Mask device

Abstract

The mask device of an embodiment of the present invention includes: a mask body, including a rear body and a front body connected to the front side of the rear body, forming an inlet and an outlet; a face shield, which is magnetically connected to the back side of the rear body and is in close contact with the user's face, and a breathing space is formed on the inner side of the face shield; and an air purification module, which is installed on the rear body to purify the external air flowing into the inlet and supply it to the breathing space; the face shield includes: a coupling portion, which faces the back side of the rear body and is provided with a magnetic body mounting portion; a close contact portion, which is in close contact with the user's face; and a connecting portion, which is formed to connect the coupling portion and the close contact portion, and has a specified width in the front-to-back direction; the magnetic body mounting portion includes: a mounting portion body, which protrudes forward from the outer surface of the coupling portion; an insertion guide rib, which is formed on the inner side of the mounting portion body; and a magnetic body, which is inserted into the inner side of the mounting portion body through an insertion hole formed between the mounting portion body and the insertion guide rib.

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 emitted by the user when exhaling 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 the spread of 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 out before flowing into the respiratory organs of the user.

[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 for changing 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 of the masks currently launched and disclosed in the market have the following structure: an air inlet is formed on the front of the mask, and an air outlet is formed on the back of the mask, specifically, on the back of the mask at a position close to the user's mouth or nose. Here, the front of the mask refers to the part exposed to the outside, and the back of the mask refers to the part that is in close contact with the user's face.

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

[0010] In the structure in which the air inlet is formed on the front side of the mask and the air outlet is formed on the back side of the mask as described above, external air flows into the interior of the mask and is exhaled to the user's respiratory organs through the air outlet after passing through the fan and the filter. During this process, there is a problem of excessive air flow conversion.

[0011] As the number of flow changes of the sucked 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 that the power consumption of the battery that supplies power to the fan increases.

[0012] Furthermore, as the number of flow transitions of the sucked air increases, there is also a problem of increased flow noise.

[0013] In addition, users who wear masks with an air inlet on the front of the mask often place the mask with the air inlet facing upward or forward after taking it off. Therefore, there is a disadvantage that dust is relatively likely to flow in through the air inlet.

[0014] In addition, when the air inlet is arranged on the front side of the mask, it may give an impression of unsightly appearance 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, the inlet cover may be separated from the mask or damaged due to force or impact applied 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, 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 is significantly increased during the time when the air sucked 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 made in order to improve the above-mentioned problems.

[0019] The mask device of an embodiment of the present invention includes: a mask body, including a rear body and a front body connected to the front side of the rear body, forming an inlet and an outlet; a face shield, which is magnetically connected to the back side of the rear body and tightly adheres to the user's face, forming a breathing space on the inner side of the face shield; and an air purification module, which is installed on the rear body, purifies the external air flowing into the inlet and supplies it to the breathing space.

[0020] In particular, the face shield includes: a coupling portion, which faces the back side of the rear body and is provided with a magnetic mounting portion; a close-fitting portion, which is close to the user's face; and a connecting portion, which is formed to connect the coupling portion and the close-fitting portion and has a specified width in the front-to-back direction; the magnetic mounting portion includes: a mounting portion body, which protrudes forward from the outer surface of the coupling portion; an insertion guide rib, which is formed on the inner side of the mounting portion body; and a magnetic body, which is inserted into the inner side of the mounting portion body through an insertion hole formed between the mounting portion body and the insertion guide rib.

[0021] The mounting portion body is formed with an inner space with an opening on the front side for accommodating the magnetic body. At this time, the magnetic body can be detachably coupled to the mounting portion body through the opening on the front side of the mounting portion body.

[0022] The insertion guide rib is arranged at the inner center of the mounting portion body, and both ends are bent backward. At this time, both ends of the magnetic body can be inserted into the space between both ends of the insertion guide rib and the mounting portion body.

[0023] The magnetic body includes: a magnetic body covering the front side of the mounting portion body; and a pair of fixing hooks extending rearward from both ends of the magnetic body and inserted into the insertion hole.

[0024] The fixing hook includes: an extension portion extending rearward from the end of the magnetic body; and a hook portion extending from the end of the extension portion in an up-down direction and in a hook shape. The fixing hook can be inserted into the inner side of the mounting body in an interference fit manner.

[0025] A magnet mounting portion may be protrudingly formed on the front surface of the rear body, and a magnet may be mounted on the magnet mounting portion. A magnet mounting groove for attaching the magnetic mounting portion may be formed on the back surface of the rear body at a position corresponding to the front and back surfaces of the magnet mounting portion.

[0026] The magnetic body mounting portion may include: a first magnetic body mounting portion, which is arranged at the center of the upper end of the front side of the coupling portion; and a second magnetic body mounting portion and a third magnetic body mounting portion, which are respectively arranged to be spaced apart on both sides based on the center of the lower end of the front side of the coupling portion.

[0027] The first magnetic body mounting portion may be located at a portion of the face shield corresponding to an upper side of the air purification module, and the second magnetic body mounting portion and the third magnetic body mounting portion may be located at a portion of the face shield corresponding to a lower side of the air purification module.

[0028] In addition, the first magnetic body mounting portion may be located at a portion of the face shield corresponding to an upper side of the discharge port, and the second magnetic body mounting portion and the third magnetic body mounting portion may be located at a portion of the face shield corresponding to a lower side of the discharge port.

[0029] The inlet port may be located outside the breathing space, and the outlet port may be located inside the breathing space.

[0030] The air purification module may include: a filter disposed in front of the suction port; and a filter cover mounted on the rear body to cover the filter.

[0031] The mask device according to the embodiment of the present invention as described above has the following effects.

[0032] 1. The inlet and outlet of the mask device are both formed on the back of the mask body covering 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 the effect of significantly reducing the flow resistance.

[0033] Second, when the user wears the mask device, the inlet will not be exposed to the outside, so there is no need for a separate cover member for covering the inlet. Furthermore, since there is no need to install a separate cover member on the front of the mask device, there is no effect that the cover member will be damaged or separated due to external force.

[0034] 3. Since the suction port is formed on the back of the mask body, the advantage is that when the mask device is taken off and the front of the mask body faces forward or upward, the phenomenon of dust or other foreign matter flowing into the interior of the mask device through the suction port can be minimized.

[0035] Fourth, since the face shield can be combined with the mask body by magnetic force without the need for an additional fastening structure, the face shield has the advantage of being easy to install and separate.

[0036] In particular, since a magnetic mounting portion is provided at the center of the upper portion of the face shield and two magnetic mounting portions are provided at the lower portion of the face shield, as long as the magnetic mounting portion located at the upper portion of the face shield is first attached to the mask body, the connection positions of the remaining two magnetic mounting portions can be located.

[0037] Therefore, there is no need to align the plurality of magnetic mounting parts with the corresponding positions of the mask body, eliminating the possibility of incorrect connection, thereby having the advantage of facilitating the installation and separation of the face shield.

[0038] Fifth, since the magnetic body is smoothly inserted through the insertion guide rib formed on the inner side of the magnetic body mounting portion, there is an advantage that the magnetic body can be easily mounted and removed.

[0039] 6. The magnetic body is composed of a magnetic body and a pair of fixing hooks extending backward from both ends of the magnetic body, and the fixing hooks are inserted into the inner side of the mounting body in an interference fit manner, thereby having the advantage of preventing the magnetic body from being separated from the magnetic body mounting part. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 2 is a front view of a mask device according to an embodiment of the present invention.

[0041] Figure 2 It is a back perspective view of the mask device.

[0042] Figure 3 It is an exploded stereogram of the mask device.

[0043] Figure 4 It is a front perspective view of the mask device with the front body separated.

[0044] Figure 5 1 is a back perspective view of a front body of a mask device according to an embodiment of the present invention.

[0045] Figure 6 1 is a front perspective view of a rear body of the mask device according to an embodiment of the present invention.

[0046] Figure 7 It is a rear perspective view of the rear body.

[0047] Figure 8 2 is a transverse cross-sectional view of a mask device according to an embodiment of the present invention.

[0048] Fig. 9 is a longitudinal cross-sectional view of the mask device.

[0049] Fig.10 It is a front view of the face shield according to an embodiment of the present invention.

[0050] Fig.11 It is a rear view of the face shield.

[0051] Fig.12 It is a side view of the face shield.

[0052] Fig.13 is along Fig.11 A partial cross-sectional view of the face shield cut along line 13-13.

[0053] Fig.14 Yes Fig.13 The "A" portion is enlarged and shown in FIG.

[0054] Fig.15 It is a three-dimensional diagram of a magnetic body according to an embodiment of the present invention.

[0055] Fig.16 is a side view of the magnetic body.

[0056] Fig.17 It is a longitudinal cross-sectional view of a magnetic body mounting portion combined with the magnetic body.

[0057] Fig.18 It is a transverse cross-sectional view showing a state in which the magnet mounting portion of the rear body and the magnetic body mounting portion of the face shield are coupled. DETAILED DESCRIPTION

[0058] Figure 1 2 is a front view of a mask device according to an embodiment of the present invention, Figure 2 is a back perspective view of the mask device, Figure 3 is an exploded perspective view of the mask device, Figure 4 It is a front perspective view of the mask device with the front body separated.

[0059] Reference Figures 1 to 4 The mask device 10 of the embodiment of the present invention includes: a mask body 11; a face shield 14, which is fixedly or detachably coupled to the back of the mask body 11; and an air purification module 30, which is installed inside the mask body 11.

[0060] In detail, the mask body 11 includes: a front body 12, which forms a front shape; and a rear body 13, which is combined with the back of the front body 12 to form a 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).

[0061] In addition, the face shield 14 is combined with the back of the rear body 13 and is closely attached to the user's face, and can be formed of a resilient silicone or rubber material. A breathing space is formed inside the face shield 14, and if the user wears the mask device 10, the user's nose and mouth are accommodated in the breathing space. Therefore, the purified external air passing through the air purification module 30 is guided to the breathing space, so that it is inhaled by the user, and the air generated when the user exhales is also discharged to the breathing space.

[0062] A predetermined space is formed between the front body 12 and the rear body 13. Figure 4 As shown, various electrical components are installed on the front of the rear body 13. In addition, the various electrical components are shielded by the front body 12 and are not exposed to the outside.

[0063] In addition, the air purification module 30 includes: a fan module 31, which is placed in the receiving portion 133 formed in the rear body 13 (refer to Figure 6 and a filter 33, placed behind the fan module 31. The fan module 31 includes a centrifugal fan that inhales air axially and discharges it radially.

[0064] The air purification module 30 further includes a filter cover 34 placed behind the filter 33, and a suction port for inhaling external air is formed in the filter cover 34. The filter cover 34 can be rotatably coupled to the rear body 13, and as shown in the figure, the suction port can be provided in the form of a suction grille 343.

[0065] 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. The filter cover 342 includes the suction grille 343 therein.

[0066] It can be understood that the suction grille 343 is a structure composed of a plurality of suction slits 3431 and a plurality of dividing 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 elongated suction slits 3431 by a plurality of the dividing ribs 3432. In addition, the plurality of elongated suction slits 3431 can be divided into an upper slit and a lower slit by a reinforcing rib 3422. It should be clarified that, hereinafter, the suction port formed on the back of the mask device 10 for inhaling external air is defined as including 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 as having the same meaning.

[0067] In addition, a discharge port 101 is formed at a position spaced apart from the suction port toward the center direction of the rear body 13. With the operation of the fan module 31, the external air sucked through the suction port or the suction grille 343 passes through the filter 33 and the fan module 31 in sequence, and then is discharged into the breathing space through the discharge port 101.

[0068] The inlet, i.e., the inlet grille 343, is disposed on the outside of the face shield 14, and the outlet 101 is disposed on the inside of the face shield 14. That is, the inlet grille 343 is located on the outside of the breathing space, and the outlet 101 is located on the inside of the breathing space, so that the inhaled external air and the air exhaled by the user are not mixed with each other.

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

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

[0071] In detail, the main control module 15 is a module for controlling the operation of the fan module 31 , the speaker module 19 , and a pressure sensor and a microphone described later. The main control module 15 may be disposed at the upper center of the front of the rear body 13 .

[0072] The power module 16 is a control module for supplying power to the electrical components installed in the mask device 10. The power module 16 may be disposed at the lower right end of the front side of the rear body 13.

[0073] The power module 16 may be equipped with a cable connector, into which a terminal of a cable for supplying power and transmitting data is inserted, and an LED module for notifying 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 to irradiate the outside of the mask device 10.

[0074] The wireless communication module 17 may be any one of various forms of short-range wireless communication modules including Bluetooth. The wireless communication module 17 may be arranged at the lower left end of the front side of the rear body 13. The wireless communication module 17 may be installed on the front side of the rear body 13 in a direction intersecting the rear body 13, for example, horizontally. The wireless communication module 17 may be installed on the front side of the rear body 13 in a horizontal state by means of a pair of substrate insertion ribs 1315 protruding from the front side of the rear body 13. Both side ends of the wireless communication module 17 are supported by the pair of substrate insertion ribs 1315.

[0075] The speaker module 19 may be disposed at a lower left end of the front side of the rear body 13 corresponding to a lower side of the wireless communication module 17 .

[0076] The battery 20 may be disposed at the center of the front face of the rear body 13, and the exhaust valve 21 may be disposed to shield an exhaust port formed at the lower side of the center of the front face 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.

[0077] Here, it should be understood that the front, back, left and right sides of the mask body 11 are defined based on the state in which the user wears the mask device 10 .

[0078] Figure 5 1 is a back perspective view of a front body of a mask device according to an embodiment of the present invention.

[0079] Reference Figure 5 The front body 12 of the mask device 10 of the embodiment of the present invention forms the front appearance of the mask device 10 .

[0080] The front surface of the front body 12 is flatly formed as a single body without installing additional components, which has the advantage of looking neat in appearance. In the case where the air inlets are formed on the left and right sides of the front body 12, there is a disadvantage that if the mask device 10 is removed and placed with the air inlets facing upward, there is a high possibility that foreign matter flows into the mask device 10 through the air inlets.

[0081] Furthermore, in the case where an additional cover is installed to minimize the inflow of foreign matter by shielding the suction port, a gap needs to be formed between the edge of the cover and the front surface of the front body 12 so that external air can flow in. That is, there is a restriction that the additional cover needs to be combined with the front surface of the front body 12 to protrude from the front surface of the front body 12.

[0082] As a result, the additional cover is likely to be damaged by external force or to hit a peripheral obstacle and be separated from the front body 12. For this reason, it is designed that the suction port for sucking in external air is not formed in the front body 12 as much as possible to prevent protrusion caused by installing an additional component on the front side of the front body 12, which is not only beneficial to the appearance but also to ensure durability.

[0083] In view of this aspect, the front of the front body 12 of the embodiment of the present invention not only has no inlet for inhaling external air, but also has no additional components including a cover installed, so that the front 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 one side of the lower part.

[0084] On the other hand, a plurality of protrusion structures are formed on the back side of the front body 12 .

[0085] In detail, one or more substrate fixing ribs 125 are protruded from the upper end of the center of the back side of the front body 12. If the edge of the front body 12 is combined with the front edge of the rear body 13, the one or more substrate fixing ribs 125 press the front side of the main control module 15 installed on the rear body 13, thereby preventing the main control module 15 from shaking.

[0086] A horizontally protruding valve support rib 121 is formed on the back of the front body 12. When the front body 12 is combined with the rear 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 side of the exhaust valve 21. As an example, the valve support rib 121 may extend backward by a predetermined length with a predetermined width from a position spaced a predetermined distance downward from the center of the back of the front body 12.

[0087] In addition, a pair of magnet pressing ribs 126 protrude from the back of the front body 12. Specifically, the face shield 14 is mounted on the back of the rear body 13, a magnet is mounted on the front of the face shield 14, and a magnet that generates attraction with the magnet is also mounted on the front of the rear body 13. As a result, the face shield 14 is detachably mounted on the back of the rear body 13 by the magnetic force of the magnet.

[0088] At this time, a pair of lower magnet mounting portions 135 for mounting the magnets are formed on the front surface of the rear body 13 (see Figure 6 ) In addition, the pair of magnet pressing ribs 126 play a function of pressing the pair of magnets mounted on the pair of lower magnet mounting parts 135 respectively.

[0089] In addition, a substrate pressing rib 127 is protruded from the back of the front body 12 to contact the front end of the substrate constituting the wireless communication module 17. In detail, if the front body 12 and the rear body 13 are combined with each other, the substrate pressing rib 127 presses the front end 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.

[0090] In addition, a support rib 122 is formed at a position corresponding to the edge of the speaker hole 123 in the back of the front body 12, and the support rib 122 surrounds and supports the front end edge of the speaker module 19. The support rib 122 may surround in a shape corresponding to the front shape of the speaker module 19.

[0091] In addition, a substrate fixing rib 124 is protruded from the back of the front body 12 to press the front of the power module 16. The substrate fixing rib 124 presses the front of the substrate constituting the power module 16 to prevent the power module 16 from shaking or detaching from the rear body 13.

[0092] Figure 6 2 is a front perspective view of a rear body of a mask device constituting an embodiment of the present invention, Figure 7 It is a rear perspective view of the rear body.

[0093] Reference Figure 6 and Figure 7 The rear body 13 constituting the mask device 10 of the embodiment of the present invention includes: a mask portion 131 covering the face of the user; and a welding portion 132 bent forward from the edge of the mask portion 131.

[0094] In detail, the welded portion 132 is continuously formed along the top edge, both side edges and the bottom edge of the mask portion 131. In addition, the welded portion 132 that is bent along the bottom edge of the mask portion 131 and extends forward has the largest width in the front-rear direction.

[0095] The portion of the welded portion 132 formed at the bottom edge of the mask portion 131 may be particularly defined as an extension step. The extension step is convex and its front-to-back width increases as it approaches the center from both sides of the rear body 13.

[0096] A bottom exhaust port 1362 may be formed at the center of the welded portion 132 defined as an extension platform, and a button hole 1321 may be formed at a position spaced apart from the bottom exhaust port 1362 toward the side end of the rear body 13. A power button is inserted into the button hole 1321. Indicator holes 1322 are formed at positions spaced apart from left and right edges of the button hole 1321, respectively.

[0097] Light irradiated from a light emitting device mounted on the power module 16 is irradiated to the outside through the pair of indicator holes 1322. The light emitting device includes an LED module.

[0098] If light is irradiated to the outside through any one of the pair of indicator holes 1322, it can indicate that the power of the mask device 10 is turned on. In addition, the remaining power of the battery 20 can be predicted based on the color of the light irradiated through the other of the pair of indicator holes 1322.

[0099] A terminal insertion port 1323 is formed at a position further away from the button hole 1321 toward 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 a terminal connector formed on the power module 16. 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 the data transmitted via the USB cable.

[0100] The rear body 13 is formed with a receiving portion 133 for receiving the air purification module 30. The receiving portions 133 are respectively formed on the left and right sides of the center of the rear body 13, and a pair of the receiving portions 133 are symmetrical with respect to a vertical line passing through the center of the rear body 13.

[0101] The accommodating portion 133 protrudes forward from the front side of the mask portion 131 to form a space for accommodating the air purification module 30. The accommodating portion 133 includes: a placement surface 1331 for placing the air purification module 30, specifically the fan module 31; a fastening surface 1335 connected to the outer edge of the placement surface 1331 at the side end of the mask portion 131; and an air guide surface 1334 connected to the front side of the mask portion 131 at the inner edge of the placement surface 1331.

[0102] In addition, the accommodating portion 133 further includes a top surface 1332 connecting the upper ends of the placement surface 1331, the air guide surface 1334, and the fastening surface 1335 to the front surface of the mask portion 131. In addition, the accommodating portion 133 further includes a bottom surface 1333 connecting the lower ends of the placement surface 1331, the air guide surface 1334, and the fastening surface 1335 to the front surface of the mask portion 131.

[0103] One or more fastening devices, such as fastening hooks, are formed on the fastening surface 1335 .

[0104] A fan installation hole 1336 is formed on the installation surface 1331 , and the top surface 1332 and the bottom surface 1333 may extend horizontally and may extend parallel to each other.

[0105] The fastening surface 1335 may protrude with an arc toward the outside of the rear body 13 , and may be formed to be inclined toward the center of the rear body 13 as approaching the placement surface 1331 from the mask portion 131 .

[0106] The air guiding surface 1334 may be designed to protrude and extend from the placement surface 1331 toward the mask portion 131 in an arc, so that the air sucked by the fan module 31 is smoothly guided along the air guiding surface 1334 to the side of the outlet 101 .

[0107] As another example, the air guide surface 1334 may include an arc portion curved at a predetermined curvature at an inner edge of the placement surface 1331 and an inclined portion connected flatly and obliquely to the mask portion 131 from an end of the arc portion.

[0108] 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.

[0109] A battery installation portion 138 may be formed on the front side of the rear body 13. In detail, the battery installation portion 138 includes a pair of battery placement ribs 1381 and a battery support rib 1382.

[0110] A pair of battery placement ribs 1381 protrude forward from the front side of the mask portion 131 or the edge of the air guide surface 1334 and extend in parallel in a vertical direction. The pair of battery placement ribs 1381 support the back side of the battery 20 .

[0111] One end of the battery supporting rib 1382 extends from any one side 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 .

[0112] The battery support ribs 1382 are formed in an "n" shape and support the front and both side surfaces of the battery 20. Therefore, the battery support ribs 1382 can be used to prevent the battery 20 from being separated from the rear body 13.

[0113] In addition, the center portion of the battery support rib 1382 protrudes forward so that batteries of different sizes can be selectively installed.

[0114] In detail, the battery supporting rib 1382 may include a pair of extending portions extending forward from the pair of air guiding surfaces 1334 and a connecting portion extending in a lateral direction to connect the pair of extending portions.

[0115] In addition, a portion of the connecting portion is bent and extended 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. In detail, 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.

[0116] The second battery support portion 1382b may be described as being formed by bending a portion of the connection portion constituting the first battery support portion 1382a forward multiple times. Alternatively, the second battery support portion 1382b, which may be described as being relatively small in size and shaped like an "n", may be formed by protruding from the front of the first battery support portion 1382a, which may be relatively large in size and shaped like an "n".

[0117] An exhaust flow path guide 136 protrudes forward from the front surface of the mask portion 131 corresponding to the lower side of the battery mounting portion 138. In detail, the exhaust flow path guide 136 is formed on the lower side of the battery mounting portion 138 so that the lower end of the battery 20 mounted on the battery mounting portion 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 when inserted into the battery mounting portion 138.

[0118] The exhaust flow path guide 136 may have a substantially tunnel-shaped longitudinal section, and a front exhaust port 1361 may be formed at a portion of the mask portion 131 corresponding to the inner side of the exhaust flow path guide 136 .

[0119] 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 .

[0120] An upper magnet mounting portion 134 is formed at the central upper end of the front surface of the mask portion 131 , and a pair of lower magnet mounting portions 135 are formed at the lower end of the front surface of the mask portion 131 .

[0121] In detail, the lower magnet mounting portion 135 is formed at the left edge and the right edge of the exhaust flow path guide 136. In addition, the magnet mounted on the lower magnet mounting portion 135 is pressed by a pair of magnet pressing ribs 126 protruding from the back side of the front body 12 (see Figure 5 )Press.

[0122] A strap connection part 137 is formed at the left end and the right end of the rear body 13. In detail, the strap connection part 137 is a part for connecting the end of a strap or a band hung on the ear of the user or around the back of the head of the user. The strap connection part 137 is 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, respectively.

[0123] The two ends of any one of the pair of straps can be connected to the strap connection parts 137 arranged at the upper and lower ends of the left side, respectively, while the two ends of the other can be connected to the strap connection parts 137 arranged at the upper and lower ends of the right side, respectively. In this way, the pair of straps can be hung on the two sides of the user's ears, respectively.

[0124] As another method, the two ends of any one of the pair of straps can be connected to the strap connection parts 137 provided at the upper left end and the upper right end, respectively, while the two ends of the other one can be connected to the strap connection parts 137 provided at the lower left end and the lower right end, respectively. In this way, the pair of straps can be wrapped around the back of the user's head.

[0125] Each of the four strap connection parts 137 includes: a strap groove 1373, which is recessed from the front side of the rear body 13 and extends in the transverse direction (the width direction of the rear body); a strap hole 1374, which is formed at any point of the strap groove 1373; a strap rod 1372, which connects the top and bottom surfaces of the strap groove 1373; and a barrel-shaped waterproof rib 1371, which extends from a portion of the back side of the rear body 13 corresponding to the edge of the strap hole 1374.

[0126] On the other hand, a main control module mounting portion 139 is formed on the front side of the rear body 13 .

[0127] In detail, the main control module mounting portion 139 includes: a substrate fixing hook 1391 protruding forward from the front side of the mask portion 131; and a substrate placement rib 1393 and a substrate supporting rib 1392 supporting the back side of the main control module 15.

[0128] In detail, the substrate fixing hooks 1391 may include: a pair of first substrate fixing hooks 1391 a located at the upper side of the receiving portion 133 ; and a pair of second substrate fixing hooks 1391 b located between the pair of facing receiving portions 133 .

[0129] The pair of first substrate fixing hooks 1391a can be disposed at a position spaced upward from the top surface of the left accommodating portion and a position spaced upward from the top surface of the right accommodating portion. The pair of first substrate fixing hooks 1391a are used to fix the left and right ends of the main control module 15.

[0130] In addition, the pair of second substrate fixing hooks 1391b may be respectively located at positions corresponding to the inner upper ends of the pair of the receiving parts 133. In detail, any one of the pair of second substrate fixing hooks 1391b may be formed at a position where the upper side corner of the right receiving part intersects with the front face of the mask part 131. In addition, the other of the pair of second substrate fixing hooks 1391b may be formed at a position where the upper side corner of the left receiving part intersects with the front face of the mask part 131.

[0131] The pair of second substrate fixing hooks 1391 b are used to fix the lower end portion of the control substrate constituting the main control module 15 .

[0132] In addition, the substrate mounting rib 1393 can protrude from the front side of the mask portion 131 at a position corresponding to between a pair of the second substrate fixing hooks 1391b, and can support the back side of the lower end portion of the control substrate constituting the main control module 15.

[0133] In addition, the back side of the upper end of the main control module 15 can be supported by the front end of the upper magnet mounting portion 134. The main control module 15 is separated from the mask portion 131 by the upper magnet mounting portion 134 and the substrate placement ribs 1393, and has the effect of being stably combined with the rear body 13 through the substrate fixing hook 1391 without shaking.

[0134] On the other hand, a pressure sensor mounting portion (or a breathing sensor mounting portion) 130 may be formed in the upper center of the front side of the mask portion 131. The pressure sensor (described later) mounted on the pressure sensor mounting portion 130 senses the pressure inside the breathing space defined inside the face shield 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 clear that the pressure sensor may also be defined as a breathing sensor, and even if the terms are different, it should be understood as a sensor that performs the same function.

[0135] The pressure sensor mounting portion 130 is provided on the front side of the rear body 13. If the main control module 15 is mounted to the main control module mounting portion 139, the pressure sensor mounting portion 130 will be located at the position where the pressure sensor (or breathing sensor) mounted on the back side of the main control module 15 is located. Therefore, if the main control module 15 is mounted to the main control module mounting portion 139, the pressure sensor is accommodated in the pressure sensor mounting portion 130. In addition, the front end portion of the pressure sensor mounting portion 130 is closely attached to the back side of the control substrate of the main control module 15.

[0136] In addition, the portion defining the bottom of the pressure sensor mounting portion 130 protrudes toward the rear of the rear body 13, and a through hole 1301 is formed on the bottom surface of the portion protruding toward the rear. Through the through hole 1301, the breathing space defined by the back of the rear body 13 and the face shield 14 is connected to the internal space of the pressure sensor mounting portion 130. As a result, a portion 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 the microcomputer (described later) of the main control module 15, thereby determining the user's breathing state.

[0137] On the other hand, magnet mounting grooves 1314 are respectively formed at positions on the back side of the rear body 13 corresponding to the front and back sides of the upper magnet mounting portion 134 and at positions on the back side of the rear body 13 corresponding to the front and back sides of the pair of lower magnet mounting portions 135.

[0138] The magnet mounting groove 1314 includes: a first magnet mounting groove 1311 formed on the front and back sides 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 sides of the lower magnet mounting portion 135 .

[0139] Under the action of magnetic force, the three magnets installed on the face shield 14 are respectively attached to the first magnet installation groove 1311 to the third magnet installation 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 body 13.

[0140] On the other hand, as described above, a fan mounting hole 1336 may be formed on the placement surface 1331 constituting the accommodation portion 133. In addition, one or more flow guide 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 32 is fixed to the accommodation portion 133 by means of a fastening member penetrating the flow guide fastening hole 1331a.

[0141] In addition, the flow guide hook 1339 and the filter hook 1338 are respectively formed to be spaced apart in the front-rear direction on the fastening surface 1335 constituting the accommodating portion 133. The flow guide hook 1339 is located closer to the installation surface 1331 than the filter hook 1338.

[0142] In addition, a locking groove 1337 is formed at the rear side end of the rear body 13 corresponding to the rear of the filter hook 1338. In detail, the locking groove 1337 may be formed at a position where the welding portion 132 and the fastening surface 1335 intersect.

[0143] Figure 8 is a transverse cross-sectional view of a mask device according to an embodiment of the present invention, Fig. 9 is a longitudinal cross-sectional view of the mask device.

[0144] Reference Figure 8 and Fig. 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 of the mask device 10 .

[0145] The external air flowing in through the suction grille 343 is purified when passing through the filter 33. In addition, the air passing through the filter 33 is sucked in the axial direction of the fan module 31 and then discharged in the radial direction.

[0146] like Figure 8 As shown, the front side of the fan module 31 is placed on the placement surface 1331, and the back side of the fan module 31 is open. In addition, the open back side of the fan module 31 is shielded by the flow guide 32, and a communication hole serving as a suction port of the fan module 31 is formed in the flow guide 32. The air passing through the filter 33 flows into the inside of the fan through the communication hole.

[0147] In addition, the 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.

[0148] In addition, the discharge port 101 is located in the breathing space defined by the face shield 14 and the back surface of the rear body 13. Therefore, the external air sucked in by the fan module 31 is discharged to the breathing space so that the user can inhale.

[0149] In addition, the air guide surface 1334 is smoothly formed with an arc from the outlet of the fan module 31 toward the outlet 101 , so that the flow direction of the air discharged along the radial direction of the fan module 31 does not change sharply when flowing toward the outlet 101 .

[0150] In detail, in the case of a centrifugal fan, the air is sucked in the axial direction and discharged in the radial direction due to the shape of the hub in the shape of a cone or a truncated cone. That is, the flow direction of the air sucked in the axial direction of the centrifugal fan is smoothly changed by 90 degrees along the curved surface of the hub.

[0151] Here, since the direction of the arc of the hub constituting the fan module 31 and the direction of the arc of the air guide surface 1334 are the same, the air sucked into the fan module 31 is smoothly converted to flow in only one direction.

[0152] If the suction grille 343 is formed on the front body 12, the suction port of the fan module 31 faces the front body 12, and as a result, the arc direction of the hub constituting the fan module is opposite to the arc direction of the air guide surface 1334. As a result, the air discharged from the fan module 31 collides with the starting portion of the air guide surface 1334 corresponding to the inlet of the air passage 102, thereby generating flow resistance and flow noise.

[0153] That is, the air sucked in the axial direction of the fan module 31 substantially forms an “S”-shaped flow, thereby generating more flow loss compared to the structure of the present invention that forms a “C” or “n”-shaped flow.

[0154] On the other hand, the air discharged through the mouth and nose of the user when the user exhales gathers in the breathing space. In addition, a small part of the air gathered in the breathing space flows into the inside of the pressure sensor mounting part 130 through the through hole 1301.

[0155] In addition, most of the air gathered in the breathing space falls 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 when the user exhales, the exhaust valve 21 bends forward to open 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, thereby covering the front exhaust port 1361.

[0156] Fig.10 1 is a front view of a face shield according to an embodiment of the present invention, Fig.11 is a rear view of the face shield, Fig.12 is a side view of the face shield, Fig.13 is along Fig.11 A partial cross-sectional view of the face shield cut along line 13-13.

[0157] Reference Figures 10 to 13The face shield 14 constituting the mask device 10 of the embodiment of the present invention can be fixedly or detachably coupled to the back of the mask body 11 and can fit closely to the user's face.

[0158] That is, the front portion of the face shield 14 can be in close contact with the back side of the rear body 13, and the back side of the face shield 14 can be in close contact with the user's face.

[0159] The face shield 14 may be formed in a water drop shape or a donut shape having a predetermined thickness and a hollow center. The face shield 14 may be formed with a storage space 144 formed by penetrating the center portion of the face shield 14 from the front to the back, and the user's nose or mouth is stored inside the storage space 144.

[0160] The face shield 14 may be formed in a shape in which the width in the left-right direction becomes narrower as it approaches the upper part from the lower part. In addition, the accommodating space 144 is formed in a shape in which the 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 accommodating space 144, and the nose of the user can be accommodated in the upper space of the accommodating 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.

[0161] The face shield 14 may be molded from a stretchable silicon or rubber material, and may form a breathing space inside the face shield 14 by fitting closely to the user's face.

[0162] In detail, the face shield 14 may include: a coupling portion 141 facing the back of the rear body 13; a close fitting portion 142 close fitting the user's face; and a connecting portion 143 connecting the coupling portion 141 and the close fitting portion 142, and having a predetermined width in the front-to-back direction. The coupling portion 141, the close fitting portion 142, and the connecting portion 143 may be formed as one body.

[0163] On the other hand, it can also be described that the face shield 14 includes: a front portion, which is in close contact with the back of the rear body 13; a back portion, which is in close contact with the user's face; and a side portion, which connects the front portion and the back portion and has a specified width in the front-to-back direction.

[0164] The coupling portion 141 may be formed to have a predetermined width and surround the front end edge of the face shield 14. The coupling portion 141 may be formed in a ring shape forming a closed loop.

[0165] The coupling portion 141 is provided with magnetic body mounting portions 1461 , 1462 , 1463 , and magnetic bodies 1451 , 1452 , 1453 that exert attractive force on the magnet mounted on the front surface of the rear body 13 are mounted on the magnetic body mounting portions 1461 , 1462 , 1463 .

[0166] The magnetic body mounting parts 1461, 1462, 1463 protrude forward from the coupling part 141, and the magnetic bodies 1451, 1452, 1453 can be inserted and mounted inside the magnetic body mounting part 146. The magnetic body mounting parts 1461, 1462, 1463 can be formed in plural.

[0167] In detail, the magnetic body mounting parts 1461, 1462, 1463 include: a first magnetic body mounting part 1461, which is arranged on the upper part of the connecting part 141; and a second magnetic body mounting part 1462 and a third magnetic body mounting part 1463, which are arranged on the lower part of the connecting part 141 and are separated from each other on both sides.

[0168] 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.

[0169] However, in this embodiment, the first magnetic body mounting portion 1461 can be arranged long in the horizontal direction, and the second magnetic body mounting portion 1462 and the third magnetic body mounting portion 1463 can be arranged 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, the first magnetic body mounting portion 1461 is used as a representative for description below.

[0170] The first magnetic body mounting portion 1461 may be disposed at the upper end center 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 lower end center of the coupling portion 141 on both sides.

[0171] In addition, the first magnetic body 1451 is installed on the inner side of the first magnetic body installation part 1461 , the second magnetic body 1452 is installed on the inner side of the second magnetic body installation part 1461 , and the third magnetic body 1453 is installed on the inner side of the third magnetic body installation part 1463 .

[0172] According to this structure, there are the following advantages: the face shield 14 can be easily fixed to the back side of the rear 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.

[0173] In particular, according to the present embodiment, since a magnetic body 1451 is present at the upper portion of the face shield 14 and two magnetic bodies 1452 and 1453 are present at the lower portion of the face shield 14, by first combining the magnetic body 1451 located at the upper portion of the face shield 14 with the first magnet mounting groove 1311, the remaining two magnetic bodies 1452 and 1453 can be guided to be naturally located in the second magnet mounting groove 1312 and the third magnet mounting groove 1313.

[0174] Therefore, there is no need to align the three magnetic bodies 1451, 1452, 1453 with the three magnet mounting grooves 1311, 1312, 1313 respectively, and incorrect combination is prevented, thereby having the advantage of making the installation of the face shield 14 easy and convenient.

[0175] In addition, there is an advantage that if the user pulls the face shield 14 with a force greater than the magnetic force while the three magnetic bodies 1451 , 1452 , and 1453 are attached due to magnetic force, the face shield 14 can be easily separated from the rear body 13 .

[0176] On the other hand, a separation protrusion 147 is formed on the face shield 14 . The separation protrusion 147 protrudes from the outer surface of the face shield 14 and keeps at least a part of the connection portion 143 separated from the filter cover 342 .

[0177] The separation protrusions 147 may be one or more protruding from the outer surface of the connection portion 143. The separation protrusions 147 may be formed to be protruding or have an arc. The separation protrusions 147 may be arranged in the area of ​​the filter cover 343.

[0178] In addition, the partition protrusion 147 may be formed long along the front-rear direction on the outer surface of the connection part 143. The length of the partition protrusion 147 may correspond to the width (front-rear direction) of the connection part 143 where the partition protrusion 147 is located.

[0179] The plurality of separation protrusions 147 may be formed in a spaced manner. The plurality of separation protrusions 147 may be formed on the left side and the right side of the connecting portion 143, respectively. The plurality of separation protrusions 147 may be arranged to be bilaterally symmetrical with respect to a vertical line passing through the center of the face shield 14.

[0180] In detail, the separating protrusion 147 may include: a first protrusion 1471 formed at a lower position of the left side of the connecting portion 143; a second protrusion 1472 formed at an upper side of the first protrusion 1471; and a third protrusion 1473 formed at an upper side of the second protrusion 1472.

[0181] The first to third protrusions 1471 to 1473 may be arranged to be spaced apart from each other in the up-down direction. The first to third protrusions 1471 to 1473 may be arranged to be parallel to each other.

[0182] In addition, the first to third protrusions 1471 to 1473 may be long extended along the front-rear direction on the side of the connection portion 143. At this time, the first to third protrusions 1471 to 1473 may be formed to have a length corresponding to the width (front-rear direction) of the connection portion 143.

[0183] like Fig.12 As shown, the connection portion 143 may be formed such that the width in the front-rear direction increases from the lower portion to the upper portion, whereby the third protrusion 1473 located at the upper portion of the connection portion 143 may be formed to be longer than the first protrusion 1471 located at the lower portion of the connection portion 143 .

[0184] In addition, the first protrusion 1471 to the third protrusion 1473 can be arranged in the area of ​​the filter cover 342. This is because when the user wears the mask device 10, it is prevented that a part of the face shield 14 covers the suction port, that is, the suction grille 343, as the face shield 14 is pressed.

[0185] That is, even if the face shield 14 is pressed by external force, the first to third protrusions 1471 to 1473 can keep the face shield 14 separated from the filter cover 342 .

[0186] 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 center 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.

[0187] The portion of the face shield 14 that is in close contact with the user's face may be formed with through holes 1481, 1482 for ventilation. A plurality of through holes 1481, 1482 may be formed along the periphery of the close contact portion 142. The through holes 1481, 1482 may have a circular or non-circular cross section.

[0188] When the user wears the mask device 10, the close fitting portion 142 of the face shield 14 is close to and fixed on the user's face. At this time, when the mask device 10 is worn for a long time, sweat or pollutants may accumulate on the user's face. Therefore, by forming a plurality of through holes 1481 and 1482 in the close fitting portion 142 of the face shield 14, ventilation can be provided to the user's face.

[0189] Next, the structure in which the face shield is combined with the rear body will be described in detail with reference to the accompanying drawings.

[0190] Fig.14 Yes Fig.13 The "A" portion is enlarged and shown in the figure, Fig.15 is a three-dimensional diagram of a magnetic body according to an embodiment of the present invention, Fig.16 is a side view of the magnetic body, Fig.17 It is a longitudinal cross-sectional view of a magnetic body mounting portion combined with the magnetic body.

[0191] Reference Figures 14 to 17 As mentioned above, the magnetic bodies 1451 to 1453 can be inserted into the respective magnetic body mounting parts 1461 to 1463 of the face shield 14 in a detachable manner.

[0192] The magnetic body mounting portions 1461 to 1463 and the magnetic bodies 1451 to 1453 have the same form or structure, and therefore, the first magnetic body mounting portion 1461 and the first magnetic body 1451 are described as representatives below.

[0193] The first magnetic body mounting part 1461 includes: a mounting part body 1461a, which protrudes forward from the outer surface of the coupling part 141; an insertion guide rib 1461b, which is arranged on the inner side of the mounting part body 1461a; and an insertion hole 1461c, which is formed between the mounting part body 1461a and the insertion guide rib 1461b.

[0194] The mounting portion body 1461a may protrude in a hollow shape at the upper center of the coupling portion 141. The mounting portion body 1461a may be formed into a shape that allows the first magnetic body 1451 to be inserted into the inside thereof. As an example, the mounting portion body 1461a may be in a quadrilateral shape, and may be in a shape with an opening on the front and back sides.

[0195] The insertion guide rib 1461b guides the insertion position of the first magnetic body 1451 and stably supports the first magnetic body 1451 without shaking. The first magnetic body 1451 whose insertion position is guided by the insertion guide rib 1461b can be inserted into the insertion hole 1461c.

[0196] In detail, the insertion guide rib 1461b is formed in a "U" shape and is arranged at the inner center of the mounting portion body 1461a. Thus, a first insertion hole 1461c is formed between the inner circumference of the mounting portion body 1461a and the left end of the insertion guide rib 1461b, and a second insertion hole 1461c is formed between the inner circumference of the mounting portion body 1461a and the right end of the insertion guide rib 1461b.

[0197] That is, a plurality of 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 hooks 1451d of the first magnetic body 1451 can be caught and fixed in the insertion holes 1461c.

[0198] On the other hand, the first magnetic body 1451 is formed of a magnetic material. As an example, it can be formed of iron or stainless steel. The first magnetic body 1451 can be formed in a "U" shape or a "匚" shape.

[0199] Specifically, the first magnetic body 1451 includes: a magnetic main body 1451a forming the main body; fixing hooks 1451d extending rearward from both ends of the magnetic main body 1451a and inserted into the plurality of insertion holes 1461c.

[0200] The magnetic main body 1451a can be formed in a quadrilateral plate shape. As an example, the magnetic main body 1451a can be formed as a quadrilateral plate having a thickness in the front-rear direction and a longer length in the left-right direction. At this time, the fixing hooks 1451d can be formed by extending rearward from the left and right end portions of the magnetic main body 1451a, respectively.

[0201] Specifically, the fixing hook 1451d includes: an extension portion 1451b extending rearward a predetermined length from the center of both end portions of the magnetic main body 1451a; and a hook portion 1451c formed in a hook shape at the end of the extension portion 1451b. The hook portion 1451c can be formed such that the radius in the up-down direction becomes larger at the end of the extension portion 1451b.

[0202] At this time, the height H3 of the hook portion 1451c in the up-down direction is smaller than the height H1 of the magnetic main body 1451a in the up-down direction and larger than the height H2 of the extension portion 1451b in the up-down direction.

[0203] In addition, the height H2 of the extension portion 1451b in the up-down direction is slightly smaller than the height H4 of the insertion slit 1461d formed in the mounting portion main body 1461a. Further, the height H3 of the hook portion 1451c in the up-down direction is larger than the height H4 of the insertion slit 1461d and smaller than the height H5 of the insertion hole 1461c of the mounting portion main body 1461a.

[0204] 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.

[0205] In this way, if Fig.17 As shown, the hook portion 1451c is prevented from being disengaged to the outside through the insertion slit 1461d when being accommodated in the insertion hole 1461c.

[0206] Fig.18 It is a transverse cross-sectional view showing a state in which the magnet mounting portion of the rear body and the magnetic body mounting portion of the face shield are coupled.

[0207] As mentioned 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.

[0208] The magnet mounting groove 1314 includes: a first magnet mounting groove 1311 formed on the front and back sides 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 sides of the lower magnet mounting portion 134 .

[0209] The three magnetic bodies 1451-1453 installed on the face shield 14 are respectively attached to the first magnet installation groove 1311 to the third magnet installation 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 body 13.

[0210] On the other hand, the upper magnet mounting portion 134 and the pair of magnet mounting portions 135 differ 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 is described below as a representative.

[0211] Reference Fig.18 The upper magnet mounting portion 134 includes a magnet mounting portion body 1341 , and the magnet mounting portion body 1341 forms a placement space 1343 for placing the magnet 25 .

[0212] The magnet installation body 1341 protrudes forward from the front side of the rear body 13 , and a portion of the front side is recessed backward to form the placement space 1343 .

[0213] In addition, a pair of first guide ribs 1342 may be formed on both sides of the front surface of the magnet mounting portion body 1341, and the pair of first guide ribs 1342 are used to hold both ends of the magnet 25 inserted into the placement space 1343. The pair of first guide ribs 1342 may protrude forward from a portion of the front surface of the magnet mounting portion body 1341 corresponding to the edge of the placement space 1343.

[0214] Through the structure of the pair of first guide ribs 1342 , the magnet 25 can be deeply inserted into the seating space 1343 and stably supported.

[0215] In addition, a pair of second guide ribs 1344 may be formed on both sides of the back side of the magnet mounting portion body 1341, and 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 backward from a portion of the back side of the magnet mounting portion body 1341 corresponding to the edge of the magnet mounting groove 1314.

[0216] Through 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 be stably supported.

[0217] 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 can be combined due to magnetic force.

[0218] Therefore, there is an advantage that the face shield 14 can be easily attached to and detached from the rear body 13 , and the face shield 14 can be prevented from being easily separated from the rear body 13 .

Claims

1. A mask device, wherein: include: The mask body includes a rear body and a front body connected to the front of the rear body, and is formed with an inlet and an outlet; A face shield is magnetically coupled to the back of the rear body so as to be in close contact with the user's face, and a breathing space is formed inside the face shield; as well as an air purification module, mounted on the rear body, for purifying the external air flowing into the suction port and supplying the air to the breathing space; The face shield comprises: The combining part, facing the back side of the rear main body, is provided with a magnetic body mounting part; A close fitting portion, which is close to the user's face; and A connecting portion, formed to connect the coupling portion and the close contact portion, having a predetermined width in the front-rear direction; The magnetic body mounting portion comprises: The mounting portion body protrudes forward from the outer surface of the coupling portion; Insertion guide ribs formed on the inner side of the mounting portion body; and The magnetic body is inserted into the inner side of the mounting portion body through an insertion hole formed between the mounting portion body and the insertion guide rib. The magnetic body comprises: A magnetic body covering the front side of the mounting portion body; and A pair of fixing hooks extend rearwards from two ends of the magnetic body and are inserted into the insertion holes.

2. The mask device according to claim 1, wherein: The mounting portion body is formed with an inner space with an opening on the front side for accommodating the magnetic body.

3. The mask device according to claim 2, wherein: The magnetic body is detachably coupled to the mounting portion body through the open front surface of the mounting portion body.

4. The mask device according to claim 1, wherein: The insertion guide rib is arranged at the inner center of the mounting portion body, and both ends thereof are bent rearward.

5. The mask device according to claim 4, wherein: Both ends of the magnetic body are inserted into a space between both ends of the insertion guide rib and the mounting portion body.

6. The mask device according to claim 1, wherein: The fixing hook comprises: an extension portion extending rearward from an end of the magnetic body; and The hook portion extends from the end of the extending portion in the up-down direction and has a hook shape.

7. The mask device according to claim 1, wherein: The fixing hook is inserted into the inner side of the mounting portion body in an interference fit manner.

8. The mask device according to claim 1, wherein: A magnet mounting portion is protruded on the front side of the rear body, and a magnet is mounted on the magnet mounting portion. A magnet mounting groove for attaching the magnetic body mounting portion is formed at a portion of the rear surface of the rear body corresponding to the front and rear surfaces of the magnet mounting portion.

9. The mask device according to claim 1, wherein: The magnetic body mounting portion comprises: A first magnetic body mounting portion is disposed at the center of the upper end of the front side of the coupling portion; and The second magnetic body mounting portion and the third magnetic body mounting portion are respectively arranged to be spaced apart on both sides with the center of the lower end of the front side of the coupling portion as a reference.

10. The mask device according to claim 9, wherein: The first magnetic body mounting portion is located at a portion of the face shield corresponding to the upper side of the air purification module. The second magnetic body mounting portion and the third magnetic body mounting portion are located at a portion of the face shield corresponding to a lower side of the air purification module.

11. The mask device according to claim 9, wherein: The first magnetic body mounting portion is located at a portion of the face shield corresponding to the upper side of the discharge port. The second magnetic body mounting portion and the third magnetic body mounting portion are located at a portion of the face shield corresponding to a lower side of the discharge port.

12. The mask device according to claim 1, wherein: The suction port is located outside the breathing space, The discharge port is located inside the breathing space.

13. The mask device according to claim 1, wherein: The air purification module comprises: a filter disposed in front of the suction port; and The filter cover is installed on the rear body and covers the filter.

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