A safety warning sign for children's outdoor activity area

Abstract

The present invention relates to the technical field of warning sign equipment, and in particular to a safety warning sign for children's outdoor activity areas, comprising a first warning sign, a second warning sign, and a plurality of third warning signs. The first warning sign comprises a warning sign support plate, a first warning sign base, a first warning sign mounting frame, a second warning sign mounting frame, a first hinge seat arranged on one side of the front end surface of the first warning sign base, a drive cylinder, a second hinge seat, and a right-angle piece. When used outdoors, a solar cell assembly can maintain power to provide power for a warning light, a human proximity sensor, and a speaker. When the human proximity sensor detects that a child is approaching, the speaker will emit a buzzer to alert security personnel or teachers, and the sign is easy to fold and store.

Description

Technical Field

[0001] The invention relates to the technical field of warning sign equipment, and in particular to a safety warning sign for children's outdoor activity areas. Background Art

[0002] Outdoor activities have a positive effect on children's physical and mental health and social development. Schools also regularly let children go outdoors. For safety reasons, schools will set up warning signs outside the activity area, especially at intersections, to remind vehicles not to approach and children not to leave the activity area.

[0003] A common warning sign structure is a solar warning device disclosed in Chinese patent publication number CN113669674A, which includes a device housing, a circuit board and a battery arranged in the device housing, a cover plate covering the opening on the back of the device housing, and an LED warning light and a reflective film installed on the front of the device housing. The front of the device housing is provided with an installation surface inclined up and down, and a solar charging panel is installed on the installation surface. The circuit board and the battery are connected by wires, and the solar charging panel and the LED warning light are connected to the circuit board by wires. The existing general structure of the warning device is disclosed.

[0004] However, in actual use, it was found that the existing warning signs could not alert staff when children approached, and the existing warning signs were generally made relatively small for easy storage. Children, driven by curiosity, could easily climb over them or drill through gaps between fences, making them difficult to be discovered. Summary of the invention

[0005] Therefore, in response to the above-mentioned problems, the present invention proposes a safety warning sign for children's outdoor activity areas, which is easy to fold and store, and can issue a warning when a child is detected approaching to alert teachers or security personnel.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A safety warning sign for a children's outdoor activity area comprises a first warning sign, a second warning sign, and a plurality of third warning signs arranged between the first warning sign and the second warning sign, wherein the first warning sign comprises a warning sign support plate, a first warning sign base arranged on the top surface of the warning sign support plate, a first warning sign mounting frame hingedly arranged on the top surface of the first warning sign base, a second warning sign mounting frame hingedly arranged on a side of the first warning sign mounting frame away from the first warning sign base, a first hinge seat arranged on one side of the front end surface of the first warning sign base, a driving cylinder rotatably arranged between the first hinge seat and the first warning sign mounting frame, a second hinge seat arranged on the other side of the front end surface of the first warning sign base, and a third warning sign mounting frame rotatably arranged on the first warning sign base. A right-angle piece on a first warning sign mounting frame, a first hinged portion arranged on the right-angle piece and located at a right-angle position, a second hinged portion and a third hinged portion arranged on the right-angle piece away from the right-angle position, a first connecting rod rotatably arranged on the right-angle piece between the second hinged portion and a second hinge seat, a second connecting rod rotatably arranged on the right-angle piece between the third hinged portion and the second warning sign mounting frame, a rectangular warning sign housing arranged on the top surface of the second warning sign mounting frame, a solar cell assembly arranged on the top surface of the rectangular warning sign housing, a warning light and a controller arranged in the rectangular warning sign housing, a human proximity sensor arranged on the front end surface of the rectangular warning sign housing, and a speaker arranged on the right side of the rectangular warning sign housing.

[0008] Furthermore, a first cylinder is provided on a lateral side of the first warning sign mounting frame, a second cylinder is provided on a lateral side of the second warning sign mounting frame, and the third warning sign includes a second warning sign base provided on a lateral side of the first warning sign base, a third warning sign mounting frame rotatably provided on the top surface of the second warning sign base, a fourth warning sign mounting frame rotatably provided on the top surface of the third warning sign mounting frame, a first warning sign docking hole provided on a lateral side of the third warning sign mounting frame and for inserting the first cylinder, and a second warning sign docking hole provided on a lateral side of the fourth warning sign mounting frame and for inserting the second cylinder, the third warning sign mounting frame is provided with a third cylinder on a side away from the first warning sign docking hole, and the fourth warning sign mounting frame is provided with a fourth cylinder on a side away from the second warning sign docking hole.

[0009] Furthermore, a warning sign cleaning device for cleaning the warning light is provided on the top of the rectangular warning sign housing, and the warning sign cleaning device includes a first track provided on both sides of the top surface of the rectangular warning sign housing, a first outer cover slidably provided on the first track, a first rotating shaft rotatably provided inside the first outer cover, a first cylinder provided on the outside of the first rotating shaft, a first cleaning brush provided on the outside of the first cylinder, a worm gear provided at the rear end of the first rotating shaft, a worm provided at the top of the rectangular warning sign housing, a screw rod rotatably provided below the worm rod, a motor for driving the screw rod to rotate, a slider provided at the bottom of the first outer cover and cooperating with the screw rod, a first worm gear provided on the side of the first rotating shaft away from the worm gear, and a first worm gear meshing with the first worm gear. A second worm gear at the bottom, a third worm gear meshing with the second worm gear, a second rotating shaft arranged in the third worm gear, a second cleaning brush arranged outside the second rotating shaft, a second track arranged at the bottom of the front end surface of the rectangular warning sign shell, a moving block rotatably arranged at the bottom of the second rotating shaft, a guide frame arranged outside the moving block, a first spring arranged between the moving block and the guide frame, and a moving wheel arranged at the bottom of the guide frame and slidably connected to the second track, a limit block for meshing with the first worm gear, the second worm gear and the third worm gear is arranged in the first outer cover, a second spring is arranged between the limit block and the first outer cover, a water distribution pipe is arranged in the first outer cover, and a cleaning nozzle is arranged at the bottom of the water distribution pipe.

[0010] Furthermore, a third rotating shaft is provided on one side of the second spiral tooth, a second fan blade is provided on one side of the third rotating shaft, an extended shell is provided on the side of the first outer cover close to the second cleaning brush, the second fan blade is provided on the top of the extended shell, and a negative pressure channel is provided on the extended shell at the second cleaning brush.

[0011] Furthermore, reflective signs are attached to the front ends of the first warning sign, the second warning sign and the third warning sign.

[0012] Furthermore, the second warning sign mounting frame is a transparent panel.

[0013] By adopting the above technical solution, the beneficial effects of the present invention are:

[0014] This children's outdoor activity area safety warning sign is foldable. It is small when folded, but high when unfolded (it can be set as needed, generally set at a height of more than 1.1m, so it is not easy for children to climb over). When used outdoors, the solar cell component can maintain power to provide power for the warning light, human proximity sensor and speaker. When the human proximity sensor detects that a child is approaching, the speaker will beep to alert the security personnel or teacher. Together with the use of the first warning sign, the second warning sign and the third warning sign, it can effectively prevent children from climbing over the activity area. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a front view schematic diagram of the structure of the present invention in use state.

[0016] Figure 2 It is a front view schematic diagram of the structure of the first warning sign, the second warning sign and the third warning sign in the separated state of the present invention.

[0017] Figure 3 It is a schematic diagram of the rear end viewing angle of the first warning sign structure of the present invention.

[0018] Figure 4 It is a schematic diagram of the front view of the first warning sign structure of the present invention.

[0019] Figure 5 The present invention Figure 3 A in the figure is an enlarged structural diagram.

[0020] Figure 6 It is a schematic structural diagram of the first warning sign of the present invention in a folded state.

[0021] Figure 7 It is a front view schematic diagram of the third warning sign structure of the present invention.

[0022] Figure 8 It is a front view schematic diagram of the first warning sign and the warning sign cleaning device of the present invention in the use state structure.

[0023] Fig. 9 It is a front view schematic diagram of the local structure of the first warning sign of the present invention.

[0024] Fig.10 The present invention Figure 8 The enlarged structural diagram at B in FIG.

[0025] Fig.11 It is a structural schematic diagram of the warning sign cleaning device of the present invention.

[0026] Fig.12 It is a partial structural schematic diagram of the warning sign cleaning device of the present invention.

[0027] Fig.13 It is a schematic cross-sectional view of a local structure of a warning sign cleaning device of the present invention.

[0028] Fig.14 The present invention Fig.13 The enlarged structural diagram at C in the figure.

[0029] Fig.15 The present invention Fig.13 The enlarged structural diagram at D in the figure.

[0030] Fig.16 It is a schematic structural diagram of the first worm gear, the second worm gear and the third worm gear of the present invention in use state.

[0031] Numbers in the figure:

[0032] 100, first warning sign; 200, second warning sign; 300, third warning sign; 400, reflective sign; 1, warning sign support plate; 2, first warning sign base; 3, first warning sign mounting frame; 4, second warning sign mounting frame; 5, first hinge seat; 6, drive cylinder; 7, second hinge seat; 8, right-angle piece; 81, first hinge part; 82, second hinge part; 83, third hinge part; 9, first connecting rod; 10, second connecting rod; 11, first cylinder; 12, second cylinder; 13, second warning sign base; 14, third warning sign mounting frame; 15, fourth warning sign mounting frame; 16, first warning sign docking hole; 17, second warning sign docking hole; 18, third cylinder; 19, fourth cylinder; 20, third warning sign docking hole; 21, fourth warning sign docking hole; 22, warning sign cleaning device;

[0033] 101. Rectangular warning sign housing; 102. Solar cell module; 103. Warning light; 104. Human proximity sensor; 105. Speaker;

[0034] 201, first track; 202, first outer cover; 2021, water distribution pipe; 2022, cleaning nozzle; 203, first rotating shaft; 204, first cylinder; 205, first cleaning brush; 206, worm gear; 207, worm; 208, lead screw; 209, motor; 210, slider; 211, first worm gear; 212, second worm gear; 213, third worm gear; 214, second rotating shaft; 215, second cleaning brush; 216, second track; 217, moving block; 218, guide frame; 219, first spring; 220, moving wheel; 221, limit block; 222, second spring; 223, third rotating shaft; 224, second blade; 225, extension shell; 226, negative pressure channel; 200, first blade. DETAILED DESCRIPTION

[0035] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0036] refer to Figures 1 to 16 This embodiment provides a safety warning sign for children's outdoor activity areas, including a first warning sign 100, a second warning sign 200, and a plurality of third warning signs 300 disposed between the first warning sign 100 and the second warning sign 200.

[0037] The first warning sign 100 includes a warning sign support plate 1, a first warning sign base 2 arranged on the top surface of the warning sign support plate 1, a first warning sign mounting frame 3 hingedly arranged on the top surface of the first warning sign base 2, a second warning sign mounting frame 4 hingedly arranged on the side of the first warning sign mounting frame 3 away from the first warning sign base 2, a first hinge seat 5 arranged on one side of the front end surface of the first warning sign base 2, a drive cylinder 6 rotatably arranged between the first hinge seat 5 and the first warning sign mounting frame 3, a second hinge seat 7 arranged on the other side of the front end surface of the first warning sign base 2, a right-angle piece 8 rotatably arranged on the first warning sign mounting frame 3, a first hinge portion 81 arranged on the right-angle piece 8 and located at a right angle, and a right-angle piece 8 arranged on the right-angle piece 8. The second hinge part 82 and the third hinge part 83 which are far away from the right angle position, the first connecting rod 9 which is rotatably arranged on the right angle piece 8 between the second hinge part 82 and the second hinge seat 7, the second connecting rod 10 which is rotatably arranged between the third hinge part 83 on the right angle piece 8 and the second warning sign mounting frame 4, a rectangular warning sign housing 101 arranged on the top surface of the second warning sign mounting frame 4, a solar cell assembly 102 arranged on the top surface of the rectangular warning sign housing 101, a warning light 103 and a controller (not shown in the figure) arranged in the rectangular warning sign housing 101, a human proximity sensor 104 arranged on the front end surface of the rectangular warning sign housing 101, and a speaker 105 arranged on the right side of the rectangular warning sign housing 101.

[0038] The solar cell assembly 102 includes a solar panel, a voltage regulator and a battery. The solar panel is electrically connected to the battery through the voltage regulator.

[0039] The solar cell assembly 102, the warning light 103, the human proximity sensor 104 and the speaker 105 are electrically connected to the controller respectively. The above electronic components are all existing electronic devices and will not be described in detail here.

[0040] Before use, the push rod built into the driving cylinder 6 extends out to drive the first warning sign installation frame 3 to move upward. Since the right-angle piece 8 is rotatably connected to the first connecting rod 9, after the first warning sign installation frame 3 rotates upward by 90°, it is limited by the first connecting rod 9, and the right-angle piece 8 will rotate to the left. During the rotation of the right-angle piece 8, the second warning sign installation frame 4 is gradually driven by the second connecting rod 10 to rotate 180°, so that the second warning sign installation frame 4 is parallel to the first warning sign installation frame 3. When in use, since the second warning sign installation frame 4 and the first warning sign installation frame 3 form a high plane, it can prevent children from entering, and when not in use, it can be quickly and conveniently stored by lifting the driving cylinder 6. After folding, the first warning sign installation frame 3 and the second warning sign installation frame 4 occupy little space. After the first warning sign installation frame 3 and the second warning sign installation frame 4 are unfolded, the height is set to be above 1.1m, and it is not easy for children to climb over.

[0041] A first cylinder 11 is provided on one lateral side of the first warning sign mounting frame 3, a second cylinder 12 is provided on one lateral side of the second warning sign mounting frame 4, the third warning sign 300 includes a second warning sign base 13 provided on one lateral side of the first warning sign base 2, a third warning sign mounting frame 14 rotatably provided on the top surface of the second warning sign base 13, a fourth warning sign mounting frame 15 rotatably provided on the top surface of the third warning sign mounting frame 14, a first warning sign docking hole 16 provided on one lateral side of the third warning sign mounting frame 14 and used for inserting the first cylinder 11, and a second warning sign docking hole 17 provided on one lateral side of the fourth warning sign mounting frame 15 and used for inserting the second cylinder 12, the third warning sign mounting frame 14 is provided with a third cylinder 18 on a side away from the first warning sign docking hole 16, and the fourth warning sign mounting frame 15 is provided with a fourth cylinder 19 on a side away from the second warning sign docking hole 17.

[0042] The plurality of third warning signs 300 can be first connected together by the adjacent third cylinders 18 and the first warning sign docking holes 16, and then the fourth cylinder 19 at the top of the fourth warning sign mounting frame 15 is connected together with the second warning sign docking hole 17, and then the first warning sign docking hole 16 on the third warning sign mounting frame 14 at the leftmost position is matched with the first cylinder 11 on one side of the first warning sign mounting frame 3. The first warning sign 100 and the second warning sign 200 have the same structure. When the left side of the second warning sign 200 is provided with a third warning sign docking hole 17, the third warning sign docking hole 16 on the third warning sign mounting frame 14 at the leftmost position is matched with the first cylinder 11 on one side of the first warning sign mounting frame 3. The third warning sign docking hole 20 and the fourth warning sign docking hole 21 on the sign 300 where the third cylinder 18 and the fourth cylinder 19 are docked, the third cylinder 18 and the fourth cylinder 19 on one side of the third warning sign mounting frame 14 at the far right position are matched and connected with the third warning sign docking hole 20 and the fourth warning sign docking hole 21 on one side of the second warning sign 200, and the lifting and lowering of the first warning sign 100 and the second warning sign 200 will simultaneously drive the third warning sign 300 to lift and lower, and a corresponding number of third warning signs 300 can be placed according to the width of the activity area.

[0043] A warning sign cleaning device 22 for cleaning the warning light 103 is provided on the top of the rectangular warning sign housing 101. The warning sign cleaning device 22 includes a first track 201 provided on both sides of the top surface of the rectangular warning sign housing 101, a first outer cover 202 slidably provided on the first track 201, a first rotating shaft 203 rotatably provided inside the first outer cover 202, a first cylinder 204 provided on the outside of the first rotating shaft 203, a first cleaning brush 205 provided on the outside of the first cylinder 204, a worm gear 206 provided at the rear end of the first rotating shaft 203, a worm 207 provided on the top of the rectangular warning sign housing 101, A lead screw 208 is rotated below the worm 207, a motor 209 is used to drive the lead screw 208 to rotate, a slider 210 is arranged at the bottom of the first outer cover 202 and cooperates with the lead screw 208, a first worm gear 211 is arranged at the side of the first rotating shaft 203 away from the worm wheel 206, a second worm gear 212 is meshed with the bottom of the first worm gear 211, a third worm gear 213 meshed with the second worm gear 212, a second rotating shaft 214 is arranged in the third worm gear 213, a second cleaning brush 215 is arranged outside the second rotating shaft 214, and a second track is arranged at the bottom of the front end surface of the rectangular warning sign housing 101 216, a moving block 217 arranged at the bottom of the second rotating shaft 214, a guide frame 218 arranged outside the moving block 217, a first spring 219 arranged between the moving block 217 and the guide frame 218, and a moving wheel 220 arranged at the bottom of the guide frame 218 and slidably connected to the second track 216, a limiting block 221 for engaging with the first worm gear 211, the second worm gear 212 and the third worm gear 213 is arranged in the first outer cover 202, a second spring 222 is arranged between the limiting block 221 and the first outer cover 202, the center of the first worm gear 211 has an x-axis, The second worm tooth 212 has a y-axis line at its center, and the front-to-back direction of the x-axis line intersects with the left-to-right direction of the y-axis line at 90 degrees. The third worm tooth 213 has a z-axis line at its center, and the up-down direction of the z-axis line intersects with the front-to-back direction of the y-axis line at 90 degrees. A water distribution pipe 2021 is provided in the first outer cover 202, and a cleaning nozzle 2022 is provided at the bottom of the water distribution pipe 2021, so that the water distribution pipe 2021 can be connected to an external water pipe. During the cleaning process, the cleaning nozzle 2022 sprays and cleans the first cleaning brush 205 and the solar cell assembly 102 to improve the cleanliness of the solar cell assembly 102.

[0044] The warning sign cleaning device is set up. The warning device is usually placed at the construction site. The construction site is dusty. The dust on the surface of the warning light 103 is easy to reduce the brightness, making it difficult for passers-by to observe. The dust on the surface of the solar cell assembly 102 affects the power conversion efficiency. When in use, the motor 209 drives the screw rod 208 to rotate, and the screw rod 208 drives the slider 210 and the first outer cover 202 to move horizontally. During the horizontal movement of the first outer cover 202, the worm wheel 206 on one side of the first outer cover 202 and the fixed worm 207 The worm gear 206 rotates to drive the first rotating shaft 203 and the first cylinder 204 in the middle to rotate, and the first cylinder 204 drives the first cleaning brush 205 on the outside to rotate. The first cleaning brush 205 contacts the surface of the solar cell assembly 102 to clean the dust thereon, and the first cylinder 204 has a first fan blade 200. When the first cylinder 204 rotates, the first fan blade 200 also rotates synchronously. A negative pressure will be formed at the position of the first fan blade 200, so that the first cleaning brush inside the first outer cover 202 and outside the first cylinder 204 will be The dust in the first outer cover 202 is discharged by the first rotating shaft 203, and the dust in the first outer cover 202 is reduced. Since the first spiral gear 211, the second spiral gear 212 and the third spiral gear 213 are meshed with each other, the first rotating shaft 203 will drive the first spiral gear 211 to rotate, and the first spiral gear 211 drives the third spiral gear 213 to rotate through the second spiral gear 212, and the third spiral gear 213 rotates with the second rotating shaft 214, and the second rotating shaft 214 drives the second cleaning brush 215 on the outside to rotate. A second spring 222 is provided. Under the action of the second spring 222 and the first spring 219, the second cleaning brush 215 will move toward the rectangular warning sign housing 101, so that the second cleaning brush 215 is close to the front end surface of the rectangular warning sign housing 101. As the first outer cover 202 moves, the second cleaning brush 215 also moves with the first outer cover 202, and at the same time cleans the front end surface of the rectangular warning sign housing 101, avoiding the problem of excessive dust on the surface of the warning light 103 and the solar cell assembly 102.

[0045] Due to the arrangement of the first spring 219 and the second spring 222, the second cleaning brush 215 is easily worn or deformed after long-term use, resulting in poor fit with the rectangular warning sign housing 101. The first spring 219 presses the moving block 217 toward the rectangular warning sign housing 101, and the second spring 222 presses the limit block 221 toward the rectangular warning sign housing 101, so that the second cleaning brush 215 between the moving block 217 and the third spiral tooth 213 is closely attached to the rectangular warning sign housing 101, preventing the second cleaning brush 215 from deforming and unable to contact the front end surface of the first outer cover 202. A third rotating shaft 223 is provided on one side of the second spiral tooth 212. The third rotating shaft 22 A second blade 224 is provided on one side of the first outer cover 202, an extension shell 225 is provided on one side of the first outer cover 202 close to the second cleaning brush 215, the second blade 224 is provided on the top of the extension shell 225, and the extension shell 225 is provided with a negative pressure channel 226 at the second cleaning brush 215. With the arrangement of the second blade 224, during the cleaning process of the second cleaning brush 215, the second spiral tooth 212 rotates at the same time to suck and discharge the air in the negative pressure channel 226. Since the negative pressure channel 226 is located at the second cleaning brush 215, the dust adhered to the surface of the second cleaning brush 215 and the dust brushed by the second cleaning brush 215 can be adsorbed and cleaned.

[0046] The front ends of the first warning sign 100, the second warning sign 200 and the third warning sign 300 are attached with reflective signs 400 to warn passers-by and passing vehicles; the second warning sign mounting frame 4 is a transparent panel, which is convenient for people in the enclosed area to observe the surrounding situation through the warning signs.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A safety warning sign for children's outdoor activity areas, characterized in that: The invention comprises a first warning sign (100), a second warning sign (200), and a plurality of third warning signs (300) arranged between the first warning sign (100) and the second warning sign (200), wherein the first warning sign (100) comprises a warning sign support plate (1), a first warning sign base (2) arranged on the top surface of the warning sign support plate (1), a first warning sign installation frame (3) hingedly arranged on the top surface of the first warning sign base (2), a second warning sign installation frame (4) hingedly arranged on a side of the first warning sign installation frame (3) away from the first warning sign base (2), and a warning sign installation frame (5) arranged on the first warning sign support plate (1). A first hinge seat (5) on one side of the front end surface of the sign base (2), a drive cylinder (6) rotatably arranged between the first hinge seat (5) and the first warning sign mounting frame (3), a second hinge seat (7) arranged on the other side of the front end surface of the first warning sign base (2), a right-angle piece (8) rotatably arranged on the first warning sign mounting frame (3), a first hinge portion (81) arranged on the right-angle piece (8) and located at a right angle, a second hinge portion (82) and a third hinge portion (83) arranged on the right-angle piece (8) away from the right angle, and a hinge portion (84) rotatably arranged on the right-angle piece (8) at the second hinge portion (82). ) and a second hinge seat (7), a second connecting rod (10) rotatably disposed between a third hinge portion (83) on the right-angle piece (8) and the second warning sign mounting frame (4), a rectangular warning sign housing (101) disposed on the top surface of the second warning sign mounting frame (4), a solar cell assembly (102) disposed on the top surface of the rectangular warning sign housing (101), a warning light (103) and a controller disposed in the rectangular warning sign housing (101), a human proximity sensor (104) disposed on the front end surface of the rectangular warning sign housing (101), and a The speaker (105) on the right side of the warning sign housing (101) is driven by a push rod built into the cylinder (6) to extend and drive the first warning sign mounting frame (3) to move upward. Since the right-angle piece (8) is rotatably connected to the first connecting rod (9), after the first warning sign mounting frame (3) rotates upward by 90°, it is limited by the first connecting rod (9) and the right-angle piece (8) rotates to the left. During the rotation of the right-angle piece (8), the second warning sign mounting frame (4) is gradually driven to rotate by 180° through the second connecting rod (10), so that the second warning sign mounting frame (4) is parallel to the first warning sign mounting frame (3). A first cylinder (11) is provided on one lateral side of the first warning sign mounting frame (3), a second cylinder (12) is provided on one lateral side of the second warning sign mounting frame (4), the third warning sign (300) comprises a second warning sign base (13) provided on one lateral side of the first warning sign base (2), a third warning sign mounting frame (14) rotatably provided on the top surface of the second warning sign base (13), a fourth warning sign mounting frame (15) rotatably provided on the top surface of the third warning sign mounting frame (14), a first warning sign docking hole (16) provided on one lateral side of the third warning sign mounting frame (14) and used for inserting the first cylinder (11), and a second warning sign docking hole (17) provided on one lateral side of the fourth warning sign mounting frame (15) and used for inserting the second cylinder (12), the third warning sign mounting frame (14) being provided with a third cylinder (18) on a side away from the first warning sign docking hole (16), and the fourth warning sign mounting frame (15) being provided with a fourth cylinder (19) on a side away from the second warning sign docking hole (17).

2. A safety warning sign for children's outdoor activity areas according to claim 1, characterized in that: A warning sign cleaning device (22) for cleaning the warning light (103) is provided on the top of the rectangular warning sign housing (101), the warning sign cleaning device (22) comprising first tracks (201) provided on both sides of the top surface of the rectangular warning sign housing (101), a first outer cover (202) slidably provided on the first tracks (201), a first rotating shaft (203) rotatably provided inside the first outer cover (202), a first cylinder (204) provided outside the first rotating shaft (203), and a first cleaning brush (203) provided outside the first cylinder (204). 05), a worm wheel (206) disposed at the rear end of the first rotating shaft (203), a worm (207) disposed at the top of the rectangular warning sign housing (101), a screw (208) disposed below the worm (207) for rotating, a motor (209) for driving the screw (208) to rotate, a slider (210) disposed at the bottom of the first outer cover (202) and cooperating with the screw (208), a first worm tooth (211) disposed at a side of the first rotating shaft (203) away from the worm wheel (206), and a second worm tooth (211) meshing with the bottom of the first worm tooth (211). 12), a third worm gear (213) meshing with the second worm gear (212), a second rotating shaft (214) disposed in the third worm gear (213), a second cleaning brush (215) disposed outside the second rotating shaft (214), a second track (216) disposed at the bottom of the front end surface of the rectangular warning sign housing (101), a moving block (217) rotatably disposed at the bottom of the second rotating shaft (214), a guide frame (218) disposed outside the moving block (217), and a first spring (219) disposed between the moving block (217) and the guide frame (218). ), and a moving wheel (220) disposed at the bottom of the guide frame (218) and slidably connected to the second track (216); a limit block (221) for engaging with the first worm gear (211), the second worm gear (212) and the third worm gear (213) is disposed in the first outer cover (202); a second spring (222) is disposed between the limit block (221) and the first outer cover (202); a water distribution pipe (2021) is disposed in the first outer cover (202); and a cleaning nozzle (222) is disposed at the bottom of the water distribution pipe (2021).

3. A safety warning sign for children's outdoor activity areas according to claim 2, characterized in that: A third rotating shaft (223) is provided on one side of the second spiral tooth (212), a second fan blade (224) is provided on one side of the third rotating shaft (223), an extension shell (225) is provided on the side of the first outer cover (202) close to the second cleaning brush (215), the second fan blade (224) is arranged on the top of the extension shell (225), and a negative pressure channel (226) is provided on the extension shell (225) at the second cleaning brush (215).

4. A safety warning sign for children's outdoor activity areas according to claim 1, characterized in that: The front ends of the first warning sign (100), the second warning sign (200) and the third warning sign (300) are bonded with a reflective sign (400).

5. A safety warning sign for children's outdoor activity areas according to claim 4, characterized in that: The second warning sign mounting frame (4) is a transparent panel.

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