WO2009081909A1 - Pré-tendeur pour siège de véhicule - Google Patents

Pré-tendeur pour siège de véhicule Download PDF

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Publication number
WO2009081909A1
WO2009081909A1 PCT/JP2008/073335 JP2008073335W WO2009081909A1 WO 2009081909 A1 WO2009081909 A1 WO 2009081909A1 JP 2008073335 W JP2008073335 W JP 2008073335W WO 2009081909 A1 WO2009081909 A1 WO 2009081909A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
cable
pretensioner
seat
piston
Prior art date
Application number
PCT/JP2008/073335
Other languages
English (en)
Japanese (ja)
Inventor
Eiji Masutani
Original Assignee
Ts Tech Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ts Tech Co., Ltd. filed Critical Ts Tech Co., Ltd.
Publication of WO2009081909A1 publication Critical patent/WO2009081909A1/fr

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    • 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
    • B60R22/4633—Linear actuators, e.g. comprising a piston moving along reel axis and rotating along its own axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/4207—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces
    • B60N2/4214—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal
    • B60N2/4221—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal due to impact coming from the front
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42727—Seats or parts thereof displaced during a crash involving substantially rigid displacement
    • B60N2/42754—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42727—Seats or parts thereof displaced during a crash involving substantially rigid displacement
    • B60N2/42754—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion
    • B60N2/42763—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion with anti-submarining systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42772—Seats or parts thereof displaced during a crash characterised by the triggering system
    • B60N2/42781—Seats or parts thereof displaced during a crash characterised by the triggering system mechanical triggering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42772—Seats or parts thereof displaced during a crash characterised by the triggering system
    • B60N2/4279—Seats or parts thereof displaced during a crash characterised by the triggering system electric or electronic triggering

Definitions

  • the present invention relates to an improvement of PCT / JP2008 / 052579 (hereinafter referred to as the previous invention), and when a large external force acts on the vehicle body due to a vehicle collision or the like, a movable member such as a seat bottom or a seat belt is moved.
  • the present invention relates to a pretensioner for protecting a seated person.
  • Patent Document 1 a seat belt pretensioner that quickly restrains a seated person by a seat belt by positively tensioning the seat belt at the time of a vehicle collision.
  • the pretensioner can restrain the seat occupant quickly and reduces undesired movement of the seat occupant.
  • an object of the present invention is to provide a pretensioner that overcomes the above problems.
  • Sectional drawing of a pretensioner Schematic which shows the movement state of the cylinder and piston of a pretensioner.
  • the perspective view of a seat pretensioner and a seat bottom frame The side view of the said seat bottom before a pretensioner act
  • Reference numeral 1 denotes a vehicle seat
  • 2 denotes a seat back of the vehicle seat
  • 3 denotes a seat bottom
  • 4 denotes a headrest provided on the upper portion of the seat back 2
  • 5 denotes a vehicle seat 1 It is a slide rail moved with respect to.
  • the vehicle seat 1 is provided with a pretensioner 10 that generates a large amount of gas with a gas generating agent and arbitrarily operates the movable member K of the vehicle seat.
  • the pretensioner 10 is provided with a piston 12 in a cylinder 11. One end of a wire cable 13 is connected to the piston 12, and the other end of the wire cable 13 is pulled out of the cylinder 11 from the insertion hole 15 of the guide portion 14 of the cylinder 11 and connected to an arbitrary locking portion T (FIG. 2). FIG. 9).
  • the wire cable 13 is constituted by a pair of the first cable 13A and the second cable 13B.
  • One end of either the first cable 13A or the second cable 13B is connected to the piston 12 side of the cylinder 11 provided with one pretensioner 10, and the other end of either the first cable 13A or the second cable 13B.
  • the cylinder 11 is movably attached to a predetermined fixed portion, and is configured such that the cylinder 11 and the piston 12 move in opposite directions by reaction forces.
  • the cylinder 11 is provided with a gas generator 16 for supplying a large amount of gas for moving the piston 12.
  • the configuration of the gas generator 16 is well known, and although not shown in the drawing, a gas generating agent is incorporated therein, a high pressure gas is generated by this gas generating agent, and the piston 12 is instantaneously moved by this gas pressure. To do.
  • the cylinder-side wire locking portion 17 has a cylindrical end piece 19 having a smaller diameter than the cylinder pipe 18 of the cylinder 11 and a predetermined length.
  • An annular groove 20 is formed on the outer peripheral surface of the end piece 19 over the entire circumference.
  • the end piece 19 is inserted into the end of the cylinder pipe 18, and the concave groove 20 and the end of the cylinder pipe 18 are overlapped and caulked and fixed.
  • Reference numeral 21 denotes a flange portion formed on the end piece 19.
  • a cable caulking portion 22 that protrudes outward in the axial direction of the cylinder 11 is provided on the outer end surface of the end piece 19.
  • the cable caulking part 22 is formed in a cylindrical shape with an open end, and the end of the wire cable 13 is inserted into the cable caulking part 22 and fixed.
  • a plurality of concentric air holes 23 are formed around the cable caulking portion 22 of the end piece 19 of the cylinder side wire locking portion 17 so as to penetrate in the axial direction of the cylinder 11.
  • the vent hole 23 relieves the back pressure generated in the cylinder 11 on the opposite side of the piston 12 that is moved by the gas pressure of the gas generator 16.
  • the configuration of the gas generator 16 is arbitrary. In the embodiment shown in FIGS. 2 to 3, the gas generator 16 is provided outside the cylinder 11.
  • the gas generator 16 is provided in the cylinder 11. Specifically, the gas generator 16 is provided on the piston 12.
  • the piston 12 has a large-diameter portion 26 that is in sliding contact with the inner periphery of the cylinder 11.
  • a cable fixing portion 27 for locking the wire cable 13 is formed on one side of the large diameter portion 26.
  • a part of the large-diameter portion 26 on the opposite side of the cable fixing portion 27 is formed in a cylindrical shape, and a micro gas generator (MGG) 28 is densely inserted into the large-diameter portion 26 from the other side of the large-diameter portion 26 (see FIG. 7 and 9, the micro gas generator 28 is displayed with fine dots for easy understanding, but the configuration is not limited thereby.
  • MMGG micro gas generator
  • a part of the micro gas generator 28 is formed in a columnar shape, and the outer diameter of the columnar portion of the micro gas generator 28 and the inner diameter of the large diameter portion 26 are set so that they can be inserted into each other and in close contact with each other.
  • the piston 12 forms a gas outlet 29 on one side of the large diameter portion 26, and the other side of the large diameter portion 26 is closed by a columnar portion of the micro gas generator 28.
  • a cap 30 for retaining the micro gas generator (MGG) 28 is attached to the other side of the large diameter portion 26.
  • the cap 30 of the embodiment is screwed into the large diameter portion 26.
  • a through hole 31 is formed in the cap 30, and a coupler 32 is connected to the micro gas generator 28 from the portion of the through hole 31.
  • the harness 33 connected to the coupler 32 is connected to an impact detection device 34 provided at a desired position on the vehicle body.
  • the impact detection device 34 detects an impact, the micro gas generator 28 is operated to generate a large amount of gas, and this large amount of gas is filled into the cylinder 11 from the gas outlet 29, and instantaneously due to the gas pressure at this time.
  • the pretensioner 10 is actuated by moving the piston 12 and pulling the wire cable 13.
  • An O-ring 35 is provided on the large diameter portion 26 of the piston 12.
  • An inclined surface 37 is formed on the outer periphery of the cap 30 to be screwed into the large diameter portion 26 of the piston 12 and has a smaller diameter than the large diameter portion 26 and increases in diameter toward the cylinder side wire locking portion 17.
  • a steel ball 36 for a stopper that stops the return movement of the piston 12 is built in the space between the inner peripheral surface of 11.
  • the movable member K is a moving device for the seat bottom 3
  • the locking portion T is a fixed frame 46 described later
  • the pretensioner 10 is used as a seat pretensioner 10 ⁇ / b> A for the vehicle seat 1. An example is shown.
  • the seat pretensioner 10A When the seat pretensioner 10A detects an impact by the impact detection device 34 provided at a desired position on the vehicle body, the seat pretensioner 10A generates a large amount of gas by the gas generating agent of the gas generator 16, and the wire pressure is instantaneously generated by the gas pressure of the large amount of gas. 13 is pulled, and the seat back 2 is left as it is, independently of the seat belt 40, and only the seat bottom 3 is moved backward at the time of collision with the seat back 2 to improve the restraint of the seated person. is there.
  • the specific configuration of the seat pretensioner 10A is arbitrary, but as an example, the left and right anchor plates 41 of the seat belt 40 and the bases of the inner wrap anchors 42 are provided on the left and right upper rails 35 of the slide rail 5.
  • the left and right fixed frames 46 are attached to a pair of left and right fixed frames 46, and the seat bottom frame 51 of the seat bottom 3 is attached to the left and right fixed frames 46 so as to be movable backward within a predetermined range.
  • 47 is a belt retractor.
  • the fixed frame 46 is used as an engaging portion T, and the first cable 13A and the second cable 13B are engaged with the fixed frame 46 by engaging the base portions of the first cable 13A and the second cable 13B of the pair of left and right wire cables 13, respectively.
  • One end of 13B is connected to piston 12 provided in cylinder 11 of seat pretensioner 10A, and the other end of first cable 13A and second cable 13B is a cylinder-side wire of cylinder 11. It is inserted into the cable caulking portion 22 of the locking portion 17 and fixed by caulking.
  • the cylinder 11 of the seat pretensioner 10 ⁇ / b> A is positioned below the seat bottom frame 51 so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are substantially parallel to each other.
  • the cylinder 11 is configured to be movable in the direction, and even with one cylinder 11, the first cable 13A connected to the piston 12 and the second cable 13B connected to the cylinder 11 are substantially the same amount at the same time. When pulled, the wire cable 13 moves the seat bottom 3 backward.
  • vent hole 23 of the cylinder side wire locking portion 17 of the cylinder 11 releases the back pressure generated in the cylinder 11 on the opposite side of the piston 12 that is moved by the gas pressure of the gas generator 16. Smooth movement in the opposite direction of each.
  • rod-shaped attachment members 57 are formed on both front and rear side portions of the pair of left and right side members 55 of the seat bottom frame 51 to form a rod-shaped shape.
  • the attachment members 57 are respectively engaged with attachment holes 56 provided in the fixed frame 46 (FIG. 11).
  • the mounting holes 56 are formed in the left and right side portions of the pair of left and right side members 55 of the seat bottom frame 51, and the mounting holes 56 are provided in the fixed frame 46.
  • the front part of the seat bottom frame 51 is attached to the upper part of the arm 58 by a shaft 59 so that the front part of the seat bottom frame 51 can rotate freely. Is rotatably attached to the fixed frame 46 by a shaft 60. Therefore, at the time of collision, the front end of the seat bottom 3 can be raised while moving back, and the restraining effect of the seated person by the seat belt 40 can be further improved, which is preferable.
  • 61 is a cable guide that converts the moving direction of the wire cable 13 in the left-right direction by the piston 12 and the cylinder 11 into the front-rear direction that is the moving direction of the seat bottom 3
  • 62 is a cushioning material for the seat bottom 3
  • 63 is a skin member.
  • the movable member K is a seat belt tensioning device that tensions the entire tension of the seat belt 40, the left and right anchor plates 41 and the inner wrap anchor 42 are locking portions T, and a belt pretensioner 10B that tensions the seat belt 40 is provided.
  • the pretensioner 10 further improves the restraining effect of the seated person on the vehicle seat 1.
  • first cable 13A and the second cable 13B of the pair of left and right wire cables 13 are locked to the bases (locking parts T) of the left and right anchor plates 41 and the inner wrap anchors 42, respectively.
  • One end of the first cable 13 ⁇ / b> A and the second cable 13 ⁇ / b> B of the wire cable 46 is locked to the piston 11.
  • the other end of the first cable 13A and the second cable 13B is inserted into the cable caulking portion 22 of the cylinder side wire locking portion 17 of the cylinder 11 of the belt pretensioner 10B and fixed by caulking.
  • the belt tensioner 10B When the belt pretensioner 10B detects an impact by the impact detection device 34 provided at a desired position on the vehicle body, the belt tensioner 10B pulls the wire cable 13 instantaneously with the gas pressure of the high-pressure gas by the gas generating agent, The occupant is constrained to the vehicle seat 1.
  • the belt pretensioner 10B is configured to pull the first cable 13A and the second cable 13B of the wire cable 13 by one cylinder 11 (piston 12).
  • the left and right anchor plates 41 and the inner wrap anchors 42 are pulled by the first cable 13 ⁇ / b> A and the second cable 13 ⁇ / b> B substantially simultaneously to restrain the occupant to the vehicle seat 1.
  • the cylinder 11 of the belt pretensioner 10B is positioned so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are parallel to the vehicle seat 1 or the vehicle body.
  • the cylinder 11 is installed so as to be movable only in the axial direction of the cylinder 11. That is, the piston 12 and the cylinder 11 are configured to move in opposite directions by causing the reaction force of the piston 12 that instantaneously moves due to a large amount of gas from the gas generator 16 to act on the cylinder 11 (FIG. 4).
  • the belt pretensioner 10B can also be constituted by a single cylinder 11, and pulls the first cable 13A connected to the piston 12 and the second cable 13B connected to the cylinder 11 at substantially the same amount.
  • the wire cable 13 restrains the occupant to the vehicle seat 1.
  • a vent hole 23 is also provided in the cylinder side wire locking portion 17 of the cylinder 11 of the belt pretensioner 10B to release the back pressure generated in the cylinder 11 on the opposite side of the piston 12 moving by the gas pressure of the gas generator 16, The piston 12 and the cylinder 11 are smoothly moved in opposite directions.
  • Reference numeral 65 denotes a tongue plate provided at an intermediate portion of the seat belt 40, and 66 denotes an inner buckle.
  • the shoulder belt 67 extends from the vicinity of the shoulder of the seated person on one end side of the belt retractor 47 to the tongue plate 65, and from the tongue plate 65 to the anchor plate 41.
  • the lap belt 68 Up to this is the lap belt 68.
  • 69 is a through anchor
  • 70 is a cable guide
  • 71 is a roller provided in the cable guide 70.
  • the belt retractor 47 has a publicly known configuration and normally allows the seat belt 40 to be pulled out, but it only needs to incorporate a mechanism that locks the seat belt 40 when the impact is applied.
  • the tongue plate 65 is also a known configuration and is movable with respect to the seat belt 40, but is configured so as not to move with respect to the seat belt 40 when the normal seat belt 40 is pulled out.
  • the pretensioner 10 serving as the seat pretensioner 10 ⁇ / b> A and the belt pretensioner 10 ⁇ / b> B generates a large amount of gas from the micro gas generator 28 when the impact detection device 34 detects an impact, and the cylinder 11 on one side of the piston 12.
  • the piston 12 is instantaneously moved by the gas pressure, and the reaction force of the movement of the piston 12 acts on the cylinder 11 so that the piston 12 and the cylinder 11 move in directions opposite to each other.
  • the pretensioner 10 includes a movable member K that restrains a seated person by pulling the first cable 13A and the second cable 13B of the wire cable 13 that are respectively locked to the locking portion T by the piston 12 and the cylinder 11. Actuate and restrain the occupant.
  • a cylinder-side wire locking portion 17 is provided at the end of the cylinder 11 on the moving direction side of the piston 12, and the cylinder-side wire locking portion 17 is an outer peripheral surface of a columnar end piece 19 having a predetermined length.
  • the end of the cylinder pipe 18 of the cylinder 11 is caulked and fixed to the groove 20, and the end piece 19 protrudes in the axial direction of the cylinder 11 to open the tip. Since the cylindrical caulking portion 22 is provided, the end portion of the wire cable 13 is inserted into the caulking portion 22 and fixed.
  • the flange portion 21 is formed in the end piece 19 of the cylinder side wire locking portion 17, when the end piece 19 of the cylinder side wire locking portion 17 is inserted into the cylinder pipe 18 of the cylinder 11, the flange portion 21 becomes the cylinder.
  • the cylinder pipe 18 is crimped in this state when it hits the end surface of the pipe 18, the end of the cylinder pipe 18 is fitted into the groove 20, and the cylinder pipe 18 and the cylinder side wire locking portion 17 are firmly fixed. And fixing work is easy.
  • the end piece 19 of the cylinder side wire locking portion 17 is provided with a cable caulking portion 22 protruding in the axial direction of the cylinder 11, and the cable caulking portion 22 is formed in a cylindrical shape with an open end.
  • the end piece 19 of the cylinder side wire locking portion 17 around the cable caulking portion 22 is provided with a plurality of concentric vent holes 23 penetrating in the axial direction of the cylinder 11.
  • the seat belt 40 restrains the seat occupant.
  • the cushion material (pad) of the seat bottom 3 is bent due to the inertia force of the seat occupant accompanying deceleration, and the seat belt 40 is slackened and stretched.
  • the pretensioner tried to restrain the seat belt by pulling it at the time of collision. Since only one of the two sides is pulled, there is a limit in improving the restraining effect by further increasing the rise of the restraining force.
  • the movable member K is used as a moving device for the seat bottom 3
  • the locking portion T is used as a fixed frame 46
  • the pretensioner 10 is used as a seat pretensioner 10A for a vehicle seat 1.
  • the tensioner 10A the seat back 2 of the vehicle seat 1 is left as it is, independently of the seat belt 40, and only the seat bottom 3 is instantaneously moved backward when a collision with the fixed frame 46 (slide rail 5) is detected.
  • the seat bottom 3 is moved backward while actively increasing the reaction force of the cushioning material 62 by positively generating the deflection of the cushioning material 62 instantly.
  • the restraint effect on the vehicle seat 1 of the seated person can be reduced by shortening the rise of the restraining force and reducing the movement amount of the seated person.
  • the seat surface of the seat bottom 3 that moves backward supports the seated person and improves the restraining effect of the seated person on the vehicle seat 1.
  • a pair of left and right side members 55 of the seat bottom frame 51 of the seat bottom 3 is provided with a rod-shaped attachment member 57 (attachment hole 56), and the attachment member 57 is provided with a long attachment hole 56 (attachment) at the front and rear provided in the fixed frame 46. Since the member 57) is inserted so as to be relatively movable, the seat bottom frame 51 moves the seat bottom frame 51 backward relative to the fixed frame 46. Therefore, the seat bottom 3 more reliably supports the seat occupant by the rearward movement of the seat bottom 3 and improves the restraining effect of the seat occupant on the vehicle seat 1.
  • the front portion of the seat bottom frame 51 is mounted up and down freely by the arm 58, when the seat bottom 3 retracts at the time of collision, it can be retracted while raising the front end of the seat bottom 3, It is preferable that the seating surface of the seat bottom 3 below the user's buttocks becomes higher, and the reaction force of the cushioning material 62 can be further increased and the restraining effect of the seated person by the seat belt 40 can be further improved.
  • the rear portions of the side members 55 of the seat bottom frame 51 of the seat bottom 3 are engaged with the respective base portions of the first cable 13A and the second cable 13B of the pair of left and right wire cables 13, respectively.
  • One end of either the first cable 13A or the second cable 13B is connected to the piston 12 side provided in the cylinder 11 of the seat pretensioner 10A, and the other end of either the first cable 13A or the second cable 13B.
  • the cylinder 11 of the seat pretensioner 10 ⁇ / b> A is positioned so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are parallel to the vehicle seat 1, and is movable only in the direction of the axis of the cylinder 11. Since the cylinder 11 is installed, the reaction force of the piston 12 moved by the gas of the gas generator 16 acts on the movable cylinder 11, and the piston 12 and the cylinder 11 move in opposite directions.
  • the first cable 13 ⁇ / b> A connected to the piston 12 and the second cable 13 ⁇ / b> B connected to the cylinder 11 can be pulled at substantially the same amount at the same time to move the seat bottom frame 51 backward, and the configuration of the seat occupant restraint mechanism The number of parts can be reduced and provided at low cost.
  • a cylinder-side wire locking portion 17 is provided at the end of the cylinder 11 on the moving direction side of the piston 12 of the seat pretensioner 10A, and the cylinder-side wire locking portion 17 has a cylindrical end having a predetermined length. Since the annular groove 20 is formed on the outer peripheral surface of the piece 19, when the end of the cylinder pipe 18 of the cylinder 11 is caulked and fixed to the groove 20, the cylinder side wire locking of the seat pretensioner 10A is performed. The part 17 can be fixed easily.
  • the end piece 19 of the cylinder side wire locking portion 17 of the cylinder 11 of the seat pretensioner 10 ⁇ / b> A is provided with a cylindrical cable caulking portion 22 having an open end projecting in the axial direction of the cylinder 11, and the cable caulking portion 22. Since the end of the wire cable 13 is inserted and fixed by caulking, the wire cable 13 is reliably pulled by the movement of the cylinder 11 due to the reaction force of the movement of the piston 12 of the seat pretensioner 10A. The operation of the restraint sheet pretensioner 10A is ensured.
  • the end piece 19 of the cylinder side wire locking portion 17 around the cable caulking portion 22 of the cylinder 11 of the seat pretensioner 10A is provided with a plurality of concentric vent holes 23 penetrating in the axial direction of the cylinder 11. Therefore, when the piston 12 is moved by the gas pressure of the gas generator 16, the back pressure generated in the cylinder 11 on the moving direction side of the piston 12 is released from the vent hole 23 to the outside of the cylinder 11, and the back pressure is effectively reduced. Therefore, the movement of the piston 12 is made smooth, and the movement of the cylinder 11 by the reaction force of the piston 12 is also made smooth. Therefore, when both the cylinder 11 and the piston 12 move and the seat pretensioner 10 ⁇ / b> A is constituted by one cylinder 11, in particular, a rational configuration that can be effectively operated with a stable operation. Can be.
  • the cylinder 11 is arranged below the front lower surface of the seat bottom frame 51 of the seat bottom 3, and the axial center direction of the cylinder 11 is arranged in the left-right direction.
  • the seater restraint mechanism can be installed without sacrificing the legability of the seated person seated on the vehicle seat 1 behind 1, and on the other hand, the operation of the seat pretensioner 10A can be performed reliably and reliably.
  • the movable member K is a seat belt tensioning device that tensions the entire tension of the seat belt 40, the anchor plate 41 or the inner wrap anchor 42 is the locking portion T, and the belt pretensioner 10B that tensions the seat belt 40 is provided.
  • the pretensioner 10 is used to further improve the restraining effect of the seated person on the vehicle seat 1.
  • the seat belt 40 is configured to be pulled by both the left and right anchor plates 41 or the inner wrap anchors 42 by the belt pretensioner 10B to tension the entire tension of the seatbelt 40, and the belt pretensioner 10B
  • the wire cable 13 is instantaneously pulled by the gas pressure of a large amount of high-pressure gas by the gas generating agent, the seat belt 40 is tensioned, and the occupant is attached to the vehicle seat 1. to bound.
  • One of the first cable 13A and the second cable 13B of the wire cable 13 is connected to the piston 12 provided in the cylinder 11 of the belt pretensioner 10B, and the other of the first cable 13A and the second cable 13B. Is connected to the cable caulking portion 22 of the cylinder side wire locking portion 17 of the cylinder 11, so that the left and right anchor plates 41 and the inner wrap anchors 42 are pulled substantially simultaneously by one cylinder 11 of the belt pretensioner 10B. The passenger is restrained to the vehicle seat 1.
  • the cylinder 11 of the belt pretensioner 10B is positioned so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are parallel to the vehicle seat 1 or the vehicle body, and in the axis direction of the cylinder 11. Since the cylinder 11 is installed only movably, the reaction force of the piston 12, which is instantaneously moved by a large amount of gas from the gas generator 16, acts on the cylinder 11, and the piston 12 and the cylinder 11 move in opposite directions. To do.
  • each of the first cable 13A and the second cable 13B pulls the left and right anchor plates 41 and inner wrap anchors 42 substantially simultaneously, and restrains the occupant to the vehicle seat 1.
  • the end piece 19 of the cylinder side wire locking portion 17 around the cable caulking portion 22 of the cylinder 11 of the belt pretensioner 10B is provided with a plurality of concentric vent holes 23 penetrating in the axial direction of the cylinder 11. Therefore, when the piston 12 is moved by the gas pressure of the gas generator 16, the back pressure generated in the cylinder 11 on the moving direction side of the piston 12 is released from the vent hole 23 to the outside of the cylinder 11, and the back pressure is effectively reduced. Therefore, the movement of the piston 12 is made smooth, and the movement of the cylinder 11 by the reaction force of the piston 12 is also made smooth.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Seats For Vehicles (AREA)

Abstract

L'invention porte sur un pré-tendeur qui comporte un cylindre (11) auquel un premier câble est relié ; un piston (12) se déplaçant dans le cylindre (11) et auquel est relié un second câble ; et un générateur de gaz (16) destiné à distribuer du gaz dans une chambre de détente du cylindre (11) pour déplacer le piston (12) dans une première direction et déplacer le cylindre (11) dans une seconde direction. Le cylindre (11) comporte une partie d'engagement de fil (17). La partie d'engagement de fil (17) comporte une partie d'agrafage de câble tubulaire (22) se projetant dans la direction de l'axe du cylindre (11) et dont la tête présente une ouverture. Une extrémité du premier câble est introduite et fixée à la partie d'agrafage de câble.
PCT/JP2008/073335 2007-12-21 2008-12-22 Pré-tendeur pour siège de véhicule WO2009081909A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-331154 2007-12-21
JP2007331154A JP5170631B2 (ja) 2007-12-21 2007-12-21 車両用シート

Publications (1)

Publication Number Publication Date
WO2009081909A1 true WO2009081909A1 (fr) 2009-07-02

Family

ID=40801210

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/073335 WO2009081909A1 (fr) 2007-12-21 2008-12-22 Pré-tendeur pour siège de véhicule

Country Status (2)

Country Link
JP (1) JP5170631B2 (fr)
WO (1) WO2009081909A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007210352A (ja) * 2006-02-06 2007-08-23 T S Tec Kk 車両用シート

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007210352A (ja) * 2006-02-06 2007-08-23 T S Tec Kk 車両用シート

Also Published As

Publication number Publication date
JP5170631B2 (ja) 2013-03-27
JP2009149269A (ja) 2009-07-09

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