JPS5850498Y2 - tape recorder - Google Patents

Description

[Detailed description of the invention] This invention has a timer standby means that can automatically record and playback when the power is turned on, and a timer standby means that can stop the rotation of the take-up reel to make it convenient for editing the tape. The present invention relates to a tape recorder equipped with a means for running the tape at a constant speed and sending the tape out of the reel.

Conventionally, some tape recorders for business use are equipped with an edit button for convenient editing of tapes.

This edit button is used to prevent the take-up reel from rotating, and is locked in the pressed position.

When this edit button is pressed to lock it in that position and the play button is pressed to run the tape at a constant speed, the tape fed to the take-up reel by the capstan and pinch roller will be reeled without being taken up by the take-up reel. Since it can be taken out, the tape can be easily cut and spliced.

On the other hand, tape recorders equipped with timer standby means are often found in consumer tape recorders, and the timer start button on the tape recorder can be set, and the timer built into the tape recorder or an external timer can be set. When the predetermined time comes, the power is turned on to the tape recorder, and at the same time a tape constant speed running command, so-called play command, is output, and the tape is run at a constant speed so that playback and recording can be performed. ,
It's convenient.

However, if the above-mentioned editing function and timer standby function are provided simultaneously in one tape recorder,
The following drawbacks arise.

In other words, the timer start button is set, and when the predetermined time set in the timer arrives, the power is turned on and a play command is output at the same time, but at this time, the edit button is mistakenly set to the suppressed position, that is, the play command is output. If the tape is locked in position, the tape will run at a constant speed without the take-up reel taking up the tape, and the tape will automatically be fed out of the reel, preventing the tape from cluttering up outside the tape recorder. This causes the inconvenience of being scattered.

Therefore, the present invention aims to eliminate such drawbacks, and one embodiment thereof will be described below with reference to the drawings.

1 is a tape running command storage circuit, and 2 and 3 are a play switch and a recording switch, respectively.

The switches 2 and 3 are normally open push button switches, and when the play switch 2 is turned on, the input terminal 4 of the memory circuit 1 is set to a low level L, and a tape constant speed running (playback) command is issued to the switches 2 and 3. When both are turned on at the same time, both input terminals 4 and 5 become L, and recording and constant speed tape running commands are input.

When the L signal is input to the input terminal 4, the output terminal 6 of the memory circuit 1 outputs the tape constant speed running command, so-called play command, stored in the memory circuit 1 as a high level (B) signal. Drives the tape constant speed running drive circuit 7.

8.9 is a capacitor and a resistor that constitute a time constant circuit, and when the output terminal 10 of the memory circuit 1 does not reach the constant voltage 1o immediately after the power is turned on, the output terminal 11 of the memory circuit 1 is
An H signal is output to, and when the voltage at the terminal 10 reaches a constant voltage V1o or more after a certain time (tl) has elapsed, the level at the output terminal 11 changes to L.

The resistor 12 and diode 13 are for quickly discharging the charge stored in the capacitor 8 when Vcc drops to O due to the power being cut off.

Reference numeral 14 denotes a circuit that stops the rotation of the take-up reel during editing, and is driven when the output of the Nant gate 15 is L.

When the tape constant speed drive circuit 7 and the circuit 14 are driven together, the tape is run at a constant speed without being wound onto the take-up reel.

16 is a timer start switch, and when this switch 16 is on, when the output of the Nantes gate 17 is L, the level of input terminals 4 and 5 is always set to L through diodes 18 and 19 regardless of the states of switches 2 and 3. do.

The diodes ia and is are used to prevent the L signal from grounding the output of the Nantes gate 17 via the timer start switch 16 when the switches 2 and 3 are turned on, and to prevent the input terminals 4 and 5 from grounding.
This is to distinguish between the two.

Reference numeral 20 indicates an edit switch, and by pressing an edit button (not shown) to turn it on, the input terminal a of the Nant gate 17 and the input of the inverter 21 are set to L.

Note that the input terminals 4 and 5, the input of the Nant gate 17, the terminal a, and the input terminal of the inverter 21 are set to be at H level when turned off, that is, opened.

Further, the edit switch 20 is constituted by, for example, a button switch, and is locked in the on state.

The operation of the above embodiment will now be explained.

[Normal play operation]

Timer start switch 16, edit switch 2
0 are both turned off and the play switch 2 is turned on, an H signal is output to the output terminal 6 of the storage circuit 1, and the tape constant speed running drive circuit 7 is driven to enter the playback state.

If the recording switch 3 is pressed at the same time as the switch 2, the recording state is entered.

[Timer start operation]

If only the timer start switch 16 is turned on,
When the time set in a timer (not shown) arrives and the power is turned on to the terminal 22, etc., after the power is turned on, the terminal 11 becomes H for a time t1, the output of the gate 17 becomes L, and the input terminals 4 and 5 of the memory circuit 1 become The signal becomes L and recording starts.

To perform reproduction, only the input terminal 4 needs to be set to L.

[Edit operation]

Turn on edit switch 20 and press play switch 2
When turned on, the output terminal 6 of the memory circuit 1 becomes the H gate 1.
5 becomes L, the constant speed tape running drive circuit 7 and the take-up reel rotation blocking circuit 14 are both driven, and the tape is fed out of the reel by running at a constant speed without being wound onto the reel.

[When the power is turned on with both switches 16 and 20 kept in the on state] The level of the input terminal a of the gate 17 goes high, the output of the gate 17 becomes H, and the level of the input terminal 4.5 of the memory circuit 1 goes up. is held at H and recording/playback is not started.

As explained above, according to the tape recorder of the present invention, even if the edit button is mistakenly held in the operating position while the timer standby function is activated, the tape constant speed running command is not always output in this state. Since the tape does not run, the tape is not sent out of the reel and scattered, and safety can be sufficiently ensured.

[Brief explanation of drawings]

The drawing is a circuit diagram showing an embodiment of the present invention. 1... Tape running memory circuit, 2... Play switch, 3... Recording switch, 4, 5,
10... Input terminal, 6, 11... Output terminal, I... Tape constant speed running drive circuit, 14...
...Take-up reel rotation prevention circuit, 16... Timer start switch, 20...
・ ...Edit switch.

Claims (2)

[Scope of utility model registration request] (1) A timer standby means for automatically running the tape at a constant speed when the power is turned on, and an edit button for stopping the rotation of the take-up reel, and the timer standby means is provided when the edit button is held in the operating position. A tape recorder comprising means for stopping the tape from running at a constant speed by preventing the tape from running at a constant speed when the means is activated. (2) When the timer start switch constituting the timer standby means and the edit switch operated by the edit button are both in the on state, the level of the input terminal of the tape running command storage circuit is set to the tape running command signal level. The tape recorder according to claim 1, wherein the tape recorder is configured to maintain the output at a level that prevents the output from occurring.