Patent ID: 7636194

Claim:
A portable screen assembly comprising: a casing having an opening extending in a longitudinal direction in an upper surface thereof; a spring-biased roll rotatably mounted in the casing; a screen wound around said spring-biased roll in a storage position, the screen being pulled out from the opening in use; a top bar secured to one end of the screen and used also as a cover to close the opening of the casing in the storage position of the screen; and an extendable column having one end supported at a center portion of a side face of the casing and holding the pulled out screen in a stretched state, wherein a protection member is fitted on a center portion of a front face of the casing so as to reinforce the casing, and wherein the column comprises a first slide locking mechanism for fastening a second pipe located at an upper stage of the column on a first pipe located on a lower stage, the first slide locking mechanism comprising: a tubular engaging portion disposed on an inner circumferential face at the rear end of the second pipe; and a tubular engaged portion comprising a plurality of through holes formed in the longitudinal direction of the first pipe and being engaged with the tubular engaging portion, and wherein the engagement between the tubular engaging portion and the tubular engaged portion is released by pressing a control portion of an engagement releasing portion that is provided at the front end of the column, and thereby the column can be contracted or extended.