Wheel holder assembly for shoe

Abstract

A wheel holder assembly includes a mounting frame fixedly mounted inside one bottom hole of the sole of a shoe, a wheel holder frame turned about a shaft in the mounting frame to hold a wheel between a received (the non-operative) position and an extended (the operative) position, a torsional spring adapted to support the wheel holder frame in the extended position, and a spring-supported, press pin-controlled locking device adapted to lock the wheel holder frame between the received position and the extended position.

What the invention claimed is:  
     
         1 . A wheel holder assembly installed in one bottom hole of the sole of a shoe and alternatively set between a received position and an extended position, comprising 
 a substantially U-shaped mounting frame invertedly fixedly fastened to the bottom hole of the sole of the shoe, said mounting frame having two downwardly extended parallel sidewalls including a first sidewall and a second sidewall;    a shaft connected between the downwardly extended parallel sidewalls of said mounting frame;    a wheel holder frame holding a wheel and adapted to be turned about said shaft between said received position and said extended position, said wheel holder frame comprising two parallel positioning lugs respectively pivoted to said shaft, said positioning lugs each having a first retaining notch, a second retaining notch, and a smoothly arched guide edge connected between said first retaining notch and said second retaining notch;    a torsional spring mounted on said shaft and connected between said mounting frame and said wheel holder frame and adapted to support said wheel holder frame in said extended position; and    a locking device installed in said mounting frame and adapted to lock said wheel holder frame in one of said received position and said extended position, said locking device comprising a rod member, said rod member having a fixed end riveted to the first sidewall of said mounting frame and a free end, a barrel axially movably sleeved onto the free end of said rod member and adapted to engage one of the first retaining notch and second retaining notch of one of said positioning lugs of said wheel holder frame to further lock said wheel holder frame in one of said received position and said extended position, a spring member mounted on said rod member to force said barrel into engagement with one of the first retaining notch and second retaining notch of one of said positioning lugs of said wheel holder frame, and a press pin pivoted to a pivot hole on the second sidewall of said mounting frame and fixedly connected to one end of said barrel for pressing by the user to move said barrel axially relative to said rod member against said spring member and to disengage said barrel from the positioning lugs of said wheel holder frame for enabling said wheel holder frame to be turned about said shaft between said received position and said extended position.