Mask device

Abstract

The mask device according to an embodiment of the present invention includes: a mask body including a rear body and a front body coupled to the front of the rear body, having an inhalation port and an exhalation port formed therein; a face shield magnetically coupled to the back of the rear body and closely attached to the user's face, with a breathing space formed inside the face shield; and an air purification module installed in the rear body to purify external air flowing into the inhalation port and supply it to the breathing space; the face shield includes: a coupling part facing the back of the rear body and provided with a magnetic body; a close attachment part closely attached to the user's face; and a connection part formed to connect the coupling part and the close attachment part, having a predetermined width in the front-rear direction; the magnetic body includes: a first magnetic body disposed at the center of the upper end of the front surface of the coupling part; and a second magnetic body and a third magnetic body disposed to be spaced apart from each other to both sides with the center of the lower end of the front surface of the coupling part as a reference.

Description

Technical Field

[0001] The present invention relates to a mask device. Background Art

[0002] A mask can be defined as a sanitary product that covers the user's nose and mouth, filters harmful substances such as germs or dust contained in the air when the user inhales, and minimizes the spread of viruses or bad breath discharged when the user exhales to people around them.

[0003] Recently, due to the rampant spread of highly contagious and infectious viruses, for safety reasons, everyone is advised to wear a mask when going out to minimize infection.

[0004] At present, various types and forms of masks are launched on the market. In particular, many masks equipped with filter modules are being sold to minimize the direct flow of harmful substances contained in the air into the respiratory organs of the mask wearer.

[0005] In addition, many masks are sold that are equipped with fans to facilitate the flow of air through the mask when the user inhales or exhales.

[0006] Conventional masks, including the mask disclosed in the following prior art (Patent Document 1: EP3398657A), all have filters so that harmful substances contained in the external air are filtered before flowing into the user's respiratory organs.

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

[0008] However, most masks currently available and marketed have the following structure: an air intake port is formed on the front of the mask, and an air discharge port is formed on the back of the mask, specifically, at a position close to the user's mouth or nose. Here, the front of the mask refers to the portion exposed to the outside, while the back of the mask refers to the portion that comes into close contact with the user's face.

[0009] In detail, the air inlet formed on the mask is usually formed at a position near the center of the mask on the front or near the two side ends on the front. In the above-mentioned prior art, it is formed at a position near the two side ends of the mask on the front.

[0010] In the structure where the air inlet is formed on the front of the mask and the air outlet is formed on the back of the mask as described above, external air flows into the interior of the mask, passes through the fan and filter, and is then discharged to the user's respiratory organs via the air outlet. During this process, there is a problem of excessive air flow conversion occurring.

[0011] As the number of air flow conversions of the inhaled air increases, the flow resistance increases, resulting in an increase in the load on the fan. In addition, as the load on the fan increases, there is a problem of increased power consumption of the battery that powers the fan.

[0012] Moreover, as the number of air flow conversions of the inhaled air increases, there is also a problem of increased flow noise.

[0013] In addition, users wearing a mask with an air inlet configured on the front of the mask tend to place the mask in a state where the air inlet faces upward or forward after removing the mask. Therefore, there is a relatively high possibility of dust flowing in through the air inlet.

[0014] In addition, when the air inlet is configured on the front of the mask, it may give an unappealing appearance impression when worn.

[0015] In addition, in order to prevent the air inlet from being directly exposed to the outside, an inlet cover is also installed. In this case, there may be a phenomenon where the inlet cover detaches from or is damaged by the mask due to a force or impact acting from the outside.

[0016] In addition, in a structure where the air inlet is not formed in the mask body but in other parts, for example, when the air inlet is formed in a separate air purification module that is detachably or foldably coupled to the side of the mask body, there is a disadvantage that the flow resistance significantly increases during the period when the air inhaled into the air purification module reaches the outlet formed in the center of the mask body.

[0017] Patent Document 1: EP3398657A (April 21, 2021) Summary of the Invention

[0018] The present invention is proposed to improve the problems described above.

[0019] The mask device according to an embodiment of the present invention includes: a mask body including a rear body and a front body coupled to the front of the rear body, having an air inlet and an air outlet formed therein; a face shield magnetically coupled to the back of the rear body and closely attached to the user's face, with a breathing space formed inside the face shield; and an air purification module installed on the rear body to purify external air flowing into the air inlet and supply it to the breathing space.

[0020] In particular, the mask device according to an embodiment of the present invention is characterized in that the face shield includes: a coupling part facing the back surface of the rear main body, provided with a magnetic body; a close contact part closely contacting the user's face; and a connection part formed to connect the coupling part and the close contact part, having a predetermined width in the front-rear direction; the magnetic body includes: a first magnetic body disposed at the center of the upper end of the front surface of the coupling part; and a second magnetic body and a third magnetic body disposed to be separated from each other to both sides with the center of the lower end of the front surface of the coupling part as a reference.

[0021] The first magnetic body may be located in a part of the face shield corresponding to the upper side of the air purification module, and the second magnetic body and the third magnetic body may be located in a part of the face shield corresponding to the lower side of the air purification module.

[0022] The suction port is located outside the breathing space, and the discharge port is located inside the breathing space.

[0023] The first magnetic body may be located in a part of the face shield corresponding to the upper side of the discharge port, and the second magnetic body and the third magnetic body may be located in a part of the face shield corresponding to the lower side of the discharge port.

[0024] The first magnetic body to the third magnetic body may be respectively inserted into the inside of a plurality of magnetic body mounting parts provided on the face shield. At this time, the plurality of magnetic body mounting parts protrude from the front surface of the coupling part and are magnetically coupled to the back surface of the rear main body.

[0025] A magnet mounting part protrudes from the front surface of the rear main body, a magnet is mounted on the magnet mounting part, and a magnet mounting groove for attaching the magnetic body mounting part is formed at a position on the back surface of the rear main body corresponding to the front and back of the magnet mounting part.

[0026] The magnetic body mounting part includes: a mounting part main body protruding forward from the outer surface of the coupling part; and an insertion guide rib formed inside the mounting part main body; the magnetic body may be inserted into the inside of the mounting part main body through an insertion hole formed between the mounting part main body and the insertion guide rib.

[0027] The mounting part main body forms an inner space with an open front surface for accommodating the magnetic body, and the magnetic body may be detachably coupled to the mounting part main body through the open front surface of the mounting part main body.

[0028] The air purification module includes: a filter disposed in front of the suction port; and a filter cover body mounted on the rear main body to cover the filter; the suction port may be formed in the filter cover body.

[0029] The mask device according to the embodiment of the present invention as described above has the following effects.

[0030] First, both the suction port and the discharge port of the mask device are formed on the back surface of the mask body covering the user's face. Therefore, compared with the case where the suction port of the mask device is formed on the front surface of the mask body or other parts other than the mask body, it has the effect of significantly reducing the flow resistance.

[0031] Second, in the state where the user wears the mask device, the suction port is not exposed to the outside. Therefore, it has the advantage of not requiring an additional cover member for blocking the suction port. Furthermore, since there is no need to install an additional cover member on the front surface of the mask device, there is an effect that the cover member will not be damaged or separated due to external force.

[0032] Third, since the suction port is formed on the back surface of the mask body, it has the advantage that when the mask device is removed and the front surface of the mask body faces forward or upward, the phenomenon of dust or other foreign objects flowing into the mask device through the suction port can be minimized.

[0033] Fourth, since the face shield can be combined with the mask body by magnetic force without an additional fastening structure, it has the advantage of simple installation and separation of the face shield.

[0034] In particular, since a magnetic body mounting portion is provided at the upper center of the face shield and two magnetic body mounting portions are provided at the lower portion of the face shield, as long as the magnetic body mounting portion located at the upper portion of the face shield is first attached to the mask body, the bonding positions of the remaining two magnetic body mounting portions can be positioned.

[0035] Therefore, it is not necessary to align a plurality of magnetic body mounting portions with the corresponding positions of the mask body, eliminating the possibility of misbonding, and thus having the advantage of facilitating the installation and separation of the face shield.

[0036] Fifth, since the magnetic body is gently inserted through the insertion guide ribs formed inside the magnetic body mounting portion, it has the advantage of facilitating the installation and disassembly of the magnetic body.

[0037] Sixth, the magnetic body is composed of a magnetic main body and a pair of fixing hooks respectively extending rearward from both ends of the magnetic main body, and the fixing hooks are inserted into the inside of the mounting portion main body in an interference fit manner. Therefore, it has the advantage of preventing the magnetic body from separating from the magnetic body mounting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a front view of the mask device according to the embodiment of the present invention.

[0039] Figure 2 is a rear perspective view of the mask device.

[0040] Figure 3 is an exploded perspective view of the mask device.

[0041] Figure 4 is a front perspective view of the mask device with the front main body separated.

[0042] Figure 5 is a rear perspective view of the front main body constituting the mask device of the embodiment of the present invention.

[0043] Figure 6 is a front perspective view of the rear main body constituting the mask device of the embodiment of the present invention.

[0044] Figure 7 is a rear perspective view of the rear main body.

[0045] Figure 8 is a transverse cross-sectional view of the mask device of the embodiment of the present invention.

[0046] Figure 9 is a longitudinal cross-sectional view of the mask device.

[0047] Figure 10 is a front view of the face shield of the embodiment of the present invention.

[0048] Figure 11 is a rear view of the face shield.

[0049] Figure 12 is a side view of the face shield.

[0050] Figure 13 is along Figure 11 a partial cross-sectional view of the face shield cut along line 13-13.

[0051] Figure 14 is to Figure 13 enlarge and show part "A".

[0052] Figure 15 is a perspective view of the magnet of the embodiment of the present invention.

[0053] Figure 16 is a side view of the magnet.

[0054] Figure 17 is a longitudinal cross-sectional view of the magnet mounting portion combined with the magnet.

[0055] Figure 18 is a transverse cross-sectional view showing the state where the magnet mounting portion of the rear main body and the magnet mounting portion of the face shield are combined. Detailed Description

[0056] Figure 1is the front view of the mask device according to an embodiment of the present invention, Figure 2 is the rear perspective view of the mask device, Figure 3 is the exploded perspective view of the mask device, Figure 4 is the front perspective view of the mask device with the front main body separated.

[0057] Referring to Figures 1 to 4 , the mask device 10 according to an embodiment of the present invention includes: a mask main body 11; a face shield 14, which is coupled to the back of the mask main body 11 in a detachable or attachable manner; and an air purification module 30, which is installed inside the mask main body 11.

[0058] Specifically, the mask main body 11 includes: a front main body 12, which forms the front outer shape; and a rear main body 13, which is coupled to the back of the front main body 12 to form the rear outer shape. The front of the front main body 12 forms the front of the mask device 10, and the back of the rear main body 13 faces the face of the user (or wearer).

[0059] In addition, the face shield 14 is coupled to the back of the rear main body 13 and is in close contact with the face of the user, and it can be formed of a stretchable silicone or rubber material. A breathing space is formed inside the face shield 14. When the user wears the mask device 10, the nose and mouth of the user are accommodated in the breathing space. Therefore, the outside air that is purified while passing through the air purification module 30 is guided to the breathing space and is inhaled by the user, and the air generated when the user exhales is also discharged to the breathing space.

[0060] A predetermined space is formed between the front main body 12 and the rear main body 13. As Figure 4 shown, various electrical components are installed on the front of the rear main body 13. In addition, the various electrical components are shielded by the front main body 12 and are not exposed to the outside.

[0061] In addition, the air purification module 30 includes: a fan module 31, which is placed in the accommodation part 133 (refer to Figure 6 ) formed in the rear main body 13; and a filter 33, which is placed behind the fan module 31. The fan module 31 includes a centrifugal fan that sucks air along the axial direction and discharges it along the radial direction.

[0062] The air purification module 30 further includes a filter cover body 34 placed behind the filter 33, and an air inlet for sucking outside air is formed in the filter cover body 34. The filter cover body 34 can be rotatably coupled to the rear main body 13. As shown in the figure, the air inlet can be provided in the form of an intake grille 343.

[0063] Specifically, the filter cover 34 includes: a filter frame 341 surrounding three sides of the filter 33; and a filter cover 342 formed on the back surface of the filter frame 341. The suction grille 343 is included in the filter cover 342.

[0064] It can be understood that the suction grille 343 is a structure composed of a plurality of suction slits 3431 and a plurality of partition ribs 3432 arranged between adjacent suction slits 3431. It can also be understood that the suction grille 343 is a structure in which a large suction port is divided into a plurality of slender suction slits 3431 by a plurality of the partition ribs 3432. In addition, the plurality of slender suction slits 3431 can be divided into an upper slit and a lower slit by a reinforcing rib 3422. It should be clear that hereinafter, the suction port formed on the back surface of the mask device 10 for sucking external air is defined to include various forms of holes represented by the suction grille 343, and the suction port of the mask body 11 and the suction grille 343 should be interpreted to have the same meaning.

[0065] In addition, an exhalation port 101 is formed at a position spaced from the suction port toward the center of the rear main body 13. By the operation of the fan module 31, the external air sucked through the suction port or the suction grille 343 sequentially passes through the filter 33 and the fan module 31, and then is discharged through the exhalation port 101 into the breathing space.

[0066] The suction port, that is, the suction grille 343 is arranged outside the face shield 14, while the exhalation port 101 is arranged inside the face shield 14. That is, the suction grille 343 is located outside the breathing space, and the exhalation port 101 is located inside the breathing space, so that the inhaled external air and the air exhaled by the user do not mix with each other.

[0067] On the other hand, the air purification module 30 further includes a flow guide 32 arranged behind the fan module 31.

[0068] In addition, the mask device 10 further includes at least one of a main control module 15, a power supply module 16, an indicator module 18, a wireless communication module 17, a speaker module 19, a battery 20, and an exhaust valve 21.

[0069] Specifically, the main control module 15 is a module for controlling the operation of the fan module 31, the speaker module 19, and the pressure sensor and microphone described later. The main control module 15 can be arranged at the upper part of the front center of the rear main body 13.

[0070] The power supply module 16 is a control module for supplying power to the electrical components installed in the mask device 10. The power supply module 16 may be configured at the lower right end of the front surface of the rear body 13.

[0071] A cable connector and an LED module may be installed in the power supply module 16. Terminals of a cable for supplying power and transmitting data are inserted into the cable connector, and the LED module is used to notify the operating state of the mask device 10. In addition, the light irradiated from the LED module is diffused and guided by the indicator module 18 and irradiated to the outside of the mask device 10.

[0072] The wireless communication module 17 may be any one of various types of short-range wireless communication modules including Bluetooth. The wireless communication module 17 may be configured at the lower left end of the front surface of the rear body 13. The wireless communication module 17 may be installed horizontally on the front surface of the rear body 13 in a direction crossing the rear body 13. The wireless communication module 17 may be installed horizontally on the front surface of the rear body 13 by means of a pair of substrate insertion ribs 1315 protruding from the front surface of the rear body 13. Both end portions of the wireless communication module 17 are supported by the pair of substrate insertion ribs 1315.

[0073] The speaker module 19 may be configured at the lower left end of the front surface of the rear body 13 corresponding to the lower side of the wireless communication module 17.

[0074] The battery 20 may be configured at the center of the front surface of the rear body 13, and the exhaust valve 21 may be configured to shield an exhaust port formed at the lower side of the center of the front surface of the rear body 13. That is, when the user exhales, the exhaust valve 21 may open the exhaust port, and when the user inhales, the exhaust valve 21 may shield the exhaust port. The exhaust valve 21 may be provided in the form of a bendable and flat flap.

[0075] Here, it should be clear that the front, back, left, and right of the mask body 11 are defined based on the state where the user wears the mask device 10.

[0076] Figure 5 It is a rear perspective view of the front body of the mask device according to an embodiment of the present invention.

[0077] Refer to Figure 5 , the front body 12 of the mask device 10 according to an embodiment of the present invention forms the front appearance of the mask device 10.

[0078] When the front surface of the front main body 12 is formed flatly as a single body without installing additional components, it has the advantage of looking neat in appearance. In the case where suction ports are formed on the left and right sides of the front main body 12, there is a drawback as follows: If the mask device 10 is removed and placed with the suction ports facing upward, there is a high possibility that foreign substances will flow into the interior of the mask device 10 through the suction ports.

[0079] Moreover, in the case of installing an additional cover to minimize the inflow of foreign substances by shielding the suction ports, a gap needs to be formed between the edge of the cover and the front surface of the front main body 12 so that external air can flow in. That is, there is a limitation that the additional cover needs to be combined with the front surface of the front main body 12 to protrude from the front surface of the front main body 12.

[0080] As a result, the additional cover is highly likely to be damaged by external force or separated from the front main body 12 when hitting surrounding obstacles. For this reason, it is designed that the suction ports for inhaling external air are not formed on the front main body 12 as much as possible to prevent protrusion due to additionally installing additional components on the front surface of the front main body 12, which is not only beneficial to the appearance but also beneficial to ensuring durability.

[0081] Considering this aspect, on the front surface of the front main body 12 in the embodiment of the present invention, there is not only no suction port for inhaling external air, but also no additional components including a cover are installed at all, so that the front surface is designed to form a smooth and continuous single surface. However, in order to output the user's voice to the outside, a speaker hole 123 is formed on the lower side.

[0082] On the other hand, a plurality of convex structures are formed on the back surface of the front main body 12.

[0083] Specifically, one or a plurality of substrate fixing ribs 125 protrude from the upper end of the center of the back surface of the front main body 12. When the edge of the front main body 12 is combined with the front edge of the rear main body 13, one or a plurality of the substrate fixing ribs 125 press the front surface of the main control module 15 installed on the rear main body 13, thereby preventing the main control module 15 from shaking.

[0084] A valve support rib 121 that protrudes horizontally is formed on the back surface of the front main body 12. When the front main body 12 is combined with the rear main body 13, the valve support rib 121 is formed at the position where the upper end of the exhaust valve 21 is located, thereby pressing the upper end of the front surface of the exhaust valve 21. As an example, the valve support rib 121 can extend backward by a predetermined length with a predetermined width from a position spaced a predetermined distance downward from the center of the back surface of the front main body 12.

[0085] In addition, a pair of magnet pressing ribs 126 protrude from the back surface of the front main body 12. Specifically, the face shield 14 is mounted on the back surface of the rear main body 13, a magnet is mounted on the front surface of the face shield 14, and a magnet that generates suction force with the magnet is also mounted on the front surface of the rear main body 13. As a result, the face shield 14 is detachably mounted on the back surface of the rear main body 13 by the magnetic force of the magnet.

[0086] At this time, a pair of lower magnet mounting portions 135 for mounting the magnet are formed on the front surface of the rear main body 13 (refer to Figure 6 ). In addition, the pair of magnet pressing ribs 126 function to press a pair of magnets respectively mounted on the pair of lower magnet mounting portions 135.

[0087] In addition, a substrate pressing rib 127 that contacts the front end portion of the substrate constituting the wireless communication module 17 protrudes from the back surface of the front main body 12. Specifically, if the front main body 12 and the rear main body 13 are combined with each other, the substrate pressing rib 127 presses the front end portion of the substrate constituting the wireless communication module 17 to prevent the wireless communication module 17 from shaking or detaching from the substrate insertion rib 1315.

[0088] In addition, a support rib 122 is formed at a position corresponding to the edge of the speaker hole 123 on the back surface of the front main body 12, and the support rib 122 surrounds and supports the front end portion edge of the speaker module 19. The support rib 122 can surround in a shape corresponding to the shape of the front surface portion of the speaker module 19.

[0089] In addition, a substrate fixing rib 124 that presses the front surface of the power module 16 protrudes from the back surface of the front main body 12. The substrate fixing rib 124 presses the front surface of the substrate constituting the power module 16 to prevent the power module 16 from shaking or detaching from the rear main body 13.

[0090] Figure 6 is a front perspective view of the front surface of the rear main body constituting the mask device according to an embodiment of the present invention, Figure 7 is a rear perspective view of the rear main body.

[0091] Refer to Figure 6 and Figure 7 , the rear main body 13 of the mask device 10 according to an embodiment of the present invention includes: a mask portion 131 that covers the user's face; and a welding portion 132 that bends forward from the edge of the mask portion 131.

[0092] Specifically, the welding part 132 is continuously formed along the top surface edge, both side surface edges, and the bottom surface edge of the mask part 131. In addition, the front-rear direction width of the welding part 132 that is bent along the bottom surface edge of the mask part 131 and extends forward is the largest.

[0093] The portion of the welding part 132 formed on the bottom surface edge of the mask part 131 can be specifically defined as an extension table. The extension table has a convex circular shape, and its front-rear direction width increases as it approaches the center from both side ends of the rear main body 13.

[0094] A bottom exhaust port 1362 can be formed at the center of the welding part 132 defined as the extension table. And a button hole 1321 can be formed at a position spaced apart from the bottom exhaust port 1362 toward the side end part of the rear main body 13. A power button is inserted into the button hole 1321. Indicator holes 1322 are respectively formed at positions spaced apart from the left and right edges of the button hole 1321.

[0095] The light irradiated from the light-emitting device installed in the power module 16 is irradiated to the outside through the pair of indicator holes 1322. The light-emitting device includes an LED module.

[0096] If the light is irradiated to the outside through any one of the pair of indicator holes 1322, it can indicate that the power supply of the mask device 10 is in the on state. In addition, the remaining power of the battery 20 can be predicted according to the color of the light irradiated through the other one of the pair of indicator holes 1322.

[0097] A terminal insertion port 1323 is formed at a position further spaced apart from the button hole 1321 toward the side end part of the rear main body 13. A USB (Universal Serial Bus) cable can pass through the terminal insertion port 1323 and be inserted into a terminal connector formed in the power module 16. The battery 20 can be charged through the USB cable, and the version or function of the mask device 10 can be updated or upgraded according to the data transmitted through the USB cable.

[0098] A receiving part 133 for receiving the air purification module 30 is formed in the rear main body 13. The receiving parts 133 are respectively formed on the left and right sides of the center of the rear main body 13, and the pair of receiving parts 133 are symmetric with respect to a vertical line passing through the center of the rear main body 13.

[0099] The accommodation part 133 forms a space for accommodating the air purification module 30 by protruding forward from the front surface of the mask part 131. The accommodation part 133 includes: a placement surface 1331 for placing the air purification module 30, specifically the fan module 31; a fastening surface 1335 connecting the outer edge of the placement surface 1331 at the side end of the mask part 131; and an air guiding surface 1334 connecting the front surface of the mask part 131 at the inner edge of the placement surface 1331.

[0100] In addition, the accommodation part 133 further includes a top surface 1332 connecting the upper ends of the placement surface 1331, the air guiding surface 1334, and the fastening surface 1335 to the front surface of the mask part 131. Further, the accommodation part 133 further includes a bottom surface 1333 connecting the lower ends of the placement surface 1331, the air guiding surface 1334, and the fastening surface 1335 to the front surface of the mask part 131.

[0101] One or a plurality of fastening devices, such as fastening hooks, are formed on the fastening surface 1335.

[0102] Fan mounting holes 1336 are formed in the placement surface 1331, and the top surface 1332 and the bottom surface 1333 may extend horizontally and may extend parallel to each other.

[0103] The fastening surface 1335 may protrude with a curvature toward the outside of the rear main body 13, and may be formed to incline toward the center of the rear main body 13 as it approaches the placement surface 1331 from the mask part 131.

[0104] The air guiding surface 1334 may be designed to protrude and extend with a curvature from the placement surface 1331 toward the mask part 131, so that the air sucked by the fan module 31 is gently guided along the air guiding surface 1334 to the side of the discharge port 101.

[0105] As another example, the air guiding surface 1334 may be composed of an arc portion bent with a specified curvature at the inner edge of the placement surface 1331 and an inclined portion flatly and obliquely connecting the mask part 131 from the end of the arc portion.

[0106] The accommodation part 133 includes a left accommodation part formed on the left side of the center of the rear main body 13 and a right accommodation part formed on the right side of the center of the rear main body 13. The left accommodation part and the right accommodation part are separated by a specified interval from the center of the rear main body 13, and the battery 20 is installed in the space between the left accommodation part and the right accommodation part.

[0107] A battery mounting portion 138 may be formed on the front surface of the rear main body 13. Specifically, the battery mounting portion 138 includes a pair of battery placement ribs 1381 and a battery support rib 1382.

[0108] A pair of the battery placement ribs 1381 protrude forward from the front surface of the mask portion 131 or the edge of the air guiding surface 1334 and extend parallel in the vertical direction. The pair of battery placement ribs 1381 support the back surface of the battery 20.

[0109] One end of the battery support rib 1382 extends from any one of the left air guiding surface 1334 and the right air guiding surface 1334, and the other end is connected to the other side of the left air guiding surface 1334 and the right air guiding surface 1334.

[0110] The battery support rib 1382 is formed in an "n" shape and supports the front surface and both side surfaces of the battery 20. Therefore, the phenomenon that the battery 20 is separated from the rear main body 13 can be prevented by using the battery support rib 1382.

[0111] In addition, the central portion of the battery support rib 1382 protrudes forward so as to be able to selectively mount batteries of different sizes.

[0112] Specifically, the battery support rib 1382 may include a pair of extension portions extending forward from the pair of air guiding surfaces 1334 and a connecting portion extending in the lateral direction to connect the pair of extension portions.

[0113] In addition, a part of the connecting portion bends and extends forward, so that the battery support rib 1382 can be described as being composed of a first battery support portion 1382a and a second battery support portion 1382b. Specifically, the first battery support portion 1382a can be used to support a battery with a relatively wide width and a relatively thin thickness, and the second battery support portion 1382b can be used to support a battery with a relatively narrow width and a relatively thick thickness.

[0114] The second battery support portion 1382b can be described as being formed by bending a part of the connecting portion constituting the first battery support portion 1382a forward multiple times. Or, it can be described that the second battery support portion 1382b in a relatively small "n" shape protrudes from the front surface of the first battery support portion 1382a in a relatively large "n" shape.

[0115] An exhaust flow path guide 136 protrudes forward from the front surface of the mask part 131 corresponding to the lower side of the battery mounting part 138. Specifically, the exhaust flow path guide 136 is formed on the lower side of the battery mounting part 138 such that the lower end part of the battery 20 mounted on the battery mounting part 138 is supported by the top surface of the exhaust flow path guide 136. As a result, it is possible to prevent the battery 20 from falling downward due to gravity in a state where it is inserted into the battery mounting part 138.

[0116] The exhaust flow path guide 136 may form a longitudinal cross section that is substantially tunnel-shaped, and a front exhaust port 1361 may be formed at a position corresponding to the inside of the exhaust flow path guide 136 in the mask part 131.

[0117] At least one of the front exhaust port 1361 and the bottom exhaust port 1362 may be formed in the form of an exhaust grille divided into a plurality of small exhaust ports by a plurality of grilles or partition ribs. In addition, the front exhaust port 1361 may be selectively opened and closed by the exhaust valve 21.

[0118] An upper magnet mounting part 134 is formed at the upper center of the front surface of the mask part 131, and a pair of lower magnet mounting parts 135 are formed at the lower end of the front surface of the mask part 131.

[0119] Specifically, the lower magnet mounting parts 135 are respectively formed at the left and right edges of the exhaust flow path guide 136. In addition, the magnets mounted on the lower magnet mounting parts 135 are pressed by a pair of the magnet pressing ribs 126 (refer to Figure 5 ) protruding from the back surface of the front main body 12.

[0120] Strap connection parts 137 are respectively formed at the left and right end parts of the rear main body 13. Specifically, the strap connection parts 137 are parts for connecting the ends of a strap or a band that is hung on the user's ear or wound around the back of the user's head. The strap connection parts 137 are respectively formed at the upper and lower parts of the left end and the upper and lower parts of the right end of the rear main body 13.

[0121] Both ends of any one of a pair of straps may be respectively connected to the strap connection parts 137 provided at the upper and lower left sides, and both ends of the other may be respectively connected to the strap connection parts 137 provided at the upper and lower right sides. In this way, the pair of straps can be respectively hung on both ears of the user.

[0122] As another method, both ends of any one of a pair of hanging straps can be respectively connected to the hanging strap connection parts 137 provided at the upper left end and the upper right end, while both ends of the other one can be respectively connected to the hanging strap connection parts 137 provided at the lower left end and the lower right end. In this way, the pair of hanging straps can surround the back of the user's head.

[0123] Each of the four hanging strap connection parts 137 includes: a hanging strap groove 1373, recessed from the front surface of the rear main body 13 and extending in the transverse direction (the width direction of the rear main body); a hanging strap hole 1374, formed at any point of the hanging strap groove 1373; a hanging strap rod 1372, connecting the top surface and the bottom surface of the hanging strap groove 1373; and a barrel-shaped waterproof rib 1371, extending from a position on the back surface of the rear main body 13 corresponding to the edge of the hanging strap hole 1374.

[0124] On the other hand, a main control module mounting part 139 is formed on the front surface of the rear main body 13.

[0125] Specifically, the main control module mounting part 139 includes: a substrate fixing hook 1391, protruding forward from the front surface of the mask part 131; and a substrate placement rib 1393 and a substrate support rib 1392, supporting the back surface of the main control module 15.

[0126] Specifically, the substrate fixing hook 1391 may include: a pair of first substrate fixing hooks 1391a, located on the upper side of the accommodating part 133; and a pair of second substrate fixing hooks 1391b, located between the pair of accommodating parts 133 facing each other.

[0127] The pair of first substrate fixing hooks 1391a can be arranged at positions spaced upward from the top surface of the left accommodating part and positions spaced upward from the top surface of the right accommodating part. The pair of first substrate fixing hooks 1391a are used to fix the left end part and the right end part of the main control module 15.

[0128] In addition, the pair of second substrate fixing hooks 1391b can be respectively located at positions corresponding to the upper inner ends of the pair of accommodating parts 133. Specifically, any one of the pair of second substrate fixing hooks 1391b can be formed at the position where the upper side corner of the right accommodating part intersects with the front surface of the mask part 131. In addition, the other one of the pair of second substrate fixing hooks 1391b can be formed at the position where the upper side corner of the left accommodating part intersects with the front surface of the mask part 131.

[0129] The pair of second substrate fixing hooks 1391b are used to fix the lower end part of the control substrate constituting the main control module 15.

[0130] In addition, the substrate placement rib 1393 can protrude from a position on the front surface of the mask portion 131 corresponding to the position between a pair of the second substrate fixing hooks 1391b, and can support the back surface of the lower end portion of the control substrate constituting the main control module 15.

[0131] In addition, the back surface of the upper end portion of the main control module 15 can be supported by the front end portion of the upper magnet mounting portion 134. The main control module 15 is in a state separated from the mask portion 131 due to the upper magnet mounting portion 134 and the substrate placement rib 1393, and has the effect of being stably coupled to the rear main body 13 through the substrate fixing hook 1391 without shaking.

[0132] On the other hand, a pressure sensor mounting portion (or a respiratory sensor mounting portion) 130 can be formed at the upper center of the front surface of the mask portion 131. A pressure sensor (described later) mounted on the pressure sensor mounting portion 130 senses the pressure inside the breathing space defined inside the face mask 14. That is, it is possible to determine whether the user is currently inhaling or exhaling based on the pressure change inside the breathing space. It should be noted that the pressure sensor can also be defined as a respiratory sensor, and even if the terms are different, it should be understood as a sensor that performs the same function.

[0133] The pressure sensor mounting portion 130 is provided on the front surface of the rear main body 13. If the main control module 15 is mounted on the main control module mounting portion 139, the pressure sensor mounting portion 130 will be located at the position where the pressure sensor (or respiratory sensor) mounted on the back surface of the main control module 15 is located. Therefore, if the main control module 15 is mounted on the main control module mounting portion 139, the pressure sensor is accommodated inside the pressure sensor mounting portion 130. In addition, the front end portion of the pressure sensor mounting portion 130 is in close contact with the back surface of the control substrate of the main control module 15.

[0134] In addition, a portion defining the bottom of the pressure sensor mounting portion 130 protrudes rearward of the rear main body 13, and a through hole 1301 is formed on the bottom surface of the portion protruding rearward. Through the through hole 1301, the breathing space defined by the back surface of the rear main body 13 and the face mask 14 communicates with the internal space of the pressure sensor mounting portion 130. As a result, a part of the air generated when the user exhales flows into the internal space of the pressure sensor mounting portion 130 through the through hole 1301. In addition, the pressure inside the pressure sensor mounting portion 130 is sensed by the pressure sensor accommodated in the pressure sensor mounting portion 130. In addition, the sensed pressure value is sent to a microcomputer (described later) of the main control module 15, thereby determining the breathing state of the user.

[0135] On the other hand, magnet mounting grooves 1314 are respectively formed at positions on the back surface of the rear main body 13 corresponding to the exact back surface of the upper magnet mounting portion 134 and at positions on the back surface of the rear main body 13 corresponding to the exact back surfaces of the pair of lower magnet mounting portions 135.

[0136] The magnet mounting groove 1314 includes: a first magnet mounting groove 1311 formed at the exact back surface of the upper magnet mounting portion 134; and a second magnet mounting groove 1312 and a third magnet mounting groove 1313 formed at the exact back surfaces of the lower magnet mounting portions 135.

[0137] Under the action of magnetic force, the three magnets mounted on the face shield 14 are respectively attached to the first magnet mounting groove 1311 to the third magnet mounting groove 1313. In addition, if the user pulls the face shield 14 with a force greater than the magnetic force, the face shield 14 can be easily separated from the rear main body 13.

[0138] On the other hand, as described above, a fan mounting hole 1336 may be formed in the placement surface 1331 constituting the accommodation portion 133. In addition, one or a plurality of flow guide member fastening holes 1331a are formed at positions spaced apart from the fan mounting hole 1336 toward the outer edge side of the placement surface 1331. The flow guide member 32 is fixed to the accommodation portion 133 by a fastening member passing through the flow guide member fastening hole 1331a.

[0139] In addition, a flow guide member hook 1339 and a filter hook 1338 are respectively formed on the fastening surface 1335 constituting the accommodation portion 133 so as to be spaced apart in the front-rear direction. The flow guide member hook 1339 is located closer to the placement surface 1331 than the filter hook 1338.

[0140] In addition, a locking groove 1337 is formed at the back side end of the rear main body 13 corresponding to the rear of the filter hook 1338. Specifically, the locking groove 1337 may be formed at a position where the welding portion 132 and the fastening surface 1335 intersect.

[0141] Figure 8 is a transverse cross-sectional view of the mask device according to an embodiment of the present invention, Figure 9 is a longitudinal cross-sectional view of the mask device.

[0142] Referring to Figure 8 and Figure 9 , if the user presses the power button to operate the fan module 31, external air flows into the interior of the mask device 10 through the suction grilles 343 (or suction ports) formed on the left and right sides of the back surface of the mask device 10.

[0143] The outside air flowing in through the inhalation grille 343 is purified when passing through the filter 33. In addition, the air that has passed through the filter 33 is sucked in along the axial direction of the fan module 31 and then discharged radially.

[0144] As Figure 8 shown, the front of the fan module 31 is placed on the placement surface 1331, and the back of the fan module 31 is open. In addition, the open back of the fan module 31 is shielded by the flow guide 32, and a communication hole serving as an air inlet of the fan module 31 is formed in the flow guide 32. The air that has passed through the filter 33 flows into the fan interior through the communication hole.

[0145] In addition, an air passage 102 is defined between the side surface of the flow guide 32 and the air guide surface 1334. In addition, the inlet of the air passage 102 communicates with the outlet (or discharge port) of the fan module 31, and the outlet of the air passage 102 communicates with the discharge port 101.

[0146] In addition, the discharge port 101 is located in the breathing space defined by the back surfaces of the face mask 14 and the rear main body 13. Therefore, the outside air inhaled by the fan module 31 is discharged into the breathing space for the user to inhale.

[0147] In addition, the air guide surface 1334 is gently formed with a curvature from the outlet of the fan module 31 toward the discharge port 101, so that the air discharged radially along the fan module 31 does not have a sharp change in the flow direction during the process of flowing toward the discharge port 101.

[0148] Specifically, in the case of a centrifugal fan, the fact that air is inhaled axially and discharged radially is caused by the shape of a hub that is conical or truncated conical. That is, the flow direction of the air inhaled axially along the centrifugal fan is gently converted by 90 degrees along the curved surface of the hub.

[0149] Here, since the direction of the arc of the hub constituting the fan module 31 is the same as the direction of the arc of the air guide surface 1334, the air inhaled into the fan module 31 only gently changes the flow direction in one direction.

[0150] If the suction grille 343 is formed in the front main body 12, the suction port of the fan module 31 faces the front main body 12. As a result, the arc direction of the hub constituting the fan module is opposite to the arc direction of the air guiding surface 1334. As a result, the air discharged from the fan module 31 collides with the starting portion of the air guiding surface 1334 corresponding to the entrance of the air passage 102, generating flow resistance and flow noise.

[0151] That is, the air sucked in along the axial direction of the fan module 31 substantially forms an "S"-shaped flow, resulting in more flow losses compared to the structure of the present invention that forms a "C" or "n"-shaped flow.

[0152] On the other hand, the air discharged through the user's mouth and nose when the user exhales accumulates in the breathing space. In addition, a very small portion of the air accumulated in the breathing space flows into the interior of the pressure sensor mounting portion 130 through the through hole 1301.

[0153] In addition, most of the air accumulated 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 action of the air pressure generated when the user exhales, the exhaust valve 21 bends forward, opening the front exhaust port 1361. In addition, when the user inhales, the pressure inside the breathing space is lower than the atmospheric pressure, and the exhaust valve 21 returns to its original position, shielding the front exhaust port 1361.

[0154] Figure 10 is a front view of the face mask according to an embodiment of the present invention, Figure 11 is a rear view of the face mask, Figure 12 is a side view of the face mask, Figure 13 is along Figure 11 a partial cross-sectional view of the face mask cut along line 13-13.

[0155] Referring to Figures 10 to 13 , the face mask 14 constituting the mask device 10 according to an embodiment of the present invention can be fixedly or detachably coupled to the back of the mask body 11 and can be closely attached to the user's face.

[0156] That is, the front portion of the face mask 14 can be closely attached to the back of the rear main body 13, while the back portion of the face mask 14 can be closely attached to the user's face.

[0157] The face shield 14 may be formed in a water droplet shape or a donut shape having a predetermined thickness and an empty central portion. The face shield 14 may be formed with an accommodation space 144 which is formed by penetrating from the front to the back through the central portion of the face shield 14, and the nose or mouth of the user is accommodated inside the accommodation space 144.

[0158] The face shield 14 may be formed in a shape where the width in the left - right direction becomes narrower as it approaches the upper part from the lower part. In addition, the accommodation space 144 is formed in a shape where its width becomes narrower as it approaches the upper part from the lower part. Thus, the mouth of the user can be accommodated in the lower space of the accommodation space 144, and the nose of the user can be accommodated in the upper space of the accommodation space 144. If the user wears the mask device 10, the nose of the user can be fixed and closely attached to the upper part of the face shield 14.

[0159] The face shield 14 may be molded from a stretchable silicon or rubber material, and a breathing space may be formed inside the face shield 14 by closely attaching it to the user's face.

[0160] Specifically, the face shield 14 may include: a coupling part 141 facing the back of the rear main body 13; a close - fitting part 142 closely attached to the user's face; and a connecting part 143 connecting the coupling part 141 and the close - fitting part 142, having a predetermined width in the front - rear direction. The coupling part 141, the close - fitting part 142, and the connecting part 143 may be formed integrally.

[0161] On the other hand, it can also be described as that the face shield 14 includes: a front part closely attached to the back of the rear main body 13; a back part closely attached to the user's face; and a side part connecting the front part and the back part, having a predetermined width in the front - rear direction.

[0162] The coupling part 141 may be formed along the front - end edge of the face shield 14 to have a predetermined width and surround. The coupling part 141 may be formed in an annular shape in a closed loop.

[0163] Magnet mounting parts 1461, 1462, 1463 are provided on the coupling part 141, and magnets 1451, 1452, 1453 that exert an attractive force on the magnets mounted on the front of the rear main body 13 are mounted on the magnet mounting parts 1461, 1462, 1463.

[0164] The magnet mounting parts 1461, 1462, 1463 protrude forward from the coupling part 141, and the magnets 1451, 1452, 1453 may be inserted and mounted inside the magnet mounting parts 146. The magnet mounting parts 1461, 1462, 1463 may be formed in plural.

[0165] Specifically, the magnetic body mounting portions 1461, 1462, and 1463 include: a first magnetic body mounting portion 1461 disposed above the coupling portion 141; and a second magnetic body mounting portion 1462 and a third magnetic body mounting portion 1463 disposed below the coupling portion 141 and spaced apart from each other on both sides.

[0166] At this time, the shapes of the first magnetic body mounting portion 1461, the second magnetic body mounting portion 1462, and the third magnetic body mounting portion 1463 may be the same.

[0167] However, in this embodiment, the first magnetic body mounting portion 1461 may be disposed long in the lateral direction, and the second magnetic body mounting portion 1462 and the third magnetic body mounting portion 1463 may be disposed long in the vertical direction. That is, since the first magnetic body mounting portion 1461 to the third magnetic body mounting portion 1463 have the same form or structure, hereinafter, the first magnetic body mounting portion 1461 will be described as a representative.

[0168] The first magnetic body mounting portion 1461 may be disposed at the center of the upper end of the coupling portion 141, and the second magnetic body mounting portion 1462 and the third magnetic body mounting portion 1463 may be disposed at positions spaced apart from the center of the lower end of the coupling portion 141 on both sides.

[0169] In addition, a first magnetic body 1451 is mounted inside the first magnetic body mounting portion 1461, a second magnetic body 1452 is mounted inside the second magnetic body mounting portion 1461, and a third magnetic body 1453 is mounted inside the third magnetic body mounting portion 1463.

[0170] According to this configuration, there is an advantage as follows: The face shield 14 can be easily fixed to the back surface of the rear main body 13 only by bringing the first magnetic body 1451 to the third magnetic body 1453 close to the first magnet mounting groove 1311 to the third magnet mounting groove 1313, respectively.

[0171] In particular, according to this embodiment, since one magnetic body 1451 exists in the upper part of the face shield 14 and two magnetic bodies 1452 and 1453 exist in the lower part of the face shield 14, by first coupling the magnetic body 1451 located in the upper part of the face shield 14 to the first magnet mounting groove 1311, the remaining two magnetic bodies 1452 and 1453 can be guided to naturally locate in the second magnet mounting groove 1312 and the third magnet mounting groove 1313.

[0172] Therefore, it is not necessary to align the three magnetic bodies 1451, 1452, and 1453 with the three magnet mounting grooves 1311, 1312, and 1313 respectively, and misalignment is prevented, thus having the advantages of easy and convenient installation of the face shield 14.

[0173] In addition, it also has the following advantages: If the user pulls the face shield 14 with a force greater than the magnetic force when the three magnetic bodies 1451, 1452, and 1453 are respectively in an attached state due to the magnetic force, the face shield 14 is easily separated from the rear main body 13.

[0174] On the other hand, a separating protrusion 147 is formed on the face shield 14. The separating protrusion 147 protrudes from the outer surface of the face shield 14 and keeps at least a part of the connecting portion 143 separated from the filter cover 342.

[0175] One or a plurality of the separating protrusions 147 may protrude from the outer surface of the connecting portion 143. The separating protrusion 147 may be formed to protrude or have a curvature. The separating protrusion 147 may be disposed within the area of the filter cover 343.

[0176] In addition, the separating protrusion 147 may be formed long in the front-rear direction on the outer surface of the connecting portion 143. The length of the separating protrusion 147 may correspond to the width (front-rear direction) of the connecting portion 143 where the separating protrusion 147 is located.

[0177] A plurality of the separating protrusions 147 may be formed at intervals. The plurality of separating protrusions 147 may be respectively formed on the left side surface and the right side surface of the connecting portion 143. The plurality of separating protrusions 147 may be configured to be symmetric about a vertical line passing through the center of the face shield 14.

[0178] Specifically, the separating protrusion 147 may include: a first protrusion 1471 formed at a lower position on the left side surface of the connecting portion 143; a second protrusion 1472 formed above the first protrusion 1471; and a third protrusion 1473 formed above the second protrusion 1472.

[0179] The first protrusion 1471 to the third protrusion 1473 may be arranged at intervals in the up-down direction. The first protrusion 1471 to the third protrusion 1473 may be configured to be parallel to each other.

[0180] In addition, the first protrusion 1471 to the third protrusion 1473 may extend long in the front-rear direction on the side surface of the connecting portion 143. At this time, the first protrusion 1471 to the third protrusion 1473 may be formed such that their lengths correspond to the width (front-rear direction) of the connecting portion 143.

[0181] As Figure 12 shown, the connecting portion 143 may be formed such that the width in the front - rear direction increases from the lower part to the upper part. Thus, the third protrusion 1473 located at the upper part of the connecting portion 143 may be formed longer than the first protrusion 1471 located at the lower part of the connecting portion 143.

[0182] In addition, the first protrusion 1471 to the third protrusion 1473 may be disposed within the area of the filter cover 342. This is because, when the user wears the mask device 10, it is to prevent a part of the face shield 14 from covering the suction port, that is, the suction grille 343, as the face shield 14 is pressed.

[0183] That is, even if the face shield 14 is pressed by an external force, the first protrusion 1471 to the third protrusion 1473 can keep the face shield 14 in a state separated from the filter cover 342.

[0184] In this embodiment, the first protrusion 1471 is located at a position corresponding to the lower end of the filter cover 342, the second protrusion 1472 is located at a position corresponding to the central part of the filter cover 342, and the third protrusion 1473 is located at a position corresponding to the upper end of the filter cover 342.

[0185] In the portion of the face shield 14 that is in close contact with the user's face, through - holes 1481 and 1482 for ventilation may be formed. A plurality of the through - holes 1481 and 1482 may be formed along the periphery of the close - contact portion 142. The through - holes 1481 and 1482 may have a circular or non - circular cross - section.

[0186] If the user wears the mask device 10, the close - contact portion 142 of the face shield 14 closely adheres to and is fixed to the user's face. At this time, in the case of wearing the mask device 10 for a long time, sweat or contaminants may accumulate on the user's face. Therefore, by forming a plurality of through - holes 1481 and 1482 in the close - contact portion 142 of the face shield 14, ventilation for the user's face can be provided.

[0187] Next, with reference to the drawings, the structure in which the face shield is coupled to the rear main body will be described in detail.

[0188] Figure 14 is a diagram that magnifies and shows part “A” of Figure 13 and is a perspective view of the magnet of an embodiment of the present invention, Figure 15 is a side view of the magnet, Figure 16 is a longitudinal sectional view of the magnet mounting portion to which the magnet is coupled. Figure 17 ​

[0189] Reference Figures 14 to 17 As described above, the magnetic bodies 1451 to 1453 can be inserted into the respective magnetic body mounting portions 1461 to 1463 of the face shield 14 in a separable manner.

[0190] The respective magnetic body mounting portions 1461 to 1463 and the respective magnetic bodies 1451 to 1453 have the same form or structure as each other. Therefore, hereinafter, the first magnetic body mounting portion 1461 and the first magnetic body 1451 will be described as representatives.

[0191] The first magnetic body mounting portion 1461 includes: a mounting portion main body 1461a that protrudes forward from the outer surface of the coupling portion 141; an insertion guide rib 1461b provided inside the mounting portion main body 1461a; and an insertion hole 1461c formed between the mounting portion main body 1461a and the insertion guide rib 1461b.

[0192] The mounting portion main body 1461a can protrude in a hollow form at the upper central portion of the coupling portion 141. The mounting portion main body 1461a can be formed into a shape that allows the first magnetic body 1451 to be inserted therein. As an example, the mounting portion main body 1461a can be a quadrilateral shape and can be a shape with openings at the front and back.

[0193] The insertion guide rib 1461b functions to guide the insertion position of the first magnetic body 1451 and stably support the first magnetic body 1451 so as not to shake. The first magnetic body 1451 guided by the insertion guide rib 1461b in terms of the insertion position can be inserted into the insertion hole 1461c.

[0194] Specifically, the insertion guide rib 1461b is formed in a "U" shape and is disposed at the inner center of the mounting portion main body 1461a. As a result, a first insertion hole 1461c is formed between the inner peripheral surface of the mounting portion main body 1461a and the left end portion of the insertion guide rib 1461b, and a second insertion hole 1461c is formed between the inner peripheral surface of the mounting portion main body 1461a and the right end portion of the insertion guide rib 1461b.

[0195] That is, a plurality of the insertion holes 1461c are provided, and both end portions of the first magnetic body 1451 can be inserted into the plurality of insertion holes 1461c. If the first magnetic body 1451 is coupled to the mounting portion main body 1461a, the fixing hook 1451d of the first magnetic body 1451 can be snap-fixed in the insertion hole 1461c.

[0196] On the other hand, the first magnetic body 1451 is formed of a magnetic material, for example, iron or stainless steel. The first magnetic body 1451 can be formed in a "U" shape or a "匚" shape.

[0197] In detail, the first magnetic body 1451 includes: a magnetic body 1451a forming a main body; and fixing hooks 1451d extending rearward from both ends of the magnetic body 1451a and inserted into the plurality of insertion holes 1461c.

[0198] The magnetic body 1451a may be formed in a rectangular plate shape. For example, the magnetic body 1451a may be formed in a rectangular plate having a thickness in the front-to-back direction and a length in the left-to-right direction. In this case, the fixing hooks 1451d may be formed by extending rearward from the left and right ends of the magnetic body 1451a, respectively.

[0199] Specifically, the fixing hook 1451d includes an extension portion 1451b extending rearward from the center of both ends of the magnetic body 1451a by a predetermined length, and a hook portion 1451c formed in a hook shape at the end of the extension portion 1451b. The hook portion 1451c may be formed so that the radius increases in the vertical direction at the end of the extension portion 1451b.

[0200] At this time, a vertical height H3 of the hook portion 1451 c is smaller than a vertical height H1 of the magnetic body 1451 a and is larger than a vertical height H2 of the extending portion 1451 b.

[0201] Furthermore, the vertical height H2 of the extension portion 1451b is slightly smaller than the vertical height H4 of the insertion slit 1461d formed in the mounting portion body 1461a. Furthermore, the vertical height H3 of the hook portion 1451c is greater than the vertical height H4 of the insertion slit 1461d and smaller than the vertical height H5 of the insertion hole 1461c of the mounting portion body 1461a.

[0202] Here, since the magnetic body mounting portion 1461 is molded from elastic silicon or rubber material, the fixing hook 1451d can be inserted into the insertion hole 1461c of the mounting portion main body 1461a in an interference fit manner.

[0203] In this way, if Figure 17 As shown, the hook portion 1451c is prevented from being disengaged to the outside through the insertion slit 1461d when accommodated in the insertion hole 1461c.

[0204] Figure 18It is a transverse sectional view showing the state where the magnet mounting portion of the rear main body and the magnetic body mounting portion of the face shield are combined.

[0205] As described above, an upper magnet mounting portion 134 and a pair of lower magnet mounting portions 135 are formed on the front surface of the rear main body 13, and magnet mounting grooves 1314 are respectively formed at positions on the back surface of the rear main body 13 corresponding to the front and back surfaces of the upper magnet mounting portion 134 and at positions on the back surface of the rear main body 13 corresponding to the front and back surfaces of the pair of lower magnet mounting portions 135.

[0206] The magnet mounting groove 1314 includes: a first magnet mounting groove 1311 formed on the front and back surfaces of the upper magnet mounting portion 134; and a second magnet mounting groove 1312 and a third magnet mounting groove 1313 formed on the front and back surfaces of the lower magnet mounting portion 134.

[0207] The three magnetic bodies 1451 to 1453 mounted on the face shield 14 are respectively attached to the first magnet mounting groove 1311 to the third magnet mounting groove 1313 by magnetic force. In addition, if the user pulls the face shield 14 with a force greater than the magnetic force, the face shield 14 can be easily separated from the rear main body 13.

[0208] On the other hand, the upper magnet mounting portion 134 and the pair of magnet mounting portions 135 are different only in position and have the same shape or structure as each other. Therefore, the method of combining the first magnetic body mounting portion 1461 with the upper magnet mounting portion 134 will be described below as a representative.

[0209] Refer to Figure 18 , the upper magnet mounting portion 134 includes: a magnet mounting portion main body 1341, and the magnet mounting portion main body 1341 forms a placement space 1343 for placing the magnet 25.

[0210] The magnet mounting portion main body 1341 protrudes forward from the front surface of the rear main body 13 and has a shape in which a part of the front surface is recessed backward to form the placement space 1343.

[0211] In addition, a pair of first guiding ribs 1342 may be formed on both sides of the front surface of the magnet mounting portion main body 1341, and the pair of first guiding ribs 1342 are used to hold both ends of the magnet 25 inserted into the placement space 1343. The pair of first guiding ribs 1342 may protrude forward from a portion of the front surface of the magnet mounting portion main body 1341 corresponding to the edge of the placement space 1343.

[0212] Through the structure of the pair of first guiding ribs 1342, the magnet 25 can be deeply inserted into the placement space 1343 and be stably supported.

[0213] In addition, a pair of second guide ribs 1344 may be formed on both sides of the back surface of the magnet mounting portion main body 1341. The pair of second guide ribs 1344 are used to hold both ends of the first magnetic body mounting portion 1461 inserted into the magnet mounting groove 1314. The pair of second guide ribs 1344 may protrude rearward from a portion of the back surface of the magnet mounting portion main body 1341 corresponding to the edge of the magnet mounting groove 1314.

[0214] With the structure of the pair of second guide ribs 1344, the first magnetic body mounting portion 1461 can be deeply inserted into the magnet mounting groove 1314 and stably supported.

[0215] If the first magnetic body mounting portion 1461 is inserted into the magnet mounting groove 1314, the first magnetic body 1451 faces the magnet 25, and as the distance between the first magnetic body 1451 and the magnet 25 becomes closer, the first magnetic body mounting portion 1461 and the upper magnet mounting portion 134 may be combined by magnetic force.

[0216] Therefore, it has the advantages of facilitating the loading and unloading of the face shield 14 onto and from the rear main body 13, and preventing the face shield 14 from being easily separated from the rear main body 13.

Claims

1. A mask device, wherein, Comprising: A mask body, including a rear body and a front body combined with the front of the rear body, forming an inhalation port and an exhalation port; A face shield, magnetically combined on the back of the rear body, closely attached to the user's face, and having a breathing space formed inside the face shield; And An air purification module, installed on the rear body, purifying the external air flowing into the inhalation port and supplying it to the breathing space; The face shield includes: A coupling part, facing the back of the rear body, provided with a magnetic body; A close - fitting part, closely attached to the user's face; and A connecting part, formed to connect the coupling part and the close - fitting part, having a specified width in the front - rear direction; The magnetic body includes: A first magnetic body, disposed at the center of the upper end of the front surface of the coupling part; and A second magnetic body and a third magnetic body, disposed to be separated from each other to both sides with the center of the lower end of the front surface of the coupling part as a reference; The inhalation port is formed at a portion of the back surface of the rear body corresponding to the outer side of the face shield, The exhalation port is formed at a portion of the back surface of the rear body corresponding to the inner side of the face shield, The air flowing in through the inhalation port flows through the inside of the rear body and then flows through the exhalation port into the breathing space.

2. The mask device according to claim 1, wherein, The first magnetic body is located at a portion of the face shield corresponding to the upper side of the air purification module, The second magnetic body and the third magnetic body are located at a portion of the face shield corresponding to the lower side of the air purification module.

3. The mask device according to claim 1, wherein, The first magnetic body is located at a portion of the face shield corresponding to the upper side of the exhalation port, The second magnetic body and the third magnetic body are located at a portion of the face shield corresponding to the lower side of the exhalation port.

4. The mask device according to claim 1, wherein, The first magnetic body to the third magnetic body are respectively inserted into the inside of a plurality of magnetic body mounting parts provided on the face shield.

5. The mask device according to claim 4, wherein, A plurality of the magnetic body mounting parts protrude from the front surface of the coupling part respectively and are attached to the back surface of the rear body.

6. The mask device according to claim 5, wherein, A magnet mounting part protrudes from the front surface of the rear body, and a magnet is mounted on the magnet mounting part, A magnet mounting groove for attaching the magnetic body mounting part is formed at a portion of the back surface of the rear body corresponding to the front and back of the magnet mounting part.

7. The mask device according to claim 4, wherein, The magnetic body mounting part includes: A mounting part main body, protruding forward from the outer surface of the coupling part; and An insertion guiding rib, formed inside the mounting part main body; The magnetic body is inserted into the inside of the mounting part main body through an insertion hole formed between the mounting part main body and the insertion guiding rib.

8. The mask device according to claim 7, wherein, The mounting part main body forms an inner space with an open front surface for accommodating the magnetic body.

9. The mask device according to claim 8, wherein, The magnetic body is detachably coupled to the mounting portion main body through the open front surface of the mounting portion main body.

Images