Patent ID: 8475069
Filing Date: 2013-07-02
Classification: B41J,B65H

Abstract:
1. A printer unit comprising: an accommodating portion which accommodates printing object mediums such that they are stacked; a printing means for printing the printing object medium based on a desired print data; a supply roller supported rotatably in contact with the printing object mediums accommodated in the accommodating portion; and supply means having a supply drive means for rotating the supply roller for supplying the printing object medium to the printing means, wherein the supply roller includes at least: (D) a rotation restricting member which is mounted on the sliding restricting portion of the mounting shaft member slidably in a shaft direction of the mounting shaft member so as to restrict a rotation of the roller member with respect to the mounting shaft member, the rotation restricting member having a sliding portion with a second flat face corresponding to the first flat face of the sliding restricting portion of the mounting shaft member, the sliding portion having a first end face and second end face; and (E) an elastic member which is disposed between the rotation restricting member mounted on the sliding restriction portion of the mounting shaft member and the holding portion formed on the mounting shaft member in such a manner that the mounting shaft member is inserted in the elastic member so as to bias the mounting shaft in a direction of elongating the supply roller, wherein the rotation restricting member has a restricting convex portion which corresponds to the shape of the cutout portion and is to be fitted to the cutout portion, and wherein the mounting shaft member is rotated together with the roller member by the rotation restricting member, wherein the rotation restricting member is mounted on the sliding restricting portion of the mounting shaft member so that the first flat face of the sliding restricting portion in the mounting shaft member and the second flat face of the sliding portion in the rotation restricting member slidably contact with each other, and wherein when the mounting shaft member is discharged from the sliding hole of the roller member, the first end face of the sliding portion in the rotation restricting member contacts with the first restricting end of the sliding restricting portion in the mounting shaft member by elastic force of the elastic member disposed between the holding portion of the mounting shaft member and the second end face of the sliding portion in the rotation restricting member.