PROBLEM TO BE SOLVED: To provide a disposable covering body for preventing contamination of an endoscopic device, in which flexibility, strength, optically high accuracy, and the like required for the covering body for preventing the contamination can be sufficiently satisfied, and advanced reliability, therefore, is provided, while overall manufacturing costs can be reduced.SOLUTION: The device includes a body part 11 for covering an external surface of an insert part 2 with a diameter of approximately 1 mm, and a light guide part 12. The body part 11 is formed by an ultrafine tube made from elastomer of a flexible polyamide group as material. The light guide part 12 is formed by transparent thermosetting silicone rubber and has translucency. When the light guide part 12 is molded, the light guide part 12 and the body part 11 are integrated by inserting an end part of the body part 11 into a molding die 22. An exterior surface shape of the light guide part 12 when being molded is defined by the molding die 22, while an interior shape is defined by the body part 11 and a soluble inner component 20 loaded in advance inside the end part of the body part 11. After demolded, the soluble inner component 20 is melted and removed by heated water.COPYRIGHT: (C)2012,JPO&INPIT【課題】防染用被覆体に要求される屈曲性、強度、光学的に高い精度などを十分に満足でき、したがって高度の信頼性を備え、しかも全体の製造コストを削減して使い捨てが可能な、内視装置の防染用被覆体を提供する。【解決手段】直径が1mm前後の挿入部2の外面を覆う本体部11と、導光部12とを備えている。本体部11は屈曲可能なポリアミド系のエラストマーを素材とする極細チューブで形成する。導光部12は、透明な熱硬化性のシリコーンゴムで形成されて透光性を備えている。導光部12と本体部11とは、導光部12の成形時に、本体部11の端部を成形用金型22の内部にインサートして一体化する。成形時における導光部12の外面形状を成形用金型22で規定し、内面形状は、本体部11、および本体部11の端部内に予め装填した水溶性中子20で規定する。離型後に水溶性中子20を温水で溶融除去する。【選択図】図6
