JPS6152528B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an erasing device for a reciprocating recording type tape recorder, and in particular, it is capable of storing the previous mode state even after switching from forward recording or reverse recording mode to stop mode, thereby storing the erasing head system. By configuring the tape to remain in the same state as before, recording can be started quickly without any unerased parts at the beginning of the tape when the same recording mode as the previous mode is set (especially reverse recording mode) after stopping. An object of the present invention is to provide an erasing device for a reciprocating tape recorder configured to enable the erasing of data.

In a conventional tape recorder capable of reciprocating recording, the erasing head system is configured such that when the tape recorder is placed in a stop mode, the forward erasing head is always connected so as to be operable. Therefore, when forward recording is interrupted and forward recording is performed again, the recording operation can be started quickly without any trouble. but,
When reverse recording is interrupted midway and restarted, the following inconvenience occurs. In other words, the erase head system automatically switches from the reverse erase head to the forward erase head upon conversion to the stop mode.
It is necessary to switch the erase head thread by the next reverse recording operation. This erasing head switching requires a certain amount of time. Therefore, if an attempt is made to operate the tape drive system at the same time as the reverse recording operation, an unerased portion will remain at the beginning of the tape. Furthermore, if this unerased portion is to be eliminated, it is necessary to operate the tape drive system with a delay, which delays the start of recording.

The present invention is constructed to eliminate the above-mentioned delay in starting recording, and one embodiment thereof will be described below with reference to the drawings.

FIG. 1 shows the main parts of the tape recorder in a forward recording mode, and FIG. 2 shows a state in which the forward recording mode is changed to a stop mode (referred to as forward stop). FIG. 3 shows a state in reverse recording mode, and FIG. 4 shows a state in which stop mode is selected from reverse recording mode (referred to as reverse stop). Figure 5 shows the configuration of the pinch roller part,
FIG. 6 shows the main part of the mode storage mechanism which is the main part of the present invention. FIG. 7 shows an electric circuit, particularly an erasing head system, which cooperates with the tape recorder, and the same reference numerals are given to the same components as those shown in FIGS. 1 to 4.

In Fig. 1, 1 and 2 are cassette reel shafts, 3,
4 is a capstan, which rotates in the direction of the arrow. 5 is a forward erasing head, 6 is a reverse erasing head, and the central recording/playback head 7
It is fixed on the head board 8 at positions on both sides of the head board 8.

The recording/reproducing head 7 is a two-track head, and is configured to rotate 1/2 by a gear 9 and a sector gear 10. A vertical support plate 11 is fixed to the rear end of the head board 8, and moves integrally with the head board 8, as will be described later. The gears 9 and 10 are in mesh with each other and are pivotally supported on a vertical support plate 11, and the recording/reproducing head 7 is provided to rotate together with the gear 9.

The pinch rollers 12 and 13 are held at the tips of pinch roller holding arms 14 and 15, respectively, and are opposed to the capstans 3 and 4. Each arm 14, 15 has a shaft 17 on the chassis 16, respectively.
and 18. A torsion spring 19 is incorporated into the forward pinch roller holding arm 15 as shown in FIG. Tebane 19
One arm is locked. The reverse pinch roller holding arm 14 is also configured in the same manner.

Next, the mechanical mode storage mechanism which forms the main part of the present invention will be explained.

Reference numeral 21 denotes a storage rotary plate, which has a substantially cross shape as shown in FIG. This memory rotation plate 21 consists of a triangular head 21a, left and right arm parts 21b, 21c, and leg parts 21d,
By the action of the toggle spring 25 provided between the pin 23 of the leg 21d and the pin 24 on the lower surface side of the chassis 16, the rotation position (forward recording storage position) shown by the solid line in FIG. It is selectively set to the rotational position (reverse recording storage position) shown by .

26 is a sliding lever, and long holes 26a, 26
b, 26c are the shaft 22, pin 24, and pin 2, respectively.
7 so as to be slidable in the directions of arrows A and B. This sliding lever 26 has a long hole 26d that is locked and guided by a pin 28 that is set on one arm 21b of the storage rotation plate 21, and slides in accordance with the rotation of the storage rotation plate 21. It is as follows. Further, bent arms 26e and 26f projecting above the chassis 16 are formed at both ends of the sliding lever 26.

In addition, a pair of bent pieces 26g of the sliding lever 26,
During 26h, the rotating arm 1 of the sector gear 10
The tip of 0a is inserted. This rotating arm 10a
A toggle spring 30 is provided between the tip of the vertical support plate 12 and a pin 29 installed at the bottom of the vertical support plate 12.

31 is a drive lever, and its elongated holes 31a, 3
1b is provided so as to be slidable while being guided by pins 24 and 28, respectively, and its base side is connected to a mode switching plunger 32. A rotating lever 33 is connected to the tip of the drive lever 31, and a coil spring 35 is stretched between the rotating lever 33 and a pin 34 on the chassis 16. Due to the tensile force of the coil spring 35, the drive lever 31 and the rotation lever 3
3 normally slides in the direction of arrow B. A locking pin 36 is installed at the tip of the rotating lever 33.

The storage rotation plate 21, the sliding lever 26, the drive lever 31, and the rotation lever 33 are located in the same vertical plane.

Reference numeral 37 denotes a mode changeover switch, which is fixed on the chassis 16, and is engaged by its bending arm 26e and switched as the sliding lever 26 slides.

38 is a plunger for moving the head board.

Next, the operation of the apparatus with the above configuration will be explained.

First, the operation of changing the tape recorder from the forward recording mode to the stop mode and then again to the forward recording mode will be described.

In the forward recording mode shown in Figure 1, the seventh
Each of the switches 40 to 43 in the figure is in the connected state shown by the solid line, the forward erase head 5 is operating, and the forward display photodiode is in operation.
D ₁ is lit. Now, when the stop button 44 is pressed, the control circuit 45 is operated and the relay RL ₁ and the plunger 38 are deenergized. As the relay RL ₁ is deenergized, the output switch 43 of the oscillation circuit 46 is opened as shown by the broken line.

When the plunger 38 is deenergized, the head base plate 8 moves back in the direction of arrow D together with the heads 5 to 7 due to the tensile force of the coil spring 39. As the head board 8 retreats, the pinch roller holding arms 14 and 15 rotate, and the pinch rollers 12 and 13 separate from the capstans 3 and 4.

This puts the tape recorder in forward stop mode. At this time, the rotation memory plate 21 and the sliding lever 26 are held in the same state as in the forward recording mode. This maintains both switches 37 and 40 in the connected state shown. Further, the switch 42 is connected to the FWD terminal side, and the erase head system remains set to the forward side.

Next, when the forward button 47 and the recording button 48 are pressed to return the tape recorder to the original forward recording mode, the plunger 32 does not operate, but the control circuit 45 operates, and the plunger 3
8. Relay RL ₁ is activated. Plunger 3 here
The reason why the switch 2 does not operate is because the switch 40 is connected to the REV side, and the reason why it does not need to operate is because the erase head system is already set to the forward side. The energization of relay RL ₁ closes switch 43, and forward erase head 5 immediately operates. Also plunger 3
No special delay circuit is inserted and connected to the operation circuit 8, and the plunger 38 is immediately excited and activated by the above operation. This operation of the plunger 38 brings the area around the head into the state shown in FIG. 1, and the forward recording operation is started immediately without leaving any unerased portions at the head of the tape.

As the head board 8 moves in the direction of arrow C, the pinch roller holding arms 14 and 15 move the pinch roller 1
2 and 13 in the direction of bringing them closer to the capstans 3 and 4, respectively. At this point, the sliding lever 26 is in the direction of arrow A.
As the arm 14 on the reverse side moves in the direction, the arm 14 on the reverse side is stopped by the bent arm 26e and its rotation is restricted midway, and the pinch roller 1 on the reverse side
2 does not make contact with the capstan 3. Only the arm 15 on the forward side rotates without being restricted by the bending arm 26f, and the pinch roller 13 selectively rolls into contact with the capstan 4 via the tape by the elastic restoring force of the torsion spring 19, so that the tape moves in the forward direction. It is driven.

In addition, when the reverse button 49 and the recording button 48 are pressed during the forward stop mode described above, the plunger 32 is temporarily activated, and the drive lever 31 is activated.
moves in the direction of arrow A. As described later, the movement of the drive lever 31 switches the mechanical mode storage section to a reverse recording mode storage state. That is, due to the above movement of the drive lever 31, the locking pin 36 of the rotation lever 33 is guided to one slope 21a _-1 of the triangular head 21a of the storage rotation plate 21, as can be seen from FIG. , rotation lever 33
It moves along the slope 21 _a-1 with the rotation, and reaches the end surface 21 _c-1 of the arm portion 21c. As the drive lever 31 moves further in the same direction, the rotating plate 21 locks the arm portion 21c with the locking pin 36, resisting the counterclockwise rotational force biased by the toggle spring 25. Rotate clockwise. When the rotating plate 21 passes the rotational neutral point, it is now given a clockwise rotational force by the elastic force of the toggle spring 25 and rotates actively in the same direction, and finally, as shown in FIG. It is held at the rotational position indicated by the two-dot chain line by applying a clockwise rotational force. When the plunger 32 is deenergized, the levers 31 and 33 slide back in the direction of arrow B due to the tensile force of the coil spring 35.

Due to the clockwise rotation of the rotating plate 21, the sliding lever 26 is pushed through the elongated hole 26d by the pin 28 and slides in the direction of arrow B, and is maintained in this state even after the plunger 32 is deenergized. This causes the mechanical storage mechanism to enter the reverse recording mode storage state.

Further, due to the above-mentioned movement of the sliding lever 26, the sector gear 10 rotates clockwise, and the toggle spring 30 applies a clockwise rotational force. As the sector gear 10 rotates, the recording/reproducing head 7 rotates by half a rotation via the gear 9.

In addition, the switch 37 is pushed and switched by the movement of the sliding lever 26, and is switched to the REV contact side, and in conjunction with this, the switch 40 is also switched.
Switched and connected to the FWD contact side. By switching the switch 37, the transistor Tr becomes conductive and the relay RL ₂ is energized. By energizing relay RL ₂ , switches 41 and 42 are both switched to the REV contact side, the reverse display photodiode D ₂ lights up, and the erase head system is set to the reverse erase head 6 side. The switching state of each switch is indicated by a broken line.

Furthermore, the above operation operates plunger 38 and relay RL ₁ , and the tape recorder enters the reverse recording mode as shown in FIG.

Next, the operation when the tape recorder is stopped during the above-mentioned reverse recording mode and then set to the reverse recording mode again will be described.

When the stop button 44 is pressed while the reverse recording mode is connected, the control circuit 4 is activated as in the previous case.
5 operates, plunger 38 and relay RL ₁ are demagnetized, head board 8 returns to the direction of arrow D, and oscillation circuit 46 causes reverse erase head 6 to be activated.
The circuit leading to is opened. As a result, the tape recorder enters the reverse stop state shown in FIG.

At this time, the mechanical mode storage mechanism remains in the same state, ie, the reverse recording mode storage state. As a result, the erase head system remains set on the reverse erase head 6 side.

Next, press the record button 48 to resume reverse recording.
When the and reverse button 49 are pressed at the same time, the plunger 38 and relay _RL1 are immediately energized and activated without waiting for switching of the erasing head system as in the conventional case.

The reason why there is no problem even if the plunger 38 is immediately energized is that the erasing head system is maintained switched to the reverse recording erasing head 5 side as described above.

The actuation of the plunger 38 brings the area around the head into the state shown in FIG. 3, and the reverse recording operation begins immediately and without leaving any unerased portions at the head of the tape.

At this time, since the sliding lever 26 is moving in the direction of arrow B, when the head board 8 is moved in the direction of arrow C by the plunger 38, the forward side pinch roller holding arm 15 is stopped by the bending arm 26f. The rotation is restricted in the middle, and only the reverse side pinch roller holding arm 14 rotates freely to the end, and the pinch roller 12 selectively rolls into contact with the capstan 3 through the tape, and the tape is driven and run in the reverse direction. Ru.

In addition, in the above-mentioned reverse stop mode, if you press the forward button 47 and the recording button 48 to perform a forward recording operation, the plunger 32 is activated (the plunger 38 is also activated), the mechanical mode storage mechanism is activated, and the forward recording mode is activated. It enters the recording state. That is, when the drive lever 31 is pulled in the direction of the arrow A by the operation of the plunger 32, the locking pin 36 is guided by another slope 21a _-2 of the memory rotation plate head 21a and moves. The end surface 21 _b-1 of the portion 21b is locked, and the rotating plate 21 is rotated counterclockwise. The rotating plate 21 is applied with a counterclockwise rotating force by the toggle spring 25, and reaches the position shown by the solid line in FIG. The sliding lever 26 moves in the direction of arrow A, and the recording/reproducing head 7 rotates half a turn as in the previous case. As a result, the storage mechanism is converted to a state in which the forward recording mode shown in FIG. 2 is stored.

Furthermore, in the above embodiment, two recording heads 7 are used.
Although a track head is prepared and rotated half a turn each time the mode is changed, it is also possible to install the track head fixedly as a four-track head and select two tracks at a time for forward recording and reverse recording.

Next, when the capstan drive system is a closed-loop dual capstan system as shown in Fig. 8, and the reciprocating tape recorder is set to the same recording mode as the previous recording mode after going through the stop mode, An embodiment configured to speed up the start-up of tape running will now be described. In FIG. 8, 50 is a capstan motor, 51 and 52 are capstans, and 53 is a belt. In this method, the capstan motor 50 is used in forward recording mode and reverse recording mode.
It is necessary to reverse the direction of rotation of the switch, and a changeover switch 54 is inserted and connected in the input circuit. Furthermore, a main switch 55 is inserted into the input circuit. In the case of a conventional tape recorder, the main switch 5 is turned off every time the tape recorder is placed in stop mode.
5 is opened to stop the capstan motor 50. Therefore, when the tape recorder is set to the recording mode next time, the start of rotation of the capstan is slow, resulting in the inconvenience that a smooth recording start operation cannot be performed.

Therefore, in this embodiment, the main switch 55 is configured to be closed when a cassette is attached, so that the main switch 55 is maintained in the closed state even when the tape recorder is in the stop mode. Further, the changeover switch 54 is configured to be changed over by a relay RL ₂ in FIG. Therefore, the capstan motor 50 continues to rotate in the direction of arrow F during the forward recording (playback) mode even in the stop mode, and continues to rotate in the direction of the arrow G even in the stop mode during the reverse recording (playback) mode. It stays still.

As a result, when the tape recorder is set again to the previous mode and the opposite mode, the tape immediately starts running normally without requiring time for the capstan motor 50 to start rotating.

As described above, according to the eraser in the reciprocating tape recorder according to the present invention, the forward recording mode storage mode or the reverse recording mode storage mode is set in response to the plunger operating corresponding to the forward recording mode or the reverse recording mode,
A switch for selectively connecting the bias oscillation circuit and the forward erasing head or the reverse erasing head is provided with a mechanical memory means that retains the mode even after the plunger is deenergized, and the mechanical memory means is used for forward recording. The switch is interlocked with the mechanical storage means so that it is connected to the forward erasing head when in the mode storage mode, and connected to the reverse erasing head when in the reverse recording mode storage mode. Because of the configuration, when a tape recorder that has been placed in stop mode is placed in the same recording mode as the previous recording mode, especially when placed in reverse recording mode again, the tape running system is activated without waiting for the switch to be switched. Therefore, it has the excellent feature that recording can be started at the same time as the operation without causing a delay in the start of recording and without leaving any unerased portions at the head of the tape.

[Brief explanation of the drawing]

1 to 4 are partially cutaway views showing the forward recording mode, forward stop, reverse recording mode, and reverse stop state of a reciprocating tape recorder to which the erasing device of the present invention is applied, respectively. 5 is a diagram showing the mechanism of the pinch roller portion, FIG. 6 is a diagram showing the main parts of the mode storage mechanism, and FIG. 7 is an erasing head that cooperates with the tape recorder shown in FIGS. 1 to 4. FIG. 8 is a diagram showing an example of a capstan drive system configured to cooperate with the electric circuit shown in FIG. 7. 1, 2... Reel shaft for cassette, 3, 4... Capstan, 5... Erase head for forward,
6... Reverse erasing head, 7... Recording/reproducing head, 8... Head board, 9... Gear, 10... Sector gear, 11... Vertical support plate, 12, 13...
Pinch roller, 14, 15... Pinch roller holding arm, 16... Chassis, 21... Memory rotating plate, 21a... Triangular head, 21 _a-1 , 21 _a-2 ...
...Slope, 21b, 21c...Left and right arm parts, 21d
... Leg, 22 ... Shaft, 23, 24, 28 ... Pin, 25 ... Torque spring, 26 ... Sliding lever,
26d... Long hole, 26e, 26f... Bent arm, 3
DESCRIPTION OF SYMBOLS 1... Drive lever, 32... Plunger for mode switching, 33... Rotating lever, 36... Locking pin, 37... Mode switching switch, 38... Plunger for moving the head board, 40-43... Switch , 44...stop button, 45...control circuit,
46...Oscillation circuit, 47...Forward button, 4
8...Record button, 49...Reverse button.

Claims (1)

[Claims] 1. In a reciprocating tape recorder capable of forward recording and reverse recording, the forward recording mode storage mode or reverse recording mode storage mode is activated in response to the plunger operating corresponding to the forward recording or reverse recording mode, and the plunger is turned off. A switch for selectively connecting the bias oscillation circuit and the forward erasing head or the reverse erasing head is provided so that the mechanical memory means maintains the mode even after recording. When the switch is in the forward erasing head side, the switch is connected to the forward erasing head side, and when in the reverse recording mode storage mode, the switch is connected to the reverse erasing head side. An erasing device for a reciprocating tape recorder, characterized by: