Patent ID: 6193264
Filing Date: 2001-02-27
Classification: B62B

Abstract:
A collapsible frame device comprises:an outer pipe, an inner pipe inserted in the outer pipe, a lower joint disposed on a middle portion of the outer pipe, two support frames connected to the lower joint, each of the support frames connected to a wheel connector, the wheel connector connected to a wheel, and two pull rods,a rope connected to the support frames,a handle disposed on a top end of the inner pipe,a releasing device disposed on the outer pipe,the outer pipe having a lateral plate and two L-shaped plates,the L-shaped plates located at a lower portion of the outer pipe,a spacing formed between the L-shaped plates,a slide block disposed on the outer pipe to be slide along the spacing,the slide block having two guide grooves engaging with the L-shaped plates,a recess hole formed on a top portion of the slide block,two pivot couplers disposed on the slide block,each of the pivot couplers having a notch receiving an end of the respective pull rod,each of the pull rods connected to the respective pivot coupler and the respective support frame,a plug block inserted in a lower end of the inner pipe,the plug block having a through hole,a driven rod having a first bent end inserted in the recess hole of the slide block and a second bent end inserted through the through hole of the plug block,the inner pipe having an oblong hole and a positioning aperture,a positioning block disposed in the inner pipe,the positioning block having a main seat, a positioning pin device, a first coiled spring, a blocking pin device, a second coiled spring, an upper cover, and a rectangular plate,the main seat having a transverse opening, a transverse hole communicating with the transverse opening, a longitudinal opening, and a longitudinal hole communicating with the longitudinal opening and the transverse opening,the first coiled spring surrounding a portion of the positioning pin device,the positioning pin device having a shank inserted in the transverse hole and an annular flange inserted in the transverse opening,the second coiled spring surrounding a portion of the blocking pin device,the blocking pin device having a blocking rod inserted in the longitudinal hole and a solid cylinder inserted in the longitudinal opening,the solid cylinder having two round apertures,the upper cover covering a top portion of the main seat,the rectangular plate disposed on the main seat, the rectangular plate facing the oblong hole of the inner pipe,the outer pipe further having a blocking bar, two retainer grooves, and a positioning hole,a hollow casing disposed in a top end of the outer pipe to receive the inner pipe,the hollow casing having two elastic bars,each of the elastic bars inserted in the respective retainer groove,the releasing device having a main mount, the main mount having a hollow interior, and a button disposed in the hollow interior of the main mount,the button having a pressing head protruding outward the main mount, a hollow cylinder, and a center post inserted in a third coiled spring,the center post matching the positioning hole of the outer pipe,when the shank of the positioning pin device enters the positioning hole of the outer pipe, the inner pipe will not be moved, and the blocking rod contacts the annular flange of the positioning pin device,when the pressing head is pressed inward, the center post forces the shank of the positioning pin device disengages from the positioning hole, and the blocking rod blocks the annular flange of the positioning pin device so that the inner pipe will be pulled out of the outer pipe.