Patent ID: 6883794

Claim:
An adjustable positioning device for positioning a work piece on a work platform, the adjustable positioning device comprising: a base having a plurality of sockets, the base being disposed on the work platform; a supporting frame, comprising: a supporting portion protruded from a lateral side of the supporting frame; a plurality of bars protruded from the bottom of the supporting frame, the bars inserted into the sockets for coupling the supporting frame onto the base, the relative position between the supporting frame and the base is adjustable according to a width of the work piece; and a slot penetrating the supporting frame and extending along a sliding-down direction with one end of the slot closer to the supporting portion being lower than the other end of the slot; and a slide block comprising a sliding section, a fixing mechanism, and a pressing section, wherein the sliding section is slidably received in the slot, and the fixing mechanism capable of selectively fixing the sliding section onto the supporting frame; wherein due to the weight of the slide block, the sliding section is able to slide along the sliding-down direction, to make the pressing section moving towards the supporting portion, so that the work piece is retained by the pressing section and the supporting portion.