3D electronic endoscope

Abstract

The utility model relates to a 3D electronic endoscope which comprises a hard tube and a front end base arranged at the front end of the hard tube, an inclined face is arranged at the front end of the front end base, a lens light window is arranged in the middle of the inclined face, and light source light windows are arranged on the upper side and the lower side of the lens light window respectively. An imaging module and an optical fiber module are arranged in the front-end base, the imaging module comprises two objective lenses which are distributed left and right and have parallel main optical axes, and the lens ends of the two objective lenses directly face a lens light window; the pair of optical fiber modules is distributed on the upper side and the lower side of the imaging module, and the optical fiber end faces of the pair of optical fiber modules are tightly attached to the light source light window. According to the utility model, the structure design is reasonable, the independent imaging module is matched with the two optical fiber modules, the binocular focusing precision is improved, the stray light is reduced, and the image quality is improved, so that the undesirable phenomenon that people are dizzy due to the binocular focusing precision and the stray light directly or indirectly is reduced or eliminated.

Description

Technical fields:

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a 3D electronic endoscope. Background technology:

[0002] With the development of technology, the application of endoscopes in the medical industry is becoming increasingly widespread. They provide the most direct understanding of internal lesions and can be used in conjunction with microsurgical scalpels for minimally invasive surgery. Compared to traditional surgery, endoscopic minimally invasive surgery has advantages such as less trauma, faster recovery, less pain, and fewer complications, making it popular among medical institutions and patients alike.

[0003] With the maturity of 3D technology, 3D electronic endoscopes have emerged. These endoscopes provide stereoscopic images, allowing doctors to more accurately determine tissue structure and depth, thereby improving surgical precision and safety. Simultaneously, the stereoscopic images from 3D endoscopes can more realistically reflect the internal condition of the human body, reducing visual fatigue and cognitive burden on doctors during surgery and improving surgical efficiency. However, existing 3D electronic endoscopes often cause dizziness, which can affect the surgical process. Therefore, how to reduce or eliminate dizziness caused by 3D electronic endoscopes has become an urgent technical problem to be solved, leading to this case study. Utility model content:

[0004] This invention addresses the problems existing in the prior art by providing a 3D electronic endoscope.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a 3D electronic endoscope, comprising a rigid tube and a front end base disposed at the front end of the rigid tube, wherein the front end base is provided with an inclined surface, a lens aperture is provided in the middle of the inclined surface, and light source apertures are respectively provided on the upper and lower sides of the lens aperture; an imaging module and an optical fiber module are disposed inside the front end base, wherein the imaging module includes two objective lenses distributed on the left and right with parallel principal optical axes, and the lens ends of the two objective lenses are directly opposite the lens aperture; the optical fiber modules are a pair, distributed on the upper and lower sides of the imaging module, and the optical fiber end faces of the pair of optical fiber modules are in close contact with the light source apertures.

[0006] Furthermore, the imaging module also includes a lens mount and an image sensor. The lens mount has a pair of lens mounting holes distributed on the left and right, and a sensor mounting slot is provided at the rear end of the lens mount. A pair of objective lenses are respectively installed in the pair of lens mounting holes, and the image sensor is installed in the sensor mounting slot.

[0007] Furthermore, the objective lens is a lens with a 30° viewing angle, and the objective lens is blackened except for the light-transmitting aperture surface.

[0008] Furthermore, the objective lens is made of black PC.

[0009] Furthermore, the upper and lower ends of the lens mounting hole are provided with slots for clamping and adjusting the lens image.

[0010] Furthermore, the front base is provided with a mounting groove for mounting a lens mount, and the inclined surface is provided with two lens through holes distributed on the left and right for accommodating the objective lens. The two lens through holes are connected to the mounting groove, and a first light window mounting groove is provided around the front end of the two lens through holes. The lens light window is installed in the first light window mounting groove.

[0011] Furthermore, the upper and lower ends of the front-end base are respectively provided with optical fiber through holes, the optical fiber through holes include a front section through hole and a rear section through hole, the axis of the front section through hole is perpendicular to the inclined plane, and the axis of the rear section through hole is parallel to the axis of the front-end base; a second optical window mounting groove is provided around the front end of the optical fiber through hole, and the light source optical window is installed in the second optical window mounting groove.

[0012] Furthermore, a light-blocking plate is provided between the imaging module and the lens aperture, with both ends of the light-blocking plate in close contact with the lens aperture and the lens end face of the imaging module, respectively.

[0013] Furthermore, the light-blocking sheet is a circular black Mylar sheet.

[0014] Furthermore, both the light source window and the lens window are made of sapphire lenses, and the inside of the lens window is coated with an anti-reflective film.

[0015] Compared with the prior art, the present invention has the following effects: The present invention has a reasonable structural design. By combining an independent imaging module with two fiber optic modules, it improves the binocular focusing accuracy, reduces stray light, and enhances image quality, thereby reducing or eliminating the adverse phenomenon of dizziness caused directly or indirectly by binocular focusing accuracy and stray light. Attached image description:

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the front cross-sectional structure of an embodiment of the present utility model;

[0018] Figure 3 yes Figure 2 A is an enlarged schematic diagram;

[0019] Figure 4 This is a three-dimensional structural diagram of the imaging module in an embodiment of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the front-end base in an embodiment of this utility model. Figure 1 ;

[0021] Figure 6 This is a three-dimensional structural diagram of the front-end base in an embodiment of this utility model. Figure 2 .

[0022] In the picture:

[0023] 1-Front-end base; 2-Light source window; 3-Lens window; 4-Rigid tube; 5-Imaging module; 6-Fiber optic module; 7-Light baffle; 8-Objective lens; 9-Lens mount; 10-Image sensor; 11-Lens mounting hole; 12-Gutter; 13-Mounting slot; 14-Lens through hole; 15-First light window mounting slot; 16-Fiber optic through hole; 17-Second light window mounting slot; 18-Sloping surface. Detailed implementation method:

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] like Figures 1-6 As shown, this utility model discloses a 3D electronic endoscope with a viewing angle of 30°. Specifically, it includes a rigid tube 4, a front-end base 1, an imaging module 5, and an optical fiber module 6. The front-end base 1 is located at the front end of the rigid tube 4. A slope 18 is provided at the front end of the front-end base 1, and a lens window 3 is provided in the middle of the slope 18. Light source windows 2 are respectively provided on the upper and lower sides of the lens window 3. The imaging module 5 and the optical fiber module 6 are arranged inside the front-end base 1. The imaging module 5 includes two objective lenses 8 distributed left and right with parallel principal optical axes. The lens ends of the two objective lenses 8 are directly opposite the lens window 3. The optical fiber modules 6 are a pair, distributed on the upper and lower sides of the imaging module 5, with the fiber end faces of the pair of optical fiber modules 6 in close contact with the light source windows 2. The structure is reasonable, relatively easy to assemble, and has high assembly precision, resulting in high production efficiency and effectively meeting the requirements for cost reduction in production.

[0027] In this embodiment, the imaging module 5 further includes a lens mount 9 and an image sensor 10. The lens mount 9 is rectangular and has a pair of left and right distributed lens mounting holes 11. The rear end of the lens mount 11 is provided with a sensor mounting groove. A pair of objective lenses 8 are respectively installed in the pair of lens mounting holes 11, and the front end of the objective lenses extends out of the lens mounting holes. The image sensor 10 is installed in the sensor mounting groove. The distance between the objective lens 8 and the image sensor 10 is determined by image adjustment.

[0028] In this embodiment, the principal optical axes of the two objective lenses 8 are parallel and their viewing angles are consistent. Furthermore, the objective lenses are lenses with a 30° viewing angle.

[0029] In this embodiment, the objective lens 8 is coated with black except for the light-transmitting aperture surface to reduce the influence of stray light.

[0030] In this embodiment, the objective lens 8 is made of black PC to reduce the influence of stray light.

[0031] In this embodiment, the upper and lower ends of the lens mounting hole 11 are provided with slots 12 for clamping the lens and adjusting the image.

[0032] In this embodiment, the front-end base 1 is cylindrical in shape, and an mounting groove 13 for mounting the lens mount 9 is provided inside the front-end base 1. The circumferential dimension of the mounting groove is adapted to the outer dimension of the lens mount 9, and the end is a circular countersunk hole for assembly clearance of the imaging module 5. The inclined surface 18 has two lens through holes 14 distributed on the left and right for accommodating the objective lens 8. The inner diameter of the lens through holes is larger than the outer diameter of the objective lens to avoid the objective lens 8. The two lens through holes 14 are connected to the mounting groove, and a first light window mounting groove 15 is provided around the front end of the two lens through holes 14. The lens light window 3 is installed in the first light window mounting groove 15.

[0033] In this embodiment, a glue storage tank is provided on the periphery of the first light window mounting groove 15 to facilitate glue fixation.

[0034] In this embodiment, fiber optic through holes 16 are respectively provided at the upper and lower ends of the inclined surface 18 of the front base 1. The fiber optic through hole 16 includes a front section through hole and a rear section through hole. The axis of the front section through hole is perpendicular to the inclined surface and transitions through an arc. The axis of the rear section through hole is parallel to the axis of the front base. A second optical window mounting groove 17 is provided around the front end of the fiber optic through hole 16. The light source optical window 2 is installed in the second optical window mounting groove 17.

[0035] In this embodiment, both the rear end of the front base 1 and the front end of the rigid tube are provided with assembly stops to facilitate assembly and tight fit between the two.

[0036] In this embodiment, a light-blocking plate 7 is provided between the imaging module 5 and the lens aperture 3, with both ends of the light-blocking plate 7 in close contact with the lens aperture 3 and the lens end face of the imaging module 5, respectively. Preferably, the light-blocking plate is a circular black Mylar plate used to block excess light and reduce the influence of stray light.

[0037] In this embodiment, the light source window 2 is a rectangular sapphire lens.

[0038] In this embodiment, all lens windows 3 are sapphire lenses, and the inside of the lens windows 3 is coated with an anti-reflection film to reduce the influence of stray light.

[0039] In this embodiment, the image sensor 10 consists of two CCDs on the same PCB.

[0040] In this embodiment, the rigid tube 4 is a seamless steel tube.

[0041] It should be noted that the viewing angle can be designed from 15° to 70° by adjusting the viewing angle requirements of the endoscope.

[0042] In this embodiment, the assembly sequence of the 3D electronic rigid endoscope is as follows:

[0043] Step S1: Fix the image sensor 10 to the sensor mounting slot at the rear end of the lens mount 9 with glue, and then install and adjust the two objective lenses 8 respectively, and fix them with glue.

[0044] Step S2: Apply glue to the first and second light window mounting slots of the front base 1 respectively, install the light source light window 2 and the lens light window 3, cure, and clean;

[0045] Step S3: Install the light-blocking plate 7 into the lens mounting hole, with one end tightly against the lens aperture 3, and then install the imaging module 5 into the mounting slot of the front base 1. The lens bevel of the imaging module 5 is tightly against the light-blocking plate 7 and fixed with glue.

[0046] Step S4: Install the fiber optic module 6 into the fiber optic through hole of the front-end base 1, with the fiber end face of the fiber optic module in close contact with the fiber optic window 2, and fix it with glue;

[0047] Step S5: Finally, fit the rigid tube 4 onto the outer circle of the front base 1 and weld it.

[0048] The advantages of this invention are as follows: By using an independent imaging module, image adjustment can be completed quickly and with high precision; the aperture and front-end base are fixed with adhesive, allowing for rapid installation; the light-blocking plate is tightly attached to the lens aperture and imaging module, facilitating assembly and positioning; and the front-end base and rigid tube are assembled using a stop joint, making installation and positioning easy. Overall, this invention has a reasonable structure, relatively easy assembly, and high binocular focusing accuracy. Furthermore, by reducing stray light, it effectively alleviates the dizzying effect.

[0049] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0050] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0051] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A 3D electronic endoscope, comprising a rigid tube and a front base disposed at the front end of the rigid tube, characterized in that: The front end of the front base has an inclined surface, and a lens window is provided in the middle of the inclined surface. Light source windows are provided on the upper and lower sides of the lens window. An imaging module and an optical fiber module are provided inside the front end base. The imaging module includes two objective lenses distributed on the left and right with parallel principal optical axes. The lens ends of the two objective lenses are directly opposite the lens window. The optical fiber modules are a pair, distributed on the upper and lower sides of the imaging module. The optical fiber end faces of the pair of optical fiber modules are in close contact with the light source windows.

2. The 3D electronic endoscope according to claim 1, characterized in that: The imaging module also includes a lens mount and an image sensor. The lens mount has a pair of lens mounting holes distributed on the left and right, and a sensor mounting slot is provided at the rear end of the lens mount. A pair of objective lenses are respectively installed in the pair of lens mounting holes, and the image sensor is installed in the sensor mounting slot.

3. The 3D electronic endoscope according to claim 2, characterized in that: The objective lens is a lens with a 30° viewing angle, and the objective lens is blackened except for the light-transmitting aperture surface.

4. The 3D electronic endoscope according to claim 2, characterized in that: The objective lens is made of black PC.

5. The 3D electronic endoscope according to claim 2, characterized in that: The lens mounting hole has slots at both the upper and lower ends on its periphery for clamping and adjusting the lens image.

6. The 3D electronic endoscope according to claim 2, characterized in that: The front base has an internal mounting groove for mounting a lens mount. The inclined surface has two lens through holes distributed on the left and right for accommodating the objective lens. The two lens through holes are connected to the mounting groove. A first light window mounting groove is provided around the front end of the two lens through holes. The lens light window is installed in the first light window mounting groove.

7. The 3D electronic endoscope according to claim 2, characterized in that: The upper and lower ends of the front base are respectively provided with optical fiber through holes. The optical fiber through holes include a front section through hole and a rear section through hole. The axis of the front section through hole is perpendicular to the inclined plane, and the axis of the rear section through hole is parallel to the axis of the front base. A second optical window mounting groove is provided around the front end of the optical fiber through hole, and the light source optical window is installed in the second optical window mounting groove.

8. The 3D electronic endoscope according to claim 1, characterized in that: A light-blocking plate is provided between the imaging module and the lens aperture, with both ends of the light-blocking plate in close contact with the lens aperture and the lens end face of the imaging module, respectively.

9. The 3D electronic endoscope according to claim 8, characterized in that: The light-blocking sheet is a circular black Mylar sheet.

10. The 3D electronic endoscope according to claim 1, characterized in that: Both the light source window and the lens window are made of sapphire lenses, and the inside of the lens window is coated with an anti-reflective coating.

Images