Patent ID: 8641606

Claim:
An endoscope apparatus, including: a long insertion portion that is inserted into an object to be examined; an illumination portion that irradiates illumination light at an observation target inside the object to be examined; a distal end portion provided at a distal end of the insertion portion and including a cylindrical portion formed in a cylindrical shape; an image pickup portion including an image pickup device that photo-electrically converts reflected light which is reflected from the object to be examined, and which is captured in the distal end portion, and a rectangular image pickup substrate portion provided at a rear side of the image pickup device; a cover glass arranged at a front of the image pickup device, the cover glass configured to protect a front surface of the image pickup device; an image pickup cover formed integrally with the image pickup device of the image pickup portion and the cover glass, for protecting the image pickup device of the image pickup portion and the cover glass; a signal wire connected to the image pickup substrate portion of the image pickup portion, the signal wire transmitting an electric signal from the image pickup device and the image pickup substrate portion; and a heat radiating member having a first end portion and a second end portion and configured by bundling multiple wire elements made of a high thermal conductivity material, wherein a distal end of the first end portion is arranged on a side of the image pickup substrate portion of the image pickup portion, to be extended to the proximal end side of the insertion portion, wherein the image pickup portion includes, at a portion where the image pickup cover for protecting the image pickup device is located, a maximum external diameter portion having an external diameter larger than an external diameter of a portion where the image pickup substrate portion is located; the signal wire is provided on a more proximal end side than the maximum external diameter portion of the image pickup portion; the distal end portion includes four space regions which encircle four outer peripheral surfaces corresponding to respective sides of the rectangular image pickup substrate portion and are positioned between the four outer peripheral surfaces and an inner peripheral surface in the cylindrical portion of the distal end portion, the four space regions formed at a position which is on a more proximal end side than the maximum external diameter portion and which is on a more distal end side than a rear end of the image pickup substrate portion in a state where the image pickup portion is provided in the cylindrical portion of the distal end portion; the first end portion of the heat radiating member forms a broad portion which is formed to have a wider width than a portion formed by bundling the wire elements and the broad portion of the first end portion is disposed in at least one of the four space regions formed in the distal end portion.