Mask device

Abstract

A mask device includes a mask body including a front body and a rear body, a flow guide configured at a rear surface of a fan module to form a part of an outlet communicating with a breathing space, a filter case rotatably connected to the rear body to cover a filter, the filter case including a pair of filter frames extending in parallel toward each other, a filter cover connected to a rear surface of the pair of filter frames, a hinge extending from an edge of each of the filter frames, and a fastening hook extending from a side end of the filter case opposite to a side end where the hinge is formed to be engaged with the filter hook, the fastening hook including an extension extending from a front surface of the filter cover, an engaging portion formed at an end of the extension, the engaging portion including an engaging surface inclined toward an outer edge side of the filter case, a sliding surface curved from an end of the engaging surface and extending in a straight line shape, and a contact surface formed with a curvature from an end of the sliding surface.

Description

Technical Field

[0001] This invention relates to a mask device. Background Technology

[0002] A face mask can be defined as a hygiene product that filters harmful substances such as germs or dust from the air when the user inhales by covering the user's nose and mouth, and can minimize the spread of viruses or bad breath exhaled by the user to those around them.

[0003] Recently, due to the rampant spread and highly contagious virus, it is recommended that everyone wear masks when going out for safety reasons to minimize the risk of infection.

[0004] Currently, a variety of types and forms of masks are available on the market. In particular, many masks with filter modules are being sold to minimize the direct inflow of harmful substances in the air into the wearer's respiratory system.

[0005] In addition, many masks with built-in fans are also sold to allow for smooth airflow through the mask when the user inhales or exhales.

[0006] Existing masks, including those disclosed in European Patent EP3398657A (published on November 7, 2018), are equipped with filters that allow harmful substances contained in the outside air to enter the user's respiratory system after being filtered.

[0007] In addition, the mask is equipped with a pressure sensing unit for sensing the pressure of the breathing space formed between the mask and the user's face, and a fan module that changes its rotation speed according to the pressure sensed by the pressure sensing unit, thereby helping the user to breathe comfortably while wearing the mask.

[0008] However, most masks currently available on the market have the following structure: an air intake is formed on the front of the mask, and an air outlet is formed on the back of the mask, specifically on the back near the user's mouth or nose. Here, the front of the mask refers to the part exposed to the outside, while the back of the mask refers to the part that fits snugly against the user's face.

[0009] In detail, the air intake port formed on the mask is usually formed in the front of the mask near the center or near the two sides. In the above-mentioned prior art, the air intake port is formed in the front of the mask near the two sides.

[0010] In the structure described above, where the air intake is formed on the front of the mask and the air exhaust is formed on the back, external air flows into the inside of the mask and is then expelled to the user's respiratory organs through the air exhaust after passing through the fan and filter. In this process, there is a problem of excessive airflow conversion.

[0011] As the number of airflow transitions increases, flow resistance increases, resulting in a higher fan load. Furthermore, as the fan load increases, the power consumption of the battery supplying the fan also increases.

[0012] Furthermore, as the number of airflow transitions increases, the problem of increased flow noise arises.

[0013] In addition, users who wear masks with the air intake on the front of the mask often place the mask with the air intake facing upwards or forwards after removing it. Therefore, there is a relatively high possibility that dust will enter through the air intake.

[0014] Additionally, if the air intake is located on the front of the mask, it may give an unattractive impression when worn.

[0015] In addition, when users walk or run while wearing a mask, foreign objects or flies suspended in front of them may flow directly into their inhalation, which has the disadvantage of shortening the lifespan of the filter and the replacement cycle of the filter.

[0016] In addition, an intake cover is installed to prevent the air intake from being directly exposed to the outside. In this case, the intake cover may be separated from or damaged by external force or impact.

[0017] Furthermore, in structures where the inhalation port is not formed on the mask body but in other parts, such as in a separate air purification module that can be detachably or foldably attached to the side of the mask body, there is a disadvantage that the flow resistance increases significantly as the air drawn into the air purification module reaches the outlet formed in the center of the mask body. Summary of the Invention

[0018] This invention is proposed to overcome the above-mentioned shortcomings.

[0019] A mask device according to an embodiment of the present invention for achieving the objectives described above includes: a mask body including a front body and a rear body, the rear body being coupled to the back side of the front body, and a pair of receiving portions protruding forward from the rear body; a face shield being coupled to the back side of the rear body and fitting snugly against the user's face, with a breathing space formed inside the face shield; a fan module disposed in the receiving portions; a flow guide disposed on the back side of the fan module, forming a portion of an outlet communicating with the breathing space; a filter disposed in the flow guide; and a filter housing rotatably connected to the rear body, covering the filter, wherein each pair of receiving portions includes: a fastening surface extending forward from a side end of the rear body, with a filter hook protruding from the back side of the fastening surface; a mounting surface extending from the end of the fastening surface toward the center of the rear body, with the fan module mounted on the back side of the mounting surface; and an air guiding surface connected to the end of the mounting surface. The filter housing comprises: a front surface of the rear body; a top surface connecting the upper end of the fastening surface, the mounting surface, and the air guiding surface to the front surface of the rear body; and a bottom surface connecting the lower end of the fastening surface, the mounting surface, and the air guiding surface to the front surface of the rear body. The filter housing includes: a pair of filter frames extending parallel to each other in an opposing state; a filter cover connecting the back surfaces of the pair of filter frames; a hinge extending from the edge of each of the pair of filter frames; and a fastening hook extending from a side end of the filter housing opposite to the side end where the hinge is formed, engaging with the filter hook. The fastening hook includes: an extension extending from the front surface of the filter cover; and an engagement portion formed at the end of the extension. The engagement portion includes: an engagement surface inclined towards the outer edge of the filter housing; a sliding surface curved from the end of the engagement surface and extending in a straight line; and a contact surface formed from the end of the sliding surface with a predetermined curvature.

[0020] The sliding surface bends away from the outer edge of the filter housing, and the contact surface bends in the same direction as the sliding surface bends from the end of the engaging surface.

[0021] The filter frame supports the sides of the filter, the filter cover covers the rear end of the filter frame, and the fastening hooks extend from the front of the filter cover.

[0022] The filter cover includes: a cover body having an intake port for drawing in outside air; and an extension extending in an arc from an end of the cover body, the extension of which the fastening hook extends from the extension of the filter cover.

[0023] A hinge hole in the shape of an elongated hole is formed on the edge of each of the top surface and the bottom surface adjacent to the air guide surface for the hinge to be inserted. The hinge hole extends a predetermined length from the air guide surface to the fastening surface side. One end of the hinge hole is formed to be closer to the front end of the top surface and the bottom surface than the rear end of the top surface and the bottom surface, and the other end of the hinge hole is formed to be closer to the rear end of the top surface and the bottom surface than the front end of the top surface and the bottom surface.

[0024] With the filter housing closed, the hinge is engaged with one end of the hinge hole. When the fastening hook is disengaged from the filter hook and the filter housing is opened, the hinge can move toward a position closer to the other end of the hinge hole.

[0025] If the filter housing is closed with the hinge connected to the other end of the hinge hole, the contact surface of the fastening hook contacts the tip of the filter hook.

[0026] If a pressing force is applied to the filter housing while the contact surface of the fastening hook is in contact with the tip of the filter hook, the tip of the filter hook moves relative to the contact surface and the sliding surface as the hinge moves toward one end of the hinge hole.

[0027] If the filter housing is fully closed, the engaging surface contacts the inner side of the filter hook, and the hinge connects to one end of the hinge hole.

[0028] The direction in which the engaging surface bends from the end of the extension of the fastening hook is opposite to the direction in which the sliding surface bends from the end of the engaging surface and the direction in which the contact surface is formed in an arc from the end of the sliding surface.

[0029] The mask device according to the embodiments of the present invention having the structure described above has the following effects.

[0030] First, the inlet and outlet of the mask device are both formed on the back of the mask body that covers the user's face. Therefore, compared with the case where the inlet of the mask device is formed on the front of the mask body or other parts other than the mask body, it has a significant effect of reducing flow resistance.

[0031] Secondly, since the inhalation port is not exposed to the outside when the user is wearing the mask device, it has the advantage of not requiring an additional cover component to cover the inhalation port. Moreover, since no additional cover component needs to be installed on the front of the mask device, it has the effect of preventing the cover component from being damaged or separated due to external force.

[0032] Third, since the inlet is located on the back of the mask body, it has the advantage of minimizing the flow of dust or other foreign objects into the mask body through the inlet when the mask body is removed so that the front of the mask body is facing forward or upward.

[0033] Fourth, since the inhalation port is formed on the back of the mask body, the front of the mask device is neatly finished, which also has the additional effect of increasing the buyer's desire to purchase.

[0034] Fifth, it has the effect of preventing the hooks protruding from the end of the filter housing from being damaged by the force of the user pressing them when re-attaching after separating one end of the filter housing.

[0035] Sixth, by extending the waterproof sleeve forward from the edge of the strap hole that forms the strap connection, and installing a sealing cap on the inside of the waterproof sleeve, it has the advantage of being able to prevent sweat or moisture flowing in through the strap hole from flowing into the interior of the mask body.

[0036] Seventh, by installing a sealing cap at the end of the exhaust flow path guide, it is effective in preventing moisture from seeping through the gap between the exhaust flow path guide and the back of the front body.

[0037] Eighth, by forming a bending prevention wall in the indicator body that constitutes the indicator module, the indicator body is prevented from bending due to the pressure applied to the power button.

[0038] Ninth, by making the bend prevent the protrusion from sticking out of the fixed plate of the flow guide, it has the effect of improving the noise caused by the interference between the fan blades and the fixed plate or the possibility of PCB damage to the fan module. Attached Figure Description

[0039] Figure 1 This is a front perspective view of the mask device according to an embodiment of the present invention.

[0040] Figure 2 This is a perspective view of the rear of the mask device.

[0041] Figure 3 This is an exploded perspective view of the mask device.

[0042] Figure 4 This is a cross-sectional view of the mask device showing the airflow inside the mask device.

[0043] Figure 5 This is a longitudinal sectional view of a mask assembly showing the airflow inside the assembly.

[0044] Figure 6 This is a front perspective view of the rear main body of the mask device constituting an embodiment of the present invention.

[0045] Figure 7 This is an enlarged cross-sectional view showing the waterproof sleeve structure of the sealing cap of the mask device according to an embodiment of the present invention.

[0046] Figure 8 This is a front perspective view of the sealing cap inserted into the front end of the flow path guide.

[0047] Figure 9 This is a perspective view of the back of the sealing cap.

[0048] Figure 10 This is an exploded perspective view showing the combination relationship between the power module and the indicator module of the mask device according to an embodiment of the present invention.

[0049] Figure 11 This is a front perspective view of the indicator body that constitutes the indicator module in an embodiment of the present invention.

[0050] Figure 12 This is a bottom view of the indicator body.

[0051] Figure 13 This is a perspective view of the back of the indicator body.

[0052] Figure 14 This is an enlarged perspective view of the rear of the main body after the filter housing and filter have been removed.

[0053] Figure 15 This is an enlarged perspective view of the rear of the main body after the flow guide has been removed.

[0054] Figure 16 This is a frontal perspective view of the flow guide.

[0055] Figure 17 This is a cross-sectional perspective view of the filter housing according to an embodiment of the present invention.

[0056] Figures 18 to 22 This is a cross-sectional view showing the closing process of the filter housing according to an embodiment of the present invention.

[0057] Figure 23 This is a cross-sectional perspective view of the filter housing according to another embodiment of the present invention.

[0058] Figures 24 to 28 This is a cross-sectional view showing the closing process of the filter housing according to another embodiment of the present invention. Detailed Implementation

[0059] Hereinafter, the mask device of the present invention will be described in detail with reference to the accompanying drawings.

[0060] Figure 1This is a front perspective view of the mask device according to an embodiment of the present invention. Figure 2 This is a perspective view of the rear of the mask device. Figure 3 This is an exploded perspective view of the mask device. Figure 4 This is a cross-sectional view of the mask device showing the airflow inside the device. Figure 5 This is a longitudinal sectional view of a mask assembly showing the airflow inside the assembly.

[0061] Reference Figures 1 to 5 The mask device 10 of this embodiment includes: a mask body 11; a face guard 14 attached to the back of the mask body 11 in a fixed or detachable manner; and an air purification module 30 installed inside the mask body 11.

[0062] In detail, the mask body 11 includes: a front body 12, forming the front shape; and a rear body 13, which is attached to the back of the front body 12, forming the back shape. The front of the front body 12 forms the front of the mask device 10, and the back of the rear body 13 faces the face of the user (or wearer).

[0063] Additionally, the face shield 14 is attached to the back of the rear body 13 and fits snugly against the user's face; it can be molded from a stretchable silicone or rubber material. A breathing space is formed on the inner side of the face shield 14, which accommodates the user's nose and mouth when the user wears the mask device 10. Therefore, purified outside air passing through the air purification module 30 is guided into the breathing space and inhaled by the user, and air exhaled by the user is also expelled into the breathing space.

[0064] A predetermined space is formed between the front body 12 and the rear body 13, such as... Figure 4 and Figure 5 As shown, various electrical components are mounted on the front of the rear body 13. Furthermore, these electrical components are concealed by the front body 12 and are not exposed to the outside.

[0065] Additionally, the air purification module 30 includes: a fan module 31, and a receiving portion 133 (see reference) formed on the rear main body 13. Figure 6 The fan module 31 includes a centrifugal fan that draws in air axially and discharges it radially. The fan module 31 also includes a filter 33 located behind the fan module 31.

[0066] The air purification module 30 also includes a filter housing 34 located behind the filter 33, with an intake port 343 formed therein for drawing in outside air. The filter housing 34 can be rotatably attached to the rear body 13, as shown in the figure, and the intake port 343 can be a collection of a plurality of holes with different diameters.

[0067] Furthermore, an outlet 101 is formed at a position spaced apart from the intake port 343 toward the center of the rear body 13. With the operation of the fan module 31, external air drawn in through the intake port or intake grille 343 passes sequentially through the filter 33 and the fan module 31, and is then discharged into the breathing space through the outlet 101.

[0068] The inhalation port, i.e., the inhalation grille 343, is located on the outside of the face mask 14, and the exhalation port 101 is located on the inside of the face mask 14. That is, the inhalation grille 343 is located on the outside of the breathing space, and the exhalation port 101 is located on the inside of the breathing space, so that the inhaled outside air and the air exhaled by the user will not mix with each other.

[0069] On the other hand, the air purification module 30 also includes a flow guide 32 disposed behind the fan module 31.

[0070] In addition, the mask device 10 also includes at least one of the following: main control module 15, power module 16, indicator module 18, wireless communication module 17, speaker module 19, battery 20, and exhaust valve 21.

[0071] In detail, the main control module 15 is a module used to control the operation of the fan module 31, the speaker module 19, the pressure sensor (not shown), the microphone (not shown), etc. The main control module 15 can be configured in the upper part of the front center of the rear body 13.

[0072] The power module 16 is a control module for supplying power to the electrical components installed on the mask device 10. The power module 16 can be configured on the lower right side of the front of the rear body 13.

[0073] The power module 16 may be equipped with a terminal connector and an LED module, etc. The terminals of the cables used for power supply and data transmission are inserted into the terminal connector, and the LED module is used to indicate the operating status of the mask device 10. In addition, the light irradiated from the LED module can be diffused and guided by the indicator module 18 to illuminate the outside of the mask device 10.

[0074] The wireless communication module 17 can be any of various short-range wireless communication modules, including Bluetooth. The wireless communication module 17 can be disposed on the lower left side of the front of the rear body 13. For example, the wireless communication module 17 can be horizontally mounted on the front of the rear body 13 in a direction intersecting with it. The wireless communication module 17 can be horizontally mounted on the front of the rear body 13 by means of a pair of substrate insertion ribs 1315 protruding from the front of the rear body 13. The two ends of the wireless communication module 17 are supported by the pair of substrate insertion ribs 1315.

[0075] The speaker module 19 can be configured on the lower left side of the front of the rear body 13, which is located below the wireless communication module 17.

[0076] The battery 20 can be disposed at the center of the front of the rear body 13, and the exhaust valve 21 can be configured to cover the exhaust port formed on the lower side of the center of the front of the rear body 13. That is, when the user exhales, the exhaust valve 21 can open the exhaust port, and when the user inhales, the exhaust valve 21 can cover the exhaust port. The exhaust valve 21 can be provided in the form of a flexible and flat flap.

[0077] It should be noted that the front, back, left, and right sides of the mask body 11 are defined based on the state of the user wearing the mask device 10.

[0078] On the other hand, such as Figure 4 and Figure 5 As shown, if the user presses the power button to operate the fan module 31, outside air flows into the interior of the mask device 10 through the inhalation ports 343 formed on the left and right sides of the back of the mask device 10.

[0079] Outside air flowing in through the intake 343 is purified as it passes through the filter 33. Furthermore, the air that has passed through the filter 33 is drawn in axially along the fan module 31 and then expelled radially.

[0080] Furthermore, the air ejected radially from the fan module 31 passes through the side of the flow guide 32 and the air guide surface 1334 of the receiving portion 133 (see reference). Figure 6 The air passage 102 formed is guided to the outlet 101. In addition, the air is supplied via the outlet 101 to the breathing space defined inside the face shield 14.

[0081] On the other hand, the air exhaled by the user through the mouth and nose will gather in the breathing space. Furthermore, the air gathered in the breathing space descends and is discharged to the outside through the front exhaust port 1361 and the bottom exhaust port 1362. Here, under the pressure of the air generated during the user's exhalation, the exhaust valve 20 bends forward, causing the front exhaust port 1361 to open. Furthermore, when the user inhales, the pressure inside the breathing space is lower than atmospheric pressure, causing the exhaust valve 20 to return to its original position and block the front exhaust port 1361.

[0082] Strap connecting portions 137 are formed at the left and right ends of the rear body 13. Specifically, the strap connecting portion 137 is a portion for connecting the end of a strap or band that hangs around the user's ears or around the back of the user's head. The strap connecting portions 137 may be formed at the upper and lower parts of the left end and the upper and lower parts of the right end of the rear body 13.

[0083] Both ends of one of the pair of straps can be connected to the strap connecting portions 137 located at the upper and lower left sides, respectively, while both ends of the other strap can be connected to the strap connecting portions 137 located at the upper and lower right sides, respectively. In this way, the pair of straps can be hung on the user's ears.

[0084] Alternatively, the two ends of one of the straps can be connected to the strap connecting portions 137 located at the upper left and upper right ends, respectively, while the two ends of the other strap can be connected to the strap connecting portions 137 located at the lower left and lower right ends, respectively. In this way, the pair of straps can wrap around the back of the user's head.

[0085] Each of the four strap connection portions 137 includes: a strap groove 1373 recessed from the front of the rear body 13 and extending in the lateral direction (width direction of the rear body); a strap hole 1374 formed at any position of the strap groove 1373; a strap rod 1372 connecting the top and bottom surfaces of the strap groove 1373; and a cylindrical waterproof sleeve 1371 (see reference). Figure 6 The strap extends from the back of the rear body 13 at a location corresponding to the edge of the strap hole 1374. Furthermore, the strap hook is rotatably attached to the strap bar 1372.

[0086] Figure 6 This is a front perspective view of the rear main body of the mask device constituting an embodiment of the present invention.

[0087] Reference Figure 6The rear body 13 of the mask device 10 constituting the embodiment of the present invention includes: a face cover portion 131 that covers the user's face; a welding portion 132 that bends forward from the edge of the face cover portion 131; and a pair of receiving portions 133 that protrude forward from the front of the face cover portion 131 and receive the air purification module 30.

[0088] In detail, the welded portion 132 is continuously formed along the top edge, two side edges, and bottom edge of the cover portion 131. Furthermore, the welded portion 132, which bends along the bottom edge of the cover portion 13 and extends forward, has the largest width in the front-to-back direction.

[0089] The portion of the welded portion 132 formed at the bottom edge of the cover portion 131 can be specifically defined as an extension platform 1320. The extension platform 1320 is convex in shape, and its width in the front-to-back direction increases as it moves closer to the center from both ends of the rear body 13.

[0090] A bottom vent 1362 may be formed at the center of the welding portion 132, which is defined as an extension platform, and a button hole 1321 may be formed at a position spaced apart from the bottom vent 1362 towards the side end of the rear body 13. A power button is inserted into the button hole 1321. A pair of indicator holes 1322 with smaller diameters are formed on the left and right edges of the button hole 1321, respectively.

[0091] Light emitted from the light-emitting unit mounted on the power module 16 is projected to the outside through a pair of indicator holes 1322. The light-emitting unit includes an LED module.

[0092] If light shines to the outside through either of the pair of indicator holes 1322, it indicates that the power supply to the mask device 10 is on. Furthermore, the remaining power of the battery 20 can be predicted based on the color of the light shining through the other of the pair of indicator holes 1322.

[0093] A terminal insertion port 1323 is formed at a position further away from the button hole 1321 and spaced towards the side end of the rear body 13. A USB (Universal Serial Bus) cable can pass through the terminal insertion port 1323 and be inserted into the terminal connector 162 (see reference) formed on the power module 16. Figure 10 The battery 20 can be charged via the USB cable, and the version or function of the mask device 10 can be updated or upgraded based on data transmitted via the USB cable.

[0094] A pair of receiving portions 133 are respectively formed on the left and right sides of the center of the rear body 13, and are symmetrical about a vertical line passing through the center of the rear body 13.

[0095] The receiving portions 133 protrude forward from the front of the cover portion 131, thereby forming a space for accommodating the air purification module 30. The receiving portion 133 includes: a mounting surface 1331, on which the air purification module 30, specifically the fan module 31, is mounted; a fastening surface 1335, connected to the outer edge of the mounting surface 1331 at the side end of the cover portion 131; and an air guiding surface 1334, connected to the front of the cover portion 131 at the inner edge of the mounting surface 1331. The air guiding surface 1334 forms the front of the air passage 101.

[0096] In addition, the receiving portion 133 also includes a top surface 1332 that connects the upper ends of the mounting surface 1331, the air guiding surface 1334 and the fastening surface 1335 to the front surface of the cover portion 131.

[0097] In addition, the receiving portion 133 also includes a bottom surface 1333 that connects the lower ends of the mounting surface 1331, the air guiding surface 1334 and the fastening surface 1335 to the front surface of the cover portion 131.

[0098] One or more fastening units are formed on the fastening surface 1335. For example, fastening hooks 1338 and 1339 are formed (see reference). Figure 14 , 18 ).

[0099] A fan mounting hole 1336 is formed on the mounting surface 1331, and the top surface 1332 and the bottom surface 1334 can extend horizontally and can extend parallel to each other.

[0100] The fastening surface 1335 may protrude in an arc toward the outer side of the rear body 13, and may be formed to be more inclined from the cover portion 131 toward the mounting surface 1331.

[0101] The air guiding surface 1334 can be designed to extend in an arc from the mounting surface 1331 toward the cover portion 131, so that the air drawn in by the fan module 31 is smoothly guided along the air guiding surface 1334 to the discharge port 101 side.

[0102] The receiving portion 133 includes: a left receiving portion formed on the left side of the center of the rear body 13; and a right receiving portion formed on the right side of the center of the rear body 13. The left receiving portion and the right receiving portion are separated from the center of the rear body 13 by a predetermined interval, and the battery 20 is installed in the space between the left receiving portion and the right receiving portion.

[0103] A battery mounting portion 138 may be formed on the front side of the rear body 13. One end of the battery mounting portion 138 extends from either the left air guide surface 1334 or the right air guide surface 1334, while the other end is connected to the other side of the left air guide surface 1334 or the right air guide surface 1334.

[0104] The battery mounting portion 138 is configured in an "n" shape, supporting the front and both sides of the battery 20. Therefore, the battery mounting portion 138 can be used to prevent the battery 20 from separating from the rear body 13.

[0105] In addition, the center portion of the battery mounting portion 138 protrudes further forward to allow for the selective mounting of batteries of different sizes.

[0106] On the other hand, if the user sweats while wearing the mask device 10, the sweat may flow into the strap holes 1374 along the straps. Furthermore, even when not wearing the mask device 10, dust or other foreign objects may enter the strap holes 1374.

[0107] Furthermore, moisture flowing in through the strap hole 1374 may corrode the electrical components mounted on the front of the rear body 13, and there is a risk of sparks being generated around the electrical components due to dust entering.

[0108] To address this issue, a waterproof sleeve 1371 is formed on the front side of the rear body 13. The waterproof sleeve 1371 extends forward from the front side of the rear body 13 along the edge of the strap hole 1374 for a predetermined length.

[0109] Furthermore, a sealing cap 100 is inserted inside the waterproof sleeve 1371, thereby preventing moisture and foreign matter flowing in through the strap hole 1374 from entering the space between the front body 12 and the rear body 13. The structure of the waterproof sleeve 1371 and the sealing cap 100 will be described in detail later with reference to the accompanying drawings.

[0110] On the other hand, an exhaust flow path guide 136 protrudes forward from the portion on the front of the cover portion 131 corresponding to the lower side of the battery mounting portion 138. Furthermore, a sealing cap 60 is installed at the front end of the exhaust flow path guide 136; the sealing cap 60 will be described in detail later with reference to the accompanying drawings.

[0111] In detail, the exhaust flow guide 136 is formed on the lower side of the battery mounting portion 138, such that the lower end of the battery 20 mounted in the battery mounting portion 138 is supported by the top surface of the exhaust flow guide 136. As a result, it is possible to prevent the battery 20 from falling downwards due to gravity when it is inserted into the battery mounting portion 138.

[0112] The exhaust flow path guide 136 can form a longitudinal section that is generally in the shape of a tunnel, and a front exhaust port 1361 can be formed in the part of the cover portion 131 corresponding to the inner side of the exhaust flow path guide 136.

[0113] At least one of the front exhaust port 1361 and the bottom exhaust port 1362 can be configured as an exhaust grille shape, divided into a plurality of small exhaust ports by a plurality of grilles or partition ribs. Furthermore, the front exhaust port 1361 is selectively opened and closed by the exhaust valve 21.

[0114] Figure 7 This is an enlarged cross-sectional view showing the waterproof sleeve structure of the sealing cap of the mask device according to an embodiment of the present invention.

[0115] Reference Figure 7 The waterproof sleeve 1371 extends in length spaced apart from the back of the front body 12.

[0116] In detail, the waterproof sleeve 1371 may also extend to a length that contacts the back side of the front body 12 to prevent moisture and foreign matter from entering between the front body 12 and the rear body 13. However, when the rear body 13 and the front body 12 are joined, there is a high possibility that the end of the waterproof sleeve 1371 may not be completely flush with the back side of the front body 12 due to assembly tolerances.

[0117] Alternatively, the end of the waterproof sleeve 1371 can be heat-fused to the back of the front body 12. However, during the heat-fusion process, there is a risk that the waterproof sleeve 1371 may melt or the shape of the front body 12 may be deformed. Moreover, the heat-fused portion of the end of the waterproof sleeve 1371 may be exposed on the front of the mask device 10, resulting in poor aesthetics.

[0118] To solve this problem, the sealing cap 100, which has the same cross-sectional structure as the waterproof sleeve 1371 but has a shorter length than the waterproof sleeve 1371, can be inserted into the interior of the waterproof sleeve 1371.

[0119] The sealing cap 100 may be made of a material capable of elastic deformation, such as silicone or rubber. The sealing cap 100 includes: a cap body 1001, inserted into the interior of the waterproof sleeve 1371; and a cap cover 1002 formed at the upper end of the cap body 1001. The width of the cap cover 1002 is greater than the width of the cap body 1001, such that the cap cover 1002 engages with the end of the waterproof sleeve 1371, thereby allowing the insertion limit of the sealing cap 100 to be determined.

[0120] As another method, the sealing cap 100 can be configured to have the same shape as the internal shape of the waterproof sleeve 1371, and a stop protrusion 1375 can protrude from the inner circumferential surface of the waterproof sleeve 1371. The insertion limit of the sealing cap 100 can be determined by the stop protrusion 1375.

[0121] Furthermore, the cross-sectional size of the sealing cap 100 can be manufactured to be slightly larger than the cross-sectional size of the waterproof sleeve 1371, so that when it is pushed into the waterproof sleeve 1371, the surface of the sealing cap 100 is in strong contact with the inner circumferential surface of the waterproof sleeve 1371, thereby maximizing the sealing effect.

[0122] As another method, the waterproof sleeve 1371 can extend forward from the edge of the strap hole 1374 and extend obliquely in an increasing cross-sectional area. Therefore, when the sealing cap 100 is inserted into the waterproof sleeve 1372, the deeper the insertion depth of the sealing cap 100, the greater the compression of the sealing cap 100, thereby determining the insertion limit of the sealing cap 100.

[0123] Figure 8 This is a front perspective view of the sealing cap inserted into the front end of the flow path guide. Figure 9 This is a perspective view of the back of the sealing cap.

[0124] Reference Figure 8 and Figure 9 It is designed such that, if the front body 12 is combined with the rear body 13, the front end of the exhaust flow path guide 136 is in close contact with the back of the front body 12.

[0125] However, due to assembly tolerances or tolerances caused by shrinkage after injection molding, the front end of the exhaust flow guide 136 may separate from the back of the front body 12, forming a gap. Furthermore, during movement while wearing the mask device 10 in the rain or during strenuous exercise, moisture or saliva may flow between the front body 12 and the rear body 13 through the gap.

[0126] To prevent this, the front end of the exhaust flow guide 136 can be heat-fused to the back of the front body 12, similar to the waterproof sleeve 1371. However, this may cause the same problem that occurs when the waterproof sleeve 1371 is heat-fused.

[0127] To address this issue, a sealing cap 60 may be installed at the front end of the exhaust flow path guide 136.

[0128] In detail, the sealing cap 60 may be made of an elastic material such as silicone or rubber, just like the sealing cap 100.

[0129] The sealing cap 60 includes: a generally n-shaped cap frame 601 extending along the front end of the exhaust flow guide 136; an inner rib 604 extending rearward from the inner edge of the cap frame 601; an outer rib 603 extending rearward from the outer edge of the cap frame 601; and a connecting rib 602 connecting the left and right portions of the cap frame 601.

[0130] An insertion groove 605 is formed between the inner rib 604 and the outer rib 603. The insertion groove 605 has a width corresponding to the thickness of the exhaust flow path guide 136. The front end of the exhaust flow path guide 136 is inserted into the insertion groove 605.

[0131] In addition, by forming the connecting rib 602, the phenomenon of the two ends of the cover frame 601 opening can be prevented.

[0132] Furthermore, the lower ends of both sides of the sealing cover 60 are formed to a length that contacts the extension platform 1320 formed by the bottom edge of the cover portion 131. Therefore, when the front body 12 and the rear body 13 are joined, no gap will be formed between the lower ends of the sealing cover 60 and the extension platform 1320.

[0133] Figure 10 This is an exploded perspective view showing the combination relationship between the power module and the indicator module of the mask device according to an embodiment of the present invention.

[0134] Reference Figure 10The power module 16 installed on the mask device 10 is located at the lower right side of the front of the rear body 13, and the indicator module 18 is assembled and combined on the substrate of the power module 16.

[0135] In detail, the power module 16 includes a power board 161 and a plurality of electrical components mounted on the front side of the power board 161. The plurality of electrical components includes at least one of a terminal connection portion 162, a connector 163, a power switch 164, and LEDs 165 and 166.

[0136] The terminal connection part 162 serves as an interface, through which a USB cable is inserted to charge the battery 200, or through data transmitted via the USB cable to update or upgrade the version or function of the mask device 10.

[0137] The connector 163 serves to connect to the PCB of the main control module 15 and supply power to the main control module 15.

[0138] The power switch 164 is turned on or off by a power button 183 installed in the button hole 1321. The power switch 164 can be installed on the lower left side of the power supply board 161.

[0139] If the power switch 164 is turned on by the operation of the power button 183, power is supplied to the electrical components installed in the mask device 10; if the power button 183 is turned off, power is disconnected from the electrical components installed in the mask device 10.

[0140] The LEDs 165 and 166 emit light outwards to indicate the operating status of the mask device 10. The light emitted from the LEDs 165 and 166 can be diffused and guided by the indicator module 18 to illuminate the outside of the mask device 10. If the indicator module 18 is combined with the power supply board 161, the LEDs 165 and 166 are either shielded by the indicator module 18 or housed inside the indicator module 18.

[0141] The LEDs 165 and 166 are arranged on the left and right sides respectively, with the power switch 164 as the reference. The LEDs 165 and 166 include a first LED 165 spaced to the right of the power switch 164 and a second LED 166 spaced to the left.

[0142] Additionally, mounting holes 167 and 168 are formed on the power supply substrate 161 for mounting the indicator module 18. The mounting holes 167 and 168 are for a portion of the indicator module 18 to be engaged with the module by means of a snap hook.

[0143] The mounting holes 167 and 168 are respectively spaced apart on the left and right sides with the power switch 164 as a reference. The mounting holes 167 and 168 include: a first mounting hole 167, spaced apart to the right of the power switch 164; and a second mounting hole 168, spaced apart to the left of the power switch 164. The first mounting hole 167 is spaced apart to the upper side of the first LED 165, and the second mounting hole 168 is spaced apart to the upper side of the second LED 166.

[0144] The indicator module 18 is mounted on the power supply board 161 and serves to concentrate the light from the LEDs 165 and 166 and diffuse and guide it to the outside of the mask device 10.

[0145] The indicator module 18 includes: an indicator body 181; a button sealing part 182, which is inserted into the inner side of the bottom surface of the indicator body 181; a power button 183, which is inserted into the inner side of the button sealing part 182; and a light guide part 184, which is inserted into the interior of the indicator body 18.

[0146] The button sealing portion 182 includes a sealing portion body 1821, with an insertion space formed on its inner side for inserting the power button 183. When the power button 183 is inserted into the inner side of the sealing portion body 1821, the sealing portion body 1821 is mounted onto a button mounting groove 1813 formed on the bottom surface of the button mounting portion 1812 (see reference). Figure 11 The sealing body 1821 can be configured to surround the inner side of the button mounting groove 1813. The sealing body 1821 can be formed of rubber or silicone.

[0147] The insertion space of the sealing part body 1821 can be formed by recessing upward from the bottom surface of the sealing part body 1821. When the button sealing part 182 is inserted into the button mounting groove 1813, the bottom surface of the sealing part body 1821 can form a smooth single surface with the bottom surface of the button mounting part 1812, without forming a step.

[0148] The sealing body 1821 serves to prevent moisture or foreign matter flowing into the space between the power button 183 and the button hole 1321 of the rear body 13 from flowing into the power substrate 161. For this purpose, the sealing body 1821 can be arranged facing the button hole 1321, and its cross-sectional area can be larger than that of the button hole 1321. Therefore, the plurality of electrical components mounted on the power substrate 161 are waterproofed and thus protected from external influences.

[0149] Additionally, a through protrusion 1822 is formed on the top surface of the sealing body 1821, through which a portion of the power button 183 passes. An opening for the power button 183 to pass through is formed inside the through protrusion 1822, and the through protrusion 1822 can protrude upward from the center of the top surface of the sealing body 1821.

[0150] The through-post 1822 is disposed opposite to the power switch 164. Therefore, if the power button 183 is pressed, a portion of the power button 183 can pass through the through-post 1822 and contact the power switch 164. The power switch 164 includes a tactile switch.

[0151] The power button 183 can be understood as a configuration in which the power switch 164 is activated by being pressed by the user. The power button 183 can be inserted into the inside of the button sealing part 182, pass through the button hole 1321 and protrude to the outside of the mask device 10.

[0152] According to one embodiment, the power button 183 can be resiliently configured to move a predetermined distance vertically between the button seal 182 and the rear body 13. For this purpose, a resilient member can be disposed between the power button 183 and the button seal 182. The resilient member may include a spring.

[0153] The power button 183 may include: a button body 1831, which is mounted on the button sealing part 182 and pressed by the user; and a button protrusion 1832, which protrudes from the top surface of the button body 1831 and contacts the power switch 164.

[0154] The button protrusion 1832 can protrude upward from the center of the top surface of the button body 1831. The button protrusion 1832 can be configured to face the through protrusion 1822. Therefore, if the button body 1831 is pressed by an external force, the button protrusion 1832 will pass through the through protrusion 1822 and press the power switch 164.

[0155] The light guide portion 184 is housed inside the indicator body 181, serving to guide the light emitted from the LEDs 165 and 166 to the indicator hole 1322 to prevent its diffusion. The light guide portions 184 are formed in pairs and are respectively housed inside a pair of reflectors 1815. The light guide portion 184 is mounted on the top surface of the base 1811, and a portion thereof can be inserted into the light guide hole 1814.

[0156] In detail, the light guide portion 184 may include: a tube portion 1841, which is formed in the shape of a tube and inserted into the indicator hole 1322; an extension tube 1842, which extends from the upper end of the tube portion 1841 in an expanded manner; and a fixing portion 1843, which is formed at the upper end of the extension tube 1842 and fixed to the top surface of the base 1811.

[0157] The center of the tube 1841 may coincide with the center of the indicator hole 1322. The extension tube 1842 may have an outer diameter with an area corresponding to the inner diameter of the light guide hole 1814, and may be inserted into the upper end of the light guide hole 1814. When fixed to the top surface of the base 1811, the fixing part 1843 may be arranged facing the LEDs 165 and 166. At this time, an opening communicating with the extension tube 1842 is formed in the fixing part 1843.

[0158] Therefore, the light emitted from the LEDs 165 and 166 is focused by the reflector 1815 and guided into the interior of the light guide 184. Furthermore, the light passing through the light guide 184 diffuses outwards through the indicator hole 1322.

[0159] Figure 11 This is a front perspective view of the indicator body constituting the indicator module of this invention. Figure 12 This is a bottom view of the indicator body. Figure 13 This is a perspective view of the back of the indicator body.

[0160] Reference Figures 11 to 13 The indicator body 181 constituting the indicator module 18 of this embodiment may include: a base 1811; a button mounting portion 1812 extending downward from the bottom surface of the base 1811; a pair of reflectors 1815 extending upward from both sides of the top surface of the base 1811; and a bending prevention wall 1819 connecting the pair of reflectors 1815. Additionally, the indicator body 181 may also include engaging portions 1816 and 1817 respectively formed on the top surfaces of the pair of reflectors 1815.

[0161] The base 1811 is formed in a shape that extends relatively long in the left-right direction. The center of the base 1811 can be aligned with the center of the power switch 164. A button through hole 1818 is formed at the center of the top surface of the base 1811 for the power button 183 to pass through. If the power button 183 is pressed, the power button 183 will pass through the button through hole 1818 and press the power switch 164.

[0162] The button mounting portion 1812 is formed on the bottom surface of the base 1811, extending longitudinally in the left-right direction. The center of the button mounting portion 1812 can be aligned with the center of the base 1811. A button mounting groove 1813 for inserting the power button 183 is formed at the center of the button mounting portion 1812. The button mounting groove 1813 is recessed upwards from the bottom surface of the button mounting portion 1812. The button mounting groove 1813 connects to the button through hole 1818.

[0163] Furthermore, a light guide hole 1814 for inserting the light guide portion 184 is formed on the bottom surface of the button mounting portion 1812. The light guide hole 1814 can be formed by extending upwards through the bottom surface of the button mounting portion 1812. At this time, the light guide hole 1814 can extend from the bottom surface of the button mounting portion 1812 to the top surface of the base 1811.

[0164] The light guide holes 1814 are formed apart from each other on both sides of the button mounting groove 1813. A pair of light guide holes 1814 can face and connect with a pair of indicator holes 1322.

[0165] The reflector 1815 forms a receiving space to accommodate the LEDs 165 and 166, and functions to concentrate the light emitted from the LEDs 165 and 166. The reflectors 1815 are formed separately from the top surface of the base 1811, with the button through hole 1818 as the reference.

[0166] The reflectors 1815 extend upwards from both sides of the top surface of the base 1811, and may have a shape where the front, two sides, and top surface are closed while the back surface is open. Furthermore, when the indicator module 18 is combined with the power supply substrate 161, the LEDs 165 and 166 mounted on the power supply substrate 161 are accommodated within the internal space of the reflector 1815. The accommodating space of the reflector 1815 is connected to the light guide hole 1814.

[0167] The engaging portions 1816 and 1817 are formed on the reflector 1815 and engage with the mounting holes 167 and 168. The engaging portions 1816 and 1817 include: an extension 1816 extending from the top surface of the reflector 1815; and a hook portion 1817 formed at the end of the extension 1816.

[0168] The extension 1816 extends rearward from the top surface of the reflector 1815, and a hook portion 1817 may be provided at its end. A pair of hook portions 1817 are fastened to a pair of mounting holes 167 and 168 respectively in a hook manner, so that the indicator module 18 can be stably fixed to the power board 161 without shaking.

[0169] With the indicator module 18 assembled in the mask device, if the user presses the power button 183 against the power switch 164, the center of the base 1811 will bend and bulge upwards in an arc under the force of pressing the power button 183. Furthermore, as the base 1811 bends, the pair of reflectors 1815 will open or bend away from each other. This phenomenon causes excessive force to be transmitted to the power switch 164, potentially leading to its breakage.

[0170] To solve this problem, the pair of reflectors 1815 are connected by the bend-prevention wall 1819. The bend-prevention wall 1819 connects the inner edges of the front faces of the pair of reflectors 1815. Furthermore, a step portion 1819a can be formed at the location where the lower end of the bend-prevention wall 1819 meets the top surface of the base 1811.

[0171] Under the action of the bending prevention wall 1819 and the step portion 1819a, even if excessive force is applied to the power button 183, the base 1811 will not bend. Therefore, it is possible to prevent the components mounted on the power board 161 from being damaged, or the alignment of the light guide portion 18 and the indicator hole from being disrupted.

[0172] Figure 14 This is an enlarged perspective view of the rear of the main body after the filter housing and filter have been removed. Figure 15 This is an enlarged perspective view of the rear of the main body after the flow guides have been removed. Figure 16 This is a frontal perspective view of the flow guide.

[0173] Reference Figures 14 to 16 As described above, the receiving portion 133 accommodating the air purification module 30 includes: a mounting surface 1331, on which the air purification module 30, specifically the fan module 31, is mounted; a fastening surface 1335, connected to the outer edge of the mounting surface 1331 at the side end of the cover portion 131; and an air guiding surface 1334, connected to the front surface of the cover portion 131 at the inner edge of the mounting surface 1331. The air guiding surface 1334 forms the front surface of the air passage 101.

[0174] Flow guide hook 1339 (reference) Figure 18 The filter hook 1338 and the flow guide hook 1339 are formed separately on the fastening surface 1335 in the front-to-back direction. The flow guide hook 1339 is located closer to the mounting surface 1331 than the filter hook 1338.

[0175] Furthermore, a locking groove 1337 is formed on the back side end of the rear body 13, which corresponds to the rear of the filter hook 1338.

[0176] In addition, the receiving portion 133 also includes a top surface 1332 that connects the upper ends of the mounting surface 1331, the air guiding surface 1334 and the fastening surface 1335 to the front surface of the cover portion 131.

[0177] In addition, the receiving portion 133 also includes a bottom surface 1333 that connects the lower ends of the mounting surface 1331, the air guiding surface 1334 and the fastening surface 1335 to the front surface of the cover portion 131.

[0178] In detail, an installation guide 1332a, a fixing guide 1332b, and a hinge hole 1332c are respectively formed on the top surface 1332 and the bottom surface 1333 of the receiving portion 133.

[0179] The mounting guide 1332a is provided as a rib extending a predetermined length from the back of the mask body 11 toward the front. The fixing guide 1332b is provided as a protrusion protruding from the mounting guide 1332a at a position spaced apart from the center of the mask body 11.

[0180] Additionally, the hinge hole 1332c is provided as an elongated hole formed at a position spaced apart from the mounting guide 1332a towards the side end of the mask body 11. The hinge hole 1332c is for the hinge 346 of the filter housing 34 (see reference). Figure 17 The insertion hole can be non-circular in shape; for example, it can be an elongated hole in the shape of an ellipse.

[0181] Furthermore, the hinge hole 1332c can extend obliquely in a direction that gets closer to the back of the mask body 11 as it moves towards the side end of the mask body 11. That is, when the hinge hole 1332c is designed to be elliptical, the distance from one end of the hinge hole 1332c near the center of the mask body 11 to the back of the mask body 11 can be designed to be greater than the distance from the other end of the hinge hole 1332c near the side end of the mask body 11 to the back of the mask body 11.

[0182] The reason for the hinge hole 1332c extending obliquely in the form of an elongated hole is to avoid interference between the filter housing 34 and the rear flange 325 of the flow guide 32 when the end of the filter housing 34 is rotated in order to separate the filter 33.

[0183] Specifically, the fastening hook 344 of the filter housing 34 (see reference) Figure 17 When the filter housing 34 is rotated while separated from the filter hook 1338 protruding from the fastening surface 1335, it is pulled towards the side end of the mask body 11 while being rotated. Thus, the hinge 346 of the filter housing 34 moves and rotates from one end of the elongated hinge hole 1332c to the other end, becoming as follows: Figure 18 The state shown.

[0184] According to the structure of the hinge hole 1332c of the present invention, the filter housing 34 does not interfere with the rear flange 325, and the amount of rotation (or opening angle) of the filter housing 34 is greater compared to the case where the hinge hole 1332c is formed in a circular shape. As a result, it has the advantage of being able to install and detach the filter 33 more easily.

[0185] On the other hand, the fan module 31 includes a fan housing 311 and a fan 312. Furthermore, the fan housing 311 includes: a base 3111 disposed on a mounting surface 1331 of the receiving portion 133; and a protective cover 3112 protruding from the edge of the base 3111 at a predetermined height. The protective cover 3112 surrounds the edge of the base 311, and its central portion extends arcuately along the outer contour of the fan 312.

[0186] The base is equipped with a PCB (Printed Circuit Board) F for driving a fan motor. The PCB includes a flexible PCB.

[0187] The shield 3112 first extends in a straight line from one side edge of one end of the base 3111, then extends in an arc along the outline of the fan 313 at a certain position with a prescribed curvature, and then extends in a straight line to the other side edge of one end of the base 3111.

[0188] A guide protrusion 3113 protrudes from the inner surface of one end of the shield 3112. Air rotates from the space between the guide protrusion 3113 and the fan 312 along the rotation direction of the fan and is discharged to the side end of the shield 3112 facing the guide protrusion 3113.

[0189] The portion where the guide protrusion 3113 is formed, i.e. the portion where the air rotation begins, can be defined as inlet a, and the portion where the air flowing out rotates along the shape of the shield 3112 can be defined as outlet b.

[0190] Air flowing from outlet b is supplied to the user's face through outlet 101.

[0191] On the other hand, with the fan module 31 installed in the receiving portion 133, the flow guide 32 is disposed on the back of the fan module 31. That is, the flow guide 32 is disposed at the rear end of the cover 3112.

[0192] The flow guide 32 includes: a mount plate 321 covering the open back side of the fan housing 311; a duct flange 324 extending from one end of the mount plate 31; an upper flange 322 extending from the upper ends of the mount plate 321 and the duct flange 324; a lower flange 323 extending from the lower ends of the mount plate 321 and the duct flange 324; and a rear flange 325 extending from the end of the duct flange 324 in a direction intersecting the duct flange 324.

[0193] The other end of the fixing plate 321 is in close contact with the fastening surface 1335 of the receiving portion 133. In addition, a connecting hole 3211 is formed in the fixing plate 321, which functions as the intake port of the fan module 31.

[0194] The upper flange 322 includes: a fixed upper flange 3221, a pipe upper flange 3222, and a guide shoulder 3223.

[0195] The fixed upper flange 3221 is bent vertically from the upper end of the fixed plate 321 and extends to a predetermined width. The pipe upper flange 3222 is bent vertically from the upper end of the pipe flange 324 and extends to a predetermined width. The fixed upper flange 3221 and the pipe upper flange 3222 are integrally formed and constitute an L-shape.

[0196] The lower flange 323 includes: a fixed lower flange 3231, a pipe lower flange 3232, and a guide shoulder 3233.

[0197] The fixed lower flange 3231 is bent vertically from the lower end of the fixed plate 321 and extends to a predetermined width. The pipe lower flange 3232 is bent vertically from the lower end of the pipe flange 324 and extends to a predetermined width.

[0198] The upper flange 322 and the lower flange 323 are configured to be symmetrical about the line or surface that divides the fixing plate 321 into two equal parts.

[0199] The guide shoulders 3223 and 3233 will be described in further detail later with reference to the accompanying drawings.

[0200] The upper flange 322 is in close contact with the top surface 1332 of the receiving portion 133, and the lower flange 323 is in close contact with the bottom surface 1333 of the receiving portion 133. Furthermore, when the flow guide 32 is positioned within the receiving portion 133, such as... Figure 4 As shown, the pipe flange 324 forms the back side of the air passage 102, and the air guiding surface 1334 of the receiving portion 133 forms the front side of the air passage 102.

[0201] When the flow guide 32 is installed in the receiving portion 133, the rear flange 325 forms a portion of the back side of the mask body 11. Furthermore, one end of the rear flange 325 contacts the end of the filter housing 34, and the other end of the rear flange 325 forms the side end of the discharge port 101.

[0202] In detail, the outlet 101, which is defined as the outlet end of the air passage 102, can be understood as being defined by the end of the air guide surface 1334 constituting the receiving portion 133 and the other end of the rear flange 325.

[0203] In addition, the space accommodating the filter 33 is defined by the fixing plate 321, the pipe flange 324, the upper flange 322, the lower flange 323, and a portion of the rear flange 325.

[0204] The upper flange 322 and the lower flange 323 respectively support a portion of the upper side and a portion of the lower side of the four sides of the filter 33, thereby preventing the filter from moving in the vertical direction when the user is wearing the mask device 10.

[0205] Additionally, the pipe flange 324 includes: a filter support surface 3241, which extends from the side end of the fixing plate 321 and supports a portion of the side of the filter 33; a bending surface 3242, which extends from the end of the filter support surface 3241; and an air guiding surface 3243, which bends from the end of the bending surface 3242 with a predetermined curvature.

[0206] The air guiding surface 3243 of the pipe flange 324 is formed in a position opposite to the air guiding surface 1334 constituting the receiving portion 133, and can be understood as the front and back sides of the air passage 102 being defined by the two air guiding surfaces 3243 and 1334.

[0207] Utilizing the arc-shaped shape of the air guiding surface 3243, the air channel 102 can be configured such that the cross-sectional area of ​​the inlet connected to the outlet of the fan module 31 increases as it gets closer to the outlet 101.

[0208] On the other hand, a guide groove 3201 and a fixing groove 3202 are formed on each of the pipe upper flange 3222 of the upper flange 322 and the pipe lower flange 3232 of the lower flange 323.

[0209] The guide groove 3201 extends from the bent surface 3242 to a position spaced downward from the rear flange 325. When the flow guide 32 is installed in the receiving portion 133, the installation guide 1332a slides into the guide groove 3201.

[0210] The installation guide 1332a may also be formed on the flange 3222 of the flow guide 32, and the guide groove 3201 may also be formed on the top surface 1332 and bottom surface 1333 of the receiving part 133.

[0211] By inserting the mounting guide 1332a into the guide groove 3201, leakage of a portion of the air expelled from the fan module 31 into the air passage 102 can be prevented. Specifically, leakage of a portion of the air expelled into the air passage 102 is prevented through the gap between the top surface 1332 of the receiving portion 133 and the upper flange 322 of the flow guide 32, and the gap between the bottom surface 1333 of the receiving portion 133 and the lower flange 323 of the flow guide 32.

[0212] Furthermore, the fixing guide 1332b is inserted into the fixing groove 3202 with an interference fit, so that the flow guide 32 can be engaged with the receiving portion 133 without wobbling. Of course, the positions of the fixing guide 1332b and the fixing groove 3202 can also be interchanged, just like the mounting guide 1332a and the guide groove 3201.

[0213] On the other hand, a fan support rib 3212 may be formed on the front side of the fixing plate 321, that is, the open side covering the fan housing 311.

[0214] In detail, the fan support rib 3212 protrudes along the shape of the cover 3112 constituting the fan housing 311 and extends along the outer side of the cover 3112, thereby stably supporting the fan housing 311. The connecting hole 3211 is formed in the inner region of the fan support rib 3212.

[0215] Additionally, a fan fixing protrusion 327 may protrude from the front edge of the outer region corresponding to the fan support rib 3212 in the fixing plate 321. The fan fixing protrusion 327 may include: a first fan fixing protrusion formed at the upper edge of the outer end of the fixing plate 321; and a second fan fixing protrusion formed at the lower edge of the outer end of the fixing plate 321. The outer end of the fixing plate 321 can be understood as the end that is in close contact with the fastening surface 1335 of the receiving portion 133.

[0216] Additionally, a fastening protrusion 328 protrudes from a position spaced apart from the fan fixing protrusion 327. The fastening protrusion 328 can be understood as a unit for fixing the flow guide 32 to the mounting surface 1331 of the receiving portion 133.

[0217] The fastening protrusion 328 may include: a first fastening protrusion formed at a position spaced apart from the first fan fixing protrusion; and a second fastening protrusion formed at a position spaced apart from the second fan fixing protrusion. It should be noted that the number of the fastening protrusions 328 and the fan fixing protrusions 327 is not limited to the illustrated embodiment.

[0218] Additionally, a fastening hook 329 may be protruding from the outer edge of the front side of the fixing plate 321, i.e., the area adjacent to the outer end of the fixing plate 321. The fastening hook 329 engages with the flow guide hook 1339 protruding from the fastening surface 1335 of the receiving portion 133 to prevent the disassembly of the flow guide 32.

[0219] Here, the fastening hook 329, the fastening protrusion 328, and the fan fixing protrusion 327 can be formed symmetrically with reference to the line that divides the fixing plate 321 into two equal parts.

[0220] On the other hand, if the base 3111 bends during the manufacturing process of the base 3111, or if pressure is applied to the fixing plate 321 of the flow guide 32, the PCB (Printed Circuit Board) F of the fan module 31 may be damaged due to interference with the fixing plate 321, or the blades of the fan 312 may generate noise due to contact with the fixing plate 321.

[0221] To prevent this phenomenon, a bending prevention protrusion 326 may protrude from one side of the front of the fixing plate 321. Specifically, the bending prevention protrusion 326 protrudes from the front edge of the fixing plate 321 adjacent to the pipe flange 324.

[0222] In addition, in order to prevent the flow of air expelled from the fan module 31 from being obstructed by the bending prevention protrusion 326, the bending prevention protrusion 326 is preferably formed on the edge of the front edge of the fixing plate 321 corresponding to the inlet a side of the fan module 31.

[0223] Therefore, when the flow guide 32 is placed on the cover 3112 of the fan module 31, the end of the bending prevention protrusion 326 will contact the surface of the base corresponding to the inlet a region (see reference). Figure 15 (The dashed circle shown).

[0224] By utilizing the bending prevention protrusion 326, interference of the PCB (Printed Circuit Board) F or noise caused by the blades of the fan 312 contacting the fixed plate 321 due to the bending of the base 3111 or the external force applied to the fixed plate 321 can be prevented.

[0225] It is not excluded that the bending prevention protrusions 326 are respectively formed on the upper and lower edges of the front side of the fixing plate 321. That is, the two bending prevention protrusions 326 can protrude from positions symmetrical to each other and contact the inlet a region and the outlet b region.

[0226] Figure 17 This is a cross-sectional perspective view of the filter housing according to an embodiment of the present invention.

[0227] Reference Figure 17 In this embodiment of the invention, the front of the filter housing 34 faces the back of the filter 33 disposed on the back of the flow guide 32, and the back of the filter housing 34 forms a portion of the back of the mask body 11. That is, when a user wears the mask device 10, the back of the filter housing 34 faces the user's face.

[0228] In detail, the filter housing 34 includes: a filter frame 341 surrounding three sides of the filter 33; and a filter cover 342 formed on the back of the filter frame 341.

[0229] The filter cover 342 can be described as including: a cover body 342a having the inlet 343, the filter frame 341 extending from the front of the cover body 342a; and an extension 342b extending from one end of the cover body 342a.

[0230] The extension 342b can be formed in a gently curved manner to conform to the back contour of the mask body 11. The locking groove 3421 can be formed at the end of the extension 342b. When the filter cover 342 is closed, the locking groove 3421 and the locking groove 1337 formed at the side end of the rear body 13 (see reference) Figure 14 (Connected)

[0231] Additionally, a fastening hook 344 protrudes from the center of the front of the extension 342b. If the filter cover 342 is closed, the fastening hook 344 engages with the filter hook 1338, thus securing the filter cover 342 to the rear body 13 (see reference). Figure 22 ).

[0232] When the filter cover 342 is closed, the back side of the filter cover 342 forms part of the back side of the rear body 13 or part of the back side of the mask body 11. That is, the portion of the rear body 13 that defines the back side of the receiving portion 133, excluding the opening, and the filter cover 342 together complete the back side of the mask body 11.

[0233] Hinges 346 protrude from both sides of the inner end of the filter housing 34, which is opposite to the extension 342b. The hinges 346 are inserted into the hinge holes 1332c, which are formed into elongated holes. During the opening and closing of the filter housing 34, the hinges 346 will move between one end and the other end of the hinge holes 1332c.

[0234] In detail, the filter frame 341 includes: a side frame 3411 extending forward from one side end of the cover body 342a; a top frame 3412 extending forward from the upper end of the cover body 342a; and a bottom frame formed opposite to the top frame 3412. Therefore, the filter frame 341 only surrounds three sides of the filter 33.

[0235] Guide grooves 3414 are formed in the top frame 3412 and the bottom frame, accommodating guide shoulders 3223 and 3233 of the flow guide 32. When the filter housing 34 is closed after the filter is inserted, the fastening hooks 344 of the filter housing 34 smoothly engage with the filter hooks 1338 through the engagement process of the guide grooves 3414 and the guide shoulders 3223 and 3233. This will be described in detail later with reference to the accompanying drawings.

[0236] Alternatively, the side frame 3411 can also be described as dividing the filter cover 342 into the boundary surface of the cover body 342a and the extension 342b.

[0237] Figures 18 to 22 This is a cross-sectional view showing the closing process of the filter housing according to an embodiment of the present invention.

[0238] Reference Figures 18 to 22 As described above, the hinge 346 of the filter housing 34 is inserted into the hinge hole 1332c, which is an obliquely extending elongated hole.

[0239] Specifically, the user grasps the end of the extension 342b and lifts it to disengage the fastening hook 344 of the filter housing 34 from the filter hook 1338. If the fastening hook 344 disengages from the filter hook 1338, the user grasps the end of the extension 342b and pulls it upwards towards the side end of the mask body 11. This causes the hinge 346 to move from one end of the hinge hole 1332c to the other end, increasing the opening angle of the filter housing 34. As a result, the filter housing 34 is opened without interfering with the rear flange 325 of the flow guide 32.

[0240] Figure 18 This is a cross-sectional view showing the filter housing 34 with the door 344 fully opened, with the hinge 346 located at the other end of the hinge hole 1332c.

[0241] In this state, if the filter housing 34 is closed before the hinge 346 contacts one end of the hinge hole 1332c, the engaging portion 3442 of the fastening hook 344 may slide along the outer surface of the filter hook 1338, preventing the hook from engaging. Furthermore, if the user closes the filter housing 34 with excessive force, the fastening hook 344 may break.

[0242] The present invention provides a structure that allows the fastening hook 344 to be accurately engaged with the filter hook 1338 even when the user performs the action of closing the filter housing 34 before the hinge 346 is pushed in to contact one end of the hinge hole 1332c.

[0243] As an example, guide shoulders 3223 and 3233 protrude in an arcuate manner from the flow guide 32, and guide grooves 3414 are formed on the side of the filter housing 34. Furthermore, if the filter housing 34 is closed, the guide grooves 3414 slide along the arcuate surfaces of the guide shoulders 3223 and 3233, and during this process, the guide shoulders 3223 and 3233 accurately engage with the guide grooves 3414, thereby engaging the engaging portion 3442 of the fastening hook 344 with the inner side of the filter hook 1338.

[0244] like Figures 18 to 22 As shown, as the opening angle of the filter housing 34 gradually decreases, the guide groove 3414 moves towards the position where it engages with the guide shoulders 3223 and 3233. Simultaneously, the hinge 346 moves from one end of the hinge hole 1332c to the other.

[0245] Figure 23 This is a cross-sectional perspective view of the filter housing according to another embodiment of the present invention.

[0246] Reference Figure 23 In another embodiment of the present invention, the top frame 3412 and the bottom frame 3413 of the filter housing 34 are not separately formed with guide grooves, and the flow guide 32 is not formed with guide shoulders.

[0247] However, the end shape of the fastening hook 344 is improved so that the fastening hook 344 and the filter hook 3818 are securely fastened when the filter housing 34 is closed.

[0248] In detail, the fastening hook 344 includes: an extension 3441 extending from the filter cover 342; and an engaging portion 3442 formed at the end of the extension 3441.

[0249] The engaging portion 3442 includes: an engaging surface 3442a, inclined toward the outer edge of the filter housing 34; a sliding surface 3442b, extending in a straight line from the end of the engaging surface 3442a; and a contact surface 3442c, bent at a predetermined curvature from the end of the sliding surface 3442b.

[0250] The contact surface 3442c is the surface that first contacts the filter hook 1338 when the filter housing 34 is closed.

[0251] Figures 24 to 28 This is a cross-sectional view showing the closing process of the filter housing according to another embodiment of the present invention.

[0252] Reference Figures 24 to 28With the filter housing 34 open, the hinge 346 is hooked by the other end of the hinge hole 1332c.

[0253] In this state, if the user rotates the filter housing 34 without pushing the end of the filter housing 34 into the hinge 346, i.e., towards Figure 24 If the arrow direction is followed to push the filter housing 34 to close it, then... Figure 26 As shown, the tip of the filter hook 1338 contacts the contact surface 3442c.

[0254] With the tip of the filter hook 1338 in contact with the contact surface 3442c, if the back of the filter housing 34 is further pressed, then... Figure 27 As shown, the tip of the filter hook 1338 moves along the contact surface 3442c and reaches the sliding surface 3442b. As the tip of the filter hook 1338 moves along the contact surface 3442c and the sliding surface 3442b, the hinge 346 will move toward one end of the hinge hole 1332c.

[0255] In this state, when the back of the filter housing 34 is completely closed, with a "click", the inner side of the filter hook 1338 contacts the engagement surface 3442a, so that the engagement part 3442 engages with the filter hook 1338.

[0256] By utilizing the shape of the engaging portion 3442 of the fastening hook 344, when the user closes the filter housing 34, the end of the fastening hook 344 will not slide along the outer side of the filter hook 1338, thus preventing the fastening hook 344 from breaking.

Claims

1. A mask-making device, in, include: The mask body includes a front body and a back body, the back body being attached to the back of the front body to cover the user's face, and a pair of receiving portions protruding forward from the back body; A face shield is attached to the back of the main body and fits snugly against the user's face, forming a breathing space on the inside of the face shield; The fan module is housed in the receiving portion; A flow guide is disposed on the back of the fan module, forming part of an outlet that communicates with the breathing space; A filter, disposed within the flow guide; and A filter housing is rotatably connected to the rear body, covers the filter, and forms an intake port for drawing in outside air; The outlet is located at a position spaced apart from the inlet in the direction of the center of the rear body. Air inhaled through the inlet passes through the filter and is then exhaled into the breathing space. The fan module includes a centrifugal fan that draws in air axially and discharges it radially. Each of the two receiving portions includes: A fastening surface extends forward from the side end of the rear body, and a filter hook protrudes from the back of the fastening surface; A mounting surface extends from the end of the fastening surface toward the center of the rear body, and the fan module is mounted on the back of the mounting surface; An air guiding surface connects the end of the mounting surface to the front of the rear body; The top surface, connecting the upper end of the fastening surface, the mounting surface, and the air guiding surface to the front of the rear body; and The bottom surface connects the lower end of the fastening surface, the mounting surface, and the air guiding surface to the front of the rear main body. The filter housing includes: A pair of filter frames extend parallel to each other in a state of facing each other; Filter cover, attached to the back of the pair of filter frames; Hinges extending from the edges of each of the pair of filter frames; and A fastening hook extends from the side end of the filter housing opposite to the side end where the hinge is formed, and engages with the filter hook. The fastening hook includes: An extension extending from the front of the filter cover; and An engaging portion is formed at the end of the extension. The engaging portion includes: The engaging surface is inclined towards the outer edge of the filter housing; The sliding surface curves from the end of the engaging surface and extends in a straight line; and The contact surface is formed with an arc at a specified curvature from the end of the sliding surface.

2. The mask-making device according to claim 1, wherein, The sliding surface bends away from the outer edge of the filter housing. The contact surface bends in the same direction as the sliding surface bends from the end of the engaging surface.

3. The mask-making device according to claim 2, wherein, The filter frame supports the sides of the filter. The filter cover covers the rear end of the filter frame. The fastening hooks extend from the front of the filter cover.

4. The mask-making device according to claim 1, wherein, The filter cover includes: The cover body has the aforementioned suction port; and An extension extends in an arc from the end of the cover body. The extension of the fastening hook extends from the extension of the filter cover.

5. The mask-making device according to claim 1, wherein, A hinge hole in the shape of an elongated hole is formed on the edge of each of the top and bottom surfaces adjacent to the air guiding surface for the hinge to be inserted. The hinge hole extends a predetermined length from the air guide surface to the fastening surface side. One end of the hinge hole is formed to be closer to the front end of the top and bottom surfaces than the rear ends of the top and bottom surfaces. The other end of the hinge hole is formed to be closer to the rear end of the top and bottom surfaces than the front end of the top and bottom surfaces.

6. The mask-making device according to claim 5, wherein, With the filter housing closed, the hinge is engaged with one end of the hinge hole. When the fastening hook is disengaged from the filter hook and the filter housing is opened, the hinge is able to move toward a position close to the other end of the hinge hole.

7. The mask-making device according to claim 6, wherein, If the filter housing is closed with the hinge connected to the other end of the hinge hole, the contact surface of the fastening hook contacts the tip of the filter hook.

8. The mask-making device according to claim 7, wherein, If a pressing force is applied to the filter housing while the contact surface of the fastening hook is in contact with the tip of the filter hook, the tip of the filter hook will move relative to the contact surface and the sliding surface as the hinge moves toward one end of the hinge hole.

9. The mask-making device according to claim 8, wherein, If the filter housing is fully closed, the engaging surface contacts the inner side of the filter hook. The hinge is connected to one end of the hinge hole.

10. The mask-making device according to claim 1, wherein, The direction in which the engaging surface bends from the end of the extension of the fastening hook is opposite to the direction in which the sliding surface bends from the end of the engaging surface and the direction in which the contact surface is formed in an arc from the end of the sliding surface.

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