Folding outdoor advertising screen center shaft device

Abstract

The invention relates to the technical field of advertising screen center shafts, in particular to a folding outdoor advertising screen center shaft device which comprises a base, four fixing blocks are fixedly mounted on the outer wall of the base, a mounting plate is arranged above the base, the outer wall of the mounting plate and the four fixing blocks are fixedly connected into a whole, a ground inserting rod is arranged at the bottom end of the base, and the ground inserting rod is fixedly connected with the base. A stand column is fixedly installed at the top end of the base. The rotating drum rotates to drive a second gear ring and a stirring triangular plate to synchronously start to rotate, the gear ring can drive a balancing weight to move towards the left side of the base in the rotating process, and the situation that when a display screen is installed on a screen placing plate, the gravity center of the base moves forwards and topples due to the fact that the dead weight of the display screen is too large is avoided; a second gear ring can drive two screen placing plates to be unfolded in the rotating process, mounting of the display screen is facilitated, a stirring triangular plate synchronously rotates to push four translation plates to do translation motion to stretch out of translation grooves in the base and make contact with the ground, and higher stability strength is provided for the base.

Description

Technical Field

[0001] The invention relates to the technical field of central axes of advertising screens, and in particular to a central axis device of a foldable outdoor advertising screen. Background Art

[0002] As a display for playing advertisements, advertising screens can be placed by installing them at the desired location. In order to make more people notice the advertisements on the advertising screens, it is often necessary to place the advertising screens in outdoor locations with large traffic (such as squares, station entrances and exits, etc.). When placing the advertising screens outdoors, it is necessary to use the central axis device to temporarily install the advertising screens at the desired location for use.

[0003] During use, some existing central axis devices are installed in a position where the advertising screen is unfolded, and then the central axis device is placed in a desired position, and then the advertising screen is installed on the central axis device. Since most advertising screens are large, when the advertising screen is installed on the central axis device and temporarily used outdoors, due to the limited installation environment, it is often not allowed to drive expansion screws into the ground to fix the position of the central axis device. The display screen is supported by the bracket on the central axis device (such as a tripod bracket). However, when the flow of people is large, people will inevitably touch the advertising screen, and the bracket on the central axis device will easily shake, resulting in an unstable center of gravity and causing the advertising screen to fall over or be damaged. Summary of the invention

[0004] The purpose of the present invention is to provide a foldable outdoor advertising screen center axis device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A central axis device of a foldable outdoor advertising screen comprises a base, four fixed blocks are fixedly installed on the outer wall of the base, a mounting plate is provided above the base, the outer wall of the mounting plate is fixedly connected to the four fixed blocks as a whole, a ground-inserting rod is provided at the bottom end of the base, a column is fixedly installed at the top of the base, a rotating drum is movably mounted on the outer wall of the column, the rotating drum and the column both penetrate the mounting plate and extend to the top of the mounting plate, four toggle triangles, a gear ring and a second gear ring are fixedly installed on the outer wall of the rotating drum, a counterweight extension assembly is attached to the outer wall of the gear ring, and a display screen mounting assembly is also provided on the top of the mounting plate.

[0006] A ring is provided on the outer wall of the rotating drum, and two horizontal plates are provided on the outer wall of the ring. A fixed frame and an adsorption plate are provided on the top of the ring. A winding shaft is rotatably installed in the fixed frame, and a rainproof curtain is fixedly connected to the outer wall of the winding shaft, one side of the rainproof curtain is fixedly connected to the adsorption plate, and a conical cover is provided on the top of the column.

[0007] The display screen installation assembly comprises two rotating shafts, and the outer walls of the rotating shafts are provided with a screen placement plate and a linkage plate, and the side walls of the two linkage plates are movably fitted with a limiting plate.

[0008] A toothed disc is movably fitted on the outer wall of the second toothed ring, and a slide plate is movably fitted on the outer wall of the toothed disc. The slide plate is slidably mounted on the L-shaped connecting plate, and a mounting frame is fixedly connected to the L-shaped connecting plate. A mounting block is fixedly mounted on the top of the slide plate, and a pushing plate is arranged on the mounting block. A fixing column is also arranged on the L-shaped connecting plate, and a rotating ring is rotatably mounted on the outer wall of the fixing column, and a movable plate and a toggle plate are fixedly mounted on the outer wall of the rotating ring, and a second movable plate is arranged on the movable plate.

[0009] The counterweight extension assembly includes two L-shaped fixed platforms, each of which is slidably mounted with a sliding plate, the two sliding plates are commonly and fixedly connected with a counterweight block, and two toggle rods are fixedly mounted on the counterweight block.

[0010] Four translation grooves are arranged at the top of the base, and translation plates are slidably installed in the four translation grooves, and return springs are arranged in the four translation grooves, and both ends of the return springs are fixedly connected to the translation plates and the inner walls of the translation grooves, and a limit frame is movably mounted on the outer wall of the translation plate, and the four limit frames are fixedly installed at the top of the base, a bump is fixedly installed at the top of the translation plate, and a reinforcement component is fixedly installed on the translation plate away from the display screen mounting component.

[0011] The reinforcement assembly includes an arc-shaped plate fixedly mounted on a translation plate, a slide groove is provided at the top of the arc-shaped plate, and two movable plates are slidably mounted in the slide groove, weight blocks are fixedly mounted on the two movable plates, and vertical poles are fixedly mounted on the tops of the movable plates.

[0012] The reinforcement assembly also includes two additional blocks, on which a rotating rod is rotatably mounted, and on the outer walls of the rotating rod a touch plate and a bonding plate are fixedly mounted.

[0013] Two positioning blocks are fixedly installed on the arc-shaped plate, and linkage rotating plates and pressing plates are arranged on the positioning blocks, and reinforcing plates are fixedly installed on the bottom ends of the pressing plates.

[0014] Two reinforcement grooves are arranged on the outer wall of the base, the width of the two reinforcement grooves is the same as the width of the pressure plate, and baffles are fixedly installed on the inner walls of the bottom ends of the reinforcement grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention drives the gear ring, the second gear ring, and the toggle triangle plate to start rotating synchronously through the rotation of the rotating drum. The gear ring will drive the counterweight block to move to the left side of the base during the rotation process, so as to avoid the base from tipping over due to the excessive weight of the display screen when the display screen is installed on the screen-mounted plate and causing the center of gravity of the base to move forward. The second gear ring will unfold the two screen-mounted plates during the rotation process to facilitate the installation of the display screen, and the synchronous rotation of the four toggle triangle plates will push the four translation plates to translate and extend out of the translation slots on the base and contact the ground, thereby providing higher stability strength for the base and preventing it from tipping over.

[0016] During the movement of the counterweight block, the lever is pushed to move the rotating lever, the touch plate, and the bonding plate, so that the bonding plate can push the vertical pole, the movable plate, and the weight block to move and make the weight block contact the ground. By relying on the counterweight block and the weight block to counterweight multiple locations of the base and providing support through the weight block, it is avoided that during the installation process, due to improper operation of the staff, one side of the screen-mounting plate is subjected to excessive force when the display screen is installed on the two screen-mounting plates, causing the base to tip to the side where the counterweight block or screen-mounting plate is not installed.

[0017] The second gear ring is driven to rotate by the rotating drum, and the second gear ring drives the slide plate to move during the rotation process. During the movement of the slide plate, a linkage plate is pushed to rotate by the mounting block and the pushing plate, so that a screen plate is unfolded, and contacts the toggle plate during the continuous movement of the slide plate, driving the toggle plate, the rotating ring, the movable plate, and the second movable plate to rotate, and the other screen plate will be unfolded immediately. That is, the stability of the base will be increased during the rotation of the rotating drum and the two screen plates in the display screen mounting assembly will be opened.

[0018] During the rotation of the drum, the adsorption plate can be driven to rotate and fit with the front end surface of the fixed frame. At this time, the rainproof curtain will be supported and opened by the fixed frame, the adsorption plate and the cross plate, so that the rainproof curtain can provide protection. At this time, the adsorption plate made of magnets is located on the side of the base away from the display screen, that is, at the top of the counterweight block, thereby increasing the stability of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of the rainproof curtain of the present invention.

[0021] Figure 3 It is a schematic diagram of the local structure of the present invention.

[0022] Figure 4 It is a schematic diagram of the rotary drum structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the display screen installation assembly of the present invention.

[0024] Figure 6For the present invention Figure 4 A schematic diagram of the enlarged structure in FIG.

[0025] Figure 7 It is a schematic diagram of the structure of the counterweight extension assembly of the present invention.

[0026] Figure 8 It is a schematic diagram of the base structure of the present invention.

[0027] Fig. 9 It is a schematic diagram of the translation plate structure of the present invention.

[0028] Fig.10 For the present invention Fig. 9 Schematic diagram of the structure at point B in the figure.

[0029] Fig.11 It is a schematic diagram of the structure of the reinforcement component of the present invention.

[0030] Fig.12 It is a schematic diagram of the local structure of the reinforcement component of the present invention.

[0031] Fig.13 It is a schematic diagram of the pressing plate structure of the present invention.

[0032] In the figure: 1, base; 2, fixed block; 3, mounting plate; 4, ground rod; 5, column; 6, rotating drum; 7, toothed ring; 8, second toothed ring; 9, counterweight extension assembly; 10, display screen mounting assembly; 11, sleeve ring; 12, horizontal plate; 13, fixed frame; 14, reel; 15, adsorption plate; 16, rain curtain; 17, cone cover; 18, rotating shaft; 19, screen plate; 20, limit plate; 21, linkage plate; 22, toothed disc; 23, mounting frame; 24, L-shaped connecting plate; 25, slide plate; 26, mounting block; 27, push plate; 28, fixed column; 29, rotating ring; 3 0. Toggle plate; 31. Movable plate; 32. Second movable plate; 33. L-shaped fixed platform; 34. Sliding plate; 35. Counterweight; 36. Toggle rod; 37. Toggle triangle plate; 38. Translation groove; 39. Translation plate; 40. Return spring; 41. Limiting frame; 42. Bump; 43. Reinforcement assembly; 44. Arc plate; 45. Moving plate; 46. Weight block; 47. Vertical pole; 48. Additional block; 49. Rotating rod; 50. Touch plate; 51. Laminating plate; 52. Positioning block; 53. Linkage rotating plate; 54. Pressing plate; 55. Reinforcement plate; 56. Reinforcement groove; 57. Baffle. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 13 The present invention provides a technical solution: a foldable outdoor advertising screen central axis device, including a base 1, such as Figure 1-Figure 6As shown in the figure, a threaded hole is provided at the bottom end of the base 1, and a ground insertion rod 4 is provided in the threaded hole, and a thread matching the threaded hole at the bottom end of the base 1 is provided on the outer wall of the ground insertion rod 4, so that when the central axis device is used in an environment where the ground insertion rod 4 can be inserted into the ground, the ground insertion rod 4 can be inserted into the ground, thereby increasing the overall stability of the central axis device. Four fixing blocks 2 are fixedly installed on the outer wall of the base 1, a mounting plate 3 is provided directly above the base 1, and the outer wall of the mounting plate 3 is fixedly connected to the four fixing blocks 2, that is, the mounting plate 3 and the base 1 are connected as a whole through the four fixing blocks 2, and a through hole is provided at the center position of the mounting plate 3, and a column 5 is provided in the through hole, the bottom end of the column 5 is fixedly connected to the base 1, and a rotating drum 6 is movably sleeved on the outer wall of the column 5, and the outer circle of the rotating drum 6 is straight The diameter size is the same as the diameter size of the through hole on the mounting plate 3, that is, the rotating drum 6 can rotate on the outer wall of the column 5, and the outer wall of the rotating drum 6 is fixedly installed with a gear ring 7 and a second gear ring 8, and the second gear ring 8 is located above the gear ring 7, and a counterweight extension component 9 is movably fitted on the outer wall of the gear ring 7. A mounting frame 23 is fixedly installed on the top of the mounting plate 3, and the top of the mounting frame 23 is provided with two grooves matching the diameter size of the rotating shaft 18. A display screen mounting component 10 is provided on the top of the mounting frame 23, and an L-shaped connecting plate 24 is fixedly installed on the left side of the mounting frame 23, and a slide plate 25 is provided on the top of the L-shaped connecting plate 24, and a slide groove is provided at the bottom end of the slide groove. The width size of the slide groove is the same as the width size of the vertical plate of the L-shaped connecting plate 24, ensuring that the slide plate 2 The top of the L-shaped connecting plate 24 can be translated, and a mounting block 26 is fixedly installed on the top of the slide plate 25, and a groove is provided on the right side wall of the mounting block 26, and a push plate 27 is slidably installed in the groove, and the left side of the push plate 27 is connected to the inner wall of the groove on the mounting block 26 by a spring, and the push plate 27 can be pushed and slid out of the groove on the mounting block 26 by the spring, and a fixed column 28 is also fixedly installed on the L-shaped connecting plate 24, and the fixed column 28 is located behind the slide plate 25, and a rotating ring 29 is rotatably installed on the outer wall of the fixed column 28, and a toggle plate 30 is fixedly installed on the left side wall of the rotating ring 29, and a movable plate 31 is fixedly installed on the right side wall of the rotating ring 29, and a groove is provided on the right side wall of the movable plate 31 The second movable plate 32 is slidably installed in the groove, the left side of the second movable plate 32 is connected to the inner wall of the groove on the movable plate 31 by a spring, and a toothed disc 22 is provided between the left side of the slide plate 25 and the second gear ring 8, the toothed disc 22 is composed of a support rod and a rotating disc, the rotating disc is rotatably installed on the outer wall of the support rod and is at the same horizontal height as the second gear ring 8, and the bottom end of the support rod is fixedly connected to the mounting plate 3, one of the components of the toothed disc 22, the rotating disc, the outer wall of the second gear ring 8 and the left side wall of the slide plate 25 are all provided with a plurality of teeth that can mesh with each other, so that during the rotation of the rotating drum 6, the second gear ring 8 and the toothed disc 22 are driven to rotate, and the slide plate 25 is driven to translate at the top end of the L-shaped connecting plate 24 through the toothed disc 22 during the rotation process, See also Figure 1-Figure 2 The top of the column 5 is fixedly installed with a conical cover 17, and the top of the outer wall of the rotating drum 6 is rotatably sleeved with a collar 11 to prevent the rotating drum 6 from driving the collar 11 to rotate during the rotation process. Two horizontal plates 12 are fixedly installed on the outer wall of the collar 11. Both horizontal plates 12 are provided with through holes that match the diameter of the rotating shaft 18. By inserting the two rotating shafts 18 into the through holes, it can be ensured that the rotating shaft 18 can rotate. The top of the collar 11 is movably fitted with a fixed frame 13 and an adsorption plate 15, and the adsorption plate 15 is fixed to the top of the rotating drum 6. The fixed frame 13 is fixedly mounted on the outer wall of the column 5, a winding shaft 14 is arranged inside the fixed frame 13, the winding shaft 14 and the fixed frame 13 are rotationally connected via a spiral spring, a rainproof curtain 16 is connected to the outer wall of the winding shaft 14, one side of the rainproof curtain 16 is fixedly connected to the adsorption plate 15, and the adsorption plate 15 is made of an iron block, a magnet is arranged on the side wall of the front end surface of the fixed frame 13, during the rotation of the drum 6, the adsorption plate 15 can be driven to rotate and fit with the front end surface of the fixed frame 13, so that the rainproof curtain 16 can provide protection.

[0035] The display screen mounting assembly 10 includes two rotating shafts 18, and the two rotating shafts 18 are inserted into the grooves on the mounting frame 23 and into the through holes on the horizontal plate 12 to be vertically mounted on the mounting frame 23. A screen-mounting plate 19 is provided on the side of the two rotating shafts 18 that are away from each other. The screen-mounting plate 19 is provided with a plurality of insertion slots. By inserting the buckles on the display screen into the insertion slots, the display screen can be easily installed. A linkage plate 21 is fixedly installed on the left side of the two rotating shafts 18, and a limiting plate 20 is provided between the screen-mounting plate 19 and the linkage plate 21 located on the same rotating shaft 18. The limiting plate 20 does not contact the rotating shaft 18 and is fixedly mounted on the top of the mounting frame 23. During the rotation of the rotating shaft 18, the screen-mounting plate 19 is driven to fit to the right side of the limiting plate 20, that is, the two screen-mounting plates 19 are completely unfolded, and the display screen can be installed. The two display screens can be folded together by rotating the rotating shaft 18, which can reduce the occupied area when the central axis device is not in use.

[0036] The second gear ring 8 and the gear plate 22 are driven to rotate by the rotation of the rotating drum 6, and the gear plate 22 drives the slide plate 25 to translate at the top of the L-shaped connecting plate 24. During the movement of the slide plate 25, the mounting block 26 will first contact a linkage plate 21, and the linkage plate 21 drives the rotating shaft 18 and the screen plate 19 to rotate and is continuously pushed by the pushing plate 27 and contacts with the limiting plate 20 and stops moving. During the continuous movement of the slide plate 25, it will contact the toggle plate 30, and the toggle plate 30 drives the rotating ring 29 and the movable plate 31 to rotate. The movable plate 31 and the second movable plate 32 toggle another linkage plate 21 to rotate through the rotating shaft 18, so that the other screen plate 19 contacts with the other limiting plate 20, and the two screen plates 19 are completely unfolded to facilitate the installation of the display screen.

[0037] See also Figure 7 The counterweight extension assembly 9 includes two L-shaped fixed platforms 33, each of which is fixedly mounted on the top of the mounting plate 3. A sliding plate 34 is provided on the side of the two L-shaped fixed platforms 33 that are close to each other, and a sliding groove matching the L-shaped fixed platform 33 is provided on the side of the two sliding plates 34 that are away from each other. A side plate of one side of the L-shaped fixed platform 33 extends into the sliding groove on the sliding plate 34, which can ensure that the two sliding plates 34 can slide horizontally on the L-shaped fixed platform 33. The left sides of the two sliding plates 34 are connected to the counterweight. The weight block 35 and the counterweight block 35 can be made of an iron block to increase its own weight. Two toggle rods 36 are provided on the left side of the counterweight block 35, and the rear back side of the sliding plate 34 close to the front end face of the base 1 is in contact with the gear ring 7. A plurality of mutually meshing teeth are provided on the rear back side wall of the sliding plate 34 and the outer wall of the gear ring 7, which can facilitate the sliding plate 34 and the counterweight block 35 to move to the left side of the base 1 when the gear ring 7 rotates with the rotating drum 6, so as to avoid the overall center of gravity of the central axis device from moving forward after the display screen is installed.

[0038] See also Figure 8-Figure 13 The top of the base 1 is provided with four translation grooves 38, and translation plates 39 are slidably installed in the four translation grooves 38. The translation plates 39 are connected to the inner walls of the translation grooves 38 by reset springs 40, and the tops of the translation plates 39 are fixedly installed with protrusions 42. The tops of the translation plates 39 are movably fitted with limit frames 41, and the limit frames 41 are fixedly installed on the top of the base 1. The limit frames 41 are provided with a plurality of slots, and the protrusions 42 are provided with a plurality of blocks. Four toggle triangles 37 are fixedly installed on the outer wall of the rotating drum 6. The tops of the four toggle triangles 37 are on the same horizontal line as the tops of the translation plates 39. The four toggle triangles 37 are driven to rotate by the rotating drum 6, and the toggle triangles During the rotation process, the plate 37 drives the four translation plates 39 to translate in the translation groove 38, and during the continuous movement of the translation plate 39, the protrusion 42 is driven to fit the limit frame 41, and the position of the translation plate 39 can be fixed by inserting the block on the protrusion 42 into the slot on the limit frame 41. The translation plate 39 is L-shaped, that is, the bottom end of the side wall of the translation plate 39 extending out of the translation groove 38 is in the same horizontal plane as the bottom end of the base 1, so that during use, the overall stability of the base 1 can be increased by extending the translation plate 39 to the outside of the base 1 to prevent the base 1 from tipping over easily when the display screen is installed, and a reinforcement component 43 is installed on the left side of the translation plate 39 located on the left side of the base 1.

[0039] The reinforcement assembly 43 includes an arc-shaped plate 44 fixedly mounted on the translation plate 39, a slide groove is provided at the top of the arc-shaped plate 44, and two movable plates 45 are slidably mounted in the slide groove, and weight blocks 46 are fixedly mounted on the two arc-shaped plates 44, and the weight blocks 46 are made of iron blocks, and the bottom ends of the weight blocks 46 are in the same horizontal line as the bottom ends of the base 1, so as to facilitate the bottom ends of the weight blocks 46 to fit the ground to provide support for the base 1, and a T-shaped slide groove is provided at the bottom end of the movable plate 45, and two T-blocks are slidably mounted in the T-shaped slide groove, and the short heads of the T-blocks are downward and fixedly connected to the inner walls of the bottom ends of the slide grooves on the arc-shaped plates 44, and the T-blocks can be used to prevent the movable plates 45 from detaching from the slide grooves on the arc-shaped plates 44, and vertical poles 47 are fixedly mounted on the top ends of the two movable plates 45.

[0040] The reinforcement assembly 43 also includes two additional blocks 48 fixedly mounted on the translation plate 39. The additional blocks 48 are each provided with a through hole. A rotating rod 49 is rotatably mounted in the through holes on the two additional blocks 48. A touch plate 50 and a positioning block 52 are fixedly mounted on the outer wall of the rotating rod 49. The positioning block 52 is located at the bottom end of the additional block 48 and is at the same height as the vertical rod 47. The touch plate 50 is located at the top end of the additional block 48 and is located within the movable range of the toggle rod 36. During the rotation of the rotating rod 49, the bonding plate 51 is driven to rotate and the vertical rod 47 is toggled, so that the vertical rod 47 can push the movable plate 45 and the weight block 46 to move. The sum of the overall lengths of the two touch plates 50 is less than the spacing between the two rotating rods 49 to avoid the two touch plates 50 being too long and conflicting with each other during the rotation process and being unable to continue rotating.

[0041] Two positioning blocks 52 are fixedly installed on the side wall of the arc plate 44 close to the base 1. The top of the positioning blocks 52 is provided with a groove, and a mounting shaft is rotatably installed in the groove. A pressing plate 54 is fixedly installed on the right side wall of the mounting shaft, and a reinforcing plate 55 is fixedly installed on the bottom end of the pressing plate 54. A linkage rotating plate 53 is fixedly installed on the top of the mounting shaft. The linkage rotating plate 53 is located within the rotation range of the bonding plate 51, and two reinforcing grooves 56 are provided on the left side wall of the base 1. The width of the reinforcing groove 56 is the same as that of the pressing plate 54. The pressing plate 54 extends into the reinforcing groove 56, and a baffle 57 is fixedly installed on the inner wall of the bottom end of the reinforcing groove 56. The right side wall of the baffle 57 and the bottom end of the reinforcing plate 55 are both inclined surfaces, which are convenient for the baffle 57 and the reinforcing plate 55 to be fully fitted together, and when the base 1 is tilted upward, the baffle 57 and the reinforcing plate 55 can still be tightly fitted together.

[0042] The counterweight block 35 and the toggle rod 36 are driven to move to the left side by rotating the rotating drum 6. During the movement, the toggle rod 36 contacts the touch plate 50, and the rotating rod 49 and the bonding plate 51 are driven to rotate by the touch plate 50. During the rotation of the bonding plate 51, the vertical rod 47, the moving plate 45 and the weight block 46 are pushed to move, thereby increasing the stability of the base 1. When the bonding plate 51 is out of contact with the vertical rod 47, it contacts the linkage rotating plate 53. During the rotation of the linkage rotating plate 53, the pressing plate 54 and the reinforcement plate 54 are driven to rotate. The plate 55 rotates to make the pressure plate 54 fit the inner wall of the bottom end of the reinforcement groove 56 on the base 1. At this time, the baffle plate 57 will fit with the reinforcement plate 55. The arc plate 44 not only prevents the base 1 from tipping backward after the display screen is installed, but also the pressure plate 54 enters the reinforcement groove 56 and fits the inner wall of the bottom end of the reinforcement groove 56, which can limit the continued rotation of the fitting plate 51, and fits with the reinforcement plate 55 through the baffle plate 57, which can avoid relying solely on the translation plate 39 to provide support for the reinforcement component 43, resulting in loosening during long-term use.

[0043] When the present invention is in use, after the base 1 is placed in the desired position, the rotating drum 6 is manually controlled to rotate. During the rotation of the rotating drum 6, the toggle triangle plate 37 will rotate with it and push the four translation plates 39 out of the translation slot 38. When the toggle triangle plate 37 breaks contact with the translation plate 39, the protrusion 42 will be fixed on the limit frame 41 through the card block into the card slot, and the rotating drum 6 will drive the gear ring 7 to rotate during the rotation of the rotating drum 6. The gear ring 7 drives the sliding plate 34 to translate on the L-shaped fixed platform 33, so that the counterweight block 35 can move to the left side of the base 1, and the toggle rod 36 on the counterweight block 35 pushes the touch plate 50, the rotating rod 49, and the bonding plate 51 to rotate, and the bonding plate 51 will push the vertical rod 47, the moving plate 45, and the weight block 46 to move, and when the bonding plate 51 breaks contact with the vertical rod 47 and continues to move, it contacts the linkage. The rotating plate 53 allows the pressure plate 54 to enter the reinforcement groove 56 and fit the reinforcement plate 55 with the baffle 57. At this time, the second gear ring 8 rotates synchronously, and drives the gear plate 22 and the slide plate 25 to start moving synchronously. The slide plate 25 will make the mounting block 26 contact a linkage plate 21 during the movement. The linkage plate 21 drives the rotating shaft 18 and the screen plate 19 to rotate and is continuously pushed by the pushing plate 27 and contacts with the limit plate 20 and stops moving. In the process of continuous movement of the slide plate 25, it will contact the toggle plate 30. The toggle plate 30 drives the rotating ring 29 and the movable plate 31 to rotate. The movable plate 31 and the second movable plate 32 toggle another linkage plate 21 to rotate through the rotating shaft 18, so that the other screen plate 19 contacts with the other limit plate 20. The two screen plates 19 are completely unfolded, and the display screen can be installed on the two screen plates 19.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foldable outdoor advertising screen central axis device, comprising a base (1), characterized in that: Four fixed blocks (2) are fixedly mounted on the outer wall of the base (1); a mounting plate (3) is provided above the base (1); the outer wall of the mounting plate (3) is fixedly connected to the four fixed blocks (2) to form a whole; a ground insertion rod (4) is provided at the bottom end of the base (1); a column (5) is fixedly mounted on the top of the base (1); a rotating drum (6) is movably mounted on the outer wall of the column (5); the rotating drum (6) and the column (5) both penetrate the mounting plate (3) and extend to the top of the mounting plate (3); four toggle triangles (37), a toothed ring (7), and a second toothed ring (8) are fixedly mounted on the outer wall of the rotating drum (6); a counterweight extension assembly (9) is attached to the outer wall of the toothed ring (7); and a display screen mounting assembly (10) is also provided on the top of the mounting plate (3).

2. The central axis device of a foldable outdoor advertising screen according to claim 1 is characterized by: A sleeve (11) is provided on the outer wall of the rotating drum (6), two horizontal plates (12) are provided on the outer wall of the sleeve (11), a fixing frame (13) and an adsorption plate (15) are provided at the top of the sleeve (11), a reel (14) is rotatably mounted in the fixing frame (13), and a rainproof curtain (16) is fixedly connected to the outer wall of the reel (14), one side of the rainproof curtain (16) is fixedly connected to the adsorption plate (15), and a conical cover (17) is provided at the top of the column (5).

3. The central axis device of a foldable outdoor advertising screen according to claim 1 is characterized by: The display screen mounting assembly (10) comprises two rotating shafts (18), the outer walls of the rotating shafts (18) are provided with a screen placement plate (19) and a linkage plate (21), and the side walls of the two linkage plates (21) are movably fitted with a limit plate (20).

4. The central axis device of a foldable outdoor advertising screen according to claim 1 is characterized by: A toothed disc (22) is movably fitted on the outer wall of the second toothed ring (8), a slide plate (25) is movably fitted on the outer wall of the toothed disc (22), the slide plate (25) is slidably mounted on an L-shaped connecting plate (24), a mounting frame (23) is fixedly connected to the L-shaped connecting plate (24), a mounting block (26) is fixedly mounted on the top of the slide plate (25), a pushing plate (27) is provided on the mounting block (26), a fixing column (28) is further provided on the L-shaped connecting plate (24), a rotating ring (29) is rotatably mounted on the outer wall of the fixing column (28), a movable plate (31) and a toggle plate (30) are fixedly mounted on the outer wall of the rotating ring (29), and a second movable plate (32) is provided on the movable plate (31).

5. The central axis device of a foldable outdoor advertising screen according to claim 1 is characterized by: The counterweight extension assembly (9) comprises two L-shaped fixed platforms (33), each of the two L-shaped fixed platforms (33) being slidably mounted with a sliding plate (34), the two sliding plates (34) being commonly and fixedly connected with a counterweight block (35), and two toggle rods (36) being fixedly mounted on the counterweight block (35).

6. The central axis device of a foldable outdoor advertising screen according to claim 1 is characterized by: The top of the base (1) is provided with four translation grooves (38), and a translation plate (39) is slidably installed in each of the four translation grooves (38). A return spring (40) is provided in each of the four translation grooves (38), and both ends of the return spring (40) are fixedly connected to the translation plate (39) and the inner wall of the translation groove (38). A limit frame (41) is movably mounted on the outer wall of the translation plate (39), and the four limit frames (41) are fixedly installed on the top of the base (1). A protrusion (42) is fixedly installed on the top of the translation plate (39), and a reinforcement component (43) is fixedly installed on the translation plate (39) away from the display screen mounting component (10).

7. The central axis device of a foldable outdoor advertising screen according to claim 6 is characterized by: The reinforcement assembly (43) comprises an arc-shaped plate (44) fixedly mounted on the translation plate (39), a slide groove being provided at the top end of the arc-shaped plate (44), and two movable plates (45) being slidably mounted in the slide groove, a weight block (46) being fixedly mounted on each of the two movable plates (45), and a vertical rod (47) being fixedly mounted on the top end of each of the movable plates (45).

8. The central axis device of a foldable outdoor advertising screen according to claim 6 is characterized by: The reinforcement assembly (43) further comprises two additional blocks (48), on which a rotating rod (49) is rotatably mounted, and on the outer walls of the rotating rods (49) a touch plate (50) and a bonding plate (51) are fixedly mounted.

9. The central axis device of a foldable outdoor advertising screen according to claim 7, characterized in that: Two positioning blocks (52) are fixedly mounted on the arc-shaped plate (44), and a linkage rotating plate (53) and a pressing plate (54) are provided on the positioning blocks (52), and a reinforcing plate (55) is fixedly mounted on the bottom end of each pressing plate (54).

10. The central axis device of a foldable outdoor advertising screen according to claim 1, characterized in that: Two reinforcement grooves (56) are provided on the outer wall of the base (1), the width of the two reinforcement grooves (56) is the same as the width of the pressure plate (54), and baffles (57) are fixedly mounted on the inner walls of the bottom ends of the reinforcement grooves (56).

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