KR890003605Y1 - Tape editing circuit in double deck tape recorder - Google Patents

Abstract

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Description

Tape editing circuit of double deck cassette

The accompanying drawings are circuit diagrams of the present invention.

* Explanation of symbols for main parts of the drawings

1: status part 2: control part

SW ₁ -SW ₂ : Leaf switch Q ₁ -Q ₈ : Transistor

R ₁ -R ₉ : Resistor C ₁ : Capacitor

SW ₃ : selector switch SW ₄ : dubbing switch

SW ₅ : recording / playback selection switch

According to the present invention, in a double deck cassette, when a dubbing is edited, any of the tapes in the two decks is ended first, and when the playback or recording function is stopped, the tape is automatically stopped at the same time with the other tape. It's about the editorial circuit.

In the conventional double deck cassette, when one of the tapes in the two decks simultaneously operating during dubbing editing is ended, the tape is lost because the other tape continues to record or play even if its operation is stopped. In addition to damage or damage, inefficient closure of the tape was generated.

The purpose of this paper is to solve the above drawbacks, and when one of the two tapes simultaneously operating during tape dubbing or editing is ended and the operation is stopped, the remaining tapes are automatically stopped. The configuration, operation and effects of the present invention will be described in detail by the accompanying drawings.

Monostable multi-stage transistors Q ₃ (Q ₄ ) at the bases of the normal motor driving transistors Q ₁ and Q ₂ and the A and B points of connection of each of the life switches SW ₁ and SW ₂ . ) And a transistor (Q ₇ ), a resistor (R ₃ ) (R ₆ ) and a state part (1) consisting of a delay capacitor (C ₁ ), and the transistor (Q ₃ ) (Q ₄ ) A transistor of which a base is connected to a symmetrical transistor Q ₅ (Q ₆ ) and a conventional dubbing switch SW ₁ connected to each base to control the transistor Q ₅ (Q ₆ ). Q ₈ ) and the resistor R ₅ (R ₈ ) constitute the control unit 2, and each emitter of the transistor Q ₅ (Q ₆ ) is connected to the above-mentioned A through the resistor R ₄ (R ₇ ). B ⁺ is the DC power supply terminal M ₁ , M ₂ is the driving motors R ₁ , R ₂ , R ₉ are the resistors, and SW ₃ is the continuous / simultaneous operation of the tape. switch, CP, DB is each point, the switch SW ₅ switch recording / re Selection switch, R, D is the angle of contact of the selection switch (SW _5).

First, in the continuous play mode, the selection switch SW ₅ is switched to the contact point P, and the switching switch S ₃ is turned to the contact point CP, whereby B ⁺ power is switched to each switch SW ₅ (SW ₃ ). Is supplied to the base of the transistor Q ₇ in the state section 1 to conduct the transistor Q ₇ . At this time, the life switch SW ₁ or the life switch SW ₂ is turned on by pressing the respective Play knobs in both decks. If the life switch SW ₁ is turned on first, the transistor Q _{1 is turned on.} ) is conductive Motor (even if M ₁₎ is driven soon as the transistor (Q ₄₎ in with a condition part (1) the base is a high level, and conduction is again turned on after Leif switch (SW ₂₎ in that case, transistor Since Q ₄ is turned on, transistor Q ₃ is turned off because its base is at a low level. In this state, when the tape operated by the motor M ₁ ends and the leaf switch SW ₁ is turned off, the transistor Q ₁ is turned off, thereby stopping the motor M ₁ while the transistor M ₁ is stopped. As (Q ₄ ) is turned off and the transistor Q ₄ is turned off, the transistor Q ₃ is conducted while the motor M ₂ is driven by the life switch SW ₂ in the on state. A continuous play mode is made in which the tapes in the play are played back in order.

On the other hand, if the switch SW ₂ is turned on first and the switch SW ₁ is turned on later, at this time, the transistor Q ₂ is turned on, and the motor M ₂ is driven. Transistor Q ₃ is turned on, and subsequent tape continuous operation is performed by the same circuit operation as described above.

On the other hand, when the regeneration knobs of the two decks are pressed at the same time and the respective leaf switches SW _{1 to} SW ₂ are turned on at the same time, the transistor Q ₄ is turned on as late as the charging time of the capacitor C ₁ in the state section 1. Therefore, the transistor Q ₃ is first conducted, the transistor Q ₁ is turned off, and the transistor Q ₂ is conducted so that the motor M ₂ is driven.

Second, in the dubbing editor, the selection switch SW ₅ is switched to the contact point R, and the switching switch SW ₃ is turned to the contact point DB, and the dubbing switch SW ₄ of the push locking type is turned on. It becomes

Accordingly, the transistor Q ₇ in the state portion 1 is turned off with its base open and turned off so that each transistor Q ₃ and Q ₄ is also turned off and thereby the transistor Q ₁ Q. ₂₎ is controlled only by the angle Leif switch (SW ₁₎ (SW _2), dubbing, editing each Leif switch (SW ₁₎ (SW ₂₎ that all of said transistors (Q _1), because the on state ( Q ₂ ) is all conducted so that motor M ₁ and M ₂ are driven simultaneously.

At this time, since the dubbing switch SW ₄ is turned on, the transistor Q _{8 in the} control unit 2 is turned on, but as described above, the transistors Q ₃ and Q ₄ in the state section 1 are turned off. Since the base of each transistor Q ₅ (Q ₆ ) is kept at a high level, the transistors Q ₅ (Q ₆ ) are all in an off state.

In this dubbing editing state, if the tape operated by the motor M ₁ is ended and the leaf switch SW ₁ is turned off, the motor M ₁ stops the operation. Since the base of the transistor Q ₆ in the high level state becomes low by the grounded resistor R ₈ , the transistor Q ₆ is turned on, whereby the potential at the point B is low level. Therefore, the transistor Q _{2 in the} conducting state is turned off, and the motor M ₂ also stops its operation.

On the other hand, Motor transistor (Q ₅₎ in the (M ₁₎ when the tape is ending the release operation by Leif switch (SW ₂₎ is off the Motor (M ₁₎ is to be stopped while the controller (2) By conduction by the resistor R ₅ , the potential at the point A becomes low, and the motor M ₁ also stops operating.

As described above, this paper is designed to automatically stop the operation of the other deck when the tape of one deck is ended and stopped during dubbing editing of the double deck cassette. It is a useful design that can be prevented as well as to facilitate the convenience of editing the tape.

Claims (1)

Monostable multistage transistors Q ₃ and Q at the points A and B, which are the connection points of the normal motor driving transistors Q ₁ and Q ₂ , and the angle switch SW ₁ and SW ₂ . ₄ ) and the state unit _{1 made} of the transistor Q ₇ , the resistor R ₃ , R ₆ and the delay condenser C ₁ , and the transistor Q ₃ Q _{4 described above.} The base is connected to a symmetrical transistor (Q ₅ ) (Q ₆ ) and the normal dubbing switch (SW ₁ ) and each base is connected to the base of the base) to control the transistor (Q ₅ ) (Q ₆ ) The control unit 2 is composed of a transistor Q ₈ and a resistor R ₅ and R ₈ , and each emitter of the transistors Q ₅ and Q _{6 is} connected to a resistor R ₄ and R ₇ . The tape editing circuit of the double-deck cassette, characterized in that configured to be connected to the points A and B, respectively, so that when the dubbing editing is stopped, the operation of the other deck is also stopped.