JPH079246Y2 - Eject signal generator for compound playback equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an eject signal generation device for a compound playback device, particularly a small installation space, a cassette tape,
The present invention relates to an eject signal generation device for a compound playback device suitable for a vehicle-mounted compound audio device that plays back a plurality of source media such as CDs.

[Conventional technology]

Conventionally, in a car audio device, a cassette deck and a CD player, or a CD player and a DAT, etc. are incorporated into one device, and a plurality of source media such as a cassette tape and a CD or a CD and a DAT tape can be switched and reproduced. The composite form is used.

FIG. 11 shows an external front view of a conventional vehicle-mounted composite audio device in which a cassette deck and a CD player are incorporated into one set.

When you insert the CD into the CD slot 10, the CD will play automatically,
If a cassette tape is inserted into the cassette insertion slot 12 during CD reproduction, the cassette tape is automatically reproduced and the CD reproduction is stopped at the same time.

When the eject key 14 is turned on to take out the CD from the set, the CD is ejected and the CD is taken out from the CD insertion slot 10.

If the eject key 14 is turned on during CD playback,
After the playback of is stopped, it is ejected and taken out to the CD insertion slot 10.

When the eject key 16 is turned on to take out the cassette tape from the set, the cassette tape is ejected and the cassette is taken out from the cassette insertion opening 12.

When the eject key 16 is turned on during the reproduction of the cassette tape, the reproduction of the cassette tape is stopped and then the cassette tape is ejected and taken out to the cassette insertion slot 12.

[Problems to be solved by the device]

However, in such a conventional technique, two eject keys, that is, the eject key 16 for ejecting the cassette tape and the eject key 14 for ejecting the CD are provided separately, and therefore, the eject key relating to the source medium to be ejected is provided. It was difficult for the operator to know where was.

In addition, installing two eject keys in an in-vehicle set with a limited installation space is a heavy load on the space, and there is a restriction on the installation space and display area of other keys. If the size of the eject key itself is reduced so as not to restrict the installation space and the size of the display area, there is a problem that the operation becomes difficult.

Further, providing two eject keys imposes a heavy cost burden.

In view of the above-mentioned problems of the prior art, the present invention provides an eject signal generation device for a compound playback device, which can reduce the space and cost problems related to the eject key and improve operability. To aim.

[Means for Solving the Problems]

The eject signal generator of the composite playback device of this invention is
Continuation of the operation of the eject key in the eject signal generation device of the compound playback device capable of switching and reproducing two or more source media and selectively ejecting the source media based on the two or more eject signals Time measuring means for measuring time and a length of operation duration are compared with predetermined one or more different reference times, and two or more different eject signals according to the length of operation duration are generated. And an eject signal generating means for performing.

〔Example〕

Next, one embodiment of this invention will be described with reference to FIG.

FIG. 2 is a block diagram of a vehicle-mounted composite audio device in which the cassette deck and the CD player according to the present invention are incorporated into one set.

The CD mechanical unit 20 performs CD loading, eject (unloading), rotation, detection of a disc recording signal by an optical pickup (not shown), and the like.

When a CD is inserted into the CD insertion slot 72 (see FIG. 1), the CD mechanical unit 20 detects this and outputs a CD insertion detection signal.
A CD insertion detection circuit 22 and a CD which outputs a CD detection signal a which becomes "H" level when the CD is set on a rotary table (not shown) and becomes "L" level when the CD is not set.
A detection circuit 24 is attached.

A CD reproducing unit 26 is connected to the output side of the optical pickup of the CD mechanical unit 20, and demodulates audio sample data from the RF signal and performs D / A conversion.

The output side of the CD reproducing section 26 is connected to one input side of the changeover switch SW.

On the other hand, the cassette mechanical unit 30 performs loading, ejecting (unloading) of the cassette tape, running of the tape, detection of a tape recording signal by the head, and the like.

In this cassette mechanism section 30, a cassette insertion detection circuit that detects when a cassette tape is inserted into the cassette insertion port 74 (see FIG. 1) and outputs a cassette insertion detection signal.
32, and a cassette detection circuit 34 for outputting a cassette detection signal b which becomes "H" level when the cassette tape is set in the tape running system (not shown) and becomes "L" level when not set. ing.

An amplifier section 36 is connected to the output side of the head of the cassette mechanical section 30, and the head detection signal is amplified and equalized.

The output side of the amplifier section 36 is connected to the other input side of the changeover switch SW.

The output side of the changeover switch SW is connected to an audio amplifier section (not shown), and the audio amplifier section performs volume adjustment and amplification of the audio signal and outputs the amplified audio signal to the speaker.

A system microcomputer (hereinafter simply referred to as "system microcomputer") is provided in the CD mechanical unit 20 and the cassette mechanical unit 30.
40 are connected.

CD mechanical unit 20 and cassette mechanical unit 30 are system microcomputer 40
A predetermined operation is performed based on various control signals such as a loading / unloading control signal, a PLAY start control signal, and a STOP control signal input from the.

The output sides of the CD insertion detection circuit 22, the CD detection circuit 24, the cassette insertion detection circuit 32, and the cassette detection circuit 34 are connected to the system microcomputer 40, and a CD insertion detection signal, a CD detection signal a, a cassette insertion detection signal, The cassette detection signal b is input to the system microcomputer 40.

A key input section 50 is connected to the input side of the system microcomputer 40, and a changeover switch SW is connected to the output side.

The key input section 50 includes an eject key 52, a PLAT key 54, and a STOP key.
A key 56 and a mode switching key 58 are provided (first
When the user turns on the key, the key input section 50
Outputs a key-on signal to the system microcomputer 40.

The changeover switch SW switches the switch in accordance with a changeover control signal input from the system microcomputer 40.

The system microcomputer 40 has a CPU, a ROM, and a RAM connected to a bus, and based on a predetermined program stored in the ROM,
CD / cassette tape loading / unloading control, CD / cassette tape playback control, CD / cassette tape playback stop control, changeover switch SW switching control, etc. according to user's key operation, CD insertion operation, cassette insertion operation The process of is executed.

In the RAM of the system microcomputer 40, a flag A (0: stop, 1: play) indicating that a CD is playing, a flag B (0: stop, 1: play) indicating that a cassette tape is being played, and a play mode of CD
An area is provided for storing a flag M (0: cassette tape, 1: CD) indicating whether it is a cassette tape or a cassette tape.

FIG. 1 is an external front view of an operation panel 70 of a vehicle-mounted composite audio device according to this embodiment, in which a CD insertion port 72 is provided on the upper side, a display area 76 is provided at the center, and a cassette insertion port 74 is provided on the lower side. There is.

The eject key 52 is located on the left side of the CD insertion slot 72, the volume 78 is located on the left side of the cassette insertion slot 74, the PLAY key 54, the STOP key 56, and the mode switching key 58 are located between the CD insertion slot 72 and the display area 76. Is provided.

Next, the operation of this embodiment will be described with reference to the flowcharts of FIGS.

Initially, when the power switch is turned on with both the CD and cassette tape ejected, the system microcomputer
40 performs a predetermined initialization process to clear the flags A, B and M (step 300 in FIG. 3).

Next, the system microcomputer 40 waits for the input of the CD insertion detection signal or the cassette insertion detection signal (step 302), and step 400 of FIG. 4).

When the user inserts the CD into the CD insertion port 72 to listen to the CD, the CD insertion detection circuit 22 of the CD mechanical section 20 detects and outputs a CD insertion detection signal to the system microcomputer 40.

When the system microcomputer 40 receives the CD insertion detection signal,
It is determined that the CD is inserted (YES in step 302), the M mode is set to 1 and the CD mode is set, and then the CD mechanical unit 20 is subjected to loading control to load the CD and set it on the rotary table ( Steps 304, 306).

Subsequently, the system microcomputer 40 determines whether the flag B is 1 (step 308), and in this case, the cassette tape is PLAY.
Since B is 0 instead of middle, it is judged NO in step 308,
The changeover switch SW is controlled to be changed over to the CD side (step 310).

Then, the PLAY start control is performed on the CD mechanical unit 20 to rotate the CD and detect the disc recording signal by the optical pickup (step 312). Then, the flag A is set to register that the CD is being played. (Step 314).

The RF signal output from the optical pickup of the CD mechanical unit 20 is CD
The audio sample data sent to the reproducing unit 26 is demodulated, and further D / A converted to output an analog audio signal.

This audio signal is sent to the audio amplifier section via the change-over switch SW, and after volume adjustment and amplification is performed, it is output to the speaker for acoustic reproduction.

After the processing of step 314 in FIG. 3, the system microcomputer 40 determines whether or not the cassette insertion detection signal is input (step 400 in FIG. 4), the STOP key 56, and the eject key.
The determination as to whether or not 52 is turned on (step 500 in FIG. 5, step 800 in FIG. 8) is repeated.

When the user wants to stop playing the CD, he turns on the STOP key 56.

At this time, a key-on signal relating to the STOP key 56 is output from the key input unit 50 to the system microcomputer 40.

Then, the system microcomputer 40 sets Y in step 500 of FIG.
After judging ES and confirming that A is 1 and the CD is playing (step 502), stop control is performed to the CD mechanical section 20 to stop the rotation of the CD (step 504).

Then, the flag A is cleared to 0 (step 50).
6).

When the rotation of the CD stops, the RF signal output from the optical pickup stops, the CD reproducing unit 26 stops demodulating the audio sample data, and the audio signal output stops.

This will stop the CD playing.

When the user wants to listen to the CD performance again, the PLAY key 54 is turned on.

At this time, a key-on signal for the PLAY key 54 is output from the key input unit 50 to the system microcomputer 40.

Then, the system microcomputer 40 returns Y in step 600 of FIG.
After determining that the ES is not 1 and that neither A nor B is 1 and that neither the CD nor the cassette tape is playing (step 602), the level states of the CD detection signal a and the cassette detection signal b are determined, In this case, the CD detection circuit 24 outputs the "H" level CD detection signal a, and the cassette detection circuit 34
Outputs the cassette detection signal b of "L" level, it is judged NO in step 604 and YES in step 606.

At this time, the system microcomputer 40 switches the changeover switch SW.
After switching control to the CD side (step 608), a PLAY start control signal is output to the CD mechanical section 20 to cause rotation of the CD and detection of the disc recording signal (step 610).

At this time, the output of the RF signal from the optical pickup is restarted, and the CD reproducing unit 26 demodulates the audio sample data and performs D / A conversion.
A conversion is performed, the audio signal is output, and the CD performance is restarted.

The system microcomputer 40 sets the flag A to 1 after the process of step 610 (step 612).

After that, when the user wants to listen to the cassette tape while playing the CD, the cassette tape is inserted into the cassette insertion slot 74.

Then, the cassette insertion detection circuit 32 of the cassette mechanical section 30 outputs a cassette insertion detection signal to the system microcomputer 40.

The system microcomputer 40 is urged to input the cassette insertion detection signal, determines YES in step 400 of FIG. 4, and sets M to 0.
And change to cassette mode (step 40
2) The loading control is performed on the cassette mechanical unit 30 to set the cassette tape in the tape running system (step 404).

When the cassette tape is set in the tape running system, the cassette detection circuit 34 detects it and outputs the "H" level cassette detection signal b to the system microcomputer 40.

The system microcomputer 40 then refers to flag A
It is determined whether or not PLAY is in progress (step 406). In this case, since flag A = 1 and CD play is in progress, stop control is performed on the CD mechanical section 20 to stop the rotation of the CD and stop the performance (step 408). ), The flag A is cleared (step 410).

Then, the changeover switch SW is controlled to change to the cassette side (switch 412), the PLAY start control is performed for the cassette mechanical section 30, and the tape PLAY running is started (step 414).

Then, the audio signal recorded on the tape is detected by the head, amplified and equalized by the amplifier unit 36, and then output to the audio amplifier unit via the changeover switch SW.

As a result, the performance of the cassette is started.

After the processing of step 414, the system microcomputer 40 sets the flag B to 1 to indicate that the cassette tape is being played (step 416).

During the cassette performance, the system microcomputer 40 determines whether or not the CD insertion detection signal is input (step 30 in FIG. 3).
2), it is determined whether or not the STOP key 56, the mode switching key 58, and the eject key 52 are turned on (step 500 in FIG. 5,
Step 700 in FIG. 7 and step 800 in FIG. 8) are repeated.

If the user wants to stop playing the cassette, the STOP key 56
Turn on.

At this time, a key-on signal relating to the STOP key 56 is output from the key input unit 50 to the system microcomputer 40.

Then, the system microcomputer 40 sets Y in step 500 of FIG.
After judging ES and confirming that B is 1 and the cassette tape is playing (step 508), the cassette mechanical section 30 is subjected to stop control to stop the cassette tape from traveling (step 510).

Then, the flag B is cleared to 0 (step 51).
2).

When the cassette tape stops running, the detection signal output from the head stops, and the audio signal output from the amplifier section 36 also stops.

This causes the cassette tape to stop playing.

When the user wants to listen to the performance of the cassette again, the PLAY key 54 is turned on.

At this time, a key-on signal for the PLAY key 54 is output from the key input unit 50 to the system microcomputer 40.

Then, the system microcomputer 40 returns Y in step 600 of FIG.
After determining that the ES is not 1 and that neither A nor B is 1 and that neither the CD nor the cassette tape is playing (step 602), the level states of the CD detection signal a and the cassette detection signal b are determined, In this case, the CD detection circuit 24 outputs the "H" level CD detection signal a, and the cassette detection circuit 34
Outputs the cassette detection signal b of "H" level, it is judged as YES in step 604.

At this time, the system microcomputer 40 refers to the flag M and confirms that M = 0 at present and is in the cassette mode (step 614), and then proceeds to step 414 in FIG. The start control is performed so that the tape runs and the tape recording signal is detected.

As a result, the performance of the cassette tape inserted later is resumed.

The system microcomputer 40 sets the flag B to 1 after the process of step 414 (step 416).

After that, when the user wants to switch from playing the cassette tape to playing the CD, the mode switching key 58 is turned on.

Then, the key-on signal related to the mode switching key 58 is output from the key input unit 50 to the system microcomputer 40.

The system microcomputer 40 is biased by the input of the key-on signal related to the mode switching key 58, and the Y is selected in step 700 of FIG.
ES is judged, A is 0 and CD is not playing, B is 1 and cassette tape is playing, so the level of the CD detection signal a is judged (steps 702 to 706).

In this case, the CD detection signal a is "H", the system microcomputer 40 determines YES in step 706, changes M to the CD mode of 1 (step 708), and then controls the cassette mechanical section 30 to stop. Then, the tape running is stopped to stop the performance of the cassette (step 710), and B is cleared (step 712).

Then, the selector switch SW is controlled to switch to the CD side (step 714), and the PLA
Y start control is performed to start the rotation of the CD and the detection of the disc recording signal by the optical pickup (step 716).

Then, the flag A is set to 1 (step 718).

In this way, when the user wants to take out the cassette while the CD is playing and the cassette is stopped, the eject key 52 is kept on for one second or more.

Then, the key-on signal related to the eject key 52 is output from the key input unit 50 to the system microcomputer 40 only while the user keeps the key on.

When the key-on signal for the eject key 52 is input, the system microcomputer 40 first determines that the eject key 52 has changed from off to on (step 80 in FIG. 8).
0) Set a timer for counting one second (step 802).

Then, it is determined whether the timer is up or the input of the key-on signal for the eject key 52 is stopped, and it is determined whether the ON operation duration of the eject key 52 is shorter than 1 second or longer (step 804, Repeat 806).

In this case, the user keeps the eject key 52 turned on for 1 second or longer, and the system microcomputer 40 sets the eject key 52 on operation time to 1
It is determined that the time is longer than the second (YES determination in step 804), and at this time, the second eject signal is generated, and the flow proceeds to FIG.

Then, first, it is judged whether or not the CD is being played when A = 1 (step 808). Since it is YES in this case, the level of the cassette detection signal b is continuously checked, and when b = “H”, the cassette becomes the tape running system. It is determined whether or not it is set (step 810). Since this is also YES in this case, the system microcomputer 40 performs cassette eject control on the cassette mechanical section 30 to unload the cassette tape to the cassette insertion slot 74. (Step 812).

At this time, the cassette detection signal b output from the cassette detection circuit 34 becomes "L" level.

This allows the user to take out a cassette tape that is not currently being played.

On the contrary, when the CD is playing and the cassette is stopped in the set (A = 1, B = 0, a = b =
In the "H" state), when the user wants to eject the CD being played, the user turns on the eject key 52 for a short time within one second.

Then, the key-on signal related to the eject key 52 is output from the key input unit 50 to the system microcomputer 40 only while the user keeps the key on.

When the key-on signal for the eject key 52 is input, the system microcomputer 40 first determines that the eject key 52 has changed from off to on (step 80 in FIG. 8).
0) Set a timer for counting one second (step 802).

Then, it is determined whether the timer is up or the input of the key-on signal for the eject key 52 is stopped, and it is determined whether the ON operation duration of the eject key 52 is shorter than 1 second or longer (step 804, Repeat 806).

In this case, the user turns on the eject key 52 for a short time, and the input of the key-on signal related to the eject key 52 is stopped before the timer times out. Is determined to be shorter than 1 second (YES in step 806), and if the first eject signal is generated at this time, first set A = 1.
It is determined whether or not the CD is being played (step 814).

In this case, it is YES, so the system microcomputer 40 is the CD mechanical unit 2
PLAY stop control is performed for 0 (step 816) and A is cleared (step 818).

Next, eject control is performed on the CD mechanical unit 20 to remove the CD.
Unload to CD slot 72 (step 82)
0).

At this time, the CD detection signal a output from the CD detection circuit 24 is "L".
It becomes a level.

This allows you to take out the CD you are playing.

In exactly the same way, only the CD is included in the set, and even when this CD is being played, the eject key 52 can be turned on for a short time to stop and eject the CD.

Also, unlike this, when the cassette is playing and the CD is stopped in the set (A = 0, B =
1, a = b = “H” state), when the user wants to eject the CD, the user keeps the eject key 52 turned on for one second or more.

When the key-on signal for the eject key 52 is input, the system microcomputer 40 first determines that the eject key 52 has been turned off (step 800 in FIG. 8) and sets a timer for counting one second. (Step 802).

Then, it is determined whether the timer is up or the input of the key-on signal for the eject key 52 is stopped, and it is determined whether the ON operation duration of the eject key 52 is shorter than 1 second or longer (step 804, Repeat 806).

In this case, the user continues to turn on the eject key 52 for 1 second or longer, and the timer expires first, so the system microcomputer 40 determines that the duration of the ON operation of the eject key 52 is longer than 1 second (step 804). YES judgment),
At this time, it is determined that the second eject signal is generated, and the flow proceeds to FIG.

Then, first, it is determined whether or not the CD is being played when A = 1 (step 808). Since it is NO in this case, it is then determined whether or not the cassette is being played when B = 1 (step 822). Since it is YES, the level state of the CD detection signal a is subsequently checked, and if a = “H”, it is determined whether or not the CD is set on the rotary table (step 824). The microcomputer 40 is the CD mechanical unit 20
Then, the CD eject control is performed to unload the CD to the CD insertion slot 72 (step 826).

At this time, the CD detection signal a output from the CD detection circuit 24 is "L".
It becomes a level.

This allows the user to eject a CD that is not currently playing.

On the contrary, when the cassette is playing and the CD is stopped in the set (A = 0, B = 1, a = b =
In the "H" state), when the user wants to eject the cassette being played, the user turns on the eject key 52 for a short time within 1 second.

Then, the key-on signal related to the eject key 52 is output from the key input unit 50 to the system microcomputer 40 only while the user keeps the key on.

When the key-on signal for the eject key 52 is input, the system microcomputer 40 first determines that the eject key 52 has changed from off to on (step 80 in FIG. 8).
0) Set a timer for counting one second (step 802).

Then, it is determined whether the timer is up or the input of the key-on signal for the eject key 52 is stopped, and it is determined whether the ON operation duration of the eject key 52 is shorter than 1 second or longer (step 804, Repeat 806).

In this case, the user turns on the eject key 52 for a short time, and the input of the key-on signal related to the eject key 52 is stopped before the timer times out, so the system microcomputer 40 continues to turn on the eject key 52. It is determined that the time is shorter than 1 second (YES in step 806), and if the first eject signal is generated at this time, first A =
In 1, it is determined whether or not the CD is being played (step 814).

Since it is NO in the present case, the system microcomputer 40 continues to B = 1.
Determines whether the cassette is playing or not (step 82).
8).

At this time, since it is YES, the system microcomputer 40 performs PLAY stop control on the cassette mechanical section 30 to stop tape running,
After the tape performance is stopped (step 830), B is cleared (step 832).

Then, eject control is performed on the cassette mechanical section 30 to unload the cassette to the cassette insertion port 74 (step 834).

At this time, the cassette detection signal b output from the cassette detection circuit 34 becomes "L" level.

This allows the user to take out the cassette being played.

In exactly the same manner, only the cassette tape is included in the set, and even when this cassette tape is playing, the cassette key can be stopped and ejected by operating the eject key 52 for one second or more.

When both the CD and the cassette are stopped in the set (A = B = 0, a = b = “H”), the user
When you want to remove the CD, turn on the eject key 52 for a short time within 1 second.

Then, similarly to the above, when the key-on signal for the eject key 52 is input, the system microcomputer 40 first determines that the eject key 52 has changed from off to on (step 800 in FIG. 8), A timer for measuring one second is set (step 802), and it is determined whether the time is up or the key-on signal input to the eject key 52 is stopped (steps 804 and 806).

In this case, since the key-on signal input related to the eject key 52 is stopped before the timer times out, the system microcomputer 40 determines that the eject key 52 has changed from on to off when the key-on signal input is stopped. (YES determination in step 806) If it is determined that the first eject signal is generated, it is determined whether or not the CD is playing at A = 1 (step 814).

Since it is NO here, it is subsequently determined whether or not the cassette is in play at B = 1 (step 816).

Since it is also NO here, the process proceeds to step 836, and the CD detection signal a
Is determined to be "H" level.

This time, it becomes YES, at which time the system microcomputer 40
Eject control is performed on the D mechanical unit 20 to insert the CD into the CD insertion slot 72
Unload until (step 820).

At this time, the CD detection signal a falls to "L" level.

As a result, the user can take out the CD from the CD and the cassette tape.

On the contrary, when the user wants to take out the cassette tape when the CD and the cassette tape are in the stopped state (A = B = 0, a = b = “H”), the eject key 52 Continue to turn on for more than 1 second.

Then, after the system microcomputer 40 sets the timer (steps 800 and 802 in FIG. 8) and before the input of the key-on signal related to the eject key 52 is stopped, the time elapses earlier, so that the second eject signal is generated. As a result, YES is determined in step 804, and the flow proceeds to FIG.

At this time, the system microcomputer 40 first determines whether the CD is being played and whether the cassette tape is being played (steps 808 and 822).
Therefore, it is subsequently determined whether or not the cassette tape is set in the tape running system (step 838), and since it is YES here, the system microcomputer 40 performs eject control to the cassette mechanical unit 30, and the cassette tape To the cassette insertion slot 74 (step
812).

At this time, the cassette detection signal b falls to "L" level.

This allows the user to take out the cassette tape from the cassette tape and the CD.

After that, when the user wants to take out the CD remaining in the set (A = B = 0, a = “H”, b = “L” state), the user does not operate the eject key 52 for any time. Good.

For example, when the user turns on the eject key 52 for 1 second or longer, after the system microcomputer 40 sets the timer in the same manner as described above (steps 800 and 802 in FIG. 8), the key-on signal input to the eject key 52 is not received. Since the time is up before it is stopped, it is determined to be YES in step 804, and it is assumed that the second eject signal is generated, and the process proceeds to the flow of FIG.

At this time, the system microcomputer 40 first determines whether or not the CD is playing and whether or not the cassette is playing (steps 808, 822). It is determined whether the tape is set in the tape running system (step 838), and again N
Since it becomes O, it is finally determined whether or not the CD is set on the rotary table (step 840).

Since the judgment in this step 840 is YES, the system microcomputer 40 performs eject control to the CD mechanical section 20,
To the CD insertion slot 72 (step 82
6).

At this time, the CD detection signal a falls to "L" level.

Also, when only the CD remains stopped in the set,
When the user turns on the eject key 52 for a short time within 1 second, the system microcomputer 40 sets the timer (steps 800 and 802) as described above, and the time-up and the key-on signal input for the eject key 52 are input. It is determined which of the stops is earlier (steps 804 and 806).

In this case, since the key-on signal input related to the eject key 52 is stopped before the timer times out, the system microcomputer 40 determines that the eject key 52 has changed from on to off when the key-on signal input is stopped. (YES in step 806). If it is determined that the first eject signal is generated, it is next determined whether the CD is playing and whether the cassette tape is playing (step 81).
4 and 828), all are NO, so proceed to step 836 and CD
It is determined whether the detection signal a is at "H" level.

This time, it becomes YES, at which time the system microcomputer 40
Eject control is performed on the D mechanical unit 20 to insert the CD into the CD insertion slot 72
Unload until (step 820).

At this time, the CD detection signal a falls to "L" level.

In this way, the CD remaining in the set can be taken out.

Unlike this, when only the cassette tape remains in the set in a stopped state (A = B = 0, a = “L”, b =
In the "H" state), when the user wants to take out the cassette tape, the eject key 52 may be turned on for an arbitrary time.

For example, when the user turns on the eject key 52 for 1 second or longer, after the system microcomputer 40 sets the timer in the same manner as described above (steps 800 and 802 in FIG. 8), the key-on signal input to the eject key 52 is not received. Since the time is up before the stop, it is judged YES in step 804, and it is assumed that the first eject signal is generated, and the process proceeds to the flow of FIG.

At this time, the system microcomputer 40 first determines whether or not the CD is playing and whether or not the cassette is playing (steps 808, 822). It is determined whether or not the tape is set in the tape running system (step 838).

Since the determination here is YES, the system microcomputer 40 performs eject control on the cassette mechanical section 30 to unload the cassette tape into the cassette insertion slot 74 (step 812).

At this time, the cassette detection signal b falls to "L" level.

If the user turns on the eject key 52 for a short time within 1 second while only the cassette tape remains in the set, the system microcomputer 40 sets the timer in the same manner as described above (step 802), it is determined whether the time is up or the input of the key-on signal related to the eject key 52 is stopped earlier (steps 804 and 806).

In this case, since the key-on signal input related to the eject key 52 is stopped before the time is up, the system microcomputer 40 determines that the eject key 52 is changed from on to off when the key-on signal input is stopped. (YES in step 806), it is determined whether or not the CD is playing and that the cassette tape is playing, assuming that the first eject signal is generated (steps 814, 8).
28), since both are NO, the routine proceeds to step 836, where it is judged whether or not the CD detection signal a is at "H" level.

Since this time is also NO, the system microcomputer 40 finally determines whether or not the cassette detection signal b is at the "H" level.

Here, the answer is YES, and at this time the system microcomputer 40
Eject control the cassette mechanical section 20 to unload the cassette tape to the cassette insertion port 74 (step 834).

At this time, the cassette detection signal b falls to "L" level.

As a result, the cassette tape remaining in the set can be taken out.

According to this embodiment, when the user turns on the eject key 52, the system microcomputer 40 measures the duration of the on-operation of the eject key 52 and determines whether it is shorter or longer than the reference time of 1 second, and Assume that an eject signal that is divided into the eject signal and the second eject signal is generated, and there are two source media, CD and cassette tape, in the set, and one is playing and the other is stopped. , System microcomputer when the first eject signal is generated
40 controls the eject of the source medium being played,
Conversely, if the second eject signal is generated, the system microcomputer
The reference numeral 40 controls the ejecting of the stopped source medium, and when the two source media of the CD and the cassette tape are contained in the set and both are stopped, the first
When an eject signal is generated, the system microcomputer 40
When the second eject signal is generated, the system microcomputer 40 performs the eject control of the cassette tape. Moreover, only one of the CD and the cassette tape is in the set, and the play In the middle, when the first eject signal is generated, the system microcomputer 40 performs the eject control of the source medium being played, and when only one of the CD or the cassette tape is in the set and it is stopped. Is configured so that the system microcomputer 40 performs the eject control of the stopped source medium by both the first eject signal and the second eject signal, so that only one eject key 52
Both CD and cassette tape can be ejected as desired by the user.

This makes it easier to find the eject key and saves the key layout space without making the eject key particularly small, which improves operability and is advantageous in terms of space and cost. Can be lowered.

In the above-described embodiment, 1 second is used as the reference time for determining the length of the ON operation duration of the eject key, but this may be another length of time.

Further, although the set has two built-in CD players and cassette decks, other sets such as a CD player and DAT may be used.

Further, it may be a device for reproducing a video source medium such as a CDV player and a cassette deck.

In addition, even for devices that switch and play three or more source media such as CD players, cassette decks, and DATs, the on-operation duration of one eject key is classified into three or more with two or more different reference times, and three or more. It is also possible to arbitrarily eject three or more source media by handling the generation of the eject signal divided into two.

Further, in the above-described embodiment, an example in which the CD player and the cassette deck are incorporated in one case 80 (see FIG. 1) is given, but the present invention is not limited to this, and is shown in FIG. It is divided into a main body case 90 containing the CD mechanical part, the CD reproducing part, the system microcomputer, etc., and a sub-case 92 containing the cassette mechanical part, the amplifier part, and it is applied to a set mutually connected by a cable 94. Only one eject key 96 needs to be installed on the body case 90 side, and the sub case
The operation panel 92A on the 92 side can be downsized.

[Effect of device]

In the eject signal generator of the composite reproducing apparatus according to the present invention, the operation continuation time is compared with the time measuring means for measuring the operation continuation time of the eject key, and the operation continuation time length is compared with one or more predetermined reference times different from each other. By providing an eject signal generating means for generating two or more different eject signals according to the length of time,
Two or more source media can be arbitrarily ejected with one eject key, which makes it easy to find the eject key, saves space, and can reduce manufacturing cost. .

[Brief description of drawings]

FIG. 1 is an external front view of a vehicle-mounted composite audio device according to an embodiment of the present invention, FIG. 2 is a block diagram of the vehicle-mounted composite audio device of FIG. 1, and FIGS. A flow chart showing the operation of the system microcomputer in the figure,
FIG. 10 is an external front view showing a modified example of the vehicle-mounted composite audio device of FIG. FIG. 11 is an external front view of a conventional vehicle-mounted composite audio device. Explanation of main symbols 20: CD mechanism part, 30: cassette mechanism part, 40: system microcomputer, 52,96: eject key, 70: operation panel, 72: CD insertion slot, 74: cassette insertion slot.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hironao Atsumi 2-17-5 Shibuya, Shibuya-ku, Tokyo Kenwood Co., Ltd. (56) References JP 61-196491 (JP, A) JP 61 -271660 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. An eject signal generating device of a composite reproducing apparatus capable of switching and reproducing two or more source media, and selectively ejecting the source medium based on two or more eject signals. The time keeping means for measuring the operation duration of the eject key and the length of the operation duration are compared with a predetermined one or two or more different reference times, and the operation duration is adjusted according to the length of the operation duration.
Alternatively, an eject signal generating device for a compound reproducing device, comprising: three or more eject signal generating means for generating different eject signals.