TWI865655B - Eye mask type heating element - Google Patents

Abstract

The present invention provides an eye mask-type heating element that can fit the face well. The heating element has: a heating material; a main body that contains the heating material and covers the left and right eyes and the surroundings of each eye of the user's face when worn; and a pair of ear hooks that are hung on the user's ears when worn. One of the pair of ear hooks is arranged at the end of the left side of the main body, and the other is arranged at the end of the right side of the main body. Each of the pair of ear hooks has a portion including a joint that is joined to the end of the corresponding main body. The outline of each joint of the pair of ear hooks is at the middle and inner side of the main body in the horizontal direction, and reaches the lower edge of the main body after bending inward halfway, so a portion of each joint protrudes inward.

Description

Eye mask type heating element

The present invention relates to an eye mask type heating element that is worn on the user's face.

So far, there is a known eye mask type heating element that can be worn on the user's face to provide warmth to the left and right eyes and the areas around the eyes. When worn, the heating element has ear hooks on the left and right ends of the main body that covers the left and right eyes and the areas around the eyes. The heating element can be worn on the face by hanging the ear hooks on the ears on the corresponding sides of the left and right ears. Generally speaking, the ear hooks are connected to the inner ends (the sides of the main body) of the left and right ends of the main body while extending parallel to the horizontal direction of the main body. However, as shown in Patent Document 1, there is also a form in which the ear hooks extend obliquely downward relative to the horizontal direction of the main body, and the inner ends of the ear hooks are connected to the left and right ends of the main body.

Prior art literature

Patent Literature

Patent document 1: Japanese Patent No. 5377611

Summary of invention

In the conventional heating device, the ear hooks are hung on the left and right ears, and the main body is bent with the center of the horizontal direction as the boundary to cover the user's face, so that the main body can fit the face to a certain extent. However, because the cheekbones protrude near the lower part of the face below the eyes, the left and right corners of the lower side of the main body covering the face near that part cannot fit the face and float up, and the heat generated by the self-heating material escapes to the outside, etc., and the user's eyes cannot be effectively warmed. In the heating device of patent document 1, each ear hook is tilted downward relative to the horizontal direction of the main body, so that the main body is easy to fit the face when worn, but there is still room for improvement in patent document 1 for the above-mentioned problem.

This invention is developed to solve the above-mentioned problems, and its purpose is to provide an eye mask-type heating element that can fit the face well.

The present invention relates to an eye mask type heating element worn on the user's face. The heating element of the present invention is characterized in that it has: a heating material; a main body, which contains the heating material and covers the left and right eyes and the periphery of each eye when worn; and a pair of ear hanging parts, which are hung on the ears when worn; one of the pair of ear hanging parts is arranged at the end of the left side of the main body, and the other is arranged at the end of the right side of the main body, and each of the pair of ear hanging parts has a part including a joint part connected to the end of the corresponding main body, and each joint part of the pair of ear hanging parts is at the outline of the horizontal middle inner side of the main body, and reaches the lower edge of the main body after bending inward in the middle, so a part of each joint part protrudes inward.

In the heating element of the present invention, the inwardly curved portion of each joint of the pair of ear hooks that can constitute the inner contour line is composed of the following first and second portions: the first portion is a portion extending from the inwardly curved portion parallel to the transverse direction of the main body; the second portion is a portion connected to the first portion and extending in a longitudinal direction orthogonal to the transverse direction of the main body to the lower edge of the main body.

In the heating element of the present invention, the aforementioned inner side contour line in each joint portion of the aforementioned pair of ear hooks may be formed, except for the portion extending from the lower edge of the aforementioned main body portion to the longitudinal direction orthogonal to the transverse direction of the aforementioned main body portion, and the aforementioned inner side contour line inwardly curved portion intersects with an imaginary line parallel to the transverse direction of the aforementioned main body portion.

For example, each joint of the aforementioned pair of ear hooks may be configured such that the aforementioned inner contour line bends concavely or convexly inwardly in the middle.

Alternatively, each joint of the pair of ear hooks may be configured such that the inner side contour line is bent inwardly in the middle to be inclined downward horizontally relative to the main body.

Alternatively, each joint of the aforementioned pair of ear hooks may be configured such that the aforementioned inner contour line is bent inwards in the middle to form a step shape with a plurality of height differences.

In the heating element of the present invention, the portion protruding inward in each joint of the aforementioned pair of ear hooks may include at least one partitioning portion spaced apart in the horizontal direction of the aforementioned main body.

In the heating element of the present invention, each joint portion of the aforementioned pair of ear hooks can be configured to bend inwardly at the aforementioned inner side contour line midway to reach the upper edge of the aforementioned main body, so that the other portion protrudes inwardly.

In the heating element of the present invention, each joint of the pair of ear hooks can be configured so that the outline of the horizontal middle and outer sides of the main body overlaps with the left and right side edges of the main body.

In the heating element of the present invention, the pair of ear hooks can be configured to be self-superimposed on the main body and unfolded by folding back each joint.

In the heating element of the present invention, the inner contour line of the joint between the pair of ear hooks and the main body is bent inwards midway to reach the lower edge of the main body. Therefore, according to the heating element of the present invention, when the pair of ear hooks are stretched laterally outwards relative to the main body in order to hang the pair of ear hooks on the user's ears, the areas on the lower sides of the left and right ends of the main body are strongly stretched and deformed to bend toward the user's face side in the longitudinal bending of the main body, so that the areas on the lower sides of the left and right ends of the main body can be attached to the face without floating from the face. In particular, the area on the lower sides of the left and right ends of the main body covers the cheekbones under the eyes. Even if the cheekbones are protruding, they can still bend along the surface shape to cover the cheekbones, so that the main body can fit closely to the user's face.

1: Warm parts

2: Main body

3: Heating material

4L, 4R: Ear hooks

5: Joint

20: The upper edge of the main body, the upper edge

21: The lower edge of the main body

22: Left edge of the body

23: Right edge of the body

24: Longitudinal center line

25: Left corner of the lower side of the main body

26: Right corner of the lower side of the main body

27A, 27B: Sheet

28: 1st joint

29L, 29R: Second joint

30: The third joint

40: Open mouth

50: Outer contour of the joint

51: Inner contour of the joint

51A,51E:Part 1

51B,51F:Part 2

51C,51G:Part 3

51D, 51H: Inward bend

52: protruding part, divergent part

53: Bending part

54: Divider

55: Angle

56:

57: Imaginary line

58: Protruding part

X1-X1: line

Figure 1(A) is a front view of the heating element of this embodiment, and Figure 1(B) is a rear view of the heating element of this embodiment.

Figure 2 is a three-dimensional diagram of the heating element of this embodiment.

Figure 3 is a rear view of the heating element of this embodiment with a pair of ear hooks unfolded.

Figure 4 is a cross-sectional view taken along line X1-X1 of Figure 3.

Figure 5 is a rear view of the main body.

Figure 6 is a rear view of the main body when a pair of ear hooks are stretched toward the transverse outer side of the main body in the heating element of this embodiment.

Figure 7 (A) and Figure 7 (B) are both rear views showing important parts of the main body of the heating element in the modified example.

Figure 8 (A) and Figure 8 (B) are both rear views showing important parts of the main body of the heating element in the modified example.

Figure 9 (A), Figure 9 (B), and Figure 9 (C) are all rear views showing important parts of the main body of the heating element in the modified example.

Figure 10(A), Figure 10(B), and Figure 10(C) are all rear views showing important parts of the main body of the heating element in the modified example.

Figure 11 (A) and Figure 11 (B) are both rear views showing important parts of the main body of the heating element in the modified example. .

Figure 12 (A), Figure 12 (B), and Figure 12 (C) are all rear views showing important parts of the main body of the heating element in the modified example.

FIG13(A) is a schematic cross-sectional view showing the relationship between the main body and the ear hook of the heating element of the present embodiment, and FIG13(B) is a schematic cross-sectional view showing the relationship between the main body and the ear hook of the heating element of the modified example.

Figure 14 (A) is a front view of the modified example heating element, and Figure 14 (B) is a rear view of the modified example heating element.

The form used to implement the invention

The following describes the implementation of the eye mask type heating element (hereinafter referred to as "heating element") of the present invention with reference to the drawings. The heating element is worn on the user's face and used to treat eye fatigue or relieve muscle stiffness around the eyes by giving warmth to the left and right eyes and the areas around the eyes, thus providing a relaxing effect. Furthermore, the eye area refers to the area from the upper eyelid to the lower eyelid in the vertical direction of the face, preferably from the eyebrows to the nose, and in the horizontal direction of the face, it refers to the area from the eye head to the eye and the ear.

As shown in Fig. 1 to Fig. 5, the heating element 1 of this embodiment has: a heating material 3, a main body 2 containing the heating material 3, and a pair of ear hanging parts 4L, 4R provided at the left and right ends of the main body 2. The heating element 1 is worn on the face so that the main body 2 covers the left and right eyes and the surroundings of each eye by hanging each ear hanging part 4L, 4R on the ears corresponding to the left and right ears. In addition, the heating element 1 heats the heating material 3 contained in the main body 2, thereby giving warmth to the left and right eyes and the surroundings of each eye in contact with the main body 2. The heating element 1 is the same as a disposable heating pack, for example, and uses the reaction heat generated by the heating material 3 with the oxidation reaction as a heat source. Furthermore, the heating element 1 of the present invention is not limited to using the reaction heat generated by the heat-generating material 3 during the oxidation reaction as a heat source, and can also be, for example, microwave irradiation by a microwave oven to give the heat-generating material 3 thermal energy.

First, the heat generating material 3 can be a powdered material that generates heat by contact with air. The heat generating material 3 can be exemplified by a composition containing the following substances in appropriate amounts, respectively, the aforementioned substances being oxidizable metals, activated carbon, carbon black, water retaining agents (such as wood powder, vermiculite, diatomaceous earth, pulex, silicone, aluminum oxide, water-absorbing resin, etc.), metal salts (such as salt, etc.) and water. The oxidizable metal is a metal that can generate heat of oxidation reaction, and can be exemplified by powders or fibers of one or more of iron, aluminum, zinc, manganese, magnesium, and calcium. Among these, iron powder is also preferred in terms of handling, safety, manufacturing cost, storage and stability. The iron powder can be selected from one or more of reduced iron powder and atomized iron powder. The above composition can use the known composition used in disposable heating packs.

Furthermore, the heat-generating material 3 may also use a material that generates heat without contact with air. For example, a material that generates heat by receiving microwave irradiation from a microwave oven (e.g., ceramic powder such as granulated iron, etc.) may also be used as the heat-generating material 3.

Next, the main body 2 covers the left and right eyes and the surroundings of each eye when the heating element 1 is worn on the face. The main body 2 is flat and formed in a horizontally long shape in a planar view, and is large enough to cover the left and right eyes and the surroundings of each eye. In a planar view, the main body 2 has an upper edge 20 and a lower edge 21 along the horizontal direction, and left and right side edges 22, 23 along the longitudinal direction. From the longitudinal center line 24 extending longitudinally and parallel to the central position in the horizontal direction, it is a left-right symmetrical shape.

Furthermore, in the present disclosure, "transverse" refers to the direction in the main body 2 that is parallel to the left-right direction of the face (the direction connecting the left and right ears) when the heating element 1 is worn on the face, and "longitudinal" refers to the direction orthogonal to the transverse direction, and is the direction in the main body 2 that is parallel to the up-down direction of the face (the direction connecting the forehead, nose, and chin) when the heating element 1 is worn on the face. In this embodiment, the length direction of the main body 2 is the transverse direction. "Inside" refers to the side of the longitudinal center line 24 in the transverse direction of the main body 2, and "outside" refers to the left and right side edges 22 and 23 on the opposite side of the longitudinal center line 24 in the transverse direction of the main body 2. "Left-right direction" is defined based on the user wearing the heating element 1 on the face and facing forward. The definitions of these directions do not limit the usage of the heating element 1.

Compared to the upper edge 20 which is in a straight line or a curved line with concave and convex shapes, the lower edge 21 is located below the eyes when the heating element 1 is worn on the face, so the horizontal central part is in a concave shape along the shape of the nose. In addition, the lower edge 21 extends downwardly from the lower end of the concave part to the left and right ends relative to the horizontal direction, and the left and right corners 25, 26 on the lower side of the main body 2 are greatly expanded on the lower side. Thereby, the left and right corners 25, 26 on the lower side of the main body 2 will cover the vicinity of the cheekbones under the eyes when the heating element 1 is worn on the face. The left and right corners 25, 26 on the lower side of the main body 2 have a curvature in this embodiment, but do not necessarily have a curvature. The left and right side edges 22 and 23 are straight lines in this embodiment, but may also be curved lines that are convexly curved outward.

The main body 2 is formed into a bag shape, and has a storage space inside that can sealably store the heat-generating material 3. The main body 2 has two sheets 27A and 27B with the same shape on the front and back sides, and the parts along the outer periphery of the two sheets 27A and 27B are all joined to form a bag shape. The two sheets 27A and 27B are joined using heat bonding (heat sealing) in this embodiment, but other than heat bonding, well-known methods such as compression bonding using known adhesives, ultrasonic bonding, etc. can also be used, and a combination of these methods can also be used.

The width dimension of the first joint portion 28 joining the outer periphery of the two sheets 27A, 27B is not particularly limited, and can be an appropriate width dimension. In addition, the width dimension of the first joint portion 28 can be slightly the same over the entire outer periphery of the main body 2, or can be different as in the present embodiment. In the present embodiment, the first joint portion 28 is formed such that the width dimension of the longitudinal edge portion along the left and right side edges 22, 23 of the main body 2 is larger than the width dimension of the transverse edge portion along the upper edge 20 and the lower edge 21 of the main body 2. Furthermore, the first joint portion 28 is formed such that the width of the longitudinal edge portion along the left and right side edges 22, 23 of the main body 2 increases toward the upper and lower sides, and the width is formed such that the width is the largest at the left and right corners 25, 26 at the lower side of the main body 2.

In addition to the first joint 28, the main body 2 also has two sheets 27A and 27B joined to a pair of second joints 29L and 29R. A pair of second joints 29L and 29R are arranged in the main body 2, corresponding to the positions of the left and right eyes when the heating element 1 is worn on the face. One of the second joints 29L corresponds to and covers the left eye when the heating element 1 is worn on the face, and the other second joint 29R corresponds to and covers the right eye when the heating element 1 is worn on the face, and each of them becomes an eye covering part in the main body 2.

The pair of second joints 29L, 29R (eye covering part) is a part that does not contain the heat generating material 3 in this embodiment. The pair of second joints 29L, 29R (eye covering part) is separated from the part of the body 2 that covers the periphery of the eye (peripheral covering part), and restricts the heat generating material 3 contained in the adjacent peripheral covering part from moving to the pair of second joints 29L, 29R (eye covering part). The pair of second joints 29L, 29R (eye covering part) presents a horizontally long oval shape (including an ellipse), but as long as it can cover the eyes, its shape is not particularly limited, and it can also present a horizontally long rectangle or rhombus, etc.

Since the heating material 3 is not contained in the pair of second joints 29L, 29R (eye covering part) of the main body 2, it is designed so that when the heating element 1 is worn on the face, the left and right eyes will not be overheated by the high temperature generated by the heating material 3. If the left and right eyes (eyeballs) are overheated with high temperature, there is a concern that the corneal protein will be deteriorated due to the heat. Therefore, in this embodiment, the left and right eyes (eyeballs) are prevented from being overheated when the heating element 1 is worn on the face.

If the filling rate of the heating material 3 in the eye covering part of the main body 2 is lower than that in the surrounding covering part, the heating material 3 can be accommodated, but from the perspective of not overheating the left and right eyes (eyeballs) when the heating element 1 is worn on the face, it is better not to accommodate the heating material 3. Furthermore, the "filling rate" in this disclosure means the ratio of the weight of the heating material 3 actually filled in the eye covering part and the surrounding covering part relative to the maximum weight of the heating material 3 that can be filled.

Furthermore, from the perspective of not overheating the left and right eyes (eyeballs) when the heating element 1 is worn on the face, the eye covering portion of the main body 2, which corresponds to the left and right eyes when the heating element 1 is worn on the face, can also be used as a through hole. However, if the eye covering portion is used as a through hole, when the heating element 1 is used as an eye mask at bedtime, the main body 2 cannot be used to block external light, so the effect of the eye mask is lost. In addition, when the heating element 1 is worn on the face, it cannot provide appropriate warmth to the left and right eyes, and the heat generated by the self-heating material 3 will escape to the outside from the through hole, so there is a concern that it cannot effectively provide warmth around the eyes. Therefore, in the embodiment of the heating element 1, by making the eye covering part of the main body 2 the second joint part 29L, 29R, the eye mask effect can be achieved more effectively compared to the case where the eye covering part is a through hole, and when the heating element 1 is worn on the face, appropriate warmth can be given to the left and right eyes, and the excessive drop in the temperature of the warmth given around the eyes can be suppressed.

The two sheets 27A and 27B constituting the body 2 have the flexibility to follow the shape of the face surface when the heating element 1 is worn on the face. The material of the two sheets 27A and 27B is not particularly limited, but considering the strength or durability against the heat of the heating material 3, it is preferred to use a resin film.

The resin used in the above-mentioned resin film is not particularly limited, but thermoplastic resins are preferred. Examples of thermoplastic resins include polyethylene, polypropylene, polyester, polyamide, polyurethane, polystyrene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polycarbonate, ethylene-ethyl acetate copolymer, polyethylene terephthalate, etc. Among them, preferred examples include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, and polyethylene terephthalate. These resins can be used alone or in combination of two or more.

Furthermore, from the perspective of making the heating element 1 have good skin contact, it is preferred that the two sheets 27A, 27B be composed of a laminate having a breathable woven or non-woven fabric on the side opposite to the side of the resin film heating material 3.

The fiber materials of the above-mentioned woven or non-woven fabrics can be exemplified by 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 acid, polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, and polybutylene terephthalate; and mixed fibers of these fibers. Among them, from the perspective of good skin touch, the fiber materials can be preferably exemplified by nylon, polyester, polypropylene, and polyethylene terephthalate, and more preferably exemplified by nylon, polyester, and polyethylene terephthalate. These fiber materials can be used alone or in combination of two or more. The size of the woven or nonwoven fabric is not particularly limited as long as it is a size that can prevent the heat generating material 3 from leaking out of the main body 2, but is preferably about 20 g/m ² to 90 g/m ² .

Of the two sheets 27A and 27B, the first sheet 27A on the side opposite to the face side when the heating element 1 is worn on the face is breathable. In order to ensure breathability, the resin film constituting the first sheet 27A is made of, for example, a porous resin film or a resin film with a plurality of perforations (not shown) formed by a needle, and the air is connected to the inside and outside of the main body 2 through a plurality of small holes. The plurality of small holes can be formed in the entire area of the resin film or in a part of the area. The size of each small hole is not particularly limited as long as it can suppress the heat-generating material 3 from leaking out of the main body 2 through the small hole. An example thereof is 0.1 μm or more and 30 μm or less. The shape and number of each small hole are not particularly limited. The size, shape, and number of each small hole can be appropriately set after considering the air permeability of the corresponding main body 2 and the heating temperature of the heating material 3 during use.

Furthermore, when the heating element 1 is used for the purpose of warming the left and right eyes and the surrounding areas of each eye, its heating temperature should be set to above 30°C and below 70°C in a 20°C environment, preferably above 35°C and below 60°C (temperature measurement method is based on Japanese industrial standard S4100).

Of the two sheets 27A and 27B, the second sheet 27B facing the face when the heating element 1 is worn on the face may have the same degree of air permeability as the first sheet 27A, or may have lower air permeability with greater resistance to air permeability than the first sheet 27A, or may be non-air permeable so that air cannot pass through it. If the resin film constituting the second sheet 27B is non-air permeable, a non-porous film and a non-air permeable resin film without perforations (not shown) is used.

The thickness of the two sheets 27A and 27B is not particularly limited, but preferably about 0.1 mm or more and 2.0 mm or less. This makes the body 2 soft and easy to fit on the face, and maintains a certain strength in the body 2.

Furthermore, the two sheets 27A and 27B do not necessarily have to be composed of a laminate of a resin film and a woven or non-woven fabric, but may be composed of a single resin film or a single woven or non-woven fabric.

Next, a pair of ear hanging parts 4L, 4R are hung on the left and right ears when the heating element 1 is worn on the face. Among the pair of ear hanging parts 4L, 4R, one ear hanging part 4L is arranged at the end of the left side of the main body 2, and the other ear hanging part 4R is arranged at the end of the right side of the main body 2.

A pair of ear hanging parts 4L, 4R is made of a sheet material and has stretchability. The stretchability is preferably as follows: the stretching length of the body 2 in the lateral outer side (i.e., from the body 2 toward the ear when wearing the heating element 1) is longer than the stretching length of the body 2 in the longitudinal direction (i.e., the direction orthogonal to the direction from the body 2 mentioned above). If a pair of ear hanging parts 4L, 4R has stretchability, the pair of ear hanging parts 4L, 4R can be easily hung on the ears when the heating element 1 is worn on the face. Furthermore, a pair of ear hanging parts 4L, 4R does not necessarily have to have stretchability, and can also have the property of stretching but weak contraction or non-contractability, or the property of non-stretching and non-contracting.

The material of the pair of ear hanging parts 4L, 4R is not particularly limited, and woven fabrics, non-woven fabrics, resin films, etc. can be cited as examples. The pair of ear hanging parts 4L, 4R can use these materials alone or a laminated body combining most of them. The fiber material of the woven fabric or non-woven fabric can be exemplified by 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; mixed fibers of these fibers, etc. These fiber materials can be used alone or in combination of two or more. The resin used in the resin film is not particularly limited, and examples thereof include polyethylene, polypropylene, polyolefin, polyester, polyamide, polyurethane, polystyrene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polycarbonate, ethylene-ethyl acetate copolymer, etc. These resins can be used alone or in combination of two or more.

When the heating element 1 shown in FIG. 1(B) is worn in a closed state in front of the face, a pair of ear hooks 4L, 4R overlap on the main body 2. The pair of ear hooks 4L, 4R respectively present the same shape in the left and right halves bounded by the longitudinal center line 24 of the main body 2, the upper and lower edges of the pair of ear hooks 4L, 4R are located on the upper edge 20 and the lower edge 21 of the main body 2 (overlapping), the side edges of one side of the pair of ear hooks 4L, 4R are located on the left and right side edges 22, 23 of the main body 2 (overlapping), and the side edges of the other side of the pair of ear hooks 4L, 4R are located on the longitudinal center line 24 of the main body 2 (overlapping).

A pair of ear hooks 4L, 4R are respectively arranged at each end of the body 2 in the transverse direction by connecting a part of them to the end corresponding to the body 2 in the transverse direction. In the closed state as shown in FIG1(B), the outer ends (base ends) of the pair of ear hooks 4L, 4R are connected to the surface of the heating element 1 of the body 2 opposite to the face when worn on the face (the surface of the second sheet 27B). In this embodiment, the connection between the body 2 and the pair of ear hooks 4L, 4R is made by heat bonding (heat sealing), but in addition to heat bonding, well-known methods such as compression bonding with known adhesives, ultrasonic bonding, etc. can also be used, and combinations of these methods can also be used.

A pair of ear hooks 4L, 4R are self-superimposed on the main body 2 as shown in FIG1(B), and then unfolded after being folded back at each joint 5 with the main body 2 as shown in FIG3, FIG5 and FIG13(A), so as to be arranged on the ears.

As shown in FIG. 1(B) and FIG. 5, each joint 5 extends longitudinally along the main body 2 with a predetermined transverse width at the left and right ends of the main body 2. In this embodiment, each joint 5 extends longitudinally along the main body 2 with a predetermined transverse width starting from the left and right side edges 22, 23 of the main body 2. Therefore, the outer side contour line 50 of each joint 5 in the transverse direction of the main body 2 is located on the left and right side edges 22, 23 of the main body 2 (overlapping).

The inner side contour line 51 of each joint part 5 in the transverse direction of the main body 2 extends parallel to the longitudinal direction of the main body 2, but bends inwardly halfway to reach the lower edge 21 of the main body 2. Therefore, a part (protruding part 52) of each joint part 5 protrudes inwardly at the lower end side. Specifically, the inner side contour line 51 of each joint part 5 in this embodiment extends downwardly from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2, bends inwardly at a right angle (parallel to the transverse direction of the main body 2), and then extends further downward. Therefore, in this embodiment, the inner side contour line 51 of each joint 5 is composed of the third part 51C, the first part 51A and the second part 51B, the third part 51C extends from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2, the first part 51A is connected to the third part 51C and is bent from the inward bending part 51D to the transverse inner side of the main body 2, the second part 51B is connected to the first part 51A and extends from the lower edge 21 of the main body 2 in parallel with the longitudinal direction of the main body 2, and each joint 5 includes a part (protruding part 52) of the lower end protruding inward. The first part 51A is orthogonal to the third part 51C and extends in parallel with the transverse direction of the main body 2. From the perspective of ensuring the strength of the connection between the main body 2 and the ear hooks 4L, 4R, the distance between the third part 51C and the left and right side edges 22, 23 of the main body 2 is preferably 3 mm or more, and more preferably 5 mm or more. Furthermore, the third part 51C does not necessarily have to be parallel to the longitudinal direction of the main body 2, and may be slightly inclined inward or outward.

The inner side contour line 51 of each joint 5 determines the direction of the pair of ear hooks 4L, 4R from the closed state. In this embodiment, the lower end side of the inner side contour line 51 of each joint 5 protrudes inwardly compared with the upper end side. Therefore, as shown in Figures 3 and 5, the pair of ear hooks 4L, 4R are unfolded in a state of extending downwardly in a lateral direction relative to the main body 2 when each joint 5 is folded back and unfolded from the closed state shown in Figure 1 (B). Because the position of the ear is slightly lower than the eye, the heating element 1 can be comfortably worn on the user's face by unfolding the pair of ear hooks 4L, 4R in a slanted downward direction.

In addition, since the inner side contour line 51 of each joint portion 5 protrudes inwardly at the lower end side compared to the upper end side, as shown in Figure 6, in order to unfold a pair of ear hanging portions 4L, 4R and stretch the pair of ear hanging portions 4L, 4R outward, the lower side area of the main body 2 between the left and right ends of each joint portion 5 (near the left and right corners 25, 26 on the lower side of the main body 2) is strongly stretched. At this time, since the inner side contour line 51 of each joint 5 bends inwards midway and reaches the lower edge 21 of the main body 2, the main body 2 is deformed into the left and right ends, especially the lower area (near the left and right corners 25, 26 of the lower side of the main body 2) bending toward the user's face side (the front side of the figure in FIG. 6) through the bending of the inner side contour line 51 of each joint 5. As a result, the left and right corners 25, 26 of the lower side of the main body 2 cover the cheekbones under the eyes when the heating element 1 is worn on the face, and fit the face without floating from the face. Therefore, the closeness between the main body 2 and the face is improved. Thus, in this embodiment, by providing an inwardly curved portion 51D in the middle of the inner side contour line 51 of each joint 5, the area on the lower side of the left and right ends of the main body 2 (near the left and right corners 25, 26 on the lower side of the main body 2) can be easily deformed along the shape of the user's facial surface. Furthermore, the upper side areas on the left and right ends of the main body 2 (near the left and right corners on the upper side of the main body 2) are also deformed to bend toward the user's face side (the front side of the figure in FIG. 6) due to the bending of the inner side contour line 51 of each joint 5. Therefore, the upper side areas on the left and right ends of the main body 2 (near the left and right corners on the upper side of the main body 2) will not float from the face and fit the face, and the closeness with the face is improved.

As shown in FIG. 1(B) and FIG. 3, an opening 40 is formed in a pair of ear hanging parts 4L, 4R. The opening 40 is the part that is inserted into the ear when the pair of ear hanging parts 4L, 4R are hung on the user's ears. The opening 40 is formed horizontally and long, thereby, the ear can be easily inserted into the opening 40. In addition, the opening 40 is formed so that the upper and lower widths (the length in the direction orthogonal to the length direction) gradually increase from the base end side toward the front end side, that is, from the main body 2 toward the ear when the heating element 1 is worn. In this way, the ear can be easily inserted into the opening 40, and the fit of the pair of ear hanging parts 4L, 4R to the ear can be improved. Furthermore, as long as the ear can be inserted into the opening 40, the shape or size of the opening 40 is not particularly limited.

Next, the method of using the above-mentioned heating element 1 is explained. Because the heating material 3 generates heat in the presence of air, it is necessary to prevent contact with air before use, and store the heating element 1 in an airtight packaging bag (not shown) that does not allow air to circulate. When using, open the packaging bag and take out the heating element 1. In addition, unfold a pair of ear hanging parts 4L, 4R from the closed state, so that each second joint part 29L, 29R (eye covering part) of the main body 2 corresponds to the left and right eyes of the user, and the main body 2 is in contact with the user's face, while the pair of ear hanging parts 4L, 4R are stretched outward and hung on the ears. In this way, the heat generated by the self-heating material 3 is used to give warmth to the left and right eyes and the surrounding areas of each eye.

When the heating element 1 is worn on the face, the transverse central portion of the lower edge 21 of the main body 2 is bent into a concave shape, and the middle is greatly concave, so the main body 2 is easily folded into two halves at the longitudinal center line 24 at the transverse central position and deformed along the shape of the face. Therefore, the main body 2 fits the user's face well.

In addition, in the joint 5 between the pair of ear hanging parts 4L, 4R and the main body 2, because the inner side outline 51 is bent inwardly in the middle and then reaches the lower edge 21 of the main body 2, as shown in FIG6, relative to the main body 2 being stretched laterally outward to hang the pair of ear hanging parts 4L, 4R on the ears, the area on the lower side of the left and right ends of the main body 2 (near the left and right corners 25, 26 on the lower side of the main body 2) is subjected to a strong pulling force, and after bending in the longitudinal direction of the main body 2, it is deformed to bend toward the side of the user's face (the front side of the figure in FIG6). The left and right corners 25 and 26 on the lower side of the main body 2 correspond to the vicinity of the cheekbones under the eyes when the heating element 1 is worn on the face. Even if the cheekbones are protruding, they can be bent along the surface shape to cover the vicinity of the cheekbones and fit the face without floating from the face. Therefore, the main body 2 can fit the user's face more closely and suppress the heat generated by the self-heating material 3 from escaping to the outside.

As described above, according to the present embodiment of the heating element 1, since the main body 2 can be well attached to the user's face, the heating effect generated by the heating material 3 can be effectively guided, and the user's eyes or peri-eye area can be effectively warmed.

The above describes the implementation form of the present invention, but the present invention is not limited to the aforementioned implementation form, and various changes can be made without departing from the purpose of the present invention.

For example, in each joint part 5 of a pair of ear hooks 4L, 4R in the aforementioned embodiment, the inner side contour line 51 is bent inwardly midway to form an inwardly protruding portion 52 (hereinafter referred to as "protruding portion 52"), which is formed continuously and uninterruptedly. However, as shown in FIG7, the protruding portion 52 of each joint part 5 does not necessarily need to be formed continuously, but can also be formed intermittently midway. The protruding portion 52 of each joint part 5 can also contain at least one partition 54 arranged at intervals in the horizontal direction of the main body 2. Furthermore, although the diagram of the left half of the heating element 1 is omitted in FIG7, it has the same structure as the right half.

In FIG. 7(A), the protruding portion 52 of each joint 5 is composed of a bent portion 53 and two partitions 54. The bent portion 53 is continuously bent inward at the lower end of each joint 5, and the partitions 54 are arranged at intervals in the horizontal direction of the main body 2 from the bent portion 53. In FIG. 7(B), the protruding portion 52 of each joint 5 is composed of three partitions 54. The partitions 54 are arranged at intervals in the horizontal direction of the main body 2 at the lower end of each joint 5.

Furthermore, in the present disclosure, the contour line of the joint 5 refers to the line that forms the surrounding shape of the entire outer shape of the joint 5. In the variant example of Figure 7, the inner contour line 51 of each joint 5 is also the same as that of the aforementioned embodiment (refer to Figure 1 (B) etc.), extending downward from the upper edge 20 of the main body 2 parallel to the longitudinal direction of the main body 2, bending inward at a right angle (parallel to the transverse direction of the main body 2), and extending further downward. The inner side contour line 51 is composed of a third portion 51C, a first portion 51A, and a second portion 51B. The third portion 51C extends from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2. The first portion 51A is connected to the third portion 51C and extends from the inwardly bent portion 51D in parallel with the transverse direction of the main body 2. The second portion 51B is connected to the first portion 51A and extends from the lower edge 21 of the main body 2 in parallel with the longitudinal direction of the main body 2. The first part 51A of the inner side contour line 51 is represented by a line connecting the upper edges of the bent portion 53 and the two partitions 54 in the variant of FIG. 7(A), and by a line connecting the upper edges of the three partitions 54 in the variant of FIG. 7(B). Furthermore, in FIG. 7, in order to easily identify the contour line 51, the contour line 51 is illustrated at a position slightly offset from the actual position of the inner side contour line of the joint 5.

The partition 54 has a predetermined width and extends parallel to the longitudinal direction of the main body 2 on the side of the lower edge 21 of the main body 2. The partition 54 is formed to have a length that does not reach the upper edge 20 of the main body 2, preferably a length that does not reach the longitudinal center of the main body 2. Furthermore, the partition 54 may extend from the lower edge 21 of the main body 2, or may extend from the lower edge 21 of the main body 2 to a position separated by a predetermined distance in the longitudinal direction of the main body 2. Furthermore, as long as the partition 54 is along the longitudinal direction of the main body 2, it does not necessarily have to extend parallel to the longitudinal direction, and may extend obliquely to the inside or outside to some extent. Furthermore, in the case where there are a plurality of partitions 54, the upper and lower ends of the plurality of partitions 54 may be located at the same position in the horizontal direction of the main body 2, or may be located at different positions.

In the modification example of FIG. 7 , since the inner contour line 51 of the joint 5 between the pair of ear hooks 4L, 4R and the main body 2 bends inward midway and then reaches the lower edge 21 of the main body 2, when the main body 2 is stretched laterally outward to hang the pair of ear hooks 4L, 4R on the ears, the lower areas of the left and right ends of the main body 2 (near the left and right corners 25, 26 on the lower side of the main body 2) are strongly stretched and deformed to bend toward the sides of the user's face. The left and right corners 25 and 26 on the lower side of the main body 2 correspond to the vicinity of the cheekbones under the eyes when the heating element 1 is worn on the face. Even if the cheekbones are protruding, they can be bent along the surface shape to cover the vicinity of the cheekbones and fit the face without floating from the face. Therefore, the main body 2 can fit the user's face more closely and prevent the heat generated by the self-heating material 3 from escaping to the outside.

In addition, the corner 55 where the first part 51A and the second part 51B of the inner side outline 51 of each joint part 5 is crossed is the part that receives the most load when the body part 2 is stretched laterally outward to hang the pair of ear hanging parts 4L, 4R on the ears. If the corner 55 receives too much load, the ear hanging parts 4L, 4R may break at the corner 55. At this time, as in the above-mentioned embodiment (refer to FIG. 1 (B) etc.), if the upper edge of the protruding part 52 of each joint part 5 extends continuously parallel to the horizontal direction of the body part 2, there is a possibility that the ear hanging parts 4L, 4R may break starting from the corner 55 and continuously spread along the upper edge of the protruding part 52 to the inner bending part 51D. In contrast, in the variation of FIG. 7 , since the upper edge of the protruding portion 52 of each joint portion 5 is parallel to the transverse direction of the main body portion 2 and extends intermittently, even if the ear hook portion 4L, 4R is broken at the corner 55, the continuous break of the ear hook portion 4L, 4R can still be temporarily stopped at a position without the upper edge of the protruding portion 52, which can prevent the break of the ear hook portion 4L, 4R from continuously spreading to the inward bending portion 51D of each joint portion 5.

As for other variations, in the aforementioned embodiments, in each joint 5 of a pair of ear hooks 4L, 4R, the inner contour line 51 is bent at a right angle inward (parallel to the transverse direction of the main body 2) in the middle, but as shown in Figures 8 and 9, as long as the inner contour line 51 is bent inward in the middle, it is not necessarily necessary to bend at a right angle (parallel to the transverse direction of the main body 2). Furthermore, the diagram of the left half of the heating element 1 is omitted in Figures 8 and 9, but it has the same structure as the right half.

For example, in the modified example of FIG. 8 (A), each joint portion 5 of a pair of ear hooks 4L, 4R is bent so that the inner contour line 51 becomes convex inwardly midway and reaches the lower edge 21 of the main body 2. Thus, a portion (protruding portion 52) of each joint portion 5 including the lower end portion protrudes inwardly. In the variation of FIG. 8(A), the inner side contour line 51 of each joint portion 5 is composed of a third portion 51C and a first portion 51A, wherein the third portion 51C extends from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2, and the first portion 51A is connected to the third portion 51C and bends convexly from the inward bending portion 51D on the transverse inner side of the main body 2 and reaches the lower edge 21 of the main body 2, and may also have a second portion, which is connected to the first portion 51A and extends from the lower edge 21 of the main body 2 in parallel with the longitudinal direction of the main body 2.

8 (B), each joint portion 5 of a pair of ear hooks 4L, 4R is bent so that the inner contour line 51 becomes concave inwardly midway and reaches the lower edge 21 of the main body 2. Thus, a portion of each joint portion 5 including a lower end portion (protruding portion 52) protrudes inwardly. In the variation of Fig. 8(B), the inner side contour line 51 of each joint 5 is composed of the third part 51C, the first part 51A and the second part 51B. The third part 51C extends from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2. The first part 51A is connected to the third part 51C and bends concavely in the transverse inner side of the main body 2 from the inward bending part 51D. The second part 51B is connected to the first part 51A and extends from the lower edge 21 of the main body 2 in parallel with the longitudinal direction of the main body 2. Alternatively, the second part 51B may be absent, and the first part 51A may be bent and reach the lower edge 21 of the main body 2.

9 (A), the inner side outline 51 of each joint portion 5 of a pair of ear hooks 4L, 4R is bent inwardly at midway to be inclined downwardly relative to the transverse direction of the main body 2 and then reaches the lower edge 21 of the main body 2. Thereby, a portion (protruding portion 52) of each joint portion 5 including the lower end portion protrudes inwardly. In the variation of FIG. 9(A), the inner side contour line 51 of each joint 5 is composed of the third part 51C, the first part 51A and the second part 51B. The third part 51C extends from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2. The first part 51A is connected to the third part 51C and is bent from the inward bending part 51D to be inclined downward toward the transverse inner side of the main body 2. The second part 51B is connected to the first part 51A and extends from the lower edge 21 of the main body 2 in parallel with the longitudinal direction of the main body 2. Alternatively, the second part 51B may be absent, and the first part 51A may be bent to be inclined downward and reach the lower edge 21 of the main body 2.

9 (B), the inner contour line 51 of each joint portion 5 of a pair of ear hooks 4L, 4R is bent inwardly in the middle to form a step-like shape with a plurality of height differences and then reaches the lower edge 21 of the main body 2. Thereby, a portion (protruding portion 52) including the lower end portion of each joint portion 5 protrudes inwardly. In the variation of FIG. 9(B), the inner side contour line 51 of each joint portion 5 is composed of a third portion 51C, a first portion 51A and a second portion 51B. The third portion 51C extends from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2. The first portion 51A is connected to the third portion 51C and is bent into a step shape from the inward bending portion 51D on the transverse inner side of the main body 2. The second portion 51B is connected to the first portion 51A and extends from the lower edge 21 of the main body 2 in parallel with the longitudinal direction of the main body 2.

In addition, as shown in the variation of FIG. 9(C), the inner side outline 51 of each joint portion 5 of a pair of ear hook portions 4L, 4R is bent inwardly at midway to be inclined downwardly relative to the transverse direction of the main body portion 2 and reach the lower edge 21 of the main body portion 2, or a part of each joint portion 5 may be diverged, and the diverged part 52 may protrude inwardly. In the variation of FIG. 9(C), the inner side contour line 51 of each joint 5 is composed of the third part 51C, the first part 51A and the second part 51B. The third part 51C extends from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2. The first part 51A is connected to the third part 51C and is bent from the inward bending part 51D to be inclined downward toward the transverse inner side of the main body 2. The second part 51B is connected to the first part 51A and extends from the lower edge 21 of the main body 2 in parallel with the longitudinal direction of the main body 2. Alternatively, the second part 51B may be absent, and the first part 51A may be bent to be inclined downward and reach the lower edge 21 of the main body 2.

In the modification examples of Figures 8 and 9, in the joint 5 between the pair of ear hooks 4L, 4R and the main body 2, since the inner contour line 51 bends inward halfway and reaches the lower edge 21 of the main body 2, when the main body 2 is stretched laterally outward to hang the pair of ear hooks 4L, 4R on the ears, the area on the lower side of the left and right ends of the main body 2 (near the left and right corners 25, 26 on the lower side of the main body 2) is subjected to strong pulling force and deformed to bend toward the side of the user's face. The left and right corners 25 and 26 on the lower side of the main body 2 correspond to the vicinity of the cheekbones under the eyes when the heating element 1 is worn on the face. Even if the cheekbones are protruding, they can be bent along the surface shape to cover the vicinity of the cheekbones and fit the face without floating from the face. Therefore, the main body 2 can fit the user's face more closely and prevent the heat generated by the self-heating material 3 from escaping to the outside.

In addition, in the modified examples of Figures 8 and 9, when the main body 2 is stretched laterally outward to hang a pair of ear hanging parts 4L, 4R on the ears, the predetermined position 56 of the inner side contour line 51 of each joint 5 will be subjected to the greatest load. If the position 56 is subjected to excessive load, there is a concern that the ear hanging parts 4L, 4R will break at the position 56. In contrast, in the variant examples of Figures 8 and 9, with respect to the portion of the inner contour line 51 of each joint portion 5 that bends inwardly, except for the portion extending from the lower edge 21 of the main body 2 in parallel with the longitudinal direction of the main body 2, the portion of the inner contour line 51 of each joint portion 5 that bends inwardly intersects with an imaginary line 57 parallel to the transverse direction of the main body 2, and the upper edge of the protruding portion 52 of each joint portion 5 does not extend in parallel with the transverse direction of the main body 2. Therefore, even if the ear hook 4L, 4R is broken at the predetermined position 56 of the inner side contour line 51 in each joint 5, the break of the ear hook 4L, 4R will not spread from the position 56 in parallel to the transverse direction of the main body 2, because the upper edge of the protruding portion 52 is located above the outer side of the position 56, so the upper edge of the protruding portion 52 is used as a barrier to suppress the break of the ear hook 4L, 4R from spreading to the inner side bending position 51D of each joint 5. Therefore, the break of the ear hook 4L, 4R can be prevented from continuously spreading to the inner side bending position 51D of each joint 5 starting from the position 56 where the break occurs.

Furthermore, in order to effectively suppress the continuous spread of the fracture of the ear hanging parts 4L, 4R to the inward bending part 51D of each joint part 5, it is preferred that the first part 51A of the inner side contour line 51 of each joint part 5 is bent into a step shape as shown in FIG9 (B). In addition, in order to effectively reduce the load applied to the predetermined part 56 of the inner side contour line 51 of each joint part 5 when the main body 2 is stretched laterally outward to hang a pair of ear hanging parts 4L, 4R on the ear, it is preferred that the first part 51A of the inner side contour line 51 of each joint part 5 is bent into a convex shape as shown in FIG8 (A).

In the modified examples of Fig. 8 and Fig. 9, the protrusion 52 in each joint part 5 of a pair of ear hanging parts 4L, 4R does not necessarily need to be formed continuously, and can also be formed intermittently with a break in the middle as shown in Fig. 10. In Fig. 10, the protrusion 52 of each joint part 5 includes at least one partition 54 arranged at intervals in the horizontal direction of the main body 2. In Fig. 10 (A) (B), the protrusion 52 of each joint part 5 is composed of three partitions 54 arranged at intervals in the horizontal direction of the main body 2 at the lower end of each joint part 5. In FIG. 10 (C), a portion of each joint 5 diverges inward, and the divergent portion becomes a protruding portion 52, which is composed of three partitions 54 that are staggered in the longitudinal direction of the main body 2 and are spaced apart in the transverse direction of the main body 2. Furthermore, although the diagram of the left half of the heating element 1 is omitted in FIG. 10, it has the same structure as the right half.

In the modification of FIG. 10 , the outline of the joint 5 refers to the line that forms the shape of the entire outer shape of the joint 5. In FIG. 10 (A), the inner side outline 51 of each joint 5 is bent inwardly at halfway to be inclined downward relative to the horizontal direction of the main body 2 and then reaches the lower edge 21 of the main body 2. The inner side outline 51 is formed by the third part 51C, the first part 51A and the second part 51B. The third part 51C extends from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2, the first part 51A is connected to the third part 51C and is bent from the inward bend 51D to be inclined downward toward the transverse inner side of the main body 2, and the second part 51B is connected to the first part 51A and extends from the lower edge 21 of the main body 2 in parallel with the longitudinal direction of the main body 2. The first part 51A of the inner side contour line 51 is represented by a line connecting the upper edges of the three partitions 54 from the inward bend 51D. The inner side contour line 51 in Figure 10 (A) may also be without the second part 51B, and the first part 51A is bent to be inclined downward and reach the lower edge 21 of the main body 2.

In the variation of Figure 10 (B) (C), the inner side contour line 51 of each joint portion 5 is bent inwardly in the middle to form a step shape with a plurality of height differences and then reaches the lower edge 21 of the main body 2. The inner side contour line 51 is composed of a third part 51C, a first part 51A and a second part 51B. The third part 51C extends from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2. The first part 51A is connected to the third part 51C and is bent from the inward bend 51D in the transverse direction of the main body 2 to form a step shape. The second part 51B is connected to the first part 51A and extends from the lower edge 21 of the main body 2 in parallel with the longitudinal direction of the main body 2. The first part 51A of the inner side contour line 51 is represented by a line connecting the upper edges of the three partitions 54 and the upper part of the inner side edge from the inward bend 51D. Furthermore, in FIG. 10 , in order to easily identify the contour line 51, the contour line 51 is illustrated at a position slightly offset from the actual position of the inner side contour line of the joint 5.

The variation of FIG. 10 also shows the same effect as the variation of FIG. 8 and FIG. 9. In addition, in the variation of FIG. 10, since the upper edge of the protruding portion 52 of each joint 5 is formed intermittently, even if the ear hook 4L, 4R is broken, the continuous break of the ear hook 4L, 4R can be temporarily stopped at each partition 54, which can prevent the break of the ear hook 4L, 4R from continuously spreading to the inward bending portion 51D of each joint 5.

As for other variations, in the aforementioned embodiment, each joint portion 5 of a pair of ear hooks 4L, 4R reaches the lower edge 21 of the main body 2 by making the inner side contour line 51 bend inwardly in the middle, as shown in Figures 11 and 12, and a part of the lower end side (protruding part 52) protrudes inwardly, but the inner side contour line 51 can also be bent inwardly in the middle and reach the upper edge 20 of the main body 2, so that another part of the upper end side (protruding part 58) protrudes inwardly. Furthermore, the diagram of the left half of the heating element 1 is omitted in Figures 11 and 12, but it has the same structure as the right half.

For example, in the modified example of FIG. 11(A), the inner side contour line 51 of each joint portion 5 is composed of a third portion 51G, first portions 51A, 51E, and second portions 51B, 51F. The third portion 51G extends parallel to the longitudinal direction of the main body 2. The first portions 51A, 51E are connected to the lower end or upper end of the third portion 51G and are bent from the inwardly bent portions 51D, 51H in the transverse direction of the main body 2, respectively. The second portions 51B, 51F are connected to the first portions 51A, 51E and extend parallel to the longitudinal direction of the main body 2 from the lower edge 21 or the upper edge 20 of the main body 2. The first portions 51A, 51E are orthogonal to the third portion 51G and extend parallel to the transverse direction of the main body 2. In the variation of FIG. 11(A), the first part 51A, 51E is bent at a right angle inwardly relative to the third part 51G (parallel to the transverse direction of the main body 2), and can also be bent into a step shape with a plurality of height differences, bent to be tilted downward or upward relative to the transverse direction of the main body 2, or bent to be concave or convex. Furthermore, the third part 51G does not necessarily have to be parallel to the longitudinal direction of the main body 2, and can also be tilted inwardly or outwardly to some extent.

Moreover, as shown in the variation of FIG. 11(B), the inner side contour line 51 of each joint portion 5 may be composed of only the first portion 51A, 51E and the third portion 51G without the second portion 51B, 51F, and the first portion 51A, 51E reaches the lower edge 21 or the upper edge 20 of the main body 2. In the variation of FIG. 11(B), although the first portion 51A, 51E is bent to bulge inward, it may be bent to be concave inward, or be bent to be inclined downward or upward relative to the transverse direction of the main body 2. Furthermore, although the diagram is omitted in the variant of FIG. 11 (A) (B), it is the same as the variant of FIG. 9 (C), in that a portion of each joint portion 5 diverges inward at its lower end and upper end, and the divergent portion may also be a protruding portion 52, 58.

Moreover, as shown in the modified example of FIG. 12 (A) (B), the inner side contour line 51 of each joint portion 5 may also be composed of only the first part 51A, 51E without the second part 51B, 51F and the third part 51G. In the modified example of FIG. 12 (A) (B), the inner side contour line 51 of each joint portion 5 has one inwardly curved part 51D, and the first part 51A bends inwardly from the part 51D to reach the lower edge 21 of the main body 2, and the first part 51E bends inwardly from the part 51D to reach the upper edge 20 of the main body 2. In the variation of FIG. 12 (A), the first parts 51A and 51E are bent inwardly to be inclined downward or upward relative to the horizontal direction of the main body 2. In the variation of FIG. 12 (B), the first parts 51A and 51E are bent inwardly to be concave, but the first parts 51A and 51E may also be bent inwardly to be convex.

In other variants, in the aforementioned embodiment, in each joint portion 5 of a pair of ear hooks 4L, 4R, the transverse outer contour line 50 of the main body 2 overlaps with the left and right side edges 22, 23 of the main body 2, but as shown in FIG12(C), the outer contour line 50 of each joint portion 5 may not overlap with the left and right side edges 22, 23 of the main body 2. Furthermore, the joint portion 5 of any shape in the aforementioned embodiment and variants may be formed so that the outer contour line 50 does not overlap with the left and right side edges 22, 23 of the main body 2. However, if the outer contour line 50 overlaps with the left and right side edges 22, 23 of the main body 2 to form the joint 5, it is better to fix the pair of ear hooks 4L, 4R to the main body 2 so that they are not easily peeled off.

As for other variations, in the aforementioned embodiments, as shown in FIG. 3, FIG. 5 and FIG. 13 (A), the pair of ear hanging parts 4L, 4R are unfolded by folding back each joint part 5 to be arranged on the ear, but as shown in FIG. 13 (B), the pair of ear hanging parts 4L, 4R can be unfolded horizontally toward the main body 2 in the normal state, and their ends are connected to the left and right ends of the main body 2.

As for other variations, in the aforementioned embodiment, as shown in FIG. 1 , the left and right second joints 29L and 29R are separated, but the left and right second joints 29L and 29R can also be connected in the left and right direction of the main body 2.

As for other variations, in the aforementioned embodiment, as shown in FIG. 1 , the storage area for storing the heat generating material 3 in the main body 2 is connected between the left and right eye covering parts 29L, 29R, but as shown in FIG. 14 , a third joint part 30 extending parallel to the longitudinal direction of the main body 2 may be provided between the left and right eye covering parts 29L, 29R along the longitudinal center line 24. The third joint part 30 is the same as the first joint part 28 and the second joint part 29L, 29R, and is a part of the two sheets 27A, 27B constituting the main body 2 joined by well-known methods such as thermal bonding (heat sealing), compression bonding using a known adhesive, ultrasonic bonding, or a combination of these methods.

In other variations, in the aforementioned embodiment, as shown in FIG. 1 , the eye covering portion of the main body 2 is provided with the second joint portion 29L, 29R, and the eye covering portion does not contain the heat generating material 3, and is separated from the surrounding covering portion nearby. However, the eye covering portion and the surrounding covering portion may not be separated, and the eye covering portion may also contain the heat generating material.

1: Warm parts

2: Main body

4L, 4R: Ear hooks

5: Joint

20: The upper edge of the main body

21: The lower edge of the main body

22: Left edge of the body

23: Right edge of the body

25: Left corner of the lower side of the main body

26: Right corner of the lower side of the main body

27B: Sheet

28: 1st joint

29L, 29R: Second joint

50: Outer contour of the joint

51: Inner contour of the joint

51A: Part 1

51B: Part 2

51C: Part 3

51D: Inward bend

52: Protruding part

55: Angle

Claims (9)

A heating element, an eye mask type heating element worn on the face of a user, comprising: a heating material; a main body portion, which accommodates the heating material and covers the left and right eyes and the periphery of each eye when worn; and a pair of ear hanging portions, which are hung on the ears when worn; one of the pair of ear hanging portions is arranged at the end of the left side of the main body portion, and the other is arranged at the end of the right side of the main body portion; the pair of ear hanging portions Each of the parts includes a joint part connected to the end of the corresponding main body part; the contour line of each joint part of the pair of ear hooks in the middle inner side of the main body part in the horizontal direction bends inwards halfway and reaches the lower edge of the main body part, so a part of each joint part protrudes inwards, and the lower end side of the contour line of the inner side of each joint part of the pair of ear hooks protrudes inwards more than the upper end side. As for the heating element of claim 1, in each joint of the pair of ear hooks, the inwardly curved portion of the inner contour line can be composed of the following first and second parts: the first part is a part extending from the inwardly curved portion parallel to the transverse direction of the main body; the second part is a part connected to the first part and extending parallel to the longitudinal direction orthogonal to the transverse direction of the main body to the lower edge of the main body. As for the heating element of claim 1, the portion of the aforementioned inner side contour line bending inward in each joint of the aforementioned pair of ear hooks, excluding the portion extending from the lower edge of the aforementioned main body to the longitudinal direction orthogonal to the transverse direction of the aforementioned main body, the portion of the aforementioned inner side contour line bending inward intersects with an imaginary line parallel to the transverse direction of the aforementioned main body. A heating element as claimed in any one of claims 1 to 3, wherein the portion protruding inwardly in each joint of the pair of ear hooks contains at least one partition disposed at intervals in the horizontal direction of the main body. A heating element as claimed in any one of claims 1 to 3, wherein each joint of the pair of ear hooks overlaps the left and right side edges of the body at the horizontal middle and outer sides of the body. As in claim 4, the joints of the pair of ear hooks overlap the left and right edges of the main body at the horizontal middle and outer sides of the main body. A heating element as claimed in any one of claims 1 to 3, wherein the pair of ear hooks can be unfolded by folding back each joint while being overlapped on the main body. As in claim 4, the heating element, wherein the pair of ear hooks can be unfolded by folding back each joint while being overlapped on the main body. As in claim 5, the heating element, wherein the pair of ear hooks can be unfolded by folding back each joint portion while being overlapped on the main body.