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Patent Information & Production OptionsCollapsible Student Desk and Chair with Arm Rests · Patent CN113615980B

Patent CN113615980B: 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 numberCN113615980B (application CN202110894747)
TypeChina invention patent (发明专利) - protects product method and structure
Original titleCollapsible Table and Chair for Students (一种学生用折合式桌椅)
Patent ownerJiangxi Smart Star Industry Co ltd
InventorsTao Huan
Filing date2021-08-05
Grant date2022-06-07
Status (China)In force - valid until at most 2041-08-05, 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 CN113615980B)

What the claims cover, in plain language

Claim 1 defines a student collapsible table and chair comprising a first supporter (1), first fixing rod (2), protection frame (21), placing box (3), first fixers (4), table plate (5), seat mechanism (6), arm support mechanism (7), folding lifting mechanism (8), and placement mechanism (9). The key structural relationships are:

  • The seat mechanism (6) is positioned between the fixing rod (2) and protection frame (21), utilizing first torsion springs (65) wound on first fixing shafts (61) and first springs (64) acting on clamping rods (63).
  • The arm support mechanism (7) connects the seat to the rod via first rotating shafts (71) and first pull ropes (73) coupled with second torsion springs (74).
  • The folding lifting mechanism (8) uses connecting blocks (84) and sliding lifters (83) to coordinate the vertical movement of the arms relative to the table plate (5).
  • The placement mechanism (9) features a foot placing frame (91) connected to a lower pressing frame (93) via a lower pressing rod (95) and a second spring (94).

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 design in China requires the owner’s permission. However, since there are no US patents in this family, the design itself is not restricted by this specific patent number in the United States.

Two points to settle early:

  • Other patents may exist. Educational furniture and folding mechanisms are a crowded field with many existing US patents regarding self-storing desks, flip-down seats, and modular classroom systems. A freedom-to-operate (FTO) review is essential before tooling to ensure no other US utility patents cover the specific combination of synchronized arm/seat folding or the spring-loaded footrest mechanism.
  • Safety Standards Compliance. US market entry requires strict adherence to federal and state safety regulations for children’s products, which may influence material choices and structural tolerances beyond what is described in the patent.

Customization and manufacturing

What can be customized

AreaOptions
MaterialsSteel types (cold-rolled vs. aluminum) for frame; plastic vs. wood laminate for table plate.
Spring SpecificationsTorque rating of torsion springs and tension of pull ropes to adjust folding effort.
DimensionsHeight adjustments for primary vs. secondary school age groups; width of table plate.
Storage FeaturesSize and configuration of the placing box (3); addition of hooks or shelves.
FinishesPowder coating colors, anti-microbial coatings for surfaces, edge banding styles.

Things to plan for (US market)

  • ASTM F1235 - Standard Consumer Safety Specification for Portable Tables for Children. While this is a fixed unit, similar durability and tip-over logic applies.
  • ANSI/BIFMA X5.1 - General Purpose Office Chairs Tests. If marketed as general seating, cycle testing for the folding mechanism is critical.
  • CPSC Guidelines - Sharp edges, pinch points, and entanglement hazards must be minimized, especially for younger students.
  • California Prop 65 - Screening of finishes and plastics for lead, cadmium, and phthalates.

How a project runs

  1. Inquiry - Define target age group, dimensions, and volume requirements.
  2. Design Adaptation - Engineer the spring rates and linkage geometry for US safety standards.
  3. Prototype - Build functional models to test folding cycles and load-bearing stability.
  4. Pilot Run - Conduct third-party lab testing for durability and chemical safety.
  5. Production - Metal stamping/welding, powder coating, injection molding for plastic parts, final assembly.

Quantities & timeline

Manufacturing involves precision welding of the central rod assembly, custom winding of torsion springs, and careful assembly of the rope-and-pulley-like linkage. Tooling for the table plate and protective frames requires molds. Testing cycles for the folding mechanism typically take several weeks to validate longevity. Send us your target dimensions, material preferences, quantity estimates, and desired certification level and we will reply with options.

Patent drawings

Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 1
Fig. 1 - Overall structure of the collapsible table and chair.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 2
Fig. 2 - Front view of the assembled unit.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 3
Fig. 3 - Side view showing the seat mechanism.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 4
Fig. 4 - Top view of the table plate and fixing rod.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 5
Fig. 5 - Detailed view of the arm support mechanism.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 6
Fig. 6 - Structure of the folding lifting mechanism.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 7
Fig. 7 - Connection of the pull ropes and shafts.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 8
Fig. 8 - View of the placement (footrest) mechanism.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 9
Fig. 9 - Internal spring arrangement of the seat.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 10
Fig. 10 - Exploded view of the central fixing rod assembly.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 11
Fig. 11 - Detail of the clamping rods and guides.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 12
Fig. 12 - Position of the protection frame.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 13
Fig. 13 - Mechanism of the placing box attachment.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 14
Fig. 14 - Kinematic diagram of the folding action.
Collapsible Student Desk and Chair with Arm Rests - Patent Fig. 15
Fig. 15 - Alternative embodiment details.

Drawings reproduced from the public patent document for reference.

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This page is based on the public patent document CN113615980B, assigned to Jiangxi Smart Star Industry 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.