Chair frame assembly

Abstract

A chair frame assembly includes a frame, a plurality of mounting blocks, and a plurality of wheel devices. The frame includes a plurality of legs each having a coupling hole extending along a first longitudinal axis at a first acute angle to a vertical axis. Each coupling block includes an upper, insertion section having an engaging hole extending along a second longitudinal axis and a lower, coupling section extending along an axial axis at a second acute angle to the second longitudinal axis the same as the first acute angle. The insertion section of each coupling block is engaged in the coupling hole of one of the legs with the first longitudinal axis coincident with the axial axis and with the second longitudinal axis perpendicular to the ground. Each wheel device includes a wheel and an axle coupled in the engaging hole.

1 . A chair frame assembly comprising:
 a frame including a mounting section and a plurality of legs extending downward and outward from the mounting section, with each of the plurality of legs including a coupling hole in a lower end thereof and extending along a first longitudinal axis at a first acute angle to a vertical axis perpendicular to a ground, with the lower end of each of the plurality of legs further including a notch extending upward from a bottom edge thereof along the first longitudinal axis;   a plurality of coupling blocks each including an upper, insertion section and a lower, coupling section, with the coupling section including an engaging hole extending along a second longitudinal axis, with the insertion section extending along an axial axis at a second acute angle to the second longitudinal axis of the engaging hole, with the second acute angle being equal to the first acute angle, with the insertion section further including a tab, with the insertion section of each of the plurality of coupling blocks being engaged in the coupling hole of one of the plurality of legs with the first longitudinal axis coincident with the axial axis, with the tab engaged in the notch, and with the second longitudinal axis perpendicular to the ground; and   a plurality of wheel devices each including a wheel and an axle above the wheel, with the axle of each of the plurality of wheel devices being coupled in the engaging hole of one of the plurality of coupling blocks, with the axle being perpendicular to the ground when the wheel is located on the ground.   
   
   
       2 . The chair frame assembly as claimed in  claim 1 , with the insertion section including a column in a center thereof and having a plurality of ribs on an outer periphery thereof, with the column extending along the axial axis, with the insertion section further including an annular wall surrounding the column and spaced from the column by an annular groove, with the tab extending inward from an inner periphery of the annular wall in a radial direction perpendicular to the axial axis, with the plurality of ribs of the column being securely engaged with an inner periphery of the coupling hole of one of the plurality of legs by tight coupling, and with the lower end of each of the plurality of legs engaged in the annular groove of one of the plurality of coupling blocks.