A small and light air supply valve breathing half face mask

Abstract

A compact and lightweight half-face mask with an air supply valve includes a half-face mask, a spring-loaded exhalation valve, and a small air supply valve. The small air supply valve is installed in the middle interface of the half-face mask through the main housing of the air supply valve. An air supply valve stem is located inside the main housing. An opening at the bottom of the main housing allows the bottom end of the air supply valve stem to extend out. A rear cover is located on the upper part of the main housing. The small air supply valve includes a positive pressure on-demand air supply component, a switch component, a connecting connector, and a medium-pressure pipe. The top of the connecting connector is threaded to the bottom end of the air supply valve stem at the opening, and the bottom of the connecting connector is connected to the medium-pressure pipe. The switch component includes a switch spring located inside the main housing of the air supply valve. A switch sliding plane sealing frame is located on top of the switch spring. A switch diaphragm is located on top of the switch sliding plane sealing frame. A switch sealing seat is located on top of the switch diaphragm. A diaphragm base plate is located on top of the switch sealing seat. This device features high safety protection, economy, and portability, and eliminates the need for frequently replaced filter consumables.

Description

Technical Field

[0001] This invention relates to the field of half-face mask technology, specifically a compact and lightweight half-face mask with an air supply valve. Background Technology

[0002] A half-face mask is a component of a gas mask, as opposed to a full-face mask. It blocks contact between the mouth and nose and the outside air, isolating the face from polluted air. It protects against dust, smoke, fog, vapor, and small microorganisms. With the addition of activated carbon filters, it can also protect against odors and mild harmful gases. It is widely used in industries such as welding, gas welding, machining, construction, blasting, demolition, grinding, woodworking, stone processing, metal casting, coal mining, and stone quarrying. Used in conjunction with a filter cartridge, it provides respiratory protection. Commonly available on the market, it is made of silicone and often features a reverse-folded edge design to enhance airtightness. It comes with an adjustable headband to secure it to the head and has clips on both sides for use with the filter cartridge.

[0003] In the current field of half-face respirator protection, activated carbon filter cartridges are commonly used for protection. When personnel work in environments with harmful gases or dust within a certain concentration range, protection using activated carbon filter half-face masks requires frequent filter cartridge replacement, wasting a lot of resources and being very detrimental to environmental protection. Existing air supply valves on the market are large and heavy, only suitable for full-face mask use. In order to better protect and utilize natural resources and more effectively protect people's health, we must make innovative breakthroughs. To this end, we have designed a compact and lightweight air supply valve breathing half-face mask to solve the above technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a compact and lightweight half-mask with an air supply valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A compact and lightweight half-mask with an air supply valve includes a half-mask, a spring-loaded exhalation valve, and a small air supply valve. The small air supply valve is mounted to the middle interface of the half-mask via a main air supply valve housing. An air supply valve stem is located within the main air supply valve housing. An opening at the bottom of the main air supply valve housing allows the bottom end of the air supply valve stem to extend. A rear cover is located at the top of the main air supply valve housing. The small air supply valve includes a positive pressure on-demand air supply component, a switch component, a connecting connector, and a medium-pressure pipe. The top of the connecting connector is threaded to the bottom end of the air supply valve stem at the opening, and the bottom of the connecting connector is connected to the medium-pressure pipe. The switch component includes an opening located within the main air supply valve housing. The switch spring has a switch sliding plane sealing frame on top, a switch diaphragm on top of the switch sliding plane sealing frame, a switch sealing seat on top of the switch diaphragm, and a diaphragm base plate on top of the switch sealing seat. The positive pressure on-demand air supply component includes a medium-pressure reverse air pressure elastic sealing valve core, a low-pressure sealing core, a positive pressure spring, and a diaphragm. The diaphragm is mounted on the diaphragm base plate. A fixing seat is provided on the right side of the main housing of the air supply valve. A groove for placing the positive pressure spring is opened on the top of the fixing seat. A first through hole is provided on the right side of the groove. A low-pressure sealing core is inserted into the first through hole. A medium-pressure reverse air pressure elastic sealing valve core is provided at the right end of the air supply valve stem.

[0007] As a preferred embodiment of the present invention: the spring-loaded exhalation valve includes a breathing valve plate, a breathing valve spring, and a breathing valve cover. A breathing valve seat is provided on the half-mask, a breathing valve plate is installed on the exhalation valve seat, a breathing valve spring is provided between the breathing valve cover and the breathing valve plate, and the breathing valve cover is fixed to the breathing valve seat by a bayonet or thread.

[0008] As a further preferred embodiment of the present invention: the switch assembly is disposed in the inner hole on the right side of the main housing of the gas supply valve. The switch assembly includes a manually pressable switch cap, which is disposed inside the inner hole. A switch top rod is provided inside the switch cap, and a switch spring is connected to the switch top rod. A slot is provided on the switch top rod, and a switch sliding plane sealing bracket is inserted into the slot.

[0009] As a further preferred embodiment of the present invention: the fixed base is provided with a second through hole communicating with the first through hole, the left side of the fixed base is provided with an inner interface, the right end of the air supply valve rod is connected to the second through hole through the inner interface, and an O-ring is provided on the air supply valve rod.

[0010] As a further preferred embodiment of the present invention: a protrusion is provided on the inner top surface of the rear cover near the fixing seat, and the protrusion abuts against the diaphragm substrate.

[0011] As a further preferred embodiment of the present invention, the connecting joint includes a straight-through joint and an elbow joint.

[0012] As a further preferred embodiment of the present invention, the small air supply valve and the half-mask are connected by a snap-fit ​​or threaded connection.

[0013] As a further preferred embodiment of the present invention: the half-mask is provided with a side interface, and a small air supply valve can be installed on the side interface.

[0014] As a further preferred embodiment of the present invention: the main body of the small air supply valve is round or square, and it is connected and fixed to the back cover by a snap-fit ​​method or a threaded method.

[0015] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention can realize the function of a positive pressure exhalation valve. Typically, when the air pressure inside the half-mask exceeds the design value of 50-400Pa, the exhalation valve opens to exhale gas, thereby achieving positive pressure protection inside the half-mask, which is much safer and more reliable than ordinary filter-type protection. Addressing the limitation of half-masks in bearing heavy loads, this device adopts a simplified interface design, eliminating the bypass valve function for full-face masks. It features a compact, on-demand air supply valve structure, and installs a spring-loaded exhalation valve and a small air supply valve on the half-mask. These two valves work together to perfectly integrate with the half-mask, providing high safety, economy, and portability. It eliminates the need for frequently replaced filter consumables, saving society a significant amount of natural resources and more effectively protecting people's health. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention;

[0018] Figure 3 for Figure 2 Sectional view along the AA direction;

[0019] Figure 4 This is an exploded view of a partial structure of the present invention;

[0020] Figure 5 This is a schematic diagram of the overall structure under another usage method of the present invention.

[0021] The components are: 1-half mask, 2-rear cover, 3-breathing valve plate, 4-breathing valve spring, 5-breathing valve cover, 6-breathing valve seat, 7-medium pressure pipe, 8-connecting joint, 9-air supply valve rod, 10-O-ring seal, 11-medium pressure reverse air pressure elastic sealing valve core, 12-switch cap, 13-switch top rod, 14-switch spring, 15-air supply valve main housing, 16-low pressure sealing core, 17-positive pressure spring, 18-switch spring, 19-switch sliding plane sealing frame, 20-switch diaphragm, 21-switch sealing seat, 22-diaphragm, 23-diaphragm base plate, 24-protrusion. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Please see Figure 1-5In this embodiment of the invention, a compact and lightweight half-mask with an air supply valve includes a half-mask 1, a spring-loaded exhalation valve, and a small air supply valve. The small air supply valve is installed on the middle interface of the half-mask 1 via a main housing 15. An air supply valve rod 9 is provided inside the main housing 15. An opening is provided at the bottom of the main housing 15 for the bottom end of the air supply valve rod 9 to extend out. A rear cover 2 is provided at the top of the main housing 15. The small air supply valve includes a positive pressure on-demand air supply component, a switch component, a connecting connector 8, and a medium-pressure pipe 7. The top of the connecting connector 8 is threaded to the bottom end of the air supply valve rod 9 at the opening, and the bottom of the connecting connector 8 is connected to the medium-pressure pipe 7. The switch component includes a switch spring 18 disposed inside the main housing 15. The top of the switch spring 18 is provided with a switch sliding plane sealing frame 19, the top of the switch sliding plane sealing frame 19 is provided with a switch diaphragm 20, the top of the switch diaphragm 20 is provided with a switch sealing seat 21, and the top of the switch sealing seat 21 is provided with a diaphragm base plate 23. The positive pressure on-demand air supply component includes a medium-pressure reverse air pressure elastic sealing valve core 11, a low-pressure sealing core 16, a positive pressure spring 17, and a diaphragm 22. The diaphragm 22 is installed on the diaphragm base plate 23. The right side of the main housing 15 of the air supply valve is provided with a fixing seat. The top of the fixing seat is provided with a groove for placing the positive pressure spring 17. The right side of the groove is provided with a first through hole. The low-pressure sealing core 16 is inserted into the first through hole. The right end of the air supply valve rod 9 is provided with a medium-pressure reverse air pressure elastic sealing valve core 11.

[0026] Furthermore, the fixed base is provided with a second through hole that communicates with the first through hole, and the left side of the fixed base is provided with an inner interface. The right end of the air supply valve rod 9 communicates with the second through hole through the inner interface, and the air supply valve rod 9 is provided with an O-ring seal 10.

[0027] Furthermore, a protrusion 24 is provided on the inner top surface of the back cover 2 near the fixing seat, and the protrusion 24 abuts against the diaphragm substrate 23; the diaphragm substrate 23 serves as a positive pressure lever, while the protrusion 24 serves as a lever fulcrum.

[0028] Furthermore, the connector 8 includes a straight connector and an elbow connector, which can be used in two ways: direct connection and elbow connection, depending on the wearer's habits or actual usage needs, thus providing high flexibility in use.

[0029] Furthermore, the small air supply valve is connected to the half-mask 1 by snap-fit ​​or thread, which is compact, easy to disassemble and assemble, and convenient for maintenance.

[0030] Furthermore, the half-mask 1 is also equipped with a side interface, and a small air supply valve can also be installed at the side interface, which improves the flexibility of the device and makes it easier to use.

[0031] Furthermore, the main body of the small air supply valve is round or square, and it is connected and fixed to the rear cover 2 by snap-fit ​​or threaded connection.

[0032] The spring-loaded exhalation valve includes a breathing valve plate 3, a breathing valve spring 4, and a breathing valve cover 5. A breathing valve seat 6 is provided on the half-mask 1, and the breathing valve plate 3 is installed on the exhalation valve seat 6. The breathing valve spring 4 is provided between the breathing valve cover 5 and the breathing valve plate 3. The breathing valve cover 5 is fixed to the breathing valve seat 6 by a snap or thread to realize the function of a positive pressure exhalation valve. Usually, when the air pressure inside the half-mask 1 is greater than the design value of 50-400Pa, the exhalation valve opens to exhale gas, thereby realizing positive pressure protection inside the half-mask, which is much safer and more reliable than ordinary filter protection. It is worth noting that when using this device, usually only one spring-loaded breathing valve is used on the half-mask 1, that is, only one breathing valve seat 6 needs to be assembled and used.

[0033] The switch assembly is located in the inner hole on the right side of the main housing 15 of the gas supply valve. The switch assembly includes a manually pressable switch cap 12, which is located inside the inner hole. A switch push rod 13 is provided inside the switch cap 12. A switch spring 14 is connected to the switch push rod 13. A slot is provided on the switch push rod 13, and a switch sliding plane sealing bracket 19 is inserted into the slot.

[0034] Specifically, the switch assembly in this device can realize the switching function. When the switch cap 12 is pressed, the switch rod 13 overcomes the elastic force of the switch spring 14 and moves to the center position. When it reaches a certain position, the switch spring 18 will spring up, lifting the switch sliding plane sealing bracket 19 inserted in the slot of the switch rod 13, which will then press against the switch diaphragm 20, blocking the small hole in the middle of the switch diaphragm 20. After closing, the air pressure in the inner cavity of the diaphragm 22 increases. The diaphragm base plate 23 acts as a positive pressure lever, which, through the lever fulcrum, makes the diaphragm overcome the positive pressure spring force and seal with the low-pressure sealing core 16. At the same time, the medium-pressure reverse air pressure elastic sealing valve core 11 receives the air pressure in the right cavity. Reverse pressure seals the valve to the right end of the air supply valve stem 9, thus closing the air supply valve; conversely, it opens the air supply valve to supply air. Addressing the limitation of half-masks in bearing heavy loads, this device employs a simplified interface design, eliminating the bypass valve function for full-face masks. It features a compact, on-demand air supply valve structure, and a spring-loaded exhalation valve and a small air supply valve are installed on the half-mask 1. These two components work together to perfectly integrate with the half-mask. This solution offers high safety, economy, and portability, eliminating the need for frequently replaced filter consumables, saving significant amounts of natural resources, and more effectively protecting people's health.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A compact and lightweight half-mask with an air supply valve, comprising a half-mask (1), an exhalation valve with a spring, and a small air supply valve; characterized in that: The small air supply valve is installed on the middle interface of the half-face mask (1) through the main housing (15) of the air supply valve. The main housing (15) of the air supply valve is provided with an air supply valve rod (9). The bottom of the main housing (15) of the air supply valve is provided with a through-hole for the bottom end of the air supply valve rod (9) to extend. The upper part of the main housing (15) of the air supply valve is provided with a rear cover (2). The small air supply valve includes a positive pressure on-demand air supply component, a switch component, a connecting joint (8) and a medium pressure pipe (7). The top of the connecting joint (8) is threaded to the bottom end of the air supply valve rod (9) at the through-hole. The bottom of the connecting joint (8) is connected to the medium pressure pipe (7). The connection is as follows: the switching assembly includes a switch spring (18) disposed in the main housing (15) of the gas supply valve, a switch sliding plane sealing frame (19) is provided on the top of the switch spring (18), a switch diaphragm (20) is provided on the top of the switch sliding plane sealing frame (19), a switch sealing seat (21) is provided on the top of the switch diaphragm (20), and a diaphragm base plate (23) is provided on the top of the switch sealing seat (21). The positive pressure on-demand gas supply assembly includes a medium-pressure reverse air pressure elastic sealing valve core (11), a low-pressure sealing core (16), a positive pressure spring (17), and a diaphragm (22). (22) Mounted on the diaphragm substrate (23), the main housing (15) of the air supply valve has a fixing seat on the right side, and a groove for placing a positive pressure spring (17) is opened on the top of the fixing seat. A first through hole is provided on the right side of the groove, and a low-pressure sealing core (16) is inserted into the first through hole. A medium-pressure reverse air pressure elastic sealing valve core (11) is provided at the right end of the air supply valve rod (9). The switch assembly is set in the inner hole on the right side of the main housing (15) of the air supply valve. The switch assembly includes a manually pressed switch cap (12). The switch cap (12) is set inside the inner hole, and the switch cap (12) has a... A switch rod (13) is connected to a switch spring (14). The switch rod (13) has a slot. The switch sliding plane sealing frame (19) is inserted into the slot. The fixed seat has a second through hole that communicates with the first through hole. The left side of the fixed seat has an inner interface. The right end of the air supply valve rod (9) communicates with the second through hole through the inner interface. The air supply valve rod (9) has an O-ring (10). The inner top surface of the rear cover (2) near the fixed seat has a protrusion (24). The protrusion (24) abuts against the diaphragm substrate (23).

2. The compact and lightweight half-face mask with an air supply valve according to claim 1, characterized in that: The spring-loaded exhalation valve includes a breathing valve plate (3), a breathing valve spring (4), and a breathing valve cover (5). A breathing valve seat (6) is provided on the half-mask (1), and a breathing valve plate (3) is installed on the exhalation valve seat (6). A breathing valve spring (4) is provided between the breathing valve cover (5) and the breathing valve plate (3). The breathing valve cover (5) is fixed to the breathing valve seat (6) by a bayonet or thread.

3. A compact and lightweight half-face mask with an air supply valve according to claim 2, characterized in that: The connecting joint (8) includes a straight-through joint and an elbow joint.

4. A compact and lightweight half-face mask with an air supply valve according to claim 3, characterized in that: The small air supply valve is connected to the half-mask (1) by a snap-fit ​​or threaded connection.

5. A compact and lightweight half-face mask with an air supply valve according to claim 4, characterized in that: The half-mask (1) is provided with a side interface, and a small air supply valve can be installed on the side interface.

6. A compact and lightweight half-face mask with an air supply valve according to claim 5, characterized in that: The main body of the small air supply valve is round or square, and it is connected to the rear cover (2) by snap-fit ​​or threaded connection.

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