At a glance
| Patent number | CN212261293U (application CN202020159775) |
| Type | China utility model (实用新型) - protects product shape and structure |
| Original title | Flat mop belt cleaning device (一种平板拖把清洗装置) |
| Patent owner | Bazhou Liangjie Household Products Co Ltd |
| Inventors | Yao Guohui, Ren Junshan, Yao Guojie |
| Filing date | 2020-02-11 |
| Grant date | 2021-01-01 |
| Status (China) | In force in China until at most 2030-02-11 (if annual fees are paid) |
| Patent family | Chinese filings only - no US, European, Japanese, PCT or other filings listed |
| Cited by | 1 later document |
| Source | Google Patents (search for CN212261293U) |
What the claims cover, in plain language
Claim 1 - A flat mop cleaning device comprising a mop bucket and a flat mop. The flat mop includes a mop rod and a mop head movably connected to the rod, with wiping material on the head. The mop bucket includes a bucket body and a bucket cover fixed over the upper opening of the body. An insertion hole is provided on the cover. The flat mop is inserted through this hole so the wiping material is washed inside the bucket body, and then squeezed after washing is complete.
Claim 2 - The inner sidewall of the bucket body has a positioning recess located below and corresponding to the insertion hole. Claim 3 - A positioning boss is fixed on the opposite inner sidewall, protruding inward, working together with the recess to guide the mop. Claim 4 - A cleaning mechanism is disposed inside the bucket body to perform the washing and wringing. Claim 5 - A driving mechanism inside the bucket drives the cleaning mechanism to operate automatically. Claim 6 - A reed switch is placed in the positioning recess, and a magnet is fixed at the lower end of the mop rod. Inserting the mop aligns the magnet with the switch to trigger automatic washing and subsequent squeezing. Claim 7 - A solenoid valve and circuit board are provided. The reed switch and solenoid valve connect to the board. The valve sits in a water inlet channel; triggering the switch opens the valve to let water in for washing, and closing it stops the flow for squeezing. Claims 8-10 onward - Detail the driving motor mounted in an external recess, connected to the cleaning assembly via a connecting assembly passing through the bucket wall.
This is a simplified reading for orientation only. The legal scope is defined by the exact claim wording in the official Chinese document.
What this means for US production
This patent was filed only in China and is currently in force there. It has no US or other foreign counterpart. However, because it is active in China, making or selling this specific design in China needs the owner’s permission. Manufacturing outside of China for sale in the US is not restricted by this particular document.
Two points to settle early:
- Other patents may exist. Motorized mop buckets and self-wringing cleaning systems are actively patented globally by various appliance manufacturers. Although no foreign patents cite this specific Chinese utility model, competing designs for automated mop washing exist. A freedom-to-operate (FTO) review focusing on the magnetic trigger, solenoid water control, and motor-driven wringing mechanism is necessary before committing to tooling for the US market.
- Water and electrical separation. The patent places the motor in an external recess and seals the reed switch in a guide tube. For US production, the engineering team must verify that these sealing methods meet consumer safety expectations for devices combining water flow and electrical motors.
Customization and manufacturing
What can be customized
| Area | Options |
|---|---|
| Bucket dimensions | Sized to fit standard flat mop widths (to be confirmed in design) |
| Power source | AC adapter for stationary use, or rechargeable battery pack for cordless carts |
| Water inlet | Threaded fitting for garden hose, or quick-connect for indoor plumbing |
| Motor type | Brushed or brushless DC motor, selected based on torque needed for wringing |
| Plastics | PP or ABS for the bucket body and cover; material grade chosen for impact resistance |
| Control logic | Circuit board programmed for specific wash/wring durations (set in design / confirmed on prototypes) |
| Mop compatibility | Insertion hole profile adapted to the buyer’s specific flat mop head dimensions |
Things to plan for (US market)
- UL 1017 or UL 499 - Depending on whether the device is classified primarily as a motorized floor-care appliance or a water-heating/pumping appliance, Underwriters Laboratories standards for household electrical products apply.
- FCC Part 15 - The circuit board controlling the motor and solenoid valve emits radio frequency energy and must comply with FCC rules for unintentional radiators sold in the US.
- California Proposition 65 - All plastics, wiring insulation, and metal components must be screened for listed chemicals.
- NSF/ANSI 61 or FDA 21 CFR - If the device is marketed for food-service environments where the water contacts food-prep surfaces indirectly, materials touching the water path may need food-contact clearance.
How a project runs
- Inquiry - Define the target mop size, power preference, water source type, and expected volume.
- Design - Engineer the bucket mold, select the motor and solenoid valve, design the circuit board, and map the waterproof seals.
- Prototype - Produce 3D-printed or soft-tooled samples to test the magnetic trigger alignment, water flow rate, and wringing torque.
- Pilot run - Manufacture a small batch using production molds for lifecycle testing, electrical safety verification, and water ingress checks.
- Production - Injection molding of the bucket and cover, PCBA assembly, motor installation, final waterproofing, and packaging.
Quantities & timeline
The bucket body and cover require large injection molds. The driving motor, solenoid valve, and circuit board are sourced as electronic sub-assemblies. Certification testing for electrical safety and FCC compliance adds significant time before mass production can begin. Send us your target mop dimensions, power requirements, water inlet preferences, estimated order quantity, and target price, and we will reply with options.
Patent drawings










































Drawings reproduced from the public patent document for reference.


