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Patent Information & Production OptionsWaterproof Electric Hair Clipper with Adjustable Cutter Head and Limiting Comb · Patent CN110900667B

Patent CN110900667B: bibliographic data, legal status, family, a plain-language reading of the claims, plus customization, US compliance points and how a manufacturing project runs.

At a glance

Patent numberCN110900667B (application CN201910987207)
TypeChina invention patent (发明专利) - protects product structure and function
Original titleWaterproof electric hair clipper with adjustable cutter head and limiting comb (可调节刀头和限位梳的防水电推剪)
Patent ownerShanghai Povos Electric Works Co Ltd
InventorsSu Jinjun, Zeng Wenli, Liu Jianguo
Filing date2019-10-15
Grant date2025-06-10
Status (China)In force - valid until at most 2039-10-15, subject to payment of annual fees
Patent familyChinese filings only - no US, European, Japanese, PCT or other filings listed
Cited by0 later documents
SourceGoogle Patents (search for CN110900667B)

What the claims cover, in plain language

Claim 1 defines a waterproof electric hair clipper comprising an upper cover, lower cover, cutter head assembly, limiting comb adjusting mechanism, semi-exposed cutter head adjusting mechanism, and a waterproof machine core. The key structural features include:

  • Comb Mechanism: A limiting comb frame with sliding grooves and a first gear block fixed in the lower cover’s groove. The comb has convex edges matching the frame and teeth meshing with the gear block, aided by a spring.
  • Blade Adjustment: A rotating ring with an irregular inner track drives a pushing block. This block connects to a cutter head rotating frame, which holds the movable cutter. A spring ensures connection between the frame and the cutter fixing piece.
  • Core Integration: The rotating ring meshes with a conical second gear block housed in a groove below the waterproof machine core. This block contains a second spring.

Claim 2 specifies that the track on the rotating ring is irregular. Claim 3 states the second gear block is hollow. Claim 4 details the elastic waterproof mechanism for the lamp window, involving a waterproof upper shell, super-welded connection, and a rubber ring secured by a screw and fixing piece. Claim 5 describes the wire guide in the lower cover, which includes a fixed block and a waterproof ring between the guide and the block to seal the cable entry.

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. Making or selling this specific mechanical configuration in China requires the owner’s permission. However, since there are no corresponding patents in the US or Europe, the design itself is not restricted by this patent in those markets.

Two points to settle early:

  • Other patents may exist. Electric shavers and clippers are a crowded IP field. Major brands hold numerous patents on blade geometry, motor control, and waterproofing methods. A freedom-to-operate (FTO) review is essential to ensure your specific implementation does not infringe on existing US patents unrelated to this Chinese document.
  • Mechanical Complexity. The interplay between the irregular track, conical gear block, and spring-loaded comb adds assembly steps. Cost analysis should focus on tolerance stacking in these moving parts to ensure smooth operation without jamming.

Customization and manufacturing

What can be customized

AreaOptions
Blade MaterialStainless steel, titanium-coated, or ceramic (as per supplier specs).
Comb RangeNumber of positions and length increments set by the tooth pitch on the gear block.
Housing ColorABS/PC plastics available in various colors and finishes (matte/gloss).
Battery TypeLi-ion cells can be swapped based on capacity requirements (voltage/current TBD).
Sealing LevelRubber ring hardness and fit can be tuned for different IP ratings (e.g., IPX4 vs IPX7).
InterfaceCharging port type (USB-C, magnetic) and indicator light brightness/color.

Things to plan for (US market)

  • FCC Part 15 - If the device contains any wireless modules (Bluetooth for app connectivity), certification is required. The base clipper described here appears wired/battery-only, but verify if smart features are added.
  • FDA Regulations - While not a medical device, electrical grooming appliances must meet general safety standards. UL 60335-2-23 is the common standard for household and similar electrical appliances – Particular requirements for skin and hair care appliances.
  • Proposition 65 (California) - Plastics and metal coatings must be screened for lead, cadmium, and phthalates.
  • RoHS Compliance - Ensures hazardous substances are restricted in electrical/electronic equipment components.

How a project runs

  1. Inquiry - Define target price, quantity, and desired IP rating.
  2. Design Validation - Review mold feasibility for the irregular track and conical gear.
  3. Prototype - Build functional units to test comb durability and blade adjustment precision.
  4. Certification Prep - Submit samples for safety and EMC testing.
  5. Production - Injection molding, motor assembly, sealing checks, and final packaging.

Quantities & timeline

Molds for the complex internal gear blocks and rotating rings require high-precision tooling. Assembly involves manual insertion of springs and rubber seals, impacting labor costs. Certification testing typically takes 4-6 weeks. Send us your target quantities, desired IP rating, and battery specifications and we will reply with options.

Patent drawings

Waterproof Electric Hair Clipper with Adjustable Cutter Head and Limiting Comb - Patent Fig. 1
Fig. 1 - Perspective view of the clipper.
Waterproof Electric Hair Clipper with Adjustable Cutter Head and Limiting Comb - Patent Fig. 2
Fig. 2 - Exploded view of the main components.
Waterproof Electric Hair Clipper with Adjustable Cutter Head and Limiting Comb - Patent Fig. 3
Fig. 3 - View of the lower cover and comb mechanism.
Waterproof Electric Hair Clipper with Adjustable Cutter Head and Limiting Comb - Patent Fig. 4
Fig. 4 - Detailed view of the limiting comb and gear block.
Waterproof Electric Hair Clipper with Adjustable Cutter Head and Limiting Comb - Patent Fig. 5
Fig. 5 - Cross-section of the cutter head adjustment mechanism.
Waterproof Electric Hair Clipper with Adjustable Cutter Head and Limiting Comb - Patent Fig. 6
Fig. 6 - View of the rotating ring and pushing block.
Waterproof Electric Hair Clipper with Adjustable Cutter Head and Limiting Comb - Patent Fig. 7
Fig. 7 - Structure of the waterproof machine core.
Waterproof Electric Hair Clipper with Adjustable Cutter Head and Limiting Comb - Patent Fig. 8
Fig. 8 - Detail of the wire guide and sealing.

Drawings reproduced from the public patent document for reference.

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  4. 4 Pilot run Small first batch for launch customers
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This page is based on the public patent document CN110900667B, assigned to Shanghai Povos Electric Works Co Ltd. IP2M is an independent manufacturing service and is not affiliated with, endorsed by or licensed by the patent owner. Images marked as concept renderings are illustrations, not photos of an existing product. Patent status information is provided for reference only and is not legal advice; confirm freedom to operate for your market before production. Full disclaimer.