A wheeled childcare device is provided that can reliably reduce or eliminate the possibility of twisting of a wire. The wheeled childcare device includes legs, a caster mechanism, and a brake mechanism. The brake mechanism is configured to stop rotation of a pair of wheels, and includes a pair of lock members, an operating member, and a connecting member connecting the operating member with the lock members. The connecting member includes: an elongated member passing through a position different from a swivel axis of the caster mechanism; a pair of moving members connected to the elongated member and configured to move in response to an operation of the operating member; and a pair of driven members each configured to be rotatable relative to a corresponding one of the moving members, and each provided with a lock support portion that supports a shaft of a corresponding one of the lock members.

A stroller frame includes a front leg, a bottom tube, a rear leg, an upper support member and a lower support member. The front leg, the bottom tube, the lower support member and the upper support member are pivotally connected to each other to form a four-bar linkage structure. The rear leg is connected to an end of the bottom tube. A lock mechanism is disposed at a pivot joint between the upper support member and the lower support member. The lock mechanism is able to lock the upper support member and the lower support member at an expanded angle, such that the front leg is able to be expanded with respect to the bottom tube. The lock mechanism is unlocked to release the upper support member and the lower support member, such that the front leg is able to be folded with respect to the bottom tube.

A wheel set brake mechanism includes a drive member mounted on the movable frame; and a brake assembly including a drive pin, a traction member and a locking member. The drive pin is operably connected to the drive member. The traction member includes a first cable and a second cable, a first end of the first cable is connected to the drive pin, a second end of the first cable extends into an inner cavity of the hollow shaft to be rotatably connected to a first end of the second cable, and a second end of the second cable is connected to the locking member. The drive member is configured to drive the drive pin to slide so that the traction member causes the locking member to slide to lock the wheel.

An unlock device includes at least one operating member, a retaining mechanism and at least one unlock module. The at least one operating member is movably disposed on a frame, wherein the frame is equipped with at least one lock mechanism. The retaining mechanism is disposed on the at least one operating member. The at least one unlock module is movably disposed on the frame and connected to the at least one lock mechanism. When the at least one operating member moves to drive the at least one unlock module to move to unlock the at least one lock mechanism, the retaining mechanism retains the at least one operating member at an unlock position.

A parking brake assembly includes a disc defining an aperture and a ramp located adjacent to the aperture; a pedal configured to rotate the disc in a locking direction or an unlocking direction; and an actuator including a body and a spring biased to push the body towards the aperture, the actuator further including a pin positioned and arranged to ride along the ramp when the disc is rotated relative to the actuator, wherein spring is allowed to push the body through the aperture and into a mating hole, of or associated with a wheel, when the disc is rotated in the locking direction such that the pin rides down the ramp, and wherein the spring is prevented from pushing the body through the aperture and into the mating hole when the disc is rotated in the unlocking direction such that the pin rides up the ramp.