JPS63222358A - Auto-reverse type cassette player - Google Patents

Abstract

PURPOSE:To reverse the tape running direction and to search a program of music with one operation to improve the operability by rewinding or fast for warding a tape with depression of play/program switch and setting the play mode after searching the program. CONSTITUTION:If a play/program switch 17 is depressed when the tape is transported in the normal direction to perform reproducing, a main control part 18 instructs a tape running control part 16 to invert the tape running direction and switches a head changeover switch 13. An inter-music part detecting circuit 15 monitors the level of the audio signal read from the head to identify the middle part of the program of music or the inter-music part just after inversion. If the middle part of the program of music is identified, the control part 18 rewinds or fast forwards the tape through the control part 16 to search the start of the program and continues reproducing. Thus, inversion and program search are performed with one operation to improve, the operability.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Applications> The present invention relates to an auto-reverse type cassette tape player 9, and more particularly to an auto-reverse type tape player equipped with a switch for reversing the tape running direction during play.

<Prior Art> Some auto-reverse type cassette tape players are equipped with a switch (referred to as a play/program switch) for reversing the running direction of the tape during play. In such an auto-reverse type cassette tape player, if the play/program switch is pressed while the tape is running in a predetermined direction and being played back (during play), the tape running direction is reversed and playback continues. do.

<Problem to be solved by the invention> By the way, when the tape running direction is reversed and played back by suppressing the play/program switch, the performance often starts from the middle of the song, so the operator has to continue rewinding or fast forwarding. to find the beginning of the song, and then play it from the beginning of the next page.

However, with this method, two operations are required to suppress the play/program switch and the switch to start the song, and furthermore, it is necessary to judge whether the song is in the middle or not, making the operation cumbersome. Ta. Particularly in the case of in-vehicle devices, the driver often operates the device, and if the number of operations increases, it is not favorable for safe driving.

In view of the above, an object of the present invention is to provide an auto-reversing cassette tape player □ that can reverse the play direction with a single operation and can always play back a song from the beginning.

<Means for Solving the Problems> FIG. 1 is a block diagram of an onitori reverse type cassette tape player that implements the present invention.

11 is the normal side head, 12 is the reverse side head, 1
3 is a head changeover switch, 15 is a song interval detection circuit, 16 is a tape running control section, 17 is a play/program switch, and 18 is a main control section.

During play, for example, when the tape is being fed in the normal direction for playback, when the play/program switch 17 is pressed, the main control section 18 controls the tape running control section 1.
6 to reverse the tape running direction, the head changeover switch 13 is turned on to switch the head to the reverse head 12, and the audio signal read from the head is input to the song interval detection circuit 15 via the preamplifier 14.

The song interval detection circuit 15 monitors the level of the input audio signal and determines whether the moment immediately after reversing the play direction is in the middle of the song (during the song).
, or between songs, and the main control unit 18 continues the play state if it is between songs, and if it is in the middle of a song, the tape running control unit 16 advances the tape by rewinding or fast forwarding. to find the beginning of the song, and then start playback.

<Example> Figure 1 shows an auto-reverse cassette that realizes the present invention!・
FIG. 2 is a block diagram of a tape player.

11 is a normal R4 head that reads audio signals from the normal track when the tape is running in the normal direction, 12 is a reverse side head that reads audio signals from the reverse track when the tape is running in the reverse direction, and 13 is the normal head. 14 is a preamplifier that amplifies the audio signal read by the head; 15 is a song interval detection circuit; When it is below the level, it is regarded as an inter-song period and an inter-song signal MIT is output. 16 is a tape running control unit that controls the running of the tape; 17 is a playback unit that reverses the tape running direction during play and continues playback;
A program switch 18 is a control section composed of a microcomputer. If the play/program switch 17 is pressed while stopped, the play state will be in the normal direction, and if it is pressed during fast forwarding or rewinding, the play state will be in the normal direction or in the reverse direction, respectively.

The overall operation of FIG. 1 will be described below with reference to the flowchart shown in FIG.

When the play/program switch 17 is pressed (step 101), the main control unit 18 checks whether it is currently in the play state (step 102).

If it is not in the play state, the main control unit 18 puts it into the play state (step 1θ3). For example, if the play/program switch 17 is pressed and the tape is stopped or fast forwarded, the main control section 18 causes the tape travel control section 16 to move the tape in the normal direction at the playback speed, and also causes the head changeover switch 13 to move in the normal direction. and normal side head 11
The audio signal read by the preamplifier 14 is input to a reproduction circuit (not shown). However, if rewinding is in progress when the play/program switch 17 is pressed, the main control section 18 causes the tape travel control section 16 to move the tape in the reverse direction at the playback speed, and also causes the head changeover switch 13 to move the tape into reverse direction. The audio signal read by the side head 12 is input to a reproduction circuit via a preamplifier 14.

On the other hand, if it is in the play state when the play/program switch 17 is depressed, it is determined as "rYES" in step 102. As a result, the main control section 18 causes the tape running control section 16 to reverse the tape running direction, and also causes the head changeover switch 13 to switch the head, and sends the audio signal read from the head through the preamplifier 14 to create a song. input to the interval detection circuit 15 (step 104). For example, if the play/program switch 17 is pressed while the tape is being played back by feeding it in the normal direction,
The tape running direction is reversed to the reverse direction, and the tape is switched to the reverse side head 12, and the audio signal read from the head is inputted to the song interval detection circuit 15 via the preamplifier 14.

The song interval detection circuit 15 monitors the level of the input audio signal and determines whether the moment immediately after reversing the play direction is in the middle of the song (during the song).
Or check if it is between songs (Step 105)
, the main control unit 18 continues the play state if it is between songs (step 106).

However, if it is not between songs, in other words, if it is during a song, the main control section 18 inputs to the inter-song detection circuit 15 a command to cause the tape running control section 16 to rewind the tape in the opposite direction to the current running direction. (Step 107).

The song interval detection circuit 15 checks whether it is between songs using the input audio signal (step 108), continues backskipping if it is not between songs, and sends an inter-song detection signal Mis if it detects an interval. Output.

Upon detecting the gap between songs, the main control unit 18 causes the tape running control unit 16 to stop rewinding (backskip), and also causes the tape to move in the opposite direction to the backskip direction (the reverse direction immediately after the play/program switch is suppressed). The data is sent at the playback speed and the head changeover switch 13 is turned to switch the head to perform playback (step 109), and play continues thereafter (step 106).

Incidentally, the above is a case in which, if immediately after reversing the play direction in step 105, is in the middle of the song, rewinding is performed to find the beginning of the song, but it is also possible to fast-forward the tape and find the beginning of the song. It can also be configured to do so. It is also possible to provide two play/program switches so that one switch is used to locate the beginning of the disc by rewinding the disc, and the other switch is used to locate the beginning of the disc by fast forwarding.

It is also possible to configure the system so that if the play/program switch is pressed during backskip or fast forwarding in step 107, the system shifts to the play state.

Furthermore, it is also possible to provide a switch for switching between conventional program reversal control and program reversal control according to the present invention, and use the switch to perform program reversal control in an appropriate predetermined manner.

Furthermore, the above is a case in which the present invention is applied to an auto-reverse type cassette tape player which is provided with a normal side head and a reverse side head for the normal direction and the reverse direction, respectively. The present invention can also be applied to an auto-reverse type cassette tape player configured to rotate the head depending on the direction.

<Effects of the Invention> According to the present invention, when the play/program switch is pressed, the beginning of the song is found by rewinding or fast forwarding, and then the play state is entered. The direction of play can be reversed, and the song can always be played from the beginning, improving operability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an auto-reverse cassette tape player that implements the present invention, and FIG. 2 is a flowchart of the process of the present invention. 11...Normal side head, 12ψ reverse side head, 13...Head changeover switch, 15...Song interval detection circuit, 16...Tape running control section, 17...Play/program switch, 18...Main control section .

Claims (1)

[Claims] In an auto-reverse cassette tape player equipped with a switch for reversing the running direction of the tape during play, when the switch is pressed, the beginning of the song is retrieved by rewinding or fast forwarding, and then the playback is performed. An auto-reverse type cassette tape player characterized by the following: