Patent ID: 9725107
Date: 2017-08-08
CPC Classifications: B62B

Claim:
1. A foldable stroller frame comprising: two opposite foldable side frame units spaced apart from each other in a widthwise direction of said stroller frame, each of said side frame units including a foldable connection unit interconnecting said side frame units and including wherein, to unfold said stroller frame, said connecting seat is pushed downwardly to a used position so as to drive said second ends of said front and rear bottom rods to move radially away from each other such that said side frame units are driven by said front and rear bottom rods to move away from each other in the widthwise direction, such that said front leg and said handle rod of each of said side frame units pivot away from each other and such that said rear leg and said handle rod of each of said side frame units pivot away from each other; wherein, to fold said stroller frame, said connecting seat is pulled upwardly from the used position so as to drive said second ends of said front and rear bottom rods to move radially toward each other such that said side frame units are driven by said front and rear bottom rods to move toward each other in the widthwise direction, such that said front leg and said handle rod of each of said side frame units pivot toward each other and such that said rear leg and said handle rod of each of said side frame units pivot toward each other; wherein said connecting seat of said connection unit has a plurality of spaced apart and radially extending insertion grooves that are formed in an outer surrounding side thereof and that are arranged in a centrally symmetric manner, each of said insertion grooves having an open bottom side; wherein, when said stroller frame is fully unfolded, said first end of each of said front and rear bottom rods extends into and is restricted in a corresponding one of said insertion grooves; wherein said connecting seat further has a central recess that is formed in a top side thereof and that is in spatial communication with said insertion grooves, and two opposite partition walls that are provided in said central recess to define, within said central recess, an accommodating space therebetween, said accommodating space being in spatial communication with two corresponding ones of said insertion grooves that are opposite to each other in a first direction; wherein one of said front bottom rods and one of said rear bottom rods that extend respectively into said two corresponding ones of said insertion grooves each have a spring-loaded plug that is provided in said first end thereof and that is movable between a normally projecting position and a retracted position; wherein said connection unit further includes a lock mechanism that is disposed in said accommodating space in said connecting seat; and wherein, when said stroller frame is fully unfolded, said lock mechanism is operable in one of a locking state, where said spring-loaded plug of each of said one of said front bottom rods and said one of said rear bottom rods is at the projecting position and is engaged with said lock mechanism such that said first ends of said one of said front bottom rods and said one of said rear bottom rods are locked in said connecting seat, and an unlocking state, where said spring-loaded plug of each of said one of said front bottom rods and said one of said rear bottom rods is urged by said lock mechanism to move from the projecting position to the retracted position, thereby disengaging from said lock mechanism such that each of said one of said front bottom rods and said one of said rear bottom rods is able to pivot with respect to said connecting seat.