A smart door lock

Abstract

This invention discloses an intelligent door lock, including an outer locking mechanism and an inner locking mechanism, which are respectively located on the inner and outer sides of the door. A latch for opening and closing the door lock is provided between the outer and inner locking mechanisms. The outer locking mechanism includes an outer lock housing. In use, the user completes identity verification through a fingerprint recognition module / password input. After receiving the verification signal, the control board sends a pulse signal to the clutch mechanism, which starts working and drives the clutch pressure plate to move upward. The clutch pressure plate pushes the slide rod into the slot of the clutch lock head, locking the clutch lock head and the outer lock seat. At this time, the user can rotate the outer lock handle to open the door lock by causing the door lock latch to retract through the clutch lock head. If the user cannot complete identity verification, the slide rod is kept away from the clutch lock head by the force of the clutch spring, ensuring that the clutch lock head is completely separated from the outer lock seat. At this time, the user rotating the outer lock handle only causes the outer lock seat to rotate freely, resulting in good anti-theft effect.

Description

Technical Field

[0001] This invention relates to the field of smart lock technology, and in particular to a smart door lock. Background Technology

[0002] With the increasing demand for social security and the rapid development of IoT technology, smart locks, as an upgraded replacement for traditional mechanical locks, have gradually become an important part of modern home and commercial security systems due to their significant advantages in security, convenience and intelligence. The core function of smart locks is to authenticate identity through various methods such as fingerprints, passwords, proximity cards or mobile terminals, and drive the internal actuator to complete the unlocking action after successful verification.

[0003] However, the clutch structure of traditional smart locks has a security flaw. When not authorized by the control board, the handle cannot control the movement of the bolt within a 180° rotation range from the starting position. However, under strong external force, when the handle is twisted more than 180°, the handle will drive the internal bolt to move, resulting in the phenomenon of unlocking by unconventional means. This security risk reduces the reliability of smart locks.

[0004] Therefore, it is necessary to provide a smart door lock to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent door lock to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent door lock, comprising an outer locking mechanism and an inner locking mechanism, wherein the outer locking mechanism and the inner locking mechanism are respectively disposed on the inner and outer sides of the door, and a latch for opening and closing the door lock is provided between the outer locking mechanism and the inner locking mechanism. The outer locking mechanism includes an outer lock housing, and a first mounting groove is formed on the side wall of the outer lock housing. A mechanical lock, a clutch mechanism, an outer lock head mechanism, and a control plate are sequentially arranged from bottom to top in the first mounting groove. An outer lock handle is inserted into the outer side of the outer lock housing, and the outer lock handle is inserted into the outer lock head mechanism. Next, a clutch pressure plate is slidably disposed on the top of the clutch mechanism, and the outer lock head mechanism is located on the top of the clutch pressure plate. The inner lock mechanism includes an inner lock housing, and a second mounting groove is provided on the side wall of the inner lock housing. A first circuit board, an inner lock head mechanism, a second circuit board, and a sorting mechanism are arranged sequentially from top to bottom in the second mounting groove. An inner lock handle is movably disposed on the outside of the inner lock housing. The inner lock handle is mounted on the inner lock seat of the inner lock head mechanism. The inner lock head mechanism has the same structure as the outer lock head mechanism. A connecting rod is provided between the inner lock mechanism and the connecting hole of the clutch lock head.

[0007] As a preferred embodiment of the present invention, the outer lock housing is fixedly installed on the outside of the door. A first groove is formed on the side wall of the outer lock housing. A first placement groove is formed at the upper position of the bottom of the first mounting groove. The first placement groove passes through the first groove. The control board is arranged opposite to the first placement groove. An outer lock panel is inserted into the first groove. A digital key and a display hole are provided at the upper position of the side wall of the outer lock panel. The control board includes a key circuit and a display screen. The key circuit is opposite to the digital key. The display screen is inserted into the display hole. A first insertion hole is formed in the middle of the outer lock housing. A mounting hole is formed in the middle of the outer lock panel. The mounting hole is opposite to the first insertion hole. The outer lock head mechanism is inserted into the first insertion hole. The outer lock handle is inserted into the mounting hole. A sealing plate is provided in the first mounting groove. A sealing glue plate is provided on the outside of the sealing plate.

[0008] In a preferred embodiment of the present invention, the external lock head mechanism includes an external lock seat and a sealing plate. The sealing plate is fixedly locked in a first mounting groove by screws. A cylindrical protrusion is provided on the side wall of the external lock housing, and a bearing is disposed within the cylindrical protrusion. One end of the external lock seat passes sequentially through the sealing plate, the bearing, and the first insertion hole and extends to the outside of the external lock housing. The external lock seat includes a connecting portion and a cylindrical portion. The cylindrical portion is inserted into the bearing, and a torsion spring is sleeved on the cylindrical portion. A stop is provided on the side wall of the external lock seat, and the extended end of the torsion spring abuts against the stop. The torsion spring is located between the outer lock seat and the sealing plate. A limiting protrusion is provided in the first mounting groove. The limiting protrusion is an arc-shaped block. The connecting part has a square structure. A square hole is opened in the outer lock handle to cooperate with the connecting part. A turning hole is opened in the outer lock seat. A clutch lock head is rotatably installed in the turning hole. The clutch lock head is connected to the door lock tongue. Multiple threaded connection holes are opened on the side wall of the outer lock seat. A baffle is provided on the side wall of the outer lock seat. The baffle is locked and fixed on the outer lock seat by multiple screws screwed into the threaded connection holes.

[0009] As a preferred embodiment of the present invention, the baffle has a through hole in the center for the clutch lock head to pass through. An arc-shaped block is provided in the through hole. The clutch lock head includes a connecting head and a rotating head. The connecting head extends through the through hole to the outside of the baffle. The rotating head is located inside the baffle. A limiting block is provided on the outer circumference of the connecting head of the clutch lock head. The limiting block cooperates with the arc-shaped block to limit movement. A connecting hole is provided in the connecting head. The connecting hole is a square hole. A slot is provided on the outer circumference of the rotating head. The slot communicates with the connecting hole. A pressure block is provided on the side wall of the outer lock seat. Countersunk holes are provided at positions directly opposite to the outer circumference of the outer lock seat. The countersunk holes communicate with the turning holes, and the connection between the two forms a through groove. A mounting post is provided in the countersunk hole. A sliding rod is inserted into the mounting post. The sliding rod has a stepped shaft structure. A clutch spring is sleeved on the sliding rod. The sliding rod is directly opposite the slot of the clutch lock head.

[0010] As a preferred embodiment of the present invention, the inner lock housing is disposed on the inner side of the door. A second groove is formed on the side wall of the inner lock housing. A second insertion hole is formed at the bottom of the second groove. A second placement groove is formed at the upper position of the bottom of the second groove. A frame is disposed in the second placement groove. Multiple slots are formed at the bottom edge of the second groove. An inner lock panel is inserted into the second groove. A locking hole is formed in the middle of the inner lock panel. A protrusion in the middle of the inner lock housing is locked in the locking hole. A rotating hole is formed at the lower position of the inner lock panel. The rotating hole is directly opposite the second insertion hole. Multiple wedges are provided on the side wall of the inner lock panel. The multiple wedges are respectively inserted into the multiple slots. A cover is provided on the side wall of the inner lock housing.

[0011] As a preferred embodiment of the present invention, a protrusion is provided in the middle of the second groove, and a third insertion hole is provided in the middle of the second groove. Both the second insertion hole and the third insertion hole are connected to the second mounting groove. The inner lock head mechanism is rotatably disposed in the second mounting groove, and the inner lock seat of the inner lock head mechanism is inserted into the third insertion hole.

[0012] As a preferred embodiment of the present invention, the sorting mechanism includes a turntable, which is rotatably mounted in a second mounting groove. One end of the turntable is elliptical, and a square hole is formed in the center of the turntable. An adjustment knob is rotatably mounted in the second insertion hole of the inner lock housing. One end of the adjustment knob is inserted into the square hole of the turntable. A groove is formed on the adjustment knob, and a buckle is engaged in the groove. A return spring is provided on the outer side of the square portion of the turntable, and the top of the return spring is engaged in the second mounting groove. A fixing plate is provided on the side wall of the return spring, and a locking screw is provided in the center of the fixing plate. A switch is provided in the second mounting groove, and the spring of the switch is in contact with the outer edge of the elliptical portion of the turntable.

[0013] As a preferred embodiment of the present invention, the mechanical lock has an operating hole at its bottom, and a push rod is movably disposed inside the mechanical lock, the push rod being located below the clutch mechanism.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The intelligent door lock of this invention, in use, allows the user to complete identity verification via fingerprint recognition module / password input. After receiving the verification signal, the control board sends a pulse signal to the clutch mechanism, which then starts working and drives the clutch pressure plate to move upward. The clutch pressure plate pushes the slide rod into the slot of the clutch lock head, at which point the clutch spring is compressed, locking the clutch lock head and the outer lock seat. The user can then rotate the outer lock handle to unlock the door by retracting the lock tongue through the clutch lock head. If the user cannot complete identity verification, the slide rod, under the force of the clutch spring, remains away from the clutch lock. The clutch cylinder is fully disengaged from the outer lock seat. When the user rotates the outer lock handle, the outer lock seat will only rotate freely. Even if unconventional methods are used to operate the outer lock handle, the door lock tongue cannot be driven to unlock and open the door. At the same time, when using the key to unlock, inserting the key into the operating hole of the mechanical lock will rotate the internal mechanical structure to push the push rod. The push rod will push the moving parts inside the clutch mechanism to lift the clutch pressure plate. The clutch pressure plate will push the slide rod to engage in the slot of the clutch cylinder, locking the clutch cylinder and the outer lock seat. At this time, the user can rotate the outer lock handle to drive the door lock tongue to retract and unlock the door by rotating the clutch cylinder.

[0016] 2. The intelligent door lock described in this invention, when in use, when a person is indoors, rotating the turntable so that the larger diameter of its elliptical part abuts against the spring of the switch, the door lock is in the open state. The switch is turned on to supply power to the clutch mechanism, which pushes the clutch pressure plate upward to lift the sliding rod. The sliding rod inserts into the slot of the clutch lock head, locking the clutch lock head and the outer lock head mechanism. Only by operating the outer lock handle can the door be unlocked. When the larger diameter of the elliptical part of the turntable moves away from the spring of the switch, the door lock is in the closed state, the switch is de-energized, and the clutch mechanism cannot be activated. At this time, the clutch lock head and the outer lock head mechanism are completely disengaged. Rotating the outer lock handle can only drive the outer lock head mechanism to rotate freely. Even if unconventional methods are used to operate the outer lock handle, the door lock cannot be opened, resulting in good anti-theft effect. When a person is indoors, the inner lock handle drives the inner lock head mechanism and the clutch lock head to rotate synchronously, realizing real-time door opening and locking. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is an isometric view of the overall structure of the present invention;

[0020] Figure 3 This is a three-dimensional exploded view of the external locking mechanism structure of the present invention;

[0021] Figure 4 This is a front view of the installation position of the internal structure of the external locking mechanism of the present invention;

[0022] Figure 5 This is a three-dimensional schematic diagram of the installation position of the internal structure of the external locking mechanism of the present invention;

[0023] Figure 6 This is a three-dimensional exploded view of the internal locking mechanism structure of the present invention;

[0024] Figure 7 This is a front view of the installation position of the internal structure of the inner locking mechanism of the present invention;

[0025] Figure 8 This is a three-dimensional schematic diagram of the installation position of the internal structure of the inner locking mechanism of the present invention;

[0026] Figure 9 This is a three-dimensional schematic diagram of the external locking mechanism structure of the present invention;

[0027] Figure 10 This is a three-dimensional schematic diagram of the external locking seat structure of the present invention;

[0028] Figure 11 This is a cross-sectional view of the external lock seat structure of the present invention;

[0029] Figure 12 This is a three-dimensional cross-sectional schematic diagram of the external lock seat structure of the present invention;

[0030] Figure 13 This is a three-dimensional schematic diagram of the clutch lock head structure of the present invention;

[0031] Figure 14 This is an isometric view of the clutch lock head structure of the present invention;

[0032] Figure 15 This is a three-dimensional schematic diagram of the baffle structure of the present invention;

[0033] Figure 16 This is a three-dimensional schematic diagram showing the positional relationship between the mechanical lock, clutch mechanism, and external lock head mechanism of the present invention;

[0034] Figure 17 This is a three-dimensional schematic diagram of the sorting mechanism structure of the present invention.

[0035] In the diagram: 100, external locking mechanism; 101, external lock housing; 1011, first groove; 1012, first insertion hole; 1013, first mounting groove; 1014, first placement groove; 1015, limiting protrusion; 102, external lock panel; 1021, mounting hole; 1022, digital keypad; 1023, display hole; 103, external lock handle; 104, control board; 1041, keypad circuit; 1042, display screen; 105, mechanical lock; 1051, operating hole; 1052. 106. Push rod; 107. Clutch mechanism; 108. External lock head mechanism; 109. External lock seat; 100711. Turning hole; 100712. Countersunk hole; 100713. Threaded connection hole; 100714. Through groove; 100715. Connecting part; 100716. Cylindrical part; 100717. Stop block; 10072. Sealing plate; 10073. Torsion spring; 10074. Bearing; 10075. Baffle; 100751. Through hole; 100752. Limiting block; 10076. Pressure block; 10077. Clutch lock Head; 10771, Connecting head; 10772, Rotating head; 10773, Connecting hole; 10774, Slot; 10775, Limiting block; 1078, Mounting post; 1079, Slide rod; 108, Sealing plate; 109, Sealing plate; 110, Clutch pressure plate; 200, Inner locking mechanism; 201, Inner lock housing; 2011, Second groove; 2012, Second insertion hole; 2013, Third insertion hole; 2014, Second placement groove; 2015, Slot; 2016, Second mounting... 2017. Groove; 202. Limiting protrusion; 202. Inner lock panel; 2021. Snap hole; 2022. Wedge block; 2023. Rotary hole; 203. Inner lock handle; 204. Adjustment knob; 205. Frame; 206. First circuit board; 207. Inner lock head mechanism; 208. Second circuit board; 209. Sorting mechanism; 2091. Turntable; 2092. Switch; 2093. Return spring; 2094. Fixing plate; 2095. Locking screw; 2096. Buckle; 210. Cover. Detailed Implementation

[0036] Embodiments of the present invention will now be described with reference to the accompanying drawings. In this process, to ensure clarity and convenience, we may exaggerate the width of lines or the size of constituent elements in the drawings.

[0037] Furthermore, the terms used below are defined based on the functionality of this invention and may vary depending on the user's, operator's, or conventions. Therefore, these terms are defined based on the entire contents of this specification.

[0038] like Figures 1 to 17As shown, a smart door lock includes an outer locking mechanism 100 and an inner locking mechanism 200, which are respectively disposed on the inner and outer sides of the door. A latch is provided between the outer locking mechanism 100 and the inner locking mechanism 200, and the latch controls the lock cylinders of the outer locking mechanism 100 and the inner locking mechanism 200 to unlock. The outer locking mechanism 100 includes an outer lock housing 101, which is fixedly disposed on the outer side of the door. A first mounting groove 1013 is formed on the side wall of the outer lock housing 101, and a first recess 1011 is formed on the other side wall of the outer lock housing 101. A first placement groove 1014 is formed at the bottom upper position of the first mounting groove 1013. A first placement slot 1014 penetrates a first recess 1011. A control board 104 is disposed in the first mounting slot 1013. The control board 104 is arranged directly opposite the first placement slot 1014. An outer lock panel 102 is inserted into the first recess 1011. A digital keypad 1022 and a display hole 1023 are disposed on the upper side wall of the outer lock panel 102. The control board 104 includes a keypad circuit 1041 and a display screen 1042. The keypad circuit 1041 is directly opposite the digital keypad 1022. The keypad circuit 1041 is operated by the digital keypad 1022. The display screen 1042 is inserted into the display hole 1023 and is used to display various states of the door lock.

[0039] like Figures 3 to 5 As shown, the outer lock housing 101 has a first insertion hole 1012 in the middle, and the outer lock panel 102 has a mounting hole 1021 in the middle, with the mounting hole 1021 directly opposite the first insertion hole 1012. A mechanical lock 105, a clutch mechanism 106, and an outer lock head mechanism 107 are sequentially arranged from bottom to top in the first mounting groove 1013. The outer lock head mechanism 107 is inserted into the first insertion hole 1012. An outer lock handle 103 is inserted into the mounting hole 1021, and the outer lock handle 103 is connected to the outer lock head mechanism 107. The door lock is opened by rotating the outer lock head mechanism 107 using the outer lock handle 103. The mechanical lock 105 has an operating hole 1051 at its bottom, within which the mechanical lock 105 moves... A top rod 1052 is provided. By inserting a key into the operating hole 1051, the internal mechanical structure is rotated to push the top rod 1052. In the initial state, the top rod 1052 of the mechanical lock 105 is in contact with the movable head at the bottom of the clutch mechanism 106. A clutch pressure plate 110 is slidably provided on the top of the clutch mechanism 106. The movable head of the clutch mechanism 106 can push the clutch pressure plate 110 to slide. After the clutch mechanism 106 is powered on, the internal motor pushes the clutch pressure plate 110 to slide. The external lock head mechanism 107 is located on top of the clutch pressure plate 110. The clutch pressure plate 110 pushes the internal components of the external lock head mechanism 107 to lock with the external lock handle 103. At this time, rotating the external lock handle 103 can open the door lock and realize the door opening function.

[0040] like Figures 9 to 15As shown, the external lock head mechanism 107 includes a sealing plate 1072, which is fixed in the first mounting groove 1013 by screws. A cylindrical protrusion is provided on the side wall of the external lock housing 101, and a bearing 1074 is embedded in the cylindrical protrusion. One end of the external lock seat 1071 passes through the sealing plate 1072, the bearing 1074, and the first insertion hole 1012 in sequence and extends to the outside of the external lock housing 101. The external lock seat 1071 includes a connecting portion 10715 and a cylindrical portion 10716. The cylindrical portion 10716 is inserted into the bearing 1074. The external lock seat 1071 is rotatably disposed in the first mounting groove 1013 through the cylindrical portion 10716 cooperating with the bearing 1074. A torsion spring 107 is sleeved on the cylindrical portion 10716. 3. A stop block 10717 is provided on the side wall of the outer lock seat 1071. The protruding end of the torsion spring 1073 abuts against the stop block 10717 to limit and fix it. The torsion spring 1073 is located between the outer lock seat 1071 and the sealing plate 1072. A limiting protrusion 1015 is provided in the first mounting groove 1013. The limiting protrusion 1015 is an arc-shaped block. The limiting protrusion 1015 limits the protruding end of the torsion spring 1073 to prevent excessive torque at the protruding end of the torsion spring 1073 from causing damage and affecting the reset of the outer lock seat 1071. The connecting part 10715 has a square structure. A square hole is opened in the outer lock handle 103 to cooperate with the connecting part 10715 for insertion. The outer lock handle 103 drives the outer lock seat 1071 to rotate. The outer lock seat 1071 has a turning hole 10711, and a clutch lock head 1077 is rotatably mounted in the turning hole 10711. The clutch lock head 1077 is connected to the door lock tongue, and the door lock opening and locking actions are achieved by operating the door lock tongue through the clutch lock head 1077. The side wall of the outer lock seat 1071 has multiple threaded connection holes 10713, and a baffle 1075 is provided on the side wall of the outer lock seat 1071. The baffle 1075 is locked and fixed to the outer lock seat 1071 by multiple screws screwed into the threaded connection holes 10713. The center of the baffle 1075 has a through hole 10751 for the clutch lock head 1077 to pass through. An arc-shaped block 10752 is provided in the through hole 10751. The clutch lock head 1077 is enclosed in... The clutch lock 10777 includes a connector 10771 and a rotating head 10772. The connector 10771 extends through a through hole 10751 to the outside of a baffle 1075. The rotating head 10772 is located inside the baffle 1075. A limit block 10775 is provided on the outer circumference of the connector 10771 of the clutch lock 10777. The limit block 10775 cooperates with the arc-shaped block 10752 to limit the clutch lock 1077. A connecting hole 10773 is provided inside the connector 10771. The connecting hole 10773 is a square hole. A slot 10774 is provided on the outer circumference of the rotating head 10772. The slot 10774 communicates with the connecting hole 10773. A pressure block 1076 is provided on the side wall of the outer lock seat 1071.Countersunk holes 10712 are provided on the outer circumferential surface of the outer lock seat 1071 at positions directly opposite each other. The countersunk holes 10712 communicate with the turning holes 10711, and a through groove 10714 is formed at the connection between the two. A mounting post 1078 is provided in the countersunk hole 10712, and a slide rod 1079 is inserted into the mounting post 1078. The slide rod 1079 has a stepped shaft structure, and a clutch spring is sleeved on the slide rod 1079, which pushes the slide rod 1079 out to the outside of the mounting post 1078. The slide rod 1079 is directly opposite the slot 10774 of the clutch lock head 1077. In the initial state, one end of the slide rod 1079 extends out of the mounting post 1078 and is in contact with the clutch pressure plate 110, ensuring that the clutch lock head 1077 and the outer lock seat 1071 are completely separated. When the clutch mechanism 106 is energized, it pushes the clutch pressure plate 110 to lift the slide rod 1079, compressing the clutch spring. The top of the slide rod 1079 slides upward and inserts into the slot 10774 of the clutch lock head 1077, thereby locking the clutch lock head 1077 and the outer lock seat 1071. At this time, rotating the outer lock handle 103 will drive the outer lock seat 1071 and the clutch lock head 1077 to rotate. The clutch lock head 1077 will drive the door lock tongue to retract and open the door, realizing the door opening operation. A sealing plate 108 is provided in the first mounting groove 1013, and a sealing rubber plate 109 is provided on the outside of the sealing plate 108.

[0041] like Figures 6 to 8As shown, the inner locking mechanism 200 includes an inner lock housing 201, which is disposed on the inner side of the door. A second groove 2011 is formed on one side wall of the inner lock housing 201, and a second mounting groove 2016 is formed on the other side wall. A second insertion hole 2012 is formed at the bottom of the second groove 2011, a protrusion is formed in the middle of the second groove 2011, and a third insertion hole 2013 is formed in the middle of the second groove 2011. Both the second insertion hole 2012 and the third insertion hole 2013 communicate with the second mounting groove 2016. A second placement groove 2014 is provided at the upper part of the bottom of the second groove 2011. A frame 205 is provided in the second placement groove 2014. Multiple slots 2015 are provided at the bottom edge of the second groove 2011. An inner lock panel 202 is inserted into the second groove 2011. A locking hole 2021 is provided in the middle of the inner lock panel 202. A protrusion in the middle of the inner lock housing 201 is engaged in the locking hole 2021. A rotating hole 2023 is provided at the lower part of the upper part of the inner lock panel 202. The rotating hole 2023 is opened directly opposite the second insertion hole 2012. The sidewall is provided with multiple wedges 2022, which are respectively inserted into multiple slots 2015. The second mounting groove 2016 is provided with, from top to bottom, a first circuit board 206, an inner lock head mechanism 207, a second circuit board 208, and a sorting mechanism 209. The sidewall of the inner lock housing 201 is provided with a cover 210, which closes the second mounting groove 2016 and protects its internal components. The inner lock head mechanism 207 has the same structure as the outer lock head mechanism 107, and the inner lock head mechanism 207 is rotatably mounted in the second mounting groove 2016. The inner lock mechanism 207 has its inner lock seat inserted into the third insertion hole 2013. An inner lock handle 203 is movably provided on the outer side of the inner lock housing 201. The inner lock handle 203 is sleeved on the inner lock seat of the inner lock mechanism 207. A connecting rod is provided between the inner lock mechanism 207 and the clutch lock head 1077's connection hole 10773. The inner lock mechanism 207 and the clutch lock head 1077 are connected together by the connecting rod to achieve synchronous rotation. The inner lock handle 203 drives the inner lock mechanism 207 and the clutch lock head 1077 to rotate synchronously, realizing real-time door opening and locking.

[0042] like Figure 17As shown, the sorting mechanism 209 includes a turntable 2091, which is rotatably mounted in the second mounting groove 2016. One end of the turntable 2091 is elliptical, and a square hole is formed in the middle of the turntable 2091. An adjustment knob 204 is rotatably mounted in the second insertion hole 2012 of the inner lock housing 201. One end of the adjustment knob 204 is inserted into the square hole of the turntable 2091, and the turntable 2091 is rotated by adjusting the knob 204. The adjustment knob 204 has a [missing information - likely a design feature or design feature]. A groove is cut, and a buckle 2096 is engaged within the groove to limit the movement of the turntable 2091. A return spring 2093 is provided on the outer side of the square portion of the turntable 2091. The top of the return spring 2093 is engaged in the second mounting groove 2016. A fixing plate 2094 is provided on the side wall of the return spring 2093. A locking screw 2095 is provided in the middle of the fixing plate 2094. The fixing plate 2094 and the return spring 2093 are secured by screwing the locking screw 2095 into the bottom of the second mounting groove 2016. 3. The switch 2092 is pressed and fixed in the second mounting groove 2016. The second mounting groove 2016 is equipped with a switch 2092. The spring of the switch 2092 is in contact with the outer edge of the elliptical part of the turntable 2091. When the large diameter of the elliptical part of the turntable 2091 abuts against the spring of the switch 2092, the switch 2092 is turned on to supply power to the clutch mechanism 106. The clutch mechanism 106 pushes the clutch pressure plate 110 to move upward and lifts the slide rod 1079. The slide rod 1079 is inserted into the slot 10774 of the clutch lock head 1077. The clutch lock 1077 is locked to the outer lock mechanism 107. The door can be opened by operating the outer lock handle 103. When the large diameter of the elliptical part of the turntable 2091 is far away from the spring of the switch 2092, the switch 2092 is de-energized and the clutch mechanism 106 cannot be activated. At this time, the clutch lock 1077 is completely disengaged from the outer lock mechanism 107. Rotating the outer lock handle 103 can only drive the outer lock mechanism 107 to rotate freely. Even if the outer lock handle 103 is operated by unconventional means, the door lock cannot be opened, and the anti-theft effect is good.

[0043] Specifically, during use, the user completes authentication via fingerprint recognition module / password input. After receiving the authentication signal, the control board 104 sends a pulse signal to the clutch mechanism 106. The clutch mechanism 106 starts working and drives the clutch pressure plate 110 upward. The clutch pressure plate 110 pushes the slide rod 1079 into the slot 10774 of the clutch lock head 1077. At this time, the clutch spring is compressed, causing the clutch lock head 1077 to lock with the outer lock seat 1071. The user can then rotate the outer lock handle 103 to unlock the door by causing the door lock tongue to retract through the clutch lock head 1077. If the user cannot complete authentication, the slide rod 1079 will remain in the clutch spring. Under the force of the spring, it is kept away from the clutch lock head 1077, ensuring that the clutch lock head 1077 is completely separated from the outer lock seat 1071. At this time, when the user rotates the outer lock handle 103, it only drives the outer lock seat 1071 to rotate freely. Even if the outer lock handle 103 is operated by unconventional means, it will not be able to drive the door lock tongue to unlock and open the door. At the same time, when using the key to unlock, inserting the key into the operating hole 1051 of the mechanical lock 105 rotates the internal mechanical structure to push the push rod 1052. The push rod 1052 pushes the moving parts inside the clutch mechanism 106 to lift the clutch pressure plate 110. The clutch pressure plate 110 pushes the slide rod 1079 to engage with the slot 10 of the clutch lock head 1077. Within 774, the clutch lock head 1077 is locked to the outer lock seat 1071. At this time, when the user rotates the outer lock handle 103, the door lock tongue will retract through the clutch lock head 1077 to unlock the door, realizing the door opening function. When a person is inside, when the turntable 2091 is rotated so that its elliptical part abuts against the spring of the switch 2092, the door lock is in the open state. The switch 2092 is turned on to supply power to the clutch mechanism 106. The clutch mechanism 106 pushes the clutch pressure plate 110 upward to lift the slide rod 1079. The slide rod 1079 is inserted into the slot 10774 of the clutch lock head 1077, locking the clutch lock head 1077 to the outer lock head mechanism 107. When locked, the door can only be unlocked by operating the outer lock handle 103. When the large diameter of the elliptical part of the turntable 2091 is far away from the spring of the switch 2092, the door lock is in the closed state. The switch 2092 is de-energized and cannot start the clutch mechanism 106. At this time, the clutch lock head 1077 is completely disengaged from the outer lock head mechanism 107. Rotating the outer lock handle 103 can only drive the outer lock head mechanism 107 to rotate freely. Even if the outer lock handle 103 is operated by unconventional means, the door lock cannot be opened. The anti-theft effect is good. When a person is inside, the inner lock handle 203 drives the inner lock head mechanism 207 and the clutch lock head 1077 to rotate synchronously, realizing real-time door opening and locking.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A smart door lock, comprising an outer locking mechanism (100) and an inner locking mechanism (200), wherein the outer locking mechanism (100) and the inner locking mechanism (200) are respectively disposed on the inner and outer sides of the door, and a latch for opening and closing the door lock is provided between the outer locking mechanism (100) and the inner locking mechanism (200), characterized in that: The external locking mechanism (100) includes an external lock housing (101), the side wall of which has a first mounting groove (1013). The first mounting groove (1013) contains, from bottom to top, a mechanical lock (105), a clutch mechanism (106), an external lock head mechanism (107), and a control plate (104). An external lock handle (103) is inserted into the outside of the external lock housing (101), and the external lock handle (103) is inserted into the external lock head mechanism (107). A clutch pressure plate (110) is slidably disposed on the top of the clutch mechanism (106), and the external lock head mechanism (107) is located on top of the clutch pressure plate (110). The internal locking mechanism (200) includes... An inner lock housing (201) has a second mounting groove (2016) on its side wall. The second mounting groove (2016) is provided with a first circuit board (206), an inner lock head mechanism (207), a second circuit board (208), and a sorting mechanism (209) arranged sequentially from top to bottom. An inner lock handle (203) is movably provided on the outside of the inner lock housing (201). The inner lock handle (203) is sleeved on the inner lock seat of the inner lock head mechanism (207). The inner lock head mechanism (207) has the same structure as the outer lock head mechanism (107). A connecting rod is provided between the inner lock head mechanism (207) and the connecting hole (10773) of the clutch lock head (1077). The sorting mechanism (209) includes a turntable (2091), which is rotatably mounted in a second mounting groove (2016). One end of the turntable (2091) is elliptical, and a square hole is provided in the middle of the turntable (2091). An adjustment knob (204) is rotatably mounted in the second insertion hole (2012) of the inner lock housing (201). One end of the adjustment knob (204) is inserted into the square hole of the turntable (2091). A groove is provided on the adjustment knob (204), and a slot is provided for engaging the adjustment knob. There is a buckle (2096). A return spring (2093) is provided on the outer side of the square part of the turntable (2091). The top of the return spring (2093) is snapped into the second mounting groove (2016). A fixing plate (2094) is provided on the side wall of the return spring (2093). A locking screw (2095) is provided in the middle of the fixing plate (2094). A switch (2092) is provided in the second mounting groove (2016). The spring of the switch (2092) is attached to the outer edge of the elliptical part of the turntable (2091).

2. The smart door lock according to claim 1, characterized in that: The outer lock housing (101) is fixedly installed on the outside of the door. A first groove (1011) is provided on the side wall of the outer lock housing (101). A first placement groove (1014) is provided at the bottom upper position of the first mounting groove (1013). The first placement groove (1014) passes through the first groove (1011). The control board (104) is arranged opposite the first placement groove (1014). An outer lock panel (102) is inserted into the first groove (1011). A digital keypad (1022) and a display hole (1023) are provided at the upper position of the side wall of the outer lock panel (102). The control board ( 104) includes a button circuit (1041) and a display screen (1042). The button circuit (1041) is directly opposite the digital buttons (1022). The display screen (1042) is inserted into the display hole (1023). The outer lock housing (101) has a first insertion hole (1012) in the middle. The outer lock panel (102) has a mounting hole (1021) in the middle. The mounting hole (1021) is directly opposite the first insertion hole (1012). The outer lock head mechanism (107) is inserted into the first insertion hole (1012). The outer lock handle (103) is inserted into the mounting hole (1021). Inside, a sealing plate (108) is provided in the first mounting groove (1013), and a sealing glue plate (109) is provided on the outside of the sealing plate (108); the sorting mechanism (209) includes a turntable (2091), which is rotatably disposed in the second mounting groove (2016). One end of the turntable (2091) is elliptical, and a square hole is provided in the middle of the turntable (2091). An adjustment knob (204) is rotatably disposed in the second insertion hole (2012) of the inner lock housing (201), and one end of the adjustment knob (204) is inserted into the square hole of the turntable (2091). The adjustment knob (204) has a groove, and a buckle (2096) is engaged in the groove. A return spring (2093) is provided on the outer side of the square part of the turntable (2091). The top of the return spring (2093) is engaged in the second mounting groove (2016). A fixing plate (2094) is provided on the side wall of the return spring (2093). A locking screw (2095) is provided in the middle of the fixing plate (2094). A switch (2092) is provided in the second mounting groove (2016). The spring of the switch (2092) is in contact with the outer edge of the elliptical part of the turntable (2091).

3. The smart door lock according to claim 2, characterized in that: The external locking mechanism (107) includes an external locking seat (1071) and a sealing plate (1072). The sealing plate (1072) is fixed in the first mounting groove (1013) by screws. A cylindrical protrusion is provided on the side wall of the external locking housing (101), and a bearing (1074) is provided in the cylindrical protrusion. One end of the external locking seat (1071) passes through the sealing plate (1072), the bearing (1074) and the first insertion hole (1012) in sequence and extends outward. To the outside of the outer lock housing (101), the outer lock seat (1071) includes a connecting part (10715) and a cylindrical part (10716). The cylindrical part (10716) is inserted into the bearing (1074). A torsion spring (1073) is sleeved on the cylindrical part (10716). A stop block (10717) is provided on the side wall of the outer lock seat (1071). The protruding end of the torsion spring (1073) abuts against the stop block (10717). A torsion spring (1073) is located between the outer lock seat (1071) and the sealing plate (1072). A limiting protrusion (1015) is provided in the first mounting groove (1013). The limiting protrusion (1015) is an arc-shaped block. The connecting part (10715) has a square structure. A square hole is provided in the outer lock handle (103) to cooperate with the connecting part (10715). A turning hole (10711) is provided in the outer lock seat (1071). A clutch lock head (1077) is rotatably installed inside the turning hole (10711). The clutch lock head (1077) is connected to the door lock tongue. The side wall of the outer lock seat (1071) is provided with multiple threaded connection holes (10713). The side wall of the outer lock seat (1071) is provided with a baffle (1075). The baffle (1075) is locked and fixed on the outer lock seat (1071) by multiple screws screwed into the threaded connection holes (10713).

4. A smart door lock according to claim 3, characterized in that: The baffle (1075) has a through hole (10751) at its center for the clutch lock head (1077) to pass through. An arc-shaped block (10752) is disposed within the through hole (10751). The clutch lock head (1077) includes a connector (10771) and a rotating head (10772). The connector (10771) extends through the through hole (10751) to the outside of the baffle (1075), and the rotating head (10772) is located inside the baffle (1075). A limit block (10775) is disposed on the outer circumference of the connector (10771) of the clutch lock head (10777). The limit block (10775) cooperates with the arc-shaped block (10752) for limiting movement. A connecting hole (10773) is disposed within the connector (10771). The connecting hole (10773) is a square hole. The rotating head (10772) has a slot (10774) on its outer circumference, which is connected to the connecting hole (10773). The outer lock seat (1071) has a pressure block (1076) on its side wall. The outer lock seat (1071) has countersunk holes (10712) at the positions directly opposite each other. The countersunk holes (10712) are connected to the turning hole (10711), and the connection between the two forms a through groove (10714). The countersunk holes (10712) have a mounting post (1078) inside, and a slide rod (1079) is inserted into the mounting post (1078). The slide rod (1079) has a stepped shaft structure. A clutch spring is sleeved on the slide rod (1079), and the slide rod (1079) is directly opposite the slot (10774) of the clutch lock head (1077).

5. A smart door lock according to claim 1, characterized in that: The inner lock housing (201) is located on the inside of the door. A second groove (2011) is provided on the side wall of the inner lock housing (201). A second insertion hole (2012) is provided at the bottom of the second groove (2011). A second placement groove (2014) is provided at the upper position of the bottom of the second groove (2011). A frame (205) is provided in the second placement groove (2014). Multiple slots (2015) are provided at the bottom edge of the second groove (2011). An inner lock panel (202) is inserted into the second groove (2011). The inner lock panel (202) has a locking hole (2021) in the middle, and the protrusion in the middle of the inner lock housing (201) is engaged in the locking hole (2021). The inner lock panel (202) has a rotating hole (2023) at the lower position, and the rotating hole (2023) is opened opposite the second insertion hole (2012). The inner lock panel (202) has multiple wedges (2022) on its side wall, and the multiple wedges (2022) are respectively inserted into multiple slots (2015). The inner lock housing (201) has a cover (210) on its side wall.

6. A smart door lock according to claim 5, characterized in that: The second groove (2011) has a protrusion in the middle and a third insertion hole (2013) in the middle. Both the second insertion hole (2012) and the third insertion hole (2013) are connected to the second mounting groove (2016). The inner lock mechanism (207) is rotatably disposed in the second mounting groove (2016), and the inner lock seat of the inner lock mechanism (207) is inserted into the third insertion hole (2013).

7. A smart door lock according to claim 1, characterized in that: The mechanical lock (105) has an operation hole (1051) at the bottom, and a push rod (1052) is movably arranged inside the mechanical lock (105), which is located below the clutch mechanism (106).

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