Patent ID: 8845014
Filing Date: 2014-09-30
Classification: A47C

Abstract:
1. A mechanical stretching device for a multifunctional convertible sofa, comprising a first foot lever, a second foot lever, a third foot lever, a fourth foot lever, a side plate, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a first support member, a second support member, a linkage member, a connecting member, a rotating shaft transmission member, a spring, and a bottom connecting rod; wherein one end of the sixth connecting rod is rotatably connected to the fourth foot lever, the other end of the sixth connecting rod is rotatably connected to the rotating shaft transmission member; the fourth foot lever is rotatably connected to the side plate, the fifth connecting rod, and the second foot lever respectively; the third foot lever is rotatably connected to the side plate, the first foot lever, and the second foot lever respectively; the second support member is rotatably connected to the bottom connecting rod and the fourth connecting rod respectively; the fourth connecting rod is rotatably connected to the second connecting rod and the linkage member respectively; the second connecting rod is rotatably connected to the side plate; the third connecting rod is rotatably connected to the second support member and the connecting member respectively; the connecting member is rotatably connected to the side plate and the fifth connecting rod respectively; the linkage member is rotatably connected to the side plate, the first connecting rod, and the first support member respectively; the first support member is rotatably connected to the bottom connecting rod; and one end of the spring is fixed on the side plate, and the other end of the spring is fixed on the sixth connecting rod.