A clutch applied to a full-automatic lock

Abstract

The application relates to a clutch applied to a full-automatic lock, which comprises a shell, a motor arranged in the shell, an NFC assembly, a square rod rotating wheel, a handle rotating disc, a handle rotating wheel, a pin rod and a reset mechanism, the square rod rotating wheel and the handle rotating wheel are mutually engaged, the diameter of the square rod rotating wheel is smaller than that of the handle rotating wheel, the NFC assembly is connected with the motor and has a power supply state of supplying power to the motor, the motor drives the pin rod to move and forms linkage of the handle rotating disc and the handle rotating wheel, and the reset mechanism drives the pin rod to move reversely and releases the linkage of the handle rotating disc and the handle rotating wheel.

Description

TECHNICAL FIELD

[0001] The present application relates to a clutch, in particular to a clutch applied to a full-automatic lock. BACKGROUND

[0002] With the rapid development of Internet of Things and smart home technology, full-automatic smart door locks are widely used due to their convenience, safety and high degree of intelligence. Such door locks usually control the extension and retraction of the lock tongue directly through a motor or an electromagnetic driving mechanism to realize the automatic operation of "one-key unlocking and locking when closing the door". Users can trigger the unlocking instruction through various authentication methods such as password, fingerprint, smart phone application or bracelet, greatly improving the user experience.

[0003] Under normal power supply conditions, the full-automatic lock operates well, however, its high dependence on electric energy also brings a significant technical pain point: when the battery runs out or the power supply system fails, the door lock will not be automatically opened due to the loss of power, resulting in users being locked out, which poses a serious emergency safety hazard.

[0004] In some existing improvement schemes, a clutch is provided in the handle part of the full-automatic lock. After the electronic system fails, the key is inserted into the lock cylinder to complete the linkage of the handle and the square rod, so that the square rod can be controlled by the handle. However, this scheme still has the following defects: the handle rotation angle required to drive the square rod to complete the entire unlocking action is still large, resulting in a long effective rotation stroke of the handle. Since this emergency handle function is only used in the extreme case of electronic system failure, it is a kind of low-frequency use of the clutch applied to the full-automatic lock. Therefore, a large operation space is reserved around the handle for long-stroke rotation, which is idle most of the time during the normal use cycle of the lock, causing a contradiction between product structure layout and space utilization efficiency, which is not conducive to the compact design of the lock structure and also limits its installation application scenarios to some extent. Another defect is that a key needs to be carried additionally, which may not be nearby when it is really needed, causing inconvenience. SUMMARY

[0005] In view of the deficiencies in the prior art, the purpose of the present application is to provide a clutch applied to a full-automatic lock.

[0006] To achieve the above object, the present application provides the following technical solutions: including a shell, a motor, an NFC component, a square rod rotating wheel, a handle rotating disc, a handle rotating wheel, a pin rod, a reset mechanism arranged in the shell, the square rod rotating wheel and the handle rotating wheel are engaged with each other and the diameter of the square rod rotating wheel is smaller than that of the handle rotating wheel, the NFC component is connected with the motor and has a power supply state for supplying power to the motor, the motor drives the pin rod to move and constitutes linkage of the handle rotating disc and the handle rotating wheel, the reset mechanism drives the pin rod to move reversely and releases the linkage of the handle rotating disc and the handle rotating wheel, the handle rotating disc is connected with a handle outside the shell, and the square rod rotating wheel is connected with a square rod of a full-automatic lock; the NFC component includes an NFC chip, an antenna coil matched with the NFC chip, and a peripheral circuit, and its working principle is that when the full-automatic lock loses power and cannot work normally, a user approaches a mobile phone with NFC function to an NFC induction area of the full-automatic lock, the NFC component obtains weak energy from an external device through electromagnetic induction, which is enough to activate the internal NFC chip to enter a working state, complete reading and authentication of identity information, and after the authentication is passed, the NFC chip sends a low-power trigger signal to a control circuit connected therewith, the control circuit immediately connects an independent emergency power supply circuit composed of an energy storage element to release the stored energy to the motor, so as to drive the motor to complete a specified action.

[0007] By adopting the above technical solutions, when the NFC component receives an external signal, it enters a power supply state to drive the motor to work; the motor pushes the pin rod to move, so that the handle rotating disc and the handle rotating wheel are connected through the pin rod to realize linkage, at this time, rotating the handle can drive the square rod rotating wheel to rotate, since the diameter of the square rod rotating wheel is smaller than that of the handle rotating wheel, a speed reduction transmission ratio is formed to reduce the handle rotation angle; when it is necessary to release the linkage, the reset mechanism drives the pin rod to move reversely to disconnect the handle rotating disc and the handle rotating wheel; the NFC power supply avoids the inconvenience of carrying a key and improves the convenience of emergency unlocking; at the same time, the gear diameter difference is used to reduce the effective handle rotation stroke, save operation space, make the lock structure more compact, and solve the problem of space waste caused by long stroke rotation in the background art.

[0008] The present application is further provided with: the handle rotating wheel is provided with a pin through hole for the pin rod to slide, the handle rotating disc is provided with a pin groove opposite to the pin through hole, and the pin rod has a linkage position located in the pin through hole and the pin groove to constitute linkage of the handle rotating disc and the square rod rotating wheel.

[0009] By adopting the above technical scheme, the pin rod can slide in the pin through hole of the handle rotating wheel, when the pin rod is inserted into the pin slot of the handle rotating disc simultaneously by the motor driving, the pin rod is in the linkage position, the handle rotating disc is fixedly connected with the handle rotating wheel, and rotating the handle can drive the square rod rotating wheel to rotate through the pin rod transmitting torque; when the pin rod exits the pin slot, the linkage is released; through the simple cooperation of the pin rod, the pin through hole and the pin slot, reliable mechanical linkage and disconnection are realized, the structure is stable and responds quickly, and efficient connection of the handle and the square rod in an emergency state is ensured.

[0010] The present application is further provided that: it further comprises a torsion spring, a clamping rod and a top plate, the top plate is located below the handle rotating wheel and abuts against the pin rod, the motor drives the clamping rod to rotate, the torsion spring has one end clamped to the clamping rod and the other end located in the top plate and constituting the working state of the motor driving the pin rod in the vertical direction.

[0011] By adopting the above technical scheme, the motor drives the clamping rod to rotate, drives one end of the torsion spring to move, and the other end of the torsion spring abuts against the top plate; since the top plate contacts the pin rod, the torsion spring deforms to produce a lever effect, pushes the top plate to move upward, and thus drives the pin rod to move in the vertical direction to the linkage position; the lever principle of the torsion spring is used to convert the rotary motion of the motor into the linear motion of the pin rod, the transmission efficiency is high, the load of the motor is reduced, and the response speed and reliability of the clutch are improved.

[0012] The present application is further provided that: the reset mechanism comprises a reset block, a spring and a pressing block, the shell is provided with a communication hole, the spring is arranged in the shell and drives the reset block to move along the communication hole, the pressing block is arranged outside the shell and has a pressing state of pressing the reset block into the shell, the center of the torsion spring is arranged on the reset block and moves with the reset block, when the pressing block is in the pressing state, the torsion spring is separated from the clamping rod and the top plate, and when the pressing block is not in the pressing state, the torsion spring abuts against the clamping rod and the top plate, that is, the position of the reset block is taken as the center of the lever, and the two ends of the torsion spring are taken as the two ends of the lever, when the motor works, one end of the torsion spring clamped with the clamping rod moves downward, at this time, the other end abuts against the top plate, and thus moves upward to complete the vertical driving of the pin rod.

[0013] By adopting the above technical scheme, in the reset mechanism, the spring drives the reset block to move outward to make the torsion spring contact the clamping rod and the top plate; when the pressing block is pressed, the reset block compresses the spring to move inward, the torsion spring is separated from the clamping rod and the top plate, and the driving of the pin rod is released; when the motor works, the torsion spring takes the reset block as a fulcrum, one end is pulled down by the clamping rod, and the other end lifts the top plate to push the pin rod upward to complete the linkage; the pressing block is manually pressed to realize quick reset, the linkage can be reliably released in an emergency, the safety and adaptability of the clutch are improved; at the same time, the lever optimizes power transmission and reduces energy loss.

[0014] The application is further provided with a lock core at the bottom of the shell, a key hole at the bottom of the lock core, a rotating slope at the top of the lock core, and a matching slope at the bottom of the top plate.

[0015] By adopting the above technical scheme, when the electronic system fails, the lock can be opened by inserting the key into the key hole of the lock core and rotating the lock core, the rotating slope at the top of the lock core interacts with the matching slope at the bottom of the top plate, the top plate is pushed to move upward, and then the pin rod is driven to the linkage position, realizing the mechanical linkage of the handle and the square rod.

[0016] The application is further provided with an arc-shaped top plate matched with the shape of the handle rotating wheel.

[0017] By adopting the above technical scheme, the top plate is designed to be arc-shaped and matched with the shape of the handle rotating wheel, ensuring that the top plate and the handle rotating wheel maintain uniform contact during the driving process of the pin rod, and the force is stably transmitted.

[0018] The application is further provided with a rotating groove at the center of the handle rotating wheel for the rotation of the handle rotating disc.

[0019] By adopting the above technical scheme, the handle rotating disc is installed in the rotating groove at the center of the handle rotating wheel and can rotate relatively; when the pin rod is in the linkage position, the handle rotating disc and the handle rotating wheel are fixed through the rotating groove and the pin rod, realizing synchronous rotation; the design of the rotating groove reduces the space occupation between components, making the overall structure of the clutch more compact and facilitating installation in various locks, and improving the space utilization.

[0020] The application is further provided with a linkage block on the handle rotating disc, and a pressing block rotatingly arranged on the linkage block and located outside the shell, the pressing block having a driving state for driving the handle rotating disc to rotate.

[0021] By adopting the above technical scheme, when needed, the pressing block is first lifted to release the pressing of the reset block, and then the pressing block is rotated to drive the handle rotating disc after the NFC component is inducted, that is, the pressing block has the pressing function of pressing the reset block and the rotating function of the handle rotating disc. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the whole application;

[0023] Figure 2 It is a structural schematic diagram of the shell inside the application;

[0024] Figure 3 This is an exploded view of the handle turntable, handle wheel, and pin of the present invention;

[0025] Figure 4 This is a schematic diagram of the lock cylinder of the present invention.

[0026] In the diagram: 1. Housing; 11. Connecting hole; 2. Motor; 3. NFC component; 4. Square rod wheel; 5. Handle turntable; 51. Pin groove; 52. Linkage block; 6. Handle turntable; 61. Pin hole; 62. Rotating groove; 7. Pin rod; 71. Torsion spring; 72. Locking rod; 73. Top plate; 8. Reset mechanism; 81. Reset block; 82. Spring; 83. Pressure block; 9. Lock cylinder; 91. Keyhole; 92. Rotating inclined surface; 93. Mating inclined surface. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] like Figures 1-4As shown, this invention discloses a clutch for a fully automatic lock, including a housing 1 and a motor 2, an NFC component 3, a square rod wheel 4, a handle disc 5, a handle wheel 6, a pin 7, and a reset mechanism 8 disposed within the housing 1. The square rod wheel 4 and the handle wheel 6 mesh with each other, and the diameter of the square rod wheel 4 is smaller than the diameter of the handle wheel 6. The NFC component 3 is connected to the motor 2 and has a power supply state to supply power to the motor 2. The motor 2 drives the pin 7 to move, thereby linking the handle disc 5 and the handle wheel 6. The reset mechanism 8 drives the pin 7 to move in the opposite direction and disengages the link between the handle disc 5 and the handle wheel 6. The NFC component 3 includes a chip, a reset switch, an energy storage capacitor, etc. Since the NFC component 3 is a very mature technology, it will not be described in detail. The handle disc 5 is connected to a handle outside the housing 1. The square rod wheel 4 is connected to the square rod of the automatic lock. When the NFC component 3 receives an external signal, it enters the power supply state and drives the motor 2 to work. The motor 2 pushes the pin 7 to move, so that the handle turntable 5 and the handle wheel 6 are linked through the pin 7. At this time, turning the handle can drive the square rod wheel 4 to rotate. Since the diameter of the square rod wheel 4 is smaller than that of the handle wheel 6, a reduction gear ratio is formed, reducing the rotation angle of the handle. When it is necessary to disengage the linkage, the reset mechanism 8 drives the pin 7 to move in the opposite direction, disconnecting the connection between the handle turntable 5 and the handle wheel 6. The NFC power supply avoids the inconvenience of carrying a key and improves the convenience of emergency unlocking. At the same time, the difference in gear diameter reduces the effective rotation stroke of the handle, saves operating space, makes the lock structure more compact, and solves the problem of space waste caused by long stroke rotation in the background technology.

[0030] The handle wheel 6 is provided with a through hole 61 for the pin rod 7 to slide through, and the handle disc 5 is provided with a groove 51 opposite to the through hole 61. The pin rod 7 is located in both the through hole 61 and the groove 51, forming a linkage position between the handle disc 5 and the square rod wheel 4. The pin rod 7 can slide in the through hole 61 of the handle wheel 6. When the motor 2 drives the pin rod 7 to move to the groove 51 of the handle disc 5, the pin rod 7 is in the linkage position, which fixes the handle disc 5 and the handle wheel 6. Rotating the handle can transmit torque through the pin rod 7 to drive the square rod wheel 4 to rotate. When the pin rod 7 exits the groove 51, the linkage is released. Through the simple cooperation of the pin rod 7 with the through hole 61 and the groove 51, reliable mechanical linkage and disconnection are achieved. The structure is stable and the response is rapid, ensuring efficient connection between the handle and the square rod in emergency situations.

[0031] It also includes a torsion spring 71, a locking rod 72, and a top plate 73. The top plate 73 is located below the handle wheel 6 and abuts against the pin 7. The motor 2 drives the locking rod 72 to rotate. The torsion spring 71 has one end engaged with the locking rod 72 and the other end located inside the top plate 73, forming a working state in which the motor 2 drives the pin 7 vertically. The motor 2 drives the locking rod 72 to rotate, causing one end of the torsion spring 71 to move, and the other end of the torsion spring 71 abuts against the top plate 73. Since the top plate 73 is in contact with the pin 7, the torsion spring 71 deforms and generates a lever effect, pushing the top plate 73 to move upward, thereby driving the pin 7 to move vertically to the linkage position. By using the lever principle of the torsion spring 71, the rotational motion of the motor 2 is converted into the linear motion of the pin 7, resulting in high transmission efficiency, reduced load on the motor 2, and improved response speed and reliability of the clutch.

[0032] The reset mechanism 8 includes a reset block 81, a spring 82, and a pressure block 83. A connecting hole 11 is provided on the housing 1. The spring 82 is located inside the housing 1 and drives the reset block 81 to move along the connecting hole 11. The pressure block 83 is located outside the housing 1 and has a pressing state that presses the reset block 81 into the housing 1. The torsion spring 71 is centered on the reset block 81 and moves with it. When the pressure block 83 is in the pressing state, the torsion spring 71 is separated from the locking rod 72 and the top plate 73. When the pressure block 83 is not in the pressing state, the torsion spring 71 abuts against the locking rod 72 and the top plate 73. That is, with the position of the reset block 81 as the lever center, the two ends of the torsion spring 71 are the two ends of the lever. When the motor 2 works, it drives the end of the torsion spring 71 that is engaged with the locking rod 72 to move downwards. When the other end abuts against the top plate 73, it moves upward, completing the vertical drive of the pin 7. In the reset mechanism 8, the spring 82 drives the reset block 81 to move outward, so that the torsion spring 71 contacts the engaging rod 72 and the top plate 73. When the pressure block 83 is pressed, the reset block 81 compresses the spring 82 and moves inward, and the torsion spring 71 separates from the engaging rod 72 and the top plate 73, releasing the drive of the pin 7. When the motor 2 is working, the torsion spring 71 uses the reset block 81 as a fulcrum, with one end pulled down by the engaging rod 72 and the other end lifting the top plate 73, pushing the pin 7 upward to complete the linkage. The manual pressure block 83 enables quick reset, ensuring reliable disengagement of the linkage in emergency situations, improving the safety and adaptability of the clutch. At the same time, the lever design optimizes power transmission and reduces energy loss.

[0033] A lock cylinder 9 is rotatably mounted at the bottom of the housing 1. A keyhole 91 is located at the bottom of the lock cylinder 9, and a rotating inclined surface 92 is located at the top of the lock cylinder 9. A mating inclined surface 93 adapted to the rotating inclined surface 92 is located at the bottom of the top plate 73. When the electronic system fails, the lock cylinder 9 can be rotated by inserting a key into the keyhole 91 of the lock cylinder 9. The rotating inclined surface 92 at the top of the lock cylinder 9 interacts with the mating inclined surface 93 at the bottom of the top plate 73, pushing the top plate 73 upward, thereby driving the pin 7 to the linkage position, realizing the mechanical linkage between the handle and the square rod. This provides a mechanical backup unlocking method, which can still be unlocked by key in case of power failure or NFC failure, enhancing the reliability and security of the product and solving the problem of reliance on the single electronic system in the background technology.

[0034] The top plate 73 is arc-shaped and matches the shape of the handle wheel 6. The arc-shaped design of the top plate 73 matches the shape of the handle wheel 6, ensuring that the top plate 73 and the handle wheel 6 maintain uniform contact during the driving process of the pin 7, and smoothly transmit force; it improves the smoothness and efficiency of transmission, reduces wear and noise, and optimizes the internal space layout, making the clutch structure more compact.

[0035] The handle wheel 6 has a rotating groove 62 at its center for the handle disc 5 to rotate. The handle disc 5 is installed in the rotating groove 62 at the center of the handle wheel 6 and can rotate relative to it. When the pin 7 is in the linkage position, the handle disc 5 and the handle wheel 6 are fixed by the rotating groove 62 and the pin 7, and rotate synchronously. The design of the rotating groove 62 reduces the space occupied between components, making the overall structure of the clutch more compact and easier to install in various locks, thus improving space utilization.

[0036] The handle dial 5 is equipped with a linkage block 52. The pressure block 83 is rotatably mounted on the linkage block 52 and located outside the housing 1. The pressure block 83 has a driving state to drive the handle dial 5 to rotate. When it is needed, the pressure block 83 is first lifted to release the pressure on the reset block 81. After the NFC component 3 senses it, the pressure block 83 is rotated to drive the handle dial 5.

[0037] Working process: When the automatic lock is powered off, the user lifts the pressure block 83. Under the action of the spring 82, the reset block 81 moves outward from the housing 1, which drives the torsion spring 71 to move, so that the torsion spring 71 abuts against the locking rod 72 and the top plate 73 respectively. Then, when the user brings the NFC device close to the lock, the NFC component 3 supplies power to the motor 2. The motor 2 drives the locking rod 72 to rotate, which in turn drives the torsion spring 71 to move. The torsion spring 71 uses its center on the reset block 81 as a fulcrum, so that its other end acts on the arc-shaped top plate 73, converting the rotational motion of the motor 2 into the vertical movement of the top plate 73. The top plate 73 pushes the pin 7 to slide upward, so that it simultaneously engages the pin hole 61 on the handle wheel 6 and the pin groove 51 on the handle disc 5, thereby connecting the handle disc 5 and the handle wheel. Wheels 6 are connected; since the handle wheel 6 is engaged with the square rod wheel 4 through its meshing part, the handle wheel 6 then drives the square rod wheel 4, which has a smaller diameter and is engaged with it, to rotate faster. At this time, turning the handle turntable 5 can drive the square rod wheel 4 to unlock; after unlocking, the pressure block 83 is put back, causing the reset block 81 to move inward, which can force the two ends of the torsion spring 71 to separate from the locking rod 72 and the top plate 73. The top plate 73 moves down, driving the pin 7 to exit the pin through hole 61 and the pin groove 51, thereby releasing the linkage under the action of the reset mechanism 8; in addition, when mechanical emergency unlocking is required, insert the key and turn the lock cylinder 9. The rotating inclined surface 92 at the top of the cylinder interacts with the mating inclined surface 93 at the bottom of the top plate 73, which can directly drive the top plate 73 and the pin 7 to move upward, which can also establish linkage to unlock.

Claims

1. A clutch for use in a fully automatic lock, characterized in that: The device includes a housing (1) and a motor (2), an NFC component (3), a square rod wheel (4), a handle turntable (5), a handle wheel (6), a pin (7), and a reset mechanism (8) disposed within the housing (1). The square rod wheel (4) and the handle wheel (6) mesh with each other, and the diameter of the square rod wheel (4) is smaller than the diameter of the handle wheel (6). The NFC component (3) is connected to the motor (2) and the NFC component (3) has a power supply state for supplying power to the motor (2). The motor (2) drives the pin (7) to move and forms a linkage between the handle turntable (5) and the handle wheel (6). The reset mechanism (8) drives the pin (7) to move in the opposite direction and releases the linkage between the handle turntable (5) and the handle wheel (6). The handle wheel (6) is provided with a pin through hole (61) for the pin rod (7) to slide, and the handle turntable (5) is provided with a pin groove (51) opposite to the pin through hole (61). The pin rod (7) has a linkage position that is simultaneously located in the pin through hole (61) and the pin groove (51) and forms a linkage between the handle turntable (5) and the square rod wheel (4). It also includes a torsion spring (71), a locking rod (72) and a top plate (73). The top plate (73) is located below the handle wheel (6) and abuts against the pin (7). The motor (2) drives the locking rod (72) to rotate. The torsion spring (71) has one end locked to the locking rod (72) and the other end located in the top plate (73) and forms the working state in which the motor (2) drives the pin (7) vertically. The reset mechanism (8) includes a reset block (81), a spring (82) and a pressure block (83). A connecting hole (11) is provided on the housing (1). The spring (82) is located inside the housing (1) and drives the reset block (81) to move along the connecting hole (11). The pressure block (83) is located outside the housing (1) and has a pressing state that presses the reset block (81) into the housing (1). The center of the torsion spring (71) is located on the reset block (81) and moves with the reset block (81). When the pressure block (83) is in the pressing state, the torsion spring (71) is separated from the locking rod (72) and the top plate (73). When the pressure block (83) is not in the pressing state, the torsion spring (71) abuts against the locking rod (72) and the top plate (73).

2. The clutch for use in a fully automatic lock according to claim 1, characterized in that: The bottom of the housing (1) is provided with a lock cylinder (9), the bottom of the lock cylinder (9) is provided with a key hole (91), the top of the lock cylinder (9) is provided with a rotating inclined surface (92), and the bottom of the top plate (73) is provided with a matching inclined surface (93) that is compatible with the rotating inclined surface (92).

3. A clutch for use in a fully automatic lock according to claim 1, characterized in that: The top plate (73) is arc-shaped and adapted to the shape of the handle wheel (6).

4. A clutch for use in a fully automatic lock according to claim 1, characterized in that: The handle wheel (6) is provided with a rotating groove (62) at the center for the handle turntable (5) to rotate.

5. A clutch for use in a fully automatic lock according to claim 1, characterized in that: The handle turntable (5) is provided with a linkage block (52), and the pressure block (83) is rotatably set on the linkage block (52) and located outside the housing (1). The pressure block (83) has a driving state to drive the handle turntable (5) to rotate.

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