JPH0672220A - Seat device - Google Patents

Abstract

PURPOSE:To provide such a sitting posture that makes a driver feel tireless and imposes less burden on the vertebra in the case where the driver drives for a long time in a setting posture. CONSTITUTION:In a seat device 10 adjustable to a thorax support posture which imposes less burden on the vertebra of a driver of an automobile, an upper end of an upper frame 32 for supporting an upper back part 31 is pivotally supported by a back frame 40 so as to be swung about a horizontal upper back adjustment support shaft 32a and a lower end of a lower frame 35 for supporting a lower back part 34 is pivotally supported by the back frame 40 so as to be swung about a horizontal hips adjustment support shaft 35a. And the upper back part 31 and the lower back are so constituted as to be relatively swung and displaced to a thorax support posture, when a center back part 37 is pushed to the rear, and the seat device is provided with a lock mechanism 50 which engages and disengages at least one of the upper frame 32 or the lower frame 35 so as to old its posture.

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 motor 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. 7, the back of the person M when standing upright has a so-called S-shape with the upper back of the waist inward. 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 and operates the steering wheel, 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, causing a so-called slippage phenomenon in which you push your buttocks forward, and the back of your buttocks separates from the seat back, and your body hits the lumber 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 would take naturally and the spine would not be overloaded, as shown in FIG. 5 which shows 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. It was concluded that the posture shown in FIG. 6 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 in an angle range 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 Sorlux support posture becomes more upright at the upper part and more prominent at the lower part. Becomes

Based on this conclusion, the gist of the present invention for achieving the above-mentioned object is a seat device (10) that can be adjusted to a sorax support posture without burdening the spine of the driver of the vehicle. Seat back (2
The back contact part (30) of the cushion body of (0) includes an upper back part (31) with which the upper part of the back of the driver contacts, a lower back part (34) corresponding to the back of the driver's hips, and an upper back part. (31) and a center back part (37) between the lower back part (34) and the upper back part (3).
The lower frame that holds the lower back portion (34) by pivotally supporting the upper end portion of the upper frame (32) holding 1) on the back frame (40) so as to be swingable around a horizontal upper back adjusting support shaft (32a). A back frame (40) that allows the lower end of (35) to swing around a horizontal buttocks adjustment support shaft (35a).
And a lower end portion of the upper frame (32) is pivotally supported by an upper tension spring member (33).
7) is pivotally connected to the upper end of a center frame (38) holding it, and the upper end of the lower frame (35) is connected to the center frame (3) via a lower tension spring member (36).
8) pivotally connected to the lower end of the center back part (37)
When the back is pushed backward, the upper back portion (31) and the lower back portion (34) are relatively swung so as to be displaceable to the saw rack support posture.
The seat device (10) is characterized in that a lock mechanism (50) for engaging and disengaging the upper frame (32) and the lower frame (35) of the lower back portion (34) is provided.

[0013]

The seat device (10) can be adjusted to a sorax support posture that does not burden the spine of the driver of the automobile, and the driver can drive with minimal fatigue even for a long time. Normally, the lock mechanism (50) engages with and restrains the upper frame (32) of the upper back portion (31) and the lower frame (35) of the lower back portion (34) to restrain the seat back (20). Hold on to the state.

When operating for a long time, the lock mechanism (50) is temporarily unlocked. When unlocked, the upper tension spring member (33) and the lower tension spring member (3)
The upper frame (32), the back frame (40), and the lower frame (35) tend to be aligned with each other due to the tension between the upper back part (31) and the lower back part (3).
4) and the center back part (37) tend to be flat.

When the driver pushes the center back portion (37) to move it backwards against the tension between the upper tension spring member (33) and the lower tension spring member (36), the upper back portion (31) is moved. The upper frame (32) for holding the upper end of the upper frame (32) swings around the horizontal upper back adjustment support shaft (32a),
Lower frame (35) holding the lower back part (34)
Oscillates around the horizontal bottom adjustment support shaft 35a at the lower end, and the upper back part (31) and the lower back part (34) oscillate relative to each other and are displaced to the soralux support posture.

Therefore, when the upper frame (32) and the lower frame (35) are constrained by the lock mechanism 50, the back contact portion (30) of the cushion body of the seat back (20) is held in the saw rack support posture. In this sorax support posture, the driver can take a posture in which the spine is not the most burdened, and the driver does not feel tired even after driving for a considerably long time, resulting in comfortable driving.

When it is desired not to take the soralux support posture in a short time operation, once the lock mechanism (50) is unlocked, the tension between the upper tension spring member (33) and the lower tension spring member (36) causes the tension. Upper frame (3
2) and back frame (40) and lower frame (35)
And the upper back part (31), the lower back part (34), and the center back part (37) tend to be flat, so that when the user takes a desired posture, the locking mechanism 50 causes the upper frame ( By restraining the lower frame (32) and the lower frame (35), the back contact portion (30) of the cushion body of the seat back (20) is held in that 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 4 show an embodiment of the present invention. The seat device 10 is adjustable to a sorax support posture that does not burden the spine of the driver of the vehicle, and the seat back 10 is a back contact portion 30 of the cushion body of the seat back 20.
Is the upper back portion 31 with which the upper part of the driver's back comes into contact.
And the lower back portion 34 corresponding to the back of the driver's hips,
The center back portion 37 is formed between the upper back portion 31 and the lower back portion 34. As shown in FIG. 3, a bellows 39 for blindfolding may be stretched between the center back portion 37 and the lower back portion 34.

The upper end of the upper frame 32 holding the upper back portion 31 is pivotally supported on the tip of an upper support column 41 which is erected on the upper end of the back frame 40 so as to be swingable around a horizontal upper back adjusting support shaft 32a. Has been done. Lower back part 34
The lower end of the lower frame 35 that holds the lower frame 35 is pivotally supported by a lower support column 42 that is erected on the lower end of the back frame 40 so as to be swingable about a horizontal buttocks adjustment support shaft 35a.

The lower end of the upper frame 32 is pivotally connected to the upper end of the center frame 38 holding the center back portion 37 by the connecting shaft 33a via the upper tension spring member 33, and the upper end of the lower frame 35 is pulled downward. Spring member 3
To the lower end of the center frame 38 via the connecting shaft 36a.
It is pivotally connected by. Accordingly, when the center back portion 37 is pushed rearward, the seat back 20 is configured such that the upper back portion 31 and the lower back portion 34 relatively oscillate so that the seat back 20 can be displaced to the saw rack support posture.

As can be seen from FIGS. 1 and 2, a lock mechanism 50 for engaging and disengaging the upper frame 32 of the upper back portion 31 and the lower frame 35 of the lower back portion 34 is provided. Is composed of an upper lock portion 50a, a lower lock portion 50b, and a lock operation portion 55.

The upper lock portion 50a has an engaging / disengaging claw member 51a pivotally attached to an upper supporting column 41 of the back frame 40, and an upper back adjusting support having a tooth portion 53a with which a claw part 52a of the engaging / disengaging claw member 51a is engaged / disengaged. A sector 54a centering on the shaft 32a is fixed to the upper frame 32.

The lower lock portion 50b includes the back frame 4
The lower frame 35 has a sector 54b centered on the buttocks adjustment support shaft 35a having a tooth portion 53b for engaging and disengaging the claw portion 52b of the engaging and disengaging claw member 51b. It is fixed to.

The lock operating portion 55 is the back frame 40.
An operation shaft 57 having an operation handle 56 at its end is pivotally supported on the side column 43 of the crank link member 5 fixed to the operation shaft 57.
Connecting rods 58a and 58b extend vertically from the tip of 8.
The respective tips are connected to the ends of the engaging / disengaging claw members 51a and 51b of the upper lock portion 50a and the lower lock portion 50b.

The crank link member 58 is biased by a spring 59 in a direction in which the claw portions 52a and 52b of the engaging and disengaging claw members 51a and 51b engage with the tooth portions 53a and 53b of the sectors 54a and 54b.

The seat device 10 can be adjusted to a sorax support posture that does not burden the spine of the driver of the vehicle, and the driver can drive with minimal fatigue even for a long time. Normally, in the upper lock portion 50a and the lower lock portion 50b of the lock mechanism 50, the claw portions 52a and 52b of the engaging and disengaging claw members 51a and 51b are the sectors 54a,
The seat back 2 is engaged with the tooth portions 53a and 53b of the seat back 54b.
0 is held in the state at that time.

When operating for a long time, the operating handle 56
Is operated to unlock the lock mechanism 50 once.
When the operation shaft 57 is rotated by the operation handle 56, the connecting rods 58a and 58b are pulled by the crank link member 58, and the claw portions 52a and 52b of the engaging and disengaging claw members 51a and 51b are sectored in the upper lock portion 50a and the lower lock portion 50b. When the seat back 20 is unlocked by being disengaged from the tooth portions 53a and 53b of 54a and 54b, the upper frame 32, the back frame 40, and the lower frame 35 are tensioned by the upper tension spring member 33 and the lower tension spring member 36.
And the upper back portion 31, the lower back portion 34, and the center back portion 37 tend to be flat as shown in FIG.

When the driver pushes the center back portion 37 to move the center back portion 37 rearward against the tension of the upper tension spring member 33 and the lower tension spring member 36, the upper frame 32 holding the upper back portion 31 is held at the upper end portion. The lower frame 35, which swings around the horizontal upper back adjustment support shaft 32a and holds the lower back portion 34, swings around the horizontal bottom adjustment support shaft 35a at the lower end portion, and the upper back portion 31 and the lower back portion 34 are separated from each other. It swings relatively, and as shown in FIG.
1 is in contact with the upper back of the driver, and the lower back part 34 is displaced to the sorax support posture in which it is in contact with the buttocks of the driver.

When the operating handle 56 is released, the operating shaft 57 is returned and rotated by the urging force of the spring 59, and the connecting rods 58a and 58b pulled by the crank link member 58 are returned.
In the upper lock portion 50a and the lower lock portion 50b, the claw portions 52a and 52b of the engaging and disengaging claw members 51a and 51b are engaged with the tooth portions 53a and 53b of the sectors 54a and 54b, the seat back 20 is locked, and the upper frame 32 and the lower portion. The frame 35 is restrained.

Then, the back contact portion 30 of the cushion body of the seat back 20 is held in the sorax support posture. In this sorax support posture, the driver can take a posture in which the spine is not the most burdened, and the driver does not feel tired even after driving for a considerably long time, resulting in comfortable driving.

When the operation is for a short period of time and the user does not want to take the soralux support posture, once the lock mechanism 50 is unlocked, the tension of the upper tension spring member 33 and the lower tension spring member 36 causes the upper frame 32 and the back frame. 40 and the lower frame 35 tend to be in line with each other, and the upper back portion 31, the lower back portion 34, and the center back portion 37 tend to be flat. Therefore, when the user takes a desired posture, the locking mechanism 50 causes the upper frame 32 or If the lower frame 35 is restrained, the seat back 20
The back contact portion 30 of the cushion body is held in that state.

It should be noted that in order to know that the position is in the sorax support posture, it is preferable to confirm by providing an index or a scale on the bent portion. You may make it possible to electrically display and know by using a sensor.

[0033]

According to the seat device of the present invention, an upper back portion against which the upper part of the back of the driver abuts the back contact portion of the cushion body of the seat back, and a lower back portion corresponding to the back of the driver's hips. It is divided into an upper back part and a center back part between the lower back part, and by pushing the center back part, it is possible to adjust to the sorax support posture, so even if the driver of the car sits for a long time, fatigue Can be easily adjusted 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 explanatory diagram showing a main part of a lock mechanism of the seat device according to the embodiment of the present invention.

FIG. 3 is a side view showing a state where the cushion body of the seat apparatus according to the embodiment of the present invention is flat.

FIG. 4 is a side view showing a state in which the cushion body of the seat apparatus according to the embodiment of the present invention is adjusted to the soralux support posture.

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

FIG. 6 is an explanatory diagram showing a seated state in a sorax support posture.

FIG. 7 is an explanatory diagram showing a state of a spine of a human body in an upright posture.

FIG. 8 is an explanatory diagram showing a support posture in a conventional seat device.

FIG. 9 is an explanatory diagram showing a support posture in a conventional seat device.

[Explanation of symbols]

 10 ... Seat device 10 20 ... Seat back 30 ... Back contact part 31 ... Upper back part 32 ... Upper frame 32a ... Upper back adjustment support shaft 33 ... Upper tension spring member 34 ... Lower back part 35 ... Lower frame 35a ... Butt adjustment support shaft 36 ... Lower tension spring member 37 ... Center back part 38 ... Center frame 40 ... Back frame 50 ... Lock mechanism

Claims (1)

[Claims] 1. A seat device that can be adjusted to a sorax support posture that does not burden the spine of a driver of an automobile, wherein the back contact portion of the cushion body of the seat back is in contact with the upper part of the back of the driver. A back portion, a lower back portion corresponding to the back of the driver's hips, and a center back portion between the upper back portion and the lower back portion, and the upper end portion of the upper frame holding the upper back portion is made horizontal. The lower frame supporting the lower back is pivotally supported on the back frame so as to be swingable about the upper back adjustment support shaft, and the lower end of the lower frame is pivotally supported on the back frame so as to be swingable about the horizontal buttocks adjustment support shaft, and is pulled upward. A lower end portion of the upper frame is pivotally connected to an upper end portion of a center frame holding the center back portion via a spring member, and a lower tension spring member is used to When the upper end of the upper frame is pivotally connected to the lower end of the center frame and the center back part is pushed backward, the upper back part and the lower back part oscillate relative to each other and are displaced to the saw rack support posture. A seat apparatus, which is configured to be capable of being provided with a lock mechanism for engaging and disengaging the upper frame of the upper back portion and the lower frame of the lower back portion, respectively.