Foldable chair frame
OwnerChun-Hsien Tsenginventor
Life of this patent
Estimating the term…
Abstract
A foldable chair frame includes pivotally connected front and rear legs. The front leg has a tubular upper end portion which confines an axial insert hole and which is formed with a radial positioning hole. An extension rod has a lower end portion extending axially into the upper end portion of the front leg, and is provided with a resilient positioning protrusion which projects radially into the positioning hole for positioning the extension rod on the front leg. A seat frame has a rear part pivoted to the upper end portion of the extension rod, and a front part pivoted to the upper end portion of the rear leg. The positioning protrusion is depressible for disengaging from the positioning hole to permit retraction of the extension rod into the front leg, thereby permitting folding of the front and rear legs toward the seat frame.
Claims8
A foldable chair frame comprising:
- a front leg having a lower end portion adapted to be supported on a ground surface, a tubular upper end portion which extends upwardly and rearwardly from said lower end portion and which confines an axial insert hole with a top opening, and an intermediate portion between said lower end portion and said tubular upper end portion, said upper end portion being formed with at least one radial positioning hole;
- a rear leg having a lower end portion adapted to be supported on the ground surface, an upper end portion which extends upwardly and forwardly from said lower end portion of said rear leg, and an intermediate portion connected pivotally to said intermediate portion of said front leg;
- an adjustable extension rod having a lower end portion extending into said axial insert hole in said upper end portion of said front leg via said top opening, and an upper end portion, said lower end portion of said extension rod being provided with a resilient positioning protrusion which projects radially into said positioning hole for engaging said positioning hole so as to position said lower end portion of said extension rod on said upper end portion of said front leg;
- and
- a seat frame disposed above said front and rear legs and said extension rod, and having a rear part connected pivotally to said upper end portion of said extension rod, and a front part connected pivotally to said upper end portion of said rear leg;
- said positioning protrusion being depressible for disengaging from said positioning hole to permit sliding movement of said extension rod relative to said front leg, thereby permitting said extension rod to retract into said upper end portion of said front leg, and thereby permitting folding of said front and rear legs toward said seat frame.
Dependencies are inferred from the claim text.