JPH0678840A - Seat device - Google Patents

Abstract

PURPOSE:To provide the seat device on which a driver is scarcely fatigued and can obtain a comfortable seating sense even in the case the driver keeps a seat for many hours for a driving operation. CONSTITUTION:A cushion body of a seat back is divided into a back upper part 10 in contact with the upper part of a driver's back, a back middle part 11 in contact with the middle part of the driver's back, and a back lower part 12 in contact with the lower part of the driver's back, and in a back frame 13, a thorax adjusting mechanism 20 is provided.

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 divided into a seat back back frame (1
3) is provided with a soralux adjusting mechanism (20) for tiltingly displaceing the back upper part (10) or the back lower part (12) while moving the back middle part (11) back and forth. The mechanism (20) has an upper end pivotally attached to an upper portion of the back frame (13) to tiltably support the upper back portion (10) (2).
1), a lower support member (22) having a lower end pivotally attached to a lower portion of the back frame (13) to tiltably support the lower back portion (12), the upper support member (21) and the lower support. An intermediate portion support member (2) arranged between the member (22) and supporting the back surface of the back intermediate portion (11).
3), a rotary link (31) swingably attached to the side surface of the intermediate support member (23) and driven by a drive source such as human power, and rotation of the rotary link (31) in the operating direction. As the upper support member (21) is pushed downward, the back upper part (10) together with the upper support member (21) is tilted to a forward position forming a saw-lux support posture. The upper connecting link (32) connecting the lower end of the upper supporting member (21) and the upper end of the lower supporting member (22) are pushed downward as the rotating link (31) rotates in the operating direction to lower the lower part. Above the rotary link (31) and the lower support member (22) so that the lower back part (12) together with the support member (22) tilts to a forward position forming a sorax support posture. Lower connecting link (3 connecting the door
3) 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)
Is pushed upward and the lower connecting link (33) is pushed downward, the upper portion supporting member (21) and the lower portion supporting member (22) are tilted forward while the intermediate portion supporting member (23) is moved backward, Support member (21), intermediate part support member (2
3), the entire lower support member (22) is displaced so as to bend inward.

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 surface of the seat is divided into a lower back part 12 to hit, and a back frame 13 of the seat back is provided with a solux adjusting mechanism 20 for displacing the upper back part 10, the intermediate back part 11 and the lower back part 12.

As shown in FIG. 1, the soralux adjusting mechanism 20 has an upper support member 21 whose upper end is pivotally attached to an upper portion of the back frame 13 to tiltably support the upper back portion 10.
And a lower support member 22 whose lower end is pivotally attached to the lower portion of the back frame 13 to tiltably support the lower back portion 12,
An intermediate portion support member 23 arranged between the upper support member 21 and the lower support member 22 to support the back surface of the back intermediate portion 11.
And a spur gear 31 (rotary link) that is swingably attached to the side surface of the intermediate portion support member 23 and is driven by human power in this case, and an upper connection link that connects the spur gear 31 and the lower end of the upper support member 21. 32, a spur gear 31, a lower connecting link 33 that connects the upper end of the lower support member 22, a small gear 34 that meshes with the spur gear 31, and a small gear for driving the spur gear 31 via the small gear 34. And an operation knob 35 connected to 34.

The upper connecting link 32 has its upper end and lower end pivotally attached to the upper supporting member 21 and the spur gear 31, respectively, and an elongated hole 36 is formed in the middle thereof. Is engaged with a pin-shaped body protruding from the side surface of the intermediate portion support member 23.

The elongated hole 36 and the pin-shaped member guide the upper connecting link 32 to ensure the moving direction thereof. The arrangement position of the elongated hole 36 and the pin-shaped member and the upper connecting link. The mounting positions of both ends of 32 are such that as the spur gear 31 rotates in the operating direction (counterclockwise in this case), the upper connecting link 32 pushes the lower end of the upper support member 21 diagonally upward to the right in FIG. The back upper part 10 together with the support member 21 is set so as to tilt to a front position forming a sorax support posture.

An upper end and a lower end of the lower connecting link 33 are pivotally attached to the spur gear 31 and the lower supporting member 22, respectively, and an elongated hole 37 is formed in the middle thereof. Also, another pin-shaped body protruding from the side surface of the intermediate portion support member 23 is engaged.

The elongated hole 37 and the pin-like body are also for guiding the lower connecting link 33 to ensure the moving direction thereof. The arrangement position of the elongated hole 37 and the pin-like body and the lower connecting link. The mounting positions of both ends of 33 are such that as the spur gear 31 rotates in the operating direction (counterclockwise in this case), the lower connecting link 32 pushes the lower end of the lower support member 22 diagonally downward to the right in FIG. The lower back part 12 together with the support member 22 is set to be tilted to a front position forming a sorax support posture.

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 spur gear 31 in the operation direction (counterclockwise direction), as shown in FIG.
, The upper connecting link 32 is pushed upward and the lower connecting link 33 is pushed downward, so that the intermediate support member 23
While being translated toward the back frame 13, the upper support member 21 and the lower support member 22 tilt forward, and the entire upper back portion 10, the intermediate back portion 11, and the lower back portion 12 are displaced so as to bend inward.

Therefore, the driver can adjust and hold the sorax support posture in which the driver's back is rounded and the hips are slightly shifted in front, and moreover, the soralux support posture is optimal for the driver.

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, the rotary link does not have to be the above-described gear as long as the speed reducing mechanism is configured on the motor side.

[0027]

According to the seat device of the present invention, the driver of the vehicle operates the saw rack adjusting mechanism to tilt and displace the upper or lower portion of the main bag to appropriately adjust the saw rack 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 support member 23 ... Middle part support member 22 ... Lower support member 31 ... Rotary link (spur gear) 32 ... Upper part Connection link 33 ... Lower connection 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. It is divided into a back middle part where the middle part of the back of the driver hits and a lower back part where the lower part of the back of the driver hits, and the back frame of the seat back moves the back middle part back and forth while moving the back upper part or A sorax adjusting mechanism for tilting and displacing a lower back portion, wherein the soralux adjusting mechanism has an upper support member whose upper end is pivotally attached to an upper portion of a back frame of a seat back and tiltably supports the upper back portion; A lower support member having a lower end pivotally attached to a lower portion of the back frame to tiltably support the lower back portion, the upper support member and the lower support member. An intermediate portion support member which is disposed between the intermediate portion support member and a back surface of the back intermediate portion, and a rotary link which is swingably attached to a side surface of the intermediate portion support member and is driven by a drive source such as human power. As the rotary link rotates in the operating direction, the lower end of the upper support member is pushed upward so that the upper back member and the upper back member tilt together with the upper support member to a forward position forming a saw-lux support posture. An upper connecting link connecting the lower end of the supporting member, and a lower part of the back together with the lower supporting member form a saw rack support posture by pushing the upper end of the lower supporting member downward as the rotary link rotates in the operating direction. A lower connecting link connecting the rotating link and the upper end of the lower supporting member so as to tilt to a position. The seating arrangement to be.