WO2003020557A1 - Belt winder with mechanically switched force limiter - Google Patents
Belt winder with mechanically switched force limiter Download PDFInfo
- Publication number
- WO2003020557A1 WO2003020557A1 PCT/EP2002/009594 EP0209594W WO03020557A1 WO 2003020557 A1 WO2003020557 A1 WO 2003020557A1 EP 0209594 W EP0209594 W EP 0209594W WO 03020557 A1 WO03020557 A1 WO 03020557A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ring
- belt retractor
- control
- pawl
- switching
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/341—Belt retractors, e.g. reels comprising energy-absorbing means
- B60R22/3413—Belt retractors, e.g. reels comprising energy-absorbing means operating between belt reel and retractor frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
- B60R2022/286—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using deformation of material
- B60R2022/287—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using deformation of material of torsion rods or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
- B60R2022/288—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices with means to adjust or regulate the amount of energy to be absorbed
Definitions
- the invention relates to a belt retractor provided with a force limitation with an at least two-stage force limiting device and with a switching device which can be switched via a drive for setting a different force level for the force limiting device, the switching device being an axially displaceable in the direction of the shaft axis by the drive and the setting of the force level Serving coupling elements controlling shaft ring is provided.
- a belt retractor with the aforementioned features is described in WO 00/76814.
- the belt retractor is provided with a two-stage torsion bar as a force limiting device, the switching device in the belt retractor described ensuring that, for example, within the scope of the interaction of the belt retractor with an airbag, a switch is made from the higher force level to a lower force level at a certain point in time becomes.
- the switching device has a coupling pawl which is supported by a self-opening tendency and is held in its coupling position by an axially displaceable shaft ring; If the shaft ring is moved by the action of a pyrotechnic drive, the clutch pawl gets into it Release position without the need for additional actuation forces for the switching process.
- the switching device described above is only designed and suitable for a pyrotechnic drive that is triggered by signal control. However, there arises a problem that a high force level to be set for large occupants
- Force limiting device does not appeal to smaller occupants, such as, in particular, smaller women, adolescents and children, so that there is in fact no force limitation for this occupant group and the loads for this group of people are correspondingly high.
- the known belt retractor has a device for continuously changing the clamping length of the torsion bar, which in one embodiment of the known belt retractor can be controlled as a function of the length of the pulled-out belt strap, in that a sliding sleeve that fixes the clamping length is connected to the belt shaft via a gear.
- the disadvantage of this solution is that the sliding sleeve does not provide sufficient security for determining the clamping length of the torsion bar, and that the mechanics for a continuous adaptation of the clamping length of the torsion bar to the number of revolutions of the belt shaft and thus to the prevailing webbing extension are expensive is.
- the invention is based on the object of providing a mechanically controllable switching device in a belt retractor with the generic features, which operates as a function of the belt webbing extension.
- the drive for the shaft ring consists of a switching ring which is connected to the belt shaft in a rotationally fixed manner and is axially displaceable relative to the belt shaft and thereby acts on the shaft ring, and also consists of a control disk which is coupled to the belt shaft and can be locked in an inertia-controlled manner in the event of tripping, axially rising switching ramps are arranged on the switching ring and control disk, which in the event of the relative rotation of the belt shaft which continues to rotate in the event of a load, run against one another in relation to the control disk driven into the locking position depending on the webbing extension and thus bring about the axial displacement of the switching ring.
- the invention is associated with the advantage that a purely mechanical drive is provided for the shaft ring forming the switching device, which can also be coupled to a device that detects the webbing extension, so that the level of force limitation can also be adjusted via the dimension of the webbing extension.
- the principle of the switching device working with an axially displaceable shaft ring is advantageously retained.
- three switching ramps are arranged distributed over the circumference of the switching ring and control disk.
- a pawl which can be radially controlled into a toothing and an inertial mass which can be rotated relative to the control disc are arranged on the control disc
- the invention makes use of the principle of an inertia-controlled locking device, similarly to the case of self-locking belt retractors in the context of Vehicle-sensitive or webbing-sensitive blocking system is known.
- the pawl mounted on the control disk lies in its pivoted-in position in a recess of the inertial mass which is open to the outer circumference and that an end edge of the recess is designed as a control lug for the radial control of the pawl.
- a compression spring is provided between the control disk and the inertial mass, which is tensioned when the inertial mass rotates relative to the locked control disk.
- the toothing is arranged fixed to the housing and forms an immovable abutment for the engagement of the pawl.
- the control curve has a first section set up for actuating the switching device and a second section preventing the switching device from functioning.
- the radial width of the control curve is dimensioned in its first section such that the wobble movement of the swash plate and the pivoting out of the pawl are not impeded by the pin of the pawl guided in the control curve, and that the second section of the control curve is narrowed relative to the first section in such a way that the pawl cannot pivot out when the pin is in the second section.
- the swash plate is set in rotation by the control disk, whereby according to one embodiment, the control disk is cup-shaped on its side facing away from the switching ramps for receiving the pawl inertia mass and swash plate and on the inside of the upright Edge is provided with an internal toothing which is in engagement with an associated external toothing of the swash plate.
- the external toothing of the swash plate has a smaller number of teeth than the internal toothing of the control disk
- a gear mechanism is hereby realized so that the swash plate rotates relative to the control disk or to the belt shaft due to the offset thus formed.
- the toothing is arranged on a rotatable toothed ring and forms an adjustable abutment for the engagement of the pawl, the abutment being able to be set to an external signal as a function of the body data of a belted occupant.
- this signal can, for example, be determined as a function of the amount of webbing that has been unwound, insofar as a larger occupant needs a larger webbing pull-out than a smaller occupant when buckling up, or it can depend on the body size of the seatbelt Occupants different position of the vehicle seat can be tapped.
- this exemplary embodiment of the invention also permits stepless switching of the force limiting device.
- the toothed ring has a stop which interacts with a counter stop which is adjustable in position on the basis of an external signal.
- the counter-stop can be formed on a stop ring that surrounds the toothed ring on the outside, wherein the counter-stop of the stop ring and the stop of the toothed ring can be arranged in a radial association with one another.
- the toothed ring If the stop of the toothed ring comes into contact with the counterstop after actuation of the pawl in the internal toothing of the toothed ring, then the toothed ring is fixed in its further rotation and, at the same time, the control disk is also fixed via the engagement of the pawl, which results in the manner described for switching the force limiting device leads.
- the position of the counter-stop is determined as part of the buckling process depending on the body size of the vehicle occupant, so that the Switching time or the amount of switching for the force limiting device is fixed.
- the stop ring is set up in its angle of rotation for a complete revolution, insofar as it is assumed that in the case of large occupants, i.e. without the force limiting device being switched to a lower level, the effect of the force limiting device is greater than one full rotation of the belt shaft extends.
- the stop ring is set up for a multiple rotation, for example by arranging the stop ring on a thread, so that in addition to the rotation, an axial component can also be realized before it comes to a stop of the counter-stop with the stop of the ring gear comes.
- the toothed ring and the stop ring are rotatably mounted together in a housing cap which overlaps the control disc and is fixed on the housing of the belt retractor.
- the response threshold of the inertial mass is set with a higher G-value than the response threshold of the inertial mass forming part of the locking system belonging to the belt retractor.
- the base points of the switching ramps of the control disk and the switching ring which run against one another are arranged at a distance from one another which corresponds to the rotation angle required for the pivoting-out movement of the pawl, this ensures that at the time when the force limiting device becomes effective when blocked Belt shaft the rotation of the control disc required for swiveling the pawl is taken into account, so that if the belt shaft continues to rotate during the start-up phase of the force limitation, the switching ring with shaft ring is displaced by the switching slopes and the switchover to the low force level takes place.
- 1 is an exploded view of the belt shaft of a self-locking belt retractor with the components which control the switching device,
- FIG. 3 shows the control disk with inertial mass and pawl including the teeth fixed to the housing in a front view, Fig. 4, the control disc of Figure 3 with attached
- FIG. 5 shows the belt shaft of the belt retractor according to FIG. 1 in another embodiment
- the object of the invention is the control of the shaft ring not shown in the drawing for the present application.
- the mode of operation of the shaft ring in its switching function for the force limiting device is described in detail in WO 00/76814 used to form the genus, so that reference is made to the disclosure of WO 00/76814 with regard to these functions.
- 10 denotes a belt shaft which is part of a belt retractor provided with a force limiting device according to WO 00/76814.
- a switching ring 11 is connected in a rotationally fixed manner to the belt shaft and, as can be seen in FIG. 2, has a recess 12 in which the shaft ring for the switching of the force limiting level is received.
- a recess 13 is provided for the clutch pawl (s), which is (are) acted on by the shaft ring.
- 14 designates the multi-stage, in particular two-stage torsion bar device which is accessed by the clutch pawls controlled by the shaft ring.
- a control disk 15 is arranged on an extension 10a of the belt shaft 10, which on the one hand is carried along by the belt shaft during normal rotary movements, but on the other hand is also arranged to be relatively movable with respect to the belt shaft 10, so that the control disk 15 is rotated relative to the Belt shaft 10 is possible.
- the switching ramps located on the switching ring 11 are designated by 16a and the switching ramps attached to the control disk 15 are designated by 16b.
- the control disk 15 On its side facing away from the arrangement of the switching ramps 16b, the control disk 15 is cup-shaped with an upstanding edge 18.
- a pawl 17 which can be swiveled radially about a pivot point 25 is mounted on the control disk 15 (FIG. 3), a window 40 being formed in the upstanding edge 18 of the control disk 15, through which the pawl 17 can swivel radially.
- an inertial mass 20 which is rotatable relative to the control disc 15 is arranged in the cup-shaped control disc 15 and is coupled to the rotary movement of the control disc 15 via a compression spring 21 which is supported between the inertial mass 20 and the control disc 15.
- the inertial mass 20 is provided with a secant-like recess 27, into which the spring 21 can be inserted, which is supported with one end on an abutment 22 arranged on an edge of the recess 27 and with its opposite end against an axially from the control disk 15 protruding abutment 23 is present ( Figure 3).
- the inertial disc also has a recess 24 opening towards the peripheral edge, in which the pawl 17 rotatably mounted on the control disc 15 is accommodated in a suitable manner.
- One end edge of the recess 24 engages in the undercut in the pawl 17 and thus forms a control lug 26 which ensures that the pawl 17 is pivoted radially outward through the window 40 when the inertial mass 20 rotates relative to the control disk 15.
- a swash plate 28 is inserted into the cup-shaped control disc 15, which in turn is mounted on an eccentric 34 fixed to the housing (FIG. 4), the eccentric 34 being part of a housing cap 35, either integrally formed with it or firmly connected to it ,
- the housing cap 35 is not shown in full in FIG. 4, but is only indicated via the connection to the eccentric 34 provided with the reference number 35.
- the swash plate 28 has on its outer circumference an external toothing 29 which meshes with an internal toothing 30 formed on the upstanding edge 18 of the control disc 15, the external toothing 29 of the swash plate 28 having a smaller number of teeth than that Internal toothing 30 of the control disc 15.
- an offset is formed by the toothings 29, 30, so that the swash plate 28 relative to the control disc 15 or the belt shaft 10 is twisted.
- a control cam 31 is also formed, in which a pin 38 protrudes axially from the pawl 17, the pin 38 due to the offset formed between the control disk 15 as a carrier of the pawl 17 and the swash plate 28 during the rotary movement by the Control curve 31 moves.
- This control curve 31 has a first section 32, the radial width of which is dimensioned such that the pin 38 running in the first section 32 does not prevent the wobble movement of the swash plate 28.
- the first section 32 is provided with such a width that the radial movement of the pin 38 is not impeded by the window 40 when the pawl 17 is pivoted out radially.
- the first section 32 is followed by a second section 33 of the control cam 31, which is so wide that the wobble movement of the swash plate 28 is still not hindered.
- the pin 38 is guided in the second section 33 of the control curve 3 1 such that the pawl 17 is held in its pivoted-in position when the pin 38 is guided in the second section 33 of the control curve 31 of the swash plate 28.
- the housing cap 35 which in turn supports the eccentric 34 for mounting the swash plate 28, is cup-shaped and engages with a peripheral edge 36 over the outer circumference of the control disc 15 ( Figure 2), wherein on the peripheral edge 36 of the housing cap 35, an internal toothing 37 is formed, in which the pawl 17 engages during its radial actuation, so that the control disk 15 is fixed in its further rotational movement.
- the internal toothing 37 thus forms an immovable abutment for the engagement of the pawl 17.
- the control disk 15 rotates with the belt shaft 10. If there is a correspondingly rapid rotation of the belt shaft 10 in the belt pull-out direction in the course of an accident, the inertial mass 20 remains behind the rotary movement of the control disk 15 due to its inertia against the action of the compression spring 21, with this relative rotation between the control disk 15 and the inertial mass 20 on the control disc 15 mounted pawl 17 an angular momentum is imparted, which wants to pivot the pawl 17 radially outwards.
- This pivoting-out movement of the pawl 17 is only permitted as long as the pin 38 of the pawl 17 is located in the first section 32 of the control cam 31 located on the swash plate 28. Due to the previous putting on process of the seat belt wound on the belt shaft 10, a putting on condition is determined which corresponds to a larger or a smaller person. Correspondingly less belt webbing is pulled off the belt shaft 10 for smaller people, so that in this case the pin 38 lies in the first section 32 of the control curve 31, while the belt webbing pull-out in the case of larger people leads to the pin 38 in the second section 33 of the control curve 31 arrives.
- the blocking system for locking the belt shaft with the housing also responded to the so-called blocking side of the belt retractor, so that when the belt tension persists on the locked belt shaft 10, the force limiting device is now acted upon, which further rotates the belt shaft 10 due to the twisting of the torsion bar in the direction of the belt extension by a certain amount. This creates a certain angle of rotation until the force limitation becomes effective, by which the belt shaft 10 can continue to rotate without the torsion bar integrated in the shaft 10 already taking effect (start-up phase of the force limitation device).
- the base points of the converging switching ramps 16a and 16b of the switching ring 11 and the control disk 15 are spaced apart by the angular amount by which the control disk 15 rotates further during the actuation of the pawl 17, so that for When the control disc 15 is locked with the internal toothing 37 of the housing cap 35, the base points are directly in front of one another and the axial displacement of the switching ring 1 1 is initiated immediately when the belt shaft begins to rotate relative to the blocked control disc 15.
- the inertia control of the inertial mass 20 is set taking into account the compression spring 21 in such a way that the control system only responds at a higher response threshold than this on the blocking side of the belt retractor with the Vehicle-sensitive or webbing-sensitive control system is implemented so that the pawl 17 is not already activated in every, even during normal application processes.
- FIGS. 5 to 7 An alternative embodiment of the invention is shown in FIGS. 5 to 7, in which the switching movement is controlled in a different way via the control movement of the control disk 15. While in the exemplary embodiments described for FIGS. 1 to 4, the control of the pawl 15 into the housing-fixed toothing 37 via the swash plate 28 with the control cam 31 is or is not permitted, in the exemplary embodiment according to FIGS. 5 to 7 the toothing 37 is used as an abutment for the engagement of the Pawl 17 controlled via the inertia dimensions 20 so that in addition to an adjustment depending on the webbing extension, other parameters such as the seat position of the vehicle seat can also be used to effect the switching and thus the setting of the force limiting device.
- the exemplary embodiment according to FIGS. 5 to 7 differs from the exemplary embodiment described in relation to FIGS. 1 to 4 in that the swash plate 28 with eccentric bearing 34 is omitted and these components are replaced by a toothed ring 50 and a stop ring 52 surrounding the toothed ring 50 In accordance with the exemplary embodiment described for FIGS.
- a blocking of the rotational movement of the toothed ring 50 is also provided in that a radially outwardly projecting stop 51 is formed on the toothed ring 50, which stop is in turn arranged in a stop ring which surrounds the toothed ring 50 52 revolves.
- a counter stop 53 projects radially inwards, so that depending on the position of the counter stop 53, the stop 51 rotating with the toothed ring 50 comes into engagement in the fixed position, so that the further rotational movement of the toothed ring 50 is blocked. Because of the pawl 17 which is in engagement with the internal toothing 37 of the toothed ring 50, the control disk 15 is also fixed in its further rotation in this respective position of the counter-stop 53, so that the switching process functions as described for FIGS. 1 to 4.
- the stop ring 52 with counter-stop 53 can be adjusted depending on the body data of a belted occupant, either via a reduction gear acting on the counter-stop 53, via which the rotary movement of the belt shaft and thereby the measure of the belt webbing is tapped and transferred to the setting of the counter-stop 53, or by tapping the position of the vehicle seat, which varies depending on the body size of the occupant, and is converted into a specific position of the counter-stop 53 in accordance with a transmitted signal.
- the exemplary embodiment shown is set up in such a way that a maximum of one full rotation of the toothed ring with stop 51 within the stop ring 52 is possible before the stop 51 comes into contact with the counter stop 53 of the stop ring 52.
- the control disk can rotate due to the rotation of the toothed ring 50 with the belt shaft 10, so that the relative rotation required for shifting between the control disk 15 and switching ring 1 1 does not come about. It is assumed that the force limitation is sufficient for large occupants during one revolution of the belt shaft.
- the stop ring 52 is rotated by means of a suitable drive device into a position in which the counter-stop 53 causes the toothed ring 50 to stop correspondingly prematurely via the stop 51, so that the control disk 15 also stops its rotational movement accordingly early is and brings about the action of the switching ring 1 1, the circuit to a low level of force limitation.
- the stop ring 52 with the counter stop 53 can make several rotations before the stop 51 and counter stop 53 strike; this is, for example, the arrangement of the stop ring 52 conceivable on a thread; other constructive solutions are also encompassed by the inventive concept.
- the toothed ring 50 and the stop ring 52 can be rotatably mounted together in a housing cap which overlaps the control disc 15 and is fixed on the housing of the belt retractor.
- An adjusting device for adjusting the stop ring 52 is indicated schematically at 55, including a signal line 56.
- FIG. 7 shows the assignment of the components, including the angle of rotation indicated by 54, by means of which the stop 51 of the toothed ring 50 can rotate before it, in its end position blocking the rotation of the control disk 15, against the occupant as a function of the body data of the buckled-up occupant each set counter stop 53 bumps.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10141915.5 | 2001-08-28 | ||
DE2001141915 DE10141915C1 (en) | 2001-08-28 | 2001-08-28 | Belt roller for vehicle seat belts comprises a ring having a drive consisting of a switching ring fixed to a belt shaft, and a control plate coupled to the belt shaft |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003020557A1 true WO2003020557A1 (en) | 2003-03-13 |
Family
ID=7696745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/009594 WO2003020557A1 (en) | 2001-08-28 | 2002-08-28 | Belt winder with mechanically switched force limiter |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10141915C1 (en) |
WO (1) | WO2003020557A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012003911A1 (en) * | 2010-07-06 | 2012-01-12 | Autoliv Development Ab | Force limiting device for a motor vehicle |
JP2014019207A (en) * | 2012-07-13 | 2014-02-03 | Ashimori Ind Co Ltd | Seat belt retractor |
US9242617B2 (en) | 2011-01-12 | 2016-01-26 | Autoliv Development Ab | Seat belt retractor with a speed-regulated force-limiting device |
US9327681B2 (en) | 2011-11-30 | 2016-05-03 | Autoliv Development Ab | Belt retractor with two force-limiting devices acting in parallel |
US9884605B2 (en) | 2012-08-15 | 2018-02-06 | Autoliv Development Ab | Force-limiting device for a seat belt system |
US9969353B2 (en) | 2013-10-16 | 2018-05-15 | Autoliv Development Ab | Force-limiting device for a seat belt system |
US10053051B2 (en) | 2014-02-06 | 2018-08-21 | Autoliv Development Ab | Seat belt retractor with a velocity-controlled load limiting device |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2406832B (en) * | 2003-10-06 | 2006-09-13 | Autoliv Dev | Improvements in or relating to a safety device |
US9469272B2 (en) | 2013-03-15 | 2016-10-18 | Autoliv Asp, Inc. | Load limiting seat belt retractor with spiral turn limiter |
DE102015207558B4 (en) | 2015-04-24 | 2021-01-28 | Joyson Safety Systems Germany Gmbh | Belt retractor |
CN107215303B (en) * | 2016-03-21 | 2021-04-13 | 天合汽车科技(上海)有限公司 | Seat belt retractor, vehicle seat belt and vehicle |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2727470A1 (en) | 1977-06-18 | 1979-01-04 | Volkswagenwerk Ag | Seat belt retractor blocking mechanism - has torsion rod with optionally variable span connecting spool and blocking assembly |
US5799893A (en) * | 1997-02-19 | 1998-09-01 | Alliedsignal Inc. | Multi-level load limiting torsion bar retractor |
US5820058A (en) * | 1995-11-09 | 1998-10-13 | Trw Occupant Restraint Systems Gmbh | Retractor for a vehicle safety belt |
US5887814A (en) * | 1996-10-17 | 1999-03-30 | Nsk Ltd. | Seat belt retractor and controlling method of the same |
US6105894A (en) * | 1995-04-14 | 2000-08-22 | Autoliv Development Ab | Belt roller with damped force limiter |
WO2000076814A1 (en) | 1999-06-16 | 2000-12-21 | Autoliv Development Ab | Belt retractor with a switchable force limiter |
US6241172B1 (en) * | 1996-06-26 | 2001-06-05 | Autoliv Development Ab | Belt retractor with adjustable force-limiting device |
-
2001
- 2001-08-28 DE DE2001141915 patent/DE10141915C1/en not_active Expired - Fee Related
-
2002
- 2002-08-28 WO PCT/EP2002/009594 patent/WO2003020557A1/en not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2727470A1 (en) | 1977-06-18 | 1979-01-04 | Volkswagenwerk Ag | Seat belt retractor blocking mechanism - has torsion rod with optionally variable span connecting spool and blocking assembly |
US6105894A (en) * | 1995-04-14 | 2000-08-22 | Autoliv Development Ab | Belt roller with damped force limiter |
US5820058A (en) * | 1995-11-09 | 1998-10-13 | Trw Occupant Restraint Systems Gmbh | Retractor for a vehicle safety belt |
US6241172B1 (en) * | 1996-06-26 | 2001-06-05 | Autoliv Development Ab | Belt retractor with adjustable force-limiting device |
US5887814A (en) * | 1996-10-17 | 1999-03-30 | Nsk Ltd. | Seat belt retractor and controlling method of the same |
US5799893A (en) * | 1997-02-19 | 1998-09-01 | Alliedsignal Inc. | Multi-level load limiting torsion bar retractor |
WO2000076814A1 (en) | 1999-06-16 | 2000-12-21 | Autoliv Development Ab | Belt retractor with a switchable force limiter |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012003911A1 (en) * | 2010-07-06 | 2012-01-12 | Autoliv Development Ab | Force limiting device for a motor vehicle |
US9487184B2 (en) | 2010-07-06 | 2016-11-08 | Autoliv Development Ab | Force limiting device for a motor vehicle |
US9242617B2 (en) | 2011-01-12 | 2016-01-26 | Autoliv Development Ab | Seat belt retractor with a speed-regulated force-limiting device |
US9327681B2 (en) | 2011-11-30 | 2016-05-03 | Autoliv Development Ab | Belt retractor with two force-limiting devices acting in parallel |
JP2014019207A (en) * | 2012-07-13 | 2014-02-03 | Ashimori Ind Co Ltd | Seat belt retractor |
US9884605B2 (en) | 2012-08-15 | 2018-02-06 | Autoliv Development Ab | Force-limiting device for a seat belt system |
US9969353B2 (en) | 2013-10-16 | 2018-05-15 | Autoliv Development Ab | Force-limiting device for a seat belt system |
US10053051B2 (en) | 2014-02-06 | 2018-08-21 | Autoliv Development Ab | Seat belt retractor with a velocity-controlled load limiting device |
Also Published As
Publication number | Publication date |
---|---|
DE10141915C1 (en) | 2002-12-12 |
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