Combined expansion type advertisement audiovisual display mechanism

Abstract

The invention discloses a combined expansion type advertisement audio-visual display mechanism, and relates to the technical field of advertisement audio-visual display. The display mechanism is arranged above the bearing base, and the display mechanism comprises a main audio-visual display screen and an auxiliary audio-visual display screen; a protection mechanism is fixedly arranged at the center position of the top face of the bearing base and comprises a protection outer frame, and an intelligent controller is fixedly installed at the center position of the front face of the protection outer frame. Wherein a dust removal mechanism is arranged at the top of the protection mechanism, and the dust removal mechanism comprises a dust removal brush roller. According to the combined expansion type advertisement audiovisual display mechanism, the main audiovisual display screen and the auxiliary audiovisual display screen of the demonstration mechanism are expanded at different angles, so that the advertisement content achieves a combined and partitioned advertisement demonstration effect, and meanwhile, the protection mechanism and the matched dust removal mechanism carry out storage protection and auxiliary cleaning on the demonstration mechanism to improve the demonstration effect.

Description

Technical Field

[0001] The present invention relates to the technical field of advertising audio-visual display, and particularly to a combined and expandable advertising audio-visual display mechanism. Background Art

[0002] Advertising audio-visual display refers to a display method that spreads advertising information through multimedia forms such as video and sound. It mainly combines visual (image / video) and auditory (sound / music) elements. According to different types of display methods, it can highlight key information, have both dynamic pictures and sound appeal, and improve the communication coverage. Such advertising audio-visual displays are mostly used in places with large passenger flows such as venues, scenic spots, and shopping malls, and can quickly spread the display information content. The invention with the publication number CN113628570B discloses a combined audio-visual advertising device and display method. By setting the first knocking rod and the first metal bell, the intermittent emission of the bell sound is realized. The first knocking rod at the bottom of the connecting block can stably knock the first metal bell intermittently, thereby effectively attracting people's attention and increasing the people's standing rate. It solves the problem that in the prior art, in places with large population mobility, the noisy environment is relatively heavy due to the large flow of people, and the advertising display device cannot quickly and effectively attract people's attention and increase the standing and watching rate.

[0003] The invention with the publication number CN118918798B is an advertising design and display device with audio-visual combination. By setting the protection device and the cleaning device to cooperate with each other, during the process of pulling the cleaning device downward, the sliding plate slides downward along the inner wall of the protection frame, forcing the screw rod to rotate. At this time, the fan blade at the bottom of the screw rod rotates, and the air in the base is blown into the shunt jet pipe through the air duct, and finally the air blows out from the shunt jet pipe, and the dust attached to the inner wall of the curtain wall can be blown off. Thus, the curtain wall can be cleaned while cleaning the light-transmitting plate. However, the above-mentioned publicly disclosed audio-visual advertising display mechanism still has the following problems in the actual use process: By rotating multiple sides to improve the comprehensiveness of display in different directions, but such display mechanisms are prone to incomplete display of content information, and some advertising information is difficult to play through expansion. At the same time, such multi-sided display mechanisms cannot improve their own protection effect, and are prone to affecting the display effect due to sticky dust during use.

[0004] Therefore, we propose a combined and expandable advertising audio-visual display mechanism to solve the problems raised above. Summary of the Invention

[0005] The object of the present invention is to provide a combined and expandable advertising audio-visual display mechanism, aiming to solve the problems existing in the prior art. In the prior art, the comprehensiveness of display in different directions is improved by means of multi-sided rotation, but such display mechanisms are prone to incomplete display of content information, and it is difficult to play some advertising information in an expanded manner. At the same time, such multi-sided display mechanisms cannot improve their own protection effects, and are prone to affect the display effect due to sticking dust during use.

[0006] To achieve the above object, the present invention provides the following technical solutions: A combined and expandable advertising audio-visual display mechanism includes a bearing base, and a lifting column fixedly installed at the center of the top surface of the bearing base; it further includes: A display mechanism is arranged above the bearing base, and the display mechanism includes a main audio-visual display screen and a secondary audio-visual display screen, and interactive brackets are arranged inside both the main audio-visual display screen and the secondary audio-visual display screen; A protection mechanism is fixedly arranged at the center of the top surface of the bearing base, and the protection mechanism includes a protection outer frame, and an intelligent controller is fixedly installed at the center of the front surface of the protection outer frame; Among them, a dust removal mechanism is arranged at the top of the protection mechanism, and the dust removal mechanism includes a dust removal brush roller, and the outer end of the dust removal brush roller is rotatably installed at the outer part of the top surface of the protection outer frame through a torsion spring at an equal angle.

[0007] Preferably, a lifting screw is arranged at the center of the interior of the lifting column through a bearing, and the top end of the lifting screw is controlled to rotate by a servo motor inside the lifting column, and lifting chutes are equally angledly arranged on the outside of the lifting column, and the lifting column realizes the lifting demonstration operation of the display mechanism through the lifting chutes.

[0008] Preferably, the display mechanism includes a positioning sleeve, and the positioning sleeve is threadedly connected to the outer wall of the lifting screw inside the lifting column, and the outside of the positioning sleeve is fixedly connected to the inner ends of the equally angledly arranged interactive brackets, and the middle parts of the interactive brackets slidably penetrate through the lifting chutes arranged on the outside of the lifting column.

[0009] Preferably, the main audio-visual display screen included in the display mechanism is fixedly connected to the inner interactive bracket, and the secondary audio-visual display screen included in the display mechanism is movably sleeved and connected to the inner interactive bracket, and the outer ends of the main audio-visual display screen and the left and right secondary audio-visual display screens are rotatably connected through torsion springs, and a rotatable adaptive three-dimensional advertising display is formed between the main audio-visual display screen and the secondary audio-visual display screen.

[0010] Preferably, the display mechanism includes a driving rotating shaft, and the driving rotating shaft is rotatably installed inside the left and right interactive brackets at the rear through bearings. The tops of the left and right interactive brackets are rotatably provided with a transmission rotating shaft through bearings. The outer end of the transmission rotating shaft is meshed and connected to the top end of the driving rotating shaft through a bevel gear set. At the same time, the bottom end of the left driving rotating shaft is fixedly connected to the top end of the output shaft of the servo motor.

[0011] Preferably, the display mechanism includes a traction cable. The inner end of the traction cable is wound and connected to the outer walls of the upper ends of the left and right driving rotating shafts. The outer ends of the symmetrically arranged traction cables are fixedly connected to the inner walls of the left and right auxiliary audio-visual display screens. The rotation of the auxiliary audio-visual display screens at different angles realizes the combined and partitioned advertising demonstration function.

[0012] Preferably, the protection mechanism includes a protection cavity, and the protection cavity is opened inside the protection outer frame. The protection outer frame forms an internally hollow structure with an open top through the opened protection cavity. The protection outer frame shields the display mechanism after it descends.

[0013] Preferably, the dust removal mechanism includes a bottom support bracket, and the bottom support bracket is slidably arranged in the protection cavity inside the protection outer frame. The outer ends of the bottom support bracket are elastically slid through guide rods, and the guide rods are fixedly installed inside the protection outer frame. At the same time, the outer ends of the bottom support bracket are symmetrically fixedly connected to the inner ends of the guide cables.

[0014] Preferably, the inner end of the dust removal brush roller included in the dust removal mechanism penetrates through the inside of the protection outer frame. A chip removal guide groove is opened at the penetration of the protection outer frame and the dust removal brush roller. The chip removal guide groove is used to scrape and clean the dust outside the rotating dust removal brush roller.

[0015] Preferably, the rotating shaft of the dust removal brush roller included in the dust removal mechanism is wound and connected to the outer end of the guide cable. The dust removal brush roller rotates through the tensioning and relaxation of the guide cable. The rotating dust removal brush roller is used to fit the main audio-visual display screen and the auxiliary audio-visual display screen to achieve dust removal and cleaning during the lifting and lowering process.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The combined and expandable advertising audio-visual display mechanism expands the main audio-visual display screen and the auxiliary audio-visual display screen of the demonstration mechanism at different angles, enabling the advertising content to achieve the combined and partitioned advertising demonstration function. At the same time, the protection mechanism and the supporting dust removal mechanism provide storage protection for the display mechanism and assist in cleaning to improve the display effect. The specific content is as follows: 1. The main audio-visual display screen and the auxiliary audio-visual display screen are positioned and adjusted by the lifting column. The positioning sleeve is fixedly installed on the main audio-visual display screen through the interactive bracket. The servo motor at the bottom of the interactive bracket drives the drive shaft to rotate through the transmission shaft and the bevel gear group, so that the traction cable is relaxed. After the auxiliary audio-visual display screen fixedly connected to the outer end of the traction cable is relaxed, it is rotated through the torsion spring connection, so that the auxiliary audio-visual display screens on the left and right sides are flipped from back to front, forming a unified display effect with the main audio-visual display screen.

[0017] By loosening the traction cable, the secondary audio-visual display screen can be rotated, thereby adjusting the display angles of the secondary audio-visual display screens on the left and right sides relative to the main audio-visual display screen, so as to achieve a combined and corresponding demonstration effect according to the advertising content.

[0018] 2. The lifting screw inside the lifting column rotates, and the positioning sleeve threadedly connected to the lifting screw slides through the inside of the lifting slot through the interactive bracket at the outer end, and then the interactive bracket and the main audio-visual display screen and the auxiliary audio-visual display screen arranged on the outside are lifted and lowered by the positioning sleeve, so as to adapt to the display of advertisements in different usage situations.

[0019] 3. The main audio-visual display screen and the auxiliary audio-visual display screen enter the interior of the protective outer frame, and the bottom bracket is synchronously lowered, and the guide cable is tightened along the guide slide bar set through it, so that the guide cable drives the dust removal brush roller wound on the outer end to rotate, so that the dust removal brush roller can fit the main audio-visual display screen and the auxiliary audio-visual display screen to assist in cleaning the sticky dust and avoid affecting the display effect of the advertising information.

[0020] The dust removal brush roller cleans the dust stuck on the main audio-visual display screen and the auxiliary audio-visual display screen during rotation. The dust removal brush roller carries the dust and rotates, and then collides with the chip removal guide groove opened on the top of the protective outer frame to assist in scraping off the dust stuck on the outside of the dust removal brush roller, so as to prevent dust accumulation from affecting the efficiency of dust removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the main audio-visual display screen and the auxiliary audio-visual display screen of the present invention; Figure 3 This is a schematic diagram of the installation structure of the protective outer frame of the present invention; Figure 4 This is a schematic diagram of the structure of the auxiliary audio-visual display screen after expansion of the present invention; Figure 5 This is a schematic diagram of the installation structure of the secondary audio-visual display screen of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle; Figure 7Schematic diagram of the three-dimensional structure of the interactive bracket of the present invention; Figure 8 Schematic diagram of the three-dimensional structure of the protective outer frame of the present invention; Figure 9 For the present invention Figure 8 Enlarged structure diagram at position B in Figure 10 Schematic diagram of the three-dimensional structure of the display mechanism and the protection mechanism of the present invention; Figure 11 For the present invention Figure 10 Enlarged structure diagram at position C in Figure 12 Schematic diagram of the installation structure of the bottom support bracket and the dust removal brush roller of the present invention.

[0022] In the figure: 1, bearing base; 2, lifting column; 3, main audio-visual display screen; 301, secondary audio-visual display screen; 4, interactive bracket; 5, protective outer frame; 6, intelligent controller; 7, dust removal brush roller; 8, lifting screw; 9, lifting chute; 10, positioning sleeve; 11, driving rotating shaft; 12, transmission rotating shaft; 13, bevel gear set; 14, traction cable; 15, servo motor; 16, protective cavity; 17, bottom support bracket; 18, guiding slide bar; 19, guiding cable; 20, chip removal guide groove. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 - 12 , the present invention provides the following technical solutions: Embodiment 1: To solve the problems existing in the existing advertising audio-visual display mechanism during use, therefore, through the following technical solutions in this embodiment, a combined and expandable advertising audio-visual display mechanism includes a bearing base 1 and a lifting column 2 fixedly installed at the center position of the top surface of the bearing base 1; a display mechanism is arranged above the bearing base 1, and the display mechanism includes a main audio-visual display screen 3 and a secondary audio-visual display screen 301, and an interactive bracket 4 is arranged inside both the main audio-visual display screen 3 and the secondary audio-visual display screen 301.

[0025] The main audio-visual display screen 3 included in the display mechanism is fixedly connected to the inner interactive support 4, and the secondary audio-visual display screen 301 included in the display mechanism is movably sleeved and connected to the inner interactive support 4. Moreover, the outer ends of the main audio-visual display screen 3 and the secondary audio-visual display screens 301 on the left and right sides are rotationally connected by torsion springs, and a rotatable adaptive three-dimensional display is formed between the main audio-visual display screen 3 and the secondary audio-visual display screens 301. The display mechanism includes a driving rotating shaft 11, and the driving rotating shaft 11 is rotatably installed inside the interactive supports 4 on the left and right sides at the rear through bearings. Moreover, the top of the interactive supports 4 on the left and right sides is rotatably provided with a transmission rotating shaft 12 through bearings, and the outer end of the transmission rotating shaft 12 is meshed and connected to the top end of the driving rotating shaft 11 through a bevel gear set 13. At the same time, the bottom end of the left driving rotating shaft 11 is fixedly connected to the output shaft top end of the servo motor 15.

[0026] The display mechanism includes a traction steel cable 14, and the inner end of the traction steel cable 14 is wound and connected to the outer walls of the upper ends of the driving rotating shafts 11 on the left and right sides. Moreover, the outer ends of the symmetrically arranged traction steel cables 14 are fixedly connected to the inner walls of the secondary audio-visual display screens 301 on the left and right sides, and the rotation of the secondary audio-visual display screens 301 at different angles realizes the combined and corresponding demonstration effect.

[0027] As Figures 4 - 7 shown, the bearing base 1 performs positioning adjustment on the main audio-visual display screen 3 and the secondary audio-visual display screen 301 through the lifting columns 2 above. The positioning sleeve 10 inside it fixedly installs the main audio-visual display screen 3 through the interactive support 4 arranged outside. During the process of changing the display mode, the servo motor 15 at the bottom end of the interactive support 4 drives the corresponding driving rotating shaft 11 to rotate. At the same time, the left driving rotating shaft 11 drives the meshed transmission rotating shaft 12 to rotate through the bevel gear set 13 at the top end, and the transmission rotating shaft 12 drives the right driving rotating shaft 11 to rotate, so that the driving rotating shafts 11 on the left and right sides drive the traction steel cable 14 to relax during the rotation process. After the traction steel cable 14 is relaxed, the secondary audio-visual display screen 301 fixedly connected to the outer end rotates through the torsion spring connection, so that the secondary audio-visual display screens 301 on the left and right sides flip from the back to the front to form a unified display effect with the main audio-visual display screen 3.

[0028] Furthermore, the relaxation of the traction steel cable 14 enables the secondary audio-visual display screen 301 to rotate, thereby adjusting the display angles of the secondary audio-visual display screens 301 on the left and right sides relative to the main audio-visual display screen 3, so as to realize the combined and corresponding demonstration effect according to the advertisement content.

[0029] Embodiment 2: To solve the problems existing in the use of the existing audio-visual advertising display mechanism, this embodiment adopts the following technical solution. At the central position inside the lifting column 2, there is a lifting screw rod 8 through a bearing, and the top end of the lifting screw rod 8 is controlled to rotate by a servo motor inside the lifting column 2. Moreover, lifting sliding grooves 9 are equiangularly opened on the outside of the lifting column 2, and the lifting column 2 realizes the lifting demonstration operation of the display mechanism through the lifting sliding grooves 9.

[0030] The display mechanism includes a positioning sleeve 10, and the positioning sleeve 10 is threadedly connected to the outer wall of the lifting screw rod 8 inside the lifting column 2. Moreover, the outer part of the positioning sleeve 10 is fixedly connected to the inner ends of the equally-angularly arranged interaction brackets 4, and the middle part of the interaction brackets 4 slidably penetrates through the lifting sliding grooves 9 opened on the outside of the lifting column 2.

[0031] As Figures 1 - 2 、 Figure 5 As shown in the figure, the lifting column 2 on the top of the bearing base 1 performs load-bearing adjustment for the overall display mechanism. Then, the servo motor inside the lifting column 2 drives the lifting screw rod 8 to rotate during operation, so that the positioning sleeve 10 threadedly connected to the lifting screw rod 8 slides through the inside of the lifting sliding groove 9 through the interaction bracket 4 at the outer end. Furthermore, the positioning sleeve 10 drives the interaction bracket 4 and the main audio-visual display screen 3 and the sub-audio-visual display screen 301 arranged on the outside to perform lifting adjustment, so as to adapt to the display of advertisements under different usage conditions.

[0032] Embodiment 3: To solve the problems existing in the use of the existing audio-visual advertising display mechanism, this embodiment adopts the following technical solution. At the central position on the top surface of the bearing base 1, a protection mechanism is fixedly arranged. The protection mechanism includes a protection outer frame 5, and an intelligent controller 6 is fixedly installed at the central position on the front surface of the protection outer frame 5. Among them, a dust removal mechanism is arranged at the top of the protection mechanism. The dust removal mechanism includes a dust removal brush roller 7, and the outer end of the dust removal brush roller 7 is rotatably installed at equal angles on the outside of the top surface of the protection outer frame 5 through a torsion spring. The protection mechanism includes a protection cavity 16, and the protection cavity 16 is opened inside the protection outer frame 5. Moreover, the protection outer frame 5 forms an inner hollow structure with an open top through the opened protection cavity 16, and the protection outer frame 5 shields the display mechanism after it descends.

[0033] The dust removal mechanism includes a base bracket 17, and the base bracket 17 is slidably arranged in the protective cavity 16 inside the protective outer frame 5, and the outer end of the base bracket 17 elastically slides through a guide slide bar 18, and the guide slide bar 18 is fixedly installed inside the protective outer frame 5, and the outer end of the base bracket 17 is symmetrically fixedly connected to the inner end of the guide steel cable 19; the inner end of the dust removal brush roller 7 included in the dust removal mechanism passes through the interior of the protective outer frame 5, and a chip removal guide groove 20 is provided at the penetration point between the protective outer frame 5 and the dust removal brush roller 7, and the chip removal guide groove 20 is used to scrape and clean the dust on the outside of the rotating dust removal brush roller 7.

[0034] The dust removal mechanism includes a dust removal brush roller 7 whose rotating shaft is wound and connected to the outer end of the guide steel cable 19, and the dust removal brush roller 7 is rotated by the tensioning and relaxing of the guide steel cable 19, and the rotating dust removal brush roller 7 is used to fit the main audio-visual display screen 3 and the auxiliary audio-visual display screen 301 to achieve dust removal and cleaning during the lifting process.

[0035] like Figures 8 - 12 As shown, during the process of the main audio-visual display screen 3 and the auxiliary audio-visual display screen 301 being lowered for storage and protection, the main audio-visual display screen 3 and the auxiliary audio-visual display screen 301 enter the protective cavity 16 opened inside the protective outer frame 5, and during the descending process, they synchronously descend against the bottom support bracket 17 slidingly arranged inside the protective cavity 16, and the bottom support bracket 17 drives the guide steel cable 19 at the end to be tensioned along the guide slide rod 18 arranged therethrough, so that the guide steel cable 19 drives the dust removal brush roller 7 wound at the outer end to rotate, so that the dust removal brush roller 7 can assist in cleaning sticky dust after being attached to the main audio-visual display screen 3 and the auxiliary audio-visual display screen 301, so as to avoid affecting the display effect of the advertising information.

[0036] like Figures 9 - 10 As shown, the dust removal brush roller 7 arranged on the outside of the protective outer frame 5 cleans the dust stuck on the main audio-visual display screen 3 and the auxiliary audio-visual display screen 301 during rotation, and the dust removal brush roller 7 carries the dust and rotates, and then collides with the chip removal guide groove 20 opened on the top of the protective outer frame 5, so as to assist in scraping off the dust stuck on the outside of the dust removal brush roller 7, so as to avoid dust accumulation affecting the efficiency of dust removal.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined expandable audio-visual advertising display mechanism, comprising a bearing base (1), and a lifting column (2) fixedly mounted at the center of the top surface of the bearing base (1); It is characterized in that Also includes: A display mechanism is arranged above the bearing base (1), and the display mechanism comprises a main audio-visual display screen (3) and a secondary audio-visual display screen (301), and an interactive bracket (4) is arranged inside the main audio-visual display screen (3) and the secondary audio-visual display screen (301); A protective mechanism is fixedly arranged at the center position of the top surface of the bearing base (1), and the protective mechanism includes a protective outer frame (5), and an intelligent controller (6) is fixedly installed at the center position of the front face of the protective outer frame (5); A dust removal mechanism is provided on the top of the protective mechanism, and the dust removal mechanism includes a dust removal brush roller (7), and the outer end of the dust removal brush roller (7) is mounted on the outside of the top surface of the protective outer frame (5) by means of a torsion spring and is rotatable at equal angles.

2. A combined extended audio-visual advertising display mechanism according to claim 1, characterized in that: A lifting screw (8) is provided at the inner center of the lifting column (2) via a bearing, and the top end of the lifting screw (8) is rotated by the control of a servo motor inside the lifting column (2), and lifting slide grooves (9) are provided at equal angles on the outside of the lifting column (2), and the lifting column (2) realizes the lifting demonstration operation of the display mechanism through the lifting slide grooves (9).

3. A combined extended audio-visual advertising display mechanism according to claim 2, characterized in that: The display mechanism comprises a positioning sleeve (10), and the positioning sleeve (10) is threadedly connected to the outer wall of the lifting screw (8) inside the lifting column (2), and the outside of the positioning sleeve (10) is fixedly connected to the inner end of the interactive bracket (4) arranged at an equal angle, and the middle part of the interactive bracket (4) slides through the lifting slot (9) provided on the outside of the lifting column (2).

4. The combined extended audio-visual advertising display mechanism according to claim 1, characterized in that: The main audio-visual display screen (3) included in the display mechanism is fixedly connected to the interactive support (4) inside, and the auxiliary audio-visual display screen (301) included in the display mechanism is movably connected to the interactive support (4) inside, and the main audio-visual display screen (3) and the outer ends of the auxiliary audio-visual display screens (301) on the left and right sides are rotatably connected via torsion springs, and a rotatable adaptive three-dimensional advertising display is formed between the main audio-visual display screen (3) and the auxiliary audio-visual display screen (301).

5. The combined extended audio-visual advertising display mechanism according to claim 4 is characterized by: The display mechanism comprises a driving shaft (11), and the driving shaft (11) is rotatably mounted inside the left and right interactive brackets (4) at the rear through bearings, and the tops of the left and right interactive brackets (4) are rotatably provided with transmission shafts (12) through bearings, and the outer ends of the transmission shafts (12) are meshedly connected to the top of the driving shaft (11) through a bevel gear set (13), and the bottom end of the left driving shaft (11) is fixedly connected to the top of the output shaft of the servo motor (15).

6. A combined extended audio-visual advertising display mechanism according to claim 5, characterized in that: The display mechanism comprises a traction steel cable (14), wherein the inner end of the traction steel cable (14) is wound around and connected to the upper outer wall of the left and right driving shafts (11), and the outer ends of the symmetrically arranged traction steel cables (14) are fixedly connected to the inner walls of the left and right auxiliary audio-visual display screens (301), and the auxiliary audio-visual display screens (301) are rotated at different angles to achieve a combined and partitioned advertising demonstration effect.

7. The combined extended audio-visual advertising display mechanism according to claim 1, characterized in that: The protective mechanism comprises a protective cavity (16), and the protective cavity (16) is opened inside the protective outer frame (5), and the protective outer frame (5) forms an internal hollow structure with an open top through the opened protective cavity (16), and the protective outer frame (5) is provided with a protective cover for the display mechanism after it is lowered.

8. The combined extended audio-visual advertising display mechanism according to claim 1, characterized in that: The dust removal mechanism comprises a bottom bracket (17), and the bottom bracket (17) is slidably arranged in a protective cavity (16) inside the protective outer frame (5), and the outer ends of the bottom bracket (17) are elastically slidably penetrated by a guide slide bar (18), and the guide slide bar (18) is fixedly installed inside the protective outer frame (5), and at the same time, the outer ends of the bottom bracket (17) are symmetrically fixedly connected to the inner ends of the guide steel cables (19).

9. A combined extended audio-visual advertising display mechanism according to claim 8, characterized in that: The inner end of the dust removal brush roller (7) included in the dust removal mechanism penetrates the interior of the protective outer frame (5), and a chip removal guide groove (20) is provided at the penetration point between the protective outer frame (5) and the dust removal brush roller (7), and the chip removal guide groove (20) is used to scrape and clean the dust on the outside of the rotating dust removal brush roller (7).

10. The combined extended audio-visual advertising display mechanism according to claim 1, characterized in that: The dust removal mechanism comprises a dust removal brush roller (7) whose rotating shaft is wound around the outer end of the guide steel cable (19), and the dust removal brush roller (7) is rotated by the tensioning and relaxing of the guide steel cable (19), and the rotating dust removal brush roller (7) is used to fit the main audio-visual display screen (3) and the auxiliary audio-visual display screen (301) to remove dust during the lifting process.

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