A NFC near field power supply unlocking padlock
Patent Information
- Application Number
- CN202621306617.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-21
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2036-08-21
AI Technical Summary
[0006]通过采用上述技术方案，锁定状态下，锁钩的一端插入锁体内，滚珠部分嵌于锁钩的配合槽内、部分与按钮的侧壁相抵，锁钩被滚珠卡止无法向外弹出；同时阻挡件位于按钮的竖向移动路径上，按钮无法按下，滚珠始终被按钮侧壁顶住无法向弧形槽内移动，锁钩、滚珠、按钮、阻挡件形成全链路机械锁死；当带有NFC功能的手机等设备靠近锁体时，NFC感应组件感应到近场通信信号并产生感应电流，驱动机构由感应电流供电后驱动阻挡件移动，使阻挡件从按钮的竖向移动路径上移开，此时按下按钮，按钮沿竖向向下移动，当按钮侧壁上的弧形槽与配合槽对齐时，滚珠可完全滚入弧形槽内，锁钩的配合槽不再受滚珠限制，锁钩弹簧驱动锁钩向外弹出，锁钩的插入端从锁体中脱离，实现解锁；采用NFC近场供电与人力操作相配合的解锁方式，NFC感应供电仅需驱动阻挡件移动以解除锁止，阻挡件运动行程短、载荷小，所需驱动力远小于直接驱动解锁执行件的力，有效解决了NFC近场供电输出功率有限、无法直接驱动大锁力挂锁的技术难题，使NFC解锁方式能够应用于需要较高锁定力的防盗挂锁；人力通过按压按钮驱动滚珠和锁钩完成解锁动作，承担主要解锁出力，充分利用了人力输出功率大的特点，保证解锁动作可靠有力；NFC电力仅负责“解锁许可”、人力负责“解锁执行”，两者分工明确、配合巧妙，既保留了NFC无钥匙、无电池的便捷优势，又保证了足够的锁定力和防盗性能，大幅提升了NFC解锁挂锁的适用范围和使用可靠性；无传统钥匙孔结构，有效防止技术开启和暴力撬锁，防盗性能好
[0006] By adopting the above technical solution, in the locked state, one end of the lock hook is inserted into the lock body, and the ball is partially embedded in the mating groove of the lock hook and partially abuts against the side wall of the button. The lock hook is blocked by the ball and cannot pop out. At the same time, the blocking component is located on the vertical movement path of the button, so the button cannot be pressed down, and the ball is always pressed against the side wall of the button and cannot move into the arc groove. The lock hook, ball, button, and blocking component form a full-link mechanical lock. When a device such as a mobile phone with NFC function approaches the lock body, the NFC sensing component senses the near-field communication signal and generates an induced current. The drive mechanism is powered by the induced current and drives the blocking component to move, so that the blocking component moves away from the vertical movement path of the button. At this time, the button is pressed, and the button moves vertically downward. When the arc groove on the side wall of the button aligns with the mating groove, the ball can roll completely into the arc groove. The mating groove of the lock hook is no longer restricted by the ball, and the lock hook spring drives the lock hook to pop out. The inserted end of the lock hook disengages from the lock body, realizing unlocking. The unlocking method, which combines electrical and human operation, utilizes NFC inductive power to drive the blocking component to release the lock. The blocking component has a short travel distance and low load, requiring far less driving force than directly driving the unlocking actuator. This effectively solves the technical challenge of limited NFC near-field power output, preventing it from directly driving padlocks with high locking force. This allows NFC unlocking to be applied to anti-theft padlocks requiring high locking force. Human operation, by pressing a button, drives the ball bearings and lock hook to complete the unlocking action, bearing the main unlocking force. This fully utilizes the high power output of human operation, ensuring a reliable and powerful unlocking action. NFC power is only responsible for "unlocking authorization," while human operation is responsible for "unlocking execution." The clear division of labor and ingenious cooperation retain the convenience of NFC's keyless and battery-free features while ensuring sufficient locking force and anti-theft performance, significantly improving the applicability and reliability of NFC unlocking padlocks. The absence of a traditional keyhole structure effectively prevents technical unlocking and forced entry, providing excellent anti-theft performance.
Smart Images
Figure CN224769993U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of padlock technology, specifically to a padlock that uses NFC near-field power supply for unlocking. Background Technology
[0002] Padlocks are a widely used traditional type of lock, typically consisting of a lock body and a hook. One end of the hook is hinged to the lock body, while the other end inserts into the lock body to lock it. They are commonly used for security on doors, lockers, warehouse doors, toolboxes, and many other places. Currently, most padlocks on the market use mechanical keys for unlocking. Inserting the key turns the lock cylinder, actuating the bolt or pin tumbler mechanism inside the lock body to release the hook, thus opening the padlock. Some electronic padlocks use passwords, fingerprints, or Bluetooth unlocking methods, with an electronic module controlling the internal actuator to complete the unlocking action. In recent years, with the popularization of NFC (Near Field Communication) technology, padlocks using NFC near-field power supply have emerged. These padlocks utilize the near-field communication signals from devices such as mobile phones to provide power, eliminating the need for an internal battery and enabling electronic unlocking. This is convenient and avoids problems such as battery leakage and replacement.
[0003] However, the existing padlocks still have the following shortcomings in practical use: Traditional mechanical padlocks rely on keys for unlocking, which are easy to lose and copy, resulting in unsatisfactory security and convenience. Furthermore, their small size limits the lock cylinder structure, making it difficult to improve anti-theft performance. While electronic padlocks improve unlocking convenience, they typically require built-in batteries to power electronic components and actuators. These batteries have limited lifespan and require regular charging or replacement, increasing usage and maintenance costs. Once the battery is depleted, they cannot unlock properly, resulting in low reliability. Existing NFC near-field power-operated padlocks suffer from limited output power from transmitters such as mobile phones, leading to insufficient induced current. With insufficient driving force, directly powering the unlocking actuator with NFC often results in unreliable unlocking, making it suitable only for small padlocks with small hooks and weak locking force, and unable to meet the needs of anti-theft padlocks requiring greater locking force. Increasing the driving force by enlarging the NFC induction coil or adding energy storage capacitors would significantly increase the size and cost of the lock body, and result in slow unlocking response and a poor user experience. How to ensure sufficient locking force and anti-theft performance while reliably unlocking under the limited power of NFC near-field power supply has become a pressing technical challenge in the field of NFC unlocking padlocks. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a padlock that uses NFC near-field power supply for unlocking.
[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a lock body and a lock hook. One end of the lock hook is hinged to the lock body, and the other end can be inserted into the lock body to achieve locking. The lock body is equipped with a button, a ball bearing, and a lock hook spring. The lock hook spring drives the lock hook to pop outwards. The button slides vertically within the lock body. An arc-shaped groove adapted to the ball bearing is provided on the side wall of the button. A mating groove opposite to the arc-shaped groove is provided on the side wall of the lock hook. The ball bearing is located between the arc-shaped groove and the mating groove. When the ball bearing is partially located in the mating groove, the lock hook is fixed to the lock body. The lock body also includes a blocking component, a driving mechanism, and an NFC sensing component. The NFC sensing component is located within the lock body and electrically connected to the driving mechanism. The driving mechanism is connected to the blocking component and drives the blocking component to move within the lock body. The vertical movement paths of the blocking component and the button are opposite.
[0006] By adopting the above technical solution, in the locked state, one end of the lock hook is inserted into the lock body, and the ball is partially embedded in the mating groove of the lock hook and partially abuts against the side wall of the button. The lock hook is blocked by the ball and cannot pop out. At the same time, the blocking component is located on the vertical movement path of the button, so the button cannot be pressed down, and the ball is always pressed against the side wall of the button and cannot move into the arc groove. The lock hook, ball, button, and blocking component form a full-link mechanical lock. When a device such as a mobile phone with NFC function approaches the lock body, the NFC sensing component senses the near-field communication signal and generates an induced current. The drive mechanism is powered by the induced current and drives the blocking component to move, so that the blocking component moves away from the vertical movement path of the button. At this time, the button is pressed, and the button moves vertically downward. When the arc groove on the side wall of the button aligns with the mating groove, the ball can roll completely into the arc groove. The mating groove of the lock hook is no longer restricted by the ball, and the lock hook spring drives the lock hook to pop out. The inserted end of the lock hook disengages from the lock body, realizing unlocking. The unlocking method, which combines electrical and human operation, utilizes NFC inductive power to drive the blocking component to release the lock. The blocking component has a short travel distance and low load, requiring far less driving force than directly driving the unlocking actuator. This effectively solves the technical challenge of limited NFC near-field power output, preventing it from directly driving padlocks with high locking force. This allows NFC unlocking to be applied to anti-theft padlocks requiring high locking force. Human operation, by pressing a button, drives the ball bearings and lock hook to complete the unlocking action, bearing the main unlocking force. This fully utilizes the high power output of human operation, ensuring a reliable and powerful unlocking action. NFC power is only responsible for "unlocking authorization," while human operation is responsible for "unlocking execution." The clear division of labor and ingenious cooperation retain the convenience of NFC's keyless and battery-free features while ensuring sufficient locking force and anti-theft performance, significantly improving the applicability and reliability of NFC unlocking padlocks. The absence of a traditional keyhole structure effectively prevents technical unlocking and forced entry, providing excellent anti-theft performance.
[0007] The present invention is further configured such that: the driving mechanism includes a motor, a gear set and a rotating rod; the motor is electrically connected to the NFC sensing component; the gear set is connected between the output shaft of the motor and the rotating rod and drives the rotating rod to rotate; the rotating rod is provided with a radial protrusion; a blocking member is slidably sleeved on the rotating rod; a helical spring is also sleeved on the rotating rod; the end of the radial protrusion extends into the space between adjacent coils of the helical spring.
[0008] By adopting the above technical solution, the induced current generated by the NFC sensing component drives the motor to rotate. The motor's output shaft, after being reduced in speed and increased in force by a gear set, drives the rotating rod to rotate. The radial protrusion on the rotating rod rotates together with the rotating rod. Since the end of the radial protrusion extends between adjacent coils of the helical spring, the protrusion moves relative to the helical spring along the helical direction during rotation, causing the compression of the helical spring between the protrusion and the blocking component to change. When the rotating rod rotates forward, the protrusion spirals forward along the helical direction, increasing the compression of the helical spring between the protrusion and the blocking component. This increases the axial thrust of the spring on the blocking component, pushing the blocking component laterally along the rotating rod to below the button, entering the locked position. When the rotating rod rotates in the reverse direction, the protrusion spirals backward, and the spring... As the compression decreases, the blocking component moves laterally in the opposite direction along the rotating rod under the spring's restoring force and exits from below the button, entering the unlocked position. The use of a helical spring and a radial protrusion to achieve elastic screw transmission converts the motor's rotational motion into the blocking component's lateral linear movement. This simple and ingenious structure results in low manufacturing costs. The gear set achieves speed reduction and force amplification, allowing the motor to output sufficient thrust to drive the blocking component with a smaller torque, reducing the power requirements of the motor and making it suitable for the limited energy of NFC inductive power supply. The spring transmission provides elastic buffering, absorbing shocks and vibrations and preventing rigid collisions from damaging parts. Simultaneously, the helical spring itself serves both transmission and energy storage functions, eliminating the need for an additional reset elastic component and making the overall structure more compact.
[0009] The present invention is further configured such that: the gear set includes a first gear and a second gear, the motor drives the first gear to rotate, the first gear meshes with the second gear, the second gear is disposed on the rotating rod, and the rotating rod is parallel to the motor.
[0010] By adopting the above technical solution, the motor drives the first gear to rotate, the first gear drives the second gear to rotate through meshing transmission, and the second gear drives the rotating rod to rotate synchronously, realizing the power transmission from the motor to the rotating rod; the rotating rod and the motor are arranged in parallel, so that the drive mechanism is arranged in a flat shape, which is beneficial to the internal space layout of the lock body; the single-stage gear transmission structure is simple, has high transmission efficiency, and low failure rate; the gear ratio between the first gear and the second gear realizes speed reduction and force increase, ensuring that the rotating rod outputs sufficient torque to drive the blocking part to move; the parallel shaft arrangement makes the drive mechanism compact and occupies little space, which is convenient for installation in the limited internal space of the padlock.
[0011] The present invention is further configured such that: a return spring is provided between the button and the lock body, the upper end of the return spring abutting against the button and the lower end abutting against the lock body.
[0012] By adopting the above technical solution, when the button is pressed, the return spring is compressed and stores elastic potential energy. The button moves down, aligning the arc-shaped groove with the mating groove. The ball rolls into the arc-shaped groove, and the lock hook pops out to unlock. After the button is released, the return spring releases its elastic potential energy, pushing the button upward to return it to its initial position. During the upward movement of the button, the inclined surface of the arc-shaped groove pushes the ball outward, causing the ball to partially re-enter the mating groove, preparing for the next locking. When the lock hook is reinserted into the lock body, the mating groove aligns with the ball, and the ball is partially embedded back into the mating groove under the pressure of the button's side wall, completing the automatic locking. The return spring design allows the button to automatically reset after being released, eliminating the need for manual repositioning, making operation simple and quick. It also ensures that the button is always in the pop-up position when no external force is applied, the ball is always pressed into the mating groove, and the lock remains locked, preventing accidental unlocking due to misoperation and ensuring high security. The spring return structure is simple, reliable, and has a long service life.
[0013] The present invention is further configured such that: the blocking member is arranged in a horizontal direction, the driving mechanism drives the blocking member to move in a horizontal direction, and when the blocking member is in the locked position, its end is located below the button and abuts against the lower end surface of the button.
[0014] By adopting the above technical solution, the blocking component moves laterally. When its end moves directly below the button, the upper surface of the blocking component directly abuts against the lower surface of the button. The downward pressing force of the button is fully borne by the blocking component, preventing the button from moving downward and forming a rigid lock. When the blocking component moves laterally out of the area below the button, the lower surface of the button is no longer supported by the blocking component, and the button can move freely downward to unlock. The locking method where the end of the blocking component directly abuts against the lower surface of the button is simple and direct in structure, with a short force transmission path and reliable locking. The pressing force of the button acts directly on the axial direction of the blocking component, resulting in a good force state and strong load-bearing capacity. It can effectively resist external impacts and prying, providing good anti-theft performance. The lateral movement arrangement allows the drive mechanism to be arranged laterally along the lock body, which is beneficial for the utilization of the internal space of the lock body. Attached Figure Description
[0015] 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 the lock body of this utility model, with some parts omitted. Figure 3 This is a schematic diagram of the drive mechanism of this utility model; Figure 4 This is a schematic diagram of the button structure of this utility model.
[0016] In the diagram: 1. Lock body; 2. Lock hook; 21. Mating groove; 3. Button; 31. Arc groove; 4. Ball bearing; 5. Lock hook spring; 6. Blocking component; 7. Drive mechanism; 71. Motor; 72. Gear set; 721. First gear; 722. Second gear; 73. Rotating rod; 731. Radial protrusion; 74. Helical spring; 8. NFC sensing component; 9. Reset spring. Detailed Implementation
[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0019] like Figure 1-4As shown, this utility model discloses an NFC near-field powered unlocking padlock, including a lock body 1 and a hook 2. One end of the hook 2 is hinged to the lock body 1, and the other end can be inserted into the lock body 1 to achieve locking. The lock body 1 is provided with a button 3, a ball 4, and a hook spring 5. The hook spring 5 drives the hook 2 to pop outward. The button 3 is vertically slidable inside the lock body 1. The side wall of the button 3 is provided with an arc-shaped groove 31 adapted to the ball 4. The side wall of the hook 2 is provided with a mating groove 21 opposite to the arc-shaped groove 31. The ball 4 is located between the arc-shaped groove 31 and the mating groove 21. When the ball 4 is partially located in the mating groove 21, the hook 2 is fixed to the lock body 1. The lock body 1 is also provided with a blocking member 6, a driving mechanism 7, and an NFC sensing component 8. The NFC sensing component 8 is provided with... The lock is located inside the lock body 1 and electrically connected to the drive mechanism 7. The drive mechanism 7 is connected to the blocking member 6 and drives the blocking member 6 to move inside the lock body 1. The blocking member 6 is opposite to the vertical movement path of the button 3. In the locked state, one end of the lock hook 2 is inserted into the lock body 1. The ball 4 is partially embedded in the mating groove 21 of the lock hook 2 and partially abuts against the side wall of the button 3. The lock hook 2 is blocked by the ball 4 and cannot pop out. At the same time, the blocking member 6 is located on the vertical movement path of the button 3, so the button 3 cannot be pressed down. The ball 4 is always pressed against the side wall of the button 3 and cannot move into the arc groove 31. The lock hook 2, the ball 4, the button 3, and the blocking member 6 form a full-link mechanical lock. When a device such as a mobile phone with NFC function approaches the lock body 1, the NFC sensing component 8 senses the near field communication signal. This generates an induced current, which powers the drive mechanism 7 to move the blocking member 6, causing it to move away from the vertical movement path of the button 3. When the button 3 is pressed, it moves vertically downwards. When the arc-shaped groove 31 on the side wall of the button 3 aligns with the mating groove 21, the ball 4 can completely roll into the arc-shaped groove 31. The mating groove 21 of the lock hook 2 is no longer restricted by the ball 4, and the lock hook spring 5 drives the lock hook 2 to pop outwards. The insertion end of the lock hook 2 disengages from the lock body 1, achieving unlocking. This unlocking method combines NFC near-field power supply with manual operation. NFC inductive power supply only needs to drive the blocking member 6 to move to release the lock. The blocking member 6 has a short stroke and small load, requiring a driving force far less than that required to directly drive the unlocking actuator, effectively solving the problem of… The technical challenge of limited output power from NFC near-field power supply, preventing it from directly driving padlocks with high locking force, allows NFC unlocking to be applied to anti-theft padlocks requiring high locking force. Human intervention, by pressing button 3, drives the ball bearing 4 and the lock hook 2 to complete the unlocking action, bearing the main unlocking force. This fully utilizes the high power output of human intervention, ensuring a reliable and powerful unlocking action. NFC power is only responsible for "unlocking authorization," while human intervention is responsible for "unlocking execution." This clear division of labor and ingenious cooperation retains the convenience of NFC's keyless and battery-free features while ensuring sufficient locking force and anti-theft performance, significantly improving the applicability and reliability of NFC unlocking padlocks. The absence of a traditional keyhole structure effectively prevents technical unlocking and forced entry, providing excellent anti-theft performance.
[0020] The drive mechanism 7 includes a motor 71, a gear set 72, and a rotating rod 73. The motor 71 is electrically connected to the NFC sensing component 8. The gear set 72 is connected between the output shaft of the motor 71 and the rotating rod 73 and drives the rotating rod 73 to rotate. The rotating rod 73 is provided with a radial protrusion 731. The blocking member 6 is slidably sleeved on the rotating rod 73. A helical spring 74 is also sleeved on the rotating rod 73. The end of the radial protrusion 731 extends between adjacent turns of the helical spring 74. The induced current generated by the NFC sensing component 8 drives the motor 71 to rotate. When the motor 71 is driven, its output shaft, through the gear set 72, reduces speed and increases force, driving the rotating rod 73 to rotate. The radial protrusion 731 on the rotating rod 73 rotates together with the rotating rod 73. Since the end of the radial protrusion 731 extends between adjacent coils of the helical spring 74, the protrusion moves relative to the helical spring 74 along the helical direction during rotation, causing the compression of the helical spring 74 between the protrusion and the blocking member 6 to change. When the rotating rod 73 rotates in the forward direction, the protrusion spirals forward along the helical direction, and the compression of the helical spring 74 between the protrusion and the blocking member 6 changes. As the compression between the coil spring and the radial protrusion 731 increases, the axial thrust of the spring on the blocking member 6 increases, pushing the blocking member 6 to move laterally along the rotating rod 73 to below the button 3 and enter the locked position. When the rotating rod 73 rotates in the opposite direction, the protrusion retracts along the spiral direction, the spring compression decreases, and the blocking member 6 moves laterally in the opposite direction along the rotating rod 73 under the action of the spring's restoring force and exits from below the button 3, entering the unlocked position. The elastic screw drive is achieved by the cooperation of the coil spring 74 and the radial protrusion 731, which converts the rotational motion of the motor 71 into the lateral linear movement of the blocking member 6. The structure is simple and ingenious, and the processing cost is low. The gear set 72 realizes speed reduction and force amplification, enabling the motor 71 to output sufficient thrust to drive the blocking member 6 with a small torque, reducing the power requirements of the motor 71, which is suitable for the limited energy of NFC inductive power supply. The spring drive has an elastic buffering effect, which can absorb shock and vibration and avoid rigid collision damage to parts. At the same time, the coil spring 74 itself has the dual function of transmission and energy storage, eliminating the need for an additional reset elastic element, making the overall structure more compact.
[0021] The gear set 72 includes a first gear 721 and a second gear 722. The motor 71 drives the first gear 721 to rotate, and the first gear 721 meshes with the second gear 722. The second gear 722 is located on the rotating rod 73, which is parallel to the motor 71. The motor 71 drives the first gear 721 to rotate, and the first gear 721 drives the second gear 722 to rotate through meshing transmission. The second gear 722 then drives the rotating rod 73 to rotate synchronously, realizing the power transmission from the motor 71 to the rotating rod 73. The rotating rod 73 and the motor 71 are arranged in parallel, making the drive mechanism 7 as a whole flat and conducive to the internal space layout of the lock body 1. The single-stage gear transmission structure is simple, has high transmission efficiency, and low failure rate. The gear ratio between the first gear 721 and the second gear 722 achieves speed reduction and power amplification, ensuring that the rotating rod 73 outputs sufficient torque to drive the blocking member 6 to move. The parallel shaft arrangement makes the drive mechanism 7 compact and occupies little space, making it easy to install in the limited internal space of the padlock.
[0022] A return spring 9 is provided between button 3 and lock body 1. The upper end of the return spring 9 abuts against button 3, and the lower end abuts against lock body 1. When button 3 is pressed, the return spring 9 is compressed and stores elastic potential energy. Button 3 moves down, aligning the arc groove 31 with the mating groove 21. The ball 4 rolls into the arc groove 31, and the lock hook 2 pops out to unlock. When button 3 is released, the return spring 9 releases its elastic potential energy, pushing button 3 upward to return it to its initial position. During the upward movement of button 3, the inclined surface of the arc groove 31 pushes the ball 4 outward, causing the ball 4 to partially re-enter the mating groove 21, preparing for the next movement. The lock is ready to lock; when the lock hook 2 is reinserted into the lock body 1, the mating groove 21 aligns with the ball 4, and the ball 4 is partially inserted back into the mating groove 21 under the pressure of the side wall of the button 3, completing the automatic locking; the setting of the return spring 9 allows the button 3 to automatically reset after being released, without the need for manual back-pushing, making operation simple and quick; at the same time, it ensures that the button 3 is always in the pop-up position when there is no external force pressing, and the ball 4 is always pressed in the mating groove 21, so that the lock always remains in the locked state, avoiding accidental unlocking due to misoperation, and ensuring high safety; the spring reset structure is simple and reliable, and has a long service life.
[0023] The blocking member 6 is arranged laterally, and the driving mechanism 7 drives the blocking member 6 to move laterally. When the blocking member 6 is in the locked position, its end is located below the button 3 and abuts against the lower end face of the button 3. The blocking member 6 moves laterally, and when its end moves directly below the button 3, the upper end face of the blocking member 6 directly abuts against the lower end face of the button 3. The downward pressing force of the button 3 is fully borne by the blocking member 6, and the button 3 cannot move downward, forming a rigid lock. When the blocking member 6 moves laterally out of the area below the button 3, the lower end face of the button 3 is no longer supported by the blocking member 6, and the button 3 can move downward freely to unlock. The locking method in which the end of the blocking member 6 directly abuts against the lower end face of the button 3 is simple and direct in structure, with a short force transmission path and reliable locking. The pressing force of the button 3 acts directly on the axial direction of the blocking member 6. The blocking member 6 has a good stress state, strong load-bearing capacity, and can effectively resist external impact and prying, with good anti-theft performance. The lateral movement arrangement allows the driving mechanism 7 to be arranged laterally along the lock body 1, which is beneficial to the utilization of the internal space of the lock body 1.
[0024] Working process: In the locked state, the locking hook spring 5 pushes the locking hook 2 upwards, but the ball 4 is partially embedded in the mating groove 21 of the locking hook 2 and partially abuts against the side wall of the button 3. The locking hook 2 is blocked by the ball 4 and cannot pop outwards; at the same time, the end of the blocking member 6 extends laterally into the bottom of the button 3, and the upper end face of the blocking member 6 abuts against the lower end face of the button 3. The button 3 cannot be pressed down, and the ball 4 is always blocked by the side wall of the button 3 and cannot move into the arc groove 31. The locking hook 2, ball 4, button 3, and blocking member 6 form a complete mechanical lock; when N is present When a mobile phone or other device with NFC functionality approaches the lock body 1, the NFC sensing component 8 senses the near-field communication signal and generates an induced current. The motor 71 of the drive mechanism 7 is powered by the induced current and rotates. After being decelerated and amplified by the gear set 72, it drives the rotating rod 73 to rotate. The radial protrusion 731 on the rotating rod 73 retracts along the helical direction of the coil spring 74, reducing the compression of the coil spring 74. Under the action of the spring's restoring force, the blocking part 6 moves laterally along the rotating rod 73 and retracts from below the button 3, clearing the vertical movement path of the button 3. At this time, the button... When button 3 is pressed down, it moves downward against the elastic force of the return spring 9. When the arc groove 31 on the side wall of button 3 aligns with the mating groove 21, the ball 4 can roll completely into the arc groove 31. The mating groove 21 of the lock hook 2 is no longer restricted by the ball 4. The lock hook spring 5 drives the lock hook 2 to pop outward, and the insertion end of the lock hook 2 disengages from the lock body 1, thus unlocking. After unlocking, button 3 is released, the return spring 9 releases its elastic potential energy, and pushes button 3 upward to return to its initial position. During the upward movement of button 3, the inclined surface of the arc groove 31 pushes the ball 4 outward, making... The ball bearing 4 protrudes partially from the side wall of the button 3 again, preparing for the next locking. When locking again, the insertion end of the locking hook 2 is pressed down and inserted into the lock body 1. When the mating groove 21 is aligned with the ball bearing 4, the ball bearing 4 is partially embedded back into the mating groove 21 under the pressure of the side wall of the button 3. After the mobile phone is removed, the sensing current of the NFC sensing component 8 disappears, the motor 71 rotates in the opposite direction, the radial protrusion 731 rotates along the helical spring 74, the compression of the helical spring 74 increases, and the blocking component 6 moves laterally to directly below the button 3, restoring the locked state.
Claims
1. An NFC near-field power supply unlocking padlock, comprising a lock body (1) and a hook (2), one end of the hook (2) being hinged to the lock body (1), and the other end being insertable into the lock body (1) to achieve locking, wherein the lock body (1) is provided with a button (3), a ball (4) and a hook spring (5), the hook spring (5) driving the hook (2) to pop outward, the button (3) being vertically slidably disposed within the lock body (1), the side wall of the button (3) being provided with an arc groove (31) adapted to the ball (4), the side wall of the hook (2) being provided with a mating groove (21) opposite to the arc groove (31), the ball (4) being located between the arc groove (31) and the mating groove (21), wherein when the ball (4) is partially located in the mating groove (21), the hook (2) is fixed to the lock body (1), characterized in that: The lock body (1) is also provided with a blocking component (6), a driving mechanism (7) and an NFC sensing component (8). The NFC sensing component (8) is located inside the lock body (1) and is electrically connected to the driving mechanism (7). The driving mechanism (7) is connected to the blocking component (6) and drives the blocking component (6) to move inside the lock body (1). The vertical movement path of the blocking component (6) is opposite to that of the button (3).
2. The NFC near-field powered unlocking padlock according to claim 1, characterized in that: The drive mechanism (7) includes a motor (71), a gear set (72) and a rotating rod (73). The motor (71) is electrically connected to the NFC sensing component (8). The gear set (72) is connected between the output shaft of the motor (71) and the rotating rod (73) and drives the rotating rod (73) to rotate. A radial protrusion (731) is provided on the rotating rod (73). A blocking member (6) is slidably sleeved on the rotating rod (73). A helical spring (74) is also sleeved on the rotating rod (73). The end of the radial protrusion (731) extends into the adjacent turns of the helical spring (74).
3. A NFC field powered unlocked padlock according to claim 2, characterized in that: The gear set (72) includes a first gear (721) and a second gear (722). The motor (71) drives the first gear (721) to rotate. The first gear (721) meshes with the second gear (722). The second gear (722) is mounted on a rotating rod (73). The rotating rod (73) is parallel to the motor (71).
4. The NFC field powered unlocked padlock of claim 1, wherein: A reset spring (9) is provided between the button (3) and the lock body (1). The upper end of the reset spring (9) abuts against the button (3), and the lower end abuts against the lock body (1).
5. The NFC field powered unlocked padlock of claim 1, wherein: The blocking member (6) is arranged in a transverse direction, and the driving mechanism (7) drives the blocking member (6) to move in a transverse direction. The end of the blocking member (6) is opposite to the lower end face of the button (3).