Bicycle having a crank mechanism for adjusting position of a handle relative to a head tube

   
   

A bicycle includes a stem extending downwardly from a handle, and a crank mechanism interconnecting the stem and a head tube. The crank mechanism includes a frame fixed on the head tube, a lever pivoted to a front end of the frame and extending uprightly therefrom, a crank pivoted to the rear end of the frame and extending uprightly therefrom, and a coupler member pivoted to an upper end of the crank and movably connected to an upper end of the lever so as to permit co-movement of the lever, the crank and the coupler member relative to the frame and so as to permit frontward and rearward movement of the handle together with the stem relative to the head tube. A locking unit is selectively and movably connected to two of the frame, the lever, the crank and the coupler member, and is operable between locking and unlocking positions.

Una bicicleta incluye un vástago que extiende hacia abajo de una manija, y un mecanismo inestable que interconecta el vástago y un tubo principal. El mecanismo inestable incluye a un marco fijado en el tubo principal, a una palanca girada a un final delantero del bastidor y de extender vertical therefrom, a una manivela girada al final posterior del bastidor y de extender vertical therefrom, y a miembro del acoplador girado a un extremo superior de la manivela y movible conectado con un extremo superior de la palanca para permitir el co-movimiento de la palanca, de la manivela y del miembro del acoplador concerniente al marco y para permitir frontward y el movimiento postrero de la manija junto con el vástago concerniente al tubo principal. Una unidad de fijación selectivamente y movible está conectada con dos del bastidor, de la palanca, de la manivela y del miembro del acoplador, y es operable entre la fijación y posiciones que abren.

 
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