JP2530248Y2 - Cassette deck - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette deck for reproducing a headphone output of a portable audio device from a speaker by inserting a dummy pack.

[0002]

2. Description of the Related Art The appearance is the same as a normal cassette pack, but without a magnetic tape. Instead, there is a dummy pack with a built-in magnetic head. When this is inserted into a cassette deck, a cord is inserted into the dummy pack via a cord. The headphone output of a portable audio device (DAT, CD player, etc.) input through the speaker system can be reproduced by a speaker system to which a cassette deck is connected.

[0003] In this case, the cassette deck is brought into a reproducing state,
The headphone output is delivered by bringing the deck-side magnetic head (playback) into contact with the pack-side magnetic head (recording).

[0004]

When the cassette deck is set in the reproducing state, the magnetic head moves forward, the capstan motor rotates, and the capstan shaft and the take-up reel rotate. However, the dummy pack does not need to rotate the capstan motor, but rather has the disadvantage of deteriorating high quality audio signals due to generation of motor noise.

The present invention is intended to prevent the generation of motor noise by preventing the capstan motor from rotating when the dummy pack is inserted.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a cassette deck for reproducing a headphone output of a portable audio device by inserting a dummy pack containing a magnetic head.
Means for discriminating a normal cassette pack and the dummy pack from the rotation speeds of the take-up side and the supply side reels,
Means for stopping the capstan motor when the dummy pack is inserted to bring it into a reproducing state.

[0007]

The normal cassette pack and the dummy pack can be discriminated by whether or not both the take-up reel and the supply reel rotate at high speed in the reproducing state. For this reason, when the dummy pack is determined, the capstan motor is stopped and the magnetic head is moved forward to set the irregular reproduction mode, so that the headphone output of the portable audio device is reproduced by the speaker without generating motor noise. it can.

[0008]

1 is a block diagram of the present invention.
D player, 2 is a dummy pack, 3 is a cassette deck,
Reference numeral 4 denotes a speaker. The headphone 5 is originally connected to the headphone output terminal 11 of the CD player 1, but here, the dummy pack 2 is connected via the cord 6.

The dummy pack 2 has a built-in magnetic head 21 to which a headphone output is supplied via a cord 6. The dummy pack 2 includes left and right reels 22L, 22L.
R is also provided, and both are connected by a connection gear 23. This is to stop the function of discharging when one of the reels is stopped in the reproduction state.

FIG. 2 shows an internal mechanism of the cassette deck 3.
1L and 31R are reel gears, 32L and 32R are idler gears, 33L and 33R are flywheels, 34L and 34.
R is a flywheel gear, 35L and 35R are capstan shafts, 36L and 36R are pinch rollers, 37 is a capstan motor, 38 is a belt, and 39 is a magnetic head.

In a normal reproducing state, for example, the idler gear 32L is connected to the flywheel gear 34L and the reel gear 31L.
The rotation of the motor 37 causes the capstan shaft 35 to rotate.
L and the reel gear 31L also rotate. At this time, the magnetic head 39 moves forward and contacts the magnetic tape in the case of a normal cassette pack, and contacts the magnetic head 21 in the case of the dummy pack 2. The idler gear 32
R meshes with the flywheel gear 34R and the reel gear 31R when reversing the magnetic tape.

The cassette deck 3 incorporates a control microcomputer and distinguishes a normal cassette pack and a dummy pack from the rotation of the reel gears 31L and 31R. FIG. 3 is a flowchart at the time of reproduction showing this processing. Step S1 is a process for determining whether or not any pack has been completely inserted. For example, this is determined from the state of the insertion completion detection switch. If it is determined in step S1 that the insertion is completed, the capstan motor 37 is rotated in step S2. Then, in step S3, it is determined from the reel pulse whether or not the take-up reel is rotating at a high speed.

In a normal cassette pack, since the magnetic tape is wound, the take-up reel rotates at a low speed.
Therefore, at this time, the reproducing operation is started in step S4 while the capstan motor is being rotated.

On the other hand, when it is determined in step S3 that the take-up reel is rotating at high speed, it is determined in step S5 whether the supply reel is also rotating at high speed.
If a tape break occurs in a normal cassette pack, the supply reel is stopped even if the take-up reel rotates at high speed. Therefore, at this time, the pack discharging operation is performed in step S6.

On the other hand, as shown in FIG.
Are connected by the connecting gear 23, both the take-up reel and the supply reel rotate at high speed. Accordingly, at this time, the capstan motor 37 is stopped in step S7, and then the reproduction is started in step S8. In this case, the pack discharge function associated with the reel stop described above is stopped.

In this way, a normal cassette pack and a dummy pack are distinguished only by software, and the generation of motor noise is prevented when the dummy pack is inserted.
Further, if step S6 is added as shown in FIG. 3, if the normal cassette pack is out of tape, it is automatically ejected separately from the dummy pack, so that a situation in which no sound is produced forever can be quickly avoided.

[0017]

As described above, according to the present invention, in a cassette deck for reproducing the headphone output of a portable audio device by inserting a dummy pack, when the dummy pack is inserted, the capstan motor is stopped to reduce the motor noise. Can be prevented from occurring.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of the present invention.

FIG. 2 is an internal mechanism diagram of the cassette deck.

FIG. 3 is a flowchart of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Portable audio equipment 2 Dummy pack 3 Cassette deck 4 Speaker 11 Headphone output terminal

Claims (1)

(57) [Scope of request for utility model registration] 1. A cassette deck for reproducing a headphone output of a portable audio device by inserting a dummy pack having a built-in magnetic head, and a rotation speed of a reel on a winding side and a supply side of a normal cassette pack and the dummy pack. And a means for stopping the capstan motor when the dummy pack is inserted to bring it into a reproducing state.