1212C

Dimensions:

Aluminum alloy writing board size and technical requirements:

1. The casting process must not have large pores, looseness, slag inclusions and other undesirable phenomena.

2. There should be no burrs or flash around the foot after it is formed.

3. Surface sandblasting.

Aluminum alloy foot size and technical requirements:

1. Net weight of aluminum alloy handrail frame ≥3.6KG.

2. The casting process must not have large pores, looseness, slag inclusions and other undesirable phenomena.

3. There should be no burrs or flash around the foot after it is formed.

4. Surface sandblasting treatment.

2. Technical requirements

1. The seat is designed and manufactured according to the principles of ergonomics and morphological aesthetics. The curvature of the seat and back cushions fully conforms to the curve of the human body. The armrests and feet are made of aluminum alloy and die-cast. The seat height and seat depth are reasonable and comfortable to sit on. The seat cushion can automatically return to its original position. The seat appearance is simple and beautiful.

2. The basic center distance of the seat is 565±10mm, the side depth of the seat when opened is 685±10mm, the seat depth is 440±10mm, and the basic chair height is 1000±10mm.

3. Under the premise of ensuring the comfort of the audience, the back cushion height shall not exceed 1000mm to increase the sound reflection area of ​​the chair backboard and improve the sound absorption of the seat; sound-absorbing holes shall be made in the seat bottom plate as needed to keep the sound absorption of the seat as consistent as possible at different occupancy rates.

4. Hidden writing board: The aluminum head and support plate of the writing board are made of high-quality aluminum alloy material through die-casting. The writing board panel is made of ABS composite material through mold injection molding. The writing board is fixed by mechanical high-strength bolts, so that the connection parts of the writing board become stronger and stronger with use, and there will be no loosening. Dimensions: length 381±10mm, width 261±10mm, thickness 45±10mm. The writing board must have a silencer when it is opened and recycled, and there must be no rebound force and noise.

5. The fabric is made of high-grade linen and velvet, and has been treated with anti-static and anti-moth treatment. It feels comfortable and will not wrinkle, break, pilling or fade after long-term use.

6. The seat foam is a polyurethane cold foam high-resilience shaping sponge with high strength and good resilience. The unique formula makes the foam antibacterial and can effectively kill bacteria such as E. coli. Seat sponge size: length 450±10mm, width 488±10mm, height 40±10mm, sponge density 50~55KG/M3, back sponge size: length 780±10mm, width 507±10mm, height 85±10mm, sponge density 45-50KG/M3.

7. Seat armrest cover: Made of high-quality imported oak solid wood, curved shape, no deformation, no cracking. The surface of exposed wooden parts is sprayed with environmentally friendly polyester paint, and the content of harmful substances meets the green environmental protection standards. Dimensions: length 355±10mm, width 72±10mm, thickness 20±10mm.

8. The seat and back shells are made of high-quality PP (polypropylene) + fiber composite material injection molding. The appearance is arc-shaped, beautiful and elegant, non-fading and anti-deformation, with curvaceous beauty. Back shell size: Back shell size: length 780±10mm, width 507±10mm, thickness 4.0mm. Seat shell size: length 450±10mm, width 488±10mm, thickness 4.0mm.

9. The seat cushion automatically returns to its original position with precision, ensuring that it is parallel to the armrest and that the product is beautiful. The return mechanism adopts a double torsion spring and gas rod damping slow return mechanism. The two-stage buffering is fast at first and then slow, so that the seat can return to its position within 3 seconds. It has escape and silencer functions. Rubber pads are added to the collision part of the seat to prevent collision and reduce noise, so that the seat can be opened without noise and returns slowly without impact.

10. Aluminum alloy footrest: Made of high-quality aluminum alloy material, the aluminum alloy handrail width ≥50mm, weight ≥3.6KG. The polished surface of the handrail adopts a curved surface design to ensure the full beauty of the product. Dimensions: length 675±2mm, width 422±2mm, height 90±2mm.

11. The side panels are made of high-quality ABS plastic through one-piece injection molding, with dimensions of 600±2mm in length and 385±2mm in width.

12. The seat is fixed to the ground with hidden pressure-explosive screws, and the appearance is specially designed with a plastic dust cover to ensure that the chair legs are smooth and beautiful while preventing dust accumulation and facilitating cleaning.

13. It is required to provide one set of single-seat complete chair samples; provide one small sample of armrest and footrest accessories. The width of the aluminum alloy armrest should be ≥50mm and the weight should be ≥3.6KG. The armrest should be tilted upward at 6.5 degrees to ensure comfortable and natural writing. No points will be awarded if the samples are not provided as required or the samples provided do not meet the requirements.