CN209403634U - A kind of high efficiency active carbon protective mask of lower resistance - Google Patents
A kind of high efficiency active carbon protective mask of lower resistance Download PDFInfo
- Publication number
- CN209403634U CN209403634U CN201821784928.3U CN201821784928U CN209403634U CN 209403634 U CN209403634 U CN 209403634U CN 201821784928 U CN201821784928 U CN 201821784928U CN 209403634 U CN209403634 U CN 209403634U
- Authority
- CN
- China
- Prior art keywords
- active carbon
- layer
- mask
- high efficiency
- fin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The utility model relates to a kind of high efficiency active carbon protective masks of lower resistance, are related to mask technical field comprising mask body piece, ear band, the mask body piece include surface layer, bottom and the fluffy state active carbon layer being folded between surface layer and bottom.The application can preferably be fixed active carbon layer, and active carbon layer utilization rate is higher in use, meanwhile, the breathing smooth degree of entire mask is more preferably.
Description
Technical field
The utility model relates to mask technical fields, more particularly, to a kind of high efficiency active carbon protective mask of lower resistance.
Background technique
Active carbon mask is common mask category, can absorb and filter peculiar smell, plane face mask in market, folding mouth mask and
Cup type mask has portioned product to use active carbon layer, and activated carbon filter layer is limited to preferably high-density large-particle effect
Mask production technology bulky grain active carbon cloth is frequently used in cup type mask, and industrial application, respiratory resistance is larger, and civilian portion
Point, it is limited to production cost and technique, currently on the market mainly in the filtering layer of the surface adhesion activity powdered carbon using sheet type.
From the point of view of material angle, active powdered carbon bearing capacity on sheet type active carbon layer is less, and extremely concentrates, in order to
Picking and more carrying activated carbon powder are prevented, when production needs that active carbon is fixed using glue.Solid to active carbon
Periodically, it is more to adhere to glue used for active carbon, while also enclosing activated carbon capillary, reduces the actual performance of active carbon, although
It can play the role of peculiar smell adsorption, but absorb and filter effect and bad, meanwhile, active carbon utilization rate is lower, furthermore sheet type
Cause respiratory resistance larger because accumulating active powdered carbon in one layer of very thin fiber cloth, the breathing that will affect entire mask is comfortable
Degree experience.
Utility model content
The purpose of the utility model is to provide a kind of high efficiency active carbon protective masks of lower resistance, can be preferably to activity
Layer of charcoal is fixed, and active carbon layer utilization rate is higher in use, meanwhile, the breathing smooth degree of entire mask is more preferably.
The above-mentioned purpose of utility model of the utility model has the technical scheme that
A kind of high efficiency active carbon protective mask of lower resistance, including mask body piece, ear band, the mask body piece include
Surface layer, bottom and the fluffy state active carbon layer being folded between surface layer and bottom.
By using above-mentioned technical proposal, active carbon is fixed by the fluffy state active carbon layer of setting, so that living
Spatially structure is evenly distributed between surface layer and bottom property layer of charcoal, and active carbon layer utilization rate is higher in use, meanwhile,
The breathing smooth degree of entire mask is more preferably.
The utility model is further arranged to: the fluffy state active carbon layer include fluffy fiber stereochemical structure layer and
The active carbon layer being uniformly laid in the fluffy fiber stereochemical structure layer.
By using above-mentioned technical proposal, fluffy fiber stereochemical structure layer is hot wind fluffy fiber stereochemical structure into the net,
It is uniform-distribution with the macroscopic active carbon small powder active carbon particle in fibre space and forms active carbon layer, structure tool
There is the active carbon that component is often used times over market mask product, due to being distributed with fluffy space structure and a large amount of carbon granules,
The action time and contact area, the active carbon powder of high degree of dispersion for increasing filtering gas can allow suction-operated to have more effect
And utilization rate, while the dimensional fibre structure thickened reduces the resistance of breathing caused by common active carbon cloth in the market instead
Power, the utility model mask can enhance active carbon mask peculiar smell adsorption filter capacity, while significant by fluffy state active carbon layer
Reduce influence of the active carbon layer to mask entirety respiratory resistance.It makes peculiar smell adsorption more efficient, while significantly reducing respiratory resistance,
So that the breathing smooth degree of entire mask is more preferably.
The utility model is further arranged to: being provided with functional layer between the surface layer and bottom.
The utility model is further arranged to: the functional layer include electret melt-blown layer, hot air cotton, antibacterial nonwoven cloth one
Kind or several or above-mentioned several composite layer.
By using above-mentioned technical proposal, mask can be made to adapt to different working environments by the functional layer of setting,
Different functions is made it have, so that the mask has more practicability.
The utility model is further arranged to: the surface layer is made of spun-bonded non-woven fabrics or spunlace non-woven cloth material.
The utility model is further arranged to: the bottom is low reverse osmosis hydrophilic nonwoven layer of cloth, nontoxic antibacterial nonwoven cloth layer
Or both compound nonwoven layer.
The utility model is further arranged to: being provided in the mask body on piece to the structure between surface layer and bottom
The first fixing line being fixed, first fixing line are symmetrical arranged along mask body piece center to the two sides close to ear band,
And it is arranged at intervals with along mask vertical centerline several.
By using above-mentioned technical proposal, by the fixing line of setting to the fluffy state active carbon layer between surface layer and bottom
It is fixed, it is more preferably stable in use.
The utility model is further arranged to: it is provided with the second fixing line at the edge contour of the mask body piece,
Second fixing line is that several " M " shape patterns are arranged.
By using above-mentioned technical proposal, surface layer and bottom edges can be added by the second fixing line of setting
Gu being at the same time, " M " shape by setting, so that mask is whole more preferably beautiful.
The utility model is further arranged to: the protective mask further includes the breathing that the mask body on piece is arranged in
Valve.
By using above-mentioned technical proposal, by the breather valve of setting, it can more preferably be user-friendly for breathing, wear
It is breathed during wearing masks more preferably smooth.
The utility model is further arranged to: the breather valve includes pedestal and the valve deck that is interlocked with pedestal, described
Form cavity between pedestal and valve deck, through-hole offered on the pedestal, the through hole is provided with support rod, in cavity and
It is provided with valve block on support rod, several ventholes are offered on the valve deck, between the venthole and the cavity
It is connected.
By using above-mentioned technical proposal, for wearer when wearing, pedestal one side is close to wearer, and wearer is when exhaling
The positive pressure of gas be discharged can blow valve block open, so that gas be made to be discharged from the venthole of valve deck, in this way can rapidly by
Gas excludes, and avoids generating moisture in mask, and feeling of oppression and heat when reducing using mask improves the wear comfort of wearer.When
In air-breathing, generated negative pressure can automatically close valve block wearer, to avoid the pollutant of inspiration external environment.
The utility model is further arranged to: it is convex that the valve deck far from the one side of the valve block is fixedly connected with first
Rib, first fin are provided with a pair, and two first fins are parallel to each other and are located at the two sides that valve deck is located remotely from each other, the outlet
Hole is provided with several in the two sides of first fin；It one end of first fin and is provided between two first fins
Second fin, second fin is V-shaped, and the venthole is provided with several in the lateral wall of second fin；It is described
Split channel is formed between first fin and second fin.
By using above-mentioned technical proposal, when exhaling, generated gas is discharged wearer from each venthole, due to
The middle position of valve deck also offers venthole, can further shunt to gas, can shorten a part of gas in this way
Travel, enable this portion gas from the venthole in middle position be discharged, stop inside mask to reduce gas
The time is stayed, avoids generating moisture in mask, improves the comfort level of wearer.At the same time, the formation of split channel, can be to row
Gas out is shunted, and is avoided gas from all gushing out and is formed hot-fluid outside mask, and wearer is made to generate feeling of oppression and heat.
In conclusion the utility model has the following beneficial effects:
1, active carbon is fixed by the fluffy state active carbon layer of setting, so that spatially structure is uniform for active carbon layer
It being distributed between surface layer and bottom, active carbon layer utilization rate is higher in use, meanwhile, the breathing smooth degree of entire mask
More preferably；
2, fluffy fiber stereochemical structure layer is hot wind fluffy fiber stereochemical structure into the net, is uniform-distribution in fibre space
The macroscopic active carbon small powder active carbon particle forms active carbon layer, which has times over market mask product
The active carbon of common component, due to increasing the effect of filtering gas with fluffy space structure and the distribution of a large amount of carbon granules
The active carbon powder of time and contact area, high degree of dispersion can allow suction-operated to have more effect and utilization rate, while thickening
Dimensional fibre structure reduces respiratory resistance caused by common active carbon cloth in the market instead, and the utility model mask can lead to
Fluffy state active carbon layer is crossed, enhances active carbon mask peculiar smell adsorption filter capacity, while it is whole to mask to significantly reduce active carbon layer
The influence of body respiratory resistance.It makes peculiar smell adsorption more efficient, while significantly reducing respiratory resistance, the breathing smooth degree of entire mask
More preferably.
3, the fluffy state active carbon layer between surface layer and bottom is fixed by the fixing line of setting, in use process
In it is more preferably stable；
4, wearer is when wearing, and pedestal one side is close to wearer, the positive pressure energy of wearer's gas be discharged when exhaling
It is enough to blow valve block open, so that gas be made to be discharged from the venthole of valve deck, gas can be excluded rapidly in this way, avoided in mask
Moisture is generated, feeling of oppression and heat when reducing using mask improves the wear comfort of wearer.When wearer is in air-breathing, produced
Raw negative pressure can automatically close valve block, to avoid the pollutant of inspiration external environment.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the schematic diagram of a layer structure of prominent mask body piece in the utility model；
Fig. 3 is the cross-sectional view of prominent fluffy state active carbon layer in the utility model；
Fig. 4 is the schematic diagram of prominent functional layer in the utility model；
Fig. 5 is the perspective view of the explosion of prominent breather valve in the utility model；
Fig. 6 is the schematic diagram of prominent valve deck in the utility model；
Fig. 7 is the schematic diagram of prominent valve block in the utility model；
Fig. 8 is the schematic diagram of prominent nose bridge bar in the utility model.
Appended drawing reference: 1, mask body piece；11, surface layer；12, bottom；13, fluffy state active carbon layer；131, fluffy fiber
Stereochemical structure layer；132, active carbon layer；14, functional layer；15, sizing strip；16, nose bridge bar；2, ear band；3, breather valve；31, bottom
Seat；311, through-hole；312, support rod；313, the first clamping raised line；32, valve deck；321, venthole；322, the second clamping raised line；
323, the first fin；324, the second fin；325, limited post；33, cavity；34, interconnecting piece；341, positioning column；35, valve block；
351, location hole；36, split channel.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Referring to Fig.1, be a kind of High dust holding amount low-resistance protective mask disclosed by the utility model, including mask body piece 1, with
And it is connected to the ear band 2 of 1 two sides of mask body piece, when in use, mask body piece 1 is worn by operation ear band 2.
Referring to figs. 2 and 3, mask body piece 1 include surface layer 11, bottom 12 and be folded in surface layer 11 and bottom 12 it
Between fluffy state active carbon layer 13, fluffy state active carbon layer 13 includes fluffy fiber stereochemical structure layer 131 and being uniformly laid on
Active carbon layer 132 in fluffy fiber stereochemical structure layer 131.Wherein, fluffy state active carbon layer 13 is hot wind fluffy fibre into the net
Stereochemical structure is tieed up, fluffy fiber stereochemical structure layer 131 is formed, it is small to be uniform-distribution with macroscopic active carbon in fibre space
The powder active carbon particle forms active carbon layer 132, which has the active carbon that component is often used times over market mask product,
Due to making peculiar smell adsorption more efficient with fluffy space structure and the distribution of a large amount of carbon granules, while significantly reducing breathing resistance
Power, to influence the breathing comfort level experience of entire mask.
Fluffy state active carbon layer 13 is a kind of fiber of the active carbon powder distribution of solid into web frame, is had certain thick
Degree, the action time and contact area, the active carbon powder of high degree of dispersion for increasing filtering gas can allow suction-operated to have more
Effect and utilization rate, while the dimensional fibre structure thickened reduces breathing caused by common active carbon cloth in the market instead
Resistance, the utility model mask can enhance active carbon mask peculiar smell adsorption filter capacity, simultaneously by fluffy state active carbon layer 13
Significantly reduce influence of the active carbon layer 132 to mask entirety respiratory resistance.
With reference to Fig. 4, wherein surface layer 11 is made of spun-bonded non-woven fabrics or spunlace non-woven cloth material, and bottom 12 is low reverse osmosis
Hydrophilic nonwoven layer of cloth, nontoxic antibacterial nonwoven cloth layer or both compound nonwoven layer.Difference can be made according to different needs
Surface layer 11 and bottom 12.
Functional layer 14 is provided between surface layer 11 and bottom 12, wherein functional layer 14 includes hot air cotton layer, antibacterial nonwoven
The one or more of layer of cloth can eliminate the unusual smell, dehumidify, antibacterial by the layer, it is thus possible to assign mask different usability
Can, thus, so that the mask have it is multi-functional, be adapted to different workplaces.
The first fixing line that the structure between surface layer 11 and bottom 12 is fixed is provided on mask body piece 1
17, the first fixing line 17 is symmetrical arranged along 1 center of mask body piece to the two sides close to ear band 2, and along mask vertical centerline
It is arranged at intervals with several.The second fixing line 18 is provided on the edge contour of mask body piece 1, wherein the second fixing line 18
It arranges and to be formed for the pattern of several " M " shapes, it can be to surface layer 11 by the first fixing line 17 and the second fixing line 18 of setting
Fluffy state active carbon layer 13 between bottom 12 is fixed, thus, active carbon layer 13 is not easily moveable in use.
With reference to Fig. 4 and Fig. 5, which further includes the breather valve 3 being arranged on mask body piece 1.
With reference to Fig. 5 and Fig. 6, breather valve 3 is including pedestal 31 and the valve deck 32 being combined, pedestal 31 are engaged with pedestal 31
Cavity 33 is formed between valve deck 32.Through-hole 311 is offered on pedestal 31, cavity 33 is communicated with the outside by through-hole 311,
Several support rods 312 are fixedly connected at through-hole 311, several support rods 312 circumference array at through-hole 311 is distributed,
Several support rods 312 are fixed together to form interconnecting piece 34 far from one end of 31 inner wall of pedestal.In cavity 33 and position
In being provided with valve block 35 on support rod 312, offer several ventholes 321 on valve deck 32, venthole 321 and cavity 33 with
And outside air is connected.
Wearer is when wearing, face of 31 one side of pedestal close to wearer, wearer's gas be discharged when exhaling
Positive pressure can blow valve block 35 open, so that gas be made to be discharged from the venthole 321 of valve deck 32, can rapidly arrange gas in this way
It removes, avoids generating moisture in mask body piece 1, feeling of oppression and heat when reducing using mask improves wear comfort.When wearer exists
When air-breathing, generated negative pressure can automatically be closed valve block 35, to avoid the pollutant of inspiration external environment, the mask wearing side
Just, and cost is relatively low, can effectively reduce polluted gas injury caused by the body of people.
Spaced horizontal is fixedly connected with the first clamping raised line 313 on the outer wall of pedestal 31, on the inner wall of valve deck 32 with
First clamping 313 one-to-one correspondence level of raised line is installed with the second clamping raised line 322.
When valve deck 32 to be fastened on pedestal 31, make the second clamping raised line 322 from wherein the one of the first clamping raised line 313
Side snaps fit onto other side, in such manner, it is possible to which pedestal 31 and valve deck 32 are snapped together, valve deck 32 is not fallen off.
The first fin 323 is fixedly connected on one side of the valve deck 32 far from pedestal 31, the first fin 323 is provided with two
Item, two the first fins 323 are located at the two sides that valve deck 32 is located remotely from each other and are parallel to each other, and it is convex that venthole 321 is then provided with first
The two sides of rib 323.
It is fixedly connected with the second fin 324 in one end of the first fin 323, the second fin 324 is V-shaped, and is located at two
Between first fin 323, the first fin 323 and the second fin 324 form " M " shape, and venthole 321 is also provided with the second fin
On 324 lateral wall, and split channel 36 is formed between the first fin 323 and the second fin 324.
Wearer exhale when, generated gas is discharged from each venthole 321, due to valve deck 32 two sides and in
Between position offer venthole 321, therefore, gas can be shunted, the movement of a part of gas can be shortened in this way
Distance enables this portion gas to be discharged from the venthole 321 in middle position, thus when reducing stop of the gas inside mask
Between, it avoids generating moisture in mask, improves the comfort level of wearer.And the formation of split channel 36, it can be to the gas of discharge
It is further shunted, avoids gas from all gushing out and form hot-fluid outside mask, wearer is made to generate feeling of oppression and heat.
It is more stable on support rod 312 in order to be placed on valve block 35 in conjunction with Fig. 7, it is formed in several support rods 312
Interconnecting piece 34 on be fixedly connected with positioning column 341, positioning column 341 is protruded towards the direction close to valve deck 32, is leaned in valve block 35
Location hole 351 compatible with positioning column 341 is offered on the one side of nearly pedestal 31, positioning column 341 is inserted into positioning
In hole 351.In this way, positioning column 341 can be inserted in location hole 351 when being installed to valve block 35, so as to
The stability for improving valve block 35, avoids valve block 35 from shaking in pedestal 31.
In conjunction with Fig. 6, in order to further improve the mounting stability of valve block 35, in valve deck 32 close to the one side of pedestal 31
On be fixedly connected with limited post 325, limited post 325 protrudes setting towards the direction close to pedestal 31, the position of limited post 325 with
The position of positioning column 341 is corresponding.
In this way, when fastening valve deck 32, the limited post 325 on valve deck 32 is proper after valve block 35 is mounted on pedestal 31
It can be connected on valve block 35 well, valve block 35 can effectively be limited in this way, valve block 35 is avoided to occur in pedestal 31
Skew.
In order to enable mask to be more bonded the bridge of the nose of wearer, mask body piece outside and be located at upper end among
Position level is fixedly connected with sizing strip 15.In this way, people, when wearing to mask, wearer passes through bending sizing strip
15, the bending degree of mask can be adjusted, so that the bending radian of mask be made to be bonded the bridge of the nose of wearer just, make mouth
Cover is more bonded the face of wearer, keeps the protective action of mask more preferable.
In conjunction with shown in Fig. 4 and Fig. 8, in order to further increase the protective action of mask, mask body piece inside and with
The corresponding position level of sizing strip 15 is fixedly connected with nose bridge bar 16, and nose bridge bar 16 is equally able to carry out bending, in this way, passing through
Nose bridge bar 16 is bent, mask can be made more to be bonded the bridge of the nose of wearer, enhances the protection effect of mask, improves comfortable wearing
Degree.
It should be understood that scheme involved in the application can apply in ear-wearing type mask or wear-type mouth or
In other mask products of person.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (10)
1. a kind of high efficiency active carbon protective mask of lower resistance, including mask body piece (1), ear band (2), it is characterised in that: institute
Stating mask body piece (1) includes surface layer (11), bottom (12) and the fluffy state being folded between surface layer (11) and bottom (12)
Active carbon layer (13).
2. the high efficiency active carbon protective mask of lower resistance according to claim 1, it is characterised in that: the fluffy state activity
Layer of charcoal (13) includes fluffy fiber stereochemical structure layer (131) and is uniformly laid on the fluffy fiber stereochemical structure layer (131)
Interior active carbon layer (132).
3. the high efficiency active carbon protective mask of lower resistance according to claim 1, it is characterised in that: in the surface layer (11)
Functional layer (14) are provided between bottom (12).
4. the high efficiency active carbon protective mask of lower resistance according to claim 3, it is characterised in that: the functional layer (14)
Including hot air cotton, the one or more of antibacterial nonwoven cloth or above-mentioned several composite layer.
5. the high efficiency active carbon protective mask of lower resistance according to claim 1, it is characterised in that: the surface layer (11) is
Spun-bonded non-woven fabrics or spunlace non-woven cloth material are made.
6. the high efficiency active carbon protective mask of lower resistance according to claim 1, it is characterised in that: the bottom (12) is
Low reverse osmosis hydrophilic nonwoven layer of cloth, nontoxic antibacterial nonwoven cloth layer or both compound nonwoven layer.
7. the high efficiency active carbon protective mask of lower resistance according to claim 1-6, it is characterised in that: described
The first fixing line (17) that the structure between surface layer (11) and bottom (12) is fixed is provided on mask body piece (1),
First fixing line (17) is symmetrical arranged along mask body piece (1) center to the two sides close to ear band (2), and vertical along mask
Center line is arranged at intervals with several.
8. the high efficiency active carbon protective mask of lower resistance according to claim 1, it is characterised in that: in the mask body
It is provided at the edge contour of piece (1) the second fixing line (18), second fixing line (18) is the arrangement of several " M " shape patterns
It forms.
9. the high efficiency active carbon protective mask of lower resistance according to claim 1, it is characterised in that: the protective mask also wraps
Include the breather valve (3) being arranged on the mask body piece (1)；The breather valve (3) includes pedestal (31) and and pedestal
(31) valve deck (32) being interlocked forms cavity (33) between the pedestal (31) and valve deck (32), opens on the pedestal (31)
Equipped with through-hole (311), support rod (312) are provided at the through-hole (311), in cavity (33) and are located at support rod (312)
On be provided with valve block (35), offer several ventholes (321) on the valve deck (32), the venthole (321) with it is described
Cavity is connected between (33).
10. the high efficiency active carbon protective mask of lower resistance according to claim 9, it is characterised in that: the valve deck (32)
One side far from the valve block (35) is fixedly connected with the first fin (323), and first fin (323) is provided with a pair,
Two first fins (323) are parallel to each other and are located at the two sides that valve deck (32) are located remotely from each other, and the venthole (321) is described first
The two sides of fin (323) are provided with several；It one end of first fin (323) and is set between two first fins (323)
It is equipped with the second fin (324), second fin (324) is V-shaped, and the venthole (321) is in second fin (324)
Lateral wall be provided with it is several；Split channel (36) are formed between first fin (323) and second fin (324).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821784928.3U CN209403634U (en) | 2018-10-31 | 2018-10-31 | A kind of high efficiency active carbon protective mask of lower resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821784928.3U CN209403634U (en) | 2018-10-31 | 2018-10-31 | A kind of high efficiency active carbon protective mask of lower resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209403634U true CN209403634U (en) | 2019-09-20 |
Family
ID=67932891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821784928.3U Active CN209403634U (en) | 2018-10-31 | 2018-10-31 | A kind of high efficiency active carbon protective mask of lower resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209403634U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021213469A1 (en) * | 2020-04-23 | 2021-10-28 | 广东金发科技有限公司 | Foldable breathing mask |
-
2018
- 2018-10-31 CN CN201821784928.3U patent/CN209403634U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021213469A1 (en) * | 2020-04-23 | 2021-10-28 | 广东金发科技有限公司 | Foldable breathing mask |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203873053U (en) | Mask with e-PTFE microporous membranes | |
| CN109349704A (en) | A kind of protective mask | |
| CN105246553B (en) | Mask | |
| CN209449707U (en) | A kind of compound low-resistance protective mask of active carbon | |
| CN205923004U (en) | Portable air purification gauze mask | |
| CN201036668Y (en) | Portable personal purifier | |
| CN204259883U (en) | Spatial folding mouth mask | |
| CN205884733U (en) | High efficiency filter hangs down antifog haze gauze mask of respiratory resistance | |
| CN209403634U (en) | A kind of high efficiency active carbon protective mask of lower resistance | |
| CN209346142U (en) | A kind of High dust holding amount low-resistance protective mask | |
| CN205597195U (en) | Cup -shaped gauze mask | |
| CN104305593B (en) | A kind of anti-haze mouth mask | |
| CN206577262U (en) | A kind of cold-proof haze mouth mask | |
| CN209331226U (en) | A kind of Antimicrobial protective mask of high efficiency filter | |
| CN207136304U (en) | The anti-dust respirator of good purification | |
| CN203676202U (en) | Special protective mask for haze air | |
| CN205671530U (en) | One facilitates mask | |
| CN204861315U (en) | Dust mask is folded in environmental protection | |
| CN112335961A (en) | Three-dimensional protective mask | |
| CN111109712A (en) | Integrated cloth-fell cover | |
| CN205492685U (en) | Breathing mask | |
| CN204543319U (en) | Anti-haze nose cup | |
| CN216776194U (en) | Mask with deodorizing bag | |
| CN214677690U (en) | Plane gauze mask that contains support bar | |
| CN213720099U (en) | High-reliability mask |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |