JP5502461B2 - Pretensioner mechanism used in seat belt device - Google Patents

Pretensioner mechanism used in seat belt device Download PDF

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JP5502461B2
JP5502461B2 JP2009295955A JP2009295955A JP5502461B2 JP 5502461 B2 JP5502461 B2 JP 5502461B2 JP 2009295955 A JP2009295955 A JP 2009295955A JP 2009295955 A JP2009295955 A JP 2009295955A JP 5502461 B2 JP5502461 B2 JP 5502461B2
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Prior art keywords
vehicle
seat
side frame
pretensioner mechanism
provided
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Expired - Fee Related
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JP2009295955A
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JP2011136591A (en
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英二 増谷
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テイ・エス テック株式会社
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Description

  The present invention relates to a seat belt device that protects an occupant in a vehicle seat, and more particularly to a pretensioner mechanism used in a seat belt device that increases the restraint of the occupant during a vehicle collision.

  2. Description of the Related Art In recent years, a seat belt device applied to a vehicle such as an automobile is provided with a pretensioner mechanism that winds up the slack of the seat belt and restrains and protects the occupant when the vehicle collides. In such a pretensioner mechanism, for example, one end portion of the seat belt is provided on the vehicle body side via the pretensioner mechanism, and the other end portion of the seat belt is guided to the inside of the center pillar in the vehicle. Connected to the pretensioner mechanism.

  At the time of a vehicle collision, tension is applied to the one end portion and the other end portion of the seat belt in directions away from the two pretensioner mechanisms, and the occupant is restrained by the tensioned seat belt (for example, Patent Documents). 1).

JP 2004-359028 A

  When the pretensioner mechanism as described above is provided on the vehicle body side that is the side of the vehicle seat, for example, it is necessary to perform assembly work so as to match the positioning hole provided on the vehicle body side, which is complicated. However, there are problems that the number of assembling steps increases and the assembling property decreases.

  Therefore, in view of the problems described above, for example, it is assumed that the pretensioner mechanism is provided on the side of the vehicle seat facing the vehicle body instead of being provided on the vehicle body side. However, an angle adjustment lever for adjusting the angle of the seat back that supports the back of the occupant, a seat surface adjustment lever for adjusting the height of the seat surface, etc. Therefore, the installation space of the pretensioner mechanism is limited. On the other hand, when the pretensioner mechanism is to be installed, there is a problem that the size of the vehicle seat is increased.

  The present invention has been made in consideration of the above-mentioned problems, can increase the degree of freedom of the mounting position in the vehicle interior, and can reduce the number of assembling steps and improve the assembling property. An object of the present invention is to provide a pretensioner mechanism used in a seat belt device.

In order to achieve the above object, the present invention provides a seatbelt device for restraining an occupant riding on a vehicle seat via a seatbelt, and pulling the seatbelt at the time of a vehicle collision to exert a restraining force on the occupant. A pretensioner mechanism to enhance,
The pretensioner mechanism includes a cable having one end connected to the seat belt;
Tensile force generating means connected to the other end of the cable, applying a thrust to the displacement body at the time of the vehicle collision and displacing it, and pulling the cable;
With
The tensile force generating means is provided in a concave portion provided in a side frame extending along the vehicle front and rear direction in the vehicle seat in the vehicle seat , and the cable includes the side frame. The vehicle seat is connected to an anchor plate provided on the outer side in the width direction of the vehicle via a guide mechanism provided on the vehicle (Claim 1).

  Further, it is preferable that the tensile force generating means is provided in a concave portion attached to the outer surface of the side frame and recessed in the width direction of the vehicle seat.

According to the first aspect of the present invention, the tensile force generating means for pulling the cable at the time of a vehicle collision is installed in the recess provided in the side frame extending along the front-rear direction of the vehicle in the vehicle seat. The tensile force generating means can be arranged in a compact manner, and the tensile force generating means is provided in a portion whose rigidity is increased by the recess, so that the cable is operated reliably and restrains the passenger through the seat belt. You can increase your power. In addition, compared with the case where the tensile force generating means is installed on the vehicle side, it is possible to pre-assemble one side portion of the vehicle seat, so that the assembling work can be simplified. Assembling performance can be improved and the number of assembling steps can be reduced. Furthermore, by installing the tensile force generation means in the recess, the width of the vehicle seat is not increased, and the vehicle seat can be made compact. Further, in the vehicle seat, a tensile force generating means is provided on the center side of the vehicle, and the cable is connected to an anchor plate provided on the outer side in the width direction of the vehicle via a guide mechanism provided on the side frame. The tensile force applied to the cable by the tensile force generating means is reliably transmitted to the seat belt via the anchor plate, and the seat belt can be pulled.

  According to the second aspect of the present invention, since the tensile force generating means is attached to the outer side surface of the side frame and is accommodated in the recess recessed in the width direction of the vehicle seat, the tensile force generating means is the side frame. As a result, the space on the vehicle central portion side in the vehicle seat is prevented from narrowing. Further, the tensile force generating means can be attached at a desired position by changing the position, size, etc. of the recess.

1 is a front view showing a vehicle seat to which a seat belt device including a pretensioner mechanism according to a first embodiment of the present invention is attached. FIG. 3 is a partially omitted perspective view of the vehicle seat shown in FIG. 1 as viewed from the rear end side of a first side frame portion. FIG. 2 is a partially omitted perspective view of the vehicle seat shown in FIG. 1 as viewed from the rear end side of a second side frame portion. It is the partially-omission perspective view which looked at the vehicle seat provided with the pretensioner mechanism which concerns on the 2nd Embodiment of this invention from diagonally back. It is sectional drawing along the VV line of FIG. It is the partially-omission perspective view which looked at the vehicle seat provided with the pretensioner mechanism which concerns on the 3rd Embodiment of this invention from diagonally back. It is sectional drawing along the VII-VII line of FIG.

  A preferred embodiment of a pretensioner mechanism used in a seat belt device according to the present invention will be described in detail below with reference to the accompanying drawings.

  FIG. 1 is a front view showing a vehicle seat provided with a seat belt device including a pretensioner mechanism according to a first embodiment of the present invention. In the following description, with respect to a vehicle seat, “left and right direction”, “left and right” or “seat width direction” indicate the directions of arrows A1 and A2 shown in FIG. The seat belt device 10 attached to the vehicle seat will be described.

  First, the vehicle seat 12 to which the seat belt device 10 is attached will be briefly described with reference to FIGS. 1 and 2. The vehicle seat 12 includes a seat cushion 14 that supports the occupant's buttocks and thighs, and a seat back 16 that is supported at the rear end of the seat cushion 14 so as to be tiltable and support the back of the occupant. A seat frame 22 fixed to a vehicle floor 18 via a pair of seat rails 20 is provided below the seat cushion 14.

  The seat frame 22 includes, for example, a pair of first and second side frame portions 24 and 26 provided in the seat width direction (arrow A1 and A2 directions), and front end portions of the first and second side frame portions 24 and 26. A main frame portion (front frame) (not shown) for joining the first and second side frame portions 24 and 26 to the rear end portions of the first side frame portion 24 and the second side frame. A member frame (rear frame) 28 is provided along the seat width direction (the directions of arrows A1 and A2) so as to connect the frame portion 26.

  In the vehicle seat 12, the first side frame portion 24 is provided on the vehicle body side (arrow A1 direction), and the second side frame portion 26 is provided on the passenger seat side (arrow A2 direction). A height lever 30 that can adjust the height of the seat cushion 14 and a reclining lever 32 that can adjust the inclination angle of the seat back 16 are provided from the front end portion to the middle portion of the first side frame portion 24.

  The second side frame portion 26 is formed with a mounting recess 35 that is recessed at a predetermined depth from the side surface 26a toward the first side frame portion 24 side (arrow A1 direction). The mounting recess 35 is formed with a predetermined length along the longitudinal direction (arrow B, C direction) of the second side frame portion 26. A part of a cylinder 46 constituting a pretensioner mechanism 44 described later is accommodated in the mounting recess 35 and fixed by mounting brackets 50a and 50b. At this time, about half of the cross-sectional shape of the cylinder 46 is accommodated in the mounting recess 35, and the other half protrudes outside the side surface 26 a of the second side frame portion 26.

  In addition, since the rigidity can be increased by providing the mounting recess 35 in the second side frame portion 26, the cylinder 46 can be reliably operated by providing the cylinder 46 in the mounting recess 35. Thus, the seat belt 36 can be pulled with a predetermined tensile force.

  That is, by providing the mounting recess 35 in the lower portion of the second side frame portion 26, the vehicle seat 12 can be prevented from being enlarged in the width direction when the pretensioner mechanism 44 is provided. 12 can be made compact.

  The member frame 28 is formed of, for example, a tubular body having both ends opened, and is provided substantially parallel to the floor 18 of the vehicle. One end of the member frame 28 penetrates the first side frame 24 and the other end is The second side frame portion 26 is fixed in a penetrating manner.

  Next, the seatbelt apparatus 10 attached to such a vehicle seat 12 will be described. The seat belt device 10 includes a seat belt 36 having one end housed in a center pillar 34 (see FIG. 1) in a vehicle, a tongue plate 38 provided in the middle of the seat belt 36, and the tongue plate 38 being attached and detached. An inner buckle 40 that is freely engaged, an anchor plate 42 that is connected to the other end of the seat belt 36, and a pretensioner mechanism 44 that is connected to the anchor plate 42 and can pull the seat belt 36. Including. Note that one end of the seat belt 36 is connected to a seat belt retractor (not shown) accommodated in the center pillar 34.

  Then, with the occupant sitting on the vehicle seat 12, the occupant pulls the seat belt 36 and inserts the tongue plate 38 into the inner buckle 40, whereby the tongue plate 38 and the inner buckle 40 are engaged. The occupant is restrained by the seat belt 36.

  As shown in FIGS. 1 to 3, the pretensioner mechanism 44 is, for example, a side surface 26 a of the second side frame portion 26 constituting the seat frame 22, that is, the passenger seat side in the vehicle seat 12 (arrow A <b> 2 direction). Provided with a bottomed cylindrical cylinder 46 and a wire cable 48 projecting outward from one end of the cylinder 46 and connected to the anchor plate 42.

  The cylinder 46 is provided substantially in parallel with the extending direction of the second side frame portion 26, and is fixed to the second side frame portion 26 via, for example, two mounting brackets 50a and 50b. A piston (displacement body) 52 that is displaceable along the axial direction is provided inside the cylinder 46, and one end of a wire cable 48 is connected to the center of the piston 52. The cylinder 46 is provided such that one end thereof is on the rear side (arrow B direction) in the vehicle seat 12 and the other end is on the front side (arrow C direction) in the vehicle seat 12.

  A supply port 54 that protrudes radially outward is formed on the outer periphery of one end of the cylinder 46, and the supply port 54 communicates with the inside of the cylinder 46. The supply port 54 is used as a supply port for supplying explosives into the cylinder 46. The supply port 54 is sealed when the cap 56 is attached.

  The explosive is supplied through the supply port 54 between the one end portion and the piston 52 inside the cylinder 46. For example, the explosive is generated by igniting and exploding the explosive by an ignition means (not shown) at the time of a vehicle collision. The piston 52 is urged and displaced toward the other end (direction of arrow C) of the cylinder 46 by the explosion gas. At that time, one end of the wire cable 48 connected to the piston 52 is pulled, and the other end of the seat belt 36 is pulled together with the anchor plate 42. That is, this cylinder 46 functions as a tensile force generating means for generating a tensile force applied in a predetermined direction to the wire cable 48 under the explosive action of explosives.

  The wire cable 48 is formed with a predetermined length capable of connecting the piston 52 constituting the cylinder 46 and the anchor plate 42, one end of which is connected to the piston 52 inside the cylinder 46, and the other end is anchored It is connected to the plate 42. The wire cable 48 is inserted through first and second guides 58 and 60 provided at the rear end portions of the first and second side frame portions 24 and 26 that constitute the vehicle seat 12.

  The first and second guides 58 and 60 are formed, for example, in a substantially L-shaped cross section, and have groove portions 58a and 60a into which the wire cable 48 is guided, respectively. One end of the first guide 58 is forward (arrow) along the side surface 26a of the second side frame portion 26, with an intermediate portion bent at a substantially right angle at the rear end portion of the second side frame portion 26 as a boundary. The other end portion extends in the seat width direction toward the first side frame portion 24 side (arrow A1 direction).

  The second guide 60 has one end directed toward the second side frame portion 26 (in the direction of arrow A2) with a middle portion bent at a substantially right angle at the rear end portion of the first side frame portion 24 as a boundary. The other end portion extends forward (in the direction of arrow C) along the side surface of the first side frame portion 24.

  That is, the first guide 58 guides the wire cable 48 protruding outward from one end portion of the cylinder 46 to the rear end portion of the second side frame portion 26, and then toward the first side frame portion 24 side in the seat width direction. The second guide 60 bends the wire cable 48 guided from the other end portion of the first guide 58 at the rear end portion of the first side frame portion 24, and then the first side frame portion. 24 is guided forward.

  In other words, the wire cable 48 extends from the cylinder 46 along the side surface 26a of the second side frame portion 26 under the guiding action of the first guide 58, and then at the rear end portion of the second side frame portion 26. The direction is changed in the seat width direction, the direction is changed again forward by the second guide 60, and then guided to the front side (arrow C direction) of the vehicle seat 12 along the first side frame portion 24. .

  A guide pulley 62 is rotatably provided in front of the second guide 60 in the first side frame portion 24, and the wire guide guided from the second guide 60 is an outer peripheral surface of the guide pulley 62. And is connected to the anchor plate 42.

  The guide pulley 62 and the first and second guides 58 and 60 described above function as a guide mechanism 64 that guides the wire cable 48 in a predetermined direction between the cylinder 46 and the anchor plate 42.

  The seat belt device 10 to which the pretensioner mechanism 44 according to the first embodiment of the present invention is applied is basically configured as described above. Next, the operation and effects thereof will be described. .

  First, for example, when a vehicle collision is detected by an impact sensor (not shown) or the like, explosives are ignited by an ignition means (not shown) in the cylinder 46 of the pretensioner mechanism 44 and explode. As a result, the piston 52 is urged and displaced toward the other end of the cylinder 46 (in the direction of arrow C) by the explosive gas generated by the explosion of the explosive, and one end of the wire cable 48 is displaced together with the piston 52. Thus, the anchor plate 42 is pulled downward via the wire cable 48 so as to be separated from the occupant.

  As a result, the tensioned seat belt 36 is in close contact with the vicinity of the occupant's waist and restrains the occupant between the seat cushion 14 and the occupant moves forward (in the direction of arrow C) when the vehicle collides. Definitely blocked.

  At this time, since the path of the wire cable 48 is reliably ensured and guided by the first and second guides 58 and 60 and the guide pulley 62, the wire cable 48 is operated stably to pull the seat belt 36. Is possible.

  Further, at the same time when the above-described pretensioner mechanism 44 is operated, one end portion side of the seat belt 36 is also pulled by a seat belt retractor (not shown) provided in the center pillar 34. The occupant is in close contact with the vicinity of the chest and is restrained between the occupant and the seat back 16.

  That is, at the time of a vehicle collision, one end and the other end of the seat belt 36 are pulled together, and the vicinity of the chest and the waist of the occupant are reliably restrained by the seat belt 36, respectively. Movement to is prevented.

  As described above, in the first embodiment, the cylinder 46 constituting the pretensioner mechanism 44 is provided on the passenger seat side in the vehicle seat 12, that is, on the side surface of the second side frame portion 26 that is the central portion side in the vehicle. By adopting the configuration provided in 26a, it is possible to avoid an installation space overlap with the reclining lever 32 and the like provided in the first side frame portion 24 of the vehicle seat 12. As a result, the cylinder 46 of the pretensioner mechanism 44 can be provided at a desired position on the passenger seat side of the vehicle seat 12.

  Further, since the pretensioner mechanism 44 can be assembled in advance to the vehicle seat 12 as compared with the case where the pretensioner mechanism 44 is installed on the vehicle side, the assembling work can be simplified. Can be improved and the number of assembly steps can be reduced.

  Furthermore, since the complicated work of positioning the pretensioner mechanism 44 with respect to the vehicle side is not necessary, it is possible to improve the assemblability.

  In the above-described first embodiment, the case where the pretensioner mechanism 44 including the cylinder 46 is provided in the vehicle seat 12 on the driver's seat side in the vehicle has been described. For example, the vehicle on the passenger seat side When it is provided on the seat, the cylinder is mounted on the side frame portion on the driver's seat side where no reclining lever or the like is provided.

  Next, a seat belt device 152 to which a pretensioner mechanism 150 according to a second embodiment is applied is shown in FIGS. The same components as those of the seat belt device 10 to which the pretensioner mechanism 44 according to the first embodiment is applied are denoted by the same reference numerals, and detailed description thereof is omitted.

  The pretensioner mechanism 150 according to the second embodiment is different from the first embodiment in that a cylinder 158 is accommodated in a mounting recess 156 provided in a second side frame portion 154 constituting the vehicle seat 12. This is different from the pretensioner mechanism 44 according to the embodiment.

  The mounting concave portion 156 is formed to be recessed with a predetermined depth toward the first side frame portion 24 side (arrow A1 direction) with respect to the side surface 154a of the second side frame portion 154, and the second side frame It is formed with a predetermined length along the longitudinal direction (arrow B, C direction) of the portion 154. The cylinder 158 is accommodated in the mounting recess 156 and fixed by the mounting brackets 50a and 50b. At this time, since the cylinder 158 does not protrude outward from the side surface 154a of the second side frame portion 154, the width dimension of the vehicle seat 12 including the second side frame portion 154 does not increase.

  That is, by providing the mounting recess 156 in the lower portion of the second side frame portion 154, the vehicle seat 12 is prevented from being enlarged in the width direction when the pretensioner mechanism 44 is provided. As a result, the vehicle seat 12 can be made compact.

  In addition, the wire cable 48 protruding outward from one end portion of the cylinder 158 is guided from the mounting recess 156 to the side surface 154a side of the second side frame portion 154, and the first and second guides 58 and 60 and the guide pulley 62 are provided. Then, it is connected to the anchor plate 42.

  In this case, the supply port 54 is formed in the cylinder 158 so as to protrude downward.

  As described above, in the second embodiment, when the cylinder 158 constituting the pretensioner mechanism 150 is provided on the side of the second side frame portion 26 of the vehicle seat on the passenger seat side, It is configured to be accommodated in a mounting recess 156 provided on the side frame portion and recessed toward the first side frame portion 24 side. Therefore, it is preferable that the cylinder 158 does not protrude sideways with respect to the second side frame portion 154. As a result, the space on the passenger seat side in the vehicle seat 12 is avoided from being narrowed, and the cylinder 158 can be mounted at a desired position by changing the position, size, etc. of the mounting recess 156. It becomes possible. That is, the degree of freedom of the mounting position can be increased by providing the cylinder 158 of the pretensioner mechanism 150 on the vehicle seat 12 side without being restricted on the vehicle side.

  The supply port 54 is connected to wiring for operating the cylinder 158. When the supply port 54 is provided in the lateral direction of the cylinder 158, the wiring of the vehicle seat 12 including the wiring is included. In order to increase the size in the width direction, the supply port 54 and the cap 56 may be provided in the lower portion of the cylinder 158. Thereby, since supply port 54 and cap 56 including wiring do not protrude to the side of cylinder 158, enlargement in the width direction of vehicle seat 12 can be avoided.

  Furthermore, since the rigidity can be increased by providing the mounting recess 156 in the second side frame portion 154, the cylinder 158 can be reliably operated by providing the cylinder 158 in the mounting recess 156. Thus, the seat belt 36 can be pulled with a predetermined tensile force.

  Next, a seat belt device 202 to which a pretensioner mechanism 200 according to a third embodiment is applied is shown in FIGS. The same components as those of the seat belt devices 10 and 152 to which the pretensioner mechanisms 44 and 150 according to the first and second embodiments described above are applied are denoted by the same reference numerals, and the detailed description thereof is omitted. Description is omitted.

  The pretensioner mechanism 200 according to the third embodiment is the first and second embodiments in that a cylinder 204 is accommodated inside the second side frame portion 26 constituting the vehicle seat 12. This is different from the pretensioner mechanisms 44 and 150 according to FIG.

  The cylinder 204 is accommodated at a position inside the second side frame portion 26 and is fixed to the inner wall surface 206 of the second side frame portion 26 with mounting brackets 50a and 50b. The second side frame portion 26 has mounting holes 207 cut out for mounting the mounting brackets 50a and 50b, respectively, and the mounting brackets 50a and 50b are formed in the inner wall surface 206 through the mounting holes 207. It is fixed against.

  A columnar guide body 208 that guides the wire cable 48 protruding from one end of the cylinder 204 is provided in the vicinity of the rear end of the second side frame portion 26. Then, after the wire cable 48 extending rearward from one end of the cylinder 204 is changed in the seat width direction (arrow A2 direction) along the outer peripheral surface of the guide body 208, the first side frame portion The direction is changed again to the front side (in the direction of arrow C) by another guide body (not shown) similarly provided at the rear end portion of 24 and connected to the anchor plate 42 via the guide pulley 62.

  As described above, in the third embodiment, the cylinder 204 constituting the pretensioner mechanism 200 is provided so as to be inside the second side frame portion 26 of the vehicle seat 12, so that the cylinder 204 is Since it does not protrude to the side of the two side frame portion 26, it is avoided that the space on the passenger seat side in the vehicle seat 12 is narrowed, and the interior of the seat frame 22 including the second side frame portion 26 is avoided. Since it can arrange | position using space, it can install easily in a desired position. That is, the degree of freedom of the mounting position can be increased by providing the cylinder 204 of the pretensioner mechanism 200 on the vehicle seat 12 side without being restricted on the vehicle side.

  The seat frame 22 including the second side frame portion 26 is preferably covered with the seat cushion 14 so that the cylinder 204 is not visually recognized from the outside of the vehicle seat 12.

  Of course, the pretensioner mechanism 44 used in the seat belt device according to the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10,152,202 ... Seat belt apparatus 12 ... Vehicle seat 14 ... Seat cushion 16 ... Seat back 22 ... Seat frame 24 ... 1st side frame part 26, 154 ... 2nd side frame part 35, 156 ... Recessed part 36 for attachment ... Seat belt 42 ... Anchor plates 44, 150, 200 ... Pretensioner mechanisms 46, 158, 204 ... Cylinder 48 ... Wire cable 52 ... Piston 58 ... First guide 60 ... Second guide 62 ... Guide pulley 208 ... Guide body

Claims (2)

  1. In a seatbelt device that restrains an occupant riding on a vehicle seat via a seatbelt, a pretensioner mechanism that pulls the seatbelt and increases the restraining force on the occupant during a vehicle collision,
    The pretensioner mechanism includes a cable having one end connected to the seat belt;
    Tensile force generating means connected to the other end of the cable, applying a thrust to the displacement body at the time of the vehicle collision and displacing it, and pulling the cable;
    With
    The tensile force generating means is provided in a concave portion provided in a side frame extending along the vehicle front and rear direction in the vehicle seat in the vehicle seat , and the cable includes the side frame. A pretensioner mechanism used in a seat belt device , wherein the vehicle seat is connected to an anchor plate provided on the outer side in the width direction of the vehicle via a guide mechanism provided on the vehicle .
  2. The pretensioner mechanism according to claim 1,
    The pretensioner mechanism used in a seat belt device, wherein the tensile force generating means is provided in a concave portion attached to an outer surface of the side frame and recessed in the width direction of the vehicle seat.
JP2009295955A 2009-12-25 2009-12-25 Pretensioner mechanism used in seat belt device Expired - Fee Related JP5502461B2 (en)

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Application Number Priority Date Filing Date Title
JP2009295955A JP5502461B2 (en) 2009-12-25 2009-12-25 Pretensioner mechanism used in seat belt device

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Application Number Priority Date Filing Date Title
JP2009295955A JP5502461B2 (en) 2009-12-25 2009-12-25 Pretensioner mechanism used in seat belt device

Publications (2)

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JP2011136591A JP2011136591A (en) 2011-07-14
JP5502461B2 true JP5502461B2 (en) 2014-05-28

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03227745A (en) * 1989-12-25 1991-10-08 Mazda Motor Corp Crew position control device
US5492368A (en) * 1995-02-23 1996-02-20 General Motors Corporation Rollover seat system
FR2772690B1 (en) * 1997-12-24 2000-02-18 Faure Bertrand Equipements Sa Seat of a motor vehicle seat comprising a crosspiece anti-submarining

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