Traffic sign for a smart city

Abstract

The present application relates to the technical field of traffic guidance devices, and in particular to a traffic sign for a smart city, which includes a control system, a monitoring system, a pair of columns arranged on both sides of a road, and a fixing frame fixed on the two columns, wherein the length direction of the fixing frame is the same as the width direction of the road, and the fixing frame is provided with an electronic display board for displaying various prompt information, and the monitoring system can monitor the traffic conditions, road conditions and surrounding environment conditions on the road in real time, and the control system is electrically connected to the electronic display board and the monitoring system, and the control system can control the content displayed on the electronic display board. The present application has the effect of improving the indication performance of traffic signs, allowing drivers to clearly observe the indication content of traffic signs both during the day and at night.

Description

Technical Field

[0001] The present application relates to the technical field of traffic guidance devices, and in particular to a traffic sign for a smart city. Background Art

[0002] Signs are signs that indicate directions, also called billboards and signboards. For example, toilet signs and road signs can all be called signs. Its definition is relatively broad. Hotel lobby signs, guide signs, room number signs, information desk signs, cashier signs, plastic signs for parking, park signs, etc. all belong to the category of signs. Road traffic signs are graphic symbols that display traffic regulations and road information. They can make traffic regulations vivid, specific, and concise. At the same time, they also express content that is difficult to describe in words. They are used to manage traffic, indicate driving directions, and ensure smooth roads and driving safety. It is applicable to highways, urban roads, and all special highways. It has the nature of a decree and must be obeyed by vehicles and pedestrians.

[0003] Existing traffic signs are mainly composed of supporting columns and signboards. At present, most of the signs are coated with reflective paint on the fonts on the signs, so that drivers can notice the signs on the signs at night. However, in the case of poor lighting conditions at night, the road signs can only be seen by relying on the headlights of the vehicle to illuminate the traffic signs. Drivers are prone to not seeing the traffic signs clearly and go to the wrong intersection. Utility Model Content

[0004] In order to improve the indication performance of traffic signs and enable drivers to clearly observe the content indicated by traffic signs both during the day and at night, the present application provides a traffic sign for a smart city.

[0005] This application provides a smart city traffic sign, which adopts the following technical solution:

[0006] A traffic sign for a smart city comprises a control system, a monitoring system, a pair of upright posts arranged on both sides of a road, and a fixing frame fixed on the two upright posts, wherein the length direction of the fixing frame is the same as the width direction of the road, an electronic display board for displaying various prompt information is arranged on the fixing frame, the monitoring system can monitor the traffic conditions, road conditions and surrounding environment conditions on the road in real time, the control system is electrically connected to the electronic display board and the monitoring system, and the control system can control the content displayed on the electronic display board.

[0007] By adopting the above-mentioned technical scheme, the electronic display board set up in the present application adopts power supply to provide information prompts, is not affected by insufficient light at night, and can display various information on the road in real time. The information monitored by the monitoring system is transmitted to the control system, and the information is displayed on the electronic display board through the control system. Compared with traditional fixed information signs, the electronic display board can display more information, can display the current situation on the road in time, and is more intelligent, reducing excessive human intervention.

[0008] Optionally, a plurality of electronic display boards are arranged on the fixing frame, the plurality of electronic display boards are evenly distributed along the length direction of the fixing frame, and the plurality of electronic display boards can correspond to a plurality of lanes.

[0009] By adopting the above technical solution, multiple electronic display boards can display the current situation on each lane accordingly, which is more targeted and can temporarily change the driving direction of the current road according to the current traffic volume on the road, so that vehicles can pass through the section quickly and avoid congestion.

[0010] Optionally, an installation component is provided on the fixed frame and on the side facing the vehicle, and the installation component includes a mounting frame fixed on the fixed frame, the length direction of the mounting frame is the same as the length direction of the fixed frame, and a plurality of electronic display boards are slidably arranged on the mounting frame and arranged along the length direction of the mounting frame.

[0011] By adopting the above technical solution, the set mounting frame can enable multiple electronic display boards to be installed in a timely manner. When there is too much road information that needs to be prompted, one electronic prompt board cannot display all of it. The multiple electronic display boards can be moved together and connected together to centrally display the road prompt information so that drivers can pay more attention to it.

[0012] Optionally, the mounting frame includes a pair of mutually parallel cross bars, the two cross bars are fixed to the fixing frame via a connecting rod, and slide grooves are provided on both cross bars, and the upper and lower sides of the electronic display board are slidably fitted in the slide grooves on the cross bars.

[0013] By adopting the above technical solution, the mounting frame can be fixed to the fixing frame through the provided connecting rod, so that the electronic display board can be installed between the two cross bars, and through the sliding grooves provided on the cross bars, the upper and lower sides of the electronic display board can be slidably fitted on the two cross bars, so that the electronic display board can slide along the length direction of the cross bars during the sliding process, and the sliding is also more stable.

[0014] Optionally, the mounting assembly further includes a driving component for controlling the sliding of the electronic display board, the driving component including a driving gear rotatably arranged on the upper side of the electronic display board and a rack fixed in a slide groove of a cross bar on the upper side of the mounting frame, the driving gear meshes with the rack, a driving motor for controlling the rotation of the driving gear is fixed on the back of the electronic display board, and the control system can control the start and stop of the driving motor.

[0015] By adopting the above technical solution, when it is necessary to control the movement of the electronic display board, the drive motor is started. Under the action of the drive gear and the matching rack, the drive gear can rotate on the rack, thereby controlling the movement of the electronic display board. The matching method of the drive gear and the rack makes the moving process more stable and avoids the problem of slipping.

[0016] Optionally, a plurality of pulleys are rotatably provided on the lower side of the electronic display board, and the plurality of pulleys are slidably fitted in the crossbar sliding grooves on the lower side of the mounting frame.

[0017] By adopting the above technical solution, during the movement of the electronic display board, multiple slides arranged on the lower side of the electronic display board can slide in the slide groove of the cross bar, providing stable support for the electronic display board, allowing the electronic display board to slide more smoothly.

[0018] Optionally, a pair of lifting frames are symmetrically arranged at both ends of the mounting frame, and the two lifting frames are vertically slidably arranged on corresponding columns. The length direction of the two lifting frames is the same as the length direction of the mounting frame, and the lifting frames include a pair of cross bars and sliding grooves with the same structure as the fixed frame, and the electronic display board can slide onto the lifting frames.

[0019] By adopting the above technical solution, when one or more of the multiple electronic display boards need to be replaced or repaired, the electronic display board can be controlled to move to the lifting frame. Since the lifting frame slides on the column, the lifting frame carrying the electronic display board can be moved downward to the lower end of the column, allowing workers to repair or replace the electronic display board on the ground, avoiding the need to occupy the lane. A shelf is set up under the electronic display board to allow workers to replace and repair the electronic display board at high altitude, thereby ensuring the safety of the workers.

[0020] Optionally, both of the two columns are provided with a lifting component for controlling the lifting frame, and the lifting component includes a limit frame that vertically slides on the column, the limit frame and the lifting frame are fixed, and a lifting screw is vertically rotated on the column, the lifting screw vertically passes through the limit frame, and the two are threadedly connected, and a lifting motor that drives the lifting screw to rotate is also installed on the column.

[0021] By adopting the above technical solution, when the electronic display board needs to be replaced or repaired, the control system controls the lifting motor to start, and under the action of the lifting screw and the vertical limit of the limit frame, the lifting frame carrying the electronic display board can move downward along the column until the lifting frame moves to the lower end of the column, and the lifting frame can be quickly lowered to the lower end of the column by electronic control.

[0022] Optionally, a storage rack is fixed to the ends of the two lifting frames away from the mounting frame, the length direction of the storage rack is the same as the length direction of the mounting frame, and the storage rack includes a pair of cross bars and slide grooves with the same structure as the fixed frame, the storage rack is connected and fixed to the fixed frame, and the electronic display board can slide onto the temporary storage rack.

[0023] By adopting the above technical solution, when an electronic display board located in the middle position among multiple electronic display boards needs to be inspected and replaced, the electronic display boards located on both sides can be slid to the storage rack first, and then the electronic display board that needs to be replaced can be slid onto the lifting rack, and then the electronic display board can be repaired or replaced, avoiding the need to remove all the electronic display boards on both sides from the mounting rack before removing the electronic display board that needs to be replaced and inspected.

[0024] Optionally, the ends of the mounting frame and the storage frame at both ends of the lifting frame are provided with proximity switch sensors, the proximity switch sensors are electrically connected to the control system, and the control system can control the start and stop of the lifting motor.

[0025] By adopting the above technical solution, the provided proximity switch sensor can detect whether the lifting frame has moved to the correct position. When the lifting frame, the storage frame and the mounting frame are in a horizontal position, the electronic display board on the lifting frame can be moved to the mounting frame.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The electronic display board is equipped with a monitoring system and a control system to display all road conditions on the electronic display board, which can provide more information. The electronic display board is not affected by insufficient light at night, so that drivers can see relevant prompt information from a distance. The electronic prompt board is set above the middle of the road, so that drivers can see it more clearly. The electronic display board can be applied to the road more intelligently.

[0028] 2. When replacing or repairing an electronic display board, the display board to be repaired and replaced can be moved to the lifting frame first without affecting other electronic display boards, and then moved to the lower end of the column, making it more convenient for staff to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the installation component and the lifting component according to the embodiment of the present application.

[0031] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0032] Explanation of the reference numerals in the accompanying drawings: 1. column; 2. fixing frame; 3. electronic display board; 4. mounting assembly; 41. mounting frame; 411. cross bar; 412. connecting rod; 42. lifting frame; 43. storage rack; 44. driving member; 441. driving gear; 442. driving motor; 443. driven gear; 444. rack; 445. pulley; 5. lifting assembly; 51. limiting frame; 511. limiting plate; 512. connecting plate; 52. lifting screw; 53. lifting motor; 6. protective telescopic tube; 7. protective shell; 8. proximity switch sensor; 9. solar panel. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-3 This application is described in further detail.

[0034] An embodiment of the present application discloses a traffic sign for a smart city.

[0035] Reference Figure 1 A traffic sign for a smart city includes a pair of columns 1 symmetrically arranged on the roadside on both sides of the road, the columns 1 are composed of two parallel uprights, a fixing frame 2 with a rectangular frame structure is fixed near the upper ends of the two columns 1, the fixing frame 2 is arranged across the two columns 1, the length direction of the fixing frame 2 is perpendicular to the height direction of the two columns 1, and the two ends of the fixing frame 2 extend out of the side of the column 1, and a plurality of electronic display boards 3 are arranged on the fixing frame 2 and between the two columns 1, the plurality of electronic display boards 3 are evenly distributed along the length direction of the fixing frame 2, and the plurality of electronic display boards 3 are arranged corresponding to each lane and are used to prompt vehicles on each lane.

[0036] The traffic sign of the smart city also includes a control system for controlling the entire traffic sign and a monitoring system for real-time monitoring of traffic conditions on the road, road conditions and surrounding environmental conditions, but is not limited to monitoring the above conditions. Corresponding monitoring equipment can be added according to actual needs to carry out corresponding monitoring so that it can be displayed on the electronic display board 3; the control system is electrically connected to the electronic display board 3 and the monitoring system, and various conditions monitored by the monitoring system can be transmitted to the control system and then displayed on the corresponding electronic display board 3 through the control system to achieve the purpose of reminding the driver.

[0037] Reference Figure 1 and Figure 2 A mounting assembly 4 for mounting a plurality of electronic display boards 3 is arranged on the fixing frame 2 and on one side facing the direction of vehicle travel. The mounting assembly 4 includes a mounting frame 41 fixed on the fixing frame 2. The length direction of the mounting frame 41 is the same as the length direction of the fixing frame 2, and the mounting frame 41 is located between the two columns 1. The mounting frame 41 includes a pair of parallel cross bars 411. The two cross bars 411 are parallel to the fixing frame 2. A plurality of connecting rods 412 are fixed between the two cross bars 411 and the fixing frame 2. The connecting rods 412 are perpendicular to the fixing frame 2 and the cross bars 411. The plurality of connecting rods 412 are perpendicular to the fixing frame 2 and the cross bars 411. The connecting rods 412 are evenly distributed along the length direction of the crossbar 411, so that the mounting frame 41 can be set in front of the fixing frame 2, and multiple electronic display boards 3 are installed on the two crossbars 411; sliding grooves arranged along the length direction are opened on the opposite surfaces between the two crossbars 411, and the upper and lower sides of the multiple electronic display boards 3 slide in the sliding grooves of the two crossbars 411, so that the multiple electronic display boards 3 can slide freely on the mounting frame 41. When there is too much information to be displayed to remind the driver to pay attention, the staff can control the multiple electronic display screens to be close to each other and combine them into a whole for use.

[0038] A pair of lifting frames 42 with the same structure are symmetrically arranged at the ends of the two cross bars 411 on the mounting frame 41. The two lifting frames 42 are vertically slidably arranged on the corresponding columns 1, and the length direction of the lifting frames 42 is the same as the length direction of the mounting frame 41; the lifting frame 42 includes a pair of cross bars 411 with the same structure as the two cross bars 411 on the mounting frame 41, and corresponding slide grooves are provided on the cross bars 411. The cross bars 411 on the lifting frame 42 correspond to the cross bars 411 on the mounting frame 41 and the slide grooves are connected, and the electronic display board 3 on the mounting frame 41 can slide onto the cross bars 411 on the lifting frame. When the electronic display board 3 needs to be repaired or fails, the staff can control the electronic display board 3 to move to the lifting frame 42, and then move the electronic display board 3 on the lifting frame 42 vertically to the lower end of the column 1, so that the staff can carry out maintenance on the ground, avoiding the need to disassemble the electronic display board 3 from the mounting frame 41, and at the same time, preventing the disassembly of the electronic display board 3 from occupying the road and affecting the passage of vehicles.

[0039] Reference Figure 1 and Figure 2A pair of storage racks 43 are symmetrically arranged at the ends of the two lifting racks 42 away from the mounting rack 41. The two storage racks 43 are located on the outside of the column 1, and the length direction of the storage racks 43 is the same as the length direction of the mounting rack 41 and the lifting rack 42. The mounting rack 41, the lifting rack 42 and the storage rack 43 can be combined to form a rectangular frame structure; the storage rack 43 includes a pair of cross bars 411 with the same structure as the two cross bars 411 on the mounting rack 41, and corresponding slide grooves are opened on the cross bars 411. A plurality of connecting rods 412 are also fixed between the cross bars 411 on the storage rack 43 and the fixed rack 2, so that the storage rack 43 can be arranged in front of the fixed rack 2. The cross bars 411 on the storage rack 43 correspond to the cross bars 411 on the lifting rack 42, and the slide grooves are connected, so When the electronic display board 3 is not being repaired, the cross bar 411 on the mounting frame 41, the cross bar 411 on the lifting frame 42 and the cross bar 411 on the storage rack 43 are connected to form an integral whole, and the slide grooves on the three are connected, so that the electronic display board 3 can slide from the mounting frame 41 to the storage rack 43 via the lifting frame 42; when the electronic display board 3 located in the middle position among multiple electronic display boards 3 needs to be repaired and replaced, the electronic display boards 3 located on both sides can be slid to the storage rack 43 first, and then the electronic display boards 3 to be replaced can be slid to the lifting frame 42, and then the electronic display boards 3 can be repaired or replaced, avoiding the need to remove all the electronic display boards 3 on both sides from the mounting frame 41 before removing the electronic display boards 3 to be replaced and repaired.

[0040] Reference Figure 2 and Figure 3The mounting assembly 4 also includes a driving member 44 for controlling each electronic display board 3 to slide on the mounting frame 41, the lifting frame 42 and the storage frame 43. The driving member 44 includes a driving gear 441 rotatably arranged at the middle position of the upper side of the electronic display board 3. A driving motor 442 is fixed on the back of the electronic display board 3. The control system is electrically connected to the driving motor 442. The start and stop of the driving motor 442 is controlled by the control system. The output shaft of the driving motor 442 is fixed to the driving gear 441. The driving gear 441 is controlled to rotate by the driving motor 442. A pair of driven gears 443 are symmetrically arranged on the upper side of the electronic display board 3 and on both sides of the driving gear 441. The two driven gears 443 are rotatably connected to the electronic display board 3. The two driven gears 443 can make the electronic display board 3 move more stably; a rack 444 is fixed in the slide groove of the upper side cross bar 411 of the mounting frame 41, the slide groove of the upper side cross bar 411 of the lifting frame 42, and the slide groove of the upper side cross bar 411 of the storage rack 43. The rack 444 is divided into three sections, which are respectively fixed to the upper side cross bar 411 of the mounting frame 41, the upper side cross bar 411 of the lifting frame 42, and the upper side cross bar 411 of the storage rack 43. The driving gear 441 and the driven gear 443 are respectively meshed with the rack 444. When it is necessary to control the movement of the electronic display board 3, the staff controls the driving motor 442 to start through the control system. Under the action of the driving gear 441 and the rack 444, the electronic display board 3 can move.

[0041] Reference Figure 2 and Figure 3 A plurality of pulleys 445 are rotatably arranged on the lower side of the electronic display board 3, and the plurality of pulleys 445 are slidably fitted in the slide grooves of the lower cross bar 411 of the mounting frame 41, the slide grooves of the lower cross bar 411 of the lifting frame 42, and the slide grooves of the lower cross bar 411 of the storage frame 43. When the electronic display board 3 is in the process of horizontal movement, the pulleys 445 arranged on the lower side of the electronic display board 3 can make the electronic display board 3 slide more smoothly.

[0042] Reference Figure 2 and Figure 3, a lifting assembly 5 for controlling the movement of the lifting frame 42 is arranged on both columns 1, and the lifting assembly 5 includes a limit frame 51 vertically slidably arranged on the column 1, and the limit frame 51 includes a pair of U-shaped limit plates 511 vertically slidably matched on the column 1, and a pair of upper and lower connecting plates 512 are fixed between the two limit plates 511, and the other end of the connecting plate 512 is fixed to the cross bar 411 on the lifting frame 42; a lifting screw 52 is vertically rotatably arranged on the column 1, and the lifting screw 52 vertically passes through the connecting plate 512 on the limit frame 51, and the lifting screw 52 is threadedly connected with the two connecting plates 512, a lifting motor 53 is fixed at the lower end of the column 1, the control system is electrically connected to the lifting motor 53, and the output shaft of the lifting motor 53 is fixed to the lower end of the lifting screw 52. When the electronic display board 3 on the lifting frame 42 needs to be replaced or repaired, the lifting motor 53 is started by controlling the control system, and under the action of the lifting screw 52, ​​the limit frame 51 and the lifting frame 42 are moved in the vertical direction, and the lifting frame 42 is moved to the lower end of the column 1, so that the staff can more conveniently replace or repair the electronic display board 3.

[0043] Reference Figure 1 , Figure 2 and Figure 3A flexible protective telescopic tube 6 is provided on the outside of the lifting screw 52. The protective telescopic tube 6 is provided with multiple sections, which can completely wrap the exposed lifting screw 52. According to the up and down movement of the limit frame 51, the protective telescopic tube 6 is stretched or compressed to prevent the lifting screw 52 from being eroded by rain in the outdoor environment. A protective shell 7 is provided on the outer cover of the lifting motor 53 to protect the lifting motor 53. The ends of the upper crossbar 411 on the storage rack 43 at both ends of the lifting rack 42 and the ends of the upper crossbar 411 on the mounting rack 41 are both provided with proximity switch sensors 8, and the proximity switch sensors 8 are electrically connected to the control system. When the lifting rack 42 moves upward from the lower end of the column 1, when the ends of the upper crossbar 411 of the lifting rack 42 gradually approach the proximity switch sensors 8 and contact the proximity switch sensors 8, the proximity switch sensors 8 detect that the lifting rack 42 has moved to the correct position, and transmit signals to the control system, and control the lifting motor 53 to stop through the control system; position sensors for detecting the position of the electronic display board 3 are all provided on the mounting rack 41, the lifting rack 42 and the storage rack 43. When the electronic display board 3 moves to the mounting rack 41, the lifting rack 42 or the storage rack 43, the signals can be fed back to the control system in real time, so as to facilitate monitoring of the position of the electronic display board 3. When the electronic display board 3 to be replaced moves to the lifting rack 42, the signals can be transmitted in time, and the lifting rack 42 can be moved downward, so as to avoid the lifting rack 42 starting to move before the electronic display board 3 moves to the lifting rack 42. Solar panels 9 are provided at the upper ends of the two columns 1, and a battery pack for storing electricity is provided in the control system, and the solar panels 9 are connected to the battery pack to avoid the need for additional power supply.

[0044] The implementation principle of a smart city traffic sign in an embodiment of the present application is as follows: the present application uses an electronic display board 3 to prompt vehicles traveling on the road. The electronic display board 3 is self-luminous to avoid being affected by insufficient light during the day and at night. The monitoring system can monitor various conditions on the road in real time, and transmit the monitored information to the control system, which is controlled by the control system. When the electronic display board 3 needs to be replaced or repaired, the electronic display board 3 to be replaced or repaired can be moved to the lower end of the column 1 to facilitate operation by the staff.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A traffic sign for a smart city, characterized by: The invention comprises a control system, a monitoring system, a pair of upright posts (1) arranged on both sides of a road, and a fixing frame (2) fixed on the two upright posts (1); the length direction of the fixing frame (2) is the same as the width direction of the road; an electronic display board (3) for displaying various prompt information is arranged on the fixing frame (2); the monitoring system can monitor the traffic conditions, road conditions and surrounding environment conditions on the road in real time; the control system is electrically connected to the electronic display board (3) and the monitoring system; and the control system can control the content displayed on the electronic display board (3).

2. A traffic sign for a smart city according to claim 1, characterized in that: A plurality of electronic display boards (3) are arranged on the fixing frame (2), the plurality of electronic display boards (3) are evenly distributed along the length direction of the fixing frame (2), and the plurality of electronic display boards (3) can correspond to a plurality of lanes.

3. The traffic sign of a smart city according to claim 1, characterized in that: A mounting assembly (4) is arranged on the side of the fixing frame (2) facing the vehicle, the mounting assembly (4) comprising a mounting frame (41) fixed on the fixing frame (2), the length direction of the mounting frame (41) being the same as the length direction of the fixing frame (2), and a plurality of electronic display boards (3) are slidably arranged on the mounting frame (41) and arranged along the length direction of the mounting frame (41).

4. A traffic sign for a smart city according to claim 3, characterized in that: The mounting frame (41) comprises a pair of mutually parallel cross bars (411), the two cross bars (411) being fixed to the fixing frame (2) via a connecting rod (412), and the two cross bars (411) are both provided with a slide groove, and the upper and lower sides of the electronic display board (3) are slidably fitted in the slide grooves on the cross bars (411).

5. The traffic sign of a smart city according to claim 3, characterized in that: The mounting assembly (4) further comprises a driving member (44) for controlling the sliding of the electronic display board (3); the driving member (44) comprises a driving gear (441) rotatably arranged on the upper side of the electronic display board (3) and a rack (444) fixed in a sliding groove of a cross bar (411) on the upper side of the mounting frame (41); the driving gear (441) is meshed with the rack (444); a driving motor (442) for controlling the rotation of the driving gear (441) is fixed on the back side of the electronic display board (3); and the control system can control the start and stop of the driving motor (442).

6. The traffic sign of a smart city according to claim 1, characterized in that: A plurality of pulleys (445) are rotatably arranged on the lower side of the electronic display board (3), and the plurality of pulleys (445) are slidably fitted in the sliding grooves of the crossbar (411) on the lower side of the mounting frame (41).

7. The traffic sign of a smart city according to claim 3, characterized in that: A pair of lifting frames (42) are symmetrically arranged at both ends of the mounting frame (41); the two lifting frames (42) are vertically slidably arranged on corresponding upright posts (1); the length direction of the two lifting frames (42) is the same as the length direction of the mounting frame (41); and the lifting frames (42) include a pair of cross bars (411) and a slide groove having the same structure as the fixed frame (2); and the electronic display board (3) can slide onto the lifting frames (42).

8. The traffic sign of a smart city according to claim 1, characterized in that: A lifting assembly (5) for controlling the lifting frame (42) is provided on each of the two columns (1), and the lifting assembly (5) comprises a limit frame (51) vertically slidably fitted on the column (1), the limit frame (51) and the lifting frame (42) are fixed, a lifting screw (52) is vertically rotatably provided on the column (1), the lifting screw (52) vertically passes through the limit frame (51), and the two are threadedly connected, and a lifting motor (53) for driving the lifting screw (52) to rotate is also installed on the column (1).

9. A traffic sign for a smart city according to claim 8, characterized in that: A storage rack (43) is fixed to the ends of the two lifting racks (42) away from the mounting rack (41); the length direction of the storage rack (43) is the same as the length direction of the mounting rack (41), and the storage rack (43) includes a pair of cross bars (411) and a slide groove having the same structure as the fixed rack (2); the storage rack (43) is connected and fixed to the fixed rack (2), and the electronic display board (3) can slide onto the temporary storage rack.

10. A traffic sign for a smart city according to claim 8, characterized in that: The ends of the mounting frame (41) and the storage frame (43) at both ends of the lifting frame (42) are both provided with proximity switch sensors (8), the proximity switch sensors (8) are electrically connected to a control system, and the control system can control the start and stop of the lifting motor (53).

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