The invention relates to a handcart composed of a main frame, four wheel sets properly assembled under the main frame, a grip, two positioning sleeves, and two joint assemblies installed between the main frame and the grip for changeably connecting the main frame with the grip. The grip can be aligned flat or become 90° to the main frame by means of the joint assemblies. Then the handcart can be transformed as a two-wheel handcart or a four-wheel one by handling the grip through movement of the pivotal connecting bases of the joint assemblies and combining the grip with the positioning sleeves movably fitted in positioning holes of the grip.
1. A handcart comprising:
a main frame provided with a frame rod that has two ends respectively provided with a positioning member and a positioning hole;
a grip having two ends pivotally assembled with a positioning sleeve which is also pivotally combined with said frame rod of said main frame via two joint assemblies;
said positioning sleeve movably fitting around said each end of said grip and provided with a U-shaped positioning groove at an end;
said two joint assemblies installed between said main frame and said grip, said joint assemblies enabling said grip to become aligned to said main frame or to become vertical to said main frame;
characterized by said joint assemblies respectively consisting of a pivotal connecting block, a left pivotal connecting base and a right pivotal connecting base, said pivotal connecting block having one upper and one lower projection in an intermediate portion, said pivotal connecting bases provided with a vertical groove, said vertical groove formed with a blocking surface at an end and a vertical wall; and
said pivotal connecting block of said joint assembly possibly allows said left pivotal connecting base and said right pivotal connecting base to swing up for nearly 90° with said vertical wall of said vertical groove of said left and said right pivotal connecting base sliding against a semicircular pivotal member of said pivotal connecting block so that said grip and said main frame may be swung up and down accurately and stably with easy handling for aligning or bending said main frame relative to said grip.
2. The handcart as claimed in claim 1 , wherein said projections of said pivotal connecting blocks of said joint assemblies contact with and stop by said blocking surface of said vertical grooves so that the adjustment of said grip and said main frame is more stable and simple.