Electrical stimulation device

Abstract

This electrical stimulation device is provided with: a holding part (104) which can be worn on the head and which is bent in the longitudinal direction; and two electrical stimulation parts (102) which are held by the holding part (104) on both end sides in the longitudinal direction of the holding part (104), and which are capable of applying electrical stimulation by being in contact with both cheeks so as to sandwich the face when the holding part (104) is worn on the head. When the holding part (104) is worn on the head, the two electrical stimulation parts (102) are located at positions closer to the front side in the front-rear direction of the head than the extension line of the central side part when viewed in the left-right direction of the head.

Description

Technical Field

[0001] The present invention relates to electrical stimulation devices. Background Art

[0002] Patent document 1 discloses an electrical stimulation device in the shape of a simulated headphone worn on the head. In the electrical stimulation device, by adjusting the length of the slider band, the position of the pad (i.e., the electrical stimulation portion) relative to the headband can be adjusted, thereby enabling the electrical stimulation portion to contact the user's face. The electrical stimulation portion can provide electrical stimulation to the facial muscles. As a result, fatigue recovery effects and slimming effects are provided to the user's face, and the device can be used for beauty treatment.

[0003] Patent Document 1: International Publication No. 2020 / 012754

[0004] (1) In the electrical stimulation device of Patent Document 1, in order to make the electrical stimulation part contact the face, the headband has to be worn in a manner tilted toward the back of the head. If the head is shaken or walking, the electrical stimulation device is likely to shift and fall off. Summary of the invention

[0005] The present invention was completed under such circumstances, and one of the exemplary purposes of a certain form thereof is to provide an electrical stimulation device that can be worn on the head, and in which the electrical stimulation portion can contact the cheek and provide electrical stimulation to the cheek, and the electrical stimulation portion is not easily displaced from the contact position.

[0006] (2) The present invention was completed under such circumstances, and one of the exemplary purposes of a certain form thereof is to provide an electrical stimulation device that can train muscles safely and efficiently.

[0007] (1) An electrical stimulation device according to a certain aspect of the present invention comprises: a holding portion that can be worn on the head and is bent in the longitudinal direction; and two electrical stimulation portions that are held on the holding portion at both ends of the longitudinal direction of the holding portion, respectively, and when the holding portion is worn on the head, can contact the cheeks in a manner of clamping the face and impart electrical stimulation. When the holding portion is worn on the head, the two electrical stimulation portions are located at a position closer to the front side of the head in the front-back direction than the extension line of the central side portion when viewed in the left-right direction of the head.

[0008] (2) An electrical stimulation device according to one aspect of the present invention comprises: electrodes capable of imparting electrical stimulation to a body; and a control unit that repeatedly applies a pulse group to the electrodes. The control unit changes the width of the pulse group according to the frequency of applying the pulse group.

[0009] Furthermore, any combination of the above-described constituent elements, and any form of expression in which constituent elements of the present invention are mutually replaced between methods, apparatuses, systems, and the like may also be practiced as additional forms of the present invention.

[0010] (1) According to the present invention, there can be provided an electrical stimulation device that can be worn on the head, can make the electrical stimulation part contact the cheek and provide electrical stimulation to the cheek, and the electrical stimulation part is not easy to deviate from the contact position and fall off. In addition, (2) According to the present invention, there can be provided an electrical stimulation device that can safely and efficiently train muscles. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] [ Figure 1 ] is a three-dimensional diagram of the electrical stimulation device involved in an embodiment.

[0012] [ Figure 2 ] means to Figure 1 A three-dimensional diagram of the electrical stimulation device being worn on the head.

[0013] [ Figure 3 ] is viewed from the front side in the front-to-back direction Figure 1 Front view of the electrical stimulation device.

[0014] [ Figure 4 ] is viewed from the rear side in the front-to-back direction Figure 1 Rear view of the electrical stimulation device.

[0015] [ Figure 5 ] is viewed from the left side in the left-right direction Figure 1 Side view of the electrical stimulation device.

[0016] [ Figure 6 ] is to indicate Figure 1 An exploded stereoscopic view of the periphery of the electrical stimulation part on the right side.

[0017] [ Figure 7 ] is to indicate Figure 1 Block diagram of the functional structure of the electrical stimulation unit.

[0018] [ Figure 8 ] is to indicate Figure 1 A flow chart of an example of the operation of an electrical muscle stimulation device.

[0019] [ Fig. 9 ] is a diagram showing a method for generating electrical stimulation of different frequencies in an EMS program.

[0020] [ Fig.10 ] is a diagram showing a structural example of an EMS program.

[0021] [ Fig.11 ] Fig.10 (a) and (b) represent Figure 1 Figure 1 is a diagram of a first example of electrodes of an electrical stimulation unit.

[0022] [ Fig.12 ]yes Fig.10Expanded view of the conductive fabric of the electrode.

[0023] [ Fig.13 ] is to indicate Figure 1 Figure 2 is a diagram of a second example of electrodes of an electrical stimulation unit.

[0024] [ Fig.14 ] is correct Fig.12 A diagram illustrating the steps of producing an electrode according to a second example.

[0025] [ Fig.15 ] is a front view of the electrical stimulation device involved in the modified example observed from the front side in the front-to-back direction.

[0026] [ Fig.16 ] is a three-dimensional diagram of an electrical stimulation device according to another variation.

[0027] [ Fig.17 ] Fig.16 (a) and (b) are stereoscopic views of an electrical stimulation device according to another variation. DETAILED DESCRIPTION

[0028] The present invention is described below with reference to the accompanying drawings based on preferred embodiments. The embodiments are illustrative and do not limit the invention. All features and combinations of features described in the embodiments are not necessarily the essence of the invention. In the embodiments and modified examples, the same or equivalent components and parts are marked with the same reference numerals, and repeated descriptions are appropriately omitted.

[0029] Reference Figures 1 to 6 . The electrical stimulation device 100 is an EMS (Electrical Muscle Stimulation) device that provides electrical stimulation to the muscles of the user. The electrical stimulation device 100 is configured to be wearable on the head of the user, and can provide electrical stimulation to the facial muscles while being worn on the head. That is, the electrical stimulation device 100 is configured to be basically used on the face. In addition, the electrical stimulation device 100 can also be used in areas other than the face, such as the neck, arms, or legs, as long as the area can be clamped and used by the two electrical stimulation parts 102L and 102R described later.

[0030] In this specification, for the convenience of explanation, the front-to-back direction, left-to-right direction, and up-down direction are defined based on the orientation of the head of the user wearing the electrical stimulation device 100. In addition, the description of the above directions does not limit the posture of using the electrical stimulation device 100, and the electrical stimulation device 100 can be used in any posture.

[0031] The electrical stimulation device 100 has a shape simulating a headphone. The electrical stimulation device 100 includes a holding portion 104 and two electrical stimulation portions 102L and 102R (hereinafter, referred to as "electrical stimulation portion 102" when not specifically distinguished or collectively referred to). The holding portion 104 can be worn on the head and has a shape that is curved in the long side direction. The two electrical stimulation portions 102L and 102R are respectively held on the holding portion 104 at both end sides in the long side direction of the holding portion 104. When the holding portion 104 is worn on the head, the two electrical stimulation portions 102L and 102R can respectively contact the cheeks in a manner of clamping the face and impart electrical stimulation to the muscles of the cheeks.

[0032] The holding portion 104 includes a headband portion 110, two arms 112L and 112R (hereinafter, referred to as "arms 112" when not specifically distinguished), and a support belt 114 (see Figures 1-2 ,exist Figures 3 to 6 The headband 110 and the arm 112 are not particularly limited, but can be formed of a raw material that is not easily broken and has resistance to chemical substances (such as hairdressing agents), such as PP (polypropylene). In addition, the headband 110 and the arm 112 can also be formed of a flexible raw material such as POM (polyacetal).

[0033] The headband 110 is bilaterally symmetrical. In addition, as long as the effect of the present invention is achieved, the headband 110 may not be bilaterally symmetrical. The headband 110 has a shape that is bent in a manner that follows the outer shape of the user's head. When observed from the front (i.e., when observed from the front in the front-to-back direction), the headband 110 can be roughly inverted U-shaped, or can be roughly C-shaped rotated 90 degrees to the right. The headband 110 supports the entire electrical stimulation device 100 by being worn on the user's head, for example, on the upper side of the ear. The headband 110 is preferably worn on the head in a manner that is placed on the top of the user's head. The "top of the head" here includes the approximately highest point of the head in addition to the highest point of the head. The "approximately highest point" of the head refers to, for example, a range of 5 cm in diameter from the highest point of the head when looking down at the head. The following is an example of a case where the headband 110 is worn on the head in a manner that is placed on the top of the user's head.

[0034] The headband 110 is made of resin, metal, etc. The headband 110 is configured to be elastically deformable in such a way that the distance between the two ends changes. The distance between the two ends of the headband 110 changes when the electrical stimulation device 100 is worn on the user's head and when the headband 110 is worn on the user's head. Figures 1 to 6In this way, the distance between the electrical stimulation device 100 when it is not worn on the user's head (i.e., in a natural state) is different. Specifically, the distance when worn is longer than the distance when not worn. Moreover, the two electrical stimulation parts 102L and 102R when worn are forced toward each other (i.e., in a manner of clamping the face) by the restoring force of the headband part 110 accompanied by elastic deformation.

[0035] The headband portion 110 includes a central portion 116 and two extension portions 118L and 118R extending from the central portion 116 (hereinafter, referred to as "extension portion 118" when not specifically distinguished). When the electrical stimulation device 100 is worn, the right end of the central portion 116 is located near the right ear, the left end is located near the left ear, and the center is placed on the top of the head. When viewed from the side, the central portion 116 extends straightly in the up and down direction (see FIG. Figure 5 ).

[0036] The extension portion 118L extends from the left end portion of the central portion 116. The extension portion 118R extends from the right end portion of the central portion 116. When viewed from the side, the extension portion 118 extends in a direction intersecting the extension direction of the central portion 116 so as to be located downward as it approaches the front side (see FIG. Figure 5 ).

[0037] The arm 112 is an elongated plate-shaped member configured to be elastically deformable. The arms 112L and 112R are connected to the extension portions 118L and 118R of the headband 110 at one end and connected to the electrical stimulation units 102L and 102R at the other end. That is, the headband 110 holds the electrical stimulation unit 102 via the arm 112.

[0038] The arm 112 extends forward, downward, and inward (in other words, the center side in the left-right direction, in other words, the side close to the other arm 112) from the connection portion with the extension portion 118. The arm 112 is bent and twisted in the center portion in the long side direction, and the main surface 112a that is generally facing inward on the extension portion 118 side is generally facing upward on the electrical stimulation portion 102 side.

[0039] When the electrical stimulation device 100 is worn, the electrical stimulation parts 102L and 102R are respectively stretched outward to the left and right sides, and the arm 112 is elastically deformed in a manner that the bending and twisting are alleviated. The electrical stimulation part 102 is urged toward the cheek of the user, that is, toward the inside and the back, by the restoring force of the elastically deformed arm.

[0040] Preferably, the headband portion 110 and the two arms 112L, 112R are configured such that, regardless of whether the user's face is large or small, when the electrical stimulation device 100 is worn, the force with which each of the two electrical stimulation portions 102L, 102R presses the cheek clamped between the two electrical stimulation portions 102L, 102R is greater than 2N. In this case, a high degree of close contact between the electrodes of the two electrical stimulation portions 102L, 102R and the cheeks can be achieved. In addition, the electrical stimulation device 100 is kept from deflecting by the force of the two electrical stimulation portions 102L, 102R clamping the face. This is conducive to suppressing the deflection of the electrical stimulation device 100 when the electrodes of the two electrical stimulation portions 102L, 102R are electrodes that do not require gel pads, that is, when there is no adhesion between the two electrical stimulation portions 102L, 102R and the cheeks. In addition, when the electrical stimulation device 100 is used on a part other than the face (such as the neck, arms or legs), the part is clamped by the two electrical stimulation parts 102L and 102R, and the electrical stimulation device 100 is maintained at the part without shifting.

[0041] The first and second band-side engaging portions 120a and 120b are formed on the extension portion 118. The arm-side engaging portion 122 is formed on the arm 112. The arm 112 and thus the electrical stimulation portion 102 are mounted on the headband portion 110 by engaging the arm-side engaging portion 122 with any one of the first and second band-side engaging portions 120a and 120b.

[0042] The positions of the two electrical stimulation parts 102 relative to the headband part 110 can be adjusted to a first position where the arm side engaging part 122 engages with the first band side engaging part 120a, and a second position where the arm side engaging part 122 engages with the second band side engaging part 120b. The second band side engaging part 120b is arranged in a position that is forward, downward, or forward and downward of the first band side engaging part 120a. Therefore, the second position is a position that is forward, downward, or forward and downward of the first position. In addition, Figures 1 to 5 , the two electrical stimulation parts 102 are in the first position.

[0043] In the example shown in the figure, the first and second belt side engaging portions 120a and 120b are formed to be arranged in the extending direction of the extending portion 118 (see Figure 6). That is, the second band-side snap-in portion 120b is formed at a position forward and downward than the first band-side snap-in portion 120a. In this case, the second position of the electrical stimulation portion 102 is a position forward and downward (i.e., close to the neck) than the first position. Therefore, the first position is a position suitable for users with smaller heads, and the second position is a position suitable for users with larger heads. That is, the position of the electrical stimulation portion 102 relative to the headband portion 110 can be adjusted to the first position, and the second position, which is a position forward and downward than the first position, so that both users with smaller heads and users with larger heads can use the electrical stimulation device 100.

[0044] In addition, as a modified example, three or more belt side engaging parts may be formed on the extension part 118. In this case, the three or more belt side engaging parts may be formed to be arranged in the extension direction of the extension part 118. That is, the belt side engaging parts located in the front may be located at the lower side.

[0045] As described above, the extension portion 118 extends forward from the central portion 116, and the arm 112 extends forward from the central portion 116. Therefore, the electrical stimulation portion 102 connected to the arm 112 is located at a position closer to the front side than the central portion 116. Specifically, when viewed from the side, no matter where the electrical stimulation portion 102 is located, the central portion O of the electrical stimulation portion 102 is located at a position closer to the front side than the extension line E of the central portion 116 (see FIG. 1 ). Figure 5 ). In the example shown in the figure, no matter where the electrical stimulation unit 102 is located, the entire electrical stimulation unit 102 (i.e., the entirety of each of the pair of electrodes 126) is located in front of the extension line E of the central portion 116. The extension line E is an extension of the central line passing through the front and rear center of the central portion 116 when viewed from the side. The electrical stimulation unit 102 is located in front of the extension line E of the central portion 116, so that even if the central portion 116 is placed on the top of the head in a manner extending up and down, the cheeks can be clamped by the electrical stimulation unit 102. That is, it is possible to realize an electrical stimulation device 100 that is not easily deviated.

[0046] In this example, the belt-side engaging portion 120 is a recessed portion formed on the inner side of the extending portion 118, and the arm-side engaging portion 122 is a convex portion provided on the outer side of the arm 112 (see Figure 6 The arm 112 is attached to the extension portion 118 by means of the screw 150 in a state where the convex portion of the arm-side engaging portion 122 is engaged (fitted) with the concave portion of the belt-side engaging portion 120 .

[0047] The mounting angle of the arm 112 relative to the extension portion 118, more specifically, the mounting angle around the rotation axis substantially parallel to the left-right direction can be adjusted. The belt-side engaging portion 120 and the arm-side engaging portion 122 can be configured so that the mounting angle can be adjusted in multiple stages or steplessly.

[0048] Support belt 114 (refer to Figures 1-2 ) is a flexible and elongated band. The two ends of the support band 114 are separated from each other in the long side direction of the headband part 110 and are installed on the headband part 110. The support band 114 is worn on the back of the head when the electrical stimulation device 100 is worn. The support band 114 is preferably fixed to the headband part 110 near just above the ear. The fixing position of the support band 114 can also be adjusted in the long side direction of the headband part 110. The support band 114 can also be removable. In this case, whether to install the support band 114 is optional.

[0049] When wearing the electrical stimulation device 100, for example, when the head is tilted forward, or when the top of the head is tilted together with the body movement, the electrical stimulation device 100 is in danger of shifting and falling off due to its weight. By wearing the support belt 114 at the back of the head, the shifting and falling off can be prevented.

[0050] In addition, in order to suppress the electrical stimulation device 100 from shifting and falling off, it is possible to enhance the restoring force of the headband 110 and clamp the head more strongly. However, in this case, the face is clamped more strongly by the electrical stimulation part 102 and the face collapses, and the appearance when wearing the electrical stimulation device 100 deteriorates. In this way, for example, when using it while looking in the mirror, the user will not be very interested. In addition, for example, when the user wants to upload the usage status to SNS, the user will hesitate because of the appearance. In addition, it will be uncomfortable if the face is clamped more strongly. In contrast, by using the support belt 114, there is no need to clamp the head more strongly to suppress the shifting and falling off.

[0051] The length of the support belt 114 can also be adjusted by also having fasteners such as buckles and Velcro (not shown). And the support belt 114 can also be elastic in the length direction. In the above case, the support belt 114 can be firmly worn on the back of the head, and the displacement and falling off of the electrical stimulation device 100 can be further suppressed. In addition, if the support belt 114 is firmly worn on the back of the head, the headband part 110 and even the electrical stimulation part 102 are pulled toward the back of the head, thereby, the skin of the face is pulled toward the back of the head. That is, EMS training can be performed while the skin of the face is pulled. In addition, the electrical stimulation part 102 can be pressed strongly against the cheek, and the body sensation when the electrical stimulation is given becomes better.

[0052] The two electrical stimulation parts 102L and 102R are constructed similarly to each other except that they are symmetrical. In addition, as long as the effect of the present invention is achieved, the two electrical stimulation parts 102L and 102R may not be symmetrical. The electrical stimulation part 102 includes a pair of electrodes 126 fixed to the outer surface of the inner side (user side) of the shell 124 constituting the outer shell of the electrical stimulation part 102. The shell 124 can be formed of various resin materials. In order to impart electrical stimulation to the muscles, a voltage is applied to the pair of electrodes 126. The pair of electrodes 126 are electrodes that do not require a gel pad that is a necessary consumable in the existing electrical stimulation device, specifically, a cloth electrode. The cloth electrode is used after being moistened with water. The cloth electrode has a long life, that is, it can be used many times before the life is reached. In addition, the cloth electrode can be washed. In addition, the pair of electrodes 126 may also be electrodes other than cloth electrodes, such as metal electrodes. In addition, the pair of electrodes 126 may also be electrodes that require a gel pad.

[0053] Reference Figure 7 . Figure 7 The modules shown can be implemented in hardware by components and mechanical devices represented by a computer CPU (Central Processing Unit), and in software by computer programs, etc., but the functional modules implemented by their cooperation are described here. Therefore, those skilled in the art who have access to this specification understand that the above-mentioned functional modules can be implemented in various forms by a combination of hardware and software.

[0054] The electrical stimulation unit 102 further includes an operation unit 128 , a contact detection unit 130 , a communication unit 132 , a control unit 134 , a charging terminal 136 , and a battery 138 .

[0055] The operation unit 128 is operated by the user. When the user operates the operation unit 128, an operation signal corresponding to the operation is generated, and the control unit 134 performs control based on the operation signal. The operation unit 128 may also include a button for turning the power on / off, or a button for increasing or decreasing the level of electrical stimulation.

[0056] When the pair of electrodes 126 are in contact with the skin, the contact detection unit 130 detects this. In the present embodiment, the contact detection unit 130 is configured as a current detection unit that detects the current flowing between the pair of electrodes 126. That is, when the pair of electrodes 126 are in proper contact with the skin, the current flows between the pair of electrodes 126 via the skin, so the contact of the skin can be detected by detecting the current. In addition, the contact detection unit 130 is not limited to this, and may also be a detection unit using other detection methods. For example, the contact detection unit 130 may also include a pressure sensor that detects the contact of the skin based on the measured pressure. For another example, the contact detection unit 130 may also include an optical sensor that detects the contact of the skin based on changes in the measured amount of light, etc.

[0057] In this example, the communication unit 132 is configured as a wireless communication unit. In addition, the communication unit 132 may also be configured as a wired communication unit. The communication unit 132 communicates with the communication unit 132 of the other electrical stimulation unit 102. Thus, the two electrical stimulation units 102 can provide electrical stimulation in a linked manner. For example, the two electrical stimulation units 102 can provide electrical stimulation substantially simultaneously, or the two electrical stimulation units 102 can provide electrical stimulation alternately. In addition, the communication unit 132 may also communicate with a communication device other than the electrical stimulation device 100.

[0058] The battery 138 is electrically connected to the control unit 134 and supplies power to the control unit 134. The battery 138 is preferably a secondary battery such as a lithium-ion battery, but may also be a primary battery. The charging terminal 136 receives power for charging the battery 138 and outputs it to the control unit 134. Various connectors can be used for the charging terminal 136. The battery 138 is charged by the power received by the charging terminal 136. The battery 138 may also be configured to be charged by a non-contact charging system such as wireless charging.

[0059] If the control unit 134 detects that the pair of electrodes 126 are in contact with the skin through the contact detection unit 130, the control unit 134 applies voltage to the pair of electrodes 126 according to the EMS program. That is, electrical stimulation is given to the muscles of the user. The control unit 134 can also provide electrical stimulation in conjunction with the other electrical stimulation unit 102.

[0060] Furthermore, the control unit 134 controls the charging power received at the charging terminal 136 and supplies the power to the battery 138 .

[0061] The operation of the electrical stimulation device 100 configured as above will be described. Figure 8 . Figure 8 The process S100 is shown in which the user turns on the power supply while wearing the electrical stimulation device 100 on the head and starts and ends electrical stimulation of the face.

[0062] The power of the electrical stimulation device 100 is turned on (S102).

[0063] The control unit 134 determines whether the electrode 126 is in contact with the skin based on the detection result of the contact detection unit 130 (S104). When the electrode 126 is not in contact with the skin (No in S104), it is determined whether a prescribed skin contact waiting time (e.g., 120 seconds) has passed (S106). When the prescribed skin contact waiting time has not passed (No in S106), the control unit 134 waits for the prescribed waiting time and returns the process to S104. When the prescribed skin contact waiting time has passed without detecting contact with the skin (Yes in S106), the process is terminated. At this time, the power supply of the electrical stimulation device 100 may also be disconnected.

[0064] When the electrode 126 is in contact with the skin (Yes in S104), the control unit 134 starts applying electrical stimulation to the user's face according to the EMS program (S108). By applying electrical stimulation, blood flow to the face can be promoted, and improvement of skin moisture and skin elasticity can be expected.

[0065] The control unit 134 determines whether the end condition is met (S110). The end condition may be, for example, the end of the EMS program, or, for example, the pair of electrodes 126 are no longer in contact with the skin, or, for example, an end instruction is received from the outside (such as the user). If the end condition is not met (No in S110), the control unit 134 returns the process to the front end of S108 after waiting for a specified standby time. If the end condition is met (Yes in S110), the process ends. At this time, the power supply of the electrical stimulation device 100 may also be disconnected.

[0066] Reference Fig. 9 . Fig. 9 1 shows the waveform of the AC voltage applied between the pair of electrodes 126 by the control unit 134. This waveform is composed of a combination of positive and negative basic pulses of time width t1. The positive basic pulse causes a current to flow in the positive direction from one of the pair of electrodes 126 toward the other, and the negative basic pulse causes a current to flow in the negative direction from the other toward the one. In addition, in this figure, the height of the basic pulse is constant, but it can be adjusted by the user operating the operation unit 128.

[0067] A stop period of time width t2 is provided between positive and negative basic pulses. The applied voltage during this stop period is 0. In this waveform, a basic pulse group of time width t3 (=5×t1+5×t2) including 5 basic pulses and 5 stop periods is formed. Moreover, this basic pulse group is coordinated with the stop period of time width t4 provided later to form a basic waveform of period (time width) t5 (=t3+t4).

[0068] In the above-described waveform configuration method, the control unit 134 can generate electrical stimulation of a desired frequency by appropriately changing the period t5 of the basic waveform.

[0069] Here, in the conventional electrical stimulation device, electrical stimulation of a desired frequency is generated by appropriately changing only the time width t4 of the rest period in the cycle t5 (= t3 + t4).

[0070] In contrast, in the present embodiment, not only the time width t4 during the stop period but also the time width t3 of the basic pulse group is appropriately changed to produce electrical stimulation of a desired frequency. That is, the time width t3 of the basic pulse group is changed according to the desired frequency. In this case, although the frequency is increased, for example, the frequency is increased to 20Hz, which can continuously and efficiently perform training, the time width t3 of the basic pulse group is shortened, so that the maximum current can be relatively low. That is, a safer electrical stimulation device can be provided as an electrical stimulation device that can be used for sensitive parts from the neck upwards. In addition, on the contrary, although the maximum current is suppressed to a lower level, the frequency can be increased to a relatively high frequency, for example, 20Hz. Therefore, the training time can be relatively short. That is, efficient training can be performed in a shorter time.

[0071] Preferably, the control unit 134 shortens the time width t3 of the basic pulse group, etc., so that (1) the current flowing between the pair of electrodes 126 through the human body, (2) the voltage applied to the pair of electrodes, and (3) the time of applying electrical stimulation do not exceed the limit values ​​that should be observed to ensure safety, and electrical stimulation of the desired frequency is generated.

[0072] The time widths t1 to t5 for generating electrical stimulation of each frequency may also be as shown in Table 1.

[0073] [Table 1]

[0074] EMS frequency (Hz) t1(μs) t2(μs) t3(ms) t4(ms) t5(ms) 2 100 100 1 499 500 4 100 100 1 249 250 6 100 100 1 166 167 7 100 100 1 124 125 10 100 100 1 99 100 20 50 50 0.5 49.5 5 40 25 25 0.25 24.75 25

[0075] Reference Fig.10 .exist Fig.10 In the example of the EMS program of , the program time (ie, the time of providing electrical stimulation) is 10 minutes, which is divided into 4 stages. The length of each stage can be set appropriately, for example, as follows.

[0076] PH1: about 25 seconds

[0077] Dancing stage PH2: about 30 seconds

[0078] Training phase PH3: about 515 seconds

[0079] Cool-down phase PH4: about 30 seconds

[0080] The tapping stage PH1 is the initial stage of the EMS program, and is a stage for reproducing the tapping in beauty treatment using a low frequency of less than 10 Hz. In the tapping stage PH1, the frequency of the electrical stimulation is gradually increased. In this example, it is gradually increased in the order of 4 Hz, 6 Hz, 8 Hz, and 10 Hz. In the tapping stage PH1, although not particularly limited, electrical stimulation may be applied to the two electrical stimulation units 102 substantially simultaneously.

[0081] The dancing stage PH2 is a stage in which the facial muscles are moved in coordination with the music. In this stage, the two electrical stimulation units 102 provide electrical stimulation in accordance with the music, or the frequency of the electrical stimulation is changed in accordance with the music. For example, in 2H z 、4H z , 10H z 、20H z In the dance phase PH2, the two electrical stimulation units 102 are substantially simultaneously applied with electrical stimulation, or the two electrical stimulation units 102 are applied with electrical stimulation alternately (for example, the electrical stimulation is applied alternately with a gap of several seconds). In addition, the two electrical stimulation units 102 may also apply electrical stimulation according to a timing automatically determined based on the music information.

[0082] The training phase PH3 is the main phase for facial muscle training. In this phase, electrical stimulation of a frequency suitable for promoting incomplete tetanic contraction is applied to the muscles. In this example, electrical stimulation of 20 Hz is applied to enable continuous and efficient training. In the training phase PH3, electrical stimulation is applied to the two electrical stimulation parts 102 substantially simultaneously, or the two electrical stimulation parts 102 are applied alternately.

[0083] The end exercise stage PH4 is the stage of ending exercise after training, and the frequency and level of electrical stimulation (i.e., the voltage applied to a pair of electrodes 126) are gradually reduced. In this example, the frequency is gradually reduced in the order of 10 Hz, 8 Hz, 4 Hz, and 2 Hz, and the end exercise stage PH4 and even a series of programs are ended. In the end exercise stage PH4, although not particularly limited, electrical stimulation can also be given to the two electrical stimulation units 102 substantially at the same time.

[0084] Next, the electrode 126 as a fabric electrode will be described.

[0085] (First example of electrode)

[0086] Reference Fig.11 (a) and (b) illustrate a first example of the electrode 126. Fig.11 (a) shows the side in contact with the skin, Fig.11 (b) shows the side opposite to the housing 124.

[0087] The electrode 126 includes: a conductive cloth 140 sewn into a bag shape, a cushioning material (elastic component) 142 accommodated therein, and a pair of mounting components 144 fixed to the conductive cloth 140. The conductive cloth 140 is in a shape with both ends of one long side cut off so that the electrode 126 does not protrude when the electrode 126 is mounted on the housing 124 of the electrical stimulation unit 102.

[0088] The conductive cloth 140 is, for example, a fabric woven from conductive fibers, which are formed by attaching and impregnating conductive polymers such as PEDOT-pTS (poly(3,4-ethylenedioxythiophene)-p-toluenesulfonic acid) and PEDOT-PSS (poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid) to fibers such as silk or synthetic fibers such as nylon. The conductive cloth 140 does not use metal in its raw materials, and accordingly has high washing durability. In particular, when using conductive fibers attached to or containing metals such as silver, there is a risk of reduced conductivity due to oxidation and corrosion, and metal allergies due to the user's physique, but the conductive cloth 140 does not have the above concerns. In addition, when using conductive fibers attached to metals, there is a risk of reduced conductivity due to peeling caused by friction, but the conductive cloth 140 does not have this concern. By forming electrodes with the conductive cloth 140, it is possible to conduct electricity between the electrodes without sticking a gel pad as with the electrodes of existing electromyography stimulation devices.

[0089] If the conductive cloth 140 is not wet, there is a risk of applying electrical stimulation locally to the skin, so it is preferable to wet the conductive cloth 140 with a sprayer or the like so that it slightly retains moisture. Thus, even in a state where there is no sweating, the current conduction state between the pair of electrodes 126 can be stabilized. In any case, the conductive cloth 140 is used in a state wetted with a conductive liquid such as sprayed water or sweat.

[0090] The cushioning material 142 is, for example, sponge, and forms the convex shape of the entire shape of the electrode 126. In addition, by accommodating the cushioning material 142 in the conductive cloth 140, the adhesion between the conductive cloth 140, namely, the electrode 126, and the skin can be improved.

[0091] The buffer material 142 may also have hydrophobicity. When the conductive cloth 140 is wetted, if the amount of water exceeds the amount that the conductive cloth 140 can hold, water will enter the buffer material 142 side. In the case where the buffer material 142 is not hydrophobic, the water that has entered the buffer material 142 side is retained in the buffer material 142 and does not penetrate into the conductive cloth 140. In contrast, in the case where the buffer material 142 is hydrophobic, the water that has entered the buffer material 142 side actively penetrates into the conductive cloth 140. Thus, the conductive cloth 140 can be kept wet.

[0092] The pair of mounting members 144 are detachably mounted on a pair of mounted members 146 (see Figure 6 ). Thus, the electrode 126 is mounted on the housing 124. Alternatively, one of the mounting component 144 and the mounted component 146 may be a male snap and the other may be a female snap. The power from the battery 138 is supplied to the conductive fabric 140 via the mounted component 146 of the housing 124 and the mounting component 144 of the electrode 126.

[0093] Reference Fig.11 (a), (b) and Fig.12 , the steps of manufacturing the electrode 126 of the first example are described.

[0094] (1) The conductive cloth 140 is cut into a predetermined shape.

[0095] (2) The welding cloth 148 is attached to the conductive cloth 140 .

[0096] (3) The mounting member 144 is fixed to the portion of the conductive cloth 140 on the side corresponding to the housing 124 by, for example, riveting.

[0097] (4) The conductive fabric 140 is folded along the folding line L, and the short side 140a thereof is sewn with a sewing machine.

[0098] (5) Turn the conductive fabric 140 over from the unsewn long side 140b side.

[0099] (6) The cushioning material 142 is placed into the bag-shaped conductive cloth 140 from the unsewn long side.

[0100] (7) The long side 140b of the conductive fabric 140 is sewn using a sewing machine.

[0101] According to this step, since the short side 140a is sewn without inserting the cushioning material 142, sewing is easier than sewing with inserting the cushioning material 142, and the manufacturing cost can be reduced.

[0102] (Second example)

[0103] Reference Fig.13 A second example of the electrode 126 will be described. The description will focus on the differences from the first example. In the second example, both ends of the bag-shaped conductive cloth 140 in the longitudinal direction are folded. The attachment member 144 is fixed to the folded portion of the conductive cloth 140 .

[0104] Reference Fig.13 and Fig.14 , the steps of manufacturing the electrode 126 of the second example are described.

[0105] (1) The conductive cloth 140 is cut into a predetermined shape.

[0106] (2) A welding cloth (not shown) is attached to the conductive cloth 140 .

[0107] (3) Fold the conductive fabric 140 in half and sandwich the cushioning material 142 in between (see Fig.14 (a)).

[0108] (4) Use a sewing machine to sew both ends of the conductive fabric 140 in the long direction, that is, the short side 140a side ( Fig.14 (b)).

[0109] (5) The mounting members 144 are fixed to both ends of the conductive fabric 140 in the longitudinal direction by, for example, riveting. Fig.14 (b)).

[0110] (6) The long side 140b of the conductive fabric 140 is sewn using a sewing machine.

[0111] (7) Both ends of the conductive cloth 140 in the longitudinal direction are folded toward the side that does not block the mounting member 144 .

[0112] (7) At least one of the three sides of the folded portion is sewn so that the two ends of the conductive fabric 140 in the longitudinal direction are kept folded. Fig.14 In (e), at least one side of the dotted line portion is sewn on both sides in the long side direction.

[0113] According to this step, the cushioning material 142 can be easily inserted by clamping the cushioning material 142 before sewing. In addition, when the short side 140a side is sewn in step (4), the short side 140a side is relatively far away from the cushioning material 142, so the short side 140a side can be sewn without the cushioning material 142 becoming an obstacle.

[0114] The present invention has been described above based on the embodiments. Those skilled in the art will appreciate that the embodiments are illustrative, and that the combination of the above-mentioned components and processing steps may have various variations, and such variations are also within the scope of the present disclosure. Such variations are described below.

[0115] (Variant 1)

[0116] In the embodiment, the case where the time width t3 of the basic pulse group is appropriately changed according to the frequency of electrical stimulation is described, but the control unit 134 may also be able to execute a first mode (face mode) in which the time width t3 of the basic pulse group is appropriately changed according to the frequency of electrical stimulation, and a second mode (body mode) in which the time width t3 of the basic pulse group is constant regardless of the frequency.

[0117] In this case, for example, the first mode and the second mode may be switched by operating the operation unit 128 of the electrical stimulation unit 102 .

[0118] For example, the electrical stimulation device 100 may also include an appropriate sensor for detecting whether the electrical stimulation device 100 is worn on the head. When it is detected that it is worn on the head, the control unit 134 executes the first mode; when it is detected that it is not worn on the head, the control unit 134 executes the second mode.

[0119] Reference Fig.15 In this example, the electrical stimulation device 100 is provided with a touch sensor 152 on the inner side (user side) of the portion of the headband 110 that should be placed on the top of the head. In this case, if the electrical stimulation device 100 is worn on the head, the user's head contacts the touch sensor 152, so it is detected that the electrical stimulation device 100 is worn on the head.

[0120] (Variant 2)

[0121] In the embodiment, the headband 110 and the arm 112 are described as being relatively independent, but the arm may be formed integrally with the headband as a part of the headband 110. In this case, the electrical stimulation unit 102 only needs to be mounted on the headband 110 so that the mounting position can be adjusted.

[0122] (Variant 3)

[0123] Reference Fig.16 . In this modified example, a scale 156 is provided on the arm 112, and a pointer portion 158 is provided on the extension portion 118 of the headband portion 110. The pointer portion 158 cooperates with the scale 156 to indicate the installation angle of the arm 112 relative to the extension portion 118. The scale 156 is composed of a plurality of protrusions arranged at equal intervals. The pointer portion 158 is composed of a recess. In addition, the scale 156 and the pointer portion 158 may also be composed of any one of a protrusion, a recess (groove), a coating, and other methods. In addition, the scale 156 may be provided on the extension portion 118, and the pointer portion 158 may be provided on the arm 112. By providing the scale 156 on one of the arm 112 and the extension portion 118, and providing the pointer portion 158 on the other, the installation angle can be easily understood.

[0124] (Variant 4)

[0125] Although not specifically mentioned in the embodiment and the above-mentioned modified examples, the electrical stimulation unit 102 may be configured such that the mounted component 146 does not come into contact with the cheek even when the electrical stimulation device 100 is worn on the head with the electrode 126 removed.

[0126] Fig.17(a) and (b) are stereoscopic views of an electrical stimulation device 100 according to another variation. Fig.17 (a) shows a state where a pair of electrodes 126 are installed in the electrical stimulation unit 102. Fig.17 (b) shows a state where a pair of electrodes 126 are removed from the electrical stimulation unit 102.

[0127] The housing 124 of the electrical stimulation unit 102 has a ridge 124a on the inner side, that is, on the side where the electrode 126 is mounted. The ridge 124a is provided to prevent the electrical stimulation device 100 from being used when the electrode 126 is removed from the electrical stimulation unit 102.

[0128] Specifically, in the absence of the ridge 124a, if the electrical stimulation device 100 is worn on the head and used in a state where the pair of electrodes 126 are removed and the pair of mounted components 146 provided as contact portions of the housing 124 are exposed, the mounted components 146 directly contact the cheeks, and there is a risk of excessive electrical stimulation being given to the cheeks. Therefore, by providing the ridge 124a, even if the electrical stimulation device 100 is worn on the head in a state where the electrodes 126 are removed, the pair of mounted components 146 cannot contact the cheeks.

[0129] Therefore, the rib 124a may be set so that the mounted component 146 cannot contact the cheek when the electrode 126 is removed. For example, as shown in the figure, two ribs 124a may be set for each mounted component 146 in a manner of clamping the mounted component 146. For another example, a ring-shaped rib 124a surrounding all the mounted components 146 may be set. In addition, the rib 124a is configured not to protrude more than the electrode 126 so that the electrode 126 contacts the cheek when the electrode 126 is mounted. The height of the rib 124a may be determined based on experiments to avoid contact between the mounted component 146 and the cheek.

[0130] As another example, a recess may be formed in the housing 124, and the mounted member 146 may be disposed in the recess. In this case, the mounted member 146 can be prevented from contacting the cheek when the electrode 126 is removed.

[0131] Any combination of the above-described embodiments and modifications is also useful as an embodiment of the present invention. A new embodiment generated by the combination has the effects of the combined embodiments and modifications.

[0132] In addition, those skilled in the art also understand that the functions to be realized by each component described in the claims are realized by the individual components or their cooperation shown in the embodiments and modifications. For example, the central side portion of the holding portion described in the claims can also be realized by the central portion 116 of the headband portion 110 of the embodiment. In addition, for example, the end side portion of the holding portion described in the claims can also be realized by the combination of the extension portion 118 and the arm 112 of the headband portion 110 of the embodiment.

[0133] The invention embodied in the embodiment and the modified examples can be summarized into the following aspects.

[0134] (Form 1)

[0135] An electrical stimulation device, comprising:

[0136] A holding portion that can be worn on the head and is curved in the longitudinal direction; and

[0137] The two electrical stimulation parts are respectively held by the holding part at both ends of the long side direction of the holding part. When the holding part is worn on the head, it can contact the cheeks in a clamping manner and provide electrical stimulation.

[0138] When the above-mentioned holding part is worn on the head, the two electrical stimulation parts are located at a position closer to the front-back direction of the head than the extension line of the central side part of the long side direction of the above-mentioned holding part when viewed in the left-right direction of the head.

[0139] (Form 2)

[0140] According to the electrical stimulation device described in form 1,

[0141] The end portion side portion of the holding portion in the longitudinal direction is positioned more forwardly in the head front-rear direction as it approaches the end portion side.

[0142] (Form 3)

[0143] An electrical stimulation device according to form 1 or 2, wherein:

[0144] The end portion side portion of the holding portion in the longitudinal direction is located closer to the end portion side than to the center side of the head in the left-right direction.

[0145] (Form 4)

[0146] An electrical stimulation device according to any one of aspects 1 to 3, wherein:

[0147] The position of the electrical stimulation part relative to the holding part can be adjusted to a first position and a second position which is a position closer to the front side in the front-rear direction of the head than the first position.

[0148] (Form 5)

[0149] According to the electrical stimulation device described in form 4,

[0150] The second position is a position below the first position.

[0151] (Form 6)

[0152] An electrical stimulation device according to any one of aspects 1 to 5, wherein:

[0153] It also has a soft support belt.

[0154] Both ends of the support belt are separated from each other in the longitudinal direction of the holding portion and fixed to the holding portion, and when the holding portion is worn on the head, the support belt can be worn on the back of the head.

[0155] (Form 7)

[0156] According to the electrical stimulation device described in form 6,

[0157] The support belt can be adjusted in length.

[0158] (Form 8)

[0159] An electrical stimulation device, comprising:

[0160] Electrodes capable of imparting electrical stimulation to the body; and

[0161] The control unit repeatedly applies a pulse group to the above-mentioned electrodes,

[0162] The control unit changes the width of the pulse group according to the frequency of applying the pulse group.

[0163] (Form 9)

[0164] According to the electrical stimulation device described in form 8,

[0165] The control unit can switch between a first mode in which the width of the pulse group is changed according to the frequency and a second mode in which the width of the pulse group is constant regardless of the frequency.

[0166] (Form 10)

[0167] According to the electrical stimulation device described in form 9,

[0168] The electrical stimulation device can be worn on the head. When the electrical stimulation device is worn on the head, the electrodes can impart electrical stimulation to the face.

[0169] The electrical stimulation device also has a sensor.

[0170] The control unit executes the first mode when the sensor detects that the electrical stimulation device is worn on the head, and executes the second mode when the sensor does not detect that the electrical stimulation device is worn on the head.

[0171] Industrial Applicability

[0172] The present invention relates to electrical stimulation devices.

[0173] Description of Reference Numerals

[0174] 100…electrical stimulation device; 102, 102L, 102R…electrical stimulation unit; 104…holding unit; 110…headband unit; 114…support belt; 126…electrode; 134…control unit; 152…sensor.

Claims

1. An electrical stimulation device, characterized in that: have: A holding portion that can be worn on the head and is curved in the longitudinal direction; and The two electrical stimulation parts are respectively held by the holding part at both ends of the long side direction of the holding part. When the holding part is worn on the head, it can contact the cheeks in a clamping manner and provide electrical stimulation. When the holding portion is worn on the head, the two electrical stimulation portions are located forward of an extension line of a central portion in a long side direction of the holding portion in a front-rear direction of the head as viewed in the left-right direction of the head.

2. The electrical stimulation device according to claim 1, characterized in that The end portion side portion of the holding portion in the longitudinal direction is positioned more forward in the head front-rear direction as it approaches the end portion side.

3. The electrical stimulation device according to claim 2, characterized in that The end portion side portion of the holding portion in the longitudinal direction is located closer to the end portion side than to the center side in the left-right direction of the head.

4. The electrical stimulation device according to claim 1, characterized in that The position of the electrical stimulation part relative to the holding part can be adjusted to a first position and a second position which is a position closer to the front side in the front-rear direction of the head than the first position.

5. The electrical stimulation device according to claim 4, characterized in that The second position is a position below the first position.

6. The electrical stimulation device according to any one of claims 1 to 5, characterized in that: It also has a soft support belt. Both ends of the support belt are separated from each other in the longitudinal direction of the holding portion and fixed to the holding portion, and when the holding portion is worn on the head, the support belt can be worn on the back of the head.

7. The electrical stimulation device according to claim 6, characterized in that The support belt can be adjusted in length.

8. An electrical stimulation device, characterized in that: have: Electrodes capable of imparting electrical stimulation to the body; and A control unit repeatedly applies a pulse group to the electrode, The control unit changes the width of the pulse group according to the frequency of applying the pulse group.

9. The electrical stimulation device according to claim 8, characterized in that The control unit can switch between a first mode in which the width of a pulse group is changed according to the frequency and a second mode in which the width of a pulse group is constant regardless of the frequency.

10. The electrical stimulation device according to claim 9, characterized in that The electrical stimulation device can be worn on the head. When the electrical stimulation device is worn on the head, the electrodes can impart electrical stimulation to the face. The electrical stimulation device also has a sensor. The control unit executes the first mode when the sensor detects that the electrical stimulation device is worn on the head, and executes the second mode when the sensor does not detect that the electrical stimulation device is worn on the head.

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