JPH0477979B2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a recording or reproducing device equipped with a loading mechanism that moves a record carrier guide means to a predetermined position in conjunction with the movement of a movable loading means that loads a strip-shaped record carrier. It is something.

(Prior art) For example, according to an autoloading mechanism in a VTR, when a loading ring rotates in the loading direction, the tape is pulled out by the loading post or tape guide member located on the back of the tape in the cassette, and the tape is placed on a rotating drum. The tape is further wound around a fixed tape guide member, and the tape is brought into contact with a recording or reproducing head to complete loading and perform recording or reproduction.

During unloading, the loading ring is rotated in the unloading direction at a predetermined rotational speed, and during this time, the tape that is stretched around the loading post or tape guide member is wound up by a reel that is rotated at a predetermined rotational speed. It's on. During unloading, there is a portion where the tape guide member moves significantly. When the tape reel guide member moves significantly in this way, the amount of tape to be wound increases beyond the amount of tape that can be wound on the reel because the reel is rotated at a predetermined rotational speed. The remaining portion of the tape may be left slack, which may cause damage to the tape or failure of the loading mechanism.

In order to eliminate this problem, a torque limiter mechanism is installed on the reel, which increases the rotational speed of the reel and winds the tape while causing slippage.
In other words, the tape is wound with a configuration that increases the amount of tape that can be wound on the reel, or by lowering the voltage applied to the reel drive motor and the loading ring drive motor and setting the rotational speed of these motors to a low speed from the beginning. Structures have been proposed to prevent abnormal tension from being applied to the tape, but both have complicated mechanisms, and the latter in particular has the drawback of requiring a long time for unloading.

(Objective) The present invention solves the drawbacks of the prior art described above, and is aimed at solving the problem of sagging of the record carrier, which is a concern when the record carrier guide member that is linked to the moving operation of the loading member makes a large movement during unloading. It is an object of the present invention to provide a recording or reproducing device having a configuration that allows winding of a record carrier to be performed well without causing any problems, and reduces the time required for unloading.

(Example) Hereinafter, the means taken in the present invention to achieve the above-mentioned object will be illustrated and explained with reference to the drawings.

1 to 3 show an embodiment of the recording or reproducing apparatus of the present invention, and show the states at the start of unloading, at the end of loading, almost at the end of unloading, or at the end of unloading, respectively. 1 to 3 are shown with the top cover of the cassette removed.

In FIG. 1, 1 is a tape 2 which is a record carrier.
The tape 21 is wound around a supply reel 22 and a take-up reel 23, which are winding means, respectively. Reference numeral 2 denotes a loading ring constituting a part of the loading means, which is equipped with a cam 2a and is located around a rotating drum 13, which is a recording and reproducing means equipped with a rotating magnetic head for recording and reproducing. A motor 3 is a driving means for driving the loading ring 2, and a gear 3 is attached to the motor 3.
a is meshed with a gear provided on the outer peripheral side of the loading ring 2, and the loading ring 2
is rotated by the motor 3 in the loading and unloading directions. 4 is a switch that detects a predetermined rotation range of the loading ring 2 during unloading, and when the loading ring 2 starts rotating for unloading and rotates to the position shown in FIG. When the movable tape guides 5 and 6 are moved toward their original positions, they engage with the cams 2a to generate detection signals, which are input to the motor control circuit 24 that controls the speed of the motor 3. The control circuit 24, which receives this detection signal, lowers the voltage applied to the motor 3 and lowers its rotational speed. Numeral 7 is an erasing head for erasing all signals recorded on the tape 21, and 10 is a fixed head for recording and reproducing audio signals, CTL signals, queue signals, etc. 8, 9, 11 are fixed tape guides,
Reference numerals 5 and 6 indicate movable tape guides 14 and 15 that act as tape guide means that move between the positions shown in FIGS. 1 and 2 and the position shown in FIG. 3 in conjunction with the rotation of the loading ring 2. , 16 is a moving post for expanding the tape angle that moves between the position shown in FIG. 1 and the position shown in FIG. 3 in conjunction with the rotation of the loading ring 2, and 17, 18, and 20 are loading rings. The tape loading post moves between the position shown in FIG. 1 and the position shown in FIG. 3 as the tape loading ring 2 rotates, and constitutes a loading means together with the loading ring 2.

In the loading completion state (Fig. 1),
The tape 21 is stretched over fixed tape guides 8, 9, 11, moving posts 14, 15, 16, loading posts 17, 18, 20, movable tape guides 5, 6, and rotating drum 13, and in this state. A full width erasing head 7 and a fixed head 10 are each in contact with the tape 21. Note that 12 is a capstan, and 19 is a pinch roller that moves together with the loading post 20.

In this configuration, when unloading is started, the motor 3 rotates clockwise at a predetermined rotational speed under the control signal of the control circuit 24 responsive to the command signal, and rotates the loading ring 2 counterclockwise. let As the loading ring 2 rotates counterclockwise, the loading posts 17 and 1
8, 20, pinch roller 19, moving post 14,
15, 16, movable tape guides 5, 6 also move,
As a result, the path along which the tape 21 is stretched is shortened, and the remaining tape 21 is rotated by a reel drive motor (not shown) provided below the cassette 1 and wound onto the supply reel 22 or the take-up reel 23. . From the unloading start state shown in FIG. 1 to the state near the completion of unloading shown in FIG. Changes in the tape length of the stretched tape 21 depend solely on the movement of the loading posts 17 and 18, which move one-to-one with the loading ring 2, so that the amount of change in tape length at this time depends on the amount of supply. By making the tape winding amount by the reel 22 or the take-up reel 23 slightly larger, the tape 21 is wound onto the supply reel 22 or the take-up reel 23 without causing slack. However, the movable tape guide 5,
6 moves, so the tape 2 wrapped around it
Since the change in the length of the tape 1 will be larger than before, when the loading ring 2 is rotated at a predetermined rotation speed, there will be some unrolled tape 21 stretched over the movable tape guides 5 and 6, and the slack will be removed. It will happen.

Therefore, when the loading ring 2 reaches the position shown in FIG. 2, that is, the position where the movable tape guides 5 and 6 start moving in the direction of the cassette 1, the rotation range is detected to indicate that the loading ring 2 has reached that position. The switch 4 detects this and provides this detection signal to the control circuit 24. From then on until the unloading is completed, the control circuit 24 controls the motor 3.
Lower the voltage applied to the motor and reduce its rotational speed. As a result, the rotational speed of the loading ring 2 is reduced, and therefore the rate of change per unit time of the length of the tape 21 stretched over the movable tape guides 5 and 6 can be reduced, and the tape 21 is Since the tape 21 is reliably wound onto the reel or take-up reel 23, no slack is caused in the tape 21. In this way, the loading ring 2 continues to rotate at a reduced rotational speed, and the tape 21 is wound onto the supply reel 22 or the take-up reel 23 until the unloading completion shown in FIG. 3 is reached.
During this time, the movable tape guides 5, 6 are accommodated in the cassette 1 following the loading posts 17, 18, 20, the pinch roller 19, and the moving posts 14, 15, 16. The position of the loading ring 2 at the time of completion of unloading is detected by another detection device (not shown), and the command signal to the control circuit 24 is cut off by this detection signal.
stops the power supply to the motor 3 and stops it.

In the embodiment described above, the rotational speed of the loading ring 2 is reduced from a position near the completion of loading shown in FIG. 2 to the completion of unloading shown in FIG. 3. using the second signal
During the period from the state shown in the figure to the state shown in FIG. Supply reel 22 or take-up reel 2
The winding speed of the tape 21 may be increased, thereby making it even more effective in preventing the tape 21 from sagging.

In addition, in the configuration of the embodiment, the motor 3 is operated in the range from the position shown in FIG. 2 of the loading ring 2 to the position shown in FIG.
Therefore, since the loading ring 2 is decelerated, the speed at which the tape is pulled out by the movable tape guides 5 and 6 is reduced during tape loading, and therefore, unreasonable tension is applied to the tape 21 during tape loading. An additional effect is that there is no problem.

(Effects) As explained above, according to the present invention, the moving speed of the loading member is maintained at a relatively high speed from the start of unloading until before the record carrier guide member, which is linked to the moving operation of the loading member, starts its return movement. However, since the moving speed of the loading ring member is reduced from the time when the record carrier guide member starts its return movement until the time when unloading is completed, the moving speed of the loading ring member is reduced, so that the record carrier winding means can be moved without causing any unwinding on the record carrier. In addition to being able to be wound up, the unloading time can be shortened compared to the conventional method in which the loading member is moved at a low speed from the start of unloading.

[Brief explanation of the drawing]

1 to 3 show plan views of an embodiment of the recording or reproducing apparatus of the present invention, FIG. 1 is an explanatory diagram of the state before unloading starts, and FIG. 2 is an explanatory diagram of the state when unloading is almost completed. FIG. 3 shows an explanatory diagram of a state in which unloading is completed. In the figure, 1 is a cassette, 2 is a loading ring, 3 is a motor for driving the loading ring, and 4 is a loading ring.
1 is a rotation range detection switch, 5 and 6 are movable tape guides, 14, 15, and 16 are movable posts, and 17 and 1 are movable tape guides.
8, 20 are loading posts, 19 is a pinch roller, 8, 9, 11 are fixed tape guides,
12 is a capstan, 13 is a rotating drum, 7 is a full-width erasing head, 10 is a fixed head for recording and reproducing, 21 is a tape, 22 is a supply reel, 23 is a take-up reel, and 24 is a control circuit.

Claims (1)

[Scope of Claims] 1. A recording or reproducing device that is loaded with a record carrier storage container that houses a strip-shaped record carrier and is equipped with a winding means for winding up the record carrier, the recording or reproducing device including the following: a loading member that is movable for loading the record carrier onto a recording or reproducing means; and the record carrier that is moved to a predetermined position in conjunction with the moving operation of the loading member and is pulled out at the predetermined position. a guide member for guiding the loading member; a driving means for driving the loading member; during unloading, when the guide member is moved toward the original position during the movement of the loading member in the unloading direction; A recording or reproducing apparatus comprising: a control means for reducing a moving speed of the loading member driven by the drive means.