Endoscope

Abstract

The utility model relates to an endoscope which comprises a catheter and a lighting assembly, the lighting assembly comprises a light source and a light guide part which are arranged at the near end of the catheter, and the light guide part is inserted in the catheter. The first part extends from the near end of the catheter to the far end of the catheter, the second part extends from the far end of the first part to the far end of the catheter, the first part is of a cylindrical structure, the axis of the first part is parallel to the axis of the catheter, and the second part is of an arc-shaped shield structure and comprises a first section and a second section; the near end of the first section is fixedly connected with the far end of the first part, the far end of the first section is fixedly connected with the near end of the second section, the first section obliquely extends in the direction gradually away from the axis of the catheter from the near end to the far end in the axis direction of the catheter, and the circumferential length is gradually increased. The second section extends in the direction parallel to the axis of the catheter, the circumferential length of the second section is kept unchanged, and the circumferential length of the second section is equal to the circumferential length of the far end of the first section.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and particularly relates to an endoscope. Background Art

[0002] Minimally invasive surgery refers to a surgical method that uses modern medical devices such as endoscopes and related equipment to perform surgery inside the human body cavity. Compared with the traditional surgical method, minimally invasive surgery has the advantages of small trauma, light pain, and fast recovery. An endoscope is a tube equipped with a light. The endoscope can enter the human body through the natural orifice of the human body or through a small incision made during surgery. The prominent feature of using an endoscope is that the surgical incision is small, the incision scar is not obvious, the postoperative reaction is light, the bleeding, bruising and swelling time can be greatly reduced, and the recovery is faster than that of traditional surgery.

[0003] The traditional endoscope lighting methods generally include two methods: using a light guide fiber for lighting and using a front-mounted LED for lighting. The light guide fiber lighting has the following defects: 1. The process is complex and the cost is high. It is necessary to draw a high-purity glass preform into filaments, coat the cladding and the protective layer, then cut the fiber filaments into the required length, bundle the fiber filaments into a bundle, and adjust the required shape and angle. Finally, glue is used for curing and polishing. 2. The outgoing angle is limited by the refractive index difference between the fiber glass filament and the cladding, generally only 80°. 3. The energy is concentrated and the lighting uniformity is not high. The front-mounted LED lighting has the following defects: Since the brightness of the LED is proportional to the power, when the brightness is sufficient, the LED generates relatively serious heat. However, due to the limited volume of the endoscope, it is impossible to ensure good heat dissipation while having sufficient brightness, resulting in the risk of overheating of the endoscope head. Summary of the Invention

[0004] The purpose of the utility model is to provide a new type of endoscope. The lighting structure of the endoscope has a simple manufacturing process, low cost, a large light-emitting angle and high uniformity, and the rear-mounted light source avoids the problem of overheating of the endoscope head.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An endoscope, the endoscope comprising a catheter and an illumination assembly. The illumination assembly includes a light source disposed at the proximal end of the catheter and a light guiding member capable of transmitting the light of the light source to the distal end of the catheter. The light guiding member is inserted into the catheter. The light guiding member includes a first portion extending from the proximal end to the distal end of the catheter and a second portion extending from the distal end of the first portion to the distal end of the catheter. The first portion is a cylindrical structure, and the axis of the first portion is parallel to the axis of the catheter. The second portion is an arc-shaped shield structure. The second portion includes a first section and a second section. The proximal end of the first section is fixedly connected to the distal end of the first portion, and the distal end of the first section is fixedly connected to the proximal end of the second section. Along the axial direction of the catheter, the first section extends obliquely away from the axis of the catheter in the direction from the proximal end to the distal end and the circumferential length gradually increases. The second section extends in a direction parallel to the axis of the catheter and the circumferential length remains unchanged. The circumferential length of the second section is equal to the circumferential length of the distal end of the first section.

[0007] Specifically, the thickness of the second portion gradually decreases from the middle to both sides, and the projection of the second portion in the cross-section is approximately crescent-shaped.

[0008] Specifically, the proximal end of the second portion is arc-shaped, and its outer diameter is equal to the outer diameter of the first portion, reducing light loss.

[0009] Specifically, the distal end of the second portion is a bevel surface, so that the light exits at a certain oblique angle, expanding the light exit angle.

[0010] Further, the distal end of the second portion gradually inclines from the inner arc edge to the outer arc edge in the direction from the proximal end to the distal end to form the bevel surface.

[0011] Specifically, the distal end of the catheter is coplanar with the distal end of the second portion.

[0012] Specifically, the distal surface of the catheter member is a frosted surface. The distal head of the catheter member is subjected to frosting or sandblasting treatment to make its surface present a frosted state, which can cause diffuse reflection of the outgoing optical fiber and improve the uniformity of the outgoing light.

[0013] Specifically, the material of the light guiding member is optical plastic, and the light guiding member can be integrally formed, and its cost is greatly reduced compared with that of glass fiber. During preparation, an injection molding process is adopted to inject the optical plastic into the designed shape of the light guiding member. The dimensional parameters of the light guiding member can be customized according to requirements, avoiding the cumbersome links such as the later processing process adjustment of traditional optical fiber filaments, and the injection molded parts have obvious price advantages.

[0014] Specifically, the axial length of the second portion is 1 - 3 cm.

[0015] Specifically, the ratio of the length of the first section to the length of the second section is (0.5-1.5):1.

[0016] Furthermore, the ratio of the length of the first section to the length of the second section is (0.8-1.2):1.

[0017] Specifically, an aluminum film is coated on the outer surface of the light guide component. In the special-shaped part of the light guide component, light will not be totally reflected, and the aluminum film will reflect the refracted light into the light guide component. The aluminum film can reflect the light overflowing due to the shape transition between the first part and the second part, further reducing light loss and improving light transmission efficiency. During preparation, the injection-molded light guide column is placed in a vacuum, and a layer of aluminum film is attached to the outer surface of the light guide component by evaporation or sputtering.

[0018] Specifically, a paint layer is coated on the outer surface of the aluminum film to protect the aluminum film from falling off. During preparation, paint is applied to the surface of the aluminum film and the film is fixed by high-temperature baking.

[0019] Specifically, the endoscope also includes a camera module arranged inside the distal end of the catheter, the camera module is located on the side where the center of the second part is located, and the distal end of the camera module is coplanar with the distal end of the catheter and the distal end of the light guide component.

[0020] Specifically, a first cavity matching the light guide component and used to install the light guide component is provided inside the catheter, and a second cavity extending from the proximal end to the distal end of the catheter and used to install the camera module is provided.

[0021] Specifically, the light source is a cold light source LED lamp.

[0022] According to some embodiments, the light source is a cold light source LED lamp disposed in the operating portion, which is close to the proximal end of the catheter and located on the axis of the first portion.

[0023] The endoscope also includes an operating part arranged at the proximal end of the catheter, the light source is arranged in the operating part, or the operating part is provided with a light guide channel connected to the proximal end of the catheter, a light guide is arranged in the light guide channel, one end of the light guide is connected to the proximal end of the light guide component, and the other end is provided with the light source.

[0024] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0025] The endoscope of the present utility model adopts a light guide component with a special structure. The first part with a cylindrical structure is better connected to the rear light source, and the second part with an arc-shaped shield structure realizes a large light output angle and improves the uniformity of the emitted light, so as to ensure sufficient brightness while avoiding the risk of excessive temperature at the distal end of the endoscope. The process of the present utility model is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the endoscope of Embodiment 1;

[0027] Figure 2 It is a three-dimensional structural diagram of the distal end ( Figure 1 at A in) of the endoscope of Embodiment 1;

[0028] Figure 3 It is Figure 2 a schematic structural diagram after hiding the catheter part;

[0029] Figure 4 It is Figure 3 the front view of;

[0030] Figure 5 It is Figure 3 the side view of;

[0031] Figure 6 It is a three-dimensional structural diagram of the light guide component in the endoscope of Embodiment 1;

[0032] Figure 7 It is a three-dimensional structural diagram of the light guide component in the endoscope of Embodiment 1 from another perspective;

[0033] Figure 8 It is a structural diagram of the distal end face of the light guide component in the endoscope of Embodiment 1;

[0034] Figure 9 It is a three-dimensional structural diagram of the distal end part of the catheter in the endoscope of Embodiment 1;

[0035] Figure 10 It is Figure 9 the side view of;

[0036] Figure 11 It is Figure 9 the perspective view of;

[0037] Figure 12 It is a schematic structural diagram of the endoscope of Embodiment 2.

[0038] In the above drawings, 1 is a catheter; 2 is an operation part; 3 is a light guiding component; 311 is a first part; 312 is a second part; 3121 is a first section; 3122 is a second section; 32 is an aluminum film; 33 is a paint layer; 4 is an imaging module; 5 is a cold light source LED lamp; 6 is a light guiding beam. Detailed implementation manners

[0039] The following further describes the present utility model in combination with the embodiments shown in the drawings.

[0040] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0041] In the description of the present utility model, "proximal end" and "distal end" are relative to the operator. During use, the end close to the operator is the proximal end, and the end far from the operator and entering the patient's body is the distal end; the axial direction refers to the direction parallel to the center line connecting the distal end and the proximal end of the instrument or component, and the radial direction refers to the direction perpendicular to the axial direction; inside and outside are positions defined by the distance relative to the center of the instrument or component. Among them, inside is the position close to the center of the instrument or component, and outside is the position far from the center of the instrument or component. The description of the above orientation terms is only for the convenience of describing the embodiments of 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 orientation, and therefore cannot be understood as a limitation to the embodiments of the present invention.

[0042] The drawings provided by the present utility model are only schematic diagrams of the endoscope structure for the convenience of readers to understand, and do not represent a limitation to the endoscope structure.

[0043] In the embodiments of the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0044] To simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the embodiments of the present utility model.

[0045] Embodiment 1

[0046] As Figures 1 to 11 shown, this embodiment provides an implementation manner of the endoscope of the present utility model, which includes a catheter 1, an illumination assembly, an imaging module 4 and an operation part 2.

[0047] Specifically, the lighting assembly includes a light source disposed at the proximal end of the conduit 1 and a light guiding member 3 capable of transmitting the light of the light source to the distal end of the conduit 1. The light guiding member 3 is inserted into the conduit 1. The light guiding member 3 includes a first portion 311 extending from the proximal end to the distal end of the conduit 1 and a second portion 312 extending from the distal end of the first portion 311 to the distal end of the conduit 1. The first portion 311 has a cylindrical structure, and the axis of the first portion 311 is parallel to the axis of the conduit 1. The second portion 312 has an arc-shaped shield structure. The second portion 312 includes a first section 3121 and a second section 3122. The proximal end of the first section 3121 is fixedly connected to the distal end of the first portion 311, and the distal end of the first section 3121 is fixedly connected to the proximal end of the second section 3122. Along the axial direction of the conduit 1, the first section 3121 extends obliquely away from the axis of the conduit 1 from the proximal end to the distal end and the circumferential length gradually increases. The second section 3122 extends in a direction parallel to the axis of the conduit 1 and the circumferential length remains unchanged. The circumferential length of the second section 3122 is equal to the circumferential length of the distal end of the first section 3121. In this embodiment, the thickness of the second portion 312 gradually decreases from the middle to both sides. The projection of the second portion 312 on the cross-section is approximately crescent-shaped. The proximal end of the second portion 312 is arc-shaped, and its outer diameter is equal to the outer diameter of the first portion 311, reducing light loss. The distal end of the second portion 312 gradually inclines from the inner arc side to the outer arc side in the direction from the proximal end to the distal end to form the inclined surface, so that the light exits at a certain oblique angle, expanding the light exit angle. In this embodiment, the material of the light guiding member 3 is optical plastic, and the light guiding member 3 can be integrally formed, and its cost is greatly reduced compared with that of glass fiber. The axial length of the second portion 312 is about 3 cm, and the length ratio of the first section 3121 to the second section 3122 is about 1:1. In other embodiments, the length of the second portion 312 and the length ratio of the first section 3121 to the second section 3122 can be adjusted according to actual needs. In this embodiment, an aluminum film 32 is covered on the outer surface of the light guiding member 3, and a paint layer 33 is covered on the outer surface of the aluminum film 32. In this embodiment, the distal surface of the conduit 1 member is a frosted surface, which can cause diffuse reflection of the outgoing optical fiber and improve the uniformity of the outgoing light.

[0048] In this embodiment, the preparation method of the light guiding member 3 is as follows:

[0049] 1. Adopt an injection molding process to inject the optical plastic into the designed shape of the light guiding member 3.

[0050] 2. Place the injection-molded light guiding member 3 in a vacuum, and use evaporation or sputtering to attach an aluminum film 32 on the outer side surface of the light guiding member 3.

[0051] 3. Paint on the outside of the aluminum film 32 and bake it at a high temperature for shaping.

[0052] 4. Frost or sandblast the distal end of the light guide member 3 to make its surface frosted.

[0053] Specifically, the camera module 4 is located on the side where the center of the second part 312 is located. The distal end of the camera module 4, the distal end of the catheter 1, and the distal end of the light guide member 3 are coplanar.

[0054] Specifically, the catheter 1 is internally provided with a first channel for installing the light guide member 3 that matches the light guide member 3, a second channel for installing the camera module 4 that extends from the proximal end to the distal end of the catheter 1, and the operation part 2 is arranged at the proximal end of the catheter 1.

[0055] In this embodiment, the light source is a cold light source LED lamp 5, which is arranged in the operation part 2, close to the proximal end of the catheter 1, and is located on the axis of the first part 311.

[0056] Embodiment 2

[0057] As Figure 12 shown, this embodiment provides another implementation manner of the endoscope of the present invention, which includes a catheter 1, a lighting assembly, a camera module 4, and an operation part 2. Its basic structure is the same as that of Embodiment 1, and the only difference is that the operation part 2 is provided with a light guide beam channel communicated with the proximal end of the catheter 1. A light guide beam 6 is arranged in the light guide beam channel. One end of the light guide beam 6 is connected to the proximal end of the light guide member 3, and the other end is provided with an external light source.

[0058] The above embodiments efficiently transport the light of the rear light source to the distal end of the catheter 1 through the light guide member 3 with a special structure, which can ensure sufficient brightness while avoiding the risk of excessive temperature at the distal end of the endoscope.

[0059] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. An endoscope, characterized in that: The endoscope comprises a catheter and an illumination assembly, wherein the illumination assembly comprises a light source arranged at the proximal end of the catheter and a light guide component capable of transmitting light from the light source to the distal end of the catheter, wherein the light guide component is inserted in the catheter, wherein the light guide component comprises a first portion extending from the proximal end of the catheter to the distal end and a second portion extending from the distal end of the first portion to the distal end of the catheter, wherein the first portion is a cylindrical structure, wherein the axis of the first portion is parallel to the axis of the catheter, wherein the second portion is an arc-shaped shield structure, wherein the second portion comprises a first section and a second section, wherein the proximal end of the first section is fixedly connected to the distal end of the first section, wherein the distal end of the first section is fixedly connected to the proximal end of the second section, wherein along the axis direction of the catheter, the first section extends obliquely from the proximal end to the distal end in a direction gradually away from the axis of the catheter and the circumferential length gradually increases, wherein the second section extends in a direction parallel to the axis of the catheter and the circumferential length remains unchanged, and the circumferential length of the second section is equal to the circumferential length of the distal end of the first section.

2. The endoscope according to claim 1, characterized in that The thickness of the second portion gradually decreases from the middle to both sides.

3. The endoscope according to claim 1, characterized in that The proximal end of the second part is in an arc shape, and its outer diameter is equal to the outer diameter of the first part.

4. The endoscope according to claim 1, characterized in that The distal end of the second portion is a bevel; And / or, the distal end of the catheter is coplanar with the distal end of the second portion.

5. The endoscope according to claim 1, characterized in that The distal end surface of the catheter component is a frosted surface; and / or the light guide component is made of optical plastic; and / or the axial length of the second portion is 1 to 3 cm.

6. The endoscope according to claim 1, characterized in that An aluminum film is coated on the outer surface of the light guide component.

7. The endoscope according to claim 6, characterized in that A paint layer is covered on the outer surface of the aluminum film.

8. The endoscope according to claim 1, characterized in that: The endoscope also includes a camera module arranged inside the distal end of the catheter, the camera module is located on the side where the center of the second part is located, and the distal end of the camera module is coplanar with the distal end of the catheter and the distal end of the light guide component.

9. The endoscope according to claim 8, characterized in that The interior of the catheter is provided with a first cavity matched with the light guide component for installing the light guide component, and a second cavity extending from the proximal end to the distal end of the catheter for installing the camera module.

10. The endoscope according to claim 1, characterized in that The light source is a cold light source LED lamp; and / or, the endoscope also includes an operating part arranged at the proximal end of the catheter, the light source is arranged in the operating part, or the operating part is provided with a light guide channel connected to the proximal end of the catheter, a light guide is provided in the light guide channel, one end of the light guide is connected to the proximal end of the light guide component, and the other end is provided with the light source.

Images