Patent ID: 9681713
Date: 2017-06-20
CPC Classifications: A45B,Y10T

Claim:
1. A foldable chair comprising: a main stick including a rod body that extends along an axis; a seat unit connected to said rod body; a fold unit including a middle slider member and a leg unit, said middle slider member being movable along said rod body between a lower position and an upper position that is located above the lower position, said leg unit including at least one support leg that includes an upper leg component connected pivotally to said middle slider member, a lower leg component connected pivotally to said upper leg component, and a drive link having opposite ends that are connected respectively to said seat unit and said upper leg component, said seat unit being operable to drive movement of said drive link so as to convert said fold unit between an unfolded state where a free end of said lower leg component is distal from said rod body and said upper leg component, and a folded state where said free end of said lower leg component is proximate to said rod body and said upper leg component, such that when said fold unit is converted from the unfolded state into the folded state, said free end of said lower leg component pivots toward said upper leg component; and a retention unit including at least one locking structure that includes a latch member, a pull cord and a block member, said latch member being connected movably to said upper leg component, said pull cord having a first end portion that is connected to said latch member, and a second end portion that is opposite to said first end portion and that is connected to said middle slider member, said block member being connected co-movably to said lower leg component, and having a pivot axis about which said lower leg component is pivotable relative to said upper leg component, a contact surface that extends around the pivot axis, and an engaging surface that is connected to said contact surface, a distance between said engaging surface and said pivot axis being smaller than that between said contact surface and said pivot axis; wherein, when said middle slider member is at the lower position and said fold unit is in the unfolded state, said latch member abuts against said engaging surface for preventing said lower leg component from pivoting relative to said upper leg component so as to keep said support leg unfolded; and wherein, when said middle slider member is moved to the upper position, said pull cord is configured to be driven to separate said latch member from said engaging surface for permitting said lower leg component to pivot relative to said upper leg component so as to permit conversion of said fold unit from the unfolded state to the folded state.