JPH0672214A - Seat device - Google Patents

Abstract

PURPOSE:To provide a seat device which offers a driver a 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 mechanism 30 comprising an upper back control part 40 correspondently set with an upper back part 11, a hips control part 50 correspondently set with a lower back part 13 and a drive part 60, is mounted on a back frame 20. The upper back control part 40 comprises an upper part link member 41 pivotally supported as being able to swing around a horizontal upper back control and support shaft 45, and supports the upper back part 11 as being able to be tilted to take a thorax support posture. The hips control part 50 comprises a lower part link member 51 pivotally supported with the back frame 20 as being able to swing around a horizontal hips control and support shaft 55, and supports the lower back part 13 as being able to be tilted to take a solex support posture. The drive part 60 is equipped with a driving member for moving a control and drive shaft 31 which connects the upper part link member 41 and the lower part link member 51 with each other, backward and 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. 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 section (40) pivotally supports the upper link member (41) on the back frame (20) so as to be swingable around a horizontal upper back adjusting support shaft (45), and the upper back section (40) is supported. An upper back support member (44) is supported by the upper link member (41) so that the upper link member (41) can be tilted to a position where it is moved forward relative to the center back portion (12) to be in a sorax support posture. The hip adjustment part (5
0) pivotally supports the lower link member (51) on the back frame (20) so as to be swingable about a horizontal buttocks adjustment support shaft (55), and causes the lower back portion (13) to move backward from the buttocks of the driver. From the upper link member (41), the hip support member (54) is supported by the lower link member (51) so that the lower link member (51) can be tilted to a position where it is moved forward so as to be held in a sorax support posture. ) And the upper end of the lower link member (51) are pivotally connected by the adjusting drive shaft (31), and the upper back adjusting support shaft (45) and the lower link member (51) of the upper link member (41) are connected. ) The tail adjusting support shaft (55) and one of the support shafts are slidably fitted and pivotally supported by the corresponding link members, and the drive section (60) is provided with the upper link member (41). And the lower link member (51 It said adjustment drive shaft connecting bets (3
A seat device, comprising a drive member (65) for moving 1) back and forth.

[0013]

Operation: The driver of the vehicle is
0) is operated to displace the seat back (10) to adjust to the sorax support posture, and the upper back support member (4
4) and the buttocks support member (54) are held in the respective states, and the upper back portion (11) and the lower back portion (1)
3) Put it in a position that takes the Sorlux support posture,
Even if you sit for a long time, you can get a feeling of sitting without straining the spine and fatigue.

[0014] The drive member (65) is operated to move to the sorax support posture. When the adjusting drive shaft (31) is moved back and forth by the drive member (65), the lower end portion of the upper link member (41) becomes The upper ends of the lower link members (51) are displaced back and forth, and the upper back adjustment support shafts (45) respectively.
And pivot around the buttocks adjustment support shaft (55). One of the upper spine adjustment support shaft (45) of the upper link member (41) and the hip adjustment support shaft (55) of the lower link member (51) slides on the corresponding link member. Rotate.

In the upper back adjusting section (40), the upper link member (41) swings around the horizontal upper back adjusting support shaft (45) with respect to the back frame (20), and the upper link member (41). Since the upper end portion of the vehicle tilts by the swing angle and the lower portion moves back and forth, the upper back support member (44) pushes while tilting the upper back of the driver, and the upper back portion (11) pushes the center back portion (12). When it is displaced relatively forward, it assumes a sorax support posture.

In the buttocks adjusting portion (50), the lower link member (51) swings around the horizontal buttocks adjusting support shaft (55) with respect to the back frame (20), and the lower link member (51).
When the lower end portion of the lower back portion (1) is relatively advanced and is relatively displaced forward relative to the center back portion (12),
In 3), the driver tilts to a position where the driver's hips are held from behind in a sorax support posture.

Adjusting drive shaft (31) when not operating
Can also be used by flattening the back contact part (10b), and the cushion body (10a) can be used to comfortably drive the vehicle while sitting in a sorax support position in which the spine of the driver is not burdened. can do.

[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. 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.

Cushion body 10a of the seat back 10
Is the upper back portion 11 with which the upper part of the back of the driver comes into contact.
And the lower back part 13 corresponding to the back of the driver's hips,
The back contact portion 10b is composed of the center back portion 12 between the upper back portion 11 and the lower back portion 13, and the 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.

A back frame 20 which supports the cushion body 10a is provided with a saw-lux adjusting mechanism 30 for displacing the cushion body 10a. The saw-lux adjusting mechanism 30 is provided on the upper back portion corresponding to the upper back portion 11. It is composed of an adjusting unit 40, a hip adjusting unit 50 provided so as to correspond to the lower back unit 13, and a driving unit 60.

The upper back adjusting section 40 is constructed as follows. The upper link member 41 is rotatably supported around the horizontal upper back adjustment support shaft 45, which is installed between the side frames 21 and 21 of the back frame 20, so as to be swingable. The upper link member 41 has rocking frame plates 42, 42 on the left and right, and the upper link adjusting support shaft 45 is inserted into the long holes 43, 43 formed in the rocking frame plates 42, 42 so that the upper link. The member 41 is slidably supported on the upper back adjustment support shaft 45. At the upper end of the upper link member 41, the swing frame plate 4 is provided.
Upper back support member 44, which is a rod for connecting 2, 42
However, the upper back portion 11 is supported so as to be tiltable to a position in which the upper back portion 11 is displaced forward relative to the center back portion 12 so as to be in a sorax support posture.

The tail adjusting section 50 is constructed as follows. A lower link member 51 is pivotally supported on the back frame 20 so as to be swingable around a horizontal hip adjustment support shaft 55. The lower link member 51 has swing frame plates 52, 52,
The hip adjustment support shaft 55 is inserted and fixed to the swing frame plates 52, 52. A position where a butt support member 54, which is a rod erected on the lower end between the swing frame plates 52, 52, relatively moves forward to lower the lower back part 13 so as to hold the driver's butt from the rear, and brings the lower back part 13 into the saw rack support posture. It is supported so that it can be tilted.

The lower end of the upper link member 41 and the upper end of the lower link member 51 are pivotally connected to each other by an adjusting drive shaft 31, and as can be seen in FIG.
Is inserted into the longitudinal holes 22, 22 in the front-rear direction of the side frames 21, 21 of the back frame 20 and projects laterally.

The drive unit 60 is provided so as to displace the end portions of the adjustment drive shafts 31, 31 protruding laterally of the elongated holes 22, 22 back and forth. Long holes 22 on the side surface of the side frame 21
A braking restraint mechanism 62 is mounted below the. As can be seen in FIG. 2, the braking restraint mechanism 62 includes the back frame 20.
Has a drive shaft 62a that projects inward from the side frame 21 and an input shaft 62b that extends laterally. Even if a force is applied from the drive shaft 62a side, there is a strong resistance and it cannot rotate, and When the force is applied from the shaft 62b, the drive shaft 62 is
This is to rotate a in conjunction with a.

The base of the drive member 65 is fixed to the drive shaft 62a inside the side frame 21 of the back frame 20. The drive member 65 moves from the drive shaft 62a to the adjustment drive shaft 31.
The upper link member 41 has an arm shape extending to
The adjustment drive shaft 31 is inserted through the elongated hole 65a and engaged so as to move the adjustment drive shaft 31 connecting the lower link member 51 and the lower link member 51 back and forth.

A handle 66 is attached to the end of the input shaft 62b of the braking restraint mechanism 62, and an angle scale 66a for confirming the saw rack support posture is attached to the outer periphery of the handle 66, and an index corresponding to the angle scale 66a. 66b is attached to the side surface of the body-side holding portion 10c of the cushion body 10a. A drive unit similar to the above is also provided on the opposite side.

Next, the operation will be described.

The driver of the vehicle operates the saw-lux adjusting mechanism 30 to displace the seat back 10 to adjust the seat-back support posture, hold the upper back support member 44 and the hip support member 54 in the respective states, The upper back portion 11 and the lower back portion 13 are positioned so as to have a sorax support posture, and it is possible to obtain a sitting sensation in which the spine is not burdened with fatigue even when sitting for a long time.

The drive member 65 is operated to move to the sorax support posture, that is, when the handle 66 is grasped and rotated, the input shaft 62b can be rotated in a resistance crying operation in cooperation with the drive shaft 62a. 65 is the drive shaft 62
The adjustment drive shaft 31 is moved back and forth by the drive member 65 swinging about a. The lower end of the upper link member 41 and the upper end of the lower link member 51 are displaced forward and backward, and rotate about the upper back adjustment support shaft 45 and the hip adjustment support shaft 55, respectively. The upper spine adjustment support shaft 45 of the upper link member 41 slides and rotates in the elongated hole 43.

In the upper back adjusting portion 40, the upper link member 41 swings with respect to the back frame 20 around the horizontal upper back adjusting support shaft 45, and the upper end portion of the upper link member 41 tilts by the swing angle. Since the lower part moves back and forth, the upper back support member 44 pushes the upper back part 11 while tilting the upper back of the driver, and when the upper back part 11 is displaced forward relative to the center back part 12, the saw is moved. It becomes a Lux support posture.

In the tail adjusting portion 50, the horizontal hip adjusting support shaft 5 is provided.
5 around the back frame 20 to the lower link member 5
1 swings, the lower end portion of the lower link member 51 relatively advances and is relatively advanced and displaced relative to the center back portion 12, the buttocks support member 54 moves the buttocks of the driver through the lower back portion 13. Tilt to the position that holds the SORAX support posture from the rear.

When the driver does not drive, the adjustment drive shaft 31 can be retracted and the back contact portion 10b can be flattened for use. In the sorax support posture in which the cushion body 10a does not burden the spine of the driver, fatigue is reduced. You can sit down and drive your car comfortably.

When the drive member 65 is rotated to an appropriate position while checking the angle graduation 66a of the handle 66 with the index 66b, as shown in FIG. 3, the upper member pushed by the upper back support member 44 and the hip support member 54 is pressed. The back portion 11 and the lower back portion 13 are in a position of assuming a sorax support posture. When stopped, drive member 65 to drive shaft 62
Even if an attempt is made to rotate a, the braking restraint mechanism 62 becomes a strong resistance and cannot rotate, and this state is maintained. Upper back part 1 in the Sorrax support position
The back contact surface of No. 1 is displaced relatively to the front of the center back portion 12, and the state where the driver's state, which occurs a little during driving, is maintained.

In the above embodiment, the attitude of the saw rack support can be known by the angle scale and the index. However, the position may be known by a sensor, and in the case of driving by power, an encoder circuit is used. It goes without saying that you may want to know it.

[0035]

According to the seat apparatus of the present invention, the upper link member and the lower link member are swung so as to be mutually bent, and the upper back portion and the lower back portion are synchronized with each other to take a sorax support posture. This allows the driver to easily adjust to a sorax support position where fatigue does not accumulate even if the driver of the vehicle sits for a long time, and a sorax support position that does not burden the spine of the driver is comfortable. You can sit down and 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 vertical cross-sectional view of a drive unit of a seat device according to an embodiment of the present invention.

FIG. 3 is an explanatory side view showing an operating state of 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 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]

 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 ... Sorlux adjusting mechanism 31 ... Adjusting drive shaft 40 ... Upper back Adjustment part 41 ... Upper link member 44 ... Upper back support member 45 ... Upper back adjustment support shaft 50 ... Butt adjustment part 51 ... Lower link member 54 ... Butt support member 55 ... Butt adjustment support shaft 60 ... Drive part 62 ... Braking restraint mechanism 65 ... Driving member 66 ... Handle 66a ... Angle scale 66b ... Index

Claims (1)

[Claims] 1. A seat device capable of being adjusted to a Lux support posture so as not to give a strain to a 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 part of the back of the driver. The cushion body is composed of a back frame, 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. A soralux adjusting mechanism is provided, wherein the soralux adjusting mechanism includes an upper back adjusting portion provided inside the upper back portion, a butt adjusting portion provided inside the lower back portion, and a drive portion, The upper back adjusting portion pivotally supports an upper link member on the back frame so as to be swingable around a horizontal upper back adjusting support shaft, and the upper back portion is relatively positioned relative to the center back portion. The upper link member supports an upper back support member so that the upper link member can be tilted to a position where it is moved forward to be in a sorax support posture, and the buttocks adjusting portion horizontally butts the lower link member to the back frame. The lower link member is pivotally supported about an axis, and the lower link member is tilted to a position in which the lower back portion is relatively forward-displaced so as to hold the driver's hip from the rear to be in a sorax support posture. A bottom support member is supported, and a lower end portion of the upper link member and an upper end portion of the lower link member are pivotally connected to each other by an adjusting drive shaft, and an upper back adjusting support shaft of the upper link member and a lower end of the lower link member. One of the adjustment support shafts and the support shaft is slidably fitted to the corresponding link member to pivotally support the drive shaft, and the drive unit is configured to support the upper link member and the lower link. Seat apparatus characterized by comprising a driving member for moving back and forth the adjusting drive shaft for connecting the timber.