Passive padlock with knob function

Abstract

The passive padlock with the knob function comprises a lock shell, the lock shell is internally provided with a lock beam and a first transmission mechanism, the lock beam can move in a telescopic mode relative to the lock shell, the first transmission mechanism is in linkage with the lock beam and used for being matched with the lock beam to achieve locking / unlocking of the lock beam, and the lower portion of the first transmission mechanism is in transmission connection with a knob which comprises a knob shaft. A second transmission mechanism is installed in the knob shaft, the lower end of the second transmission mechanism is connected with a motor used for driving the second transmission mechanism to act, and the second transmission mechanism can be driven to act through forward and reverse rotation of the motor so that switching of the clutch state between the knob shaft and the first transmission mechanism can be achieved. When the motor drives the second transmission mechanism to enable the knob shaft to be combined with the first transmission mechanism, the knob can be rotated to drive the first transmission mechanism to act so as to unlock the lock beam. When the motor drives the second transmission mechanism to enable the knob shaft to be separated from the first transmission mechanism, the knob is in an idling state, the knob cannot drive the first transmission mechanism to act by rotating, and therefore unlocking of the lock beam cannot be achieved.

Description

Technical Field

[0001] This invention relates to the field of locks, and more specifically to a passive padlock with a knob function. Background Technology

[0002] Traditional padlocks are mostly purely mechanical structures, and locking and unlocking are usually achieved by directly driving the internal transmission mechanism of the lock body with a key. The unlocking method is simple and cannot meet the needs of automatic control and access management in modern security scenarios.

[0003] To improve ease of use and intelligence, existing technologies have developed electronic padlocks with electric control functions. One type of padlock is equipped with both mechanical and electric key unlocking structures. Although it takes into account both mechanical and electric unlocking methods, it usually requires carrying and using a mechanical key, which is inconvenient to carry and easy to lose, thus failing to truly achieve convenience.

[0004] Another type is the purely electric padlock, where a motor directly drives the lock body's transmission mechanism to complete the locking and unlocking actions. This type of structure requires the motor to have a large torque to drive the lock cylinder, resulting in a complex overall structure and high requirements for motor performance and continuous power supply, thus leading to higher production costs. Furthermore, the motor needs to operate continuously during the locking and unlocking process, resulting in high energy consumption and frequent power supply replacements.

[0005] Therefore, how to overcome the above-mentioned defects and provide a padlock that combines mechanical and electric functions, has a relatively simple structure, and requires little motor power and power supply has become an important issue that needs to be addressed by those skilled in the art. Summary of the Invention

[0006] This invention overcomes the shortcomings of the above-mentioned technologies and provides a passive padlock with a knob function.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A passive padlock with a knob function includes a lock housing, a lock beam that can extend and retract relative to the lock housing, and a first transmission mechanism that works with the lock beam to lock / unlock the lock beam. A knob is driven and connected below the first transmission mechanism. The knob includes a knob shaft, and a second transmission mechanism is installed inside the knob shaft. The lower end of the second transmission mechanism is connected to a motor for driving the second transmission mechanism. By rotating the motor forward and reverse, the second transmission mechanism can be driven to switch between the engagement and disengagement states of the knob shaft and the first transmission mechanism. When the motor drives the second transmission mechanism to engage the knob shaft with the first transmission mechanism, rotating the knob can drive the first transmission mechanism to move, thereby unlocking the lock beam. When the motor drives the second transmission mechanism to disengage the knob shaft from the first transmission mechanism, the knob is in an idle state, and rotating the knob cannot drive the first transmission mechanism to move, thus failing to unlock the lock beam.

[0009] Preferably, the first transmission mechanism includes a first transmission component, and the second transmission mechanism includes a second transmission component. The first transmission component has a first limiting groove, and the knob shaft has a corresponding second limiting groove. The second transmission component includes a protrusion that is assembled in the second limiting groove and can extend into / retract from the first limiting groove. When the motor drives the second transmission mechanism to engage the knob shaft with the first transmission mechanism, the protrusion simultaneously limits and engages between the first limiting groove and the second limiting groove.

[0010] Preferably, the inner wall of the lock beam is symmetrically provided with recesses that cooperate with the first transmission mechanism. The first transmission mechanism further includes a rotating column and spheres symmetrically arranged on the left and right sides of the rotating column that can be partially accommodated in the recesses. The rotating column includes a protrusion for pushing the spheres into the recesses when it rotates. The protrusions are symmetrically arranged front and back. The rotating column also includes a notch for accommodating the spheres after they come out of the recesses. The first transmission member is inserted into the lower end of the rotating column. The first transmission member is circumferentially limited and rotates synchronously with the rotating column.

[0011] Preferably, the rotating column includes an inner boss formed at its upper end, the inner boss has a slot, and a torsion spring is sleeved around the inner boss. One end of the torsion spring is limited and installed in the slot, and the other end is limited and connected to the lock housing. A limiting mechanism for limiting the rotation angle of the rotating column is also provided between the first transmission member and the lock housing. Two sets of the limiting mechanism are symmetrically arranged.

[0012] Preferably, the limiting mechanism includes an arc-shaped groove formed on the outer peripheral sidewall of the first transmission member and a pin with one end inserted into the arc-shaped groove. The other end of the pin is fixed to the lock housing. The arc-shaped groove has a 90-degree fan-shaped structure.

[0013] Preferably, the second transmission mechanism further includes a worm gear connected to the output shaft of the motor, a nut threaded to the upper end of the worm gear, and a double-layer spring sleeved on the outside of the worm gear and the nut. The second transmission component is sleeved around the nut. The double-layer spring includes an outer spring cylinder and an inner spring cylinder folded inside the outer spring cylinder and connected to the outer spring cylinder. One end of the outer spring cylinder is fixedly connected to the second transmission component, one end of the inner spring cylinder is fixedly connected to the nut, and the other end of the outer spring cylinder is connected to the other end of the inner spring cylinder.

[0014] Preferably, a fixing seat is also fitted inside the lock housing, a circuit board assembly is installed in the fixing seat, and a waterproof gasket is used to seal the fixing seat and the lock housing.

[0015] Preferably, the lock housing has a mounting cavity, an NFC antenna board is installed in the mounting cavity, and a sensing plate that covers the NFC antenna board is also installed on the lock housing. The sensing plate is embedded in and closes the mounting cavity and protrudes outward from the lock housing. Both the lock housing and the fixing base have wiring holes.

[0016] Preferably, the bottom of the fixing base is provided with an anti-drilling pin, and the outer wall of the fixing base is provided with an anti-drilling plate. The anti-drilling plate is installed at the mounting position of the circuit board assembly. The contact surface of the anti-drilling plate relative to the fixing base is larger than the contact surface of the circuit board assembly relative to the fixing base facing the anti-drilling plate. The anti-drilling plate is also provided with a wiring hole.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This design, through the coordination of a motor, a first transmission mechanism, a second transmission mechanism, and a knob, significantly improves the anti-theft security of the padlock while adding a manual knob function. Specifically, the motor drives the second transmission mechanism, thereby switching the engagement / disengagement state between the knob shaft and the first transmission mechanism, thus enabling the switching of the linkage relationship between the various mechanisms. When the motor drives the second transmission mechanism to disengage the knob shaft from the first transmission mechanism, that is, when the padlock is in an unauthorized unlocking state, the knob is in a free-spinning state. At this time, it is impossible to directly drive the first transmission mechanism to unlock by rotating the knob. Conversely, the knob can engage with the first transmission mechanism to unlock. This structure of the padlock effectively ensures the safety and anti-theft reliability of the padlock. The motor in this design only starts working briefly when switching between clutch states, without needing to run continuously or directly drive the lock body to complete the locking and unlocking actions. This significantly reduces the requirements for motor torque, performance specifications, and continuous power supply capacity, effectively simplifying the overall transmission structure, reducing production costs and energy consumption, and decreasing the frequency of power supply replacement. It achieves dual functions combining electric control and manual knob operation, while solving the problems of complex structure, high energy consumption, and high requirements for motors and power supplies in existing electric padlocks. The overall structure is simpler and more reliable, with a more compact layout, which is conducive to miniaturizing the overall size of the padlock and making it more economical and convenient to use. Attached Figure Description

[0019] Figure 1 This is an exploded view of the passive padlock in this case.

[0020] Figure 2 This is the case Figure 1 An enlarged schematic diagram showing the hidden part of the structure.

[0021] Figure 3 This is a side view of the passive padlock in this case.

[0022] Figure 4 This is the case Figure 3 A cross-sectional view along the AA direction.

[0023] Figure 5 This is the front view of the passive padlock in this case.

[0024] Figure 6 This is the case Figure 5 A cross-sectional view along the BB direction. Detailed Implementation

[0025] The following examples further illustrate the features and other related characteristics of the present invention in detail, to facilitate understanding by those skilled in the art:

[0026] This case discloses a passive padlock with a knob function. Its core improvement lies in combining manual knob operation with electric clutch control. While adding a manual knob function and improving ease of use, the electric clutch enables the knob to rotate freely to prevent theft, simplifying the structure and reducing the demand for motors and power supplies.

[0027] like Figures 1 to 6As shown, this invention provides a passive padlock with a knob function, including a lock housing 100, within which a lock beam 1, which can extend and retract relative to the lock housing 100, is installed. Specifically, the lock beam 1 is a common U-shaped structure made of high-strength spring steel, with both ends extending and retracting within the lock housing 100 to achieve locking and unlocking of the padlock. A first transmission mechanism 2, linked to the lock beam 1, is also installed within the lock housing 100 to cooperate with the lock beam 1 for locking / unlocking. The first transmission mechanism 2, in cooperation with the lock beam 1, enables locking and unlocking of the lock beam 1, providing a transmission basis for the lock beam 1 and subsequent manual knob operation and electric clutch control. A knob 3 is connected below the first transmission mechanism 2. The knob 3 includes a knob shaft 31 and a knob operating part exposed downwards at the bottom of the lock housing 100. The knob operating part is easy for the user to grip and operate, with anti-slip textured surfaces to improve the grip feel. The knob shaft 31 is integrally formed with the knob 3 or connected and fixed by means of key connection, pin connection, or riveting. In this case, key connection is preferred, taking into account both connection stability and ease of assembly. A second transmission mechanism 4 is installed inside the knob shaft 31, and a motor 5 for driving the second transmission mechanism 4 is connected to the lower end of the second transmission mechanism 4. The forward and reverse rotation of the motor 5 can drive the second transmission mechanism 4 to switch the engagement and disengagement states between the knob shaft 31 and the first transmission mechanism 2. When the motor 5 drives the second transmission mechanism 4 to engage the knob shaft 31 with the first transmission mechanism 2, rotating the knob 3 can drive the first transmission mechanism 2 to move, thereby unlocking the lock beam 1; when the motor 5 drives the second transmission mechanism 4 to disengage the knob shaft 31 from the first transmission mechanism 2, the knob 3 is in an idle state. At this time, rotating the knob 3 can only drive the knob shaft 31 to rotate, and cannot transmit power to the first transmission mechanism 2. Rotating the knob 3 cannot drive the first transmission mechanism 2 to move, thus failing to unlock the lock beam 1. In this case, motor 5 is preferably a miniature DC geared motor, which is small in size, low in power consumption, and has moderate torque. It does not need to have a large power output capacity, but only needs to meet the power requirements for clutch switching, effectively reducing production costs and energy consumption. In this passive padlock structure, the clutch switching control knob 3 of motor 5 is in an idle state through the cooperation of various mechanisms. When motor 5 drives the second transmission mechanism 4 to separate the knob shaft 31 from the first transmission mechanism 2, that is, when the passive padlock is in an unauthorized unlocking state, knob 3 is in an idle state and cannot drive the first transmission mechanism 2, which significantly improves the anti-theft security of the padlock. In addition, motor 5 only undertakes the function of clutch switching and does not need to directly drive the lock beam 1 to complete the locking and unlocking action, which greatly reduces the requirements for the power performance, specifications and continuous power supply capacity of motor 5. This helps to simplify the overall structure, reduce the size of the padlock, and reduce energy consumption, significantly reducing the power demand.

[0028] Specifically, the first transmission mechanism 2 includes a first transmission component 21, and the second transmission mechanism 4 includes a second transmission component 41. The first transmission component 21 is preferably cylindrical and made of metal (such as brass or stainless steel) to provide high strength and wear resistance, allowing it to withstand the forces exerted during transmission for extended periods. The second transmission component 41 is also made of metal, and its structure is adapted to that of the first transmission component 21. A first limiting groove 211 is provided on the first transmission component 21, and a corresponding second limiting groove 311 is provided on the knob shaft 31. The first limiting groove 211 and the second limiting groove 311 are structurally compatible, preferably rectangular grooves. In practice, the edges of the grooves are chamfered to facilitate smooth extension and retraction of the second transmission component 41 and reduce wear. The second transmission component 41 includes a protrusion 411 fitted into the second limiting groove 311 and capable of extending into / retracting from the first limiting groove 211. When the motor 5 drives the second transmission mechanism 4, the second transmission component 41 drives the protrusion 411 to move along the second limiting groove 311. When the protrusion 411 is simultaneously locked between the first limiting groove 211 and the second limiting groove 311, the knob shaft 31 engages with the first transmission mechanism 2. At this time, rotating the knob 3 will drive the first transmission mechanism 2 to move as a whole through the knob shaft 31, the second transmission component 41, and the first transmission component 21. When the protrusion 411 retracts from the first limiting groove 211 into the second limiting groove 311, the knob shaft 31 separates from the first transmission mechanism 2, and the knob 3 spins freely and cannot transmit power. This structure is simple and compact, with precise and reliable clutch switching. It eliminates the need for complex transmission components, further simplifying the overall structure and reducing production and assembly difficulties.

[0029] In specific implementation, the protrusion 411 is integrally formed with the second transmission component 41, and its shape matches the first limiting groove 211 and the second limiting groove 311, ensuring reliable limiting engagement when the protrusion 411 extends in. Furthermore, to ensure the stability of the connection and the reliability of the transmission, in this embodiment, two protrusions 411 are symmetrically arranged, and two sets of the first limiting groove 211 and the second limiting groove 311 are also symmetrically arranged. These two sets of structures are symmetrically distributed on both sides of the first transmission component 21 and the knob shaft 31, ensuring uniform force distribution during transmission and avoiding structural deformation or transmission jamming caused by unilateral force, while also improving the synchronization and stability of clutch switching. In specific implementation, the size of the protrusion 411 is slightly smaller than the size of the first limiting groove 211 and the second limiting groove 311, leaving a small clearance to facilitate the extension and retraction of the protrusion 411, while avoiding transmission wobbling caused by excessive clearance; the end of the protrusion 411 is designed with a rounded transition structure to further reduce frictional resistance during extension and retraction, extending the service life of the component.

[0030] Continue to refer to Figures 1-6As shown, recesses 11 are symmetrically arranged on the inner wall of the locking beam 1 to engage with the first transmission mechanism 2. The first transmission mechanism 2 also includes a rotating column 22 and spheres 23 symmetrically arranged on the left and right sides of the rotating column 22, which can be partially accommodated in the recesses 11. In specific implementation, the recesses 11 are symmetrically arranged on the inner walls of both ends of the U-shaped locking beam 1. The recesses 11 are preferably hemispherical grooves, the shape of which matches the spheres 23 in the first transmission mechanism 2, ensuring that the spheres 23 can be stably inserted into the recesses 11 to lock the locking beam 1. The rotating column 22 includes a protrusion 221 for pushing the spheres 23 into the recesses 11 when it rotates. The protrusions 221 are symmetrically arranged front and back. The rotating column 22 also includes a notch 222 for accommodating the spheres 23 after they are dislodged from the recesses 11. In specific implementation, the diameter of the ball 23 is slightly smaller than the inner diameter of the recess 11, ensuring that the ball 23 can flexibly enter and exit the recess 11, while ensuring stability during locking and preventing accidental loosening of the lock beam 1. The protrusion 221 is symmetrically arranged front and back, with an arc-shaped protrusion structure. The notch 222 is arranged adjacent to the protrusion 221, with an arc-shaped groove structure, the size of which is adapted to the ball 23 and can partially accommodate the ball 23. The symmetrical design of the protrusion 221 and the notch 222 ensures the accurate movement of the ball 23, realizing reliable locking and unlocking actions, without the need for additional components to drive the ball 23, reducing the number of mechanical parts, lowering design complexity and failure rate; the cooperation between the recess 11 and the ball 23 ensures the stability of the lock beam 1 in the locked state, preventing accidental unlocking caused by external forces such as vibration and impact, and improving the security reliability of the padlock. The first transmission component 21 is connected to the lower end of the rotating column 22, and the first transmission component 21 and the rotating column 22 are circumferentially limited and rotate synchronously. The preferred connection method for the two is snap-fit ​​or riveting to ensure the stability of the connection.

[0031] When the padlock is locked, the protrusion 221 of the rotating column 22 presses against the balls 23 on both sides, so that the balls 23 on both sides are respectively accommodated in the corresponding recesses 11. The balls 23 limit the locking beam 1, preventing the locking beam 1 from extending or retracting upward, thereby locking the locking beam 1. When unlocking is required, the motor 5 drives the second transmission mechanism 4 to engage the knob shaft 31 with the first transmission mechanism 2. Rotating the knob 3 drives the first transmission component 21 to rotate, and the first transmission component 21 synchronously drives the rotating column 22 to rotate until the notch 222 of the rotating column 22 rotates to the position corresponding to the balls 23. Under the action of the elastic force of the locking beam 1 itself, the balls 23 dislodge from the recesses 11 and are inserted into the notch 222 of the rotating column 22. At this time, the locking beam 1 loses its limit and pops upward, completing the unlocking action.

[0032] Furthermore, the rotating column 22 includes an inner boss 223 formed at its upper end, which is integrally formed with the rotating column 22. A slot 224 is formed on the inner boss 223, preferably in a rectangular structure. A torsion spring 24 is sleeved around the inner boss 223, with one end of the torsion spring 24 limited and installed in the slot 224 and the other end limited and connected to the lock housing 100. In a specific implementation, a corresponding slot is formed on the lock housing 100 for connecting the other end of the torsion spring 24, so as to limit and fix the torsion spring 24, ensuring that the torsion spring 24 can effectively store force when the rotating column 22 rotates, and can drive the rotating column 22 to reset after unlocking. The torsion spring 24 is used to store force and reset during the process of driving the rotating column 22 to rotate and reset and push the ball 23 into the recess 11 after the ball 23 disengages from the recess 11, or when the lock beam 1 is pressed down again, thereby completing the locking action, improving the convenience of use and the stability of transmission. In specific implementation, the elastic force of the torsion spring 24 is pre-set during padlock assembly, pre-programmed to drive the rotating column 22 to rotate 180 degrees, with 90 degrees of elastic force in a stored state, which is maintained at all times. This ensures that the rotating column 22 can rotate smoothly when unlocking and provides sufficient driving force when resetting, guaranteeing the stability of unlocking and resetting, and avoiding reset failure or insecure locking due to insufficient elastic force. Preferably, a limiting mechanism for limiting the rotation angle of the rotating column 22 is also provided between the first transmission member 21 and the lock housing 100, with two sets of limiting mechanisms symmetrically arranged. The two sets of limiting mechanisms are used to limit the forward and reverse rotation angles of the rotating column 22, respectively, corresponding to the unlocking and locking actions of the padlock, ensuring the accurate rotation angle of the rotating column 22 and avoiding excessive rotation that could damage components or transmission failure.

[0033] Specifically, the limiting mechanism includes an arc-shaped groove 212 formed on the outer peripheral sidewall of the first transmission member 21 and a pin 6 with one end inserted into the arc-shaped groove 212. The other end of the pin 6 is fixed to the lock housing 100, and the arc-shaped groove 212 has a 90-degree fan-shaped structure. This 90-degree fan-shaped structure means that the central angle of the arc-shaped groove 212 is 90 degrees. In this invention, by limiting the pin 6 and the two ends of the arc-shaped groove 212, the rotation angle of the rotating column 22 can be limited to 90 degrees, thereby limiting the rotation angle of the first transmission member 21 and the knob 3, ensuring that the rotating column 22 can stop in time after rotating to the correct position, and avoiding excessive rotation that could damage the torsion spring 24, cause the ball 23 to jam, or cause the transmission mechanism to fail.

[0034] In this case, choosing a 90-degree unlocking angle has significant advantages over other rotation angles such as 45 degrees, 60 degrees, 120 degrees, or 180 degrees: Compared to 45 degrees and 60 degrees, a 90-degree rotation angle provides sufficient rotation range to ensure that the locking mechanism (ball 23 and recess 11) can be fully unlocked, while maintaining the compactness of the overall structure and avoiding mechanical complexity due to an excessively small angle; although unlocking angles of 45 degrees or 60 degrees can reduce rotation time, they may not be sufficient to ensure the full release of the locking mechanism, especially in applications requiring a large operating space, which can easily lead to incomplete unlocking. Furthermore, smaller angles increase the torque requirements of the motor, increasing design difficulty, and requiring higher manufacturing and assembly precision, thus increasing production and maintenance costs and affecting long-term reliability.

[0035] Compared to 120 degrees and 180 degrees, a 90-degree rotation angle reduces energy consumption and wear on the internal mechanical transmission, effectively extending component lifespan, especially under frequent padlock use. Larger rotation angles cause the motor 5 and transmission mechanism to bear greater stress, increasing wear and the risk of failure. Furthermore, longer rotation times increase user waiting time, reducing the user experience and hindering rapid response to unlocking requests in emergencies. In addition, unlocking is completed with a simple 90-degree rotation of the knob 3, offering convenient and quick operation while effectively preventing wire entanglement inside the lock housing 100, avoiding circuit failures caused by wire wear, and further enhancing the padlock's reliability.

[0036] Furthermore, the second transmission mechanism 4 also includes a worm gear 42 connected to the output shaft of the motor 5, a nut 43 threaded to the upper end of the worm gear 42, and a double-layer spring 44 sleeved on the outside of the worm gear 42 and the nut 43, wherein the second transmission member 41 is sleeved around the nut 43. The double-layer spring 44 includes an outer spring sleeve 441 and an inner spring sleeve 442 folded inside the outer spring sleeve 441 and connected to the outer spring sleeve 441. One end of the outer spring sleeve 441 is fixedly connected to the second transmission member 41, one end of the inner spring sleeve 442 is fixedly connected to the nut 43, and the other end of the outer spring sleeve 441 is connected to the other end of the inner spring sleeve 442. When motor 5 rotates forward, it drives worm gear 42 to rotate forward. Worm gear 42 drives nut 43 to move toward the first transmission member 21 through threaded transmission. At this time, inner spring cylinder 442 is stretched, and outer spring cylinder 441 is subjected to the force of nut 43, pushing second transmission member 41 to move forward. Second transmission member 41 drives protrusion 411 to extend into first limiting groove 211, realizing the engagement of knob shaft 31 with first transmission mechanism 2. When motor 5 rotates in reverse, it drives worm gear 42 to rotate in reverse. Worm gear 42 drives nut 43 to move away from first transmission member 21. At this time, inner spring cylinder 442 is compressed, and outer spring cylinder 441 pulls second transmission member 41 to move backward. Second transmission member 41 drives protrusion 411 to retract from first limiting groove 211, realizing the separation of knob shaft 31 from first transmission mechanism 2. The double-layer spring 44 in this case can effectively buffer the impact force when the nut 43 moves, making the movement of the second transmission component 41 more stable, avoiding rigid collision between the protrusion 411 and the first limiting groove 211 and the second limiting groove 311, reducing component wear and extending service life; at the same time, the double-layer spring 44 can provide stable elastic force to ensure that the protrusion 411 can be tightly engaged between the first limiting groove 211 and the second limiting groove 311 when it is inserted, making clutch switching more reliable and avoiding transmission loosening.

[0037] Furthermore, a fixing seat 7 is also fitted inside the lock housing 100, and a circuit board assembly 8 is installed in the fixing seat 7. A waterproof gasket is used to seal the fixing seat 7 and the lock housing 100. In specific implementation, the function of the fixing seat 7 is to install and fix the lock beam 1, the first transmission mechanism 2, the second transmission mechanism 4, the motor 5, the knob shaft 31, and other mechanisms or components, providing a stable installation reference for each mechanism or component. The fixing seat 7 is provided with grooves and cavities for the installation and embedding of each mechanism or component, which can limit the movement of each mechanism and component, provide installation support, or provide movement space, ensuring that each component will not be displaced or loosened during operation, enhancing the overall stability and reliability of the padlock, and reducing the risk of failure due to vibration or impact. In specific implementation, the circuit board assembly 8 is electrically connected to the motor 5. The specific principle and structure of the circuit board assembly 8 can be referred to by those skilled in the art for implementation of the circuit board assembly 8 used in passive padlocks in the prior art, which is not the focus of protection in this case, so it will not be described in detail. In specific implementation, the waterproof gasket is preferably made of silicone material with good sealing and elasticity. The waterproof gasket fits tightly against the contact surface between the mounting base 7 and the lock housing 100, effectively preventing moisture, dust, and other impurities from entering the lock housing 100. This protects the internal circuitry (circuit board assembly 8) and mechanical components from corrosion and short-circuit risks, extending the lifespan of the padlock and making it suitable for use in humid outdoor environments. In practice, the waterproof gasket can be sealed using adhesive bonding or an interference fit. Adhesive bonding ensures a tighter seal and prevents it from easily falling off; an interference fit facilitates assembly and disassembly. Users can choose the method that best suits their production needs.

[0038] Reference Figure 1As shown, a mounting cavity 101 is provided on the lock housing 100, and an NFC antenna board 9 is installed inside the mounting cavity 101. In specific implementation, the NFC antenna board 9 is electrically connected to the circuit board assembly 8 to receive sensing signals sent by NFC devices. It also powers the passive padlock in this case through an external NFC device, such as a mobile phone, and transmits corresponding unlocking and locking signals from the mobile phone to the circuit board assembly 8. The circuit board assembly 8 then controls the motor 5 to switch between clutch and engagement. A sensing plate 102, which covers the NFC antenna board 9, is also installed on the lock housing 100. The sensing plate 102 is embedded in and closes the mounting cavity 101 and protrudes outward from the lock housing 100. Wiring holes 200 are provided on both the lock housing 100 and the mounting base 7. The wiring holes 200 are used for wire connections between the circuit board assembly 8 and components such as the NFC antenna board 9 and the motor 5. In practical implementation, taking a mobile phone as an example, the user opens the mobile app and attaches the phone to the sensing plate. After NFC reverse power supply, the user taps the unlock button on the phone to input the unlock signal. The motor 5 rotates forward, driving the second transmission component 41 to move upward and engage with the first transmission component 21. At this time, rotating the knob 90° unlocks the door. When the user taps the lock button on the phone to input the lock signal, the motor 5 reverses, and the second transmission component 41 moves downward and disengages from the first transmission component 21. At this time, the knob rotates freely. Preferably, an NFC sensing mark is provided on the surface of the sensing plate 102 to facilitate the user to quickly find the sensing location.

[0039] Continue to refer to Figure 1 As shown, to enhance the overall anti-theft performance of the passive padlock in this case, an anti-drilling pin 71 is installed at the bottom of the mounting base 7, and an anti-drilling plate 72 is installed on the outer wall of the mounting base 7. In practice, four anti-drilling pins 71 are arranged side-by-side, evenly distributed at the bottom of the mounting base 7, fully covering the bottom area of ​​the mounting base 7 to prevent criminals from drilling holes from the bottom of the mounting base 7 and damaging core components such as the internal circuit board assembly 8 and motor 5. The anti-drilling plate 72 is installed at the mounting position of the circuit board assembly 8. The anti-drilling plate 72 effectively protects the circuit board assembly 8 and the wires connecting the circuit board assembly 8 to the NFC antenna board 9, preventing criminals from damaging the circuit board assembly 8 by drilling holes from the side, thus preventing the padlock from malfunctioning. The contact surface of the anti-drilling plate 72 relative to the mounting base 7 is larger than the contact surface of the circuit board assembly 8 relative to the mounting base 7 on the side facing the anti-drilling plate 72, ensuring that the anti-drilling plate 72 fully covers the mounting area of ​​the circuit board assembly 8, forming comprehensive protection and avoiding blind spots. A wiring hole 200 is also provided on the anti-drill plate 72. The wiring hole 200 corresponds to the wiring hole 200 on the fixing base 7 and the lock shell 100, so that the wire can pass through.

[0040] As stated above, this case protects a passive padlock with a knob function, and all technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.

Claims

1. A passive padlock with a knob function, comprising a lock housing (100), wherein a lock beam (1) retractable relative to the lock housing (100) is installed inside the lock housing (100), and a first transmission mechanism (2) linked to the lock beam (1) for cooperating with the lock beam (1) to lock / unlock the lock beam (1), characterized in that: A knob (3) is connected to the lower part of the first transmission mechanism (2). The knob (3) includes a knob shaft (31). A second transmission mechanism (4) is installed inside the knob shaft (31). The lower end of the second transmission mechanism (4) is connected to a motor (5) for driving the second transmission mechanism (4). The second transmission mechanism (4) can be driven to move by the forward and reverse rotation of the motor (5), thereby switching the engagement and disengagement states between the knob shaft (31) and the first transmission mechanism (2). When the motor (5) drives the second transmission mechanism (4) to engage the knob shaft (31) with the first transmission mechanism (2), rotating the knob (3) can drive the first transmission mechanism (2) to move, thereby unlocking the lock beam (1). When the motor (5) drives the second transmission mechanism (4) to disengage the knob shaft (31) from the first transmission mechanism (2), the knob (3) is in an idle state. Rotating the knob (3) cannot drive the first transmission mechanism (2) to move, thereby failing to unlock the lock beam (1).

2. A passive padlock with a knob function according to claim 1, characterized in that: The first transmission mechanism (2) includes a first transmission component (21), and the second transmission mechanism (4) includes a second transmission component (41). The first transmission component (21) is provided with a first limiting groove (211), and the knob shaft (31) is provided with a corresponding second limiting groove (311). The second transmission component (41) includes a protrusion (411) assembled in the second limiting groove (311) and capable of extending into / retracting from the first limiting groove (211). When the motor (5) drives the second transmission mechanism (4) to engage the knob shaft (31) with the first transmission mechanism (2), the protrusion (411) simultaneously limits and engages between the first limiting groove (211) and the second limiting groove (311).

3. A passive padlock with a knob function according to claim 2, characterized in that: The inner wall of the lock beam (1) is symmetrically provided with recesses (11) that are in transmission cooperation with the first transmission mechanism (2). The first transmission mechanism (2) also includes a rotating column (22) and spheres (23) symmetrically arranged on the left and right sides of the rotating column (22) that can be partially accommodated in the recesses (11). The rotating column (22) includes a protrusion (221) for pushing the sphere (23) into the recesses (11) when it rotates. The protrusion (221) is symmetrically arranged front and back. The rotating column (22) also includes a notch (222) for accommodating the sphere (23) after it comes out of the recesses (11). The first transmission member (21) is connected to the lower end of the rotating column (22). The first transmission member (21) and the rotating column (22) are circumferentially limited and rotate synchronously.

4. A passive padlock with a knob function according to claim 3, characterized in that: The rotating column (22) includes an inner boss (223) formed at its upper end. A slot (224) is provided on the inner boss (223). A torsion spring (24) is sleeved around the inner boss (223). One end of the torsion spring (24) is limited and installed in the slot (224), and the other end is limited and connected in the lock shell (100). A limiting mechanism for limiting the rotation angle of the rotating column (22) is also provided between the first transmission member (21) and the lock shell (100). Two sets of the limiting mechanism are symmetrically arranged.

5. A passive padlock with a knob function according to claim 4, characterized in that: The limiting mechanism includes an arc-shaped groove (212) opened on the outer peripheral side wall of the first transmission member (21) and a pin (6) with one end inserted in the arc-shaped groove (212). The other end of the pin (6) is fixed on the lock housing (100). The arc-shaped groove (212) has a 90-degree fan-shaped structure.

6. A passive padlock with a knob function according to claim 5, characterized in that: The second transmission mechanism (4) further includes a worm (42) connected to the output shaft of the motor (5), a nut (43) threaded to the upper end of the worm (42), and a double-layer spring (44) sleeved on the outside of the worm (42) and the nut (43). The second transmission component (41) is sleeved on the periphery of the nut (43). The double-layer spring (44) includes an outer spring cylinder (441) and an inner spring cylinder (442) folded inside the outer spring cylinder (441) and connected to the outer spring cylinder (441). One end of the outer spring cylinder (441) is fixedly connected to the second transmission component (41), one end of the inner spring cylinder (442) is fixedly connected to the nut (43), and the other end of the outer spring cylinder (441) is connected to the other end of the inner spring cylinder (442).

7. A passive padlock with a knob function according to any one of claims 1-6, characterized in that: A fixing seat (7) is also fitted inside the lock housing (100), and a circuit board assembly (8) is installed in the fixing seat (7). A waterproof gasket is sealed between the fixing seat (7) and the lock housing (100).

8. A passive padlock with a knob function according to claim 7, characterized in that: The lock housing (100) has an installation cavity (101) and an NFC antenna board (9) is installed in the installation cavity (101). The lock housing (100) also has a sensor board (102) that covers the NFC antenna board (9). The sensor board (102) is embedded in and closes the installation cavity (101) and protrudes outward from the lock housing (100). Both the lock housing (100) and the fixing base (7) have wiring holes (200).

9. A passive padlock with a knob function according to claim 8, characterized in that: The bottom of the fixing base (7) is provided with an anti-drilling pin (71), and an anti-drilling plate (72) is installed on the outer wall of the fixing base (7). The anti-drilling plate (72) is installed at the mounting position of the circuit board assembly (8). The contact surface of the anti-drilling plate (72) relative to the fixing base (7) is larger than the contact surface of the circuit board assembly (8) relative to the fixing base (7) facing the anti-drilling plate (72). A wiring hole (200) is also provided on the anti-drilling plate (72).

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