Angle-adjustable bearing mechanism and knob type locking mechanism thereof

The invention discloses a knob type locking mechanism and an angle-adjustable bearing mechanism. The knob type lock catch mechanism comprises a base, a knob and a lock bolt piece. The knob is rotatably accommodated in the accommodating space of the base and is provided with a first braking part and a second braking part; the lock bolt piece is movably contained in the bearing part of the base in the linear direction and is provided with a clamping bolt, a first stress part and a second stress part, and the first stress part is located between the clamping bolt and the second stress part; when the knob rotates towards a first direction, the first braking part pushes the first stress part to drive the clamping bolt to move along the linear direction of the lock catch; when the rotary knob rotates in the second direction, the second braking part pushes the second stress part to drive the clamping bolt to move in the unlocking linear direction. The knob type lock catch mechanism and the bearing mechanism are simp