技术领域technical field
本发明属于医疗器械技术领域，涉及一种电子内窥镜，特别是一种内窥镜头端部结构。The invention belongs to the technical field of medical instruments, and relates to an electronic endoscope, in particular to an end structure of an endoscope lens.
背景技术Background technique
电子内窥镜是一种具有细长挠性插入部并在其前端设置有摄像装置可以插入体腔内获取腔内场景图像的装置，它通过与内窥镜系统其它设备连接，可实现腔内场景图像的实时输出显示。插入部的前端具有弯曲部，能够通过操作部的手轮操作来改变头端部观察窗的观察方向。且具有手术器械通道，能将规定的部分器械穿过此通道进行手术操作。内窥镜在头端部设计有具有物镜光学系统的摄像光学单元，且在物镜光学系统邻近处设计有为物镜系统提供照明的照明光学系统。由于照明光学系统和物镜光学系统相隔较近，照明光学系统中部分杂散光会直接进入到物镜光学系统中，导致物镜光学系统成像异常，时常出现图像过亮、发白，导致图像不清晰，影响操作者观察及手术操作。另外，在头端部设计有水气喷嘴来对物镜系统的最外层镜片进行清洗，但其通常只能对物镜镜片喷射水、气，无法兼顾照明系统镜片，在喷射水后，部分水流会顺流并残留在照明镜片上，对光源照明亮度有一定的影响，从而导致图像亮度不够影响操作者观察或手术操作。Electronic endoscope is a device with a slender flexible insertion part and a camera device at its front end, which can be inserted into the body cavity to obtain images of the intracavity scene. It can realize the intracavity scene by connecting with other equipment of the endoscope system. The real-time output of the image is displayed. The front end of the insertion part has a curved part, and the observation direction of the observation window of the head end part can be changed by operating the handle of the operation part. And it has a channel for surgical instruments, through which some specified instruments can be passed through for surgical operations. The endoscope is designed with an imaging optical unit having an objective optical system at the head end, and an illumination optical system for providing illumination for the objective optical system is designed adjacent to the objective optical system. Due to the close distance between the illumination optical system and the objective optical system, part of the stray light in the illumination optical system will directly enter the objective optical system, resulting in abnormal imaging of the objective optical system, often causing the image to be too bright and whitish, resulting in unclear images and affecting Operator observation and operation. In addition, a water and air nozzle is designed at the head end to clean the outermost lens of the objective lens system, but usually it can only spray water and air on the objective lens, and cannot take into account the lens of the lighting system. After spraying water, part of the water flow will It flows downstream and remains on the lighting lens, which has a certain impact on the brightness of the light source, resulting in insufficient image brightness to affect the operator's observation or surgical operation.
针对水气喷射清洗，中国专利公开了一种内窥镜[授权公告号为CN102652663B]，在连内窥镜的插入部前端设有送水、送气喷嘴、观察窗和照明窗。其主要原理是物镜系统观察窗所在平面比照明窗所在平面相对高一定尺寸，且两个平面间设计有缓慢过渡的斜面，水气喷射时，通过斜面的导流能同时对观察窗和照明窗进行清洗。由于一部分水气用于照明窗的清洗，用于清洗观察窗的水气的流量及压力相对变小，对观察窗的清洗程度不彻底。For water-air jet cleaning, Chinese patent discloses a kind of endoscope [authorized announcement number is CN102652663B], is provided with water supply, air supply nozzle, observation window and lighting window at the front end of the insertion part of connecting endoscope. The main principle is that the plane where the observation window of the objective lens system is located is relatively higher than the plane where the lighting window is located by a certain size, and a slow transition slope is designed between the two planes. Clean up. Since a part of the water vapor is used for cleaning the lighting window, the flow rate and pressure of the water gas for cleaning the observation window are relatively reduced, and the degree of cleaning of the observation window is not thorough.
针对物镜系统和照明系统相隔比较近的情况，部分方案采取将照明系统的光线角度相对减小或严格保证透镜的出光角度，把较容易或可能会进入到物镜系统中的光线从光学镜片设计中排除掉。但是这种方式也不可能完全避免以上情况，而且对照明镜片的设计加工要求也比较高，当照明光线角度相对减小后，在近焦距观察时，物镜系统采集到的图像四周比较暗，影响可观察性。In view of the relatively close distance between the objective lens system and the lighting system, some schemes adopt relatively reducing the light angle of the lighting system or strictly ensuring the light exit angle of the lens, so that the light that is easier or likely to enter the objective lens system is removed from the optical lens design. ruled out. However, this method cannot completely avoid the above situation, and the requirements for the design and processing of the lighting lens are also relatively high. When the angle of the lighting light is relatively reduced, when observing at a close focal length, the surroundings of the image collected by the objective lens system are relatively dark, which affects the Observability.
针对物镜系统和照明系统相隔比较近的情况，还有方案是将照明系统镜片模组中心相对物镜系统模组中心倾斜一定角度，把物镜系统完全避开在照明系统之外。但这种方案所占前端空间相对较大，不利于充分减小内窥镜头端部的直径尺寸。For the situation that the objective lens system and the lighting system are relatively close, there is another solution that tilts the center of the lens module of the lighting system relative to the center of the objective lens system module at a certain angle, and completely avoids the objective lens system from the lighting system. However, this solution occupies a relatively large front end space, which is not conducive to fully reducing the diameter of the end of the endoscopic lens.
发明内容Contents of the invention
本发明的目的是针对现有的技术存在上述问题，提出了一种可观察性高的内窥镜头端部结构。The object of the present invention is to solve the above-mentioned problems in the prior art, and propose an end structure of an endoscopic lens with high observability.
本发明的目的可通过下列技术方案来实现：The purpose of the present invention can be achieved through the following technical solutions:
内窥镜头端部结构，包括用于与内窥镜弯曲部连接的具有头端面的头端帽，所述的头端面上设有观察窗、照明窗、手术器械通道和水气喷嘴，其特征在于，所述的观察窗与照明窗之间设有用于防止从照明窗发出的无用且有损图像质量的杂散光进入到观察窗内物镜系统中的遮光台阶，位于照明窗内的最外层镜片的外表面低于遮光台阶。The end structure of the endoscope lens includes a head end cap with a head end face for connecting with the bending part of the endoscope. The head end face is provided with observation windows, lighting windows, surgical instrument channels and water and air nozzles. That is, there is a light-shielding step between the observation window and the lighting window to prevent the useless stray light emitted from the lighting window and damaging the image quality from entering the objective lens system in the observation window, which is located on the outermost layer of the lighting window. The outer surface of the lens is lower than the light-shielding step.
在上述的内窥镜头端部结构中，所述的观察窗处于水气喷嘴出水口的喷射范围内，所述的照明窗处于水气喷嘴出水口的喷射范围外，所述的观察窗与照明窗之间还设有用于防止从观察窗扩散出的水流进入到照明窗的阻挡组件。In the end structure of the above-mentioned endoscopic lens, the observation window is within the spraying range of the water outlet of the water-air nozzle, the described lighting window is outside the spraying range of the water-air nozzle outlet, and the observation window and the lighting A blocking assembly for preventing the water flow diffused from the viewing window from entering the lighting window is also provided between the windows.
在上述的内窥镜头端部结构中，所述的阻挡结构包括设于头端面上的阻挡台阶，所述的阻挡台阶高于头端面，上述的照明窗设于该阻挡台阶上，所述阻挡台阶的侧部具有导流斜面。In the above-mentioned endoscopic lens end structure, the blocking structure includes a blocking step arranged on the head end surface, the blocking step is higher than the head end surface, the above-mentioned lighting window is arranged on the blocking step, and the blocking step The side of the step has a diversion slope.
在上述的内窥镜头端部结构中，所述的遮光台阶设于阻挡台阶上，所述的遮光台阶呈环形且环绕照明窗设置。阻挡台阶可与遮光台阶呈一体式结构设计，而且遮光台阶可以高于阻挡台阶。因此，遮光台阶除了具备遮光能力，还具有防止从观察窗扩散出的水流进入照明窗的能力。In the above end structure of the endoscopic lens, the light-shielding step is arranged on the blocking step, and the light-shielding step is ring-shaped and arranged around the lighting window. The blocking step can be designed as an integral structure with the light-shielding step, and the light-shielding step can be higher than the blocking step. Therefore, in addition to the light-shielding ability, the light-shielding step also has the ability to prevent the water flow diffused from the observation window from entering the lighting window.
在上述的内窥镜头端部结构中，所述照明窗的数量为1-5个且均处于水气喷嘴出水口的喷射范围外，所述阻挡台阶的数量与照明窗的数量相等，所述遮光台阶的数量与照明窗的数量相等。In the end structure of the above-mentioned endoscopic lens, the number of the lighting windows is 1-5 and they are all outside the spray range of the water outlet of the water vapor nozzle, the number of the blocking steps is equal to the number of the lighting windows, the The number of shading steps is equal to the number of lighting windows.
在上述的内窥镜头端部结构中，所述照明窗的数量为2个。In the above end structure of the endoscopic lens, the number of the lighting windows is two.
其中阻挡台阶为2个，遮光台阶也为2个，每个照明窗对应设有一个遮光台阶和一个阻挡台阶。为了提高光照均匀度，2个照明窗沿观察窗与手术器械通道的连线对称分布，那么2个阻挡台阶夜宴观察窗与手术器械通道的连线对称分布。There are 2 blocking steps and 2 light-shielding steps, and each lighting window is correspondingly provided with a light-shielding step and a blocking step. In order to improve the uniformity of illumination, the two lighting windows are symmetrically distributed along the line connecting the observation window and the surgical instrument channel, so the two blocking steps are symmetrically distributed along the line connecting the observation window and the surgical instrument channel.
在上述的内窥镜头端部结构中，所述的手术器械通道处于水气喷嘴出水口的喷射范围外。In the above-mentioned endoscopic lens end structure, the surgical instrument channel is outside the spraying range of the water outlet of the water-air nozzle.
在上述的内窥镜头端部结构中，头端面上设有辅助送水孔。In the above end structure of the endoscopic lens, an auxiliary water delivery hole is provided on the head end surface.
工作时，内窥镜的冷光源主机提供照明通过导光部后由光纤将照明光传递到头端部，从2个照明窗发出照明光，物镜系统通过观察窗采集到图像后通过电信号线传输到内窥镜的图像处理器主机分析处理并最终由显示器显示图像，供操作人员观察。When working, the cold light source host of the endoscope provides illumination and passes through the light guide part, then the optical fiber transmits the illumination light to the head end, and emits illumination light from the two illumination windows. The objective lens system collects images through the observation window and transmits them through electrical signal lines The image processor host computer of the endoscope analyzes and processes the image and finally displays the image on the monitor for the operator to observe.
两个照明窗的光学系统提供的光源照明角度为θ，χ角度对应的为无用的杂散光。其中，θ值的大小根据物镜系统的光学设计匹配其观察角度，即在设定的物镜观察角度下，对于照明窗，只有θ角度内的光是可以被充分利用的，而在θ之外的χ角度的光是无用且相对有损坏图像质量的光，χ＝(180°-θ)/2。设计了2个遮光台阶，同时照明窗的最外层镜片的外表面低于遮光台阶一定高度t，在工作时，照明窗所发出的除θ角度以外的χ角度的光均被遮光台阶遮挡。因此，χ角度对应的杂散光不会直接进入到物镜系统中，也就不会影响到图像质量，提高可观察性。The light source illumination angle provided by the optical system of the two illumination windows is θ, and the χ angle corresponds to useless stray light. Among them, the value of θ matches its observation angle according to the optical design of the objective lens system, that is, under the set objective lens observation angle, for the illumination window, only the light within the angle of θ can be fully utilized, while the light outside the angle of θ Light at an angle of x is useless and relatively image-damaging light, x=(180°−θ)/2. Two shading steps are designed. At the same time, the outer surface of the outermost lens of the lighting window is lower than a certain height t of the shading steps. During operation, the light emitted by the lighting window at χ angles other than the θ angle is blocked by the shading steps. Therefore, the stray light corresponding to the χ angle will not directly enter the objective lens system, which will not affect the image quality and improve the observability.
另外，阻挡台阶亦可解决照明窗会残留水滴的问题：当水气喷嘴喷射出水时，按其设计的角度主要喷射面为观察窗，喷水后会对观察窗接着进行喷气吹走残留水滴。当水气喷嘴对观察窗喷水清洗时，其中一小部分水会扩散到头端帽头端面的其他位置，由于头端帽上的阻挡台阶所在平面相对高出头端帽的头端面，照明窗又处于阻挡台阶内，因此扩散出来的小部分水流就被两个阻挡台阶所遮挡并顺着导流斜面导流到不受影响的区域，照明窗也就不会受到水滴的影响，使其能够提供最优的照明光源。In addition, blocking the steps can also solve the problem of water droplets remaining in the lighting window: when the water-air nozzle sprays water, the main spray surface is the observation window according to its design angle. When the water-air nozzle sprays water to clean the observation window, a small part of the water will spread to other positions on the head end face of the head end cap. Since the plane of the blocking step on the head end cap is relatively higher than the head end face of the head end cap, the lighting window will It is in the blocking step, so a small part of the diffused water flow is blocked by the two blocking steps and guided to the unaffected area along the diversion slope, and the lighting window will not be affected by the water droplets, so that it can provide Optimal lighting source.
与现有技术相比，本内窥镜头端部结构具有以下优点：Compared with the prior art, the end structure of the endoscopic lens has the following advantages:
其结构设计合理，观察窗处于水气喷嘴出水口的喷射范围内，照明窗处于水气喷嘴出水口的喷射范围外，当水气喷嘴对观察窗喷水清洗时，仅有小部分水会扩散到头端帽头端面的其他位置，同时设计阻挡台阶，可有效阻挡水流进入到照明窗内，并由导流斜面导流到不受影响的区域，使照明窗能提供最优的照明光源；同时设置了遮光台阶，可防止从照明窗发出的无用且有损图像质量的杂散光进入到观察窗内的物镜系统中，观察窗的可观察性高。Its structural design is reasonable, the observation window is within the spraying range of the water-air nozzle outlet, and the lighting window is outside the spraying range of the water-air nozzle outlet. When the water-air nozzle sprays water to clean the observation window, only a small part of the water will diffuse At the other positions of the end face of the head cap, the blocking steps are designed at the same time, which can effectively prevent the water flow from entering the lighting window, and divert it to the unaffected area by the diversion slope, so that the lighting window can provide the optimal lighting source; at the same time A light-shielding step is set to prevent the useless stray light from the illumination window that damages the image quality from entering the objective lens system in the observation window, and the observation window has high observability.
附图说明Description of drawings
图1是本发明提供的头端部结构的结构示意图。Fig. 1 is a structural schematic diagram of the head end structure provided by the present invention.
图2是本发明提供的头端部结构的剖视图。Fig. 2 is a cross-sectional view of the head end structure provided by the present invention.
图中，1、头端面；2、头端帽；3、观察窗；4、照明窗；5、手术器械通道；6、水气喷嘴；7、遮光台阶；8、阻挡台阶；9、导流斜面；10、辅助送水孔。In the figure, 1. Head end surface; 2. Head end cap; 3. Observation window; 4. Lighting window; 5. Surgical instrument channel; 6. Water and air nozzle; 7. Shading steps; Inclined surface; 10, auxiliary water delivery hole.
具体实施方式Detailed ways
以下是本发明的具体实施例并结合附图，对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.
如图1所示的内窥镜头端部结构，包括用于与内窥镜弯曲部连接的具有头端面1的头端帽2，头端面1上设有观察窗3、照明窗4、手术器械通道5和水气喷嘴6，观察窗3与照明窗4之间设有用于防止从照明窗4发出的无用且有损图像质量的杂散光进入到观察窗3内物镜系统中的遮光台阶7，如图2所示，位于照明窗4内的最外层镜片的外表面低于遮光台阶7。The end structure of the endoscope lens as shown in Figure 1 includes a head end cap 2 with a head end face 1 for connecting with the endoscope bending part, and the head end face 1 is provided with an observation window 3, an illumination window 4, and surgical instruments The channel 5 and the water-air nozzle 6 are provided with a light-shielding step 7 between the observation window 3 and the illumination window 4 to prevent useless stray light emitted from the illumination window 4 and detrimental to the image quality from entering the objective lens system in the observation window 3, As shown in FIG. 2 , the outer surface of the outermost lens located in the lighting window 4 is lower than the light-shielding step 7 .
如图1所示，观察窗3处于水气喷嘴6出水口的喷射范围内，照明窗4处于水气喷嘴6出水口的喷射范围外，观察窗3与照明窗4之间还设有用于防止从观察窗3扩散出的水流进入到照明窗4的阻挡组件。As shown in Figure 1, the observation window 3 is in the injection range of the water-air nozzle 6 water outlets, and the lighting window 4 is outside the injection range of the water-air nozzle 6 water outlets. The water flow diffused from the viewing window 3 enters the blocking assembly of the lighting window 4 .
如图1和图2所示，阻挡结构包括设于头端面1上的阻挡台阶8，阻挡台阶8高于头端面1，照明窗4设于该阻挡台阶8上，阻挡台阶8的侧部具有导流斜面9。As shown in Figures 1 and 2, the blocking structure includes a blocking step 8 arranged on the head end face 1, the blocking step 8 is higher than the head end face 1, the lighting window 4 is arranged on the blocking step 8, and the side of the blocking step 8 has Diversion slope 9.
如图1所示，遮光台阶7设于阻挡台阶8上，遮光台阶7呈环形且环绕照明窗4设置。阻挡台阶8可与遮光台阶7呈一体式结构设计，而且遮光台阶7可以高于阻挡台阶8。因此，遮光台阶7除了具备遮光能力，还具有防止从观察窗3扩散出的水流进入照明窗4的能力。As shown in FIG. 1 , the light-shielding step 7 is arranged on the blocking step 8 , and the light-shielding step 7 is ring-shaped and arranged around the lighting window 4 . The blocking step 8 and the light-shielding step 7 can be designed as an integral structure, and the light-shielding step 7 can be higher than the blocking step 8 . Therefore, the light-shielding step 7 not only has the light-shielding ability, but also has the ability to prevent the water flow diffused from the observation window 3 from entering the lighting window 4 .
根据实际情况，可设置的照明窗4的数量为1-5个且均处于水气喷嘴6出水口的喷射范围外，阻挡台阶8的数量与照明窗4的数量相等，遮光台阶7的数量与照明窗4的数量相等。According to the actual situation, the quantity of lighting windows 4 that can be set is 1-5 and is all outside the spray range of the water outlet of water vapor nozzle 6, the quantity of blocking steps 8 is equal to the quantity of lighting windows 4, and the quantity of shading steps 7 is equal to that of lighting windows 4. The number of lighting windows 4 is equal.
如图1所示，照明窗4的数量为2个。其中阻挡台阶8为2个，遮光台阶7也为2个，每个照明窗4对应设有一个遮光台阶7和一个阻挡台阶8。为了提高光照均匀度，2个照明窗4沿观察窗3与手术器械通道5的连线对称分布，那么2个阻挡台阶8夜宴观察窗3与手术器械通道5的连线对称分布。As shown in FIG. 1 , there are two lighting windows 4 . There are two blocking steps 8 and two light-shielding steps 7 , and each lighting window 4 is correspondingly provided with a light-shielding step 7 and a blocking step 8 . In order to improve the uniformity of illumination, the two lighting windows 4 are symmetrically distributed along the line connecting the observation window 3 and the surgical instrument channel 5, so the two blocking steps 8 are symmetrically distributed along the line connecting the observation window 3 and the surgical instrument channel 5.
如图1所示，手术器械通道5处于水气喷嘴6出水口的喷射范围外，在头端面1上设有辅助送水孔10。As shown in FIG. 1 , the surgical instrument channel 5 is outside the spray range of the water outlet of the water-air nozzle 6 , and an auxiliary water delivery hole 10 is provided on the head end surface 1 .
工作时，内窥镜的冷光源主机提供照明通过导光部后由光纤将照明光传递到头端部，从2个照明窗4发出照明光，物镜系统通过观察窗3采集到图像后通过电信号线传输到内窥镜的图像处理器主机分析处理并最终由显示器显示图像，供操作人员观察。When working, the cold light source host of the endoscope provides illumination through the light guide part, and then the optical fiber transmits the illumination light to the head end, and emits illumination light from the two illumination windows 4. The objective lens system collects images through the observation window 3 and passes electrical signals The line is transmitted to the image processor host of the endoscope for analysis and processing, and finally the image is displayed on the monitor for the operator to observe.
两个照明窗4的光学系统提供的光源照明角度为θ，χ角度对应的为无用的杂散光。其中，θ值的大小根据物镜系统的光学设计匹配其观察角度，即在设定的物镜观察角度下，对于照明窗4，只有θ角度内的光是可以被充分利用的，而在θ之外的χ角度的光是无用且相对有损坏图像质量的光，χ＝(180°-θ)/2。设计了2个遮光台阶7，同时照明窗4的最外层镜片的外表面低于遮光台阶7一定高度t，在工作时，照明窗4所发出的除θ角度以外的χ角度的光均被遮光台阶7遮挡。因此，χ角度对应的杂散光不会直接进入到物镜系统中，也就不会影响到图像质量，提高可观察性。The light source illumination angle provided by the optical system of the two illumination windows 4 is θ, and the χ angle corresponds to useless stray light. Among them, the size of the θ value matches its observation angle according to the optical design of the objective lens system, that is, under the set objective lens observation angle, for the illumination window 4, only the light within the θ angle can be fully utilized, and the light outside the θ Light at an angle of χ is useless and relatively image-damaging light, χ=(180°−θ)/2. Two light-shielding steps 7 are designed, and the outer surface of the outermost lens of the lighting window 4 is lower than a certain height t of the light-shielding step 7 at the same time. When working, the light emitted by the lighting window 4 except the χ angles other than the θ angle is all blocked The light-shielding step 7 blocks. Therefore, the stray light corresponding to the χ angle will not directly enter the objective lens system, which will not affect the image quality and improve the observability.
另外，阻挡台阶8亦可解决照明窗4会残留水滴的问题：当水气喷嘴6喷射出水时，按其设计的角度主要喷射面为观察窗3，喷水后会对观察窗3接着进行喷气吹走残留水滴。当水气喷嘴6对观察窗3喷水清洗时，其中一小部分水会扩散到头端帽2头端面1的其他位置，由于头端帽2上的阻挡台阶8所在平面相对高出头端帽2的头端面1，照明窗4又处于阻挡台阶8内，因此扩散出来的小部分水流就被两个阻挡台阶8所遮挡并顺着导流斜面9导流到不受影响的区域，照明窗4也就不会受到水滴的影响，使其能够提供最优的照明光源。In addition, the blocking step 8 can also solve the problem of water droplets remaining in the lighting window 4: when the water-air nozzle 6 sprays water, the main spray surface is the observation window 3 according to the angle of its design, and the observation window 3 will then be sprayed with water after spraying water. Blow off residual water droplets. When the water-air nozzle 6 sprays water to clean the observation window 3, a small part of the water will diffuse to other positions on the head end surface 1 of the head end cap 2, because the plane where the blocking step 8 on the head end cap 2 is relatively higher than the head end cap 2 The head end face 1 of the head, the lighting window 4 is in the blocking step 8, so a small part of the diffused water flow is blocked by the two blocking steps 8 and guided to the unaffected area along the diversion slope 9, the lighting window 4 It will not be affected by water droplets, so that it can provide an optimal lighting source.
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810189824.6ACN108420389A (en) | 2018-03-08 | 2018-03-08 | Endoscope head end construction |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810189824.6ACN108420389A (en) | 2018-03-08 | 2018-03-08 | Endoscope head end construction |
| Publication Number | Publication Date |
|---|---|
| CN108420389Atrue CN108420389A (en) | 2018-08-21 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810189824.6APendingCN108420389A (en) | 2018-03-08 | 2018-03-08 | Endoscope head end construction |
| Country | Link |
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| CN (1) | CN108420389A (en) |
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| RJ01 | Rejection of invention patent application after publication | Application publication date:20180821 | |
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