JPH05146343A - Seat device - Google Patents

Abstract

PURPOSE:To prevent fatigue by correcting the unbalance between the left and right distributions of body pressure on a seat back generated by a change in a sitting position to keep a force received by the body under the ideal condition. CONSTITUTION:A plate 51 is embedded in a seat back 5 near the lumber to be moved back and forth, and transmitting mechanisms for moving individually the plate 51 back and forth by drive forces of motors are connected respectively to two left and right portions of the rear surface of the plate 51. Further, a plurality of body pressure sensors are disposed on the front surface side of the plate 51 to displace the plate 51 to a position in which the body pressure distribution corresponding to the detecting signals from the group of sensors is symmetrical.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet device.
This device corrects the posture by adjusting the body pressure distribution of the seatback for backrest according to the change of the posture of the seated person, and prevents fatigue.

[0002]

2. Description of the Related Art Inside a seat back of a driver's seat,
A lumbar support mechanism is provided for supporting the lumbar spine of the driver. This is because if you sit in the driver's seat in the same posture for a long time, your posture will collapse due to fatigue, and the lumbar spine will bend backwards as shown in Fig. 19, making it even easier to increase fatigue. In view of this, the mechanism is designed to reduce fatigue by preliminarily hardening the seatback near the lumbar spine and preventing the above-described bending.

As a lumbar support mechanism, for example,
The mechanism shown in FIGS. 21 to 22 has been conventionally provided. Figure 21
The mechanism shown in FIG. 22 is such that the lumbar support plate 151 is embedded at the height of the lumbar vertebra of the seated person inside the seat back 5 so as to be in close contact with the inner surface of the urethane sheet 55. Due to the pressing force of the rear torsion bar 152, the lumbar support plate 151 is displaced forward to move the urethane sheet.
This is a mechanism that compresses 55 to increase its hardness.

The torsion bar 152 has two bars, an upper bar and a lower bar, which are connected to a coil portion wound around the peripheral surface of the rod 157. The coil portion further includes a rod portion of the rod 157. Engagement portion 152a for the guide 154 is coupled near the center.
It is said that. The shaft 156 is driven by a driving force of a motor (not shown) or manually by a handle (not shown).
When the guide 154 is rotated integrally with the guide 154, the engaging portion 152a gradually rides on the taper portion (not shown) of the guide 154.
As a result, the torsion bar 152 rotates around the rod 157 and, as described above, the lumbar support plate 151.
Is displaced.

A device described in Japanese Utility Model Laid-Open No. 3-19344 has been proposed as a lumbar support mechanism different from the mechanism shown in FIGS. 21 to 22. 3-193, Kaikai
In the device described in Japanese Patent No. 44, an airbag is embedded in the seat back at the height of the lumbar vertebra of the seated person so as to be in close contact with the inner surface of the urethane sheet, and the body pressure of the seated person is adjusted according to the body pressure of the seated person. This is an apparatus for obtaining an optimum hardness by controlling the amount of air supplied to the airbag and changing the pressing force on the urethane sheet. Therefore, the actual Kaihei 3-193
In the device described in Japanese Patent No. 44, a sensor for detecting body pressure is embedded under the outer skin of the seat back.

[0006]

[Problems to be Solved by the Invention] If the driver continues to sit in the driver's seat for a long time, his or her posture may collapse due to fatigue, and the posture tends to be biased to the right or left. Therefore, the distribution of body pressure measured on the seat back surface was initially left-right symmetric as shown in FIG. 24, but gradually became left-right asymmetric as shown in FIG. Also moves upward.

As described above, when the body pressure distribution is left-right asymmetrical, the force exerted on the body from the seat back deviates from the ideal state and the body receives unreasonable force.
Fatigue increases and it takes a long time to recover. However, any of the lumbar support mechanisms described above is a mechanism that supports the lumbar spine with a uniform pressure to prevent the lumbar spine from bending backward as shown in FIG. , Cannot be adjusted according to changes in posture.

The present invention has been made in view of the above circumstances, and prevents the fatigue by adjusting the bias of the body pressure distribution due to the change of the posture during driving as needed to maintain the body pressure distribution symmetrically. In addition, the purpose is to enable comfortable driving to be continued.

[0009]

SUMMARY OF THE INVENTION The present invention is a seating seat.
A seat having a seat cushion and a seat back for backrest
In the seat device, a plate embedded inside the seatback at a height near the lumbar vertebra of a seated person so as to be displaceable in the front-rear direction along substantially the seatback surface, and the plate. Body pressure sensor groups arranged at a plurality of positions on the front side to detect the body pressure of the occupant, respectively, and are connected to the plate on the left and right of the rear surface of the plate to the front-back direction of the plate. Two sets of driving force transmission mechanisms that respectively apply a pushing and pulling force to the
Two driving motors that respectively apply a driving force to a pair of driving force transmission mechanisms according to a control signal, and the two driving motors according to a body pressure distribution of a seated person detected by the body pressure sensor group. And a control means for outputting a control signal to each of the drive motors to cause a displacement in the plate such that the body pressure distribution of the occupant becomes substantially symmetrical. In the above, the driving force transmission mechanism is constituted by two links (= X) which are rotatably connected to each other at X-shaped intersections.
The rear end of the link that supports the upper side of the plate is moved up and down along the frame of the seatback to give a push-pull force to the plate in the front-back direction. It may be configured to do so. Further, as described in claim 4, the stroke of the plate during pushing and pulling may be increased toward the lower side by devising the split ratio of the link.

[0010]

When a person sits down on the seat apparatus, the body pressure sensor group detects the body pressure distribution on the seat back surface. The control means, in order to displace the plate so that the body pressure distribution becomes bilaterally symmetric, according to the detected value, the 2
The individual drive motors are individually driven. Thus
The body pressure distribution on the seat back surface is always maintained to be substantially symmetrical, and fatigue is prevented. Further, when the plate is moved back and forth by the X-arm and the displacement amount is set to increase toward the lower side,
As the seat back is pushed more toward the bottom of the human body,
Get a more comfortable feeling.

[0011]

EXAMPLES Examples of the present invention will be described below. [1] Mechanism of Seat Device This seat device is, as shown in FIGS. 1 and 2, a seating seat.
It comprises a seat cushion 2 and a seat back 5 erected from the rear portion of the seat cushion 2.

[1-1] Seatback 5 Inside the seatback 5, a plate made of a flexible soft resin for supporting the lumbar vertebra is provided at a position near the lumbar vertebra of the seated person. = Lumber support plate) 51 is embedded, and its front surface is in close contact with the inner surface of the easily compressible urethane sheet 55. The plate 51 is provided with X-arms (two links rotatably connected at an X-shaped intersection) 61a, 61b at the left and right positions on the rear surface side. , And is supported by the frame 53 of the seat back 5, respectively, so that the plate 51 can be moved in the front-rear direction.

As shown in FIG. 3, the upper end of the X arm 61a is rotatably supported by the frame 53, while the lower end is at the center of the plate support plate 62. Is rotatably connected to the plate support plate 62. A through hole 62f, which is a connecting portion of the plate support plate 62 with the X arm 61a, has a long hole shape so that the following movements of the X arms 61a and 61b are possible. .. Also, X arm 61
The upper end of b is rotatably connected to the upper end of the plate support plate 62 to support the plate support plate 62.
On the other hand, the lower end is integrally connected to the arm support plate 65. In addition, strokes AB of the X arm 61b ("A-
B "indicates the distance between points A and B), and the division ratio (A to C) / (C to B) for dividing the intersection C of the X arm is the stroke of the X arm 61a. It is configured to be larger than the division ratio (D to C) / (C to E) of the crossing portion C of the cross sections D to E. As a result, the displacement amount of the plate 51 when pushing and pulling the plate 51 in the front-rear direction increases as it goes downward (closer to the hips), and the seated person
Get a more comfortable seating feeling.

The plate supporting plate 62 is rotatably connected to the central portions of the V-shaped connecting plates 63a and 63b by the projecting portions 62a and 62b at the upper and lower ends thereof. Connecting plate 63a, 63
b, and the front end portions of the connecting plates 63a, 63b are rotatably connected to the projecting portions 51a, 51b on the rear surface side of the plate 51 to support the plate 51. is doing. Further, the rear ends of the connecting plates 63a and 63b are coil springs.
It is connected to one end of 64a, 64b and pulled. The other ends of the coil springs 64a, 64b are connected to the projecting portions 62c, 62d near the center of the plate support plate 62.
As a result, the plate 51 is tensioned by the coil springs 64a and 64b when there is no load (when there is no seated person), and balances by pressing the pad of the seat back.
It has been stopped. Further, when a load is applied (when there is a seated person), the seat is displaced so as to adapt to the movement of the seated person, and a more comfortable seating feeling is given.

On the other hand, the arm support plate 65 is rotatably inserted and supported by a nut 66 by the two arm portions 65a, 65b on the lower end side thereof. The nut 66 is a gearbox
It is meshed with the screw 67 which is the output shaft of 68,
With the rotation of the screw 67, the screw 67 is displaced upward or downward. An unillustrated rotation speed sensor (sensors SE1, SE2, see Fig. 6) is installed near the screw 67.
As a result, the rotation speed of the screw 67 is detected and transmitted to the motor controller 207 (see FIG. 6).

The gear box 68 does not show the rotation of a wire 69 which is rotated integrally with the output shaft of a motor (not shown) (sheet back motors M1, or, M2 in FIG. 6). This is a device for converting the rotation of the screw 67 by a worm gear mechanism.

With this mechanism, the plate 51 is moved in the front-rear direction as described below. For example, when the screw 67 is rotated by the driving force of the seat back motor M1 to displace the nut 66 upward, the arm support plate 65 supported by the nut 66 is pushed upward, Along with X
The lower end of the arm 61b is displaced upward. Therefore, the X
The upper end of the arm 61b and the lower end of the X arm 61a are displaced forward to displace the plate 51 forward. At this time, X
Since the division ratios of the intersections of the arms 61a and 61b are configured as described above, the forward displacement of the lower end of the X arm 61a is the same as that of the upper end of the X arm 61b. It is larger than the amount of displacement to the front. That is, the seated person feels a more comfortable sitting feeling, as hard as the hips.

On the contrary, when the screw 67 rotates in the opposite direction to the above to displace the nut 66 downward, the nut 66 is displaced.
The arm support plate 65 supported by the X arm 61b is pulled downward, and accordingly, the lower end of the X arm 61b is displaced downward. Therefore, the upper end of the X arm 61b and the X arm 61a are
The lower end of the plate 51 is displaced rearward to displace the plate 51 rearward.

When the plate 51 is displaced evenly forward and rightward, the urethane sheet 55 is pressed from the inner surface side and compressed by the plate 51, so that the seated person has a hard seat back near the lumbar spine. I feel. The feeling is on the lower side (closer to the hips)
Big enough. On the contrary, when the plate 51 is displaced rearward evenly in the left and right directions, the compressed urethane sheet 55 is stretched by elasticity, and the seated person feels a soft seat back near the lumbar spine.

Further, when the plate 51 is displaced left and right unevenly, the body pressure distribution of the seat back by the seated person changes unevenly in place. As a result, the seated person feels a seat back feeling different from the past. "Displacement of the plate 51 unevenly on the left and right" means that when only the right side of the plate 51 is displaced forward or backward, when only the left side is displaced forward or backward, the right side is displaced forward. When the left side is displaced rearward together, the right side is displaced rearward and the left side is displaced forward, whichever is the case.
The amount of displacement increases as it approaches the tail.

The displacement of the plate 51 (uniform displacement on the left and right, and displacement on the left and right sides) is the same as that of the seat back motors M1 and M2 in the seat back body pressure sensor group SEB (described later). This is realized by controlling the drive based on the detection result and while monitoring the detection signals from the rotation speed sensors SE1, SE2. The control will be described later.

For the above control, a plurality of body pressure sensors SEB are embedded under the outer skin of the urethane sheet 55 at substantially equal intervals so as to be symmetrically arranged. The output signals of are respectively inputted to the CPU 201 (see FIG. 6). The body pressure sensor SEB is an element that outputs a voltage according to the pressing force applied by the seated person in this embodiment.

[1-2] Sheet Cushion 2 Under the inner surface of the easily compressible urethane sheet 25 of the sheet cushion 2, six springs 21, 21, ..., 21 are arranged in two rows. And the urethane sheet 25 is supported by means of a wire mesh-shaped mounting member (not shown) having a large mesh formed of thick rope.

The springs 21, 21, ..., 21 are respectively locked on a spring support plate 32 as shown in FIG. 4, and the spring support plate 32 is a pair of X arms 31a. ,
The frame of the seat cushion through 31a, 31b, 31b, etc.
It is supported by 33, which allows the spring 21,
・ ・ 21 can be moved vertically. That is,
The upper ends of the X arms 31a, 31a support the spring support plate 32, and the lower ends thereof are supported by an arm support member 34 fixed to the frame 33. The upper ends of the X arms 31b and 31b support the spring support plate 32, and the lower ends thereof are rotatably inserted and supported by nuts 36. The nut 36 is a screw which is an output shaft of the gearbox 38.
They are engaged with each other by 37 and are displaced in the axial direction of the screw 37 as the screw 37 rotates. In the vicinity of each screw 37, a rotation speed sensor (sensor SE
3 to SE8 (see FIG. 6) are provided respectively, and by this, the rotation speed of the screw 37 is detected and transmitted to the motor controller 207 (see FIG. 6).

The gear box 38 converts the rotation of the wire 39, which is rotated integrally with the output shaft of the motor M3, into the rotation of the screw 37 by a worm gear mechanism (not shown) inside. Is.

With this mechanism, the spring 21 is moved in the vertical direction as described below. For example, when the screw 37 is rotated by the driving force of the seat cushion motor M3 to displace the nut 36 diagonally upward to the right (= backward direction) in FIG. 4, the X supported by the nut 36 is moved. The lower ends of the arms 31b, 31b are also pushed in the same direction. As a result, a pair of X arms
The upper end of 31a, 31a, 31b, 31b, is pushed up,
The spring support plate 32 is displaced upward. Therefore, the spring 21 is also pushed upward.

On the contrary, the screw 37 rotates in the opposite direction to the above, and the nut 36 is moved diagonally downward to the left in FIG.
X arm 31b supported by the nut 36,
The lower end of 31b is also pulled in the same direction. As a result, the upper ends of the pair of X arms 31a, 31a, 31b, 31b are pulled down, and the spring support plate 32 is displaced downward. Therefore, the spring 21 is also pulled down.

When all of the six springs 21, 21, ..., 21 move upward uniformly, the urethane sheets 25 are pushed upward from the inner surface side by the springs 21, 21 ,. The seated person feels a hard seat cushion on his hips. On the contrary, when all six springs 21, 21, ..., 21 move downwards evenly, the compressed urethane sheet 25 expands elastically, and the seated person has a soft seat cushion on his buttocks. I feel.

If the vertical movements of the six springs 21, 21, ..., 21 are uneven and uneven, the body pressure distribution of the seat cushion by the seated person changes unevenly in place. To do. For this reason, the seated person feels a different seat cushion than before. `` 6 springs 21,21, ...
21 The vertical movement of 21 is unequal. ”
Not only when the driving amount and / or the driving direction of M8 are different from each other, but also when there is a motor which is not driven.

The movement of the springs 21, ..., 21 (equal movement, non-uniform movement) is carried out by the above-mentioned seat cushion mode.
Based on the detection results of the body pressure sensor group SEC (described later) of the seat cushion 2 and the rotation speed sensor SE3.
~ It is realized by controlling the drive while monitoring the detection signal from SE8. The control will be described later.

For the above control, a plurality of body pressure sensors SEC are embedded under the outer skin of the urethane sheet 25 at substantially equal intervals so as to be symmetrically arranged. The output signals of are respectively inputted to the CPU 201 (see FIG. 6). The body pressure sensor SEC is an element that outputs a voltage according to the pressing force of the seated person in this embodiment.

[2] Control of Sheet Device This sheet device is controlled by the CPU 201 shown in FIG. That is, the CPU 201, based on various switch inputs and various sensor inputs, signals to the motor controller 207 a signal designating the motor to be driven, and the driving direction and driving amount of the motor. When a signal designating the above is output, the motor controller 207 drives the designated motor in a designated manner in response to the signal. This allows the sea
The hardness and body pressure distribution of the bag 5 and the seat cushion 2 are controlled to optimum values.

[2-1] Outline of control circuit configuration and control The CPU 201 interacts with the occupant through the CRT screen 100, and in response to the input signal from the touch switch on the CRT screen 100, the CPU 201 The seat position and seat hardness reference values are stored and set, and the detection signals of the seat back body pressure sensor group SEB and the seat cushion body pressure sensor group SEC in various sitting postures are set. Based on, the reference value and the deviation value of the body pressure distribution of the seated person are stored.

As shown in FIG. 5, the CRT screen 100 is arranged at a position slightly ahead of the left side of the driver's seat.
It is usually used as a navigation display. However, in the case of storing the individual data of the seated person as described above, an interactive screen display is performed and the touch switch functions.

The individual data of the seated person is stored as described above, and the optimum seat position is set based on the data by a known sheet slide mechanism and a known seat reclining mechanism. When the sheet hardness is set by the mechanism of this embodiment, the CPU 201 detects the detection signals of the seat back body pressure sensor group SEB and the seat cushion body pressure sensor group SEC at predetermined intervals. The sheet hardness and the body pressure distribution are changed so that the fatigue of the seated person is most reduced.

In the above comparison, the weight of the seated person and the rate of change of the body pressure sensor group SEB, SEC are adopted as the data of the membership function of fuzzy reasoning. Also,
As a result of the above comparison, when the degree of deviation from the personal data is large, a warning display to that effect is displayed on the CRT screen 100 to prompt the seated person to take a break.

The above-mentioned sheet hardness and body pressure distribution can be changed by the motor controller 207 by a control signal from the CPU 201 (= a signal designating a motor to be driven, and -A signal that specifies the drive direction and drive amount of the
This is realized by driving and controlling the motor groups M1 to M8 in accordance with the control signal. In the drive control, the detection signals of the rotational speed detecting sensors SE1 to SE8 are used as described below.

For example, when it is desired to change the hardness of the seat back 5, the motors M1 and M2 are driven in synchronization. "Driving in synchronism" means that the motors M1 and M2 are arranged so that the rotation speeds of the two screws 67 corresponding to the left and right X arms of the plate 51 are the same. It means that the drive is controlled. For this reason, sensors SE1 and SE2 for detecting the number of rotations of the screws 67 and 67 are arranged near the screws 67 and 67, respectively.

Similarly, when it is desired to change the hardness of the seat cushion 2, the motors M3 to M8 are driven in synchronization.
Therefore, similar to the above, in the vicinity of the screws 37, ..., 37 corresponding to the motors M3 to M8, the screws 37 ,.
・ The sensors SE3 to SE8 for detecting the number of revolutions of 37 are
Each is arranged.

When it is desired to bring the body pressure distribution of the seat back 5 close to the optimum value, the motors M1 and M2 are driven in the required directions by the required amount. For example, if the body pressure on the left side is higher than the optimum value, the motor corresponding to the X arm on the left side is driven so that the left side of the plate 51 is displaced rearward. On the contrary, when the body pressure on the left side is too lower than the reference value, the motor corresponding to the X arm on the left side is driven so that the left side of the plate 51 is displaced forward. .. Similarly, when it is desired to bring the body pressure of the seat cushion 2 close to the optimum value, the motors M3 to M8 are driven in the required direction by the required amount.

Incidentally, in FIG. 6, the ROM 205 stores a program for executing the above control. The battery-backed RAM 203 is used as a work area for executing the above control program and is also used for storing personal data.

[2-2] Specific Description of Control Next, the flowcharts shown in FIGS. 7 to 12 and FIGS.
The control of this sheet apparatus will be specifically described with reference to the display example of the CRT screen 100 shown in FIG.

* Main routine, etc. FIG. 7 shows the main routine of the processing in the CPU 201.
FIG. 8 shows a timer interrupt routine which is started at a predetermined time interval according to FIG. In the CPU 201, for example, the process is started by turning on the ignition key of the vehicle, and first, the initial setting process (S11) is executed.

In the initial setting process (S11), for example, a process for adjusting the seat position and the hardness of the seat to the seated person is executed. Further, a process for storing the set data as personal data of the seated person is executed. Details of the initialization process will be described in accordance with the description of FIGS. 9 and 10.

After the completion of the initial setting process, the timer interrupt is set (S13). As a result, the timer interrupt process shown in FIG. 8 is started every predetermined time (example: 20 minutes). In the timer interrupt processing, the adjustment of the hardness / body pressure distribution of the seat back and the adjustment of the hardness / body pressure distribution of the seat cushion are controlled. For details of the timer interrupt processing, see Figure 11 and Figure 12.
Will be described in accordance with.

After setting the timer interruption, step S15,
The process of step S17 is repeatedly executed until it is detected that the ignition key is turned off. In step S15, it is checked whether or not a situation has occurred in which activation of the timer interrupt process should be prohibited. For example, when the seat device is forcibly set to the comfortable posture, it is not necessary to adjust the hardness and body pressure distribution of the seat back and the seat cushion, and therefore the timer interrupt process is started. Is prohibited. Further, step S17 is a process executed by the CPU 201 and collectively shows processes not related to the gist of the present specification. When the ignition key is turned off (S19; YES), the process is terminated after returning the seat apparatus and the like to the initial state (S21).

* Initial Setting Process FIG. 9 shows the initial setting process (S11), and FIG. 10 shows the CRT switch acceptance process executed in step S127 of FIG.

In the initial setting process, first, the memory 203 and the like are initialized, and the CRT screen 100 is set to the initial screen shown in FIG. 13 (S101). After that, in the initial screen, the standby state is maintained until any screen mode is selected (S111; NO → S113; NO → S111; NO → S113; N).
O → ...).

In the standby state, "1. If "Seat adjustment" is pressed and the seat adjustment mode is selected (S111; YES), the sheet is interactively displayed on the CRT screen 100.
A so-called sheet adjustment mode is set to adjust the seat.
(S121). Next, if the touch switch on the CRT screen 100 is operated under the setting of the sheet adjustment mode (S125; YE
S), the process (S127) corresponding to the operated switch is shown in FIG.
It is executed as shown in.

For example, when a switch for instructing data selection (switch for designating "sex", "height" and "weight" in FIG. 14) is operated (S531; YES), it is operated. The screen switch is selected and highlighted (S533).

In addition, a switch (Fig.
When the "OK" switch of 14) is operated (S501;
(YES), the process is executed based on the selected state (= highlighted data) on the screen, and then the next screen is displayed (S503). For example, the seat position is set to the optimum position and the hardness of the seat is set to the optimum value based on the "height" and "weight" data selected on the screen. A message as shown in FIG. 15 may be displayed on the CRT screen 100 during the setting operation.

When a switch for instructing the switching of the screen display (“YES” “NO” switch etc. in FIG. 16) is operated (S521; YES), the screen is switched to the instructed screen (S523). ).

A switch for instructing an operation (see FIG.
When the "Front" and "Rear" switches in 17) are operated (S
511; YES), the commanded operation is executed, and the current screen display is maintained (S513).

After the screen as shown in FIG. 18 is displayed, when the screen display is switched to, for example, "take a driving posture," the body pressure distribution is measured after a predetermined time. It is stored as a reference value of the body pressure distribution in the driving posture of the seated person. This is to correct the body pressure distribution deviating from the normal reference value when a purse or the like is placed in the hip pocket, for example. This also applies to postures other than the driving posture and is stored as a deviation value for the seated person.

In this way, when the setting on the CRT screen 100 is completed (S123; YES), the current data set by the CRT screen 100 is set as the private data of the occupant.
It is stored in the AM203, and then the sheet adjustment mode is released (S129). The setting is completed on the CRT screen 10
The touch switch may be configured to issue an instruction, or may be configured to automatically end after a predetermined time has elapsed since the last touch switch operation.

On the other hand, in the standby state described above, "1. If a mode other than “Sheet adjustment” is selected (S113; YE
S), the process corresponding to the selected mode is executed. A default value is adopted as the sheet setting data (S115).

After completion of these processes, the process is returned to the main routine. However, in the initial screen of FIG. 13 displayed after the end of these processes (S131), if another mode is selected (S133; YES), the process in the other mode is performed. Is executed in the same manner as above.

The initial setting process is performed as described above. The display of the CRT screen 100 shown in FIGS. 13 to 18 is an example, and other displays may be performed. For example, when "weight" is specified on the screen of FIG. 14, detailed weight data may be displayed, and a selection may be made from among them.

* Seatback hardness / body pressure adjustment process FIG. 11 shows a seatback hardness / body pressure adjustment process (S51) executed during the timer interrupt process.

First, the detection value of the seatback body pressure sensor group SEB is fetched (S201), and then the detection value is stored in the personal data (body pressure stored in step S129 of the initial setting process). (Reference value, deviation value) of (S203). In the comparison processing, the weight and the rate of change of the body pressure sensor group SEB are adopted as data of the membership function of fuzzy reasoning.

As a result of the above comparison, when the body pressure distribution largely deviates from the reference value (S211; YES), the CRT screen 10
At 0, a warning message to that effect is displayed (S213), prompting the seated person to take a break. The seated person may be alerted by blinking the message or outputting a voice.

As a result of the above comparison, the seatback 5
If it is determined that the hardness of the sheet is not appropriate (S221; YES), the plate 51 is displaced to set the sheet back 5 to an appropriate hardness. Drive data
Is calculated (S223) and output to the motor controller 207 (S241). The motor controller 207 is a rotation speed sensor.
While monitoring so that the detected values of SE1 and SE2 are the same,
The data M1 and M2 are synchronously driven in the direction designated by the driving data by the amount designated by the driving data. This allows, for example, the lumbar spine of a seated person to
As shown in 19, when it is inferred from the detection result of the body pressure sensor group SEB that it is excessively curved backward, the plate 51 is displaced evenly forward, and the lumbar spine of the seated person is , Figure
As in 20, it is corrected to an optimal posture that is hard to fatigue.

As a result of the above comparison, the seatback 5
If it is determined that the body pressure distribution on the left and right of
231; YES), the driving data for the motors M1 and M2 are calculated (S233) so that the plate 51 is displaced to obtain a proper body pressure distribution that is even on the left and right. -Tacon controller 20
It is output to 7 (S241). The motor controller 207 individually drives the motors M1 and M2 in the direction designated by the driving data by the amount designated by the driving data. As a result, the body pressure distribution of the occupant becomes a proper distribution that is substantially even on the left and right, and fatigue is reduced.

* Cushion hardness / body pressure adjustment process FIG. 12 shows a seat cushion hardness / body pressure adjustment process (S53) executed during the timer interrupt process. By this treatment, the hardness and body pressure distribution of the seat cushion are
It is controlled to an appropriate value, as in the case of the bag.

In this process, the detected value to be fetched is
The seat back body pressure sensor group SEB, not the seat cushion body pressure sensor group SEC, and the control symmetrical motors are the motors M3 to M8 instead of the motors M1 and M2. , The motor controller 207 uses the rotation speed sensors SE3 to SE8 instead of the rotation speed sensors SE1 and SE2, but the seat back hardness / body pressure adjustment processing (S5
Same as 1).

[3] Effects and Modifications of the Embodiment Device In the present embodiment device, the hardness and body pressure distribution of the seat back 5 and the seat cushion 2 are based on the individual data of the seated person. At a predetermined time interval, it is controlled to an optimum value at which fatigue does not easily occur. For this reason, the seated person can continue to sit for a relatively long time, and even after that, he / she will not be excessively tired.

Also, a mode for changing the setting of hardness and body pressure distribution of the seat back 5 and the seat cushion 2.
The motors M1 to M8 are arranged at some distance from the seat, and the driving force thereof is transmitted through the wires 69, 69, 39 ,. For this reason, vibration of the motor is less likely to be transmitted to the seated person, and a comfortable seating feeling is obtained.

Further, when it is inferred that the fatigue of the seated person becomes excessive because the body pressure distribution deviates greatly from the reference value, a warning message to that effect is displayed on the CRT screen 100. Since the seated person is urged to take a break, the seated person can objectively judge his / her own fatigue level and avoid driving in an overworked state.

In the above-described embodiment, the displacement of the plate 51 for changing the hardness and body pressure distribution of the seat back 5 is performed by the X-arm mechanism arranged on the left and right sides of the rear surface. There is. However, this is not limited to the X arm as long as the mechanism can displace the left and right sides of the plate 51 back and forth uniformly or individually.

In the above embodiment, the seat cushion is used.
2 changes of hardness and body pressure distribution, 6 springs,
It is realized by moving vertically evenly or individually. But,
The number of springs is not limited to six, and instead of the springs, another pressing mechanism may be configured to move up and down.

[0071]

As described above, according to the present invention, the plate embedded in the seatback at the height of the lumbar spine is supported movably back and forth at two positions on the left and right behind the seatback, and the epidermis of the seatback is subcutaneous. In order to prevent fatigue by moving the plate at any time and correcting the posture of the seated person at any time so that the detection values of the multiple body pressure sensors embedded in -The device.

According to the present invention, the body pressure distribution of the seat back is controlled so as to be substantially bilaterally symmetric even when the posture changes while sitting for a long time. Therefore, the force that the seated person receives from the seat back has a substantially ideal distribution, and even if the seated person is seated for a long time, it is less likely to be fatigued and a comfortable sitting feeling is obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a sheet device according to an embodiment.

FIG. 2 is an explanatory view of the configuration of the sheet device viewed from the lateral direction.

FIG. 3 is an explanatory view of a seat back adjusting mechanism of the seat apparatus.

FIG. 4 is an explanatory diagram of a seat cushion adjusting mechanism of the seat apparatus.

FIG. 5 is a layout explanatory diagram of a CRT that also serves as a switch of the sheet apparatus.

FIG. 6 is a block diagram showing a configuration of a control circuit of the sheet apparatus.

FIG. 7 is a flowchart showing the processing in the CPU of the control circuit.

FIG. 8 is a flowchart showing an interrupt process in the CPU of the control circuit.

9 is a flowchart showing the initial setting process of FIG.

FIG. 10 is a flowchart showing the CRT switch acceptance processing of FIG.
It's a chart.

11 is a flow chart showing hardness / body pressure adjustment processing of the seat back of FIG.

12 is a flow chart showing hardness / body pressure adjustment processing of the seat cushion of FIG.

FIG. 13 is an explanatory diagram showing a screen display example of a CRT which also serves as a switch of the sheet apparatus.

FIG. 14 is an explanatory diagram showing a screen display example of a CRT that also serves as a switch of the sheet apparatus.

FIG. 15 is an explanatory diagram showing a screen display example of a CRT which also serves as a switch of the sheet apparatus.

FIG. 16 is an explanatory diagram showing a screen display example of a CRT that also serves as a switch of the sheet apparatus.

FIG. 17 is an explanatory diagram showing a screen display example of a CRT that also serves as a switch of the sheet apparatus.

FIG. 18 is an explanatory diagram showing a screen display example of a CRT which also serves as a switch of the sheet apparatus.

FIG. 19 is an explanatory diagram showing a bad driving posture due to fatigue.

FIG. 20 is an explanatory diagram showing a good driving posture.

FIG. 21 is an explanatory view showing a conventional ramper support mechanism.

22 is a plan view of an essential part of FIG. 21. FIG.

FIG. 23 is an explanatory diagram showing an example of a bad seat back body pressure distribution.

FIG. 24 is an explanatory diagram showing a good example of the seat back body pressure distribution.

[Explanation of symbols]

2 seat cushion, 5 seat back, 21 spring, 51 plate, 25 urethane sheet, 55 urethane sheet
, 37 screw, 67 screw, 38 gear box, 68 gear box, 39 wire, 69 wire, 61a, 61b X arm, SEB body pressure sensor, SEC body pressure sensor,

Claims (4)

[Claims] 1. A seat having a seat cushion for sitting and a seat back for standing upright from a rear portion of the seat cushion.
In the seat device, a seat is installed in the seat bag at a height near the lumbar vertebra of the seated person.
A buried plate and a body for detecting the body pressure of a seated occupant, which are embedded in the back plate so as to be displaceable in the front-rear direction and at a plurality of positions on the front side of the plate A pressure sensor group, connected to the plate on the left and right of the rear surface of the plate,
Two sets of driving force transmission mechanisms that respectively apply a push-pull force to the plate in the front-back direction, and two sets of driving force transmission mechanisms according to a control signal,
Control signals are output to the two drive motors, which respectively apply the drive force, and the two drive motors according to the body pressure distribution of the occupant detected by the body pressure sensor group. A sheet device having a control means for causing the plate to undergo a displacement so that the body pressure distribution of the seated person becomes substantially bilaterally symmetric. 2. The drive motor according to claim 1, wherein the two drive motors are arranged separately from a seat cushion and a seat back, respectively. Each of the sheet devices has a wire mechanism for transmitting the rotational force of the output shaft of the corresponding drive motor. 3. The driving force transmission mechanism according to claim 1, wherein the two sets of driving force transmission mechanisms each include two links rotatably connected to each other by an X-shaped crossing portion, and a rear end of each link is The front end supports the plate while being supported by the frame of the seat back, and the rear end of the link supporting the upper side of the plate is driven by the driving force of the driving motor. A sheet device that generates a push-pull force in the front-rear direction by being moved up and down along a frame. 4. The split ratio for the crossing portion of a link that is moved up and down on the rear end side along the frame, as compared with split ratios of other links. The frame side is configured to be larger than the plate side, whereby the displacement amount of the plate in the front-rear direction due to the pushing and pulling is increased toward the lower side of the plate. -Gating device.