JP5741473B2 - Vehicle seat and vehicle - Google Patents

Description

  The present invention relates to a vehicle seat and a vehicle.

  Patent Document 1 below discloses a technique in which a seat spring called an S spring is stretched on a cushion frame of a seat cushion, and a seat cushion pad is elastically supported by the seat spring. Furthermore, in this prior art, it is disclosed that the seat spring is stretched while avoiding a position immediately below a portion corresponding to the ischial node.

JP 2006-280432 A

  However, in the case of the above-described prior art, the improvement of the so-called submarine phenomenon in which the occupant's lower back sinks deeply into the seat cushion at the time of a frontal collision or at the time of a frontal collision prediction (hereinafter referred to as “frontal collision, etc.” as appropriate). There is room. In other words, when the vehicle is running, the occupant is restrained by the webbing of the three-point seat belt device. Try to sink. Further, for example, in a vehicle equipped with a knee airbag device, the knee of the occupant is restrained by the knee airbag at the time of a frontal collision or the like, so that the waist may easily sink into the seat cushion. In addition, when the passenger | crew's waist | hip | lumbar part sinks into a seat cushion excessively, the restraint performance by webbing may fall.

  In view of the above facts, an object of the present invention is to provide a vehicle seat and a vehicle that can effectively suppress excessive sinking of a passenger's waist into a seat cushion during a frontal collision or the like.

A vehicle seat according to a first aspect of the present invention includes a seat cushion pad on which an occupant is seated, a seat cushion frame that is disposed below the seat cushion pad and supports the seat cushion pad, and the seat cushion frame. A subsidence suppressing member disposed between the front and rear portions of the seat cushion pad and having a surplus length so that the intermediate portion is spaced from the lower surface of the seat cushion pad toward the seat lower side . The subsidence suppression member is arranged along a position further lowered from the position of the lower surface of the seat cushion pad when a passenger of a standard physique is seated in a side view of the vehicle.

  A vehicle seat according to a second aspect of the present invention is the vehicle seat according to the first aspect, wherein the sinking suppression members are respectively provided below the left and right hip joint root positions of the seated occupant.

  A vehicle seat according to a third aspect of the present invention is the vehicle seat according to the first or second aspect, wherein a plurality of seat springs are provided along the lower surface of the seat cushion pad between the front and rear portions of the seat cushion frame. It is stretched side by side in the seat width direction, and the sinking suppression member is disposed between the adjacent seat springs.

  The vehicle seat according to a fourth aspect of the present invention is the vehicle seat according to any one of the first to third aspects, wherein the subsidence suppressing member is configured such that a suture is applied when a load of a predetermined value or more is applied. A flexible belt that has a surplus length part that breaks and extends in the front-rear direction of the sheet, or a plate that is divided in the front-rear direction of the sheet and that is connected so as to extend a predetermined length when a load greater than a predetermined value is applied It is constituted by.

  The vehicle according to the fifth aspect of the present invention operates the vehicle seat according to any one of the first to fourth aspects and the knee of a seated occupant during a frontal collision or a frontal collision prediction. A vehicle knee airbag device having a knee airbag device to be restrained, or a vehicle cushion airbag device having a cushion airbag that operates at the time of a frontal collision or a frontal collision prediction and inflates below a seated occupant; have.

  The effect | action of this invention of Claim 1 is as follows. After the occupant is seated on the seat cushion of the vehicle seat, the occupant pulls out the webbing of the seatbelt device and engages the tongue plate with the buckle device to enter the webbing wearing state.

By the way, at the time of a frontal collision or the like, the seated occupant tries to move while maintaining the state restrained by the webbing, so that the waist part sinks into the seat cushion pad. Here, in the present invention, since the subsidence suppressing member having an extra length is provided on the lower side of the seat cushion pad so as to be separated from the lower surface of the seat cushion pad toward the lower side of the seat, more specifically, the subsidence is performed. The restraining member is placed along the position where the seat cushion pad lowers from the position of the lower surface of the seat cushion pad when a standard occupant is seated, as seen from the side of the vehicle. Is done. In other words, if the seated occupant's lumbar part further sinks from the initial sinking position of the seat cushion pad (the position of the lower surface of the seat cushion when the standard occupant is seated), the lower surface of the seat cushion pad is suppressed. Interfering with the member and further excessive sinking is suppressed.

  According to the second aspect of the present invention, since the sinking suppression members are respectively provided below the left and right hip joint base positions of the seated occupant, the seat cushion pad sinks at the portion where the input to the seat cushion pad is the largest. Is suppressed.

  According to the third aspect of the present invention, when the occupant sits on the seat cushion, the seat cushion pad sinks to the lower side of the seat, and the plurality of seat springs arranged on the lower surface of the seat cushion pad are pulled down while the seat is under the seat. Displace to the side.

  Here, in the present invention, since the subsidence suppression member is disposed between adjacent seat springs, the seat spring and the subsidence suppression member do not interfere with each other. For this reason, even if the sinking suppression member is made of metal, the spring characteristics are not changed by the interference of the seat spring with the sinking suppression member, and the spring performance is not affected.

  According to the fourth aspect of the present invention, the subsidence restraining member is constituted by a flexible belt or a plate connected so as to be stretchable, and when a load of a predetermined value or more is applied, the former case is applicable. In this case, the suture is broken and the belt is extended. In the latter case, the plate is extended by a predetermined length. That is, in this invention, it has two aspects before extension and after extension, and the sinking to the seat cushion pad of a seat passenger's waist | hip | lumbar part is controlled by the belt or plate after extension.

  According to the fifth aspect of the present invention, a vehicle knee airbag device or a vehicle cushion airbag device is mounted on the vehicle. For this reason, when the front airbag collision or the front collision prediction occurs, when the vehicle knee airbag device is mounted, the knee airbag is inflated and deployed, and both knees of the seated occupant are restrained by the knee airbag. . In addition, when the vehicle cushion airbag device is mounted, the cushion airbag is inflated and deployed, the front portion of the seat seat surface is lifted, and the inertial movement of the seated occupant toward the vehicle front side is suppressed.

  On the other hand, when the above-described occupant protection device is mounted, it is conceivable that the waist of the seated occupant is easily depressed by the seat cushion pad. For this reason, when the above-described occupant protection device and the vehicle seat according to any one of claims 1 to 4 are mounted as a set, both the knees of the seated occupant or the vehicle of the seated occupant In addition to reducing the amount of inertial movement to the front side, the lowering of the seated occupant's waist is suppressed, which is very effective.

  As described above, the vehicle seat according to the first aspect of the present invention is excellent in that it can effectively suppress excessive sinking of the seat occupant in the seat cushion at the time of a frontal collision or the like. Has an effect.

  The vehicle seat according to the second aspect of the present invention has an excellent effect that it is possible to more effectively suppress excessive subsidence of the seated occupant in the seat cushion during a frontal collision.

  The vehicle seat according to the third aspect of the present invention has an excellent effect that the adverse effect due to the mutual interference between the seat spring and the sinking suppression member can be eliminated.

  The vehicle seat according to the fourth aspect of the present invention has an excellent effect that the object of the present invention can be achieved with an inexpensive configuration.

  The vehicle according to the fifth aspect of the present invention has an excellent effect that the occupant protection performance in a vehicle equipped with the vehicle knee airbag device or the vehicle cushion airbag device can be further improved.

It is a top view of the vehicular seat concerning a 1st embodiment. FIG. 2 is an enlarged longitudinal sectional view showing an enlarged state cut along line 2-2 in FIG. 1. It is a schematic side view which shows a mode when the vehicle provided with the vehicle seat shown in FIG. 1 becomes a front collision or the like in relation to the vehicle knee airbag device. (A) is a top view of the beam-like member which comprises the principal part of the vehicle seat which concerns on 2nd Embodiment, (B) is the sectional side view. (A) is a sectional side view of the belt constituting the main part of the vehicle seat according to the third embodiment, and (B) is a state in which the suture is broken from the state shown in (A) and the extra length portion is extended. It is a sectional side view which shows the state made.

[First Embodiment]
A vehicle seat and a first embodiment of the vehicle according to the present invention will be described below with reference to FIGS. Note that an arrow FR appropriately shown in each figure indicates the vehicle front side, and an arrow UP indicates the vehicle upper side. Furthermore, the arrow IN indicates the inner side in the vehicle width direction.

  As shown in FIG. 3, a vehicle seat 16 is installed on the vehicle body floor 14 of the cabin 12 of the vehicle 10. In the drawing, a vehicle seat 16 for a driver's seat is shown. The vehicle seat 16 is supported by a seat cushion 18 on which an occupant is seated, a seat back 20 that is tiltably supported at a rear end portion of the seat cushion 18, and an upper end portion of the seat back 20 so that vertical movement adjustment is possible. The headrest 22 is provided.

  A seat belt device 24 is disposed around the vehicle seat 16 for the driver's seat. The seat belt device 24 includes a webbing 26 for restraining an occupant. One end of the webbing 26 is locked to a webbing take-up device disposed at a lower portion of a center pillar (not shown). The other end of the webbing 26 is fixed to an anchor plate (not shown) fixed to the vehicle body floor 14. Further, an intermediate portion of the webbing 26 is inserted and folded back through a shoulder anchor (not shown) disposed at the upper portion of the center pillar. A tongue plate (not shown) is inserted in an intermediate portion of the webbing 26. By engaging the tongue plate with the buckle device, the seated occupant can be in a webbing wearing state of the three-point seat belt device 24.

  An instrument panel 28 is disposed on the vehicle front side of the vehicle seat 16, and a column cover 30 that covers a rear end portion of a steering column (not shown) is disposed on the driver seat side of the instrument panel 28. It is installed. A vehicle knee airbag device 32 is disposed in the column cover 30. When a frontal collision or a frontal collision prediction occurs, an inflator (not shown) is activated to generate gas, and the knee airbag 34 is seated by a seated occupant. Inflated and deployed to cover both knees. A driver seat airbag 37 is inflated and deployed from the steering wheel 35.

  Next, the structure of the seat cushion 18 which is a main part of the present embodiment will be described. As shown in FIGS. 1 and 2, the seat cushion 18 includes a seat cushion pad 38 whose surface is covered with an outer skin 36, and a seat that is disposed on the seat lower side of the seat cushion 18 and supports the seat cushion pad 38. And a cushion frame 40.

  The seat cushion frame 40 includes a pair of left and right side frames 42 that are arranged with the vehicle longitudinal direction as a longitudinal direction, and a front frame 44 that connects the front ends of these side frames 42 in the vehicle width direction. A metal frame body 46 is provided. Further, the front frame 44 has an L-shaped cross section along the vehicle front-rear direction, and includes a front portion 44A and an upper surface portion 44B. A pipe-like connecting rod 48 having an axial direction in the vehicle width direction is bridged between the rear end portions of the left and right side frames 42, and the rear end portions of the side frames 42 are connected in the vehicle width direction. doing. The connecting rod 48 also forms part of the seat cushion 18. In addition, the lower end part of the seat back frame 50 which comprises the frame | skeleton member of the seat back 20 is supported by the rear-end upper part of the left and right side frames 42 so that inclination is possible.

  A plurality of S springs 52 are stretched along the lower surface 38 </ b> A of the seat cushion pad 38 between the upper surface portion 44 </ b> B of the front frame 44 corresponding to the front and rear portions of the seat cushion frame 40 and the connecting rod 48. Yes. Each S spring 52 has a rectangular wave shape that repeats an S-shape in the front-rear direction of the seat, a front end portion is fixed to the upper surface of the upper surface portion 44B, and a rear end portion is fixed to the connecting rod 48. The S spring 52 corresponds to the “seat spring” in the present invention.

  As shown in FIG. 1, a gap 54 having a predetermined width is provided between S springs 52 adjacent in the seat width direction, and the gap 54 serves as a subsidence suppression member having a longitudinal direction in the vehicle front-rear direction. A pair of left and right beam-like members 56 are disposed. The left and right beam members 56 are respectively provided below the left and right hip joint root positions of the seated occupant. The beam-like member 56 is a metal strip-like member set to a width narrower than the width of the gap 54. 1 and 2, the front end portion 56A of the beam-like member 56 is fixed to the upper surface of the upper surface portion 44B of the front frame 44 by fixing means such as welding. Further, the rear end portion 56B of the beam-like member 56 is fixed to a lower portion of the outer peripheral surface of the connecting rod 48 by fixing means such as welding. The member to be attached to the front end portion or the rear end portion of the beam-shaped member 56 is not limited to the upper surface portion 44B of the front frame 44 and the connecting rod 48, and may be replaced when other members can be used.

  Further, the beam-like member 56 is bent so that the lower side of the sheet is convex in a side view. More specifically, the beam-like member 56 is disposed in a state having an extra length so that the intermediate portion 56C is separated from the lower surface 38A of the seat cushion pad 38 toward the seat lower side. FIG. 2 shows the position of the lower surface 38A of the seat cushion pad 38 when the (adult) occupant of the standard physique is seated by a one-dot chain line P, and the occupant who is heavier than the standard occupant is seated The lower surface 38A of the seat cushion pad 38 is shown by a two-dot chain line Q, but the beam-like member 56 of the present embodiment is arranged in a shape that is bent in a substantially arc shape along the two-dot chain line Q. ing.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  After the occupant is seated on the seat cushion 18 of the vehicle seat 16, the occupant pulls out the webbing of the seatbelt device 24 and engages the tongue plate (not shown) with the buckle device (not shown), so that the webbing is attached.

  By the way, at the time of frontal collision or at the time of prediction of frontal collision, the occupant tries to move while maintaining the state of being restrained by the webbing 26, so that the waist part sinks into the seat cushion pad 38. Here, in the present embodiment, the pair of left and right beam-like members 56 having a surplus length are provided on the lower side of the seat cushion pad 38 so as to be separated from the lower surface 38A of the seat cushion pad 38 toward the lower side of the seat. The sinking amount of the seat cushion pad 38 is limited. In other words, if the seated occupant's lumbar part further sinks from the initial sinking position of the seat cushion pad 38 (one-dot chain line P in FIG. 2), the lower surface 38A of the seat cushion pad 38 interferes with the beam-like member 56, The above sinking is suppressed. As a result, according to the present embodiment, excessive sinking of the seated occupant's lower back into the seat cushion 18 during a frontal collision can be effectively suppressed.

  Further, in the present embodiment, since the beam-like members 56 are respectively provided below the left and right hip joint root positions of the seated occupant, the seat cushion pad 38 at the portion where the input to the seat cushion pad 38 is the largest is depressed. It is suppressed. As a result, according to the present embodiment, excessive sinking of the seat occupant's waist into the seat cushion 18 at the time of a frontal collision or the like can be more effectively suppressed.

  Further, in the present embodiment, when the occupant sits on the seat cushion 18, the seat cushion pad 38 sinks to the lower side of the seat, and a plurality of S springs 52 disposed on the lower surface 38A of the seat cushion pad 38 extend in the vehicle front-rear direction. The sheet is displaced (bends) while being pulled. Here, in this embodiment, since each beam-like member 56 is disposed in the gap 54 between the S springs 52 adjacent in the sheet width direction, the S spring 52 and the beam-like member 56 do not interfere with each other. For this reason, even if the beam-like member 56 is made of metal, the S spring 52 interferes with the beam-like member 56, so that the spring characteristics are changed and the spring performance is not affected. As described above, according to the present embodiment, it is possible to eliminate an adverse effect caused by the mutual interference between the S spring 52 and the beam-like member 56.

  In the present embodiment, since the vehicle knee airbag device 32 is mounted in the column cover 30 of the steering column of the vehicle 10, the knee airbag 34 is inflated and deployed when a frontal collision or a frontal collision is predicted. Thus, both knees of the seated occupant are restrained by the knee airbag 34.

  On the other hand, when the vehicle knee airbag device 32 is mounted, it is conceivable that the seat occupant's waist easily sinks due to the seat cushion pad 38. For this reason, when the vehicle knee airbag device 32 and the vehicle seat 16 according to the present embodiment are mounted as a set, in addition to protecting both knees of the seated occupant, the lowering of the waist of the seated occupant Is very effective. Thus, in the vehicle 10 equipped with the vehicle knee airbag device 32 and the vehicle seat 16 according to the present embodiment, the occupant protection performance can be further improved.

[Second Embodiment]
Hereinafter, the second embodiment of the vehicle seat and the vehicle according to the present invention will be described with reference to FIG. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 4A and 4B, in the second embodiment, the beam-like member 60 as the subsidence suppressing member is made of a first plate 62 and a second plate 64 which are each made of metal. It is characterized in that it is divided into two. A front end portion 62A of the first plate 62 is fixed to the upper surface portion 44B of the front frame 44, and a long hole 66 having a predetermined length is formed along the longitudinal direction of the rear end portion 62B. On the other hand, the rear end portion (not shown) of the second plate 64 is fixed to the lower outer periphery of the connecting rod 48, and a long hole 68 having a predetermined length is formed along the longitudinal direction of the front end portion 64A. Then, both the long holes 66 and 68 are overlapped, and the first plate 62 and the second plate 64 are connected to each other by the connecting pin 70.

  The state in which the rear end portion of the long hole 66 of the first plate 62 and the rear end portion of the long hole 68 of the second plate 64 are connected by the connecting pin 70 (shown by solid lines in FIGS. 4A and 4B). ) Is the initial factory setting. In addition, the length (full length) of the beam-like member 60 in which the first plate 62 and the second plate 64 in the initial state are combined is the lower surface 38A of the seat cushion 18 when a standard occupant sits on the seat cushion 18. It is set to a length along the one-dot chain line P in FIG. Further, when a tensile load of a predetermined value or more is applied to the connection portion between the first plate 62 and the second plate 64, the connection state by the connection pin 70 is released and the relative movement of the first plate 62 with respect to the second plate 64 is possible. The load (compressive load when caulking the connecting pin 70) is set. Further, the total length of the beam-like member 60 when a load of a predetermined value or more is applied to the connection portion by the connection pin 70 is the lower surface 38A of the seat cushion 18 when a passenger who is heavier than the standard occupant sits on the seat cushion 18 ( The length is set along the two-dot chain line Q) in FIG.

  In the above configuration, the long hole 66 is formed in the rear end portion 62B of the first plate 62 and the long hole 68 is formed in the front end portion 64A of the second plate 64. However, the present invention is not limited to this. A circular hole may be used instead of the long hole.

(Action / Effect)
According to the above configuration, at the time of shipment from the factory, the first plate 62 and the second plate 64 are connected by the connecting pin 70 at the position indicated by the solid line in FIGS. For example, when an occupant with a standard physique sits on the seat cushion 18 from this state, the lower surface 38A of the seat cushion 18 bends, but the lower surface 38A does not interfere with the beam-like member 60. There is no inhibition.

  When a frontal collision occurs from this state, the occupant of the standard physique tends to sink further into the seat cushion 18, so that a tensile load of a predetermined value or more acts on the connecting portion between the first plate 62 and the second plate 64. To do. For this reason, the connection state by the connection pin 70 is cancelled | released. As a result, the first plate 62 moves relative to the second plate 64, and the beam-like member 60 extends in the vehicle front-rear direction. However, when the connecting pin 70 reaches the front end of the long hole 68 of the second plate 64, the relative movement of the first plate 62 with respect to the second plate 64 is stopped. Therefore, further sinking into the seat cushion pad 38 is restricted. In addition, a predetermined energy absorption effect is obtained when the connection state by the connection pin 70 is released.

  On the other hand, when an occupant who is heavier than the occupant of the standard physique sits on the seat cushion 18, some foreign body sensation is generated according to the increased body weight that is larger than the weight of the occupant of the standard physique. When a frontal collision occurs from this state, as in the case described above, the connection state by the connection pin 70 is released, and the first plate 62 moves relative to the second plate 64 to the position indicated by the two-dot chain line, and the beam The member 60 is extended in the vehicle front-rear direction. Therefore, when an occupant heavier than a standard occupant sits on the seat cushion 18, the lower surface 38 </ b> A is restrained from sinking to the bent position when the occupant sits on the seat cushion 18.

  As described above, according to the vehicle seat 16 and the vehicle 10 including the vehicle seat according to the present embodiment, excessive depression of the seated occupant's waist on the seat cushion 18 at the time of a frontal collision is effective with an inexpensive configuration. Can be suppressed. In addition, when an occupant with a standard physique is seated, a predetermined energy absorption effect can be obtained in addition to the effect of suppressing excessive subsidence during a frontal collision or the like.

[Third Embodiment]
Hereinafter, the vehicle seat and the third embodiment of the vehicle according to the present invention will be described with reference to FIG. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 5A and 5B, the third embodiment is characterized in that a cloth-like belt 80 in which an extra length portion 80A is formed is used as a sinking suppression member. is there. Specifically, the belt 80 is made of the same material as the webbing 26. Further, an extra length portion 80 </ b> A is formed at an intermediate portion in the longitudinal direction of the belt 80 by folding the belt 80 and sewing with the suture thread 82. The suture thread 82 is a thread having a strength that breaks when a load of a predetermined value or more is applied. The length of the belt 80 is set in the same manner as in the second embodiment described above, and when the occupant of the standard physique is seated on the seat cushion 18 when the suture 82 is not broken. When the occupant seated on the seat cushion 18 is set to a length along the lower surface 38A (the one-dot chain line P in FIG. 2), and the entire length of the belt 80 when the suture 82 is broken is larger than the standard occupant. Is set to a length along the lower surface 38A (one-dot chain line Q in FIG. 2).

  In the above-described configuration, the intermediate portion of the belt 80 is folded and sewn with the suture thread 82 to form the extra length portion 80A. However, the present invention is not limited to this, and the intermediate portion of the belt is picked up in a loop shape so that the root is the suture thread. The extra length portion may be formed by sewing with.

(Action / Effect)
According to the above configuration, at the time of shipment from the factory, as shown in FIG. 5A, the suture thread 82 is not broken, and therefore, the extra length portion 80 </ b> A exists in the middle portion in the longitudinal direction of the belt 80. For example, when an occupant with a standard physique sits on the seat cushion 18 from this state, the lower surface 38A of the seat cushion 18 bends, but the lower surface 38A does not interfere with the belt 80, so that the seating feeling of the occupant is hindered. Never happen.

  When a frontal collision occurs from this state, the occupant with the standard physique tends to sink further into the seat cushion 18, and a tensile load of a predetermined value or more acts on the suture 82. For this reason, the suture thread 82 is broken and the extra length portion 80A is extended. Thereby, the belt 80 is extended in the vehicle front-rear direction. However, when the belt 80 is fully extended, the belt 80 does not extend any further. Therefore, further sinking into the seat cushion pad 38 is restricted. In addition, a predetermined energy absorption effect can be obtained when the suture state by the suture thread 82 is released (the suture thread 82 is cut).

  On the other hand, when an occupant who is heavier than the occupant of the standard physique sits on the seat cushion 18, some foreign body sensation is generated according to the increased body weight that is larger than the weight of the occupant of the standard physique. When a frontal collision occurs from this state, the suture 82 is broken and the belt 80 is extended as in the case described above. Therefore, when an occupant heavier than a standard occupant sits on the seat cushion 18, the lower surface 38 </ b> A is restrained from sinking to the bent position when the occupant sits on the seat cushion 18.

  As described above, according to the vehicle seat 16 and the vehicle 10 including the vehicle seat according to the present embodiment, excessive depression of the seated occupant's waist on the seat cushion 18 at the time of a frontal collision is effective with an inexpensive configuration. Can be suppressed. In addition, when an occupant with a standard physique is seated, a predetermined energy absorption effect can be obtained in addition to the effect of suppressing excessive subsidence during a frontal collision or the like.

  In each of the above-described embodiments, the vehicle 10 in which the vehicle knee airbag device 32 is mounted on the driver's seat side has been described as an example. However, the present invention is not limited to this. In addition, the present invention can be applied to a vehicle equipped with a vehicle knee airbag device. Further, the present invention is applicable to a vehicle in which a vehicle cushion airbag device is mounted on a seat cushion of a vehicle seat as an occupant protection device. In that case, when a frontal collision occurs, the cushion airbag is inflated and deployed, the front portion of the seat seat surface is lifted, and the inertia movement of the seated occupant toward the vehicle front side is suppressed. Therefore, when the vehicle cushion airbag device is mounted on the vehicle seat, in addition to reducing the amount of inertia movement of the seated occupant to the front side of the vehicle, the depression of the seated occupant's waist is suppressed, It is very effective.

DESCRIPTION OF SYMBOLS 10 Vehicle 16 Vehicle seat 18 Seat cushion 32 Vehicle knee airbag device 34 Knee airbag 38 Seat cushion pad 38A Lower surface 40 Seat cushion frame 52 S spring (seat spring)
54 Clearance 56 Beam-shaped member (sink suppression member)
56C Intermediate part 60 Beam-shaped member (sink suppression member)
62 1st plate 64 2nd plate 66 long hole 68 long hole 70 connecting pin 80 belt (sink suppression member)
80A extra length 82 suture
Position of the underside of the seat cushion when an occupant of P standard size is seated
QFurther down the seat

Claims (5)

A seat cushion pad on which an occupant sits;
A seat cushion frame disposed on the lower side of the seat cushion pad and supporting the seat cushion pad;
A subsidence suppressing member disposed between the front and rear portions of the seat cushion frame and having a surplus length so that the intermediate portion is spaced downward from the lower surface of the seat cushion pad,
Equipped with a,
Furthermore, the subsidence suppression member is arranged along a position further lowered to the seat lower side from the position of the lower surface of the seat cushion pad when a passenger of a standard physique is seated in a side view of the vehicle.
Vehicle seat. The sinking suppression members are respectively provided below the hip joint base positions of the left and right of the seated occupant.
The vehicle seat according to claim 1. Between the front and rear parts of the seat cushion frame, a plurality of seat springs are stretched side by side in the seat width direction along the lower surface of the seat cushion pad,
The subsidence suppression member is disposed between the adjacent seat springs,
The vehicle seat according to claim 1 or 2. The subsidence suppression member is divided into a flexible belt in which a surplus length portion is set to break the suture and extend in the front-rear direction of the sheet when a load of a predetermined value or more is applied, or is divided in the front-rear direction of the sheet It is constituted by plates connected so as to be able to extend a predetermined length when a load of a predetermined value or more acts.
The vehicle seat according to any one of claims 1 to 3. The vehicle seat according to any one of claims 1 to 4,
A knee airbag device for a vehicle equipped with a knee airbag that restrains the knees of a seated occupant during a frontal collision or a frontal collision prediction, or under a seated occupant during a frontal or frontal collision prediction A cushion airbag device for a vehicle equipped with a cushion airbag that inflates and
Vehicle with.