JP2014136543A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote blood circulation of inferior limb of an operator for reducing fatigue and relax local numbness effectively.SOLUTION: The vehicular seat comprises:a pulse wave sensor 12 for detecting pulse wave of a seating person; plural air bags 16 disposed on a vehicular seat; an air bag pump unit 14 for operating the plural air bags 16; a seat control ECU 20 for control operation of the air bag pump unit 14 so as to operate the plural air bags 16 so that each air bag 16 is operated in the order that the air bag 16 disposed on a position separated from the heart of the seating person is operated and then the air bag 16 disposed on a position close to the heart is operated in synchronization to the detected pulse wave by the pulse wave sensor 12; and a display part 18.

Description

  The present invention relates to a vehicle seat, and more particularly, to a vehicle seat with a massage function.

  2. Description of the Related Art There is known a vehicle control device that detects driver fatigue and vibrates a vehicle seat to suppress the driver fatigue or awaken the driver.

  For example, in the technique described in Patent Document 1, the physical condition of the driver is determined based on the detected pulsation by detecting the pulsation of the driver, and the vibration timing and amplitude are determined based on the determined physical condition of the driver. It has been proposed to prevent the driver from feeling uncomfortable with the vibration of the seats and the like by controlling the vehicle to give the driver vibration.

JP 2012-136134 A

  However, in the technique described in Patent Document 1, since the seat seat is merely vibrated in a pattern synchronized with the heartbeat, further improvement in preventing thrombus symptoms in the driver's lower limbs, relieving fatigue, or awakening. There is room.

  The present invention has been made in consideration of the above-described facts, and aims to promote blood circulation of the driver's lower limbs, reduce fatigue, and effectively relieve local numbness.

  In order to achieve the above object, the invention according to claim 1 is characterized in that an acquisition means for acquiring the pulse wave detected by a detection means for detecting a pulse wave of an occupant, at least a seat cushion and a seat back of a vehicle seat. A plurality of compression means for compressing the occupant provided on one side, a drive means for driving each of the plurality of compression means, and a position far from the occupant's heart in synchronization with the pulse wave acquired by the acquisition means Control means for controlling the driving means so as to drive the plurality of compression means in the order of the compression means arranged at a position close to the heart from the compression means arranged on the head.

  According to the first aspect of the present invention, the detection means detects the occupant's pulse wave, and the acquisition means acquires the detected pulse wave.

  A plurality of compression means are provided on at least one of the seat cushion and the seat back of the vehicle seat, and the occupant is compressed. For example, an occupant can be compressed using an airbag that expands and contracts. Alternatively, the occupant may be compressed using a mechanical mechanism such as a cam.

  The driving means drives each of the plurality of compression means. In other words, the occupant is compressed by driving the compression means by the drive means.

  In the control means, in synchronization with the pulse wave acquired by the acquisition means, the plurality of compression means are driven in the order of the compression means arranged at a position far from the occupant's heart to the compression means arranged at a position close to the heart. Thus, the driving means is controlled. As a result, in synchronization with the pulse wave, the occupant is compressed by driving in order from the compression means located in the erasing part far from the driver's heart, so that circulation of blood to the heart can be promoted. And by improving the circulation around the blood, it is possible to alleviate sitting fatigue and local numbness during long driving. Therefore, driver fatigue can be reduced and local numbness can be effectively relieved.

  The compression means may be provided at a position corresponding to at least one of the venous blood vessels and lymph vessels of the occupant as in the invention described in claim 2 to compress the region. Thereby, the circulation of blood to the heart can be effectively promoted.

  Further, as in the invention according to claim 3, the control means calculates the fatigue level of the occupant based on the pulse wave acquired by the acquisition means, and the calculated fatigue level is greater than or equal to a predetermined fatigue level In addition, the control of the driving means may be started, or the degree of fatigue of the occupant is calculated based on the pulse wave acquired by the acquiring means, as in the invention according to claim 4. Determining at least one of the pulse wave synchronization timing, the drive speed of the drive means, and the compression strength of the compression means when the drive means is driven in accordance with the degree of fatigue. You may make it control a drive means. In this case, as in the invention described in claim 5, display means for performing display according to the degree of fatigue may be further provided.

  Moreover, the invention according to any one of claims 1 to 3 further includes setting means for setting the synchronization timing of the pulse wave when driving the driving means, as in the invention according to claim 6. The control means may control the driving means in synchronization with the synchronization timing set by the setting means.

  Further, as in the invention according to claim 7, the detection means is provided on a steering wheel, an occupant's arm, an occupant's finger, or an armrest, and the acquisition means acquires a detection result of the detection means by wireless communication. You may do it.

  According to the present invention, in synchronization with the pulse wave, by driving the plurality of compression means in the order of the compression means arranged at a position far from the passenger's heart to the compression means arranged at a position close to the heart, the driver The blood circulation of the lower limbs is promoted to reduce fatigue, and local numbness can be effectively relieved.

It is a figure which shows the vehicle mounting state of the vehicle seat concerning embodiment of this invention. It is a perspective view showing the appearance of the vehicular seat concerning an embodiment of the invention. It is a block diagram which shows the structure of the control system of the vehicle seat concerning embodiment of this invention. It is a timing chart for demonstrating the drive of the airbag synchronized with the pulse wave. It is a figure which shows the fixed time lag of a pulse wave trigger signal and the drive signal of an airbag pump unit. It is a flowchart which shows an example of the flow of a process at the time of starting the program memorize | stored in ROM of seat control ECU in the vehicle seat concerning embodiment of this invention, and performing a massage control routine. It is a figure which shows an example which set the timing, the speed, and the intensity | strength according to the fatigue level. It is a flowchart which shows an example of the flow of a process at the time of starting the program memorize | stored in ROM of seat control ECU of the modification, and performing a massage control routine.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a view showing a vehicle mounting state of a vehicle seat according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an appearance of the vehicle seat according to an embodiment of the present invention.

  As shown in FIGS. 1 and 2, the vehicle seat includes a seat back 32 and a seat cushion 34. The seat cushion 34 is a seat surface on which the driver sits, and the seat back 32 functions as a backrest provided corresponding to the driver's back.

  Although the vehicle seat of the present embodiment is described as being applied to a seat on which a driver is seated, it may be a passenger seat or a rear seat on which a seat other than the driver is seated.

  In the vehicle seat 10 of the present embodiment, a plurality of airbags 16 are provided on each of the seat back 32 and the seat cushion 34. The plurality of airbags 16 are expanded and contracted by an airbag pump described later.

  In this embodiment, an example in which the airbag 16 is provided in each of the seat cushion 34 and the seat back 32 will be described. However, the airbag 16 may be provided in the seat cushion 34 or the seat back 32.

  The plurality of airbags 16 are provided in portions of the seat back 32 and the seat cushion 34 corresponding to the venous blood vessels and lymph vessels of the driver. That is, the venous blood vessels and lymph vessels are compressed by inflating and expanding / contracting the airbag. In this embodiment, an example in which a driver (venous blood vessel or lymphatic vessel) is compressed using an airbag will be described. However, the driver's compression is not limited to an airbag. A mechanical configuration may be applied, or another configuration may be applied.

  Further, in FIG. 2, an example in which a plurality of airbags are provided at positions corresponding to the body side portion where the driver's venous blood vessels and lymph vessels are present may be provided. For example, the seat cushion 34 may be provided at a position corresponding to the venous blood vessel or lymphatic vessel near the inside of the thigh of the foot.

  Further, the steering 22 is provided with a pulse wave sensor 12 for detecting a driver's pulse wave, and the pulse wave sensor 12 detects the driver's pulse wave.

  Next, the configuration of a control system that drives the airbag 16 of the vehicle seat 10 according to the embodiment of the present invention will be described. FIG. 3 is a block diagram showing the configuration of the control system of the vehicle seat 10 according to the embodiment of the present invention.

  The vehicle seat 10 includes a seat control ECU (Electronic Control Unit) 20 for controlling driving of the plurality of airbags 16.

  The seat control ECU 20 includes a microcomputer including a CPU 20AA, a RAM 20BB, a ROM 20CC, and an I / O 20DD.

  The ROM 20CC of the seat control ECU 20 stores information for performing drive control of the airbag 16, a program for executing a massage control routine, which will be described later, and the like, and the RAM 20BB is a memory for performing various calculations performed by the CPU 20AA. Used as.

  The above-described pulse wave sensor 12 provided on the steering 22 is connected to the I / O 20DD, and the detection result of the pulse wave sensor 12 is input to the seat control ECU 20.

  The I / O 20D is connected to an air bag pump unit 14 for driving each air bag 16 and a display unit 18 for notifying various information. The drive is controlled and the display on the display unit 18 is controlled.

  Here, drive control of the airbag pump unit 14 by the seat control ECU 20 will be described. The drive control of the airbag pump unit 14 is performed by starting a program stored in the ROM 20C and executing a massage control routine.

  First, when the execution of the massage control routine is started, the pulse wave of the driver is detected by the pulse wave sensor 12, and the detection result is input to the seat control ECU 20 via the I / O 20D.

  The seat control ECU 20 calculates the driver's fatigue level based on the driver's pulse wave detected by the pulse wave sensor 12.

  The calculation of driver fatigue is described in, for example, Akita University Faculty of Engineering Resource Research Report, No. 30, October 2009, Research Report “Wisdom Examination of Stress and Fatigue of VDT Workers by Heart Rate Variability” The degree of fatigue can be calculated quantitatively using technology. In other words, based on the detection result of the pulse wave sensor 12, after analyzing the peak interval (RR interval) fluctuation in the pulse wave waveform, the RR interval fluctuation is converted into equal time interval data in a predetermined manner. By performing spline interpolation at the resampling frequency and performing statistical analysis, the heart rate and the RR interval variation coefficient are calculated, and the power spectrum density of the RR interval variation is analyzed by frequency spectrum analysis (FFT). Then, the low frequency component (LF), the high frequency component (HF), and LF / HF are calculated. The fatigue level can be calculated quantitatively from these indices.

  Alternatively, the pulse may be obtained from the detection result of the pulse wave sensor 12, and the degree of fatigue may be calculated quantitatively from a change in pulse or the like. For example, the degree of fatigue may be determined in advance according to the change degree of the pulse, and the degree of fatigue may be calculated, or another method may be used.

  When the driver's fatigue level is calculated, the seat control ECU 20 controls the display unit 18 to display the calculation result to notify the driver's fatigue level. For example, a green lamp, a yellow lamp, a red lamp, or the like may be provided as a display unit 18 in a vehicle combination meter or the like, and a predetermined lamp may be turned on according to the degree of fatigue. You may make it alert | report by this.

  Further, the seat control ECU 20 determines whether or not the calculated fatigue level is equal to or higher than a predetermined fatigue level. If the calculated fatigue level is equal to or higher than the predetermined fatigue level, the seat control ECU 20 drives the airbag pump unit 14 to control the driving of the airbag 16. At this time, the airbag pump unit 14 is controlled so as to inflate in order from the airbag 16 of the erasing portion far from the driver's heart in synchronization with the driver's pulse wave detected by the pulse wave sensor 12. Specifically, assuming that the airbag A, the airbag B, the airbag C, the airbag D, and the airbag E are arranged farther from the heart in this order, as shown in FIG. In synchronization with the detection result (pulse wave trigger), the airbag pump unit 14 is controlled so as to inflate in order from the far airbag A. Thus, in synchronization with the pulse wave, the occupant is inflated in order from the airbag 16 located at the erasing portion far from the driver's heart, and the occupant is pressed, so that the circulation of blood to the heart can be promoted. Better blood circulation can relieve sitting fatigue and local numbness during long driving.

  Further, when the seat control ECU 20 controls the airbag pump unit 14 in synchronization with the pulse wave, the seat control ECU 20 sets a predetermined time lag d in the pulse wave trigger signal and the drive signal of the airbag pump unit 14. The drive of the airbag pump unit 14 is controlled. As shown in FIG. 5, the constant time lag d is a time lag from the peak value of the pulse wave (pulse wave trigger signal), and is a predetermined time (for example, 0.3 to 0. 4S) is set. Thus, by inflating the airbag 16 in order, it is possible to surely promote the circulation of blood to the heart without inhibiting the blood flow.

  Next, a specific flow of processing performed by the seat control ECU 20 of the vehicle seat 10 according to the embodiment of the present invention configured as described above will be described. FIG. 6 is a flowchart illustrating an example of a process flow when the massage control routine is executed by starting a program stored in the ROM 20C of the seat control ECU 20. The massage control routine is started when the ignition switch is turned on in a state where execution of the control is set by a massage mode button or the like, for example.

  When the massage control routine is started, in step 100, the pulse wave sensor 12 detects the driver's pulse wave, the detection results are sequentially acquired, and the process proceeds to step 102. That is, the driver's pulse wave is detected by the pulse wave sensor 12 provided on the steering wheel 22, and the detection result is taken into the seat control ECU 20 via the I / O 20D.

  In step 102, fatigue level calculation processing based on the pulse wave is performed, and the routine proceeds to step 104. As described above, the calculation method of the fatigue level is, for example, based on the detection result of the pulse wave sensor 12, after analyzing the fluctuation of the peak interval (RR interval) in the waveform of the pulse wave, the RR interval It may be performed by calculating each index by performing spline interpolation at a predetermined re-sampling frequency in order to convert fluctuation into equal time interval data, or depending on the degree of change in pulse The degree of fatigue may be determined in advance and the degree of fatigue may be calculated, or another method may be used.

  In step 104, it is determined whether or not the airbag pump unit 14 is already operating. This determination is made as to whether or not the air pump unit 14 is driven after the processing described below has already been performed. If the determination is negative, the process proceeds to step 106, and if the determination is affirmative, step 110 is performed. Migrate to

  In Step 106, it is determined whether or not the calculated fatigue level is equal to or greater than a predetermined fatigue level. If the determination is affirmative, the process proceeds to Step 108. If the determination is negative, the process returns to Step 100 and the above processing is repeated. It is.

  In step 108, the air bag 16 is inflated in order from the airbag 16 far from the heart in synchronization with the driver's pulse wave detected by the pulse wave sensor 12, and the process proceeds to step 110. That is, as shown in FIG. 4, the airbag pump unit 14 is controlled to inflate in order from the far airbag A in synchronization with the detection result (pulse wave trigger) of the driver's pulse wave sensor. In the example of FIG. 4, the airbag pump unit 14 is controlled so that the airbag 16 from the airbag A to the airbag E is driven in synchronization with the pulse wave. Thus, in synchronization with the pulse wave, the occupant is inflated in order from the airbag 16 located at the erasing portion far from the driver's heart, and the occupant is pressed, so that the circulation of blood to the heart can be promoted. Better blood circulation can relieve sitting fatigue and local numbness during long driving.

  In step 110, the pulse wave sensor 12 detects the driver's pulse wave again, and the process proceeds to step 112. That is, the pulse wave of the driver is detected by the pulse wave sensor 12 provided on the steering wheel 22, and the detection result is input to the seat control ECU 20 via the I / O 20D.

  In step 112, as in step 102, a fatigue level calculation process based on the pulse wave is performed, and the routine proceeds to step 114.

  In step 114, it is determined whether or not the calculated fatigue level is less than the predetermined fatigue level. If the determination is affirmative, the process proceeds to step 116. If the determination is negative, the process returns to step 100 and the above-described processing is performed. Is repeated.

  In step 116, the driving of the airbag pump unit 14 is stopped and the routine proceeds to step 118.

  In step 118, it is determined whether or not system-off is instructed. The determination is made, for example, by determining whether or not an instruction to cancel the setting of the massage control routine has been issued, or whether or not the ignition switch has been turned off. The process described above is repeated and the above process is repeated. If the result is affirmative, the process of the series of massage control routines is terminated.

  The driving of the air bag pump unit 14 may be selectable by a passenger's button operation such as a double beat or a 1/2 beat with respect to the synchronized pulse wave.

  Then, the modification of the vehicle seat concerning embodiment of this invention is demonstrated. Since the basic configuration of the vehicle seat is the same as that of the above-described embodiment, the detailed description is omitted and only the difference will be described.

  In the above-described embodiment, the driver's fatigue level is calculated based on the driver's pulse wave detected by the pulse wave sensor 12, and when the fatigue level is equal to or higher than the predetermined fatigue level, the airbag 16 of the erasure part far from the heart is used. In the modification, the drive of the airbag pump unit 14 is simply controlled when the degree of fatigue is equal to or greater than the predetermined fatigue level. Instead, the synchronization timing, speed, strength, and the like when driving the airbag pump unit 14 are determined according to a predetermined fatigue level and are driven.

  That is, the ROM 20C of the seat control ECU 20 stores a table in which parameters such as synchronization timing, speed, strength, and the like when driving the airbag pump unit 14 are determined for each predetermined level according to the degree of fatigue. The massage control routine program for controlling the driving of the airbag pump unit 14 according to the table is stored in the ROM 20C, and the driving of the airbag pump unit 14 is controlled by starting the program. This is different from the above embodiment.

  For example, as shown in FIG. 7, the fatigue level is determined in advance from level 1 to level 3, and the timing, speed and strength are determined in advance for each level. The unit 14 may be driven.

  For example, with 1/2 beat, the airbag 16 is driven at an interval of once every two pulse waves, and at equal beats, the airbag 16 is driven every pulse wave. In the beat, the airbag 16 is driven twice for one pulse wave (two airbags are continuously driven). Further, the speed represents the expansion speed of the airbag 16, and the airbag expansion speed (air inflow speed) is predetermined in three stages, for example, slow, normal, and fast. The strength indicates the final pressure when the airbag 16 is inflated, and the pressure (air inflow amount) when the airbag is inflated in three stages, such as weak, medium, strong, etc. Predetermined. In the example of FIG. 7, an example divided into three levels is shown, but the present invention is not limited to this, and it may be two levels or four or more levels. In the example of FIG. 7, the timing, speed, and strength are both set. However, the present invention is not limited to this, and at least one of timing, speed, and strength may be set. .

  Next, a specific flow of processing performed by the seat control ECU 20 in the modified example of the vehicle seat according to the embodiment of the present invention will be described. FIG. 8 is a flowchart illustrating an example of a flow of processing when a massage control routine is executed by starting a program stored in the ROM 20C of the seat control ECU 20 of the modification. Note that the massage control routine of the modified example is also started when the ignition switch is turned on in a state where execution of the control is set by a massage mode button or the like, for example.

  When the massage control routine is started, in step 200, the pulse wave of the driver is detected by the pulse wave sensor 12, the detection results are sequentially acquired, and the process proceeds to step 202. That is, the driver's pulse wave is detected by the pulse wave sensor 12 provided on the steering wheel 22, and the detection result is taken into the seat control ECU 20 via the I / O 20D.

  In step 202, a fatigue level calculation process based on the pulse wave is performed, and the routine proceeds to step 204. As described above, the calculation method of the fatigue level is, for example, based on the detection result of the pulse wave sensor 12, after analyzing the fluctuation of the peak interval (RR interval) in the waveform of the pulse wave, the RR interval It may be performed by calculating each index by performing spline interpolation at a predetermined re-sampling frequency in order to convert fluctuation into equal time interval data, or depending on the degree of change in pulse The degree of fatigue may be determined in advance and the degree of fatigue may be calculated, or another method may be used.

  In step 204, it is determined whether the airbag pump unit 14 is already operating. This determination is made as to whether or not the air pump unit 14 has been driven by the processing that will be described later. If the determination is negative, the process proceeds to step 206. If the determination is affirmative, the process proceeds to step 212. Migrate to

  In step 206, it is determined whether or not the calculated fatigue level is equal to or greater than the predetermined fatigue level. If the determination is affirmative, the process proceeds to step 208. If the determination is negative, the process returns to step 200 and the above-described processing is repeated. It is.

  In step 208, the air bag pump drive is set according to the fatigue level, and the routine proceeds to step 210. That is, it corresponds to the fatigue level calculated in step 202 from a table in which parameters such as timing, speed, strength, etc. for driving the airbag pump unit 14 are determined for each level predetermined according to the fatigue level. Parameters for driving the airbag pump unit 14 are set.

  In step 210, the airbag pump unit 14 is driven in synchronization with the driver's pulse wave detected by the pulse wave sensor 12 according to the setting in step 208, and the routine proceeds to step 214. That is, as shown in FIG. 4, inflating with parameters (timing, speed, strength, etc.) set in order from the farther airbag A in synchronization with the detection result (pulse wave trigger) of the driver's pulse wave sensor. Thus, the airbag pump unit 14 is controlled. In the example of FIG. 4, the airbag pump unit 14 is controlled so that the airbag 16 from the airbag A to the airbag E is driven with parameters set in synchronization with the pulse wave. Thus, in synchronization with the pulse wave, the occupant is inflated in order from the airbag 16 located at the erasing portion far from the driver's heart, and the occupant is pressed, so that the circulation of blood to the heart can be promoted. Better blood circulation can relieve sitting fatigue and local numbness during long driving. Moreover, since the driving of the airbag is controlled according to the degree of fatigue, a massage effect according to the degree of fatigue can be given to the occupant.

  On the other hand, in step 212, it is determined whether the fatigue level has changed. The determination is made as to whether or not the degree of fatigue has changed after the airbag pump unit 14 is driven. If the determination is affirmative, the process proceeds to step 208 described above. Control goes to step 214.

  In step 214, the pulse wave sensor 12 detects the driver's pulse wave again, and the process proceeds to step 216. That is, the pulse wave of the driver is detected by the pulse wave sensor 12 provided on the steering wheel 22, and the detection result is input to the seat control ECU 20 via the I / O 20D.

  In step 216, similarly to step 202, a fatigue level calculation process based on the pulse wave is performed, and the process proceeds to step 218.

  In step 218, it is determined whether or not the calculated fatigue level is less than the predetermined fatigue level. If the determination is affirmative, the process proceeds to step 220. If the determination is negative, the process returns to step 200 and the above-described processing is performed. Is repeated.

  In step 220, the driving of the airbag pump unit 14 is stopped and the routine proceeds to step 222.

  In step 222, it is determined whether or not an instruction to turn off the system has been issued. The determination is made, for example, by determining whether or not an instruction to cancel the setting of the massage control routine has been issued, or whether or not the ignition switch has been turned off. The process described above is repeated and the above process is repeated. If the result is affirmative, the process of the series of massage control routines is terminated.

  In the above-described embodiment and modification, an example in which the pulse wave sensor 12 is provided in the steering wheel 22 is shown. However, the present invention is not limited to this. For example, a seat-type pulse wave sensor is used to perform seating by wireless communication or the like. You may make it transmit the detection result of a pulse wave to control ECU20. Or you may make it provide in an armrest and may make it provide in another site | part. Alternatively, the pulse wave may be detected at any of a plurality of positions.

  In the embodiment and the modification described above, the vehicle seat 10 of the driver's seat has been described. However, the present invention is not limited to this, and the above configuration may be applied to the passenger seat and the rear seat. When applied to other than the driver's seat, the pulse wave sensor 12 can be applied to the passenger seat or the rear seat by providing the wristwatch type or armrest instead of the steering wheel 22.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 12 Pulse wave sensor 14 Air bag pump unit 16 Air bag 18 Display part 20 Seat control ECU
22 Steering 32 Seat back 34 Seat cushion

Claims (7)

An acquisition means for acquiring the pulse wave detected by the detection means for detecting the pulse wave of the occupant;
A plurality of compression means provided on at least one of a seat cushion and a seat back of a vehicle seat to compress an occupant;
Drive means for driving each of the plurality of compression means;
In synchronization with the pulse wave acquired by the acquisition means, the plurality of compression means are driven in the order of the compression means arranged at a position close to the heart from the compression means arranged at a position far from the occupant's heart. Control means for controlling the drive means;
Vehicle seat equipped with   The vehicle seat according to claim 1, wherein the compression means is provided at a position corresponding to at least one of a venous blood vessel and a lymphatic vessel of an occupant and compresses the region.   The said control means calculates a passenger | crew's fatigue degree based on the said pulse wave acquired by the said acquisition means, and when the calculated fatigue degree is more than predetermined fatigue degree, the control of the said drive means is started. The vehicle seat according to claim 1 or 2.   The control means calculates the occupant's fatigue level based on the pulse wave acquired by the acquisition means, and the pulse wave synchronization timing when driving the drive means according to the calculated fatigue level, The vehicle seat according to any one of claims 1 to 3, wherein at least one of a driving speed of the driving unit and a compression strength of the pressing unit is determined, and the driving unit is controlled according to a determination result.   The vehicle seat according to claim 3, further comprising display means for performing display according to the degree of fatigue.   And further comprising setting means for setting a synchronization timing of the pulse wave when driving the driving means, wherein the control means controls the driving means in synchronization with the synchronization timing set by the setting means. Item 4. The vehicle seat according to any one of Items 1 to 3.   The detection means is provided on a steering wheel, an occupant's arm, an occupant's finger, or an armrest, and the acquisition means acquires the detection result of the detection means by wireless communication. Vehicle seats.