Smart door lock

Abstract

This application discloses a smart door lock, relating to the field of security lock design technology. The smart door lock includes a front panel, a rear panel, and a transmission rod. The front and rear panels are respectively mounted on opposite sides of the door panel. The transmission rod connects the front and rear panels. The rear panel includes a housing, an inner handle, a handle connector, and a clutch sleeve. The handle connector and clutch sleeve are both disposed within the housing cavity. The handle connector has a retractable positioning element, and the clutch sleeve has a positioning groove. A child lock on the rear panel can drive the positioning element to move, allowing the positioning element to engage or disengage with the positioning groove. The inner handle is rotatably disposed outside the housing and is connected to the handle connector. The transmission rod is connected to the clutch sleeve. When the child lock is in the open state, the positioning element disengages from the positioning groove. Pressing down the outer handle of the front panel can drive the transmission rod to rotate, thus opening the smart door lock. This solution addresses the problem of poor usability of current smart door locks.

Description

Technical Field

[0001] This application belongs to the field of security lock design technology, specifically relating to an intelligent door lock. Background Technology

[0002] Smart door locks differ from traditional mechanical locks, offering improved security and convenience. They also feature intelligent linkage functions, such as supporting multiple unlocking methods including fingerprint, password, mobile app, and facial recognition, solving the problem of forgetting or losing keys. The automatic locking function ensures that you don't need to worry about the door lock status after leaving home, and abnormal unlocking (such as forced removal or multiple incorrect password attempts) will trigger an alarm and push a notification to your mobile phone.

[0003] Existing smart door locks, when the child lock is engaged, can prevent children from accidentally opening the lock from inside, thus preventing safety hazards. However, when the child lock is engaged, the door cannot be unlocked from the outside; the child lock must be disengaged before unlocking can be completed, making the use of smart door locks somewhat inconvenient. Utility Model Content

[0004] The purpose of this application is to provide a smart door lock that can solve the problem of poor ease of use of current smart door locks.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application provides a smart door lock, including a front panel, a rear panel, and a transmission rod. The front panel and the rear panel are respectively mounted on opposite sides of a door panel. A first end of the transmission rod is connected to the front panel, and a second end of the transmission rod is connected to the rear panel.

[0007] The rear panel includes a housing, an inner handle, a handle connector, and a clutch sleeve. Both the handle connector and the clutch sleeve are disposed within the receiving cavity of the housing. The handle connector has a retractable positioning element, and the clutch sleeve has a positioning groove. A child lock on the rear panel can drive the positioning element to move, allowing it to engage or disengage with the positioning groove. The inner handle is rotatably disposed outside the housing and is connected to the handle connector. The transmission rod is connected to the clutch sleeve.

[0008] When the child lock is in the open state, the positioning member disengages from the positioning groove, and pressing down the outer handle of the front panel can drive the transmission rod to rotate, so that the smart door lock is in the open state.

[0009] In this embodiment, when the child lock is in the closed state, the positioning element on the handle connector of the rear panel engages with the positioning groove of the clutch sleeve, allowing both the outer handle of the front panel and the inner handle of the rear panel to drive the transmission rod to rotate, thus opening the smart lock. When the child lock is in the open state, the positioning element on the handle connector of the rear panel disengages from the positioning groove of the clutch sleeve, allowing the outer handle of the front panel to be pressed down to drive the transmission rod to rotate, thus opening the smart lock. In other words, regardless of whether the child lock is open or closed, the handle on the front panel (i.e., the outer handle) is not locked, and can drive the transmission rod to rotate, thus opening the smart lock without first disengaging the child lock. This improves the ease of use of the smart lock. Attached Figure Description

[0010] Figure 1 This is an exploded view of the front door panel of the smart door lock disclosed in an embodiment of this application;

[0011] Figure 2 This is a schematic diagram of the front door panel of the smart door lock disclosed in an embodiment of this application;

[0012] Figures 3 to 4 These are schematic diagrams of the handle connector disclosed in the embodiments of this application from different perspectives;

[0013] Figures 5 to 6 These are schematic diagrams of the clutch sleeve disclosed in the embodiments of this application from different perspectives;

[0014] Figure 7 This is a schematic diagram of the structure of the return sleeve disclosed in the embodiments of this application;

[0015] Figures 8 to 9 These are partial cross-sectional views of the front door panel of the smart door lock disclosed in the embodiments of this application from different perspectives;

[0016] Figure 10 This is a partial structural diagram of the front door panel of the smart door lock disclosed in an embodiment of this application;

[0017] Figures 11 to 12 This is a schematic diagram showing the front door panel of the smart door lock disclosed in this application in different states.

[0018] Explanation of reference numerals in the attached figures:

[0019] 100 - Rear panel, 110 - Outer shell, 111 - Housing, 112 - Base plate, 112a - Clearance opening, 113 - First abutment protrusion, 114 - Second abutment protrusion, 115 - Second limiting protrusion, 116 - Third limiting protrusion, 120 - Inner handle, 130 - Handle connector, 131 - Positioning groove, 131a - First surface, 131b - Second surface, 132 - First limiting protrusion, 140 - Clutch sleeve 141-Positioning groove, 141'-First positioning groove, 141”-Second positioning groove, 142-Positioning protrusion, 143-First annular part, 144-Annular mounting plate, 145-Second annular part, 150-Positioning component, 160-Child lock, 161-Toggle, 170-Elastic drive component, 180-Return sleeve, 181-Limiting notch, 182-Annular connecting plate, 183-Annular limiting part, 190-Fastener;

[0020] 200-Transmission rod. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0023] The smart door lock provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0024] like Figures 1 to 12As shown in the illustration, this application discloses an intelligent door lock, which includes a front panel, a rear panel 100, and a transmission rod 200. Optionally, the transmission rod 200 can be a square bar. The front panel and rear panel 100 are respectively installed on opposite sides of the door panel. The first end of the transmission rod 200 is connected to the front panel, and the second end of the transmission rod 200 is connected to the rear panel 100, that is, the transmission rod 200 connects the front panel and the rear panel 100. Optionally, the intelligent door lock also includes a lock body and a lock cylinder. The lock body is disposed inside the door panel, and the lock cylinder is disposed in the lock body. The lock cylinder is connected to the transmission rod 200 through a transmission mechanism. When the transmission rod 200 rotates, the transmission rod 200 drives the lock cylinder to move through the transmission mechanism to unlock the door.

[0025] The rear panel 100 includes a housing 110, an inner handle 120, a handle connector 130, and a clutch sleeve 140. The handle connector 130 and the clutch sleeve 140 are both disposed in the receiving cavity of the housing 110. The handle connector 130 is provided with a retractable positioning member 150. Optionally, an elastic member is provided between the positioning member 150 and the handle connector 130 so that the positioning member 150 can extend or retract relative to the handle connector 130. The clutch sleeve 140 is provided with a positioning groove 141. The child lock 160 of the rear panel 100 can drive the positioning member 150 to move, so that the positioning member 150 is engaged or disengaged from the positioning groove 141. Optionally, the child lock 160 is movably disposed in the receiving cavity of the housing 110. The child lock 160 is provided with a lever 161. One end of the lever 161 extends through the housing 110 to the outside of the housing 110, so as to facilitate manual operation by the user. Specifically, the user can manually push the lever 161 to move the child lock 160 upward, so as to drive the positioning member 150 to move to engage with the positioning groove 141 of the clutch sleeve 140. At this time, the elastic member is deformed. Conversely, the user can manually push the lever 161 to move the child lock 160 downward. At this time, the positioning member 150 is disengaged from the positioning groove 141 of the clutch sleeve 140 under the action of the elastic member.

[0026] The inner handle 120 is rotatably mounted outside the outer casing 110 and is connected to the handle connector 130. Optionally, the connecting portion of the inner handle 120 extends rotatably into the mounting hole of the outer casing 110 and connects to the handle connector 130. When the user lifts or presses down the inner handle 120 (lifting the handle specifically means driving the inner handle 120 to rotate counterclockwise relative to the door, and pressing down the handle specifically means driving the inner handle 120 to rotate clockwise relative to the door), the inner handle 120 drives the handle connector 130 to rotate together. The transmission rod 200 is connected to the clutch sleeve 140. When the child lock 160 is in the open state, the positioning member 150 disengages from the positioning groove 141, and pressing down the outer handle of the front panel can drive the transmission rod 200 to rotate, so that the smart door lock is in the open state.

[0027] In this embodiment, when the child lock 160 is in the closed state, the positioning member 150 on the handle connector 130 of the rear panel 100 is positioned and engaged with the positioning groove 141 of the clutch sleeve 140. Both the outer handle of the front panel and the inner handle 120 of the rear panel 100 can drive the transmission rod 200 to rotate, thereby opening the smart lock. When the child lock 160 is in the open state, the positioning member 150 on the handle connector 130 of the rear panel 100 is disengaged from the positioning groove 141 of the clutch sleeve 140. Pressing down the outer handle of the front panel can drive the transmission rod 200 to rotate, thus opening the smart lock. In other words, regardless of whether the child lock is open or closed, the outer handle of the front panel is not locked. Pressing down the outer handle of the front panel can drive the transmission rod 200 to rotate, thus opening the smart lock without first disengaging the child lock. This improves the ease of use of the smart lock. Therefore, this application solves the problem of poor ease of use of current smart locks.

[0028] Optionally, the structure of the front panel is similar to that of the rear panel 100. The front panel includes a housing, an outer handle, a handle connector, and a clutch sleeve. Both the handle connector and the clutch sleeve are housed within the housing's receiving cavity. The handle connector has a retractable positioning element. Unlike the rear panel 100, the positioning element of the front panel is controlled by an electrically driven structure. For example, when the user enters a password, the control unit receives the signal and controls the electrically driven structure to move the positioning element, thereby positioning or disengaging it from the positioning groove 141. Of course, the front panel also includes multiple input methods for unlocking information, such as fingerprint recognition and facial recognition.

[0029] In an optional embodiment, the rear panel 100 further includes an elastic drive member 170, which is a torsion spring. The elastic drive member 170 is sleeved on the handle joint 130. The first end and the second end of the elastic drive member 170 can both abut against the inner wall of the housing 110. The inner handle 120 can drive one of the first end and the second end of the elastic drive member 170 to rotate circumferentially along the clutch sleeve 140 through the handle joint 130, so that the elastic drive member 170 deforms. Optionally, the first end and the second end of the elastic drive member 170 are both positioned and engaged with the positioning structure provided on the outer peripheral surface of the handle joint 130. The elastic drive member 170 can drive the clutch sleeve 140, the handle joint 130 and the inner handle 120 to rotate and reset together.

[0030] When the inner handle 120 is pressed down, the inner handle 120 drives one of the first and second ends of the elastic drive member 170 to rotate circumferentially along the clutch sleeve 140 through the handle joint 130, while the other end abuts against the inner wall of the housing 110, causing the elastic drive member 170 to deform. When the clutch sleeve 140 is positioned and engaged with the handle joint 130, the clutch sleeve 140 and the handle joint 130 rotate together. When the downward pressure applied to the inner handle 120 is removed, the elastic drive member 170 can drive the handle joint 130 and the inner handle 120 to rotate and reset together. When the clutch sleeve 140 is positioned and engaged with the handle joint 130, the elastic drive member 170 can drive the clutch sleeve 140, the handle joint 130 and the inner handle 120 to rotate and reset together.

[0031] When the inner handle 120 is lifted, the inner handle 120 drives one of the first and second ends of the elastic drive member 170 to rotate circumferentially along the clutch sleeve 140 via the handle joint 130, while the other end abuts against the inner wall of the housing 110, causing the elastic drive member 170 to deform. It should be noted that the end of the elastic drive member 170 that rotates circumferentially along the clutch sleeve 140 is the opposite of the end that abuts against the inner wall of the housing 110 when the inner handle 120 is pressed down. When the lifting force acting on the inner handle 120 is removed, the elastic drive member 170 can drive the clutch sleeve 140, handle joint 130, and inner handle 120 to rotate and reset together. In this design, the elastic drive member 170 is a torsion spring, which has a simple structure and low manufacturing cost. Of course, the elastic drive member 170 can also be replaced with a gas spring with a ball bearing, but the manufacturing cost of this structure is not as low as that of a torsion spring.

[0032] In an optional embodiment, the handle connector 130 is a sleeve structure, and the handle connector 130 is partially sleeved with the clutch sleeve 140, that is, a portion of the handle connector 130 is sleeved on the outer side of a portion of the clutch sleeve 140. The inner circumferential surface of the handle connector 130 is provided with a positioning groove 131, which extends to the side of the handle connector 130 opposite to the inner handle 120. The positioning groove 131 and the positioning element 150 are arranged at intervals in the circumferential direction of the handle connector 130. The outer circumferential surface of the clutch sleeve 140 is provided with a positioning protrusion 142, which is arranged at intervals in the circumferential direction of the clutch sleeve 140. The arc length of the positioning protrusion 142 is smaller than the arc length of the positioning groove 131. The positioning protrusion 142 and the positioning groove 131 are positioned and engaged in the circumferential direction of the clutch sleeve 140. That is, the positioning protrusion 142 and the positioning groove 131 are positioned and engaged on one side in the circumferential direction of the clutch sleeve 140. When the inner handle 120 is lifted, the clutch sleeve 140 and the transmission rod 200 are driven to rotate together through the handle connector 130, so that the smart door lock is in the deadbolt state.

[0033] In the above scheme, since the handle connector 130 and the clutch sleeve 140 are in a single-sided positioning engagement, when the child lock 160 is in the open state and the positioning element 150 is disengaged from the positioning groove 141, the positioning element 150 is separated from the child lock. Lifting the inner handle 120 (or the outer handle) will cause the clutch sleeve 140 to rotate in the opposite direction (i.e., counterclockwise) through the handle connector 130, thereby completing the anti-locking function. When the child lock 160 is in the closed state and the positioning element 150 is in a positioning engagement with the positioning groove 141, lifting the inner handle 120 (or the outer handle) will cause the clutch sleeve 140 to rotate in the opposite direction (i.e., counterclockwise) through the handle connector 130. At this time, the positioning element 150 will rub against the child lock 160, thereby completing the anti-locking function. In other words, regardless of whether the child lock 160 is in the open or closed state, lifting the inner handle 120 (or the outer handle) will cause the clutch sleeve 140 to rotate in the opposite direction (i.e., counterclockwise) via the handle connector 130, thereby completing the anti-locking function. Furthermore, when the lifting force applied to the inner handle 120 is removed, the elastic drive member 170 can drive the handle connector 130 and the inner handle 120 to rotate and reset together. Of course, the aforementioned positioning groove 131 and positioning protrusion 142 may also be omitted. In this case, anti-locking can only be performed when the child lock 160 is in the closed state and the positioning member 150 is positioned and engaged with the positioning groove 141; or when the child lock 160 is in the open state, anti-locking can be performed by lifting the handle using a transmission member or a limiting member.

[0034] Based on the above, when the child lock 160 is in the open state and the upward force acting on the inner handle 120 is removed, the elastic drive member 170 can drive the handle joint 130 and the inner handle 120 to rotate and reset together. However, since the handle joint 130 and the clutch sleeve 140 are in a one-sided positioning fit, the clutch sleeve 140 cannot reset, and correspondingly, it is impossible to unlock through the inner handle 120 (or the outer handle). Therefore, in a further optional embodiment, the smart door lock also includes a return sleeve 180, which is sleeved outside the clutch sleeve 140. The return sleeve 180 is provided with a limiting notch 181. In the circumferential direction of the clutch sleeve 140, the first end and the second end of the elastic drive member 170 are both located within the limiting notch 181, and the first end and the second end of the elastic drive member 170 are respectively limited and engaged with the two side walls opposite to the limiting notch 181. When the smart door lock is in the deadbolt state and the child lock 160 is in the open state, the elastic drive member 170 can drive the handle connector 130, the inner handle 120, the clutch sleeve 140 and the return sleeve 180 to rotate and reset together.

[0035] The above solution establishes a cooperative relationship between the clutch sleeve 140 and the elastic drive element 170 by setting a return sleeve 180. When the smart door lock is in the deadbolt state and the child lock 160 is in the open state, the elastic drive element 170 can drive the handle connector 130 and the inner handle 120 to rotate and reset together. At the same time, the elastic drive element 170 drives the clutch sleeve 140 to rotate and reset through the return sleeve 180, thus facilitating unlocking after pressing down the inner handle 120 (or the outer handle). That is, multiple structures can be reset by the same elastic drive element 170, which has the effect of multiple uses and improves the utilization rate of the elastic drive element 170. Of course, an additional drive element can also be set to drive the clutch sleeve 140 to reset.

[0036] Optionally, the return sleeve 180 can be an annular structure with a constant diameter in its axial direction; or, in other optional embodiments, the return sleeve 180 includes a connected annular connecting plate 182 and an annular limiting portion 183. The annular connecting plate 182 is sleeved on the clutch sleeve 140, and the annular connecting plate 182 and the clutch sleeve 140 are detachably connected. Optionally, the annular connecting plate 182 and the clutch sleeve 140 can be detachably connected by screws or other connecting parts. The annular limiting portion 183 is an open ring structure, and a limiting notch 181 is provided at one end of the annular limiting portion 183 opposite to the annular connecting plate 182. The positioning member 150 is located between the two opposite ends of the annular limiting portion 183 in its circumferential direction. This solution improves the stability and firmness of the connection between the return sleeve 180 and the clutch sleeve 140 by setting the return sleeve 180 as the aforementioned cylindrical structure and sleeved the annular connecting plate 182 onto the clutch sleeve 140. In addition, the annular limiting part 183 is set as an open ring structure to avoid the positioning member 150 and other structures, thereby facilitating the setting of this part of the structure.

[0037] In another optional embodiment, the clutch sleeve 140 includes a first annular portion 143, an annular mounting plate 144, and a second annular portion 145 connected in sequence. The first annular portion 143 is sleeved on the transmission rod 200, and the first annular portion 143 and the transmission rod 200 are positioned and engaged in the circumferential direction of the clutch sleeve 140 to make the clutch sleeve 140 more stable when rotating together with the transmission rod 200. The return sleeve 180 is sleeved on the first annular portion 143, and the annular connecting plate 182 of the return sleeve 180 and the annular mounting plate 144 of the clutch sleeve 140 are stacked in the axial direction of the clutch sleeve 140, and the two are detachably connected. The annular mounting plate 144 and the second annular portion 145 are both located within the receiving space of the return sleeve 180. When the annular connecting plate 182 of the return sleeve 180 and the annular mounting plate 144 of the clutch sleeve 140 are stacked in the axial direction of the clutch sleeve 140, the contact area between the two is large, which helps to improve the connection stability and firmness between the return sleeve 180 and the clutch sleeve 140; and when the contact area between the annular connecting plate 182 and the annular mounting plate 144 is large, it is convenient to set the connection hole.

[0038] In another optional embodiment, the outer peripheral surface of the handle connector 130 is provided with a first limiting protrusion 132, the first limiting protrusion 132 and the positioning groove 131 are arranged at intervals in the circumferential direction of the handle connector 130, the positioning member 150 is located at the first limiting protrusion 132, and the outer shell 110 is provided with a second limiting protrusion 115 and a third limiting protrusion 116 on opposite side walls in its width direction. Optionally, the second limiting protrusion 115 and the third limiting protrusion 116 are both located on the same side of the central axis of the clutch sleeve 140, and the inner handle 12 Pressing down causes the handle connector 130 to rotate relative to the housing 110 (i.e., clockwise rotation), so that the first limiting protrusion 132 and the second limiting protrusion 115 are in a circumferential upper limit engagement with the handle connector 130, thereby preventing the handle connector 130 from continuing to rotate; lifting the inner handle 120 causes the handle connector 130 to rotate relative to the housing 110 (i.e., counterclockwise rotation), so that the first limiting protrusion 132 and the third limiting protrusion 116 are in a circumferential upper limit engagement with the handle connector 130, thereby preventing the handle connector 130 from continuing to rotate. This solution, by providing the first limiting protrusion 132 on the outer circumferential surface of the handle connector 130, avoids the handle connector 130 from rotating too much relative to the housing 110; in addition, the provision of the first limiting protrusion 132 not only extends the mounting hole on the handle connector 130 for mounting the positioning member 150, thereby facilitating the installation of the positioning member 150, but also increases the structural strength of the handle connector 130.

[0039] Optionally, the arc length of the positioning groove 131 may be less than 180°; or the arc length of the positioning groove 131 may be greater than 180°, which can ensure that the handle joint 130 has a large range of rotation.

[0040] In an optional embodiment, the inner handle 120 is detachably connected to the handle connector 130. The clutch sleeve 140 has a central axis symmetric structure, and there are two positioning grooves 141, including a first positioning groove 141' and a second positioning groove 141" which are arranged opposite to each other. The positioning protrusion 142 is located between the first positioning groove 141' and the second positioning groove 141", and the arc length between the positioning protrusion 142 and the first positioning groove 141' is equal to the arc length between the positioning protrusion 142 and the second positioning groove 141". The positioning member 150 can be positioned and engaged or disengaged from either the first positioning groove 141' or the second positioning groove 141". In practical applications, since door panels are divided into left-opening and right-opening doors, this solution sets the clutch sleeve 140 to a central axis symmetric structure. When it is necessary to adapt to different types of door panels, the inner handle 120 and the handle connector 130 can be disassembled, and the inner handle 120 and the clutch sleeve 140 can be rotated 180° to change direction, thereby expanding the applicability of the smart door lock. It should be noted that during the above-mentioned smart door lock reversal process, the handle connector 130 and the elastic drive component 170 do not need to be rotated.

[0041] Optionally, the positioning groove 131 has a first surface 131a and a second surface 131b facing each other in the circumferential direction of the handle joint 130. When the door panel is a left-opening door, the positioning protrusion 142 and the first surface 131a of the positioning groove 131 are positioned and engaged in the circumferential direction of the clutch sleeve 140. When the inner handle 120 is lifted, the clutch sleeve 140 and the transmission rod 200 are driven to rotate together through the handle joint 130, so that the smart door lock is in the reverse-locked state. When the door panel is a right-opening door, the positioning protrusion 142 and the second surface 131b of the positioning groove 131 are positioned and engaged in the circumferential direction of the clutch sleeve 140. When the inner handle 120 is lifted, the clutch sleeve 140 and the transmission rod 200 are driven to rotate together through the handle joint 130, so that the smart door lock is in the reverse-locked state.

[0042] Optionally, in an embodiment where the smart lock also includes a return sleeve 180, the clutch sleeve 140 has a central axis symmetric structure, and the return sleeve 180 also has a central axis symmetric structure. When reversing is required, the return sleeve 180 and the clutch sleeve 140 need to be separated, and the return sleeve 180 is rotated 180° to realize the reversing function of the smart lock.

[0043] Optionally, the positioning protrusion 142 may be a continuous structure in its circumferential direction, or the positioning protrusion 142 may be provided with a recess in its circumferential direction, the recess being provided in the middle part of the positioning protrusion 142 in its circumferential direction, so that the positioning protrusion 142 is a symmetrical structure.

[0044] Alternatively, the inner handle 120 and the handle connector 130 can be detachably connected by fasteners 190 such as screws.

[0045] In another optional embodiment, the outer casing 110 has a first abutting protrusion 113 and a second abutting protrusion 114 on its opposite side walls in the width direction. The first abutting protrusion 113 and the second abutting protrusion 114 are both located on the same side of the central axis of the clutch sleeve 140 (the first abutting protrusion 113 and the second abutting protrusion 114 are located on the first side of the central axis of the clutch sleeve 140, and the second limiting protrusion 115 and the third limiting protrusion 116 are located on the second side of the central axis of the clutch sleeve 140, the first side and the second side are opposite sides of the central axis of the clutch sleeve 140). The first abutting protrusion 113 has a first abutting slope, and the periphery of the first end of the elastic drive member 170... The first abutting protrusion 113 abuts against the second abutting protrusion 114, and the second end of the elastic drive member 170 abuts against the second abutting protrusion 114. The elastic drive member 170 abuts against the first abutting protrusion 113 and the second abutting protrusion 114 through line contact, resulting in a large contact area. This disperses the force exerted by the elastic drive member 170 on the outer casing 110, preventing excessive force concentration and protecting the outer casing 110. Furthermore, by providing the first abutting protrusion 113 and the second abutting protrusion 114 on the two side walls of the outer casing 110, it is easier to establish an abutting relationship between the elastic drive member 170 and the outer casing 110. Alternatively, the first abutting protrusion 113 and the second abutting protrusion 114 can be omitted, in which case the first and second ends of the elastic drive member 170 can make point contact with the two side walls of the outer casing 110 in its width direction.

[0046] In one optional embodiment, the outer casing 110 includes a detachably connected housing 111 and a base plate 112, which together form the aforementioned receiving cavity. The base plate 112 has a clearance opening 112a, through which the first annular portion 143 of the clutch sleeve 140 extends beyond the outer casing 110. The first annular portion 143 is sleeved on the transmission rod 200, which increases the contact area between the clutch sleeve 140 and the transmission rod 200, thereby improving the stability of their engagement and reducing the space occupied by the clutch sleeve 140 within the receiving cavity. Furthermore, the clearance opening 112a is located on the base plate 112, facilitating the assembly of structures such as the clutch sleeve 140. Alternatively, the first annular portion 143 of the clutch sleeve 140 may be located within both the clearance opening 112a and the receiving cavity, or it may be located only within the clearance opening 112a.

[0047] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A smart door lock, characterized in that, The device includes a front panel, a rear panel (100), and a transmission rod (200). The front panel and the rear panel (100) are respectively installed on opposite sides of the door panel. The first end of the transmission rod (200) is connected to the front panel, and the second end of the transmission rod (200) is connected to the rear panel (100). The rear panel (100) includes a housing (110), an inner handle (120), a handle connector (130), and a clutch sleeve (140). Both the handle connector (130) and the clutch sleeve (140) are located within the receiving cavity of the housing (110). The handle connector (130) has a retractable positioning element (150), and the clutch sleeve (140) has a positioning groove (141). The child lock (160) of the rear panel (100) can drive the positioning element (150) to move, so that the positioning element (150) is engaged or disengaged from the positioning groove (141). The inner handle (120) is rotatably disposed outside the housing (110) and is connected to the handle connector (130). The transmission rod (200) is connected to the clutch sleeve (140). When the child lock (160) is in the open state, the positioning member (150) is disengaged from the positioning groove (141), and the outer handle of the front panel can be pressed down to drive the transmission rod (200) to rotate, so that the smart door lock is in the open state.

2. The smart door lock according to claim 1, characterized in that, The rear panel (100) also includes an elastic drive member (170), which is a torsion spring. The elastic drive member (170) is sleeved on the handle joint (130). The first end and the second end of the elastic drive member (170) can both abut against the inner wall of the outer shell (110). The inner handle (120) can drive one of the first end and the second end of the elastic drive member (170) to rotate around the clutch sleeve (140) through the handle joint (130) so that the elastic drive member (170) deforms. The elastic drive member (170) can drive the clutch sleeve (140), the handle joint (130) and the inner handle (120) to rotate and reset together.

3. The smart door lock according to claim 2, characterized in that, The handle connector (130) is a sleeve structure, and the handle connector (130) is partially sleeved with the clutch sleeve (140). The handle connector (130) has a positioning groove (131) on its inner circumferential surface. The positioning groove (131) extends to the side of the handle connector (130) facing away from the inner handle (120). The positioning groove (131) and the positioning element (150) are spaced apart in the circumferential direction of the handle connector (130). The clutch sleeve (140) has a positioning protrusion (142) on its outer circumferential surface. The positioning protrusion (142) and the positioning groove (141) are located at... The clutch sleeves (140) are arranged at intervals in the circumferential direction. The arc length of the positioning protrusion (142) is smaller than the arc length of the positioning groove (131). The positioning protrusion (142) and the positioning groove (131) are positioned and engaged in the circumferential direction of the clutch sleeves (140). When the inner handle (120) is lifted, the clutch sleeves (140) and the transmission rod (200) are driven to rotate together through the handle joint (130) so that the smart door lock is in the deadbolt state.

4. The smart door lock according to claim 3, characterized in that, The smart door lock also includes a return sleeve (180), which is sleeved outside the clutch sleeve (140). The return sleeve (180) is provided with a limiting notch (181). In the circumferential direction of the clutch sleeve (140), the first end and the second end of the elastic drive member (170) are both located within the limiting notch (181), and the first end and the second end of the elastic drive member (170) are respectively limited and engaged with the two side walls opposite to the limiting notch (181). When the smart door lock is in the deadbolt state and the child lock (160) is in the open state, the elastic drive member (170) can drive the handle connector (130), the inner handle (120), the clutch sleeve (140) and the return sleeve (180) to rotate and reset together.

5. The smart door lock according to claim 4, characterized in that, The return sleeve (180) includes a connected annular connecting plate (182) and an annular limiting part (183). The annular connecting plate (182) is sleeved on the clutch sleeve (140). The annular connecting plate (182) and the clutch sleeve (140) are detachably connected. The annular limiting part (183) has an open ring structure. The limiting notch (181) is provided at one end of the annular limiting part (183) away from the annular connecting plate (182). The positioning member (150) is located between the two opposite ends of the annular limiting part (183) in its circumferential direction.

6. The smart door lock according to claim 4, characterized in that, The clutch sleeve (140) includes a first annular portion (143), an annular mounting plate (144), and a second annular portion (145) connected in sequence. The first annular portion (143) is sleeved on the transmission rod (200), and the first annular portion (143) and the transmission rod (200) are positioned and engaged in the circumferential direction of the clutch sleeve (140). The return sleeve (180) is sleeved on the first annular portion (143), and the annular connecting plate (182) of the return sleeve (180) and the annular mounting plate (144) are stacked on the axial direction of the clutch sleeve (140), and the two are detachably connected. The annular mounting plate (144) and the second annular portion (145) are both located within the accommodating space of the return sleeve (180).

7. The smart door lock according to claim 3, characterized in that, The outer peripheral surface of the handle connector (130) is provided with a first limiting protrusion (132). The first limiting protrusion (132) and the positioning groove (131) are arranged at intervals in the circumferential direction of the handle connector (130). The arc length of the positioning groove (131) is greater than 180°. The positioning member (150) is located at the first limiting protrusion (132). The outer shell (110) has a second limiting protrusion (115) and a third limiting protrusion (116) respectively on its opposite side walls in the width direction. Pressing down the inner handle (120) can cause the handle joint (130) to rotate relative to the outer shell (110), so that the first limiting protrusion (132) and the second limiting protrusion (115) are in a circumferential upper limit engagement with the handle joint (130); lifting the inner handle (120) can cause the handle joint (130) to rotate relative to the outer shell (110), so that the first limiting protrusion (132) and the third limiting protrusion (116) are in a circumferential upper limit engagement with the handle joint (130).

8. The smart door lock according to claim 3, characterized in that, The inner handle (120) is detachably connected to the handle connector (130). The clutch sleeve (140) has a central axis symmetrical structure. There are two positioning grooves (141), including a first positioning groove (141') and a second positioning groove (141") arranged opposite to each other. The positioning protrusion (142) is located between the first positioning groove (141') and the second positioning groove (141"), and the arc length between the positioning protrusion (142) and the first positioning groove (141') is equal to the arc length between the positioning protrusion (142) and the second positioning groove (141"). The positioning member (150) can be positioned and engaged or disengaged from either the first positioning groove (141') or the second positioning groove (141").

9. The smart door lock according to claim 2, characterized in that, The outer casing (110) has a first abutting protrusion (113) and a second abutting protrusion (114) on its opposite side walls in the width direction. The first abutting protrusion (113) and the second abutting protrusion (114) are both located on the same side of the central axis of the clutch sleeve (140). The first abutting protrusion (113) has a first abutting inclined surface. The circumferential surface of the first end of the elastic drive member (170) abuts against the first abutting inclined surface. The second abutting protrusion (114) has a second abutting inclined surface. The circumferential surface of the second end of the elastic drive member (170) abuts against the second abutting inclined surface.

10. The smart door lock according to claim 1, characterized in that, The outer casing (110) includes a detachably connected housing (111) and a base plate (112), the housing (111) and the base plate (112) forming the receiving cavity, the base plate (112) having a clearance opening (112a), the first annular portion (143) of the clutch sleeve (140) extending through the clearance opening (112a) to the outside of the outer casing (110), and the first annular portion (143) being sleeved on the transmission rod (200).

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