Demonstrator able to two-way regulate wrist watch length and width

The utility model relates to a two-way display capable of automatically regulating the length and the width of a wrist watch. The display comprises a carrier frame of a wrist watch and a column-shaped actuating cylinder, wherein the carrier frame of a wrist watch is approximately elliptical and is connected with a base in a positioning mode; besides, the carrier frame of a wrist watch can be engaged and disengaged up and down and telescopic; the column-shaped actuating cylinder can be used for automatically regulating the length of the carrier frame of a wrist watch by the expansion and the contraction of a spring. One side of the bus bar of the column-shaped actuating cylinder is provided with an actuating cylinder of a piston, which moves and automatically extends and shrinks in a cylinder body to regulate the width of the carrier frame under the action of the spring. Consequently, the automatic regulation for the size in the length direction and in the width direction of the display of a wrist watch is realized. The utility model has the advantages of quick installation and convenience; besides, the utility model has high times aesthetic sense.