WO2009081915A1 - Vehicle seat and method of assembling vehicle seat - Google Patents

Abstract

A vehicle seat has a cylinder to which a first cable (13A) is connected, a piston moving in the cylinder and to which a second cable (13B) is connected, a gas generator for supplying gas into an expansion chamber in the cylinder, moving the piston in a first direction, and moving the cylinder in a second direction opposite the first direction, and a connection means (57) fixed to a stationary frame (46) fixed to a vehicle body. A seat bottom frame (51) of the vehicle seat has a long mounting hole (56) to which the connection means is connected so as to be movable in the front-rear direction. Ends of the first and second cables are fixed to the connection means.

Description

Vehicle seat and vehicle seat assembly method

The present invention relates to an improvement of PCT / JP2008 / 052579 (hereinafter referred to as the previous invention), and a pretensioner that protects a seated person by moving a seat bottom when a large external force acts on a vehicle body due to a vehicle collision or the like. It is about.

Conventionally, a seat pretensioner has been developed that suppresses undesired movement of a seated person by moving the seat bottom with the output of a gas generator in the event of a vehicle collision.

Further, in the above-described invention, a pretensioner that can move two wire cables by an equal distance by an equal force with the output of one gas generator has been proposed.
JP 2003-146184 A

In the pretensioner of the previous invention, it was troublesome to fix the end of the wire cable extending from the pretensioner to the vehicle body.

Therefore, an object of the present invention is to provide a pretensioner that overcomes the above problems.

The perspective view of a vehicle seat. Sectional drawing of a pretensioner. Schematic which showed the movement state of the cylinder and piston of a pretensioner. Sectional drawing of another Example of a pretensioner. The perspective view of the piston of a pretensioner. Sectional drawing of a pretensioner. Schematic which showed the movement state of the cylinder and piston of a pretensioner. The perspective view of a seat pretensioner and a seat bottom frame. The perspective view of a seat pretensioner and a seat bottom frame. The side view of the said seat bottom before a pretensioner act | operates. The side view of the said seat bottom after the pretensioner act | operates. The schematic perspective view of a fixed frame and a seat bottom frame. The exploded perspective view of a guide and attachment member. The disassembled perspective view of a guide and attachment member, a fixed frame, and a seat bottom frame. The side view which showed the state when attaching a guide and attachment member to the attachment hole of a seat bottom frame. The side view which showed the state after attaching a guide and attachment member to the attachment hole of a seat bottom frame. The perspective view which shows the state of FIG. The perspective view which shows the state of FIG. The perspective view of the guide and attachment member of another Example. The perspective view before the assembly | attachment of the guide and attachment member of another Example with a seat bottom frame. The perspective view after the assembly | attachment of the guide and attachment member of another Example with a seat bottom frame.

An embodiment of the present invention will be described with reference to the drawings. 1 is a vehicle seat, 2 is a seat back of the vehicle seat 1, 3 is a seat bottom, 4 is a headrest provided on the upper portion of the seat back 2, and 5 is a vehicle seat 1 on the vehicle body. It is a slide rail that is moved relative to it.

A large amount of gas is generated in the vehicle seat 1 by a gas generating agent, the seat back 2 of the vehicle seat is left as it is, and the seat bottom 3 is moved backward at the time of collision with the seat back 2 to restrain the seated person. A sheet pretensioner 10 for improving the above is provided. The seat pretensioner 10 is provided with a piston 12 in one cylinder 11, and the piston 12 is connected and fixed to one end of one of the pair of the first cable 13 </ b> A and the second cable 13 </ b> B of the wire cable 13. The other end of the first cable 13A and the second cable 13B is connected to a cylinder-side wire locking portion 17 of the cylinder 11 on the opposite side of the guide portion 14. The cylinder 11 is movably attached to a predetermined fixing portion, and is configured such that the cylinder 11 and the piston 12 move in opposite directions by reaction forces.

That is, the reaction force of the piston 12 that instantaneously moves due to a large amount of gas generated by the gas generator 16 acts on the cylinder 11, and the piston 12 and the cylinder 11 move in opposite directions. Therefore, in the seat pretensioner 10, the first cable 13 </ b> A connected to the piston 12 and the second cable 13 </ b> B connected to the cylinder 11 are pulled by the same amount by the single cylinder 11, and the wire cable 13 moves the seat bottom 3 backward.

The cylinder-side wire locking portion 17 forms an annular groove 20 over the entire circumference of the cylindrical end piece 19 having a smaller diameter and a predetermined length than the cylinder pipe 18 of the cylinder 11. The end piece 19 is inserted into the end of the cylinder pipe 18, and the portion of the concave groove 20 and the end of the cylinder pipe 18 are 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 end face 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. Around the cable caulking portion 22 of the end piece 19 of the cylinder side wire locking portion 17, a plurality of air holes 23 that penetrate in the axial direction of the cylinder 11 are provided concentrically. 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 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 installation configuration of the gas generator 16 is arbitrary, and the gas generator 16 is provided outside the cylinder 11 in the embodiment of FIGS.

4 to 7, the gas generator 16 is provided in the cylinder 11. Specifically, the gas generator 16 is provided on the piston 12. The piston 12 forms a cable fixing portion 27 that locks the wire cable 13 on one side of the large diameter portion 26 that is in sliding contact with the inner periphery of the cylinder 11. The large-diameter portion 26 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 (in FIG. 4 and FIG. 6, for easy understanding). For this reason, the micro gas generator 28 is displayed with fine dots, but the configuration is not limited thereby).

Therefore, 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 cylinder 11 on 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. When the impact detection device 34 detects an impact, the micro gas generator 28 is operated to generate a large amount of gas. This gas is filled into the cylinder 11 on one side of the piston 12 from the gas outlet 29, and the piston 12 is instantaneously moved by the gas pressure at this time, and the wire cable 13 is pulled to move the seat bottom 3.

An O-ring 35 is provided on the large diameter portion 26 of the piston 12. An inclined surface 37 having a smaller diameter than the large diameter portion 26 is formed on the outer periphery of the cap 30 screwed into the large diameter portion 26 of the piston 12, and the piston 12 is disposed in a space between the inclined surface 37 and the inner peripheral surface of the cylinder 11. A stopper steel ball 36 for stopping the return movement is incorporated.

40 is a seat belt, and the left and right anchor plates 41 and the inner lap anchor 42 of the seat belt 40 are attached to a pair of left and right fixed frames 46 provided on the left and right upper rails 35 of the slide rail 5. 47 is a belt retractor. The seat bottom frame 51 of the seat bottom 3 is attached to the left and right fixed frames 46 so as to move backward within a predetermined range.

Although the specific movement configuration of the seat bottom 3 is arbitrary, for example, a long mounting hole 56 is formed in both sides of the pair of left and right side members 55 of the seat bottom frame 51 in the front-rear direction. The connecting means 57 is inserted into the hole 56 and the seat bottom frame 51 is attached to the fixed frame 46 so as to be movable backward.

The front part of the seat bottom frame 51 is pivotally attached to the upper part of the arm 58 by a shaft 59, and the lower part of the arm 58 is pivotally attached to the fixed frame 46 by a shaft 60. In this case, the seat bottom 3 is moved backward while being raised. 62 is a cushion material for the seat bottom 3, and 63 is a skin member.

The end portions of the first cable 13A and the second cable 13B of the wire cable 13 connected and fixed to the fixed frame 46 are respectively locked to the left and right connecting means 57. An example of the connecting means 57 includes a guide locking portion 70 and a bolt 72 that is screwed into a screw hole 71 of the guide locking portion 70. The guide locking portion 70 has a pin portion 73 that is movable in a front-rear mounting hole 56 provided in the seat bottom frame 51. An outer deformed portion 74 having a width wider than the mounting hole 56 is provided outside the pin portion 73. An inner deformed portion 75 is provided inside the pin portion 73.

The outer deformed portion 74 is formed in a substantially circular cylindrical shape. The inner deformed portion 75 can pass through the attachment hole 56 in a predetermined direction, but is formed in a shape that does not come out of the attachment hole 56 after the attachment of the wire cable 13 is completed. In the embodiment, the inner deformed portion 75 is formed in a substantially oval shape.

The screw hole 71 of the guide locking part 70 is formed through the pin part 73, the outer deformed part 74 and the inner deformed part 75. Bolts 72 are screwed into the insertion holes 77 of the fixed frame 46 from the outside into the screw holes 71 of the guide locking portions 70, and the seat bottom frame 51 is movably attached to the fixed frame 46.

The outer deformed portion 74 is provided with a cable caulking portion 78 for fixing the end portion of the wire cable 13. The cable caulking portion 78 is formed by a long cylindrical member substantially parallel to the side member 55 of the seat bottom frame 51. The cable caulking portion 78 has its base fixed to the outer deformed portion 74, and its tip is opened. The end of the wire cable 13 is inserted into the tip of the cable crimping portion 78, and the outer periphery of the cable crimping portion 78 is tightened and fixed.

Therefore, the end portion of the wire cable 13 is fixed to the fixed frame 46 by the cable caulking portion 78 of the guide locking portion 70 of the connecting means 57, and when the sheet pretensioner 10 is actuated and the wire cable 13 is pulled, the connection is performed. The seat bottom frame 51 of the seat bottom 3 is moved rearward by being guided by the pin portion 73 of the guide locking portion 70 of the means 57 and the mounting hole 56.

Therefore, the connecting means 57 can be used both as a connecting member for the seat bottom frame 51 and the fixed frame 46 and a locking member for the wire cable 13, simplifying the configuration, and providing a rational configuration. In this case, before the seat pretensioner 10 is actuated, the pin portion 73 of the guide locking portion 70 of the connecting means 57 is positioned substantially in contact with the inner edge of the rear portion of the mounting hole 56. When the insertion hole 77 of the fixed frame 46 is matched, positioning when the bolt 72 is screwed into the guide locking portion 70 is facilitated, and assembly work is facilitated.

That is, when the pin portion 73 of the guide locking portion 70 is positioned at the rearmost portion in the mounting hole 56 of the seat bottom frame 51, the insertion hole 77 of the fixed frame 46 and the screw hole 71 of the guide locking portion 70 coincide. Thus, the length of the wire cable 13 and the relative positional relationship between the insertion hole 77 of the fixed frame 46 and the screw hole 71 of the guide locking part 70 are configured.

19 to 21 show another embodiment of the guide locking portion 70, and a fitting portion 80 is formed on the outer surface of the outer deformed portion 74 so as to protrude outward. The fitting portion 80 is formed in an obliquely substantially triangular prism shape (V shape) that bulges outward and is inclined downward. A receiving member 81 is provided around the insertion hole 77 on the inner surface of the fixed frame 46. The receiving member 81 bulges inward from the fixed frame 46 to form a fitting recess 82 into which the fitting portion 80 is fitted.

The fitting recess 82 and the fitting portion 80 are arranged so that when the fitting portion 80 is fitted into the fitting recess 82, the insertion hole 77 of the fixed frame 46 and the screw hole 71 of the guide locking portion 70 coincide with each other. Constitute. Therefore, the guide hole 70 is temporarily assembled to the seat bottom frame 51 by passing the mounting hole 56 in the direction of the inner deformed portion 75 of the guide lock portion 70, and the pin portion 73 of the guide lock portion 70 is attached. When the fitting portion 80 of the guide locking portion 70 of the seat bottom frame 51 is fitted to the fitting recess 82 of the receiving member 81 together with the seat bottom frame 51 in this state, the guide hole is moved. The locking portion 70 can temporarily fix the seat bottom frame 51 to the fixed frame 46. Next, when the bolt 72 is screwed into the guide locking portion 70 from the outside into the insertion hole 77 of the fixed frame 46, the locking to the fixed frame 46 is achieved. The attachment of the seat bottom frame 51 and the locking operation of the end portion of the wire cable 13 are completed.

The seat pretensioner 10 is operated by pulling the wire cable 13 by one cylinder 11, and the cylinder 11 has a pulling direction of the wire cable 13 and an axis of the cylinder 11 at a lower position on the front side of the seat bottom frame 51. Are arranged so as to be substantially parallel to each other and are installed so as to be movable in the axial direction of the cylinder 11, the seat pretensioner 10 for moving the seat bottom 3 backward can be constituted by one cylinder 11. Is preferable.

In this case, the piston 12 and the cylinder 11 are pulled in the left-right direction at an intermediate position between the first cable 13A and the second cable 13B of the wire cable 13 locked to the left and right fixed frames 51 and the cylinder 11 and the piston 12, respectively. The cable guide 61 is provided to change the moving direction of the first cable 13A and the second cable 13B in the front-rear direction so that the seat bottom 3 moves rearward (FIGS. 8 and 9).

The left and right cable guides 61 are attached to the seat bottom frame 51 of the seat bottom 3, and a reinforcing frame 90 is provided between the left and right cable guides 61 to prevent the distance between the left and right cable guides 61 from becoming narrow. Further, the reinforcing frame 90 may constitute a part of the seat bottom frame 51. The cylinder 11 is formed to be shorter than the left and right width of the seat bottom 3, and the cable guide 61 is provided below the seat bottom 3 on both the left and right sides of the cylinder 11. Further, when the cylinder 11 is suspended between the left and right cable guides 61 by the pair of the first cable 13A and the second cable 13B of the wire cable 13, the cylinder 11 is supported by the wire cable 13. Reference numeral 65 denotes a tongue plate provided at an intermediate portion of the seat belt 40, and 66 denotes an inner buckle.

In the seat belt 40, when the tongue plate 65 is engaged with the inner buckle 66, 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. Up to this is the lap belt 68. 69 is a through anchor.

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.

(Operation of Example)
When the vehicle is collided from the front while traveling on the vehicle seat 1, the vehicle body is prevented from moving forward due to the collision and immediately decelerates, so that the inertial force moves the seated person relative to the vehicle seat 1. However, since the seat belt 40 is provided, the seated person is restrained by the vehicle seat 1.

However, the seat belt 40 restrains the occupant, but the cushioning material (pad) of the seat bottom 3 is bent due to the inertial force of the occupant accompanying deceleration, or the seat belt 40 is slackened and stretched. In recent years, there has been a limit to improving the restraining effect of the seat belt 40, and in recent years, 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.

Therefore, the device for restraining the seated person is a moving device for the seat bottom 3, and the seat back 2 of the vehicle seat 1 is left as it is and independent of the seat belt 40 by the seat pretensioner 10A of the moving device for the seat bottom 3. When the collision of the seat bottom 3 with the fixed frame 46 (slide rail 5) is detected, the seat is instantaneously moved backward, and the cushion is instantly cushioned before the seated person sinks and moves forward from the seated state of the vehicle seat 1. The seat bottom 3 is moved backward while positively generating the bending of the material 62 to increase the reaction force of the cushion material 62, the rise of the restraining force is accelerated, the amount of movement of the seated person is reduced, and the seated person's vehicle The restraining effect on the sheet 1 is improved. That is, 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.

In this case, only the seat bottom 3 of the vehicle seat 1 is retracted and the seat back 2 is not moved backward, so that the volume occupied by the rear space of the vehicle seat 1 can be minimized, and the vehicle seat moved backward to the rear seat occupant Secondary damage that 1 collides can also be prevented.

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 seating surface of the seat bottom 3 that moves rearward of the seat bottom 3 supports the seat occupant more reliably and improves the restraining effect of the seat occupant on the vehicle seat 1.

In this case, since 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 fixed frame 46 is connected and fixed to the ends of the pair of first cables 13A and second cables 13B of the wire cable 13 connected to the cylinder 11 and the piston 12 of the seat pretensioner 10, respectively. Since the guide locking portion 70 of the connecting means 57 is fixed to the ends of the pair of the first cable 13A and the second cable 13B, the fixing work can be easily performed.

The guide locking portion 70 of the connecting means 57 is configured by providing a cable caulking portion 78 for inserting and fixing the end of the wire cable 13 in the outer deformed portion 74, and the cable caulking portion 78 is long in the axial direction of the wire cable 13. Since the distal end is opened by the cylindrical member and the base is fixed to the outer deformed portion 74, the end of the wire cable 13 is inserted into the cable crimping portion 78 and pressure is applied from the outside of the cable crimping portion 78. When crimped, the end portion of the wire cable 13 can be locked to the guide locking portion 70.

In this case, since the cable crimping portion 78 protrudes substantially forward from the outer deformed portion 74 in the substantially left-right direction, it is easy to apply pressure from the outside of the cable crimping portion 78, and the caulking work can be easily performed. To do.

Next, the guide locking portion 70 is provided with an outer deformed portion 74 on the outer side of the pin portion 73 that can move in the mounting hole 56, and an inner deformed portion 75 on the inner side of the pin portion 73. When the direction of the inner deformed portion 75 is changed after the insertion, the guide locking portion 70 moves the seat bottom frame 51 to the left and right sides by the outer deformed portion 74 and the inner deformed portion 75. Hold from.

Therefore, the connecting means 57 is in a temporarily assembled state in which the guide locking portion 70 is movable back and forth with respect to the mounting hole 56 but does not engage with the mounting hole 56. Therefore, in this state, the end of the wire cable 13 is not fixed to the fixed frame 46, but is engaged with the mounting hole 56 of the seat bottom frame 51, so that the end of the wire cable 13 is assembled. The operation of assembling the seat bottom frame 51 to the fixed frame 46 is facilitated by suppressing the middle dangle.

Next, since the guide locking portion 70 of the connecting means 57 is formed with a screw hole 71 penetrating the pin portion 73, the outer deformed portion 74, and the inner deformed portion 75, the screw hole 71 of the connecting means 57 is formed. When the bolt 72 is inserted from the outside of the insertion hole 77 of the fixed frame 46 in accordance with the insertion hole 77 of the fixed frame 46 and screwed into the screw hole 71 of the guide locking portion 70, the seat bottom frame 51 The attachment to the fixed frame 46 and the operation of fixing the end of the wire cable 13 to the fixed frame 46 are also completed, and the assembly operation is facilitated.

In this case, when the connecting means 57 positions the pin portion 73 of the guide locking portion 70 at the rearmost portion of the mounting hole 56 of the seat bottom frame 51, the connecting hole 57 and the screw hole of the guide locking portion 70 are provided. 71 can be made coincident with each other, so that the positioning of the guide locking portion 70 (screw hole 71) is facilitated, and the assembling work is facilitated.

In addition, since the inside deformed portion 75 is formed in a horizontally long and slanted oval shape, the guide locking portion 70 cannot be removed from the mounting hole 56 once assembled.

In another embodiment of the connecting means 57 of FIG. 19, a fitting portion 80 is formed on the outer surface of the outer deformed portion 74 so as to protrude (expand) sideways toward the outer side. Since a receiving member 81 having a fitting recess 82 is provided around 77, when the fitting portion 80 is fitted into the fitting recess 82 of the receiving member 81, the guide locking portion 70 is temporarily attached to the fixed frame 46. It can be stopped (positioned).

In this state, when the bolt 72 is inserted into the insertion hole 77 of the fixed frame 46 from the outside and the bolt 72 is screwed into the screw hole 71 of the guide locking portion 70, the seat bottom frame 51 is attached to the fixed frame 46. The fixing operation for fixing the end portion of the wire cable 13 to the fixing frame 46 is also completed, and the assembling operation is facilitated.

That is, it is not easy to align the screw hole 71 of the guide locking portion 70 with the insertion hole 77 of the fixed frame 46, but the fitting recess 82 of the receiving member 81 of the fixed frame 46 and the guide locking portion 70 are fitted. The portion 80 is configured such that when the fitting portion 80 is fitted into the fitting recess 82, the insertion hole 77 of the fixed frame 46 and the screw hole 71 of the guide locking portion 70 are aligned. When the fitting portion 80 is fitted into the fitting recess 82 of the member 81, the screw hole 71 of the guide locking portion 70 and the insertion hole 77 of the fixed frame 46 match, so that the screw hole 71 of the guide locking portion 70. Alignment with the insertion hole 77 of the fixing frame 46 is facilitated, and fixing work with the bolts 72 is facilitated.

Further, since the connecting means 57 tensions the wire cable 13 when the fitting portion 80 of the connecting means 57 is fitted into the fitting recess 82 of the fixed frame 46, the cylinder 11 of the seat pretensioner 10 is It is held in a suspended state below the front side of the seat bottom 3. Therefore, assembly work can be performed easily.

The cylinder 11 of the seat pretensioner 10 is attached to the front lower side of the seat bottom frame 51, and cable guides 61 are provided at the left and right intermediate portions of the seat bottom frame 51, and the first cable 13 </ b> A and the second cable 13 </ b> B are connected to each cable guide 61. Each of the first cable 13A and the second cable 13B is moved in the relative shortening direction because each of the first cable 13A and the second cable 13B is engaged with the fixed frame 46 by changing its direction toward the side of the fixed frame 46 and being locked. The vehicle seat 1 can be prevented from coming into contact with other components, and the seat bottom 3 can be lifted back and rearward to increase the seating surface of the seat bottom 3 below the buttocks of the seated person. The reaction force of the cushion material 62 is increased to improve the restraining effect of the seated person on the vehicle seat 1.

That is, the seat bottom frame 51 of the seat bottom 3 is disposed inside the pair of left and right fixed frames 46, and the cable guide 61 fixes the rear side portion from the middle portion of the first cable 13A and the second cable 13B extending from the cylinder 11. The direction is changed along the frame 46, and the cable caulking portion 78 of the connecting means 57 and a part of the wire cable 13 can be positioned between the seat bottom frame 51 and the fixed frame 46.

Further, the seat pretensioner 10 is configured by disposing the cylinder 11 below the front lower surface of the seat bottom frame 51 of the seat bottom 3 and arranging the cylinder 11 in one direction so that the axial direction of the cylinder 11 is the left-right direction. Therefore, the seat occupant restraint mechanism can be installed without sacrificing the seating ability of the seat occupant seated on the vehicle seat 1 behind the vehicle seat 1, and on the other hand, the operation of the seat pretensioner 10 can be performed reliably and reliably. .

In the present application, the device for restraining the seated person is a moving device for the seat bottom 3, and the seat back 2 of the vehicle seat 1 is left as it is, independent of the seat belt 40, by the seat pretensioner 10A. It is possible to sufficiently improve the restraining effect of the seat occupant by the conventional seat belt 40 by moving only the rear frame with respect to the fixed frame 46, but the left and right anchor plates of the seat belt 40 are provided by a pretensioner provided separately. It does not impede the combined use of the seat belt tensioning device that pulls both the 41 and the inner wrap anchors 42 at the same time to tension the tension of the entire seat belt 40.

Claims (7)

In a vehicle seat attached to a fixed frame fixed to a vehicle body so as to be movable in the front-rear direction, the vehicle seat includes a cylinder to which a first cable is connected, and a piston that moves in the cylinder and is connected to a second cable. A gas generator for supplying gas to the expansion chamber in the cylinder and moving the piston in a first direction and the cylinder in a second direction opposite to the first direction; and a connection fixed to the fixed frame And a seat bottom frame of the vehicle seat has a long mounting hole to which the connecting means is movably connected in the front-rear direction, and ends of the first cable and the second cable are connected to the connecting means. Vehicle seat fixed to. In Claim 1, The said connection means has a guide latching | locking part attached to the said attachment hole so that a movement in the front-back direction is possible, and the volt | bolt inserted in the penetration hole of the said fixed frame, The said volt | bolt is the said guide. A vehicle seat screwed into the screw hole of the locking portion. 3. The guide locking part according to claim 2, wherein the guide locking part is provided inside the pin part, a pin part located in the attachment hole, an outer deformed part provided outside the pin part and not entering the attachment hole, and the pin part. A vehicle seat having an inner deformed portion that can pass through the mounting hole in a predetermined orientation, and ends of the first cable and the second cable are fixed to the outer deformed portion. 4. The vehicle seat according to claim 3, wherein the outer deformed portion includes a cylindrical cable caulking portion into which end portions of the first cable and the second cable are inserted and fixed. 5. The fitting part according to claim 2, wherein a fitting part protruding laterally outward is formed on an outer surface of the outer deformed part, and the fitting part is formed around the insertion hole of the fixed frame. The vehicle seat which provided the receiving member which engages. 5. The fitting part according to claim 2, wherein a fitting part protruding laterally outward is formed on an outer surface of the outer deformed part, and the fitting part is formed around the insertion hole of the fixed frame. A vehicle seat in which a receiving member that engages is provided, and when the fitting portion is engaged with the receiving member, the insertion hole of the fixed frame and the screw hole of the guide locking portion coincide with each other. One end of the first cable and the second cable is connected to a pretensioner that moves the seat bottom of the vehicle seat, the other end of the first cable and the second cable is connected to a connecting means, and a guide locking portion of the connecting means Is inserted into the mounting hole of the seat bottom frame after a specific angle, and then the guide locking part is slightly rotated in order to prevent the guide locking part from coming off from the mounting hole, A vehicle seat assembling method in which a screw hole of a guide locking portion is made to coincide with an insertion hole of a fixed frame fixed to a vehicle body, and then a bolt inserted into the insertion hole is screwed into the screw hole.

Images