公开(公告)号：US5833162A

公开(公告)日：1998-11-10

申请号：US886230

申请日：1997-07-01

Applicant: Ho-Jin Jang

Inventor： Ho-Jin Jang

IPC: G11B15/32

CPC classification number: G11B15/32

Abstract: A video cassette recorder incorporates therein a reel table driving device. The reel table driving device comprises a pulley attached to a shaft rotatably held in the deck and a driving gear slidably mounted to the shaft. The driving gear is provided with a first and a second gear portions, the first gear portion having a smaller diameter than the second gear portion. A pair of idlers is rotatably held in a support plate. Each of the idlers includes a first gear and a second gear, the first gear having a larger diameter than the second gear. A compressive spring is disposed between a bottom plate and the pulley, biasing the driving gear upwardly so that the first gear portion of the driving gear is engaged with the first gears of the idlers. An urging member is pivotably mounted at one end to the deck and the other end is situated on a bottom plate of the driving gear. A movable lever with a protuberance is disposed above the urging member and is moved in the lengthwise direction depending on the operation mode of the VCR. The protuberance of the movable lever selectively presses the urging portion and the driving gear down so that the second gear portion is engaged with the second gears of the idlers.

Abstract translation: 盒式磁带录像机包括一个卷盘驱动装置。 卷轴台驱动装置包括安装在可旋转地保持在甲板中的轴的滑轮和可滑动地安装在轴上的驱动齿轮。 驱动齿轮具有第一和第二齿轮部分，第一齿轮部分具有比第二齿轮部分更小的直径。 一对惰轮被可旋转地保持在支撑板中。 每个惰轮包括第一齿轮和第二齿轮，第一齿轮具有比第二齿轮更大的直径。 压缩弹簧设置在底板和皮带轮之间，向上偏压驱动齿轮，使得驱动齿轮的第一齿轮部分与惰轮的第一档啮合。 推动构件一端可枢转地安装在甲板上，另一端位于驱动齿轮的底板上。 具有突起的可移动杆设置在推动构件的上方，并且根据VCR的操作模式沿长度方向移动。 可动杆的突起选择性地将推动部分和驱动齿轮向下压，使得第二齿轮部分与惰轮的第二齿轮接合。