An endoscope distal end light mixing system and an endoscope

Abstract

The present invention relates to the field of medical devices, and provides an endoscope head-end light mixing system and an endoscope. Among them, the endoscope head-end light mixing system includes an annular groove provided at the head end of the mirror body. A first circuit board and a second circuit board are arranged back to back in the annular groove. A plurality of LED lights with different spectra are connected to both the first circuit board and the second circuit board. The LED lights on the first circuit board and the second circuit board are arranged in pairs in the height direction; a plurality of arc-shaped light guide rings corresponding to the LED lights are also stacked up and down in the annular groove. Both ends of each light guide ring are open, and the openings at both ends of each light guide ring are respectively opposite to a pair of two LED lights. The present invention can uniformly emit the light radiation energy of LED lights with different spectra at the head end of the mirror body, and the spectral waveforms within the entire illumination range are stable and without difference; by adjusting the current magnitudes of each group of LEDs, the configuration and intensity of the output spectrum can be arbitrarily adjusted, realizing the same illumination mode and dimming logic as the existing cold light source.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to an endoscope head-end light mixing system and an endoscope. Background Art

[0002] The illumination system of a typical digestive tract electronic endoscope provides light radiation energy by a cold light source, and transmits it to the front end of the endoscope body through a light guide optical cable in the endoscope body to illuminate the detected body cavity. This technical solution has three important defects: First, the low reliability brought by the physical characteristics of the light guide optical cable. During the long-term use of the endoscope body, repeated bending will cause a large number of optical fiber filaments to break, resulting in a serious decrease in the output light flux, and the optical cable needs to be replaced for maintenance. The industry average replacement cycle is one to one and a half years. Second, this solution has a high cost and poor economy. The cold light source, the endoscope body optical cable, and the beam expander lens can account for more than one-third of the material cost of the entire system. Third, this solution has poor optical efficiency and high total power consumption. In order to provide sufficient illumination at the detection end, the power of the xenon lamp cold light source is usually greater than 300W, and the power of the LED cold light source is also above 100W. This not only poses a high requirement for the emergency power supply power of medical equipment, but also the active heat dissipation system inside the cold light source brings noise problems.

[0003] With the rise of disposable digestive tract electronic endoscopes, the disposable digestive tract electronic endoscope directly provides light radiation energy by the LED at the head end of the endoscope body, and the low-cost solution without a cold light source and a light guide optical cable begins to be popularized. This solution can effectively solve the defects of the aforementioned endoscope illumination system, but it has not been popularized outside disposable endoscopes. The main reason is that this solution can only provide a single white light spectrum and cannot provide the synthetic spectrum required for the electronic staining function. And the electronic staining function is one of the necessary functions for early cancer screening. Without this function, only ordinary examinations can be performed.

[0004] Therefore, those skilled in the art are committed to developing an endoscope head-end light mixing system and an endoscope that do not require a cold light source but can provide a synthetic spectrum. Summary of the Invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an endoscope head-end light mixing system and an endoscope that do not require a cold light source but can provide a synthetic spectrum.

[0006] To achieve the above object, the present invention provides an endoscope head-end light mixing system, including an annular groove provided at the head end of the endoscope body. Two first circuit boards and second circuit boards are arranged back to back in the annular groove. A plurality of LED lights with different spectra are connected to both the first circuit board and the second circuit board. The LED lights on the first circuit board and the second circuit board are arranged in pairs in the height direction, and a pair of LED lights at the same height have the same spectrum;

[0007] The annular groove also has several arc-shaped light guide rings corresponding to the LED lights stacked up and down, each of which has openings at both ends, and the openings at both ends of each light guide ring are respectively opposite to the two LED lights in a pair. When the present invention is in use, the optical cable connection of the cold light source is eliminated, and the light output of the LED light can be directly adjusted by the current, which is simple to install and use; at the same time, a plurality of LED lights with different spectra are used in combination to synthesize a mixed spectrum, which can be used not only for ordinary inspections but also for early cancer screening when used in an endoscope, and can achieve the same lighting mode and dimming logic as the existing cold light source.

[0008] Preferably, the inner wall of the annular groove is made of a material with high reflectivity in the visible light band, so that the light radiation energy of different LED lamps can be collected by the reflection cavity of the annular groove to achieve uniform illumination at the head end of the mirror body.

[0009] Preferably, the bottom of the annular groove is provided with a wiring hole, and the first circuit board and the second circuit board are inserted into the wiring hole. The first circuit board and the second circuit board can be arranged as a PCB row plug structure, which is not only convenient for installation, but also more convenient for replacement or maintenance.

[0010] Preferably, the LED lamps on the first circuit board and the second circuit board are provided with a minimum spacing in the height direction according to the LED lamp specifications. In the present invention, no matter what kind of LED lamp is used, adjacent LED lamps are provided within the minimum allowable distance according to the selected LED parameter specifications, so that the depth of the annular groove (i.e., the reflective cavity) can be minimized to maximize the luminous efficiency.

[0011] Preferably, the side of the LED lamp opposite to the light guide ring is parallel to the corresponding end face of the light guide ring, and the light guide ring is parallel to the end surface of the lens body. This arrangement enables the light guide ring to obtain the maximum coupling efficiency and at the same time ensures that the brightness of the exit window is uniform.

[0012] Preferably, the bottom of the light guide ring is provided with uneven overflow points, which can destroy the plane of the light guide ring, so that the light radiation of the LED can be uniformly emitted in the entire annular area.

[0013] Preferably, the top of the annular groove is covered with a cover plate, and the cover plate is made of a light diffusion material to eliminate the difference in light distribution at different positions and achieve uniform brightness of the head-end lighting.

[0014] Preferably, the light-guiding ring is made of a transparent material in the visible light band, and can guide light to the head end of the mirror body to achieve a light-guiding effect.

[0015] Preferably, the overflow point is a pit or a protrusion.

[0016] The present invention also provides an endoscope, comprising the endoscope head end light mixing system as described above.

[0017] The beneficial effects of the present invention are as follows: The present invention can evenly emit the radiation energy of LED lights with different spectra at the head end of the mirror body, and the spectral waveforms within the entire illumination range are stable and have no differences; by adjusting the current magnitudes of each group of LEDs, the configuration and intensity of the output spectrum can be arbitrarily adjusted to achieve the same illumination mode and dimming logic as existing cold light sources; it breaks through the limitation that the existing electronic endoscope system cannot use synthetic spectra without a cold light source solution, and can generate uniform mixed-spectrum illumination that meets the function of electronic staining; it can effectively replace the existing cold light source plus light guide cable solution, not only significantly reducing the product material cost, but also extending the average maintenance cycle of the mirror body. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a specific embodiment of the present invention.

[0019] Figure 2 It is a schematic structural diagram of a specific embodiment of the present invention with the light guide ring removed.

[0020] Figure 3 It is a schematic structural diagram of the bottom of the light guide ring of a specific embodiment of the present invention. Specific Embodiment

[0021] The present invention will be further described below in conjunction with the drawings and embodiments. It should be noted that in the description of the present invention, the orientation or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific manner, and therefore cannot be construed as a limitation of the present invention. Terms such as "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] Such as Figure 1 And Figure 2As shown in the figure, an endoscope head-end light mixing system includes an annular groove 1 provided at the head end of the mirror body. In the annular groove 1, a first circuit board 21 and a second circuit board 22 are arranged back to back. In this embodiment, a wiring hole is provided at the bottom of the annular groove 1. The first circuit board 21 and the second circuit board 22 are inserted into the wiring hole. Through the plug-in connection, the connection between the first circuit board 21 and the second circuit board 22 and the internal circuit of the endoscope can be conveniently realized, and at the same time, it is also convenient for maintenance and replacement. In other embodiments, the first circuit board 21 and the second circuit board 22 can also be welded to the internal circuit board as long as the connection can be achieved. The first circuit board 21 and the second circuit board 22 are arranged vertically back to back, and the side facing away from each other is set as the electrical component connection surface. A plurality of LED lights 3 of different spectra are connected to the electrical component connection surfaces of the first circuit board 21 and the second circuit board 22. The light radiation energy of different LED lights 3 is collected by the annular deep groove, that is, the annular groove reflection cavity, and the illuminance is realized at the head end of the mirror body. The LED lights 3 on the first circuit board 21 and the second circuit board 22 are arranged in pairs in the height direction, and a pair of LED lights at the same height have the same spectrum, so that two LED lights of the same spectrum can be connected to the same light guide ring 4, improving the freedom of dimming. In order to obtain the maximum coupling efficiency, the LED lights 3 on the first circuit board 21 and the second circuit board 22 are set at the minimum spacing according to the LED light specifications in the height direction, that is, in the height direction, the distance between the LED lights 3 on the first circuit board 21 and the second circuit board 22 is the minimum adjacent distance allowed by the LED lights of this specification. In this embodiment, the selected LED light specifications are the same, so in this embodiment, the LED lights 3 are arranged at equal intervals and evenly distributed. Through the foregoing settings, the distance between the LED lights can be minimized, thereby reducing the depth of the annular groove and improving the luminous efficiency of the LED lights. In this patent, for the convenience of understanding and showing the structure of the present invention, in the attached Figure 1 drawing and the attached Figure 2 drawing, part of the outer shell at the endoscope head end is not shown.

[0023] Inside the annular groove 1, there are also several arc-shaped light guide rings 4 stacked up and down corresponding to the LED lights. The light guide rings 4 are made of a visible light band transparent material. Both ends of each light guide ring 4 are open, and the openings at both ends of each light guide ring 4 are respectively opposite to a pair of two LED lights. The end of the light guide ring 4 can be closely attached to the LED light 3, enabling the LED light to more effectively introduce light into the light guide ring 4 and reducing light efficiency loss. Based on the foregoing design, LEDs of different spectra can uniformly emit their light radiation energy at the head end of the mirror body. By adjusting the current magnitude of each group of LEDs, the configuration and intensity of the output spectrum can be arbitrarily adjusted to achieve the same lighting mode and dimming logic as existing cold light sources. In this embodiment, the surface of the LED light 3 opposite to the light guide ring 4 is also parallel to the corresponding end face of the light guide ring 4, and the light guide ring 4 is parallel to the surface of the head end of the mirror body. In the prior art, since most circuit boards are flat plates and LED lights are square, to achieve the foregoing setting, only the first circuit board 21 and the second circuit board 22 need to be vertically inserted into the head end of the mirror body, and the LED lights are installed perpendicular to the circuit board. Additionally, by making the bottom surface of the annular groove 1 parallel to the head end of the mirror body and placing the light guide ring 4 therein, it is convenient to ensure that the light guide ring 4 is parallel to the surface of the head end of the mirror body. With such a setting, the light guide ring 4 obtains the maximum coupling efficiency, and at the same time, the illumination is also made uniform.

[0024] In this embodiment, the inner wall of the annular groove 1 is made of a high reflectivity material in the visible light band, specifically, it can be a PET reflective film or titanium dioxide sprayed, so that the light radiation energy of different LED lights is collected by the reflection cavity of the annular groove 1 and the illuminance is made uniform at the head end of the mirror body.

[0025] As Figure 3 shown, uneven light overflow points 41 are provided at the bottom of the light guide ring 4, which can destroy the plane of the light guide ring 4, enabling the light radiation energy of the LED to be uniformly emitted in the entire annular region. The light overflow points 41 are pits or protrusions. A cover plate 5 is provided on the top of the annular groove 1. The cover plate 5 is made of a light diffusing material, such as a PC base diffusing material, to eliminate the light distribution differences at different positions and achieve uniform brightness of the head end illumination, that is, the brightness is the same when observed from all directions.

[0026] The present invention also provides an endoscope, including the endoscope head end light mixing system as described above.

[0027] When the present invention is used, the types, numbers of LED lights and the number of light guide ring layers can be increased or decreased according to needs. In this embodiment, only three layers of light guide rings and three pairs of LED lights are provided, which does not constitute a limitation to this patent.

[0028] When this patent is in use, LED lights of different spectra can evenly emit their light radiation energy at the head end of the mirror body, and the spectral waveforms within the entire illumination range are stable and without differences. By adjusting the current magnitudes of each group of LEDs, the configuration and intensity of the output spectrum can be arbitrarily adjusted, achieving the same illumination mode and dimming logic as existing cold light sources. Thus, the present invention breaks through the limitation that the existing electronic endoscope system cannot use synthetic spectra without a cold light source solution, and can generate a uniform mixed-spectrum illumination that meets the function of electronic staining. It can effectively replace the existing cold light source plus light guide cable solution, not only significantly reducing the product material cost, but also extending the average maintenance cycle of the mirror body, and having high commercial value.

[0029] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the existing technology should fall within the protection scope determined by the claims.

Claims

1. An endoscopic lens end light mixing system, characterized in that: It includes an annular groove (1) provided at the head end of the lens body. In the annular groove (1), there are two first circuit boards (21) and second circuit boards (22) arranged back to back. A plurality of LED lights (3) with different spectra are connected to both the first circuit board (21) and the second circuit board (22). The LED lights (3) on the first circuit board (21) and the second circuit board (22) are arranged in pairs in the height direction, and the spectra of a pair of LED lights at the same height are the same. In the annular groove (1), there are also several arc-shaped light guide rings (4) stacked up and down corresponding to the LED lights. Both ends of each light guide ring (4) are open, and the openings at both ends of each light guide ring (4) are respectively opposite to a pair of two LED lights. Uneven light overflow points (41) are provided at the bottom of the light guide ring (4), which can destroy the plane of the light guide ring, so that the light radiation energy of the LED can be evenly emitted in the entire annular area. A cover plate (5) is provided on the top of the annular groove (1). The cover plate (5) is made of a light diffusing material, which eliminates the light distribution difference at different positions and realizes uniform brightness of the head end illumination.

2. The endoscope lens end light mixing system according to claim 1, characterized in that: The inner wall of the annular groove (1) is made of a material with a high reflectivity in the visible light band.

3. The endoscopic lens end light mixing system according to claim 1, characterized in that: A wiring hole is provided at the bottom of the annular groove (1), and the first circuit board (21) and the second circuit board (22) are inserted into the wiring hole.

4. The endoscope lens end light mixing system according to claim 1, characterized in that: The LED lights (3) on the first circuit board (21) and the second circuit board (22) are set with a minimum spacing in the height direction according to the specifications of the LED lights.

5. The endoscope lens end light mixing system according to claim 1, characterized in that: The surface of the LED light (3) opposite to the light guide ring (4) is parallel to the corresponding end face of the light guide ring (4); the light guide ring (4) is parallel to the surface of the head end of the lens body.

6. The endoscope lens end light mixing system according to claim 1, characterized in that: The light guide ring (4) is made of a transparent material in the visible light band.

7. The endoscope lens end light mixing system according to claim 1, characterized in that: The light overflow point (41) is a concave pit or a protrusion.

8. An endoscope, characterized in that: It includes an endoscope head end light mixing system as described in any one of claims 1 to 7.

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