Patent ID: 7922406

Claim:
An image generating apparatus comprising: a print head for printing images while pressing a platen roller with prescribed pressing force; a driving gear portion including a first toothed portion provided in a prescribed rotation angle range and a first toothless portion provided on a region other than said first toothed portion; and a print head rotating member integrally including a driven gear portion having a second toothed portion provided in said prescribed rotation angle range and a second toothless portion provided on a region other than said second toothed portion for meshing with said driving gear portion and a pressing portion pressing said print head, wherein said driving gear portion is so formed that the diameter of the outer peripheral surface of said first toothless portion is smaller than the tip diameter of said first toothed portion, and said driving gear portion is so arranged that said first toothless portion of said driving gear portion slides on said second toothed portion of said driven gear portion of said print head rotating member in the vicinity of a position where said print head presses said platen roller with said pressing portion of said print head rotating member.