Due to the advancement and development of technology, computers have become indispensable and necessary tools for people in work and daily life. Furthermore, due to the high-functionalization of electronic products, the rapid development of high-speed and modernization, gradually notebooks The trend of computers has hit senior business people and gradually spread to general users. The line-headed notebooks are mostly of a flip-up type. In order to meet the design considerations of thinness, smallness and light weight, and the hinge structure used must also change according to the thinness and smallness of the notebook, they are generally designed as a base consisting of the main body and keyboard And the upper cover composed of the display screen and the cover body is composed of two parts. When the notebook computer is not in use or in a closed state, the upper cover is closed on the base, and the upper cover needs to be lifted up to an appropriate angle during use to facilitate operation.