Flexible tube for endoscope and method for producing same

A manufacturing method and technology for endoscopes, which are applied in the directions of endoscopes, applications, telescopes, etc., can solve problems such as undocumented and unproven enlightenment, and achieve the effect of good forming accuracy

Inactive Publication Date: 2012-07-04
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above-mentioned Patent Documents 1 and 2, the above-mentioned problems are not considered at all, and the relationship between the hardness after molding of the two resins and the melt viscosity at the molding temperature is neither described nor suggested.

Method used

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  • Flexible tube for endoscope and method for producing same
  • Flexible tube for endoscope and method for producing same
  • Flexible tube for endoscope and method for producing same

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0035] In the electronic endoscope showing the flexible tube according to the present invention figure 1 Among them, an electronic endoscope 2 widely used for medical purposes includes an insertion part 3 inserted into a body cavity, a main body operation part 5 connected to the base end part of the insertion part 3, and a general-purpose software connected to a processor device or a light source device. Line 6.

[0036] The insertion part 3 includes: a flexible tube part 3a connected to the main body operation part 5, an angle part (angul) 3b connected to the flexible tube part 3a, and an imaging device for imaging inside the body cavity connected to the front end thereof. (not shown) front end portion 3c. The flexible tube portion 3a occupying most of the length of the insertion portion 3 has flexibility over almost its entire length, and the portion inserted into a body cavity or the like has a more flexible structure.

[0037] Such as figure 2 As shown, the flexible tube...

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Abstract

Disclosed is a flexible tube (10), comprising a flexible tube material (14) and a double-layered outer skin layer (15) which consists of an inner layer (17) coating the entire peripheral face of the flexible tube material (14) and an outer layer (18) coating the entire peripheral face of the inner layer (17). The outer skin layer (15) is obtained by supplying two kind of resins, which are overlaid in a molten state, into a single mold at the same time to form the double-layer laminate consisting of the inner layer (17) and the outer layer (18). As the resins forming the inner layer (17) and the outer layer (18), a combination of a soft resin and a hard resin, wherein the difference in 100% modulus value that indicates the hardness after molding is 10 MPa or more and the difference in melt viscosity at a molding temperature of 150-200oC that indicates the fluidity in the molten state is 2500 PaS or less, should be selected.

Description

technical field [0001] The present invention relates to a flexible tube for an endoscope in which an outer skin layer is formed by multi-layer molding of various resins, and a method for manufacturing the flexible tube for an endoscope. Background technique [0002] A medical endoscope for observing a patient's body cavity is already known. The flexible tube, which is a main part constituting the insertion part of an endoscope inserted into a body cavity, includes a helical tube formed by winding a metal tape sheet in a helical shape, and an outer skin layer made of urethane (Uletan) and other resins are covered and molded on the surface of the cylindrical mesh body. The outer skin layer is overmolded by extrusion molding on the outer peripheral surface of the flexible tube raw material in which the spiral tube is covered with a cylindrical mesh body. Such a flexible tube preferably has a high flexibility (soft) at the front end for easy insertion of the insertion portion ...

Claims

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Application Information

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IPC IPC(8): A61B1/00G02B23/24
CPCG02B23/2476A61B1/00078A61M25/0045A61B1/0055A61B1/0011A61B1/0056
Inventor 高桥伸治
Owner FUJIFILM CORP
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