JPH0672207A - Seat device - Google Patents

Abstract

PURPOSE:To provide a seat device which offers a driver good 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. CONSTITUTION:A thorax control system 30 which displaces a cushion body 10a, is set in a back frame 20. This thorax control system 30 is constituted of an upper back control part 40 comprising an upper back control shaft 41 transversely mounted on the upper part of the back frame 20, an upper back transmission shaft 45 transversely mounted in the middle part, pulleys 42, 46 fixedly attached to the upper back control shaft 41 and the upper back transmission shaft 45, respectively, and a wrapping belt 48 fitted around the pulleys 42, 46 as being able to transmit the rotation, and a hips control part 50 comprising a hips control shaft 51 transversely mounted in the lower part of the back frame 20, a hips transmission shaft 55 transversely mounted in the middle part, pulleys 52, 53 fixedly attached to the hips transmission shaft 55 and the hips control shaft 51, respectively, and a wrapping belt 58 fitted around the pulleys 52, 53 as being able to transmit the rotation. The drive part 60 comprises gears 61, 62 fixedly attached to the upper back transmission shaft 45 and the hips transmission shaft 55, respectively, and engaged with each other so that an upper back part 11 and a lower back part 13 are connectedly moved and displaced to take a thorax support 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 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. 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 object is a seat device capable of adjusting to a sorax support posture which does not give a burden to the spine of a driver of a vehicle. The back contact part (10b) of the cushion body (10a) of the back (10) includes an upper back part (11) with which the upper part of the back of the driver abuts, and a lower back part (13) corresponding to the back of the driver's hip. And a center back portion (12) between the upper back portion (11) and the lower back portion (13), and the cushion body (10a) is attached to the back frame (20) supporting the cushion body (10a). Is provided with a soralux adjustment mechanism (30), and the soralux adjustment mechanism (30) is
It comprises an upper back adjusting part (40) provided corresponding to the upper back part (11), a hip adjusting part (50) provided corresponding to the lower back part (13), and a driving part (60). The upper back adjusting part (40) horizontally mounts an upper back adjusting shaft (41) on the upper part of the back frame (20) for tilting the upper back part (11) to a position where the upper back part (11) is in a sorax support posture. And the upper back transmission shaft (45) is laterally laid on the middle portion of the back frame (20) and pivotally mounted, and the upper back adjustment shaft (41) is provided at the side portion of the back frame (20). ) And the upper back transmission shaft (45) by fixing pulleys (42, 46) to the pulleys (42, 4).
6), a winding belt (48) is rotatably mounted so that the buttocks adjuster (50) has the lower back part (13) at the lower part of the back frame (20). A tail adjusting shaft (51) that tilts to a position to be in a sorax support posture is laterally mounted and pivoted, and a hip transmission shaft (55) is laterally mounted and pivotally mounted to an intermediate portion of the back frame (20). , A pulley (5) on each of the buttocks adjusting shaft (51) and the buttocks transmitting shaft (55) at the side portion of the back frame (20).
2, 53) are fixed to each other, and a winding ring zone (58) is rotatably transmitted between both pulleys (52, 53), and the drive section (60) is configured to transmit the upper back transmission. Gears (61, 62) are fixedly mounted on the shaft (45) and the butt transmission shaft (55), respectively, and the upper back part (11) and the lower back part (1).
And a rotation input member (65) for interlocking with 3) so as to be displaced to the saw rack support posture and rotating one of the gears.

[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.

The output member (45) is rotated to make the position of the sorax support. Buttocks adjustment axis (51)
When is rotated, one of the gears (61, 62) is rotationally driven, the gears (61, 62) are rotated in synchronization, and the upper back transmission shaft (45) and the hip transmission shaft (55) are rotated. , A pulley (4) fixed to the upper back transmission shaft (45) and the hip transmission shaft (55)
6, 56) also rotates.

Due to this rotation, the winding looped belt is wound between the pulleys (46, 56) and the pulleys (42, 52) fixed to the upper back adjusting shaft (41) and the hip adjusting shaft (51). (48, 58) are driven, and the upper back adjustment shaft (41) and the hip adjustment shaft (51) are rotated by the pulleys (42, 52).

In the upper back adjusting portion (40) corresponding to the upper back portion (11) with which the upper part of the driver's back comes into contact, the upper back adjusting shaft (41) swings to directly contact the upper back portion (11). Alternatively, the vehicle is indirectly advanced or retracted, and in the solex support posture, the back contact surface of the upper back portion (11) is displaced so as to come out relatively to the front of the center back portion (12), and the driver's state that a little occurs during driving is reduced. It becomes a state to hold.

Also in the hip adjusting portion (50) provided corresponding to the lower back portion (13) corresponding to the back of the driver's hip, the hip adjusting shaft (51) swings to displace the lower back portion (13). , Put the driver's hips in a sorax support position that holds them from behind.

Upper back adjusting shaft (41) and hip adjusting shaft (5
The back contact portion (10b) of the cushion body (10a) retains this state because 1) is constrained so that it cannot swing.
When not driving, the back contact portion (10b) can be used flat, and as described above, the cushion body (10a) sits comfortably with less fatigue in a sorax support posture that does not burden the spine of the driver. You can also drive a car.

[0019]

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 device is provided with a saw-lux adjusting mechanism 30 on a back frame 20 that supports a cushion body 10a of a seat back 10. The saw-lux adjusting mechanism 30 applies a burden to the spine of a driver of an automobile. It can be adjusted to the sorax support posture shown in FIGS. 4 and 5 which is not applied. The back frame 20 has side portions 21 and 21 on both sides.

The cushion body 10a 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 between the upper back portion 11 and the lower back portion 13. The back contact portion 10b includes a back portion 12, and body-side holding portions 10c on both sides. The cushion body 10a is integrally foam-molded from urethane foam or the like, or is a combination of separate bodies.

The back frame 20 which supports the cushion body 10a is provided with the above-mentioned saw-lux adjusting mechanism 30 for displacing the cushion body 10a. The saw-lux adjusting mechanism 30 is provided for the upper back portion corresponding to the upper back portion 11. It comprises a section 40, a hip adjusting section 50 provided corresponding to the lower back section 13, and a driving section 60.

The upper back adjusting section 40 is constructed as follows. On the upper part of the back frame 20, the upper back part 11
The upper back adjustment shaft 41 for tilting the position to the soralux support posture is provided on the side portion 21 of the back frame 20,
It is pivoted horizontally across 21. The upper back adjustment shaft 41 is
Upper back support member 4 for pushing the upper back portion 11 from the rear
It is fixed to 3. An upper spine transmission shaft 45 is pivotally mounted on the side portion 21 of the back frame 20 in an intermediate portion of the back frame 20 so as to extend laterally.

The side portion 21 on the side portion of the back frame 20
Pulleys 42 and 46 with teeth are fixed to the upper back adjusting shaft 41 and the upper back transmitting shaft 45, respectively.
A winding belt 48, which is a timing belt having internal teeth that mesh with the teeth of the pulleys 42 and 46, is mounted between 46 so that rotation can be transmitted.

The upper back support member 43 is an upper back adjustment shaft 41.
The upper edge of the cushion body 10a is provided so as to be tiltable forward, and the tilting displaces the upper back portion 11 of the back contact portion 10b of the cushion body 10a so as to bulge forward to provide a sorax support posture. It is something that In this case, it is preferable that the range of the tilt angle of the upper back support member 43 be set so as to form the sorax support posture shown in FIGS. 4 and 5.

The tail adjusting section 50 is constructed as follows. The hip adjusting portion 50 is pivotally attached to the lower portion of the back frame 20 with a hip adjusting shaft 51 that tilts the lower back portion 13 to a position where the lower back portion 13 is placed in a sorax support posture while being horizontally extended between the side portions 21 and 21 of the back frame 20. ing. The upper back adjusting shaft 41 is fixed to a hip support member 53 that pushes the upper back portion 11 from the rear side. A hip transmission shaft 55 is pivotally mounted laterally on the side portion 21 of the back frame 20 below the upper back transmission shaft 45 of the upper back adjusting unit 40 at an intermediate portion of the back frame 20.

The side portion 21 on the side portion of the back frame 20
Pulleys 52 and 53 having teeth are fixed to the hip adjusting shaft 51 and the hip transmitting shaft 55, respectively.
A winding ring belt 58, which is a timing belt having internal teeth that mesh with the teeth of the pulleys 52 and 56, is mounted between the shafts so that the rotation can be transmitted.

The butt support member 53 is provided such that the lower end edge thereof can be tilted forward around the base end of the butt adjustment shaft 51, and with this tilting, the lower back part of the back contact portion 10b of the cushion body 10a is tilted. 13 is displaced so as to bulge forward, and is placed in a sorax support posture. In this case, it is preferable that the range of the tilt angle of the buttocks support member 53 is set so as to form the sorax support posture shown in FIGS. 4 and 5 like the upper back support member 43.

The drive unit 60 is constructed as follows.
In the side portion 21 of the back frame 20, the upper back transmission shaft 45
Gears 61 and 62 are fixedly mounted on the rear and the rear end transmission shaft 55, respectively.
The lower back portion 13 is interlocked with the lower back portion 13 so that the lower back portion 13 and the lower back portion 13 are interlocked with each other so that the lower back portion 13 and the lower back portion 13 are displaced to the sorax support posture. Gear 62
The pivot shaft of the rotary input member 65 forms the rotation input member 65, and the rotation input member 65 may be rotated by power. In the embodiment, the operation shaft 67 extends through the braking mechanism 66, and the operation shaft 6
A handle 68 is fixed to the end of 7. An angle scale 68a is attached to the outer periphery of the handle 68, and it is possible to know that the backlash portion 10b is in the sorax support posture by the index 68b attached to the side surface of the cushion body 10a. .

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 posture to the saw rack support posture, and holds the upper back support member 43 and the hip support member 53 in the respective states. Even if you sit for a long time, you can get a feeling of sitting without straining the spine and fatigue.

The output member 45 is rotated to bring it into the sorax support posture. The braking mechanism 66 suppresses the rotational force from the rotation input member 65 side but does not resist the rotation from the operation shaft 67 side. Therefore, when the handle 68 is rotated with the handle 68, the operation shaft 67 rotates and the upper back transmission shaft. 45 is rotated, whereby the hip adjustment shaft 51 is rotated. Buttocks adjustment axis 51
When is rotated, the gear 62 is rotationally driven, the gear 61 is rotated in synchronization, the upper back transmission shaft 45 and the hip transmission shaft 55 are rotated, and the upper back transmission shaft 45 and the hip transmission shaft 55 are fixedly installed. The pulleys 46 and 56 also rotate.

By this rotation, the pulleys 46, 56 and the pulley 4 fixed to the upper back adjusting shaft 41 and the hip adjusting shaft 51 are fixed.
The winding loops 48 and 58 mounted between the belts 2 and 52 are driven, and the upper back adjustment shaft 41 and the buttocks adjustment shaft 51 are rotated by the pulleys 42 and 52.

In the upper back adjusting portion 40 corresponding to the upper back portion 11 with which the upper part of the driver's back contacts, the upper back adjusting shaft 4
1 swings and the upper back support member 43 tilts, the upper back portion 11 is pushed from the rear side to move forward and backward, and in the sorax support posture, the back contact surface of the upper back portion 11 is relative to the center back portion 12. Displaces to the front and becomes a state in which the driver's state that occurs a little during driving is maintained.

In the hip adjusting portion 50 provided corresponding to the lower back portion 13 corresponding to the back of the driver's hip, the hip adjusting shaft 51 is also provided.
Swings to tilt the hip support member 53 and pushes the lower back portion 13 to bring the driver's hip into a sorax support posture in which the hip is held from behind.

By reading the angle scale 68a on the outer circumference of the handle 68 with the index 68b on the side surface of the cushion body 10a, the state of the back contact portion 10b can be known, and it can be known that the posture has reached a predetermined value. You can

The upper back adjustment shaft 41 and the buttocks adjustment shaft 51 are non-pivotally restrained by a braking mechanism 66, and the cushion body 1
The back contact portion 10b of 0a holds this state. When not driving, the back contact portion 10b can be flattened and used, and as described above, the cushion body 10a does not burden the spine of the driver and sits comfortably with less fatigue in a sorax support posture to drive the vehicle. You can also do it.

In the above embodiment, the upper back support member 43 and the buttocks support member 53 make the upper back portion 11,
Although the lower back portion 13 is pushed from the rear to indirectly displace the upper back portion 11 and the lower back portion 13,
The upper back adjusting shaft 41 and the hip adjusting shaft 51 may be directly fixed to the upper back portion 11 and the lower back portion 13 to be displaced. Although a scale and an index are provided in order to know the posture of the sorax support, a sensor may be used, and in the case of electrically driving, the electric circuit may be controlled by an encoder or the like.

[0038]

According to the seat apparatus of the present invention, the upper back portion and the lower rear axle portion can be synchronized with each other to take a sorax support posture by interlocking the upper back adjusting shaft and the hip adjusting shaft. Therefore, it is possible to easily adjust to a sorax support posture that does not cause fatigue even if the driver of the vehicle sits for a long time, and sit comfortably in a sorax support posture that does not burden the spine of the driver. You can drive a car.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a seat device according to an embodiment of the present invention, omitting main parts.

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 vertical cross-sectional view of a drive unit of 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 an explanatory diagram showing a seated state in a sorax support posture.

FIG. 6 is an explanatory diagram showing a state of a spine of a human body in an upright posture.

FIG. 7 is an explanatory view showing a support posture in a conventional seat device.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Seat back 10a ... Cushion body 10b ... Back contact part 11 ... Upper back part 12 ... Center back part 13 ... Lower back part 20 ... Back frame 21 ... Side part 30 ... Sora Lux adjusting mechanism 40 ... Upper back adjusting part 41 ... Up Back adjustment shaft 42, 46 ... Pulley 45 ... Upper back transmission shaft 48 ... Winding ring belt 50 ... Butt adjustment portion 51 ... Butt adjustment shaft 52, 56 ... Pulley 55 ... Butt transmission shaft 58 ... Winding belt 60 ... Drive portion 61, 62 ... Gear 65 ... Rotation input member 66 ... Braking mechanism 68 ... Handle 68a ... Angle scale 68b ... Index

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 upper back portion, the lower back portion corresponding to the back of the driver's hips, and the center back portion between the upper back portion and the lower back portion, and the cushion body is displaced on a back frame that supports the cushion body. A soralux adjusting mechanism is provided, which comprises an upper back adjusting portion provided corresponding to the upper back portion, a hip adjusting portion provided corresponding to the lower back portion, and a driving portion. The upper back adjusting unit horizontally mounts an upper back adjusting shaft on the upper portion of the back frame for tilting the upper back unit to a position where the upper back unit is in a sorax support posture. In addition to being pivotally mounted, the upper back transmission shaft is laterally pivotally mounted at an intermediate portion of the back frame, and pulleys are respectively fixed to the upper back adjustment shaft and the upper back transmission shaft at the side portions of the back frame. And a wrapping belt is mounted between both pulleys so as to be capable of transmitting the rotation, and the butt adjustment part tilts the lower back part to a position where the lower back part is placed in a sorax support posture on the lower part of the back frame. The hip adjustment shaft is laterally and pivotally attached, and the hip transmission shaft is laterally and pivotally attached to the middle portion of the back frame, and the hip adjustment shaft and the hip transmission shaft are attached to the side portion of the back frame. The pulleys are fixed to each other, and a winding ring belt is hung between the pulleys so as to be capable of transmitting the rotation. The drive unit has gears fixed to the upper back transmission shaft and the rear transmission shaft, respectively. Then, the upper back part and the lower back part are in a sorax support figure. A seat device, comprising: a rotation input member that meshes so as to be displaced in association with a force and rotates one of the gears.