Goldstar, Co., Ltd.

Weon K Lee

Soo K Kim

Mun C Joung

Seung Il Kim

Hyun Kyu Park

Joong K Joh

Ho Won Lee

Yoon S Seoh

Kwan B Sim

A variable bulge device for displacing bulges of a rotation head drum, capable of adjusting a protruded amount of a bulge used, depending on a rotation speed of the rotating head drum and the kind of a tape used. The device includes an operating member partially protruded at one end thereof through a bulge hole formed at a lower drum of the rotation head drum, the operating member having a variable bulge provided by the protruded end, and a drive unit for driving the operating member and thereby adjusting the protruded amount and position of the variable bulge. For adjusting a protruded amount of a bulge used, depending on a rotation speed of the rotating head drum and the kind of a tape used, the device includes a hollow elastic rubber film partially protruded at an upper end thereof through a bulge hole formed at a lower drum of the rotation head drum, the elastic rubber film having a variable bulge provided by the protruded end, an operating fluid contained in the elastic rubber film, an operating fluid expanding unit adapted to expand the operating fluid and thereby adjust the protruded amount of the variable bulge.

Variable bulge device for rotatable head drum

A reel driving clutch for transmitting power to a reel of a magnetic recording/playback system such as a VCR and a DAT. The clutch comprises a shaft fixed to a base plate of the system, a disk rotatably mounted on the shaft to which power from an idler is transmitted, a reel body rotatably mounted on the shaft and placed on the disk, and viscous fluid contained between the disk and the reel body, thereby causing torque of the disk to be transmitted to the reel body via the viscous fluid. The clutch causes a take up reel to be lightened and miniaturized and improves tape running stability.

Reel driving clutch of magnetic recording/playback system

Growing community of inventors

Seoul, South Korea

Weon K Lee