Tip cap for endoscope

Abstract

A tip cap for an endoscope relates to the field of medical instruments and comprises a cylindrical tip cap body, at least four elastic expansion arms are evenly distributed on the outer side of the tip cap body in the circumferential direction, the elastic expansion arms incline backwards from inside to outside, and an elastic limiting piece is arranged between every two adjacent elastic expansion arms. The distance between the outer side of the elastic limiting piece and the outer end of the elastic expansion arm is 0.3-0.8 time of the length of the elastic expansion arm. In the endoscope entering process, the elastic expansion arm is in a bunchy contraction state under the resistance of the inner wall of the intestinal tract, the resistance is reduced, the digestive endoscope is withdrawn, the elastic expansion arm is expanded, the intestinal tract folds are expanded, the to-be-detected view is exposed, and the detection efficiency and accuracy are improved; the elastic limiting pieces can limit the forward overturning size of the elastic expansion arms, the elastic expansion arms are prevented from overturning excessively, and the stable supporting performance is maintained.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to an endoscope tip cap for intestinal dilation of digestive endoscope, belonging to endoscope auxiliary products. Technical Background

[0002] During the use of a digestive endoscope, a tip cap needs to be installed at the tip of the endoscope to improve the surgical field of view. The existing tip cap for endoscopes is cylindrical and small in size. When performing intestinal examinations, the wrinkles in the intestinal wall cannot be effectively stretched, which increases the difficulty of the intestinal examination process and affects the accuracy of the examination results. Some endoscope tip caps on the market have expansion parts on the side walls, which can provide some support for the wrinkles in the intestinal wall, but they have at least one of the disadvantages of complex structure, high manufacturing cost, and poor expansion support effect. For example, the invention patent application published by the State Intellectual Property Office on July 10, 2018, with the application publication number: CN108261174A, has the defects of complex structure and high manufacturing cost. Utility Model Content

[0003] The utility model aims to provide an end cap for an endoscope which can not only support the intestinal wall wrinkles but also maintain uniform supporting force when squeezed by the wrinkles, has a simple structure, low manufacturing cost and good expansion support effect.

[0004] The technical solution of the utility model is:

[0005] A tip cap for an endoscope comprises a tip cap body in the shape of a circular cylinder, characterized in that at least four elastic expansion arms are evenly distributed on the outer side of the tip cap body, the elastic expansion arms are inclined backward from the inside to the outside, an elastic limiting plate is provided between two adjacent elastic expansion arms, and the distance between the outer side of the elastic limiting plate and the outer end of the elastic expansion arm is 0.3-0.8 times the length of the elastic expansion arm.

[0006] The outer side of the tip cap body described in the utility model is evenly distributed with 6-10 elastic expansion arms upwardly; the angle between the elastic expansion arms and the tip cap body is 100°-145°. The angle between the elastic expansion arms and the tip cap body is preferably 120°-130°.

[0007] The elastic expansion arm described in the utility model is in the shape of a long strip, the width of the elastic expansion arm is 2.5mm-6mm, the thickness is 1mm-2.5mm; the thickness of the elastic limit piece is 0.25mm-0.5mm. It can be partially stretched and turned over to improve the supporting force.

[0008] The outer end surface of the elastic expansion arm and the adjacent side surface are connected via a curved transition, thereby avoiding stimulation and damage to the digestive tract mucosa caused by the insertion and withdrawal of the endoscope during the examination.

[0009] The tip cap body described in the utility model includes a tip non-matching portion, an assembly portion and a terminal matching portion, the assembly portion is located between the tip non-matching portion and the terminal matching portion, an observation hole is provided in the center of the tip non-matching portion, an assembly hole is provided in the center of the assembly portion, and a matching hole is provided in the center of the terminal matching portion; the diameter of the observation hole is smaller than the diameter of the assembly hole, and the matching holes include a stabilizing hole on the front side and an introduction hole on the rear side, the stabilizing hole is in a frustum shape with a diameter gradually decreasing from front to back, and the introduction hole is in a frustum shape with a diameter gradually increasing from front to back. The tip non-matching portion, the assembly portion and the terminal matching portion are integrally formed, the tip cap body is cylindrical, the axes of the observation hole, the assembly hole, the stabilization hole and the introduction hole coincide and are connected front to back; the height of the stabilization hole is 0.6-3mm, preferably 1-1.5mm; the taper of the stabilization hole is 0.6-10°, preferably 3-5°; the height of the introduction hole is 1.5-5mm, preferably 2.5-3.5mm; the taper of the introduction hole is 20-50°, preferably 30-45°.

[0010] The tip cap body, elastic expansion arm and elastic limit plate described in the utility model are made of medical silicone material with a Shore hardness of 30-60°. Preferably, the tip cap body, elastic expansion arm and elastic limit plate are made of medical silicone material with a Shore hardness of 45-50°; the tip cap body and the elastic expansion arm are integrally formed.

[0011] The silicone material used in the utility model is relatively soft, and the discomfort after contacting with the human mucosa is greatly reduced. The elastic expansion arm forms an acute angle with the digestive endoscope. When entering the intestine, the elastic expansion arm is subjected to the resistance of the inner wall of the intestine and is in a bundle-like contraction state, reducing the resistance. When the tip cap body reaches the position to be detected, the digestive endoscope is withdrawn, thereby driving the elastic expansion arm to open, and then stretching the intestinal folds, exposing the field of view to be detected, and improving the detection efficiency and accuracy. In the process of withdrawing the digestive endoscope, the rear part of the elastic expansion arm can be expanded and flipped forward, and the arc-shaped support part formed contacts with the inner wall of the intestine for support. The forward support has a large range, stable support force, small resistance, and is not easy to damage the intestinal mucosa; the elastic limit plate can limit the size of the elastic expansion arm flipping forward, prevent the elastic expansion arm from over-flipping, and maintain stable support performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 yes Figure 1 AA section view.

[0014] Figure 3 It is a three-dimensional structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] like Figure 1-Figure 3 The tip cap for endoscope shown in the figure comprises a tip cap body 1 in the shape of a circular cylinder, wherein the tip cap body 1 comprises a tip non-matching portion 1-2, an assembly portion 1-4 and a terminal matching portion 1-6, wherein the assembly portion 1-4 is located between the tip non-matching portion 1-2 and the terminal matching portion 1-6, wherein a cylindrical observation hole 1-1 is provided at the center of the tip non-matching portion 1-2, a cylindrical assembly hole 1-3 is provided at the center of the assembly portion 1-4, and a matching hole is provided at the center of the terminal matching portion 1-6; the matching holes comprise a stabilizing hole 1-5 at the front side and an introduction hole 1-7 at the rear side. The diameter of the observation hole 1-1 is smaller than the diameter of the assembly hole 1-3, and a limiting step is formed inside the tip cap body. When the tip cap body is assembled with the endoscope, the accuracy of the assembly position can be ensured and the assembly speed can be improved; the stabilization hole 1-5 is in the shape of a cone with a diameter gradually decreasing from front to back, and the maximum diameter of the stabilization hole 1-5 is the same as the diameter of the assembly hole. After the tip cap body is assembled at the tip end of the endoscope, the stabilization hole 1-5 can prevent the tip cap from falling from the tip end of the endoscope; the introduction hole 1-7 is in the shape of a cone with a diameter gradually increasing from front to back, and the minimum diameter of the introduction hole 1-7 is the same as the minimum diameter of the stabilization hole, and the maximum diameter is larger than the diameter of the assembly hole, which makes it easier to assemble the tip cap body with the endoscope and shortens the assembly time. The tip non-matching part, the assembly part and the terminal matching part are integrally formed, and the tip cap body is cylindrical. The axes of the observation hole, the assembly hole, the stabilizing hole and the introduction hole coincide and are connected front and back; the height of the stabilizing hole is 1.2mm; the taper of the stabilizing hole is 3°; the height of the introduction hole is 3mm; the taper of the introduction hole is 30°, and the technical effect produced is stable. There are 6 elastic expansion arms evenly distributed on the outer side of the tip cap body 1, and the 6 elastic expansion arms are symmetrically distributed along the tip cap body. The elastic expansion arm 3 is tilted backward from the inside to the outside, and the angle between the elastic expansion arm 3 and the tip cap body (axis) is 125°. When the angle between the elastic expansion arm 3 and the tip cap body (axis) is within the range of 120°-130°, when the endoscope is advanced, the elastic expansion arm 3 can be retracted inward, and when the endoscope is withdrawn, the rear end of the elastic expansion arm can be smoothly expanded and supported by the contact with the folds of the inner wall of the digestive tract. An elastic limiting plate 2 is provided between two adjacent elastic expansion arms, and the distance between the outer side 2-1 of the elastic limiting plate 2 and the outer end of the elastic expansion arm is 0.6 times the length of the elastic expansion arm 3; as can be seen from the figure, the inner side of the elastic limiting plate 2 is connected to the outer side wall of the tip cap body, and the elastic limiting plate 2 is fan-shaped. After the rear end of the elastic expansion arm expands outward and is propped up until the rear elastic limiting plate 2 is fully unfolded, the rear end of the elastic expansion arm is forced to flip forward, and an arc-shaped supporting portion is formed at the rear end of the elastic expansion arm, which contacts and supports the inner wall of the intestine. During the retraction of the mirror, the supporting force is stable, the tip cap moves backward steadily, and it is not easy to jump; the elastic limiting plate can limit the excessive flipping of the rear part of the elastic expansion arm to maintain sufficient supporting force.

[0016] The tip cap body, elastic expansion arm and elastic limiter described in this embodiment are made of medical silicone material with a Shore hardness of 45°. The elastic expansion arm is in the shape of a rectangular long strip, with a width of 4mm and a thickness of 1.5mm; the thickness of the elastic limiter is 0.4mm; during the process of entering the mirror, the elastic expansion arm can be smoothly retracted inward to reduce the resistance to entering the mirror; during the process of withdrawing the mirror, the rear end of the elastic expansion arm is blocked from contacting the inner wall of the intestine, and after the elastic expansion arm expands outward and opens, its rear end continues to expand outward and flips forward; the elastic expansion arm flips forward 3-8mm from its rear end face to form an arc-shaped support portion; the elastic limiter is stressed and stretched in the circumferential direction, and the outer 2-1 part of the elastic limiter is slightly bent, which can limit the elastic expansion arm on its inner (front) side from flipping forward. The outer end face of the elastic expansion arm and the other side faces (upper side, lower side, left side and right side) of the adjacent elastic expansion arm are connected by a smooth transition through a curved surface; to avoid stimulation and damage to the digestive tract mucosa during the examination process.

[0017] The silicone material used in the utility model is relatively soft, and the discomfort after contacting with the human mucosa is greatly reduced. The elastic expansion arm forms an acute angle with the digestive endoscope. When entering the intestine, the elastic expansion arm is subjected to the resistance of the inner wall of the intestine and is in a bundle-like contraction state, reducing the resistance. When the tip cap body reaches the position to be detected, the digestive endoscope is withdrawn, thereby driving the elastic expansion arm to open, and then stretching the intestinal folds, exposing the field of view to be detected, and improving the detection efficiency and accuracy. In the process of withdrawing the digestive endoscope, the rear part of the elastic expansion arm can be expanded and flipped forward, and the arc-shaped support part formed contacts and supports the inner wall of the intestine. The forward support range is large, the supporting force is stable, the resistance is small, and it is not easy to damage the intestinal mucosa; the elastic limit plate can limit the size of the elastic expansion arm flipping forward, prevent the elastic expansion arm from over-flipping, and maintain stable support performance. The utility model has the advantages of simple structure, low manufacturing cost, and good expansion support effect.

Claims

1. An end cap for an endoscope, comprising an end cap body in a circular cylindrical shape, characterized in that: At least four elastic expansion arms are evenly distributed upward on the outer side of the tip cap body. The elastic expansion arms are inclined backward from the inside to the outside. An elastic limiting plate is provided between two adjacent elastic expansion arms. The distance between the outer side of the elastic limiting plate and the outer end of the elastic expansion arm is 0.3-0.8 times the length of the elastic expansion arm.

2. The endoscope tip cap according to claim 1, characterized in that: The outer side of the tip cap body is evenly distributed with 6-10 elastic expansion arms upward; the angle between the elastic expansion arms and the tip cap body is 100°-145°.

3. The endoscope tip cap according to claim 1, wherein: The elastic expansion arm is in the shape of a long strip, with a width of 2.5mm-6mm and a thickness of 1mm-2.5mm; the thickness of the elastic limiting piece is 0.25mm-0.5mm.

4. The endoscope tip cap according to claim 1, characterized in that: The outer end surface of the elastic expansion arm and its adjacent side surface are connected via a curved surface transition.

5. The endoscope tip cap according to any one of claims 1 to 4, characterized in that: The tip cap body includes a tip non-matching portion, an assembly portion and a terminal matching portion, the assembly portion is located between the tip non-matching portion and the terminal matching portion, an observation hole is provided in the center of the tip non-matching portion, an assembly hole is provided in the center of the assembly portion, and a matching hole is provided in the center of the terminal matching portion; the diameter of the observation hole is smaller than the diameter of the assembly hole, and the matching holes include a stabilizing hole on the front side and an introduction hole on the rear side, the stabilizing hole is in the shape of a cone with a diameter gradually decreasing from front to back, and the introduction hole is in the shape of a cone with a diameter gradually increasing from front to back.

6. The endoscope tip cap according to claim 5, characterized in that: The height of the stabilizing hole is 0.6-3mm; the taper of the stabilizing hole is 0.6-10°; the height of the introduction hole is 1.5-5mm; the taper of the introduction hole is 20-50°.

7. The endoscope tip cap according to claim 6, characterized in that: The tip cap body, the elastic expansion arm and the elastic limit plate are made of medical silicone material with a Shore hardness of 30-60°.

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