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    • 6. 发明授权
    • Magnetic recording reproduction apparatus with improved adjustment
characteristics for audio-control head
    • 具有改善音频控制头调节特性的磁记录再现设备
    • US5703737A
    • 1997-12-30
    • US558181
    • 1995-11-15
    • Noboru KatohnoYoshihisa TsurumiChikara Iwama
    • Noboru KatohnoYoshihisa TsurumiChikara Iwama
    • G11B5/49G11B5/56G11B21/14
    • G11B5/56
    • In a magnetic recording and reproduction apparatus, for simplifying the structure of a fixing device of an audio-control head and for decreasing the number of adjustment procedures, a synthetic resin part formed of a plate member is molded of a resin integrally with a shaft part extending in a through hole in a base and with a fixed part provided on the opposite surface of the base to the surface of the base on which the plate member is provided, so that the synthetic resin part can be rotated around the through hole; an audio-control head is provided on a head plate, which is pressed toward the base by a spring fitted on a spring fixing screw; and three adjustment screws include screw parts which support the head plate, and cylindrical parts which abut against the surface of the base through holes bored through the synthetic resin part. Positioning of the audio-control head in a moving direction of a magnetic tape is effected by an adjustment jig between a notch on the synthetic resin part and a projection part on the base. Two of the adjustment screws are located on a straight line passing the center of the through hole in the base and the center of a control head, which positions are on the front and rear sides of the control head. Mainly, the height of the audio-control head is adjusted by one of the adjustment screws, the inclination angle .theta. is adjusted by another adjustment screw, and the azimuth angle is adjusted by the other one.
    • 在磁记录和再现装置中,为了简化音频控制头的定影装置的结构并减少调节步骤的次数,由板构件形成的合成树脂部分由树脂一体地与轴部分 在基部的通孔中延伸,并且在基部的相对表面上设置有固定部分到设置有板构件的基部的表面,使得合成树脂部分能够围绕通孔旋转; 在头板上设有音频控制头,弹簧固定螺钉上装有弹簧将其压向基座; 三个调节螺钉包括支撑头板的螺钉部件和与通过合成树脂部件钻孔的基部通孔的表面抵接的圆柱形部件。 音频控制头在磁带的移动方向上的定位是通过合成树脂部分上的凹口和基座上的突起部之间的调节夹具实现的。 两个调节螺钉位于通过基座中的通孔的中心和控制头的中心的直线上,该位置位于控制头的前后两侧。 主要是通过其中一个调节螺丝来调整音频控制头的高度,通过另一个调节螺丝来调节倾斜角度θ,另一个调节方位角。
    • 10. 发明授权
    • Tape guide structure of rotary head drum in recording/reproduction
apparatus and method of machining the same
    • 记录/再现装置中旋转磁头鼓的磁带引导结构及其加工方法
    • US5734537A
    • 1998-03-31
    • US652271
    • 1996-05-23
    • Seiji OnoKenmei MasudaHidekazu TakedaAtsushi InoueNobuo MasuokaNoboru KatohnoMakoto IbeKuniaki HirayamaKiyokazu Watanabe
    • Seiji OnoKenmei MasudaHidekazu TakedaAtsushi InoueNobuo MasuokaNoboru KatohnoMakoto IbeKuniaki HirayamaKiyokazu Watanabe
    • G11B15/61
    • G11B15/61
    • In a rotary head drum of a recording/reproduction apparatus, for smoothly holding a magnetic tape over a guide step provided on a lower drum to guide the magnetic tape, part of a chamfer formed in the guide step is formed as a large chamfer in which a chamfered amount is larger than that of the remaining part of the chamfer. With the provision of the large chamfer, even if the lower edge of the magnetic tape deviates from the guide step when the tape is wound over or unwound from the drum, damages of the magnetic tape can be prevented. Therefore, the position and attitude control of tape withdrawing members can be greatly simplified and the magnetic tape can always run stably while being restricted in its position by the guide step. In the process of machining a tape running surface on the drum, by increasing the feed distance of a blade in the part of the chamfer where the large chamfer is to be formed by chamfering the guide step with a large chamfered amount, in comparison with the feed distance set in the remaining part of the chamfer, the large chamfer and the small chamfer can be both machined at the same time, resulting in simplified machining steps.
    • 在记录/再现装置的旋转磁头鼓中,为了平滑地将磁带保持在设置在下磁鼓上的引导台上以引导磁带,形成在引导步骤中的倒角的一部分形成为大倒角,其中 倒角量大于倒角剩余部分的倒角量。 通过设置大倒角,即使当磁带从磁鼓卷绕或退绕时磁带的下边缘偏离引导步骤,也可以防止磁带的损坏。 因此,能够极大地简化卷取装置的位置和姿势控制,并且通过引导步骤限制在其位置,磁带总是可以稳定地运行。 在加工滚筒上的带子运行表面的过程中,通过在倒角部分中增加叶片的进给距离,通过以较大的倒角量倒角引导台阶,形成大倒角的部分,与 在倒角的剩余部分设置的进给距离,大倒角和小倒角可以同时加工,从而简化了加工步骤。