CN111481746A

CN111481746A - Detecting instrument

Info

Publication number: CN111481746A
Application number: CN201910075979.1A
Authority: CN
Inventors: 刘文平; 赵优
Original assignee: Shenzhen Changsite Technology Co ltd
Current assignee: Shenzhen Changsite Technology Co ltd
Priority date: 2019-01-26
Filing date: 2019-01-26
Publication date: 2020-08-04

Abstract

The invention relates to the technical field of detection instruments, in particular to a detector which comprises a main shell and a detection head connected to one end of the main shell, wherein a negative pressure generating device is arranged in the main shell; an accommodating cavity is formed between the detection head and the main shell, and the negative pressure generating device is communicated with the accommodating cavity; the detection head is provided with an opening communicated with the accommodating cavity; one end of the main shell close to the detection head is connected with a camera which is positioned in the accommodating cavity and is used for shooting a scene at the opening; the negative pressure generating device generates negative pressure, so that the containing cavity is under negative pressure, and suction is generated at the opening, so that foreign matters are adsorbed; the detector rethread wired or wireless mode is connected with external display, and the picture that the camera was shot is shown through the display to make the process and the effect of getting rid of the foreign matter visible at any time, the user no longer blindly operates, avoids the pain that the misoperation brought for the human body.

Description

Detecting instrument

Technical Field

The invention relates to the technical field of detection instruments, in particular to a detector.

Background

There are some foreign matters to be removed, such as blackheads, pimples, greasy dirt, ear canal secretions or nasal secretions, etc. on the human body.

The above-mentioned foreign matter is generally removed by hand, for example, by applying a tear-off mask or removing blackheads with a needle, removing secretions from the ear canal by hand with an earpick, or removing secretions from the nasal cavity with a cotton swab.

The mode of manually removing the foreign matters is adopted, so that the operation is complicated and inconvenient. And the process of removing the foreign matters is invisible and can only be operated blindly. When the operation is improper (such as blind digging of ear canal secretion), pain can be brought to the human body, and even further lesion can be brought.

Disclosure of Invention

The invention mainly aims to provide a detector capable of removing foreign matters and being visible in the process of removing the foreign matters.

In order to achieve the technical problem, the invention provides a detector which comprises a main shell and a detection head connected to one end of the main shell, wherein a negative pressure generating device is arranged in the main shell; an accommodating cavity is formed between the detection head and the main shell, and the negative pressure generating device is communicated with the accommodating cavity;

the detection head is provided with an opening communicated with the accommodating cavity; the main casing body is close to one of detection head is served and is connected with the camera, the camera is located accept the intracavity, the camera is used for shooting the scene of opening part.

The detector provided by the invention is provided with the negative pressure generating device, the negative pressure generating device is communicated with the accommodating cavity, and the negative pressure generating device generates negative pressure, so that the negative pressure is generated in the accommodating cavity, and further, the suction force is generated at the opening, and the foreign matters are adsorbed. The detector provided by the invention is also provided with a camera in the accommodating cavity for shooting a scene at the opening. The detector rethread wired or wireless mode is connected with external display, and the picture that the camera was shot is shown through the display to make the process and the effect of getting rid of the foreign matter visible at any time, the user no longer blindly operates, avoids the pain that the misoperation brought for the human body.

Further, the mounting piece is positioned in the accommodating cavity and comprises a fixed chassis and a protective column shell connected to the fixed chassis; the fixed chassis is connected with one end, close to the detection head, of the main shell, and the protection column shell is sleeved on the camera.

Furthermore, one end of the main shell close to the detection head is provided with an installation end face, and an installation side wall protruding out of the surface of the installation end face is arranged on the installation end face; the fixed chassis is connected with one end of the mounting side wall far away from the mounting end face in a sealing manner, and a closed air cavity is formed among the mounting end face, the mounting side wall and the fixed chassis; the mounting end face is provided with an air hole for communicating the negative pressure generating device and the air cavity, and the fixed chassis is provided with an air vent for communicating the air cavity and the accommodating cavity; the protective column shell is arranged at one end, far away from the installation side wall, of the fixing chassis, and the camera is fixedly connected onto the installation end face and penetrates through the fixing chassis to extend into the protective column shell.

Furthermore, a plurality of air vents are formed in the fixed chassis and are uniformly arranged on the fixed chassis at intervals along the circumferential direction of the protective column shell.

Furthermore, the mounting end face is provided with a mounting column protruding towards one side of the fixed chassis, and a mounting through hole is formed in the mounting column; the installation end face is provided with a communicating hole communicated with the installation through hole, and the inner space of the main shell is communicated with the containing cavity through the communicating hole and the installation through hole.

Furthermore, a second sealing ring is connected to the side edge of the fixed chassis, and the second sealing ring is in interference fit with the inner surface of the installation side wall and is detachably connected with the inner surface of the installation side wall.

Further, the negative pressure generating device is a suction pump; a first mounting position and a second mounting position are arranged in the main shell, and the first mounting position is farther away from the detection head relative to the second mounting position; the air suction pump is arranged in the first installation position and is connected with the air hole through a vent pipe; the second installation position is provided with a circuit board, the circuit board is provided with a control circuit, and the air pump and the camera are respectively and electrically connected with the control circuit.

Furthermore, the camera comprises a lens, and the lens faces the direction of the opening and is arranged right opposite to the opening.

Furthermore, at least one lighting light-emitting diode is arranged in the accommodating cavity.

Further, the wireless control device also comprises a Wi-Fi module which is electrically connected with the control circuit.

Drawings

The advantages of the above and/or additional aspects of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of one embodiment of a detector provided in accordance with the present invention;

FIG. 2 is an exploded view of the detector shown in FIG. 1;

FIG. 3 is an enlarged view of area A of FIG. 2;

figure 4 is a schematic view from another perspective of the suction head shown in figure 2;

FIG. 5 is a perspective view of another embodiment of a suction head provided in accordance with the present invention;

FIG. 6 is a perspective view of one embodiment of an otoscope lens provided by the present invention;

FIG. 7 is a perspective view of one embodiment of a nasal lens provided by the present invention;

FIG. 8 is a schematic view of another perspective of the rear housing shown in FIG. 2;

fig. 9 is an assembly schematic view of the camera and the fixing base shown in fig. 2;

FIG. 10 is a schematic view of another perspective of the mount shown in FIG. 3;

FIG. 11 is a schematic view of the anchor block shown in FIG. 3 from another perspective;

fig. 12 is an assembly diagram of an optical carrier and a camera according to an embodiment of the inspection apparatus provided in the present invention;

FIG. 13 is a schematic view of an assembly of an illumination LED and a mounting base of another embodiment of the detector of the present invention;

FIG. 14 is a schematic view of the mounting slot and the through hole formed in the mounting base plate shown in FIG. 13;

FIG. 15 is a rear elevational view of the anchor block illustrated in FIG. 3;

wherein the correspondence between the reference numbers and the names of the components in fig. 1 to 15 is:

1. a main housing, 2, a suction head, 3, an opening, 4, a first sealing ring, 5, a suction pump, 6, a suction hole, 7, an air outlet hole, 8, a vent pipe, 9, a circuit board, 10, a camera, 11, a Wi-Fi module, 12, a second sealing ring, 13, a mounting post, 14, a mounting through hole, 15, a mounting piece, 16, a fixing chassis, 17, a protective post shell, 18, a vent hole, 19, an air hole, 20, a mounting side wall, 21, a fixing groove, 22, a clamping edge, 23, a battery, 24, a charging data transmission interface, 25, a cosmetic mirror, 26, a front shell, 27, a rear shell, 28, a start key, 29, an increase key, 30, a decrease key, 31, a mounting end face, 33, a fixing seat, 34, a first mounting position, 35, a second mounting position, 36, a light carrier plate, 37, a lighting light emitting diode, 38, a jack, 39, a mounting groove, 40, a through hole, 41, an ear lens, 42. nasal lens, 43, lens, 44, communication hole.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Referring to fig. 1, an embodiment of a testing apparatus provided by the present invention includes a main housing 1 and a testing head connected to one end of the main housing 1, wherein a negative pressure generating device is disposed in the main housing 1.

Referring to fig. 2 and 3, a receiving cavity is formed between the detection head and the main housing 1, the negative pressure generating device is communicated with the receiving cavity, and the negative pressure generating device generates negative pressure in the receiving cavity to generate suction force, so that the suction force can be used for sucking blackheads, pimples, oil stains and the like. The detection head is provided with an opening 3 communicated with the accommodating cavity. One end of the main casing body 1 close to the detection head is connected with a camera 10, the camera 10 is located in the accommodating cavity, and the camera 10 is used for shooting a scene at the opening 3. Because camera 10 is located the inside of acceping the chamber, the scene of shooting and acceping opening 3 department that the chamber is linked together is more clear, and then makes the visual effect of the process of detector absorption foreign matter better. And no other objects are arranged between the camera 10 and the opening 3, so that the camera shooting effect is clearer.

Referring to fig. 4 to 7, the detecting head is the suction head 2, the otoscope 41 or the rhinoscope 42. When the test head is a suction head 2 for sucking blackheads or pimples, etc., the opening 3 is for contacting the skin, and the sucked blackheads or pimples, etc. are attached to the edge of the opening 3. The detection heads with different sizes and shapes of the openings 3 can be designed according to the requirements of suction and use positions. For example: the opening 3 is a large circular hole or a small circular hole, and the opening 3 is an elliptical detection head, and the like, and is not limited herein.

The opening 3 can be additionally provided with a microcrystalline grinding head to play a role in removing cutin, preventing pore blockage and improving skin.

Referring to fig. 6, when the detecting head is an ear lens 41, it is inserted into the ear canal to observe the internal structure of the ear canal. The negative pressure generating device is started to work, so that the detector generates suction force, and secretion or foreign matters in the auditory canal can be adsorbed. Specifically, the front end of the ear lens 41 is shaped to correspond to the ear canal so that the front end of the ear lens 41 can be inserted into the ear canal.

Referring to fig. 7, when the detecting head is a nose lens 42, it is inserted into the nasal cavity for observing and detecting the nasal cavity. The negative pressure generating device is started to work, so that the detector generates suction, and secretion or foreign matters adsorbed in the nasal cavity can be cleaned. Specifically, the front end of the nasal lens 42 is shaped to correspond to the nostril such that the front end of the nasal lens 42 can be inserted into the nasal cavity.

Detect between head and the main casing body 1 sealing connection, prevent gas leakage, play better adsorption effect.

Referring to fig. 4 and 5, the detection head is detachably connected to the main housing 1, so that the detection head can be replaced easily. Optionally, one of the main casing body 1 is provided with a first seal ring 4, and the detection head is sleeved on one end of the main casing body 1 and is in interference fit with the first seal ring 4, so that the sealing function can be achieved, and the detachable connection can be realized. And the first sealing ring 4 is made of elastic soft material, and is not easy to damage after being mounted and dismounted for many times, and is durable.

Referring to fig. 2 and 8, a first mounting position 34 and a second mounting position 35 are disposed in the main housing 1, and the first mounting position 34 is farther away from the detection head relative to the second mounting position 35.

In this embodiment, the negative pressure generating device is a suction pump 5, and the suction pump 5 is disposed in the first mounting location 34 and connected to the air hole 19 through the air pipe 8. Specifically, the air pump 5 includes an air suction hole 6 and an air outlet hole 7, and the air pump 5 sucks air through the air suction hole 6 and discharges the sucked air out of the air pump 5 through the air outlet hole 7.

The air suction hole 6 of the air suction pump 5 is connected with the air hole 19 through the air pipe 8. The air pump 5 works, and air is pumped out of the accommodating cavity through the vent pipe 8, so that the air pressure in the accommodating cavity is lower than the air pressure outside the detection head, namely, the air pressure is negative pressure, suction is generated, and the effect of adsorbing foreign matters is achieved.

The suction pump 5 includes a motor. Because first installation position 34 is kept away from the detection head, and then aspiration pump 5 also keeps away from the detection head, avoid the motor work of aspiration pump 5 and disturb camera 10 to influence the formation of image effect of camera 10.

And because aspiration pump 5 is located the position far away from detecting the head to make the gas circuit extension of bleeding and giving vent to anger, the gas circuit is more smooth and easy, avoids causing because of the gas circuit is not smooth and easy that adsorption effect weakens or can not play absorbent effect.

A circuit board 9 is arranged in the second mounting position 35, a control circuit is arranged on the circuit board 9, and the air extracting pump 5 is electrically connected with the control circuit. The control circuit controls the work of the air pump 5 and controls the air pumping quantity of the air pump 5, so that the size of suction force is controlled, and the requirements of a user on different suction forces are met by setting the detector with adjustable suction force. Specifically, main casing 1 is last still to be equipped with at least one button, and every button all is connected with control circuit electricity to through the work of button control circuit, thereby control detector work.

Because second installation position 35 is located the position nearer from detecting head 3, and then circuit board 9 just also is located the position nearer from detecting head 3, and then makes the button all be located the position nearer from detecting head 3. When the detector is used, the main shell 1 is held by hand to be away from the detection head (namely the bottom of the main shell 1), and the key is positioned above (and at a position close to the detection head), so that the operation is convenient, and the key is prevented from being touched by mistake by the hand-held part.

In this embodiment, the main housing 1 is provided with three keys, namely a start key 28, an increase key 29 and a decrease key 30, and the start key 28, the increase key 29 and the decrease key 30 are all electrically connected with the control circuit. The starting key 28 controls the operation and the stop of the air suction pump 5, thereby controlling the starting and the stopping of the adsorption function of the detector. The size of the air suction quantity of the air suction pump 5 is controlled through the size adjusting key 29 and the size adjusting key 30, so that the size of the suction force of the detector is controlled.

In other embodiments, the main housing 1 is provided with a touch panel, the touch panel is electrically connected to the control circuit, and the operation and the suction force of the air pump 5 are controlled by the touch panel. The touch panel also displays information such as the working state and the suction force of the air pump 5.

The camera 10 comprises a lens 43, the lens 43 is arranged towards the direction of the opening 3 and is arranged right opposite to the opening 3, the shooting distance is short, the structural length can be saved, the whole volume of the detector is reduced, the detector is smaller and lighter, and the picture can be shot more clearly.

Specifically, the distance between the camera 10 and the opening 3 is 1-1.8 cm, and the shot picture is clear.

The camera 10 is also electrically connected to the control circuit, and the picture taken by the camera 10 is transmitted to the control circuit.

Referring to FIG. 2, the monitor further includes a Wi-Fi module 11, and the Wi-Fi module 11 is also electrically connected to the control circuit. The control circuit is in wireless connection with the mobile communication terminal through the Wi-Fi module 11, and the control circuit transmits the pictures shot by the camera 10 to software of the mobile communication terminal through the Wi-Fi module 11 in a wireless mode to be played synchronously, so that a user can see the process and effect of adsorbing and removing foreign matters at any time. Specifically, the Wi-Fi module 11 is provided on the circuit board 9.

Referring to fig. 3, 9 and 15, specifically, an end of the main housing 1 close to the detection head is provided with a mounting end surface 31, the mounting end surface 31 is provided with a raised mounting post 13, a through mounting through hole 14 is formed in the mounting post 13, and a communication hole 44 communicated with the mounting through hole 14 is formed in the mounting through hole 14. The inner space of the main casing 1 communicates with the receiving chamber through the communication hole 44 and the mounting through hole 14. The mounting through hole 14 faces the opening 3 and is arranged coaxially with the opening 3, and the camera 10 is mounted in the mounting through hole 14 and is electrically connected to the control circuit through the communication hole 44.

Referring to fig. 3 and 10, the detecting apparatus further includes a mounting member 15 located in the receiving cavity, and the mounting member 15 includes a fixed chassis 16 and a protective column casing 17 connected to the fixed chassis 16. The fixed chassis 16 is connected with one end of the main casing 1 close to the detection head, and the fixed chassis 16 can be connected with the main casing 1 through interference fit, snap connection or screw connection and the like.

The protective column shell 17 is sleeved on the camera 10 to protect the camera 10 and prevent foreign objects from scraping the camera 10 when the detection head is detached. Specifically, the protective column casing 17 is perpendicular to the fixed chassis 16, the protective column casing 17 is in a hollow cylindrical shape, the fixed chassis 16 is in a circular shape, and one end of the protective column casing 17 away from the fixed chassis 16 is level with or slightly higher than the lens of the lens 43 of the camera 10.

Referring to fig. 11, the mounting end face 31 is further provided with a mounting sidewall 20 protruding from the surface of the mounting end face 31, the fixed chassis 16 is hermetically connected to one end of the mounting sidewall 20 away from the mounting end face 31, a closed air cavity is formed between the mounting end face 31, the mounting sidewall 20 and the fixed chassis 16, the mounting end face 31 is provided with an air hole 19 communicating the negative pressure generating device and the air cavity, and the fixed chassis 16 is provided with an air vent 18 communicating the air cavity and the accommodating cavity. The protective column shell 17 is arranged at one end of the fixed chassis 16 far away from the installation side wall 20, and the camera 10 is connected and fixed on the installation end surface 31 and penetrates through the fixed chassis 16 to extend into the protective column shell 17.

The air cavity is also provided with filter cotton for filtering impurities and preventing the absorbed impurities such as blackheads or grease from entering the main shell 1 through the air hole 19.

Optionally, the fixed chassis 16 is provided with a plurality of air vents 18 to make the air flow more uniform, and further make the suction at the opening 3 more uniform and comfortable to use. Moreover, the air distribution flow is realized through the mode, compared with the mode of arranging the plurality of vent pipes 8, the air distribution flow is simpler in structure and small in structure volume, and the air passage is not smooth due to the fact that the vent pipes 8 are tangled. Specifically, a plurality of air vents 18 are provided around the protective column case 17, and a plurality of air vents 18 are provided on the fixed chassis 16 at uniform intervals in the circumferential direction of the protective column case 17.

In the present embodiment, the plurality of air vents 18 are all circular.

In other embodiments, the plurality of vents 18 are long arcs, increasing airflow.

A fixing groove 21 is formed in the side edge of the fixing base plate 16, and a second sealing ring 12 is fixed in the fixing groove 21. The side edge of the fixed chassis 16 is inserted into the installation side wall 20, the second sealing ring 12 is in interference fit with the inner surface of the installation side wall 20, the second sealing ring 12 not only increases the sealing performance of the fixed chassis 16 and the installation side wall 20, but also enables the fixed chassis 16 to be detachably connected with the installation side wall 20, and the installation and the disassembly are convenient, and the cleaning and the replacement are convenient.

The side edge of the fixed chassis 16 is further provided with a clamping edge 22, and the clamping edge 22 is used for clamping one end of the mounting side wall 20 opposite to the mounting end face 31, so that a gap is left between the fixed chassis 16 and the mounting end face 31 to form an air cavity, and the fixed chassis 16 is prevented from contacting with the mounting end face 31 to block the air hole 19.

The mounting post 13 on the mounting end face 31 projects toward one side of the fixed chassis 16.

Referring to fig. 12, at least one light emitting diode 37 is disposed in the accommodating cavity. The at least one illumination led 37 is electrically connected to a control circuit for controlling the operating state of the illumination led 37. The illuminating light emitting diode 37 is used for illuminating the accommodating cavity and the opening 3, and is beneficial to clear pictures shot by the camera 10. Optionally, the illuminating led 37 emits white light or yellow light, and the illumination effect is good.

Specifically, the detecting apparatus further includes a light carrier plate 36, the light carrier plate 36 is annular and has a plug hole 38 in the middle, the camera 10 is mounted in the plug hole 38, each of the illuminating leds 37 is disposed on the light carrier plate 36, and the light carrier plate 36 is fixed in the mounting through hole 14.

In this embodiment, the plurality of illumination leds 37 are all disposed in the installation through hole 14, arranged in a ring shape, coaxial with the opening 3, and disposed around the camera 10, and because the plurality of illumination leds 37 are all coaxial with the opening 3, the optical path is short, and the illumination effect is good.

In another embodiment, referring to fig. 13 and 14, at least one illumination led 37 is mounted on the mounting base 16. Specifically, the fixing chassis 16 is provided with at least one mounting groove 39 corresponding to the illumination leds 37, and each illumination led 37 is mounted in one corresponding mounting groove 39. Each mounting groove 39 is also provided with a through hole 40, and each lighting light-emitting diode 37 is electrically connected with the control circuit through the through hole 40 and the mounting through hole 14 in sequence.

The second mounting position 35 is also provided with a battery 23, the battery 23 is also electrically connected with the control circuit, and the battery 23 is used for supplying power to the control circuit to enable the control circuit to work.

The main housing 1 is further provided with a charging data transmission interface 24, the charging data transmission interface 24 is electrically connected with the control circuit, and the charging data transmission interface 24 is used for charging and data transmission. The control circuit is used for controlling the charging data transmission interface 24 to charge the battery 23. The charging data transmission interface 24 may also be connected to an external display through a data line, so as to play the pictures shot by the camera 10 on the external display synchronously.

The cosmetic mirror 25 is further provided on the outer surface of the main housing 1, so that the user can easily confirm the overall effect by looking into the mirror after finishing blackhead suction. The cosmetic mirror 25 is coated with a fingerprint-proof film to prevent fingerprints from being left to affect the beauty of the mirror surface.

In the present embodiment, the main housing 1 includes a front case 26, a rear case 27, and a fixing base 33. The front shell 26 and the rear shell 27 are buckled with each other, so that the assembly of internal devices is facilitated, and the production is facilitated. The start key 28, the up key 29 and the down key 30 are provided on the front case 26, and the cosmetic mirror 25 is provided on the rear case 27.

The main housing 1 is used not only for accommodating various devices inside but also for being held by a user. Anti-skid devices are arranged on two sides of the outer surface of the main shell 1, so that a user is prevented from falling off due to slippery hands when holding the detector.

In this embodiment, the two sides of the outer surface of the main housing 1 are both provided with arc-shaped anti-slip grooves corresponding to fingers, and the arc-shaped anti-slip grooves are used for being placed when a user holds the detector.

In another embodiment, a plurality of raised anti-slip ribs arranged at intervals are arranged on both sides of the outer surface of the main housing 1, and can also play a role in anti-slip.

The fixed seat 33 is connected to one end of the front case 26 near the detection head. The mounting end face 31 is disposed on the fixing seat 33, and the first seal ring 4 is disposed on a side wall of the fixing seat 33.

The detector provided by the invention is provided with the negative pressure generating device, the negative pressure generating device is communicated with the accommodating cavity, and the negative pressure generating device generates negative pressure, so that the negative pressure is generated in the accommodating cavity, and further, the suction force is generated at the opening, and the foreign matters are adsorbed. The detector provided by the invention is also provided with a camera 10 in the accommodating cavity for shooting the scene at the opening 3. The detector is connected with an external display in a wired or wireless mode, and the picture shot by the camera 10 is displayed by the display, so that the process and the effect of removing the foreign matters can be seen at any time, a user does not operate blindly any more, and the pain of the human body caused by misoperation is avoided.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A detector, characterized in that: the negative pressure detecting device comprises a main shell and a detecting head connected to one end of the main shell, wherein a negative pressure generating device is arranged in the main shell; an accommodating cavity is formed between the detection head and the main shell, and the negative pressure generating device is communicated with the accommodating cavity;

2. The meter of claim 1, wherein: the mounting piece is positioned in the accommodating cavity and comprises a fixed chassis and a protective column shell connected to the fixed chassis; the fixed chassis is connected with one end, close to the detection head, of the main shell, and the protection column shell is sleeved on the camera.

3. The meter of claim 2, wherein: one end of the main shell close to the detection head is provided with an installation end face, and an installation side wall protruding out of the surface of the installation end face is arranged on the installation end face; the fixed chassis is connected with one end of the mounting side wall far away from the mounting end face in a sealing manner, and a closed air cavity is formed among the mounting end face, the mounting side wall and the fixed chassis; the mounting end face is provided with an air hole for communicating the negative pressure generating device and the air cavity, and the fixed chassis is provided with an air vent for communicating the air cavity and the accommodating cavity; the protective column shell is arranged at one end, far away from the installation side wall, of the fixing chassis, and the camera is fixedly connected onto the installation end face and penetrates through the fixing chassis to extend into the protective column shell.

4. The meter of claim 3, wherein: the fixed chassis is provided with a plurality of air vents, and the air vents are uniformly arranged on the fixed chassis along the circumferential direction of the protective column shell at intervals.

5. The meter of claim 3, wherein: the mounting end face is provided with a mounting column protruding towards one side of the fixed chassis, and a mounting through hole is formed in the mounting column; the installation end face is provided with a communicating hole communicated with the installation through hole, and the inner space of the main shell is communicated with the containing cavity through the communicating hole and the installation through hole.

6. The meter of claim 3, wherein: and a second sealing ring is connected to the side edge of the fixed chassis, and the second sealing ring is in interference fit with the inner surface of the mounting side wall and is detachably connected with the mounting side wall.

7. The meter of claim 3, wherein: the negative pressure generating device is an air pump; a first mounting position and a second mounting position are arranged in the main shell, and the first mounting position is farther away from the detection head relative to the second mounting position; the air suction pump is arranged in the first installation position and is connected with the air hole through a vent pipe; the second installation position is provided with a circuit board, the circuit board is provided with a control circuit, and the air pump and the camera are respectively and electrically connected with the control circuit.

8. The meter of claim 7, wherein: the camera comprises a lens, and the lens faces the direction of the opening and is arranged right opposite to the opening.

9. The meter of claim 1, wherein: at least one lighting light-emitting diode is arranged in the accommodating cavity.

10. The meter of claim 7, wherein: the Wi-Fi module is electrically connected with the control circuit.