Adjustable mechanism for a seat back of a stroller

Claim 1

An adjustable mechanism for a seat back of a stroller, said stroller generally comprising two vertical posts and two inclined posts pivotally connected together at an upper portion thereof, a base portion being connected between a lower portion of said vertical posts and said inclined posts, a frame portion being connected between said lower portion of said vertical posts, a rear end of a bar being pivotally connected to said lower portion of each said vertical post and a substantially intermediate position of said bar being pivotally connected to said lower portion of a respective inclined post, a lower end of a rod being pivotally connected to each said bar between said vertical post and said inclined post; characterized in that said adjustable mechanism comprises at least one stop disposed on an inner surface of each said vertical post, a sleeve having a through hole formed along a longitudinal axis thereof, an opening being formed in a surface of said sleeve, a button having a center hole, said through hole of said sleeve and said center hole of said button being large enough for slidably receiving said vertical post and said stop, a spring element being biased between each said sleeve and a respective button, a lower end of a lever arm being pivotally connected to a lower end of each said sleeve and an upper end of said lever arm being pivotally connected to an upper end of a respective rod; said spring element biases said button forward so that said button is engageable with one said stop and so that said sleeve can not move downward; and said sleeve is freely movable downwards along said vertical post when said button is slightly depressed against said spring element.