Air purification and air supply welding protective helmet structure

Abstract

The present invention belongs to the technical field of protective helmets, and particularly relates to an air purification and air supply welding protective helmet structure, comprising a helmet main body, a welding face shield, and a protective face shield. The welding face shield is rotatably connected to the front side of the helmet main body and is used for protecting the face, eyes, mouth, and nose. The air purification and air supply welding protective helmet structure further comprises an air duct and an air purification and air supply device. The air duct is arranged inside the helmet main body and is provided with an air outlet and an air inlet. The air outlet is located on the bottom side of the front end of the helmet main body, enabling an airflow to be directed towards the face. The air purification and air supply device is connected to the air inlet and is used for inputting purified air into the air duct. Since the air outlet of the air duct extends to the bottom side of the front end of the helmet main body, the purified air blown out from the air outlet can be directly blown to the face, mouth, and nose of a human body, thereby bringing greater comfort to the worker. Moreover, the air purification and air supply device and a battery are arranged on the back side of the helmet main body, thus eliminating the need for an external power supply and a pipe for the purified air, making the helmet structure very convenient to wear and not restricting the movement space of the worker.

Description

An air-purifying and air-supplying welding protective helmet structure Technical Field

[0001] This invention belongs to the field of protective helmet technology, and particularly relates to an air-purifying and air-supplying welding protective helmet structure. Background Technology

[0002] Welding helmets are used in the field of electric welding machines to provide reasonable protection for workers, preventing injuries to their head, face, and eyes. A welding helmet typically consists of a main body and a welding protective visor. During welding, the welding protective visor needs to be lowered to cover the face, thus protecting the face and eyes.

[0003] For example, Chinese patent document CN111132573A discloses a welding helmet including a head suspension system and a protective shield. The protective shield has or forms a viewing window. The welding helmet also includes a first neck shield. The protective shield has a lower end, and the first neck shield is removably attached to the lower end of the protective shield. It can be used with the neck shield in a forced air mode, where the neck shield completely covers the front of the wearer's neck, and it can also be used in a non-air mode, where air is allowed to reach the wearer's mouth and / or nose through a gap or space between the wearer's chin and chest via the different neck shield. The helmet has an inlet for connecting the welding helmet to an air supply via a hose (not shown). Such an air supply can be provided, for example, by a powered air purification unit (such as that known in the field of electrically powered air-purifying respirators (PAPR)). Thus, the wearer of the welding helmet can be supplied with forced fresh air between the protective shield and the wearer's head (and face).

[0004] As can be seen, the technical solution for the welding helmet disclosed in the aforementioned patent document involves introducing purified air from the outside into the helmet to provide purified air for human respiration. However, the technical solution disclosed in this patent document provides the wearer with a forced supply of fresh air between the protective shield and the wearer's head (and face) after the air enters the helmet. Because workers sweat on their head and face while wearing the helmet, the air inside the helmet will have a sweaty odor, causing discomfort. Furthermore, the face and forehead typically have flowing sweat, requiring workers to frequently remove the helmet for ventilation, causing inconvenience. Summary of the Invention

[0005] The purpose of this invention is to provide an air-purifying welding protective helmet structure that solves the problem that existing welding helmets are unsuitable and inconvenient for workers.

[0006] To achieve the above objectives, this invention provides an air-purifying and air-supplying welding protective helmet structure for welding protection. It includes a helmet body and a welding face shield, the welding face shield being rotatably connected to the front side of the helmet body for protecting the face, eyes, and mouth and nose. It also includes an air duct and an air-purifying and air-supplying device. The air duct is located inside the helmet body and has an air outlet and an air inlet. The air outlet is located on the front bottom side of the helmet body, allowing airflow to be directed towards the face. The air-purifying and air-supplying device is connected to the air inlet for supplying purified air into the air duct.

[0007] Furthermore, the helmet body has a mounting cavity on the back side, and the air purification and air supply device is located inside the mounting cavity.

[0008] Furthermore, the air purification and air supply device includes a filter element, a blower, and a filter element cover plate; the filter element is disposed in the mounting cavity, the filter element cover plate covers the opening of the mounting cavity and limits the filter element within the mounting cavity; the bottom wall of the mounting cavity is provided with air holes, the blower is connected to the bottom wall and communicates with the air holes.

[0009] Furthermore, the helmet body is provided with an inner shell on an inner side closer to the mounting cavity. The inner shell and the bottom wall of the mounting cavity form an isolation cavity, and the blower is located inside the isolation cavity.

[0010] Furthermore, the bottom end of the inner shell is provided with a bottom plate, which seals the bottom of the isolation cavity; the bottom plate is provided with a battery compartment extending into the isolation cavity, and the battery compartment is provided with a battery for providing power to the blower.

[0011] Furthermore, a control circuit is also provided inside the isolation cavity. The control circuit is connected to the battery and the blower, and the control buttons of the control circuit are located on the bottom side of the base plate.

[0012] Furthermore, the blower is a centrifugal blower and is located on the outer wall of the mounting cavity. The air inlet of the centrifugal blower is sealed and connected to the air hole. The air outlet of the centrifugal blower extends upward in a curved manner. One end of the air duct extends into the isolation cavity. The air inlet is fitted onto the air outlet. The inner shell supports one end of the air duct.

[0013] Furthermore, a bracket is provided on the bottom front side of the helmet body. The bracket has a flat hole, and a protruding ring extends upward from the edge of the flat hole. The air outlet is fitted onto the protruding ring, so that the bracket supports the air outlet end of the air duct.

[0014] Furthermore, the air duct gradually widens from the air inlet to the air outlet, forming a silent cavity within the air duct.

[0015] Furthermore, a limit switch is provided on the inner side of the helmet body. One end of the limit switch extends through the bottom wall into the mounting cavity to limit the filter element, so that the filter element and the bottom wall form a cavity.

[0016] Furthermore, the air-purifying welding protective helmet structure also includes a protective face shield, which is rotatably connected to the front side of the helmet body and located inside the welding face shield; the protective face shield is provided with transparent optical lenses.

[0017] Furthermore, the helmet body has connecting shafts on both sides, and multiple first slots along the connecting shafts. The protective face shield extends with two first connecting parts, which are rotatably sleeved on the connecting shafts. The inner side of the first connecting part has a first locking tooth, which is limited within the first slot. The outer side of the first connecting part has multiple second slots. The welded face shield extends with two second connecting parts, which are connected to the corresponding connecting shafts and are located outside the first connecting parts. The inner side of the second connecting part has a second locking tooth, which is limitedly connected to the second slot.

[0018] Furthermore, the welding mask is provided with a sealing cover on the side closer to the face. The sealing cover and the inner side of the welding mask form a receiving cavity. A clearance opening is provided on one side of the sealing cover. The edge of the clearance opening is used to fit the jaw and side of the face.

[0019] The above-mentioned technical solutions in the air-purifying and air-supplying welding protective helmet structure provided in the embodiments of the present invention have at least the following technical effects:

[0020] 1. The helmet features an internal air duct with an air inlet connected to an air purification and delivery device. This device allows filtered and purified air to be delivered into the duct. Since the air outlet extends to the front bottom of the helmet, the purified air blown out directly onto the face. This allows the wearer to breathe the purified air directly, avoiding the presence of sweat odor. Furthermore, the direct airflow onto the face helps to cool and dry the skin, preventing discomfort caused by sweat dripping onto the face and eyes.

[0021] 2. The air purification and ventilation device and battery are located on the back of the helmet body, so there is no need for an external power supply or air purification ducts, making it very convenient to wear and not restricting the operator's movement space. Furthermore, the welded face shield and air purification and ventilation device are positioned on the front and back sides of the head body, which also provides a counterweight effect, preventing the front from being too heavy and causing imbalance and discomfort. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 is a structural diagram of the air-purifying and air-supplying welding protective helmet structure provided in an embodiment of the present invention.

[0024] Figure 2 is an internal structural diagram of the air purification and air supply welding protective helmet structure provided in an embodiment of the present invention.

[0025] Figure 3 is a cross-sectional view of the air-purifying and air-supplying welding protective helmet structure provided in an embodiment of the present invention.

[0026] Figure 4 is an exploded view of the air purification and air supply welding protective helmet structure provided in an embodiment of the present invention.

[0027] Figure 5 is a schematic diagram of the welding mask of the air-purifying welding protective helmet structure provided in an embodiment of the present invention being opened.

[0028] Figure 6 is a structural diagram of the protective face shield of the air-purifying and air-supplying welding protective helmet structure provided in an embodiment of the present invention.

[0029] Figure 7 is a structural diagram of the welding face shield of the air-purifying and air-supplying welding protective helmet structure provided in an embodiment of the present invention.

[0030] Figure 8 is a structural diagram of the air-purifying and air-supplying welding protective helmet with a sealing cover provided in an embodiment of the present invention.

[0031] Figure 9 is a cross-sectional view of the air-purifying welding protective helmet with a sealing cover provided in an embodiment of the present invention. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "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 the embodiments of the present invention 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. Therefore, they should not be construed as limitations on the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0036] In one embodiment of the air-purifying and air-supplying welding protective helmet structure of the present invention, please refer to Figures 1 to 4. This embodiment of the air-purifying and air-supplying welding protective helmet structure is used for welding protection, providing protection for the worker's head, face, and eyes. Specifically, it includes a helmet body 100, a welding mask 200, an air duct 400, and an air-purifying and air-supplying device 300. The welding mask 200 is rotatably connected to the front side of the helmet body 100, providing protection for the face and eyes. The air duct 400 is located inside the helmet body 100 and has an air outlet 401 and an air inlet 402. The air outlet 401 extends to the bottom front end of the helmet body 100, allowing the airflow from the air outlet 401 to directly blow onto the face. The air-purifying and air-supplying device 300 is connected to the air inlet 402 and is used to input purified air into the air duct 400. Specifically, in this embodiment, since an air duct 400 is provided inside the helmet body 100, and the air inlet 402 of the air duct 400 is connected to an air purification and air supply device 300, filtered and purified air can be delivered into the air duct 400 through the air purification and air supply device 300. Because the air outlet of the air duct 400 extends to the front bottom side of the helmet body 100, the purified air blown out from the air outlet 401 can directly blow onto the person's face; therefore, the person can breathe the purified air themselves, avoiding the purified air being mixed with sweat odor. Furthermore, the air blowing directly onto the person's face can dissipate heat and cool the face, removing sweat and preventing discomfort caused by sweat flowing on the face and eyes.

[0037] Furthermore, to further protect workers, the air-purifying welding protective helmet of this embodiment includes a sealing cover 900 on the side of the welding mask 200 closer to the face. Referring specifically to Figures 8 and 9, the sealing cover 900 and the inner side of the welding mask 200 form a receiving cavity 901. One side of the sealing cover 900 has an opening 902, the edge of which is designed to fit against the jaw and side of the face. Specifically, when worn, the helmet body 100 is placed on the head, and the welding mask 200 is folded down to cover the face. The worker's face enters the receiving cavity 901 through the opening 902, and the edge of the opening 902 fits against the jaw and side of the face, thus protecting the face within the receiving cavity 901 and preventing external dust and other contaminants from entering. Furthermore, the welding mask 200 has a mounting groove on its side, and the edge of the sealing cover 900 is inserted into the mounting groove, so that the sealing cover 900 and the welding mask 200 are combined into one unit.

[0038] Furthermore, referring to Figures 1 and 4, a mounting cavity 101 is provided on the back side of the helmet body 100, and the air purification and ventilation device 300 is disposed within the mounting cavity 101. In this embodiment, the air purification and ventilation device 300 is disposed within the mounting cavity 101 of the helmet body 100, making it convenient to wear and allowing for greater freedom of movement. In addition, the air purification and ventilation device 300 and the welded face shield 200 counterweight each other, ensuring a balanced force distribution between the front and back, preventing the front from being too heavy and causing an imbalance that could increase discomfort. Furthermore, a battery 500 is also provided inside the helmet body 100, which directly provides power to the air purification and ventilation device 300, thus eliminating the need for an external power source.

[0039] Further referring to Figure 4 of Figure 1, the air purification and air supply device 300 includes a filter element 310, a blower 320, and a filter element cover plate 330. The filter element 310 is disposed in the mounting cavity 101, and the filter element cover plate 330 covers the opening of the mounting cavity 101 and limits the filter element 310 within the mounting cavity 101; the filter element cover plate 330 is provided with multiple air slots. The bottom wall 102 of the mounting cavity 101 is provided with air holes 103, and the blower 320 is connected to the bottom wall 102 and the blower 320 is connected to the air holes 103. In this embodiment, the blower 320 generates suction, causing air to enter the air duct 400 after being filtered by the filter element 310, thereby purifying the air entering the helmet body 100.

[0040] Further referring to Figures 2 and 3, the helmet body 100 also has an inner shell 600 closer to the mounting cavity 101 on its inner side. The inner shell 600 and the bottom wall 102 of the mounting cavity 101 form an isolation cavity 104, and the blower 320 is located inside the isolation cavity 104. In this embodiment, the blower 320 is located inside the isolation cavity 104, which is spaced apart from the mounting cavity 101. Therefore, when replacing the filter element 330, the structure of the blower 320 will not be affected. In addition, the location of the blower 320 inside the isolation cavity 104 makes it easier to connect the air duct 400 to the blower 320.

[0041] Further, referring to Figures 2 to 4, the bottom end of the inner shell 600 is provided with a bottom plate 601, which seals the bottom of the isolation cavity 104. The bottom plate 601 has a battery compartment 602 extending into the isolation cavity 104, which is used to install the battery 500. This makes the overall structure more compact, saves space, and facilitates the replacement of the battery 500.

[0042] Furthermore, referring to Figure 4, a control circuit 700 is also provided inside the isolation cavity 104. The control circuit 700 is connected to the battery 500 and the blower 320. The control button 701 of the control circuit 700 is located on the bottom side of the base plate 601.

[0043] Further referring to Figures 3 and 4, the blower 320 is a centrifugal fan and is located on the outer wall of the mounting cavity 101. The air inlet of the centrifugal fan is sealed and connected to the air hole 103, and the air outlet 321 of the centrifugal fan extends upward in a curved manner. One end of the air duct 400 extends into the isolation cavity, and the air inlet 402 is fitted onto the air outlet 321 of the blower 320. The inner shell 600 supports the air inlet end of the air duct 400. In this embodiment, the air outlet 321 of the blower 320 extends in a curved manner, thus facilitating the connection between the air duct 400 and the blower 320. Furthermore, the use of a centrifugal fan in the blower 320 allows for better delivery of purified air into the air duct 400.

[0044] Furthermore, referring to Figures 2 and 4, a bracket 110 is provided on the bottom front end of the helmet body 100. The bracket 110 has a flat hole 111, and a protruding ring 112 extends upward from the edge of the flat hole 111. The air outlet 401 is fitted onto the protruding ring 112, so that the bracket 110 supports the air outlet end of the air duct 400. Therefore, the air duct 400 can be supported by the inner shell 600 and the bracket 110 and fixed to the inside of the helmet body 100.

[0045] Furthermore, referring to Figure 2, the air duct 400 gradually widens from the air inlet 402 to the air outlet 401, forming a silent cavity within the air duct 400. In this embodiment, the cross-sectional width of the air duct 400 gradually widens, thus allowing for smoother airflow and reducing the pressure between the airflow and the inner wall of the air duct 400, thereby reducing noise through air friction.

[0046] Furthermore, referring to Figure 1, a limit switch 120 is also provided on the inner side of the helmet body 100. The main body of the limit switch 120 is located in the isolation cavity 104 and is connected to the control circuit 700. The other end of the limit switch 120 extends through the bottom wall 102 into the mounting cavity 101 to limit the filter element 310, so that the filter element 310 and the bottom wall form a cavity 311. Therefore, the filter element 310 will not cause partial filtration, but can make full use of the filtration of the filter element 310 to filter the air. In addition, by limiting the filter element 310 by the limit switch 120, when the filter element 310 does not touch the limit switch 120, the blower 320 will not start, avoiding the problem that the filter element 310 is not assembled into the sealed position, thus creating a gap with the inner wall of the mounting cavity 101 and failing to filter the air completely.

[0047] Furthermore, referring to Figures 5 to 7, the air-purifying welding protective helmet structure also includes a protective face shield 800, which is rotatably connected to the front of the helmet body 100 and located inside the welding face shield 200. The protective face shield 800 is provided with a transparent optical lens 801. The protective helmet of this embodiment can also be used to protect workers during grinding, polishing, cutting, and other operations. Specifically, when using the protective face shield 800, the welding face shield 200 can be flipped upwards, and the protective face shield 800 protects the face, and the transparent optical lens 801 on the protective face shield 800 does not obstruct the worker's vision.

[0048] Further, referring to Figures 5 to 7, the helmet body 100 has connecting shafts 130 on both sides, and multiple first slots 105 are provided along the connecting shafts 130. The protective face shield 800 extends with two first connecting portions 802, which are rotatably sleeved on the connecting shafts 130. The inner side of the first connecting portion 802 is provided with a first locking tooth 803, which is limited within the first slot 105. This allows the protective face shield 800 to have multiple opening angles when flipped up. The outer side of the first connecting portion 802 is provided with multiple second slots 804. The welded face shield 200 extends with two second connecting portions 201, which are connected to the corresponding connecting shafts 130 and are located outside the first connecting portions 802. The inner side of the second connecting portion 201 is provided with a second locking tooth 202, which is limitedly connected to the second slot 804. The welding mask 800 has multiple opening angles and can be flipped up and opened independently of the protective mask 800.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air purifying respirator welding helmet structure for welding protection, comprising a helmet main body and a welding mask, the welding mask is rotatably connected to the front side of the helmet main body for protecting the face and eyes; characterized in that, The helmet body is provided with an air duct and an air purification and air supply device.

2. The air purifying, forced air welding helmet structure of claim 1, wherein: The air purification and air supply device is arranged in the mounting cavity.

3. The air purifying, forced air welding helmet structure of claim 2, wherein: The air purification and air supply device comprises a filter core, a blower and a filter core cover plate.

4. The air purifying, forced air welding helmet structure of claim 3, wherein: The bottom wall of the mounting cavity is provided with an air hole, and the blower is connected to the bottom wall and communicates with the air hole.

5. The air purifying, forced air welding helmet structure of claim 4, wherein: The inner side of the helmet body is further provided with an inner shell.

6. The air purifying, forced air welding helmet structure of claim 5, wherein: The bottom end of the inner shell is provided with a bottom plate which seals the bottom of the isolation cavity.

7. The air purifying, forced air welding helmet structure of any of claims 4-6, wherein: The isolation cavity is further provided with a control circuit which is connected to the battery and the blower. The control circuit is provided with a control button on the bottom side of the bottom plate.

8. The air purifying, forced air welding helmet structure of claim 7, wherein: The blower is a centrifugal blower which is arranged on the outer side wall of the mounting cavity.

9. The air purifying, forced air welding helmet structure of claim 9, wherein: The inner shell supports one end of the air duct.

10. The air purifying, forced air welding helmet structure of any of claims 3-6, wherein: The front end of the helmet body is provided with a support which is provided with a flat hole.

11. The air cleaning and forced air welding helmet structure of claim 1, wherein: The air duct gradually widens from the air inlet to the air outlet, so that a mute cavity is formed in the air duct.

12. The air purifying, forced air welding helmet structure of claim 11, wherein: The inner side of the helmet body is further provided with a limit switch. The helmet body is further provided with a protective mask which is rotatably connected to the front side of the helmet body and located on the inner side of the welding mask. The protective mask is provided with transparent optical lenses. The helmet body is provided with connecting shafts on both sides thereof and a plurality of first clamping grooves along the connecting shafts. The first connecting portion is provided with first clamping teeth on the inner side thereof. The welding mask is provided with second connecting portions which are connected to the connecting shafts and located on the outer side of the first connecting portion. The second connecting portion is provided with second clamping teeth on the inner side thereof.

13. The air purifying, forced air welding helmet structure of any of claims 1-5, 11, 12, wherein: The welding mask is provided with a sealing cover on the side closer to the face, the sealing cover and the inner side of the welding mask form a containing cavity, one side of the sealing cover is provided with a clearance, and the edge of the clearance is used for being attached to the lower jaw and the side of the face.

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