Fuji Photo Optical Co., Ltd.

Fujifilm Corporation

Joji Watanabe

Naotake Mitsumori

Kazuhiro Sakamoto

Akira Ogura

Yuichi Torii

Tadasu Kobayashi

Hiroshi Kuboya

Harou Akiba

Nobuyuki Miura

Shuichi Yamataka

A flexible channel to be incorporated into an endoscopic insertion portion having a flexible portion at least in part of its length, for the purpose of providing a flexible passage internally of the endoscopic insertion portion. The flexible channel is composed of a flexible tube with a helical groove on and around its outer periphery, and a reinforcing coil fitted in the helical groove on the flexible tube. At the root of the helical groove, angular projections are formed at intervals in the longitudinal direction and the reinforcing coil is tightly pressed tightly against the angular projections.

Flexible channel for use on endoscope

An optical lens assembly containing a plural number of lens elements for an optical system to be incorporated into a tip end portion of an endoscopic insertion instrument. Of a plural number of lenses which constitute an optical system, a metal film layer is formed on confronting outer peripheral surface portions of at least two adjacently located lenses, outside respective effective lens areas, and the two adjacently located lenses are assembled and fixedly bonded together by applying solder to the outer peripheral surface portions with a metal film layer.

Lens assembly for endoscopic lens system

An ultrasonic cleaning apparatus of the present invention has a cleaning vessel which is made of a synthetic resin, while an ultrasonic vibration units are respectively disposed to face a hand control part, a top end, and a connector of an endoscope which is contained in the cleaning vessel. The ultrasonic vibration units individually have a diaphragm which is disposed at an opening of the cleaning vessel and ultrasonic vibrators which are adhered at the bottom of the diaphragm. An elastic body is provided between the cleaning vessel and the diaphragm.

Ultrasonic cleaning apparatus for an endoscope

In an endoscope apparatus, a suction button is detachable from a manual control part, and rubber parts such as O-rings and a knob are attached to the suction button. The rubber parts are made of a perfluoromonomer rubber material that is obtained by vulcanizing a material having a perfluoromonomer structure in which an average molecular weight is not greater than 2000. Thus, the rubber parts have excellent chemical resistance, heat resistance and mechanical strength. Therefore, the suction button can be both disinfected with new types of disinfectant having powerful oxidizing properties and sterilized in an autoclave.

Endoscope rubber part having a perfluoromonomer structure

An anti-fogging lens device, having a plural number of optical glass lens elements mounted within a lens barrel, including a first lens element located in a foremost position on the side of a subject and a second lens element located behind and at a space from the first lens element. A spacer ring is fitted in the lens barrel to set apart the first and second lens elements by a gap space of a predetermined width. The spacer ring is formed of a material having higher thermal conductivity than the lens elements and, on the inner peripheral side thereof, provided with a moisture depositing surface which is formed in a non-flat shape to increase its surface area. The lens barrel is fitted in a cylindrical member, and a seal pocket, to be packed with a seal material, is formed between the lens barrel and the cylindrical member to stop clearances between these two members with a secure hermetical seal.

Growing community of inventors

Saitama, Japan

Joji Watanabe