Retractable handle assembly

A retractable handle assembly comprising a fixed seat, a grip device disposed in the fixed seat, a pair of cubic blocks, a pair of driven rods, a pair of inner pipes, a pair of middle pipes, a pair of outer pipes, a base seat, a pair of first positioning devices, and a pair of second positioning devices, the fixed seat having two oblong apertures, the grip device having a U-shaped seat disposed in the fixed seat, a button plate disposed in the U-shaped seat, two springs disposed between the button plate and the U-shaped seat, and a cover plate engaging with the button plate, the U-shaped seat having two downward sleeves matching the oblong apertures of the fixed seat, the cover plate having a center hole, the inner pipes inserted through the downward sleeves, the cubic blocks inserted in the inner pipes, the base seat having two upward sleeves for receiving the outer pipes, the driven rods inserted in the inner pipes, the inner pipes inserted in the middle pipes, the middle pipes inserted in the outer pipes, each of the inner pipes having a circular hole, each of the middle pipes having a round hole, each of the outer pipes having a circular aperture and a round aperture, each of the first positioning devices disposed on a bottom of the corresponding inner pipe, and each of the second positioning devices disposed on a bottom of the corresponding middle pipe, characterized in that:

• each of the first and the second positioning devices has a mount, a clamp device, a hollow cube, a plug, a helical spring, and a coiled spring,
• the mount has two lateral slide channels, a guide channel, and an oblong hole communicating with the guide channel,
• the clamp device has two elastic arms and two end posts disposed on the elastic arms,
• the hollow cube has a chamber, a U-shaped stepped flange, an opening, two lateral slant holes, and a disk,
• the plug has a column and a pillar,
• the plug is disposed in the chamber of the hollow cube,
• the column is confined by the U-shaped stepped flange,
• the helical spring is disposed between the plug and the hollow cube,
• the pillar is inserted in the helical spring,
• the coiled spring is inserted in the guide channel of the mount,
• the hollow cube is inserted in the guide channel of the mount,
• the elastic arms are inserted in the lateral slide channels of the mount, and
• the end posts are inserted in the lateral slant holes of the hollow cube.