JPH0672219A - Seat device - Google Patents

Abstract

PURPOSE:To provide a seat device which provides a driver tireless and comfortable sitting feeling. CONSTITUTION:A adjustment mechanism 20 is provided on a back frame 13 and the thorax adjustment mechanism 20 is provided with an upper part supporting member 21 which is attached on the upper part of the back frame 13 and tiltably supports a back upper part 10, a lower part supporting member 22 which is attached on the lower part of the back frame 13 and tiltably supports tire back lower part 12, and a rotary link 31 which is swingably attached at the center of the side part of the back frame 13 and driven by a drive source such as a manual force. The seat device is constituted by coupling links 32, 33 which are extended from the upper part supporting member 21 or a lower part supporting member 22 and coupled with a rotary link 31 so that the back upper part 10 or the back lower part 12 is tilted to the forward position for forming a Solex support posture, as the rotary link 31 is rotated in tone operational direction.

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 position to give a driver of a vehicle a comfortable seating feeling.

[0002]

2. Description of the Related Art There have been many studies on the shape of a seat for giving a seated person a comfortable sitting feeling. As shown in FIG. 6, the back of the person M when standing upright has a so-called S-shape with the upper rear part of the waist inside. It is the most natural way to keep this posture and it is not difficult for the spine. Therefore, as shown in FIG. 7, the seat 1 is generally provided with a lumbar support 2 that holds the back of the waist forward. 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 for the driver to raise his / her upper body as shown by the arrow in FIG. 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 should take naturally and the spine should not be overloaded, as shown in FIG. 4 showing the curve of the spine of the seated person, the hip point C is located 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. Based on the conclusion that holding as shown in FIG. 5 is the most fatigue-prone posture, this state was 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 in an angle range of about 20 to 45 degrees from the vertical, as shown in FIG.
When the seat back falls down from the state of above, 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 capable of adjusting to a sorax support posture which gives a comfortable seating feeling to a driver of a vehicle, The back cushion (10) against which the upper part of the back of the driver hits the cushion body of the back.
And the back middle part (1
1) and the lower back (1
2) and the back middle part (11) is fixed to the back frame (13) of the seat back, while the back upper part (10) or the back lower part (12) is attached to the back frame (13). A solux adjusting mechanism (20) for tilting displacement is provided, and the solux adjusting mechanism (20) is tiltably attached to an upper portion of the back frame (13) so that the back upper portion (10) can be tilted. An upper support member (21) for supporting and a lower support member (2) tiltably attached to the lower part of the back frame (13) to tiltably support the lower back part (12).
2), a rotary link (31) swingably attached to the center of the side portion of the back frame (13) and driven by a drive source such as human power, and rotation of the rotary link (31) in the operating direction. The upper support member (21) so that the upper back member (10) together with the upper support member (21) tilts to a forward position forming a sorax support posture.
An upper connecting link (32) extending from the lower end of the rotary shaft and having a tip connected to the rotary link (31), and the rotary link (3).
The lower support member (2) is rotated with the rotation of (1) in the operating direction.
2) A lower connecting link extending from the upper end of the lower supporting member (22) and having a front end connected to the rotating link (31) so that the lower back part (12) tilts to a front position forming a sorax support posture together with 2). (33) and a seat device characterized by the following.

[0013]

Operation: The driver of the vehicle is required to adjust the soralux adjustment mechanism (2
0) to operate the upper back (10) or the lower back (1
By tilting and displacing 2), it is possible to appropriately adjust to the optimum sorax support posture, and a comfortable sitting feeling can be obtained even when sitting for a long time.

That is, when the rotating link (31) is rotated in the operation direction by human power or the like, the upper connecting link (32)
Alternatively, the upper supporting member (21) or the lower supporting member (22) is pushed through the lower connecting link (33) to tilt forward.

Therefore, the driver can adjust and hold the sorax support posture in which the driver's back is rounded and the buttocks are slightly shifted forward, and moreover, the driver can adjust the posture to the optimum one.

[0016]

Embodiments of the present invention will be described below with reference to FIGS. As shown in FIG. 2, this seat device includes a cushion body of a seat back, an upper back portion 10 that is an upper portion of a back surface of a seated driver, a back intermediate portion 11 that is an intermediate portion of a back surface of the driver, and a driver. The lower part of the back side of the back part is divided into the lower part 12 of the back, and the back middle part 11 is the support plate 1.
The seat frame is fixed to the back frame 13 of the seat back through the back frame 13, and the back frame 13 is provided with a saw rack adjusting mechanism 20 for displacing the back upper part 10 and the back lower part 12.

As shown in FIG. 1, the soralux adjusting mechanism 20 has an upper end supporting member 21 whose lower end is attached to an upper part of the back frame 13 and tiltably supports the upper back part 10.
And a lower support member 22 whose upper end is attached to the lower portion of the back frame 13 and tiltably supports the lower back portion 12
And a sector gear 31 that is swingably attached to the center of the side portion of the back frame 13 and is driven manually in this case.
(Rotating link) and an upper connecting link 32 extending from the lower end of the upper supporting member 21 and having a tip pivotally attached to the sector gear 31.
A lower connecting link 33 extending from the upper end of the lower support member 22 and having a tip pivotally attached to the sector gear 31, a small gear 34 meshing with the sector gear 31, and a small gear for driving the sector gear 31 via the small gear 34. The operation knob 35 is connected to the gear 34.

The upper support member 21 has a long hole 36 formed at a lower end of a side portion (a base end of the upper connecting link 32) engaged with a pin-shaped body protruding from the back frame 13.
The back frame 13 is swingably and slidably mounted.

The lower support member 22 is also swingable by engaging a long hole 37 formed at the lower end of the side portion (base end of the lower connecting link 33) with a pin-shaped member protruding from the back frame 13. It is slidably attached to the back frame 13.

The positions of the long holes 36 and the pin-shaped members, the mounting position of the tip of the upper connecting link 32, and the like are in the operation direction of the sector gear 31 (in this case, the counterclockwise direction in the figure).
The upper support member 21 is obliquely pushed through the upper connecting link 32 as it is rotated to, so that the upper back member 10 together with the upper support member 21 is tilted to the front position forming the saw lux support posture.

The positions of the long holes 37 and the pin-shaped members, the mounting positions of the tips of the lower connecting links 33, and the like are also in the operating direction of the sector gear 31 (in this case, the counterclockwise direction in the figure).
The lower support member 22 is obliquely pushed via the lower connecting link 32 as the rotation of the lower support member 22 is tilted, and the lower back member 12 together with the lower support member 22 is tilted to the front position forming the saw rack support posture.

The pinion gear 34 and the operation knob 35 are rotatably attached to the back frame 13 by a support structure (not shown).

Next, the operation will be described. With the seat device described above, the driver of the vehicle operates the saw rack adjusting mechanism 20 to tilt and displace the upper portion 10 or the lower portion 12 of the seat back to adjust the seat rack to an optimal posture, and to sit for a long time. You can also get a comfortable seating feeling.

That is, when the operation knob 35 is operated to rotate the sector gear 31 in the operation direction (counterclockwise),
As shown in FIG. 3, the upper supporting member (21) or the lower supporting member (22) is pushed through the upper connecting link (32) or the lower connecting link (33) and tilts forward.

Therefore, it is possible for the driver to adjust and maintain the sorax support posture in which the driver's back is rounded and the hips are slightly shifted forward, and moreover, the driver is in an optimum soralux support posture.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, a brake unit may be provided to ensure that the posture is maintained after adjustment. In this case, as the brake unit, for example,
A known locking coil type component used for a reclining device or the like has the operation knob 35 and the small gear 34.
It may be arranged between the and.

The rotary link may be configured to be rotated by a drive source such as a motor. In this case, if the speed reducing mechanism is configured on the motor side, the rotary link does not need to be the sector gear as described above, and It may be directly connected to the output shaft of.

Further, if the tip end of the upper connecting link or the lower connecting link is slidably and swingably connected to the rotary link by the engagement of the long hole and the pin, the upper supporting member or the lower supporting member is simply connected to the back frame. It may be configured so as to be swingable.

[0029]

According to the seat device of the present invention, the driver of the vehicle operates the saw racks adjusting mechanism to tilt and displace the upper or lower portion of the seat back to adjust to an optimum saw racks support posture for a long time. You can get a comfortable sitting feeling even when you sit down.

[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 a side view showing an operating state of the seat device according to the embodiment of the present invention.

FIG. 4 is a diagram for explaining a sorax support posture.

FIG. 5 is a diagram for explaining a sorax support posture.

FIG. 6 is a diagram for explaining the state of the spine of the human body in the upright posture.

FIG. 7 is a diagram for explaining a support posture in a conventional seat device.

FIG. 8 is a diagram for explaining a support posture in a conventional seat device.

[Explanation of symbols]

 10 ... Back upper part 11 ... Back middle part 12 ... Back lower part 13 ... Back frame 20 ... Solux adjustment mechanism 21 ... Upper supporting member 22 ... Lower supporting member 31 ... Rotating link (sector gear) 32 ... Upper connecting link 33 ... Lower connecting link

Claims (1)

[Claims] 1. A seat device capable of adjusting to a sorax support posture for giving a comfortable seating feeling to a driver of a vehicle, wherein a cushion body of a seat back is provided with an upper back part against which an upper rear part of the driver hits. The back middle part where the middle part of the back of the driver hits, and the back bottom where the lower part of the back of the driver hits, and the middle part of the back is fixed to the back frame of the seat back, while the back upper part is fixed to the back frame. Or a sorax adjusting mechanism for tilting and displacing a lower back portion, wherein the soralux adjusting mechanism is tiltably attached to an upper portion of the back frame and tiltably supports the upper back portion; and A lower support member that is tiltably attached to a lower portion of the back frame and that tiltably supports the lower back portion; and the back frame. A rotary link that is swingably mounted in the center of the side of the back and is driven by a drive source such as human power; and the back upper part together with the upper support member forms a saw rack support posture as the rotary link rotates in the operating direction. An upper connecting link extending from a lower end of the upper supporting member and having a tip connected to the rotating link so as to be tilted to a front position; and a lower back member together with the lower supporting member as the rotating link rotates in an operating direction. A seat device comprising: a lower connecting link extending from an upper end of the lower supporting member and having a front end connected to the rotating link so as to tilt to a front position forming a Lux support posture.