Adjusting mechanism and related child carrier

An adjusting mechanism applied to a child carrier, the child carrier comprising a supporting component and a seating component, the seating component being adapted to detachably assemble with the supporting component, the adjusting mechanism comprising:

• a first engaging component detachably disposed on the supporting component;
• a second engaging component disposed on the seating component;
• and
• a third engaging component movably located between the first engaging component and the second engaging component in a switchable manner, the second engaging component being adapted to drive the third engaging component to move between a first position and a second position, the third engaging component moving to the first position to engage with the first engaging component so as to constrain a relative movement between the seating component and the supporting component, the third engaging component moving to the second position to be separated from the first engaging component so that the seating component rotates relative to the supporting component via the adjusting mechanism.