| 摘要 |
A roller mechanism for a lottery ticket machine includes a face plate, a compartment, a roller unit, two position hook bars, a gear unit, and a motor device. The roller unit has a main and a subordinate rollers both provided with a pattern. The motor has a worm to rotate the gear unit and then the rollers. The position hook bars press elastically the subordinate roller to engage the main roller. The main roller rotates the subordinate roller in the reverse direction, rolling out a lottery ticket out from the two rollers. But when a lottery ticket is pulled by external force, the patterns of the rollers clamp the upper and the lower surface of the lottery ticket and increase friction, and the subordinate roller shrinks inward the position hook bars to engage tightly the main roller to prevent the lottery ticket from being pulled out.
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