A sweeper with a garbage can automatic closing structure

Abstract

The application discloses a sweeper with a garbage can automatic closing structure and relates to the technical field of cleaning equipment. The sweeper comprises a sweeper body, a garbage can which is detachably assembled on the sweeper body, and a baffle which is vertically slidably installed at a garbage inlet of the garbage can and partially blocks the garbage inlet. The baffle has at least two position states, i.e., the baffle is slid to the lower part and blocks the lower part of the garbage inlet, and the baffle is slid to the middle part and / or the upper part and blocks the middle part and / or the upper part of the garbage inlet. The problem that garbage is scattered in the process of taking out the garbage can and causes secondary pollution of the ground or the sweeper body due to the lack of blockage of the garbage inlet of the garbage can is solved.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment, and more particularly to a sweeper with an automatic dustbin closing mechanism. Background Technology

[0002] Most existing sweepers use an open or semi-open design for the dustbin's roller brush inlet. When emptying the dustbin, it needs to be lifted out of the sweeper for disposal. During this process, the lack of obstruction causes debris to spill out, resulting in secondary pollution of the floor or the sweeper itself. This also inconveniences operators and reduces cleaning efficiency.

[0003] Therefore, there is an urgent need for a new type of sweeper with an automatic trash can closing mechanism to solve the above-mentioned defects. Summary of the Invention

[0004] The purpose of this invention is to provide a sweeper with an automatic trash can closing structure to solve the problem that when current sweepers extract trash cans, the trash spills out during the extraction process due to the lack of obstruction at the trash can opening, causing secondary pollution to the ground or the sweeper itself.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A sweeper with an automatic dustbin closing structure includes a sweeper body and a dustbin detachably mounted on the sweeper body. The dustbin has a dust inlet on at least one side, and a baffle that is vertically slidably installed at at least one dust inlet to block the dust inlet. The baffle has at least two position states: the baffle slides to the lower part and blocks the lower part of the dust inlet; the baffle slides to the middle and / or upper part and blocks the middle and / or upper part of the dust inlet.

[0007] Optionally, the sweeper body has a pusher portion corresponding to the baffle, and the baffle has at least two positional states:

[0008] When the garbage bin is loaded into the sweeper body, the push part of the sweeper body pushes the baffle, causing the baffle to slide to the middle and / or the top and block the middle and / or the top of the garbage inlet.

[0009] When the trash can detaches from the sweeper body, the baffle disengages from the push of the top pusher, slides to the bottom and blocks the bottom of the trash inlet;

[0010] Optionally, the trash can is provided with a guide limiting component vertically at the trash inlet, and the baffle is slidably disposed on the guide limiting component. The guide limiting component consists of guide posts and / or guide grooves respectively disposed vertically on both sides of the trash inlet, and the two sides of the baffle are slidably disposed on the guide posts and / or guide grooves respectively.

[0011] More preferably, the guide limiting component has two sets and is respectively arranged on both sides of the garbage inlet. The guide limiting component can adopt a guide column structure, or it can be without guide columns, and guide grooves can be directly opened vertically on both sides of the garbage inlet. The two sides of the baffle can be directly designed as hooks or covering structures, and the hooks or covering structures on both sides are slidably arranged in the guide grooves on both sides of the garbage inlet.

[0012] Optionally, a reset drive assembly is provided between the garbage bin and the baffle. The reset drive assembly is used to drive the baffle to slide down and block the lower part of the garbage inlet when the baffle is released from the pushing constraint of the pushing part.

[0013] The reset drive assembly includes a spring and a spring receiving cavity arranged vertically. A guide groove is provided on the side wall of the spring receiving cavity along the vertical direction. The baffle has a limiting protrusion, and the limiting protrusion extends into the spring receiving cavity through the guide groove. The spring is placed in the spring receiving cavity and is compressed vertically between the upper end of the spring receiving cavity and the limiting protrusion.

[0014] And / or, the spring tension is positioned between the lower end of the spring receiving cavity and the limiting protrusion.

[0015] In a further preferred embodiment, the upper end of the limiting protrusion has an anti-disengagement ring or flange structure arranged circumferentially, and the lower end of the spring is sleeved on the anti-disengagement ring or flange structure.

[0016] More preferably, the reset drive assembly has two sets and is respectively disposed on both sides of the waste inlet, the guide groove on the spring receiving cavity is opened on the side opposite to the waste inlet, and the limiting protrusion is disposed in the middle of both sides of the baffle 22 rather than the lower part.

[0017] Optionally, the lower end of the spring has an adjustable preload threaded preload structure, specifically including: a through threaded hole is provided at the lower end of the spring receiving cavity, a preload part is screwed into the threaded hole, the upper end of the preload part is located in the spring receiving cavity, and the lower end of the spring is locked on the preload part, the upper end of the preload part has an anti-disengagement ring or flange structure arranged circumferentially, and the lower end of the spring is sleeved on the anti-disengagement ring or flange structure.

[0018] One end of the spring has an adjustable preload threaded preload structure, specifically including: a through threaded hole is provided at the end of the spring receiving cavity along the spring axis, a preload part is screwed into the threaded hole, and one end of the spring is limited on the preload part;

[0019] The limiting protrusion has a through threaded hole along the spring axis, and a preload is screwed into the threaded hole. One end of the spring is limited to the preload. By rotating the preload, the initial compression / initial tension of the spring can be adjusted to compensate for the elasticity decay after long-term fatigue use and extend the service life of the whole machine. Correspondingly, if the preload is screwed into the threaded hole of the limiting protrusion, the operator's hand or tool can be entered into the spring cavity to adjust the screwing position of the preload by means of the guide groove on the side wall of the spring receiving cavity or by opening a hole at the end of the spring receiving cavity.

[0020] In a further preferred embodiment, a damping structure is added to the spring or guide limiting assembly.

[0021] Optionally, to reduce closing noise and improve sealing effect, the upper and / or lower ends of the baffle have elastic buffer sections.

[0022] Optionally, the baffle is a single-layer, double-layer, or double-layer structure. When the baffle is a double-layer or double-layer structure, at least one baffle is positioned to fix and block the middle and / or upper part of the garbage inlet. At least one baffle has at least two position states: the baffle slides to the lower part and blocks the lower part of the garbage inlet; the baffle slides to the middle and / or upper part and blocks the middle and / or upper part of the garbage inlet.

[0023] Optionally, the sweeper body has a dustbin assembly slot, and the dustbin is slidably mounted vertically in the upper dustbin assembly slot:

[0024] When the garbage bin is inserted vertically downwards into the sweeper body, the push part of the sweeper body pushes the baffle, causing the baffle to slide to the middle and / or upper part and block the middle and / or upper part of the garbage inlet.

[0025] When the trash can is lifted vertically upwards and detached from the sweeper body, the baffle disengages from the push of the top pusher, slides down to the bottom, and blocks the bottom of the trash inlet.

[0026] Optionally, at least one entire side of the trash can may be an open trash inlet.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. Eliminates secondary pollution from garbage and significantly improves cleaning efficiency. When the garbage bin is pulled out from the main unit, the baffle automatically seals the garbage inlet, preventing debris, mud, and dust from scattering or flying during dumping and transportation. This avoids garbage falling onto the sweeper body or the already cleaned ground, eliminating secondary cleaning work and eliminating hygiene and dust hazards. At the same time, the opening of the bin can be completely closed or the bottom can be closed separately, making higher use of the internal space of the garbage bin and increasing the effective volume of the open garbage bin, preventing garbage from collapsing and overflowing.

[0029] The entire process is automatic, requiring no manual operation, making it convenient to use. When the trash can is inserted into the main unit, the baffle is automatically raised and the trash inlet is opened by the push-pull structure of the machine body; when it is removed, the reset component automatically falls and seals it. The entire disassembly, assembly, and dumping process does not require any additional manual flipping or snapping actions, making operation simple and labor-saving, and providing a better human-machine interaction experience. Especially when used with the reset drive component, if the driving force of the reset drive component is large enough, and the lower part of the opening of the trash can is closed separately, not only is there no need to manually operate the baffle or other lid structure when removing the trash can, but when dumping the trash, since the trash can is still in a partially open state, the trash can can be dumped directly, making dumping convenient; or, after flipping the trash can, the trash can is dumped out from the upper opening of the trash can (after flipping the trash can, the opening becomes a lower opening and the upper closed) for a cleaner dumping;

[0030] It is suitable for dumping in multiple scenarios, has a high tolerance for operational errors, and does not require careful and stable handling of the trash can. Even if the can is tilted or shaken, the internal trash will not leak out from the tail opening, thus lowering the threshold for dumping operations.

[0031] 2. The entire front and / or rear side of the trash can is an open trash inlet, which, together with a sliding baffle that partially blocks the trash inlet, allows the trash can to be emptied / washed extremely cleanly without leaving any dead corners.

[0032] 3. When cleaning, the baffle should block the middle or upper part of the garbage inlet, especially the upper part of the garbage inlet, so that the dust airflow mainly circulates inside the garbage bin and eventually settles inside the garbage bin, avoiding or reducing the dust in the garbage bin from drifting out through the garbage inlet.

[0033] 4. Multiple noise reduction structures reduce closing impact noise. TPE elastic buffers are installed at the upper and lower edges of the baffle, with hard plastic contacting flexible cushioning to eliminate abnormal noise from the impact between the baffle and the housing. Optional friction sleeves and damping structures can be added to dissipate the kinetic energy released by the spring, slowing the baffle's descent speed and significantly reducing closing impact noise, suitable for the needs of quiet household models. The elastic buffer components improve sealing performance; the buffer strips at the edge of the baffle can elastically deform, ensuring a tight fit against the housing even if small debris or fibers are present on the contact surface, sealing gaps and preventing dust and slag leakage.

[0034] 5. Multiple structural derivative solutions to adapt to different cost models: the guide structure offers guide column type, sliding groove hook simplified type and other structures; the reset structure offers spring composite drive and springless pure gravity low-cost solutions; the baffle supports single-layer / multi-layer composite structure, which can be flexibly selected according to product positioning and cost, and is suitable for high-end garden sweepers and affordable household cleaning robots. It can be adapted to the outdoor cleaning conditions of gardens with a lot of mud, sand, branches and leaves, and damp conditions, and is also suitable for indoor household dry dust cleaning scenarios; the isolated spring cavity and wear-resistant guide structure can cope with the harsh environment of dusty conditions for a long time and adapt to the use needs of high frequency of disassembly and tilting.

[0035] With strong structural versatility and cross-category application expansion, the core automatic opening and closing baffle structure is not limited to push-type and wheel sweepers. It can be directly transplanted to various detachable waste collection containers such as automatic dust collection station dust boxes, handheld vacuum cleaner dust cups, and small industrial vacuum waste boxes. The patent has a wide range of application scenarios and high product expansion value.

[0036] Simple assembly facilitates mass production. Each component is modularly designed, with guides, spring reset, and baffles as independent assembly units. Parts are easy to disassemble and replace, reducing assembly time on the production line. The spring receiving cavity, slide, and other structures can be injection molded as a single piece, reducing the number of independent parts. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is an assembly diagram of the sweeper body and the dustbin;

[0039] Figure 2 This is a schematic diagram of the structure when the baffle is raised to block the upper part of the garbage inlet in this invention;

[0040] Figure 3 This is a schematic diagram of the structure when the baffle moves down to block the lower part of the garbage inlet in this invention;

[0041] Figure 4 This is a cross-sectional view of the guide limiting component and the reset driving component in this invention;

[0042] Figures 5 to 8 This is an assembly diagram of the guide limiting component, reset driving component, and baffle in this invention;

[0043] Figure 9 and Figure 10 This is a schematic diagram of the structure of the trash can in Example 3;

[0044] Figure 11 A schematic diagram of a lead screw and ball bearing structure;

[0045] Figure 12 This is a schematic diagram of the push-up part on the main body of the sweeper;

[0046] Figure 13 A cross-sectional view showing the main and secondary receiving cavities within the trash can, each matched with front and rear cleaning components. Detailed Implementation

[0047] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "water," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0053] The following describes in detail, with reference to the accompanying drawings, an embodiment of the sweeper used for garbage collection according to this application.

[0054] Reference Figures 1 to 13 This application discloses a structure for an automatic closing sweeper with a trash can that is compatible with push-type / automatic garden sweepers and wheeled cleaning robots. The core innovation lies in the vertically sliding movable baffle at the trash can inlet. The sweeper body pushes the baffle to automatically open the bin when it enters and automatically closes it when it exits to seal. The structure is optimized in multiple dimensions, including a dual-path guide limit structure, an isolated spring reset drive component, an adjustable preload spring, multi-level damping noise reduction and buffer, and multi-layer composite baffles. It also provides a simplified derivative solution with pure gravity and no springs, and a derivative solution with a sliding groove to replace the guide column. It addresses pain points in mass production assembly, long-term durability, noise reduction and anti-jamming, and prevention of trash spillage and dust. The structure is backward compatible with similar detachable trash collection containers such as dust collection station dust boxes and handheld vacuum cleaner dust cups.

[0055] Example 1

[0056] The basic assembly structure of the sweeper provided in this embodiment includes two core components: the sweeper body 1 and the dustbin 2, which is detachably assembled inside the sweeper body 1.

[0057] The garbage bin 2 is an injection-molded box structure. A long strip garbage inlet 21 is opened at the front of the box. The side wall of the box above the garbage inlet 21 is a closed solid surface without any opening. The garbage inlet 21 covers the discharge channel of the sweeper's roller brush or other cleaning mechanism. During the sweeping operation, the debris, dust, branches and leaves thrown out by the roller brush or other cleaning mechanism can enter the inside of the box for storage through the garbage inlet 21.

[0058] The sweeper body 1 has a vertically arranged dustbin assembly slot inside. A handle is installed on the top of the dustbin 2; by pulling the handle, the entire dustbin 2 can be pulled up and down vertically to complete the assembly and disassembly. Figure 8As shown, the sweeper body 1 has slots on both sides of the corresponding garbage bin inlet 21 to form a pushing part 11. The upper part of both sides of the baffle 22 has outwardly protruding limiting protrusions 224. The pushing part 11 only contacts the baffle 22 when the garbage bin 2 is lowered into the assembly slot to limit the limiting protrusions 224, thereby lifting the baffle 22. There are many alternative solutions for the structure of the pushing part 11. For example, the pushing part 11 can be designed as a rigid protrusion, boss or inclined structure. When the garbage bin 2 is lowered into the assembly slot, it contacts a specific part on the baffle 22 and lifts the baffle 22.

[0059] A movable baffle 22 is vertically installed at the waste inlet 21. The baffle 22 can slide back and forth in the vertical direction, providing two stable working positions:

[0060] Position a (outlet sealing position): The garbage bin 2 is pulled upward and detached from the sweeper body 1. The baffle 22 slides down to the lower area of ​​the garbage inlet 21, sealing the lower half opening of the garbage inlet 21. The bin and the baffle 22 form a closed storage chamber at the bottom, so that there is no spillage or dust during the garbage dumping process.

[0061] Position b (inlet opening): The garbage bin 2 is fully inserted downwards into the sweeper assembly slot, the push part 11 pushes upwards against the push baffle 22, the baffle 22 is raised to the middle / upper part of the garbage inlet 21, the lower half of the garbage inlet 21 is fully open, and the swept garbage can be normally sent into the bin.

[0062] In one embodiment, the waste inlet 21 is located at the rear end of the container, or the waste inlet 21 is located at both the front and rear ends of the container.

[0063] In one embodiment, the entire side of the front and / or rear of the trash can 2 is an open trash inlet 21. With the help of a sliding baffle 22 that partially blocks the trash inlet 21, the trash can 2 can be emptied / washed extremely cleanly without leaving any dead corners when dumping trash or washing.

[0064] Guide and limit component design: A guide and limit component 24 is vertically installed on the garbage bin 2 at the garbage inlet 21. The baffle 22 is slidably installed on the guide and limit component 24 to achieve vertical sliding and limiting.

[0065] In one embodiment, two sets of independent guide and limiting components 24 are symmetrically arranged on the left and right sides of the garbage inlet 21 of the garbage bin 2 to ensure that the baffle 22 slides vertically without deviation or jamming.

[0066] The guide and limit component 24 is a vertical guide post. The upper ends of the two guide posts are integrally injection molded / threaded and locked onto the garbage bin 2 body, and the lower ends of the guide posts are integrally injection molded onto the garbage bin 2 body, or fixed to the bottom of the bin body by threading and other means, forming a vertical sliding track constrained at both ends.

[0067] The baffle 22 has sliding sleeves on both the left and right sides, and is respectively fitted onto two guide posts through the sliding sleeves. The gap between the guide posts and the sliding sleeves is controlled between 0.1mm and 0.3mm. If the gap is too small, dust will easily accumulate and jam; if the gap is too large, the baffle will shake and leak dust.

[0068] The guide column surface is treated with a polished / wear-resistant coating to reduce sliding friction with the sleeve, making it suitable for wet and muddy garden cleaning conditions.

[0069] In one embodiment, the guide limiting component 24 is a hook or covering guide structure that cooperates with the chute, eliminating the need for independent guide column parts. Vertical chutes are directly set on the left and right side walls of the garbage inlet 21. The vertical chutes can be injection molded integrally with the garbage bin 2. The baffle 22 has hooks or covering structures on the left and right sides, and the hooks or covering structures are locked at the vertical chute and slide vertically along the vertical chute. The baffle 22 can slide vertically up and down by relying on the constraint of the chute. There are fewer parts and the mold opening cost is lower, which is suitable for small household cleaning robots.

[0070] In one embodiment, to reduce closing noise and improve sealing effect, the upper and / or lower ends of the baffle 22 have elastic buffer portions. The upper and lower edges of the baffle 22 can be integrally covered with TPE elastic buffer portions. When the baffle 22 is raised to the top, the upper buffer portion flexibly collides with the upper sealing surface of the waste inlet 21 to reduce noise. When the baffle 22 slides down to seal the bottom, the lower buffer portion presses against the lower edge of the waste inlet 21. On the one hand, it eliminates the impact noise of metal / hard plastic. On the other hand, the deformation of the buffer portion fills the gaps in the contact surface. Even if the contact surface is mixed with fine sand particles and fibrous waste, it can still maintain a seal and prevent ash leakage from the gaps.

[0071] In one embodiment, the baffle 22 is a single-layer structure.

[0072] In one embodiment, the baffle 22 has a double-layer structure. The position of the first layer baffle 22 is to fix and block the middle and / or upper part of the garbage inlet 21. The first layer baffle 22 has two position states: the baffle 22 slides to the lower part and blocks the lower part of the garbage inlet 21; the baffle 22 slides to the middle and / or upper part and blocks the middle and / or upper part of the garbage inlet 21.

[0073] In one embodiment, a pure gravity reset drive is adopted, eliminating the need for a reset drive component design. The sliding seal is achieved solely by the weight of the baffle itself. The baffle 22 can be integrally embedded or detachably equipped with a counterweight to increase its own weight and increase the sliding drive force, thus compensating for the insufficient power of relying solely on the gravity drive of the baffle 22. This results in fewer structural parts and a simpler assembly process, making it suitable for lightweight, small handheld cleaning devices.

[0074] Working logic: When the garbage bin 2 is inserted into the garbage bin assembly slot, the pusher 11 lifts the baffle 22 upwards, opening the lower part of the garbage inlet 21. When the sweeper is working, it starts through the roller brush or other cleaning mechanism and sweeps the garbage into the garbage bin 2 through the garbage inlet 21. At this time, the baffle 22 blocks the middle or upper part of the garbage inlet 21. Especially when the baffle 22 blocks the upper part of the garbage inlet 21, it avoids or reduces the dust in the garbage bin 2 from drifting out through the garbage inlet 21. When the garbage bin needs to be cleaned, the sweeper is turned off, the garbage bin 2 is pulled upwards to get out of the pusher constraint, and the baffle 22 slides down by its own weight, automatically sealing the lower part of the garbage inlet 21. No manual closing is required throughout the process.

[0075] Example 2

[0076] The difference between this embodiment and embodiment 1 is that a reset drive assembly 23 is also provided between the garbage bin 2 and the baffle 22. The reset drive assembly 23 is used to drive the baffle 22 to slide down and block the lower part of the garbage inlet 21 when the baffle 22 is released from the pushing constraint of the pushing part 11. The baffle 22 slides down and blocks the lower part of the garbage inlet 21 by the combination of the weight of the baffle 22 and the elastic force of the elastic element.

[0077] The reset drive assembly 23 includes a spring 231 and a vertically arranged, relatively sealed spring receiving cavity 232.

[0078] The side wall of the garbage bin 2 protrudes outward to form a spring receiving cavity 232. The cavity is physically isolated from the garbage inlet 21. Only a slender vertical guide groove is opened on the side of the cavity facing the baffle 22. Dust, lint, and silt cannot enter the cavity in large quantities, thus preventing the spring from jamming and failing at the source. The side wall of the spring receiving cavity 232 has a through guide groove along the vertical direction. The baffle 22 has a limit protrusion 221 integrally formed at the middle position on both sides. The limit protrusion 221 passes through the vertical guide groove of the spring receiving cavity 232 and extends into the cavity.

[0079] In one embodiment, the spring 231 is placed vertically in the spring receiving cavity 232, and the spring 231 is stretched between the lower end of the spring receiving cavity 232 and the limiting protrusion 221. The lower end of the limiting protrusion 221 has an anti-disengagement ring or flange structure arranged circumferentially. The upper end of the spring 231 is sleeved on the anti-disengagement ring or flange structure to eliminate the circumferential preload on the spring 231 and limit the spring to prevent it from shifting to the left or right.

[0080] The limiting protrusion 221 is located in the middle of the baffle rather than at the top. When the baffle 22 slides up to the limit sealing position, the limiting protrusion 221 remains in the middle of the cavity, reserving a buffer cavity at the top of the cavity. Impurities entering the cavity will not interfere with the movement of the spring when they are at the top.

[0081] An adjustable preload threaded preload structure is added to the lower end of spring 231 to compensate for spring force attenuation. Specifically, a through threaded hole is provided at the lower end of the spring receiving cavity 232, and a preload part is screwed into the threaded hole. The upper end of the preload part is located inside the spring receiving cavity 232, and the lower end of spring 231 is locked onto the preload part. Rotating the preload part can adjust the depth of insertion into the cavity, change the initial tension of the spring, compensate for the spring force attenuation after long-term fatigue use, and extend the service life of the whole machine. To prevent the elastic element from accidentally coming out, the upper end of the preload part has a circumferential anti-disengagement ring or flange structure. The lower end of spring 231 is sleeved on the anti-disengagement ring or flange structure, which limits the axial movement of spring 231 while allowing spring 231 to rotate circumferentially and eliminate circumferential preload, thus preventing excessive circumferential preload on spring 231 when the preload part applies axial preload to the spring.

[0082] In another embodiment, the spring 231 is vertically compressed between the upper end of the spring receiving cavity 232 and the limiting protrusion 221. The upper end of the spring 231 abuts against the upper end of the spring receiving cavity 232, and the lower end abuts against the limiting protrusion 221 of the baffle 22. The spring receiving cavity 232 can isolate dust and lint as independently as possible, avoiding jamming of the spring 231 and the baffle 22. When the reset drive assembly 23 is installed, it can overcome the failure of the baffle 22 due to mechanical jamming when it relies on gravity to close, fundamentally eliminating the risk of off-center jamming caused by the misalignment of the gravity direction with the axis of the guide column and / or guide groove. It fundamentally avoids closing failure caused by mechanical factors such as dust accumulation in the guide groove and uneven fit clearance. It eliminates the defects of no manual intervention by the user and can automatically and stably complete the sliding closing action of the baffle 22. The elastic energy storage and release process is not affected by external foreign objects, and the closing action is fast and consistent, simplifying the garbage dumping operation process and improving the convenience of user experience and long-term reliability.

[0083] The limiting protrusion 221 is located in the middle of the baffle rather than at the bottom. When the baffle 22 slides down to the limit sealing position, the limiting protrusion 221 still stays in the middle of the cavity. A buffer cavity is reserved at the bottom of the cavity, so that a small amount of impurities entering the cavity will accumulate at the bottom without interfering with the spring compression movement.

[0084] The upper end of the limiting protrusion 221 has an anti-disengagement ring or flange structure arranged circumferentially, and the lower end of the spring 231 is sleeved on the anti-disengagement ring or flange structure to eliminate the circumferential preload on the spring 231 and limit the spring to prevent it from shifting to the left or right.

[0085] To address the issue of elastic decay after long-term compression of spring 231 and optimize its lifespan, an adjustable preload threaded preload structure can be added to the upper end of spring 231 to compensate for elastic force attenuation. Similar to the embodiment described above where spring 231 is stretched between the lower end of spring receiving cavity 232 and the limiting protrusion 221, the main difference is that the spring 231 is changed from being stretched at the lower part of spring receiving cavity 232 to being compressed at the upper part of spring receiving cavity 232. Furthermore, the threaded hole and preload portion are moved from the lower part of spring receiving cavity 232 to the upper part. Specifically, a through upper threaded hole is provided at the upper end of spring receiving cavity 232, and an upper threaded portion is screwed into the upper threaded hole. The pre-tensioning part has its lower end located inside the spring receiving cavity 232, and the upper end of the spring 231 is locked onto the upper pre-tensioning part. Rotating the upper pre-tensioning part can adjust the depth of insertion into the cavity, change the initial compression of the spring, compensate for the elasticity decay after long-term fatigue use, and extend the service life of the whole machine. To prevent the elastic element from accidentally coming out, the lower end of the upper pre-tensioning part has a circumferentially arranged anti-disengagement ring or flange structure. The upper end of the spring 231 is sleeved on the anti-disengagement ring or flange structure, which limits the axial movement of the spring 231 while allowing the spring 231 to rotate circumferentially and eliminate the circumferential pre-tension force, thus preventing the circumferential pre-tension force on the spring 231 from being too large when the upper pre-tensioning part applies axial pre-tension force to the spring.

[0086] Regarding the design of the threaded preload structure, a through threaded hole can be provided on the limiting protrusion 221 along the spring axis, and a preload part can be screwed into the threaded hole. One end of the spring 231 is limited to the preload part. By rotating the preload part, the initial compression / initial tension of the spring can be adjusted to compensate for the elasticity decay of the spring after long-term fatigue use and extend the service life of the whole machine. Correspondingly, if the preload part is screwed into the threaded hole of the limiting protrusion 221, the guide groove on the side wall of the spring receiving cavity 232 or another hole can be opened at the end of the spring receiving cavity 232 so that the operator's hand or tool can enter the spring receiving cavity 232 to adjust the screwing position of the preload part.

[0087] Anti-detachment limit: The top of the upper pre-tightening part is exposed on the outside of the box so that the upper pre-tightening part can be rotated. The threaded hole can be sealed with a sealing rubber plug; the upper and lower anti-detachment retaining rings or flanged structure double constraint springs 231 will not fall off the cavity during cleaning, bumping, or violent tilting.

[0088] In one embodiment, a guide groove is formed on the side of the cavity facing away from the waste bin to further prevent the intrusion of waste and impurities.

[0089] In one embodiment, the reset drive assembly 23 has two sets and is respectively disposed on both sides of the waste inlet 21 to ensure the smooth sliding and reset of the baffle 22.

[0090] In one embodiment, to prevent excessive impact from the spring 231 during the closing process, a damping structure, such as a friction sleeve or a viscous fluid damper, is added to the spring 231 in series or in parallel.

[0091] In one embodiment, the spring 231 is a 304 stainless steel compression / tension spring 231 with the following parameters: wire diameter 0.7mm, outer diameter 15mm, free length without compression / tension 210mm, spring stiffness 0.04~0.09 N / mm, assembly pre-compression or tension 3~12mm, and initial preload 0.12~1.05N. The upper end of the spring abuts against the preload part at the top of the cavity, and the lower end is sleeved on the outer ring flange of the limiting protrusion 221. The circumferential flange limits the spring to prevent it from shifting to the left or right and eliminates the circumferential torsional preload of the spring.

[0092] In one embodiment, since there is a reset drive assembly 23, excessive impact may occur during the reset process. In order to prevent excessive impact from the spring 231 during the closing process and to reduce noise, a damping structure 29, such as a friction sleeve, is added to the spring 231 or the guide limit assembly 24.

[0093] For example, a friction sleeve (such as a rubber sleeve) can be added between the baffle 22 and the guide limiting component 24. When the guide limiting component 24 is a guide post, a friction sleeve can be added to the inner wall of the sliding sleeve on the left and right sides of the baffle 22 or the outer wall of the guide post to increase the friction between the sliding sleeve and the guide post. However, it is necessary to ensure that when the baffle 22 is disengaged from the push, the pushing / pulling force of the spring 231 on the baffle 22 is greater than the frictional resistance experienced by the baffle 22, so that the baffle 22 can slide down vertically along the guide post smoothly and seal the lower part of the garbage inlet 21.

[0094] Or, such as Figure 11 As shown, when the guide limiting component 24 is a guide post, a screw and ball structure can be added to the guide post as a damping structure 29. The screw and ball structure includes a screw 291, a nut 292, balls 293, and a return device 294. The guide post is processed into a screw structure to form a screw 291 in whole or in part. The nut 292 has a threaded groove inside that matches the screw 291 and the balls 293. The balls 293 are rolled between the screw 291 and the nut 292, and a return device 294 is matched and set. The nut 292 is fixed on the baffle 22, so that the vertical linear motion is converted into rolling during the up and down sliding of the baffle 22, the resistance during the downward movement of the baffle 22 is appropriately increased, and its falling speed is reduced, thereby reducing collision noise and impact.

[0095] Working logic: When garbage bin 2 is inserted into the garbage bin assembly slot, the pusher 11 lifts the baffle 22 upwards, and the limiting protrusion 221 simultaneously compresses / stretches the spring 231 upwards, storing elastic potential energy; when garbage bin 2 is pulled upwards to break free from the pusher constraint, the spring 231 quickly releases the stored energy, pushing / pulling the limiting protrusion 221 downwards to drive the baffle 22 to slide vertically down along the guide column, automatically sealing the lower part of the garbage inlet 21, without the need for manual closing throughout the process.

[0096] Example 1, which relies solely on gravity for closure, is prone to issues such as uneven guide load, dust accumulation causing jamming, and closure failure. In contrast to Example 1, the combined spring and gravity drive in this example completely avoids these defects. The spring driving force is not affected by the baffle placement angle or dust and foreign objects, and the closure action is uniform, stable, and reliable.

[0097] Example 3

[0098] The difference between this embodiment and Embodiments 1 and / or 2 is that: Garbage inlets 21 are provided on both the front and rear sides of the garbage bin 2. The baffle 22 is located at the rear garbage inlet 21. The front garbage inlet 21 has a shielding part 212 that covers the lower part of the garbage inlet 21. The shielding part 212 can be designed as an integral part of the garbage bin 2. The lower part of the sweeper body 1 has a front guide plate 12 that matches the shielding part 212. The front guide plate 12 is inclined with a lower front and a higher rear. When the garbage bin 2 is inserted into the sweeper body 1, the rear end of the front guide plate 12 extends to the upper end of the shielding part 212 so that garbage can enter the garbage bin 2 through the front guide plate 12. The front cleaning component 13 of the sweeper body 1 is located in front of and / or above the front guide plate 12 to cooperate with the front guide plate 12 and the garbage bin 2 to complete the cleaning work. A cleaning roller brush 14 is also correspondingly provided on the outer side of the rear garbage inlet 21. Figure 13 As shown.

[0099] The trash can 2 is also equipped with an L-shaped partition 25 for separating the front and rear chambers. The partition 25 divides the trash can 2's internal trash-receiving chamber into a main receiving chamber 26 at the front and upper part, and a secondary receiving chamber 27 at the rear and lower part for collecting dust that has leaked out at the tail. The baffle 22 slides up and down to open and close the entrance to the secondary receiving chamber 27.

[0100] In one embodiment, the baffle 22 is designed as a double-layer structure. The inner layer is a fixed baffle 222, which is fixed to the upper part of the rear garbage inlet 21 and blocks the upper part of the garbage inlet 21. The lower part of the fixed baffle 222 is connected to the partition 25 to close the rear side of the main receiving cavity 26. The outer layer is a sliding baffle 223, which has at least two position states: the sliding baffle 223 slides to the lower part and blocks the lower part of the rear garbage inlet 21, i.e. the entrance of the secondary receiving cavity 27; the sliding baffle 223 slides to the middle and / or upper part and opens the entrance of the secondary receiving cavity 27.

[0101] In one embodiment, a guide plate 211 inclined downward from the inside to the outside is installed at the lower part of the rear garbage inlet 21. The cleaning roller brush 14 is located behind the guide plate 211 so as to sweep the dust and other garbage missed from the front into the garbage bin 2 (sub-accommodation cavity 27). The lower end of the baffle 22 is a sloping section structure inclined downward from the inside to the outside. The inclination of this sloping section structure is greater than or equal to the inclination of the upper end surface of the guide plate 211. On the one hand, it matches the sloping structure of the guide plate 211. On the other hand, it can make the garbage corresponding to the lower end of the baffle 22 enter the garbage bin 2 as much as possible when the baffle 22 falls. Furthermore, even if a certain amount of dust and other garbage accumulates at the lower end of the baffle 22 when the garbage bin is removed, under the combined action of the weight of the baffle 22 and the driving force of the reset drive component 23, the baffle 22 cuts into the dust and blocks it when it moves down, so as to prevent the garbage bin 2 from spilling because the baffle 22 is not closed tightly when it is moved.

[0102] In one embodiment, the structure of the garbage bin 2 corresponding to the lower part of the rear garbage inlet 21 is an assembled structure with an assembled base 28. The spring receiving cavity 232 and the guide limiting component 24 are separate assembled structures to facilitate assembly. Otherwise, if an integrated structure is used, it would be inconvenient to install and use. The lower parts of the spring receiving cavity 232 and the guide limiting component 24 are both located on the base 28. They can be designed as an integrated structure or as an assembled structure. The figure shows an integrated structure. The base 28 and the main structure of the garbage bin 2 are connected and fixed by bolts or other connection methods to facilitate assembly and maintenance.

[0103] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A sweeper with an automatic trash can closing structure, comprising a sweeper body (1) and a trash can (2) detachably mounted on the sweeper body (1), wherein at least one side of the trash can (2) has a trash inlet (21), characterized in that: At least one waste inlet (21) is vertically slidably fitted with a baffle (22) to block the waste inlet (21), and the baffle (22) has at least two position states: the baffle (22) slides to the lower part and blocks the lower part of the waste inlet (21); the baffle (22) slides to the middle and / or upper part and blocks the middle and / or upper part of the waste inlet (21).

2. The sweeper with an automatic trash can closing structure according to claim 1, characterized in that: The sweeper body (1) has a pusher (11) corresponding to the baffle (22), and the baffle (22) has at least two position states: When the garbage bin (2) is inserted into the sweeper body (1), the push part (11) of the sweeper body (1) pushes the baffle (22), causing the baffle (22) to slide to the middle and / or the top and block the middle and / or the top of the garbage inlet (21); When the garbage bin (2) is detached from the sweeper body (1), the baffle (22) is detached from the push of the push part (11), and the baffle (22) slides to the lower part and blocks the lower part of the garbage inlet (21).

3. A sweeper with an automatic trash can closing structure according to claim 1, characterized in that: The trash can (2) is provided with a guide limiting component (24) vertically at the trash inlet (21), and the baffle (22) is slidably disposed on the guide limiting component (24).

4. A sweeper with an automatic trash can closing structure according to claim 3, characterized in that: A reset drive assembly (23) is provided between the garbage bin (2) and the baffle (22) for driving the baffle (22) to slide down and block the lower part of the garbage inlet (21) when the baffle (22) is released from the pushing constraint of the pushing part (11).

5. A sweeper with an automatic trash can closing structure according to claim 4, characterized in that: The reset drive assembly (23) includes a spring (231) and a spring receiving cavity (232) arranged vertically. The side wall of the spring receiving cavity (232) is provided with a guide groove along the vertical direction. The baffle (22) has a limiting protrusion (221), and the limiting protrusion (221) extends into the spring receiving cavity (232) through the guide groove. The spring (231) is placed in the spring receiving cavity (232), and the spring (231) is compressed vertically between the upper end of the spring receiving cavity (232) and the limiting protrusion (221). And / or, the spring (231) is stretched between the lower end of the spring receiving cavity (232) and the limiting protrusion (221).

6. A sweeper with an automatic trash can closing structure according to claim 5, characterized in that: The reset drive assembly (23) has two sets and is respectively disposed on both sides of the garbage inlet (21). The guide groove on the spring receiving cavity (232) is opened on the side facing away from the garbage inlet (21), and the limiting protrusion (221) is disposed in the middle of both sides of the baffle (22).

7. A sweeper with an automatic trash can closing structure according to claim 5, characterized in that: One end of the spring (231) has an adjustable preload threaded preload structure, specifically including: a through threaded hole is provided at the end of the spring receiving cavity (232) along the spring axis, a preload part is screwed in the threaded hole, and one end of the spring (231) is limited on the preload part; The spring (231) and / or the limiting protrusion (221) has a through threaded hole along the spring axis, and a preload is screwed into the threaded hole. One end of the spring (231) is limited on the preload, and the initial compression / initial tension of the spring is adjusted by rotating the preload.

8. A sweeper with an automatic trash can closing structure according to claim 1, characterized in that, The baffle (22) is a single-layer, double-layer, or double-layer structure. When the baffle (22) is a double-layer or double-layer structure: At least one baffle (22) is positioned to securely block the middle and / or upper part of the garbage inlet (21); At least one baffle (22) has at least two position states: the baffle (22) slides to the lower part and blocks the lower part of the garbage inlet 21; the baffle 22 slides to the middle and / or the upper part.

9. A sweeper with an automatic trash can closing structure according to claim 2, characterized in that, The sweeper body (1) has a garbage bin assembly slot, and the garbage bin (2) is slidably assembled in the upper garbage bin assembly slot along the vertical direction: When the garbage bin (2) is vertically inserted into the sweeper body (1), the push part (11) of the sweeper body (1) pushes the baffle (22), causing the baffle (22) to slide to the middle and / or the top and block the middle and / or the top of the garbage inlet (21); When the garbage bin (2) is lifted vertically upward and detached from the sweeper body (1), the baffle (22) is disengaged from the push of the push part (11), and the baffle (22) slides to the lower part and blocks the lower part of the garbage inlet (21).

10. A sweeper with an automatic trash can closing structure according to claim 2, characterized in that: The trash can (2) has an open trash inlet (21) on at least one side.

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