Smart door lock

Abstract

The present invention relates to an intelligent door lock, comprising a front handle, a lock body, a rotating shaft, an automatic unlocking device, a clutch device, a rear handle, a lock core and a knob, wherein the rotating shaft is connected to a lock tongue assembly of the lock body, and the rotating shaft controls the extension and retraction of the lock tongue of the lock tongue assembly; when manually unlocking, the user rotates the rear handle, and the rear handle drives the clutch device to operate, so that the rotating shaft and the output shaft are separated, and then the user drives the lock core to rotate by rotating the knob, and the lock core can drive the lock tongue to retract to achieve unlocking, and the unlocking does not affect the automatic unlocking device, thereby avoiding damage to the automatic unlocking device and extending the service life of the automatic unlocking device.

Description

Technical Field

[0001] The invention relates to an intelligent door lock. Background Art

[0002] The existing smart door lock has a built-in motor on the back panel. After the user is identified by an unlocking identification device such as fingerprint, face recognition or password, the motor drives the lock core to move, and the lock core controls the lock tongue of the lock body to retract to achieve the unlocking operation. The disadvantage of the above-mentioned smart door lock is that the motor is located on the back panel and it takes a long time for the motor to drive the lock core to unlock.

[0003] Another existing smart door lock has a built-in motor in its lock body. After the user is identified through an unlocking identification device such as fingerprint, face recognition or password, the motor drives the lock tongue of the lock body to retract to achieve the unlocking operation. The disadvantage is that the driving torque of the motor is small and it is difficult to unlock the door when it is deformed. Summary of the invention

[0004] The object of the present invention is to provide an intelligent door lock which has short unlocking time and is easy to unlock.

[0005] The object of the present invention is achieved in that:

[0006] An intelligent door lock, comprising a front handle, a lock body, a rotating shaft, an automatic unlocking device, a clutch device, a rear handle, a lock core and a knob, wherein the rotating shaft is connected to a lock tongue assembly of the lock body, and the rotating shaft controls the extension and retraction of the lock tongue assembly;

[0007] The automatic unlocking device comprises a housing, a motor, a reduction gear set and an output shaft, wherein the reduction gear set and the output shaft are arranged in the housing, and the motor drives the output shaft to rotate through the reduction gear;

[0008] The rotating shaft and the output shaft are connected or separated by a clutch device;

[0009] The front handle is rotatably arranged at the front side of the lock body, and the front handle is connected to the clutch device. The front handle rotates to control the clutch device to connect or disconnect the rotating shaft and the output shaft.

[0010] The rear handle is rotatably arranged at the rear side of the lock body, and the rear handle is connected to the clutch device. The rear handle rotates to control the clutch device to connect or separate the rotating shaft and the output shaft.

[0011] The lock core is arranged on the lock body, and the knob is rotatably arranged on the rear side of the lock body. The knob is connected to the lock core, and the knob drives the lock core to move. The movement of the lock core controls the extension and retraction of the lock tongue of the lock tongue assembly.

[0012] When automatically unlocking, the motor drives the output shaft to rotate through the reduction gear set, so that the output shaft outputs a large torque to drive the rotating shaft to rotate, and the rotating shaft drives the lock tongue to retract to achieve unlocking. The operation is very simple.

[0013] When manually unlocking, the user rotates the front handle, which drives the clutch device to separate the rotating shaft and the output shaft. Then the user uses the key to rotate the lock core, and the lock core can drive the lock tongue to contract to unlock. Unlocking does not affect the automatic unlocking device, thereby avoiding damage to the automatic unlocking device and extending the service life of the automatic unlocking device.

[0014] When manually unlocking, the user rotates the rear handle, which drives the clutch device to separate the rotating shaft and the output shaft. Then the user rotates the knob to drive the lock core to rotate, and the lock core can drive the lock tongue to contract to achieve unlocking. Unlocking does not affect the automatic unlocking device, thereby avoiding damage to the automatic unlocking device and extending the service life of the automatic unlocking device.

[0015] The purpose of the present invention can also be solved by the following technical measures:

[0016] Furthermore, the automatic unlocking device also includes a closing cover, and the housing is provided with an installation opening corresponding to the output shaft position for facilitating the installation of the clutch device, and the closing cover is detachably arranged at the installation opening.

[0017] Furthermore, the clutch device comprises an end cover, a spring and a push block, the end cover is provided with a socket, a first toothed ring is arranged around the socket of the end cover, a second toothed ring is arranged at the end of the rotating shaft, and a sliding cavity is arranged along the length direction of the output shaft;

[0018] The rotating shaft is placed in the sliding cavity, the front end of the rotating shaft extends out of the sliding cavity to connect with the locking tongue assembly, the spring is placed in the sliding cavity and sleeved on the rotating shaft, one end of the spring abuts against the inner wall of the sliding cavity, and the other end of the spring abuts against the second tooth ring, and the spring constitutes a reset mechanism of the rotating shaft;

[0019] The end cover is arranged at the entrance of the sliding cavity to close the sliding cavity, and the rear end of the rotating shaft faces the socket;

[0020] The closing cover has a sliding channel at the position corresponding to the socket, and the push block is placed in the sliding channel. The push block slides along the sliding channel, thereby pushing the rotating shaft to move, causing the first tooth ring and the second tooth ring to engage or disengage, thereby realizing the connection or separation between the rotating shaft and the output shaft.

[0021] Furthermore, the clutch device also includes a slip ring, a first connecting gear ring is provided at the end of the rotating shaft, the slip ring is provided with a second connecting gear ring and the second gear ring, the slip ring is sleeved on the rotating shaft, the first connecting gear ring and the second connecting gear ring are meshed with each other, the rotating shaft and the slip ring are connected together, one end of the spring rests on the slip ring, and the other end of the spring rests on the inner wall of the sliding cavity.

[0022] Furthermore, positioning holes are spaced apart on the periphery of the output shaft at the entrance of the sliding cavity, and positioning columns are spaced apart on the end cover, and the positioning columns are inserted into the positioning holes to achieve connection between the end cover and the output shaft.

[0023] Furthermore, the inner wall of the sliding channel is provided with positioning grooves at intervals along its length direction, and the outer wall of the push block is provided with positioning convex edges at intervals along its length direction. The positioning convex edges are inserted into the positioning grooves, and the positioning grooves limit the sliding direction of the positioning convex edges, thereby limiting the sliding direction of the push block.

[0024] Furthermore, it also includes a front core, a rear core and a square core seat, the square core seat is provided with a square hole, the square core seat is arranged in front of the push block, the square core seat and the push block are on the same axis, the end surface of the square core seat facing the push block is provided with a first inclined surface protrusion at intervals, a first inclined surface groove is formed between the first inclined surface protrusion and the first inclined surface protrusion, the end surface of the push block facing the square core seat is provided with a second inclined surface at intervals, a second inclined surface groove is formed between the second inclined surface protrusion and the second inclined surface protrusion;

[0025] The front end of the front core is connected to the front handle, and the rear end of the front core passes through the inner cavity of the rotating shaft, the socket and the push block in sequence and is inserted into the square hole of the square core seat, so that the front handle is connected to the square core seat through the front core;

[0026] The rear end of the rear core is connected to the rear handle, and the front end of the rear core is inserted into the square hole of the direction seat, so that the rear handle is connected to the direction seat through the rear core;

[0027] The front handle drives the square core seat to rotate through the front core, so that the first inclined surface protrusion of the square core seat abuts against the second inclined surface protrusion of the push block, the square core seat pushes the push block, the push block pushes the rotating shaft to move forward, the first toothed ring and the second toothed ring are separated, and the rotating shaft and the output shaft are separated;

[0028] The rear handle drives the square core seat to rotate through the rear core, so that the first inclined surface protrusion of the square core seat abuts against the second inclined surface protrusion of the push block, the square core seat pushes the push block, the push block pushes the rotating shaft to move forward, the first toothed ring and the second toothed ring are separated, and the rotating shaft and the output shaft are separated.

[0029] The front handle and the rear handle drive the square core seat to rotate. During the rotation of the square core seat, when the first inclined protrusion of the square core seat abuts against the second inclined protrusion of the push block, the square core seat pushes the push block forward. When the first inclined protrusion of the square core seat enters the second inclined groove of the push block, the second inclined protrusion of the push block enters the first inclined groove of the push block, and the push block moves backward. When the push block moves forward, the push block pushes the rotating shaft forward to separate the rotating shaft and the output shaft. When the push block moves backward, the spring pushes the rotating shaft backward to connect the rotating shaft and the output shaft, thereby realizing the clutch function, avoiding the lock core unlocking process from affecting the automatic unlocking device, and greatly extending the service life of the smart door lock.

[0030] Furthermore, it also includes a rear panel and a locking device, the rear panel has a lock cavity, the upper part of the lock cavity has an upper opening, and the lower part of the lock cavity has a lower opening, the locking device includes a reset spring, a locking plate and a locking pin, the rear handle is rotatably arranged on the rear panel, the locking plate is connected to the rear handle, the locking plate is located above the upper opening, the locking plate is provided with a protrusion corresponding to the upper opening position, the knob is rotatably arranged on the rear panel, and the knob has a limiting groove corresponding to the lower opening position.

[0031] The lock pin is placed in the lock cavity, the reset spring is placed in the lock cavity and sleeved on the lock pin, one end of the reset spring abuts against the lock pin, and the other end of the reset spring abuts against the inner wall of the lock cavity, the reset spring constitutes a reset mechanism of the lock pin, the upper end of the lock pin extends out of the upper opening and abuts against the protrusion, and the lower end of the lock pin passes through the lower opening and is inserted into the limit groove to achieve the locking function;

[0032] When the rear handle rotates, the locking piece rotates with the rear handle, so that the protrusion moves away from the upper opening, and the spring pushes the locking pin to move upward. The upper end of the locking pin extends out of the upper opening, and the lower end of the locking pin leaves the limiting groove, realizing the unlocking function, and the knob can rotate freely.

[0033] Furthermore, it also includes an anti-blocking device, which includes an upper gear, a lower gear, a shaft core and a blocking spring, wherein the shaft core is arranged in the inner cavity of the housing, the blocking spring, the lower gear and the upper gear are sequentially sleeved on the shaft core, the lower end surface of the upper gear is spaced apart with inclined pits, the upper end surface of the lower gear is spaced apart with inclined protrusions, the inclined protrusions are inserted into the inclined pits, and the upper gear is connected to the lower gear;

[0034] One end of the spring abuts against the lower gear, and the other end of the spring abuts against the inner wall of the housing, and the locking spring constitutes a reset mechanism for the lower gear;

[0035] The motor shaft of the motor is provided with a screw, the screw is meshed with the input end of the reduction gear set, the output end of the reduction gear set is meshed with the lower gear, the upper gear is meshed with the output shaft, when blocked, the upper gear and the output shaft cannot rotate, the motor overcomes the elastic force of the blocking spring and drives the lower gear to rotate through the reduction gear set, so that the inclined surface protrusion repeatedly enters and leaves the inclined surface pit, and the lower gear is realized to rotate idly.

[0036] When stalled, the upper gear and the output shaft cannot rotate. At this time, the motor overcomes the elastic force of the stall spring and drives the lower gear to rotate through the reduction gear set, causing the inclined protrusion to repeatedly enter and leave the inclined pit, achieving idling of the lower gear, thereby keeping the motor in normal working condition, avoiding motor blockage, and greatly improving the service life of the motor.

[0037] Furthermore, it also includes a transmission gear, the reduction gear group includes a plurality of reduction gears, the reduction gears are meshed with each other, one end of the transmission gear is meshed with the output shaft, and the other end of the transmission gear is meshed with the upper gear.

[0038] Furthermore, it also includes a front panel and an unlocking identification device, the front handle is rotatably arranged on the front panel, the unlocking identification device is arranged on the front panel, the unlocking identification device is electrically connected to the motor, and the unlocking identification device controls the action of the motor.

[0039] The beneficial effects of the present invention are as follows:

[0040] In the present invention, when automatically unlocking, the motor drives the output shaft to rotate through the reduction gear set, so that the output shaft outputs a large torque to drive the rotating shaft to rotate, and the rotating shaft drives the lock tongue to contract to achieve unlocking. The operation is very simple and the unlocking time is shortened.

[0041] According to the present invention, when manually unlocking, the user rotates the front handle, and the front handle drives the clutch device to operate, so that the rotating shaft and the output shaft are separated. Then the user uses the key to drive the lock core to rotate, and the lock core can drive the lock tongue to contract to achieve unlocking. Moreover, unlocking does not affect the automatic unlocking device, thereby avoiding damage to the automatic unlocking device and extending the service life of the automatic unlocking device.

[0042] According to the present invention, when manually unlocking, the user rotates the rear handle, and the rear handle drives the clutch device to operate, so that the rotating shaft and the output shaft are separated. Then the user drives the lock core to rotate by rotating the knob, and the lock core can drive the lock tongue to contract to achieve unlocking. Moreover, unlocking does not affect the automatic unlocking device, thereby avoiding damage to the automatic unlocking device and extending the service life of the automatic unlocking device.

[0043] According to the present invention, when the rotor is blocked, the upper gear and the output shaft cannot rotate. At this time, the motor overcomes the elastic force of the blocking spring and drives the lower gear to rotate through the reduction gear set, so that the inclined surface protrusion repeatedly enters and leaves the inclined surface pit, and the lower gear is realized to rotate idly, so that the motor can maintain a normal working state, and ensure that the motor can maintain a rotating state when the load is too large, so as to avoid damage to the motor and the gear due to the blocking and greatly improve the service life of the motor.

[0044] According to the present invention, the front handle and the rear handle drive the square core seat to rotate, and during the rotation of the square core seat, when the first inclined protrusion of the square core seat abuts against the second inclined protrusion of the push block, the square core seat pushes the push block forward, and when the first inclined protrusion of the square core seat enters the second inclined groove of the push block, the second inclined protrusion of the push block enters the first inclined groove of the push block, and the push block moves backward. When the push block moves forward, the push block pushes the rotating shaft forward to separate the rotating shaft and the output shaft, and when the push block moves backward, the spring pushes the rotating shaft backward to connect the rotating shaft and the output shaft, thereby realizing the clutch function, avoiding the lock core unlocking process from affecting the automatic unlocking device, and greatly extending the service life of the smart door lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of a smart door lock (locked state).

[0046] Figure 2 This is a cross-sectional diagram of a smart door lock (locked state).

[0047] Figure 3 This is a cross-sectional diagram of the smart door lock from another angle (locked state).

[0048] Figure 4 This is the exploded view of the smart door lock (locked state).

[0049] Figure 5 This is another angled exploded view of the smart door lock (locked state).

[0050] Figure 6 This is a partial schematic diagram of the smart door lock (locked state).

[0051] Figure 7 for Figure 6 Cross-sectional diagram of (locked state).

[0052] Figure 8 for Figure 6 Another cross-sectional view of the device (locked state).

[0053] Fig. 9 for Figure 6 Schematic diagram of disassembly (locked state).

[0054] Fig.10 for Figure 6 Another angle diagram of the decomposition (locked state).

[0055] Fig.11 This is a cross-sectional diagram of the rear handle, knob and rear door panel of the smart door lock (locked state).

[0056] Fig.12 This is a schematic diagram of the rear door panel of the smart door lock from another angle (locked state).

[0057] Fig.13 for Fig.11 Exploded view of the (locked state).

[0058] Fig.14 This is a schematic diagram of a smart door lock (unlocked state).

[0059] Fig.15 This is a cross-sectional diagram of a smart door lock (unlocked state).

[0060] Fig.16 This is a cross-sectional diagram of the smart door lock from another angle (unlocked state).

[0061] Fig.17 This is a partial schematic diagram of the smart door lock (unlocked state).

[0062] Fig.18 for Fig.17 Schematic cross-sectional view of (unlocked state).

[0063] Fig.19 for Fig.17 Another angle cross-sectional schematic diagram of (unlocked state).

[0064] Fig. 20 This is a schematic diagram of the disassembled automatic unlocking device and anti-jamming device of the smart door lock.

[0065] Fig.21 This is a schematic diagram of the automatic unlocking device and anti-jamming device of the smart door lock from another angle.

[0066] Fig. 22 This is a partial cross-sectional view of the smart door lock (non-blocked state).

[0067] Fig.23 A partial cross-sectional view of the smart door lock (stuck state). DETAILED DESCRIPTION

[0068] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0069] Example, combined with Figures 1 to 23 As shown, a smart door lock includes a front handle 1, a front panel 11, an unlocking identification device 12, a lock body 2, a rotating shaft 3, an automatic unlocking device 4, a clutch device 5, an anti-jamming device 6, a lock core 21, a rear handle 7, a knob 71, a rear panel 72, a locking device 8, a front core 13, a rear core 73 and a square core seat 9.

[0070] The front panel 11 is located at the front side of the lock body 2, the front handle 1 is rotatably connected to the front panel 11, and the unlocking identification device 12 is arranged on the front panel 11. The unlocking identification device 12 is a password, fingerprint or face recognition device.

[0071] The rear panel 72 is provided with a lock cavity 74, an upper opening 741 is provided at the upper portion of the lock cavity 74, and a lower opening 742 is provided at the lower portion of the lock cavity 74. The rear panel 72 is located at the rear side of the lock body 2, the rear handle 7 is rotatably arranged on the rear panel 72 and is located above the upper opening 741, the knob 71 is rotatably arranged on the rear panel 72 and is located below the lower opening 742, and a limiting groove 711 is provided on the knob 71 corresponding to the position of the lower opening 742.

[0072] The locking device 8 includes a return spring 81, a locking plate 82 and a locking pin 83. The locking plate 82 is connected to the rear handle 7. The locking plate 82 is located above the upper opening 741. The locking plate 82 is provided with a protrusion 821 corresponding to the position of the upper opening 741. The locking pin 83 is placed in the lock cavity 74. The return spring 81 is placed in the lock cavity 74 and is sleeved on the lock pin 83. One end of the return spring 81 abuts against the lock pin 83, and the other end of the return spring 81 abuts against the inner wall of the lock cavity 74. The return spring 81 constitutes a return mechanism for the lock pin 83.

[0073] The upper end of the lock pin 83 extends out of the upper opening 741 and abuts against the protrusion 821, and the lower end of the lock pin 83 passes through the lower opening 742 and is inserted into the limit groove 711 to achieve the locking function.

[0074] When the rear handle 7 rotates, the locking piece 82 rotates with the rear handle 7, so that the protrusion 821 moves away from the upper opening 741, and the spring pushes the locking pin 83 to move upward. The upper end of the locking pin 83 extends out of the upper opening 741, and the lower end of the locking pin 83 leaves the limiting groove 711, realizing the unlocking function, and the knob 71 can rotate freely.

[0075] The automatic unlocking device 4 includes a closing cover 41, a housing 42, a motor 43, a reduction gear set 44, an output shaft 45 and a transmission gear 46. The output shaft 45 is provided with a sliding cavity 451 along its length direction. The output shaft 45 is provided with positioning holes 452 at intervals on the periphery of the entrance of the sliding cavity 451. The reduction gear set 44 includes a plurality of reduction gears 441, which are meshed with each other. The reduction gear set 44, the output shaft 45 and the transmission gear 46 are placed in the inner cavity of the housing 42.

[0076] The anti-jamming device 6 includes an upper gear 61, a lower gear 62, a shaft core 63 and a locking spring 64. The shaft core 63 is arranged in the inner cavity of the outer shell 42. The locking spring 64, the lower gear 62 and the upper gear 61 are sequentially sleeved on the shaft core 63. The lower end surface of the upper gear 61 is spaced apart with inclined pits 611, and the upper end surface of the lower gear 62 is spaced apart with inclined protrusions 621. The inclined protrusions 621 are inserted into the inclined pits 611. The upper gear 61 and the lower gear 62 are connected. One end of the locking spring 64 abuts against the lower gear 62, and the other end of the locking spring 64 abuts against the inner wall of the outer shell 42. The locking spring 64 constitutes a reset mechanism for the lower gear 62.

[0077] The motor 43 is electrically connected to the unlocking identification device 12, and the motor shaft of the motor 43 is provided with a screw 431, the screw 431 is meshed with the input end of the reduction gear set 44, the output end of the reduction gear set 44 is meshed with the lower gear 62, the upper gear 61 is meshed with one end of the transmission gear 46, and the other end of the transmission gear 46 is meshed with the output shaft 45.

[0078] The housing 42 is provided with an installation opening 421 corresponding to the output shaft 45 for facilitating installation of the clutch device 5 , and the closing cover 41 is detachably disposed at the installation opening 421 .

[0079] When stalled, the upper gear 61 and the output shaft 45 cannot rotate, and the motor 43 overcomes the elastic force of the stall spring 64 and drives the lower gear 62 to rotate through the reduction gear set 44, so that the inclined protrusion 621 repeatedly enters and leaves the inclined pit 611, thereby achieving idling of the lower gear 62.

[0080] The clutch device 5 includes an end cover 51, a spring 52, a push block 53 and a slip ring 54. The end cover 51 is provided with a socket 511. The end cover 51 is provided with a first tooth ring 512 around the socket 511. The end cover 51 is provided with positioning columns 513 at intervals. The end cover 51 is provided at the entrance of the sliding cavity 451. The positioning columns 513 are inserted into the positioning holes 452 to achieve the connection between the end cover 51 and the output shaft 45 and close the sliding cavity 451.

[0081] The end of the rotating shaft 3 is provided with a first connecting toothed ring 31, and the slip ring 54 is provided with a second connecting toothed ring 541 and a second toothed ring 542. The slip ring 54 is sleeved on the rotating shaft 3, and the first connecting toothed ring 31 and the second connecting toothed ring 541 are meshed with each other, and the rotating shaft 3 and the slip ring 54 are connected together.

[0082] The rotating shaft 3 is placed in the sliding cavity 451, and the front end of the rotating shaft 3 extends out of the sliding cavity 451 to connect to the lock tongue assembly of the lock body 2. The spring 52 is placed in the sliding cavity 451 and sleeved on the rotating shaft 3. One end of the spring 52 abuts against the slip ring 54, and the other end of the spring 52 abuts against the inner wall of the sliding cavity 451. The spring 52 constitutes a reset mechanism for the rotating shaft 3, and the rear end of the rotating shaft 3 faces the socket 511.

[0083] The closing cover 41 is provided with a sliding channel 411 at a position corresponding to the socket 511, and the inner wall of the sliding channel 411 is provided with positioning grooves 412 at intervals along its length direction, and the outer wall of the push block 53 is provided with positioning convex edges 531 at intervals along its length direction. The push block 53 is placed in the sliding channel 411, and the positioning convex edge 531 is inserted into the positioning groove 412. The positioning groove 412 limits the sliding direction of the positioning convex edge 531, thereby limiting the sliding direction of the push block 53 along the sliding channel 411.

[0084] The push block 53 slides along the sliding channel 411 , thereby pushing the rotating shaft 3 to move, causing the first toothed ring 512 and the second toothed ring 542 to mesh or disengage, thereby achieving connection or separation between the rotating shaft 3 and the output shaft 45 .

[0085] The square core seat 9 is provided with a square hole 93, and the square core seat 9 is arranged in front of the push block 53. The square core seat 9 and the push block 53 are on the same axis, and the end surface of the square core seat 9 facing the push block 53 is provided with a first inclined surface protrusion 91, and a first inclined surface groove 92 is formed between the first inclined surface protrusion 91 and the first inclined surface protrusion 91, and the end surface of the push block 53 facing the square core seat 9 is provided with a second inclined surface protrusion 532, and a second inclined surface groove 533 is formed between the second inclined surface protrusion 532 and the second inclined surface protrusion 532.

[0086] The front end of the front core 13 is connected to the front handle 1, and the rear end of the front core 13 passes through the inner cavity of the rotating shaft 3, the socket 511 and the push block 53 in sequence and is inserted into the square hole 93 of the square core seat 9, so that the front handle 1 is connected to the square core seat 9 through the front core 13.

[0087] The rear end of the rear core 73 is connected to the rear handle 7 , and the front end of the rear core 73 is inserted into the square hole 93 of the direction seat, so that the rear handle 7 is connected to the direction seat through the rear core 73 .

[0088] The front handle 1 drives the square core seat 9 to rotate through the front core 13, so that the first inclined protrusion 91 of the square core seat 9 abuts against the second inclined protrusion 532 of the push block 53, and the square core seat 9 pushes the push block 53, and the push block 53 pushes the rotating shaft 3 to move forward, and the first tooth ring 512 and the second tooth ring 542 are separated, and the rotating shaft 3 and the output shaft 45 are separated.

[0089] The rear handle 7 drives the square core seat 9 to rotate through the rear core 73, so that the first inclined protrusion 91 of the square core seat 9 abuts against the second inclined protrusion 532 of the push block 53, and the square core seat 9 pushes the push block 53, and the push block 53 pushes the rotating shaft 3 to move forward, separating the first tooth ring 512 and the second tooth ring 542, and separating the rotating shaft 3 and the output shaft 45.

[0090] The lock core 21 is arranged on the lock body 2, and the knob 71 is connected to the lock core 21. The knob 71 drives the lock core 21 to move, and the movement of the lock core 21 controls the extension and retraction of the lock tongue 100 of the lock tongue assembly.

[0091] Working principle:

[0092] Automatic unlocking:

[0093] The user unlocks the door through the unlocking identification device 12. After the unlocking is successful, the unlocking identification device 12 sends a signal to the motor 43. The motor 43 drives the output shaft 45 to rotate through the reduction gear set 44. Since the first tooth ring 512 of the output shaft 45 and the second tooth ring 542 of the rotating shaft 3 are engaged, the rotating shaft 3 rotates with the output shaft 45, thereby controlling the lock tongue 100 of the lock tongue assembly to retract and achieve unlocking.

[0094] Unlocking the door from outside:

[0095] The user rotates the front handle 1, which drives the square core seat 9 to rotate through the front core 13, so that the first inclined protrusion 91 of the square core seat 9 abuts against the second inclined protrusion 532 of the push block 53, and the square core seat 9 pushes the push block 53, and the push block 53 pushes the rotating shaft 3 to move forward, so that the first tooth ring 512 and the second tooth ring 542 are separated, thereby realizing the separation of the rotating shaft 3 and the output shaft 45.

[0096] At this time, the user inserts the key into the lock core 21 and rotates the key. The lock core 21 controls the lock tongue 100 of the lock tongue assembly to retract, thereby unlocking the lock.

[0097] Indoor unlocking:

[0098] The user rotates the rear handle 7, and the rear handle 7 drives the square core seat 9 to rotate through the rear core 73, so that the first inclined surface protrusion 91 of the square core seat 9 abuts against the second inclined surface protrusion 532 of the push block 53, and the square core seat 9 pushes the push block 53, and the push block 53 pushes the rotating shaft 3 to move forward, so that the first tooth ring 512 and the second tooth ring 542 are separated, thereby realizing the separation of the rotating shaft 3 and the output shaft 45.

[0099] When the rear handle 7 rotates, the locking plate 82 rotates with the rear handle 7, so that the protrusion 821 moves away from the upper opening 741, and the spring 52 pushes the locking pin 83 to move upward. The upper end of the locking pin 83 extends out of the upper opening 741, and the lower end of the locking pin 83 leaves the limiting groove 711, thereby realizing the unlocking function, and the knob 71 can rotate freely. Finally, the user rotates the knob 71, and the knob 71 drives the lock core 21 to move. The action of the lock core 21 controls the contraction of the lock tongue 100 of the lock tongue assembly to realize unlocking.

[0100] To unlock the door indoors, the rear handle 7 must be rotated first, and then the knob 71 must be rotated to unlock the door, thereby preventing thieves from unlocking the door through the peephole and greatly improving the security of the smart lock.

[0101] High torque function:

[0102] Since the motor 43 drives the output shaft 45 to rotate through the reduction gear set 44, the torque of the output shaft 45 is increased by the reduction gear set 44 to achieve a high torque function. The high torque output shaft 45 drives the rotating shaft 3 to rotate, making it easy to unlock.

[0103] Anti-blocking function:

[0104] When stalled, the upper gear 61 and the output shaft 45 cannot rotate. At this time, the motor 43 overcomes the elastic force of the stall spring 5264 and drives the lower gear 62 to rotate through the reduction gear set 44, so that the inclined protrusion 621 repeatedly enters and leaves the inclined pit 611, and the lower gear 62 is realized to idle, so that the motor 43 maintains a normal working state, ensuring that the motor 43 keeps rotating when the load is too large, avoiding damage to the motor 43 and the gear due to stalling, and greatly improving the service life of the motor 43.

Claims

1. An intelligent door lock, comprising a front handle, a lock body, a rotating shaft, an automatic unlocking device, a clutch device, a rear handle, a lock core and a knob, characterized in that: The rotating shaft is connected to the lock tongue assembly of the lock body, and the rotating shaft controls the extension and retraction of the lock tongue of the lock tongue assembly; The automatic unlocking device comprises a housing, a motor, a reduction gear set and an output shaft, wherein the reduction gear set and the output shaft are arranged in the housing, and the motor drives the output shaft to rotate through the reduction gear; The rotating shaft and the output shaft are connected or separated by a clutch device; The front handle is rotatably arranged at the front side of the lock body, and the front handle is connected to the clutch device. The front handle rotates to control the clutch device to connect or disconnect the rotating shaft and the output shaft. The rear handle is rotatably arranged at the rear side of the lock body, and the rear handle is connected to the clutch device. The rear handle rotates to control the clutch device to connect or separate the rotating shaft and the output shaft. The lock core is arranged on the lock body, and the knob is rotatably arranged on the rear side of the lock body. The knob is connected to the lock core, and the knob drives the lock core to move. The lock core movement controls the extension and retraction of the lock tongue of the lock tongue assembly. The invention also comprises a rear panel and a locking device, wherein the rear panel is provided with a lock cavity, an upper opening is provided at the upper part of the lock cavity, and a lower opening is provided at the lower part of the lock cavity, wherein the locking device comprises a reset spring, a locking plate and a locking pin, wherein the rear handle is rotatably arranged on the rear panel, the locking plate is connected to the rear handle, the locking plate is located above the upper opening, a protrusion is provided on the locking plate corresponding to the position of the upper opening, the knob is rotatably arranged on the rear panel, and a limiting groove is provided on the knob corresponding to the position of the lower opening; The lock pin is placed in the lock cavity, the reset spring is placed in the lock cavity and sleeved on the lock pin, one end of the reset spring abuts against the lock pin, and the other end of the reset spring abuts against the inner wall of the lock cavity, the reset spring constitutes a reset mechanism of the lock pin, the upper end of the lock pin extends out of the upper opening and abuts against the protrusion, and the lower end of the lock pin passes through the lower opening and is inserted into the limit groove to achieve the locking function; When the rear handle rotates, the rotating shaft and the conveying shaft are separated, and the locking piece rotates with the rear handle, so that the protrusion moves away from the upper opening, and the spring pushes the locking pin to move upward, so that the upper end of the locking pin extends out of the upper opening, and the lower end of the locking pin leaves the limiting groove, realizing the unlocking function, and the knob can rotate freely; It also includes a front panel and an unlocking identification device. The front handle is rotatably arranged on the front panel, the unlocking identification device is arranged on the front panel, the unlocking identification device is electrically connected to the motor, and the unlocking identification device controls the action of the motor.

2. The smart door lock according to claim 1, characterized in that: The automatic unlocking device also includes a closing cover. The housing is provided with an installation opening corresponding to the output shaft for facilitating the installation of the clutch device. The closing cover is detachably arranged at the installation opening.

3. The smart door lock according to claim 2, characterized in that: The clutch device includes an end cover, a spring and a push block, the end cover is provided with a socket, a first toothed ring is arranged around the socket of the end cover, the output shaft is provided with a sliding cavity along its length direction, the clutch device also includes a slip ring, a first connecting toothed ring is arranged at the end of the rotating shaft, the slip ring is provided with a second connecting toothed ring and a second toothed ring, the slip ring is sleeved on the rotating shaft, the first connecting toothed ring and the second connecting toothed ring are meshed with each other, and the rotating shaft and the slip ring are connected together; The rotating shaft is placed in the sliding cavity, the front end of the rotating shaft extends out of the sliding cavity to connect with the locking tongue assembly, the spring is placed in the sliding cavity and sleeved on the rotating shaft, one end of the spring abuts against the slip ring, and the other end of the spring abuts against the inner wall of the sliding cavity, and the spring constitutes a reset mechanism of the rotating shaft; The end cover is arranged at the entrance of the sliding cavity to close the sliding cavity, and the rear end of the rotating shaft faces the socket; The closing cover has a sliding channel at the position corresponding to the socket, and the push block is placed in the sliding channel. The push block slides along the sliding channel, thereby pushing the rotating shaft to move, causing the first tooth ring and the second tooth ring to engage or disengage, thereby realizing the connection or separation between the rotating shaft and the output shaft.

4. The smart door lock according to claim 3, characterized in that: The output shaft is provided with positioning holes at intervals on the periphery of the entrance of the sliding cavity, and the end cover is provided with positioning columns at intervals. The positioning columns are inserted into the positioning holes to achieve the connection between the end cover and the output shaft.

5. The smart door lock according to claim 3, characterized in that: The inner wall of the sliding channel is provided with positioning grooves at intervals along its length direction, and the outer wall of the push block is provided with positioning convex edges at intervals along its length direction. The positioning convex edges are inserted into the positioning grooves, and the positioning grooves limit the sliding direction of the positioning convex edges, thereby limiting the sliding direction of the push block.

6. The smart door lock according to claim 5, characterized in that: It also includes a front core, a rear core and a square core seat, the square core seat is provided with a square hole, the square core seat is arranged in front of the push block, the square core seat and the push block are on the same axis, the end surface of the square core seat facing the push block is provided with a first inclined surface protrusion at intervals, a first inclined surface groove is formed between the first inclined surface protrusion and the first inclined surface protrusion, the end surface of the push block facing the square core seat is provided with a second inclined surface at intervals, a second inclined surface groove is formed between the second inclined surface protrusion and the second inclined surface protrusion; The front end of the front core is connected to the front handle, and the rear end of the front core passes through the inner cavity of the rotating shaft, the socket and the push block in sequence and is inserted into the square hole of the square core seat, so that the front handle is connected to the square core seat through the front core; The rear end of the rear core is connected to the rear handle, and the front end of the rear core is inserted into the square hole of the direction seat, so that the rear handle is connected to the direction seat through the rear core; The front handle drives the square core seat to rotate through the front core, so that the first inclined surface protrusion of the square core seat abuts against the second inclined surface protrusion of the push block, the square core seat pushes the push block, the push block pushes the rotating shaft to move forward, the first toothed ring and the second toothed ring are separated, and the rotating shaft and the output shaft are separated; The rear handle drives the square core seat to rotate through the rear core, so that the first inclined surface protrusion of the square core seat abuts against the second inclined surface protrusion of the push block, the square core seat pushes the push block, the push block pushes the rotating shaft to move forward, the first toothed ring and the second toothed ring are separated, and the rotating shaft and the output shaft are separated.

7. The smart door lock according to claim 1, characterized in that: It also includes an anti-blocking device, which includes an upper gear, a lower gear, a shaft core and a blocking spring, wherein the shaft core is arranged in the inner cavity of the housing, the blocking spring, the lower gear and the upper gear are sequentially sleeved on the shaft core, the lower end surface of the upper gear is spaced apart with inclined pits, the upper end surface of the lower gear is spaced apart with inclined protrusions, the inclined protrusions are inserted into the inclined pits, and the upper gear is connected to the lower gear; One end of the locking spring abuts against the lower gear, and the other end of the locking spring abuts against the inner wall of the housing, and the locking spring constitutes a reset mechanism for the lower gear; The motor shaft of the motor is provided with a screw, the screw is meshed with the input end of the reduction gear set, the output end of the reduction gear set is meshed with the lower gear, the upper gear is meshed with the output shaft, when blocked, the upper gear and the output shaft cannot rotate, the motor overcomes the elastic force of the blocking spring and drives the lower gear to rotate through the reduction gear set, so that the inclined surface protrusion repeatedly enters and leaves the inclined surface pit, and the lower gear is realized to rotate idly.

8. The smart door lock according to claim 7, characterized in that: It also includes a transmission gear, the reduction gear set includes a plurality of reduction gears, the reduction gears are meshed with each other, one end of the transmission gear is meshed with the output shaft, and the other end of the transmission gear is meshed with the upper gear.

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