Low-frequency treatment instrument and low-frequency treatment instrument unit

Abstract

A low-frequency treatment instrument (1) comprises: an electrode unit for supplying a current to a body surface; and a light emission unit (50) that emits light for confirming a sticking position at which the electrode unit is stuck to the body surface. The light emission unit (50) is provided so as to be capable of emitting light that is parallel to the electrode unit in an opposing state in which the electrode unit is opposite the body surface at a distance therefrom.

Description

Low-frequency therapy device and low-frequency therapy unit

[0001] The present disclosure relates to a low frequency therapy device and a low frequency therapy device unit.

[0002] As a conventional low-frequency therapy device, Japanese Patent Application Laid-Open No. 4-197271 (Patent Document 1) discloses a low-frequency therapy device having a configuration in which multiple light-emitting diodes are provided on the top side of the housing to indicate the selected treatment mode.

[0003] Japanese Unexamined Patent Publication No. 4-197271

[0004] A low-frequency therapy device relieves stiffness and pain by contacting electrodes with the surface of the body, such as the abdomen or back, and stimulating the muscles by outputting electrical signals via the electrodes.

[0005] The surface of the body can be divided into multiple dermatomes associated with spinal nerves, and by passing electricity through specific dermatomes, the therapeutic effect can be improved.

[0006] However, when the electrode part is attached to the back, etc., it is difficult to visually check the back side, and therefore it is difficult to grasp the height position and circumferential position of the electrode part, etc. This makes it difficult to attach the electrode part in the appropriate position.

[0007] The present disclosure has been made in consideration of the above-mentioned problems, and the purpose of the present disclosure is to provide a low-frequency therapy device and a low-frequency therapy unit that can guide the electrode portion to an appropriate position on the surface of a living body.

[0008] A low-frequency therapy device according to the present disclosure includes an electrode unit for supplying a current to a body surface, and a light irradiating unit for irradiating light for confirming the position where the electrode unit is to be attached to the body surface. The light irradiating unit is configured to irradiate light parallel to the electrode unit when the electrode unit is facing the body surface at a distance.

[0009] Note that "parallel" does not only mean being completely parallel, but also means being substantially parallel, allowing for slight deviations due to manufacturing errors such as tolerances.

[0010] According to the above configuration, before attaching the electrode unit to the body surface, the light irradiating unit irradiates a predetermined object with light in a direction parallel to the electrode unit while the electrode unit is facing the body surface, and the position of the light irradiated on the object can be confirmed, thereby making it possible to confirm the position of the electrode unit. Therefore, the electrode unit can be attached to an appropriate position on the body surface.

[0011] In the low-frequency therapy device according to the present disclosure, the light irradiating section may be located on the opposite side of the electrode section from the side on which the user's body surface is located in the facing state.

[0012] According to the above configuration, when the electrode section is attached to the body surface, it is possible to prevent the light irradiating section from getting between the electrode section and the body surface.

[0013] The low-frequency therapy device according to the present disclosure may include a main body that supplies current to the electrode unit, and the light irradiation unit may be provided on the main body.

[0014] According to the above configuration, the light emitting unit can be installed in a stable position, and the position of the light irradiated from the light emitting unit can also be stabilized.

[0015] In the low-frequency therapy device according to the present disclosure, the main body may include a bottom surface facing the body surface in the facing state, and first and second side walls rising from an outer edge of the bottom surface and facing each other at a distance. The light irradiating unit may include a first light irradiating unit provided on the first side wall and a second light irradiating unit provided on the second side wall. In this case, the first light irradiating unit and the second light irradiating unit may be arranged so as to be at the same position in an orthogonal direction perpendicular to the direction in which the first and second side walls face each other.

[0016] According to the above configuration, by checking the position of the object irradiated with light from the first light irradiator installed on the first side wall and the position of the other object irradiated with light from the second light irradiator installed on the second side wall, the position of the electrode unit (more specifically, the degree of rotation) can be grasped and the position of the electrode unit can be adjusted. For example, if the direction in which the first side wall and the second side wall face each other is tilted from the horizontal, the direction in which the first side wall and the second side wall face each other can be made horizontal by adjusting the irradiation position so that the irradiation position from the first light irradiator and the irradiation position from the second light irradiator are at the same height in the vertical direction. The electrode unit can be positioned in an appropriate position.

[0017] In the low-frequency therapy device according to the present disclosure, the main body may include a bottom surface facing the body surface in the facing state, and a peripheral wall provided along an outer edge of the bottom surface. The light irradiating unit may include a first light irradiating unit provided at a first position on the peripheral wall, and a second light irradiating unit provided at a second position rotated 90 degrees circumferentially around the peripheral wall from the first position.

[0018] According to the above configuration, by checking the irradiation positions of the two lights irradiated in directions that are 90 degrees apart, it is possible to adjust the position of the electrode part while grasping the position (more specifically, the degree of rotation) of the electrode part.

[0019] The low-frequency therapy device according to the present disclosure may include a grip portion provided on the main body portion, and the grip portion may be positioned so that, when the user holds the grip portion, the light irradiated from the light irradiating portion does not strike the user's hand.

[0020] According to the above configuration, the attachment position of the electrode portion can be adjusted while gripping the grip portion.

[0021] In the low-frequency therapy device based on the present disclosure, when viewed from the normal direction of the electrode portion, the light irradiation portion may be positioned so that the light irradiated from the light irradiation portion overlaps at least a portion of the electrode portion.

[0022] According to the above configuration, light is irradiated from the light irradiation unit so as to overlap at least a portion of the electrode unit when viewed from the normal direction of the electrode unit, and therefore the position of the electrode unit can be confirmed by checking the position where the light is irradiated.

[0023] The low-frequency therapy device according to the present disclosure may include a control unit that controls the operation of the light emitting unit, and the control unit may control the light emitting unit to change from an ON state to an OFF state when a current is supplied to the electrode unit.

[0024] According to the above configuration, the light irradiation unit stops irradiating light in time with the start of treatment by the low-frequency treatment device, so that power consumption can be reduced.

[0025] A low-frequency therapy device according to the present disclosure includes the low-frequency therapy device and an auxiliary member on which an indicator for the attachment position is indicated. The attachment position can be confirmed by irradiating light from the light irradiating unit onto the auxiliary member.

[0026] According to the above configuration, the indicator for the attachment position can be confirmed by the position of the light, and the electrode portion can be disposed in a more appropriate position.

[0027] According to the present disclosure, it is possible to provide a low-frequency therapy device and a low-frequency therapy device unit that are capable of guiding an electrode portion to an appropriate position on the surface of a living body.

[0028] 1 is a perspective view showing a low-frequency therapy device according to embodiment 1. FIG. 2 is a schematic front view of a low-frequency therapy device according to embodiment 1. FIG. 3 is a view from above showing how a low-frequency therapy device according to embodiment 1 is attached to the back side. FIG. 4 is a view from the rear side showing how a low-frequency therapy device according to embodiment 1 is attached to the back side. FIG. 5 is a view showing the ON / OFF state of current supply to the light irradiation unit and electrode unit of a low-frequency therapy device according to embodiment 1. FIG. 6 is a schematic plan view of a low-frequency therapy device according to embodiment 2. FIG. 7 is a schematic plan view of a low-frequency therapy device according to embodiment 3. FIG. 8 is a schematic plan view of a low-frequency therapy device according to embodiment 4. FIG. 9 is a schematic plan view of a low-frequency therapy device according to embodiment 5. FIG. 10 is a schematic view showing a low-frequency therapy device unit according to embodiment 6.

[0029] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments described below, the same or common parts are denoted by the same reference numerals in the drawings, and the description thereof will not be repeated.

[0030] (Embodiment 1) Fig. 1 is a perspective view showing a low-frequency therapy device according to embodiment 1. Fig. 2 is a schematic front view of the low-frequency therapy device according to embodiment 1. The low-frequency therapy device 1 according to embodiment 1 will be described with reference to Figs. 1 and 2.

[0031] The low-frequency therapy device 1 includes a main body 10, electrode units 20 and 30, a holding unit 40, and a light irradiation unit 50. The low-frequency therapy device 1 supplies a low-frequency pulse current to the electrode units 20 and 30 that are in contact with the user's body surface, thereby supplying a current to the body surface and relieving the user's pain. The frequency of the low-frequency pulse current is, for example, 1 Hz or more and 1200 Hz or less.

[0032] The main body 10 includes a housing case 11 and an operation unit 19. A control unit 18 is housed inside the housing case 11. The control unit 18 is electrically connected to the above-mentioned electrode units 20 and 30 via electrical paths (not shown), and controls the current and voltage flowing through the electrode units 20 and 30. The control unit 18 also controls the operation of the light irradiation unit 50. The control unit 18 is configured by a circuit board or the like.

[0033] The operation unit 19 is provided in the housing case 11. The operation unit 19 has, for example, a measurement switch and the like. The operation unit 19 is not limited to a push switch, and may be, for example, a pressure-sensitive (resistive) or proximity (capacitive) touch panel switch or the like. Furthermore, the housing case 11 may be provided with a display unit separate from the operation unit 19.

[0034] The storage case 11 has a box-like shape. The storage case 11 has a top surface 12, a bottom surface 13, a first side wall 14, a second side wall 15, a first wall 16, and a second wall 17. The top surface 12 and the bottom surface 13 face each other in a predetermined first direction. At least a portion of the bottom surface 13 contacts a body surface 80 (see FIG. 3 ) when the low-frequency therapy device 1 is in use. The first side wall 14, the second side wall 15, the first wall 16, and the second wall 17 form peripheral walls of the storage case 11. The first side wall 14 and the second side wall 15 are arranged to rise from the outer edge of the bottom surface 13 and face each other at a distance. The first side wall 14 and the second side wall 15 face each other in a second direction perpendicular to the first direction. The first wall portion 16 and the second wall portion 17 are provided to stand upright from the outer edge of the bottom surface portion 13 and face each other at a distance. The first wall portion 16 and the second wall portion 17 face each other in a third direction that is perpendicular to the first direction and the second direction.

[0035] The electrode units 20, 30 are arranged at a distance from each other in the first direction so that the main body unit 10 is located between the electrode units 20 and 30 in a plan view. The electrode unit 20 is arranged on one side of the main body unit 10 in the first direction. The electrode unit 30 is arranged on the other side of the main body unit 10 in the first direction.

[0036] The electrode units 20, 30 are used to pass current through the user. The electrode units 20, 30 are provided so that they can be attached to the surface of the user's body using adhesive force. The electrode units 20, 30 have adhesive portions. The electrode units 20, 30 may be, for example, gel pads or layers of an adhesive layer and a conductive member. By supplying current to the electrode units 20, 30 while they are in contact with the surface of the user's body, the current can be passed through the user.

[0037] The holding unit 40 holds the electrode units 20, 30. The holding unit 40 is, for example, flexible and deformable so as to conform to the body surface. For example, insulating fabric or the like can be used as the holding unit 40.

[0038] The holding portion 40 is fixed to the main body portion 10, for example. The holding portion 40 has a first holding portion 41 and a second holding portion 42. The first holding portion 41 holds the electrode portion 20. The shape of the first holding portion 41 is substantially the same as the shape of the electrode portion 20. The second holding portion 42 holds the electrode portion 30. The shape of the second holding portion 42 is substantially the same as the shape of the electrode portion 30. The first holding portion 41 and the second holding portion 42 may be connected by a connecting portion.

[0039] The light irradiation unit 50 is configured to be able to irradiate light. The light irradiation unit 50 includes a light source and is configured to irradiate linear light. For example, laser light is irradiated from the light irradiation unit 50. A slit having an opening is disposed in front of the light source, and the laser light may be emitted in a shape corresponding to the shape of the slit opening. The opening shape may be rectangular, polygonal, or cross-shaped. The opening shape may also be an oval shape such as a circle, an ellipse, or a track shape.

[0040] The light irradiation unit 50 is provided on the main body 10. This allows the light irradiation unit 50 to be installed in a stable position, and also stabilizes the light emitted from the light irradiation unit 50. The light irradiation unit 50 includes a first light irradiation unit 51 and a second light irradiation unit 52.

[0041] The first light irradiating unit 51 is provided on the first side wall 14. The second light irradiating unit 52 is provided on the second side wall 15. The irradiation direction of the first light irradiating unit 51 and the irradiation direction of the second light irradiating unit 52 are different from each other. In the present embodiment, the second light irradiating unit 52 irradiates light in the opposite direction to the irradiation direction of the first light irradiating unit 51.

[0042] FIG. 3 is a diagram showing the state in which the low-frequency therapy device according to the first embodiment is attached to the back side, as viewed from above.

[0043] As shown in FIG. 3 , when attaching the low-frequency therapy device 1 to the back, first, the main body 10 is brought into contact with the body surface 80 on the back side. Specifically, the bottom surface 13 of the main body 10 is brought into contact with the body surface 80. In this state, the electrode units 20, 30 are spaced apart from the body surface 80. That is, the electrode units 20, 30 face the body surface 80 at a distance. In this opposing state in which the electrode units 20, 30 face the body surface 80, the light irradiating unit 50 is located on the opposite side of the electrode units 20, 30 from the side on which the body surface 80 is located. This prevents the light irradiating unit 50 from getting between the electrode units 20, 30 and the body surface 80 when attaching the electrode units 20, 30 to the body surface 80. That is, light can be reliably irradiated outward from the light irradiating unit 50.

[0044] In this opposing state, the first light irradiation unit 51 and the second light irradiation unit 52 are arranged so that they are at the same position in an orthogonal direction (the third direction) perpendicular to the direction in which the first side wall 14 and the second side wall 15 face each other (the second direction). Note that the term "same position" allows for manufacturing errors such as tolerances and means that they are substantially the same.

[0045] Fig. 4 is a view from the back side showing how the low-frequency therapy device according to the first embodiment is attached to the back. For the sake of clarity, Fig. 4 illustrates a state in which the user is not holding the low-frequency therapy device 1. When actually attaching the low-frequency therapy device 1 to the back, the user positions it while holding it with their hands. Positioning the low-frequency therapy device (more specifically, the electrode units 20 and 30) on the appropriate dermatome among multiple dermatomes enables effective treatment, so alignment of the low-frequency therapy device 1 is important.

[0046] 4, when positioning the low-frequency therapy device 1, light is emitted from the light emitting unit 50, and the position of the light irradiated on the object to be irradiated is confirmed. Here, the irradiated object is described using the walls W1 and W2 of a room as an example, but the irradiated object is not limited to the walls of a room.

[0047] The light irradiation unit 50 is provided so as to be able to irradiate light parallel to the electrode units 20, 30 in the above-described opposing state in which the electrode units 20, 30 are opposed to each other at a distance from the body surface 80. When viewed from the normal direction of the electrode units 20, 30, the light irradiation unit 50 is arranged so that the light irradiated from the light irradiation unit 50 overlaps at least a portion of the electrode units 20, 30. This makes it possible to easily confirm the positions (more specifically, the height positions) of the electrode units 20, 30 by checking the positions where the light is irradiated.

[0048] The first light irradiating unit 51 irradiates light L1 toward one side in the second direction (the side opposite to the side where the second side wall 15 is located), and the light strikes the wall W1. The second light irradiating unit 52 irradiates light L2 toward the other side in the second direction (the side opposite to the side where the first side wall 14 is located), and the light strikes the wall W2.

[0049] The user can grasp the positions (specifically, vertical height position and degree of rotation) of the electrode sections 20, 30 by checking the irradiation position P11 where the light L1 irradiated from the first light irradiation section 51 is irradiated onto the wall section W1, and the irradiation position P12 where the light L2 irradiated from the second light irradiation section 52 is irradiated onto the wall section W2.

[0050] For example, if the second direction is tilted from the horizontal, the second direction can be made horizontal by adjusting the irradiation positions P11 and P12 so that the irradiation positions P11 and P12 are at the same height in the vertical direction. Furthermore, by adjusting the vertical positions of P11 and P12 (height positions from the floor F1), the height positions of the electrode units 20 and 30 on the back side can be adjusted. In this way, the positions of the electrode units 20 and 30 can be grasped, and the electrode units 20 and 30 can be brought into contact with the body surface 80, so that the electrode units 20 and 30 can be attached in appropriate positions.

[0051] FIG. 5 is a diagram showing the ON / OFF state of current supply to the light emitting unit and the electrode unit of the low-frequency therapy device according to the first embodiment.

[0052] As shown in Fig. 5, when current is supplied to the electrode units 20 and 30, the control unit 18 controls the light irradiation unit 50 to change from an ON state to an OFF state. This stops the light irradiation unit from emitting light in time with the start of treatment with the low-frequency therapy device, thereby reducing power consumption. Furthermore, since light is irradiated from the light irradiation unit 50 during alignment, alignment can be easily performed.

[0053] (Embodiment 2) Fig. 6 is a schematic plan view of a low-frequency therapy device according to embodiment 2. A low-frequency therapy device 1A according to embodiment 2 will be described with reference to Fig. 6 .

[0054] 6, the low-frequency therapy device 1A according to the second embodiment differs from the low-frequency therapy device 1 according to the first embodiment in the position of the second light irradiating unit 52. The other configurations are almost the same.

[0055] The first light irradiator 51 is provided at a first position P1 on the peripheral wall of the main body 10, and the second light irradiator 52 is provided at a second position P2 rotated 90 degrees circumferentially of the peripheral wall from the first position P1. Specifically, for example, the first light irradiator 51 is provided on the first side wall 14, and the second light irradiator 52 is provided on the first wall 16.

[0056] Even when configured in this manner, the low-frequency therapy device 1A according to embodiment 2 can achieve substantially the same effects as the low-frequency therapy device 1 according to embodiment 1. By checking the irradiation positions of the two lights irradiated in directions that are 90 degrees apart, the positions of the electrode units 20, 30 (more specifically, the degree of rotation) can be grasped and the positions of the electrode units 20, 30 can be adjusted.

[0057] (Embodiment 3) Fig. 7 is a schematic plan view of a low-frequency therapy device according to embodiment 3. A low-frequency therapy device 1B according to embodiment 3 will be described with reference to Fig. 7 .

[0058] 7, the low-frequency therapy device 1B according to the third embodiment differs from the low-frequency therapy device 1 according to the first embodiment in that it is provided with a gripping portion 60 and that the light irradiating unit 50 includes a third light irradiating unit 53. The other configurations are substantially the same.

[0059] The first light irradiation unit 51 and the second light irradiation unit 52 are provided at 180-degree intervals in the circumferential direction of the peripheral wall portion, and the third light irradiation unit 53 is provided in the center in the circumferential direction between the first light irradiation unit 51 and the second light irradiation unit 52. The third light irradiation unit 53 is disposed at a position rotated 90 degrees in the circumferential direction from each of the first light irradiation unit 51 and the second light irradiation unit 52.

[0060] Specifically, the first light irradiator 51 is provided on the first side wall 14, and the second light irradiator 52 is provided on the second side wall 15. The third light irradiator 53 is provided on the first wall 16. The third light irradiator 53 is capable of irradiating light L3 to one side in the third direction (the side opposite to the side on which the second wall 17 is located).

[0061] Although the above description exemplifies a case in which three light irradiation units are provided, the number of light irradiation units may be two.

[0062] The gripping portion 60 is provided on the main body 10. The gripping portion 60 is, for example, a handle and has a U-shape. The gripping portion 60 is positioned so that when a user holds the gripping portion 60, the light emitted from the light emitting portion 50 does not hit the user's hand. The gripping portion 60 is provided on the second wall 17.

[0063] Even when configured in this manner, the low-frequency therapy device 1B according to embodiment 3 can achieve substantially the same effects as the low-frequency therapy device 1 according to embodiment 1. The attachment positions of the electrode units 20 and 30 can be adjusted while gripping the gripping portion 60, thereby improving convenience. Furthermore, more appropriate alignment can be achieved by aligning the electrode units 20 and 30 using the light L1, L2, and L3 from the first light irradiating unit 51, the second light irradiating unit 52, and the third light irradiating unit 53.

[0064] (Embodiment 4) Fig. 8 is a schematic plan view of a low-frequency therapy device according to embodiment 4. A low-frequency therapy device 1C according to embodiment 4 will be described with reference to Fig. 8 .

[0065] As shown in Figure 8, the low-frequency therapy device 1C according to the fourth embodiment differs from the low-frequency therapy device 1B according to the third embodiment in the position of the grip portion 60. The other configurations are almost the same. The grip portion 60 is provided on the top surface 12 of the main body 10.

[0066] Even when configured in this manner, the low-frequency therapy device 1C according to the fourth embodiment can obtain substantially the same effects as the low-frequency therapy device 1B according to the third embodiment.

[0067] (Embodiment 5) Fig. 9 is a schematic plan view of a low-frequency therapy device according to embodiment 5. A low-frequency therapy device 1D according to embodiment 5 will be described with reference to Fig. 9 .

[0068] As shown in Figure 9, the low-frequency therapy device 1D of embodiment 5 differs from the low-frequency therapy device 1B of embodiment 3 in that it does not have a third light irradiation unit 53 and in the configuration of the gripping unit 60D.

[0069] The grip portion 60D is composed of recesses 61 and 62. The recess 61 is provided in the second wall portion 17. The recess 61 is recessed toward the side where the first wall portion 16 is located. The recess 62 is provided in the first wall portion 16. The recess 62 is recessed toward the side where the second wall portion 17 is located. For example, when a user grips the main body portion 10, the user presses the recess 61 with the thumb and supports the recess 62 with the index finger, middle finger, ring finger, and little finger.

[0070] Even when configured in this manner, the low-frequency therapy device 1D according to the fifth embodiment can obtain substantially the same effects as the low-frequency therapy device 1B according to the third embodiment.

[0071] (Embodiment 6) Fig. 10 is a schematic diagram showing a low-frequency therapy unit according to embodiment 6. With reference to Fig. 10, a low-frequency therapy unit 100 according to embodiment 6 will be described.

[0072] As shown in Fig. 10, the low-frequency therapy device unit 100 according to the sixth embodiment includes a low-frequency therapy device 1 and an auxiliary member 90. The low-frequency therapy device 1 is the same as that of the first embodiment, but any of the low-frequency therapy devices according to the first to fifth embodiments described above can be used.

[0073] An indicator for the attachment position is indicated on the auxiliary member 90. The auxiliary member 90 is, for example, a poster indicating the height position from the floor F1. There may be one or more auxiliary members 90. By attaching the auxiliary member 90 to the above-mentioned wall portions W1 and W2 and checking the position of the light (L1 in FIG. 10) irradiated onto the auxiliary member 90, the position of the low-frequency therapy device 1 can be easily confirmed.

[0074] Although the above description has been given with reference to an example in which the auxiliary member 90 is provided separately from the low-frequency therapy device 1, the auxiliary member 90 may be incorporated into the low-frequency therapy device 1. Specifically, a light-transmitting section with a scale may be provided in front of the light source of the light irradiation unit 50, and the scale or other indicator may be projected onto the object to be irradiated (for example, the wall W1) by the light irradiated from the light source. In this case, the position of the low-frequency therapy device 1 can be easily confirmed by checking the position of the light irradiated on the projected image. Furthermore, since there is no need to provide the auxiliary member 90 as a separate member, costs can be reduced.

[0075] The embodiments disclosed herein are illustrative in all respects and are not restrictive. The scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope of the claims.

[0076] 1, 1A, 1B, 1C, 1D Low frequency therapy device, 10 Main body, 11 Storage case, 12 Top surface, 13 Bottom surface, 14 First side wall, 15 Second side wall, 16 First wall, 17 Second wall, 18 Control unit, 19 Operation unit, 20, 30 Electrode unit, 40 Holding unit, 41 First holding unit, 42 Second holding unit, 50 Light irradiation unit, 51 First light irradiation unit, 52 Second light irradiation unit, 53 Third light irradiation unit, 60, 60D Grip unit, 61, 62 Recess, 80 Body surface, 90 Auxiliary member, 100 Low frequency therapy device unit, F1 Floor, L1, L2, L3 Light, P1 First position, P2 Second position, P11, P12 Irradiation position, W1, W2 Wall.

Claims

1. A low-frequency therapeutic device comprising: an electrode unit for supplying electric current to a body surface; and a light irradiation unit for emitting light to confirm the position for attaching the electrode unit to the body surface, wherein the light irradiation unit is configured to be capable of emitting light parallel to the electrode unit when the electrode unit is placed facing the body surface at a distance.

2. A low-frequency therapeutic device as described in claim 1, wherein, in the opposing state, the light irradiation section is located on the opposite side of the electrode section to the side on which the user's body surface is located.

3. A low-frequency therapeutic device as described in claim 2, further comprising a main body portion that supplies current to the electrode portion, and the light irradiation portion is provided on the main body portion.

4. A low-frequency therapeutic device as described in claim 3, wherein the main body portion includes a bottom surface portion that faces the body surface in the opposing state, and a first side wall portion and a second side wall portion that rise from the outer edge of the bottom surface portion and face each other at a distance, the light irradiation portion includes a first light irradiation portion provided on the first side wall portion and a second light irradiation portion provided on the second side wall portion, and the first light irradiation portion and the second light irradiation portion are arranged so that they are positioned at the same position in an orthogonal direction perpendicular to the direction in which the first side wall portion and the second side wall portion face each other.

5. A low-frequency therapeutic device as described in claim 3, wherein the main body includes a bottom surface portion that faces the body surface in the opposing state, and a peripheral wall portion provided along the outer edge of the bottom surface portion, and the light irradiation portion includes a first light irradiation portion provided at a first position of the peripheral wall portion, and a second light irradiation portion provided at a second position rotated 90 degrees circumferentially around the peripheral wall portion from the first position.

6. A low-frequency therapeutic device as described in claim 3, further comprising a gripping portion provided on the main body portion, the gripping portion being positioned so that when a user holds the gripping portion, light irradiated from the light irradiation portion does not strike the user's hand holding the gripping portion.

7. A low-frequency therapeutic device as described in any one of claims 1 to 6, wherein, when viewed from the normal direction of the electrode portion, the light irradiation portion is positioned so that the light irradiated from the light irradiation portion overlaps at least a portion of the electrode portion.

8. A low-frequency therapeutic device as described in any one of claims 1 to 6, comprising a control unit that controls the operation of the light irradiation unit, wherein the control unit controls the light irradiation unit from an on state to an off state when current is supplied to the electrode unit.

9. A low-frequency therapy unit comprising: a low-frequency therapy device according to any one of claims 1 to 6; and an auxiliary member having an indicator of the attachment position indicated thereon, wherein the attachment position can be confirmed by irradiating light from the light irradiation section towards the auxiliary member.

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