| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Overall dimensions | 610 x 590 x 950 mm | |
|---|---|---|
| Maximum seat height | 540 mm | |
| Minimum seat height | 340 mm | |
| Backrest height | 420 mm | |
| Seat width | 460 mm | |
| Seat depth maximum | 430 mm | |
| Seat depth minimum | 370 mm | |
| 5-star base diameter | 580 mm | |
| Caster diameter | 50 mm | |
| Backrest maximum vertical height from seat | 390 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 product weight | 16.5 kg | |
|---|---|---|
| Recommended maximum user weight | 100 kg | |
| Recommended user age range | 12 years | |
| Seat foam density | 45 kg/m³ | |
| Seat foam rebound rate | 55% | |
| Cushion static load capacity | 150 kg | |
| Seam stitch pitch | 8 stitches per 30mm | |
| Warranty period for core components | 3 years | |
| 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 padding | 45kg/m³ high-density molded foam | |
|---|---|---|
| Backrest padding | 40kg/m³ contoured supportive foam | |
| Upholstery fabric | Breathable 3D mesh or knitted fabric, 0.8mm thickness | |
| Central support column | 1.5mm thick cold-rolled steel with powder-coated finish | |
| 5-star base | Glass-fiber reinforced nylon with matte gray finish | |
| Caster wheels | 50mm PU soft tread casters with polypropylene housing | |
| Adjustment knobs | ABS engineering plastic with textured grip surface | |
| Footrest platform on base | ABS plastic with non-slip textured surface | |
| Height adjustment gas lift | Class 3 steel gas lift with 200mm stroke | |
| Upholstery abrasion resistance | 30000 Martindale cycles | |
| Seat Internal Support Board Thickness | 14 mm bent plywood or equivalent support board | |
| Backrest Internal Frame Thickness | 14 mm bent plywood/composite reinforced frame |
Adjustment / rotation / tilt / mobility / storage features
| Seat height adjustment | 200mm vertical stroke via indexed locking positions | |
|---|---|---|
| Seat depth adjustment | 60mm forward/backward travel via side rotary knob | |
| 360-degree swivel function | Full rotation around central column for easy positioning | |
| Gravity-locking casters | Lock automatically when 15kg seated load is applied | |
| Backrest tilt lock | 3-degree fixed tilt angle for upright seated posture | |
| Backpack hook | Integrated top rear hook for hanging school bags | |
| 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
| Home study area | For children aged 12to use with height-adjustable study desks during homework | |
|---|---|---|
| Primary school classroom | Suitable for classroom seating with adjustable height to fit growing students | |
| Children's tutoring center | Durable mobile seating for one-on-one or group tutoring sessions | |
| Reading corner | Comfortable supportive seating for extended independent reading time | |
| Art and activity space | Swivel and mobile design supports flexible positioning for craft activities | |
| Multi-child households | Multiple color options (blue, pink, green) to match different children's preferences | |
| 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, safety requirements for chairs and tables | |
|---|---|---|
| EN 1729-2:2012 | Furniture for educational institutions, strength and durability test methods | |
| EN 71-3:2019 | Toy safety, migration of certain elements for child-contact materials |
US and Canada office-furniture standards
| ANSI/BIFMA X5.1-2017 | Office chairs standard, reference for structural durability and stability testing | |
|---|---|---|
| ANSI/BIFMA X5.11-2015 | Large occupant office chairs, reference for static load verification | |
| BIFMA G1-2013 | Ergonomic guidelines, reference for child posture support dimensions |
Standards applicable to China-market projects
| GB 28007-2011 | General technical requirements for children's furniture, applicable for safety and edge compliance | |
|---|---|---|
| GB 28481-2012 | Limit of harmful substances for plastic furniture, applicable for plastic component safety | |
| GB/T 3324-2017 | General technical requirements for wooden/metal furniture, applicable for structural stability | |
| GB 6675.1-2014 | Toy safety general requirements, applicable for small part and pinch point checks |
This product must meet the following technical requirements: 1. GB 28007-2011: General technical requirements for children's furniture, applicable for safety and edge compliance; 2. GB 28481-2012: Limit of harmful substances for plastic furniture, applicable for plastic component safety; 3. GB/T 3324-2017: General technical requirements for wooden/metal furniture, applicable for structural stability; 4. GB 6675.1-2014: Toy safety general requirements, applicable for small part and pinch point checks; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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