WO1998019891B1 - Seat belt retractor assembly having magnetically actuated locking mechanism - Google Patents
Seat belt retractor assembly having magnetically actuated locking mechanismInfo
- Publication number
- WO1998019891B1 WO1998019891B1 PCT/US1997/020482 US9720482W WO9819891B1 WO 1998019891 B1 WO1998019891 B1 WO 1998019891B1 US 9720482 W US9720482 W US 9720482W WO 9819891 B1 WO9819891 B1 WO 9819891B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnet
- pawl
- retractor assembly
- seat belt
- disengaged position
- Prior art date
Links
Abstract
A retractor assembly (18) for a seat belt system (12) includes a magnetically actuated locking mechanism (34) to selectively prevent extension of the seat belt (14). The locking mechanism (34) includes a pawl (36) which is selectively movable between an engaged position and a disengaged position, a magnetic actuator (38) for controlling the movement of the pawl (36) between the engaged and disengaged positions. The magnetic actuator (38) includes a permanent magnet (48) provided on the pawl (36) for movement therewith and a pole piece (50) formed from a magnetically permeable material having a pole piece magnet (52) disposed thereabout. An electromagnetic coil (56) is disposed about the pole piece (50) for selectively moving the pawl (36) from the engaged position to the disengaged position against the urging of the pole piece magnet (52).
Claims
1. A retractor assembly for use in a seat belt system comprising: a spindle rotatable in a first direction to extend a seat belt therefrom and in a second direction to retract the seat belt; a ratchet member connected for rotation with said spindle; a pawl which is movable between an engaged position, wherein said pawl engages said ratchet member to prevent rotation is said first direction, and a disengaged position, wherein said pawl does not engage said ratchet member, a first permanent magnet carried on said pawl for movement therewith and defining a first magnet pole face; and a magnetic actuator for moving said pawl between said engaged and disengaged positions, said magnetic actuator including a second hollow permanent magnet disposed about a core of a magnetically permeable material that defines a second magnet pole face, said first and second magnet pole faces having the same magnetic polarization such that said first magnet is repelled from said second magnet to normally urge said pawl toward said engaged position, said magnetic actuator further including means selectively actuable to urge said first magnet and said pawl toward said disengaged position.
2. The retractor assembly defined in Claim 1 wherein said means for urging said first magnet and said pawl toward said disengaged position includes an electromagnet that is selectively energizable to cause said second magnet pole face to assume a magnetic polarization that is opposite the magnetic polarization of said first magnet pole face such that said first magnet is attracted toward said second magnet to urge said pawl toward said disengaged position.
3. The retractor assembly defined in Claim 2 wherein said electromagnet de-energized in response a sensed operating condition.
4. The retractor assembly defined in Claim 3 wherein said sensed operating condition is a change in inertia.
5. The retractor assembly defined in Claim 3 wherein said sensed operating condition is a rapid deceleration.
17
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU55852/98A AU5585298A (en) | 1996-11-07 | 1997-11-07 | Seat belt retractor assembly having magnetically actuated locking mechanism |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/746,311 US5779178A (en) | 1996-11-07 | 1996-11-07 | Seat belt retractor assembly having magnetically actuated locking mechanism |
| US08/746,311 | 1996-11-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1998019891A1 WO1998019891A1 (en) | 1998-05-14 |
| WO1998019891B1 true WO1998019891B1 (en) | 1998-07-09 |
Family
ID=25000294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1997/020482 WO1998019891A1 (en) | 1996-11-07 | 1997-11-07 | Seat belt retractor assembly having magnetically actuated locking mechanism |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5779178A (en) |
| AU (1) | AU5585298A (en) |
| WO (1) | WO1998019891A1 (en) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2364518B (en) * | 1999-12-09 | 2002-03-20 | Delphi Automotive Sys Sungwoo | Vehicular seatbelt retractor |
| DE20113779U1 (en) * | 2001-08-20 | 2002-01-17 | TRW Occupant Restraint Systems GmbH & Co. KG, 73553 Alfdorf | Belt retractor with a pawl operated by an electromagnet |
| GB2398824B (en) * | 2003-02-25 | 2005-09-28 | Autoliv Dev | Improvements in or relating to a seat-belt retractor arrangement |
| US6916045B2 (en) * | 2003-08-20 | 2005-07-12 | Key Safety Systems, Inc. | Seat belt retractor torsion rod activity sensor |
| DE10345689A1 (en) * | 2003-10-01 | 2005-04-21 | Trw Repa Gmbh | Release mechanism for spring drive for raising bonnet of automobile engine compartment operated by supplying current to electromagnet for overcoming magnetic force of retention magnet |
| US20100117413A1 (en) * | 2004-09-23 | 2010-05-13 | Squires Keith D | Prisoner Safety Seat and Method of Use |
| NZ575464A (en) | 2009-03-10 | 2010-07-30 | Holmes Solutions Ltd | Improvements in and relating to braking mechanisms |
| NZ619034A (en) | 2013-12-16 | 2015-03-27 | Eddy Current Ltd Partnership | An assembly to control relative speed of movement between parts |
| BR112017003207B1 (en) | 2014-08-18 | 2023-01-24 | Eddy Current Limited Partnership | DEVICE, BRAKE, LINE DISPENSING DEVICE, PASSENGER SEAT RETENTION, TRANSMISSION DRIVE, AND LINEAR GUIDED SAFETY ROPE |
| EP3183805B1 (en) | 2014-08-18 | 2019-02-06 | Eddy Current Limited Partnership | Latching devices |
| EP3183803B1 (en) | 2014-08-18 | 2021-04-14 | Eddy Current Limited Partnership | Tuning of a kinematic relationship between members |
| WO2016029060A1 (en) | 2014-08-20 | 2016-02-25 | Mcgowan John Lewis | Eddy current braking device for rotary systems |
| AU2015355671B2 (en) | 2014-12-04 | 2020-11-05 | Eddy Current Limited Partnership | Latch activation between elements |
| EP3226979B1 (en) | 2014-12-04 | 2021-08-25 | Eddy Current Limited Partnership | Methods of altering eddy current interactions |
| CA2969435A1 (en) | 2014-12-04 | 2016-06-09 | Eddy Current Limited Partnership | Eddy current brake configurations |
| KR102284960B1 (en) | 2014-12-04 | 2021-08-03 | 에디 커런트 리미티드 파트너쉽 | Transmissions incorporating eddy current braking |
| CA3220079A1 (en) | 2014-12-04 | 2016-06-09 | Eddy Current Limited Partnership | Energy absorbing apparatus |
| US9989382B2 (en) * | 2015-11-17 | 2018-06-05 | Hamlin Electronics (Suzhou) Co., Ltd. | Detecting movement of a seatbelt sensor |
| EP3391060B1 (en) | 2015-12-18 | 2022-04-20 | Eddy Current Limited Partnership | A variable behaviour control mechanism for a motive system |
| JP7135726B2 (en) * | 2018-07-23 | 2022-09-13 | トヨタ自動車株式会社 | Webbing take-up device |
| US11091121B2 (en) * | 2018-07-23 | 2021-08-17 | Toyota Jidosha Kabushiki Kaisha | Webbing take-up device |
| US20220161755A1 (en) * | 2019-04-09 | 2022-05-26 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Webbing take-up device |
| JP2020172148A (en) * | 2019-04-09 | 2020-10-22 | 株式会社東海理化電機製作所 | Webbing winding device |
| DE102019205458A1 (en) * | 2019-04-16 | 2020-10-22 | Zf Friedrichshafen Ag | Device for rolling up or tightening a belt |
| DE102019213915A1 (en) * | 2019-09-12 | 2021-03-18 | Autoliv Development Ab | Belt retractor with an electrically operated blocking device |
| WO2023192049A1 (en) * | 2022-03-29 | 2023-10-05 | Indiana Mills & Manufacturing, Inc. | Ratcheting web retractor with releasable web tension limiter |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1914785A1 (en) * | 1969-03-22 | 1970-10-08 | Draftex Gmbh | Device for blocking seat belts fitted in vehicles |
| SE390255B (en) * | 1974-02-18 | 1976-12-13 | N G Y Torphammar | RELEASE DEVICE PREFERRED FOR A SAFETY BELT IN A VEHICLE |
| JPS521824A (en) * | 1975-06-24 | 1977-01-08 | Nissan Motor Co Ltd | Seat belt retractor |
| DE3804032A1 (en) * | 1988-02-10 | 1989-08-24 | Edmund Zottnik | Method and device for measuring acceleration |
| US4895317A (en) * | 1988-10-31 | 1990-01-23 | Trw Vehicle Safety Systems Inc. | Electrically actuatable locking mechanism for a seat belt retractor |
| US5224736A (en) * | 1989-02-10 | 1993-07-06 | Autoflug Gmbh & Co. | Safety belt arrangement for occupants of land vehicles and aircraft |
| DE4002845C1 (en) * | 1990-02-01 | 1991-06-13 | Morgenstern, Bodo, Prof. Dr.-Ing., 2000 Hamburg, De | Electromechanical deceleration sensor operated magnetically - has permanent magnet system mounted on leaf spring esp. for safety retention appts. in motor vehicle |
| US5538098A (en) * | 1995-05-18 | 1996-07-23 | Trw Vehicle Safety Systems Inc. | Magnetically controlled retractor |
-
1996
- 1996-11-07 US US08/746,311 patent/US5779178A/en not_active Expired - Fee Related
-
1997
- 1997-11-07 AU AU55852/98A patent/AU5585298A/en not_active Abandoned
- 1997-11-07 WO PCT/US1997/020482 patent/WO1998019891A1/en active Application Filing
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