Air inlet valve seat for half mask

Abstract

The utility model relates to the technical field of half masks, in particular to an air inlet valve seat for a half mask, which comprises a filter cotton bearing seat for connecting the half mask, an air flowing cavity for air flowing is arranged in the filter cotton bearing seat, and filter cotton and a limiting structure for limiting the filter cotton are arranged in the air flowing cavity. The filter cotton bearing seat is provided with an air suction valve diaphragm used for controlling overall air suction of the device and an air inlet used for sucking air, and the air inlet is communicated with the air flowing cavity. The filter cotton is fixedly limited in the air flowing cavity through the limiting structure, so that when air is sucked into the air inlet, the contact area of the air and the filter cotton is increased, and the utilization rate of the filter cotton is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of half-face respirators, in particular to an air inlet valve seat for a half-face respirator. BACKGROUND

[0002] A half-face respirator is one of the components of a gas mask, and is called in contrast to a full-face respirator. It is used to block the mouth and nose of a person from contacting the outside air, so as to isolate the face of the person from the outside polluted air. It is usually used in combination with an air inlet valve seat having a filter function, so as to play a breathing protection role.

[0003] The existing air inlet valve seat structure usually comprises a filter cotton receiving seat and a pressing cover buckled on the filter cotton receiving seat. A filter cotton is arranged between the filter cotton receiving seat and the pressing cover, and the filter cotton is pressed on the filter cotton receiving seat by the pressing cover. An air inlet is formed on the pressing cover, and a breathing valve diaphragm is arranged on the filter cotton receiving seat. In use, the filter cotton filters the air passing through the air inlet, so as to achieve the effect of filtering the air.

[0004] However, although the above-mentioned air inlet valve seat can filter the air in use, since the pressing cover, the filter cotton and the filter cotton receiving seat are in close contact, only the filtering performance of the filter cotton corresponding to the mouth and the surrounding area of the nose is fully used when the user breathes, and the rest of the filter cotton is difficult to be used. When the filter cotton corresponding to the mouth and the surrounding area of the nose loses the filtering performance after a long time of use, the filter cotton needs to be replaced as a whole. Since the upper part of the filter cotton is basically not fully utilized, the filter cotton is not fully used as a whole, and the use is not convenient. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the problem that the filter cotton in the existing air inlet valve seat is difficult to be fully utilized in use, the present application provides an air inlet valve seat for a half-face respirator.

[0006] The present application provides an air inlet valve seat for a half-face respirator, which adopts the following technical scheme:

[0007] An air inlet valve seat for a half-face respirator comprises a filter cotton receiving seat for connecting the half-face respirator. An air flow cavity for air flow is arranged in the filter cotton receiving seat. A filter cotton and a limiting structure for limiting the filter cotton are arranged in the air flow cavity. An air suction valve diaphragm for controlling the whole air suction of the device and an air inlet for sucking air are arranged on the filter cotton receiving seat. The air inlet is in communication with the air flow cavity.

[0008] By adopting the technical scheme, when in use, the filter cotton is fixed and limited in the air flow cavity through the limiting structure, so that when the user breathes, the air enters the air flow cavity through the air inlet and fully contacts the filter cotton, thereby improving the use area of the filter cotton, so that the filter cotton can be fully utilized.

[0009] Preferably, the filter cotton receiving seat comprises a seat body and a cover fixed on the seat body, one end of the cover is rotationally connected to the seat body, the seat body is provided with a clamping structure for clamping and fixing the cover, the air inlet is arranged on the cover, and the air inlet is arranged on the cover.

[0010] By adopting the technical scheme, when in use, the cover and the seat body are rotationally opened and buckled through the clamping structure, thereby facilitating the user to replace the filter cotton.

[0011] Preferably, the clamping structure comprises first and second elastic clamping blocks fixed on the seat body, the cover is provided with a clamping groove for embedding the first elastic clamping block, and the cover is fixed with a limiting block.

[0012] By adopting the technical scheme, when in use, the cover is rotated, the second elastic clamping block abuts against the limiting block after the first elastic clamping block is embedded in the clamping groove, thereby realizing clamping and fixing of the cover through cooperation of the first and second elastic clamping blocks, so as to ensure stability of the connection between the cover and the seat body.

[0013] Preferably, the limiting structure comprises a first compression convex ring fixed on the cover, the seat body is provided with a first ring groove, the first ring groove is arranged around the air flow cavity, the filter cotton is lapped around the first ring groove, and the first compression convex ring presses the filter cotton around the edge into the first ring groove.

[0014] By adopting the technical scheme, when in use, the first compression convex ring presses the side edge of the filter cotton into the first ring groove, so that the filter cotton is lapped on the side wall of the first ring groove, thereby making the filter cotton and the seat body have a certain spacing for air flow in the air flow cavity, so as to ensure that the filter cotton is fully utilized.

[0015] Preferably, the seat body is fixed with a plurality of support ribs for supporting the filter cotton, the plurality of support ribs are arranged at intervals in the air flow cavity, and an air flow channel is formed between adjacent two support ribs.

[0016] By adopting the technical scheme, when in use, the filter cotton is supported by the support ridges, and the air in the air flow cavity is guided by the air flow channels between the two support ridges, so that the filter cotton can be fully utilized.

[0017] Preferably, a positioning column is further fixed on the support ridge, and a positioning hole is formed on the filter cotton, and the positioning column and the positioning hole are in plug-in cooperation.

[0018] By adopting the technical scheme, when in use, the filter cotton is positioned on the support ridge through the cooperation of the positioning column and the positioning hole, so that the filter cotton is prevented from being inclined as a whole when the filter cotton edge is extruded by the first compression convex ring.

[0019] Preferably, a guide inclined surface is formed on the end of the positioning column away from the support ridge.

[0020] By adopting the technical scheme, when in use, the placement of the filter cotton is guided through the guide inclined surface, so that the positioning column and the positioning hole are aligned.

[0021] Preferably, an air inlet fence is arranged at the air inlet, and the opening of the air inlet fence is arranged to be inclined downward.

[0022] By adopting the technical scheme, when in use, the air inlet fence is arranged to reduce the dust entering the air inlet when the user breathes.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. Through the cooperation of the first compression convex ring, the first ring groove and the support ridge, when the filter cotton is installed in the air flow cavity, there is a certain distance between the filter cotton and the seat body, so that when the user breathes, the air enters the air flow cavity through the air inlet, and fully contacts the filter cotton in the air flow cavity, thereby increasing the use area of the filter cotton, and the filter cotton can be fully utilized.

[0025] 2. Through the cooperation of the first elastic clamping block, the clamping groove, the second elastic clamping block and the limiting block, the stability of the filter cotton after installation is ensured on the premise of realizing convenient replacement of the filter cotton.

[0026] 3. Through the cooperation of the positioning column and the positioning hole, when the filter cotton is assembled, the filter cotton is prevented from being inclined as a whole, and the filter cotton can be fully used. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the isometric view of the main embodiment of the present application, which mainly embodies the overall structure;

[0028] Figure 2This is an exploded view of the filter cotton receiving seat structure, which is the main feature of Embodiment 1 of this application;

[0029] Figure 3 This is an isometric schematic diagram of the snap-fit ​​structure, which is the main feature of Embodiment 1 of this application;

[0030] Figure 4 This is an isometric schematic diagram of the limiting structure, which is the main feature of Embodiment 1 of this application;

[0031] Figure 5 This is an isometric schematic diagram of the main overall structure in Embodiment 2 of this application;

[0032] Figure 6 This is an exploded view of the overall structure, which is the main feature of Embodiment 2 of this application.

[0033] Reference numerals in the attached drawings: 1. Filter cotton receiving seat; 11. Seat body; 111. First annular groove; 112. Supporting protrusion ring; 12. Cover; 121. Slot; 122. Limiting block; 13. Snap-fit ​​structure; 131. First elastic locking block; 132. Second elastic locking block; 2. Filter cotton; 21. Positioning hole; 3. Limiting structure; 31. First pressing protrusion ring; 4. Intake valve diaphragm; 5. Air inlet; 6. Supporting rib; 7. Positioning post; 8. Divider plate; 81. Second pressing protrusion ring; 82. Second annular groove. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail.

[0035] This application discloses an air intake valve seat for a half-face mask.

[0036] Example 1:

[0037] Reference Figure 1 and Figure 2 An air intake valve seat for a half-face mask includes a horizontally arranged filter cotton receiving seat 1, which is divided into a seat body 11 and a cover 12. The back of the seat body 11 is used to connect the half-face mask, and the front of the seat body 11 has an integrally formed airflow cavity. The cover 12 is fastened to the seat body 11 to block the airflow cavity. One end of the cover 12 is hinged to one end of the seat body 11. A snap-fit ​​structure 13 is provided on the seat body 11. In use, by rotating the cover 12, the cover 12 is fully fastened to the seat body 11, thereby blocking the airflow cavity. Finally, the cover 12 is snapped and fixed to the seat body 11 by the snap-fit ​​structure 13 to prevent the cover 12 from rotating during use.

[0038] Reference Figure 1 and Figure 3The clamping structure 13 is composed of a first elastic clamping block 131 and a second elastic clamping block 132, and the first elastic clamping block 131 and the second elastic clamping block 132 are integrally formed on the seat body 11. The first elastic clamping block 131 is provided with two first elastic clamping blocks 131, which are symmetrically arranged on both sides of the hinged end of the seat body 11 and the cover 12. The second elastic clamping block 132 is arranged at one end of the seat body 11 away from the hinged end of the cover 12. Clamping grooves 121 are formed on both sides of the cover 12 in the length direction. The clamping grooves 121 are clamped and matched with the first elastic clamping block 131. Limiting blocks 122 are integrally formed at one end of the cover 12 away from the hinged end. The limiting blocks 122 are in abutting cooperation with the second elastic clamping block 132. When the cover 12 is buckled on the seat body 11, the limiting blocks 122 should be located between the second elastic clamping block 132 and the seat body 11, and abut against the bottom side of the second elastic clamping block 132.

[0039] With reference to Figure 2 and Figure 4 An air inlet 5 is arranged on the cover 12, and an air inlet fence is arranged at the air inlet 5. The air inlet fence is integrally formed on the cover 12, and the opening of the air inlet fence is inclined downward. In use, external air enters the air inlet 5 through the guidance of the air inlet fence, and then flows into the air flow cavity after being filtered by the filter cotton 2. Then the air in the air flow cavity can be controlled by the air suction valve diaphragm 4 to flow into the half mask.

[0040] With reference to Figure 2 and Figure 4 At the same time, since there is a gap between the filter cotton 2 and the base, when the user breathes, the air can flow in the gap between the filter cotton 2 and the base, so that the filter cotton 2 is fully utilized. On the one hand, the service life of the whole device is improved, and the waste caused by insufficient use and replacement of the filter cotton 2 is reduced. On the other hand, the filtering performance of the filter cotton 2 is ensured. Moreover, after the filter cotton 2 is used for a period of time, the filter cotton 2 can be replaced by opening the cover 12, and the whole use is more convenient.

[0041] With reference to Figure 2 and Figure 4The limiting structure 3 is composed of a first pressing convex ring 31 integrally formed on the cover 12. A supporting convex ring 112 matched with the first pressing convex ring 31 is integrally formed on the seat body 11. An air flow cavity is formed inside the supporting convex ring 112. A first ring groove 111 is formed between the outside of the supporting convex ring 112 and the side wall of the seat body 11, i.e. the first ring groove 111 is arranged around the air flow cavity. The four edges of the filter cotton 2 are all overlapped on the supporting convex ring 112, and the size of the filter cotton 2 is larger than that of the supporting convex ring 112.

[0042] With reference to Figure 2 and Figure 4 When the cover 12 is buckled, the first pressing convex ring 31 on the cover 12 can press the four edges of the filter cotton 2 into the first ring groove 111. Thus, through the cooperation of the supporting convex ring 112 and the first pressing convex ring 31, the filter cotton 2 is suspended in the air flow cavity as a whole, and a certain space is ensured between the filter cotton 2 and the seat body 11. At the same time, the four edges of the filter cotton 2 pressed into the first ring groove 111 can form a filter and seal for the connecting gap between the first pressing convex ring 31 and the supporting convex ring 112, thereby ensuring that the air entering the air flow cavity from the air inlet 5 first passes through the filter cotton 2 for filtration, and further ensuring the use performance of the device as a whole.

[0043] With reference to Figure 2 and Figure 4 A plurality of supporting ribs 6 are also arranged in the air flow cavity. The plurality of supporting ribs 6 are integrally formed on the base, and the plurality of supporting ribs 6 are located below the air suction valve diaphragm 4. An air flow channel is formed between adjacent two supporting ribs 6. When the filter cotton 2 is placed on the supporting convex ring 112, the middle part of the filter cotton 2 can be supported by the plurality of supporting ribs 6, so as to ensure that there is enough space for air flow between the filter cotton 2 and the bottom wall of the air flow cavity, and the air in the air flow cavity is guided to flow through the air flow channel formed between the two supporting ribs 6, which is more conducive to the use effect of the device as a whole.

[0044] The implementation principle of the embodiment of the present application is as follows: before use, the cover 12 is first rotated to be opened, then the filter cotton 2 is placed in the air flow cavity, and the position of the filter cotton 2 is adjusted so that the filter cotton 2 can completely block the air flow cavity, then the cover 12 is rotated to be gradually buckled on the seat body 11, in the process of rotating the cover 12, the four peripheral edges of the filter cotton 2 are extruded by the first compression convex ring 31, so that the four peripheral edges of the filter cotton 2 are pressed into the first ring groove 111, thereby forming fixation of the filter cotton 2, at the same time, the edges of the filter cotton 2 also form a seal of the gap between the first compression convex ring 31 and the sidewall of the first ring groove 111, finally, the cooperation of the first elastic clamping block 131, the second elastic clamping block 132, the clamping groove 121 and the limiting block 122 is used to realize the closure of the cover 12; in use, the filter cotton supporting seat 1 is integrally installed on the half face shield, so that when the user wears the half face shield, the whole air inhalation is controlled by the air inhalation valve diaphragm 4, the air enters the air inlet 5 first filtered by the filter cotton 2, the filtered air enters the air flow cavity, and finally enters the half face shield through the control of the air inhalation valve diaphragm 4; in the use process, the setting of the air flow channel and the air flow cavity ensures the circulation of the air in the filter cotton supporting seat 1, so that the contact area of the air and the filter cotton 2 is increased, thereby improving the utilization rate of the filter cotton 2.

[0045] Embodiment 2

[0046] With reference to Figure 5 and Figure 6 The difference between the present embodiment and embodiment 1 is that the positioning column 7 is integrally formed on the support rib 6, the guide inclined surface is formed on the end of the positioning column 7 away from the support rib 6, and the positioning hole 21 is formed on the filter cotton 2, when the filter cotton 2 is placed on the support rib 6, the positioning column 7 can be arranged through the positioning hole 21, and the positioning hole 21 and the positioning column 7 are gap-fitted; in use, the guide inclined surface facilitates the positioning column 7 to penetrate into the positioning hole 21 on the filter cotton 2, thereby positioning the filter cotton 2 through the cooperation of the positioning column 7 and the positioning hole 21, so that the filter cotton 2 does not tilt when the compression convex strip exerts pressure on the four peripheral edges of the filter cotton 2 in the process of rotating and buckling the cover 12, thereby causing the four peripheral parts of the filter cotton 2 to be unable to be embedded in the embedding groove.

[0047] With reference to Figure 5 and Figure 6In addition, a partition plate 8 is arranged between the cover 12 and the base 11, and a second pressing convex ring 81 is formed on the side of the partition plate 8 facing the cover 12, a second ring groove 82 is formed on the side of the partition plate 8 facing the cover 12, the second pressing convex ring 81 can be embedded in the first ring groove 111, the first pressing convex ring 31 can be embedded in the second ring groove 82, and a plurality of positioning grooves are formed on the partition plate 8, which are arranged one by one with the positioning columns 7, and when the second pressing convex ring 81 is embedded in the second ring groove 82, the end of the positioning column 7 is inserted into the positioning groove.

[0048] With reference to Figure 5 and Figure 6 , when in use, the filter cotton 2 is first placed on the base, and then the edge of the filter cotton 2 is pressed into the first ring groove 111 through the second pressing convex ring 81 on the partition plate 8, so that the filter cotton 2 is fixed through the partition plate 8, and then a second filter cotton 2 can be placed on the partition plate 8 according to the needs, and in this embodiment, a filter plate made of activated carbon or other materials with filtering function can also be placed on the partition plate 8, and finally the cover 12 is turned over and buckled, so that the partition plate 8 is fixed by embedding the first pressing convex ring 31 in the second ring groove 82.

[0049] With reference to Figure 5 and Figure 6 , the space between the base and the cover 12 is divided into two parts by the partition plate 8, and the filter cotton 2 can be placed on both sides of the partition plate 8, so as to enhance the filtering performance of the whole device, and in order to ensure that the two filter cottons 2 can be fully utilized, a plurality of air holes are formed through the partition plate 8, and the air holes communicate the air inlet 5 and the air flow cavity.

[0050] The implementation principle of the embodiment of the application is as follows: before use, the cover 12 is first rotated to be opened, then the two layers of filter cotton 2 and the partition plate 8 are sequentially placed in the air flow cavity, and the position of the filter cotton 2 is adjusted so that the filter cotton 2 can completely block the air flow cavity; in this process, the four peripheral edges of the first layer of filter cotton 2 are extruded by the second compression convex ring 81, so as to press the four peripheral edges of the first layer of filter cotton 2 into the first ring groove 111, so as to form fixation of the first layer of filter cotton 2, then the cover 12 is rotated to be gradually buckled on the seat body 11, in the process of rotating the cover 12, the four peripheral edges of the second layer of filter cotton 2 are extruded by the first compression convex ring 31, so as to press the four peripheral edges of the second layer of filter cotton 2 into the second ring groove 82, so as to form fixation of the second layer of filter cotton 2, at the same time, the edges of the two layers of filter cotton 2 also seal the gap between the first compression convex ring 31, the partition plate 8 and the sidewall of the second ring groove 82, finally, the cooperation of the first elastic clamping block 131, the second elastic clamping block 132, the clamping groove 121 and the limiting block 122 is used to realize the closure of the cover 12; in use, the air is filtered by the two layers of filter cotton 2, the overall filtering quality is improved, at the same time, after the air enters the air inlet 5, the air flows in the air hole and the air flow cavity, so that the contact area of the air and the filter cotton 2 is increased, so that the utilization rate of the two layers of filter cotton 2 is greatly improved.

[0051] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: all equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. An air intake valve seat for a half mask, characterised in that: The utility model provides a filter cotton receiving seat for connecting half mask, which is provided with an air flow cavity for air flow, a filter cotton (2) and a limiting structure (3) for limiting the filter cotton (2) in the filter cotton receiving seat (1), and an air suction valve diaphragm (4) for controlling the overall air suction of the device and an air inlet (5) for sucking air on the filter cotton receiving seat (1), wherein the air inlet (5) is communicated with the air flow cavity.

2. An air intake valve seat for a half mask according to claim 1, characterised in that: The filter cotton receiving seat (1) comprises a seat body (11) and a cover (12) buckled on the seat body (11), one end of the cover (12) is rotatably connected to the seat body (11), the seat body (11) is provided with a clamping structure (13) for clamping and fixing the cover (12), the air suction valve diaphragm (4) and the air flow cavity are arranged on the seat body (11), and the air inlet (5) is arranged on the cover (12).

3. An inlet valve seat for a half mask according to claim 2, characterised in that: The clamping structure (13) comprises a first elastic clamping block (131) and a second elastic clamping block (132) fixed on the seat body (11), the cover (12) is provided with a clamping groove (121) for embedding the first elastic clamping block (131), and a limiting block (122) is fixed on the cover (12) and abuts against the second elastic clamping block (132).

4. An inlet valve seat for a half mask according to claim 2, characterised in that: The limiting structure (3) comprises a first compression convex ring (31) fixed on the cover (12), the seat body (11) is provided with a first ring groove (111), the first ring groove (111) is arranged around the side of the air flow cavity, the filter cotton (2) is overlapped around the first ring groove (111), and the first compression convex ring (31) is arranged to compress the filter cotton (2) around the first ring groove (111).

5. An inlet valve seat for a half mask according to claim 4, characterised in that: The seat body (11) is fixed with a plurality of support ribs (6) for supporting the filter cotton (2), the plurality of support ribs (6) are arranged at intervals in the air flow cavity, and an air flow channel is formed between adjacent two support ribs (6).

6. An inlet valve seat for a half mask according to claim 5, characterised in that: The support rib (6) is further fixed with a positioning column (7), the filter cotton (2) is provided with a positioning hole (21), and the positioning column (7) and the positioning hole (21) are inserted and connected.

7. An inlet valve seat for a half mask according to claim 6, characterised in that: An inclined surface is arranged on the end of the positioning column (7) away from the support rib (6).

8. An inlet valve seat for a half mask according to claim 1, characterized in that: An air inlet fence is arranged at the air inlet (5), and the opening of the air inlet fence is arranged to be inclined downward.

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