JP2012131269A - Motion sickness reducing device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motion sickness reducing device and a method for reducing an unpleasant feeling and a sense of incongruity imparted to a rider.SOLUTION: This motion sickness reducing device includes a stimulation means 1 for imparting stimulation for inducing driver-like head-part-motion in the rider C of a vehicle. The stimulation member 1 pushes a part of the body positioned on the centrifugal side of the rider when turning the vehicle. The driver-like head-part-motion is induced in the rider C, and since a fellow rider can also be made to perform the driver-like head-part-motion, motion sickness of the fellow rider can be reduced. Since the rider C actively performs the driver-like head-part-motion, the unpleasant feeling and the sense of incongruity imparted to the rider C is reduced, and the motion sickness reducing effect is also high.

Description

  The present invention relates to a motion sickness reduction apparatus and method. More specifically, the present invention relates to a motion sickness reducing apparatus and method for reducing motion sickness of a vehicle occupant.

  In general, it is known that a vehicle driver is less likely to suffer from motion sickness (motion sickness) than a passenger. In addition, when focusing on the head movements of the driver and the passenger traveling on a curve, the driver tilts his head in the turning direction (centric direction) of the vehicle, but the passenger is facing away from the driver ( It is known that the head is tilted in a direction (centrifugal direction) in which centrifugal force is generated by turning the vehicle. From these, it is considered that the difference between the driver's and passenger's head movements and the occurrence of motion sickness, and if the passengers make head movement similar to the driver's head movement, It is thought that the passenger's motion sickness can be reduced.

Patent Document 1 describes a technique in which a headrest is swingably provided on a back portion of a vehicle seat, and the headrest of the occupant is tilted in a centripetal direction by swinging the headrest according to the turning state of the vehicle. Has been.
According to this prior art, the head of the passenger can be forcibly tilted, and the head movement similar to the driver's head movement can be performed, so that the passenger's motion sickness can be reduced. Yes.

However, in the above prior art, when the vehicle turns, the occupant's torso is tilted in the centrifugal direction by centrifugal force, but only the head fixed to the headrest is forcibly tilted in the centripetal direction. Uncomfortable and the centrifugal force acting on the body by the turning of the vehicle is supported by the neck, which makes the passenger feel uncomfortable. Therefore, there is a problem that the above conventional technique is not practical.
In addition, it is considered necessary for the occupant to actively perform head movements in order to reduce motion sickness. However, since the occupant passively tilts the head in the above-described prior art, the effect of reducing motion sickness is low. There is a problem.

Japanese Patent Application No. 7-252

  In view of the circumstances described above, an object of the present invention is to provide a motion sickness reduction apparatus and method with less discomfort and discomfort for passengers.

The motion sickness reduction apparatus according to the first aspect of the present invention is characterized by comprising stimulation means for giving a stimulus for inducing a driver-like head movement to a vehicle occupant.
The motion sickness reduction apparatus according to a second aspect of the present invention is characterized in that, in the first aspect, the stimulating means pushes a part of the body located on the distal side of the occupant when the vehicle turns.
In the motion sickness reduction apparatus according to a third aspect of the present invention, in the second aspect, the stimulation means includes a plurality of air packs, an air supply source for supplying air to the plurality of air packs, and supply of air to the plurality of air packs. And the plurality of air packs are provided at positions laid on a part of the body located on the left and right of the occupant.
The motion sickness reduction apparatus according to a fourth aspect of the present invention is the second or third aspect of the present invention, wherein a part of the occupant's body is one or a combination of two or more of the occupant's thigh, buttocks, hips, and back. It is characterized by being.
The motion sickness reduction apparatus according to a fifth aspect of the present invention is characterized in that, in the first aspect, the stimulation means supports a part of the body located on the distal side of the occupant from the side when the vehicle turns. To do.
The motion sickness reduction apparatus according to a sixth aspect of the present invention is the fifth aspect, wherein the stimulation means includes a plurality of air packs, an air supply source for supplying air to the plurality of air packs, and supply of air to the plurality of air packs. And the plurality of air packs are provided at positions to support a part of the occupant's body from the side.
The motion sickness reducing apparatus according to a seventh aspect of the present invention is the fifth or sixth aspect, wherein a part of the occupant's body is one or a combination of two or more of the occupant's thigh, buttocks, hips, and trunk. It is characterized by being.
The motion sickness reduction apparatus according to an eighth aspect of the present invention is characterized in that, in the first aspect, the stimulation means tilts the occupant's torso in a centripetal direction when the vehicle turns.
The motion sickness reduction apparatus according to a ninth aspect of the invention is the eighth invention, wherein the stimulation means includes a plurality of air packs, an air supply source for supplying air to the plurality of air packs, and supply of air to the plurality of air packs. And the plurality of air packs are provided at positions laid on a part of the body located on the left and right of the occupant.
The motion sickness reduction apparatus according to a tenth aspect of the present invention is characterized in that, in the first aspect, the stimulating means gives a stimulus by a pain sensation to a part of the body located on the distal side of the occupant when the vehicle turns. And
The motion sickness reduction method according to an eleventh aspect of the invention is characterized in that a stimulus for inducing a driver-like head movement is given to a vehicle occupant.
The motion sickness reduction method according to a twelfth aspect of the invention is characterized in that, in the eleventh aspect of the invention, a part of the body located on the distal side of the occupant is pushed when the vehicle turns.
The motion sickness reduction method according to a thirteenth aspect of the present invention is that in the twelfth aspect of the present invention, the body part of the occupant is one or a combination of two or more of the occupant's thigh, buttocks, hips, and back. Features.
The motion sickness reduction method according to a fourteenth aspect of the invention is characterized in that, in the eleventh aspect, when the vehicle turns, a part of the body located on the distal side of the occupant is supported from the side.
The motion sickness reduction method according to a fifteenth aspect of the present invention is that in the fourteenth aspect, the body part of the occupant is one or a combination of two or more of the thigh, the buttocks, the waist, and the trunk of the occupant. Features.
The motion sickness reduction method according to a sixteenth aspect of the invention is characterized in that, in the eleventh aspect, the occupant's torso is tilted in a centripetal direction when the vehicle turns.
The motion sickness reduction method according to a seventeenth aspect of the present invention is characterized in that, in the eleventh aspect of the invention, when the vehicle turns, a part of the body located on the distal side of the occupant is stimulated by pain.

According to the first aspect of the invention, the driver-like head movement can be induced in the occupant and the driver-like head movement can be caused in the occupant, so that the motion sickness of the passenger can be reduced. In addition, since the occupant actively performs the driver-like head movement, there is little discomfort or discomfort given to the occupant, and the effect of reducing motion sickness is high.
According to the second aspect of the present invention, the driver can induce a driver-like head movement by pushing a part of the body located on the centrifugal side of the occupant during turning. Further, since the passenger is not stimulated when going straight, there is little discomfort or discomfort given to the passenger.
According to the third invention, at the time of turning, a part of the body positioned on the occupant's distal side can be pushed by inflating the air pack positioned on the occupant's distal side. Further, since the occupant is not restrained, there is little discomfort or discomfort to the occupant.
According to the fourth invention, at the time of turning, by pushing one or a combination of two or more of the thigh, the buttocks, the waist, the back located on the distal side of the occupant, the occupant is subjected to the driver-like head movement. Can be triggered.
According to the fifth aspect of the present invention, when turning, by supporting a part of the body located on the centrifugal side of the occupant from the side, the occupant can straddle against the centrifugal force. Can induce exercise. Further, since the passenger is not stimulated when going straight, there is little discomfort or discomfort given to the passenger.
According to the sixth aspect of the present invention, a part of the body positioned on the occupant's distal side can be supported from the side by inflating the air pack positioned on the occupant's distal side during turning. Further, since the occupant is not restrained, there is little discomfort or discomfort to the occupant.
According to the seventh aspect of the invention, during turning, the occupant resists centrifugal force by supporting one or a combination of thighs, buttocks, hips, and torso located on the distal side of the occupant from the side. Therefore, it is possible to cause the driver to induce a driver-like head movement.
According to the eighth aspect of the invention, the center of gravity of the head moves in the centripetal direction by tilting the occupant's torso in the centripetal direction at the time of turning, so that the occupant can induce a driver-like head movement. Further, since the passenger is not stimulated when going straight, there is little discomfort or discomfort given to the passenger.
According to the ninth aspect of the present invention, the occupant's torso can be tilted in the centripetal direction by inflating the air pack located on the centrifugal side of the occupant during turning. Further, since the occupant is not restrained, there is little discomfort or discomfort to the occupant.
According to the tenth invention, at the time of turning, the occupant actively floats a part of the body by giving a stimulus by a pain sensation to the part of the body located on the distal side of the occupant, so that the torso moves in the centripetal direction. The center of gravity of the head is tilted and moves in the centripetal direction, so that the driver can induce a driver-like head movement.
According to the eleventh aspect of the invention, the driver-like head movement can be induced in the occupant and the driver-like head movement can be caused in the occupant. In addition, since the occupant actively performs the driver-like head movement, there is little discomfort or discomfort given to the occupant, and the effect of reducing motion sickness is high.
According to the twelfth aspect of the present invention, the driver can induce a driver-like head movement by pushing a part of the body located on the centrifugal side of the occupant during turning. Further, since the passenger is not stimulated when going straight, there is little discomfort or discomfort given to the passenger.
According to the thirteenth invention, at the time of turning, by pressing one or a combination of two or more of the thigh, the buttocks, the waist, and the back that are located on the distal side of the occupant, Can be triggered.
According to the fourteenth aspect of the present invention, since a part of the body located on the centrifugal side of the occupant is supported from the side during turning, the occupant can straddle against the centrifugal force. Can induce exercise. Further, since the passenger is not stimulated when going straight, there is little discomfort or discomfort given to the passenger.
According to the fifteenth aspect, during turning, the occupant resists centrifugal force by supporting one or a combination of thighs, buttocks, hips, and torso located on the distal side of the occupant from the side. Therefore, it is possible to cause the driver to induce a driver-like head movement.
According to the sixteenth aspect, the center of gravity of the head moves in the centripetal direction by tilting the occupant's torso in the centripetal direction during turning, so that the occupant can induce a driver-like head movement. Further, since the passenger is not stimulated when going straight, there is little discomfort or discomfort given to the passenger.
According to the seventeenth aspect of the present invention, when turning, the occupant actively floats a part of the body by giving a stimulus by a pain sensation to the part of the body located on the distal side of the occupant, so that the torso moves in the centripetal direction The center of gravity of the head is tilted and moves in the centripetal direction, so that the driver can induce a driver-like head movement.

It is explanatory drawing of the stimulation means of the motion sickness reduction apparatus which concerns on 1st Embodiment of this invention. It is explanatory drawing of the motion sickness reduction apparatus to which the stimulation means is applied. It is explanatory drawing of the motion sickness reduction apparatus which concerns on other embodiment of this invention, Comprising: (A) is a left view, (B) is a front view. It is explanatory drawing of the motion sickness reduction apparatus which concerns on other embodiment, Comprising: (A) is a left view, (B) is a top view. It is explanatory drawing of the centrifugal side and the centripetal side. It is a graph which shows the time series change of a test participant's head roll angle and vehicle lateral acceleration, (A) is a case without a motion sickness reduction apparatus, (B) is a case with a motion sickness reduction apparatus. It is a graph which shows the head maximum roll angle when there is no motion sickness reduction apparatus of 3 test participants, and there exists. It is a block diagram of a 6-DOF motion sickness mathematical model. It is an MSI simulation result when a 30-minute excitation experiment was conducted. It is a graph which shows the result of the slalom driving | running | working on the Hard conditions of one everyday driver | operator. It is a graph which shows the MSI calculation result using the slalom driving | running | working data in a Mild condition of an everyday driver | operator. It is a graph which shows the MSI calculation result using the slalom driving | running | working data in a hard condition of an everyday driver | operator.

(principle)
Next, the principle of the present invention will be described.
The most prominent theory for motion sickness (motion sickness) is the sensory confusion theory. Usually, in the sensory confusion theory, inconsistency in sensory quantity among multisensory modalities is considered to cause intoxication. On the other hand, based on the fact that sickness is caused by single sensory information centered on the vestibular system, a motion sickness model based on sensory information and a sensory amount error in an internal model built in the brain is known. Specifically, mathematical models of motion sickness associated with head translational movements that focus on the mechanism of gravity direction estimation by the vestibular system are known (Bos, JE, Bles, W .: Theoretical considerations on canal-otolith
interaction and an observer model, Biological Cybernetics 86, pp.191-207, 2002).

The present inventor has devised a 6-DOF motion sickness mathematical model extended to 6-DOF motion including head rotation so that the motion sickness mathematical model can be used for analysis of car sickness.
The 6-DOF motion sickness mathematical model is based on the head acceleration vector and angular velocity vector.
Sick Incidence). ) And is based on the assumption that humans are estimating the direction of gravity from the vestibular system, as in the mathematical model of motion sickness. In the 6-DOF motion sickness mathematical model, the direction of gravity is estimated from head acceleration including head acceleration and head angular velocity, and the difference between this and the estimated direction of gravity based on an internal model constructed mainly from the cerebellum, etc. It is assumed that motion sickness occurs.

Specifically, the 6-DOF motion sickness mathematical model is represented by the block diagram shown in FIG. In FIG. 8, a vector f is an acceleration due to the resultant force of the gravity of the head and inertial force as seen from the head coordinate system, and is expressed by the following equation (1). Here, vector a is acceleration due to inertial force, and vector g is gravitational acceleration.
The vector ω is the rotational angular velocity in the head coordinates.

OTO corresponds to an otolith that senses acceleration f, and <OTO> is its internal model, both of which are assumed to be a unit matrix from its response characteristics. SCC corresponds to a semicircular canal that senses the rotational angular velocity ω, and <SCC> is its internal model, expressed as Equations 2 and 3, respectively (Haslwanter, T., Jaeger R., Mayr, S ., Fetter, M., (2000). Three
Dimensional Eye Movement Responses to Off-Vertical Axis Rotations in
human. Experimental Brain Research., 134 (1), pp. 96-106.
Here, τ _d and τ _a are time constants.

LP is an update rule for detecting the direction of gravity from sensor signals detected by the otolith device OTO and the semicircular canal SCC.
<LP> is an internal model of the update rule LP and has the same time constant as the update rule LP.

The vectors a _s , ω _s , and v _s represent translational acceleration, rotational angular velocity, and vertical sensory amount, respectively. Scalars K _a and K _ω are estimated error rates of head acceleration and angular velocity in estimation of vehicle-human system dynamics and kinematics by centrifugal copying or the like. The vectors Δa, Δω, and Δv are translational acceleration, rotational angular velocity, vertical sensory amount and error amount estimated by the internal model, respectively, and after applying integration that can be interpreted as a kind of learning process, each gain K _ac , Multiply K _ωc and K _vc to return positively in front of the sensory organ of the internal model. Further, Δv of the estimation error is evaluated as MSI by receiving a second-order integral with a long time constant via a quadratic Hill function.

The present inventor performed MSI simulation at the time of lateral excitation using the 6-DOF motion sickness mathematical model.
In this simulation, a person fixed on the shaking table was vibrated in a sine wave shape with a peak acceleration of 4 m / s ² and a frequency of 0.26 Hz. The movement of the human head during vibration is assumed to be a sine wave having the same period and the same phase as the vibration table, and three levels of +5 deg, 0 deg, and -5 deg are provided for the head tilt condition. The positive amplitude (+5 deg) is a head movement in the direction opposite to that of the shaking table, simulating the driver's head movement. The negative amplitude (-5deg) is the head movement in the direction of the shaking table, which simulates the passenger's head movement.
As shown in FIG. 9, the MSI decreased as the head was tilted in the positive direction (+5 deg). This is consistent with the trend of less driver sickness than passengers.

Next, the vehicle motion and the head motion of the driver and passengers when slalom traveling was performed using an actual vehicle were measured.
A small passenger car was used as the experimental vehicle. In the test run, the slalom run was performed three times for each condition on a wide two-lane road. In the experiment, the head acceleration, head angle, vehicle acceleration, and vehicle angle of the driver and passenger are measured. The head acceleration and head angle of the driver and passengers were measured with a small wireless acceleration sensor (WAA-001 wireless technology) and gyro sensor (InertiaCube2 INTER SENSE) attached to the cap. Vehicle acceleration and vehicle angle were measured by a vehicle data measurement sensor (manufactured by MTi-G Xsense). The sampling time of the head acceleration sensor is 250 msec, and the sampling time of the gyro sensor is 10 msec. The sampling time for vehicle acceleration and vehicle angle is 10 msec. The vehicle data measurement sensor was attached to the flat part of the vehicle as close to the driver as possible. These sensor measurements were recorded on a laptop computer in the back seat. Participants were 8 male drivers with informed consent, 4 of whom were daily drivers (23-24 years old, 3 people of 38 years old) and 4 were non-daily drivers (22 ~ 23 years old). Slalom traveling was performed under the following two conditions.
Mild condition: Pylon spacing 20m, speed 30km / h
Hard condition: Pylon spacing 15m, speed 40km / h

In three trials of slalom driving, we selected and analyzed the measurement results that can be judged to be relatively accurate with little drift in the driver's head angle measurement results. As shown in FIG. 10, the driver's head roll angle is opposite in phase to the vehicle roll angle, and from here the driver may tilt his head in the turning direction (centric direction) during slalom traveling. Recognize. The tilt timing and the tilting method are close to the waveform of the vehicle lateral acceleration and the roll angle of the vehicle body during slalom. On the other hand, the passenger had a tendency that the head roll angle was in phase with the vehicle roll angle, and the head was swung by lateral acceleration.
The same tendency was observed under the Hard condition, but the acceleration and body roll increased compared to the Mild condition, so the driver tilted his head more to maintain his posture. From this, it can be said that the driver holds the posture by tilting the head according to the body roll and the lateral acceleration. The passenger's head was shaken as much as the Hard condition.

The MSI associated with the head movements of the driver and passengers in the slalom running experiment was calculated using the 6-DOF motion sickness mathematical model. The inputs to the 6-DOF motion sickness mathematical model were head acceleration and angular velocity in head coordinates, and vehicle acceleration, vehicle angular velocity, driver head angular velocity, and passenger head angular velocity measured in the experiment were used. At this time, the following head movement conditions were set as virtual head movements based on the measured head data.
(1) Driver condition: driver's head movement measured in experiment (2) Reverse driver condition: driver's head movement measured in experiment opposite to head movement (3) Head vertical Condition: Keep the head in a vertical state (4) Passenger condition: Passenger head movement measured in the experiment (5) Reverse passenger condition: Reverse to the head movement of the passenger measured in the experiment Directional head movement
(6) Vehicle movement conditions: fixed to the vehicle and the same head movement as the vehicle (7) Reverse vehicle movement conditions: Head movement with the roll of the vehicle movement conditions reversed

11 and 12 show the relationship between the MSI peak and the maximum head roll angle for each head movement condition under the Mild condition and the Hard condition, respectively. The maximum roll angle of the head took an average peak value considering the phase and waveform. When comparing the driver condition with the passenger condition, the MSI of the driver condition was smaller. Also, the head in the curve turning direction (centrecent direction) compared to the MSI of the head tilt condition (passenger condition, reverse driver condition, vehicle movement condition) in the direction opposite to the curve turning direction (centrifugal direction) The MSI for the tilt conditions (driver conditions, reverse passenger conditions, reverse vehicle motion conditions) was smaller.
In addition, compared to the Mild condition, the driver moves the head greatly in the Hard condition, but in the Hard condition, the difference between the MSI in the driver condition and the MSI in the reverse driver condition is small. This is because there is room in the Mild condition, and the driver can perform reliable head movement and MSI can be greatly reduced. However, in the Hard condition, the difficulty of driving itself is high, so appropriate head movement can be realized. Probably not.

As described above, in the MSI calculation result by the head movement obtained in the actual vehicle, the driver's MSI value was smaller than that of the passenger. This is consistent with the trend of less driver sickness. From this, it can be said that head tilting in the centripetal direction (hereinafter referred to as driver head movement) performed by the driver has an effect of reducing motion sickness.
Therefore, it can be said that motion sickness can be reduced by inducing a head movement similar to the driver's head movement (hereinafter referred to as a driver-like head movement) also to the passenger. In the present invention, the driver-like head movement includes the same head movement as the driver head movement, and also includes the head movement in which the passenger does not tilt the head in the centrifugal direction at the time of turning of the vehicle. It is a concept.

Next, an embodiment of the present invention will be described with reference to the drawings.
Based on the above results, the present inventor has devised a motion sickness reduction device that induces a driver-like head movement to a vehicle occupant, for example, a vehicle passenger.
The “vehicle” described in the present specification and claims includes not only vehicles such as private cars, buses, trucks, but also large vehicles such as trains, ships, amusement parks, driving simulators, and the like. Hereinafter, an embodiment applied to a vehicle will be described.

(First embodiment)
The motion sickness reduction apparatus A according to the first embodiment of the present invention provides a stimulus for inducing a driver-like head movement to the occupant by pushing a part of the body located on the occupant's distal side when the vehicle turns. The stimulation means 1 to give is provided. Here, the centrifugal side means a side far from the turning center of the vehicle in the vehicle or the occupant as shown in FIG. Moreover, the centripetal side means the side close to the turning center of the vehicle in the vehicle or the occupant.

  As shown in FIG. 1, the stimulation means 1 includes a pair of air packs 10, 10 and an air tank 20 that is an air supply source that supplies air to the air packs 10, 10. , 10 and the air tank 20 are connected via a trifurcated pipe 30. The pair of air packs 10 and 10 are inserted on the left and right of the cushion seat 40 laid on the seat surface of the vehicle seat.

A regulator 31 for reducing the pressure of the compressed air supplied from the air tank 20 is attached to a portion of the pipe 30 connected to the air tank 20. Further, a control valve 32 that allows air supplied from the air tank 20 to flow into and out of the air pack 10 is attached to a portion of the pipe 30 that is connected to the air packs 10 and 10. Further, a control device 33 is connected to the control valve 32 so that the timing and amount of air supplied to the air pack 10 can be controlled.
In the present embodiment, the air packs 10 and 10 are rectangular, and the dimensions when the air is introduced are 120 mm wide, 370 mm long, and 50 mm thick. The operating pressure of the air packs 10, 10 is constant at 0.05 MPa. Furthermore, from the result of investigating the time that the experiment participant determines to be the most natural in the preliminary experiment, the expansion time and the air discharge time of the air packs 10 and 10 are each 2 seconds.

As shown in FIG. 2, the cushion seat 40 in which the pair of air packs 10, 10 of the stimulation means 1 is inserted is laid on the seat surface of the seat S on which the passenger C sits. Specifically, the pair of air packs 10 and 10 are provided at positions laid on the left and right thighs and buttocks of the occupant C so that the longitudinal direction thereof is parallel to the side surface of the seating surface.
The air packs 10 and 10 may be inserted directly into the seating surface of the seat S in addition to being inserted into the cushion seat 40.

Since the motion sickness reducing apparatus A has the above-described configuration, when the vehicle turns, by supplying air to the air pack 10 located on the distal side of the vehicle and inflating it, the thigh located on the distal side of the passenger C And the buttocks can be pushed upward. Therefore, it is possible to cause the occupant C to induce a driver-like head movement. As a result, the passenger can also make the driver's head movement similar to that of the driver, so that the passenger's motion sickness can be reduced.
In addition, since the occupant C actively performs the driver-like head movement, there is little discomfort and discomfort given to the occupant C, and the effect of reducing motion sickness is high.
Further, since the occupant C is not restrained and the occupant C is not stimulated when going straight, there is little discomfort or discomfort to the occupant C.
Note that the thigh and buttocks of the occupant C need not be lifted even when pushed upward by the air pack 10. Further, it is not necessary for the occupant's C torso to be tilted in the centripetal direction. However, the occupant C tends to actively tilt the head in the centripetal direction by receiving such pressure, and the driver-like head movement can be induced by such stimulation.

In the said 1st Embodiment, although the air packs 10 and 10 were provided in the position laid by the left and right thighs and buttocks of the passenger | crew C, the length and position of the air packs 10 and 10 are adjusted, 10 may be provided at a position laid only on the left and right thighs of the occupant C, or may be provided at a position laid only on the left and right buttocks of the occupant C. Further, the air packs 10 and 10 may be provided at positions where the occupant C is placed on the left and right of the waist and back, and they may be pushed forward. That is, the air pack 10 may be provided at a position laid on any of the thigh, buttocks, waist, and back of the occupant C, or may be provided at a position laid on any combination thereof. When the position where the air pack 10 is provided covers a wide range, two or more pairs of air packs 10 may be provided.
Even in this case, the driver-like head movement can be induced in the occupant C by pushing a part of the body located on the distal side of the occupant C when the vehicle turns.

(Second Embodiment)
The motion sickness reduction apparatus B according to the second embodiment of the present invention supports the driver-like head movement to the occupant C by supporting a part of the body located on the distal side of the occupant C from the side when the vehicle turns. Stimulation means 2 for providing a stimulus for inducing the above is provided.
The stimulation means 2 according to this embodiment has substantially the same configuration as that of the stimulation means 1 according to the first embodiment (see FIG. 1), but the pair of air packs 10 and 10 includes the thigh and buttocks of the occupant C. It is provided in the position which supports from the side. That is, the distance between the pair of air packs 10, 10 of the stimulation means 2 is slightly wider than the distance between the pair of air packs 10, 10 of the stimulation means 1.

Since the motion sickness reduction device B has the above-described configuration, when the vehicle turns, the thigh located on the distal side of the occupant C is supplied by inflating the air pack 10 located on the distal side of the vehicle. And can support the buttocks from the side. Therefore, since the occupant C can straddle against centrifugal force like a bucket seat, the occupant C can be caused to induce a driver-like head movement. As a result, the passenger can also make the driver's head movement similar to that of the driver, so that the passenger's motion sickness can be reduced.
In addition, since the occupant C actively performs the driver-like head movement, there is little discomfort and discomfort given to the occupant C, and the effect of reducing motion sickness is high.
Further, since the occupant C is not restrained and the occupant C is not stimulated when going straight, there is little discomfort or discomfort to the occupant C.

In the said 2nd Embodiment, although the air packs 10 and 10 were provided in the position which supports a passenger | crew's C thigh and buttocks from the side, the length and position of the air packs 10 and 10 are adjusted, 10 may be provided at a position where only the thigh of the occupant C is supported from the side, or may be provided at a position where only the buttocks of the occupant C are supported from the side. Moreover, you may provide the air packs 10 and 10 in the position which supports the passenger | crew's C waist | hip | lumbar and torso from a side. That is, the air pack 10 may be provided at a position where any one of the thigh, buttocks, waist, and trunk of the occupant C is supported from the side, or any combination thereof may be provided at the position where the combination is supported from the side. May be. When the position where the air pack 10 is provided covers a wide range, two or more pairs of air packs 10 may be provided.
Even if it does in this way, since the passenger | crew C can straddle against a centrifugal force by supporting a part of the body located in the centrifugal side of the passenger | crew C from the side at the time of turning of a vehicle, driving | operating to the passenger | crew C Person-like head movement can be induced.

As shown in FIG. 3, instead of the air pack 10 used for the stimulating means 2, a stick-shaped protruding member 50 whose height protruding from the surface of the seat S can be changed may be used. More specifically, a pair of projecting members 50, 50 are provided on the sides of the thigh and buttocks of the occupant C, and when the vehicle turns, the projecting member 50 located on the distal side of the vehicle is projected to increase the height. Make it high.
Further, as shown in FIG. 4, the pair of projecting members 50, 50 are provided on the side of the body of the occupant C, and when the vehicle turns, the projecting height of the projecting member 50 located on the centrifugal side of the vehicle is increased. You may make it high.
Even if it does in this way, since the passenger | crew C can straddle against a centrifugal force by supporting a part of the body located in the centrifugal side of the passenger | crew C from the side at the time of turning of a vehicle, driving | operating to the passenger | crew C Person-like head movement can be induced.

(Third embodiment)
The motion sickness reduction apparatus C according to the third embodiment of the present invention provides a stimulus that induces a driver-like head movement to the occupant C by tilting the trunk of the occupant C in a centripetal direction when the vehicle turns. Means 3 are provided.
The stimulation means 3 according to this embodiment has substantially the same configuration as the stimulation means 1 according to the first embodiment (see FIG. 1), but the thickness of the air pack 10 when air is supplied is the stimulation means 1. It is thicker than the air pack 10. Therefore, when the vehicle turns, by supplying air to the air pack 10 located on the centrifugal side of the vehicle and inflating, the thigh and the buttocks located on the centrifugal side of the occupant C are lifted upward, thereby The trunk of the occupant C is tilted in the centripetal direction.

Since the motion sickness reducing device C has the above-described configuration, the body of the occupant C is tilted in the centripetal direction by supplying air to the air pack 10 located on the centrifugal side of the vehicle and inflating it when the vehicle turns. Can do. Therefore, since the center of gravity of the head of the occupant C moves in the centripetal direction, the occupant C can be caused to induce a driver-like head movement. As a result, the passenger can also make the driver's head movement similar to that of the driver, so that the passenger's motion sickness can be reduced.
In addition, since the occupant C actively performs the driver-like head movement, there is little discomfort and discomfort given to the occupant C, and the effect of reducing motion sickness is high.
Further, since the occupant C is not restrained and the occupant C is not stimulated when going straight, there is little discomfort or discomfort to the occupant C.

(Fourth embodiment)
The motion sickness reduction device D according to the fourth embodiment of the present invention provides a driver-like head to the occupant C by giving a painful stimulus to a part of the body located on the distal side of the occupant C when the vehicle turns. Stimulation means 4 is provided that provides a stimulus that induces exercise.
The stimulation means 4 according to the present embodiment is a means for giving stimulation by pain sensation to, for example, a thigh and a buttocks located on the distal side of the occupant C when the vehicle turns. Specifically, instead of the air pack 10 in the stimulation means 1 according to the first embodiment, a pair of electric pads are inserted on the left and right sides of the cushion sheet 40. A bar such as a needle that can protrude from the surface of the seat S may be used.

  Since the motion sickness reduction device D has the above-described configuration, the thigh and the buttocks located on the distal side of the occupant C by an electric pad located on the distal side of the vehicle or by a rod such as a needle when the vehicle turns. By giving painful stimulation to the occupant, the occupant C actively floats the thighs and buttocks to which the stimulation is applied, so that the torso tilts in the centripetal direction and the center of gravity of the head moves in the centripetal direction. The driver C can be caused to induce a driver-like head movement. As a result, the passenger can also make the driver's head movement similar to that of the driver, so that the passenger's motion sickness can be reduced.

(test)
Below, the verification test of the effect of the motion sickness reduction apparatus A which concerns on the said 1st Embodiment is demonstrated.
The test was performed by running only on a left turn curve with a radius of 12 m. At this time, the curve approach speed was 40 km / h. Participants were seated in the passenger seat and experienced 6 runs of 2 patterns with and without motion sickness reduction devices. The operation of the air packs 10 and 10 was performed by the operator of the rear seat opening and closing the control valve 32 in accordance with the steering of the driver. The head acceleration and head angle of the participants were measured using a small wireless acceleration sensor (WAA-001 wireless technology) and a gyro sensor (InertiaCube2 INTER SENSE) attached to the cap. Vehicle acceleration and vehicle angle were measured by a vehicle data measurement sensor (manufactured by MTi-G Xsense). The participants were three men from 22 to 24 years of age who had informed consent.

  As a result of the test, as shown in FIG. 6, the vehicle lateral acceleration of the same degree is measured without the motion sickness reduction device (A) and with (B). It was found that the head roll angle was suppressed to be smaller in the case with the disease reducing device (B).

  In addition, as shown in FIG. 7, it was found that the maximum roll angle of the head was kept small in the other test participants with the motion sickness reduction device. This is thought to be because the swelling of the air packs supported the participants' thighs, and the head inclination in the centrifugal direction was suppressed. From this, according to the 6-DOF motion sickness mathematical model, it can be inferred that with the motion sickness reduction device, MSI becomes smaller and motion sickness is reduced. In addition, from the experiment participants, there was no sense of incongruity with the motion sickness reducing device A, and the opinion that the motion sickness reducing device A would support the body and stabilize the posture.

  The motion sickness reduction apparatus according to the present invention can be used to reduce motion sickness in large vehicles such as trains, ships, and amusement parks, as well as vehicles such as private cars, buses, and trucks.

DESCRIPTION OF SYMBOLS 10 Air pack 20 Air tank 30 Pipe 31 Regulator 32 Control valve 33 Control apparatus 40 Cushion seat

Claims (17)

An apparatus for reducing motion sickness, characterized by comprising stimulation means for giving a stimulus for inducing a driver-like head movement to an occupant of a vehicle. 2. The motion sickness reduction apparatus according to claim 1, wherein the stimulation means pushes a part of the body located on the distal side of the occupant when the vehicle turns. The stimulation means includes a plurality of air packs, an air supply source that supplies air to the plurality of air packs, and a control device that controls supply of air to the plurality of air packs,
The motion sickness reduction device according to claim 2, wherein the plurality of air packs are provided at positions laid on a part of a body located on the left and right of the occupant. 4. The motion sickness reduction apparatus according to claim 2, wherein a part of the body of the occupant is one or a combination of two or more of a thigh, a buttock, a waist, and a back of the occupant. 2. The motion sickness reduction apparatus according to claim 1, wherein the stimulation means supports a part of a body located on the distal side of the occupant from the side when the vehicle turns. The stimulation means includes a plurality of air packs, an air supply source that supplies air to the plurality of air packs, and a control device that controls supply of air to the plurality of air packs,
6. The motion sickness reduction apparatus according to claim 5, wherein the plurality of air packs are provided at positions that support a part of the body of the occupant from the side. The motion sickness reduction apparatus according to claim 5 or 6, wherein a part of the occupant's body is one or a combination of two or more of the occupant's thigh, buttocks, hips, and trunk. 2. The motion sickness reduction apparatus according to claim 1, wherein the stimulation means tilts the occupant's torso in a centripetal direction when the vehicle turns. The stimulation means includes a plurality of air packs, an air supply source that supplies air to the plurality of air packs, and a control device that controls supply of air to the plurality of air packs,
9. The motion sickness reduction apparatus according to claim 8, wherein the plurality of air packs are provided at positions laid on a part of a body located on the left and right of the occupant. 2. The motion sickness reduction apparatus according to claim 1, wherein the stimulating means gives a stimulus by pain to a part of the body located on the distal side of the occupant when the vehicle turns. A method for reducing motion sickness, characterized in that a driver is given a stimulus that induces a driver-like head movement. 12. The method for reducing motion sickness according to claim 11, wherein a part of a body located on a centrifugal side of the occupant is pushed when the vehicle turns. The method for reducing motion sickness according to claim 12, wherein a part of the occupant's body is one of thighs, buttocks, hips, and back of the occupant, or a combination of two or more. 12. The method for reducing motion sickness according to claim 11, wherein a part of the body located on the distal side of the occupant is supported from the side when the vehicle turns. 15. The method for reducing motion sickness according to claim 14, wherein the part of the body of the occupant is one or a combination of two or more of the thigh, buttocks, waist, and trunk of the occupant. 12. The method for reducing motion sickness according to claim 11, wherein the trunk of the occupant is tilted in a centripetal direction when the vehicle turns. 12. The motion sickness reduction method according to claim 11, wherein a stimulus by pain is given to a part of the body located on the distal side of the occupant when the vehicle turns.