A NB-IOT smart padlock

Abstract

The present invention discloses an NB‑IOT smart padlock, wherein one side of the top of the lock shell is provided with a locking hole, and the other side of the top of the lock shell is provided with an extending step; the lower lock body is fixed at the bottom opening of the lock shell, a closed cavity is formed between the lower lock body and the lock shell, the upper lock body is arranged in the closed cavity, the upper lock body is provided with a lock hook mounting hole, the long arm end of the lock hook is inserted into the lock hook mounting hole, and the short arm end of the lock hook is inserted into the locking hole; the rainproof cap is fixedly sleeved on the long arm end, the rainproof cap is sleeved on the extending step, a limiting ring groove is provided on the long arm end, a set screw passes through the side wall of the extending step and is located in the limiting ring groove, the limiting steel ball is fixedly arranged in the upper lock body, a first sliding groove is provided on the side wall of the long arm end, and a rotating ring groove is provided on the end end of the first sliding groove; a second sliding groove is provided at a position 180° relative to the first sliding groove, and the second sliding groove passes through to the bottom of the long arm end, so that the padlock is convenient for replacing the lock hook.

Description

Technical Field

[0001] The present invention relates to a smart padlock, and in particular to an NB-IOT smart padlock. Background Art

[0002] Padlocks often fail to lock properly due to improperly sized keyholes. In these cases, padlocks with different hook sizes are typically replaced to accommodate the keyholes of different locking devices. Consequently, padlocks of various sizes are required. There are also cases where the hook needs to be replaced due to, for example, hook damage. Conventional padlocks do not allow for easy replacement of the hook. To replace the hook, the internal structure of the padlock must be disassembled and the internal parts adjusted using specialized tools. This entire process requires a professional locksmith, making it inconvenient and uneconomical for the user. Therefore, improvements to existing padlocks are necessary. Summary of the Invention

[0003] The object of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an NB-IOT smart padlock, which is convenient for replacing the lock hook.

[0004] To achieve the above-mentioned purpose, the NB-IOT smart padlock of the present invention includes a lock shell, a lower lock body, an upper lock body, a lock hook, a rainproof cap, a set screw and a limit steel ball;

[0005] A locking hole is provided on one side of the top of the lock shell, and a protruding step is provided on the other side of the top of the lock shell; the lower lock body is fixed to the bottom opening of the lock shell, and a closed cavity is formed between the lower lock body and the lock shell. The upper lock body is arranged in the closed cavity, and the upper lock body is provided with a lock hook mounting hole, the long arm end of the lock hook is inserted into the lock hook mounting hole, and the short arm end of the lock hook is inserted into the locking hole;

[0006] The rain cap is fixedly sleeved on the long arm end, and the rain cap is sleeved on the extended step. A limiting ring groove is provided on the long arm end, and the set screw passes through the side wall of the extended step and is in the limiting ring groove. The limiting steel ball is fixedly arranged in the upper lock body. A first sliding groove is provided on the side wall of the long arm end, and a rotating ring groove is provided on the end of the first sliding groove; a second sliding groove is provided at a position 180° relative to the first sliding groove, and the second sliding groove extends to the bottom of the long arm end.

[0007] A threaded hole is provided on the top of the lower lock body; a through hole is provided on the top of the lock shell, and an anti-disassembly screw passes through the through hole and is inserted into the threaded hole.

[0008] It also includes a lock hook spring; the lock hook spring is arranged at the bottom of the lock hook installation hole, and the lock hook spring is in contact with the long arm end and the bottom of the lock hook installation hole.

[0009] Also included is a locking assembly, which includes a locking rotary block, a plurality of locking steel balls, and a driving assembly for driving the locking rotary block;

[0010] Each locking steel ball is arranged in the through hole on the upper lock body in sequence, and a locking groove is opened on the end of the long arm. The locking steel ball is opposite to the locking groove. When the locking steel ball is partially stuck in the locking groove, the lock hook is in the locking position; when all the locking steel balls are out of the locking groove, the lock hook is in the unlocking position.

[0011] The driving assembly includes a mounting block, a motor, a transfer shaft, a driving shaft, a torsion spring and a rotating shaft;

[0012] The mounting block is fixedly installed in the lower lock body, the mounting block is a hollow structure, and the motor is arranged in the mounting block; the adapter shaft is connected to the output shaft of the motor, the adapter shaft has a limit groove, and a limit column is provided on the inner wall of the mounting block, and the limit column is inserted into the limit groove;

[0013] The torsion spring is sleeved on the adapter shaft, wherein one end of the torsion spring is connected to the adapter shaft, and the other end of the torsion spring is connected to the drive shaft;

[0014] The lower end of the rotating shaft is connected to the top of the driving shaft; the rotating shaft is provided with an eccentrically distributed driving boss, which extends out of the rotating shaft and is inserted into the driving groove.

[0015] The drive shaft and the adapter shaft are coaxially arranged, and the drive shaft is located above the adapter shaft;

[0016] The circuit assembly includes a mounting housing, a magnet, a Hall element, an electronic circuit, and a battery for providing electrical energy;

[0017] The mounting shell is fixed to the bottom of the lock shell, and a mounting cavity is formed between the mounting shell and the lock shell;

[0018] The magnetic steel is arranged at the bottom of the long arm end, the electronic circuit is arranged in the installation cavity, the electronic circuit is connected to the Hall element, and the electronic circuit is connected to the control end of the motor.

[0019] The electronic circuit has a built-in NB-IOT communication module.

[0020] The present invention has the following beneficial effects:

[0021] During the specific operation of the NB-IOT smart padlock described in the present invention, when the lock hook needs to be replaced, the lock hook is first placed in the unlocked position and the lock hook is rotated 180°. At this time, the lock hook is in the replacement position, and the rain cap moves upward along with the lock hook. The set screw is exposed outside the rain cap. After the operator removes the set screw with a tool, the lock hook can continue to move upward because the set screw is no longer limited in the limiting ring groove. Moreover, since the second sliding groove is a through groove structure, the limiting steel ball can move along the second sliding groove to the bottom until it falls out of the second sliding groove. At this time, the lock hook is completely out of the upper lock body. The operator replaces the lock hook and then re-installs the new lock hook into the upper lock body to realize the replacement of the lock hook. The operation is relatively simple and convenient.

[0022] Furthermore, the present invention adopts a flexible drive of a torsion spring. Through the energy storage of the torsion spring, the locking assembly can be indirectly driven to move, thereby preventing unlocking failure when an external force prevents the lock hook from moving. When the external force is removed, the unlocking can be completed by the energy storage drive of the torsion spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 An exploded view of the present invention;

[0024] Figure 2 It is a cross-sectional view of the structure of the present invention when it is in a locked state;

[0025] Figure 3 It is a three-dimensional schematic diagram of part of the structure of the present invention when it is in a locked state;

[0026] Figure 4 It is a cross-sectional view of the structure of the present invention when it is in an unlocked state;

[0027] Figure 5 It is a three-dimensional schematic diagram of a part of the structure of the present invention when it is in an unlocked state;

[0028] Figure 6 It is a structural cross-sectional view of the present invention when it is in a replacement state;

[0029] Figure 7 It is a partial structural perspective diagram of the present invention when it is in a replacement state.

[0030] Among them, 110 is the lock shell, 111 is the locking hole, 112 is the extending step, 120 is the lower lock body, 121 is the threaded hole, 130 is the upper lock body, 131 is the lock hook mounting hole, 140 is the lock hook, 141 is the long arm end, 1411 is the limiting ring groove, 1412 is the first sliding groove, 1413 is the rotating ring groove, 1414 is the second sliding groove, 1415 is the locking groove, 142 is the short arm end, 150 is the lock hook spring, 160 is the rain cap, 170 is the set screw, 180 is the limiting Steel ball, 190 is a magnet, 200 is a Hall element, 210 is a locking assembly, 211 is a locking steel ball, 212 is a locking rotating block, 2121 is an unlocking slot, 2122 is a driving slot, 220 is a driving assembly, 221 is a mounting block, 222 is a motor, 223 is a connecting shaft, 224 is a driving shaft, 225 is a torsion spring, 226 is a rotating shaft, 2261 is a driving boss, 227 is a cover plate, 230 is a circuit assembly, 231 is a mounting shell, 232 is an electronic circuit, and 233 is a battery. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0032] The accompanying drawings illustrate schematic diagrams of the structures of the disclosed embodiments of the present invention. These figures are not drawn to scale; for the purpose of clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0033] refer to Figures 1 to 7 The NB-IOT smart padlock of the present invention includes a lock housing 110, a lower lock body 120, an upper lock body 130, a lock hook 140, a lock hook spring 150, a rainproof cap 160, a set screw 170, a limit steel ball 180, a magnet 190, a Hall element 200, a locking assembly 210, a drive assembly 220, and a circuit assembly 230:

[0034] A locking hole 111 is provided on one side of the top of the lock housing 110 , and a protruding step 112 is provided on the other side of the top of the lock housing 110 .

[0035] The lower lock body 120 is fixed to the bottom opening of the lock shell 110, wherein a closed cavity is formed between the lower lock body 120 and the lock shell 110; a threaded hole 121 is provided at the top of the lower lock body 120; a through hole is provided at the top of the lock shell 110, and an anti-disassembly screw passes through the through hole and is inserted into the threaded hole 121 to connect the lower lock body 120 to the lock shell 110.

[0036] The upper lock body 130 is disposed in the closed cavity, wherein the upper lock body 130 is fixed in the lock housing 110 by screws, and the upper lock body 130 is provided with a lock hook mounting hole 131 .

[0037] The long arm end 141 of the lock hook 140 is inserted into the lock hook mounting hole 131, and the short arm end 142 of the lock hook 140 is inserted into the locking hole 111; the lock hook 140 has a locked position, an unlocked position and a replacement position. When the lock hook 140 is in the locked position, the short arm end 142 is in the locking hole 111; when the lock hook 140 is in the unlocked position, the short arm end 142 is disengaged from the locking hole 111 and can rotate; when the lock hook 140 is in the replacement position, the lock hook 140 rotates 180°, and the long arm end 141 can be disengaged from the lock hook mounting hole 131.

[0038] The lock hook spring 150 is disposed at the bottom of the lock hook mounting hole 131 , and the lock hook spring 150 contacts the long arm end 141 and the bottom of the lock hook mounting hole 131 , and is used to provide spring force for the lock hook 140 to return to the unlocking position or the changing position.

[0039] The rain cap 160 is fixedly sleeved on the long arm end 141 . When in the locked position, the rain cap 160 is sleeved on the extending step 112 . When in the unlocked position, the extending step 112 is partially exposed outside the rain cap 160 .

[0040] A limiting ring groove 1411 is provided on the long arm end 141 , and the set screw 170 passes through the side wall of the protruding step 112 and is located in the limiting ring groove 1411 . The set screw 170 can move and rotate in the limiting ring groove 1411 , thereby switching between the unlocking positions.

[0041] The limiting steel ball 180 is fixedly arranged in the upper lock body 130; a first sliding groove 1412 is opened on the side wall of the long arm end 141, and a rotating ring groove 1413 is opened at the end of the first sliding groove 1412; a second sliding groove 1414 is opened at a position 180° relative to the first sliding groove 1412, and the second sliding groove 1414 extends to the bottom of the long arm end 141.

[0042] The magnet 190 is disposed in the bottom of the long arm end 141 , and the Hall element 200 can detect the position of the magnet 190 , thereby identifying whether the padlock is in the unlocked or locked position.

[0043] The locking assembly 210 includes a locking turn block 212 and a plurality of locking steel balls 211; each locking steel ball 211 is sequentially arranged in a through hole on the upper lock body 130, and a locking groove 1415 is opened on the long arm end 141, and the locking steel ball 211 is opposite to the locking groove 1415. When the locking steel ball 211 is partially stuck in the locking groove 1415, the lock hook 140 is in the locked position; when the locking steel ball 211 is out of the locking groove 1415, the lock hook 140 is in the unlocked position.

[0044] The locking rotary block 212 is axially connected to the upper lock body 130, and an unlocking groove 2121 is provided on the locking rotary block 212. The locking rotary block 212 faces the locking steel ball 211. When the locking rotary block 212 rotates, when the unlocking groove 2121 faces the locking steel ball 211, the locking steel ball 211 escapes from the locking groove, and the lock hook 140 is in the unlocked position. A driving groove 2122 extending outward is provided on the side of the bottom of the locking rotary block 212.

[0045] The driving assembly 220 includes a mounting block 221, a motor 222, a transfer shaft 223, a driving shaft 224, a torsion spring 225, a rotating shaft 226 and a cover plate 227, wherein the mounting block 221 is fixedly installed in the lower lock body 120, and the mounting block 221 is a hollow structure; the motor 222 is arranged in the mounting block 221; the transfer shaft 223 is connected to the output shaft of the motor 222; a limiting groove is provided on the transfer shaft 223; a limiting column is provided on the inner wall of the mounting block 221, and the limiting column is inserted into the limiting groove, wherein the limiting column can rotate a certain angle in the limiting groove, thereby limiting the switching of the transfer shaft 223 between the unlocking positions.

[0046] The driving shaft 224 is coaxially disposed with the adapter shaft 223 , and the driving shaft 224 is located above the adapter shaft 223 .

[0047] The torsion spring 225 is sleeved on the adapter shaft 223 , wherein one end of the torsion spring 225 is connected to the adapter shaft 223 , and the other end of the torsion spring 225 is connected to the drive shaft 224 ; power is transmitted between the adapter shaft 223 and the drive shaft 224 via the torsion spring 225 .

[0048] The lower end of the rotating shaft 226 is connected to the top of the driving shaft 224, and the rotating shaft 226 is driven to rotate by the driving shaft 224; the rotating shaft 226 is provided with an eccentrically distributed driving boss 2261, and the driving boss 2261 extends out of the rotating shaft 226 and is inserted into the driving groove 2122, thereby driving the locking rotating block 212 to rotate.

[0049] The cover plate 227 is fixed on the mounting block 221 and covers the motor 222 , the drive shaft 224 and the adapter shaft 223 , thereby assembling the drive assembly 220 into an integral module.

[0050] The circuit assembly 230 includes an installation shell 231, a battery 233 and an electronic circuit 232; the installation shell 231 is fixed to the bottom of the lock shell 110, and an installation cavity is formed between the installation shell 231 and the lock shell 110; the electronic circuit 232 is arranged in the installation cavity, and the electronic circuit 232 has an NB-IOT communication module, which can communicate with a remote party; the electronic circuit 232 is connected to the Hall element 200 to obtain the actual unlocking state of the lock; the electronic circuit 232 is connected to the control end of the motor 222 to control the rotation of the motor 222, and the battery 233 is used to provide power for the normal operation of the electronic circuit 232 and the motor 222.

[0051] The working process of the present invention is:

[0052] The electronic circuit 232 receives the unlocking control signal from a remote location through the built-in NB-IOT communication module. The electronic circuit 232 controls the rotation of the motor 222, which drives the adapter shaft 223 to rotate. The limit column moves from one end of the limit slot to the other end, that is, the adapter shaft 223 stops rotating after moving a certain angle, and the motor 222 stops rotating after being blocked for a short period of time.

[0053] When the lock hook 140 is not hindered by external force, the adapter shaft 223 drives the drive shaft 224 and the rotating shaft 226 to rotate in sequence through the spring force of the torsion spring 225; when the lock hook 140 is hindered by external force, the torsion spring 225 stores energy. When the external force interference is manually removed, the stored energy is released by the torsion spring 225, and the rotation of the rotating shaft 226 is automatically completed.

[0054] The eccentrically disposed drive boss 2261 on the rotating shaft 226 extends into the drive slot 2122, thereby driving the locking rotary block 212 to rotate. The unlocking slot 2121 of the locking rotary block 212 rotates to a position aligned with the locking steel ball 211. The lock hook 140 is ejected outward under the elastic force of the lock hook spring 150, and the locking steel ball 211 exits the locking groove 1415 and moves toward the unlocking slot 2121, which partially accommodates the locking steel ball 211. When the lock hook 140 is fully ejected, the limiting steel ball 180 moves from one end of the first sliding slot 1412 to the other end. The first sliding slot 1412 limits the range of movement of the lock hook 140. At this point, the lock hook 140 has completely disengaged from the locking hole 111 and is in the unlocked position. Due to the existence of the rotating ring groove 1413, the limiting steel ball 180 can rotate around the rotating ring groove 1413, so the locking hook 140 can rotate freely. The locking process is similar to the unlocking process and will not be repeated here.

[0055] The specific process of replacing the lock hook 140 is as follows:

[0056] When the lock hook 140 needs to be replaced, the operator unlocks the padlock so that the lock hook 140 is in the unlocked position, and then rotates the lock hook 140 180 degrees. At this time, the rain cap 160 moves upward with the lock hook 140, and the set screw 170 is exposed outside the rain cap 160. After the operator removes the set screw 170 with a tool, since the set screw 170 is no longer restricted in the limiting ring groove 1411, the lock hook 140 can continue to move upward. Moreover, since the second sliding groove 1414 is a through groove structure, the limiting steel ball 180 can move along the second sliding groove 1414 to the bottom until it is out of the second sliding groove 1414. At this time, the lock hook 140 is completely out of the upper lock body 130. At this time, the operator can replace the lock hook 140 and then reinstall the new lock hook 140 into the upper lock body 130. The subsequent process is basically similar and will not be repeated here.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A NB-IOT smart padlock, characterized in that: It comprises a lock housing (110), a lower lock body (120), an upper lock body (130), a lock hook (140), a rainproof cap (160), a set screw (170) and a limiting steel ball (180); A locking hole (111) is provided on one side of the top of the lock shell (110), and a protruding step (112) is provided on the other side of the top of the lock shell (110); the lower lock body (120) is fixed to the bottom opening of the lock shell (110), and a closed cavity is formed between the lower lock body (120) and the lock shell (110); the upper lock body (130) is arranged in the closed cavity, and the upper lock body (130) is provided with a lock hook mounting hole (131), the long arm end (141) of the lock hook (140) is inserted into the lock hook mounting hole (131), and the short arm end (142) of the lock hook (140) is inserted into the locking hole (111); The rainproof cap (160) is fixedly sleeved on the long arm end (141), and the rainproof cap (160) is sleeved on the extending step (112). A limiting ring groove (1411) is provided on the long arm end (141), and the set screw (170) passes through the side wall of the extending step (112) and is located in the limiting ring groove (1411). The limiting steel ball (180) is fixedly arranged in the upper lock body (130). A first sliding groove (1412) is provided on the side wall of the long arm end (141), and a rotating ring groove (1413) is provided at the end of the first sliding groove (1412); a second sliding groove (1414) is provided at a position 180° relative to the first sliding groove (1412), and the second sliding groove (1414) passes through the bottom of the long arm end (141).

2. The NB-IOT smart padlock according to claim 1, characterized in that: A threaded hole (121) is provided on the top of the lower lock body (120); and a through hole is provided on the top of the lock housing (110), and an anti-disassembly screw passes through the through hole and is inserted into the threaded hole (121).

3. The NB-IOT smart padlock according to claim 1, characterized in that: It also includes a lock hook spring (150); the lock hook spring (150) is arranged at the bottom of the lock hook mounting hole (131), and the lock hook spring (150) is in contact with the long arm end (141) and the bottom of the lock hook mounting hole (131).

4. The NB-IOT smart padlock according to claim 1, characterized in that: It also includes a locking assembly (210), which includes a locking rotating block (212), a plurality of locking steel balls (211), and a driving assembly (220) for driving the locking rotating block (212); Each locking steel ball (211) is sequentially arranged in a through hole on the upper lock body (130); a locking groove (1415) is provided on the long arm end (141); the locking steel ball (211) faces the locking groove (1415); when the locking steel ball (211) is partially locked in the locking groove (1415), the lock hook (140) is in a locked position; when all the locking steel balls (211) are out of the locking groove (1415), the lock hook (140) is in an unlocked position.

5. The NB-IOT smart padlock according to claim 4, characterized in that: The driving assembly (220) includes a mounting block (221), a motor (222), a transfer shaft (223), a driving shaft (224), a torsion spring (225), and a rotating shaft (226); The mounting block (221) is fixedly mounted in the lower lock body (120), the mounting block (221) is a hollow structure, and the motor (222) is arranged in the mounting block (221); the adapter shaft (223) is connected to the output shaft of the motor (222), the adapter shaft (223) has a limiting groove, and a limiting column is provided on the inner wall of the mounting block (221), and the limiting column is inserted into the limiting groove; The torsion spring (225) is sleeved on the transfer shaft (223), wherein one end of the torsion spring (225) is connected to the transfer shaft (223), and the other end of the torsion spring (225) is connected to the drive shaft (224); The lower end of the rotating shaft (226) is connected to the top of the driving shaft (224); the rotating shaft (226) is provided with an eccentrically distributed driving boss (2261), and the driving boss (2261) extends out of the rotating shaft (226) and is inserted into the driving groove (2122).

6. The NB-IOT smart padlock according to claim 5, characterized in that: The drive shaft (224) and the adapter shaft (223) are coaxially arranged, and the drive shaft (224) is located above the adapter shaft (223).

7. The NB-IOT smart padlock according to claim 1, characterized in that: The circuit assembly (230) includes a mounting housing (231), a magnet (190), a Hall element (200), an electronic circuit (232), and a battery (233) for providing electrical energy; The mounting shell (231) is fixed to the bottom of the lock shell (110), and a mounting cavity is formed between the mounting shell (231) and the lock shell (110); The magnetic steel (190) is arranged at the bottom of the long arm end (141), the electronic circuit (232) is arranged in the installation cavity, the electronic circuit (232) is connected to the Hall element (200), and the electronic circuit (232) is connected to the control end of the motor (222).

8. The NB-IOT smart padlock according to claim 1, characterized in that: The electronic circuit (232) has a built-in NB-IOT communication module.

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