CN111111035A - Simple safety protection headgear - Google Patents
Simple safety protection headgear Download PDFInfo
- Publication number
- CN111111035A CN111111035A CN202010094739.9A CN202010094739A CN111111035A CN 111111035 A CN111111035 A CN 111111035A CN 202010094739 A CN202010094739 A CN 202010094739A CN 111111035 A CN111111035 A CN 111111035A
- Authority
- CN
- China
- Prior art keywords
- headgear
- safety protection
- ventilation channel
- head cover
- simple safety
- 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.)
- Pending
Links
- 238000009423 ventilation Methods 0.000 claims abstract description 51
- 230000000149 penetrating effect Effects 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000003584 silencer Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 13
- 238000001914 filtration Methods 0.000 description 6
- 239000000443 aerosol Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 208000028867 ischemia Diseases 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 230000002633 protecting effect Effects 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000965 Duroplast Polymers 0.000 description 1
- 239000004638 Duroplast Substances 0.000 description 1
- 206010035664 Pneumonia Diseases 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000000302 ischemic effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/02—Masks
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/10—Respiratory apparatus with filter elements
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention relates to the technical field of medical protection, and discloses a simple safety protection headgear, which comprises a headgear body, wherein a ventilation channel is arranged at the rear side of the headgear body, the headgear body and the ventilation channel are made of transparent films and are integrally formed, the upper end of the ventilation channel is communicated with an inner cavity of the headgear body, the lower end of the ventilation channel is connected with an air source through a corrugated pipe, a plurality of rope penetrating holes are formed in the opening at the lower end of the headgear body, and rope fastening is connected in the rope penetrating holes in a penetrating manner.
Description
Technical Field
The invention relates to the technical field of medical protection, in particular to a simple safety protection headgear.
Background
The New Coronary Pneumonia (NCP) transmission ways mainly include direct transmission, aerosol transmission and contact transmission, wherein the aerosol transmission (aerosol transmission means that spray is mixed in air to form aerosol which causes infection after being inhaled) which is the most difficult to protect is usually protected by a mask, but the protection area of a common mask is small, the effect of comprehensively protecting the head and the face cannot be achieved, and gaps often exist between the common mask and the mouth and the nose of a human body, so that the protection effect of the common mask is poor and the use requirement cannot be met; the professional protective headgear (mask) has the disadvantages of complex operation, high manufacturing cost and high maintenance cost, and cannot be widely used as daily protective articles;
in addition, most of the existing protective headgear (head cap) is connected with an oxygen or clean air source, so that once an external air supply device fails and cannot supply air, a user can suffocate, and danger is caused to the user.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a simple safety protection headgear which can effectively protect the head and face of a user and can not suffocate the user when an external air supply device fails and can not supply air.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a simple and easy safety protection headgear, includes the headgear body, the rear side of headgear body is provided with ventilative passageway, ventilative passageway's upper end and the inner chamber intercommunication of headgear body, the lower extreme passes through the bellows and is connected with the air supply, the lower extreme opening part of headgear body is equipped with a plurality of stringing holes, the downthehole interlude of stringing has connect the tether.
Preferably, one end of the corrugated pipe, which is far away from the ventilation channel, is connected with a low-pressure air source through a standard hard plastic joint,
preferably, one end of the corrugated pipe, which is far away from the ventilation channel, is connected with a gas source with pressure higher than medium pressure through a conical joint.
Preferably, the left and right sides of the rear part of the head sleeve body are respectively provided with an exhaust valve, and the exhaust valves are connected in series through double one-way valves.
Preferably, the headgear body is in the shape of a transparent bag, the headgear body and the ventilation channel are made of a transparent film, and the headgear body and the ventilation channel are integrally formed.
Preferably, the head cover body and the ventilation channel are formed by a left transparent film and a right transparent film through one-time heat sealing pressing.
As another preferable scheme, the inner wall of the opening at the lower end of the head sleeve body is provided with a non-breathable sponge ring, and the tether passes through the space between the non-breathable sponge ring and the inner wall at the lower end of the head sleeve body.
As another preferred scheme, the hole has been seted up to the positive lower part of headgear body, fixedly connected with filters the gasket in the hole, it is equipped with the seal membrane that can tear to filter the gasket outside.
As another preferable scheme, a sealing clip 11 is sleeved outside the lower end of the air-permeable channel.
(III) advantageous effects
Compared with the prior art, the invention provides a simple safety protection headgear, which has the following beneficial effects:
1. this simple and easy safety protection headgear can effectively protect user's head and face, owing to adopt the transparent film preparation, has a great field of vision after the user dresses to simple structure, easy production.
2. This simple and easy safety protection headgear's lower extreme is equipped with non-ventilative sponge circle, can the annular seal neck, prevents that outside gas from getting into inside the headgear from the under shed position of headgear, has improved the protecting effect, and the pressure of tether (area) when can also cushion the neck and seal prevents that the head from lacking blood.
3. The simple and easy safety protection headgear openly lower part is equipped with the sealed filter pad of film, can tear the seal membrane and use filter pad filtered air when external air feeder breaks down and can't supply air, makes the user can continue to breathe clean air, can not cause the user to suffocate.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a connection with a medium or higher pressure gas source according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a third embodiment of the present invention.
In the figure: 1. a sleeve body; 2. a ventilation channel; 3. a bellows; 4. a stringing hole 4; 5. a tether; 6. a non-breathable sponge ring; 7. an exhaust valve; 8. a filter pad; 9. a standard hard plastic joint; 10. a tapered joint; 11. a closure clip 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a first embodiment, please refer to fig. 1-2, a simple safety protection headgear comprises a headgear body 1, a ventilation channel 2 is arranged at the rear side of the headgear body 1, the upper end of the ventilation channel 2 is communicated with the inner cavity of the headgear body 1, the lower end of the ventilation channel 2 is connected with an air source through a corrugated tube 3, the headgear body 1 is in a transparent bag shape, the headgear body 1 and the ventilation channel 2 are made of transparent films, the transparent films can be polyethylene films or polypropylene films, the headgear body 1 and the ventilation channel 2 are integrally formed, the headgear body 1 and the ventilation channel 2 are formed by pressing a left transparent film and a right transparent film in a one-step heat sealing manner, the raw materials of the headgear body 1 and the ventilation channel 2 are easy to obtain, and the; the lower end opening of the head sleeve body 1 is positioned at the neck of a user and is provided with a plurality of rope penetrating holes 4, a rope tying 5 is connected in the rope penetrating holes 4 in a penetrating manner, the head sleeve body 1 can be fixed on the head of the user by tying the rope tying 5, the rope tying 5 is preferably a paper rope, the maximum bearing capacity of the rope tying 5 is 120 and 200N, the rope tying 5 is convenient for the user to tear off in an emergency, the head sleeve body 1 can be rapidly taken down, the rope tying 5 can be replaced by a hasp or a thread gluing, the head sleeve body 1 is a positive-pressure protection head sleeve, gas is input to the top end of the head of the user in the inner cavity of the head sleeve body 1; the lower end of the ventilation channel 2 is connected with one end of the corrugated pipe 3 far away from the air source in a bonding or heat sealing fixed connection mode, and when the ventilation channel is connected with a low-pressure air source, one end of the corrugated pipe 3 far away from the ventilation channel 2 is connected with the air source through a standard hard plastic joint 9; when being connected with the pressure air supply more than moderate, bellows 3 is kept away from 2 one end of ventilative passageway and is passed through taper joint 10 and be connected with the air supply, and taper joint 10 can reduce atmospheric pressure, guarantees that the user normally breathes, and taper joint 10 passes through draw-in groove or thread groove swing joint in standard duroplast connects 9, and bellows 3 in this embodiment is the scalable hose of ripple, is connected with the fixation clamp on bellows 3, is convenient for fix bellows 3 on user's clothes.
Preferably, the conical joint 10 is connected to a pressure reducer and a silencer, the pressure reducer being arranged to regulate the gas flow to the most comfortable pressure for the user, and the silencer being arranged to avoid the noise of the pressurized gas.
When in use, the corrugated pipe 3 communicated with the ventilation channel 2 of the head cover body 1 is connected with an air source, the head cover body 1 is sleeved on the head of a user by the user, the ventilation channel 2 is positioned at the rear side of the head of the user, the tether 5 is positioned at the neck of the user, the head cover body 1 can be fixed by tying the tether 5, the tether 5 lightly presses the head of the user without causing difficulty in breathing of the user, the corrugated pipe 3 is fixed on clothes of the user by a fixing clamp on the corrugated pipe 3, the head cover body 1 is connected with the pressure air source through the ventilation channel 2 and the corrugated pipe 3, the head cover is protected by positive pressure, the air is input to the top end of the head of the user in the inner cavity of the head cover body 1 through the ventilation channel 2, the air flows from top to bottom, the exhaust gas exhaled by the user is discharged from a gap, the polluted air can not flow back, the headgear of the embodiment can effectively protect the head and the face of a user, the headgear is made of the transparent film, the user has a larger visual field after wearing the headgear, the headgear is simple in structure and easy to produce, the maximum bearing capacity of the tether 5 is 120 plus 200N, and the user can pull the tether 5 hard in an emergency so as to take off the headgear rapidly.
Second embodiment, please refer to fig. 3, a simple safety protection headgear comprises a headgear body 1, wherein a non-breathable sponge ring 6 is arranged on an inner wall of an opening at the lower end of the headgear body 1, the non-breathable sponge ring 6 is made of foamed sponge such as polyurethane foamed sponge or rubber cotton, and has the characteristics of air impermeability, excellent elasticity and good rebound resilience, a tether 5 penetrates through the space between the non-breathable sponge ring 6 and the inner wall at the lower end of the headgear body 1, the non-breathable sponge ring 6 is arranged to seal a neck in an annular manner, and the pressure of the tether 5 is buffered when the neck is sealed, so as to prevent head ischemia; the left and right parts of the rear part of the head cover body 1 are respectively provided with an exhaust valve 7, the exhaust valves 7 are connected in series by double one-way valves, the exhaust valves 7 can exhaust waste gas exhaled by a user and prevent polluted gas from flowing back, and other structures are the same as those of the first embodiment.
When in use, the corrugated pipe 3 communicated with the ventilation channel 2 of the head cover body 1 is connected with the air source, the user sleeves the head cover body 1 on the head of the user, the ventilation channel 2 is positioned at the rear side of the head of the user, the non-ventilation sponge ring 6 is sleeved on the neck of the user, the tether 5 is positioned between the non-ventilation sponge ring 6 and the inner wall of the lower end of the head cover body 1, the tether 5 can fix the head cover body 1, the non-ventilation sponge ring 6 annularly seals the neck of the user to avoid external dirty air from entering from a gap between the lower end opening of the head cover body 1 and the neck of the user, and buffers the pressure of the tether 5 to prevent the head of the user from being ischemic, the head cover body 1 is connected with the pressure air source through the ventilation channel 2 and the corrugated pipe 3, and is used as a positive pressure protection head cover, the exhaust gas exhaled by the user is exhausted from the exhaust valve 7, and the exhaust valve 7 is a one-way valve, so that the backflow of the polluted gas can be prevented.
In a third embodiment, please refer to fig. 4, a simple safety protection headgear comprises a headgear body 1, a hole is formed in the lower portion of the front face of the headgear body 1, a filtering pad 8 is fixedly connected in the hole, the filtering pad 8 is an emergency filtering pad made of a particulate material of KN95, a sealing film capable of being torn is arranged on the outer side of the filtering pad 8, and the sealing film can be torn off by arranging the filtering pad 8 in an emergency situation, such as when an external air supply device fails and cannot supply air, so that a user can ventilate emergently, so that the user can continuously breathe clean air, and suffocation or dirty air of the user cannot be caused; the lower extreme external connection of ventilation passageway 2 seals and presss from both sides 11, seals to press from both sides 11 through the lower extreme outer wall connection of connecting rope/area with ventilation passageway 2, seals to press from both sides 11 and can prevent that ventilation passageway 2 is sealed that dirty air from flowing back to headgear body 1 through ventilation passageway 2 in, other structures are the same with the embodiment two.
When in use, the corrugated pipe 3 communicated with the ventilation channel 2 of the head sleeve body 1 is connected with an air source, the user sleeves the head sleeve body 1 on the head of the user, the ventilation channel 2 is positioned at the rear side of the head of the user, the filter gasket 8 is positioned at the position corresponding to the mouth and nose parts of the user on the front side of the head sleeve body 1, the non-ventilation sponge ring 6 is sleeved on the neck of the user, the tether 5 is positioned between the non-ventilation sponge ring 6 and the inner wall of the lower end of the head sleeve body 1, the head sleeve body 1 can be fixed by fastening the tether 5, the non-ventilation sponge ring 6 seals the neck of the user in an annular mode to prevent external dirty air from entering from a gap between the lower end opening of the head sleeve body 1 and the neck of the user, the pressure of the tether 5 is buffered, the head sleeve body 1 is prevented from head ischemia, the head sleeve body 1 is connected, the gas flows from top to bottom, the exhaust gas exhaled by the user is exhausted from the exhaust valve 7, and the exhaust valve 7 is a one-way valve and can prevent the backflow of the polluted gas; when an emergency occurs, if the external air supply device fails and can not supply air, the sealing membrane is torn off, and the filtering gasket 8 is used for emergency ventilation of a user, so that the user can continuously breathe clean air, and the user cannot suffocate or breathe dirty air; the lower extreme external connection of ventilation channel 2 has the clamp 11 of sealing, can prevent that the ventilation channel is sealed that dirty air from flowing back to in the headgear body 1 through ventilation channel.
It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a simple and easy safety protection headgear, includes headgear body (1), its characterized in that: the rear side of the head cover body (1) is provided with a ventilation channel (2), the upper end of the ventilation channel (2) is communicated with the inner cavity of the head cover body (1), the lower end of the ventilation channel is connected with an air source through a corrugated pipe (3), a plurality of rope penetrating holes (4) are formed in the opening of the lower end of the head cover body (1), and rope ropes (5) are connected in the rope penetrating holes (4) in a penetrating mode.
2. The simple safety protection headgear of claim 1, wherein: one end, far away from the ventilation channel (2), of the corrugated pipe (3) is connected with a low-pressure air source through a standard hard plastic joint (9), and a fixing clamp is connected to the corrugated pipe (3).
3. The simple safety protection headgear of claim 1, wherein: one end, far away from the ventilation channel (2), of the corrugated pipe (3) is connected with a pressure air source above a medium pressure through a conical joint (10), and the conical joint (10) is movably connected into a standard hard plastic joint (9) through a clamping groove or a thread groove.
4. The simple safety protection headgear of claim 3, wherein: the conical joint (10) is connected with a pressure reducer and a silencer.
5. The simple safety protection headgear of claim 1, wherein: the inner wall of the opening at the lower end of the head cover body (1) is provided with a non-breathable sponge ring (6), the tether (5) penetrates through the non-breathable sponge ring (6) and the inner wall at the lower end of the head cover body (1), and the maximum bearing capacity of the tether (5) is 120 plus 200N.
6. The simple safety protection headgear of claim 1, wherein: the left and right sides of the rear part of the head cover body (1) are respectively provided with an exhaust valve (7), and the exhaust valves (7) are connected in series through double one-way valves.
7. The simple safety protection headgear of claim 1, wherein: the headgear body (1) is in a transparent bag shape, the headgear body (1) and the ventilation channel (2) are made of transparent films, and the headgear body (1) and the ventilation channel (2) are integrally formed.
8. The simple safety protection headgear of claim 1, wherein: the head cover body (1) and the ventilation channel (2) are formed by pressing a left transparent film and a right transparent film in a one-time heat sealing mode.
9. The simple safety protection headgear of claim 1, wherein: the hole has been seted up to the positive lower part of headgear body (1), fixedly connected with filters gasket (8) in the hole, it is equipped with the seal membrane that can tear to filter gasket (8) outside.
10. The simple safety protection headgear of claim 1, wherein: and a sealing clamp (11) is sleeved outside the lower end of the air-permeable channel (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010094739.9A CN111111035A (en) | 2020-02-16 | 2020-02-16 | Simple safety protection headgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010094739.9A CN111111035A (en) | 2020-02-16 | 2020-02-16 | Simple safety protection headgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111111035A true CN111111035A (en) | 2020-05-08 |
Family
ID=70492832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010094739.9A Pending CN111111035A (en) | 2020-02-16 | 2020-02-16 | Simple safety protection headgear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111111035A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3927668A (en) * | 1972-03-23 | 1975-12-23 | Bullard Co | Dual purpose air inlet method for head enclosure |
| CN2650791Y (en) * | 2003-09-19 | 2004-10-27 | 宋争放 | Sealed protective head mask |
| CN2730412Y (en) * | 2004-10-26 | 2005-10-05 | 周光宇 | Protective, positive pressure sealing mask series |
| CN201101147Y (en) * | 2007-07-19 | 2008-08-20 | 范碧福 | Face mask capable of breathing fresh air |
| CN104415478A (en) * | 2013-08-21 | 2015-03-18 | 李庆祯 | Air supply type fire escape mask |
| CN205924743U (en) * | 2016-06-24 | 2017-02-08 | 上海依格安全装备有限公司 | Urgent air feeder |
| CN206342818U (en) * | 2016-11-10 | 2017-07-21 | 江苏海拓科技有限公司 | A kind of fire-fighting positive-pressure air respirator |
| CN207152906U (en) * | 2017-09-16 | 2018-03-30 | 合肥林夕机械有限公司 | A kind of positive-pressure type gas defence membrane filter mask |
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| CN212466860U (en) * | 2020-02-16 | 2021-02-05 | 崔宇龙 | Simple safety protection headgear |
-
2020
- 2020-02-16 CN CN202010094739.9A patent/CN111111035A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3927668A (en) * | 1972-03-23 | 1975-12-23 | Bullard Co | Dual purpose air inlet method for head enclosure |
| CN2650791Y (en) * | 2003-09-19 | 2004-10-27 | 宋争放 | Sealed protective head mask |
| CN2730412Y (en) * | 2004-10-26 | 2005-10-05 | 周光宇 | Protective, positive pressure sealing mask series |
| CN201101147Y (en) * | 2007-07-19 | 2008-08-20 | 范碧福 | Face mask capable of breathing fresh air |
| CN104415478A (en) * | 2013-08-21 | 2015-03-18 | 李庆祯 | Air supply type fire escape mask |
| CN205924743U (en) * | 2016-06-24 | 2017-02-08 | 上海依格安全装备有限公司 | Urgent air feeder |
| CN206342818U (en) * | 2016-11-10 | 2017-07-21 | 江苏海拓科技有限公司 | A kind of fire-fighting positive-pressure air respirator |
| CN207152906U (en) * | 2017-09-16 | 2018-03-30 | 合肥林夕机械有限公司 | A kind of positive-pressure type gas defence membrane filter mask |
| CN109011247A (en) * | 2018-07-23 | 2018-12-18 | 杭州市水务控股集团有限公司 | A kind of anti-suffocation crash helmet |
| CN212466860U (en) * | 2020-02-16 | 2021-02-05 | 崔宇龙 | Simple safety protection headgear |
Non-Patent Citations (1)
| Title |
|---|
| 张武等: ""中国煤炭工业百科全书"", 煤炭工业出版社, pages: 149 - 150 * |
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