| 摘要 |
Thermal printing mechanism according to the invention comprises: a printer chassis (1), a thermal printhead (2), a motor (3) for rotating a platen roller (4) with a motor spur gear (5), a platen roller (4) with a platen roller gear (6) mounted on it, said platen roller gear being a worm wheel able to engage with a worm screw. The motor (3) is mounted so as its gear axis is substantially parallel to the thermal printhead surface which is in contact with the platen roller (4), and perpendicular to the platen roller shaft (9). The thermal printing mechanism further comprises a gear shaft (10) mounted substantially parallel to the motor gear axis, said gear shaft (10) having at one end a spur gear (11) able to engage with the motor spur gear (5), and at the other end a worm screw (7), able to engage with the platen roller gear (6). |
