Health footwear

Abstract

This product provides health footwear that is suitable for storage and transport when not in use, and that can stimulate the instep of the foot with pressure. [Solution] The health footwear 1 has a sole plate portion 11 that supports the sole of the foot, and an instep belt 13 whose base end portion 12 is integrally formed with the sole plate portion 11 and whose tip portion 14 is detachably fastened to the sole plate portion 11. The sole plate portion 11 has a first cavity 31, and the instep belt 13 has a second cavity 32 and a plurality of protrusions 17 provided on the inner surface facing the instep. The second cavity 32 communicates with the first cavity 31 at the base end portion 12 of the instep belt 13. Furthermore, the health footwear 1 is configured to be deformable between a state of use and a state in which the entire structure is in the form of a single sheet.

Description

【Technical Field】 【0006】 , , 【0001】 The present invention relates to a health footwear capable of pressing and stimulating the instep of the foot. 【Background Art】 【0002】 As health footwear such as so-called health sandals, there are known ones that stimulate the sole of the foot by providing a plurality of protrusions on the upper surface of the bottom plate. Further, in Patent Document 1, it has been proposed to provide a plurality of protrusions on the inner surface of the instep belt for health footwear having an instep belt. 【0003】 The health footwear of Patent Document 1 has cavities formed in both the bottom plate and the instep belt, and has a structure in which the cavities communicate with each other. And when walking wearing the footwear, since the bottom plate portion at the toe is strongly pressed, the air in the cavity at that bottom plate portion is pushed and moves to the cavity of the instep belt. As a result, the cavity of the instep belt swells, and an effect of pressing and stimulating the instep of the foot by the protrusions of the instep belt is intended to be obtained. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Patent Laid-Open No. 11-178605 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 However, in the above Patent Document 1, it is premised on the form of ordinary footwear such as shoes and boots, and since the outer shape of the footwear is bulky, a large storage space is required when not in use, and there is a problem that it is difficult to carry when moving such as traveling. 【0006】 Furthermore, this only assumes a type of health footwear in which the curved instep strap is integrally formed with the sole plate. In this case, if there is a relatively large gap between the inner surface of the instep strap and the instep of the foot, even if the cavity of the instep strap expands, there is a problem in that it is difficult to reliably apply pressure and stimulate the instep of the foot. 【0007】 The present invention has been made in view of the above, and its purpose is to provide health footwear that is suitable for storage and transport when not in use, and that can stimulate the instep of the foot by applying pressure. [Means for solving the problem] 【0008】 The health footwear according to the present invention comprises a sole plate portion that supports the sole of the foot, and an instep belt whose base end is integrally formed with the sole plate portion, extends along the instep of the foot when worn on the foot, and whose tip is configured to be detachably attached to the sole plate portion directly or indirectly. The sole plate portion has a first cavity, and the instep belt has a second cavity and a plurality of protrusions provided on the inner surface facing the instep, the second cavity is in communication with the first cavity at the base end of the instep belt, and the footwear is configured to be transformable between a state of use in which the tip of the instep belt is attached directly or indirectly to the sole plate portion and a state of unfolding in which the sole plate portion and the instep belt are arranged in a planar manner and the entire health footwear is in the form of a single sheet, and the first cavity has a toe side cavity and a heel side cavity The device includes a first communication passage connecting the toe-side cavity and the heel-side cavity, a second communication passage connecting the toe-side cavity and the second cavity, and a third communication passage connecting the heel-side cavity and the second cavity, which is narrower than the first communication passage. The first communication passage is provided with a first check valve that allows air to move from the heel-side cavity to the toe-side cavity, and the second communication passage is provided with a second check valve that allows air to move from the toe-side cavity to the second cavity. 【0009】 Furthermore, the health footwear according to the present invention comprises a sole plate portion that supports the sole of the foot, and an instep belt whose base end is integrally formed with the sole plate portion, extends along the instep of the foot when worn on the foot, and whose tip portion is configured to be detachably attached to the sole plate portion directly or indirectly, wherein the sole plate portion has a first cavity, the instep belt has a second cavity and a plurality of protrusions provided on the inner surface facing the instep, the second cavity is in communication with the first cavity at the base end of the instep belt, and the footwear is configured to be transformable between a state of use in which the tip portion of the instep belt is attached directly or indirectly to the sole plate portion and a state of unfolding in which the sole plate portion and the instep belt are arranged in a planar manner and the entire health footwear becomes a single sheet-like structure. The first cavity is ,feet Front cavity and heel It includes a side cavity, and the bottom plate portion is the first cavity The aforementioned Cavity on the toe side and The aforementioned It has a shielding portion that separates the heel side cavity, and the toe side cavity and the heel side cavity are in communication with each other through the second cavity by communicating with the second cavity, respectively. [Effects of the Invention] 【0010】 According to the present invention, when the footwear is worn and weight is shifted, the first cavity in the soleplate is partially and strongly pressed, causing the air in the pressed area to move from the first cavity through the base end of the instep belt to the second cavity. The second cavity then expands, and a projection provided on the inner surface of the instep belt presses and stimulates the instep. Subsequently, as the pressure on the soleplate decreases in accordance with the weight shift, the air in the second cavity returns to the first cavity in the soleplate, and the pressure stimulation on the instep is alleviated. As this series of pressing actions is repeated in accordance with walking, blood circulation in the feet improves and acupressure points on the instep are repeatedly pressed, thus promoting and maintaining health. 【0011】 In addition, the entire health footwear is designed to be transformable into a single sheet-like structure, eliminating the need for large storage spaces when not in use and making it easy to carry when traveling. In other words, it provides health footwear that is also suitable for storage and transport when not in use. 【0012】 Furthermore, the tip of the sheet-like instep belt is detachably attached to the base plate, and the attachment position of the tip of the instep belt to the base plate can be changed. This ensures that even if the thickness of the instep varies from user to user, the protrusions on the inner surface of the instep belt can reliably contact the instep. Therefore, it is possible to reliably and repeatedly apply pressure to acupressure points on the instep of different users' feet. 【0013】 Furthermore, by providing a first check valve in the first connecting passage between the toe-side cavity and the heel-side cavity, and a second check valve in the second connecting passage between the toe-side cavity and the second cavity, when the center of gravity shifts to the heel, the air in the heel-side cavity moves to the toe-side cavity and is collected. Then, when the center of gravity shifts to the toes, the air collected in the toe-side cavity moves to the second cavity, inflating the instep belt and moving to the heel-side cavity. This allows the protrusions of the instep belt to protrude forcefully, thereby increasing the pressure stimulation effect on the instep. 【0014】 Furthermore, if the first cavity is separated into a toe-side cavity and a heel-side cavity, and each is connected to a second cavity, when the center of gravity shifts to the heel, the air in the heel-side cavity moves to the second cavity, inflating the instep belt and moving to the toe-side cavity. Then, when the center of gravity shifts to the toes, the air in the toe-side cavity moves to the second cavity, inflating the instep belt and moving to the heel-side cavity. In this way, the protrusions on the instep belt perform two pressing actions for each stepping motion of the foot, thereby further enhancing the pressing stimulation effect on the instep. [Brief explanation of the drawing] 【0015】 [Figure 1] Figure 1 is a perspective view showing the appearance of the health footwear. [Figure 2]FIG. 2 is a plan view showing the deployed state of the health footwear in Embodiment 1. [Figure 3] FIG. 3 is a cross-sectional view showing a cross-section in the width direction of the health footwear in Embodiment 1. [Figure 4] FIG. 4 is a cross-sectional view showing a state where the upper belt is tightly fastened with respect to FIG. 3. [Figure 5] FIG. 5 is a plan view showing the deployed state of the health footwear in Embodiment 2. [Figure 6] FIG. 6 is a plan view showing the deployed state of the health footwear in Embodiment 3. [Figure 7] FIG. 7 is an explanatory view schematically showing the check valve in the open state in Embodiment 3. [Figure 8] FIG. 8 is an explanatory view schematically showing the check valve in the closed state in Embodiment 3. 【MODE FOR CARRYING OUT THE INVENTION】 【0016】 Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Note that the present invention is not limited to the following embodiments. 《Embodiment 1》 【0017】 FIG. 1 is a perspective view showing the appearance of the health footwear 1 in Embodiment 1. FIG. 2 is a plan view showing the deployed state of the health footwear 1. FIGS. 3 and 4 are cross-sectional views showing a cross-section in the width direction of the health footwear 1. 【0018】 In Embodiment 1, the health footwear 1 has a bottom plate portion 11 that supports the sole and an upper belt 13 whose base end portion 12 is integrally formed with the bottom plate portion 11. The health footwear 1 may be footwear such as sandals and slippers, for example. 【0019】 The upper belt 13 extends in the width direction of the health footwear 1 along the instep from the base end portion 12 in the state of being worn on the foot, and the tip end portion 14 is configured to be detachably fastened directly or indirectly to the bottom plate portion. 【0020】 As shown in Figures 1 to 4, the health footwear 1 of this embodiment 1 further includes a belt fastening portion 15. That is, the base end portion 12 of the instep belt 13 is integrally formed on one side of the sole plate portion 11, while the belt fastening portion 15 is integrally formed on the other side of the sole plate portion 11. With the instep belt 13 positioned to cover the instep of the foot, the belt fastening portion 15 is designed to detachably fasten the tip portion 14 of the instep belt 13. In other words, in this embodiment 1, the tip portion 14 of the instep belt 13 is indirectly fastened to the sole plate portion 11. However, the present invention is not limited to this, and the tip portion 14 of the instep belt 13 may be directly fastened to the sole plate portion 11 without providing the belt fastening portion 15. 【0021】 The health footwear 1 is configured to be transformable between the usage state shown in Figure 1 and the unfolded state shown in Figure 2. In the usage state, the tip of the instep strap is fastened directly or indirectly to the sole plate. In other words, it is in a state in which the user can use the health footwear 1. On the other hand, in the unfolded state, the sole plate 11 and the instep strap 13 are arranged in a planar manner, and the entire health footwear 1 becomes a single sheet. In this embodiment 1, the health footwear 1 in the unfolded state becomes a single sheet with the sole plate 11, the instep strap 13 and the strap fastening part 15 arranged in a planar manner. 【0022】 The sheet-like health footwear 1 has a first layer 21 on the front side and a second layer 22 on the back side laminated to the first layer 21. The first layer 21 can be formed from a synthetic resin material such as EVA. Multiple protrusions 17 are formed on the surface of the first layer 21. Multiple protrusions 17 are formed across both the sole plate portion 11 and the instep belt 13. As a result, when the health footwear 1 is in use, the multiple protrusions 17 protrude inward from the health footwear 1. Therefore, on the instep belt 13, multiple protrusions 17 are arranged on the inner surface facing the instep of the foot. On the other hand, no protrusions 17 are provided on the belt fastening portion 15. In this embodiment 1, "protrusion" is a concept that includes convex portions having a relatively wide protruding surface. 【0023】 The second layer 22 can be made of, for example, a hook-and-loop fastener. In this case, it is preferable that the outer surface of the second layer 22 be made of the loop surface (so-called B surface) of the hook-and-loop fastener. The loop surface is a surface on which a large number of loops are formed. On the other hand, the belt fastening portion 15 is provided with the hook surface 18 (so-called A surface) of the hook-and-loop fastener, as shown in Figure 2. Then, as shown in Figures 3 and 4, the hook surface 18 of the belt fastening portion 15 engages with the loop surface on the outer surface of the upper belt 13, thereby fastening the upper belt 13 with the belt fastening portion 15. 【0024】 Here, Figure 3 shows the fastening position of the instep strap 13 when the user's instep is relatively thick. On the other hand, Figure 4 shows the fastening position of the instep strap 13 when the user's instep is relatively thin. As shown in Figures 3 and 4, the health footwear 1 can appropriately adjust the amount of overlap between the tip 14 of the instep strap 13 and the strap fastening part 15 according to the thickness of the user's foot. In this way, the fastening position of the tip 14 of the instep strap 13 relative to the sole plate 11 of the health footwear 1 can be changed. This allows for appropriate adjustment of the fit of the instep strap 13 against the instep. 【0025】 Alternatively, the outer surface of the second layer 22 may be configured as the hook surface (Side A), and the belt fastening portion 15 may be provided with a loop surface (Side B). Furthermore, hook-and-loop fasteners with a mixture of hooks and loops may be applied to both the second layer 22 and the belt fastening portion 15. 【0026】 Furthermore, the elastic modulus of the second layer 22 is greater than that of the first layer 21. Therefore, the inner surface of the upper belt 13, which is made of the first layer 21, is more elastically deformable than the outer surface, which is made of the second layer 22. 【0027】 As shown in Figure 2, the sole plate portion 11 has a first cavity 31 inside. On the other hand, the instep belt 13 has a second cavity 32 inside. The first cavity 31 and the second cavity 32 are formed between the first layer 21 and the second layer 22. The first cavity 31 is formed in the sole plate portion 11 from the heel side to the toe side. On the other hand, the second cavity 32 is formed in the instep belt 13 from the base end portion 12 to the tip end portion 14. The second cavity 32 is in communication with the first cavity 31 at the base end portion 12 of the instep belt 13. 【0028】 Here, a cavity as used herein is a sealed space in which air can move, and may be configured in which components other than air are sealed together with the air. In this embodiment 1, for example, urethane foam with a thickness of about 10 mm is pressed and placed in the first cavity 31 and the second cavity 32. 【0029】 In other words, the urethane foam, etc., is placed between a first layer 21 made of EVA and a second layer 22 made of a hook-and-loop fastener having a B-side, and the first layer 21 and the second layer 22 are bonded around the first cavity 31 and the second cavity 32, thereby sealing the first cavity 31 and the second cavity 32 together with air. In addition to urethane foam, a cushioning layer that allows air to pass through, such as polyester cotton, can be placed in the first cavity 31 and the second cavity 32. 【0030】 With the above configuration, when the health footwear 1 is worn and weight is shifted, the first cavity 31 in the sole plate 11 is partially and strongly pressed, and the air in the pressed area moves from the first cavity 31 through the base end 12 of the instep belt 13 to the second cavity 32, causing the second cavity 32 to swell and the projection 17 provided on the inner surface of the instep belt 13 to press and stimulate the instep. Subsequently, as the pressure on the sole plate 11 decreases in accordance with the movement of the foot, the air in the second cavity 32 returns to the first cavity 31 in the sole plate 11, and the pressure stimulation on the instep is alleviated. As this series of pressing actions is repeated in accordance with the movement of weight shift, blood circulation in the feet is improved and acupressure points on the instep are repeatedly pressed, thus helping to maintain and improve health. 【0031】 Furthermore, as shown in Figure 2, the entire health footwear 1 is designed to be transformable into a single sheet-like structure, eliminating the need for large storage space when not in use and making it easy to carry when traveling. In other words, it is possible to provide health footwear that is also suitable for storage and transport when not in use. 【0032】 Furthermore, the tip 14 of the sheet-like instep belt 13 is detachably attached to the base plate 11, and the attachment position of the tip 14 of the instep belt 13 to the base plate 11 can be changed. Therefore, even if the thickness of the instep varies from user to user, the projection 17 on the inner surface of the instep belt 13 can be reliably brought into contact with the instep. Consequently, acupressure points on the instep of different users can be reliably and repeatedly stimulated. 【0033】 Furthermore, by making the elastic modulus of the second layer 22 greater than that of the first layer 21, the inner surface of the instep belt 13, which is made of the first layer 21, is configured to be more elastically deformable than the outer surface, which is made of the second layer 22. As a result, when air moves from the first cavity 31 in the bottom plate portion 11 to the second cavity 32 in the instep belt 13, it becomes possible to expand the inner surface of the instep belt 13 more than the outer surface. Therefore, the pressure stimulation effect on the instep by the protrusions 17 can be enhanced. Embodiment 2 【0034】 Next, Embodiment 2 of the present invention will be described with reference to Figure 5. Figure 5 is a plan view showing the unfolded state of the health footwear 1 in Embodiment 2. In the following embodiments, the same reference numerals are used for parts that are the same as in Embodiment 1, and their detailed descriptions are omitted. 【0035】 As shown in Figure 5, the health footwear 1 of this embodiment 2 has a sole plate portion 11 that has a shielding portion 35 that separates the first cavity 31 into a toe-side cavity 31a and a heel-side cavity 31b. That is, the first cavity 31 includes a toe-side cavity 31a and a heel-side cavity 31b. 【0036】 The shielding portion 35 is interposed between the first layer 21 and the second layer 22 in the bottom plate portion 11 and extends in the width direction of the health footwear 1. The base end side 35a of the shielding portion 35 is integrally formed with the inner wall of the first cavity 31 near the belt fastening portion 15. On the other hand, the tip end side 35b of the shielding portion 35 is positioned on the base end 12 side of the instep belt 13. The shielding portion 35 is in close contact with each of the first layer 21 and the second layer 22 and is designed to block the flow of air. 【0037】 The toe-side cavity 31a and the heel-side cavity 31b are open near the tip end 35b of the shielding portion 35. As a result, the toe-side cavity 31a and the heel-side cavity 31b are in communication with the second cavity 32. 【0038】 According to this second embodiment, as shown by the bidirectional arrows in Figure 5, when the center of gravity of the foot shifts to the heel during weight transfer, the heel side of the soleplate 11 is pressed in, causing the air in the heel side cavity 31b to move to the second cavity 32, inflating the instep belt 13, and then to move to the toe side cavity 31a. Next, when the center of gravity of the foot shifts to the toes, the toe side of the soleplate 11 is pressed in, causing the air in the toe side cavity 31a to move to the second cavity 32, inflating the instep belt 13, and then to move to the heel side cavity 31b. In this way, the projection 17 of the instep belt 13 performs two pressing actions for each stepping motion of the foot, thus further enhancing the pressing stimulation effect on the instep. Embodiment 3 【0039】 Next, Embodiment 3 of the present invention will be described with reference to Figures 6 to 8. Figure 6 is a plan view showing the unfolded state of the health footwear 1 in Embodiment 3. Figure 7 is a schematic explanatory diagram showing the check valve in the open state. Figure 8 is a schematic explanatory diagram showing the check valve in the closed state. 【0040】 As shown in Figure 6, the health footwear 1 of this embodiment 3 is similar to the embodiment 2 described above in that the first cavity 31 includes a toe-side cavity 31a and a heel-side cavity 31b, but differs in that it has two check valves 41 and 42. 【0041】 As shown in Figure 6, the health footwear 1 in this embodiment 3 has a first connecting passage 51 that connects the toe-side cavity 31a and the heel-side cavity 31b, a second connecting passage 52 that connects the toe-side cavity 31a and the second cavity 32, and a third connecting passage 53 that connects the heel-side cavity 31b and the second cavity 32. 【0042】 The first communication passage 51 is provided with a first check valve 41 that allows air to move from the heel side cavity 31b to the toe side cavity 31a. The second communication passage 52 is provided with a second check valve 42 that allows air to move from the toe side cavity 31a to the second cavity 32. 【0043】 On the other hand, no check valve is provided in the third communication passage 53. The third communication passage 53 is narrower than the first communication passage 51. Also, the third communication passage 53 is narrower than the second communication passage 52. 【0044】 This structure makes it easier for the air in the heel cavity 31b to move to the toe cavity 31a through the first communication passage, which is wider than the third communication passage 53. After that, the air that has moved to the toe cavity 31a does not return to the original heel cavity 31b due to the effect of the first check valve, and when the user's weight is applied to the toe cavity 31a, it moves from the toe cavity 31a to the second cavity 32 on the instep belt 13 side through the second check valve 42. As a result, the second cavity 32 in the instep belt 13 expands and the projection 17 protrudes, the air moves and presses on the acupressure points on the instep. 【0045】 Subsequently, the air in the second cavity 32 returns to the original heel-side cavity 31b through the narrow third connecting passage 53, so that as weight shifts, the acupressure points on the top of the foot can be stimulated by the flow of air. 【0046】 As shown in Figures 7 and 8, the check valves 41 and 42 have a valve body 45 made of a flexible sheet such as polyvinyl chloride. The valve body 45 is a rectangular thin sheet that is bent so that it has a fold line 46 at the center along its longitudinal direction. 【0047】 For example, the valve body 45 has a base region 45a, which is one side of the bent line 46, attached and fixed to the lower second layer 22, while the tip region 45b, which is the other side of the bent line 46, is pivotable around the bent line 46. In this way, the check valves 41 and 42 are closed when the tip region 45b of the valve body 45 comes into contact with the upper first layer 21, and open when the base region 45a separates from the first layer 21. 【0048】 Therefore, as shown in Figure 7, when air moves from the base end region 45a of the valve body 45, the check valves 41 and 42 open, allowing air to pass through. On the other hand, as shown in Figure 8, when air moves from the tip region 45b of the valve body 45, the check valves 41 and 42 close, blocking the movement of air. The check valves 41 and 42 may be configured such that the base end region 45a of the valve body 45 is attached and fixed to the upper first layer 21, or they may have other structures. 【0049】 According to this third embodiment, when the center of gravity of the foot shifts to the heel during walking, the heel side of the sole plate 11 is pushed in, and the air in the heel side cavity 31b moves through the first check valve 41 in the first communication passage 51 to the toe side cavity 31a. At this time, since the third communication passage 53 is narrower than the first communication passage 51, a large portion of the air in the heel side cavity 31b can be moved to and collected in the toe side cavity 31a. 【0050】 Next, when the center of gravity of the foot shifts to the toes, the toe side of the soleplate 11 is pushed in, and the air collected in the toe side cavity 31a moves to the second cavity 32. The air that flows into the second cavity 32 then inflates the instep belt 13 and moves to the heel side cavity 31b. This allows the projection 17 of the instep belt 13 to protrude forcefully, thereby increasing the pressure stimulation effect on the instep. Other embodiments 【0051】 The present invention is not limited to the above embodiments 1 to 3. Although not shown in the figures, the following embodiments are also possible. For example, in embodiments 1 to 3 above, as shown in Figures 1 to 6, an example was described in which the instep belt 13 is placed on the left side of the sole plate 11 with the toe side up and the heel side down, while the belt fastener 15 is placed on the right side of the sole plate 11. However, a symmetrical configuration is also possible. That is, with the toe side up and the heel side down, the instep belt 13 may be placed on the right side of the sole plate 11, while the belt fastener 15 is placed on the left side of the sole plate 11. Depending on the user's preference, such as whether they are right-handed or left-handed, the configuration in which the instep belt 13 and the belt fastener 15 overlap is either on the right or on the left. Furthermore, the belt fastening portion 15 may also be configured to have a cavity inside, similar to the instep belt 13, and to have multiple protrusions on the surface that comes into contact with the foot. 【0052】 Furthermore, while embodiments 1 to 3 described above describe a configuration in which the belt fastening portion 15 fastens the upper belt 13 with a hook-and-loop fastener, the configuration is not limited to this, and other configurations such as string fastening or button fastening may also be used. [Industrial applicability] 【0053】 As described above, the present invention is useful for health footwear that can apply pressure and stimulate the instep of the foot. [Explanation of symbols] 【0054】 1. Health footwear 11 Bottom plate part 12 Proximal end 13 Instep belt 14 Tip 17 Protrusion 31 The first cavity 31b Heel cavity 31a Toe side cavity 32 The second cavity 35 Shielding part 41 First check valve 42 Second check valve 51 First connecting passage 52 Second connecting passage 53 Third connecting passage

Claims

[Claim 1] The sole plate that supports the sole of the foot, A health footwear having an instep belt whose base end is formed integrally with the sole plate portion, which extends along the instep when worn on the foot, and whose tip portion is configured to be detachably attached to the sole plate portion directly or indirectly, The bottom plate portion has a first cavity, The instep belt has a second cavity and a plurality of protrusions provided on its inner surface facing the instep of the foot. The second cavity is in communication with the first cavity at the base end of the upper belt. The footwear is configured to be transformable between a state in which the tip of the instep strap is directly or indirectly fastened to the sole plate, and a state in which the sole plate and the instep strap are arranged in a planar manner, so that the entire footwear becomes a single sheet. The first cavity includes a toe cavity and a heel cavity. A first connecting passage that connects the toe cavity and the heel cavity, A second connecting passage that connects the toe-side cavity and the second cavity, It has a third passage that connects the heel cavity and the second cavity, and is narrower than the first passage, The first communication passage is provided with a first check valve that allows air to move from the heel cavity to the toe cavity. A health footwear comprising a second check valve in the second passage that allows air to move from the toe cavity to the second cavity. [Claim 2] The sole plate that supports the sole of the foot, A health footwear having an instep belt whose base end is formed integrally with the sole plate portion, which extends along the instep when worn on the foot, and whose tip portion is configured to be detachably attached to the sole plate portion directly or indirectly, The bottom plate portion has a first cavity, The instep belt has a second cavity and a plurality of protrusions provided on its inner surface facing the instep of the foot. The second cavity is in communication with the first cavity at the base end of the upper belt. The footwear is configured to be transformable between a state in which the tip of the instep strap is directly or indirectly fastened to the sole plate, and a state in which the sole plate and the instep strap are arranged in a planar manner, so that the entire footwear becomes a single sheet. The first cavity includes a toe cavity and a heel cavity. The bottom plate portion has a shielding portion that separates the first cavity into the toe side cavity and the heel side cavity. A health footwear in which the toe cavity and the heel cavity are in communication with each other through the second cavity by each communicating with the second cavity.

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