CN112951073A

CN112951073A - Intelligent signboard

Info

Publication number: CN112951073A
Application number: CN202110153622.8A
Authority: CN
Inventors: 叶际满; 吴晓刚; 吴颖曦
Original assignee: Hangzhou Ruleway Sign System Engineering Co ltd
Current assignee: Hangzhou Ruleway Sign System Engineering Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-06-11
Anticipated expiration: 2041-02-04
Also published as: CN112951073B

Abstract

The utility model relates to an intelligent signboard, include the framework and locate the signboard body in the framework, the positive back of signboard body all is equipped with the display area, the signboard body still is equipped with transparent protective ring membrane, protective ring membrane is followed the horizontal circumference of signboard body centers on the signboard body sets up, the framework is equipped with and is used for the shake subassembly of protective ring membrane, the horizontal both sides of framework all are equipped with and are used for driving protective ring membrane around the drive assembly of signboard body circumferential motion, the horizontal both sides of framework all are equipped with the brush roller, the brush hair butt of brush roller in protective ring membrane's surface. This application is through the protective ring membrane that sets up around the signboard body to the adhesion of separation sand and dust is on the signboard body, and shakes the brush removal of brush roller through shaking the subassembly to the protective ring membrane, with the sand and dust of getting rid of protective ring membrane surface, and then has ensured the clear show of the display area of signboard body.

Description

Intelligent signboard

Technical Field

The application relates to the field of signboard, especially, relate to an intelligence signboard.

Background

The signboard can mark some information on a specific installation surface to play a role of indicating identification, and is usually arranged on a scenic spot, a cell, a room, a road or a sidewalk to facilitate guidance.

Therefore, the most important purpose of the signboard is to display the information mark on the signboard so as to enable people to visually and clearly understand the information mark.

However, in an environment with more external dust or more frequent wind and sand, the dust is easy to attach to the surface of the signboard, thereby affecting the display of the information sign of the signboard.

Disclosure of Invention

In order to ensure the information sign show of signboard, this application provides an intelligence signboard.

The application provides a pair of intelligent signboard adopts following technical scheme:

the utility model provides an intelligent signboard, includes the framework and locates the signboard body in the framework, the positive back of signboard body all is equipped with the display area, the signboard body still is equipped with transparent protective ring membrane, protective ring membrane edge the horizontal circumference of signboard body centers on the signboard body sets up, the framework is equipped with and is used for the shake subassembly of protective ring membrane, the horizontal both sides of framework all are equipped with and are used for driving protective ring membrane around signboard body circumferential motion's drive assembly, the horizontal both sides of framework all are equipped with the brush roller, the brush hair butt of brush roller in protective ring membrane's surface.

By adopting the technical scheme, the protective ring film arranged around the signboard body prevents sand and dust from adhering to the signboard body, so that the display area of the signboard body can be clearly displayed only by cleaning the outer surface of the protective ring film; when the dust on the protective ring film is too much, the driving component is started to drive the protective ring film to move around the signboard body, and then the shaking component is started to shake the flexible protective ring film, so that floating dust on the protective ring film is shaken off, which is the first cleaning; then the part of the protective ring film, which is attached with the sand and dust, is moved to the brush roller, the protective ring film moves relative to the brush roller, and the bristles of the brush roller sweep the sand and dust on the outer surface of the protective ring film, which is the second cleaning, so that the sand and dust on the protective ring film are reduced, and the display of the signboard body is ensured; and, the signboard body has two display area territories, and one comes, can carry out the show of different contents to the pedestrian of equidirectional not, and two comes, and the positive back of signboard body can be protected simultaneously to annular protective ring membrane to the protective ring membrane only needs to move half route of self girth and can accomplish the dust and sand clearance, and the protective ring membrane position of front and back is also carried out once surface clearance when exchanging promptly, thereby shortens clearance time.

Optionally, the shaking assembly includes a plurality of shaking blocks fixed to the frame body, the shaking blocks are horizontally arranged, and a tooth surface along the length direction of the shaking blocks is arranged on the side surface of the shaking blocks; and the horizontal side edge of the protective ring film is provided with an elastic vertical arm which is used for being engaged and matched with the tooth surface.

Through adopting above-mentioned technical scheme, when the motion of protective ring membrane, the relative shake piece motion of the elasticity vertical arm on it, and elasticity vertical arm has elasticity, consequently elasticity vertical arm can mesh with the flank of tooth in proper order and break away from in the motion process for elasticity vertical arm has the shake, thereby drives the shake of protective ring membrane, and then shakes the floating dust on it off.

Optionally, each of the shaking bar blocks is located at the upper and lower horizontal side edges of the frame body, and each of the shaking bar blocks is arranged along the horizontal direction in a staggered manner.

By adopting the technical scheme, the upper side and the lower side of the protective ring film are sequentially shaken in the motion, so that all parts of the protective ring film can vibrate, and the completeness of removing floating dust is improved.

Optionally, the driving assembly comprises a first driven roller, a second driven roller, a driving roller and a driving roller which are vertically arranged in the frame, the driving roller rotates a motor, the first driven roller and the second driven roller are symmetrically arranged in the thickness direction of the signboard body, and the protective ring film sequentially bypasses the first driven roller, the driving roller and the second driven roller in the self-movement direction.

By adopting the technical scheme, the driving rollers on the two sides of the signboard body rotate simultaneously by the simultaneous driving of the motors on the two sides so as to drive the protective ring film to move around the signboard body; and the setting of first driven voller and second driven voller then is convenient for guide and changes the route of guard ring membrane for the display area of signboard body is laminated more to the guard ring membrane, has both ensured the show of display area, improves guard ring membrane motion smoothness degree again.

Optionally, the first driven roller is made of metal, and the first driven roller is connected with a grounding wire.

Through adopting above-mentioned technical scheme, can effectively dredge the static on the guard ring membrane to the condition that reduces to adsorb the dust floating because of the static is too much on the guard ring membrane takes place, ensures the information sign show of signboard body promptly.

Optionally, the driving roller drives the brush roller to rotate in the same direction, and the peripheral surface of the brush roller abuts against the outer surface of the part, located between the first driven roller and the driving roller, of the protective ring film; the frame is internally provided with a felt roller, the driving roller drives the felt roller to rotate in the same direction, and the peripheral surface of the felt roller abuts against the outer surface of the part, located between the driving roller and the second driven roller, of the protective ring film.

By adopting the technical scheme, the sand and dust on the outer surface of the protective ring film can be further removed by arranging the felt roller, the cleaning effect is improved for the third time, the cleaning mode of the felt roller is different from that of the brush roller, the brush roller is used for brushing dust, and the felt roller is used for taking away some stubborn and tiny sand and dust; in addition, the felt roller and the brush roller rotate reversely relative to the guard ring film, so that the cleaning efficiency of the brush roller and the felt roller is high; and the position that the felt roller and the brush roller butt is the easy deformation region of guard ring membrane to this department guard ring membrane surface is big with the area of contact of brush roller/felt roller, thereby ensures the clearance effect of sand and dust.

Optionally, an air inlet hole is formed in the upper portion of the frame body, and an exhaust fan is arranged on the lower portion of the frame body.

Through adopting above-mentioned technical scheme, through the exhaust fan, can make the interior airflow that forms the downward flow of framework, and this airflow can take away the sand and dust that is swept down by the brush roller, discharge the sand and dust in the framework fast promptly to avoid sand and dust secondary to be attached to on brush hair or the protective ring membrane, and then brush hair when avoiding the secondary clearance of protective ring membrane is with sand and dust adhesion in protective ring membrane surface.

Optionally, a center hole is formed in the axis of the brush roller in a penetrating manner, the frame body is provided with a fixed shaft and a rotating shaft which are respectively inserted into the upper end and the lower end of the center hole, the rotating shaft is connected with the center hole by adopting a guide flat key, and the driving roller drives the rotating shaft to rotate in the same direction; the fixed shaft is provided with a spring forcing the brush roller to slide upwards, the upper end face of the brush roller is provided with an annular wave bulge, and the fixed shaft is provided with a butting column which is butted with the wave bulge.

Through adopting above-mentioned technical scheme, through setting up the spring, keep the butt state with the butt post in order to force the wave arch on the brush roller, when the brush roller rotates, the relative wave bellying motion of butt post, thereby force the play from top to bottom of brush roller, and brush roller self rotary motion, consequently two kinds of motion modes combine together, make the relative protective ring membrane of brush hair of brush roller have the motion of multiple orbit, make the contact range of brush hair and protective ring membrane surface enlarge, and the frequency of brushing accelerates, thereby the efficiency and the effect of falling of brush roller to the sand and dust of protective ring membrane surface have been improved greatly.

Optionally, the free ends of the bristles of the brush roller are wrapped with bristle balls.

By adopting the technical scheme, the hair balls play a role in protection, and the condition that the tail ends of the hair brush rollers scratch the outer surface of the protective ring film can be reduced, so that the information display effect of the signboard body is ensured; secondly, the pompon is softer, consequently when pompon and protection ring membrane surface butt, pompon deformation and with the surface area of contact grow of protection ring membrane to improve the clearance efficiency to sand and dust greatly.

Optionally, the spacing between adjacent bristles is greater than the diameter of an individual bristle.

By adopting the technical scheme, the bristles are sparse, so that the condition that sand and dust are attached to the bristles is reduced; and because the swing amplitude of the brush hair is denser, the cleaning capability can be ensured even if the brush hair is sparser.

In summary, the present application includes at least one of the following beneficial technical effects:

the dustproof signboard is characterized in that sand and dust are prevented from being adhered to the signboard body through the protective ring film arranged around the signboard body, and the protective ring film is shaken and the brush roller is brushed off through the shaking assembly to remove the sand and dust on the outer surface of the protective ring film, so that the display area of the signboard body is clearly displayed;

by arranging the felt roller, sand and dust on the outer surface of the protective ring film can be further removed, which is the third cleaning, namely the cleaning effect is improved;

through the combination of the vertical movement and the rotating movement of the brush roller, the bristles of the brush roller move relative to the protective ring film along multiple tracks, the contact range between the bristles and the outer surface of the protective ring film is enlarged, the brushing frequency is accelerated, and the brushing efficiency and the brushing effect of the brush roller on the dust and sand on the outer surface of the protective ring film are greatly improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a partial sectional view of the present embodiment for embodying the internal structure of the frame body.

Fig. 3 is a sectional view of the entire structure of the present embodiment.

Fig. 4 is a schematic structural diagram of the driving assembly of the present embodiment.

Fig. 5 is a partially enlarged view of a portion a in fig. 2.

Fig. 6 is a partially enlarged view at B in fig. 2.

Description of reference numerals: 1. a dithering component; 2. a drive assembly; 3. brushing off the assembly; 10. a frame body; 100. a guard ring membrane; 11. dithering the bar block; 12. a tooth surface; 13. an elastic vertical arm; 20. a signboard body; 21. a first driven roller; 22. a second driven roller; 23. a drive roll; 24. a motor; 25. a ground line; 30. a support pillar; 31. a brush roller; 311. brushing; 312. a ball of wool; 313. a central bore; 32. a felt roller; 33. a rotating shaft; 34. a fixed shaft; 36. a spring; 37. a butting post; 38. the wave bulges are formed; 41. scraping a blade; 42. an air inlet hole; 43. an exhaust fan.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses intelligent signboard. Referring to fig. 1 and 2, the intelligent signboard includes a frame 10 and a signboard body 20 fixed in a hollow portion of the frame 10, wherein the length direction of the signboard body 20 is a horizontal direction.

The frame body 10 is a square frame formed by splicing four groove-shaped steels, and support columns 30 are fixed on two horizontal outer sides of the frame body 10 so as to fix the frame body 10.

The front and back of the signboard body 20 are provided with display areas for pedestrians in different directions to display different contents, and the contents of the display areas can be electronic liquid crystal screens, printed pictures and characters, pictures and characters combined by LED lamps, and the like.

As shown in fig. 3, a protective ring film 100 is arranged around the horizontal circumference of the signboard body 20, the width of the protective ring film 100 is greater than or equal to the width of the signboard body 20, and the protective ring film 100 is a transparent and flexible plastic film to block the signboard body 20 from the outside, so as to prevent external dust from directly attaching to the display area of the signboard body 20; moreover, the outer surface of the protective ring film 100 is covered with a PVC wear layer to reduce the scratch of the protective ring film 100 caused by dust and sand, so as to ensure the content display definition of the signboard body 20.

As shown in fig. 2, the frame body 10 is provided with a shaking assembly 1 for shaking the guard ring film 100, and both horizontal sides of the frame body 10 are provided with a driving assembly 2 for driving the guard ring film 100 to move circumferentially around the signboard body 20 and a brushing assembly 3 for brushing sand and dust on the outer surface of the guard ring film 100.

When the sand and dust on the outer surface of the guard ring film 100 is excessive, firstly, the driving component 2 is started to drive the guard ring film 100 to move around the signboard body 20, and then the shaking component 1 is started to shake the flexible guard ring film 100, so that floating dust on the flexible guard ring film 100 is shaken off, namely, the sand and dust on the outer surface of the guard ring film 100 is preliminarily cleaned; then, the position of the protective ring film 100 attached with the dust and sand moves to the brushing component 3, and the brushing component 3 brushes the dust and sand on the outer surface of the protective ring film 100, so that the dust and sand on the protective ring film 100 are reduced, and the display of the signboard body 20 is ensured.

As shown in fig. 3 and 4, two driving assemblies 2 are provided, and the two driving assemblies 2 are symmetrically arranged along the horizontal length direction of the signboard body 20; the driving assembly 2 comprises a first driven roller 21, a second driven roller 22, a driving roller 23 and a motor 24 for driving the driving roller 23 to rotate, wherein the first driven roller 21 is made of metal, and the first driven roller 21, the second driven roller 22 and the driving roller 23 are all vertically arranged; the first driven roller 21 and the second driven roller 22 are symmetrically disposed in the thickness direction of the signboard body 20, and the outer peripheral surface of the first driven roller 21 is closer to the front side of the frame 10 than the front side of the signboard body 20, and the outer peripheral surface of the second driven roller 22 is closer to the rear side of the frame 10 than the rear side of the signboard body 20. The guard ring film 100 sequentially passes around the first driven roller 21, the drive roller 23, and the second driven roller 22.

That is, the motors 24 on the two sides of the signboard body 20 are driven simultaneously, so that the driving rollers 23 on the two sides of the signboard body 20 rotate simultaneously, and the protective ring film 100 is driven to move around the horizontal circumference of the signboard body 20 by friction.

The first driven roller 21 is connected to a ground line 25 to dissipate static electricity, that is, to dissipate static electricity on the guard ring film 100, thereby reducing the occurrence of dust adsorption caused by excessive static electricity on the guard ring film 100.

As shown in fig. 5, the shaking assembly 1 includes a plurality of shaking bars 11 fixed to the frame 10, and the length direction of the shaking bars 11 is parallel to the horizontal length direction of the signboard body 20. In addition, each of the wobbler blocks 11 is located on the upper and lower sides of the guard ring film 100, and each of the wobbler blocks 11 on the upper and lower sides is arranged in a staggered manner along the horizontal direction, in this embodiment, three wobbler blocks 11 are located on the front side of the frame 10, one of the wobbler blocks is located in the middle of the upper side of the guard ring film 100, and the other two wobbler blocks are located on the horizontal sides of the lower side of the guard ring film 100.

As shown in fig. 5, a tooth surface 12 is provided on a side surface of the wobbler bar 11, teeth on the tooth surface 12 are arranged along a length direction of the wobbler bar 11, vertically disposed elastic vertical arms 13 are fixed on both upper and lower sides of the guard ring film 100, the elastic vertical arms 13 are made of rubber, the elastic vertical arms 13 are cylindrical, and an outer peripheral surface thereof is fitted into a concave portion of the tooth surface 12 of the wobbler bar 11.

When the guard ring film 100 moves, the elastic vertical arm 13 on the guard ring film moves relative to the shaking bar block 11, and the elastic vertical arm 13 has elasticity, so that the elastic vertical arm 13 can be sequentially matched with and separated from teeth on the tooth surface 12 in the moving process, so that the elastic vertical arm 13 shakes, the guard ring film 100 is driven to shake, floating dust on the guard ring film is shaken off, and the first cleaning is completed.

As shown in fig. 3 and 4, two brushing assemblies 3 are provided, and the two brushing assemblies 3 are symmetrically arranged along the horizontal length direction of the signboard body 20; the brushing assembly 3 comprises a vertically arranged brush roller 31 and a vertically arranged felt roller 32, wherein the brush roller 31 and the felt roller 32 are both rotatably arranged with the frame body 10, a central hole 313 is arranged at the axis of the brush roller 31 in a penetrating way, a fixed shaft 34 is fixed at the upper part of the frame body 10, and the fixed shaft 34 is inserted into the central hole 313, so that the brush roller 31 can rotate relative to the frame body 10; the bottom of the frame 10 is rotatably provided with a rotating shaft 33, the rotating shaft 33 is in belt transmission connection with an output shaft of the motor 24, the rotating shaft 33 is inserted into the central hole 313, and the rotating shaft 33 is in guiding flat key connection with the central hole 313, that is, the rotating shaft 33 can transmit the torque of the motor 24 to the brush roller 31 to drive the brush roller 31 to rotate, and the guiding flat key also allows the brush roller 31 to axially slide to a certain extent.

The peripheral surface of the brush roller 31 is covered with bristles 311, the distance between adjacent bristles 311 is larger than the diameter of a single bristle 311, i.e. the bristles 311 are sparse, the free ends of the bristles 311 are wrapped with bristles 312, and the bristles 312 abut against the outer surface of the portion, located between the first driven roller 21 and the driving roller 23, of the guard ring film 100.

As shown in fig. 4, the outer surface of the felt roller 32 is covered with short felt, and the felt on the felt roller 32 abuts against the outer surface of the portion of the guard ring film 100 between the driving roller 23 and the second driven roller 22; moreover, the felt roller 32 is in belt transmission connection with the output shaft of the motor 24, that is, the motor 24 can drive the felt roller 32 to rotate.

The motor 24 is started to drive the brush roller 31 and the felt roller 32 to rotate, wherein the brush roller 31 and the guard ring film 100 move oppositely, and the brush bristles 311 on the brush roller 31 brush most of sand and dust on the outer surface of the guard ring film 100, which is the second cleaning; the rotating felt roller 32 takes away some stubborn and tiny dust on the protective ring film 100, that is, the dust on the outer surface of the protective ring film 100 is further removed, which is the third cleaning; also, in order to improve the cleaning effect, the power sources of the brush roller 31 and the felt roller 32 may be selected to be an additional motor 24.

In order to further improve the brushing effect of the brushing assembly 3, as shown in fig. 4 and 6, a spring 36 is sleeved on the rotating shaft 33, the lower end of the spring 36 is fixedly connected with the rotating shaft 33, and the upper end of the spring 36 abuts against the lower end surface of the brush roller 31 to force the brush roller 31 to move upwards axially; the upper end surface of the brush roller 31 is provided with an annular wavy bulge 38, the central line of the wavy bulge 38 is coaxial with the axis of the brush roller 31, a horizontally arranged cylindrical abutting column 37 is fixed on the fixed shaft 34, and the peripheral surface of the abutting column 37 abuts against the wavy bulge 38.

When the brush roller 31 rotates, the wave protrusion 38 moves relative to the abutting column 37, because the surface of the wave protrusion 38 is a concave-convex transition surface, the abutting column 37 forces the brush roller 31 to move up and down, and the brush roller 31 has rotary motion, so that two motion modes are combined, the bristles 311 of the brush roller 31 move along multiple tracks relative to the guard ring film 100, the contact range between the bristles 311 and the outer surface of the guard ring film 100 is enlarged, the brushing frequency is accelerated, and the brushing efficiency and the brushing effect of the brush roller 31 on sand and dust on the outer surface of the guard ring film 100 are greatly improved.

As shown in fig. 2, a vertically disposed scraper 41 is fixed on the inner wall of the frame 10, the scraper 41 is made of rubber, the free side of the scraper 41 elastically abuts against the outer circumferential surface of the felt roller 32, that is, when some dust and sand from the protective ring film 100 are adsorbed on the outer circumferential surface of the felt roller 32, the scraper 41 will scrape off the dust and sand on the felt roller 32, so that the dust and sand on the felt roller 32 are scattered into the air inside the frame 10, and the dust and sand on the felt roller 32 are prevented from being re-adhered to the protective ring film 100.

Meanwhile, in order to prevent the dust and sand falling into the air from being secondarily contaminated on the protective ring film 100, as shown in fig. 1, an air inlet 42 is formed at the upper portion of the frame 10, an exhaust fan 43 is arranged at the lower side of the frame 10, and the air outlet of the exhaust fan 43 faces the outer side of the frame 10.

That is, when the brush roller 31 and the felt roller 32 are operated, the exhaust fan 43 is turned on to form a downward flowing air flow in the frame 10, and the air flow can take away the sand and dust scattered in the air, that is, quickly exhaust the sand and dust in the frame 10, thereby preventing the sand and dust from being secondarily attached to the brush bristles 311 or the guard ring film 100.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an intelligence signboard, includes framework (10) and signboard body (20) of locating in framework (10), its characterized in that: the signboard body (20) positive back all is equipped with the display area, signboard body (20) still is equipped with transparent protective ring membrane (100), protective ring membrane (100) are followed the horizontal circumference of signboard body (20) centers on signboard body (20) sets up, framework (10) are equipped with and are used for the shake shaking subassembly (1) of protective ring membrane (100), the horizontal both sides of framework (10) all are equipped with and are used for driving protective ring membrane (100) to wind signboard body (20) circumferential motion's drive assembly (2), the horizontal both sides of framework (10) all are equipped with brush roller (31), brush hair (311) butt of brush roller (31) in the surface of protective ring membrane (100).

2. The intelligent signboard of claim 1, wherein: the shaking assembly (1) comprises a plurality of shaking strip blocks (11) fixed on a frame body (10), the shaking strip blocks (11) are horizontally arranged, and the side surfaces of the shaking strip blocks (11) are provided with tooth surfaces (12); the horizontal side edge of the guard ring film (100) is provided with an elastic vertical arm (13) which is used for being meshed and matched with the tooth surface (12).

3. The intelligent signboard of claim 2, wherein: each shaking strip block (11) is respectively positioned at the upper horizontal side and the lower horizontal side of the frame body (10), and each shaking strip block (11) is arranged along the horizontal direction in a staggered mode.

4. The intelligent signboard of claim 1, wherein: drive assembly (2) are including vertical locating first driven voller (21), second driven voller (22), drive roll (23) and drive in framework (10) drive roll (23) pivoted motor (24), wherein first driven voller (21) and second driven voller (22) are followed signboard body (20) thickness direction symmetry sets up, first driven voller (21), drive roll (23) and second driven voller (22) are walked around in proper order along self direction of motion in guard ring membrane (100).

5. The intelligent signboard of claim 4, wherein: the first driven roller (21) is made of metal, and the first driven roller (21) is connected with a grounding wire (25).

6. The intelligent signboard of claim 4, wherein: the driving roller (23) drives the brush roller (31) to rotate in the same direction, and the peripheral surface of the brush roller (31) abuts against the outer surface of the part, located between the first driven roller (21) and the driving roller (23), of the protective ring film (100); still be equipped with felt roller (32) in framework (10), drive roller (23) drive felt roller (32) syntropy rotates, the global butt of felt roller (32) in the position of guard ring membrane (100) is located the position surface between drive roller (23) and second driven roller (22).

7. The intelligent signboard of claim 6, wherein: an air inlet hole (42) is formed in the upper portion of the frame body (10), and an exhaust fan (43) is arranged on the lower portion of the frame body (10).

8. The intelligent signboard of claim 7, wherein: the brush roller (31) is provided with a central hole (313) in a penetrating manner at the axis, the frame body (10) is provided with a fixed shaft (34) and a rotating shaft (33) which are respectively inserted into the upper end and the lower end of the central hole (313), the rotating shaft (33) is connected with the central hole (313) by adopting a guide flat key, and the driving roller (23) drives the rotating shaft (33) to rotate in the same direction; the fixed shaft (34) is provided with a spring (36) forcing the brush roller (31) to slide upwards, the upper end face of the brush roller (31) is provided with an annular wavy bulge (38), and the fixed shaft (34) is provided with an abutting column (37) abutting against the wavy bulge (38).

9. The intelligent signboard of claim 8, wherein: the free ends of the bristles (311) of the brush roller (31) are wrapped with hair balls (312).

10. The intelligent signboard of claim 8, wherein: the distance between the adjacent bristles (311) is larger than the diameter of the single bristle (311).