Automatic flushing device of closestool

Abstract

The utility model provides an automatic flushing device for a closestool, which comprises a box body, and a base is arranged at the bottom of the box body and used for being connected with a closestool water tank; the controller is arranged in the box body; the motor is arranged in the box body and electrically connected with the controller, and a gear is arranged on an output shaft of the motor; the rack is meshed with the gear and comprises a connecting rod which is at least partially positioned outside the box body; the pressing rod is arranged outside the box body, is opposite to the closestool flushing key and is connected with one end of the connecting rod, so that the pressing rod is driven to move when the motor drives the rack to move; the fixing sleeve is connected with the pressing rod and used for fixing the pressing rod, the fixing sleeve can be rotated to enable the pressing rod to move downwards during installation, and when the pressing rod moves to the position where the idle stroke of the toilet flushing key is eliminated, the pressing rod is stopped rotating, and the fixing sleeve fixes the pressing rod; after the pressing rod eliminates the idle stroke of the closestool button, the motor rotates to drive the pressing rod to move downwards, flushing can be carried out immediately, the flushing reaction is timely, a user does not need to stay near a closestool, and the user experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a toilet flushing technical field especially is related to a toilet automatic flushing device. BACKGROUND

[0002] With the improvement of the requirement of people for the convenience of toilet flushing, the application of the non-contact type toilet automatic flushing device is more and more extensive.

[0003] In the prior art, the toilet automatic flushing device comprises a fixed box, a motor and a gear are arranged in the fixed box, the motor is rotated to drive the gear to rotate, a moving frame is further arranged in the internal cavity of the fixed box, a rack is fixedly connected to one side of the outer surface of the moving frame, a moving rod is fixedly connected to the moving frame, an adjusting screw is arranged on the bottom of the moving rod, the motor is rotated to drive the gear to rotate, the gear drives the rack to rotate, so that the height of the adjusting screw is adjusted, and the moving rod can move up and down to press the toilet key.

[0004] Because the toilet key has a certain idle stroke, when the user issues a flushing instruction, the screw rod moves downward first to eliminate the idle stroke, the water outlet is not timely when the toilet key is pressed, and there is a certain delay, so the user needs to stay near the toilet for a long time to confirm whether the toilet is flushed, which brings inconvenience to the user. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a toilet automatic flushing device to solve the technical problem of the prior art that the water outlet is not timely when the toilet key is pressed.

[0006] The utility model provides a toilet automatic flushing device, which comprises a box body, a cavity is formed in the box body, a base is arranged at the bottom of the box body and is used for connecting a toilet water tank, a controller is arranged in the box body, a motor is arranged in the box body and is electrically connected with the controller, a gear is arranged on the output shaft of the motor, a rack is engaged with the gear, the rack comprises a connecting rod which is at least partially located outside the box body, a pressing rod is arranged outside the box body and is arranged opposite to a toilet flushing key, one end of the connecting rod is connected with the pressing rod, so that the screw rod moves when the motor drives the rack to move, a fixing sleeve is connected with the screw rod and is used for fixing the screw rod.

[0007] In some embodiments of the application, the fixing sleeve is a nut, the pressing rod is a screw rod, the nut and the screw rod are threadedly connected, and the nut is used for fixing the screw rod to eliminate the idle stroke of the toilet key.

[0008] In some embodiments of the application, the nut is arranged on one side of the connecting rod close to the base, so that the nut moves between the connecting rod and the base.

[0009] In some embodiments of the application, the height of the pressing rod is H1, the height of the box body is H2, and H1 is greater than or equal to H2.

[0010] In some embodiments of the present application, a limiting plate is further included, the limiting plate and the gear are oppositely arranged, the gear rack is arranged between the limiting plate and the gear, and at least two limiting protrusions extending towards the gear rack are arranged on the limiting plate; the two limiting protrusions are arranged in an up-down manner, and the gear rack is at least partially located in a gap between the two limiting protrusions, so that the gear rack is limited to move between the two limiting protrusions.

[0011] In some embodiments of the present application, a guide rail is further included, and the guide rail is in sliding connection with the gear rack; the gear rack comprises:

[0012] A connecting rod is arranged for connecting with the screw rod;

[0013] The connecting portion has a recess, and the shape of the recess is matched with the shape of the guide rail, so that part of the guide rail is in sliding connection in the recess.

[0014] In some embodiments of the present application, the guide rail comprises a track and a supporting portion, the supporting portion is fixedly connected with the base, the supporting portion is a plate-shaped structure extending in the same direction as the track, and the track is connected with the recess.

[0015] In some embodiments of the present application, nano glue is pasted between the base and the toilet tank, so that the base and the toilet tank are fixedly connected.

[0016] In some embodiments of the present application, the base has a bottom surface, and a base recess is arranged on the bottom surface; the automatic flushing device of the toilet further comprises a moving plate, the moving plate is at least partially arranged in the base recess, and the moving plate is in sliding connection with the base recess, so that the moving plate and the base are detachable.

[0017] In some embodiments of the present application, the automatic flushing device of the toilet comprises a radar, the radar is electrically connected with the controller, and the radar is a 60GHz millimeter wave radar module, a 24G millimeter wave radar module or a UWB ultra-wideband radar module.

[0018] The automatic flushing device of the toilet of the present application has at least the following positive effects:

[0019] The automatic flushing device of the closestool comprises a box body, a cavity is formed in the box body, a base is arranged at the bottom of the box body and is used for connecting a closestool water tank, a controller is arranged in the box body, a motor is arranged in the box body and is electrically connected with the controller, a gear is arranged on an output shaft of the motor, a rack is engaged with the gear, the rack comprises a connecting rod which is arranged at least partially outside the box body, a screw rod is arranged outside the box body and is arranged opposite to a closestool flushing button, one end of the connecting rod is connected with the screw rod, so that the screw rod is driven to move when the motor drives the rack to move, a fixing sleeve is connected with the screw rod and is used for fixing the screw rod, the screw rod is driven to move downward by rotating the fixing sleeve during installation, and when the screw rod is moved to the closestool flushing button and the idle stroke of the closestool flushing button is eliminated, the rotation of the screw rod is stopped and the position of the fixing sleeve is fixed, after the screw rod eliminates the idle stroke of the closestool button, the controller sends a signal to the motor, the motor rotates and drives the screw rod to move downward, so that the closestool can be flushed immediately, the flushing reaction is timely, the user does not need to stay near the closestool, and the user experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0021] Figure 1 A schematic diagram of the automatic flushing device of the closestool provided by the embodiments of the present application;

[0022] Figure 2 A top view of the automatic flushing device of the closestool provided by the embodiments of the present application;

[0023] Figure 3 A-A sectional view in Figure 2

[0024] A-A sectional view in Figure 4

[0025] A schematic diagram of the automatic flushing device of the closestool provided by the embodiments of the present application; Figure 5

[0026] A schematic diagram of the automatic flushing device of the closestool provided by the embodiments of the present application; Figure 6

[0027] A flow chart of the installation method of the automatic flushing device of the closestool provided by the embodiments of the present application; Figure 7

[0028] A partial sectional view of the automatic flushing device of the closestool provided by the embodiments of the present application; Figure 8The schematic view of the moving plate of the automatic flushing device of the closestool in the first position is provided for the embodiment of the utility model;

[0029] Figure 9 The schematic view of the moving plate of the automatic flushing device of the closestool in the second position is provided for the embodiment of the utility model;

[0030] Figure 10 The schematic view of the moving plate of the automatic flushing device of the closestool in the second position is provided for the embodiment of the utility model;

[0031] Figure 11 The schematic view of the moving plate of the automatic flushing device of the closestool is provided for the embodiment of the utility model;

[0032] Figure 12 The schematic view of the moving plate of the automatic flushing device of the closestool is provided for the embodiment of the utility model;

[0033] Icon: 100, automatic flushing device of closestool; 1, box body; 11, first opening; 2, base; 21, bottom surface; 23, base recess; 231, connecting side wall; 232, protruding block; 233, second opening; 24, third opening; 3, gear; 4, rack; 41, connecting rod; 42, connecting part; 421, recess; 5, screw rod; 6, fixed sleeve; 7, limiting plate; 71, limiting protruding part; 8, guide rail; 81, track; 82, supporting part; 9, moving plate; 91, first protruding part; 92, moving plate extension. DETAILED DESCRIPTION

[0034] The technical scheme of the utility model will be described clearly and completely below in combination with embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0036] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, the terms "first", "second", "third" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0037] In the present application, unless specifically defined and limited otherwise, the first feature above or below the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] With the increasing demand for the convenience of toilet flushing, touchless toilet automatic flushing devices are increasingly widely used. In the prior art, the toilet automatic flushing device comprises a fixed box, a motor and a gear are arranged in the fixed box, the motor is rotated to drive the gear to rotate, a moving frame is further arranged in the internal cavity of the fixed box, a rack is fixedly connected to one side of the outer surface of the moving frame, a moving rod is fixedly connected to the moving frame, an adjusting screw is arranged on the bottom of the moving rod, the motor is rotated to drive the gear to rotate, the gear drives the rack to rotate, so that the height of the adjusting screw is changed, and the moving rod can move up and down to press the toilet button.

[0039] Since the toilet button has a certain idle stroke, when the user issues a flushing instruction, the adjusting screw first moves downward to eliminate the idle stroke, and the toilet button cannot be directly pressed to discharge water, which has a certain delay, and the user needs to stay near the toilet for a long time to confirm whether to flush, which is inconvenient for the user.

[0040] Reference Figures 1-6 The present application provides a toilet automatic flushing device 100 capable of eliminating the idle stroke of the toilet button, the user can adjust the nut to fix the screw rod 5 above the toilet button, so that the idle stroke can be eliminated when the toilet automatic flushing device 100 is installed, the user does not need to determine whether to flush, and the user experience is enhanced.

[0041] The toilet automatic flushing device 100 comprises a box body 1, and a cavity is formed in the box body 1.

[0042] The toilet automatic flushing device 100 comprises a base 2, the base 2 is arranged at the bottom of the box body 1, the base 2 is connected with a toilet water tank, and the base 2 is used for fixing the toilet automatic flushing device above the toilet water tank.

[0043] The top surface of the box body 1 and the base 2 are oppositely arranged, and the extension direction of the box body 1 between the top surface and the base 2 is defined as the up-down direction.

[0044] The toilet automatic flushing device comprises a controller, and the controller is used for receiving instructions and sending signals.

[0045] The toilet automatic flushing device comprises a motor, the controller and the motor are electrically connected, when the controller receives a flushing instruction, the controller sends a signal to the motor, and the motor receives the signal of the controller to change the rotation direction.

[0046] The toilet automatic flushing device comprises a gear 3, the gear 3 is connected with the output shaft of the motor, and the gear 3 rotates synchronously with the output shaft of the motor when the motor rotates.

[0047] The toilet automatic flushing device comprises a rack 4, the rack 4 is arranged on one side of the gear 3, the gear 3 and the rack 4 are engaged, and the rack 4 moves in the up-down direction when the gear 3 rotates.

[0048] The automatic flushing device of the closestool comprises a pressing rod, the pressing rod is installed above the closestool button, the pressing rod is connected with the rack 4, when the motor rotates, the gear 3 rotates to drive the rack 4 to rotate up and down, so that the rack 4 drives the pressing rod to move up and down, so that the closestool button is pressed down or lifted up, so as to realize the flushing of the closestool.

[0049] In some embodiments, the pressing rod is a screw rod 5.

[0050] The automatic flushing device of the closestool comprises a guide rail 8, the guide rail 8 extends along the up and down direction, the rack 4 and the guide rail 8 are slidingly connected, so that the rack 4 can move in the up and down direction along the guide rail 8, the rack 4 slides along the guide rail 8, so that the movement path of the rack 4 is more stable, so that the probability of position deviation of the rack 4 during movement is reduced, so as to enhance the operation stability of the automatic flushing device of the closestool.

[0051] The rack 4 comprises a connecting rod 41 extending along the direction of the output shaft of the motor, one end of the connecting rod is provided with a hollow connecting hole, the screw rod 5 is connected in the connecting hole, so that the connecting rod can fix the position of the screw rod 5, the screw rod 5 can only move up and down in the connecting hole, so that the screw rod 5 is limited above the closestool button, so as to reduce the probability of position deviation of the screw rod 5 during long-term use.

[0052] The automatic flushing device 100 of the closestool comprises a fixing sleeve 6, the fixing sleeve 6 is threadedly connected with the pressing rod, and the pressing rod is arranged in the hole in the middle of the fixing sleeve 6. When the automatic flushing device 100 of the closestool is installed, the user can rotate the pressing rod by himself, so that the pressing rod moves downward until the idle stroke of the flushing button of the closestool is completely eliminated, and then the user uses the fixing sleeve 6 to fix the position of the pressing rod, so that the pressing rod is pressed downward until the idle stroke of the flushing button of the closestool is eliminated.

[0053] The prior art automatic flushing device 100 of the closestool can only control the position of the pressing rod by rotating the motor, during pre-installation, the installer can only set the pressing rod above the flushing button of the closestool, and cannot manually adjust the position of the pressing rod, the automatic flushing device 100 of the closestool of the present application sets the fixing sleeve 6 on the pressing rod, during installation, the fixing sleeve 6 can be rotated to move the pressing rod downward until the pressing rod moves to the position where the idle stroke of the flushing button of the closestool is eliminated, then the rotation of the pressing rod is stopped, and the fixing sleeve 6 fixes the position of the pressing rod; after the pressing rod eliminates the idle stroke of the closestool button, the controller sends a signal to the motor, the motor rotates to drive the pressing rod to move downward, so that the flushing can be immediately performed without reaction time, the user does not need to stay around the closestool, the user experience is improved, and obvious progress is made compared with the prior art.

[0054] In some embodiments, the fixing sleeve 6 is a nut, and the pressing rod is a screw rod 5. The nut and the screw rod 5 are threadedly connected, and the nut is used to fix the screw rod 5 at the position where the idle stroke of the flushing button of the closestool has been eliminated.

[0055] In some embodiments, the nut is arranged on one side of the connecting rod 41 close to the base 2, that is, the nut is arranged below the connecting rod 41, and the nut is rotated to change the extension height of the screw rod 5 below the nut, so that the screw rod 5 moves up and down, so that the user can change the position of the screw rod 5 according to the actual depth of the empty stroke of the toilet key, and the nut is limited below the connecting rod 41, so that the nut is blocked below the connecting rod 41 during rotation, so that the nut moves between the connecting rod 41 and the base 2, and the nut will not fall off the screw rod 5, reducing the probability of the nut falling off.

[0056] In some embodiments of the present application, the height of the pressing rod is H1, the height of the box body 1 is H2, and H1≥H2. When the pressing rod is the screw rod 5, the height of the screw rod 5 is high enough, and the distance range of the screw rod 5 moving up and down driven by the rotation of the nut is larger, so that the screw rod 5 can meet the needs of eliminating the empty stroke of various toilet flushing keys, and the application range is wider.

[0057] In some embodiments of the present application, the automatic flushing device 100 for the toilet comprises a radar, and the radar and the controller are electrically connected to transmit the signal collected by the radar to the controller, and the controller receives the radar signal and calculates whether it needs to be flushed.

[0058] The radar is a 60GHz millimeter wave radar module or a 24G millimeter wave radar module or a UWB ultra-wideband radar module, so that the discrimination of the radar signal is more accurate, and the anti-interference ability of the radar signal is stronger.

[0059] In some embodiments of the present application, the controller is configured to: when receiving a start signal, send a signal to the motor to drive the screw rod 5 to move to the highest position. The user can rotate the nut to press the screw rod 5 downward, so that the screw rod 5 presses downward to eliminate the empty stroke of the toilet flushing key, and the rotation of the nut will not damage the toilet flushing key due to the initial position of the screw rod 5 being too low.

[0060] In some embodiments of the present application, the automatic flushing device for the toilet further comprises a limiting plate 7, the rack 4 is arranged between the limiting plate 7 and the gear 3, the rack 4 and the limiting plate 7 are in contact, the limiting plate 7 is provided with at least one limiting protrusion 71 extending towards the rack 4, and the rack 4 is at least partially located on the upper side or the lower side of the protrusion, so that the limiting protrusion 71 limits the up-down movement distance of the rack 4, and when the rack 4 abuts against the limiting protrusion 71, the rack 4 cannot continue to move in the original direction, thereby avoiding the collision between the rack 4 and the box body 1, and limiting the up-down movement distance of the screw rod 5 driven by the rack 4, so that the screw rod 5 moves up and down within a predetermined distance range.

[0061] In some embodiments, the limiting plate 7 and the gear 3 are arranged oppositely, the rack 4 is arranged between the limiting plate 7 and the gear 3, the limiting plate 7 is provided with at least two limiting protrusions 71 extending towards the rack 4, the two limiting protrusions 71 are arranged in an up-down manner, and the rack 4 is at least partially located in a gap between the two limiting protrusions 71, so that the rack 4 is limited to move between the two limiting protrusions 71.

[0062] The rack 4 can only move within the up-down distance range defined by the two limiting protrusions 71, so that the distance of the up-down movement of the rack 4 is limited, the probability of the rack 4 colliding with the box body 1 is reduced, and the moving distance of the screw rod 5 driven by the rack 4 is also limited, so that the screw rod 5 can press the flush toilet button within an effective distance.

[0063] In some embodiments of the present application, the rack 4 comprises a connecting portion 42 and a connecting rod 41, the connecting rod 41 is used to be connected with the screw rod 5, the connecting portion 42 is provided with a recess 421, the shape of the recess 421 is matched with the shape of the guide rail 8, so that part of the guide rail 8 is slidingly connected in the recess 421.

[0064] One side of the connecting portion 42 is provided with straight teeth extending in the up-down direction, the straight teeth are engaged with the gear 3, the gear 3 drives the connecting portion 42 to move up and down, so that the rotation of the motor output shaft is converted into the up-down movement of the connecting portion 42, the connecting portion 42 is provided with the recess 421, the shape of the recess 421 is matched with the shape of the track 81 of the guide rail 8, so that part of the guide rail 8 is slidingly connected in the recess 421, so that the connecting portion 42 can only move up and down along the guide rail 8, so that the sliding is more stable when the connecting portion 42 drives the connecting rod 41 to move.

[0065] The extending direction of the connecting rod 41 and the extending direction of the connecting portion 42 form an included angle of 90°, so that the connecting portion 42 drives the connecting rod 41 to move up and down when the connecting portion 42 moves, and the connecting rod 41 is sleeved outside the screw rod 5.

[0066] In some embodiments of the present application, the guide rail 8 comprises a track 81 and a supporting portion 82. The supporting portion 82 is fixedly connected with the base 2, the supporting portion 82 is a plate-shaped structure extending in the same direction as the track 81, i.e. extending in the up-down direction, the supporting portion 82 is connected with the base 2, so that the track 81 and the base 2 are fixedly connected.

[0067] The track 81 is a convex structure connected in the recess 421, the track 81 is arranged as a structure in which a longitudinal rectangle and a transverse rectangle are connected, which can make the connection of the track 81 and the recess 421 more stable, the track 81 is blocked by the recess 421, which reduces the probability of separation of the track 81 and the recess 421, and makes the connection of the rack 4 and the guide rail 8 more stable when the rack 4 moves.

[0068] In some embodiments of the present application, the base 2 and the toilet tank are pasted with nano glue, and the nano glue has strong adhesion, so that the base 2 and the toilet tank are fixedly connected, thereby the base 2 is stably pasted on the top surface of the toilet tank.

[0069] Referring to Figures 7-12 In some embodiments of the present application, the base 2 has a bottom surface 21 connected with the toilet tank, and the bottom surface 21 is provided with a base recessed portion 23 recessed toward the top surface of the box body 1, and a cavity is formed in the base recessed portion 23.

[0070] The automatic flushing device 100 of the toilet comprises a moving plate 9, the moving plate 9 and the base 2 are slidingly connected, and the moving plate 9 is at least partially arranged in the base recessed portion 23, so that the moving plate 9 can slide in the base recessed portion 23, and the moving plate 9 and the base 2 are slidingly connected, so that the moving plate 9 and the base 2 can be separated.

[0071] The moving plate 9 can slide to at least three positions:

[0072] In the first position, the top end of the moving plate 9 is moved to be in contact with the blocking side wall of the base recessed portion 23, the moving plate 9 is installed with the base 2, and the moving plate 9 is installed at the bottom of the base 2;

[0073] In the second position, the distance between the top end of the moving plate 9 and the blocking side wall of the base recessed portion 23 is L1, the extension length of the moving plate 9 along the sliding direction is L2, and L1 < L2, at this time, the moving plate 9 is in the process of sliding out of or sliding into the base recessed portion 23;

[0074] In the third position, the distance between the top end of the moving plate 9 and the blocking side wall of the base recessed portion 23 is L3, and L3 ≥ L1, so that the moving plate 9 and the base 2 are separated, the base recessed portion 23 is exposed to the external environment, and the user can easily connect the cable into the interface in the base recessed portion 23.

[0075] Referring to Figure 6 The installation method of the automatic flushing device 100 of the toilet will be described in detail below:

[0076] The automatic flushing device 100 of the toilet is installed above the toilet tank, the fixed box and the tank are fixedly connected, the base 2 is adjusted to be clamped with the tank, and the screw rod 5 is moved to be directly above the toilet flushing button;

[0077] The automatic flushing device 100 of the toilet is powered on, the controller sends a signal to the motor, and the motor rotates to move the screw rod 5 to the initial position at the highest point;

[0078] The screw rod 5 is rotated to move downward until the empty stroke of the screw rod 5 pressing the toilet flushing button is completely eliminated;

[0079] The rotating nut is to lock the position of the screw rod 5, so that the screw rod 5 stays at the position of completely eliminating the empty stroke of the flushing button of the closestool.

Claims

1. A toilet automatic flushing device, characterized by, The application relates to a toilet automatic flushing device. The device comprises a box body, a base, a controller, a motor, a rack and a pressing rod. The base is arranged at the bottom of the box body and is used for connecting a toilet water tank. The controller is arranged in the box body. The motor is arranged in the box body and is electrically connected with the controller. A gear is arranged on the output shaft of the motor. The rack is engaged with the gear. The rack comprises a connecting rod which is arranged at least partially outside the box body.

2. The automatic flushing device for toilet according to claim 1, wherein The pressing rod is arranged outside the box body and is arranged opposite to a toilet flushing button.

3. A toilet automatic flushing device according to claim 2, characterized in that One end of the connecting rod is connected with the pressing rod. When the motor drives the rack to move, the pressing rod is driven to move.

4. A toilet automatic flushing device according to claim 1 or 2 or 3, characterized in that, The fixing sleeve is connected with the pressing rod and is used for fixing the pressing rod. The fixing sleeve is a nut, the pressing rod is a screw rod, the nut and the screw rod are threadedly connected, and the nut is used for fixing the screw rod to eliminate the idle stroke of the toilet flushing button.

5. The automatic flushing device for toilet according to claim 1 or 2 or 3, characterized in that, The nut is arranged on one side of the connecting rod close to the base so that the nut moves between the connecting rod and the base.

6. The automatic flushing device according to claim 2 or 3, wherein The height of the pressing rod is H1, and the height of the box body is H2. The height of the pressing rod is H1, and the height of the box body is H2. The device further comprises a limiting plate which is arranged opposite to the gear.

7. A toilet automatic flushing device according to claim 6, characterized in that The rack is arranged between the limiting plate and the gear.

8. The automatic toilet flushing apparatus according to claim 1 or 2, characterized by At least two limiting protrusions are arranged on the limiting plate and extend towards the rack.

9. The automatic toilet flushing apparatus according to claim 1 or 2, characterized by The two limiting protrusions are arranged in an up-down mode.

10. The automatic toilet flushing apparatus according to claim 1 or 2, characterized by The rack is arranged at least partially in the gap between the two limiting protrusions so that the rack is limited to move between the two limiting protrusions. The device further comprises a guide rail which is slidably connected with the rack. The rack comprises a connecting rod which is used for being connected with the screw rod. The connecting rod comprises a connecting part which has a recess. The shape of the recess is matched with the shape of the guide rail so that part of the guide rail is slidably connected in the recess. The guide rail comprises a track and a supporting part. The supporting part is fixedly connected with the base. The supporting part is a plate-shaped structure which extends in the same direction as the track. The track is connected with the recess. Nano glue is arranged between the base and the toilet water tank so that the base and the toilet water tank are fixedly connected. The base has a bottom surface. The bottom surface is provided with a base recess. The device further comprises a moving plate which is arranged at least partially in the base recess. The moving plate is slidably connected with the base recess so that the moving plate and the base can be separated. The device comprises a radar which is electrically connected with the controller. The radar is a 60GHz millimeter wave radar module, a 24G millimeter wave radar module or a UWB ultra-wideband radar module.

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