Patent Publication Number: US-2020289813-A1

Title: Electrical treatment device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This is a continuation of International Application 2017-239616, with an international filing date of Dec. 14, 2017, and PCT/JP2018/043400 with an international filing date of Nov. 26, 2018, and filed by applicant, the disclosure of which is hereby incorporated by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to an electrical treatment device. 
     BACKGROUND ART 
     There have been known electrical treatment devices configured to relieve stiffness and pain. Such an electrical treatment device provides stimulation by outputting an electrical signal to a muscle via the electrode portion with an electrode portion in contact with a surface of a body, such as an abdomen or a back. 
     For example, JP 2016-533254 T (Patent Document 1) provides an electrical stimulation device configured to apply electrical stimulation to the body mainly for the purpose of treating a waste evacuation dysfunction. In this electrical stimulation device, a belt including a first portion configured to cover a waist from a back side and a second portion configured to cover a front lower abdomen from a front side is wrapped around the waist of a user. A plurality of electrode portions are provided to the first portion and the second portion so as to come into contact with a body surface of the user. Further, an alignment pad is provided to the first portion. By laying the alignment pad on a spine, it is possible to bring the plurality of electrode portions into contact with appropriate locations on the body surface. 
     CITATION LIST 
     Patent Literature 
     Patent Document 1: JP 2016-533254 T 
     SUMMARY OF INVENTION 
     Technical Problem 
     Although the electrical stimulation device described in Patent Document 1 is configured to be wrapped around a lower portion of a torso, the user may want to wrap the electrical stimulation device around a left lower limb or a right lower limb rather than the torso depending on treatment sites. Positions of the left lower limb and the right lower limb preferably electrically stimulated are different and thus, when one electrical stimulation device is used for both the left lower limb and the right lower limb without any measures, it is difficult to bring the electrode portions into contact with the appropriate locations on the body surface. On the other hand, when an electrical stimulation device for the left lower limb and an electrical stimulation device for the right lower limb are each manufactured, manufacturing costs increase. 
     The present disclosure has been made in view of problems such as described above, and an object of the present disclosure is to provide an electrical treatment device capable of bringing an electrode portion into contact with an appropriate location on a body surface, even when used for both a left lower limb and a right lower limb. 
     Solution to Problem 
     An electrical treatment device according to the present disclosure includes a band-like member configured to be wrappable around both a right lower limb and a left lower limb of a user, a first electrode portion and a second electrode portion supported by the band-like member such that the first electrode portion and the second electrode portion come into contact with a body surface of the user in a wrapped state obtained by wrapping the band-like member around the right lower limb or the left lower limb, and configured to deliver a current to the user, a first mark portion configured to be aligned with a specific position of the right lower limb in a case where the band-like member is wrapped around the right lower limb such that the first electrode portion is guided to a first target position of the right lower limb and the second electrode portion is guided to a second target position of the right lower limb, and a second mark portion configured to be aligned with a specific position of the left lower limb in a case where the band-like member is wrapped around the left lower limb such that the first electrode portion is guided to a third target position of the left lower limb and the second electrode portion is guided to a fourth target position of the left lower limb. 
     In the electrical treatment device according to the present disclosure described above, preferably the belt-like member has a length direction corresponding to a circumferential direction in the wrapped state and a width direction orthogonal to the length direction. In this case, the first mark portion may be provided on either a first end side or a second end side of the band-like member in the width direction, and the second mark portion may be provided on either the first end side or the second end side of the band-like member in the width direction. 
     In the electrical treatment device according to the present disclosure described above, preferably the band-like member has a length direction corresponding to a circumferential direction in the wrapped state and a width direction orthogonal to the length direction. In this case, the first mark portion and the second mark portion may be disposed offset in the length direction. 
     In the electrical treatment device according to the present disclosure described above, preferably the first electrode portion is provided, relative to a middle axis passing through a middle portion between the first mark portion and the second mark portion in the length direction and extending in the width direction, on a side where the first mark portion is positioned, and preferably the second electrode portion is provided, relative to the middle axis, on a side where the second mark portion is positioned. 
     In the electrical treatment device according to the present disclosure described above, preferably an end portion of the first electrode portion positioned closer to the second mark portion is positioned on a first center line passing through a center of the first mark portion in the width direction or, relative to the first center line, on a side opposite to a side where the second electrode portion is positioned, and preferably an end portion of the second electrode portion positioned closer to the first mark portion is positioned on a second center line passing through a center of the second mark portion in the width direction or, relative to the second center line, on a side opposite to a side where the first electrode portion is positioned. 
     In the electrical treatment device according to the present disclosure described above, preferably the band-like member includes a first main surface facing the body surface of the user in the wrapped state and a second main surface positioned on a side opposite to the first main surface. In this case, the first mark portion and the second mark portion may be provided on the second main surface. 
     The electrical treatment device according to the present disclosure described above may further include a main body portion including a current supply portion configured to supply a current to the first electrode portion and the second electrode portion and a case configured to accommodate the current supply portion in an interior of the case. In this case, preferably the case is disposed on the second main surface. Preferably, the band-like member has a length direction corresponding to a circumferential direction in the wrapped state. Further, preferably an end portion on a first side of the case in a first direction parallel to the length direction is configured to recede from the second main face as proximity toward the first side in the first direction increases, and preferably an end portion on a second side of the case in the first direction is configured to recede from the second main surface as proximity toward the second side in the first direction increases. Furthermore, preferably the first mark portion is provided on the second main surface in a portion overlapping with the end portion on the first side of the case when the case is viewed from the front, and the second mark portion is provided on the second main surface in a portion overlapping with the end portion on the second side of the case when the case is viewed from the front. 
     The electrical treatment device according to the present disclosure described above may further include a main body portion including a current supply portion configured to supply a low frequency current to the first electrode portion and the second electrode portion and a case configured to accommodate the current supply portion in an interior of the case. In this case, preferably the band-like member includes a first main surface facing the body surface of the user in the wrapped state and a second main surface positioned on a side opposite to the first main surface, and preferably the case is disposed on the second main surface. The first mark portion and the second mark portion may be provided on the main body portion. 
     In the electrical treatment device according to the present disclosure described above, the first mark portion and the second mark portion may be provided on a surface of the case in a portion different from a facing surface of the case facing the second main surface. 
     In the electrical treatment device according to the present disclosure described above, preferably the first mark portion and the second mark portion differ in design from each other. 
     In the electrical treatment device according to the present disclosure described above, preferably, in the wrapped state, a dermatome in contact with the first electrode portion on the body surface of the user and a dermatome in contact with the second electrode portion on the body surface of the user differ. 
     In the electrical treatment device according to the present disclosure described above, preferably, in a first wrapped state obtained by wrapping the band-like member below a right knee such that the first mark portion overlaps with a first virtual line passing through a center of a right patella in a length direction of the right lower limb when viewed from the front of the user, an upper end of the first electrode portion and an upper end of the second electrode portion are positioned 10 mm below a lower end of the right patella, an end portion of the first electrode portion positioned closer to the second mark portion overlaps with the first virtual line, and an end portion of the second electrode portion positioned closer to the first mark portion is positioned 30 mm away from an end portion of the first electrode portion positioned closer to the second mark portion toward an inner side of the right lower limb. Further, in a second wrapped state obtained by wrapping the band-like member below a left knee such that the second mark portion overlaps with a second virtual line passing through a center of a left patella in a length direction of the left lower limb when viewed from the front of the user, the upper end of the first electrode portion and the upper end of the second electrode portion are positioned 10 mm below a lower end of the left patella, an end portion of the second electrode portion positioned closer to the first mark portion overlaps with the second virtual line, and the end portion of the first electrode portion positioned closer to the second mark portion is positioned 30 mm away from the end portion of the second electrode portion positioned closer to the first mark portion toward an inner side of the left lower limb. 
     Advantageous Effects of Invention 
     According to the present disclosure, it is possible to provide an electrical treatment device capable of bringing an electrode portion into contact with an appropriate location on a body surface, even when used for both a left lower limb and a right lower limb. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view illustrating a wrapped state of an electrical treatment device according to an embodiment. 
         FIG. 2  is an exploded perspective view illustrating the electrical treatment device according to the embodiment. 
         FIG. 3  is a plan view illustrating a positional relationship between a first mark portion, a second mark portion, a first electrode portion, and a second electrode portion of the electrical treatment device according to the embodiment. 
         FIG. 4  is a drawing illustrating a wrapped state obtained by wrapping the electrical treatment device according to the embodiment below a right knee. 
         FIG. 5  is a drawing illustrating positions where the first electrode portion and the second electrode portion come into contact with a body surface in the wrapped state illustrated in  FIG. 4 . 
         FIG. 6  is a drawing illustrating a relationship between the positions where the first electrode portion and the second electrode portion come into contact with the body surface in the wrapped state illustrated in  FIG. 4  and dermatomes. 
         FIG. 7  is a drawing illustrating a wrapped state obtained by wrapping the electrical treatment device according to the embodiment below a left knee. 
         FIG. 8  is a drawing illustrating a relationship between the positions where the first electrode portion and the second electrode portion come into contact with the body surface in the wrapped state illustrated in  FIG. 7  and dermatomes. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Embodiments of the present disclosure will be described in detail below with reference to the drawings. Note that in the following embodiments, identical or common components are given the same reference signs in the drawings, and the descriptions thereof are not repeated. 
       FIG. 1  is a perspective view illustrating a wrapped state of an electrical treatment device according to an embodiment.  FIG. 2  is an exploded perspective view illustrating the electrical treatment device according to the embodiment. An electrical treatment device  100  according to the embodiment will be described with reference to  FIG. 1  and  FIG. 2 . 
     As illustrated in  FIG. 1  and  FIG. 2 , the electrical treatment device  100  according to the embodiment includes a main body portion  10 , a band-like member  20 , a first electrode portion  41 , a second electrode portion  42 , a first mark portion  31 , and a second mark portion  32 . 
     The electrical treatment device  100  is, for example, a low-frequency treatment device configured to relieve pain in a right lower limb or a left lower limb of a user by supplying a low-frequency pulse current to the first electrode portion  41  and the second electrode portion  42  that are in contact with a body surface of the user. The frequency of the low-frequency pulse current is, for example, from 1 Hz to 1,200 Hz. 
     The band-like member  20  is configured to be wrappable around both the right lower limb and the left lower limb of the user. The band-like member  20  has a long shape prior to being wrapped around the user. The band-like member  20  has a substantially rectangular shape when viewed planarly. 
     The band-like member  20  has a length direction (direction DR 1 ) corresponding to a circumferential direction in a wrapped state obtained by being wrapped around the right lower limb or the left lower limb, and a width direction (direction DR 2 ) orthogonal to the length direction. The band-like member  20  includes a first main surface  20   a  facing the body surface of the user in the wrapped state, and a second main surface  20   b  positioned on a side opposite to the first main surface  20   a.    
     The band-like member  20  includes a first member  21  and a second member  22 . The first member  21  and the second member  22  have flexibility. The first member  21  is a member constituting an outer circumferential side of the band-like member  20  in the wrapped state. A surface of the first member  21  corresponding to the outer circumferential side in the wrapped state (the second main surface  20   b  of the band-like member  20 ) is configured to be capable of fastening a surface fastener  25  described later. The first member  21  is provided with opening portions  27 ,  28  at positions corresponding to a first terminal  111  and a second terminal  112  of the main body portion  10  described later. 
     The second member  22  is a member constituting an inner circumferential side of the band-like member  20  in the wrapped state. A surface of the second member  22  corresponding to the inner circumferential side in the wrapped state (the first main surface  20   a  of the band-like member  20 ) is provided with the surface fastener  25 . In the wrapped state, the surface fastener  25  is fastened with the second main surface  20   b,  thereby fixing the band-like member  20  to the right lower limb or the left lower limb. 
     The second member  22  is provided with window portions  23 ,  24  at positions corresponding to the first electrode portion  41  and the second electrode portion  42 . With the window portions  23 ,  24  provided, the first electrode portion  41  and the second electrode portion  42  can be brought into contact with the body surface of the user in the wrapped state. 
     The main body portion  10  is fixed to the band-like member  20 . The main body portion  10  is positioned on the second main surface  20   b  side of the band-like member  20 . The main body portion  10  includes a current supply portion  11  and a case  12 . The current supply portion  11  supplies current to the first electrode portion  41  and the second electrode portion  42 . The current supply portion  11  is mounted on a circuit board  110 . 
     The circuit board  110  is provided with a control unit configured to control the operation of each portion of the electrical treatment device  100 . The circuit board  110  is provided with the first terminal  111  and the second terminal  112 . The first terminal  111  is electrically connected to the first electrode portion  41  via a wire portion  43  described later. The second terminal  112  is electrically connected to the second electrode portion  42  via a wire portion  44  described later. 
     The case  12  has a box shape. The case  12  accommodates the current supply portion  11  and the circuit board  110  in an interior thereof. The case  12  is disposed on the second main surface  20   b  of the band-like member  20 . 
     An end portion on a first side of the case  12  in a first direction parallel to the length direction is configured to recede from the second main surface  20   b  as proximity toward the first side in the first direction increases. As a result, a gap is formed between the end portion on the first side of the case  12  and the second main surface  20   b.    
     An end portion on a second side of the case  12  in the first direction parallel to the length direction is configured to recede from the second main surface  20   b  as proximity toward the second side in the first direction increases. As a result, a gap is formed between the end portion on the second side of the case  12  and the second main surface  20   b.    
     A power button  13  and an adjustment button  14  for adjusting an electrical stimulation strength are provided on a front side of the case  12 . 
     The first mark portion  31  is a mark configured to be aligned with a specific position of the right lower limb when the band-like member  20  is wrapped around the right lower limb such that the first electrode portion  41  is guided to a first target position of the right lower limb and the second electrode portion  42  is guided to a second target position on the right lower limb. 
     The second mark portion  32  is a mark configured to be aligned with a specific position of the left lower limb when the band-like member  20  is wrapped around the left lower limb such that the first electrode portion  41  is guided to a third target position of the left lower limb and the second electrode portion  42  is guided to a fourth target position on the left lower limb. 
     The first mark portion  31  and the second mark portion  32  are provided on the second main surface  20   b  of the band-like member  20 . As a result, when the user wraps the band-like member  20 , the first mark portion  31  and the second mark portion  32  can be easily visually recognized. As a result, the first mark portion  31  or the second mark portion  32  can be easily aligned with the specific position, as described later. 
     The first mark portion  31  and the second mark portion  32  are provided on a first end side of the band-like member  20  in the width direction. The first mark portion  31  and the second mark portion  32  are disposed offset in the length direction of the band-like member  20 . The first mark portion  31  and the second mark portion  32  are disposed side by side in the length direction of the band-like member  20 . 
     The first mark portion  31  is provided on the second main surface  20   b  in a portion overlapping with the end portion on the first side of the case  12  when the case  12  is viewed from the front. As described above, a gap is formed between the end portion on the first side of the case  12  and the second main surface  20   b.  The gap allows the user to visually recognize the first mark portion  31  when the band-like member  20  is wrapped. As a result, during wrapping, the first mark portion  31  can be aligned with the specific position on the right lower limb. On the other hand, when viewed from the front, the first mark portion  31  is hidden by the case  12 , and thus a design quality can be enhanced. 
     The second mark portion  32  is provided on the second main surface  20   b  in a portion overlapping with the end portion on the second side of the case  12  when the case  12  is viewed from the front. As described above, a gap is formed between the end portion on the second side of the case  12  and the second main surface  20   b.  The gap allows the user to visually recognize the second mark portion  32  when the band-like member  20  is wrapped. As a result, during wrapping, the second mark portion  32  can be aligned with the specific position on the left lower limb. On the other hand, when viewed from the front, the second mark portion  32  can be hidden by the case  12 , and thus a design quality can be enhanced. 
     The design of the first mark portion  31  and the design of the second mark portion  32  are different from each other. The first mark portion  31  has a design in which, for example, an outline of the letter R is placed on a background of an orange circle. The second mark portion  32  has a design in which, for example, an outline of the letter L is placed on a background of a light blue circle. 
     Note that the first mark portion  31  and the second mark portion  32  are not limited to such designs, and can be changed as appropriate as long as distinguished. For example, the first mark portion  31  and the second mark portion  32  may be formed so as to differ in shape from each other, or may be formed so as to differ in color from each other. 
     The first mark portion  31  and the second mark portion  32  may be formed by being printed on the second main surface  20   b,  or may be formed by bonding a structure. 
     The first electrode portion  41  and the second electrode portion  42  each have a polygonal shape. Note that the polygonal shape also includes shapes with rounded corners. The first electrode portion  41  and the second electrode portion  42  each have, for example, a square shape. In the first electrode portion  41  and the second electrode portion  42 , a length parallel to the length direction of the band-like member  20  is 40 mm, for example, and a length parallel to the width direction of the band-like member  20  is 40 mm, for example. 
     Note that the first electrode portion  41  and the second electrode portion  42  are not limited to a polygonal shape, and may have an oval shape, such as an elliptical shape, a long circular shape, or a racetrack shape, or a circular shape. 
     The first electrode portion  41  and the second electrode portion  42  are fixed to the first member  21  of the band-like member  20 . Specifically, the first electrode portion  41  and the second electrode portion  42  are fixed to a surface of the first member  21  in a portion facing the second member  22 . 
     The first electrode portion  41  and the second electrode portion  42  are disposed side by side in the length direction. The first electrode portion  41  and the second electrode portion  42  are exposed through the window portions  23 ,  24  of the second member  22 . Thus, the first electrode portion  41  and the second electrode portion  42  can be brought into contact with the body surface of the user in the wrapped state. 
     The first electrode portion  41  and the second electrode portion  42  are electrode portions for running a current to the user. With the first electrode portion  41  and the second electrode portion  42  in contact with the body surface of the user, a current is supplied to the first electrode portion  41  and the second electrode portion  42 , making it possible to deliver a current to the user. 
     The first electrode portion  41  and the second electrode portion  42  are electrically connected to the first terminal  111  and the second terminal  112  of the main body portion  10  via the wire portion  43  and the wire portion  44 . 
     A first end of the wire portion  43  in the length direction is connected to the first electrode portion  41 . A second end of the wire portion  43  in the length direction is connected to the first terminal  111 . A first end of the wire portion  44  in the length direction is connected to the second terminal  112 . A second end of the wire portion  44  in the length direction is connected to the second electrode portion  42 . 
       FIG. 3  is a plan view illustrating a positional relationship between the first mark portion, the second mark portion, the first electrode portion, and the second electrode portion of the electrical treatment device according to the embodiment. The positional relationship between the first mark portion  31 , the second mark portion  32 , the first electrode portion  41 , and the second electrode portion  42  will be described with reference to  FIG. 3 . 
     As illustrated in  FIG. 3 , the first electrode portion  41  is provided, relative to a middle axis ML passing through a middle portion between the first mark portion  31  and the second mark portion  32  in the length direction and extending in the width direction, on a side where the first mark portion  31  is positioned. 
     For example, an end portion of the first electrode portion  41  positioned closer to the second mark portion  32  is positioned on a first center line CL 1  passing through a center of the first mark portion  31  in the width direction or, relative to the first center line CL 1 , on a side opposite to a side where the second electrode portion  42  is positioned. 
     The second electrode portion  42  is provided, relative to the middle axis ML, on a side where the second mark portion  32  is positioned. For example, an end portion of the second electrode portion  42  positioned closer to the first mark portion  31  is positioned on a second center line CL 2  passing through a center of the second mark portion  32  in the width direction or, relative to the second center line CL 2 , on a side opposite to a side where the first electrode portion  41  is positioned. 
     With the first electrode portion  41  and the second electrode portion  42  thus disposed, the first electrode portion  41  and the second electrode portion  42  are easily guided to different dermatomes in the wrapped state, as described later. 
     For example, a distance D 1  in the length direction between the end portion of the first electrode portion  41  positioned closer to the second mark portion  32  and the middle axis ML, and a distance D 2  in the length direction between the end portion of the second electrode portion  42  positioned closer to the first mark portion  31  and the middle axis ML are equal. 
     Note that the first electrode portion  41  and the second electrode portion  42  may be provided at positions asymmetrical relative to the middle axis ML. 
     A distance in the length direction between the end portion of the first electrode portion  41  positioned closer to the second mark portion  32  and the end portion of the second electrode portion  42  positioned closer to the first mark portion  31  is, for example, 30 mm. 
       FIG. 4  is a drawing illustrating a wrapped state obtained by wrapping the electrical treatment device according to the embodiment below the right knee.  FIG. 5  is a drawing illustrating positions where the first electrode portion and the second electrode portion come into contact with the body surface in the wrapped state illustrated in  FIG. 4 . The wrapped state obtained by wrapping the electrical treatment device  100  below the right knee will be described with reference to  FIG. 4  and  FIG. 5 . 
     As illustrated in  FIG. 4 , when the electrical treatment device  100  is wrapped below the right knee, the band-like member  20  is wrapped so that the first mark portion  31  overlaps with a first virtual line VL 1  passing through a center of a right patella  215  in the length direction of the right lower limb when viewed from the front of the user and, in this state, the surface fastener  25  is fastened to the second main surface  20   b.    
     With the first mark portion  31  aligned so as to overlap with the first virtual line VL 1 , the first electrode portion  41  is guided to the first target position, and the second electrode portion  42  is guided to the second target position. 
     Specifically, when viewed from the front of the user, the first electrode portion  41  is guided so that an upper end is positioned 10 mm below a lower end of the right patella  215 , and the end portion positioned closer the second mark portion  32  is on the first virtual line VL 1  or near the first virtual line VL 1 . 
     When viewed from the front of the user, the second electrode portion  42  is guided so that an upper end is positioned 10 mm below the lower end of the right patella  215 , and the end portion positioned closer to the first mark portion  31  is positioned 30 mm away from the end portion of the first electrode portion  41  positioned closer to the second mark portion  32  toward an inner side of the right lower limb. 
       FIG. 6  is a drawing illustrating a relationship between the positions where the first electrode portion and the second electrode portion come into contact with the body surface in the wrapped state illustrated in  FIG. 4  and dermatomes. 
     The surface of the skin is known to be divided into specific areas called dermatomes (skin sensory zones). In the lower limb, the surface of the skin is divided into dermatomes L 2  to L 5  and S 1 , as illustrated in  FIG. 6 . Each area is controlled by sensory nerve fibers of one spinal nerve root, and sensory information in each area is transmitted to a specific spinal nerve root by the sensory nerve fibers. 
     With the first mark portion  31  aligned so as to overlap with the first virtual line VL 1 , the first electrode portion  41  and the second electrode portion  42  come into contact with different dermatomes on the body surface of the user in the wrapped state. Specifically, the first electrode portion  41  comes into contact with the dermatome L 4  corresponding to the first target position, and the second electrode portion  42  comes into contact with the dermatome L 3  corresponding to the second target position. That is, the dermatome in contact with the first electrode portion  41  and the dermatome in contact with the second electrode portion  42  are different from each other. In a case where a current is caused to flow with the first electrode portion  41  and the second electrode portion  42  in contact with different dermatomes, treatment can be effectively performed. 
     Note that the first electrode portion  41  preferably comes into contact with the dermatome L 4  in its entirety, but may partially come into contact with the dermatome L 5  as long as a major portion comes into contact with the dermatome L 4 . 
     In a case where a current is caused to flow with the first electrode portion  41  and the second electrode portion  42  in contact with the body surface of the user so as to be disposed at positions such as described above, it is possible to effectively achieve a pain relief effect. 
       FIG. 7  is a drawing illustrating a wrapped state obtained by wrapping the electrical treatment device according to the embodiment below the left knee.  FIG. 8  is a drawing illustrating a relationship between the positions where the first electrode portion and the second electrode portion come into contact with the body surface in the wrapped state illustrated in  FIG. 7  and dermatomes. The wrapped state obtained by wrapping the electrical treatment device  100  below the left knee will be described with reference to  FIG. 7  and  FIG. 8 . 
     As illustrated in  FIG. 7 , when the electrical treatment device  100  is wrapped below the left knee, the band-like member  20  is wrapped so that the second mark portion  32  overlaps with a second virtual line VL 2  passing through a center of a left patella  225  in the length direction of the left lower limb when viewed from the front of the user and, in this state, the surface fastener  25  is fastened to the second main surface  20   b.    
     With the second mark portion  32  aligned so as to overlap with the second virtual line VL 2 , the first electrode portion  41  is guided to the third target position, and the second electrode portion  42  is guided to the fourth target position. 
     Specifically, as illustrated in  FIG. 8 , when viewed from the front of the user, the second electrode portion  42  is guided so that an upper end is positioned 10 mm below a lower end of the left patella  225 , and the end portion positioned closer to the first mark portion  31  is on the second virtual line VL 2  or near the second virtual line VL 2 . 
     When viewed from the front of the user, the first electrode portion  41  is guided so that an upper end is positioned 10 mm below the lower end of the left patella  225 , and the end portion positioned closer to the second mark portion  32  is positioned 30 mm away from the end portion of the second electrode portion  42  positioned closer to the first mark portion  31  toward an inner side of the left lower limb. 
     With the second mark portion  32  aligned so as to overlap with the second virtual line VL 2 , the first electrode portion  41  and the second electrode portion  42  come into contact with different dermatomes on the body surface of the user in the wrapped state. Specifically, the second electrode portion  42  comes into contact with the dermatome L 4  corresponding to the fourth target position, and the first electrode portion  41  comes into contact with the dermatome L 3  corresponding to the third target position. In a case where a current is caused to flow with the first electrode portion  41  and the second electrode portion  42  in contact with different dermatomes, treatment can be effectively performed. 
     Note that the second electrode portion  42  preferably comes into contact with the dermatome L 4  in its entirety, but may partially come into contact with the dermatome L 5  as long as a major portion comes into contact with the dermatome L 4 . 
     In a case where a current is caused to flow with the first electrode portion  41  and the second electrode portion  42  in contact with the body surface of the user so as to be disposed at positions such as described above, it is possible to effectively achieve a pain relief effect. 
     As described above, in the electrical treatment device  100  according to the present embodiment, when the band-like member  20  is wrapped around the right lower limb, the first mark portion  31  is aligned with the specific position of the right lower limb, making it possible to guide the first electrode portion  41  to the first target position of the right lower limb and guide the second electrode portion  42  to the second target position on the right lower limb. Further, when the band-like member  20  is wrapped around the left lower limb, the second mark portion  32  is aligned with the specific position of the left lower limb, making it possible to guide the first electrode portion  41  to the third target position of the left lower limb and guide the second electrode portion  42  to the fourth target position on the left lower limb. Accordingly, the electrode portions of the electrical treatment device  100  can be bought into contact with appropriate locations on the body surface, even when the electrical treatment device  100  is used for both the left lower limb and the right lower limb. 
     OTHER MODIFIED EXAMPLES 
     In the embodiment described above, a case where the band-like member  20  is wrapped below the knee has been illustrated and described; however, no such limitation is intended. Within a range that does not depart from the spirit of the present invention, the band-like member  20  may be wrapped around a thigh, or may be wrapped around a shin. 
     In the embodiment described above, a case where the first mark portion  31  and the second mark portion  32  are provided on the second main surface  20   b  of the band-like member  20  has been illustrated and described; however, no such limitation is intended, and the first mark portion  31  and the second mark portion  32  may be provided to the main body portion  10 . In this case, the first mark portion  31  and the second mark portion  32  may be provided on a surface of the case  12  in a portion different from a facing surface of the case  12  facing the second main surface  20   b.  When provided at such positions, the first mark portion  31  and the second mark portion  32  are easily visually recognized by the user, and the alignment of the first mark portion  31  or the second mark portion  32  can be easily performed. 
     In the embodiment described above, a case where the first mark portion  31  and the second mark portion  32  are printed or bonded to the second main surface  20   b  has been illustrated and described; however, no such limitation is intended, and the first mark portion  31  and the second mark portion  32  may be constituted by a light source such as a lamp. 
     In the embodiment described above, a case where the first mark portion  31  and the second mark portion  32  are provided on the first end side of the band-like member in the width direction has been illustrated and described; however, no such limitation is intended. The first mark portion  31  may be provided on either the first end side or the second end side of the band-like member  20  in the width direction, and the second mark portion  32  may be provided on either the first end side or the second end side of the band-like member in the width direction. 
     For example, in a case where the first mark portion  31  is provided on the first end side of the band-like member  20  in the width direction, and the second mark portion  32  is provided on the second end side of the band-like member  20  in the width direction, when the band-like member  20  is wrapped around the right lower limb, the first mark portion  31  is aligned with a specific position (below the right patella, for example) with the first mark portion  31  positioned on the upper side and the second mark portion  32  positioned on the lower side. On the other hand, when the band-like member  20  is wrapped around the left lower limb, the band-like member  20  is turned upside down, and the second mark portion  32  is aligned with a specific position (below the left patella, for example) with the second mark portion  32  positioned on the upper side and the first mark portion  31  positioned on the lower side. In such aspects as well, the distinctive portions described in the embodiments can be combined as appropriate. 
     SUPPLEMENTARY NOTES 
     As described above, the present embodiment includes disclosures such as described below. 
     Configuration 1 
     An electrical treatment device ( 100 ) including a band-like member ( 20 ) configured to be wrappable around both a right lower limb and a left lower limb of a user, a first electrode portion ( 41 ) and a second electrode portion ( 42 ) supported by the band-like member ( 20 ) such that the first electrode portion ( 41 ) and the second electrode portion ( 42 ) come into contact with a body surface of the user in a wrapped state obtained by wrapping the band-like member ( 20 ) around the right lower limb or the left lower limb, and configured to deliver a current to the user, a first mark portion ( 31 ) configured to be aligned with a specific position of the right lower limb when the band-like member ( 20 ) is wrapped around the right lower limb such that the first electrode portion ( 41 ) is guided to a first target position of the right lower limb and the second electrode portion ( 42 ) is guided to a second target position of the right lower limb, and a second mark portion ( 32 ) configured to be aligned with a specific position of the left lower limb when the band-like member ( 20 ) is wrapped around the left lower limb such that the first electrode portion ( 41 ) is guided to a third target position of the left lower limb and the second electrode portion ( 42 ) is guided to a fourth target position of the left lower limb. 
     Configuration 2 
     The electrical treatment device according to Configuration 1, wherein the band-like member ( 20 ) has a length direction corresponding to a circumferential direction in the wrapped state, and a width direction orthogonal to the length direction, the first mark portion ( 31 ) is provided on either a first end side or a second end side of the band-like member ( 20 ) in the width direction, and the second mark portion ( 32 ) is provided on either the first end side or the second end side of the band-like member ( 20 ) in the width direction. 
     Configuration 3 
     The electrical treatment device ( 100 ) according to Configuration 1 or 2, wherein the first mark portion ( 31 ) and the second mark portion ( 32 ) are disposed offset in the length direction. 
     Configuration 4 
     The electrical treatment device ( 100 ) according to Configuration 3, wherein the first electrode portion ( 41 ) is provided, relative to a middle axis passing through a middle portion between the first mark portion ( 31 ) and the second mark portion ( 32 ) in the length direction and extending in the width direction, on a side where the first mark portion ( 31 ) is positioned, and the second electrode portion ( 42 ) is provided, relative to the middle axis, on a side where the second mark portion ( 32 ) is positioned. 
     Configuration 5 
     The electrical treatment device ( 100 ) according to Configuration 4, wherein an end portion of the first electrode portion ( 41 ) positioned closer to the second mark portion ( 32 ) is positioned on a first center line passing through a center of the first mark portion ( 31 ) in the width direction or, relative to the first center line, on a side opposite to a side where the second electrode portion ( 42 ) is positioned, and an end portion of the second electrode portion ( 42 ) positioned closer to the first mark portion ( 31 ) is positioned on a second center line passing through a center of the second mark portion ( 32 ) in the width direction or, relative to the second center line, on a side opposite to a side where the first electrode portion ( 41 ) is positioned. 
     Configuration 6 
     The electrical treatment device ( 100 ) according to any one of Configurations 1 to 5, wherein the band-like member ( 20 ) includes a first main surface ( 20   a ) facing the body surface of the user in the wrapped state, and a second main surface ( 20   b ) positioned on a side opposite to the first main surface ( 20   a ), and the first mark portion ( 31 ) and the second mark portion ( 32 ) are provided on the second main surface ( 20   b ). 
     Configuration 7 
     The electrical treatment device ( 100 ) according to Configuration 6, further including a main body portion ( 10 ) including a current supply portion ( 11 ) configured to supply a current to the first electrode portion ( 41 ) and the second electrode portion ( 42 ), and a case ( 12 ) configured to accommodate the current supply portion ( 11 ) in an interior of the case ( 12 ), wherein the case ( 12 ) is disposed on the second main surface ( 20   b ), an end portion on a first side of the case ( 12 ) in a first direction parallel to the length direction is configured to recede from the second main face ( 20   b ) as proximity toward the first side in the first direction increases, an end portion on a second side of the case ( 12 ) in the first direction is configured to recede from the second main surface ( 20   b ) as proximity toward the second side in the first direction increases, the first mark portion ( 31 ) is provided on the second main surface ( 20   b ) in a portion overlapping with the end portion on the first side of the case ( 12 ) when the case ( 12 ) is viewed from the front, and the second mark portion ( 32 ) is provided on the second main surface ( 20   b ) in a portion overlapping with the end portion on the second side of the case ( 12 ) when the case ( 12 ) is viewed from the front. 
     Configuration 8 
     The electrical treatment device ( 100 ) according to any one of Configurations 1 to 5, further including a main body portion ( 10 ) including a current supply portion ( 11 ) configured to supply a current to the first electrode portion ( 41 ) and the second electrode portion ( 42 ), and a case ( 12 ) configured to accommodate the current supply portion ( 11 ) in an interior of the case ( 12 ), wherein the band-like member ( 20 ) includes a first main surface ( 20   a ) facing the body surface of the user in the wrapped state, and a second main surface ( 20   b ) positioned on a side opposite to the first main surface ( 20   a ), the case ( 12 ) is disposed on the second main surface ( 20   b ), and the first mark portion ( 31 ) and the second mark portion ( 32 ) are provided to the main body portion ( 10 ). 
     Configuration 9 
     The electrical treatment device ( 100 ) according to Configuration 8, wherein the first mark portion ( 31 ) and the second mark portion ( 32 ) are provided on a surface of the case ( 12 ) in a portion different from a facing surface of the case ( 12 ) facing the second main surface ( 20   b ). 
     Configuration 10 
     The electrical treatment device ( 100 ) according to any one of Configurations 1 to 9, wherein the first mark portion ( 31 ) and the second mark portion ( 32 ) differ in design from each other. 
     Configuration 11 
     The electrical treatment device according to any one of Configurations 1 to 10, wherein in the wrapped state, a dermatome in contact with the first electrode portion ( 41 ) on the body surface of the user and a dermatome in contact with the second electrode portion ( 42 ) on the body surface of the user differ. 
     Configuration 12 
     The electrical treatment device according to any one of Configurations 1 to 10, wherein in a first wrapped state obtained by wrapping the band-like member ( 20 ) below a right knee such that the first mark portion ( 31 ) overlaps with a first virtual line passing through a center of a right patella in a length direction of the right lower limb when viewed from the front of the user, an upper end of the first electrode portion ( 41 ) and an upper end of the second electrode portion ( 42 ) are positioned 10 mm below a lower end of the right patella, an end portion of the first electrode portion ( 41 ) positioned closer to the second mark portion ( 32 ) overlaps with the first virtual line, and an end portion of the second electrode portion ( 42 ) positioned closer to the first mark portion ( 31 ) is positioned 30 mm away from an end portion of the first electrode portion ( 41 ) positioned closer to the second mark portion ( 32 ) toward an inner side of the right lower limb, and in a second wrapped state obtained by wrapping the band-like member ( 20 ) below a left knee such that the second mark portion ( 32 ) overlaps with a second virtual line passing through a center of a left patella in a length direction of the left lower limb when viewed from the front of the user, the upper end of the first electrode portion ( 41 ) and the upper end of the second electrode portion ( 42 ) are positioned 10 mm below a lower end of the left patella, an end portion of the second electrode portion ( 42 ) positioned closer to the first mark portion ( 31 ) overlaps with the second virtual line, and the end portion of the first electrode portion ( 41 ) positioned closer to the second mark portion ( 32 ) is positioned 30 mm away from the end portion of the second electrode portion ( 42 ) positioned closer to the first mark portion ( 31 ) toward an inner side of the left lower limb. 
     The embodiments described herein are illustrative in all respects and are not intended as limitations. The scope of the present invention is indicated by the claims and includes all meaning equivalent to the scope and changes within the scope. 
     REFERENCE SIGNS LIST 
     
         
           10  Main body portion 
           11  Current supply portion 
           12  Case 
           13  Power button 
           14  Adjustment button 
           20  Band-like member 
           20   a  First main surface 
           20   b  Second main surface 
           21  First member 
           22  Second member 
           23 ,  24  Window portion 
           25  Surface fastener 
           27 ,  28  Opening portion 
           31  First mark portion 
           32  Second mark portion 
           41  First electrode portion 
           42  Second electrode portion 
           43 ,  44  Wire portion 
           100  Electrical treatment device 
           110  Circuit board 
           111  First terminal 
           112  Second terminal 
           215  Right patella 
           225  Left patella