Breathing mask for laboratory

Abstract

The utility model discloses a breathing mask for a laboratory, which comprises a mask main body provided with an air inlet channel, an air outlet channel and a fixing band used for fixing the mask main body on the head of a human body; the first-stage filtering device comprises a filtering box which is movably and adjustably arranged at the front end of the air inlet channel, a filtering cavity is defined in the filtering box, the filtering cavity is filled with a filtering material, air holes are formed in the front side and the rear side of the filtering cavity, the filtering box at least has a first state and a second state in the adjusting process, in the first state, the filtering box closes the air inlet channel, and in the second state, the filtering box closes the air inlet channel; and in the second state, the filter cartridge at least partially opens the air inlet channel. According to the breathing mask for the laboratory, when an operator leaves a working area for a short time, the filter box can be adjusted to be in the second state, air can directly enter the breathing mask from the front end of the air inlet channel, therefore, breathing resistance is reduced, the mask does not need to be worn repeatedly, operation is convenient, and meanwhile the inner side of the mask body is not prone to being polluted.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a breathing mask for laboratory use. Background Art

[0002] In a laboratory environment, operators often need to contact various toxic and harmful gases, such as methanol, acetonitrile, etc., and long-term contact with these gases poses a serious threat to the health of laboratory personnel. For this reason, operators often need to wear gas masks or breathing masks to filter out toxic gases. Existing breathing masks or gas masks usually have greater resistance when breathing because they need to have stronger filtering capabilities. One disadvantage brought about by this is that when the operator temporarily leaves the work area, since they are away from toxic gases, they no longer need to filter the air at a high level. In order to reduce breathing resistance, they often need to take off the mask and put it on again when they return to the work area. On the one hand, unlike ordinary masks, breathing masks or gas masks are more troublesome to wear. On the other hand, repeatedly taking and wearing masks can easily cause pollution to the inside of the mask. Therefore, there is an urgent need for a mask that can reduce breathing resistance when leaving the work area and is easy to operate and not easy to cause pollution to the inside of the mask. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a laboratory breathing mask, in which an operator can adjust a filter box to reduce breathing resistance when leaving the working area, and the operation is convenient and it is not easy to cause pollution to the inside of the mask.

[0004] The laboratory breathing mask according to the embodiment of the utility model comprises:

[0005] A mask body, provided with an air inlet channel and an air outlet channel and a fixing belt for fixing the mask body to a human head;

[0006] The primary filtering device includes a filter box movably and adjustably arranged at the front end of the air inlet channel, the filter box defines a filter cavity, the filter cavity is filled with filter material, and air holes are provided on the front and rear sides of the filter cavity. The filter box has at least a first state and a second state during adjustment. In the first state, the filter box closes the air inlet channel, and in the second state, the filter box at least partially opens the air inlet channel.

[0007] The laboratory breathing mask according to the embodiment of the utility model has at least the following beneficial effects:

[0008] By arranging an adjustable filter box at the front end of the air inlet channel of the mask body, the filter cavity in the filter box is filled with filter material, and the filter box can be movably adjusted to close the front end of the air inlet channel, and can also be adjusted to at least partially open the front end of the air inlet channel. Therefore, when the operator is in the working area, the filter box can be adjusted to a state of closing the air inlet channel, so that the air is filtered by the filter material in the filter box and then absorbed by the human body. When the operator leaves the working area for a short time, the filter box can be adjusted to a state of at least partially opening the air inlet channel, so that air can directly enter from the front end of the air inlet channel, thereby reducing breathing resistance and eliminating the need to repeatedly wear the mask. It is easy to operate and is not easy to cause pollution to the inner side of the mask body.

[0009] According to some embodiments of the utility model, the mask body is provided with a mounting post on the front side of the air inlet passage, and the mounting post is distributed along the extension direction of the air inlet passage. The filter box is provided with a sleeve hole on the outer side of the filter cavity and is sleeved on the mounting post through the sleeve hole. The filter box can slide along the axial direction of the mounting post and can rotate around the central axis of the mounting post. An elastic member is provided between the mounting post and the filter box, and the elastic member is used to apply a backward elastic force to the filter box to keep the filter box closing the air inlet passage when the filter box is in the first state.

[0010] According to some embodiments of the utility model, an embedding portion adapted to the air inlet passage is provided at the rear end of the filter box, and the embedding portion is arranged in a ring shape. When the filter box is in the first state, the embedding portion is embedded in the air inlet passage to limit the rotation of the filter box.

[0011] According to some embodiments of the utility model, the elastic member is configured as a compression spring, which is sleeved on the mounting column and located on the front side of the filter box, and the mounting column is provided with a detachable abutment structure on the front side of the compression spring for abutting against the front end of the compression spring.

[0012] According to some embodiments of the utility model, the abutment structure includes an abutment ring plate and a limiting nut, the abutment ring plate is sleeved on the mounting column, and the limiting nut is threadedly connected to the mounting column and is located on the front side of the abutment ring plate.

[0013] According to some embodiments of the utility model, a protective tube is provided at the front end of the filter box, the front end of the protective tube protrudes from the mounting column, and the compression spring and the limiting nut are both located on the inner side of the protective tube.

[0014] According to some embodiments of the present invention, a secondary filter device is further included in the air intake passage, wherein the secondary filter device includes a filter layer, and the material of the filter layer includes at least non-woven fabric.

[0015] According to some embodiments of the utility model, the side wall of the air inlet passage is provided with an annular mounting portion, one side of the mounting portion is detachably connected with an annular clamping plate, and the filter layer is sandwiched between the clamping plate and the mounting portion.

[0016] According to some embodiments of the utility model, the filter box includes a box body and a box cover, the box body is movably and adjustably arranged at the front end of the air inlet channel, and the box cover is threadedly connected to the front end of the box body and defines the filter cavity between the box body and the box cover.

[0017] According to some embodiments of the utility model, a micro fan is provided in the air outlet channel, and the micro fan is used to discharge the air at the rear side of the air outlet channel forward.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 It is a schematic diagram of the installation structure of an embodiment of the utility model;

[0021] Figure 2 It is a schematic structural diagram of the filter box of the embodiment of the utility model in the second state;

[0022] Figure 3 It is a longitudinal cross-sectional schematic diagram of an embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the exploded installation structure of the filter box, the filter layer and the mask body of the embodiment of the utility model.

[0024] Figure Number:

[0025] The mask body 100, the air inlet channel 101, the air outlet channel 102, the fixing belt 110, the mounting column 120, the abutting ring plate 130, the limiting nut 140, the mounting portion 150, the clamping hole 151, the clamping plate 160, the clamping block 161, and the micro fan 170;

[0026] Filter box 200, filter cavity 201, filter material 202, sleeve hole 203, embedded part 210, protective tube 220, ear plate 221, box body 230, base plate 231, installation tube 232, box cover 240;

[0027] Elastic member 300;

[0028] Filter layer 400. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Reference Figures 1 to 4 As shown, a laboratory breathing mask according to an embodiment of the utility model comprises: a mask body 100 and a primary filtering device.

[0034] The mask body 100 is provided with an air inlet channel 101 and an air outlet channel 102. Specifically, in the present embodiment, the air inlet channel 101 extends front to back and extends to the inner side of the mask body 100 for air intake, and the air outlet channel 102 is used for exhaust. In addition, the mask body 100 is also provided with a fixing strap 110 for fixing the mask body 100 to the human head. It can be understood that the fixing strap 110 adopts an elastic strap, and the fixing strap 110 can have a variety of structural forms. For example, two fixing straps 110 can be provided, which are respectively located on the left and right sides of the mask body 100, and the buckles of the fixing straps 110 can be adjusted to adapt to different head shapes. The fixing strap 110 can also be other structural forms as long as it meets the requirements of being elastic and adjustable. This is a conventional technical means, so it will not be elaborated here.

[0035] The primary filtering device includes a filter box 200 movably and adjustably arranged at the front end of the air inlet channel 101, a filter chamber 201 is defined in the filter box 200, the filter chamber 201 is filled with filter material 202, and air holes penetrating the filter box 200 are provided on both the front and rear sides of the filter chamber 201. The filter box 200 has at least a first state and a second state during the adjustment process. In the first state, the filter box 200 closes the air inlet channel 101, and in the second state, the filter box 200 at least partially opens the air inlet channel 101. It can be understood that when the filter box 200 is in the first state, air enters the filter chamber 201 through the air holes on the front side of the filter chamber 201, is filtered and processed by the filter material 202 in the filter chamber 201, and then enters the air inlet channel 101 through the air holes on the rear side of the filter chamber 201, thereby entering the inner side of the mask body 100 and being absorbed by the human body; and when the filter box 200 is in the second state, air can directly enter the air inlet channel 101 from the front end of the air inlet channel 101, thereby being absorbed by the human body. In some specific embodiments, the filter material 202 is a composite material of activated carbon and molecular sieve, which can efficiently adsorb and filter harmful substances such as toxic gases and particulate matter.

[0036] In a laboratory breathing mask according to an embodiment of the utility model, a movably adjustable filter box 200 is provided at the front end of the air inlet channel 101 of the mask body 100, and the filter cavity 201 in the filter box 200 is filled with filter material 202. The filter box 200 can be movably adjusted to close the front end of the air inlet channel 101, and can also be adjusted to at least partially open the front end of the air inlet channel 101. Therefore, when the operator is in the working area, the filter box 200 can be adjusted to close the air inlet channel 101, so that the air is filtered by the filter material 202 in the filter box 200 and then absorbed by the human body. When the operator leaves the working area for a short time, the filter box 200 can be adjusted to at least partially open the air inlet channel 101, so that the air can directly enter from the front end of the air inlet channel 101, thereby reducing the breathing resistance, and there is no need to repeatedly wear the mask. It is convenient to operate and is not easy to cause pollution to the inner side of the mask body 100.

[0037] It should be noted that, in order to fit the human face and improve comfort, a pad (not shown) is also provided on the inner side of the mask body 100. This is a conventional technical means, so it will not be elaborated here.

[0038] Reference Figure 1 , Figure 3 and Figure 4As shown, it can be understood that the mask body 100 is provided with a mounting post 120 on the front side of the air inlet channel 101, and the mounting post 120 is distributed along the extension direction of the air inlet channel 101. In this embodiment, the air inlet channel 101 extends front and back, and the mounting post 120 is distributed front and back; in addition, the filter box 200 is provided with a sleeve hole 203 on the outer side of the filter cavity 201 and is sleeved on the mounting post 120 through the sleeve hole 203. The mounting post 120 is set to a cylindrical shape, and the sleeve hole 203 is set to a cylindrical hole, so that the filter box 200 can slide along the axial direction of the mounting post 120 and can rotate around the central axis of the mounting post 120. An elastic member 300 is provided between the mounting post 120 and the filter box 200. The elastic member 300 is used to apply a backward elastic force to the filter box 200 to keep the filter box 200 closing the air inlet channel 101 when the filter box 200 is in the first state; further, the rear end of the filter box 200 is provided with a sleeve hole 203 connected to the air inlet channel 1 01 is adapted to embed the embedded part 210, and the embedded part 210 is set to be annular. When the filter box 200 is in the first state, the embedded part 210 is embedded in the air inlet channel 101, and the outer peripheral wall of the embedded part 210 is in contact with the side wall of the air inlet channel 101 to limit the rotation of the filter box 200. In this way, the filter box 200 can have a stable structure in the first state, avoiding the problem of the filter box 200 rotating due to accidental touching of the filter box 200; wherein, when the filter box 200 needs to be adjusted to the second state, a forward external force greater than the elastic force of the elastic member 300 is applied to the filter box 200, so that the embedded part 210 is disengaged from the air inlet channel 101, and then the filter box 200 is rotated to make the filter box 200 at least partially open the air inlet channel 101, that is, the filter box 200 is switched between the first state and the second state by sliding and rotating the filter box 200, and the structure is simple, stable and easy to operate. It is understandable that the air holes on the rear side of the filter box 200 are all located in the inner area of ​​the embedding portion 210. In addition, in order to facilitate the embedding portion 210 to be embedded in the air inlet channel 101, the rear end of the embedding portion 210 is provided with a chamfer.

[0039] Reference Figure 1 , Figure 3 and Figure 4As shown, it can be understood that the elastic member 300 is set as a compression spring, the compression spring is sleeved on the mounting column 120 and is located at the front side of the filter box 200, and the mounting column 120 is provided with a detachable abutment structure on the front side of the compression spring to abut against the front end of the compression spring, so that the compression spring can apply a rearward elastic force to the filter box 200 through the abutment structure and the filter box 200 abutting the front and rear ends of the compression spring, and the detachable abutment structure is provided to facilitate the operator to replace the compression spring. In some specific embodiments, the abutment structure includes an abutment ring plate 130 and a limiting nut 140, the abutment ring plate 130 is sleeved on the mounting column 120 and is used to abut against the compression spring, and the limiting nut 140 is threadedly connected to the mounting column 120 and is located at the front side of the abutment ring plate 130, so as to achieve the limiting support of the front end of the compression spring, when the compression spring needs to be removed, it is only necessary to unscrew the limiting nut 140 and then remove the abutment ring plate 130, which is convenient to operate. It is understandable that the mounting post 120 and the limiting nut 140 are both made of plastic. Obviously, in some other embodiments, the limiting nut 140 can also be replaced by a limiting pin, which is inserted into the mounting post 120 to limit the abutment against the ring plate 130.

[0040] Reference Figure 1 , Figure 3 and Figure 4 As shown, it can be understood that the front end of the filter box 200 is provided with a protective tube 220, the front end of the protective tube 220 protrudes from the mounting column 120, and the compression spring and the limit nut 140 are both located on the inner side of the protective tube 220. This arrangement can prevent the operator from touching the mounting column 120 or the limit nut 140 and other structures when adjusting the filter box 200 by hand and scratching the skin, thereby playing a protective role. It can be understood that the front end of the protective tube 220 is open to facilitate the removal of the limit nut 140 and the compression spring. In a further embodiment, in order to facilitate the operator to pull the filter box 200 forward, the front edge of the protective tube 220 is provided with ear plates 221 on two opposite sides. When the operator pulls the filter box 200 forward, the operator can use his fingers to press against the inner sides of the two ear plates 221 and pinch the protective tube 220 to apply external force to the filter box 200, thereby improving the convenience of operation.

[0041] Reference Figure 1 , Figure 3 and Figure 4As shown, it can be understood that the laboratory breathing mask of the embodiment of the utility model also includes a secondary filter device, which is arranged in the air inlet channel 101, and the secondary filter device includes a filter layer 400, and the filter layer 400 blocks the extension path of the air inlet channel 101. The material of the filter layer 400 includes at least non-woven fabric. By setting the filter layer 400, when the filter box 200 is adjusted to the second state to at least partially open the air inlet channel 101, the air passing through the air inlet channel 101 can be filtered by the filter layer 400. Obviously, although the operator has left the working area and left the toxic gas, the dust and droplets in the air may still carry bacteria and cause harm to human health. At this time, in order to prevent the operator's mouth and nose from being directly exposed to the atmosphere through the air inlet channel 101, a filter layer 400 is added in the air inlet channel 101. The material of the filter layer 400 includes at least non-woven fabric, which plays a role similar to a mask. In a further embodiment, the side wall of the air inlet passage 101 is provided with an annular mounting portion 150, and an annular clamping plate 160 is detachably connected to one side of the mounting portion 150, and the filter layer 400 is sandwiched between the clamping plate 160 and the mounting portion 150, so that the filter layer 400 is detachably arranged in the air inlet passage 101, so as to facilitate the removal and replacement of the filter layer 400. It is conceivable that in some specific embodiments, in order to facilitate disassembly and assembly, the clamping plate 160 can be clamped with the mounting portion 150, a plurality of clamping blocks 161 are provided on the clamping plate 160 and a plurality of clamping holes 151 are provided on the mounting portion 150, and the clamping blocks 161 and the clamping holes 151 are used to achieve the clamping of the clamping plate 160 and the mounting portion 150; of course, the clamping plate 160 and the mounting portion 150 can also be connected in other structural forms, which is a conventional technical means, so it will not be described in detail here.

[0042] Reference Figure 1 , Figure 3 and Figure 4As shown, it can be understood that the filter box 200 includes a box body 230 and a box cover 240. The box body 230 is movably and adjustably arranged at the front end of the air inlet channel 101, and the box cover 240 is threadedly connected to the front end of the box body 230 and defines a filter chamber 201 between the box body 230. In this way, the filter material 202 in the filter chamber 201 can be replaced by unscrewing the box cover 240, which is highly practical. In some specific embodiments, the box body 230 includes a base plate 231 and an annular mounting tube 232 fixed on the front side of the base plate 231, the sleeve hole 203 and the protective tube 220 are both provided on the base plate 231 and located on the outside of the mounting tube 232, the embedded portion 210 is provided on the rear end face of the base plate 231, the outer periphery of the mounting tube 232 is provided with an external thread, the inner periphery of the box cover 240 is provided with an internal thread to be threadedly connected with the mounting tube 232, and air holes are provided on the box cover 240 and the base plate 231; wherein, when the filter box 200 is in the first state, the base plate 231 abuts against the front end edge of the air intake channel 101 to close the air intake channel 101.

[0043] Reference Figure 1 , Figure 3 and Figure 4 As shown, it can be understood that a micro fan 170 is provided in the air outlet channel 102, and the micro fan 170 is used to discharge the air at the rear side of the air outlet channel 102 forward, so that the air circulation can be smoother and it is helpful for the operator to breathe. In this embodiment, two air outlet channels 102 are provided, which are located on the left and right sides of the air inlet channel 101. It can be understood that in order to prevent the air from passing through the air outlet channel 102 in the reverse direction, a breathing valve (not shown) can be provided in the air outlet channel 102 so that the air can only flow in one direction. It should be noted that the micro fan 170 has its own battery, and the switch of the micro fan 170 can be fixed on the front side of the mask body 100.

[0044] It is understandable that in order to improve safety performance, an intelligent monitoring device (not shown) can be set up. The intelligent monitoring device includes an electrically connected alarm light and a toxic gas concentration sensor. The toxic gas concentration sensor can be set on the inner side of the mask body 100 to detect the concentration of toxic gases, and the alarm light is used to sound an alarm when the toxic gas concentration sensor detects toxic gases exceeding the set value, so as to remind the operator to replace the filter material 202; it is understandable that there can be many types of toxic gases, such as methanol, acetonitrile, etc., and the toxic gas concentration sensor can be selected according to the type of toxic gas in the use environment.

[0045] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A laboratory breathing mask, characterized in that: include: A mask body (100) is provided with an air inlet channel (101) and an air outlet channel (102) and a fixing belt (110) for fixing the mask body (100) to a human head; A primary filtering device comprises a filter box (200) movably and adjustably arranged at the front end of the air inlet passage (101), wherein a filter cavity (201) is defined in the filter box (200), wherein the filter cavity (201) is filled with filter material (202), and air holes are arranged on both the front and rear sides of the filter cavity (201), wherein the filter box (200) has at least a first state and a second state during adjustment, wherein in the first state, the filter box (200) closes the air inlet passage (101), and in the second state, the filter box (200) at least partially opens the air inlet passage (101).

2. The laboratory breathing mask according to claim 1, characterized in that: The mask body (100) is provided with a mounting post (120) at the front side of the air inlet passage (101), and the mounting post (120) is distributed along the extension direction of the air inlet passage (101); the filter box (200) is provided with a sleeve hole (203) on the outer side of the filter cavity (201) and is sleeved on the mounting post (120) through the sleeve hole (203); the filter box (200) can slide along the axial direction of the mounting post (120) and can rotate around the central axis of the mounting post (120); an elastic member (300) is provided between the mounting post (120) and the filter box (200), and the elastic member (300) is used to apply a backward elastic force to the filter box (200) so as to keep the filter box (200) closing the air inlet passage (101) when the filter box (200) is in the first state.

3. The laboratory breathing mask according to claim 2, characterized in that: The filter box (200) is provided with an embedding portion (210) adapted to the air inlet passage (101) at the rear end thereof; the embedding portion (210) is arranged in a ring shape; when the filter box (200) is in the first state, the embedding portion (210) is embedded in the air inlet passage (101) to limit the rotation of the filter box (200).

4. The laboratory breathing mask according to claim 2, characterized in that: The elastic member (300) is configured as a compression spring, which is sleeved on the mounting column (120) and located at the front side of the filter box (200). The mounting column (120) is provided with a detachable abutment structure at the front side of the compression spring for abutting against the front end of the compression spring.

5. The laboratory breathing mask according to claim 4, characterized in that: The abutment structure comprises an abutment ring plate (130) and a limiting nut (140); the abutment ring plate (130) is sleeved on the mounting column (120); the limiting nut (140) is threadedly connected to the mounting column (120) and is located at the front side of the abutment ring plate (130).

6. The laboratory breathing mask according to claim 5, characterized in that: A protective tube (220) is provided at the front end of the filter box (200), the front end of the protective tube (220) protrudes from the mounting column (120), and the compression spring and the limiting nut (140) are both located on the inner side of the protective tube (220).

7. The laboratory breathing mask according to claim 1, characterized in that: It also includes a secondary filtering device disposed in the air intake passage (101), wherein the secondary filtering device includes a filtering layer (400), and the material of the filtering layer (400) includes at least non-woven fabric.

8. The laboratory breathing mask according to claim 7, characterized in that: The side wall of the air inlet channel (101) is provided with an annular mounting portion (150), one side of the mounting portion (150) is detachably connected to an annular clamping plate (160), and the filter layer (400) is clamped between the clamping plate (160) and the mounting portion (150).

9. The laboratory breathing mask according to claim 1, characterized in that: The filter box (200) comprises a box body (230) and a box cover (240); the box body (230) is movably and adjustably arranged at the front end of the air inlet passage (101); the box cover (240) is threadedly connected to the front end of the box body (230) and defines the filter cavity (201) between the box body (230) and the box cover (240).

10. The laboratory breathing mask according to claim 1, characterized in that: A micro fan (170) is provided in the air outlet channel (102), and the micro fan (170) is used to discharge the air at the rear side of the air outlet channel (102) forward.

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