Abstract: The present invention relates to a display rack which can automatically replenish the products in the front of the rack. The display rack comprises: a rack, an auto-tracking system, a sliding unit and a smooth surface. One end of the auto-tracking system is connected to the front plate of the rack and the other end of which is connected to the vertical plate of the sliding unit. The sliding unit is placed inside the rack and is able to slide freely. The smooth surface is on the inner bottom surface of the rack to reduce the sliding unit's resistance while sliding.

Abstract: The present invention relates to a switching device which connects a shower head to a water pipe or hose and enables a user to allow or stop water flowing through the shower head without controlling the faucet. The switching device comprises a casing which is screwed to a shower head, a cylindrical inner pipe which is placed inside the casing, a rubber packing which is placed in between the inner pipe and the casing, a cylindrical center pipe which is placed inside the inner pipe and is screwed to the water pipe or hose, certain gaskets which are placed in the grooves on the center pipe's surface, a fixing ring which is placed on top of the inner pipe, certain cylindrical pieces which penetrate through the fixing ring, the inner pipe and insert into the casing and a sealing cover which is screwed to the casing.