A mechanical key switch control structure for a smart lock on a glass door

Abstract

This invention discloses a mechanical key switch control structure for a smart lock on a glass door, relating to the field of smart lock technology. It includes: a key mechanism comprising a key body with physical teeth and an electronic identity carrier disposed within it; and a mechanical key switch mechanism coupled to the key mechanism. The entire structure utilizes a multi-stage transmission stroke structure composed of a key core, a synchronous gear, a U-shaped gear, and a stroke gear to sequentially convert a single rotation of the key body into a first stroke signal, a second stroke signal, and a third stroke signal, forming multi-dimensional mechanical motion characteristic data. Simultaneously, a control component is coaxially mounted on the side end of the stroke gear. This control component ensures smooth transmission through the smooth working area of ​​the asymmetrical cam during normal key rotation, and triggers the mechanical self-locking of the ratchet and pawl components through a steep limiting area during forced entry or abnormal rotation, achieving a dual protection function of normal passage and abnormal blocking.

Description

Technical Field

[0001] This invention relates to the field of smart lock technology, specifically to a mechanical key switch control structure for a smart lock on a glass door. Background Technology

[0002] With the increasing demand for security and the widespread use of smart door locks, glass doors, due to their aesthetic and transparent characteristics, have placed higher demands on the security, reliability, and aesthetics of the matching locks.

[0003] Currently, most existing smart locks for glass doors use mechanical key switches that follow the traditional mechanical lock cylinder design. They rely solely on a pin tumbler mechanism for physical decryption, with the key rotation directly engaging the bolt or clutch mechanism to unlock. This lack of refined detection and verification of the key's rotational travel characteristics is problematic. For example, some glass door locks on the market only have basic key insertion detection functions, failing to acquire multi-dimensional travel information such as key rotation angle and displacement. This results in an inability to establish effective linkage between the mechanical unlocking action and the electronic authentication system, creating a risk of technical unlocking. Furthermore, the mechanical key transmission mechanism in smart glass door locks is often a single-path transmission; torque is directly transmitted to the actuator after key insertion, lacking effective travel conversion and signal acquisition. This means that in terms of resistance to forced entry, the mechanical lock cylinder typically relies solely on the structural strength of the lock body to resist external forces, lacking an active mechanical self-locking and electronic sensing linkage protection mechanism. When subjected to forced entry, twisting, or impact, existing lock cylinders cannot achieve self-locking at the mechanical level, nor can they provide real-time feedback to the control system for alarm or locking, resulting in insufficient protection. Summary of the Invention

[0004] The purpose of this invention is to provide a mechanical key switch control structure for a smart lock on a glass door, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mechanical key switch control structure for a smart lock on a glass door, comprising: A key mechanism, comprising a key body with physical teeth; A mechanical key switch mechanism, coupled with a key mechanism, is used to convert the rotational motion of the key body into a first stroke signal; The certification and testing organization is located inside the mechanical key switch mechanism, and the certification and testing organization includes a stroke detection structure for detecting the first stroke signal; The control execution structure is configured to generate a valid unlock control signal and control the actuator to operate only when a first stroke signal that meets preset legal conditions is received simultaneously.

[0006] Preferably, the mechanical key switch mechanism includes: The key core is used to receive the rotational torque of the key body; The transmission stroke structure is sleeved on the key core. The transmission stroke structure includes a synchronous gear sleeved on the outside of the key core and a U-shaped gear meshing with the synchronous gear. The U-shaped glass clamp is used to install the key core, the certification and testing mechanism, and the control and execution structure. The bottom of the U-shaped glass clamp has a stroke groove, which is used to convert the rotational motion of the synchronous gear into a second stroke signal for the linear motion of the U-shaped gear.

[0007] Preferably, a stroke gear is synchronously meshed with the other end of the U-shaped gear. The U-shaped gear is used to convert the rotation of the stroke gear into a third stroke signal. A control component and a switch transmission component are coaxially arranged on the side end of the stroke gear in sequence. The switch transmission component is synchronously driven by the third stroke signal of the stroke gear to drive the execution switch component connected at the end.

[0008] Preferably, the control component includes an asymmetrical cam coaxially arranged with a stroke gear. The asymmetrical cam has a smooth working area and a steep limiting area. A contact wheel is slidably connected to the side end of the asymmetrical cam. A force-bearing buffer rod is sleeved on the side end of the contact wheel. A transmission component is connected to the side end of the force-bearing buffer rod. A limiting shell is sleeved on the outside of the transmission component. The transmission component is rotatably connected to the outside of the rotating column at the top of the limiting shell.

[0009] Preferably, the control components further include: Pawls are used to receive the rotational torque of transmission components; The ratchet component is used to receive the rotational torque of the pawl component; The pawl and ratchet components rotate on the inner wall surface of the limiting shell, respectively. An angle sensor is installed on the side end of the ratchet component, and a pressure sensor is installed on the inner wall surface of the limiting shell. A contact spring and a feedback element for feeding back the contact spring pressure and electrically connected to the pressure sensor are respectively installed on the side end of the pressure sensor. The side end of the contact spring is connected to the outer surface of the ratchet component.

[0010] Preferably, the stroke detection structure consists of an angle sensor and a pressure sensor. The stroke detection structure is linked with the key core and the transmission stroke structure to detect the rotation angle or linear displacement in real time to generate a stroke signal. When the key body rotates to within the first preset angle, the U-shaped gear moves at a constant speed. When the rotation angle exceeds the first preset angle, the lift of the asymmetrical cam profile increases sharply, which obstructs the movement of the U-shaped gear and triggers the self-locking of the ratchet and pawl components.

[0011] Preferably, the switch transmission assembly includes a transmission gear and a rotating handle, the transmission gear and the rotating handle being coaxially arranged, and the rotating handle being used to receive the rotational torque of the stroke gear.

[0012] Preferably, the actuation switch assembly is a position switch that can be triggered by rotating the lever, and the actuation switch assembly includes: A force-bearing slide, which is used to support the rotation of the rotating handle and slides along the surface of the internally slidingly connected slot frame; A synchronous force-bearing block is installed at the bottom of the force-bearing sliding component. Switch actuators are symmetrically rotated at both ends of the side surface of the synchronous force-bearing block along its central axis. A snap-fit ​​edge is installed at the end of the switch actuator. A closure feedback component is installed on the side wall surface of the switch actuator. The closure feedback component is signal-connected to the certification and testing agency.

[0013] Preferably, the control actuator includes a main control chip, which is used to compare the stroke signal with the pre-stored valid stroke, determine whether the stroke trajectory and the endpoint value both meet the expectations, and trigger the drive actuator, wherein the drive actuator is at least one of a micro motor or a piezoelectric ceramic actuator.

[0014] Preferably, the output end of the drive actuator extends under normal conditions to lock the transmission path of the ratchet and pawl components, and the drive actuator retracts to release the lock only when a valid unlocking control signal is received.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, a multi-stage transmission stroke structure consisting of a key core, a synchronous gear, a U-shaped gear, and a stroke gear is used to sequentially convert the single rotation of the key body into a first stroke signal (rotation angle and angular velocity), a second stroke signal (linear displacement and velocity), and a third stroke signal (composite rotation angle, pressure, and time parameters), forming multi-dimensional mechanical motion characteristic data. Simultaneously, a control component is coaxially mounted on the side of the stroke gear. This control component ensures smooth transmission through the smooth working area of ​​the asymmetrical cam during normal key rotation, and triggers the mechanical self-locking of the ratchet and pawl components through a steep limiting area during forceful lock picking or abnormal rotation, achieving a dual protection function of normal passage and abnormal blocking. Furthermore, by integrating an angle sensor and a pressure sensor inside the control component, the rotation angle of the ratchet component and the meshing pressure of the pawl component can be collected in real time, forming a unique combined characteristic signal. The mechanical self-locking state can also be linked with an electrical alarm signal, achieving a synergistic effect of mechanical blocking and electronic sensing.

[0016] Furthermore, the drive actuator in the control mechanism maintains its output end extended under normal conditions, directly locking the final transmission path between the actuator and the control switch assembly. Combined with a hierarchical control logic of small-angle pre-detection, unlocking upon successful activation and locking upon unauthorized activation, this ensures the transmission path remains mechanically locked in standby mode, preventing unauthorized opening, while also allowing for rapid unlocking after a legitimate key is inserted and rotated a small angle, without affecting the user's normal unlocking experience. By incorporating a flexible reset or electronic reset mechanism, along with lithium battery power and emergency power interfaces, the drive actuator automatically returns to its normal locked state after each unlocking operation, ensuring emergency use even with low battery or power outages. Overall, this significantly improves the glass door smart lock's resistance to violent damage, its ability to resist technical unlocking, and its overall reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure in this invention; Figure 2 This is a schematic diagram of the side end structure of the mechanical key switch mechanism in this invention; Figure 3 This is a schematic diagram of the separate structure of the mechanical key switch mechanism in this invention; Figure 4 This is a schematic diagram of the separate structure of the switching assembly in this invention; Figure 5 This is a schematic diagram of the separation structure of the control components in this invention; Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle.

[0018] In the diagram: 100, key body; 200, mechanical key switch mechanism; 210, U-shaped glass plate; 220, key core; 230, synchronous gear; 240, U-shaped gear; 250, stroke groove; 260, control component; 261, asymmetrical cam; 262, frame; 263, contact wheel; 264, force buffer rod; 265, transmission component; 267, pressure sensor; 268, pawl; 269, ratchet; 2 690, Limiting housing; 2691, Angle sensor; 2692, Contact spring; 2693, Feedback element; 270, Switch transmission assembly; 271, Transmission gear; 272, Rotating handle; 280, Actuating switch assembly; 281, Force-bearing slide; 282, Slot frame; 283, Synchronous force-bearing block; 284, Switch actuator; 285, Snap-on edge; 286, Closure feedback element; 290, Stroke gear; 300, Drive actuator. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Refer to Figure 1 The diagram shows a mechanical key switch control structure for a smart lock on a glass door, comprising: a key mechanism including a key body 100 with physical teeth; a mechanical key switch mechanism 200 coupled to the key mechanism for converting the rotational motion of the key body 100 into a first stroke signal; an authentication and detection mechanism located inside the mechanical key switch mechanism 200, the authentication and detection mechanism including a stroke detection structure for detecting the first stroke signal; and a control execution structure for generating a valid unlocking control signal and driving the actuator 300 to operate only when a first stroke signal meeting preset legal conditions is simultaneously received.

[0021] More specifically, according to Figure 1 - Figure 3 As shown, the mechanical key switch mechanism 200 includes: a key core 220 for receiving the rotational torque of the key body 100; a transmission stroke structure sleeved on the key core 220, the transmission stroke structure including a synchronous gear 230 sleeved on the outside of the key core 220 and a U-shaped gear 240 meshing with the synchronous gear 230; and a U-shaped glass plate 210 for mounting the key core 220, the authentication and testing mechanism, and the control execution structure, the bottom of the U-shaped glass plate 210 having a stroke groove 250, the stroke groove 250 being used to convert the rotational motion of the synchronous gear 230 into a second stroke signal for the linear motion of the U-shaped gear 240. The other end of the U-shaped gear 240 is synchronously meshed with a stroke gear 290. The U-shaped gear 240 is used to convert the rotation of the stroke gear 290 into a third stroke signal. The side end of the stroke gear 290 is coaxially provided with a control component 260 and a switch transmission component 270. The switch transmission component 270 is synchronously driven by the third stroke signal of the stroke gear 290 to drive the execution switch component 280 connected at its end.

[0022] First, the user inserts the key body 100 into the lock cylinder. When the user begins to rotate the key, the physical teeth of the key interact with the tumbler structure inside the lock cylinder, completing mechanical decryption while transmitting rotational torque to the key core 220 fixed to it. The key core 220, as the initial input shaft of the entire mechanism, begins to rotate synchronously. Next, the synchronous gear 230, fitted around the key core 220, rotates accordingly. The synchronous gear 230 meshes with the rack portion on one side of the U-shaped gear 240. Therefore, the rotational motion of the synchronous gear 230 is directly converted into the linear motion of the U-shaped gear 240. The U-shaped gear 240 is constrained within the stroke groove 250 at the bottom of the U-shaped glass clamp 210, ensuring that it can only slide precisely along a preset trajectory. This process of converting rotation into linear motion is the second stroke signal, i.e., a linear displacement that is strictly proportional to the key's rotation angle.

[0023] Subsequently, when the U-shaped gear 240 performs linear motion, the rack on its other end drives the stroke gear 290, which meshes with it, to rotate. In this way, the linear motion is converted back into rotational motion, but the axis of motion has shifted from the initial key core 220. This is the third stroke signal, a rotational signal after two stages of transmission.

[0024] Next, the control component 260 and the switch transmission component 270, which are coaxially arranged with the stroke gear 290, begin to work synchronously. The rotation of the stroke gear 290 will drive these two components simultaneously.

[0025] For the switch drive assembly 270, as the next link in the power transmission, it continues to transmit the rotational power of the travel gear 290 backward.

[0026] Then, the switch transmission assembly 270 transmits the received rotational motion to the end-connected actuator switch assembly 280. The actuator switch assembly 280 is a switch. When the transmitted motion reaches a predetermined position, the actuator switch assembly 280 is triggered, and its internal contacts change state, for example, from open to closed, thereby generating a clear electrical signal.

[0027] Finally, the electrical signal generated by the actuator switch assembly 280 is transmitted to the control actuator. The control actuator performs a logical comparison of this signal with the feedback signal sent by the certification and testing agency. Only if it is verified as valid will the control actuator issue the final unlocking command to the drive actuator 300 to complete the unlocking action.

[0028] Preferred, according to Figure 3 As shown, the switch transmission assembly 270 includes a transmission gear 271 and a rotating handle 272, which are coaxially arranged. The rotating handle 272 is used to receive the rotational torque of the stroke gear 290.

[0029] When the stroke gear 290 rotates under the drive of the U-shaped gear 240, the stroke gear 290, acting as the driving gear, transmits rotational power to the transmission gear 271. Since the transmission gear 271 and the rotating handle 272 are coaxially fixedly connected (e.g., by keyway or integral molding), the rotation of the transmission gear 271 will drive the rotating handle 272 to rotate synchronously without delay and coaxially. This means that the magnitude and direction of the rotational torque received by the rotating handle 272 are determined by the transmission gear 271, while its rotational angle and speed are completely consistent with those of the transmission gear 271; or, the magnitude and direction of the rotational torque received by the transmission gear 271 are determined by the rotating handle 272.

[0030] Subsequently, the rotating lever 272 transforms from a stationary rod into a continuously rotating power output shaft. Its rotational motion directly acts on the actuator switch assembly 280 connected to or in contact with its end. During rotation, the lever extending from the rotating lever 272 gradually approaches and eventually contacts the actuator switch assembly 280.

[0031] Next, as the rotating handle 272 continues to rotate at a preset angle, it gradually applies pressure to the actuating switch assembly 280 from initial contact, pushing the structure within the actuating switch assembly 280 to displacement. This displacement process continues until a critical change occurs in the internal state of the actuating switch assembly 280.

[0032] Then, when the rotating lever 272 is rotated to a precise predetermined angle position, the applied force or the displacement pushed just reaches the action threshold of the actuating switch assembly 280. At this time, the actuating switch assembly 280 is reliably triggered, and its internal electrical state changes instantaneously. For example, the closing feedback element 286 of the switch actuator 284 changes from normally open to closed, or from normally closed to open, thereby generating a clear switch-triggered electrical signal.

[0033] Finally, this electrical signal is immediately transmitted to the overall control execution structure as one of the key confirmation signals that the physical key operation has been completed and reached the correct position.

[0034] Preferred, according to Figure 4As shown, the actuator switch assembly 280 is a position switch that can be triggered by rotating the lever 272. The actuator switch assembly 280 includes: a force-receiving slide 281, which receives the rotation of the lever 272 and slides along the surface of the internally slidably connected slot 282; a synchronous force-receiving block 283, which is installed at the bottom of the force-receiving slide 281. Switch actuators 284 are symmetrically rotatably connected to both ends of the side surface of the synchronous force-receiving block 283 along its central axis. A snap-fit ​​edge 285 is installed at the end of the switch actuator 284, and a closing feedback element 286 is installed on the side wall surface of the switch actuator 284. The closing feedback element 286 is signal-connected to the authentication and testing mechanism. When the lever 272 of the switch transmission assembly 270 rotates under the drive of the preceding transmission, its toggle block begins to contact the force-receiving slide 281 of the actuator switch assembly 280. The continuous rotational motion of the lever 272 is converted into a continuous pushing or pressing force on the force-receiving slide 281.

[0035] Next, under the action of this external force, the force-bearing slider 281 begins to slide precisely in a straight line along the surface of the internally slidably connected slot 282. The slot 282 provides guidance and trajectory constraints for the force-bearing slider 281, ensuring that its sliding path is fixed and does not deviate or jam.

[0036] Subsequently, since the synchronizing force block 283 is fixedly installed at the bottom of the force-bearing slide 281, it moves along with the force-bearing slide 281. The movement of the synchronizing force block 283 directly changes the initial position and force balance of the switch actuators 284 symmetrically rotated and connected to its two sides. As the displacement of the synchronizing force block 283 reaches a preset critical point, it causes the two switch actuators 284, like the arms of scissors or pliers, to overcome their own resistance or the preload of the small torsion springs and begin to rotate symmetrically in opposite directions around their connection point with the synchronizing force block 283. The symmetrically rotating switch actuators 284 cause the latching edges 285 at their ends to displace. These latching edges 285 are designed to cooperate with corresponding slots or fixing structures inside the lock body. When the switch actuators 284 rotate to a specific angle, the latching edges 285 slide into, engage with, or disengage from the target structure, thereby completing a mechanical locking or unlocking state switch.

[0037] Finally, the closure feedback element 286, typically a miniature position sensor, installed on the side wall surface of the switch actuator 284, detects that the switch actuator 284 has reached the preset final position (such as fully closed or fully open). At this time, the electrical state of the closure feedback element 286 itself changes (such as from open to closed), and immediately sends this status signal indicating that the mechanical action has been completed to the authentication and testing agency connected to it, as the final confirmation signal that the entire mechanical key operation sequence has been successfully completed.

[0038] Example 2, as a further preferred embodiment, according to Figure 5 - Figure 6 As shown, the control component 260 includes an asymmetrical cam 261 coaxially arranged with a stroke gear 290. The asymmetrical cam 261 has a smooth working area and a steep limiting area. A contact wheel 263 is slidably connected to the side end of the asymmetrical cam 261. A force-bearing buffer rod 264 is sleeved on the side end of the contact wheel 263. A transmission component 265 is connected to the side end of the force-bearing buffer rod 264. A limiting shell 2690 is sleeved on the outside of the transmission component 265. The transmission component 265 is rotatably connected to the outside of the top rotating column of the limiting shell 2690. The control component 260 further includes: a pawl 268 for receiving the rotational torque of the transmission component 265; a ratchet 269 for receiving the rotational torque of the pawl 268; the pawl 268 and the ratchet 269 rotate on the inner wall surface of the limiting shell 2690 respectively; an angle sensor 2691 is installed on the side end of the ratchet 269, a pressure sensor 267 is installed on the inner wall surface of the limiting shell 2690, a contact spring 2692 and a feedback component 2693 for feeding back the pressure of the contact spring 2692 and electrically connected to the pressure sensor 267 are respectively installed on the side end of the pressure sensor 267, and the side end of the contact spring 2692 is connected to the outer surface of the pawl 268. The stroke detection structure consists of an angle sensor 2691 and a pressure sensor 267. The stroke detection structure is linked with the key core 220 and the transmission stroke structure to detect the rotation angle or linear displacement in real time to generate a stroke signal. When the key body 100 rotates to the first preset angle, the U-shaped gear 240 moves at a constant speed. When the rotation angle exceeds the first preset angle, the profile of the asymmetrical cam 261 changes from the smooth working area to the steep limit area, the cam lift increases sharply, and the contact wheel 263 is suddenly lifted. This impact force is transmitted in reverse through the force buffer rod 264, the transmission component 265, and the pawl component 268 to the ratchet component 269 and the stroke gear 290, thereby blocking the linear motion of the U-shaped gear 240 and realizing the mechanical interruption of the transmission chain.

[0039] The aforementioned process of obstructing the movement of the U-shaped gear 240 and triggering the self-locking of the ratchet 269 and pawl 268 is detailed as follows: when a violent prying or abnormal rotation occurs, such as when the rotational angular velocity exceeds a preset threshold or the rotational angle exceeds the legal stroke range, the profile of the asymmetrical cam 261 shifts from the smooth working area to the steep limiting area, the cam lift increases sharply, and the contact wheel 263 is abruptly lifted, applying an impact torque far exceeding the normal value to the transmission component 265 through the force-bearing buffer rod 264. The resulting impact torque is transmitted to the pawl 268 through the transmission component 265, causing the pawl 268 to strike the ratchet 269 with abnormal speed and force. During this process, the teeth of the pawl 268 and the tooth groove of the ratchet 269 engage abnormally under high-speed and high-force impact, or the relative motion is locked due to a sudden increase in the coefficient of friction, thereby interrupting the transmission chain; at the same time, the pressure sensor 267 detects that the pressure value momentarily exceeds the legal threshold through the contact spring 2692 and the feedback device 2693, and the angle sensor 2691 detects that the rotation of the ratchet 269 stops abruptly or vibrates, and the two together output an abnormal signal to the control actuator.

[0040] When the user rotates the key normally, torque is transmitted through the stroke gear 290 to the asymmetrical cam 261, which is fixed coaxially with it. The asymmetrical cam 261 begins to rotate, and its smooth working area remains in contact with the contact wheel 263. Due to the gradual change in lift, the contact wheel 263 produces a smooth oscillation or rolling motion.

[0041] Next, the movement of the contact wheel 263 is transmitted to the transmission component 265 via the force-bearing buffer rod 264. The transmission component 265 rotates on the rotating column at the top of the limiting housing 2690, transmitting torque to the pawl component 268 connected thereto. Under normal operating force, the pawl component 268 overcomes the slight resistance applied by the contact spring 2692, smoothly pushing the ratchet component 269 to rotate. The rotation of the ratchet component 269 is detected in real time by the angle sensor 2691 at its side end, generating a signal corresponding to the rotation angle. At the same time, the pressure generated by the compression of the contact spring 2692 is transmitted to the pressure sensor 267 through the feedback component 2693, and the pressure sensor 267 outputs a stable electrical signal proportional to the operating force. At this time, the angle sensor 2691 and the pressure sensor 267 together constitute a stroke detection structure, and the output signals together form a smooth, legal operating stroke within the preset force range.

[0042] Next, when a forced lock is pried open or abnormal rotation occurs, such as when the rotation angle exceeds a first preset angle, like 30°, the situation changes. The profile of the asymmetric cam 261 shifts from the smooth working area to the steep limiting area. At this time, the cam lift increases sharply. Due to the geometry of the steep limiting area, the contact wheel 263 is suddenly lifted, causing the force-bearing buffer rod 264 and the transmission component 265 to experience a sudden, much higher than normal impact force. This sudden force acts violently on the pawl 268 through the transmission component 265. Simultaneously, the resulting sudden force transmits a huge resistance in the opposite direction to the stroke gear 290 through the force-bearing buffer rod 264 and the transmission component 265, thereby hindering the movement of the entire transmission chain.

[0043] Finally, the abnormally large force causes the pawl 268 to drive the ratchet 269 at high speed. However, due to the characteristics of the ratchet-pawl mechanism, this impact can easily cause the teeth of the pawl 268 and ratchet 269 to jam or slip, thereby triggering mechanical self-locking and instantly locking the transmission chain at this point. At the same time, the pressure sensor 267 will detect a sharp increase in pressure transmitted through the contact spring 2692 and feedback element 2693, far exceeding the normal threshold, and will immediately send an alarm signal of violent operation to the control execution structure. Even if self-locking does not occur completely, the angle sensor 2691 can detect an abnormal stop or jitter in the rotation of the ratchet 269, further confirming the abnormal state.

[0044] The control component 260 and the switch transmission component 270, which are coaxially arranged with the stroke gear 290, begin to work synchronously. The rotation of the stroke gear 290 drives both components simultaneously.

[0045] The internal mechanism of the control component 260 begins to operate, enabling it to monitor the force on the transmission chain in real time. If abnormal resistance, such as forceful prying, is encountered during key rotation, the control component 260 can sensitively detect it and feed back the abnormal state to the control actuator via an electrical signal.

[0046] It should be noted that when the key body 100 rotates, the real-time rotation angle of the key core 220 and its change over time form the first stroke signal, which can be obtained by the angle detection sensor embedded in the side of the key core 220. The linear displacement and speed generated by the synchronous gear 230 driving the U-shaped gear 240 form the second stroke signal, which is obtained by the displacement sensor installed on one side of the stroke groove 250. The angle and time changes generated by the rotation of the stroke gear 290 driven by the U-shaped gear 240 form the third stroke signal, which is then collected by the angle sensor 2691 and pressure sensor 267 in the control component 260. Ultimately, the stroke signal received by the control actuator and used for legality comparison is a combination of angle and time changes and pressure and time changes in the third stroke signal. That is, the combination of features generated by the mechanical action of the key turning during the entire unlocking process for authentication is formed by the key tooth shape, the profile of the asymmetrical cam 261, the preload of the contact spring 2692, and the resistance of the transmission chain. The whole is unique and difficult to bypass.

[0047] Preferred, according to Figure 1 As shown, the control actuator includes a main control chip. The main control chip is used to compare the stroke signal with the pre-stored legal stroke, determine whether the stroke trajectory and the endpoint value both meet the expectations, and trigger the drive actuator 300. The drive actuator 300 is at least one of a micro motor or a piezoelectric ceramic actuator. Under normal conditions, the output end of the drive actuator 300 extends out and is a rod, forming a limit pin state structure to lock the transmission path of the ratchet 269 and the pawl 268. Only when a valid unlocking control signal is received, the drive actuator 300 retracts and unlocks.

[0048] The control and actuator mechanism is integrated into the ultra-thin lock body of the glass door smart lock, working in conjunction with the mechanical key switch mechanism 200 and the certification and testing mechanism, sharing the single rotary input of the key mechanism. The control and actuator mechanism mainly includes a main control chip and a drive actuator 300, wherein the drive actuator 300 adopts at least one of a micro motor or a piezoelectric ceramic actuator.

[0049] Under normal conditions, the output end of the actuator 300 remains extended, locking the final transmission path between the actuator switch assembly 280 and the actuator 300. When the user inserts the key body 100 into the lock cylinder, the physical teeth of the key and the tumbler structure inside the lock cylinder complete the mechanical decryption match. At this time, the key core 220 is in the initial zero position, and the actuator 300 remains extended and locked.

[0050] Next, the user begins to rotate the key body 100. When the rotation angle is within a first preset angle range (e.g., 0° to 15°), the key core 220 drives the synchronous gear 230 to rotate. The synchronous gear 230 drives the U-shaped gear 240 to move linearly along the stroke groove 250. This linear motion drives the stroke gear 290 to rotate at a small angle. The stroke detection structure (including the angle sensor 2691 and the pressure sensor 267) collects the stroke signal (including rotation angle, linear displacement, pressure change, and time parameters) within this small angle range in real time and transmits the signal to the main control chip.

[0051] Subsequently, the main control chip compares the acquired initial stroke signal with the pre-stored valid stroke template. If the comparison result meets the preset valid conditions, including the rotation angle change law, the pressure change curve over time, the displacement endpoint value, and the timing coordination relationship of each signal all being within the allowable error range, the main control chip immediately generates a valid unlocking control signal and sends it to the drive actuator 300. After receiving the unlocking signal, the drive actuator 300 retracts its output rod from the extended state, releasing the lock on the transmission path of the ratchet 269 and the pawl 268.

[0052] Next, the user continues to rotate the key body 100 until its rotation angle exceeds the first preset angle (e.g., more than 15°). At this time, since the transmission path has been unlocked, the rotational torque of the key core 220 can be fully transmitted to the stroke gear 290, the switch transmission assembly 270, and the execution switch assembly 280, ultimately triggering the execution switch assembly 280 to generate an unlocking electrical signal, thus completing the unlocking action.

[0053] If the main control chip determines that the initial stroke signal is invalid, such as exceeding the rotation angle limit, abnormal pressure change, or the trajectory not matching the preset template, it will not generate an unlocking control signal, and the actuator 300 will remain in its normally extended state, with the transmission path continuously locked. At this time, even if the user continues to rotate the key, because the ratchet 269 and pawl 268 are locked, the rotational torque of the key core 220 cannot be transmitted to the actuator switch assembly 280, and the key will not be able to complete the unlocking action. Simultaneously, the main control chip can trigger an alarm device, such as a buzzer or wireless alarm signal, to indicate abnormal operation.

[0054] The overall structure is integrated into the ultra-thin lock body of the glass door smart lock, in which the mechanical key switch mechanism 200 shares a single rotary input of the key mechanism with the certification and testing agency.

[0055] It should be further noted that a mounting groove is formed on the side surface of the key core 220, and a first angle detection sensor is embedded in the mounting groove. The first angle detection sensor is a non-contact magnetic encoder or photoelectric encoder. When the key core 220 rotates, the non-contact magnetic encoder or photoelectric encoder detects the change in magnetic field angle or grating pulse signal, thereby generating a first stroke signal corresponding to the rotation angle and angular velocity of the key core 220.

[0056] A sensor mounting groove is formed along the length of one side wall of the stroke groove 250, and a linear displacement sensor is fixedly installed in the groove. The linear displacement sensor is a magnetostrictive displacement sensor or a resistive displacement sensor. When the U-shaped gear 240 moves linearly along the stroke groove 250, the magnetostrictive displacement sensor or the resistive displacement sensor detects the change in resistance value in real time, thereby generating a second stroke signal corresponding to the linear displacement and moving speed of the U-shaped gear 240.

[0057] The third stroke signal is acquired collaboratively by the angle sensor 2691 and the pressure sensor 267 inside the control component 260. The angle sensor 2691 is fixedly installed on the inner wall surface of the limiting housing 2690, with its detection end opposite to the rotating shaft end of the ratchet component 269. It employs a non-contact Hall sensor or magnetic encoder to detect the rotation angle and angular velocity of the ratchet component 269 in real time. The pressure sensor 267 is fixedly installed on the inner wall surface of the limiting housing 2690, with its detection end connected to the outer surface of the pawl component 268 via a contact spring 2692 and a feedback component 2693. It is used to detect the pressure value and pressure change curve generated during the engagement of the pawl component 268 and the ratchet component 269 in real time. The angle sensor 2691 and the pressure sensor 267 together constitute the acquisition module for the third stroke signal. The acquired data is fused to form a combined characteristic signal containing angle, pressure, and time parameters.

[0058] The actuator 300 employs a dual-control mode micro motor (such as a bidirectional stepper motor or servo motor). When the main control chip determines that unlocking is required, it sends a forward drive signal, causing the motor to rotate forward and retract the output rod. After unlocking is complete and the key body 100 is removed, the main control chip detects the key removal signal. If the key insertion status is detected by a microswitch or photoelectric sensor installed in the lock cylinder, it then sends a reverse drive signal, causing the motor to rotate in the reverse direction and extend the output rod, restoring the normal locked state.

[0059] Furthermore, the entire system can be powered by a lithium battery pack or an electronic power supply, and a Type-C or Micro-USB emergency power supply interface is provided in a concealed location on the lock body, such as the bottom or side.

[0060] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mechanical key switch control structure for a smart lock on a glass door, characterized in that, include: A key mechanism, the key mechanism comprising a key body (100) with physical teeth. A mechanical key switch mechanism (200), coupled to a key mechanism, is used to convert the rotational motion of the key body (100) into a first stroke signal; The certification and testing organization is installed inside the mechanical key switch mechanism (200), and the certification and testing organization includes a stroke detection structure for detecting a first stroke signal; The control execution structure is used to generate a valid unlock control signal and control the drive actuator (300) to operate only when a first stroke signal that meets the preset legal conditions is received simultaneously.

2. The mechanical key switch control structure for a smart glass door lock according to claim 1, characterized in that: The mechanical key switch mechanism (200) includes: The key core (220) is used to receive the rotational torque of the key body (100); The transmission stroke structure is sleeved on the key core (220). The transmission stroke structure includes a synchronous gear (230) sleeved on the outside of the key core (220) and a U-shaped gear (240) meshing with the synchronous gear (230). U-shaped glass clamp (210) is used to install key core (220), certification and testing mechanism and control execution structure. The bottom of the U-shaped glass clamp (210) is provided with a stroke groove (250). The stroke groove (250) is used to convert the rotational motion of the synchronous gear (230) into the second stroke signal of the linear motion of the U-shaped gear (240).

3. The mechanical key switch control structure for a smart glass door lock according to claim 2, characterized in that: The other end of the U-shaped gear (240) is synchronously meshed with a stroke gear (290). The U-shaped gear (240) is used to convert the rotation of the stroke gear (290) into a third stroke signal. The side end of the stroke gear (290) is coaxially provided with a control component (260) and a switch transmission component (270). The switch transmission component (270) is synchronously driven by the third stroke signal of the stroke gear (290) to drive the execution switch component (280) connected at its end.

4. The mechanical key switch control structure for a smart glass door lock according to claim 3, characterized in that: The control component (260) includes an asymmetrical cam (261) coaxially arranged with a stroke gear (290). The asymmetrical cam (261) has a smooth working area and a steep limiting area. A contact wheel (263) is slidably connected to the side end of the asymmetrical cam (261). A force-bearing buffer rod (264) is sleeved on the side end of the contact wheel (263). A transmission component (265) is connected to the side end of the force-bearing buffer rod (264). A frame (262) is installed on the outside of the force-bearing buffer rod (264). A limiting shell (2690) is sleeved on the outside of the transmission component (265). The transmission component (265) is rotatably connected to the outside of the top rotating column of the limiting shell (2690).

5. The mechanical key switch control structure for a smart glass door lock according to claim 3, characterized in that: The prevention and control component (260) further includes: A pawl (268) is used to receive the rotational torque of the transmission component (265); Ratchet (269) is used to receive the rotational torque of pawl (268); The pawl (268) and ratchet (269) rotate on the inner wall surface of the limiting shell (2690), respectively. An angle sensor (2691) is installed on the side end of the ratchet (269), and a pressure sensor (267) is installed on the inner wall surface of the limiting shell (2690). A contact spring (2692) and a feedback element (2693) for feeding back the pressure of the contact spring (2692) and electrically connected to the pressure sensor (267) are respectively installed on the side end of the pressure sensor (2692). The side end of the contact spring (2692) is connected to the outer surface of the pawl (268).

6. The mechanical key switch control structure for a smart glass door lock according to claim 1, characterized in that: The stroke detection structure is composed of an angle sensor (2691) and a pressure sensor (267). The stroke detection structure is linked with the key core (220) and the transmission stroke structure to detect the rotation angle or linear displacement in real time to generate a stroke signal. When the key body (100) rotates to the first preset angle, the U-shaped gear (240) moves at a constant speed. When the rotation angle exceeds the first preset angle, the lift of the asymmetric cam (261) profile increases sharply, which obstructs the movement of the U-shaped gear (240) and triggers the self-locking of the ratchet (269) and the pawl (268).

7. The mechanical key switch control structure for a smart glass door lock according to claim 3, characterized in that: The switch transmission assembly (270) includes a transmission gear (271) and a rotating handle (272), which are coaxially arranged. The rotating handle (272) is used to receive the rotational torque of the stroke gear (290).

8. The mechanical key switch control structure for a smart glass door lock according to claim 3, characterized in that: The actuator switch assembly (280) is a position switch that can be triggered by rotating the lever (272), and the actuator switch assembly (280) includes: Force-bearing slide (281), which is used to support the rotation of the rotating handle (272) and slide along the surface of the internally slidingly connected slot frame (282); A synchronous force-bearing block (283) is installed at the bottom of the force-bearing slide (281). The two ends of the side surface of the synchronous force-bearing block (283) are symmetrically connected to a switch actuator (284) along its central axis. The end of the switch actuator (284) is provided with a snap-fit ​​edge (285). The side wall surface of the switch actuator (284) is provided with a closing feedback element (286). The closing feedback element (286) is connected to the certification and testing agency via signal.

9. The mechanical key switch control structure for a smart glass door lock according to claim 8, characterized in that: The control actuator includes a main control chip, which is used to compare the stroke signal with the pre-stored legal stroke, determine whether the stroke trajectory and the endpoint value both meet the expectations, and trigger the drive actuator (300). The drive actuator (300) is at least one of a micro motor or a piezoelectric ceramic brake.

10. The mechanical key switch control structure for a smart glass door lock according to claim 1, characterized in that: The drive actuator (300) extends its output end under normal conditions to lock the transmission path of the ratchet (269) and pawl (268). The drive actuator (300) retracts to release the lock only when a valid unlocking control signal is received.

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