Hanging type intelligent lock free of battery replacement

Abstract

The utility model relates to a battery-replacement-free hanging type intelligent lock which comprises a shell, one end of the shell is open, the interior of the shell is hollow to form a containing space, and a U-shaped lock hook is inserted into the shell from the end away from the open end; the inner main body is clamped in the accommodating space, and a groove for mounting the transmission mechanism is formed in the inner main body; the maximum stroke position of the output end of the transmission mechanism is connected with the locking position of the U-shaped lock hook in a clamped mode. The main control board is fixed in the inner main body, is far away from the transmission mechanism side and is connected with the battery; a detection switch is arranged at the locking position, opposite to the U-shaped lock hook, of the main control board. The magnetic suction interface assembly is positioned at the rear part of the inner main body and is connected with the main control board; the bottom shell cover blocks the opening of the outer shell, and an interface is reserved in the bottom shell cover. And the U-shaped lock hook presses down the detection switch to wake up the lockset, so that the lockset can reach a longer service cycle. And the bottom of the lock is provided with a concave magnetic suction interface, so that the lock can be connected with external equipment, power supply and communication of the main control board are realized, and the problems of short battery life and high cost of the lock are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of security intelligent locks, and more specifically to a hanging intelligent lock that does not require battery replacement and is suitable for scenes such as power distribution meter boxes and electric energy meter boxes. Background Art

[0002] With the rapid development of electronic technology, many electronic padlocks have emerged in the existing technology, such as electronic padlocks that can be opened through RFID, Bluetooth, etc. The above unlocking methods can improve the security of traditional mechanical locks and easily realize the function of automatic unlocking recording. However, the above electronic padlocks have the following shortcomings: electronic padlocks are generally battery-powered and are in a communication waiting state for a long time, which consumes a lot of power. Due to the size limitation of the padlock, the battery capacity is generally small. Locks with replaceable batteries need to be frequently replaced due to the consumption of the battery power, which greatly increases the operation and maintenance costs. In some scenarios, a working cycle of less than 3 years means unacceptable operation and maintenance costs. Locks that cannot replace batteries have a short battery life because they need to remain in a communication waiting state. The cost of changing locks and the operation and maintenance costs are both high, which greatly limits the application scenarios of the locks.

[0003] Therefore, how to provide a battery-free hanging smart lock is a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] Therefore, the purpose of the present invention is to provide a hanging smart lock that does not require battery replacement, so as to solve the problems of short battery life and high cost of lock batteries.

[0005] The utility model provides a battery-free hanging smart lock, comprising: a housing, one end of which is open and the interior of which is hollow to form a receiving space, and a U-shaped lock hook is inserted from the end away from the open end;

[0006] An inner body, the inner body being engaged in the accommodating space and having a groove therein for mounting a transmission mechanism; the output end of the transmission mechanism being engaged with the locking position of the U-shaped lock hook at the maximum stroke;

[0007] A main control board, fixed in the inner body and away from the transmission mechanism, connected to a battery; a detection switch is provided on the main control board at a locking position relative to the U-shaped lock hook;

[0008] It also includes a magnetic interface component, which is located at the rear of the inner body and connected to the main control board;

[0009] The bottom shell cover blocks the opening of the outer shell and leaves an interface.

[0010] Furthermore, the magnetic interface assembly includes:

[0011] A magnetic interface bracket, wherein the middle portion of the magnetic interface bracket has a concave magnetic guide hole, the end of the inner body away from the U-shaped lock hook is provided with a first clamping portion, and the magnetic interface bracket has a second clamping portion that cooperates with the first clamping portion;

[0012] A strong annular magnet installed in the concave magnetic guide hole;

[0013] A magnetic interface board, one side of which is connected to the main control board via a cable, and the other side of which has a magnetic interface column supporting the annular strong magnet, wherein the magnetic interface column corresponds to the interface position of the bottom shell cover.

[0014] Furthermore, the magnetic interface column has a magnetic communication interface, including four ring terminals, two power terminals and two signal terminals.

[0015] Furthermore, the main control board has a Bluetooth module.

[0016] Furthermore, the transmission mechanism includes:

[0017] A gear box is installed in the groove of the inner body, wherein a gear is provided therein and a guide rail groove is provided near the position of the gear;

[0018] a motor, wherein the output end of the motor extends into the gear box and is dynamically connected to the gear, and the motor is electrically connected to the main control board;

[0019] The rack is meshed with the gear for transmission, and the rack moves in the guide rail groove and is disengaged from or abuts against the buckle position of the U-shaped lock hook.

[0020] Furthermore, the locking section of the U-shaped lock hook is provided with a connecting column, a protrusion, a locking groove and an inner bayonet in sequence from the end to the front;

[0021] The inner body is provided with an insertion channel toward the locking section of the U-shaped lock hook, the distal end of the insertion channel is blocked, a spring is installed therein, the spring is sleeved on the connecting column, when the locking section of the U-shaped lock hook is in the locked position, a steel ball is abutted under the protrusion, and the steel ball contacts the detection switch; a pin hole is provided on the inner body perpendicular to the insertion channel, and the pin hole is communicated with the insertion channel, a limiting pin of the U-shaped lock hook is installed in the pin hole, and a spring piece is inserted into the spring piece slot corresponding to the top of the limiting pin, the spring piece presses the limiting pin, and the limiting pin of the U-shaped lock hook abuts or disengages from the locking groove;

[0022] The end portion of the rack is disengaged from or abuts against the inner bayonet.

[0023] Furthermore, the main control board includes a main control MCU, and a motor drive circuit, a magnetic communication interface circuit, a Bluetooth circuit, a lock hook detection switch, a rack unlocking position switch, a rack locking position switch and a power supply circuit electrically connected to the main control MCU.

[0024] It can be seen from the above technical solution that compared with the prior art, the present invention has the following beneficial effects:

[0025] This new U-shaped lock hook features a detection switch that activates the lock when the lock beam is depressed, extending the lock's lifespan. A concave magnetic interface is designed on the bottom of the lock for connection to external devices, providing power and communication to the main control board, addressing the issues of short battery life and high cost.

[0026] There is a strong magnetic structure inside the shell to tightly attract the magnetic communication lines of external devices, which is firm, reliable, waterproof and dustproof.

[0027] The utility model is mainly applicable to the case where the battery is out of power and can solve the problem of opening and closing the lock in an emergency, thereby expanding the use range of the padlock. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 An exploded diagram of a battery-free hanging smart lock provided by the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of a battery-free hanging smart lock provided by the present invention (the housing is not shown);

[0031] Figure 3 The figure shows a rear view of a battery-free hanging smart lock provided by the present invention (the housing is not shown);

[0032] Figure 4 The schematic diagram of the structure of the magnetic interface bracket is shown;

[0033] Figure 5 The schematic diagram of the structure of the U-shaped lock hook is shown;

[0034] Figure 6 The schematic diagram of the structure of the inner body is shown (the dotted line part represents the internal structure of the inner body);

[0035] Figure 7It shows the structure diagram of the main control board. DETAILED DESCRIPTION

[0036] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] Because electronic padlocks are typically battery-powered and remain in a communication standby state for extended periods, they consume significant power. Due to the padlock's size, the battery capacity is typically small. For locks with replaceable batteries, frequent battery replacements are necessary due to power consumption, significantly increasing operational costs. For locks with non-replaceable batteries, the need to remain in a communication standby state results in shorter battery life, resulting in higher replacement and maintenance costs, significantly limiting their applicability.

[0038] In view of this, the present invention provides a battery-free hanging smart lock. Figure 1-6 , comprising: a shell 2, wherein one end of the shell 2 is open and the interior is hollow to form a receiving space, and a U-shaped lock hook 1 is inserted from the end away from the open end;

[0039] The inner body 6 is engaged with the accommodating space and has a groove for installing a transmission mechanism therein; the output end of the transmission mechanism is engaged with the locking position of the U-shaped lock hook 1 at the maximum stroke;

[0040] A main control board 8 is fixed in the inner body 6 and away from the transmission mechanism. The main control board 8 is connected to the battery 14. A detection switch 81 is provided on the main control board 8 relative to the locked position of the U-shaped lock hook 1.

[0041] It also includes a magnetic interface component, which is located at the rear of the inner body 6 and connected to the main control board 8;

[0042] The bottom shell cover 11 blocks the opening of the outer shell 2 and leaves an interface.

[0043] In the above embodiment, the U-shaped lock hook presses down the detection switch, so that the lock is awakened by pressing the lock beam. Before waking up, the lock is in a dormant state, so that the lock can achieve a longer service life. An inner concave magnetic interface is designed at the bottom of the lock, which can be connected to an external device to realize power supply and communication of the main control board, solving the problems of short battery life and high cost of the lock. There is a strong magnetic structure inside the shell that is tightly fixed and firmly connected to the power supply end of the external device. The utility model is mainly suitable for emergency solutions to switch the lock when the battery is dead, thereby expanding the scope of use of the padlock.

[0044] In a specific embodiment of the present invention, the length*width*height of the lock can be 40*22*50 mm.

[0045] In an embodiment of the present invention, the magnetic interface assembly includes:

[0046] The magnetic interface bracket 12 has a concave magnetic guide hole 121 in the middle portion of the magnetic interface bracket 12. The end of the inner body 6 away from the U-shaped lock hook 1 is provided with a first clamping portion, and the magnetic interface bracket 12 has a second clamping portion that cooperates with the first clamping portion; wherein the first clamping portion can be a clamping slot structure, and the second clamping portion can be a clamping block structure;

[0047] A strong annular magnet 10 is installed in the concave magnetic guide hole 121;

[0048] The magnetic interface board 9 has one side connected to the main control board 8 via a flat cable 13, and the other side has a magnetic interface column 91 supporting the annular strong magnet 10, and the magnetic interface column 91 corresponds to the interface position of the bottom shell cover 11.

[0049] In a specific embodiment of the present invention, the magnetic interface column 91 has a magnetic communication interface, including four ring terminals, two power terminals and two signal terminals.

[0050] Optionally, the main control board 8 has a Bluetooth module or a magnetic communication module.

[0051] In the present invention, the transmission mechanism includes:

[0052] The gear box 15 is installed in the groove of the inner body 6, and has a gear therein and a guide groove near the gear;

[0053] A motor 16, wherein the output end of the motor 16 extends into the gear box 15 and is dynamically connected to the gear, and the motor 16 is electrically connected to the main control board 8;

[0054] The rack 17 is meshed with the gear for transmission, and the rack 17 moves in the guide rail groove and disengages from or abuts against the buckle position of the U-shaped lock hook 1.

[0055] In the above embodiments, the locking section of the U-shaped lock hook 1 is provided with a connecting column 101, a protrusion 102, a locking groove 103 and an inner bayonet 104 in sequence from the end to the front; the inner body 6 is provided with an insertion channel 601 toward the locking section of the U-shaped lock hook 1, the distal end of the insertion channel 601 is blocked, and a spring 5 is installed therein, the spring 5 is sleeved on the connecting column 101, and when the locking section of the U-shaped lock hook 1 is in the locked position, the protrusion 102 is abutted against a steel ball 7 below, and the steel ball 7 is in contact with the detection switch 81; a pin hole 602 is provided on the inner body 6 perpendicular to the insertion channel 601, and the pin hole 602 is communicated with the insertion channel 601, a limit pin 4 of a U-shaped lock hook is installed in the pin hole 602, and a spring piece 3 is inserted into the spring piece slot corresponding to the top of the limit pin 4, the spring piece 3 presses the limit pin 4, and the limit pin 4 of the U-shaped lock hook abuts or disengages from the locking groove 103; the end of the rack 17 disengages or abuts from the inner bayonet 104.

[0056] The utility model provides a new type of hanging smart lock that does not require battery replacement. After pressing the lock hook to activate the lock, the unlocking and closing operations can be controlled by Bluetooth communication through the mobile phone, and the unlocking operation can be uploaded to the lock management platform as an unlocking record through the mobile phone. During normal standby operation, the internal circuit is in a deep sleep state, which makes the lock power consumption extremely low, ensuring that the lock can be used for an extremely long time. To wake up the lock, the lock hook presses the detection switch to connect the mobile phone Bluetooth to unlock the lock; the bottom of the lock is designed with a recessed magnetic emergency power communication interface for emergency unlocking and closing when the battery is low.

[0057] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0058] When installing this utility model:

[0059] ① First, install the motor 16 and rack 17 into the gearbox 15 and snap them into the corresponding grooves on the front of the main body 6. Lead the power signal line of the motor 16 out and weld it to the corresponding position on the main control board 8. When the motor rotates, it drives the gear to rotate forward and reverse, and the gear and rack are meshed. Under the action of the forward and reverse rotation of the gear, the rack moves back and forth, clamping and releasing the lock hook.

[0060] ② Then put the steel ball 7 into the guide groove on the back of the inner body 6, and use screws to lock the main control board 8 into the corresponding position on the back of the inner main board 6, so that the detection switch on the main control board just contacts the steel ball 7. When the lock hook 1 is pressed to the bottom, the protrusion of the lock hook will squeeze the steel ball 7 and at the same time press the detection switch on the main control board to trigger the connection command. The motor will rotate and drive the rack 17 to extend and engage the inner latch of the lock hook, which is the locked state. When the motor receives the unlock command, it drives the rack to retract and separate from the inner latch of the lock hook, and the lock hook pops out, which is the unlocked state.

[0061] ③ Insert the battery 14 into the corresponding battery slot on the back of the inner body 6, and at the same time, lead out the positive and negative leads of the power supply and weld them to the corresponding positive and negative positions of the main control board 8. The battery provides power to the entire machine.

[0062] ④ Connect the magnetic interface board 9 to the main control board 8 with the flat cable 13. Plug the cable into the main control board socket securely. If the internal power supply fails and the lock cannot be opened, use an external power supply using a universal magnetic connector connected to the magnetic interface board 9 to power the lock.

[0063] ⑤ Place the strong annular magnet 10 into the corresponding recessed magnetic guide hole in the magnetic interface bracket 12. Insert the magnetic interface plate 9 through the strong annular magnet 10 and fit it onto the magnetic interface bracket. Align the magnetic interface bracket 12 with the lower portion of the inner body 6 and snap together to form a complete unit. The strong annular magnet, magnetic interface plate, and magnetic interface bracket fit together, allowing them to connect to an external connector through magnetic force and structural coordination, providing power and communication to the entire lock. The magnetic interface is recessed and concealed.

[0064] ⑥ Install spring 5 into the insertion channel on the left side of the inner body 6. Simultaneously, insert the locking hook's stop pin 4 into the corresponding stop pin hole in the inner body, and insert the spring clip 3 into the corresponding spring clip slot on top of the stop pin. The spring's function is to eject the locking hook; the stop pin is used to lock the locking hook in place. When the locking hook is ejected a certain distance, it will be locked by the stop pin, preventing it from separating from the inner body. The spring clip's function is to press the stop pin.

[0065] ⑦ Next, align the inner body with the inner housing of the outer shell 2 and insert it to the bottom. Simultaneously, align the raised end of the hook 1 with the outer shell 2 and insert it into the inner body's insertion channel until the hook protrudes past the stop pin and clicks. The connecting post at the base of the hook will engage the spring, creating pressure. The stop pin acts as a guide when the hook is installed, and acts as a limit lock when the hook is released, preventing it from completely separating from the inner body.

[0066] ⑧Finally, close the bottom shell cover 11. The bottom shell cover is tightly fitted with the outer shell 2, and the inner surface of the bottom shell cover is pressed against the lower surface of the magnetic interface bracket 12.

[0067] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0068] Unlocking process

[0069] The battery 14 provides power, and the standby working lock is in a dormant state. When the lock hook 1 is pressed, the detection switch on the main control board 8 is triggered, and the lock is activated to enter a normal working state. When the main control board 8 receives the unlocking command, the drive motor 16 rotates, and the rack 17 is pulled along the guide groove to slide toward the inside of the gear box through the gear. When the sliding triggers the position switch, the gear box motor 16 stops rotating, and the rack 17 disengages from the inner snap-in of the lock hook 1. Under the action of the elastic force of the spring 5, the lock hook 1 is pushed to the snap-in position of the lock hook limit pin 4. At this time, the lock hole of the shell 2 is separated from the card point at the other end of the lock hook 1 to realize the unlocking operation.

[0070] Locking process

[0071] When the lock hook 1 is pressed, the lock hook 1 detection switch on the main control board 8 is triggered, thereby activating the lock to enter normal working state and driving the motor 16 to rotate, pushing the rack 17 to slide to the outside of the gear box through the connected gear. When the sliding triggers the position switch, the gear box motor 16 stops rotating, and the rack 17 is stuck in the inner bayonet of the lock hook 1 to realize the locking operation.

[0072] Unlocking process when battery is low

[0073] When the battery 14 is underpowered, the main control board 8 and the motor 16 cannot work properly. At this time, you can use the magnetic communication line plug to insert it into the interface of the outer shell cover 11. The magnetic force generated by the annular strong magnet 10 makes the magnetic communication line plug tightly attached to the magnetic interface bracket 12 and connected to the magnetic interface board 9. The power supply and signal are connected to the main control board 8 through the cable 13. The external device supplies power to the lock through the magnetic communication line and sends an unlocking command to the lock. When the main control board 8 receives the unlocking command, it drives the gearbox motor 16 to rotate, and pulls the rack 17 to slide inside the gearbox through the connected gear. When the sliding triggers the position switch, the motor 16 stops rotating, and the rack 17 disengages from the inner snap-in of the lock hook 1. Under the action of the spring 5, the lock hook 1 is pushed to the snap-in position of the lock hook limit pin 4. At this time, the lock hole of the outer shell 2 is separated from the card point at the other end of the lock hook 1 to realize the unlocking operation.

[0074] Battery low power lockout process

[0075] When the battery 14 is low on power, the main control board 8 and motor 16 cannot function properly. At this point, a magnetic communication line plug can be inserted into the interface of the outer cover 11. The magnetic force generated by the strong annular magnet 10 causes the magnetic communication line plug to be tightly attached to the magnetic interface bracket 12, connecting it to the magnetic interface board 9. The power and signal are then connected to the main control board 8 via the flat cable 13. When the external device power is supplied to the main board via the magnetic communication line, the lock enters the working state, and the locking operation can be performed according to the normal locking process.

[0076] The main control board of this utility model includes the main control MCU, motor drive circuit, magnetic communication interface circuit, Bluetooth circuit, lock hook detection switch, rack unlocking position switch, rack locking position switch and power supply circuit. The main control board is responsible for lock power consumption management, communication processing and opening and closing the lock. Figure 7 .

[0077] This utility model causes the lock to enter a normal working state from a deep sleep state by pressing the lock hook, and then can communicate normally with external devices through Bluetooth or through a magnetic communication line to realize the lock opening and closing operation, which greatly reduces the power consumption of the smart lock and allows the smart lock to work longer before the battery is exhausted, thereby achieving the same life of the lock and the battery. When the smart lock is low on power, an external magnetic communication line can be used to open and close the lock, avoiding violent unlocking when the battery is low on power. This utility model solves the problem of electronic padlocks that cause the battery power to deplete too quickly due to the need for standby communication, and avoids violent unlocking due to low battery.

[0078] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0079] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery-free hanging smart lock, comprising: A housing (2), wherein one end of the housing (2) is open and the interior is hollow to form a receiving space, and the U-shaped lock hook (1) is inserted from the end away from the open end; An inner body (6), the inner body (6) is engaged in the accommodating space and has a groove for installing a transmission mechanism therein; the output end of the transmission mechanism is engaged with the locking position of the U-shaped lock hook (1) at the maximum stroke; A main control board (8), the main control board (8) is fixed in the inner body (6) and away from the transmission mechanism side, the main control board (8) is connected to the battery (14); the main control board (8) is provided with a detection switch (81) relative to the locking position of the U-shaped lock hook (1); characterized in that, It also includes a magnetic interface component, which is located at the rear of the inner body (6) and is connected to the main control board (8); The bottom shell cover (11) blocks the opening of the outer shell (2) and leaves an interface.

2. The battery-free hanging smart lock according to claim 1, characterized in that: The magnetic interface assembly includes: A magnetic interface bracket (12), wherein the middle portion of the magnetic interface bracket (12) has an inwardly concave magnetic guide hole (121), an end of the inner body (6) away from the U-shaped lock hook (1) is provided with a first clamping portion, and the magnetic interface bracket (12) has a second clamping portion that cooperates with the first clamping portion; An annular strong magnet (10), the annular strong magnet (10) is installed in the concave magnetic attraction guide hole (121); A magnetic interface board (9), one side of which is connected to the main control board (8) via a cable (13), and the other side of which has a magnetic interface column (91) supporting the annular strong magnet (10), wherein the magnetic interface column (91) corresponds to the interface position of the bottom shell cover (11).

3. The battery-free hanging smart lock according to claim 2, characterized in that: The magnetic interface column (91) is provided with a magnetic communication interface, comprising four ring terminals, two power terminals and two signal terminals.

4. The battery-free hanging smart lock according to claim 1, characterized in that: The main control board (8) is provided with a Bluetooth module.

5. The battery-free hanging smart lock according to claim 1, characterized in that: The transmission mechanism comprises: A gear box (15), the gear box (15) is installed in the groove of the inner body (6), a gear is provided therein, and a guide rail groove is provided near the position of the gear; A motor (16), wherein the output end of the motor (16) extends into the gear box (15) and is dynamically connected to the gear, and the motor (16) is electrically connected to the main control board (8); A rack (17) is meshed with the gear for transmission, and the rack (17) moves in the guide rail groove and is disengaged from or abuts against the buckle position of the U-shaped lock hook (1).

6. The battery-free hanging smart lock according to claim 5, characterized in that: The locking section of the U-shaped lock hook (1) is provided with a connecting column (101), a protrusion (102), a locking groove (103) and an inner bayonet (104) in sequence from the end to the front; The inner body (6) is provided with an insertion channel (601) toward the locking section of the U-shaped lock hook (1), the distal end of the insertion channel (601) is blocked, and a spring (5) is installed therein, the spring (5) is sleeved on the connecting column (101), and when the locking section of the U-shaped lock hook (1) is in the locked position, a steel ball (7) is abutted below the protrusion (102), and the steel ball (7) is in contact with the detection switch (81); the inner body (6) A pin hole (602) is provided vertically on the insertion channel (601), and the pin hole (602) is communicated with the insertion channel (601), a limiting pin (4) of a U-shaped lock hook is installed in the pin hole (602), and a spring piece (3) is inserted into the spring piece slot corresponding to the top of the limiting pin (4), the spring piece (3) presses the limiting pin (4), and the limiting pin (4) of the U-shaped lock hook abuts or disengages from the locking groove (103); The end of the rack (17) is disengaged from or abuts against the inner bayonet (104).

7. The battery-free hanging smart lock according to claim 1, characterized in that: The main control board (8) includes a main control MCU, and a motor drive circuit, a magnetic communication interface circuit, a Bluetooth circuit, a lock hook detection switch, a rack unlocking position switch, a rack locking position switch and a power supply circuit electrically connected to the main control MCU.

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