An endoscope

Abstract

The present application relates to a kind of endoscopes, including handle and the steel pipe connected with handle, handle includes shell and the mounting plate arranged on shell, the surface of mounting plate is equipped with positioning boss, the surface of positioning boss is equipped with transmission hole penetrating positioning boss and mounting plate, the front side of positioning boss is equipped with insulating ring, steel pipe includes pipe body and the flange ring arranged in the rear end of pipe body, flange ring is located in the front side of insulating ring, endoscope further includes the insulating cover located in the outside of flange ring, insulating ring and positioning boss, insulating cover is tightly pressed on flange ring and insulating ring on positioning boss, the side wall of insulating cover is equipped with the perforation for pipe body to go out, the endoscope tube of the present application, its steel pipe is completely isolated from shell, even if handle shell is electrified, it will not affect steel pipe, in turn protect the lens assembly of steel pipe front end and the patient directly contacted with steel pipe, high insulation between handle and steel pipe, operation is safe.

Description

Technical Field

[0001] This invention relates to a medical device, and more particularly to an endoscope. Background Technology

[0002] An endoscope is a medical device that enters the human body through natural openings or surgical incisions to allow medical personnel to observe lesions.

[0003] Existing endoscopes, as described in publication CN209661603 entitled "An Electronic Laparoscope with Front-End LED Illumination", include a handle, a tube assembly disposed on the handle, and a lens and an image sensor assembly at the front end of the tube assembly.

[0004] In this type of endoscope, the tubular assembly is directly connected to the handle via screws or other means. The tubular assembly includes a steel tube. Although the handle is made of insulating materials such as plastic, the steel tube is in direct contact with the patient's body. If the handle becomes conductive due to external temperature, humidity, or other electrical faults, it poses a safety hazard to the patient, especially if the electrical network is damaged by external high voltage. Therefore, a new endoscope structure is needed to improve the insulation between the steel tube and the handle, reduce the risk of external voltage being introduced into the patient's body through the handle and steel tube, and improve operational safety. Summary of the Invention

[0005] To address the aforementioned technical problems, the purpose of this invention is to provide an endoscope with high insulation between the steel tube and the handle, and safe operation.

[0006] The endoscope of the present invention includes an endoscope, a handle, and a steel tube connected to the handle at one end. The handle includes a housing and a mounting plate disposed on the housing. The surface of the mounting plate is provided with a positioning boss. The surface of the positioning boss is provided with a transmission hole that penetrates the positioning boss and the mounting plate. An insulating ring is provided on the front side of the positioning boss. The steel tube includes a tube body and a flange ring disposed at the rear end of the tube body. The flange ring is located in front of the insulating ring. The endoscope also includes an insulating cover located outside the flange ring, the insulating ring, and the positioning boss. The insulating cover presses the flange ring and the insulating ring tightly against the positioning boss. A through hole is provided on the side wall of the insulating cover for the tube body to pass through.

[0007] The advantage of this endoscope lies in its mounting plate on the handle housing. The mounting plate has a positioning boss on its surface, and an insulating ring is located on the front side of the positioning boss. The flange ring at the rear end of the steel tube presses the insulating ring against the positioning boss on the mounting plate surface through its outer insulating cover. Because both the insulating cover and the insulating ring are made of highly insulating materials, such as polycarbonate, the flange ring at the rear end of the tube is completely enclosed by the insulating cover and the insulating ring, and the flange ring is separated from the positioning boss at the front end of the housing by the insulating ring. This completely isolates the steel tube from the housing, greatly increasing the creepage distance between the steel tube and the handle. Thus, even if the handle housing becomes electrified due to environmental factors such as temperature and humidity, it will not affect the steel tube, thereby protecting the lens assembly at the front end of the steel tube and the patient in direct contact with the steel tube, preventing safety accidents.

[0008] Furthermore, in the endoscope of the present invention, a support plate is provided inside the housing, and a mounting plate is fixed to the front end of the support plate. The front end of the housing is provided with an opening, and the mounting plate is located at the opening and fixed to the housing by bolts.

[0009] This design enables the connection between the mounting plate and the housing.

[0010] Furthermore, in the endoscope of the present invention, an end cap is provided on the front side of the insulating cover, the end cap is threadedly connected to the housing, and a decorative cover is also provided on the outer side of the end cap.

[0011] The end caps and decorative caps serve to press the insulating caps firmly onto the positioning bosses, while also providing protection for the internal components.

[0012] Furthermore, in the endoscope of the present invention, the end cap is also provided with an irregularly shaped sealing ring located on the front side of the insulating cover. One side of the irregularly shaped sealing ring is in contact with the inner wall of the end cap, and the other side is in contact with the outer wall of the insulating cover.

[0013] The irregularly shaped sealing ring ensures a seal for all components inside the end cap, preventing them from getting damp; it achieves an IPX7 rating, facilitating cleaning and maintenance of the endoscope after use in hospitals or other locations.

[0014] Furthermore, in the endoscope of the present invention, the surface of the support plate is provided with a groove for positioning optical fibers, and a signal conversion circuit board connected to the lens assembly is provided above the groove.

[0015] The cable trays are used to position the optical fibers, and the signal adapter circuit board is used to transmit the image from the camera cable to the external camera host.

[0016] Furthermore, in the endoscope of the present invention, a lens assembly is provided at the front end of the steel tube. The lens assembly includes a connector provided at the end of the steel tube, the rear end of the connector is inserted into the tube opening of the tube body, the middle part of the connector is a lens mounting cavity, and the front and rear sides of the lens mounting cavity are fiber optic head positioning cavities.

[0017] The design of components such as connectors, lens mounting cavities, and fiber optic head positioning cavities enables the installation and positioning of components such as CMOS lens modules and fiber optic output heads.

[0018] Furthermore, in the endoscope of the present invention, a camera assembly is provided in the lens mounting cavity. The camera assembly includes a binocular camera, which includes a horizontal circuit board parallel to the axis of the steel pipe and a vertical circuit board perpendicular to the horizontal circuit board. Two CMOS lens modules are mounted on the vertical circuit board.

[0019] The horizontally positioned circuit board and the vertically positioned circuit board reduce the overall volume of the circuit board, thereby reducing the overall size of the lens assembly and making it as small as possible for easy insertion into the human body. The CMOS lens module enables image acquisition.

[0020] Furthermore, in the endoscope of the present invention, a positioning plate fixed to the connector is provided on the front side of the vertical circuit board. The positioning plate is provided with two positioning holes, and the front ends of the two CMOS lens modules are located in the two positioning holes on the front side. A sapphire protective window is provided on the front side of the positioning plate.

[0021] The positioning plate and positioning holes enable the positioning and installation of the CMOS lens module. The sapphire protective window keeps the end face of the lens assembly flush, protecting the lens and ensuring imaging quality while eliminating stray light.

[0022] Furthermore, in the endoscope of the present invention, the horizontal circuit board is provided with pads, an ESD protection circuit and a conductive sheet electrically connected to the pads. The ESD protection circuit includes an anti-static component disposed on the horizontal circuit board, one end of the anti-static component is electrically connected to the conductive sheet and the other end is grounded.

[0023] The ESD protection circuit provides electrostatic protection for the lens assembly, preventing static electricity from being conducted to the vertical circuit board on which the CMOS lens module is mounted, thus achieving electrostatic protection for the lens.

[0024] Furthermore, in the endoscope of the present invention, the end of the camera cable inside the tube is soldered to the pad via a molten conductor that completely covers the pad.

[0025] The molten conductor that completely covers the pads allows for maximum contact area between the camera cable wires and the pads, thereby reducing the impedance between the pads and the wires and improving the transmission effect of high-frequency image data.

[0026] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the following describes the embodiments of the present invention in detail. Attached Figure Description

[0027] Figure 1 It is a 3D image of an endoscope;

[0028] Figure 2 This is a diagram of the internal structure of an endoscope, where the housing and lens assembly are not shown.

[0029] Figure 3 This is an internal disassembly diagram of the casing.

[0030] Figure 4 This is a cross-sectional view of an endoscope;

[0031] Figure 5 It is a three-dimensional view of the shell;

[0032] Figure 6 This is a cross-sectional view of an irregularly shaped sealing ring;

[0033] Figure 7 It is a 3D diagram of the connector;

[0034] Figure 8 This is a 3D view of another corner of the connector;

[0035] Figure 9 It is a 3D diagram of the lens assembly, camera cable, and signal adapter interface;

[0036] Figure 10 This is a schematic diagram showing the connection between the horizontal circuit board and the camera cable;

[0037] Figure 11 This is a block diagram showing the connection between the horizontal and vertical circuit boards.

[0038] Figure 12 Schematic diagram of a horizontal circuit board;

[0039] Figure 13 This is a schematic diagram of a vertical circuit board.

[0040] The components include: housing 1, mounting plate 2, positioning boss 3, transmission hole 4, insulating ring 5, tube body 6, flange ring 7, insulating cover 8, perforation 9, support plate 10, opening 11, positioning platform 12, end cover 13, decorative cover 14, irregular sealing ring 15, annular positioning groove 16, positioning ring 17, sealing ring 18, optical fiber 19, wire groove 20, optical fiber connector 21, pressure block 22, camera cable 23, cable adapter interface 24, cable connector 25, button 26, button circuit board 27, keyway 28, button adapter interface 29, connector head 30, lens mounting cavity 31, optical fiber head positioning cavity 32, horizontal circuit board 33, vertical circuit board 34, CMOS lens module 35, support column 36, positioning plate 37, positioning hole 38, sapphire protective window 38, solder pad 39, conductive sheet 40, and anti-static component 41. Detailed Implementation

[0041] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0042] See Figures 1 to 13 The endoscope of this embodiment includes a handle and a steel tube connected to the handle at one end. The handle includes a housing 1 and a mounting plate 2 on the housing. The surface of the mounting plate is provided with a positioning boss 3. The surface of the positioning boss is provided with a transmission hole 4 that penetrates the positioning boss and the mounting plate. An insulating ring 5 is provided on the front side of the positioning boss. The steel tube includes a tube body 6 and a flange ring 7 provided at the rear end of the tube body. The flange ring is located in front of the insulating ring. The endoscope also includes an insulating cover 8 located outside the flange ring, the insulating ring and the positioning boss. The insulating cover presses the flange ring and the insulating ring onto the positioning boss. A through hole 9 is provided on the side wall of the insulating cover for the tube body to pass through.

[0043] The endoscope of this invention has a mounting plate on its handle housing. The surface of the mounting plate has a positioning boss, and an insulating ring is located on the front side of the positioning boss. The flange ring at the rear end of the steel tube presses the insulating ring against the positioning boss on the surface of the mounting plate through an insulating cap on its outer side. Because both the insulating cap and the insulating ring are made of highly insulating materials, such as polycarbonate, the flange ring at the rear end of the tube is completely enclosed by the insulating cap and the insulating ring, and the flange ring is separated from the positioning boss at the front end of the housing by the insulating ring. This completely isolates the steel tube from the housing, greatly increasing the creepage distance between the steel tube and the handle. Thus, even if the handle housing becomes electrified due to environmental factors such as temperature and humidity, it will not affect the steel tube, thereby protecting the lens assembly at the front end of the steel tube and the patient in direct contact with the steel tube, preventing safety accidents.

[0044] The handle is used by medical staff to operate the endoscope, and the steel tube is used to install the lens assembly and wiring. The mounting plate is used to install components such as positioning bosses, insulating rings, insulating covers, and flange rings.

[0045] Preferably, in this embodiment, the endoscope has a support plate 10 inside the housing, a mounting plate fixed to the front end of the support plate, an opening 11 at the front end of the housing, and the mounting plate is located at the opening and fixed to the housing by bolts.

[0046] This design enables the connection between the mounting plate and the housing.

[0047] In this embodiment, the mounting plate is circular with a transmission hole 4 in its center. The mounting plate consists of two semicircular rings, one of which is integrally formed with the support plate.

[0048] The positioning boss 3 is a regular octagonal prism. Similar to the mounting plate, the positioning boss is formed by connecting two semi-regular octagonal prisms with bolts. Each regular octagonal prism is integrally formed with its corresponding semi-circular ring. The transfer hole extends from the front face of the positioning boss to the rear side of the mounting plate.

[0049] During installation, the support plate is fixed to the bottom of the housing, and the rear side of the mounting plate abuts against the positioning platform 12 at the front end of the housing. The operator fixes the mounting plate to the housing with bolts.

[0050] The pipe body passes through the perforation in the side wall of the insulating cover from the rear until the front surface of the flange ring at its rear end contacts the inner wall of the insulating cover. The operator can then place the insulating ring behind the flange ring and bring it into contact with the end face of the flange ring. Next, the operator places the insulating cover, along with the flange ring and insulating ring inside, onto the positioning boss until the insulating cover presses the flange ring and insulating ring firmly against the positioning boss.

[0051] The insulating cover can be directly connected to the positioning boss by means of screwing, interference fit, etc., or the insulating cover can be pressed onto the positioning boss by the end cover 13 connected to the housing.

[0052] After tightening, the operator can also use bolts to connect the insulating cover to the flange ring and the positioning boss respectively to further strengthen its firmness and prevent the insulating cover from loosening from the positioning boss.

[0053] In this embodiment, an end cap is provided on the front side of the insulating cover, and the end cap is threadedly connected to the housing. A decorative cover 14 may also be provided on the outer side of the end cap. Both the end cap and the decorative cover are made of insulating materials such as plastic.

[0054] To enhance sealing, an irregularly shaped sealing ring 15 is provided inside the end cap, located on the front side of the insulating cover. The irregularly shaped sealing ring is bowl-shaped, with one side fitting against the inner wall of the end cap and the other side fitting against the outer wall of the insulating cover. For positioning, an annular positioning groove 16 for positioning the irregularly shaped sealing ring can be provided on the end face of the insulating cover, and a positioning ring 17 adapted to the annular positioning groove is provided on the rear surface of the irregularly shaped sealing ring.

[0055] For further sealing, a sealing ring 18 can also be provided between the end cap and the housing.

[0056] The support plate can be provided with a groove 20 for positioning the optical fiber 19 on its surface, and a signal conversion circuit board (not shown in the figure) connected to the lens assembly can be provided on its upper surface. The signal conversion circuit board can be fixed to the upper surface of the support plate by bolts.

[0057] During installation, the optical fiber inside the steel pipe extends into the housing through the transmission hole and is transmitted along the groove on the surface of the support plate to the optical fiber connector 21 at the other end of the housing. The optical fiber connector is connected to the external light source host through the external beam guide.

[0058] To secure the optical fiber, a pressure block 22 connected to the support plate can be installed above the cable tray. During installation, the pressure block presses down on the optical fiber to prevent it from moving out of the cable tray.

[0059] The camera cable 23, which connects to the lens assembly, extends into the housing through the transmission hole on the mounting plate and then connects to the signal conversion circuit board via the cable adapter interface 24. The cable connected to the other end of the signal conversion circuit board connects to an external controller, such as a camera host or monitor, via the cable connector 25 at the rear of the housing.

[0060] The surface of the housing is also provided with several buttons 26. Below the buttons is a button circuit board 27 connected to the housing. The button circuit board is fixed in the keyway 28 on the surface of the housing by bolts. The bottom surface of the button circuit board is provided with a button adapter interface 29 connected to the signal adapter circuit board.

[0061] A keyway is fitted with a key mounting block that is fixed to the key circuit board and is used to install the key and achieve a sealing function. The key mounting block has several key mounting holes that are adapted to the key. The key is installed in the key mounting hole. The key circuit board below it has a switch corresponding to the key.

[0062] The lens assembly is located at the front end of the steel pipe, and includes a connector 30 located at the end of the steel pipe, with the rear end of the connector inserted into the pipe opening. The middle part of the connector is a lens mounting cavity 31, in which the camera assembly is mounted. Optical fiber head positioning cavities 32 are located on both the front and rear sides of the lens mounting cavity, in which the optical fiber output head is positioned.

[0063] The camera assembly includes a binocular camera, which comprises a horizontal circuit board 33 parallel to the axis of the steel pipe and a vertical circuit board 34 perpendicular to the horizontal circuit board. Two CMOS lens modules 35 are mounted on the vertical circuit board. The horizontal circuit board is connected to and communicates with the vertical circuit board via a micro-connector.

[0064] The horizontal circuit board is set horizontally and the vertical circuit board is set vertically, which can reduce the overall volume of the circuit board, thereby reducing the overall volume of the lens assembly and making it as small as possible so that it can be easily inserted into the human body.

[0065] During installation, the horizontal circuit board is directly mounted into the lens mounting cavity via the support column 36. The front side of the vertical circuit board is provided with a positioning plate 37 that is fixed to the connector. The positioning plate is provided with two positioning holes 38, and the front ends of the two CMOS lens modules are located in the two positioning holes on the front side.

[0066] A sapphire protective window 38 can be provided on the front side of the positioning plate to keep the end face of the lens assembly flush, protect the lens and ensure imaging effect, and eliminate stray light.

[0067] The horizontal circuit board is connected to the signal conversion circuit board inside the housing via the camera cable inside the steel pipe and the cable adapter interface inside the housing, thereby realizing signal transmission.

[0068] To address electrostatic interference, a common solution is to place conventional anti-static devices such as ferrite beads or inductors between the lens assembly and the signal transceiver circuit board. Static electricity is dissipated by the magnetic induction of the ferrite bead or inductor as it passes through these devices. The rate of dissipation depends on the strength of the magnetic induction; stronger induction dissipates static electricity faster, requiring larger ferrite beads or inductors. Furthermore, ferrite beads and inductors indiscriminately consume passing signals, thus weakening normally transmitted signals.

[0069] To address the aforementioned issues and enhance the anti-static properties of the lens assembly, an ESD protection circuit is installed between the lens assembly and the signal transfer circuit board of the endoscope.

[0070] Specifically, the horizontal circuit board of the lens assembly is provided with pads 39, and each wire of the camera cable is directly soldered to the pads. The pads are connected to the relevant device pins on the horizontal circuit board through conductive sheets 40, such as gold foil, on the surface of the horizontal circuit board. The ESD protection circuit includes an anti-static component 41 provided on the horizontal circuit board. One end of the anti-static component is connected to the conductive sheet, and the other end is grounded.

[0071] The inclusion of anti-static components ensures complete insulation between the module and the steel pipe at the head end, so static electricity can only be conducted to the horizontal circuit board of the lens assembly through the camera cable.

[0072] When static electricity is conducted to the lens assembly through the camera cable, it passes through the anti-static component on the horizontal circuit board. The static electricity will not directly enter other parts of the horizontal circuit board, but will be directly released to the ground through the anti-static component, so that the static electricity flows into the ground. In the end, the static electricity will not stay on the vertical circuit board, thus preventing damage to the CMOS lens module and ensuring the stable operation of the lens assembly.

[0073] Compared to conventional designs, the anti-static component in this design is not connected in series in the signal circuit, and it does not consume static electricity itself. Instead, it conducts the static electricity to ground upon detection, allowing for a very small size. The anti-static component is made of semiconductor material, primarily germanium, and forms a PN junction inside. By controlling the concentration of its components, a conduction voltage is set for the component. During normal operation, the anti-static component is off. When static electricity arrives and the voltage is significantly higher than the voltage of the CMOS lens module, the component conducts, releasing the static electricity. After the static electricity is released, the voltage on the component returns to normal, and the anti-static device returns to its off state.

[0074] To further enhance anti-static performance, an anti-static material layer, made of stainless steel, can be applied to the steel pipe. Upon receiving static electricity, this layer quickly dissipates it, preventing it from penetrating the interior and thus protecting the lens assembly inside the steel pipe. This design results in more stable images output by the lens assembly and reduces the design complexity of devices connecting to the lens assembly.

[0075] The amount of data transmitted between the lens assembly and the signal conversion circuit board is relatively large, so the system design requires that internal data be transmitted using high-frequency signals. When using high-frequency signals, the impedance at the connection interfaces between modules cannot be ignored, because the impedance at the interface will inhibit signal transmission. If the impedance is too high, it will lead to image loss. Without affecting image transmission, the lower the impedance, the better the image quality. Therefore, a design with lower impedance is required to improve image quality.

[0076] In conventional designs, sockets are soldered onto horizontal circuit boards. The plug at the end of the camera cable either inserts into the pads via pins or is pressed onto the pads via elastic contacts. These connection methods result in a small contact area between the plug and socket, leading to significant impedance and reduced signal transmission efficiency. In some designs, the plug pins are soldered onto pads, but the area of ​​the plug pins is smaller than that of the pads, resulting in still relatively high impedance.

[0077] To increase the conductor area, a superior conductor is used during soldering to expand the surface area of ​​the camera cable conductor, making the conductor surface area infinitely close to the pad area. The superior conductor used in this design melts at a temperature above 200 degrees Celsius and automatically adheres to the conductor after melting. When the conductor contacts the pad, the superior conductor flows on the surface of the pad at a high temperature above 200 degrees Celsius, ultimately expanding the conductor surface area on the pad surface to be infinitely close to the pad area.

[0078] Compared to other designs, this design can significantly reduce contact resistance, thereby improving image imaging and making the image clearer.

[0079] To improve insulation, the connector can be filled with insulating material to completely enclose the electronic components of the lens assembly, allowing them to operate stably in a constant environment.

[0080] The insulating material, in a viscous fluid state, completely fills the gaps and spaces within the lens assembly during the wrapping process. Once filled, the lens assembly is completely air-free, maintaining a constant internal state regardless of environmental changes. Furthermore, the insulating material gradually solidifies over time after completely wrapping the lens assembly, eventually becoming fully cured. This improves the resilience of the wires to external forces during lens assembly use.

[0081] The horizontal circuit board houses the clock crystal oscillator circuit required for the CMOS lens module, the external cable interface (cable adapter interface), and protection circuitry at the cable interface. The cable adapter interface is divided into two sets: a 20-pin interface handles MIPI signal and control interface communication; the other 4-pin interface handles the transmission of the required CMOS voltage levels. The protection circuitry primarily protects the control communication and control pins, while the power supply circuitry includes an LC circuit for filtering.

[0082] The camera cables inside the steel conduit consist of two types: low-impedance shielded micro-coaxial cables for signal transmission and low-impedance single-core cables for power supply. To ensure the stability of the lens assembly, both types of cables are wrapped with a layer of shielding tape. During the encapsulation process, operators use specific tooling to ensure that all camera cables do not come into contact with the inner wall of the steel conduit.

[0083] The above are merely preferred embodiments of the present invention, used to assist those skilled in the art in implementing the corresponding technical solutions, and are not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is defined by the appended claims. It should be noted that, for those skilled in the art, several equivalent improvements and modifications can be made based on the technical solutions of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Furthermore, it should be understood that although this specification describes the embodiments as described above, not every embodiment contains only one independent technical solution. This descriptive method is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions of each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An endoscope, comprising a handle and a steel tube connected at one end to the handle, characterized in that: The handle includes a housing and a mounting plate on the housing. The surface of the mounting plate is provided with a positioning boss. The surface of the positioning boss is provided with a transmission hole that penetrates the positioning boss and the mounting plate. An insulating ring is provided on the front side of the positioning boss. The steel pipe includes a pipe body and a flange ring provided at the rear end of the pipe body. The flange ring is located in front of the insulating ring. The endoscope also includes an insulating cover located outside the flange ring, the insulating ring and the positioning boss. The insulating cover presses the flange ring and the insulating ring tightly onto the positioning boss. The side wall of the insulating cover is provided with a through hole for the pipe body to pass through. The housing is provided with a support plate, and the mounting plate is fixed to the front end of the support plate. The front end of the housing is provided with an opening, and the mounting plate is located at the opening and fixed to the housing with bolts. An end cap is provided on the front side of the insulating cover. The end cap is connected to the housing by threads, and a decorative cover is also provided on the outside of the end cap. The end cap is also provided with a special-shaped sealing ring located in front of the insulating cover. One side of the special-shaped sealing ring is attached to the inner wall of the end cap, and the other side is attached to the outer wall of the insulating cover.

2. The endoscope according to claim 1, characterized in that: The surface of the support plate is provided with a groove for positioning optical fibers, and a signal conversion circuit board connected to the lens assembly is provided above the groove.

3. The endoscope according to claim 1, characterized in that: The front end of the steel pipe is equipped with a lens assembly, which includes a connector located at the end of the steel pipe. The rear end of the connector is inserted into the pipe opening of the pipe body. The middle part of the connector is a lens mounting cavity, and the front and rear sides of the lens mounting cavity are fiber optic head positioning cavities.

4. The endoscope according to claim 3, characterized in that: The lens mounting cavity is equipped with a camera assembly, which includes a binocular camera. The binocular camera includes a horizontal circuit board parallel to the axis of the steel pipe and a vertical circuit board perpendicular to the horizontal circuit board. Two CMOS lens modules are mounted on the vertical circuit board.

5. The endoscope according to claim 4, characterized in that: The vertical circuit board has a positioning plate on the front side that is fixed to the connector. The positioning plate has two positioning holes, and the front ends of the two CMOS lens modules are located in the two positioning holes on the front side. The positioning plate has a sapphire protective window on the front side.

6. The endoscope according to claim 4, characterized in that: The horizontal circuit board is provided with pads, an ESD protection circuit and a conductive sheet electrically connected to the pads. The ESD protection circuit includes an anti-static component disposed on the horizontal circuit board. One end of the anti-static component is electrically connected to the conductive sheet and the other end is grounded.

7. The endoscope according to claim 6, characterized in that: The end of the camera cable inside the tube is soldered to the pad through a molten conductor that completely covers the pad.

Images