JPH0672205A - Seat device - Google Patents

Abstract

PURPOSE:To provide a seat device so as to provide tireless and comfortable sitting feeling without loading a driver's vertebra, even in the case when a driver conducts a driving operation for a long time while sitting. CONSTITUTION:An output wheel is operated by means of a driving motor 42 for interlocking an upper link member 24 and a lower link member 25 through a coupling link member 41, and at an upper back regulation part of a thorax regulation mechanism, an upper back part is displaced so as to go forward relatively with a back position by tilting an upper back support member 32, and on the other hand at a hip regulation part, a lower back part goes forward by tilting a hip support member 35 for supporting a driver's hip from backward.

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 to give a comfortable seating feeling to a driver of an automobile. 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 part (40). The upper back adjusting part (31) pivotally attaches the upper link member (24) to the back frame (20). Then, the upper back portion (11) is displaced such that the driver's back is moved forward relative to the back position, and the upper back portion (11) is tilted to a position for placing the upper back portion (11) in a saw-lux support posture. An upper back support member (32) is supported by a link member (24), and the hip adjustment portion (34) is provided with the back frame (2).
0), the lower link member (25) is pivotally attached to the lower link member (25) so as to be able to tilt forward so as to hold the driver's hips from the rear when taking a sorax support posture. The butt support member (35) is supported, and the driving unit (40) is provided with the upper link member (2).
4) and the lower link member (25) are connected to each other to connect the upper back support member (32) and the hip support member (35) together, and the upper link member (24). And a seating device (1) comprising an output member (45) for driving at least one of the lower link members (25).

[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 output member (45) is activated by power, the upper link member (24) and the lower link member (2)
At least one of 5) is driven to swing the upper link member (24) in the upper back adjusting part (31) provided inside the upper back part (11) with which the upper part of the back of the driver comes into contact. The upper back support member (32) is tilted, the cushion body (10a) is displaced so that the upper back portion (11) is relatively forward from the back position, and the upper back portion (11) of the cushion body (10a) is displaced. To the 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 lower link member (25) swings and the hip support member (35) tilts. Then, the lower back portion (13) of the cushion body (10a) corresponding to the hips is moved forward to bring the driver's hips into a sorax support posture that holds the hips from the rear.

The upper back support member (32) and the buttocks support member (35) are constrained by the output member (45) so that the upper link member (24) and the lower link member (25) are not swingable. The seat back (10) is supported so that it cannot be tilted, and the seat back (10) maintains the 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.

A pivot 22 is installed above each side portion 21, and an upper link member 24 constituting a saw rack adjusting mechanism 30 is swingably supported by the pivot 22. Similarly, at the bottom of each side portion 21, a sorax adjustment mechanism 3
A lower link member 25 forming 0 is pivotably supported. The base end portion of the upper link member 24 is located near the boundary between the upper back portion 11 and the center back portion 12, and the base end portion of one of the lower link members 25 is the center back portion 12 and the lower back portion 13. It is located near the border of.

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 portion 31 is the upper link member 2
4 and an upper back support member 32, the upper back support member 32 is formed in an inverted U-shape, and the upper back support member 3 is provided.
The lower end of 2 is fixed to the upper link member 24.

As shown in FIGS. 2 and 3, the upper back support member 32 is provided such that the upper end edge of the upper back support member 32 can be tilted forward about the pivot 22, and the upper back edge of the cushion body 10a is also tilted. The back portion 11 is displaced so as to bulge forward and is placed in a sorax support posture. In this case, the range of the tilt angle of the upper back support member 32 is preferably set so as to form the sorax support posture shown in FIGS. 4 and 5.

The butt adjuster 34 includes the lower link member 25.
And a butt support member 35, and the butt support member 35 is provided at the tip of each lower link member 25. As shown in FIGS. 2 and 3, the hip support member 35
Is provided so that the lower end edge thereof can be tilted forward around the base end of the lower link member 25, and with this tilting, the lower back portion 13 of the cushion body 10a is displaced so as to bulge 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.

Further, 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, for example, the upper link member 24
Also, a limit switch capable of contacting the lower link member 25 can be used.

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. With the movement of the lower back portion 13 due to the adjusting operation of the buttocks adjusting portion 34, the center back portion 12
Although it is slightly displaced, the position adjusting section dedicated to the center back section 12 is not provided.

The driving portion 40 connects the tip end portion of the upper link member 24 and the tip end portion of the lower link member 25, and the connecting link member 41 that enables the upper back support member 32 and the hip support member 35 to interlock. Drive motor 42 and reduction mechanism 4
3 and an output wheel 45 which is an output member rotated by the drive motor 42. One end of the relay link 46 is connected to the peripheral portion of the output wheel 45, and the other end of the relay link 46 is connected to the tip end portion of the lower link member 25.

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. 4 is displaced to adjust to the saw rack support posture, and the drive motor 42 is stopped, so that the reduction mechanism 43, the output wheel 45, and the relay link 46 cannot be displaced. The tilting of each of the support member 32 and the hip support member 35 can be suppressed and held in this state, so that a comfortable sitting feeling can be obtained even when sitting for a long time.

As shown in FIGS. 2 and 3, the drive motor 4
2 is started, the output wheel 4 is passed through the reduction mechanism 43.
When 5 rotates and the output wheel 45 rotates, the lower link member 25 swings via the relay link 46. Thereby, the upper link member 24 is connected via the connecting link member 41.
When the upper link member 24 swings and the upper link member 24 swings, in the upper back adjusting portion 31 of the saw rack adjusting mechanism 30, the upper edge of the upper back supporting member 32 tilts forward around the pivot 22, and the upper back portion moves. 11 is pushed forward by the upper back support member 32 and is 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 lower link member 25 swings, the lower end edge of the buttocks supporting member 35 also tilts forward in the buttocks adjusting portion 34 of the saw rack adjusting mechanism 30 as well, and the cushion body corresponding to the buttocks of the driver. The lower back portion 13 of 10a is moved forward to bring the driver's hips into a sorax support posture for holding from behind.

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

Therefore, the respective sorax sensors 51, 52
If an appropriate display is given to the driver based on the signal from
The driver or the like can objectively judge that he / she is in the sollux 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 hip support member 35, since the drive motor 42 is stopped similarly, the reduction mechanism 43, the output wheel 45 and the relay link are also provided. 46 is non-displaceable and thereby supported so that it cannot tilt,
The seat back 10 maintains its 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-described embodiment, the above-mentioned saw-lux sensors 51 and 52 are provided in order to ensure the adjustment to the posture of the saw-lux support. It is also possible to form a scale or an indicator line indicating a preferable angle range of the upper back portion 11 and the lower back portion 13 at appropriate places. Although the output wheel 45 is rotated by the drive motor 42, it may be rotated manually.

[0035]

According to the seat apparatus of the present invention, by operating the drive unit, the upper link member and the lower link member are interlocked with each other via the connecting link member, and the upper back adjusting unit of the saw racks adjusting mechanism. Then, while tilting the upper back support member to displace the upper back part relatively forward from the back position, in the buttocks adjusting part, tilt the buttocks support member and move the lower back part forward to drive. Since the person's hips are held from the rear, the driver's spine can be easily adjusted even when the driver of the vehicle sits for a long time without causing strain on the driver's spine. Can comfortably sit and drive the car in a Soluxe support position.

[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 a side view showing a seat device according to an 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 Adjustment part 32 ... Upper back support member 34 ... Butt adjustment part 35 ... Butt support member 40 ... Driving part 41 ... Connection link member 45 ... Output wheel (output 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 adjusting unit pivotally attaches an upper link member to the back frame so as to swing, and the upper back unit displaces the driver's back relative to the back position. An upper back support member is supported by the upper link member so that the upper back portion can be tilted to a position where the upper back portion is in a sorax support posture, and the hip adjustment portion swings the lower link member on the back frame. When pivotally pivoted as much as possible, when the soles support posture is taken, the hip link support member is pivotally attached to the lower link member so as to be able to tilt forward so as to hold the hip of the driver from the rear, A connecting link member that connects the upper link member and the lower link member to interlock the upper back support member and the hip support member, the upper link member, and the lower lid. Seat apparatus characterized by comprising an output member for driving at least one of the click member.