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    • 4. 发明授权
    • Spindle device for an automatic record changer
    • 用于自动记录更改的主轴装置
    • US3712630A
    • 1973-01-23
    • US3712630D
    • 1970-07-23
    • VICTOR COMPANY OF JAPAN
    • TAJIME K
    • G11B17/14G11B17/16G11B17/04
    • G11B17/16G11B17/14
    • A spindle device for an automatic record changer comprising a shaft mounted in the axial bore of a spindle for elevational motion therein, and a cam attached to the shaft for elevational motion with the shaft, said cam having a constricted portion in the central portion, a major cam surface in the lower portion and a minor cam surface in the upper portion, hooks and record holders provided to move into and out of the spindle in a direction normal to the axis of the shaft as the cam and shaft move vertically up and down. When the cam and shaft are moved upwardly prior to their downward movement for changing records, shoulders formed near the forward end of each of the record holders are brought into abutting engagement with the edges of the center openings of records held by the hooks, the amount of movements of the holders and the amount of upward movements of the cam and shaft are restricted and the presence or absence of a record held by the hooks can be detected based on the amount of upward movements of the cam and shaft.
    • 一种用于自动记录转换器的主轴装置,包括安装在主轴的轴向孔中的轴,用于在其中进行高程运动;以及凸轮,其附接到所述轴,用于与所述轴进行垂直运动,所述凸轮在所述中心部分具有收缩部分, 下部的主凸轮表面和上部的小凸轮表面,当凸轮和轴垂直上下移动时,钩和记录保持器沿垂直于轴的轴线的方向移动进入和离开主轴; 。 当凸轮和轴在其向下移动之前向上移动以改变记录时,形成在每个记录保持器的前端附近的肩部与由钩保持的记录的中心开口的边缘抵接, 保持器的运动和凸轮和轴的向上运动量受到限制,并且可以基于凸轮和轴的向上运动的量来检测由钩保持的记录的存在或不存在。