A smart street lamp with a roll-up advertising device

Abstract

The present invention relates to the technical field of smart street lamps, and discloses a smart street lamp with a roll-up advertising device, comprising a base, a lamp pole mounted on the inner side of the base, a light box mounted on the outer wall of the lamp pole, and an advertising curtain body detachably mounted in the light box, wherein a first magnetic block is slidingly mounted on the inner side wall of the light box, a second magnetic block is mounted on one side of the first magnetic block, and the second magnetic block is magnetically attracted to the first magnetic block. The smart street lamp with a roll-up advertising device inserts the bottom edge of the advertising curtain body into the gap between the first magnetic block and the second magnetic block, utilizes the magnetic attraction between the first magnetic block and the second magnetic block to generate a stable clamping force, and reduces residual wrinkles after unwinding, and the C-shaped block can further limit and fix the bottom edge of the advertising curtain body. When the advertising curtain body is affected by wind and swings, the C-shaped block can prevent it from swinging significantly, reducing the possibility of the advertising curtain body and the light box colliding.

Description

Technical Field

[0001] The present invention relates to the technical field of smart street lamps, and in particular to a smart street lamp with a roll-up advertising device. Background Art

[0002] Amidst the surge of digitalization, traditional fixed advertising formats are gradually exposing their limitations in smart streetlight applications. Fixed ads are difficult to modify after installation, lack flexibility to adapt to changing promotional cycles, and lack appeal due to their monotonous format. Against this backdrop, roll-up ads have emerged. With their unique advantages, they offer a new solution for smart streetlight advertising, becoming an innovative option to meet the needs of modern advertising and urban development.

[0003] After searching, it was found that the Chinese patent with publication number CN118757756A discloses a smart street lamp with a retractable advertising device. By setting a drive component and a retractable and unreeling component, the replacement of the advertising screen becomes extremely convenient. The advertising screen can be quickly installed, retracted, unreeled and replaced simply by rotating the wheel. This not only improves work efficiency but also reduces maintenance costs, providing great convenience for advertisers. In addition, during the installation process, workers do not need to work at high altitudes, reducing the risks during operation.

[0004] In actual application of the above-mentioned existing technology, the advertising curtain is unfolded by its own gravity after being unrolled. However, due to the variety of materials of advertising curtains (such as common PVC, non-woven fabrics, etc.), the softness and thickness of curtains of different materials are different. For example, the thicker PVC curtain cannot easily overcome its internal stress under its own gravity, resulting in wrinkles remaining after unrolling. In addition, in outdoor environments, the wind force and direction are unstable. A breeze may cause the curtain to swing, making it difficult to naturally droop and flatten. Strong winds may cause the curtain to shake violently and hit the light box, which will not only prevent it from being flattened, but may also cause the curtain to tear, break, or even fall off the winding device, posing a safety hazard. Summary of the Invention

[0005] Technical problems solved

[0006] In response to the above-mentioned shortcomings of the prior art, the present invention provides a smart street lamp with a roll-up advertising device, which can effectively solve the problem in the prior art that the advertising curtain is not easy to flatten and position after being unrolled due to the influence of itself or external factors.

[0007] Technical Solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] The present invention provides a smart street lamp with a retractable advertising device, comprising a base, a lamp pole mounted on the inner side of the base, a light box disposed on the outer wall of the lamp pole, and an advertising screen body detachably mounted within the light box. The smart street lamp is characterized in that a first magnetic block is slidably disposed on the inner side wall of the light box, a second magnetic block is disposed on one side of the first magnetic block, and the second magnetic block is magnetically attracted to the first magnetic block, and a gap is provided between the first magnetic block and the second magnetic block for inserting the bottom edge of the advertising screen body;

[0010] Two C-shaped blocks are arranged on the inner bottom wall of the light box, and the openings of the two C-shaped blocks are arranged opposite to each other.

[0011] Furthermore, a lifting mechanism is provided between the base and the lamp pole, an arc block is integrally formed on the top of the base, a mounting bracket is provided on the inner bottom wall of the light box, a moving rod is linearly slidably provided in the mounting bracket, the second magnetic block is fixedly sleeved on one end of the moving rod, and the end of the moving rod away from the second magnetic block is provided as an arc surface.

[0012] Furthermore, the sliding path of the movable rod is perpendicular to the sliding path of the first magnetic block, a positioning ring is provided at one end of the movable rod away from the second magnetic block, and a first reset member is connected between an outer wall of the positioning ring and an outer wall of the mounting frame;

[0013] When the end of the moving rod does not contact the arc block, the first restoring member is in a natural state.

[0014] Furthermore, the inner cavity of the light box is provided with a fixed roller for installing the advertising curtain body, one end of the fixed roller is provided with a vertical groove, a limit block is slidably provided in the vertical groove, and a second reset part is connected between the outer wall of the limit block and the inner wall of the fixed roller.

[0015] Furthermore, a lubrication mechanism is provided on the side of the second magnetic block away from the first magnetic block. The lubrication mechanism includes a liquid storage box provided in the inner cavity of the light box for storing lubricating liquid. A liquid storage cylinder is provided on the top of the liquid storage box, and a liquid outlet pipe is provided on the outer wall of the liquid storage cylinder.

[0016] Furthermore, a piston rod is slidably installed in the liquid storage cylinder, and the diameter of the piston rod is adapted to the inner diameter of the liquid storage cylinder. The tail end of the piston rod is connected to one end of the moving rod through a connecting block, and a horizontal sliding groove for the connecting block to move is opened on the wall of the liquid storage cylinder.

[0017] A one-way liquid inlet valve is provided between the liquid storage box and the liquid storage cylinder, and a one-way liquid outlet valve is provided on the liquid outlet pipe.

[0018] Furthermore, a liquid adding port is provided on the wall of the liquid storage box, and a sealing plug is provided on the liquid adding port.

[0019] Furthermore, the lifting mechanism includes a screw rod rotatably arranged in the inner cavity of the base through a bearing, a limiting hole adapted to the shape of the lamp pole is opened on the top of the base, an internal thread is provided on the inner side of the lamp pole, and the lamp pole thread is installed on the surface of the screw rod.

[0020] Furthermore, the end of the liquid outlet pipe away from the liquid storage cylinder extends to the internal thread surface of the lamp pole;

[0021] When the lamp pole moves downward through the screw rod, the liquid outlet pipe can transport the lubricating liquid in the liquid storage cylinder to the internal thread of the lamp pole to lubricate the threaded connection between the screw rod and the lamp pole.

[0022] In this invention, the bottom edge of the advertising screen is inserted into the gap between the first and second magnetic blocks, leveraging the magnetic attraction between the first and second blocks to generate a stable clamping force. This clamping method applies uniform tension to the screen, reducing residual wrinkles after unwinding. The C-shaped blocks further limit and secure the bottom edge of the screen. When the screen swings in the wind, the C-shaped blocks prevent significant swaying, limiting horizontal displacement and reducing the possibility of collisions between the screen and the light box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0024] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 2 Schematic diagram of the cross-sectional structure of a light box according to an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of the structure of the second magnetic block according to an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the cross-sectional structure of the first magnetic block according to an embodiment of the present invention;

[0028] Figure 5 Schematic diagram of the cross-sectional structure of a fixed roller according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic structural diagram of a liquid storage box according to an embodiment of the present invention;

[0030] Figure 7Schematic diagram of the cross-section structure of the liquid storage cylinder according to an embodiment of the present invention;

[0031] Figure 8 It is a schematic cross-sectional structural diagram of the base according to an embodiment of the present invention.

[0032] The numbers in the figure represent: 1. base; 2. lamp pole; 3. light box; 4. advertising screen body; 5. first magnetic block; 6. second magnetic block; 7. C-shaped block; 8. arc block; 9. mounting bracket; 10. moving rod; 11. positioning ring; 12. first reset member; 13. fixed roller; 14. limit block; 15. second reset member; 16. liquid storage box; 17. liquid storage cylinder; 18. liquid outlet pipe; 19. piston rod; 20. one-way liquid inlet valve; 21. one-way liquid outlet valve; 22. liquid filling port; 23. screw. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] The present invention will be further described below with reference to the embodiments.

[0035] Example 1, with reference to Figure 1 - Figure 5 , which is the first embodiment of the present invention, provides a smart street lamp with a roll-up advertising device, including a base 1, a lamp pole 2 that is liftably installed on the inner side of the base 1, a light box 3 that is welded or fixedly installed on the outer wall of the lamp pole 2, and an advertising screen body 4 that is detachably installed in the light box 3. The side walls of the light box 3 are equipped with side panels that are rotated by torsion springs to facilitate the later replacement of the advertising screen body 4.

[0036] Since the advertising screen body 4 is made of various materials (such as common PVC, non-woven fabrics, etc.), the softness and thickness of screens made of different materials are different. For example, the thicker PVC screen cannot overcome its internal stress under its own gravity, resulting in wrinkles remaining easily after unwinding. In addition, in outdoor environments, the wind force and direction are unstable, and a breeze will cause the screen to swing, making it difficult to naturally droop and flatten. Strong winds may cause the advertising screen body 4 to shake violently and hit the light box 3, which will not only prevent it from being flattened, but may also cause the advertising screen body 4 to tear, break, or even fall off from the light box 3, posing a safety hazard.

[0037] Reference Figure 2 and Figure 3A first magnetic block 5 is linearly slidably installed on the inner wall of the light box 3, a second magnetic block 6 is provided on one side of the first magnetic block 5, and the second magnetic block 6 is magnetically attracted to the first magnetic block 5, and a gap is provided between the first magnetic block 5 and the second magnetic block 6 for inserting the bottom edge of the advertising curtain body 4; two C-shaped blocks 7 are welded or fixedly installed on the inner bottom wall of the light box 3, and the openings of the two C-shaped blocks 7 are opposite to each other.

[0038] Specifically, the bottom edge of the advertising screen body 4 is inserted into the gap between the first magnetic block 5 and the second magnetic block 6, and the magnetic attraction between the first magnetic block 5 and the second magnetic block 6 is utilized to generate a stable clamping force. This clamping method can apply uniform tension to the advertising screen body 4, overcome the internal stress of screens of different materials, and reduce residual wrinkles after unwinding. The C-shaped block 7 can further limit and fix the bottom edge of the advertising screen body 4. When the advertising screen body 4 swings due to the influence of wind, the C-shaped block 7 can prevent it from shaking significantly, limit the horizontal displacement of the advertising screen body 4, and reduce the possibility of the advertising screen body 4 and the light box 3 from slapping and colliding. Compared with relying on the screen's own gravity to flatten, the clamping force of the magnetic blocks is more stable and is not affected by the screen material and uneven gravity distribution, ensuring that the advertising screen body 4 can remain flat and enhance the advertising display effect.

[0039] Reference Figure 2 and Figure 3 A lifting mechanism is installed between the base 1 and the lamp pole 2. The top of the base 1 is integrally connected with an arc block 8. A mounting bracket 9 is welded or fixedly installed on the inner bottom wall of the light box 3. A moving rod 10 is linearly slidably installed in the mounting bracket 9. The second magnetic block 6 is fixedly sleeved on one end of the moving rod 10, and the end of the moving rod 10 away from the second magnetic block 6 is set to an arc surface.

[0040] Specifically, the lifting mechanism can be composed of a hydraulic pump, a hydraulic cylinder, hydraulic piping, and a control system. The hydraulic pump delivers hydraulic oil through piping to the hydraulic cylinder, pushing a piston into motion. The piston then connects to the lamp post 2, thereby raising and lowering the lamp post 2. The control system precisely controls the flow and pressure of the hydraulic oil, enabling smooth, stepless raising and lowering of the lamp post 2. The hydraulic lifting mechanism offers advantages such as smooth lifting, high load capacity, and low noise. It is suitable for smart street lamps that require frequent lifting and replacement of the advertising screen 4 and require high stability.

[0041] Specifically, when the advertising screen body 4 needs to be replaced, the lamp pole 2 descends in the base 1, so that the distance between the moving rod 10 and the arc block 8 gradually decreases. When one end of the moving rod 10 approaches the arc block 8, the moving rod 10 is pushed to the side away from the arc block 8 by the squeezing of its outer wall. In this way, by pushing the second magnetic block 6 laterally and in parallel, the magnetic field distribution characteristics between the magnets are utilized. The lateral movement can weaken or destroy the attraction between the first magnetic block 5 and the second magnetic block 6, so that it can be separated from the first magnetic block 5 when it moves to a certain interval. The bottom edge of the advertising screen body 4 is loosened from the gap between the first magnetic block 5 and the second magnetic block 6, which is convenient for the staff to remove the old advertising screen body 4.

[0042] Reference Figure 3 The sliding path of the moving rod 10 is perpendicular to the sliding path of the first magnetic block 5. A positioning ring 11 is fixedly sleeved on the end of the moving rod 10 away from the second magnetic block 6. A first reset member 12 is connected between the outer wall of the positioning ring 11 and the outer wall of the mounting frame 9; when the end of the moving rod 10 does not contact the arc block 8, the first reset member 12 is in a natural state.

[0043] Specifically, the first reset member 12 is preferably a compression spring that can withstand axial compression force; when one end of the moving rod 10 is squeezed by the outer wall of the arc-shaped block 8, the first reset member 12 is gradually compressed, so that after the lamp pole 2 is installed with the new advertising screen body 4 and rises, under the elastic action of the first reset member 12, the moving rod 10 can drive the second magnetic block 6 to reset, and the moving rod 10 drives the second magnetic block 6 to move in the direction close to the first magnetic block 5. When the second magnetic block 6 approaches the first magnetic block 5 to a certain distance, the magnetic attraction between the two is restored, and the bottom edge of the advertising screen body 4 is clamped and fixed again. In this process, the two C-shaped blocks 7 on the inner bottom wall of the light box 3 always provide auxiliary limiting function for the bottom edge of the advertising screen body 4, ensuring that the advertising screen will not shake or deviate significantly during the installation and replacement process, making the replacement operation of the advertising screen more convenient and efficient, while ensuring the display effect and stability of the newly installed advertising screen.

[0044] Example 2, reference Figure 1 - Figure 3 ,as well as Figure 5 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: a fixed roller 13 for installing the advertising screen body 4 is welded or fixedly installed in the inner cavity of the light box 3, and a vertical groove is opened at one end of the fixed roller 13. A limiting block 14 is slidably connected in the vertical groove, and a second reset member 15 is connected between the outer wall of the limiting block 14 and the inner wall of the fixed roller 13.

[0045] Specifically, the rollers provided with the advertising curtain body 4 can be pre-wound with the advertising curtain. During installation, it only needs to be directly put on the fixed roller 13 in the inner cavity of the light box 3. Compared with the method of directly winding the advertising curtain on the fixed roller 13, the time and difficulty of on-site installation are greatly reduced. The staff does not need to spend a lot of time winding and fixing the advertising curtain, which improves the replacement efficiency of the advertising curtain.

[0046] Specifically, the second reset member 15 is preferably a spring or compression spring. When the advertising screen body 4 needs to be replaced, the operator applies an external force to overcome the elastic force of the second reset member 15, pushing the stop block 14 into the vertical groove, away from the side wall of the advertising screen body 4, thereby easily removing the old advertising screen from the fixing roller 13. After replacing the new advertising screen, the stop block 14 is released and, under the elastic action of the second reset member 15, immediately pushed to re-secure the new advertising screen body 4. The entire replacement process is simple and convenient. The remaining structure is the same as that of Example 1.

[0047] Example 3, reference Figure 1 - Figure 8 , which is the third embodiment of the present invention, is different from the first embodiment in that: a lubricating mechanism is installed on the side of the second magnetic block 6 away from the first magnetic block 5, and the lubricating mechanism includes a liquid storage box 16 installed in the inner cavity of the light box 3 for storing lubricating liquid, and a liquid filling port 22 is provided on the wall of the liquid storage box 16, and a sealing plug (such as Figure 6 A liquid reservoir 17 is fixedly mounted on the top of the liquid reservoir 16, and a liquid outlet pipe 18 is detachably mounted on the outer wall of the liquid reservoir 17.

[0048] Reference Figure 7 A piston rod 19 is slidably installed in the liquid storage cylinder 17, and the diameter of the piston rod 19 is adapted to the inner diameter of the liquid storage cylinder 17. The outer wall of the piston rod 19 is connected to the rod body, and the tail end of the piston rod 19 is connected to one end of the moving rod 10 through a connecting block, and a horizontal slide groove for the movement of the connecting block is provided on the wall of the liquid storage cylinder 17; a one-way liquid inlet valve 20 is installed between the liquid storage box 16 and the liquid storage cylinder 17, and a one-way liquid outlet valve 21 is installed on the liquid outlet pipe 18.

[0049] Specifically, the one-way liquid inlet valve 20 allows the lubricating liquid in the liquid storage box 16 to flow into the liquid storage cylinder 17 in one direction only, preventing the lubricating liquid in the liquid storage cylinder 17 from flowing back into the liquid storage box 16, thereby ensuring the directionality and stability of the lubricating liquid flow; the one-way liquid outlet valve 21 can ensure that each time the piston rod 19 is pushed, the lubricating liquid in the liquid storage cylinder 17 is discharged in a predetermined direction and amount, thereby preventing the lubricating liquid from flowing freely during the reciprocating motion of the piston rod 19, and being unable to control the amount of lubricating liquid delivered to the threaded connection part each time.

[0050] Specifically, lubricating liquid is added to the liquid reservoir 16 through the liquid filling port 22. When the lamp pole 2 descends, the moving rod 10 moves synchronously with the lamp pole 2. Since the piston rod 19 is connected to the moving rod 10 via the connecting block, the moving rod 10 drives the piston rod 19 to slide within the liquid reservoir 17. As the piston rod 19 moves away from the liquid outlet pipe 18, the pressure within the liquid reservoir 17 decreases. Under the action of the one-way liquid inlet valve 20, the lubricating liquid in the liquid reservoir 16 flows into the liquid reservoir 17, replenishing the amount of lubricating liquid in the liquid reservoir 17. When the lamp pole 2 rises, the moving rod 10 drives the piston rod 19 to move toward the liquid outlet pipe 18, and the pressure within the liquid reservoir 17 increases. At this time, the one-way liquid inlet valve 20 closes, preventing the lubricating liquid from flowing back into the liquid reservoir 16. At the same time, the one-way liquid outlet valve 21 opens, and the lubricating liquid in the liquid reservoir 17 flows out through the liquid outlet pipe 18 under the action of pressure.

[0051] Reference Figure 8 The lifting mechanism includes a screw rod 23 rotatably installed in the inner cavity of the base 1 through a bearing. A limiting hole adapted to the shape of the lamp pole 2 is provided on the top of the base 1. An internal thread is provided on the inner side of the lamp pole 2, and the lamp pole 2 is threadedly installed on the surface of the screw rod 23; the liquid outlet pipe 18 extends to the internal thread surface of the lamp pole 2 at one end away from the liquid storage cylinder 17; when the lamp pole 2 is lowered through the screw rod 23, the liquid outlet pipe 18 can transport the lubricating liquid in the liquid storage cylinder 17 to the internal thread of the lamp pole 2, thereby lubricating the threaded connection between the screw rod 23 and the lamp pole 2.

[0052] Specifically, the screw rod 23 can be driven in a variety of ways to achieve the lifting operation of the lamp post 2. A common driving method is to drive the screw rod 23 by a motor, such as Figure 8 As shown, a reduction motor is installed in the base 1, and the output shaft of the motor is connected to one end of the screw 23 through a bevel gear set. When the reduction motor is running, the torque it outputs is transmitted to the screw 23, driving the screw 23 to rotate. The reduction motor can adjust the speed and torque according to actual needs to ensure that the lamp pole 2 is raised and lowered smoothly and uniformly. For example, in some places where the height of the lamp pole needs to be frequently adjusted to adapt to different environments, such as smart street lights near road construction areas, a variable frequency reduction motor with precise speed control can be selected. The motor speed can be adjusted according to actual conditions through the control system, thereby accurately controlling the lifting speed and position of the lamp pole 2.

[0053] Alternatively, manual drive can be employed. A manual crank is mounted at one end of the screw rod 23. When the height of the lamp pole 2 needs to be adjusted, the operator can rotate the crank to drive the screw rod 23. While this method is relatively laborious, it offers high practicality and flexibility in areas with limited power supply or where automation requirements are low. For example, in remote rural areas, smart street light maintenance personnel can use the crank to raise and lower the lamp pole 2, facilitating tasks such as replacing advertising screens or overhauling lamps. The remaining structure is the same as that of Example 2.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A smart street lamp with a roll-up advertising device, comprising a base (1), a lamp post (2) mounted on the inner side of the base (1), a light box (3) arranged on the outer wall of the lamp post (2), and an advertising curtain body (4) detachably mounted in the light box (3), characterized in that: A first magnetic block (5) is slidably provided on the inner side wall of the light box (3), a second magnetic block (6) is provided on one side of the first magnetic block (5), and the second magnetic block (6) is magnetically attracted to the first magnetic block (5), and a gap is provided between the first magnetic block (5) and the second magnetic block (6) for inserting the bottom edge of the advertising curtain body (4); Two C-shaped blocks (7) are provided on the inner bottom wall of the light box (3), and the openings of the two C-shaped blocks (7) are arranged opposite to each other; A lifting mechanism is provided between the base (1) and the lamp pole (2); an arc block (8) is integrally formed on the top of the base (1); a mounting frame (9) is provided on the inner bottom wall of the light box (3); a moving rod (10) is provided in a linearly sliding manner in the mounting frame (9); the second magnetic block (6) is fixedly sleeved on one end of the moving rod (10); and the end of the moving rod (10) away from the second magnetic block (6) is provided as an arc surface; The sliding path of the movable rod (10) is perpendicular to the sliding path of the first magnetic block (5); a positioning ring (11) is provided at one end of the movable rod (10) away from the second magnetic block (6); a first reset member (12) is connected between the outer wall of the positioning ring (11) and the outer wall of the mounting frame (9); When the end of the moving rod (10) does not contact the arc block (8), the first reset member (12) is in a natural state.

2. The smart street lamp with a roll-up advertising device according to claim 1, characterized in that: The inner cavity of the light box (3) is provided with a fixed roller (13) for mounting the advertising screen body (4), one end of the fixed roller (13) is provided with a vertical groove, a limit block (14) is slidably provided in the vertical groove, and a second reset member (15) is connected between the outer wall of the limit block (14) and the inner wall of the fixed roller (13).

3. The smart street lamp with a roll-up advertising device according to claim 1, characterized in that: A lubricating mechanism is provided on a side of the second magnetic block (6) away from the first magnetic block (5), the lubricating mechanism comprising a liquid storage box (16) provided in the inner cavity of the light box (3) for storing lubricating liquid, a liquid storage cylinder (17) provided on the top of the liquid storage box (16), and a liquid outlet pipe (18) provided on the outer wall of the liquid storage cylinder (17).

4. The smart street lamp with a roll-up advertising device according to claim 3, characterized in that: A piston rod (19) is slidably mounted in the liquid storage cylinder (17), and the diameter of the piston rod (19) is adapted to the inner diameter of the liquid storage cylinder (17). The tail end of the piston rod (19) is connected to one end of the moving rod (10) through a connecting block, and a horizontal sliding groove for the connecting block to move is provided on the wall of the liquid storage cylinder (17); A one-way liquid inlet valve (20) is provided between the liquid storage box (16) and the liquid storage cylinder (17), and a one-way liquid outlet valve (21) is provided on the liquid outlet pipe (18).

5. The smart street lamp with a roll-up advertising device according to claim 3, characterized in that: A liquid adding port (22) is provided on the wall of the liquid storage box (16), and a sealing plug is provided on the liquid adding port (22).

6. The smart street lamp with a roll-up advertising device according to claim 3, characterized in that: The lifting mechanism comprises a screw rod (23) rotatably arranged in the inner cavity of the base (1) via a bearing, a limiting hole adapted to the outer shape of the lamp pole (2) is provided on the top of the base (1), an internal thread is provided on the inner side of the lamp pole (2), and the lamp pole (2) is threadedly mounted on the surface of the screw rod (23).

7. The smart street lamp with a roll-up advertising device according to claim 6, characterized in that: One end of the liquid outlet pipe (18) away from the liquid storage cylinder (17) extends to the internal thread surface of the lamp pole (2); When the lamp pole (2) is lowered by the screw rod (23), the liquid outlet pipe (18) can transport the lubricating liquid in the liquid storage cylinder (17) to the internal thread of the lamp pole (2), thereby lubricating the threaded connection between the screw rod (23) and the lamp pole (2).

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