Lens-adjustable mask

Abstract

The utility model relates to a lens-adjustable mask, which is used in a non-water environment and is characterized by comprising a mask main body, a lens and a lens, lenses are arranged at eye windows of the mask main body, and flexible vision correction patches are detachably arranged at the lenses; the flexible vision correction patches are pasted on the inner side surfaces or the outer side surfaces of the lenses, and the flexible vision correction patches are made of silica gel materials. According to the utility model, the vision correction paste is arranged on the lens, and the vision correction paste can be an approximate lens, a hyperopia lens or other lenses with a vision correction function, so that a user is prevented from additionally wearing glasses when wearing the mask, and the wearing convenience and safety are improved; therefore, the working efficiency and the application range of the mask are further improved.

Description

Technical Field

[0001] This utility model relates to the field of face mask technology; specifically, this utility model relates to a face mask with adjustable lenses. Background Technology

[0002] Face masks, such as gas masks, are essential equipment in firefighting, protecting firefighters and other personnel from toxic substances during operations. However, existing gas masks are generally universal, with a transparent window for the user to observe the outside environment.

[0003] For users with nearsightedness, farsightedness, or other conditions requiring eyeglasses, face masks are inconvenient to use. Wearing framed glasses can affect the seal of the face mask, while wearing contact lenses can slow down the wearing process. Furthermore, the harsh working conditions in which face masks are worn during firefighting or other emergency rescue operations necessitate careful consideration of the stability of the eyeglasses during installation and wear.

[0004] Therefore, there is an urgent need for a new mask structure to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable lens face mask that can solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0006] To achieve the aforementioned objectives, the present invention adopts the following technical solution:

[0007] The first aspect of this utility model provides a lens-adjustable face mask, which is used in non-aquatic environments, and includes: a face mask body;

[0008] The mask body has a lens at the eye window, and a flexible vision correction patch is detachably installed at the lens; an air inlet is provided on the side of the mask body, and a filter unit is provided at the air inlet; an air outlet is provided below the eye window of the mask body, and a one-way air outlet valve is provided at the air outlet; the cross-sectional area of ​​the air outlet is larger than the cross-sectional area of ​​the air inlet.

[0009] The flexible vision correction patch is attached to the inner or outer surface of the lens, and the flexible vision correction patch is made of silicone material.

[0010] The lens has a receiving groove, the shape of which matches the shape of the flexible vision correction patch, and the flexible vision correction patch is adhered to the receiving groove.

[0011] This application features a detachable flexible vision correction patch at the lens, allowing users to select the appropriate patch based on their vision. The flexible vision correction patch can be a silicone myopia lens or a silicone hyperopia lens, or other silicone lens patches with vision correction functions. By incorporating the flexible vision correction patch, myopic or hyperopic users do not need to wear additional glasses when using the mask, ensuring a tight seal.

[0012] While silicone lens protectors can be bonded to lenses using water, this application is suitable for non-aqueous environments. However, in high-temperature scenarios, the moisture used to bond the silicone lens protector to the lens can evaporate, causing them to detach. This application addresses this by providing a corresponding receiving groove on the lens. The silicone lens protector is placed within this groove, with its shape matching the groove's shape. This prevents moisture evaporation between the silicone lens protector and the lens, and the receiving groove also limits the silicone lens protector's position, resulting in a more secure installation.

[0013] In this application, the cross-sectional area of ​​the air outlet is larger than that of the air inlet, ensuring that the user can breathe more smoothly when wearing the mask.

[0014] In some feasible ways, the flexible vision correction patch is a myopia correction patch or a hyperopia correction patch.

[0015] In some possible implementations, the filter unit includes a housing with a receiving cavity formed inside the housing, the receiving cavity communicating with the interior of the mask body, and a filter medium disposed within the receiving cavity.

[0016] By installing a filter medium inside the containment cavity, it is possible to filter outside air and prevent users from being harmed by toxic gases from the outside world when using the mask.

[0017] In some feasible embodiments, the filter medium is at least two of activated carbon filter cotton, non-woven filter cotton, glass fiber filter cotton, and synthetic fiber filter cotton.

[0018] The filter medium is a combination of various materials, which can improve the filtration effect of the gas and ensure the cleanliness of the gas inhaled into the mask.

[0019] In some feasible embodiments, the housing is a cylindrical structure, with an external thread at the air intake end and an internal thread facing the air intake end. The housing is detachably connected to the air intake end through the engagement of the internal thread and the external thread.

[0020] In this application, the housing and the air inlet are connected by threads, which facilitates the replacement of the filter material, improves the practicality and flexibility of the mask, and thus enhances the user experience.

[0021] The second aspect of this utility model provides an adjustable lens face mask for use in non-aquatic environments. The face mask includes: a face mask body; a lens disposed at the eye window of the face mask body, the lens being detachably connected to the eye window; an air inlet disposed on the side of the face mask body, the air inlet being provided with a filter unit; an air outlet disposed below the eye window of the face mask body, the air outlet being provided with a one-way air outlet valve; and the cross-sectional area of ​​the air outlet being larger than the cross-sectional area of ​​the air inlet.

[0022] The eye window includes a first eye window and a second eye window. The first eye window and the second eye window are symmetrically arranged along the center line of the mask body. A first lens and a second lens are detachably installed at the first eye window and the second eye window, respectively. The first lens and the second lens are vision correction lenses.

[0023] In this application, a first lens and a second lens are detachably mounted at the first and second eye windows, allowing the user to select the appropriate lens based on their vision. The first and second lenses can be myopic or hyperopic lenses, or other lenses with vision correction functions. By providing detachable first and second lenses, myopic or hyperopic users do not need to wear additional glasses when using the mask, ensuring a tight seal when wearing the mask.

[0024] In this application, the cross-sectional area of ​​the air outlet is larger than that of the air inlet, ensuring that the user can breathe more smoothly when wearing the mask.

[0025] In some feasible embodiments, a first mounting support and a second mounting support are also included, wherein the first lens is mounted on the first mounting support, the second lens is mounted on the second mounting support, the first mounting support is detachably connected to the first eye window, and the second mounting support is detachably connected to the second eye window.

[0026] The first and second mounting supports serve as mounting carriers for the first and second lenses, respectively, enabling detachable installation between the first and second lenses and the mask body. This improves the ease of installation and allows users to quickly put on the mask.

[0027] In some feasible ways, the first eye window and the second eye window have the same structure, the first mounting support and the second mounting support have the same structure, the first lens and the second lens have the same structure, and the first mounting support and the second mounting support are annular support structures with openings at both ends;

[0028] The first lens is fixedly installed at one end of the first mounting support. The first eye window is provided with a first fastening part along its circumference. The other end of the first mounting support is fastened to the outer periphery of the first fastening part. A first annular sealing strip is installed between the first mounting support and the first fastening part. The first annular sealing strip is compressed between the first mounting support and the first fastening part.

[0029] The second lens is fixedly installed at one end of the second mounting support. The second eye window is provided with a second fastening part along its circumference. The other end of the second mounting support is fastened to the outer periphery of the second fastening part. A second annular sealing strip is installed between the second mounting support and the second fastening part. The second annular sealing strip is compressed between the second mounting support and the second fastening part.

[0030] This application provides a first annular sealing strip and a second annular sealing strip. The annular sealing strip enhances the reliability of the connection between the mounting support and the fastening part, and ensures the airtightness of the mask body, preventing external gas from seeping into the mask through the eye windows.

[0031] In some feasible implementations, the cross-sections of both the first eye window and the second eye window are circular;

[0032] The inner sidewall of the first eye window is provided with a first internal thread along the circumference. The end of the first mounting support body connected to the first eye window is circular and is provided with a first external thread that matches the first internal thread. The first mounting support body is threadedly connected to the first eye window. The first lens is mounted on the end of the first mounting support body away from the first eye window.

[0033] The inner wall of the second eye window is provided with a second internal thread along the circumference. The end of the second mounting support body connected to the second eye window is circular and is provided with a second external thread that matches the second internal thread. The second mounting support body is threadedly connected to the second eye window, and the second lens is mounted on the end of the second mounting support body away from the second eye window.

[0034] This application uses a threaded connection between the support carrier and the eye window, ensuring reliable and airtight installation. The threaded connection also allows adjustment of the distance between the lens and the mask body, enabling the mask to meet different user requirements. Furthermore, when the lens is scratched or damaged, it can be replaced individually, avoiding the need to replace the entire mask and reducing operating costs.

[0035] In some possible implementations, the end of the first mounting support away from the first eye window is a beveled surface; the end of the second mounting support away from the second eye window is a beveled surface.

[0036] This application uses a beveled surface to increase the field of view of the lens and avoid blind spots. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a face mask according to an embodiment of the present invention.

[0038] Figure 2 This is one of the structural schematic diagrams of the face mask in Embodiment 2 of this utility model.

[0039] Figure 3 This is a schematic diagram of the structure of the first mounting support and the second mounting support in the face mask of Embodiment 2 of this utility model.

[0040] Figure 4 This is the second schematic diagram of the structure of the face mask in Embodiment 2 of this utility model.

[0041] Figure 5 This is the third structural schematic diagram of the face mask in Embodiment 2 of this utility model.

[0042] Figure 6 This is one of the structural schematic diagrams of the three-sided mask of this utility model.

[0043] Figure 7 This is the second structural schematic diagram of the face shield in Embodiment 3 of this utility model.

[0044] The specific reference numerals in the attached drawings are explained as follows: 1. Mask body; 2. Eye window; 2-1 first eye window; 2-2 second eye window; 3. Lens; 3-1 first lens; 3-2 second lens; 4. Flexible vision correction patch; 5. Air outlet; 6. One-way air outlet valve; 7. Air inlet; 8. Housing; 9-1 first fastening part; 9-2 second fastening part; 10-1 first annular sealing strip; 10-2 second annular sealing strip; 11-1 first mounting support; 11-2 second mounting support; 12-1 first external thread; 12-2 second external thread; 13-1 first internal thread; 13-2 second external thread. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] It should be noted that in the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first," "second," and similar words used in the description of this utility model do not indicate any order, quantity, or importance, but are only used to distinguish different components, and therefore should not be construed as limiting this utility model.

[0047] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures. Example 1

[0049] Figure 1 This is a schematic diagram of the first embodiment of the face mask of this utility model.

[0050] exist Figure 1 The mask shown in the illustration has two eye windows; according to other embodiments, the mask may also have one eye window to cover the field of vision of both eyes. In specific embodiments, in addition to the features shown, the mask may also include other functional parts not shown, including but not limited to drawstrings, nose fitting grooves, etc., which will not be described in detail here.

[0051] The mask of this embodiment is used in non-aquatic environments and includes: mask body 1;

[0052] The mask body 1 has a lens 3 at the eye window 2, and a flexible vision correction patch 4 is detachably installed at the lens 3; the mask body 1 has an air inlet 7 on its side, and a filter unit is installed at the air inlet 7; the mask body 1 has an air outlet 5 below the eye window 2, and a one-way air outlet valve 6 is installed at the air outlet 5; the cross-sectional area of ​​the air outlet 5 is larger than the cross-sectional area of ​​the air inlet 7.

[0053] The flexible vision correction patch 4 is attached to the inner or outer surface of the lens 3. The flexible vision correction patch 4 is made of silicone material.

[0054] The lens 3 is provided with a receiving groove, the shape of which matches the shape of the flexible vision correction patch 4, and the flexible vision correction patch 4 is adhered to the receiving groove.

[0055] In this application, a flexible vision correction patch 4 is detachably installed at lens 3, allowing the user to select the appropriate flexible vision correction patch 4 based on their vision. The flexible vision correction patch 4 can be a silicone myopia lens or a silicone hyperopia lens, or other silicone lens patches with vision correction functions. By installing the flexible vision correction patch 4, myopic or hyperopic users do not need to wear glasses when using the mask, ensuring a tight seal when wearing the mask.

[0056] The silicone lens sticker can be bonded to the lens 3 using water. This application is suitable for non-aqueous environments. However, in certain high-temperature scenarios, the moisture that creates the adhesive between the silicone lens sticker and the lens 3 can evaporate, causing them to detach. This application addresses this by providing a corresponding receiving groove on the lens 3. The silicone lens sticker is placed within this groove, and its shape matches the shape of the groove. This prevents moisture from easily evaporating between the silicone lens sticker and the lens 3, and the receiving groove also limits the placement of the silicone lens sticker, resulting in a more secure installation between them.

[0057] In this embodiment, the cross-sectional area of ​​the air outlet 5 is larger than that of the air inlet 7, ensuring that the user can breathe more smoothly when wearing the mask.

[0058] The flexible vision correction patch 4 in this implementation is a myopia correction patch or a hyperopia correction patch.

[0059] The filter unit in this embodiment includes a housing 8, inside which a receiving cavity is formed. The receiving cavity communicates with the interior of the mask body 1, and a filter medium is disposed within the receiving cavity. By disposing of the filter medium within the receiving cavity, the outside air can be filtered, preventing the user from being harmed by toxic gases from the outside environment when using the mask.

[0060] In this embodiment, the filter medium is at least two of the following: activated carbon filter cotton, non-woven filter cotton, glass fiber filter cotton, and synthetic fiber filter cotton. The combination of multiple materials in the filter medium enhances the gas filtration effect and ensures the cleanliness of the gas inhaled through the mask.

[0061] In this embodiment, the housing 8 has a cylindrical structure. The air inlet end 7 has an external thread, and the housing 8 facing the air inlet end 7 has an internal thread. The housing 8 is detachably connected to the air inlet end 7 via the engagement of the internal and external threads. The threaded connection between the housing 8 and the air inlet end 7 facilitates filter replacement, improving the practicality and flexibility of the mask and thus enhancing the user experience. Example 2

[0062] Figures 2-5 This is a schematic diagram of the second embodiment of the face mask of this utility model.

[0063] The mask of this embodiment is used in non-aquatic environments. The mask includes: a mask body 1, a lens 3 provided at the eye window 2 of the mask body 1, the lens 3 being detachably connected to the eye window 2; an air inlet 7 provided on the side of the mask body 1, a filter unit provided at the air inlet 7; an air outlet 5 provided below the eye window 2 of the mask body 1, a one-way air outlet valve 6 provided at the air outlet 5; the cross-sectional area of ​​the air outlet 5 is larger than the cross-sectional area of ​​the air inlet 7.

[0064] The eye window 2 includes a first eye window 2-1 and a second eye window 2-2. The first eye window 2-1 and the second eye window 2-2 are symmetrically arranged along the center line of the mask body 1. The first lens 3-1 and the second lens 3-2 are detachably installed at the first eye window 2-1 and the second eye window 2-2, respectively. The first lens 3-1 and the second lens 3-2 are vision correction lenses 3.

[0065] In this embodiment, a first lens 3-1 and a second lens 3-2 are detachably mounted at the first eye window 2-1 and the second eye window 2-2, allowing the user to select the appropriate lens 3 based on their vision. The first lens 3-1 and the second lens 3-2 can be either a myopia lens 3 or a hyperopia lens 3, or other lenses 3 with vision correction functions. By providing detachable first lenses 3-1 and second lenses 3-2, myopic or hyperopic users do not need to wear additional glasses when using the mask, ensuring a tight seal when wearing the mask.

[0066] In this embodiment, the cross-sectional area of ​​the air outlet 5 is larger than that of the air inlet 7, ensuring that the user can breathe more smoothly when wearing the mask.

[0067] In this embodiment, a first mounting support 11-1 and a second mounting support 11-2 are also included. The first lens 3-1 is mounted on the first mounting support 11-1, and the second lens 3-2 is mounted on the second mounting support 11-2. The first mounting support 11-1 is detachably connected to the first eye window 2-1, and the second mounting support 11-2 is detachably connected to the second eye window 2-2.

[0068] The first mounting support 11-1 and the second mounting support 11-2 serve as mounting carriers for the first lens 3-1 and the second lens 3-2, respectively, enabling detachable installation between the first lens 3-1, the second lens 3-2 and the mask body 1, improving the ease of installation and facilitating quick donning of the mask by the user.

[0069] In this embodiment, the first eye window 2-1 and the second eye window 2-2 have the same structure, the first mounting support 11-1 and the second mounting support 11-2 have the same structure, the first lens 3-1 and the second lens 3-2 have the same structure, and the first mounting support 11-1 and the second mounting support 11-2 are annular support structures with openings at both ends.

[0070] The first lens 3-1 is fixedly installed at one end of the first mounting support 11-1. The first eye window 2-1 is provided with a first fastening part 9-1 along its circumference. The other end of the first mounting support 11-1 is fastened to the outer circumference of the first fastening part 9-1. A first annular sealing strip 10-1 is installed between the first mounting support 11-1 and the first fastening part 9-1. The first annular sealing strip 10-1 is compressed between the first mounting support 11-1 and the first fastening part 9-1.

[0071] The second lens 3-2 is fixedly installed at one end of the second mounting support 11-2. The second eye window 2-2 is provided with a second fastening part 9-2 along its circumference. The other end of the second mounting support 11-2 is fastened to the outer periphery of the second fastening part 9-2. A second annular sealing strip 10-2 is installed between the second mounting support 11-2 and the second fastening part 9-2. The second annular sealing strip 10-2 is compressed between the second mounting support 11-2 and the second fastening part 9-2.

[0072] The first annular sealing strip 10-1 and the second annular sealing strip are provided. The annular sealing strip enhances the reliability of the connection between the mounting support and the fastening part, and ensures the airtightness of the mask body 1, preventing external gas from seeping into the mask through the eye window 2.

[0073] The filter unit in this embodiment includes a housing 8, inside which a receiving cavity is formed. The receiving cavity communicates with the interior of the mask body 1, and a filter medium is disposed within the receiving cavity. By disposing of the filter medium within the receiving cavity, the outside air can be filtered, preventing the user from being harmed by toxic gases from the outside environment when using the mask.

[0074] In this embodiment, the filter medium is at least two of the following: activated carbon filter cotton, non-woven filter cotton, glass fiber filter cotton, and synthetic fiber filter cotton. The combination of multiple materials in the filter medium enhances the gas filtration effect and ensures the cleanliness of the gas inhaled through the mask.

[0075] In this embodiment, the housing 8 has a cylindrical structure. The air inlet end 7 has an external thread, and the housing 8 facing the air inlet end 7 has an internal thread. The housing 8 is detachably connected to the air inlet end 7 via the engagement of the internal and external threads. The threaded connection between the housing 8 and the air inlet end 7 facilitates filter replacement, improving the practicality and flexibility of the mask and thus enhancing the user experience. Example 3

[0076] Figures 6-7 This is a schematic diagram of the third embodiment of the face mask of this utility model.

[0077] The mask of this embodiment is used in non-aquatic environments. The mask includes: a mask body 1, a lens 3 provided at the eye window 2 of the mask body 1, the lens 3 being detachably connected to the eye window 2; an air inlet 7 provided on the side of the mask body 1, a filter unit provided at the air inlet 7; an air outlet 5 provided below the eye window 2 of the mask body 1, a one-way air outlet valve 6 provided at the air outlet 5; the cross-sectional area of ​​the air outlet 5 is larger than the cross-sectional area of ​​the air inlet 7.

[0078] The eye window 2 includes a first eye window 2-1 and a second eye window 2-2. The first eye window 2-1 and the second eye window 2-2 are symmetrically arranged along the center line of the mask body 1. The first lens 3-1 and the second lens 3-2 are detachably installed at the first eye window 2-1 and the second eye window 2-2, respectively. The first lens 3-1 and the second lens 3-2 are vision correction lenses 3.

[0079] In this embodiment, a first lens 3-1 and a second lens 3-2 are detachably mounted at the first eye window 2-1 and the second eye window 2-2, allowing the user to select the appropriate lens 3 based on their vision. The first lens 3-1 and the second lens 3-2 can be either a myopia lens 3 or a hyperopia lens 3, or other lenses 3 with vision correction functions. By providing detachable first lenses 3-1 and second lenses 3-2, myopic or hyperopic users do not need to wear additional glasses when using the mask, ensuring a tight seal when wearing the mask.

[0080] In this embodiment, the cross-sectional area of ​​the air outlet 5 is larger than that of the air inlet 7, ensuring that the user can breathe more smoothly when wearing the mask.

[0081] In this embodiment, a first mounting support 11-1 and a second mounting support 11-2 are also included. The first lens 3-1 is mounted on the first mounting support 11-1, and the second lens 3-2 is mounted on the second mounting support 11-2. The first mounting support 11-1 is detachably connected to the first eye window 2-1, and the second mounting support 11-2 is detachably connected to the second eye window 2-2.

[0082] The first mounting support 11-1 and the second mounting support 11-2 serve as mounting carriers for the first lens 3-1 and the second lens 3-2, respectively, enabling detachable installation between the first lens 3-1, the second lens 3-2 and the mask body 1, improving the ease of installation and facilitating quick donning of the mask by the user.

[0083] In this embodiment, the cross-sections of the first eye window 2-1 and the second eye window 2-2 are both circular;

[0084] The inner sidewall of the first eye window 2-1 is provided with a first internal thread 13-1 along the circumference. The end of the first mounting support 11-1 connected to the first eye window 2-1 is round and is provided with a first external thread 12-1 that matches the first internal thread 13-1. The first mounting support 11-1 is threadedly connected to the first eye window 2-1. The first lens 3-1 is installed at the end of the first mounting support 11-1 away from the first eye window 2-1.

[0085] The inner wall of the second eye window 2-2 is provided with a second internal thread 13-2 along the circumference. The end of the second mounting support 11-2 connected to the second eye window 2-2 is round and is provided with a second external thread 12-2 that matches the second internal thread 13-2. The second mounting support 11-2 is threadedly connected to the second eye window 2-2. The second lens 3-2 is installed at the end of the second mounting support 11-2 away from the second eye window 2-2.

[0086] This application uses a threaded connection between the support carrier and the eye window 2, ensuring reliable and airtight installation. The threaded connection also allows adjustment of the distance between the lens 3 and the mask body 1, enabling the mask to meet different user requirements. Furthermore, when the lens 3 is scratched or damaged, it can be replaced individually, avoiding the need to replace the entire mask and reducing operating costs.

[0087] In this embodiment, the end of the first mounting support 11-1 away from the first eye window 2-1 is a beveled surface; the end of the second mounting support 11-2 away from the second eye window 2-2 is a beveled surface.

[0088] This application uses a beveled surface to increase the field of view of lens 3 and avoid blind spots.

[0089] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable visor for a lens for use in a non-aqueous environment, characterized in that, The face shield comprises: a face shield body; a lens is arranged at the eye window of the face shield body, and a flexible vision correction patch is detachably arranged at the lens; an air inlet end is arranged at the side edge of the face shield body, and a filter unit is arranged at the air inlet end; an air outlet end is arranged below the eye window of the face shield body, and a one-way air outlet valve is arranged at the air outlet end; the cross-sectional area of the air outlet end is greater than that of the air inlet end; the flexible vision correction patch is attached to the inner surface or the outer surface of the lens, a receiving groove is arranged on the lens, the shape of the receiving groove matches that of the flexible vision correction patch, and the flexible vision correction patch is attached to the receiving groove.

2. The lens-adjustable face shield according to claim 1, wherein, The flexible vision correction patch is a myopia correction patch or a hyperopia correction patch, and the flexible vision correction patch is made of silicone material.

3. The lens-adjustable face shield of claim 1, wherein, The filter unit comprises a shell, a receiving cavity is formed in the shell, the receiving cavity is in communication with the inside of the face shield body, and a filter medium is arranged in the receiving cavity.

4. The lens-adjustable face shield of claim 3, wherein, The filter medium is at least two of activated carbon filter cotton, non-woven filter cotton, glass fiber filter cotton, and synthetic fiber filter cotton.

5. The lens-adjustable face shield of claim 3, wherein, The shell is in a cylindrical structure, an external thread is arranged at the air inlet end, an internal thread is arranged on the shell towards the air inlet end, and the shell is detachably connected with the air inlet end through the cooperation of the internal thread and the external thread.

6. An adjustable visor for a lens for use in a non-aqueous environment, characterized by, The face shield comprises: a face shield body, a lens is arranged at the eye window of the face shield body, and the lens is detachably connected with the eye window; an air inlet end is arranged at the side edge of the face shield body, and a filter unit is arranged at the air inlet end; an air outlet end is arranged below the eye window of the face shield body, and a one-way air outlet valve is arranged at the air outlet end; the cross-sectional area of the air outlet end is greater than that of the air inlet end; 7. The lens-adjustable face shield according to claim 6, wherein, The eye window comprises a first eye window and a second eye window, the first eye window and the second eye window are symmetrically arranged along the center line of the face shield body, and a first lens and a second lens are detachably arranged at the first eye window and the second eye window respectively, the first lens and the second lens are vision correction lenses.

8. The lens-adjustable face shield according to claim 7, wherein, Further comprising a first mounting support and a second mounting support, the first lens is mounted on the first mounting support, the second lens is mounted on the second mounting support, the first mounting support is detachably connected with the first eye window, and the second mounting support is detachably connected with the second eye window. The first eye window and the second eye window are of the same structure, the first mounting support and the second mounting support are of the same structure, the first lens and the second lens are of the same structure, and the first mounting support and the second mounting support are annular support structures with both ends open. The first lens is fixedly installed at one end of the first installation support, the first eye window is provided with a first buckling part along the circumference thereof, the other end of the first installation support is bucklingly installed at the outer circumference of the first buckling part, a first annular sealing rubber strip is installed between the first installation support and the first buckling part, and the first annular sealing rubber strip is compressed between the first installation support and the first buckling part. The second lens is fixedly installed at one end of the second installation support, the second eye window is provided with a second buckling part along the circumference thereof, the other end of the second installation support is bucklingly installed at the outer circumference of the second buckling part, a second annular sealing rubber strip is installed between the second installation support and the second buckling part, and the second annular sealing rubber strip is compressed between the second installation support and the second buckling part.

9. The lens-adjustable face shield according to claim 7, wherein, The first eye window and the second eye window are both circular in cross section. The inner side wall of the first eye window is provided with a first inner thread along the circumference, the end of the first installation support connected with the first eye window is circular and externally provided with a first outer thread matched with the first inner thread, the first installation support is threadedly connected with the first eye window, and the first lens is installed at the end of the first installation support away from the first eye window. The inner side wall of the second eye window is provided with a second inner thread along the circumference, the end of the second installation support connected with the second eye window is circular and externally provided with a second outer thread matched with the second inner thread, the second installation support is threadedly connected with the second eye window, and the second lens is installed at the end of the second installation support away from the second eye window.

10. The adjustable mask according to claim 9, wherein the end of the first installation support away from the first eye window is chamfered, and the end of the second installation support away from the second eye window is chamfered.

Images