公开(公告)号：US5924182A

公开(公告)日：1999-07-20

申请号：US976569

申请日：1997-11-24

申请人： Dae-Sun Yoo

发明人： Dae-Sun Yoo

IPC分类号： G11B5/52 ,  B23D5/02 ,  G11B5/53 ,  B23P19/02 ,  B23D37/16

CPC分类号： G11B5/53 ,  B23D5/02 ,  Y10T29/5191 ,  Y10T29/53826 ,  Y10T409/402975 ,  Y10T409/503116

摘要： A head drum assembly for use in a video cassette recorder includes a stationary drum, a rotary shaft rotatably fitted into the stationary drum, a rotary drum closely fitted onto the rotary shaft, a lower bearing fitted into a lower portion of the stationary drum and an upper bearing fitted into an upper portion of the stationary drum. Herein, the upper bearing includes a top surface facing the rotary drum and an inner peripheral surface, facing the rotary shaft. The top surface is provided with a plurality of building-up grooves for retaining an oil for lubricating the upper bearing and the inner peripheral surface is provided with an oil guiding groove for guiding the oil retained on the inner peripheral surface onto the building-up groove of the top surface during rotation of the rotary shaft.

摘要翻译： 用于盒式录像机的磁头鼓组件包括固定磁鼓，可旋转地装配到固定磁鼓中的旋转轴，紧密地装配在旋转轴上的旋转磁鼓，装配到固定磁鼓的下部的下轴承和 上轴承装配到固定滚筒的上部。 这里，上轴承包括面向旋转鼓的顶表面和面向旋转轴的内周表面。 顶表面设有多个用于保持用于润滑上轴承的油的建立凹槽，并且内周表面设置有导油槽，用于将保持在内周面上的油引导到积层槽 在旋转轴的旋转期间的顶表面。

公开(公告)号：US6034844A

公开(公告)日：2000-03-07

申请号：US936884

申请日：1997-09-25

申请人： Dae-Sun Yoo

发明人： Dae-Sun Yoo

IPC分类号： G11B5/52 ,  F16C33/10 ,  G11B5/53 ,  G11B21/04 ,  G11B25/06 ,  G11B5/008

CPC分类号： F16C33/106 ,  F16C33/103 ,  G11B21/04 ,  G11B25/063 ,  G11B5/53

摘要： A head drum assembly for use in a video cassette recorder includes a stationary drum, a supporting shaft fixedly fitted into the stationary drum, a rotary drum mounted around an upper portion of the supporting shaft, an upper and a lower bearing for rotatable supporting the rotary drum. The stationary drum is provided with a bearing cavity having a sliding surface formed at a predetermined angle of inclination to a main frame of the video cassette recorder. In particular, the lower bearing mounted to rotate together with the rotary drum is lubricated by an oil lubricant retained in the bearing cavity, and includes pumping vanes for pumping the oil lubricant in such a way that the oil lubricant is uniformly distributed between the sliding surface and one surface of the lower bearing being in contact with the sliding surface.

摘要翻译： 用于盒式录像机的磁头鼓组件包括固定磁鼓，固定地装入固定磁鼓的支撑轴，安装在支撑轴上部的旋转磁鼓，可旋转地支撑转动的上轴承和下轴承 鼓。 固定滚筒设置有轴承腔，该轴承腔具有以预定的倾斜角度形成在盒式磁带录像机的主框架上的滑动面。 特别地，安装成与旋转鼓一起旋转的下轴承由保持在轴承腔中的油润滑剂润滑，并且包括用于泵送油润滑剂的泵叶片，使得油润滑剂均匀地分布在滑动表面 下轴承的一个表面与滑动面接触。

公开(公告)号：US5665900A

公开(公告)日：1997-09-09

申请号：US639414

申请日：1996-04-29

申请人： Dae-Sun Yoo

发明人： Dae-Sun Yoo

IPC分类号： G01N3/56 ,  G11B15/29 ,  G11B33/10

CPC分类号： G11B33/10 ,  G01N3/56 ,  G11B15/29

摘要： An apparatus for testing wear-resistance of a pinch roller comprises a base provided with at least one post; a drum rotatably mounted on the base, wherein a tape is wound around an circumferential surface thereof; a driving motor; a tape holding member and a blind hole which is formed on the drum, the tape holding member being tightly inserted into the blind hole while the tape is tightened to hold the tape tightened; and a pinch roller holder pivotally mounted on the base, wherein a pinch roller to be tested is rotatably mounted on one end portion thereof and the other end portion is selectively connected to the post through an elastic member, thereby allow the pinch roller to resiliently press the tape against the drum.

摘要翻译： 用于测试夹送辊的耐磨性的装置包括：设置有至少一个柱的基座; 一个可旋转地安装在基座上的滚筒，其中一条带卷绕在其圆周表面上; 驱动电机; 带状保持构件和形成在滚筒上的盲孔，带固定构件紧固在盲孔中，同时带子被紧固以保持带子紧固; 以及可枢转地安装在基座上的夹送辊保持架，其中待测试的夹送辊可旋转地安装在其一个端部上，另一端部通过弹性构件选择性地连接到柱上，从而允许夹送辊弹性地按压 磁带对着鼓。