Longitudinal adjuster and vehicle seat
A longitudinal adjuster ( 10 ) for a vehicle seat ( 1 ), including at least one rail pair which is formed from a first seat rail ( 12 ) and a second seat rail ( 14 ), the seat rails ( 12, 14 ) of the rail pair encompassing one another and being movable relative to one another in the longitudinal direction (x) and being able to be locked to one another via a locking device ( 16 ), the locking device ( 16 ) having at least one locking element, in particular at least one latching plate ( 18 ) which is movable in the vertical direction (z), the longitudinal adjuster ( 10 ) having an additional locking means ( 30 ) which is normally inoperative and is actuated only in the event of a crash by mass inertia. A vehicle seat ( 1 ), in particular a motor vehicle seat, includes a seat part ( 2 ) and a longitudinal adjuster ( 10 ).
1. A longitudinal adjuster for a vehicle seat, the longitudinal adjuster comprising:
at least one rail pair comprising a first seat rail and a second seat rail, the first seat rail and the second seat rail encompassing one another and being movable relative to one another in a longitudinal direction and the first seat rail and the second seat rail being configured to be locked to one another via a locking device, the locking device having at least one locking element comprising at least one latching plate movable in a vertical direction;
an additional locking means inoperative in a normal state and actuated only in an event of a crash by mass inertia.
2. A longitudinal adjuster according to claim 1 , wherein the additional locking means is configured to be operative both in event of a front impact and a rear impact.
3. A longitudinal adjuster according to claim 1 , wherein the additional locking means is configured to be independent of the locking device.
4. A longitudinal adjuster according to claim 1 , wherein the additional locking means is reversible.
5. A longitudinal adjuster according to claim 1 , wherein the additional locking means comprises a housing having a cross section which is substantially adapted in some portions to an inner face of the first seat rail.
6. A longitudinal adjuster according to claim 5 , wherein the housing comprises at least one through-opening, wherein the at least one through-opening is defined by an edge contour of the housing having a conical or dome-shaped path which opens toward an inner face of the housing.
7. A longitudinal adjuster according to claim 5 , wherein the additional locking means comprises a pivot lever pivotally mounted via a mounting portion in a mounting opening in the housing.
8. A longitudinal adjuster according to claim 7 , wherein an additional latching element is held at an end of the pivot lever, the end of the pivot lever being opposite the mounting portion.
9. A longitudinal adjuster according to claim 1 , wherein the additional locking means comprises a sphere arranged in the housing such that the sphere is freely movable in the housing.
10. A vehicle seat, comprising
a seat part; and
a longitudinal adjuster comprising:
at least one rail pair comprising a first seat rail and a second seat rail, the first seat rail and the second seat rail encompassing one another and being movable relative to one another in a longitudinal direction and the first seat rail and the second seat rail being configured to be locked to one another via a locking device, the locking device having at least one locking element comprising at least one latching plate movable in a vertical direction;
an additional locking means inoperative in a normal state and actuated only in an event of a crash by mass inertia.
11. A vehicle seat according to claim 10 , wherein the additional locking means is configured to be operative both in event of a front impact and a rear impact.
12. A vehicle seat according to claim 10 , wherein the additional locking means is configured to be independent of the locking device.
13. A vehicle seat according to claim 10 , wherein the additional locking means is reversible.
14. A vehicle seat according to claim 10 , wherein the additional locking means comprises a housing having a cross section which is substantially adapted in some portions to an inner face of the first seat rail.
15. A vehicle seat according to claim 14 , wherein the housing comprises at least one through-opening, wherein the at least one through-opening is defined by an edge contour of the housing having a conical or dome-shaped path which opens toward an inner face of the housing.
16. A vehicle seat according to claim 14 , wherein the additional locking means comprises a pivot lever pivotally mounted via a mounting portion in a mounting opening in the housing.
17. A vehicle seat according to claim 16 , wherein an additional latching element is held at an end of the pivot lever, the end of the pivot lever being opposite the mounting portion.
18. A vehicle seat according to claim 10 , wherein the additional locking means comprises a sphere arranged in the housing such that the sphere is freely movable in the housing.