| 摘要 |
PURPOSE:To enable accurate paper feed by suppressing the shift of a leaf spring, by arranging the part of the leaf spring extending to a protruded part so as to cross the hole part of a fixed member almost at right angles and minimizing the gap between the width of the hole part of the leaf spring and the thickness of the protruded part of the fixed member. CONSTITUTION:One end of a leaf spring 2 in the side of a protruded part 10 is bent between a groove 8 and a hole part 7 so as not only to become almost vertical to the protruded part 10 but also to cross the same almost at right angles to form a bent part 17 and the difference between the width (a) of the hole part 7 of the leaf spring 2 and the thickness (b) of the protruded part 10 of a fixed member 15 is sufficiently made small. By this structure, the shift of the leaf spring 2 to before and behind directions shown by arrows 11, 12 is extremely reduced at the time of the pressure contact and detachment of a pressure roller 4 with respect to a platen 1 with the rotation of a friction shaft 5 and more accurate paper feed is enabled. As mentioned above, by bending one end of the leaf spring in the side of a paper guide so as to make the same vertical to the protruded part of the fixed member of the rear part of the paper guide, the difference between the width of the hole part of the leaf spring and the thickness of the protruded part of the fixed member can be made sufficiently small and the before-and-behind shift of the leaf spring is minimized and the shift of the close contact position of the pressure roller to the platen is eliminated to enable more accurate paper feed. |
