초록 ▼

An extensible draw bar device comprises a pair of outer pipes, a pair of middle pipes disposed in the corresponding outer pipes respectively, a pair of longitudinal inner pipes disposed in the corresponding middles pipes respectively, and a pair of press rods disposed in the corresponding inner pipe

An extensible draw bar device comprises a pair of outer pipes, a pair of middle pipes disposed in the corresponding outer pipes respectively, a pair of longitudinal inner pipes disposed in the corresponding middles pipes respectively, and a pair of press rods disposed in the corresponding inner pipes respectively. A transverse crossbar has two ends to receive two hollow plug seats respectively. The hollow plug seats receive two upper ends of two press rods respectively. The hollow plug seats are inserted in two upper ends of the two inner pipes respectively. An upper connecting seat has two hollow arms to receive two upper ends of the two outer pipes respectively. A lower connecting seat crosses the lower ends of the two outer pipes respectively. The upper connecting seat and the lower connecting seat connect a suitcase. Two wheel are disposed at the lower end of the lower connecting seat respectively.

대표청구항 ▼

[ I claim:] [1.] An extensible draw bar device comprising:a pair of longitudinal outer pipes, a pair of longitudinal middle pipes disposed in the corresponding outer pipes respectively, a pair of longitudinal inner pipes disposed in the corresponding middles pipes respectively, and a pair of press r

[ I claim:] [1.] An extensible draw bar device comprising:a pair of longitudinal outer pipes, a pair of longitudinal middle pipes disposed in the corresponding outer pipes respectively, a pair of longitudinal inner pipes disposed in the corresponding middles pipes respectively, and a pair of press rods disposed in the corresponding inner pipes respectively,a transverse crossbar having two ends to receive two hollow plug seats respectively, the hollow plug seats receiving two upper ends of the two press rods respectively, the hollow plug seats inserted in two upper ends of the two inner pipes respectively, a button disposed on a central portion of the transverse crossbar, a first and second oblong holes formed on an upper and lower portions of each of the outer pipes respectively, a first and second rectangular holes formed on an upper and lower portions of each of the middle pipes respectively, a rectangular slot formed on a lower portion of the inner pipe, a socket which is disposed in an interior of the outer pipe receiving the lower portion of the inner pipe, a bore formed on the socket to receive a protruded bar of a click which is disposed in the socket, a coiled spring disposed at one side of the click, the protruded bar extending from an opposite side of the click, the protruded bar inserting through the bore and the oblong hole to reach one of the rectangular holes, a shoulder of the click contacting a tip end of a pawl, the pawl connected to the socket by a pivot pin, a positioning seat having a neck on a front portion of the positioning seat and a post on a rear portion of the positioning seat, an oblong slot and a through hole formed on the positioning seat, the through hole receiving a lower end of the press rod, a snap element of the neck inserted in the rectangular slot, a sleeve which is disposed in an upper interior of the middle pipes blocking the positioning seat, the oblong slot receiving a protruded rod of a detent which is disposed in the positioning seat, an elastic element disposed at one side of the detent, the protruded rod extending from an opposite side of the detent, the protruded rod inserting through the oblong slot, a shoulder of the detent contacting a terminal end of a catch, the catch connected to the positioning seat by a pivot fastener,an upper connecting seat having two hollow arms to receive two upper ends of the two outer pipes respectively, a lower connecting seat crossing the lower ends of the two outer pipes respectively, the upper connecting seat and the lower connecting seat connected to a suitcase, respectively.