JP2022012575A - Face shield - Google Patents

Abstract

To inexpensively mass-produce a face shield by making the face shield into a simple structure by reducing the number of components and to improve a use environment while simply and easily wearing the face shield in use.SOLUTION: A face shield comprises: a body sheet part 10 being made of a transparent resin having flexibility and having predetermined size; and belt parts 11 provided by projecting to right and left and making tip parts connectable with each other on both sides of an upper part of the body sheet part 10. The body sheet part 10 forms a plurality of molding protrusions 12 constituted by projecting to one surface side and making the rear surface side as a hollow recess 13 between the belt parts 11 projecting to right and left. The face shield is constituted so that the body sheet part 10 is arranged spaced apart from the face F at a curved posture in a state in which tip surfaces 12x of the plurality of molding protrusions 12 are brought into contact with the forehead H of a wearer, the belt parts 11 are wound around the head T and the tip parts are connected with each other when the face shield is worn.SELECTED DRAWING: Figure 1

Description

The present invention relates to a face shield.

In the medical field, the patient's body fluids and blood may be scattered during treatment, which may accidentally come into contact with the eyes, mouth, and nose of doctors and nurses. When the patient to be treated has a contagious pathogen, the liquid containing the pathogen may come into contact with the eyes, mouth, and nose of the doctor or the like, and the doctor or the like may be infected with the pathogen. In particular, due to the recent worldwide epidemic of COVID-19, the so-called new coronavirus, it contains the pathogens of patients such as the eyes, mouth, etc. of doctors so that doctors and others will not be infected with the pathogens when treating patients infected with it. The need to reliably prevent contact with liquids is further increasing. In addition, in the medical field, harmful chemicals are often handled, which may accidentally come into contact with the eyes, mouth, nose, skin, etc. of doctors and nurses, causing damage to doctors and the like.

Therefore, a medical facial protector that protects a harmful liquid from contact with the face has been proposed (see, for example, Patent Document 1). As shown in FIG. 16, in this medical facial protective device, a liquid-impermeable transparent flat plate film 91 that covers the face is attached to a fixing member 92 that fixes the flat plate film 91 to the head, and both ends of the flat plate film 91. It is attached via the spacer portion 93 provided in the above. As a result, a space is provided between the flat plate film 91 and the face by the spacer portion 93 when worn, so that the face is not pressed even when the glasses are worn, and the glasses do not come into contact with the film.

However, since the medical face protector having the above structure covers the face with a flat plate film, it has a drawback that the front side of the face can be covered, but the side surface side of the face cannot be sufficiently covered. Further, when the flat plate film is thinned, it is easily deformed and its shape is not stable at the time of use. Therefore, it is necessary to form the flat plate film thickly, and there is a problem that it cannot be mass-produced at low cost. In particular, in medical settings during an infectious disease epidemic, it is required to be mass-produced at low cost because it is disposed of after use.

On the other hand, as a face shield that covers the wearer's face by using a bendable transparent plastic plate instead of the transparent flat plate film, a face guard portion made of a transparent plastic sheet as shown in the perspective view of FIG. It has been proposed that the strap portions 82 are connected to both sides of the 81, and the spacer 83 made of a bendable cushion material for providing a space between the face and the face is fixed to the upper portion of the sheet-shaped face guard portion 81. There is. As shown in the perspective view of FIG. 18, the face shield 80 covers the face with the face guard portion 81 in a state where the spacer 83 is in contact with the forehead, and the strap portions 82 connected to both sides are arranged on the back of the head side. It has a structure to be attached. The face shield 80 shown in FIG. 18 uses a rubber-like string having elasticity as the strap portion 82, so that the face guard portion 81 can be held in a fixed position on the face by utilizing the elasticity of the strap portion 82. I have to.

However, this type of face shield 80 has a problem that when the user wears the spectacles, the spectacles tend to become cloudy due to the breath discharged from the user's mouth. In particular, in the face shield shown in the figure, since the spacer 83 is arranged on the forehead portion of the user, ventilation is deteriorated in this portion, and the breath exhaled by the user is trapped and causes the glasses to be fogged. In addition, the shadow generated by the spacer 83 arranged on the forehead may darken the user's hand and hinder the work. Further, the face shield 80 shown in the figure is manufactured by separately preparing the face guard portion 81, the strap portion 82, and the spacer 83 and fixing them in a fixed position, so that it takes time and effort to manufacture and the manufacturing cost is high. There was a problem that it became expensive. Further, since the face shield 80 has a three-dimensional structure due to the spacer 83 fixed to the face guard portion 81, there is a problem that it cannot be compactly stored when transporting or storing a large number of products. ..

As a face shield that eliminates the above drawbacks, a face shield 70 having the structures shown in FIGS. 19 and 20 has also been proposed. The face shield 70 shown in the figure is a face guard portion 71 made of a bendable transparent plastic sheet, a forehead band 73 placed on the wearer's forehead, and a forehead band 73 connected to both ends of the forehead band 73 and placed on the user's head. It is provided with a strap portion 72 to be formed. The face guard portion 71 is provided with connecting pieces 74 protruding from both sides of the upper portion, and the connecting pieces 74 are opened with connecting holes 74a for connecting to the forehead band 73. The forehead band 73 has a positioning hole 73a for positioning the connecting piece 74 of the face guard portion 71 and connecting the strap portion 72 at both ends thereof. The face shield 70 having this structure has the connecting holes 74a and the positioning holes in a state where the connecting holes 74a provided in the connecting piece 74 of the face guard portion 71 and the positioning holes 73a provided at both ends of the forehead band 73 are aligned. It is assembled by inserting and fixing both ends of the strap portion 72 to 73a. In this face shield 70, the distance between the connecting holes 74a provided on both sides of the face guard portion 71 is larger than the distance between the positioning holes 73a provided at both ends of the forehead band 73, and the forehead band 73 is attached. In a state where the strap portion 72 is rotated and fixed to the head in close contact with the forehead of the person, the sheet-shaped face guard portion 71 is curved with the connecting pieces 74 on both sides as both ends.

The above face shield 70 is arranged on the front surface while being arranged at a fixed position on the wearer's head by a forehead belt 73 that is in close contact with the wearer's forehead and a strap portion 72 that is rotated around the wearer's head. The sheet-shaped face guard portion 71 can be curved to cover the face. Since the face shield 70 is arranged so that the face guard portion 71 is separated from the face without arranging a spacer between the face guard portion 71 and the forehead, it is possible to prevent shadows from being formed while improving the air permeability. There are features. Further, since it is composed of a sheet-shaped face guard portion 71, a forehead band 73, and a strap portion 72, it can be stored compactly in a disassembled state, and has a feature that it can be efficiently transported and stored.

However, since the face shield 70 is in a curved posture by loosening the face guard portion 71, the shape and position of the face guard portion 71 are not stable, and the positional relationship between the face guard portion 71 and the face is not suitable during use. There is a drawback that it tends to be stable. Further, since the forehead band 73 is arranged in close contact with the entire forehead of the wearer, there is a problem that the wearer feels oppressive and cannot be used comfortably. Furthermore, since the face shield 70 needs to be assembled by connecting the strap portion 72 while positioning the face guard portion 71 and the forehead band 73 at the time of use, there is a problem that it takes time to assemble. In particular, the face shield used as a countermeasure against infectious diseases is premised on being disposable, so the structure assembled every time it is used is extremely inefficient and cannot be used conveniently.

Jikkenhei 06-029511 Gazette

The present invention has been made in view of such a background, and one of the purposes thereof is to reduce the number of parts and to make a simple structure so that mass production can be performed at low cost, and at the time of use, it is easy and easy. The purpose is to provide a face shield that can improve the usage environment while being attached to a large number of products and can efficiently store and store a large number of products.

Means for Solving Problems and Effects of Invention

The face shield according to the first aspect of the present invention is a face shield for covering the wearer's face, and is made of a flexible transparent resin, and has a main body sheet portion having a predetermined size and a main body sheet. Both sides of the upper part of the portion are provided with belt portions that are provided so as to project to the left and right so that the tips of the portions can be connected to each other. The main body sheet portion is between the belt portions protruding to the left and right, and protrudes to one surface side to form a plurality of molded convex portions having the back surface side as a hollow concave portion. When the face shield is attached, the tip surfaces of the plurality of molded convex portions are in contact with the wearer's forehead, the belt portion is turned around the head, and the tip portions of each other are connected to each other. It is configured to be placed away from the face in a curved posture.

With the above configuration, by connecting the main body seat part and the belt part to form an integrated structure, mass production can be performed at low cost while reducing manufacturing costs, and at the time of use, no special assembly process is required and it is easy. Moreover, while being easily installed, it is possible to improve the usage environment and realize the features that can be conveniently used. In this way, mass production at low cost leads to a stable supply of face shields whose demand is tight due to the global epidemic of the new coronavirus, and it is extremely convenient in medical settings because it can be easily installed. Can be used. Further, by integrating the main body seat portion and the belt portion, there is also a feature that the labor required for transportation and storage can be simplified and the handling can be simplified as compared with the structure in which these are separate members.

In addition, the above face shield is fixed in place via the belt portion that is turned around the head while the tip surfaces of the plurality of molded convex portions are in contact with the wearer's forehead, so that the entire forehead feels oppressive. It can be used comfortably by improving the fit without giving it. Furthermore, by bringing the tip surfaces of the plurality of molded convex portions into contact with each other along the wearer's forehead, the main body seat portion is placed in a curved posture so as to cover the wearer's face, so that the shape is optimal for the wearer. It can be curved to a good position and can be stably held in a good wearing state, and by forming a predetermined space between the wearer's face and the seat of the main body, there is no discomfort even when wearing glasses or goggles. Can be attached.

In the face shield according to the second side surface of the present invention, the main body sheet portion forms a plurality of molded convex portions on a straight line connecting the left and right belt portions so as to be separated from each other.

With the above configuration, by providing a plurality of molded convex portions apart from each other, when the face shield is attached to the face, the plurality of molded convex portions can be provided while avoiding a situation in which adjacent molded convex portions interfere with each other. The main body sheet portion can be curved so that the tip portions are in a posture of approaching each other, and the tip surfaces of the plurality of molded convex portions can be fitted to the forehead. Therefore, even for users with different head shapes and sizes, the tip surface of the molded convex portion can be fitted to the forehead while the main body sheet portion is curved to an ideal shape, and the face can be reliably covered. .. In addition, by arranging a plurality of molded convex portions in a straight line between the left and right belt portions, in a state where the left and right belt portions are rotated around the head and connected, the tip surface of the molded convex portions is placed on the forehead. There is a feature that the main body seat can be placed in a predetermined position away from the face in the correct posture by pressing in a surface contact state. In particular, the pulling force of the belt portion acts as a force on which the tip surface of each molded convex portion presses the forehead, so that the main body seat portion can be stably attached. Furthermore, by providing a plurality of molded convex portions apart from each other, a ventilation gap can be formed between adjacent molded convex portions with the face shield attached, and the ventilation between the main body sheet portion and the face is improved. can. Therefore, it is possible to prevent the inner surface of the main body seat portion from becoming cloudy due to the breath exhaled by the wearer, and it is possible to effectively prevent the glasses from becoming cloudy when the wearer uses the glasses.

The face shield according to the third aspect of the present invention has a plurality of molded protrusions formed in a constricted shape.

With the above configuration, when the face shield is attached to the face, the main body seat portion can be curved so that the tips of the molded convex portions having a constricted tip are close to each other, so that the main body seat portion has a higher degree of freedom. Can be curved with to fit the tip surfaces of the plurality of molded protrusions to the user's forehead. Further, by forming the molded convex portion into a constricted shape, it is possible to widen the ventilation gap formed between the adjacent molded convex portions while reducing the area of the tip surface in contact with the wearer's forehead. Furthermore, by forming a plurality of molded convex portions into a constricted shape, in a state where a plurality of face shields are laminated with each other, the molded convex portions of one face shield are fitted into the concave portions of the other face shield. By stacking the main body sheets, they can be stacked compactly, and there is also the feature that many sheets can be transported and stored while being stored in a small space.

The face shield according to the fourth side surface of the present invention includes an outer peripheral wall in which a molded convex portion is formed in an upright posture with respect to a reference surface of a main body sheet portion, and a tip surface formed at the tip of the outer peripheral wall. A reinforcing rib extending in the height direction of the molded convex portion is formed on the outer peripheral wall.

With the above configuration, the strength of the molded convex portion in the height direction can be increased, and the main body sheet portion can be stably supported while the tip surface of the molded convex portion is pressed against the wearer's forehead.

The face shield according to the fifth aspect of the present invention includes an outer peripheral wall in which a molded convex portion is formed in an upright posture with respect to a reference surface of a main body sheet portion, and a tip surface formed at the tip of the outer peripheral wall. The rising portion of the outer peripheral wall is a curved surface that gradually becomes steeper toward the tip of the molded convex portion.

With the above configuration, by making the rising portion of the outer peripheral wall of the molded convex portion a curved surface, the boundary portion between the molded convex portion protruding from the main body sheet portion and the reference surface of the main body sheet portion is reinforced and cracked in this portion. And cracks can be effectively prevented. In particular, the main body sheet portion provided with the plurality of molded convex portions is curved at the rising portions of the plurality of molded convex portions to bend the entire main body sheet into a predetermined shape, so that the structure for reinforcing the rising portions of the molded convex portions. Can realize the feature that it can be used with peace of mind while effectively preventing damage to the main body seat.

In the face shield according to the sixth side surface of the present invention, the main body sheet portion and the belt portion are integrally molded with one resin sheet.

According to the above configuration, since the main body sheet portion and the belt portion are integrally molded by one resin sheet, the manufacturing process can be simplified and mass production can be performed at low cost.

The face shield according to the seventh side surface of the present invention has a first belt portion in which a belt portion is connected to one side edge of the main body seat portion and a second belt in which the belt portion is connected to the other side edge of the main body seat portion. Of the first belt part and the second belt part, one is a long belt part longer than the other and the other is a short belt part, and the tips of the long belt part and the short belt part are connected to each other. , It is configured to be located on the temporal side of the wearer and connected.

According to the above configuration, of the belt portions provided on both sides of the main body seat portion, one is used as a long belt portion and is longer than the other short belt portion, so that the belt portion protruding from the main body seat portion is unevenly distributed on one side and becomes longer. It can be provided and has the feature that it can be easily handled during storage and transportation. In particular, by shortening one of the belt portions protruding from the main body sheet portion, when the face shield is manufactured from one resin sheet, the portion to be discarded due to cutting can be reduced, and the manufacturing cost can be reduced.

The face shield according to the eighth side surface of the present invention is one side edge of the main body seat portion, and is a boundary between the first side edge provided with the long belt portion and the lower side edge of the long belt portion. A first curved portion is formed in the portion, and a second curved portion is formed at the boundary portion between the first side edge of the main body seat portion and the lower end edge of the main body seat portion. The first curved line formed in the one curved portion and the second curved line formed in the second curved portion are configured to form a point-symmetrical shape with the midpoint of the first side edge as the center of symmetry. There is.

According to the above configuration, as shown in FIG. 15, when a plurality of face shields 100 are molded from one resin sheet 50, the main body sheet portion 10 and the long belt portion 15 constituting each face shield 100 are arranged. By molding while arranging the resin sheets so that they are point-symmetrical to each other, it is possible to efficiently manufacture the resin sheet while reducing the loss generated when the resin sheet is cut. In particular, by arranging the first curved line of the first curved portion and the second curved line of the second curved portion in a point-symmetrical manner, one of the face shields formed adjacent to each other is used. , The lower end edge of the main body sheet part → the second curved part → the first side edge → the first curved part → the lower side edge of the long belt part and the cutting line extending under the long belt part in the other face shield Side side edge → 1st curved part → 1st side edge → 2nd curved part → The lower end edge of the main body sheet part can be matched with the extending cutting line, and a face shield of the same shape can be made efficiently by one cutting. Can be manufactured well.

The face shield according to the ninth aspect of the present invention has a first belt portion in which a belt portion is connected to one side edge of the main body seat portion and a second belt in which the belt portion is connected to the other side edge of the main body seat portion. It is provided with a portion, and a plurality of slits are formed in the first belt portion, and an arrowhead-shaped insertion portion that can be inserted into the slit is formed in the second belt portion.

The face shield according to the tenth aspect of the present invention is provided with a mark on the first belt portion corresponding to each slit to specify the connecting position of the insertion portion.

According to the above configuration, a mark for specifying the connection position of the insertion portion is provided corresponding to each slit provided in the first belt portion, so that the wearer can optimally connect to the size of his / her head. By empirically learning the position from the mark provided on the slit, the insertion portion can be inserted into a specific slit and the first belt portion and the second belt portion can always be connected at the optimum position. This makes it possible to always wear the face shield in the optimum state while shortening the time required to wear the face shield.

In the face shield according to the eleventh side surface of the present invention, a plurality of molded convex portions are arranged on a first molded convex portion arranged in an intermediate portion of the main body sheet portion and a second molded convex portion arranged on both side portions of the main body sheet portion. It is provided with a convex portion, and the average height of the first molded convex portion is made higher than the average height of the second molded convex portion.

With the above configuration, when the face shield is attached, a sufficient space is formed between the face and the main body seat portion by the first molded convex portion in the central portion of the main body seat portion, while on both side portions of the main body seat portion. By deforming the main body seat portion so that the portion to which the belt portion is connected is close to the wearer's head by the second molded convex portion, the side surface side of the wearer can be effectively covered.

The face shield according to the twelfth side surface of the present invention is provided with two first molded convex portions and is provided with two first molded protrusions.
The second molding convex portion is provided on each side one by one.

The face shield according to the thirteenth side surface of the present invention has a molded convex portion formed in a shape in which the protruding height gradually decreases from the central side to the side edge side of the main body sheet portion in a plan view.

According to the above configuration, when the face shield is attached, the central side of the main body seat portion is in contact with the molded convex portion and the forehead to form a space between the face and the face, while the belt portions are connected on both sides of the main body seat portion. In the portion where the belt portion is formed, the belt portion can be connected while deforming the main body seat portion so as to approach the wearer's head.

In the face shield according to the fourteenth aspect of the present invention, the main body sheet portion contains an anti-fog material.

With the above configuration, the surface of the main body sheet portion is made hydrophilic, and fogging of the surface due to the wearer's breath or the like can be suppressed.

It is a partially enlarged rear perspective view which shows the face shield which concerns on Embodiment 1 of this invention. It is a partially enlarged front perspective view which shows the face shield shown in FIG. It is a perspective view which shows the state which the face shield of FIG. 2 is curved. It is a perspective view which shows the state which attached the face shield of FIG. It is a horizontal sectional view which shows the state which attached the face shield of FIG. It is a front view of the face shield of FIG. It is a rear view of the face shield of FIG. It is a right side view of the face shield of FIG. It is a top view of the face shield of FIG. It is a horizontal sectional view of the face shield of FIG. It is a schematic horizontal sectional view of the face shield shown in FIG. 9 is a vertical cross-sectional view of the face shield of FIG. FIG. 12 is an enlarged cross-sectional view of a molded convex portion of the face shield shown in FIG. It is an enlarged front view which shows the connecting structure of a belt part. It is a schematic plan view which shows the state of molding a plurality of face shields from one resin sheet. It is a side view which shows the conventional face protection device for medical use. It is a perspective view which shows another example of the conventional face shield. It is a perspective view which shows the use state of the face shield shown in FIG. It is a development view which shows another example of the conventional face shield. It is a perspective view which shows the use state of the face shield shown in FIG.

Hereinafter, embodiments of the face shield of the present invention will be described with reference to the drawings. However, the embodiments shown below are examples for embodying the technical idea of the present invention, and the present invention is not specified as the following. Further, the present specification does not specify the members shown in the claims as the members of the embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the embodiments are not intended to limit the scope of the present invention to the specific description unless otherwise specified, and are merely explanatory examples. It's just that. The size and positional relationship of the members shown in each drawing may be exaggerated for the sake of clarity. Further, in the following description, members of the same or the same quality are shown with the same name and reference numeral, and detailed description thereof will be omitted as appropriate. Further, each element constituting the present invention may be configured such that a plurality of elements are composed of the same member and the plurality of elements are combined with one member, or conversely, the function of one member is performed by the plurality of members. It can also be shared and realized.

The face shield of the present invention is a face shield that is attached to the wearer's face to protect the face from external foreign substances, such as droplets discharged from a patient by a medical worker in a medical field or the like. It is used to protect the face from liquids, blood, etc. However, the face shield of the present invention prevents infection between people who meet face-to-face for purposes other than medical treatment, for example, in the hospitality industry, and protects the face from foreign substances such as dust at various work sites such as factories. It can also be used for applications.

[Embodiment 1]
The face shield according to the first embodiment of the present invention is shown in FIGS. 1 to 14. FIG. 1 is a partially enlarged rear perspective view of the face shield, FIG. 2 is a partially enlarged front perspective view of the face shield, FIG. 3 is a perspective view showing a state in which the face shield of FIG. 2 is curved, and FIG. 3 is a perspective view showing a state in which the face shield is attached, FIG. 5 is a horizontal sectional view showing a state in which the face shield of FIG. 3 is attached, and FIGS. 6 to 9 are a front view, a rear view, and a right side of the face shield. 10 and 11 are horizontal and schematic horizontal cross-sectional views of the face shield of FIG. 6, and FIGS. 12 and 13 are vertical cross-sectional views and enlarged cross-sectional views of the face shield of FIG. Each is shown.

The face shield 100 shown in FIGS. 1 to 13 is made of a transparent resin having flexibility, and has a main body sheet portion 10 having a predetermined size for covering the wearer's face F and an upper portion of the main body sheet portion 10. Both sides are provided with belt portions 11 that are provided so as to project to the left and right so that the tip portions of each other can be connected to each other. The main body sheet portion 10 is between the belt portions 11 protruding to the left and right, and forms a plurality of molded convex portions 12 projecting to one side and having a hollow concave portion 13 on the back surface side. When the face shield 10 is worn by the wearer, the tip surfaces 12x of the plurality of molded convex portions 12 are brought into contact with the wearer's forehead H, and the belt portion 11 is turned around the head T so that the tip portions of each other The main body seat portion 10 is configured to be arranged apart from the face F in a curved posture in a state where the seats are connected to each other.

(Resin sheet)
The face shield 100 is manufactured by integrally connecting the main body seat portion 10 and the belt portion 11. The face shield 100 is a transparent resin sheet having flexibility, and is preferably integrally molded with one resin sheet. As described above, the structure in which the main body sheet portion and the belt portion are manufactured by one resin sheet has a feature that the manufacturing process can be reduced and mass production can be performed at low cost.

The resin sheet forming the face shield 100 is a flexible transparent resin sheet, preferably a colorless and transparent resin sheet. As such a resin, for example, polyethylene terephthalate (PET) which is a thermoplastic resin, particularly amorphous polyethylene terephthalate (A-PET) is used. The face shield 100 made of polyethylene terephthalate has features of excellent water resistance and productivity. However, a thermoplastic resin other than polyethylene terephthalate can be used as the resin for molding the face shield 100. Further, the resin for producing the face shield 100 can include an anti-fog material. As the antifogging material, for example, highly safe glycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester and the like can be used. By kneading or applying these anti-fog materials to the resin, the surface of the plastic can be made hydrophilic and the surface of the face shield 100, particularly the main body sheet portion 10, can be prevented from fogging. Therefore, it is possible to suppress the fogging of the surface due to the breath that the wearer exhales.

(Main body sheet part 10)
The main body sheet portion 10 has a size and shape that can cover the entire face in a state of being curved into a predetermined shape. The main body sheet portion 10 shown in FIGS. 1, 2, 6, and 7 has an overall shape of a substantially rectangular shape with chamfered corners at four corners. The substantially rectangular body sheet portion 10 can cover the entire face of the wearer, for example, with a vertical width of 20 cm to 50 cm, preferably 25 cm to 40 cm, and a left-right width of 20 cm to 60 cm, preferably 30 cm to 40 cm. I am doing it. Further, the main body sheet portion 10 is molded to a predetermined thickness so that the face shield 100 can be easily curved when the face shield 100 is attached to the face. The thickness of the main body sheet portion 10 is, for example, 0.1 mm to 0.4 mm, preferably 0.2 mm to 0.3 mm.

(Belt part 11)
The main body seat portion 10 is provided with belt portions 11 projecting to the left and right on both sides of the upper portion. The belt portion 11 is provided integrally connected to the main body seat portion 10. The belt portion 11 projecting to the left and right has a sufficient length and width so that the belt portion 11 can be connected while being wound around the user's head. The width of the belt portion 11 is, for example, 2 cm to 5 cm, preferably 3 cm to 4 cm, and the total length of the protrusion amount (L1 + L2 in FIG. 1) protruding from the main body sheet portion 10 is 30 cm to 40 cm. The belt portion 11 in the figure includes a first belt portion 11A connected to one side edge of the main body seat portion 10 and a second belt portion 11B connected to the other side edge of the main body seat portion 10. .. Further, in the belt portion 11 shown in FIGS. 1 and 2, one of the first belt portion 11A and the second belt portion 11B is a long belt portion 15 longer than the other, and the other is a short belt portion 16. There is.

In the face shield 100 shown in FIGS. 1, 2, and 6, the belt portion 11 provided on the first side edge 10a, which is one side edge of the main body sheet portion 10, is used as the first belt portion 11A, and the main body seat portion 10 is used. The belt portion 11 provided on the second side edge 10b, which is the other side edge of the above, is the second belt portion 11B, the first belt portion 11A is the long belt portion 15, and the second belt portion 11B is the short belt portion. It is set to 16. The belt portion shown in the figure is designed so that the long belt portion 15 is sufficiently long with respect to the short belt portion 16, and the long belt portion 15 and the short belt portion 16 are connected to each other at the tips thereof. , The connecting position 24 is located on the temporal side of the wearer, as shown in FIGS. and 5. The long belt portion 15 shown in FIG. 1 has a total length L1 of 20 cm or more, preferably 25 cm or more, which is the amount of protrusion from the main body sheet portion 10. Further, the short belt portion 16 shown in FIG. 1 has a total length L2 of 10 cm or less, which is an amount of protrusion from the main body seat portion 10, and is, for example, 4 to 6 cm.

As described above, in the structure in which one belt portion 11 is a long belt portion 15 and the other belt portion 11 is a short belt portion 16, the belt portion 11 protruding from the main body seat portion 10 is unevenly distributed on one side and provided for a long time. Therefore, it can be easily handled during storage and transportation. For example, the long belt portion 15 projecting to one side of the main body seat portion 10 can be folded back and overlapped with the main body seat portion 10 to be compactly folded. In particular, in a structure in which the main body sheet portion 10 and the belt portion 11 are manufactured from one resin sheet, the details will be described later, but by shortening one of the belt portions 11 protruding from the main body sheet portion 10, the cutting can be performed. There is a feature that the manufacturing cost can be reduced by reducing the parts to be disposed of.

Further, the belt portion 11 makes it possible to connect the tip portions of the first belt portion 11A and the second belt portion 11B to each other. The belt portion 11 of FIGS. 1 to 5 is provided with a plurality of slits 21 at the tip of the first belt portion 11A, and the tip of the second belt portion 11B has an arrowhead-shaped insertion portion that can be inserted into the slit 21. 22 is formed. As shown in FIG. 14, the plurality of slits 21 are provided at predetermined intervals apart from each other in the longitudinal direction of the belt portion 11. Each slit 21 is composed of a straight line portion 21a extending in the lateral direction and an inclined portion 21b connected to both ends of the straight line portion 21a. The inclined portions 21b at both ends are provided in a shape extending in a C shape from both ends of the straight line portion 21a toward the rear end portion side of the belt portion 11. The slit 21 having this shape has a feature that the arrowhead-shaped insertion portion 22 can be smoothly inserted from the front end side to the rear end side of the belt portion 11.

The insertion portion 22 has a chevron-shaped tip portion, and hooking portions 22a projecting outward are provided on both sides of the rear end portion. The insertion portion 22 having this shape is inserted into the slit 21 formed at the tip of the opposite belt portion 11, and the hook portions 22a on both sides are locked to both ends of the slit 21 so as not to come off. Be concatenated. The slit 21 shown in FIG. 14 is provided with inclined portions 21b at both ends, and the hooking portion 22a is guided by the inclined portions 21b and is locked so as not to come off. As a simple structure, this structure can be made such that the insertion portion 22 is surely guided to the slit 21 and cannot be pulled out in the connected state. However, both ends of the belt portion do not specify the connecting structure as the above structure. Both ends of the belt can be any other structure that can be connected to each other.

The belt portion 11 shown in FIGS. 1 to 5 is provided with a plurality of slits 21 at the tip portion of the long belt portion 15 which is the first belt portion 11A, and the tip portion of the short belt portion 16 which is the second belt portion 11B. Although the insertion portion 22 is provided in the belt portion, the belt portion may be provided with a plurality of slits in the short belt portion and the insertion portion may be provided in the tip portion of the long belt portion.

Further, the belt portion 11 shown in FIG. 14 is provided with a mark 23 for specifying the connection position of the insertion portion 22 corresponding to each slit 21 provided in the first belt portion 11A. As such a mark 23, letters, numbers, and various symbols can be adopted. The belt portion 11 shown in FIG. 14 is provided with a mark 23 made of an alphabet. These marks 23 can be formed, for example, by markings provided on a mold for forming the belt portion 11. In this way, the belt portion 11 provided with different marks 23 corresponding to each slit 21 empirically determines the optimum connection position for the size of the wearer's head from the marks 23 provided in the slit 21. By learning, when connecting the first belt portion 11A and the second belt portion 11B, it is possible to always connect at the optimum position using the specific mark 23 as a mark. As a result, the face shield 100 can always be mounted in the optimum state while shortening the time required for mounting the face shield 100. The belt portion 11 shown in the figure has an alphabet corresponding to a plurality of slits 21, and the mark 23 provided in each slit 21 has a length around the head as a number such as 50, 52, 54, 56. It can be displayed, or it can be displayed using general-purpose characters and symbols such as 2L, L, M, S, and 2S.

(Molding convex portion 12)
The main body sheet portion 10 is provided with a plurality of molded convex portions 12 between a pair of belt portions 11 provided on both side portions of the upper portion. The plurality of molded convex portions 12 are formed side by side in the left-right direction in a posture of projecting from one surface of the main body sheet portion 10, and the back surface side is a hollow concave portion 13. In the main body sheet portion 10 in the figure, a plurality of molded convex portions 12 are integrally molded by vacuum forming a flat resin sheet having a predetermined thickness. The molded convex portion 12 formed by vacuum forming a resin sheet has a concave portion 13 formed on the back surface side.

The plurality of molded convex portions 12 are formed so as to be separated from each other on a straight line connecting the left and right belt portions 11. In this way, in the structure in which the plurality of molded convex portions 12 are arranged between the left and right belt portions 11, the pulling force of the belt portions 11 is applied to each of the molded convex portions in a state where the belt portions 11 are rotated and connected to the head portion T. The tip surface 12x of the portion 12 can act as a force for pressing the forehead H, and there is a feature that a plurality of molded convex portions 12 can be stably pressed against the forehead H. Further, by arranging the plurality of molded convex portions 12 apart from each other, when the face shield 100 is attached to the face F, the main body sheet portion 10 is placed while the tips of the plurality of molded convex portions 12 are brought close to each other. It can be curved to fit the tip surfaces 12x of the plurality of molded protrusions 12 to the forehead H.

Further, by providing the plurality of molded convex portions 12 apart from each other, a gap 25 can be provided between the adjacent molded convex portions 12 as shown in FIG. 5 when the face shield 100 is attached. The gap 25 can enhance the air permeability as a ventilation gap at the time of use. Therefore, even when the user uses the spectacles, it is possible to suppress adverse effects such as fogging of the spectacles.

The molded convex portion 12 shown in FIGS. 1 to 13 is molded into a tapered shape in which the width gradually narrows in the projecting direction with respect to the sheet-shaped main body sheet portion 10. The molded convex portion 12 has a shape in which the left-right width gradually narrows in the projecting direction in the plan view shown in FIG. 9, and the vertical width gradually narrows in the projecting direction in the side view shown in FIG. It has a shape. At the time of vacuum forming, the formed convex portion 12 having this shape can be smoothly peeled off from the mold because the inclined surface having a narrowed tip becomes a draft of the mold. Further, by forming the molded convex portion 12 into a tapered shape, the inner surface shape of the concave portion 13 formed on the back surface side is also formed into a tapered shape toward the bottom of the concave portion. Therefore, when the manufactured plurality of face shields 100 are laminated with each other, the main body sheet portions 10 can be stacked and compactly stored in a state where the molded convex portions 12 are guided to the facing concave portions 13. As described above, the face shields 100 that can be laminated to each other can be thinned as a whole in a state where a large number of face shields 100 are laminated, so that there is a feature that the face shields 100 can be stored in a small space during transportation and storage.

The molded convex portion 12 shown in the figure has a substantially pyramidal trapezoidal shape having a rectangular cross-sectional shape. The molded convex portion 12 shown in the figure includes outer peripheral walls 12a and 12b formed in an upright posture with respect to the reference surface 10X of the main body sheet portion 10, and tip surfaces 12x formed at the tips of the outer peripheral walls 12a and 12b. ing. The molded convex portion 12 shown in the figure has a curved surface 18 whose rising portions of the outer peripheral walls 12a and 12b gradually become steeper toward the tip of the molded convex portion 12. The molded convex portion 12 having this structure has a curved surface 18 at the rising portion of the outer peripheral walls 12a and 12b, so that the molded convex portion 12 protrudes from the main body sheet portion 10 without providing an edge at the boundary portion with the main body sheet portion 10. As a structure in which the boundary portion between the portion 12 and the reference surface 10X of the main body sheet portion 10 is smoothly inclined, it is possible to effectively prevent cracks and cracks from occurring in this portion. In particular, since the main body sheet portion 10 including the plurality of molded convex portions 12 is curved at the rising portions of the plurality of molding convex portions 12 to bend the entire main body sheet into a predetermined shape, the rising portion of the molded convex portions 12 By reinforcing the above, there is a feature that it can be used with peace of mind while effectively preventing damage to the main body seat portion 10.

Further, the molded convex portion 12 shown in FIGS. 1 and 2 is reinforced by molding a part of the outer peripheral wall into a rib shape. In FIGS. 1 and 2, the molded convex portion 12 located at the central portion of the main body sheet portion 10 has the height of the molded convex portion 12 on the outer peripheral wall 12a located above and below as shown in the enlarged cross-sectional view of FIG. A plurality of rows of reinforcing ribs 17 extending in the direction are formed. The molded convex portion 12 shown in the figure forms a plurality of rows of reinforcing ribs 17 projecting inward by making the cross-sectional shape of the outer peripheral wall 12a substantially corrugated. Since the molded convex portion 12 having this structure can increase the strength in the height direction, the main body sheet portion 10 is stably supported while the tip surface 12x of the molded convex portion 12 is pressed against the wearer's forehead H. can. In the molded convex portion 12 shown in the figure, reinforcing ribs 17 are provided only on the upper and lower outer peripheral walls 12a, and the left and right outer peripheral walls 12b are made flat. However, the molded convex portion can also be provided with reinforcing ribs on the left and right outer peripheral walls.

Further, if the tip surface 12x of the molded convex portion 12 is too narrow, stable mounting becomes difficult, and if it is too wide, a feeling of oppression may be felt. Therefore, the tip surface 12x has a vertical width of 1 to 2 cm and a horizontal width of about 2 to 4 cm. Furthermore, by chamfering the boundary portion between the tip surface 12x and the outer peripheral surfaces 12a and 12b to form a curved surface, it is possible to reduce the discomfort to the contact portion of the wearer.

As shown in FIGS. 1 to 5, the plurality of molded convex portions 12 are a first molded convex portion 12A arranged in the intermediate portion of the main body sheet portion 10 and a second formed convex portion 12 arranged on both side portions of the main body sheet portion 10. It is composed of a molded convex portion 12B. The main body sheet portion 10 shown in the figure is provided with four molded convex portions 12 in total, two first molded convex portions 12A are provided in the intermediate portion, and one second molded convex portion is provided on each side. 12B is provided. The two first molded convex portions 12A are intermediate portions on the left and right sides of the main body sheet portion 10, and are provided in a symmetrical posture. The main body sheet portion 10 having the first molded convex portion 12A in this arrangement has the two first molded convex portions 12A symmetrically with the center line of the face F as the axis of symmetry as shown in FIGS. 3 and 5. By arranging it, it can be installed in a well-balanced manner. However, the number of the first molded convex portions of the main body sheet portion is not limited to two, and the number of the first molded convex portions may be one or three or more.

The first molded convex portion 12A is arranged on the front surface side of the face F, and the main body sheet portion 10 is arranged at a position separated from the face by a predetermined distance. Therefore, even when the wearer wears spectacles or goggles, the spectacles or goggles do not come into contact with the main body sheet portion 10 and can be used with peace of mind. Therefore, the first molded convex portion 12A arranged on the front surface side of the face F preferably has a protrusion amount of 2 cm or more so that the distance between the face F and the main body sheet portion 10 can be sufficiently maintained. It should be 2.5 cm or more. Further, if the protrusion amount of the first molded convex portion 12A becomes large, it may be difficult to stably attach the main body sheet portion 10 to the face. Therefore, the protrusion amount is preferably 5 cm or less, preferably 4. It should be 5 cm or less.

Further, the main body sheet portion 10 shown in the figure is provided with a step portion 19 formed one step higher than the main body sheet portion 10 between the two first molded convex portions 12A, and the back surface side of the step portion 19 is stepped. The recess 20 is used. As described above, in the structure in which the step portion 19 is provided between the two first formed convex portions 12A, the main body sheet portion 10 is curved between the two first formed convex portions 12A with the step portion 19 as a bending suppressing portion. It has a structure that suppresses the curvature of. In particular, since the main body sheet portion 10 shown in the figure forms the first molded convex portion 12A at a position separated from the center line to the left and right, the bending of the main body sheet portion 10 is formed between these first formed convex portions 12A. By suppressing it, there is a feature that the central portion of the front surface of the main body seat portion 10 can be suppressed from being extremely curved and can be curved to an ideal curved posture. The step portion 19 has a greater effect of suppressing bending by increasing the step height, but if the step is too large, damage such as cracking is likely to occur. Therefore, in consideration of these matters, the step height of the step portion is preferably 0.3 mm to 2 mm.

The plurality of first molded convex portions 12A are formed in the same shape, and the concave portions 13 formed on the back surface side are also formed in the same shape. The first molded convex portion 12A shown in FIG. 1 has a rectangular shape in which the tip surface 12x is in an inclined posture in a plan view. However, the first molded convex portion 12A can also be formed into an isosceles trapezoidal shape. In particular, in the main body sheet portion having an odd number of first molded convex portions, the first molded convex portions arranged on the central axis are formed in an isosceles trapezoidal shape. As a result, the main body sheet portion can be ideally arranged at a position separated from the face while arranging the plurality of first molded convex portions in a well-balanced manner on the left and right.

The main body sheet portion 10 having a rectangular planar shape of the first formed convex portion 12A has left and right outer peripheral walls 12b as inclined surfaces. The first molded convex portion 12A shown in the figure is formed so that the outer peripheral wall 12b arranged inside is formed higher than the outer peripheral wall 12b arranged outside, and the tip surface 12x is gradually lowered from the inside to the outside. It is a face. As shown in FIG. 5, in the main body sheet portion 10 provided with the first molded convex portion 12A having the above-mentioned shape, adjacent first molded convex portions 12A are mutually curved in a state where the main body sheet portion 10 is curved along the face. It is smoothly curved without interference, and the tip surface 12x of each first molded convex portion 12A can be brought into contact with the forehead H.

The second molded convex portion 12B is formed to have an average protrusion height lower than that of the first molded convex portion 12A. The second molded convex portion 12B shown in FIGS. 1 to 5 is formed in a shape in which the protruding height gradually decreases from the central side to the side edge side of the main body sheet portion 10 in a plan view. The second molded convex portion 12B shown in the figure has a substantially quadrangular planar shape, and the tip surface 12x is an inclined surface that gradually decreases from the central side toward the side edge side. As described above, in the structure in which the protruding height of the second molded convex portion 12B is gradually lowered toward the side edge of the main body seat portion 10, the main body seat portion 10 is placed on the wearer's head as shown in FIG. In the state of wearing, on the front side of the head, the central portion of the main body seat portion 10 is arranged at a predetermined distance from the face, and the main body seat portion 10 gradually approaches the head as it approaches the temporal region. It can be arranged, and in the vicinity of the temple, the main body seat portion 10 can be mounted in a posture of approaching the head. As a result, the outside of both eyes of the wearer can be reliably covered with the main body seat portion 10 to protect the wearer, and the total length of the belt portion 11 can be shortened by bringing both side portions of the main body seat portion 10 close to the head.

However, the planar shape of the second molded convex portion can be triangular. The triangular second molded convex portion has, for example, an acute angle larger than the angle formed by the side surface arranged on the center side with the main body sheet portion and the angle formed by the side surface arranged on the opposite side edge side with the main body sheet portion. And. When the main body sheet portion is attached to the second molded convex portion having this shape, the apex of the triangular second molded convex portion is brought into contact with the forehead on the center side of the main body sheet portion to form a space, while the main body is formed. On both sides of the seat portion, the inclined surface from the apex of the triangular second molded convex portion toward the side edge portion can be brought into contact with the forehead as the tip surface and arranged so as to approach the wearer's head.

Since the main body sheet portion 10 described above is provided with a plurality of molded convex portions 12 in a posture of projecting from the planar reference surface 10X, when these are laminated and stored, the concave portions facing the molded convex portions 12 are provided. While guiding to 13, the flat main body sheet portion 10 can be compactly stored in a state of being stacked in a plurality of layers.

Further, when the face shield 100 is attached to the face, the flat main body sheet portion 10 is attached while being curved. The planar main body sheet portion 10 is curved in a state where the tip surfaces 12x of the plurality of molded convex portions 12 are in contact with the wearer's forehead H, and the entire shape is along the front surface of the wearer's face in a plan view. It is deformed to be a curved surface. By being deformed into this shape, the main body sheet portion 10 can efficiently cover the wearer's face and protect it from the outside. Further, the main body seat portion 10 curved in a curved surface shape along the face F of the wearer has a feature that the shape can be stably maintained during use by being curved in a predetermined shape.

Here, since the main body sheet portion 10 shown in FIGS. 1 to 5 has a plurality of molded convex portions 12 having a tapered shape, in a state where the main body sheet portion 10 is curved, the adjacent molded convex portions 12 face each other. The sides are in close contact with each other and are smoothly curved. Further, since the main body sheet portion 10 is curved in a state where the tip surfaces 12x of the plurality of adjacent molded convex portions 12 are in contact with the wearer's forehead H, the main body sheet portion 10 is in a state of conforming to the size and shape of the face of the wearer. Curved with. Therefore, it is curved to an optimum shape for the wearer to be used and is maintained in a good wearing state. For example, in a user (for example, a large male) whose head has a large circumference and the forehead is close to a flat surface, the tip surface 12x of the adjacent molded convex portion 12 is brought into close contact with the entire surface of the forehead which is close to a flat surface. The curved shape of the main body sheet portion 10 is close to a flat surface. In this case, the user's face is also large and almost flat, so that it is effectively covered. Further, for a user (for example, a small female) whose head circumference is small and the forehead portion is close to the curved surface, the tip surface 12x of the adjacent molded convex portion 12 is in close contact with the forehead close to the curved surface. Therefore, the curved shape of the main body sheet portion 10 becomes close to an arc shape. In this case, since the user's face is small and the outer shape of the head is also small, the main body sheet portion is curved in an arc shape, so that the entire face is effectively protected. Further, by providing the plurality of molded convex portions 12 at a distance, a gap 25 serving as a ventilation gap is provided between the plurality of molded convex portions 12 whose tip surface 12x is in contact with the forehead H in a state where the face shield 100 is attached. It can be formed to improve the environment at the time of use.

As described above, the structure in which a plurality of molded convex portions 12 are provided adjacent to each other and the facing side surfaces of the formed convex portions 12 are tapered inclined surfaces is optimal for the wearer's face with the main body sheet portion 10. It is possible to realize the feature that it can be installed comfortably while being curved into a flexible shape.

The above face shield 100 is attached to the wearer's face as follows.
(1) As shown in FIG. 3, the main body sheet portion 10 is provided so as to be the tip surface 12x of the plurality of molded convex portions 12, and in particular, the tip surface 12x of the first molded convex portion 12A comes into contact with the forehead H. It is attached to the face F. Further, as shown in FIG. 5, the main body sheet portion 10 is curved so that the tip portions of the plurality of molded convex portions 12 approach each other. In the main body sheet portion 10, the tip surfaces 12x of the plurality of first molded convex portions 12A are in contact with the front surface of the forehead H, and the tip surfaces 12x of the second molded convex portions 12B on both sides are in contact with the side portions of the forehead H. The main body sheet portion 10 is curved so as to be.
(2) As shown in FIGS. 4 and 5, the tips of the left and right belt portions 11 are connected to each other at the temporal region. The belt portions 11 are brought close to each other in a state of being tightened along the circumference of the head, and are connected at a position where the optimum tension is obtained. The left and right belt portions 11 are connected by inserting the insertion portion 22 provided at one tip portion into the slit 21 provided at the other tip portion.

Further, the face shield 100 can be attached to the wearer's face as follows.
(1) As shown in FIG. 14, the tip portions of the left and right belt portions 11 are connected to each other at predetermined positions in advance. The user remembers the position of the slit 21 that matches the size of his / her head, inserts the insertion portion 22 at the position of the corresponding slit 21, and the total length of the connected belt portion 11 is a predetermined length. Set so that The belt portion 11 shown in FIG. 14 shows a state in which the insertion portion 22 is inserted into the slit 21 on which the mark 23 of “C” is displayed and connected.
(2) The tip portions of the belt portions 11 are connected to each other, and the face shield 100 formed in a ring shape by the main body seat portion 10 and the belt portion 11 is inserted into the wearer's head and set in a fixed position. .. At this time, as shown in FIG. 4, the main body sheet portion 10 is the tip surface 12x of the plurality of molded convex portions 12, and in particular, the tip surface 12x of the first molded convex portion 12A is in contact with the forehead H. It is attached to the face F. Further, at this time, as shown in FIG. 5, the main body sheet portion 10 is curved so that the tip portions of the plurality of molded convex portions 12 approach each other. In the main body sheet portion 10, the tip surfaces 12x of the plurality of first molded convex portions 12A are in contact with the front surface of the forehead H, and the tip surfaces 12x of the second molded convex portions 12B on both sides are in contact with the side portions of the forehead H. The main body sheet portion 10 is curved so as to be. The belt portions 11 are fastened along the circumference of the head so that the tip portions are brought close to each other, and are fixed to the head portion T at a position where the optimum tension is obtained.

In the face shield 100 mounted on the wearer's head as described above, the main body sheet portion 10 is tightened while the left and right belt portions 11 are pulled by the wearer's head, and a plurality of molded convex portions 12 Press with the tip surface 12x of the head in contact with the forehead H. Since the tightening direction by the belt portion 11 coincides with the direction in which the tip surface 12x of the molded convex portion 12 presses the forehead H, the main body sheet portion 10 is in a posture in which the tip surface 12x of the molded convex portion 12 is in contact with the forehead H. It is installed stably.

(Face shield manufacturing process)
In the above face shield 100, the main body sheet portion 10 and the belt portion 11 are manufactured from one resin sheet. As described above, the structure manufactured by one resin sheet has a feature that it can be mass-produced at low cost by reducing the number of manufacturing processes. As described above, in the face shield 100 manufactured from one resin sheet, as shown in FIG. 15, a plurality of face shields 100 can be manufactured with one mold. In FIG. 15, the main body sheet portion 10 of the face shield 10 and the long belt portion 15 which is one of the belt portions 11 and has a long length are arranged so as to be in point-symmetrical positions so as to be alternately arranged. It shows a state in which two face shields 100 are molded at the same time. Further, FIG. 15 shows a state in which three pairs of face shields 100 arranged point-symmetrically with each other are simultaneously molded.

The face shield 100, which is arranged at a position symmetrical to each other, is arranged so that the other long belt portion 15 is adjacent to the lower end of one main body seat portion 10. Here, the face shield 100 shown in the figure is one side edge of the main body sheet portion 10, the first side edge 10a provided with the long belt portion 15, and the lower side edge 15a of the long belt portion 15. The first curved portion 31 is formed at the boundary portion between the two, and the second curved portion 32 is formed at the boundary portion between the first side edge 10a of the main body sheet portion 10 and the lower end edge 10c of the main body sheet portion 10. In the front view of the main body sheet portion 10, the first curved line 33 formed in the first curved portion 31 and the second curved line 34 formed in the second curved portion 32 form an intermediate point P of the first side edge 10a. It is configured to form a point-symmetrical shape with the center of symmetry as the center.

As shown in FIG. 15, the face shield 100 having the main body sheet portion 10 and the long belt portion 15 having the above shape has each face when forming a plurality of face shields 100 from one resin sheet 50. By molding while arranging the main body sheet portion 10 and the long belt portion 15 constituting the shield 100 so that they are point-symmetrical to each other, it is efficiently manufactured while reducing the loss generated when the resin sheet is cut. can. In particular, the first curved line 33 of the first curved portion 31 formed at the boundary between the first side edge 10a of the main body sheet portion 10 and the lower side edge 15a of the long belt portion 15 and the main body seat portion 10 The second curved line 34 of the second curved portion 32 formed at the boundary portion between the first side edge 10a and the lower end edge 10c of the main body sheet portion 10 is set with the midpoint P of the first side edge 10a as the center of symmetry. Of the face shields 100 formed adjacent to each other, the lower end edge 10c of the main body sheet portion 10 → the second curved portion 32 → the first side edge of one of the face shields 100 is arranged in a point-symmetrical manner. 10a → first curved portion 31 → lower side edge 15a of the long belt portion 15 and a cutting line extending from the lower side edge 15a of the long belt portion 15 in the other face shield 100 → first curved portion 31 → The first side edge 10a → the second curved portion 32 → the lower end edge 10c of the main body sheet portion 10 can be matched with the extending cutting line, and the face shield 100 having the same shape can be efficiently manufactured by one cutting. As a result, these boundary portions can be cut at the same time with a single die cutting, the time required for cutting can be shortened, and mass production can be performed efficiently.

In the above face shield 100, the main body sheet portion 10 and the belt portion 11 are integrally molded from one resin sheet. The face shield 100 can be mass-produced at low cost by simplifying the manufacturing process. However, in the face shield, the belt portion can be molded as a separate member from the main body sheet portion, and the belt portion molded as a separate member can be joined by a method such as welding or adhesion to be connected to the main body sheet portion. Also in this case, the belt portion is formed of a flexible resin sheet, but the resin sheet for forming the belt portion may be made of a resin different from that of the main body sheet portion. For example, the belt portion 11 formed as a separate member from the main body sheet portion does not necessarily have to be transparent, and anti-fog property is not required. Therefore, a resin cheaper than the resin used for the main body sheet portion 10 may be used. Further, the belt portion may have a thickness different from that of the main body seat portion.

100 ... Face shield 10 ... Main body sheet portion 10X ... Reference surface 10a ... First side edge 10b ... Second side edge 10c ... Lower end edge 11 ... Belt portion 11A ... First belt portion 11B ... Second belt portion 12 ... Molded convex portion 12A ... First molded convex portion 12B ... Second molded convex portion 12x ... Tip surface 12a ... Outer peripheral wall 12b ... Outer wall 13 ... Recessed portion 15 ... Long belt portion 15a ... Lower side edge 16 ... Short belt portion 17 ... Reinforcing rib 18 ... Curved surface 19 ... Stepped portion 20 ... Stepped recess 21 ... Slit 21a ... Straight portion 21b ... Inclined portion 22 ... Insertion portion 22a ... Hooking portion 23 ... Mark 24 ... Connecting position 25 ... Gap 31 ... First curved portion 32 ... First Two curved parts 33 ... First curved line 34 ... Second curved line 50 ... Resin sheet 70 ... Face shield 71 ... Face guard part 72 ... Belt part 71 ... Face guard part 72 ... Belt part 73 ... Forehead band 73a ... Positioning hole 74 ... Connecting piece 74a ... Connecting hole 80 ... Face shield 81 ... Face guard part 82 ... Belt part 83 ... Spacer 91 ... Flat plate film 92 ... Fixing member 93 ... Spacer part F ... Face H ... Forehead T ... Head

Claims (14)

A face shield to cover the wearer's face
The main body sheet, which is made of flexible and transparent resin and has a predetermined size,
A belt portion that is provided on both sides of the upper part of the main body seat portion so as to project to the left and right so that the tip portions of each other can be connected to each other.
Equipped with
The main body sheet portion is between the belt portions protruding to the left and right, and protrudes to one surface side to form a plurality of molded convex portions having a hollow concave portion on the back surface side.
When the face shield is attached, the tip surfaces of the plurality of molded convex portions are in contact with the wearer's forehead, the belt portion is rotated around the head, and the tips thereof are connected to each other. A face shield characterized in that the seat of the main body is configured to be arranged away from the face in a curved posture. The face shield according to claim 1.
The main body sheet part
A face shield formed by forming a plurality of the molded convex portions on a straight line connecting the left and right belt portions so as to be separated from each other. The face shield according to claim 1 or 2.
A face shield in which a plurality of the molded convex portions are formed in a constricted shape. The face shield according to any one of claims 1 to 3.
The molded convex part is
The outer peripheral wall formed in an upright posture with respect to the reference surface of the main body sheet portion,
It is provided with the tip surface formed at the tip of the outer peripheral wall.
A face shield formed on the outer peripheral wall with reinforcing ribs extending in the height direction of the molded convex portion. The face shield according to any one of claims 1 to 4.
The molded convex part is
The outer peripheral wall formed in an upright posture with respect to the reference surface of the main body sheet portion,
It is provided with the tip surface formed at the tip of the outer peripheral wall.
A face shield in which the rising portion of the outer peripheral wall is a curved surface that gradually becomes steeper toward the tip of the molded convex portion. The face shield according to any one of claims 1 to 5.
The main body seat portion and the belt portion
A face shield that is integrally molded with a single resin sheet. The face shield according to any one of claims 1 to 6.
The belt part
The first belt portion connected to one side edge of the main body seat portion and
A second belt portion connected to the other side edge of the main body seat portion is provided.
Of the first belt portion and the second belt portion, one is a long belt portion longer than the other, and the other is a short belt portion.
A face shield configured such that the long belt portion and the tip end portions of the short belt portion are positioned and connected to each other on the temporal side of the wearer. The face shield according to claim 7.
A first curved portion is formed at a boundary portion between one side edge of the main body sheet portion and the first side edge provided with the long belt portion and the lower side edge of the long belt portion. ,
A second curved portion is formed at the boundary portion between the first side edge of the main body sheet portion and the lower end edge of the main body sheet portion.
In the front view of the main body sheet portion, the first curved line formed in the first curved portion and the second curved line formed in the second curved portion are centered symmetrically with respect to the midpoint of the first side edge. A face shield that is configured to form a point-symmetrical shape. The face shield according to any one of claims 1 to 8.
The belt part
The first belt portion connected to one side edge of the main body seat portion and
A second belt portion connected to the other side edge of the main body seat portion is provided.
A face shield having a plurality of slits formed in the first belt portion and an arrowhead-shaped insertion portion inserted into the slits in the second belt portion. The face shield according to claim 9.
The first belt part
A face shield provided with a mark for specifying the connection position of the insertion portion corresponding to each of the slits. The face shield according to any one of claims 1 to 10.
The plurality of the molding protrusions
The first molded convex portion arranged in the middle portion of the main body sheet portion and the first molded convex portion,
It is provided with a second molded convex portion arranged on both sides of the main body sheet portion.
A face shield in which the average height of the first molded convex portion is made higher than the average height of the second molded convex portion. The face shield according to claim 11.
In addition to providing the two first molding protrusions,
A face shield provided with one second molded convex portion on each side. The face shield according to any one of claims 1 to 12.
A face shield in which the molded convex portion is formed in a shape in which the protruding height gradually decreases from the central side to the side edge side of the main body sheet portion in a plan view. The face shield according to any one of claims 1 to 13.
A face shield in which the main body sheet portion contains an anti-fog material.

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