JP5461861B2 - Economy class syndrome prevention device - Google Patents

Description

  The present invention relates to an economy class syndrome prevention apparatus that prevents a lower limb circulation disorder that may occur when a user sits in a tight seat in an economy class of an aircraft for several hours or more.

  When sitting on an aircraft seat for a long time, it is known that poor blood circulation occurs on the back side of the thigh, and rarely blood clots (venous thrombi) form in the leg veins. After that, when standing, the thrombus moves in the bloodstream, and as described above, there is a possibility of pulmonary embolism. It was called “economy class syndrome” because of the high incidence of users in the first economy class in 1968 when this thrombosis was first reported.

  Due to the relationship between lower limb veins and pulmonary embolism, this symptom can occur not only when sitting for more than a few hours, but also after surgery where the feet cannot be moved for an extended period of time. . Even in a sudden pulmonary embolism, a thrombus in the deep vein that occurs at this time, that is, a blood clot, is rarely released, and when the blood clots come off and passes through the right ventricle and then reaches the lungs The pulmonary artery may become clogged and cause pulmonary embolism. In such cases, when breathing difficulty, decreased cardiac function, or blood clots enter the blood vessels of the brain, it can lead to stroke and eventually lead to life threatening such as death. The present invention relates to an economy class syndrome prevention apparatus for preventing not only the above symptoms but also other accompanying symptoms.

Conventionally, a device described in the following document has been proposed as a footrest device for a vehicle.
The above-mentioned economy class syndrome is not limited to an aircraft, but may be caused in the same manner, for example, when a long-distance truck driver drives a vehicle for a long time.

  The above symptoms can also occur after surgery where the feet cannot be moved in bed for a long time. The reason for this is that venous blood does not move during the operation, so thrombosis is likely to occur. About 30% of pulmonary thrombosis that suddenly develops is said to have died, and about 1800 people died in 2006. Yes.

This technique is projected vibration projection from a number of holes provided in the footplate of Futtore be sampled device, fixed to the holding plate base end portion of the vibration projections at the back side of the tread plate, a switch is provided on the top of the footboard, It is known that when this switch is turned on with a foot, the holding plate is vibrated to vibrate each vibration protrusion, thereby giving a massage effect to the sole (see, for example, Patent Document 1). With the Futtore be sampled apparatus of this publication, the economy class syndrome in the vehicle is also considered to be suppressed or reduced.

Further, the lower limb vibration device such as Futtore be sampled apparatus of this publication, not only the vehicle but, long train seat seated is required, provided the aircraft seat, if the driver-passenger to rise to vibration due to its intention Similarly, it is thought that economy class syndrome can be suppressed.

JP-A-9-226431

However, the vehicle Futtore be sampled apparatus disclosed in the above publication, it is necessary to press the switch provided on the top of the footboard for vibrating the vibrating projections.

When the driver is willing to give the soles just a comfortable massage feeling, such switch activation is appropriate because the vibration projections will never vibrate if massage is not desired, but the economy described above Since the class syndrome occurs unknowingly for the driver / passenger, and the driver / passenger can hardly always have sufficient prior knowledge about the risk of thrombus generation causing the economy class syndrome, the above publication 's Futtore be sampled device for a vehicle, it is effective as a pleasant massaging device, as the economy class syndrome prevention device was not substantially effective.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an economy class syndrome prevention device that is easy to operate and has an excellent thrombus prevention effect.

  The economy class syndrome prevention device of the present invention is the economy class syndrome prevention device of the present invention for achieving the above object.

  Here, blood from the heart is sent by the artery and returns through the vein. The main cause of venous thrombosis is blood flow stagnation. Venous blood flow is enhanced by the action of muscle pumps and foot pumps, but the inability to move is a strong cause of blood flow stagnation.

Therefore, methods for venous return of blood stored in the lower limbs and plantar venous plexus include muscle pumps by stretching and contracting leg muscles, foot pumps by loading on plantar venous plexus, and respiratory pumps by deep breathing .
As an example, blood that goes to the heart due to the muscle pumping action of the foot is because the vibration stimulates the muscles or skin of the lower limbs, and the “axon reflex phenomenon”, that is, the impulse generated in the sensory nerve by the stimulation. Phenomenon that is transmitted through the other branch of the afferent nerve to the skin blood vessel in the opposite direction, vasodilator is released, dilates the blood vessel, or "shear stress (shear stress) effect on vascular endothelial cells by vibration", That is, nitric oxide (NO) production in vascular endothelial cells due to vibration is increased, and blood flow is improved by the effect of adjacent blood vessel smooth muscle cells dilating blood vessels and increasing blood flow. it is conceivable that.

  The economy class syndrome prevention apparatus of the present invention for achieving the above object improves the blood flow in the development in the economy class syndrome prevention apparatus that acts as a muscle pump and a foot pump as a method for promoting venous return. The method is a method in which blood stored in the lower limbs and plantar venous plexus is circulated through the veins by the principle of expanding blood vessels by stimulation of lower limb muscles by elliptic vibration and increasing blood flow.

  This is a system that promotes venous return by using a muscle pump action and a foot pump action similar to a walking load.

(1) and the horizontal direction and the vibration source to the elliptical vibration can be generated with a vertical vibration component, and a control means for controlling the horizontal and the vibration in the vertical of said vibration source in accordance with a predetermined vibration frequency, the comprising a power supply unit for the vibration source, and means for transmitting to the sole portion or leg of the user the vibration of the vibration source, the vibration source is composed of a rotor and which the opposing stator The vibrator is resonantly oscillated according to the vibration frequency, and the resonant vibration is caused by the eccentricity of the inner diameter of the stator and the outer diameter of the rotor. This is due to the radial (radial) direction vibration that occurs due to the center of the rotor and the stator not matching, and the center position in the rotational axis direction of the rotor and the stator being shifted. It includes thrust (axial) vibration generated by

  (2) In the economy class syndrome prevention device according to the above (1), the horizontal and vertical vibrations can be controlled without phase-controlling the vertical vibration direction component and the horizontal vibration direction component with only one or more vibrators. It has a load means for accelerating the expansion and contraction of the muscle by the elliptical vibration having the component.

  (3) In the economy class syndrome prevention apparatus according to (2), the apparatus has a load means for promoting pseudo walking to the sole by elliptic vibration.

  (4) In the economy class syndrome prevention apparatus according to (1), the vibration method is characterized by elliptical vibration by pulse driving by four-phase one-phase excitation.

  (5) In the economy class syndrome prevention apparatus according to the above (4), the frequency of the pulse drive of the elliptical vibration of the drive system is 50 to 300 Hz.

  (6) In the economy class syndrome prevention device according to (1), the vibration source is attached to the base portion or the lid portion in the longitudinal direction.

  (7) In the economy class syndrome prevention apparatus according to the above (1), the vibration source is attached to the base portion or the lid portion in a direction perpendicular to the longitudinal direction or in a short direction.

  (8) In the economy class syndrome prevention device according to (1), the rotation direction of the vibration source may be clockwise or counterclockwise.

  (9) In the economy class syndrome prevention device according to (1), the pulse applied to the excitation source is changed by changing the ratio of the time of output 1 (H level) to the time of output 0 (L level). In the pulse repetition period of output 1 and output 0, the reciprocal of the period is set to freely control the frequency of the vibrator.

  (10) In the economy class syndrome prevention apparatus described in (1) above, the ratio of the time of output 1 (H level) and the time of output 0 (L level) is changed in the frequency of the excitation source in the pulse period. In this case, however, the duty ratio between the H level and the L level is set to 50% without changing the frequency so that the battery can be driven and can be charged by the AC adapter, and the control is performed with power saving.

  (11) In the economy class syndrome prevention apparatus described in (1) above, an accelerometer type sensor, an eddy current sensor, or a mutual sensor capable of simultaneously measuring vibration components in the horizontal direction and the vertical direction of the vibration source in two directions. The frequency or phase difference can be measured by a plane figure or a Lissajous figure obtained by synthesizing two simple vibrations orthogonal to each other.

  (12) In the economy class syndrome prevention device according to (1), the base portion or the lid portion is provided with an electromagnetic shield subjected to metal coating and metal plating.

  (13) In the economy class syndrome prevention device according to (1), a metal substrate for a power switch, an AC adapter, and a charging adapter is provided.

  (14) In the economy class syndrome prevention device according to (1), the configuration of the vibration control device of the vibration exciter includes a control microcomputer, a drive IC for driving the vibration exciter, and a drive transistor comprising a transistor array. It is characterized by comprising an array and a vibrator.

  (15) In the economy class syndrome prevention device described in (14) above, the configuration of the vibration control device of the vibration exciter includes a frequency adjustment volume, a control microcomputer, a drive transistor array composed of a transistor array, and a drive IC. The drive IC function is replaced by wear, the drive IC is deleted, and a vibration exciter is used.

  The elliptical vibration referred to in the present invention refers to vibration that gives an optimal phase difference between horizontal vibration and vertical vibration. By setting the vertical amplitude to the minimum necessary and giving the horizontal amplitude, the movement of the object (dancing) is controlled. The vibration that can be reduced, improves the reflux speed, and enables smooth reflux with low noise.

As described above in detail, according to the present invention, the following effects can be obtained.
(A) It is possible to improve the blood flow returning to the heart by obtaining a foot pump or muscle pump action by elliptic vibration having horizontal and vertical vibration components for venous return from the sole of the lower limb to the stool. it can.
This can prevent thrombus in the deep veins of the lower limbs.
(B) While wearing an economy class syndrome prevention device and exercising a part of the body (plantar, lower limb muscle, seat), more effective economy class syndrome can be prevented.

It is a functional block diagram of Example 1 of the economy class syndrome prevention apparatus of this invention. It is a figure which shows the relationship between a leg vein and pulmonary embolism. It is explanatory drawing which accelerates | stimulates venous return by adding an elliptical vibration to skin. It is explanatory drawing of a venous valve and the flow of blood. It is explanatory drawing of the circuit diagram of Example 1 of the economy class syndrome prevention apparatus of this invention. 2 is a functional block diagram of Embodiment 1. FIG. 3 is a circuit diagram of a drive unit of the vibrator 20. FIG. It is explanatory drawing which shows the relationship between the input pulse signal of a 4 phase 1 phase excitation system, and an excitation signal. It is explanatory drawing which shows the structure of a vibrator. It is a principle diagram of the vibration of a vibrator. It is an operation algorithm of a vibrator. It is a figure which shows the production | generation method of a pulse. It is explanatory drawing of an energy saving drive system so that a battery can be used for a long time in a 4 phase 1 phase excitation system. It is explanatory drawing which shows the relationship between the duty ratio of current consumption, and a vibration speed. It is explanatory drawing which shows the flowchart of A / D conversion of a control microcomputer, and a digital output. It is explanatory drawing which shows the flowchart of the setting of the frequency of a control microcomputer, and a duty. It is explanatory drawing of the accelerometer type vibrometer used for the vibration measurement of the vibrator. It is a figure which shows the relationship between a vibration speed and a displacement. It is explanatory drawing of the method of measuring the vibration of the vertical direction of a base by the probe of this accelerometer type vibrometer, a horizontal X-axis direction, and a horizontal Y-axis direction. FIG. 3 is a layout diagram of the first embodiment. It is explanatory drawing which shows the result of having measured the vibration amount of the vertical Z-axis direction in the cover part of Example 1. FIG. It is explanatory drawing which showed the result of having measured the vibration amount of the horizontal X-axis direction and horizontal Y-axis direction in each base part of Example 1. FIG. It is explanatory drawing which shows the result of having measured the vibration amount of the horizontal Y-axis direction and the vertical Z-axis direction in the cross section AA part of the center part of a vibrator of Example 1, and a peripheral part. FIG. 6 is an explanatory diagram of a circuit diagram of Embodiment 2. FIG. 6 is a circuit diagram of a power supply unit according to a second embodiment. It is explanatory drawing which shows the detection method of the vibration detection apparatus by an eddy current type displacement sensor. It is a figure of the experimental result which shows the relationship between the vibration measurement distance and output voltage in this invention of the vibration detection apparatus by an eddy current type displacement sensor. It is a figure which shows the vibration waveform of an eddy current displacement sensor when a rectangular wave signal is pulse-driven to a vibrator. FIG. 6 is an explanatory diagram showing an arrangement according to a second embodiment. It is a figure which shows the measurement amount of the vertical vibration amount of the vertical Z-axis direction of Example 2. FIG. In Example 2, it is explanatory drawing which shows the result of having measured the vibration amount of the horizontal Y-axis direction and the vertical Z-axis direction in each part of a base. In Example 2, it is explanatory drawing which shows the result of having measured the vibration amount of the horizontal X-axis direction in each part of a base, and the vertical Z-axis direction. It is a figure explaining a Lissajous figure. It is a figure which shows the Lissajous figure when changing a phase difference when the frequency ratio is 1: 1. It is arrangement | positioning explanatory drawing which shows Example 3 which rotated the attachment position of the vibration exciter 90 degree | times. It is a figure which shows the measurement amount and vibration waveform of the amount of vertical vibrations of the vertical Z-axis direction of Example 3. It is explanatory drawing which shows the result of having measured the vibration amount of the horizontal Y-axis direction of Example 3, and the vertical Z-axis direction. It is explanatory drawing which shows the result of having measured the vibration amount of the vertical Z-axis direction when moving the position of the horizontal Y-axis of Example 3. FIG. It is a figure which shows the result of having observed the displacement of the X-axis direction of Example 3, and the displacement measurement amount of the perpendicular | vertical Z-axis direction. It is a Lissajous figure of the X-axis direction and Z-axis direction when changing the rotation direction of the vibrator in Example 3.

The present invention is to sit on a seat such as an airplane and exercise the soles of the foot, or muscles of the lower limbs, or sitting on the seat, or sitting for a long time, or after surgery where the feet cannot be moved in bed.
It was realized as an economy class syndrome prevention device that prevents thrombus by elliptic vibration.

  With reference to FIG. 1, Example 1 of the economy class syndrome prevention apparatus of this invention is demonstrated.

  FIG. 1 is a functional configuration diagram of an economy class syndrome prevention apparatus 1 according to the present invention.

  A vibration amplitude and a vibration frequency can be input from an elliptical vibration input unit 500 to the sole of a shoe 10 of a passenger boarding an aircraft. The control unit 300 controls the elliptical vibration input unit 500, and the power source unit 400 is configured to be switched between the internal battery 45 and the external power source by the battery 45 or the AC adapter 41. Further, the shoe means 10 and the vibrator output unit 200 which are arranged on the sole part to be placed on the vibrator 200 for adding the horizontal / vertical vibration components are constituted by the vibrator 20.

  As described above, the economy class symptom prevention apparatus 1 of the present invention includes the elliptical vibration input unit 500, the power supply unit 400, the control unit 300, and the vibrator output unit 200.

  The lower diagram in FIG. 1 shows that these economy class syndrome prevention devices 1 are attached to the soles of the shoes 10.

That is, in the economy class syndrome prevention device 1 of the first embodiment, in the vibration device having horizontal and vertical vibration components in the sole, lower limb, or seat, the venous return is promoted in the horizontal direction. An elliptical vibration input unit 500 for applying vibration amplitude and vibration frequency for vibrations having a vertical vibration component, control means for controlling horizontal / vertical component vibrations, and a power supply unit for a vibrator comprising a battery or an AC adapter 400. A vibration exciter that enables elliptical vibration having horizontal and vertical vibration components, and shoe means on a sole that is placed on the vibration exciter that adds horizontal and vertical vibration components. It is comprised with the economy class syndrome prevention apparatus 1 characterized by these.

  In the present invention, an example is shown in which vibration is applied to the sole, but it may be configured to apply vibration to the lower limbs or the seat.

  As shown in the structure of the veins of the human body in FIG. 2, the veins include surface veins, that is, “superficial veins”, and “deep veins” in which deep veins passing through muscles are deep. Originally slow-flowing veins are at a higher risk of clogging blood than arteries that send blood from the heart, so the worst situation can be avoided by creating two passages on the front and back. In this case, a clot may form in the superficial vein or deep vein, and in some rare cases, the clot may peel off and flow into the right ventricle and into the lungs, causing dyspnea in the pulmonary artery and causing pulmonary embolism. In particular, the heart is a cause of reduced cardiac function and the brain is a cause of stroke.

  The economy class syndrome prevention method will be described with reference to FIG.

  Fig. 3 shows the principle of the mechanism that improves blood flow. The "axon reflex effect" and the above-mentioned "shear stress effect" on vascular endothelial cells promote venous return, and even if a thrombus occurs, It is explanatory drawing which accelerates | stimulates vascular venous return by adding a vibration.

A system that drives an exciter with horizontal and vertical components of vibration and generates elliptical vibration to increase venous blood flow in the lower limbs, expand blood flow, and apply a mechanism to increase blood flow However, it is a principle to promote venous return, and even if thrombus formation occurs, the aim is to move the thrombus early from the time of a small clot thrombus.
As shown in the explanatory diagram of the venous valve and blood flow in Fig. 4, "the mechanism by which the lowered blood goes up to the heart" does not cause the blood toward the heart to flow back by the venous valve due to the pumping action of the muscles of "ashi". It has become to live.
That is, the vein is one-way, and blood returns to the heart as shown in FIG.

  However, as shown in FIG. 4 (2), when there is a backflow of deep veins, blood stays in the venous valve and causes varicose veins.

In the present invention, by generating an elliptical vibration by driving a vibrator having a horizontal vibration component and a vertical vibration component, the venous return is suppressed by compressing the foot with the vertical vibration component. Promote and improve circulation.
By vibrationally compressing the foot, excess blood accumulation is reduced and deep vein flow is facilitated.
By horizontal vibration, blood flow is promoted sequentially from the extremity of the foot to the central part of the heart to reduce depressive blood and prevent thrombus formation.
If the blood flow in the foot increases due to the elliptical vibration, the blood flow in the remote part is strongly affected, and the whole body circulatory system can be activated.

  The foot is located farthest from the heart in the body, and the blood that has flowed has to be pushed back to the heart against gravity, making it prone to poor circulation.

FIG. 5 is a circuit diagram in which Example 1 of the economy class syndrome prevention device of the present invention is arranged. It consists of a frequency adjustment volume 51.
It comprises a control microcomputer 32, a drive IC 33 for driving the vibrator, a drive transistor array 31 comprising a transistor array, and a vibrator 20.
FIG. 4 is an explanatory diagram of the power supply unit 40, which is a power supply unit 40 including two systems of an AC adapter 41 and a jack 41 ′ (not shown), a power supply voltage 5 V for the control microcomputer 32, and a power supply voltage 9 V for the vibrator 20. The three-terminal regulator 53 is a constant voltage power supply IC, and is a constant voltage power supply that changes 100V alternating current to direct current 5V of the output voltage.

In the three-terminal regulator 53, capacitors are arranged on the input side and the output side as shown in FIG.
The three-terminal regulator IC 53 has a three-terminal configuration including an input, an output, and a ground. In addition, these power supply changeover switches 52 are included.

FIG. 6 is a functional block diagram of the economy class syndrome prevention apparatus 1 according to the present invention, and shows an elliptical vibration input unit 500 including a frequency adjustment volume 51.
The control microcomputer 32 has an A / D (analog / digital) conversion 322 and a duty ratio (occupancy ratio), that is, a duty ratio of 50 or 100% in a ratio between an arbitrary pulse width of a periodic pulse train and a pulse repetition period. A / D converter 322 that can be selected, high and low pulse signal generator 321, bits A, B, C, and D are determined, and a control unit that includes a vibrator driver 31 that includes a transistor array The block 300 is configured.

  Furthermore, it is comprised from the vibrator output block 200 which consists of the vibrator 20 which has a rotor and a stator magnetic pole.

FIG. 7 shows a drive circuit for the vibrator 20. This is a circuit capable of rotating the vibrator 20 by applying excitation pulses to the input terminals of the excitation sequences A, B, C, and D in FIG.
In the circuit for energization, the signal input from the input terminal 1 to the input terminal 4 is converted and amplified by the drive unit 31 to excite each phase of the vibrator 20, and the input signal is input to the input terminal according to the excitation sequence. A high level input signal is output from 1 to the input terminal 4.
For the excitation pulse, a control microcomputer 32 (not shown) is used.
The drive circuit of the present invention is composed of a vibrator 20 and a drive unit 31.

FIG. 8 shows the relationship between the input pulse signal and the excitation signal of the four-phase / one-phase excitation method of the vibrator 20.
The horizontal axis represents time, and the vertical axis represents the input pulse, the excitation time chart sequence, and the number of excitation phases.

  As shown in FIG. 8, a rectangular pulse is generated from the pulse applied to the pulse generator 321 (see FIG. 6) of the control microcomputer 32 (see FIG. 5). Thus, the vibration exciter 20 can be rotated in the order of A → B → C → D phase.

  In this way, since excitation is performed sequentially for four phases for each phase, it will be referred to as four-phase one-phase excitation. Since this vibration exciter has little damper (attenuation) effect in the low frequency region (50 to 300 Hz), it is considered that vibration is likely to occur particularly during pulse switching.

  The structure of the vibrator 20 will be described with reference to FIG.

FIG. 9 is an explanatory diagram showing the structure of the vibrator 20.
As shown in FIG. 9, the vibrator 20 is composed of a rotor 22 obtained by processing a magnetic material into a gear shape, and a gear-shaped stator magnetic pole 21 in which an excitation coil 27 is wound around a laminated core facing the rotor 22. ing. Attracting the convex poles of the rotor 22 by the attractive force of the electromagnet makes use of the generated rotational force, and does not generate holding torque when there is no excitation.
Since the generated torque increases or decreases in response to continuous input pulses, the rotor 22 rotates while essentially vibrating. Resonance occurs when this oscillation period and the period of the input pulse are synchronized.

In this resonance frequency, low-frequency resonance occurs at 50 to 300 Hz corresponding to a frequency several times the natural frequency of the vibrator 20.
Radial (radial) direction vibration in the resonance, since the outer diameter of the inner diameter and the rotor 22 of the stator 21 is eccentric, the center of the rotor 22 and the fixed child 21 do not match, the air gap becomes uneven Magnetic attraction acts in the radial direction with the rotor 22, and a beating sound is generated in the gap between the outer diameter of the bearing 24 and the shaft box 23, and vibration is generated at the tips of the teeth of the rotor 22 and the stator 21. Or
The vibration in the thrust (axial) direction at this resonance is a vibration that occurs because the center position in the direction of the rotary shaft 28 is shifted between the rotor 22 and the stator 21, and the rotation of the vibrator 20 using the metal bearing 24. Problems arise as the child 22's dancing sound and the thrust washer 25's sliding sound.
Vibrated by such mechanical causes, the natural frequency of the components of the natural frequencies and the vibrator 20 of the rotor 22 is resonant, a resonance that occurs for resonance.

FIG. 10 is an explanatory diagram of the principle of vibration. When an object is struck with a hammer, the generated impact force is a pulse-like force, that is, a force that is very large and acts only for an extremely short time, and vibrates as shown in FIG.
Similarly, if the rotating body is rotated and stopped, for example, in an automobile, the accelerator and the brake are repeated so that the vibration exciter 20 has a low frequency such as 50 to 300 Hz as shown in FIG. The vibration will increase, and it will vibrate in the same way if you hit it with a hammer.

FIG. 11 shows an excitation sequence and operation algorithm of A → B → C → D of the excitation coil 27 of the vibrator 20.
The horizontal axis represents time, and the vertical axis represents the excitation sequence.
As described with reference to FIG. 9, in the four-phase / one-phase excitation method, when the frequency is low, it is considered that the vibration increases at a low frequency, such as a frequency of 50 to 300 Hz, as compared with the case where the frequency is high.

  FIG. 12 shows how to determine the repetition period of the period T_Time and the high pulse width H_Time when the frequency is changed from 20 Hz to 200 Hz in a pulse, that is, a waveform whose voltage changes suddenly like a digital waveform. Shows the waveform.

  The horizontal axis represents time, and the vertical axis represents input pulses.

The duty ratio (occupancy ratio) is the ratio between the arbitrary pulse width H_Time of the periodic pulse train and the pulse repetition period T_Time, as shown in FIG.
In this case, a method of obtaining a frequency of 20 Hz to 200 Hz when the basic clock is 500 μs is shown.
Here, the frequency f = 1 / T_Time [Hz] (1)

        Duty ratio (Duty) = H_Time / T_Time (2)

        Long: Long double extended floating point

vr: an abbreviation of variable Here, the extended double-precision floating point is a floating point expressed in 64 bits, in double notation in double notation in character notation, and the decimal point is not fixed. .

FIG. 13 is a graph showing a method for energy saving so that the battery 45 can be used for a long time in the four-phase one-phase excitation method.
As shown in FIG. 13, energy saving can be achieved by changing the duty ratio of current consumption 100% to a duty ratio (Duty) 50%.
However, the frequency is not changed. Here, the duty ratio (Duty) is expressed by the above equation (2).

  By changing the duty ratio in this way, current consumption can be halved.

FIG. 14 is a diagram illustrating the relationship between the duty ratio of current consumption and the vibration speed at a position above the vibrator 20 and beside the vibrator 20.
The horizontal axis represents the duty ratio (%), and the vertical axis represents the vibration speed (mm / s).
Here, the vibration speed is the slope of the displacement waveform, that is, the time derivative of the displacement.
Therefore, since the value of the vibration speed is expressed by the product of the displacement and the frequency, the vibration speed and the displacement amplitude are in a proportional relationship in an operation with a constant frequency.

From the measurement results of FIG. 14, even at a position directly above the vibrator 20 and at a position next to the vibrator 20, the vibration speed, that is, the amplitude is true of the vibrator 20 when the duty ratio is 100% to 50%. Above, it is constant at 0.3 mm / S, and is also constant at 0.7 mm / S on the side of the vibrator 20.
That is, the vibration speed and the amplitude proportional to the vibration speed have a constant value.
From this measurement result, it was possible to save current consumption by half by adopting a duty ratio of 50% for energy saving.

According to experiments, it was possible to save more than 8 hours with a lithium ion battery charger, so that it was possible to cope with a long flight time of an airplane.
That is, in the present invention, the frequency of the excitation source is changed to the H level without changing the frequency by changing the ratio of the time of output 1 (H level) to the time of output 0 (L level) in the pulse period. And by reducing the duty ratio of the L level to 50%, it was possible to save current consumption by half by driving the rechargeable battery. In addition, charging with a charger is possible with an AC adapter, enabling control with low power consumption.

FIG. 15 is an explanatory diagram showing a flowchart of A / D (analog / digital) conversion and digital output setting of the control microcomputer 32 of the present invention.
When starting, in S100, A / D conversion and digital output are set as initial settings. In S102, the frequency f (Hz) is input in the range of 10 to 300 Hz, the duty duty (%) is selected at 50% or 100%, and A / D conversion is performed.
In S104, a Hi (high) signal is output to the designated bit, but the excitation time is determined by f and Duty, and H_time (high time) at this time is calculated by Expression (3).

H_time = Duty / 100f (3)
In S106, L_time (low time) is calculated by Expression (4).
L_time = (100_Duty) / 100f (4)
Calculated by equation (4) and outputs the Low time to the designated bit (bit).
In S108, the bit to be output next is determined in the order of A → B → C → D.

Here, the terminal symbol in the flowchart is a symbol indicating the start or end of the program.
The preparation symbol is an instruction for changing the program itself, such as initialization of a routine.
The processing symbol is a symbol representing any processing function.

FIG. 16 is an explanatory diagram showing a flowchart for setting the frequency (Hz) and duty (Duty) of the control microcomputer 32 (see FIG. 5) of the present invention.
Once started, in S200, as an initialization, the clock frequency is 8 MHz, the A / D converter AN2 is used, V _SS (ground terminal) and V _DD (power supply voltage terminal) are used, and the frequency division 8 (clock frequency is changed). 8 bits (2 ⁸ = 256) timer 0 is set to 1 ms. In S202, the timer 0 is allowed to interrupt (interrupt when performing some processing and perform other processing), and the frequency (Hz) is read in S204. The duty is read in S206, and the duty ratio is selected in S208. If YES in S210, the duty ratio is 100%, and if NO in S212, the duty ratio is 50%.

In S204, the period is calculated. The calculation formula is calculated based on the formula (5).
T_time = 90 × Hz / 255 + 10 (5)
In S216, the H_time (high time) time is calculated. The calculation formula is calculated based on the formula (6).
H_time = Duty × T_time / 100 (6)
That is, in the present invention, the pulse repetition period of the output 1 and the output 0 at this time is changed by changing the ratio of the time of the output 1 (H level) and the time of the output 0 (L level). Therefore, the frequency of the vibrator can be freely controlled by setting the reciprocal of the period.
The input / output symbol is a symbol representing an input function that enables information to be processed or an output function that records processed information.
A judgment symbol is a symbol representing how to branch for a certain condition.

FIG. 17 is an explanatory diagram of the accelerometer vibrometer 110 used for vibration measurement of the vibrator 20. As the vibration meter 110, a vibration meter manufactured by Sato Corporation was used.
In FIG. 17, the vibration meter probe is indicated by 100.
The measurement frequency range is 10 Hz to 5 KHz, and the amplitude and speed (0.5 to 199.9).
mm / s) and acceleration (0.5 to 199.9 mm / s ² ) can be measured.
The resolutions are speed (0.1 mm / s) and acceleration (0.1 mm / s ² ), respectively.
Measurement is easy, but the amount of amplitude displacement is unknown, and the wave shape of vibration is also unknown.
Therefore, conversion of the measurement result described below is necessary.

  FIG. 18 shows the relationship between vibration speed and displacement. Assuming that the dynamic waveform is a sine wave, the maximum velocity amplitude V is calculated by equation (7).

V = 2 ^1/2 × effective value (7)
The amplitude x (t) is calculated by equation (8).

x (t) = Dsin (ωt + φ ₀ ) (8)
The velocity v (t) is calculated by equation (9).

  v (t) = dx / dy

= Dωcos (ωt + φ ₀ ) (9)
The maximum amplitude D is calculated by equation (10).

D = 2V / ω (10)
When the measured value is 1.0, D = 9 μm.

Where D: maximum amplitude φ ₀ : initial phase

          ω: angular frequency

                    v: Velocity amplitude

                    V: Maximum speed amplitude

FIG. 19 is an explanatory diagram of a method for measuring the vibration of the base 11 in the vertical direction, the horizontal X-axis direction, and the horizontal Y-axis direction by the probe 100 of the vibrometer 110.
Vibrations in the vertical direction, horizontal X-axis direction, and horizontal Y-axis direction are indicated by → (arrows).
The attachment method of the fixture 101 is configured such that horizontal X-axis direction vibration and horizontal Y-axis direction vibration can be separately measured by changing the direction by 90 degrees.

FIG. 20 is a plan view showing Example 1 of the economy class syndrome prevention apparatus 1.
In the economy class syndrome prevention device 1, the vibrator 20 is attached (fixed) to the sole-shaped base 11 with screws (not shown), and includes a power supply battery 45, an AC adapter jack 41, and a volume. 51, a power switch 52, a control microcomputer 32, a vibrator driver 31, and a lid 12.
The lid 12 is screwed (fixed) to the base 11 with a screw (not shown) at the hole 14. Therefore, the vibration of the vibrator 20 is configured to be transmitted to the entire base 11.

FIG. 21 is a measurement result of the amplitude (μm) in the vertical Z-axis direction when the vibrometer 110 (see FIG. 17) is attached to the lid 12, that is, in a state where vibration is applied to the sole.
From this result, it can be seen that the vertical Z-axis direction amplitude displacement amount in the central portion is 0 to 3.6 μm, and the amplitude amount is smaller than the peripheral amplitude displacement amounts of 3.6 to 7.2 μm.
In addition, the overall amplitude was a minute vibration of 0 μm to 7.2 μm.

  FIG. 22 shows the results of measurement of the amount of vibration in the horizontal Y-axis direction (μm) and the horizontal X-axis direction at each part of the base 11 with the lid 12 removed using the vibrometer 110 (see FIG. 17). It is explanatory drawing.

  From these results, the amplitude in the horizontal Y-axis direction is 0.9 to 10.8 (μm), and the amplitude is twice or more larger than the amplitude amount 0.3 to 5.4 (μm) in the horizontal X-axis direction. I understand that. Furthermore, when compared with the result of FIG. 21, it can be seen that the amplitude is larger than the state in which the lid 12 is attached.

  In actual use of the first embodiment, since the lid is used, it is necessary to further increase the amplitude displacement amount with the lid attached.

Further, in order to improve the blood circulation of the sole so that the venous blood flow is sent in the direction of the heart, the amplitude amount in the horizontal X-axis direction in the same direction as the blood circulation direction is larger in the horizontal Y-axis direction. Larger than this is desirable.
That is, it is necessary to make the amplitude amount in the horizontal X-axis direction larger than the amplitude amount in the horizontal Y-axis direction.

FIG. 23 shows the result of measuring the amplitude amounts in the horizontal Y-axis direction and the vertical Z-axis direction in the vicinity of the vibrator 20 of the base 11.
The amplitude of the horizontal Y axis in the cross section AA was 6.3 μm at the portion of the vibrator 20, and the amplitude amount was 8.1 to 9.0 μm at the outer peripheral portion of the base 11.
The amplitude in the vertical Z-axis direction is 1.8 μm at the center of the vibrator and 9.9 μm at the peripheral part, and the amplitude in the vertical Z-axis direction is larger in the peripheral part. .

As shown in FIG. 23, in Example 1, it is observed that the vibration state is elliptical vibration composed of a vibration component in the horizontal Y-axis direction and a vibration component in the vertical Z-axis direction.
However, in order to increase the amount of amplitude itself over the entire lid 12 and to improve the blood flow of the sole so that the venous blood flow is sent in the direction of the heart, the horizontal direction in the same direction as the venous blood flow direction is used. There is a need for technical improvement in which the amount of amplitude in the X-axis direction is larger than the amount of amplitude in the horizontal Y-axis direction.
Therefore, it is necessary to make the vibration displacement amount in the horizontal X-axis direction larger than the vibration displacement amount in the horizontal Y-axis direction.

A second embodiment of the economy class syndrome prevention apparatus of the present invention will be described with reference to FIG.
FIG. 24 is a circuit diagram in which Example 2 of the economy class syndrome prevention device of the present invention is arranged.
The economy class syndrome prevention apparatus according to the second embodiment includes a frequency adjustment volume 51, a switch SW52, an AC adapter 41, a charger 45, a power supply voltage _{VCC, a} control microcomputer 32, a drive transistor array 31 including a transistor array, and a vibrator. 20 or the like.
Note that the drive IC 33 used in the first embodiment is further provided with a drive IC function by the software of the control microcomputer 32, thereby further deleting the drive IC 33 shown in the first embodiment (see FIG. 5), The power supply voltage 9 for 20 was also abolished, and the power supply voltage for the vibrator 20 was made common and unified to 5V.

FIG. 25 is an explanatory diagram of the power supply unit 40 . The power supply unit block 40 includes two systems of an AC adapter (not shown), a DC jack 41 ^′ , a power supply voltage 5 V for the control microcomputer 32, and a power supply voltage 5 V for the vibrator 20.
Therefore, the power supply voltage of the power supply unit 40 can be unified to 5 V, and the size of the printed circuit board can be reduced by deleting the 3-terminal regulator 53 used in the first embodiment. To improve the operability of the second embodiment, a circuit input block diagram 500 , a control block diagram 30 0 , and an output block diagram 200 are the same as those in FIG.
The power supply block 40 is provided with a power switch SW52 and an AC adapter DC jack 41 so that it can be operated on the outer surface of the base 11 independently from the printed circuit board. A metal substrate 60 indicated by a dotted line as a base is disposed.

The operability of the economy class syndrome prevention device 1 is improved by using the metal substrate 61 indicated by the dotted line based on the metal on which the DC jack 41 'for the charger is mounted.
The metal substrates 60 and 61 are made of metal. In addition, as a countermeasure against EMI (Electro Magnetic Interference) and EMC (Electro Magnetic Compatibility), no electromagnetic noise is generated and electromagnetic noise enters. Even so, malfunctions and breakdowns are avoided.
The attachment positions of the metal substrates 60 and 61 are attached to the base 11 as shown in FIG. 29 described later.

FIG. 26 is an explanatory diagram showing a detection method of the vibration detection device by the eddy current displacement sensor 301. The vibration measuring device includes an eddy current displacement sensor 301, a displacement amount amplifier 302, an oscilloscope 303, and a personal computer 304.
From the relationship between the measured distance and the eddy current output voltage of the displacement sensor, and using the good linearity part of linearity, in the measurement, by measuring the output voltage V _p-p of the vertical axis, the distance of the horizontal axis (displacement Amount), that is, the amount of vibration displacement can be measured.
The horizontal axis represents the measurement distance (mm), and the vertical axis represents the output voltage (V).

The advantage of the eddy current sensor 301 is that by measuring the output voltage (V), the amount of displacement can be measured and the waveform shape of the vibration can be measured, so that the vibration characteristics can be analyzed.
However, there is a drawback that the linearity of the measurement changes depending on the material of the measurement surface, and this time the measurement surface is measured with an iron material made of SPCC steel.

FIG. 27 is a diagram of measurement results showing the relationship between the output voltage and the amount of vibration measured by the eddy current displacement sensor 301 in the iron lid 12 made of SPCC steel as the measurement surface.
The horizontal axis represents the measurement distance (mm), and the vertical axis represents the output voltage (V).
From this result, it can be confirmed that the range from 0.5 mm to 1.5 mm is linear.
As a measure of the measurement unit, it is 0.95 V / mm because of linearity. That is, the displacement amount mm can be measured from the value of the voltage V.

FIG. 28 is a graph showing a vibration waveform of the eddy current displacement sensor 301 when a square wave signal is input to the vibrator 20 to generate a pulse waveform. The horizontal axis represents time (ms), and the vertical axis represents output voltage (mV).
From the graph of FIG. 28, the input signal is a digital signal, but the output voltage is an analog waveform consisting of a sine wave, the amplitude (mm) can be measured from the output voltage V _p-p (V), and the frequency from the sweep time. Can be measured.
Here, DIV means one section of the scale and is expressed as 1 DIV = OOmV.
_VP-P indicates the voltage value of the peak peak and the peak valley.
Compared to the accelerometer vibrometer shown in FIG. 17, the displacement amount can be measured, the waveform shape of the vibration can be observed, and not only the vibration measurement result but also the vibration property of the measurement result can be analyzed.

  A third embodiment of the present invention will be described with reference to FIG.

FIG. 29 is a layout explanatory view showing Example 3 of the economy class syndrome prevention apparatus of the present invention.
In Example 3 of the economy class syndrome prevention apparatus of FIG. 29, the vibrator 20 is attached to the lid 12 of the L-shaped portion 12 ′ with a screw 13. The lid 12 is attached to the base 11 with a plurality of screws 13.
Further, a metal-based metal substrate 60 (see FIG. 25) on which the power switch 52 (see FIG. 25) and the AC adapter 41 (see FIG. 25) are mounted, and a jack for the charger 41 ′ (see FIG. 25). The metal bases 61 (see FIG. 25) each having a metal base are mounted on the base 11 respectively.

The lid 12 is an iron-based material made of SPCC steel so that it can be used in airplanes and medical institutions, and the end face is chamfered for safety, and is subjected to rust prevention treatment such as galvanization. .
In addition, as a countermeasure against EMI (electromagnetic interference) and EMC (electromagnetic compatibility), the metal surface is treated so as not to generate electromagnetic noise and to prevent malfunction or failure even when electromagnetic noise enters.

In the present invention, the base 11 is made of plastic, is reduced in weight, is subjected to primer coating treatment under the trade name (Super Excel Primer) manufactured by East Japan Paint, and is further metalized under the trade name (RS) manufactured by Roval. Paint treatment is applied.
As a countermeasure against EMI and EMC, the plastic base of the present invention is coated with metal so as not to generate electromagnetic noise and to prevent malfunction or failure even when electromagnetic noise enters.

FIG. 30 is a diagram illustrating a measured amount of the vertical vibration displacement amount (μm) in the vertical Z-axis direction in the economy class syndrome prevention device 1 by the eddy current displacement sensor 301 in the third embodiment.
An experiment was performed with the eddy current displacement sensor 301 attached to the lid 12 with vibration applied to the sole, and the frequency of the vibrator at the time of measurement was set to 200 Hz.
In order to amplify the vibration of the vibrator 20, a hole 70 is formed in the base 11, and four holes 70 are provided for heat dissipation of the vibrator 20, thereby reducing the weight of the base 11 and the amplitude. The purpose was to make the displacement uniform.

From this measurement result, the amplitude can be increased by 2 to 10 times and the amplitude in the Z-axis direction is 5.5 μm to 9.9 in a state where the vibrator 20 is installed on the lid 12 as compared with the first embodiment of FIG. It was 5 μm, and there was little variation, and it was possible to vibrate almost uniformly.
From this result, it was confirmed that the amplitude displacement was substantially uniformed by forming the hole 70 in the base 11 and dispersing the vibration application area and mass distribution of the lid 12.
The frequency applied to the vibrator 20 was 200 Hz, and the amount of vibration displacement in the Z-axis direction was measured.

FIG. 31 is a diagram illustrating the results of experiments conducted under the condition where the eddy current displacement sensor 301 is attached to the lid 12 and the vibration displacement (μm) in the horizontal Y-axis direction (μm) and the vertical Z-axis direction at each part of the base 11 is measured. FIG.
The frequency applied to the vibrator 20 was measured at 200 Hz.
In the vibration of this measurement result, the amplitude displacement amount in the Z-axis direction was 4.97 to 8.21 μm, and the amplitude displacement amount in the horizontal Y-axis direction was 4.21 to 6.15 μm.

From this result, the amplitude displacement in the Z-axis direction and the amplitude displacement in the horizontal Y-axis direction were 4.21 to 8.21 μm, and there was no significant difference.
Measurement in the horizontal Y-axis direction was performed by attaching an eddy current displacement sensor 301 to an L-shaped jig 305 as shown in FIG.
As shown in FIG. 31, the amplitude was measured alternately at two points ● and ■ on the outer peripheral portion of the vibrator at the central portion.
The frequency of vibration applied to the vibrator 20 was measured at 200 Hz.

FIG. 32 shows the results of an experiment with the eddy current displacement sensor 301 attached to the lid 12 and the measurement of the vibration displacement amount (μm) in the horizontal axis X direction (μm) and the vertical Z axis direction in each part of the base 11. It is explanatory drawing.
From this measurement result, the amplitude displacement in the horizontal X-axis direction was 1.26 μm, and the amplitude displacement in the vertical Z-axis direction was 3.87 to 5.89 μm.
From this result, the amplitude displacement of the horizontal X axis is smaller than the amplitude displacement of the vertical Z axis, and the amplitude displacement of the horizontal X axis is about ¼ that of the vertical Z axis.
Measurement in the horizontal X-axis direction was performed by attaching an eddy current displacement sensor 301 to an L-shaped jig 305 as shown in FIG.
As shown in the figure, the amplitude was measured alternately at two points of ● and ■ on the outer periphery of the vibrator at the center.

  From the results of Example 2, it can be seen that the amplitude displacement in the direction perpendicular to the sole is larger than the direction parallel to the sole, as shown in the measurement results of FIGS. 31 and 32. .

FIG. 33 is a diagram showing a plane figure obtained by combining two simple vibrations that vibrate in a direction perpendicular to each other, that is, a Lissajous figure.
This figure shows a Lissajous figure by a sine wave having the same amplitude and a phase difference of 45 ° at a frequency ratio of 1: 1 between the Z-axis input signal and the Y-axis input signal.
By knowing the Lissajous figure, it is possible to analyze the property of the mutual relationship between the horizontal amplitude displacement amount and the vertical amplitude displacement amount in the present invention.

FIG. 34 shows a Lissajous figure when the phase difference is changed by 0 °, 45 °, 90 °, and 135 ° at a frequency of 1: 1.
Note that the phase difference φ is the value of the intersection point B between the horizontal axis origin and the vertical axis of the elliptical Lissajous figure and the maximum value of the Lissajous figure from the horizontal axis origin in FIG. 34 at the same frequency. A value obtained from the value A based on the equation (11).

φ = sin ⁻¹ B / A (11)

At a frequency of 1: 1, when the phase difference is 0 degree, the vertical axis and the horizontal axis become a straight line inclined by 45 degrees as shown in FIG. 34, and when the vertical axis advances by 45 degrees, an ellipse inclined rightward is formed. When the vertical signal phase difference is advanced by 90 degrees, it becomes a circle.

When the phase difference of the vertical axis signal advances 135 degrees, an ellipse tilted to the left, and when the vertical axis signal advances 180 degrees, a straight line tilts 45 degrees to the left.

Thus, the phase state and vibration properties can be known from the phase difference.
However, all of the Lissajous figures of FIG. 34 are figures in which the input waveform is a sine wave and the amplitudes of the X axis and the Z axis are equal.

Since the vibrator 20 of the present invention is a single vibrator, the frequency and the amplitude are inevitably the same, and a special control method is not required.
From this Lissajous figure, the waveform of elliptical vibration can be analyzed, and by observing and evaluating the phase difference, an optimal vibration condition that promotes the flow of venous blood flow can be found.

With reference to FIG. 35, Example 4 of the economy class syndrome of this invention is demonstrated.
FIG. 35 is a plan view showing Example 4 of economy class syndrome of the present invention.
In the fourth embodiment, the vibrator 20 of the second embodiment is rotated by 90 ° and attached to the L-shaped fixture 201 with the screw 13 and fixed.

  When the vibrator according to the second embodiment is parallel to the sole, the amplitude displacement amount in the horizontal Y-axis direction is 4.21 to 6.15 μm from the result of FIG. 31, and the amplitude displacement amount in the horizontal X-axis direction. 32 is 1.26 μm from the result of FIG. 32, and the amount of amplitude is large. With reference to this result, an exciter is arranged in a direction perpendicular to the sole, and the amount of amplitude displacement in the horizontal Y-axis direction and the horizontal X The purpose is to reverse the axial amplitude displacement.

  In other words, the aim is to recirculate the blood flow of the plantar vein in the direction of the heart and to make the horizontal X-axis direction amplitude displacement amount larger than the horizontal Y-axis direction amplitude displacement amount.

FIG. 36 is a diagram illustrating measurement results of the vertical vibration displacement amount (μm) in the vertical Z-axis direction according to the third embodiment. The frequency at the time of measurement was set to 200 Hz.
The horizontal axis represents time (ms), and the vertical axis represents output voltage (V).
From this measurement result, the vertical vibration displacement amount in the vertical Z-axis direction is 7.4 to 55.2 μm by rotating the attachment of the vibrator 20 by 90 °, and the amplitude displacement amount in the Z direction of the second embodiment. Is several times to several tens of times larger than 5.5 to 9.5 μm.
In this figure, when the vibration waveform of the eddy current sensor 301 is observed, the vibration amount of the portion indicated by the arrow display portion is the largest.
The horizontal axis represents time (ms), and the vertical axis represents amplitude displacement (μm) converted from voltage.
The Z-axis vibration was a sinusoidal vibration waveform.

FIG. 37 shows the results of measuring the vibration displacement amount (μm) in the horizontal Y-axis direction and the vibration displacement amount (μm) in the vertical Z-axis direction at each part of the base 11 using the eddy current displacement sensor 301 of Example 3. It is explanatory drawing shown.
From this measurement result, the vibration displacement amount in the horizontal Y-axis direction was 6.9 to 9.3 μm and the vibration displacement amount in the Z-axis direction was 11.6 to 33.3 μm. The vibration displacement amount is smaller than the vibration displacement amount in the Z-axis direction.
The measurement in the horizontal Y-axis direction was performed with the L-shaped jig 305 attached.
As shown in the figure, the measurement points were alternately performed at two points of ● and ■ on the outer peripheral portion.

FIG. 38 shows the measured amount of vertical vibration amount (μm) in the vertical Z-axis direction of Example 3 on the Y-axis plane, and the position of the exciter is moved to the 10 mm unit at the center portion and the middle portion of the heel portion. It is a figure which shows the result observed in the state.
From this result, the amount of displacement in the vertical Z-axis direction of the center portion of the vibrator changes linearly from 12.6 to 38.7 μm, that is, the amplitude gradually decreases from the end face of the lid 12. There was found.
Further, the amount of displacement in the vertical Z-axis direction between the central portion and the heel portion varies linearly from 22.3 to 50.9 μm, that is, the amplitude gradually decreases from the end face of the lid 12. There was found.

From the above results, it was found that the vibration displacement amount in the Z direction can be increased by installing the vibrator 20 in the present invention at a position that does not interfere with the base 11 around the outer periphery.
If this result is applied, if possible, the two exciters 20 are not shown, but if two of them are arranged facing each other, a synergistic effect is expected, and it has been found that the amount of vibration displacement can be applied on average.

As the present invention, the position of the vibrator 20 is set at a position in the center portion so as to be biased to a position where it does not interfere with the base 11 by the L-shaped jig 201 (see FIG. 35), It has been found that it is preferable to arrange two vibrators 20.
The horizontal axis in FIG. 38 represents the horizontal position, and the vertical axis represents the displacement. The frequency at the time of measurement was set to 200 Hz.

FIG. 39 shows vibration in a state where the vibrator 20 is attached with the vibrator 20 of the second embodiment being rotated 90 degrees by the L-shaped fixture 201 (see FIG. 35). It is a measurement result of displacement.
It is explanatory drawing which shows the result of having measured the horizontal X-axis direction vibration displacement amount (micrometer) and the vertical Z-axis direction vibration displacement amount (micrometer) in each part of the base 11 using the eddy current type displacement sensor 301 of Example 3. FIG. .
From this measurement result, it was found that the vibration displacement amount in the Z-axis direction is 32.6 to 10.5 μm from the end face of the lid 12, and the amplitude displacement amount is gradually reduced.
The amount of vibration displacement in the X-axis direction is 10.9 to 18.7 μm from the end face of the lid 12, and it has been found that the amount of amplitude displacement increases stepwise.
Further, it has been found that the amplitude of the vibration displacement amount in the Z-axis direction gradually decreases from the end face of the lid 12 to 32.6 to 10.5 μm.
In other words, the vibration displacement amount in the Z-axis direction and the vibration displacement amount in the X-axis direction are in a relationship in which the inclinations are opposite to each other.

From this result, it is found that the vibration displacement amount in the X-axis direction is 10.9 to 18.7 μm, which is larger than the vibration displacement amount in the horizontal Y-axis direction shown in FIG. 37 6.9 to 9.3 μm. did.
Therefore, from this result, as the present invention, the horizontal X-axis direction amplitude displacement amount can be made larger than the horizontal Y-axis direction amplitude displacement amount with the aim of returning the plantar vein blood flow to the heart direction.
Note that the measurement in the horizontal X-axis direction was performed with the L-shaped jig 305 attached.
As shown in the figure, the measurement points were obtained by alternately changing the outer peripheral position of the end surface of the lid 12 at two points, ● and ■.

As shown in FIG. 38, the position of the vibrator 20 is set at a position in the center portion so that it is biased to a position where it does not interfere with the base 11 by the L-shaped jig 201, and thereby the vibration displacement in the X direction is reduced. It is expected that the vibration displacement amount in the Z direction can be averagely applied by arranging two vibrators 20 so as to be larger than the vibration displacement amount in the Y direction.

    FIG. 40 is a Lissajous figure in the X-axis direction and the Z-axis direction when the rotation direction of the vibrator according to the third embodiment is changed.

The horizontal axis represents the X-direction vibration displacement amount, and the vertical axis represents the Z-direction vibration displacement amount.
From this result, the phase difference on the end face position (●) side of the lid 12 is about 135 °, and the X-direction vibration displacement is 18.7 μm, which is larger than the Z-axis vibration displacement of 10.5 μm. There was found.

  It was found that the end face position (■) side of the lid 12 had a phase difference of about 119 °, the X-direction vibration displacement amount was 11.2 μm, and was smaller than the Z-axis vibration displacement amount of 31.6 μm. It was found that the Lissajous figure did not change even if the rotation direction (clockwise or counterclockwise) of the vibrator was changed. Therefore, it has been found that the clockwise direction of the vibrator or the rotational direction such as the counterclockwise direction need not be considered. Here, there is no frequency change between the X-axis direction amplitude and the Z-axis direction amplitude.

DESCRIPTION OF SYMBOLS 1 Economy class syndrome prevention apparatus 10 Excitation apparatus arrangement means 11 Base 12 Lid 20 Exciter 31 Drive transistor array 32 Control microcomputer 41 AC adapter 45 Battery 51 Volume 52 Power switch 100 Accelerometer probe 110 Accelerometer type vibration Total 201 L-shaped fixture 301 Eddy current displacement sensor

Claims (6)

An excitation source capable of generating elliptical vibrations having horizontal and vertical vibration components;
Control means for controlling horizontal and vertical vibrations of the excitation source according to a predetermined vibration frequency;
A power supply unit for the excitation source;
Means for transmitting the vibration of the excitation source to the sole or lower limb of the user,
The excitation source has a vibrator composed of a rotor and a stator opposed to the rotor, and the vibrator vibrates in resonance according to the vibration frequency,
The resonance vibration is generated in a radial (radial) direction due to the eccentricity of the inner diameter of the stator and the outer diameter of the rotor so that the centers of the rotor and the stator do not coincide with each other. seen including a vibration, thrust (axial) direction vibrations generated due to the central position of the rotation axis direction are offset in the rotor and the stator,
The vibrator is pulse-driven by four-phase / one-phase excitation,
The frequency of pulse drive of the vibrator is 50 to 300 Hz,
The control means changes the ratio of the time of output 1 to the time of output 0, and sets the reciprocal of the cycle in the pulse repetition cycle of output 1 and output 0 at this time. By doing so, the economy class syndrome prevention apparatus characterized by controlling the frequency of the pulse drive of the said vibrator .   The economy class syndrome prevention apparatus according to claim 1, wherein the vibration exciter is attached to a base part or a lid part of the economy class syndrome prevention apparatus. The economy class syndrome prevention device according to claim 1 or 2 , wherein the vibrator is attached to a base portion or a lid portion of the economy class syndrome prevention device via an attachment. The economy according to any one of claims 1 to 3 , wherein the control means controls the vibrator with power saving by controlling a duty ratio between an H level and an L level without changing a frequency. Class syndrome prevention device. The economy class syndrome prevention device according to any one of claims 1 to 4 , further comprising a base portion or a lid portion on which an electromagnetic shield subjected to metal coating or metal plating is applied. Economy class syndrome prevention device according to any one of claims 1 to 5, characterized by comprising means for adjusting the vibration frequency of the vibrator.

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