Heat generating body

Abstract

The present application provides a heating body, which can reduce peeling even if worn near the movable part of the human body. The heating body (10) includes: a main body part (1) formed with a receiving part (18) by joining the outer peripheral part of the front side sheet part (11) and the back side sheet part (12); a pair of adhering parts (2) respectively extending from the end edges of the two sides of the main body part 1 in the horizontal direction, and provided with an adhesive layer (3) on one side; and a heating material (4) received in the receiving part (18). In the end edges of the two sides of the main body part (1) in the horizontal direction, the area on one side of the central line (C1) passing through the center of the longitudinal direction of the main body part (1) and parallel to the horizontal direction contains the connecting area of the main body part (1) and each adhering part (2), and the area on the other side is all the non-connecting area where the main body part (1) and each adhering part (2) are not connected.

Description

Technical Field

[0001] This invention relates to heating elements. Background Technology

[0002] Patent Document 1 describes a conventional heating element (referred to as a heating device in Patent Document 1). The heating device described in Patent Document 1 is, for example, worn at the back of the neck. The heating device includes: an inner bag formed into a pouch shape by joining a first piece and a second piece; a heating layer disposed within the inner bag; and an adhesive layer disposed on one side of the inner bag. The adhesive layer is formed covering the entire surface of one side of the inner bag and is rectangular in shape when viewed from above. The adhesive layer allows the heating device to be fitted against the user's skin.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-37775 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, as described above, in the heating device described in Patent Document 1, an adhesive layer is provided on the entire surface of the inner pocket. Therefore, when the heating device of Patent Document 1 is worn on the movable part such as the back of the neck, when the user moves their head by tilting their head back, there is a problem that the heating device can easily detach when the head applies force relative to the heating device from above and from the side of the body.

[0008] The present invention was made in view of the above circumstances, and its object is to provide a heating element that can reduce peeling even when worn near the movable part of the human body.

[0009] Technical solutions for solving the problem

[0010] One aspect of the present invention provides a heating element comprising: a main body portion having a receiving portion formed by joining the outer peripheries of a front side plate portion and a back side plate portion; a pair of fitting portions extending from the transverse end edges of the main body portion, each having an adhesive layer disposed on one side; and a heating material housed in the receiving portion. Relative to a centerline passing through the longitudinal center of the main body portion and parallel to the transverse direction, a region on one side includes a connection region between the main body portion and each of the fitting portions, while the region on the other side is entirely a non-connection region where the main body portion and each of the fitting portions are not connected.

[0011] Invention Effects

[0012] The heating element of the present invention has the advantage of reducing peeling even when worn near the movable part of the human body. Attached Figure Description

[0013] Figure 1 This is a schematic perspective view of the heating appliance in use according to this embodiment.

[0014] Figure 2 This is a schematic rear view of the heating appliance as seen from the back.

[0015] Figure 3 yes Figure 2 AA section diagram.

[0016] Figure 4 (A) is a schematic front view of a modified heating appliance. Figure 4 (B) is a schematic front view of another variation of a heating appliance. Figure 4 (C) is a schematic front view of another variation of a heating appliance.

[0017] Figure 5 This is a schematic front view of another variation of a heating appliance. Detailed Implementation

[0018] <Implementation Method>

[0019] Hereinafter, the heating element 10 of this embodiment will be described in detail with reference to the accompanying drawings.

[0020] like Figure 1 As shown, the heating element 10 is a heating element 10 worn on a movable part of the user's neck (back of the neck). The heating element 10 of this embodiment includes a main body 1 having a heating area, and a pair of fitting portions 2 extending laterally from both side edges of the main body 1. Figure 2 As shown, on both sides of the transverse end edge of the main body 1, at least relative to the center line C1 that passes through the longitudinal center of the main body 1 and is parallel to the transverse direction, one side of the area includes the connection area between the main body 1 and each of the fitting parts 2, and the other side of the area is entirely a non-connection area where the main body 1 and each of the fitting parts 2 are not connected.

[0021] Therefore, the heating element 10 in this embodiment is, for example, as follows: Figure 1 As shown, when the main body 1 is worn on the back of the neck with one side below and the other side above, it is not easy to peel off even when the user moves their head and pushes the main body 1 outward. That is, when an external force is applied to the main body 1 from above and from the human body side, the portion of the main body 1 above the center line C1 bends away from the human body, but since the fitting part 2 is only connected at the position below the center line C1, the movement of the main body 1 is not easily transmitted to the fitting part 2, and the fitting part 2 is not easy to peel off. Therefore, the heating element 10 according to this embodiment can reduce the possibility of peeling even when worn near the movable part.

[0022] In the heating element 10 of this embodiment, the movable part that is the user's target area for wearing the device includes, for example, the knee, the back of the knee, the elbow, the shoulder, and the scapula, in addition to the back of the neck. In this embodiment, the user's back of the neck is used as an example of the movable part that is the target area for wearing the device.

[0023] like Figure 2 As shown, the heating element 10 of this embodiment includes: a main body 1 having a housing portion 18; a pair of bonding portions 2 having an adhesive layer 3; and a heating material 4 filled in the housing portion 18. Figure 3 The heating element 10 is flexible. The heating element 10 in this embodiment is a disposable heat pack, but it can also be a reusable heat pack.

[0024] In the following explanation, for ease of explanation, such as Figure 2 As shown, the long side direction of the main body 1 is defined as "lateral," and the short side direction of the main body 1 is defined as "vertical." The lateral and vertical directions are orthogonal. One side of the vertical direction is defined as "bottom side," and the other side is defined as "top side." Furthermore, the direction orthogonal to both the vertical and lateral directions is defined as the "thickness direction." Additionally, in the heating element 10, the side facing the user's skin is designated as the "back side," and the side opposite it is designated as the "front side." However, these directional definitions are for illustrative purposes only and are not intended to determine the usage of the heating element 10.

[0025] Furthermore, in this specification, "parallel" includes not only the case where two lines, surfaces, etc. (hereinafter referred to as lines, etc.) do not intersect when extended, but also the case where two lines, etc., intersect within an angle of 10° or less. Additionally, "orthogonal" refers to the case where two lines, etc., intersect within a range of 90° ± 10°. However, the case where two lines, etc., do not intersect directly but intersect when extended, is also included in "orthogonal".

[0026] Furthermore, the term "central longitudinal point of the main body" as used in this specification refers to the point at the center of a line segment of the main body that is parallel to the horizontal direction and extends from a point on the farthest longitudinal side (lower side) to another point on the farthest longitudinal side (upper side) parallel to the horizontal direction. Similarly, the term "central transverse point of the main body" refers to the point at the center of a line segment of the main body that is parallel to the vertical direction and extends from a point on the farthest transverse side (e.g., left side) to another point on the farthest transverse side (e.g., right side). The terms "first side" and "second side" of the main body refer to sides that are opposite to each other in the horizontal direction.

[0027] (Main Body 1)

[0028] The main body 1 is the portion of the heating element 10 whose heating area is surrounded by the joining portion 13. The main body 1 is formed by overlapping the front side plate portion 11 and the back side plate portion 12 and joining the outer periphery by the joining portion 13. Between the front side plate portion 11 and the back side plate portion 12, the portion surrounded by the joining portion 13 is a storage portion 18 formed in the shape of a bag for storing the heating material 4.

[0029] The outer periphery of the main body 1 is composed of a lower edge 14 extending laterally, a pair of side edge portions 15 and a pair of arc portions 16.

[0030] The lower edge 14 includes: a pair of straight portions 141 parallel to the transverse direction and separated from each other; a pair of recessed portions 142 connected to the straight portions 141 on the inner side and recessed upward; and a generally V-shaped protrusion 143 formed between the pair of recessed portions 142. The recessed portions 142 are curved and smoothly connected to the straight portions 141 and the protrusion 143. The front end of the protrusion 143 is located at the center of the transverse direction of the main body 1 and protrudes downward relative to the recessed portions 142.

[0031] The side edge portion 15 extends longitudinally. The side edge portion 15 is connected to the fitting portion 2 at least in a portion. In this embodiment, since a portion of the side edge portion 15 is integrally formed relative to the fitting portion 2, the connection portion with the fitting portion 2 becomes a virtual boundary line.

[0032] The arc portion 16 connects the side edge portion 15 to the upper end of the transverse center of the main body portion 1. The arc portion 16 is a curve having an arc in at least a portion. The curve of the arc portion 16 does not need to have the same curvature from one end to the other. Sometimes the uppermost point in the arc portion 16 is called "vertex P1". The arc portion 16 narrows between a pair of vertices P1, forming a roughly V-shape. Sometimes this narrowed V-shaped portion is called the tapered portion 17. In this embodiment, the tapered portion 17 is disposed in the transverse center of the main body portion 1. Sometimes the front end of the tapered portion 17 is called "valley point P2".

[0033] Here, the lateral end edge of the main body 1 refers to an edge having a component parallel to the longitudinal direction along the direction of the end edge. In this embodiment, the lateral end edge in the outer periphery of the main body 1 is formed by the range from the end connected to the side edge 15 to the vertex P1 in the side edge portion 15 and the arc portion 16.

[0034] The joining portion 13 is formed by joining the front side panel 11 and the back side panel 12. In this embodiment, the joining portion 13 is formed by welding (heat sealing). However, the joining portion 13 is not limited to welding; for example, it can also be formed by bonding, sewing, pressing, etc.

[0035] The joint 13 includes an outer peripheral joint 131 and an intermediate joint 132. The outer peripheral joint 131 is formed along the outer periphery of the front side plate 11 and the outer periphery of the back side plate 12. The outer peripheral joint 131 has a substantially uniform width along its entire length. The intermediate joint 132 is disposed inside the outer peripheral joint 131. Thus, the intermediate joint 132 divides the area inside the outer peripheral joint 131 into multiple areas. In this embodiment, the intermediate joint 132 extends longitudinally along the center of the transverse direction of the main body 1. However, multiple intermediate joints 132 may be provided, for example, they may be formed at certain intervals in the transverse direction.

[0036] In this embodiment, the storage portion 18 is surrounded by the outer peripheral joint portion 131 and the intermediate joint portion 132. The main body portion 1 has multiple storage portions 18, but it may also have only one storage portion 18. That is, the intermediate joint portion 132 may not be present.

[0037] (Adhesive part 2)

[0038] The fitting part 2 is the portion of the heating element 10 that adheres to the user. An adhesive layer 3 is provided on one side (back side) of the fitting part 2. Figure 2 (The adhesive layer 3 is indicated by a dot). The bonding portion 2 extends laterally outward from the side edge 15 of the main body portion 1. The bonding portion 2 includes a bonding portion body 21 that protrudes laterally from the side edge 15, and an extension portion 22 that protrudes from the bonding portion body 21. The extension portion 22 is not connected to the main body portion 1. In this specification, "not connected" is sometimes referred to as "non-connected".

[0039] The fitting part body 21 is connected only in the region below the center line C1 (on the longitudinal side) of the transverse end edge of the main body 1. In this embodiment, the fitting part body 21 is connected within a certain range including the lower end of the side edge portion 15. That is, the entire region at least above the center line C1 (on the other longitudinal side) of the transverse end edge of the main body 1 is a non-connected region. The non-connected region is the region where the fitting part 2 is not connected to the transverse end edge of the main body 1, for example, via a gap (for example, see reference). Figure 5 The non-connected area is separated from the fitting portion 2 by the triangular notch 5, the notch portion, etc. In this embodiment, the non-connected area is separated from the fitting portion 2 by the triangular notch 5. Furthermore, the non-connected area may also be included in the area lower than the center line C1.

[0040] Through the notch 5, the adhesive portion 2 forms an edge 25 opposite to the non-connected area. The angle α between the edge 25 of the adhesive portion 2 opposite to the non-connected area and the longitudinal direction is preferably 0° or more and 50° or less, more preferably 15° or more and 45° or less. With this configuration, deflection and other effects caused by forces from the movable part can be reduced, making the adhesive portion 2 less prone to peeling.

[0041] Here, the "center line C1" as used in this specification refers to a virtual straight line that passes through the longitudinal center of the main body 1 and is parallel to the transverse direction. In this embodiment, the center line C1 is a straight line that passes through the center point between the uppermost point (vertex P1) and the lowermost point (the point on the lower edge 14 or the front end of the protrusion 143) of the main body 1 in the longitudinal direction.

[0042] In this embodiment, a portion of the upper side of the side edge 15 of the main body 1 is a non-connecting area, while the remaining portion is a connecting area with the main body 21 of the fitting part. The maximum distance from the lower edge 14 of the main body 1 to the upper end of the connecting area relative to the longitudinal direction of the main body 1 is preferably 50% or less, more preferably 45% or less, and even more preferably 40% or less. On the other hand, the lower limit of the distance from the lower edge 14 of the main body 1 to the upper end of the connecting area relative to the maximum longitudinal direction of the main body 1 is preferably 25% or more, more preferably 30% or less, and even more preferably 35% or less. By setting the maximum distance from the lower edge 14 of the main body 1 to the upper end of the connecting area relative to the longitudinal direction of the main body 1 to 25% or more and 50% or less, movement of the main body 1 is less likely to be transmitted to the fitting part 2, and the fitting part 2 is less likely to break off from the main body 1.

[0043] The "maximum longitudinal distance of the main body 1" mentioned here refers to the minimum distance from the virtual straight line passing through the point on the farthest side (lower side) in the longitudinal direction and parallel to the horizontal direction to the virtual straight line passing through the point on the farthest other side (upper side) in the longitudinal direction and parallel to the horizontal direction.

[0044] The lateral length of each fitting part body 21 is preferably 0.8 times or more, more preferably 1.0 times or more, relative to the longitudinal length of the connecting area. On the other hand, the lateral length of each fitting part body 21 is preferably 2 times or less, more preferably 1.8 times or less, and even more preferably 1.5 times or less, relative to the longitudinal length of the connecting area.

[0045] The extension portion 22 protrudes from the bonding portion body 21, expanding the bonding area of ​​the bonding portion body 21. In this embodiment, the extension portion 22 protrudes upward from the bonding portion body 21. The area of ​​the extension portion 22 can be either smaller or larger than the bonding portion body 21.

[0046] The upper end of the extension portion 22 (the upper end 24 of the adhesive portion) is preferably located above the center line C1. This allows for an expansion of the adhesive area without causing the adhesive portion 2 to expand laterally. However, the upper end of the extension portion 22 (the upper end 24 of the adhesive portion) is preferably located below the uppermost point (apex P1) of the main body portion 1. This reduces the likelihood of the adhesive portion 2 adhering to the user's hair while expanding the adhesive area. In this embodiment, the upper end of the extension portion 22 (the upper end 24 of the adhesive portion) is located between the apex P1 and the center line C1 of the main body portion 1 in the longitudinal direction.

[0047] The fitting portion 2 is preferably formed by overlapping the front side piece 11 and the back side piece 12. Preferably, the front side piece 11 and the back side piece 12 constituting the fitting portion 2 are partially joined. Specifically, in the fitting portion 2, the front side piece 11 and the back side piece 12 are joined at a point-like joint 23 formed at a rounded corner portion consisting of a lower edge and a side edge. With this configuration, compared to a fitting portion 2 where the front side piece 11 and the back side piece 12 are joined over the entire surface, it is more flexible and easily deformable, thus reducing pain when the user moves their head while wearing it and improving its fit to the skin.

[0048] The area of ​​the adhesive layer 3 in the bonding portion 2 is preferably 15% or more, more preferably 20% or more, and even more preferably 25% or more, relative to the area of ​​the main body portion 1. On the other hand, the area of ​​the adhesive layer 3 in the bonding portion 2 is preferably 65% ​​or less, more preferably 60% or less, and even more preferably 55% or less, relative to the area of ​​the main body portion 1. By making the area of ​​the adhesive layer 3 in the bonding portion 2 2 25% or more relative to the area of ​​the main body portion 1, the adhesion to the user can be maintained at a higher level. By making the area of ​​the adhesive layer 3 in the bonding portion 2 30% or less relative to the area of ​​the main body portion 1, the adhesion to hair can be reduced, and the burden on the skin can be lessened. The area of ​​the adhesive layer 3 in the bonding portion 2 referred to here refers to the total area of ​​the adhesive layers 3 located on the plurality of bonding portions 2.

[0049] The adhesive layer 3 is provided at least in the contact portion 2, but it may also be provided in the main body portion 1 in addition to the contact portion 2. In this embodiment, the adhesive layer 3 is provided in the middle joint portion 132 and a portion of the outer peripheral joint portion 131, in addition to the contact portion 2. However, the adhesive layer 3 is preferably located away from the portion corresponding to the storage portion 18. This reduces the likelihood of the adhesive layer 3 weakening its adhesion to the skin, even if the portion corresponding to the storage portion 18 becomes hot and the user sweats in that portion. The area of ​​the adhesive layer 3 provided in the main body portion 1 is preferably 20% or less, more preferably 15% or less, relative to the area of ​​the main body portion 1. This reduces discomfort when the heating element 10 is worn near the movable portion. Furthermore, if the area of ​​the adhesive layer 3 provided in the main body portion 1 is too large, the heating element 10 becomes too tightly fitted to the user, increasing discomfort when worn in the movable portion.

[0050] In this embodiment, the adhesive layer 3 is continuously present all over one side of the bonding portion 2, but it may also be present as stripes or dots (polka dots) spaced at certain intervals.

[0051] There are no particular limitations on the adhesive layer 3. Examples of adhesives that can be used include acrylic adhesives, vinyl adhesives, vinyl acetate adhesives, polyvinyl acetal adhesives, vinyl chloride adhesives, cellulose adhesives, chloroprene adhesives, nitrile rubber adhesives, styrene rubber adhesives, silicone rubber adhesives, polysulfide rubber adhesives, terpene resins, or water-soluble rosin. From the viewpoint of ensuring an appropriate strength of adhesive force that is neither too strong nor too weak, styrene rubber adhesives are preferred.

[0052] The front side panel 11 and the back side panel 12, which constitute the main body 1 and the bonding part 2, are preferably made of resin film. Thermoplastic resin is preferred as the resin used for the resin film. Examples of thermoplastic resins include polyethylene, polypropylene, polyester, polyamide, polyurethane, polystyrene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polycarbonate, and ethylene-vinyl acetate copolymer. These resins can be used alone or in combination of two or more.

[0053] Furthermore, from the viewpoints of providing a pleasant skin feel, absorbing sweat, and improving the anchoring of the adhesive, the back side panel 12 is preferably provided with a woven or non-woven fabric on the outer side of the resin film. Examples of woven or non-woven fabric fiber materials include natural fibers such as cotton, linen, silk, and paper; semi-synthetic fibers such as rayon and acetate; synthetic fibers such as nylon, vinylon, polyester, acrylic, polyethylene, polypropylene, polyvinyl chloride, and polybutylene terephthalate; and blends of these fibers. Among these fiber materials, nylon, polyester, and polypropylene are preferred from the viewpoint of providing a pleasant skin feel. These fiber materials can be used alone or in combination of two or more. The basis weight of the woven or non-woven fabric is not particularly limited as long as it prevents the heat-generating material 4 from leaking out of the main body 1; for example, 20 g / m² is an example. 2 Above and 70g / m 2 the following.

[0054] However, the main body 1 and the bonding part 2 may not be a laminate of resin film and woven or nonwoven fabric, but may be composed of a single resin film or a single woven or nonwoven fabric.

[0055] In addition, the main body 1 is breathable. By making the resin membrane a porous membrane or forming a resin membrane with multiple vent holes, the main body 1 has multiple vent holes, allowing air to pass through.

[0056] (Heating material 4)

[0057] like Figure 3 As shown, the heating material 4 is a material that can generate heat and is housed in the storage section 18. In this embodiment, the heating material 4 generates heat through an oxidation reaction upon contact with air. The heating material 4 is a powdered material.

[0058] The heating material 4 may include, for example, an oxidizable metal, activated carbon, carbon black, a water-retaining agent, a metal salt (e.g., table salt), and water. The oxidizable metal is a metal that generates heat of oxidation, and examples include powders or fibers of one or more of iron, aluminum, zinc, manganese, magnesium, and calcium. Iron powder is preferred from the viewpoints of operability, safety, manufacturing cost, storage, and stability. Examples of iron powder include one or more of reduced iron powder and atomized iron powder. Examples of water-retaining agents include wood flour, vermiculite, diatomaceous earth, perlite, silica gel, alumina, and absorbent resin. The heating material 4 may directly use powdered compositions used in existing disposable heat packs; there are no particular limitations in this invention.

[0059] As the heating material 4, materials other than those that generate heat through contact with air can also be used. For example, materials that generate heat by being irradiated by microwaves in a microwave oven or the like (such as ceramic powders such as ferrite, red beans, etc.) or medicinal liquids that generate heat by coagulation heat can also be used.

[0060] (Usage example)

[0061] like Figure 1 As shown, the heating element 10 configured in this way is positioned with the user's movable part (head) above the main body 1, and is worn by attaching the fitting part 2 to the skin. In this state, if the user moves their head, an external force is applied to the main body 1 from above and to the human body. As a result, the portion of the main body 1 above the center line C1 flexes away from the human body, but since the fitting part 2 is only connected at a position below the center line C1, the movement of the main body 1 is not easily transmitted to the fitting part 2, and the fitting part 2 is not easily peeled off. Therefore, the heating element 10 according to this embodiment can reduce the possibility of peeling off even when worn near the user's movable part.

[0062] When the heating element 10 is worn and is not easily detached from the back of the neck, it can effectively heat the back of the neck. As a result, stiffness in the shoulders and neck is relieved, and pain is alleviated in case of pain.

[0063] <Variation Example>

[0064] The above-described embodiments are merely one of the various embodiments of the present invention. Various modifications can be made to the embodiments, depending on the design, etc., as long as the objectives of the present invention are achieved. Hereinafter, variations of the embodiments are listed. The variations described below can be appropriately combined and applied.

[0065] In the above embodiment, the upper end 24 of the fitting portion 2 is located lower than the upper vertex P1 of the main body portion 1, but as Figure 4 As shown in (A), the upper end 24 of the fitting portion 2 can also be located above the upper vertex P1 of the main body portion 1. In this case, for example, if the heating element 10 is worn near a movable part without hair, there will be no problem of hair sticking to the fitting portion 2, the lateral dimension can be shortened as much as possible, and the bonding area can be expanded.

[0066] In the above embodiment, the fitting portion 2 has an extension portion 22, but as Figure 4As shown in (B), the extension portion 22 may not be present. By omitting the extension portion 22, the adhesive area is reduced, and the adhesive portion 2 is easier to peel off compared to the embodiment. However, according to the heating element 10 of this modification, it is possible to form a heating element 10 that can be properly worn as long as the movable part has minimal movement, thus reducing the burden on the skin and making it less prone to peeling off. Furthermore, in this modification, the upper end 24 of the adhesive portion 2 is located below the upper vertex P1 of the main body portion 1.

[0067] In the above embodiment, the extension portion 22 protrudes upward from the fitting portion body 21, but as Figure 4 As shown in (C), the extension 22 can also protrude laterally. In this modified example, the upper end 24 of the fitting part 2 is located lower than the upper vertex P1 of the main body part 1. In this case, when worn near the back of the neck, which is a movable part, the fitting part 2 can be positioned as far away from hair as possible, and the bonding area can be maximized.

[0068] In the above embodiment, the non-connected area and the fitting portion 2 are separated by the notch portion 5, but as Figure 5 As shown, the non-connected area and the fitting part 2 can also be separated by the gap 6. Figure 5 In the modified example shown, a generally triangular piece surrounded by the gap 6 and the side edge 15 is connected to the region R1 on the upper side of the side edge 15. However, the region R1 and the bonding part 2 are separated due to the gap 6. Therefore, the region R1 is considered as a non-connected region. In addition, no adhesive layer 3 is provided on the triangular piece.

[0069] The bonding portion 2 forms an edge 25 opposite to the non-connected area through a gap 6. The angle formed by the gap 6 with respect to the longitudinal direction (i.e., the angle α formed by the edge 25 opposite to the non-connected area in the bonding portion 2) is preferably 0° or more and 50° or less, more preferably 15° or more and 45° or less. With this configuration, a bonding portion 2 that is less prone to peeling can be formed.

[0070] In the above embodiments or variations, the non-connected area and the fitting part 2 are separated by the gap 6 or the notch 5, but the non-connected area and the fitting part 2 can also be separated by a combination of the notch 5 and the gap 6.

[0071] In the above embodiment, the bonding part 2 is a structure in which the front side piece 11 and the back side piece 12 are overlapped. However, the bonding part 2 may not be two layers, or it may be composed of only either the front side piece 11 or the back side piece 12.

[0072] In the above embodiment, the long side of the main body 1 is defined as the horizontal direction, and the short side is defined as the vertical direction. However, the vertical and horizontal directions of the main body 1 can also be the same length. In addition, the main body 1 can also be, for example, a rectangle, a square, an ellipse, a circle, or the like.

[0073] In the above embodiments, one side is designated as the "lower side" and the other side as the "upper side" in the vertical direction, but it is also possible to designate one side as the "first side" and the other side as the "second side".

[0074] In the above embodiment, the example described is that the adhesive part 2 is directly attached to the user's skin, but the adhesive part 2 can also be attached to the user's clothing.

[0075] <Effects>

[0076] As explained above, the heating element 10 of the first embodiment includes: a main body 1, which forms a receiving portion 18 by joining the outer periphery of the front side plate portion 11 and the back side plate portion 12; a pair of bonding portions 2, which extend from the transverse end edges of the main body 1 on both sides respectively, and have an adhesive layer 3 provided on one side; and heating material 4 housed in the receiving portion 18. On the transverse end edges of the main body 1, relative to the center line C1 passing through the longitudinal center of the main body 1 and parallel to the transverse direction, one side contains a connection area between the main body 1 and each bonding portion 2, while the other side is entirely a non-connection area where the main body 1 and each bonding portion 2 are not connected.

[0077] According to this method, the heating element 10 is arranged such that the movable part is located on the opposite side of the main body 1. When the adhesive part 2 is attached to the user, even if force is applied to the main body 1 from the movable part, since the adhesive part 2 is only connected to a position closer to the center line C1, the movement of the main body 1 is not easily transmitted to the adhesive part 2, and the adhesive part 2 is not easily peeled off. Therefore, according to the heating element 10, even when worn near the movable part, peeling can be reduced.

[0078] In the second embodiment, the heating element 10 is separate from the non-connected area and the adhesive portion 2 by a gap 6, as in the first embodiment. According to this embodiment, the adhesive portion 2 can be made less prone to peeling off with a simple structure.

[0079] In the third method, the heating element 10 is separated from the non-connected area and the adhesive portion 2 by a triangular notch 5, as in the first or second method. According to this method, areas other than the adhesive portion 2 can be cut off, thus reducing the risk of skin damage caused by contact between these areas and the user's skin.

[0080] In the fourth embodiment, the heating element 10 is in the second or third embodiment, where the angle α formed by the edge 25 of the adhesive portion 2 opposite to the non-connected area with respect to the longitudinal direction is 15° or more and 45° or less. According to this embodiment, the adhesive portion 2 can be formed to be less prone to peeling.

[0081] In the fifth embodiment, the heating element 10 is located in any of the first to fourth embodiments, with the end of the fitting portion 2 on the other side of its longitudinal direction positioned further away than the end of the main body portion 1 on the other side of its longitudinal direction. According to this embodiment, for example, when the heating element 10 is worn near the head, which is a movable part of the user and contains hair, the adhesion of the fitting portion 2 to the user's hair can be reduced.

[0082] In the sixth embodiment, the heating element 10 is one of the first to fifth embodiments in which, in the longitudinal direction, the end of the other side of the longitudinal direction of the fitting portion 2 is located between the end of the other side of the longitudinal direction of the main body portion 1 and the center line C1. According to this embodiment, for example, when the heating element 10 is worn near the head where hair exists and which is a movable part of the user, a larger bonding area to the user can be ensured, and the adhesion of the fitting portion 2 to the user's hair can be reduced.

[0083] In the seventh method, the heating element 10 is one in which the area (total area) of the adhesive layer 3 in the pair of mating parts 2 is 15% or more of the area of ​​the main body part 1. According to this method, appropriate adhesion to the user can be ensured.

[0084] The heating element 10 in the eighth embodiment is one of the first to seventh embodiments, wherein the fitting portion 2 has a portion of a front side plate portion 11 and a portion of a back side plate portion 12, and the portion of the front side plate portion 11 and the portion of the back side plate portion 12 are partially joined. According to this embodiment, compared with the fitting portion 2 where the front side plate portion 11 and the back side plate portion 12 are joined all over the surface, the fitting portion 2 is more easily deformable, and for example, when fitting to the user's skin, it can improve the tightness to the user's skin.

[0085] Explanation of reference numerals in the attached figures

[0086] 10 heating elements

[0087] 1 Main body

[0088] 11 Front Side Panel

[0089] 12 Back side panels

[0090] 13 Joints

[0091] 15 Lateral edge

[0092] 18 Storage Department

[0093] 2. Adhesion Part

[0094] 24. The upper end of the mating part (the other end of the mating part in the longitudinal direction).

[0095] 25. Edges opposite to non-connected regions

[0096] 3 adhesive layers

[0097] 4 Heating materials

[0098] 5 Notch

[0099] 6 gaps

[0100] C1 centerline

[0101] α is the angle between the edge of the non-connected region and the longitudinal direction.

Claims

1. A heating element, characterized in that, include: The main body has a storage section formed by joining the outer periphery of the front side panel and the back side panel; A pair of mating portions, extending from the transverse end edges of the main body, each having an adhesive layer on one side; and The heating material stored in the storage section In the transverse two-sided end edges of the main body, the area on one side relative to the center line passing through the longitudinal center of the main body and parallel to the transverse direction includes the connection area between the main body and each of the fitting parts, while the area on the other side is entirely a non-connection area where the main body and each of the fitting parts are not connected.

2. The heating element according to claim 1, characterized in that: The non-connected area is separated from the adhesive portion by a gap.

3. The heating element according to claim 1, characterized in that: The non-connected area is separated from the fitting part by a triangular notch.

4. The heating element according to claim 2 or 3, characterized in that: The angle between the edge of the fitting portion opposite to the non-connected area and the longitudinal direction is 15° or more and 45° or less.

5. The heating element according to any one of claims 1 to 3, characterized in that: The longitudinal end of the fitting portion on the other side is located on one side closer than the longitudinal end of the main body portion on the other side.

6. The heating element according to claim 5, characterized in that: In the longitudinal direction, the end of the other side of the longitudinal direction of the fitting portion is located between the end of the other side of the longitudinal direction of the main body portion and the center line.

7. The heating element according to any one of claims 1 to 3, characterized in that: The area of ​​the adhesive layer in the pair of mating portions is more than 15% of the area of ​​the main body portion.

8. The heating element according to any one of claims 1 to 3, characterized in that: The bonding portion has a portion of the front side panel and a portion of the back side panel. A portion of the front side panel and a portion of the back side panel are partially joined.

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