Electronic endoscope with viewing angle and manufacturing method thereof

Abstract

The invention discloses an electronic endoscope with a viewing angle and a manufacturing method thereof, and belongs to the technical field of endoscopes, the electronic endoscope comprises a head end seat, a guide tube and a test board, an electronic endoscope module is mounted in the head end seat, the electronic endoscope module comprises an electronic endoscope lens, a light source and a circuit board, and the electronic endoscope lens is mounted in the guide tube. The electronic endoscope lens and the light source are electrically connected with the circuit board, a circuit of the circuit board is electrically connected with the test board, and a female header is arranged on the test board. The manufacturing method comprises the following steps: S1, preparing a test board and a head end seat with an electronic endoscope module; and S2, preparing a guide pipe, installing the head end seat at the head end of the guide pipe, enabling a line of the circuit board to extend into the guide pipe, and then enabling the line to extend out from the tail end of the guide pipe to be connected with the test board. The electronic endoscope module is used for replacing an optical hard lens, so that the electronic endoscope has the function of a direction angle, is simple in structure, few in assembly parts and low in precision requirement, cannot be easily damaged due to collision, and reduces the design cost, the manufacturing cost and the maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to an electronic endoscope with a viewing angle and a manufacturing method thereof. Background Art

[0002] At present, endoscopes with viewing angles on the market generally adopt the solution of optical hard mirror system, which mainly includes host, optical hard mirror, minimally invasive consumables, peripheral equipment, etc. Among them, the host and peripheral equipment are generally not easily damaged except when they are severely bumped, but the optical hard mirror is different. The optical hard mirror is a very high-precision device and is easily damaged when it encounters a bump. In addition, the optical hard mirror has many components and a complex structure, including the mechanical part (mirror body, outer tube, inner tube, light cone, eyepiece cavity), optical part (objective lens, cylindrical optical lens, eyepiece, photosensitive chip) and light guide part (filamentary light guide fiber), resulting in high design and processing costs of the endoscope, and once damaged, the subsequent maintenance cost is also extremely high. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned technical problems and to provide an electronic endoscope with a viewing angle and a method for manufacturing the same. The optical hard endoscope is replaced by an electronic endoscope module, which can not only realize the function of an endoscope with a viewing angle, but also has a simple structure, fewer assembly parts, and low precision requirements. It will not be easily damaged by bumps, thereby reducing the design cost, production cost, and later maintenance cost of the electronic endoscope.

[0004] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention discloses an electronic endoscope with a viewing angle, comprising a head end seat, a guide tube and a test board, wherein the head end seat is installed at the head end of the guide tube, and an electronic endoscope module is installed in the head end seat, wherein the electronic endoscope module comprises an electronic endoscope lens, a light source and a circuit board, wherein the axis of the electronic endoscope lens has a preset angle with the axis of the head end seat, the electronic endoscope lens, the light source and the circuit board are electrically connected, the circuit of the circuit board extends out through the tail end of the guide tube and is electrically connected to the test board, and a female header is provided on the test board for connection of a header pin.

[0005] Preferably, the circuit board includes a rigid circuit board and a flexible circuit board, the rigid circuit board is provided with a through hole and a light source mounting position for installing the light source, the light source is electrically connected to the rigid circuit board, the electronic endoscope lens passes through the through hole and is fixedly connected to the rigid circuit board, the electronic endoscope lens is electrically connected to the flexible circuit board, the flexible circuit board extends into the guide tube, and the circuits of the rigid circuit board and the flexible circuit board extend through the tail end of the guide tube.

[0006] Preferably, the head end and the tail end of the head end seat are respectively provided with a mounting hole and a sleeve hole, the mounting hole and the sleeve hole are connected to each other, a limiting ring is provided between the mounting hole and the sleeve hole, the rigid circuit board is located in the mounting hole, the rigid circuit board abuts and is fixed to the limiting ring, and the electronic endoscope lens passes through the limiting ring and extends into the sleeve hole.

[0007] Preferably, the guide tube comprises an inner sleeve and an outer sleeve, one end of the inner sleeve is sleeved and fixed in the sleeve hole, the other end of the inner sleeve is sleeved and fixed in the outer sleeve, and the outer sleeve abuts and is fixed to the head end seat.

[0008] Preferably, the light source is an LED light source.

[0009] Also disclosed is a method for manufacturing an electronic endoscope with a viewing angle, comprising the following steps:

[0010] S1. Prepare a test board with a female connector and a head end seat with an electronic endoscope module installed therein, wherein the electronic endoscope module comprises an electronic endoscope lens, a light source and a circuit board, wherein the electronic endoscope lens and the light source are electrically connected to the circuit board, and the axis of the electronic endoscope lens and the axis of the head end seat have a preset angle;

[0011] S2. Prepare a guide tube, install the head end seat on the head end of the guide tube, extend the circuit of the circuit board into the guide tube, and then extend it from the tail end of the guide tube to connect with the test board.

[0012] Preferably, the process of manufacturing the head end seat with the electronic endoscope module installed in step S1 is as follows:

[0013] Prepare a head end seat, a rigid circuit board, a light source, a flexible circuit board and an electronic endoscope lens, wherein the head end and the tail end of the head end seat are respectively provided with a mounting hole and a sleeve hole, the mounting hole and the sleeve hole are interconnected, a limiting ring is provided between the mounting hole and the sleeve hole, and a through hole and a light source mounting position are provided on the rigid circuit board;

[0014] Fix the light source on the light source mounting position, electrically connect the light source to the rigid circuit board, electrically connect and fix the electronic endoscope lens to the flexible circuit board, pass the electronic endoscope lens through the through hole, and then fix the electronic endoscope lens on the rigid circuit board, insert the rigid circuit board into the mounting hole, abut and fix the rigid circuit board to the limiting ring, and insert the flexible circuit board into the guide tube.

[0015] Preferably, in step S2, the guide tube and head end seat installation process: prepare an outer sleeve and an inner sleeve as the guide tube, insert the inner sleeve into and fix it in the sleeve hole, sleeve the flexible circuit board in the inner sleeve, and then sleeve the head end of the outer sleeve on the inner sleeve and fix it, the head end of the outer sleeve abuts and fixes against the head end seat, and the circuits of the rigid circuit board and the flexible circuit board are led out from the tail end of the outer sleeve and connected to the test board.

[0016] Preferably, the inner sleeve is bonded to the sleeve hole by glue, the outer sleeve is bonded to the inner sleeve by glue, and the outer sleeve and the head end seat are bonded at their abutment by glue.

[0017] Preferably, the light source is an LED light source.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] In the present invention, an electronic endoscope module is used to replace the optical hard endoscope, and a preset angle is set between the electronic endoscope lens and the axis of the head end seat, so that the electronic endoscope module can realize the function of an endoscope with a viewing angle. In addition, the electronic endoscope module has a simple structure, few assembly parts, and does not require as high precision as an optical endoscope, and will not be easily damaged by bumps, thereby reducing the design cost, production cost and later maintenance cost of the electronic endoscope, and the size can be made smaller, which greatly meets the doctor's demand for an endoscope with a viewing angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic structural diagram of an electronic endoscope with a viewing angle in an embodiment;

[0022] Figure 2 is a schematic cross-sectional structural diagram of an electronic endoscope with a viewing angle in an embodiment;

[0023] Figure 3 Schematic diagram of the front stereoscopic structure of the head end seat with the electronic endoscope module in the embodiment;

[0024] Figure 4 Schematic diagram of the rear stereoscopic structure of the head end seat with the electronic endoscope module in the embodiment;

[0025] Figure 5is a schematic cross-sectional structural diagram of the head end seat in the embodiment;

[0026] Figure 6 It is a front view stereoscopic structural diagram of the head end seat in the embodiment;

[0027] Figure 7 It is a rear perspective structural schematic diagram of the head end seat in the embodiment;

[0028] Figure 8 is a schematic side view of the structure of the electronic endoscope lens in the embodiment;

[0029] Fig. 9 is a front-view stereoscopic structural schematic diagram of an electronic endoscope lens in an embodiment;

[0030] Fig.10 is a rear-view stereoscopic structural schematic diagram of the electronic endoscope lens in the embodiment;

[0031] Fig.11 is a front perspective structural diagram of a rigid circuit board in an embodiment;

[0032] Fig.12 is a schematic cross-sectional structural diagram of a rigid circuit board in an embodiment;

[0033] Fig.13 is a front structural schematic diagram of the inner sleeve in the embodiment;

[0034] Fig.14 is a schematic cross-sectional structural diagram of the inner sleeve in the embodiment;

[0035] Fig.15 is a front structural schematic diagram of an outer sleeve in an embodiment;

[0036] Fig.16 is a schematic cross-sectional structural diagram of an outer sleeve in an embodiment;

[0037] Fig.17 is a schematic diagram of the structure of the test board in the embodiment;

[0038] Fig.18 It is a front view structural schematic diagram of the mother busbar in the embodiment.

[0039] Explanation of the reference numerals: 1. head end seat; 2. test board; 3. female header; 4. outer sleeve; 5. inner sleeve; 6. electronic endoscope lens; 7. light source; 8. rigid circuit board; 9. flexible circuit board; 10. wiring harness; 11. through hole; 12. mounting hole; 13. sleeve hole; 14. limit ring; 15. solder ball. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1

[0042] This embodiment provides an electronic endoscope with a viewing angle, such as Figures 1 to 18 As shown, it includes a head end seat 1, a guide tube and a test board 2. The head end seat 1 is installed at the head end of the guide tube, and an electronic endoscope module is installed in the head end seat 1. The electronic endoscope module includes an electronic endoscope lens 6, a light source 7 and a circuit board. The axis of the electronic endoscope lens 6 and the axis of the head end seat 1 have a preset angle, and the electronic endoscope lens 6 and the light source 7 are electrically connected to the circuit board. The circuit of the circuit board extends through the tail end of the guide tube and is electrically connected to the test board 2, and the test board 2 is provided with a female connector 3 for connecting the pins. The signal of the electronic endoscope lens 6 is transmitted to the test board 2 through the circuit of the circuit board. After the female connector 3 of the test board 2 is connected to the pin connector of the image main board, the collected image can be output, and the electrical connection of the light source 7 is also realized. Replacing the optical hard mirror with an electronic endoscope can realize the function of the endoscope with a viewing angle, and its structure is simple and the assembly parts are few, so that the electronic endoscope has a low cost and a smaller size, which greatly meets the doctor's demand for an endoscope with a viewing angle.

[0043] In one embodiment, if Figures 1 to 18As shown, the circuit board includes a rigid circuit board 8 and a flexible circuit board 9. A through hole 11 and a light source installation position are provided on the rigid circuit board 8, and the light source 7 is installed on the light source installation position and electrically connected to the rigid circuit board 8. The light source 7 and the rigid circuit board 8 can be fixed by welding, and of course they can also be fixed by other fixing methods. The circuit of the light source 7 is welded and fixed to the rigid circuit board 8 to achieve electrical conduction. The electronic endoscope lens 6 passes through the through hole 11 and is fixedly connected to the rigid circuit board 8. The electronic endoscope lens 6 is fixed and electrically connected to the flexible circuit board 9. As a preferred embodiment, the electronic endoscope lens 6 and the flexible circuit board 9 are fixed by welding, such as the electronic endoscope lens 6 and the flexible circuit board 9 are welded by solder balls 15, and the circuit of the electronic endoscope lens 6 is also welded and fixed to the flexible circuit board 9 to achieve electrical connection. The flexible circuit board 9 extends into the guide tube, and the circuits of the rigid circuit board 8 and the flexible circuit board 9 extend through the tail end of the guide tube. The circuits of the rigid circuit board 8 and the flexible circuit board 9 can be straightened together to form a wiring harness 10, and then the wiring harness 10 extends out of the guide tube and is electrically connected to the test board 2. A flexible circuit board 9 is used, and the flexible circuit board 9 can be completely installed in the guide tube, so that the installation of the head end seat 1 and the guide tube becomes convenient, and the electronic endoscope lens 6 and the head end seat 1 are set at a preset angle.

[0044] In one embodiment, if Figures 1 to 18 As shown, a plurality of light source mounting positions are provided on the rigid circuit board 8, and the plurality of light source mounting positions are arranged around the through hole 11, and each light source mounting position is installed with a light source 7. The number and position of the light source mounting positions can be set as required, that is, the number and position of the light sources 7 can be set as required. Preferably, four light source mounting positions can be set, that is, four light sources 7 are arranged around the electronic endoscope lens 6, and the four light sources 7 can also be arranged symmetrically. Of course, more than four light sources can also be set.

[0045] In one embodiment, if Figures 1 to 18 As shown, the head end and the tail end of the head end seat 1 are respectively provided with a mounting hole 12 and a sleeve hole 13. The mounting hole 12 and the sleeve hole 13 are interconnected, and a limit ring 14 is provided between the mounting hole 12 and the sleeve hole 13. The rigid circuit board 8 is located in the mounting hole 12, and the rigid circuit board 8 abuts and is fixed to the limit ring 14. Preferably, the rigid circuit board 8 and the limit ring 14 are fixed by glue, and of course other fixing methods can also be used. The electronic endoscope lens 6 passes through the limit ring 14 and extends into the sleeve hole 13. A part of the flexible circuit board 9 is located in the sleeve hole 13 and is fixed and electrically connected to the electronic endoscope lens 6, and another part of the flexible circuit board 9 extends into the guide sleeve.

[0046] In one embodiment, if Figures 1 to 18As shown, the guide tube includes an outer sleeve 4 and an inner sleeve 5. One end of the inner sleeve 5 is sleeved and fixed in the sleeve hole 13, and can be fixed by glue or other fixing methods. The other end of the inner sleeve 5 is sleeved and fixed in the outer sleeve 4, and can be fixed by glue or other fixing methods. The outer sleeve 4 is abutted and fixed with the head end seat 1. The flexible circuit board 9 extends into the inner sleeve 5.

[0047] In one embodiment, if Figures 1 to 18 As shown, the light source 7 is an LED light source. Of course, the light source 7 can also be other cold light sources.

[0048] In one embodiment, if Figures 1 to 18 As shown, the electronic endoscope lens 6 can be a wafer-level WLO lens or a traditional injection-molded or molded lens, without limiting the specific type.

[0049] In one embodiment, if Figures 1 to 18 As shown, the head end seat 1 can be made of CNC-processed metal or plastic material, mold-processed metal or plastic material, or 3D-printed metal or plastic material, and the type and material of the head end seat 1 are not limited.

[0050] In one embodiment, if Figures 1 to 18 As shown, the design parameters of each component of the electronic endoscope with viewing angle are provided as a reference.

[0051] The length, width and height of the electronic endoscope lens 6 are B1, B2 and H1 respectively. Considering the size fluctuation of the electronic endoscope lens 6 and the size fluctuation of the rigid circuit board 8, the opening A1 of the rigid circuit board 8 is B1+0.05~0.4mm, and A2 is B2+0.05~0.4mm. The diameter D1 of the rigid circuit board 8 should ensure that the LED light source is completely wrapped. The thickness H2 of the rigid circuit board 8 is generally selected to be 0.25~0.4mm, and the height H3 of the LED light source is generally selected to be 0.15~2mm. The opening D2 of the head end seat 1 is D1+0.1mm of the rigid circuit board 8, the wall thickness C1 of the head end seat 1 is generally selected to be 0.05~0.2, the D4 of the head end seat 1 is ≥H1*SIN(E)+A1, the angle E is generally selected to be 5~40 degrees, and the maximum outer diameter D3 of the head end seat 1 is D4+C1*2. The outer diameter D5 of the inner sleeve 5 should be slightly smaller than the D4 of the head end seat 1 to facilitate assembly and meet the waterproof requirements of the endoscope. The inner diameter D6 of the outer sleeve 4 should be slightly larger than the outer diameter D5 of the inner sleeve 5, and the outer diameter D7 of the outer sleeve 4 should be consistent with the size D3 of the head end seat 1.

[0052] Example 2

[0053] This embodiment provides a method for manufacturing an electronic endoscope with a viewing angle, such as Figures 1 to 18 As shown, the following steps are included:

[0054] S1, prepare a test board 2 with a female header 3 and a head end seat 1 in which an electronic endoscope module is installed; the electronic endoscope module includes an electronic endoscope lens 6, a light source 7 and a circuit board, the electronic endoscope lens 6, the light source 7 and the circuit board are electrically connected, and the axis of the electronic endoscope lens 6 and the axis of the head end seat 1 have a preset angle;

[0055] S2. Prepare a guide tube, install the head end seat 1 on the head end of the guide tube, extend the circuit board's line into the guide tube, and then extend it from the tail end of the guide tube to connect with the test board 2.

[0056] Through the above two steps, an electronic endoscope with a viewing angle can be completed, and the electronic endoscope with a viewing angle can be the electronic endoscope with a viewing angle in Example 1. By replacing the optical hard endoscope with an electronic endoscope, the function of the endoscope with a viewing angle can be realized, and the structure is simple and the assembly parts are few, so that the electronic endoscope has a low cost and a smaller size, which greatly meets the doctor's demand for an endoscope with a viewing angle.

[0057] In one embodiment, if Figures 1 to 18 As shown, the process of making the head end seat with the electronic endoscope module installed in step S1 is as follows:

[0058] Prepare a head end seat 1, an electronic endoscope lens 6, a light source 7, a rigid circuit board 8 and a flexible circuit board 9. The head end and the tail end of the head end seat 1 are respectively provided with a mounting hole 12 and a sleeve hole 13. The mounting hole 12 and the sleeve hole 13 are connected to each other. A limiting ring 14 is provided between the mounting hole 12 and the sleeve hole 13. The rigid circuit board 8 is provided with a through hole 11 and a light source mounting position;

[0059] Fix the light source 7 on the light source installation position, electrically connect the light source 7 to the rigid circuit board 8, electrically connect and fix the electronic endoscope lens 6 to the flexible circuit board 9, pass the electronic endoscope lens 6 through the through hole 11, and fix the electronic endoscope lens 6 on the rigid circuit board 8, insert the rigid circuit board 8 into the installation hole 12, and abut and fix the rigid circuit board 8 to the limiting ring 14. At this time, the electronic endoscope lens 6 passes through the limiting ring 14 and extends into the sleeve hole 13, and the flexible circuit board 9 is inserted into the guide tube.

[0060] The light source 7 and the rigid circuit board 8 can be fixed by welding, and the circuit of the light source 7 is fixed by welding to the rigid circuit board 8 to achieve electrical conduction. The electronic endoscope lens 6 and the flexible circuit board 9 are fixed by welding, such as the electronic endoscope lens 6 and the flexible circuit board 9 are welded by solder balls 15, and the circuit of the electronic endoscope lens 6 is also fixed by welding to the flexible circuit board 9 to achieve electrical connection.

[0061] In one embodiment, if Figures 1 to 18As shown, the installation process of the guide tube and the head end seat in step S2 is as follows: prepare the outer sleeve 4 and the inner sleeve 5 as the guide tube, insert the inner sleeve 5 into and fix it in the sleeve hole 13, sleeve the flexible circuit board 9 in the inner sleeve 5, then sleeve the head end of the outer sleeve 4 on the inner sleeve 5 and fix it, the head end of the outer sleeve 4 abuts and fixes with the head end seat 1, and the lines of the rigid circuit board 8 and the flexible circuit board 9 are led out from the tail end of the outer sleeve 4 and connected to the test board 2. The lines of the rigid circuit board 8 and the flexible circuit board 9 can be straightened together to form a wiring harness 10, and then the wiring harness 10 extends out of the guide tube and is electrically connected to the test board 2. The rigid circuit board 8 and the limit ring 14 are fixed by glue.

[0062] In one embodiment, if Figures 1 to 18 As shown, the inner sleeve 5 is bonded to the sleeve hole 13 by glue, the outer sleeve 6 is bonded to the inner sleeve 5 by glue, and the outer sleeve 4 and the head end seat 1 are bonded at the abutment by glue.

[0063] In one embodiment, if Figures 1 to 18 As shown, the light source 7 is an LED light source. Of course, the light source 7 can also be other cold light sources.

[0064] In one embodiment, if Figures 1 to 18 As shown, the following are specific steps for making an electronic endoscope with a viewing angle.

[0065] Step 1: Solder and fix the LED light source to the rigid circuit board 8, and solder the LED wiring harness 10;

[0066] Step 2: The electronic endoscope lens 6 is welded and fixed to the flexible circuit board 9;

[0067] Step 3: The electronic endoscope lens 6 passes through the through hole of the rigid circuit board 8 and is fixed to the rigid circuit board 8;

[0068] Step 4: Then the rigid circuit board 8 is inserted into the mounting hole 12 of the head end seat 1 until it contacts the limiting ring 14, and then fixed;

[0069] Step 5: Welding the flexible circuit board 9 to the wiring harness 10;

[0070] Step 6: Install the inner sleeve 5, and bond the inner sleeve 5 to the head end seat 1 by glue;

[0071] Step 7: Install the outer sleeve 6, the outer sleeve 6 is bonded to the inner sleeve 5 by glue, and the outer sleeve 6 is bonded to the head end seat 1 by glue;

[0072] Step 8: The wire harness 10 passes through the tail ends of the inner sleeve 5 and the outer sleeve 6 and is welded to the test board 2 and the female header 3.

[0073] In one embodiment, if Figures 1 to 18As shown, the electronic endoscope lens 6 can be a wafer-level WLO lens or a traditional injection-molded or molded lens, without limiting the specific type.

[0074] In one embodiment, if Figures 1 to 18 As shown, the head end seat 1 can be made of CNC-processed metal or plastic material, mold-processed metal or plastic material, or 3D-printed metal or plastic material, and the type and material of the head end seat 1 are not limited.

[0075] In one embodiment, if Figures 1 to 18 As shown, the design parameters of each component of the electronic endoscope with viewing angle are provided as a reference.

[0076] The length, width and height of the electronic endoscope lens 6 are B1, B2 and H1 respectively. Considering the size fluctuation of the electronic endoscope lens 6 and the size fluctuation of the rigid circuit board 8, the opening A1 of the rigid circuit board 8 is B1+0.05~0.4mm, and A2 is B2+0.05~0.4mm. The diameter D1 of the rigid circuit board 8 should ensure that the LED light source is completely wrapped. The thickness H2 of the rigid circuit board 8 is generally selected to be 0.25~0.4mm, and the height H3 of the LED light source is generally selected to be 0.15~2mm. The opening D2 of the head end seat 1 is D1+0.1mm of the rigid circuit board 8, the wall thickness C1 of the head end seat 1 is generally selected to be 0.05~0.2, the D4 of the head end seat 1 is ≥H1*SIN(E)+A1, the angle E is generally selected to be 5~40 degrees, and the maximum outer diameter D3 of the head end seat 1 is D4+C1*2. The outer diameter D5 of the inner sleeve 5 should be slightly smaller than the D4 of the head end seat 1 to facilitate assembly and meet the waterproof requirements of the endoscope. The inner diameter D6 of the outer sleeve 4 should be slightly larger than the outer diameter D5 of the inner sleeve 5, and the outer diameter D7 of the outer sleeve 4 should be consistent with the size D3 of the head end seat 1.

[0077] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An electronic endoscope with a viewing angle, characterized in that: It includes a head end seat, a guide tube and a test board, the head end seat is installed at the head end of the guide tube, an electronic endoscope module is installed in the head end seat, the electronic endoscope module includes an electronic endoscope lens, a light source and a circuit board, the axis of the electronic endoscope lens and the axis of the head end seat have a preset angle, the electronic endoscope lens, the light source and the circuit board are electrically connected, the circuit of the circuit board extends out through the tail end of the guide tube and is electrically connected to the test board, and a female header for connection to a pin header is provided on the test board.

2. The electronic endoscope with a viewing angle according to claim 1, characterized in that: The circuit board includes a rigid circuit board and a flexible circuit board. The rigid circuit board is provided with a through hole and a light source mounting position for mounting the light source. The light source is electrically connected to the rigid circuit board. The electronic endoscope lens passes through the through hole and is fixedly connected to the rigid circuit board. The electronic endoscope lens is electrically connected to the flexible circuit board. The flexible circuit board extends into the guide tube. The circuits of the rigid circuit board and the flexible circuit board extend through the tail end of the guide tube.

3. The electronic endoscope with a viewing angle according to claim 2, characterized in that: The head end and the tail end of the head end seat are respectively provided with a mounting hole and a sleeve hole, the mounting hole and the sleeve hole are connected to each other, a limiting ring is provided between the mounting hole and the sleeve hole, the rigid circuit board is located in the mounting hole, the rigid circuit board abuts and is fixed to the limiting ring, and the electronic endoscope lens passes through the limiting ring and extends into the sleeve hole.

4. The electronic endoscope with a viewing angle according to claim 3, characterized in that: The guide tube comprises an inner sleeve and an outer sleeve, one end of the inner sleeve is sleeved and fixed in the sleeve hole, the other end of the inner sleeve is sleeved and fixed in the outer sleeve, and the outer sleeve is abutted and fixed to the head end seat.

5. The electronic endoscope with a viewing angle according to claim 2, characterized in that: The light source is an LED light source.

6. A method for manufacturing an electronic endoscope with a viewing angle, characterized in that: The following steps are involved: S1. Prepare a test board with a female connector and a head end seat with an electronic endoscope module installed therein, wherein the electronic endoscope module comprises an electronic endoscope lens, a light source and a circuit board, wherein the electronic endoscope lens and the light source are electrically connected to the circuit board, and the axis of the electronic endoscope lens and the axis of the head end seat have a preset angle; S2. Prepare a guide tube, install the head end seat on the head end of the guide tube, extend the circuit of the circuit board into the guide tube, and then extend it from the tail end of the guide tube to connect with the test board.

7. The method for manufacturing an electronic endoscope with a viewing angle according to claim 6, characterized in that: The process of making the head end seat with the electronic endoscope module installed in step S1: Prepare a head end seat, a rigid circuit board, a light source, a flexible circuit board and an electronic endoscope lens, wherein the head end and the tail end of the head end seat are respectively provided with a mounting hole and a sleeve hole, the mounting hole and the sleeve hole are interconnected, a limiting ring is provided between the mounting hole and the sleeve hole, and a through hole and a light source mounting position are provided on the rigid circuit board; Fix the light source on the light source mounting position, electrically connect the light source to the rigid circuit board, electrically connect and fix the electronic endoscope lens to the flexible circuit board, pass the electronic endoscope lens through the through hole, and then fix the electronic endoscope lens on the rigid circuit board, insert the rigid circuit board into the mounting hole, abut and fix the rigid circuit board to the limiting ring, and insert the flexible circuit board into the guide tube.

8. The method for manufacturing an electronic endoscope with a viewing angle according to claim 7, characterized in that: The installation process of the guide tube and the head end seat in step S2: prepare an outer sleeve and an inner sleeve as the guide tube, insert the inner sleeve into and fix it in the sleeve hole, sleeve the flexible circuit board in the inner sleeve, and then sleeve the head end of the outer sleeve on the inner sleeve and fix it, the head end of the outer sleeve abuts and fixes against the head end seat, and the circuits of the rigid circuit board and the flexible circuit board are led out from the tail end of the outer sleeve and connected to the test board.

9. The method for manufacturing an electronic endoscope with a viewing angle according to claim 8, characterized in that: The inner sleeve is bonded to the sleeve hole by glue, the outer sleeve is bonded to the inner sleeve by glue, and the outer sleeve and the head end seat are bonded at the abutment point by glue.

10. The method for manufacturing an electronic endoscope with a viewing angle according to claim 8, characterized in that: The light source adopts LED light source.

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