| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Overall dimensions | 520 x 610 x 950 mm | |
|---|---|---|
| Finished Seat Cushion Thickness | 90 mm | |
| Backrest Padding Thickness | 70 mm | |
| Lumbar Support Zone Height | 240 mm | |
| Clear Width Between Armrests | 540 mm |
Net weight / load capacity / users / durability
| Net weight | 12 kg | |
|---|---|---|
| Maximum static user load | 80 kg | |
| Seat height adjustment positions | 8 | |
| Backrest height adjustment travel | 250 mm | |
| Seat height adjustment travel | 220 mm | |
| Recommended user age range | 14 years | |
| Seat foam density | 35 kg/m³ | |
| Caster rolling durability cycles | 30000 | |
| Seat Foam Density / Rebound Reference | 45 kg/m³ / 65% | |
| Back Foam Density Reference | 38 kg/m³ |
Core acceptance fields · Panels / hardware / frame / upholstery
| Seat cushion upholstery | Breathable faux leather or fabric cover | |
|---|---|---|
| Seat cushion core | High-resilience polyurethane foam | |
| Backrest upholstery | Coordinated padded fabric/faux leather cover | |
| Backrest core | Molded contoured foam with rigid inner support | |
| Support column and adjustment housing | Injection-molded engineering PP plastic | |
| Five-star base | Reinforced nylon or powder-coated steel | |
| Casters | PU-wheeled swivel casters with brake | |
| Adjustment hardware | Zinc-plated steel locking pins and axles | |
| Backrest tilt pivot | Steel shaft with plastic friction bushing | |
| 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 |
Adjustment / rotation / tilt / mobility / storage features
| Seat height adjustment | Knob/pin locked incremental height setting across 220mm travel | |
|---|---|---|
| Caster mobility | 360-degree swivel rolling with gravity-activated brake for safety | |
| Backrest dynamic support | Pivoting tilt to follow seated posture movement | |
| Seat base adjustment dial | Rotary control at front of seat pan for seat height or tilt lock | |
| 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 |
Verified carton / gross weight / assembly / loading data
| 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 |
Recommended spaces / users / usage modes
| Children's home study space | Paired with height-adjustable study desk for homework, reading, and drawing use | |
|---|---|---|
| Private tutoring center classroom | Adjustable sizing to fit multiple age groups of students across grade levels | |
| Children's bedroom multi-use area | Suitable for craft activities and screen time at desk in residential settings | |
| Recommended matching furniture | 1200 mm wide height-adjustable children's study desk for coordinated ergonomic setup | |
| Surface finish recommendation | Available in pink, blue, green color options to match different room decor schemes | |
| Recommended Matching Desk Size | 2.4 m executive desk | |
| Reference Daily Use Duration | 8 hours/day; confirm by ergonomic testing |
EU Market Access Requirements* EN Standards
| EN 1729-1:2015 | Furniture for educational institutions chairs, applicable for structural strength testing | |
|---|---|---|
| EN 71-3:2019 | Toy safety migration of elements, applicable for non-toxic material requirements |
Standards applicable to China-market projects
| GB 28007-2011 | General technical requirements for children's furniture, applicable for safety compliance | |
|---|---|---|
| GB/T 3976-2014 | Functional dimensions and test methods for school chairs, applicable for height fit | |
| GB 18584-2001 | Indoor decoration material limit of harmful substances for wooden furniture, applicable for material safety |
This product must meet the following technical requirements: 1. GB 28007-2011: General technical requirements for children's furniture, applicable for safety compliance; 2. GB/T 3976-2014: Functional dimensions and test methods for school chairs, applicable for height fit; 3. GB 18584-2001: Indoor decoration material limit of harmful substances for wooden furniture, applicable for material safety; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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