Clamp-On Portable High Chair with Adjustable Legs and Fabric Seat

Patent & Production

At a glance

What the claims cover, in plain language

Claim 1 defines a novel dining table chair for children comprising two symmetrical chair feet and a chair cover. Each chair foot includes an upper arm, a lower arm, and a flexible (telescopic) arm. The upper arm is set horizontally on the tabletop, cooperating with the lower arm and flexible arm. The lower arm is rigidly coupled to the upper arm and abuts the table bottom. The flexible arm is rotatably installed on the lower arm via a rotating seat and abuts the table bottom. The two chair feet are connected by a U-shaped link. The chair cover is sleeved over the U-shaped link, equipped with two fastening belts on its sides, and installs mutually with the chair feet.

Claim 2 specifies that the upper arm has a pipe arm with an anti-slip sleeve head sleeved on its end to prevent slipping on the tabletop. The sleeve head has a bottom pad with anti-slip lines.

Claim 3 states the anti-skid sleeve head, bottom pad, and anti-skid grains are integrally manufactured.

Claim 4 describes the lower arm as having two bending parts and a U-shaped structure, with one end fixed to the upper arm and the other sleeved with a rubber head to abut the table bottom.

Claim 5 details the telescopic arm arranged between the bending parts, comprising a sleeve, an adjusting screw rod, and a butt joint head. The screw rod threads into the sleeve to adjust the distance between the butt joint head and the upper arm’s anti-slip sleeve head.

Claim 6 mentions a strip-shaped rotating opening on the upper arm’s sidewall, where the U-shaped connecting frame is movably arranged via an elastic telescopic rod.

Claim 7 defines the chair cover as consisting of an upper cover, a seat cover, and a T-shaped belt, connected to form the seating area on the U-shaped frame.

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 in China and is currently in force. The public record shows no US or other foreign counterpart. Making or selling this specific design in China would require the owner’s permission. However, because there is no US patent, the design itself is not restricted in the United States.

Two points to settle early:

• Other patents may exist. The baby gear sector is heavily patented, particularly regarding clamp mechanisms and safety standards. While this specific utility model has no foreign citations, independent US patents may cover similar clamp-on high chair structures or safety features. A freedom-to-operate (FTO) review is recommended before launching in the US market.
• Safety Standards Compliance. Regardless of patent status, US sales must comply with strict consumer product safety regulations (e.g., ASTM F1235). Design modifications may be necessary to meet these standards, which could alter the product structure.

Customization and manufacturing

What can be customized

Things to plan for (US market)

• ASTM F1235 - Standard Consumer Safety Specification for Booster Seats. Although this is a clamp-on high chair, elements of booster seat standards regarding restraint systems and stability apply.
• CPSC Guidelines - General requirements for children’s products, including lead content in paint/coatings and phthalates in plastics.
• 16 CFR 1501 - Small Parts Regulation: Ensure no detachable small parts pose choking hazards.
• Flammability - Fabrics must meet specific flammability standards for children’s sleepwear and accessories (though high chairs are distinct, general textile safety applies).

How a project runs

1. Inquiry - Define target table thickness range, load capacity, and aesthetic preferences.
2. Design Refinement - CAD modeling of the telescopic mechanism and seat geometry to ensure ergonomic fit and safety compliance.
3. Prototyping - Create functional samples using 3D printing for fit checks and CNC machining for critical load-bearing components.
4. Testing - Conduct static load tests, tip-over tests, and small-parts/bite-force tests per ASTM/CPSC guidelines.
5. Production - Finalize tooling for injection molded parts and fabric cutting/sewing patterns. Begin mass production after passing pre-production inspection.

Quantities & timeline

Tooling for plastic components (sleeves, knobs) typically takes 4-6 weeks. Metal tube forming dies require 3-5 weeks. Fabric sourcing and sewing line setup adds another 2-3 weeks. Initial prototypes are available within 2 weeks of design freeze. Full production lead time depends on order volume but generally starts 8-10 weeks after tooling approval. Send us your specifications, estimated quantity, and target launch date and we will reply with options.

Patent drawings

Drawings reproduced from the public patent document for reference.

Production notes

Tooling and process

Manufacturing likely involves steel tube forming for the upper and lower arms, followed by press-fit assembly. Plastic components like the adjusting screw handles and anti-slip caps typically use PP or ABS injection molding. The fabric seat requires precision cutting and sewing. Assembly relies on snap-fits for plastic covers and screws with thread lock for mechanical joints.

Cost drivers

Key cost factors likely include material certification for safety-compliant plastics and fabrics, part count complexity, and rounded edges/tooling for metal tubes to prevent injury. Packaging design also impacts logistics costs due to the product’s shape.

Prototyping path

We would typically start with a 3D-printed fit sample to verify the telescopic mechanism’s range. Proceed to material certificates for fabric and plastic. Build a load sample using actual steel tubes to test weight capacity. Perform small-parts and pinch tests before finalizing tooling.

What we would change before tooling

We would likely refine the thread engagement of the adjusting screw to ensure consistent torque resistance. Wall thickness of the steel tubes should be optimized to balance weight and rigidity. Joint designs for the U-frame connection need reinforcement to avoid stress fractures.

Common failure points

Issues typically include spring fatigue in the elastic telescopic rods, tipping if the center of gravity shifts excessively, and flammability risks if fabric treatments degrade. Pinch points at the clamp interface and small parts detaching from the belt buckles are critical safety concerns to address.

Frequently asked questions

Does this chair fit all dining tables?

The patent describes an adjustable telescopic mechanism that allows the clamp to accommodate tables of different thicknesses. However, it requires a table with a straight edge and accessible underside. Tables with thick aprons or unusual shapes may not fit. Specific thickness ranges should be confirmed in design.

Is the fabric seat washable?

The patent mentions a fabric chair cover with fastening belts. While it doesn’t specify washing instructions, removable covers are typically designed for easy cleaning. Material selection (e.g., polyester vs. cotton) affects washability and durability, which is determined during the prototyping phase.

How secure is the clamp mechanism?

The design uses an adjusting screw rod to tighten the clamp against the table. The patent includes anti-slip rubber sleeves on both the top and bottom contact points to enhance grip and protect the table surface. Stability is verified through load testing during development.

Can the chair be folded for storage?

Yes, the patent describes a U-shaped connecting frame with elastic telescopic rods that allow the chair feet to rotate in opposite directions. This feature facilitates compact folding and easier storage when the chair is not in use.

What safety standards does it meet?

The patent itself does not list certifications. For US sales, the product must comply with ASTM F1235 and CPSC regulations. We recommend conducting third-party testing on prototypes to ensure adherence to current safety standards before mass production.

Is there a weight limit for the child?

The patent does not specify a weight limit. Load capacity depends on the steel tube thickness, plastic component strength, and fabric durability. These parameters are set in design and confirmed on prototypes through rigorous static and dynamic load tests.

Can this design be made and sold in the US?

The patent is in force in China, but the public record shows no US counterpart. Therefore, making or selling this specific design in the US is not restricted by this patent. However, other US patents may exist in the baby gear field, so a freedom-to-operate review is advised.

Are you affiliated with the patent owner?

No. IP2M is an independent design and manufacturing service working from the public patent document.

Request a quote

Click Request a Quote below to see our email address - copy it, or open your email app with a ready-made message. Please mention patent CN215456818U in the subject.

Helpful details to include:

• Your company and channel (baby brand, retailer, wholesaler)
• Target table thickness range and load capacity requirements
• Material preferences for fabric and plastics
• Estimated quantity and target price
• Timeline - when you would like samples and the first shipment

You can also reach us at (332) 203-9997.