Seat belt retractor

Patent metadata

Field	Value
Publication number	US-9327680-B2
Application number	US-201013201932-A
Country	US
Kind code	B2
Filing date	Mar 3, 2010
Priority date	Mar 11, 2009
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

A seat belt retractor ( 10 ) comprises a frame ( 12 ), a belt reel ( 14 ) which is rotatably mounted in the frame ( 12 ), and a blocking pawl ( 22 ) which is provided at the belt reel ( 14 ) and is capable of engaging with a blocking teeth system ( 20 ). The blocking teeth system ( 20 ) is provided at a blocking ring ( 18 ) which is mounted at the frame ( 14 ) in a rotationally limited manner.

First claim

The invention claimed is:

1. A seat belt retractor ( 10 ) comprising a frame ( 12 ), a belt reel ( 14 ) rotatably mounted in the frame ( 12 ) and a blocking pawl ( 22 ) provided at the belt reel ( 14 ) which is capable of engaging in a blocking teeth system ( 20 ), wherein the blocking teeth system ( 20 ) is provided at a blocking ring ( 18 ), and wherein the blocking ring ( 18 ) includes a thread ( 26 ) that threadably engages a mating thread ( 28 ) provided at the frame ( 12 ) to rotatably attach the blocking ring ( 18 ) to the frame ( 12 ), the blocking teeth system being radially aligned with the thread.

2. The seat belt retractor according to claim 1 , wherein the blocking teeth system ( 20 ) is provided at an inside ( 32 ) of the blocking ring ( 18 ) and the blocking pawl ( 22 ) is capable of engaging radially outwardly in the blocking teeth system ( 20 ).

3. The seat belt retractor according to claim 2 , wherein a holding ring ( 16 ) is provided at the frame ( 12 ) and the blocking ring ( 18 ) is mounted at or in said holding ring ( 16 ), wherein the holding ring ( 16 ) includes the mating thread ( 28 ).

4. The seat belt retractor according to claim 3 , wherein a detachable holding device ( 33 ) is provided between the blocking ring ( 18 ) and the holding ring ( 16 ).

5. The seat belt retractor according claim 4 , wherein a first force limiter is functionally provided between the blocking ring ( 18 ) and the holding ring ( 16 ).

6. The seat belt retractor according to claim 5 , wherein the first force limiter is permanently connected.

7. The seat belt retractor according to claim 5 , wherein the first force limiter is selectable.

8. The seat belt retractor according to claim 5 , wherein the first force limiter and/or the second force limiter has a deformable member ( 36 ).

9. The seat belt retractor according to claim 8 , wherein the deformable member ( 36 ) is a torsion rod ( 52 ).

10. The seat belt retractor according to claim 5 , wherein the first force limiter and/or the second force limiter includes a wire ( 42 ) as well as a forming element ( 44 ) capable of deforming the wire ( 42 ).

11. The seat belt retractor according to claim 10 , wherein the forming element ( 44 ) includes a baffle ( 50 ) through which the wire ( 42 ) can be pulled.

12. The seat belt retractor according to claim 5 , wherein the first force limiter and/or the second force limiter includes a cutting force limiter ( 38 ).

13. The seat belt retractor according to claim 5 , wherein the first force limiter and/or the second force limiter includes an electromagnetic force limiter.

14. The seat belt retractor according to claim 5 , wherein that the first force limiter and/or the second force limiter includes a hydraulic, especially a hydrodynamic force limiter.

15. The seat belt retractor according to claim 4 , wherein the detachable holding device ( 33 ) is formed by a pin, especially a shear pin.

16. The seat belt retractor according to claim 2 , wherein a stop ( 34 ) capable of stopping the rotation of the blocking ring ( 18 ) is provided at or in the thread ( 26 ).

17. The seat belt retractor according to claim 16 , wherein the stop ( 34 ) is a radially extending stop face.

18. The seat belt retractor according to claim 16 , wherein the stop ( 34 ) is an axially projecting stop.

19. The seat belt retractor according to claim 2 , wherein the thread ( 26 ) is a male thread.

20. The seat belt retractor according to claim 1 , wherein a second force limiter is functionally provided between the belt reel ( 14 ) and the frame ( 12 ).

21. The seat belt retractor according to claim 20 , wherein the second force limiter is selectable.

22. The seat belt retractor according to claim 21 , wherein a lock wheel ( 58 ) of a blocking teeth system ( 59 ) is provided which is adapted to be coupled to the second force limiter, wherein a blocking pawl ( 60 ) fixed to the frame is capable of engaging in the blocking teeth system ( 59 ) and of locking the blocking wheel ( 58 ) at the frame in a rotationally fixed manner.

23. The seat belt retractor according to claim 22 , wherein the second force limiter includes a control means for controlling the blocking pawl ( 60 ).

24. The seat belt retractor according to claim 23 , wherein the control means is coupled to the blocking ring ( 18 ) and upon rotation of the blocking ring ( 18 ) connects the second force limiter.

25. The seat belt retractor according to claim 20 , wherein the second force limiter is permanently connected.

26. The seat belt retractor according to claim 1 , wherein a detachable holding device ( 33 ) is provided between the blocking ring ( 18 ) and the frame ( 12 ).

Assignees

• Gentner Bernd
• Moedinger Thomas
• Gross Oliver
• Rink Juergen
• Trw Automotive Gmbh

Inventors

• Gentner Bernd
• Moedinger Thomas
• Gross Oliver
• Rink Juergen

Classifications

• B60R22/3413 Primary

  operating between belt reel and retractor frame (B60R22/4676 takes precedence) · CPC title