Goggle cushioning sheet

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

[Technical Field]

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

[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 beforehand (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-170196 Summary of the Invention [Problem to be solved by the invention]

[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. [Means for solving the problem]

[0006] One aspect of the goggle cushioning sheet according to the present disclosure is: A buffer portion disposed on the face; a mounting portion for mounting on the head, the buffer portion is composed of a sheet having a resin foam layer, The gist is that the sheet has 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 be such that the 25% ILD hardness of the sheet is 40 N or more. [Effects of the Invention]

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

[0012] [Figure 1] 1 is a front view showing a cushioning sheet for goggles according to an embodiment of the present invention. [Figure 2] FIG. 1 is a plan view showing a cushioning sheet for goggles according to an embodiment of the present invention. [Figure 3] FIG. 2 is a side view showing the cushioning sheet for goggles according to the embodiment. [Figure 4] 2 is a cross-sectional view of the cushioning sheet for goggles of the embodiment, taken along line XX in FIG. [Figure 5] 1 is a schematic perspective view showing a state in which the cushioning sheet for goggles of the embodiment is attached. FIG. [Figure 6] FIG. 2 is a side view showing the state in which the cushioning sheet for goggles of the embodiment is attached. [Figure 7]FIG. 10 is a front view showing a modified example of the exposed portion. [Figure 8] 8 is a cross-sectional view of a modified example of the cushioning sheet for goggles taken along line YY in FIG. [Figure 9] FIG. 10 is a schematic perspective view showing a modified example of a cushioning sheet for goggles in an attached state. [Figure 10] FIG. 10 is a side view showing a modified example of a cushioning sheet for goggles attached. DETAILED DESCRIPTION OF THE INVENTION

[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. [Example]

[0014] As shown in FIG. 1, a buffer sheet for goggles (hereinafter simply referred to as a 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 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 cushioning portion 12 is formed according to the portion of the goggles 30 that will come into contact with the face. As shown in Figures 5 and 6, the cushioning portion 12 is formed to a size that allows it to be placed around the user's eyes. In this embodiment, the upper portion of the cushioning portion 12 covers the user's forehead, the lower portion of the cushioning portion 12 covers the area from the bridge of the nose to the cheekbones, and the side portions of the cushioning portion 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 be stretched, making it difficult for the buffer sheet 10 to slip downward. In addition, the lower part of the buffer section 12 has a concave shape that is recessed upward. The buffer section 12 has a curved shape in which the sides are lower than the 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, and these may be configured 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 in the left-right direction 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 the embodiment, the attachment sections 14 extend obliquely downward, connecting with the side sections of the buffer section 12 that extend 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 this 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 up 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 snugly 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 made 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 made 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 made of only a resin foam layer.

[0022] The eyelets 16 and ear holes 18 may be cut out in part at the outer edge of the sheet 20, but are preferably formed as independent holes surrounded by the sheet 20. This allows the buffer section 12 and the mounting section 14 to stretch and shrink appropriately in a balanced manner, ensuring a good fit when worn and preventing slippage.

[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 good resilience are preferred as the resin foam. Among these, polyurethane foam is preferred from the viewpoint of cost and other factors. 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. When 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. A buffer 12 configured with such a sheet 20 can withstand the force applied from the goggles 30 and disperse it within the buffer 12. Furthermore, when the wearing part 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. A buffer 12 configured with such a sheet 20 can be made less susceptible to breakage and less bulky. Furthermore, when the wearing part 14 is configured with the sheet 20, it can be made less susceptible to breakage and less bulky.

[0026] The sheet 20 has extensibility in its planar direction. A buffer section 12 formed from such a sheet 20 can fit to the face and reduce stress when worn. The elongation of the sheet 20 is preferably 50% or more, more preferably 70% or more, more preferably 80% or more, and particularly preferably 90% or more. 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, the buffer sheet 10 can be easily worn. The elongation of the sheet 20 is preferably 500% or less, more preferably 450% or less, and more preferably 400% or less. A buffer section 12 formed 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 formed from the sheet 20, the wearing section 14 is less likely to break and can reduce stress when worn. Note that the elongation is measured based on JIS K6400-5:2004 dumbbell type 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, more preferably 80 N or more, and even more preferably 100 N or more. A buffer section 12 formed from such a sheet 20 can withstand 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, more preferably 250 N or less, and even more preferably 200 N or less. A buffer section 12 formed from such a sheet 20 can fit to the face and is easy to wear. Furthermore, when the wearing section 14 is formed from the sheet 20, it can make the buffer sheet 10 easier to wear. The hardness mentioned above is based on the hardness test method of JIS K6400-2:2012, which is a 25% compression test using a flat, circular pressure plate with a diameter of 200 mm (Method D).

[0028] The density of the sheet 20 is 10 kg / m 3It is better to use more than 13 kg / m 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 recommended that the temperature be 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. A buffer section 12 made of such a sheet 20 can be made lightweight, reducing the load when worn. Furthermore, when the wearing section 14 is made of 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, the buffer section 12 can be made lightweight, 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. 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 2sec) or more, and 3 / (cm 2 ·sec) or more is even more preferable. A buffer section 12 made up of such a sheet 20 is less likely to become stuffy and can reduce the load when worn. Furthermore, when the wearing section 14 is made up of the sheet 20, it is less likely to become stuffy and can reduce the load when worn. The breathability mentioned 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., 70 to 120°C, 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. With the cushioning sheet 10, the goggles 30 are supported by the cushioning part 12 made of the sheet 20 having a resin foam layer, which distributes the force applied by the goggles 30 and reduces 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 conforms 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 unlikely 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 section 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. It can also 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 a 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 a moderate hardness (25% ILD) of cushioning, 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 the 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] [Table 1]

[0041] [Table 2] JPEG0007820504000002.jpg30164

[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] (Example of change) The present invention is not limited to the above-mentioned items, but may be, for example, as follows: Note that the present invention is not limited to the specific descriptions of the examples and the following modified examples.

[0044] (1) The shape and number of the eye-opening portions are not limited to those of the embodiment. For example, as shown in Figs. 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. When 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 have a layer other than the resin foam layer. Examples include a fiber layer formed by forming fibers such as knitted fabric, woven fabric, or nonwoven fabric into a sheet, 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 the elongation and hardness described above. The fabric used for the sheet is preferably knitted fabric, such as tricot or circular knit. For nonwoven fabric, a material that can follow elongation is preferable, such as spunlace. In either case, the material is not particularly limited, and may be any of polyester, nylon, rayon, urethane, cotton, synthetic fiber, natural fiber, etc. In order to ensure the elongation of the material, a stretchy material such as urethane material or a stretch material may be used to make the structure more stretchable. (3) The buffer sheet is not limited to forming the buffer section and the mounting section from a single sheet, but may be formed by joining separate sheets. The buffer section may be formed by joining two or more sheets. The mounting section may be formed by joining 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 string or rubber. (5) The attachment part is not limited to a configuration in which the ears are hooked onto the ear loop 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 cushioning sheet that is then fitted onto the head.

[0046] This disclosure includes: A buffer portion disposed on the face; a mounting portion for mounting on the head, The document describes a cushioning sheet for goggles, in which the cushioning portion is composed of a sheet having a resin foam layer. According to the above-described goggle buffer sheet, the goggles are supported by the buffer portion, so that the force applied from the goggles is dispersed, thereby reducing the burden on the user. [Explanation of symbols]

[0047] 10 Goggle cushioning sheet (cushioning sheet), 12 cushioning part, 14 wearing part, 20 sheets

Claims

1. A buffer portion disposed on the face; a mounting portion for mounting on the head, the buffer section is composed of a sheet having a polyurethane foam layer or a polyolefin foam layer, The sheet is any one of a film-removed product, a continuous structure product, and a semi-continuous structure product, The 25% ILD hardness of the sheet is 40N or more and 300N or less, The elongation of the sheet is 50% or more. A cushioning sheet for goggles.

2. 2. The cushioning sheet for goggles according to claim 1, wherein the upper edge of the cushioning portion has a convex shape that bulges upward, and the lower edge of the cushioning portion has a concave shape that dents upward.

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