Patent ID: 8840545

Claim:
An endoscope comprising: an insertion portion configured to be inserted into a subject; an operation portion which is connected to a proximal end of the insertion portion, and which includes a first outer casing outside of the operation portion, the first outer casing being held by a user; a light source provided in the operation portion; a heat transmission frame having good thermal conductivity and being at least partially electrically insulative, the heat transmission frame being provided with the light source in the operation portion, and being configured to transmit heat generated by the light source, and an external heat radiation part which is connected to the heat transmission frame, is at least partially exposed to the outside of the operation portion, and is configured to radiate the heat from the light source transmitted to the heat transmission frame to the outside of the operation portion wherein the heat transmission frame is intermediated in a heat transmission path of the heat generated by the light source, between the light source and the external heat radiation part, said heat transmission frame has good thermal conductivity, is configured to transmit the heat generated by the light source and is electrically insulative and configured to shut out electric flow from the external heat radiation part to the light source when electric energy is input to the external heat radiation part, said heat transmission frame is completely disposed into the first outer casing of the operation portion and constructed and located to prevent static electric charge from reaching the light source, and a further frame disposed on the heat transmission frame and having good thermal conductivity and configured to transmit the heat generated by the light source.