heating equipment

Abstract

To provide a hyperthermic tool capable of acquiring a massage effect by compression to a cheek, in addition to a hyperthermic effect.SOLUTION: A hyperthermic tool comprises: a mask body which has a length in a vertical direction and a lateral direction capable of covering at least the cheeks and the lower part of the jaw of a wearer; a heat generation body which is provided in the mask body; and ear hook parts each of which is provided on one / the other of both sides of the mask body in the lateral direction, and holds the mask body to the face of the wearer so that at least cheeks and the lower part of the jaw of the wearer are covered with the mask body. The mask body has a slit extending in the lateral direction, between a center of the mask body in the lateral direction and each side part, the heat generation body is provided closer to a lower side of the jaw relative to the slit, and a lower end part on a connection part of the ear hook part to the mask body in the vertical direction is closer to the lower side of the jaw relative to the slit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Various face masks that cover the entire face have been proposed for beauty purposes such as relieving skin problems or for the purpose of achieving a relaxing effect. For example, Patent Documents 1 and 2 disclose face masks that include a mask main body with a face contact portion large enough to cover the entire face, and ear loops attached to the left and right lateral sides of the mask main body in two parallel rows, and that have a heat-generating function at the face contact portion of the mask main body. The face masks in Patent Documents 1 and 2 warm the wearer's face with the heat-generating function of the face contact portion, thereby achieving effects such as promoting blood flow. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-97426 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-259654 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, facial massages have been performed to relieve facial stiffness for beauty and relaxation purposes. However, while the face masks of Patent Documents 1 and 2 can improve the fit of the mask body to the wearer's face by using ear loops attached in pairs along the top and bottom of the mask body, they are not designed to apply pressure to the cheeks. Therefore, the face masks of Patent Documents 1 and 2 leave room for improvement in terms of providing a massaging effect.

[0005] The present invention relates to a heating device that can provide a massage effect by compression in addition to a thermal effect. [Means for solving the problem]

[0006] The present invention relates to a heating device comprising a mask body having vertical and horizontal lengths sufficient to cover at least the cheeks and under the chin of the wearer, a heating element provided on the mask body, and ear loops provided on both horizontal sides of the mask body to hold the mask body in front of the wearer's face so that at least the cheeks and under the chin of the wearer are covered by the mask body, the mask body has slits extending horizontally between the horizontal center and each side of the mask body, the heating element is located at least in an area below the chin with respect to the slits, and the lower vertical end of the ear loop at the connection part with the mask body is located below the chin with respect to the slits. [Effects of the Invention]

[0007] The heating device according to the present invention can provide a massage effect by compression in addition to a heating effect. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing a heating device according to one embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a diagram showing the folded state of the heating implement according to the present embodiment. [Figure 3] FIG. 10 is a diagram showing the state in which the open end of the heating implement according to this embodiment is expanded. [Figure 4] FIG. 10 is a diagram showing the ear hook portion folded in. [Figure 5] FIG. 2 is a diagram schematically illustrating a cross section of a heating element. [Figure 6] FIG. 1 is a schematic diagram showing an apparatus for measuring the amount of generated water vapor. [Figure 7] FIG. 2 is a diagram showing the positional relationship of heating elements. [Figure 8] 1A to 1C are diagrams showing the process of putting the heating device on a wearer. [Figure 9] FIG. 1 is a diagram showing the state in which the heating device is attached to a wearer. [Figure 10] FIG. 10 is a diagram showing a heating implement according to a first modified example. [Figure 11] FIG. 10 is a diagram showing a heating implement according to a second modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention. The drawings are schematic diagrams in which emphasis, omission, and proportion adjustments have been made as appropriate to illustrate the present invention, and may differ from the actual shapes, positional relationships, and proportions.

[0010] [Overall composition of the heating tool] The heating device 1 of this embodiment is a face mask type heating device that can cover at least the cheeks and under the chin of the wearer, and as shown in Figure 1, it comprises a mask body 2 that has a length in the vertical and horizontal directions that is sufficient to cover at least the cheeks and under the chin of the wearer, a heating element 20 provided on the mask body 2, and ear loops 30 that are provided on both sides of the mask body 2 in the horizontal direction and that hold the mask body 2 in front of the wearer's face so that the mask body 2 covers at least the cheeks and under the chin of the wearer.

[0011] [Term definition] In this specification, "covering at least the cheeks" means covering at least the area from the lower end of the lower eyelid (lower eyelid) to the lower lip in the vertical direction of the mask body 2, and covering at least the area between the left and right cheeks in the horizontal direction. Furthermore, "covering at least the cheeks" conceptually also includes "covering the entire face," which means covering at least the area from the upper eyelid to the tip of the chin in the vertical direction, and covering at least the area between the left and right cheeks in the horizontal direction. Furthermore, "covering the underside of the chin" means covering at least the area from the tip of the chin to the neck, more preferably the larynx, in the vertical direction of the mask body 2, and covering at least the area between the left and right mandibular angles in the horizontal direction. The "mandibular angle" refers to the angle at the posterior edge of the mandible, and more specifically, the corner transitioning from the lower edge of the mandible to the posterior edge of the ramus of the mandible. Furthermore, "covering" means that the inner surface of the mask body 2 is positioned on a predetermined area of ​​the wearer's face and under the chin, and is not limited to a state in which the inner surface of the mask body 2 comes into full contact with the wearer's face and under the chin, but also includes a state in which the inner surface of the mask body 2 comes into local contact with the wearer's face and under the chin.

[0012] In this specification, the edge on the side where the first panel portion 10A and the second panel portion 10B (described later) are joined together is referred to as the "closed side edge 6," and the edge portions excluding the closed side edge 6, i.e., the edge portions of the first panel portion 10A and the second panel portion 10B that are not joined together, are referred to as the "open side edge 5." In this embodiment, the first panel portion 10A and the second panel portion 10B have bilaterally symmetrical shapes with the closed side edge 6 as the boundary, and therefore the closed side edge 6 is located at the center of the mask body 2 in the horizontal direction. In other words, the closed side edge 6 forms an "upper and lower center line" that horizontally divides the mask body 2 in half.

[0013] In addition, in this specification, when the mask body 2 is folded in half along the vertical center line (the closed side end 6) and viewed from a planar direction (i.e., the state shown in FIG. 2), the upper side in the vertical direction is referred to as the "eye side," and the lower side in the vertical direction in this state is referred to as the "underchin side." Here, the "eye side" refers to the side that is located on the eye side when worn, and the "underchin side" refers to the side that is located under the chin in this state. Furthermore, in this specification, the vertical direction when the mask body 2 is worn on the wearer's face is the direction along the body axis, and the width direction of the wearer's face in this state is referred to as the "lateral direction."

[0014] [Mask body configuration] As shown in Fig. 1, the mask body 2 includes a first panel portion 10A that forms one half of the periphery of the mask body 2, and a second panel portion 10B that forms the remaining half of the periphery. The first panel portion 10A and the second panel portion 10B are each made of a sheet-like member of the same shape and size, and as shown in Fig. 2, one lateral edge of the first panel portion 10A and one lateral edge of the second panel portion 10B are joined to each other except for breathing holes 8, which will be described later. This allows the open end portion 5 of the first panel portion 10A and the open end portion 5 of the second panel portion 10B to expand in directions away from each other, thereby deforming the mask body 2 into a boat shape.

[0015] In this specification, the shape of the mask body 2 in a three-dimensionally deformed state is referred to as a "three-dimensional shape," and the folded state before deformation (i.e., the state in which the first panel portion 10A and the second panel portion 10B are overlapped with each other (see FIG. 2)) is referred to as a "folded shape." The term "boat-shaped" refers to a shape in which the expanded open-side end portions 5 of the first panel portion 10A and the second panel portion 10B form an annular opening, and the first panel portion 10A and the second panel portion 10B form a circumferential surface that converges from the expanded annular open-side end portion 5 toward the closed-side end portion 6. In this case, "annular" includes not only a circular shape but also a polygonal shape, and also includes a vertically or horizontally elongated shape with a longitudinal direction in the vertical or horizontal direction. Furthermore, the closed-side end portion 6 is not limited to a linear configuration, and may have a flat bottom.

[0016] The means for joining the first panel portion 10A and the second panel portion 10B is not particularly limited as long as it can join the two panel portions 10A, 10B so that they do not separate. Any means, such as crimping, heat welding, ultrasonic welding, high-frequency welding, or adhesives, can be used. In the illustrated example, the joining portions are configured to form a striped pattern in the forming area (stripe pattern), but this is not limited thereto. Various configurations, such as a configuration in which the entire forming area is crimped (continuous seal), can also be used. Instead of mechanically joining the first panel portion 10A and the second panel portion 10B formed separately, the first panel portion 10A and the second panel portion 10B may be formed integrally from the beginning.

[0017] As shown in FIG. 3 , the first panel portion 10A and the second panel portion 10B are configured to be deformable into a three-dimensional shape by expanding the openings of the open-side end portions 5. That is, by expanding the openings of the open-side end portions 5, the first panel portion 10A and the second panel portion 10B are configured to bend into a circular curved surface that convexly extends away from each other, and to deform into a shape with the closed-side end portion 6 as the bottom and the open-side end portion 5 as the opening edge. By deforming the first panel portion 10A and the second panel portion 10B in this manner, the mask body 2 assumes a boat-like shape with the expanded open-side end portion 5 facing toward the face and the closed-side end portion 6 facing away from the face, i.e., a sideways opening. When the mask body 2 is retained in a three-dimensional shape, the mask body 2 has a vertical centerline extending perpendicular to the horizontal direction at its horizontal center. One horizontal side of the vertical centerline constitutes the first panel portion 10A, and the other horizontal side constitutes the second panel portion 10B. That is, the first panel portion 10A forms half of the circumferential surface (either the left or right half of the circumferential surface) from the open side end 5 to the closed side end 6, and the second panel portion 10B forms the remaining half of the circumferential surface (the remaining half of the circumferential surface) from the open side end 5 to the closed side end 6.

[0018] As shown in Fig. 3, the open end 5 of the mask body 2 is configured to form an opening large enough to cover at least the cheeks and under the chin of the wearer when the mask body 2 is maintained in a three-dimensional shape. Specifically, the perimeter of the opening at the open end 5 of the mask body 2 is preferably 400 mm or more, more preferably 500 mm or more, even more preferably 600 mm or more, and even more preferably 650 mm or more, from the viewpoint of covering at least the cheeks and under the chin of the wearer. Furthermore, the perimeter of the opening at the open end 5 of the mask body 2 is preferably 900 mm or less, more preferably 800 mm or less, even more preferably 750 mm or less, and even more preferably 700 mm or less, from the viewpoint of minimizing the gap with the wearer's face and preventing steam leakage. Here, "perimeter of the opening at the open side end 5" means the total length of the opening edge at the open side end 5, and in this embodiment, it means the total value of the length of the eye side edge 5a, under-chin edge 5b and ear hook joint 5c described below at the open side end 5 of the first panel portion 10A, and the length of the eye side edge 5a, under-chin edge 5b and ear hook joint 5c described below at the open side end 5 of the second panel portion 10B. The mask body 2 according to this embodiment is not limited to a configuration in which the opening portion is open before use, but may be configured so that it can be opened when in use. Specifically, the mask body 2 may have no opening when in use, but may have perforations at the edge of the opening so that it can be opened when in use.

[0019] Furthermore, the mask body 2 preferably has a vertical length that allows the apex of the open side end 5 on the eye side (intersection point IPt, which will be described later) to be positioned at least at the tip of the nose, preferably at the base of the nose, and the apex of the open side end 5 on the underchin side (intersection point IPb, which will be described later) to be positioned at the neck, preferably at the larynx. From this perspective, as shown in Figure 2, in a plan view of the mask body 2 folded about the vertical center line (closed side end 6), the length L of an imaginary line VL linearly connecting the vertical upper end and the vertical lower end of the vertical center line is preferably 110 mm or more, more preferably 130 mm or more, even more preferably 150 mm or more, and even more preferably 170 mm or more. Furthermore, it is preferable that the length L of this imaginary line VL be set within the size of the wearer's face so that there is no large gap between the face and the heating device when worn. From this viewpoint, the length L of the imaginary line VL is preferably 250 mm or less, more preferably 230 mm or less, even more preferably 210 mm or less, and even more preferably 190 mm or less.

[0020] Here, the "upper end of the vertical center line" refers to the intersection IPt between a later-described eye-side edge 5a of the open-side end 5 and the eye-side end (upper end) of the closed-side end 6, and the "lower end of the vertical center line" refers to the intersection IPb between a later-described underchin-side edge 5b of the open-side end 5 and the underchin-side end (lower end) of the closed-side end 6. Note that if it is difficult to clearly identify the intersection IPt and IPb, such as when the eye-side end (upper end) of the closed-side end 6 and / or the underchin-side end (lower end) of the closed-side end 6 are arc-shaped, the intersection IPt and IPb may be determined to be the portion where the open-side end 5 and the closed-side end 6 intersect, where the radius of curvature is smallest. Furthermore, as shown in FIG. 2, if the closed-side end 6 has a joint (sealed portion), the "length L of the imaginary line VL" refers to the dimension including the joint (sealed portion) (i.e., the outer dimension).

[0021] Furthermore, the mask body 2 preferably has a depth length that allows the ear-hook joint 5c (described later) of the open-side end 5 of the first panel portion 10A to be positioned closer to one ear than one cheek and the angle of the mandible, and the ear-hook joint 5c (described later) of the open-side end 5 of the second panel portion 10B to be positioned closer to the other ear than the other cheek and the angle of the mandible. From this perspective, as shown in FIG. 2 , the mask body 2 has a depth PD from the open-side end 5 to the closed-side end 6, as viewed in a plan view in a state where the mask body 2 is folded about the vertical centerline (closed-side end 6), of preferably 70 mm or more, more preferably 80 mm or more, even more preferably 90 mm or more, and even more preferably 100 mm or more. Furthermore, it is preferable that this depth PD be set within the range of the wearer's face size so as not to create a large gap between the face and the heating device when worn. From this perspective, the depth PD is preferably 140 mm or less, more preferably 130 mm or less, even more preferably 120 mm or less, and even more preferably 110 mm or less. Here, "depth PD" refers to the depth at the deepest part of the mask body 2, and in this embodiment refers to the linear distance extending horizontally (horizontally perpendicular to the up-down direction) from the most expanded point (expansion point) Pmax of the closed side end 6 of the folded mask body 2 to the open side end 5.

[0022] As shown in Fig. 2, the first panel portion 10A and the second panel portion 10B are each formed in a shape that tapers from the open-side end 5 to the closed-side end 6, or in a roughly fan-like shape in this embodiment. Specifically, as shown in Fig. 2, each open-side end 5 of the first panel portion 10A and the second panel portion 10B has an ear-hook joint 5c to which the ear hook portion 30 is joined, an eye-side edge 5a extending from the eye-side end (upper end) of the ear-hook joint 5c to the eye-side end (upper end) of the closed-side end 6, and an underchin-side edge 5b extending from the underchin-side end (lower end) 5cb of the ear-hook joint 5c to the underchin-side end (lower end) of the closed-side end 6. The closed-side end 6 is formed in an arc shape that convex in the direction away from the ear-hook joint 5c.

[0023] The shapes of the eye-side edge 5a, the underchin-side edge 5b, and the ear-hook joint 5c are appropriately adjusted to fit the wearer's face (particularly the nose, cheeks, chin, and under the chin), and various shapes can be adopted, such as a straight line, an arc, or a shape with a locally convex or curved portion. For example, in this embodiment, the ear-hook joint 5c is formed in a straight line extending in the vertical direction, and the underchin-side edge 5b is formed in a straight line extending in the horizontal direction. Furthermore, the eye-side edge 5a is formed in a straight line extending in the horizontal direction from the eye-side end of the ear-hook joint 5c and then curved in an arc upward in the vertical direction. Furthermore, the closed-side end 6 is not limited to an arc shape, and various shapes can be adopted that are any combination of straight lines, bent lines, and arcs.

[0024] [Configuration of the ventilation hole] As shown in FIG. 2, the mask body 2 has breathing holes 8 in the area corresponding to the wearer's nose and mouth. The breathing holes 8 are openings formed in the area of ​​the mask body 2 corresponding to the wearer's nose and mouth, and are large enough to expose the nose and mouth. The breathing holes 8 are not limited to openings, and any other configuration may be adopted, such as cutouts formed in the area corresponding to the wearer's nose and mouth. Furthermore, the breathing holes 8 are not limited to a configuration that exposes both the wearer's nose and mouth, and may be a configuration that exposes only the wearer's nose, or a configuration that exposes only the wearer's mouth.

[0025] [Slit configuration] 2, the mask body 2 has slits 7 between the horizontal center (vertical centerline) and each side (each ear-hook joint 5c) of the mask body 2. That is, the slits 7 are formed in both the first panel portion 10A and the second panel portion 10B.

[0026] As shown in Fig. 2, the slits 7 extend horizontally in a plan view when the mask body 2 is folded along the vertical centerline. Here, "extending horizontally" means that, when the slits 7 are regarded as two-dimensional vectors having "direction" and "magnitude," and the "direction" and "magnitude" of the slits 7 are expressed as vector components (x, y), the horizontal component of the slits 7 along the horizontal direction of the mask body 2 (the amount of movement in the x direction) is greater than the vertical component of the slits 7 along the vertical direction of the mask body 2 (the amount of movement in the y direction). Note that, if the slits 7 have a shape other than a straight line, such as a curved shape such as a wave, the extension direction of the slits 7 may be considered to be an imaginary straight line connecting the end of the slits 7 on the closed end 6 side and the end 7a on the open end 5 (ear hook joint 5c) side. The slit 7 may be one or more continuous lines. Alternatively, the slits 7 may be intermittently connected by perforations before use, and become a continuous line when in use.

[0027] Specifically, the angle θ between the slit 7 and an imaginary line VL linearly connecting the upper and lower ends of the vertical center line is preferably 80° or greater, more preferably 85° or greater, and even more preferably 90° or greater, from the viewpoint of preventing a large gap between the chin and the heating device when worn, and of allowing the upper heating elements 201A, 201B and the lower heating elements 202A, 202B to overlap when worn, increasing pressure on the wearer's cheeks and providing a massage stimulus, as shown in Figure 2. Furthermore, the angle θ is preferably 120° or less, more preferably 110° or less, and even more preferably 100° or less, from the viewpoint of preventing a large gap between the nose and the heating element 1 when worn, and of preventing excessive pressure on the face, including the chin and cheeks, when worn. If the slit 7 has a shape other than a straight line, the extension direction may be specified as described above, and the angle θ may be specified based on that extension direction.

[0028] The angle of the slit 7 can also be determined based on the horizontal line (the horizontal line in a plan view when the mask body 2 is folded about the vertical center line) rather than the virtual line VL. Specifically, when viewed in a plan view when the mask body 2 is folded about the vertical center line and the underchin edge 5b is positioned so as to be parallel to the horizontal line (the state in FIG. 2), the angle θ' (not shown) of the slit 7 with respect to the horizontal line is preferably −20° or more, more preferably −15° or more, and even more preferably −10° or more, from the viewpoints of not creating a large gap between the chin and the heating device when worn and allowing the upper heating elements 201A, 201B and the lower heating elements 202A, 202B to overlap when worn, increasing the pressure on the wearer's cheeks and providing a massage stimulus. Furthermore, the angle θ' is preferably 20° or less, more preferably 15° or less, and even more preferably 10° or less, from the viewpoint of preventing a large gap between the nose and the heating device 1 when worn and preventing excessive pressure on the face, including the chin and cheeks, when worn. From the viewpoint of achieving both an appropriate massage stimulus to the cheeks and comfort when worn, θ' is optimally 0°.

[0029] 2, in a plan view with the mask body 2 folded along the top and bottom center line, the slit 7 has a length SL that is preferably 20% or more, more preferably 30% or more, and even more preferably 35% or more of the length L of the imaginary line VL, from the viewpoints of allowing the upper heating elements 201A, 201B and the lower heating elements 202A, 202B to overlap without leaving a large gap when worn and reducing lift at the end of the closed end 6 of the slit 7. Furthermore, the length SL of the slit 7 in the extension direction (see FIG. 2) is preferably 80% or less, more preferably 50% or less, and even more preferably 40% or less of the length L of the imaginary line VL, from the viewpoints of exerting pressure on the cheeks and providing a massaging effect.

[0030] From this perspective, the length SL of the slit 7 in the extension direction (see FIG. 2) is preferably 40 mm or more, more preferably 50 mm or more, and even more preferably 60 mm or more, and is preferably 90 mm or less, more preferably 80 mm or less, and even more preferably 70 mm or less. If the slit 7 has a shape other than a straight line, the length SL of the slit 7 may be considered to be the length of a virtual straight line connecting the end of the slit 7 on the closed end 6 side and the end 7a on the open end 5 (ear hook joint portion 5c) side.

[0031] In this embodiment, the slit 7 is arranged to be contained within the region between the vertical center line (closed side end 6) and the open side end 5 of the mask body 2. That is, the end 7a of the slit 7 on the open side end 5 side does not reach the open side end 5, and the end on the vertical center line side does not reach the closed side end 6 or the breathing hole 8. However, this is not limited thereto, and the end 7a of the slit 7 on the open side end 5 side may reach the open side end 5 (the open side end 5 side may be left uncut).

[0032] As shown in Figures 2 and 3, the slits 7 are formed in each panel 10A, 10B between the upper heating elements 201A, 201B and the lower heating elements 202A, 202B. When viewed from above with the mask body 2 folded along the vertical centerline, the slits 7 are formed at approximately the same vertical height as the boundary between the upper ear loops 301A, 301B and the lower ear loops 302A, 302B, as shown in Figure 2. More preferably, the slits 7 are formed so that they are positioned slightly lower than the bases of the wearer's lower ears (i.e., the bases of the earlobes) when the upper ear loops 301A, 301B are attached to the wearer's ears.

[0033] From the viewpoint of efficiently absorbing distortion of the mask body 2 when worn, it is preferable that the slits 7 penetrate both the outer sheet 16 and the inner sheet 14 described below, but this is not limited thereto, and the slits 7 may be configured to penetrate only the outer sheet 16 or only the inner sheet 14.

[0034] [Seat configuration of the first and second panel sections] The first panel portion 10A and the second panel portion 10B are sheet-like, and more specifically, each is formed from a single sheet. The single sheet forming the first panel portion 10A and the second panel portion 10B may have a single structure (single-layer structure) or an integrated multi-layer structure in which multiple sheets are laminated. The sheet-like members forming the first panel portion 10A and the second panel portion 10B are preferably multi-layered because various functions can be imparted to the mask main body 2 by imparting different functions to the multiple sheets. When multiple sheets are used, the sheets may be embossed or laminated, or may be bonded entirely or spaced apart. Furthermore, when the sheets are spaced apart, the sheets may be bonded together by sealing the edges of the sheets to fit the shape of the mask main body 2, or by simply joining a portion of the edge with a point seal.

[0035] In the following description of this embodiment, the first panel portion 10A and the second panel portion 10B are described as being formed from a single sheet having a multilayer structure. Specifically, as shown in FIG. 1 , the first panel portion 10A and the second panel portion 10B each include an inner sheet 14 that forms the inner surface when the panel portion 10A and the second panel portion 10B are formed into a three-dimensional shape, and an outer sheet 16 that forms the outer surface when the panel portion 10A and the second panel portion 10B are formed into a three-dimensional shape. The inner sheet 14 and the outer sheet 16 are formed to have the same shape and size, and are laminated together to form a single sheet having a multilayer structure. As described above, instead of the first panel portion 10A and the second panel portion 10B each being formed from a single sheet and mechanically joined together, the first panel portion 10A and the second panel portion 10B may be formed from an integral single sheet from the beginning.

[0036] In the mask body 2 according to this embodiment, the heating element 20 is disposed between the inner sheet 14 and the outer sheet 16. That is, when both the inner sheet 14 and the outer sheet 16 are made of a single-layer or multi-layer nonwoven fabric as described below, the heating element 20 is sandwiched between two or more sheets of nonwoven fabric. However, this is not limiting, and a pocket-shaped storage section may be provided on the inner surface of the mask body 2, and the heating element 20 may be attached and detached to the storage section, or the heating element 20 may be fixed to the inner surface of the mask body 2 using a fixing means such as an adhesive. Furthermore, the outer sheet 16 and the inner sheet 14 may be locally non-adhered to form an opening and a storage space between them through which the heating element 20 can be inserted and detached.

[0037] An adhesive (not shown) is applied to the outer sheet 16, and the heating element 20 and the inner sheet 14 are bonded via the adhesive. Although a hot-melt adhesive is preferably used as the adhesive, the adhesive is not limited thereto, and various known fixing means can be used. Note that instead of or in addition to applying an adhesive to the outer sheet 16, it is also possible to apply an adhesive to the inner sheet 14.

[0038] The materials for the inner sheet 14 and the outer sheet 16 can be any conventional material used in the field of face masks, and are not particularly limited as long as they have a certain level of breathability. Examples include nonwoven fabrics, woven fabrics, fiber sheets such as paper, resin foam sheets, metal sheets, and combinations thereof. Among these, nonwoven fabrics are preferred for their ease of processing and economic efficiency. The fiber material for the nonwoven fabric is preferably composed of one or more fibers selected from the group consisting of polyesters such as PET (polyethylene terephthalate); polyolefins such as PE (polyethylene), PP (polypropylene), and ethylene-propylene copolymers; rayon; and cotton. Nonwoven fabrics can be manufactured using one or more of the above fibers by methods such as air-through, spunbonding, needle-punching, meltblown, carding, heat fusion, hydroentanglement, and solvent bonding, and may have a single-layer or multilayer structure. The nonwoven fabric may also be chemically treated depending on the purpose.

[0039] The inner sheet 14 is preferably breathable in order to allow the dispersed steam to efficiently reach the wearer's face. The outer sheet 16 may be made of any material depending on the product design, and may be breathable or non-breathable, and may be stretchable or non-stretchable. Examples of stretchable sheets include sheets containing elastic fibers as constituent fibers, sheets containing elastic filaments, and sheets that exhibit stretchability through a structure such as rib knitting.

[0040] The inner sheet 14 and the outer sheet 16 may be any sheet as long as they have flexibility to deform along the contours of the wearer when worn, and have a basis weight that allows them to exhibit rigidity that can stably maintain the shape of the mask body 2 and stably hold the heating element 20. For the inner sheet 14, it is preferable to select a constituent material that aims to improve contact with the skin, and for the outer sheet 16, it is preferable to select a constituent material that is suitable for imparting the above-mentioned rigidity to the mask body 2.

[0041] Specifically, the basis weight of the inner sheet 14 is set to 35 g / m2 from the viewpoint of providing a comfortable feel during use. 2 It is preferable that the weight is 40 g / m or more. 2 More preferably, it is 45 g / m or more. 2 More preferably, it is 50 g / m or more. 2 It is even more preferable that the basis weight of the inner sheet 14 is 85 g / m or more from the viewpoint of efficiently supplying steam to the wearer. 2 Preferably, it is 80 g / m or less. 2 More preferably, it is 75 g / m or less. 2 More preferably, it is 70 g / m or less. 2 Even more preferably, the following:

[0042] The thickness of the inner sheet 14 is preferably at least 200 μm, more preferably at least 400 μm, and even more preferably at least 600 μm, and is preferably no more than 1 mm, more preferably no more than 900 μm, and even more preferably no more than 800 μm.

[0043] The basis weight of the outer sheet 16 is determined from the viewpoint of stably maintaining the shape of the mask body 2 and stably holding the heating element 20. From this viewpoint, it is set to 5 g / m 2 It is preferable that the content is 10 g / m or more. 2 More preferably, it is 15 g / m or more. 2 More preferably, it is 20 g / m or more. 2 It is even more preferable that the basis weight of the outer sheet 16 is 70 g / m2 or more, from the viewpoint of preventing the mask from shifting due to its weight and providing a comfortable fit. 2 Preferably, it is 60 g / m or less. 2 More preferably, it is 50 g / m or less. 2 More preferably, it is 40 g / m or less. 2 Even more preferably, the following:

[0044] From the viewpoint of efficiently applying steam, the air permeability of the inner sheet 14 is preferably 300 sec / 100 mL or less, more preferably 200 sec / 100 mL or less, even more preferably 100 sec / 100 mL or less, even more preferably 5 sec / 100 mL or less, and most preferably 0 sec / 100 mL. As long as such air permeability is satisfied, the inner sheet 14 may be a non-air permeable sheet, with part of it not being air permeable. When an inner sheet 14 with an air permeability of 100 sec / 100 mL or less is used, water vapor from the heating element 20 can be efficiently discharged through the inner sheet 14.

[0045] Here, the air permeability can be measured as follows. The air permeability is a value measured according to JIS P8117 (revised in 2009), and is the value at which 100 ml of air passes through a hole of 6.42 cm under a constant pressure. 2 The air permeability is defined as the time it takes for air to pass through an area of ​​10000 s. Therefore, a large air permeability value means that it takes longer for air to pass through, i.e., the air permeability is low. Conversely, a small air permeability value means that the air permeability is high. Thus, there is an inverse relationship between the air permeability value and the air permeability. Air permeability can be measured using an Oken air permeability meter. In this specification, an air permeability of 30,000 s / 100 ml or more is considered to be "hard to breathe," and an air permeability of 80,000 s / 100 ml or more is considered to be "non-breathable."

[0046] Before use, the mask body 2 having the above configuration is folded flat by folding the first panel portion 10A and the second panel portion 10B in half along the vertical center line (the closed end portion 6). In this state, the ear loops 30 can be folded and stored inside the mask body 2 (see FIG. 4 ), as described below, to make the mask more compact. When in use, the mask body 2 is opened from the edge (the open end portion 5) opposite the vertical center line (the closed end portion 6), and the inside of the folded mask body 2 faces the wearer. That is, when the open end portion 5 of the first panel portion 10A and the open end portion 5 of the second panel portion 10B are pulled apart from each other, the closed end portion 6 protrudes forward of the mask body 2 around the vertical center line, forming a three-dimensional shape. The mask body 2 formed in such a three-dimensional shape has the advantage that the opening of the widened open side end 5 fits closely along the wearer's face, making it less likely for gaps to form between the wearer's face and the mask body 2.

[0047] [Ear hook configuration] The ear loops 30 are provided on both lateral sides of the mask body 2, and hold the mask body 2 in front of the wearer's face so that the mask body 2 covers at least the cheeks and under the chin of the wearer. An example of the ear loops 30 will be described below.

[0048] In this embodiment, the ear hooks 30 are attached to the wearer's ears, and are provided in a total of four, two on each side (left and right ends) of the mask body 2 in the vertical direction. That is, the ear hooks 30 provided at the ear joint 5c of the first panel 10A include an upper ear hook 301A and a lower ear hook 302A located below the chin of the upper ear hook 301A. Similarly, the ear hooks 30 provided at the ear joint 5c of the second panel 10B include an upper ear hook 301B and a lower ear hook 302B located below the chin of the upper ear hook 301B.

[0049] Hereinafter, all of the ear hook portions 30 (upper ear hook portions 301A, 301B and lower ear hook portions 302A, 302B) will be collectively referred to as "ear hook portions 30" or "two sets of ear hook portions 30." The two sets of ear hook portions 30 are defined as two ear hook portions 30 (upper ear hook portion 301A and lower ear hook portion 302A) on the first panel portion 10A side as one set, and two ear hook portions 30 (upper ear hook portion 301B and lower ear hook portion 302B) on the second panel portion 10B side as one set.

[0050] The upper ear hook portion 301A on the first panel portion 10A side and the upper ear hook portion 301B on the second panel portion 10B side are formed to be the same shape and size, and are located symmetrically about the vertical center line (closed side end 6). The lower ear hook portion 302A on the first panel portion 10A side and the lower ear hook portion 302B on the second panel portion 10B side are formed to be the same shape and size, and are located symmetrically about the vertical center line (closed side end 6). Meanwhile, the upper ear hook portions 301A, 301B and the lower ear hook portions 302A, 302B are formed to be different shapes. However, the shapes of the upper ear hook portions 301A, 301B and the lower ear hook portions 302A, 302B can be changed as desired depending on the specific application, and the upper ear hook portions 301A, 301B and the lower ear hook portions 302A, 302B may be formed to be the same shape and size.

[0051] As shown in FIG. 2, each ear loop 30 has an ear loop main body 31, ear loop holes 32 through which the wearer's ears can be inserted, and a seal portion 39 (see FIG. 4) that joins the mask body 2 and the ear loop main body 31.

[0052] The ear loop body 31 has an upper edge, a lower edge, an open edge on the open side of the ear loop 30 that is not joined to the mask body 2, and a joining edge that is joined to the ear loop joining portion 5c at the open end 5 of the mask body 2. In this embodiment, the ear loop body 31 is flat and has a rounded, approximately rectangular shape. Specifically, the upper and lower edges taper from the joining edge toward the open edge, and the open edge is formed in an arc. Note that the shape of the ear loop body 31 is not limited to a rounded, approximately rectangular shape, and various shapes can be used.

[0053] In this embodiment, it is preferable that the length (mm) of each ear loop 30 parallel to the horizontal direction of the mask body 2 is less than half the horizontal length (mm) of the mask body 2, i.e., less than the horizontal length (mm) of each panel portion 10A, 10B. This prevents the ear loops 30 from overlapping with the mask body 2 when the heating device 1 is folded in half along the vertical center line, resulting in an unnatural fold inside the mask body 2, increasing the thickness, and preventing the ear loops 30 from becoming tangled, allowing the heating device 1 to be packed more compactly. Furthermore, when the ear loops 30 are folded inside the mask body 2 as shown in Figure 4, the ear loops 30 are less likely to become contaminated, further improving hygiene. Note that the length of the ear loops 30 parallel to the horizontal direction of the mask body 2 refers to the length of the ear loops 30 when they are not extended (before the heating device 1 is used) (hereinafter referred to as the "initial length").

[0054] The length ED1 (see FIG. 2) of the upper ear loops 301A, 301B is preferably 30 mm or more, more preferably 35 mm or more, and even more preferably 40 mm or more, from the viewpoint of preventing the upper ear loops from slipping when worn over the wearer's ears even when worn for a long period of time, and is preferably 90 mm or less, more preferably 80 mm or less, and even more preferably 70 mm or less, from the viewpoint of preventing unnatural folding inside the mask body 2 when folded from the center line. Note that "the length ED1 of the upper ear loops 301A, 301B" refers to the initial length of a straight line connecting the center point of the joining edge of the upper ear loops 301A, 301B to the center point of the open edge, as shown in FIG. 2.

[0055] The length ED2 (see FIG. 2) of the lower ear loops 302A, 302B is preferably 40 mm or more, more preferably 50 mm or more, and even more preferably 60 mm or more, from the viewpoint of applying pressure from the lower ear loops to the cheeks while reducing strain on the ears, and is preferably 100 mm or less, more preferably 80 mm or less, and even more preferably 70 mm or less, from the viewpoint of preventing unnatural folding inside the mask body 2 when folded from the center line. Note that the "length ED2 of the lower ear loops 302A, 302B" refers to the initial length of a straight line connecting the center point of the joining edge of the lower ear loops 302A, 302B to the center point of the open edge, as shown in FIG. 2.

[0056] The lower end of each of the two sets of ear loops 30 in the vertical direction at the connection point with the mask body 2 is located closer to the underchin than the slit 7. In this embodiment, the lower end 30a of the joining edge of the lower ear loops 302A, 302B is located lower (closer to the underchin) than the slit 7 formed in the mask body 2 in the vertical direction. Specifically, the distance ΔH between the end 7a of the slit 7 on the ear loop joining portion 5c side and the lower end 30a of the joining edge of the lower ear loops 302A, 302B is preferably 30 mm or more, more preferably 40 mm or more, and even more preferably 50 mm or more, from the viewpoint of reducing the risk of the ear loops tearing when worn, and is preferably 100 mm or less, more preferably 90 mm or less, and even more preferably 70 mm or less, from the viewpoint of maintaining a good appearance. Here, the distance ΔH refers to the linear distance in the up-down direction (vertical direction) from the end 7a of the slit 7 on the ear hook joint 5c side to the lower end 30a of the joint edge of the lower ear hooks 302A, 302B. With this configuration, the mask body 2 can be pressed against the wearer's face while being lifted from the under-chin side toward the cheek side. In particular, as will be described later, the presence of the heating element 20 in the area under the chin of the slit 7 allows the heating element 20, which has higher rigidity than the mask body 2, to press against the wearer's face, thereby providing an excellent massage effect.

[0057] The ear loops 30 may be made of the same material as the mask body 2 or a different material. However, from the viewpoint of improving the pressure of the mask body 2 against the wearer's face, a stretchable material is preferable, and a material that easily stretches in the lateral direction of the mask body 2 is preferable. In this embodiment, the ear loops 30 are preferably made of nonwoven fabric, and a stretchable nonwoven fabric is more preferable. From the viewpoint of bonding with the mask body 2, it is preferable that the constituent fibers contain a thermoplastic resin. Furthermore, from the viewpoint of ease of processing, it is more preferable that the ear loops 30 contain polypropylene. Note that the ear loops 30 may further contain a thermoplastic resin or a thermoplastic elastomer other than polypropylene. For example, it is preferable to further contain one or more selected from the group consisting of urethane, polyethylene, and polyethylene terephthalate, and it is more preferable to use synthetic fibers made of urethane. This configuration allows the ear loops 30 to efficiently exhibit flexibility and fit, and also allows the heating device 1 to exhibit sufficient strength when in use.

[0058] In this embodiment, the ear hole 32 has an ear insertion hole 32a through which the wearer's ear can be inserted and an auxiliary slit 32b branching off from the ear insertion hole 32a. In this embodiment, the ear insertion hole 32a is a slit that expands when the ear is inserted, but this is not limited thereto and may be an opening large enough to insert the ear, or may have any other configuration. The auxiliary slits 32b also serve to efficiently enhance the flexibility and fit of the ear hook 30. However, depending on the desired configuration, the number and locations of the auxiliary slits 32b may be changed, or the shape may be changed. Furthermore, the auxiliary slits 32b may not be provided.

[0059] The seal portion 39 is joined to the ear loop joint portion 5c at the open end portion 5 of the mask body 2, for example, by heat fusion. From the viewpoint of fusion, it is preferable that the ear loop portion 30, the inner sheet 14, and the outer sheet 16 contain the same material (polypropylene). Note that the seal portion 39 is not limited to fusion by heat, and various arbitrary means such as adhesion using an adhesive or sewing can be appropriately used. Furthermore, the seal portion 39 is not limited to a linear shape, and various arbitrary shapes such as a curved shape or a dashed line can be used.

[0060] Here, we will explain the stress of the ear hooks in order to apply pressure to the cheeks while reducing pain behind the ears when the ear hook 30 has upper ear hooks 301A, 301B and lower ear hooks 302A, 302B. Note that the stress of the upper ear hooks 301A, 301B of the ear hook 30 can be adjusted as appropriate as long as it does not cause pain behind the ears when used in combination with the lower ear hooks 302A, 302B.

[0061] The pulling load applied to the fingers of the lower ear hook portion 302A (302B) when pulled is preferably 0.1 N or more, more preferably 0.5 N or more, even more preferably 0.7 N or more, and even more preferably 1.0 N or more so that even men and wearers with strong strength can use it without breaking. Furthermore, the total pulling load is preferably 9.0 N or less, more preferably 5.0 N or less, even more preferably 4.0 N or less, and even more preferably 2.0 N or less so that even children and wearers with weak strength can easily put it on. Here, the pulling load means the load with which the wearer pulls the upper ear hook portion 301A (301B) and the lower ear hook portion 302A (302B) when putting on the heating device 1, and is measured using the following method.

[0062] [Method for measuring the tension load on the lower ear hook] In this embodiment, the stress (N) applied to the ear hooking portion 30 when tensile can be measured by a method based on JIS L1913. Specifically, the initial length of the lower ear hook portion 302A (302B) was set to 55±10 mm, and the sample was stretched to a tensile length of 40±10 mm in a tensile tester at a tensile speed of 300 mm / min toward the open edge (40±10 mm). The tensile strength was measured and this was designated as the tensile load (lower-side tensile load) of the lower ear hook portions 302A, 302B. Here, the "tensile length" refers to the total stretched length minus the initial length.

[0063] Furthermore, the load applied to the ears of the lower ear hooks 302A (302B) when worn is preferably 0.10 N or more, more preferably 0.12 N or more, and even more preferably 0.18 N or more, from the viewpoint of improving the pressure of the mask body 2 against the wearer's face. Furthermore, the total of these loads is preferably 0.4 N or less, more preferably 0.3 N or less, and even more preferably 0.20 N or less, from the viewpoint of reducing the stress applied to the backs of the wearer's ears and easing pain behind the ears. Here, the load when worn refers to the load applied behind the ears immediately after the heating device 1 is worn on the wearer's face, and is measured using the following method.

[0064] [Method for measuring the load on the lower ear hook when worn] In this embodiment, the stress (N) on the ear hooking portion 30 when worn can be measured by a method based on JIS L1913. Specifically, the initial length of the lower ear hook portion 302A (302B) was 55±10 mm, and the sample was stretched to a tensile length of 40±10 mm in a tensile tester at a tensile speed of 300 mm / min toward the open edge (40±10 mm). The sample was then returned 15±10 mm in the tensile tester until the sample reached 25±10 mm. The stress (N) during the return was measured and used as the load (lower side load) of the lower ear hook portions 302A and 302B when worn.

[0065] The total tensile load of upper ear hook portion 301A (301B) and lower ear hook portion 302A (302B) is preferably 0.2 N or more, more preferably 1.0 N or more, even more preferably 1.4 N or more, and even more preferably 2.0 N or more so that even men and strong wearers can use it without breaking. The total tensile load is preferably 20.0 N or less, more preferably 10.0 N or less, even more preferably 8.0 N or less, and even more preferably 4.0 N or less so that even children and weak wearers can easily put it on. The tensile load of upper ear hook 301A (301B) can be measured in the same manner as the tensile load of lower ear hook 302A (302B). That is, the initial length of upper ear hook 301A (301B) is set to 55±10 mm, and the sample is stretched to a tensile length of 40±10 mm in a tensile tester at a tensile speed of 300 mm / min toward the open edge. The tensile strength measured is the tensile load of upper ear hook 301A (301B) (upper side tensile load). The upper and lower tensile loads measured in this manner are then added together, and the load obtained is taken as the tensile load of one set of ear hooks 30 (the sum of the tensile loads of the upper ear hooks 301A (301B) and the lower ear hooks 302A (302B)).

[0066] Furthermore, the total load of the upper ear loops 301A (301B) and the lower ear loops 302A (302B) when worn is preferably 0.2 N or more, more preferably 0.24 N or more, and even more preferably 3.5 N or more, from the viewpoint of improving the pressure of the mask body 2 against the wearer's face. Furthermore, from the viewpoint of reducing stress applied to the backs of the wearer's ears and easing pain thereto, this total load when worn is preferably 0.8 N or less, more preferably 0.6 N or less, and even more preferably 0.41 N or less. The wearing load of the upper ear hook portion 301A (301B) can be measured using the same method as the wearing load of the lower ear hook portion 302A (302B). Specifically, the initial length of the upper ear hook portion 301A (301B) is set to 55±10 mm, and the sample is stretched to a tensile length of 40±10 mm using a tensile tester at a tensile speed of 300 mm / min toward the open edge. The sample is then returned 15±10 mm using the tensile tester, so that the sample is stretched to 25±10 mm. The stress (N) at the return time is measured, and this is the wearing load of the upper ear hook portion 301A (301B) (upper wearing load). The load measured in this way when worn on the upper side and the load measured in this way when worn on the lower side are added together, and the load obtained in this way is used as the load when worn on one set of ear hook parts 30 (the sum of the loads when worn on the upper ear hook part 301A (301B) and the lower ear hook part 302A (302B)).

[0067] These loads can be realized, for example, by the following methods (1) to (3). (1) A method for adjusting the physical properties of the ear hook portion 30. (2) A method of adjusting the ear hook portion 30 by mechanical processing. (3) A method that combines the above (1) and (2).

[0068] [(1) Method for adjusting the physical properties of the ear hook portion 30] As a method for adjusting the physical properties of the ear hooking portion 30 (1), for example, the tensile load and the wearing load can be adjusted to the desired values ​​by adjusting the basis weight and lengths (ED1, ED2) of the nonwoven fabric used in the ear hooking portion 30. The suitable lengths ED1 and ED2 of the nonwoven fabric used in the ear hooking portion 30 are as described above.

[0069] The basis weight of the ear hook 30 is 10 g / m2 from the viewpoint of applying pressure to the cheek. 2 It is preferable that the weight is 20 g / m or more. 2 More preferably, it is 30 g / m or more. 2It is more preferable that the weight is 90 g / m or more. From the viewpoint of wearing the two ear hooks 30 comfortably, 2 Preferably, it is 80 g / m or less. 2 More preferably, it is 70 g / m or less. 2 It is more preferable that:

[0070] (2) Adjustment method by mechanical processing of ear hook portion 30 As an example of the method (2) for adjusting the ear loop portion 30 by mechanical processing, the presence or absence of auxiliary cuts 32b in the ear loop portion 30, as well as the number and shape of these cuts, can be exemplified. This allows the stress on the wearer's ears to be dispersed and the load to be adjusted. Other examples include a method of providing a textured finish to the nonwoven fabric used for the ear loop portion 30, or a method of forming many fine openings in the nonwoven fabric. These processes can improve the stretchability of the nonwoven fabric, allowing the desired load to be applied when worn.

[0071] [(3) A method combining the above (1) and (2)] It is also possible to adjust each wearing load to the desired load by arbitrarily combining the above-mentioned (1) method of adjusting the physical properties of the ear hook portion 30 and the above-mentioned (2) method of adjusting the ear hook portion 30 by mechanical processing.

[0072] [Heating element configuration] The heating element 20 is configured to generate heat, thereby enabling the mask main body 2 to exhibit a heat-generating function. Preferably, one or more heating elements 20 are provided in each of the panels 10A and 10B. In this embodiment, as shown in FIG. 3, a total of four heating elements 20 are provided, two on each side (left and right ends) of the lateral direction of the mask main body 2, along the vertical direction. That is, the heating element 20 provided in the first panel 10A includes an upper heating element 201A and a lower heating element 202A located below the chin of the upper heating element 201A. The heating element 20 provided in the second panel 10B includes an upper heating element 201B and a lower heating element 202B located below the chin of the upper heating element 201B. The heating characteristics of these four heating elements 20 may be the same or different, but it is more preferable that they are the same.

[0073] Hereinafter, all of the heating elements 20 (upper heating elements 201A, 201B and lower heating elements 202A, 202B) will be collectively referred to as "heating elements 20" or "two sets of heating elements 20." The two sets of heating elements 20 are defined as two heating elements 20 (upper heating element 201A and lower heating element 202A) on the first panel unit 10A side as one set, and two heating elements 20 (upper heating element 201B and lower heating element 202B) on the second panel unit 10B side as one set.

[0074] As shown in Fig. 3, the upper heating element 201A on the first panel portion 10A side and the upper heating element 201B on the second panel portion 10B side are disposed symmetrically about the vertical center line (closed side end 6). Similarly, the lower heating element 202A on the first panel portion 10A side and the lower heating element 202B on the second panel portion 10B side are disposed symmetrically about the vertical center line (closed side end 6). Furthermore, the upper heating elements 201A, 201B and the lower heating elements 202A, 202B are disposed apart in the vertical direction of the mask body 2, with the slit 7 in the mask body 2 as the boundary.

[0075] The heating device 1 according to this embodiment is configured so that the heating element 20 is present at least in the region under the chin of the slit 7 of the mask body 2. Here, "at least present" means that all or part of the heating element 20 is located in that region. In this embodiment, the lower heating elements 202A, 202B are arranged so that the entire lower heating elements 202A, 202B are contained in the region under the chin of the slit 7 of the mask body 2. On the other hand, the upper heating elements 201A, 201B are arranged so that the entire upper heating elements 201A, 201B are contained in the region on the eye side of the slit 7 of the mask body 2.

[0076] Furthermore, each heating element 20 is positioned at a predetermined distance from the vertical center line (closed side end 6) so that when the heating device 1 is worn in front of the wearer's face, it comes into direct or indirect contact primarily with the wearer's cheeks. Specifically, as shown in Fig. 7, in a plan view with the mask body 2 folded about the vertical center line, each heating element 20 is positioned so that the distance D1 between the end of each heating element 20 on the vertical center line side and the vertical center line is preferably 5 mm or more, more preferably 10 mm or more, even more preferably 15 mm or more, and even more preferably 25 mm or more. Furthermore, from the viewpoint of increasing pressure on the wearer's face while preferentially warming the wearer's cheeks, the distance D1 is preferably 60 mm or less, more preferably 55 mm or less, even more preferably 50 mm or less, and even more preferably 40 mm or less. If the distance D1 is large, each heating element 20 (especially the upper heating elements 201A, 201B) will be positioned closer to the temples, reducing the warming effect on the cheeks and reducing the pressure on the wearer's face, so it is preferable to set the distance D1 within the above-mentioned range. Here, the distance D1 refers to the linear distance along the horizontal direction between the end of each heating element 20 closest to the vertical center line and the most expanded point (expansion point) Pmax of the vertical center line (closed side end 6).

[0077] Furthermore, in a plan view of the mask body 2 folded about the top and bottom center line, as shown in Fig. 7, each heating element 20 is arranged so that the distance D2 between the end of each heating element 20 on the open-side end 5 side and the open-side end 5 is preferably 40 mm or less, more preferably 30 mm or less, and even more preferably 20 mm or less. Here, the distance D2 refers to the linear distance along the lateral direction between the end of each heating element 20 closest to the open-side end 5 and the open-side end 5. Note that if the end of each heating element 20 on the open-side end 5 side and the open-side end 5 are not parallel to each other, the linear distance between the furthest points can be taken as the distance D2.

[0078] From the viewpoint of focusing on warming the wearer's cheeks, it is preferable that the distance D2 be as small as possible within the range in which each heating element 20 fits within the first panel portion 10A and the second panel portion 10B, but from the viewpoint of reliably securing an area for joining each ear hook portion 30 to each panel portion 10A, 10B, it is preferably 3 mm or more, more preferably 5 mm or more, and even more preferably 8 mm or more. Specifically, the distance D2 is preferably 20% or less of the depth PD of each panel portion 10A, 10B, more preferably 15% or less, even more preferably 10% or less, and preferably 1% or more, more preferably 3% or more, and even more preferably 5% or more.

[0079] 7, in a plan view with the mask body 2 folded along the vertical centerline, the heating elements 20 are arranged such that the separation distance D3 between the upper heating elements 201A, 201B and the lower heating elements 202A, 202B is preferably 3 mm or more, more preferably 5 mm or more, and even more preferably 8 mm or more, from the viewpoint of facilitating the creation of slits 7. Furthermore, from the viewpoint of arranging the heating elements 20 around the cheeks, the separation distance D3 is preferably 40 mm or less, more preferably 30 mm or less, and even more preferably 20 mm or less. Here, the separation distance D3 refers to the linear distance in the vertical direction between the under-chin end of the upper heating elements 201A, 201B and the eye-side end of the lower heating elements 202A, 202B. In addition, if the under-chin side ends of the upper heating elements 201A, 201B and the eye side ends of the lower heating elements 202A, 202B are not parallel to each other, the linear distance at the closest point can be set as the separation distance D3.

[0080] Furthermore, it is preferable that the total area of ​​all the heating elements 20 provided on the mask body 2 has a predetermined occupancy rate with respect to the entire area of ​​the surface of the mask body 2 facing the wearer. Specifically, the ratio of the total area of ​​the heating elements 20 to the entire area of ​​the surface of the mask body 2 facing the wearer is preferably 40% or more, more preferably 45% or more, from the viewpoint of warming a wide area of ​​the wearer's face. Furthermore, this ratio is preferably 80% or less, more preferably 70% or less, from the viewpoint of maintaining the mask body 2 in a shape suitable for use as a mask. In this embodiment, the entire area of ​​the surface of the mask body 2 facing the wearer refers to the surface area of ​​the inner surface (rear surface area) of the mask body 2 when it is held in a three-dimensional shape. Such a rear surface area is determined by measuring the weight (g) of the sheet (i.e., the inner sheet 14) that forms the inner surface when it is held in a three-dimensional shape, and then multiplying the measured weight (g) by a predetermined basis weight (g / m2) of the inner sheet 14. 2 ) can be calculated based on

[0081] These heating elements 20 are formed to have the same shape and size, and in this embodiment, all are formed in a flat rectangular shape. However, the planar shape of the heating elements 20 is not particularly limited and may be circular, polygonal, etc. From the viewpoints of manufacturing efficiency, ease of handling, and heating and humidifying effect, quadrangular shapes such as rectangular or approximately square are preferred, and from the viewpoint of ease of handling, an approximately square shape is more preferred.

[0082] Furthermore, it is preferable that each heating element 20 is a water vapor generator (hot steam generator) that generates heat and water vapor by reacting with oxygen in the air, and is capable of supplying heated water vapor to the user.

[0083] Specifically, the heating element 20 according to this embodiment is configured to generate hot steam by an oxidation reaction of an oxidizable metal. Examples of the form of the heating element 20 include a powder mixture (see, for example, JP 2004-16753 A (JP 2002-180501 A)), a sheet such as a paper-made sheet (see, for example, JP 2005-058744 A (JP 2004-31360 A)), or a coated sheet in which a dispersion or the like is applied to a substrate (see, for example, JP 2013-146555 A (JP 2012-279804 A)). The heating element 20 preferably contains an oxidizable metal, a carbon component, and water.

[0084] The oxidizable metal is a metal that generates heat during oxidation reaction, and examples thereof include powders or fibers of one or more metals selected from iron, aluminum, zinc, manganese, magnesium, and calcium. Among these, iron is preferred in terms of ease of handling, safety, production cost, storage stability, and stability, and iron powder is particularly preferred. Examples of iron powder include reduced iron powder and atomized iron powder. The particle size of the oxidizable metal particles can be, for example, about 0.1 μm or more and 300 μm or less.

[0085] The carbon component has at least one of the functions of water retention, oxygen supply, and catalytic activity, and preferably has all three. As the carbon component, for example, one or more selected from activated carbon, acetylene black, and graphite can be used. Among these, activated carbon is more preferably used because it easily adsorbs oxygen when wet and maintains a constant moisture content in the heating element.

[0086] The heating element 20 further contains a water-retaining material, and there are no particular restrictions on the type of water-retaining material as long as it can retain water, but it is preferable that it has excellent vapor dissipation properties. Examples of the water-retaining material include one or more types selected from water-absorbing powders such as carbon components, fibrous materials, superabsorbent polymers (SAP), starch, zeolite, perlite, and vermiculite. An appropriate water-absorbing agent is used depending on the form of the heating element 20.

[0087] The structure of the heating element 20 will now be described in detail. As shown in FIG. 5, the heating element 20 is a rectangular flat body having a heating layer 70 between a base layer 50 and a water-retaining layer 60. The first sheet 27 on the water-retaining layer side and the second sheet 80 on the base layer side are sealed in a closed space by joining the peripheral edges of the two sheets. The bag-like structure of the first sheet 27 on the water-retaining layer side and the second sheet 80 on the base layer side allows for appropriate adjustment of the amount of heat and steam. If the first sheet 27 is breathable, steam can be efficiently discharged toward the user. The heating layer 70 may be provided on one side of the water-retaining layer 60, or may be sandwiched between the water-retaining layer 60 and the base layer 50. FIG. 5 shows an example in which the heating layer 70 is sandwiched between the water-retaining layer 60 and the base layer 50.

[0088] The total cumulative amount of water vapor generated by the heating elements 20 over 10 minutes from the start of water vapor generation (hereinafter referred to as the "10-minute steam generation amount") is preferably 160 mg or more, more preferably 300 mg or more, even more preferably 1000 mg or more, and even more preferably 1600 mg or more, from the viewpoint of supplying sufficient steam to the wearer's face. Furthermore, from the viewpoint of maintaining a comfortable temperature, the 10-minute steam generation amount is preferably 2400 mg or less, more preferably 2200 mg or less, even more preferably 2000 mg or less, and even more preferably 1800 mg or less. Note that this 10-minute steam generation amount refers to the total amount (total) of all heating elements 20 installed in the mask body 2.

[0089] In the heating element 20 according to this embodiment, the amount of steam generated per cell in 10 minutes is preferably 80 mg or more, more preferably 200 mg or more, and even more preferably 400 mg or more. Furthermore, the amount of steam generated per cell in 10 minutes is preferably 600 mg or less, more preferably 550 mg or less, even more preferably 500 mg or less, and even more preferably 450 mg or less. This configuration allows for the amount of steam generated from each cell to be appropriately adjusted, and the steam emitted from the cells does not become too hot, allowing for the supply of appropriate steam and heat to the user's skin.

[0090] [Water vapor generation measurement method] In this disclosure, "steam is generated" refers to a total water vapor generation rate of 10 mg / 10 min or more from one cell of the heating element 20, as measured by the following method. This water vapor generation rate can be easily achieved by using, for example, a paste containing an oxidizable metal, a carbon material, and water as the heating element 20. Here, the 10-minute steam generation rate of the heating element 20 is a value measured as follows using the apparatus 40 shown in FIG. 6. In the following description, the target is an unheated heating element 20 that is sealed in an oxygen-shielding bag or the like. The "start of heat generation" is defined as the time required from the start of opening the oxygen-shielding bag, exposing the heating element 20 to an oxygen-containing atmosphere such as air, and placing the heating element 20 in the measuring apparatus 40 shown in FIG. 6, i.e., 5 seconds after the start of opening. The apparatus 40 shown in FIG. 6 includes an aluminum measurement chamber (volume 4.2 L) 41, an inlet channel 42 through which dehumidified air (humidity less than 2%, flow rate 2.1 L / min) flows into the lower part of the measurement chamber 41, an outlet channel 43 through which air flows out from the upper part of the measurement chamber 41, an inlet thermo-hygrometer 44 and an inlet flow meter 45 provided in the inlet channel 42, an outlet thermo-hygrometer 46 and an outlet flow meter 47 provided in the outlet channel 43, and a thermometer (thermistor) 48 provided in the measurement chamber 41. The thermometer 48 has a temperature resolution of about 0.01°C. Note that the amount of steam generated in this specification refers to the total amount measured up to 10 minutes after the "start of heat generation" of the heating element 20.

[0091] The heating element 20 may contain, for example, fragrance ingredients described in "Synthetic Fragrance Chemistry and Product Knowledge" (by Genichi Indo, published by The Chemical Daily) within the range that does not impair the effects of the present invention. Specific examples include terpene hydrocarbons such as myrcene, farnesene, pinene, limonene, camphene, phellandrene, terpinene, terpinolene, p-cymene, cedrene, and caryophyllene; aldehydes such as hexyl cinnamic aldehyde, 2-methyl-3-(4-tert-butylphenyl)-propanal, 4-(4-hydroxy-4-methylpentyl)-3-cyclohexene-1-carboxaldehyde, and vanillin; aromatic alcohols such as benzyl alcohol, phenylethyl alcohol, pamplefleur (2-methyl-4-phenylpentanol), dimethylbenzyl carbinol, and phenylhexanol (3-methyl-5-phenylpentanol); phenols such as anethole and eugenol; and lactones such as γ-nonalactone and γ-undecalactone.

[0092] [How to use the heating tool] Next, a method of using the heating device 1 according to this embodiment will be described. In this embodiment, the heating element 20 is integrated with the mask body 2, so the entire heating device 1 is stored sealed in an oxygen-blocking bag. In this storage state, the mask body 2 is folded around the vertical center line with the ear loops 30 folded inward.

[0093] First, when putting on the device, the wearer opens the packaging bag and removes the heating device 1 from the oxygen-blocking bag. This brings the heating element 20 into contact with air, and the heating element 20 starts to generate heat due to an oxidation reaction of the oxidizable metal contained in the heating element 20.

[0094] After removing the heating device 1 from the oxygen-blocking bag, the wearer opens the folded mask body 2 from the open end 5 and removes the two pairs of ear loops 30 (upper ear loops 301A, 301B and lower ear loops 302A, 302B) from inside the mask body 2. Then, with the mask body 2 placed against the face, the wearer first pulls one of the upper ear loops 301A with their fingers and inserts the ear through the ear hole 32 to hook it over one of the wearer's ears. Similarly, the other upper ear loop 301B is pulled with their fingers and inserted into the ear hole 32 to hook it over the other ear. In this way, the upper pair of ear loops 30 (upper ear loops 301A, 301B) are first hooked over the wearer's left and right ears, and the heating device 1 is temporarily placed in front of the wearer's face, as shown in Figure 8.

[0095] Then, with the heating device 1 temporarily placed in front of the wearer's face in this way, as shown in Fig. 8, one lower ear loop portion 302A is pulled with the fingers and inserted into the ear hole 32, thereby further hooking it onto one of the wearer's ears to which the upper ear loop portion 301A is already hooked. Similarly, the other lower ear loop portion 302B is pulled with the fingers and inserted into the ear hole 32, thereby further hooking it onto the other ear to which the upper ear loop portion 301B is already hooked. In this way, by further hooking the pair of lower ear loop portions 30 (lower ear loop portions 302A, 302B) onto the wearer's left and right ears, the heating device 1 can be held against the wearer's face with the mask body 2 enveloping at least the wearer's cheeks and under the chin, as shown in Fig. 9.

[0096] Normally, when the pair of lower ear loops 30 (lower ear loops 302A, 302B) are hooked onto the wearer's left and right ears, distortion occurs in the mask body 2, resulting in a large gap between the mask body 2 and the wearer's face. In other words, to transform a flat shape into a three-dimensional one, it is necessary to destroy the flat shape, which manifests as distortion. Such distortion is particularly noticeable when a highly rigid heating element 20 is disposed. In contrast, in the heating device 1 according to this embodiment, the lateral slits 7 are formed in a position above the lower ear loops 30 (lower ear loops 302A, 302B) on the mask body 2. This allows the slits 7 to absorb distortions that occur in the mask body 2, enabling the mask body 2 to fit the wearer's face. Furthermore, in the heating device 1 according to this embodiment, the heating element 20 is located below the slits 7 (in the region below the chin), allowing the heating element 20 to press against the wearer's cheeks in a lifting manner, thereby achieving an excellent massage effect.

[0097] When the mask body 2 covers at least the cheeks and under the chin of the wearer, the heating element 20 generates heat, which heats the water contained in the heating element 20, turning it into steam (hot steam) at a predetermined temperature. This hot steam is then released through the inner sheet 14 of the mask body 2 and supplied to the wearer's face. In this way, the heating device 1 according to this embodiment can supply hot steam to the wearer in a simple manner, providing beauty benefits such as relieving skin problems and a relaxing effect. Furthermore, the mask body 2 and heating element 20 are pulled to the wearer's face with a predetermined pressure by the ear loops 30, thereby compressing the wearer's face and providing an excellent massage effect.

[0098] [Advantages of the heating device according to this embodiment] As explained above, the heating device 1 of this embodiment comprises a mask body 2 having vertical and horizontal lengths sufficient to cover at least the cheeks and under the chin of the wearer, a heating element 20 provided on the mask body 2, and ear loops 30 provided on both horizontal sides of the mask body 2 and holding the mask body 2 in front of the wearer's face so that at least the cheeks and under the chin of the wearer are covered by the mask body 2, the mask body 2 has slits 7 between the horizontal center and each side of the mask body 2, the slits 7 extending in a direction in which the horizontal component along the horizontal direction of the mask body 2 is greater than the vertical component along the vertical direction of the mask body 2, the heating element 20 is located at least in an area below the chin of the slits 7, and the lower vertical end 30a of the ear loops 30 at the connection part with the mask body 2 is located below the chin of the slits 7.

[0099] As described above, the heating device 1 having such a configuration can provide a heating effect to the wearer's face using the heat from the heating element 20, thereby providing beauty benefits such as relieving skin problems and a relaxing effect. Furthermore, as described above, the heating device 1 according to this embodiment has the significant advantage that it can simultaneously provide an excellent massaging effect, since the slits 7 absorb distortions that occur in the mask body 2 and the heating element 20 located below the slits 7 (in the area below the chin) can apply pressure to lift the wearer's cheeks.

[0100] Furthermore, in a plan view of the heating device 1 according to this embodiment with the mask body 2 folded about the vertical center line, the length L of an imaginary line VL linearly connecting the vertical upper end (intersection IPt) and lower end (intersection IPb) of the vertical center line is 110 mm or more and 250 mm or less. By having such a configuration, the heating device 1 according to this embodiment has the further advantage of being able to cover a wide range including the cheeks and under the chin of the wearer.

[0101] Furthermore, the heating device 1 of this embodiment has the further advantage that, when viewed in a plane with the mask body 2 folded about the upper and lower center lines, the slit 7 has a length that is 20% or more of the length L of the imaginary line VL, which allows the upper heating elements 201A, 201B and the lower heating elements 202A, 202B to overlap without leaving a large gap when worn, and reduces the lifting of the end of the slit 7 on the closed side end 6 side.

[0102] Furthermore, the heating device 1 of this embodiment has the further advantage that the angle between the imaginary line VL and the slit 7 is greater than or equal to 80° and less than or equal to 120°, which makes it less likely for a gap to form between the face and the mask body 2 when worn.

[0103] Furthermore, the heating device 1 according to this embodiment is provided with upper heating elements 201A, 201B and lower heating elements 202A, 202B on the first panel portion 10A and the second panel portion 10B, respectively, and these upper heating elements 201A, 201B and lower heating elements 202A, 202B are arranged at a distance along the vertical direction of the mask body 2, and a slit 7 is formed between the upper heating elements 201A, 201B and the lower heating elements 202A, 202B. By being configured in this way, the heating device 1 according to this embodiment has the further advantage of being able to provide a thermal effect over a wide area of ​​the wearer's face, as well as a massaging effect over a wide area of ​​the wearer's face.

[0104] Furthermore, in such a heating device 1, by adjusting the distance between the upper heating elements 201A, 201B and the lower heating elements 202A, 202B, it is possible to configure the lower heating elements 202A, 202B to partially ride up onto the upper layer of the upper heating elements 201A, 201B when distortion of the mask body 2 is absorbed by the slits 7. With this configuration, the upper heating elements 201A, 201B and the lower heating elements 202A, 202B overlap, thereby increasing the overall pressure on the wearer's face, while also locally increasing the pressure in the areas where the upper heating elements 201A, 201B and the lower heating elements 202A, 202B overlap, which has the significant advantage of providing a sharp pressure and providing an acupressure effect.

[0105] Furthermore, in the heating device 1 according to this embodiment, the ear loops 30 comprise upper ear loops 301A, 301B and lower ear loops 302A, 302B that are positioned below the chin from the upper ear loops 301A, 301B, and the lower end portions 30a in the vertical direction at the connection points between the lower ear loops 302A, 302B and the mask body 2 are positioned below the chin from the slits 7. By having this configuration, the heating device 1 according to this embodiment can increase the pressure on the wearer's face compared to when one ear loop 30 is provided on each side, and can also increase the lifting effect of the wearer's cheeks, which has the further advantage of providing a better massage effect.

[0106] Furthermore, the heating device 1 according to this embodiment has a load of 0.10 N or more and 0.4 N or less when worn on the lower ear hooks 302A, 302B, which is applied to the ears when worn, so that it is possible to reduce the stress applied to the backs of the wearer's ears and alleviate pain behind the ears while maintaining pressure on the wearer's face. In other words, a heating device 1 with this kind of configuration has the further advantage of being able to achieve a good balance between the feeling of pressure applied to the wearer's face (massage effect) and the load applied to the backs of the ears (pain behind the ears), making it even more comfortable to use.

[0107] Furthermore, the heating device 1 of this embodiment has breathing holes 8 in the areas of the mask body 2 that correspond to the wearer's nose and mouth, which has the added advantage of alleviating breathlessness and preventing discomfort caused by the nose and mouth coming into contact with the mask body 2.

[0108] Furthermore, the heating device 1 of this embodiment has the further advantage that excellent beauty and relaxation effects can be obtained because the heating element 20 generates hot steam through the oxidation reaction of the oxidizable metal, and the steam generated by the heating element 20 can be supplied to the wearer's face.

[0109] [Variations] While the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope of the above-described embodiments. Various modifications and improvements can be made to the above-described embodiments.

[0110] For example, in the above embodiment, the heating device is described as a face mask type that can cover the cheeks and under the chin, but it is not limited to this. For example, it can also be used as a heating device that covers the entire face.

[0111] In the above-described embodiment, the mask body 2 is described as having a first panel portion 10A and a second panel portion 10B and is configured to be deformable from a folded state to a three-dimensional state, but this is not limited to this and the shape may be retained in advance.

[0112] In the above-described embodiment, the mask body 2 is described as being formed by overlapping the first panel portion 10A and the second panel portion 10B, which are separated from each other, and subsequently joining them at the closed side end 6. However, this is not limited to this, and for example, the first panel portion 10A and the second panel portion 10B may be formed by folding a single sheet-like member that is integrally continuous along the vertical center line and locally joining the discontinuous portions.

[0113] In the above-described embodiment, the first panel unit 10A and the second panel unit 10B are respectively provided with the upper heating elements 201A, 201B and the lower heating elements 202A, 202B. However, this is not limited to this, and various other configurations can be adopted as long as the heating elements 20 are located at least in an area below the jaw from the slits 7. For example, only the lower heating elements 202A, 202B may be provided, or the upper heating element 201A (201B) and the lower heating element 202A (202B) may be connected in the vertical direction to form a single heating element 20. In the latter case, it is preferable that the slits 7 be formed so as to avoid the upper and lower integrated heating elements 20.

[0114] In the above-described embodiment, the upper heating elements 201A, 201B and the lower heating elements 202A, 202B are arranged at a distance from each other in the up-down direction of the mask body 2, and the slit 7 is formed therebetween. However, this is not limiting. For example, the upper heating elements 201A, 201B and the lower heating elements 202A, 202B may be arranged in contact with each other. Furthermore, the slit 7 may be formed at a position outside the gap between the upper heating elements 201A, 201B and the lower heating elements 202A, 202B, for example, at a lateral position different from the lateral positions of the upper heating elements 201A, 201B and the lower heating elements 202A, 202B.

[0115] In the above-described embodiment, the ear loops 30 have been described as comprising upper ear loops 301B and lower ear loops 302B, but this is not limited to this. Various arbitrary configurations can be adopted as long as the mask body 2 can be held in front of the wearer's face and the lower end 30a in the vertical direction at the connection part with the mask body 2 is positioned below the chin with respect to the slit 7. For example, as shown in FIG. 10, a single ear loop 30' may be provided, one on each side (left and right end) in the lateral direction of the mask body 2, for a total of two, or as shown in FIG. 11, a single elastic ear loop 30'' may be provided. Furthermore, two elastic ear loops may be provided along the vertical direction, for a total of four. Furthermore, three or more ear loops may be provided along the vertical direction. In the first modified example shown in FIG. 10 and the second modified example shown in FIG. 11, the same reference numerals as those in the heating implement 1 according to this embodiment are used for components common to those in the heating implement 1 according to this embodiment.

[0116] In the above-described embodiment, the breathing holes 8 are provided in the areas corresponding to the nose and mouth of the wearer, but the present invention is not limited to this, and as already described, the mask may be configured so that only the nose of the wearer is exposed, or only the mouth of the wearer is exposed. Also, the mask may be configured so that the breathing holes 8 are not provided.

[0117] In the above-described embodiment, the heating element 20 is described as generating hot steam through an oxidation reaction of an oxidizable metal, but this is not limited to this, and various other configurations can be adopted, such as a configuration in which a moisture-retaining filter can be humidified by heating it in a microwave oven or the like before use.

[0118] In the above-described embodiment, two heating elements 20 are provided on each of the first panel portion 10A and the second panel portion 10B. However, this is not limited thereto. For example, one or three or more heating elements may be provided on each of the first panel portion 10A and the second panel portion 10B. As described above, the heating elements 20 are not limited to being enclosed within the first panel portion 10A and the second panel portion 10B. Instead, a pocket-shaped storage compartment may be provided on the inner surface of the mask main body 2, and the heating elements 20 may be attached and detached to the storage compartment. Alternatively, the heating elements 20 may be fixed to the inner surface of the mask main body 2 using a fixing means such as an adhesive. Furthermore, in such a type in which the heating elements 20 are attached to the mask main body 2 afterward, the heating elements 20 alone may be stored sealed in an oxygen-blocking bag. When multiple heating elements 20 are provided, the respective heating elements 20 may have the same or different vapor characteristics and shapes. However, from the viewpoint of uniformly supplying vapor and fragrance to the wearer, it is preferable that the heating elements 20 have the same shape and vapor characteristics.

[0119] It is clear from the claims that the above-mentioned modifications are included within the scope of the present invention. [Example]

[0120] The present invention will be specifically described below based on examples, but the object of the present invention is not limited to these examples.

[0121] [Example 1] The heating device according to Example 1 was produced according to the following procedure.

[0122] [Preparation of Heating Element] First, the heating element 20 was obtained by the following method. Specifically, an electrolyte solution of salt and a thickener (Labor Gum GS-C, manufactured by DSP Gokyo Food & Chemical Co., Ltd.) was dissolved in tap water. Iron powder (reduced iron powder, manufactured by Dowa IP Creation Co., Ltd.) was added as an oxidizable metal and stirred. Activated carbon (Carborafine, manufactured by Osaka Gas Chemicals Co., Ltd.) was then added as a reaction accelerator and stirred thoroughly until uniformly dispersed, resulting in a paste-like exothermic composition. The salts used were sodium chloride (Japanese Pharmacopoeia sodium chloride, manufactured by Tomita Pharmaceutical Co., Ltd.), tripotassium phosphate (food additive tripotassium phosphate, manufactured by Yoneyama Chemical Co., Ltd.), and potassium hydroxide (liquid caustic potash (48%), manufactured by Asahi Glass Co., Ltd.). The composition ratios were 55.2% iron powder, 34.2% water, 4.4% activated carbon, 0.1% thickener (xanthan gum), 1.0% tripotassium phosphate, 0.1% potassium hydroxide, and 5.0% sodium chloride. Then, the heat-generating paste composition was applied to a polyethylene-laminated tissue paper with a basis weight of 745 g / m. 2 Then, a sheet of wood pulp paper (basis weight 20 g / m) was applied onto the heat-generating composition. 2 , manufactured by Ino Paper Co., Ltd.) and a water-absorbing polymer (spherical, average particle size 300 μm, Aqualic CA, manufactured by Nippon Shokubai Co., Ltd., basis weight 70 g / m 2 ) and wood pulp paper (basis weight 30 g / m 2 A polymer sheet (air permeability of 2 seconds / 100 ml when absorbing 10 to 45% by mass of water by weight of the maximum water absorption capacity) was laminated and integrated with a heat generating layer 70 and a water retention layer 60. This laminate (heat generating layer 70 and water retention layer 60) was cut to a size of 49 mm x 49 mm. Next, the laminate (heat generating layer 70 and water retention layer 60) was sandwiched between a moisture-permeable sheet (one of the first sheet 27 and the second sheet 80) cut to a size of 63 mm x 63 mm and a moisture-impermeable sheet (the other of the first sheet 27 and the second sheet 80), and the four sides of these sheets were heat-sealed to obtain a heat generating element 20 in which the heat generating layer 70 and water retention layer 60 were housed within a bag made of the first sheet 27 and the second sheet 80.

[0123] [Making a heating device] Next, the inner sheet 14 and the outer sheet 16 were laminated to prepare the mask body 2. The inner sheet 14 was made of a nonwoven fabric made of polypropylene and polyethylene (spunlace method, basis weight 60 g / m 2 ) is used, and the outer sheet 16 is a nonwoven fabric made of polyethylene and polyethylene terephthalate (air-through method, basis weight 30 g / m 2 ) was used. The mask body 2 was produced in an oxygen atmosphere. Next, in an oxygen-free atmosphere, a heating element 20 (basis weight 470 g / m) that generates hot steam was placed between the inner sheet 14 and the outer sheet 16. 2 A total of four heating elements 20 were sandwiched, two on each side (left and right ends) in the vertical direction of the lateral sides of the mask body 2. Then, as shown in Table 1 below, a slit 7 was formed between each of the two heating elements 20 arranged in the vertical direction. Next, in the same oxygen-free atmosphere, the inner sheet 14 and the outer sheet 16 were bonded together at their peripheries and in the vicinity of the upper and lower centerlines. Further, a polypropylene nonwoven fabric and an elastic film (spunbonded, basis weight 45 g / m) were laminated on the outer surface of the inner sheet 14. 2 ) was attached to the ear hooks 30 to obtain the heating device according to Example 1.

[0124] The number of slits 7 (number of slits) in the heating device 1 according to Example 1, the length SL (slit length) of the slits 7 in the extension direction, the angle θ (slit angle) of the slit 7 with respect to the imaginary line VL (an imaginary line linearly connecting the upper and lower ends of the vertical center line in the vertical direction), and the ratio (SL / L) of the slit length SL to the length L of the imaginary line VL are as shown in Table 1 below. Note that the number of slits "one" in Table 1 below means that one slit 7 is formed on each side (both panel portions 10A, 10B) of the vertical center line of the mask main body 2. The load when worn (lower side wearing load) of the lower ear hooks 302A, 302B in the heating device 1 according to Example 1, the number of heating elements 20 (number of heating elements), and the number of ear hooks (number of ear hooks) are as shown in Table 1 below. In Table 1 below, the number of heating elements "2" means that two heating elements 20 are formed on each side of the upper and lower center line of the mask main body 2 (both panel portions 10A, 10B). On the other hand, the number of ear hooks "4" means that two upper and two lower ear hooks (upper ear hooks 301A, 301B and lower ear hooks 302A, 302B) are provided on each side of the mask main body 2.

[0125] [Examples 2 and 3] The heating device of Example 2 was obtained in the same manner as Example 1, except that the ratio (SL / L) of the slit length SL to the length SL of the slit 7 in the extension direction and the length L of the virtual line VL was changed, and the load when worn of the lower ear hook portions 302A, 302B (load when worn on the lower side) was changed. Furthermore, a heating device according to Example 3 was obtained in the same manner as Example 1, except that the load when worn on the lower ear hooking parts 302A, 302B (load when worn on the lower side) was changed.

[0126] [Comparative Example] A heating implement according to a comparative example was obtained in the same manner as in Example 1, except that the slits 7 were not formed and the load when worn on the lower ear hooking parts 302A, 302B (load when worn on the lower side) was changed.

[0127] [Function evaluation] For each of Examples 1 to 3 and the Comparative Example, the warmth felt when worn, the pressure felt on the cheeks, and the pain behind the ears caused by the ear hooks were evaluated on a 5-point scale (1 to 5). For this evaluation, the average values ​​of three adult females were rounded to the nearest tenth to obtain the evaluation score for each item. For "warmth," a higher rating indicates a better balance of steam and heat, providing a comfortable, relaxing warmth. For "pressure felt on the cheeks," a higher rating indicates a stronger pressure felt on the face within an acceptable range, resulting in a more refreshing feeling after use compared to before use. For "pain behind the ears," a higher rating indicates less pain behind the ears and a firmer fit behind the ears. These results are shown in Table 1.

[0128] <Warm feeling> 5 points: I felt a strong warmth from the heat and steam, it was not too hot, not too lukewarm, and very comfortable and relaxing. 4 points: Feel the moderate warmth from the heat and steam, not too hot, not lukewarm, and relaxing. 3 points: No problems with use, you can feel the warmth from the heat and steam, and you can relax. 2 points: Slightly hot or lukewarm, but usable without problems. 1 point: Hot or lukewarm, unable to relax while wearing.

[0129] <Cheek pressure> 5 points: You can feel a firm pressure on your cheeks, and your cheeks feel much lighter after use than before. 4 points: You can feel a firm pressure on your cheeks, and your cheeks feel lighter after use than before. 3 points: There is a certain amount of pressure on the cheeks, and after use it feels lighter than before use. 2 points: There is a slight feeling of pressure, and it feels a little lighter after use and can be used without any problems. 1 point: There is almost no pressure or the pressure is too strong and uncomfortable.

[0130] <Pain behind the ear> 5 points: I felt absolutely no pain immediately after putting them on, while wearing them, or when I finished wearing them, and they fit perfectly in my ears and did not slip off. 4 points: Immediately after putting them on, during wearing them, and when you finish wearing them, there is almost no pain, and they fit snugly in your ears and do not slip off. 3 points: Almost no pain is felt immediately after putting on, during wearing, or when finished wearing, but there is a slight shift when finished wearing, but it can be used without any problems. 2 points: You may feel some pain immediately after putting it on, or it may become loose when you finish wearing it, but you can use it without any problems. 1 point: Immediately after putting it on, during wearing it, and at the end of wearing it, you feel pain or it is too loose and comes off.

[0131] [Table 1]

[0132] The results in Table 1 show that the heating devices of Examples 1 to 3 have a higher heating effect on the wearer's face and a higher massage effect due to pressure compared to the Comparative Example. Furthermore, it was also clear that the heating devices of Examples 1 to 3 alleviate pain behind the ears, despite providing a higher massage effect compared to the Comparative Example. [Explanation of symbols]

[0133] 1: Heating equipment 2: Mask body 5: Open end 5a: Eye side edge 5b: Submandibular margin 5c: Ear hook joint 6: Closed end 7: Slit 7a: End 8: Breathing hole 10A: First panel section 10B: Second panel section 14: Inner sheet 16: Outer sheet 20: Heating element 201A: Upper heating element 201B: Upper heating element 202A: Lower heating element 202B: Lower heating element 30: Ear hook 301A: Upper ear hook 301B: Upper ear hook 302A: Lower ear hook 302B: Lower ear hook 30a: Bottom end 31: Ear hook body 32: Ear hook hole 32a: Ear insertion hole 32b: Auxiliary cut 39: Seal part 30': Ear hook part (first modified example) 30´´: Ear hook part (second variant)

Claims

1. A mask body having vertical and horizontal lengths sufficient to cover at least the cheeks and under the chin of the wearer; a heating element provided in the mask body and having a higher rigidity than the mask body; ear loops provided on both lateral sides of the mask body, for holding the mask body in front of the wearer's face so that the mask body covers at least the cheeks and under the chin of the wearer; Equipped with The mask body has an upper and lower center line that divides the mask body in half in the horizontal direction, and includes a first panel portion that forms one half of the peripheral surface of the mask body with the upper and lower center line as the boundary, and a second panel portion that forms the remaining half of the peripheral surface of the mask body, The heating element includes an upper heating element and a lower heating element that are spaced apart along the up-down direction of the mask body, the first panel portion and the second panel portion are provided with the upper heating element and the lower heating element, respectively, and a slit extending in a horizontal direction is formed between the upper heating element and the lower heating element, the upper heating element and the lower heating element are arranged at a predetermined interval so that the upper heating element and the lower heating element overlap each other when worn, a lower end portion of the ear loop portion at a connection portion with the mask body in a vertical direction is located below the chin with respect to the slit, In a plan view of the mask body folded about the vertical center line, the slit has a length that is 30% to 50% of the length of an imaginary line that linearly connects the upper end and the lower end of the vertical center line in the vertical direction. Heating tool.

2. The angle between the virtual line and the slit is 85° or more and 110° or less. The heating device according to claim 1.

3. Each of the ear hooks includes an upper ear hook and a lower ear hook located below the chin relative to the upper ear hook, The lower end of the lower ear hook portion in the vertical direction at the connection portion with the mask body is located below the chin with respect to the slit. The heating device according to claim 1 or 2.

4. The lower ear hook portion has a load of 0.10 N or more and 0.4 N or less when worn on the ear. The heating device according to claim 3.

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