JPS60242534A - Control circuit for repetitive reproducing of cassette tape player - Google Patents

Abstract

PURPOSE:To reproduce a desired recording section repeatedly by single switch operation by sending commands for head locating reproduction and a fast feed direction to an operation control circuit through the operation of a reproduction command switch. CONSTITUTION:A signal FWD from a terminal is at H and a transistor Tr 8 is on in forward reproduction mode. When the repetitive reproduction switch 24 is turned on in this state, both Trs 8 and 9 turn on and a Tr 10 also turns on to input a rewind command to an input terminal RWD of a microcomputer 25 through a terminal 4. Further, the program search command of repetitive reproduction is inputted to an input terminal APS of the microcomputer 25 through a terminal 7. When the switch 24 is turned on in reverse reproduction mode, the tape runs fast in the forward direction and a sound recording section to be reproduced repeatedly is head-located for automatically and reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a repeat playback control circuit suitable for use in a cassette tape player, particularly a vehicle-mounted cassette tape player.

[Background of the invention]

Generally, when the playback of a certain recording section among the plurality of recording sections of a cassette tape (for example, the plurality of V-recorded tracks on a Me-Sick tape) ends, if you want to repeat the playback and listening to that recording section again, the cassette tape It is necessary to rewind the data at high speed to the starting position of the recording section and then play it back. In particular, if the cassette tape player is of a type that can perform bidirectional playback, 7-oward playback and reverse playback, in order to rewind for the above-mentioned repeat playback, the cassette tape must be reversed during forward playback. When playing in reverse direction, the vehicle must be run at high speed in the forward direction. (Hereinafter, in order to distinguish between high-speed running in the forward direction and high-speed running in the reverse direction, the former will be referred to as "fast forward" and the latter as "rewind.") In a cassette tape player equipped with a playback mechanism, fast-forwarding or rewinding (cueing) to the start position of a desired recording section and the start of playback from that start position are now automatically performed. Therefore, the above-mentioned repeated reproduction can be performed relatively easily. However, the operation for this purpose is still not fully standardized. In other words, in the configuration of a conventional cassette tape player with a cue playback mechanism, when attempting to repeatedly play back a desired recording section, the cue playback command switch is first operated, and the cassette tape necessary for cueing is activated. After confirming the high-speed feed direction, it was necessary to selectively operate the fast-forward or rewind operation switch, and also operate the selection switch for selecting the number (address) of the desired recording section. Such complicated operations are not only troublesome, but also because, especially when the cassette tape player is installed in a car, the operator generally performs the operations while driving the car. , the driver's attention was lost, which was extremely dangerous @ [Object of the Invention] The object of the present invention is to eliminate the drawbacks of the above-mentioned prior art and to re-read the desired recording classification of a cassette tape by operating a single switch. [Summary of the Invention] To achieve this object, the present invention provides a repeat playback command switch that can be operated at any desired time. This instructs the operation mode control circuit of the cassette tape player to play the beginning of a recording section to be repeatedly played, and also causes the cassette tape to move at high speed in the forward or reverse direction (fast forward or By simply operating the repeat playback command switch, both forward and reverse playback of the cassette tape can be performed.
The present invention is characterized in that the desired recording section can be repeatedly reproduced.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings. The figure is a block diagram showing an embodiment of a repeat playback control circuit according to the present invention, and in the figure, 25 constitutes an operation mode control circuit of a cassette tape player. As is well known, the system microcomputer 25 is configured to be able to control various operating modes of a cassette tape player, such as forward playback, reverse playback, and cue playback of a desired recording section. do.

1 is a terminal to which the system microcomputer 25 inputs a signal that becomes high level when the cassette tape player is in the 7-word playback mode (hereinafter referred to as the FWD signal), and 2 is a terminal to which the cassette tape player is similarly set to the reverse playback mode. This is a terminal to which a signal (hereinafter referred to as the REV signal) that becomes 71-level at some point is input. 3～
Reference numeral 7 denotes connection terminals, and as shown in the figure, these are the power supply terminal B1 of the system microcomputer 25, rewind command input terminal REV, fast forward command input terminal FF, ground terminal E,
It is connected to a cue command input terminal AP8 for repeated playback. 8 to 13 are switching transistors, 14
~21 are switching transistors 9°10.12.
1!1 is a bias resistor, 22.23 is a flip-flop resistor of the switching transistor 8.11, and 24 is a repeat playback command switch, which are connected as shown in the figure to form a repeat playback control circuit. The operation of the embodiment will be explained. If the cassette tape player is currently in the 7t word playback mode, the FWD signal input from terminal 1 is at a high level, and the transistor 8 has a high level FW signal at its base.
The D signal is supplied and the switch is in a state where it can be turned on. In this state, playback of a certain recording section of the cassette tape has finished, and if you want to repeat the playback of this recording section again,
When the repeater turns on the repeat play command switch 24,
Transistor φ is given a forward base bias,
Transistors 8 and 9 are both turned on. As a result, the forward bias voltage is supplied to the base of the transistor 10 and the transistor 10 is turned on, and as a result, a rewind command is inputted to the input terminal RBW of the system microcomputer 25 via the connection terminal 4. At the same time, by turning on the repeat play command switch 24, a cue command for repeat playback is input to the input terminal APS of the system microcomputer 25 via the connection terminal 7.Based on this cue command, The system microcomputer 25 sets the operation mode of the tape player so that the playback operation for the recording section that has currently finished playing is performed again, and also sets the tape player's operation mode as necessary in this case based on the above-mentioned rewind command input. The direction is determined, the cassette tape is rewound at high speed to the starting position of the recording section, and the playback is automatically repeated from that position.Meanwhile, if the cassette tape player is in reverse playback mode, the above-mentioned Since the RFiV signal from terminal 2 is at a high level instead of the FWD signal, in this case, when the repeat playback command switch 24 is turned on, transistors 11 and 12 are turned on, which turns on transistor 13. Therefore, the system microcontroller 25 has
Instead of the rewind command from the terminal REW, a fast forward command is input from the terminal FF. When the repeat playback command switch 24 is turned on, the terminal AP is sent to the system microcomputer 25.
Inputting the cue command for repeat playback from 8 means that
This is the same as in the case of forward playback. therefore,
During reverse playback, when the repeat playback command switch 24 is turned on, the cassette tape runs at high speed in the tape running direction required in this case, that is, in the fast forward direction, and the recording section to be played repeatedly is automatically cued up and played back. You will be killed.

In addition, the system microcomputer 2 required to perform the above operations
5, the means for supplying the FWD signal and the IFLEV signal, the means for detecting the start position of each recording section of the cassette tape, etc., can be appropriately used as those well known to those skilled in the art, so a detailed explanation thereof will be omitted. The configuration of the switching circuit made up of the transistors 8 to 13, etc. described above merely shows one embodiment of the present invention, and the point is that the cassette tape is repeatedly operated depending on whether the cassette tape is in the forward playback mode or the reverse playback mode. Any device may be used as long as it can selectively switch and output different commands when operating the reproduction command switch, and it goes without saying that various modifications other than the above-mentioned embodiment are possible [Effects of the Invention] As explained above. According to the present invention, a desired recording section of a cassette tape can be repeatedly played by a single switch operation, and the operation can be simplified, so that a cassette tape player can be installed in a car. The present invention provides a repeat playback control circuit in a cassette tape player which has excellent functions, except for the drawbacks of the above-mentioned conventional technology, and enables easy repeat playback of a desired recording section without compromising driving safety. can provide 0

[Brief explanation of drawings]

The figure is a block diagram showing an embodiment of a repeat playback control circuit according to the present invention. 1...FWD (forward playback mode) signal input terminal, 2...REV (reverse playback mode) signal input terminal, 8-13...switching transistor, 24...
Repeat playback command switch, 25...operation mode control circuit (system microcomputer),
REW...Rewind command input terminal, FF...Fast forward command input terminal, APS...Cueing command input terminal for repeat playback Patent attorney Akio Takahashi

Claims (1)

[Claims] In a cassette tape player that is capable of forward playback and reverse playback and has a playback function that locates the beginning of a desired recording section, a repeat playback command switch and an operation mode control circuit of the cassette tape player are provided with a repeat playback command switch. A circuit is provided for commanding the cue playback of the recording section to be searched, as well as for commanding the high-speed feeding direction of the cassette tape in the forward or reverse direction necessary for cueing, and by simply operating the repeat playback command switch. During both forward and reverse playback of a cassette tape, select the desired recording category.