Respiratory protection mask provided with sealing self-checking device

Abstract

The utility model relates to a respiratory protection mask provided with a sealing self-checking device, and belongs to the technical field of respiratory protection sealing detection of protection masks. The sealing self-checking device is composed of a mask body, an elastic key, an inspiration valve seat channel, an inspiration valve, a filtering element connector, an air channel and a locking ring, the elastic key made of silica gel or rubber materials is adopted to press and block an air inlet channel, and due to the fact that the elastic key is soft, the plane contact sealing effect of the elastic key and the inspiration valve seat channel is good after the elastic key is pressed; after pressing, the fingers are released to restore the original shape, and the operation is convenient; the device can be suitable for breathing protection masks such as full face masks, half masks, single-filtering-element connectors and double-filtering-element connectors. The defects that in the prior art, detection illusion is easily caused by a self-detection method of blocking an air inlet by hands, and an airtight detection cover plate needs to be closed by driving a hinge to rotate through a pull rod in a manner of adopting the airtight detection cover plate, operation is inconvenient, a user feels oppressed when closing the airtight detection cover plate, and the airtight detection cover plate needs to be pressed down again to return are overcome.

Description

Technical Field

[0001] This utility model relates to a respiratory protective mask equipped with a sealing self-testing device, belonging to the field of respiratory protection sealing test technology for protective masks. Background Technology

[0002] When people work in special environments such as dusty environments or those with biochemical pollution, they need to wear respiratory protective masks to ensure that they can breathe normally and avoid the health hazards caused by inhaling polluted air.

[0003] An effective respirator must meet two basic conditions: first, it must be able to filter out harmful substances from the air while allowing air to pass through; second, it must fit snugly against the user's face, preventing harmful substances from bypassing the filter and entering the user's respiratory system. Currently, the technology for face mask fit is very mature. The face-contact area of ​​the mask is designed and manufactured using the head mold data of adult standard sizes (large, medium, and small). As long as it is designed and manufactured according to this standard data, meets and obtains the corresponding national standard certification, there are no problems with the fit of the respirator. However, in actual use, due to improper wearing by the user, or damage to the respirator due to other factors, resulting in malfunction without the wearer's notice, unnecessary accidents can occur. Therefore, users need to perform a self-check of the respirator and mask fit before entering a hazardous environment. Most current self-testing methods involve blocking the air intake with your hand, then inhaling to check for any obvious dents in the mask to determine if it is intact or fits properly. This method, which involves blocking the air intake with your hand, makes it difficult to completely seal the air intake during operation, and the subjective nature of the operation can easily lead to false results.

[0004] To overcome the shortcomings of self-testing by manually blocking the air inlet, the applicant designed a "protective mask with a testing device" that uses an airtightness testing cover for leak detection, application publication number CN 108201665 A; the airtightness testing cover is tested by pulling up a lever and using a hinge structure to cover the intake valve plate, preventing the intake valve plate from opening and thus achieving the testing purpose. However, this testing method often has flaws in practical applications. The reason is that the inhalation valve is generally a thin circular piece of 0.3-0.5mm, and the material is mostly silicone or rubber. This material itself has a certain degree of stickiness. In addition, the heat generated during long-term use in the mask cavity makes it easier for the inhalation valve to stick to the airtightness test cover. When the airtightness test cover is opened, it will also move the valve, causing the inhalation valve to fail to close when it should. In some cases, because the valve is stuck to the airtightness test cover, the valve will deform and wrinkle when the cover is closed again. When the cover is closed again, the valve cannot be completely sealed due to the wrinkles, which makes it impossible to complete the airtightness test. Moreover, this airtightness test device is only applicable to half masks with a single filter element interface. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the existing technology, such as the tendency to create false detections by blocking the air inlet with a hand, and the inadequacy of using an airtightness test cover for sealing tests. This invention provides a sealing self-test device that uses a spring-loaded button to block the air inlet channel. This self-test device is easy to operate; it is suitable for both half-face and full-face respirators, as well as single-filter and dual-filter interfaces.

[0006] This utility model achieves the above objectives through the following technical solution:

[0007] A respirator equipped with a self-sealing self-testing device comprises a mask body, a resilient button, an inhalation valve seat channel, an inhalation valve, a filter element interface, an airway, and a locking ring. Its features include: a T-shaped buckle groove on the mask body; a T-shaped buckle at the rear end of the airway; the rear end of the airway being pressed into the T-shaped buckle groove of the mask body by the T-shaped buckle; a circular hole in the middle of the front end of the airway being engaged with a convex ring on the frame of the mask body, thus fixing the front end of the airway to the mask body; the inhalation valve seat channel passing through the circular hole in the middle of the airway and inserted into the middle hole of the mask body, and being fixed to the mask body by the locking ring; the inhalation valve being installed in a valve seat hole at the rear end of the inhalation valve seat channel; and a resilient button installed in the front end of the inhalation valve seat channel, with the button on the resilient button extending outside the front end of the inhalation valve seat channel.

[0008] The airway and the mask body are assembled using T-shaped buckles and T-shaped buckle grooves to form a hollow cavity structure.

[0009] The front end of the elastic button is equipped with a self-testing device cover, which is pressed and fixed onto the frame protrusion ring of the mask body.

[0010] The filter element interface has a circular snap-fit. One end of the filter element interface with the circular snap-fit ​​is fixed to the circular hole of the airway, and the other end of the filter element interface is pressed onto the frame of the mask body. The airway and the frame of the mask body are connected through the filter element interface.

[0011] The connection between the filter element interface and the air passage is equipped with a filter element interface sealing ring.

[0012] The mask body and the mask body frame are connected by an exhalation valve seat, and the exhalation valve is installed in the valve seat hole of the exhalation valve seat.

[0013] The connection between the exhalation valve seat and the dual-interface frame of the half-mask is equipped with an exhalation valve seat sealing ring.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] 1. Reliable sealing.

[0016] The intake passage is blocked by pressing a spring-loaded button. Because the spring-loaded button is made of silicone or rubber, which is relatively soft, it will make contact with the intake valve seat surface after being pressed to achieve a sealing effect. This is more reasonable and reliable than the traditional method of blocking by hand.

[0017] 2. Good stability.

[0018] Compared to the method of using an airtight test cover to close and press down the intake valve plate, this method is more stable and safer, and has higher testing reliability.

[0019] Easy to operate.

[0020] The respirator equipped with a self-sealing test device uses a spring-loaded button; simply press and release to return it to its original position, making it easy to operate. In contrast, existing airtightness testing covers use a lever to rotate a hinge to close, which is inconvenient. Pulling the lever up to close the cover causes a feeling of stuffiness, and it also requires pressing down again to return it to its original position.

[0021] 4. Wide range of applications.

[0022] This respirator equipped with a self-sealing test device has a wide range of applications and can be used with all types of respirators, such as full-face and half-face masks; it can be used with both single-filter and dual-filter interfaces. Although there is currently no standardized interface for respirator filter elements, commonly used interfaces such as triangular, rotary, and threaded interfaces can be used by simply replacing the filter element interface with one compatible with this respirator equipped with the self-sealing test device to meet the self-testing requirements. Other methods using airtightness testing covers can only be used on masks with single-filter interfaces. Attached Figure Description

[0023] Figure 1 A front view schematic diagram of a respirator equipped with a self-testing sealing device.

[0024] Figure 2 for Figure 1 A schematic diagram of the AA cross-sectional structure;

[0025] Figure 3 A schematic diagram of the self-testing device in the pressed-closed state;

[0026] Figure 4 An exploded view of the self-testing device;

[0027] Figure 5 A schematic diagram of the front view of the self-testing device mounted on a dual-interface half-mask;

[0028] Figure 6 for Figure 5 Schematic diagram of the BB cross-section structure;

[0029] Figure 7 A schematic diagram of the self-testing device for sealing being installed on a dual-interface half-face in a pressed-closed state;

[0030] Figure 8 Exploded view of the self-testing device installed on the dual-interface half-face;

[0031] Figure 9 A schematic diagram of the front view of the self-testing device mounted on a single-interface half-mask;

[0032] Figure 10 for Figure 9 CC cross-sectional view of the structure;

[0033] Figure 11 A schematic diagram of the self-testing device for sealing being installed on a single-interface half-mask in a pressed-closed state;

[0034] Figure 12 Exploded view of a self-testing device installed on a single-interface half-face;

[0035] Figure 13 A schematic diagram of a self-testing device installed on a dual-interface full-face fixture;

[0036] Figure 14 Exploded view of the self-testing device installed on a dual-interface full-face fixture;

[0037] Figure 15 A schematic diagram of a self-testing device installed on a single-interface full-face fixture;

[0038] Figure 16 Exploded view of a self-testing device installed on a single-interface full-face fixture;

[0039] Figure 17 This is a schematic diagram of the structure of a dual-interface half-mask for respiratory protection in the prior art.

[0040] Figure 18 for Figure 17 Schematic diagram of the DD cross-sectional structure.

[0041] In the diagram: 1. Mask body, 101. T-shaped buckle groove, 2. Elastic button, 201. Button, 3. Inhalation valve seat channel, 4. Inhalation valve, 5. Filter element interface, 501. Circular bayonet, 6. Airway, 601. T-shaped buckle, 7. Locking ring, 8. Self-test device cover, 9. Exhalation valve seat, 10. Exhalation valve, 11. Exhalation valve cover, 12. Filter element interface sealing ring, 13. Exhalation valve seat sealing ring, 14. Half-mask double-interface frame, 15. Single-interface mask body frame, 16. Full-face mask body frame. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-16 The present invention will be further described below. In the following description, the front end and the rear end refer to the end of the protective mask and components that is away from the face, and the rear end refers to the end of the protective mask and components that is close to the face.

[0043] The respirator equipped with a self-sealing self-test device consists of a mask body 1, a flexible button 2, an inhalation valve seat channel 3, an inhalation valve 4, a filter element interface 5, an airway 6, and a locking ring 7. The self-sealing self-test device is composed of the flexible button 2, the inhalation valve seat channel 3, the inhalation valve 4, the filter element interface 5, the airway 6, and the locking ring 7. A T-shaped buckle groove 101 is formed on the mask body 1, and a T-shaped buckle 601 is formed at the rear end of the airway 6. The rear end of the airway 6 is fastened into the T-shaped buckle groove 101 of the mask body 1 by the T-shaped buckle 601. The annular hole in the middle of the front end of the airway 6 is fitted onto the convex ring of the mask body 1's frame, fixing the front end of the airway 6 to the mask body 1. After the airway 6 and the mask body 1 are assembled through the T-shaped buckle 601 and the T-shaped buckle groove 101, a hollow cavity structure is formed.

[0044] Furthermore, the inhalation valve seat channel 3 passes through the annular hole in the middle of the air passage 6 and is inserted into the middle hole of the mask body 1. The inhalation valve seat channel 3 is fixed to the mask body 1 by the locking ring 7. The inhalation valve 4 is installed in the valve seat hole at the rear end of the inhalation valve seat channel 3. The elastic button 2 is installed in the front end of the inhalation valve seat channel 3, and the button 201 on the elastic button 2 extends out of the front end of the inhalation valve seat channel 3 for easy pressing by the user. When the elastic button 2 is installed on a single-port half-mask or a double-port half-mask, a self-test device cover 8 is installed on the front end of the elastic button 2, and the self-test device cover 8 is pressed and fixed on the frame protrusion ring of the mask body 1.

[0045] Furthermore, the filter element interface 5 is provided with a circular retainer 501. One end of the filter element interface 5 with the circular retainer 501 is fixed to the circular hole of the air duct 6, and the other end of the filter element interface 5 is pressed against the frame of the mask body 1. The air duct 6 and the frame of the mask body 1 are connected through the filter element interface 5. A filter element interface sealing ring 12 is installed at the connection between the filter element interface 5 and the air duct 6 to prevent air leakage at the connection between the filter element interface 5 and the air duct 6.

[0046] Furthermore, the mask body 1 and its frame are connected via an exhalation valve seat 9, and the exhalation valve 10 is installed in the valve seat hole of the exhalation valve seat 9. An exhalation valve seat sealing ring 13 is installed at the connection between the exhalation valve seat 9 and the half-mask dual-interface frame 14.

[0047] The working principle of this respirator equipped with a self-sealing test device is as follows: Taking a dual-port respirator as an example, when inhaling, the gas in a commercially available dual-port respirator is filtered through the filter elements on both sides and then directly enters the mask body through the filter element interface 5. (See Appendix) Figure 17-18 The gas in this invention is filtered by filter elements on both sides, then enters the hollow cavity formed by the air passage 6 and the mask body 1 through the filter element interfaces 5 on both sides of the air passage. It then enters the mask body 1 through the intake valve seat channel 3 and intake valve 4 in the middle of the mask. Additionally, a spring-loaded button 2 is installed at the front end of the intake valve seat channel 3. When the user needs to perform an airtightness test while wearing the mask, pressing the button 201 of the spring-loaded button 2 will block the intake valve seat channel 3, preventing gas from entering (see appendix). Figure 7 If the wearer cannot inhale and feels suffocated, it indicates that there is no leakage in the respirator. After the test is completed, release button 201, and the elastic button 2 will return to its original state under the action of elasticity, and the inhalation channel will be unobstructed again.

[0048] In commercially available single-port respirators, the inhaled gas is filtered through a single filter element before directly entering the mask body through the filter element interface 5. However, in this invention, the gas is filtered through a single filter element, then first enters the hollow cavity formed by the airway 6 and the mask body 1, and then enters the mask body 1 through the upper inhalation valve seat channel 3 and inhalation valve 4. Its usage is the same as the aforementioned dual-filter interface type.

[0049] Since respiratory protective masks are divided into half-masks and full-face masks, half-masks refer to a tight-fitting mask that can cover the mouth, nose and chin, while full-face masks refer to a tight-fitting mask that can cover the eyes, mouth, nose and chin, the position of the self-test device on the respiratory protective mask is slightly different, which will be described below.

[0050] The application of this invention in a dual-port filter element of a respiratory protective half-mask (see appendix) Figure 5-8 When this invention is applied to a half-mask with dual interfaces, the sealing self-testing device is installed on the half-mask dual-interface frame 14, and is fixed to the half-mask dual-interface frame 14 by the self-testing device cover 8. The exhalation part is fixedly connected to the mask body 1 and the half-mask dual-interface frame 14 by an exhalation device composed of an exhalation valve cover 11, an exhalation valve 4, an exhalation valve seat 9, and an exhalation valve seat sealing ring 13.

[0051] The application of this invention in a single-port filter element of a respiratory protective half-mask (see appendix) Figure 9-12 When this invention is applied to a half-mask with a single interface, the sealing self-testing device is installed on the half-mask's single-interface frame and fixed to the main frame of the mask by the self-testing device cover 8. The exhalation part is fixedly connected to the main frame of the mask 1 and the half-mask frame 14 by an exhalation device consisting of an exhalation valve cover 11, an exhalation valve 4, an exhalation valve seat 9, and an exhalation valve seat sealing ring 13.

[0052] This utility model is applied to applications with dual interfaces (see appendix). Figure 13-14 It involves installing a self-testing device on the full-face dual-interface mask body 1, and fixing it to the mask body 1 via the self-testing device cover 8. The exhalation part is fixedly connected to the full-face mask body 1 and the full-face mask main frame (the full-face mask main frame mentioned here is the full-face mask mirror screen) through an exhalation device composed of an exhalation valve cover 11, an exhalation valve 4, an exhalation valve seat 9, and an exhalation valve seat sealing ring 13.

[0053] This utility model is applied to all single-interface devices (see appendix). Figure 15-16It involves installing a self-testing device on the main body 1 of a full-face single-interface mask, and fixing it to the main body 1 of the mask through the self-testing device cover 8. The exhalation part is fixedly connected to the main body 1 of the full-face mask and the main frame of the full-face mask (the main frame of the full-face mask mentioned here is the full-face mask mirror screen) through an exhalation device composed of an exhalation valve cover 11, an exhalation valve 4, an exhalation valve seat 9, and an exhalation valve seat sealing ring 13.

[0054] The above description is merely a preferred embodiment of the present utility model. The above examples do not limit the substantive content of the present utility model in any way. Any simple modifications or variations made by those skilled in the art to the above specific embodiments based on the technical essence of the present utility model after reading this specification, as well as equivalent embodiments that may be changed or modified using the disclosed technical content, shall still fall within the scope of the technical solution of the present utility model and shall not depart from the essence and scope of the present utility model.

Claims

1. A respirator equipped with a self-sealing self-testing device, comprising a mask body (1), a spring-loaded button (2), an inhalation valve seat channel (3), an inhalation valve (4), a filter element interface (5), an airway (6), and a locking ring (7), characterized in that: The mask body (1) has a T-shaped buckle groove (101), and the rear end of the air passage (6) has a T-shaped buckle (601). The rear end of the air passage (6) is fastened into the T-shaped buckle groove (101) of the mask body (1) by the T-shaped buckle (601). The annular hole in the middle of the front end of the air passage (6) is fitted onto the skeleton protrusion ring of the mask body (1), fixing the front end of the air passage (6) to the mask body (1). The inhalation valve seat is connected to the air passage. After passing through the annular hole in the middle of the air passage (6), the channel (3) is inserted into the middle hole of the mask body (1). The inhalation valve seat channel (3) is fixed on the mask body (1) by the locking ring (7). The inhalation valve (4) is installed in the valve seat hole at the rear end of the inhalation valve seat channel (3). The elastic button (2) is installed in the front end of the inhalation valve seat channel (3). The button (201) on the elastic button (2) extends out of the front end of the inhalation valve seat channel (3).

2. A respiratory protective mask equipped with a self-sealing self-testing device according to claim 1, characterized in that: The airway (6) and the mask body (1) are assembled together by a T-shaped buckle (601) and a T-shaped buckle groove (101) to form a hollow cavity structure.

3. The respiratory protective mask with a self-checking device for tightness installed according to claim 1, characterized in that: The elastic button (2) is equipped with a self-testing device cover (8) at the front end, and the self-testing device cover (8) is pressed and fixed on the frame protrusion ring of the mask body (1).

4. A respiratory protective mask equipped with a self-sealing self-testing device according to claim 1, characterized in that: The filter element interface (5) has a circular buckle (501). One end of the filter element interface (5) with the circular buckle (501) is fixed to the circular hole of the airway (6), and the other end of the filter element interface (5) is pressed onto the frame of the mask body (1). The airway (6) and the frame of the mask body (1) are connected through the filter element interface (5).

5. A respiratory protective mask equipped with a self-sealing self-testing device according to claim 1, characterized in that: The filter element interface (5) is fitted with a filter element interface sealing ring (12) at the connection between the filter element interface (5) and the air passage (6).

6. A respiratory protective mask equipped with a self-sealing self-testing device according to claim 1, characterized in that: The mask body (1) and the frame of the mask body (1) are connected by an exhalation valve seat (9), and the exhalation valve (10) is installed in the valve seat hole of the exhalation valve seat (9).

7. A respiratory protective mask equipped with a self-sealing self-testing device according to claim 6, characterized in that: The connection between the exhalation valve seat (9) and the half-mask dual-interface frame (14) is equipped with an exhalation valve seat sealing ring (13).

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