IP2M Logo
IP2M

Patent Information & Production OptionsChair Back Table with One-Way Locking Mechanism for Adjustable Seats · Patent CN116039479B

Patent CN116039479B: 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 numberCN116039479B (application CN202310327628)
TypeChina invention patent (发明专利) - protects product shape, structure, and method
Original titleChair back table, adjustable seat and vehicle (一种椅背桌板、可调座椅以及车辆)
Patent ownerNingbo Shuaitelung Automotive Systems Co ltd
InventorsCao Xiaopeng, Dong Lin, He Zhuyuan, Gan Chunlei
Filing date2023-03-30
Grant date2024-05-17
Status (China)In force - valid until at most 2043-03-30, provided annual maintenance fees are paid
Patent familyChinese filings only - no US, European, Japanese, PCT or other filings listed
Cited by0 later documents
SourceGoogle Patents (search for CN116039479B)

What the claims cover, in plain language

Claim 1 defines an adjustable seat comprising a table top body (100) with a rotating shaft (200). It includes a locking mechanism (300) made of a fixed member (310), a rotating member (320), and a clamping spring (330). The rotating member connects to the shaft. The spring wraps around the rotating member, with one end fixed to the fixed member. The spring grips the rotating member to limit unidirectional rotation (preventing opening). A pressable unlocking block (400) connects to the other end of the spring; pressing it pushes the spring to release the grip. The claim further specifies a torsion spring (500) connected to the shaft to apply force for flipping the table open. It also details a chair back (700) with a receiving groove (710) where the table fits, and the shaft splitting into a first shaft (210) and second shaft (220).

Claim 2 adds a damper (600) connected to the rotating member to control motion. Claim 3 specifies that the table top body consists of a first plate (110) and second plate (130) connected by a hinge (120), with the shaft on the first plate. Claims 4-5 describe the installation within the chair back’s side holes (720, 730), where the locking mechanism and torsion spring are housed respectively.

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. Therefore, manufacturing or selling this specific design in the United States does not infringe on this particular Chinese patent. However, since the patent is active in China, exporting products made using this technology to China could potentially face issues if the local rights holder enforces their patent.

Two points to settle early:

  • Other patents may exist. Automotive interior mechanisms and folding tables are heavily patented fields globally. Major suppliers like Lear, Adient, and Faurecia hold numerous patents on similar locking and deployment systems. A freedom-to-operate (FTO) review is essential to ensure your specific implementation does not violate other active US or international patents.
  • Material Safety. As an automotive component, materials must meet strict flammability and toxicity standards (e.g., FMVSS 302 in the US). The choice of plastics for the spring and housing affects both safety compliance and durability.

Customization and manufacturing

What can be customized

AreaOptions
Table SurfaceSize, material (ABS, PP, wood veneer), texture, color
Mechanism HousingIntegrated into seat frame vs. standalone module
Spring TypeMaterial (stainless steel, coated wire), tension strength
Assist FeaturesTorsion spring stiffness, damper damping coefficient
Mounting InterfaceBolt patterns compatible with various seat frames
FinishPaint, powder coat, or raw engineering plastic appearance

Things to plan for (US market)

  • FMVSS 302 - Flammability of interior materials; all components in the passenger compartment must pass burn rate tests.
  • EPA VOC Regulations - Volatile organic compound emissions from plastics and adhesives used in the assembly.
  • ISO 16750 / AEC-Q - Environmental testing standards for automotive electronics and mechanical parts (vibration, temperature cycling), often adopted by US automakers.
  • RoHS/REACH - While primarily EU regulations, many US supply chains enforce these substance restrictions for global compatibility.

How a project runs

  1. Inquiry - Define table dimensions, load requirements, and integration method (seat model).
  2. Design - CAD modeling of the locking mechanism, spring selection, and housing design.
  3. Prototype - 3D printed housings and custom-wound springs for functional testing.
  4. Pilot Run - Injection molding tooling, assembly line setup, and durability testing (cycle life).
  5. Production - Mass manufacturing of molded parts, spring coiling, and final assembly.

Quantities & timeline

Injection molds for the table body and housing take 8-12 weeks. Springs are custom-wound and can be produced quickly once specs are finalized. Durability testing for automotive-grade cycles (e.g., 10,000+ open/close cycles) typically takes 4-6 weeks. Send us your table dimensions, target load capacity, material preferences, quantity and target price and we will reply with options.

Patent drawings

Chair Back Table with One-Way Locking Mechanism for Adjustable Seats - Patent Fig. 1
Fig. 1 - Overall structure of the adjustable seat with the table deployed.
Chair Back Table with One-Way Locking Mechanism for Adjustable Seats - Patent Fig. 2
Fig. 2 - Side view of the chair back table mechanism.
Chair Back Table with One-Way Locking Mechanism for Adjustable Seats - Patent Fig. 3
Fig. 3 - Exploded view of the table and locking components.
Chair Back Table with One-Way Locking Mechanism for Adjustable Seats - Patent Fig. 4
Fig. 4 - Detail of the locking mechanism and spring arrangement.
Chair Back Table with One-Way Locking Mechanism for Adjustable Seats - Patent Fig. 5
Fig. 5 - Cross-section showing the internal mounting in the chair back.
Chair Back Table with One-Way Locking Mechanism for Adjustable Seats - Patent Fig. 6
Fig. 6 - Diagram illustrating the torsion spring and shaft connection.

Drawings reproduced from the public patent document for reference.

🔥 Popularity – views

Bring this product to market

  1. ✓ Patent vetted China-only family and legal status checked
  2. 2 Product brief · now How it works, uses and options written up
  3. 3 Prototype First samples for buyers to review
  4. 4 Pilot run Small first batch for launch customers
  5. 5 Volume production Repeat orders at scale

Buyer interest

– of 100 buyers needed to start prototyping

or request a quote Share to speed it up:

One click, no sign-up. Each vote is one real visitor, and products with the most interest go to prototyping first.

Build team: no members yet. Need a partner, co-funding or skills to build this? Join and we introduce the team once it forms.

Join the build team

Want to develop this product with others? Tell us what you can bring. When the team has enough people, we introduce the members to each other by email.

I can help with (pick any)

Letters only. The team list on this page shows your country and the first 5 letters of your name (e.g. "Micha**"); leave the name blank to appear as "Anonymous".

No money is collected on this site. IP2M does not hold or manage funds, and pledges are non-binding. We email you a link to confirm; only confirmed members are introduced to each other. See our privacy policy.

Interested in building this?

Tell us your target market, quantity and timeline. We reply with options for prototyping, small-batch runs or volume production.

More product-ready patents

All Car Accessories patents →
Car Headrest Pillow with Ratchet Side Wings and Push-Button Reach - patent drawing

Car Accessories

Car Headrest Pillow with Ratchet Side Wings and Push-Button Reach

Post-mounted car headrest pillow with ratchet side wings and a push-button forward adjustment.

Patent CN212195197U

Hard-Shell Rooftop Tent That Doubles as a Cargo Box - patent drawing

Car Accessories

Hard-Shell Rooftop Tent That Doubles as a Cargo Box

Roof box whose hard frames lift on gas struts into a tent with door and skylight, and fold back for luggage.

Patent CN206327275U

Headlamp-to-Bumper Adapter Bracket That Sets Gap and Flush in Three Directions - patent drawing

Car Accessories

Headlamp-to-Bumper Adapter Bracket That Sets Gap and Flush in Three Directions

Molded bracket under the headlamp: support blocks and snap teeth locate the bumper flange for an even gap.

Patent CN216580316U

This page is based on the public patent document CN116039479B, assigned to Ningbo Shuaitelung Automotive Systems 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.