JP7362437B2 - Eye mask type heating device - Google Patents

Description

The present invention relates to an eye mask-type heating tool that is worn on a user's face, and more particularly to an eye-mask-type heating tool that provides heat by heat generated from a heat-generating material due to contact with air.

BACKGROUND ART Eye mask-type heating tools have been known that are attached to a user's face and can apply heat to the left and right eyes and the surrounding area of each eye (for example, see Patent Document 1). The heating tool of Patent Document 1 includes a heat-generating material that generates heat upon contact with air and a main body that houses the heat-generating material, and when the main body is placed on the face, heat is generated from the heat-generating material. By doing so, heat can be applied to the user's left and right eyes and the area around each eye.

Unexamined Japanese Patent Publication No. 2014-8269

By applying heat to the user's left and right eyes and the area around each eye, it is possible to relieve eye fatigue, relieve muscle stiffness around the eyes, and provide a relaxing effect. However, in the heating tool of Patent Document 1, when looking at the temperature distribution of the main body, the temperature of the main body tends to be locally high, and the overall temperature also tends to be high. The parts of the main body that are locally heated include the eye covering, and if the eyes (eyeballs) are heated too high, the heat may cause denaturation of proteins in the cornea. Additionally, if the overall temperature of the body becomes too high, there is a risk of low-temperature burns when the heating device is worn on the face for a long time. Therefore, heating tools need to be designed to warm the eyes (eyeballs) and their surroundings at appropriate temperatures.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an eye mask-type heating tool that warms the eyes (eyeballs) and the area around the eyes at an appropriate temperature.

TECHNICAL FIELD The present invention relates to an eye mask-type heating device that is used by being attached to a user's face. The heating tool of the present invention includes a heat-generating material that generates heat upon contact with air, and a main body that accommodates the heat-generating material and covers the eyes and the area around the eyes when worn, and the main body comes into contact with the eyes when worn. The eye covering part is separated from the surrounding covering part which is the part around the eye, and the eye covering part is characterized in that the filling rate of the heat generating material is lower than that of the surrounding covering part.

In the heating tool of the present invention, the eye covering portion may be configured so that the heat generating material is not accommodated therein.

The heating tool of the present invention can be configured to further include a pair of ear hooks that are hung over the ears when worn.

In the heating tool of the present invention, the filling rate of the heat generating material in the eye covering part of the main body is lower than that of the surrounding covering part, so that the heat generating material generates weak or no heat. Further, the eye covering portion of the main body portion is separated from the surrounding covering portion, and conduction of heat from the surrounding covering portion to the eye covering portion is suppressed. Therefore, it is possible to prevent the temperature from increasing in the eye covering portion of the main body. Therefore, when the heating tool is attached to the face, the eyes (eyeballs) can be heated at an appropriate temperature without being heated to high temperatures.

In addition, the main body is divided into an eye covering section with a low filling rate of heat-generating material inside the surrounding covering section, which lowers the maximum temperature of the main body and suppresses high local temperature rises in the main body. It will be done. Furthermore, the area of the high temperature region including the lowered maximum temperature is increased, thereby improving the uniformity of temperature distribution. Therefore, when the heating tool is attached to the face, the area around the left and right eyes can be heated widely and uniformly to an appropriate temperature.

(A) is a front view of the heating tool of this embodiment, and (B) is a back view of the heating tool of this embodiment. FIG. 2 is a perspective view of the heating tool of the present embodiment. FIG. 3 is a rear view of the heating tool of the present embodiment in a state where a pair of ear hooks are unfolded. 4 is a sectional view taken along line X1-X1 in FIG. 3. FIG. FIG. 3 is a rear view of the main body. FIG. 7 is a rear view of the main body when the pair of ear hooks are pulled outward in the lateral direction of the main body in the heating tool of the present embodiment. (A) is a schematic sectional view showing the relationship between the main body part and the ear hook part of the heating tool of the present embodiment, and (B) is a schematic sectional view showing the relationship between the main body part and the ear hook part of the heating tool of the modification. FIG. (A) is a front view of a heating device of a modification, and (B) is a rear view of a heating device of a modification. It is a figure showing temperature distribution of the main part concerning an example and a comparative example. It is a figure which shows the temperature distribution of the main body part based on a reference example.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an eye mask type heating tool (hereinafter simply referred to as "heating tool") according to the present invention will be described with reference to the drawings. The heating device is used by attaching it to the user's face, and by applying heat to the left and right eyes and the area around each eye, it relieves eye fatigue, loosens stiffness in the muscles around the eyes, and has a relaxing effect. can be granted. In addition, the area around the eyes 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, the area from the corner of the eye to the area between the eye and the ear. Refers to the range up to.

As shown in FIGS. 1 to 5, the heating tool 1 of the present embodiment includes a heat generating material 3, a main body 2 containing the heat generating material 3, and a pair of ears provided at the left and right ends of the main body 2. It includes hanging parts 4L and 4R. The heating tool 1 is worn on the face by hanging the ear hooks 4L and 4R on the corresponding left and right ears so that the main body 2 covers the left and right eyes and the area around each eye. . The heating tool 1 provides heat to the left and right eyes that come into contact with the main body 2 and the periphery of each eye by the heat generating material 3 housed in the main body 2 generating heat. The heating tool 1 is similar to, for example, a disposable body warmer, and uses a heat-generating material 3 that uses reaction heat generated due to an oxidation reaction as a heat source.

First, the heat generating material 3 is a powdery material that generates heat upon contact with air. Examples of this type of heat generating material 3 include oxidizable metals, activated carbon, carbon black, water retention agents (e.g. wood flour, vermiculite, diatomaceous earth, perlite, silica gel, alumina, water absorbing resins, etc.), metal salts (e.g. Examples include compositions containing appropriate amounts of salt, etc.) and water, respectively. The oxidizable metal is a metal that emits heat of oxidation reaction, and includes, for example, one or more powders and fibers selected from iron, aluminum, zinc, manganese, magnesium, and calcium. Among these, iron powder is preferred from the viewpoints of ease of handling, safety, manufacturing cost, storage stability, and stability. Examples of the iron powder include one or more selected from reduced iron powder and atomized iron powder. As the above-mentioned composition, known compositions conventionally used in disposable body warmers can be used.

Next, the main body part 2 covers the left and right eyes and the surroundings of each eye when the heating tool 1 is attached to the face. The main body portion 2 is formed to be flat and laterally elongated in plan view, and is formed in a size sufficient to cover the left and right eyes and the surroundings of each eye. In a plan view, the main body part 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 vertical direction, and the center position in the horizontal direction is parallel to the vertical direction. It exhibits a laterally symmetrical shape with respect to a vertical center line 24 extending in .

In the present disclosure, the term "horizontal direction" refers to a direction in the main body 2 that is parallel to the left-right direction of the face (direction connecting the left and right ears) when the heating tool 1 is attached to the face, and the term "vertical direction" " is a direction perpendicular to the lateral direction, and refers to a direction parallel to the vertical direction of the face (direction connecting the forehead, nose, and chin) when the heating tool 1 is attached to the face in the main body 2. In this embodiment, the longitudinal direction of the main body portion 2 is the lateral direction. "Inside" refers to the vertical center line 24 side in the horizontal direction of the main body 2, and "outside" refers to the left and right side edges 22, 23 on the opposite side from the vertical center line 24 in the horizontal direction of the main body 2. Point. The "left-right direction" defines the left-right direction based on when the user wears the heating tool 1 on his face and faces forward. The definitions of these directions are not intended to limit the manner in which the heating tool 1 is used.

The upper edge 20 has a straight line or a curved shape with irregularities, whereas the lower edge 21 is positioned below the eyes when the heating device 1 is attached to the face, so it is shaped horizontally to follow the shape of the nose. It has a concave shape with a central portion in the direction. Further, the lower edge 21 extends obliquely downward with respect to the lateral direction from the lower end of the concavely constricted portion toward the left and right ends, and the lower left and right corners 25 and 26 of the main body 2 are located downwardly. It bulges out on the sides. As a result, the lower left and right corners 25 and 26 of the main body 2 cover up to the cheekbones under the eyes when the heating tool 1 is attached to the face. Although the lower left and right corners 25 and 26 of the main body portion 2 are rounded in this embodiment, they do not necessarily need to be rounded. Although the left and right side edges 22 and 23 have a linear shape in this embodiment, they may have a curved shape that is convexly curved outward.

The main body part 2 is formed in a bag shape, and has an accommodation space in which the heat generating material 3 is hermetically accommodated. The main body part 2 includes two sheet materials 27A and 27B of the same shape forming front and back surfaces, and is formed into a bag shape by joining the parts along the outer periphery of the two sheet materials 27A and 27B over the entire circumference. It is formed. In this embodiment, heat welding (heat sealing) is used to join the two sheet materials 27A, 27B, but in addition to heat welding, known methods such as pressure bonding using a known adhesive or ultrasonic welding may be used. These methods may be used or a combination thereof may be used.

The width dimension of the first joint portion 28, which joins the outer peripheral edges of the two sheet materials 27A and 27B, is not particularly limited, and may be set to an appropriate width dimension. Further, the width dimension of the first joint portion 28 may be substantially the same over the entire outer peripheral edge of the main body portion 2, or may be different as in this embodiment. In the present embodiment, the first joint portion 28 has a vertical edge portion along the left and right side edges 22 and 23 of the main body portion 2 than a width dimension of a horizontal edge portion along the upper edge 20 and a lower edge 21 of the main body portion 2. is formed so that its width dimension is wider. Further, the first joint portion 28 is formed so that the width of the vertical edge portion along the left and right side edges 22 and 23 of the main body portion 2 becomes wider toward the upper and lower sides. It is formed so that the width dimension is widest at the portions corresponding to the left and right corners 25 and 26 on the lower side.

The two sheet materials 27A and 27B constituting the main body part 2 have flexibility so as to follow the surface shape of the face when the heating tool 1 is attached to the face. The material for the two sheet materials 27A and 27B is not particularly limited, but in consideration of the strength and durability of the heat generating material 3 against heat generation, it is preferable to use a resin film.

The resin used for the resin film described above is not particularly limited, but a thermoplastic resin is preferable. Examples of thermoplastic resins include polyethylene, polypropylene, polyester, polyamide, polyurethane, polystyrene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polycarbonate, ethylene-vinyl acetate copolymer, polyethylene terephthalate, and the like. Among these, polyethylene, polypropylene, ethylene vinyl acetate copolymer, and polyethylene terephthalate can be preferably exemplified. These resins may be used alone or in combination of two or more.

In addition, the two sheet materials 27A and 27B are made by laminating a breathable woven fabric or non-woven fabric on the side opposite to the side facing the heat generating material 3 of the resin film, from the viewpoint of making the heating tool 1 feel good to the touch. It is preferable to construct it by a laminate.

Examples of the above-mentioned woven or non-woven fabrics include natural fibers such as cotton, hemp, silk, and paper; semi-synthetic fibers such as rayon and acetate; nylon, vinylon, polyester, acrylic, polyethylene, polypropylene, and polyvinyl chloride. Examples include synthetic fibers such as polyethylene terephthalate, polybutylene terephthalate, and mixed fibers of these fibers. Among them, from the viewpoint of improving the feel on the skin, nylon, polyester, and polypropylene can be preferably exemplified as fiber materials, and nylon, polyester, polyethylene terephthalate, and polyethylene terephthalate can be more preferably exemplified. These fiber materials may be used alone or in combination of two or more. The basis weight of the woven or nonwoven fabric is not particularly limited as long as it can prevent the heat generating material 3 from leaking to the outside of the main body 2, but it may be, for example, about 20 g/m ² or more and 90 g/m ² or less. preferable.

Of the two sheet materials 27A and 27B, the first sheet material 27A on the side opposite to the side facing the face when the heating tool 1 is attached to the face has breathability. In order to ensure air permeability, the resin film constituting the first sheet material 27A is, for example, a porous resin film or a resin film in which a plurality of perforations (not shown) are formed with needles, and a plurality of small holes are used. Air communicates between the inside and outside of the main body part 2 through the holes. The plurality of small holes may be formed in the entire area of the resin film, or may be formed in a part of the area. The size of each small hole is not particularly limited as long as it can prevent the heat generating material 3 from leaking to the outside of the main body part 2 through the small hole, and an example is 0.1 μm or more and 30 μm or less. be done. The shape and number of each small hole are not particularly limited either, and the size, shape, and number of each small hole are appropriately set in consideration of the heat generation temperature of the heat generating material 3 during use according to the air permeability of the main body part 2. be done.

In addition, when the heating tool 1 is used for the purpose of warming the left and right eyes and the surrounding area of each eye, the heat generation temperature is 30°C or more and 70°C or less in a 20°C environment, preferably 35°C or more and 60°C or less ( It is preferable that the temperature measurement method is designed to be set in accordance with Japanese Industrial Standard S4100.

Of the two sheet materials 27A and 27B, the second sheet material 27B on the side facing the face when the heating tool 1 is attached to the face has the same level of air permeability as the first sheet material 27A. The first sheet material 27A may have poor air permeability, which has greater resistance to air flow than the first sheet material 27A, or may have non-air permeability, which substantially prevents air from passing through. When the resin film constituting the second sheet material 27B is non-porous, a non-porous resin film with no perforations (not shown) is used.

Although the thickness of the two sheet materials 27A and 27B is not particularly limited, it is preferably about 0.1 mm or more and 2.0 mm or less. This makes it possible to make the main body part 2 soft and easy to fit the face, while maintaining a certain level of strength in the main body part 2.

Note that the two sheet materials 27A and 27B do not necessarily need to be composed of a laminate of a resin film and a woven or nonwoven fabric, and may be composed of a single resin film or a single woven or nonwoven fabric. It may be composed of.

In the main body portion 2, two sheet materials 27A and 27B are joined not only at the first joint portion 28 but also at a pair of second joint portions 29L and 29R. The pair of second joints 29L and 29R are arranged in the main body 2 at positions corresponding to the left and right eyes when the heating tool 1 is attached to the face. One second joint 29L hits and covers the left eye when the heating tool 1 is worn on the face, and the other second joint 29R hits and covers the right eye when the heating tool 1 is worn on the face. This corresponds to the left and right eye covering portions 8L and 8R in No. 2. Since each of the eye covering parts 8L and 8R is constituted by a pair of second joint parts 29L and 29R, it does not penetrate the main body part 2 in the thickness direction.

The heat generating material 3 is not accommodated in each of the eye covering portions 8L and 8R, so that the heat generating material 3 is not present. Further, each of the eye covering parts 8L and 8R is separated from a part (peripheral covering part) 9 that covers the area around the eyes in the main body part 2 by a pair of second joint parts 29L and 29R. Movement of the heat generating material 3 housed in the portion 9 to each eye covering portion 8L, 8R is restricted. The pair of second joint parts 29L and 29R have a horizontally elongated outer shape (including an elliptical shape), but the shape is not particularly limited as long as the corresponding eyes can be covered, for example. It may have a horizontally long rectangular shape, a diamond shape, or the like.

In addition, in this embodiment, the pair of second joint parts 29L and 29R are formed by joining two sheet materials 27A and 27B that constitute the main body part 2 over the entire area of each eye covering part 8L and 8R. There is. However, the present invention is not limited to this, and the pair of second joint parts 29L and 29R are formed by joining two sheet materials 27A and 27B that constitute the main body part 2 in a frame shape surrounding each eye covering part 8L and 8R. You may. In this case, the outer peripheral edge of each eye covering part 8L, 8R forms a pair of second joint parts 29L, 29R, and each eye covering part 8L, 8 surrounded by a pair of second joint parts 29L, 29R, Although it does not penetrate in the thickness direction of the main body portion 2 and the two sheet materials 27A and 27B are not joined, the heat generating material 3 is not accommodated therein, and is a portion where the heat generating material 3 does not exist.

In the main body part 2, since the heat generating material 3 is not present in each eye covering part 8L, 8R, the heat generating material 3 does not generate heat in each eye covering part 8L, 8R, and when the heating tool 1 is attached to the face, the left and right eyes are Do not heat directly with heat from heat generating material 3. Further, in the main body portion 2, each eye covering portion 8L, 8R is separated from the surrounding surrounding covering portion 9, so that conduction of heat from the surrounding covering portion 9 to each eye covering portion 8L, 8R is suppressed. . As a result, the temperature of the main body part 2 is suppressed from increasing in the eye covering parts 8L and 8R, and the left and right eyes (eyeballs) are not heated to a high temperature when the heating tool 1 is attached to the face. Designed to heat at just the right temperature.

In addition, the main body part 2 is divided into eye covering parts 8L and 8R in which no heat generating material 3 is present inside the surrounding covering part, so that the maximum temperature is lowered and local temperature increases are suppressed. It will be done. Furthermore, the area of the high temperature region including the lowered maximum temperature is increased, thereby improving the uniformity of temperature distribution. Thereby, the main body part 2 is designed to widely and uniformly warm the area around the left and right eyes to an appropriate temperature when the heating tool 1 is attached to the face.

Each of the covering parts 8L and 8R of the main body part 2 does not necessarily have to contain the heat-generating material 3, and if the filling rate of the heat-generating material 3 is lower than that of the surrounding covering part 9, the covering parts 8L and 8R may contain the heat-generating material 3. Good too. When the filling rate of the heat-generating material 3 in each eye-covering part 8L, 8R is low, the heat generation by the heat-generating material in each eye-covering part 8L, 8R becomes weak, so that the temperature of each eye-covering part 8L, 8R can be suppressed from increasing. . Therefore, when the heating tool 1 is attached to the face, it is possible to prevent the left and right eyes (eyeballs) from being heated to a high temperature and to warm them at an appropriate temperature. In addition, as in the case where the heat-generating material 3 is not present in each eye-covering portion 8L, 8R, the maximum temperature of the main body portion 2 is reduced, and local temperature increases are suppressed, and the reduced maximum temperature is The uniformity of temperature distribution is improved by increasing the area of the high temperature region. Therefore, when the heating tool 1 is attached to the face, the area around the left and right eyes can be warmed widely and uniformly to an appropriate temperature.

In addition, when the heat generating material 3 is accommodated in each eye covering part 8L, 8R, the filling rate of the heat generating material 3 in each eye covering part 8L, 8R is such that the temperature of each eye covering part 8L, 8R becomes 50 degrees Celsius or less. It is preferable to use a filling rate of 42° C. or less, and more preferably a filling rate of 42° C. or less. For example, the filling rate of the heat generating material 3 in each of the eye covering parts 8L and 8R is preferably 30% or less of the filling rate of the heat generating material 3 in the surrounding covering part 9, more preferably 10% or less. Note that, from the viewpoint of not heating the left and right eyes (eyeballs) at a high temperature, it is preferable that the heat-generating material 3 is not housed in each eye-covering part 8L, 8R of the main body part 2.

In the main body part 2, from the viewpoint of not heating the left and right eyes (eyeballs) at high temperatures when the heating tool 1 is attached to the face, it is also conceivable that the eye covering parts 8L and 8R are formed as through holes. However, if each eye covering part 8L, 8R is made into a through hole, when the heating device 1 is used as an eye mask while sleeping, the effect of the eye mask is lost because the main body part 2 cannot block external light. be exposed. Furthermore, when the heating tool 1 is attached to the face, the left and right eyes are exposed to the outside air, making it impossible to apply heat to the left and right eyes, and the temperature difference between the surroundings of each eye to which heat is applied is large. Become. Therefore, there is a possibility of feeling uncomfortable. In addition, when the heating tool 1 is attached to the face, the heat generated from the heat generating material 3 of the surrounding covering part 9 of the main body part 2 escapes to the outside air through the through holes, so that it can be effectively applied to the areas around the left and right eyes. There is a possibility that it will not be possible to provide heat. Therefore, as in the heating tool 1 of this embodiment, each eye covering part 8L, 8R of the main body part 2 is configured to cover the left and right eyes, so that each eye covering part 8L, 8R is a through hole. Compared to the case where the left and right eyes are not covered, it is more effective as an eye mask, and when the heating device 1 is attached to the face, it can provide just the right amount of heat to the left and right eyes to eliminate discomfort. This is effective in preventing the temperature of the heat applied to the surrounding area from decreasing.

Next, the pair of ear hooks 4L and 4R are hung on the left and right ears when the heating tool 1 is worn on the face. As for the pair of ear hooks 4L and 4R, one ear hook 4L is provided at the left end of the main body 2, and the other ear hook 4R is provided at the right end of the main body 2.

The pair of ear hook parts 4L and 4R are made of a single sheet material and have elasticity. This elasticity is determined by the extent to which the main body 2 stretches outward in the lateral direction, that is, in the direction away from the main body 2 toward the ear when the heating tool 1 is worn, and in the longitudinal direction of the main body 2, that is, in the direction toward the ear. , is preferably higher than the degree of elongation in the direction perpendicular to the direction away from the main body portion 2. When the pair of ear hooks 4L, 4R has elasticity, it is possible to easily hang the pair of ear hooks 4L, 4R on the ears when the heating tool 1 is attached to the face. Note that the pair of ear hooks 4L and 4R do not necessarily have to be stretchable, and may have the property of being stretchable but weakly contracting or not contracting, or may be of a property of neither stretching nor contracting. good.

The material of the pair of ear hooks 4L, 4R is not particularly limited, but may include woven fabric, nonwoven fabric, resin film, etc. The pair of ear hooks 4L, 4R may be made of these alone Alternatively, a laminate combining two or more of these may be used. Examples of woven or non-woven fiber materials include natural fibers such as cotton, linen, silk, and paper; semi-synthetic fibers such as rayon and acetate; nylon, vinylon, polyester, acrylic, polyethylene, polypropylene, polyvinyl chloride, and polyester. Examples include synthetic fibers such as butylene terephthalate; mixed fibers of these fibers, and the like. These fiber materials may be used alone or in combination of two or more. The resin used for the resin film is not particularly limited, but includes polyethylene, polypropylene, polyolefin, polyester, polyamide, polyurethane, polystyrene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polycarbonate, and ethylene-vinyl acetate copolymer. Examples include merging. These resins may be used alone or in combination of two or more.

The pair of ear hook parts 4L and 4R are stacked on the main body part 2 in the closed state before the heating tool 1 shown in FIG. 1(B) is attached to the face. The pair of ear hooks 4L, 4R have the same external shape as the left half and right half of the main body 2, respectively, with the vertical center line 24 as a boundary, and the upper edges of the pair of ear hooks 4L, 4R The lower edge is located (overlapping) on the upper edge 20 and lower edge 21 of the main body 2, and the side edges on one side of the pair of ear hooks 4L, 4R are on the left and right side edges 22, 23 of the main body 2. The other side edges of the pair of ear hook parts 4L and 4R are located on the vertical center line 24 of the main body part 2 (overlap).

The pair of ear hooks 4L and 4R are each attached to each end of the main body 2 in the lateral direction by having a portion thereof joined to the corresponding end of the main body 2 in the lateral direction. In the closed state shown in FIG. 1(B), the pair of ear hook parts 4L and 4R each have an outer end (base end) on the side facing the face when the heating tool 1 of the main body part 2 is attached to the face. (the surface of the second sheet material 27B). In this embodiment, heat welding (heat sealing) is used to join the main body part 2 and the pair of ear hook parts 4L, 4R, but other than heat welding, for example, pressure bonding using a known adhesive, ultrasonic Known means such as welding may be used, or a combination thereof may be used.

The pair of ear hook parts 4L and 4R are stacked on the main body part 2 as shown in FIG. 1(B), and as shown in FIGS. By folding it back at the joint 5 and unfolding it, it becomes ready to be attached to the ear.

As shown in FIGS. 1(B) and 5, each joint 5 extends along the vertical direction of the main body 2 with a predetermined width at the left and right ends of the main body 2. In this embodiment, each joint 5 extends along the longitudinal direction of the main body 2 from the left and right side edges 22 and 23 of the main body 2 with a predetermined width. Therefore, the outer side edges 50 of each joint 5 in the lateral direction of the main body 2 are located (overlapping) on the left and right side edges 22 and 23 of the main body 2.

The inner side edge 51 of each joint 5 in the lateral direction of the main body 2 extends parallel to the longitudinal direction of the main body 2, but bends inward halfway and reaches the lower edge 21 of the main body 2. . Specifically, in this embodiment, the inner side edge 51 of each joint 5 extends downward from the upper edge 20 of the main body 2 in parallel with the longitudinal direction of the main body 2, and then extends inward at a right angle ( (parallel to the lateral direction of the main body part 2), and extends further downward. Accordingly, each joint portion 5 includes a main portion 6 that extends parallel to the longitudinal direction of the main body portion 2 with a predetermined width, and a protrusion portion 7 that continuously curves inward at the lower end of the main portion 6 and protrudes inward. I'm here. The width of the main part 6 of each joint part 5 is preferably 3 mm or more, more preferably 5 mm or more, from the viewpoint of ensuring the joint strength between the main body part 2 and each ear hook part 4L, 4R.

Each joint portion 5 determines the direction in which the pair of ear hook portions 4L, 4R will unfold from the closed state. In this embodiment, the lower end side of each joint portion 5 protrudes more inward than the upper end side. Therefore, as shown in FIGS. 3 and 5, when the pair of ear hooks 4L and 4R are folded back and unfolded at each joint 5 from the closed state shown in FIG. It unfolds in a diagonal downward direction with respect to the horizontal direction. Since the ears are located slightly lower than the eyes, the pair of ear hooks 4L and 4R are deployed diagonally downward, allowing the user to wear the heating tool 1 on the user's face without feeling uncomfortable.

As shown in FIGS. 1(B) and 3, openings 40 are formed in the pair of ear hooks 4L and 4R. The opening 40 is a portion into which the user's ears are placed when the pair of ear hooks 4L and 4R are hung on the user's ears. The opening 40 is formed to be horizontally long, so that the ear can be easily inserted into the opening 40. Further, the opening 40 has a vertical width (in a direction perpendicular to the longitudinal direction) from the proximal end to the distal end, that is, in the direction away from the main body 2 and toward the ear when the heating tool 1 is worn. It is formed so that the length) gradually widens. Thereby, the ear can be easily inserted into the opening 40, and the fit of the pair of ear hooks 4L and 4R to the ear can be improved. Note that the shape and size of the opening 40 are not particularly limited as long as the ear can be inserted into the opening 40.

Next, a method of using the above-mentioned heating tool 1 will be explained. Since the heating material 3 generates heat in the presence of air, the heating tool 1 needs to be prevented from coming into contact with air before use, and is stored in an airtight packaging bag (not shown) that does not allow air to pass through. There is. In use, the packaging bag is opened and the heating tool 1 is taken out. Then, the user unfolds the pair of ear hooks 4L and 4R from the closed state, and holds the main body 2 so that the second joint parts 29L and 29R (eye covering parts) of the main body 2 are in contact with the user's left and right eyes. , and hang it on the ear while pulling the pair of ear hooks 4L and 4R outward. Thereby, the heat emitted from the heat generating material 3 provides warmth to the left and right eyes and the surroundings of each eye.

According to the heating tool 1 of the present embodiment, when worn on the face, the lateral center of the lower edge 21 of the main body 2 is concavely curved and constricted. It is easily folded in two along the vertical center line 24 and deformed to fit the shape of the face. Therefore, the main body portion 2 fits closely to the user's face with good fit.

In addition, according to the heating tool 1 of the present embodiment, the pair of ear hook parts 4L and 4R have a substantially L-shape in which the joint part 5 with the main body part 2 protrudes more inward on the lower end side than the upper end side. There is. Therefore, as shown in FIG. 6, when the pair of ear hooks 4L and 4R are pulled laterally outward with respect to the main body 2 in order to hang them on the ears, the lower sides of the left and right ends of the main body 2 are The area (around the left and right corners 25 and 26 on the lower side of the main body 2) is strongly pulled, and the main body 2 is curved in the vertical direction so that it bends toward the user's face (towards the user's face in FIG. 6). transform. The left and right corners 25 and 26 on the lower side of the main body part 2 touch the cheekbones under the eyes when the heating tool 1 is attached to the face, but even if the cheekbones are protruding, they can be bent to follow the surface shape of the cheekbones. It covers the cheekbones and fits the face without lifting up from the face. Therefore, the main body part 2 can be brought into close contact with the user's face with better fit, and the heat generated from the heat generating material 3 can be prevented from escaping to the outside.

In addition, according to the heating tool 1 of the present embodiment, each eye covering part 8L, 8R of the main body part 2 has a lower filling rate of the heat generating material 3 than the surrounding covering part 9, and preferably does not contain the heat generating material 3. Therefore, the heat generated by the heat generating material 3 is weak or no heat is generated. Further, each eye covering portion 8L, 8R of the main body portion 2 is separated from the surrounding covering portion 9, and conduction of heat from the surrounding covering portion 9 to each eye covering portion 8L, 8R is suppressed. Therefore, the temperature in each eye covering portion 8L, 8R of the main body portion 2 is suppressed from increasing. Therefore, when the heating tool 1 is attached to the face, the left and right eyes (eyeballs) can be heated to an appropriate temperature without being heated too high.

In addition, according to the heating tool 1 of the present embodiment, the main body part 2 is divided into the respective eye covering parts 8L and 8R with a low filling rate of the heat generating material 3 inside the surrounding covering part 9, so that the main body part It is possible to lower the maximum temperature of the main body part 2 and suppress a local high temperature rise of the main body part 2. Furthermore, the area of the high temperature region including the lowered maximum temperature can be increased to improve the uniformity of temperature distribution. Therefore, when the heating tool 1 is attached to the face, the area around the left and right eyes can be warmed widely and uniformly to an appropriate temperature.

In addition, according to the heating tool 1 of the present embodiment, the left and right eyes are covered by the eye covering parts 8L and 8R of the main body 2 when worn on the face, so it can be used as an eye mask while sleeping. Not only can it be effective, but since the left and right eyes are not exposed to the outside air when worn on the face, there is less discomfort. Furthermore, when the heating tool 1 is attached to the face, the heat generated from the heat generating material 3 of the surrounding covering part 9 of the main body part 2 can be suppressed from escaping to the outside air, so that heat can be effectively applied to the area around the left and right eyes. be able to.

In addition, according to the heating tool 1 of the present embodiment, the heat-generating material 3 generates heat upon contact with air. Compared to the heating device used previously, it is easier to use and can maintain heat generation for a longer period of time. As described above, since the heating tool 1 of this embodiment uses the heat generating material 3 that generates heat upon contact with air, it provides a heating effect to the eyes (eyeballs) for a long period of time. However, since it does not heat the eyes (eyeballs) at too high a temperature and instead warms them at an appropriate temperature, even if the thermal effect is applied to the eyes (eyeballs) for a long time, the negative effects on the eyes (eyeballs) are suppressed. can do.

In addition, since the heating tool 1 of this embodiment includes the pair of ear hooks 4L and 4R, it is possible to prevent the main body 2 from shifting from the attachment site on the face when it is worn on the face. This allows the main body part 2 to fit securely to the attachment part of the user's face even when the user is standing, sitting, or sleeping. Therefore, it is possible to efficiently provide a thermal effect to the left and right eyes and the surroundings of each eye. For example, in a heating device using adzuki beans or the like as a heat generating material, since the weight of the adzuki beans is heavy, the weight of the adzuki beans allows the main body to fit securely to the attachment area on the face. The heat-generating material 3 whose main component is iron powder is light, and the weight of the heat-generating material 3 does not allow the main body 2 to fit securely to the attachment site on the face. Therefore, by providing the pair of ear hooks 4L and 4R, even if the user moves, the main body part 2 will not shift from the mounting area on the face, and especially if the user wears it while sleeping, the user may turn over in bed. Also, the main body part 2 can be securely fitted to the face without coming off.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention.

As a modified example, in the above embodiment, each joint 5 has a substantially L-shape in which the lower end side protrudes inwardly than the upper end side, but the shape is not limited to this. As long as the hanging parts 4L and 4R can be joined to the main body part 2, various shapes can be formed. Furthermore, the pair of ear hooks 4L and 4R do not necessarily need to be unfolded in a form that extends diagonally downward with respect to the lateral direction of the main body part 2 in the unfolded state, but in a form that extends parallel to the lateral direction of the main body part 2. May be expanded.

As another modification, in the above embodiment, as shown in FIGS. 3, 5, and 7(A), the pair of ear hooks 4L, 4R can be folded back and unfolded at each joint 5. As shown in FIG. 7(B), the pair of ear hooks 4L and 4R are expanded in the lateral direction of the main body 2 in a normal state, and the ends are attached to the main body. It may be joined to the left and right ends of section 2.

As another modification, in the above embodiment, as shown in FIG. May be connected by

As another modification, in the above embodiment, as shown in FIG. 1, the accommodation area for accommodating the heat generating material 3 in the main body part 2 is connected between the left and right eye covering parts 29L and 29R, but as shown in FIG. As shown in the figure, a third joint 30 may be provided between the left and right eye covering parts 29L and 29R, extending parallel to the vertical direction of the main body 2 along the vertical center line 24. Similar to the first joint 28 and the second joint 29L, 29R, the third joint 30 is made by thermally welding (heat sealing) the two sheet materials 27A, 27B constituting the main body 2, using a known adhesive. This is a portion joined by known means such as crimping using a compressor, ultrasonic welding, or a combination thereof.

As another modification, in the above embodiment, the heating tool 1 includes the pair of ear hooks 4L, 4R, but does not necessarily need to include the pair of ear hooks 4L, 4R.

The present invention will be explained below with reference to Examples. However, the present invention is not limited to the following examples.

As an example, a heating tool was manufactured in which each eye covering part of the main body was heat-sealed to separate it from the surrounding covering part, and in which no heat-generating material was housed in each eye covering part. As Comparative Example 1, a heating tool was manufactured in which two sheets of sheet material were not joined at each eye covering part of the main body part, but each eye covering part was connected to the surrounding covering part, and a heat generating material was housed in each eye covering part. did. As Comparative Example 2, a heating tool was manufactured in which each eye covering portion of the main body portion was made into a through hole. As shown in FIG. 1(A), the heating device of each example had a main body that was flat and horizontally elongated in plan view, and had a horizontal width of 205 mm and a vertical width of 110 mm. Each eye covering portion was formed into a horizontally elongated substantially elliptical shape in plan view, and each eye covering portion had a horizontal width of 30 mm and a vertical width of 15 mm. The width of the first joint was 30 mm at the widest point and 7 mm at the narrowest point. In Examples and Comparative Examples 1 and 2, the same heat-generating material and the same material for the main body were used. The main body was formed from two sheet materials in which a polyethylene terephthalate nonwoven fabric and a polyethylene terephthalate resin film were laminated. The heat-generating material contains 55% iron powder, 11% activated carbon, 2% vermiculite, 3% water-absorbing resin, 1.5% salt, and 27.5% water, and in all cases, 20g of heat-generating material is housed in the main body. did.

FIG. 9 shows the results of comparing the temperature distributions of Examples and Comparative Examples 1 and 2 by photographing the temperature of the main body when it generates heat using a thermography in a room at a temperature of 20°C. In addition, the maximum temperature and average temperature of the main body were calculated for the example and each comparative example 1 and 2. In addition, regarding Example and Comparative Example 2, the maximum temperature and the average temperature are the temperatures in the surrounding covering part of the main body part excluding each eye covering part. The results are shown in Table 1.

Referring to FIG. 9, in Comparative Example 1, each eye-covering part of the main body is clearly represented in white and dark, and the temperature is quite high, whereas in the example, each eye-covering part of the main body is yellow or It is shown in yellow-green, indicating that the temperature is low. Regarding the peripheral covering of the main body, in Comparative Example 1, the areas near each eye covering are clearly marked in white, and the areas far from each eye covering are shown in red, showing localized areas. In contrast, in the example, the temperature is almost uniformly displayed in red, and it can be seen that the temperature is uniformly distributed without any local temperature rise. Referring to Table 1, it can be seen that both the maximum temperature and the average temperature are higher in Comparative Example 1 than in the Examples. In this way, it can be confirmed that in the example, compared to Comparative Example 1, each eye covering part of the main body part can be kept at a moderate temperature without becoming high temperature. Furthermore, in the example, compared to Comparative Example 1, the maximum temperature of the main body can be lowered to suppress a local high temperature rise, and the area of the high temperature region including the lowered maximum temperature is increased. It can be confirmed that the uniformity of temperature distribution can be improved.

On the other hand, referring to FIG. 9, in Comparative Example 2, each eye covering portion of the main body portion is shown in green, and it can be seen that the temperature is lower than in the Example. Regarding the surrounding covering of the main body, although Comparative Example 2 was able to lower the maximum temperature of the main body and suppress a local high temperature rise as in the example, the overall temperature was lower than in the example. It can be seen that the temperature distribution is low and the uniformity of temperature distribution is also poor. Referring to Table 1, it can be seen that both the maximum temperature and the average temperature are lower in Comparative Example 2 than in the Example, and furthermore, the temperature difference between the eye covering part and the surrounding covering part is also smaller in the Example. As described above, in the example, compared to Comparative Example 2, the temperature of each eye covering part of the main body can be increased to appropriately warm the left and right eyes, and the temperature of each eye covering part and the surrounding covering part can be increased. It can be confirmed that the discomfort during wearing can be reduced by reducing the temperature difference. Furthermore, in the example, the maximum temperature is higher in the surrounding covering part of the main body than in Comparative Example 2, and the area of the high temperature region including the maximum temperature is spread evenly, so it is effective for the areas around the left and right eyes. It can be confirmed that heat can be given to

As a reference example, instead of the heat-generating material that generates heat upon contact with air used in the above-mentioned examples, the main body contains a thermal material that generates heat when exposed to microwaves in a microwave oven, etc. The tool was manufactured, and the temperature of the main body part when it generated heat was photographed using thermography in a room at a temperature of 20°C. Reference example 1 is a heating tool in which adzuki bean is not housed in each eye covering part of the main body part, and reference example 2 is a heating tool in which each eye covering part of the main body part is continuous with the surrounding covering part, so that each eye covering part generates heat. It is a heating device that contains materials. FIG. 10 shows the results of comparing the temperature distributions of Reference Examples 1 and 2.

Referring to FIG. 10, in Reference Example 1, unlike in Comparative Example 1, it was not confirmed that the temperature locally increased in the surrounding covering part around each eye covering part of the main body. In addition, in Reference Example 2, as in the example, it could not be confirmed that the area of the high temperature region increases in the surrounding covering part around each eye covering part of the main body part, and the uniformity of the temperature distribution is improved. .

Based on Reference Examples 1 and 2, unlike the heating tool using the exothermic material of the present invention, the heating tool using azuki beans heats the moisture in the adzuki beans by being irradiated with microwaves in a microwave oven, etc. This generates heat, so the temperature distribution of the main body depends on the unevenness of the azuki beans within the main body.If the azuki beans are evenly housed in the main body, the temperature distribution will be uniform, and the temperature will rise locally. There isn't. On the other hand, even if the heat-generating material that generates heat upon contact with air is housed uniformly in the main body, the temperature locally increases in the surrounding coating of the main body as in Comparative Example 1. As described above, the problem of localized temperature rise in the surrounding coating of the main body, which causes uneven temperature distribution in the main body, can be solved by using a heat-generating material that generates heat upon contact with air, as in the present invention. This problem is unique to heating tools that use adzuki bean, and has nothing to do with heating tools that use adzuki bean. The effect of suppressing the local temperature rise in the main body and increasing the area of the high temperature region to improve the uniformity of temperature distribution is a unique effect that cannot be predicted from a heating tool using adzuki bean. It is.

1 Heating tool 2 Body part 3 Heat generating material 4L Ear hook part 4R Ear hook part 5 Joint part 8L Eye covering part 8R Eye covering part 9 Surrounding covering part

Claims (2)

An eye mask type heating device that is used by being attached to the user's face,
Comprising a heat-generating material that generates heat upon contact with air, and a main body that accommodates the heat-generating material and covers the left and right eyes and the surroundings of each eye when worn,
The main body part is divided into an eye covering part, which is a part that comes into contact with the eye when worn, and a peripheral covering part, which is a part that comes into contact with the periphery of the eye,
The main body portion is formed into a bag shape by joining a portion along the outer periphery of a sheet material forming the front surface and a sheet material forming the back surface,
The eye covering part is separated from the surrounding covering part by joining a part of the sheet material to each other, and the heat generating material is not housed in the heating tool. The heating tool according to claim 1 , further comprising a pair of ear hooks that are hung over the ears when worn.

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