Patent ID: 8206289

Claim:
An adapter type endoscope comprising: an observation optical system; a light emitting device; an adapter side electrical connection portion configured by including: a plurality of conductive case bodies; a plurality of first pin members which are respectively fixed to the plurality of case bodies and respectively electrically connected to a connection substrate electrically connected to the light emitting device; second pin members slidably arranged in the case bodies; urging members which are respectively arranged in the case bodies and are brought into contact with the first pin members and the second pin members in the arrangement state to urge the second pin members in an axis direction, and an adapter side insulating portion which has a positioning surface and integrally covers a plurality of electrical connection members, each configured by arranging the first pin member, the second pin member, and the urging member in the case body, in parallel with each other at a predetermined interval and in an insulating state; a distal end adapter including an adapter main body in which there are formed an adapter side connection portion arrangement hole in which the adapter side electrical connection portion is arranged and which has a positioning portion, an optical hole in which the observation optical system is arranged, and a positioning hole; an objective optical system; an endoscope side electrical connection portion which are arranged in the endoscope side connection portion arrangement hole, the endoscope side electrical connection portion being configured by including: a plurality of terminal members, each of which has a disk-shaped contact surface portion and a thin and long rod portion having a diameter smaller than an outer diameter of the contact surface portion, the plurality of terminal members being electrically connected to the power supply portion for supplying electric power to the light emitting device, and being brought into contact with the second pin members of the distal end adapter; and an endoscope side insulating portion for making the plurality of terminal members align in parallel with each other at a predetermined interval to be insulated from each other, the endoscope side insulating portion including an elliptic contact surface portion arrangement portion on which the plurality of terminal members are arranged and on which a proximal end surface of the contact surface portion is arranged, and a covering portion the diameter of which is smaller than the diameter of the contact surface portion arrangement portion, and which covers the intermediate portion of the rod portion and is inserted in the endoscope side connection portion arrangement hole; and an insertion portion distal end portion to which the distal end adapter is detachably attached, and which has the endoscope side connection portion arrangement hole in which the endoscope side electrical connection portion is arranged and has a rotation stopping portion to be arranged in the positioning hole of the distal end adapter.