A power switching device for a smart lock

Abstract

The utility model relates to intelligent lock technical field especially relates to a power switching device for intelligent lock. Including lock body, outdoor handle, password button, charging interface, fingerprint identification module, indoor handle, lock bolt and cam etc., the outdoor handle is rotatably connected to the lock body front side, the password button is installed on the lock body front side upper portion, the password button right side is equipped with the charging interface, the outdoor handle front side is equipped with the fingerprint identification module, the indoor handle is rotatably connected to the lock body rear side, the lock bolt is slidably connected to the lock body inner lower left side, the cam is rotatably connected to the lock body inside, and the cam side and lock bolt abut each other. The utility model discloses through setting up electromagnetic push rod drive driving gear no. 2 and switching between spacing tooth and external gear, realizes the power -on movable of outdoor handle, power -off locking, ensures that intelligent lock still has basic anti -theft function under the condition of no electricity, and prevents illegal opening risk.

Description

Technical Field

[0001] This utility model relates to the field of smart lock technology, and in particular to a power switching device for smart locks. Background Technology

[0002] With the popularization of smart homes, smart locks have been widely used in homes, offices and apartments. They enable convenient unlocking through fingerprint recognition, password input and other methods. In order to take into account both automated operation and user habits, smart locks usually have electric mode and manual mode, and can switch between the two through a power switching device. When the power supply is normal, the control system drives the clutch to unlock automatically. Users can also open it directly from inside the house with the handle to ensure basic access needs.

[0003] However, the power switching devices of existing smart locks are not reliable enough in emergency situations. Some products use electromagnetic clutch structures that rely on continuous power supply to maintain the on / off state. Once a power outage occurs or the battery is depleted, the clutch may be locked or misaligned, causing the transmission path to be blocked. Users cannot physically open the lock by turning the inner handle, which seriously threatens emergency escape safety. In addition, in some designs, the mechanical coupling between the motor rotor and the transmission mechanism is too tight. After the power is cut off, there is still a large magnetic resistance or mechanical resistance, making the inner handle difficult to operate or even stuck.

[0004] Therefore, it is necessary to design a power switching device for smart locks. Utility Model Content

[0005] In order to overcome the shortcomings of existing smart locks, such as unreliable power switching devices that may cause the inner handle to lock, this utility model provides a power switching device for smart locks.

[0006] A power switching device for a smart lock includes a lock body, an outdoor handle, a keypad, a charging port, a fingerprint recognition module, an indoor handle, a bolt, a cam, elastic elements, a lever, and a drive structure. The outdoor handle is rotatably connected to the front of the lock body. A keypad is installed on the upper part of the front of the lock body, and a charging port is located to the right of the keypad. A fingerprint recognition module is located on the front of the outdoor handle. The indoor handle is rotatably connected to the rear of the lock body. The bolt is slidably connected to the lower left part of the lock body. A cam is rotatably connected inside the lock body, with one side of the cam abutting against the bolt. Two elastic elements connect the bolt and the lock body. A lever is slidably connected to the rear of the lock body, located below the indoor handle and connected to the bolt. A drive structure is provided between the outdoor handle, the indoor handle, and the cam.

[0007] To further explain, the drive structure includes an internal gear, an external gear, a torsion spring, a first drive gear, an electromagnetic push rod, a second drive gear, and a limiting tooth. The front and rear sides of the cam shaft are respectively connected to the external gear and the internal gear, and a torsion spring connects the internal gear to the lock body. The first drive gear is fixedly connected to the inside of the indoor handle, and the first drive gear and the internal gear are always in a meshed state. An electromagnetic push rod is fixedly installed on the inside of the outdoor handle, and the second drive gear is connected to the telescopic end of the electromagnetic push rod. A limiting tooth is fixedly connected to the rear inside of the lock body. In the initial state when no power is applied, the electromagnetic push rod retracts, the second drive gear meshes with the limiting tooth, and the outdoor handle cannot be rotated. After power is applied, the electromagnetic push rod extends, the second drive gear disengages from the limiting tooth and meshes with the external gear, and the outdoor handle can be rotated.

[0008] To further explain, it also includes a keyhole, which is installed on the front side of the lock body and is connected to the cam shaft.

[0009] To further explain, it also includes a limit rod, which is fixed to one side inside the lock body and abuts against one side of the cam.

[0010] To further explain, it also includes a dust cover, which is rotated and connected to the front of the keyhole.

[0011] To further explain, the edges and contact surfaces of both the outdoor and indoor handles have been rounded.

[0012] The beneficial effects of this utility model are: 1. This utility model uses an electromagnetic push rod to drive the second active gear to switch between the limiting gear and the external gear, so as to realize that the outdoor handle is movable when powered on and locked when powered off, ensuring that the smart lock still has basic anti-theft functions when there is no power, and eliminating the risk of illegal opening.

[0013] 2. This utility model adopts a structural design in which the active gear and the internal gear always keep in mesh, so that the indoor handle and the cam form a permanent mechanical transmission chain. Regardless of whether the power supply is on or off, the user can directly turn the handle from inside to unlock, completely avoiding the safety hazard of the inner handle locking due to power failure. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the lock body, lever, and bolt components of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the indoor handle, internal gear, and limiting rod of this utility model.

[0017] Figure 4This is a schematic diagram of the planar structure of the cam, elastic element, and internal gear of this utility model.

[0018] Figure 5 This is a three-dimensional structural diagram of the components of this utility model, such as the torsion spring, the limiting tooth, and the keyhole.

[0019] Figure 6 This is a schematic diagram of the planar structure of the components of this utility model, including the first drive gear, the electromagnetic push rod, and the second drive gear.

[0020] The markings in the attached diagram are: 1. Lock body, 2. Outdoor handle, 3. Keypad, 4. Charging port, 5. Fingerprint recognition module, 6. Indoor handle, 7. Lock tongue, 8. Cam, 9. Elastic element, 10. Internal gear, 101. External gear, 11. Torsion spring, 12. Drive gear one, 13. Electromagnetic push rod, 14. Drive gear two, 15. Limiting tooth, 16. Keyhole, 17. Toggle block, 18. Limiting rod, 19. Dust cover. Detailed Implementation

[0021] Example: A power switching device for a smart lock, such as Figures 1-6 As shown, the lock includes a lock body 1, an outdoor handle 2, a keypad 3, a charging port 4, a fingerprint recognition module 5, an indoor handle 6, a bolt 7, a cam 8, an elastic element 9, a lever 17, and a drive structure. The outdoor handle 2 is rotatably connected to the front of the lock body 1. The keypad 3 is installed on the upper front of the lock body 1, and the charging port 4 is located to the right of the keypad 3. The fingerprint recognition module 5 is located on the front of the outdoor handle 2. The indoor handle 6 is rotatably connected to the rear of the lock body 1. The bolt 7 is slidably connected to the lower left side of the lock body 1. The cam 8 is rotatably connected inside the lock body 1. The cam 8 abuts against the latch 7 on one side. The latch 7 is connected to the lock body 1 by two elastic elements 9. The lock body 1 is slidably connected to the rear side of the lever 17. The lever 17 is located below the indoor handle 6 and is connected to the latch 7. This allows the user to manually unlock the lock in special circumstances, enhancing operational flexibility and emergency response capabilities. The outdoor handle 2 and the indoor handle 6 are equipped with a drive structure between them and the cam 8. The edges and contact surfaces of the outdoor handle 2 and the indoor handle 6 are rounded to improve grip comfort and prevent scratches.

[0022] like Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the drive structure includes an internal gear 10, an external gear 101, a torsion spring 11, a first drive gear 12, an electromagnetic push rod 13, a second drive gear 14, and a limiting tooth 15. The front and rear sides of the cam 8's rotating shaft are respectively connected to the external gear 101 and the internal gear 10, and the internal gear 10 is connected to the lock body 1 by a torsion spring 11. The inner side of the indoor handle 6 is fixedly connected to the first drive gear 12, and the first drive gear 12 and the internal gear 10 are always in a meshing state. The inner side of the outdoor handle 2 is fixedly installed with an electromagnetic push rod 13, and the second drive gear 14 is connected to the telescopic end of the electromagnetic push rod 13. The inner rear side of the lock body 1 is fixedly connected to the limiting tooth 15. In the initial state when no power is applied, the electromagnetic push rod 13 retracts, the second drive gear 14 meshes with the limiting tooth 15, and the outdoor handle 2 cannot rotate. After power is applied, the electromagnetic push rod 13 extends, the second drive gear 14 disengages from the limiting tooth 15 and meshes with the external gear 101, and the outdoor handle 2 can rotate.

[0023] like Figure 1 , Figure 5 and Figure 6 As shown, it also includes a keyhole 16. The keyhole 16 is installed on the front side of the lock body 1. The keyhole 16 is connected to the rotating shaft of the cam 8. It can be opened by mechanical key in case of electronic system failure, thereby improving reliability.

[0024] like Figure 3 and Figure 4 As shown, it also includes a limit rod 18. The limit rod 18 is fixedly connected to one side of the inside of the lock body 1. The limit rod 18 abuts against one side of the cam 8 to limit the rotation direction of the cam 8 and prevent it from rotating in the wrong direction, which would cause transmission failure.

[0025] like Figure 1 As shown, it also includes a dust cover 19, which is rotatably connected to the front of the keyhole 16 to prevent foreign objects from clogging the keyhole 16 and to improve the durability of the equipment.

[0026] In actual use, the operator first opens the door lock through the intelligent method. In the initial state, the device is not powered or is in standby mode. The electromagnetic push rod 13 is in the power-off retracted state. Its extension end drives the second drive gear 14 to move outward, so that the second drive gear 14 is engaged with the fixed limiting tooth 15 inside the lock body 1. Since the limiting tooth 15 is a fixed structure, it cannot rotate. Therefore, the second drive gear 14 is locked, which restricts the free rotation of the outdoor handle 2. At this time, even if external force is used to rotate the outdoor handle 2, it cannot transmit power, thus achieving safety protection.

[0027] When a user needs to unlock the door from the outside, they can register their fingerprint through the fingerprint recognition module 5 or enter the correct password on the password keypad 3. After successful verification, the control system supplies power to the electromagnetic push rod 13. The electromagnetic push rod 13 extends inward after being powered on, pushing the second drive gear 14 backward, disengaging it from the limiting tooth 15, and accurately engaging it with the external gear 101 on the cam 8's rotating shaft. At this time, the outdoor handle 2 and the external gear 101 form an effective transmission path. Then, the user rotates the outdoor handle 2, and the power is transmitted to the external gear 101 through the second drive gear 14, causing the cam 8 to rotate around its rotating shaft. Its edge pushes the latch 7, overcoming the elastic force of the elastic element 9, causing the latch 7 to retract into the lock body 1, disengage from the door frame lock hole, and unlock. After a period of time after unlocking, the electromagnetic push rod 13 will automatically de-energize, the second drive gear 14 will return to its original position, re-engage with the limiting tooth 15, and restore the anti-theft state.

[0028] Meanwhile, on the indoor side, regardless of whether the power is on, the user can physically unlock the door at any time using the indoor handle 6. The inner side of the indoor handle 6 is fixedly connected to the drive gear 12, which is always engaged with the inner gear 10 at the other end of the cam 8 shaft, forming a permanent mechanical linkage path. When the user turns the indoor handle 6, the power directly drives the inner gear 10 to rotate through the drive gear 12, which in turn drives the cam 8 to rotate and pushes the bolt 7 to retract to complete the unlocking. During the unlocking process, the torsion spring 11 is located between the inner gear 10 and the lock body 1 to provide the reset torque for the cam 8 shaft. When the handle is released, the torsion spring 11 releases its stored energy, causing the cam 8, handle and each gear to automatically return to their original positions. The bolt 7 pops out under the action of the elastic element 9, restoring the locked state.

[0029] When the user closes the door, the door frame will press the inclined surface of the latch 7, causing it to retract inward. Once the latch 7 crosses the edge of the door frame, the two elastic elements 9 release their stored energy, pushing the latch 7 to automatically pop out and lock into the door frame latch plate, thus achieving automatic locking. In case of emergency such as power failure or battery depletion, the electromagnetic push rod 13 will automatically return to the retracted state due to power failure, and the drive gear 14 will remain engaged with the limit gear 15. The outdoor handle 2 will be locked, but the mechanical transmission path of the indoor handle 6 will not be affected. The user can still turn the handle normally to unlock, ensuring emergency escape safety in case of fire, earthquake and other emergencies. In addition, the lock body 1 has a keyhole 16 on the front side, which is directly connected to the cam 8 shaft. It can be opened by mechanical key in case of electronic system failure. The power switching logic is clear, and the electric mode and manual mode do not interfere with each other, which not only meets the needs of intelligentization, but also ensures basic passage safety.

Claims

1. A power switching device for a smart lock, characterized in that: The lock includes a lock body (1), an outdoor handle (2), a keypad (3), a charging port (4), a fingerprint recognition module (5), an indoor handle (6), a bolt (7), a cam (8), an elastic element (9), a lever (17), and a drive structure. The outdoor handle (2) is rotatably connected to the front of the lock body (1). The keypad (3) is installed on the upper front of the lock body (1). The charging port (4) is located on the right side of the keypad (3). The fingerprint recognition module (5) is located on the front of the outdoor handle (2). The lock body (1) is rotatably connected to the rear of the lock body (1). The interior handle (6) and the lower left side of the lock body (1) are connected to the latch (7) in a sliding manner. The lock body (1) is connected to the cam (8) in a rotating manner. One side of the cam (8) abuts against the latch (7). There are two elastic elements (9) connecting the latch (7) and the lock body (1). The rear side of the lock body (1) is connected to the lever (17) in a sliding manner. The lever (17) is located below the interior handle (6) and is connected to the latch (7). The exterior handle (2) and the interior handle (6) are provided with a drive structure between the cam (8) and the cam (8).

2. The power switching device for a smart lock according to claim 1, characterized in that: The drive structure includes an internal gear (10), an external gear (101), a torsion spring (11), a first drive gear (12), an electromagnetic push rod (13), a second drive gear (14), and a limiting tooth (15). The front and rear sides of the cam (8) shaft are respectively connected to the external gear (101) and the internal gear (10), and the internal gear (10) is connected to the lock body (1) by a torsion spring (11). The inner side of the indoor handle (6) is fixedly connected to the first drive gear (12), and the first drive gear (12) and the internal gear (10) are always in mesh. An electromagnetic push rod (13) is fixedly installed on the inside of the handle (2). The extension end of the electromagnetic push rod (13) is connected to the second drive gear (14). The rear side of the lock body (1) is fixedly connected to the limit tooth (15). In the initial state when no power is applied, the electromagnetic push rod (13) retracts, the second drive gear (14) meshes with the limit tooth (15), and the outdoor handle (2) cannot rotate. After power is applied, the electromagnetic push rod (13) extends, the second drive gear (14) disengages from the limit tooth (15) and meshes with the external gear (101), and the outdoor handle (2) can rotate.

3. The power switching device for a smart lock according to claim 2, characterized in that: It also includes a keyhole (16), the keyhole (16) is installed on the front side of the lock body (1), and the keyhole (16) is connected to the cam (8) shaft.

4. The power switching device for a smart lock according to claim 3, characterized in that: It also includes a limit rod (18), which is fixed to one side of the lock body (1), and the limit rod (18) abuts against one side of the cam (8).

5. The power switching device for a smart lock according to claim 4, characterized in that: It also includes a dust cover (19), and the dust cover (19) is rotated on the front side of the keyhole (16).

6. The power switching device for a smart lock according to claim 5, characterized in that: The edges and contact surfaces of both the outdoor handle (2) and the indoor handle (6) are rounded.

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