Structure and vehicle loading port straddle

A structure fill port for a vehicle straddle or an electric vehicle scooter type two wheels in which a loading opening (73) is suitable to be positioned fixedly within a recess (71) arranged in a wall element (48), a base end part of a cover member (76) which is able to close the loading port (73) is pivotally supported at a position adjacent to the charge port (73), and a lid (77) which is able to close the recess (71) so as to cover the cover (76) outside is pivotally supported on the wall element (48), where the structure fill port includes a retainer (93) It is operating in response to the lid (77) closes and retains a closed state of the cover (77), release means (94) operable in order to release the hold of the closed state of the cover (77 ) by retaining means (93), and a coupling means (95) operable in association with the operation of the retaining means (93) when closing the lid (77) and pivots the cover member (76) toward the closed side and where the relative positions of the cover member (76) and lid (77) placed so that the path of pivoting of an end portion of the cover member (76) does not overlap the cover (77) in the closed state, characterized in that: - the coupling means is formed as a link mechanism mechanically ( 95) of the retaining means (93) as a component; - the articulation mechanism (95) is formed by a movable part (97) forming part of the retaining means (93) and operates in response to the pivot of the cover (77) towards the closing side, and a first hinge ( 109) pivoting the cover (76) to the closing side in response to operation of the mobile part (97) closing the lid (77), the release means (94) is formed by a pushbutton (110 ) that a second joint (111) which transmits to the side of movable part (97) a force due is supported on the wall element (48) so that the button (110) can be pushed and a push operation the button (110), and the movable part (97), the first joint (109), and the second link (111) are formed as a unit connected.