JP2014184854A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress rotations of a base member when a support member supports a seated occupant.SOLUTION: In a vehicular seat 10, an inner support 50 and an outer support 60 for supporting a seated occupant O upon a side surface collision are coupled to a base plate 32. The base plate 32 is fastened and fixed to a side frame 18 by a bolt 40. Therefore, the bolt 40 can be functioned as a rotation stopper of the base plate 32. A rotation suppressing portion 46 of the base plate 32 is bent to the inner side in a seat width direction at a back surface portion of a seat back 14. Therefore, if the base plate 32 is going to rotate to the outer side in the seat width direction, rotation force is acted from the rotation suppressing portion 46 to the seat back 14, and reaction force to the rotation force is acted from the seated occupant P to the rotation suppressing portion 46 through a seat back pad 20 and acted from the side frame 18 to the rotation suppressing portion 46. Consequently, the rotations of the base plate 32 can be suppressed.

Description

  The present invention relates to a vehicle seat provided with a support member on a side portion of a seat back.

  In the vehicle seat described in Patent Document 1 below, a side collision support mechanism is provided on a side portion of a dorsal back seat (seat back). The side collision support mechanism includes a stay (base member) fixed to a pipe-shaped skeleton frame and a front and rear moving body (support member). Then, the front and rear moving body is moved to the front side with respect to the stay (seat back) at the time of a side collision of the vehicle and the seated occupant hits the front and rear moving body, so that the movement of the seated occupant to the center in the vehicle width direction is suppressed It has become. In addition, there exist some which were described in following patent document 2-patent document 4 as a vehicle seat which suppresses the movement to a vehicle width direction center side of a seated passenger.

JP 2005-335458 A Special table 2012-508137 gazette JP 2009-280023 A JP 2007-230310 A

  However, in the above-described vehicle seat, the stay may rotate around the skeleton frame when the forward / backward moving body supports the seated occupant. That is, when the seated occupant hits the longitudinally moving body during a side collision of the vehicle, a load toward the center in the vehicle width direction acts on the longitudinally moving body. Therefore, a rotational moment around the skeleton frame is generated in the stay, and the stay may rotate around the skeleton frame due to the rotational moment. Therefore, the vehicle seat has room for improvement in this respect.

  In view of the above fact, an object of the present invention is to provide a vehicle seat that can suppress rotation of a base member when a support member supports a seated occupant.

  The vehicle seat according to claim 1 is provided on a side portion of the seat back in the vehicle width direction center side, and is moved to the front side of the seat at the time of a side collision of the vehicle to suppress the movement of the seated occupant, and the support A support member is movably connected to the seat back with respect to the seat back, and a rear end portion of the seat back is provided between the member and the seat back. And a base member bent inward in the seat width direction at the back surface portion of the back.

  In the vehicle seat according to the first aspect, the support member is provided on the side portion of the seat back in the center in the vehicle width direction, and the base member is disposed between the support member and the seat back. The base member is fixed to the skeleton member of the seat back, and the support member is connected to the seat back so as to be movable to the front side of the seat by the base member. The support member is moved to the seat front side with respect to the seat back at the time of a side collision of the vehicle, and the seated occupant moved to the outside in the seat width direction hits the support member. Thereby, the movement to the seat width direction outer side of a seated occupant can be suppressed at the time of a vehicle side collision.

  Further, when the seated occupant moved to the outside in the seat width direction hits the support member, a load to the outside in the seat width direction acts on the support member. For this reason, the base member generates a rotational moment centered on the fixed portion with the skeleton member.

  Here, the base member is fastened and fixed to the skeleton member of the seat back. For this reason, the fastening member that fastens and fixes the base member to the skeleton member can function as a rotation stop for the base member. Thereby, rotation of a base member can be controlled.

  Moreover, the rear end portion of the base member is bent inward in the seat width direction at the back portion of the seat back. For this reason, when the base member tries to rotate due to the rotational moment acting on the base member, the rear end portion of the base member tends to be displaced to the front side of the seat. That is, a rotational force from the rear end portion of the base member to the seat back acts on the seat front. And if the said rotational force acts on a seat back, the reaction force with respect to the said rotational force will act on the rear-end part of a base member via a seat back from a seated passenger. Thereby, rotation of a base member can be suppressed also by the rear-end part of a base member.

  According to a second aspect of the present invention, there is provided the vehicle seat according to the first aspect, wherein a plurality of the support members are provided in the seat width direction. The support member is connected to the inner side in the seat width direction so as to be movable to the front side of the seat.

  In the vehicle seat according to claim 2, since a plurality of support members are provided, the amount of movement of the support member relative to the seat back to the front side of the seat is larger than in the case where the support member is configured as a single member. Can be set. Thereby, the length of the part which supports a seated passenger | crew in a support member is fully securable. Therefore, the movement of the seated occupant can be effectively suppressed at the time of a side collision of the vehicle.

  The vehicle seat according to claim 3 is stored in the seat back in the invention according to claim 1 or 2, and is inflated and deployed between the support member and the seated occupant at the time of a side collision of the vehicle. Equipped with an airbag.

  In the vehicle seat according to the third aspect, the airbag is stored in the seat back. The airbag is inflated and deployed between the support member and the seated occupant during a side collision of the vehicle. For this reason, the seated occupant moved to the outside in the seat width direction at the time of a side collision of the vehicle is supported by the support member via the airbag. Thereby, the protection performance with respect to the seated passenger | crew at the time of the side collision of a vehicle can be improved.

  The vehicle seat according to claim 4 is the vehicle seat according to claim 3, further comprising a connecting member that connects the support member and the airbag. It is moved to the front side of the seat by the connecting member.

  In the vehicle seat according to the fourth aspect, the support member and the airbag are connected by the connecting member. When the airbag is inflated and deployed between the support member and the seated occupant, the support member is moved to the front side of the seat by the connecting member. That is, the support member can be moved to the front side of the seat by using the deploying force of the airbag when the airbag is inflated and deployed. Thereby, a support member can be moved to the sheet front side with a simple configuration.

  According to the vehicle seat of the first aspect, the rotation of the base member when the support member supports the seated occupant can be suppressed.

  According to the vehicle seat of the second aspect, the movement of the seated occupant can be effectively suppressed at the time of a side collision of the vehicle.

  According to the vehicle seat of the third aspect, it is possible to improve the protection performance for the seated occupant at the time of a side collision of the vehicle.

  According to the vehicle seat of the fourth aspect, the support member can be moved to the front side of the seat with a simple configuration.

It is typical sectional view seen from the sheet upper side which shows the state where the inner support was moved to the inner side support position and the outer support was moved to the outer side support position in the vehicular seat concerning a 1st embodiment. It is the typical perspective view seen from the sheet | seat left diagonal back which shows the vehicle seat shown by FIG. 1 is a schematic cross-sectional view as viewed from the upper side of the seat showing the inner support shown in FIG. 1 disposed at the inner standby position and the outer support positioned at the outer standby position (enlarged section taken along line 3-3 in FIG. 2). Figure). It is the typical perspective view seen from the sheet | seat left diagonal back which shows the principal part of the support mechanism used for the vehicle seat shown by FIG. FIG. 2 is a schematic exploded perspective view showing a support mechanism used in the vehicle seat shown in FIG. It is typical sectional drawing seen from the sheet | seat upper side which shows the sheet | seat left side part of the vehicle seat which concerns on 2nd Embodiment. It is the typical perspective view seen from the sheet | seat right diagonal back which shows the principal part of the support mechanism used for the vehicle seat shown by FIG. FIG. 7 is a schematic cross-sectional view seen from the upper side of the seat showing a state in which the inner support shown in FIG. 6 is moved to the inner side support position and the outer support is moved to the outer side support position.

(First embodiment)

  Hereinafter, the vehicle seat 10 according to the first embodiment will be described with reference to FIGS. 1 to 5. The vehicle seat 10 is applied to a vehicle (automobile). In the following description, the vehicle seat 10 disposed on the vehicle right side (one side in the vehicle width direction) of the vehicle will be described. The vehicle seat 10 disposed on the left side of the vehicle is configured symmetrically with respect to the vehicle seat 10 disposed on the right side of the vehicle in the vehicle width direction. In addition, an arrow FR appropriately shown in the drawings indicates the front of the vehicle, an arrow RH indicates the right side of the vehicle, and an arrow UP indicates the upper side of the vehicle.

  As shown in FIG. 2, the vehicle seat 10 includes a seat cushion 12 on which the seated occupant P is seated, a seatback 14 that supports the back of the seated occupant P, and a side portion of the seatback 14 on the center side in the vehicle width direction. And a support mechanism 30 provided in the. The front of the seat, the right side of the seat, and the upper side of the seat in the vehicle seat 10 coincide with the front of the vehicle, the right side of the vehicle, and the upper side of the vehicle.

  The seat back 14 is disposed in a state of standing at the rear end portion of the seat cushion 12, and the lower end portion of the seat back 14 is connected to the rear end portion of the seat cushion 12. As shown in FIG. 3, a seat back frame 16 constituting a skeleton member of the seat back 14 is provided inside the seat back 14. The seat back frame 16 includes a pair of side frames 18, and the side frame 18 is manufactured from a pipe material or the like in the upper portion and manufactured from a plate material or the like in the lower portion. Are arranged on both sides of the seat back 14 in the seat width direction (in FIG. 3, only the side frame 18 on the left side of the seat is shown).

  A seat back pad 20 is provided in the seat back 14. The seat back pad 20 is made of a foam material such as urethane, and is supported by an S spring (not shown) spanned between the side frames 18. The seat back pad 20 is covered with a seat skin 22, and the seat skin 22 is stitched at the front side portions at both ends of the seat back 14 in the seat width direction.

  As shown in FIG. 2, an accommodation portion 24 for accommodating an inner support 50 and an outer support 60, which will be described later, is formed on the left side (vehicle width direction center side) side portion of the seat back 14 at the upper portion. Yes. The accommodating portion 24 is formed in a concave shape opened to the outer side in the seat width direction and penetrates in the seat front-rear direction.

  The support mechanism 30 is disposed on the left side of the seat back 14. As shown in FIG. 5, the support mechanism 30 includes a base plate 32 as a base member, an inner support 50, an outer support 60, and a moving mechanism 70. The inner support 50 and the outer support 60 correspond to the support member of the present invention.

  The base plate 32 is formed in a substantially rectangular plate shape, is disposed with the plate thickness direction being substantially the sheet width direction, and is bent into a substantially L shape when viewed from the upper side of the vehicle. The base plate 32 has a base portion 34. The base portion 34 is disposed on the outer side in the seat width direction of the side frame 18, and is slightly inclined toward the outer side in the seat width direction from the upper side of the seat toward the front side of the seat. (See FIG. 1 and FIG. 3). In addition, a plurality (three in the present embodiment) of fastened portions 36 are formed at the rear end portion of the base portion 34, and the fastened portions 36 are arranged side by side in the seat vertical direction. The fastened portion 36 is formed in a concave shape having a circular cross section that is open to the outside in the sheet width direction, and a fastening hole 36A is formed through the bottom of the fastened portion 36. A bolt 40 (which is an element grasped as a “fastening member” in a broad sense) is inserted into the fastening hole 36 </ b> A, and the bolt 40 is fastened to the side frame 18, whereby the base plate 32 is attached to the side frame 18. (See FIG. 4).

  The base portion 34 is formed with a pair of first guide holes 42 for guiding the movement of the inner support 50 described later. The first guide holes 42 are formed in a long shape whose longitudinal direction is the longitudinal direction of the sheet, and are arranged side by side in the vertical direction of the sheet.

  Further, the base portion 34 is provided with a pair of first lock members 44 at the position of the rear end portion of each first guide hole 42. The first lock member 44 is made of a plate-like spring material and is curved in a substantially U shape. A pair of first lock members 44 are arranged side by side in the vertical direction so that the curved portions of the first lock members 44 face each other in the vertical direction, and both longitudinal ends of the first lock members 44 are the bases. It is fixed to the part 34.

  As shown in FIGS. 1 and 3, the rear end portion of the base plate 32 is bent inward in the sheet width direction, and the bent portion is used as a rotation suppressing portion 46. The rotation suppression unit 46 is disposed on the seat rear side of the side frame 18 and the seat back pad 20, and is disposed so that the rear surface of the rotation suppression unit 46 is substantially flush with the rear surface (back surface) of the seat back 14. Yes.

  As shown in FIGS. 2 and 3, the inner support 50 is disposed outside the base plate 32 in the seat width direction and inside the accommodating portion 24 of the seat back 14. The inner support 50 is formed in a substantially rectangular plate shape and is disposed so as to face the base portion 34 of the base plate 32 (the position shown in FIGS. 2 and 3). Waiting position ”). As shown in FIG. 5, a pair of first shafts 52 are fixed to the seat rear portion of the inner support 50 by press fitting or the like at positions corresponding to the first guide holes 42 described above. The first shaft 52 is formed in a substantially cylindrical shape, protrudes from the inner support 50 toward the base plate 32, and is movably inserted into the first guide hole 42 of the base plate 32. Accordingly, when the first shaft 52 is moved to the front side of the seat along the first guide hole 42, the inner support 50 is projected from the seat back 14 to the front side of the seat. The position of the inner support 50 with respect to the seat back 14 when the first shaft 52 is moved to the front end portion of the first guide hole 42 is the inner support position (see FIG. 1).

  Further, a substantially disc-shaped stopper 52A is integrally formed at the tip of the first shaft 52, and the periphery of the first guide hole 42 of the base portion 34 is the inner side in the sheet width direction so that the stopper 52A can be accommodated. It is formed in a concave shape that is open. Thereby, the movement of the inner support 50 to the outside in the sheet width direction is restricted. Further, at the inner side standby position, the first shaft 52 of the inner support 50 is engaged with the first lock member 44 of the base plate 32, and the inner support 50 is held at the inner side standby position (of the inner support 50). Movement to the front of the seat is restricted).

  Further, the inner support 50 is formed with a pair of second guide holes 54 for guiding the movement of an outer support 60 described later. The second guide holes 54 are formed in a long shape whose longitudinal direction is the longitudinal direction of the sheet, and are arranged side by side in the vertical direction of the sheet.

  Further, the inner support 50 is provided with a pair of second lock members 56R and 56F at the positions of the rear end portion and the front end portion of each second guide hole 54, respectively. The second lock member provided at the rear end of the second guide hole 54 is denoted by reference numeral 56R, and the second lock member provided at the front end of the second guide hole 54 is denoted by reference numeral 56F. ing. The second lock members 56R and 56F are made of a plate-like spring material, and are curved in a substantially U shape. A pair of second lock members 56R and 56F are arranged in the vertical direction so that the curved portions of the second lock members 56R and 56F oppose each other in the vertical direction, and the second lock members 56R and 56F Both ends in the longitudinal direction are fixed to the inner support 50.

  Further, an inner rack 58 is formed at the upper end of the inner support 50. The inner rack 58 is constituted by a plurality of rack teeth and meshes with an inner pinion 92 described later.

  As shown in FIGS. 2 and 3, the outer support 60 is disposed outside the inner support 50 in the seat width direction and inside the accommodating portion 24 of the seat back 14. Further, the outer support 60 is formed in a substantially plate shape whose outer surface in the sheet width direction is curved, and is disposed so as to face the inner support 50 (the position shown in FIGS. 2 and 3). This position is called “outer side standby position”). As shown in FIG. 5, a pair of second shafts 62 is fixed to the seat rear side portion of the outer support 60 at a position corresponding to the second guide hole 54 of the inner support 50 by press-fitting or the like. The second shaft 62 is formed in a substantially cylindrical shape, protrudes from the outer support 60 to the inner support 50 side, and is movably inserted into the second guide hole 54 of the inner support 50. Accordingly, when the second shaft 62 is moved to the front side of the seat along the second guide hole 54, the outer support 60 is projected from the inner support 50 to the front side of the seat. And the outer support 60 position with respect to the inner support 50 when the 2nd shaft 62 is moved to the front-end part of the 2nd guide hole 54 is made into the outer side support position (refer FIG. 1).

  Further, like the first shaft 52, a substantially disc-shaped stopper 62A is integrally formed at the tip of the second shaft 62, and the second guide hole of the inner support 50 is accommodated so that the stopper 62A can be accommodated. The periphery of 54 is formed in a concave shape opened to the inner side in the sheet width direction. Thereby, the movement of the outer support 60 to the outside in the sheet width direction is restricted. Further, at the outer side standby position, the second shaft 62 is engaged with the second lock member 56R of the inner support 50, and the outer support 60 is held at the outer side standby position (the outer support 60 toward the seat front side). Movement is restricted). When the outer support 60 is moved to the outer side support position, the second shaft 62 is engaged with the second lock member 56F, and the outer support 60 is held at the outer side support position (the outer support 60). Movement to the back of the seat is limited).

  Further, an outer rack 64 is formed at the upper end portion of the outer support 60. The outer rack 64 includes a plurality of rack teeth and meshes with an outer pinion 94 described later.

  The moving mechanism 70 is a mechanism for moving the inner support 50 and the outer support 60 to the front side of the seat, and includes a cylinder 72, a piston 80, and a pinion unit 86. The cylinder 72 is formed in a substantially cylindrical shape whose one end is bent, and is disposed on the inner side in the sheet width direction of the base plate 32. The cylinder 72 is fixed to the base plate 32 via a bracket (not shown) with the axial direction set to the seat vertical direction.

  A substantially cylindrical gas generator 74 is fixed to one end (lower end) of the cylinder 72. When the gas generator 74 is operated, the gas generated by the gas generator 74 is supplied into the cylinder 72. The gas generator 74 is electrically connected to an ECU 76 of the vehicle, and the ECU 76 is electrically connected to a side collision sensor 78. Then, based on the signal output from the side collision sensor 78 to the ECU 76, when the ECU 76 detects a side collision of the vehicle (including the case of predicting a side collision of the vehicle, the “during a side collision of the vehicle” of the present invention. Correspondingly), the gas generator 74 is operated under the control of the ECU 76.

  The piston 80 is formed in a substantially column shape and is accommodated in the cylinder 72. The lower end portion of the piston 80 is formed in a substantially cylindrical shape, and an O-ring (not shown) is disposed between the lower end portion and the cylinder 72. Thereby, the space between the cylinder 72 and the piston 80 is sealed. The piston 80 is formed with a piston-side rack 82. The piston-side rack 82 is constituted by a plurality of rack teeth, and can be engaged with a drive pinion 90 described later.

  Further, a plurality of balls 84 are accommodated in the cylinder 72 between the piston 80 and the gas generator 74. When the gas generator 74 is operated under the control of the ECU 76, the ball 84 presses the piston 80 by the pressure of the gas generated by the gas generator 74, and the piston 80 is moved to the upper side of the seat. . The ball 84 may be omitted, and the piston 80 may be moved by the pressure of the gas generated by the gas generator 74.

  The pinion unit 86 is provided on the seat upper side of the inner support 50 and the outer support 60. The pinion unit 86 has a shaft-like connection shaft 88, and the connection shaft 88 is rotatably supported by the bracket described above with the axial direction being the plate thickness direction of the inner support 50.

  A drive pinion 90 is provided at the inner end of the connecting shaft 88 in the seat width direction so as to be integrally rotatable. The drive pinion 90 is disposed coaxially with the connecting shaft 88 and above the seat of the piston 80. When the piston 80 is moved to the upper side of the seat, the piston-side rack 82 of the piston 80 is engaged with the drive pinion 90, and the drive pinion 90 is rotated.

  Further, an inner pinion 92 is provided at the outer end of the connecting shaft 88 in the seat width direction so as to be integrally rotatable. The inner pinion 92 is disposed coaxially with the connecting shaft 88 and meshes with the inner rack 58 of the inner support 50. As a result, when the drive pinion 90 is rotated, the inner pinion 92 is rotated and the inner support 50 is moved to the front side of the seat.

  Further, an outer pinion 94 is provided at the outer end portion in the seat width direction of the connecting shaft 88 at an outer position in the seat width direction of the inner pinion 92 so as to be integrally rotatable. The outer pinion 94 is disposed coaxially with the connecting shaft 88 and meshes with the outer rack 64 of the outer support 60. As a result, when the drive pinion 90 is rotated, the outer pinion 94 is rotated and the outer support 60 is moved to the front side of the seat.

  Further, the diameter dimension of the meshing pitch circle of the outer pinion 94 is set larger than the diameter dimension of the meshing pitch circle of the inner pinion 92. For this reason, the amount of movement of the outer support 60 due to the rotation of the outer pinion 94 is set to be larger than the amount of movement of the inner support 50 due to the rotation of the inner pinion 92. That is, the outer support 60 and the inner support 50 move relative to the seat back 14 toward the seat front side while the outer support 60 moves relative to the inner support 50 toward the seat front side.

  Further, when the outer support 60 has reached the outer side support position, the outer pinion 94 is meshed with the rear end of the outer rack 64, and the inner support 50 is positioned on the rear side of the seat with respect to the inner side support position. Has been. When the inner support 50 and the outer support 60 are further moved to the front side of the seat from this state, the engagement state between the outer rack 64 and the outer pinion 94 is maintained while the engagement state between the inner rack 58 and the inner pinion 92 is maintained. It is configured to be released. That is, the inner support 50 is configured to be moved together with the outer support 60 to the inner side support position while the outer support 60 is held by the inner support 50 at the outer side support position. In this state, the entire outer support 60 protrudes toward the seat front side with respect to the seat back 14 (see FIG. 1).

  Next, the operation and effect of the first embodiment will be described. Moreover, in the following description, the case where a side collision (far side side collision) occurs from the left side of the vehicle with respect to the vehicle seat 10 disposed on the right side of the vehicle will be described.

  In the vehicle seat 10 configured as described above, the inner support 50 of the support mechanism 30 is disposed at the inner standby position, and the outer support 60 is disposed at the outer standby position. When the ECU 76 detects a vehicle side collision (including a case where a vehicle side collision is predicted) based on a signal output from the side collision sensor 78 to the ECU 76, the gas generator 74 is controlled by the ECU 76. Actuated. When the gas generator 74 is actuated, the gas generated by the gas generator 74 is supplied into the cylinder 72, and the piston 80 moves to the upper side of the seat by the pressure of the gas and meshes with the drive pinion 90. As a result, the drive pinion 90 is rotated about the axis of the connection shaft 88 and the inner pinion 92 and the outer pinion 94 are rotated about the axis of the connection shaft 88.

  When the inner pinion 92 is rotated, the inner rack 50 meshed with the inner pinion 92 moves the inner support 50 from the inner standby position to the seat front side. At this time, the first shaft 52 of the inner support 50 is moved to the front side of the seat and the first lock member 44 is elastically deformed, so that the engagement state between the first shaft 52 and the first lock member 44 is released. The

  When the outer pinion 94 is rotated, the outer support 60 is moved from the outer standby position to the seat front side by the outer rack 64 meshed with the outer pinion 94. At this time, the second shaft 62 of the outer support 60 is moved to the front side of the seat and the second lock member 56R of the inner support 50 is elastically deformed, so that the second shaft 62 and the second lock member 56R are engaged. The state is released.

  Further, when the inner support 50 and the outer support 60 are moved to the seat front side with respect to the seat back 14, the diameter dimension of the meshing pitch circle of the outer pinion 94 is larger than the diameter dimension of the meshing pitch circle of the inner pinion 92. Therefore, the outer support 60 is moved relative to the inner support 50 toward the seat front side.

  When the outer support 60 reaches the outer support position, the second shaft 62 of the outer support 60 and the second lock member 56F of the inner support 50 are engaged. As a result, the outer support 60 is held by the inner support 50 at the outer side support position. In this state, the outer pinion 94 is engaged with the rear end of the outer rack 64, and the inner support 50 is disposed at a position on the rear side of the seat with respect to the inner side support position.

  When the inner pinion 92 and the outer pinion 94 are further rotated from this state, the inner support 50 and the outer support 60 are further moved to the seat front side, and the meshing state between the outer pinion 94 and the outer rack 64 is released. Then, the inner support 50 is moved to the inner side support position while the outer support 60 is held by the inner support 50 at the outer side support position. As a result, the inner support 50 protrudes toward the seat front side with respect to the seat back 14, and the entire outer support 60 protrudes toward the seat front side with respect to the seat back 14 (see FIG. 1).

  The upper arm portion of the seated occupant P moved to the left side of the vehicle seat 10 (the vehicle width direction center side) hits the inner support 50 and the outer support 60. As a result, the movement of the seated occupant P toward the left side of the seat (vehicle width direction center side) at the time of a side collision of the vehicle is suppressed.

  Further, when the upper arm portion of the seated occupant P hits the inner support 50 and the outer support 60, a load on the inner support 50 and the outer support 60 acts on the outer side in the seat width direction. For this reason, a rotational moment is generated in the base plate 32 toward the outer side in the seat width direction around the fastening portion of the seat back 14 with the side frame 18 (see arrow M in FIG. 1).

  Here, the base plate 32 is fastened and fixed to the side frame 18 by bolts 40. For this reason, the bolt 40 can function as a rotation stopper for the base plate 32. Thereby, rotation of the base plate 32 can be suppressed.

  In addition, the rotation suppressing portion 46 of the base plate 32 is bent inward in the seat width direction at the back portion of the seat back 14. For this reason, when the base plate 32 tries to rotate around the fastening portion with the side frame 18, the rotation suppressing portion 46 tends to be displaced to the front side of the seat. In other words, the rotational force from the rotation suppression unit 46 to the seat back 14 acts on the seat front side. When the rotational force acts on the seat back 14, a reaction force against the rotational force acts on the rotation suppression unit 46 from the seat occupant P through the seat back pad 20, and from the side frame 18 to the rotation suppression unit 46. Works. Accordingly, the rotation of the base plate 32 can also be suppressed by the rotation suppression unit 46.

  In this way, the base plate 32 is fastened and fixed to the side frame 18 by the bolts 40, and the rear end portion of the base plate 32 is bent inward in the seat width direction at the back surface portion of the seat back 14, thereby the inner support 50 and the outer support 60. Can suppress the rotation of the base plate 32 when the seated occupant P is supported.

  The support mechanism 30 in the vehicle seat 10 includes an inner support 50 and an outer support 60. That is, the support member for suppressing the movement of the seated occupant P is composed of two members. Thereby, for example, the protrusion amount of the support member from the seat back 14 can be increased as compared with the case where the support member is configured by only the inner support 50 (one member). Thereby, the length of the part which supports the seating passenger | crew P in a support member (the inner support 50 and the outer support 60) is fully securable. Therefore, the movement of the seated occupant P can be effectively suppressed at the time of a side collision of the vehicle.

(Second Embodiment)

  Hereinafter, the vehicle seat 100 according to the second embodiment will be described with reference to FIGS. 6 to 8. The vehicle seat 100 is configured in the same manner as the vehicle seat 10 of the first embodiment except for the following points.

  That is, as shown in FIG. 6, in the vehicle seat 100, the airbag device 102 is stored at the left end portion of the seatback 14. The airbag device 102 includes an airbag 104 and an inflator 106. The airbag 104 is accommodated in the case 108 in a folded state, and the inflator 106 is accommodated in the airbag 104.

  The inflator 106 is electrically connected to the ECU 76. Then, when the ECU 76 detects a side collision based on a signal output from the side collision sensor 78 to the ECU 76 (including a case in which a side collision of the vehicle is predicted), the inflator 106 is operated by the control of the ECU 76. It has become. Thereby, gas is supplied from the inflator 106 to the airbag 104, and the airbag 104 is inflated and deployed. Further, when the airbag 104 is inflated and deployed, the stitching portion of the seat cover 22 is cleaved by the deploying force of the airbag 104 so that the airbag 104 is inflated and deployed on the outside of the seat occupant P in the seat width direction. (See FIG. 8).

  On the other hand, in the support mechanism 30, the moving mechanism 70 is omitted. Further, as shown in FIG. 7, the base plate 32 is formed with a through hole 110 through which a connecting string 116, which will be described later, is inserted. It is arranged to be inclined. Furthermore, a groove portion 112 extending in the seat front-rear direction is formed on the inner side surface of the inner support 50 in the seat width direction. The inner support 50 is integrally formed with a fixing portion 114 for fixing a connecting string 116 described later at the position of the rear end portion of the groove portion 112, and the fixing portion 114 has a substantially columnar shape. In FIG. 7, the first guide hole 42 and the second guide hole 54 are not shown for convenience.

  Further, a connecting string 116 as a connecting member is provided between the airbag 104 and the inner support 50. The connecting string 116 is flexible and is formed in a long shape. As shown in FIG. 8, one end in the longitudinal direction of the connecting string 116 is stitched to the front end of the airbag 104 to be inflated and deployed, and the other end in the longitudinal direction of the connecting string 116 is connected to the inner support 50. It is fixed to the fixing part 114. When the airbag 104 is inflated and deployed, the inner support 50 is pulled by the connecting cord 116 toward the front side of the seat. Further, in a state where the airbag 104 is inflated and deployed and the inner support 50 is disposed at the inner side support position, the length of the connecting string 116 is set so that tension is applied to the connecting string 116.

  Next, the operation and effect of the second embodiment will be described.

  In the vehicle seat 100, the inner support 50 of the support mechanism 30 is disposed at the inner standby position, and the outer support 60 is disposed at the outer standby position. When the ECU 76 detects a side collision of the vehicle based on a signal output from the side collision sensor 78 to the ECU 76 (including a case where a side collision of the vehicle is predicted), the inflator 106 is operated by the control of the ECU 76. Is done. When the inflator 106 is operated, the gas generated by the inflator 106 is supplied into the airbag 104, and the airbag 104 is inflated and deployed. At this time, the stitched portion of the seat skin 22 is cleaved by the deploying force of the airbag 104, and the airbag 104 is inflated and deployed from the seat back 14 to the front side of the seat.

  Further, when the airbag 104 is inflated and deployed from the seat back 14 to the front side of the seat, the inner support 50 is pulled to the front side of the seat by the connecting cord 116, and the inner support 50 is moved from the inner standby position to the inner side support position. Moved. At this time, since the outer support 60 is held by the inner support 50 by the second lock member 56R, the outer support 60 is moved together with the inner support 50 to the inner side support position.

  When the inner support 50 is stopped at the inner side support position, the engagement state between the second shaft 62 and the second lock member 56R is released by the inertial force acting on the outer support 60 toward the seat front side. For this reason, the outer support 60 is moved from the outer standby position to the outer support position by the inertial force, and the second shaft 62 is engaged with the second lock member 56F. As a result, the inner support 50 protrudes toward the seat front side with respect to the seat back 14, and the entire outer support 60 protrudes toward the seat front side with respect to the seat back 14 (see FIG. 8). Further, an inflated airbag 104 is disposed between the inner support 50 and the outer support 60 and the seated occupant P.

  Accordingly, the upper arm portion of the seated occupant P that is moved to the left side of the vehicle seat 100 (the vehicle width direction center side) with respect to the vehicle seat 100 at the time of a side collision of the vehicle becomes the inner support 50 and the outer support 60 via the airbag 104. Supported. As a result, the movement of the seated occupant P toward the left side of the seat (vehicle width direction center side) at the time of a side collision of the vehicle is suppressed. As described above, also in the second embodiment, the same operations and effects as those in the first embodiment can be achieved.

  In the second embodiment, as described above, the airbag 104 is inflated and deployed between the inner support 50 and the outer support 60 and the seated occupant P at the time of a side collision of the vehicle. It is supported by the inner support 50 and the outer support 60 through 104. Thereby, the protection performance with respect to the seated passenger | crew P at the time of the side collision of a vehicle can be improved.

  Further, the inner support 50 and the airbag 104 are connected by a connecting string 116. When the airbag 104 is inflated and deployed, the inner support 50 is pulled to the front side of the seat by the connecting cord 116, and the outer support 60 is moved to the front side of the seat by inertia force. That is, the inner support 50 and the outer support 60 can be moved to the front side of the seat by utilizing the deploying force of the airbag 104 when the airbag 104 is inflated and deployed from the seat back 14 to the front side of the seat. Thereby, the inner support 50 and the outer support 60 can be moved to the front side of the seat with a simple configuration.

  In the second embodiment, the outer support 60 is configured to be moved from the outer standby position to the outer support position by inertial force. Alternatively, a drive member such as a motor or a solenoid may be provided in the inner support 50, and the outer support 60 may be moved from the outer side standby position to the outer side support position by the drive member.

  Moreover, you may comprise the connection string 116 in 2nd Embodiment with an elongate cloth material. That is, it is only necessary that the member connecting the airbag 104 and the inner support 50 is formed in a long shape and has flexibility.

  Furthermore, in the first embodiment and the second embodiment, the support mechanism 30 includes the inner support 50 and the outer support 60. That is, the support member that suppresses the movement of the seated occupant P is composed of two members. Instead of this, the outer support 60 may be omitted, and the support member may be constituted by one member, or the support member may be constituted by three or more members. For example, when the support member is constituted by three members, a support member is added to the outer side of the outer support 60 in the seat width direction, and the added support member is connected to the outer support 60 so as to be movable to the front side of the seat. Then, a drive member such as a motor or a solenoid may be provided in the outer support 60, and the support member may be moved to the front side of the seat by the drive member.

  In the first embodiment and the second embodiment, three fastened portions 36 are formed on the base plate 32, but the number of fastened portions 36 can be arbitrarily set.

  Furthermore, in the first embodiment and the second embodiment, the support mechanism 30 is disposed on the side of the seat back 14 on the left side of the seat (vehicle width direction center side). Support mechanisms 30 may be disposed on both sides in the direction.

10 Vehicle Seat 14 Seat Back 18 Side Frame (Frame Member)
32 Base plate (base member)
46 Rotation suppression part (rear end part)
50 Inner support (support material)
60 Outer support (support member)
100 Vehicle Seat 104 Airbag 116 Connection String (Connection Member)

Claims (4)

A support member which is provided on a side portion of the seat back in the vehicle width direction center side and which is moved to the front side of the seat at the time of a side collision of the vehicle and suppresses the movement of the seated occupant;
Provided between the support member and the seat back, and fastened and fixed to the skeleton member of the seat back, and the support member is movably connected to the seat back to the seat front side, and the rear end portion is A base member bent inward in the seat width direction at the back portion of the seat back;
Vehicle seat equipped with A plurality of the support members are provided in the sheet width direction,
2. The vehicle seat according to claim 1, wherein, in a pair of adjacent support members, the support member on the outer side in the seat width direction is connected to the support member on the inner side in the seat width direction so as to be movable forward of the seat.   The vehicle seat according to claim 1, further comprising an airbag that is stored in the seat back and is inflated and deployed between the support member and a seated occupant in a side collision of the vehicle. A connecting member for connecting the support member and the airbag;
The vehicle seat according to claim 3, wherein the support member is moved to the front side of the seat by the connecting member when the airbag is inflated and deployed.

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