Lock mechanism for a cycling vehicle

A lock mechanism for a vehicle, said vehicle having a wheel rotatably coupled to a fork portion, said fork portion having a pair of limbs;

• said lock mechanism comprising a latch part and a block fixed to said limbs of said fork portion respectively, an aperture and a recess being formed in parallel in a seat which is integrally fixed to said block;
• a pair of supports being coupled together by a shaft which is rotatably supported within said aperture so that said supports are rotatable about said shaft, a hole being vertically formed in each of said supports for slidably receiving a pair of legs of a U-shaped frame, a first notch being formed in one of said legs, a key hole being laterally formed in a first support of said supports and being arranged in parallel to an axis of said shaft, said key hole being intersected with said hole of said first support, a distance between said key hole and said shaft being equal to a distance between said aperture and said recess so that said key hole can be aligned with said recess when said supports rotate to a suitable angle, a shoulder being formed in one end of said key hole close to said seat;
• a spring and a catch being received within said recess;
• a latch pin which has a key formed on one end portion thereof having an enlarged head engaged with said shoulder when said latch pin is slidably received within said key hole, said latch pin having a second notch;
• when said key hole is aligned with said recess and when said latch pin and said catch are biased by said spring, a free end of said latch pin extending outward from said key hole, said first notch of said leg being aligned with said latch pin so that said latch pin is movable laterally relative to said leg, said catch being engaged between said seat and said first support so that said supports can not rotate about said shaft, said legs being stably maintained in position in parallel to said limbs so that said wheel is free to rotate;
• and when said latch pin is depressed into said key hole, said catch being pushed inward and received within said recess so that said supports are rotatable about said shaft, said second notch being aligned with said hole of said first support so that said legs of said frame are slidable along said holes, and a free end of said legs being engageable with said latch part and can be locked by said latch part so that said wheel can not rotate.