Screw direct-pushing type hardness adjusting device, as well as chair and mattress provided with same

• Main Author: LUO ZHIBAO
• Format: Patent
• Language: Chinese; English
• Published: 30.08.2019
• Subjects: BEDS; CHAIRS; COFFEE MILLS; DOMESTIC ARTICLES OR APPLIANCES; FURNITURE; HUMAN NECESSITIES; SOFAS; SPICE MILLS; SUCTION CLEANERS IN GENERAL

The invention relates to a screw direct-pushing type hardness adjusting device. The screw direct-pushing type hardness adjusting device comprises a soft bag, elastic parts, a movable plate, a screw rod and a fixed plate, wherein the soft bag covers the surface, the fixed plate is fixedly arranged re...