초록

The tank flap of an automobile is locked via a wire spring with which an extension connected to the tank flap will cooperate. A spring-biased locking body keeps the wire spring in the releasing position when the tank flap initially is forced inwards.

대표청구항 ▼

The invention claimed is: 1. A locking system on a fuel door, comprising: a locking projection having a lateral locking recess, the resilient legs in the locking position being adapted to engage the lateral locking recess, an ejector body located in the cup shaped body and configured to be moved al

The invention claimed is: 1. A locking system on a fuel door, comprising: a locking projection having a lateral locking recess, the resilient legs in the locking position being adapted to engage the lateral locking recess, an ejector body located in the cup shaped body and configured to be moved along an axis between an outer and an inner position, the axis having the same direction as the axis of the locking projection in a closed position of the fuel door, wherein the ejector body is biased by a first biasing spring towards the outer position and configured to engage the locking projection when the fuel door is in the closed position, a deflection surface provided in the locking recess, the deflection surface configured to laterally deflect the spring legs when the locking projection and the ejector body are moved against the first biasing spring, and a locking body located in the cup shaped body and movable between an outer and an inner position parallel to the axis of the ejector body and biased by a second biasing spring towards the inner position, the second biasing spring engaging an outer stop of the cup shaped body, the locking body having a lateral extension configured to engage the spring legs when deflected by the deflection surface into the releasing position, wherein when in the inner position, a driver portion of the ejector body moves the locking body into the outer position against the second biasing spring when the ejector body is moved into the outer position by the first biasing spring, the spring legs being positioned below the lateral extension in the locking position. 2. The system of claim 1, wherein the locking projection has an outer cylindrical portion and a conical portion of a smaller diameter, the locking recess being located between the portions. 3. The system of claim 2, wherein the locking recess is formed by an annular groove and the deflection surface is formed by an oblique wall of the annular groove. 4. The system of claim 2, wherein the spring legs are comprised of a U-shaped wire spring, the spring legs being preferably approximately parallel in the locking position wherein the legs engage the locking recess, the spring legs being held in expended condition by the locking body in the inner position whereby the locking projection can freely move relative to the spring legs. 5. The system of claim 1, wherein the ejector body includes a sleeve portion which accommodates a coiled first biasing spring. 6. The system of claim 1, wherein the ejector body at the outer end has a flange including a radially extension, the extension being guided by a guiding slot of the cup shaped body. 7. The system of claim 1, wherein the locking element cooperates with the radial extension. 8. The system of claim 1, wherein it is located in a compartment of the cup shaped body the compartment is closed by a lid. 9. The system of claim 8, wherein in the outer position the ejector body engages the lower side of the lid. 10. The system of claim 1, wherein the locking body includes a sleeve portion wherein a coiled second biasing spring is accommodated. 11. The system of claim 8, wherein the second biasing spring is supported by the lid. 12. The system of claim 4, wherein an outer end of the locking body has one of a radial flange and an enlargement, which is engaged by the spring legs in the released position thereof. 13. The system of claim 8, wherein the lid has an opening, a sealing ring being located in the opening and cooperates with the locking projection. 14. The system of claim 13, wherein at an outer end of the ejector body an axially directed conical extension is provided, the conical extension having a surface cooperating with the annular seal in the outer position of the ejector body. 15. The system of claim 8, wherein the U-shaped spring is attached to the lid and the radial extension of the locking body is secured between the spring legs and the lid. 16. The system of claim 1, includes a locking element that is guided parallel to a moving direction of the ejector body and the locking body by guiding elements, the locking element including a locking arm that cooperates with the ejector body, the locking element being moved along the guiding elements by an electric motor. 17. The system of claim 1, includes a locking element that is movably guided transverse to a moving direction of ejector body and locking body in the cup shaped body and driven by an electric motor through transmission elements. 18. The system of claim 17, wherein the electric motor drives a disk having a spiral groove at a front surface thereof, a pin of an elongated locking element engaging the groove while the locking element is guided radially. 19. The system of claim 17, wherein the locking element has a threaded nut portion, and a transmission wheel has an outer thread which cooperates with the threaded nut portion.