Airplane seat device

1. An airplane seat device comprising:

at least one mounting unit;

at least one backrest, which is pivotally mounted to the mounting unit through a bearing point;

at least one seat component that is coupled to the backrest; and

a backrest impact safety device, wherein

in at least a normal operating state, the backrest impact safety device is configured to rigidly connect the backrest to the seat component in a locked state, and, in at least one further operating state, the backrest impact safety device at least partially decouples the backrest from the seat component,

the backrest impact safety device is configured to at least partially reduce impact forces on the backrest at least in the event of a crash,

after the at least partial decoupling of the backrest from the seat component, the backrest impact safety device is configured to be locked in the locked state again, and

the backrest impact safety device is configured to decouple the backrest from the seat component before impact forces act upon the backrest.

2. The airplane seat device as claimed in claim 1 , wherein

the backrest impact safety device comprises at least one locking module, which, in a locked condition, allows forces to be transmitted from the backrest to the seat component and, in an unlocked condition, at least partially decouples the backrest from the seat component, and

the backrest impact safety device is transferable from the unlocked state to the locked state.

3. The airplane seat device as claimed in claim 2 , wherein the locking module has at least one locking element, which is deflectable counter to an elastic force and which in a resting state holds the backrest impact safety device in the locked state.

4. The airplane seat device as claimed in claim 3 , wherein

the backrest impact safety device comprises at least one inertia module for unlocking the backrest impact safety device, and

the inertia module is configured to at least temporarily deflect at least the locking element.

5. The airplane seat device as claimed in claim 3 , wherein the at least one locking element is configured as a pivotal lever that is fixedly connected to a housing.

6. The airplane seat device as claimed in claim 3 , wherein the at least one locking element, which is deflectable counter to an elastic force, is configured as an elastically deformable lever that is fixedly connected to a piston.

7. The airplane seat device as claimed in claim 1 , wherein the backrest impact safety device comprises at least one inertia module which in the event of a crash is transferred from a lock position into an unlock position, and wherein the backrest impact safety device is in the unlocked state when the inertia module is transferred to the unlock position.

8. The airplane seat device as claimed in claim 7 , wherein the backrest impact safety device has at least one spring element, which is configured to hold the inertia module in the lock position.

9. The airplane seat device as claimed in claim 7 , wherein the inertia module in the event of a crash is configured to be transferred from the lock position prior to the impact forces taking effect.

10. The airplane seat device as claimed in claim 7 , wherein the inertia module for unlocking the backrest impact safety device is configured to at least temporarily deflect at least a locking element.

11. The airplane seat device as claimed in claim 1 , wherein

the backrest impact safety device includes a housing, which includes a linkage element,

the linkage element is configured to be coupled to the seat component or to the backrest, and

the housing has at least one element that is displaceably mounted in the housing and that includes at least one additional linkage element, which is configured to be coupled to the seat component or to the backrest.

12. The airplane seat device as claimed in claim 11 , wherein

the housing and the element that is displaceably mounted are intercoupled by a locking module at least in the locked state of the backrest impact safety device, and

the element that is displaceably mounted is axially displaceable.

13. The airplane seat device as claimed in claim 11 , wherein the element that is displaceably mounted and the housing are intercoupled by a locking module at least in the locked state of the backrest impact safety device.

14. The airplane seat device as claimed in claim 1 , wherein

the backrest impact safety device has at least one deceleration element for absorbing inertia energy of the backrest after the at least partial decoupling, and

the deceleration element is configured to be plastically deformed.

15. The airplane seat device as claimed in claim 1 , wherein

the backrest impact safety device has at least one deceleration element for absorbing inertia energy of the backrest after the at least partial decoupling, and

the deceleration element is configured to compress a fluid.

16. An airplane seat having at least one airplane seat device as claimed in claim 1 .

17. The airplane seat device as claimed in claim 1 , wherein

the backrest impact safety device comprises at least one locking module, which, in a locked condition, allows forces to be transmitted from the backrest to the seat component and, in an unlocked condition, at least partially decouples the backrest from the seat component, and

the backrest impact safety device is transferable from the unlocked state to the locked state.