Abstract: A portable electronic device includes a first component, a second component, a pivoting device, a cover member and a linkage module. The second component is pivotally coupled to the first component through a pivoting device. The second component has an internal space and a sunken portion. The sunken portion is in communication with the internal space. The cover member is movably embedded in the sunken portion. The linkage module is coupled to the pivoting device and the cover member for selectively pushing the cover member out of the sunken portion with the movement of the pivoting device.

Abstract: A portable electronic device includes a first component, a second component, a pivoting device, a cover member and a linkage module. The second component is pivotally coupled to the first component through a pivoting device. The second component has an internal space and a sunken portion. The sunken portion is in communication with the internal space. The cover member is movably embedded in the sunken portion. The linkage module is coupled to the pivoting device and the cover member for selectively pushing the cover member out of the sunken portion with the movement of the pivoting device.

Abstract: A device base includes a chassis, a support frame, two shielding members, a crank and a connecting rod. The chassis has an elongated slit and a pivoting seat. The support frame is slidably disposed within the elongated slit between the shielding members, and pivotally connected to the pivoting seat. One of the shield members is fixed to the support frame. The connecting rod is pivotally connected to the crank and the other shielding member. The crank is fixed to the support frame. The elongated slit is completely shielded by the support frame and at least one of the first shielding member and the second shielding member, collectively.

Abstract: A device base includes a chassis, a support frame, two shielding members, a crank and a connecting rod. The chassis has an elongated slit and a pivoting seat. The support frame is slidably disposed within the elongated slit between the shielding members, and pivotally connected to the pivoting seat. One of the shield members is fixed to the support frame. The connecting rod is pivotally connected to the crank and the other shielding member. The crank is fixed to the support frame. The elongated slit is completely shielded by the support frame and at least one of the first shielding member and the second shielding member, collectively.

Abstract: A head-mounted display includes a display device, a bonding structure connected to the display device, a driving element connected to the bonding structure, and a rotation button connected to the driving element. When the rotation button is rotated, the length of the bonding structure is changed by the driving element.