Heavy-Duty Spring-Assisted Sofa Bed Lift Mechanism & Storage Hinges

产品描述

The heavy-duty spring-assisted sofa bed lift mechanism manufactured by Zhaoqing Gaoyao Jinli Zhengkai Hardware Factory (BLS Hardware) is engineered for convertible sleeper couches, ottoman storage beds, and multi-functional furniture plinths. Precision-stamped from 2.5mm and 3.0mm thickened Q235 cold-rolled carbon steel plate and paired with dual 65Mn oil-tempered helical extension springs, it delivers smooth, finger-light counterbalance elevation up to an 80-degree opening angle while supporting distributed loads up to 150 kg per pair. Every mechanism undergoes rigorous factory fatigue testing exceeding 25,000 continuous articulation cycles in accordance with EN 12520 commercial furniture standards. The surface features an automotive-grade cathodic electrophoretic matte black finish tested to 48 hours of ASTM B117 neutral salt spray to ensure complete corrosion resistance during maritime shipping. We provide full OEM and ODM customization, supporting custom linkage arm lengths, specialized mounting hole centers, and tailored spring wire tensions. Standard packaging: 1 pair per protective PE sleeve, 15 pairs per 5-ply reinforced export master carton, palletized to ISPM-15 standards. Production lead time is 20–25 days (stock evaluation samples dispatch within 3–5 days). 100% of sample evaluation fees are fully deductible against your first bulk production order.