JPH0672217A - Seat device - Google Patents

Abstract

PURPOSE:To displace the upper back part and the lower back part of a seat back respectively so as to adjust it in a thorax support posture and provide a driver a comfortable sitting feeling even in a long drive by operating a Solex adjusting mechanism. CONSTITUTION:A support part for a seat back 10 is so adjusted that adjusting rods 31 installed vertically symmetric to the right and left of a back frame 20 are rotated so as to project their bow shape backward. That is, when the adjusting rods 31 are rotated, shaft stools 32, 32... are also shifted so that the adjusting rods 31, 31 on both sides are forced to expand each other. Then the adjusting rods 31 of back support bodies 40, 40... are drawn so as to be fallen out from cylindrical bodies 41 fixed horizontally on respective back parts and the back support part 40 is extended as a whole. Then the upper back part 11 and lower back part 13 are positioned to project forward so as to tilt relatively to the center back part 12 so that the driver can sit in such a thorax support posture as hunching his back up and shifting his hips forward.

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 strain 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 the above conclusion, the gist of the present invention for achieving the above object is to provide a seat device capable of adjusting to a sorax support posture that does not burden the spine of a driver of a vehicle. The back contact part of the cushion body of the back (10) includes an upper back part (11) with which the upper part of the back of the driver abuts, a lower back part (13) corresponding to the back of the driver's hip, and the upper back part. (11)
The center back portion (1) between the lower back portion (13) and the lower back portion (13)
2) and a back frame (20) supporting the cushion body is provided with a soralux adjusting mechanism (30) for displacing the cushion body, and the soralux adjusting mechanism (30) includes the back frame (20). 20) An adjusting rod (3) which has an arc shape having curves corresponding to the postures of the thorax support and is driven to rotate during adjustment.
1, 31) are symmetrically installed vertically and pivotally supported, and a plurality of back part holders (40, 4) are provided between the left and right adjusting rods (31).
0 ...) are erected, and the plurality of back portion holders (40, 40)
...) respectively holding the upper back portion (11), the center back portion (12) and the lower back portion (13), and the back portion holding bodies (40, 40 ...) Are horizontal to the respective back portions. And a cylindrical body (41) fixed to the adjusting rod (31) so that the cylindrical body (41) can be retracted when the adjusting rod (31) is rotated to adjust to a sorax support posture. ) Bearing bodies (32,3)
2 ...) via the joints (35) via the rods (42) on both sides which are connected to each other.

[0013]

Operation: The driver of the vehicle is
0) is operated to displace the seat back (10) to adjust to the soralux support posture, and the upper back part (11)
The lower back part (13) and the lower back part (13) can be held in the respective states, and a sitting feeling that does not cause fatigue to the spine even if the user sits for a long time and is less likely to fatigue can be obtained.

Adjustment of the back contact portion of the cushion body of the seat back (10) is carried out by rotating an adjusting rod (31) vertically symmetrically provided on the left and right sides of the back frame (20). When the adjusting rod (31) is rotated so that the bow having a curve corresponding to the thorax support posture is projected rearward, the upper back part (11) with which the upper part of the back of the driver abuts is moved to the forward position. Also, the lower back part (13) corresponding to the back of the driver's hip is also in the forward position, and the center back part (12) is the upper back part (11).
It is located relatively rearward with respect to the lower back portion (13).

When the bow of the adjusting rod (31) faces sideways and is housed in the back frame (20), the upper back part (11), the center back part (12) and the lower back part (13) are substantially flush with each other. It is flat and continuous.

When the adjustment rod (31) is rotated so that the bow shape protrudes rearward when adjusting from the flat state to the soralux support posture, the positions of the bearing bodies (32, 32 ...) Are also changed. Corresponding positions of the adjusting rods (31) on both sides try to widen each other, and the back holders (40, 40)
The adjusting rod (31) of (...) Pulls out from the cylindrical body (41) horizontally fixed to each back portion, and the back portion holding body (40) extends as a whole. The change in posture is absorbed by the displacement of the joint portion (35).

In the sorax support posture, the driver's chest, which is slightly awake, is held by the upper back portion (11),
The butt part that came out a little while ago is held by the lower back part (13),
It is possible to drive in a posture in which the spine is not burdened and fatigue is reduced, and as a result, comfort can be maintained for a long time.

When adjusting from the Sorrax support posture to a flat state, the adjusting rod (31) rotates in the opposite manner to the above, and the adjusting rod (31) is displaced so that the bow shape fits in the back frame (20). , Bearing body (32, 32
...) also changes position, and the corresponding positions of the adjusting rods (31) on both sides try to approach each other, and the back part holder (4)
0, 40 ...) The adjustment rod (31) is pushed and the cylinder (4
Immerse yourself in 1) and degenerate as a whole. The change in posture is absorbed by the displacement of the joint portion (35).

In this way, the seat back (10) can be conveniently used by adjusting the seat back (10) to the sorax support posture or by flattening it, if desired.

[0020]

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 includes a cushion body supported on a back frame 20 of the seat back 10, and a sorax adjustment mechanism 30 provided on the back frame 20. The sorax adjustment mechanism 30 applies a burden to the spine of a vehicle driver. It is not adjustable in the sorax support posture shown in FIGS. 5 and 6.

The cushion body includes an upper back portion 11 with which the upper part of the back of the driver abuts, a lower back portion 13 corresponding to the back of the driver's hip, and a center back between the upper back portion 11 and the lower back portion 13. Part 12 and is integrally foam-molded from urethane foam or the like. In the embodiment, each is a separate body, but it may be an integral body in which the whole is connected.

The saw rack adjusting mechanism 30 is constructed as follows. Adjustment rods 31, 31 that are rotationally driven during adjustment are symmetrically and vertically supported on the left and right sides of the back frame 20. The adjusting rod 31 is vertically installed between thrust bearings 23a and 23b mounted on the upper beam 21 and the lower beam 22 of the back frame 20, and has an arch shape having a curve corresponding to the posture of the saw rack support.

A plurality of back portion holders 40, 40 ... Are installed between the left and right adjusting rods 31, and an upper back portion 11, a center back portion 12 and a lower back portion are attached to the plurality of back portion holders 40, 40. The parts 13 and 13 are held respectively.

As can be seen from FIGS. 1, 3 and 4, the back part holding body 40 has a cylindrical body 41 horizontally fixed to each back part, and an adjusting rod 31 rotating to adjust to a saw rack support posture. And a rod 42 that fits into the tubular body 41 so that the rod 41 can be pulled out.

The adjusting rod 31 includes a plurality of bearing bodies 32,
32 ... are fitted and mounted in positions determined by the stopper 33, and the connecting piece 32a provided on the outer ring of the bearing body 32 is connected to the connecting piece 42a at the end of the retractable rod 42 of the back part holding body 40 by the joint shaft 43. It is connected. The coupling piece 32 a of the bearing body 32 and the coupling piece 42 a of the retractable rod 42, which are coupled by the joint shaft 43, form a joint portion 35.

The back portion holder 40 is composed of the upper back portion 1
1, a pair is provided for each back body of the center back portion 12 and the lower back portion 13, and the pair of cylindrical bodies 41, 41 are respectively fixed to the upper end portion and the lower end portion of the back surface of each back body.

Crown gears 36 are fixed to the lower ends of the left and right adjusting rods 31, 31, respectively, and an operating shaft 38 for supporting a gear 37 meshing with the gear 36 is provided on the back frame 20.
It is inserted through the side pillars 25 and is supported by being connected to the braking restraint member side pillars 25, and a handle 39 is fixed to the end of the operation shaft 38. The side pillar 25 has a large resistance against the rotation of the operation shaft 38 from the gear 37 side and has no resistance against the rotation from the handle 39 side.

An angle scale 39a is provided on the outer periphery of the handle 39, and by comparing it with an index provided on the side surface of the side column 25 of the back frame 20, it is possible to confirm that the back contact portion is in the sorax support posture. You can know it.

Next, the operation will be described.

The driver of the automobile operates the saw rack adjusting mechanism 30 to displace the seat back 10 to adjust the seat back to the posture, and keeps the upper back portion 11 and the lower back portion 13 in the respective states for a long time. Even if you sit down, you can get a feeling of sitting without straining the spine.

The back contact portion of the cushion body of the seat back 10 is adjusted by rotating an adjusting rod 31 vertically symmetrically installed on the left and right sides of the back frame 20. In FIG. 1, the bow shape of the adjusting rod 31 is housed in the back frame 20, and as shown in FIGS. 2A and 3A, the bow shape of the adjusting rod 31 faces sideways and is housed in the back frame 20. In the state, the upper back part 11, the center back part 12, and the lower back part 13 are continuous on the same plane and are flat. So, if you grab the handle 39 and rotate it,
The side pillar 25 does not act as a resistance and can rotate the gear 37.

When the gear 37 is rotated, the gear 36 is also rotated so that the adjusting rod 31 projects rearward around the vertical axis between the bearings 23a and 23b so as to project a bow having a curve corresponding to the saw rack support posture. The adjusting rod 31 rotates.

When the bow shape is projected rearward to be in the sorax support posture, as shown in FIGS. 2 (b) and 3 (b), the upper back portion 1 against which the upper part of the back of the driver comes into contact.
1 is in the front position, the lower back part 13 corresponding to the back of the driver's hip is also in the front position, and the center back part 12 is relative to the upper back part 11 and the lower back part 13. Located behind.

As described above, when the adjustment rod 31 is rotated so that the bow shape projects rearward when the flat state is adjusted to the sorax support posture, the positions of the bearing bodies 32, 32, ... Are also changed. The corresponding positions of the adjusting rods 31 on both sides try to widen each other, and the adjusting rods 31 of the back holders 40, 40 ... Pull out back part holder 4
0 extends as a whole. The change in posture is absorbed by the displacement of the joint portion 35.

By reading the angular scale 39a on the outer circumference of the handle 39 from the index of the side surface of the cushion body, the state of the back contact portion can be known, and it can be known that the sollux support posture has a predetermined value. In the Thorax support position, the chest of the driver who is a little awake is held by the upper back portion 11, and the hip portion that is slightly forward is lower back portion 1.
It is possible to drive in a posture in which the spine is not burdened and fatigue is reduced, and as a result, comfort can be maintained for a long time.

When adjusting from the Sorrax support posture to a flat state, the adjusting rod 31 rotates in the opposite manner to the above, and the adjusting rod 31 is displaced so that the bow shape fits in the back frame 20. ... also change their positions, and the corresponding positions of the adjusting rods 31 on both sides try to approach each other, and the adjusting rods 31 of the back portion holders 40, 40 ... Are pushed into the tubular body 41 and retract as a whole.
The change in posture is absorbed by the displacement of the joint portion 35.

Thus, if desired, the seat back 1
0 can be used conveniently by adjusting or flattening it to the Sollux support position. Even if a force to rotate the adjusting rod 31 is applied during use, the gear 37
Since the rotation of the seat back 10 is suppressed by the side pillars 25, the seat back 10 is held in this state.

As described above, it is also possible to drive the vehicle while sitting comfortably with less fatigue in a sorax support posture in which the cushion body does not put a burden on the spine of the driver.

In the above embodiment, the scale and the index are provided in order to know the posture of the saw rack support. However, a sensor may be used, and when it is electrically operated, it is controlled by an electric circuit by an encoder or the like. May be.

[0040]

According to the seat device of the present invention, bow-shaped adjusting rods having a curve corresponding to the sorax support posture are arranged on the left and right sides of the back frame, and the back portions are rotated by rotating the adjusting rods. Since it is possible to take a slacks support posture in synchronism, it is possible to easily adjust to a slacks support posture that does not cause fatigue even if the driver of the vehicle sits for a long time, and it is a burden on the spine of the driver. You can comfortably sit and drive the car in a Sorax support posture that does not put on.

[0041]

[Brief description of drawings]

FIG. 1 is a front view of a seat device according to an embodiment of the present invention, in which main parts of a seat back are omitted.

FIG. 2 is a side effect view showing an operating state of the seat device according to the embodiment of the present invention.

FIG. 3 is a plane action explanatory diagram showing an operating state of the seat apparatus according to the embodiment of the present invention.

FIG. 4 is a perspective view of a connecting portion between a back portion holder and an adjusting rod.

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 back 11 ... Upper back part 12 ... Center back part 13 ... Lower back part 20 ... Back frame 25 ... Side pillar 30 ... Sorlux adjusting mechanism 31 ... Adjusting rod 32 ... Bearing body 35 ... Joint part 40 ... Back part holding body 41 ... Cylindrical body 42 ... Leaving rod 39 ... Handle 39a ... Angle scale

Claims (1)

[Claims] 1. A seat device capable of adjusting to a sorax support posture that does not burden the spine of a driver of an automobile, wherein a back contact portion of a cushion body of a seat back is in contact with an upper portion of the back of the driver. The cushion body is displaced on a back frame which is composed of an upper 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 which supports the cushion body. A sorax adjusting mechanism is provided, wherein the sorax adjusting mechanism has an arched shape having a curve corresponding to the sorax support posture on the left and right sides of the back frame, and symmetrically adjusts an adjusting rod that is rotationally driven during adjustment. It is vertically installed and pivotally supported, and a plurality of back part holders are installed between the left and right adjustment rods. Section, center back section, and lower back section, respectively, and the back section holding body is a cylinder that is horizontally fixed to each back section, and the adjusting rod is rotated to adjust to a sorax support posture. A seat device, characterized in that the seat device comprises two rods which are fitted into the tubular body so as to be able to extend and retract at the same time and are connected to a bearing body fitted in the adjusting rod through a joint portion.