Triggerable holding device for a securing strap of an airbag, and housing for an airbag
View Patent ↗The invention relates to a releasable retaining device ( 10 ) for a tether ( 16 ) of an airbag, comprising a retainer ( 12 ), a slit ( 14 ) for receiving the tether ( 16 ), a blocking member ( 18 ) made from metal which is displaceable between a blocking position in which it maintains the tether ( 16 ) blocked in the slit ( 14 ) and a release position in which the tether ( 16 ) is released, and comprising a pyrotechnical igniter ( 20 ) coupled to the blocking member ( 18 ) such that, upon activation of the igniter ( 20 ), the blocking member is displaced from the blocking position to the release position. Moreover, a housing ( 32 ) including a retaining device ( 10 ) for an airbag is provided.
1. A releasable retaining device ( 10 ) for a tether ( 16 ) of an airbag, comprising a retainer ( 12 ), a blocking member ( 18 ) made from metal which is movably supported in the retainer ( 12 ) and which is displaceable between a blocking position in which it maintains the tether ( 16 ) blocked and a release position in which the tether ( 16 ) is released, and comprising a pyrotechnical igniter ( 20 ) coupled to the blocking member ( 18 ) such that, upon activation of the igniter ( 20 ), the blocking member is displaced from the blocking position to the release position, wherein the blocking member ( 18 ) comprises a sleeve ( 22 ) which, apart from the pyrotechnical igniter, is free from built-in parts in its interior.
2. The retaining device ( 10 ) according to claim 1 , wherein the blocking member ( 18 ) is supported to be linearly movable or to be pivotable.
3. The retaining device ( 10 ) according to claim 1 , wherein the blocking member ( 18 ) comprises a sleeve ( 22 ), a hook ( 60 ) or a piston rod ( 52 ) including a piston ( 45 , 64 ).
4. The retaining device ( 10 ) according to claim 1 , wherein the igniter ( 20 ) is tightly connected to the blocking member ( 18 ).
5. The retaining device ( 10 ) according to claim 1 , wherein the igniter ( 20 ) is tightly connected to the retainer ( 12 ).
6. The retaining device ( 10 ) according to claim 1 , wherein an end of the sleeve ( 22 ) on the far side of the igniter ( 20 ) is received to be at least substantially pressure-tightly movable within the retainer ( 12 ).
7. The retaining device ( 10 ) according to claim 1 , wherein venting holes ( 70 ) are disposed in the retainer ( 12 ).
8. The retaining device ( 10 ) according to claim 1 , wherein the retainer ( 12 ) includes a projection ( 26 ) protruding into the interior of the sleeve ( 22 ).
9. The retaining device ( 10 ) according to claim 1 , wherein the blocking member ( 18 ) and/or the igniter ( 20 ) is/are captively enclosed in the retainer ( 12 ).
10. The retaining device ( 10 ) according to claim 1 , wherein the igniter ( 20 ) is releasably or tightly connected to the retainer ( 12 ).
11. The retaining device ( 10 ) according to claim 10 , wherein the igniter ( 20 ) is connected to the retainer ( 12 ) by means of a snap-fit ( 28 ).
12. The retaining device ( 10 ) according to claim 1 , wherein the retainer has a slit ( 14 ) for receiving the tether ( 16 ), the sleeve ( 22 ) being received on both sides of the slit ( 14 ) in a seat ( 30 ).
13. A housing ( 32 ) for an airbag, comprising a retaining device ( 10 ) according to claim 1 , wherein the retaining device ( 10 ) is disposed on an outer wall of the housing ( 32 ).
14. The housing ( 32 ) for an airbag according to claim 13 , wherein the retaining device ( 10 ) is disposed on the outer face of the housing ( 32 ) and the housing ( 32 ) includes a through-opening ( 38 ) for the tether ( 16 ) so that the tether ( 16 ) can extend to the retaining device ( 10 ).
15. The housing ( 32 ) according to claim 13 , wherein the retaining device ( 10 ) is clipped to the housing ( 32 ).
16. The housing ( 32 ) according to claim 13 , wherein a safety catch is provided for the igniter ( 20 ).