Self-cleaning lawn lamp for humidity environment

Abstract

The self-cleaning lawn lamp comprises a base fixed to the ground, a main body arranged on the periphery of the base in a sleeving mode and a top cover connected to the top of the main body in a liftable mode, a light source assembly and a driving mechanism are arranged in the main body, a scraping and cleaning mechanism comprises a bistable elastic beam and a scraping piece, the bistable elastic beam is in a pre-bent S shape, and the scraping piece is arranged in the bistable elastic beam. The fixed end is fixedly connected to the inner wall of the main body, and the free end penetrates through the wall of the main body, extends to the outside and enables the scraper to abut against the cleaned surface of the base; the bistable elastic beam is made of a high-elasticity material and has two stable balance states including a fitting state and a separating state, the driving mechanism comprises a triggering part, and when the main body descends to the closed position, the triggering part arranged on the driving mechanism acts on a wave crest area of the bistable elastic beam, so that the bistable elastic beam is subjected to buckling transition; and a guiding structure is arranged on the inner wall of the main body and below the main body, and the bistable elastic beam is reset to the attaching state under the action of the guiding structure.

Description

Technical Field

[0001] This invention relates to the field of lighting equipment technology, and in particular to a self-cleaning lawn light for use in humid environments. Background Technology

[0002] In coastal areas and rainy or humid southern regions, the metal bases of outdoor lawn lights are constantly exposed to moist air, making them highly susceptible to rust, salt crystallization, or mold. Traditional lawn lights have a closed structure, making it impossible to maintain the outer perimeter of the base, which can lead to jamming of the lifting mechanism, deterioration of the appearance, and even affect the automatic nighttime activation function.

[0003] In existing technologies, some lamps use waterproof coatings or sacrificial anodes for corrosion protection, but these cannot solve the problem of existing deposits; other solutions add manual cleaning ports, but the operation is cumbersome and goes against the original intention of smart lighting. Summary of the Invention

[0004] The purpose of this invention is to provide a self-cleaning lawn light for humid environments, which solves the technical problem of difficult-to-clean deposits formed on the main body of damp lawns.

[0005] According to one aspect of the present invention, a self-cleaning lawn light for humid environments is provided, comprising a base fixed to the ground, a main body sleeved around the outer periphery of the base, and a top cover vertically connected to the top of the main body, wherein the interior of the main body is hollow, characterized in that: The outer circumferential surface of the base is provided with a surface to be cleaned; The main body is equipped with a light source assembly and a drive mechanism. The drive mechanism is used to control the top cover to rise at night and drive the main body to rise relative to the base, and to control the top cover to fall during the day and drive the main body to fall and close. The bottom of the main body is provided with a scraping and cleaning mechanism, which includes a bistable elastic beam and a scraper. The bistable elastic beam is pre-bent S-shaped, with its fixed end fixed to the inner wall of the main body and its free end extending through the main body wall to the outside, so that the scraper abuts against the surface of the base to be cleaned. The bistable elastic beam is made of a highly elastic material and has two stable equilibrium states: a fitted state and a disengaged state. The drive mechanism includes a trigger part. When the main body descends to the closed position, the trigger part on the drive mechanism acts on the crest region of the bistable elastic beam, causing it to buckle and switch from the fitted state to the disengaged state. A guide structure is provided on the inner wall and below of the main body. Under the action of the guide structure, the bistable elastic beam resets to the fitted state, thereby achieving scraping and cleaning of the outer circumference of the base and self-resetting in each lifting cycle.

[0006] Preferably, the outer circumferential surface of the base is provided with an external thread section, and the inner wall of the main body is provided with an internal thread that mates with it; the driving mechanism includes a dual-head motor, the first output end of which is connected to a first threaded rod to drive the top cover to rise and fall, and the second output end is connected to a second threaded rod, the second threaded rod being rotated and supported by the base, and driving the main body to rotate and rise and fall through the threaded pair.

[0007] Preferably, the bottom of the top cover is provided with at least two downwardly extending legs, which are slidably inserted into the vertical grooves on the outer wall of the main body. When the top cover is raised, the vertical grooves are exposed to form an observation window. A transparent protective plate is embedded in the vertical grooves to prevent foreign objects from entering.

[0008] Preferably, the second threaded rod is provided with a trigger arm that is threadedly engaged with it. The trigger arm is a trigger part, and the path of the outward protrusion of the trigger arm can reach the crest of the S-shape, triggering buckling transition to form an inverse S-shape.

[0009] Preferably, the upper outer periphery of the base is provided with an annular guide slope. During the initial stage of the body's ascent, the free end of the bistable elastic beam contacts the guide slope and is reset to a fitted state under its guiding action.

[0010] Preferably, the main body is provided with a mosquito-killing component, which includes a fan and a mosquito bag. The fan is installed inside the main body, and the top of the main body serves as the air inlet of the fan. The fan blows air downwards along the inside of the main body. The light source component includes a mosquito-attracting lamp. The top of the main body forms a negative pressure zone between the main body and the top cover through the fan. The bottom of the main body is movably connected to the base, and the outer side of the base is provided with multiple ventilation holes.

[0011] Preferably, the outer side of the main body is provided with a hatch for taking out and installing the mosquito bag.

[0012] Preferably, a solar panel is provided on the top of the top cover, and a storage battery is provided inside the main body, which is electrically connected to the storage battery through a charging management module.

[0013] Preferably, the inner side of the base is provided with a ventilation grid, and the top and outer sides of the ventilation grid are provided with spacing grooves.

[0014] The beneficial effects of this invention are: This invention utilizes a self-cleaning mechanism at the bottom of the lawn light's main body, consisting of a bistable elastic beam and a scraper. This mechanism, along with a guide slope on the base and a trigger part of the drive mechanism, enables an intelligent cycle where the light automatically scrapes once when raised and automatically lifts when lowered. During the day, when the light is closed, the scraper automatically detaches from the base, preventing it from rusting and jamming due to prolonged pressure. At night, when the light is raised, the scraper is pushed back into its contact position by the guide slope, scraping away water stains, salt deposits, and mold from the outer circumference of the base as it rises. The entire process requires no electricity or additional parts; it relies entirely on the self-linking structure, achieving true daily automatic cleaning that becomes cleaner with use. This makes it particularly suitable for damp, rainy, or coastal outdoor environments prone to rusting, significantly extending the lawn light's lifespan and enhancing its aesthetic appeal. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the unfolded three-dimensional structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of a closed three-dimensional structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the planar structure of an embodiment of the present invention; Figure 4 This is a cross-sectional structural diagram of an embodiment of the present invention; Figure 5 This is a partial structural diagram of the base according to an embodiment of the present invention.

[0016] In the diagram: 1. Base; 2. Main body; 3. Top cover; 4. Surface to be cleaned; 5. Light source assembly; 6. Drive mechanism; 7. Bistable elastic beam; 8. Annular guide ramp; 9. Trigger; 10. Ventilation grid; 11. Support leg; 12. Vertical groove; 13. Transparent protective plate; 14. Fan; 15. Insect bag; 16. Door; 17. Solar panel; 18. Battery. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention. Please see Figure 1-5 As shown, this invention provides a self-cleaning lawn light for humid environments, comprising a base 1 fixed to the ground, a main body 2 sleeved around the outer periphery of the base 1, and a top cover 3 vertically connected to the top of the main body 2. The interior of the main body 2 is hollow. The outer peripheral surface of the base 1 is provided with a surface 4 to be cleaned; The main body 2 is provided with a light source assembly 5 and a drive mechanism 6. The drive mechanism 6 is used to control the top cover 3 to rise at night and drive the main body 2 to rise relative to the base 1, and to control the top cover 3 to fall during the day and drive the main body 2 to fall and close. The bottom of the main body 2 is provided with a scraping and cleaning mechanism, which includes a bistable elastic beam 7 and a scraper. The bistable elastic beam 7 is pre-bent S-shaped, with its fixed end fixed to the inner wall of the main body 2 and its free end extending through the wall of the main body 2 to the outside, so that the scraper abuts against the surface 4 of the base 1 to be cleaned. The bistable elastic beam 7 is made of a highly elastic material and has two stable equilibrium states: a fitted state and a disengaged state. The drive mechanism 6 includes a trigger part 9. When the main body 2 descends to the closed position, the trigger part 9 on the drive mechanism 6 acts on the crest region of the bistable elastic beam 7, causing it to buckle and switch from the fitted state to the disengaged state. The inner wall and lower part of the main body 2 are provided with an annular guide slope 8. Under the action of the annular guide slope 8, the bistable elastic beam 7 resets to the fitted state, thereby achieving scraping and cleaning of the outer circumference of the base 1 and self-resetting in each lifting cycle. The base 1 is made of stainless steel or aluminum alloy, and its outer surface is treated with sandblasting or micro-arc oxidation to form a cleanable surface 4 with a roughness Ra=1.6~3.2μm, which facilitates the removal of attached substances. The main body 2 is a cylindrical hollow shell with openings at both ends to form airflow channels. The light source assembly 5 includes a white LED lighting module and an ultraviolet mosquito-attracting light source, which is automatically turned on and off by the controller according to the photosensitive sensor signal. The drive mechanism 6 is electrically connected to the control system. When the ambient light intensity is higher than 50 lux during the day, the drive mechanism 6 reverses to execute the closing program; when it is lower than 10 lux at night, it rotates forward to execute the opening program. The bistable elastic beam 7 is integrally stamped from spring steel or beryllium bronze with a thickness of 0.5–1.2 mm. Its pre-bent S-shaped configuration is shaped by heat treatment to ensure that it remains stably in a fitted state when there is no external force. Under the action of critical load 2–6 N, it undergoes a sudden buckling transition. The "guide structure" is specifically an annular guide ramp 8 set on the upper outer periphery of the base 1. It is used to apply a lateral constraint force to the free end in the early stage of the body 2's rise, prompting it to cross the energy barrier and return to the fitted state. This design avoids the fatigue failure problem of traditional spring reset mechanism and realizes a fully mechanical self-reset.

[0020] The outer circumferential surface of the base 1 is provided with an external thread section, and the inner wall of the main body 2 is provided with an internal thread that mates with it; the drive mechanism 6 includes a dual-head motor, the first output end of which is connected to a first threaded rod to drive the top cover 3 to rise and fall, and the second output end is connected to a second threaded rod, the second threaded rod being supported by the base 1 and driving the main body 2 to rotate and rise and fall through the threaded pair; The outer thread section of the base 1 is a trapezoidal thread, with an effective length not less than 1 / 3 of the height of the main body 2, to ensure sufficient lifting stroke and good self-locking. The inner thread of the main body 2 is precisely matched with it, and the two form a helical transmission pair. The dual-head motor is a waterproof DC geared motor, installed on the central support inside the main body 2. The first threaded rod is a fine-pitch screw, which cooperates with the nut seat at the bottom of the top cover 3 to achieve vertical lifting. The second threaded rod is a coarse-pitch screw, and its lower end is supported in the center hole of the base 1 through a deep groove ball bearing or an oil-impregnated copper sleeve, forming a rotation support point. The upper end is connected to the motor output shaft through a coupling. When the motor rotates forward, the first threaded rod pushes the top cover 3 to rise, and at the same time, the second threaded rod drives the main body 2 to rise synchronously along the outer thread of the base 1. When rotating in reverse, they fall synchronously to close. This dual-path independent transmission design ensures that the movement of the top cover 3 and the main body 2 is coordinated and avoids interference.

[0021] The top cover 3 has at least two downward-extending support legs 11 at its bottom. The support legs 11 are slidably inserted into the vertical grooves 12 on the outer wall of the main body 2. When the top cover 3 is raised, the vertical grooves 12 are exposed to form an observation window. A transparent protective plate 13 is embedded in the vertical grooves 12. The support legs 11 are two or three symmetrically distributed cylindrical guide rods made of stainless steel or fiberglass reinforced nylon. Their outer diameter is fitted with the vertical groove 12 to ensure smooth sliding and prevent shaking. The vertical groove 12 is axially opened along the outer wall of the main body 2, and the edges of the groove are rounded to prevent stress concentration. The transparent protective plate 13 is a 3-5mm thick transparent acrylic plate or polycarbonate plate, which is fixed to the inside of the groove by buckles or silicone sealing rings. This allows users to see the status of the mosquito bag 15 inside while preventing rainwater, insects or dust from entering the interior of the main body 2 through gaps. The observation window is fully exposed when the top cover 3 is fully raised, which is convenient for maintenance.

[0022] The second threaded rod is provided with a trigger arm that is threadedly engaged with it. The trigger arm is a trigger part 9. The path of the outward protrusion of the trigger arm can reach the crest of the S-shape, triggering buckling transition to form an inverse S-shape. The trigger part 9 is a ring nut structure with its internal thread matching the second threaded rod. The outer circumference is integrally formed with a radially extending trigger arm. The end of the trigger arm is a rounded transition surface to avoid damaging the bistable elastic beam 7. When the main body 2 descends to the lowest closed position, the trigger part 9 descends with the second threaded rod to the end of the stroke. Its trigger arm is exactly above the crest of the middle part of the bistable elastic beam 7 and applies a vertically downward impact load, causing the beam to become unstable instantly, transitioning from the contact state in a positive S-shape to the disengagement state in a reverse S-shape, eliminating long-term contact friction. This triggering timing is precisely controlled by the stroke of the threaded pair, without the need for an additional limit switch.

[0023] The base 1 has an annular guide slope 8 on its upper outer periphery. When the main body 2 rises in the initial stage, the free end of the bistable elastic beam 7 contacts the annular guide slope 8 and is reset to the fitting state under its guiding action. The annular guide ramp 8 is machined on the upper outer edge of the base 1. When the system is started at night and the main body 2 begins to rise, the free end of the bistable elastic beam 7 is in a reverse S-shaped retracted state and slides into the ramp from below. The ramp applies a normal component force to the free end, pushing it inward. When the displacement exceeds the critical value, the elastic potential energy stored in the beam is released, and it automatically rebounds to the fitting state in a positive S-shape. The scraper re-abuts the surface of the base 1. This process is a purely mechanical passive guide, requiring no power source, with high reliability, and avoids the aging problem of the return spring. Traditional outdoor lawn lights that integrate mosquito-killing functions often face two major challenges: first, the mosquito traps are susceptible to dampness and caking in high-humidity environments, leading to a significant increase in airflow resistance and a sharp drop in mosquito-catching efficiency; second, during the day without protection, large particles such as leaves and catkins easily fall into the mosquito trap through the air inlet, causing blockages. Existing solutions mostly employ all-weather ventilation designs, which can maintain airflow but cannot simultaneously address both moisture prevention and blockage prevention.

[0024] To address this, the present invention cleverly solves the aforementioned problems by deeply linking the mosquito-killing component with the lifting and lowering action of the top cover: the complete airflow channel is only opened at night when the top cover is raised, achieving efficient mosquito trapping; during the day, after the top cover is lowered and closed, the bottom of the main body fits tightly with the base, essentially sealing the airflow inlet and outlet, keeping the mosquito bag in a dry and sealed environment, effectively preventing moisture intrusion and foreign object blockage, thus maintaining stable and reliable mosquito-killing performance in high-humidity outdoor environments for a long time. Specifically: The main body 2 is equipped with a mosquito-killing component, which includes a fan 14 and a mosquito bag 15. The fan 14 is installed inside the main body 2, and the top of the main body 2 serves as the air inlet of the fan 14. The fan 14 blows air downwards along the inside of the main body 2. The light source component 5 includes a mosquito-attracting lamp. The top of the main body 2 forms a negative pressure zone between the main body 2 and the top cover 3 through the fan 14. The bottom of the main body 2 is movably connected to the base 1. The outer side of the base 1 is provided with multiple ventilation holes 10. The fan 14 is a low-noise axial flow fan, installed in the upper bracket inside the main body 2. The mosquito-attracting lamp is a 365nm ultraviolet LED with a power of 1-3W, integrated with the white LED in the same light source module. At night, after the top cover 3 is raised, the fan 14 starts, and air is drawn in from the air inlet at the top of the main body 2, forming a local negative pressure zone between the top cover 3 and the top of the main body 2. The air flows downward through the suspended non-woven mosquito bag 15 with a pore size ≤100μm, where mosquitoes are intercepted. Clean air enters the base 1 cavity from the bottom opening of the main body 2 and is finally discharged from the 8-12 Φ3-5mm ventilation holes 10 evenly distributed around the outside of the base 1. During the day, after closing, the main body 2 lowers to close the bottom opening, the ventilation holes 10 are blocked, and the whole machine is in a sealed state, effectively preventing rain and moisture.

[0025] The outer side of the main body 2 is provided with a hatch 16 for taking out and installing mosquito bags 15. The hatch 16 is a rectangular or circular inspection port, located in the lower middle part of the outer side of the main body 2, and is connected to the main body 2 by hinges or buckles. Users can open the hatch 16 periodically to take out the mosquito bags 15 for cleaning or replacement, which is easy to operate.

[0026] A solar panel 17 is provided on the top of the top cover 3, and a storage battery 18 is provided inside the main body 2, which is electrically connected to the storage battery 18 through a charging management module. The top of the top cover 3 integrates a monocrystalline silicon solar panel 17, which is electrically connected to a lithium iron phosphate battery 18 inside the main body 2. It achieves energy self-sufficiency through a charging management module. The solar panel 17 is a monocrystalline silicon photovoltaic panel with a power of 5-10W. It is encapsulated on the curved surface of the top of the top cover 3 and the surface is covered with hydrophobic glass for self-cleaning. The battery 18 is a lithium iron phosphate battery with a capacity of 5000-10000mAh. It is installed in a waterproof box inside the main body 2. The charging management module integrates MPPT maximum power point tracking, overcharge / over-discharge protection, and DC-DC voltage regulation. It converts solar energy into 12V DC power to power the light source component 5, fan 14, and drive mechanism 6, achieving all-weather energy self-sufficiency. It is suitable for garden scenes without mains power access.

[0027] A ventilation grille 10 is provided on the inner side of the base 1, and the top and outer sides of the ventilation grille 10 are provided with slotted grooves. The ventilation grille 10 is installed inside the base 1 as a barrier. Larger debris can be removed from the outer surface of the base 1 through the ventilation holes, and the slotted grooves of the ventilation grille 10 allow air to flow to the ventilation holes of the base 1, creating a convection space. Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-cleaning lawn light for humid environments, comprising a base fixed to the ground, a main body sleeved around the outer periphery of the base, and a top cover vertically connected to the top of the main body, wherein the interior of the main body is hollow, characterized in that: The outer circumferential surface of the base is provided with a surface to be cleaned; The main body is equipped with a light source assembly and a drive mechanism. The drive mechanism is used to control the top cover to rise at night and drive the main body to rise relative to the base, and to control the top cover to fall during the day and drive the main body to fall and close. The bottom of the main body is provided with a scraping and cleaning mechanism, which includes a bistable elastic beam and a scraper. The bistable elastic beam is pre-bent S-shaped, with its fixed end fixed to the inner wall of the main body and its free end extending through the main body wall to the outside, so that the scraper abuts against the surface of the base to be cleaned. The bistable elastic beam is made of a highly elastic material and has two stable equilibrium states: a fitted state and a disengaged state. The driving mechanism includes a triggering part. When the main body descends to the closed position, the triggering part on the driving mechanism acts on the crest region of the bistable elastic beam, causing it to buckle and switch from the fitted state to the disengaged state. The inner wall and lower part of the main body are provided with a guide structure. Under the action of the guide structure, the bistable elastic beam returns to the fitted state.

2. The self-cleaning lawn light for humid environments according to claim 1, characterized in that, The outer circumferential surface of the base is provided with an external thread section, and the inner wall of the main body is provided with an internal thread that mates with it; the driving mechanism includes a dual-head motor, the first output end of which is connected to a first threaded rod to drive the top cover to rise and fall, and the second output end is connected to a second threaded rod, the second threaded rod being rotated and supported by the base, and driving the main body to rotate and rise and fall through the threaded pair.

3. The self-cleaning lawn light for humid environments according to claim 2, characterized in that, The top cover has at least two downward-extending legs at its bottom. The legs are slidably inserted into vertical grooves on the outer wall of the main body. When the top cover is raised, the vertical grooves are exposed to form observation windows. A transparent protective plate is embedded in the vertical grooves.

4. The self-cleaning lawn light for humid environments according to claim 2, characterized in that, The second threaded rod is provided with a trigger arm that is threadedly engaged with it. The trigger arm is a trigger part. The path of the outward protrusion of the trigger arm can reach the crest of the S-shape, triggering buckling transition to form an inverse S-shape.

5. The self-cleaning lawn light for humid environments according to claim 4, characterized in that, The upper outer periphery of the base is provided with an annular guide slope. During the initial stage of the body's ascent, the free end of the bistable elastic beam contacts the guide slope and is reset to a fitted state under its guiding action.

6. The self-cleaning lawn light for humid environments according to claim 3, characterized in that, The main body is equipped with a mosquito-killing component, which includes a fan and a mosquito bag. The fan is installed inside the main body, and the top of the main body serves as the air inlet for the fan. The fan blows air downwards along the inside of the main body. The light source component includes a mosquito-attracting lamp. The top of the main body forms a negative pressure zone between the main body and the top cover through the fan. The bottom of the main body is movably connected to the base, and the outer side of the base has multiple ventilation holes.

7. The self-cleaning lawn light for humid environments according to claim 6, characterized in that, The outer side of the main body has a hatch for taking out and installing mosquito bags.

8. The self-cleaning lawn light for humid environments according to claim 1, characterized in that, A solar panel is installed on the top of the cover, and a battery is installed inside the main body, which is electrically connected to the battery through a charging management module.

9. The self-cleaning lawn light for humid environments according to claim 6, characterized in that, The base has a ventilation grid on its inner side, and the top and outer sides of the ventilation grid are provided with slotted grooves.

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