Steam Generator

Abstract

To provide a steam generator capable of supplying a large amount of steam to the whole face.SOLUTION: The steam generator comprises: a bottomed cylindrical mask main body having an opening on a face contact side end part; and one or more steam generation bodies capable of generating steam within the internal space of the mask main body. The mask main body has a peripheral surface extending from the face contact side end part toward a closed side end part located on the opposite side to the face contact side end part such that an internal space is formed between the mask main body and the face of a wearer. The peripheral length of the opening on the face contact side end part of the mask main body is 450 mm or more and 700 mm or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, various face masks that cover the whole face and eye masks that cover the eyes have been proposed for the purpose of beauty such as resolving skin troubles and for the purpose of achieving a relaxing effect. For example, Patent Document 1 discloses a beauty face mask that is impregnated with cosmetics such as beauty essence and that moisturizes the skin when it is placed in close contact with the face. Patent Document 2 discloses an eye mask-type steam generator that can achieve a relaxing effect by using hot steam. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-136072 A [Patent Document 2] JP 2019-155055 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, since the cosmetic face mask of Patent Document 1 moisturizes the skin with pre-impregnated cosmetics, if the amount of pre-impregnated cosmetics is small, a satisfactory feeling cannot be obtained, and conversely, if the amount of pre-impregnated cosmetics is large, dripping may occur.

[0005] In contrast, the eye mask in Patent Document 2 generates hot steam by utilizing the heat of reaction produced by the oxidation reaction of oxidizable metals, making it possible to supply a large amount of hot steam to the eye area without problems such as dripping. However, because the mask is specifically designed to be worn around the user's eyes, it is difficult to supply hot steam to the entire face.

[0006] The present invention relates to a steam generator capable of supplying a large amount of steam to the entire face. [Means for solving the problem]

[0007] The present invention relates to a steam generator comprising a bottomed, cylindrical mask body having an opening at a face-contacting end, and one or more water vapor generators capable of generating steam in the internal space of the mask body, wherein the mask body has a peripheral surface extending from the face-contacting end to a blocked end located opposite the face-contacting end so as to form the internal space between the mask body and the wearer's face, and the peripheral length of the opening at the face-contacting end of the mask body is 450 mm or more and 700 mm or less. Effect of the Invention

[0008] The steam generator according to the present invention makes it possible to supply a large amount of steam to the entire face. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram showing a steam generating device according to one embodiment of the present invention; [Diagram 2] FIG. 2 is a diagram showing a folded state of the steam generating device according to the embodiment. [Diagram 3] 1 is a view of the steam generator seen from the face-contacting end side in a state where the face-contacting end side is expanded. FIG. [Figure 4] FIG. 2 is a view of the steam generator seen from the eyebrow side with the face-contacting end portion expanded. [Diagram 5] FIG. 2 is a diagram showing a state in which the steam generating device according to the present embodiment is attached to a volumetric head model. [Figure 6] FIG. 13 is a diagram showing the state in which the holding portion is folded. [Figure 7] FIG. 2 is a schematic cross-sectional view of a steam generating unit. [Figure 8] FIG. 2 is a schematic plan view showing a steam generating unit. [Figure 9] FIG. 2 is a schematic diagram showing an apparatus for measuring the amount of generated water vapor. [Figure 10]FIG. 13 is a diagram showing a state in which the holding portion is pulled. [Figure 11] FIG. 13 is a diagram showing a state in which the holding part is attached. [Figure 12] FIG. 13 is a diagram showing a steam generating device according to a first modified example. [Figure 13] FIG. 11 is a diagram showing a steam generating device according to a second modified example. [Figure 14] FIG. 13 is a diagram showing a steam generating device according to a third modified example. [Figure 15] FIG. 13 is a diagram showing a steam generating device according to a fourth modified example. [Figure 16] FIG. 13 is a diagram showing a steam generating device according to a fifth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] 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 ratio adjustments have been appropriately made to illustrate the present invention, and may differ from the actual shapes, positional relationships, and ratios.

[0011] [Overall configuration of the steam generator] The steam generator 1 according to this embodiment is a face mask type steam generator capable of covering the entire face of a wearer, and as shown in Fig. 1, comprises a bottomed cylindrical mask body 2 having an opening at one end (face-contacting end 5), and one or more water vapor generating bodies 20 capable of generating steam in an internal space 4 of the mask body 2. The steam generator 1 according to this embodiment further comprises one or more holding parts 30 for holding the mask body 2 in front of the wearer's face.

[0012] In this specification, "covering the entire face" means covering at least the area from the upper eyelid to the lower lip in the vertical direction, and covering at least the area between the left and right cheeks in the width direction.

[0013] In this specification, "tubular with a bottom" means a tube with one end open and the other end closed, and the shape of the body is not limited to a cylindrical shape and may be, for example, a rectangular tube. Hereinafter, the shape in the folded state where the first panel portion 10A and the second panel portion 10B described below are overlapped with each other is referred to as a "bag-like" shape, and the shape in the state where the opening of the face-contacting end portion 5 described below is expanded and the shape is maintained as a tube with a bottom is referred to as a "tubular with a bottom" or "three-dimensional" shape.

[0014] In the following description, the end of the open side (the side that contacts the face) of the mask body 2 formed in a bottomed cylindrical shape is referred to as the "face contact end 5", and the end of the closed side (bottom side) located opposite the face contact end 5 is referred to as the "closed end 6". Furthermore, the upper side of the mask body 2 in a state in which the "face contact end 5" and the "closed end 6" are aligned in the left-right direction and viewed from a planar direction (i.e., the state of FIG. 2) is referred to as the "eyebrow side", and the lower side in the same state is referred to as the "chin side". Here, the "eyebrow side" is the side that is located on the eyebrow side when worn, and the "chin side" is the side that is located on the chin side in the same state. However, the mask body 2 according to this embodiment can also be worn upside down.

[0015] Furthermore, in this specification, the "width direction" refers to the direction from the face-contact side end 5 of the first panel portion 10A described below, via the blocked side end 6, to the face-contact side end 5 of the second panel portion 10B described below, and the "both widthwise ends of the mask body" refers to the face-contact side end 5 of the first panel portion 10A and the face-contact side end 5 of the second panel portion 10B.

[0016] [Mask body configuration] 1, the mask body 2 has a peripheral surface extending from the face-contacting end 5 toward the closed end 6, and is configured such that the peripheral surface forms an internal space 4 between the face of the wearer when the mask is worn. That is, when the mask body 2 is worn, the face-contacting end 5 and the peripheral surface in its vicinity come into contact with the face (skin) of the wearer, while other areas of the peripheral surface and the closed end 6 are spaced away from the face (skin) of the wearer, forming the internal space 4 that can be filled with steam generated from the water vapor-generating element 20.

[0017] Specifically, the mask body 2 includes a first panel portion 10A that forms a semi-circumferential surface of the mask body 2, and a second panel portion 10B that forms the remaining semi-circumferential surface. 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 are formed into a bag shape by joining together the edges, excluding the face-contacting end portion 5 and breathing holes 6d, which will be described later, as shown in Fig. 2.

[0018] The means for joining the first panel portion 10A and the second panel portion 10B is not particularly limited as long as it is a means capable of joining the two panel portions 10A and 10B so that they do not separate, and any means such as pressure bonding, heat welding, ultrasonic welding, high frequency welding, and adhesives can be adopted. In the illustrated example, each joining portion is configured to form a striped pattern in the formation region (stripe pattern), but is not limited thereto, and various configurations can be adopted, such as a configuration in which the entire formation region is pressure bonded (continuous seal shape). Note that instead of a configuration in which the first panel portion 10A and the second panel portion 10B formed as separate bodies are mechanically joined, for example, the first panel portion 10A and the second panel portion 10B may be configured to be formed as one body from the beginning.

[0019] 3, the first panel portion 10A and the second panel portion 10B are configured to be deformed into a bottomed tubular shape by expanding the opening of the face-contacting end portion 5. That is, the first panel portion 10A and the second panel portion 10B are configured to be deformed into a shape with a circular curved surface that is convex in the direction away from each other by expanding the opening of the face-contacting end portion 5, with the closed end portion 6 as the bottom and the face-contacting end portion 5 as the open end. By the deformation of the first panel portion 10A and the second panel portion 10B in this way, the mask body 2 becomes a bottomed tubular shape that opens sideways, with the expanded face-contacting end portion 5 facing the face side and the closed closed end portion 6 facing the opposite side to the face. The mask body 2 has a vertical centerline extending perpendicular to the width direction at the center in the width direction when the mask body 2 is held in a bottomed cylindrical shape, and one side in the width direction of the vertical centerline constitutes the first panel portion 10A, and the other side in the width direction constitutes the second panel portion 10B. That is, the first panel portion 10A forms half of the periphery from the face-contacting end portion 5 to the occluding end portion 6 (either the left or right half of the periphery), and the second panel portion 10B forms the remaining part of the periphery from the face-contacting end portion 5 to the occluding end portion 6 (the remaining half of the periphery).

[0020] 1 and 3, the mask body 2 according to this embodiment has a tapered shape that converges from the widened annular face-contact end 5 to the linear closed end 6, and the closed end 6 forms a vertical center line, when the mask body 2 is in a bottomed cylindrical shape, and the closed end 6 forms a vertical center line. However, the mask body 2 is not limited to this, and the closed end 6 may have a flat bottom.

[0021] As shown in Fig. 3, the face-contacting end 5 of the mask body 2 is configured to form an opening large enough to cover the entire face of the wearer when the mask body 2 is in a bottomed cylindrical shape. Specifically, the perimeter of the opening of the face-contacting end 5 of the mask body 2 is preferably 450 mm or more, more preferably 460 mm or more, even more preferably 480 mm or more, and even more preferably 500 mm or more, from the viewpoint of covering the entire face of the wearer. Moreover, the perimeter of the opening of the face-contacting end 5 of the mask body 2 is preferably 700 mm or less, more preferably 670 mm or less, even more preferably 630 mm or less, and even more preferably 600 mm or less, from the viewpoint of reducing the gap with the wearer's face and reducing the leakage of steam. Here, "perimeter of the opening at the face-contacting end 5" means the total length of the opening edges at the face-contacting end 5, and in this embodiment, it means the total value of the length of the eyebrow side edge 5a, chin side edge 5b and retaining portion joint 5c, described below, at the face-contacting end 5 of the first panel portion 10A, and the length of the eyebrow side edge 5a, chin side edge 5b and retaining portion joint 5c, described below, at the face-contacting end 5 of the second panel portion 10B.

[0022] In addition, the mask body 2 preferably has a vertical length L that allows the apex of the eyebrow side of the face contact end 5 to be located above the eyebrows, preferably on the forehead (between the eyebrows and the hairline), and the apex of the chin side of the face contact end 5 to be located below the mouth, preferably below the chin (between the chin and the neck). From this viewpoint, the mask body 2 has a vertical length L from the apex of the eyebrow side to the apex of the chin side of the face contact end 5 in a state in which the first panel portion 10A and the second panel portion 10B are folded in half along the vertical center line (closed side end 6) as shown in FIG. 2, from the viewpoint of covering the area from above the eyebrows to below the mouth of the wearer, preferably 150 mm or more, more preferably 180 mm or more, even more preferably 200 mm or more, and even more preferably 230 mm or more. In addition, it is preferable that this vertical length L is set within the range of 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, it is preferable that it is 300mm or less, more preferable that it is 285mm or less, further preferable that it is 270mm or less, and further preferable that it is 260mm or less. Here, "the brow side apex of the face contact end 5" refers to the intersection IPt between the brow side edge 5a of the face contact end 5 and the closed side end 6 (the brow side joint 6a described later in this embodiment), and "the chin side apex of the face contact end 5" refers to the intersection IPb between the chin side edge 5b of the face contact end 5 and the closed side end 6 (the chin side joint 6b described later in this embodiment). In addition, "the vertical length L" refers to the length of the straight line distance connecting "the brow side apex of the face contact end 5" and "the chin side apex of the face contact end 5" when the first panel portion 10A and the second panel portion 10B are folded in half along the vertical center line (the closed side end 6). As shown in FIG. 2, when a joint (seal) is formed at the closed end 6 (brow side joint 6a and chin side joint 6b), the "vertical length L" refers to the dimension including the joint (seal), i.e., the outer dimension between the outer end of the brow side joint 6a and the outer end of the chin side joint 6b.

[0023] Furthermore, the mask body 2 preferably has a depth D that allows a sufficient internal space 4 to be formed between the mask body 2 and the wearer's face, and allows hot water vapor to be distributed evenly over the entire face. As shown in FIG. 2, the mask body 2 has a depth D along the width direction from the face-contacting end 5 to the occluded end 6, which is preferably 80 mm or more, more preferably 90 mm or more, even more preferably 100 mm or more, and even more preferably 110 mm or more, from the viewpoint of forming a sufficient internal space 4. Moreover, the depth D is preferably 150 mm or less, more preferably 140 mm or less, even more preferably 130 mm or less, and even more preferably 120 mm or less, from the viewpoint of making the weight of the mask body 2 appropriate and suppressing the mask body 2 from slipping off the wearer's face. Here, the "depth D" refers to the linear distance extending horizontally (in the width direction perpendicular to the vertical direction) from the most expanded point (expansion point) Pmax of the occluded end 6 to the face-contacting end 5.

[0024] In addition, the mask body 2 has an inner surface area (hereinafter referred to as the "reverse surface area") when it is held in a cylindrical shape with a bottom, which is 300 cm2 in order to form a sufficient internal space 4 between the mask body 2 and the wearer's face and to distribute hot steam evenly over the entire face. 2 More than 350cm is preferable. 2 It is more preferable that the back surface area is 600 cm or more from the viewpoint of minimizing the gap with the wearer's face and minimizing the leakage of steam. 2 Preferably, it is less than 550 cm 2 It is more preferable that:

[0025] In particular, in the case of the mask body 2 having the shape shown in FIG. 1 (i.e., the eyebrow side joint portion 6a and the chin side joint portion 6b both extend along the width direction, the main joint portion 6c is formed in an arc shape, and the mask body 2 has an asymmetric shape from top to bottom), the back surface area is 500 cm 2 More than 600cm 2In the case of a mask body 2 having the shape (dome shape) shown in Fig. 15 (i.e., a mask body 2 in which neither the eyebrow side joint 6a nor the chin side joint 6b extends in the width direction, the main joint 6c is formed in an arc shape, and the shape is symmetrical from top to bottom), the back surface area is 300 cm2 or less. 2 More than 400cm 2 It is preferable that:

[0026] Here, the back surface area is determined by measuring the weight (g) of the sheet (i.e., the inner sheet 14) that forms the inner surface when the sheet is held in a bottomed cylindrical shape, and multiplying the measured weight (g) by a predetermined basis weight (g / m2) of the inner sheet 14. 2 ) can be calculated based on

[0027] As shown in FIG. 5, the mask body 2 is shaped like a cylinder with a bottom, and the volume of the internal space 4 when fitted to a volume measurement human head model HM is set to 150 cm from the viewpoint of distributing hot steam evenly over the entire face while maintaining good handling and appearance. 3 It is preferable that the height is 180cm or more. 3 More preferably, it is 220 cm or more. 3 More preferably, it is 250 cm or more. 3 It is even more preferable that the volume of the internal space 4 in this state is 400 cm or more from the viewpoints of facilitating breathing and maintaining good handling and appearance. 3 It is preferable that the length is less than 370 cm. 3 More preferably, it is 330 cm or less. 3 More preferably, it is 300 cm or less. 3 Even more preferably, it is:

[0028] The internal space 4 formed between the mask body 2 and the face of the volumetric head model HM is not limited to a closed space formed by the contact of the mask body 2 with the face of the volumetric head model HM, and may have a small gap between the mask body 2 and the face of the volumetric head model HM. The small gap here refers to a gap that may occur when the steam generator 1 is worn in a normal manner. Even if such a gap exists, the gap is large enough not to impair the effect of the steam generated by the water vapor generating unit 20, and therefore the gap can be treated as being closed along the edge of the mask body 2.

[0029] Here, as the "volume measuring head model HM", a female head model (width 151.24 mm, depth 206.82 mm, height 233.01 mm) shaped based on average female head data (latest data as of September 10, 2020) manufactured by Digital Human Technology Co., Ltd. can be used. In addition, the "state in which the shape is held in a cylindrical shape with a bottom" when measuring the volume of the internal space 4 means a three-dimensional state in which the steam generating device 1 is attached to the volume measuring head model HM (for example, the above-mentioned female head model). The width of the above-mentioned female head model refers to the linear distance between the most prominent points of the left and right ear helices, the depth refers to the linear distance from the back of the head to the most prominent point of the nose, and the height refers to the linear distance along the vertical direction (body axis direction) from the top of the head to the most prominent point under the chin. Therefore, "a state in which the shape is maintained in a cylindrical shape with a bottom" means, in other words, a three-dimensional state in which an ear hole 32, described later, of one holding part 30 and an ear hole 32, described later, of the other holding part 30 are separated by a width (151.24 mm) of a female human head model. The steam generating device 1 attached to the volume measurement human head model HM specifically has the following dimensions. In this embodiment, these dimensions were measured using a long jaw long caliper (CM-50L) manufactured by Mitutoyo Corporation.

[0030] That is, when the steam generator 1 is in a bottomed cylindrical shape (attached to the volumetric human head model HM) as shown in Fig. 3, the length Lopen when the shape is maintained in the vertical direction (direction "L" in Fig. 5) from the apex on the eyebrow side to the apex on the chin side of the face-contacting end 5 is preferably 150 mm or more, more preferably 175 mm or more, even more preferably 190 mm or more, still more preferably 210 mm or more, and preferably 260 mm or less, more preferably 230 mm or less, and even more preferably 220 mm or less. The definition of "length Lopen when the shape is maintained" is the same as the "length L in the vertical direction" described above.

[0031] 3 and 4, in the steam generator 1, when the shape of the steam generator 1 is held in a bottomed cylindrical shape (when the steam generator 1 is attached to the volumetric head model HM), the opening width between the face-contacting end 5 of the first panel part 10A and the face-contacting end 5 of the second panel part 10B (opening width when the steam generator 1 is held in a shape that is not open) is preferably 100 mm or more, more preferably 120 mm or more, and even more preferably 130 mm or more, and is preferably 180 mm or less, more preferably 160 mm or less, and even more preferably 150 mm or less. Here, the "opening width when the steam generator 1 is held in a shape that is not open" refers to the linear distance W between the furthest parts of the face-contacting end 5 of the first panel part 10A and the face-contacting end 5 of the second panel part 10B along the horizontal line (direction perpendicular to the vertical direction and the width direction; the "W" direction in FIG. 5) when the steam generator 1 is held in a bottomed cylindrical shape (when the steam generator 1 is attached to the volumetric head model HM).

[0032] Furthermore, when the steam generator 1 is in a bottomed cylindrical shape (attached to the volume measurement human head model HM) as shown in Fig. 4, the depth Dopen when the shape is maintained along the width direction (direction "D" in Fig. 5) from the face-contacting end 5 to the occluded end 6 is preferably 70 mm or more, more preferably 80 mm or more, and even more preferably 90 mm or more, and is preferably 120 mm or less, more preferably 110 mm or less, and even more preferably 90 mm or less. The definition of "depth Dopen when the shape is maintained" is the same as that of "depth D" described above.

[0033] The volume of the internal space 4 can be measured by using such a volume measuring human head model HM (for example, the female human head model described above) to reproduce the state in which the steam generating device 1 is in use, and converting it into three-dimensional data using a three-dimensional measuring machine.

[0034] In addition to the above-mentioned measurement method using three-dimensional data, the volume of the internal space 4 may be determined by a method of measuring the amount of water remaining in the steam generator 1, as shown in JP 2012-205926 A. That is, first, a liquid-impermeable film is placed on the entire inner surface of the mask body 2, and the steam generator 1 is held in a bottomed cylindrical shape so that the shape-holding length Lopen, shape-holding opening width Wopen, and shape-holding depth Dopen are the same as when the mask is attached to the volume measurement human head model HM. Next, the steam generator 1 in the bottomed cylindrical shape is placed so that the face-contacting end 5 faces upward (the closed end 6 faces downward), and water is poured into the steam generator 1. The face of the volume measurement human head model HM is placed downward on the steam generator 1, the inside of which is filled with water, and the holding part 30 is attached to the ears of the volume measurement human head model HM. Thereafter, the volume measurement human head model HM is removed from the steam generating device 1, and the amount of water remaining in the steam generating device 1 is measured. This method of measuring the amount of water remaining in the steam generating device 1 also gives values ​​that are approximately the same as the measurement method using three-dimensional data and the female human head model described above, so if it is difficult to obtain three-dimensional data due to the shape of the steam generating device 1, the volume of the internal space 4 may be measured by the method disclosed in JP 2012-205926 A.

[0035] The volume of the internal space 4 may be calculated as follows: That is, it may be calculated by subtracting the volume of the part of the volumetric human head model HM that enters the inside of the steam generating device 1 when the steam generating device 1 is attached to the volumetric human head model HM (the volume of the insertion part of the volumetric human head model HM) from the volume of the steam generating device 1 in a state in which the steam generating device 1 is retained in a bottomed cylindrical shape so that the length Lopen when retaining the shape, the open width Wopen when retaining the shape, and the depth Dopen when retaining the shape are the same as when the steam generating device 1 is attached to the volumetric human head model HM (the volume of the steam generating device 1 when not attached).

[0036] Here, the volume of the insertion site of the volumetric head model HM is proportional to the perimeter of the opening of the face-contacting end 5 in the state in which the steam generator 1 is held in a bottomed tubular shape, and can be obtained by the following method. That is, by the same procedure as the method for measuring the amount of water remaining in the steam generator 1 described above, a liquid-impermeable film is placed on the entire inner surface of the mask body 2, the steam generator 1 is held in a bottomed tubular shape, and its inside is filled with water. By measuring the amount of water at this time, the "volume of the steam generator 1 when not worn" is measured. In addition, by the same procedure as the method for measuring the amount of water remaining in the steam generator 1 described above, the amount of water remaining after the face of the volumetric head model HM is placed is measured. Then, the difference between the amount of water before and after the face of the volumetric head model HM is placed is calculated, and this is defined as the "volume of the insertion site of the volumetric head model HM".

[0037] 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 face-contacting end portion 5 toward the occlusion side end portion 6, and in this embodiment, is formed in a roughly fan-like shape.

[0038] Specifically, as shown in Fig. 2, each face-contacting end 5 of the first panel portion 10A and the second panel portion 10B has a retaining portion joint 5c to which the retaining portion 30 is joined, an eyebrow side edge 5a extending from an eyebrow side end (upper end) 5ct of the retaining portion joint 5c to an end of the retaining portion joint 5c side of an eyebrow side joint 6a described later of the closed side end 6, and a chin side edge 5b extending from a chin side end (lower end) 5cb of the retaining portion joint 5c to an end of the retaining portion joint 5c side of a chin side joint 6b described later of the closed side end 6. The retaining portion joint 5c is formed in a straight line extending in the vertical direction, and the eyebrow side edge 5a arranged on the eyebrow side of the wearer and the chin side edge 5b arranged on the chin side of the wearer are inclined in a direction away from each other toward the closed side end 6.

[0039] From the viewpoint of fitting the mask to the inclination of the wearer's forehead, the inclination angle α of the eyebrow side edge 5a is preferably 0° or more, more preferably 10° or more, even more preferably 20° or more, and even more preferably 30° or more. Moreover, from the viewpoint of maintaining the mask body 2 in a cylindrical shape with a bottom and forming a sufficient internal space 4 between the mask body 2 and the wearer's face, the inclination angle α of the eyebrow side edge 5a is preferably 90° or less, more preferably 80° or less, even more preferably 70° or less, and even more preferably 60° or less.

[0040] In addition, the inclination angle β of the chin side edge 5b is preferably 0° or more, more preferably 5° or more, even more preferably 10° or more, and even more preferably 15° or more, from the viewpoint of fitting to the inclination of the chin and the side of the face line of the wearer. In addition, the inclination angle β of the chin side edge 5b is determined from the viewpoint of maintaining the mask body 2 in a bottomed cylindrical shape and forming a sufficient internal space 4 between the mask body 2 and the wearer's face. From this viewpoint, it is preferably 90° or less, more preferably 80° or less, even more preferably 70° or less, and even more preferably 60° or less. More specifically, the inclination angle β of the chin side edge 5b is preferably 5° or more and 80° or less.

[0041] Furthermore, the inclination angle α of the eyebrow side edge 5a and the inclination angle β of the chin side edge 5b are preferably set so that their sum (α+β) is 30° or more, more preferably 35° or more, even more preferably 40° or more, and even more preferably 50° or more, from the viewpoint of fitting the inclination of the wearer's forehead, chin, or face line side. The sum (α+β) of the inclination angles α and β is determined from the viewpoint of maintaining the mask body 2 in a bottomed cylindrical shape and forming a sufficient internal space 4 between the mask body 2 and the wearer's face. From this viewpoint, the sum is preferably 160° or less, more preferably 145° or less, even more preferably 130° or less, and even more preferably 120° or less.

[0042] Here, the "inclination angle α of the eyebrow side edge 5a" refers to the angle formed by the upper extension line ELt of the retaining part joint 5c extending from the eyebrow side end (upper end) 5ct of the retaining part joint 5c and the eyebrow side edge 5a when the first panel part 10A and the second panel part 10B are folded in half along the vertical center line (closed side end 6) as shown in Fig. 2. The "inclination angle β of the chin side edge 5b" refers to the angle formed by the lower extension line ELb of the retaining part joint 5c extending from the jaw side end (lower end) 5cb of the retaining part joint 5c and the jaw side edge 5b when the first panel part 10A and the second panel part 10B are folded in half along the vertical center line (closed side end 6). Both of these upper extension line ELt and lower extension line ELb are parallel to the retaining part joint 5c and are continuous along the extension direction of the retaining part joint 5c.

[0043] In addition, when the brow side edge 5a and the chin side edge 5b are not linear, the inclination angles α and β may be determined by considering a virtual straight line connecting the intersection with the retaining part joint 5c and the intersection with the closed side end 6 (the brow side joint 6a or the chin side joint 6b described later in this embodiment) as the "brow side edge 5a" or the "chin side edge 5b". In addition, when the retaining part joint 5c is not linear and the extension line or the boundary with the brow side edge 5a or the chin side edge 5b cannot be specified, the inclination angles α and β may be determined by the formula "90°-α'" or "90°-β'" after determining the inclination angles α' and β' of the brow side edge 5a or the chin side edge 5b with respect to the width direction (horizontal line) of the mask body 2.

[0044] As shown in FIG. 2, the closed side end 6 of the first panel portion 10A and the second panel portion 10B has a main joint 6c extending in the vertical direction, an eyebrow side joint 6a located between the main joint 6c and the brow side apex of the face-contacting end 5 (the upper end of the eyebrow side edge 5a), and a chin side joint 6b located between the main joint 6c and the chin side apex of the face-contacting end 5 (the lower end of the chin side edge 5b).

[0045] The eyebrow side joint 6a is a portion that joins the eyebrow side ends of the first panel portion 10A and the second panel portion 10B. As shown in FIG. 2, the extension length p of the joint region along the width direction of the eyebrow side joint 6a is preferably 0 mm or more, more preferably 3 mm or more, even more preferably 7 mm or more, and even more preferably 10 mm or more, from the viewpoint of maintaining good handling in the production process and good appearance. Moreover, from the viewpoint of maintaining good fit and appearance on the forehead of the wearer, this extension length p is preferably 70 mm or less, more preferably 65 mm or less, even more preferably 60 mm, and even more preferably 55 mm or less. The eyebrow side joint 6a can be appropriately set to any desired length according to the purpose. For example, when providing good fit to the forehead, it is preferably 5 mm or less, and more preferably 1 mm or less.

[0046] The chin-side joint 6b is a portion that joins the chin-side ends of the first panel portion 10A and the second panel portion 10B. As shown in FIG. 2, the chin-side joint 6b has an extension length q of the joint region along the width direction of 0 mm or more, more preferably 10 mm or more, even more preferably 20 mm or more, and even more preferably 30 mm or more, from the viewpoint of preventing the mask body from touching the wearer's throat. From this viewpoint, the extension length q is preferably 70 mm or less, more preferably 65 mm or less, even more preferably 60 mm or less, and even more preferably 55 mm or less.

[0047] Here, when the extension lengths p, q of the eyebrow side joint 6a and the chin side joint 6b are 0 mm, this means that the eyebrow side joint 6a and the chin side joint 6b are approximately points, and when the length p of the eyebrow side joint 6a and the chin side joint 6b exceeds 0 mm, this means that the eyebrow side joint 6a and the chin side joint 6b extend along the width direction from the apex on the eyebrow or chin side of the face contact side end 5 (the upper end of the eyebrow side edge 5a or the lower end of the chin side edge 5b), and flat portions are formed at the eyebrow side end (upper end) and chin side end (lower end) of the mask body 2.

[0048] In this embodiment, the eyebrow side joint 6a and the chin side joint 6b each have an extension length p, q that exceeds 0 mm, and extend in the width direction from the upper end of the eyebrow side edge 5a or the lower end of the chin side edge 5b of the face-contacting end 5. The mask body 2 has an asymmetric shape in the up-down direction in which the extension length q of the chin side joint 6b is longer than the extension length p of the eyebrow side joint 6a. The eyebrow side joint 6a joins the first panel portion 10A and the second panel portion 10B over the entire extension direction.

[0049] The main joint 6c is formed in an arc shape extending in the vertical direction from the eyebrow side joint 6a to the chin side joint 6b. The main joint 6c has a non-joined area in a region corresponding to the mouth of the wearer, and the non-joined area is opened to form a breathing hole 6d. That is, the closed side end 6 has a breathing hole 6d in a region corresponding to the mouth of the wearer. Here, the "region corresponding to the mouth of the wearer" generally refers to a region closer to the chin than the center of the main joint 6c in the vertical direction.

[0050] As shown in Fig. 2, from the viewpoint of facilitating breathing, the vertical length H of the ventilation hole 6d is preferably 20 mm or more, more preferably 30 mm or more, even more preferably 40 mm or more, and even more preferably 50 mm or more. The vertical length H of the ventilation hole 6d is determined from the viewpoint of suppressing steam leakage. From this viewpoint, it is preferably 100 mm or less, more preferably 90 mm or less, even more preferably 85 mm or less, and even more preferably 80 mm or less.

[0051] [Sheet 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 be a single structure (single layer structure), or may be an integrated multi-layer structure in which a plurality of sheets are laminated. The sheet-like member forming the first panel portion 10A and the second panel portion 10B is preferably a multi-layer structure, since it is possible to impart various functions to the mask body 2 by imparting separate functions to the plurality of sheets. When a plurality of sheets are used, the sheets may be embossed or laminated, may be bonded entirely, or may be spaced apart from each other. In addition, when the sheets are spaced apart from each other, the sheets may be bonded to each other by sealing the edges of the sheets along the shape of the mask body 2, or may be bonded only by a part of the edges by point sealing.

[0052] 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 multi-layer 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 three-dimensional, and an outer sheet 16 that forms the outer surface when the panel portion 10A and the second panel portion 10B are three-dimensional. The inner sheet 14 and the outer sheet 16 are formed to have the same shape and size, and are laminated to form a single sheet having a multi-layer structure. As described above, instead of the configuration in which the first panel portion 10A and the second panel portion 10B each are made of a single sheet and mechanically joined together, the first panel portion 10A and the second panel portion 10B may be configured to be integrally formed from the beginning as a single sheet.

[0053] In the mask body 2 according to this embodiment, the water vapor generating body 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 water vapor generating body 20 is sandwiched between two or more sheets of nonwoven fabric. However, the present invention is not limited to this, and a pocket-shaped storage section may be provided on the inner surface of the mask body 2, and the water vapor generating body 20 may be attached and detached to the storage section, or the water vapor generating body 20 may be fixed to the inner surface of the mask body 2 using a fixing means such as an adhesive. In addition, the outer sheet 16 and the inner sheet 14 may be locally non-adhesive to form an opening and a storage space between the outer sheet 16 and the inner sheet 14, into which the water vapor generating body 20 can be inserted and detached.

[0054] An adhesive (not shown) is applied to the outer sheet 16, and the steam-generating unit 20 and the inner sheet 14 are bonded to each other via the adhesive. A hot-melt adhesive is preferably used as the adhesive, but 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.

[0055] The material of the inner sheet 14 and the outer sheet 16 can be any material that has been conventionally used in the technical field of face masks, and there is no particular limitation on the type as long as it has a certain level of breathability. For example, nonwoven fabric, woven fabric, fiber sheet such as paper, resin foam sheet, metal sheet, or a combination of these, etc. are used. Among them, nonwoven fabric is preferably used from the viewpoint of ease of processing and economic efficiency. As the fiber material of the nonwoven fabric, for example, one or more types of fibers selected from polyester such as PET (polyethylene terephthalate); polyolefin such as PE (polyethylene), PP (polypropylene), and ethylene propylene copolymer; rayon; cotton, etc. are preferable. In addition, the nonwoven fabric can be manufactured by the air-through method, spunbond method, needle punch method, melt blown method, card method, heat fusion method, hydroentanglement method, solvent adhesion method, etc. using fibers of one or more materials described above, and may be a single layer or a multilayer structure. The nonwoven fabric may be chemically treated depending on the purpose.

[0056] It is preferable that the inner sheet 14 is breathable from the viewpoint of allowing the diffused steam to act efficiently over the entire face of the user of the steam generator 1. On the other hand, the outer sheet 16 can be made of any material depending on the design of the product, and may be a breathable or non-breathable sheet, 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 due to a structure such as rubber knitting.

[0057] The inner sheet 14 and the outer sheet 16 may have a basis weight that is rigid enough to maintain a cylindrical shape with a bottom when worn. For the inner sheet 14, it is preferable to select a material that improves the feel on the skin, and for the outer sheet 16, it is preferable to select a material that is suitable for providing shape retention to the mask body 2.

[0058] Specifically, the basis weight of the inner sheet 14 is set to 5 g / m2 from the viewpoint of improving the thickness and sheet strength in a well-balanced manner. 2It 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 inner sheet 14 is 60 g / m2 or more from the viewpoint of efficiently supplying steam to the wearer. 2 It is preferable that the thickness is less than 50 g / m 2 More preferably, it is 40 g / m or less. 2 More preferably, it is 30 g / m or less. 2 Even more preferably, it is:

[0059] The thickness of the inner sheet 14 is preferably at least 5 μm, more preferably at least 10 μm, and even more preferably at least 20 μm. The thickness of the inner sheet 14 is preferably no more than 500 μm, more preferably no more than 450 μm, and even more preferably no more than 400 μm.

[0060] The basis weight of the outer sheet 16 is determined from the viewpoint of providing shape retention that stably maintains the shape of the mask body 2, stably holds the steam generating unit 20, and further sufficiently maintains the space inside the steam generator 1. From this viewpoint, the basis weight is set to 10 g / m 2 It is preferable that the thickness is 20 g / m or more. 2 More preferably, it is 30 g / m or more. 2 More preferably, it is 40 g / m or more. 2 It is even more preferable that the basis weight of the outer sheet 16 is 100 g / m2 or more in order to prevent the mask from shifting due to its weight and to ensure a comfortable fit. 2 It is preferable that the thickness is less than 90 g / m 2 More preferably, it is 80 g / m or less. 2 More preferably, it is 70 g / m or less. 2 Even more preferably, it is:

[0061] 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, part of which does not have air permeability. When an inner sheet 14 with an air permeability of 100 sec / 100 mL or less is used, water vapor from the steam-generating unit 20 can be efficiently discharged from the inner sheet 14.

[0062] Here, the air permeability can be measured as follows. 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 It is defined as the time it takes for air to pass through an area of ​​100 mm. Therefore, a large air permeability value means that it takes a long time for air to pass through, i.e., air permeability is low. Conversely, a small air permeability value means that air permeability is high. Thus, there is an inverse relationship between the air permeability value and the air permeability. Air permeability can be measured with an Oken air permeability meter. In this specification, an air permeability of 30,000 sec / 100 ml or more is considered to be "hard to breathe" and an air permeability of 80,000 sec / 100 ml or more is considered to be "non-breathable."

[0063] The mask body 2 having the above configuration is folded flat before use by folding the first panel portion 10A and the second panel portion 10B in half along the vertical center line (the closed side end portion 6). In this state, the mask body 2 can be made compact by folding the holding portion 30 inside the mask body 2 and storing it therein (see FIG. 6), as described later. On the other hand, when used, the mask body 2 is opened from the edge portion (the face-contacting end portion 5) opposite the vertical center line (the closed side end portion 6), and the mask body 2 is worn so that the inner side where the mask body 2 was folded faces the wearer. That is, the mask body 2 is configured such that when used, the face-contacting end portion 5 of the first panel portion 10A and the face-contacting end portion 5 of the second panel portion 10B are pulled away from each other, so that the closed side end portion 6 protrudes forward of the mask body 2 with the vertical center line as the center, forming a hollow, shape-retaining three-dimensional shape. Such a three-dimensionally formed mask body 2 has the advantage that the opening of the expanded face-contacting 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.

[0064] [Structure of holding part] The holding parts 30 are joined to both widthwise ends of the mask body 2, and serve to hold the mask body 2 on the wearer's face. An example of the holding parts 30 will be described below.

[0065] In this embodiment, the retaining parts 30 are ear hooks that can be attached to the wearer's ears, and are provided in pairs at the left and right ends in the longitudinal direction (width direction) of the mask body 2. As shown in Fig. 2, the retaining parts 30 have an ear hook main body 31, ear hook holes 32 through which the wearer's ears can be inserted, and a seal part 39 (see Fig. 6) that joins the mask body 2 and the ear hook main body 31.

[0066] The ear hook body 31 has an upper side, a lower side, an open edge on the open side of the holder 30 that is not joined to the mask body 2, and a joint edge that is joined to the holder joint part 5c of the face-contacting end part 5 of the mask body 2. In this embodiment, the ear hook body 31 is flat and has a roughly rectangular shape with rounded corners. Specifically, the upper side and the lower side are tapered from the joint edge toward the open edge, and the open edge is formed in an arc shape.

[0067] In this embodiment, the sum of the lengths (mm) of the pair of holding parts 30 parallel to the width direction of the mask body 2 is preferably equal to or less than the width (mm) of the mask body 2. In this embodiment, since the holding parts 30 are a pair, the length (mm) of one holding part 30 parallel to the width direction of the mask body 2 is smaller than the width (mm) of one mask body 2 bisected by the vertical center line (closed side end 6). This prevents the holding parts 30 from overlapping with the mask body 2 and being folded unnaturally inside the mask body 2, increasing the thickness, and preventing the holding parts 30 from getting tangled, and allows the steam generator 1 to be packed more compactly. In addition, as shown in FIG. 6, when the holding parts 30 are folded inside the mask body 2, the holding parts 30 are less likely to be contaminated, and hygiene can be further improved.

[0068] Furthermore, since the holding part 30 is smaller than the mask body 2, the mask body 2 is relatively large, and as a result, the internal space of the mask body 2 becomes spacious and wide when the steam generator 1 is worn. Therefore, it is possible to inhale sufficiently humidified air while reducing the breathlessness caused by humidification. This effect is particularly noticeable when the steam generator 20 actively releases warm humidity, for example, generates hot steam by the oxidation reaction of an oxidizable metal. The length of the holding part 30 parallel to the width direction of the mask body 2 refers to the state in which the holding part 30 is not extended and refers to the state before the steam generator 1 is used.

[0069] The holding part 30 may be made of the same material as the mask body 2 or a different material, but from the viewpoint of improving the fit of the mask body 2, it is preferable that the holding part 30 is made of a material having elasticity and is easy to stretch in the width direction of the mask body 2. In this embodiment, the holding part 30 is preferably made of a nonwoven fabric, and more preferably a nonwoven fabric having elasticity. From the viewpoint of binding with the mask body 2, it is preferable that the holding part 30 contains a thermoplastic resin as a constituent fiber. Furthermore, from the viewpoint of ease of processing, it is more preferable that the holding part 30 contains polypropylene. Note that the holding part 30 may further contain a thermoplastic resin other than polypropylene, and for example, it is preferable that the holding part 30 further contains one or more selected from the group consisting of urethane, polyethylene, and polyethylene terephthalate, and it is more preferable to use a synthetic fiber made of urethane. With such a configuration, the flexibility and fit of the holding part 30 can be efficiently expressed, and sufficient strength can be expressed when the steam generator 1 is used.

[0070] The retaining portion 30 is not limited to the flat ear loop described above, and may be any type that can be used for a mask, as long as it is capable of retaining the mask body 2 in front of the wearer's face. For example, various configurations such as an elastic ear loop 30' as shown in the first modified example in FIG. 12, or one or more bands spanning from the face-contacting end 5 of the first panel portion 10A to the face-contacting end 5 of the second panel portion 10B, may be adopted. The retaining portion 30 is not limited to a configuration of a separate member joined to both ends of the mask body 2 in the width direction, and may be formed integrally with the mask body 2. In the steam generator 1A according to the first modified example shown in FIG. 12, the same reference numerals as those in the steam generator 1 according to the present embodiment are used for configurations common to the steam generator 1 according to the present embodiment.

[0071] [Configuration of water vapor generator] The steam generator 20 is configured to generate heat and steam by reacting with oxygen in the air, and to supply the heated steam to the user. That is, the steam generator 20 according to the present embodiment is a hot steam generator configured to generate hot steam by the oxidation reaction of an oxidizable metal. The form of such a steam generator 20 can be, for example, 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 liquid or the like is applied to a substrate (see, for example, JP 2013-146555 A (JP 2012-279804 A)). In addition, the steam generator 20 preferably contains an oxidizable metal, a carbon component, and water.

[0072] The oxidizable metal is a metal that generates heat of oxidation reaction, and examples thereof include powders or fibers of one or more metals selected from iron, aluminum, zinc, manganese, magnesium, and calcium. Among them, iron is preferred from the viewpoints of handling, safety, production cost, storage property, 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.

[0073] The carbon component has at least one of the functions of water retention, oxygen supply, and catalytic activity, and preferably has all three of these functions. 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 from the viewpoint of easily absorbing oxygen when wet and maintaining a constant moisture content in the heating element.

[0074] The steam-generating unit 20 further contains a water-retaining material. There are no particular limitations on the type of water-retaining material as long as it is capable of retaining water, but it is preferable that the water-retaining material has excellent steam dissipation properties. Examples of the water-retaining material include one or more types selected from water-absorbent 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 steam-generating unit 20.

[0075] The planar shape of the steam generator 20 is not particularly limited, and may be a circle, a polygon, or the like. From the viewpoints of production efficiency, ease of handling, and heating and humidifying effect, a quadrangle such as a rectangle or an approximately square is preferable, and from the viewpoint of ease of handling, an approximately square is more preferable. In addition, for example, one or two or more steam generators 20 are preferably installed in the steam generator 1, preferably one or two or more are installed in each panel, and more preferably installed on both the left and right panels. The heat generation characteristics of the two steam generators 20 may be the same or different, but it is more preferable that they are the same.

[0076] Here, the structure of the steam generating unit 20 will be described in detail. As shown in FIG. 7, the steam generating unit 20 is a rectangular flat body, and has a heat generating layer 70 between the base layer 50 and the water retention layer 60. The first sheet 27 on the water retention layer side and the second sheet 80 on the base layer side are sealed in a closed space by joining the peripheral parts of the two sheets. In this way, the first sheet 27 on the water retention layer side and the second sheet 80 on the base layer side are in a bag shape, so that the amount of heat and steam can be appropriately adjusted. If the first sheet 27 has air permeability, the steam can be efficiently discharged to the user side. The heat generating layer 70 may be provided on one side of the water retention layer 60, or may be provided in a form sandwiched between the water retention layer 60 and the base layer 50. FIG. 7 shows an example in which the heat generating layer 70 is provided in a form sandwiched between the water retention layer 60 and the base layer 50.

[0077] An example of the steam generating unit 20 according to the present embodiment will be described in more detail with reference to FIG. 8. FIG. 8 shows the steam generating unit 20 according to the example, viewed from the surface that contacts the skin of the user. As shown in FIG. 8, the steam generating unit 20 according to the example is a rectangular flat body, and includes a base layer 50, a heat generating layer 70 laminated on the base layer, and a water retaining layer 60 laminated so that at least a part of the heat generating layer 70 is in contact with the heat generating layer 70. A heat transfer inhibiting region R1 that inhibits the transfer of heat generated from the heat generating layer 70 may be formed in a part of the planar direction of the heat generating layer 70 on the water retaining layer 60 side. By providing the heat transfer inhibiting region R1, appropriate heat supply is performed. As shown in FIG. 8, the steam generating unit 20 is sandwiched between a first sheet 27 on the water retaining layer 60 side and a second sheet 80 on the base layer side, and is sealed in a closed space by joining the peripheral parts of the two sheets 27, 80.

[0078] (Heat transfer inhibition area) In the steam-generating body 20 according to this embodiment, the heat transfer inhibiting region R1 is provided with a heat transfer inhibitor R1a that inhibits heat transfer over the entire region. As shown in FIG. 8, the heat transfer inhibitor R1a is laminated in the right half of the region in the planar direction of the heat generating layer. Meanwhile, the region (the left half) that is not the heat transfer inhibiting region R1 in the planar direction on the water retaining layer side of the heat generating layer is the non-heat transfer inhibiting region R2. Here, in this specification, the "heat transfer inhibiting region" refers to a region that inhibits the transfer of heat transferred to the water retaining layer 23 side. In this way, by providing the heat transfer inhibiting region R1 and the non-heat transfer inhibiting region R2, the amount of steam and temperature from the part that comes into contact with the skin can be appropriately adjusted.

[0079] In addition, the water vapor generating unit 20 is preferably disposed so that the heat transfer inhibiting region R1 is located at the portion where the mask body 2 touches the wearer's face (skin) and in the vicinity thereof. Specifically, the water vapor generating unit 20 is disposed so that the heat transfer inhibiting region R1 is located on the retaining part 30 side. In this way, by disposing the heat transfer inhibiting region R1 at the portion where the water vapor generating unit 20 of the mask body 2 touches the wearer's face (skin) and in the vicinity thereof, even if the amount of heat generated from the non-heat transfer inhibiting region R2 is increased, the heat is transferred to the wearer's face (skin) via the heat transfer inhibitor R1a of the heat transfer inhibiting region R1, so that the wearer's face (skin) is not excessively heated and uncomfortable.

[0080] The total cumulative amount of water vapor generated by the water vapor generating unit 20 during 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 800 mg or more, even more preferably 1200 mg or more, and even more preferably 1600 mg or more, from the viewpoint of efficiently filling the space with steam. Moreover, from the viewpoint of maintaining a comfortable temperature and easiness of breathing, 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 is intended to be the total amount (total) of all the water vapor generating units 20 installed in the mask body 2.

[0081] In the steam-generating unit 20 according to the present embodiment, the amount of steam generated from one cell in 10 minutes is preferably 200 mg or more, more preferably 300 mg or more, and even more preferably 400 mg or more. The amount of steam generated from one 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. By adopting such a form, the amount of steam generated from each cell can be appropriately adjusted according to the volume of the internal space 4 described later, and the steam generated from the cell does not become too hot, and appropriate steam and heat can be supplied to the skin of the user.

[0082] Here, it is preferable that the amount of steam generated for 10 minutes is appropriately adjusted according to the volume of the internal space 4 of the mask body 2. Specifically, the amount of steam generated for 10 minutes per unit volume is set to 1 mg / cm from the viewpoint of providing a sufficient steamy sensation. 3 It is preferable that the concentration is 2 mg / cm or more. 3 More preferably, it is 3 mg / cm or more. 3 More preferably, it is 4 mg / cm or more. 3 It is even more preferable that the amount of steam generated per unit volume for 10 minutes is an amount that allows the user to breathe comfortably, specifically, 10 mg / cm 3 Preferably, it is 9 mg / cm or less. 3 More preferably, it is 8 mg / cm or less. 3 More preferably, it is 7 mg / cm or less. 3 It is even more preferable that the steam generation amount is equal to or less than this. By setting the steam generation amount to this amount, it becomes possible to supply an appropriate amount of water vapor within the first 10 minutes after starting use of the steam generator 1, so that the effect of the steam can be provided more effectively.

[0083] [Water vapor generation measurement method] The 10-minute steam generation amount of the steam-generating unit 20 is a value measured as follows using the device 40 shown in Fig. 9. In the following description, the subject is a non-heat-generating steam-generating unit 20 sealed in an oxygen-barrier bag or the like, and the "start of heat generation time" is defined as the time required from starting to open the oxygen-barrier bag, etc., to bringing the steam-generating unit 20 into contact with an oxygen-containing atmosphere such as air, and placing the unit in the measuring device 40 shown in Fig. 9, in other words, 5 seconds after starting to open the bag. The device 40 shown in Fig. 9 includes an aluminum measurement chamber (volume 4.2 L) 41, an inflow passage 42 for introducing dehumidified air (humidity less than 2%, flow rate 2.1 L / min) into the lower part of the measurement chamber 41, an outflow passage 43 for discharging air from the upper part of the measurement chamber 41, an inlet thermo-hygrometer 44 and an inlet flowmeter 45 provided in the inflow passage 42, an outlet thermo-hygrometer 46 and an outlet flowmeter 47 provided in the outflow passage 43, and a thermometer (thermistor) 48 provided in the measurement chamber 41. The thermometer 48 has a temperature resolution of about 0.01°C. In this specification, the amount of steam generated refers to the total amount measured from the "start of heat generation" of the steam-generating body 20 until 10 minutes later.

[0084] The steam-generating unit 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 scope of the present invention. Specific examples of the aromatic hydrocarbons include terpene hydrocarbons such as myrcene, farnesene, pinene, limonene, camphene, phellandrene, terpinene, terpinolene, p-cymene, cedrene, and caryophyllene; aldehydes such as hexylcinnamic 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.

[0085] [How to use the steam generator] Next, a method of using the steam generator 1 according to this embodiment will be described. In this embodiment, since the steam generating unit 20 is integrated with the mask body 2, the entire steam generating device 1 is stored in a sealed state in an oxygen blocking bag. In this stored state, the mask body 2 is folded around the vertical center line with the holding portion 30 folded inward.

[0086] First, when putting on the device, the wearer opens the packaging bag and removes the steam generator 1 from the oxygen-blocking bag. This brings the steam-generating unit 20 into contact with air, and the oxidizable metal contained in the steam-generating unit 20 undergoes an oxidation reaction, causing the steam-generating unit 20 to start generating heat.

[0087] After removing the steam generator 1 from the oxygen barrier bag, the wearer opens the mask body 2, which is folded in half, from the face-contacting end 5 side, and removes the pair of holding parts 30 from inside the mask body 2. Then, as shown in Fig. 10, while the mask body 2 is placed against the face, the wearer pulls the holding parts 30 with his / her fingers and inserts the ears through the ear holes 32. By hooking the pair of holding parts 30 onto the left and right ears of the wearer in this way, the mask body 2 can be held on the wearer's face so that the entire face of the wearer is kept covered by the mask body 2, as shown in Fig. 11.

[0088] When the water vapor-generating element 20 generates heat while the entire face is covered by the mask body 2, the water contained in the water vapor-generating element 20 is heated by this heat and becomes water vapor (hot steam) at a predetermined temperature, which is released into the internal space 4 of the mask body 2 through the inner sheet 14 of the mask body 2 and supplied to the face of the wearer. In this way, the steam generator 1 according to this embodiment can supply hot steam to the wearer in a simple manner, providing beauty effects such as relieving skin troubles and a relaxing effect.

[0089] [Advantages of the steam generating device according to this embodiment] As described above, the steam generator 1 of this embodiment comprises a bottomed, cylindrical mask body 2 having an opening at the face-contacting end 5, and a water vapor generator 20 capable of generating steam in the internal space 4 of the mask body 2, the mask body 2 having a peripheral surface extending from the face-contacting end 5 toward the blocked end 6 so as to form an internal space 4 between the mask body 2 and the wearer's face, and the peripheral length of the opening at the face-contacting end 5 of the mask body 2 is 450 mm or more and 700 mm or less.

[0090] The steam generator 1 having such a configuration can be used as a three-dimensional face mask that covers the entire face, and can fill the internal space 4 formed in front of the face with steam generated by the water vapor generator 20, making it possible to supply steam evenly to the entire face. Therefore, the steam generator 1 according to this embodiment has the remarkable advantage that, even when equipped with a water vapor generator 20 that produces a large amount of steam, it provides just the right amount of comfort to the entire face, which is sensitive to temperature, and can provide excellent beauty and relaxation effects.

[0091] [Variations] Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above-mentioned embodiments. Various modifications and improvements can be made to the above-mentioned embodiments.

[0092] For example, in the above embodiment, the steam generator is a face mask type that can cover the entire face, but the present invention is not limited to this. For example, the steam generator can be used as a type that covers from the nose to the neck.

[0093] In the above-described embodiment, the mask body 2 has been described as having a first panel portion 10A and a second panel portion 10B, and is configured to be deformable from a folded bag shape to a three-dimensional cylindrical shape with a bottom, but this is not limited to this and the shape may be retained in advance.

[0094] 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 portion 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 which is integrally continuous along the vertical center line and locally joining the discontinuous portions.

[0095] In the above embodiment, the eyebrow side edge 5a and the chin side edge 5b of the face-contacting end 5 are inclined in directions away from each other toward the closed end 6, but the present invention is not limited to this, and only one of the eyebrow side edge 5a and the chin side edge 5b may be inclined, or neither the eyebrow side edge 5a nor the chin side edge 5b may be inclined. Moreover, the eyebrow side edge 5a and the chin side edge 5b are not limited to being linearly extended, and various shapes that are any combination of straight lines, curved lines, arcs, etc. may be adopted.

[0096] Furthermore, the retainer joint 5c is not limited to a linear configuration extending in the vertical direction, but may be configured to extend in a direction inclined relative to the vertical direction, and may adopt various shapes that are any combination of straight lines, curved lines, arcs, etc. In the above-mentioned embodiment, the brow side joint 6a and the chin side joint 6b are formed to be perpendicular to the retainer joint 5c, but this is not limited thereto, and one or both of the brow side joint 6a and the chin side joint 6b may be inclined relative to the retainer joint 5c.

[0097] In the above-mentioned embodiment, both the eyebrow side joint 6a and the chin side joint 6b extend along the width direction, and flat portions are formed at the eyebrow side end and the chin side end of the mask body 2. However, the present invention is not limited to this. For example, as in the second modified example shown in FIG. 13 and the third modified example shown in FIG. 14, a flat portion is formed only at either the eyebrow side end or the chin side end of the mask body 2 (the extension length p, q of either the eyebrow side joint 6a or the chin side joint 6b is 0 mm), or as in the fourth modified example shown in FIG. 15 and the fifth modified example shown in FIG. 16, a flat portion is not formed at either the eyebrow side end or the chin side end of the mask body 2 (the extension length p, q of the eyebrow side joint 6a and the chin side joint 6b is 0 mm). In addition, in the steam generators 1B, 1C, 1D, and 1E of the second to fifth modified examples shown in Figures 13 to 16, components that differ from the steam generator 1 of this embodiment are marked with an "'" and components that are in common are marked with the same symbols as the steam generator 1 of this embodiment.

[0098] In the above-described embodiment, the main joint 6c is described as being formed in an arc shape, but this is not limited to this, and as long as an internal space 4 can be formed between the wearer's face and the main joint 6c, various shapes can be adopted that arbitrarily combine straight lines, curved lines, arcs, etc., as in the third modified example shown in FIG. 14 and the fifth modified example shown in FIG. 16.

[0099] In the above-described embodiment, the breathing hole 6d is provided in the area of ​​the closed side end 6 (main joint 6c) corresponding to the wearer's mouth, but this is not limited thereto, and the breathing hole 6d may be formed in an area other than the closed side end 6 (for example, the peripheral surface of the mask body 2), or the breathing hole 6d may not be provided.

[0100] In the above-described embodiment, the mask body 2 has been described as having a vertically asymmetric shape, but this is not limited thereto. For example, as in the fourth modified example shown in FIG. 15, the mask body 2 may have a vertically symmetric shape with respect to a horizontal line passing through the center of the mask body 2 in the vertical direction.

[0101] In the above-described embodiment, the mask body 2 is described as having a holding portion 30 for holding the mask body 2 in front of the wearer's face, but this is not limited thereto, and the mask body 2 may be configured not to have a holding portion 30, i.e., the face-contacting end portion 5 of the mask body 2 may be fitted onto the wearer's face, or the mask body 2 may be placed on the wearer's face.

[0102] In the above-described embodiment, the water vapor generator 20 is described as generating hot steam through an oxidation reaction of an oxidizable metal, but this is not limited to this, and various optional configurations can be adopted, such as a configuration in which a filter that retains moisture can be humidified by heating it in a microwave oven or the like before use.

[0103] In the above embodiment, two water vapor generating bodies 20 are provided on each of the first panel portion 10A and the second panel portion 10B, but the present invention is not limited thereto. For example, one or three or more water vapor generating bodies 20 may be provided on each of the first panel portion 10A and the second panel portion 10B, or the water vapor generating body 20 may be provided on only one of the first panel portion 10A and the second panel portion 10B. The water vapor generating body 20 is not limited to being contained in the first panel portion 10A and the second panel portion 10B, but may be provided in a pocket-shaped storage portion on the inner surface of the mask body 2, and the water vapor generating body 20 may be attached and detached to the storage portion, or the water vapor generating body 20 may be fixed to the inner surface of the mask body 2 using a fixing means such as an adhesive. Furthermore, in the type in which the water vapor generating body 20 is attached to the mask body 2 later, the water vapor generating body 20 alone may be stored in a sealed state in an oxygen blocking bag. When multiple steam generating bodies 20 are provided, the steam characteristics and shapes of each body may be the same or different, but from the viewpoint of uniformly supplying steam and fragrance to the wearer, it is preferable that they have the same shape and the same steam characteristics.

[0104] It is apparent from the claims that the above-mentioned modifications are included within the scope of the present invention.

[0105] In relation to the above-mentioned embodiment, the present invention further discloses the following steam generating device.

[0106] <1> A steam generator comprising a bottomed, cylindrical mask body having an opening at a face-contacting end, and one or more water vapor generators capable of generating steam in the internal space of the mask body, wherein the mask body has a peripheral surface extending from the face-contacting end to a closed end located opposite the face-contacting end so as to form the internal space between the mask body and the wearer's face, and the peripheral length of the opening at the face-contacting end of the mask body is 450 mm or more and 700 mm or less.

[0107] <2> The face-contacting end of the mask body is configured to form an opening large enough to cover the entire face of the wearer when the mask body is in a bottomed cylindrical shape. <1> The steam generating device described in

[0108] <3> The perimeter of the opening at the face-contacting end of the mask body is preferably 450 mm or more, more preferably 460 mm or more, even more preferably 480 mm or more, and even more preferably 500 mm or more, from the viewpoint of covering the entire face of the wearer, and is preferably 700 mm or less, more preferably 670 mm or less, even more preferably 630 mm or less, and even more preferably 600 mm or less, from the viewpoint of reducing a gap with the wearer's face and reducing steam leakage. <1> or <2> The steam generating device described in

[0109] <4> The mask body includes a first panel portion that forms a half of the circumferential surface of the mask body, and a second panel portion that forms the remaining half of the circumferential surface. The first panel portion and the second panel portion are formed in a bag shape with edges joined to each other except for the face-contacting end portion, and are configured to be deformable into the bottomed tubular shape by expanding an opening of the face-contacting end portion. <1> ~ <3> 13. A steam generating device according to any one of claims 1 to 12.

[0110] <5> In the face-contacting end portion, in the bag-shaped state in which the first panel portion and the second panel portion are overlapped, an eyebrow side edge portion arranged on the eyebrow side of the wearer and a chin side edge portion arranged on the chin side of the wearer are inclined in directions away from each other toward the closed side end portion. <1> ~ <4> 13. A steam generating device according to any one of claims 1 to 12.

[0111] <6> The inclination angle of the chin-side edge is 5° or more and 80° or less, and the sum of the inclination angle of the eyebrow-side edge and the inclination angle of the chin-side edge is 30° or more and 160° or less. <1> ~ <5> 13. A steam generating device according to any one of claims 1 to 12.

[0112] <7> The inclination angle of the chin-side edge is preferably 0° or more, more preferably 5° or more, even more preferably 10° or more, and even more preferably 15° or more, from the viewpoint of fitting the mask to the inclination of the chin and the side of the face line of the wearer, and is preferably 90° or less, more preferably 80° or less, even more preferably 70° or less, and even more preferably 60° or less, from the viewpoint of maintaining the shape of the mask body in a cylindrical shape with a bottom and forming a sufficient internal space between the mask body and the wearer's face. <1> ~ <6> 13. A steam generating device according to any one of claims 1 to 12.

[0113] <8> The inclination angle of the eyebrow side edge is preferably 0° or more, more preferably 10° or more, even more preferably 20° or more, and even more preferably 30° or more, from the viewpoint of fitting the mask body to the inclination of the forehead side of the wearer, and is preferably 90° or less, more preferably 80° or less, even more preferably 70° or less, and even more preferably 60° or less, from the viewpoint of maintaining the shape of the mask body in a cylindrical shape with a bottom and forming a sufficient internal space between the mask body and the face of the wearer. <1> ~ <7> 13. A steam generating device according to any one of claims 1 to 12.

[0114] <9> The sum of the inclination angle of the eyebrow-side edge and the inclination angle of the chin-side edge is set to be preferably 30° or more, more preferably 35° or more, even more preferably 40° or more, and even more preferably 50° or more, from the viewpoint of fitting the mask body to the inclination of the forehead, chin, or side of the face line of the wearer, and is preferably 160° or less, more preferably 145° or less, even more preferably 130° or less, and even more preferably 120° or less, from the viewpoint of maintaining the shape of the mask body in a cylindrical shape with a bottom and forming a sufficient internal space between the mask body and the face of the wearer. <1> ~ <8> 13. A steam generating device according to any one of claims 1 to 12.

[0115] <10> The closed side end portion has an eyebrow side joint portion that joins the eyebrow side end portions of the first panel portion and the second panel portion, and a chin side joint portion that joins the chin side end portions of the first panel portion and the second panel portion. <1> ~ <9> 13. A steam generating device according to any one of claims 1 to 12.

[0116] <11> From the viewpoints of maintaining good handling properties in the production process and good appearance, the extension length p of the joining region along the width direction of the eyebrow-side joining portion is preferably 0 mm or more, more preferably 3 mm or more, even more preferably 7 mm or more, and even more preferably 10 mm or more. From the viewpoints of maintaining good fit to the forehead of the wearer and good appearance, the extension length p is preferably 70 mm or less, more preferably 65 mm or less, even more preferably 60 mm or less, and even more preferably 55 mm or less. <1> ~ <10> 13. A steam generating device according to any one of claims 1 to 12.

[0117] <12> From the viewpoint of preventing the chin-side joint portion from slipping off the wearer's face, the extension length q of the joint region along the width direction is preferably 0 mm or more, more preferably 10 mm or more, even more preferably 20 mm or more, and even more preferably 30 mm or more. From the viewpoint of preventing the mask body from hitting the wearer's throat, the extension length q is preferably 70 mm or less, more preferably 65 mm or less, even more preferably 60 mm or less, and even more preferably 55 mm or less. <1> ~ <11> 13. A steam generating device according to any one of claims 1 to 12.

[0118] <13> Further comprising one or more holding portions for holding the mask body in front of the wearer's face. <1> ~ <12> 13. A steam generating device according to any one of claims 1 to 12.

[0119] <14> The mask body is held in the bottomed cylindrical shape, and the volume of the internal space when attached to a volume measurement human head model is 150 cm 3 More than 400cm 3 Is less than or equal to <1> ~ <13> 13. A steam generating device according to any one of claims 1 to 12.

[0120] <15> The mask body is maintained in the bottomed cylindrical shape, and the volume of the internal space when the mask body is attached to a volume measurement human head model is set to 150 cm from the viewpoint of distributing hot steam evenly over the entire face while maintaining good handling and appearance. 3 It is preferable that the height is 180cm or more. 3 More preferably, it is 220 cm or more. 3 More preferably, it is 250 cm or more. 3 It is even more preferable that the thickness is 400 cm or more. Also, from the viewpoint of facilitating breathing and maintaining good handling and appearance, it is preferable that the thickness is 400 cm or more. 3 It is preferable that the length is less than 370 cm. 3 More preferably, it is 330 cm or less. 3 More preferably, it is 300 cm or less. 3It is even more preferred that <1> ~ <14> 13. A steam generating device according to any one of claims 1 to 12.

[0121] <16> The volumetric head model is a female head model (width 151.24 mm, depth 206.82 mm, height 233.01 mm) created based on average female head data (latest data as of September 10, 2020) produced by Digital Human Technology Co., Ltd. <1> ~ <15> 13. A steam generating device according to any one of claims 1 to 12.

[0122] <17> The volume of the internal space is measured by using the volume measurement human head model, reproducing the state in which the steam generating device is used, and converting the data into three-dimensional data using a three-dimensional measuring machine. <1> ~ <16> 13. A steam generating device according to any one of claims 1 to 12.

[0123] <18> When the steam generator is held in a cylindrical shape with a bottom (when attached to a volumetric head model), the length Lopen in the vertical direction from the apex on the eyebrow side to the apex on the chin side of the face-contacting end is preferably 150 mm or more, more preferably 175 mm or more, even more preferably 190 mm or more, still more preferably 210 mm or more, and preferably 260 mm or less, more preferably 230 mm or less, and even more preferably 220 mm or less. <1> ~ <17> 13. A steam generating device according to any one of claims 1 to 12.

[0124] <19> In the steam generator, when the shape of a bottomed cylinder is maintained (when the steam generator is attached to a volumetric head model), the opening width between the face-contacting end of the first panel portion and the face-contacting end of the second panel portion (opening width when the shape is maintained) is preferably 100 mm or more, more preferably 120 mm or more, and even more preferably 130 mm or more, and is preferably 180 mm or less, more preferably 160 mm or less, and even more preferably 150 mm or less. <1> ~ <18> 13. A steam generating device according to any one of claims 1 to 12.

[0125] <20> When the steam generator is held in a cylindrical shape with a bottom (when attached to a volumetric head model), the depth Dopen along the width direction from the face-contacting end to the occluded end is preferably 70 mm or more, more preferably 80 mm or more, and even more preferably 90 mm or more, and is preferably 120 mm or less, more preferably 110 mm or less, and even more preferably 90 mm or less. <1> ~ <19> 13. A steam generating device according to any one of claims 1 to 12.

[0126] <21> The mask body has an inner surface area (reverse surface area) of 300 cm when it is held in the cylindrical shape with a bottom, from the viewpoint of forming a sufficient internal space between the mask body and the face of the wearer and distributing hot steam evenly over the entire face. 2 More than 350cm is preferable. 2 It is more preferable that the thickness is 600 cm or more. Also, from the viewpoint of minimizing the gap between the face of the wearer and the mask and minimizing the leakage of steam, it is preferable that the thickness is 600 cm or more. 2 Preferably, it is less than 550 cm 2 It is more preferable that <1> ~ <20> 13. A steam generating device according to any one of claims 1 to 12.

[0127] <22> The mask body has an asymmetrical shape, with the eyebrow side joint and the chin side joint both extending along the width direction, and the main joint formed in an arc shape, and the mask body has a back surface area of ​​500 cm 2 More than 600cm 2 It is preferable that <1> ~ <21> 13. A steam generating device according to any one of claims 1 to 12.

[0128] <23> The mask body has a main joint portion formed in an arc shape, a vertically symmetrical shape (dome shape), and a back surface area of ​​300 cm 2 More than 400cm 2It is preferable that <1> ~ <21> 13. A steam generating device according to any one of claims 1 to 12.

[0129] <24> The closed end has a breathing hole in an area corresponding to the wearer's mouth. <1> ~ <23> 13. A steam generating device according to any one of claims 1 to 12.

[0130] <25> From the viewpoint of facilitating breathing, the length H of the breathing hole in the vertical direction is preferably 20 mm or more, more preferably 30 mm or more, even more preferably 40 mm or more, and even more preferably 50 mm or more, and from the viewpoint of suppressing steam leakage, it is preferably 100 mm or less, more preferably 90 mm or less, even more preferably 85 mm or less, and even more preferably 80 mm or less. <1> ~ <24> 13. A steam generating device according to any one of claims 1 to 12.

[0131] <26> The steam generator generates hot steam by an oxidation reaction of an oxidizable metal. <1> ~ <25> 13. A steam generating device according to any one of claims 1 to 12.

[0132] <27> The water vapor generating element preferably contains an oxidizable metal, a carbon component and water. <1> ~ <26> 13. A steam generating device according to any one of claims 1 to 12.

[0133] <28> The steam generating unit includes a base layer, a heat generating layer laminated on the base layer, and a water retaining layer laminated so that at least a portion of the water retaining layer is in contact with the heat generating layer. A heat transfer inhibiting region that inhibits transfer of heat generated from the heat generating layer is formed in a portion of the heat generating layer in a planar direction on the water retaining layer side. <1> ~ <27> 13. A steam generating device according to any one of claims 1 to 12.

[0134] <29> The water vapor generating unit is preferably installed so that the heat transfer inhibiting region is located at or near the portion where the mask body comes into contact with the wearer's face (skin). <1> ~ <28> 13. A steam generating device according to any one of claims 1 to 12.

[0135] <30> The one or more water vapor generating units have a total steam generation rate per unit volume of 10 minutes of 1 mg / cm 3 More than 10mg / cm 3 Is less than or equal to <1> ~ <29> 13. A steam generating device according to any one of claims 1 to 12.

[0136] <31> The one or more steam-generating units should have a total steam generation amount per unit volume for 10 minutes of 1 mg / cm from the viewpoint of providing a sufficient feeling of steam. 3 It is preferable that the concentration is 2 mg / cm or more. 3 More preferably, it is 3 mg / cm or more. 3 More preferably, it is 4 mg / cm or more. 3 More preferably, the amount is equal to or more than 10 mg / cm. Also, the amount is preferably such that the user can breathe easily. Specifically, the amount is preferably 10 mg / cm. 3 Preferably, it is 9 mg / cm or less. 3 More preferably, it is 8 mg / cm or less. 3 More preferably, it is 7 mg / cm or less. 3 It is even more preferred that <1> ~ <30> 13. A steam generating device according to any one of claims 1 to 12.

[0137] <32> The one or more steam-generating bodies preferably have a total cumulative amount of steam generated (10-minute steam generation amount) released for 10 minutes from the start of steam generation of 160 mg or more, from the viewpoint of efficiently filling the space with steam, and more preferably have a total cumulative amount of steam generated (10-minute steam generation amount) of 160 mg or more, ... from the viewpoint of maintaining a comfortable temperature and easiness of breathing, and more preferably have a total cumulative amount of steam generated (10-minute steam generation amount) of 2400 mg or less, more preferably have a total cumulative amount of steam generated (2200 mg or less, more preferably have a total cumulative amount of steam generated (2000 mg or less, and even more preferably have a total cumulative amount of steam generated (1600 mg or less), from the viewpoint of maintaining a comfortable temperature and easiness of breathing, <1> ~ <31> 13. A steam generating device according to any one of claims 1 to 12.

[0138] <33> The steam generating amount of the water vapor generating unit per 10 minutes from one cell is preferably 200 mg or more, more preferably 300 mg or more, and even more preferably 400 mg or more, and 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. <1> ~ <32> 13. A steam generating device according to any one of claims 1 to 12. [Explanation of symbols]

[0139] 1, 1A~1E: Steam generator 2: Mask body 4: Interior space 5: Face contact end 5a: Eyebrow edge 5b: Jaw edge 5c: Holding part joint 6: Closed end 6a: Eyebrow side joint 6b: Jaw side joint 6c: Main joint 6d: Breathing hole 10A: First panel section 10B: Second panel section 14: Inner sheet 16: Outer sheet 20: Steam generator 27: First sheet 30: Holding part 31: Ear hook body 32: Ear holes 39: Seal part 40: Equipment 41:Measurement room 42:Inflow channel 43:Outflow channel 44: Inlet temperature and humidity meter 45:Inlet flow meter 46: Outlet temperature and humidity meter 47: Outlet flow meter 48:Thermometer R1: Heat transfer inhibition region R1a: Heat transfer inhibitors R2: Non-heat transfer inhibiting region

Claims

1. A steam generator comprising a mask body having a bottomed cylindrical shape with an opening at a face-contacting end, and one or more water vapor generators capable of generating steam in an internal space of the mask body, the mask body has a peripheral surface extending from the face-contacting end to a blocking end located on the opposite side to the face-contacting end so as to form the internal space between the mask body and a face of a wearer, The perimeter of the opening at the face-contacting end of the mask body is 450 mm or more and 700 mm or less, The mask body includes a first panel portion that forms a semi-circumferential surface of the mask body, and a second panel portion that forms the remaining semi-circumferential surface of the mask body. the first panel portion and the second panel portion are formed in a bag shape in which edges except for the face-contacting end portion are joined to each other, and the first panel portion and the second panel portion are configured to be deformable into the bottomed tubular shape by expanding an opening of the face-contacting end portion, the face-contacting end portion is inclined in a direction such that an eyebrow-side edge portion arranged on the eyebrow side of the wearer and a chin-side edge portion arranged on the chin side of the wearer are separated from each other toward the closed-side end portion when the first panel portion and the second panel portion are overlapped to form the bag-like shape, the closed side end portion has a jaw side joining portion that joins jaw side ends of the first panel portion and the second panel portion, The face-contacting end portion is configured such that a chin-side apex is positioned under the chin of a wearer when the mask body is worn, The chin-side joint portion is configured to extend from the chin-side apex of the face-contacting end portion toward the front of the wearer. Steam generator.

2. The inclination angle of the jaw side edge is 5° or more and 80° or less, The sum of the inclination angle of the eyebrow-side edge and the inclination angle of the chin-side edge is equal to or greater than 30° and equal to or less than 160°. The steam generating device according to claim 1.

3. 3. The steam generator according to claim 1, wherein the closed side end further comprises an eyebrow side joint portion that joins the eyebrow side ends of the first panel portion and the second panel portion.

4. The eyebrow side joint portion is configured to extend from the brow side apex of the face-contacting end portion toward the front of the wearer. The steam generating device according to claim 3.

5. Further comprising one or more holding portions for holding the mask body in front of the wearer's face. The steam generator according to any one of claims 1 to 4.

6. The mask body is held in the bottomed cylindrical shape, and the volume of the internal space when attached to a volume measurement human head model is 150 cm ３ More than 400cm ３ is less than or equal to The steam generator according to any one of claims 1 to 5.

7. The steam generator generates hot steam by an oxidation reaction of an oxidizable metal. The steam generator according to any one of claims 1 to 6.

8. The one or more water vapor generating bodies have a total steam generation rate per unit volume of 10 minutes of 1 mg / cm ３ 10mg / cm or more ３ is less than or equal to The steam generator according to any one of claims 1 to 7.

9. The mask body has an inner surface area of ​​300 cm 2 or more and 600 cm 2 or less. The steam generating device according to any one of claims 1 to 8.

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