Multifunctional protective device for oral clinical operation

Abstract

The invention relates to the technical field of medical instruments, in particular to a multifunctional protective device for oral clinical operation, which comprises a mask, a fixing bandage and a supporting bandage are arranged on the mask, and one end of the supporting bandage is fixedly connected with the fixing bandage; tightening assemblies for tightening the fixing bandage and the supporting bandage are arranged between the fixing bandage and the mask and between the supporting bandage and the mask; a driving box is fixedly connected to the side wall of the mask, and a driving assembly used for driving the fixing bandage and the supporting bandage to be tightened is arranged in the driving box. An air bag is fixedly connected to the inner side wall of the mask, and an inflation assembly used for inflating the air bag to be attached to the jaw is further arranged in the driving box. The driving assembly is further used for driving the inflation assembly to inflate the air bag. The gap between the mask and the face can be physically filled from the lower portion of the mask, rising aerosol and pollutants are blocked, comfort and minimum interference on the operation view and flexibility are considered, and the compliance and safety of clinical protection are improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a multifunctional protective device for oral clinical procedures. Background Technology

[0002] In clinical dental procedures, healthcare professionals need to be in close proximity to patients' mouths for extended periods, and their respiratory areas are often exposed to splashes of bodily fluids from the mouth. Currently, healthcare professionals generally wear surgical masks or face shields as basic protection.

[0003] According to a clinical observation case study in "Diagnosis and Treatment of Oral Diseases and Prevention and Control of Cross-infection" (Zhou Huiping, 2003), "Aerosols and contaminants generated in the patient's oral cavity are very easy to rise with the airflow and directly enter the doctor's oral and nasal respiratory tract, posing a significant risk of infection exposure." At the same time, the "Guidelines for the Maintenance and Infection Control of Dental Clinic Instruments" points out that "Some existing protective masks used in dental clinics that attempt to seal are often complex in structure or interfere with commonly used equipment such as glasses and headlamps, seriously affecting the doctor's field of vision, comfort, and flexibility during operation, resulting in low clinical compliance."

[0004] Therefore, the fundamental flaw of existing oral clinical protective measures lies in the lack of effective protection against harmful gases and aerosols entering the doctor's breathing area from below the protective mask. This leads to the dual problems of high infection risk for medical staff and poor clinical applicability of protective measures. Therefore, it is necessary to propose a multifunctional protective device for oral clinical operations to solve the above problems. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a multifunctional protective device for oral clinical procedures. When wearing a protective face mask, the lower part of the mask adaptively conforms to the contours of the healthcare worker's chin and jaw, physically filling the gap between the mask and the face from below. This effectively blocks rising aerosols and contaminants while balancing comfort with minimal interference to the operator's field of vision and flexibility, thereby improving compliance and safety in clinical procedures.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a multifunctional protective device for oral clinical operations, comprising a face mask, a fixing strap and a support strap on the face mask, one end of the support strap being fixedly connected to the face mask; a tightening component for tightening the fixing strap and the support strap is provided between the fixing strap and the support strap and the face mask; a drive box is fixedly connected to the side wall of the face mask, and a drive component for tightening the fixing strap and the support strap is provided inside the drive box; an airbag is fixedly connected to the inner side wall of the face mask, and an inflation component for inflating the airbag to fit the chin is also provided inside the drive box; the drive component is also used to drive the inflation component to inflate the airbag.

[0007] The technical principles of the above solution are as follows:

[0008] When the mask is placed on the face, the drive assembly is activated simultaneously. This activates the tightening assembly, which in turn contracts the fixing and support straps, completing the initial positioning and basic fixation of the mask on the head. Simultaneously, the drive assembly simultaneously activates the inflation assembly, pumping air into the airbag fixed to the lower inner edge of the mask. The airbag expands evenly towards the healthcare worker's chin, gently and adaptively filling the irregularly shaped gaps that previously existed between the lower edge of the mask and the healthcare worker's chin and jawline, forming a physical barrier to block aerosols, droplets, and contaminants rising from the patient's mouth and entering the healthcare worker's breathing zone through the gaps below the mask.

[0009] The above approach has the following beneficial effects:

[0010] 1. This solution, through its integrated design, achieves simultaneous mask wearing and sealing. Only one drive component needs to be operated to tighten the straps to stabilize the mask while simultaneously inflating the airbag to adaptively seal the chin area. This simplifies the wearing and adjustment process, improving clinical efficiency and the immediacy of protection.

[0011] 2. This solution uses a flexible, expandable airbag as a sealing medium, which can actively adapt to the jaw and chin contours of different users to achieve a personalized close fit. This flexible contact avoids the pressure and discomfort caused by hard materials, improving the comfort of wearing and the tolerance for long-term work.

[0012] 3. This solution integrates the drive and inflation mechanism, and reduces external components through a linkage design. It has little impact on the frontal and lateral vision and head rotation flexibility of medical staff, and is less likely to interfere with commonly used equipment such as glasses and headlamps, thus ensuring the field of vision and flexibility of clinical operations, thereby improving the clinical acceptance and compliance of the protective device.

[0013] Furthermore, the tightening assembly includes side piston cylinders symmetrically fixedly connected to the side walls of the mask. Each side piston cylinder contains a side piston post that is slidably fitted inside. The end of each side piston post furthest from the side piston cylinder is fixedly connected to one end of its adjacent fixing strap. Each side piston cylinder contains a first tension spring. One end of each first tension spring is fixedly connected to the inner side wall of its adjacent side piston cylinder, and the other end of each first tension spring is fixedly connected to its adjacent side piston post.

[0014] A top piston cylinder is fixedly connected to the side wall of the fixing strap. A top piston column is slidably fitted inside the top piston cylinder. The end of the top piston column away from the top piston cylinder is fixedly connected to the end of the support strap away from the face mask. A second tension spring is provided inside the top piston cylinder. One end of the second tension spring is fixedly connected to the bottom wall inside the top piston cylinder, and the other end of the second tension spring is fixedly connected to the top piston column.

[0015] Beneficial effects: The side piston cylinder and top piston cylinder structure, through a single air path linkage control of the strap tightening, achieves synchronous and stable tightening force on both sides and the top, and can automatically compensate for the slight loosening of the strap caused by head movement, keeping the mask stable.

[0016] Furthermore, the drive assembly includes a controller and a first drive component fixedly connected to the inner side wall of the drive box. The controller controls the rotation of the output shaft of the first drive component. A piston cylinder is fixedly connected to the bottom wall of the drive box, and a piston is slidably fitted inside the piston cylinder. A threaded rod is coaxially fixedly connected to the output shaft of the first drive component. The end of the threaded rod away from the first drive component passes through the side wall of the piston cylinder and rotatably engages with the side wall of the piston cylinder. The piston has a threaded groove, which engages with the threaded rod. The piston divides the piston cylinder into a first chamber and a second chamber. Both the top piston cylinder and the side piston cylinder communicate with the first chamber.

[0017] Beneficial effects: The stepper motor drives the threaded rod and the piston in a coordinated manner, which converts the rotational motion into the linear displacement of the piston, thereby controlling the air pressure in the first chamber and realizing the linkage control of the tightening of the strap and the inflation of the airbag.

[0018] Furthermore, the inflation assembly includes a connecting tube, one end of which is connected to the second chamber, and the other end of which is connected to the airbag. A suction tube is also connected to one side of the connecting tube, and a one-way valve is connected inside the suction tube. A one-way valve is also connected inside the connecting tube, and a deflation nozzle is connected to the side wall of the airbag.

[0019] Beneficial effects: The connecting tube directly connects the second chamber to the airbag, and the airbag is directly inflated and deflated by the change in volume of the second chamber when the piston moves, without the need for an additional air pump, thus achieving simultaneous execution of strap fixation and airbag sealing.

[0020] Furthermore, both the support straps and the fixing straps are made of elastic nylon material.

[0021] Beneficial effects: The support and fixation straps are made of elastic material, which improves the comfort of securing the device.

[0022] Furthermore, a thin-film pressure sensor is fixedly connected to the inner wall of the fixing strap. The controller is also used to receive the pressure value of the fixing strap on the head sent by the thin-film pressure sensor, and control the output shaft of the first drive to stop rotating based on the pressure value.

[0023] Beneficial effects: The membrane pressure sensor monitors the pressure of the strap on the head in real time, and the controller controls the first drive component to stop accordingly, preventing discomfort caused by excessive tightness or instability caused by excessive looseness.

[0024] Furthermore, a defogging assembly for defogging the inside of the mask is provided on the inner wall of the mask. The defogging assembly includes a support bar fixedly connected to the inner wall of the mask, a plurality of nozzles fixedly connected to the bottom of the support bar, and an air supply assembly for pumping gas to the nozzles and a heating assembly for heating the gas pumped to the nozzles.

[0025] Beneficial effects: The defogging component delivers heated airflow to the inside of the mask, directly increasing the temperature of the transparent mask area and accelerating airflow, effectively preventing condensation and fogging of breath vapor from medical staff, and maintaining a clear surgical field of vision.

[0026] Furthermore, the air delivery assembly includes a second drive component fixedly connected to the inner wall of the drive box, and an air cylinder fixedly connected to the bottom wall of the drive box. The controller is also used to control the rotation of the output shaft of the second drive component; a wheel is coaxially fixedly connected to the output shaft of the second drive component. A piston slider is slidably fitted inside the air cylinder, and a piston connecting rod is fixedly connected to the piston slider. A crank is hinged to the end of the piston connecting rod away from the piston slider, and the end of the crank away from the piston connecting rod is eccentrically hinged to the side wall of the wheel. An air inlet pipe and an air outlet pipe are connected to the side wall of the air cylinder. Both the air inlet pipe and the air outlet pipe are connected to a one-way valve. The air inlet pipe is connected to the outside of the drive box, and the nozzles are connected to the air outlet pipe.

[0027] Beneficial effects: The crank-connecting rod mechanism converts the motor rotation into the reciprocating motion of the piston and slider, resulting in a compact structure that can generate airflow continuously and stably.

[0028] Furthermore, the heating assembly includes an electric heating wire fixedly connected to the bottom wall of the cylinder, and a controller is used to control the heating of the electric heating wire.

[0029] Beneficial effects: The heating wire is placed directly inside the air cylinder to heat the inhaled air. The controller can adjust the heating temperature to provide warm air at a suitable temperature, avoiding the risk of burns or discomfort to the wearer while defogging.

[0030] Furthermore, a sponge layer is fixedly connected to the side wall of the support strip.

[0031] Beneficial effects: The sponge layer on the support strip provides cushioning when the support strip is in contact with the patient's head, preventing the hard support strip from pressing on the head and causing discomfort. Attached Figure Description

[0032] Figure 1 This is a lateral axonometric view of the multifunctional protective device of the present invention for use in oral clinical operations.

[0033] Figure 2 This is a rear view of the multifunctional protective device of the present invention for use in oral clinical operations.

[0034] Figure 3This is an isometric view of the multifunctional protective device for oral clinical procedures according to the present invention.

[0035] Figure 4 This is a cross-sectional view of the side piston cylinder and the top piston cylinder in the multifunctional protective device for oral clinical operations of the present invention.

[0036] Figure 5 This is a front sectional view of the drive box in the multifunctional protective device for oral clinical operations of the present invention.

[0037] Figure 6 This is a side sectional view of the drive box in the multifunctional protective device for oral clinical operations of the present invention.

[0038] Figure 7 This is a frontal sectional view of the air cylinder in the multifunctional protective device for oral clinical operations of the present invention.

[0039] The reference numerals in the accompanying drawings of the instruction manual include: 1. Mask; 2. Fixing strap; 3. Support strap; 4. Drive box; 5. Airbag; 6. Side piston cylinder; 7. Side piston column; 8. Top piston cylinder; 9. Top piston column; 10. Stepper motor; 11. Piston cylinder; 12. DC motor; 13. Threaded rod; 14. First chamber; 15. Second chamber; 16. Connecting pipe; 17. Support bar; 18. Nozzle; 19. Wheel; 20. Crank; 21. Air cylinder; 22. Inlet pipe; 23. Outlet pipe; 24. One-way valve; 25. Heating wire; 26. Suction pipe; 27. One-way air valve. Detailed Implementation

[0040] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] The following detailed description illustrates the specific implementation method:

[0044] Example 1:

[0045] As attached Figure 1 As shown: A multifunctional protective device for oral clinical procedures includes a face mask 1, with a fixing strap 2 and a support strap 3 on the face mask 1. One end of the support strap 3 is fixedly sewn to the face mask 1. Tightening components are provided between the fixing strap 2 and the support strap 3 and the face mask 1 for tightening the fixing strap 2 and the support strap 3. Both the support strap 3 and the fixing strap 2 are made of elastic nylon material.

[0046] A drive box 4 is fixedly connected to the side wall of the mask 1 by screws. The drive box 4 contains a drive assembly for tightening the fixing strap 2 and the support strap 3. An airbag 5 is fixedly adhered to the inner side wall of the mask 1. The drive box 4 also contains an inflation assembly for inflating the airbag 5 to fit the chin. The drive assembly is also used to drive the inflation assembly to inflate the airbag 5.

[0047] Combination Figure 1 As shown, when the mask 1 is worn on the face, the drive component is activated simultaneously, which drives the tightening component to simultaneously contract the fixing strap 2 and the support strap 3, thus completing the initial positioning and basic fixation of the mask 1 on the head.

[0048] At the same time, the drive component synchronously drives the inflation component to pump air into the airbag 5 fixed on the lower inner edge of the mask 1. The airbag 5 expands evenly towards the chin of the medical staff, adaptively filling the irregular gap that originally existed between the lower edge of the mask 1 and the chin and jaw curve of the medical staff, forming a physical barrier to block aerosols, droplets and pollutants that rise from the direction of the patient's mouth and enter the breathing area of ​​the medical staff through the gap under the mask 1.

[0049] like Figure 4As shown, specifically, the tightening assembly includes side piston cylinders 6 symmetrically connected to the side wall of the mask 1 by screws. Each side piston cylinder 6 has a side piston post 7 slidably fitted inside it. The end of each side piston post 7 away from the side piston cylinder 6 is fixedly sewn to one end of its adjacent fixing strap 2. Each side piston cylinder 6 is equipped with a first tension spring. One end of each first tension spring is fixedly connected to the inner side wall of its adjacent side piston cylinder 6 by screws, and the other end of each first tension spring is fixedly connected to its adjacent side piston post 7 by screws.

[0050] A top piston cylinder 8 is fixedly connected to the side wall of the fixing strap 2 by screws. A top piston column 9 is slidably fitted inside the top piston cylinder 8. The end of the top piston column 9 away from the top piston cylinder 8 is fixedly sewn to the end of the supporting strap 3 away from the mask 1. A second tension spring is provided inside the top piston cylinder 8. One end of the second tension spring is fixedly connected to the bottom wall of the top piston cylinder 8 by screws, and the other end of the second tension spring is fixedly connected to the top piston column 9 by screws.

[0051] like Figure 5 As shown, specifically, the drive assembly includes a controller and a first drive component fixedly connected to the inner wall of the drive box 4 by screws. The controller is used to control the rotation of the output shaft of the first drive component. In this embodiment, the first drive component is a stepper motor 10. A piston cylinder 11 is fixedly connected to the bottom wall of the drive box 4 by screws. A piston is slidably fitted inside the piston cylinder 11. In this embodiment, a limit block is integrally formed on the piston, and a sliding groove is opened on the inner wall of the piston cylinder 11. The limit block slides within the sliding groove, so that the piston can only slide axially within the piston cylinder 11 and cannot rotate.

[0052] A threaded rod 13 is integrally formed on the output shaft of the stepper motor 10. The end of the threaded rod 13 away from the stepper motor 10 extends through the side wall of the piston cylinder 11 and into the piston cylinder 11, where it rotates and engages with the side wall of the piston cylinder 11. The piston has a threaded groove that engages with the threaded rod 13. The piston divides the piston cylinder 11 into a first chamber 14 and a second chamber 15. The top piston cylinder 8 and the side piston cylinder 6 are both connected to the first chamber 14 and are interconnected through the first chamber 14.

[0053] A thin-film pressure sensor is fixedly adhered to the inner wall of the fixing strap 2. The controller is used to receive the pressure value of the fixing strap 2 on the head sent by the thin-film pressure sensor, and control the output shaft of the stepper motor 10 to stop rotating based on the pressure value.

[0054] like Figure 5As shown, specifically, the inflation assembly includes a connecting pipe 16, one end of which is connected to the second chamber 15, and the other end of which is connected to the airbag 5. A suction pipe 26 is also connected to one side of the connecting pipe 16, and a one-way valve 27 is connected inside the suction pipe 26. The gas flow direction of the one-way valve 27 in the suction pipe 26 is from the outside into the suction pipe 26 and then into the second chamber 15. A one-way valve 27 is also connected inside the connecting pipe 16, and the gas flow direction of the one-way valve 27 in the connecting pipe 16 is from the second chamber 15 into the connecting pipe 16 and then into the airbag 5. A deflation nozzle is connected to the side wall of the airbag 5.

[0055] Combination Figure 1 and Figure 5 As shown, the controller is set with a pressure threshold. When the mask 1 is worn on the head, by pulling the fixing strap 2 and the support strap 3, the fixing strap 2 and the support strap 3 can respectively pull the side piston column 7 and the top piston column 9 out and pull the first tension spring and the second tension spring to stretch and deform. At this time, the mask 1 can be easily put on the head. At the same time, the support strap 3 can prevent the mask 1 from slipping down. At this time, the operator uses the controller to control the output shaft of the stepper motor 10 to rotate.

[0056] Combination Figure 4 and Figure 5 As shown, when the stepper motor 10 drives the threaded rod 13 to rotate in the forward direction, due to the threaded engagement between the piston and the threaded rod 13, the piston moves to the right. At this time, the space in the first chamber 14 on the left side of the piston increases, generating negative pressure. Since both the top piston cylinder 8 and the side piston cylinder 6 are connected to the first chamber 14, negative pressure is generated in both the top piston cylinder 8 and the side piston cylinder 6. Under the synchronous action of the negative pressure and the tightening force of the second tension spring, the top piston column 9 in the top piston cylinder 8 can move downward, causing the support strap 3 fixed thereto to tighten, thereby forming a stable support on the top of the head and preventing the mask 1 from falling. At the same time, the side piston column 7 in the side piston cylinder 6 can move to the left under the synchronous action of the negative pressure and the tightening force of the first tension spring, causing the fixing strap 2 to tighten, thereby forming a stable fixation on both sides of the head and ears, making the mask 1 more stable on the head.

[0057] When the controller receives a pressure value from the membrane pressure sensor on the fixing strap 2 that reaches a threshold, the controller controls the output shaft of the stepper motor 10 to stop rotating, thus preventing the fixing strap 2 from putting excessive pressure on the head. At the same time, through the linkage mechanism of the top piston cylinder 8 and the side piston cylinder 6, the mask 1 is automatically adjusted and securely fixed when subjected to external force.

[0058] Combination Figure 2As shown, for example, when the left side of the fixing strap 2 is pulled by an external force, the corresponding left side piston 7 slides in the side piston cylinder 6 and is interconnected through the first cavity 14, causing the right side piston 7 to displace, thereby automatically adjusting the overall fixing state of the mask 1, so that the mask 1 always remains stable and fixed. The airtight compression between the left side piston 7 and the inner wall of the left side piston cylinder 6 does not escape, forming a pneumatic buffer for the fixing strap 2, reducing the possibility of the mask 1 displacing due to the fixing strap 2 being pulled, and enhancing the safety of long-term wear.

[0059] Combination Figure 5 As shown, during the piston's movement to the right, the space within the second chamber 15 on the right side of the piston decreases, generating positive pressure. Since one end of the connecting pipe 16 is connected to the second chamber 15, and the other end of the connecting pipe 16 is connected to the airbag 5 (in this embodiment, the gas flow direction of the one-way valve 27 in the suction pipe 26 is from the outside to the suction pipe 26, and the gas flow direction of the one-way valve 27 in the connecting pipe 16 is from the second chamber 15 to the airbag 5), the positive pressure in the second chamber 15 can enter the airbag 5 through the one-way valve 27 from the connecting pipe 16, causing the airbag 5 to inflate. At the same time, the one-way valve 27 in the connecting pipe 16 can keep the gas inside the airbag 5, keeping the internal gas volume fixed and preventing the airbag 5 from collapsing. When the mask 1 is removed, the rubber plug of the vent on the side wall of the airbag 5 (not shown in the figure) is opened, and the gas inside the airbag 5 can be released for future use.

[0060] Combination Figure 2 and Figure 3 As shown, in this embodiment, the airbag 5 is made of medical-grade silicone, and a non-woven fabric lining is fixedly bonded to its inner surface (the side that fits against the skin) to improve wearing comfort. In this embodiment, the airbag 5 is approximately "pear-shaped," wider at the top and narrower at the bottom, thus better adapting to the transition area from the chin to the jawline. When the airbag 5 inflates, it can fill the contours of the mask 1 and the user's jaw and chin, blocking aerosols, droplets, and contaminants that rise from the patient's mouth and enter the respiratory area of ​​the medical staff through the gap below the mask 1.

[0061] Combination Figure 5 As shown, when it is necessary to remove the mask 1, the controller controls the output shaft of the stepper motor 10 to rotate in the opposite direction, which drives the piston to move to the left. The volume of the first chamber 14 decreases, generating positive pressure. This causes positive pressure to be generated in the top piston cylinder 8 and the side piston cylinder 6, which drives the top piston column 9 to extend upward, causing the support strap 3 to loosen its restraint on the top of the head. The side piston rod in the side piston cylinder 6 moves to the right, causing the fixing strap 2 to loosen its restraint on both sides of the head. At this time, the mask 1 can be removed.

[0062] At the same time, as the piston moves to the left, the volume of the second chamber 15 increases, generating negative pressure. Under the action of the one-way valve 27 in the suction pipe 26, external gas is drawn into the second chamber 15 from the suction pipe 26 and the connecting pipe 16, which facilitates the next inflation operation of the airbag 5.

[0063] In this design, the airbag 5's inflation mechanism allows for a personalized, close fit. The flexible contact between the airbag 5 and the face avoids the pressure and discomfort caused by hard materials, improving wearing comfort and endurance during extended use. Only one drive component is needed to tighten the fixing straps 2 and support straps 3 to stabilize the face mask 1, while the airbag 5 inflates to adaptively seal the chin area. This simplifies the wearing and adjustment process, improves clinical efficiency, and reduces external components through a linked design, minimizing impact on the frontal and lateral field of vision and head rotation flexibility of medical personnel. It also minimizes interference with commonly used equipment such as glasses and headlamps (which can be fixed to the support straps 3 via clips), ensuring a clear field of vision and flexibility during clinical operations, thereby improving the clinical acceptance and compliance of the protective device.

[0064] Example 2:

[0065] As attached Figure 3 As shown, the difference from Embodiment 1 is that a defogging assembly for defogging the inside of the mask 1 is provided on the inner wall of the mask 1. The defogging assembly includes a support strip 17 fixedly adhered to the inner wall of the mask 1, and a sponge layer fixedly adhered to the side wall of the support strip 17; a plurality of nozzles 18 are fixedly connected to the bottom of the support strip 17 by screws; the drive box 4 is provided with an air supply assembly for pumping gas to the nozzles 18 and a heating assembly for heating the gas pumped to the nozzles 18.

[0066] like Figure 5 and Figure 6 As shown, specifically, the air supply assembly includes a second drive unit fixedly connected to the inner side wall of the drive box 4 by screws, and an air cylinder 21 fixedly connected to the inner bottom wall of the drive box 4 by screws. The controller is also used to control the rotation of the output shaft of the second drive unit. A wheel 19 is coaxially fixedly connected to the output shaft of the second drive unit by screws. In this embodiment, the second drive unit is a DC motor 12.

[0067] A piston slider is slidably fitted inside the air cylinder 21. A piston connecting rod is integrally formed on the piston slider. A crank 20 is hinged to the end of the piston connecting rod away from the piston slider. The end of the crank 20 away from the piston connecting rod is eccentrically hinged to the side wall of the wheel 19. An inlet pipe 22 and an outlet pipe 23 are connected to the side wall of the air cylinder 21. Both the inlet pipe 22 and the outlet pipe 23 are connected to a one-way valve 24. The inlet pipe 22 is connected to the outside of the drive box 4. The nozzles 18 are connected to the outlet pipe 23. The gas flow direction of the one-way valve 24 in the inlet pipe 22 is from the outside to the inside of the air cylinder 21, and the gas flow direction of the one-way valve 24 in the outlet pipe 23 is from the inside of the air cylinder 21 to the nozzles 18.

[0068] like Figure 7 As shown, specifically, the heating assembly includes an electric heating wire 25 that is fixedly connected to the bottom wall of the air cylinder 21 by screws, and the controller is also used to control the heating wire 25 to generate heat.

[0069] Combination Figure 6 and Figure 7 As shown, during oral clinical procedures, the exhaled air of medical staff may cause fogging on the inside of the mask 1, affecting visibility. In this case, the controller can activate the defogging component. Specifically, the controller controls the output shaft of the DC motor 12 to rotate, driving the wheel 19 to rotate. The wheel 19, through the hinge of the crank 20 and the piston connecting rod, converts the rotational motion into the reciprocating linear motion of the piston slider within the air cylinder 21. When the piston slider moves upward, the space inside the air cylinder 21 increases, creating a negative pressure. Outside air is drawn into the air cylinder 21 through the one-way valve 24 in the air inlet pipe 22. When the piston slider moves downward, the space inside the air cylinder 21 decreases, creating a positive pressure. This positive pressure forces the air inside the air cylinder 21 through the one-way valve 24 in the air outlet pipe 23, spraying it downward from the nozzle 18 and towards the inner wall of the mask 1.

[0070] While the piston slider compresses the air, the controller controls the heating wire 25 at the bottom of the air cylinder 21 to heat the air drawn into the air cylinder 21. In this embodiment, the controller controls the heating wire 25 to maintain a constant heating temperature by controlling the heating wire 25 to pass a constant current, thereby avoiding overheating. The heated air is pumped through the air outlet pipe 23 to each nozzle 18 distributed on the upper inner edge of the mask 1.

[0071] Combination Figure 3As shown, the heated gas is ejected from nozzle 18 and blows directly onto the field of vision area on the inner wall of the mask 1, increasing the temperature of the mask 1 area and accelerating the airflow on its surface, thereby effectively preventing water vapor condensation and achieving the defogging function. Simultaneously, the airflow flows downwards along the inner side of the mask 1. The downward-flowing hot airflow is blocked by the airbag 5 at the bottom of the mask 1, thus flowing out from both sides of the mask 1. The continuous air supply makes the air pressure inside the mask 1 higher than the external ambient air pressure. The continuously discharged slightly positive pressure airflow can effectively block and disperse external pollutant aerosols and droplets that enter from the side gaps of the mask 1, further reducing the risk of cross-infection.

[0072] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A multifunctional protective device for oral clinical procedures, comprising a face mask (1), wherein the face mask (1) is provided with a fixing strap (2) and a supporting strap (3), characterized in that, One end of the support strap (3) is fixedly connected to the face mask (1); tightening components for tightening the fixed strap (2) and the support strap (3) are provided between the fixed strap (2) and the face mask (1); A drive box (4) is fixedly connected to the side wall of the mask (1). The drive box (4) is equipped with a drive assembly for tightening the fixing strap (2) and the support strap (3). An airbag (5) is fixedly connected to the inner side wall of the mask (1). The drive box (4) is also equipped with an inflation assembly for inflating the airbag (5) to fit the chin. The drive assembly is also used to drive the inflation assembly to inflate the airbag (5).

2. The multifunctional protective device for oral clinical operations according to claim 1, characterized in that, The tightening assembly includes side piston cylinders (6) symmetrically fixedly connected to the side wall of the mask (1). Each side piston cylinder (6) has a side piston column (7) slidably fitted inside. The end of the side piston column (7) away from the side piston cylinder (6) is fixedly connected to one end of its adjacent fixing strap (2). Each side piston cylinder (6) is provided with a first tension spring. One end of the first tension spring is fixedly connected to the inner side wall of its adjacent side piston cylinder (6), and the other end of the first tension spring is fixedly connected to its adjacent side piston column (7). A top piston cylinder (8) is fixedly connected to the side wall of the fixed strap (2). A top piston column (9) is slidably fitted inside the top piston cylinder (8). The end of the top piston column (9) away from the top piston cylinder (8) is fixedly connected to the end of the support strap (3) away from the mask (1). A second tension spring is provided inside the top piston cylinder (8). One end of the second tension spring is fixedly connected to the bottom wall inside the top piston cylinder (8), and the other end of the second tension spring is fixedly connected to the top piston column (9).

3. The multifunctional protective device for oral clinical operations according to claim 2, characterized in that, The drive assembly includes a controller and a first drive component fixedly connected to the inner wall of the drive box (4). The controller is used to control the rotation of the output shaft of the first drive component. A piston cylinder (11) is fixedly connected to the bottom wall of the drive box (4). A piston is slidably fitted inside the piston cylinder (11). A threaded rod (13) is coaxially fixedly connected to the output shaft of the first drive component. The end of the threaded rod (13) away from the first drive component passes through the side wall of the piston cylinder (11) and rotates with the side wall of the piston cylinder (11). The piston has a threaded groove, which is threaded to the threaded rod (13). The piston divides the piston cylinder (11) into a first chamber (14) and a second chamber (15). The top piston cylinder (8) and the side piston cylinder (6) are both connected to the first chamber (14).

4. The multifunctional protective device for oral clinical operations according to claim 3, characterized in that, The inflation assembly includes a connecting tube (16), one end of which is connected to the second chamber (15), and the other end of which is connected to the airbag (5). A suction tube (26) is also connected to one side of the connecting tube (16), and a one-way valve (27) is connected inside the suction tube (26). A one-way valve (27) is also connected inside the connecting tube (16), and a deflation nozzle is connected to the side wall of the airbag (5).

5. The multifunctional protective device for oral clinical operations according to claim 4, characterized in that, Both the support strap (3) and the fixing strap (2) are made of elastic nylon material.

6. The multifunctional protective device for oral clinical operations according to claim 5, characterized in that, A thin-film pressure sensor is fixedly connected to the inner wall of the fixing strap (2). The controller is also used to receive the pressure value of the fixing strap (2) on the head sent by the thin-film pressure sensor, and control the output shaft of the first drive to stop rotating based on the pressure value.

7. The multifunctional protective device for oral clinical operations according to claim 6, characterized in that, The inner wall of the mask (1) is provided with a defogging component for defogging the inside of the mask (1); The defogging assembly includes a support strip (17) fixedly connected to the inner wall of the mask (1), and a number of nozzles (18) fixedly connected to the bottom of the support strip (17). The drive box (4) is provided with an air supply assembly for pumping gas to the nozzles (18) and a heating assembly for heating the gas pumped to the nozzles (18).

8. The multifunctional protective device for oral clinical operations according to claim 7, characterized in that, The air supply assembly includes a second drive unit fixedly connected to the inner side wall of the drive box (4), and an air cylinder (21) fixedly connected to the inner bottom wall of the drive box (4). The controller is also used to control the rotation of the output shaft of the second drive unit. A wheel (19) is coaxially fixedly connected to the output shaft of the second drive unit. A piston slider is slidably fitted inside the air cylinder (21). A piston connecting rod is fixedly connected to the piston slider. A crank (20) is hinged to the end of the piston connecting rod away from the piston slider. The end of the crank (20) away from the piston connecting rod is eccentrically hinged to the side wall of the wheel (19). The air cylinder (21) has an air inlet pipe (22) and an air outlet pipe (23) connected to its side wall. Both the air inlet pipe (22) and the air outlet pipe (23) are connected to a one-way valve (24). The air inlet pipe (22) and the drive box (4) are connected to the outside. The nozzle (18) is connected to the air outlet pipe (23).

9. The multifunctional protective device for oral clinical operations according to claim 8, characterized in that, The heating assembly includes an electric heating wire (25) fixedly connected to the bottom wall of the air cylinder (21), and a controller is used to control the heating wire (25) to generate heat.

10. The multifunctional protective device for oral clinical operations according to claim 9, characterized in that, A sponge layer is fixedly connected to the side wall of the support strip (17).

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