Baby carriage and lower leg rest device thereof

A frame of a baby carriage comprising:

• a frame body;
• and
• a lower leg rest device pivotally connected to the frame body, the lower leg rest device comprising:
• an engaging member;
• and
• a support member having a length adjusting mechanism, an end of the support member being pivotally connected to the frame of the baby carriage at a pivot point, the engaging member being disposed on another end of the support member, the support member being used for supporting a child safety seat, the length adjusting mechanism being used for adjusting a length between the engaging member and the pivot point
• wherein the support member comprises a connecting tube and a support tube, the support tube is U-shaped, an end of the support tube is telescopically connected to an end of the connecting tube by the length adjusting mechanism, another end of the connecting tube is pivotally connected to the frame of the baby carriage, the engaging member is disposed on the support tube, the connecting tube is hollow, an end of the support tube is telescopically accommodated in an end of the connecting tube, the support tube is detachably engaged with the connecting tube by a lock member, the lock member comprises a button, an engaging block and a resilient member, the engaging block is pivotally connected to the support tube, an end of the engaging block is detachably engaged with the connecting tube, the button is disposed on another end of the engaging block and protrudes out of the support tube, the resilient member is elastically disposed between the engaging block and the support tube, a restraining groove is formed on the support tube, a restraining pin is disposed on the connecting tube, and the restraining pin is disposed in the restraining groove.