A stall mechanism and a passive lock

Abstract

This application discloses a stall mechanism and a passive lock. The stall mechanism includes a stall driver, a stall drive shaft, a stall clutch shaft, a stall structure, and a stall elastic element. The stall drive shaft is connected to the rotating shaft of the stall driver, which drives the stall drive shaft to rotate forward. The stall clutch shaft is sleeved on the outside of the stall drive shaft, and at least two recessed stall avoidance areas are provided at circumferential intervals on the outer peripheral sidewall of the stall clutch shaft. The stall structure is reciprocating and can move to a position where it engages with the stall avoidance areas or move in the opposite direction to a position where it is disengaged from the stall avoidance areas. The stall elastic element is disposed on the stall drive shaft, which can push the stall clutch shaft to rotate forward through the stall elastic element, and the stall elastic element can further push the stall clutch shaft to rotate forward. This application can be widely applied in the field of Internet of Things (IoT) smart terminal technology.

Description

Technical Field

[0001] This application relates to the field of Internet of Things (IoT) smart terminal technology, and in particular to a stall mechanism and a passive lock. Background Technology

[0002] Power transmission and communication cables are laid through underground conduits, with underground manholes providing access for cable installation and maintenance. Manhole covers and locks are typically installed at the entrances of these manholes to ensure the safety of advanced equipment within the manholes and conduits. To protect this equipment, manhole locks are usually designed with a locking clutch assembly, driven by a motor to achieve locking and unlocking. However, the complex transmission structure of the locking clutch assembly results in high power consumption and energy consumption when the motor is driven. Furthermore, the motor needs to be started twice during locking and unlocking—once for unlocking and once for locking—leading to high energy consumption and potential damage from frequent starts. Summary of the Invention

[0003] To solve at least one of the above-mentioned technical problems, this application provides a stall mechanism and a passive lock, and the technical solution adopted is as follows.

[0004] The stall mechanism provided in this application includes a stall actuator, a stall drive shaft, a stall clutch shaft, a stall structure, and a stall elastic element. The stall actuator has a rotating shaft at its output end. The stall drive shaft is connected to the rotating shaft of the stall actuator, and the stall actuator drives the stall drive shaft to rotate forward by a set angle, which includes a first stroke and an energy storage stroke. The stall clutch shaft is sleeved on the outside of the stall drive shaft, and its outer peripheral sidewall is provided with at least two recessed stall avoidance areas spaced circumferentially. The stall clutch shaft can rotate forward by a set angle, which includes an avoidance stroke and a second stroke. The stall structure is reciprocating and can move to a position engaging with the stall avoidance areas or move in the opposite direction to a position releasing from the stall avoidance areas. The stall elastic element is provided with... The stall drive shaft is positioned such that the stall elastic element acts on both the stall drive shaft and the stall clutch shaft. The stall drive shaft can be driven to rotate forward by the stall elastic element. When the stall drive shaft completes the first stroke, the stall clutch shaft completes the clearance stroke. At this time, the stall clearance area rotates to a set position M, and the stall structure moves to a position where it engages with one of the stall clearance areas, so that the stall clutch shaft is in a locked, non-rotating state. When the stall drive shaft continues to rotate forward and completes the energy storage stroke, the stall elastic element completes compression and energy storage. The elastic force of the stall elastic element can drive the stall clutch shaft to complete the second stroke, so that the stall clearance area rotates to a set position N. At this time, the stall clearance area moves to a position misaligned with the stall structure, and the stall structure is released from engagement with the stall clearance area.

[0005] In some embodiments of this application, a transmission limiting structure is provided between the stalled drive shaft and the stalled clutch shaft. The transmission limiting structure includes a transmission protrusion and a transmission recess. One of the transmission protrusion and the transmission recess is disposed on the outer peripheral sidewall of the stalled drive shaft, and the other is disposed on the inner peripheral sidewall of the stalled clutch shaft. In the forward circumferential direction of rotation, the width of the transmission recess is greater than the width of the transmission protrusion. In the forward circumferential direction of rotation, when the front sidewall of the transmission recess abuts against the front sidewall of the transmission protrusion, the energy storage stroke is completed; when the rear sidewall of the transmission recess abuts against the rear sidewall of the transmission protrusion, the second stroke is completed.

[0006] In some embodiments of this application, the stall mechanism includes a stall bracket, the stall driver and the stall clutch shaft are disposed on the stall bracket, the side wall of the stall bracket is provided with an inner channel, the stall structure is disposed in the inner channel, the two ends of the inner channel extend to form ports, when the stall avoidance area rotates to the set position M, one of the stall avoidance areas corresponds to the port at the first end of the inner channel, when the stall avoidance area rotates to the set position N, the outer peripheral side wall of the stall clutch shaft seals the port at the first end of the inner channel.

[0007] In some embodiments of this application, the stall structure is configured as a spherical structure or as a cylindrical structure with a spherical end face.

[0008] In some embodiments of this application, the stall avoidance zone is configured as a spherical concave hole.

[0009] In some embodiments of this application, the stall elastic element is configured as a torsional elastic element.

[0010] In some embodiments of this application, when the stall drive shaft completes the first stroke, the stall clutch shaft rotates by a set angle A, and when the stall clutch shaft completes the second stroke, the stall clutch shaft rotates by a set angle B; on the outer peripheral sidewall of the stall clutch shaft, the included angle formed by the center positions of two adjacent stall avoidance zones on the circumference is C, satisfying: C=A+B.

[0011] In some embodiments of this application, the stall avoidance zones are evenly distributed on the outer peripheral sidewall of the stall clutch shaft.

[0012] The passive lock provided in this application includes a lock cylinder mechanism, a stall mechanism, and an NFC component. The NFC component is electrically connected to the stall driver. The user connects to the NFC component using an NFC unlocker to achieve power supply and signal transmission. When the stall mechanism moves to a position where it engages with one of the stall avoidance zones, the lock cylinder mechanism can move, and the passive lock is unlocked. When the stall avoidance zone is misaligned with the stall mechanism and the stall mechanism moves to a position where it is disengaged from the stall avoidance zone, the lock cylinder mechanism is fixed and does not move, and the passive lock is locked.

[0013] In some embodiments of this application, the lock cylinder mechanism includes a locking clutch assembly connected to the lock cylinder mechanism; when the stall avoidance area is misaligned with the stall structure and the stall structure moves to a position where it is disengaged from the stall avoidance area, the stall structure engages with the locking clutch assembly to fix the lock cylinder mechanism, at which point the passive lock is locked; when the stall structure moves to a position where it engages with one of the stall avoidance areas, the stall structure disengages from the locking clutch assembly, at which point the locking clutch assembly releases its fixation on the lock cylinder mechanism, and the passive lock is unlocked.

[0014] The embodiments of this application have at least the following beneficial effects: The passive lock design uses an NFC connection to obtain power for the stall mechanism. In the stall mechanism, under the drive of the stall driver, the stall drive shaft rotates the stall clutch shaft by a set angle, which allows the stall structure to engage with the stall clutch shaft, thereby releasing the stall structure from the lock cylinder mechanism. The passive lock can then unlock. The compressed, energy-storing stall elastic element pushes the stall clutch shaft to continue rotating by a set angle, thus releasing the stall structure from the stall clutch shaft. This application can be widely applied in the field of IoT smart terminal technology. Attached Figure Description

[0015] The aspects and advantages described and / or added to the embodiments of this application will become apparent and readily understood in conjunction with the following drawings. It should be noted that the embodiments illustrated in the following drawings are exemplary and are used only to explain this application, and should not be construed as limiting this application.

[0016] Figure 1-1 This is a structural diagram of the stall mechanism.

[0017] Figure 1-2 This is a cross-sectional view of the stall mechanism.

[0018] Figure 1-3 This is a structural diagram of the stall mechanism after the stall support has been removed.

[0019] Figure 2-1 This is a structural diagram of the stalled clutch shaft and the stalled drive shaft.

[0020] Figure 2-2 This is a structural diagram of the stall clutch shaft.

[0021] Figure 2-3 This is a structural diagram of a stalled drive shaft.

[0022] Figure 3-1 This is a structural diagram of the locking mechanism, the stall mechanism, and the NFC component in a passive lock.

[0023] Figure 3-2 This is a structural diagram of the locking mechanism and the stall mechanism.

[0024] Figure 4-1 This is a structural diagram of the lock cylinder mechanism.

[0025] Figure 4-2 This is a longitudinal sectional view of the lock cylinder mechanism.

[0026] Figure 4-3 This is a cross-sectional view of the lock cylinder mechanism.

[0027] Figure 4-4 This is a structural diagram of the lock cylinder shaft, locking linkage structure, and locking clutch assembly.

[0028] Figure 5-1 This is a structural diagram of the lock cylinder shaft.

[0029] Figure 5-2 This is a structural diagram of the first clutch shaft.

[0030] Figure 5-3 This is a structural diagram of the second clutch shaft.

[0031] Figure 5-4 This is a structural diagram of the third clutch shaft.

[0032] Figure 5-5 This is a structural diagram of the locking linkage structure.

[0033] Figure 6-1 This diagram shows the state of the lock cylinder shaft, the second clutch shaft, the third clutch shaft, and the first locking structure when locked. The diagram shows that the first locking structure is in the first engaging position, the second clutch shaft is in the second locking position, and the third clutch shaft is in the third locking position.

[0034] Figure 6-2 The diagram shows the state of the lock cylinder shaft, the second clutch shaft, the third clutch shaft, and the first locking structure during unlocking. The diagram shows the first locking structure in the first clearance position, the second clutch shaft in the second unlock position, and the third clutch shaft in the third unlock position.

[0035] Reference numerals: 1000, Lock cylinder mechanism; 1100, Lock cylinder shaft; 1101, First through hole; 1102, First slide groove; 1103, Lock cylinder cover; 1200, First locking structure; 1300, Lock tongue; 2100, First clutch shaft; 2101, First actuating part; 2102, Rotary pushing structure; 2103, Recessed area; 2104, First locking area; 2105, Stopping plane; 2200, Second clutch shaft; 2201, Second sliding part; 2202, Second clearance area; 2300, Third clutch shaft; 2301, Third locking area; 2302. Third sliding part; 2401, first elastic element; 2402, second elastic element; 2403, third elastic element; 3000, locking linkage structure; 3100, first clearance area; 3200, second slide groove; 4000, stall mechanism; 4100, stall driver; 4200, stall transmission shaft; 4300, stall clutch shaft; 4301, stall clearance area; 4302, hooking area; 4400, stall elastic element; 4501, transmission protrusion; 4502, transmission recess; 4600, stall bracket; 4700, stall structure; 5000, NFC component. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-1 To be continued Figure 6-2 The embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0037] In the description of this application, it should be understood that the use of terms such as "center," "middle," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings is solely for the convenience of describing this application and simplifying the description, and does 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 application. Features defined with "first" and "second" are used to distinguish feature names and do not have special meanings. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] This application relates to a passive lock used for locking manhole covers. The passive lock includes a lock cylinder mechanism 1000, which is used to unlock or lock the passive lock. Furthermore, the lock cylinder mechanism 1000 in the passive lock is disengageable. The passive lock includes a stall mechanism 4000, which, in conjunction with the disengagement of the lock cylinder mechanism 1000, enables the unlocking or locking of the passive lock.

[0040] Furthermore, the lock cylinder mechanism 1000 includes a locking clutch assembly connected to the lock cylinder mechanism 1000. The locking clutch assembly can switch the lock cylinder mechanism 1000 to a movable or immovable state for passive locking or unlocking. The stall mechanism 4000 fixes the locking clutch assembly in place through a snap-fit ​​connection, thus fixing the lock cylinder mechanism 1000 in place.

[0041] Understandably, the passive lock also includes a lock housing, a lock cylinder mechanism 1000 is located in the lock housing, and the manhole cover is equipped with a locking pin. The lock cylinder mechanism 1000 engages with the locking pin to lock the manhole cover.

[0042] Other components and operations of the passive lock have been described in the relevant technology for those skilled in the art, and will not be described in detail here. The structure of the stall mechanism 4000 will be introduced below.

[0043] This application relates to a stall mechanism 4000. Referring to the accompanying drawings, the stall mechanism 4000 includes a stall driver 4100 and a stall drive shaft 4200. The stall driver 4100 includes a motor, and its output end has a rotating shaft. The stall drive shaft 4200 is connected to the rotating shaft of the stall driver 4100, and the stall driver 4100 drives the stall drive shaft 4200 to rotate in the forward direction. The stall drive shaft 4200 is integrally formed with or snap-fitted to the rotating shaft of the stall driver 4100.

[0044] It should be noted that, under the drive of the stall drive 4100, the stall drive shaft 4200 rotates in either a clockwise or counterclockwise direction. Forward rotation does not refer to a specific direction, but rather to the direction in which the stall drive shaft 4200 rotates. Once the direction of rotation of the stall drive shaft 4200 is determined, it is considered the forward rotation direction.

[0045] Referring to the accompanying drawings, the stall mechanism 4000 includes a stall clutch shaft 4300, which is cylindrical in shape and sleeved on the outside of the stall drive shaft 4200. Further, the outer peripheral sidewall of the stall clutch shaft 4300 is provided with at least two recessed stall avoidance areas 4301 spaced circumferentially. The stall drive shaft 4200 can drive the stall clutch shaft 4300 to rotate forward, thereby changing the position of the stall avoidance areas 4301. It is understood that the diameter of the circumference of the sidewall formed by the stall avoidance areas 4301 along the circumference surrounding the central axis of the stall clutch shaft 4300 is smaller than the diameter of the circumference of the outer sidewall of the stall clutch shaft 4300.

[0046] The stall mechanism 4000 includes a stall elastic element 4400, which is disposed on the stall drive shaft 4200 and acts on both the stall drive shaft 4200 and the stall clutch shaft 4300. The stall drive shaft 4200 can drive the stall clutch shaft 4300 to rotate forward through the stall elastic element 4400, and the elastic force of the stall elastic element 4400 itself can also drive the stall clutch shaft 4300 to rotate forward. It can be understood that the stall clutch shaft 4300 achieves forward rotation in two ways: one is that when the stall actuator 4100 drives the stall drive shaft 4200 to rotate forward, the stall drive shaft 4200 drives the stall clutch shaft 4300 to rotate forward through the stall elastic element 4400; the other is that the stall drive shaft 4200 does not rotate, but the elastic force of the stall elastic element 4400 drives the stall clutch shaft 4300 to rotate forward.

[0047] The stall drive shaft 4200 can rotate forward by a set angle, and this set angle includes a first stroke and an energy storage stroke. Specifically, the stall drive shaft 4200 first completes the first stroke and then completes the energy storage stroke. The stall clutch shaft 4300 can rotate forward by a set angle, and this set angle includes a clearance stroke and a second stroke. Specifically, the stall clutch shaft 4300 first completes the clearance stroke and then completes the second stroke.

[0048] It should be noted that, driven by the stall actuator 4100, the stall drive shaft 4200 rotates forward to complete the first stroke, and the stall drive shaft 4200 pushes the stall clutch shaft 4300 to rotate forward through the stall elastic element 4400, so that the stall clutch shaft 4300 performs a clearance stroke. When the stall clearance area 4301 rotates to the set position M, the stall clutch shaft 4300 completes the clearance stroke, at which point the stall clutch shaft 4300 is in a locked and non-rotating state. Driven by the stall actuator 4100, the stall drive shaft 4200 continues to rotate forward and performs an energy storage stroke. The stall elastic element 4400 is compressed. When the stall drive shaft 4200 completes energy storage, the stall elastic element 4400 completes compression energy storage. Subsequently, the elastic force of the stall elastic element 4400 can push the stall clutch shaft 4300 to disengage the stall clutch shaft 4300. Under the push of the elastic force of the stall elastic element 4400, the stall clutch shaft 4300 rotates in the forward direction and completes the second stroke, so that the stall avoidance area 4301 rotates to the set position N.

[0049] Furthermore, the locking mechanism 4000 includes a locking structure 4700, which engages the lock cylinder mechanism 1000 to fix the lock cylinder mechanism 1000 in a fixed position. The locking structure 4700 is reciprocating and can move back and forth between the locking clutch shaft 4300 and the locking clutch assembly to engage or disengage the lock cylinder mechanism 1000. Specifically, the locking structure 4700 can move to a position where it engages with the locking clearance area 4301, at which point the locking structure 4700 separates from the locking clutch assembly and disengages; or, the locking structure 4700 can move in the opposite direction to a position where it disengages from the locking clearance area 4301, at which point the locking structure 4700 engages with the locking clutch assembly to fix the locking clutch assembly in a fixed position. Understandably, the movement of the stall structure 4700, in conjunction with the rotation of the stall clutch shaft 4300, enables the stall structure 4700 to engage or disengage with the locking clutch assembly, thereby achieving the locking or unlocking of the passive lock.

[0050] Between the stall clutch shaft 4300 and the locking clutch assembly, the stall structure 4700 can move to a first position or in the opposite direction to a second position. Specifically, from the second position to the first position, the stall structure 4700 moves toward the stall clutch shaft 4300. When the stall structure 4700 moves to the first position, the stall structure 4700 disengages from the locking clutch assembly, and the stall structure 4700 partially enters the stall clearance area 4301. The stall structure 4700 engages with the stall clearance area 4301 to achieve engagement between the stall structure 4700 and the stall clutch shaft 4300. Under the abutment of the outer wall of the locking clutch assembly, the stall structure 4700 maintains engagement with the stall clearance area 4301. From the first position to the second position, the stall structure 4700 moves toward the locking clutch assembly. When the outer wall of the locking clutch assembly releases its abutment against the stall structure 4700, the stall structure 4700 moves to the second position. The stall structure 4700 moves away from the stall clearance area 4301, and the stall structure 4700 is released from the stall clearance area 4301, so that the stall structure 4700 is released from the stall clutch shaft 4300. The stall structure 4700 is then engaged with the locking clutch assembly, and under the abutment of the outer wall of the stall clutch shaft 4300, the stall structure 4700 remains engaged with the locking clutch assembly.

[0051] Understandably, when the stall avoidance zone 4301 rotates to the set position M, the stall structure 4700 moves to the first position and engages with one of the stall avoidance zones 4301, so that the stall clutch shaft 4300 is in a locked and non-rotating state. At this time, the stall structure 4700 separates from the locking clutch assembly and releases the engagement, thereby releasing the locking clutch assembly from fixing the lock cylinder mechanism 1000, allowing the lock cylinder mechanism 1000 to move, and enabling the passive lock to unlock. When the stall avoidance zone 4301 rotates to the set position N, it moves to a position that is misaligned with the stall structure 4700. The stall structure 4700 leaves the stall avoidance zone 4301 and moves to the second position. The stall structure 4700 and the stall avoidance zone 4301 are then disengaged. At this time, the stall structure 4700 engages with the locking clutch assembly, thereby fixing the lock cylinder mechanism 1000 in place and locking the passive lock.

[0052] In one embodiment, the stall mechanism 4000 includes a stall bracket 4600, a stall driver 4100 and a stall clutch shaft 4300 disposed in the stall bracket 4600. The stall bracket 4600 is hollow to form a first mounting area, and the stall driver 4100 and the stall clutch shaft 4300 are disposed in the first mounting area.

[0053] Furthermore, the side wall of the stall bracket 4600 is provided with an inner channel that penetrates the side wall of the stall bracket 4600. The two ends of the inner channel extend to form ports. The first end of the inner channel extends to the first installation area to form a port connecting the first installation area, and the second end of the inner channel extends to the outer side of the stall bracket 4600.

[0054] Referring to the attached diagram, the stall structure 4700 is disposed in the inner channel, and the stall structure 4700 can reciprocate within the inner channel to move to the port of the inner channel. It can be understood that when the stall structure 4700 moves to the first port of the inner channel, the stall structure 4700 is in the first position; when the stall structure 4700 moves to the second port of the inner channel, the stall structure 4700 is in the second position.

[0055] It is understandable that when the stall avoidance area 4301 rotates to the set position M, one of the stall avoidance areas 4301 of the stall clutch shaft 4300 corresponds to the port at the first end of the inner channel, so that the stall structure 4700 can be engaged with the stall avoidance area 4301. When the stall avoidance area 4301 rotates to the set position N, the stall avoidance area 4301 is misaligned with the port of the first end of the inner channel, so that the stall avoidance area 4301 is misaligned with the stall structure 4700, thereby the stall structure 4700 leaves the stall avoidance area 4301, realizing the release of the stall structure 4700 from the stall avoidance area 4301. During the rotation of the stall clutch shaft 4300, the concave side wall of the stall avoidance area 4301 and the side wall of the stall clutch shaft 4300 gradually abut against the stall structure 4700, so as to push the stall structure 4700 from the first position to the second position. After that, the outer peripheral side wall of the stall clutch shaft 4300 seals the port of the first end of the inner channel, and the outer peripheral side wall of the stall clutch shaft 4300 maintains abutment against the stall structure 4700, so that the stall structure 4700 remains in the second position.

[0056] In one implementation, the stall structure 4700 is configured as a spherical structure, with its outer peripheral surface formed as a sphere. Further, the stall structure 4700 is configured as a steel ball.

[0057] During the second stroke of the forward rotation of the stall clutch shaft 4300, when the stall avoidance area 4301 rotates from the set position M to the set position N, the spherical sidewall of the stall structure 4700 abuts against the sidewall of the stall avoidance area 4301, which helps the stall clutch shaft 4300 push the stall structure 4700. Specifically, the spherical sidewall of the stall structure 4700 acts as a guide surface. When the concave sidewall of the stall avoidance area 4301 transitions to the outer circumferential sidewall of the stall clutch shaft 4300, the spherical sidewall of the stall structure 4700 can transition well, better completing the pushing of the stall structure 4700, so that the stall structure 4700 moves from the first position to the second position.

[0058] Furthermore, the blocking and avoidance zone is set as a spherical concave hole, and the sidewall of the concave area of ​​the blocking and avoidance zone is formed as a spherical surface.

[0059] Regarding the shape of the stall structure 4700, it can at least be alternatively designed as follows: the stall structure 4700 is configured as a columnar structure with a spherical end face. Further, the stall structure 4700 can be configured as a steel column with a spherical end face.

[0060] It should be noted that when the stall drive shaft 4200 completes its first stroke, it pushes the stall clutch shaft 4300 to perform a clearance stroke. The stall clutch shaft 4300 rotates a set angle A, at which point the stall clearance area 4301 rotates to a set position M, and the stall structure 4700 engages with the stall clearance area 4301 to fix the stall clutch shaft 4300 in place. At this point, the stall clutch shaft 4300 completes its clearance stroke. That is, when the stall structure 4700 engages with the stall clearance area 4301 corresponding to the first end of the inner channel, the clearance stroke of the stall clutch shaft 4300 is completed.

[0061] Under the elastic push of the stall elastic element 4400, when the stall clutch shaft 4300 completes the second stroke, the stall clutch shaft 4300 rotates by a set angle B. At this time, the stall clearance area 4301 and the stall structure 4700 are misaligned, and the outer peripheral sidewall of the stall clutch shaft 4300 abuts against the stall structure 4700.

[0062] Furthermore, on the outer peripheral sidewall of the stall clutch shaft 4300, the included angle C formed by the center positions of two adjacent stall avoidance areas 4301 on the circumference satisfies: C=A+B. When the stall clutch shaft 4300 completes the avoidance stroke and the second stroke by rotating forward, the next stall avoidance area 4301 moves to the position of the previous stall avoidance area 4301, completing the position change of two adjacent stall avoidance areas 4301.

[0063] It is understandable that the stall avoidance zones 4301 are evenly distributed on the outer peripheral sidewall of the stall clutch shaft 4300. Each time the stall clutch shaft 4300 completes one avoidance stroke and one second stroke, the stall clutch shaft 4300 rotates by an angle C, so that each stall avoidance zone 4301 rotates sequentially to the position of the port at the first end of the corresponding inner channel.

[0064] It should be noted that the interval between two adjacent stall avoidance zones 4301 refers to the circumferential distance between the center positions of the two adjacent stall avoidance zones 4301. Furthermore, when the stall clutch shaft 4300 completes its second stroke, the middle position of the outer peripheral sidewall between two adjacent stall avoidance zones 4301 of the stall clutch shaft 4300 abuts against the stall structure 4700.

[0065] In one embodiment, a transmission limiting structure is provided between the stalled drive shaft 4200 and the stalled clutch shaft 4300, and at least one transmission limiting structure is provided. The transmission limiting structure includes a transmission protrusion 4501 and a transmission recess 4502. One of the transmission protrusion 4501 and the transmission recess 4502 is located on the outer peripheral sidewall of the stalled drive shaft 4200, and the other is located on the inner peripheral sidewall of the stalled clutch shaft 4300. During forward rotation, the stalled drive shaft 4200 and the stalled clutch shaft 4300 are positioned relative to each other through the engagement of the transmission protrusion 4501 and the transmission recess 4502.

[0066] Furthermore, along the circumferential direction of forward rotation, the width of the transmission recess 4502 is greater than the width of the transmission protrusion 4501. Specifically, along the circumferential direction of forward rotation, when the front sidewall of the transmission recess 4502 abuts against the front sidewall of the transmission protrusion 4501, the energy storage stroke is completed; when the rear sidewall of the transmission recess 4502 abuts against the rear sidewall of the transmission protrusion 4501, the second stroke is completed.

[0067] When the stalled drive shaft 4200 is in its first stroke, it pushes the stalled clutch shaft 4300 through the stalled elastic element 4400. A gap exists between the front sidewall of the transmission protrusion 4501 and the front sidewall of the transmission recess 4502. When the stalled drive shaft 4200 is in its energy storage stroke, since the stalled clutch shaft 4300 is fixed and does not rotate, the stalled drive shaft 4200 rotates forward relative to the stalled clutch shaft 4300. The front sidewall of the transmission protrusion 4501 gradually approaches the front sidewall of the transmission recess 4502 until it abuts against the front sidewall of the transmission protrusion 4501. At this point, the stalled drive shaft 4200 stops rotating, and the energy storage stroke is complete. At this time, a gap exists between the rear sidewall of the transmission protrusion 4501 and the rear sidewall of the transmission recess 4502.

[0068] When the outer wall of the locking clutch shaft releases its resistance to the stall structure 4700, the elastic force of the stall elastic element 4400 pushes the stall clutch shaft 4300 to rotate forward for the second stroke. Since the stall drive shaft 4200 is fixed and does not rotate, the stall clutch shaft 4300 rotates forward relative to the stall drive shaft 4200. The rear side wall of the transmission recess 4502 gradually approaches the rear side wall of the transmission protrusion 4501 until the rear side wall of the transmission protrusion 4501 abuts against the rear side wall of the transmission recess 4502. At this point, the stall clutch shaft 4300 stops rotating, and the stall clutch shaft 4300 completes its second stroke. At this time, there is a gap between the front side wall of the transmission protrusion 4501 and the front side wall of the transmission recess 4502.

[0069] In some embodiments, at least two transmission limiting structures are provided, and each transmission limiting structure is distributed at equal intervals along the circumference.

[0070] In some examples, referring to the accompanying drawings, the transmission recess 4502 is provided on the inner sidewall of the stalled clutch shaft 4300, and the transmission protrusion 4501 is provided on the outer sidewall of the stalled transmission shaft 4200. Further, at least two transmission recesses 4502 are provided at equal intervals on the inner sidewall of the stalled clutch shaft 4300, and at least two transmission protrusions 4501 are provided at equal intervals on the outer sidewall of the stalled transmission shaft 4200.

[0071] In other alternative examples, the transmission recess 4502 is provided on the outer side wall of the stalled drive shaft 4200, and the transmission protrusion 4501 is provided on the inner side wall of the stalled clutch shaft 4300. Further, at least two transmission recesses 4502 are provided at equal intervals on the outer side wall of the stalled drive shaft 4200, and at least two transmission protrusions 4501 are provided at equal intervals on the outer side wall of the stalled clutch shaft 4300. As one embodiment, the stall elastic member 4400 is configured as a torsional elastic member, having two torsion arms that abut against the stalled drive shaft 4200 and the stalled clutch shaft 4300, respectively.

[0072] Referring to the attached drawings, the side wall of the stall clutch shaft 4300 is provided with a hooking area 4302. The hooking area 4302 is recessed in the side wall of the stall clutch shaft 4300 and forms a notch in the side wall of the stall clutch shaft 4300. A torsion arm of the stall elastic member 4400 is provided in the hooking area 4302. Furthermore, the side of the torsion arm abuts against the front side wall of the hooking area 4302, so that when the stall drive shaft 4200 pushes the stall clutch shaft 4300 through the stall elastic member 4400, the torsion arm of the stall elastic member 4400 can apply force to the front side wall of the hooking area 4302.

[0073] Furthermore, the stall drive shaft 4200 is provided with a hollow second mounting area, the stall elastic member 4400 is disposed in the second mounting area, and another torsion arm of the stall elastic member 4400 abuts against the inner sidewall of the second mounting area.

[0074] Of course, as an alternative, the installation method of the stall elastic element 4400 and the stall drive shaft 4200 can be designed as follows: the stall elastic element 4400 is sleeved on the stall drive shaft 4200, and one end of the stall drive shaft 4200 is provided with a column for sleeved on the stall elastic element 4400.

[0075] In one implementation, the stall actuator 4100 acquires power and signals via NFC connection. Specifically, the passive lock includes an NFC component 5000, which is electrically connected to the stall actuator 4100. The user connects an NFC unlocker to the NFC component 5000 to achieve power supply and signal transmission, thereby enabling the stall mechanism 4000 to obtain the necessary power to start. In use, the user attaches the NFC unlocker to the surface of the passive lock, the stall actuator 4100 receives power and starts, thereby driving the stall drive shaft 4200 to rotate forward.

[0076] It should be noted that, considering the inconvenience of using electricity in outdoor environments and the limited power storage of passive locks, passive locks cannot store much electricity. If the locking clutch assembly is directly driven by a motor, the large movement of the locking clutch assembly requires a large amount of power from the motor, resulting in high power consumption.

[0077] However, considering the inconvenience of outdoor power supply, this application designs a locking mechanism 4000 in conjunction with a movable locking structure 4700 to engage the locking clutch assembly. A locking actuator 4100 drives a locking drive shaft 4200, which in turn pushes a locking clutch shaft 4300 to rotate by a small set angle A, thereby releasing the locking structure 4700 from engaging the locking clutch assembly. The locking actuator 4100 then drives the locking drive shaft 4200 to rotate and compress the locking elastic element 4400, which in turn uses the elastic force of the locking elastic element 4400 to push the locking clutch shaft 4300 to rotate by a small set angle B, thus enabling the locking structure 4700 to engage the locking clutch assembly. In this case, since the movement distance of the stalled rotor structure 4700 is small, the power required for the stalled rotor drive 4100 to drive the stalled rotor transmission shaft 4200 to rotate is also small. Therefore, the stalled rotor drive 4100 consumes little power. The power supply of the stalled rotor drive 4100 can be met by the user supplying power to the stalled rotor drive 4100 through the NFC connection with the NFC unlocker.

[0078] On the other hand, when the motor of the stall drive 4100 stops running, the shaft of the stall drive 4100 will continue to rotate due to its own inertia. In this case, if the stall drive shaft 4200 and the stall clutch shaft 4300 are fixedly connected, if the shaft drives the stall drive shaft 4200 and the stall clutch shaft 4300 to continue rotating when the motor stops running, it will cause the position of the stall avoidance area 4301 to shift. If the stall structure 4700 jams the stall clutch shaft 4300, preventing the stall clutch shaft 4300, the stall drive shaft 4200, and the shaft of the stall drive 4100 from rotating, the motor may be damaged. Therefore, a stalling elastic element 4400 is provided between the stalled drive shaft 4200 and the stalled clutch shaft 4300 to buffer the rotation and convert the kinetic energy of this rotation into the elastic potential energy of the stalling elastic element 4400. Then, the elastic potential energy of the stalling elastic element 4400 is converted into the kinetic energy that pushes the stalled clutch shaft 4300 to rotate in the forward direction to complete the second stroke.

[0079] Furthermore, compared to conventional technologies that utilize the forward and reverse rotation of the motor or two consecutive forward rotations, this application uses an NFC unlocker to power and start the stall driver 4100 once, and utilizes the stall elastic element 4400 to compress and store energy, thereby achieving two rotations of the stall clutch shaft 4300, reducing the number of motor starts and extending the motor's service life.

[0080] Based on the above description of the stall mechanism, the following is a supplement to the structure of the lock cylinder mechanism 1000.

[0081] This application relates to a lock cylinder mechanism 1000, which includes a lock cylinder assembly and a lock tongue 1300. The lock cylinder assembly includes a lock cylinder shaft 1100, and the lock tongue 1300 is disposed at the first end of the lock cylinder shaft 1100. The lock cylinder shaft 1100 drives the lock tongue 1300 to rotate so that the lock tongue 1300 engages or disengages with the lock pin, thereby locking or unlocking the manhole cover.

[0082] An NFC unlocker is used to connect to the lock cylinder shaft 1100 of the lock cylinder mechanism 1000 and rotate the lock cylinder shaft 1100, thereby unlocking the lock cylinder mechanism 1000. Specifically, the NFC unlocker includes an unlocking handle, which is used to connect to the lock cylinder shaft 1100 and is capable of rotating the lock cylinder shaft 1100.

[0083] It is understood that the locking clutch assembly is connected to the lock cylinder 1100, and the locking clutch assembly can switch the lock cylinder 1100 to a rotatable or non-rotatable state for unlocking or locking. Referring to the accompanying drawings, the lock cylinder assembly includes a first locking structure 1200. The lock cylinder 1100 has a hollow inner cavity along its axial direction. A first through hole 1101 is provided on the side wall of the lock cylinder 1100, penetrating the side wall of the lock cylinder 1100. The first locking structure 1200 is movably disposed in the first through hole 1101. The first through holes 1101 are spaced at least two apart circumferentially, and correspondingly, there are at least two first locking structures 1200. It is understood that the first locking structure 1200 can move within the first through hole 1101, thereby engaging with the locking clutch assembly.

[0084] The first locking structure 1200 has a first engaging position and a first abutting position. In the first through hole 1101, the first engaging position of the first locking structure 1200 is close to the outer side of the lock cylinder 1100, and the first abutting position is close to the inner side of the lock cylinder 1100. Specifically, the first locking structure 1200 can move outward to the first engaging position. At this time, the first locking structure 1200 engages with the locking clutch assembly on the outer side of the lock cylinder 1100, the NFC unlocker cannot connect to the lock cylinder 1100, the lock cylinder 1100 cannot rotate, and the passive lock cannot be unlocked. Alternatively, the first locking structure 1200 can move inward to the first abutting position. At this time, the first locking structure 1200 engages with the locking clutch assembly on the inner side of the lock cylinder 1100, the NFC unlocker can connect to the lock cylinder 1100, and the lock cylinder 1100 can be rotated, thus the passive lock can be unlocked.

[0085] The locking clutch assembly includes a first clutch shaft 2100. The stall structure can engage or disengage with the first clutch shaft to fix or allow the locking clutch assembly to move, thereby fixing or allowing the lock cylinder mechanism 1000 to move, and thus enabling the passive lock to lock or unlock.

[0086] Furthermore, the locking clutch assembly also includes a second clutch shaft 2200 and a third clutch shaft 2300. On the lock cylinder shaft 1100, through the cooperation of the first clutch shaft 2100, the second clutch shaft 2200 and the third clutch shaft 2300, the first locking structure 1200 can be moved and switched between a first engaging position and a first abutment position, thereby realizing the engagement between the NFC unlocker and the second end of the lock cylinder shaft 1100, and realizing the unlocking and locking of the NFC unlocker by rotating the lock cylinder shaft 1100.

[0087] Referring to the accompanying drawings, the first clutch shaft 2100 is sleeved on the outer side of the first end of the lock cylinder shaft 1100, and relative rotation between the first clutch shaft 2100 and the lock cylinder shaft 1100 is possible. Furthermore, the first clutch shaft 2100 has a first locked position; when the lock cylinder mechanism 1000 is in the locked state, the first clutch shaft 2100 is in the first locked position. It can be understood that rotation of the first clutch shaft 2100 relative to the lock cylinder shaft 1100 can either rotate it to the first locked position or disengage it from the first locked position.

[0088] The second clutch shaft 2200 is disposed within the inner cavity of the lock cylinder shaft 1100, and the second clutch shaft 2200 is capable of reciprocating along the axial direction of the lock cylinder shaft 1100. Further, the second clutch shaft 2200 has a second locking position and a second unlocking position within the lock cylinder shaft 1100, and the second clutch shaft 2200 can move within the lock cylinder shaft 1100 to either the second locking position or the second unlocking position. It should be noted that during the rotation of the first clutch shaft 2100 relative to the lock cylinder shaft 1100 and its movement away from the first locking position, the first clutch shaft 2100 can drive the second clutch shaft 2200 to move along the axial direction of the lock cylinder shaft 1100, thereby moving the second clutch shaft 2200 from the second locking position to the second unlocking position. Furthermore, when the second clutch shaft 2200 is in the second unlocked position, the first locking structure 1200 can move to the first clearance position and engage with the outer side of the second clutch shaft 2200, thereby preventing the second clutch shaft 2200 from moving in the opposite direction from the second unlocked position to the second locked position.

[0089] The third clutch shaft 2300 is sleeved on the outer side of the second end of the lock cylinder shaft 1100, and the third clutch shaft 2300 can reciprocate along the axial direction of the lock cylinder shaft 1100. Further, the third clutch shaft 2300 has a third locking position and a third unlocking position on the outer surface of the lock cylinder shaft 1100, and the third clutch shaft 2300 can move to either the third locking position or the third unlocking position on the outer surface of the lock cylinder shaft 1100. It should be noted that when the second clutch shaft 2200 moves to the second unlocking position, the NFC unlocker applies pressure to the end of the third clutch shaft 2300, which allows the third clutch shaft 2300 to move from the third locking position along the axial direction of the lock cylinder shaft 1100 to the third unlocking position. This allows the NFC unlocker to connect to the lock cylinder shaft 1100 and rotate the lock cylinder shaft 1100, thereby unlocking the passive lock.

[0090] When locked, the first clutch shaft 2100 is in the first locked position, the second clutch shaft 2200 is in the second locked position, and the third clutch shaft 2300 is in the third locked position. The outer side of the second clutch shaft 2200 abuts against the first locking structure 1200, so that the first locking structure 1200 is in the first engaging position and engages with the third clutch shaft 2300. It can be understood that the outer side of the second clutch shaft 2200 seals the port of the first through hole 1101, so that the first locking structure 1200 and the inner side of the third clutch shaft 2300 remain engaged, thereby preventing the third clutch shaft 2300 from moving axially along the lock cylinder shaft 1100. In this case, even if the NFC unlocker applies pressure to the third clutch shaft 2300, it cannot move. On the other hand, at this time, the second end face of the lock cylinder shaft 1100 does not protrude from the end of the third clutch shaft 2300 or from the surface of the lock housing, so the NFC unlocker cannot engage with the lock cylinder shaft 1100 and the passive lock cannot be unlocked.

[0091] During unlocking, the first clutch shaft 2100 rotates in a first direction, moving away from the first locked position. Simultaneously, the first clutch shaft 2100 pushes the second clutch shaft 2200 to move in a second direction parallel to the first to second ends of the lock cylinder shaft 1100, moving the second clutch shaft 2200 from the second locked position to the second unlocked position. This provides a first clearance position for the outer side of the second clutch shaft 2200 towards the first locking structure 1200. At this time, the NFC unlocker applies pressure to the third clutch shaft 2300, causing it to move in the opposite direction to the second direction, reaching the third unlocked position.

[0092] During the movement of the third clutch shaft 2300 in the opposite direction to the second direction: on the one hand, the inner wall of the third clutch shaft 2300 abuts against the first locking structure 1200, so that the first locking structure 1200 moves to the first clearance position, thereby releasing the first locking structure 1200 from the third clutch shaft 2300. At this time, the inner wall of the third clutch shaft 2300 blocks the port of the first through hole 1101 and abuts against the first locking structure 1200, so that the first locking structure 1200 remains engaged with the outer wall of the second clutch shaft 2200. On the other hand, after the third clutch shaft 2300 moves in the opposite direction of the second direction, the second end of the lock cylinder shaft 1100 protrudes from the end of the third clutch shaft 2300, so that the NFC unlocker can engage with the second end of the lock cylinder shaft 1100. Furthermore, when the NFC unlocker applies torque to the second end of the lock cylinder shaft 1100, the lock cylinder shaft 1100 can be rotated in the opposite direction of the first direction. The lock cylinder shaft 1100 drives the bolt 1300 to move, thus realizing the unlocking of the passive lock.

[0093] In one embodiment, the lock cylinder mechanism 1000 includes a locking linkage structure 3000, which is rotatably disposed on the lock housing. The locking linkage structure 3000 is hollow, and the hollow inner cavity of the locking linkage structure 3000 is formed into a cylindrical inner cavity. The locking linkage structure 3000 is sleeved on the outside of the first clutch shaft 2100. The locking linkage structure 3000 serves as the housing of the lock cylinder mechanism 1000. The lock cylinder shaft 1100, the first clutch shaft 2100, and the third clutch shaft 2300 are all disposed on the locking linkage structure 3000.

[0094] Referring to the attached diagram, the first end of the lock cylinder 1100 extends from the first end of the locking linkage structure 3000 and connects to the bolt 1300. Further, the locking linkage structure 3000 is connected to the bolt 1300. During unlocking, the lock cylinder 1100 drives the bolt 1300 to rotate, and simultaneously, the bolt 1300 drives the locking linkage structure 3000 to rotate synchronously. During unlocking, the locking linkage structure 3000 rotates in the opposite direction to the first direction, and the locking linkage structure 3000 drives the first clutch shaft 2100 to rotate synchronously, so that the first clutch shaft 2100 rotates to the first locking position.

[0095] Referring to the accompanying drawings, the locking linkage structure 3000 has a first clearance area 3100 on its side wall, which extends through the side wall. The outer side wall of the first clutch shaft 2100 has a first actuating part 2101 located within the first clearance area 3100. Furthermore, the width of the first clearance area 3100 is greater than that of the first actuating part 2101. When the first clutch shaft 2100 rotates in the first direction, the first actuating part 2101, which rotates with the first clutch shaft 2100, has room to move within the first clearance area 3100, preventing the side wall of the first clearance area 3100 from obstructing the first clutch shaft 2100 from moving away from the first locking position.

[0096] When unlocking, the bolt 1300 drives the locking linkage structure 3000 to rotate in the opposite direction of the first direction, and the locking linkage structure 3000 abuts against the first actuating part 2101 through the side wall of the first clearance area 3100, so as to drive the first clutch shaft 2100 to rotate synchronously in the opposite direction of the first direction to the first locking position, thereby realizing the reset of the first clutch shaft 2100 at the same time as the lock cylinder mechanism 1000 is unlocked.

[0097] In one implementation, the stall structure 4700 is located outside the lock cylinder mechanism 1000, and the stall structure 4700 is engaged with the first clutch shaft 2100 so that the first clutch shaft 2100 is fixed in the first locked position. Further, the stall structure 4700 can be moved to release the engagement of the stall structure 4700 with the first clutch shaft 2100 so that the first clutch shaft 2100 can rotate in the first direction.

[0098] Understandably, when the locking linkage structure 3000 drives the first clutch shaft 2100 to reset to the first locking position, the stall structure 4700 re-engages with the first clutch shaft 2100, thus fixing the first clutch shaft 2100 back to the first locking position.

[0099] Referring to the attached drawings, a first engaging area 2104 is provided at the end of the first actuating part 2101 extending out of the first clearance area 3100. The first engaging area 2104 is recessed and formed. When the stall structure 4700 engages with the first clutch shaft 2100, the stall structure 4700 is partially located in the first engaging area 2104.

[0100] In one embodiment, the locking clutch assembly includes a first elastic element 2401, one end of which is connected to a first clutch shaft 2100, and the other end of which is fixedly disposed in the lock housing. The first elastic element 2401 is used to drive the first clutch shaft 2100 to rotate in a first direction.

[0101] Specifically, when the lock cylinder mechanism 1000 is locked and the first clutch shaft 2100 is in the first locked position, the first elastic element 2401 is in a stretched state and possesses tensile elastic potential energy. After the stall structure 4700 releases its engagement with the first clutch shaft 2100, under the action of the first elastic element 2401, the first clutch shaft 2100 can rotate in the first direction, thereby pushing the second clutch shaft 2200 to move in the second direction. It can be understood that by utilizing the first elastic element 2401 in conjunction with the stall structure 4700, the first clutch shaft 2100 can automatically rotate in the first direction.

[0102] In some examples, the first elastic element 2401 is configured as a tension spring.

[0103] In one embodiment, a rotary push structure 2102 is provided inside the first clutch shaft 2100, and the rotary push structure 2102 is located outside the first end of the lock cylinder shaft 1100. When the first clutch shaft 2100 rotates, the first clutch shaft 2100 pushes the second clutch shaft 2200 to move in the second direction through the rotary push structure 2102.

[0104] Specifically, the rotary push structure 2102 has a rotary push inclined surface, and a second sliding portion 2201 protruding from the outer side of the lock core shaft 1100 is provided on the outer side of the second clutch shaft 2200. The second sliding portion 2201 is close to the first end of the second clutch shaft 2200, and the rotary push inclined surface abuts against the side of the second sliding portion 2201. When the first clutch shaft 2100 is in the first locked position and the second clutch shaft 2200 is in the second locked position, the second sliding portion 2201 is located in the recessed area 2103 formed by the rotary push inclined surface on the rotary push structure 2102. When the first clutch shaft 2100 and the rotary push structure 2102 rotate in the first direction, the rotary push inclined surface pushes the second sliding portion 2201 to move the second clutch shaft 2200 in the second direction.

[0105] Referring to the accompanying drawings, the rotary push structure 2102 is arranged around the outside of the lock cylinder shaft 1100, and the rotary push inclined surface forms a V-shaped recessed area 2103 on the end face of the rotary push structure 2102. Furthermore, the end face of the rotary push structure 2102 has a stop plane 2105. After the rotary push structure 2102 rotates and pushes the second clutch shaft 2200, the second sliding portion 2201 of the second clutch shaft 2200 is positioned on the stop plane 2105, thereby keeping the second clutch shaft 2200 in the second unlocked position.

[0106] Furthermore, at least two second sliding portions 2201 are provided, and the second sliding portions 2201 are evenly distributed along the circumference of the outer peripheral sidewall of the second clutch shaft 2200. Referring to the accompanying drawings, two second sliding portions 2201 are provided, with a round rod penetrating the second clutch shaft 2200 radially, and both ends of the round rod protruding from the outer peripheral sidewall of the second clutch shaft 2200, thereby forming two second sliding portions 2201. Correspondingly, the rotary push structure 2102 has two oppositely positioned recessed areas 2103 for pushing the two second sliding portions 2201 respectively.

[0107] Understandably, a first groove 1102 is provided on the side wall of the lock cylinder 1100 near the first end. The first groove 1102 penetrates the side wall of the lock cylinder 1100 and is arranged parallel to the second direction. The second sliding part 2201 can move along the first groove 1102. Specifically, when the second clutch shaft 2200 reciprocates axially in the lock cylinder 1100, the second sliding part 2201 moves along the first groove 1102.

[0108] Referring to the accompanying drawings, the sidewalls of the lock cylinder 1100 are respectively provided with first sliding grooves 1102 at opposite positions, and second sliding parts 2201 extend from the first sliding grooves 1102. The second sliding parts 2201 protrude from the outer peripheral sidewalls of the lock cylinder 1100 so that the side of the second sliding parts 2201 can abut against the rotary push structure 2102 so that the first clutch shaft 2100 can push the second clutch shaft 2200.

[0109] Furthermore, the diameter of the second sliding part 2201 is equal to or slightly smaller than the width of the first slide groove 1102. When the lock cylinder shaft 1100 and the lock tongue 1300 rotate to unlock in the opposite direction of the first direction, the side wall of the first slide groove 1102 abuts against the second sliding part 2201 to drive the second clutch shaft 2200 to rotate synchronously in the opposite direction of the first direction.

[0110] In this case, the lock cylinder shaft 1100 can drive the second clutch shaft 2200 to rotate synchronously. When the lock cylinder shaft 1100 drives the bolt 1300 to rotate in the first direction and relocks the passive lock, the second clutch shaft 2200 rotates with the lock cylinder shaft 1100, and the second sliding part 2201 rotates in the first direction to a position deviating from the stop plane 2105. The second sliding part 2201 is axially positioned in the recessed area 2103 formed by the corresponding rotary pushing slope. If the second clutch shaft 2200 moves in the opposite direction of the second direction, the second clutch shaft 2200 resets from the second unlock position to the second lock position. Correspondingly, the second sliding part 2201 moves to the recessed area 2103 formed by the rotary pushing slope.

[0111] In one embodiment, the locking clutch assembly includes a second elastic element 2402, which is disposed at one end of the second clutch shaft 2200 and at the second end of the second clutch shaft 2200, near the second end of the lock cylinder shaft 1100. When the second clutch shaft 2200 is in the second unlocked position, the second elastic element 2402 is compressed and deformed, and possesses compressive elastic potential energy.

[0112] It is understandable that if the first locking structure 1200 releases its engagement with the second clutch shaft 2200, then under the action of the second elastic member 2402, the second clutch shaft 2200 can move in the opposite direction of the second direction, so that the second clutch shaft 2200 resets and moves to the second locking position.

[0113] Referring to the accompanying drawings, a lock cylinder cover 1103 is provided at the second end of the lock cylinder shaft 1100, and the two ends of the second elastic member 2402 are respectively connected to the inner side of the lock cylinder cover 1103 and the second clutch shaft 2200. In some examples, the second elastic member 2402 is configured as a spring. The second elastic member 2402 is sleeved on the second end of the second clutch shaft 2200, or the second end of the second clutch shaft 2200 has a cylindrical cavity, and the end of the second elastic member 2402 is disposed in the cylindrical cavity.

[0114] In one embodiment, the inner peripheral sidewall of the third clutch shaft 2300 is provided with a third engaging area 2301, which is recessed into the inner peripheral sidewall of the third clutch shaft 2300. When the first locking structure 1200 is in the first engaging position, the first locking structure 1200 is partially located in the first through hole 1101 and partially located in the third engaging area 2301, thereby realizing the engaging between the first locking structure 1200 and the third clutch shaft 2300.

[0115] Furthermore, the third engagement area 2301 is arranged in a ring on the inner peripheral sidewall of the third clutch shaft 2300, forming a ring-shaped engagement groove.

[0116] In some examples, the third clutch shaft 2300 is connected to the locking linkage structure 3000, and when the locking linkage structure 3000 rotates synchronously with the lock tongue 1300 to unlock, the locking linkage structure 3000 drives the third clutch shaft 2300 to rotate synchronously. In this case, the third locking area 2301 is set as an annular locking groove, which can prevent the first locking structure 1200 from blocking the rotation of the third clutch shaft 2300, so that the third clutch shaft 2300 can rotate relative to the lock cylinder shaft 1100.

[0117] Referring to the accompanying drawings, a second slide groove 3200 is provided on the side wall of the second end of the locking linkage structure 3000. The second slide groove 3200 penetrates the side wall of the locking linkage structure 3000 and is arranged parallel to the second direction. A third sliding part 2302 is provided on the outer side of the third clutch shaft 2300. The third sliding part 2302 is located in the second slide groove 3200. When the third clutch shaft 2300 reciprocates along the axial direction of the lock cylinder shaft 1100, the third sliding part 2302 moves along the second slide groove 3200. Furthermore, when the locking linkage structure 3000 rotates, the inner side wall of the second slide groove 3200 abuts against the side of the third sliding part 2302, so that the third clutch shaft 2300 can be driven to rotate synchronously through the third sliding part 2302.

[0118] In one embodiment, the locking clutch assembly includes a third elastic element 2403, which is disposed in the locking linkage structure 3000. The two ends of the third elastic element 2403 abut against the locking linkage structure 3000 and the third clutch shaft 2300, respectively. When the third clutch shaft 2300 is pressed and moved to the third unlocked position, the third elastic element 2403 is compressed and deformed, and the third elastic element 2403 possesses compressive elastic potential energy.

[0119] After the passive lock completes locking and the NFC unlocker is removed from the lock cylinder mechanism 1000, the third clutch shaft 2300 can move along the first direction under the action of the third elastic member 2403, so that the third clutch shaft 2300 moves from the third unlock position to the third locking position. In this case, the third engaging area 2301 moves to the position corresponding to the first through hole 1101, and the second clutch shaft 2200 moves in the opposite direction of the second direction under the action of the second elastic member 2402, pushing the first locking structure 1200 from the first clearance position to the first engaging position, so that the first locking structure 1200 engages with the third clutch shaft 2300.

[0120] In one embodiment, the outer peripheral sidewall of the second clutch shaft 2200 is provided with a second clearance area 2202, which is recessed into the outer peripheral sidewall of the second clutch shaft 2200. When the first locking structure 1200 is in the first clearance position, the first locking structure 1200 is partially located in the first through hole 1101 and partially located in the second clearance area 2202, thereby realizing the engagement between the first locking structure 1200 and the second clutch shaft 2200.

[0121] Furthermore, the second clearance area 2202 is arranged in a ring on the outer peripheral sidewall of the second clutch shaft 2200, forming a ring-shaped locking groove.

[0122] In one embodiment, the first locking structure 1200 has a spherical end so that the first locking structure 1200 can smoothly engage with the third engagement area 2301 or the second clearance area 2202, and can smoothly disengage from the third engagement area 2301 or the second clearance area 2202.

[0123] Specifically, the first locking structure 1200 is configured as a spherical structure or a cylindrical structure with spherical ends. In some examples, the stall structure 4700 is configured as a steel ball or a steel column with spherical ends.

[0124] In the description of this specification, the use of terms such as "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0125] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

[0126] In the description of this application, the presence of a comma ("、") in the patent title indicates an "and" relationship, not an "or" relationship. For example, if the patent title is "A and B", it means that the content claimed in this application is: a technical solution with the subject matter title A and a technical solution with the subject matter title B.

Claims

1. A stall mechanism, characterized by: include A stalled rotor actuator (4100) having a shaft at its output end; A stall drive shaft (4200) is connected to the shaft of the stall drive (4100). The stall drive (4100) drives the stall drive shaft (4200) to rotate forward by a set angle. The set angle of forward rotation of the stall drive shaft (4200) includes a first stroke and an energy storage stroke. A stall clutch shaft (4300) is sleeved on the outside of the stall drive shaft (4200). The outer peripheral sidewall of the stall clutch shaft (4300) is provided with at least two recessed stall clearance areas (4301) at circumferential intervals. The stall clutch shaft (4300) can rotate forward by a set angle, and the set angle of forward rotation of the stall clutch shaft (4300) includes a clearance stroke and a second stroke. A stall structure (4700) is reciprocating and can move to a position where it engages with the stall avoidance area (4301) or move in the opposite direction to a position where it is released from engagement with the stall avoidance area (4301). A stall elastic element (4400) is disposed on the stall drive shaft (4200), and the stall elastic element (4400) acts on the stall drive shaft (4200) and the stall clutch shaft (4300) respectively. The stall drive shaft (4200) can drive the stall clutch shaft (4300) to rotate in the forward direction through the stall elastic element (4400). When the stall drive shaft (4200) completes its first stroke, the stall clutch shaft (4300) completes its clearance stroke. At this time, the stall clearance area (4301) rotates to a set position M, and the stall structure (4700) moves to a position where it engages with one of the stall clearance areas (4301), so that the stall clutch shaft (4300) is in a locked, non-rotating state. The stall drive shaft (4200) continues to rotate forward and completes the storage. When the stroke is in progress, the stall elastic element (4400) completes compression and energy storage; the elastic force of the stall elastic element (4400) can push the stall clutch shaft (4300) to complete the second stroke, so that the stall avoidance area (4301) rotates to the set position N. At this time, the stall avoidance area (4301) moves to a position that is misaligned with the stall structure (4700) and the stall structure (4700) is released from the stall avoidance area (4301).

2. The stall mechanism of claim 1, wherein: A transmission limiting structure is provided between the stall drive shaft (4200) and the stall clutch shaft (4300). The transmission limiting structure includes a transmission protrusion (4501) and a transmission recess (4502). One of the transmission protrusion (4501) and the transmission recess (4502) is located on the outer peripheral sidewall of the stall drive shaft (4200), and the other is located on the inner peripheral sidewall of the stall clutch shaft (4300). In the circumferential direction of rotation, the width of the transmission recess (4502) is greater than the width of the transmission protrusion (4501); in the forward circumferential direction of rotation, when the front sidewall of the transmission recess (4502) abuts against the front sidewall of the transmission protrusion (4501), the energy storage stroke is completed; when the rear sidewall of the transmission recess (4502) abuts against the rear sidewall of the transmission protrusion (4501), the second stroke is completed.

3. A stall prevention mechanism according to claim 1 or 2, wherein: The stall mechanism (4000) includes a stall bracket (4600), a stall actuator (4100) and a stall clutch shaft (4300) disposed on the stall bracket (4600). The side wall of the stall bracket (4600) is provided with an inner channel. The stall structure (4700) is disposed in the inner channel. The two ends of the inner channel extend to form ports. When the stall avoidance area (4301) rotates to the set position M, one of the stall avoidance areas (4301) corresponds to the port at the first end of the inner channel. When the stall avoidance area (4301) rotates to the set position N, the outer peripheral side wall of the stall clutch shaft (4300) seals the port at the first end of the inner channel.

4. The stall mechanism of claim 3, wherein: The stall structure (4700) is configured as a spherical structure or the stall structure (4700) is configured as a cylindrical structure with a spherical end face.

5. The stall mechanism of claim 4, wherein: The blocking and avoidance zone is configured as a spherical concave hole.

6. The stall mechanism according to claim 1 or 2, characterized in that: The stall elastic element (4400) is configured as a torsional elastic element.

7. The stall mechanism according to claim 1 or 2, characterized in that: When the stall drive shaft (4200) completes the first stroke, the stall clutch shaft (4300) rotates by a set angle A. When the stall clutch shaft (4300) completes the second stroke, the stall clutch shaft (4300) rotates by a set angle B. On the outer peripheral sidewall of the stall clutch shaft (4300), the included angle formed by the center positions of two adjacent stall avoidance areas (4301) on the circumference is C, which satisfies: C=A+B.

8. The stall mechanism according to claim 7, characterized in that: On the outer peripheral sidewall of the stall clutch shaft (4300), the stall avoidance area (4301) is evenly distributed.

9. A passive lock, characterized in that: include Lock cylinder mechanism (1000); The stall mechanism (4000) as described in any one of claims 1 to 8; An NFC component (5000) is electrically connected to the stall drive (4100), and a user connects to the NFC component (5000) using an NFC unlocker to achieve power supply and signal transmission. When the stall mechanism (4700) moves to a position where it engages with one of the stall clearance areas (4301), the lock cylinder mechanism (1000) can move, and the passive lock is unlocked. When the stall clearance area (4301) is misaligned with the stall mechanism (4700) and the stall mechanism (4700) moves to a position where it is unengaged from the stall clearance area (4301), the lock cylinder mechanism (1000) is fixed and does not move, and the passive lock is locked.

10. The passive lock according to claim 9, characterized in that: The lock cylinder mechanism (1000) includes a locking clutch assembly connected to the lock cylinder mechanism (1000). When the stall avoidance area (4301) is misaligned with the stall structure (4700) and the stall structure (4700) moves to a position where it is disengaged from the stall avoidance area (4301), the stall structure (4700) engages with the locking clutch assembly to fix the lock cylinder mechanism (1000), at which point the passive lock is locked. When the stall structure (4700) moves to a position where it engages with one of the stall avoidance areas (4301), the stall structure (4700) disengages from the locking clutch assembly, at which point the locking clutch assembly releases its fixation on the lock cylinder mechanism (1000), and the passive lock is unlocked.

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