A square shaft locking device for an intelligent door lock

Abstract

A square shaft locking device for an intelligent door lock relates to the technical field of intelligent door locks, and comprises a rear lock panel, a handle, a steering shaft and a square shaft, wherein a cavity is provided inside the square shaft, and two sets of channels are passed outward on both sides of the cavity, and a locking mechanism is provided in the cavity, which passes through the channels and fixes the square shaft to the clamping member; the square shaft locking device of the intelligent door lock adopts a micro motor built into the square shaft to drive the clamping block to clamp and lock the clamping member into the clamping member, so that the square shaft is clamped into the steering shaft and locked in the clamping member at the same time, and the clamping member is clamped on the protrusion by multiple sets of fastening parts on the clamping member, so that the clamping member can be firmly attached to the protrusion of the steering shaft, and the square shaft can be firmly fixed on the steering shaft by multiple fixing methods, and the square shaft will not be separated from the steering shaft even if the handle is turned multiple times, and the structure is compact.

Description

Technical Field

[0001] The present invention relates to the technical field of smart door locks, and in particular to a square shaft locking device for a smart door lock. Background Art

[0002] Nowadays, smart door locks are gradually widely used in every household. The basic mechanical principle of smart door locks is to use the handle to drive the rotation of the steering shaft, and then the square shaft installed inside the steering shaft rotates. The rotation of the square shaft rotates the socket of the lock body, thereby achieving unlocking or locking.

[0003] However, the square shaft is currently clamped into the socket of the steering shaft by directly clamping it. After it is rotated many times, the socket of the steering shaft and the square shaft may become loose due to wear of the firmware, and then there is a certain probability that the square shaft will be detached from the socket of the steering shaft, and finally the handle cannot be unlocked or locked, and the internal components of the smart door lock may even be damaged due to the detachment of the square shaft.

[0004] In view of these problems, how to provide a square shaft locking device for an intelligent door lock that can effectively fix the position of the square shaft and prevent the square shaft from detaching from the steering shaft even when the handle is turned multiple times is a technical problem that needs to be solved by technical personnel in this field. Summary of the Invention

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a square shaft locking device for an intelligent door lock, comprising a rear lock panel, a handle, a steering shaft and a square shaft, wherein the rear lock panel is provided with a handle, the bottom of the handle is connected to the top of the steering shaft, the middle of the steering shaft is provided with a socket A that penetrates the steering shaft, the square shaft is inserted into the socket A, and a clamp is provided at the connection between the steering shaft and the square shaft for fixing the square shaft so that it does not fall off the steering shaft, a cavity is provided inside the square shaft, and two sets of channels are passed outward on both sides of the cavity, a locking mechanism is provided in the cavity, and the square shaft is fixed to the clamp by passing through the channel through the locking mechanism;

[0006] The locking mechanism includes a driving assembly and two sets of locking assemblies. The driving assembly is installed at the bottom of the cavity, and two sets of locking assemblies are symmetrically arranged on the top of the cavity with the central axis of the driving assembly as the axis. The two sets of locking assemblies are respectively located on the two sets of channels.

[0007] The locking assembly includes a transmission part, a sliding part and a clamping block, one end of the transmission part is mounted on the driving assembly, the other end of the transmission part is mounted on one end of the sliding part, and the other end of the sliding part is connected to the clamping block, driving the clamping block to slide in the horizontal direction in the channel;

[0008] The transmission part includes a rotating shaft A, a telescopic rod, a rotating shaft B, a slider A and a slide rail A. The rotating shaft A is fixedly mounted on the driving assembly. One end of the telescopic rod is rotatably connected to the rotating shaft A. The other end of the telescopic rod is connected to the rotating shaft B. The rotating shaft B is fixedly mounted on the bottom of the slider A. The top of the slider A is slidably connected to the slide rail A. The slide rail A is arranged at the top of the cavity.

[0009] The sliding part includes a connecting rod, a connecting plate and two groups of sliding parts. One end of the connecting rod is installed and rotatably connected to the rotating shaft B, and the other end of the connecting rod is fixedly connected to the connecting plate. The connecting plate is located in the channel, and two groups of sliding parts are provided at its upper and lower ends respectively. The sliding parts include a slider B and a slide rail B. The slider B is installed at the end of the connecting plate, and the slider B is slidably connected to the slide rail B. The slide rail B is located on the inner wall of the channel.

[0010] Furthermore, the clamp includes a circular plate, a fastening portion, a socket B and a slot. One or more fastening portions are provided on the end surface of the circular plate, and one or more fastening portions are arranged in a circular ring structure around the edge of the circular plate. A socket B with a square structure is provided in the middle of the circular plate, and two groups of slots are provided on the inner side of the socket B, which are symmetrically arranged with the center of the circular plate as the central axis.

[0011] Furthermore, the steering shaft includes a disc, a cylinder and a protrusion. A cylinder is extended outward from the center top of the disc, and the handle is mounted on the cylinder. A protrusion is provided at the center bottom of the disc. The middle part of the protrusion is hollow and passes through the socket A. The inner wall of the protrusion is composed of four groups of right-angle blocks with included angles and four groups of arcuate edges.

[0012] Furthermore, the included angle of the right-angle block is 90°, and the inner side of the included angle is composed of an arc with a radius of 2.6MM.

[0013] Furthermore, the arc-shaped edge is composed of an arc-edge A and two groups of arc-edges B connected to both sides of the arc-edge A respectively.

[0014] Furthermore, the arc edge A is tangent to the two sets of arc edges B, and the midpoint of the arc edge A is located at the center of the insertion hole A.

[0015] Specifically, the angle of arc side A is 34° and the radius is 65MM, and the angle of arc side B is 17° and the radius is 30MM.

[0016] Furthermore, the drive assembly includes a motor, a screw, a bearing seat and a screw slider. The motor is installed at the bottom of the cavity, the motor shaft of the motor faces upward and is connected to one end of the screw, the other end of the screw is connected to the bearing seat, and the bearing seat is installed at the top of the cavity. The screw is threaded with a screw slider, and the side of the screw slider is fixedly connected to the rotating shaft A.

[0017] Furthermore, an annular disk is provided on the square shaft.

[0018] Compared with the prior art, the present invention adopts a micro motor built into the square shaft to drive the clamping block to clamp and lock the clamping groove inside the clamping part, so that the square shaft is clamped into the steering shaft and locked in the clamping part at the same time. The clamping part is clamped on the protruding part by multiple groups of fastening parts, so that the clamping part can be firmly attached to the protruding part of the steering shaft. Through multiple fixing methods, the square shaft can be firmly fixed on the steering shaft. Even if the handle is turned multiple times, the square shaft will not be separated from the steering shaft, and the structure is compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the square shaft locking device of the smart door lock of the present invention;

[0020] Figure 2 This is another structural schematic diagram of the square shaft locking device of the smart door lock of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the connection between the handle, steering shaft, clamp and square shaft of the square shaft locking device of the smart door lock of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the steering shaft of the square shaft locking device of the smart door lock of the present invention;

[0023] Figure 5 This is a schematic structural diagram of the clamp component of the square shaft locking device of the smart door lock of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the connection between the square shaft and the clamp of the square shaft locking device of the smart door lock of the present invention (in the locked state);

[0025] Figure 7 for Figure 6 A local enlarged view of point A;

[0026] Figure 8 This is a schematic diagram of the structure of the connection between the square shaft and the clamp of the square shaft locking device of the smart door lock of the present invention (in the unlocked state);

[0027] Figure 9 for Figure 8 A local enlarged view of point B;

[0028] Figure 10 This is another structural schematic diagram of the steering shaft of the square shaft locking device of the smart door lock of the present invention;

[0029] Figure 11 This is a bottom view of the steering shaft of the square shaft locking device of the smart door lock of the present invention;

[0030] Figure 12 for Figure 11 A local enlarged view of point C;

[0031] Figure 13 for Figure 12 A local enlarged view of point D;

[0032] Figure 14 for Figure 12 A local enlarged view of point E. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1-4 As shown, a square shaft locking device of an intelligent door lock includes a rear lock panel 1, a handle 2, a steering shaft 3 and a square shaft 5. The rear lock panel 1 is provided with a handle 2, the bottom of the handle 2 is connected to the top of the steering shaft 3, and the middle of the steering shaft 3 is provided with a socket A34 that penetrates the steering shaft 3. The square shaft 5 is inserted into the socket A34. By rotating the handle 2, the steering shaft 3 is rotated, and the rotation of the steering shaft 3 drives the rotation of the square shaft 5 installed in the socket A34, thereby unlocking or locking the lock body with the square shaft 5 inserted.

[0035] like Figure 3 and 5 As shown, a clamp 4 is provided at the connection between the steering shaft 3 and the square shaft 5 for fixing the square shaft 5 so that it does not fall off the steering shaft 3 , and the position of the square shaft 5 and the steering shaft 3 is fixed by the clamp 4 .

[0036] like Figure 6-9 As shown, a cavity 51 is provided inside the square shaft 5, and two sets of channels 56 are passed outward on both sides of the cavity 51. A locking mechanism is provided in the cavity 51, which passes through the channels 56 and fixes the square shaft 5 on the clamp 4; the locking mechanism locks the square shaft 5 on the clamp 4 so that the square shaft 5 will not fall off from the steering shaft 3 and the clamp 4.

[0037] The locking mechanism includes a driving assembly and two groups of locking assemblies. The driving assembly is installed at the bottom of the cavity 51, and two groups of locking assemblies are symmetrically arranged on the top with the central axis of the driving assembly as the axis. The two groups of locking assemblies are respectively located on two groups of channels 56; the driving assembly drives the two groups of locking assemblies to move horizontally on the channels 56, thereby realizing flexible extension and retraction of the locking assemblies.

[0038] The locking assembly includes a transmission part, a sliding part, and a clamping block 55. One end of the transmission part is mounted on the driving assembly, and the other end of the transmission part is mounted on one end of the sliding part. The other end of the sliding part is connected to the clamping block 55, which drives the clamping block 55 to slide horizontally in the channel 56.

[0039] The transmission part includes a rotating shaft A531, a telescopic rod 532, a rotating shaft B533, a slider A534 and a slide rail A535. The rotating shaft A531 is fixedly installed on the driving assembly. One end of the telescopic rod 532 is rotatably connected to the rotating shaft A531, and the other end of the telescopic rod 532 is connected to the rotating shaft B533. The rotating shaft B533 is fixedly installed on the bottom of the slider A534, and the top of the slider A534 is slidably connected to the slide rail A535. The slide rail A535 is arranged at the top of the cavity 51; the driving assembly is moved up and down, which drives the rotating shaft A531 installed on the driving assembly to move up and down, and the movement of the rotating shaft A531 drives the movement of the telescopic rod 532. At this time, the rotating shaft B533 at the other end of the telescopic rod 532 will follow the slider A534 to move horizontally in the length direction of the slide rail A535.

[0040] The sliding part includes a connecting rod 541, a connecting plate 542 and two groups of sliding parts. One end of the connecting rod 541 is installed and rotatably connected to the rotating shaft B533, and the other end of the connecting rod 541 is fixedly connected to the connecting plate 542. The connecting plate 542 is located in the channel 56, and two groups of sliding parts are respectively provided at its upper and lower ends. The sliding parts include a slider B543 and a slide rail B544. The slider B543 is installed at the end of the connecting plate 542. The slider B543 is slidably connected to the slide rail B544, and the slide rail B544 is located on the inner wall of the channel 56. The movement of the slider A534 drives the connecting rod 541 connected to it through the rotating shaft B533 to move in the horizontal direction of the channel 56. The movement of the connecting rod 541 drives the connecting plate 542 fixedly connected to it to move under the action of the slider B543 located on the slide rail B544, thereby causing the block 55 installed on the connecting plate 542B to move until the block 55 moves to the inside of the slot 44 in the circular plate 41, so that the square shaft 5 can be firmly locked in the clamp 4.

[0041] The clamp 4 includes a circular plate 41, a fastening portion 42, a socket B43, and a slot 44. One or more fastening portions 42 are provided on the end surface of the circular plate 41, and the one or more fastening portions 42 are arranged in a circular ring structure around the edge of the circular plate 41. A square socket B43 is provided in the middle of the circular plate 41, and two sets of slots 44 are provided inside the socket B43, symmetrically arranged about the center of the circular plate 41. The multiple sets of fastening portions 42 are clamped to the protrusion 33 at the bottom of the steering shaft 3, allowing the clamp 4 to be firmly clamped to the steering shaft 3, making it difficult for the clamp 4 to fall off the steering shaft 3.

[0042] The steering shaft 3 includes a disc 31, a cylinder 32 and a protrusion 33. The cylinder 32 is extended outward from the center top of the disc 31, and the handle 2 is mounted on the cylinder 32. The protrusion 33 is provided at the center bottom of the disc 31. The middle part of the protrusion 33 is hollow and passes through the insertion hole A34. The inner wall of the protrusion 33 is composed of four groups of right-angle blocks 331 as included angles and four groups of arcuate edges.

[0043] like Figure 10-14 As shown, the angle of the right-angle block 331 is 90°, and the inner edge of the angle is composed of an arc length with a radius of 2.6MM. The arc edge is composed of an arc edge A332 and two groups of arc edges B333 connected to both sides of the arc edge A332. The arc edge A332 is tangent to the two groups of arc edges B333, and the midpoint of the arc edge A332 is located at the center of the socket A34. The angle of the arc edge A332 is 34° and the radius is 65MM, and the angle of the arc edge B333 is 17° and the radius is 30MM. Through the arc-shaped right-angle block 331 and the action of the arc edge, the square shaft 5 does not need to be hard inserted into the socket A34 during installation. It only needs to be inserted into the socket A34 smoothly with a certain inclination angle.

[0044] The drive assembly includes a motor 521, a screw 522, a bearing seat 523, and a screw slider 524. The motor 521 is mounted at the bottom of the cavity 51. The motor shaft of the motor 521 faces upward and is connected to one end of the screw 522. The other end of the screw 522 is connected to the bearing seat 523. The bearing seat 523 is mounted at the top of the cavity 51. The screw 522 is threadedly connected to the screw slider 524, and the side of the screw slider 524 is fixedly connected to the rotating shaft A531. The rotation of the motor shaft of the motor 521 drives the screw 522 connected thereto to rotate, and the rotation of the screw 522 causes the screw slider 524, which is threadedly connected thereto, to move up and down along the length of the screw 522.

[0045] An annular disk 57 is provided on the square shaft 5 .

[0046] like Figure 6-7As shown, the specific installation method of the square shaft 5 is as follows: the staff first aligns the fastening portion 42 on the circular plate 41 with the protrusion 33 at the bottom of the steering shaft 3, and then moves toward the protrusion 33 until multiple sets of fastening portions 42 are tightly attached to the edge of the protrusion 33, and then the clamp 4 is tightly attached to the bottom of the protrusion 33, and the socket A34 on the protrusion 33 and the socket B43 on the circular plate 41 are located on the same straight line. At this time, the square shaft 5 is passed through the socket B43 and the socket A34 in turn until the annular disk 57 on the square shaft 5 is tightly attached to the bottom of the circular plate 41, and the square shaft 5 completes the insertion step. At this time, the staff starts the motor 521, and the rotation of the motor shaft of the motor 521 drives the rotation of the screw rod 522 connected to it. The rotation of the screw rod 522 causes the screw slider 524 threadedly connected to it to move upward along the length direction of the screw rod 522. When the screw slider 524 moves, the shaft A531 installed on the side of the screw slider 524 will also move with it. The movement of the shaft A531 drives the movement of the telescopic rod 532. At this time, the shaft B533 at the other end of the telescopic rod 532 will follow the slider A534 on the slide rail A. 535 moves horizontally in the length direction, and the movement of the rotating shaft B533 and the slider A534 drives the connecting rod 541 installed on the rotating shaft B533 to move in the horizontal direction of the channel 56. The movement of the connecting rod 541 drives the connecting plate 542 fixedly connected to it to move under the action of the slider B543 on the slide rail B544, thereby causing the block 55 installed on the connecting plate 542B to move until the block 55 moves to the inside of the slot 44 in the circular plate 41, so that the square shaft 5 can be firmly locked in the clamp 4, thereby completing the locking of the square shaft 5.

[0047] The present invention adopts a method in which a micro motor is built into the square shaft 5 to drive the clamping block 55 to clamp and lock the clamping groove 44 inside the clamping member 4, so that the square shaft 5 is clamped into the steering shaft 3 and locked in the clamping member 4 at the same time. The clamping member 4 is clamped on the protrusion 33 by multiple groups of fastening parts 42, so that the clamping member 4 can be firmly attached to the protrusion 33 of the steering shaft 3. Through multiple fixing methods, the square shaft 5 can be firmly fixed on the steering shaft 3. Even if the handle 2 is turned multiple times, the square shaft 5 will not be separated from the steering shaft 3, and the structure is compact.

[0048] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A square shaft locking device for a smart door lock, comprising a rear lock panel, a handle, a steering shaft, and a square shaft. The rear lock panel is provided with a handle, the bottom of the handle being connected to the top of the steering shaft. The middle portion of the steering shaft is provided with a socket A that passes through the steering shaft, and the square shaft is inserted into the socket A. The connection between the steering shaft and the square shaft is provided with a clamp for securing the square shaft so that it does not fall off the steering shaft. The device is characterized by: The square shaft is provided with a cavity inside, and two sets of channels are passed outward on both sides of the cavity. A locking mechanism is provided in the cavity, which passes through the channels and fixes the square shaft to the clamp. The clamp includes a circular plate, a fastening portion, a socket B and a slot. One or more fastening portions are provided on the end surface of the circular plate, and one or more fastening portions are arranged in a circular ring structure around the edge of the circular plate. A square socket B is provided in the middle of the circular plate, and two sets of slots are provided on the inner side of the socket B, which are symmetrically arranged with the center of the circular plate as the central axis. The steering shaft includes a disc, a cylinder, and a protrusion. A cylinder extends outward from the center top of the disc, and the handle is mounted on the cylinder. A protrusion is provided at the center bottom of the disc. The middle of the protrusion is hollow and passes through the socket A. The inner wall of the protrusion is composed of four groups of right-angle blocks with an included angle and four groups of arc-shaped edges. The included angle of the right-angle blocks is 90°, and the inner edge of the included angle is composed of an arc length with a radius of 2.6 mm. The locking mechanism includes a driving assembly and two sets of locking assemblies. The driving assembly is installed at the bottom of the cavity, and two sets of locking assemblies are symmetrically arranged on the top of the cavity with the central axis of the driving assembly as the axis. The two sets of locking assemblies are respectively located on the two sets of channels. The locking assembly includes a transmission part, a sliding part and a clamping block, one end of the transmission part is mounted on the driving assembly, the other end of the transmission part is mounted on one end of the sliding part, and the other end of the sliding part is connected to the clamping block, driving the clamping block to slide in the horizontal direction in the channel; The transmission part includes a rotating shaft A, a telescopic rod, a rotating shaft B, a slider A and a slide rail A. The rotating shaft A is fixedly mounted on the driving assembly. One end of the telescopic rod is rotatably connected to the rotating shaft A. The other end of the telescopic rod is connected to the rotating shaft B. The rotating shaft B is fixedly mounted on the bottom of the slider A. The top of the slider A is slidably connected to the slide rail A. The slide rail A is arranged at the top of the cavity. The sliding part includes a connecting rod, a connecting plate and two groups of sliding parts. One end of the connecting rod is installed and rotatably connected to the rotating shaft B, and the other end of the connecting rod is fixedly connected to the connecting plate. The connecting plate is located in the channel, and two groups of sliding parts are provided at its upper and lower ends respectively. The sliding parts include a slider B and a slide rail B. The slider B is installed at the end of the connecting plate, and the slider B is slidably connected to the slide rail B. The slide rail B is located on the inner wall of the channel.

2. The square shaft locking device of the smart door lock according to claim 1, characterized in that: The arc-shaped edge is composed of an arc edge A and two groups of arc edges B connected to both sides of the arc edge A respectively.

3. The square shaft locking device of the smart door lock according to claim 2, characterized in that: The arc edge A is tangent to the two sets of arc edges B, and the midpoint of the arc edge A is located at the center of the insertion hole A.

4. The square shaft locking device of the smart door lock according to claim 3, characterized in that: The angle of arc side A is 34° and the radius is 65MM, and the angle of arc side B is 17° and the radius is 30MM.

5. The square shaft locking device of the smart door lock according to claim 1, characterized in that: The drive assembly includes a motor, a screw, a bearing seat and a screw slider. The motor is installed at the bottom of the cavity, the motor shaft of the motor faces upward and is connected to one end of the screw, the other end of the screw is connected to the bearing seat, and the bearing seat is installed at the top of the cavity. The screw is threaded with a screw slider, and the side of the screw slider is fixedly connected to the rotating shaft A.

6. The square shaft locking device of the smart door lock according to claim 1, characterized in that: An annular disk is provided on the square shaft.

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