Mask device

Abstract

A mask device includes a mask body including a front body and a rear body, a flow guide configured to a rear surface of a fan module to form a part of a discharge port communicating with a breathing space, and a filter case rotatably connected to the rear body to cover a filter. The flow guide includes a fixing plate covering the rear surface of the fan module, a duct flange bent and extended from one end of the fixing plate, an upper flange bent and extended from an upper end of the fixing plate and the duct flange, a lower flange bent and extended from a lower end of the fixing plate and the duct flange, and guide shoulders protruding in an arc shape formed at the upper flange and the lower flange. The filter case includes a pair of filter frames extending in parallel toward each other, a filter cover connected to a rear surface of the pair of filter frames, a hinge extended from an edge of each of the filter frames, a fastening hook extended from a side end portion opposite to a side end portion in which the hinge is formed to be engaged with the filter hook, and a guide groove formed at the filter frame to be engaged with the guide shoulder.

Description

TECHNICAL FIELD

[0001] The present application relates to a mask device. BACKGROUND

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

[0003] Recently, due to the rampant of a virus that is very strong in spreading and infectivity, it is being recommended that everyone wear a mask to go out for safety to minimize infection.

[0004] At present, various kinds and forms of masks are being introduced to the market, and in particular, many masks installed with a filter module are being sold to minimize harmful substances contained in air from directly flowing into the respiratory organs of a mask wearer as much as possible.

[0005] In addition, many masks installed with a fan are also being sold to make the flow of air through the mask smooth when a user inhales or exhales.

[0006] The existing mask disclosed in the published prior art European Patent No. EP 3398657 A (published on November 7, 2018) is provided with a filter so that harmful substances contained in external air are filtered and then flow into the respiratory organs of a user.

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

[0008] However, most of the masks introduced and disclosed in the market at present have a structure in which an air suction port is formed in the front surface of the mask, and an air discharge port is formed in the back surface of the mask, specifically, in the back surface of the mask corresponding to a position close to the mouth or nose of a user. Here, the front surface of the mask refers to a portion exposed to the outside, and the back surface of the mask refers to a portion in close contact with the face of a user.

[0009] In detail, the air suction port formed on the mask is usually formed in a position close to the center of the front surface or a position close to both side ends of the front surface, and in the above-mentioned prior art, the air suction port is formed in a position close to both side ends of the front surface of the mask.

[0010] In a structure in which the air suction port is formed on the front surface of the mask and the air discharge port is formed on the back surface of the mask as described above, the outside air flows into the inside of the mask and is discharged to the respiratory organs of the user through the air discharge port after passing through the fan and the filter, in the process of which there is a problem that the flow conversion of the air occurs excessively.

[0011] As the number of flow conversion of the inhaled air increases, the flow resistance increases, which results in an increase in the load of the fan. In addition, as the load of the fan increases, there is a problem that the power consumption of the battery that supplies power to the fan becomes large.

[0012] Furthermore, as the number of flow conversion of the inhaled air increases, there is a problem that the flow noise increases.

[0013] In addition, the user who wears the mask in which the air suction port is disposed on the front surface of the mask tends to place the mask in a state in which the air suction port faces upward or forward after removing the mask, and thus there is a disadvantage that the possibility that dust flows in through the air suction port is relatively high.

[0014] In addition, in the case in which the air suction port is disposed on the front surface of the mask, there can be an impression that the appearance is not aesthetically pleasing when worn.

[0015] In addition, when the user moves or runs in a state in which the mask device is worn, foreign substances or flies floating in front of the user can directly flow into the suction port, and thus there is a disadvantage that the lifespan of the filter is shortened and the replacement period of the filter is shortened.

[0016] In addition, in order to prevent the air suction port from being directly exposed to the outside, a suction port cover is further installed, and in this case, there can be a phenomenon that the suction port cover is separated from or damaged from the mask due to a force or impact acting from the outside.

[0017] In addition, in a structure in which the suction port is not formed in the mask body but is formed in other parts, for example, in the case of a separate air purification module that is separably or foldably coupled to the side surface of the mask body, there is a disadvantage that the flow resistance is significantly increased during the time in which the air inhaled into the air purification module reaches the discharge port formed in the center of the mask body. SUMMARY

[0018] The present application is proposed to improve the above-described disadvantages.

[0019] A mask device for achieving the object as described above according to an embodiment of the present application includes a mask body including a front body and a rear body combined at a back of the front body, a pair of accommodation portions protruding forward from the rear body; a face guard combined at a back of the rear body and closely adhered to a face of a user, a breathing space being formed at an inner side of the face guard; a fan module disposed at the accommodation portions; a flow guide disposed at a back of the fan module, forming a part of a discharge port in communication with the breathing space; a filter disposed at the flow guide; and a filter case rotatably coupled to the rear body, covering the filter, the flow guide including a fixing plate covering a back of the fan module; a duct flange bent and extended from one end of the fixing plate; an upper flange bent and extended from upper ends of the fixing plate and the duct flange; a lower flange bent and extended from lower ends of the fixing plate and the duct flange; and a rear flange formed at an end portion of the duct flange, forming a part of a back of the mask body, guide shoulders with arc-shaped protrusions being respectively formed at the upper flange and the lower flange, the filter case including a pair of filter frames extending in parallel with each other in a state of facing each other; a filter cover coupled to a back of the pair of filter frames; a hinge extended from an edge of each of the pair of filter frames; and a fastening hook extended from a side end portion of the filter case opposite to a side end portion in which the hinge is formed, being engaged with filter hooks formed at the pair of accommodation portions, guide grooves engaged with the guide shoulders being respectively formed at the pair of filter frames.

[0020] The pair of accommodation portions respectively include a fastening surface extending forward from a side end portion of the rear body, the filter hooks being protruded at a back of the fastening surface; a seating surface extending from an end portion of the fastening surface toward a center direction of the rear body, the filter being seated at a back of the seating surface; an air guide surface connecting an end portion of the seating surface and a front surface of the rear body; a top surface connecting upper ends of the fastening surface, the seating surface, and the air guide surface and the front surface of the rear body; and a bottom surface connecting lower ends of the fastening surface, the seating surface, and the air guide surface and the front surface of the rear body.

[0021] Hinge holes in a long hole form in which the hinge is inserted are respectively formed at the top surface and the bottom surface, the hinge holes extending from a front end portion of the top surface toward a rear end portion side and being inclined to extend in a direction in which the rear end portion is closer to the side end portion of the rear body.

[0022] An air passage is formed by the air guide surface and the duct flange, the upper flange includes a fixed upper flange bent and extended from the upper end of the fixed plate and a duct upper flange bent and extended from the upper end of the duct flange, the lower flange includes a fixed lower flange bent and extended from the lower end of the fixed plate and a duct lower flange bent and extended from the lower end of the duct flange, and the guide shoulder is formed in the fixed upper flange and the fixed lower flange, respectively.

[0023] The guide shoulder and the guide groove are formed closer to the hinge than the fastening hook.

[0024] The filter cover is formed with a suction port for sucking external air, and the suction port is a set of plural holes different in size from each other.

[0025] An air passage is formed by the air guide surface and the duct flange, the upper flange includes a fixed upper flange bent and extended from the upper end of the fixed plate and a duct upper flange bent and extended from the upper end of the duct flange, the lower flange includes a fixed lower flange bent and extended from the lower end of the fixed plate and a duct lower flange bent and extended from the lower end of the duct flange, and the guide shoulder is formed in the fixed upper flange and the fixed lower flange, respectively.

[0026] According to the mask device of the embodiment of the present application having the above-described structure, the following effects are obtained.

[0027] First, the suction port and the discharge port of the mask device are formed on the back surface of the mask body covering the face of the user, so that the flow resistance is remarkably reduced as compared with the case where the suction port of the mask device is formed on the front surface of the mask body or on a portion other than the mask body.

[0028] Second, in the state where the mask device is worn by the user, the suction port is not exposed to the outside, so that the mask device does not need to be equipped with an additional cover member for shielding the suction port. Further, since the additional cover member does not need to be installed on the front surface of the mask device, the phenomenon that the cover member is broken or separated by an external force does not occur.

[0029] Third, since the suction port is formed on the back surface of the mask body, the phenomenon that dust or other foreign matters flow into the inside of the mask device through the suction port is minimized when the mask device is removed with the front surface of the mask body facing the front or the upper side.

[0030] Fourth, since the suction port is formed on the back surface of the mask body, the front surface of the mask device is neatly treated, so that the additional effect that the purchasing desire of the purchaser is improved is also obtained.

[0031] Fifth, the phenomenon that the hook protruding from the end of the filter housing is broken by the force of the user's hand pressing when the hook is recombined after being separated from one end of the filter housing is prevented.

[0032] Sixth, by making the waterproof sleeve from the edge of the hanging hole constituting the hanging belt connection part to the front, and installing a sealing cap inside the waterproof sleeve, it has the advantage of being able to block the sweat or moisture flowing in through the hanging hole from flowing into the inside of the mask body.

[0033] Seventh, by installing a sealing cap at the end of the exhaust flow path guide, it has the effect of preventing moisture from penetrating through the gap generated between the exhaust flow path guide and the back of the front body.

[0034] Eighth, by forming a bending prevention wall on the indicator body constituting the indicator module, it has the effect of preventing the indicator body from bending due to the pressing force applied to the power button.

[0035] Ninth, by making the bending prevention protrusion protrude from the fixing plate of the flow guide, it has the effect of improving the noise caused by the interference of the fan blades and the fixing plate or the possibility of damage to the PCB of the fan module. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a front perspective view of a mask device according to an embodiment of the present invention.

[0037] Figure 2 is a rear perspective view of the mask device.

[0038] Figure 3 is an exploded perspective view of the mask device.

[0039] Figure 4 is a transverse sectional view of the mask device showing the air flow inside the mask device.

[0040] Figure 5 is a longitudinal sectional view of the mask device showing the air flow inside the mask device.

[0041] Figure 6 is a front perspective view of a rear body constituting a mask device according to an embodiment of the present invention.

[0042] Figure 7 is an enlarged sectional view showing the waterproof sleeve structure of the sealing cap of the mask device according to an embodiment of the present invention.

[0043] Figure 8 is a front perspective view of a sealing cap inserted into the front end of the flow path guide.

[0044] Figure 9 is a rear perspective view of the sealing cap.

[0045] Figure 10 is an exploded perspective view showing the combined relationship of the power module and the indicator module of the mask device according to an embodiment of the present invention.

[0046] Figure 11 is a front perspective view of an indicator body constituting an indicator module of an embodiment of the present application.

[0047] Figure 12 is a bottom view of the indicator body.

[0048] Figure 13 is a back perspective view of the indicator body.

[0049] Figure 14 is an enlarged perspective view of the back of the rear body showing a state in which a filter housing and a filter are excluded.

[0050] Figure 15 is an enlarged perspective view of the back of the rear body showing a state in which a flow guide is excluded.

[0051] Figure 16 is a front perspective view of a flow guide.

[0052] Figure 17 is a cutaway perspective view of a filter housing of an embodiment of the present application.

[0053] Figures 18 to 22 is a sectional view sequentially showing a closing process of the filter housing of an embodiment of the present application.

[0054] Figure 23 is a cutaway perspective view of a filter housing of another embodiment of the present application.

[0055] Figures 24 to 28 is a sectional view sequentially showing a closing process of the filter housing of another embodiment of the present application. DETAILED DESCRIPTION

[0056] Hereinafter, a mask device of an embodiment of the present application will be explained in detail with reference to the accompanying drawings.

[0057] Figure 1 is a front perspective view of a mask device of an embodiment of the present application, Figure 2 is a back perspective view of the mask device, Figure 3 is an exploded perspective view of the mask device, Figure 4 is a transverse sectional view of the mask device showing air flow inside the mask device, Figure 5 is a longitudinal sectional view of the mask device showing air flow inside the mask device.

[0058] Referring to Figures 1 to 5 , a mask device 10 of an embodiment of the present application includes a mask body 11, a faceguard 14 coupled to a back of the mask body 11 in a manner of being able to be fixed or separated, and an air purification module 30 installed inside the mask body 11.

[0059] In detail, the mask body 11 includes a front body 12 constituting a front surface shape and a rear body 13 coupled to a rear surface of the front body 12, constituting a rear surface shape. A front surface of the front body 12 forms a front surface of the mask device 10, and a rear surface of the rear body 13 faces a user's (or wearer's) face.

[0060] In addition, the face guard 14 is coupled to a rear surface of the rear body 13 and closely contacts the user's face, and can be formed of a silicon or rubber material having elasticity. A breathing space is formed in an inner side of the face guard 14, and if the user wears the mask device 10, the user's nose and mouth are accommodated in the breathing space. Thus, external air purified in a process through the air purification module 30 is guided to the breathing space and inhaled by the user, and air generated when the user exhales is also discharged to the breathing space.

[0061] A prescribed space is formed between the front body 12 and the rear body 13, as shown in Figure 4 and Figure 5 Various electrical components are installed in a front surface of the rear body 13, as shown in

[0062] In addition, the air purification module 30 includes a fan module 31 placed in an accommodation portion 133 (refer to Figure 6 ) formed in the rear body 13, and a filter 33 placed behind the fan module 31. The fan module 31 includes a centrifugal fan sucking air in an axial direction and discharging the air in a radial direction.

[0063] The air purification module 30 further includes a filter housing 34 placed behind the filter 33, and a suction port 343 for sucking external air is formed in the filter housing 34. The filter housing 34 can be coupled to the rear body 13 in a rotatable manner, and as shown in the drawing, the suction port 343 can be a set of a plurality of holes having different diameters from each other.

[0064] In addition, a discharge port 101 is formed at a position spaced apart from the center of the rear body 13 in a direction from the suction port 343. By the operation of the fan module 31, external air sucked through the suction port or suction grill 343 passes through the filter 33 and the fan module 31 in sequence, and is then discharged to the breathing space through the discharge port 101.

[0065] The suction port, i.e., the suction grill 343, is disposed on the outside of the protective mask 14, and the discharge port 101 is disposed on the inside of the protective mask 14. That is, the suction grill 343 is located on the outside of the breathing space, and the discharge port 101 is located on the inside of the breathing space, so that the inhaled external air and the air exhaled by the user do not mix with each other.

[0066] On the other hand, the air purification module 30 further includes a flow guide 32 disposed at the rear of the fan module 31.

[0067] 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.

[0068] In detail, the main control module 15 is a module for controlling the operation of the fan module 31, the speaker module 19, a pressure sensor (not shown), a microphone (not shown), etc. The main control module 15 can be disposed on the upper portion of the front center of the rear body 13.

[0069] The power module 16 is a control module for supplying power to the electrical components mounted to the mask device 10. The power module 16 can be disposed on the right lower end of the front of the rear body 13.

[0070] A terminal connection portion and an LED module, etc. can be mounted to the power module 16, a terminal of a cable for power supply and data transmission is inserted into the terminal connection portion, and the LED module is used to notify the operation state of the mask device 10. In addition, light emitted from the LED module can be diffused and guided to the outside of the mask device 10 through the indicator module 18.

[0071] The wireless communication module 17 can be any one of various forms of short-range wireless communication modules including Bluetooth. The wireless communication module 17 can be disposed on the left lower end of the front of the rear body 13. The wireless communication module 17 can be mounted horizontally as an example on the front of the rear body 13 in a direction crossing the rear body 13. The wireless communication module 17 can be mounted in a horizontal state on the front of the rear body 13 by means of a pair of substrate insertion ribs 1315 protruding from the front of the rear body 13. Both side end portions of the wireless communication module 17 are supported by the pair of substrate insertion ribs 1315.

[0072] The speaker module 19 can be disposed on the left lower end of the front of the rear body 13 corresponding to the lower side of the wireless communication module 17.

[0073] The battery 20 can be disposed at the center of the front surface of the rear body 13, and the exhaust valve 21 can be disposed to shield an exhaust port formed at the lower side of the center of the front surface of the rear body 13. That is, the exhaust valve 21 can open the exhaust port when the user exhales, and can shield the exhaust port when the user inhales. The exhaust valve 21 can be provided in the form of a flap that can be bent and flattened.

[0074] Here, it is noted that the front surface, the back surface, the left side, and the right side of the mask body 11 are defined based on the state in which the user wears the mask device 10.

[0075] On the other hand, as shown in Figure 4 and Figure 5 If the user presses the power button to operate the fan module 31, external air flows into the inside of the mask device 10 through the intake port 343 formed at the left and right sides of the back surface of the mask device 10.

[0076] The external air flowing in through the intake port 343 is purified while passing through the filter 33. In addition, the air passing through the filter 33 is sucked in along the axial direction of the fan module 31, and then is discharged in the radial direction.

[0077] In addition, the air discharged in the radial direction of the fan module 31 is guided to the discharge port 101 through an air passage 102 formed by the side surface of the flow guide 32 and the air guide surface 1334 (see Figure 6 ) of the accommodation portion 133. In addition, the air is supplied to the breathing space defined inside the face guard 14 through the discharge port 101.

[0078] On the other hand, when the user exhales, air discharged through the mouth and nose of the user is accumulated in the breathing space. In addition, the air accumulated in the breathing space is lowered and discharged to the outside through the front surface exhaust port 1361 and the bottom surface exhaust port 1362. Here, under the action of the pressure of the air generated when the user exhales, the exhaust valve 20 is bent in the forward direction, so that the front surface exhaust port 1361 is opened. In addition, when the user inhales, the pressure inside the breathing space is lower than the atmospheric pressure, so that the exhaust valve 20 returns to the original position and shields the front surface exhaust port 1361.

[0079] Hanging strap connection portions 137 are formed at the left and right end portions of the rear body 13, respectively. In detail, the hanging strap connection portions 137 are portions for connecting the end portions of a hanging strap or a band that is hung on the ears of the user or around the back of the head of the user. The hanging strap connection portions 137 can be formed at the upper and lower portions of the left end of the rear body 13 and the upper and lower portions of the right end, respectively.

[0080] The two end portions of either one of the pair of ear bands can be connected to the ear band connection portions 137 provided at the upper and lower ends of the left side, respectively, and the two end portions of the other one can be connected to the ear band connection portions 137 provided at the upper and lower ends of the right side, respectively. In this way, the pair of ear bands can be hung on the two sides of the user's head, respectively.

[0081] As another method, the two end portions of either one of the pair of ear bands can be connected to the ear band connection portions 137 provided at the upper ends of the left and right sides, respectively, and the two end portions of the other one can be connected to the ear band connection portions 137 provided at the lower ends of the left and right sides, respectively. In this way, the pair of ear bands can be wrapped around the back of the user's head.

[0082] Each of the four ear band connection portions 137 includes an ear band groove 1373 recessed from the front surface of the rear body 13 and extending in the lateral direction (the width direction of the rear body), an ear band hole 1374 formed at any position of the ear band groove 1373, an ear band rod 1372 connecting the top and bottom surfaces of the ear band groove 1373, and a waterproof sleeve 1371 (see FIG. 6) of a cylindrical shape extending from the rear surface of the rear body 13 at a position corresponding to the edge of the ear band hole 1374. In addition, the hook of the ear band is rotatably hung on the ear band rod 1372. Figure 6

[0083] Figure 6 is a front surface perspective view of a rear body constituting a mask device according to an embodiment of the present disclosure.

[0084] Referring to Figure 6 , the rear body 13 of the mask device 10 according to an embodiment of the present disclosure includes a face cover portion 131 covering the face of a user, a fusion portion 132 bent forward from the edge of the face cover portion 131, and a pair of accommodation portions 133 protruding forward from the front surface of the face cover portion 131 and accommodating the air purification module 30.

[0085] In detail, the fusion portion 132 is continuously formed along the top edge, the side edges, and the bottom edge of the face cover portion 131. In addition, the fusion portion 132 bent along the bottom edge of the face cover portion 131 and extending forward has the greatest width in the front-rear direction.

[0086] The portion of the fusion portion 132 formed at the bottom edge of the face cover portion 131 can be particularly defined as an extension stage 1320. The extension stage 1320 has a convex circular shape, and the width of the extension stage 1320 in the front-rear direction increases as it is closer to the center from the both side ends of the rear body 13.

[0087] ​A bottom surface exhaust port 1362 can be formed in the center of the welding portion 132 defined as an extension table, and a button hole 1321 can be formed at a position spaced apart from the bottom surface exhaust port 1362 toward the side end portion side of the rear body 13. A power button is inserted into the button hole 1321. A pair of indicator holes 1322 of a small diameter are respectively formed at the left and right edges of the button hole 1321.

[0088] Light emitted from a light emitting unit mounted to the power module 16 is emitted to the outside through the pair of indicator holes 1322. The light emitting unit includes an LED module.

[0089] If light is emitted to the outside through either of the pair of indicator holes 1322, it can be indicated that the power of the mask device 10 is in an on state. In addition, the remaining capacity of the battery 20 can be predicted according to the color of light emitted through the other of the pair of indicator holes 1322.

[0090] A terminal insertion port 1323 is formed at a position further spaced apart from the button hole 1321 toward the side end portion side of the rear body 13. A USB (Universal Serial Bus) cable can be inserted through the terminal insertion port 1323 and into a terminal connector 162 (see FIG. 6) formed on the power module 16. Figure 10 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 data transmitted through the USB cable.

[0091] A pair of the accommodation portions 133 are respectively formed at the left and right sides of the center of the rear body 13 and are symmetrical with respect to a vertical line passing through the center of the rear body 13.

[0092] The accommodation portions 133 respectively protrude forward from the front surface of the face cover portion 131, thereby forming spaces in which the air purification module 30 is accommodated. The accommodation portions 133 include a seating surface 1331 on which the air purification module 30, specifically the fan module 31, is seated, a fastening surface 1335 connecting the outer side edges of the seating surface 1331 at the side end portions of the face cover portion 131, and an air guide surface 1334 connecting the front surface of the face cover portion 131 at the inner side edges of the seating surface 1331. The air guide surface 1334 forms the front surface of the air passage 101.

[0093] In addition, the accommodation portions 133 further include a top surface 1332 connecting the upper ends of the seating surface 1331, the air guide surface 1334, and the fastening surface 1335 to the front surface of the face cover portion 131.

[0094] Further, the accommodation portion 133 further includes a bottom surface 1333 connecting the lower ends of the seating surface 1331, the air guide surface 1334, and the fastening surface 1335 to the front surface of the surface cover portion 131.

[0095] One or more fastening units are formed in the fastening surface 1335, and, as an example, fastening hooks 1338, 1339 (see FIG. 6) are formed. Figure 14 18 ).

[0096] A fan mounting hole 1336 is formed in the seating surface 1331, the top surface 1332 and the bottom surface 1334 can extend horizontally, and can extend parallel to each other.

[0097] The fastening surface 1335 can be convexly curved toward the outside of the rear body 13, and can be formed to be inclined more as it approaches the seating surface 1331 from the surface cover portion 131.

[0098] The air guide surface 1334 can be designed to extend convexly curved from the seating surface 1331 toward the surface cover portion 131, so that air sucked by the fan module 31 is gently guided along the air guide surface 1334 to the discharge port 101 side.

[0099] The accommodation portion 133 includes a left side accommodation portion formed on the left side of the center of the rear body 13, and a right side accommodation portion formed on the right side of the center of the rear body 13. The left and right side accommodation portions are spaced apart from the center of the rear body 13 by a predetermined interval, and the battery 20 is installed in the space between the left and right side accommodation portions.

[0100] A battery mounting portion 138 can be formed in the front surface of the rear body 13. One end of the battery mounting portion 138 extends from either the left or right air guide surface 1334, and the other end is connected to the other of the left and right air guide surfaces 1334.

[0101] The battery mounting portion 138 is formed in the shape of an n, and supports the front and side surfaces of the battery 20. Accordingly, the battery mounting portion 138 can prevent the battery 20 from being separated from the rear body 13.

[0102] In addition, the center portion of the battery mounting portion 138 is further convex toward the front, so that batteries of different sizes can be selectively installed.

[0103] ​On the other hand, if the user sweats in a state of wearing the mask device 10, sweat can flow into the belt hole 1374 along the belt. Not only that, even in a state of not wearing the mask device 10, dust or other foreign matter can enter the belt hole 1374.

[0104] Furthermore, the moisture flowing in through the belt hole 1374 can corrode the electrical components installed on the front surface of the rear body 13, and there is a risk that sparks can be generated around the electrical components due to the entry of dust.

[0105] To improve such a problem, a waterproof sleeve 1371 is formed on the front surface of the rear body 13. The waterproof sleeve 1371 extends a prescribed length from the front surface of the rear body 13 along the edge of the belt hole 1374.

[0106] Furthermore, a sealing cap 100 is inserted into the inside of the waterproof sleeve 1371, so that the moisture and foreign matter flowing in through the belt hole 1374 can be blocked from entering the space between the front body 12 and the rear body 13. The structure of the waterproof sleeve 1371 and the sealing cap 100 will be described later in detail with reference to the drawings.

[0107] On the other hand, an exhaust flow guide 136 is protruded from a portion of the front surface of the face cover portion 131 corresponding to the lower side of the battery mounting portion 138 toward the front. Furthermore, a sealing cover 60 is installed at the front end portion of the exhaust flow guide 136, which will be described later in detail with reference to the drawings.

[0108] In detail, the exhaust flow guide 136 is formed at the lower side of the battery mounting portion 138 so that the lower end portion of the battery 20 installed in the battery mounting portion 138 is supported by the top surface of the exhaust flow guide 136. As a result, it is possible to prevent the battery 20 from falling down to the lower side by gravity in a state of being inserted into the battery mounting portion 138.

[0109] The exhaust flow guide 136 can have a longitudinal cross section in a substantially tunnel shape, and a front exhaust port 1361 can be formed at a portion of the face cover portion 131 corresponding to the inside of the exhaust flow guide 136.

[0110] At least one of the front exhaust port 1361 and the bottom exhaust port 1362 can be configured in an exhaust grate shape in which a plurality of small exhaust ports are divided by a plurality of grates or partition ribs. Furthermore, the front exhaust port 1361 is selectively opened and closed by the exhaust valve 21.

[0111] Figure 7 is an enlarged sectional view showing the structure of the waterproof sleeve of the sealing cap of the mask device to which the embodiment of the present application is installed.

[0112] Referring to Figure 7 , the waterproof sleeve 1371 extends with a length spaced apart from the rear surface of the front body 12.

[0113] In detail, the waterproof sleeve 1371 can also extend with a length in contact with the rear surface of the front body 12 to prevent moisture and foreign substances from entering between the front body 12 and the rear body 13. However, in the state where the rear body 13 and the front body 12 are combined, there is a high possibility that the end of the waterproof sleeve 1371 does not completely adhere to the rear surface of the front body 12 due to assembly tolerance.

[0114] Alternatively, the end of the waterproof sleeve 1371 can be heat-welded to the rear surface of the front body 12, but in the heat-welding process, there is a risk that the waterproof sleeve 1371 is melted or the shape of the front body 12 is deformed. Also, there can be a problem that the portion of the end of the waterproof sleeve 1371 heat-welded is exposed to the front surface of the mask device 10, thereby causing poor aesthetic appearance.

[0115] To solve such a problem, the sealing cap 100 having the same cross-sectional structure as the cross-sectional shape of the waterproof sleeve 1371 and having a shorter length than the waterproof sleeve 1371 can be inserted into the inside of the waterproof sleeve 1371.

[0116] The sealing cap 100 can be composed of a material capable of elastic deformation, for example, a silicon material or a rubber material. The sealing cap 100 includes a cap body 1001 inserted into the inside of the waterproof sleeve 1371, and a cap cover 1002 formed at the upper end of the cap body 1001. The width of the cap cover 1002 is greater than the width of the cap body 1001, so that the cap cover 1002 is engaged at the end of the waterproof sleeve 1371, thereby being able to determine the insertion limit of the sealing cap 100.

[0117] As another method, the sealing cap 100 can be configured in the same shape as the inside shape of the waterproof sleeve 1371, and a stopper protrusion 1375 can be protruded on the inner circumferential surface of the waterproof sleeve 1371. The insertion limit of the sealing cap 100 can be determined by the stopper protrusion 1375.

[0118] In addition, the cross-sectional size of the sealing cap 100 can be manufactured to be slightly greater than the cross-sectional size of the waterproof sleeve 1371, so that in the case of being pushed into the waterproof sleeve 1371, the surface of the sealing cap 100 is strongly adhered to the inner circumferential surface of the waterproof sleeve 1371, thereby being able to maximize the sealing effect.

[0119] As another method, the waterproof sleeve 1371 can extend forward from the edge of the strap hole 1374 and extend obliquely in a manner with an increasing cross-sectional area. Thus, when the sealing cap 100 is inserted into the waterproof sleeve 1372, the deeper the insertion depth of the sealing cap 100, the greater the compression of the sealing cap 100, thereby determining the insertion limit of the sealing cap 100.

[0120] Figure 8 This is a front perspective view of the sealing cap inserted into the front end of the flow path guide. Figure 9 This is a perspective view of the back of the sealing cap.

[0121] Reference Figure 8 and Figure 9 It is designed such that, if the front body 12 is combined with the rear body 13, the front end of the exhaust flow path guide 136 is in close contact with the back of the front body 12.

[0122] However, due to assembly tolerances or tolerances caused by shrinkage after injection molding, the front end of the exhaust flow guide 136 may separate from the back of the front body 12, forming a gap. Furthermore, during movement while wearing the mask device 10 in the rain or during strenuous exercise, moisture or saliva may flow through the gap between the front body 12 and the rear body 13.

[0123] To prevent this, the front end of the exhaust flow guide 136 can be heat-fused to the back of the front body 12, similar to the waterproof sleeve 1371. However, this may cause the same problem that occurs when the waterproof sleeve 1371 is heat-fused.

[0124] To address this issue, a sealing cap 60 may be installed at the front end of the exhaust flow path guide 136.

[0125] In detail, the sealing cap 60 may be made of an elastic material such as silicone or rubber, just like the sealing cap 100.

[0126] The sealing cap 60 includes: a generally n-shaped cap frame 601 extending along the front end of the exhaust flow guide 136; an inner rib 604 extending rearward from the inner edge of the cap frame 601; an outer rib 603 extending rearward from the outer edge of the cap frame 601; and a connecting rib 602 connecting the left and right portions of the cap frame 601.

[0127] An insertion groove 605 having a width corresponding to the thickness of the exhaust flow path guide 136 is formed between the inner rib 604 and the outer rib 603, and the front end of the exhaust flow path guide 136 is inserted into the insertion groove 605.

[0128] In addition, by forming the connection rib 602, it is possible to prevent the phenomenon of the both end portions of the cover frame 601 from being spread apart.

[0129] Further, the both lower end portions of the sealing cover 60 are formed in a length to contact the extension stage 1320 formed at the edge of the bottom surface of the face cover portion 131. Thus, when the front main body 12 and the rear main body 13 are combined, a gap will not be generated between the lower end portions of the sealing cover 60 and the extension stage 1320.

[0130] Figure 10 FIG. 6 is an exploded perspective view illustrating a combined relationship of a power module and an indicator module of a mask device according to an embodiment of the present disclosure.

[0131] Referring to Figure 10 The power module 16 mounted to the mask device 10 is disposed at the front right lower end of the rear main body 13, and the indicator module 18 is assembled and combined on the substrate of the power module 16.

[0132] In detail, the power module 16 includes a power substrate 161 and a plurality of electrical components mounted to the front of the power substrate 161. The plurality of electrical components include at least one of a terminal connection portion 162, a connector 163, a power switch 164, and LEDs 165 and 166.

[0133] The terminal connection portion 162 functions as an interface, and a USB cable is inserted from the outside to the terminal connection portion 162 and charges the battery 200, or updates or upgrades the version or function of the mask device 10 using data transmitted through the USB cable.

[0134] The connector 163 functions to connect with the PCB of the main control module 15 and supply power to the main control module 15.

[0135] The power switch 164 is turned on or off by the power button 183 mounted to the button hole 1321. The power switch 164 can be mounted at the left lower end of the power substrate 161.

[0136] If the power switch 164 is turned on by the operation of the power button 183, power is supplied to the electrical components mounted to the mask device 10, and if turned off by the operation of the power button 183, power supply to the electrical components mounted to the mask device 10 is turned off.

[0137] The LEDs 165, 166 emit light to the outside to indicate the operation state of the mask device 10. The light emitted from the LEDs 165, 166 can be diffused and guided to the outside of the mask device 10 by the indicator module 18. If the indicator module 18 is combined with the power supply substrate 161, the LEDs 165, 166 are shielded by the indicator module 18 or are accommodated inside the indicator module 18.

[0138] The LEDs 165, 166 are respectively spaced apart to the left and right sides with the power switch 164 as a reference. The LEDs 165, 166 include a first LED 165 spaced apart to the right of the power switch 164 and a second LED 166 spaced apart to the left.

[0139] In addition, the power supply substrate 161 is formed with mounting holes 167, 168 for mounting the indicator module 18. The mounting holes 167, 168 are portions in which a portion of the indicator module 18 is engaged in a hooking manner.

[0140] The mounting holes 167, 168 are respectively spaced apart to the left and right sides with the power switch 164 as a reference. The mounting holes 167, 168 include a first mounting hole 167 spaced apart to the right of the power switch 164 and a second mounting hole 168 spaced apart to the left of the power switch 164. The first mounting hole 167 is spaced apart to the upper side of the first LED 165, and the second mounting hole 168 is spaced apart to the upper side of the second LED 166.

[0141] The indicator module 18 is mounted to the power supply substrate 161 to function to concentrate the light of the LEDs 165, 166 and diffuse and guide the light to the outside of the mask device 10.

[0142] The indicator module 18 includes an indicator body 181, a button sealing portion 182 inserted into the inside of the bottom surface of the indicator body 181, a power button 183 inserted into the inside of the button sealing portion 182, and a light guide portion 184 inserted into the inside of the indicator body 18.

[0143] The button sealing portion 182 includes a sealing portion body 1821 in which an insertion space in which the power button 183 is inserted is formed in the inside. The sealing portion body 1821 is mounted to the button mounting groove 1813 (see FIG. 19) formed in the bottom surface of the button mounting portion 1812 in a state in which the power button 183 is inserted into the inside of the sealing portion body 1821. Figure 11). The sealing portion body 1821 can be configured to surround the inside of the button mounting groove 1813. The sealing portion body 1821 can be formed of rubber or silicon material.

[0144] The insertion space of the sealing portion body 1821 can be recessed upward from the bottom surface of the sealing portion body 1821. In the case where the button sealing portion 182 is inserted into the button mounting groove 1813, the bottom surface of the sealing portion body 1821 can form a smooth single surface with the bottom surface of the button mounting portion 1812 without forming a step.

[0145] The sealing portion body 1821 functions to prevent moisture or foreign substances flowing into the space between the power button 183 and the button hole 1321 of the rear body 13 from flowing to the power substrate 161 side. To this end, the sealing portion body 1821 can be disposed opposite the button hole 1321, and the cross-sectional area thereof can be greater than that of the button hole 1321. Thus, a plurality of electrical components mounted to the power substrate 161 are waterproofed and thus protected from external influences.

[0146] In addition, a through protrusion 1822 through which a portion of the power button 183 passes is formed on the top surface of the sealing portion body 1821. An opening through which the power button 183 passes is formed in the inside of the through protrusion 1822, and the through protrusion 1822 can protrude upward from the center of the top surface of the sealing portion body 1821.

[0147] The through protrusion 1822 is disposed opposite the power switch 164. Thus, if the power button 183 is pressed, a portion of the power button 183 can pass through the through protrusion 1822 and come into contact with the power switch 164. The power switch 164 includes a tactile switch.

[0148] The power button 183 can be understood as a configuration that is pressed by a user to operate the power switch 164. The power button 183 can pass through the button hole 1321 and be exposed to the outside of the mask device 10 in a state of being inserted into the inside of the button sealing portion 182.

[0149] According to an embodiment, the power button 183 can be elastically configured to be movable by a predetermined distance in the up-and-down direction between the button sealing portion 182 and the rear body 13. To this end, an elastic member can be provided between the power button 183 and the button sealing portion 182. The elastic member can include a spring.

[0150] The power button 183 can include a button body 1831 installed in the button sealing part 182 and pressed by a user, and a button protrusion 1832 protruding from a top surface of the button body 1831 and contacting the power switch 164.

[0151] The button protrusion 1832 can protrude upward from a center of the top surface of the button body 1831. The button protrusion 1832 can be disposed in a direction facing the through protrusion 1822. Accordingly, if the button body 1831 is pressed by an external force, the button protrusion 1832 will pass through the through protrusion 1822 and press the power switch 164.

[0152] The light guide part 184 is accommodated inside the indicator body 181 and functions to guide light emitted from the LEDs 165, 166 toward the indicator hole 1322 and prevent the light from being diffused. The light guide part 184 is formed in a pair and is accommodated inside the pair of reflectors 1815, respectively. The light guide part 184 is installed on a top surface of the base 1811, and a portion thereof can be inserted into the light guide part hole 1814.

[0153] In detail, the light guide part 184 can include a tube part 1841 formed in a tube shape and inserted into the indicator hole 1322, an extension tube 1842 extending from an upper end of the tube part 1841 in a flared tube manner, and a fixing part 1843 formed at an upper end of the extension tube 1842 and fixed to the top surface of the base 1811.

[0154] A center of the tube part 1841 can coincide with a center of the indicator hole 1322. The extension tube 1842 can have an outer diameter corresponding to an area of an inner diameter of the light guide part hole 1814 and can be inserted into an upper end of the light guide part hole 1814. In a state of being fixed to the top surface of the base 1811, the fixing part 1843 can be disposed in a direction facing the LEDs 165, 166. At this time, an opening communicating with the extension tube 1842 is formed in the fixing part 1843.

[0155] Accordingly, light emitted from the LEDs 165, 166 is condensed by the reflectors 1815 and guided into the inside of the light guide part 184. In addition, the light passing through the light guide part 184 is diffused toward the outside of the mask device 10 through the indicator hole 1322.

[0156] Figure 11 is a front perspective view of an indicator body constituting an indicator module of an embodiment of the present application, Figure 12 is a bottom view of the indicator body, Figure 13 is a back perspective view of the indicator body.

[0157] Referring to Figures 11 to 13 The indicator body 181 of the indicator module 18 constituting an embodiment of the present application can include a base 1811, a button mounting portion 1812 extending downward from a bottom surface of the base 1811, a pair of reflectors 1815 extending upward from both sides of a top surface of the base 1811, and a bend prevention wall 1819 connecting the pair of reflectors 1815. In addition, the indicator body 181 can further include engaging portions 1816, 1817 formed in the top surfaces of the pair of reflectors 1815, respectively.

[0158] The base 1811 is formed in a shape extending longer in the left-right direction. The center of the base 1811 can be aligned with the center of the power switch 164. A button through-hole 1818 through which the power button 183 passes is formed in the center of the top surface of the base 1811. If the power button 183 is pressed, the power button 183 will pass through the button through-hole 1818 and press the power switch 164.

[0159] The button mounting portion 1812 is formed longer in the left-right direction on the bottom surface of the base 1811. At this time, the center of the button mounting portion 1812 can be aligned with the center of the base 1811. A button mounting groove 1813 into which the power button 183 is inserted is formed in the center of the button mounting portion 1812. The button mounting groove 1813 can be formed recessed upward from the bottom surface of the button mounting portion 1812. The button mounting groove 1813 is connected with the button through-hole 1818.

[0160] In addition, a light guide portion hole 1814 for inserting the light guide portion 184 is formed in the bottom surface of the button mounting portion 1812. The light guide portion hole 1814 can be formed penetrating upward from the bottom surface of the button mounting portion 1812. At this time, the light guide portion hole 1814 can penetrate from the bottom surface of the button mounting portion 1812 to the top surface of the base 1811.

[0161] The light guide portion hole 1814 is formed separately apart to both sides of the button mounting groove 1813. The pair of light guide portion holes 1814 can face and be connected with the pair of indicator holes 1322, respectively.

[0162] The reflector 1815 forms an accommodation space that accommodates the LEDs 165, 166, and functions to concentrate light emitted from the LEDs 165, 166. The reflector 1815 is formed separately apart to both sides of the button through-hole 1818 from the top surface of the base 1811, respectively.

[0163] The reflectors 1815 extend upward from both sides of the top surface of the base 1811, respectively, and can have a shape in which the front surface, both side surfaces, and top surface are closed and the back surface is open. Also, in the case where the indicator module 18 is combined with the power supply substrate 161, the LEDs 165, 166 mounted to the power supply substrate 161 are accommodated in the internal space of the reflectors 1815. The accommodation space of the reflectors 1815 is connected to the light guide portion holes 1814.

[0164] The engaging portions 1816, 1817 are portions formed in the reflectors 1815 and combined with the mounting holes 167, 168. The engaging portions 1816, 1817 include an extension portion 1816 extending from the top surface of the reflector 1815, and a hook portion 1817 formed at the end of the extension portion 1816.

[0165] The extension portion 1816 extends rearward from the top surface of the reflector 1815, and the hook portion 1817 can be provided at the end thereof. The pair of hook portions 1817 are fastened to the pair of mounting holes 167, 168 in a hooking manner, respectively, so that the indicator module 18 can be stably fixed to the power supply substrate 161 without shaking.

[0166] In the state where the indicator module 18 is assembled to the mask device, if the user presses the power button 183 toward the power switch 164, the center of the base 1811 is curved convexly upward with the force of pressing the power button 183. Also, as the base 1811 is curved, the pair of reflectors 1815 are spread or curved in a direction away from each other. The problem that excessive force due to such a phenomenon is transmitted to the power switch 164 to cause damage thereof occurs.

[0167] To solve such a problem, the pair of reflectors 1815 are connected by the bending prevention wall 1819. The bending prevention wall 1819 connects the inner side edges of the front surfaces of the pair of reflectors 1815. Also, a stepped portion 1819a can be formed at the position where the lower end of the bending prevention wall 1819 meets the top surface of the base 1811.

[0168] Due to the bending prevention wall 1819 and the stepped portion 1819a, even if excessive force is applied to the power button 183, the phenomenon that the base 1811 is curved does not occur, and thus, it is possible to prevent damage to the components mounted on the power supply substrate 161, or the phenomenon that the alignment state of the light guide portion 18 and the indicator hole is disturbed.

[0169] Figure 14 is an enlarged perspective view illustrating the back surface of the rear body in a state where the filter housing and the filter are removed,Figure 15 is an enlarged perspective view of the back surface of the rear body showing a state where the flow guide is removed, Figure 16 is a front perspective view of the flow guide.

[0170] Referring to Figures 14 to 16 As described above, the housing portion 133 that houses the air purification module 30 includes a seating surface 1331 on which the air purification module 30, specifically the fan module 31, is seated, a fastening surface 1335 that connects an outer side edge of the seating surface 1331 at a side end portion of the face cover portion 131, and an air guide surface 1334 that connects a front surface of the face cover portion 131 at an inner side edge of the seating surface 1331. The air guide surface 1334 forms a front surface of the air passage 101.

[0171] A flow guide hook 1339 (see Figure 18 ) and a filter hook 1338 are respectively formed at the fastening surface 1335 in a front-rear direction. The flow guide hook 1339 is located closer to the seating surface 1331 than the filter hook 1338.

[0172] Further, a hook groove 1337 is formed at a back surface side end of the rear body 13 corresponding to the rear of the filter hook 1338.

[0173] In addition, the housing portion 133 further includes a top surface 1332 that connects upper ends of the seating surface 1331, the air guide surface 1334, and the fastening surface 1335 to a front surface of the face cover portion 131.

[0174] Further, the housing portion 133 further includes a bottom surface 1333 that connects lower ends of the seating surface 1331, the air guide surface 1334, and the fastening surface 1335 to the front surface of the face cover portion 131.

[0175] In detail, a mounting guide 1332a, a fixing guide 1332b, and a hinge hole 1332c are respectively formed at the top surface 1332 and the bottom surface 1333 of the housing portion 133.

[0176] The mounting guide 1332a is provided in a rib shape that extends a prescribed length in a front surface direction from the back surface of the mask body 11. The fixing guide 1332b is provided in a protrusion shape that protrudes at a position spaced apart in a center direction of the mask body 11 from the mounting guide 1332a.

[0177] Additionally, the hinge hole 1332c is provided as an elongated hole formed at a position spaced apart from the mounting guide 1332a towards the side end of the mask body 11. The hinge hole 1332c is for the hinge 346 of the filter housing 34 (see reference). Figure 17 The insertion hole can be non-circular in shape; for example, it can be an elongated hole in the shape of an ellipse.

[0178] Furthermore, the hinge hole 1332c can extend obliquely in a direction that gets closer to the back of the mask body 11 as it moves towards the side end of the mask body 11. That is, when the hinge hole 1332c is designed to be elliptical, the distance from one end of the hinge hole 1332c near the center of the mask body 11 to the back of the mask body 11 can be designed to be greater than the distance from the other end of the hinge hole 1332c near the side end of the mask body 11 to the back of the mask body 11.

[0179] The reason for the hinge hole 1332c extending obliquely in the form of an elongated hole is to avoid interference between the filter housing 34 and the rear flange 325 of the flow guide 32 when the end of the filter housing 34 is rotated in order to separate the filter 33.

[0180] Specifically, the fastening hook 344 of the filter housing 34 (see reference) Figure 17 When the filter housing 34 is rotated while separated from the filter hook 1338 protruding from the fastening surface 1335, it is pulled towards the side end of the mask body 11 while being rotated. Thus, the hinge 346 of the filter housing 34 moves and rotates from one end of the elongated hinge hole 1332c to the other end, becoming as follows: Figure 18 The state shown.

[0181] According to the structure of the hinge hole 1332c of the present invention, the filter housing 34 does not interfere with the rear flange 325, and the amount of rotation (or opening angle) of the filter housing 34 is greater compared to the case where the hinge hole 1332c is formed in a circular shape. As a result, it has the advantage of being able to install and detach the filter 33 more easily.

[0182] On the other hand, the fan module 31 includes a fan housing 311 and a fan 312. Furthermore, the fan housing 311 includes: a base 3111 disposed on a mounting surface 1331 of the receiving portion 133; and a protective cover 3112 protruding from the edge of the base 3111 at a predetermined height. The protective cover 3112 surrounds the edge of the base 311, and its central portion extends arcuately along the outer contour of the fan 312.

[0183] A PCB (Printed Circuit Board) F for driving a fan motor is provided in the base. The PCB includes a flexible PCB (Flexible PCB).

[0184] The shroud 3112 extends in a straight line from one side edge of one end of the base 3111, and then extends in an arc with a prescribed curvature along the outer contour of the fan 313 at a certain position, and then extends in a straight line to the other side edge of one end of the base 3111.

[0185] An inner surface of one side end of the shroud 3112 is projected with a guide protrusion 3113, and air is rotated in the direction of rotation of the fan from the space between the guide protrusion 3113 and the fan 312 and is discharged to the side end side of the shroud 3112 facing the guide protrusion 3113.

[0186] A portion in which the guide protrusion 3113 is formed, that is, a portion in which rotation of air starts, can be defined as an inlet a, and a portion in which air is discharged along the shape of the shroud 3112 can be defined as an outlet b.

[0187] Air discharged from the outlet b is supplied to the face of the user through the discharge port 101.

[0188] On the other hand, in a state in which the fan module 31 is installed in the accommodation portion 133, the flow guide 32 is disposed at the back of the fan module 31. That is, the flow guide 32 is disposed at the rear end of the shroud 3112.

[0189] The flow guide 32 includes a fixed plate 321 covering the open back of the fan housing 311, a duct flange 324 bent and extended from one end of the fixed plate 31, an upper flange 322 bent and extended from the upper end of the fixed plate 321 and the duct flange 324, a lower flange 323 bent and extended from the lower end of the fixed plate 321 and the duct flange 324, and a rear flange 325 extended from the end of the duct flange 324 in a direction crossing the duct flange 324.

[0190] The other end of the fixed plate 321 is in close contact with the fastening surface 1335 of the accommodation portion 133. In addition, a communication hole 3211 is formed in the fixed plate 321, and the communication hole 3211 functions as an inlet of the fan module 31.

[0191] The upper flange 322 includes a fixed upper flange 3221, a duct upper flange 3222, and a guide shoulder 3223.

[0192] The upper fixing flange 3221 is bent perpendicularly from the upper end of the fixing plate 321 and extends with a prescribed width. The upper pipe flange 3222 is bent perpendicularly from the upper end of the pipe flange 324 and extends with a prescribed width. The upper fixing flange 3221 and the upper pipe flange 3222 are integrated and configured in an L shape.

[0193] The lower flanges 323 include a lower fixing flange 3231, a lower pipe flange 3232, and a guide shoulder 3233.

[0194] The lower fixing flange 3231 is bent perpendicularly from the lower end of the fixing plate 321 and extends with a prescribed width. The lower pipe flange 3232 is bent perpendicularly from the lower end of the pipe flange 324 and extends with a prescribed width.

[0195] The upper flanges 322 and the lower flanges 323 are configured in a symmetrical shape with respect to a line or a plane that equally divides the fixing plate 321 vertically.

[0196] The guide shoulders 3223, 3233 will be described in further detail later with reference to the accompanying drawings.

[0197] The upper flanges 322 are in close contact with the top surface 1332 of the accommodation portion 133, and the lower flanges 323 are in close contact with the bottom surface 1333 of the accommodation portion 133. In addition, in a case where the flow guide 32 is seated in the accommodation portion 133, as shown in FIG. 6, the pipe flange 324 forms the back surface of the air passage 102, and the air guide surface 1334 of the accommodation portion 133 forms the front surface of the air passage 102. Figure 4

[0198] In a case where the flow guide 32 is installed in the accommodation portion 133, the rear flange 325 forms a part of the back surface of the mask body 11. In addition, one side end portion of the rear flange 325 is in contact with the end portion of the filter housing 34, and the other side end portion of the rear flange 325 forms the side end portion of the discharge port 101.

[0199] In detail, the discharge port 101 defined as the outlet end of the air passage 102 can be understood as being defined by the end portion of the air guide surface 1334 constituting the accommodation portion 133 and the other side end portion of the rear flange 325.

[0200] In addition, a space in which the filter 33 is accommodated is defined by the fixing plate 321, the pipe flange 324, the upper flanges 322, the lower flanges 323, and a part of the rear flange 325.

[0201] ​The upper flange 322 and the lower flange 323 support a portion of the upper side and a portion of the lower side among the four sides of the filter 33, respectively, thereby being able to prevent the filter from moving in the up-and-down direction in a state in which the user wears the mask device 10.

[0202] In addition, the duct flange 324 includes a filter support surface 3241 bent and extended from the side end portion of the fixing plate 321 and supporting a portion of the side of the filter 33, a bent surface 3242 bent and extended from the end portion of the filter support surface 3241, and an air guide surface 3243 curved with a prescribed curvature from the end portion of the bent surface 3242.

[0203] The air guide surface 3243 of the duct flange 324 is formed at a position facing the air guide surface 1334 constituting the accommodation portion 133, and can be understood as defining the front surface and the back surface of the air passage 102 by the two air guide surfaces 3243, 1334.

[0204] With the arc-shaped shape of the air guide surface 3243, the air passage 102 can be configured in a form in which the cross-sectional area thereof increases closer to the discharge port 101 from the suction port communicating with the discharge port of the fan module 31.

[0205] On the other hand, a guide groove 3201 and a fixing groove 3202 are formed on each of the duct upper flange 3222 of the upper flange 322 and the duct lower flange 3232 of the lower flange 323.

[0206] The guide groove 3201 is formed from the bent surface 3242 to a certain position spaced downward from the rear flange 325. When the flow guide 32 is installed to the accommodation portion 133, the installation guide 1332a is slidingly inserted into the guide groove 3201.

[0207] Here, the installation guide 1332a can also be formed on the duct upper flange 3222 of the flow guide 32, and the guide groove 3201 can also be formed on the top surface 1332 and the bottom surface 1333 of the accommodation portion 133, respectively.

[0208] By inserting the installation guide 1332a into the guide groove 3201, it is possible to prevent the phenomenon of leakage of a portion of the air discharged from the fan module 31 to the air passage 102. Specifically, it is possible to prevent the phenomenon of leakage of a portion of the air discharged to the air passage 102 through the gap between the top surface 1332 of the accommodation portion 133 and the upper flange 322 of the flow guide 32 and the gap between the bottom surface 1333 of the accommodation portion 133 and the lower flange 323 of the flow guide 32.

[0209] In addition, the fixing guide 1332b is inserted into the fixing groove 3202 in an interference fit, so that the flow guide 32 can be coupled to the accommodation portion 133 without shaking. Of course, the positions of the fixing guide 1332b and the fixing groove 3202 can be interchanged like the mounting guide 1332a and the guide groove 3201.

[0210] On the other hand, a fan support rib 3212 can be formed on the front surface of the fixing plate 321, i.e., the surface covering the open surface of the fan case 311.

[0211] In detail, the fan support rib 3212 protrudes along the shape of the shroud 3112 constituting the fan case 311, and extends along the outer side surface of the shroud 3112, thereby being able to stably support the fan case 311. The communication hole 3211 is formed in the inner side area of the fan support rib 3212.

[0212] In addition, the front surface edge of the fixing plate 321 corresponding to the outer side area of the fan support rib 3212 can protrude a fan fixing protrusion 327. The fan fixing protrusion 327 can include a first fan fixing protrusion formed at the upper side corner of the outer side end portion of the fixing plate 321, and a second fan fixing protrusion formed at the lower side corner of the outer side end portion of the fixing plate 321. The outer side end portion of the fixing plate 321 can be understood as the end portion in close contact with the fastening surface 1335 of the accommodation portion 133.

[0213] In addition, a fastening protrusion 328 can protrude at a position spaced apart from the fan fixing protrusion 327. The fastening protrusion 328 can be understood as a unit for fixing the flow guide 32 to the seating surface 1331 of the accommodation portion 133.

[0214] The fastening protrusion 328 can include a first fastening protrusion formed at a position spaced apart from the first fan fixing protrusion, and a second fastening protrusion formed at a position spaced apart from the second fan fixing protrusion. It is noted that the number of the fastening protrusion 328 and the fan fixing protrusion 327 is not limited to the illustrated embodiment.

[0215] In addition, the outer side edge of the front surface of the fixing plate 321, i.e., the area adjacent to the outer side end portion of the fixing plate 321, can protrude a fastening hook 329. The fastening hook 329 is engaged with the flow guide hook 1339 protruding from the fastening surface 1335 of the accommodation portion 133, to prevent disassembly of the flow guide 32.

[0216] Here, the fastening hooks 329, the fastening posts 328, and the fan fixing posts 327 can be symmetrically formed with respect to a line that bisects the fixing plate 321 vertically.

[0217] On the other hand, if the base 3111 is bent during manufacturing of the base 3111, or pressure is applied to the fixing plate 321 of the flow guide 32, the PCB (Printed Circuit Board) F of the fan module 31 can be broken due to interference with the fixing plate 321, or the blades of the fan 312 can generate noise due to contact with the fixing plate 321.

[0218] To prevent such a phenomenon, a bending prevention post 326 can be protruded from the front side of the fixing plate 321. Specifically, the bending prevention post 326 is protruded from the front edge of the fixing plate 321 adjacent to the duct flange 324.

[0219] In addition, to prevent the flow of air discharged from the fan module 31 from being obstructed by the bending prevention post 326, the bending prevention post 326 is preferably formed in the edge of the front edge of the fixing plate 321 corresponding to the inlet a side of the fan module 31.

[0220] Therefore, in the case where the flow guide 32 is disposed in the shroud 3112 of the fan module 31, the end of the bending prevention post 326 will be in contact with the surface of the base corresponding to the inlet a region (see the dotted circle in Figure 15

[0221] With the bending prevention post 326, the phenomenon of interference of the PCB (Printed Circuit Board) F or the generation of noise due to contact of the blades of the fan 312 with the fixing plate 321 due to bending of the base 3111 or external force applied to the fixing plate 321 can be prevented.

[0222] Here, it is not excluded that the bending prevention posts 326 are formed on the front upper and lower edges of the fixing plate 321, respectively. That is, two bending prevention posts 326 can be protruded from positions symmetric to each other and in contact with the inlet a region and the outlet b region.

[0223] Figure 17 is a cross-sectional perspective view of a filter housing according to an embodiment of the present application.

[0224] Referring to Figure 17 ​The front surface of the filter housing 34 of the embodiment of the present application faces the back surface of the filter 33 disposed at the back surface of the flow guide 32, and the back surface of the filter housing 34 forms a part of the back surface of the mask body 11. That is, the back surface of the filter housing 34 faces the face of the user when the user wears the mask device 10.

[0225] In detail, the filter housing 34 includes a filter frame 341 surrounding three side surfaces of the filter 33, and a filter cover 342 formed at the back surface of the filter frame 341.

[0226] The filter cover 342 can be described as including a cover body 342a formed with the suction port 343, the filter frame 341 extending at the front surface of the cover body 342a, and an extension 342b extending from one side end of the cover body 342a.

[0227] The extension 342b can be gently curved in a manner to be adapted to the contour of the back surface of the mask body 11. The locking groove 3421 can be formed at the end of the extension 342b. In the case where the filter cover 342 is closed, the locking groove 3421 is engaged with the locking groove 1337 (refer to FIG. 13) formed at the side end of the rear body 13. Figure 14

[0228] In addition, the fastening hook 344 is protruded at the front central portion of the extension 342b. If the filter cover 342 is closed, the fastening hook 344 is engaged with the filter hook 1338, so that the filter cover 342 is fixedly combined with the rear body 13 (refer to FIG. 13). Figure 22

[0229] In the case where the filter cover 342 is closed, the back surface of the filter cover 342 forms a part of the back surface of the rear body 13 or a part of the back surface of the mask body 11. That is, the part of the rear body 13 defining the back surface of the accommodation portion 133 except the opening portion and the filter cover 342 complete the back surface of the mask body 11.

[0230] Hinges 346 are protruded at both side surfaces of the inner end of the filter housing 34, that is, the end opposite to the extension 342b. The hinges 346 are inserted into the hinge holes 1332c formed in the shape of a long hole, and the hinges 346 move between one end and the other end of the hinge holes 1332c during the opening and closing of the filter housing 34.

[0231] ​​In detail, the filter frame 341 includes a side frame 3411 extending forward from a side end of the cover body 342a, a top frame 3412 extending forward from an upper end of the cover body 342a, and a bottom frame formed on the opposite side of the top frame 3412. Thus, the filter frame 341 surrounds only three sides of the filter 33.

[0232] A guide groove 3414 is formed in the top frame 3412 and the bottom frame, and the guide shoulder 3223, 3233 of the flow guide 32 is received in the guide groove 3414. When the filter case 34 is closed after the filter is inserted, the fastening hook 344 of the filter case 34 is gently hooked to the filter hook 1338 through the engagement of the guide groove 3414 and the guide shoulder 3223, 3233. This will be described in detail later with reference to the drawings.

[0233] In addition, the side frame 3411 can also be described as a boundary surface that divides the filter cover 342 into the cover body 342a and the extension 342b.

[0234] Figures 18 to 22 FIG. 7 is a cross-sectional view sequentially showing the closing process of the filter case according to an embodiment of the present application.

[0235] Referring to Figures 18 to 22 As described above, the hinge 346 of the filter case 34 is inserted into the hinge hole 1332c in the form of an obliquely extending long hole.

[0236] In detail, the user grabs the end of the extension 342b and lifts it up to separate the fastening hook 344 of the filter case 34 from the filter hook 1338. If the fastening hook 344 is separated from the filter hook 1338, the user grabs the end of the extension 342b and lifts it up while pulling it toward the side end of the mask body 11. Then, the hinge 346 moves from one end of the hinge hole 1332c to the other end, and the opening angle of the filter case 34 will increase. As a result, the filter case 34 is opened without interfering with the rear flange 325 of the flow guide 32.

[0237] Figure 18 FIG. 8 is a cross-sectional view showing a state in which the filter case 34 is maximally opened, that is, a state in which the hinge 346 is located at the other end of the hinge hole 1332c.

[0238] In this state, if the filter housing 34 is closed before the hinge 346 contacts one end of the hinge hole 1332c, the engaging portion 3442 of the fastening hook 344 may slide along the outer surface of the filter hook 1338, preventing the hook from engaging. Furthermore, if the user closes the filter housing 34 with excessive force, the fastening hook 344 may break.

[0239] The present invention provides a structure that allows the fastening hook 344 to be accurately engaged with the filter hook 1338 even when the user performs the action of closing the filter housing 34 before the hinge 346 is pushed in to contact one end of the hinge hole 1332c.

[0240] As an example, guide shoulders 3223 and 3233 protrude in an arcuate manner from the flow guide 32, and guide grooves 3414 are formed on the side of the filter housing 34. Furthermore, if the filter housing 34 is closed, the guide grooves 3414 slide along the arcuate surfaces of the guide shoulders 3223 and 3233, and during this process, the guide shoulders 3223 and 3233 accurately engage with the guide grooves 3414, thereby engaging the engaging portion 3442 of the fastening hook 344 with the inner side of the filter hook 1338.

[0241] like Figures 18 to 22 As shown, as the opening angle of the filter housing 34 gradually decreases, the guide groove 3414 moves towards the position where it engages with the guide shoulders 3223 and 3233. Simultaneously, the hinge 346 moves from one end of the hinge hole 1332c to the other.

[0242] Figure 23 This is a cross-sectional perspective view of the filter housing according to another embodiment of the present invention.

[0243] Reference Figure 23 In another embodiment of the present invention, the top frame 3412 and the bottom frame 3413 of the filter housing 34 are not separately formed with guide grooves, and the flow guide 32 is not formed with guide shoulders.

[0244] However, the end shape of the fastening hook 344 is improved so that the fastening hook 344 and the filter hook 3818 are securely fastened when the filter housing 34 is closed.

[0245] In detail, the fastening hook 344 includes: an extension 3441 extending from the filter cover 342; and an engaging portion 3442 formed at the end of the extension 3441.

[0246] The engaging portion 3442 includes an engaging surface 3442a inclined toward the outer edge side of the filter case 34, a sliding surface 3442b extending linearly from the end of the engaging surface 3442a, and a contact surface 3442c curved with a prescribed curvature from the end of the sliding surface 3442b.

[0247] The contact surface 3442c is a surface that first comes into contact with the filter hook 1338 when the filter case 34 is closed.

[0248] Figures 24 to 28 FIG. 7 is a cross-sectional view sequentially showing a closing process of a filter case according to another embodiment of the present application.

[0249] Referring to Figures 24 to 28 In a state in which the filter case 34 is opened, the hinge 346 is in a state of being hooked by the other end of the hinge hole 1332c.

[0250] In this state, if the user rotates the filter case 34 in a state in which the end of the filter case 34 on the side of the hinge 346 is not pushed, that is, pushes the filter case 34 in the direction of the arrow of FIG. 7 to close it, the tip of the filter hook 1338 comes into contact with the contact surface 3442c as shown in FIG. 8. Figure 24 Figure 26

[0251] In a state in which the tip of the filter hook 1338 comes into contact with the contact surface 3442c, if the back of the filter case 34 is further pressed, the tip of the filter hook 1338 moves along the contact surface 3442c and reaches the sliding surface 3442b as shown in FIG. 9. As the tip of the filter hook 1338 moves along the contact surface 3442c and the sliding surface 3442b, the hinge 346 moves toward the one end side of the hinge hole 1332c. Figure 27

[0252] In this state, when the back of the filter case 34 is completely closed, the inside surface of the filter hook 1338 comes into contact with the engaging surface 3442a with a "click" sound, so that the engaging portion 3442 is engaged with the filter hook 1338.

[0253] With the shape of the engaging portion 3442 of the fastening hook 344, when the user closes the filter case 34, a phenomenon in which the end of the fastening hook 344 slides along the outside surface of the filter hook 1338 to cause the fastening hook 344 to be broken does not occur.​​​

Claims

1. A facemask device, wherein, includes: a mask body including a front body and a rear body combined at the back of the front body, a pair of receiving portions protruding forward from the rear body; a face guard combined at the back of the rear body and closely adhered to the face of a user, a breathing space formed at the inner side of the face guard; a fan module disposed at the receiving portions; a flow guide configured at the back of the fan module, forming a part of a discharge outlet in communication with the breathing space; a filter disposed at the flow guide; and a filter housing rotatably coupled to the rear body, covering the filter, the flow guide includes: a fixing plate covering the back of the fan module; a duct flange bent and extended from one end of the fixing plate; an upper flange bent and extended from the upper end of the fixing plate and the duct flange; a lower flange bent and extended from the lower end of the fixing plate and the duct flange; and a rear flange formed at the end of the duct flange, forming a part of the back of the mask body, guide shoulders protruding with a curvature are formed at the upper flange and the lower flange, respectively, the filter housing includes: a pair of filter frames extended in parallel with each other in a state of facing each other; a filter cover coupled to the back of the pair of filter frames; a hinge extended from the edge of each of the pair of filter frames; and a fastening hook extended from the side end of the filter housing opposite to the side end where the hinge is formed, engaged with a filter hook formed on the pair of receiving portions, guide grooves engaged with the guide shoulders are formed at the pair of filter frames, respectively. 2.The mask device according to claim 1, wherein the pair of receiving portions each include: a fastening surface extended forward from the side end of the rear body, the filter hook protruding at the back of the fastening surface; a disposing surface extended from the end of the fastening surface toward the center direction of the rear body, the filter disposed at the back of the disposing surface; an air guide surface coupled to the end of the disposing surface and the front surface of the rear body; a top surface coupled to the upper end of the fastening surface, the disposing surface, and the air guide surface and the front surface of the rear body; and a bottom surface coupled to the lower end of the fastening surface, the disposing surface, and the air guide surface and the front surface of the rear body. 3.The mask device according to claim 2, wherein hinge holes in the form of long holes into which the hinge is inserted are formed at the top surface and the bottom surface, respectively, the hinge hole extends from the front end of the top surface to the rear end side, and is inclined to extend in a direction in which the rear end is closer to the side end of the rear body. 4.The mask device according to claim 3, wherein an air passage is formed by the air guide surface and the duct flange, the upper flange includes: a fixed upper flange bent and extended from the upper end of the fixing plate; and a duct upper flange bent and extended from the upper end of the duct flange, the lower flange includes: a fixed lower flange bent and extended from the lower end of the fixing plate; and a duct lower flange bent and extended from the lower end of the duct flange, The guide shoulders are formed at the fixed upper and lower flanges, respectively. 5.The mask device of claim 4, wherein The guide shoulders and the guide grooves are formed closer to the hinge than the fastening hooks. 6.The mask device of claim 4, wherein An air suction hole for suctioning external air is formed in the filter cover, The air suction hole is a set of plural holes different in size from each other. 7.The mask device of claim 6, wherein An air discharge hole for discharging the suctioned external air to the breathing space is formed at an end of the air passage.

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