WO2016041300A1

WO2016041300A1 - Endoscope tip structure

Info

Publication number: WO2016041300A1
Application number: PCT/CN2015/000646
Authority: WO
Inventors: 黄宏辉; 李亚舟
Original assignee: 珠海普生医疗科技有限公司
Priority date: 2014-09-19
Filing date: 2015-09-18
Publication date: 2016-03-24
Also published as: CN104224092B; CN104224092A

Abstract

An endoscope tip structure, comprising a sheath (1); an imaging module (2), a light source (3) and a working channel (4) are disposed at the tip of the sheath (1); an angle is formed between an axis of the working channel (4) and an axis of the sheath (1), the angle being in a range of from 0° to 45°. The endoscope tip structure can effectively improve the performance of an endoscope.

Description

Endoscope tip structure

Technical field

The present invention relates to an endoscope, and more particularly to an endoscope tip structure.

Background technique

The medical endoscope is a medical electronic optical instrument that can be inserted into the body cavity and the internal cavity of the organ for direct observation, diagnosis and treatment. It consists of a bendable part, a light source and a set of lenses. Through the body's natural channels, or small incisions made through surgery into the body. When using the endoscope, introduce the endoscope into the pre-examined organ, and directly peep at the relevant part of the body. The quality of the image directly affects the use of the endoscope and also marks the development level of the endoscope technology. It can directly observe the tissue morphology of the internal organs of the human body, which can improve the accuracy of diagnosis. The advantages of the endoscopic diagnosis and treatment technology combined with medical endoscopes have been recognized by the medical community.

Medical endoscope equipment, classified according to its development and imaging structure: can be roughly divided into three categories: hard tube endoscope, optical fiber (hose) endoscope and electronic endoscope. Among them, the electronic endoscope is an endoscope in which a micro image sensor (CCD, Charge Couple Device or CMOS, Complementary Metal Oxide Semiconductor) is placed at the tip of the endoscope to transmit an image signal by a cable. The electronic endoscope converts light energy into electrical energy through a miniature image sensor, and then processes the image through a video processing center, then stores and reconstructs it, and displays it on the display screen. This greatly improves the image quality, overcomes the shortcomings of the fiber being easy to break during use, and has a short life, and there is no drawback that the fiber endoscope has black spots due to fiber breakage.

As shown in FIG. 1 and FIG. 2, the internal structure of the electronic endoscope is composed of a sheath 1, an angle wire, a working channel 4, an electronic objective lens 2, a light source 3, a signal line, and a power line, and the electronic mirror is composed of a CCD component and a signal. The transmission line consists of. The performance and range of application of the endoscope is closely related to the outer diameter of the insertion tube and the tip end, and the inner diameter of the working channel. The smaller the outer diameter, the wider the range of application, the better the comfort of the patient; the larger the imaging member and the working channel inside the insertion tube, the larger the imaging member and the better the definition. The larger the working channel, the stronger the passing ability, the higher the suction flow rate, and the more instruments supported. In the case where the size of the imaging member is fixed, the outer diameter of the insertion tube is reduced, and only the inner diameter of the working channel is reduced. However, the inner diameter of the working channel is reduced, which in turn affects the performance of the working channel. In the industry, it is urgent to solve the problem of reducing the outer diameter of the insertion tube while the inner diameter of the working channel is as large as possible.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an endoscope tip structure which can effectively improve the performance of an endoscope.

The technical solution adopted by the present invention is that the tip end structure includes a sheath, and an imaging module, a light source and a working channel are disposed at a tip end portion of the sheath, and an axial position of the working channel and an axis of the sheath There is an angle between the positions.

Further, an angle between an axial position of the working channel and an axial position of the sheath ranges from 0° to 45°.

Further, the angle between the axial position of the working channel and the axial position of the sheath ranges from 6°.

Further, a chamfered surface I is disposed at a tip end portion of the sheath, and a front end surface of the working channel is located at the chamfered surface I.

Further, the front end surface of the working channel is disposed as a chamfered surface II, and the chamfered surface I is flush with the chamfered surface II.

Further, the front end portion of the sheath is provided with a first end surface and a second end surface, the imaging module and the light source are disposed in the first end surface, and the working channel is disposed in the second end surface The second end surface is perpendicular to an axis of the working channel.

Further, a front end surface of the working channel is flush with the second end surface.

Further, a front end surface of the working channel is disposed as a curved surface, and a front end of the oblique curved surface extends to the first end surface, and a rear portion of the inclined curved surface extends to the second end surface.

Further, the working channel and the sheath are fixed by resin filling or welding.

Further, the light source is an LED light source or a light guide beam.

The invention has the beneficial effects that since the invention comprises a sheath, an imaging module, a light source and a working channel are arranged at the tip end of the sheath, and the axial position of the working channel and the axial position of the sheath There is an angle. Therefore, the present invention provides an imaging module, a light source and a working channel in the distal end portion of the endoscope, and an axial angle between the axial position of the working channel and the axial position of the sheath, the working channel and the sheath For the non-parallel setting, except for the presence of the power line and the signal line behind the imaging module and the light source, there are no components in the remaining space, and the working channel can be realized with the sheath here. There is a certain angle setting, such that the outer diameter of the working channel is not limited to the size of the remaining space at the tip end of the sheath except for the space occupied by the imaging module and the light source, and the maximum inner diameter of the working channel may be larger than the sheath In the apex portion of the apex portion, the size of the remaining space outside the space occupied by the imaging module and the light source is removed, so that the size of the sheath, the imaging module, and the light source are kept constant. Achieving an increase in the working channel; or, in the case where the working channel, the imaging module, and the size of the light source are constant, the outer diameter of the sheath is made smaller; as can be seen, the present invention The endoscope structure of the endoscope can greatly improve the performance of the endoscope, the passage of the working channel is enhanced, the flow rate is also increased, and more instruments are supported.

DRAWINGS

1 is a cross-sectional view showing a simplified structure of a distal end portion of an endoscope in the prior art;

2 is a front elevational view showing the distal end portion of the endoscope in the prior art;

Figure 3 is a simplified cross-sectional view showing the distal end portion of the endoscope of the present invention;

Figure 4 is a front elevational view showing the distal end portion of the endoscope of the present invention;

Figure 5 is a cross-sectional view showing a simplified structure of the distal end portion of the endoscope according to the second embodiment;

Figure 6 is a front elevational view showing the distal end portion of the endoscope according to the second embodiment;

Fig. 7 is a schematic view showing the structure of the third embodiment.

detailed description

Embodiment 1:

As shown in FIGS. 3 and 4, in the present embodiment, the present invention includes a sheath 1 in which an imaging module 2, a light source 3, and a working channel 4 are disposed at a tip end portion of the sheath 1. There is an angle between the axial position of the working channel 4 and the axial position of the sheath 1. The angle between the axial position of the working channel 4 and the axial position of the sheath 1 ranges from 0° to 45°. The angle can be set according to the type of the sheath 1, the imaging module 2, the light source 3, and the specific size. When the size of the imaging module 2 and the light source 3 is small and the length is short, the angle can be The angle of inclination of the working channel 4 is set to be larger; when the size of the imaging module 2 and the light source 3 is large and the length thereof is long, the axial position of the working channel 4 needs to be The angle between the axial positions of the sheath 1 is adjusted to be smaller. In the present embodiment, the angle between the axial position of the working channel 4 and the axial position of the sheath 1 may be 6°, or other angles. In addition, the working channel 4 The axis and the axis of the sheath 1 are not necessarily in the same plane, but when the two axes are on the same plane, the inner diameter of the working channel 4 can be taken to an optimum value. In this embodiment, specifically, a beveled surface I 5 is disposed at the tip end portion of the sheath 1, and the front end surface of the working channel 4 is located just at the chamfered surface I 5 . The front end surface of the working channel 4 is disposed as a chamfered surface II 6, and the chamfered surface I 5 is flush with the chamfered surface II 6 . The working channel 4 and the sheath 1 are fixed by resin filling or welding, such as ultrasonic welding. The light source 3 is an LED light source or a light guide beam. In the present invention, an LED light source is selected as the endoscope light source.

As shown in FIG. 3, the end face of the outlet end of the sheath 1 and the end face of the outlet end of the working channel 4 are located on two different planes.

The working channel 4 is hollow cylindrical. In the present invention, it is assumed that the size of the imaging module 2 and the light source 3 is a fixed value, and the maximum inner diameter of the working channel 4 is set to a, and the removal in the tip end portion of the sheath 1 is set. The maximum inner diameter of the space formed in the remaining space outside the space occupied by the imaging module 2 and the light source 3 is b, then a>b. The present invention can achieve the above relationship. In the actual manufacturing process, the inner diameter of the cylinder is generally taken and the values a and b are taken. Of course, it is also possible to take the elliptical column as the inner diameter and take the values a and b. This depends on the actual situation and manufacturing costs.

It is estimated that when the angle between the axis of the working channel 4 and the axis of the sheath 1 is 6°, the cross-sectional area in the working channel 4 can be increased by about 30%.

Embodiment 2:

As shown in FIG. 5 and FIG. 6 , the difference between the embodiment and the first embodiment is that the front end portion of the sheath 1 is provided with a first end surface 11 and a second end surface 12 , and the imaging module 2 and the light source are 3 is disposed in the first end surface 11 , the working channel 4 is disposed in the second end surface 12 , and the second end surface 12 is perpendicular to an axis of the working channel 4 . The front end face of the working channel 4 is flush with the second end face 12. At this time, the inner diameter of the working passage portion housed in the sheath 1 can be set larger.

Embodiment 3:

As shown in FIG. 7 , the difference between the embodiment and the second embodiment is that the front end surface of the working channel 4 is disposed as a curved surface 7 , and the front end of the inclined curved surface 7 extends to the first end surface 11 . The rear portion of the inclined curved surface 7 extends to the second end surface 12.

When the present invention is specifically applied to an electronic endoscope, a power line is connected to the imaging module 2, the light source 3, a signal line is connected to the imaging module 2, and then the working channel 4 can be located in the imaging mode. The rear space of group 2. A hose is connected to the rear of the sheath and to the rear of the working channel, and then to the peripheral device.

Compared with the prior art endoscope end structure, the endoscope tip structure of the present invention can significantly increase the inner diameter of the working channel without changing the size of the sheath, so that the working channel space Increased, the working channel's ability to pass through is enhanced, the suction flow is also higher, and more instruments are supported, which greatly improves the performance of the endoscope.

The invention is applicable to the field of medical endoscopes.

Claims

An endoscope tip structure includes a sheath (1), and an imaging module (2), a light source (3) and a working channel (4) are disposed at a tip end portion of the sheath (1), wherein There is an angle between the axial position of the working channel (4) and the axial position of the sheath (1).
The endoscope tip structure according to claim 1, wherein an angle between an axial position of the working channel (4) and an axial position of the sheath (1) ranges from 0° to 45°. .
The endoscope tip structure according to claim 2, characterized in that the angle between the axial position of the working channel (4) and the axial position of the sheath (1) ranges from 6°.
The endoscope tip structure according to any one of claims 1 to 3, characterized in that a beveled surface I (5) is provided at a tip end portion of the sheath (1), and the working channel (4) The front end face is located just at the chamfered surface I (5).
The endoscope tip structure according to claim 4, characterized in that the front end surface of the working channel (4) is provided as a chamfered surface II (6), the chamfered surface I (5) and the chamfered surface II (6) is flush.
The endoscope tip structure according to any one of claims 1 to 3, characterized in that the tip end portion of the sheath (1) is provided with a first end surface (11) and a second end surface (12). The imaging module (2) and the light source (3) are disposed in the first end surface (11), and the working channel (4) is disposed in the second end surface (12), the second end surface (12) perpendicular to the axis of the working channel (4).
The endoscope tip structure according to claim 6, characterized in that the front end face of the working channel (4) is flush with the second end face (12).
The endoscope tip structure according to claim 6, wherein a front end surface of the working channel (4) is provided as a beveled surface (7), and a front end of the oblique curved surface (7) extends to the At the first end face (11), the rear portion of the inclined curved surface (7) extends to the second end face (12).
The endoscope tip structure according to claim 1, characterized in that the working channel (4) and the sheath (1) are fixed by resin filling or welding.
The endoscope tip structure according to claim 1, characterized in that the light source (3) is an LED light source or a light guide.