JPS5824856B2 - Tape tape - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape drive device in a magnetic recording/reproducing device, and in particular, for fast forwarding and rewinding of the tape at the unloading completion position, and for tape drive during unloading and recording/reproducing. The present invention relates to a tape drive device in which the rotational torque of a reel stand is switched in each case of winding.

Generally, the winding torque of the reel stand needs to be strong for fast forwarding and rewinding, and weak for unloading and winding the tape during recording and playback.

For this reason, in the past, the reel stand was equipped with a slip mechanism that limited the rotational torque to a certain level or less, and in the case of fast forwarding and rewinding, it was either used directly or limited to the reel stand, or a slip mechanism was installed on the reel stand to prevent abnormal tension from being applied to the tape. During unloading and recording/playback, the reel table is driven through a slip mechanism that limits the rotational torque of the reel table to a certain level or less, thereby driving the reel table with a torque weaker than that used for fast forwarding and rewinding. The method was used.

In order to switch between them, a mechanism is used to move the idler up and down directly to the reel stand, or to press the idler to the limiter mechanism of the reel stand, or to the slip mechanism (an example is shown in Fig. 4a), or to the reel stand. A mechanism (an example is shown in Fig. 4) that presses or easily releases another idler configured to directly connect the stand and the slip mechanism section or the reel stand mechanism and the slip mechanism section to the reel stand. Because of this, it was necessary to provide the reel stand with a slip mechanism that limits the rotational torque of the reel stand to below a certain level, and to provide a complicated mechanism to switch the rotational torque of the reel stand.

The present invention provides a tape drive device that eliminates these drawbacks by electrically controlling the rotational torque of the reel stand drive motor without mechanically switching the rotational torque of the reel stand. be.

The present invention will be described in detail below with reference to the drawings showing one embodiment of the present invention.

Figures 1, 2, and 3 are schematic diagrams of the mechanism and operation of an embodiment of the present invention, with Figure 1 showing the unloading completed position and Figure 2 showing the state in the middle of unloading. , FIG. 3 shows the loading completion position, that is, the recording/reproducing state.

FIG. 4 shows a comparison between the conventional torque switching system and the embodiment of the present invention, and a in FIG.
The figure shows an example in which an idler is in pressure contact with a slip mechanism B that limits the rotational torque of the reel stand to below a certain level, or a mittter mechanism C that prevents abnormal tension from being applied to the tape. This shows a method in which another idler D, which is configured to directly connect the slip mechanism that limits the tension to below a certain level and the tension mechanism to prevent abnormal tension from being applied to the tape, is pressed against or detached from the reel stand, and C As an embodiment of the present invention, a method is shown in which the rotational torque of the reel stand is controlled by changing the voltage of the reel stand drive motor, using a reel stand having a miter mechanism E that prevents abnormal tension from being applied to the tape. It is something.

In FIG. 1, 1 is a cassette equipped with a supply reel and a take-up reel, 2 is a supply reel stand 3 is a take-up reel stand, 4 is a rewind idler, 5 is a fast-forward idler, and 6 is a rewind idler lever. , 7 is a rapid feed idler lever, and 8 is a reel stand driving roller.

The rewind idler 4 is always urged by a spring or the like in a direction in which it comes into pressure contact with the supply reel stand 2 and the reel stand drive roller 8, and the fast forward idler 5 is always urged in a direction in which it comes into pressure contact with the take-up reel stand and the reel stand drive roller 8. Forced.

Further, the idlers 4 and 5 are configured to be pulled in opposite directions by a plunger or other means (not shown) via the idler levers.

Reference numeral 9 denotes a brake for the take-up reel stand 3, which is always biased in the direction of pressing against the take-up reel stand 3, and is configured to be pulled in the opposite direction by a plunger or other means (not shown). ing.

10 is a rotary base, 11 is a rotary base 10
3 rollers that hold the 12 rotary base 1
0 is a protrusion for detecting the position, 13 is the protrusion 12
14 is an auxiliary pull-out arm.

15 is a drawer arm mounted on the rotary base 10, and the drawer arm 15 has a drawer pin 1.
γ and pinch rollers 18 are provided and guided by a guide rail 16.

A rotary base drive motor 19 drives the rotary base 10 via a rubber roller 20.

Reference numeral 21 indicates four tape guide pins, which are installed on the rotary base 10.

22 is a rotary head having one or more magnetic heads, 23
24 is a tension arm, 24 is a pinch roller-pressing lever, and 25 is a capstan shaft.

Next, the operation of the apparatus of the present invention constructed as described above will be explained.

First, insert cassette 1 into the cassette mounting position of the magnetic recording/reproducing device.
Load.

Next, when the loading mode is activated, the rotary base drive motor 19 , which is controlled by an auto circuit (not shown) or the like, moves the rotary base 1 , which is rotatably held by three rollers 11 via a rubber roller 20 .
Drive 0.

At this time, the auxiliary pull-out arm 14 pulls out the tape from the cassette 1 in synchronization with the rotation of the rotary base, and then the pull-out pin 17 provided on the pull-out arm 15 guided by the guide rail 16 engages the tape, and the rotary base 10 As the tape rotates, the tape is pulled out from the cassette 1 while being guided by the guide rail 16.

Next, the four tape guide pins 21 installed on the rotary base 10 sequentially engage the tape and attach the tape to the rotary head 22 over a predetermined angle range, and the rotary base 10 rotates approximately once, The pinch roller pressing lever 24 presses the pinch roller 18 onto the capstan shaft 25 to complete loading.

During loading, the rewind idler 4 and the fast forward idler 5 are operated by a plunger or other means (not shown).
The reel stand is pulled away from the reel stand and the reel stand drive roller 8 via the rewind idler lever 6 and the fast forward idler lever, and the brake 9
is brought into pressure contact with the take-up reel stand 3 by a biasing force such as a spring, thereby stopping the take-up reel 3.

Further, when loading is completed, the tension arm 23 is rotated in synchronization with the rotation of the rotary base by using the rotation of the rotary base 10 or by other means (not shown).
starts the tension servo and presses the fast-feed idler 5 against the take-up reel stand 3 and the reel stand drive roller 8 by the bias of the spring, and the brake 9 uses the rotation of the rotary base or other means such as a plunger. (not shown) to separate from the take-up reel stand 3,
The brake of the take-up reel stand 3 is released and a recording/reproducing state is entered.

At this time, as shown in FIG. 3, the switch 13 for detecting the position of the rotary base is in a de-energized state, and a control circuit (not shown) that controls the rotational torque of the reel stand drive motor (not shown) , the rotational torque of the reel stand drive motor is controlled by means such as reducing the voltage applied to the reel stand drive motor,
The take-up reel stand 3 takes up the tape with a weak torque.

As described above, the loading and recording/reproducing states operate, and unloading is performed by performing an operation that is almost the opposite to that described above. During unloading, the brake 9 is applied to the take-up reel stand 3 by the bias of the spring. pressure contact,
The take-up reel stand 3 is stopped, the fast-forward idler lever 7 is pulled by a plunger (not shown), and the fast-forward idler 5 is separated from the take-up reel stand 3 and the reel stand drive roller 8, and the rewind idler 4 is The tape is wound up by being pressed against the supply reel stand 2 and the reel stand driving roller 8.

At this time, as shown in FIG. 2, the switch 13 for detecting the position of the rotary base 10 is in a non-energized state, and the control circuit (not shown) that controls the rotational torque of the reel stand drive motor (not shown) Therefore, the rotational torque of the reel stand 1 drive motor is controlled by means such as lowering the voltage applied to the reel stand drive motor, and the supply reel stand 2 winds the tape with a weak torque.

Next, when the fast forward mode is activated at the unloading completion position, the plunger (not shown) pulls the brake 9, the brake of the take-up reel stand 3 is released, and the plunger (not shown) By pulling the rewind idler lever 6, the rewind idler 4 is disengaged from the supply reel stand 2 and the reel stand 1 drive roller 8, and the fast forward idler 5 is moved to the take-up reel stand 3 and the reel stand drive roller 8 due to the bias of the spring. Pressure contact and take-up reel stand 3
is driven to perform fast forwarding, and when the rewind mode is activated, the plunger (not shown) pulls the brake 9, the brake of the take-up reel stand 3 is released, and the plunger (not shown) pulls the brake 9. pulls the fast-forward idler lever γ, winds up the fast-forward idler 5, and reels the reel stand 3.
Then, the unwinding idler 4 is brought into pressure contact with the supply reel base 2 and the reel base drive roller 8 by the bias of the spring, and the supply reel base is driven, thereby performing rewinding.

At this time, as shown in FIG. 1, the protrusion 12 for detecting the position of the rotary base 10 is energized by the switch 13, and at this time, a control is performed to control the rotational torque of the reel stand drive motor (not shown). A circuit (not shown) controls the rotational torque of the reel base drive motor to increase by, for example, increasing the voltage applied to the reel base drive motor, and the take-up reel base is controlled to increase during fast forwarding.
The supply reel stand winds the tape with strong torque during rewinding.

According to the present invention, a loading device including a rotary base that automatically performs a loading operation of pulling out a tape from a cassette and loading it on a predetermined running path, and an unloading operation of storing the loaded tape in the cassette; A detection means for detecting the position of the rotary base, a supply reel stand for placing the supply reel, a take-up reel stand for placing the reel to be taken up, a reel stand drive motor for driving both reel stands, and the reel stand drive. In a magnetic recording and reproducing apparatus, which includes a control means for controlling the rotational torque of the motor according to the position of the rotary base, and an idler for transmitting the rotation of the reel stand drive motor to both reel stands, the tape is recorded at the unloading completion position. fast forward,
The rewinding, unloading, and winding of the tape during recording and playback are detected by detecting the position of the rotary base. The torque of the reel stand drive motor is electrically controlled by the detection means and detection signal that only detects whether the rotary base is at the unloading completion position or at any other position. The rotational torque of the reel stand can be controlled by a simple configuration with a control circuit, and the reel stand's slip mechanism, which is required to mechanically switch the rotational torque of the reel stand, the use of the upper and lower idlers, or the use of a separate idler. It is possible to omit complicated mechanisms such as

[Brief explanation of the drawing]

Figures 1, 2, and 3 are schematic views of the mechanism and operation of an embodiment of the present invention, with Figure 1 showing the unloading completed position and Figure 2 showing the state in the middle of unloading. , FIG. 3 shows the loading completion position, that is, the recording/reproducing state. FIG. 4 shows a comparison between the conventional torque switching system and the embodiment of the present invention. In FIG.
b shows a torque switching method using another idler 〇, and c shows an embodiment of the present invention. In these drawings, 1 is a cassette, 2 is a supply reel stand, 3 is a take-up reel stand, 4 is a rewind idler,
5 is a rapid feed idler, 8 is a reel stand driving roller, 1
0 is a rotary base, 12 is a protrusion for detecting the position of the rotary base, 13 is a switch for detecting the position of the rotary base, 14 is an auxiliary drawer arm, 15 is a drawer arm, 16 is a guide rail, 17 is a drawer pin, 18 is a pinch roller.

Claims (1)

[Claims] 1. A loading device including a rotary base that automatically performs a loading operation for pulling out a tape from a cassette and loading it on a predetermined running path, and an unloading operation for storing the loaded tape in the cassette;
a detection means for detecting the position of the rotary base; a supply reel stand for placing the supply reel; a take-up reel stand for placing the take-up reel; a reel stand drive motor for driving both reel stands; In a magnetic recording/reproducing device comprising an idler or the like that transmits the rotation of a base drive motor to both reel bases, fast forwarding of the tape is performed at the unloading completion position based on the detection output of the rotational position of the rotary base by the detection means. A means for detecting and determining a rewinding operation, an unloading operation, and a tape winding operation during recording and reproduction, and means for electrically controlling the torque of a reel stand drive motor in accordance with the determination made by the means are provided. 1. A tape drive device in a magnetic recording/reproducing device, characterized in that the torque of a reel stand drive motor is controlled according to the rotational position of the rotary base.