JPH0672210A - Seat device - Google Patents

Abstract

PURPOSE:To provide a seat device which offers a driver a comfortable feeling of sitting, on which he can tirelessly sit without being hard on his backbone, even when he has to sit for a long time for driving. CONSTITUTION:When a cam member 42 for drive is turned, a member 43 for power transmission is moved forward against the energizing force, and an upper link member 24 and a lower link member 25 are pulled forward. At this time, in an upper back control part of a thorax adjusting mechanism, an upper back support member 32 is tilted forward to displace an upper back part as being relatively protruded from the back surface position, and on the other hand, in a hips control part, a hips support member 35 injected forward to advance a lower back part and hold the hips of a driver from behind.

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 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 scale on the vertical and horizontal axes is 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 (1) that can be adjusted to a sorax support posture that does not impose a burden on the spine of a motor vehicle driver. The cushion body (10a) of the seat back (10) includes an upper back part (11) with which the upper part of the back of the driver comes into contact, a lower back part (13) corresponding to the back of the driver's hip, and the upper part. A cushion body (1) is provided in a back frame (20) built in the cushion body (10a), which includes a center back portion (12) between the back portion (11) and the lower back portion (13).
0a) is provided with a soralux adjusting mechanism (30), and the soralux adjusting mechanism (30) includes an upper back adjusting part (31) provided on the upper back part (11) and the lower back part (13). And a drive unit (40), and the upper back adjustment unit (31) is attached to the back frame (20) by the upper back unit (1).
1) is movably supported in the front-rear direction so that the driver's back is displaced so as to move forward relative to the back position, and the upper back portion (11) is tilted to a position in which it is in a sorax support posture. An upper back support member (32) is provided, and the hip adjustment portion (34) is provided with the back frame (2).
0) is provided with a butt support member (35) which is displaceably supported in the front-rear direction so as to be capable of forward tilting so as to hold the driver's butt from the rear when the soles support posture is taken. 40) is connected to the upper back support member (32) and is connected to an upper link member (24) extending downward and the hip support member (35),
The lower link member (25) extending upward, the lower end portion of the upper link member (24) and the upper end portion of the lower link member (25) are connected to each other, and the back frame (20) is arranged in the front-rear direction. Movably supported by
The power transmission member (43) biased rearward is rotated to move the power transmission member () forward against the biasing force to move the upper link member (24). The upper cam support member (32) is tilted forward via the lower back link member (25) and the hip support member (35) is displaced forward via the lower link member (25).
2) A seat device (1) characterized by comprising:

[0013]

Operation: The driver of the vehicle is
0) is operated to displace the seat back (10) to adjust the seat back support posture to the upper back support member (3
2) and the buttocks support member (35) are held in the respective states, and a comfortable sitting feeling can be obtained even when sitting for a long time.

When the driving cam member (42) is activated,
The power transmission member (43) is driven forward against the biasing force, and the upper back portion (1) with which the upper part of the back of the driver comes into contact.
In the upper back adjusting portion (31) provided inside 1), the upper back support member (32) is tilted, and the upper back portion (11) is moved forward relative to the back position.
a) is displaced, and the upper back portion (11) of the cushion body (10a) is placed in a sorax support posture.

Also in the hip adjusting portion (34) provided inside the lower back portion (13) corresponding to the back of the driver's hip, the hip support member (35) projects forward, and the cushion body (10a) corresponding to the hip. ) The lower back part (13) is moved forward to bring the driver's hips to the sorax support posture that holds the hips from the rear.

The upper back support member (32) and the buttocks support member (35) are prevented from tilting when the power transmission member (43) is immovably restrained by the driving cam member (42). It is supported and the seat back (10) retains its state unless it is operated. In this way, the cushion body (10a) holds the back and hips of the driver, and the driver can comfortably sit in the sorax support posture and drive the vehicle.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 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. It can be adjusted to the sorax support posture shown in FIGS. 4 and 5 which gives a comfortable sitting feeling to the user.

The cushion body 10a constituting the seat back 10 includes an upper back portion 11 with which the upper part of the back of the driver abuts, and a lower back portion 1 corresponding to the back of the driver's hip.
3 and a center back portion 12 between the upper back portion 11 and the lower back portion 13. Cushion body 10a
Is integrally foam-molded from urethane foam or the like, and in this embodiment, the center back portion 12 and the lower back portion 13 are smoothly continuous.

The back frame 20 built in the cushion body 10a has side portions 21 and 21 on both sides. The lower end of each side portion 21 is fixed to the rear end of the cushion frame 50 via the base bracket 28 that constitutes the reclining device.

Upper side members 32a are swingably mounted on the upper portions of the side portions 21, respectively, upper rod members 32b are provided on the upper side members 32a, and upper link members 32b are connected to upper link members. Two
The upper end of 4 is rotatably connected. On the other hand, at the lower end of each side portion 21, there is a long hole 2 having a longitudinal direction in the front-back direction.
1a is provided respectively, both ends of a lower rod member 35a are fitted in each elongated hole 21a so as to be movable in the front-rear direction, and a lower end portion of a lower link member 25 is rotatably connected to the lower rod member 35a. Has been done. Upper side member 3
2a, upper rod member 32b, and lower rod member 3
Reference numeral 5a constitutes a sorax adjusting mechanism 30. The base end portion of the upper side member 32 a is located at the boundary between the upper back portion 11 and the center back portion 12, and the lower rod member 35 a is located below the lower back portion 13.

The soralux adjusting mechanism 30 is composed of an upper back adjusting portion 31 provided inside the upper back portion 11, a hip adjusting portion 34 provided inside the lower back portion 13, and a driving portion 40.

The upper back adjusting section 31 includes an upper back support member 32.
The upper back support member 32 includes upper side members 32a and 32a and an upper rod member 32b.

As shown in FIGS. 2 and 3, the upper side member 32a of the upper back support member 32 is tilted so that the upper back portion 11 of the cushion body 10a is bulged forward, and the upper back member 32a is brought into the sorax support posture. It is a thing.
In this case, the range of the tilt angle of the upper back support member 32 is
It is preferably set so as to form the sorax support posture shown in FIGS. 4 and 5.

The butt adjuster 34 includes a butt support member 35, and the upper back support member 35 is a lower rod member 35a.
And the support panel 3 supported by the lower rod member 35a
5b and.

As shown in FIGS. 2 and 3, the support panel 35b of the hip support member 35 is displaced so that the lower back portion 13 of the cushion body 10a bulges forward,
Thorax support posture. In this case, it is preferable that the range of the tilting angle of the hip support member 35 is set so as to form the sorax support posture shown in FIGS. 4 and 5 similarly to the upper back support member 32.

As shown in FIGS. 2 and 3, the soralux sensors 51 and 52 are provided on the upper and lower portions of the side portion 21 of the back frame 20, respectively. The upper soralux sensor 51 is a sensor that detects that the upper back portion 11 has moved to a range forming a soralux support posture by detecting the tilted position of the upper back support member 32, and the lower soralux sensor 51. The sensor 52 is a sensor that detects that the lower back portion 13 has moved to a range forming a sorax support posture by detecting the tilted position of the hip support member 35.

Specifically, it is possible to use a limit switch capable of contacting the upper side member 32a and the lower rod member 35a, respectively.

Between the upper back portion 11 and the lower back portion 13, there is a center back portion 12 with which the substantially central portion of the driver's back abuts. The center back part 12 has an S
Spring members 29, 29 are stretched. Although the center back portion 12 is slightly displaced along with the movement of the lower back portion 13 due to the adjusting operation of the hip adjusting portion 34, the center back portion 12
There is no dedicated position adjustment unit.

The drive unit 40 is the upper link member 24.
The lower link member 25, and the power transmission member 43 in which the lower end portion of the upper link member 24 and the upper end portion of the lower link member 25 are rotatably connected. The power transmission member 43 is provided laterally, and both ends of the power transmission member 43 are fitted in guide holes 21b formed in each side portion 21 so as to be movable in the front-rear direction.

Behind the power transmission member 43, a drive shaft 41 is laterally provided along the power transmission member 43, and both ends of the drive shaft 41 are provided at each side portion 2.
1 is rotatably supported.

Power transmission member 43 and drive shaft 4
An elastic member 44 is bridged over the member 1, and the elastic member 44 urges the power transmission member 43 rearward.

The elastic member 44 is attached to the driving shaft 41.
A driving cam member 42 is fixedly provided to push the power transmission member 43 forward against the biasing force. An adjusting knob 45 is fixedly mounted on one end of the drive shaft 41.

Next, the operation will be described. Car drivers
The seat back 10 is operated by operating the saw racks adjusting mechanism 30.
The cushion body 10a of FIG. 2 is displaced to adjust to the sorax support posture, and the drive shaft 41 is stopped rotating. Therefore, the drive member 41 is constrained by the cam member 42, and the power transmission member 43 cannot move. The link member 24 and the lower link member 25 are non-rotatable, which suppresses the movement of the upper back support member 32 and the hip support member 35 in the front-rear direction and holds them in that state, and is comfortable even when sitting for a long time. You can get a comfortable sitting feeling.

As shown in FIG. 2 and FIG. 3, when the driving shaft 41 is rotated by the adjusting knob 43, the cam member 42 is rotated, and when the cam member 42 is rotated, the elastic member 44 is attached. The power transmission member 43 moves forward against the power.

When the power transmission member 43 moves forward,
The lower end of the upper link member 24 and the lower link member 25
Is pulled forward, the upper rod member 32b is pulled in the upper back adjusting portion 31 of the sorlux adjusting mechanism 30, the upper side member 32a is tilted forward, and the upper back portion 11 is moved by the upper back supporting member 32. It is pushed forward and displaced so as to bulge relatively ahead of the back position.
As a result, the upper back portion 11 of the cushion body 10a with which the upper part of the back of the driver comes into contact is in the sorax support posture.

When the upper end of the lower link member 25 is pulled forward, the lower rod member 35a is pulled, and also in the hip adjusting portion 34 of the saw rack adjusting mechanism 30, similarly, the support panel 35b projects forward, so that the driver The lower back portion 13 of the cushion body 10a corresponding to the hips of the driver is moved forward to bring the driver's hips into a sorax support posture that holds the hips from behind.

As described above, when the upper back portion 11 is moved to the position where the saw back support posture is formed by the saw back adjusting mechanism 30, the upper back support member 32 swings within the detection range of the saw back sensor 51. And the signal is output from the solar sensor. Similarly, when the lower back portion 13 moves, the butt support member 35 is swinging within the detection range of the soralux sensor 52, and a signal is output from the soralux sensor.

Therefore, if the driver or the like makes an appropriate display based on the signals from the respective soralux sensors, the driver or the like can objectively judge that the driver is in the soralux 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.

After the adjustment, as shown in FIG. 2, in the upper back support member 32 and the buttocks support member 35, since the driving shaft 41 is not rotating, the cam member 4 is stopped.
2 holds the power transmission member 43 immovably, and thereby the upper link member 24 and the lower link member 25 are supported so as not to move, so that the seat back 10 holds the state unless it is operated. In this way, the cushion body 10a holds the driver's back and hips, and the driver can comfortably sit in the sorax support posture and drive the vehicle.

In the above-mentioned embodiment, the above-mentioned saw-lux sensor is provided in order to ensure the adjustment to the posture of the saw-lux support. However, instead of or together with this structure, the upper sensor is placed at a proper position on the surface of the apparatus. A scale, an indicator line, or the like indicating the preferable angle range of the back portion 11 or the lower back portion 13 may be formed. Also, the drive shaft 4
Although 1 is manually rotated, a power unit may be provided for rotation.

Further, although the one in which the driving shaft 41 is provided as the output member is shown, the cam member 42 may be rotationally driven by a geared cable, for example.

[0042]

According to the seat apparatus of the present invention, by rotating the driving cam member, the power transmission member is moved forward against the biasing force, and the upper link member and the lower link member are moved. In the upper back adjusting part of the sorlux adjusting mechanism, the upper back supporting member is tilted forward to displace the upper back part so that it comes out relatively forward from the back position, while the hip adjusting part also moves forward. Since the hip support member is projected forward and the lower back portion is moved forward to hold the driver's hip from the rear, even if the driver of the vehicle sits for a long time, the driver's spine is not strained and fatigue is reduced. It is possible to easily adjust to a sorax support posture that does not accumulate, and the driver can comfortably sit and drive the vehicle in the soralux support posture.

[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 an operation explanatory view showing the seat device according to the embodiment of the present invention.

FIG. 3 is an operation explanatory view showing 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]

 DESCRIPTION OF SYMBOLS 1 ... Seat device 10 ... Seat back 10a ... Cushion body 11 ... Upper back part 12 ... Center back part 13 ... Lower back part 20 ... Back frame 24 ... Upper link member 25 ... Lower link member 30 ... Sorlux adjustment mechanism 31 ... Upper back Adjusting part 32 ... Upper back supporting member 34 ... Butt adjusting part 35 ... Butt supporting member 40 ... Driving part 41 ... Driving shaft 42 ... Driving cam member 43 ... Drive transmitting member

Claims (1)

[Claims] 1. A seat device capable of adjusting to a sorax support posture that does not give a burden to the spine of a driver of an automobile, wherein a cushion body of the seat back has an upper back portion with which an upper part of the back of the driver abuts. A sora rack for displacing the cushion body in a back frame built in the cushion body, the lower back portion corresponding to the back of the driver's hip and a center back portion between the upper back portion and the lower back portion. An adjusting mechanism is provided, and the soralux adjusting mechanism includes an upper back adjusting portion provided in the upper back portion, a hip adjusting portion provided in the lower back portion,
The upper back adjustment unit displaces the upper back unit relative to the back frame so that the upper back unit moves the driver's back forward relative to the back position, and brings the upper back unit into a sorax support posture. An upper back support member that is tiltably supported in the front-rear direction so as to be tilted to a position is provided, and the hip adjustment unit holds the hips of the driver from the rear when the sole frame is in the sorax support posture. The lower back portion is provided with a hip support member that is displaceably supported in the front-rear direction so that the lower back portion can be tilted forward, and the drive portion is connected to the upper back support member, and an upper link member that extends downwards, The lower link member connected to the hip support member and extended upward, the lower end of the upper link member and the upper end of the lower link member are connected to each other. In addition, the power transmission member is movably supported by the back frame in the front-rear direction and is biased rearward, and is rotated to move the power transmission member forward against the biasing force. The upper back support member is tilted forward via the upper link member, and the buttocks support member and the driving cam member for displacing the hip support member forward through the lower link member are provided. Characteristic seat device.