Headrest with carrier structure and supporting member

1. A headrest of an automotive vehicle seat comprising:

a carrier structure including at least one bar and a supporting member, said carrier structure being connected to said supporting member through at least one guide region, and said supporting member being movable with respect to said carrier structure along a linear forward path of travel from a normal position of utilization into an accident position in which said supporting member is located both in the x direction and in the z direction in front of the position of utilization; and

a drive unit comprising a tension spring and a blocking device, the blocking device blocking a movement of said tension spring in the position of utilization and including a first blocking part blocking in the position of utilization and a disengagement device, the first blocking part including an oblong opening through which engages a driver member of said carrier structure, said driver member being moveable relative to said supporting member, wherein in the position of utilization, said tension spring has a high tensile force and the tension spring acts on said first blocking part and, in the accident position, the tension spring has a low tensile force, the disengagement device is in an actuated state and said first blocking part does not hold back said tension spring.

2. The headrest as set forth in claim 1 , wherein there is provided a second blocking part, that, in the position of utilization, the two blocking parts abut on one another and that said second blocking part abuts on the supporting member.

3. The headrest as set forth in claim 1 , wherein the supporting member forms a V-shaped supporting surface for the first blocking part to fit against in the position of utilization.

4. The headrest as set forth in claim 1 , wherein a long hole cooperating with the driver member of the carrier structure is formed in the supporting member.

5. The headrest as set forth in claim 1 , wherein the driver member of the carrier structure is in the form of a tie piece.

6. The headrest as set forth in claim 1 , wherein at least one lower guide region comprises a guide profile having stop flanks and that there is provided a stop lug for cooperation with said stop flanks.

7. The headrest as set forth in claim 1 , wherein the driver member is moveable relative to said supporting member in the position of utilization.

8. A headrest of an automotive vehicle seat comprising:

a carrier structure including at least one bar and a supporting member, said carrier structure being connected to said supporting member through at least one guide region, and said supporting member being movable with respect to said carrier structure along a linear forward path of travel from a normal position of utilization into an accident position in which said supporting member is located both in the x direction and in the z direction in front of the position of utilization;

a drive unit comprising a tension spring and a blocking device, the blocking device including a first blocking part and a disengagement device, the first blocking part including an oblong opening through which engages a driver member of said carrier structure, that in the position of utilization the tensile force of said tension spring abuts on said first blocking part and that after the disengagement device has been actuated said first blocking part releases said tension spring; and

a second blocking part, wherein, in the position of utilization, the two blocking parts abut on one another and that said second blocking part abuts on the supporting member, and wherein the tension spring has a lower region and in its lower region, the tension spring abuts on a pivot and the second blocking part is pivotally connected to the supporting member about said pivot.

9. A headrest of an automotive vehicle seat comprising:

a carrier structure including at least one bar and a supporting member, said carrier structure being connected to said supporting member through at least one guide region, and said supporting member being movable with respect to said carrier structure along a linear forward path of travel from a normal position of utilization into an accident position in which said supporting member is located both in the x direction and in the z direction in front of the position of utilization;

a drive unit comprising a tension spring and a blocking device, the blocking device including a first blocking part and a disengagement device, the first blocking part including an oblong opening through which engages a driver member of said carrier structure, that in the position of utilization the tensile force of said tension spring abuts on said first blocking part and that after the disengagement device has been actuated said first blocking part releases said tension spring; and

a second blocking part, wherein, in the position of utilization, the two blocking parts abut on one another and that said second blocking part abuts on the supporting member and, in a lower region, the tension spring abuts on a pivot and the second blocking part is pivotally connected to the supporting member about said pivot.