Locking/unlocking manipulation mechanism disposed on the handlebars of baby carriage

A manipulation mechanism provided on the handlebars of a baby carriage for locking and unlocking a pair of locking means of said carriage, comprising:

• a housing;
• a single wire moving pulley rotatably supported in said housing, said pulley having a pair of wires wound at least partially therearound, first ends of the wires being connected to said pulley and opposite second ends of the wires being adopted to be respectively connected to said pair of locking means;
• a manipulation button including a main body and a drive plate extending from the main body into said housing and engaged with a portion of said pulley, said button being slidably fitted in said housing so that a portion of said main body is exposed outside said housing, inward movement of said button causing said pulley to rotate and attendantly the wires to respectively unlock the pair of locking means;
• and
• a sliding prevention stopper slidably disposed in said housing, said stopper including a sliding prevention plate extending therefrom and into said housing so that a distal end of said prevention plate can be selectively placed in contact with said drive plate to prevent said button from being moved.