Wearable member and electrical stimulation device

Abstract

A wearable member 102 of an electrical stimulation device 100 comprises: a wearable member main body 130 that can be worn on a prescribed body part in a state of surrounding the body part; and a band 140 for securing the wearable member main body 130 on the body part, the band 140 having one end fixed to the wearable member main body 130. In a state in which the wearable member main body 130 is worn on the body part and the wearable member main body 130 is secured to the body part by the band 140, the band 140 at least partially overlaps, with the wearable member main body 130 interposed therebetween, an electrode part 104 which is for applying electric stimulation to the body part and which is attached to a rear surface of the wearable member main body 130.

Description

Wearable body and electrical stimulation device

[0001] The present disclosure relates to a wearable body and an electrical stimulation device.

[0002] Patent Document 1 discloses a muscle stimulation device that applies electrical stimulation to a user's muscles. This muscle stimulation device causes the muscles to exercise by passing a weak current through the muscles to tense and relax them. This achieves, for example, muscle strength enhancement.

[0003] Japanese Unexamined Patent Publication No. 2022-042782

[0004] Techniques for increasing the contact pressure between the electrode part of an electrical stimulation device and the skin have not been sufficiently proposed so far.

[0005] The present disclosure has been made under such circumstances, and one of the exemplary objects of an aspect of the present disclosure is to provide a technique for increasing the contact pressure between the electrode part of an electrical stimulation device and the skin.

[0006] In order to solve the above problem, a wearable body according to an aspect of the present disclosure is a wearable body for an electrical stimulation device, comprising: a wearable body main body that can be attached to a predetermined body part in a state of surrounding the body part; and a band having one end fixed to the wearable body main body, the band being for tightening the wearable body main body onto the body part. In a state where the wearable body main body is attached to the body part and the wearable body main body is tightened onto the body part by the band, the band at least partially overlaps, via the wearable body main body, an electrode part attached to the back surface of the wearable body main body for applying electrical stimulation to the body part.

[0007] Another aspect of the present disclosure is an electrical stimulation device. This device comprises the above-described wearable body, a plurality of electrode parts provided on the back surface of the wearable body main body, and a control device that supplies electric power to the plurality of electrode parts.

[0008] It should be noted that any combination of the above components, and mutual substitutions of the components and expressions of the present disclosure between methods, devices, systems and the like are also effective as aspects of the present disclosure.

[0009] According to the present disclosure, a technique for increasing the contact pressure between the electrode part of an electrical stimulation device and the skin can be provided.

[0010] This is a diagram showing the configuration of an electrical stimulator according to an embodiment. This is a block diagram showing the functions and configuration of the control device in Figure 1. This is a flowchart showing an example of the operation of the electrical stimulator in Figure 1. This is a diagram showing cross-sectional view taken along line A-A in Figure 5. This is a diagram showing the core material of the attachment in Figure 1.

[0011] The present disclosure will be described below with reference to the drawings, based on preferred embodiments. The embodiments are illustrative and not limiting, and not all features or combinations thereof described in the embodiments are necessarily essential to the disclosure. In the embodiments and modifications, the same or equivalent components and members will be denoted by the same reference numerals, and redundant descriptions will be omitted as appropriate.

[0012] Figure 1 is a diagram showing the configuration of an electrical stimulation device 100 according to an embodiment. The electrical stimulation device 100 is an EMS (Electrical Muscle Stimulation) device that provides electrical stimulation to the user's muscles. The electrical stimulation device 100 comprises a wearable body 102, a plurality of electrode units 104, and a control device 106.

[0013] The wearable device 102 can be attached to the user's waist. When the wearable device 102 is attached to the waist, the multiple electrode parts 104 attached to the wearable device 102 come into contact with the user's skin.

[0014] Multiple electrode portions 104 are attached to the back surface of the wearer 102, that is, the surface that comes into contact with the skin. The number of electrode portions 104 can be multiple, but is not particularly limited. The multiple electrode portions 104 may be attached to the wearer 102 in a way that prevents removal, or they may be attached to the wearer 102 in a way that allows removal.

[0015] The electrode portion 104 may be an electrode that does not require a consumable gel pad, such as a resin electrode made of conductive EPDM (Ethylene Propylene Diene Monomer) rubber or conductive polyurethane. Resin electrodes can be used without water. The electrode portion 104 may also be a cloth electrode. Cloth electrodes are used after being moistened with water. The electrode portion 104 may also be a metallic electrode. Furthermore, the electrode portion 104 may be an electrode that requires a gel pad.

[0016] The control device 106 is attached to the surface of the mounting body 102, that is, the surface opposite to the back surface where the multiple electrode portions 104 are provided. The control device 106 is attached to the mounting body 102 in a manner that allows for easy attachment and removal, although this is not limited to the control device 106.

[0017] The control device 106 controls the entire electrical stimulation device 100. The control device 106, for example, supplies power to a pair of electrode units 104 to provide electrical stimulation to the user.

[0018] As a variation, the control device 106 does not have to be attached to the mounting body 102. In this case, the control device 106 and the multiple electrode units 104 may be electrically connected by a cable.

[0019] Figure 2 is a block diagram showing the functions and configuration of the control device 106 in Figure 1. Each block shown in Figure 2 can be realized in hardware terms by elements and mechanical devices, including the CPU (Central Processing Unit) of a computer, and in software terms by computer programs, etc., but here, the functional blocks realized by the cooperation of these are depicted. Therefore, it will be understood by those skilled in the art who have read this specification that these functional blocks can be realized in various forms by combinations of hardware and software.

[0020] The control device 106 further includes an operation unit 112, a contact detection unit 114, a communication unit 116, a power supply unit 118, and a control unit 120.

[0021] The operation unit 112 is located in the housing of the control device 106. When a user operates the operation unit 112, an operation signal corresponding to that operation is generated. The control unit 120 performs control based on the operation signal. The operation unit 112 may include buttons for increasing or decreasing the level of electrical stimulation.

[0022] The contact detection unit 114 detects when multiple electrode units 104 are in contact with the skin. In this embodiment, the contact detection unit 114 is configured as a current detection unit that detects the current flowing between the multiple electrode units 104. That is, when multiple electrode units 104 are in proper contact with the skin, a current flows between the multiple electrode units 104 through the skin, and skin contact can be detected by detecting this current.

[0023] The communication unit 116 communicates with an external device. The communication unit 116 may be configured as a wireless communication unit or as a wired communication unit. The purpose of communication is not particularly limited, but it may transmit the training history from the electrical stimulator 100 to the external device, or it may receive commands from the external device regarding the operation of the electrical stimulator 100 or changes to setting information.

[0024] The power supply unit 118 is electrically connected to the control unit 120 and supplies power to the control unit 120. The power supply unit 118 is preferably a secondary battery such as a lithium-ion battery, but it may also be a primary battery. Alternatively, the power supply unit 118 may be configured to receive power from a commercial power source such as AC 100V.

[0025] When the contact detection unit 114 detects that multiple electrode units 104 are in contact with the skin, the control unit 120 applies a voltage between the multiple electrode units 104, in other words, applies electrical stimulation, for a predetermined operating time (for example, 10 minutes) and a predetermined period (for example, a period with a frequency of 20 Hz), according to, for example, a motion control program.

[0026] The above describes the basic configuration of the electrical stimulation device 100. Next, its operation will be explained.

[0027] Figure 3 is a flowchart illustrating an example of the operation of the electrical stimulator 100. The electrical stimulator 100 is powered on while the user is wearing it around their waist (S102). When the control unit 120 receives an instruction to start electrical stimulation (S104), it determines whether all of the electrode units 104 are in contact with the skin based on the detection result by the contact detection unit 114 (S106). If any of the electrode units 104 are not in contact with the skin (N in S106), the control unit 120 waits for a predetermined waiting time before returning to the beginning of step S106. If the electrode units 104 are in contact with the skin (Y in S106), the control unit 120 starts applying electrical stimulation (S108). Applying electrical stimulation can promote blood flow. It is also expected that the muscles will contract continuously and become larger.

[0028] The control unit 120 determines whether or not the termination condition is met (S110). The termination condition may be, for example, that a predetermined operating time has elapsed, that the pair of electrode units 104 are no longer in contact with the skin, or that a termination instruction has been received from an external source (e.g., the user). If the termination condition is not met (N in S110), the control unit 120 waits for a predetermined waiting time and then returns the process to the beginning of S108. If the termination condition is met (Y in S110), the control unit 120 terminates the process. At this time, the power to the electrical stimulator 100 may be turned off.

[0029] Next, we will explain the electrical stimulation device 100 in more detail, focusing on the wearable body 102.

[0030] Figures 4-7 show the electrical stimulation device 100. In Figures 4 and 5, the wearable body 102 is unfolded to form a strip. Figure 4 shows the front side of the wearable body 102, and Figure 5 shows the back side of the wearable body 102. Figures 6 and 7 show the wearable body 102 in a cylindrical state when worn around the waist. Figure 6 shows the front side of the wearable body 102, and Figure 7 shows the back side of the wearable body 102. Figure 8 is a cross-sectional view taken along line A-A in Figure 5. Figure 9 shows the core material.

[0031] The mounting body 102 comprises a mounting body main body 130, a pair of left and right bands 140L and 140R for tightening the mounting body main body 130, a core material 150, and a cushioning member 160.

[0032] The main body 130 is a component worn around the waist and, as shown in Figures 4 and 5, takes the form of a strip when unfolded. A pair of connecting parts 130a, which can be connected to and disconnected from each other, are provided at both ends in the longitudinal direction of the main body 130. In the illustrated example, the pair of connecting parts 130a are wire fasteners (chucks), but are not limited to these and may be hook-and-loop fasteners, snap buttons, or other types. The main body 130 takes the form of a cylinder as shown in Figures 6 and 7 when the pair of connecting parts 130a are connected to each other. The main body 130 is worn around the waist by wrapping it around the waist so that the back surface 130b of the main body 130 is in contact with the user and the pair of connecting parts 130a are positioned in front of the user, and by connecting the pair of connecting parts 130a to each other. As a modification, the main body 130 may be formed into a cylinder shape beforehand.

[0033] The main body of the wearer 130 is formed by overlapping a design-side (front) fabric 131 and a skin-side (back) fabric 132, although this is not limited to the above. The design-side fabric 131 and the skin-side fabric 132 may each consist of one layer or multiple layers.

[0034] The skin-facing fabric 132 may include a layer made of a material with low breathability, such as polyurethane. In this case, the conductivity due to perspiration can be stabilized and the exercise effect can be improved.

[0035] The vertical width of the body 130 is not particularly limited, but it is preferable that it be relatively wide so as to reliably support the lumbar spine. For example, the body 130 may have a vertical width in the left-right central region when unfolded (i.e., the region that touches the waist when worn) that is opposite to and able to support the entire lumbar spine and at least a part of the pelvis (e.g., the sacrum). As an example, the vertical width W in the left-right central region of the body 130 may be 25 cm or more and 30 cm or less, assuming the average physique of an adult Japanese woman.

[0036] Multiple electrode portions 104 are attached to the back surface 130b of the main body 130 of the device. Therefore, the main body 130 of the device can also be considered as a component for holding the electrode portions 104.

[0037] When the main body of the wearer 130 is unfolded, a pair of electrode sections 104_1L and 104_1R for electrically stimulating the back muscles are attached to the left and right central areas. Specifically, the pair of electrode sections 104_1L and 104_1R are attached so as to extend vertically when the main body of the wearer 130 is attached to the waist.

[0038] When the body of the wearer 130 is deployed, a pair of electrode portions 104_2L and 104_2R for electrically stimulating the psoas muscle are attached to the regions at both ends. Specifically, when the body of the wearer 130 is attached, the pair of electrode portions 104_2L and 104_2R are attached so that they extend downward as they approach the pair of connection portions 130a.

[0039] The multiple electrode portions 104 may be permanently attached to the mounting body 130, or they may be permanently attached to the mounting body 130.

[0040] The pair of left and right bands 140L and 140R are bands for tightening the main body 130 of the wearer around the waist.

[0041] One end of the bands 140L and 140R is fixed to the core material 150 or the mounting body 130 in the central area between the left and right sides when the mounting body 130 is deployed.

[0042] The other end (tip) of the bands 140L and 140R is provided with a band-side engaging portion 140a on its back surface, which engages with a body-side engaging portion 130d provided on the surface 130c of the mounting body 130. The band-side engaging portion 140a is not particularly limited, but in the illustrated example, it is a hook-and-loop fastener.

[0043] The bands 140L and 140R serve to fix and stabilize the pelvis, that is, to function as a pelvic belt, and also to press the multiple electrode portions 104 against the skin.

[0044] The bands 140L and 140R include a first band portion 141, a second band portion 142, and a joining member 143 that joins the first band portion 141 and the second band portion 142.

[0045] The first band portion 141 has a lateral V-shape. It can also be considered that the first band portion 141 is composed of two upper and lower bands 141a and 141b. The second band portion 142, although not limited thereto, has a linear shape.

[0046] The first band portion 141 has stretchability in its longitudinal direction. On the other hand, in order to allow the first band portion 141 to stretch easily, the second band portion 142 does not have stretchability in its longitudinal direction. Note that "does not have stretchability" means that the portion does not stretch or contract under a force of a magnitude that a human applies when pulling. In addition, "does not stretch or contract" includes not only cases where there is no stretching or contracting at all, but also cases where slight stretching or contracting unavoidably occurs due to the material or structure. As an example, the stretch rate of the first band portion 141 may be 50% or more, and the stretch rate of the second band portion 142 may be less than 5%.

[0047] As a modified example, both the first band portion 141 and the second band portion 142 may have stretchability. In this case, the first band portion 141 may have higher stretchability than the second band portion 142.

[0048] In any case, since at least the first band portion 141 has stretchability, the waist can be tightened relatively strongly. Further, since the wearable body main body 130 can be tightened relatively strongly against the waist, the contact pressure between the plurality of electrode portions 104 and the skin can be increased.

[0049] Further, the V-shaped first band portion 141 has stretchability, and therefore when the first band portion 141 stretches, a relatively wide range can be tightened by the two upper and lower bands 141a and 141b. For example, the two upper and lower bands 141a and 141b can be tightened so as to cover the iliac bones. Thereby, the waist can be fixed more stably.

[0050] When the band 140 is tightened to the body 130, that is, when the band-side engaging portion 140a at the tip of the band 140 is fixed to the body-side engaging portion 130d of the body 130, the band 140 overlaps at least one electrode portion 104 at least partially via the body 130. In the illustrated example, the band 140 partially overlaps the electrode portion 104_1 for the back muscles via the body 130, and partially overlaps the electrode portion 104_2 for the iliopsoas muscle via the body 130. The band 140 at least partially overlaps the electrode portion 104 via the body 130, causing the electrode portion 104 to be pressed against the skin by the band 140, increasing the contact pressure between the electrode portion 104 and the skin.

[0051] Furthermore, the main body engagement portion 130d of the wearer body 130 is located on a surface that overlaps with the electrode portion 104_2 for the iliopsoas muscle, and therefore the band-side engagement portion 140a of the band 140 is fixed to the wearer body 130 so as to overlap with the electrode portion 104_2. As described above, the first band portion 141 of the band 140 is elastic, and the band 140 is fixed to the main body engagement portion 130d of the wearer body 130 when the first band portion 141 is stretched, so the main body engagement portion 130d is pulled towards the back, and as a result the electrode portion 104_2 is pressed relatively strongly against the skin, increasing the contact pressure between the electrode portion 104_2 and the skin.

[0052] The main body engagement portion 130d is located below the midpoint in the vertical direction of the end of the two bands 141a and 141b of the first band portion 141 that is opposite to the second band portion 142. In other words, the main body engagement portion 130d is located relatively low. Therefore, the user pulls the band 140 forward and downward to attach the end of the band 140 to the attachment part. That is, the user pulls the end of the band diagonally downward and forward toward the lower abdomen to attach it to the attachment part. As a result, the band 140 is fixed to the main body 130 of the wearer such that the second band portion 142 is located lower toward the front. This compresses the lower abdomen, increases abdominal pressure, and reduces the burden on the erector spinae muscles and lumbar vertebrae. It also makes it possible to press the electrode portion 104_2 for the iliopsoas muscle. Furthermore, it is possible to avoid the band 140 interfering with the control device 106.

[0053] The surface 130c of the main body 130 of the wearer is provided with a retaining engagement portion 130e for holding the band 140 when not in use. The retaining engagement portion 130e is provided, but is not limited to, in a position facing the band-side engagement portion 140a of the band 140 when the band 140 is not extended. The retaining engagement portion 130e is provided, for example, midway between the center and the end in the longitudinal direction of the wearer body 130. By fixing the band-side engagement portion 140a of the band 140 to the retaining engagement portion 130e of the wearer body 130, the band 140 does not hang down, making it easy to pick up the band 140 after wearing the wearer body 130 around the waist. Also, because the band 140 does not hang down, it looks good when not in use. Furthermore, it prevents the band 140 from getting caught on something and causing inconvenience.

[0054] When the wearer body 130 is worn around the waist, the left and right portions 130f of the lower edge that surrounds the user's buttocks are recessed upwards. In other words, they are notched. This makes it easier to lift and spread the legs even when the wearer body 130 is worn around the waist.

[0055] The core material 150 is housed within the central part of the body of the wearer 130 in the longitudinal direction. The core material 150 is housed in the cover fabric 144, and the cover fabric 144 is sewn to the skin-side fabric 132 between the design-side fabric 131 and the skin-side fabric 132. In this way, the core material 150 is fixed to the body of the wearer 130 so that it does not move within the body of the wearer 130.

[0056] The core material 150 is a relatively hard, thin plate material that does not have elasticity and has sufficient strength to bend by human force but is difficult to fold. The core material 150 is formed to be at least harder than the main body 130 of the mounting device. In this disclosure, "hard" means that it is difficult to bend when the same force is applied in the bending direction, or that a large force in the bending direction is required to bend it by a certain amount.

[0057] Furthermore, while the core material 150 is elastic, the mounting body 130 does not necessarily have to be elastic. Alternatively, both the core material 150 and the mounting body 130 may be elastic, and the core material 150 may have a higher modulus of elasticity than the mounting body 130. In this disclosure, "having elasticity" means having flexibility that allows it to be deformed in a way that restores it to its original shape. Specifically, "having elasticity" means having flexibility that allows it to be deformed in response to an external force, and having the ability to return to its original shape when the external force is removed after deformation caused by the external force. In this disclosure, "original shape" is not limited to the shape before deformation caused by the external force, but also includes the shape that is approximately the same as before deformation caused by the external force.

[0058] The material of the core material 150 is not particularly limited, but for example, it may be resin. The core material 150 may be, for example, a foamed polyethylene sheet, i.e., Belpolene. Alternatively, the core material 150 may be a silicone or urethane sheet.

[0059] The core material 150, like the main body 130 of the wearer, does not have a particularly limited vertical width, but it is preferable that the vertical width of the core material 150 be relatively wide so as to be able to reliably support the lumbar spine. For example, the core material 150 may have a vertical width that is able to face and support the entire lumbar spine and at least a part of the pelvis (e.g., the sacrum) when the wearer 102 is worn. As an example, the maximum vertical width of the core material 150 may be 20 cm or more and 25 cm or less, assuming the average physique of an adult Japanese woman.

[0060] Notches 151 are formed on both the left and right sides of the core material 150. The notches 151 include a notch 151a that extends vertically along the periphery of the core material 150, a second notch 151b that extends inward from the lower end of the first notch 151a (towards the center in the left-right direction of the core material 150) and extends left and right to the middle portion of the core material 150 in the vertical direction, and a slit-shaped third notch 151c that extends vertically from the second notch 151b, located inside the first notch 151a.

[0061] The core material 150 is separated by the second notch 151b, leaving the upper part 152 and the lower part 153 with a constricted portion 154 in the center on both sides. As a result, bending and twisting of the upper part 152 and the lower part 153 of the core material 150 relative to each other is permitted within the range in which the constricted portion 154 can deform. This allows the core material 150 to follow movements such as bending and twisting at the waist.

[0062] As described above, the core material 150 has vertically extending slit-shaped third notches 151c formed therein, and the upper part 152 and the lower part 153 can each be curved in relation to the portion between the two third notches 151c, with respect to the portion outside the third notches 151c. This allows the core material 150 to curve along the waist, enabling it to properly press against the waist. Furthermore, the outer portion of the two third notches 151c of the upper part 152 of the core material 150 faces the electrode portion 104_2, but as described above, it can be curved, allowing it to properly press against the electrode portion 104_2.

[0063] The wearer 102 may also be configured without a core material 150. In this case, instead of having a core material 150, the central area of ​​the wearer body 130 that comes into contact with the waist when worn may have a moderate hardness that maintains its surface shape without easily bending.

[0064] The cushion member 160 is provided in the central part of the longitudinal direction of the wearer body 130, that is, in the area where the middle of the waist makes contact when the wearer body 130 is worn. The cushion member 160 is a member that reduces the impact and pain when the back comes into contact with a chair or the like, in other words, a member that serves as a cushion. Therefore, the cushion member 160 can be made of any suitable material, for example, it may be made of silicone.

[0065] Next, the effects and benefits of this embodiment will be explained.

[0066] By tightening the main body 130 with the band 140, the contact pressure between the main body 130 and the multiple electrode parts 104 and the skin increases. Furthermore, as the band 140 overlaps the electrode parts 104 via the main body 130, the band 140 presses the electrode parts 104 against the skin, further increasing the contact pressure between the electrode parts 104 and the skin.

[0067] In this case, water is sometimes sprayed onto multiple electrode parts to wet them and stabilize the current flow between them. However, instead of spraying water, it is also possible to wet the multiple electrode parts by having the user sweat. In this case, the main body of the device needs to be made of a material with low breathability. Such materials with low breathability often have little or no elasticity, and in that case, depending on the relationship between the size of the main body of the device and the user's body shape, it is difficult to make the main body of the device fit snugly against the user, and therefore it is difficult to increase the contact pressure between the electrode parts and the skin. In contrast, according to this embodiment, the main body of the device 130 is tightened by the band 40, making the main body of the device 130 fit snugly against the user's skin and increasing the contact pressure between the multiple electrode parts 104 and the skin. In other words, this embodiment is particularly effective when the main body of the device 130 has little or no elasticity.

[0068] In addition, tightening the waist with the band 140 increases the intra-abdominal pressure, reducing the burden on the lumbar spine. Furthermore, when the main body 130 is tightened around the waist by the band 140, the core material 150 is pressed against the waist via the main body 130, fixing the lumbar spine to prevent excessive arching and reducing the burden on the lumbar spine. On the other hand, as described above, the core material 150 has a second notch 151b, allowing the upper part 152 and the lower part 153 to bend relative to each other. This allows the lumbar spine to be fixed in an ideal curved shape that follows the S-curve of the spine, further reducing the burden on the lumbar spine.

[0069] The present disclosure has been described above based on embodiments. These embodiments are illustrative, and it will be understood by those skilled in the art that various modifications are possible by combining their respective components and processing steps, and that such modifications are also within the scope of the present disclosure. Such modifications will be described below.

[0070] Unlike the embodiment, the first band portion 141 may have a horizontal V-shape. In this case, the same effects and advantages as when the first band portion 141 has a horizontal V-shape can be achieved. Also, unlike the embodiment, the first band portion 141 may have an I-shape, i.e., a straight line.

[0071] Unlike the embodiment, the wearable body 102 may be configured to be attachable to the abdomen, chest, arms, legs, or other body parts. In these cases, the wearable body 102 does not need to include a core material 150.

[0072] Unlike the embodiment, the wearer 102 may have only one band. For example, the wearer 102 may have one band that encircles the entire circumference of the wearer body 130.

[0073] In this embodiment, the mounting body 102 is configured to fasten a pair of left and right bands 140L and 140R to the mounting body 130, but it may also be configured to fasten the bands 140L and 140R to each other.

[0074] Unlike the embodiment, both the first band portions 141L, 141R and the second band portions 142L, 142R do not necessarily have to be elastic.

[0075] Any combination of the embodiments and modifications described above is also useful as an embodiment of this disclosure. The new embodiments resulting from these combinations possess the effects of both the combined embodiments and modifications.

[0076] [Aspect 1] An electrical stimulator attachment comprising: an attachment body that can be attached to a predetermined body part in a manner that surrounds the body part; and a band, one end of which is fixed to the attachment body, for tightening the attachment body to the body part, wherein when the attachment body is attached to the body part and the attachment body is tightened to the body part by the band, the band at least partially overlaps, via the attachment body, an electrode portion attached to the back surface of the attachment body for applying electrical stimulation to the body part.

[0077] [Aspect 2] The wearer according to aspect 1, wherein at least a portion of the band in the longitudinal direction is elastic.

[0078] [Aspect 3] The wearer according to aspect 1 or 2, wherein the band includes a first band portion at one end and a second band portion at the other end, the first band portion being elastic and the second band portion not being elastic.

[0079] [Aspect 4] The attachment according to aspect 1 or 2, wherein the band includes a first band portion at one end and a second band portion at the other end, and the first band portion is V-shaped or Y-shaped.

[0080] [Aspect 5] The wearer according to aspect 4, wherein the first band portion is elastic.

[0081] [Aspect 6] The mounting body according to aspect 2, wherein the band has a band-side engaging portion on the other end, the mounting body has a body-side engaging portion on a surface that overlaps with the electrode portion, and the band-side engaging portion and the body-side engaging portion are engaged when the band is extended.

[0082] [Aspect 7] The body part is the waist, and the body part is provided with a core material that is harder than the body part at the point where the body part is attached to the waist, according to any one of aspects 1 to 6.

[0083] [Aspect 8] An electrical stimulation device comprising: the attachment body according to any one of claims 1 to 7; a plurality of electrode portions provided on the back surface of the attachment body; and a control device for supplying power to the plurality of electrode portions.

[0084] This disclosure relates to a wearable device and an electrical stimulator.

[0085] 100 Electrical stimulator, 102 Wearable body, 104 Electrode part, 106 Control device, 130 Wearable body main body, 130d Main body side engagement part, 140 Band, 140a Band side engagement part, 141 First band part, 142 Second band part, 150 Core material.

Claims

1. An electrical stimulator attachment comprising: an attachment body that can be attached to a predetermined body part in a manner that surrounds the body part; and a band, one end of which is fixed to the attachment body, for tightening the attachment body to the body part, wherein when the attachment body is attached to the body part and the attachment body is tightened to the body part by the band, the band at least partially overlaps, via the attachment body, an electrode portion attached to the back surface of the attachment body for applying electrical stimulation to the body part.

2. The attachment according to claim 1, wherein the band includes a first band portion at one end and a second band portion at the other end, the first band portion being elastic and the second band portion not being elastic.

3. The wearer according to claim 2, wherein the first band portion is V-shaped or Y-shaped.

4. The mounting body according to claim 1, wherein the band is elastic and has a band-side engaging portion on the other end, the mounting body has a body-side engaging portion at a position on the surface that overlaps with the electrode portion, and the band-side engaging portion and the body-side engaging portion are engaged when the band is extended.

5. The body part is the waist, and the body part is provided with a core material that is harder than the body part at the point where the body part is attached to the waist, according to claim 1.

6. An electrical stimulation device comprising: the mounting body according to any one of claims 1 to 5; a plurality of electrode portions provided on the back surface of the mounting body; and a control device for supplying power to the plurality of electrode portions.

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