Patent ID: 7645245

Claim:
An endoscopic lithotripsy apparatus comprising: an elongated probe which includes a distal end and a proximal end, the distal end being operable to be inserted into a body cavity; an ultrasonic vibration source detachably attached to the proximal end of the probe to transmit an ultrasonic vibration to the probe in a state in which the proximal end of the probe is connected to the ultrasonic vibration source; a mechanical shock generation source which is disposed on a side of the proximal end of the probe and which applies a force to the ultrasonic vibration source, in a state in which the ultrasonic vibration source is detached from the proximal end of the probe and which allows the ultrasonic vibration source to collide with the proximal end of the probe to apply a mechanical shock to the probe; and a switch mechanism to switch a state in which the ultrasonic vibration from the ultrasonic vibration source is transmitted to the proximal end of the probe and a state in which the mechanical shock from the mechanical shock generation source is transmitted, the switch mechanism including a cylindrical case in which the mechanical shock generation source is disposed in a cylindrical shape and in which the ultrasonic vibration source is disposed inside the mechanical shock generation source and which movably supports the ultrasonic vibration source with respect to the mechanical shock generation source and which includes a screw portion on the outer peripheral surface of the distal end; a coupling member which is supported by the inner peripheral surface of the distal end of the case and which is connected to the proximal end of the probe; and a cover member which includes a screw portion screwed onto the screw portion of the distal end of the case and which abuts on the coupling member and which is rotated by the distal end of the case so as to attach/detach the coupling member with respect to the ultrasonic vibration source.