JPH067441Y2 - Tape deck - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a two-head type tape deck having an editing function for recorded tapes.

"Prior Art" A conventional tape deck of this type is shown in FIG. In the drawing, A and B are reels, C is a tape, D is a capstan, and E is a pinch roller.

F is a recording / playback head (hereinafter abbreviated as recording / playback head)
Then, G is a reproduction amplifier, H is a flat amplifier, I is a Dolby unit, J is a recording amplifier, and K is a line-out terminal, and the reproduction state can be monitored.

L is an erasing head, M is a bias oscillator, and a recording bias is applied to the recording / reproducing head F and an erasing current is applied to the erasing head L.

S ₁ and S ₂ are switches that open and close in conjunction with each other depending on the purpose of recording, playback, and editing. S ₁ is closed during playback and opened during recording. Further, S ₂ operates in the opposite manner to S ₁ . Furthermore,
S ₃ is a switch that can be switched to the REC side during recording and to the PB side during playback. S ₄ is a switch for muting the recording amplifier J. S ₅ is a switch for operating and stopping the bias oscillator M.

Next, the operation of the above conventional example will be described.

As shown in FIG. 2, the recorded tape C (3) in which the music part II in which the music is recorded and the narration part III in which the narration is recorded are alternately recorded to the narration part II.
In the case of editing so as to erase only I, the reel B is run in the normal direction of the reel A to be in a reproduction state, and is listened to by the monitor, and the end portions a and c of the music portion II (that is, the start end of the narration portion III). When the recording passes through the gap of the recording / reproducing head F, the recording state is immediately changed to the narration section II.
I is erased by the erase head L. Then, when the narration section III reaches the end points b and d, the reproduction state is switched again.

However, in conventional editing, since switching between playback and recording depends on the feeling, when the start of the narration section III is heard on the monitor, the boundaries b and d between the narration section III and the music section II of the tape C have already been recorded and reproduced. The gap of the head F is reached, and therefore, even if the data is erased immediately, it cannot be erased until after the gap of the erase head L, and the narration portion III remains between both gaps. The remaining narration part III must be erased. At this time, whether or not the narration part III has ended depends on the feeling at all, so when the erasing is canceled early, it is rewound and erased again, or erased too long, and the music part is erased.
There was a drawback that the head of II was carelessly erased.

"Means for Solving Problems" The present invention has been made to solve the above problems, and even when the recorded tapes of the music section and the narration section are reversed and played. By utilizing the fact that both parts can be clearly discriminated, the time from the passage of the recording / playback head to the erasing head at the boundary between the music part and the narration part,
(EN) Provided is a tape deck in which an unnecessary portion of a recorded tape is erased by matching a delay of an operation time of applying a bias current to an erasing head by driving a bias oscillator by a manual operation.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 1 is a circuit configuration diagram of a tape deck according to the present invention, and FIG. 2 is an explanatory diagram showing recording contents of a tape.

In the above drawing, 1 and 2 are reels, 3 is tape,
4 is a capstan and 5 is a pinch roller.

6 is a recording / playback head (hereinafter referred to as a recording / playback head)
Reference numeral 7 is a reproducing amplifier, 8 is a flat amplifier, 9 is a Dolby unit, 10 is a recording amplifier, and 11 is a line-out terminal.

An erase head 12 and a bias oscillator 13 apply a recording bias to the recording / reproducing head 6 and an erase current to the erase head 12.

S ₁ and S ₂ are switches that open and close in conjunction with each other depending on the purpose of recording, playback, and editing. S ₁ is closed during playback and opened during recording. Further, S ₂ operates in the opposite manner to S ₁ . Furthermore,
S ₃ is a switch that can be switched to the REC side during recording. S ₄ is a switch for muting the recording amplifier 10. S ₅ is a switch for operating and stopping the bias oscillator 13. S ₆ is ON during recording and playback
This is a switch that is turned off when editing.

"Operation" Next, the operation of the above embodiment will be described. At the time of editing, as shown in FIG. 2, music section II and narration section III
The recorded tape 3 is reversely played in the reverse direction from the reel 1 to the reel 2. In this case, switch S ₁ is closed, S ₂ is opened, and recording / reproducing head 1 causes tape 3
The music part II and the narration part III are reproduced in the opposite directions, and 11 is monitored from the line-out terminal. Further, the switch S ₃ is switched to the PB side. Further, since the switch S ₆ is turned off, the bias current of the bias oscillator 13 is not applied to the recording / reproducing head 6.

As described above, when the tape is played in reverse, the recording / playback head 6
In the gap β portion of the above, it is possible to visually confirm on the monitor that the boundary α between the music portion II and the narration portion III recorded on the tape 3 passes, but when the switch S ₅ is pressed, the bias oscillator 13 is turned on. It operates and the erase current is applied to the erase head 12, so that the erase operation is started. Since there is a gap between the cap β of the recording / reproducing head 6 and the gap α of the erasing head 12, the switch S is detected after detecting that the boundary α of the tape 3 has passed through the gap β of the recording / reproducing head 6.
_{Even if 5} is pressed, the time from the sensing to the start of erasing can be sufficiently in time for the tape 3 to run from the gap β to α, and the erasing can be performed from the head of the narration portion III in a timely manner. Further, when the switch S ₅ is released after knowing that the rear end b of the narration portion II passes through the gap β of the recording / reproducing head 6, the rear end b described above is released at a proper timing by the gap α of the erase head 12. Since the erasing current is turned off around the time when the narration part III passes, there is no possibility of accidentally erasing the head of the music part II adjacent to the rearmost part b of the narration part III. When the above-described erasing operation is completed, the tape 3 is run in the normal direction (reproducing direction in the normal state), and the quality of the editing can be immediately confirmed. Further, in the embodiment, the switches S ₁ , S ₂ , S ₃ , S ₄ ,
Although mechanical switches are used for S ₅ and S ₆ , it goes without saying that they may be electronic switches using semiconductors.

[Advantage of Invention] The present invention is a two-head type tape deck having a recording / playback head and an erasing head as described above, and a recording / playback head and an erasing head are provided side by side in the forward rotation direction, and this recording / playback is performed. A switch for manually operating a bias oscillator that applies a bias current to the erasing head while performing reverse playback by running the recording / playback from the dual-purpose head side to the erasing head side while the recorded tape is in contact with the dual-purpose head and the erasing head. It is characterized by having means.

Therefore, even with a two-head type tape deck equipped with the recording / playback head 6 and the erasing head 12, it is possible to positionally erase the unnecessary portion accurately and in a short time. In addition, since the tape 3 is reproduced in the reverse direction at the time of editing, it can be used as a device having a game-like element such as title matching by reproducing music in addition to the editing work.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a tape deck according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the recorded contents of a tape, and FIG. 3 is a circuit configuration diagram of a conventional tape deck. 3 ... tape, 6 ... recording / playback head, 12 ... erasing head, 13 ... bias oscillator.

Claims (1)

[Scope of utility model registration request] 1. A recording head having a recording / playback head and an erasing head.
In a head type tape deck, a recording / playback head and an erasing head are provided together in the forward rotation direction, and the erasing head is used from the recording / playback head side with the recorded tape in contact with the recording / playback head and the erasing head. A tape deck provided with a switch means for manually operating a bias oscillator for applying a bias current to the erasing head while reversely traveling to the side for reverse reproduction.