Ground device of head drum apparatus

A head drum apparatus, comprising:

• a stationary shaft;
• an upper drum rotatably coupled to the stationary shaft via at least one bearing;
• a boss fixed to a top portion of the stationary shaft;
• a motor mounted in a top portion of the apparatus;
• and
• a ground device mounted in said top portion of the apparatus;
• wherein said ground device comprises an anchor member anchored to an upper surface of the boss, an elastic member fixed to a bottom surface of the anchor member and extending downwardly through a bore in the boss, and a ground member fixed to a lower end of the elastic member, the ground member being in elastic contact with an outer race of said at least one bearing;
• and
• wherein the elastic member comprises a compressed coil spring, and the anchor member has an embossed portion formed therein, said embossed portion extending downward from the bottom surface of said anchor member so as to extend into and be received by an interior portion of said compressed coil spring.

A ground device for a head drum apparatus which includes a stationary shaft, an upper drum rotatably coupled to the stationary shaft via at least one bearing, a boss fixed to a top portion of the stationary shaft, and a motor mounted in a top portion of the apparatus;

• wherein said ground device comprises:
• an anchor member anchored to an upper surface of the boss;
• an elastic member fixed to a bottom surface of the anchor member and extending downwardly through a bore in the boss;
• and
• a ground member fixed to a lower end of the elastic member, the ground member being in elastic contact with an outer race of said at least one bearing;
• wherein the anchor member has a hole into which the stationary shaft is fitted, whereby the anchor member is prevented from moving into a position wherein the anchor member is anchored to the boss.

A ground device for a head drum apparatus which includes a stationary shaft, an upper drum rotatably coupled to the stationary shaft via at least one bearing, a boss fixed to a top portion of the stationary shaft, and a motor mounted in a top portion of the apparatus;

• wherein said ground device comprises:
• an anchor member anchored to an upper surface of the boss;
• an elastic member fixed to a bottom surface of the anchor member and extending downwardly through a bore in the boss;
• and
• a ground member fixed to a lower end of the elastic member, the ground member being in elastic contact with an outer race of said at least one bearing;
• wherein the elastic member comprises a compressed coil spring, and the anchor member has an embossed portion formed therein, said embossed portion extending downward from the bottom surface of said anchor member so as to extend into and be received by an interior portion of said compressed coil spring.