光碟吸入機構之分析與研究

Abstract

隨著電子資訊的日漸增加，光碟機的使用也逐漸普遍，目前在市面上可見的吸入式光碟機，其設計重點在於有限的空間中吸入與定位碟片。本研究應用機構學理於吸入式光碟機的分析之中，針對現有機型進行自由度、傳力角及機械利益等的學理分析，並建立電腦虛擬動態模型來提高分析時的效率。本研究亦提出比一般光碟機的架構更為簡單的新型自動對心機構，並對此進行構造合成，以找出其中最合適的機構。接著再針對此機構進行運動與動力分析，推導機構桿件的位移與動力學方程式，以計算桿件所需的尺寸與推入碟片時所需的推力，再根據市售機構之模擬與實測的結果，計算現有機構的最大碟片推入力量，並在滑塊不會因為摩擦而卡住的條件下，決定機構扭力彈簧的剛性係數設定範圍，可供未來在設計光碟機時的參考依據。

Optical disk drives have become popular owing to the increase of electronic information in recent years. Various types of slot-in optical drives are available in the market. These designs focus themselves on the disk pull-in and positioning functions. Using theories of mechanisms, this research attempts to analyze current slot-in optical drives by investigating their degrees of freedom, transmission angles, and mechanical advantage. The model of virtual prototyping is also established to enhance analysis efficiency. A new auto-centering mechanism which is simpler in structure is constructed. By structural synthesis, the most appropriate mechanism are found and analyzed by kinematic and dynamic equations of motion. Lengths of links and the force required to push the disk are calculated,and validated by experiments. The stiffness of torsional spring used in the new mechanism is determined under conditions that the maximum push force do not exceed current drives and the sliders will not be jammed by friction. This information can be used to design slot-in optical drives in the future.