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    • 2. 发明授权
    • Guide drum apparatus for a video tape recorder and/or player
    • 用于录像机和/或播放器的导向鼓装置
    • US4030133A
    • 1977-06-14
    • US611601
    • 1975-09-09
    • Kiichiro YamadaIsao KozuTakenori AkamineRyota Shimizu
    • Kiichiro YamadaIsao KozuTakenori AkamineRyota Shimizu
    • G11B5/52G11B15/61G11B21/18
    • G11B15/61
    • A guide drum apparatus for a video tape recorder and/or player has: a main shaft secured on a chassis, a first guide drum rotatably mounted on the main shaft and having a plurality of magnetic video heads, driving means for rotating the first guide drum at a rotational speed greater than the speed of movement of a tape, and a second guide drum mounted on the main shaft coaxially with the first guide drum and rotatable independently therefrom. The first and second guide drums have tape guiding portions, respectively, which are opposed to each other and have peripheral tape guide surfaces to guide the magnetic tape. Adjusting means is mounted on the main shaft so as to adjust the height of the video heads with respect to the tape guiding portion of the second guide drum. With this guide drum apparatus, the height of the video heads can be adjusted precisely and easily to trace the video track on the tape even while the video heads are rotating at a high speed.
    • 一种用于录像机和/或播放器的导向鼓装置具有:固定在底盘上的主轴,可旋转地安装在主轴上并具有多个磁性视频磁头的第一导向鼓,用于使第一导向鼓 以大于带的移动速度的旋转速度和与第一导向滚筒同轴地安装在主轴上并与其独立旋转的第二引导鼓。 第一和第二导向鼓分别具有彼此相对的带引导部分,并具有用于引导磁带的外围带引导表面。 调节装置安装在主轴上,以便调节视频头相对于第二导向鼓的带引导部分的高度。 使用该导向鼓装置,即使在视频头高速旋转的情况下,可以精确且容易地调整视频头的高度来跟踪磁带上的视频轨道。
    • 3. 发明授权
    • Magnetic tape recording and/or reproducing apparatus
    • 磁带记录和/或再现装置
    • US4152738A
    • 1979-05-01
    • US823174
    • 1977-08-08
    • Ryota ShimizuIsao KozuTakenori Akamine
    • Ryota ShimizuIsao KozuTakenori Akamine
    • G11B15/29G11B15/665G11B15/675G11B15/66G11B15/18
    • G11B15/6651G11B15/67586
    • A magnetic tape recording and/or reproducing apparatus has a cam driven mechanism for moving a pressure roller from a first position within a cutout recess of a tape cassette and behind the inner side of a magnetic tape to a second position slightly spaced from a tape drive capstan. According to said movement of the pressure roller, a tape drawing pin is moved from an inoperative position within the cutout recess and behind the inner side of the magnetic tape to an operative position where the tape is drawn out of the cassette and brought into a desired tape path so as to be engaged with a magnetic head which is stationarily mounted on a base plate of the apparatus. The pressure roller is further moved to a third position in which it is pressed against the tape drive capstan by a solenoid mechanism upon energization thereof so as to move the tape.
    • 磁带记录和/或再现装置具有凸轮驱动机构,用于将压力辊从带盒的切口凹部内的第一位置移动到磁带的内侧后方至与带驱动器稍微间隔开的第二位置 绞盘。 根据压力辊的移动,带状拉丝销从切口凹槽内的不工作位置移动到磁带内侧的后方,移动到工作位置,在该位置,胶带从盒中拉出并使其成为期望的 磁带路径以便与固定地安装在设备的基板上的磁头接合。 压力辊进一步移动到第三位置,在第三位置,当通过螺线管机构通电时,压力辊被压靠在带驱动绞盘上,以便移动带子。