KR940007283B1 - Recording reproduction apparatus of optical tape - Google Patents

Abstract

The relative speed between a rotating drum and an optical tape is kept constant so that tracking is easily done. The apparatus includes a pinch-roller (4) depositing on an optical tape path, a capstern shaft (5) having a coupler (5a), a rotating deck (7) having a charge wheel gear (8) and a balance weight (9), a supporting shaft (10) for supporting a boss (7c), a capstern driver (12) for driving a capstern shaft (5), and a motor (11).

Description

Optical tape recording / reproducing device

1 (a) and (b) are perspective views showing conventional recording / reproducing apparatuses of optical tape.

2 shows an optical tape recording / reproducing apparatus according to the present invention.

(a) is a separate section,

(b) is an excerpt perspective view showing a state in which the optical tape is wound around the rotating drum shown in (a).

* Explanation of symbols for main parts of the drawings

1: rotating drum 2: supply reel

3: winding reel 4: pinch roller

5: capstan shaft 5a: coupling part (of capstan shaft)

7: rotating deck 7a: fixed part

7b: gear portion 7c: boss

8: Transmission Gear Group 9: Balance Weight

10: support shaft 10a: first gear

11: motor 11a: second gear

12: capstan shaft drive member

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical tape recording / reproducing apparatus, and more particularly, to an optical tape recording / reproducing apparatus for maintaining a constant speed between a rotating drum and an optical tape to facilitate tracking of an optical head.

In general, the optical recording method has advantages such as high recording density, high reliability due to non-contact of the head and the recording medium, long life, etc., so that optical discs such as compact discs and laser discs are used. However, since optical discs have a limited data capacity, it is difficult to use them in video signals or large-capacity information processing devices. Therefore, it is desirable to use optical tapes having very large data capacities.

FIG. 1 shows a conventional optical tape recording / reproducing apparatus. First, FIG. 1 (a) is a 3M patent disclosed in US Pat. No. 4,939,715, which is an optical tape on one side of the rotating drum 10. FIG. Inlet and outlet (10a) of (7) is provided, the supply reel 11 and the winding reel (12) and the tape advance and rewind capstan shaft 13 which is installed in the rotary drum 10 in the up and down coaxial 14 is installed. The supply reel 11, the winding reel 12, the tape advancing and rewinding capstan shafts 13 and 14 are separately driven by four motors (not shown) installed in the rotating drum 10, and the rotating drum 10. Is rotated at high speed by a drum driving motor (not shown). However, the patent of 3M company configured in this way takes 5 motors, and in particular, the motor which drives the tape advance and rewind capstan shafts 13 and 14 has a problem that a precise motor must be used for accurate tracking. Since it rotates as shown in (0), there is a problem that the structure of the brush for supplying power to each motor from the non-rotating portion of the deck 15 is complicated.

Figure 1 (b) is a patent of Kodak (KODAK) of the United States Patent No. 4,764,826, which is installed so that the rotating drum 20 is rotated at high speed by the drum drive motor 21, the interior of the rotating drum 20 The feed reel 22 and the winding reel 23 is provided coaxially, and the supply reel 22 and the winding reel 23 are installed to be rotated by the reel driving motor 24 (not shown 25). Is the optical system, 26 is the control unit)

However, Kodak's patent, which is configured in this way, does not have many motors as in the above-mentioned 3M company, and one reel drive motor 24 and one drum drive for rotating the supply drum and the reel with a clutch using a clutch are rotated. It is composed of a motor 21, but the structure is relatively simple, which has a problem that it is difficult to control the precise speed of the reel drive motor for driving the supply reel and winding reel.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide an optical tape recording / reproducing apparatus capable of maintaining a constant relative speed between a rotating drum and an optical tape.

In order to achieve the above object, the present invention, the optical tape inlet, outlet is formed on one side and the supply drum and the winding reel is installed coaxially therein, and the rotating drum installed on the deck to drive the rotating drum An optical tape recording / reproducing apparatus provided with a driving means, comprising: a capstan shaft having a pinch roller and a coupling portion formed thereon on an optical tape traveling path between a supply reel and a winding reel of the rotating drum and an optical tape inlet and outlet; Is installed, the rotating drum drive means, the upper surface is provided with a fixed portion for fixing the rotating drum, the lower surface is provided with a boss formed with a gear portion on the outer surface, the transmission gear group and the balance deck provided with a balance weight therein, A support shaft coupled to the boss to rotatably support the first shaft, the first gear being fixedly engaged to the transmission gear group at a distal end thereof; A capstan shaft driving part coupled to the coupling portion of the capstan shaft and driving the camstan shaft, and a second gear meshed with the gear portion formed on the boss, the motor being installed on the rotation shaft. It has its features.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

2 shows an optical tape recording / reproducing apparatus according to the present invention, in which optical tape inlets and outlets 1a and 1b are formed at one side of the rotating drum 1, and a supply reel is provided therein. (2) and the winding reel (3) is installed coaxially, the rotating drum on the optical tape running path between the supply reel (2) and the winding reel (3) and the optical tape inlet, outlet (1a) (1b) ( 1), the pinch roller 4 and the capstan shaft 5 in which the engaging part 5a was formed in the lower part are provided. And deck (6) is provided with a rotating drum driving means for driving the rotating drum (1), which is provided with a fixed portion (7a) is fixed to the rotating drum (1) on the upper surface, the gear portion on the outer peripheral surface on the lower surface A boss 7c having a 7b formed therein, and a rotation deck 7 in which a gear group 8 and a balance weight 9 are installed therein; The support shaft 10 is fixed to the deck (6), is coupled to the boss (7c) to support it rotatably, and the first gear (10a) is fixed to the front end gear meshing with the transmission gear group (8) and; A motor 11 installed on the deck 6 and having a second gear 11a engaged with the gear portion 7b formed on the boss 7c on the rotation shaft thereof; It is provided on the rotation shaft of the final gear (8a) of the transmission gear group (8), and has a capstan shaft drive member 12 for driving the capstan shaft (5) coupled to the engaging portion (5a) of the capstan shaft (5) (Not shown 5 'is a guide shaft, 13 is a reel drive motor, 13a is a clutch).

The recording / reproducing apparatus of the optical tape according to the present invention configured as described above is operated as follows. First, when the motor 11 is driven, the second gear 11a installed on the rotating shaft of the motor 11 and the boss 7c engaged therewith. As the rotating deck 7 rotates about the support shaft 10 at a high speed by the gear part 7b of the rotating wheel, the rotating drum 1 fixed to the upper surface of the rotating deck 7 is rotated. ) Will be rotated at high speed. The rotation deck 7 is rotated, and the reduction gear group 8 engaged with the rotation gear 7 is rotated by the first gear 10a fixed to the front end of the support shaft 10, and the end of the reduction gear group 8 is rotated. As the capstan shaft driving part 12 provided in the gear 8a is decelerated and rotated at the reduction ratio of the reduction gear group 8, the capstan shaft 5 to which the capstan shaft driving member 12 is coupled is connected to the reduction gear group 8. The optical tape is advanced by decelerating and rotating at the reduction ratio. Therefore, if the rotational speed of the rotating drum drive motor 11 is kept constant, the relative speed of the optical tape with respect to the rotating drum 1 can be kept constant at all times, and the reel driving motor 13 does not need special control. It is sufficient to give only a predetermined torque to the winding reel. And the balance weight (9) serves to prevent the vibration during the rotation of the rotating deck (7).

As described above, in the optical tape recording / reproducing apparatus of the present invention, the capstan shaft can be decelerated and rotated within the reduction ratio of the reduction gear group so that the relative speed of the optical tape with respect to the rotating drum is maintained by keeping the rotational speed of the drum drive motor constant. It can be kept constant all the time, making it easy to track the optical head, reducing the number of motors used compared to 3M's structure, and eliminating the need for precise control of reel drive motors as in the case of Kodak. There is an advantage that can be completely separated.

Claims (1)

Recording and recording of an optical tape having an optical tape inlet and an outlet formed at one side thereof, and having a rotating drum having a feeding reel and a winding reel coaxially installed therein, and a rotating drum driving means installed at the deck to drive the rotating drum. In the reproducing apparatus, the pinch roller (4) on the optical tape running path between the supply reel (2) and the winding reel (3) of the rotary drum (1) and the optical tape inlet and outlet (1a) (1b) and its A capstan shaft 5 having a coupling portion 5a formed thereon is provided, and the rotating drum driving means is provided with a fixing portion 7a on which the rotating drum 1 is fixed on an upper surface thereof. A boss 7c having a part 7b formed therein, and a rotation deck 7 provided with a gear group 8 and a balance weight 9 therein; The support shaft 10 is coupled to the boss 7c and rotatably supports the first gear 10a fixedly coupled to the transmission gear group 8 at the distal end thereof, and the last of the transmission gear group 8 is fixed. A capstan shaft driving member 12 installed on the rotation shaft of the gear 8a and coupled to the engaging portion 5a of the capstan shaft 5 to drive the capstan shaft 5; and a gear formed on the boss 7c. An optical tape recording / reproducing apparatus, characterized in that a second gear (11a) meshing with the portion (7b) is provided with a motor (11) provided on its rotating shaft.