| 摘要 |
<p>The structure has upper and lower plates, and upper and lower heaters for heating the plates, respectively. A hinge is arranged between the plates, and comprises a shaft member (112) and a base shaft (21). The base shaft has a triangular base shaft hole with a triangular shaft. The shaft member passes through the hole, and movable between three angles for switching the position of the plates based on usage condition. The shaft member is fixedly connected to the upper plate, and the base shaft is rigidly connected to the lower plate, where the base shaft has a triangular body.</p> |
