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    • 2. 发明授权
    • Method of producing a tape guide device of a rotary head type video tape
recorder and the product thereof
    • 旋转磁头型磁带录像机的导带装置的制造方法及其制造方法
    • US4459627A
    • 1984-07-10
    • US379365
    • 1982-05-18
    • Haruhiko KitagawaHiroyuki ItoTakashi IchiyanagiKiyokazu Imanishi
    • Haruhiko KitagawaHiroyuki ItoTakashi IchiyanagiKiyokazu Imanishi
    • B23Q11/00G11B15/61G11B15/60G11B5/08
    • B23Q11/0032G11B15/61
    • A tape guide device of a rotary head type video tape recorder of the helical scanning system including a shoulder portion formed on an outer circumferential surface of a lower stationary cylindrical portion cooperating with an upper rotary cylindrical portion and constituting a head cylindrical drum for guiding a magnetic tape. The shoulder portion has, in a section thereof with which the magnetic tape is not brought into contact, a configuration consisting of a plurality of parabolic lines connected to one another. Alternatively, the offset portion may have a configuration consisting of curves which are such that their second differential coordinates are continuous over the entire circumference of the head cylindrical drum with respect to the fixed coordinate system disposed on the outer circumferential surface of the head cylindrical drum, or the shoulder portion may have a configuration consisting of curves which are such that the absolute value of the maximum value of the second differential coefficients is not equal to the absolute value of the minimum value thereof.
    • 螺旋扫描系统的旋转磁头型录像机的磁带引导装置,包括形成在与上部旋转圆筒部分配合的下部固定圆筒部分的外圆周表面上的肩部,并构成用于引导磁性的头部圆柱形滚筒 胶带。 肩部在其不与磁带接触的部分具有由彼此连接的多个抛物线组成的构造。 或者,偏移部分可以具有由相对于设置在头部圆柱形鼓的外圆周表面上的固定坐标系的头圆柱形鼓的整个圆周上连续的曲线组成的曲线, 或者肩部可以具有由曲线构成的配置,使得第二差分系数的最大值的绝对值不等于其最小值的绝对值。