Smart lock and handle hiding structure thereof

Abstract

The application discloses an intelligent lock and a handle hiding structure thereof, wherein the handle is no longer a distinct protrusion on the surface of the lock body, and the handle hiding structure can hide and open the handle, thereby facilitating user use. The handle hiding structure comprises a lock body, a handle plate and a handle driving mechanism. The handle plate is movably matched on the front surface of the lock body, and one side of the handle plate is pivotally matched with the lock body to form a pivot shaft parallel to the one side of the handle plate. The handle driving mechanism is installed in the lock body and is in transmission with the handle plate, and is used for driving the handle plate to open and close around the pivot shaft, so that a handle groove formed between the other side of the handle plate and the lock body is opened and closed.

Description

Technical Field

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

[0002] Compared to traditional mechanical locks, smart locks are more intelligent in terms of user identification, security, and management, and are gradually becoming more common in homes. Common smart locks generally use electronic passwords, fingerprints, voiceprints, and iris recognition for unlocking, and are equipped with handles that protrude from the lock body surface, providing users with a gripping point between the lock and the door for easy opening and closing.

[0003] However, handles protruding from the lock body not only affect the overall aesthetics of the smart lock, but may also cause users to bump into them, snag or even damage their clothing during entry and exit. Furthermore, protruding handles are more easily damaged, thus compromising the entire smart lock and affecting its anti-theft performance. To address this, existing technologies, such as patent CN202020687428.9 which discloses "A Fingerprint Lock with a Hideable Handle," conceal the fingerprint lock's control panel and door handle with sliding covers, making it relatively discreet. However, this requires additional upper and lower sliding covers, making it somewhat cumbersome to use. Summary of the Invention

[0004] The purpose of this invention is to provide a smart lock and its handle hiding structure, which solves the problems existing in the prior art. The handle is no longer an obvious protrusion on the surface of the lock body, and the handle can be hidden and opened, making it convenient for users.

[0005] To achieve the above objectives, one solution of the present invention is:

[0006] A handle concealment structure includes a lock body, a handle plate, and a handle drive mechanism; the handle plate is movably fitted on the front of the lock body, and one side of the handle plate is pivotally fitted with the lock body to form a pivot shaft parallel to one side of the handle plate; the handle drive mechanism is installed in the lock body and drives the handle plate to open and close around the pivot shaft, so that the handle groove formed between the other side of the handle plate and the lock body can be opened and closed.

[0007] The handle concealment structure also includes an opening and closing component fixed relative to the handle plate; the opening and closing component is arranged along a direction perpendicular to the side of the handle plate and is connected to the handle drive mechanism, and one end of the opening and closing component is fixed relative to the lock body, while the other end of the opening and closing component can rotate around one end of the opening and closing component under the drive of the handle drive mechanism.

[0008] Preferably, the handle drive mechanism includes a motor electrically connected to the control part of the smart lock, a drive shaft driven by the motor, a first gear coaxially connected to the end of the drive shaft, a rack driven by the first gear, and a connecting rod at both ends pivotally engaged with the opening / closing member and the rack, respectively; the rack slides within the lock body along a direction perpendicular to the side of the handle plate, and the connecting rod converts the linear motion of the rack into the rotational motion of the other end of the opening / closing member.

[0009] Preferably, the handle drive mechanism further includes a second gear arranged parallel to and meshing with the first gear, the rack being arranged parallel to the end face of the first gear, and the first gear and the rack meshing with the second gear respectively.

[0010] Preferably, the rack has a pivot portion protruding from the middle of its side away from the first gear, the lower end of the connecting rod is pivotally engaged with the pivot portion, and the opening / closing member is movably engaged above the pivot portion.

[0011] Preferably, the opening and closing component is provided with a slot for the connecting rod to be inserted and pivotally engaged, and the side of the slot is provided with a clearance notch to allow space for the pivoting part.

[0012] Preferably, the handle drive mechanism further includes a fixed base fixed relative to the lock body, the fixed base being provided with a movable opening for the opening and closing member to move and engage; one end of the opening and closing member is pivotally engaged with one end of the movable opening; the rack and pinion are slidably engaged between the fixed base and the lock body.

[0013] Preferably, the surface of the rack facing the fixed seat is fitted with a plurality of balls, and the fixed seat is provided with ball grooves for the balls to roll and engage.

[0014] Preferably, both ends of the fixed base are provided with pin holes, which penetrate the opposite sidewalls of the movable opening; both ends of the opening / closing member are provided with limit holes, the spacing of which is the same as the spacing of the pin holes; the back of the lock body is provided with mounting grooves corresponding to the positions of the two pin holes; each pin hole has a pin that can be inserted into the movable opening and its corresponding limit hole at one end, and a first spring is sleeved on the pin to provide elastic force to disengage one end of the pin from the movable opening; the other end of the pin is provided with a limiting member that passes through the pin hole, and the limiting member cooperates with... At the other end of the pin, the pin is driven to compress the first spring to achieve insertion into the movable opening; a second spring is provided between the limiting member and the fixed seat to provide elastic force to disengage the limiting member from the end position of the pin and to make the limiting member abut against the lock body; a reversing member is detachably installed in the mounting groove opposite to the pin, the reversing member is fixed relative to the lock body and is provided with a push rod that abuts against the limiting member, so that the limiting member compresses the second spring and engages with the end position of the pin, thereby allowing the pin to be inserted into the movable opening and its corresponding limiting hole.

[0015] Preferably, the limiting member is provided with a plug portion that passes through the pin hole, the plug portion is provided with a first inclined surface, and the corresponding end of the pin is provided with a second inclined surface, the second inclined surface slidingly engaging with the first inclined surface to allow the limiting member to push the pin.

[0016] Preferably, the lock body is provided with a limiting groove for the limiting member to move and cooperate, and the limiting groove is connected to the mounting groove.

[0017] Preferably, the reversing component is provided with a limit rod, which is used to limit the movement distance of the rack.

[0018] Preferably, the handle concealment structure further includes a blocking component, which, together with the reversing component, is respectively fitted into two mounting slots of the lock body.

[0019] Preferably, when the handle drive mechanism drives the handle plate to the open state, the included angle α between the axis of the connecting rod and the axis of the rack facing the opening and closing member is an acute angle.

[0020] Preferably, the handle drive mechanism further includes a rack and pinion limiting assembly; a convex shaft protrudes from the center of the side of the rack away from the first gear; the rack and pinion limiting assembly includes a limiting base, a rocker arm, a movable plate, and a third spring; the limiting base is fixed relative to the lock body; one end of the rocker arm is pivotally connected to the limiting base, and the other end is provided with a socket for fitting onto the convex shaft; the movable plate and the third spring are both fitted onto the rocker arm, and the movable plate abuts against the convex shaft under the elastic force of the third spring.

[0021] The second solution of the present invention is:

[0022] A smart lock including any of the described handle concealment structures.

[0023] After adopting the above technical solution, the present invention has the following technical effects:

[0024] The handle plate designed in this invention serves as both a cover for the lock body, ensuring the overall integrity of the lock's appearance, and a flush surface with the lock body when closed, eliminating the appearance of a noticeable protrusion and achieving the concealment of traditional handle structures, thus eliminating safety risks such as bumps and knocks. When open, the handle plate can also be used as a handle, providing a point of leverage for the user to push and pull the door, making it convenient for the user. Attached Figure Description

[0025] Figure 1 This is a perspective view of the handle groove in a closed state according to a specific embodiment of the present invention;

[0026] Figure 2 Breakdown of specific embodiments of the present invention Figure 1 ;

[0027] Figure 3 for Figure 2 Point A in the diagram is an enlarged view of the handle drive mechanism;

[0028] Figure 4 Breakdown of specific embodiments of the present invention Figure 2 ;

[0029] Figure 5 for Figure 4 Point B in the diagram is an enlarged view of the handle drive mechanism;

[0030] Figure 6 This is a perspective view of the handle groove in the open state according to a specific embodiment of the present invention;

[0031] Figure 7 for Figure 6 A bottom view;

[0032] Figure 8 This is a schematic diagram illustrating the working principle of the handle drive mechanism according to a specific embodiment of the present invention;

[0033] Figure 9 This is a perspective view of the handle drive mechanism when the handle groove is in the open state, according to a specific embodiment of the present invention.

[0034] Figure 10 The fixed base is a three-dimensional embodiment of the present invention. Figure 1 ;

[0035] Figure 11 The fixed base is a three-dimensional embodiment of the present invention. Figure 2 ;

[0036] Figure 12 This is a perspective view of the limiting member and the pin according to a specific embodiment of the present invention;

[0037] Figure 13 This is a perspective view of the commutator and the blocking component according to a specific embodiment of the present invention;

[0038] Figure 14 This is a cross-sectional view of a specific embodiment of the present invention;

[0039] Figure 15 for Figure 14 A cross-sectional view along the CC direction;

[0040] Explanation of icon numbers:

[0041] 1-Lock body; 11-Mounting groove; 12-Limiting groove; 13-Through hole; 2-Handle plate; 21-Leaving hole; 3-Opening / closing part; 31-Slot; 32-Leaving notch; 33-Limiting hole; 4-Motor; 5-Drive shaft; 6-First gear; 7-Rack; 71-Pivot joint; 72-Protruding shaft; 8-Connecting rod; 9-Second gear; 10-Gear fixing bracket; 20-Fixing seat; 201-Movable opening; 202-Ball groove; 203-Pin hole; 30-Ball; 40-Pin Pin; 401-Second inclined surface; 50-First spring; 60-Limiting component; 601-Plug-in part; 602-First inclined surface; 70-Second spring; 80-Reversing component; 801-Push rod; 802-Limiting rod; 90-Limiting cap; 100-Sealing component; 200-Back plate; 2001-Moving hole; 300-Limiting base; 400-Swing rod; 4001-Socket; 500-Moving plate; 600-Third spring; 700-Control panel; a-Handle groove; b-Screw. Detailed Implementation

[0042] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0043] refer to Figures 1 to 15 As shown, the present invention discloses a handle concealment structure, including a lock body 1, a handle plate 2, and a handle driving mechanism;

[0044] The handle plate 2 is movably fitted on the front of the lock body 1 (i.e. the surface of the lock body 1 facing the user), which can cover most or all of the lock body 1, and one side of the handle plate 2 is pivotally fitted with the lock body 1 to form a pivot axis parallel to one side of the handle plate 2.

[0045] The handle drive mechanism is installed inside the lock body 1 and drives the handle plate 2. It is used to drive the handle plate 2 to open and close around the pivot shaft, so that the handle groove a formed between the other side of the handle plate 2 and the lock body 1 can be opened and closed. When the handle plate 2 / handle groove a is in the open state, the user can insert his / her fingers into the handle groove a and hold the handle plate 2, thereby exerting force on the door leaf to push and pull the door leaf. When the handle plate 2 / handle groove a is in the closed state, most or all of the lock body 1 is covered by the handle plate 2, which plays an anti-theft role and makes the appearance surface of the lock body 1 appear flat.

[0046] Through the above solution, the handle plate 2 designed in this invention serves as a cover for the lock body 1, ensuring the overall appearance integrity of the lock. When the handle plate 2 is in the closed state, it remains flat with the lock body 1 and is no longer a noticeable protrusion on the surface of the lock body, thus achieving the concealment of the traditional handle structure and eliminating safety risks such as bumps and knocks. When the handle plate 2 is in the open state, it can also be used as a handle for the lock, providing a point of leverage for the user to push and pull the door (or other furniture objects that need to be opened and closed), making it convenient for the user to use.

[0047] The following illustrates specific embodiments of the present invention.

[0048] The aforementioned handle plate 2 can be directly pivotally connected to the lock body 1 via a pivot joint, resulting in fewer components but requiring higher precision in the processing and assembly of these components. Therefore, this invention also includes an opening / closing component 3 fixed to the handle plate 2 via screws (b), snap-fit ​​connections, or other means. The opening / closing component 3 is positioned perpendicular to the side of the handle plate 2 and is connected to the handle drive mechanism. One end of the opening / closing component 3 is fixed to the lock body 1, while the other end rotates around this end under the drive of the handle drive mechanism, thereby opening and closing the handle plate 2. By designing the opening / closing component 3, the handle plate 2 can be indirectly pivotally connected to the lock body 1, making it less susceptible to the limitations of component processing precision and easier to assemble. Alternatively, the opening / closing component 3 can be integrally formed on the inner side of the handle plate 2, providing a protruding portion that can be connected to the handle drive mechanism.

[0049] The aforementioned handle drive mechanism includes a motor 4 electrically connected to the control part of the smart lock, a drive shaft 5 driven by the motor 4, a first gear 6 coaxially connected to the end of the drive shaft 5, a rack 7 driven by the first gear 6, and a connecting rod 8 whose two ends are pivotally engaged with the opening / closing component 3 and the rack 7, respectively; the rack 7 is slidably engaged within the lock body 1 along a direction perpendicular to the side of the handle plate 2, see [reference]. Figures 7 to 9The linear motion of the rack 7 can be converted into the rotational motion of the other end of the opening / closing member 3 via the connecting rod 8. Thus, the handle drive mechanism, in conjunction with the control unit of the smart lock, allows the control unit to automatically open the handle plate 2 by controlling the motor 4 to rotate forward after the user completes identity verification via electronic password, fingerprint, voiceprint, or iris recognition. Conversely, when the handle plate 2 is open and remains open for a period of time, or after the door is closed, the control unit can also control the motor 4 to rotate in reverse to close the handle plate, ultimately achieving automatic opening and closing of the handle plate 2. Of course, in some embodiments, if the opening / closing member 3 is not provided, one end of the connecting rod 8 can be directly pivotally connected to the handle plate 2.

[0050] In some embodiments of the handle drive mechanism described above, the output shaft of the motor 4 and the transmission shaft 5 are arranged side by side, and the two are connected by at least two or more gears (i.e., gear sets) to transmit the torque of the motor 4 to the transmission shaft 5 and drive the transmission shaft 5 to rotate.

[0051] In some embodiments of the aforementioned handle drive mechanism, the mechanism further includes a second gear 9 arranged parallel to and meshing with the first gear 6. The thickness of the second gear 9 is greater than that of the first gear 6 so that the second gear 9 can also mesh with the rack 7. That is, the rack 7 is arranged parallel to the end face of the first gear 6, and the first gear 6 and the rack 7 mesh with the second gear 9 respectively to achieve the transmission connection between the first gear 6 and the rack 7. By setting the second gear 9 or even more gears, indirect transmission between the first gear 6 and the rack 7 can be achieved, so that the rack 7 does not directly mesh with the first gear 6. Thus, the rack 7 does not need to engage with the circumferential surface of the first gear 6, but can engage with the end face of the first gear 6, thereby reducing the thickness of this part and achieving a design that reduces the thickness of the lock, meeting the design requirements of some products.

[0052] Furthermore, the aforementioned second gear 9 is installed inside the lock body 1 via a gear fixing bracket 10, thereby achieving relative fixation with the lock body 1.

[0053] Meanwhile, a pivot portion 71 protrudes from the center of the side of the rack 7 away from the first gear 6. The lower end of the connecting rod 8 is pivotally engaged with the pivot portion 71, and the opening / closing member 3 is movably engaged above the pivot portion 71. By setting the pivot portion 71, the opening / closing member 3 is engaged on the side of the rack 7 instead of directly above it. When the handle plate 2 is in the closed state, the opening / closing member 3 can be folded to the side of the rack 7 instead of the upper surface. This also reduces the thickness of the lock design, making the fit between the components more compact. In this embodiment, the opening / closing member 3 is a sheet metal part folded into a U-shape, with a slot 31 for the connecting rod 8 to be inserted and pivotally engaged. The side of the slot 31 has a clearance notch 32 to make way for the pivot portion 71.

[0054] In some embodiments of the above-described handle drive mechanism, to facilitate installation and limit the movement of accessories (especially rack 7), the handle drive mechanism further includes a fixed base 20 that is fixed to the lock body 1 by means of screw fastening, snap-fit ​​connection, etc. The fixed base 20 is provided with a movable opening 201 for the opening and closing member 3 to move and cooperate; one end of the opening and closing member 3 is pivotally connected to one end of the movable opening 201, that is, the aforementioned pivot shaft is formed between the opening and closing member 3 and the fixed base 20; the rack 7 is slidably connected between the fixed base 20 and the lock body 1 to ensure its movement stability. Of course, since the fixed base 20 is fixed to the lock body 1, provided that the process allows (to form corresponding holes, slots, cavities, etc. for installing accessories) and facilitates accessory installation, the fixed base 20 can also be integrally formed on the lock body 1; at the same time, since the opening and closing member 3 is fixed to the handle plate 2 and the fixed base 20 is fixed to the lock body 1, the final result is still the pivotal cooperation between the handle plate 2 and the lock body 1.

[0055] In some embodiments with a fixed base 20, a plurality of balls 30 are fitted onto the surface of the rack 7 facing the fixed base 20, and a ball groove 202 is provided inside the fixed base 20 for the balls 30 to roll into contact with each other. The contact between the balls 30 and the ball groove 202 reduces the friction between the rack 7 and the fixed base 20, allowing the rack 7 to slide more smoothly. It also restricts further movement of the rack 7 when the balls 30 roll to the end of the ball groove 202, thus achieving a limiting effect.

[0056] In some embodiments with a fixed base 20, both ends of the fixed base 20 are provided with pin holes 203, which penetrate the opposite sidewalls of the movable opening 201; both ends of the opening / closing member 3 are provided with limiting holes 33, the spacing of the limiting holes 33 is the same as the spacing of the pin holes 203, that is, when the opening / closing member 3 is folded into the movable opening 201, the two limiting holes 33 correspond one-to-one with the two pin holes 203; the back of the lock body 1 is provided with a mounting groove 11 corresponding to the position of the two pin holes 203; each pin hole 203 is movably fitted with a pin 40 (the pin 40 is the aforementioned pivot shaft) whose end can be inserted into the movable opening 201 and its corresponding limiting hole 33, and a first spring 50 is sleeved on the pin 40 to provide elastic force so that one end of the pin 40 The pin 40 is disengaged from the movable opening 201; a limiting member 60 is provided at the other end of the pin 40, which passes through the pin hole 203. When the limiting member 60 is engaged with the other end of the pin 40, it drives the pin 40 to compress the first spring 50 and thus insert into the movable opening 201; a second spring 70 is provided between the limiting member 60 and the fixed base 20 to provide elastic force so that the limiting member 60 disengages from the end position of the pin 40 and abuts against the lock body 1; a reversing member 80 is detachably installed in the mounting groove 11 opposite to the pin 40. The reversing member 80 is fixed relative to the lock body 1 and is provided with a push rod 801 that abuts against the limiting member 60 so that the limiting member 60 compresses the second spring 70 and engages with the end position of the pin 40, thereby allowing the pin 40 to insert into the movable opening 201 and its corresponding limiting hole 33. This enables the reversing function of the cooperation structure between the handle plate 2 and the lock body 1, making the smart lock more versatile. Users can choose to install the reversing component 80 in one of the mounting slots 11 of the lock body 1 according to actual needs. The push rod 801 of the reversing component 80 pushes the limiting component 60 to compress the second spring 70, which in turn links the pin 40 to compress the first spring 50. The pin 40 is inserted into the limiting hole 33 of the opening and closing component 3, so that the end of the opening and closing component 3 is fixed relative to the fixed seat 20.

[0057] In some embodiments with reversing function, the limiting member 60 is provided with a plug portion 601 that passes through the pin hole 203. The plug portion 601 is provided with a first inclined surface 602, and the corresponding end of the pin 40 is provided with a second inclined surface 401. The limiting member 60 pushes the pin 40 through the sliding cooperation between the second inclined surface 401 and the first inclined surface 602.

[0058] In some embodiments with a reversing function, the lock body 1 is provided with a limiting groove 12 for the limiting member 60 to move and engage, and the limiting groove 12 is connected to the mounting groove 11. If not blocked by the push rod 801, the limiting member 60 will engage in the limiting groove 12 under the elastic force of the second spring 70, so that the limiting member 60 disengages from the end position of the pin 40.

[0059] Furthermore, a through hole 13 is provided between the mounting groove 11 and the limiting groove 12 for the push rod 801 to pass through.

[0060] In some embodiments with reversing function, the end of the pin hole 203 located on the end face of the fixed seat 20 is fixedly fitted with a limit cap 90 to prevent the pin 40 from dislodging from the fixed seat 20 under the elastic force of the first spring 50, thereby playing a limiting role.

[0061] In some embodiments with reversing function, the reversing component 80 is detachably installed in the mounting groove 11 by means of screw fastening, snap-fit ​​connection or other means. Its detachable connection means that the reversing component 80 is relatively fixed to the lock body 1 so that the push rod 801 can push the limiting component 60 to compress the second spring 70. At the same time, the reversing component 80 can be easily removed when the user needs to reverse.

[0062] In some embodiments with reversing function, the reversing member 80 is provided with a limit rod 802, which can be used to limit the movement distance of the rack 7. Therefore, the length of the reversing member 80 needs to ensure that the limit rod 802 is on the movement trajectory of the rack 7.

[0063] In some embodiments with reversing function, a blocking member 100 is also included. The blocking member 100 and the reversing member 80 are respectively fitted in two mounting slots 11 of the lock body 1. The blocking member 100 covers the mounting slots 11 to prevent foreign objects from entering the lock body 1.

[0064] Furthermore, a back plate 200 is provided on the back of the lock body 1, and the back plate 200 is provided with movable holes 2001 for the reversing component 80 and the sealing component 100 to pass through. The back plate 200 can cover the accessories installed in the lock body 1 without affecting the disassembly and assembly of the reversing component 80 and the sealing component 100.

[0065] In some embodiments of the above-mentioned handle drive mechanism, in order to make the opening and closing of the handle plate 2 more stable, both ends of the above-mentioned transmission shaft 5 are provided with opening and closing parts 3, first gear 6, rack 7 and connecting rod 8 and other accessories, which are driven by the same motor 4, so that the power of the motor 4 can act on both ends of the handle plate 2 at the same time so that the two ends of the handle plate 2 can achieve synchronous opening and closing.

[0066] See Figure 8 In some embodiments of the above-mentioned handle drive mechanism, when the handle drive mechanism drives the handle plate 2 to the open state, the included angle α between the axis of the connecting rod 8 and the axis of the rack 7 facing the opening and closing member 3 is an acute angle. The effect achieved is that when the handle plate 2 is in the open state, if it is subjected to an external force instead of the driving force of the motor, the external force acts on the handle plate 2 and is decomposed by the connecting rod 8, and cannot make the handle plate 2 move in the closing direction, thereby preventing the safety risk of the hand being pinched.

[0067] In some embodiments of the above-described handle drive mechanism, the handle drive mechanism further includes a rack and pinion limiting assembly; a convex shaft 72 (which may be directly formed on the aforementioned pivot portion 71) protrudes from the center of the side of the rack 7 away from the first gear 6; see also Figure 8 and Figure 9 The rack and pinion limiting assembly includes a limiting base 300, a rocker arm 400, a movable plate 500, and a third spring 600. The limiting base 300 is fixed relative to the lock body 1. One end of the rocker arm 400 is pivotally connected to the limiting base 300, and the other end is provided with a socket 4001 that fits onto the convex shaft 72. The movable plate 500 and the third spring 600 are both fitted onto the rocker arm 400, and the movable plate 500 abuts against the convex shaft 72 under the elastic force of the third spring 600. When the rack 7 moves to the open or closed position, the motor 4 stops operating. At this time, the rack and pinion limiting assembly can provide resistance through the movable plate 500 and the third spring 600 to prevent the rack 7 from shaking, thereby ensuring that the handle plate 2 does not shake and is not easily opened or closed "accidentally" by external force, thus optimizing the user experience.

[0068] The aforementioned handle concealment structure can be applied to various smart locks, such as electronic combination locks, fingerprint locks, voiceprint locks, and iris locks, and possesses corresponding technical features and effects.

[0069] The handle plate 2 is provided with a clearance hole 21, which corresponds to the clearance and installation of some functional devices of the lock, such as the lock cylinder and fingerprint module.

[0070] The front of the aforementioned handle plate 2 is fitted with the control panel 700 of the smart lock, which is used for inputting passwords and other control operations.

[0071] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A handle concealment structure, characterized in that: Includes lock body, handle plate, handle drive mechanism and opening / closing components; The handle plate is movably fitted to the front of the lock body, and one side of the handle plate is pivotally fitted to the lock body to form a pivot axis parallel to one side of the handle plate; The handle drive mechanism is installed in the lock body and drives the handle plate, and is used to drive the handle plate to open and close around the pivot shaft, so that the handle groove formed between the other side of the handle plate and the lock body can be opened and closed. The opening and closing component is fixed relative to the handle plate and is arranged along a direction perpendicular to the side of the handle plate. It is also connected to the handle drive mechanism. One end of the opening and closing component is fixed relative to the lock body, and the other end of the opening and closing component can rotate around one end of the opening and closing component under the drive of the handle drive mechanism. The handle drive mechanism further includes a fixed base fixed relative to the lock body, and a rack slidably engaged between the fixed base and the lock body; the fixed base is provided with a movable opening for the opening / closing member to move and engage; one end of the opening / closing member is pivotally engaged with one end of the movable opening; a plurality of balls are engaged on the surface of the rack facing the fixed base, and a ball groove is provided in the fixed base for the balls to roll and engage; both ends of the fixed base are provided with pin holes, which penetrate the opposite sidewalls of the movable opening; both ends of the opening / closing member are provided with limit holes, the spacing of which is the same as the spacing of the pin holes; the back of the lock body is provided with mounting grooves corresponding to the positions of the two pin holes; each pin hole has a pin that can be inserted into the movable opening and its corresponding limit hole. A first spring is fitted onto the pin to provide elastic force so that one end of the pin disengages from the movable opening. A limiting member is provided at the other end of the pin, which, when engaged with the other end of the pin, drives the pin to compress the first spring and thus insert into the movable opening. A second spring is provided between the limiting member and the fixed base to provide elastic force so that the limiting member disengages from the end position of the pin and abuts against the lock body. A reversing member is detachably installed in a mounting groove opposite to the pin. The reversing member is fixed relative to the lock body and has a push rod that abuts against the limiting member, so that the limiting member compresses the second spring and engages with the end position of the pin, thereby allowing the pin to insert into the movable opening and its corresponding limiting hole.

2. The handle concealment structure as described in claim 1, characterized in that: The handle drive mechanism includes a motor electrically connected to the control part of the smart lock, a drive shaft driven by the motor, a first gear coaxially connected to the end of the drive shaft, and a connecting rod at both ends pivotally engaged with the opening / closing member and the rack, respectively. The rack is driven by the first gear and slides in the lock body along a direction perpendicular to the side of the handle plate. The linear motion of the rack is converted into the rotational motion of the other end of the opening / closing member through the connecting rod.

3. The handle concealment structure as described in claim 2, characterized in that: The handle drive mechanism further includes a second gear arranged parallel to and meshing with the first gear. The rack is arranged parallel to the end face of the first gear, and the first gear and the rack mesh with the second gear respectively. A pivot portion is formed by protruding from the middle of the side of the rack away from the first gear. The lower end of the connecting rod is pivotally engaged with the pivot portion. The opening and closing member is movably engaged above the pivot portion. The opening and closing member is provided with a slot for the connecting rod to be inserted and pivotally engaged. The side of the slot is provided with a clearance notch to make way for the pivot portion.

4. The handle concealment structure as described in claim 2, characterized in that: When the handle drive mechanism drives the handle plate to the open state, the included angle α between the axis of the connecting rod and the axis of the rack facing the opening and closing member is an acute angle.

5. The handle concealment structure as described in claim 2, characterized in that: The handle drive mechanism further includes a rack and pinion limiting assembly; a convex shaft protrudes from the center of the side of the rack away from the first gear; the rack and pinion limiting assembly includes a limiting base, a rocker arm, a movable plate, and a third spring; the limiting base is fixed relative to the lock body; one end of the rocker arm is pivotally connected to the limiting base, and the other end is provided with a socket for fitting onto the convex shaft; the movable plate and the third spring are both fitted onto the rocker arm, and the movable plate abuts against the convex shaft under the elastic force of the third spring.

6. The handle concealment structure as described in claim 1, characterized in that: The limiting member is provided with a plug portion that passes through the pin hole. The plug portion is provided with a first inclined surface, and the corresponding end of the pin is provided with a second inclined surface. The second inclined surface slides with the first inclined surface to allow the limiting member to push the pin. The lock body is provided with a limiting groove for the limiting member to move and cooperate. The limiting groove communicates with the mounting groove. The reversing member is provided with a limiting rod, which is used to limit the movement distance of the rack.

7. The handle concealment structure as described in claim 1, characterized in that: It also includes a blocking component, which, together with the reversing component, is respectively fitted into two mounting slots of the lock body.

8. A smart lock, characterized in that... Includes the handle concealment structure as described in any one of claims 1 to 7.

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