Abstract: A rotating mechanism includes a first mount having a shaft hole, a second mount having a mounting part and a shaft part, a first engagement component, and a positioning assembly having a first positioning structure and a second positioning structure. The shaft part passes through the shaft hole so that the second mount is rotatable relative to the first mount. The first engagement component is fixed to the second mount and located on one side of the first mount away from the mounting part of the second mount, so that the first engagement component rotates relative to the first mount along with the second mount. The first positioning structure disposed on the first mount and the second positioning structure disposed on the first engagement component are matching recess and protrusion that are engaged with each other so as to position the first mount and the second mount.

Abstract: A demountable assembly structure includes a first body, second body, and engaging component. The first body has a first sliding surface and a slide switch recess positioned proximate to the first sliding surface. The second body has a second sliding surface and an engaging channel positioned proximate to the second sliding surface. The engaging channel is opposite the slide switch recess. The engaging component has a slide switch and a resilient element. The resilient element has a basal portion fixedly disposed in the slide switch recess and a resilient engaging arm extended from the basal portion to the engaging channel and engaged inside the engaging channel. The resilient engaging arm has a guide surface opposite the engaging channel. When the first sliding surface slides onto the second sliding surface, the resilient engaging arm gets engaged inside the engaging channel by having the guide surface slid along the engaging channel.

Abstract: A rotating mechanism includes a first mount having a shaft hole, a second mount having a mounting part and a shaft part, a first engagement component, and a positioning assembly having a first positioning structure and a second positioning structure. The shaft part passes through the shaft hole so that the second mount is rotatable relative to the first mount. The first engagement component is fixed to the second mount and located on one side of the first mount away from the mounting part of the second mount, so that the first engagement component rotates relative to the first mount along with the second mount. The first positioning structure disposed on the first mount and the second positioning structure disposed on the first engagement component are matching recess and protrusion that are engaged with each other so as to position the first mount and the second mount.

Abstract: A demountable assembly structure includes a first body, second body, and engaging component. The first body has a first sliding surface and a slide switch recess positioned proximate to the first sliding surface. The second body has a second sliding surface and an engaging channel positioned proximate to the second sliding surface. The engaging channel is opposite the slide switch recess. The engaging component has a slide switch and a resilient element. The resilient element has a basal portion fixedly disposed in the slide switch recess and a resilient engaging arm extended from the basal portion to the engaging channel and engaged inside the engaging channel. The resilient engaging arm has a guide surface opposite the engaging channel. When the first sliding surface slides onto the second sliding surface, the resilient engaging arm gets engaged inside the engaging channel by having the guide surface slid along the engaging channel.

Abstract: A transmission dock for an electronic device includes a casing and a floatable connecting component. The casing includes a receiving chamber and two first limiting structures. A through opening is disposed at the bottom of the receiving chamber. The first limiting structures flank the through opening. The floatable connecting component includes a body, a transmission interface, and two second limiting structures. The body is movably disposed in the through opening. The transmission interface is disposed on the body. The second limiting structures are disposed on two opposing sides of the body, respectively. The second limiting structures and the first limiting structures moveably mate with each other, respectively, and limit each other, respectively.