CN111374786A - Negative pressure mouth gag for preventing aerosol from spreading in stomatology department - Google Patents
Negative pressure mouth gag for preventing aerosol from spreading in stomatology department Download PDFInfo
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- CN111374786A CN111374786A CN202010228759.0A CN202010228759A CN111374786A CN 111374786 A CN111374786 A CN 111374786A CN 202010228759 A CN202010228759 A CN 202010228759A CN 111374786 A CN111374786 A CN 111374786A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/10—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis
- A61B90/14—Fixators for body parts, e.g. skull clamps; Constructional details of fixators, e.g. pins
- A61B90/16—Bite blocks
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/05—Splash shields for protection of the surgeon, e.g. splash guards connected to the apparatus
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/30—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/40—Apparatus fixed or close to patients specially adapted for providing an aseptic surgical environment
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/60—Supports for surgeons, e.g. chairs or hand supports
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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
- A61C19/06—Implements for therapeutic treatment
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/40—Apparatus fixed or close to patients specially adapted for providing an aseptic surgical environment
- A61B2090/401—Apparatus fixed or close to patients specially adapted for providing an aseptic surgical environment using air flow
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Veterinary Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Dentistry (AREA)
- Neurosurgery (AREA)
- Epidemiology (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention provides a negative pressure mouth gag for preventing aerosol from spreading in stomatology department, which relates to the technical field of oral medical instruments and comprises a mouth gag and a transparent mask mouth box, wherein the mouth gag comprises a lip support for opening lips and a foam absorbing cover attached to the wall of the mouth cavity, suction holes are densely distributed on the inner surfaces of the mask mouth box and the foam absorbing cover, and the suction holes are communicated with a first negative pressure generating device. The mouth covering box comprises a sealing cover connected to the mouth covering part on the periphery of the lips and an operation box fixed on the mouth covering part, the operation box is connected with supporting legs in a pivot mode, a flexible operation opening is arranged on the operation box in a sealing mode, a magnifying glass is embedded into one side of the flexible operation opening, and a hand rest frame is arranged inside the operation box. Solves the problem that aerosol is scattered in the oral treatment process in the prior art.
Description
Technical Field
The invention relates to the technical field of oral medical instruments, in particular to a negative pressure mouth gag for preventing aerosol from spreading in stomatology department.
Background
Many diseases can be transmitted by aerosol or aerosol, such as novel coronary pneumonia, atypical pneumonia, influenza, tuberculosis, measles, etc., infected people can transmit viruses to surrounding people by secretions and aerosol discharged by coughing, sneezing, etc., and the disease transmitted by aerosol is fast in transmission speed and extremely harmful. In the clinical operation process of the department of stomatology, a large amount of aerosol and aerosol are generated in the process of using a high-speed turbine mobile phone, an ultrasonic dental scaler and the like together, so that the department of stomatology or an oral clinic becomes a high-risk place for epidemic diseases during the epidemic period of certain infectious diseases, and the life safety of surrounding medical staff and other patients who visit the department at the same time is threatened.
During the epidemic of the new coronavirus pneumonia (COVID-19), the daily work of most oral medical institutions in China is greatly influenced, and in order to reduce the possibility of nosocomial infection, conventional equipment such as a high-speed turbine cannot be normally used, and the medical activities are basically stagnated. In the past, a diagnosis and treatment room capable of accommodating more than five patients to see a doctor at the same time can only receive one patient at a time for the sake of safety, so that the diagnosis and treatment efficiency is greatly reduced, a plurality of patients cannot be treated in time, and the pain is very great; the aerosol spreading disease can be controlled in several months, which causes great economic loss to oral industry in China and even in the whole world, only the annual output value of oral medical industry in China is hundreds of billions of RMB, and the monthly loss of the industry is measured in billions during the epidemic period of the novel coronavirus pneumonia, so that an apparatus which can effectively prevent the aerosol from spreading in the process of treating the oral disease is urgently needed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a negative pressure mouth gag for preventing aerosol from spreading in stomatology, which solves the problem that the aerosol spreads in the oral treatment process in the prior art.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the utility model provides a negative pressure mouth gag that department of stomatology prevented aerosol from scattering, it includes mouth gag and transparent cover muzzle, and the mouth gag is including the lip support that struts the lip and paste in the suction foam cover of oral cavity wall, and the equal intensive distribution of the internal surface of cover muzzle and suction foam cover has the hole of inhaling, inhales the hole and produces the device intercommunication with first negative pressure.
The mouth covering box comprises a sealing cover connected to the mouth covering part on the periphery of the lips and an operation box fixed on the mouth covering part, the operation box is connected with supporting legs in a pivot mode, a flexible operation opening is arranged on the operation box in a sealing mode, a magnifying glass is embedded into one side of the flexible operation opening, and a hand rest frame is arranged inside the operation box.
Furthermore, a tongue protection frame extending into the oral cavity is fixed on the lip support, a tongue cavity for putting in a tongue is arranged on the back surface of the tongue protection frame, and an illuminating lamp is arranged on the tongue protection frame. A saliva suction pipe communicated with the second negative pressure generating device is fixed on the front surface of the tongue protecting frame. The tongue cavity is used for placing the tongue of a patient, so that the comfort of the patient in the oral treatment process can be improved; and the tongue protective frame forms a partition between the tongue and the teeth, so that the tongue can be prevented from being injured in the treatment process; can illuminate the inside of the oral cavity through the illuminating lamp, so that doctors can clearly observe the inside condition of the oral cavity, and the smooth operation is facilitated.
Furthermore, the lip support comprises two lip brackets which are arranged in a bilateral symmetry mode and have openings facing to the outside, and the two lip brackets are respectively connected to two ends of the U-shaped elastic support in a pivot mode. The lip bracket is used for accommodating and propping open the lips on two sides of the oral cavity of a patient so as to provide a doctor with enough operation space and also play a role in protecting the lips; elastic support can provide two lips and hold in the palm certain deflection between the groove, and the lip is held in the palm groove and elastic support pivotal connection, can adjust the angle that the lip held in the palm the groove, and then makes the lip hold in the palm can laminate with patient's lip more, increases patient's travelling comfort and fixed stability.
Furthermore, the lower parts of the two lip support grooves are connected with a saliva suction pipe in a clamping mode through clamping rings, and the saliva suction pipe is communicated with the second negative pressure generating device. The saliva straw can absorb the saliva of oral cavity in time and collect the processing, avoids the progress that the saliva influences the operation, very big improvement medical personnel's work efficiency.
Further, the foam absorbing cover is a flexible cover supported on the inner wall of the oral cavity through a framework. Because the foam suction cover is placed in the oral cavity of a patient to suck away aerosol generated in the oral cavity, the flexible cover can increase the comfort of the patient, and the framework supports the sufficient operation space in the oral cavity, so that the flexible cover is prevented from interfering the operation of a doctor.
Further, flexible operation mouth is provided with the elasticity mouth including being fixed in the flexible barrier cloth on the control box on the flexible barrier cloth. The flexible operation mouth is used for supplying doctor's hand to stretch into and treats patient's oral cavity, and the elasticity mouth is used for tieing up with doctor's hand, prevents that the aerosol in the control box from spreading, and the aerosol can be kept apart to the barrier cloth.
Further, the hand rest frame is including supplying the bracket that hand put into, and the bracket is fixed in screw nut through the connecting rod on, screw nut threaded connection is on the lead screw, and the lead screw passes through motor drive and rotates. Because the doctor is carrying out the treatment in-process to the patient, the hand is surrounded by aerosol, needs to let doctor's hand take out from the control box as few as possible, and the doctor can the starter motor remove the bracket to flexible operation mouth department and supply the doctor to place the hand and take a rest after the hand is tired, and the starter motor reversal removes the bracket to the place of keeping away from flexible operation mouth after the rest is accomplished to in order not to occupy doctor's operating space.
Furthermore, a folding box is fixed on the operation box, the folding box comprises a fixed box provided with a motor, a drawing box is connected to the fixed box in a sliding mode, and a screw nut is fixed to the drawing box. So that the drawing box can move along with the movement of the screw nut to support the bracket.
Furthermore, two sides of the drawing box are connected with the fixed box through slide rails. The slide rail can reduce the frictional force of pull case for fixed case pull in-process, makes the slip more smooth and easy, and can provide stable glide path.
Further, an arc-shaped bayonet is arranged on the cover opening part, a sealing strip is fixed on the arc-shaped bayonet, and a binding band is arranged on the cover opening part. The arc bayonet can be attached to the periphery of the lip of the patient, the sealing performance can be improved through the sealing strip, and the comfort of the patient can be improved due to the softness of the sealing strip; the straps can be strapped to the patient's head for securing the mask oral box.
The invention has the beneficial effects that: the lip support in the mouth gag can spread the lips to expose the internal condition of the mouth of a patient to the visual field of a doctor sufficiently, so that the doctor can operate enough space. The combination of the lip support and the tongue protection frame can stabilize the positions of the lips of the patient and each structure in the oral cavity, so that a stable and unchangeable operation space can be formed in the brain by a doctor, and the accuracy of operation is improved.
The foam suction cover attached to the oral cavity wall sucks away aerosol in the oral cavity through negative pressure generated by the first negative pressure generating device, so that the visual field definition of a doctor is improved, the amount of the aerosol entering the oral cavity is reduced, even if part of the aerosol reaches the oral cavity, the aerosol can be isolated through the cover mouth box and is sucked away by the suction hole arranged on the cover mouth box, the aerosol is prevented from entering air to propagate viruses, and the oral cavity treatment can be safely carried out even in the aerosol disease epidemic period.
The cover oral cavity case is used for being connected with patient's face sealing, and the doctor is treated patient's oral cavity through the flexible operation mouth in going deep into the cover oral cavity case, and the magnifying glass can enlarge patient's oral cavity picture, and the doctor of being convenient for sees patient's oral cavity condition clearly more clearly, and the support that the support of doctor's hand can in time be provided to the hand rest frame that sets up makes doctor's hand can relax the rest in the cover oral cavity case, reduces the number of times that the doctor's hand shifts out the cover oral cavity case.
Drawings
Fig. 1 is a front structure schematic diagram of an opener in a negative pressure opener for preventing aerosol from spreading in the department of stomatology.
FIG. 2 is a schematic top view of the mouth gag in the negative pressure mouth gag for preventing aerosol spreading in the stomatology department.
Fig. 3 is a schematic top view of a mask box in a negative pressure mouth gag for preventing aerosol from spreading in stomatology department.
Fig. 4 is a front structural schematic diagram of a mask box in a negative pressure mouth gag for preventing aerosol from spreading in the department of stomatology.
Fig. 5 is an internal structure view of the hand rest of fig. 4.
Wherein, 1, a mouth gag; 11. a lip bracket; 111. a labial bracket; 112. an elastic support; 113. a snap ring; 12. a foam absorbing cover; 121. a framework; 2. a cover box; 21. a cover opening part; 211. a sealing strip; 212. binding bands; 22. an operation box; 221. a flexible operation port; 222. a magnifying glass; 23. a hand rest frame; 231. a bracket; 232. a connecting rod; 233. a lead screw nut; 234. a lead screw; 235. a motor; 236. a fixed box; 237. drawing the box; 24. supporting legs; 241. a support bar; 242. a supporting seat; 3. sucking holes; 4. a tongue fender bracket; 41. an illuminating lamp; 5. a saliva straw; 6. an aerosol straw.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
The negative pressure mouth gag for preventing aerosol from spreading in stomatology department comprises a mouth gag 1 and a transparent mask mouth box 2. As shown in FIG. 1, the mouth gag 1 comprises a lip support 11 to spread the lips open and a foam absorbing cover 12 to be attached to the wall of the mouth cavity. The inner surfaces of the cover port box 2 and the foam suction cover 12 are densely distributed with suction holes 3, and the suction holes 3 are communicated with the first negative pressure generating device. As shown in fig. 3, the cover box 2 includes a cover opening 21 for sealing the periphery of the lips and an operation box 22 fixed to the cover opening 21. The support legs 24 are pivotally connected to the operation box 22, the flexible operation opening 221 is hermetically arranged on the operation box 22, a magnifying glass 222 is embedded in one side of the flexible operation opening 221, the magnifying glass 222 is made of plastic, and the hand rest frame 23 is arranged inside the operation box 22.
As shown in fig. 1, the lip bracket 11 includes two lip brackets 111 which are symmetrically disposed and open outward, and the two lip brackets 111 are pivotally connected to both ends of a U-shaped elastic bracket 112. A tongue protecting frame 4 extending into the oral cavity is fixed on the lip support 11, a tongue cavity for putting the tongue is arranged on the back surface of the tongue protecting frame 4,
the lower parts of the two lip brackets 111 are integrally formed with snap rings 113, through holes are reserved in the middles of the snap rings 113, the saliva suction pipe 5 can be introduced into the bottom of the oral cavity from the through holes in the snap rings 113 to suck the generated saliva, and the saliva suction pipe 5 is communicated with a second negative pressure generating device. Illuminating lamps 41 are symmetrically arranged on two sides of the tongue protection frame 4, and the illuminating lamps 41 are LED lamps and are powered by button batteries.
The foam absorbing cover 12 is a flexible cover supported on the oral cavity wall by the framework 121. The preferential silica gel material that adopts of flexible cover has the intermediate layer chamber in the centre of flexible cover, runs through the setting on the inlayer of flexible cover and inhales hole 3, inhales hole 3 and intermediate layer chamber intercommunication, and flexible cover is connected as an organic wholely with lip support groove 111, and lip support groove 111 is inside also to be the cavity, this cavity and intermediate layer chamber intercommunication for the intercommunication is inhaled foam cover 12 and can be connected on lip support groove 111 with the aerosol straw 6 of first negative pressure generating device, in order to avoid occuping the limited space in the oral cavity. The flexible cover mainly includes the side with controlling the cheek laminating, with the top surface of palace laminating to and keep off at the back of throat mouth, the leading to tooth hole that confession upper row tooth passed is left to the front side of top surface, and the rear side and the side of top surface are connected as an organic wholely. The backbone 121 is supported at the intersection of the sides, top and back of the flexible cover, providing more operating space through the support of the backbone 121.
The mask box 2 also centralizes and uniformly processes the absorbed aerosol in a sandwich cavity mode. The first negative pressure generating device and the second negative pressure generating device can provide negative pressures with different pressures to suck away aerosol and saliva respectively, and the aerosol and the saliva are absorbed into a unified disinfection box for disinfection treatment.
As shown in fig. 4, the two sides of the operation box 22 are symmetrically and pivotally connected with supporting legs 24, each supporting leg 24 comprises a supporting rod 241 which is formed by connecting an internal threaded pipe and a stud in a threaded manner and can adjust the length, and a supporting seat 242 fixed at the bottom of the supporting rod, and the operation box 22 can be supported on the ground through the supporting legs 24, so that the squeezing effect of the operation box 22 on the face of a patient is reduced, and the comfort of the patient is improved. The support leg 24 is pivotally connected to the console box 22, and the support leg 24 can rotate around the connected pivot, so that the support leg can adjust the included angle between the support leg and the console box 22 according to different degrees of supine lying of the patient, thereby ensuring effective support on the ground all the time.
As shown in fig. 4, the flexible operation opening 221 includes a flexible isolation cloth fixed to the operation box 22, and an elastic opening is provided in the middle of the flexible isolation cloth. The flexible isolation cloth is composed of a layer of melt-blown cloth and a layer of waterproof cloth so as to effectively prevent aerosol from penetrating through the flexible isolation cloth. The elastic band is fixed on the elastic opening, a doctor penetrates through the elastic opening to stretch the hand into the cover opening box 2, a circle of sealing strip is pasted on the wrist of the doctor, and the elastic opening is tightly hooped on the sealing strip so as to increase the sealing performance and the comfort of the wrist of the doctor.
As shown in fig. 5, the hand rest 23 includes a bracket 231 for placing a hand therein, the bracket 231 is fixed to a lead screw nut 233 by a connecting rod 232, the lead screw nut 233 is screwed to a lead screw 234, and the lead screw 234 is driven to rotate by a motor 235. A folding box is fixed on the operation box 22, the folding box comprises a fixed box 236 provided with a motor 235, a drawing box 237 is connected on the fixed box 236 in a sliding way, and a screw nut 233 is fixed on the drawing box 237. Both sides of the drawing case 237 are connected with the fixed case 236 by slide rails, and the drawing case 237 and the fixed case 236 form a drawer shape, so that the drawing case 237 can move along with the lead screw nut 233 to support the bracket 231.
An arc-shaped bayonet is arranged on the cover opening portion 21, a sealing strip 211 is fixed on the arc-shaped bayonet, half binding bands 212 are fixed on two sides of the cover opening portion 21 respectively, and a fastening buckle is fixed on the half binding bands 212 for fixing, so that the binding bands 212 can be wound to the back of the head portion from two sides for fastening and fixing.
During the use, block the lip support 11 in the mouth gag 1 to the patient on the lip earlier, then with inhaling on foam cover 12 is connected to first negative pressure produces the device, be connected to saliva straw 42 on the second negative pressure produces the device, then hold the instrument that will use through one medical personnel and put patient's mouth limit in one hand, another medical personnel is close to the patient with cover oral cavity 2, former medical personnel another hand stretches into from flexible operation mouth 221 and holds the instrument that needs to use, another medical personnel covers cover oral cavity 2 seal to close around patient's lip and fix to patient's head through bandage 212. With cover oral cavity case 2 and first negative pressure generating device connection, then fix the round sealing strip on the doctor's wrist that needs diagnose to the patient, let doctor's both hands stretch into in the cover oral cavity case, let the elasticity mouth on the flexible operation mouth tighten the sealing strip on the wrist, open first negative pressure generating device and second negative pressure generating device, and operate through the oral cavity picture that magnifying of magnifying glass 222 selectively as required, if after the arm is sour soft, let assistant starter motor 235 send bracket 231 to flexible operation mouth 221 department and hold the hand of doctor, make the hand relax and carry out abundant rest, after having a rest, restart motor 235 reversal moves bracket 231 to initial position.
Claims (10)
1. The negative pressure mouth gag for preventing aerosol from spreading in the department of stomatology is characterized by comprising a mouth gag (1) and a transparent mouth covering box (2), wherein the mouth gag (1) comprises a lip support (11) for opening lips and a foam absorbing cover (12) attached to the wall of the mouth cavity, suction holes (3) are densely distributed on the inner surfaces of the mouth covering box (2) and the foam absorbing cover (12), and the suction holes (3) are communicated with a first negative pressure generating device;
cover mouth case (2) including sealed lid connect in cover oral area (21) around the lip with be fixed in operation box (22) on cover oral area (21), pivot connection has supporting legs (24) on operation box (22), sealed flexible operation mouth (221) that is provided with on operation box (22), one side of flexible operation mouth (221) is inlayed and is equipped with magnifying glass (222), operation box (22) inside is provided with hand rest frame (23).
2. The negative pressure mouth gag for preventing aerosol from spreading in the department of stomatology of claim 1, characterized in that a tongue protection frame (4) extending into the mouth is fixed on the lip support (11), a tongue cavity for putting in the tongue is arranged on the back of the tongue protection frame (4), and an illuminating lamp (41) is arranged on the tongue protection frame (4).
3. The negative pressure mouth gag for preventing aerosol from spreading in the department of stomatology of claim 1, characterized in that the lip support (11) comprises two labial brackets (111) with openings facing outward, the two labial brackets (111) are respectively pivotally connected to two ends of a U-shaped elastic support (112).
4. The negative pressure mouth gag for preventing aerosol from spreading of department of stomatology of claim 3, characterized in that the lower parts of the two labial bracket (111) are clamped with a saliva suction tube (5) through a snap ring (113), and the saliva suction tube (5) is communicated with a second negative pressure generating device.
5. The oral negative pressure mouth gag preventing aerosol dissemination according to claim 1, characterised in that the entrainment shield (12) is a flexible shield supported on the oral cavity wall by a skeleton (121).
6. The negative pressure mouth gag for preventing aerosol from spreading of department of stomatology according to claim 1, characterized in that the flexible operation port (221) comprises a flexible isolation cloth fixed on the operation box (22), and the flexible isolation cloth is provided with a tightness port.
7. The negative pressure mouth gag for preventing aerosol from spreading of stomatology according to claim 1, characterised in that the hand rest stand (23) comprises a bracket (231) for hand insertion, the bracket (231) is fixed to a lead screw nut (233) by a connecting rod (232), the lead screw nut (233) is screwed to a lead screw (234), and the lead screw (234) is driven to rotate by a motor (235).
8. The negative pressure mouth gag for preventing aerosol from spreading of department of stomatology according to claim 7 is characterized in that a folding box is fixed on the operation box (22), the folding box comprises a fixed box (236) provided with the motor (235), a pulling box (237) is connected on the fixed box (236) in a sliding way, and the lead screw nut (233) is fixed on the pulling box (237).
9. The negative pressure mouth gag for preventing aerosol scattering of the stomatological department according to claim 8, characterized in that both sides of the pull box (237) are connected with the fixed box (236) by slide rails.
10. The negative pressure mouth gag for preventing aerosol from spreading of the department of stomatology of claim 1, characterized in that an arc-shaped bayonet is arranged on the cover mouth part (21), a sealing strip (211) is fixed on the arc-shaped bayonet, and a binding band (212) is arranged on the cover mouth part (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010228759.0A CN111374786B (en) | 2020-03-27 | 2020-03-27 | Negative pressure mouth gag for preventing aerosol from spreading in stomatology department |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010228759.0A CN111374786B (en) | 2020-03-27 | 2020-03-27 | Negative pressure mouth gag for preventing aerosol from spreading in stomatology department |
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| Publication Number | Publication Date |
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| CN111374786A true CN111374786A (en) | 2020-07-07 |
| CN111374786B CN111374786B (en) | 2021-03-30 |
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