KR930008080Y1 - Head drum assembly for video tape recorder - Google Patents

Abstract

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Description

Head drum assay for videotape recorders

1 is a cross-sectional view of a conventional head drum assembly.

2 is a plan view of a conventional head drum.

3 and 4 illustrate a conventional head operating state.

5 is a top view of the head drum of the present invention.

6 is a front view of the head drum of the present invention.

7 is a cross-sectional view of the head drum assembly of the present invention.

8 is an exemplary view of a head operating state of the present invention .

* Explanation of symbols for the main parts of the drawings

2: upper drum 3: lower drum

6: flange 7: trans rotor

8: head 12: tape exit

13,13 ', 13 ", 13"': Pungikpyeon 14: Blower

A: Tape

The present invention relates to a head drum assay of a video tape recorder. In particular, the tape tape recorder is capable of eliminating the curvature and vibration of the screen by preventing the tape running and vibration caused by the friction between the tape and the video head at the tape exit. It is about the head drum assay of an order.

In the conventional conventional head drum structure, as shown in FIGS. 1 and 2, the shaft 5 press-fits the bearing 4 to the lower drum 3 and press-fits the flange 6 to the bearing 4. The trans rotor (7) is adhesively fixed to the flange (6).

In addition, the upper drum (2) equipped with a video head (8) is assembled on the flange (6), and the lower drum (3) is provided with a ring collar (9) to preload the bearing (4), The motor stator 10 and the motor rotor 11 are assembled here.

In this way, when the tape A is wound and traveled with the conventional head drum assay configured as described above, as shown in FIGS. 3 and 4, the video head 8 is rotated by about 40 mu more than the upper drum 2. .

At this time, since the video head 8 rotates at a higher speed than the tape A, as shown in FIG. 3 at the front of the head 8, the tape A is dragged and travels. The video head 8 does not accurately scan the jet lag, and the tape A is pulled away from the tape exit 12 so that the tape pulled out in the reverse direction as the head 8 exits. This affects the head 8, which reads the signal recorded on the tape from the opposite side, causing the screen to shake.

In addition, the tape A boiled in the head 8 at the outlet 12 vibrates in the transverse direction in the advancing direction, thus generating noise, which greatly affects the video set itself.

As described above, when the head 8 is separated from the tape exit 12 in the conventional head drum assay structure, the screen A is shaken or bent on the screen due to the reverse driving (or stopping) and the shaking of the tape A. When the phase of the color signal is shifted due to the vibration of the tape, part of the screen is shifted in color in a horizontal band shape, resulting in deterioration of image quality.

This phenomenon is more severe in the four-head type camcorder, and the noise caused by the tape's vibration is recorded during recording and playback, causing a lot of noise.

The present invention is to compensate for all the problems as described above to form a wind blade in the drum to blow the wind generated during rotation to the groove of the exit side as described in detail by the accompanying drawings as follows.

5 and 6 show a plan view and a front view of the head drum assay according to the present invention, and FIG. 7 shows an assembled sectional view.

Assemble the shaft (5) press-fit the bearing (4) to the lower drum (3) and press-fit the flange (6) to the bearing (4), the transformer (7) is fixed to the flange (6) and the flange (6) The structure of the head drum assembly, which is constructed by assembling the upper drum 2 having the video head 8 mounted thereon, and the motor stator 10 and the motor rotor 11 assembled below the lower drum 3, is conventionally used. It is the same thing as that of.

In the present application, the wind vane pieces 13, 13 ', 13 ", 13 "' are mounted on the upper portion of the trans rotor 7 fixed to the flange 6, but the wind vane pieces 13, 13 ', 13 ", 13 "') In front of the video head 8 so that the wind from the video head 8 is directed.

And the air outlet 14 is formed in the tape outlet 12 of the lower drum 3 so that the wind blowing from the wind vane pieces 13, 13 ', 13 ", 13"' can escape.

If described with the eighth effect of the present invention configured as described above as follows.

As the flange 6 rotates inside the lower drum 3 in a conventional manner, the wind vane pieces 13, 13 ', 13 ", 13"' formed on the upper side of the translator 7 rotate together to generate a wind. The air is blown out to the air blowing hole 14 formed in the tape outlet 12 of the drum 3 so that the tape A is always raised to a constant height, so that the video head 8 is detached from the tape A even when As it is separated and rotated smoothly by wind, it always generates wind when operating on the inner wind vane pieces 13, 13 ', 13 ", 13"' of the lower drum 3, and moves the wind from the inside of the tape outlet 12 to the outside. Since the tape A is always floated at regular intervals, there is no reverse driving and vibration caused by the drag phenomenon when the head 8 and the tape A are separated, resulting in the shaking of the screen or the layering of the bend and color signals. The spread phenomenon is eliminated and can reproduce high quality screen It was made.

Claims (1)

In the head drum assembly of the video tape recorder, a wind vane piece is formed on the top surface of the flange rotor 7 fixed to the flange 6, and a blow hole 14 is formed on the tape outlet of the lower drum. Head drum assay for videotape recorders, characterized by the possibility of injuring the tape due to wind from the wing.