A small household brush dishwasher

Abstract

This utility model discloses a small household dishwasher, belonging to the field of home appliance technology. The dishwasher includes a flip-up bracket, a sliding tube assembly, and a washing power unit. The flip-up bracket can be installed in a pre-drilled hole in the kitchen sink or placed independently using a suction cup. The sliding tube assembly is used to adjust the height of the dishwasher for easy storage and use. The washing power unit includes a support leg with a strain gauge, a motor, and a flexible washing sponge structure. When the user presses the bowl onto the brush head, the support leg is compressed, and the strain gauge outputs a signal to control the circuit to start the motor, driving the washing sponge to rotate and clean the bowl. The motor speed is dynamically adjusted according to the downward pressure. The brush head has a flexible, bendable fixing structure to conform to different bowl shapes, improving cleaning effectiveness. This device has a compact structure, flexible installation, and automatic start / stop and speed control capabilities, making it suitable for daily dishwashing in the home kitchen and solving the problems of cumbersome manual dishwashing and the risk of hand injuries.

Description

Technical Field

[0001] This utility model relates to the field of kitchen cleaning equipment technology, specifically a small household dishwashing machine. Background Technology

[0002] With the fast pace of modern life, dishwashing in the family kitchen still relies mainly on manual labor, especially for small daily dishwashing scenarios. Using a large dishwasher is often costly, complicated to prepare, and time-consuming, so hand washing remains the mainstream method. Users typically need to clean dishes with a cloth or sponge, and repeatedly scrub with detergent and water. This process is frequent, takes up space, and it is difficult to avoid prolonged contact between hands and detergent or greasy water during multiple washes.

[0003] Against this backdrop, miniaturized, simple-structured dishwashing devices suitable for home use have become a research focus. While some small dishwashing aids exist on the market, most are hand-held or foot-operated, requiring continuous user control of the washing process and lacking automatic response capabilities. Furthermore, if the dishes have broken edges or minor cracks, they can easily cut the skin, especially in slippery environments, causing discomfort and potential safety hazards.

[0004] In addition, some existing products are bulky, require extensive installation, and are inconvenient to store, making them difficult to adapt to the needs of ordinary kitchen spaces, which further limits their scope of use and promotional value.

[0005] In view of the above problems, a small household dishwasher is proposed. With compact structure, convenient operation and automatic response as the core, it automatically senses the pressure of the dishes to trigger the washing process, replacing the traditional hand washing method, reducing the frequency of hand contact, improving the safety and convenience of use, and solving the problems of cumbersome dish washing operation and the risk of hand scratches. Utility Model Content

[0006] The purpose of this invention is to provide a small household dishwasher to solve the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a small household dishwashing machine, including a flip bracket, the flip bracket being fixedly mounted on the edge of the dishwashing sink, a power device being slidably mounted on the moving end of the flip bracket, and a dishwashing sponge being mounted on the output end of the power device. The power unit includes a base, the outer wall of which is provided with a bendable support leg, and the inside of the support leg is provided with a strain gauge. The pressure value range generated by the bending of the strain gauge is used to control the start and stop of the motor installed inside the base. The output end of the power unit is provided with a connection structure, and the dishwashing sponge can be replaced through the connection structure. The dishwashing sponge includes a retaining ring, and a flexible sheet structure is welded to the outside of the retaining ring. A sponge sleeve is fitted over the sheet structure.

[0008] Preferably, the flipping bracket includes a fixed base, a fixed arm is fixed to the top of the fixed base, a hinge arm is hinged to the end of the fixed arm, and the power device is hinged to the end of the hinge arm.

[0009] Preferably, a slide tube is slidably fitted on the outer side of the hinge arm, and a connector is hinged to the outer side of the slide tube, with the connector hinged to the base.

[0010] Preferably, the outer wall of the slide tube is provided with a threaded hole, and a fastener is screwed into the inside of the threaded hole.

[0011] Preferably, a waterproof cover is screwed to the top of the base, a waterproof ring is provided at the top of the inside of the waterproof cover, and a waterproof ring is provided at the connection between the waterproof cover and the base.

[0012] Preferably, a plate-shaped groove is formed on the right side of any one of the legs at the midline of the leg thickness, and the strain gauge is disposed inside the plate-shaped groove.

[0013] Preferably, the output end of the motor is equipped with a coupling, the top end of the coupling is screwed with a fixing nut, the topmost end of the coupling is screwed with a decorative cap, and the fixing nut and the decorative cap are attached to the outer wall of the fixing ring.

[0014] Preferably, the bottom of the support leg, which is closest to and hinged to the hinge arm, is provided with a wire groove. The inside of the wire groove accommodates a wire, and a plug and a transformer are provided on the outside of the wire. The output end of the wire is electrically connected to the motor.

[0015] Preferably, the outer side of the decorative cap is provided with anti-slip texture, and the decorative cap and the coupling are connected by a thread in the opposite direction to the motor output direction.

[0016] Preferably, the length of the sponge sleeve is between 50mm and 160mm.

[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention provides a small household dishwasher that, through a pressure-triggered structure and automatic control circuit, automatically senses and starts the washing process when the user places the dishes on the brush head, eliminating the need for hand washing and reducing the frequency of direct contact. The brush head structure adopts a flexible sponge body and a curved structure that conforms to the bowl wall, ensuring cleaning effectiveness while reducing the risk of scratches. The overall structure supports quick installation and storage, adapting to daily kitchen use and improving the safety and convenience of the dishwashing process. This device effectively replaces the traditional manual dishwashing method, solving problems such as cumbersome operation and the risk of hand injuries. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the usage state of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the static structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of this utility model under pressure.

[0022] Figure 5 This is an assembly diagram of the present invention.

[0023] Figure 6 This is an assembly diagram of the present invention.

[0024] Figure 7 This is a top view of the present invention.

[0025] Figure 8 for Figure 7 Sectional view at point AA.

[0026] In the diagram: 1. Flip-over bracket, 11. Fixed base, 12. Hinge arm, 13. Slide tube, 14. Connector, 2. Power unit, 21. Base, 22. Support leg, 23. Plate groove, 24. Waterproof cover, 25. Motor, 26. Coupling, 27. Waterproof ring, 28. Fixing nut, 29. Decorative cap, 210. Wire channel, 3. Dishwashing sponge, 31. Fixing ring, 32. Sponge sleeve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-8 This utility model provides a technical solution: a small household dishwashing machine, including a flip bracket 1, which is fixedly mounted on the edge of the dishwashing sink. A power device 2 is slidably mounted on the moving end of the flip bracket 1, and a dishwashing cotton 3 is mounted on the output end of the power device 2. The power unit 2 includes a base 21, the outer wall of which is provided with a bendable support leg 22, and a strain gauge is provided inside the support leg 22. The pressure value range generated by the bending of the strain gauge is used to control the start and stop of the motor 25 provided inside the base 21. The output end of the power unit 2 is equipped with a connection structure, through which the dishwashing sponge 3 can be replaced; The dishwashing sponge 3 includes a retaining ring 31, with a flexible sheet structure welded to the outside of the retaining ring 31, and a sponge sleeve 32 sleeved on the outside of the sheet structure.

[0029] In the above structure, the flip-up bracket 1 provides stable fixation and adjustable support for the entire device at the edge of the sink, and is especially suitable for single or double sink kitchen sinks of different sizes. One end of the bracket is fixed to the edge of the sink, while the other end can be flipped to carry the power unit 2, making it easy to fold and store when not in use, saving space and improving the tidiness of the kitchen and the practicality of the equipment.

[0030] The power unit 2 is mounted on the moving end of the flipping bracket 1 via a sliding assembly, ensuring that the device has a certain ability to move back and forth during use to adapt to bowls and plates of different depths, heights, or diameters. The motor 25 is located inside the base 21. After the motor is started, the drive output end rotates, causing the dishwashing sponge 3 to rotate, and the dishwashing sponge 3 performs a continuous rotating scrubbing operation on the surface of the utensil.

[0031] The dishwashing sponge 3 is fixed to the motor output shaft via a replaceable connection structure, allowing users to easily disassemble and replace it after long-term use or when it becomes soiled and worn. The main body of the dishwashing sponge consists of a fixing ring 31 combined with a flexible sheet structure. The sheet structure is made of tough polypropylene or polyurethane material, which can bend and conform to the bowl wall when pressed, forming a covering cleaning structure with the outer sponge sleeve 32.

[0032] The sponge sleeve 32 is a working component that directly contacts the surface of the bowls and plates. Its material is preferably hydrophilic sponge or fine-pore polyester cotton, which has a strong water absorption capacity in water and good softness and elasticity. It can effectively remove oil stains and food residues from the surface of the bowls and plates, avoid scratching the surface of the utensils, and ensure that the cleaning area is evenly covered.

[0033] When in use, place the bowl or plate upside down on the sponge sleeve 32 and press down. The support leg 22 will deform under pressure. The strain gauge will analyze the strain generated by the strain gauge through the internal control system. If the pressure exceeds the set threshold, the motor 25 will start to drive the dishwashing sponge 3 to rotate, thus cleaning the bottom and inner wall of the bowl. When the pressing pressure decreases to below the set range, the motor will automatically stop to avoid idling and wasting energy.

[0034] Specifically, the flipping bracket 1 includes a fixed base 11, a fixed arm is fixed to the top of the fixed base 11, and a hinge arm 12 is hinged to the end of the fixed arm. The power unit 2 is hinged to the end of the hinge arm 12.

[0035] To improve the ease of installation and structural versatility of the device, the mounting base 11 can be designed to be inserted into the pre-drilled cleaning fluid bottle mounting hole on the kitchen sink. Its outer diameter is compatible with common hole positions (such as φ35mm to φ50mm). Users can insert it and secure it by tightening it with bottom expansion blocks, washers or nuts. The installation process does not require damage to the original kitchen countertop, making it especially suitable for renovated homes and rental scenarios.

[0036] Furthermore, the flip-up bracket 1 not only facilitates the folding and storage of the power unit 2, but also provides structural support and stability. During operation, the power unit 2 is prone to slight vibrations or shifts due to motor rotation and scrubbing resistance. The flip-up bracket 1 provides effective structural support, ensuring the power unit remains stable during dishwashing and preventing displacement that could reduce cleaning efficiency or cause poor contact with the dishes. The flip-up bracket, through its overall support system, suppresses shaking during operation, improving safety and reliability during use.

[0037] In certain usage scenarios, users can also place the power unit 2 separately on the kitchen countertop or under the sink. Therefore, the base 21 can also be designed with a suction cup structure at the bottom to provide an additional optional auxiliary fixing method.

[0038] The hinged arm 12 is connected to the end of the fixed arm and forms a hinged connection with the power unit 2, so that the entire device can be adjusted back and forth according to the height of the bowl and the angle of use, further improving the adjustability of the scrubbing angle and the convenience of use.

[0039] Specifically, a slide tube 13 is slidably mounted on the outer side of the hinge arm 12, and a connector 14 is hinged to the outer side of the slide tube 13. The connector 14 is hinged to the base 21.

[0040] To enable flexible adjustment of the height and angle of the dishwashing device, a sliding tube 13 is slidably fitted on the outer side of the hinge arm 12. The sliding tube 13 is a hollow cylindrical or square tube structure, which forms a sliding engagement with the hinge arm 12 through an inner guide rail or an embedded groove, allowing the user to adjust the vertical installation position of the power unit 2 according to the size of the dishes or the height difference of the washing area.

[0041] The slide tube 13 is hinged to the connector 14 via its outer side, and the connector 14 is then rotated with the base 21. This structure allows the power unit 2 to have a certain degree of rotational adjustment capability in addition to sliding adjustment, improving the adaptability of dish cleaning operations. Users can adjust the downward pressure angle and position of the power unit 2 according to the size, depth, or stacking status of the dishes to ensure that the dishwashing sponge 3 can closely adhere to the bottom of the bowl for cleaning.

[0042] This adjustment system is not only suitable for cleaning regular bowls, plates, and dishes, but can also be used for scrubbing the surfaces of some irregularly shaped utensils with shallow edges or curved surfaces, improving cleaning efficiency while enhancing the compatibility of the device.

[0043] Meanwhile, the sliding stroke of the slide tube 13 can be limited by a limiting structure to prevent excessive pulling out or falling off. For example, an elastic buckle structure can be set inside the slide tube or a limiting block can be set at both ends. This structure facilitates long-term repeated adjustment and use, while ensuring the stability of the structure and the safety of user operation.

[0044] Specifically, the outer wall of the slide tube 13 is provided with a threaded hole, and a fastener is screwed into the inside of the threaded hole.

[0045] To ensure reliable fixation of the slide tube 13 after height or position adjustment, a threaded hole is provided on its outer wall, typically located in the middle or end of the sliding stroke. A fastener is screwed into this threaded hole for manual locking of the sliding position. To enhance user convenience, the fastener preferably features an externally designed pentagonal knob head, allowing users to directly rotate it with their fingers without any tools, enabling quick locking or unlocking. This is particularly suitable for kitchen operations involving wet hands or frequent adjustments.

[0046] The Torx head fastener can be made of plastic injection-molded stainless steel screw structure, ensuring both strength and comfort and anti-slip performance. The knob surface can be textured or rubber-coated to increase friction and anti-slip effect during operation.

[0047] The sliding fit clearance between the slide tube 13 and the hinge arm 12 is designed to be 0.2mm~0.5mm to ensure smooth adjustment and structural stability. When the user presses down on the bowl or adjusts the angle, the slide tube 13 is not easy to slip or wobble, providing stable support during the washing process.

[0048] If necessary, metal washers or soft retaining rings can be added to the fastener contact points to further enhance the locking effect and prevent wear on the slide tube surface caused by long-term pressing. This design greatly improves the durability and adjustment flexibility of the device.

[0049] Specifically, a waterproof cover 24 is screwed to the top of the base 21, a waterproof ring 27 is provided at the top of the inside of the waterproof cover 24, and a waterproof ring is provided at the connection between the waterproof cover 24 and the base 21.

[0050] Considering that the dishwasher needs to operate in a humid environment for a long time, especially since the power unit 2 is exposed to moisture, foam, and even cleaning solution splashes, a removable waterproof cover 24 is provided on the top of the base 21 to ensure the safe operation of the internal motor 25 and wiring system. The waterproof cover 24 is installed on the top of the base 21 by a threaded connection, which facilitates daily disassembly, maintenance, or replacement of protective components.

[0051] The waterproof cover 24 features a domed or sloping-top enclosed shell design, with a waterproof ring 27 at the top. This ring is typically made of elastic silicone or foamed rubber, with a diameter slightly larger than the connection point between the coupling 26 and the rotating output end. It achieves a tight seal through elastic deformation. This structure effectively prevents moisture from entering the motor cavity through the top gaps, protecting the internal electrical structure from moisture and ensuring long-term reliable operation.

[0052] In addition, a waterproof ring is provided at the threaded interface between the waterproof cover 24 and the base 21 to further prevent water from seeping into the interior along the thread gaps. This waterproof ring can be an O-ring or a gasket structure coated with sealant, forming an effective multi-level water barrier when tightened.

[0053] The entire waterproof encapsulation system can achieve an IPX4 level or higher protection rating, ensuring that even if water splashes, rinsing misoperation or other situations occur during use, the electrical safety and structural durability of the motor's internal structure can be maintained.

[0054] In addition, the waterproof cover 24 can be made of high-strength transparent polycarbonate (PC) or ABS material, which takes into account both impact resistance and corrosion resistance. The transparent structure makes it easy to observe the internal operating status, such as whether the motor is running or whether the connection is loose, and also facilitates daily self-inspection and maintenance by users.

[0055] Specifically, a plate-shaped groove 23 is provided on the right side of any leg 22 at the center line of the thickness of the leg 22, and a strain gauge is disposed inside the plate-shaped groove 23.

[0056] The base 21 of the power unit 2 is evenly provided with several flexible support legs 22, the main function of which is to support the entire dishwashing structure and provide the trigger condition for downward pressure feedback. To achieve high-sensitivity pressure recognition, a longitudinal plate-like groove 23 is precisely formed on the right side of each support leg 22 at the thickness midline. The plate-like groove 23 is a positioning structure for embedding strain gauges, and its depth and width are designed to match the shape of the strain gauges to ensure that the strain gauges fit stably and are not easy to fall out.

[0057] The strain gauge preferably adopts a resistance strain gauge structure, consisting of a metal foil, a substrate material, and a protective layer. After being embedded in the plate-shaped groove 23, it is fixed to the bottom surface of the groove by structural adhesive or hot pressing. When the bowl is pressed down, the strain gauge undergoes a slight bending deformation with the support leg 22, and its internal resistance value changes accordingly. The circuit system detects this change and converts it into an electrical signal, thereby determining whether the user has pressed down and whether the pressing force has reached the set value.

[0058] The support legs 22 are made of highly elastic nylon or glass fiber reinforced composite materials, possessing both the necessary flexibility to ensure sensitive strain gauge response and sufficient strength to support the stable operation of the entire dishwashing mechanism. The plate-shaped groove 23 is positioned in the right centerline area, which facilitates wiring and reduces stress unevenness caused by structural eccentricity, thereby improving overall response stability.

[0059] Multiple support legs can be equipped with multiple strain gauges to construct simple pressure distribution judgment logic. For example, a three-point judgment system can identify uneven force on different bowls, thereby optimizing the control algorithm to start the motor or adjust the motor speed. This strain feedback system is more sensitive and has a higher degree of automation than traditional button-type start or manual operation modes. Users only need to place the bowls face down to trigger the dishwashing action.

[0060] To prevent moisture or residual liquid in the kitchen from corroding or short-circuiting the strain gauges, the plate groove 23 can be filled with flexible sealant or covered with a protective cover strip. At the same time, a waterproof sleeve is installed at the circuit joint to ensure the reliability and safety of the system in long-term operation.

[0061] Specifically, the output end of the motor 25 is equipped with a coupling 26, the top of the coupling 26 is screwed with a fixing nut 28, and the top of the coupling 26 is screwed with a decorative cap 29. The fixing nut 28 and the decorative cap 29 are attached to the outer wall of the fixing ring 31.

[0062] To ensure a reliable transmission connection between the dishwashing sponge 3 and the motor 25, the output end of the motor 25 is mechanically connected to the dishwashing sponge 3 via a coupling 26. The coupling 26 adopts a hollow sleeve structure, with one end connected to the motor output shaft by compression or keyway, and the other end having a threaded interface for installing and fixing the dishwashing sponge 3.

[0063] The core connecting part of the dishwashing sponge 3 is the retaining ring 31, whose center hole mates with the external thread of the coupling 26. It is axially tightened by the retaining nut 28 to ensure that the retaining ring 31 can rotate stably with the coupling 26 when the motor rotates. The retaining nut 28 can be a metal knurled nut with radial patterns or a plastic outer coating for easy manual disassembly and replacement of the dishwashing sponge 3 assembly.

[0064] To enhance the overall aesthetics and safety of the device, a decorative cap 29 is added to the outside of the fixing nut 28. The decorative cap 29 is screwed to the coupling 26, and a fine thread can be used to improve the connection strength. The decorative cap 29 features a rounded, drum-shaped design to prevent accidental scratches during use, and provides a better human-machine interaction experience, especially when manually cleaning or replacing the dishwashing sponge.

[0065] Meanwhile, the decorative cap 29 provides secondary protection for the internal rotating structure, preventing sewage, food residue and other impurities from entering the coupling area through the top gap, extending the service life of the device and improving the overall sealing performance.

[0066] The detachable design of this connection structure allows users to quickly replace the dishwashing sponge 3 when it is worn, deformed, or heavily soiled. No tools are needed; simply rotate the decorative cap and loosen the fixing nut to complete the replacement. This is suitable for the frequent and fast-paced cleaning needs in a family kitchen.

[0067] Specifically, a wire groove 210 is provided at the bottom of the support leg 22 that is closest to and hinged to the hinge arm 12. The wire groove 210 contains wires, and a plug and transformer are provided on the outside of the wires. The output end of the wires is electrically connected to the motor 25.

[0068] To ensure a stable power supply to the motor 25 inside the power unit 2 and to achieve modular wiring management, a longitudinally penetrating wire groove 210 is provided at the bottom of the support leg 22 near and hinged to the hinge arm 12. The wire groove 210 is opened along the axial direction of the support leg 22 and has a groove or closed groove structure. It can be directly formed or have an embedded cover plate structure depending on the processing technology.

[0069] The cable tray 210 houses the power cord, which is typically made of flexible silicone wire or oil-resistant and flame-retardant PVC cable. It is bend-resistant, high-temperature resistant, and waterproof, ensuring it is not easily broken or short-circuited during flipping, sliding, or pressing. One end of the cord connects to the power supply terminal of the motor 25, while the other end extends to an external transformer and plug module, enabling pluggable connection between the device and mains power.

[0070] To adapt to the power supply environment of a home kitchen, the plug is equipped with an external transformer, which is responsible for converting the mains voltage (such as 220V) to a low-voltage safe voltage (such as 12V or 24V) for input to the dishwasher system. The transformer supports a waterproof housing and overcurrent protection, ensuring that the device can operate safely in humid or splashed water environments.

[0071] At the interface between the support leg 22 and the wire channel 210, a rubber wire sleeve or a plastic wire exit protection ring can be provided to prevent the wire from directly contacting the edge and causing wear. The entire wire routing path is designed to fit the spatial layout of the flip bracket and sliding assembly as closely as possible to ensure that the wire is not excessively stretched or bent even during multiple folding, sliding, and flipping processes.

[0072] In addition, to meet different usage needs, the device can be equipped with a wireless power supply module or a battery power supply system, making it particularly suitable for short-term split use or outdoor use scenarios.

[0073] Specifically, the decorative cap 29 has anti-slip texture on its outer side, and the decorative cap 29 and the coupling 26 are connected by a thread in the opposite direction to the motor output direction.

[0074] To enhance the user's manual operation experience when replacing or assembling the dishwashing sponge 3 components, the decorative cap 29 features an anti-slip textured structure on its outer side. This anti-slip texture consists of one or more evenly distributed raised stripes or granular dots, which significantly increases the friction between the fingers and the cap during rotation, preventing slippage and ensuring smooth operation. This is especially useful in kitchen environments where hands are wet or oily.

[0075] The anti-slip texture can be arranged in various ways, including radial stripes, concentric circle protrusions, and diagonally interlaced grids. A one-piece molded structure is preferred to ensure wear resistance, washability, and long-term durability without peeling. The decorative cap 29 can be made of ABS plastic or rubber-coated metal, and the outer anti-slip layer can be covered with soft silicone to further enhance tactile comfort and operational safety.

[0076] Furthermore, this anti-slip structure not only facilitates user operation but also enhances the overall aesthetic appeal of the machine, making the dishwasher both functional and aesthetically pleasing. Thanks to the anti-slip texture, users can easily open and close the machine by simply rotating the handle without additional tools when replacing the dishwashing sponge or performing maintenance, adhering to the human-centered design principles of home appliances.

[0077] To prevent the decorative cap 29 from loosening and falling off during the operation of the motor 25 due to rotational inertia or micro-vibrations caused by long-term use, the matching relationship between the rotation direction of the motor output shaft and the thread connection direction is as follows: if the output direction of the selected motor 25 is clockwise (viewed from above), the thread connection direction between the coupling 26 and the decorative cap 29 should be designed as a left-hand thread, so that when the motor is rotating, the rotation trend always tends to tighten the threaded interface, thereby producing a self-locking effect of "tightening as it rotates"; conversely, if the motor rotates counterclockwise, a right-hand thread should be used for fixing.

[0078] The principle behind this structure is to utilize the frictional force generated by rotation to always apply to the threaded mating surface, forming a preload force. This prevents the decorative cap 29 from gradually loosening or even falling off under long-term operation or high-frequency start-stop conditions, ensuring safety and structural stability.

[0079] To further enhance the locking effect, a small amount of threadlocker (such as Type 242 medium-strength threadlocker) can be applied to the threaded interface between the decorative cap 29 and the coupling 26 after tightening, or an embedded retaining ring structure can be set to provide an additional anti-loosening mechanism, suitable for long-term reliable operation in kitchen use scenarios with frequent vibrations.

[0080] Specifically, the length of the sponge sleeve 32 ranges from 50mm to 160mm.

[0081] The sponge sleeve 32, as the outermost working part of the dishwashing sponge 3, directly contacts the surface of the dishes and plays a major role in removing grease, limescale, and food residue. To accommodate the cleaning needs of different sized dishes, its length range is set from 50mm to 160mm, covering the cleaning diameter range of various tableware from small cups and saucers to large soup bowls and salad plates.

[0082] The length of the sponge sleeve 32 refers to the overall height of the scrubbing area extending from the outside of the fixing ring 31. Users can choose different lengths of sponge sleeves to replace them according to their actual needs. For example, a short structure (e.g., 50mm-80mm) is suitable for cleaning small bowls, rice bowls, or children's tableware, while a long structure (e.g., 120mm-160mm) is suitable for thoroughly cleaning the inner walls of large bowls, deep plates, and other utensils.

[0083] The sponge sleeve structure typically uses soft, hydrophilic materials, such as high-density sponge, fine-pore polyurethane foam, or three-layer composite scrubbing materials. These materials possess excellent softness and resilience, allowing them to conform to the curved contours of dishes as the scrubbing sponge rotates, generating gentle friction at the contact points to achieve efficient and non-damaging scrubbing results.

[0084] To improve durability and mildew resistance, an antibacterial coating can be added to the surface of the sponge cover, or the edges can be sealed using a heat-pressing process to prevent them from fraying. Some sponge covers can also be covered with a microfiber scrubbing layer or a mesh layer to enhance their ability to remove stubborn stains.

[0085] The sponge sleeve is fixed to the sheet structure by a sleeve or snap-fit ​​structure, which makes it easy for users to quickly replace it; its standardized size facilitates mass production and later maintenance, reducing the cost of consumables.

[0086] This length range design ensures versatility and enhances adaptability to various types of household tableware, making it one of the key structural features that enables the device to achieve "multi-bowl compatibility and thorough cleaning". To improve the flexibility and adaptability of the dishwashing sponge 3 during use, the sheet-like structure fixed to the fixing ring 31 is preferably made of a highly elastic and repeatedly bendable material. The sheet-like structure is evenly arranged along the circumference of the fixing ring 31, generally consisting of 6 to 12 pieces, and can be in the shape of a flat strip, an arc-shaped blade, or a short plate structure.

[0087] The following types of structural materials are recommended: Polypropylene (PP): moderately rigid and flexible, low cost, and fatigue resistant; Thermoplastic polyurethane elastomer (TPU): It has excellent resilience, abrasion resistance, and hydrolysis resistance. Glass fiber reinforced nylon (PA66+GF): It has good structural rigidity and sufficient elasticity at medium to thin thicknesses.

[0088] These sheet-like structures are slightly upturned under normal conditions, forming the basic shape support of the sponge sleeve 32. When in use, after the user places the bowl upside down on the surface of the sponge sleeve, the sheet-like structures will bend significantly with the pressure of the bowl, and will be in a state of inward contraction, thereby causing the sponge sleeve to conform inward to the bowl wall, achieving flexible wrapping and washing.

[0089] The deformation range can be controlled between 0° and 60°, and the compressed length can reach 1 / 3 to 1 / 2 of its initial state. Even after prolonged pressure, it can quickly return to its original shape, ensuring effective support and coverage for the next use. This structure is not only suitable for common rice bowls and soup bowls, but also adaptable to plates with large rims or non-circular tableware, such as oval dishes.

[0090] Furthermore, to prevent damage to the sheet structure due to stress concentration during repeated deformation, a flexible transition connection is used between the fixing ring 31 and the sheet structure. This flexible transition can be achieved through soft adhesive or soft slots, effectively extending the service life. The motor 25 operates at a speed between 60 and 300 revolutions per minute, or approximately 1 to 5 revolutions per second. This speed range is based on the natural rhythm of hand-washing dishes, matching the actual friction time and pressure frequency required for washing dish surfaces. It prevents the sponge sleeve 32 from slipping on the bowl surface due to excessive speed, and also avoids water splashing and dish displacement caused by high-speed rotation, effectively improving cleaning stability and user safety. The low speed setting, such as 60 rpm, is suitable for lightweight glassware and small bowls requiring less force. The medium speed setting, such as 120-180 rpm, is the commonly used range, suitable for mainstream tableware such as ceramic bowls and vegetable bowls. The high speed setting, 240-300 rpm, can be used for cleaning heavier oil stains or crevices. By appropriately increasing the rotation speed, the scrubbing density and cleaning efficiency are increased. Combined with the flexible and conforming structure of the dishwashing sponge 32, the sponge sleeve 32 rotates... The motor maintains constant and uniform contact pressure against the surface of the bowl, thus achieving an efficient cleaning process. To further enable intelligent adjustment, strain gauges inside the power unit 2 are used to sense the deformation amplitude of the support leg 22 during the downward pressure of the bowl, and convert it into a pressure signal input to the control circuit. The control system matches the preset PWM speed adjustment command according to the pressure magnitude, thereby controlling the motor 25 to achieve graded speed control. When the user applies light pressure to scrub, the motor starts at a low speed, and the motor speed increases synchronously as the downward pressure increases, forming an intuitive operation feedback logic of "the harder the pressure, the faster the rotation". This not only eliminates the need for the user to manually adjust the speed, but also enables adaptive scrubbing force control. In addition, after the user removes the bowl, the strain gauge signal quickly drops below the threshold, and the system automatically shuts off the motor to avoid energy waste and noise interference caused by idling. The overall operation is efficient, quiet, and safe, making it particularly suitable for the frequent dishwashing needs in a home kitchen environment.

[0091] To enable the dishwashing device to automatically control the washing speed based on the pressure applied to the dishes, the entire control system comprises the following core modules: a strain gauge sensing module detects the minute deformation of the support leg 22 during pressing and outputs a corresponding micro-voltage signal; a signal conditioning module amplifies and filters the weak strain voltage to bring it within a range recognizable by the processor; a main control module receives the conditioned signal and performs real-time voltage analysis, outputting corresponding control commands based on the set pressure-speed mapping relationship; a motor drive module receives the main control signal and converts it into PWM voltage or current to control the motor; and a power supply and switching module provides stable power to the entire system, with a switching structure controlling the system's on / off state. The entire system forms a self-sensing, self-adjusting, self-starting, and self-shutting automated control chain, completing the washing task without user intervention.

[0092] The key components of the system can be specifically selected from the following parts: The strain gauge sensing module can use a metal foil strain gauge, such as BF350-3AA, with a resistance of 350Ω, offering high sensitivity and fast response; the signal conditioning module can use a high-precision instrumentation amplifier chip such as INA333 or AD620, featuring low noise and high gain; the main control module can use a common low-power microcontroller such as STM32F103C8T6, ESP32, or Arduino Nano, with multi-channel ADC and PWM output functions; the motor drive module can use an L298N dual H-bridge driver board, or a custom drive system can be built using MOSFETs such as IRF540N paired with a TL494 pulse width modulation control chip; the motor part can use an RS-775 DC motor, paired with a metal gear reducer with a reduction ratio of 1:50, allowing the output shaft speed to be between 60 and 300 rpm, driving the dishwashing sponge to achieve smooth rotation; the power supply module is recommended to use DC 12V. The 2A regulated power adapter has a switch structure that can be set as a single-pole single-throw rocker switch or a slide switch with indicator light, which is connected in series in the positive power supply line to control the power status of the whole machine.

[0093] When the user presses the bowl onto the sponge sleeve 32, the support leg 22 undergoes a slight deformation under pressure. The strain gauge generates a corresponding micro-voltage signal, which is amplified by the signal conditioning module and input to the analog voltage acquisition terminal of the main control chip. The main control chip determines the pressure range corresponding to the current pressure and outputs PWM signals with different duty cycles to control the motor drive module. The drive module adjusts the motor output power and speed, thereby driving the dishwashing sponge to rotate and complete the cleaning operation. As the downward pressure increases, the PWM duty cycle increases synchronously, the motor speed increases, and the washing speed increases, forming a "heavier pressure, faster rotation" response logic. When the user releases or removes the bowl, the support leg 22 returns to its original shape, the strain gauge signal quickly drops below the stop threshold, the main control chip interrupts the PWM output, and the motor stops rotating, thus realizing the automatic start-stop function. By setting a physical power switch, the user can control the system's on / off state at any time to ensure safety. The system is highly responsive and stable in operation, enabling continuous control modes with no buttons, no delay, automatic start-stop, and dynamic speed adjustment during dishwashing, greatly improving the convenience and intelligence of the small household kitchen dishwasher.

[0094] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0095] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A small household dishwasher, comprising a flipping bracket (1), characterized in that: The flip bracket (1) is fixedly mounted on the edge of the dishwashing sink. The moving end of the flip bracket (1) is slidably mounted with a power device (2), and the output end of the power device (2) is mounted with a dishwashing sponge (3). The power unit (2) includes a base (21), the outer wall of the base (21) is provided with a bendable support leg (22), the inside of the support leg (22) is provided with a strain gauge, and the pressure value range generated by the bending of the strain gauge is used to control the start and stop of the motor (25) provided inside the base (21); The output end of the power unit (2) is provided with a connection structure, and the dishwashing sponge (3) can be replaced through the connection structure; The dishwashing sponge (3) includes a retaining ring (31), and a flexible sheet structure is welded to the outside of the retaining ring (31). A sponge sleeve (32) is fitted over the outside of the sheet structure.

2. The household mini dishwasher according to claim 1, characterized in that: The flipping bracket (1) includes a fixed base (11), a fixed arm is fixed to the top of the fixed base (11), and a hinge arm (12) is hinged to the end of the fixed arm. The power device (2) is hinged to the end of the hinge arm (12).

3. A small household dishwasher according to claim 2, characterized in that: The outer side of the hinge arm (12) is slidably fitted with a slide tube (13), and the outer side of the slide tube (13) is hinged with a connector (14), which is hinged to the base (21).

4. A small household dishwasher according to claim 3, characterized in that: The outer wall of the slide tube (13) is provided with a threaded hole, and a fastener is screwed into the inside of the threaded hole.

5. A small household dishwasher according to claim 1, characterized in that: A waterproof cover (24) is screwed to the top of the base (21), and a waterproof ring (27) is provided at the top of the inside of the waterproof cover (24). A waterproof ring is provided at the connection between the waterproof cover (24) and the base (21).

6. A small household dishwasher according to claim 1, characterized in that: A plate-shaped groove (23) is provided on the right side of any leg (22) at the center line of the thickness of the leg (22), and the strain gauge is disposed inside the plate-shaped groove (23).

7. A small household dishwasher according to claim 1, characterized in that: The output end of the motor (25) is equipped with a coupling (26), the top end of the coupling (26) is screwed with a fixing nut (28), the top end of the coupling (26) is screwed with a decorative cap (29), and the fixing nut (28) and the decorative cap (29) are held on the outer wall of the fixing ring (31).

8. A small household dishwasher according to claim 2, characterized in that: The bottom of the support leg (22) which is closest to and hinged to the hinge arm (12) is provided with a wire groove (210). The wire groove (210) contains a wire, and a plug and a transformer are provided on the outside of the wire. The output end of the wire is electrically connected to the motor (25).

9. A small household dishwasher according to claim 7, characterized in that: The decorative cap (29) has anti-slip texture on its outer side, and the decorative cap (29) and the coupling (26) are connected by a thread in the opposite direction to the motor output direction.

10. A small household dishwasher according to claim 1, characterized in that: The length of the sponge sleeve (32) ranges from 50mm to 160mm.

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