Name: Ergonomic Height-Adjustable Children's Study Chair
Brand: Smart Learning Desk
SKU: WWL6UC

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PRODUCT MODULE 01 / 06

Physical Dimensions

Automatic mm / inch conversion · Core engineering specifications

Data source: Structured from factory data; final measured values prevail.

Overall dimensions (W × D × H)	580 × 620 × 820 mm
Seat cushion dimensions	450 x 420 mm
Maximum seat height (from floor)	550 mm
Minimum seat height (from floor)	340 mm
Maximum backrest height (from floor)	920 mm
Minimum backrest height (from floor)	730 mm
Maximum seat depth adjustment travel	80 mm
Five-star base diameter	600 mm
Single backrest pad dimensions	180 x 320 mm
Seat cushion edge thickness	60 mm
Caster diameter	50 mm
Finished Seat Cushion Thickness	90 mm
Backrest Padding Thickness	70 mm
Lumbar Support Zone Height	240 mm
Clear Width Between Armrests	540 mm

PRODUCT MODULE 02 / 06

Weight, Load & Performance

Net weight / load capacity / users / durability

Data source: Product performance data; verify exact test conditions before procurement.

Net weight	18 kg
Maximum static load capacity	150 kg
Suitable child height range	1650 mm
Suitable user age range	14 years
Foam padding density	45 kg/m³
Foam rebound rate	60%
Lift mechanism cycle durability	100000 cycles
Upholstery abrasion resistance	30000 cycles
Seat Foam Density / Rebound Reference	45 kg/m³ / 65%
Back Foam Density Reference	38 kg/m³

PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Data source: Subject to the factory material list and inspection report.

Seat and backrest upholstery	Breathable knitted fabric
Seat and backrest padding	High-density resilient polyurethane foam
Five-star base and foot platform	Reinforced polypropylene plastic
Central lift column	Powder-coated steel tube
Internal support frame	1.5mm thick steel tube
Caster wheels	Polyurethane tread with PP housing
Adjustment control knobs	Color-matched ABS plastic
Fabric surface treatment	Stain-repellent easy-clean finish
Seat Internal Support Board Thickness	14 mm bent plywood or equivalent support board
Backrest Internal Frame Thickness	14 mm bent plywood/composite reinforced frame
Gas-lift Engineering Specification	Recommended Class 4; outer tube 50 mm; stroke 100 mm
Tilt Mechanism Plate Thickness	2.5 mm cold-rolled steel

PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Data source: Functional configuration; the supplier specification prevails.

Seat height adjustment	Gas-assisted stepless lift with 210mm travel, locks at desired height
Seat depth adjustment	Forward/back slide with 80mm travel, matches growing child thigh length
Caster locking	Gravity-activated sit-brake casters lock automatically under ≥20kg seated load
Split back support	Dual independent wing pads conform to spinal curve, provide lateral posture support
Base foot platform	Integrated anti-tip footrest ring provides stable foot support for smaller children
360-degree swivel	Full rotation around central column for easy desk access
Recline Angle / Lock Reference	125° with 3suggested lock positions
Tilt Tension User-weight Range	Reference adjustment coverage 120 kg
Rotation / Mobility Configuration	360° swivel with 5-caster multidirectional movement

PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Data source: Reference for export quotations and container planning.

Reference Package Count	1 set / 2 cartons
Reference Assembly Time	40 minutes per set
Reference Carton Dimensions	850× 420× 720 mm
Reference Packaged Gross Weight	23 kg/set
Reference Carton Volume	0.26 m³/set
Indicative 20GP Loading	135 sets at 85% space utilization
Indicative 40HQ Loading	320 sets at 85% space utilization

PRODUCT MODULE 06 / 06

Applications & Usage

Recommended spaces / users / usage modes

Data source: Recommended applications based on product form and category.

Home study space	Pairs with height-adjustable children's desks for daily homework and reading use
Classroom and training environments	Suitable for primary school and after-school program seating
Growing child use case	Adjusts to fit children 14 years old, supporting 165 cm height range
Posture support use	Dual split backrest promotes healthy seated posture to reduce spinal strain
High-activity household use	Sit-brake casters prevent unwanted movement when child is seated
Recommended Matching Desk Size	2.4 m executive desk
Reference Daily Use Duration	8 hours/day; confirm by ergonomic testing

STANDARD S1

EU Market Entry Requirements * EN Standards

EU Market Access Requirements* EN Standards

EN 17191:2021	Applicable safety standard for children's seating products for domestic use
EN 12520:2015	Applicable strength, durability and safety standard for domestic seating

STANDARD S3

Standards Applicable to China-Market Projects * GB Standards

Standards applicable to China-market projects

GB 28007-2011	Applicable safety standard for children's furniture used in home and school environments
GB/T 3324-2017	Applicable general technical requirement standard for wooden and metal furniture

Standardized tender description text

This product must meet the following technical requirements:
1. GB 28007-2011: Applicable safety standard for children's furniture used in home and school environments;
2. GB/T 3324-2017: Applicable general technical requirement standard for wooden and metal furniture;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

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Product Description

The Ergonomic Height-Adjustable Children's Study Chair from Smart Learning Desk, model KSC-SB5862is purpose-built to support long study sessions for growing users, with a streamlined armless, mobile design that balances support and flexibility. Its visual profile is defined by a split dual-wing backrest, smooth contoured seat, and five-star caster base, with understated cohesive finishes that complement both residential and institutional learning spaces. The compact footprint measures 580 x 620 x 820 mm at the lowest seat setting, with a 600 mm diameter five-star base that delivers stable positioning without cluttering floor space.
Construction prioritizes durable, child-friendly materials: seat and backrest surfaces use breathable knitted fabric treated with a stain-repellent, easy-clean finish, padded with 45 kg/m³ high-density resilient polyurethane foam that delivers a 60% rebound rate for sustained comfort. The internal support structure relies on a 1.5 mm thick steel tube frame paired with a 14 mm bent plywood internal seat support board, while the central lift column uses powder-coated steel tube, the five-star base and integrated anti-tip foot platform are reinforced polypropylene, casters feature polyurethane tread with polypropylene housing, and adjustment controls use color-matched ABS plastic. The chair weighs 18 kg net, with a 150 kg maximum static load capacity.
Core functional features adapt to users across growth stages: gas-assisted stepless seat height adjustment delivers 210 mm of travel, locking at any desired position, while 80 mm of forward and back seat depth travel adjusts to match growing children’s thigh length. The split backrest uses dual independent wing pads that conform to the natural spinal curve to provide lateral posture support, with a 125° recline range and three suggested lock positions for varied task positioning. Gravity-activated sit-brake casters lock automatically under 20 kg or more of seated load to prevent unwanted movement, while 360-degree swivel enables easy access to all areas of a paired desk. The integrated anti-tip footrest ring provides stable foot support for smaller children, and the lift mechanism is tested for 100000 adjustment cycles for long-term use.
This chair suits home study spaces paired with height-adjustable children’s desks for daily homework and reading, as well as primary school classrooms and after-school training program environments, accommodating users up to 14 years of age and 165 cm in height, and pairing seamlessly with desks up to 2.4 m in width. For procurement, note that each unit ships in two cartons with a 23 kg packaged gross weight and 0.26 m³ carton volume, requires 40 minutes of assembly per set, and fits 135 sets per 20GP container at 85% space utilization.

Ergonomic Height-Adjustable Children's Study Chair Specifications

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