Abstract: A wheel mechanism includes a fixing base, a wheel base, a wheel, a fixing tube and a gasket. The gasket is disposed around the fixing tube to prevent the wheel with the wheel base from moving up and down. The upper gasket may be disposed between the fixing base and the wheel base to prevent the fixing base and the wheel base from colliding with each other to generate noise. The lower gasket may be disposed between the wheel base and the fixing tube to prevent the wheel base and the fixing tube from colliding with each other to generate noise. Further, when the wheel base is pivotally connected to the fixing base by the rotating shaft, the invention may selectively dispose at least one resilient member between at least two of the fixing base, the wheel base and the rotating shaft to prevent the wheel from shimmying.

Abstract: A safety lock includes a releasing component and a locking component. The locking component is movably disposed on a frame releasing component or a stroller frame. The locking component is driven by the releasing component to move relative to the frame releasing component or the stroller frame between a blocking position and a releasing position. The locking component engages with the frame releasing component to restrain the frame releasing component from unlocking the stroller frame or engages with the stroller frame to restrain the stroller frame from being folded when the locking component is located at the blocking position, and the locking component disengages from the frame releasing component to allow the frame releasing component to unlock the stroller frame or disengages from the stroller frame to allow the stroller frame to be folded when the locking component is located at the releasing position.

Abstract: A safety lock includes a releasing component and a locking component. The locking component is movably disposed on a frame releasing component or a stroller frame. The locking component is driven by the releasing component to move relative to the frame releasing component or the stroller frame between a blocking position and a releasing position. The locking component engages with the frame releasing component to restrain the frame releasing component from unlocking the stroller frame or engages with the stroller frame to restrain the stroller frame from being folded when the locking component is located at the blocking position, and the locking component disengages from the frame releasing component to allow the frame releasing component to unlock the stroller frame or disengages from the stroller frame to allow the stroller frame to be folded when the locking component is located at the releasing position.

Abstract: A joint device includes a first latch, an actuating mechanism, and two connection parts pivotally connected to each other. The first latch is selectively moved to a first locking position for locking the two connection parts or a first unlocking position for unlocking the two connection parts. The actuating mechanism is disposed adjacent to where the two connection parts are pivotally connected. The actuating mechanism is connected to the first latch to be operable to selectively move the first latch to the first locking position or the first unlocking position, and it facilitates operation of unfolding and folding a stroller equipped with the joint device of the invention.

Abstract: A joint device includes a first latch, an actuating mechanism, and two connection parts pivotally connected to each other. The first latch is selectively moved to a first locking position for locking the two connection parts or a first unlocking position for unlocking the two connection parts. The actuating mechanism is disposed adjacent to where the two connection parts are pivotally connected. The actuating mechanism is connected to the first latch to be operable to selectively move the first latch to the first locking position or the first unlocking position, so that the structure of the joint device of the invention is simple and practical, and it facilitates operation of unfolding and folding a stroller equipped with the joint device of the invention.