Stroller and brake mechanism thereof

A brake mechanism for a stroller, the stroller comprising two feet disposed at two sides of the stroller respectively, a first wheel set, and a second wheel set, the brake mechanism comprising:

• a first wheel base and a second wheel base installed on the two feet respectively, the first wheel set and the second wheel set being pivotally connected to the first wheel base and the second wheel base respectively;
• a linkage part having a first end and a second end;
• a passive brake device movably connected to the first wheel base and connected to the first end of the linkage part;
• and
• an active brake device disposed on the second wheel base and connected to the second end of the linkage part, the active brake device comprising:
• a first engaging part movably disposed on the second wheel base and comprising a sliding block and an engaging rod, the second end of the linkage part being connected to the sliding block, the engaging rod passing through the sliding block;
• and
• a driving part connected to the first engaging part and pivotally connected to the second wheel base, the driving part being used for driving the first engaging part so as to move the passive brake device relative to the first wheel base via the linkage part when the driving part rotates between a locking position and a releasing position relative to the second wheel base, the engaging rod being disposed through a slot hole of the second wheel base and a guiding slot of the driving part, the guiding slot of the driving part being used for guiding the engaging rod along the slot hole to be engaged with a hub of the second wheel set and driving the sliding block to pull the linkage part so as to drive the passive brake device to be engaged with the first wheel set when the driving part rotates to the locking position relative to the second wheel base;
• wherein when the driving part is located at the locking position, the passive brake device and the first engaging part of the active brake device may constrain rotation of the first wheel set and the second wheel set, respectively.