Oral cavity observer with lens anti-fog function

Abstract

The invention provides an oral cavity observer with a lens anti-fog function, and relates to the technical field of oral cavity observators, the oral cavity observer comprises a handle shell, an air blowing assembly, a negative pressure assembly, a circuit board and an observation head assembly, the air blowing assembly, the negative pressure assembly and the circuit board are fixedly connected in the handle shell, one end of the air blowing assembly is connected and conducted with the observation head assembly, and the other end of the air blowing assembly is connected and conducted with the observation head assembly. One end of the negative pressure assembly is connected and conducted with the observation head assembly, the other end of the negative pressure assembly extends to the outside of the handle shell, the air blowing assembly, the negative pressure assembly and the observation head assembly are all electrically connected with the circuit board, and airflow blown out by the air blowing assembly towards the observation head assembly flows in the observation head assembly in a surrounding mode and then is pumped out through the negative pressure assembly. Water mist on the surface of the observation head assembly is eliminated; the oral cavity observation instrument with the lens anti-fog function can be used for demisting in a manner of blowing air to the glass lens, and can also be used for effectively blowing away saliva or sundries dropping to the glass lens, so that the shooting view field of a camera is prevented from being shielded by stains.

Description

Technical Field

[0001] The present invention relates to the technical field of oral cavity viewing instruments, and in particular to an oral cavity viewing instrument with an anti-fogging function for a lens. Background Art

[0002] In the dental department of the medical system, oral digital viewers are often used to observe the inside of a patient's oral cavity. However, due to the temperature difference between the external environment and the patient's oral cavity, some existing oral digital viewers are prone to fogging up the camera lens when the doctor inserts the oral digital viewer into the patient's mouth. This causes the captured image of the patient's oral cavity to be blurred, which has a relatively adverse effect on the doctor's observation and diagnosis.

[0003] Patent number CN219166366U is a digital oral viewer with anti-fog function. It uses a heating method to remove fog on the glass lens. If saliva or debris drips onto the glass lens, the glass lens needs to be wiped manually. If it is not wiped in time, the heating method will cause the saliva or debris to dehydrate and dry, eventually forming a pool of stains, affecting the field of view and clarity of the camera.

[0004] Therefore, it is necessary to propose an oral viewing instrument with a lens anti-fog function to defog the glass lens by blowing air, and at the same time, it can also effectively blow away saliva or debris dripping onto the glass lens to prevent stains from blocking the camera's shooting field of view. Summary of the Invention

[0005] In order to solve the above problems, the present invention proposes an oral viewing instrument with a lens anti-fog function to defog the glass lens by blowing air on it. At the same time, it can also effectively blow away saliva or debris dripping onto the glass lens to prevent stains from blocking the camera's shooting field of view.

[0006] The present invention is achieved through the following technical solutions:

[0007] The present invention proposes an oral observation instrument with a lens anti-fog function, including a handle shell, a blowing assembly, a negative pressure assembly, a circuit board, and an observation head assembly. The blowing assembly, the negative pressure assembly, and the circuit board are all fixedly connected to the handle shell, and the observation head assembly is fixedly connected to one end of the handle shell. One end of the blowing assembly is connected and conducted to the observation head assembly, and one end of the negative pressure assembly is connected and conducted to the observation head assembly. The other end of the negative pressure assembly extends to the outside of the handle shell. The blowing assembly, the negative pressure assembly, and the observation head assembly are all electrically connected to the circuit board. The airflow blown toward the observation head assembly by the blowing assembly flows around in the observation head assembly and is then extracted through the negative pressure assembly to eliminate water mist on the surface of the observation head assembly.

[0008] Furthermore, the observation head assembly includes a fixed seat assembly, a camera observation assembly, and a guide end cover. One end of the camera observation assembly is fixedly connected to one end of the fixed seat assembly and is centrally arranged. The camera observation assembly is electrically connected to the circuit board. A first air flow groove and a second air flow groove are provided in the fixed seat assembly. The first air flow groove faces the upper surface of the camera observation assembly, and the second air flow groove faces the lower surface of the camera observation assembly. One end of the blowing assembly is fixedly connected to the other end of the fixed seat assembly and is in communication with the first air flow groove. One end of the negative pressure assembly is fixedly connected to the other end of the fixed seat assembly and is in communication with the second air flow groove. The guide end cover forms a detachable connection with the fixed seat assembly and covers the camera observation assembly. The guide end cover is in communication with the first air flow groove and the second air flow groove. The guide end cover is provided with an opening, and the opening is aligned with the upper surface of the camera observation assembly.

[0009] Furthermore, the guide end cover covers the camera observation assembly to form a U-shaped airflow surround cavity, one end of the U-shaped airflow surround cavity is connected to the first airflow groove, and the other end of the U-shaped airflow surround cavity is connected to the second airflow groove.

[0010] Furthermore, a guide ramp is provided on the wall of the U-shaped airflow surrounding cavity, the guide ramp is close to the first airflow groove, and a wind guide surface is provided on the guide ramp, and the angle between the wind guide surface and the upper surface of the camera observation component is 10 to 12 degrees.

[0011] Furthermore, the fixed seat assembly is provided with an airflow connection end, and a first connection port and a second connection port are provided on one side of the airflow connection end. The first connection port is connected to the first airflow groove, and the second connection port is connected to the second airflow groove. One end of the blowing assembly is fixedly connected and connected to the first connection port, and one end of the negative pressure assembly is fixedly connected and connected to the second connection port.

[0012] Furthermore, the observation head assembly also includes a heating assembly, the fixed seat assembly is provided with an embedding groove, a portion of the heating assembly is accommodated in the embedding groove and fixedly connected to the fixed seat assembly, one end of the heating assembly extends into the first airflow groove, and the heating assembly is electrically connected to the circuit board.

[0013] Furthermore, the heating component includes a heating wire, a heat insulation plate, and a warning light. The two sides of the heat insulation plate are fixedly connected to the heating wire and the warning light respectively. The heating wire is accommodated in the first air flow groove. The heat insulation plate and the warning light are both accommodated in the embedded groove. The heating wire and the warning light are both electrically connected to the circuit board.

[0014] Furthermore, the blowing assembly includes a blowing hose and a first ducted fan, the first ducted fan is electrically connected to the circuit board, a first placement slot and a first ventilation slot are provided in the handle shell, the first placement slot is communicated with the first ventilation slot, the first ducted fan is accommodated in the first placement slot, one end of the blowing hose is connected and communicated with the air outlet of the first ducted fan, and the other end of the blowing hose extends out of the first placement slot and is connected and communicated with the observation head assembly.

[0015] Furthermore, the negative pressure component includes a negative pressure hose and a second ducted fan, the second ducted fan is electrically connected to the circuit board, a second placement slot and a second ventilation slot are provided in the handle shell, the second placement slot is connected to the second ventilation slot, the second ducted fan is accommodated in the second placement slot, one end of the negative pressure hose extends out of the second placement slot and is connected and connected to the observation head assembly, the other end of the negative pressure hose is provided with a Y-shaped connecting pipe, one end of the Y-shaped connecting pipe is connected and connected to the air outlet of the second ducted fan, and the other end of the Y-shaped connecting pipe extends out of the outside of the handle shell.

[0016] Furthermore, a control panel is provided on one side of the handle housing, and the control panel is electrically connected to the circuit board. The control panel is used to control the operation of the blowing assembly, the negative pressure assembly, and the observation head assembly.

[0017] Beneficial effects of the present invention:

[0018] The present invention adopts a handle shell as an integrally installed structure, and controls the blowing power of the blowing assembly and the negative pressure assembly through a circuit board. When the observation head assembly is in use, the blowing assembly is started and blows air toward the observation head assembly, and the airflow blown by the blowing assembly toward the observation head assembly flows around in the observation head assembly and is then extracted through the negative pressure assembly to eliminate water mist on the surface of the observation head assembly. Since the airflow flows inside the observation head assembly, the airflow blown out during defogger will not cause discomfort to the patient's oral cavity. At the same time, the blown airflow can also effectively blow away saliva or debris dripping onto the observation head assembly, killing two birds with one stone. In summary, the oral observation instrument with anti-fog function for the lens can defog by blowing air to the glass lens, and can also effectively blow away saliva or debris dripping onto the glass lens, thereby preventing stains from blocking the camera's shooting field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded view of the oral cavity viewing instrument with anti-fogging function for the lens of the present invention;

[0020] Figure 2 A cross-sectional view of the oral cavity viewing instrument with an anti-fog lens function according to the present invention;

[0021] Figure 3 This is an overall schematic diagram of the oral cavity viewing instrument with anti-fogging function for the lens of the present invention;

[0022] Figure 4 This is an exploded view of the observation head assembly of the oral observation instrument with anti-fogging function of the lens of the present invention;

[0023] Figure 5 A cross-sectional view of an observation head assembly of an oral viewing instrument with an anti-fog lens function according to the present invention;

[0024] Figure 6 for Figure 5 A partial enlarged schematic diagram of the label A;

[0025] Figure 7 This is an overall schematic diagram of the observation head assembly of the oral observation instrument with anti-fogging function of the lens of the present invention.

[0026] The reference numerals are as follows:

[0027] Handle housing 1, first placement slot 11, first ventilation slot 12, second placement slot 13, second ventilation slot 14, control panel 15, partition plate 16, second wire groove 161;

[0028] Blowing assembly 2, blowing hose 21, first ducted fan 22;

[0029] Negative pressure assembly 3, negative pressure hose 31, Y-shaped connecting pipe 311, second ducted fan 32;

[0030] Circuit board 4;

[0031] Observation head assembly 5, fixed seat assembly 51, first air flow groove 511, second air flow groove 512, air flow connection end 513, first connection port 5131, second connection port 5132, embedding groove 514, camera observation assembly 52, fixed frame 521, mounting groove 5211, first wire groove 5212, miniature camera 522, glass lens 523, guide end cover 53, opening 531, U-shaped air flow surround cavity 532, guide ramp 5321, air guide surface 53211, heating assembly 54, heating wire 541, heat insulation plate 542, warning light 543. DETAILED DESCRIPTION

[0032] In order to more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0033] Please refer to Figure 1-Figure 7The present invention proposes an oral observation instrument with a lens anti-fog function, including a handle shell 1, a blowing component 2, a negative pressure component 3, a circuit board 4, and an observation head component 5. The blowing component 2, the negative pressure component 3, and the circuit board 4 are all fixedly connected to the handle shell 1, and the observation head component 5 is fixedly connected to one end of the handle shell 1. One end of the blowing component 2 is connected and conductive to the observation head component 5, and one end of the negative pressure component 3 is connected and conductive to the observation head component 5. The other end of the negative pressure component 3 extends to the outside of the handle shell 1. The blowing component 2, the negative pressure component 3, and the observation head component 5 are all electrically connected to the circuit board 4. The airflow blown by the blowing component 2 toward the observation head component 5 flows around in the observation head component 5 and is then extracted through the negative pressure component 3 to eliminate water mist on the surface of the observation head component 5.

[0034] In this embodiment, the handle shell 1 is used as the integrally installed structure, the circuit board 4 is electrically connected to the external controller through a conductive wire to obtain working electricity, the external controller can play the image information obtained by the observation head assembly 5, and the blowing power of the blowing assembly 2 and the negative pressure assembly 3 is controlled by the circuit board 4. When the observation head assembly 5 is in use, the blowing assembly 2 is started and blows toward the observation head assembly 5, and the negative pressure assembly 3 is also started to exhaust the observation head assembly 5, and the airflow blown by the blowing assembly 2 toward the observation head assembly 5 enters the observation head assembly 5. After circulating, it is extracted through the negative pressure component 3. The direction of the entire airflow is to flow around the inner surface of the observation head component 5, so that the water mist on the surface of the observation head component 5 can be quickly eliminated. Since the airflow flows around inside the observation head component 5, the overflow of the airflow is small, and the airflow blown out during demisting will not cause discomfort to the patient's mouth. At the same time, the blown airflow can also effectively blow away saliva or debris dripping onto the observation head component 5 when it is wet, avoiding excessive residue of stains and removing the obstruction of the field of view of the observation head component 5, killing two birds with one stone.

[0035] In summary, the oral viewing device with anti-fog lens function can defog the glass lens by blowing air on it, and can also effectively blow away saliva or debris dripping onto the glass lens to prevent stains from blocking the camera's shooting.

[0036] In this embodiment, the observation head assembly 5 includes a fixed seat assembly 51, a camera observation assembly 52, and a guide end cover 53. One end of the camera observation assembly 52 is fixedly connected to one end of the fixed seat assembly 51 and is centrally arranged. The camera observation assembly 52 is electrically connected to the circuit board 4. The camera observation assembly 52 includes a fixed frame 521, a micro camera 522, and a glass lens 523. One end of the fixed frame 521 is fixedly connected to the fixed seat assembly 51. A mounting groove 5211 is provided in the fixed frame 521. The micro camera 522 is fixedly connected in the mounting groove 5211. The glass lens 523 is fixedly connected to the fixed frame 521 and blocks the mounting groove 5211. A first airflow groove 511 and a second airflow groove 512 are provided in the fixed seat assembly 51. The first airflow groove 511 faces the upper surface of the camera observation assembly 52, that is, the first airflow groove 511 faces the upper surface of the glass lens 523. The first airflow groove 511 is a groove for blowing out airflow, and the second airflow groove 512 faces The lower surface of the camera observation assembly 52, that is, the second air flow groove 512 faces the bottom of the fixed frame 521. The second air flow groove 512 is a groove for inhaling air flow. One end of the blowing assembly 2 is fixedly connected to the other end of the fixed seat assembly 51 and is connected to the first air flow groove 511. One end of the negative pressure assembly 3 is fixedly connected to the other end of the fixed seat assembly 51 and is connected to the second air flow groove 512. The guide end cover 53 forms a detachable connection with the fixed seat assembly 51 and covers the camera observation assembly 52. ​​The guide end cover 53 is connected with the first air flow groove 511 and the second air flow groove 512. The guide end cover 53 is provided with an opening 531, which is aligned with the upper surface of the camera observation assembly 52, and the opening 531 is connected to the outside; a first wire passing groove 5212 is provided in the fixed frame 521, and the first wire passing groove 5212 is connected to the mounting groove 5211. The conductive wire of the miniature camera 522 extends through the first wire passing groove 5212 to the handle shell 1 and is electrically connected to the circuit board 4;When the blowing component 2 is blowing, the air flows in from the first air flow groove 511 and then blows toward the upper surface of the camera observation component 52, that is, toward the glass lens 523, blowing away and volatilizing the water mist on the glass lens 523. Then, the air flow blowing through the glass lens 523 flows toward the second air flow groove 512 under the guidance of the inner wall of the guide end cover 53. Since the negative pressure component 3 is exhausting air, the air flow is extracted from the second air flow groove 512 to the outside. At this time, a surrounding air flow is formed on the surface of the camera observation component 52, and the setting of the opening 531 is to prevent the camera observation component 5 from 2 is blocked. When the airflow path is open 531, a small amount will overflow to the outside. However, due to the negative pressure of the second airflow groove 512, most of the airflow will still flow around the camera observation assembly 52. ​​Even if saliva or debris drips on the camera observation assembly 52, the airflow can blow the saliva or debris into the space between the camera observation assembly 52 and the guide end cover 53. If there is too much debris in this space and it affects the return wind speed, the guide end cover 53 can be removed, the debris cleared, and then the guide end cover 53 can be installed back on the fixing base assembly 51 for use. This is convenient and quick.

[0037] In this embodiment, the guide end cover 53 covers the camera observation component 52 to form a U-shaped airflow surround cavity 532, one end of the U-shaped airflow surround cavity 532 is connected to the first airflow groove 511, and the other end of the U-shaped airflow surround cavity 532 is connected to the second airflow groove 512; when the blowing component 2 blows air, the airflow enters the U-shaped airflow surround cavity 532 from the first airflow groove 511, and then flows around the observation component 52, blowing away the water mist on the upper surface of the observation component 52, and then being drawn out from the second airflow groove 512.

[0038] In this embodiment, a guide ramp 5321 is provided on the cavity wall of the U-shaped airflow surround cavity 532, and the guide ramp 5321 is close to the first airflow groove 511. A wind guide surface 53211 is provided on the guide ramp 5321, and the angle between the wind guide surface 53211 and the upper surface of the camera observation assembly 52 is 10 to 12 degrees; when the airflow enters the U-shaped airflow surround cavity 532 from the first airflow groove 511, in order to ensure that the airflow is blown directly toward the glass lens 523, the guide ramp 5321 is provided to guide the airflow, and the angle formed by the wind guide surface 53211 can guide the airflow to the glass lens 523 at an inclined angle, thereby reducing the overflow of the airflow from the opening 531 and improving the concentrated blowing effect of the airflow.

[0039] In this embodiment, the fixed seat assembly 51 is provided with an airflow connection end 513, and one side of the airflow connection end 513 is provided with a first connection port 5131 and a second connection port 5132. The first connection port 5131 is connected to the first airflow groove 511, and the second connection port 5132 is connected to the second airflow groove 512. One end of the blowing assembly 2 is fixedly connected and connected to the first connection port 5131, and one end of the negative pressure assembly 3 is fixedly connected and connected to the second connection port 5132; the setting of the first connection port 5131 and the second connection port 5132 facilitates the connection between the blowing assembly 2 and the negative pressure assembly 3, and also facilitates the installation of the observation head assembly 5 on the handle housing 1. When the blowing assembly 2 is blowing, the airflow is blown into the first airflow groove 511 from the first connection port 5131, and then flows around the camera observation assembly 52, enters the second connection port 5132 from the second airflow groove 512, and is then drawn out to the outside.

[0040] In this embodiment, the observation head assembly 5 also includes a heating assembly 54, the fixing seat assembly 51 is provided with an embedding groove 514, a portion of the heating assembly 54 is accommodated in the embedding groove 514 and is fixedly connected to the fixing seat assembly 51, one end of the heating assembly 54 extends into the first air flow groove 511, and the heating assembly 54 is electrically connected to the circuit board 4; the setting of the heating assembly 54 is to heat the blowing air flow to improve the volatilization efficiency of the water mist. When the camera observation assembly 52 is in operation, the blowing assembly 2 blows air and the heating assembly 54 is heated. The camera observation assembly 52 transmits the observed image back to the circuit board 4. The circuit board 4 can judge the volatilization of the water mist based on the image observed by the camera observation assembly 52. ​​If the water mist evaporates too slowly, the heating temperature of the heating assembly 54 is increased. For example, when the camera observation assembly 52 is acquiring images in the patient's mouth , the blowing component 2 and the negative pressure component 3 are both operating, and the surface of the glass lens 523 is fogged. At this time, the image obtained by the camera observation component 52 is blurred. The circuit board 4 will issue a first heating instruction to the heating component 54, and the heating component 54 will be heated to a first preset temperature, which is 2 to 4 degrees Celsius higher than the human oral temperature, so that the wind blown out from the first air flow slot 511 is heated to the first preset temperature. If the image obtained by the camera observation component 52 is still blurred within the preset time, the circuit board 4 will issue a second heating instruction to the heating component 54, and the heating component 54 will be heated to a second preset temperature, so that the wind blown out from the first air flow slot 511 is heated to a second preset temperature, which is higher than the first preset temperature, and the second preset temperature is 6 to 10 degrees Celsius higher than the first preset temperature, so as to accelerate the elimination of water mist on the glass lens 523.

[0041] In this embodiment, the heating component 54 includes a heating wire 541, a heat insulation plate 542, and a warning light 543. The two sides of the heat insulation plate 542 are fixedly connected to the heating wire 541 and the warning light 543 respectively. The heating wire 541 is accommodated in the first air flow groove 511, and the heat insulation plate 542 and the warning light 543 are both accommodated in the embedded groove 514. The heating wire 541 and the warning light 543 are both electrically connected to the circuit board 4; the heat insulation plate 542 is a ceramic heat insulation plate, which is used to block the heat of the heating wire 541 from being conducted to the warning light 543. When the heating component 54 is heating, the warning light 543 lights up to remind the user that the heating wire 541 is operating normally. When the heating wire 541 is not started, the warning light 543 is off.

[0042] In this embodiment, the blowing assembly 2 includes a blowing hose 21 and a first ducted fan 22. The first ducted fan 22 is electrically connected to the circuit board 4. A first placement slot 11 and a first ventilation slot 12 are provided in the handle shell 1. The first placement slot 11 is connected to the first ventilation slot 12. The first ducted fan 22 is accommodated in the first placement slot 11. One end of the blowing hose 21 is connected and connected to the air outlet of the first ducted fan 22. The other end of the blowing hose 21 extends out of the first placement slot 11 and is connected and connected to the observation head assembly 5. When the blowing assembly 2 is in operation, the first ducted fan 22 can deliver high-pressure airflow to the blowing hose 21, and the airflow blown out by the first ducted fan 22 can be obtained from the outside through the first ventilation slot 12. The high-pressure airflow can quickly blow away the water mist on the upper surface of the camera observation assembly 52, and can also directly and effectively blow away saliva or debris on the upper surface of the camera observation assembly 52 when it is wet, thereby avoiding excessive residue of stains on the glass lens 523.

[0043] In this embodiment, the negative pressure component 3 includes a negative pressure hose 31 and a second ducted fan 32. The second ducted fan 32 is electrically connected to the circuit board 4. A second placement slot 13 and a second ventilation slot 14 are provided in the handle housing 1. The second placement slot 13 is connected to the second ventilation slot 14. The second ducted fan 32 is accommodated in the second placement slot 13. One end of the negative pressure hose 31 extends out of the second placement slot 13 and is connected and connected to the observation head assembly 5. The other end of the negative pressure hose 31 is provided with a Y-type connecting pipe 311. The Y-type connecting pipe One end of 311 is connected to and communicated with the air outlet of the second ducted fan 32, and the other end of the Y-shaped connecting tube 311 extends out of the outside of the handle shell 1; when the negative pressure component 3 is operating, the second ducted fan 32 can blow high-pressure airflow to the Y-shaped connecting tube 311, so that negative pressure is generated inside the Y-shaped connecting tube 311 under the action of the high-pressure airflow, and the negative pressure causes the negative pressure hose 31 to suck the airflow inside the observation head assembly 5, and the airflow blown out by the second ducted fan 32 can be obtained from the outside through the second ventilation groove 14.

[0044] In this embodiment, a partition plate 16 is provided in the handle housing 1, and the partition plate 16 is located between the first placement groove 11 and the second placement groove 13. A second wire groove 161 is provided in the partition plate 16, and the second wire groove 161 is used to provide a routing channel for the conductive wires of the observation head assembly 5, so as to facilitate the electrical connection between the observation head assembly 5 and the circuit board 4.

[0045] In this embodiment, a control panel 15 is provided on one side of the handle housing 1, and the control panel 15 is electrically connected to the circuit board 4. The control panel 15 is used to control the operation of the blowing component 2, the negative pressure component 3, and the observation head component 5; a data processing module, a first drive module, a second drive module, a third drive module, a command input module, an image recognition module, and a data transmission module are provided on the circuit board 4. The data processing module is electrically connected to the first drive module, the second drive module, the third drive module, the command input module, the image recognition module, and the data transmission module respectively. The first drive module is electrically connected to the blowing component 2, and the first drive module is used to issue corresponding operating instructions to the blowing component 2, the second drive module is electrically connected to the negative pressure component 3, and the second drive module is used to issue corresponding operating instructions to the negative pressure component 3, and the third drive module is electrically connected to the heating component 4. The third driving module is used to issue corresponding operating instructions to the heating component 4. The instruction input module is electrically connected to the control panel 15. The instruction input module is used to receive instructions from the control panel 15 and transmit them back to the data processing module. The image recognition module is electrically connected to the micro camera 522. The image recognition module is used to receive image information from the micro camera 522 and transmit it back to the data processing module. The data transmission module is electrically connected to the image recognition module and the external controller respectively. The data transmission module is used to transmit the image information of the image recognition module to the external controller so that the external controller can play the image of the micro camera 522. The data processing module is used to issue corresponding operating instructions to the first driving module, the second driving module, and the third driving module according to the information returned by the instruction input module and the information returned by the image recognition module.

[0046] Of course, the present invention may have many other implementations. Based on this implementation, other implementations obtained by ordinary technicians in this field without any creative work are all within the scope of protection of the present invention.

Claims

1. An oral cavity viewing instrument with anti-fog lens function, characterized in that: It includes a handle shell, a blowing assembly, a negative pressure assembly, a circuit board, and an observation head assembly. The blowing assembly, the negative pressure assembly, and the circuit board are all fixedly connected in the handle shell. The observation head assembly is fixedly connected to one end of the handle shell. One end of the blowing assembly is connected and conducted with the observation head assembly. One end of the negative pressure assembly is connected and conducted with the observation head assembly. The other end of the negative pressure assembly extends to the outside of the handle shell. The blowing assembly, the negative pressure assembly, and the observation head assembly are all electrically connected to the circuit board. The airflow blown out by the blowing assembly toward the observation head assembly flows around in the observation head assembly and is then extracted through the negative pressure assembly to eliminate water mist on the surface of the observation head assembly.

2. The oral cavity viewing instrument with anti-fog lens function according to claim 1, characterized in that: The observation head assembly includes a fixed seat assembly, a camera observation assembly, and a guide end cover. One end of the camera observation assembly is fixedly connected to one end of the fixed seat assembly and is centrally arranged. The camera observation assembly is electrically connected to the circuit board. A first air flow groove and a second air flow groove are provided in the fixed seat assembly. The first air flow groove faces the upper surface of the camera observation assembly, and the second air flow groove faces the lower surface of the camera observation assembly. One end of the blowing assembly is fixedly connected to the other end of the fixed seat assembly and is in communication with the first air flow groove. One end of the negative pressure assembly is fixedly connected to the other end of the fixed seat assembly and is in communication with the second air flow groove. The guide end cover forms a detachable connection with the fixed seat assembly and covers the camera observation assembly. The guide end cover is in communication with the first air flow groove and the second air flow groove. The guide end cover is provided with an opening, and the opening is aligned with the upper surface of the camera observation assembly.

3. The oral cavity viewing instrument with anti-fog lens function according to claim 2, characterized in that: The guide end cover covers the camera observation assembly to form a U-shaped airflow surround cavity, one end of the U-shaped airflow surround cavity is connected to the first airflow groove, and the other end of the U-shaped airflow surround cavity is connected to the second airflow groove.

4. The oral cavity viewing instrument with anti-fog lens function according to claim 3, characterized in that: The wall of the U-shaped airflow surrounding cavity is provided with a guide ramp, which is close to the first airflow groove. The guide ramp is provided with a wind guide surface, and the angle between the wind guide surface and the upper surface of the camera observation component is 10 to 12 degrees.

5. The oral cavity viewing instrument with anti-fog lens function according to claim 2, characterized in that: The fixed seat assembly is provided with an airflow connection end, and a first connection port and a second connection port are provided on one side of the airflow connection end. The first connection port is connected to the first airflow groove, and the second connection port is connected to the second airflow groove. One end of the blowing assembly is fixedly connected and connected to the first connection port, and one end of the negative pressure assembly is fixedly connected and connected to the second connection port.

6. The oral cavity viewing instrument with anti-fog lens function according to claim 2, characterized in that: The observation head assembly also includes a heating assembly, the fixing seat assembly is provided with an embedding groove, a portion of the heating assembly is accommodated in the embedding groove and fixedly connected to the fixing seat assembly, one end of the heating assembly extends into the first airflow groove, and the heating assembly is electrically connected to the circuit board.

7. The oral cavity viewing instrument with anti-fog lens function according to claim 6, characterized in that: The heating component includes a heating wire, a heat insulation plate, and a warning light. The two sides of the heat insulation plate are fixedly connected to the heating wire and the warning light respectively. The heating wire is accommodated in the first air flow groove. The heat insulation plate and the warning light are both accommodated in the embedded groove. The heating wire and the warning light are both electrically connected to the circuit board.

8. The oral cavity viewing instrument with anti-fog lens function according to claim 1, characterized in that: The blowing assembly includes an air blowing hose and a first ducted fan, the first ducted fan is electrically connected to the circuit board, a first placement slot and a first ventilation slot are provided in the handle shell, the first placement slot is communicated with the first ventilation slot, the first ducted fan is accommodated in the first placement slot, one end of the air blowing hose is connected and communicated with the air outlet of the first ducted fan, and the other end of the air blowing hose extends out of the first placement slot and is connected and communicated with the observation head assembly.

9. The oral cavity viewing instrument with anti-fog lens function according to claim 1, characterized in that: The negative pressure assembly includes a negative pressure hose and a second ducted fan, which is electrically connected to the circuit board. A second placement slot and a second ventilation slot are provided in the handle shell, and the second placement slot is connected to the second ventilation slot. The second ducted fan is accommodated in the second placement slot. One end of the negative pressure hose extends out of the second placement slot and is connected and connected to the observation head assembly. The other end of the negative pressure hose is provided with a Y-shaped connecting pipe, one end of the Y-shaped connecting pipe is connected and connected to the air outlet of the second ducted fan, and the other end of the Y-shaped connecting pipe extends out of the handle shell.

10. The oral cavity viewing instrument with anti-fog lens function according to claim 1, characterized in that: A control panel is provided on one side of the handle housing. The control panel is electrically connected to the circuit board and is used to control the operation of the blowing assembly, the negative pressure assembly, and the observation head assembly.

Images