Abstract: A high-frequency treatment device for an endoscope has an elongated piercing portion. A sleeve-like first electrode is disposed at a distal end portion of this piercing portion. A bar-like second electrode is coaxially disposed within the first electrode. A sleeve-like insulative layer is interposed between the first electrode and the second electrode.

Abstract: An optical fibers bundle 30 for the use of illumination light transmission is received in a second receiving space 14 of an insert portion 10, and an objective unit 40 is received in a distal end portion of a first receiving space 13. A holder 60 is slidably inserted in the first receiving space 13. An image sensor 65 is supported on a distal end portion of the holder 60. Signal lines 66 from the image sensor 65 extends through the holder 60 and is introduced outside. The objective unit 40 and the holder 60 are threadingly connected with each other.

Abstract: A liquid crystal display unit includes a first and a second substrate. A plurality of tiny projections are formed on the first substrate in a scattered arrangement. The tiny projections each have a generally semi-spherical configuration. Top portions of the projections each having a convexly curved surface are contacted with the second substrate, thereby a gap for filling a liquid crystal being formed between the first substrate and the second substrate. The tiny projections are formed by projecting a laser beam to the first substrate.

Abstract: The endoscope unit 1 includes a flexible tube 3 having a deflectable portion at one end and a proximal housing 4 at the other end. The deflectable portion of the flexible tube 3 has a hard tip 2 at its distal end and the tip 2 has an observation opening 11. The flexible tube 3 has a optical assembly guide channel 10, extending from the proximal housing 4 to the observation opening 11, for removably fitting an optical assembly 9. Optical assembly 9 includes a bundle of optical fibres covered by an external cover 18. The bundle of optical fibres has an objective lens 15 at one end and eyepiece 16 at the other end. A watertight sheath 19 is provided, the watertight sheath 19 being transparent near objective lens 15.

Abstract: An endoscope unit includes an endoscope having an insertion portion and a fluid supply instrument mounted on the insertion portion. The fluid supply instrument comprises a thin resilient tube. This resilient tube is intimately attached to an outer periphery of the insertion portion of the endoscope and radially expansible. A supply member is connected to a basal end of the resilient tube. When fluid from this supply member is supplied to the basal end of the resilient tube, the resilient tube is radially expanded and a fluid passage is formed between the resilient tube and the insertion portion of the endoscope. The fluid is discharged from a distal end of the resilient tube.

Abstract: In an adhesive sprayer for a living body, a hard insert portion extends from a sprayer body, a bendable portion extends from a distal end of the insert portion, and a nozzle portion is disposed on a distal end of this bendable portion. Gas from a gas inlet port formed in the sprayer body is injected from a gas injection port formed in the nozzle portion after passing through a passage which is allowed to extend through the interiors of the sprayer body, insert portion and bendable portion. Adhesive from an adhesive inlet port formed in the sprayer body is injected from an adhesive discharge port formed in the nozzle portion after passing through another passage which is allowed to extend through the interiors of the sprayer body, insert portion, and bending portion. The bending portion is bent by controlling a control member mounted on the sprayer body via a control cable extending through the interiors of the sprayer body, insert portion and bendable portion.

Abstract: An optical fibers bundle 30 for the use of illumination light transmission is received in a second receiving space 14 of an insert portion 10, and an objective unit 40 is received in a distal end portion of a first receiving space 13. A holder 60 is slidably inserted in the first receiving space 13. An image sensor 65 is supported on a distal end portion of the holder 60. Signal lines 66 from the image sensor 65 extends through the holder 60 and is introduced outside. The objective unit 40 and the holder 60 are threadingly connected with each other.

Abstract: A pair of forceps cups disposed on a distal end of an elongated guide tube is opened and closed by remote control of a control mechanism disposed on a rear end of the guide tube through a wire within the guide tube. The control mechanism includes a holder having a rod portion, and a slider slidably disposed on the rod portion. A receiving member is mounted on a rear end portion of the wire at a forward position of the slider. This receiving member is biased backwardly by a compressed coil spring. The slider is not connected to the rear end portion of the wire. During the course of a forward movement of the slider, the slider contacts the receiving member and causes the wire to move forwardly through this receiving member. As a consequence, the pair of forceps cups is opened. When the slider is moved backwardly, the wire is pulled under the effect of the coil spring. Consequently, the pair of forceps cups is closed.

Abstract: Converged laser beam are irradiated, at right angles, to the surface of a workpiece which is made of glass and supported in a horizontal posture, so that the surface of the workpiece is locally heated and melted. The surface of the workpiece is formed into a convexly curved surface under the effect of surface tension occurrable to the glass material at the time the surface of the workpiece is melted. By hardening the workpiece, a micro lens having the convexly curved surface is formed.

Abstract: A tracheal airway apparatus includes an insert tube and an endoscope. The endoscope includes a body and an insert portion extending forwardly of the body and inserted into the insert tube. The insert portion is of a double tubular structure. An inner tube of the insert portion is flexible and receives an illumination light transmission element and an image transmission element. An outer tube of the insert portion has a semi-hard property and is detachably attached to a front end part of the body. A space is formed between an inner periphery of the outer tube and an outer periphery of the inner tube.

Abstract: An enlarging optical system having an objective lens and an ocular lens is received in a body of a microscope. A beam splitter is received in the body on an optical path of the enlarging optical system. This beam splitter is disposed between the objective lens and the ocular lens. A monitor television is also received in the body. An image obtained by an endoscope is displayed in this monitor television. The image displayed in the monitor television is reflected by the beam splitter toward the ocular lens.

Abstract: A device that provides a control system which is capable of positively preventing a semiconductor from suffering from latch up. In order to prevent this latch up, a control circuit controls the semiconductor through a power source switch. The control circuit is capable of supplying a constant voltage to a power source terminal of the semiconductor when it is electrically connected to the power source circuit by turning on the power source switch, and thereafter supplying a control signal to a control terminal of the semiconductor. The control circuit is capable of stopping the output of the control signal to the control terminal and then stopping the supply of voltage to the power source terminal when disconnected from the power source circuit by turning off the power source.

Abstract: A medical instrument for treating sinusitis has a body, an insert tube extending from a distal end of the body, and an angle portion extending from a distal end of the insert tube. The angle portion is bent by a remote control member mounted on the body, through a wire. A motor is mounted on the body. The medical instrument also has a brush. This brush has an elongated rotation transmission portion extending through the insert tube and the angle tube, and a brush portion attached to a distal end of the rotation transmission portion. A basal portion of the rotation transmission portion is connected to the motor. The brush portion is allowed to protect from a distal end of the angle tube. At least that portion of the rotation transmission portion extending through the angle tube is bendable. Therefore, when the motor is rotated in the state that the angle portion is bent, the brush portion is rotated.

Abstract: An endoscope suitable for inspecting a water service pipe, etc. is disclosed. The endoscope comprises an operating body and a flexible insert tube structure extending from the operating body. The insert tube structure has a flexible insert body as in a regular endoscope. The insert tube structure further has a jacket disposed on an outer periphery of the insert body and adapted to enhance a smooth reciprocal movement of the insert tube structure. The jacket is formed in a cylindrical braid by braiding a plurality of flat straps in cross-section. These straps are formed of a resin having a small friction coefficient.

Abstract: The distal ends of control wires of a distal tip deflection control mechanism are fixed to the distal tip of an endoscope. The distal ends of the control wires are spirally coiled up several times and form a cylinder, and the cylinder is fitted and fixed to the rear end or front end of the distal tip. In an alternate embodiment, the distal ends of the control wires are spirally coiled up several times and form a fitting body and the distal ends of an image guide, a charge coupled device (CCD), a light guide, or any other various kind of diagnostic tool or tube are fitted within the fitting body. In another version, the distal ends of the control wires are spirally coiled up several times around a bundle of distal ends of an image guide, a CCD, a light guide, or other various kinds of diagnostic tools or tubes, and the distal ends of the control wires and the bundle of distal ends of the other components are integrally fixed in the formed body.

Abstract: A direct vision/side vision exchangeable endoscope having two stages of small-diameter and large-diameter threads differing in their diameter are formed on the distal end of the examining portion of the endoscope. A threaded portion to be engaged with the small-diameter thread is formed on the inner side of the rear end of an attachment, and flanges are formed in the vicinity of both ends of the attachment, and an anchoring ring having a thread to be engaged with the large-diameter thread, formed on the inner side of the top end thereof, and an anchoring portion for anchoring the flanges, formed on the inner side of the rear end thereof, is freely set between both the flanges of the attachment.

Abstract: An endoscope cover comprising a cylindrical end rigid cover portion composed a flexible material, which is fitted to an endoscope to cover a distal end rigid portion of the endoscope. A transparent window arranged on a closed face formed on the distal end of the rigid cover to confront at least an observation port and an illuminating port, which are arranged on the distal end of the endoscope, and a bag-shaped covering member having a length covering at least an intermediate conduit portion of the endoscope, which is attached to the rear part of the endoscope. A groove or notched face is formed in the longitudinal direction of the outer periphery of the distal end rigid portion of the endoscope and an anchoring groove is formed on the circumferential face portion. Anchoring projections are formed at confronting positions on the inner circumferential face of the rigid cover and are fitted in the anchoring groove formed in the distal end rigid portion to attach the rigid cover to the top end rigid portion.

Abstract: An anchoring structure for an endoscope cover comprising a cylindrical rigid cover composed of an elastic material, which is fitted to an endoscope to cover a front end rigid portion of the endoscope. A transparent window is arranged on a closed face formed on the front end of the rigid cover to face at least an observation port and an illuminating port, which are arranged on the top end of the endoscope. A bag-shaped covering member having a length covering at least an intermediate conduit portion of the endoscope is attached to a rear part of the endoscope. An anchoring concave portion is formed at a predetermined part of the intermediate conduit portion, a notched face is formed on the circumferential face of the top end rigid portion and an anchoring groove is formed on the circumferential face.

Abstract: An endoscope cover comprising a cylindrical rigid cover composed of an elastic material, which is fitted to an endoscope to cover a top end rigid portion of the endoscope. A transparent window arranged on a closed face formed on the top end of the rigid cover to confront at least an observation port and an illuminating port, which are arranged on the top end of the endoscope, and a bag-shaped covering member having a length covering at least an intermediate conduit portion of the endoscope, which is attached to the rear part of the endoscope. A groove or notched face is formed in the longitudinal direction of the outer periphery of the top end rigid portion of the endoscope and an anchoring groove is formed on the circumferential face portion.

Abstract: A water-tight endoscope comprising a flexible tube zone, a handle zone and a guide tube zone is disclosed. Each of the flexible tube zone, the handle zone and the guide tube zone has a water-tight structure, and moreover, a connecting part for each zone has a water-tight structure. An opening for connecting the interior of the endoscope to the outer air is formed in the guide tube zone and a waterproof and breathable filter is arranged in this opening. By this arrangement, the interior of the endoscope is connected to the outer air through the waterproof and breathable filter.