一种远端构件、插入部及内窥镜

Abstract

本实用新型涉及医疗器械技术领域，并具体公开了一种远端构件、插入部及内窥镜，所述远端构件呈环状结构，所述远端构件具有径向贯穿的定位缺口，所述定位缺口具有在周向上分布的第一侧壁和第二侧壁，所述第一侧壁与配合构件的定位块周向相抵，在所述远端构件和所述配合构件周向定位配合的情况下，所述第二侧壁与所述定位块之间限定出避让间隙，所述避让间隙用于避让器件；上述方案中，远端构件可通过定位缺口的第一侧壁与定位块相抵来实现周向上的定位装配，此时定位缺口的第二侧壁与定位块之间形成有避让器件的避让间隙，例如器械管的部分可位于避让间隙内，从而有利于器械管弯曲应力的释放，从而大大减缓器械管与插入部远端之间的抵接作用力。

Claims

1. A distal member applied to an insertion portion of an endoscope, characterized by, The distal component (300) has an annular structure and a radially penetrating positioning notch (310). The positioning notch (310) has a first sidewall and a second sidewall distributed in the circumferential direction. The first sidewall abuts against the positioning block (210) of the mating component (200) in the circumferential direction. When the distal component (300) and the mating component (200) are circumferentially positioned and mated, a clearance is defined between the second sidewall and the positioning block (210). The clearance is used to avoid the device.

2. The distal component according to claim 1, characterized in that, The insertion part includes an active bending section (100), which includes a plurality of snake-like segments connected end to end, and two adjacent snake-like segments are rotatably connected by a riveting part (110). The distal component (300) is the most distal serpentine segment in the active bending segment (100), and the mating component (200) is a lens mount; Alternatively, the distal component (300) is an intermediate component connecting the most distal serpentine segment of the active bending segment (100) and the lens mount, and the mating component (200) is the lens mount; Alternatively, the distal component (300) may be a lens mount, and the mating component (200) may be the most distal serpentine segment in the active bending segment (100); Alternatively, the distal component (300) may be a lens mount, and the mating component (200) may be an intermediate component connecting the distal serpentine segment of the active bending segment (100) and the lens mount.

3. An insertion portion characterized by, Includes a mating member (200) and a distal member (300) as described in any one of claims 1 to 2, wherein the mating member (200) is a lens mount, the mating member (200) has a positioning block (210), the positioning block (210) is convex along the axial direction of the mating member (200), the positioning block (210) is located within the positioning notch (310), and the positioning block (210) abuts against the first sidewall of the positioning notch (310) circumferentially.

4. The insert of claim 3, wherein The mating component (200) is also provided with a support structure (220), the radial inner side of which has a covering surface (221), the covering surface (221) being adapted to the outer peripheral surface of the distal end of the instrument tube (400).

5. The insert of claim 4, wherein The support structure (220) is connected to the positioning block (210), and the support structure (220) is located radially inside the positioning block (210).

6. The insert of claim 5, wherein The support structure (220) extends axially along the mating member (200), and the distal end of the support structure (220) extends into the mating member (200) or to the distal end face of the mating member (200).

7. The insert of claim 6, wherein The support structure (220) transitions in an arc shape with the inner wall of the mating member (200) at both ends of its circumference.

8. The insert of claim 7, wherein, The support structure (220) also has a radial support surface (222) that is in contact with the inner wall of the distal member (300).

9. The insert of claim 8, wherein, The positioning block (210) has a circumferential stop surface (211) adjacent to the radial support surface (222).

10. An endoscope characterized by comprising: The insertion portion according to claim 9. The insertion portion according to claim 9.

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