An exhalation valve assembly for a protective face mask

Abstract

This utility model discloses an exhalation valve assembly for a protective face mask, including an exhalation valve base connected to the face mask. The exhalation valve base contains, from the inside out, a secondary valve plate, an exhalation valve protective seat, a primary valve plate, and an exhalation valve cover. The exhalation valve base has a cavity, and the inner wall of the cavity is formed with an exhalation valve cover mounting step and an exhalation valve protective seat mounting step. The exhalation valve protective seat is fastened onto the exhalation valve protective seat mounting step. The primary valve plate is mounted on the exhalation valve protective seat. The exhalation valve cover is positioned on the exhalation valve cover mounting step and presses against the top surface of the exhalation valve protective seat. A locking component is formed on the side wall of the exhalation valve cover mounting step. This utility model achieves double barrier by setting a primary valve plate and a secondary valve plate inside the exhalation valve base, blocking particulate matter in the air, preventing toxic substances from entering the face mask, reducing the corrosion of internal components by toxic gases, and extending the service life of the internal components of the face mask.

Description

Technical Field

[0001] This utility model relates to the field of medical protective face mask technology, specifically to an exhalation valve assembly for a protective face mask. Background Technology

[0002] When people work in dusty or toxic polluted environments, they are highly susceptible to respiratory diseases such as pneumoconiosis and silicosis if they are exposed to such environments for a long time without any protective measures. In severe cases, it can even be life-threatening. Although masks can provide some protection, their isolation is far less than that of gas masks.

[0003] However, existing silicone face shields generally only have one exhalation valve at the breathing area. With prolonged use, the exhalation valve components may react with toxic and harmful substances, causing the components to warp or peel up, affecting the sealing performance. Therefore, in order to improve the service life of the face shield components and ensure the sealing performance of the face shield, the exhalation valve assembly of this protective face shield was designed. Utility Model Content

[0004] The purpose of this utility model is to provide an exhalation valve assembly for a protective face mask. By setting a primary valve plate and a secondary valve plate in the exhalation valve base, a double barrier is achieved to block particulate matter in the air, prevent toxic and harmful substances from entering the inside of the face mask, reduce the corrosion of internal components by toxic and harmful gases, and extend the service life of the face mask.

[0005] This utility model provides the following technical solution: an exhalation valve assembly for a protective face mask, comprising an exhalation valve base connected to the face mask, characterized in that: a secondary valve plate, an exhalation valve protective seat, a primary valve plate, and an exhalation valve cover are sequentially arranged from the inside to the outside of the exhalation valve base; a cavity is formed inside the exhalation valve base; an exhalation valve cover mounting step and an exhalation valve protective seat mounting step are formed on the inner wall of the cavity; the exhalation valve protective seat is fastened to the exhalation valve protective seat mounting step; the primary valve plate is installed on the exhalation valve protective seat; the exhalation valve cover is disposed on the exhalation valve cover mounting step and presses against the top surface of the exhalation valve protective seat; a locking component is formed on the side wall of the exhalation valve cover mounting step, and the locking component presses the exhalation valve cover tightly onto the exhalation valve cover mounting step.

[0006] In order to lock the exhalation valve cover and prevent it from moving, the locking component is a baffle formed on the installation step of the exhalation valve cover. The cross-section of the baffle is L-shaped. A retaining plate is formed on the outer edge of the exhalation valve cover. The retaining plate is embedded in the baffle to limit the position of the exhalation valve cover.

[0007] In order to install the primary valve plate inside the exhalation valve protection seat, the exhalation valve protection seat is a rotating body of an L-shaped plate. The bottom of the exhalation valve protection seat is formed with multiple radially distributed reinforcing ribs. The center of the exhalation valve protection seat is provided with an installation hole. The center of the primary valve plate is formed with an inlet pin. The insertion of the inlet pin into the installation hole connects the primary valve plate to the exhalation valve protection seat.

[0008] To enhance the connection strength between the inlet needle and the primary valve plate, the inlet needle comprises a cylinder, a cone, and a blind hole in sequence. The inclination direction of the cone is the same as the insertion direction of the inlet needle, and the primary valve plate is formed on the outer wall of the blind hole.

[0009] To facilitate the disassembly and replacement of the secondary valve plate, a positioning pin is formed on the bottom surface of the exhalation valve base, and a limiting groove is formed on the secondary valve plate, with the limiting groove fitted onto the positioning pin.

[0010] To enhance the connection strength between the secondary valve plate and the positioning pin, the limiting groove includes a conical groove and a circular groove, and the upper end of the positioning pin is formed with a circular ring, which cooperates with the circular groove to limit the movement of the secondary valve plate.

[0011] In order to fix the exhalation valve base, an upper groove and a lower groove are provided on the outer surface of the exhalation valve base. The upper groove is located on the side of the exhalation valve cover mounting step, and the lower groove is provided on the outer surface of the bottom of the exhalation valve base.

[0012] In order to position the exhalation valve cover in a rotating manner, a first step is formed on the upper end of the exhalation valve base, a rotating positioning plate is formed on the inner wall of the first step, and a positioning platform is formed on the surface of the exhalation valve cover. When the positioning platform and the rotating positioning plate are in the same straight line, the exhalation valve cover is locked.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0014] (1) By setting a primary valve plate and a secondary valve plate in the exhalation valve base, double barrier is achieved to block particulate matter in the air, prevent toxic and harmful substances from entering the mask, reduce the corrosion of the mask's internal components by toxic and harmful gases, and extend the service life of the mask's internal components.

[0015] (2) By rotating the exhalation valve cover, the exhalation valve cover is pressed onto the exhalation valve protection seat to prevent the valve plate from moving up and down and affecting the sealing performance. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0018] Figure 2 This is an exploded view of the overall structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the exhalation valve base of this utility model;

[0020] Figure 4 This is a perspective view of the exhalation valve base of this utility model;

[0021] Figure 5 This is a cross-sectional view of the secondary valve plate of this utility model;

[0022] Figure 6 This is a perspective view of the secondary valve plate of this utility model;

[0023] Figure 7 This is a cross-sectional view of the exhalation valve protection seat of this utility model;

[0024] Figure 8 This is a perspective view of the exhalation valve protection seat of this utility model;

[0025] Figure 9 This is a cross-sectional view of the primary valve plate of this utility model;

[0026] Figure 10 This is a perspective view of the primary valve plate of this utility model;

[0027] Figure 11 This is a perspective view of the exhalation valve cover of this utility model;

[0028] In the diagram: 1. Exhalation valve base; 11. Baffle; 12. Positioning pin; 13. Upper groove; 14. Lower groove; 15. Rotating positioning plate; 16. First step; 17. Exhalation valve cover mounting step; 18. Exhalation valve protection seat mounting step; 2. Secondary valve plate; 21. Limiting groove; 22. Step surface; 3. Exhalation valve protection seat; 31. Reinforcing rib; 32. Mounting hole; 4. Primary valve plate; 41. Inlet needle; 43. Blind hole; 44. Cone; 5. Exhalation valve cover; 51. Clamping plate; 52. Positioning platform. Detailed Implementation

[0029] 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.

[0030] Please see Figures 1 to 4 This utility model provides a technical solution: an exhalation valve assembly for a protective face mask, including an exhalation valve base 1 connected to the face mask. The exhalation valve base 1 contains, from the inside out, a secondary valve plate 2, an exhalation valve protection seat 3, a primary valve plate 4, and an exhalation valve cover 5. The secondary valve plate 2 and the primary valve plate 4 simultaneously block airflow, preventing airborne particles from entering the face mask. Furthermore, the secondary valve plate 2 and the primary valve plate 4 are detachable components, facilitating replacement and reducing the corrosion of the face mask components by toxic gases, thus extending the face mask's service life. The exhalation valve base 1 has a cavity, and the inner wall of the cavity is formed with an exhalation valve cover mounting step 17 and an exhalation valve protection seat mounting step 18. The exhalation valve protection seat 3 is mounted on the exhalation valve protection seat mounting step 18, and the primary valve plate 4 is mounted on the exhalation valve protection seat 3. The exhalation valve cover 5 is mounted on the exhalation valve cover mounting step 17 and presses against the top surface of the exhalation valve protection seat 3. A locking component is formed on the side wall of the exhalation valve cover mounting step 17. The locking component presses the exhalation valve cover 5 onto the exhalation valve cover mounting step 17. When the exhalation valve cover 5 is locked onto the exhalation valve cover mounting step 17 by the locking component, the exhalation valve cover 5 is also pressed against the top surface of the exhalation valve protection seat 3, ensuring the installation position of the exhalation valve protection seat 3. The lower end face of the exhalation valve cover 5 is located at the junction of the exhalation valve cover mounting step 17 and the exhalation valve protection seat 3, and the top surface of the exhalation valve protection seat 3 is flush with the exhalation valve cover mounting step 17. By limiting the exhalation valve protection seat 3 with the exhalation valve cover 5, the installation stability of the exhalation valve protection seat 3 is ensured, as well as the sealing between the exhalation valve protection seat 3 and the exhalation valve base 1 is guaranteed.

[0031] The locking component is a baffle 11 formed on the step 17 for mounting the exhalation valve cover. The cross-section of the baffle 11 is L-shaped. A retaining plate 51 is formed on the outer edge of the exhalation valve cover 5. The retaining plate 51 is rotated and embedded in the baffle 11 to limit the position of the exhalation valve cover 5, thereby locking the exhalation valve cover 5 onto the exhalation valve base 1 and preventing the exhalation valve cover 5 from moving up and down.

[0032] like Figures 7 to 10 As shown, the exhalation valve protection seat 3 is a rotating body of an L-shaped plate. The bottom of the exhalation valve protection seat 3 is formed with multiple reinforcing ribs 31, which are distributed radially. The gaps between the reinforcing ribs 31 are used to introduce air. The center of the exhalation valve protection seat 3 is provided with a mounting hole 32. The center of the primary valve plate 4 is formed with an inlet needle 41. The insertion of the inlet needle 41 into the mounting hole 32 connects the primary valve plate 4 to the exhalation valve protection seat 3. The primary valve plate 4 is fixed in the center of the exhalation valve protection seat 3 through the cooperation of the inlet needle 41 and the mounting hole 32. At the same time, the primary valve plate 4 blocks the bottom of the exhalation valve protection seat 3 to prevent particulate matter in the air from entering.

[0033] The inlet needle 41 includes a cylinder, a cone 44 and a blind hole 43 in sequence. The inclination direction of the cone 44 is the same as the insertion direction of the inlet needle 41. The primary valve plate 4 is formed on the outer wall of the blind hole 43. When installed, the cone 44 is embedded in the lower end of the mounting hole 32, which improves the connection strength between the exhalation valve protection seat 3 and the primary valve plate 4 and prevents the primary valve plate 4 from falling off the exhalation valve protection seat 3 under shaking.

[0034] like Figure 3 As shown, a positioning pin 12 is formed on the bottom surface of the exhalation valve base 1, and a limiting groove 21 is formed on the secondary valve plate 2. Concentrically distributed stepped surfaces 22 are formed on the surface of the secondary valve plate 2. The limiting groove 21 is fitted onto the positioning pin 12, and the secondary valve plate 2 is fitted onto the positioning pin 12, which improves the installation efficiency of the secondary valve plate 2 and makes it convenient to disassemble and replace the secondary valve plate 2.

[0035] like Figure 5 and 6 As shown, the limiting groove 21 includes a conical groove and a circular groove. The upper end of the positioning pin 12 is formed with a circular ring. The circular ring and the circular groove cooperate to limit the secondary valve plate 2, which enhances the connection strength between the positioning pin 12 and the secondary valve plate 2 and prevents the secondary valve plate 2 from falling off under shaking.

[0036] An upper groove 13 and a lower groove 14 are provided on the outer surface of the exhalation valve base 1. The upper groove 13 is located on the side of the first step 16, and the lower groove 14 is provided on the outer surface of the bottom of the exhalation valve base 1. The upper groove 13 and the lower groove 14 are used to connect the exhalation valve base 1 to the mask.

[0037] like Figure 2 As shown, the upper end of the exhalation valve base 1 is formed with a first step 16, and a rotating positioning plate 15 is formed on the inner wall of the first step 16. A positioning platform 52 is formed on the surface of the exhalation valve cover 5. When the positioning platform 52 and the rotating positioning plate 15 are on the same straight line, the exhalation valve cover 5 is locked. The positioning platform 52 ensures that the exhalation valve cover 5 rotates into place, preventing the problem of poor air tightness of the exhalation valve assembly due to the exhalation valve cover 5 not rotating into place.

[0038] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An exhalation valve assembly for a protective face mask, comprising an exhalation valve base connected to the face mask, characterized in that: The exhalation valve base is provided with a secondary valve plate, an exhalation valve protection seat, a primary valve plate, and an exhalation valve cover arranged sequentially from the inside to the outside. The exhalation valve base has a cavity, and the inner wall of the cavity is formed with an exhalation valve cover mounting step and an exhalation valve protection seat mounting step. The exhalation valve protection seat is fastened to the exhalation valve protection seat mounting step. The primary valve plate is installed on the exhalation valve protection seat. The exhalation valve cover is placed on the exhalation valve cover mounting step and presses against the top surface of the exhalation valve protection seat. A locking component is formed on the side wall of the exhalation valve cover mounting step, and the locking component presses the exhalation valve cover tightly onto the exhalation valve cover mounting step.

2. The exhalation valve assembly of a protective face mask according to claim 1, characterized in that: The locking component is a baffle formed on the mounting step of the exhalation valve cover. The cross-section of the baffle is L-shaped. A retaining plate is formed on the outer edge of the exhalation valve cover. The retaining plate is embedded in the baffle to limit the position of the exhalation valve cover.

3. The exhalation valve assembly of a protective face mask according to claim 1, characterized in that: The exhalation valve protection seat is a rotating body of an L-shaped plate. The center of the exhalation valve protection seat has an installation hole. The center of the primary valve plate has an inlet pin. The inlet pin is inserted into the installation hole to connect the primary valve plate to the exhalation valve protection seat.

4. The exhalation valve assembly of a protective face mask according to claim 3, characterized in that: The inlet needle comprises a cylinder, a cone, and a blind hole in sequence. The inclination direction of the cone is the same as the insertion direction of the inlet needle. The primary valve plate is formed on the outer wall of the blind hole.

5. The exhalation valve assembly of a protective face mask according to claim 1, characterized in that: A positioning pin is formed on the bottom surface of the exhalation valve base, and a limiting groove is formed on the secondary valve plate, with the limiting groove fitted onto the positioning pin.

6. The exhalation valve assembly of a protective face mask according to claim 5, characterized in that: The limiting groove includes a conical groove and a circular groove. The upper end of the positioning pin is formed with a circular ring, which cooperates with the circular groove to limit the secondary valve plate.

7. The exhalation valve assembly of a protective face mask according to claim 1, characterized in that: The outer surface of the exhalation valve base is provided with an upper groove and a lower groove. The upper groove is located on the side of the exhalation valve cover mounting step, and the lower groove is provided on the outer surface of the bottom of the exhalation valve base.

8. The exhalation valve assembly of a protective face mask according to claim 1, characterized in that: The upper end of the exhalation valve base is formed with a first step, and a rotating positioning plate is formed on the inner wall of the first step. A positioning platform is formed on the surface of the exhalation valve cover. When the positioning platform and the rotating positioning plate are in the same straight line, the exhalation valve cover is locked.

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