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为了克服抵挡普及型机构式全自动电唱机存在的缺点,通常在电子式全自动电唱机的结构上具有机电一体化的特点,即用微型计算机控制专用音臂驱动马达和终端检测部件。一、检测部件终端检测部件采用了光电晶体管和发光二极管(LED)的光学方法。对非接触式光学法而言,它的优点是音臂动作灵敏度不受干扰,结构较为简单、工作稳定。图1为与音臂旋转中心连接的检测部分。图中,1为光电晶体管基板,2为终端传感器(A)、(B),3为落下他置检测用传感器;4为拾音板;5为衬垫;6为LED基板,7为
In order to overcome the shortcomings of the pop-up type fully automatic jukebox, the structure of the fully automatic jukebox is generally characterized by mechatronics, that is, the microcomputer is used to control the special boom drive motor and the terminal detection part. First, the detection components Terminal detection components using the phototransistor and light-emitting diode (LED) optical method. The non-contact optical method, its advantage is that the sensitivity of the arm movement without interference, the structure is relatively simple, stable work. Figure 1 is connected to the sound arm rotation center detection section. In the figure, reference numeral 1 denotes a phototransistor substrate, reference numeral 2 denotes a terminal sensor (A), (B), and reference numeral 3 denotes a sensor for detecting the drop, 4 is a pickup board, 5 is a spacer, 6 is an LED substrate,