Door unit having a door opening mechanism

1. A door unit for a lavatory facility on board an aircraft, comprising:

a door element;

a door frame; and

a locking and release mechanism;

an articulated device for holding the door element on the door frame so as to be movable between an open position and a closed position;

wherein the locking and release mechanism comprises a locking device and a release device;

wherein by the locking device the door element is locked in the closed position in the door frame so that any opening of the door element from outside the lavatory facility is blocked;

wherein by the release device the locking device that is locking the door element in the closed position is released so that from the inside of the lavatory facility the door element will be pushed open to the outside;

wherein for releasing the locking device, the release device comprises a non-contacting sensor device that is activated with a movement of a hand of a user; and

wherein the door element is held in a two-stage manner by the locking and release mechanism:

i) wherein in a first stage the door element is arranged in the closed position in the door frame; and wherein in the first stage the door element is held against opening, with a first retention force; and

ii) wherein in a second stage the door element is held in a slightly hinged-out position with a second retention force; wherein in the slightly hinged-out position, on a side opposite the articulated device, the door element projects from the door frame at least to the extent that the door element is visible from the outside; and wherein in the second stage the door element is configured to be pushed open by the user.

2. The door unit of claim 1 ,

wherein the slightly hinged-out position is a position of the door element, in which the door projects at least by half of the thickness of a door leaf.

3. The door unit of claim 2 , wherein in the slightly hinged-out position the door element is opened to such a degree that a gap is provided between the door leaf and a door frame portion, wherein the gap allows a transmission of light between inside and outside the lavatory; and

wherein, preferably, the gap is not wider than approximately 5 centimeters.

4. The door unit of claim 1 , wherein in the closed position the door element is held against a hinge-out force that has been produced as a result of the closing process.

5. The door unit of claim 4 , wherein with the locking device released, the hinge-out force causes movement of the door element from the closed position to the slightly hinged-out position, in which the door element is held and in which the door element will be pushed open by the user.

6. The door unit of claim 1 , wherein a door closing device is provided, which pushes the door element with a closing force from the open position to the slightly hinged-out position; wherein, for manual opening, the closing force will be overcome by the user.

7. The door unit of claim 1 , wherein the sensor device is arranged on the door element in proximity to a door handle.

8. The door unit of claim 1 , wherein the sensor device is arranged on a wall element beside the door element.

9. The door unit of claim 1 , wherein push-open regions are provided on the door element, to apply a force for opening the door element by the user; and

wherein the push-open regions are visually distinguished relative to the remaining regions.

10. The door unit of claim 1 , wherein a horizontally extending handrail guidance device is provided on the door element, and wherein the sensor device is arranged in the handrail guidance device.

11. A sanitary unit for a cabin of an aircraft, wherein the sanitary unit comprises:

at least one lavatory facility;

a wall structure that at least partly encloses the lavatory facility;

an access door in the wall structure; and

a toilet inside the lavatory facility;

wherein the access door is designed as a door unit for a lavatory facility on board an aircraft, and the door unit comprises:

a door element;

a door frame; and

a locking and release mechanism;

an articulated device for holding the door element on the door frame so as to be movable between an open position and a closed position;

wherein the locking and release mechanism comprises a locking device and a release device;

wherein by the locking device the door element is locked in the closed position in the door frame so that any opening of the door element from outside the lavatory facility is blocked;

wherein by the release device the locking device that is locking the door element in the closed position is released so that from the inside of the lavatory facility the door element will be pushed open to the outside;

wherein for releasing the locking device, the release device comprises a non-contacting sensor device that is activated with a movement of a hand of a user; and

wherein the door element is held in a two-stage manner by the locking and release mechanism:

i) wherein in a first stage the door element is arranged in the closed position in the door frame; and wherein in the first stage the door element is held against opening, with a first retention force; and

ii) wherein in a second stage the door element is held in a slightly hinged-out position with a second retention force; wherein in the slightly hinged-out position, on a side opposite the articulated device, the door element projects from the door frame at least to the extent that the door element is visible from the outside; and wherein in the second stage the door element is configured to be pushed open by the user.

12. An aircraft comprising:

a fuselage structure; and

a cabin region arranged in the fuselage structure;

wherein the cabin region comprises at least one sanitary area with at least one sanitary unit with a lavatory facility; and

wherein the at least one sanitary unit is designed as a sanitary unit for a cabin of an aircraft, and the sanitary unit comprises:

at least one lavatory facility;

a wall structure that at least partly encloses the lavatory facility;

an access door in the wall structure; and

a toilet inside the lavatory facility;

wherein the access door is designed as a door unit for a lavatory facility on board an aircraft, and the door unit comprises:

a door element;

a door frame; and

a locking and release mechanism;

an articulated device for holding the door element on the door frame so as to be movable between an open position and a closed position;

wherein the locking and release mechanism comprises a locking device and a release device;

wherein by the locking device the door element is locked in the closed position in the door frame so that any opening of the door element from outside the lavatory facility is blocked;

wherein by the release device the locking device that is locking the door element in the closed position is released so that from the inside of the lavatory facility the door element will be pushed open to the outside;

wherein for releasing the locking device, the release device comprises a non-contacting sensor device that is activated with a movement of a hand of a user; and

wherein the door element is held in a two-stage manner by the locking and release mechanism:

i) wherein in a first stage the door element is arranged in the closed position in the door frame; and wherein in the first stage the door element is held against opening, with a first retention force; and

ii) wherein in a second stage the door element is held in a slightly hinged-out position with a second retention force; wherein in the slightly hinged-out position, on a side opposite the articulated device, the door element projects from the door frame at least to the extent that the door element is visible from the outside; and wherein in the second stage the door element is configured to be pushed open by the user.

13. A method for opening a door unit for a lavatory facility, with the door unit comprising a door element, a door frame, and a locking and release mechanism; wherein by an articulated device the door element is movably held on the door frame between an open position and a closed position; and wherein the locking and release mechanism comprises a locking device and a release device; and wherein by the locking device the door element is locked in the closed position in the door frame so that any opening of the door element from outside the lavatory facility is blocked; and wherein by the release device the locking device that is in a locked position will be released so that from inside the lavatory facility the door element can be pushed outside; wherein the door element is held in a two-stage manner by the locking and release mechanism: i) wherein in a first stage the door element is arranged in the closed position in the door frame; and wherein in the first stage the door element is held against opening, with a first retention force; and ii) wherein in a second stage the door element is held in a slightly hinged-out position with a second retention force; wherein in the slightly hinged-out position, on a side opposite the articulated device, the door element projects from the door frame at least to the extent that the door element is visible from the outside; and wherein in the second stage the door element is configured to be pushed open by a user; and

wherein the method comprises:

a) activating a non-contacting sensor device with a movement of a hand of the user;

b) activating the release device and releasing the locking device; and

c) pushing the door element open by the user.

14. A door unit for a lavatory facility on board an aircraft, comprising:

a door element;

a door frame;

a locking and release mechanism;

an articulated device for holding the door element on the door frame so as to be movable between an open position and a closed position;

wherein the locking and release mechanism comprises a locking device and a release device;

wherein by the locking device the door element is locked in the closed position in the door frame so that any opening of the door element from outside the lavatory facility is blocked;

wherein by the release device the locking device that is locking the door element in the closed position is released so that from the inside of the lavatory facility the door element is configured to be pushed open to the outside;

wherein for releasing the locking device, the release device comprises a non-contacting sensor device that is activated with a movement of a hand of a user; and

wherein the door element is held in a two-stage manner by the locking and release mechanism:

i) wherein in a first stage the door element is arranged in the closed position in the door frame; and wherein in the first stage the door element is held against opening, with a first retention force; and

ii) wherein in a second stage the door element is held in a slightly hinged-out position with a second retention force; wherein in the slightly hinged-out position, on a side opposite the articulated device, the door element projects from the door frame at least to the extent that the door element is visible from the outside; and wherein in the second stage the door element is configured to be pushed open by the user;

wherein in the closed position the door element is held against a hinge-out force that has been produced as a result of the closing process; and

wherein with the locking device released, the hinge-out force causes movement of the door element from the closed position to the slightly hinged-out position, in which the door element is held and in which the door element is configured to be pushed open by the user.