Wave generator and electrostimulator

Abstract

To provide a wave generator capable of ameliorating fatigue sufficiently.SOLUTION: A wave generator 10 includes a wave generation part 30. The wave generation part 30 generates a first wave 71, a second wave 72, and a third wave 73. The frequency of the first wave 71 is 1 KHz or more and 20 KHz or less, and the frequency of the second wave 72 and the frequency of the third wave 73 are 100 Hz or more and 500 Hz or less. An ON period 101 of the second wave 72 and an ON period 103 of the third wave 73 are composed by the first wave 71 being repeated a plurality of times. The frequency of the second wave 72 is different from the frequency of the third wave 73. The wave generation part 30 generates the second wave 72 and the third wave 73 alternately and repetitively.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to an electrical wave generator in an EMS (Electrical Muscle Stimulation) device or the like, and an electrical stimulation device including a wave generator. [Background technology]

[0002] There are devices that apply mechanical vibration and electrical stimulation to the head in order to alleviate eye strain. Patent Document 1 discloses that mechanical vibration with a frequency of alpha waves, between 7 Hz and 13 Hz, is applied to the head. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-190637 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional wave generating devices have a problem in that they are unable to sufficiently alleviate the fatigue that is the target of improvement. An example of the fatigue that is the target of improvement is eye strain.

[0005] An object of the present invention is to provide a wave generating device that can sufficiently reduce fatigue. [Means for solving the problem]

[0006] The wave generating device of the present invention includes a wave generating unit that generates a first wave, a second wave, and a third wave, the frequency of the first wave being equal to or greater than 1 KHz and equal to or less than 20 KHz, the frequency of the second wave and the frequency of the third wave being equal to or greater than 100 Hz and equal to or less than 500 Hz, the on period of the second wave and the on period of the third wave being constituted by the first wave being repeated multiple times, the frequency of the second wave being different from the frequency of the third wave, and the wave generating unit repeatedly generates the second wave and the third wave alternately. Effect of the Invention

[0007] According to the present invention, a wave generating device capable of sufficiently reducing fatigue can be provided. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a diagram showing the front of the wave generating device of the present embodiment. [Diagram 2] FIG. 2 is a diagram showing a side view of the wave generating device of the present embodiment. [Diagram 3] FIG. 2 is a diagram showing the bottom surface of the wave generating device of the present embodiment. [Figure 4] 2A and 2B are diagrams illustrating electrode pads according to the present embodiment. [Diagram 5] FIG. 2 is a diagram showing the electrode pad of the present embodiment placed near the outer corner of the eye. [Figure 6] FIG. 2 is a diagram showing a first composite burst wave of the present embodiment. [Figure 7] FIG. 11 is a diagram showing a second composite burst wave of the present embodiment. [Figure 8] FIG. 11 is a diagram showing a third composite burst wave of the present embodiment. [Figure 9] FIG. 11 is a diagram showing a fourth composite burst wave of the present embodiment. [Figure 10] FIG. 2 is a diagram showing a first single burst wave of the present embodiment. [Figure 11] FIG. 11 is a diagram showing a second single burst wave of the present embodiment. [Figure 12]10 is a diagram showing a fifth wave of the present embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (Electrical Stimulation Device) DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. Figures 1, 2 and 3 are diagrams showing a wave generating device 10 according to the present embodiment. Figure 4 is a diagram showing an electrode pad 50 according to the present embodiment.

[0010] The electrical stimulation device 1 of this embodiment is a device that generates electrical waves and transmits the generated waves to the human body as electrical stimulation. The electrical stimulation device 1 includes a wave generating device 10 and an electrode pad 50.

[0011] The wave generating device 10 is a device that generates desired waves, which will be explained later.

[0012] The electrode pad 50 is a component that transmits to the human body the waves generated by the wave generating device 10. The waves transmitted from the electrode pad 50 to the human body become electrical stimulation.

[0013] In the electrical stimulation device 1, waves generated by a wave generating device 10 are transmitted to the human body via electrode pads 50 as electrical stimulation.

[0014] (Wave generator) FIG. 1 shows a front surface 12 of the wave generating device 10. FIG. 2 shows a side surface 13 of the wave generating device 10. FIG. 3 shows a bottom surface 14 of the wave generating device 10. The shape of the wave generating device 10 is approximately a rectangular parallelepiped. X-direction, Y-direction and Z-direction are shown in FIG. 1, FIG. 2 and FIG. 3. The X-direction, Y-direction and Z-direction are mutually perpendicular. The X-direction, Y-direction and Z-direction show the same direction in FIG. 1, FIG. 2 and FIG. 3.

[0015] 1, the wave generating device 10 includes a wave generating section 30 and a wave output section 32. The wave generating section 30 and the wave output section 32 are not shown in FIGS.

[0016] The wave generating section 30 is a section that generates a desired wave. The wave output section 32 is a section that outputs the wave generated by the wave generating section 30 to the electrode pad 50.

[0017] (Operation section on the surface) A description will now be given of the operation units and the like provided on the wave generator 10. As shown in Fig. 1, the wave generator 10 has a level display unit 16, a level up button 18, a level down button 19, a start and charge lamp 21, and a start and stop button 20 on the front surface 12.

[0018] The level display unit 16 is a section that displays the strength of the waves generated by the wave generation unit 30. The level up button 18 is a button for increasing the strength of the waves generated by the wave generation unit 30. The level down button 19 is a button for decreasing the strength of the waves generated by the wave generation unit 30. The start and charge lamp 21 is a lamp that indicates whether or not electrical stimulation by the electrical stimulation device 1 has started, and the charging status of the wave generation device 10. The start and stop button 20 is a button for starting electrical stimulation by the electrical stimulation device 1, and for ending electrical stimulation by the electrical stimulation device 1.

[0019] (Bottom socket) As shown in FIG. 3, the wave generating device 10 has a pad cord insertion port 23 and a charging cord insertion port 24 on the bottom surface 14.

[0020] The pad cord socket 23 is a socket for inserting the pad cord 60. The pad cord 60 is a cord that connects the wave generating device 10 and the electrode pad 50. The pad cord 60 is not shown in Fig. 3. The pad cord 60 is shown in Fig. 5. The pad cord 60 will be described later with reference to Fig. 5.

[0021] The charging cord receptacle 24 is a receptacle for plugging in a cord for charging the wave generating device 10. The charging cord receptacle 24 can be, for example, a USB C connector.

[0022] Length D1 in FIG. 1 is the length of the wave generating device 10 in the Y direction. Length D2 in FIG. 1 is the length of the wave generating device 10 in the X direction. Length D3 in FIG. 1 is the length of the wave generating device 10 in the Z direction. Lengths D1, D2, and D3 are not particularly limited. An example of length D1 is 127 mm. An example of length D2 is 62 mm. An example of length D3 is 21.5 mm.

[0023] (Electrode pad) Electrode pad 50 will be described with reference to Figures 4 and 5. Figure 5 is a diagram showing a state in which electrode pad 50 is placed near the corner of the eye of a user of electrical stimulation device 1. Hereinafter, the user of electrical stimulation device 1 will be simply referred to as the "user."

[0024] 4 and 5, the shape of the electrode pad 50 is substantially circular. One surface of the electrode pad 50 is provided with an adhesive. The electrode pad 50 is adhered to the vicinity of the corner of the eye of a user of the electrical stimulation device 1 via the adhesive. The shape of the electrode pad 50 is not limited to a circular shape.

[0025] The electrode pads 50 are preferably attached near the corners of both eyes of the user. The electrical stimulation device 1 preferably includes two or more electrode pads 50.

[0026] The electrode pad 50 is electrically connected to the wave generation device 10 via a pad cord 60. More specifically, a connection wire 52 is connected to the electrode pad 50. One end of the pad cord 60 is connected to the connection wire 52. One end of the pad cord 60 is connected to the pad cord socket 23. This electrically connects the electrode pad 50 to the wave generation device 10. When multiple electrode pads 50 are connected to the wave generation device 10, the multiple wires from the electrode pads 50 may be combined into one wire in the pad cord 60.

[0027] (wave) The waves generated by the wave generating unit 30 will be described with reference to Fig. 6 to Fig. 12. Fig. 6 to Fig. 12 are diagrams showing the waves generated by the wave generating unit 30.

[0028] The wave generating section 30 of this embodiment generates a first wave 71, a second wave 72, and a third wave 73. The first wave 71, the second wave 72, and the third wave 73 will be outlined below, as well as the relationship between them, with reference to Fig. 6 .

[0029] The frequency of the first wave 71 is equal to or higher than 1 KHz and equal to or lower than 20 KHz. The first wave 71 is a medium frequency wave. A wave having a frequency of equal to or higher than 1 KHz and lower than 20 KHz is called a medium frequency wave.

[0030] The frequency of the second wave 72 and the frequency of the third wave 73 are 100 Hz or more and 500 Hz or less. The second wave 72 and the third wave 73 are low frequency waves. Waves with a frequency of less than 1 KHz are called low frequency waves.

[0031] The wave of this embodiment has the following characteristics. The second wave 72 and the third wave 73 are composed of the first wave 71. The frequency of the second wave 72 is different from the frequency of the third wave 73. The second wave 72 and the third wave 73 are burst waves. Here, a wave that includes a predetermined period of time during one cycle in which there is no potential fluctuation is called a burst wave.

[0032] As described above, in the wave of this embodiment, a low-frequency burst wave is formed by a medium-frequency wave. Also, the second wave 72 and the third wave 73, which have different frequencies, are generated alternately and continuously. The following will explain each in order.

[0033] (2nd and 3rd waves) A specific waveform will be described based on the second wave 72 and the third wave 73 shown in Fig. 6. The second wave 72 and the third wave 73 are burst waves as described above. The second wave 72 and the third wave 73 include an on period and an off period within one cycle.

[0034] (on and off periods) The on-periods of the second wave 72 are indicated by on-periods 101. The off-periods of the second wave 72 are indicated by off-periods 102. The on-periods of the third wave 73 are indicated by on-periods 103. The off-periods of the third wave 73 are indicated by off-periods 104.

[0035] The on-period 101 of the second wave 72 and the on-period 103 of the third wave 73 are configured by repeating the first wave 71 multiple times. The frequency of the first wave 71 shown in Fig. 6 is 6 KHz. In the on-period 101 and the on-period 103, the first wave 71 of 6 KHz is repeated.

[0036] The off period 102 of the second wave 72 and the off period 104 of the third wave 73 are periods of no potential.

[0037] There is not just one type of frequency of the first wave 71. The first wave 71 having other frequencies will be described later.

[0038] The second wave 72 and the third wave 73 have different frequencies. In the wave shown in Fig. 6, the frequency of the second wave 72 is 300Hz. The frequency of the third wave 73 is 318Hz. One period of the second wave 72 is 3333.3μS. One period of the third wave 73 is 3144.7μS.

[0039] The length of the on period 101 of the second wave 72 is 765 μS. The length of the off period 102 of the second wave 72 is 2568 μS.

[0040] The length of the on period 103 of the third wave 73 is 765 μS. The length of the off period 104 of the third wave 73 is 2379 μS.

[0041] (Length of ON period) The length of the on period 101, the length of the off period 102, the length of the on period 103, and the length of the off period 104 can be changed as appropriate.

[0042] Alternatively, the length of the on-period 101 can be 10% to 90% of the wavelength of the second wave 72. Similarly, the length of the on-period 103 can be 10% to 90% of the wavelength of the third wave 73.

[0043] (Length of off period) The length of the OFF period 102 is 3333.3 μS minus the length of the ON period 101. The length of the OFF period 104 is 3144.7 μS minus the length of the ON period 103.

[0044] (Second Wave Frequency and Third Wave Frequency) It is possible to appropriately change the frequency of the second wave 72 and the frequency of the third wave 73. The frequency of the second wave 72 and the frequency of the third wave 73 are preferably 100 Hz or more and 500 Hz or less.

[0045] Changing the frequency of the second wave 72 changes the period of the second wave 72. In accordance with the change in the period of the second wave 72, the length of the ON period 101 or the length of the OFF period 102 is changed appropriately.

[0046] Similarly, changing the frequency of the third wave 73 changes the period of the third wave 73. In accordance with the change in the period of the third wave 73, the length of the on period 103 or the length of the off period 104 is changed appropriately.

[0047] (The difference in frequency between the second and third waves) In the example shown in Fig. 6, the difference between the frequency of the second wave 72 and the frequency of the third wave is 18 Hz. The difference between the frequency of the second wave 72 and the frequency of the third wave is not limited to 18 Hz. The difference between the frequency of the second wave 72 and the frequency of the third wave is preferably 3 Hz or more and 30 Hz or less.

[0048] (First complex burst wave) The second wave 72 and the third wave 73 are repeated one cycle at a time. A wave formed by repeating the second wave 72 and the third wave 73 is called a first composite burst wave 204.

[0049] The first composite burst wave 204 shown in FIG. 6 is composed of a second wave 72, which is a burst wave with a frequency of 300 Hz, and a third wave 73, which is a burst wave with a frequency of 318 Hz, repeated every other period.

[0050] (First wave) The first wave 71 will be described. As described above, the first wave 71 constitutes the on-period 101 of the second wave 72 and the on-period 103 of the third wave 73. The frequency of the first wave 71 shown in FIG. 6 is 6 KHz. During the on-period 101 and the on-period 103, the first wave 71 continues to be generated.

[0051] The frequency of the first wave is not limited to 6KHz. The frequency of the first wave can be changed in various ways. Examples of changing the frequency of the first wave will be described later. The preferred frequency of the first wave is 1KHz or more and 20KHz or less.

[0052] (Modification of composite burst wave) The composite burst wave has been described by taking the first composite burst wave 204 shown in FIG. 6 as an example. The composite burst wave is not limited to the first composite burst wave 204. This embodiment includes other composite burst waves. Each of them will be described in order below.

[0053] Another composite burst wave is a composite burst wave in which the frequency of the first wave 71 constituting the on-period 101 of the second wave 72 and the on-period 102 of the third wave 73 is changed. Another composite burst wave is a composite burst wave in which the frequency of the second wave 72 and the frequency of the third wave 73 constituting the composite burst wave are changed.

[0054] (Second complex burst wave) The second composite burst wave 208 will be described with reference to FIG. 7. The second composite burst wave 208 and the first composite burst wave 204 differ in the frequency of the first wave constituting the on period 101 and the on period 103. The on period 101 and the on period 103 of the first composite burst wave 204 are composed of a first wave having a frequency of 6 KHz. In contrast, the on period 101 and the on period 103 of the second composite burst wave 208 are composed of a first wave having a frequency of 12 KHz. By changing the frequency of the first wave 71, a different composite burst wave can be obtained.

[0055] In the second composite burst wave 208, the frequency of the first wave 71 used is different from that of the first composite burst wave 204, so that the lengths of the on periods 105, 107 and the off periods 106, 108 can be different from those of the first composite burst wave 204. Alternatively, the lengths of the on periods 105, 107 and the off periods 106, 108 may be the same as those of the first composite burst wave 204.

[0056] In the second composite burst wave 208, similarly to the first composite burst wave 204, the length of each period can be changed as appropriate.

[0057] (Third complex burst wave) The third composite burst wave 205 will be described with reference to FIG. 8. In the third composite burst wave 205, the frequencies of the second wave 72 and the third wave 73 constituting the composite burst wave are different from those of the first composite burst wave 204. In the first composite burst wave 204, the frequency of the second wave 72 is 300 Hz, and the frequency of the third wave 73 is 318 Hz. In contrast, in the third composite burst wave 205, the frequency of the second wave 72 is 150 Hz, and the frequency of the third wave 73 is 155 Hz.

[0058] In the third composite burst wave 205, the frequency of the second wave 72 and the frequency of the third wave 73 are different from those in the first composite burst wave 204, and therefore the lengths of the on periods and off periods can be different from those in the first composite burst wave 204. The lengths of the on periods 111, 113 and the off periods 112, 114 may be determined in the same manner as in the first composite burst wave 204.

[0059] In the third composite burst wave 205, similarly to the first composite burst wave 204, the length of each period can be changed as appropriate.

[0060] (4th complex burst wave) The fourth composite burst wave 209 will be described with reference to Fig. 9. The fourth composite burst wave 209 and the third composite burst wave 205 have different frequencies of the first waves constituting the on-period 115 and the on-period 117. The on-period 111 and the on-period 113 of the third composite burst wave 205 are composed of the first waves having a frequency of 6KHz. In contrast, the on-period 115 and the on-period 117 of the fourth composite burst wave 209 are composed of the first waves having a frequency of 12KHz.

[0061] In the fourth composite burst wave 209, the frequency of the first wave 71 used is different from that of the third composite burst wave 205, so that the lengths of the on periods 115, 117 and the off periods 116, 118 can be different from those of the third composite burst wave 205. Alternatively, the lengths of the on periods 115, 117 and the off periods 116, 118 can be the same as those of the third composite burst wave 205.

[0062] In the fourth composite burst wave 209, similarly to the first composite burst wave 204, the length of each period can be changed as appropriate.

[0063] The wave generating device 10 of this embodiment repeatedly generates multiple types of waves and composite burst waves in a fixed order. The waves generated by the wave generating device 10 are not limited to composite burst waves. The wave generating device 10 generates a single-frequency burst wave and a fifth wave. Unlike composite burst waves, a single-frequency burst wave is a burst wave composed of waves of one type of frequency. A single-frequency burst wave is called a single-burst wave. Each will be explained in order below.

[0064] (First single burst wave) The first single burst wave 202 will be described with reference to FIG. 10. The first single burst wave 202 changes its amplitude periodically. The first single burst wave 202 includes a gradually increasing period 121, a stationary period 122, and a pause period 123. The gradually increasing period 121 is a period in which the amplitude of the wave gradually increases. The stationary period 122 is a period in which the amplitude of the wave is constant. The pause period 123 is a period in which no wave is generated. The gradually increasing period 121, the stationary period 122, and the pause period 123 are repeated multiple times in this order.

[0065] 10, the length of the gradual increase period 121 is 2.5S. The length of the steady period 122 is 4.5S. The length of the pause period 123 is 2S. The length of each period is an example. The length of each period can be changed as appropriate.

[0066] (Regular period) 10 is an enlarged view of a part of the stationary period 122 of the first single burst wave 202. In the burst wave 203, the second wave 72 is a continuous wave.

[0067] (Ramp-up and off-peak periods) In the gradual increase period 121, the amplitude of the burst wave 203 gradually increases. In the pause period 123, the amplitude of the burst wave 203 becomes zero.

[0068] In this way, the first single burst wave 202 is composed of the burst wave 203 of a single frequency. Note that Fig. 10 illustrates an example in which the frequency of the burst wave 203 is 300 Hz. The frequency of the burst wave 203 constituting the first single burst wave 202 can be changed as appropriate.

[0069] (Second single burst wave) The second single burst wave 206 will be described with reference to Fig. 11. The second single burst wave 206 is different from the first single burst wave 202 in the frequency of the first wave 71 constituting the on-period 105 of the burst wave 207 constituting the second single burst wave 206. In the first single burst wave 202, the first wave 71 of 6 KHz constitutes the second wave 72. In contrast, in the second single burst wave 206, the first wave 71 of 12 KHz constitutes the second wave 72.

[0070] In the second single burst wave 206, similarly to the first single burst wave 202, the frequency of the first wave 71 constituting the on period 105 of the burst wave 207 constituting the second single burst wave 206 is different from that of the first single burst wave 202.

[0071] The frequency of the first wave 71 used in the first single burst wave 202 is 6 KHz, whereas the frequency of the first wave 71 used in the second single burst wave 206 is 12 KHz.

[0072] The second single burst wave 206, like the first single burst wave 202, includes a ramp-up period 124, a steady-state period 125, and a rest period 126. The lengths of these periods are the same as those of the first single burst wave 202.

[0073] (5th wave) The fifth wave 201 will be described with reference to Fig. 12. Fig. 12 is a diagram showing the fifth wave 201. As shown in Fig. 12, the fifth wave 201 is a wave with a frequency of 3 KHz. One period of the fifth wave 201 is 3333.3 µS.

[0074] It is possible to set an appropriate length of the ON period 131 of the fifth wave 201. It is possible to set an appropriate length of the OFF period 132 of the fifth wave 201. It is possible to change the lengths of these periods as appropriate.

[0075] The on-period 131 of the fifth wave 201 is formed by a plurality of repetitions of the fourth wave 74. The frequency of the fourth wave 74 shown in FIG.

[0076] (Wave generation order) The wave generating section 30 of the wave generating device 10 generates the above-mentioned waves in a predetermined repetitive order. An example of the repetitive order will be described.

[0077] An example of a repetition order is the repetition of (1) to (8) below. (1) 5th Wave 201 (frequency: 3KHz) (2) First single burst wave 202 (frequency: 300 Hz) (6KHz burst wave) (3) First composite burst wave 204 (frequency: 300Hz and 318KHz) (6KHz burst wave) (4) The third composite burst wave 205 (frequency: 150Hz and 155KHz) (6KHz burst wave) (5) Second single burst wave 206 (frequency: 300 Hz) (12KHz burst wave) (6) Second composite burst wave 208 (frequency: 300Hz and 318KHz) (12KHz burst wave) (7) 4th complex burst wave 209 (frequency: 150Hz and 155KHz) (12KHz burst wave) (8) 5th Wave 201 (Frequency: 3KHz)

[0078] The above (1) to (8) include two types of burst configurations of 6KHz and 12KHz, as well as alternating output transmissions of 300Hz and 318Hz, and 150Hz and 155KHz.

[0079] The above-mentioned (1) to (8) are repeated for a total of 10 minutes as one cycle, for example, (1) for 1 minute, (2) for 2 minutes, (3) for 1 minute, (4) for 1 minute, (5) for 2 minutes, (6) for 1 minute, (7) for 1 minute, and (8) for 1 minute.

[0080] (Wave arrangement order) By arranging each wave in one cycle in the above order, the eye muscles can be acted on more effectively. Specifically, first, the 6KHz burst wave stretches and relaxes the eye muscles. Then, the 12KHz burst wave, which reaches deeper than the 6KHz burst wave, can stimulate the eye muscles more effectively. Each wave will be explained in order.

[0081] (Composite Burst Wave) The above cycle includes the complex burst waves of (3), (4), (6), and (7). The complex burst waves include low-frequency waves of different frequencies. Also, different frequencies are repeated in the complex burst waves. In the complex burst waves of (3) and (6), a 300 Hz wave and a 318 KHz wave are repeated. In the complex burst waves of (4) and (7), a 150 Hz wave and a 155 KHz wave are repeated.

[0082] By repeating waves of different frequencies, it is possible to stimulate muscles at desired positions under the skin. When electrode pad 50 is placed on the skin, the position that the waves reach under the skin varies depending on the frequency. Waves with lower frequencies reach deeper positions under the skin than waves with higher frequencies.

[0083] In the composite burst waves of (3) and (6), the 300 Hz wave and the 318 KHz wave reach different positions near the subcutaneous tissue, while in the composite burst waves of (4) and (7), the 150 Hz wave and the 155 KHz wave reach different positions near the subcutaneous tissue.

[0084] By alternately delivering stimulation to different subcutaneous locations in the vicinity, stimulation can be applied to muscles or the like in the vicinity of the delivery location.

[0085] (Multiple types of composite burst waves) The above cycle also includes (3) and (4) composite burst waves of 300 Hz and 318 Hz repeated, and (6) and (7) composite burst waves of 150 Hz and 155 Hz repeated. As mentioned above, the location where the wave reaches subcutaneously changes depending on the frequency. Therefore, the waves (3) and (4) and the waves (6) and (7) reach different locations subcutaneously. The waves (3) and (4) reach a deeper location subcutaneously than the waves (6) and (7).

[0086] In this embodiment, by including waves (3) and (4) and waves (6) and (7), it is possible to stimulate different subcutaneous sites, thereby stimulating the eye muscles in a multifaceted manner.

[0087] As described above, in this embodiment, by including a composite burst wave, it is possible to stimulate a muscle at a desired position, such as 20 mm below the skin, which corresponds to the inner muscle of the eye muscle.

[0088] In addition, in this embodiment, by including composite burst waves in different frequency ranges, that is, a composite burst wave in the vicinity of 300 Hz and a composite burst wave in the vicinity of 150 Hz, it is possible to provide stimulation to different subcutaneous positions.

[0089] (Composition of low frequencies by mid frequencies) In waves (2) to (7), the mid-frequency waves of 6KHz and 12KHz are combined to produce low-frequency waves of 150Hz, 158Hz, 300Hz, and 318Hz. This allows humans to sense the mid-frequency waves as a stimulus.

[0090] Mid-frequency waves can be perceived by humans as heat. Mid-frequency waves are difficult for humans to perceive as stimuli. By using mid-frequency waves to create low-frequency waves, it is possible to artificially make humans perceive the mid-frequency waves as stimuli.

[0091] (Burst wave frequency) The cycle described above contains waves composed of two different burst waves of medium frequency, (2) to (4) and (5) to (7). The frequency of the burst waves that compose waves (2) to (4) is 6KHz. The frequency of the burst waves that compose waves (5) to (7) is 12KHz.

[0092] The cycle composed of the above waves (1) to (8) is an example. The types of waves included in one cycle and the generation time of each wave can be changed as appropriate. For example, the generation time of the composite burst wave of (3), (4), (6) and (7) is not limited to 1 minute. The generation time of the composite burst wave can be, for example, 30 seconds or more.

[0093] (How to use the electrical stimulation device) A method of using the electrical stimulation device 1 will be described with reference to Fig. 5. Note that the wave generating device 10 of the electrical stimulation device 1 is not shown in Fig. 5. The wave generating device 10 is shown in Fig. 1 and the like.

[0094] As shown in Fig. 5, the electrical stimulation device 1 is used by placing the electrode pad 50 on the area to which electrical stimulation is desired. When electrical stimulation is desired to be applied to the eye muscles, the electrode pad 50 is placed near the outer corner of the eye. When electrical stimulation is desired to be applied to the eye muscles, it is preferable to place the electrode pad 50 on the outer corner of each eye. Note that the placement of the electrode pad 50 in Fig. 5 and described above is an example. The electrode pad 50 can be placed appropriately on the area to which electrical stimulation is desired.

[0095] The waves generated by the wave generating unit 30 are transmitted to the user via the wave output unit 32, the pad cord 60, the connection wiring 52, and the electrode pad 50. The user can adjust the level of electrical stimulation, etc., via the various operating units shown in FIG.

[0096] (efficacy) The electrical stimulation device 1 can improve, for example, eye fatigue. Eye fatigue refers to the stiffening of the eye muscles due to their contraction. The eye muscles refer to the muscles around the eyes. Examples of eye muscles are the extraocular muscles and the orbicularis oculi muscles. The extraocular muscles include the medial rectus muscle, the external canal muscle, the superior rectus muscle, the inferior rectus muscle, the superior oblique muscle, and the inferior oblique muscle. The electrical stimulation device 1 particularly stimulates the above-mentioned extraocular muscles, stretching the extraocular muscles and relaxing the extraocular muscles.

[0097] As described above, the electrical stimulation device 1 of the present embodiment stimulates the eye muscles with a composite burst wave, making it possible to stimulate desired eye muscles that were difficult to stimulate with conventional techniques that use low-frequency waves.

[0098] Furthermore, the electrical stimulation device 1 of the present embodiment stimulates the eye muscles with multiple types of composite burst waves, so that multiple types of eye muscles can be stimulated accurately.

[0099] <1> A wave generating unit is provided, the wave generating unit generates a first wave, a second wave, and a third wave; The frequency of the first wave is 1 KHz or more and 20 KHz or less, The frequency of the second wave and the frequency of the third wave are 100 Hz or more and 500 Hz or less, The on-period of the second wave and the on-period of the third wave are configured by repeating the first wave multiple times; the frequency of the second wave is different from the frequency of the third wave; The wave generating unit alternately and repeatedly generates the second wave and the third wave. Wave generator.

[0100] <2> The difference between the frequency of the second wave and the frequency of the third wave is 3 Hz or more and 30 Hz or less. <1> The wave generating device according to claim 1.

[0101] <3> The wave generating unit alternately and repeatedly generates the second wave and the third wave, and generates the second wave and the third wave together for 30 seconds or more. <1> or <2> The wave generating device according to claim 1.

[0102] <4> The length of the on-period of the second wave is 10% or more and 90% or less of the period of the second wave, The length of the on-period of the third wave is 10% or more and 90% or less of the period of the third wave. <1> from <3> 13. A wave generating device according to any one of claims 1 to 12.

[0103] <5> <1> from <4> A wave generating device according to any one of the above items, An electrical stimulation device comprising: The wave generating device includes a wave output unit, The electrode pad is also electrically connected to the wave output unit, The wave output unit outputs the wave generated by the wave generating unit to the electrode pad. Electrical stimulation device.

[0104] <6> The electrode pad is disposed near the outer corner of the eye, Electrical stimulation is transmitted from the electrode pad to the extraocular muscle. <5> The electrical stimulation device described in

[0105] Although the embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment, and various modifications and variations are possible. For example, the wave generating device and the electrical stimulation device can be used to improve physical fatigue other than eye fatigue. [Explanation of symbols]

[0106] 1 Electrical Stimulation Device 10 Wave Generator 30 Wave Generator 32 Wave Output Section 50 Electrode Pads 52 Connection wiring 60 Pad Code 71 First Wave 72 Second Wave 73 The Third Wave 101 On Period 103 On Period

Claims

1. A wave generating unit is provided, the wave generating unit generates a first wave, a second wave, and a third wave; The frequency of the first wave is 1 KHz or more and 20 KHz or less, The frequency of the second wave and the frequency of the third wave are 100 Hz or more and 500 Hz or less, The on-period of the second wave and the on-period of the third wave are configured by repeating the first wave multiple times; the frequency of the second wave is different from the frequency of the third wave; The wave generating unit alternately and repeatedly generates the second wave and the third wave. Wave generator.

2. The difference between the frequency of the second wave and the frequency of the third wave is 3 Hz or more and 30 Hz or less.

2. A wave generating device according to claim 1.

3. The wave generating unit alternately and repeatedly generates the second wave and the third wave, and generates the second wave and the third wave in total for 30 seconds or more.

3. A wave generating device according to claim 1 or 2.

4. The length of the on-period of the second wave is 10% or more and 90% or less of the period of the second wave, The length of the on-period of the third wave is 10% or more and 90% or less of the period of the third wave.

3. A wave generating device according to claim 1 or 2.

5. A wave generating device according to claim 1 or 2; An electrical stimulation device comprising: The wave generating device includes a wave output unit, The electrode pad is also electrically connected to the wave output unit, The wave output unit outputs the wave generated by the wave generating unit to the electrode pad. Electrical stimulation device.

6. The electrode pad is disposed near the outer corner of the eye, Electrical stimulation is transmitted from the electrode pad to the extraocular muscle.

6. The electrical stimulation device according to claim 5.

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