Patent ID: 8303487

Claim:
A power driven bending endoscope device with detachable insertion portion comprising: an insertion body including a thin and long flexible tube portion which is allowed to be inserted into a subject, a bending portion which is provided on a distal end side of the flexible tube portion and allowed to be bent, a distal rigid portion containing an image pickup device on a distal end side of the bending portion, and an insertion engagement portion; and a detachable bending operation unit from/with which the insertion engagement portion of the insertion body is separated/coupled via attachment/detachment units, the detachable bending operation unit containing a bending drive unit for bending the bending portion by pulling and loosening an angle wire provided in the insertion body, wherein the insertion engagement portion of the insertion body includes a pulling unit which pulls and loosens the angle wire for bending the bending portion and a bending state detection unit for detecting a bending angle indicating a bending state of the bending portion based on a rotating amount of the pulling unit, and the insertion engagement portion further includes an output unit for outputting a detection result of the bending state detection unit as an electric signal and a first power transmission portion for transmitting a power of the bending drive unit to the pulling unit in an attachment/detachment unit to/from the bending operation unit, the first power transmission portion constituting a detachable engagement unit, and wherein the bending operation unit includes an input unit which is electrically connected to the output unit and to which the electric signal outputted from the output unit is inputted in a coupled state and a second driving power transmitting portion for transmitting the power of the bending drive unit to the pulling unit via the first driving power transmission portion in the coupled state in an attachment/detachment unit to/from the insertion body the second driving power transmitting portion constituting the engagement unit, and the bending operation unit further includes therein a control unit which starts a rotation control of the bending drive unit based on the electric signal which is indicative of the bending angle of the bending portion when the bending operation unit and the insertion body are brought into the coupled state from a state where the bending operation unit and the insertion body are separated from each other the electric signal being inputted through the input unit, and which performs the rotation control of the bending drive unit based on the electric signal inputted via the input unit while the bending operation unit is coupled with the insertion body.