JPS5841568B2 - Kirokusai Seisouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tape recorder or the like in which the tape running direction is determined by an operation switch for determining the tape running direction, and the tape running direction is automatically reversed by an end detection device. The present invention relates to a recording/reproducing device.

In tape recorders having the above-mentioned functions, three modes are generally selectable: normal recording/playback operation, repeat operation, and reverse operation.

Among these, the conventional function for reverse operation is only capable of starting from the forward direction, reversing the tape running direction using an end detection device at the end of the tape, running the tape in the backward direction, and stopping at the end of the tape. It was not possible to run the tape in the forward direction after starting from the word direction and reversing the tape, and at the end of the tape in the bank word direction, the tape only stopped running and could not be reversed.

In other words, with a conventional tape recorder, for example, if you want to start playback from backward information on the tape and end it with forward playback after reversal, or if you start recording information on a track in the backward direction and want to end the playback after reversal, If you want to continue recording information on a track in the forward direction, tape the tape so that the end of the tape for reverse operation is the end of the tape in the forward direction, that is, the backward track runs in the forward direction. This required rewinding and fast forwarding.

The present invention has been made in order to correct the above-mentioned drawbacks.In a recording/reproducing apparatus such as an auto-reverse type tape recorder, the present invention starts in an arbitrary direction and reverses to the other direction at the end of the tape. This also enables reverse operation from the bank word direction to the forward direction.

An example in which the present invention is implemented in a tape recorder will be described below with reference to the drawings.

FIG. 1 is a diagram showing the principle of a conventional general auto-reverse function.

In Fig. 1, 81 is a mode selection switch, which is used for repeat operation, reverse operation, and normal operation.
EPEAT, REV.

It has eight OFF terminals, and F for the forward direction.
It has two circuits, a WD and a BWD for backward direction, which are interlocked with each other.

S2. S3 is a switch that is turned ON by the detection output of a tape end detection device based on, for example, base sensing, tape counter, presence or absence of tape magnetic material, light transmission of leader tape, etc. S2 is for forward direction, and S2 is for bank word direction. are controlled by the respective detection devices.

S4. S is an operation switch for determining the tape running direction.
The backward direction can be selected by 4, and the forward direction can be selected by S and flip-flops F and F, which will be described later.
determine the state of

In addition, switch S4. S has a structure in which it is connected to flip-flops F and F only during operation.

F, F are RSS flip Flora circuits, and the above switch 8
The state is determined by the combination of 1 to S, and the output controls the forward and reverse rotation of the reel motor or cap stun motor.

This set terminal S is connected to a forward direction operation switch S5 and a bank word direction termination detection switch S3 via a switch S1.

The reset terminal R is connected to the backward operation switch S4, the forward direction termination detection switch S2, and the switch S1.
Flip-flops F and F operate when zero potential is applied to terminals R and S, respectively, which are connected through.

That is, when the flip-flops F and F are in the "SET" state, the tape runs in the forward direction and the "RBSET" state is reached.
'', the vehicle is configured to travel in the bank word direction.

In the above configuration, the mode selection switch S1 is set to REV
I will explain the case when I choose .

Press the operation switch S to set the flip-flops F and F to “S”.
ET'' state, the tape runs in the forward direction, and when it reaches the end of the tape, the aforementioned end detection switch S2 operates, flip-flops F and F are reset, and the tape reverses and runs in the bankword direction. Start.

Next, if you continue traveling in the backward direction, or if you turn on the operation switch S4 to start traveling in the bankward direction, the end detection switch S3 will operate at the end of the tape, but the selection switch Since it is blocked by S1, flip-flops F, F cannot be inverted.

Here, if the BWD side REV terminal of the selection switch S1 is connected to the termination detection switch S3, reverse running is possible even in this case, but that is nothing but a repeat operation and not a reverse operation.

Therefore, with this configuration, as long as the selection switch S1 is in REV, reverse operation is not possible at the end of the tape in the bank word direction.

Next, the principle of the O1-IJ-verse function according to the present invention will be explained with reference to FIG. 2, in which elements having the same functions as in FIG. 1 are denoted by the same symbols.

In FIG. 2, S6. S7 is a switch added according to the present invention, and when the operation of the operation switch S5 is completed, the operation switch S5 returns to the flip-flop F state.

Although the connection with F is cut off, the switch S6 remains in the "'ON" state.

Further, the switch S7 also has the same relationship with the operation switch S4 as the above-mentioned switch S6 versus switch S.

With the above configuration, when the flip-flops F and F are set by the operation switch S5 and traveling is started in the forward direction, the switch S6 is held "ON", so at the end of the tape, the end detection switch S2 is turned "ON". “
Therefore, the flip-flops F and F are reversed and run in the backward direction.

At the end of the tape in the backward direction, the end detection switch S3 is "ON", but the switch S7 is "OFF", so the flip-flops F and F are not inverted, and therefore, the reverse operation when the tape starts running in the forward direction is Complete.

Next, flip-flop F is activated by operation switch S4.

When F is reset and travel is started in the bank word direction, the switch S7 is held at "ON" this time, so at the end of the tape, the end detection switch S3 is turned "O".
N” and flip-flop F.

F is reversed and runs in the reverse direction in the forward direction.

At the end of the tape in the forward direction, the end detection switch S is "ON", but since the switch S6 is "OFF",
Flip-flops F, F are not inverted.

Therefore, the reverse operation when starting traveling in the backward direction is completed.

That is, a reverse operation that starts in the forward direction and ends in the backward direction and a reverse operation that starts in the bankword direction and ends in the forward direction are possible.

Next, FIG. 3 will be explained.

FIG. 3 is a connection diagram showing the main parts of a tape recorder embodying the present invention. Elements having the same functions as those in FIGS. 1 and 2 include:
The same symbol is a sign.

Flip-flops F and F are resistors R2, R3, R,, R6
, transistor Q2. It is composed of Q3.

Resistor R1, together with capacitor C1, differentiates the signal from operation switch S4 and applies it to the collector of transistor Q2.
Invert flip-flops F and F.

Resistor R4, together with capacitor C2, differentiates the signal from operation switch S, and adds it to the collector of transistor Q3.
flip flop F.

Flip F.

Resistors R7 to R0 are for biasing transistors Q5JQ6, and a negative voltage is applied to terminal 1 during rewinding and fast forwarding, and transistors Q5. Q6 is turned "OFF" and the tape end detection switch S2. Even if S3 is activated, it is possible to prevent a malfunction in which the flip-flops F and F are reversed.

Switch S2. S3 employs a foil sensing method as a termination detection means, and here serves as a sensing pole.

Relays RL1 to RL4 are control relays, and RL
l is in charge of reel motor torque control, RL2 is in charge of capstan motor forward/reverse rotation, RL3 is in charge of head rotation, and RL4 is in charge of pause, and all switch transistors Q, , Q4. Q7
．． Q, , lead to the base of Q9, these “ON”
, is activated by "OFF".

Resistor R10J R11 is transistor Q7-Qg,
The Qo bias switch S8 is a two-circuit switch that is linked to the rotation of the head, and selects the FWD terminal when the head is in the forward position, and selects the BWD terminal when the head is in the bank word position.

The operation of the above configuration will be explained.

When the forward operation switch S5 is turned "ON", if the transistor Q2 is "OFF", it remains as is, and if the transistor Q3 is "OFF", the flip-flop F
.

F is inverted and the transistor Q2 is turned "OFF". At this time, the outputs of the flip-flops F and F turn the transistor Q1 "ON" and the transistor Q2 "OFF".

RL1 connected to transistor Q1 is in the "ON" switch position to control the torque of the reel motor.

Also, RL2 connected to transistor Q2 is “OFF”
state switch position and rotate the capstan motor in the forward direction.

The outputs of flip-flops F, F are selected by switch S8 and also applied to the base of transistor Q7.

When transistor Q7 becomes "ON", transistors Q and Q become "ON".

As a result, RL3 and RL are set to the "ON" switch position, and are in a state of waiting for the head rotation operation and pause operation, respectively.

As explained in FIG. 2, when the end of the tape is reached in the forward direction, the switch S6 remains held, so when the end detection switch S2 is turned "ON" by the sensing base, the collector of the transistor Q2 becomes zero. It goes down to the potential and inverts the flip-flops F and F.

Relays RL1 to RL4 are controlled by the outputs of flip-flops F and F, so relay RL4 rotates the head to the backward position, relay RL switches the reel motor torque, and relay RL2 reverses the capstan motor. let

In other words, the reverse operation is completed.

The same applies to the case where the vehicle starts traveling in the bankward direction, and since the main part has been explained in FIG. 2, it will be omitted here.

In the above explanation, the case was described in which the tracks in the forward direction and the backward direction are switched by rotating the head, but the method of switching the connection between a head dedicated to the forward direction and a head dedicated to the backward direction during reverse is also used. However, no inconvenience will occur.

The present invention provides a switch S4, for example, for selecting the running direction of a recording medium such as a magnetic tape. forward direction selection means and backward direction selection means such as S, bistable means such as a flip-flop that is operated by these two selection means and maintains its state, and the drive system of the recording medium and The recording and reproducing system, that is, a capstan motor, a magnetic head, etc., is provided with a setting means such as a relay for setting the forward direction or the backward direction, and a forward direction end detection means and a backward direction end detection means of the recording medium, and the above-mentioned When the forward direction selection means is selected, the bistable means is switched by the forward direction end detection means, and the bistable means is prevented from being switched by the backward direction end detection means, When the backward direction selection means is selected, the bistable means is switched by the backward direction end detection means, and the bistable means is prevented from being switched by the forward direction end detection means. The present invention relates to a recording/reproducing device characterized by the following.

Therefore, according to the present invention, it is possible to start traveling in any direction and end it in the other direction, that is, to start traveling in the forward direction and end it in the backward direction, and to start traveling in the backward direction and end it in the forward direction. It becomes possible to perform both the reverse operation and the reverse operation to be completed.

Since the reverse operation according to the present invention is performed only once, it is suitable for use in a case where, for example, an answering tape recorder is used to perform an answering recording.

[Brief explanation of the drawings] Fig. 1 is a principle diagram of a conventional general O1-IJ berth function, Fig. 2 is a principle diagram of an auto reverse function according to the present invention, and Fig. 3 is a principle diagram of an auto reverse function according to the present invention. FIG. 2 is a connection diagram showing main parts of a tape recorder. F, F are control RS flip-flops, Sl is a reverse mode selection switch, S2 is an FWD termination detection switch, S3 is a BWD termination detection switch, S4 is a BWD operation switch, S is an FWD operation switch, and S6 is a switch. A switch held by S, S7 is a switch held by S.
Switch held by 4.

Claims (1)

[Claims] 1. A forward direction selection means and a backward direction selection means for selecting the running direction of the recording medium, a bistable means operated by these two selection means and maintained in that state, and a drive of the recording medium by the bistable means. a setting means for setting the system and the recording/reproducing system in the forward direction or the backward direction, a forward direction end detection means and a backward direction end detection means of the recording medium, and when the forward direction selection means is selected, The bistable means is switched by the forward direction end detection means, and the bistable means is prevented from being switched by the backward direction end detection means, and when the backward direction selection means is selected, A recording/reproducing apparatus, characterized in that the bistable means is switched by the backward end detection means, and the bistable means is prevented from being switched by the forward end detection means.