CN111420317A - Protective hood and using method thereof - Google Patents
Protective hood and using method thereof Download PDFInfo
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- CN111420317A CN111420317A CN202010389433.6A CN202010389433A CN111420317A CN 111420317 A CN111420317 A CN 111420317A CN 202010389433 A CN202010389433 A CN 202010389433A CN 111420317 A CN111420317 A CN 111420317A
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- cover body
- head cover
- opening
- protective hood
- layer
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- 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
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- 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
- 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
- A62B18/084—Means for fastening gas-masks to heads or helmets
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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- 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)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
Abstract
The invention belongs to the technical field of medical supplies, and particularly relates to a protective hood and a using method thereof. The oily film layer of the protective hood has hydrophobicity, and reduces liquid and the like from attaching to the outer side of the protective hood. The protective hood can be quickly worn and taken off through the opening which can be opened and closed and the connecting structure which is positioned behind the protective hood, and the connecting structure and other parts are prevented from being polluted by splashing of liquid such as liquid medicine, blood of a patient, body fluid and the like in the medical process. The invention can circulate and purify the air in the protective hood through the ventilation hole of the pipeline layer and the through hole of the skin-friendly layer by the circulating ventilation device, thereby reducing the discomfort of a user. And at the same time, sweat and the like absorbed by the skin-friendly layer are properly discharged.
Description
Technical Field
The invention belongs to the technical field of medical supplies, and particularly relates to a protective hood and a using method thereof.
Background
When medical personnel are in medical operation, in order to play the roles of isolation and protection, the mouth and the nose are generally protected by using the mask or wearing a sanitary cap on the head, and the mask and the sanitary cap are matched to achieve the effects of safety and sanitation to a certain extent. However, except for the mouth and the nose, other parts of the face, including the neck, are still exposed outside, so that the face is easy to infect, and particularly, medical staff are in great danger when the face is subjected to diseases with relatively strong infectivity, such as pneumonia infected by novel coronavirus or strong infectious diseases of atypical pneumonia, and the like. In the prior art, a protective cover or protective clothing with a shawl structure is mostly adopted, and medical care personnel are exposed at the outside part, so that the risk of infection of the medical care personnel is reduced.
For example, chinese patent No. 201520051699.4 discloses a medical disposable protective head cover, which integrates a protective mask, an eyeshade and a protective cap, effectively prevents harmful viruses and bacteria in the air from being inhaled, and effectively protects medical staff and users from viruses and bacteria in infectious contamination places, thereby providing better and safer protection.
However, the protective hood is only provided with a breathing filter device positioned on the face, and other parts are closed. When the protective hood is internally and externally airtight, a user can easily sweat and exhaust heat when the protective hood is used for a long time, the physical strength of the user is accelerated to be reduced, the medical care work is influenced, and even syncope and the like due to dehydration exist.
And after long-term use, pressure sores are easily generated at the contact positions of the face of a user and the opening edge of the protective hood.
Disclosure of Invention
The invention aims to provide a protective hood and a using method thereof, aiming at the defects of the prior art.
The technical solution of the invention is as follows: a protective hood comprises a hood body, a shoulder part connected below the hood body, a face opening positioned in front of the hood body, and an opening which can be opened and closed and is positioned behind the hood body.
The inner sides of the periphery of the face opening are provided with pressure sore prevention filler strips; the pressure sore prevention filler strip is sequentially provided with a sponge layer and a gel layer towards the head cover body. The pressure sore prevention filler strip can prevent pressure sores from being generated at the corresponding parts of the face openings after the user uses the head cover body for a long time.
The opening capable of being opened and closed extends downwards to the lower end of the shoulder part; connecting structures are arranged on two sides of the opening capable of being opened and closed; the head cover body and the shawl part are integrally manufactured.
The protective hood can be quickly worn and taken off through the opening which can be opened and closed and the connecting structure which is positioned behind the protective hood, and the connecting structure and other parts are prevented from being polluted by splashing of liquid such as liquid medicine, blood of a patient, body fluid and the like in the medical process.
The connecting structure may be a zipper structure.
The head cover body sequentially comprises a skin-friendly layer, a pipeline layer, an isolation layer, a supporting layer and an oily film layer from inside to outside. The oily film layer has hydrophobicity, and reduces liquid and the like from attaching to the outer side of the protective hood.
The pipeline layer is provided with a plurality of ventilation channels; the skin-friendly layer is provided with a through hole communicated with the ventilation pore channel; the top of the head cover body is provided with a circulating ventilation device; the circulating ventilation device is communicated with the ventilation hole channel through a connecting pipe.
When the protective hood is used, the air inside the protective hood can be circulated and purified through the ventilation hole of the pipeline layer and the through hole of the skin-friendly layer by the circulating ventilation device, and the discomfort of a user is reduced. And at the same time, sweat and the like absorbed by the skin-friendly layer are properly discharged.
Furthermore, the skin-friendly layer is made of combed cotton in a weaving mode.
The combed cotton is soft in material, the skin of a user is not easily crushed after long-time use, and the combed cotton has strong water absorption and is beneficial to sweat and ventilation.
Furthermore, the two sides of the opening capable of being opened and closed are provided with tightness adjusting mechanisms; the tightness adjusting mechanism is used for adjusting the tightness degree of the head cover body.
At this time, the protective hood can be effectively and quickly fixed on the head of a user through the tightness adjusting mechanism.
Furthermore, the tightness adjusting mechanism comprises a movable sheet and a fixed sheet; the movable sheet and the fixed sheet are respectively fixed on two sides of the opening and closing opening; one side of the movable sheet, which is far away from the fixed sheet, is fixedly connected with the head cover body; the other side of the movable sheet extends towards the fixed sheet; when the tightness adjusting mechanism is used, the movable sheet is locally connected and covered on the fixed sheet, and the opening can be opened and closed at the moment, and the connecting structure is positioned on the inner side of the tightness adjusting mechanism.
The movable sheet and the fixed sheet of the tightness adjusting structure can be of a magic tape combined structure, a flexible magnetic block and a magnetic sheet combined structure, or other structures with an adhesion function. The tightness adjusting structure is simple, convenient and quick to use and operate.
Further, the connecting pipe comprises an air inlet connecting pipe and an air outlet connecting pipe; the circulating ventilation device comprises a circulating pump, an air inlet module, a purification module and an external port; a filter element is arranged in the purification module; the outer port is arranged at a position close to the filter element. The circulating ventilation device is communicated with the protective hood through the connecting pipe to realize circulating ventilation and air purification.
Furthermore, the supporting layer positioned at the top of the head cover body is provided with a mounting opening matched with the circulating ventilation device; a reinforcing ring is arranged on the inner side of the mounting opening; the circulating ventilation device is detachably arranged at the top of the head cover body through a reinforcing ring; a curved surface top plate is arranged on the inner side of the top of the head cover body; a supporting frame is connected between the curved surface top plate and the circulating ventilation device; the connecting pipe is positioned between the head cover body and the curved surface top plate.
Furthermore, a soft cushion layer is arranged below the curved top plate. The soft cushion layer can play a certain shock absorption function and is also beneficial to the curved surface top plate to abut against the top of the head of a user.
Furthermore, two sides of the upper part of the head cover body are respectively provided with a cover seat; the transparent mask is arranged on the front side of the face opening; the rear side edge of the transparent mask is detachably arranged on the mask seat.
The detachable transparent mask may further protect the user from spitting, liquid splashing, etc. during medical procedures.
A method of using a protective headgear, comprising: the method comprises the following steps:
s1: wearing operation:
opening the connecting structure to open the opening and close the opening, and wearing the head cover body and the shawl part on the head of the user;
then the opening can be opened and closed through the connection structure; the tightness adjusting mechanism is adjusted to fix the head cover body on the head of a user;
when the head-wearing clothes are worn, the curved surface top plate is pressed against the top of the head of a user;
s2: and (3) ventilating operation:
starting the circulating ventilation device to make the air in the head cover body circularly flow and exchange and circulate with the external air through the circulating ventilation device;
s3: wearing a transparent mask:
the side edge of the transparent mask is fixedly arranged on the mask seat.
The invention has simple and convenient use and operation, and all the parts are detachably connected, thereby being convenient for wearing and use.
By adopting the technical scheme, the invention has the beneficial effects that:
1. the invention can circulate and purify the air in the protective hood through the ventilation hole of the pipeline layer and the through hole of the skin-friendly layer by the circulating ventilation device, thereby reducing the discomfort of a user. Meanwhile, sweat and the like absorbed by the skin-friendly layer are properly discharged, so that the exhaust and ventilation between the inside and the outside of the protective hood are improved, and the protective hood is simple in structure and convenient to use.
2. The oily film layer of the protective hood has hydrophobicity, and reduces liquid and the like from being attached to the outer side of the protective hood.
3. The pressure sore prevention filler strip can prevent pressure sores from being generated at the corresponding parts of the face openings after the user uses the head cover body for a long time.
4. The protective hood can be quickly worn and taken off through the opening which can be opened and closed and the connecting structure which is positioned behind the protective hood, and the connecting structure and other parts are prevented from being polluted by splashing of liquid such as liquid medicine, blood of a patient, body fluid and the like in the medical process.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional structural view of a protective headgear of embodiment 1 of the present invention;
FIG. 3 is a rear view of the present invention;
fig. 4 is a rear view of the use state of the present invention.
FIG. 5 is a schematic structural view of example 2;
FIG. 6 is a schematic view showing a structure of connecting the circulation ventilation means and the protective head cover in accordance with embodiment 2;
FIG. 7 is a schematic view of the structure of part A in FIG. 5;
FIG. 8 is a schematic structural view of example 3;
fig. 9 is a schematic structural view of the pressure sore prevention filler strip.
Description of the main reference numerals:
1. a head cover body; 2. wrapping the shoulder; 3. a face opening; 4. the opening can be opened and closed; 5. a connecting structure; 6. a skin-friendly layer; 7. a support layer; 8. an oily film layer; 9. a mask; 10. a tightness adjusting mechanism; 11. a movable plate; 12. a fixing sheet; 13. a pipe layer; 14. an isolation layer; 15. a vent passage; 16. a through hole; 17. a circulating ventilation device; 18. connecting pipes; 19. a circulation pump; 20. an air intake module; 21. a purification module; 22. an outer port; 23. a filter element; 24. an installation port; 25. a reinforcing ring; 26. a curved top plate; 27. a support frame; 28. a soft cushion layer; 29. a mask base; 30. a transparent mask; 31. pressure sore prevention filler strips; 32. a sponge layer; 33. a gel layer.
Detailed Description
The invention is further described below with reference to the figures and the specific embodiments.
The directional phrases used in this disclosure include, for example: the directional terms such as up, down, left, right, inner, outer, etc. are used only with reference to the orientation of the attached FIG. 1 of the specification. Accordingly, the directional terminology used is intended to be illustrative only and is not intended to be limiting of the invention.
Example 1
As shown in FIGS. 1 to 4, the present invention describes a protective head cover comprising a head cover body 1, a shoulder portion 2 attached to the lower surface of the head cover body 1, a face opening 3 located at the front of the head cover body 1, and an openable and closable opening 4 located at the rear of the head cover body 1.
When in use, a user can wear the mask 9 first and then use the protective head cover of the invention.
The opening 4 which can be opened and closed extends downwards to the lower end of the shoulder part 2; the two sides of the opening 4 are provided with connecting structures 5; the head cover body 1 and the shawl part 2 are integrally manufactured.
As shown in fig. 9, the inner sides of the periphery of the face opening 3 are provided with pressure sore prevention filler strips 31; the pressure sore prevention filler strip 31 is sequentially provided with a sponge layer 32 and a gel layer 33 towards the head cover body. The pressure sore prevention filler strip 31 can prevent pressure sores from being generated at the corresponding parts of the face openings 3 after the user uses the head cover body for a long time.
The protective hood can be quickly worn and taken off through the opening 4 which can be opened and closed and the connecting structure 5 which are positioned behind the protective hood, and the positions of the connecting structure 5 and the like are prevented from being polluted by splashing of liquid such as liquid medicine, blood of a patient, body fluid and the like in the medical process.
The connecting structure 5 may be a zipper structure.
The head mask body 1 sequentially comprises a skin-friendly layer 6, a supporting layer 7 and an oily film layer 8 from inside to outside. The supporting layer 7 is made of silica gel.
The oily film layer 8 has hydrophobicity, and reduces the attachment of liquid and the like on the outer side of the protective head cover.
The skin-friendly layer 6 is made of combed cotton by weaving. The supporting layer 7 is made of a material harder than combed cotton.
The combed cotton is soft in material, the skin of a user is not easily crushed after long-time use, and the combed cotton has strong water absorption and is beneficial to sweat and ventilation.
The two sides of the opening 4 are provided with tightness adjusting mechanisms 10; the tightness degree adjusting mechanism 10 is used for adjusting the tightness degree of the head cover body 1.
At this time, the protective hood can be effectively and rapidly fixed on the head of the user by the tightness adjusting mechanism 10.
The tightness adjusting mechanism 10 comprises a movable sheet 11 and a fixed sheet 12; the movable plate 11 and the fixed plate 12 are respectively fixed on two sides of the opening 4; one side of the movable sheet 11, which is far away from the fixed sheet 12, is fixedly connected with the head cover body 1; the other side of the movable sheet 11 extends to the fixed sheet 12; when the tightness adjusting mechanism 10 is used, the movable sheet 11 is partially connected and covered on the fixed sheet 12, and at the moment, the opening 4 can be opened and closed, and the connecting structure 5 is positioned at the inner side of the tightness adjusting mechanism 10.
The movable 11 pieces and the fixing pieces 12 of the tightness adjusting structure 10 may be a magic tape combined structure, a flexible magnetic block and a magnetic sheet combined structure, or other structures with an adhesion function. The tightness adjusting structure 10 is simple and fast to use and operate.
Example 2
Based on the embodiment 1, as shown in fig. 5 to 7, a duct layer 13 and an isolation layer 14 are further arranged between the skin-friendly layer 6 and the support layer 7; the pipeline layer 13 is provided with a plurality of air vent channels 15; the skin-friendly layer 6 is provided with a through hole 16 communicated with the vent hole channel 15; the top of the head cover body 1 is provided with a circulating ventilation device 17; the circulating ventilation device 17 is communicated with the ventilation duct 15 through a connecting pipe 19.
When in use, the air inside the protective hood can be circulated and purified through the ventilation hole channels 15 of the pipeline layer 13 and the through holes 16 of the skin-friendly layer 6 by the circulating ventilation device 17, so that the discomfort of a user is reduced. While properly discharging sweat and the like adsorbed by the skin-friendly layer 6.
The circulating ventilation device 17 comprises a circulating pump 19, an air inlet module 20, a purification module 21 and an external port 22; a filter element 23 is arranged in the purification module 21; the outer port 22 is provided in a portion close to the filter element 23. The circulating ventilation device 17 is communicated with the protective hood through a connecting pipe 18 to realize circulating ventilation and air purification.
The supporting layer 7 positioned at the top of the head cover body 1 is provided with a mounting opening 24 matched with the circulating ventilation device 17; a reinforcing ring 25 is arranged on the inner side of the mounting opening 24; the reinforcing ring 25 may be made of plastic or metal, and the hardness of the reinforcing ring is greater than that of the protective head cover.
The circulating ventilation device 17 is detachably arranged at the top of the head cover body 1 through a reinforcing ring 25; a curved top plate 26 is arranged on the inner side of the top of the head cover body 1; a supporting frame 27 is connected between the curved surface top plate 26 and the circulating ventilation device 17; the connecting pipe 28 is positioned between the head cover body 1 and the curved top plate 26.
The circulating ventilation device 17 is detachably connected to the top of the protective hood, so that the daily maintenance of the device is convenient; and the cleaning and disinfection operations of the protective head cover are convenient after the protective head cover is detached.
A cushion layer 28 is arranged below the curved top plate 26. The cushion layer 28 may provide some cushioning and may also help the curved top plate 26 to rest against the top of the user's head.
Example 3
Based on embodiment 1 or embodiment 2, as shown in fig. 8, two sides of the upper portion of the head cover body 1 of the present invention are respectively provided with a cover seat 29; a transparent face mask 30 is arranged at the front side of the face opening 3; the rear side of the transparent mask 30 is detachably mounted to the mask base 29.
The detachable transparent mask 30 may further protect the user from spit, liquid spray, etc. during medical procedures.
Example 4
A method of using a protective headgear, comprising: the method comprises the following steps:
s1: wearing operation:
opening the connecting structure to open the opening and close the opening, and wearing the head cover body and the shawl part on the head of the user;
then the opening can be opened and closed through the connection structure; the tightness adjusting mechanism is adjusted to fix the head cover body on the head of a user;
when the head-wearing clothes are worn, the curved surface top plate is pressed against the top of the head of a user;
s2: and (3) ventilating operation:
starting the circulating ventilation device to make the air in the head cover body circularly flow and exchange and circulate with the external air through the circulating ventilation device;
s3: wearing a transparent mask:
the side edge of the transparent mask is fixedly arranged on the mask seat.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A protective hood, characterized by: comprises a head cover body, a shoulder part connected below the head cover body, a face opening positioned in front of the head cover body and an opening which can be opened and closed and positioned behind the head cover body; the inner sides of the periphery of the face opening are provided with pressure sore prevention filler strips; the pressure sore prevention filler strip is sequentially provided with a sponge layer and a gel layer towards the head cover body; the opening capable of being opened and closed extends downwards to the lower end of the shoulder part; connecting structures are arranged on two sides of the opening capable of being opened and closed; the head cover body and the shawl part are integrally manufactured; the head cover body sequentially comprises a skin-friendly layer, a pipeline layer, an isolation layer, a supporting layer and an oily film layer from inside to outside; the pipeline layer is provided with a plurality of ventilation channels; the skin-friendly layer is provided with a through hole communicated with the ventilation pore channel; the top of the head cover body is provided with a circulating ventilation device; the circulating ventilation device is communicated with the ventilation hole channel through a connecting pipe.
2. A protective hood as claimed in claim 1, wherein: the skin-friendly layer is made of combed cotton by weaving.
3. A protective hood as claimed in claim 1, wherein: the two sides of the opening capable of being opened and closed are provided with tightness adjusting mechanisms; the tightness adjusting mechanism is used for adjusting the tightness degree of the head cover body.
4. A protective hood as claimed in claim 3, wherein: the tightness adjusting mechanism comprises a movable sheet and a fixed sheet; the movable sheet and the fixed sheet are respectively fixed on two sides of the opening and closing opening; one side of the movable sheet, which is far away from the fixed sheet, is fixedly connected with the head cover body; the other side of the movable sheet extends towards the fixed sheet; when the tightness adjusting mechanism is used, the movable sheet is locally connected and covered on the fixed sheet, and the opening can be opened and closed at the moment, and the connecting structure is positioned on the inner side of the tightness adjusting mechanism.
5. A protective hood as claimed in claim 1, wherein: the supporting layer is made of a material harder than combed cotton.
6. A protective hood as claimed in claim 1, wherein: the connecting pipe comprises an air inlet connecting pipe and an air outlet connecting pipe; the circulating ventilation device comprises a circulating pump, an air inlet module, a purification module and an external port; a filter element is arranged in the purification module; the outer port is arranged at a position close to the filter element.
7. A protective hood as claimed in claim 1, wherein: the supporting layer positioned at the top of the head cover body is provided with a mounting opening matched with the circulating ventilation device; a reinforcing ring is arranged on the inner side of the mounting opening; the circulating ventilation device is detachably arranged at the top of the head cover body through a reinforcing ring; a curved surface top plate is arranged on the inner side of the top of the head cover body; a supporting frame is connected between the curved surface top plate and the circulating ventilation device; the connecting pipe is positioned between the head cover body and the curved surface top plate.
8. A protective hood as claimed in claim 7, wherein: and a soft cushion layer is arranged below the curved surface top plate.
9. A protective hood as claimed in claim 1, wherein: two sides of the upper part of the head cover body are respectively provided with a cover seat; the transparent mask is arranged on the front side of the face opening; the rear side edge of the transparent mask is detachably arranged on the mask seat.
10. A method of using a protective hood according to any one of claims 1 to 9, wherein: the method comprises the following steps:
s1: wearing operation:
opening the connecting structure to open the opening and close the opening, and wearing the head cover body and the shawl part on the head of the user;
then the opening can be opened and closed through the connection structure; the tightness adjusting mechanism is adjusted to fix the head cover body on the head of a user;
when the head-wearing clothes are worn, the curved surface top plate is pressed against the top of the head of a user;
s2: and (3) ventilating operation:
starting the circulating ventilation device to make the air in the head cover body circularly flow and exchange and circulate with the external air through the circulating ventilation device;
s3: wearing a transparent mask:
the side edge of the transparent mask is fixedly arranged on the mask seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010389433.6A CN111420317B (en) | 2020-05-10 | 2020-05-10 | Protective hood and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010389433.6A CN111420317B (en) | 2020-05-10 | 2020-05-10 | Protective hood and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111420317A true CN111420317A (en) | 2020-07-17 |
| CN111420317B CN111420317B (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010389433.6A Active CN111420317B (en) | 2020-05-10 | 2020-05-10 | Protective hood and use method thereof |
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| CN (1) | CN111420317B (en) |
Cited By (1)
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| CN115475341A (en) * | 2022-05-18 | 2022-12-16 | 丁凯 | Medical protection hood for preventing respiratory infection |
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|---|---|---|---|---|
| CN115475341A (en) * | 2022-05-18 | 2022-12-16 | 丁凯 | Medical protection hood for preventing respiratory infection |
| CN115475341B (en) * | 2022-05-18 | 2024-10-25 | 丁凯 | Medical protection hood for preventing respiratory infection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111420317B (en) | 2023-06-27 |
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Inventor after: Ruan Tingyu Inventor before: Liu Yi |
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| CB03 | Change of inventor or designer information |