Abstract: A golf bag includes a base with a U-shaped notch and a wheel set is connected to the base. The wheel set includes a shaft which extends through the notch and two guide members are axially movably connected to two ends of the shaft. Two wheels are connected to two respective outsides of the two guide members. Each guide member has an extension rod which is inserted into the notch and are movably engaged with a V-shaped groove defined in a top surface of a fixed plate in the base. An activation unit has a link and includes a movable member which has a cooperation groove. The two guide extension rods of the guide members are movably engaged with communication portions of the V-shaped groove and the cooperation groove. By pulling the link, the two wheels are pulled toward each other.

Abstract: The present invention relates to a tread exercising machine including two opposite side walls each pre-fit with a cam groove and a chain guide groove having a symmetrical track, and each having two ends pivoted with a shaft driven by a chain. A plurality of serially arranged steps are mounted between the two side walls. Each of the steps has two end faces each provided with a protruding shaft and a retaining shaft respectively. The protruding shaft is inserted into the cam groove of the side wall, and the retaining shaft is combined with the chain. In such a manner, the steps produce predetermined recycling action along the track of the cam groove, so that the tread exercising machine can perform the mountain climbing effect and the walking effect. In addition, the steps are acted fluently.