Patent ID: 8147358

Claim:
An adjustable net post assembly used in ball games comprising: an inner sleeve being provided with at least one gap at an upper half thereof, and an elastic positioning member extending from a bottom of the gap and being provided with a positioning protrusion on an inner surface thereof, the upper half of the inner sleeve being further formed with a slot which includes a first positioning portion at one end thereof and a second positioning portion at another end corresponding to the positioning member; an outer sleeve being provided with at least one protrusion on an inner surface thereof and being rotatably mounted on the inner sleeve in such a manner that the protrusion is engaged in the slot of the inner sleeve; a spring biased between the inner sleeve and the outer sleeve in such a manner that the protrusion of the outer sleeve is engaged in the first positioning portion or the second positioning portion the slot of the inner sleeve; an outer pipe with an end fixed to a lower half of the inner sleeve; an inner pipe being axially provided with a plurality of positioning holes and adjustably disposed in the inner sleeve and the outer pipe in such a manner that the positioning protrusion of the positioning member is selectively engaged in the positioning holes; when the protrusion of the outer sleeve is moved to the first positioning portion or the second positioning portion the slot of the inner sleeve by rotating the outer sleeve, the positioning protrusion of the positioning member will be disengaged from or engaged in the positioning hole of the inner pipe, so as to allow the inner pipe to be adjusted by being retracted or extended with respect to the outer pipe.