endoscope

Abstract

An endoscope with an LED light source unit provided at a distal end rigid portion that constitutes a distal end portion of an endoscope insertion portion, wherein the LED light source unit comprises: an LED ceramic substrate; an LED light source mounted on a distal end side of the LED ceramic substrate; an LED cable that is inserted in the endoscope insertion portion, guided to the distal end portion and connected to a conductive pattern of the LED ceramic substrate; and a reinforcement member that is integrally fixed to the LED ceramic substrate and covers a ceramic cutout portion provided for exposing the conductive pattern of the LED ceramic substrate.

Description

technical field [0001] The present invention relates to an endoscope in which a light-emitting element is arranged as an illumination unit at a distal end portion of an insertion unit. Background technique [0002] Endoscopes are widely used in the medical and industrial fields. In an endoscope, the object of diagnosis or observation is the inside of a living body, a mechanical device, or the like. Therefore, when performing endoscopic observation, a light source for illuminating the observation object is required. [0003] A general endoscope device includes an endoscope and a light source device as an external device of the endoscope. The illumination light emitted by the light source device is transmitted through a light guide inserted into the endoscope. The transmitted illumination light is emitted toward the observation object from the illumination window arranged at the front end of the insertion portion. [0004] In recent years, endoscopes have been proposed in ...

AI Technical Summary

Problems solved by technology

[0010] However, in the ceramic substrate 8 for LEDs provided with the housing portion 8a, the stress concentrates on the housing portion 8a, which becomes the main cause of cracking of the substrate 8.

For example, in figure 2 In the shown LED unit assembly work, when the LED light source unit 4 is assembled in the recessed portion of the lens cover 10 fixed on the front end rigid member 3, that is, the lighting arrangement portion 11, the direction of the arrow Y2 is applied to the accommodating portion 8a by mistake. When the force is applied, the stress concentrates on the corner 8b, and the ceramic substrate 8 for LED will be damaged.

[0011] And, in the observation unit assembly operation after the LED unit assembly operation, if image 3 As shown, when the observation unit 5 is assembled on the front end rigid component 3, the observation unit 5 is brought into contact with the LED light source unit 4, or the operator's finger touches the LED light source unit 4, and a force in the direction of arrow Y3 is applied to the accommodating portion 8a. When the stress is concentrated on the corner 8b, the ceramic substrate 8 for LED may be damaged.

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