CN112294484A - Isolating device for isolating droplet propagation in oral treatment - Google Patents
Isolating device for isolating droplet propagation in oral treatment Download PDFInfo
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- CN112294484A CN112294484A CN202011294185.3A CN202011294185A CN112294484A CN 112294484 A CN112294484 A CN 112294484A CN 202011294185 A CN202011294185 A CN 202011294185A CN 112294484 A CN112294484 A CN 112294484A
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- cover body
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- outer cover
- isolating
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
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- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
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Abstract
The invention discloses an isolating device for isolating spray propagation during oral treatment, which comprises an outer cover body, wherein two half inner cover bodies are symmetrically arranged in the outer cover body, a control rod is rotationally arranged in the outer cover body, through holes matched with the control rod are formed in the side wall of the outer cover body, threaded holes are fixedly formed in the two half inner cover bodies, the control rod penetrates through the threaded holes and is in threaded connection with the threaded holes, the threaded holes in the two half inner cover bodies are arranged in opposite directions, fixing nuts are further in threaded connection with the control rod and are arranged above the two half inner cover bodies, a rotating groove is formed in the control rod, a moving rod is arranged in the rotating groove and penetrates through the rotating groove, and two moving grooves are symmetrically formed in the side wall of the moving rod. The isolation device designed by the invention can be fixedly adjusted according to individuals, and is more comfortable to wear while isolating the spreading of the spray.
Description
Technical Field
The invention relates to the technical field of dental medical machinery, in particular to an isolating device for isolating droplet propagation in oral treatment.
Background
Droplet propagation, i.e. air droplet propagation, is one way of air propagation. Pathogens are excreted by infectious agents through coughing, sneezing, talking and droplets, causing the susceptible person to inhale and become infected. Epidemic encephalitis, scarlet fever, pertussis, influenza, measles and the like are transmitted in this way, generally, droplet transmission can be realized only by contacting with an infection source in a short distance, and is relatively safe beyond 1 m from the infection source, because, without the help of external conditions (such as wind power), the possibility of droplet injection beyond two meters is almost absent, but during cavity treatment, a large amount of droplets are generated, and fall back to doctors and nurses, and treatment tools which can be used in the treatment process, in particular, because of the influence of recent novel coronaviruses, the infection speed and the infection mode of the novel coronaviruses need a special medical isolation device, the traditional droplet isolation device is an isolation device with a shape similar to a funnel, the structure is simple, the cost is low, but the traditional isolation device cannot be based on the actual conditions of individuals, remove the bore that adapts to when every people's mouth enlarges, can produce the gap between isolating device and mouth, unable complete keep apart the droplet, and traditional isolating device fixes in the mouth, fixes through the mouth, and one time can let the people produce tired sense.
Disclosure of Invention
The invention aims to solve the defects in the prior art, such as: traditional isolating device can't be according to individual actual conditions, go to adapt to the bore when every people's mouth opens greatly, can produce the gap between isolating device and mouth, can't be complete keep apart the droplet, and traditional isolating device fixes in the mouth, fixes through the mouth, and time one can let the people produce tired sense, and the isolating device who separates the droplet propagation when proposing one kind and be used for oral treatment.
In order to achieve the purpose, the invention adopts the following technical scheme:
an isolating device for isolating spray propagation in oral treatment comprises an outer cover body, wherein two half inner cover bodies are symmetrically arranged in the outer cover body, a control rod is arranged in the outer cover body in a rotating mode, through holes matched with the control rod are formed in the side wall of the outer cover body, threaded holes are fixedly formed in the two half inner cover bodies, the control rod penetrates through the threaded holes and is in threaded connection with the threaded holes, the threaded holes in the two half inner cover bodies are oppositely arranged in a threaded mode, four symmetrically arranged sliding grooves are fixedly formed in the inner side of the outer cover body, sliding rods are arranged in the four sliding grooves in a sliding mode, the sliding rods penetrate through the sliding grooves and are fixedly connected with the half inner cover bodies, fixing nuts are further in threaded connection on the control rod and are arranged above the two half inner cover bodies, rotating grooves are formed in the control rod, moving rods are arranged in the rotating grooves, the movable rod penetrates through the rotating groove, two moving grooves are symmetrically arranged on the side wall of the movable rod, fixed rods are arranged in the two moving grooves in a sliding mode, the fixed rods penetrate through the moving grooves and are fixedly connected with the side wall of the rotating groove, two fixing grooves are fixedly arranged on the inner side wall of the through hole, a movable plate is arranged in the two fixing grooves and penetrates through the fixing grooves, a sliding groove is formed in the side wall of the fixing groove, a sliding block is arranged in the sliding groove in a sliding mode, the sliding block penetrates through the sliding groove and is fixedly connected with the movable plate, grooves are formed in the two moving rods and located on the outer sides of the fixing grooves, magnets are fixedly arranged in the grooves, a sleeve is sleeved on the outer cover body and is connected with the outer cover body through a connecting device, a conical cylinder is fixedly connected to one side of the sleeve, the opening of the conical, the outer cover body is also provided with a fastening device.
Preferably, the connecting device comprises two connecting grooves symmetrically arranged on the outer side wall of the outer cover body, two connecting rods are slidably arranged in the connecting grooves, a cavity is formed in each connecting rod, two fastening holes are symmetrically and fixedly arranged on the sleeve, the two fastening holes are matched with the connecting grooves, fastening rods are in threaded connection with the fastening holes, the fastening rods penetrate through the fastening holes, and the fastening rods penetrate through the side walls of the connecting rods and are in sliding connection with the cavity in the cavity.
Preferably, fastener includes two deep troughes at the fixed setting of outer cover body lateral wall symmetry, two deep troughed inside wall rotates and is connected with the dwang, sliding sleeve is equipped with the rotor plate on the dwang, two the rotor plate links together through elastic connection area.
Preferably, the moving rod is fixedly connected with a baffle plate positioned on the outer side of the control rod, and a pull ring is fixedly arranged on the baffle plate.
Preferably, the fastening rod is located outside the sleeve and is in threaded connection with a fastening nut.
Preferably, an elastic cloth is fixedly connected between the outer cover body and the two half inner cover bodies.
Compared with the prior art, the invention has the beneficial effects that: the distance between the outer cover body and the two half inner cover bodies is adjusted through the control rod, the outer cover body and the lips are fixed through the elastic connecting band, the propagation of spray can be basically and completely isolated through the elastic cloth connected between the outer cover body and the two half inner cover bodies, the relative distance between the outer cover body and the conical barrel is adjusted through the fastening device, the treatment operation can be more convenient, the device can be fixed on the head of a patient according to different people, fatigue cannot be generated, and the device is high in practicability.
Drawings
FIG. 1 is a schematic view of an isolation device for isolating the propagation of droplets in oral treatment according to the present invention;
FIG. 2 is a left side sectional view of an outer shield body of an isolation device for isolating the propagation of droplets in oral treatment according to the present invention;
fig. 3 is a partial top sectional view of an outer shield body, a rotating lever, a rotating plate and an elastic connecting band in the isolating apparatus for isolating the propagation of droplets in oral treatment according to the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 1;
FIG. 5 is an enlarged view of the structure at B in FIG. 1;
fig. 6 is a right side view of the outer shield body of the insulator for isolating the propagation of droplets in oral treatment according to the present invention.
In the figure: the movable type electromagnetic switch comprises an outer cover body 1, a half inner cover body 2, elastic cloth 3, a threaded hole 4, a control rod 5, a conical barrel 6, a sliding rod 7, a sliding groove 8, a deep groove 9, a rotating rod 10, a rotating plate 11, an elastic connecting belt 12, a moving groove 13, a fixing nut 14, a through hole 15, a baffle plate 16, a moving rod 17, a fixing rod 18, a connecting groove 19, a cavity 20, a sleeve 21, a fastening rod 22, a fastening hole 23, a connecting rod 24, a rotating groove 25, a sliding block 26, a groove 27, a magnet 28, a fixing groove 29, a sliding groove 30 and a moving plate 31.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-6, an isolating device for isolating spray propagation in oral treatment comprises an outer cover body 1, and is characterized in that two half inner cover bodies 2 are symmetrically arranged in the outer cover body 1, an elastic cloth 3 is fixedly connected between the outer cover body 1 and the two half inner cover bodies 2 to prevent spray from flying out from the outer cover body 1 and the two half inner cover bodies 2, a control rod 5 is rotatably arranged in the outer cover body 1, a through hole 15 matched with the control rod 5 is arranged on the side wall of the outer cover body 1, a threaded hole 4 is fixedly arranged on the two half inner cover bodies 2, the control rod 5 penetrates through the threaded hole 4, the control rod 5 is in threaded connection with the threaded hole 4, the threaded holes 4 on the two half inner cover bodies 2 are oppositely arranged, when the control rod 5 is rotated, the two half inner cover bodies 2 can move away from or close to the outer cover body 1, four symmetrically arranged chutes 8 are fixedly arranged on the inner side of the outer cover body 1, sliding rods 7 are arranged in the four sliding grooves 8 in a sliding mode, the sliding rods 7 penetrate through the sliding grooves 8 and are fixedly connected with the half inner covers 2, fixing nuts 14 are further connected to the control rod 5 in a threaded mode, the fixing nuts 14 are arranged above the two half inner covers 2, after the control rod 5 is adjusted, the control rod 5 and the half inner covers 2 are further fixedly connected together, sliding is prevented, a rotating groove 25 is formed in the control rod 5, a moving rod 17 is arranged in the rotating groove 25, the moving rod 17 penetrates through the rotating groove 25, two moving grooves 13 are symmetrically formed in the side walls of the moving rod 17, a baffle 16 is fixedly connected to the outer side of the control rod 5 through the moving rod 17, pull rings are fixedly arranged on the baffle 16, the moving rod 17 is convenient to stretch and rotate, fixing rods 18 are arranged in the two moving grooves 13 in a sliding mode, the fixing rods 18 penetrate through the moving grooves 13 and the side walls of the rotating groove 25 and can, the rotating is convenient, the treatment process cannot be influenced by the control rod 5, the inner side wall of the through hole 15 is fixedly provided with two fixed grooves 29, moving plates 31 are arranged in the two fixed grooves 29, the moving plates 31 penetrate through the fixed grooves 29, the side wall of each fixed groove 29 is provided with a sliding groove 30, a sliding block 26 is arranged in the sliding groove 30 in a sliding manner, the sliding block 26 penetrates through the sliding groove 30 and is fixedly connected with the moving plates 31, the two moving plates 31 are positioned outside the fixed grooves 29 and are provided with grooves 27, magnets 28 are fixedly arranged in the grooves 27, the through hole 15 is sealed under the action of the magnets 28, the situation that the moving rod 17 slides from the control rod 5 due to the movement of a patient in the treatment process is prevented, the outer cover body 1 is sleeved with a sleeve 21, the sleeve 21 is connected with the outer cover body 1 through a connecting device, the connecting device comprises, the connecting rod 24 is internally provided with a cavity 20, the sleeve 21 is symmetrically and fixedly provided with two fastening holes 23, the two fastening holes 23 are matched with the connecting groove 19, the two fastening holes 23 are internally connected with fastening rods 22 in a threaded manner, the fastening rods 22 penetrate through the fastening holes 23, the fastening rods 22 penetrate through the side walls of the connecting rod 24 and are in sliding connection with the cavity 20 in the cavity 20, the connecting rod 24 is connected with the fastening rods 22, the sleeve 21 can be better moved, the fastening rods 22 are positioned on the outer side of the sleeve 21 and are in threaded connection with fastening nuts, the fastening rods 22 are fixed with the sleeve 21, the sleeve 21 and the outer cover body 1 are fixed together, one side of the sleeve 21 is fixedly connected with a conical cylinder 6, an opening of the conical cylinder 6 is arranged rightwards, the outer cover body 1 and the conical cylinder 6 are positioned on two sides of the sleeve 21, the sleeve 21 is moved, the sleeve 21 drives the fixedly connected conical cylinder 6 to move, enlarge or reduce the isolation to the droplet, improve the relevant operation of treatment, still be equipped with fastener on the outer cover body 1 of the outer cover body 1, fastener includes two deep grooves 9 at the fixed setting of outer cover body 1 lateral wall symmetry, two deep grooves 9 inside walls rotate and are connected with dwang 10, sliding sleeve is equipped with rotor plate 11 on dwang 10, two rotor plates 11 link together through elastic connection area 12, fix the outer cover body 1 at patient's head through elastic connection area 12, and not patient's mouth, reduce the tired sense of wearing for a long time and bring, increase the comfort level.
In the invention, one hand holds the outer cover body 1, the inner ring of the outer cover body 1 is sleeved on the opened mouth, so that the outer cover body 1 is sleeved on the lips, the other hand pulls the elastic connecting band 12, the elastic connecting band 12 moves backwards towards the brain by taking the outer cover body 1 as the center, the elastic connecting band 12 is sleeved on the back of the brain, the moving plate 31 which is attracted and fixed by the magnet 28 moves towards two sides, the through hole 15 is opened, and the control rod 5 is adjusted according to individuals, and the specific operation is as follows: loosening the fixing nut 14 from the control rod 5 to rotate the baffle plate 16, stopping rotating the fixing nut 14, pulling the pull ring to move upwards, the pull ring driving the fixedly connected baffle plate 16 to move upwards, the baffle plate 16 driving the fixedly connected movable rod 17 to move upwards, stopping rotating when the individual feels that it is convenient to rotate the baffle plate 16, putting a hand on the baffle plate 16, rotating the baffle plate 16, two half inner shields 2 screwed with the baffle plate 16 through the threaded holes 4 to move towards the side wall of the outer shield 1, when the two half inner shields 2 touch the lips, rotating the baffle plate 16 a little more to make the two half inner shields 2 combined with the inside of the lips tighter, stopping rotating the baffle plate 16, screwing the fixing nut 14 with the other hand, fixing the control rod 5 with the half inner shield 2 positioned at the upper side, loosening the baffle plate 16, the baffle plate 16 and the movable rod 17 fixedly connected with the baffle plate 16, the device is characterized in that the device slides downwards along the fixed rod 18 to return to the initial position, the two moving plates 31 are moved to enable the two moving plates 31 to approach to the center of the through hole 15, the initial position is returned to under the action of the magnet, the through hole 15 is blocked, the baffle 16 and the moving rod 17 fixedly connected with the baffle 16 are prevented from sliding downwards from the through hole 15 when a patient moves, treatment is affected, the operation of fixing the whole device on the lips is completed, then according to the suggestion of a doctor, due to the fact that the treatment mode and the treatment means are different, the possible generated spray angles are different, the relative distance between the conical cylinder 6 and the outer cover body 1 is adjusted, the function of isolating spray can be better completed, and the specific adjusting operation is as follows: when the distance between the cone-shaped cylinder 6 and the outer cover body 1 needs to be increased, firstly, the fastening nut is loosened, the fastening rod 22 is screwed on the fastening hole 23, when the sleeve 21 can be moved, the fastening rod 22 stops rotating, the sleeve 21 is moved to the right relative to the outer cover body 1, the cone-shaped cylinder 6 fixedly connected with the sleeve 21 moves to the right relative to the outer cover body 1, when the cone-shaped cylinder 6 moves to the position suggested by a doctor, the sleeve 21 stops moving, the sleeve 21 is screwed and connected with the fastening rod 22 through the fastening hole 23, the sleeve 21 is fixed on the outer cover body 1 through the fastening rod 22, the fastening nut is screwed, the fastening rod 22 is further fixed, the adjustment on the cone-shaped cylinder 6 is completed, and the related treatment work is started.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The utility model provides an isolating device that separates flying foam propagation during being used for oral treatment, includes the outer cover body (1), its characterized in that, the symmetry is equipped with two half inner cover bodies (2) in the outer cover body (1), outer cover body (1) internal rotation is equipped with control lever (5), outer cover body (1) lateral wall is equipped with through-hole (15) that set up with control lever (5) matching, two fixed threaded hole (4) that are equipped with on half inner cover body (2), control lever (5) run through in threaded hole (4) setting, and control lever (5) and threaded hole (4) threaded connection, two threaded hole (4) the spiral shell on half inner cover body (2) sets up to opposite, outer cover body (1) inboard is fixed and is equipped with spout (8) that four symmetries set up, four slide bar (7) are equipped with in spout (8), slide bar (7) run through in spout (8) and half inner cover body (2) fixed connection, the control rod (5) is further connected with a fixing nut (14) in a threaded manner, the fixing nut (14) is arranged above the two half inner cover bodies (2), a rotating groove (25) is formed in the control rod (5), a moving rod (17) is arranged in the rotating groove (25), the moving rod (17) penetrates through the rotating groove (25) and is arranged, two moving grooves (13) are symmetrically formed in the side wall of the moving rod (17), fixing rods (18) are arranged in the two moving grooves (13) in a sliding manner, the fixing rods (18) penetrate through the moving grooves (13) and the side wall of the rotating groove (25) and are fixedly connected, two fixing grooves (29) are fixedly formed in the inner side wall of the through hole (15), moving plates (31) are arranged in the two fixing grooves (29), the moving plates (31) penetrate through the fixing grooves (29), and sliding grooves (30) are formed in the side wall of the, slide in sliding tray (30) and be equipped with slider (26), slider (26) run through in sliding tray (30) and movable plate (31) fixed connection, two carriage release lever (17) are located fixed slot (29) outside and are equipped with recess (27), recess (27) internal fixation is equipped with magnet (28), the cover is equipped with sleeve (21) on the dustcoat body (1), sleeve (21) are connected with the dustcoat body (1) through connecting device, one side fixed connection of sleeve (21) is equipped with a toper section of thick bamboo (6), the opening of a toper section of thick bamboo (6) sets up right, just the both sides that the dustcoat body (1) and a toper section of thick bamboo (6) are located sleeve (21) set up, still be equipped with fastener on the dustcoat body (1).
2. The isolating device for isolating the propagation of the spray during the oral treatment according to claim 1, wherein the connecting device comprises two connecting slots (19) symmetrically arranged on the outer side wall of the outer cover body (1), a connecting rod (24) is slidably arranged in the two connecting slots (19), a cavity (20) is arranged inside the connecting rod (24), two fastening holes (23) are symmetrically and fixedly arranged on the sleeve (21), the two fastening holes (23) are arranged in a matching manner with the connecting slots (19), a fastening rod (22) is in threaded connection with the two fastening holes (23), the fastening rod (22) is arranged in a manner of penetrating through the fastening holes (23), and the fastening rod (22) is in a sliding connection with the cavity (20) in a manner of penetrating through the side wall of the connecting rod (24).
3. The isolating device for isolating the propagation of the spray during the oral treatment according to claim 1, wherein the fastening device comprises two deep grooves (9) symmetrically and fixedly arranged on the side wall of the outer cover body (1), two inner side walls of the deep grooves (9) are rotatably connected with a rotating rod (10), a rotating plate (11) is slidably sleeved on the rotating rod (10), and the two rotating plates (11) are connected together through an elastic connecting belt (12).
4. The device for isolating the propagation of spray in oral treatment according to claim 1, wherein the moving rod (17) is fixedly connected with a baffle (16) outside the control rod (5), and the baffle (16) is fixedly provided with a pull ring.
5. An isolation device for isolating the propagation of spray during oral treatment according to claim 2, characterized in that the fastening rod (22) is screwed with a fastening nut on the outside of the sleeve (21).
6. An isolation device for isolating the propagation of spray during oral treatment according to claim 1, characterized in that an elastic cloth (3) is fixedly connected between the outer cover body (1) and the two half inner cover bodies (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011294185.3A CN112294484B (en) | 2020-11-18 | 2020-11-18 | Isolating device for isolating droplet propagation in oral treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011294185.3A CN112294484B (en) | 2020-11-18 | 2020-11-18 | Isolating device for isolating droplet propagation in oral treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112294484A true CN112294484A (en) | 2021-02-02 |
| CN112294484B CN112294484B (en) | 2021-09-28 |
Family
ID=74334945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011294185.3A Active CN112294484B (en) | 2020-11-18 | 2020-11-18 | Isolating device for isolating droplet propagation in oral treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112294484B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120140027A (en) * | 2011-06-20 | 2012-12-28 | 신미정 | Oral opening device for use in dentistry |
| CN208909157U (en) * | 2018-08-28 | 2019-05-31 | 遵义医学院附属口腔医院 | One kind protective mask used in periodontal treatment |
| CN111202591A (en) * | 2020-02-27 | 2020-05-29 | 四川大学 | Oral treatment isolator |
| CN111227979A (en) * | 2020-03-17 | 2020-06-05 | 上海交通大学医学院附属第九人民医院 | Isolating device for isolating droplet propagation in oral treatment |
| CN210869978U (en) * | 2020-03-25 | 2020-06-30 | 广州市通力生物技术有限公司 | Novel mask for oral spray protection instrument |
| CN111728299A (en) * | 2020-08-05 | 2020-10-02 | 上海交通大学医学院附属第九人民医院 | Protective mask for isolating spray propagation of patient during oral treatment |
| US20200353296A1 (en) * | 2019-05-10 | 2020-11-12 | Melissa Crenshaw | Designed Medical Mask |
| CN211932696U (en) * | 2020-03-06 | 2020-11-17 | 广州市第一人民医院（广州消化疾病中心、广州医科大学附属市一人民医院、华南理工大学附属第二医院） | Ear hanging type patient droplet isolation mask |
-
2020
- 2020-11-18 CN CN202011294185.3A patent/CN112294484B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120140027A (en) * | 2011-06-20 | 2012-12-28 | 신미정 | Oral opening device for use in dentistry |
| CN208909157U (en) * | 2018-08-28 | 2019-05-31 | 遵义医学院附属口腔医院 | One kind protective mask used in periodontal treatment |
| US20200353296A1 (en) * | 2019-05-10 | 2020-11-12 | Melissa Crenshaw | Designed Medical Mask |
| CN111202591A (en) * | 2020-02-27 | 2020-05-29 | 四川大学 | Oral treatment isolator |
| CN211932696U (en) * | 2020-03-06 | 2020-11-17 | 广州市第一人民医院（广州消化疾病中心、广州医科大学附属市一人民医院、华南理工大学附属第二医院） | Ear hanging type patient droplet isolation mask |
| CN111227979A (en) * | 2020-03-17 | 2020-06-05 | 上海交通大学医学院附属第九人民医院 | Isolating device for isolating droplet propagation in oral treatment |
| CN210869978U (en) * | 2020-03-25 | 2020-06-30 | 广州市通力生物技术有限公司 | Novel mask for oral spray protection instrument |
| CN111728299A (en) * | 2020-08-05 | 2020-10-02 | 上海交通大学医学院附属第九人民医院 | Protective mask for isolating spray propagation of patient during oral treatment |
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| CN112294484B (en) | 2021-09-28 |
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