JPH0672198A - Seat device - Google Patents

Abstract

PURPOSE:To provide a seat device giving a driver a stable sitting feeling without strain on his spine so as to get hardly tired even in the case of performing driving operation on the seat for many hours. CONSTITUTION:The upper part 11 and a lower part 13 of the cushion body 10a of a seat back 10 are moved forward by a thorax adjusting mechanism 30 interlocked with the longitudinal movement of a seat cushion 17 so as to be suitably adjusted into the optimum thorax support attitude.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat device that can be adjusted to a sorax support posture that does not burden the spine of a vehicle driver.

[0002]

2. Description of the Related Art Many studies have been conducted on the shape of a seat so as not to give a load to the spine of a seated person. As shown in FIG. 8, the back of the person M when standing upright has a so-called S-shape with the upper rear part of the waist inside. Considering that this posture is the most natural and the spine is not overpowered, it is common to provide the seat 1 with the lumbar support 2 that holds the back of the waist forward as shown in FIG. Moreover, it was believed that this alone provided comfort and reduced fatigue.

On the basis of such an idea, in order to give the seated person a degree of freedom as much as possible, for example, JP-A-59-168816, JP-A-62-159764, etc. Various seat devices have been proposed.

[0004]

However, according to the research conducted by the inventors, such a conventional technique is a theory biased to static observation of merely sitting, and It has been found that it is not always possible to adapt to the dynamic situation in which a certain driver drives a car.

That is, because the driver grips the steering wheel and operates it, it is common to raise the upper body as shown by the arrow in FIG. 10, and then the driver becomes so-called stoop and fixed his waist. If you have a stoop, the abdomen will be pressed and you will have a hard time, so a so-called slippage phenomenon will occur where you push your buttocks forward, and the back of your buttocks will separate from the seat back, and your body will hit the lumbar support 2 too hard. There was a problem that it would press the spine.

As described above, according to the above theory of trying to keep the back of the person M in an S-shape while standing upright, in the case of a driver, the body is rather not supported and becomes unstable, or the conventional lumbar support is used. However, there is a problem in that it is not possible to drive while supporting the spine in a natural state and having a stable seating feeling, and it is easy to get tired when driving for a long time.

The present invention has been made by paying attention to the problems of the prior art as described above. Even when the driver sits for a long time and performs a driving operation, the spine is not overpowered. The purpose of the present invention is to provide a seat device that has a stable seating feeling and is less tired.

[0008]

According to the research conducted by the inventors, when the driver takes a driving posture for a long time, the posture in which the back is rounded and the hips are slightly shifted forward is the most difficult for the spine. It has been verified that it is natural.
In other words, the feeling of sitting varies from person to person, and there is a time factor, and even if you are comfortable first, that comfort does not always last, and if you drive for a long time,
According to the old theory, the driver is not always comfortable and accumulates fatigue due to a long unnatural posture.

Then, as a result of studying what kind of posture the driver takes naturally and the spine is not overloaded, as shown in FIG. 6 showing the curve of the spine of the seated person, the hip point C is at the illustrated position. In this case, in the upper part, it is comfortable to raise the upper body and become a back stoop as shown in the range A, and in the lower part, it is comfortable to move the hips forward as shown in the range B. As a result, it was concluded that the posture shown in FIG. 7 is the one that is most resistant to fatigue, and this state is called the sorax support posture.

The curve of the spine of the seated person shown in FIG.
Ranges A and B shown by hatching and showing the case of the angle line D of the seat back of the most commonly used angle
Indicates the range of the sorax support posture. The vertical and horizontal scales are 50 mm. This curve shows the curve at the seat back angle that is most convenient to use.

In an actual use state, the seat back is used at an angle of about 20 to 45 degrees from the vertical direction as shown in FIG.
When the seat back falls down from the state of, the range of the Sorrax support posture becomes more upright at the upper part and more prominent at the lower part. Becomes

Based on the above conclusion, the gist of the present invention for achieving the above-mentioned object is a seat device (1) that can be adjusted to a sorax support posture that does not impose a burden on the spine of a motor vehicle driver. A seat cushion (17) that is attached to the vehicle body installation site so as to be movable back and forth, and a seat back (10) that is separately supported behind the seat cushion (17) at the vehicle body installation site. ), The seat cushion (17) is attached to the back frame (20) built in the cushion body (10a).
Adjustment mechanism (30) for displacing the cushion body (10a) of the seat back (10) with the forward and backward movement of the vehicle
The solelac adjusting mechanism (30) includes a back adjusting portion (31) provided at a back position where the upper side of the driver's back is in contact with the upper part of the cushion body (10a), and the buttocks of the driver. Buttocks adjustment part (3
5) and an adjustment link (37) for driving the back adjusting part (31) and the hip adjusting part (35) in conjunction with the forward and backward movement of the seat cushion (17), and the back adjusting part (31) ) Is tiltably supported by an upper pivot (32) laterally installed on the back frame (20) and the upper pivot (32), and the cushion body (10a) has an upper portion on the back of the driver. And an upper back support panel (33) for holding in a sorax support posture that is displaced so as to be relatively forward from the back position, and the buttocks adjuster (35) is
A lower pivot (36) provided laterally on the back frame (20) below the upper pivot (32) and a rear side of the driver's hip while being supported by the lower pivot (36) when taking a sorax support posture. And a rear support panel (36) which can be tilted so as to be held from the seat cushion (1), and the adjustment link (37) is movably connected to and supported by the rear end of the seat cushion (17).
The lower link member (38) pivotally supported by the lower pivot shaft (36) at a substantially intermediate portion so as to rotate in the front-back direction in synchronization with the front-rear movement of (7), and the upper end portion of the lower link member (38). An upper link member (39) rotatably supported and supported by the upper pivot shaft (32) so as to rotate in the front-rear direction while being bent forward with respect to the lower link member (38). While the bottom support panel (36) is fixed to the lower side of the lower link member (38), the upper back support panel (33) is fixed to the upper side of the upper link member (39). The seat device (1) is characterized by the following.

[0013]

Operation: The driver of the vehicle is
0) displaces the upper part and the lower part of the cushion body (10a) of the seat back (10), and appropriately adjusts to an optimal sorax support posture that is a natural posture that does not burden the spine, By holding it, it is possible to obtain a stable sitting feeling even when sitting for a long time.

The adjustment of the sorax support posture is performed by moving the seat cushion (17) forward and backward with respect to the vehicle body installation site. That is, when the seat cushion (17) moves forward, the lower end side of the lower link member (38) of the adjustment link (37) is pulled forward, and the lower link member (38) is centered on the lower pivot (36). Rotate. As a result, the hip support panel (36) fixed to the lower side of the lower link member (38) tilts to the front side to bulge the lower portion of the cushion body (10a) corresponding to the hip forward, and Displace your hips from the back to the sorax support posture.

Further, the upper back support panel (33) also tilts in synchronism with the tilting of the hip support panel (36) to displace the upper portion of the cushion body (10a) to the soralux support posture. That is, as the lower link member (38) rotates, the upper link member (3) pivotally supported at the upper end of the lower link member (38).
9) is supported by the upper pivot (32) and is rotated so as to be bent further forward with respect to the lower link member (38). As a result, the upper back support panel (33) fixed to the upper side of the upper link member (39) tilts so as to tilt forward, and the upper part of the cushion body (10a) moves the upper part of the back of the driver from the rear position. The cushion body (10a) is displaced so as to be relatively moved forward, and the cushion body (10a) is held in the sorax support posture.

After the adjustment, that state is maintained unless the seat cushion (17) moves back and forth. In such a sorax support posture, the driver's spine is in a natural posture that does not force the spine of the driver, so that the driver can drive for a long time without fear of injuring his back or the like.

When the seat cushion (17) is moved rearward in order to return to the normal state in the sollux support posture, the hip support panel (36) gradually rises from the forward tilted posture, and accordingly the upper back support panel (36). 33) also tilts backward to the original state and the cushion body (10a) returns to the normal state.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of the present invention. As shown in FIG. 1, the seat apparatus 1 according to the present embodiment is provided with a saw rack adjusting mechanism 30 in a back frame 20 incorporated in a cushion body 10 a of a seat back 10, and the saw rack adjusting mechanism 30 allows a driver of an automobile to drive the vehicle. 6 and 7 that give a natural seating feeling without burdening the spine of the person
It can be adjusted to the soralux support posture shown in.

A seat slide device 2 is provided on the vehicle body floor F.
The seat cushion 17 is mounted so as to be movable back and forth by the drive mechanism 50 independently of the slide device 2 with the seat slide device 2 as a vehicle body installation site. Further, behind the seat cushion 17, the seat back 1 is separately mounted on the seat slide device 2.
0 is supported. The seat device 1 may be directly mounted on the vehicle body floor F as a vehicle body installation site without using the seat slide device 2.

The seat slide device 2 has a pair of rail units 2a, 2a which are arranged below both sides of the seat cushion 17 and extend in the front-rear direction. The rail unit 2a includes a lower rail 4 fixed to the vehicle body floor F via a leg member 5, and an upper rail 3 that is fitted to the lower rail 4 so as to be movable back and forth and supports a seat cushion 17.

The cushion frame 40 built in the seat cushion 17 is supported on the upper rail 3 via a drive mechanism 50 so as to be movable back and forth. Drive mechanism 50
Includes an electric motor 51 fixed to the upper rail 3, a lead screw 52 that is connected to the output shaft of the electric motor 51 and is driven to rotate, and a nut housing 53 that is rotatably engaged with the lead screw 52. It is equipped with. The front end of the lead screw 52 has an upper rail 3
Is rotatably supported by a support bracket 54 fixed to the front end of the. On the other hand, the nut housing 53 is pivotally supported on the front end portion of the cushion frame 40.

As shown in FIG. 3, the cushion body constituting the seat back 10 is provided on both sides so as to prevent the driver's sideward movement and the main back portion 10a against which the back of the seated driver is applied. It is divided into a back side portion 10b. The main back portion 10a and the back side portion 10b are integrally foam-molded from, for example, urethane foam or the like.

As shown in FIGS. 4 and 5, the main back portion 1
0a further includes an upper back portion 11 with which the upper part of the back of the driver abuts, a lower back portion 13 corresponding to the back of the driver's hips, and a center back portion 12 between the upper back portion 11 and the lower back portion 13. Is known to. Between the upper back portion 11 and the center back portion 12, and between the center back portion 12 and the lower back portion 13, bending grooves 16, 1 for facilitating displacement of the main back portion 10a, respectively.
6 is recessed.

As shown in FIG. 1, the back frame 20 for holding the cushion body has side portions 21, 21 on both sides.
And an inverted U-shaped upper pipe 22 connecting the upper ends of both side portions 21, 21. Each side portion 21 is formed of a plate-shaped member as shown in the drawing, and forms side walls 21a, 21a of the back frame 20. Note that holder members 23, 23 for attaching the headrest 25 are fixed to the upper pipe 22.

The lower end of the side portion 21 is supported by the rear end of the upper rail 3 via a reclining mechanism 60. The reclining mechanism 60 includes an arm member 63 that is bolted to the lower end of the side portion 21, a base bracket 61 that is fixed to the rear end of the upper rail 3, and a reclining shaft that pivotally supports the arm member 63 on the base bracket 61 so that the tilt can be adjusted. And 62.

The back side portion 10b of the cushion body is attached to each side portion 21 by the fixing clip 14 so that the back frame 20 surrounds the side wall 21a. Further, the main back portion 10 a is mounted so as to cover the saw rack adjusting mechanism 30 provided on the back frame 20.

As shown in FIG. 1 and FIG. 2, the saw rack adjusting mechanism 30 includes a back adjusting portion 31 provided on the back side of the upper back portion 11 with which the upper side of the driver's back abuts, and a rear portion of the driver's hips. The rear adjustment portion 35 provided on the back side of the underback portion 13 corresponding to the above and the adjustment link 37 that drives the back adjustment portion 31 and the rear adjustment portion 35 in conjunction with the forward and backward movement of the seat cushion 17. .

The back adjusting portion 31 is supported by the upper pivot 32 provided laterally on the back frame 20 and the upper pivot 32 so as to be tiltable, and the upper back portion 11 relatively holds the upper back of the driver from the rear position. It comprises an upper back support panel 33 which is displaced so as to be moved forward and holds the main back portion 10a in a sorax support posture.

The buttocks adjusting portion 35 holds the driver's buttocks from the rear while being supported by the lower pivot 36 and the lower pivot 36 provided laterally on the back frame 20 below the upper pivot 32 and in the sorax support posture. And a hip support panel 36 that can be tilted.

The adjustment link 37 is provided on the hip support panel 36.
Lower link members 38, 38 for supporting the upper back support panel 33 and upper link members 3 for supporting the upper back support panel 33.
9 and 39. More specifically, the lower link member 38 is pivotally supported by a pivot bracket 41 fixed to the rear end of the cushion frame 40 so as to be rotatable in the front-rear direction. Further, the lower link member 38 is pivotally supported on the lower pivot 36 at a substantially middle portion thereof.

A hip support panel 36 is fixedly provided under the lower link members 38, 38 on both sides. The butt support panel 36 is tilted forward in synchronization with the forward / backward movement of the seat cushion 17 by the drive mechanism 50, and displaces the lower back portion 13 so as to bulge forward to bring it into a saw-lux support posture. In this case, the range of tilt of the hip support panel 36, that is, the lower link member 38
As shown in FIG. 6, the rotation range of is set so that the lower part of the spine of the seated driver is located in the range B in which the position is in the thorax posture.

Further, at the upper end of the lower link member 38,
The upper link member 39 is rotatably supported. A guide groove 39a into which the upper pivot 31 is relatively vertically movable and rotatable is formed in a substantially middle portion of the upper link member 39. The upper link member 39 supports the upper link member 39 so as to rotate in the front-rear direction with respect to the lower link member 38 while being bent forward.

An upper back support panel 33 is fixedly installed above the upper link members 39, 39 on both sides. The buttocks support panel 33 tilts in synchronization with the buttocks support panel 36, and displaces the upper back portion 11 so as to bulge forward so that the buttocks support panel 33 is placed in a sorax support posture. In this case, the tilt range of the upper back support panel 33,
That is, as shown in FIG. 6, the rotation range of the upper link member 39 is set so that the upper part of the spine of the seated driver is positioned in the range A in which the position is in the sollux posture.

An intermediate back support panel 34 for holding the center back portion 12 is fixedly provided between the upper pivot 31 and the lower pivot 36. Also, as shown in FIG.
A sorax sensor 70 is provided on the upper rail 3 of the rail unit 2a. Thorax sensor 7
0 indicates that the nut housing 53 has moved to the range where the lower back portion 13 and the like form the sorax support posture.
It is a sensor that detects by detecting the front and rear positions of, and specifically, a general limit switch can be used.

Next, the operation will be described. Car drivers
The seat back 10 is operated by operating the saw racks adjusting mechanism 30.
As shown in FIG. 5, by displacing the lower side of the cushion body, the lower back portion 13 of the cushion body is moved in the direction of the human body to adjust to the sorax support posture to reduce the load on the spine at the time of sitting and to provide a fit feeling. Can be improved.

The adjustment of the posture of the sorax support is performed by moving the seat cushion 17 back and forth with respect to the seat slide device 2. In order to move the seat cushion 17 back and forth, first, the electric motor 51 of the drive mechanism 50 is activated to rotate the lead screw 52 in one direction. When the lead screw 52 rotates, the nut housing 5 is rotatably engaged with the lead screw 52 relatively.
3 moves in the front-back direction, whereby the cushion frame 40 supported by the nut housing 53 moves back-and-forth.

As described above, when the cushion frame 40 is moved slightly forward by the drive mechanism 50 and moved forward, the lower end side of the lower link member 38 pivotally supported at the rear end thereof is pulled forward. The lower link member 38 rotates about the lower pivot 36 as a substantial center. Accordingly, the hip support panel 36 fixed to the lower side of the lower link member 38 tilts forward to swell the lower back portion 13 corresponding to the hip forward, and holds the driver's hip from the rear in a sorax support posture. Shift to.

Further, the upper back support panel 33 also tilts in synchronization with the tilting of the hip support panel 36, thereby displacing the upper back portion 11 to the sorax support posture. That is, as the lower link member 38 rotates, the upper link member 39 pivotally supported on the upper end of the lower link member 38, while being supported by the upper pivot 32, pivots further forward with respect to the lower link member 38. Therefore, the upper link member 3
The upper back support panel 33 fixed to the upper side of 9 tilts so as to tilt forward, and the upper back portion 11 displaces the upper part of the back of the driver so that the upper part of the back of the driver is moved forward relative to the rear position, and the saw rack support is provided. Hold the posture.

When the lower back portion 13 and the like move to a position forming the slacks support posture, the nut housing 53 has moved to the detection range of the slacks sensor 70, and a signal is output from the slacks sensor 70. If a proper display is given to the driver or the like based on the signal, the driver or the like can objectively judge that the driver is in the thorax posture. This eliminates the problem that the driver is not accustomed to the sorax support posture due to unfamiliarity or illusion, and the adjustment to the soralux support posture is reliably performed.

When the seat cushion 17 is moved backward by rotating the rolling motor 51 of the driving mechanism 50 in the reverse direction in order to return to the normal state in the sorax support posture,
The hip support panel 36 gradually rises from the forward tilted posture, and accordingly, the upper back support panel 33 tilts backward to the original state, and the cushion body 10a returns to the normal state.

In the above embodiment, the above-mentioned saw-lux sensor 70 is provided to ensure the adjustment to the posture of the saw-lux support. However, instead of this or together with this structure, the saw-lux sensor 70 is provided at an appropriate position on the surface of the apparatus. Lower back part 13
It is also possible to form a scale or an indicator line showing a preferable angle range such as.

[0042]

According to the seat apparatus of the present invention, the soralux adjusting mechanism interlocking with the forward and backward movement of the seat cushion advances the upper and lower parts of the cushion body of the seat back to appropriately optimize the soralux support. Since the posture can be adjusted and the driver can maintain a natural posture that does not strain the spine of the driver, the driver does not accumulate fatigue even when sitting for a long time. Can drive.

[Brief description of drawings]

FIG. 1 is a perspective view showing a seat device according to an embodiment of the present invention.

FIG. 2 is a side view showing a seat device according to an embodiment of the present invention.

FIG. 3 is an exploded perspective view showing a cushion body of a seat back constituting a seat device according to an embodiment of the present invention.

FIG. 4 is a side view showing a main back portion of the seat device according to the embodiment of the present invention.

FIG. 5 is an operation explanatory view showing the main back portion of the seat device according to the embodiment of the present invention.

FIG. 6 is a diagram for explaining a sorax support posture.

FIG. 7 is a diagram for explaining a sorax support posture.

FIG. 8 is a diagram for explaining the state of the spine of the human body in the upright posture.

FIG. 9 is a diagram for explaining a support posture in a conventional seat device.

FIG. 10 is a diagram for explaining a support posture in a conventional seat device.

[Explanation of symbols]

 1 ... Seat device 10 ... Seat back 11 ... Upper back part 12 ... Center back part 13 ... Lower back part 17 ... Seat cushion 20 ... Back frame 30 ... Sorlux adjustment mechanism 31 ... Back adjustment part 35 ... Butt adjustment part 33 ... Adjustment link 40 ... Cushion frame 50 ... Drive mechanism

Claims (1)

[Claims] 1. A seat device that can be adjusted to a sorax support posture that does not give a burden to the spine of a driver of a vehicle, and a seat cushion that is attached to a vehicle body installation site so as to be movable back and forth, and a seat cushion behind the seat cushion. A seat back that is separately supported on a vehicle body installation site, and a soralux adjustment mechanism that displaces the cushion body of the seat back with the back-and-forth movement of the seat cushion is provided in a back frame built in the cushion body of the seat back. The sora Lux adjusting mechanism includes a back adjusting portion provided at a back position where the upper side of the back of the driver comes into contact with the upper part of the cushion body, and a butt adjusting position provided at a position corresponding to the back of the butt of the driver. And an adjustment link for driving the back adjustment part and the hip adjustment part in conjunction with the forward and backward movement of the seat cushion, The adjuster is supported by an upper pivot that is laterally provided on the back frame and is tiltably supported by the upper pivot so that the upper part of the cushion moves the driver's upper back relatively forward from the rear position. A back support panel for holding the slacks support posture to be displaced, wherein the buttocks adjusting portion has a lower pivot disposed laterally on the back frame below the upper pivot, and the lower pivot when the soles support posture is taken. And a rear support panel that is tiltable so as to hold the rear of the driver from behind, and the adjustment link is supported by the rear end of the seat cushion so that it can be pushed and pulled, and the front and rear of the seat cushion. A lower link member pivotally supported by the lower pivot shaft at a substantially intermediate portion so as to rotate in the front-rear direction in synchronization with movement, and rotatable on an upper end portion of the lower link member. An upper link member that is pivotally supported and that is supported by the upper pivot to turn in the front-back direction in a state of being bent forward with respect to the lower link member, and the hip support panel below the lower link member. The seat device, wherein the back support panel is fixed on the upper side of the upper link member.