Belt retractor

Patent metadata

Field	Value
Publication number	US-9919676-B2
Application number	US-201414773414-A
Country	US
Kind code	B2
Filing date	Mar 10, 2014
Priority date	Mar 12, 2013
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

On a belt retractor ( 10 ) for a vehicle seat belt comprising a frame ( 12 ) provided with plural locking teeth ( 24 ), a belt reel ( 14 ) which is rotatably supported in the frame ( 12 ) and includes a locking tooth system ( 26 ) corresponding to the locking teeth ( 24 ), and comprising a locking mechanism adapted to transfer the belt reel ( 14 ) from a home position in which it is freely rotatable into a locking position in which the locking tooth system ( 26 ) of the belt reel ( 14 ) engages in the locking teeth ( 24 ) of the frame ( 12 ), wherein at least one pivoting control lever ( 28 ) is provided in which one side of the belt reel ( 14 ) is rotatably supported and which is adapted to guide the belt reel ( 14 ) from the home position into the locking position, an interlock mechanism is provided which releases the pivoting movement of the control lever ( 28 ) not before the latter has been rotated in the unwinding direction (A) of the webbing out of a home position into a release position.

First claim

The invention claimed is:

1. A belt retractor ( 10 ) for a vehicle seat belt comprising a frame ( 12 ) provided with plural locking teeth ( 24 ), a belt reel ( 14 ) which is rotatably supported in the frame ( 12 ) and includes a locking tooth system ( 26 ) corresponding to the locking teeth ( 24 ), and comprising a looking mechanism adapted to transfer the belt reel ( 14 ) from a home position in which it is freely rotatable into a locking position in which the locking tooth system ( 26 ) of the belt reel ( 14 ) engages in the locking teeth ( 24 ) of the frame ( 12 ) wherein at least on pivoting control lever ( 28 ) is provided in which one side of the belt reel ( 14 ) is rotatably supported and which is adapted to guide the belt reel ( 14 ) from the home position into the locking position, wherein an interlock mechanism is provided for releasing a pivoting movement of the control lever ( 28 ) about a first axis not before the control lever has been rotated around a second axis in the unwinding direction (A) of the webbing from a home position into a release position, the first axis being spaced from the second axis.

2. The belt reactor according to claim 1 , wherein the interlock mechanism includes frame-side supporting faces ( 50 ).

3. The belt retractor according to claim 2 , wherein the frame-side supporting faces ( 50 ) are arranged at an angular distance from each other.

4. The belt retractor according to claim 2 , wherein the supporting faces ( 50 , 54 ) have sliding faces ( 52 , 56 ) extending inclined with respect to the circumferential direction.

5. The belt retractor according to claim 1 , wherein the interlock mechanism includes supporting faces ( 54 ) on the control lever.

6. The belt retractor according to claim 5 , wherein the control lever-side supporting faces ( 54 ) are arranged at an angular distance from each other.

7. The belt retractor according to claim 1 , wherein the control lever ( 28 ) is arranged on the frame by means of a bearing.

8. The belt retractor according to claim 7 , wherein the bearing consists of a slotted hole ( 36 ) and a pivot pin ( 38 ) engaging in said slotted hole ( 36 ).

9. The belt retractor according to claim 8 , wherein the pivot pin ( 38 ) is provided at bearing shell ( 30 ) arranged on the frame.

10. The belt retractor according to claim 8 , wherein the slotted hole ( 36 ) is provided at the control lever ( 28 ).

11. A belt retractor for a seat belt comprising:
a frame having locking teeth;
a belt reel rotatably supported in the frame and having a locking tooth system, the belt reel having a home position wherein rotation of the belt reel relative to the frame is permitted and a locking position wherein the locking tooth system engages the locking teeth to block rotation of the belt reel relative to the frame;
a control lever pivotable relative to the frame about a first axis to guide the belt reel between the home position and the locking position, the control lever being rotatable relative to the frame about a second axis in a webbing unwinding direction from a home position to a release position, the second axis being spaced from the first axis;
a locking mechanism for coupling the control lever for rotation with the belt reel relative to the frame, the control lever rotating from the home position to the release position relative to the frame when the control lever is coupled to the belt reel by the looking mechanism; and
an interlock mechanism, the interlock mechanism blocking pivoting of the control lever relative to the frame until the control lever rotates from the home position to the release position.

Assignees

• Trw Automotive Gmbh

Inventors

• Kielwein Thomas
• Michel Frederic

Classifications

• B60R22/36 Primary

  self-locking in an emergency ({B60R22/3405} , B60R22/343 take precedence) · CPC title

• B60R22/3413 Primary

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

• B60R22/40

  responsive only to vehicle movement · CPC title

• B60R2022/3402

  Retractor casings; Mounting thereof · CPC title

• B60R22/34

  Belt retractors, e.g. reels (anchoring devices {, e.g. guide loops} , with means to tension the belt in an emergency B60R22/195) · CPC title