Buffering sheet for goggles

Abstract

A buffering sheet for goggles, characterized by comprising a buffering portion that is disposed on a person's face, and a wearing portion that is used for wearing on the head, and in that the buffering portion is configured from a sheet having a resin foam layer, and the elongation percentage of the sheet is 50% or greater.

Description

Goggle cushioning sheet

[0001] The present invention relates to a cushioning sheet for goggles used when wearing a head-mounted display, VR goggles, or the like.

[0002] For example, there are goggles such as VR goggles and head-mounted displays. These goggles are worn on the head with the image display pads placed on the face around the eyes. When sharing goggles, it is unhygienic to place the pads directly on the face. Therefore, it has been proposed to prevent the goggle pads from coming into contact with the face by placing a stain-resistant sheet made of nonwoven fabric on the face in advance (see, for example, Patent Document 1).

[0003] JP 2016-170196 A

[0004] The sheet of Patent Document 1 does not take into consideration the stretching of the sheet in the surface direction, and therefore does not fit well to the irregularities of the face.

[0005] The present disclosure has been proposed in consideration of the above-mentioned problems associated with the conventional technology in order to solve them in an appropriate manner, and aims to provide a cushioning sheet for goggles that has excellent fit to the face.

[0006] One aspect of the cushioning sheet for goggles according to the present disclosure is characterized in that it comprises a cushioning portion that is placed on the face and a mounting portion that is used to mount the goggles on the head, the cushioning portion being made of a sheet having a resin foam layer, and the sheet having an elongation rate of 50% or more.

[0007] In addition to the above features, in one aspect of the cushioning sheet for goggles according to the present disclosure, the attachment portion may be formed from the sheet.

[0008] In addition to the above features, in one aspect of the cushioning sheet for goggles according to the present disclosure, the upper edge of the cushioning portion may have a convex shape that bulges upward.

[0009] In addition to the above features, one aspect of the cushioning sheet for goggles according to the present disclosure may be such that the thickness of the sheet is 1.0 mm or more.

[0010] In addition to the above, one aspect of the cushioning sheet for goggles according to the present disclosure may have an ILD hardness of 25% of the sheet of 40 N or more.

[0011] The cushioning sheet for goggles according to the present disclosure provides an excellent fit to the face.

[0012] 7 is a front view showing a buffer sheet for goggles according to an embodiment of the present invention. FIG. 8 is a plan view showing a buffer sheet for goggles according to an embodiment. FIG. 9 is a side view showing a buffer sheet for goggles according to an embodiment. FIG. 10 is a cross-sectional view of the buffer sheet for goggles according to an embodiment. The cross-sectional view is taken along line X-X in FIG. 1. The cross-sectional view is a schematic perspective view showing the buffer sheet for goggles according to an embodiment when worn. The cross-sectional view is a side view showing the buffer sheet for goggles according to an embodiment when worn. The cross-sectional view is taken along line Y-Y in FIG. 7. The cross-sectional view is a schematic perspective view showing the buffer sheet for goggles according to an embodiment when worn. The cross-sectional view is a side view showing the buffer sheet for goggles according to an embodiment when worn.

[0013] Next, a preferred embodiment of the cushioning sheet for goggles according to the present disclosure will be described below with reference to the accompanying drawings.

[0014] As shown in Fig. 1, a buffer sheet for goggles (hereinafter simply referred to as the buffer sheet) 10 according to the embodiment includes a buffer section 12 that is placed on the face. The buffer sheet 10 also includes a mounting section 14 that is used to attach the sheet to the head. As shown in Fig. 5, the buffer sheet 10 is used by placing the buffer section 12 on the face and mounting the mounting section 14 on the user's head. As shown in Fig. 6, when a user wears goggles 30 such as a head-mounted display or VR goggles, the buffer section 12 of the buffer sheet 10 supports the rear edge of the goggles 30.

[0015] The buffer section 12 is formed in accordance with the portion of the goggles 30 that will come into contact with the face. As shown in Figures 5 and 6, the buffer section 12 is formed in a size that allows it to be placed around the user's eyes. In this embodiment, the upper part of the buffer section 12 covers the user's forehead, the lower part of the buffer section 12 covers the area from the bridge of the nose to the cheekbones, and the side parts of the buffer section 12 cover the area from the corner of the user's eyes to between the ears.

[0016] As shown in FIG. 1 , the upper part of the buffer section 12 has a convex shape that bulges upward. This shape allows the upper part of the buffer section 12 to be placed on the forehead, making it difficult for the attached buffer sheet 10 to slip downward. Furthermore, when the buffer sheet 10 is worn, the upper part of the buffer section 12 can stretch, making it difficult for the buffer sheet 10 to slip downward. The lower part of the buffer section 12 also has a concave shape that is recessed upward. The buffer section 12 has a curved shape with its sides lowered compared to its center in the left-right direction. This shape also allows the upper part of the buffer section 12 to be placed on the forehead, making it difficult for the attached buffer sheet 10 to slip downward. In this embodiment, the upper and lower edges of the buffer section 12 are parallel curves.

[0017] As shown in FIG. 1 , the buffer section 12 is provided with an eye opening 16 where the user's eyes are positioned. As shown in FIG. 4 , the eye opening 16 in the embodiment is formed as a hole penetrating the buffer section 12. The shape of the eye opening 16 may be a circle, an ellipse, a shape derived from an ellipse, or a polygon such as a rectangle, either singly or in combination. The eye opening 16 is provided in one location in the center of the buffer section 12 in the left-right direction. For example, if the eye opening 16 in the embodiment is formed as a horizontally elongated hole corresponding to both eyes, the buffer sheet 10 can be worn while wearing eyeglasses. The eye opening 16 is formed so that the vertical width of the center portion corresponding to the space between the left and right eyes is narrower than the vertical width of the left and right side portions facing the eye positions.

[0018] As shown in FIG. 1 , the attachment sections 14 are provided on both sides of the buffer section 12. The attachment sections 14 are positioned downward relative to the buffer section 12. This shape allows stretching to occur in the upper part of the buffer section 12 that contacts the forehead, making it difficult for the attached buffer sheet 10 to slip downward. In this embodiment, the attachment sections 14 extend obliquely downward, connecting with the sides of the buffer section 12, which extends obliquely downward from the center in the left-right direction toward the sides. This allows the attachment sections 14 to naturally face the ears, which are located slightly below the eye position, making it easier to wear.

[0019] As shown in FIG. 1 , the wearing portion 14 of the embodiment has ear holes 18 for hooking onto the user's ears. The shape of the ear holes 18 is preferably a vertically elongated ellipse or a shape derived from an ellipse. The width of the opening edge of the ear holes 18 in the wearing portion 14 is preferably wider than the elastic band, and can be, for example, 5 mm to 20 mm. The ear holes 18 are positioned downward in the vertical direction of the wearing portion 14. The buffer sheet 10 is worn by passing the ear through the ear holes 18 and hooking the opening edge of the ear holes 18 in the wearing portion 14 around the base of the ear.

[0020] As shown in Figures 2 to 4, the cushioning section 12 is made of a sheet 20 having a resin foam layer. By making the cushioning section 12 out of a sheet 20 having a resin foam layer in this way, it is easy to put on and take off. In addition, when worn, it conforms to the contours of the face to fit and is less likely to slip off. Furthermore, it stretches and conforms to facial movements such as changes in facial expression, reducing discomfort and stress felt by the user.

[0021] The attachment part 14 is composed of a sheet 20 having a resin foam layer. By configuring the attachment part 14 with a sheet 20 having a resin foam layer in this way, it is easy to put on and take off. It also fits the head well and is less likely to slip off. Furthermore, it stretches and follows facial movements such as changes in facial expression, thereby reducing discomfort and stress on the user. In the embodiment, the buffer part 12 and the left and right attachment parts 14 are composed of a single sheet 20 (see Figures 2 to 4). The sheet 20 may have a multi-layer structure having, for example, a fabric layer in addition to the resin foam layer, but the sheet 20 in the embodiment is composed only of a resin foam layer.

[0022] The eyelets 16 and ear holes 18 may be cut out in a shape that opens partially into the outer edge of the sheet 20, but are preferably formed as independent holes that are surrounded by the sheet 20. This allows the buffer section 12 and the mounting section 14 to exhibit appropriate stretch and contraction in a well-balanced manner, allowing the mask to fit snugly when worn and to be less likely to slip off.

[0023] Examples of the resin foam layer include polyurethane foam, polyolefin foam such as PE (polyethylene) foam, WVA (ethylene vinyl acetate copolymer) foam, and PP (polypropylene) foam, and rubber sponge. Furthermore, flexible foams that are relatively soft and have resilience are preferred as the resin foam. Among these, polyurethane foam is preferred from the viewpoint of cost and other factors. The polyurethane foam may be either polyether-based or polyester-based. For example, the use of polyether-based polyurethane foam can improve water resistance (moisture aging resistance). Polyurethane foam produced by slab molding, extrusion, or other molding methods can be used.

[0024] The resin foam layer is preferably a membrane-removed product in which the cell walls (membranes) between adjacent cells have been removed, leaving only the skeleton, or a continuous or semi-continuous structure in which each cell wall (membrane) has holes, as these prevent stickiness due to sweat when worn and make the wearer less likely to become stuffy. Note that membrane-removed products can be obtained by known membrane-removal processes, such as dissolving cell walls with a solvent or destroying cell walls by explosion. If the bubbles are exposed on the surface of the sheet 20, the unevenness of the surface caused by the bubbles can prevent the cushioning section 12 and the wearing section 14 from slipping out of place.

[0025] The thickness of the sheet 20 is preferably 0.8 mm or more, preferably 1.0 mm or more, and more preferably 1.2 mm or more. The buffer section 12 configured with such a sheet 20 can absorb the force applied from the goggles 30 and disperse it within the buffer section 12. Furthermore, when the wearing section 14 is configured with the sheet 20, it can be made less susceptible to breakage. The thickness of the sheet 20 is preferably 10 mm or less, preferably 5 mm or less, and more preferably 3 mm or less. The buffer section 12 configured with such a sheet 20 can be made less susceptible to breakage and bulky. Furthermore, when the wearing section 14 is configured with the sheet 20, it can be made less susceptible to breakage and bulky.

[0026] The sheet 20 has extensibility in its planar direction. A buffer section 12 constructed from such a sheet 20 can fit to the face and reduce stress when worn. The extensibility of the sheet 20 is preferably 50% or more, more preferably 70% or more, even more preferably 80% or more, and particularly preferably 90% or more. A buffer section 12 constructed from such a sheet 20 can fit to the face and be easily worn. Furthermore, when the wearing section 14 is constructed from the sheet 20, the buffer sheet 10 can be easily worn. The extensibility of the sheet 20 is preferably 500% or less, more preferably 450% or less, and even more preferably 400% or less. A buffer section 12 constructed from such a sheet 20 is less likely to break, can fit to the face, and can reduce stress when worn. Furthermore, when the wearing section 14 is constructed from the sheet 20, the wearing section 14 is less likely to break, and can reduce stress when worn. The elongation percentage is measured based on JIS K6400-5:2004 Dumbbell No. 2.

[0027] The sheet 20 preferably has cushioning properties that allow it to elastically deform in its thickness direction. The hardness (25% ILD) of the sheet 20 is preferably 40 N or more, preferably 80 N or more, and more preferably 100 N or more. A buffer section 12 formed from such a sheet 20 can absorb the force applied from the goggles 30 and disperse it within the buffer section 12. Furthermore, when the wearing section 14 is formed from the sheet 20, it can be made less susceptible to breakage. The hardness (25% ILD) of the sheet 20 is preferably 300 N or less, preferably 250 N or less, and more preferably 200 N or less. A buffer section 12 formed from such a sheet 20 can fit to the face and be easily worn. Furthermore, when the wearing section 14 is formed from the sheet 20, it can make the buffer sheet 10 easier to wear. The above-mentioned hardness is measured according to JIS K6400-2:2012, a hardness test method using a flat disk pressure plate having a diameter of 200 mm at 25% compression (method D).

[0028] The density of the sheet 20 is 10 kg / m ３ It is preferable that the temperature is 13 kg / m or more.３ It is preferable that the saturation is 20 kg / m or more. ３ It is more preferable that the density of the sheet 20 is 150 kg / m or more. The buffer section 12 made of such a sheet 20 is less likely to break, can fit to the face, and can reduce the load when worn. Furthermore, when the wearing section 14 is made of the sheet 20, it can be made less likely to break. ３ It is preferable that the value is less than 120 kg / m ３ It is preferable that the saturation is 100 kg / m or less. ３ It is more preferable that the density is less than or equal to the above. The cushioning section 12 formed from such a sheet 20 can be made lightweight, reducing the load when worn. Furthermore, when the wearing section 14 is formed from the sheet 20, the weight can be reduced, reducing the load when worn. The density is measured based on JIS K7222:2005.

[0029] The cell size of the sheet 20 is preferably 20 cells / 25 mm or more, preferably 30 cells / 25 mm or more, and more preferably 40 cells / 25 mm or more. A buffer section 12 constructed from such a sheet 20 can be made lightweight, reducing the load when worn. Furthermore, when the wearing section 14 is constructed from the sheet 20, it can be made lightweight and reducing the load when worn. The cell size of the sheet 20 is preferably 100 cells / 25 mm or less, preferably 90 cells / 25 mm or less, and more preferably 80 cells / 25 mm or less. A buffer section 12 constructed from such a sheet 20 is less likely to break, can fit to the face, and can reduce the load when worn. Furthermore, when the wearing section 14 is constructed from the sheet 20, it can be made less likely to break. Note that the cell size is measured based on JIS K6400-1:2004 Appendix 1 (Reference).

[0030] The sheet 20 is preferably breathable. ３ / (cm ２ sec) or more, and ３ / (cm ２ sec) or more, and ３ / (cm ２ sec) or more. A buffer section 12 formed from such a sheet 20 is less likely to become stuffy and can reduce the load when worn. Furthermore, when the wearing section 14 is formed from the sheet 20, it is less likely to become stuffy and can reduce the load when worn. The breathability described above is a value measured using the method described in JIS L1096-7:2010 "Testing methods for woven and knitted fabrics: Method A (Fragile type method)."

[0031] It is preferable to use a sheet 20 that has excellent cleanliness (a clean-treated product) that has been treated to reduce odors caused by chemical substances such as foaming agents. Examples of cleaning treatments include washing the resin foam with water or heat treatment (e.g., at 70 to 120°C for 30 to 120 minutes) to remove odors, thereby removing chemical substances remaining in the resin foam.

[0032] The buffer sheet 10 of the embodiment can be easily formed, for example, by punching a sheet 20 of a required thickness using a Thomson blade or the like.

[0033] The cushioning sheet 10 is positioned on the face by aligning the eye openings 16 with the left and right eyes and hooking the ear holes 18 of the attachment part 14 over the ears. According to the cushioning sheet 10, the goggles 30 are supported by the cushioning part 12 made of the sheet 20 having a resin foam layer, so the force applied by the goggles 30 can be dispersed, reducing the burden on the user.

[0034] The buffer section 12 has moderate stretchability, making it easy to put on and take off. It also conforms to the contours of the face when worn, making it less likely to slip off. Furthermore, it stretches and conforms to facial movements, such as changes in facial expression, reducing discomfort and strain on the user.

[0035] The buffer section 12 has cushioning properties with a moderate hardness (25% ILD), which disperses the force applied by the goggles 30 when wearing them, reducing the burden on the user. Furthermore, since it deforms to conform to the contours of the face and the shape of the rear edge of the goggles 30, it can be used universally with goggles 30 of various shapes and sizes. Furthermore, since gaps are less likely to form between the goggles 30 and the buffer sheet 10, it is possible to improve the shielding properties, preventing light leakage and the like.

[0036] The buffer portion 12 has an appropriate thickness, which can disperse the force applied from the goggles 30 when the goggles 30 are held, thereby reducing the burden on the user. Also, the buffer portion 12 can be made less susceptible to breakage.

[0037] The upper part of the buffer part 12 has an upward convex shape, which allows it to conform to the three-dimensional structure of the face while avoiding excessive stretching of parts of the buffer part 12. Moreover, it provides a cushioning effect for the face around the eyes and also provides a certain amount of stretch in the forehead area to prevent it from slipping downward when worn.

[0038] The fitting portion 14 has moderate stretchability, making it easy to put on and take off. It also reduces discomfort and strain on the user when worn. The fitting portion 14 has moderate cushioning with a moderate hardness (25% ILD), reducing strain on the user. The fitting portion 14 has a moderate thickness, dispersing force when worn on the head (ears), reducing strain on the user. It also makes it less likely to break.

[0039] (Test) Test example buffer sheets made of a flexible polyurethane foam sheet and reference example buffer sheets made of a nonwoven fabric sheet were manufactured in the same shape, and their wearability was evaluated. The elongation and hardness of each sheet are shown in Tables 1 and 2 below. The nonwoven fabric sheet lacks cushioning properties, making it impossible to measure 25% ILD. The wearability was evaluated by actually wearing the buffer sheet and evaluating three items: (1) ease of wearing, (2) fit, and (3) load during wearing. A rating of "○" was given if one or more of the items were better than the reference example; a rating of "◎" was given if two or more of the items were better than the reference example; and a rating of "×" was given if one or more of the items were worse than the reference example.

[0040]

[0041]

[0042] Table 1 shows that good fit can be obtained when the sheet has an elongation range of Test Examples 1 to 7. Table 2 shows that good fit can be obtained when the sheet has a hardness range of Test Examples 8 to 13.

[0043] (Modifications) The present invention is not limited to the above-described matters, and may be modified as follows, for example: Note that the present invention is not limited to the specific descriptions of the examples and the following modifications.

[0044] (1) The shape and number of the eye-opening portions are not limited to those of the embodiment. For example, as shown in Figures 7 to 10, two eye-opening portions 16 may be formed spaced apart in the left-right direction. The eye-opening portions 16 are holes that penetrate the buffer portion 12. In the modified example, the buffer portion 12 and the attachment portion 14 are the same as those of the embodiment. In the buffer sheet 10 of the modified example, the left and right eye-opening portions 16 are aligned with the left and right eyes, and the attachment portion 14 is attached to the ears, so that the buffer portion 12 is positioned on the face. The planar and side surfaces of the buffer sheet 10 of the modified example are the same as those of the embodiment. If the eye-opening portions 16 are independent and correspond to the left and right eyes, as in the modified example, the buffer portion 12 can cover and protect the bridge of the nose.

[0045] (2) The sheet may include layers other than the resin foam layer. Examples include a fiber layer formed by sheeting fibers such as knitted fabric, woven fabric, or nonwoven fabric, and a coating layer such as a resin. Even if the sheet has a multi-layer structure, it is preferable that the sheet satisfy the physical properties such as elongation and hardness described above. The fabric used for the sheet is preferably knitted fabric, such as tricot or circular knit. Nonwoven fabrics are preferably made of materials that conform to elongation, such as spunlace. In either case, the material is not particularly limited, but may be any of synthetic fibers, natural fibers, and the like, such as polyester, nylon, rayon, urethane, cotton, etc. To ensure the elongation of the material, a stretchable material such as urethane or a stretch material may be used to structurally facilitate elongation. (3) The buffer sheet is not limited to forming the buffer section and the mounting section from a single sheet, and the buffer section and the mounting section may be formed by bonding separate sheets. The buffer section may be formed by bonding two or more sheets. The mounting section may be formed by bonding two or more sheets. (4) The attachment part is not limited to being made of a sheet, but may be made of a resilient material such as a string or rubber. (5) The attachment part is not limited to being configured to be hooked onto the ears through the ear hook holes, but may be attached in other ways, such as by tying the left and right attachment parts behind the head, or by connecting the left and right attachment parts to form a ring-shaped buffer sheet that is fitted onto the head.

[0046] The present disclosure describes a cushioning sheet for goggles, which includes a cushioning portion to be placed on the face and a mounting portion to be mounted on the head, the cushioning portion being composed of a sheet having a resin foam layer. According to the cushioning sheet for goggles, the cushioning portion supports the goggles, thereby dispersing the force applied from the goggles and reducing the burden on the user.

[0047] 10 Goggle cushioning sheet (cushioning sheet), 12 Cushioning part, 14 Wearing part, 20 Sheet

Claims

1. A cushioning portion disposed on the face; A mounting part for mounting on the head, The cushioning portion is composed of a sheet having a resin foam layer, The sheet has an elongation rate of 50% or more. A cushioning sheet for goggles.

2. 2. The cushioning sheet for goggles according to claim 1, wherein the mounting portion is constituted by the sheet.

3. 3. The cushioning sheet for goggles according to claim 1, wherein an upper edge of the cushioning portion has a convex shape that bulges upward.

4. 3. The cushioning sheet for goggles according to claim 1, wherein the thickness of the sheet is 1.0 mm or more.

5. 3. The cushioning sheet for goggles according to claim 1, wherein the sheet has a 25% ILD hardness of 40 N or more.

6. The goggle cushioning sheet according to any one of claims 1 to 5, wherein an upper edge of the cushioning portion has a convex shape bulging upward, and a lower edge of the cushioning portion has a concave shape recessed upward.

7. 7. The cushioning sheet for goggles according to claim 6, wherein the upper and lower edges of said cushioning portion are curved.

8. 8. The goggle cushioning sheet according to claim 7, wherein an upper edge of the cushioning portion and an upper edge of the mounting portion are curved, and a lower edge of the cushioning portion and a lower edge of the mounting portion are curved.

9. The goggles cushioning sheet according to any one of claims 1 to 8, wherein the mounting portion extends obliquely downward from the cushioning portion.

10. 10. The goggle cushioning sheet according to claim 1, wherein the sheet has an elongation of 70% or more and an ILD hardness of 25% of the sheet of 80N or more.

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