Magnetic therapeutic device

Abstract

To provide a magnetic therapeutic device capable of suppressing an occurrence of problems such as inflammation and blister on the skin directly under a magnet when used by being stuck to the skin of a human body.SOLUTION: A magnetic therapeutic device 1 is used by being stuck to the skin of a human body. The magnetic therapeutic device 1 includes a magnet 2 and an adhesive sheet 3 stuck to the magnet 2. The adhesive sheet 3 includes a flexible support sheet 31 and an adhesive layer 32 provided on one surface of the support sheet 31. Holding power of the adhesive layer 32 is larger than 0 minute and 12.5 minutes or less.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a magnetic therapy device. [Background technology]

[0002] Conventionally, magnetic therapy devices have been used that are attached to the skin of the human body to exert a magnetic therapeutic effect on the human body, as disclosed in, for example, Patent Document 1. The magnetic therapy device of Patent Document 1 includes a magnet and an adhesive sheet that is attached to the magnet, and is used by attaching the magnet to the skin of the human body via the adhesive sheet.

[0003] It is known that adhesive sheets applied to the skin of the human body, including not only adhesive sheets used in magnetic therapy devices but also general bandages, generate tension blisters near the edge of the adhesive sheet when applied to the skin of the human body. In order to suppress the generation of such tension blisters, it is desirable to use an adhesive sheet made of a material that is highly elastic and has a high retention force. An adhesive sheet made of a material that is highly elastic and has a high retention force can expand and contract in accordance with the movement of the skin of the human body, thereby reducing irritation to the skin and suppressing the generation of tension blisters. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-296455 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a magnet is attached to human skin using an adhesive sheet that can stretch and contract to conform to the skin of the human body, problems such as inflammation and blisters can sometimes occur on the skin directly under the magnet. Because such problems occur even when an adhesive sheet that can suppress the occurrence of tension blisters is used, it is believed that they arise through a mechanism different from that of tension blisters.

[0006] The present invention has been made in consideration of the above problems, and aims to provide a magnetic therapy device that, when attached to the skin of the human body and used, can suppress problems such as inflammation and blisters on the skin directly beneath the magnet. [Means for solving the problem]

[0007] The magnetic therapy device of the present invention is a magnetic therapy device that is attached to the skin of the human body when used, and is characterized in that the magnetic therapy device comprises a magnet and an adhesive sheet that is attached to the magnet, the adhesive sheet comprises an elastic support sheet and an adhesive layer provided on one side of the support sheet, and the holding power of the adhesive layer is greater than 0 minutes and less than 12.5 minutes. Effect of the Invention

[0008] According to the present invention, a magnetic therapy device can be provided that, when attached to the skin of the human body, can suppress problems such as inflammation and blisters on the skin directly under the magnet. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view of a magnetic therapy device according to an embodiment of the present invention; [Diagram 2] 2 is a cross-sectional view of the magnetic therapy device of FIG. 1 taken along line II-II. [Diagram 3] FIG. 1 is a schematic diagram showing the movement of a conventional magnetic therapy device when the skin is stretched in a state where the magnetic therapy device is attached to the skin of a human body. [Figure 4] 2 is a schematic diagram showing the movement of the magnetic therapy device of FIG. 1 when the skin is stretched in a state where the magnetic therapy device is attached to the skin of a human body. [Diagram 5] FIG. 1 is a schematic diagram showing a retention test. [Figure 6] FIG. 2 is a schematic diagram showing an adhesive strength test. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a magnetic therapy device according to an embodiment of the present invention will be described with reference to the accompanying drawings. However, the following embodiment is merely an example, and the magnetic therapy device of the present invention is not limited to the following example.

[0011] As shown in Fig. 1, the magnetic therapy device 1 of this embodiment includes a magnet 2 and an adhesive sheet 3 attached to the magnet 2. As shown in Fig. 4, the magnetic therapy device 1 is attached to the skin S of the human body so that the magnet 2 comes into direct (or indirect) contact with the skin S of the human body when used. When attached to the skin S of the human body, the magnetic therapy device 1 exerts a magnetic field inside the human body, and brings about magnetic therapy effects such as promoting blood circulation in the part of the human body where it is attached and the surrounding area, and improving metabolism. The position where the magnetic therapy device 1 is attached is not particularly limited as long as it is a position where the magnetic therapy effect is exerted, and may be any position of the human body such as the shoulder, arm, neck, waist, or leg.

[0012] The magnet 2 has two magnetic poles (N pole, S pole) and generates magnetic field lines that can exert a magnetic therapeutic effect on the human body. In this embodiment, the magnet 2 has a magnetic pole direction along a direction perpendicular to the adhesive surface (the surface to which the magnet 2 is attached) of the adhesive sheet 3 (hereinafter, referred to as "height direction HD", see FIG. 2) in a state where the magnet 2 is attached to the adhesive sheet 3. By having a magnetic pole direction along the height direction HD, the magnet 2 is arranged so that the magnetic pole direction faces a direction substantially perpendicular to the surface of the skin S of the human body when the magnet 2 is attached and used so that a part of the magnet 2 opposite to the adhesive surface (for example, a top end portion 2b described later) faces the surface of the skin S of the human body, as shown in FIG. 4 for example. In this way, the magnetic pole direction of the magnet 2 extends substantially perpendicular to the surface of the skin S of the human body, and thus the magnetic field strength in a direction substantially perpendicular to the surface of the skin S is increased compared to the case where the magnetic pole direction extends parallel to the surface of the skin S, and the magnetism can be applied from the surface of the skin S to a deeper part of the body. However, the magnet 2 only needs to be able to generate magnetic field lines that can have a magnetic therapeutic effect on the human body, and the magnetic pole direction may be inclined from the height direction HD.

[0013] The magnet 2 is not particularly limited in shape as long as it can generate magnetic lines of force that can exert a magnetic therapeutic effect on the human body. In this embodiment, as shown in FIG. 1 and FIG. 2, the magnet 2 has a bottom surface 2a and an apex end 2b, and is formed in a substantially conical shape that decreases in diameter from the bottom surface 2a to the apex end 2b. By forming the magnet 2 in a substantially conical shape, the magnetic lines of force can be concentrated at the apex end 2b of the magnet 2, and the magnetic force in the vicinity of the apex end 2b can be increased. In addition, the bottom surface 2a of the magnet 2 is formed in a substantially flat shape. This makes it possible to prevent the adhesive sheet 3 attached to the bottom surface 2a of the magnet 2 from peeling off from the magnet 2. However, the magnet 2 may have a shape other than a substantially conical shape, such as a substantially circular or rectangular flat plate shape, or a substantially disc shape with a thick center portion, and the surface to which the adhesive sheet 3 is attached may be curved.

[0014] The size of the magnet 2 is not particularly limited, but is preferably set so that when the magnet 2 is attached to the skin S of the human body, it can exert a magnetic force over as wide an area as possible while minimizing irritation to the skin S of the human body as much as possible. For example, from the viewpoint of exerting a magnetic force over a wide area, the length of the magnet 2 in the direction perpendicular to the height direction HD (hereinafter referred to as the "width direction WD", see FIG. 2) is preferably 4.0 mm or more, more preferably 4.6 mm or more, and even more preferably 5.2 mm or more. Alternatively, from the same viewpoint, the area of ​​the magnet 2 when viewed in the height direction HD (within the plane including the width direction WD) is preferably 12.6 mm or more. 2 It is preferable that the thickness is 16.6 mm or more. 2 More preferably, it is 21.2 mm or more. 2 For example, from the viewpoint of reducing irritation to the skin S of the human body, the length of the magnet 2 in the width direction WD is preferably 12.0 mm or less, more preferably 11.0 mm or less, and even more preferably 10.0 mm or less. Alternatively, from the same viewpoint, the area when viewed in the height direction HD (within the plane including the width direction WD) is 113.0 mm or less. 2 It is preferable that the length is less than 95.0 mm. 2More preferably, it is 78.5 mm or less. 2 Even more preferably, it is:

[0015] The height of the magnet 2 is not particularly limited, but is preferably set so that when the magnet 2 is attached to the skin S of the human body, it can exert as large a magnetic force as possible while minimizing irritation to the skin S of the human body as much as possible. For example, from the viewpoint of exerting a large magnetic force, the length of the magnet 2 in the height direction HD is preferably 1.5 mm or more, more preferably 2.0 mm or more, and even more preferably 2.5 mm or more. Also, for example, from the viewpoint of reducing irritation to the skin S of the human body, the length of the magnet 2 in the height direction HD is preferably 4.5 mm or less, more preferably 4.0 mm or less, and even more preferably 3.5 mm or less.

[0016] The magnet 2 may be made of any material that can generate magnetic lines of force that can have a magnetic therapeutic effect on the human body, and the material is not particularly limited. The magnet 2 may be, for example, a so-called bonded magnet in which magnetic powder is mixed with a resin base material. As the bonded magnet, a bonded magnet in which ferrite magnet powder is mixed with ethylene resin may be used. By making the magnet 2 a bonded magnet, the magnet 2 can be easily formed into a desired shape. When the magnet 2 is a bonded magnet, elastic resins such as silicone resins and urethane resins may be used as a base material other than ethylene resin, and magnetic powders such as neodymium magnets and samarium cobalt magnets may be used as magnetic powders other than ferrite magnets. However, the magnet 2 may be a sintered magnet in which magnetic powders such as ferrite magnets, neodymium magnets, and samarium cobalt magnets are sintered. The magnetic force of the magnet 2 is set to be 200 mT or less, which is the certification standard of the Ministry of Health, Labor and Welfare, on the surface of the skin S when the magnet 2 is attached to the surface of the skin S.

[0017] As shown in FIG. 4, the adhesive sheet 3 is attached to the skin S of the human body, thereby attaching the magnet 2 to the skin S of the human body and supporting the magnet 2. The adhesive sheet 3 has an area larger than the magnet 2, and the outer portion of the width direction WD of the portion to which the magnet 2 is attached is attached to the skin S of the human body, thereby attaching the magnet 2 to the skin S of the human body. The adhesive sheet 3 is not particularly limited as long as it has a strength sufficient to support the magnet 2, and can be formed so that, for example, the 50% tensile strength is 4.5 N / 24 mm or more and 7.5 N / 24 mm or less in the longitudinal direction (MD) and 2.5 N / 24 mm or more and 6.0 N / 24 mm or less in the transverse direction (CD). As shown in FIG. 2, the adhesive sheet 3 includes a support sheet 31 having elasticity and an adhesive layer 32 provided on one side of the support sheet 31.

[0018] The support sheet 31 is a member that supports the magnet 2 in a state in which the adhesive sheet 3 is attached to the skin S of the human body together with the magnet 2. The support sheet 31 has an area at least larger than the magnet 2, and supports the magnet 2 so as to press the magnet 2 against the skin S of the human body by attaching the outer portion of the magnet 2 in the width direction WD to the skin S of the human body with the adhesive layer 32. The support sheet 31 is stretchable and can stretch in accordance with the movement of the skin of the human body, thereby reducing irritation to the skin and suppressing the occurrence of tension blisters near the end of the adhesive sheet 3.

[0019] The material constituting the support sheet 31 is not particularly limited as long as it has elasticity and strength to support the magnet 2. For example, the material of the support sheet 31 can be one or more of polyurethane, polyester, polyamide, polyolefin, etc. The support sheet 31 can be formed, for example, as a woven fabric, nonwoven fabric, knitted fabric, film, etc. made of the above materials. Among them, from the viewpoint of reducing irritation to the skin and ensuring breathability, it is preferable that the support sheet 31 contains a urethane nonwoven fabric.

[0020] The size of the support sheet 31 is not particularly limited, but is preferably set so that when the adhesive sheet 3 is attached to the skin S of the human body together with the magnet 2, the magnet 2 can be stably supported on the skin S, and the occurrence of problems such as skin inflammation and blisters directly below the magnet 2, which will be described in detail below, can be suppressed as much as possible. For example, from the viewpoint of more stably supporting the magnet 2 on the skin S, the length of the support sheet 31 in the width direction WD is preferably 15.0 mm or more, more preferably 18.0 mm or more, and even more preferably 22.0 mm or more. Alternatively, from the same viewpoint, the area when viewed in the height direction HD (within the plane including the width direction WD) is 176.6 mm or more. 2 It is preferable that the length is 254.3 mm or more. 2 More preferably, it is 379.9 mm or more. 2 It is even more preferable that the length of the support sheet 31 in the width direction WD is 29.0 mm or less, more preferably 26.0 mm or less, and even more preferably 23.0 mm or less, from the viewpoint of suppressing the occurrence of problems such as skin inflammation and blisters directly under the magnet 2. Alternatively, from the same viewpoint, the area of ​​the support sheet 31 as viewed in the height direction HD (within the plane including the width direction WD) is 841.0 mm or less. 2 It is preferable that the length is less than 676.0 mm. 2 More preferably, it is 529.0 mm or less. 2 Even more preferably, it is:

[0021] The thickness of the support sheet 31 is not particularly limited, but is set so that when the adhesive sheet 3 is attached to the skin S of the human body together with the magnet 2, it has the strength to stably support the magnet 2 on the skin S, and has the flexibility to deform following the movement of the skin S of the human body. For example, from the viewpoint of ensuring a predetermined strength, the thickness of the adhesive sheet 3 including the support sheet 31 and the adhesive layer 32 is preferably 0.1 mm or more, more preferably 0.2 mm or more, and even more preferably 0.3 mm or more. Also, for example, from the viewpoint of ensuring a predetermined flexibility, the thickness of the adhesive sheet 3 including the support sheet 31 and the adhesive layer 32 is preferably 0.7 mm or less, more preferably 0.6 mm or less, and even more preferably 0.5 mm or less.

[0022] The adhesive layer 32 is a layer that attaches the magnet 2 to the support sheet 31 and attaches the support sheet 31 to the skin S of the human body. In this embodiment, the adhesive layer 32 is provided on the entire surface of one side of the support sheet 31, but may be provided on a part of one side of the support sheet 31. The adhesive layer 32 is formed so that the holding power of the adhesive layer 32 is 12.5 minutes or less when measured by a holding power test based on JIS Z0237. The holding power test is performed based on JIS Z0237, and specifically, as shown in FIG. 5, the adhesive sheet 3 having a width of about 12 mm and a length of about 150 mm is attached to a covering plate P (SUS304 steel plate) at its upper end side by attaching a weight W of 500 g to its lower end side, and the time until the adhesive sheet 3 peels off is measured. At this time, the time (retention time) until the adhesive sheet 3 peels off is regarded as the holding power of the adhesive layer 32. The shorter the retention time, the weaker the holding power, and the longer the retention time, the stronger the holding power.

[0023] As described above, by setting the holding power of the adhesive layer 32 to 12.5 minutes or less, when the magnetic therapy device 1 is attached to the skin S of the human body and used, problems such as inflammation and blisters can be suppressed on the skin directly under the magnet 2. This is thought to be because, by setting the holding power of the adhesive layer 32 to a predetermined value or less, the adhesive sheet 3 is suppressed from being displaced in accordance with the expansion and contraction of the skin S, and the irritation to the skin S by the magnet 2 is reduced. This will be explained more specifically with reference to Figs. 3 and 4. Fig. 3 shows the movement of the conventional magnetic therapy device 101, in which the holding power of the adhesive layer is greater than a predetermined value, when the skin S is stretched, and Fig. 4 shows the movement of the magnetic therapy device 1 of the present embodiment, in which the holding power of the adhesive layer is less than the above-mentioned predetermined value, when the skin S is stretched. As shown in Fig. 3, in the conventional magnetic therapy device 101, when the skin S expands in the width direction WD in the direction of the arrow, the adhesive sheet 103 expands in the width direction WD following the expansion of the skin S because the adhesive layer has a large holding force (see the two-dot chain line in Fig. 3). As a result, the magnet 102 is largely displaced toward the skin S by the adhesive sheet 103 and presses against the skin S (see the two-dot chain line in Fig. 3). When the skin S subsequently contracts in the width direction WD in the direction opposite to the arrow, the adhesive sheet 103 returns to its original position, and the magnet 102 is displaced to the opposite side of the skin S by the pressing force of the skin S (see the solid line in Fig. 3). When the skin S repeatedly expands and contracts, the magnet 102 repeatedly moves up and down in the height direction HD relative to the skin S, and it is considered that the magnet 102 stimulates the skin S, causing problems such as inflammation and blisters on the skin S directly below the magnet 102. In contrast, as shown in Fig. 4, in the magnetic therapy device 1 of this embodiment, the holding power of the adhesive layer is set within a predetermined range, so even if the skin S expands and contracts, the adhesive sheet 3 shifts relative to the skin S, suppressing the displacement of the adhesive sheet 3 following the skin S, and accordingly the displacement of the magnet 2 (see the two-dot chain line in Fig. 4). This reduces irritation of the skin S by the magnet 2, and is thought to be able to suppress problems such as inflammation and blisters on the skin S directly under the magnet 2.

[0024] From the viewpoint of further suppressing the occurrence of problems such as inflammation and blisters on the skin S directly under the magnet 2, the holding power of the adhesive layer 32 is more preferably 11.5 minutes or less, and even more preferably 10.5 minutes or less. The holding power of the adhesive layer 32 can be adjusted by appropriately adjusting the type and amount of the material constituting the adhesive layer 32, the type and amount of the crosslinking agent added to the adhesive layer 32, and the like. The lower limit of the holding power of the adhesive layer 32 is set to a value greater than 0 minutes, as long as the adhesive layer 32 has a holding power that does not cause the magnetic therapy device 1 to peel off from the skin S due to the weight of the magnetic therapy device 1 over a predetermined period of use when the magnetic therapy device 1 is attached to the skin S of the human body. From the viewpoint of more stably supporting the magnet 2 by the adhesive sheet 3, the holding power of the adhesive layer 32 can be set to, for example, 4.0 minutes or more, and among them, 7.0 minutes or more is preferable, 9.0 minutes or more is more preferable, and 9.5 minutes or more is even more preferable.

[0025] From the viewpoint of more stably supporting the magnet 2 by the adhesive sheet 3, the adhesive strength of the adhesive layer 32, as measured in an adhesive strength test conforming to JIS Z0237, is preferably 2.5 N / 24 mm or more, more preferably 2.8 N / 24 mm or more, and even more preferably 3.0 N / 24 mm or more. From the viewpoint of keeping the holding power of the adhesive layer 32 low and further suppressing problems such as inflammation and blisters on the skin S directly under the magnet 2, the adhesive strength of the adhesive layer 32 is preferably 3.5 N / 24 mm or less, more preferably 3.3 N / 24 mm or less, and even more preferably 3.2 N / 24 mm or less. The adhesive strength test is performed in accordance with JIS Z0237, specifically, as shown in Fig. 6, an adhesive sheet 3 with a width of about 24 mm is bent at about 90° and attached to an adherend P (SUS304 steel plate), and the free end of the adhesive sheet 3 is pulled in a direction away from the adherend P (see the arrow in Fig. 6) to measure the strength (tensile strength) at which the adhesive sheet 3 begins to peel off. The tensile strength measured at this time is regarded as the adhesive strength of the adhesive layer 32. The greater the tensile strength, the greater the adhesive strength, and the smaller the tensile strength, the weaker the adhesive strength.

[0026] The adhesive layer 32 may have any material as long as its holding power is greater than 0 minutes and less than or equal to 12.5 minutes. Examples of the material that constitutes the adhesive layer 32 include one or more of an acrylic adhesive, a urethane adhesive, a rubber adhesive, and a silicone adhesive. Of these, it is preferable that the adhesive layer 32 contains an acrylic adhesive.

[0027] The amount of adhesive contained in the adhesive layer 32 is not particularly limited, and is appropriately set according to the type of adhesive so that the holding power of the adhesive layer 32 is greater than 0 minutes and less than or equal to 12.5 minutes. For example, when an acrylic adhesive is selected as the adhesive for the adhesive layer 32, the amount of adhesive contained in the adhesive layer 32 is 25 g / m 2 More than 40g / m 2 Less than 30 g / m 2More than 40g / m 2 less than 32 g / m 2 More than 38g / m 2 less than 34 g / m 2 More than 36g / m 2 can be set to less than

[0028] In order to more stably support the magnet 2 and to further suppress the occurrence of problems such as inflammation and blisters on the skin S directly below the magnet 2, the adhesive sheet 3 preferably has an area within a range of a predetermined ratio to the area of ​​the magnet 2 (area in the plane including the width direction WD). From the viewpoint of more stably supporting the magnet 2, the area (area in the plane including the width direction WD) of the adhesive sheet 3 (the adhesive surface) is preferably 5 times or more, more preferably 6 times or more, and even more preferably 7 times or more, of the area of ​​the magnet 2 (area in the plane including the width direction WD). In addition, from the viewpoint of further suppressing the occurrence of problems such as inflammation and blisters on the skin S directly below the magnet 2, the area (area in the plane including the width direction WD) of the adhesive sheet 3 (the adhesive surface) is preferably 10 times or less, more preferably 9 times or less, and even more preferably 8 times or less, of the area of ​​the magnet 2 (area in the plane including the width direction WD).

[0029] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. Note that the above embodiment mainly describes the invention having the following configuration.

[0030] (1) A magnetic therapy device that is attached to the skin of a human body, the magnetic therapy device comprising a magnet and an adhesive sheet that is attached to the magnet, the adhesive sheet comprising an elastic support sheet and an adhesive layer provided on one side of the support sheet, the adhesive layer having a holding power greater than 0 minutes and less than 12.5 minutes.

[0031] (2) The magnetic therapy device described in (1), wherein the adhesive strength of the adhesive layer is 2.5 N / 24 mm or more and 3.5 N / 24 mm or less.

[0032] (3) A magnetic therapy device as described in (1) or (2), in which the area of ​​the adhesive sheet is 5 times or more and 10 times or less than the area of ​​the magnet.

[0033] (4) The magnetic therapy device according to any one of (1) to (3), wherein the support sheet contains a urethane nonwoven fabric, and the adhesive layer contains an acrylic adhesive.

[0034] (5) An adhesive sheet used for attaching a magnet to human skin, the adhesive sheet comprising an elastic support sheet and an adhesive layer provided on one side of the support sheet, the adhesive layer having a holding power greater than 0 minutes and less than or equal to 12.5 minutes. [Explanation of symbols]

[0035] 1. Magnetic therapy device 2. Magnets 2a Bottom 2b Apex 3 Adhesive sheet 31 Support Sheet 32 Adhesive layer 101 Conventional magnetic therapy devices 102 Magnets in conventional magnetic therapy devices 103 Adhesive sheet of conventional magnetic therapy device HD Height direction P Adherent plate S skin W weight WD Width direction

Claims

1. A magnetic therapy device that is attached to the skin of the human body, The magnetic therapy device includes a magnet and an adhesive sheet attached to the magnet, The pressure-sensitive adhesive sheet comprises a support sheet having elasticity and a pressure-sensitive adhesive layer provided on one surface of the support sheet, The holding power of the pressure-sensitive adhesive layer is greater than 0 minutes and less than 12.5 minutes. Magnetic therapy device.

2. The adhesive strength of the pressure-sensitive adhesive layer is 2.5 N / 24 mm or more and 3.5 N / 24 mm or less.

2. The magnetic therapy device according to claim 1.

3. The area of ​​the adhesive sheet is 5 times or more and 10 times or less than the area of ​​the magnet.

3. A magnetic therapy device according to claim 1 or 2.

4. The support sheet contains a urethane nonwoven fabric, and the pressure-sensitive adhesive layer contains an acrylic pressure-sensitive adhesive.

3. A magnetic therapy device according to claim 1 or 2.

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