JPH0672200A - Seat device - Google Patents

Abstract

PURPOSE:To provide a driver with a comfortable sitting feeling hardly with fatigue even in the case of performing driving operation on the seat for many hours by providing a thorax adjusting mechanism. CONSTITUTION:A driver displaces a lower back 11 together with a seat cushion 20 by operating a thorax adjusting mechanism 40 so as to adjust it into the thorax support attitude, thus obtaining a comfortable sitting feeling on the seat for many hours. That is, when the seat cushion 20 is moved longitudinally by the thorax adjusting mechanism 40, the lower back 11 is longitudinally tilted while being put in vertical action. A seat back 10 is thereby adjusted into the thorax support attitude of holding the bottom of the drive 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 position to give a driver of a vehicle a comfortable seating feeling.

[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. From the idea that it is most comfortable to keep this posture, as shown in FIG. 7, it is common to provide the seat 1 with a lumbar support 2 that holds the back of the waist forward.
Moreover, it was believed that it was the only comfort factor.

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 there will be a so-called slipping phenomenon that you push your buttocks forward, and the back of your buttocks will be separated from the seat back, and the back of person M when standing upright will be S-shaped. According to the above-mentioned theory for keeping the above, there is a problem that the driver is not supported and becomes unstable, and the driver tends to get tired when driving for a long time and cannot drive in a comfortable state.

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, he / she is comfortable to sit and is not tired. It is an object to provide a seat device that can be obtained.

[0007]

According to the research conducted by the inventors, it is most comfortable for a driver to take a driving posture for a long period of time by curling his back and slightly shifting his buttocks forward. Verification has been obtained. That is, the feeling of sitting varies from person to person, and there is also a time factor. Even if it is comfortable at first, the comfort does not always last. Is not always comfortable and accumulates fatigue.

Then, as a result of studying what kind of posture the driver is comfortable with, as shown in the curve of the spine of the seated person in FIG. 4, when the hip point C is in the position shown in the figure, there is a range in the upper part. As shown in A, it is comfortable that the upper body is raised and the back is stooped, and in the lower part, the hips are pushed forward as shown in the range B. In this state, the person M is held as shown in FIG. It was concluded that this is the posture that is the least likely to cause fatigue, and we decided to call this state the solax support posture.

Based on the above conclusion, the gist of the present invention for achieving the above-mentioned object is a seat device capable of adjusting to a sorax support posture which gives a comfortable seating feeling to a driver of a vehicle. The lower back (11), which hits the back (10) behind the seated driver's hips,
The upper back (11) is divided into an upper back (12) which is an upper part of the back of the driver, and the lower back (11) is moved so that the lower back (11) can be moved to a position where the seat back (10) is in a sorax support posture. Connected to (12) slidably and swingably,
A lower end of the lower back (11) is swingably connected to a base end portion of a seat cushion (20) on which a driver's hips rest, and the seat cushion (20) supports the seat cushion (20). The seat back frame (32) is attached to a vehicle body so as to be movable back and forth, and the lower back (11) is displaced to a position for holding the driver's hip from behind, so that the seat back (10) is in a sorax support posture. So that the seat cushion (20)
The seat apparatus is characterized in that a sorax adjusting mechanism (40) for advancing the vehicle is provided in the seat support frame.

[0010]

Operation: The driver of the automobile is required to adjust the soralux adjustment mechanism (4
0) is operated to displace the seat cushion (20) and the lower back (11) to adjust to the sorax support posture, and a comfortable sitting feeling can be obtained even when sitting for a long time.

That is, the saw rack adjusting mechanism (40)
When the seat cushion (20) moves back and forth, the base end of the seat cushion (20) is connected to the lower end of the lower back (11), so that the lower back (11) moves in conjunction with the forward and backward movement of the seat cushion (20). Tilt back and forth while moving up and down. Therefore, in the seat back (10), only the lower back (11) corresponding to the buttocks of the driver can be moved forward to be in the sorax support posture in which the buttocks of the driver are held from the rear.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the seat device of the present embodiment is
The seat back cushion body 10 is divided into a lower back 11 that hits the back of the seated driver's hips and an upper back 12 that hits the upper rear part of the driver.
The lower back 11 is slidably and swingably connected to the upper back 12 so that the lower back 11 can move to a position where 0 is in a sorax support posture.
The lower end of the lower back 11 is swingably connected to the base end of the seat cushion 20 on which the driver's hips rest, and the seat cushion 20 is movable back and forth on the seat side rails 32, 32 (seat support frame) of the slide unit 30. The seat side rails 32 and 32 are provided with a saw rack adjusting mechanism 40 that is mounted and supported on the seat cushion 20 and that displaces the lower back 11 together with the seat cushion 20.

As shown in FIG. 1, the upper back 12 constituting the seat back 10 has a gate shape, and the leg portions on the lower sides of both sides are connected to the seat side rails 32, 32 via the arm members 13, 13. It is fixed. Back guide grooves 14 are formed on both inner side surfaces of the upper back 12 in the longitudinal direction of the seat back 10. The upper back 12 is not limited to being fixed to the seat-side rails 32, 32, but may be a seat-side rail 3 via a so-called reclining device (a known one can be used).
The tilt may be adjustable by being supported by 2, 32. Further, it is preferable that the inclination of the upper back 12 is set so as to form the above-mentioned sorax support posture.

Lower back 1 constituting seat back 10
Reference numeral 1 denotes a shape and dimension that slidably fits inside the lower portion of the upper back 12, and by fitting back guide pins 15 formed on both side surfaces into the back guide groove 14, The upper back 12 is movably and swingably mounted. Further, the lower back of the lower back 11 is connected to the base end of the seat cushion 20 by hinges 16 and 16.

The seat cushion 20 has cushion guide pins 21 and 21 formed on the base end sides (rear side) of both side faces, and mounting nuts 22 and 2 on both sides of the front end side (front side) lower face.
2 is fixed. This seat cushion 20
The cushion guide pins 21 and 21 are fitted in the cushion guide grooves 33 and 33 formed in the front-rear direction on the rear inner surfaces of the seat side rails 32 and 32 so that the cushion guide pins 21 and 21 can be moved back and forth and can be swung. Rails 32, 32
Installed on. In the case of the present embodiment, the seat cushion 20 includes the cushion guide pins 21 and 21.
Is supported by the seat side rails 32, 32 engaged with the seat side rails 32, 32 and the lower support by a connecting link 46 described later.

The slide unit 30 includes vehicle body side rails 31 and 31 fixed to the floor of the vehicle body, and seat side rails 32 and 3 mounted on the vehicle body side rail so as to be movable back and forth.
It consists of 2. Seat side rails 32, 32
Is an inverted T-shaped section having a horizontal plate-shaped portion and a vertical plate-shaped portion, and the horizontal plate-shaped portion is fitted into the vehicle-body-side rails 31, 31 to be movable back and forth. The above-mentioned cushion guide grooves 33, 33 are formed in the shaped portion. The above-mentioned arm members 13, 13 are also fixed to this vertical plate-shaped portion.

The saw rack adjusting mechanism 40 includes an operating shaft 41.
, The brake unit 42, and the pinion gear 43 (see FIG.
(Shown in FIG. 3), a sector gear 44, a drive shaft 45, connecting links 46, 46, and a saw rack sensor 47,
In some cases, a motor or the like (not shown) for driving the operation shaft 41 is provided.

Both ends of the drive shaft 45 are seat side rails 3
By being pivotally supported by the vertical plate portions 2 and 32, the seat cushion 20 is rotatably provided laterally below the front portion of the seat cushion 20.

The brake unit 42 is provided with the drive shaft 4 at the vertical plate portions of the seat side rails 32, 32 on one side.
5 is provided at a position adjacent to the pivotal support. The output shaft of the brake unit 42 is the seat side rail 3
The pinion gear 43 is fixedly provided on the output shaft as shown in FIG.

The operation shaft 41 is a brake unit 42.
Is arranged on the axis line of and forms the input shaft of the brake unit 42. (That is, the operation shaft 41 is connected to the pinion gear 43 via the brake unit 42.)
The brake unit 42 prevents the pinion gear 43 from rotating unless the operating shaft 41 rotates, and
When 1 rotates, this rotation is transmitted to the pinion gear 43. Specifically, a known structure of a so-called rocking coil type can be used.

The sector gear 44 is fixed to the drive shaft 45 at a position adjacent to the pinion gear 43, has a sector shape as a whole, and has teeth of a predetermined angle meshing with the pinion gear 43 formed in an arc-shaped portion. There is.

The connecting links 46, 46 are formed so as to extend radially from two positions on both sides of the drive shaft 45.
The tip of the seat cushion is fixed to the lower surface of the front portion of the seat cushion 20 via the mounting member 47 and the mounting nut 22 described above, and swings as the drive shaft 45 rotates (that is, the swing of the sector gear 44), and the seat cushion. 20 is moved back and forth.

The solux sensor 47 is a sensor which is attached to the seat side rail 32 and detects that the lower back 11 has moved to a range forming a solux support posture by detecting the swing position of the sector gear 44. Specifically, it is a so-called limit switch.

The movable range of the sector gear 44 (that is, the number of teeth of the sector gear 44) and the connecting links 46, 46.
With respect to the phase relationship and the like between the sector gear 44 and the sector gear 44, the swing of the sector gear 44 causes the lower back 1 together with the seat cushion 20.
1 is moved, the lower back 11 is moved to the upper back 12
It is set so that it can be moved from a state in which it is entirely fitted in the inside to a position and an angle forming the saw-lux support posture shown in FIG.

Next, the operation will be described. Car drivers
Operate the Sollux adjustment mechanism 40 to move the seat cushion 2
The lower back 11 is displaced together with 0 to adjust to the desired soles support posture, and a comfortable sitting feeling can be obtained even when sitting for a long time.

That is, when the operation shaft 41 of the saw rack adjusting mechanism 40 is rotated by the driver's operation and the drive shaft 45 is rotated, the connecting links 46, 46 swing and the seat cushion 20 moves back and forth. Then, the seat cushion 20
Since the base end of is connected to the lower end of the lower back 11,
The lower back 11 tilts back and forth while moving up and down in conjunction with the forward and backward movement of the seat cushion 20.

Since the moving posture of the lower back 11 is set as described above, the lower back 11 is tilted and moved forward as shown by a chain line in FIG. 3 to hold the driver's hip from the rear in a sorax support posture. Can be Moreover, at this time, when the lower back 11 is moved to a position forming the slacks support posture, the sector gear 44 is moved to the detection range of the slacks sensor 47 as shown by the chain line in FIG. Since it is output, the driver or the like can objectively determine that the driver or the like is in the sorax posture by making an appropriate display to the driver or the like based on this signal. Therefore, a problem that the driver is not adjusted to the sorax support posture due to unfamiliarity, illusion, etc. is eliminated, and the soracus support posture is surely adjusted.

Then, this attitude of supporting the saw rack is maintained by the action of the above-mentioned brake unit 42 unless the operating shaft 41 is operated again.

In the above-mentioned embodiment, the above-mentioned saw-lux sensor 47 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 appropriate position on the surface of the device ( For example, the arm member 13) may be formed with a scale or an indicating line indicating a preferable angle range of the lower back 11.

[0030]

According to the seat device of the present invention, the driver of the vehicle can tilt the lower back, which is the lower portion of the seat back, forward by the saw racks adjusting mechanism. You can adjust the posture and get a comfortable sitting feeling even if you sit for a long time.

[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 diagram showing a pinion gear and a sector gear in the saw-lux adjusting mechanism according to the embodiment of the present invention.

FIG. 3 is a side view showing the operation 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 a diagram for explaining a sorax support posture.

FIG. 6 is a diagram for explaining the state of the spine of the human body in the upright posture.

FIG. 7 is a diagram for explaining a support posture in a conventional seat device.

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

[Explanation of symbols]

 10 ... Seat back 11 ... Lower back 12 ... Upper back 20 ... Seat cushion 32 ... Seat support frame (seat side rail) 40 ... Sollux adjustment mechanism

Claims (1)

[Claims] 1. A seat device capable of adjusting to a sorax support posture for giving a comfortable seating feeling to a driver of a vehicle, wherein a cushion body of a seatback hits a lower back behind a hip of a seated driver, and driving. Divided into an upper back that hits the upper back of the person, so that the lower back can be moved to a position where the seat back is in a sorax support posture, the lower back is slidably and swingably connected to the upper back, A lower end of the lower back is swingably connected to a base end portion of a seat cushion on which a driver's hip rests, and the seat cushion is movable back and forth on a seat support frame attached to a vehicle body to support the seat cushion. When the seat back is installed, the lower back is displaced to a position that holds the driver's hip from behind. A seat device, wherein a sorax adjusting mechanism for advancing the seat cushion is provided on the seat support frame so that the seat cushion has a soralux support posture.