Patent ID: 8221305
Filing Date: 2012-07-17
Classification: A61B

Abstract:
1. An endoscope system comprising: a flexible treatment tool insertion portion; an operating unit; a channel through which the treatment tool insertion portion can be inserted; and an insertion/extraction device configured to insert the treatment tool insertion portion into the channel and extract the treatment tool insertion portion from within the channel, a treatment tool distal end portion that is positioned at a distal end of the treatment tool insertion portion, and configured to perform treatment after receiving forwards or backwards driving force, an operating device configured to supply the forwards or backwards driving force to the treatment tool distal end portion, wherein the insertion/extraction and the operating device are provided with: drive shafts that are driven by a pivot drive source to pivot; rollers that have rotation center shafts, and that are configured to receive pivot driving force from the drive shafts, and are thereby able to pivot around the rotation center shafts; and a first power transmitting device that is positioned adjacent a distal end side of the operating unit, and configured to transmit pivot driving force from the drive shafts to the rollers, a second power transmitting device that is positioned adjacent a proximal end side of the operating unit, and configured to transmit pivot driving force from the drive shafts to the rollers, a position of the rotation center shafts being such that, in case of the rollers contact with the treatment tool insertion portion, it is different from a position of the rotation center shafts, in case of the rollers not being in contact with the treatment tool insertion portion, the rotation center shafts being configured such that they can be made to revolve around the drive shafts by rotation driving force from the drive shafts, a revolution radius being defined by a distance between the rotation center shafts and the drive shafts, with a first distance, which is obtained by adding a radius of the rollers to the revolution radius, is a longer distance than a second distance between the drive shafts and the treatment tool insertion portion, the first and second power transmitting devices being configured to cause the rotation center shafts to revolve around the drive shafts, and to cause the rollers to rotate around the pivot center shafts, the insertion/extraction device being configured to operate the first and second power transmitting devices so as to move the treatment tool insertion portion forwards or backwards, and the operating device being configured to operate the second power transmitting device so as to perform treatment with the treatment tool distal end portion.