Mouth shield

Abstract

To provide a mouth shield which automatically opens and closes without using a wearer's hand after fitting, and allows both hands to be concentrated on eating and drinking, etc.SOLUTION: A mouth shield 10 comprises a nose frame 12, ear-hooking frames 21A and 21B, a fixed shield 30 fixed on a front face side of the nose frame 12, a first movable shield 40 rotating so as to overlap outside the fixed shield 30, a second movable shield 50 rotating so as to overlap outside the first movable shield 40, and a link member 60 having a weight 72. Angular velocity when the first movable shield 40 and the second movable shield 50 are moved is amplified more than angular velocity between when a wearer faces forward and when the wearer hangs down the wearer's head by the weight 72, and thereby the first movable shield 40 and the second movable shield 50 are opened before the wearer fully faces forward to cover the wearer's mouth, and the first movable shield 40 and the second movable shield 50 are closed before the wearer fully hangs down the wearer's head to open the wearer's mouth.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a mouth shield, and more specifically, to a hygienic mouth shield suitable for dining together. [Background technology]

[0002] Currently, in order to prevent the spread of COVID-19, it is recommended that people wear masks when dining out in a ventilated environment. When dining out with a mask, people remove their masks when eating and put them back on when chatting, but in reality, it is extremely inconvenient to remove the mask every time you bring food to your mouth or drink, and then put it back on to talk, raising doubts about whether this is being implemented reliably.

[0003] For example, a nose and mouth shield is disclosed in Patent Document 1 below to prevent direct droplets during meals. Patent Document 1 discloses that the nose and mouth shield comprises a nose shield part that covers a person's nose to cheeks, a connecting hinge provided at the bottom of the nose shield part, and a mouth shield part that covers the front of the mouth and is provided on the nose shield part via the connecting hinge so as to be vertically and rotatably movable.

[0004] Furthermore, according to the mask in Patent Document 2 below, the mask has an opening in the mask body and a blocking part that blocks the opening so that it can be opened and closed freely, and when eating or drinking, the blocking part is opened to expose the mouth through the opening, and when eating or drinking is finished, the blocking part is closed to cover the mouth. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3231132 [Patent Document 2] Utility Model Registration No. 3228351 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned Patent Document 1, the mouth shield part needs to be flipped up by hand when eating, etc., and in the technology of Patent Document 2, the occlusion part needs to be opened by hand when eating, etc. In other words, every time you bring food or drink to your mouth, you need to flip up the mouth shield part or open the occlusion part, which is the same effort as in the case of a conventional mask dining. In addition, there are concerns about hygiene because you have to touch it with your hands to open and close it.

[0007] The present invention has been made with the above in mind, and aims to provide a stress-free and hygienic mouth shield that automatically opens the shield part to cover the mouth when eating or drinking, without touching it with your hands, and automatically "covers the mouth" when talking, so that after putting it on, the shield opens and closes automatically even if you let go of it, leaving both hands free to concentrate on eating and drinking. [Means for solving the problem]

[0008] The mouth shield of the present invention comprises a nose frame having a thin frame portion that extends from near both ears of a user to the nose of the user and wide attachment portions provided on both ends of the frame portion, the frame portion being bent at the portion that rests on the nose of the user; an ear frame that is attached to the attachment portions at both ends of the nose frame and worn on the ears of the user; a fixed shield that is fixed below the frame portion of the nose frame, has a bent portion that rests on the nose of the user and has a predetermined width toward the bottom of the user's face; and a mouth shield that is substantially the same shape as the fixed shield and is attached to the fixed shield so as to overlap the outside of the fixed shield. and a link member that is rotatably connected to both ends of the nose frame, both ends of the fixed shield and both ends of the movable shield and has a weight at its lower end that is heavy enough to drive the movable shield, and the weight of the link member amplifies the angular velocity of movement of the movable shield to be greater than the angular velocity between when the user faces forward and when they look down, so that the movable shield slides open to cover the user's mouth before the user faces completely forward, and slides closed to open the user's mouth before the user looks down completely.

[0009] In one of the main forms, the movable shield includes a first movable shield having substantially the same shape as the fixed shield and supported rotatably relative to the fixed shield so as to overlap the outside of the fixed shield, and a second movable shield having substantially the same shape as the first movable shield and supported rotatably relative to the first movable shield so as to overlap the outside of the first movable shield, and the link members are rotatable relative to both ends of the nose frame, both ends of the fixed shield, and both ends of the first and second movable shields. The movable shield is movably connected to a lower end of the shield and has the weight on its lower end, and the weight of the link member amplifies the angular velocity at which the first and second movable shields move beyond the angular velocity between when the user faces forward and when the user looks down, so that the first and second movable shields slide open to cover the user's mouth before the user faces completely forward, and the first and second movable shields slide closed to open the user's mouth before the user looks down completely.

[0010] One other form is characterized in that the link member comprises a first link member and a second link member extending from approximately the center of the first link member in a direction approximately perpendicular to the first link member, one end side of the first link member is on the end side of the fixed shield and is rotatably connected with a predetermined range of motion at a position overlapping with the end of the first movable shield, and has the weight on the other end side, the link member is rotatably connected to the second movable shield with a predetermined range of motion at a position where the first link member and the second link member intersect, a tip side of the second link member is rotatably connected to an end of the nose frame, and the ends of the first movable shield and the second movable shield are rotatably connected to the ends of the nose frame.

[0011] Yet another embodiment is characterized in that an opening stopper is provided on the underside of the end of the nose frame, which abuts against the second link member and determines the open positions of the first movable shield and the second movable shield.

[0012] Yet another embodiment is characterized in that a maintenance stopper is provided below the end of the nose frame, closer to the end than the opening stopper, and abuts against the second link member to determine an opening position for maintenance where the fixed shield, the first movable shield, and the second movable shield are opened to a position where they do not overlap each other.

[0013] Yet another embodiment is characterized in that both ends of the nose frame are provided with deployment maintaining stoppers that protrude upward and are rotatable outward, maintaining the first movable shield and the second movable shield in a deployed state when the deployment maintaining stoppers are tilted outward, and a closing stopper that is provided at a position equivalent to the tip of the deployment maintaining stoppers when the deployment maintaining stoppers are raised vertically, and that maintains the first movable shield and the second movable shield in a closed position.

[0014] Yet another form is characterized in that the ear hook frame is attached to mounting portions at both ends of the nose frame, and comprises a rising portion that rises up to the top of the user's ears when worn by the user, an ear hook portion that extends from the upper end of the rising portion to a position behind the user's ears, and an earmuff portion that is movable along the ear hook portion and abuts against the rear of the user's ears.

[0015] In still another embodiment, the ear hook frame has a tip at the ear hook portion, String The shield is characterized in that it has an opening for passing an earpiece through. Still another embodiment is characterized in that the raised portion of the ear frame is foldable relative to the end of the nose frame. Still another embodiment is characterized in that at least one of the fixed shield, the first movable shield, and the second movable shield is formed of a transparent sheet, a semi-transparent sheet, or an opaque sheet.

[0016] In still another embodiment, a nose pad is provided on the inside of the bent portion of the nose frame.The above and other objects, features, and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings. Effect of the Invention

[0017] The mouth shield of the present invention includes a nose frame, a pair of ear frames, a fixed shield fixed to the front side of the nose frame, one or more movable shields that rotate to overlap the outside of the fixed shield, and a link member having a weight. The weight amplifies the angular velocity of the movable shield when it moves, more than the angular velocity between when the user turns his / her face forward and when he / she turns his / her face down, so that the movable shield opens to cover the user's mouth before the user turns completely forward, and closes to open the user's mouth before the user turns his / her face down completely.

[0018] This makes it possible to provide a stress-free and hygienic mouth shield that automatically opens the shield part to cover the mouth when eating or drinking, without the need to touch it with your hands, and automatically switches to a state where the shield part covers the mouth when talking, etc., so that after putting it on, the shield opens and closes automatically even if you let go of it, allowing you to concentrate on eating and drinking with both hands. In other words, by both parties wearing the mouth shield of the present invention, it is possible to prevent direct droplet dispersion during conversation. In spaces where ventilation is used to remove mist droplets, microdroplets, aerosols, etc., by also using the mouth shield of the present invention, it is possible to prevent direct droplet dispersion between people and to have natural conversations and meals at a normal distance from each other. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view showing an overall configuration of a mouth shield according to a first embodiment of the present invention. [Diagram 2]1A and 1B are diagrams showing the mouth shield of Example 1, in which (A) is a side view showing the positional relationship with the link member when the nose frame, fixed shield, first and second movable shields are open, and (B) is a diagram showing the positional relationship between multiple axes of the link member. [Diagram 3] 10 is a diagram showing the positional relationship of the shafts of the link members in the first embodiment, the length of the movable range, and the length of the long hole by using theoretical center lines. FIG. [Figure 4] FIG. 4 is a side view showing the positional relationship between the nose frame, the fixed shield, and the first and second movable shields of the mouth shield of the first embodiment and the link member in a closed state. [Diagram 5] 1A and 1B show the state in which the mouth shield of Example 1 is used, in which (A) shows the state in which the first and second movable shields open to cover the mouth when the face is raised, and (B) shows the state in which the first and second movable shields automatically move upward to open the mouth when the face is turned downward to eat or drink, etc. [Figure 6] 1A and 1B are diagrams showing the ear-hook frame of the mouth shield of Example 1, in which (A) is a side view showing the state of the mouth shield when the face is facing down and the position of the joining line, and (B) is a diagram showing the state in which the ear-hook frame is folded. [Figure 7] FIG. 1 shows the joint of the mouth shield of Example 1, where (A) is an exploded view of the end of the nose frame and the rising portion of the ear frame, and (B-1) to (B-3) are views of (A) cut along line #A-#A and viewed from the direction of the arrows, showing how the ear frame is gradually folded over the nose frame. [Figure 8] FIG. 11 is a perspective view showing the overall configuration of a mouth shield according to a second embodiment of the present invention. [Figure 9] 13A and 13B are diagrams showing the mouth shield of Example 2, in which (A) is a side view seen from one of the deployment maintaining stoppers when the nose frame, fixed shield, first and second movable shields are open, (B) is a partially enlarged view showing the deployment maintaining stopper, and (C) is a cross-sectional view of the deployment maintaining stopper 240A of (B) cut along line #B-#B and seen from the direction of the arrow. [Figure 10] 13A and 13B show the state in which the mouth shield of the second embodiment is used, in which (A) shows the state in which the first and second movable shields open to cover the mouth when the face is raised, and (B) shows the state in which the first and second movable shields automatically move upward to open the mouth when the face is turned downward to eat or drink, etc. [Figure 11] 11A and 11B are diagrams for explaining the function of the deployment maintaining stopper of the mouth shield of the second embodiment, in which (A) is a side view showing the state in which the first and second movable shields are open to cover the mouth and maintained by the deployment maintaining stopper, and (B) is a cross-sectional view of (A) cut along line #C-#C and viewed in the direction of the arrow. [Figure 12] 11A and 11B are diagrams for explaining the function of the closing stopper provided on the deployment maintaining stopper of the mouth shield of Example 2, in which (A) shows the state in which, when the deployment maintaining stopper is returned to the vertical position and tilted down, the first and second movable shields abut against the closing stoppers provided on the deployment maintaining stopper to determine the closed position, and (B) is a cross-sectional view of (A) cut along line #D-#D and viewed in the direction of the arrow. [Figure 13] FIG. 11 is a diagram showing a state in which the ear hook frame of the mouth shield of the second embodiment is folded. [Figure 14] FIG. 13 is a perspective view showing the configuration of a mouth shield according to a modified example of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The best mode for carrying out the present invention will be described in detail below with reference to the drawings. The mouth shield of the present invention includes a nose frame, a pair of ear frames, a fixed shield fixed to the front side of the nose frame, a first movable shield that rotates to overlap the outside of the fixed shield, a second movable shield that rotates to overlap the outside of the first movable shield, and a link member having a weight. The weight amplifies the angular velocity when the first and second movable shields move more than the angular velocity between when the user turns his face forward and when he turns his face down, so that the first and second movable shields open to cover the user's mouth before the user turns his face completely forward, and close to open the user's mouth before the user turns his face completely down.

[0021] Therefore, the shield part that covers the mouth is automatically opened without touching it when eating or drinking, and the shield part is automatically in a state where it covers the mouth when talking, etc., so that after wearing it, it automatically opens and closes even if you let go of your hands, and you can concentrate on eating and drinking with both hands, making it possible to provide a stress-free and hygienic mouth shield. Hereinafter, a detailed explanation will be given using examples. EXAMPLES

[0022] A first embodiment of the present invention will be described with reference to Figs. 1 to 7. First, the structure and operation of the mouth shield of this embodiment will be described with reference to Figs. 1 to 5. Fig. 1 is a perspective view showing the overall configuration of the mouth shield of this embodiment. Fig. 2 is a view showing the mouth shield of this embodiment, in which (A) is a side view showing the positional relationship with the link member when the nose frame, the fixed shield, and the first and second movable shields are open, and (B) is a view showing the positional relationship between the multiple axes of the link member. Fig. 3 is a view showing the positional relationship of the axes of the link member of this embodiment, the length of the movable range, and the length of the long hole by a theoretical center line. Fig. 4 is a side view showing the positional relationship with the link member when the nose frame, the fixed shield, and the first and second movable shields of the mouth shield of this embodiment are closed. Fig. 5 is a view showing the use state of the mouth shield of this embodiment, in which (A) shows the state in which the first and second movable shields open to cover the mouth when the face is raised, and (B) shows the state in which the first and second movable shields automatically move upward to open the mouth when the face is turned down.

[0023] As shown in Figs. 1 to 5, the mouth shield 10 of this embodiment includes a nose frame 12, ear hanging frames 21A and 21B, a fixed shield 30 fixed to the front side of the nose frame 12, a first movable shield 40 that rotates to overlap the outside of the fixed shield 30, a second movable shield 50 that rotates to overlap the outside of the first movable shield 40, and a link member 60 having a weight 72. The weight 72 amplifies the angular velocity when the first and second movable shields 40 and 50 move more than the angular velocity between when the user turns his / her face forward and when he / she turns his / her face down, so that the first and second movable shields 40 and 50 open to cover the user's mouth before the user turns his / her face completely forward, and the first and second movable shields 40 and 50 close to open the user's mouth before the user turns his / her face completely down.

[0024] First, the nose frame 12 has a thin frame portion 14 that extends from the vicinity of both ears 98 of a user 90 (see FIG. 5) to the nose 94 of the user 90, and wide mounting portions 18A and 18B provided at both ends of the frame portion 14. The frame portion 14 has a bent portion 16 that is bent so as to conform to the shape of the nose 94 of the user 90. The nose frame 12 is formed of, for example, a plastic material, but this does not prevent it from being formed of other materials. In this embodiment, an elastic nose pad portion 17 is provided on the inner side of the bent portion 16 (the side that contacts the nose 94 of the user 90). The nose pad portion 17 is made of, for example, a sponge body or elastic rubber.

[0025] Next, a pair of ear hook frames 21A, 21B are attached to mounting portions 18A, 18B at both ends of the nose frame 12, and have rising portions 20A, 20B that rise up to the top of the ears 98 of the user 90 when worn by the user 90, ear hook portions 22A, 22B that extend from the upper ends of the rising portions 20A, 20B to a position behind the ears 98 of the user 90, and earmuff portions 24A, 24B that are movable along the ear hook portions 22A, 22B and abut the rear of the ears 98 of the user 90.

[0026] The ear pads 24A and 24B have openings 25, and the openings 25 can be slid along the ear hooks 22A and 22B to adjust the position behind the ears 98 of the user 90. In addition to the above-mentioned position adjustment, the ear pads 24A and 24B also have the effect of assisting the nose frame 12 not to come off the nose 94 or to float up when the user 90 looks down. When the user 90 looks down, a force acts on the shield member to move forward and downward (to fall) due to its own weight. In addition, if the angular velocity of the downward facing is fast, a moment is generated that moves forward and upward (to float up) with the upper part of the ear 98 as a fulcrum. The ear pads 24A and 24B are used to prevent these in an auxiliary manner, and the main prevention is largely due to friction between the entire nose frame 12 and the face 92.

[0027] In this embodiment, openings 26A, 26B are provided at the ends of the ear hooks 22A, 22B. The openings 26A, 26B are used to pass a string or the like through them as necessary and tie them behind the head of the user 90 to prevent the mouth shield 10 from falling off when worn. Fixing the mouth shield 10 with such a string may be performed as necessary.

[0028] Next, the fixed shield 30 is fixed below the frame portion 14 of the nose frame 12, has a bent portion 32 that rests on the nose 94 of the user 90, and has a predetermined width toward the bottom of the face 92 of the user 90. The fixed shield 30 is made of, for example, a transparent sheet (such as a thin transparent plastic sheet), so that the facial expression of the user 90 can be seen even when the mouth shield 10 is worn.

[0029] Next, the first movable shield 40 has substantially the same shape as the fixed shield 30, and is supported rotatably relative to the fixed shield 30 so as to overlap the outside of the fixed shield 30. The first movable shield 40 has a bent portion 42 that rests on the nose 94 of the user 90, and has a predetermined width toward the bottom of the face 92 of the user 90. A convex portion 46 is formed on the end portion 44 side of the first movable shield 40 so as to protrude upward, and a long hole 48 is formed in the convex portion 46, through which the shaft 66 can move. Like the fixed shield 30, the first movable shield 40 is also made of a transparent sheet.

[0030] Next, the second movable shield 50 has substantially the same shape as the first movable shield 40, and is supported rotatably relative to the first movable shield 40 so as to overlap the outside of the first movable shield 40. The second movable shield 50 has a bent portion 52 that rests on the nose 94 of the user 90, and has a predetermined width toward the bottom of the face 92 of the user 90. In addition, a convex portion 56 is formed on the end portion 53 side of the second movable shield 50 so as to protrude downward, and a long hole 58 is formed in the convex portion 56, through which the shaft 70 can move. The second movable shield 50 is also made of a transparent sheet, similar to the fixed shield 30.

[0031] Next, the link member 60 is rotatably connected to the mounting portions 18A, 18B at both ends of the nose frame 12, both ends of the fixed shield, both ends 44 of the first movable shield 40, and both ends 53 of the second movable shield 50, and has a weight 72 on the lower end side.

[0032] The weight 72 of the link member 60 amplifies the angular velocity at which the first movable shield 40 and the second movable shield 50 move, compared to the angular velocity between when the user 90 faces the face 92 forward and when he or she looks down, so that the first movable shield 40 and the second movable shield 50 slide open to cover the mouth 96 of the user 90 before the user 90 faces completely forward, and the first movable shield 40 and the second movable shield 50 slide close to open the corner of the mouth 96 of the user 90 before the user 90 looks down completely.

[0033] More specifically, as shown in FIG. 2(A), the link member 60 includes a first link member 62 and a second link member 64 extending from a substantially central portion of the first link member 62 in a direction substantially perpendicular to the first link member 62. One end of the first link member 62 is connected to the end of the fixed shield 30 at a position overlapping with a protrusion 46 formed to protrude upward toward the end 44 of the first movable shield 40, and is rotatably connected with a predetermined range of motion, and has the weight 72 on the other end. The weight of the weight 72 is a necessary and sufficient weight for driving the first movable shield 40 and the second movable shield 50. As shown in FIG. 2(A), the predetermined range of motion is a width W1 within which the shaft 66 can move within the long hole 48 formed in the protrusion 46.

[0034] Furthermore, the link member 60 is rotatably connected to the second movable shield 50 with a predetermined range of motion at a position where the first link member 62 and the second link member 64 intersect. As shown in Fig. 2(A), the predetermined range of motion is a width W2 within which the shaft 70 can move within the long hole 58 of the protrusion 56 formed on the end portion 53 side of the second movable shield 50.

[0035] Furthermore, the tip side of the second link member 64 of the link member 60 is rotatably connected to the mounting portions 18A and 18B of the nose frame 12 by an axis 68, and the end portion 44 of the first movable shield 40 and the end portion 53 of the second movable shield 50 are rotatably connected to the mounting portions 18A and 18B of the nose frame 12 by an axis 54.

[0036] 2(B) shows the positional relationship of the shafts 54, 66, 68, and 70 that contribute to the rotation when the mouth shield 10 is in an open state. According to the figure, the length between the shafts 66 and 68 is defined as J, the length between the shafts 66 and 54 as K, the length between the shafts 54 and 70 as M, and the length between the shafts 68 and 70 as L.

[0037] In this case, the angular velocity of the first movable shield 40 relative to the fixed shield 30 is J / K times. Also, the angular velocity of the second movable shield 50 relative to the fixed shield 30 is L / M times. The angular velocity (and movable range) of the first movable shield 40 is set to be approximately half the angular velocity (and movable range) of the second movable shield 50.

[0038] 3(A), the range of motion R1 at the long hole 48 portion of the first movable shield 40 is the difference between the range of motion R1 of a circle centered on the shaft 68 and the range of motion R1 of a circle centered on the shaft 54, which provides the width W1 over which the shaft 66 can move within the long hole 48. Also, as shown in FIG. 3(B), the range of motion R2 at the long hole 58 portion of the second movable shield 50 is the difference between the range of motion R2 of a circle centered on the shaft 68 and the range of motion R2 of a circle centered on the shaft 54, which provides the width W2 over which the shaft 70 can move within the long hole 58.

[0039] As shown in Fig. 2(A), the weight center of gravity 74 is to the left of the fulcrum of the shaft 68 by an amount equivalent to width W3, and the weights of the first movable shield 40 and the second movable shield 50 are also added, generating a left-handed moment, which indicates that the first movable shield 40 and the second movable shield 50 of the mouth shield 10 move to the "open state" in the opposite direction to the direction indicated by the arrow in the figure. In Fig. 4, on the other hand, the weight center of gravity 74 is to the right of the fulcrum of the shaft 68 by an amount equivalent to width W4, which indicates that a right-handed moment is generated even against the weights of the first movable shield 40 and the second movable shield 50, causing the state to change from the "open state" to the "closed state".

[0040] Furthermore, in the mouth shield 10 of this embodiment, as shown in Figures 2(A) and 4, an opening stopper 76 is provided on the underside of both end portions 18A, 18B of the nose frame 12, which abuts against the second link member 64 and determines the open positions of the first movable shield 40 and the second movable shield 50.

[0041] In addition, in the mouth shield 10 of this embodiment, when the longitudinal dimensions of the long holes 48 and 58 are extended toward the center of the shield, as shown in Fig. 4, a maintenance stopper 78 is provided below the mounting parts 18A and 18B at both ends of the nose frame 12, closer to the ends than the opening stopper 76, and abuts against the second link member 64 to determine an opening position for maintenance where the fixed shield 30, the first movable shield 40, and the second movable shield 50 are opened to a position where they do not overlap each other. This allows the sheets of the fixed shield 30, the first movable shield 40, and the second movable shield 50 to be wiped clean, and the mouth shield 10 can always be kept clean.

[0042] On the other hand, in the mouth shield 10 of this embodiment, as shown in Figures 2(A) and 4, the axis 70 linked to the movable shield 50 through the long hole 58 abuts against the lower end of the movable shield 40 and the lower end of the fixed shield 30, thereby determining the closed position.

[0043] Next, the operation of the mouth shield 10 of this embodiment will be described with reference to Fig. 5. With the above-mentioned configuration, the angular velocity when the first movable shield 40 and the second movable shield 50 move is amplified compared to the angular velocity between when the user 90 turns his face 92 to the front (in the state of Fig. 5(A), when having a conversation, etc.) and when he turns his head down (in the state of Fig. 5(B), when eating and drinking, etc.), and before the user 90 turns his head completely to the front (in the state of Fig. 5(A)), the first movable shield 40 and the second movable shield 50 move to cover the mouth 96 of the user 90, and before the user 90 turns his head completely down (in the state of Fig. 5(B)), the first movable shield 40 and the second movable shield 50 close and the mouth of the user 90 opens.

[0044] As a result, a stress-free and hygienic mouth shield 10 can be provided, in which the shield part for covering the mouth 96 automatically opens without touching it when eating or drinking, and the shield part automatically covers the mouth 96 when talking, etc., so that after putting it on, the opening and closing action is automatic even if the hands are taken off, leaving both hands free to concentrate on eating and drinking.

[0045] In addition, the mouth shield 10 of this embodiment is configured such that the ear frames 21A and 21B can be folded relative to the nose frame 12. Fig. 6 shows the ear frames of the mouth shield of this embodiment, (A) is a side view showing the state of the mouth shield 10 when the face is turned down and the position of the joining line L of the ear frames, and (B) is a view showing the state in which the ear frames are folded. Fig. 7 shows the joining parts of the mouth shield of this embodiment, (A) is an exploded view showing the end of the nose frame and the rising part of the ear frames, and (B-1) to (B-3) are views showing the state in which the ear frames are gradually folded relative to the nose frame, cut along the line #A-#A in (A) and viewed from the direction of the arrows.

[0046] 7(A), the upper end of the mounting portion 18A of the nose frame 12 is cut obliquely to form a joint L1, and a protrusion 100 having a through hole 102 is formed in the center of the joint L1. The lower end of the rising portion 20A of the ear hook frame 21A is cut obliquely to form a joint L2, and a protrusion 104 having a through hole 106 and a protrusion 108 having a through hole 110 are formed on both ends of the joint L2. A recess 112 into which the protrusion 100 of the mounting portion 18A of the nose frame 12 fits is formed in the center of the joint L2.

[0047] Then, the convex portion 100 of the mounting portion 18A of the nose frame 12 is fitted into the concave portion 112 of the rising portion 20A of the ear frame 21A, and the pin 120 shown in Fig. 7(B-1)-(B-3) is inserted into the through holes 106, 102, and 110, so that the rising portion 20A of the ear frame 21A can be folded by rotating it around the pin 120 with respect to the mounting portion 18A of the nose frame 12, as shown in Fig. 7(B-1)-(B-3). The same applies to the rising portion 20B of the other ear frame 21B. The widths of the convex portions 104 and 108 and the convex portion 100 (and the number of convex portions themselves) may be determined in consideration of the frame strength at the time of joining.

[0048] The folded state of the ear hook frames 21A and 21B is shown in Fig. 6(B) . By folding them in this manner, the storage space can be made compact and they are convenient to carry.

[0049] <Effects> As described above, the mouth shield 10 of the first embodiment includes the nose frame 12, the ear frames 21A and 21B, the fixed shield 30 fixed to the front side of the nose frame 12, the first movable shield 40 that rotates to overlap the outside of the fixed shield 30, the second movable shield 50 that rotates to overlap the outside of the first movable shield 40, and the link member 60 having the weight 72. The weight 72 amplifies the angular velocity at which the first and second movable shields 40, 50 move, compared to the angular velocity between when the user 90 turns his face 92 forward and when he turns his face down, so that the first and second movable shields 40, 50 open to cover the mouth of the user 90 before the user 90 turns his face completely forward, and the first and second movable shields 40, 50 close to open the mouth of the user 90 before the user 90 turns his face completely down.

[0050] Therefore, the shield part for covering the mouth 96 automatically opens without touching it with your hands when eating or drinking, and automatically covers the mouth 96 when talking, so that after putting it on, the opening and closing action is automatic even if you let go of the shield, allowing you to concentrate on eating and drinking with both hands, providing a stress-free and hygienic mouth shield.

[0051] Furthermore, the mouth shield 10 of this embodiment automatically opens and closes with the natural tilt of the head during dining (when talking (head slightly downward to facing forward (when checking the other person's gaze)) and when eating silently (facing downward (when checking the food with your gaze)). This opening and closing action is a sliding open and closed operation, so even when the mouth shield 10 is in the open state, it does not protrude forward and does not take up space. When drinking beverages from a cup, by raising the face while holding the cup in the mouth with the head facing downward, the movable shields 40 and 50 are naturally pushed up by the cup, allowing the beverage to be consumed without hindrance.

[0052] Furthermore, since the mouth shield 10 of this embodiment is configured such that the fixed shield 30 and the movable shields 40 and 50 are made of transparent lightweight materials, facial expressions around the mouths of each other can be seen.

[0053] Furthermore, the mouth shield 10 of this embodiment does not cover the eyes, so there is a sense of freedom, and glasses can be used in combination with the mouth shield, and the view downward (toward food, etc.) is not obstructed much.

[0054] By both wearing the mouth shield 10 of this embodiment, it is possible to prevent direct droplet dispersion during conversation. In a space where ventilation is used to remove mist droplets, micro droplets, aerosols, etc., the mouth shield 10 of this embodiment can also be used to prevent direct droplet dispersion, allowing for natural face-to-face conversation or dining at a normal distance. EXAMPLES

[0055] Next, a second embodiment of the present invention will be described with reference to Figs. 8 to 13. The same or corresponding components as those in the first embodiment will be denoted by the same reference numerals (similar to other modified examples). Fig. 8 is a perspective view showing the overall configuration of the mouth shield of the second embodiment. Fig. 9 is a view showing the mouth shield of the second embodiment, in which (A) is a side view seen from one of the deployment maintaining stoppers in a state where the first and second movable shields are open, (B) is a partially enlarged view showing the deployment maintaining stopper, and (C) is a cross-sectional view of the deployment maintaining stopper 240A of (B) cut along the line #B-#B and seen from the direction of the arrow. Fig. 10 is a view showing the use state of the mouth shield of the second embodiment, in which (A) shows a state where the first and second movable shields open to cover the mouth when the face is raised, and (B) shows a state where the first and second movable shields automatically move upward to open the mouth when the face is turned downward for eating or drinking.

[0056] Fig. 11 is a functional explanatory diagram of the deployment maintaining stopper of the mouth shield of Example 2, (A) is a side view showing a state in which the first and second movable shields are opened to cover the mouth and maintained by the deployment maintaining stopper, (B) is a cross-sectional view of (A) cut along line #C-#C and viewed in the direction of the arrow. Fig. 12 is a functional explanatory diagram of the closing stopper provided on the deployment maintaining stopper of the mouth shield of Example 2, (A) shows a state in which the first and second movable shields abut against the closing stopper provided on the deployment maintaining stopper when the deployment maintaining stopper is returned vertically and the head is lowered, and (B) is a cross-sectional view of (A) cut along line #D-#D and viewed in the direction of the arrow. Fig. 13 is a diagram showing a state in which the ear hook frame of the mouth shield of Example 2 is folded.

[0057] As shown in Figs. 8 to 13, the mouth shield 200 of the second embodiment includes a nose frame 12, ear frames 21A and 21B, a fixed shield 30 fixed to the front side of the nose frame 12, a first movable shield 40 that rotates to overlap the outside of the fixed shield 30, a second movable shield 50 that rotates to overlap the outside of the first movable shield 40, and a link member 60 having a weight 72A. The weight 72A amplifies the angular velocity when the first and second movable shields 40 and 50 move more than the angular velocity between when the user turns his / her face forward and when he / she turns his / her face down, so that the first and second movable shields 40 and 50 open to cover the user's mouth before the user turns his / her face completely forward, and the first and second movable shields 40 and 50 close to open the user's mouth before the user turns his / her face completely down.

[0058] First, the nose frame 12 has a thin frame portion 14 that extends from the vicinity of both ears 98 of a user 90 (see FIG. 5) to a nose 94 of the user 90, and wide mounting portions 18A, 18B that are provided on both ends of the frame portion 14. In this embodiment, the corners of the mounting portions 18A, 18B are cut off, eliminating the need for a portion for providing the maintenance stopper 78 described in the first embodiment above.

[0059] The frame portion 14 has a nose contact portion 202 in which a portion that rests on the nose 94 of the user 90 is bent to conform to the shape of the nose 94. The nose frame 12 is formed, for example, from a plastic material, but this does not prevent it from being formed from other materials. In this embodiment, the nose contact portion 202 is formed by shaping the material that forms the frame portion 14 itself so that it abuts against both ends of the nose. Furthermore, in this embodiment, notches 230A, 230B are provided on both sides of the nose contact portion 202 for providing deployment maintaining stoppers 240A, 240B, which will be described later.

[0060] Next, a pair of ear hook frames 21A, 21B are attached to mounting parts 18A, 18B at both ends of the nose frame 12, and have rising parts 20A, 20B that rise up to the top of the ears 98 of the user 90 when worn by the user 90, ear hook parts 22A, 22B that extend from the upper ends of the rising parts 20A, 20B to a position behind the ears 98 of the user 90, and ear pad parts 214A, 214B that are movable along the ear hook parts 22A, 22B and come into contact with the rear of the ears 98 of the user 90. The ear pad parts 214A, 214B are shaped to taper toward the tip.

[0061] The ear hooks 22A, 22B of the nose frame 12 are provided with earmuffs 214A, 214B that can slide along the ear hooks 22A, 22B. The upper and lower inside edges of the ear hooks 22A, 22B are chamfered, and the ear hooks 214A, 214B are formed into a substantially C-shape by cutting out a part of the ring (the side that comes into contact with the user when worn), and are composed of attachment parts 216A, 216B having openings 218A, 218B that can slide along the ear hooks 22A, 22B, and bent parts 220A, 220B that narrow downward from the attachment parts 216A, 216B and are bent.

[0062] The inside of the openings 218A, 218B is roughly C-shaped (with small protrusions on the top and bottom), so they pinch the upper and lower chamfered parts on the inside of the ear hook parts 22A, 22B and do not come off to the outside. By pinching these small protrusions and the top and bottom of the mounting parts 216A, 218B with a negative clearance, sliding friction is applied, and the ear pad parts 214A, 214B can be slid to the desired position and maintained in that position.

[0063] The angle α (see FIG. 14) of the bent portions 220A, 220B is set, for example, at about 20° toward the rear of the head of the user 90. Such earmuffs 214A, 214B are shorter than the earmuffs 24A, 24B of the above-mentioned embodiment 1, and since the inner side is cut out, it is possible to reduce discomfort when wearing the earmuffs, and therefore it is possible to reduce the burden on the ears even when the mouth shield 200 is used for a long time. In addition, 214A, 214B may be tilted inward (toward the user 90) by about 15° to make the wearing more stable. Other basic actions and effects are the same as those of the above-mentioned embodiment 1.

[0064] In this embodiment, openings 208A, 208B are provided at the ends of the ear hooks 22A, 22B. The openings 208A, 208B are used to pass a string or the like through them as necessary and tie them behind the head of the user 90 to prevent the mouth shield 200 from falling off when worn. Fixing with such a string may be performed as necessary.

[0065] Next, the fixed shield 30 is fixed below the frame portion 14 of the nose frame 12, has a bent portion 32 that rests on the nose 94 of the user 90, and has a predetermined width toward the lower side of the face 92 of the user 90. The fixed shield 30 is made of, for example, a transparent sheet (such as a transparent thin plastic sheet), so that the facial expression of the user 90 can be seen even when the mouth shield 200 is worn. The configurations of the first movable shield 40 and the second movable shield 50 are basically the same as those of the above-mentioned embodiment 1, and therefore details will be omitted.

[0066] Next, the link member 60 is rotatably connected to the mounting portions 18A and 18B at both ends of the nose frame 12, both ends of the fixed shield, both ends 44 of the first movable shield 40, and both ends 53 of the second movable shield 50, and has a weight 72A on the lower end side. The weight 72A in this embodiment is substantially circular.

[0067] The weight 72A of the link member 60 amplifies the angular velocity at which the first movable shield 40 and the second movable shield 50 move, compared to the angular velocity between when the user 90 turns his face 92 forward and when he turns his face down, so that the first movable shield 40 and the second movable shield 50 slide open to cover the mouth 96 of the user 90 before the user 90 turns his face completely forward, and the first movable shield 40 and the movable shield 50 slide close to open the mouth 96 of the user 90 before the user 90 turns his face completely down. The configuration of the link member 60 is basically the same as that of the above-mentioned first embodiment, so details are omitted. Depending on the structure of the shafts 66 and 70, the shafts 66 and 70 may come into contact with the end of the shield adjacent to the inside during the sliding operation, but a sliding guide for smoothly accommodating this may be provided at the upper end of the fixed shield 30 and the lower end of the first movable shield 40, where the shafts 66 and 70 pass.

[0068] Furthermore, in the mouth shield 200 of this embodiment, as shown in Figure 8, etc., an opening stopper 76 is provided on the underside of both end portions 18A, 18B of the nose frame 12, which abuts against the second link member 64 and determines the open positions of the first movable shield 40 and the second movable shield 50.

[0069] In addition, in the mouth shield 200 of this embodiment, by extending the longitudinal dimensions of the long holes 48 and 58 toward the center of the shield, the mouth shield 200 can be opened to a position where it passes over the opening stopper 76 on the lower side of the mounting parts 18A and 18B at both ends of the nose frame 12 as shown in Fig. 8, and the sheets of the fixed shield 30, the first movable shield 40, and the second movable shield 50 can be wiped clean to keep the mouth shield 200 clean at all times. Note that this does not prevent the provision of a maintenance stopper 78 for providing such a maintenance position (see the dashed lines in Figs. 11(A) and 12(A)).

[0070] Next, the development maintaining stoppers 240A and 240B of this embodiment will be described with reference to FIG. 9. FIG. 9(A) shows a side view of one development maintaining stopper 240A, but as shown in FIG. 9(B), the other development maintaining stopper 240B has a similar configuration. As shown in FIGS. 9(A) and (B), the development maintaining stoppers 240A and 240B of this embodiment are generally U-shaped, and both ends are provided in the notches 230A and 230B provided in the nose frame 12 via shafts 244A and 244B. As shown in FIG. 9(B), the development maintaining stoppers 240A and 240B are biased left and right, and as shown in FIG. 9(C) for the development maintaining stopper 240A, they are rotatable about the shaft 244A. Similarly, the other development maintaining stopper 240B is rotatable about the shaft 244B. At the center of such deployment maintaining stoppers 240A, 240B, closing stoppers 242A, 242B are provided which protrude outward when the stoppers are raised vertically.

[0071] Of the functions of the mouth shield 200 of Example 2 shown in Figures 10(A) and (B), the opening and closing movement of the movable shield in response to the up and down movement of the face 92 of the user 90 when eating and drinking is the same as that of the mouth shield 10 of Example 1, so a description thereof will be omitted.

[0072] Next, the functions of the deployment maintaining stoppers 240A, 240B and the closing stoppers 242A, 242B of the mouth shield 200 of this embodiment will be described with reference to Figures 11 and 12. As shown in Figure 11(A), when the fixed shield 30, the first movable shield 40, and the second movable shield 50 are in the open state, the deployment maintaining stopper 240A can be tilted outward with the shaft 244A as a fulcrum, so that each shield can be maintained in the open state even when the head is lowered, as shown in Figure 11(B). Such maintenance of the open state can be achieved by tilting either one or both of the deployment maintaining stoppers 240A and 240B.

[0073] Figures 12(A) and (B) show that when the deployment maintaining stoppers 240A, 240B are returned to the vertical position and tilted down, the first movable shield 40 and the second movable shield 50 abut against the closing stoppers 242A, 242B provided in the center of the deployment maintaining stoppers 240A, 240B, thereby determining the closed position.

[0074] Also, the mouth shield 200 of this embodiment is similar to the above-mentioned embodiment 1 in that the ear frames 21A, 21B are configured to be foldable with respect to the nose frame 12. Also, the effect of this embodiment is similar to that of the above-mentioned embodiment 1, but in addition to that, this embodiment has the effect of maintaining the open state even when the wearer looks down by providing the deployment maintaining stoppers 240A, 240B, and of determining the closed position when the wearer looks down by providing the closing stoppers 242A, 242B.

[0075] Furthermore, as shown by the two-dot dashed line in Fig. 13, a sticker 250 indicating how to use the mouth shield 200 and other precautions may be provided on the rising portion 20A (or 20B), and the contents of the instructions may be changed as appropriate. By attaching such a sticker 250 in a position that is visible when the ear hanging frames 21A, 21B are folded, as shown in Fig. 13, it is possible to check precautions before use.

[0076] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, the following modifications are also included. (1) The materials and shapes of the nose frame 12, fixed shield 30, first movable shield 40, and second movable shield 50 shown in the above embodiment are only examples, and can be changed as appropriate within a range that produces the same effects. (2) The mouth shield 10 shown in the above embodiment is also one example. For example, at least a portion of the lower end of the fixed shield 30 is folded and at least a portion of the upper end of the first movable shield 40 is folded so as to engage with each other when the mouth shield 10 is opened. Similarly, at least a portion of the lower end of the first movable shield 40 is folded and at least a portion of the upper end of the second movable shield 50 is folded so as to engage with each other when the mouth shield 10 is opened. As a result, when the mouth shield 10 is opened, each shield component overlaps with each other, thereby reliably covering the mouth.

[0077] (3) In the above embodiment, the ear hanging frames 21A, 21B are foldable, but this is only one example and they may be folded as needed. The ear hanging frames 21A, 21B may also be detachable from the nose frame 12. Furthermore, the length of the ear pads 24A, 24B is also only one example and may be changed as needed, for example, to be shorter than that shown in FIG. (4) The link member 60 shown in the above embodiment is also one example, and may be modified in design as appropriate within the scope of achieving the same effect. (5) The transparency of each shield shown in the above embodiment is merely an example. One or more shields may be transparent, semi-transparent, or opaque, or all shields may be transparent, semi-transparent, or opaque. (6) A modified example of the present invention is shown in Fig. 14. In the mouth shield 200A shown in Fig. 14, the fixed shield 30A, the first movable shield 40A, and the second movable shield 50A are made of an opaque or semi-transparent material, and the facial expression of the user can be hidden. In addition, the present invention is not limited to the example shown in Fig. 14, and the nose frame 12, the deployment maintaining stoppers 240A, 240B, the attachment parts 18A, 18B, the rising parts 20A, 20B, the ear hanging frames 21A, 21B, and the ear pad parts 214A, 214B may be transparent, semi-transparent, or opaque. [Industrial Applicability]

[0078] According to the present invention, a nose frame, a pair of ear frames, a fixed shield fixed to the front side of the nose frame, one or more movable shields that rotate to overlap the outside of the fixed shield, and a link member having a weight are provided. The weight amplifies the angular velocity of the movable shield when it moves, more than the angular velocity between when the user turns their face forward and when they turn their face down, so that the movable shield opens to cover the user's mouth before the user turns completely forward, and closes to open the user's mouth before the user turns their face down completely.

[0079] As a result, the shield part that covers the mouth automatically opens when eating or drinking, without the need to touch it, and automatically returns to a state where it covers the mouth when talking, etc. Once put on, the shield opens and closes automatically even if you let go of it, allowing both hands to be used solely for eating and drinking, which is stress-free and hygienic, and can be used as a mouth shield. [Explanation of symbols]

[0080] 10: Mouth shield 12: Nose frame 14: Frame section 16: Bend 17: Nose pad 18A, 18B: Mounting part 20A, 20B: Rising section 21A, 21B: Ear hook frame 22A, 22B: Ear hook 24A, 24B: Earmuffs 25, 26A, 26B: Opening 30, 30A: Fixed shield 32, 42, 52: Bends 40, 40A: First movable shield 44, 53: End 46, 56: Convex 48, 58: Long hole 50, 50A: Second movable shield 54, 66, 68, 70: Axis 60: Link material 62: First link member 64: Second link member 72, 72A: Weight 74: Center of gravity of weight 76: Open stopper 78: Maintenance stopper 90:User 92: Face 94: Nose 96: Mouth 98: Ear 100, 104, 108: Convex 102, 106, 110: Through holes 112: Recess 120: Pin 200, 200A: Mouth shield 202:Nose contact part 208A, 208B: Opening 214A, 214B: Earmuffs 216A, 216B: Mounting parts 218A, 218B: Opening 220A, 220B: Bent part 230A, 230B: Notch 240A, 240B: Deployment maintenance stopper 242A, 242B: Close stopper 244A, 244B: Axis 250: Seal α: Angle L: Joining line L1, L2: Joint R1, R2: Range of motion W1~W4: Width

Claims

1. a nose frame having a thin frame portion that is placed from the vicinity of both ears of a user to the nose of the user and wide attachment portions provided on both ends of the frame portion, the portion of the frame portion that is placed on the nose of the user being bent; an ear-hanging frame attached to the attachment portions at both ends of the nose frame and worn on the ears of the user; a fixed shield that is fixed to a lower portion of a frame portion of the nose frame, has a bent portion that rests on the nose of the user, and has a predetermined width toward a lower portion of the face of the user; a movable shield having substantially the same shape as the fixed shield and supported rotatably relative to the fixed shield so as to overlap the outer side of the fixed shield; a link member rotatably connected to both ends of the nose frame, both ends of the fixed shield, and both ends of the movable shield, the link member having a weight on the lower end side that is heavy enough to drive the movable shield; In addition to providing This mouth shield is characterized in that the weight of the link member amplifies the angular velocity of movement of the movable shield to be greater than the angular velocity between when the user faces forward and when they look down, so that the movable shield slides open to cover the user's mouth before the user faces completely forward, and slides closed to open the user's mouth before the user looks completely down.

2. The movable shield is a first movable shield having substantially the same shape as the fixed shield and supported rotatably relative to the fixed shield so as to overlap the outer side of the fixed shield; a second movable shield having substantially the same shape as the first movable shield and supported rotatably relative to the first movable shield so as to overlap an outer side of the first movable shield; Including, The link member is the shield is rotatably connected to both ends of the nose frame, both ends of the fixed shield, and both ends of the first movable shield and the second movable shield, and has the weight on a lower end side; The mouth shield of claim 1, characterized in that the weight of the link member amplifies the angular velocity at which the first movable shield and the second movable shield move beyond the angular velocity between when the user faces forward and when the user faces down, so that the first movable shield and the second movable shield slide open to cover the user's mouth before the user faces completely forward, and the first movable shield and the second movable shield slide closed to open the user's mouth before the user faces down completely.

3. The link member includes a first link member and a second link member extending from a substantially central portion of the first link member in a direction substantially perpendicular to the first link member. It is equipped with one end side of the first link member is on the end side of the fixed shield and is rotatably connected to the end of the first movable shield at a position overlapping the end of the first movable shield with a predetermined range of motion, and has the weight on the other end side, At a position where the first link member and the second link member intersect, the link member is rotatably connected to the second movable shield with a predetermined range of motion, a tip side of the second link member is rotatably connected to an end of the nose frame, 3. The mouth shield according to claim 2, wherein ends of the first movable shield and the second movable shield are pivotally connected to ends of the nose frame.

4. The mouth shield according to claim 3, characterized in that an opening stopper is provided on the underside of the end of the nose frame, which abuts against the second link member and determines the open position of the first movable shield and the second movable shield.

5. The mouth shield according to claim 4, characterized in that a maintenance stopper is provided below the end of the nose frame, closer to the end than the opening stopper, abuts against the second link member, and determines an opening position for maintenance where the fixed shield, the first movable shield, and the second movable shield are opened to a position where they do not overlap each other.

6. a deployment maintaining stopper that protrudes upward from both ends of the nose frame, is rotatable outward, and maintains the first movable shield and the second movable shield in a deployed state when the first movable shield and the second movable shield are tilted outward; a closing stopper that is provided at a position corresponding to a tip end of the deployment maintaining stopper when the deployment maintaining stopper is raised vertically and that maintains the first movable shield and the second movable shield in a closed position; 6. The mouth shield according to claim 4 or 5, further comprising:

7. The ear hook frame is A rising portion is attached to the mounting portions at both ends of the nose frame, and when worn by the user, the rising portion rises up to the top of the user's ears; an ear hook portion extending from an upper end of the rising portion to a position behind the user's ear; The mouth shield according to any one of claims 1 to 6, further comprising an earmuff portion that is movable along the ear hook portion and abuts against the rear of the user's ear.

8. The mouth shield according to claim 7, characterized in that an opening for passing a string is provided at a tip of the ear hook portion of the ear hook frame.

9. The mouth shield according to any one of claims 1 to 8, characterized in that the raised portions of the ear frames are foldable relative to the ends of the nose frames.

10. The mouth shield according to any one of claims 1 to 9, characterized in that at least one of the fixed shield and the movable shield is formed of a transparent sheet, a translucent sheet, or an opaque sheet.

11. The mouth shield according to any one of claims 1 to 10, characterized in that a nose pad is provided on the inside of the bent portion of the nose frame.

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