Protecting trap door for connection device of fuel filler pipe of tank in e.g. electric vehicle, has mobile flap with axle and returning unit that are realized in single piece with double function of axle and axis spring

摘要

The door has an axle connecting a mobile flap (3) to a housing (4) and permitting the flap to pivot around a pivoting axis (A) from a trap door closing position in which access to a connection device is prohibited toward, a trap door opening position in which the access to the connection device is conversely authorized. A returning unit is arranged to return the mobile flap toward the opening position. The axle of the mobile flap and the returning unit are realized in a single piece with double function of the axle and a spring i.e. U-shaped axis spring (10).