CN113617706B

CN113617706B - Lifting electronic screen

Info

Publication number: CN113617706B
Application number: CN202110866689.6A
Authority: CN
Inventors: 魏建
Original assignee: Dongguan Huaisen Technology Co ltd
Current assignee: Dongguan Huaisen Technology Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-10-18
Anticipated expiration: 2041-07-29
Also published as: CN113617706A; CN116274011A; CN116274010A

Abstract

The invention discloses a lifting electronic screen, which comprises an electronic screen body, a shell, a driving mechanism, a cleaning mechanism and a liquid supply mechanism, wherein the electronic screen body is arranged on the shell; the electronic screen body is vertically and slidably connected with the shell, the driving mechanism is installed in the shell, the cleaning mechanism is installed on the left side of the driving mechanism, the liquid supply mechanism is fixedly installed on the cleaning mechanism, and the driving mechanism is in transmission connection with the electronic screen body; the invention saves the using amount of the cleaning solution on the premise of not reducing other functions of the lifting electronic screen body, and simultaneously provides a good storage environment for the electronic screen body.

Description

Lifting electronic screen

Technical Field

The invention relates to the production of an electronic screen body, in particular to a lifting electronic screen.

Background

The electronic screen comprises an LED screen and an OLED screen, and is a screen body formed by a plurality of display units which can be combined and spliced, and a set of appropriate controller (a main control board or a control system) is added. Therefore, the display units with various specifications can be matched with controllers with different control technologies to form a plurality of electronic screens so as to meet the requirements of different environments and different display requirements.

Conventional electronic screen cleaning method, many pass through the cleaning part after spraying the cleaning solution, directly slide to the other end by electronic screen one end and clear up, this kind of mode, the cleaning solution on the cleaning part is if the cleaning solution quantity in whole cleaning process will be satisfied, it is inevitable, can produce remaining cleaning solution on the first abluent one end screen of electronic screen, even have the cleaning solution to drip to the casing on the screen, and then when the cleaning solution is extravagant, because the electronic screen is taken in behind the inclosed casing if in-process that the electronic screen rises out of the casing, wash, at first, it is equally unable to avoid the cleaning solution to drip to the casing by on the screen, secondly, after the electronic screen uses outside the casing, to some stubborn blots, accompany the time and lengthen, its clearance degree of difficulty can increase thereupon, and the in-process that the electronic screen rises out of the casing, wash, along with the time of electronic screen at the casing becomes for a long time, the washing degree of difficulty grow on the electronic screen, easily take place the phenomenon of wasing incompletely, because of the inclosed reason of casing. The residual cleaning liquid is not easy to be discharged out of the shell, so that the humidity inside the shell is improved, the electronic screen is stored in a higher humidity environment, and the service life of the electronic screen is further shortened; in order to prevent the screen surface from having residual cleaning liquid and reduce the spraying amount of the cleaning liquid, the cleaning effect is poor and the cleaning is not clean due to the lack of the cleaning liquid at the cleaning end of the electronic screen; it is difficult to achieve balance between the two.

Based on this, the invention designs a lifting electronic screen to solve the above problems.

Disclosure of Invention

The invention aims to provide a lifting electronic screen, which aims to solve the problems that a conventional electronic screen cleaning mode is provided in the background art, and most cleaning parts are sprayed with cleaning liquid and one end of the electronic screen directly slides to the other end of the electronic screen for cleaning, so that the cleaning liquid on the cleaning parts inevitably needs to meet the consumption of the cleaning liquid in the whole cleaning process, residual cleaning liquid is generated on the screen of one end of the electronic screen which is cleaned at first, even the cleaning liquid drips into the shell from the screen, and further the cleaning liquid is wasted. The residual cleaning liquid is not easy to be discharged out of the shell, so that the humidity inside the shell is improved, the electronic screen is stored in a higher humidity environment, and the service life of the electronic screen is further shortened; in order to prevent the screen surface from having residual cleaning liquid and reduce the spraying amount of the cleaning liquid, the cleaning effect is poor and the cleaning is not clean due to the lack of the cleaning liquid at the cleaning end of the electronic screen; the balance between the two is difficult to achieve.

In order to achieve the purpose, the invention provides the following technical scheme: a lifting electronic screen comprises an electronic screen body, a shell, a driving mechanism, a cleaning mechanism and a liquid supply mechanism; the electronic screen body is vertically and slidably connected with the shell, the driving mechanism is installed in the shell, the cleaning mechanism is installed on the left side of the driving mechanism, the liquid supply mechanism is fixedly installed on the cleaning mechanism, and the driving mechanism is in transmission connection with the electronic screen body; the driving mechanism is used for driving the electronic screen body to move at a constant speed and driving the cleaning mechanism to move intermittently.

As a further scheme of the present invention, the driving mechanism includes a first transmission mechanism, the first transmission mechanism includes a first lead screw, a third gear is fixedly connected to a lower end of the first lead screw, a second slider is connected to the first lead screw in a threaded manner, a second gear is vertically connected to an upper end of the first lead screw in a sliding manner, and the second gear is rotatably mounted on a top surface of the second slider;

a second transmission mechanism is arranged below the third gear, the second transmission mechanism comprises a second lead screw, the top end of the second lead screw is in threaded connection with a wheel disc, the wheel disc comprises a rotary disc, a sliding rail is arranged on the rotary disc, the third gear is in sliding connection with the sliding rail, a fourth gear is fixedly connected to the upper end of the rotary disc, and the fourth gear is meshed with the third gear; the lower end of the second screw rod is in transmission connection with a motor, and the motor is fixedly connected with the shell;

a second guide rail is fixedly arranged on the inner wall of the right side of the shell, the second sliding block is vertically and slidably connected with the second guide rail, a first guide rail is fixedly arranged on the inner wall of the left side of the shell, a first sliding block is slidably connected with the first guide rail, and the first sliding block and the second sliding block are respectively and fixedly connected with the bottoms of the left side wall and the right side wall of the electronic screen body; a first rotating shaft is vertically arranged on the second guide rail, a plurality of gear teeth which are distributed at equal intervals are vertically arranged on the first rotating shaft, and the gear teeth are positioned below the second gear and can be meshed with the gear teeth II;

the maximum static friction force of the threaded connection between the first screw rod and the second sliding block is far smaller than the maximum static friction force of the threaded connection between the second screw rod and the wheel disc; the transmission ratio of the motor to the second sliding block is the same as the transmission ratio of the motor to the wheel disc.

As a further aspect of the present invention, the gear teeth are elastic expansion members, and can elastically contract in the vertical direction.

As a further scheme of the invention, the cleaning mechanism comprises a fixed block, a second connecting rod is fixedly connected to the side wall of the fixed block, the second connecting rod is rotatably connected with the upper end of the first screw rod, the fixed block is horizontally provided with a wiping mechanism in a penetrating manner, the wiping mechanism comprises a second rotating shaft, the second rotating shaft penetrates through and is movably arranged on the fixed block, the left end of the second rotating shaft is horizontally movably provided with a third sliding block, the inner wall of the left side of the shell is vertically provided with a third guide rail and a rack, and the third sliding block is slidably connected with the third guide rail; fixedly connected with is a plurality of equidistance distribution and is located the sponge piece between third slider and the fixed block on the outer wall of second pivot, fixedly connected with third connecting rod on the third slider lateral wall, it is connected with the fourth connecting rod to rotate in the second pivot, the front end of third connecting rod rotates and is connected with the fifth gear, fifth gear and rack toothing, the connecting rod is installed in the rotation of fifth gear terminal surface, the connecting rod other end rotates with the fourth connecting rod and is connected.

As a further scheme of the present invention, the first rotating shaft is rotatably connected to the second guide rail through a torsion spring, and the rotating angle is fixed, the side wall of the first rotating shaft is provided with a first gear, and the first gear is a part of an arc-shaped surface of a complete first gear segment; the right end of the second rotating shaft is fixedly connected with a telescopic rod, the right end of the telescopic rod is fixedly connected with a first bevel gear, the fixed block is fixedly connected with a first connecting rod, the first connecting rod is rotatably connected with a second bevel gear, and the second bevel gear is respectively meshed with the first bevel gear and the first gear.

As a further scheme of the invention, the lower end of the cleaning mechanism is fixedly provided with a scraper, and the electronic screen body can be in close contact with the scraper when passing through the scraper.

As a further scheme of the invention, the liquid supply mechanism comprises a spraying mechanism, the spraying mechanism is installed above the wiping mechanism, the spraying mechanism comprises a fixed rod, the fixed rod is fixedly connected with a fifth connecting rod, the fifth connecting rod is fixedly connected with the upper end of the fixed block, and the lower end surfaces of the fifth connecting rod are fixedly provided with spray heads at positions corresponding to the sponge block;

the liquid supply mechanism further comprises a liquid outlet cylinder, the liquid outlet cylinder is fixedly connected with a third sliding block, a pressing plate is vertically and slidably mounted on the liquid outlet cylinder, the liquid outlet cylinder and the pressing plate jointly form a closed container, a sixth connecting rod is fixedly connected to the upper end of the pressing plate, the sixth connecting rod is fixedly connected with the first sliding block, a liquid outlet pipe and a liquid inlet pipe are fixedly mounted on the liquid outlet cylinder, the liquid outlet pipe and the spray head are both communicated with each other through a first external communicating pipe, and the liquid inlet pipe is externally connected with a cleaning liquid container; and check valves are arranged in the liquid outlet pipe and the liquid inlet pipe.

As a further scheme of the invention, the upper end of the shell is detachable.

As a further aspect of the present invention, the track grooves of the first rail, the second rail, and the third rail are square.

As a further scheme of the invention, the surface of the scraper, which can be contacted with the electronic screen body, is made of a flexible water-absorbing material.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the cleaning solution is sprayed when the cleaning mechanism moves relative to the electronic screen body by driving the cleaning mechanism to intermittently move relative to the electronic screen body, and when the cleaning mechanism is relatively static, the electronic screen body is cleaned, so that a little cleaning solution is sprayed, and a part of screen surface is cleaned, so that the cleaning solution sprayed each time just meets the cleaning of the screen surface, and meanwhile, no cleaning solution residue is generated.

2. The invention utilizes two pairs of screw rod transmission parts to be connected with each other for transmission, and realizes the mode that when a nut component in one pair of screw rod transmission parts is fixed, the other pair of screw rod transmission parts moves, and realizes the gapless fit movement of the two transmission parts, so that an electronic screen body moves at a uniform speed, a cleaning mechanism moves intermittently, in the two transmission parts, the upper transmission part only controls the electronic screen body to move, and the lower transmission part controls the electronic screen body and the cleaning mechanism to move, when the transmission of the two transmission parts is switched to have no gap, the electronic screen body moves at a uniform speed, and simultaneously, the cleaning mechanism moves intermittently by taking the single movement path of the two transmission parts as the amplitude, further, when the cleaning mechanism is static each time, the displacement relative to the electronic screen body is fixed, so that the traditional transmission part electronic screen body moves at a uniform speed, and the cleaning mechanism usually controls the electronic screen body and the cleaning mechanism to move independently, and is related by an electronic element, the mode can generate movement errors, and the relative preset relative displacement between the electronic screen body and the cleaning mechanism can not be misplaced after long-term use, so that the matched movement between the electronic screen body and the cleaning mechanism can not be misplaced completely as: the displacement of the cleaning mechanism is smaller than a preset value, and after the cleaning mechanism is used for multiple times, the cleaning mechanism is positioned below an initial position in the cleaning starting stage, so that the upper end part of the electronic screen body cannot be cleaned; correspondingly, in the mechanical transmission link, the motion between the electronic screen body and the cleaning mechanism is in relevant fit through the mechanical structure, so that the electronic screen body and the cleaning mechanism are prevented from being in fit dislocation, the whole plane of the electronic screen body can be cleaned, and the cleaning effect of the equipment is improved.

3. But through the elastic shrinkage nature of the teeth of a cogwheel, make the tooth clearance of the teeth of a cogwheel and second gear not vertical when just right, the second gear continues to move down and can not crush the teeth of a cogwheel, and is further, prevents that equipment from damaging, improves the stability of equipment.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic front sectional view of the overall structure of the present invention;

FIG. 3 is a schematic view of the general structure of the present invention with the housing removed;

FIG. 4 is an enlarged view of the point A in FIG. 3;

FIG. 5 is a schematic view of the driving mechanism;

FIG. 6 is a schematic view of the cleaning mechanism;

FIG. 7 is an enlarged view of the point B in FIG. 6;

FIG. 8 is an enlarged view of FIG. 6 at C;

FIG. 9 is a schematic front view of the liquid supply mechanism;

FIG. 10 is a rear view schematically illustrating the structure of the liquid supply mechanism.

In the drawings, the reference numbers indicate the following list of parts:

the electronic screen comprises an electronic screen body 1, a first sliding block 1-1, a shell 2, a first guide rail 2-1, a driving mechanism 3, a second guide rail 3-1, a first rotating shaft 3-2, a first gear 3-2-1, gear teeth 3-2-2, a first transmission mechanism 3-3, a first screw rod 3-3-1, a second gear 3-3-2, a second sliding block 3-3-3, a third gear 3-3-4, a second transmission mechanism 3-4, a second screw rod 3-4-1, a wheel disc 3-4-2, a fourth gear 3-4-2-1, a rotating disc 3-4-2-2, a sliding rail 3-4-2-3, a motor 3-5, a cleaning mechanism 4, a rack 4-1, a third guide rail 4-2, a cleaning mechanism 4-3, a cleaning mechanism 4-3-1 parts of a second rotating shaft, 4-3-2 parts of a sponge block, 4-3-3 parts of a telescopic rod, 4-3-4 parts of a first bevel gear, 4-4 parts of a fixed block, 4-4-1 parts of a first connecting rod, 4-4-2 parts of a second bevel gear, 4-4-3 parts of a connecting ring, 4-4-4 parts of a second connecting rod, 4-4-5 parts of a third sliding block, 4-4-6 parts of a third connecting rod, 4-4-7 parts of a fifth gear, 4-4-8 parts of a connecting rod, 4-4-9 parts of a fourth connecting rod, 5 parts of a liquid supply mechanism, 5-1 parts of a spraying mechanism, 5-1-1 parts of a fixed rod, 5-1-2 parts of a fifth connecting rod, 5-1-3 parts of a nozzle, 5-2 parts of a liquid outlet cylinder, 5-3 parts of a pressing plate, 5-3-1 parts of a sixth connecting rod, 5-2-1 parts of a liquid outlet pipe and 5-2 parts of a liquid inlet pipe.

Detailed Description

Referring to fig. 1-10, the present invention provides a technical solution: a lifting electronic screen comprises an electronic screen body 1, a shell 2, a driving mechanism 3, a cleaning mechanism 4 and a liquid supply mechanism 5; the electronic screen body 1 is vertically connected with the shell 2 in a sliding mode, the driving mechanism 3 is installed in the shell 2, the cleaning mechanism 4 is installed on the left side of the driving mechanism 3, the liquid supply mechanism 5 is fixedly installed on the cleaning mechanism 4, and the driving mechanism 3 is in transmission connection with the electronic screen body 1; the driving mechanism 3 is used for driving the electronic screen body 1 to move at a uniform speed and driving the cleaning mechanism 4 to move intermittently.

When the electronic screen body 1 is put into the shell 2, the driving mechanism 3 drives the electronic screen body 1 to move downwards at a constant speed relative to the shell 2, and in the downwards moving process after the electronic screen body 1 moves downwards for a distance, the cleaning mechanism 4 and the liquid supply mechanism 5 are static relative to the shell 2, namely the distance is also the distance for the electronic screen body 1 to move downwards relative to the cleaning mechanism 4, the liquid supply mechanism 5 sprays cleaning liquid to the cleaning part of the cleaning mechanism 4, the cleaning mechanism 4 synchronously moves downwards at a constant speed with the electronic screen body 1, cleans the plane of the part of the electronic screen body 1 moving downwards at a distance relative to the cleaning mechanism 4, then the cleaning mechanism 4 is changed to be static relative to the shell 2 again, and the processes are circulated until the screen surface of the electronic screen body 1 is completely cleaned by the cleaning mechanism 4.

Finally, when the electronic screen body 1 is lifted from the shell 2 for use, the driving mechanism 3 moves the cleaning mechanism 4 to move the electronic screen body 1 up synchronously at a constant speed, and meanwhile, the cleaning mechanism 4 cleans the electronic screen body 1; then the electronic screen body 1 independently moves upwards at a constant speed, but in the process, the liquid supply mechanism 5 does not spray cleaning liquid to the cleaning part of the cleaning mechanism 4 any more; then, repeating this process until the electronic screen body 1 is completely lifted from the housing 2, the electronic screen body 1 is completely lifted from the housing 2 by a movement completely opposite to the movement in which the electronic screen body 1 is received in the housing 2. It should be noted that, during the lifting process, the liquid supply mechanism 5 does not spray cleaning liquid onto the cleaning portion of the cleaning mechanism 4.

Conventional electronic screen body 1 clearance mode, many pass through the cleaning part after spraying the cleaning solution, it clears up to the other end by electronic screen body 1 one end is direct to slide, this kind of mode, the cleaning solution on the cleaning part is if will satisfy the cleaning solution quantity in the whole cleaning process, it is inevitable, electronic screen body 1 can produce residual cleaning solution on the first abluent one end screen, even there is the cleaning solution to drip to casing 2 in by the screen, and then when the cleaning solution is extravagant, because electronic screen body 1 is taken in behind airtight casing 2 if in-process that electronic screen body 1 rises casing 2, wash, at first also can't avoid the cleaning solution to drip to casing 2 in by the screen, secondly, electronic screen body 1 is after casing 2 uses, for some stubborn stains, along with the time grow, its clearance degree of difficulty can increase with it, and the in-process that electronic screen body 1 rises casing 2, wash, along with the time of electronic screen body 1 at casing 2 becomes for a long time, the cleaning degree of difficulty on electronic screen body 1 is greatly increased, because of the sealed reason of casing 2 easily takes place. Residual cleaning liquid is not easy to be discharged out of the shell 2, so that the humidity inside the shell 2 is improved, the electronic screen body 1 is stored in a higher humidity environment, and further, the service life of the electronic screen body 1 is shortened; in order to prevent the screen surface from having residual cleaning liquid and reduce the spraying amount of the cleaning liquid, the cleaning effect is poor and the cleaning is not clean due to the lack of the cleaning liquid at the end of the cleaning of the electronic screen body 1; it is difficult to achieve balance between the two.

According to the invention, the cleaning solution is sprayed by driving the cleaning mechanism 4 to intermittently move relative to the electronic screen body 1, when the cleaning mechanism 4 relatively moves relative to the electronic screen body 1, and when the cleaning mechanism is relatively static, the electronic screen body 1 is cleaned, a little cleaning solution is sprayed, and a part of screen surface is cleaned, so that the cleaning solution sprayed each time just meets the cleaning of the screen surface, and meanwhile, no cleaning solution residue is generated, meanwhile, in the process, the income process of the electronic screen body 1 is not influenced, the electronic screen body 1 always keeps downward linear motion at a constant speed relative to the shell 2, on the premise of not reducing other functions of the lifting electronic screen body, the use amount of the cleaning solution is saved, and meanwhile, a good storage environment is provided for the electronic screen body 1.

As a further scheme of the invention, as a further scheme of the invention, the driving mechanism 3 comprises a first transmission mechanism 3-3 and a second transmission mechanism 3-4, the first transmission mechanism 601 comprises a first screw rod 3-3-1, the lower end of the first screw rod 3-3-1 is fixedly connected with a third gear 3-3-4, a second sliding block 3-3-3 is connected to the first screw rod 3-3-1 in a threaded manner, the upper end of the first screw rod 3-3-1 is vertically connected with a second gear 3-3-2 in a sliding manner, and the second gear 3-3-2 is rotatably installed on the top surface of the second sliding block 3-3-3.

A second transmission mechanism 3-4 is arranged below the third gear 3-3-4, the second transmission mechanism 3-4 comprises a second screw rod 3-4-1, the top end of the second screw rod 3-4-1 is in threaded connection with a wheel disc 3-4-2, the wheel disc 3-4-2 comprises a rotary disc 3-4-2-2, a sliding rail 3-4-2-3 is arranged on the rotary disc 3-4-2-2, the third gear 3-3-4 is in sliding connection with the sliding rail 3-4-2-3, a fourth gear 3-4-2-1 is fixedly connected to the upper end of the rotary disc 3-4-2-2, and the fourth gear 3-4-2-1 is meshed with the third gear 3-3-4; the lower end of the second screw rod 3-4-1 is connected with a motor 3-5 in a transmission manner, and the motor 3-5 is fixedly connected with the shell 2.

A second guide rail 3-1 is fixedly installed on the inner wall of the right side of the shell 2, the second sliding block 3-3-3 is vertically connected with the second guide rail 3-1 in a sliding manner, a first guide rail 2-1 is fixedly installed on the inner wall of the left side of the shell 2, a first sliding block 1-1 is connected in the first guide rail 2-1 in a sliding manner, and the first sliding block 1-1 and the second sliding block 3-3-3 are respectively fixedly connected with the bottoms of the left side wall and the right side wall of the electronic screen body 1; a first rotating shaft 3-2 is vertically arranged on the second guide rail 3-1, a plurality of gear teeth 3-2-2 with equal intervals are vertically arranged on the first rotating shaft 3-2, and the gear teeth 3-2-2 are positioned below the second gear 3-3-2 and can be meshed with the gear teeth 3-3-2.

The maximum static friction force of the threaded connection between the first screw rod 3-3-1 and the second sliding block 3-3-3 is far less than the maximum static friction force of the threaded connection between the second screw rod 3-4-1 and the wheel disc 3-4-2; the transmission ratio from the motor 3-5 to the second sliding block 3-3-3 is the same as the transmission ratio from the motor 3-5 to the wheel disc 3-4-2.

When the automatic transmission device works, the motor 3-5 drives the second screw rod 3-4-1 to rotate, and at the moment, the second screw rod 3-4-1 drives the wheel disc 3-4-2 to rotate or rotate relative to the wheel disc 3-4-2.

If the second screw rod 3-4-1 drives the wheel disc 3-4-2 to rotate, the fourth gear 3-4-2-1 on the wheel disc 3-4-2 drives the first screw rod 3-3-1 to rotate through the third gear 3-3-4, the same first screw rod 3-3-1 drives the second slide block 3-3-3 to rotate or rotate relative to the second slide block 3-3-3, and the second slide block 3-3-3 can only rotate relative to the second slide block 3-3-3 because the second slide block 3-3-3 is vertically and slidably connected with the second guide rail 3-1, so that the second slide block 3-3-3 can not rotate, and further, the first screw rod 3-3-1 drives the second slide block 3-3-3 to slide downwards in a thread transmission manner; further, the electronic screen body 1 fixedly connected with the second sliding block 3-3-3 slides downwards, and the cleaning mechanism 4 arranged on the second gear 3-3-2 cannot generate displacement.

If the second screw rod 3-4-1 rotates relative to the wheel disc 3-4-2, the second screw rod 3-4-1 drives the wheel disc 3-4-2 to slide downwards in a screw thread transmission mode, and the first transmission mechanism 3-3 and the third gear 3-4 which are connected with the slide rail 3-4-2-3 in the wheel disc 3-4-2 in a sliding mode are part of the first transmission mechanism 3-3, so that the third gear 3-3-4 is connected with the slide rail 3-4-2-3 in a sliding mode, and the first transmission mechanism 3-3 and the slide rail 3-4-2-3 are connected in a sliding mode and slide downwards along with the wheel disc 3-4-2, and further the second sliding block 3-3-3 and the second gear 3-3-2 move downwards along with the second sliding block, so that the electronic screen body 1 and the cleaning mechanism 4 are driven to move downwards simultaneously.

As shown in fig. 5, when the second lead screw 3-4-1 rotates, the friction force generated between the second lead screw 3-4-1 and the wheel disc 3-4-2 is set as a first friction force, and it is obvious that the magnitude of the first friction force is proportional to the interaction force between the fourth gear 3-4-2-1 and the third gear 3-3-4, which makes the first lead screw 3-3-1 have a rotation tendency, and further makes the first lead screw 3-3-1 have a rotation tendency relative to the second slide block 3-3-3, and further makes the friction force generated between the first lead screw 3-3-1 and the second slide block 3-3-3 set as a second friction force; the maximum static friction force of the threaded connection between the first screw rod 3-3-1 and the second slide block 3-3-3 is far smaller than the maximum static friction force of the threaded connection between the second screw rod 3-4-1 and the wheel disc 3-4-2, so when the first transmission mechanism 3-3 and the second transmission mechanism 3-4 are in a free state, the second friction force can overcome the maximum static friction force of the threaded connection between the first screw rod 3-3-1 and the second slide block 3-3-3-3 preferentially, meanwhile, the interaction force between the fourth gear 3-4-2-1 and the third gear 3-3-4 can not enable the first friction force to overcome the maximum static friction force of the threaded connection between the second screw rod 3-4-1 and the wheel disc 3-4-2, therefore, in summary, the wheel disc 3-4-2 drives the first screw rod 3-3-1 to rotate, further, the second slide block 3-3 drives the electronic screen body 1 to slide downwards, and the cleaning mechanism 4 cannot generate displacement.

With the downward sliding of the second sliding block 3-3-3, the second gear 3-3-2 sliding downwards moves to the gear tooth 3-2-2 of the first rotating shaft 3-2 and is meshed with the gear tooth 3-2-2, and the gear tooth 3-2-2 limits the second gear 3-3-2 to make the second gear 3-3-2 incapable of rotating because the gear tooth 3-2-2 is incapable of rotating, and further, the second gear 3-3-2 makes the first screw rod 3-3-1 incapable of rotating; at the moment, the whole first transmission mechanism 3-3 is changed into a fixing piece which can only slide up and down along the second guide rail 3-1, further, the interaction force between the fourth gear 3-4-2-1 and the third gear 3-3-4 can enable the first friction force to overcome the maximum static friction force of threaded connection between the second screw rod 3-4-1 and the wheel disc 3-4-2, the second screw rod 3-4-1 rotates relative to the wheel disc 3-4-2, further, the second sliding block 3-3-3 and the second gear 3-3-2 move downwards along with the first friction force, further the electronic screen body 1 and the cleaning mechanism 4 are driven to simultaneously move downwards until the second sliding block 3-3-3 passes through the wheel teeth 3-2-2, the equipment restores the second sliding block 3-3 to drive the electronic screen body 1 to slide downwards, and the cleaning mechanism 4 cannot generate displacement; therefore, the second sliding block 3-3-3 intermittently passes through the gear teeth 3-2-2 in the process of moving downwards along with the driving mechanism 3, so that the second sliding block 3-3-3 is always kept moving downwards, and the cleaning mechanism 4 intermittently moves downwards.

The invention utilizes two pairs of screw rod transmission parts to be connected with each other for transmission, and realizes a mode that when a nut component in one pair of screw rod transmission parts is fixed, the other pair of screw rod transmission parts moves, and realizes the gapless fit movement of the two transmission parts, so that an electronic screen body 1 moves at a constant speed, a cleaning mechanism 4 moves intermittently, in the two transmission parts, the upper transmission part only controls the electronic screen body to move, and the lower transmission part controls the electronic screen body 1 and the cleaning mechanism 4 to move, when the transmission of the two transmission parts is switched without gaps, the electronic screen body 1 moves at a constant speed, and simultaneously the cleaning mechanism 4 moves intermittently by taking the single movement path of the two transmission parts as the amplitude, further, when the cleaning mechanism 4 is static each time, the displacement relative to the electronic screen body 1 is fixed, so as to ensure that the electronic screen body 1 moves at a constant speed, when the cleaning mechanism 4 moves, the electronic screen body 1 and the cleaning mechanism 4 are usually controlled to move independently, and then the electronic elements are correlated, and a motion error can occur in the mode, so that the relative preset relative displacement between the electronic screen body 1 and the cleaning mechanism 4 can not be misplaced and matched completely, and the cleaning mechanism can not move like: the displacement of the cleaning mechanism 4 is smaller than a preset value, and after the cleaning mechanism 4 is used for multiple times, the cleaning mechanism 4 is positioned below an initial position at the cleaning starting stage, so that the upper end part of the electronic screen body 1 cannot be cleaned; correspondingly, in the mechanical transmission link, the motion between the electronic screen body 1 and the cleaning mechanism 4 is in relevant fit through the mechanical structure, so that the electronic screen body 1 and the cleaning mechanism 4 are prevented from being in fit dislocation, the whole plane of the electronic screen body 1 can be cleaned, and the cleaning effect of the equipment is improved.

As a further scheme of the invention, the gear teeth 3-2-2 are elastic telescopic pieces which can elastically contract in the vertical direction.

When the gear 3-3-2 is about to move downwards to the gear 3-2-2, if the gear 3-2-2 is not vertically opposite to the gear gap of the second gear 3-3-2, the second gear 3-3-2 can press the gear 3-2-2 downwards to make the gear 3-2-2 shrink downwards, and when the gear 3-3-2 rotates to the gear gap where the gear 3-2-2 is vertically opposite to the second gear 3-3-2, the gear 3-2-2 extends upwards and is clamped into the gear gap of the second gear 3-3-2 under the action of the elastic member of the gear 3-2-2, so that the second gear 3-3-2 stops rotating.

By means of the elastic contractible property of the gear teeth 3-2-2, when the gap between the gear teeth 3-2-2 and the second gear 3-3-2 are not vertically aligned, the second gear 3-3-2 continuously moves downwards to avoid crushing the gear teeth 3-2-2, further, equipment damage is prevented, and stability of the equipment is improved.

As a further scheme of the invention, the cleaning mechanism 4 comprises a fixed block 4-4, a second connecting rod 4-4 is fixedly connected to the side wall of the fixed block 4-4, the second connecting rod 4-4 is rotatably connected with the upper end of a first screw rod 3-3-1, a wiping mechanism 4-3 is horizontally arranged on the fixed block 4-4 in a penetrating manner, the wiping mechanism 4-3 comprises a second rotating shaft 4-3-1, the second rotating shaft 4-3-1 penetrates and is movably arranged on the fixed block 4-4, a third sliding block 4-4-5 is horizontally and movably arranged at the left end of the second rotating shaft 4-3-1, a third guide rail 4-2 and a rack 4-1 are vertically arranged on the inner wall of the left side of the shell 2, and the third sliding block 4-4-5 is slidably connected with the third guide rail 4-2; the outer wall of the second rotating shaft 4-3-1 is fixedly connected with a plurality of sponge blocks 4-3-2 which are distributed at equal intervals and located between the third sliding block 4-4-5 and the fixed block 4-4, the side wall of the third sliding block 4-4-5 is fixedly connected with a third connecting rod 4-4-6, the second rotating shaft 4-3-1 is rotatably connected with a fourth connecting rod 4-4-9, the third connecting rod 4-4-6 is rotatably connected with a fifth gear 4-4-7, the fifth gear 4-4-7 is meshed with the rack 4-1, the end face of the fifth gear 4-4-7 is rotatably provided with a connecting rod 4-4-8, and the other end of the connecting rod 4-4-8 is rotatably connected with the fourth connecting rod 4-4-9.

When the electronic screen cleaning device works, firstly, the first transmission mechanism 3-3 in the driving mechanism 3 is used for transmission, the electronic screen body 1 descends, the cleaning mechanism 4 is not moved, meanwhile, the liquid supply mechanism 5 sprays cleaning liquid on the sponge block 4-3-2 in the cleaning mechanism 4, then, the driving mechanism 3 is switched to the second transmission mechanism 3-4 for transmission, the electronic screen body 1 descends, the first screw rod 3-3-1 drives the cleaning mechanism 4 to descend, and at the moment, the cleaning mechanism 4 drives the fifth gear 4-4-7 to descend in the descending process; in the descending process of the fifth gear 4-4-7, under the action of the rack 4-1 meshed with the fifth gear, the fifth gear 4-4-7 rotates, then the fifth gear 4-4-7 drives the fourth connecting rod 4-4-9 to reciprocate in the horizontal direction through the connecting rod 4-4-8 by the connecting rod driving principle, and further the fourth connecting rod 4-4-9 drives the wiping mechanism 4-3 to reciprocate in the horizontal direction, so that the sponge block 4-3-2 on the wiping mechanism 4-3 cleans the screen surface of the electronic screen body 1.

The cleaning mechanism 4 is driven by the matching of the pure mechanical structure to clean the cleaning mechanism 4 when the cleaning mechanism 4 and the electronic screen body 1 are relatively static, so that the problem that the cleaning effect of the electronic screen body 1 is poor due to insufficient cleaning time of the cleaning mechanism 4 when the cleaning mechanism 4 and the electronic screen body 1 are relatively static caused by errors in conventional electronic control is solved; furthermore, the cleaning of the invention is more stable and efficient.

As a further scheme of the invention, the first rotating shaft 3-2 is rotationally connected with the second guide rail 3-1 through a torsion spring, the rotating angle is fixed, a first gear 3-2-1 is arranged on the side wall of part of the first rotating shaft 3-2, and the first gear 3-2-1 is a part of the arc-shaped surface of a complete first gear section; the right end of the second rotating shaft 4-3-1 is fixedly connected with a telescopic rod 4-3-3, the right end of the telescopic rod 4-3-3 is fixedly connected with a first bevel gear 4-3-4, the fixed block 4-4 is fixedly connected with a first connecting rod 4-4-1, the first connecting rod 4-4-1 is rotatably connected with a second bevel gear 4-4-2, and the second bevel gear 4-4-2 is respectively meshed with the first bevel gear 4-3-4 and the first gear 3-2-1.

When the cleaning mechanism 4 does not move downwards in operation, namely the gear teeth 3-2-2 are not engaged with the second gear 3-3-2, the cleaning surface of the sponge block 4-3-2 is upward as shown in fig. 6, and the liquid supply mechanism 5 sprays cleaning liquid onto the cleaning surface; and then when the cleaning mechanism 4 moves downwards, namely the gear teeth 3-2-2 are meshed with the second gear 3-3-2, the first rotating shaft 3-2 is driven by the gear teeth 3-2-2 to rotate by a fixed angle and the first rotating shaft 3-2 is fixed in rotating angle by the second gear 3-3-2, then the first rotating shaft 3-2 is static and limits the second gear 3-3-2 to stop rotating, in the process, the first gear 3-2-1 on the first rotating shaft 3-2 drives the first bevel gear 4-3-4 to rotate through the second bevel gear 4-4-2, and further drives the wiping mechanism 4-3 to rotate, so that the cleaning surface of the sponge block 4-3-2 faces and is tightly attached to the screen surface of the electronic screen body 1.

When the cleaning liquid is added to the cleaning mechanism 4, the cleaning surface of the sponge block 4-3-2 faces upwards to the liquid supply mechanism 5, and the cleaning liquid is directly sprayed on the cleaning surface of the sponge block 4-3-2, so that the cleaning liquid can be more directly applied to the electronic screen body 1 when the cleaning mechanism 4 works, and the cleaning effect is further enhanced.

As a further aspect of the present invention, a scraper is fixedly installed at the lower end of the cleaning mechanism 4, and the electronic screen body 1 is in close contact with the scraper when passing through the scraper.

When the electronic screen body 1 scraper blade works, the screen surface of the electronic screen body 1 is in close contact with the scraper blade, so that the scraper blade can scrape the screen surface once, and further, foams or washing marks possibly generated in the cleaning process on the screen surface are removed.

The scraping of the scraping plate to the screen surface removes foams or washing marks possibly generated in the cleaning process, and further improves the cleaning quality of the electronic screen body 1 by the equipment.

As a further scheme of the invention, the liquid supply mechanism 5 comprises a spraying mechanism 5-1, the spraying mechanism 5-1 is installed above the wiping mechanism 4-3, the spraying mechanism 5-1 comprises a fixed rod 5-1-1, the fixed rod 5-1-1 is fixedly connected with a fifth connecting rod 5-1-2, the fifth connecting rod 5-1-2 is fixedly connected to the upper end of the fixed block 4-4, and the lower end of the fifth connecting rod 5-1-2 is fixedly provided with a spray head 5-1-3 at a position corresponding to the sponge block 4-3-2.

The liquid supply mechanism 5 further comprises a liquid outlet cylinder 5-2, the liquid outlet cylinder 5-2 is fixedly connected with a third sliding block 4-4-5, a pressing plate 5-3 is vertically and slidably mounted on the liquid outlet cylinder 5-2, the liquid outlet cylinder 5-2 and the pressing plate 5-3 jointly form a closed container, a sixth connecting rod 5-3-1 is fixedly connected to the upper end of the pressing plate 5-3, the sixth connecting rod 5-3-1 is fixedly connected with the first sliding block 1-1, a liquid outlet pipe 5-2-1 and a liquid inlet pipe 5-2-2 are fixedly mounted on the liquid outlet cylinder 5-2, the liquid outlet pipe 5-2-1 and the spray head 5-1-3 are both externally connected and communicated, and the liquid inlet pipe 5-2-2 is externally connected with a cleaning liquid container; the liquid outlet pipe 5-2-1 and the liquid inlet pipe 5-2-2 are both provided with one-way valves.

When the electronic screen body 1 is put into the shell 2, when the electronic screen body 1 displaces downwards relative to the cleaning mechanism 4, the pressure plate 5-3 displaces downwards relative to the liquid outlet cylinder 5-2, so that the volume of the cavity in the liquid outlet cylinder 5-2 is reduced, the cleaning liquid in the cavity is squeezed, the cleaning liquid is discharged from the spray head 5-1-3 through the liquid outlet pipe 5-2-1 and then sprayed on the sponge block 4-3-2; when the electronic screen body 1 extends out of the shell 2, the pressing plate 5-3 moves upwards relative to the liquid outlet cylinder 5-2 along with the upward displacement of the electronic screen body 1 relative to the cleaning mechanism 4, so that the volume of the cavity in the liquid outlet cylinder 5-2 is increased, and negative pressure is formed in the cavity, so that cleaning liquid is extracted from the cleaning liquid container through the liquid inlet pipe 5-2-2 and is filled into the liquid outlet cylinder 5-2, and the subsequent process of taking the electronic screen body 1 into the shell 2 is prepared for use.

Utilize simple mechanical cooperation, carry out the work of spraying of cleaning solution, make the equipment cooperation inseparabler, the working process is more stable.

As a further scheme of the invention, the upper end of the shell 2 is detachable.

The shell 2 is designed to be detachable, so that the electronic screen body and related components can be conveniently mounted and dismounted, and the equipment is more convenient and faster to use.

As a further scheme of the invention, the track grooves of the first guide rail 2-1, the second guide rail 3-1 and the third guide rail 4-2 are square.

The track groove shape of the related guide rail in the equipment is designed to be square, so that the process of mounting and separating from the track can be easily completed when the electronic screen body and the related components are mounted and dismounted, and the equipment is more convenient and faster to use.

As a further scheme of the invention, the surface of the scraper which can be contacted with the electronic screen body 1 is made of flexible water-absorbing material.

The contact surface of the scraper and the electronic screen body 1 is made of flexible water-absorbing materials, so that the electronic screen body 1 is better protected, and the scraper is prevented from damaging the screen surface of the electronic screen body 1.

According to the invention, the cleaning mechanism is driven to move intermittently relative to the electronic screen body, when the cleaning mechanism moves relative to the electronic screen body, cleaning solution is sprayed, when the cleaning mechanism is relatively static, the electronic screen body is cleaned, a little cleaning solution is sprayed, and a part of screen surface is cleaned, so that the cleaning solution sprayed each time just meets the cleaning of the screen surface, and meanwhile, no cleaning solution residue is generated.

The invention utilizes two pairs of screw rod transmission parts to be connected with each other for transmission, and realizes the mode that when a nut component in one pair of screw rod transmission parts is fixed, the other pair of screw rod transmission parts moves, and realizes the gapless fit movement of the two transmission parts, so that an electronic screen body moves at a uniform speed, a cleaning mechanism moves intermittently, in the two transmission parts, the upper transmission part only controls the electronic screen body to move, and the lower transmission part controls the electronic screen body and the cleaning mechanism to move, when the transmission of the two transmission parts is switched to have no gap, the electronic screen body moves at a uniform speed, and simultaneously, the cleaning mechanism moves intermittently by taking the single movement path of the two transmission parts as the amplitude, further, when the cleaning mechanism is static each time, the displacement relative to the electronic screen body is fixed, so that the traditional transmission part electronic screen body moves at a uniform speed, and the cleaning mechanism usually controls the electronic screen body and the cleaning mechanism to move independently, and is related by an electronic element, the mode can generate movement errors, and the relative preset relative displacement between the electronic screen body and the cleaning mechanism can not be misplaced after long-term use, so that the matched movement between the electronic screen body and the cleaning mechanism can not be misplaced completely as: the displacement of the cleaning mechanism is smaller than a preset value, and after the cleaning mechanism is used for many times, the cleaning mechanism is positioned below an initial position in the cleaning starting stage, so that the upper end part of the electronic screen body cannot be cleaned; correspondingly, in the mechanical transmission link, the motion between the electronic screen body and the cleaning mechanism is in relevant fit through the mechanical structure, so that the electronic screen body and the cleaning mechanism are prevented from being matched and dislocated, the whole plane of the electronic screen body can be cleaned, and the cleaning effect of equipment is improved.

According to the invention, through the elastic contractibility property of the gear teeth, when the tooth gap of the gear teeth and the second gear are not vertically aligned, the second gear continuously moves downwards to avoid crushing the gear teeth, further, the equipment is prevented from being damaged, and the stability of the equipment is improved.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims

1. A lifting electronic screen is characterized by comprising an electronic screen body (1), a shell (2), a driving mechanism (3), a cleaning mechanism (4) and a liquid supply mechanism (5); the electronic screen body (1) is vertically and slidably connected with the shell (2), the driving mechanism (3) is installed in the shell (2), the cleaning mechanism (4) is installed on the left side of the driving mechanism (3), the liquid supply mechanism (5) is fixedly installed on the cleaning mechanism (4), and the driving mechanism (3) is in transmission connection with the electronic screen body (1); the driving mechanism (3) is used for driving the electronic screen body (1) to move at a uniform speed and driving the cleaning mechanism (4) to move intermittently;

the driving mechanism (3) comprises a first transmission mechanism (3-3), the first transmission mechanism (3-3) comprises a first screw rod (3-3-1), the lower end of the first screw rod (3-3-1) is fixedly connected with a third gear (3-3-4), a second sliding block (3-3-3) is in threaded connection with the first screw rod (3-3-1), the upper end of the first screw rod (3-3-1) is vertically and slidably connected with a second gear (3-3-2), and the second gear (3-3-2) is rotatably installed on the top surface of the second sliding block (3-3-3);

a second transmission mechanism (3-4) is arranged below the third gear (3-3-4), the second transmission mechanism (3-4) comprises a second screw rod (3-4-1), the top end of the second screw rod (3-4-1) is in threaded connection with a wheel disc (3-4-2), the wheel disc (3-4-2) comprises a rotary disc (3-4-2-2), a sliding rail (3-4-2-3) is arranged on the rotary disc (3-4-2-2), the third gear (3-3-4) is in sliding connection with the sliding rail (3-4-2-3), a fourth gear (3-4-2-1) is fixedly connected to the upper end of the rotary disc (3-4-2-2), and the fourth gear (3-4-2-1) is meshed with the third gear (3-3-4); the lower end of the second screw rod (3-4-1) is connected with a motor (3-5) in a transmission manner, and the motor (3-5) is fixedly connected with the shell (2);

a second guide rail (3-1) is fixedly installed on the inner wall of the right side of the shell (2), the second sliding block (3-3-3) is vertically and slidably connected with the second guide rail (3-1), a first guide rail (2-1) is fixedly installed on the inner wall of the left side of the shell (2), a first sliding block (1-1) is slidably connected in the first guide rail (2-1), and the first sliding block (1-1) and the second sliding block (3-3-3) are respectively and fixedly connected with the bottoms of the left side wall and the right side wall of the electronic screen body (1); a first rotating shaft (3-2) is vertically arranged on the second guide rail (3-1), a plurality of gear teeth (3-2-2) which are distributed at equal intervals are vertically arranged on the first rotating shaft (3-2), and the gear teeth (3-2-2) are positioned below the second gear (3-3-2) and meshed with the second gear (3-3-2);

the maximum static friction force of the threaded connection between the first screw rod (3-3-1) and the second slide block (3-3-3) is far smaller than the maximum static friction force of the threaded connection between the second screw rod (3-4-1) and the wheel disc (3-4-2), so that when the first transmission mechanism (3-3) and the second transmission mechanism (3-4) are in a free state, the second friction force can overcome the maximum static friction force of the threaded connection between the first screw rod (3-3-1) and the second slide block (3-3-3) preferentially, wherein the second friction force is the friction force generated between the first screw rod (3-3-1) and the second slide block (3-3-3);

when the automatic transmission mechanism works, the motor (3-5) drives the second screw rod (3-4-1) to rotate, and the second screw rod (3-4-1) drives the wheel disc (3-4-2) to rotate or rotate relative to the wheel disc (3-4-2);

when the second screw rod (3-4-1) drives the wheel disc (3-4-2) to rotate, the second sliding block (3-3-3) drives the electronic screen body (1) to slide downwards, and the cleaning mechanism (4) cannot generate displacement;

when the second gear (3-3-2) sliding downwards is meshed with the gear teeth (3-2-2), the second screw rod (3-4-1) rotates relative to the wheel disc (3-4-2), the second sliding block (3-3-3) and the second gear (3-3-2) move downwards along with the second screw rod, the electronic screen body (1) and the cleaning mechanism (4) are driven to move downwards simultaneously, and the cleaning mechanism (4) performs screen surface cleaning on the electronic screen body (1) in the descending process.

2. The elevating electronic screen as recited in claim 1, wherein: the gear teeth (3-2-2) are elastic telescopic pieces and can elastically contract in the vertical direction.

3. The elevating electronic screen as claimed in claim 1, wherein: the cleaning mechanism (4) comprises a fixed block (4-4), a second connecting rod (4-4-4) is fixedly connected to the side wall of the fixed block (4-4), the second connecting rod (4-4-4) is rotatably connected with the upper end of a first screw rod (3-3-1), a wiping mechanism (4-3) is horizontally arranged on the fixed block (4-4) in a penetrating mode, the wiping mechanism (4-3) comprises a second rotating shaft (4-3-1), the second rotating shaft (4-3-1) penetrates through and is movably mounted on the fixed block (4-4), a third sliding block (4-4-5) is horizontally movably mounted at the left end of the second rotating shaft (4-3-1), a third guide rail (4-2) and a rack (4-1) are vertically mounted on the inner wall of the left side of the shell (2), and the third sliding block (4-4-5) is slidably connected with the third guide rail (4-2); fixedly connected with is a plurality of sponge pieces (4-3-2) that are the equidistance and distribute and lie in between third slider (4-4-5) and fixed block (4-4) on the outer wall of second pivot (4-3-1), fixedly connected with third connecting rod (4-4-6) on third slider (4-4-5) lateral wall, it has fourth connecting rod (4-4-9) to rotate on second pivot (4-3-1), the front end of third connecting rod (4-4-6) rotates and is connected with fifth gear (4-4-7), fifth gear (4-4-7) and rack (4-1) meshing, connecting rod (4-4-8) are installed in fifth gear (4-4-7) terminal surface rotation, the connecting rod (4-4-8) other end rotates with fourth connecting rod (4-4-9) and is connected.

4. A lifting electronic screen as claimed in claim 3, wherein: the first rotating shaft (3-2) is rotationally connected with the second guide rail (3-1) through a torsion spring, the rotating angle is fixed, a first gear (3-2-1) is arranged on the partial side wall of the first rotating shaft (3-2), and the first gear (3-2-1) is a part of the arc-shaped surface of a complete first gear section; the right end of the second rotating shaft (4-3-1) is fixedly connected with a telescopic rod (4-3-3), the right end of the telescopic rod (4-3-3) is fixedly connected with a first bevel gear (4-3-4), the fixed block (4-4) is fixedly connected with a first connecting rod (4-4-1), the first connecting rod (4-4-1) is rotatably connected with a second bevel gear (4-4-2), and the second bevel gear (4-4-2) is respectively meshed with the first bevel gear (4-3-4) and the first gear (3-2-1).

5. A lifting electronic screen as claimed in claim 3, wherein: the lower end of the cleaning mechanism (4) is fixedly provided with a scraper, and the electronic screen body (1) can be in close contact with the scraper when passing through the scraper.

6. A lift electronic screen of claim 4, characterized in that: the liquid supply mechanism (5) comprises a spraying mechanism (5-1), the spraying mechanism (5-1) is installed above the wiping mechanism (4-3), the spraying mechanism (5-1) comprises a fixing rod (5-1-1), the fixing rod (5-1-1) is fixedly connected with a fifth connecting rod (5-1-2), the fifth connecting rod (5-1-2) is fixedly connected to the upper end of the fixing block (4-4), and the lower end of the fifth connecting rod (5-1-2) is fixedly provided with a spray head (5-1-3) at a position corresponding to the sponge block (4-3-2);

the liquid supply mechanism (5) further comprises a liquid outlet cylinder (5-2), the liquid outlet cylinder (5-2) is fixedly connected with a third sliding block (4-4-5), a pressing plate (5-3) is vertically and slidably mounted on the liquid outlet cylinder (5-2), the liquid outlet cylinder (5-2) and the pressing plate (5-3) jointly form a closed container, a sixth connecting rod (5-3-1) is fixedly connected to the upper end of the pressing plate (5-3), the sixth connecting rod (5-3-1) is fixedly connected with the first sliding block (1-1), a liquid outlet pipe (5-2-1) and a liquid inlet pipe (5-2-2) are fixedly mounted on the liquid outlet cylinder (5-2), the liquid outlet pipe (5-2-1) and the spray head (5-1-3) are both externally connected with a communicating pipe and communicated with a cleaning liquid container, and the liquid inlet pipe (5-2-2) is externally connected with a cleaning liquid container; one-way valves are arranged in the liquid outlet pipe (5-2-1) and the liquid inlet pipe (5-2-2).

7. A lift electronic screen of claim 4, characterized in that: the upper end of the shell (2) is detachable.

8. The elevating electronic screen as recited in claim 7, wherein: the track grooves of the first guide rail (2-1), the second guide rail (3-1) and the third guide rail (4-2) are square.

9. A lift electronic screen of claim 5, characterized in that: the surface of the scraper plate, which can be in contact with the electronic screen body (1), is made of a flexible water-absorbing material.