Single-tank half mask capable of checking airtightness

Abstract

The utility model discloses a single-tank half mask capable of checking air tightness. The single-tank half mask comprises a mask body, a mask protecting soft body, a filter connecting seat, an exhalation valve, a bandage, an air tightness checking assembly and a protecting cover plate, the mask body is a shell with a cavity formed in the rear side, and the cavity is matched with the outline of the lower half portion of the face of the human body. The edge of the outline of the rear side of the cover body is hermetically connected with a surface protecting soft body; the protective face soft body is of a ring-shaped soft body structure with a cavity in the middle. An air inlet and an air outlet are formed in the front side of the cover body; a filter connecting seat is arranged at the air inlet of the mask body, and the filter is detachably connected with the filter connecting seat; an exhalation valve is arranged at the air outlet of the mask body; and the air tightness inspection assembly is arranged in the concave cavity of the cover body and is positioned on the inner side of the filter connecting seat. The single-tank half mask capable of detecting air tightness is simple and reasonable in structural design, stable and firm in connection and excellent in air tightness, and has a good protection effect; the air tightness of the mask can be quickly and effectively checked.

Description

Technical Field

[0001] This utility model relates to respiratory protection devices, and in particular to a single-canister half-face mask that can be checked for airtightness. Background Technology

[0002] A dust / gas respirator half-face mask is a respiratory protection device that, by replacing different types of filters and absorbent canisters, is compatible with various working environments. It protects the respiratory organs and face from dust, bacteria, or toxic and harmful gases.

[0003] Depending on the usage scenario and protection requirements, respiratory protective masks can be divided into various types. Half-masks cover the mouth and nose when used, are suitable for environments with low concentrations of pollutants, and are more convenient to wear. Half-masks typically consist of an outer shell, a face mask, a sealing ring, a filter and its components, and a valve and its components. Existing half-masks have problems such as insufficient airtightness at the connection between the mask body and the face shield, insufficient airtightness between the valve and the mask body, poor fit between the face shield and the facial contours, and unstable and secure connections. Therefore, there is a need to design a half-mask that can self-check its airtightness. Utility Model Content

[0004] The purpose of this invention is to provide a single-canister half-face mask that can be checked for airtightness. Its structure is simple and reasonable, the connection is stable and reliable, the airtightness is excellent, and it has a good protective effect. It can quickly and effectively check the airtightness of the mask.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A single-canister half-face mask capable of airtightness inspection includes a mask body, a face shield, a filter connector, an exhalation valve, straps, an airtightness inspection assembly, and a protective cover.

[0007] The cover is a shell with a recessed cavity on the back, which conforms to the contour of the lower half of the human face. A face-protecting soft body is seamlessly connected to the edge of the rear contour of the cover, allowing the face-protecting soft body to contact the facial skin during wear, reducing pressure and friction, and improving wearing comfort. The face-protecting soft body is a ring-shaped soft structure with a hollow cavity in the middle, and can be made of TPE material.

[0008] The front side of the cover is provided with an air inlet and an air outlet;

[0009] The air inlet of the hood is equipped with a filter connector, and the filter is detachably connected to the filter connector; the air outlet of the hood is equipped with an exhalation valve, and a protective cover is provided on the outside of the exhalation valve, which is hinged to the hood.

[0010] The exhalation valve is a one-way valve. When exhaling, if the air pressure inside the concave cavity of the mask is higher than the external air pressure, the valve plate is pushed open, allowing air to escape to the outside. When the air pressure inside the concave cavity is less than or equal to the external air pressure, the valve plate resets, blocking the air outlet. This is existing technology and will not be described in detail here.

[0011] The filter connector includes a connector and an air intake valve. The connector is fixed on the cover, and the air intake valve is movably connected to the connector. The main structure of the air intake valve is attached to the inner wall of the connector, and the air intake valve and the inner wall of the connector can form an opening and closing gap. The air intake valve is usually made of rubber and has a certain deformation performance.

[0012] The airtightness inspection component is located in the recess of the cover and inside the filter connector.

[0013] The airtightness inspection assembly includes a pressure plate, a handle, a rotating shaft, a swing arm, and a pivot. The outer surface of the pressure plate is a flat panel used to press the intake valve plate during testing. Its top end is connected to the pivot, and its lower section has a limiting claw. The pivot is rotatably connected to an ear seat on the cover. The rotating shaft is horizontally positioned, with handles connected to both ends. The middle section is connected to the swing arm, and the middle section also has a horizontally positioned limiting groove. The swing arm is positioned within the limiting claw.

[0014] When checking the airtightness of the mask, rotate the handle to rotate the shaft, causing the lever to push the pressure plate outward. This pressure plate presses the air intake valve plate tightly against the inner wall of the connector, ensuring a tight seal at the air intake during inspection. Simultaneously, when the limit pawl engages with the limit groove, it provides self-locking and allows the fingers holding the handle to be released.

[0015] Preferably, the cover is provided with strap mounting holes, and the front side of the strap is connected to the strap mounting holes; in use, the rear side of the strap is fitted onto the back of the head.

[0016] Briefly describe its working principle:

[0017] Gas in the environment passes through the filter element (lower connection port) connected to the single-canister half-mask. After filtration, the inlet valve opens, and the exhaust valve closes to maintain a seal (due to the pressure difference between the inside and outside), allowing the gas to enter the mask. After breathing, exhalation opens the upper exhaust valve (on the same principle), and gas is expelled from the exhaust valve, expelling the warm, humid air inside, completing the breathing and ventilation process.

[0018] Inspection principle: By turning the handle, the intake valve plate is fixed, so that gas cannot enter through the valve plate.

[0019] Inspection method and steps:

[0020] 1. Rotate the handles on both sides of the mask downwards by 90°. (Close)

[0021] 2. As you inhale gently (slowly), check if air is flowing into the area where the mask contacts your face. (You should feel your face gripping the respirator.)

[0022] 3. Turn the handle upwards 90°. (Release)

[0023] The beneficial effects of this utility model are:

[0024] Its structural design is simple and reasonable, the connection is stable and reliable, the airtightness is excellent, and it has a good protective effect; it can quickly and effectively check the airtightness of the mask. Attached Figure Description

[0025] Figure 1 This is a front view of a single-canister half-face mask capable of airtightness inspection according to the present invention.

[0026] Figure 2 For Figure 1 A cross-sectional view along the AA direction;

[0027] Figure 3 This is a schematic diagram of the structure of a single-canister half-face mask capable of airtightness inspection according to the present invention (the face shield software is omitted);

[0028] Figure 4 for Figure 3 Rear view;

[0029] Figure 5 This is a schematic diagram of the structure of the airtightness inspection component and the exhalation valve (plate) of this utility model;

[0030] Figure 6 This is a schematic diagram of the handle adjustment of this utility model. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] like Figures 1-6 As shown, a single-canister half-face mask capable of airtightness inspection includes a mask body 1, a face shield 2, a filter connector 3, an exhalation valve 4, straps, an airtightness inspection assembly 5, and a protective cover 6.

[0033] The cover 1 is a shell with a recessed cavity 10 on the rear side, which conforms to the contour of the lower half of the human face. A face-protecting soft body 2 is sealed to the edge of the rear contour of the cover 1, allowing the face-protecting soft body 2 to contact the facial skin during wear, reducing pressure and friction, and improving wearing comfort. The face-protecting soft body 2 is a ring-shaped soft structure with a cavity in the middle, and can be made of TPE material.

[0034] The front side of the cover 1 is provided with an air inlet 70 and an air outlet 80;

[0035] The air inlet 70 of the cover 1 is provided with a filter connecting seat 3, and the filter is detachably connected to the filter connecting seat 3; the air outlet 80 of the cover 1 is provided with an exhalation valve 4, and a protective cover 6 is provided on the outside of the exhalation valve 4, and the protective cover 6 is hinged to the cover 1.

[0036] The exhalation valve 4 is a one-way valve. When exhaling, the air pressure inside the cavity 10 of the mask 1 is higher than the outside air pressure, pushing open the valve plate and exhaling to the outside. When the air pressure inside the cavity 10 of the mask 1 is less than or equal to the outside air pressure, the valve plate resets and blocks the air outlet 80. This is existing technology and will not be described in detail here.

[0037] The filter connector 3 includes a connector 31 and an air intake valve 32. The connector 31 is fixed on the cover 1, and the air intake valve 32 is movably connected to the connector 31. The main structure of the air intake valve 32 is attached to the inner wall of the connector 31, and the air intake valve 32 and the inner wall of the connector 31 can form an opening and closing gap. The air intake valve 32 is usually made of rubber and has a certain deformation performance.

[0038] The airtightness inspection component 5 is located in the cavity 10 of the cover 1 and is inside the filter connector 3.

[0039] The airtightness inspection assembly 5 includes a pressure plate 51, a handle 52, a rotating shaft 53, a swing rod 54, and a rotating shaft 55. The outer side of the pressure plate 51 is a flat panel used to press the air intake valve plate 32 during inspection. Its top end is connected to the rotating shaft 55, and its lower section is provided with a limiting claw 56. The rotating shaft 55 is rotatably connected to the ear seat 11 on the cover 1. The rotating shaft 53 is horizontally arranged, with handles 52 connected to both ends. The middle section is connected to the swing rod 54, and the middle section is also provided with a horizontally arranged limiting groove 57. The swing rod 54 is located within the limiting claw 56.

[0040] When checking the airtightness of the mask, rotate handle 52 to rotate shaft 53, causing lever 54 to push pressure plate 51 outward, pressing the air intake valve plate 32 against the inner wall of connector 31, ensuring the air intake 70 is sealed during inspection. Simultaneously, when limit pawl 56 engages with limit groove 57, it self-locks, freeing the fingers from turning handle 52.

[0041] Preferably, the cover 1 is provided with a strap mounting hole 12, and the front side of the strap is connected to the strap mounting hole 12; when in use, the rear side of the strap is fitted onto the back of the human head.

[0042] Preferably, the pressure plate 51, the rotating shaft 53, and the limiting claw 56 are integrally formed; the rotating shaft 53 and the swing rod 54 are integrally formed.

[0043] Preferably, a limiting knob 58 is provided on one side of the rotating shaft 55 to limit the rearward displacement of the rotating shaft 55 (but not its axial rotation). The limiting knob 58 is threadedly connected to the cover 1. The limiting knob 58 has a concave arc surface that is adapted to the rotating shaft 55. By rotating the limiting knob 58, the pressure plate 51 can be disassembled and the intake valve plate 32 can be replaced.

[0044] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A single-canister half-face mask capable of airtightness inspection, comprising a mask body, a face shield, a filter connector, an exhalation valve, and straps, characterized in that: It also includes airtightness inspection components and protective covers; The cover is a shell with a recessed cavity on the rear side, and the recessed cavity is adapted to the contour of the lower half of the human face; The rear contour edge of the cover is sealed with a protective soft body; the protective soft body is a ring-shaped soft body structure with a cavity in the middle. The front side of the cover is provided with an air inlet and an air outlet; The air inlet of the hood is equipped with a filter connector, and the filter is detachably connected to the filter connector; the air outlet of the hood is equipped with an exhalation valve. The airtightness inspection component is located in the recess of the cover and inside the filter connector.

2. The single-canister half-face mask capable of airtightness inspection according to claim 1, characterized in that: The airtightness inspection assembly includes a pressure plate, a handle, a rotating shaft, a swing rod, and a pivot. The outer side of the pressure plate is a flat panel, with the pivot connected to its top and a limiting claw at its lower section. The pivot is rotatably connected to the ear seat on the cover. The rotating shaft is horizontally positioned, with handles connected to both ends and a swing arm connected to its middle section; the swing arm is located within the limiting pawl.

3. The single-canister half-face mask capable of airtightness inspection according to claim 2, characterized in that: The middle section of the swing arm is also provided with a horizontally set limiting groove; the limiting claw is snapped into the limiting groove.

4. The single-canister half-face mask capable of airtightness inspection according to claim 3, characterized in that: The exhalation valve is equipped with a protective cover plate on the outside, which is hinged to the cover body.

5. The single-canister half-face mask capable of airtightness inspection according to any one of claims 1-4, characterized in that: The filter connector includes a connector and an air intake valve. The connector is fixed on the cover, and the air intake valve is movably connected to the connector.

6. The single-canister half-face mask capable of airtightness inspection according to claim 5, characterized in that: The main structure of the intake valve plate is attached to the inner wall of the connecting seat, and the intake valve plate and the inner wall of the connecting seat form an opening and closing gap.

7. The single-canister half-face mask capable of airtightness inspection according to claim 6, characterized in that: The cover is provided with strap mounting holes, and the front side of the strap is connected to the strap mounting holes.

8. The single-canister half-face mask capable of airtightness inspection according to any one of claims 2-4, characterized in that: The pressure plate, rotating shaft, and limiting claw are integrally formed; the rotating shaft and swing rod are integrally formed.

9. The single-canister half-face mask capable of airtightness inspection according to any one of claims 2-4, characterized in that: A limiting knob is provided on one side of the rotating shaft to limit the rearward displacement of the rotating shaft. The limiting knob is threadedly connected to the cover. The limiting knob has an inner concave arc surface that is adapted to the rotating shaft.

Images