WO2012011452A1

WO2012011452A1 - Cushion-material support mechanism and seat

Info

Publication number: WO2012011452A1
Application number: PCT/JP2011/066284
Authority: WO
Inventors: 藤田　悦則; 坂本　豊
Original assignee: 株式会社デルタツーリング
Priority date: 2010-07-18
Filing date: 2011-07-18
Publication date: 2012-01-26
Also published as: JP2012041031A

Abstract

Disclosed is a fixed-type seat, the seat back of which does not recline, which can take on a normal orientation and a rest orientation (corresponding to a normal reclined orientation). A cushion-material support mechanism which supports a seat cushion material (400) is provided on a cushion frame. Said cushion-material support mechanism has a slide frame (310) that has elongated guide holes (311 and 312) set such that the slide frame can slide diagonally upward/backward and downward/forward with the seat cushion material (400) supported. Since the slide frame slides diagonally downward/forward, although the seat inclination does not change, the seat cushion material (400) moves forward, causing the torso angle of the person sitting in the seat to increase, effectively resulting in a posture similar to that which results when a conventional seat back reclines.

Description

Cushion material support mechanism and seat

The present invention relates to a cushion material support mechanism applied to a seat used when a plurality of floors are installed at predetermined intervals on the floor, and a seat provided with the cushion material support mechanism, in particular, an aircraft, a train, a ship, The present invention relates to a cushion material support mechanism that can be applied to a seat in a vehicle such as a bus or the like, and can also be applied to a seat used in a movie theater or a theater, and a seat provided with the cushion material support mechanism.

In aircraft and the like, a number of seats are arranged in a row in the vertical direction, and a predetermined number of seats are arranged in a limited space. Therefore, the seating space for each passenger is also limited to a predetermined size, especially when reclining the seat back in the front seat and tilting backward, the space for placing the seated person's legs in the rear seat is greatly limited, There is a problem of impairing comfort. For this reason, in an aircraft or the like, in order to improve passenger comfort, a device for ensuring a wider seating space including a leg arrangement space with the front seat is required. In view of this point, the present applicant, as Patent Documents 1 and 2, allows the cushion frame to be displaced between the rear position and the front position, thereby taking a normal posture and a resting posture without tilting the back frame backward. Therefore, a seat structure that does not limit the seating space including the leg placement space of the rear seat is proposed.

JP 2007-181617 A JP 2007-236554 A

According to the structures of Patent Documents 1 and 2, the back frame can be rested without tilting backward, but when the cushion frame is in the front position, the seating surface angle of the cushion frame is in the rear position. It is a structure that becomes larger than the time. For this reason, when it was in a resting posture, the inclination angle (cy-angle) of the thigh was increased, and some users felt pressure on the abdomen. Also, when shifting from the normal posture to the resting posture, the seated person steps on the leg and pushes out the buttocks forward. However, in Patent Documents 1 and 2, since the seating surface angle increases, A certain force is required to push the forward.

The present invention has been made in view of the above, and in a fixed type in which the seat back does not recline, it can take a normal posture and a resting posture (corresponding to a normal backward leaning posture), and has taken a resting posture. It is an object to provide a cushion material support mechanism and a seat using the cushion material support mechanism that do not give a feeling of pressure on the abdomen and can reduce the force required to shift to a resting posture than before. And

In order to solve the above problems, a cushion material support mechanism according to the present invention includes a back frame and a cushion frame, and supports a cushion material for a seat cushion in a stationary frame in which the back frame is not reclining. A cushion material support mechanism, comprising a slide frame having a slide direction set so as to be slidable between a rear oblique upper and a front oblique lower in a state where the seat cushion cushion material is supported. And

A pair of slide frames provided at a predetermined interval in the width direction is engaged with each of a pair of side frames of the cushion frame of the gantry frame, and each slide frame is engaged with each side frame. It is preferable to have a configuration that can slide in the sliding direction. Each of the slide frames has a guide hole formed in a long hole shape, and the guide hole is provided so as to be lowered forward, and is relatively guided by the guide hole to each side frame of the cushion frame. It is preferable that a guide pin is provided. It is preferable that the sliding direction of the slide frame is in a range of 10 degrees or less in a front downward angle with respect to a plane parallel to the floor.

The lower end edge of the seat back cushion material supported by the back frame is connected to the rear connection shaft spanned between the rear portions of the pair of slide frames or the rear portion of the seat cushion cushion material, and the slide It is preferable that the lower end edge of the seat back cushion material is displaced in accordance with the displacement of the frame.

At the front edge of the cushion frame of the gantry frame, a pair of arm portions that can be turned up and down around the base end portion are provided. A thigh support mechanism including a thigh support frame for supporting the slide frame, and a slide arm that is rotatable up and down around a base end portion is connected to a front end portion of each slide frame, It is preferable that the slide arm is configured to slide relative to the thigh support frame as the slide frame slides. It is preferable that the thigh support mechanism is elastically supported by a torsion bar disposed between the base end portions of the arm portions at the front edge portion of the cushion frame of the gantry frame.

Further, the seat of the present invention is characterized by including any one of the cushion material support mechanisms described above. The cushion material for the seat cushion supported by this cushion material support mechanism has a load-deflection characteristic when the center of the pressure plate having a diameter of 98 mm is aligned with the hip point in the cushion material for the seat cushion and is pressurized to 500 N. Preferably, it has a non-linear characteristic in which the deflection is 70 N or less at 500 N, the spring constant is 5 N / mm or less when the deflection is 30 mm or less, and the spring constant is 10 N / mm or more when the deflection is 40 mm or more. It is preferable to apply to a plurality of seats installed at predetermined intervals in the front and rear. In particular, the seat of the present invention is preferably provided on the vehicle floor at predetermined intervals.

In the present invention, the back frame is provided in a fixed manner so that the angle with the cushion frame does not change, and the cushion frame is provided with a cushion material support mechanism for supporting the cushion material for the seat cushion. However, it has the slide frame set so that it may slide between back diagonally upper direction and front diagonal lower direction, supporting the cushion material for seat cushions. That is, the sliding direction of the slide frame is set to be the front downward direction. Therefore, when the slide frame slides diagonally forward and downward from the normal posture, a resting posture can be taken. In this case, the seat frame angle does not change because the slide frame slides with the cushion material for the seat cushion supported diagonally forward. Although the seat cushion angle does not change, the seat cushion cushion material moves forward, so the seating person's torso angle increases, and the posture is substantially the same as when the conventional seat back is tilted backward. Become. In addition, the seat angle does not change and the sighing angle does not increase even when resting, so the torso-syangle (the angle between the torso line and the thigh) increases and the abdomen feels pressure. Also disappear.

In addition, since the sliding direction of the slide frame when changing from the normal posture to the resting posture is the front lowering direction, the force that the seat occupant pushes the buttocks forward to slide forward may be smaller than conventional, Operation becomes easy.

FIG. 1 is an external perspective view of a seat according to an embodiment of the present invention as viewed from the front side. FIG. 2 is a view showing a frame structure of the seat of FIG. FIG. 3 is an exploded perspective view of a main part of the seat according to the embodiment. 4A is a view showing a state of the cushion material for the seat cushion and the cushion support mechanism in the normal position, and FIG. 4B is a cushion material for the seat cushion and the cushion in the resting posture (reclining posture). It is the figure which showed the state of the support mechanism for use. FIG. 5A is a view showing a state of the cushion support mechanism in the normal position, and FIG. 5B is a view for the cushion when the left seat in the drawing is in a resting posture (reclining posture). It is the figure which showed the state of the support mechanism. FIG. 6A is a view showing a cushion material for a seat cushion, a cushion support mechanism, a cushion material for a seat back, and a seated person in a normal position, and FIG. 6B is a resting posture (reclining posture). ) Is a diagram showing the cushion material for seat cushion, the support mechanism for cushion, the cushion material for seat back, and the state of the seated person. FIG. 7 is a diagram showing the load-deflection characteristics when the seat of this embodiment and the seat of a conventional first class aircraft are pressed by a pressure plate having a diameter of 98 mm. FIG. 8 is a diagram showing a temporal change in the degree of fatigue calculated from the fingertip volume pulse wave. FIG. 9 is a diagram showing temporal changes in calf surface blood flow. FIG. 10 is a diagram showing the HF / LF / HF component variation obtained by wavelet analysis of the fingertip volume pulse wave. FIG. 11 is a diagram showing temporal changes in the electroencephalogram distribution rate.

Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG. 1 is a perspective view of an external appearance of a seat (aircraft cabin seat) 1 according to an embodiment of the present invention as viewed from the front side, and FIG. It is the figure which showed the frame structure of the seat 1 which removed the cushion material 200 for seat backs.

As shown in FIG. 2, the gantry frame 10 of the seat 1 has a back frame 20 and a cushion frame 30, which are fixed to a vehicle floor by leg frames 40. The back frame 20 is fixed so as not to recline, that is, provided so that the angle formed with the cushion frame 30 does not change.

The cushion frame 30 is provided with a cushion material support mechanism 300. The cushion material support mechanism 300 has a pair of slide frames 310, 310 provided at upper portions of the side frames 31, 31 of the cushion frame 30 at a predetermined interval in the width direction of the cushion frame 30.

As shown in FIGS. 2 and 3, the slide frames 310 and 310 are provided with two elongated guide holes 311 and 312 near the front end and the rear end. On the other hand,

brackets

313a and 314a projecting upward at a predetermined interval are attached to the front and rear sides of the side frames 31 and 31 of the cushion frame 30, and guide

pins

313 and 314 are attached to the

brackets

313a and 314a. The guide pins 313 and 314 are engaged with and guided by the guide holes 311 and 312 described above.

Here, the side frames 31 and 31 are formed so that their upper edges are not horizontal in a side view, the rear position is high and the front position is low (see FIG. 4). For this reason, the guide pins 313 and 314 attached to the

brackets

313a and 314a are also positioned higher than the guide pins 313 located at the front portion of the guide pins 314 located at the rear portion. Thereby, the slide frames 310 and 310 with which the guide holes 311 and 312 engage with the guide pins 313 and 314 are provided so as to be inclined forward and downward in a side view. Therefore, the long hole-shaped guide holes 311 and 312 are also provided so as to be inclined forward and downward as viewed from the side. As a result, the slide frames 310 and 310 slide between the rear diagonally upward and the front diagonally downward. That is, when the slide frames 310 and 310 move forward, they are in the forward downward direction. This forward descending angle (angle with respect to the plane parallel to the floor in FIG. 6A) is preferably 10 degrees or less, more preferably in the range of 2 to 8 degrees, and most preferably in the range of 3 to 6 degrees. . The structure is not limited to this as long as the slide frames 310 and 310 can be slid between the obliquely upward and obliquely downward directions. For example, it is not essential that the upper edges of the side frames 31 and 31 are inclined. .

Locking

claws

315 and 315 are attached to the inner side surfaces of the side frames 31 and 31, respectively (see FIGS. 3 and 6). The locking

claws

315 and 315 are connected by connecting rods 316 between the front ends.

Lock grooves

315a and 315a that are notched downward from the upper edge are provided near the rear ends of the locking

claws

315 and 315, and slide

frames

310 and 310 are provided in the

lock grooves

315a and 315a. The lock pins 317 and 317 provided on the

brackets

317a and 317a attached to the lower side are locked by being engaged with each other. An unlocking lever 318 is connected to one end of the connecting rod 316. When the unlocking lever 318 is moved upward, the rear end side of the locking

claws

315 and 315 is lowered downward, and the locking claws Lock pins 317 and 317 are detached from 315 and 315. When the hook is moved forward with the lock pins 317 and 317 detached from the

lock grooves

315a and 315a, the lock pins 317 and 317 move forward along the

upper edges

315b and 315b of the locking

claws

315 and 315. To do. On the other hand, when the seated person stands up, the lock pins 317 and 317 are moved backward by a predetermined amount to fall into the

lock grooves

315a and 315a, thereby being locked again. That is, one end of a return spring 319 is engaged with the lock pins 317 and 317, and the other end of the return spring 319 is engaged with the vicinity of the rear portion of the gantry frame 10, for example, the rear end portion of the side frame 31. Has been. Thereby, when the seated person stands up, the lock pins 317 and 317 move backward.

Here, in the present embodiment, the front edge of the cushion frame 30 is provided with a thigh support mechanism. Specifically, the thigh support mechanism includes a torsion bar 35 supported between

brackets

32a and 32a attached to the front edge frame 32 positioned at the front edge portion at a predetermined interval, and both ends of the torsion bar 35. The

arm portions

36 and 36 are connected to each other, and the thigh support frame 37 is disposed between the distal end portions of the

arm portions

36 and 36. As a result, the thigh support frame 37 always supports the thigh of the seated person so as to urge the thigh from below from above by the elastic force of the torsion bar 35. The elastic force of the torsion bar 35 imparts stability to the sitting posture by urging the thigh from below, and also contributes to vibration absorption and shock absorption. In addition, the

arm parts

36 and 36 and the thigh support frame 37 may be formed as an integral frame formed in a substantially U shape instead of connecting different members.

Since the above-described thigh support mechanism is provided at the front edge of the cushion frame 30, slide

arms

320 and 320 are provided at the

front end portions

310a and 310a of the slide frames 310 and 310, respectively. A front connection shaft 331 is inserted between the

base end portions

320a and 320a of the

slide arms

320 and 320, and each end portion of the front connection shaft 331 is connected to the

front end portions

310a and 310a of the slide frames 310 and 310. Thereby, the

slide arms

320 and 320 can be rotated up and down.

Long holes

321 and 321 are formed in the

slide arms

320 and 320 along the front-rear direction. Then, the above-described thigh support frame 37 is inserted into the

long holes

321 and 321 so that the

arm portions

36 and 36 are positioned outside the

long holes

321 and 321, so that the slide frames 310 and 310 are formed. When sliding in the front-rear direction, the

slide arms

320, 320 slide in the front-rear direction with respect to the thigh support frame 37.

Between the

slide arms

320, 320, a cover arm 330 formed in a flat and substantially cylindrical shape is provided. The hollow portion 330a of the cover arm 330 is also provided in a long hole shape in a side view, and the thigh support frame 37 is inserted into the hollow portion 330a. Each end portion of the cover arm 330 is connected to the

slide arms

320 and 320 to maintain a distance between the

slide arms

320 and 320 and to ensure a predetermined strength.

The cushion material support mechanism 300 supports a cushion material 400 for seat cushion (see FIG. 6). The cushion material 400 for the seat cushion is stretched between the rear connection shaft 332 (see FIG. 3) provided between the

rear ends

310b and 310b of the slide frames 310 and 310 and the front connection shaft 331 described above. A base net 410 made of a two-dimensional net material or a three-dimensional solid knitted fabric, and an upper portion of the base net 410, the rear edge portion is supported by the rear connection shaft 332, and the front edge portion is a cover between the

slide arms

320 and 320. And a surface cushion material 420 supported so as to cover the arm 330 from the upper surface side to the lower surface side. As a result, the seat cushion cushion material 400 slides in the same direction as the slide frames 310 and 310 slide between the diagonally upper rear and the diagonally lower front. The surface cushion material 420 is composed of any one of a three-dimensional knitted fabric, urethane foam, bead foam, or a laminate of two or more of these.

Here, the cushion material 400 for the seat cushion preferably has the characteristics shown in FIG. That is, the deflection amount is 70 mm or less at a load of 500 N, the spring constant is 5 N / mm or less when the deflection amount is 30 mm or less, and the nonlinear characteristic is that the spring constant is 10 N / mm or more when the deflection amount is 40 mm or more. However, details will be described later.

The back frame 20 supports a seat back cushion material 200. The seat back cushion material 200 includes a base net 210 that is hung between the upper frame 21 of the back frame 20 and the rear connection shaft 332 provided between the

rear ends

310b and 310b of the slide frames 310 and 310 described above. And a surface cushion material 220 that covers the base net 210. Since the base net 210 is connected to the rear connection shaft 332, the lower part of the base net 210 protrudes forward as the slide frames 310 and 310 move forward (see FIG. 6B). . The surface cushion material 220 is connected to the base net 210 by sewing or the like so as to follow the movement of the base net 210. Further, the lower edge portion of the base net 210 of the seat back cushion material 200 may be connected to the base net 410 itself of the seat cushion cushion material 400 by sewing or the like instead of the rear connecting shaft 332 described above.

Next, the operation of this embodiment will be described. In the normal posture, as shown in FIGS. 4A, 5A, and 6A, the slide frame 310 and the slide arm 320 of the cushion material support mechanism 300, and the cushion material 400 for the seat cushion are used. , Both are located at the rearmost position. That is, as shown in FIG. 6A, the guide pins 313 and 314 of the slide frame 310 are located at the rearmost position in the guide holes 311 and 312, and the lock pin 317 is engaged with the lock groove 315a of the locking claw 315. Locked together. In this posture, when the seated person extends the leg portion, the slide arm 320 and the cover frame 330 rotate downward against the elastic force of the thigh support frame 37. At this time, since the thigh support frame 37 is located in front of the long hole 321 of the slide arm 320 and the hollow portion 330a of the cover arm 330, the front end edges of the slide arm 320 and the cover arm 330 from the torsion bar 35. Therefore, the elastic force by the torsion bar 35 is felt relatively hard, the thigh is supported firmly, and the normal upright posture can be easily maintained.

When shifting from the normal posture to the resting posture (relaxing posture), as shown in FIG. 4B, the unlocking lever 318 is pulled upward. Accordingly, the rear end portion of the locking claw 315 is lowered, and the lock pin 317 is detached from the lock groove 315a. In this state, when the seated person shifts the buttocks forward, the lock pin 317 moves forward and obliquely downward along the upper edge 315b of the locking claw 315. Along with this, the cushion material 400 for the seat cushion also slides forward and obliquely downward.

When the thigh support frame 37 reaches the rear of the elongated hole 321 of the slide arm 320 and the hollow portion 330a of the cover arm 330 and reaches the rear of the guide pins 313 and 314 in the guide holes 311 and 312 of the slide frame 310, Sliding forward and diagonally downward stops. Since the slide frame 310 is inclined forward and downward, the force that pushes the collar forward can be easily slid with a smaller force than before.

At this time, the cushion material 200 for the seat back protrudes forward together with the slide frame 310. Thereby, even if a seated person's buttocks, a pelvis, and a waist | hip | lumbar part slide ahead, the part from a buttocks to a waist | hip | lumbar part can be supported from back, and a resting posture (relaxing posture) can be supported stably. In addition, when positioned at the most forward and obliquely lower position, as shown in FIG. 6B, the torso angle is larger than the normal position, although the sigh angle does not change. Since the rhino angle does not change and only the torso angle changes, the torso-sai angle, which is the angle between the two, becomes large, and it is possible to shift to a resting posture without feeling pressure on the abdomen.

In the resting position, since the thigh support frame 37 is located behind the long hole 321 of the slide arm 320 and the hollow portion 330a of the cover arm 330, the front edge of the slide arm 320 and the cover arm 330 from the torsion bar 35. Is relatively far from the normal position. For this reason, the elastic force by the torsion bar 35 is felt relatively soft, and a feeling of support suitable for a relaxed posture is obtained.

In the resting position, the buttocks are moved backward, or the buttocks are separated from the cushion material 400 for the seat cushion by standing up. As a result, the lock pin 317 moves rearward along the upper edge 315b of the locking claw 315 by the return force of the return spring 319, whereby the slide frame 310 automatically moves rearward. When moved backward by a predetermined amount, the lock pin 317 applies a special external force to the lock groove 315a because the lock groove 315a is cut away from the upper edge portion in the vicinity of the rear end portion of the lock claw 315. Even if you do not, you will be depressed and locked in the normal position.

(Test example)
FIG. 7 shows the cushion material support for the seat 1 of the present embodiment so as to correspond to the normal posture (upright posture: the state of FIG. 6A) and the resting posture (relaxed posture: the state of FIG. 6B). This is a load-deflection characteristic when the mechanism 300 and the cushion material for seat cushion 400 are set, and the center of the pressure plate having a diameter of 98 mm is aligned with the hip point in the seat cushion cushion material 400 and pressurized to 500 N. . Further, the same measurement was performed for a conventional first class seat (1st class seat) used in an aircraft, and the load-deflection characteristic is shown in FIG. 7 is representative data indicating a load-deflection characteristic when a human buttocks is pressurized to 100 N with a pressure plate having a diameter of 98 mm.

FIG. 7 shows that all of them have the same inclination as the buttocks muscle characteristic, but there is a large difference in the way of deflection from the vicinity where the load exceeds 120N.

That is, in the seat 1 of the present embodiment, both “upright” and “relax” have a deflection amount of 70 mm or less, preferably 65 mm or less at a load of 500 N, and if the deflection amount is 30 mm or less, the spring constant is 5 N / mm or less, preferably It has a non-linear characteristic that changes in the range of 1 to 5 N / mm and changes in a spring constant of 10 N / mm or more, preferably 10 to 20 N / mm when the deflection amount is 40 mm or more. On the other hand, in the conventional 1st class seat, the deflection amount with a load of 500 N is about 75 mm, and the spring constant remains as low as 5 N / mm up to around the deflection amount of 60 mm. .

8 to 11 show a case where two healthy male subjects in their 30s sit on the seat 1 of the present invention in an upright posture and a relaxed posture, and a basic posture (relaxed posture) on a conventional 1st class seat. This figure shows the fatigue level, the surface blood flow of the pelvis, the HF / LF / HF component variation, and the electroencephalogram distribution rate when seated on the head.

The fingertip plethysmogram is measured with a fingertip plethysmograph (Amco Finger Clip Probe SR-5C), and the fatigue level is the integrated value of the power of the finger plethysmogram (this It was determined based on the international publication number proposed by the applicant: WO 2005/039415) and a sensory evaluation method. The sensory evaluation used Borg's index that is highly correlated with the integral electromyogram. The surface blood flow of the calf was measured with a blood flow collection device (Laser blood flow meter CDF-2000 manufactured by Cyber Farm Co., Ltd.).

Looking at the time change of the fatigue level calculated by the fingertip plethysmogram shown in FIG. 8, the progress of fatigue in the upright posture and the relaxed posture of this embodiment was equally small, and the fatigue level was large in the 1st class seat. .

FIG. 9 shows the temporal change in calf surface blood flow. The change in blood flow between the upright posture and the relaxed posture is small and stable. On the other hand, in the 1st class seat, it is considered that the change in blood flow volume became large when 1200 seconds passed, and the subject's unconscious body movement occurred. This was caused by a change in the slope in the same time zone in the fatigue curve of FIG. 8 (arrow a). FIG. 10 shows the HF / LF / HF component variation obtained by wavelet analysis of the fingertip volume pulse wave. The upright posture in the seat 1 of the present embodiment is parasympathetic, and is induced to a relaxed state, and micro sleep occurs at two timings of 900 seconds and 1200 seconds. The relaxed posture on the seat 1 creates a well-balanced state of sympathetic nerves and parasympathetic nerves, and relaxes to a state of high arousal level, suggesting the possibility of a fatigue recovery effect.

On the other hand, in the 1st class seat, after being guided to a relaxed state, the subject entered a sleep state, but it was highly possible that the subject suffered pain and awakened midway. From the onset of sympathetic burst waves in 1200 to 1500 seconds, it is considered that body movement was caused by pain. This also suggests that some change occurred in the body of the subject in the same time zone as FIG. 8 and FIG. FIG. 11 shows the time change of the electroencephalogram distribution rate. In the 1st class seat, the distribution rate of the θ wave always exceeds 20%, which is considered to be a sleep state. It should be noted that the difference between the seat 1 and the first class seat of the present embodiment is remarkably the difference in cushion stroke shown in FIG. 7, and the difference generated in the comparison index is considered to be caused by the difference in cushion stroke. In the experience, the 1st class seat is buried by moving the center of gravity and requires muscle strength to change posture, compression of the peripheral nervous system,

In the above description, the case where the present invention is applied to an aircraft cabin is taken as an example. However, the present invention is not limited to an aircraft but can be applied to a vehicle seat such as a train, a ship, and a bus. Further, the present invention can also be applied to a plurality of seats provided at predetermined intervals before and after in a movie theater or a theater.

DESCRIPTION OF SYMBOLS 1 Seat 10 Base frame 20 Back frame 200 Seat back cushion material 210 Base net 220 Surface cushion material 30 Cushion frame 35 Torsion bar 36 Arm part 37 Thigh support frame 40 Leg frame 300 Cushion material support mechanism 310 Slide frame 315 Lock Claw 317 Lock pin 318 Unlocking lever 319 Return spring 320 Slide arm 330 Cover arm 331 Front connection shaft 332 Rear connection shaft 400 Seat cushion cushion material 410 Base net 420 Surface cushion material

Claims

In the gantry frame that has a back frame and a cushion frame and is fixed so that the back frame does not recline, a cushion material support mechanism that supports a cushion material for a seat cushion,
A cushion material support mechanism, comprising: a slide frame having a slide direction set so as to be slidable between a rear oblique upper side and a front oblique lower side in a state where the seat cushion cushion material is supported.
A pair of slide frames provided at a predetermined interval in the width direction is engaged with each of a pair of side frames of the cushion frame of the gantry frame, and each slide frame is engaged with each side frame. The cushion material support mechanism according to claim 1, which is slidable in a sliding direction.
Each of the slide frames has a guide hole formed in a long hole shape, and the guide hole is provided so as to be lowered forward, and is relatively guided by the guide hole to each side frame of the cushion frame. The cushion material support mechanism according to claim 1, wherein a guide pin is provided.
The cushion material support mechanism according to any one of claims 1 to 3, wherein a sliding direction of the slide frame is in a range of 10 degrees or less in a forward downward angle with respect to a plane parallel to the floor.
The lower end edge of the seat back cushion material supported by the back frame is connected to the rear connection shaft spanned between the rear portions of the pair of slide frames or the rear portion of the seat cushion cushion material,
The cushion material support mechanism according to any one of claims 1 to 4, wherein a lower end edge of the cushion material for the seat back is displaced in accordance with the displacement of the slide frame.
At the front edge of the cushion frame of the gantry frame, a pair of arm portions that can be turned up and down around the base end portion are provided. A thigh support mechanism having a thigh support frame to support
A slide arm that is pivotable up and down around the base end portion is connected to the front end portion of each slide frame, and the slide arm moves relative to the thigh support frame as the slide frame slides. 6. The cushion material support mechanism according to claim 1, wherein the cushion material support mechanism is configured to slide.
The thigh support mechanism is a front edge portion of a cushion frame of the gantry frame, and is elastically supported by a torsion bar disposed between the base end portions of the arm portions. Cushion material support mechanism.
A seat comprising the cushion material support mechanism according to any one of claims 1 to 7.
The cushion material for the seat cushion supported by the cushion material support mechanism has a load-deflection characteristic when the center of the pressure plate with a diameter of 98 mm is pressed to 500 N with the center of the cushion material for the seat cushion being directly below the hip point. 9. A non-linear characteristic wherein the deflection is 70 N or less at 500 N, the spring constant is 5 N / mm or less when the deflection is 30 mm or less, and the spring constant is 10 N / mm or more when the deflection is 40 mm or more. Sheet.
The sheet according to claim 8 or 9, wherein a plurality of sheets are installed at predetermined intervals before and after.
The seat according to claim 10, wherein the seat is provided at predetermined intervals on the floor of the vehicle.