JPH0454572Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a magnetic recording medium having a so-called relay play mechanism, which is equipped with at least two mechanical parts capable of reproducing magnetic tapes, and causes the mechanical parts to perform reproducing operations in sequence. The present invention relates to a tape playback device.

[Technical background of the invention and its problems]

A conventional device of this type is shown in FIG. In the figure, 1 is a relay switch, 2, 3
is a play switch, and 4 is a control circuit, in which the relay switch 1 selects a relay mode, that is, a mode in which the regeneration operations of mechanical parts (not shown) are performed in order, and the play switch 2 selects the mechanical part corresponding to the switch. is put into play mode, and then the play switch 3 corresponding to another mechanism section puts that mechanism section into a relay play standby state, and when the mechanism section currently in play is stopped, it is brought into play mode.

In the above-mentioned conventional device, after selecting the relay mode and putting one mechanism section into the play state, it is sometimes forgotten to put the other mechanism section into the standby state, which poses a problem in operability.

[Purpose of invention]

This invention was developed to solve the above-mentioned conventional problems, and by giving a display warning until the mode is set to a state in which relay play can be performed, it is possible to avoid forgetting to set the relay play mode. The object of the present invention is to provide a magnetic tape playback device that prevents the above problems.

[Summary of the idea]

In a magnetic tape playback device that is equipped with at least two mechanical units capable of playing back magnetic tapes and has a relay play function that causes the mechanical units to perform playback operations in sequence, when a predetermined relay play operation is not performed in relay mode. The display warns you if you forget to perform an operation.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings, in which the same parts as those in the apparatus described above with reference to FIG. 4 are given the same reference numerals.

FIG. 1 is a circuit diagram showing an example of a magnetic tape playback device according to the present invention, and in the figure, the control circuit 4 is
It is composed of an MPU (microprocessing unit). The MPU consists of a ROM that stores the programs necessary for its operation, a RAM that temporarily stores processing data, and an arithmetic processing unit (AU) that makes decisions. Connected to the input of the control circuit 4 are a relay switch 1 that operates a push lock and a push lock release, a play switch ₂ and ₃ that operates momentarily, and mechanical units M ₁ and M ₂ . status signals are input.

The output of the control circuit 4 includes play indicators I ₁ , which are provided corresponding to the mechanical parts M ₁ , M ₂ , respectively.
The bases of transistors Q ₁ and Q ₂ that drive I ₂ are connected via resistors R ₁ and R ₂ . The indicators I ₁ and I ₂ each consist of an LED, and their anodes are connected to +B via current limiting resistors R ₃ and R ₄ , and their cathodes are connected to the collectors of transistors Q ₁ and Q ₂ , respectively. The emitters of transistors Q ₁ and Q ₂ are connected to ground and are connected to pull-down resistors.
It is connected to the output of the control circuit 4 via R ₅ and R ₆ .

The operation of the device configured as described above will be explained below.
A second diagram showing the operation of M ₁ , M ₂ and indicators I ₁ , I ₂
This will be explained with reference to FIG. 3 which shows a flowchart of the programming operation of the control circuit 4.

Now, for example, when the power of the device is turned on, the control circuit 4 starts its work, and in its first step S1, its outputs O ₁ and O ₂ are set to L level, and as a result, the transistors Q ₁ and Q ₂ are both turned off, and the indicators I ₁ and I ₂ are turned off. next,
In step S2, it is determined whether relay switch 1 is on or not, and the result of the determination is NO.
If so, return to step S1 and repeat steps S1 and S2 until the determination becomes YES.

When the determination in step S2 is YES, in the following step S3, the outputs O ₁ and O ₂ are alternately switched to H and L levels, and as a result, the transistors Q ₁ and Q ₂ are turned on and off, and the indicator I ₁ is turned on and off. ,I ₂
is flashing. After that, in step S4,
It is determined whether or not play switch 2 has been turned on. If the determination is NO, the process proceeds to step S5, where it is determined whether or not play switch 3 has been turned on. If the determination at step S5 is NO, the process advances to step S6, where it is determined whether or not the mechanism section _M1 is stopped. Now, since the judgment in step S6 is YES, the process proceeds to step S7, where the held state of play switch 2 is released, and then the process proceeds to step S8, where the output _O1 is set to H,
After alternately switching to the L level, the process returns to step S2.
The above steps S2 to S8 are repeated until the determination in step S4 or S5 becomes YES.

Now, if the determination in step S4 is YES, the process proceeds to step S9, where the state of play switch 2 is maintained, and then step
In S10, the output _O1 is set to L level, and as a result, the transistor _Q1 is turned on and the indicator _I1 is lit. Then, in the following step S11, the mechanism section _M1 is put into a play state.

After step S11, the process returns to step S5, where it is determined whether or not the play switch 3 has been turned on. If the determination at step S5 is NO, the process proceeds to step S6, where the mechanism section _M1 is stopped. A determination is made as to whether or not this is the case. Now this step S6
Since the determination is NO, the process returns to step S4, and steps S4, S9 to S11, and so on are performed until step S4 becomes NO or the determination in step S5 or S6 becomes YES.
S5 and S6 are executed repeatedly.

Now, when the play switch 3 is turned on while the mechanism section _M1 is in play operation, the judgment at step S5 becomes YES, and the process proceeds to step S12, where the state of the switch 3 is maintained and the play switch 3 enters the standby state. Thereafter, the process proceeds to step S13, where the output _O2 is set to L level, the transistor _Q2 is turned off, and the indicator _I2 is turned off from blinking. In the following step S14, it is determined whether or not the mechanical part _M1 has stopped.
Repeat steps S4, S9 to S11, until YES becomes YES.
S5, S12, and S13 are repeated.

Then, if the determination in step S14 is YES,
The process advances to step S15, where the holding state of switch 2 is released, and in the following step S16, the output _O1 is alternately switched between H and L levels. As a result, the transistor _Q1 is turned on and off, and the indicator _I1 begins to blink. Thereafter, in step S16', the output _O2 is set to H level, and in the next step S17, the mechanism section _M2 is set to the play state.

After the above step S17, proceed to step S18,
Here, it is determined whether or not the mechanism part _M2 has stopped,
If this determination is NO, the process advances to step S19 and it is determined whether the play switch 2 has been turned on. If the determination in step S19 is NO, the process returns to step S18, and steps S18 and S19 are repeated until the play switch 2 is turned on during the play operation of the mechanism section _M2 or until the operation of the mechanism section _M2 stops. .
Switch 2 is turned on and the judgment in step S19 is YES
Then, the process advances to step S20, where the output _O1 is set to H level, the transistor _Q1 is turned on, and the indicator _I1 is turned on.

Mechanism M stops and the determination in step S18 is completed.
If YES, proceed to step S21, release the holding of switch 3, and output in the following step S2.
After switching O ₂ to H and L levels alternately, step
Proceed to S23. At step S23, relay switch 1
It is determined whether the is on or not, and the determination is made.
If the determination is YES, the process returns to step S4, and if the determination is NO, the process returns to step S1.

To summarize the above, when the relay mode is selected by the relay switch 1, the output of the control circuit 4
Transistors Q ₁ and Q ₂ are turned on and off by O ₁ and O ₂ , and indicators I ₁ and I ₂ blink, respectively.
Indicates relay mode. Next, when one mechanism part _M1 is put into the play state by turning on the play switch 2, the corresponding indicator
The indicator I ₁ is changed from flashing to lit, and the other indicator I ₂ continues to flash, indicating that the mechanical part M ₂ is not ready for relay operation.

Then, switch the play switch 3 of the other mechanism section _M2 .
When turned on, the indicator _I2 changes from flashing to extinguished and the warning is cleared.

In the above conditions, the mechanical part during play operation
When M ₁ stops, the other mechanism section M ₂ starts the play operation, and the indicator I ₂ changes from extinguished to lit, indicating that the mechanism section M ₂ is in the play operation.

By the way, if the play switch 2 is not turned on again at this time, the indicator _I1 will continue to blink, indicating that the relay is not ready for operation. The above operation continues until the relay switch 1 is released from the on state.

In addition, in order to independently indicate the relay mode, an indicator _I3 and its driving transistor _Q3 can be added as shown by the dotted line in FIG. Further, the indicators I ₁ and I ₂ can also be used as play or pause indicators.

[Effect of idea]

As explained above, according to the present invention, after the relay mode is set, a warning is given on the display until the relay play operation is possible, thereby preventing forgetting the operation for the relay play operation. You will be able to do this.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the device according to the present invention, FIG. 2 is an explanatory diagram showing the operation of the device in FIG. 1, and FIG. 3 is a flowchart showing the operation of the control circuit in FIG. 1. 1 and 4 are diagrams showing examples of conventional devices. 1...Relay switch, 2, 3...Place switch, 4...Control circuit, _I1 , _I2 ...Indicator, _M1 , _M2 ...Mechanism section.

Claims (1)

[Claims for Utility Model Registration] A magnetic tape playback device comprising at least two mechanical parts capable of playing magnetic tape, and having a relay play mechanism for sequentially performing the playback operations of the mechanical parts, wherein a relay function mode is selected. a play operation selection operation member provided corresponding to each mechanism section; an indicator means provided corresponding to each mechanism section; 1. A magnetic tape reproducing apparatus comprising: a control means for causing the indicator means corresponding to a mechanical section of the selection operation member that is not operated to display a display.