CN216602722U

CN216602722U - Automatic disinfection cleaning device of stair railing

Info

Publication number: CN216602722U
Application number: CN202122946697.XU
Authority: CN
Inventors: 陈亮; 林章敏; 刘晓敏; 邓浩
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-05-27
Anticipated expiration: 2031-11-29

Abstract

The utility model relates to an automatic disinfection and cleaning device for a stair handrail, which comprises a front shell and a rear shell, wherein the front shell and the rear shell are flexibly connected in front and at back, the front shell and the rear shell respectively comprise a left shell and a right shell, and telescopic assemblies for adjusting left and right distances are arranged between the left shell and the right shell; the front shell is provided with a liquid spraying component for spraying liquid on the outer periphery of the handrail, the rear shell is provided with a wiping component for wiping the outer periphery of the handrail, and the front shell and the rear shell are both provided with walking components for contacting the handrail and driving the device to move. This automatic disinfection cleaning device of stair railing's simple structure can replace artifical completion to the disinfection cleaning work of handrail, compact structure, easy operation, and the disinfection is clean effectual, low cost.

Description

Automatic disinfection cleaning device of stair railing

Technical Field

The utility model relates to an automatic disinfection and cleaning device for a stair railing.

Background

In order to quickly extinguish the spread of the virus and prevent the occurrence of the aggregated epidemic, the work of environmental sanitation and disinfection plays an important role. The stair handrail of the building is a key object in disinfection work because the stair handrail of the building is a public facility which is high in use rate in daily life and is in direct contact with people, and bacteria and viruses possibly remain on the surface of the stair handrail and cause harm to the people. The existing stair handrail is manually cleaned, so that manpower is wasted and efficiency is low. Therefore, the disinfection and cleaning device for the stair handrail is designed to replace manpower to complete the disinfection and cleaning work for the handrail.

SUMMERY OF THE UTILITY MODEL

In view of the shortcomings of the prior art, the technical problem to be solved by the utility model is to provide an automatic disinfection and cleaning device for a stair railing.

In order to solve the technical problems, the technical scheme of the utility model is as follows: an automatic disinfection and cleaning device for stair handrails comprises a front shell and a rear shell, wherein the front shell and the rear shell are flexibly connected in front and at the rear, the front shell and the rear shell respectively comprise a left shell and a right shell, and a telescopic assembly used for adjusting the left-right distance is arranged between the left shell and the right shell; the front shell is provided with a liquid spraying component for spraying liquid on the outer periphery of the handrail, the rear shell is provided with a wiping component for wiping the outer periphery of the handrail, and the front shell and the rear shell are both provided with walking components for contacting the handrail and driving the device to move.

Preferably, the flexible connection structure between the front shell and the rear shell comprises a left front connecting rod, a right front connecting rod, a left rear connecting rod, a right rear connecting rod and a middle connecting rod, the left front connecting rod is hinged to the top surface of the front left shell, the right front connecting rod is hinged to the top surface of the front right shell, the left rear connecting rod is hinged to the top surface of the rear left shell, the right rear connecting rod is hinged to the top surface of the rear right shell, the front end of the middle connecting rod is hinged to the left front connecting rod and the right front connecting rod through a spherical hinge, and the rear end of the middle connecting rod is hinged to the left rear connecting rod and the right rear connecting rod through a spherical hinge.

Preferably, the telescopic assemblies all comprise first motors installed inside the left shell, output shafts of the first motors face the right and are fixedly connected with screw rods penetrating out of the left shell towards the right and then continuously penetrating into the corresponding right shell, and screw rod nuts used for being in threaded connection with the screw rods are fixed inside the right shell.

Preferably, the liquid spraying assemblies are symmetrically arranged on the adjacent inner side walls of the front left shell and the front right shell, each liquid spraying assembly comprises a plurality of atomizing nozzles positioned on the inner side wall, liquid storage tanks are arranged inside the front left shell and the front right shell, the liquid storage tanks are connected to the corresponding plurality of atomizing nozzles through liquid outlet pipes, and booster pumps are arranged on the liquid outlet pipes; the left atomizing nozzles are aligned to the handrails towards the right and are vertically and uniformly distributed, and the right atomizing nozzles are aligned to the handrails towards the left and are vertically and uniformly distributed.

Preferably, the liquid storage tanks on the left side and the right side are communicated with each other through a liquid storage tank connecting hose.

Preferably, clean the subassembly and include the clean sponge piece in left side, the clean sponge piece in right side, the clean sponge piece in top, the clean sponge piece in left side connects the left shell inside wall in rear through two piece at least horizontal spring, the clean sponge piece in right side connects the right shell inside wall in rear through two piece at least horizontal spring, the clean sponge piece in top connects the left shell top in rear respectively through two piece at least inclined spring, rear right side shell top, the clean sponge piece in left side, the clean sponge piece in right side, the clean sponge piece in top corresponds the shape of cleaning the position with the handrail and suits.

Preferably, the walking components are respectively arranged at the lowest parts of the inner side walls of the front left shell and the front right shell and the rear left shell and the rear right shell; the walking subassembly is all including installing at the inside second motor of left and right shell, and the output shaft of second motor all has linked firmly scalable actuating lever down, and left scalable actuating lever all wears out the left casing towards the right through stepping down the channel bar, and the scalable actuating lever on right side all wears out the right casing towards the left through stepping down the channel bar.

Preferably, the telescopic driving rods comprise hollow fixed rods and moving rods inserted in the fixed rods, the adjacent inner end faces of the moving rods and the fixed rods are connected through springs, the uniform ends of the springs are fixedly connected with the moving rods, the other ends of the springs are fixedly connected with the fixed rods, and the free ends of the moving rods are provided with unidirectional rotating wheels; wherein, the wheel in the front is rotated unidirectionally upwards along the handrail, and the wheel in the rear is rotated unidirectionally downwards along the handrail.

Preferably, supporting members are arranged between the front left shell and the front right shell and between the rear left shell and the rear right shell, each supporting member comprises a left U-shaped frame and a right U-shaped frame, the U-shaped openings of the left U-shaped frames face the right, and the U-shaped openings of the right U-shaped frames face the left; the upper horizontal straight rod and the lower horizontal straight rod of the U-shaped opening of the left U-shaped frame are both hollow, and the upper horizontal straight rod and the lower horizontal straight rod of the U-shaped opening of the right U-shaped frame are both inserted into the hollow horizontal straight rods of the corresponding left U-shaped frame; the left shell and the right shell are of L-shaped structures which are arranged in a bilateral symmetry mode, the liquid spraying assembly, the wiping assembly and the walking assembly are located on the inner side wall of a vertical section of the L-shaped structure, the supporting members are located on a top horizontal section of the L-shaped structure, a vertical straight rod of the left U-shaped frame is a screw rod and vertically penetrates through a through hole of the left top horizontal section, the upper horizontal straight rod and the lower horizontal straight rod on the left side are arranged up and down through the top horizontal section, a vertical straight rod of the right U-shaped frame is a polished rod and vertically penetrates through a through hole of the right top horizontal section, and the upper horizontal straight rod and the lower horizontal straight rod on the right side are arranged up and down through the top horizontal section; the threads of the vertical straight rod of the left U-shaped frame are all screwed with ball nuts, and the ball nuts are all driven to rotate by an electric mechanism.

Compared with the prior art, the utility model has the following beneficial effects: this automatic disinfection cleaning device of stair railing's simple structure can replace artifical completion to the disinfection cleaning work of handrail, compact structure, easy operation, and the disinfection is clean effectual, low cost.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a first schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a second structural diagram of the embodiment of the present invention.

Fig. 3 is a third schematic structural diagram of the embodiment of the present invention.

Fig. 4 is a partial schematic view of a in fig. 3.

FIG. 5 is a fourth exemplary configuration of the present invention.

Fig. 6 is a fifth schematic structural diagram of the embodiment of the present invention.

Fig. 7 is a partially enlarged view B of fig. 6.

Detailed Description

The utility model is further explained by the following embodiments in conjunction with the drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1 to 7, the present embodiment provides an automatic disinfection and cleaning device for stair handrails, which includes a front housing 1 and a rear housing 2, the front and rear of the front housing and the rear housing are flexibly connected, the front housing and the rear housing both include a left housing 3 and a right housing 4, a telescopic assembly for adjusting a left-right distance is disposed between the left housing and the right housing, so as to adapt to handrails of different shapes and sizes, and simultaneously reduce a lateral distance of the device, so as to adapt to a working environment where a distance between the handrail 5 and a stair is narrow; the front shell is provided with a liquid spraying component for spraying liquid on the outer periphery of the handrail, the rear shell is provided with a wiping component for wiping the outer periphery of the handrail, and the front shell and the rear shell are both provided with walking components for contacting the handrail and driving the device to move.

In the embodiment of the utility model, the flexible connecting structure between the front shell and the rear shell consists of a left front connecting rod 6, a right front connecting rod 7, a left rear connecting rod 8, a right rear connecting rod 9 and a middle connecting rod 10, wherein the left front connecting rod is hinged to the top surface of the front left shell, the right front connecting rod is hinged to the top surface of the front right shell, the left rear connecting rod is hinged to the top surface of the rear left shell, the right rear connecting rod is hinged to the top surface of the rear right shell, the front end of the middle connecting rod is hinged to the left front connecting rod and the right front connecting rod through a spherical hinge 11, and the rear end of the middle connecting rod is hinged to the left rear connecting rod and the right rear connecting rod through a spherical hinge.

In the embodiment of the utility model, the telescopic assemblies respectively comprise a first motor 12 arranged in the left shell, the output shafts of the first motors are towards the right and fixedly connected with a screw rod 13 which penetrates out of the left shell towards the right and then continuously penetrates into the corresponding right shell, and a screw rod nut 14 which is used for being in threaded connection with the screw rod is fixed in the right shell.

In the embodiment of the utility model, the liquid spraying components are symmetrically arranged on the adjacent inner side walls of the front left shell and the front right shell, each liquid spraying component comprises a plurality of atomizing nozzles 15 positioned on the inner side wall, liquid storage tanks 16 are respectively arranged inside the front left shell and the front right shell, the liquid storage tanks are respectively connected to the corresponding plurality of atomizing nozzles through liquid outlet pipes 17, and booster pumps 18 are respectively arranged on the liquid outlet pipes; the left plurality of atomizing nozzle is aimed at the handrail towards the right and vertical equipartition, and the right plurality of atomizing nozzle is aimed at the handrail towards the left and vertical equipartition.

In the embodiment of the present invention, the liquid storage tanks on the left and right sides are communicated with each other through a liquid storage tank connection hose 19.

In the embodiment of the utility model, the sides of the atomizing nozzles are respectively provided with an ultraviolet lamp tube mounting chamber, the ultraviolet lamp tubes are respectively mounted in the mounting chambers, and the openings of the mounting chambers are respectively sealed by glass 20, so that the antifouling and waterproof functions of the ultraviolet lamp tubes are realized. The combined disinfection of disinfection by the disinfectant and the disinfection by ultraviolet rays can make the disinfection more efficient and comprehensive.

In the embodiment of the utility model, the wiping component comprises a left cleaning sponge block 21, a right cleaning sponge block 22 and a top cleaning sponge block 23, the left cleaning sponge block is connected with the inner side wall of a rear left shell through at least two horizontal springs 24, the right cleaning sponge block is connected with the inner side wall of a rear right shell through at least two horizontal springs, the top cleaning sponge block is respectively connected with the top of the rear left shell and the top of the rear right shell through at least two inclined springs 25, and the shapes of the left cleaning sponge block, the right cleaning sponge block and the top cleaning sponge block are matched with the shapes of corresponding wiping positions of handrails. The cleaning sponge block can be changed into different shapes to adapt to stair handrails with different shapes. Can make clean sponge piece paste tight stair handrail through horizontal spring, slope spring, the not unidimensional stair handrail of self-adaptation, through changing clean sponge piece, can realize the cleanness to different shape handrails with the sponge piece of curved sponge piece change into the sponge piece of other shapes. The wiping component also plays a certain supporting role for the whole device.

In the embodiment of the utility model, the walking components are respectively arranged at the lowest parts of the inner side walls of the front left shell and the front right shell and the rear left shell and the rear right shell; the walking subassembly is all including installing at the inside second motor 26 of left and right shell, and the output shaft of second motor all has linked firmly scalable actuating lever 27 down, and left scalable actuating lever all wears out the left casing towards the right side through stepping down the channel bar, and the scalable actuating lever on right side all wears out the right casing towards the left side through stepping down the channel bar.

In the embodiment of the utility model, the telescopic driving rods all comprise hollow fixed rods 28 and moving rods 29 inserted in the fixed rods, the moving rods and the adjacent inner end surfaces of the fixed rods are connected through springs 30, the uniform ends of the springs are fixedly connected with the moving rods, the other ends of the springs are fixedly connected with the fixed rods, and the free ends of the moving rods are provided with unidirectional rotating wheels 31; wherein, the wheel in the front is rotated unidirectionally upwards along the handrail, and the wheel in the rear is rotated unidirectionally downwards along the handrail.

In the embodiment of the utility model, the unidirectional rotating wheel adopts a unidirectional bearing, and the periphery of the unidirectional bearing is sleeved with rubber to increase the friction force. The spring in the telescopic driving rod can adapt to the change of the outer diameter of the handrail at the bending part of the handrail.

In the embodiment of the utility model, supporting members are arranged between the front left shell and the front right shell and between the rear left shell and the rear right shell, each supporting member comprises a left U-shaped frame 32 and a right U-shaped frame 33, the U-shaped openings of the left U-shaped frames face to the right, and the U-shaped openings of the right U-shaped frames face to the left; the upper horizontal straight rod 34 and the lower horizontal straight rod 34 at the U-shaped opening of the left U-shaped frame are both hollow, and the upper horizontal straight rod and the lower horizontal straight rod at the U-shaped opening of the right U-shaped frame are both inserted into the hollow horizontal straight rods of the corresponding left U-shaped frame; the left shell and the right shell are of L-shaped structures which are arranged in a bilateral symmetry mode, the liquid spraying assembly, the wiping assembly and the walking assembly are located on the inner side wall of a vertical section of the L-shaped structure, the supporting members are located on a top horizontal section of the L-shaped structure, a vertical straight rod 35 of the left U-shaped frame is a screw rod and vertically penetrates through a through hole of the left top horizontal section, so that an upper horizontal straight rod and a lower horizontal straight rod on the left side are arranged up and down through the top horizontal section, a vertical straight rod of the right U-shaped frame is a polished rod and vertically penetrates through a through hole of the right top horizontal section, and the upper horizontal straight rod and the lower horizontal straight rod on the right side are arranged up and down through the top horizontal section; the threads of the vertical straight rod of the left U-shaped frame are all screwed with ball nuts 36, and the ball nuts are all driven to rotate by an electric mechanism.

In the embodiment of the utility model, the electric mechanisms respectively comprise first bevel gears 37 which are coaxially arranged on a polished rod part 48 of a rod piece on which the screw rod is arranged, the first bevel gears are arranged in a left shell, the first bevel gears are respectively meshed with second bevel gears 38 which are arranged on the left shell, the end surfaces of the second bevel gears are horizontally arranged, the second bevel gears are respectively and coaxially fixedly connected with first straight-tooth cylindrical gears 39, the first straight-tooth cylindrical gears are respectively meshed with second straight-tooth cylindrical gears 40 which are arranged on the left shell, the second straight-tooth cylindrical gears are respectively meshed with third straight-tooth cylindrical gears 41 which are arranged on the left shell, the middle through holes of the third straight-tooth cylindrical gears are respectively and coaxially fixed with ball nuts, the top ends of the ball nuts are respectively provided with an upper concave ring which is embedded into the bottom end of an upper shaft sleeve 42 fixedly arranged at the top part in the left shell, the bottom ends of the ball nuts are respectively provided with a lower concave ring which is embedded into the top end of a lower shaft sleeve 43 fixedly arranged at the bottom part in the left shell, the vertical straight rod on the left side penetrates through the upper shaft sleeve, the ball nut and the lower shaft sleeve. The thread pitch of the vertical straight rod is half of that of the screw rod.

In the embodiment of the utility model, in order to facilitate the penetration of the liquid storage tank connecting hose, in the front supporting member, the front left vertical straight rod, the front right vertical straight rod, the front left lower horizontal straight rod and the front right lower horizontal straight rod are hollow and communicated, the side parts of the left vertical straight rod and the right vertical straight rod and the corresponding side parts of the lower shaft sleeve are respectively provided with a groove strip 44 extending up and down, and the left liquid storage tank connecting hose sequentially penetrates through the left vertical straight rod, the front left lower horizontal straight rod, the front right lower horizontal straight rod and the front right vertical straight rod from the inside of the supporting member to the right side and is connected with the right liquid storage tank.

In the embodiment of the utility model, the device further comprises a control module, and the control module consists of a power supply 49, a controller, an infrared sensor 45, a screen 46 and keys 47. The keys and the screen are fixedly arranged on the shell and used for inputting working parameters and displaying working states. The number of the infrared sensors is four, the infrared sensors are respectively positioned on the left side and the right side in front of the front shell and the left side and the right side behind the rear shell and are used for judging whether the device works to the end of the stair handrail.

The working method of the automatic disinfection and cleaning device for the stair handrail comprises the following steps: (1) firstly, the device is placed on a handrail, the bottom of a supporting member is supported at the top of the handrail, an electric mechanism drives a ball nut to rotate so as to enable the supporting member to adjust the position up and down, the upper and lower positions of a front shell and a rear shell are adjusted relative to the supporting member, a liquid spraying, wiping and walking assembly is located at a proper position of the handrail, the walking assembly is located at the lower half part of a circular handrail, and the stair handrail is clamped; (2) the first motor rotates to drive the screw rod to rotate, so that the distance between the left shell and the right shell is reduced, and the device can be stably clamped on a stair handrail; during clamping, the left side cleaning sponge block is contacted with the left side of the handrail, the right side cleaning sponge block is contacted with the right side of the handrail, and the top cleaning sponge block is contacted with the top of the handrail; the telescopic driving rods are swung to clamp the handrail, wheels are contacted with the outer surface of the handrail during clamping, and the device cannot slide up and down when not actively moving under the friction force generated by the contact of the front supporting member and the rear supporting member with the top of the handrail; (3) then, if the device needs to move upwards, the first two telescopic driving rods swing outwards first, the second two telescopic driving rods keep a clamping state, when the first two telescopic driving rods swing outwards, the telescopic driving rods extend under the action of springs, the wheels contact with the handrails to rotate upwards, rolling friction is achieved, then the first two telescopic driving rods swing inwards, the wheels cannot rotate downwards in one direction, friction between the wheels and the handrails is increased due to sliding friction, the telescopic driving rods are shortened due to spring compression, and meanwhile force for climbing the device is provided; if the device needs to move downwards, the two rear telescopic driving rods swing outwards first, the two front telescopic driving rods keep a clamping state, when the two rear telescopic driving rods swing outwards, the telescopic driving rods extend under the action of the springs, the wheels rotate downwards in contact with the handrails and are in rolling friction, then the two rear telescopic driving rods swing inwards, the wheels cannot rotate upwards in one direction, the friction between the wheels and the handrails is increased for sliding friction, the telescopic driving rods are shortened due to the compression of the springs, and meanwhile, the force for the device to move downwards is provided; (4) the device up moves the in-process, and the booster pump is taken the antiseptic solution out from the liquid storage pot to spray the stair railing from atomizing nozzle through the drain pipe on, carry out high-efficient comprehensive disinfection to the stair railing, open ultraviolet tube simultaneously, carry out high-efficient comprehensive disinfection to the stair railing through the disinfection mode of combination formula. Then the passing cleaning sponge block is close to the stair handrail to generate friction to wipe and clean the handrail, and meanwhile, disinfectant is wiped; the device can move up and down in a reciprocating way to perform repeated wiping; (5) when the device runs to the elbow of the handrail, flexible turning action is realized through the flexible connecting structure and the telescopic driving rod which can adapt to the size change of the elbow of the handrail. The device realizes the up-and-down movement of the stair handrail through the walking component and the flexible connection structure and flexibly passes through the turning part of the handrail. The stair handrail adapting to different shapes and sizes is realized through the telescopic assembly and the supporting member, the transverse size of the device can be reduced, the structure is more compact, the stair handrail adapting to the condition of small distance between the stair handrail and the stairs can be realized, and the application range is wide. Through built-in power supply and liquid storage pot, need not the external connection, can reduce the interference that the device produced in the work to enlarge the working range of device. The disinfection efficiency is improved by the combined disinfection mode of disinfectant spraying and ultraviolet irradiation. The device adopts a modular design, and has the advantages of compact structure, simple operation, low cost, high automation degree and high disinfection and cleaning effect. Can be widely applied to the disinfection and cleaning work of the stair handrail and reduce the labor intensity of workers.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a stair railing's self-sterilizer cleaning device which characterized in that: the front shell and the rear shell are flexibly connected with each other in front and at back, the front shell and the rear shell respectively comprise a left shell and a right shell, and telescopic assemblies for adjusting left and right distances are arranged between the left shell and the right shell; the front shell is provided with a liquid spraying component for spraying liquid on the outer periphery of the handrail, the rear shell is provided with a wiping component for wiping the outer periphery of the handrail, and the front shell and the rear shell are both provided with walking components for contacting the handrail and driving the device to move.

2. The automatic sanitizing and cleaning device for stair railing according to claim 1, wherein: the flexible connection structure between the front shell and the rear shell comprises a left front connecting rod, a right front connecting rod, a left rear connecting rod, a right rear connecting rod and a middle connecting rod, wherein the left front connecting rod is hinged to the top surface of a front left shell, the right front connecting rod is hinged to the top surface of a front right shell, the left rear connecting rod is hinged to the top surface of a rear left shell, the right rear connecting rod is hinged to the top surface of a rear right shell, the front end of the middle connecting rod is hinged to the left front connecting rod and the right front connecting rod through a spherical hinge, and the rear end of the middle connecting rod is hinged to the left rear connecting rod and the right rear connecting rod through a spherical hinge.

3. The automatic sanitizing and cleaning device for stair railing according to claim 1, wherein: the telescopic assembly comprises a first motor installed inside the left shell, an output shaft of the first motor faces the right and is fixedly connected with a lead screw penetrating out of the left shell towards the right and then continuously penetrating into the corresponding lead screw inside the right shell, and a lead screw nut used for being in threaded connection with the lead screw is fixed inside the right shell.

4. The automatic sanitizing and cleaning device for stair railing according to claim 1, wherein: the liquid spraying assemblies are symmetrically arranged on the adjacent inner side walls of the front left shell and the front right shell, each liquid spraying assembly comprises a plurality of atomizing nozzles positioned on the inner side wall, liquid storage tanks are arranged in the front left shell and the front right shell, the liquid storage tanks are connected to the corresponding atomizing nozzles through liquid outlet pipes, and booster pumps are arranged on the liquid outlet pipes; the left plurality of atomizing nozzle is aimed at the handrail towards the right and vertical equipartition, and the right plurality of atomizing nozzle is aimed at the handrail towards the left and vertical equipartition.

5. The automatic disinfecting and cleaning apparatus for stair railing according to claim 4, characterized in that: the liquid storage tanks on the left side and the right side are communicated with each other through a liquid storage tank connecting hose.

6. The automatic sanitizing and cleaning device for stair railing according to claim 1, wherein: clean the subassembly and include the clean sponge piece in left side, the clean sponge piece in right side, the clean sponge piece in top, the clean sponge piece in left side is through the left shell inside wall in two piece at least horizontal spring coupling rear, the clean sponge piece in right side is through the right shell inside wall in two piece at least horizontal spring coupling rear, the clean sponge piece in top connects the left shell top in rear respectively through two piece at least inclined spring, the right shell top in rear, the clean sponge piece in left side, the clean sponge piece in right side, the clean sponge piece in top shape suits with the shape that the position was cleaned in handrail correspondence.

7. The automatic sanitizing and cleaning device for stair railing according to claim 1, wherein: the walking components are respectively arranged at the lowest parts of the inner side walls of the front left shell and the front right shell and the rear left shell and the rear right shell; the walking subassembly is all including installing at the inside second motor of left and right shell, and the output shaft of second motor all has linked firmly scalable actuating lever down, and left scalable actuating lever all wears out the left casing towards the right through stepping down the channel bar, and the scalable actuating lever on right side all wears out the right casing towards the left through stepping down the channel bar.

8. The automatic sanitizing and cleaning device for stair railings according to claim 7, wherein: the telescopic driving rods comprise hollow fixed rods and moving rods inserted in the fixed rods, the adjacent inner end faces of the moving rods and the fixed rods are connected through springs, the uniform ends of the springs are fixedly connected with the moving rods, the other ends of the springs are fixedly connected with the fixed rods, and the free ends of the moving rods are provided with unidirectional rotating wheels; wherein, the wheel in the front is rotated unidirectionally upwards along the handrail, and the wheel in the rear is rotated unidirectionally downwards along the handrail.

9. The automatic sanitizing and cleaning device for stair railing according to claim 1, wherein: supporting members are arranged between the front left shell and the front right shell and between the rear left shell and the rear right shell, each supporting member comprises a left U-shaped frame and a right U-shaped frame, the U-shaped openings of the left U-shaped frames face the right, and the U-shaped openings of the right U-shaped frames face the left; the upper horizontal straight rod and the lower horizontal straight rod of the U-shaped opening of the left U-shaped frame are both hollow, and the upper horizontal straight rod and the lower horizontal straight rod of the U-shaped opening of the right U-shaped frame are both inserted into the hollow horizontal straight rods of the corresponding left U-shaped frame; the left shell and the right shell are of L-shaped structures which are arranged in a bilateral symmetry mode, the liquid spraying assembly, the wiping assembly and the walking assembly are located on the inner side wall of a vertical section of the L-shaped structure, the supporting members are located on a top horizontal section of the L-shaped structure, a vertical straight rod of the left U-shaped frame is a screw rod and vertically penetrates through a through hole of the left top horizontal section, the upper horizontal straight rod and the lower horizontal straight rod on the left side are arranged up and down through the top horizontal section, a vertical straight rod of the right U-shaped frame is a polished rod and vertically penetrates through a through hole of the right top horizontal section, and the upper horizontal straight rod and the lower horizontal straight rod on the right side are arranged up and down through the top horizontal section; the threads of the vertical straight rod of the left U-shaped frame are all in threaded connection with ball nuts, and the ball nuts are all driven to rotate by an electric mechanism.