Abstract: An artificial nail or decorative cover is used to cover a clip set. The clip set combines the nail cover or decorative cover with a plastic clip. The nail cover is a cover body with an outer surface curved like a human nail and has a wall running sideways at an inner surface of the cover. A fitting ditch between the inner surface of the cover and the thin plate wall is provided on the thin plate wall. This artificial nail cover or decorative cover can be also attached with the plastic clip to cover the clip set.

Abstract: An artificial nail or decorative cover is used to cover a clip set. The clip set combines the nail cover or decorative cover with a plastic clip. The nail cover is a cover body with an outer surface curved like a human nail and has a wall running sideways at an inner surface of the cover. A fitting ditch between the inner surface of the cover and the thin plate wall is provided on the thin plate wall. This artificial nail cover or decorative cover can be also attached with the plastic clip to cover the clip set.

Abstract: A display device for displaying an image by forming same in a space includes a concave mirror having a reflecting mirror surface of a dark color and a luminous screen for displaying a picture thereon. Light is prevented by a light shielding structure from falling in around the luminous screen. The concave mirror and the luminous screen are arranged such that light from the luminous screen will be reflected by the concave mirror to form the real image of the picture on the luminous screen in front of the concave mirror. The display device can produce visual effects of much interest and is highly effective in many applications such as display and advertisement of products for sale.