumference of the movable disc 9 to generate friction with the inner wall of the combination lock body 1 when the movable disc 9 rotates, providing a certain positioning and damping effect.

[0022] It should be noted that the first compression spring 14 is made of 65Mn wire with a diameter of 0.2mm, a free length of 1cm, and an elastic modulus of 1.5N / mm. It provides the spring force for the latch to pop out, ensuring a tight fit in the slot. Its material has a high elastic limit and fatigue strength, making it suitable for frequent extension and retraction applications. The spring's stiffness has been designed, calculated, and experimentally verified. Its selection is based on the following: when the latch 5 is fully inserted and locked, the spring 14 is pre-compressed to the middle of its working stroke. At this point, the spring force is sufficient to overcome the tendency for the latch 12 to separate from the inclined surface of the slot 11 due to slight external force, firmly pressing the latch 12 into the slot 11. Simultaneously, this pre-compression force is far less than the force required to manually insert or remove the latch 5, ensuring the feasibility of normal unlocking operations. The spring's dimensions match the space of the movable cavity 13, ensuring that it does not become unstable or experience uneven loading during operation.

[0023] In this embodiment, to further enhance impact resistance, the locking end face of the locking block 12 is designed as a first inclined surface, while the corresponding bearing surface of the slot 11 is designed as a matching second inclined surface. The included angle formed by these two inclined surfaces is configured as a self-locking angle. When the locking pin 5 is subjected to an external force attempting to pull it out, this force generates a normal pressure and a component force that causes the locking block 12 to tend to retract into the movable cavity 13 through the second inclined surface of the slot 11. Due to the design of the inclined surface angle, the relationship between the retraction component force and the holding force provided by the spring 14 in the direction satisfies the self-locking condition. Within a certain range of external force, the greater the external force attempting to pull out the locking pin 5, the tighter the locking block 12 engages with the slot 11, and the spring will not be compressed, thus achieving a mechanical self-locking effect and greatly enhancing the impact resistance stability of the lock.

[0024] Furthermore, the unlocking assembly includes a combination dial 4 mounted on the outer surface of the combination lock body 1, and a rotating shaft 19 and a chuck mechanism mounted internally. The rotating shaft 19 is fixedly connected to the combination dial 4. A first chuck 21, a second chuck 20, and a third chuck 18 are sequentially mounted on the rotating shaft 19. The first chuck 21 is fixed to the rotating shaft 19 and rotates synchronously with the combination dial 4. The second chuck 20 and the third chuck 18 are loosely mounted on the rotating shaft 19, but their axially adjacent end faces are provided with teeth, which can engage with each other and transmit a certain torque, i.e., they are engaged in a movable installation. A second compression spring is also mounted on the end of the rotating shaft 19, which applies axial pressure to the third chuck 18 to keep the three chucks in close contact. The circumferential edges of the first chuck 21, the second chuck 20, and the third chuck 18 all have a notch at a specific angle. Only when the three chucks rotate to a specific position, i.e., when the combination is correct, will these three notches align on the circumference to form a complete arc-shaped groove, i.e., an arc groove 17.

[0025] The workflow of this embodiment is as follows: Binding and locking process: When it is necessary to secure luggage such as handbags placed on the outside of the suitcase 23, the user holds the locking pin 5 and pulls it outward. The locking pin 5 pulls the plastic steel wire rope 3 out of the rope reel 7 inside the movable pin 2, and at the same time, the rope reel 7 rotates against the torque of the torsion spring. After the plastic steel wire rope 3 is wound around the item to be secured, the end of the locking pin 5 is forcefully inserted into the corresponding hole on the combination lock body 1. During the insertion of the locking pin 5, its inclined end will press the locking block 12 inside the movable plate 9, causing it to retract into the movable cavity 13 and compress the first compression spring 14. When the locking pin 5 is fully inserted, the locking groove 11 on it moves to the position aligned with the locking block 12. Under the elastic force of the first compression spring 14, the locking block 12 quickly pops out and locks into the locking groove 11, thereby mechanically locking the locking pin 5 so that it cannot be pulled out.

[0026] Meanwhile, under the interaction of the locking block 12 and the locking slot 11, and the friction between the elastic pressure plate 10 and the inner wall, the movable disc 9 remains in a stable angular position. This position precisely blocks the movement path of the baffle 6 of the movable column 2, thus preventing the movable column 2 from being pulled outwards. At this point, both ends of the plastic steel wire rope 3, the locking pin ends and the winding ends, are securely locked, and the external luggage is tightly bound and fixed to the suitcase. The unlocking component is misaligned at this time, and the arc angle 16 of the movable disc 9 is pressed against the misaligned edge of the locking disc, preventing it from rotating.

[0027] Unlocking and releasing process: When it is necessary to remove external luggage, the user rotates the combination dial 4 to the correct combination. The combination dial 4 drives the first chuck 21 to rotate via the pivot 19. Due to the interlocking action between the chucks, the rotation will cause the second chuck 20 and the third chuck 18 to rotate in sequence until the notches on the three chucks are completely aligned on the circumference, forming the arc groove 17.

[0028] At this point, the user can press the keypad 4 or directly push the area of ​​the movable disc 9. The specific method depends on the casing design; for example, the corresponding position on the casing could be designed as a spring-loaded button. Since the arc groove 17 has been formed, the arc angle 16 of the movable disc 9 is embedded in the arc groove 17. The pushing force applied by the user causes the movable disc 9 to rotate around the positioning axis 15.

[0029] The rotation of the movable disc 9 brings about two key changes: first, the disc body moves away from the original position of the blocking baffle 6; second, as the angle of the movable disc 9 changes, the wall of its internal movable cavity 13 pushes the locking block 12, causing it to overcome the elastic force of the first compression spring 14 and completely exit from the locking slot 11 of the locking post 5.

[0030] Once the locking block 12 exits the slot 11, the locking pin 5 is released. The user can easily pull the locking pin 5 out of the combination lock body 1. After the locking pin 5 is pulled out, the tension acting on the rope reel 7 disappears, and the torque of the torsion spring drives the rope reel 7 to rotate in the opposite direction, quickly and automatically winding the plastic steel wire rope 3 back onto the rope reel 7, completing the storage. At this time, there is no obstruction in front of the baffle 6 of the movable pin 2, but it usually remains in its original position under the action of the spring's winding force, without affecting the rope retrieval.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A combination lock with a retractable rope, characterized in that, include: The combination lock body (1) is used to be fixedly installed on the suitcase; The movable column (2) is movably installed inside the combination lock body (1), and the movable column (2) is provided with a winding assembly inside; The locking pin (5) is movably installed inside the main body (1) of the combination lock and is symmetrically arranged with the movable pin (2); Plastic steel wire rope (3), with its first end connected to the winding assembly and its second end connected to the locking post (5), is used to wrap and bind luggage on the outside of the suitcase; The movable disc (9), rotatably mounted inside the combination lock body (1) via the positioning shaft (15), and located between the movable pin (2) and the locking pin (5), is used to lock the locking pin (5) inside the combination lock body (1) or to unlock it; and The unlocking component is located inside the main body (1) of the combination lock and is used to drive the movable disk (9) to rotate when the password is correct, so as to release the locking state of the locking pin (5).

2. The combination lock with a retractable rope according to claim 1, characterized in that, The winding assembly includes: Pin (8) is fixedly installed inside the movable column (2); A take-up reel (7) is rotatably mounted via the pin (8), and the first end of the plastic steel wire rope (3) is fixed and wound around the take-up reel (7); and A torsion spring is sleeved on the pin (8), and its two ends act on the movable column (2) and the winding reel (7) respectively, to provide the winding reel (7) with the rotational torque to wind up the plastic steel wire rope (3).

3. A combination lock with a retractable rope according to claim 1, characterized in that, The end of the movable column (2) that extends into the body of the combination lock (1) is provided with a baffle (6). The surface of the card post (5) is provided with a card slot (11); The movable disc (9) is configured such that, when it is in the locked position, its body blocks the baffle (6) to prevent the movable column (2) from disengaging, while its internal structure engages with the slot (11) to prevent the locking column (5) from disengaging.

4. A combination lock with a retractable rope according to claim 3, characterized in that, The movable plate (9) includes: The movable cavity (13) is located inside the movable plate (9); The locking block (12) is movably disposed within the movable cavity (13) and is used to engage with the locking slot (11) when the locking post (5) is inserted; and A first compression spring (14) is disposed in the movable cavity (13), with one end connected to the locking block (12) and the other end connected to the inner wall of the movable cavity (13), for providing elastic force to the locking block (12) in the direction of the locking slot (11).

5. A combination lock with a retractable rope according to claim 4, characterized in that, One end of the movable disk (9) has an arc angle (16). The unlocking assembly includes a combination keypad (4) and multiple chucks arranged coaxially, wherein the multiple chucks are a first chuck (21), a second chuck (20), and a third chuck (18). Each of the multiple chucks has a groove. When the password is correct, the grooves on the multiple chucks are aligned to form an arc groove (17) for accommodating the arc angle (16). When the arc angle (16) is accommodated in the arc groove (17), the movable disk (9) can rotate to the unlock position, so that the card block (12) is disengaged from the card groove (11).

6. A combination lock with a retractable rope according to claim 5, characterized in that, The unlocking component also includes: The rotating shaft (19) is fixedly connected to the password disk (4); The first chuck (21) is fixedly sleeved on the rotating shaft (19); The second chuck (20) and the third chuck (18) are rotatably mounted on the rotating shaft (19) in sequence, and the first chuck (21), the second chuck (20), and the third chuck (18) are arranged adjacent to each other along the axial direction and can engage and move together; and The second compression spring is sleeved on the rotating shaft (19) and applies axial pressure to the third chuck (18).

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