A collapsible luggage trolley comprising:
- a base having wheels mounted thereon for rollingly supporting said collapsible luggage trolley on ground;
- two substantially parallel side posts extending upward from said base with a handhold mounted between free ends thereof and a middle support member connected between said posts at a middle position thereof, said handhold having a first interior space defined therein, said middle support member having a second interior space defined therein;
- each of said posts comprising a lower tubular section mounted at a lower end thereof on said base, a middle tubular section telescopically received within said lower section, and an upper tubular member telescopically received within said middle section, said handhold being mounted to an upper end of said upper section which constitutes the free end of the respective post and said upper section having a hole formed in the proximity of a lower end thereof, said middle support member being connected to an upper end of said lower section with a hole formed in the proximity of the upper end of said lower section to be in communication with the second interior space defined within said middle support member, said middle section having an upper end and an opposite lower end, each having a hole formed thereon respectively corresponding to the holes formed on said upper section and said lower section;
- first release means comprising a release bar movably disposed within the first interior space defined within said handhold and biased by first biasing means to abut against a bottom of said handhold, said bottom having a portion separated therefrom and movable relative thereto for depressing said release bar against said first biasing means, said first release means further comprising a plug movably fit into each of said upper sections with a lower end thereof projecting out of the lower end of the upper section and into said middle section, said plug having an opposite upper end connected to said release bar by a linking member so that by depressing the release bar, the plug is moved within the upper section, said plug defining therein a cavity having an inclined camming surface formed therein;
- first engaging means comprising a first retaining pin biased by first pin biasing means disposed in the cavity defined within said plug to extend through the hole of the upper section and the hole formed on the upper end of the middle section to retainingly engage the upper section and the middle section to each other to be in a relative expanded condition, said first retaining pin being disposed within the cavity so as to be in contact engagement with the camming surface and thus be withdrawn out of the holes through which the first retaining pin extends by the camming surface when the plug is moved by said release bar to break the retaining engagement between the upper section and the middle section;
- a second retaining pin disposed within the second interior space defined within said middle support member and biased by second pin biasing means to extend through the hole of the lower section and the hole formed on the lower end of the middle section so as to retainingly engage the middle section and the lower section to each other to be in a relative expanded condition;
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- second release means comprising an expanded, round-headed end portion formed on the lower end of said plug so that when the upper section is released to telescope into the middle section by the depressing of said release bar, the round-headed end of said plug contacts and acts upon the second retaining pin to force the second retaining pin into the second interior space to break the retaining engagement between the middle section and the lower section.