JP2021043427A - Large self-washing signboard - Google Patents

Abstract

To provide a large self-washing signboard.SOLUTION: A large self-washing signboard comprises an advertising box. The advertising box is installed so that a washing space penetrates horizontally. A signboard is fixedly installed at the right end of the washing space. A projection space that is open leftward is installed on a left end surface of the signboard. A screen is fixedly installed on a right wall of the projection space. A show window is fixedly installed at the left end of the projection space. A projector is fixedly installed on a lower wall of the projection space. A washing device is installed in the washing space. The large self-washing signboard can use a projection signboard to project dynamic advertisements such as videos, attract people's attention, and achieve a better advertising effect, and can use rain rationally to save drinking water.SELECTED DRAWING: Figure 1

Description

The present invention is related to the field of equipment technology for advertising, and specifically, is a large signboard that can be automatically washed.

Product advertising is playing an important role as competition in the commercial sector becomes increasingly fierce. However, large signboards that provide static and static information cannot attract people's attention, and people tend to get tired of seeing static advertisements, which does not have the effect of spreading products. On the other hand, ordinary dynamic billboards use large displays, which are expensive, fragile, difficult to maintain, and easy to collect dust because they are installed outdoors, cleaning many billboards. In order to do so, it is necessary to stand up high and wash regularly, which threatens the safety of workers. The present invention discloses a device capable of solving the above problems.

Chinese Patent Application Publication No. 107863017

Technical problem: Large signboards that provide static and static information cannot be of interest to people. On the other hand, ordinary dynamic billboards use large displays, which are expensive, fragile, difficult to maintain, and easy to collect dust because they are installed outdoors, cleaning many billboards. In order to do so, it is necessary to stand up high and wash regularly, which threatens the safety of workers.

In order to achieve the above object, the present invention designs a large signboard that can be automatically washed. The large signboard that can be automatically washed according to the present invention includes an advertising box, and the advertising box is installed so that the cleaning space penetrates left and right, and the signboard is fixedly installed at the right end of the cleaning space. A projection space open to the left is installed on the left end surface of the signboard, a screen is fixedly installed on the right wall of the projection space, and a show window is fixedly installed on the left end of the projection space. A projector is fixedly installed on the lower wall of the projection space, a cleaning device is installed in the cleaning space, the cleaning device is located on the left side of the show window, and the cleaning device cleans the surface of the show window. The cleaning device can be cleaned, and the cleaning device includes slide rails installed so as to communicate with the upper and lower walls of the cleaning space, the slide rails are vertically symmetrical and open in opposite directions, and between the front and rear walls of the slide rails. Is installed so that the screw can rotate, and in the screw, a slider that can rotate back and forth is connected by a screw thread in the slide rail so that the rotation axis can rotate between the opposite end faces of the slider. The cleaning roller is fixedly installed on the outer peripheral surface of the rotating shaft, and the rack is vertically symmetrically and fixedly installed on the left end surface of the signboard, and the cleaning roller is vertically installed on the rotating shaft. Gears that mesh with the rack are fixedly installed on both sides, fixed blocks are fixedly installed vertically symmetrically on the right end surface of the advertising box, and support rods that pass through the fixed block are installed in the fixed block. Are installed symmetrically and fixedly, a rain collecting box is fixedly installed on the left end surface of the lower end of the support rod on the rear side, and water storage opened upward on the upper end surface of the rain collecting box. A space is installed, a rain collecting device is installed in the water storage space, and the rain collecting device is uniformly arranged between the upper front and rear walls of the water storage space, and a rotating plate installed so as to be rotatable is provided. Including, a mixing device is installed below the rotating plate in the water storage space, and the mixing device includes a second motor fixedly installed in the lower wall of the water storage space, and the second motor An impeller is connected to the upper end of the space so that it can be transmitted.

Preferably, the cleaning device includes slide grooves formed so as to communicate with the left and right walls of the slide rail, and position limiting blocks that can slide back and forth in the slide grooves are fixed to the left and right end surfaces of the slider. The storage space is installed so as to communicate with the rear wall of the cleaning space, the storage space is located on the left side of the sign, and the rear end of the rack extends into the storage space. When the cleaning roller slides to the rear limit position, it is stored in the storage space.

Preferably, a gear space is installed in the front wall of the cleaning space, the gear space is located at the front end of the screw, the front end of the screw extends into the gear space, and the front end of the screw. The first helical gear is fixedly installed in, the first motor is fixedly installed in the front wall of the cleaning space, and the first motor is fixedly installed between the gear spaces on both the upper and lower sides. The second helical gear, which is located and meshes with the first helical gear, is connected in the gear space at both upper and lower ends of the first motor so that the second helical gear can be transmitted.

Preferably, the rain collecting device includes a slide rod space installed so as to communicate with the rear wall of the water storage space, the slide rod space is located below the rotating plate, and the slide rod space is contained therein. The slide rod is installed so that it can slide left and right, the position limiting holes penetrate the slide rod in the front-rear direction and are evenly arranged, and the connecting block is fixedly installed on the right side of the lower end surface of the rotating plate. A position limiting rod whose rear end extends into the position limiting hole is fixedly installed at the lower end of the connecting block, and the position limiting rod can slide up and down in the position limiting hole to accommodate the water storage space. A rotation control space is installed in the right wall, the rotation control space is located on the right side of the slide rod, the right end of the slide rod extends into the rotation control space, and the right end of the slide rod The first spring is fixedly connected to the right wall of the rotation control space.

Preferably, a rotation start space for causing rotation is installed in the right wall of the water storage space, the rotation start space is located below the rotation control space, and between the water storage space and the rotation start space. Is installed so that the communication port communicates with each other, and a floating ball rod whose right end extends into the rotation start space is installed between the front and rear walls of the communication port so that the rotation start space and the rotation control can be rotated. The contact rod slide rail is installed so as to communicate with the space, and the first contact rod is installed in the contact rod slide rail so that the first contact rod can slide up and down. The lower end of the rod extends into the rotation start space, and the second contact rod is fixedly installed at the lower end of the first contact rod, and the front end of the second contact rod is in contact with the floating ball rod. The left end of the floating ball rod extends into the water storage space, and the first floating ball is fixedly installed at the left end of the floating ball rod and opens downward at the lower end surface of the slide rod. A contact groove is formed, and the upper end of the first contact rod comes into contact with the slope of the contact groove.

Preferably, a hooking block space opened forward is installed on the front end surface of the first contact rod, and the hooking block is installed in the hooking block space so that the hooking block can slide back and forth, and after the hooking block. A third spring is fixedly connected between the end and the rear wall of the hooking block space, and a drawstring is fixedly connected between the rear end of the hooking block and the rear end of the floating ball rod. Then, two hooking grooves are installed on both the upper and lower sides of the front wall of the contact rod slide rail so as to communicate with each other, and when the first contact rod slides to the upper limit position, the hooking block When the front end extends into the upper hook groove and the first contact rod slides to the lower limit position, the front end of the hook block extends into the lower hook groove.

Preferably, the mixing device includes a net plate fixedly installed on the side wall of the water storage space, the net plate is located between the slide rod space and the rotation start space, and the upper end surface of the net plate. A stone ink layer is fixedly installed in the water storage space, and a cleaning agent space is installed below the rotation start space in the right wall of the water storage space, and between the lower end of the left wall of the cleaning agent space and the water storage space. The mixing passage is installed so as to communicate with each other, the mixing control space is installed so as to communicate with the upper wall of the mixing passage, and the mixing stop plate is installed in the mixing control space so as to slide up and down. A second spring is fixedly connected between the upper end of the mixing stop plate and the mixing control space, and a connecting rod is fixed in the mixing passage under the left end surface of the mixing stop plate. The left end of the connecting rod extends into the water storage space, and the second floating ball is fixedly installed at the left end of the connecting rod.

Preferably, a liquid concentration detector connected so as to be able to energize the second motor is fixedly installed on the left wall of the water storage space, and the liquid concentration detector can inspect the concentration of the cleaning agent in water. When the concentration of the cleaning agent is smaller than the set value, the second motor is operated, and when the impeller rotates, the water pushes the second floating ball upward, and the mixing stop plate slides upward. The cleaning agent in the cleaning agent space enters the water storage space and is uniformly agitated by the impeller.

Preferably, a nozzle support stand is fixedly installed on the upper end surface of the fixed block on the upper side, and a nozzle obliquely facing the show window is fixedly installed on the front end of the nozzle support stand to form the water storage space. A water pump is fixedly installed at the lower end of the right wall of the water pump, a water supply passage is installed at the right end of the water pump so as to communicate with the nozzle, and the water supply passage communicates with the nozzle by the support rod on the rear side.

The beneficial effect of the present invention is: The large self-cleanable signboard of the present invention can use a projection signboard to project dynamic advertisements such as videos, attract people's interest, and have a better advertising effect. In addition, the lower rain collector can automatically operate to collect rain or stop automatically to prevent the stored water from evaporating, and the rain is filtered and then automatically cleaned. Mix with to reach the set concentration, so rain can clean the surface of the sign more cleanly. And use rain rationally to save drinking water.

In order to explain the present invention in detail with reference to FIGS. 1 to 6 below and to explain the present invention in a convenient manner, the following directions are defined as follows: FIG. The left-right front-back direction and the up-down, left-right front-back direction of the self-projection relationship in FIG. 1 coincide with each other.

FIG. 1 is a schematic diagram of the overall configuration of a large signboard that can be automatically washed according to the present invention. FIG. 2 is a cross-sectional view taken along the line “AA” in FIG. FIG. 3 is a cross-sectional view in the “BB” direction in FIG. FIG. 4 is an enlarged schematic view of “C” in FIG. FIG. 5 is a cross-sectional view in the “DD” direction in FIG. FIG. 6 is an enlarged schematic view of “E” in FIG.

The present invention relates to a large signboard that can be automatically washed, and is mainly applied to automatically cleaning a large advertising signboard in a public place. Hereinafter, the present invention will be further described with reference to the drawings of the present invention.

The large signboard that can be automatically washed according to the present invention includes an advertising box 11, and the advertising box 11 is installed so that the cleaning space 12 penetrates left and right, and the signboard 13 is fixed to the right end of the cleaning space 12. A projection space 14 opened to the left is installed on the left end surface of the signboard 13, and a screen 15 is fixedly installed on the right wall of the projection space 14 at the left end of the projection space 14. The show window 16 is fixedly installed, the projector 24 is fixedly installed on the lower wall of the projection space 14, the cleaning device 101 is installed in the cleaning space 12, and the cleaning device 101 is the show window. Located on the left side of 16, the cleaning device 101 can clean the surface of the show window 16, and the cleaning device 101 includes a slide rail 17 installed so as to communicate with the upper and lower walls of the cleaning space 12, and the slide. The rail 17 is vertically symmetrical and opens in opposite directions, and is installed so that the screw 18 can rotate between the front and rear walls of the slide rail 17, and the screw 18 rotates back and forth in the slide rail 17. The sliders 19 that can be formed are connected by threads, and the rotating shaft 22 is installed so as to be rotatable between the opposite end faces of the slider 19, and the cleaning roller 23 is fixedly installed on the outer peripheral surface of the rotating shaft 22. A rack 27 is vertically symmetrically and fixedly installed on the left end surface of the signboard 13, and gears 25 that mesh with the rack 27 are fixedly installed on both upper and lower sides of the cleaning roller 23 on the rotating shaft 22. A fixed block 32 is installed vertically and fixedly on the right end surface of the advertising box 11, and a support rod 33 passing through the fixed block 32 is installed in the fixed block 32 symmetrically and in the front-rear manner. A rain collecting box 34 is fixedly installed on the left end surface of the lower end of the support rod 33 on the rear side, and a water storage space 64 opened upward is installed on the upper end surface of the rain collecting box 34. A rain collecting device 102 is installed in the water storage space 64, and the rain collecting device 102 is uniformly arranged between the upper front and rear walls of the water storage space 64 and is installed so as to be rotatable. A second motor including 35, a mixing device 103 is installed below the rotating plate 35 in the water storage space 64, and the mixing device 103 is fixedly installed in the lower wall of the water storage space 64. 58 is included, and an impeller 59 is connected to the upper end of the second motor 58 so that it can be transmitted. It is tied.

Beneficially, the cleaning device 101 includes slide grooves 20 formed to communicate with the left and right walls of the slide rail 17, and slides back and forth in the slide grooves 20 on the left and right end surfaces of the slider 19. A possible position limiting block 21 is fixedly installed, a storage space 26 is installed so as to communicate with the rear wall of the cleaning space 12, and the storage space 26 is located on the left side of the signboard 13, and the rack 27 The rear end extends into the storage space 26, and when the cleaning roller 23 slides to the rear limit position, it is stored in the storage space 26.

To be beneficial, a gear space 28 is installed in the front wall of the cleaning space 12, the gear space 28 is located at the front end of the screw 18, and the front end of the screw 18 is in the gear space 28. The first helical gear 29 is fixedly installed at the front end of the screw 18, and the first motor 30 is fixedly installed in the front wall of the cleaning space 12. One motor 30 is located between the gear spaces 28 on both the upper and lower sides, and the first helical gear 29 meshes with the first helical gear 29 in the gear space 28 at both upper and lower ends of the first motor 30. 31 are connected so that they can be transmitted.

Beneficially, the rain collecting device 102 includes a slide rod space 36 installed so as to communicate with the rear wall of the water storage space 64, and the slide rod space 36 is located below the rotating plate 35. The slide rod 38 is installed in the slide rod space 36 so that it can slide left and right, and the position limiting holes 71 penetrate the slide rod 38 in the front-rear direction and are uniformly arranged, and the lower end surface of the rotating plate 35 is formed. A connecting block 37 is fixedly installed on the right side of the connecting block 37, and a position limiting rod 72 whose rear end extends into the position limiting hole 71 is fixedly installed at the lower end of the connecting block 37. Can slide up and down in the position limiting hole 71, a rotation control space 39 is installed in the right wall of the water storage space 64, and the rotation control space 39 is located on the right side of the slide rod 38. The right end of the slide rod 38 extends into the rotation control space 39, and the first spring 40 is fixedly connected between the right end of the slide rod 38 and the right wall of the rotation control space 39. ..

To be beneficial, a rotation start space 41 that causes rotation is installed in the right wall of the water storage space 64, the rotation start space 41 is located below the rotation control space 39, and the water storage space 64 and the water storage space 64 and the above. A communication port 42 is installed so as to communicate with the rotation start space 41, and a floating ball rod 43 whose right end extends into the rotation start space 41 can rotate between the front and rear walls of the communication port 42. The contact rod slide rail 44 is installed so as to communicate between the rotation start space 41 and the rotation control space 39, and the first contact rod is contained in the contact rod slide rail 44. The 45 is installed so that it can slide up and down, the lower end of the first contact rod 45 extends into the rotation start space 41, and the second contact rod 46 is at the lower end of the first contact rod 45. It is fixedly installed, the front end of the second contact rod 46 can come into contact with the floating ball rod 43, the left end of the floating ball rod 43 extends into the water storage space 64, and the floating ball rod 43 A first floating ball 47 is fixedly installed at the left end, a contact groove 70 opened downward is formed on the lower end surface of the slide rod 38, and the upper end of the first contact rod 45 is the contact groove. It comes into contact with the slope of 70.

To be beneficial, a hooking block space 65 opened forward is installed on the front end surface of the first contact rod 45, and the hooking block 66 is installed in the hooking block space 65 so that the hooking block 66 can slide back and forth. A third spring 67 is fixedly connected between the rear end of the hooking block 66 and the rear wall of the hooking block space 65, and the rear end of the hooking block 66 and the rear end of the floating ball rod 43. A drawstring 69 is fixedly connected between the two, and two hook grooves 68 are installed on both the upper and lower sides of the front wall of the contact rod slide rail 44 so as to communicate with each other. When the 45 slides to the upper limit position, the front end of the hook block 66 extends into the upper hook groove 68, and when the first contact rod 45 slides to the lower limit position, the hook block 66 The front end of the rod extends into the catching groove 68 on the lower side.

Beneficially, the mixing device 103 includes a net plate 48 fixedly installed on the side wall of the water storage space 64, and the net plate 48 is positioned between the slide rod space 36 and the rotation start space 41. A stone ink layer 49 is fixedly installed on the upper end surface of the net plate 48, and a cleaning agent space 50 is installed below the rotation start space 41 in the right wall of the water storage space 64 to perform the cleaning. A mixing passage 51 is installed so as to communicate between the lower end of the left wall of the agent space 50 and the water storage space 64, and a mixing control space 52 is installed so as to communicate with the upper wall of the mixing passage 51. A mixing stop plate 53 is installed in the mixing control space 52 so as to slide up and down, and a second spring 54 is fixedly connected between the upper end of the mixing stop plate 53 and the mixing control space 52. A connecting rod 55 is fixedly installed in the mixing passage 51 on the lower side of the left end surface of the mixing stop plate 53, and the left end of the connecting rod 55 extends into the water storage space 64 and is connected. A second floating ball 56 is fixedly installed at the left end of the rod 55.

To be beneficial, a liquid concentration detector 57 connected so as to be able to energize the second motor 58 is fixedly installed on the left wall of the water storage space 64, and the liquid concentration detector 57 is a cleaning agent in water. When the concentration of the cleaning agent is less than the set value, the second motor 58 is operated, and when the impeller 59 rotates, the water pushes the second floating ball 56 upward, and further, the above. The mixing stop plate 53 slides upward, and the cleaning agent in the cleaning agent space 50 enters the water storage space 64 and is uniformly agitated by the impeller 59.

To be beneficial, a nozzle support stand 62 is fixedly installed on the upper end surface of the upper fixed block 32, and a nozzle 63 obliquely facing the show window 16 is fixed to the front end of the nozzle support stand 62. A water pump 60 is fixedly installed at the lower end of the right wall of the water storage space 64, and a water supply passage 61 is installed at the right end of the water pump 60 so as to communicate with the water pump 60. The support rod 33 communicates with the nozzle 63.

The procedure for using the automatically washable large signboard of the present invention will be described in detail with reference to FIGS. 1 to 6 below.

At the beginning, the support rod 33 is in the rear limit position, the cleaning roller 23 is housed in the storage space 26, the rotating plate 35 is in the horizontal state, the slide rod 38 is in the right limit position, and so on. The one-contact rod 45 is in the lower limit position, the front end of the hook block 66 extends into the lower hook groove 68, and the mixing stop plate 53 is in the lower limit position.

When the large auto-washable sign of the present invention is activated, the projector projects the video of the advertisement on the left edge of the screen, and when the water level is low in the water storage space, the first floating ball descends the left edge of the floating ball rod. Further, the right end of the floating ball rod rises and abuts on the front end of the second contact rod, and at this time, the slope of the hooking block abuts on the upper wall of the lower hooking groove and contracts into the hooking block space. Then, the first contact rod slides upward, the first contact rod comes into contact with the slope of the contact groove, the slide rod is further slid to the left, and the position limiting rod slides to the left together with the slide rod. Then, when the rotating plate is rotated synchronously by the connecting block and the first contact rod slides upward to the limit position, the front end of the hook block extends into the upper hook groove under the action of the third spring. Moreover, the first contact rod stops sliding downward, and at this time, the slide rod slides to the left limit position, the rotating plate rotates and becomes vertical, and when it rains, it collects rain. When the rain is filtered through the ink layer and then stored in the water storage space, the first floating ball lowers the right end of the floating ball rod when the water level rises, and when the water level rises to the set altitude. The right end of the floating ball rod pulls the pull string and pulls the catch block back into the block space, the first contact rod slides downward, the pull string loosens, and the catch block acts under the action of the third spring. The front end is flipped down into the lower hook groove, the slide rod slides to the right to the limit position under the action of the first spring, and the rotating plate is rotated synchronously to return to the horizontal state, and the water storage space When cleaning the surface of the show window, the liquid concentration detector checks the concentration of the cleaning agent in the water, and if the standard concentration is not reached, the first The two motors are operated, the second motor rotates the impeller, and when the impeller rotates, the water is agitated and rotated, and the water pushes the second floating ball upward and the mixing stop plate slides upward. Then, the cleaning agent in the cleaning agent space flows into the water storage space and is evenly agitated by the impeller, and when the standard concentration is reached, the second motor is stopped, the water pump is operated, and the water supply passage is operated. Water is sent to the nozzle by the nozzle, the left end surface of the show window is washed away using water with a cleaning agent, and the first motor is activated. The second is to rotate the helical gear, further rotate the screw by meshing the gear, slide the slider forward by meshing with the thread, and when the slider slides forward, the gear and rack move relative to each other, and further When the gears rotate to rotate the axis of rotation, the cleaning roller rotates to wipe the left edge of the show window, and the slider slides to the front limit position, the first motor rotates in the opposite direction and the slider slides backward. Then, when the cleaning roller rotates the rotation shaft and the cleaning roller in opposite directions and the slider slides backward to the limit position, the cleaning roller is stored in the storage space again and returns to the initial state.

The beneficial effect of the present invention is: The self-cleanable large signboard of the present invention can use the projection type signboard to project dynamic advertisements such as videos, which can attract people's interest and improve the advertising effect. In addition, the lower rain collector can automatically operate to collect rain or stop automatically to prevent the stored water from evaporating, and the rain is filtered and then automatically cleaned. Mix with to reach the set concentration, so rain can clean the surface of the sign more cleanly. And use rain rationally to save drinking water.

By the above method, those skilled in the art can make various changes based on the operation mode within the scope of the present invention.

Claims (9)

Including the advertising box, the advertising box is installed so that the cleaning space penetrates left and right, a signboard is fixedly installed at the right end of the cleaning space, and a projection opened to the left on the left end surface of the signboard. A space is installed, a screen is fixedly installed on the right wall of the projection space, a show window is fixedly installed on the left end of the projection space, and a projector is fixedly installed on the lower wall of the projection space. A cleaning device is installed in the cleaning space, the cleaning device is located on the left side of the show window, the cleaning device can clean the surface of the show window, and the cleaning device is an upper and lower wall of the cleaning space. The slide rail is vertically symmetrical and opens in opposite directions, and is installed between the front and rear walls of the slide rail so that the screw can rotate. A slider that can rotate back and forth is connected to the slide rail by a screw thread, and a rotation shaft is installed between the opposite end faces of the slider so that the rotation shaft can rotate. A cleaning roller is provided on the outer peripheral surface of the rotation shaft. Is fixedly installed, a rack is vertically symmetrically and fixedly installed on the left end surface of the signboard, and gears that mesh with the rack are fixedly installed on both upper and lower sides of the cleaning roller on the rotating shaft. A fixed block is installed vertically symmetrically and fixedly on the right end surface of the advertising box, and a support rod passing through the fixed block is installed symmetrically and fixedly on the fixed block. A rain collecting box is fixedly installed on the left end surface of the lower end of the support rod on the rear side, a water storage space opened upward is installed on the upper end surface of the rain collecting box, and rain is contained in the water storage space. A collecting device is installed, and the rain collecting device includes a rotating plate that is uniformly arranged between the upper front and rear walls of the water storage space and is installed so as to be rotatable, and is below the rotating plate in the water storage space. Is equipped with a mixing device, which includes a second motor fixedly installed in the lower wall of the water storage space, and is connected to the upper end of the second motor so that an impeller can be transmitted. A large sign that can be automatically washed. The cleaning device includes slide grooves formed so as to communicate with the left and right walls of the slide rail, and position limiting blocks that can slide back and forth in the slide grooves are fixedly installed on both left and right end surfaces of the slider. , The storage space is installed on the rear wall of the cleaning space so as to communicate with each other, the storage space is located on the left side of the signboard, the rear end of the rack extends into the storage space, and the cleaning roller The large signboard that can be automatically washed according to claim 1, wherein the signboard is stored in the storage space when it is slid to the limit position on the rear side. A gear space is installed in the front wall of the cleaning space, the gear space is located at the front end of the screw, the front end of the screw extends into the gear space, and the front end of the screw has a second gear space. One is that the helical gear is fixedly installed, the first motor is fixedly installed in the front wall of the cleaning space, and the first motor is located between the gear spaces on both the upper and lower sides. The first aspect of claim 1, wherein the second helical gear that meshes with the first helical gear is connected to the upper and lower ends of the first motor so as to be transmitted in the gear space. Large sign that can be washed automatically. The rain collecting device includes a slide rod space installed so as to communicate with the rear wall of the water storage space, the slide rod space is located below the rotating plate, and a slide rod is contained in the slide rod space. It is installed so that it can slide left and right, the position limiting holes penetrate the slide rod back and forth and are evenly arranged, and the connecting block is fixedly installed on the right side of the lower end surface of the rotating plate, and the connecting At the lower end of the block, a position limiting rod whose rear end extends into the position limiting hole is fixedly installed, and the position limiting rod can slide up and down in the position limiting hole, and can be slid up and down in the position limiting hole on the right wall of the water storage space. A rotation control space is installed therein, the rotation control space is located on the right side of the slide rod, the right end of the slide rod extends into the rotation control space, and the right end of the slide rod and the rotation control. The large signboard that can be automatically washed according to claim 1, wherein the first spring is fixedly connected to the right wall of the space. A rotation start space for causing rotation is installed in the right wall of the water storage space, the rotation start space is located below the rotation control space, and a communication port is provided between the water storage space and the rotation start space. Are installed so as to communicate with each other, and a floating ball rod whose right end extends into the rotation start space is installed between the front and rear walls of the communication port so as to be able to rotate. The contact rod slide rails are installed so as to communicate with each other, and the first contact rod is installed in the contact rod slide rail so that the first contact rod can slide up and down, and the lower end of the first contact rod A second contact rod is fixedly installed at the lower end of the first contact rod while extending into the rotation start space, and the front end of the second contact rod can come into contact with the floating ball rod. The left end of the floating ball rod extends into the water storage space, the first floating ball is fixedly installed at the left end of the floating ball rod, and a contact groove opened downward on the lower end surface of the slide rod. The large signboard that can be automatically cleaned according to claim 1, wherein the upper end of the first contact rod comes into contact with the slope of the contact groove. A hooking block space opened forward is installed on the front end surface of the first contact rod, and the hooking block is installed in the hooking block space so that the hooking block can slide back and forth, and the rear end of the hooking block and the above. A third spring is fixedly connected to the rear wall of the hooking block space, and a pull string is fixedly connected between the rear end of the hooking block and the rear end of the floating ball rod. Two hooking grooves are installed on both the upper and lower sides of the front wall of the contact rod slide rail so as to communicate with each other, and when the first contact rod slides to the upper limit position, the front end of the hooking block is on the upper side. The first contact rod extends into the catching groove of the above, and when the first contact rod slides to a lower limit position, the front end of the catching block extends into the catching groove on the lower side. Large signboard that can be automatically washed as described in 5. The mixing device includes a net plate fixedly installed on the side wall of the water storage space, the net plate is located between the slide rod space and the rotation start space, and the upper end surface of the net plate is covered with stone ink. The layer is fixedly installed, a cleaning agent space is installed below the rotation start space in the right wall of the water storage space, and a mixture is mixed between the lower end of the left wall of the cleaning agent space and the water storage space. The passages are installed so as to communicate with each other, the mixing control space is installed so as to communicate with the upper wall of the mixing passage, and the mixing stop plate is installed in the mixing control space so as to slide up and down. A second spring is fixedly connected between the upper end of the mixing stop plate and the mixing control space, and a connecting rod is fixedly installed in the mixing passage under the left end surface of the mixing stop plate. The automatic cleaning according to claim 1, wherein the left end of the connecting rod extends into the water storage space, and a second floating ball is fixedly installed at the left end of the connecting rod. Large signboard. A liquid concentration detector connected so as to be able to energize the second motor is fixedly installed on the left wall of the water storage space, and the liquid concentration detector can inspect the concentration of the cleaning agent in water and can be used as a cleaning agent. When the concentration is less than the set value, the second motor is operated, and when the impeller rotates, the water pushes the second floating ball upward, and the mixing stop plate slides upward, and the cleaning agent. The large signboard that can be automatically cleaned according to claim 1, wherein the cleaning agent in the space enters the water storage space and is evenly agitated by the impeller. A nozzle support stand is fixedly installed on the upper end surface of the upper fixed block, and a nozzle obliquely facing the show window is fixedly installed on the front end of the nozzle support stand, and the right wall of the water storage space is fixedly installed. A water pump is fixedly installed at the lower end, a water supply passage is installed at the right end of the water pump so as to communicate with the nozzle, and the water supply passage communicates with the nozzle by the support rod on the rear side. The large sign that can be automatically washed according to claim 1.

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