Fitting system for a vehicle seat

1. A fitting system for a vehicle seat, the fitting system comprising:

at least one fitting which comprises a first fitting part and a second fitting part which are able to be interlocked and rotated relative to one another about an axis;

a transmission bar, the rotation thereof unlocking the fitting;

at least one operating element, the actuation thereof effecting the rotation of the transmission bar;

a gear module configured as a differential gear and arranged concentrically to the axis and which is configured as a pre-mounted sub-assembly which decouples the rotation of the fitting parts and the rotation of the transmission bar from one another, the gear module comprising components which are mechanically activated by the manually actuated operating element acting on the first fitting part or the second fitting part of the at least one fitting, the gear module comprising a first half-closed ring gear and a second half-closed ring gear, the first half-closed ring gear comprising a first half-closed ring gear open side and a first half-closed ring gear front face, the second half-closed ring gear comprising a second half-closed ring gear open side and a second half-closed ring gear front face, the first ring gear and the second ring gear facing one another with the first half-closed ring gear open side facing the second half-closed ring gear open side and the first half-closed ring gear and the second half-closed ring gear being assembled at the first half-closed ring gear front face and the second half-closed ring gear front face to form a housing of the gear module.

2. The fitting system as claimed in claim 1 , wherein the gear module has two planetary gear systems which are geometrically the same and which are arranged axially adjacent and which are coupled together kinematically by means of a common planet carrier.

3. The fitting system as claimed in claim 1 , wherein the the first half-closed ring gear is located opposite the second half-closed ring gear in an axial direction with respect to the axis.

4. The fitting system as claimed in claim 1 , wherein the gear module is axially secured on the at least one fitting by means of a clip connection between a fastening ring of the at least one fitting and a sun wheel of the gear module.

5. The fitting system as claimed in claim 1 , further comprising clip connection means for axially holding together the components of the gear module, the clip connection means securing the gear module to the fitting.

6. The fitting system as claimed in claim 1 , wherein the gear module has radially protruding arms for the fastening and/or for the activation by means of the operating element.

7. A fitting system as claimed in claim 1 , wherein the first half-closed ring front face is located opposite the second half-closed ring front face in an axial direction with respect to the axis.

8. A fitting system for a vehicle seat, the fitting system comprising:

at least one fitting which comprises a first fitting part and a second fitting part which are able to be interlocked and rotated relative to one another about an axis;

a transmission bar, the rotation thereof unlocking the fitting;

at least one operating element, the actuation thereof effecting the rotation of the transmission bar;

a gear module configured as a differential gear and arranged concentrically to the axis and which is configured as a pre-mounted sub-assembly which decouples the rotation of the fitting parts and the rotation of the transmission bar from one another, the gear module comprising components which are mechanically activated by the manually actuated operating element acting on the first fitting part or the second fitting part of the at least one fitting, wherein the gear module comprises

two planetary gear systems which are geometrically the same and which are arranged axially adjacent and which are coupled together kinematically by means of a common planet carrier

a first ring gear which is connected fixedly in terms of rotation to the first fitting part,

at least one first planet gear which meshes with the first ring gear,

a planet carrier which rotatably mounts the at least one first planet gear,

a first sun wheel which meshes with the at least one first planet gear and which is connected fixedly in terms of rotation to the second fitting part,

a second ring gear,

at least one second planet gear which meshes with the second ring gear and which the planet carrier rotatably mounts, and

a second sun wheel which meshes with the at least one second planet gear, wherein the operating element cooperates mechanically with the second ring gear and/or the second sun wheel for activating the gear module, and wherein the second sun wheel is connected fixedly in terms of rotation or is coupled for entrainment to the transmission bar in order to act on the at least one fitting.

9. A fitting system for a vehicle seat, the fitting system comprising:

at least one fitting which comprises a first fitting part and a second fitting part which are able to be interlocked and rotated relative to one another about an axis;

a transmission bar, the rotation thereof unlocking the fitting;

at least one operating element, the actuation thereof effecting the rotation of the transmission bar;

a gear module configured as a differential gear and arranged concentrically to the axis and which is configured as a pre-mounted sub-assembly which decouples the rotation of the fitting parts and the rotation of the transmission bar from one another, the gear module comprising components which are mechanically activated by the manually actuated operating element acting on the first fitting part or the second fitting part of the at least one fitting; and

a shift cable wherein the operating element cooperates mechanically with the shift cable which is connected to a shift arm component of the gear module provided on a ring gear.

10. A fitting system for a vehicle seat, the fitting system comprising:

at least one fitting which comprises a first fitting part and a second fitting part which are able to be interlocked and rotated relative to one another about an axis;

a transmission bar, the rotation thereof unlocking the fitting;

at least one operating element, the actuation thereof effecting the rotation of the transmission bar; and

a gear module configured as a differential gear and arranged concentrically to the axis and which is configured as a pre-mounted sub-assembly which decouples the rotation of the fitting parts and the rotation of the transmission bar from one another, the gear module comprising components which are mechanically activated by the manually actuated operating element acting on the first fitting part or the second fitting part of the at least one fitting, wherein

a toothed wheel is formed on the first fitting part,

the second fitting part guides radially displaceable locking bars which cooperate with the toothed wheel in order to lock the fitting,

a spring-loaded eccentric, which is rotatable by means of a drive element, acts upon the locking bars and

the transmission bar, when rotated, rotates the drive element which as a result rotates the eccentric.

11. A vehicle seat comprising:

a seat part;

a backrest which is attached to the seat part; and

a fitting system, the backrest being pivotable relative the seat part and the backrest being locked thereto by means of a fitting system, the fitting system comprising:

a fitting which comprises a first fitting part and a second fitting part which are able to be interlocked and rotated relative to one another about an axis;

a transmission bar, the rotation thereof unlocking the fitting;

at least one operating element, the actuation thereof effecting the rotation of the transmission bar;

a gear module configured as a differential gear and arranged concentrically to the axis and which is configured as a pre-mounted sub-assembly which decouples the rotation of the fitting parts and the rotation of the transmission bar from one another, the gear module comprising components which are mechanically activated by the manually actuated operating element acting on the first fitting part or the second fitting part of the at least one fitting, wherein the gear module comprises:

two planetary gear systems which are geometrically the same and which are arranged axially adjacent and which are coupled together kinematically by means of a common planet carrier

a first ring gear which is connected fixedly in terms of rotation to the first fitting part;

at least one first planet gear which meshes with the first ring gear;

a planet carrier which rotatably mounts the at least one first planet gear;

a first sun wheel which meshes with the at least one first planet gear and which is connected fixedly in terms of rotation to the second fitting part;

a second ring gear;

at least one second planet gear which meshes with the second ring gear and which the planet carrier rotatably mounts; and

a second sun wheel which meshes with the at least one second planet gear, wherein the operating element cooperates mechanically with the second ring gear and/or the second sun wheel for activating the gear module, and wherein the second sun wheel is connected fixedly in terms of rotation or is coupled for entrainment to the transmission bar in order to act on the at least one fitting.

12. The vehicle seat as claimed in claim 11 , further comprising a shift cable wherein the operating element cooperates mechanically with the shift cable which is connected to a shift arm component of the gear module provided on a ring gear.

13. The vehicle seat as claimed in claim 11 , wherein the gear module comprises two half-closed ring gears which face one another with their open sides and assembled together form a housing of the gear module.

14. The vehicle seat as claimed in claim 11 , wherein the gear module is axially secured on the at least one fitting by means of a clip connection between a fastening ring of the at least one fitting and a sun wheel of the gear module.

15. The vehicle seat as claimed in claim 11 , further comprising clip connection means for axially holding together the components of the gear module the clip connection means securing the gear module to the fitting.

16. The vehicle seat as claimed in claim 11 , wherein the gear module has radially protruding arms for the fastening and/or for the activation by means of the operating element.

17. The vehicle seat as claimed in claim 11 , wherein:

a toothed wheel is formed on the first fitting part;

the second fitting part guides radially displaceable locking bars which cooperate with the toothed wheel in order to lock the fitting;

a spring-loaded eccentric, which is rotatable by means of a drive element, acts upon the locking bars; and

the transmission bar, when rotated, rotates the drive element which as a result rotates the eccentric.

18. A vehicle seat comprising:

a seat part;

a backrest which is attached to the seat part; and

a fitting system, the backrest being pivotable relative the seat part and the backrest being locked thereto by means of a fitting system, the fitting system comprising:

a fitting which comprises a first fitting part and a second fitting part which are able to be interlocked and rotated relative to one another about an axis;

a transmission bar, the rotation thereof unlocking the fitting;

at least one operating element, the actuation thereof effecting the rotation of the transmission bar;

a gear module configured as a differential gear and arranged concentrically to the axis and which is configured as a pre-mounted sub-assembly which decouples the rotation of the fitting parts and the rotation of the transmission bar from one another, the gear module comprising components which are mechanically activated by the manually actuated operating element acting on the first fitting part or the second fitting part of the at least one fitting; and

a shift cable, wherein the operating element cooperates mechanically with the shift cable which is connected to a shift arm component of the gear module provided on a ring gear.

19. A vehicle seat comprising:

a seat part;

a backrest which is attached to the seat part; and

a fitting system, the backrest being pivotable relative the seat part and the backrest being locked thereto by means of a fitting system, the fitting system comprising:

a fitting which comprises a first fitting part and a second fitting part which are able to be interlocked and rotated relative to one another about an axis;

a transmission bar, the rotation thereof unlocking the fitting;

at least one operating element, the actuation thereof effecting the rotation of the transmission bar; and

a gear module configured as a differential gear and arranged concentrically to the axis and which is configured as a pre-mounted sub-assembly which decouples the rotation of the fitting parts and the rotation of the transmission bar from one another, the gear module comprising components which are mechanically activated by the manually actuated operating element acting on the first fitting part or the second fitting part of the at least one fitting, wherein:

a toothed wheel is formed on the first fitting part;

the second fitting part guides radially displaceable locking bars which cooperate with the toothed wheel in order to lock the fitting;

a spring-loaded eccentric, which is rotatable by means of a drive element, acts upon the locking bars; and

the transmission bar, when rotated, rotates the drive element which as a result rotates the eccentric.