WO2010119778A1 - シートベルト用リトラクタ - Google Patents
シートベルト用リトラクタ Download PDFInfo
- Publication number
- WO2010119778A1 WO2010119778A1 PCT/JP2010/055955 JP2010055955W WO2010119778A1 WO 2010119778 A1 WO2010119778 A1 WO 2010119778A1 JP 2010055955 W JP2010055955 W JP 2010055955W WO 2010119778 A1 WO2010119778 A1 WO 2010119778A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas generator
- retractor
- gas
- flow path
- gas flow
- Prior art date
Links
- 238000003860 storage Methods 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 description 13
- 230000001133 acceleration Effects 0.000 description 8
- 238000004804 winding Methods 0.000 description 7
- 238000004512 die casting Methods 0.000 description 6
- 230000020347 spindle assembly Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
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
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
-
- 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
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
- B60R2022/4642—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators the gas directly propelling a flexible driving means, e.g. a plurality of successive masses, in a tubular chamber
Definitions
- the present invention relates to a seatbelt retractor, and more particularly to a seatbelt retractor with a force limiter mechanism.
- Some recent seat belt retractors have a force limiter mechanism that extends the belt while absorbing energy when a load greater than the setting is applied to the belt and reduces the burden on the chest of the occupant (for example, , See Patent Document 1).
- the torsion bar is configured by a plurality of shaft portions having different torsional torques, and the plurality of shaft portions of the torsion bar are switched by a switching device, thereby absorbing the energy of the force limiter mechanism. The load can be changed.
- the switching device described in Patent Document 1 switches the force transmission positions of the plurality of shaft portions by operating the switching member with the gas generated by the gas generator via the switch housing.
- the housing part of the switch housing that houses such a gas generator does not interfere with the system cover or webbing that houses the emergency lock mechanism, and has a hole in the frame for connecting the connector for the gas generator In order not to be necessary, it is formed to swell diagonally downward or diagonally along the gas flow path through which the gas passes.
- the gas flow path and the storage portion are formed in a straight line by a portion where the slide piece is pulled out by performing die casting with the slide piece inserted.
- the connector for the gas generator is connected after the retractor is attached to the vehicle so that excessive force is not applied by being pulled during assembly, and the gas generator is disposed obliquely downward. In such a case, the installation work becomes complicated. For this reason, it is desired that the storage portion be bent in a direction different from the obliquely formed gas flow path for assemblability.
- the switch housing when the switch housing is die-cast using two slide pieces that form a gas flow path and a storage portion, it is necessary to close a die-cutting hole from which the slide piece that forms the gas flow path is pulled out. Although it is conceivable to provide a lid for closing the die-cutting hole, the number of parts increases and an attaching operation is required. Further, if the switch housing is formed using lost wax, sand mold, or the like, there is no manufacturing die cutting hole, but these methods are not suitable for mass production.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to lay out a gas generator for a switching device at an optimal position, and to provide a gas flow path and a gas generator storage section.
- An object of the present invention is to provide a seat belt retractor capable of efficiently closing a hole of a switch housing which is formed by bending.
- the object of the present invention is achieved by the following configurations.
- Retractor frame A spindle rotatably supported on the retractor frame and wound with a webbing; a lock member rotatably supported on the retractor frame and fixed to the retractor frame in an emergency;
- a torsion bar disposed in a force transmission path between the spindle and the lock member and having a plurality of shaft portions having different torsional torques;
- a switching device that switches a plurality of shaft portions of the torsion bar serving as the force transmission path, The switching device communicates with a gas generator for path switching, a gas generator storage for storing the gas generator, and a gas flow through which the gas generated by the gas generator passes.
- a switch housing having a path, The gas generator housing part and the gas flow path of the switch housing are formed to be bent, A hole extending along the direction of the gas flow path on the opposite side of the gas flow path with respect to the gas generator housing is blocked from the gas flow path by the gas generator.
- Belt retractor. (2) The retractor for a seat belt according to (1), wherein the gas generating part storage part extends horizontally in a state where the retractor is attached to a vehicle. (3) The seat belt retractor according to (1) or (2), wherein the switch housing is attached to an inner side of a side plate of the retractor frame.
- the gas generator storage portion is located above the switch housing in a state where the retractor is attached to a vehicle and at a position avoiding interference with the webbing guided by the webbing guide hole of the retractor frame.
- the hole extending along the direction of the gas flow path on the opposite side of the gas flow path with respect to the gas generator housing is a die cut hole provided by die cutting (1) )
- die cutting (1) To (4), the seatbelt retractor.
- the switching device communicates with the path switching gas generator, the gas generator storage section for storing the gas generator, and the gas generator storage section, and is generated by the gas generator.
- a switch housing having a gas flow path through which the gas to be passed is formed, and the gas generator housing part and the gas flow path of the switch housing are formed to be bent, and the gas flow path with respect to the gas generator housing part
- the hole extending along the direction of the gas flow path on the opposite side is blocked from the gas flow path by the gas generator.
- FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, excluding a part of the winding spring device and the pretensioner.
- FIG. 5 is a sectional view taken along line VV in FIG. 4.
- FIG. 6 is a sectional view taken along line VI-VI in FIG. 5.
- VII part enlarged view of FIG. (A) is a cross-sectional view taken along line VIII-VIII in FIG. 4 before the switching device is operated, and (b) is a cross-sectional view taken along line VIII-VIII in FIG.
- It is a perspective view of a switch housing. It is sectional drawing of the switch housing before the slide piece after die-casting is extracted.
- the seat belt retractor 10 of the present embodiment is rotatably supported by a retractor frame 11, and a spindle assembly 12 that winds up a seat belt (not shown), and the spindle assembly.
- a locking mechanism 14 that locks, a pretensioner 15 that acts on the spindle assembly 12 to retract the seat belt when the vehicle collides, and a force limiter that extends the seat belt while absorbing energy when a load greater than a set value is applied to the seat belt And a mechanism 16.
- the take-up spring device 17 and the pretensioner 15 are disposed on one end side in the axial direction of the spindle assembly 12 and attached to the retractor frame 11.
- the acceleration sensor 13 and the lock mechanism 14 are disposed on the other axial end side of the spindle assembly 12 and are accommodated in a system cover 19 attached to the retractor frame 11.
- the winding spring device 17 supports the winding spring 25, the winding spring covers 26 and 27 that house the winding spring 25, and the inner peripheral end of the winding spring 25, and the winding spring device 17 is attached to the tip of the spindle 12.
- a spring coupling portion 28 is provided.
- the acceleration sensor 13 includes a spherical sensor weight 21 and a sensor case 22 that houses the sensor weight 21, and a sensor lever 22a is rotatably attached to the sensor case 22 by a shaft member 22b.
- the lock mechanism 14 can employ various known configurations.
- the lock mechanism 14 includes the WS lever 32, the steering wheel 33, the inertial body 34, and the spring 35 between the side plate 11a of the retractor frame 11 and the bearing plate 31 attached to the side plate 11a.
- the inertia body 34 is attached to the steering wheel 33 so as to be relatively rotatable
- the WS lever 32 is attached to the steering wheel 33 so as to be rotatable while being urged by a spring 35.
- the WS lever 32 rotates against the urging force of the spring 35 to engage with the internal teeth 31 a of the bearing plate 31.
- the sensor weight 21 of the acceleration sensor 13 moves, and the sensor lever 22a is rotated upward. Subsequently, the sensor lever 22 a rotates upward and engages with the steering wheel 33.
- the steering wheel 33 is delayed in rotation with respect to the spindle 12 and is attached to the steering wheel 33 so as to be rotatable.
- a lock piece 67 described later moves radially outward and engages with lock teeth 11f formed on the inner side of the side plate 11a of the retractor frame 11, and the operation of pulling out the seat belt by the spindle 12 is locked.
- the pretensioner 15 includes a bearing bush 41, a pretension ring 42, ball guides 43 and 44, and a ball trap 49 between the side plate 11b of the retractor frame 11 and the tube cover 18 attached to the side plate 11b.
- a drive device 51 is provided around the pretension ring 42.
- the driving device 51 includes a pipe housing 52 attached to the retractor frame 11, a gas generator 53 provided in the pipe housing 52, a spring 54, a piston 55, and a ball 56 as a mass body.
- a connector 57 is attached to the gas generator 53, and the balls 56 are pushed out through the piston 55 due to a gas pressure increase caused by ignition of the gas generator 53, and these balls 56 are grooved 42 a of the pretension ring 42. Then, the pretension ring 42 is rotated.
- the spring 54 prevents the generation of abnormal noise due to the rattling of the normal ball 56.
- Reference numeral 58 denotes a ball stopper spring for holding the ball 56 in a non-actuated state, 59 a twin ball for non-synchronizing with the pinion gear 42, and 59a a twin ball clip. is there.
- the pre-tension ring 42 is spline-fitted with one end of the spindle 61 to rotate integrally with the spindle 61, and a groove 42a for accommodating the ball 56 of the driving device 51 is formed on the outer peripheral side thereof.
- the spindle assembly 12 includes a spindle 61, a tread head 62 that is a locking member that closes the opening on one end thereof, a torque tube 64 disposed in the spindle main body 61, and a force that constitutes a shaft portion having different torsional torque.
- First and second torsion bars 65, 66 as limiter mechanism 16 lock piece 67 guided to the outer peripheral surface of tread head 62, end piece 69 attached to the periphery from the other end side of spindle 61,
- a spindle ring 70 that is mounted so as to be axially movable around the cylindrical portion 69 a of the end piece 69 and a pair of through holes 61 a (see FIG. 8) formed in the spindle 61 are rotatable.
- reference numeral 71 denotes an energy absorption stopper that regulates the relative rotation amount between the spindle 61 and the tread head 62
- 72 denotes an omega spring
- 73 denotes a safety plate.
- a switch housing 81 and a switch piston 82 are disposed inside the side plate 11a of the retractor frame 11, and a path switching gas generator 83 (MGG: micro gas generator) is attached to the switch housing 81.
- MFG micro gas generator
- the locking element 68, the end piece 69, the spindle ring 70, the switch housing 81, the switch piston 82, and the path switching gas generator 83 are switched to switch the force transmission path between the spindle 61 and the tread head 62.
- the apparatus 20 is configured.
- the shaft diameter of the first torsion bar 65 is larger than that of the second torsion bar 66, and both end portions 65a, 65b, 66a, 66b of each torsion bar are formed in a Torx (registered trademark) shape.
- a torx-shaped hole 62a is formed on the inner peripheral surface of the tread head 62, and one end 65a of the first torsion bar 65 is fitted therein.
- a torque-shaped annular groove 64 a is also provided in the axially intermediate portion on the inner peripheral surface of the torque tube 64, and the other end 65 b of the first torsion bar 65 is fitted.
- a Torx-shaped hole 65c is also formed on the inner peripheral surface of the other end 65b of the first torsion bar 65, and the one end 66a of the second torsion bar is fitted.
- the other end 66 a of the second torsion bar 66 is fitted and fixed to a Torx-shaped recess 61 b formed on the inner peripheral surface on the other end side of the spindle 61.
- the first and second torsion bars 65 and 66 are arranged in the force transmission path between the spindle 61 and the pretensioner 15.
- the locking element 68 disposed in the through hole 61 a formed in the spindle 61 rotates so as to advance and retreat into the connecting hole 64 c formed at the end of the torque tube 64.
- the locking element 68 advances into the connecting hole portion 64c of the torque tube 64 and the rotation of the locking element 68 is suppressed.
- the torque tube 64 is coupled to the spindle 61 via the pair of locking elements 68, and the spindle 61 and the torque tube 64 rotate integrally.
- the end piece 69 is made of resin, and the spindle ring 70 is positioned and fixed with respect to the spindle 61.
- the switch housing 81 of the present embodiment covers the substantially flat plate-like portion 101 and the outer peripheral surface of the switch piston 82 extending from one side surface of the substantially flat plate portion 101.
- the outer cylindrical portion 102 and the inner cylindrical portion 103 that covers the inner peripheral surface of the switch piston 82 inside the outer cylindrical portion 102 are attached to the inside of the side plate 11 a of the retractor frame 11.
- a substantially C-shaped convex portion 104 is provided along the shape of the annular concave portion 82a of the switch piston 82.
- a plurality of engaged portions 104a are formed on the outer peripheral surface of the substantially C-shaped convex portion 104, and an engaging claw 82b provided on the switch piston 82 is clicked on the engaged portion 104a.
- the switch housing 81 communicates with the gas generator storage unit 106 that stores the path switching gas generator 83 and the gas generator storage unit 106, and the gas flow path 107 through which the gas generated by the gas generator 83 passes. And having.
- the gas generator housing portion 106 is formed on the upper portion of the substantially flat plate-like portion 101 so as to extend horizontally when the retractor 10 is attached to the vehicle.
- the gas flow path 107 is formed in a substantially flat plate-like portion 101 in an obliquely downward direction, extends beyond the outer cylindrical portion 102, and has a notch having no convex portion 104 at the same radial position as the substantially C-shaped convex portion 104. It extends to the portion 104b.
- the switch housing 81 having such a shape performs die casting in a state where the two slide pieces 200 and 201 for forming the gas generator housing portion 106 and the gas flow path 107 are inserted. Then, after the switch housing 81 is formed, the gas generator housing portion 106 and the gas flow path 107 are formed by pulling out the two slide pieces 200 and 201. For this reason, when the slide piece 201 forming the gas flow path 107 is pulled out in the switch housing 81, along the direction of the gas flow path 107 on the opposite side of the gas flow path 107 with respect to the gas generator housing portion 106. A die-cutting hole 108 extending is formed.
- the die casting is performed in a state where the slide piece 201 forming the gas flow path 107 is inserted into the hole 200a of the slide piece 200 forming the gas generator housing portion 106.
- the switch housing 81 is made of zinc die casting or aluminum die casting.
- the punched hole 108 has a bottomed cylindrical cup 83 a of the gas generator 83 so as to prevent the gas from escaping when the gas generator 83 is ignited. Is blocked from the gas flow path 107.
- the bottom portion 106b of the gas generator housing portion 106 is formed so as to slightly protrude to a position beyond the gas passage 107 on the side opposite to the opening portion 106a, and the bottom portion 83b of the cup 83a extends to this protruding portion. Is partially inserted, and the cup 83a closes the die hole 108.
- a slight gap communicating with the gas flow path 107 is formed between the bottom 106b of the gas sub-generator storage unit 106 and the bottom portion 83b of the cup 83a.
- the die hole 108 may be completely sealed when the gas generator 83 is mounted, but when the gas generator 83 is ignited, the bottom portion 83b of the cup 83a is broken and the cup 83a What is necessary is just to make it block
- the connector 109 for the gas generator is attached to the gas generator 83 housed in the gas generator housing portion 106 after the retractor 10 is attached to the vehicle.
- the gas generator storage unit 106 is disposed above the connecting plate 11c of the retractor frame 11, and below and to the side of the webbing guide hole 11e of the upper stay 11d attached to the connecting plate 11c of the retractor frame 11.
- the upper stay 11d is formed with a notch 11g partially along the shape of the gas generator housing 106 so as not to interfere with the gas generator housing 106.
- the gas generator 83 is optimal without interfering with the webbing guided by the webbing guide hole 11e below the webbing guide hole 11e of the upper stay 11d and between the side plates 11a and 11b of the retractor frame 11. It is laid out at a convenient position and has a compact structure.
- the gas passes through the gas flow path 107, and the substantially C-shaped convex portion 104 of the switch housing 81 and the annular shape of the switch piston 82 from the notch 104b. It spreads in the space S between the recesses 82a. Then, the engagement between the engagement claw 82b of the switch piston 82 and the engaged portion 104a of the switch housing 81 is released, and the switch piston 82 can be moved in the axial direction.
- the pretensioner 15 receives an electric current for operation from the vehicle side, and the ball 56 moves in the pipe housing 52 due to a gas pressure increase due to ignition of the gas generator 53 of the drive device 51.
- the moved ball 56 enters the groove portion 42 a of the pretension ring 42 from the tube housing 52 and rotates the pretension ring 42.
- the rotational force of the pretension ring 42 is transmitted to the spindle 61 to wind up the seat belt fixed to the spindle 61.
- the pretensioner 15 is activated.
- the tread head 62 is locked to the retractor frame 11, and the first and second torsion bars 65 and 66 attached to the tread head 62 are used.
- the rotation of the spindle 61 in the webbing pull-out direction is blocked, and the webbing W pull-out operation is locked.
- the force limiter mechanism 16 is activated, and the tread head 62 fixed to the retractor frame 11 and the spindle 61 rotated by the webbing drawer
- One of the torsion bars 65, 66 provided between the two torsional twists absorbs energy and softens the impact acting on the occupant. Thereby, the tread head 13 and the spindle 12 are relatively rotated by the twist of the torsion bar 16.
- the locking element 68 is pressed against the inner peripheral surface of the spindle ring 70 and the rotation is suppressed, so that the torque tube 64 is connected to the spindle via the pair of locking elements 68. 61.
- the force transmission path between the spindle 61 and the tread head 62 is in the order of the spindle 61, the torque tube 64, the first torsion bar 65, and the tread head 62.
- first torsion bar 65 has a shaft diameter larger than that of the second torsion bar 66 and absorbs energy with a larger twisting torque than that of the second torsion bar 66.
- the force limiter mechanism 16 operates the gas generator 83 at an appropriate timing and operates the switching device 20 in relation to the operation of the air bag in the vehicle.
- the switching device 20 receives the path switching current and the path switching gas generator 83 ignites. Due to the gas pressure by the path switching gas generator 83, the gas passes through the gas flow path 107 of the switch housing 81, the switch piston 82 is pushed in the direction of the arrow x in FIG. 7, and the spindle ring 70 is also pushed by the switch piston 82. And shifted in the direction of the arrow x.
- a radial groove is formed in the bottom portion 83b of the cup 83a of the gas generator 83 so as to be easily broken during ignition (see FIG. 4).
- the force transmission path between the tread head 62 and the spindle 61 is in the order of the spindle 61, the second torsion bar 66, the first torsion bar 65, and the tread head 62.
- the first torsion bar 65 is thicker than the second torsion bar 66 and has a high twisting start load, the first torsion bar 65 does not twist and merely transmits force.
- the switching device 20 includes the path switching gas generator 83, the gas generator storage unit 106 that stores the gas generator 83, and the gas generator storage unit 106. And a switch housing 81 having a gas flow path 107 through which gas generated in the gas generator 83 passes, and the gas generator housing portion 106 and the gas flow path 107 of the switch housing 81 are formed to be bent.
- the punching hole 108 extending along the direction of the gas flow path 107 on the opposite side of the gas flow path 107 with respect to the gas generator housing portion 106 is blocked from the gas flow path 107 by the gas generator 83. Yes.
- the gas generator 83 for the switching device can be laid out at an optimal position, and the switch housing 81 is released by bending the gas flow path 107 and the gas generator storage portion 106.
- the hole 108 can be efficiently closed when the gas generator 83 is ignited without providing a separate lid or the like.
- the gas generation unit accommodating portion 106 extends horizontally in a state where the retractor 10 is attached to the vehicle, it is possible to prevent water or the like from entering the gas generation unit accommodating portion 106.
- the switch housing 81 is attached to the inside of the side plate 11a of the retractor frame 11, the moving area of the switching piston 82 is also inside the side plate 11a, and the retractor 10 can be made compact.
- the gas generator housing portion 106 is located above the switch housing 81 in a state where the retractor 10 is attached to the vehicle, and at a position avoiding interference with the webbing guided to the webbing guide hole 11e of the retractor frame 11.
- the retractor frame 11 is formed by notching the position facing the opening 106a of the gas generator housing portion 106, so that the connector 109 can be easily attached to the gas generator 83 while taking a compact configuration. Can do.
- the upper stay 11d is attached to the connecting portion 11c of the retractor frame 11 and the webbing guide hole 11e is provided in the upper stay 11d.
- the webbing guide hole 11e is not provided with the upper stay 11d. You may provide in the part extended 11 upwards. Further, in that case, a position facing the opening 106a of the gas generator housing portion 106 may be cut out in a portion extending above the retractor frame 11.
- the gas flow path can be formed by drilling a portion corresponding to a piece with a drill or the like by post-processing. Therefore, the hole extending along the direction of the gas flow path 107 on the opposite side of the gas flow path 107 with respect to the gas generator housing portion 106 is not limited to the die cutting hole 108 of the present embodiment.
- this invention is not limited to the thing of the said embodiment, An improvement or a deformation
- the switching device of the present embodiment is applied when the first and second torsion bars are used as an energy absorbing mechanism, but the seat belt retractor in which the pretensioner is coupled to the spindle via the torsion bar is used.
- the first torsion bar having a large shaft diameter may be used as a force transmission path when the pretensioner is operated, and the second torsion bar having a small shaft diameter may be used as an energy absorbing mechanism.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
Description
(1) リトラクタフレームと、
該リトラクタフレームに回転自在に支持され、ウェビングが巻装されるスピンドルと、 前記リトラクタフレームに回転自在に支持され、且つ、緊急時には前記リトラクタフレームに固定されるロック部材と、
前記スピンドルと前記ロック部材との間の力伝達経路に配置され、捻れトルクの異なる複数の軸部分を有するトーションバーと、
前記力伝達経路となる前記トーションバーの複数の軸部分を切り替える切替え装置と、を有し、
該切替え装置は、経路切替え用ガス発生器と、該ガス発生器を収納するガス発生器収納部、及び該ガス発生器収納部と連通し、前記ガス発生器で発生するガスが通過するガス流路を有するスイッチハウジングと、を備え、
該スイッチハウジングのガス発生器収納部とガス流路とは屈曲して形成されており、
前記ガス発生器収納部に対して前記ガス流路と反対側に前記ガス流路の方向に沿って延びる孔は、前記ガス発生器によって前記ガス流路から遮られていることを特徴とするシートベルト用リトラクタ。
(2) 前記ガス発生部収納部は、前記リトラクタが車両に取り付けられた状態において水平に延びることを特徴とする(1)に記載のシートベルト用リトラクタ。
(3) 前記スイッチハウジングは、リトラクタフレームの側板の内側に取り付けられることを特徴とする(1)または(2)に記載のシートベルト用リトラクタ。
(4) 前記ガス発生器収納部は、前記リトラクタが車両に取り付けられた状態において前記スイッチハウジングの上部で、且つ、前記リトラクタフレームのウェビング案内孔に案内されるウェビングとの干渉を避けた位置に配置され、
前記リトラクタフレームは、前記ガス発生器収納部の開口部と対向する位置を切り欠いて形成されることを特徴とする(3)に記載のシートベルト用リトラクタ。
(5) 前記ガス発生器収納部に対して前記ガス流路と反対側に前記ガス流路の方向に沿って延びる孔は、型抜きにより設けられる型抜き孔であることを特徴とする(1)~(4)のいずれかに記載のシートベルト用リトラクタ。
15 プリテンショナー
20 切替え装置
61 スピンドル
62 トレッドヘッド(ロック部材)
64 トルクチューブ
65 第1トーションバー
66 第2トーションバー
81 スイッチハウジング
82 スイッチピストン
83 ガス発生器
106 ガス発生器収納部
107 ガス流路
Claims (5)
- リトラクタフレームと、
該リトラクタフレームに回転自在に支持され、ウェビングが巻装されるスピンドルと、 前記リトラクタフレームに回転自在に支持され、且つ、緊急時には前記リトラクタフレームに固定されるロック部材と、
前記スピンドルと前記ロック部材との間の力伝達経路に配置され、捻れトルクの異なる複数の軸部分を有するトーションバーと、
前記力伝達経路となる前記トーションバーの複数の軸部分を切り替える切替え装置と、を有し、
該切替え装置は、経路切替え用ガス発生器と、該ガス発生器を収納するガス発生器収納部、及び該ガス発生器収納部と連通し、前記ガス発生器で発生するガスが通過するガス流路を有するスイッチハウジングと、を備え、
該スイッチハウジングのガス発生器収納部とガス流路とは屈曲して形成されており、
前記ガス発生器収納部に対して前記ガス流路と反対側に前記ガス流路の方向に沿って延びる孔は、前記ガス発生器によって前記ガス流路から遮られていることを特徴とするシートベルト用リトラクタ。 - 前記ガス発生部収納部は、前記リトラクタが車両に取り付けられた状態において水平に延びることを特徴とする請求項1に記載のシートベルト用リトラクタ。
- 前記スイッチハウジングは、前記リトラクタフレームの側板の内側に取り付けられることを特徴とする請求項1または2に記載のシートベルト用リトラクタ。
- 前記ガス発生器収納部は、前記リトラクタが車両に取り付けられた状態において前記スイッチハウジングの上部で、且つ、前記リトラクタフレームのウェビング案内孔に案内されるウェビングとの干渉を避けた位置に配置され、
前記リトラクタフレームは、前記ガス発生器収納部の開口部と対向する位置を切り欠いて形成されることを特徴とする請求項3に記載のシートベルト用リトラクタ。 - 前記ガス発生器収納部に対して前記ガス流路と反対側に前記ガス流路の方向に沿って延びる孔は、型抜きにより設けられる型抜き孔であることを特徴とする請求項1~4のいずれか1項に記載のシートベルト用リトラクタ。
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CN201080016432.1A CN102395491B (zh) | 2009-04-17 | 2010-03-31 | 安全带用卷收器 |
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Cited By (5)
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JP2012096745A (ja) * | 2010-11-05 | 2012-05-24 | Tokai Rika Co Ltd | ウェビング巻取装置 |
CN102689619A (zh) * | 2012-06-18 | 2012-09-26 | 黄绍勇 | 三点预紧汽车安全带装置 |
WO2016063634A1 (ja) * | 2014-10-22 | 2016-04-28 | オートリブ ディベロップメント エービー | シートベルトリトラクタ |
US10023150B2 (en) | 2013-11-25 | 2018-07-17 | Joyson Safety Systems Japan K.K. | Seat belt retractor and seat belt apparatus provided with same |
CN111347994A (zh) * | 2018-12-24 | 2020-06-30 | 奥托立夫开发公司 | 安全带卷收装置及安全带组件 |
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US9718437B2 (en) * | 2012-08-27 | 2017-08-01 | Helia Technology (Shanghai) Co., Ltd | Winder, a torsion bar, a reel, end covers and a safety belt assembly used for a force limiting safety belt |
DE102014114140B4 (de) * | 2014-09-29 | 2017-01-05 | Autoliv Development Ab | Gurtaufroller mit zweiteiligem Strafferantriebsrad |
JP6702805B2 (ja) * | 2016-06-09 | 2020-06-03 | 株式会社東海理化電機製作所 | ウェビング巻取装置 |
US10399540B2 (en) * | 2017-03-28 | 2019-09-03 | Joyson Safety Systems Acquisition Llc | Seat belt retractor with energy absorbing mechanism |
US11014529B2 (en) | 2019-04-30 | 2021-05-25 | Joyson Safety Systems Acquisition Llc | Seat belt retractor |
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JP2008174049A (ja) * | 2007-01-17 | 2008-07-31 | Autoliv Development Ab | シートベルト用リトラクタ |
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Cited By (8)
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JP2012096745A (ja) * | 2010-11-05 | 2012-05-24 | Tokai Rika Co Ltd | ウェビング巻取装置 |
CN102689619A (zh) * | 2012-06-18 | 2012-09-26 | 黄绍勇 | 三点预紧汽车安全带装置 |
US10023150B2 (en) | 2013-11-25 | 2018-07-17 | Joyson Safety Systems Japan K.K. | Seat belt retractor and seat belt apparatus provided with same |
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CN111347994B (zh) * | 2018-12-24 | 2023-10-20 | 奥托立夫开发公司 | 安全带卷收装置及安全带组件 |
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CN102395491A (zh) | 2012-03-28 |
JPWO2010119778A1 (ja) | 2012-10-22 |
US8740125B2 (en) | 2014-06-03 |
JP5560385B2 (ja) | 2014-07-23 |
CN102395491B (zh) | 2014-01-15 |
US20120043407A1 (en) | 2012-02-23 |
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