JPH05168545A - Lumbar support control of power seat and control of power seat motor - Google Patents

Abstract

PURPOSE:To reduce fatigue of a sitting person, by optionally selecting either a burst control reciprocating a lumbar plate back and forth periodically or a fluctuation control moving it back and forth non-periodically. CONSTITUTION:Two kinds of automatic controls in addition to a manual control of a lumbar plate 28 can be selected, which are a burst control nearly periodically moving the lumbar plate 28 back and forth and a fluctuation control non-periodically moving it back and forth. In the fluctuation control, 1/f fluctuation waveform for instance has a non-periodical change which can be obtained by combining waveforms by fourier series. Moreover, for example, a time table is made from the amplitude and variation time obtained from a pseudo- fluctuation waveform corrected by removing minute frequency varying components and period varying component, which is difficult for the motor M5 to eliminate from 1/f fluctuation waveform. The motor M5 is controlled under the drive power and drive time expressed numerically for every step.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power seat which adjusts the front and rear positions of a lumbar plate by controlling the drive of a motor to support the lumbar spine of a seated person and reduce fatigue under a desired lumbar spine supporting force. LUMBER SUPPORT CONTROL METHOD AND POWER SEAT MOTOR CONTROL DEVICE.

[0002]

2. Description of the Related Art For example, a lumbar support device provided on a seat back of a vehicle seat for supporting a lumbar vertebra of a seated person under an appropriate supporting force to stabilize a sitting posture and reduce fatigue. It has been known.

The lumbar support device is provided with, for example, a lumbar plate for supporting the lumbar vertebra of a seated person, and the pushing force from the lumbar plate acts on the lumbar vertebra of the seated person as a lumbar spine supporting force.

In such a lumbar support device, a so-called power lumbar support is known, which is capable of adjusting the anterior-posterior position of the lumbar plate, that is, the lumbar support force from the lumbar plate, by driving control of a motor. The drive control of the motor is usually performed by operating a switch, and the switch is arranged at a position where it can be operated in a sitting posture during traveling, for example.

According to such a power lumbar support, by the drive control of the motor accompanying the switch operation,
The lumbar support force from the lumbar plate can be arbitrarily adjusted according to the body shape and taste of the seated person, the degree of fatigue, etc., and fatigue due to driving can be reduced.

[0006]

Incidentally, the shape of the spine column which causes the least fatigue during sitting is said to be an inverted S shape from various studies. The collapse of the spinal column shape from the inverted S shape is considered to be a major factor that causes a seated person to feel fatigue, and the mechanism of the occurrence is that the muscle balance is lost, that is, muscle fatigue. It is said.

Therefore, in the known construction, the lumbar support force from the lumbar plate is adjusted so as to maintain the inverted S-shape of the spine, thereby reducing fatigue of the seated person.

However, when operating for a long time, etc.,
Since the muscles tend to fatigue with the passage of driving time, the accumulation of fatigue due to the collapse of the inverted S-shaped spine column is unavoidable.

In the known construction, the resting lumbar plate merely presses the lumbar vertebra of the seated person under a constant lumbar support force, so that muscle fatigue is reduced, that is, The inverted S shape of the spinal column cannot be sufficiently maintained.

It is an object of the present invention to provide a lumbar support control method for a power seat and a motor control device for the power seat, which can reduce fatigue of a seated person when sitting down by sufficiently suppressing the accumulation of fatigue in the lumbar spine. I am trying.

[0011]

To achieve this object, according to the lumbar support control method for a power seat of the present invention, in addition to the manual control of the lumbar plate, the lumbar plate is moved back and forth substantially periodically. At least two types of automatic control, that is, burst control and fluctuation control in which the movement is performed aperiodically back and forth, can be arbitrarily selected.

When the burst control is selected, the front and rear motors are driven and controlled almost periodically with a specific stop and hold time, and the lumbar plate is adjusted to an arbitrarily adjusted initial position and a predetermined position. Between the rear position and the back position, the switch is repeatedly moved in the front-rear direction for a predetermined period of time after a predetermined switch operation. Also, when fluctuation control is selected, the front-back motor is aperiodic under the drive amount and drive amount corresponding to the frequency component, period component of the 1 / f fluctuation waveform created by waveform synthesis using the Fourier series. The lumbar plate is repeatedly moved aperiodically in the front-rear direction within the front-rear movement range for a predetermined time after a predetermined switch operation.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the power seat motor control device 10 according to the present invention includes an operation switch 12.
And a central processing unit 14, and the respective motors M1 to M5 can be drive-controlled by a predetermined switch operation.

Normally, DC geared motors can be used as the motors M1 to M5, respectively. As shown in FIG. 1, the motors M1 to M5 include a seating posture control device mounted on a power seat (for example, a driver seat) 16, such as a seat slide device 18, a seat lifter 20, a reclining device 22, and a lumbar support. Device 24 up-and-down mechanism,
Each is provided as a drive source for the front-rear mechanism.

Then, the motors M1 to M5 are driven and controlled, and the corresponding seating posture control devices are operated, whereby the front and rear positions of the seat 16, the overall tilt angle (tilt angle) of the seat, and the tilt of the seat back 26 are set. The angle (reclining angle), the vertical position of the lumbar plate 28, the front-back position, etc. can be adjusted.

The configurations of the seat slide device 18, the seat lifter 20, the reclining device 22, and the lumbar support device 24 are well known, and the configurations themselves are not the gist of the present invention, and therefore will not be described in detail.

Here, as can be seen from FIG. 2, for example, the motors M1 to M4 except the front and rear motors M5 of the lumbar support device 24 are motor control relays RL1 to RL8 described later.
Via relay contacts RL1a to RL8a, respectively, to a power source, for example, an automobile battery (BATT). And the relay contacts corresponding to the motor control relays RL1 to RL8
By switching RL1a to RL8a, the corresponding motors M1 to M4 are driven and controlled, respectively, and the front and rear position of the seat 16, the tilt angle, the reclining angle of the seat back 26, and the vertical position of the lumbar plate 28 can be adjusted respectively. There is.

As shown in FIG. 2, the winding terminals of the motors M1 to M5 are connected to the battery of the automobile, for example, via limit switches LS1 to LS8. As the limit switches LS1 to LS8, for example, push-off switches of the automatic reset type can be used, and each limit switch corresponds to the corresponding movable member, that is, the seat 1
6, the seat back 26 and the lumbar plate 28 are arranged at positions corresponding to the movement limit positions.

Such limit switches LS1 to LS8
Is normally in the on state, and the corresponding motors M1 to M1 are driven by the off operation accompanying the arrival of the movable member at the movement limit position.
It is configured so that the voltage applied from the battery to M4 can be individually shut off to immediately stop the corresponding motor.

In such a configuration, the limit switch LS
1 to LS8 can surely limit the moving range of the movable member, that is, the seat 16, the seat back 26, and the lumbar plate 28, and the motors M1 to M4 at the movement limit position
The restraint of is prevented. Therefore, the movable member and its peripheral members can be prevented from being damaged or damaged, and the motors M1 to M4 can be prevented from being overheated or damaged due to the restraint, so that the safety is ensured.

As can be seen from FIGS. 1 and 2,
The front and rear motors M5 of the lumbar support device 24 include individual switching means 30a and 30b respectively connected to the winding terminals.
Are connected to the battery and the central processing unit 14 via a drive circuit 30 having The switching means 30a, 30b of the drive circuit are configured so that they can be turned on and off under the control signal from the central processing unit 14 by combining elements such as transistors.

The motors M1 to M5 are configured to be drive-controllable by, for example, the switch means 12.
As shown in FIG. 2, the switch means 12 is formed, for example, with a series of manual switches 32 to 40 for individually manually controlling the motors M1 to M5.

As the manual switches 32 to 40, for example, seesaw switches and slide switches of automatic return type can be used, and each switch is a slide switch 32 corresponding to the motors M1 to M5, a lifter switch 34, and a reclining switch. 36, a lumbar up / down switch 38, and a lumbar front / rear switch 40, respectively. The manual switches 32-40 are connected to the central processing unit 14, respectively.

As shown in FIG. 1, the switch means 12
Is provided at a position operable by a seated person, for example, on the side of the seat cushion 42 of the seat 16 or the like. However, the switch means 12 is not limited to the side of the seat cushion 42, as long as it can be operated by a seated person, and the switch means 12 may be provided at another position, such as a console box.

The central processing unit 14 is formed of a microcomputer (microcomputer) 44, which is capable of processing an input according to a stored program and generating an appropriate control signal. The control signal is output to, for example, the relay driver 46 and the drive circuit 30, as can be seen from FIGS. 1 and 2, for example.

A relay driver corresponding to the control signal
By the operation of 46, the energization / de-energization of an appropriate one of the motor control relays RL1 to RL8 is controlled, and the energized relay of the motor control relays corresponds to the corresponding relay contact.
By switching RL1a to RL8a respectively, the motor M1 to
Each M4 is drive-controlled. Further, when the control signal corresponding to the drive circuit 30 is output, the switching means 30
The motor M5 is drive-controlled by the on / off operation of a and 30b.

For example, when the slide switch (manual switch) 32 is operated at any seat position, a corresponding signal is output to the central processing unit 14. Then, the control signal processed by the central processing unit 14 is output to the relay driver 46, and the signal from the relay driver is used to, for example, the motor control relay.
Either RL1 or RL2 is energized and the corresponding relay contact RL
1a, RL2a can be switched. And relay contacts RL1a, RL2
By switching a, the motor M1 is driven in the corresponding direction, the seat 16 moves in the front-back direction, and the front-back position of the seat is adjusted.

Here, the seat 16 is moved forward by the forward rotation of the motor M1 associated with the switching of the relay contact RL1a, and the seat is retracted by the reverse rotation of the motor M1 associated with the switching of the relay contact RL2a. ing.

Also, when the lifter switch 34 and the reclining switch 36 (both manual switches) are operated, the corresponding signals are output to the central processing unit 14 and the processed control signals are relayed in the same manner as described above. It is output to the driver 46. Then, according to the signal from the relay driver 46, for example, the motor control relays RL3 to R
One of L6 is energized and the corresponding relay contact RL3a-R
By switching L6a, the motors M2 and M3 rotate normally and reversely, and the tilt angle of the seat and the reclining angle of the seatback are adjusted by swinging the seat 16 and the seatback in the front-rear direction.

Similarly, when the lumbar up / down switch (manual switch) 38 is operated, the control signal from the central processing unit 14 is output to the relay driver 46, and the signal from the relay driver causes the motor control relay RL7, Either RL8 is activated. Then, by switching the relay contacts RL7a, RL8a corresponding to the motor control relays RL7, RL8, the motor M4 rotates normally and reversely, and the vertical position of the lumbar plate is adjusted by moving (elevating) the lumbar plate 28 in the vertical direction. To be done.

Further, when the lumbar front / rear switch (manual switch) 40 is operated, a corresponding signal is output to the central processing unit 14, and the processed control signal is output to the drive circuit 30. Then, according to the output control signal, one of the switching means 30a, 30b of the drive circuit is turned on, and the motor M5 is normally or reversely rotated by the turning on of the switching means, so that the lumbar plate in the front-rear direction is rotated. The movement of 28 adjusts the front and rear positions of the lumbar plate.

As can be seen from FIGS. 1 and 2,
The central processing unit 14 is, for example, connected to the battery via a regulated power supply 48 and is operable under an input current which is regulated by the regulated power supply.

The forward / backward movement range of the lumbar plate 28 is limited by the limit switches LS9 and LS10. As the limit switches LS9 and LS10, for example, automatic reset push-off switches can be used, and the limit switches are respectively connected to the central processing unit 14 as shown in FIG.

The limit switches LS9 and LS10 are, for example,
The lumbar plate 28 is arranged so as to be able to detect each of the front and rear positions. Then, by the OFF signal from the limit switches LS9, LS10, the central processing unit
14 is the lumbar plate to each position of the front and the end
It is configured to recognize the arrival of 28 and immediately stop the motor M5.

The motor control device 10 of the present invention is further provided with position detecting means 50 capable of detecting the front-back position of the lumbar plate 28. As the position detecting means 50, for example, a variable resistor called a potentiometer can be used, and the potentiometer is configured so that its resistance value changes as the movable end 50b moves relative to the fixed end 50a, as shown in FIG. .. Movable end 50b of potentiometer (position detection means)
Is provided so as to be movable with respect to the fixed end 50a in accordance with the driving of the motor M5, that is, the movement of the lumbar plate 28 in the front-rear direction, and is electrically connected to the central processing unit 14.

In the potentiometer 50 having such a configuration, the detected value fluctuates corresponding to the forward and backward movement of the lumbar plate 28, and the detected value is the drive amount of the motor M5 from the reference point, that is, the moving distance of the lumber plate. By converting to, the position of the lumber plate can be recognized. The movement distance of the lumbar plate 28 is converted, for example, using the final movement position as a reference point.

Although the position detecting means 50 is embodied as a potentiometer, it does not include a lumber plate.
Since it is sufficient if the front and rear positions of 28 can be detected, the present invention is not limited to this, and the position detection means is configured by other means, for example, a rotation sensor or the like that can detect the front and rear positions of the lumbar plate from the rotation speed of the motor. May be.

By the way, according to the motor control device 10 of the present invention, in addition to the conventional manual control called a so-called static support, the burst control for moving the lumbar plate back and forth substantially periodically and the back and forth aperiodically. There are two types of automatic control: moving fluctuation control.
It can be arbitrarily selected.

As shown in FIG. 3, in the burst control, the position (initial position) before the execution of the burst control, which is arbitrarily adjusted by the manual control of the motor M5.
Ls is read in the central processing unit as the movement limit position. And the motor by the drive circuit 30
By controlling the on / off of the M5, the lumbar plate 28
It is repeatedly moved in the front-rear direction between the initial position Ls and, for example, the movement limit position Lr, and the burst control of the lumbar plate is executed for a predetermined time.

In such a configuration, the lumbar plate 28
The initial position Ls becomes the pressing position for pressing the lumbar vertebra of the seated person. That is, according to such burst control, the lumbar spine of the seated person is repeatedly pressed by the periodic return of the lumbar plate 28 to the initial position (pressing position) Ls.

The burst control is executed by operating the burst switch 52 connected to the central processing unit 14, for example. As shown in FIG. 2, as the burst switch 52, for example, an automatic reset type push switch can be used, and the burst switch is formed as a part of the switch means 12.

A burst display means for displaying the execution of the burst control of the lumbar support 28 and notifying the seated person or the like.
54 is provided in the motor control device 10. As the burst display means 54, for example, a light emitting diode (LED) can be used, and as shown in FIGS. 1 and 2, the burst display means is connected to the central processing unit 14. The burst display means (LED) 54 is configured to light up or blink, for example, from the operation of the burst switch to the end of one stroke of the burst control of the lumbar plate 28.

In such a structure, the burst display means 54
Since it is clarified that the operation of the lumbar plate 28 in the burst control is being executed, the execution period of one stroke of the burst control can be easily recognized, and the erroneous operation during the burst control and the illusion of a seated person can be sufficiently prevented. it can.

The burst control execution period, that is,
The set time T for one stroke of the burst control is set, for example, as 60 seconds as shown in FIG.

In the present invention, the lumbar plate 28 is automatically returned to the position corresponding to the initial position Ls after the end of one stroke of the burst control. For example, as shown in FIG.
When one stroke of the burst control is completed at the final position Lr of the lumbar plate 28, the lumbar plate is moved forward by the drive control of the motor M5 to the initial position Lr.
It is returned to the position corresponding to s.

With such a configuration, the lumbar plate 28
Since the position is automatically returned to the initial position Ls, it is possible to surely prevent the posture of the occupant from collapsing after the burst control is executed, and the position setting operation of the lumbar plate is not complicated.

Here, in the present invention, the stop holding time Tn in the burst control can be selected by the switching operation of the select switch 56. As shown in FIG. 2, as the select switch 56, for example, a dip rotary switch that can output a predetermined code signal depending on the positions of the movable contacts with respect to the plurality of fixed contacts can be used. As can be seen from Table 1, the select switch 56 is formed to have, for example, 10 select positions, and the predetermined stop holding time Tn is selected by the code signal output corresponding to each select position. Is configured.

[0049]

[Table 1]

As can be seen from Table 1, the stop holding time Tn of the selected position of the select switch 56 is set at equal intervals, for example, 0.3 sec to 3.0 sec.

The fluctuation control of the lumbar plate 28 can be ensured by the drive control of the motor M5 based on a so-called 1 / f fluctuation waveform. The 1 / f fluctuation waveform is a waveform having an aperiodic change obtained by, for example, waveform synthesis using a Fourier series, and the Fourier series of the 1 / f fluctuation waveform is given by the mathematical expression shown in Formula 1.

[0052]

[Equation 1]

Then, by such a Fourier series,
For example, a 1 / f fluctuation waveform as shown in FIG. 4 is obtained. Note that the waveform shown in FIG. 4 is an example of a 1 / f fluctuation waveform obtained by a Fourier series, and is not limited to this waveform.

By the way, such a 1 / f fluctuation waveform is
As shown in FIG. 4, since the waveform has a minute frequency fluctuation component, a periodic component, etc., if the drive control of the motor M5 is attempted based on the obtained waveform, the control of the motor becomes high speed. The front and rear mechanisms of the motor M5 and the lumbar support device 24 cannot be easily supported.

Therefore, in the present invention, a pseudo fluctuation waveform is formed by removing from the 1 / f fluctuation waveform, for example, a minute frequency fluctuation component and a cycle fluctuation component, which are difficult to handle for driving the motor M5, and a pseudo fluctuation waveform is formed. Timetables shown in Tables 2 and 3 are created from the amplitude and the change time obtained from the waveform. Then, the motor M5 is drive-controlled based on the drive amount and drive time expressed numerically for each step of the time table, and as shown in FIG. 5, according to the drive direction and drive amount at each step, The motor control device 10 of the present invention is configured to move the plate 28 in the front-rear direction.

[0056]

[Table 2]

[0057]

[Table 3]

As can be seen from Tables 2 and 3 and FIG. 5, one cycle of the pseudo fluctuation waveform, that is, one stroke of the fluctuation control of the lumber plate 28 based on the pseudo fluctuation waveform, starts from step 0, for example. It is subdivided into steps 81.

The elapsed time Tn in each step of the time tables of Tables 2 and 3 indicates the accumulated time from step 0, and the position Ln is, for example, from the movement end position associated with the driving of the motor M5. The position of the lumbar plate 28 is shown.

Here, as shown in the schematic operation diagram of the motor M5 shown in FIG. 6, since the motor M5 is drive-controlled by the on / off operation of the drive circuit 30, the on / off switching point of the motor M5, that is, the lumber At the inflection point of the plate 28, the continuity of the lumbar plate may be impaired. Therefore, in this configuration, for example, an elastic member (not shown) of a spring system is inserted into the front-rear mechanism of the lumbar support device 24, and the lumber plate 28 is moved to the lumber plate 28 as shown in the schematic operation diagram of the lumbar plate 28 shown in FIG. It is configured to give a sense of continuity in the forward and backward movement.

With such a configuration, even at the on / off switching point of the motor M5, that is, at the inflection point of the lumbar plate 28, the lumbar plate moves elastically so as to draw a curve without stopping. It is possible to obtain a feeling of continuity in the movement of, and to give a seated person no discomfort or discomfort.

The fluctuation control of the lumbar plate 28 based on the 1 / f fluctuation waveform is executed by operating the corresponding fluctuation switch 58 connected to the central processing unit 14, for example. As shown in Figure 2, the fluctuation switch
As the 58, for example, an automatic reset type push switch can be used, and the fluctuation switch is formed as a part of the switch means 12 like the burst switch 52 and the like.

Further, the fluctuation display means 60 for displaying the execution of the fluctuation operation of the lumbar support 28 and notifying the seated person etc.
Are provided in the motor control device 10. As the fluctuation display means 60, for example, a light emitting diode (LED) can be used, and as shown in FIGS. 1 and 2, the fluctuation display means is connected to the central processing unit 14. Fluctuation display means (LED) 6
For example, 0 is lit or blinks from the operation of the fluctuation switch 58 to the end of one fluctuation control stroke.

The fluctuation display means 60 may be formed of, for example, a light emitting diode of a color different from that of the burst display means so as to be clearly distinguished from the burst display means 54.

In such a configuration, since the display of the fluctuation display means 60 makes it clear that the fluctuation control of the lumber plate 28 is being executed, the execution period of one step of the fluctuation control can be easily recognized and the fluctuation control can be performed. It is possible to sufficiently prevent the erroneous operation of, the illusion of a seated person, and the like.

Further, in the motor control device 10 of the present invention, the lumbar plate 28 when the fluctuation switch 58 is operated.
The front and rear positions of are stored as the initial position Ls of the lumber plate. Then, as shown in FIG. 5, after the fluctuation control of the lumbar plate 28 is executed, the motor is
The motor control device 10 is configured to automatically return the lumbar plate to a position corresponding to the initial position Ls by the drive control of M5.

In such a configuration, the lumbar plate 28
The initial position Ls of is stored by the detected value from the potentiometer 50. After the fluctuation control is executed, the forward / backward movement amount of the lumber plate is calculated by comparing the current position Ln of the lumbar plate 28 with the initial position Ls, and the lumbar plate is moved to the initial position by the driving amount of the motor M5 corresponding to the distance. Is returned to the position equivalent to.

Further, in the present invention, the elapsed time for each step of the time table and the drive amount of the motor M5 are varied according to the initial position Ls of the lumbar plate 28. The elapsed time for each step and the drive amount of the motor M5 are respectively corrected based on, for example, the correction coefficient K, and the correction coefficient K is the ratio of the position from the movement end position serving as the reference point in the front-back movement range. Is expressed as.

For example, if the position before the movement from the reference point is Lf and the initial position is Ls, the correction coefficient K
Is calculated by Ls / Lf. That is, the correction coefficient K becomes large at a position close to the pre-movement limit position, and becomes small at a position close to the post-movement limit position.

Then, the correction coefficient K calculated in this way
Since the elapsed time and the drive amount of the motor M5 are calculated according to the initial position Ls, the elapsed time and the magnitude of the drive amount of the motor M5 are proportional to the initial position of the lumbar plate 28. Therefore, from any initial position of the lumbar plate 28, the fluctuation motion that does not give the seated person an uncomfortable feeling can be sufficiently secured under the similarity with the fluctuation waveform.

Referring to the operation diagrams of FIGS. 3 and 5 and the time tables of Tables 2 and 3, the lumbar support control method in the burst control and the fluctuation control in the power seat motor control device 10 as described above will be described. The burst control routine shown in FIGS. 7 to 9 and the fluctuation control routine shown in FIGS. 10 to 13 will be described in detail.

For example, first, as shown in FIG. 7, when the burst switch 52 is turned on and the burst control of the lumbar plate 28 is selected (102), the burst display means 54 is turned on and the execution of the burst control is displayed. Will be done (104). At this time, the current position L of the lumbar plate 28
s is detected and stored as an initial position, that is, a pressed position (106), and a timer T that measures and regulates the time of one stroke of burst control is reset and then started (108) (see FIG. 3). ).

Then, the stop hold time tn selected by the select switch 56 is read in the central processing unit (110), and the lumbar plate 28 moves backward with the reverse rotation of the motor M5 (112).

Then, first, it is determined whether or not the current position L of the lumbar plate 28 reaches, for example, the final position Lr of the front-rear movement range (114), and it is determined NO until the final position is reached. Thus, the motor M5 is continuously driven. Then, the lumbar plate 28 reaches the final position Lr, and if YES is determined in (114), the motor M5 is stopped (116). Then, as shown in FIG.
As can be seen, the hold timer then starts (118) and the lumbar plate is held in the end position (see Figure 3).

Next, it is judged whether or not the measurement time Tn of the holding timer has passed the preselected stop holding time tn (120), and it is judged NO until the stop holding time has passed, and it continues. Is measured. Then, the measurement time Tn of the hold timer has passed the stop hold time tn, and at (120),
If YES is determined, the holding timer is reset (122) and the time lag of 0.2 sec is set (124).
The forward rotation of the motor M5 advances the lumbar plate (126).

Then, it is judged whether or not the current position L of the lumbar plate 28 reaches the pressing position Ls (126), and it is judged NO until the pressing position Ls is reached, and the motor M5 continues. And be driven. When the lumbar plate 28 reaches the pressing position Ls and YES is determined in (128), the motor
When the M5 stops, the lumbar plate stops at the pressing position (130) and the hold timer starts.
(132).

Next, it is judged whether or not the hold timer measurement time Tn has passed the stop hold time tn (134). When the hold timer measured time Tn has passed the stop hold time tn,
At (134), YES is determined, and the holding timer is reset as shown in FIG.
A time lag of 2 seconds is set (138).

Then, the measured time T of the timer is 60.
It is determined whether sec has passed (140). However, until the measured time T of the timer reaches 60 seconds, it is judged as NO here, and is returned to (110) in FIG.
(110) to (116), (118) to (134) in FIG. 8, and FIG.
By the drive control of the motor M5 along (136) to (138), the lumbar plate 28 is repeatedly moved in the front-rear direction between the pressing position Ls and the final position Lr.

Then, when the timer measurement time T has passed 60 seconds and it is judged YES in (140), first, the current position L of the lumbar plate 28 is compared with the pressing position, that is, the initial position Ls. ((1
42). At this time, as shown in FIG. 3, for example, the current position L of the lumbar plate 28 is changed to the pressing position Ls.
When it is located further rearward, L-Ls <0, so NO is determined in (142), and the lumbar plate is moved forward by the forward rotation of the motor M5 (144).

Then, next, for example, it is judged whether or not the current position L of the lumbar plate 28 exceeds the initial position Ls, it is judged NO until it exceeds the initial position, and the motor M5 is continuously driven. (146). Then, due to the forward movement of the lumbar plate 28, the current position L exceeds the initial position Ls, and at (146), Y
When it is judged as ES, the motor M5 immediately stops, the lumbar plate 28 stops at the position corresponding to the initial position (148), the burst display means 54 turns off (150), and the burst control is ended. It

At the end of one stroke of the burst control, that is, when the timer measurement time T reaches 60 seconds,
For example, when the current position L of the lumbar plate 28 is in the pressing position, that is, in the front of the initial position Ls, L-Ls> 0, so (142)
Is determined to be YES, and the reverse rotation of the motor M5 causes
The lumbar plate is retracted (152).

Then, for example, it is judged whether or not the current position L of the lumbar plate 28 exceeds the initial position Ls, and N is exceeded until it exceeds the initial position Ls.
When it is judged to be O, the motor M5 is continuously driven (15
Four). Then, the current position L exceeds the initial position Ls due to the retreat of the lumbar plate 28, and if YES is determined in (154), the motor M5 immediately stops, and the lumbar plate stops at the position corresponding to the initial position. With (148), burst display means 54
Is extinguished (150) and burst control ends.

In the above burst control, the lumbar plate 28 repeatedly presses the lumbar spine,
A so-called acupressure effect is obtained, and for example, fatigue accumulated in the lumbar spine of a seated person can be reduced under the acupressure effect.
Therefore, back pain can be reduced, and a sufficient effect can be expected to maintain the inverted S-shaped spine shape.

As shown in FIG. 10, when the fluctuation control of the lumbar plate 28 is selected and the fluctuation switch 58 is turned on (202), first, the number of steps n in the time table, the time flag T, and the next step arrival flag are set. FL and the set time elapsed flag Ft are reset (0) (204). At this time, the fluctuation display means (LED) 60 is turned on along with the operation of the fluctuation switch 58, and the start of fluctuation control of the lumbar plate 28 is displayed (206).

Then, the front and rear positions of the lumbar plate 28 are detected by the potentiometer 50 and stored in the central processing unit 14 as the initial position Ls (208) (see FIG. 5). Then, the correction coefficient K corresponding to the initial position Ls of the lumbar plate 28 is calculated (21
0), set position Ln of each step of the timetable
Is corrected in accordance with the correction coefficient, and the lumbar plate 28 is advanced (212) to the position L0 in step 0 corresponding to the correction coefficient, for example, with the forward rotation of the motor M5.

By driving the motor M5, the lumber plate
When 28 moves, it is next determined whether or not the lumbar plate has reached position Ln, that is, position L0 in step 0 (214). Here, it is determined to be NO until the lumbar plate 28 reaches the position L0. When the lumber plate 28 reaches the position L0, if YES is determined in (214), the motor M5 is stopped, and the position of the lumbar plate becomes the position L0 at step 0 corresponding to the correction coefficient K. It is corrected (216) (see FIG. 5).

As can be seen from FIG. 11, after the motor M5 is stopped, a time lag of, for example, 0.2 sec is set (218), and 1 is added to the step number n with the transition to the next step. (220). Then, the current position L of the lumbar plate 28, that is, the set position Ln in the step and the set position Ln + 1 in the next step.
And are compared (222). Here, for example, the position L0 of step 0 is compared with the position L1 of step 1, and as can be seen from Table 2 and FIG. 5, the current position L0 is behind the position L1 of the next step, so L0 It is determined that <L1, that is, Ln <Ln + 1.

When it is determined at (222) that Ln <Ln + 1, as shown in FIG. 12, first, the flag FL is set.
It is determined (224) whether or not is set (1). Here, since the lumbar plate 28 is in the position L0 of step 0, the flag FL is in the reset (0) state, and it is judged as NO. Then, the forward rotation of the motor M5 advances the lumbar plate (226). At this time, the timer (not shown) starts measuring time.

Then, it is judged whether or not the current position L of the lumbar plate 28 has reached the set position Ln of the next step, that is, the position L1 (228).
Normally, immediately after the start of driving the motor M5, the current position L of the lumbar plate 28 has not reached the set position Ln of the next step. Therefore, in (228), first, it is determined as NO, and then, It is determined whether the time measured by the timer has exceeded the set time (230).

Here, the time measured by the timer is, for example, the elapsed time from the set time tn of the previous step to the set time tn + 1 of the next step, and (tn + 1-tn) × K is the predetermined measurement time. Is set as. Then, until the time measured by the timer exceeds the set time, at (230), NO
It is judged that it is returned to (224).

With the forward rotation of the motor M5, the lumbar plate 28 moves forward, and the current position of the lumbar plate is the set position L of step 1, as shown by point a in FIG.
When it reaches 1, it is judged as YES in (228) of FIG. 12, the flag FL is set (1) and (232).
, Motor M5 is stopped (234). Then, next, it is judged whether or not the flag Ft is set (1) (23).
6).

However, since the flag Ft is in the reset (0) state before the set time elapses, it is determined as NO in (236), and the flag Ft is again determined in (224).
It is determined whether L is set (1).

Depending on the set (1) state of the flag FL, (22
If it is judged YES in 4), then it is judged whether or not the time measured by the timer has exceeded the set time (2
30). Then, when the time measured by the timer exceeds the set time and the condition of step 1 is satisfied, at (230), YE
It is judged as S, the flag Ft is set (1) (238), and the stop command of the motor M5 is generated again (234),
Next, at (236), it is judged if the flag Ft is set (1).

Depending on the set (1) state of the flag Ft, (23
If it is determined to be YES in 6), as shown in FIG. 11, both the flag FL and the flag Ft are reset (0) (240), and whether or not the step number n has reached the maximum value 81. It is judged (242) whether or not it is NO until the step 81 is reached, and the process is returned to (218). And (2
After setting the time lag of 0.2 sec in step 18), the step moves to the next step n, that is, step 2 (220), and the current position L1 of the lumbar plate 28 and the set position L2 of step 2 are compared and set again. The positional relationship between the current position L1 and the position L2 is determined (222)
.

As can be seen from Table 2 and FIG. 5, the setting position L2 in step 2 is behind the setting position L1 in step 1, so that FIG.
In (222) of, L1> L2, that is, Ln> Ln +
Judged as 1. Then, the flag FL is set next.
(1) It is judged whether or not it is done (244), but here it is judged as NO, and the lumbar plate 28 is retracted by the reverse rotation of the motor M5 (246).

When the motor M5 is rotated in the reverse direction, it is first determined whether or not the lumbar plate 28 has reached the set position L2 in step 2 (248), and NO is determined because the set position has not been reached. Then, it is judged whether the time measured by the timer has exceeded the set time (250). Here, it is determined as NO until the time measured by the timer reaches the set time, and the process returns to (244).

Then, as shown at point b in FIG. 5, for example, when the lumber plate 28 reaches the set position L2 in step 2 and YES is determined in (248) in FIG. 11, the flag FL is set. (1) Then (252), the motor M5 is stopped under the stop signal (254), and it is judged whether or not the flag Ft is set (1) (25).
6). Here, since the flag Ft is in the reset (0) state, it is judged as NO and the flag is returned to (244).

Depending on the set (1) state of the flag FL, (24
When it is determined to be YES in 4), it is determined in (250) whether or not the time measured by the timer has exceeded the set time. Then, when the measurement time of the timer exceeds the set time and the condition of step 2 is satisfied, in (250),
When YES is determined, the flag Ft is set (1) (258), and the motor M5 stop command is again generated (2).
54).

Then, in (256), the flag F
Whether t is set (1) or not is determined. If YES is determined, both the flag FL and the flag Ft are reset (0) (240). Then, in (242), it is judged whether or not the step number n has reached 81, and if NO is judged, the step is returned to (218) again, and after the time lag of 0.2 sec is set, the step number n is set. After the count-up of (220),
At (222), for example, the set position L2 at the present step and the set position L3 at the next step are compared.

As can be seen from Table 2, the setting position L2 of step 2 and the setting position L3 of step 3
Comparing with, since L3 is larger than L2,
At (222), it is determined that L2 <L3, that is, L1 <Ln + 1, and the forward rotation of the motor M5 causes the lumbar plate 28 to rotate.
Is moved forward again.

When the set position Ln at the current step and the set position Ln + 1 at the next step match, it is determined at (222) in FIG. 11 that Ln = Ln + 1 and the flag FL is set ( After 1) (260), generate a stop signal to the motor M5 (254). That is, when the set positions Ln and Ln + 1 of the preceding and succeeding steps match, the motor M5 is not driven, the timer measurement time has passed the set time, and until YES is determined in (250). , The motor M5 is maintained in a stopped state.

As described above, in the present invention, the motor M5 is drive-controlled at each step along the timetable, and the lumbar plate 28 is repeatedly moved in the front-rear direction. Then, when one step of the fluctuation control is completed and the number of steps n reaches 81, at (242) in FIG.
As judged as ES, as shown in FIG. 13, first,
A time lag of 0.2 seconds is provided (262).

After setting the time lag, it is judged whether or not the current position L is ahead of the initial position Ls of the lumber plate (264). For example, in FIG.
As shown in, the current position L, that is, the step
When the set position L81 in 81 is behind the initial position Ls, it is determined as NO in (264) of FIG. 13, and the normal rotation of the motor M5 causes the lumbar plate 28 to rotate.
Is advanced (266).

Then, it is then judged whether or not the current position L exceeds the initial position Ls (268), YE
The motor M5 is continuously driven until S is determined.
Then, when the current position L of the lumbar plate 28 exceeds the initial position Ls and it is determined YES in (268), the motor M5 is stopped and the lumbar plate is returned to the position corresponding to the initial position (270 ), The fluctuation display means (LED) 60 is turned off (272)
The fluctuation control of the lumbar plate 28 ends.

On the contrary, for example, when the current position L, that is, the set position L81 in step 81 is ahead of the initial position Ls, L
Since −Ls> 0, YE in (264) of FIG.
When it is determined to be S, the lumbar plate 28 is retracted by the reverse rotation of the motor M5 (274).

Then, with the reverse rotation of the motor M5,
It is judged whether or not the current position L exceeds the initial position Ls (276), until the motor is judged as YES.
M5 is continuously driven. And the lumbar plate 28
Current position L exceeds the initial position Ls, and (27
If YES is determined in 6), the motor M5 is stopped, the lumbar plate is returned to the position corresponding to the initial position (278), and the fluctuation display means
The (LED) 60 is turned off (272), and the fluctuation control of the lumbar plate is completed.

In the fluctuation control as described above, a so-called massage effect is obtained by pressing the lumbar vertebrae 28 against the lumbar vertebra of different strengths. Under the massaging effect, for example, the fatigue of the muscles of the lumbar vertebrae can be reduced. Accumulation is prevented. Therefore, accumulation of fatigue in the muscles of the lumbar vertebra can be prevented in advance, and a sufficient effect can be expected for maintaining the inverted S-shaped spinal column shape.

As described above, according to the lumbar support control method for a power seat of the present invention, in addition to the static support for supporting the lumbar spine of the seated person under a constant supporting force, the seated posture is maintained, Two types of automatic control, that is, burst control for automatically moving the lumbar plate 28 repeatedly in the front-rear direction and fluctuation control, are arbitrarily selectable. In other words, by selecting one of the two types of automatic control, the lumbar spine supporting force from the lumbar plate 28 acts on the lumbar spine of the seated person under the so-called acupressure effect and massage effect. It is possible to reduce and prevent fatigue buildup in muscles in advance.

Therefore, the inverted S-shaped spine shape, which is said to cause the least fatigue, can be maintained for a long period of time, and by ensuring an appropriate driving posture of the occupant for a long time, the occupant's comfort, safety, etc. Is sufficiently improved.

According to the present invention, as the automatic control, burst control for periodically pressing the lumbar vertebra of the seated person under a predetermined pressing force and aperiodic pressing under various pressing forces are performed. Fluctuation control is set, and either burst control or fluctuation control can be arbitrarily selected.

Therefore, selection can be easily made according to the degree of fatigue of the seated person, preference, etc., and the seated person does not feel uncomfortable or uncomfortable.

Further, in the present invention, the lumbar plate 28 is repeatedly moved in the anteroposterior direction to reduce the fatigue of the lumbar spine of the seated person and prevent the accumulation of fatigue in advance based on the acupressure effect and the massage effect. Therefore, unlike the vibration effect that continuously gives small vibrations to the seated person,
From this point as well, it is possible to prevent the seated person from feeling uneasy.

Further, if the fluctuation control is executed by the time table expressed by numerical values for each step by removing the minute frequency component and the periodic component from the 1 / f fluctuation waveform, the motor M5 is switched on and off. The operation, that is, the fluctuation operation of the lumber plate, is not accelerated.
Therefore, the motor M5 and lumbar support device 24
Fluctuation control of the lumbar plate 28 can be easily performed without complicating the structure of the front and rear mechanisms.

According to the power seat motor control device 10 of the present invention, the above-described lumbar support control method can be appropriately executed, and the burst control and fluctuation control of the lumbar plate 28 can be surely executed. Therefore, the fatigue of the lumbar spine of the seated person can be reduced and the accumulated fatigue can be prevented in advance, and safe driving can be more reliably performed.

Further, as in the embodiment, by the motor M4,
If the vertical position of the lumbar plate 28 is adjustable, an appropriate position can be set according to the seated person's body shape, preference, and the like. Therefore, regardless of the body shape of the seated person, the sitting posture can be maintained by the lumber plate 28, and the lumber plate burst control and fluctuation control can surely reduce fatigue.

Here, in the embodiment, the stop holding time of the lumbar plate 28 in the burst control can be switched by the switching operation of the select switch 36, but the invention is not limited to this, and the preset holding time is fixed. The burst control may be performed under the stop hold time.

However, if the stop holding time can be switched as in the embodiment, the seated person can arbitrarily select the stop holding time according to his / her fatigue level, preference, etc. The comfort of the seated person is further improved without giving discomfort or the like.

In the embodiment, burst control,
After the end of one stroke of the fluctuation control, the drive control of the motor M5 automatically returns the lumbar plate 28 to the position corresponding to the initial position before execution of the control, but the present invention is not limited to this.

However, in the configuration in which the lumbar plate 28 is returned to the position corresponding to the initial position after the execution of the control, the lumbar vertebra of the seated person is again supported under the support force preset according to the seated person's preference, body shape and the like. Because
It is possible to reliably prevent the shape of the spine from collapsing after the control is executed.

Further, in the burst control of the embodiment, the rear position when the lumbar plate 28 is moved forward and backward is embodied as the final position of the forward and backward movement range.
However, the posterior position of the lumbar plate 28 when it is moved forward and backward is sufficient as long as it does not press the lumbar vertebra of the seated person, so it is not limited to the posterior position but rather the pressing position, that is, the initial position of the lumbar plate 28. Any position may be used as long as it is a rear position.

Further, although the time required for one stroke of the fluctuation control and the drive amount of the motor M5 can be changed corresponding to the initial position of the lumbar plate 28, the present invention is not limited to this.

However, as in the embodiment, if the time required for one stroke of fluctuation control, the drive amount of the motor M5, etc. are changed according to the initial position of the lumbar plate 28, the lumber plate suitable for the initial position can be obtained. Fluctuation control can be easily obtained. Therefore, the seated person does not feel uncomfortable or uncomfortable, and in this respect, the comfort of the seated person is further improved.

Further, the burst display means 54 and the fluctuation display means 60 are both embodied as light emitting diodes (LEDs), but the invention is not limited to this. For example, from other lighting means or buzzer sounding means. Each display means may be configured.

The seat 16 is embodied as a power seat equipped with the seat slide device 18, the seat lifter 20, the reclining device 22, and the lumbar support device 24. However, since at least a power seat provided with the lumbar support device 24 is sufficient, the presence or absence of another seating posture control device does not matter. Further, the present invention may be applied to a motor control device for an assistant seat without being limited to the driver seat.

The embodiment is embodied as a motor control device for a power seat for automobiles. However, a power seat having a lumbar support device will suffice, and the invention is not limited to this.
The motor control device of the present invention may be applied to a seat or the like of an airplane or a ship.

The above-mentioned embodiments are for explaining the present invention and do not limit the present invention in any way.
It goes without saying that the present invention includes all those which are modified or modified within the technical scope of the present invention.

[0127]

As described above, according to the lumbar support control method for a power seat according to the present invention, by selecting the automatic control, the lumbar spine supporting force from the lumbar plate has a so-called acupressure effect and massage effect. And act on the lumbar region of the seated person. Therefore, it is possible to maintain the inverted S-shaped spine shape, which is said to cause the least degree of fatigue, for a long time, and by ensuring an appropriate driving posture of the occupant for a long time, the occupant's comfort and safety are sufficiently improved. Be improved.

As automatic control, burst control for periodically pressing the lumbar vertebra of a seated person under a predetermined pressing force and fluctuation control for aperiodically pressing under various pressing forces are set. Either burst control or fluctuation control can be arbitrarily selected. Therefore, the degree of fatigue of the seated person,
You can easily make selections according to your preferences, etc.
There is no discomfort.

Further, if the stop holding time in burst control can be switched by the changeover operation of the select switch, the seated person can arbitrarily select the stop holding time according to his / her fatigue level, his / her preference, and the like. Further, the comfort of the seated person is further improved without giving discomfort to the seated person.

If the lumbar plate can be returned to the position corresponding to the initial position after the execution of the control, the lumbar vertebra of the seated person will be re-established under the supporting force preset according to the seated person's preference and body shape. Since it is supported, it is possible to reliably prevent the spinal column shape from collapsing after the control is executed.

Further, if the front and rear motors are driven and controlled by the time table expressed by numerical values for each step by removing the minute frequency component and the periodic component from the 1 / f fluctuation waveform, the control of the front and rear motors will be faster. Without becoming
The complication of the configuration of the front-rear motor and the front-rear mechanism of the lumbar support device is sufficiently prevented.

According to the power seat motor control apparatus of the present invention, the above-described lumbar support control method can be appropriately executed, and the burst control and fluctuation control of the lumbar plate can be surely executed. Therefore, the fatigue of the lumbar spine of the seated person can be reduced and the accumulated fatigue can be prevented in advance, and safe driving can be more reliably performed.

Further, if the vertical position of the lumbar plate can be adjusted by the vertical motor, an appropriate position can be set according to the seated person's body shape, taste and the like. Therefore, regardless of the body shape of the seated person, burst control of the lumbar plate, reduction of fatigue due to fluctuation motion, advance prevention of fatigue accumulation, etc. can be reliably achieved.

Further, when the burst display means and the fluctuation display means for informing the execution of the burst control and the fluctuation control are respectively provided, since the execution of each control is clarified, an erroneous operation during the control execution, and The illusion of a seated person can be sufficiently prevented.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a motor control device for a power seat according to the present invention.

FIG. 2 is a detailed block diagram centering on a central processing unit of the power seat motor control device.

FIG. 3 is a schematic operation diagram of a lumbar plate in burst control.

FIG. 4 is a waveform diagram showing an example of a 1 / f fluctuation waveform.

FIG. 5 is a schematic operation diagram of a lumbar plate in fluctuation control.

FIG. 6 is a schematic operation diagram of front and rear motors and lumbar plates in fluctuation control.

FIG. 7 is a flowchart of a burst control routine in the power seat lumbar support control method of the present invention.

FIG. 8 is a flowchart of a burst control routine in the power seat lumbar support control method of the present invention.

FIG. 9 is a flowchart of a burst control routine in the lumbar support control method for a power seat of the present invention.

FIG. 10 is a flowchart of a fluctuation control routine in the power seat lumbar support control method of the present invention.

FIG. 11 is a flowchart of a fluctuation control routine in the power seat lumbar support control method of the present invention.

FIG. 12 is a flowchart of a fluctuation control routine in the power seat lumbar support control method of the present invention.

FIG. 13 is a flowchart of a fluctuation control routine in the power seat lumbar support control method of the present invention.

[Explanation of symbols]

 10 Power seat motor controller 12 Operation switch 14 Central processing unit 16 Seat (power seat) 24 Lumbar support device 28 Lumbar plate 30 Drive circuit 38 Lumbar up / down switch (manual switch) 40 Lumbar front / rear switch (manual switch) 42 Micro Computer (microcomputer) 50 Position detection means (potentiometer) 52 Burst switch 54 Burst display means (light emitting diode) 56 Select switch 58 Fluctuation switch 60 Fluctuation display means (light emitting diode)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication H02P 7/00 R 9063-5H

Claims (7)

[Claims] 1. A lumbar support control method for a power seat, wherein at least the longitudinal position of a lumbar plate supporting a lumbar vertebra of a seated person can be adjusted by driving control of a longitudinal motor, and the longitudinal position of the lumbar plate is manually controlled. In addition to the manual control for pressing the lumbar vertebra of the seated person under a predetermined lumbar support force, at least two of the burst control for moving the lumbar plate back and forth almost periodically and the fluctuation control for moving the lumbar plate back and forth aperiodically. Any kind of automatic control can be selected, and under the selection of burst control, the front and rear motors are driven and controlled almost periodically with a specific stop holding time, and the lumbar plate is arbitrarily controlled. Between the adjusted initial position before execution and the predetermined rear position, from the predetermined switch operation to the predetermined time The motor for front and back corresponds to the frequency component and period component of the 1 / f fluctuation waveform created by waveform synthesis by the Fourier series under the fluctuation control selection. The amber plate is driven and controlled aperiodically based on the driving time and the driving amount.
A lumbar support control method for a power seat, wherein the lumbar support control is performed aperiodically repeatedly in the front-rear direction within a front-rear movement range for a predetermined time after a predetermined switch operation. 2. A select switch is operated to change the
The lumbar support control method for a power seat according to claim 1, wherein a specific stop hold time in burst control is arbitrarily selected. 3. The front and rear positions of the lumbar plate before executing the control are detected and stored as an initial position. After the control is executed, the current position of the lumbar plate is compared with the stored initial position to detect the front and rear motors. 3. The lumbar support control method for a power seat according to claim 1, wherein the lumbar plate is automatically returned to a position corresponding to the initial position by drive control. 4. A pseudo fluctuation waveform is formed by removing a minute frequency fluctuation component and a minute period fluctuation component from the 1 / f fluctuation waveform, and the driving time and driving amount of the front and rear motors are calculated from the pseudo fluctuation waveform to determine a predetermined value. A timetable is created for each step, and the fluctuation control of the lumbar plate in one stroke can be executed by the drive control of the motor according to the drive time and the drive amount of the front-back motor in each step of the timetable. 4. A lumbar support control method for a power seat according to any one of 1 to 3. 5. A front / rear motor for moving a lumbar plate supporting a lumbar vertebra of a seated person in the front / rear direction, a front / rear switch for manually controlling the drive of the front / rear motor to adjust the front / rear position of the lumbar plate, and a lumber. A burst switch that performs plate burst control, a fluctuation switch that performs lumbar plate fluctuation control, a drive circuit that controls the drive and stop of the front and rear motors by turning on and off, and the front and rear position of the lumber plate. Position detection means for processing, and processing the input information according to a predetermined program,
A central processing unit for driving and controlling a corresponding motor, and at least, and in addition to manual control for manually controlling the anterior-posterior position of the lumbar plate to press the lumbar spine of the seated person under a predetermined lumbar spine supporting force, At least two of the burst control for moving the lumbar plate back and forth almost periodically and the fluctuation control for moving it aperiodically back and forth.
A motor control device for a power seat that has various types of automatic control and is configured such that manual control or automatic control can be arbitrarily selected. 6. Burst display means for displaying from the operation of the burst switch to the end of one step of the burst control and notifying that the burst control of the lumber plate is being executed, and the operation of the fluctuation switch to the end of one step of the fluctuation control. 6. The motor control device for the power seat according to claim 5, further comprising: a fluctuation display unit that displays up to and indicates that the fluctuation control of the lumber plate is being performed. 7. The vertical movement motor for moving the lumbar plate in the vertical direction, and the vertical movement switch for manually controlling the driving of the vertical movement motor to adjust the vertical position of the lumbar plate. 6. A power seat motor control device according to item 6.