JPH06199163A - Seat device - Google Patents

Abstract

PURPOSE:To provide a tireless seat device by which a stable seating feeling can be obtained without applying a burden to the backbone even when a driver performs maneuvering operation while seating for many hours. CONSTITUTION:When a cylindrical cam part member 44 constituting a driving part 40 of a thorax adjusting mechanism 30 is driven in rotation, an upper back part 11 displaces by followers 41 and 42 to move rectilinearly in a longitudinal direction according to it so as to push the back of a driver forward relatively, and a lower back part 13 advances, and holds the hips of the driver from behind.

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 stable seating feeling without giving a load to the seated person's spine. As shown in FIG. 7, when the person M stands upright, the back of the person M has a so-called S in which the upper rear part of the waist enters.
It has a glyph. 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, 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 are also time factors. Even if the spine is not initially burdened and comfortable, the comfort does not always last. According to the old theory, the driver is not always comfortable, and fatigue is accumulated 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, as shown in the range A, the upper body is raised to the back of the cat, and in the lower part, the hips are moved forward as shown in the range B, so that the spine is not burdened and comfortable. It has been concluded that holding the person M as shown in FIG. 6 is the posture in which fatigue is the least likely, 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-mentioned object is a seat device (10a) which can be adjusted to a sorax support posture that does not give a load to the spine of an automobile. 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 hips, and the upper back part (11). A back frame (2) comprising a center back part (12) between the lower back part (13) and the cushion body.
0) is provided with a soralux adjusting mechanism (30) for displacing the cushion body, and the soralux adjusting mechanism (30) is provided.
Comprises a back adjusting part (31) provided on the back side of the upper back part (11), a hip adjusting part (33) provided on the back side of the lower back part (13), and a drive part (40), The back adjustment part (31) is the upper back part (11).
The back frame (20) in order to displace the upper part of the back of the driver relatively to the front of the back position of the back part and to hold the upper back part (11) in such a position of the sorax support posture. ) Has an upper back support member (31) supported so as to be tiltable in the front-rear direction, and the hip adjustment section (33) relatively moves the lower back section (13) when taking a sorax support posture. In order to hold the driver's hips from the rear by displacing the hips to the front, the back frame (20) has a hip support member (34) supported so as to be tiltable in the front-rear direction, and the drive is provided. The part (40) is supported by the back frame (20) so as to be movable in the front-rear direction, and the upper back support member (3).
1) an upper back support follower (41) engaged from the rear, and a rear support movably supported by the back frame (20) in the front-rear direction and engaged with the rear support member (34) from the rear. The follower (42) is rotatably supported by the back frame (20) via a pivot (43) extending in the front-rear direction,
Each of the followers (41, 42) is provided with a peripheral cam surface portion (45) with which a rear end portion of the follower (41, 42) engages, and when rotated, the upper back support member (31) via the upper back supporting follower (41). ) And a cylindrical cam member (45) for tilting the buttocks support follower (42) to tilt the buttocks support member (34). ).

[0013]

Operation: The driver of the automobile is required to adjust the soralux adjustment mechanism (3
0) is operated to displace the seat back (10) to adjust the seat back support posture to the upper back support member (3
1) and the buttocks support member (34) are held in the respective states, and a stable seating feeling can be obtained without giving a strain to the spine even when sitting for a long time.

When the cylindrical cam member (44) of the drive unit (40) is rotated by power, the upper back support follower ((4) engaged with the peripheral cam surface portion (45) of the cylindrical cam member (44). 41) and the buttocks supporting follower (42) linearly move in the front-rear direction in response to changes in the unevenness of the peripheral cam surface portion (45).

As a result, the back adjusting portion (3) provided on the back side of the upper back portion (11) with which the driver's upper back portion abuts.
In 1), the upper back support follower (4
The upper back support member (31) supported from the rear by 1) tilts, and accordingly, the upper back portion (11).
Is displaced so that the upper back of the driver is placed in the sorax support posture relatively forward of the back position of the back.

Further, the hip adjusting portion (33) provided on the back side of the lower back portion (13) corresponding to the back of the driver's hips,
The rotation of the cylindrical cam member (44) tilts the buttocks support member (34) supported from the rear by the buttocks support follower (42) that moves linearly. When the lower back portion (13) is displaced relatively to the front due to the tilting of the hip support member (34), the lower back portion (13) assumes a sorax support posture in which the hip of the driver is held from the rear.

The upper back support member (31) and the hip support member (34) are the cylindrical cam members (4) of the drive section (40).
4) Keep that state unless you rotate it. Therefore,
The cushion body holds the driver's back and hips in a state in which the driver's spine is not burdened, and the driver can comfortably sit and drive the vehicle in the sorax support posture.

[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, a seat device 10 a according to the present embodiment includes a back frame 2 that holds a cushion body of a seat back 10.
0 is provided with a solux adjustment mechanism 30. With such a solux adjustment mechanism 30, the cushion body can be adjusted to a solux support posture (see FIGS. 5 and 6) that does not impose a burden on the spine of the driver of the vehicle. is there.

The cushion body forming the seat back 10 includes an 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 center back portion 12 is formed between the upper back portion 11 and the lower back portion 13. The cushion body is, for example, foam-molded from urethane foam or the like.

Back frame 2 for holding the cushion body
0 is the side portions 21 and 21 on both sides, and the side portions 21 and 21,
The upper part 22 connects the upper ends of the parts 21. The lower ends of the side portions 21 are connected via the reclining device 25,
It is supported at the rear end of a cushion frame 15 installed in the seat cushion 14. The headrest 50 is supported on the upper portion 22 via a pair of stay members 51, 51.

Support brackets 23, 23; 24, 24 are integrally provided at the upper and lower ends of both side portions 21, 21, respectively. An upper back support member 32, which will be described later, is pivotally attached to the pair of support brackets 23, 23 at the upper ends of the side portions 21, 21 so as to be tiltable in the front-rear direction. On the other hand, the support bracket 2 at the lower ends of both side portions 21, 21
A butt support member 34, which will be described later, is pivotally attached to 4, 4 and 24 so as to be tiltable in the front-rear direction.

Two reinforcing frame members 25 and 26 which are parallel to each other in the vertical direction are provided between the side portions 21 and 21, and further, two reinforcing frame members 25 and 26 are provided in the upper and lower parts.
A support frame member 27 for mounting the drive unit extending in the up-down direction is bridged between them at approximately the center thereof.

As shown in FIGS. 1 to 3, the soralux adjusting mechanism 30 includes a back adjusting section 31 provided on the back side of the upper back section 11, a hip adjusting section 33 provided on the back side of the lower back section 13, and a center. Drive unit 40 provided on the back side of the back unit 12
It is composed of and.

The back adjusting portion 31 has an upper back support member 32 pivotally mounted on the upper portion of the back frame 20 so as to be tiltable via a pair of support brackets 23, 23. More specifically, the upper back support member 32 is connected to the support brackets 23, 23 at both ends of the upper end thereof, and the upper portion of the back frame 20 is tilted so that the lower end portion tilts in the front-rear direction with the upper end portion as a rotation center. Such an upper back support member 32 pivotally attached to the side displaces the upper back portion 11 of the cushion body so as to bulge relatively more forward than the back surface of the center back portion 12 with the tilt thereof, and It is a thing to make it a Lux support posture. In this case, the tilting angle range of the upper back support member 32 is set so that the upper back part 11 forms the sorax support posture shown in the range A in FIG.

On the other hand, the buttocks adjuster 33 includes the back frame 2
In the lower part of 0, the hip support member 34 pivotally mounted so as to be tiltable via a pair of support brackets 24, 24 is provided. More specifically, the buttocks support member 34 is connected to the support brackets 24, 24 at both ends of its lower end, and the lower end of the back frame 20 is tilted so that the upper end tilts in the front-rear direction with the lower end as the center of rotation. Such a hip support member 34 pivotally attached, together with its tilting,
The lower back portion 13 of the cushion body is replaced with the center back portion 12
It is displaced so as to bulge relatively to the front side of the back side of the body so as to have a sorax support posture. In this case, the tilting angle range of the buttocks support member 34 is set so that the lower back portion 13 forms the sorax support posture shown in the range B in FIG.

The lower end of the upper back support member 32 and the upper end of the hip support member 34 are respectively located at the center back portion 1.
The middle back support member 35 arranged on the back side of the hinge 2 is hinged to the upper and lower ends thereof so as to be bendable. Mid-back support member 35
Is urged toward the rear support frame member 27 side by the spring member 60. As a result, the upper back support member 32 is biased rearward by the spring member 60 with the upper end thereof as the center of rotation and the lower end side is biased rearward, and the hip support member 34 also has the upper end with its lower end as the center of rotation. The part side is in a state of being biased rearward.

The drive unit 40 is supported on the upper side of the support frame member 27 so as to be movable in the front-rear direction via the holder member 28, and engages with the lower end of the upper back support member 32 from the rear side to support the upper back. 41, similarly, a buttocks support follower 42 that is movably supported in the front-rear direction on the lower side of the support frame member 27 via the holder member 28, and engages with the upper end of the buttocks support member 34 from the rear side. It has a pivot 43 fixed to extend in the front-rear direction in a state orthogonal to the frame member 27, and a cylindrical cam member 44 rotatably supported on the rear end side of the pivot 43.

On the front surface side of the cylindrical cam member 44, there is provided a peripheral edge cam surface portion 45 with which the rear end portion 41b of the upper back supporting follower 41 and the rear end portion 42b of the buttocks supporting follower 42 are respectively engaged. Has been. Rear ends 41b, 42b of the followers 41, 42
Is formed with an engagement groove that is slidably fitted on the peripheral cam surface portion 45, while the front end portion 41 of each follower 41, 42 is formed.
The a and 42a are provided with contact portions that engage with the rear surface of the upper back support member 32 or the hip support member 34 by friction.

To describe the cylindrical cam member 44 in more detail, as shown in FIG. 4, the peripheral cam surface portion 45 on the front surface side is
A pair of convex portions 45a, 45a facing each other and each convex portion 4
A pair of concave portions 45 facing each other between 5a and 45a
b and 45b are smoothly continuous on the circumference of the circle.

The pair of convex portions 45a, 45a are portions for pushing the back support follower 41 and the hip support follower 42 forward against the biasing force of the spring member 60 (FIG. 2).
), The pair of recesses 45b, 45b are provided with an upper back support follower 41 and a hip support follower 42 by the biasing force of the spring member 60.
Is a part for retracting the rear part (see FIG. 3).

On the rear surface side of the cylindrical cam member 44,
A rack portion 46 is provided along the circumference of the circle. As shown in FIG. 1, the output pinion member 48 that meshes with the rack portion 46 is pivotally supported by an attachment bracket 47 fixed to the side portion 21 of the back frame 20 via an output shaft. An adjustment knob 49 is fixedly provided at the base end of the output shaft.

Further, as shown in FIGS. 2 and 3, the soralux sensors 70, 70 are provided at the tip ends of the followers 41, 42, respectively. Thorax sensor 70
Is a sensor for detecting that the upper back part 11 and the lower back part 13 have moved to a range forming a sorax support posture by detecting the front and rear positions of the followers 41 and 42, and specifically, for example, , Limit switch can be configured.

Next, the operation will be described. As shown in Figure 1,
The driver of the vehicle operates the saw rack adjustment mechanism 30 to displace the cushion body of the seat back 10 to adjust the posture to the saw rack support posture, and the adjustment knob 4 of the drive unit 40.
By stopping the rotation of 9, the upper back support member 32 and the buttocks support member 34 are restrained from tilting and held in this state, and a stable seating feeling can be obtained without giving a strain to the spine even when sitting for a long time.

As shown in FIG. 2, before the saw lux adjustment, the upper back portion 11 held by the upper back support member 32, the center back portion 12 held by the middle back support panel 35, and the hip support member 34. The backrest surface of each of the lower back portions 13 held by is so continuous as to approach the substantially same plane.

The seat back 20 in such a normal state
In order to adjust (see FIG. 2) to the soralux support posture, the adjustment knob 49 is manually rotated to rotate the pinion member 48, and the cylindrical cam member 44 meshed with the pinion member 48. Is rotated about the axis 43.

When the cylindrical cam member 44 rotates, the upper spine supporting follower 41 and the buttocks supporting follower 42 engaged with the peripheral edge cam surface portion 45 respectively have irregularities (projections 45a on the peripheral edge cam surface portion 45). , Linear movement in the front-rear direction according to the change in the recess 45b). For example, the rotation of the cylindrical cam member 44 causes the rear end portions 41b and 42b of the followers 41 and 42 to move from the convex portion 45a (see FIG. 2) of the peripheral cam surface portion 45 to the concave portion 45b.
Each follower 4 as it moves relative to (see FIG. 3)
1, 42 linearly move rearward by the biasing force of the spring member 60.

When the followers 41 and 42 linearly move rearward in this way, in the back adjusting portion 31, the upper back support member 32 supported from the rear by the tip portion 41a of the upper back supporting follower 41, The urging force of the spring member 60 causes the tip of the support bracket 23 to tilt rearward about the center of rotation. As a result, as shown in FIG. 3, the upper back portion 11 of the cushion body is displaced so as to be relatively forward of the back position of the center back portion 12, and the upper back portion 11 is in the sorax support posture.

Also, in the buttocks adjusting portion 33, the buttocks supporting follower 4
When 2 moves linearly rearward, the hip support member 34 supported from the rear by the front end portion 42a tilts rearward about the front end of the support bracket 24 by the urging force of the spring member 6. As a result, as shown in FIG. 3, the lower back portion 13 is displaced so as to relatively move forward, and the lower back portion 13 is brought into the sorax support posture in which the hip of the driver is held from the rear. In addition, as the upper back support member 32 and the hip support member 34 are tilted rearward, the middle back support panel 35 is retracted, and the center back portion 12 held by the middle back support panel 35 is retracted relatively slightly behind. Displace.

Moreover, at this time, when the upper back portion 11 and the lower back portion 13 are moved to the positions forming the slacks support posture, the followers 41 and 42 are moved to the detection ranges of the slacks sensors 70 and 70, respectively. Since signals are output from the thorax sensors 70, 70, if an appropriate display is made to the driver or the like based on this signal, the driver or the like objectively determines that the driver is in the thorax posture. be able to. 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, the state is maintained unless the adjustment knob 49 is rotated. In such a sorax support posture, the body pressure distribution of the seated driver is appropriately dispersed, so that the driver can comfortably sit and drive. On the other hand, when the adjustment knob 49 is rotated to return to the normal state in the sorax support posture, the followers 41 and 42 engaging with the peripheral edge cam surface portion 45 gradually move forward, whereby Upper back support member 32
Then, the hip support member 34 gradually tilts forward, and the cushion body also returns to its original state.

In the above-mentioned embodiment, the above-mentioned saw-lux sensor is provided in order to ensure the adjustment to the posture of the saw-lux support, but instead of this or together with this structure, the upper surface of the apparatus is placed at a proper position. A scale or an indicator line indicating a preferable angle range of the back portion or the lower back portion may be formed.

[0042]

According to the seat device of the present invention, when the cylindrical cam member constituting the drive portion of the saw racks adjusting mechanism is rotated, the upper back portion is driven by the follower that linearly moves in the front-rear direction. Soralux support posture that does not accumulate fatigue even if the driver of the vehicle sits for a long time, because the lower back part moves forward and holds the driver's hips from the rear while displacing the person's back relatively forward Therefore, the driver can sit and drive the vehicle in a stable state without straining the spine in the sorax 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 a side view showing a seat device according to an embodiment of the present invention.

FIG. 3 is a side view showing a state in which the seat apparatus according to the embodiment of the present invention is displaced to a saw rack support posture.

FIG. 4 is a perspective view showing a cylindrical cam member of a drive unit that constitutes a seat apparatus according to an embodiment of the present invention.

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

FIG. 6 is a diagram for explaining a sorax support posture.

FIG. 7 is a diagram for explaining a state of a spine of a human body in an upright posture.

FIG. 8 is a diagram for explaining a support posture in a conventional seat device.

FIG. 9 is a diagram for explaining a support posture in a conventional seat device.

[Explanation of symbols]

 10a ... Seat device 10 ... Seat back 11 ... Upper back part 12 ... Center back part 13 ... Lower back part 20 ... Back frame 30 ... Sorlux adjusting mechanism 31 ... Back adjusting part 32 ... Upper back support member 33 ... Butt adjusting part 34 ... Buttocks support member 40 ... Driving part 41 ... Upper back support follower 42 ... Buttocks support follower 44 ... Cylindrical cam 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 an automobile, wherein a cushion body of the seat back has an upper back portion with which the upper part of the back of the driver abuts, and a driver. A lower back portion corresponding to the back of the hips and a center back portion between the upper back portion and the lower back portion, and a back frame for holding the cushion body is provided with a soralux adjusting mechanism for displacing the cushion body. The soralux adjusting mechanism includes a back adjusting section provided on the back side of the upper back section, a hip adjusting section provided on the back side of the lower back section, and a drive section, and the back adjusting section is provided with the upper back section. The upper part of the driver so that the upper part of the back of the driver is relatively forward of the back position of the back part, and at the same time, the position is set in such a position of the sorax support. In order to hold a back portion, an upper back support member is supported on the upper portion of the back frame so as to be tiltable in the front-rear direction, and the hip adjustment portion relatively moves the lower back portion when the sole back support posture is taken. In order to hold the driver's hips from the rear by displacing the hips forward, the hips have a hip support member supported in the lower portion of the back frame so as to be tiltable in the front-rear direction, and the drive unit is attached to the back frame. An upper back support follower movably supported in the front-rear direction and engaged with the upper back support member from the rear, and a back frame movably supported in the front-rear direction and engaged with the hip support member from the rear. The hip support substructure is provided with a peripheral cam surface portion rotatably supported by a back frame via a pivot extending in the front-rear direction on the back frame, and the rear end portion of each substructure is engaged. A seat apparatus comprising: a cylindrical cam member that tilts the upper back support member via a holding follower and tilts the hip support member via the buttocks support follower. .