Information presentation device

Abstract

The present invention provides an information presentation device, belonging to the technical field of stage information presentation props, comprising a suitcase, wherein a multi-section electric telescopic rod is fixedly mounted on the left side wall of the inner cavity of the suitcase, a display screen is fixedly mounted on the piston rod end of the multi-section electric telescopic rod, a cleaning roller is attached to the side wall of the display screen, a cleaning assembly for changing the position of the cleaning roller is provided in the middle of the inner cavity of the suitcase, a spray assembly for spraying cleaning liquid onto the surface of the display screen is provided in the inner cavity of the cleaning roller, and a transmission rod is rotatably mounted in the middle of the inner side wall of the suitcase. The invention, through the cooperation of the storage assembly and the multi-section electric telescopic rod, enables the use and quick storage of the display screen, preventing the display screen from being exposed to air for a long time during storage, which would reduce the display screen's service life. The cooperation of the cleaning roller and the cleaning assembly, etc., achieves the cleaning of the display screen surface, thereby improving the user's viewing experience of information during off-site presentations.

Description

Technical Field

[0001] The present invention relates to the technical field of stage information demonstration props, in particular to an information demonstration device. Background Art

[0002] The collaborative demonstration of stage creation includes stage lighting and off-site information display devices. The off-site information display devices are a very important part of the touring stage. They are artistic creations that purposefully reproduce the design intentions to the audience in the form of visual images. The off-site information display devices in the currently known TV studios and theater stages are all decentralized and independently controlled. They are centrally directed by the director and are placed to improve the performance effect of the indoor stage.

[0003] However, in actual use, the existing information presentation devices for touring performances usually use a support frame to place a display screen for off-site display of upcoming performers and performance items. However, due to the high mobility of the stage, the existing display screen and support frame are generally independent structures, both of which are inconvenient to carry. At the same time, the display screen is often exposed when stored. The surface of the display screen that has not been used for a long time is prone to dust accumulation, affecting the user's viewing experience during subsequent use. At the same time, with the accumulation of dust, dust can easily enter the interior of the display screen through the heat dissipation holes of the display screen, causing damage to electronic components, thereby affecting the service life of the display screen. Therefore, how to invent an information presentation device to improve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] In order to make up for the above deficiencies, the present invention provides an information presentation device, which aims to improve the problems raised in the above background technology.

[0005] The present invention is achieved in that:

[0006] The present invention provides an information presentation device, comprising a suitcase and a handle fixedly mounted on the right end surface of the suitcase, wherein a sliding wheel is provided on the lower end surface of the suitcase, and storage components for adjusting the height of the sliding wheel are provided on the front and rear sides of the inner cavity side wall of the suitcase, a multi-section electric telescopic rod is fixedly mounted on the left side wall of the inner cavity of the suitcase, a display screen is fixedly mounted on the piston rod end of the multi-section electric telescopic rod, a power input port and a USB socket are provided on the right end surface of the display screen, a cleaning roller is attached to the side wall of the display screen, a cleaning component for changing the position of the cleaning roller is provided in the middle part of the inner cavity of the suitcase, a spray component for spraying cleaning liquid onto the surface of the display screen is provided in the inner cavity of the cleaning roller, and a transmission rod is rotatably mounted in the middle part of the inner side wall of the suitcase.

[0007] Preferably, the storage assembly includes a fixing ear fixedly mounted on the upper part of the inner wall of the suitcase, and a connecting plate rotatably mounted in the inner cavity of the fixing ear, a supporting ear being rotatably mounted on one end of the connecting plate away from the fixing ear, the sliding wheel being fixedly mounted on the lower end surface of the supporting ear, and the supporting ear sliding on the lower end surface of the suitcase.

[0008] By adopting the above technical solution, the sliding wheel can be released and stored, thereby improving the convenience of the entire device.

[0009] Preferably, the storage assembly also includes a bidirectional threaded rod arranged in the inner cavity of the suitcase, and connecting sleeves are threadedly installed on the left and right sides of the side walls of the bidirectional threaded rod. The left and right sides of the bidirectional threaded rod have opposite thread directions, and an arc-shaped groove is opened on the side wall of the connecting plate, and one end of the connecting sleeve slides in the inner cavity of the arc-shaped groove.

[0010] Preferably, a worm is fixedly mounted on the front and rear sides of the side wall of the transmission rod, a worm wheel is fixedly mounted on the middle part of the side wall of the bidirectional threaded rod, the worm wheel is meshingly connected to the worm, a rack plate is fixedly mounted on the left end face of the display screen, a gear is fixedly mounted on the middle part of the side wall of the transmission rod, and the gear is meshingly connected to the rack plate.

[0011] Preferably, the cleaning assembly includes a reciprocating threaded groove rod fixedly mounted on the front and rear sides of the side wall of the transmission rod, a movable sleeve is slidably mounted in the threaded groove wall of the reciprocating threaded groove rod, a movable seat is fixedly mounted on the upper end surface of the movable sleeve, a positioning rod is slidably mounted in the inner cavity of the movable seat, and the positioning rod is fixedly mounted on the inner cavity side wall of the suitcase.

[0012] By adopting the above technical solution, the dust on the surface of the display screen can be cleaned, ensuring a good viewing experience for users.

[0013] Preferably, the thread directions of the reciprocating thread groove rods on the front and rear sides are opposite, and the right end surface of the movable seat is fixedly connected to the cleaning roller through a connecting rod.

[0014] Preferably, the middle part of the inner cavity of the cleaning roller is hollow, and the spray assembly includes a plug slidably mounted on the side wall of the cleaning roller, a return spring is fixedly mounted on the side wall of the plug, and the other end of the return spring is fixedly mounted on the inner wall of the cleaning roller, and the end of the plug is arranged in an arc shape, and a water channel connected to the cleaning roller is provided on the plug, and a one-way water valve with an outlet to the outside is provided in the inner cavity of the water channel.

[0015] Preferably, the spray assembly also includes a water tank placed on the upper part of the inner wall of the luggage compartment, and a water pipe fixedly installed between the water tank and the cleaning roller, the inner cavity of the water pipe is provided with a one-way water valve whose outlet is to the inner cavity of the cleaning roller, the plugs are distributed circumferentially and equidistantly on the cleaning roller, and a dry wool cloth is also provided on the side wall of the cleaning roller, and the water tank is connected to the outside world.

[0016] By adopting the above technical solution, cleaning liquid can be sprayed onto the surface of the display screen to improve the cleaning effect of the entire device.

[0017] The beneficial effects of the present invention are:

[0018] The present invention is provided with a multi-stage electric telescopic rod, so that the display screen can be retracted after the performance and stored in the suitcase, so as to avoid the display screen being exposed to the air for a long time when stored, and dust entering the interior, which affects its service life. At the same time, a storage component is provided, and with the cooperation of the worm and worm gear, the sliding wheel can slide out of the interior of the suitcase and rest on the ground. At this time, with the cooperation of the sliding wheel, the staff can easily carry the entire equipment to improve the convenience of the entire equipment. By providing a cleaning component and a spraying component, when the display screen is used in a performance, the movable sleeve can be reciprocated on the side wall of the reciprocating thread groove rod, and the cleaning roller will also continuously roll on the end face of the display screen and continuously spray cleaning liquid onto the surface of the display screen, thereby realizing the cleaning of dust on the surface of the display screen, so as to improve the user's viewing experience of the performance information outside the venue. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of an information presentation device provided by an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of an information presentation device provided by an embodiment of the present invention when viewed from above;

[0022] Figure 3 This is a schematic diagram of a partial top view of an information presentation device provided by an embodiment of the present invention;

[0023] Figure 4 An information presentation device provided by an embodiment of the present invention Figure 3 Schematic diagram of the enlarged structure of area A in the middle;

[0024] Figure 5 An information presentation device provided by an embodiment of the present invention Figure 3 Schematic diagram of the enlarged structure of the middle B area;

[0025] Figure 6 This is a schematic diagram of a front cross-sectional structure of a suitcase of an information presentation device provided by an embodiment of the present invention;

[0026] Figure 7 It is a schematic cross-sectional view of a cleaning roller of an information presentation device provided by an embodiment of the present invention.

[0027] In the figure: 1. Luggage compartment; 11. Handle; 2. Sliding wheel; 3. Storage assembly; 31. Fixing ear; 32. Connecting plate; 321. Arc groove; 33. Support ear; 34. Bidirectional threaded rod; 35. Connecting sleeve; 36. Worm; 37. Worm gear; 38. Rack plate; 39. Gear; 4. Multi-section electric telescopic rod; 5. Display screen; 6. Cleaning roller; 61. Drying cloth; 7. Cleaning assembly; 71. Reciprocating threaded groove rod; 72. Movable sleeve; 73. Movable seat; 74. Positioning rod; 75. Connecting rod; 8. Spray assembly; 81. Plug; 811. Water channel; 82. Return spring; 83. Water tank; 84. Water pipe; 9. Transmission rod. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention. Example

[0029] Reference Figure 1-7 , an information presentation device includes a suitcase 1, and a handle 11 fixedly installed on the right end surface of the suitcase 1, a sliding wheel 2 is provided on the lower end surface of the suitcase 1, and storage components 3 for adjusting the height of the sliding wheel 2 are provided on the front and rear sides of the inner cavity side walls of the suitcase 1, a multi-section electric telescopic rod 4 is fixedly installed on the left side wall of the inner cavity of the suitcase 1, and a display screen 5 is fixedly installed on the piston rod end of the multi-section electric telescopic rod 4, and a power input port and a USB socket are provided on the right end surface of the display screen 5. A cleaning roller 6 is attached to the side wall of the display screen 5, and a cleaning component 7 for changing the position of the cleaning roller 6 is provided in the middle of the inner cavity of the suitcase 1. The inner cavity of the cleaning roller 6 is provided with a spray component 8 for spraying cleaning liquid onto the surface of the display screen 5, and a transmission rod 9 is rotatably installed in the middle of the inner side wall of the suitcase 1.

[0030] Furthermore, the storage assembly 3 includes a fixed ear 31 fixedly mounted on the upper part of the inner side wall of the luggage case 1, and a connecting plate 32 rotatably mounted on the inner cavity of the fixed ear 31, and a supporting ear 33 is rotatably mounted on the end of the connecting plate 32 away from the fixed ear 31. The sliding wheel 2 is fixedly mounted on the lower end surface of the supporting ear 33, and the supporting ear 33 slides on the lower end surface of the luggage case 1. The storage assembly 3 also includes a bidirectional threaded rod 34 set in the inner cavity of the luggage case 1, and the left and right sides of the side walls of the bidirectional threaded rod 34 are threadedly mounted with connecting sleeves 35. The left and right sides of the threaded rod 34 have opposite thread directions. An arc groove 321 is provided on the side wall of the connecting plate 32. One end of the connecting sleeve 35 slides in the inner cavity of the arc groove 321. Worm gears 36 are fixedly installed on the front and rear sides of the side wall of the transmission rod 9. A worm gear 37 is fixedly installed in the middle of the side wall of the bidirectional threaded rod 34. The worm gear 37 is meshed with the worm gear 36. A rack plate 38 is fixedly installed on the left end face of the display screen 5. A gear 39 is fixedly installed in the middle of the side wall of the transmission rod 9. The gear 39 is meshed with the rack plate 38.

[0031] It should be noted that: when the rack plate 38 drives the gear 39 to rotate the transmission rod 9, the worm 36 fixed at its end also rotates accordingly, and is meshed with the worm 36 through the worm wheel 37. The worm wheel 37 will drive the two-way threaded rod 34 to rotate, and is threadedly connected to the connecting sleeve 35 through the two-way threaded rod 34. At this time, the connecting sleeves 35 on both sides will gather inward at the same time, and the connecting sleeve 35 moves toward the lower part of the inner cavity of the arc groove 321 on the connecting plate 32. Finally, the sliding wheel 2 can slide out of the interior of the suitcase 1 and rest on the ground. At this time, the staff can easily carry the entire device by connecting the handle 11 through a rope, in conjunction with the sliding wheel 2 placed on the ground, to improve the convenience of the entire device.

[0032] The cleaning assembly 7 comprises a reciprocating threaded groove rod 71 fixedly mounted on the front and rear sides of the side wall of the transmission rod 9, a movable sleeve 72 is slidably mounted in the threaded groove wall of the reciprocating threaded groove rod 71, and a movable seat 73 is fixedly mounted on the upper end face of the movable sleeve 72. A positioning rod 74 is slidably mounted on the inner cavity of the movable seat 73, and the positioning rod 74 is fixedly mounted on the inner cavity side wall of the luggage box 1. The thread directions of the reciprocating threaded groove rods 71 ​​on the front and rear sides are opposite, and the right end face of the movable seat 73 is fixedly connected to the cleaning roller 6 through a connecting rod 75. The middle part of the inner cavity of the cleaning roller 6 is hollow. The spray assembly 8 comprises a plug 81 slidably mounted on the side wall of the cleaning roller 6. A return spring 82 is fixedly installed, and the other end of the return spring 82 is fixedly installed on the inner wall of the cleaning roller 6. The end of the plug 81 is arranged in an arc shape. A water channel 811 connected to the cleaning roller 6 is provided on the plug 81. The inner cavity of the water channel 811 is provided with a one-way water valve with an outlet to the outside. The spray assembly 8 also includes a water tank 83 placed on the upper part of the inner wall of the luggage compartment 1, and a water pipe 84 fixedly installed between the water tank 83 and the cleaning roller 6. The inner cavity of the water pipe 84 is provided with a one-way water valve with an outlet to the inner cavity of the cleaning roller 6. The plugs 81 are circumferentially equidistantly distributed on the cleaning roller 6. A dry wool cloth 61 is also provided on the side wall of the cleaning roller 6. The water tank 83 is connected to the outside.

[0033] It should be noted that: after the staff places the entire equipment outside the stage, the display screen 5 can be moved to the outside of the suitcase 1 by starting the multi-section electric telescopic rod 4. As the display screen 5 is exposed outward, the staff flips the suitcase 1 upward so that the handle 11 on the suitcase 1 is level with the ground, exposing the display screen 5 to the sight of users who are about to enter. The right end face of the display screen 5 is provided with a power input port and a USB socket, which can intuitively display the program content and information required for the performance in the user's field of view, so that the entire device can realize the operation of information demonstration; as the display screen 5 continuously drives the rack plate 38 to move to the right, the gear 39 will drive the transmission rod 9 to rotate the reciprocating thread groove rod 71 fixed on its side wall, and the movable sleeve 72 will rotate in the reciprocating thread groove The rod 71 moves back and forth on the side wall of the rod 71, and the cleaning roller 6 fixed to the movable seat 73 by the connecting rod 75 can continuously roll on the end face of the display screen 5 to clean the dust on the surface of the display screen 5, so as to enhance the user's viewing experience; when the cleaning roller 6 rolls on the end face of the display screen 5, accompanied by the continuous squeezing of the plug 81 with the side wall of the display screen 5, the plug 81 will move toward the inner cavity of the cleaning roller 6. At this time, the return spring 82 is stretched, the volume of the internal cavity of the cleaning roller 6 is reduced, and the pressure of the cleaning liquid inside the cleaning roller 6 is significantly increased, and finally it can break through the one-way water valve in the waterway 811 and be discharged to the surface of the display screen 5. In conjunction with the dry cloth 61 on the side wall of the cleaning roller 6, the dust on the surface of the display screen 5 can be better cleaned, ensuring a good viewing experience for the user.

[0034] The working principle of this information demonstration device:

[0035] After the staff has placed the entire device outside the stage, they activate the multi-section electric telescopic rod 4 to move the display screen 5 to the outside of the suitcase 1. As the display screen 5 is exposed, the staff flips the suitcase 1 upwards, making the handle 11 on the suitcase 1 level with the ground, so that the display screen 5 is exposed to the sight of users about to enter the venue. At this time, the power input port and USB socket are provided on the right end face of the display screen 5, which can intuitively display the program content and information required for the performance in the user's field of view, making the entire device realize information demonstration operation;

[0036] As the display screen 5 continuously drives the rack plate 38 to move rightward, the gear 39 will drive the transmission rod 9 to rotate the reciprocating thread groove rod 71 fixed on its side wall. Since a movable sleeve 72 is slidably installed in the thread groove wall of the reciprocating thread groove rod 71, and the movable seat 73 is constrained horizontally by the positioning rod 74, the movable sleeve 72 will reciprocate back and forth on the side wall of the reciprocating thread groove rod 71. At this time, the cleaning roller 6 fixed to the movable seat 73 by the connecting rod 75 can continuously roll on the end surface of the display screen 5 to clean the dust on the surface of the display screen 5, thereby improving the user's viewing experience;

[0037] When the cleaning roller 6 rolls on the end surface of the display screen 5, accompanied by the plug 81 constantly squeezing the side wall of the display screen 5, the plug 81 will move toward the inner cavity of the cleaning roller 6. At this time, the return spring 82 is stretched, the volume of the internal cavity of the cleaning roller 6 is reduced, and the pressure of the cleaning liquid in the cleaning roller 6 is significantly increased, and finally it can break through the one-way water valve in the water channel 811 and be discharged to the surface of the display screen 5. Cooperating with the dry wool cloth 61 on the side wall of the cleaning roller 6, it can better clean the dust on the surface of the display screen 5, ensuring a good viewing experience for the user. When the plug 81 is out of contact with the side wall of the display screen 5, under the elastic force of the return spring 82, the plug 81 will move toward the outside of the cleaning roller 6 again. At this time, the volume of the internal cavity of the cleaning roller 6 is increased, and the pressure of the cleaning liquid in the cleaning roller 6 is significantly reduced. The cleaning liquid in the water tank 83 can enter the inner cavity of the cleaning roller 6 through the water pipe 84 under the action of the external atmospheric pressure, thereby replenishing the cleaning liquid capacity;

[0038] After the performance, the staff retracts the display screen 5 by starting the multi-section electric telescopic rod 4 to prevent the display screen 5 from being exposed to the outside for a long time and being contaminated with dust, which affects its service life. At this time, with the cooperation of the cleaning component 7 and the spray component 8, the display screen 5 can be cleaned again to ensure good off-site display and use during the next performance. When the rack plate 38 drives the gear 39 to rotate the transmission rod 9, the worm 36 fixed at its end also rotates accordingly, and is meshed with the worm 36 through the worm gear 37. The worm gear 37 will drive the bidirectional threaded rod 34 to rotate, and the bidirectional threaded rod 34 is threadedly connected to the connecting sleeve 35. At this time, the connecting sleeves 35 on both sides will simultaneously gather inwardly, and the connecting sleeve 35 moves to the lower part of the inner cavity of the arc groove 321 on the connecting plate 32. Finally, the sliding wheel 2 can slide out of the interior of the suitcase 1 and rest on the ground. At this time, the staff connects the handle 11 through a rope, and cooperates with the sliding wheel 2 placed on the ground to easily carry the entire equipment to improve the convenience of the entire equipment.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0041] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An information presentation device comprising a suitcase (1) and a handle (11) fixedly mounted on the right end surface of the suitcase (1), characterized in that: The lower end surface of the suitcase (1) is provided with a sliding wheel (2), and the front and rear sides of the inner cavity side wall of the suitcase (1) are provided with a storage assembly (3) for adjusting the height of the sliding wheel (2). A multi-section electric telescopic rod (4) is fixedly installed on the left side wall of the inner cavity of the suitcase (1), and a display screen (5) is fixedly installed on the piston rod end of the multi-section electric telescopic rod (4). The right end surface of the display screen (5) is provided with a power input port and a USB socket. A cleaning roller (6) is attached to the side wall of the display screen (5). A cleaning assembly (7) for changing the position of the cleaning roller (6) is provided in the middle of the inner cavity of the suitcase (1), and a spray assembly (8) for spraying cleaning liquid onto the surface of the display screen (5) is provided in the inner cavity of the cleaning roller (6). A transmission rod (9) is rotatably installed in the middle of the inner side wall of the suitcase (1); The storage assembly (3) includes a fixed ear (31) fixedly mounted on the upper part of the inner wall of the luggage case (1), and a connecting plate (32) rotatably mounted in the inner cavity of the fixed ear (31), the end of the connecting plate (32) away from the fixed ear (31) is rotatably mounted with a supporting ear (33), the sliding wheel (2) is fixedly mounted on the lower end surface of the supporting ear (33), and the supporting ear (33) slides on the lower end surface of the luggage case (1), the storage assembly (3) also includes a bidirectional threaded rod (34) arranged in the inner cavity of the luggage case (1), the left and right sides of the side wall of the bidirectional threaded rod (34) are threadedly mounted with connecting sleeves (35), the left and right sides of the bidirectional threaded rod (34) have opposite thread directions, an arc groove (321) is opened on the side wall of the connecting plate (32), and one end of the connecting sleeve (35) slides in the inner cavity of the arc groove (321); A worm (36) is fixedly mounted on the front and rear sides of the side wall of the transmission rod (9); a worm wheel (37) is fixedly mounted on the middle of the side wall of the bidirectional threaded rod (34); the worm wheel (37) is meshedly connected with the worm (36); a rack plate (38) is fixedly mounted on the left end face of the display screen (5); a gear (39) is fixedly mounted on the middle of the side wall of the transmission rod (9); the gear (39) is meshedly connected with the rack plate (38); The cleaning assembly (7) comprises a reciprocating threaded groove rod (71) fixedly mounted on the front and rear sides of the side wall of the transmission rod (9); a movable sleeve (72) is slidably mounted in the threaded groove wall of the reciprocating threaded groove rod (71); a movable seat (73) is fixedly mounted on the upper end surface of the movable sleeve (72); a positioning rod (74) is slidably mounted in the inner cavity of the movable seat (73); the positioning rod (74) is fixedly mounted on the inner cavity side wall of the luggage box (1); the thread directions of the reciprocating threaded groove rod (71) on the front and rear sides are opposite; and the right end surface of the movable seat (73) is fixedly connected to the cleaning roller (6) via a connecting rod (75); The middle part of the inner cavity of the cleaning roller (6) is hollow, and the spray assembly (8) comprises a plug (81) slidably mounted on the side wall of the cleaning roller (6), a return spring (82) is fixedly mounted on the side wall of the plug (81), and the other end of the return spring (82) is fixedly mounted on the inner wall of the cleaning roller (6), the end of the plug (81) is arranged in an arc shape, and a water channel (811) connected to the cleaning roller (6) is provided on the plug (81), and a one-way water valve with an outlet to the outside is provided in the inner cavity of the water channel (811).

2. An information presentation device according to claim 1, characterized in that: The spray assembly (8) further comprises a water tank (83) placed on the upper portion of the inner side wall of the luggage box (1), and a water pipe (84) fixedly installed between the water tank (83) and the cleaning roller (6); the inner cavity of the water pipe (84) is provided with a one-way water valve with an outlet toward the inner cavity of the cleaning roller (6); the plugs (81) are circumferentially and equidistantly distributed on the cleaning roller (6); a dry wool cloth (61) is further provided on the side wall of the cleaning roller (6); and the water tank (83) is in communication with the outside.

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