JPS6235187Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a tape recorder, and more particularly to an operating device suitable for use when a packaged tuner unit is used in a detachable manner.

2. Description of the Related Art In recent years, so-called tape recorders with radios, in which a radio receiver (tuner) is integrated into a tape recorder, have rapidly become popular. Such tape recorders with radios tend to be larger in size due to the trend toward multifunctionality and higher quality.

On the other hand, if portability is a concern, it is necessary to make the tape recorder as compact as possible, so a tuner unit that is packaged separately can be attached to the compact (thin) tape recorder as needed. It has been considered to make the device detachable in various forms.

Therefore, this invention was made in view of the above points, and is suitable when a tape recorder and a radio receiver are used in combination, especially when a packaged tuner unit is used as a detachable unit. It is an object of the present invention to provide an operating device for a tape recorder that can contribute to simplifying the configuration and making it smaller (thinner).

In other words, the tape recorder operating device according to this invention is necessary for mode switching between tape mode and radio mode and for tape recorder operation, which is necessary in this type of tape recorder that uses a tape recorder combined with a radio receiver. This switch is characterized in that a single switch can serve as a pause function, thereby contributing to the simplification and miniaturization (thinness) of the configuration.

Hereinafter, an embodiment of this invention applied to a case where a packaged tuner unit is used in a compact (thin) tape recorder in a detachable manner will be described in detail with reference to the drawings. That is,
Figure 1 shows the external appearance of a tape recorder to which this invention has been applied.The tape recorder 11 is approximately box-shaped and is designed to be as small (thin and thin as possible) so that it can be easily carried around in a user's pocket. The front cabinet 1
2 and rear cabinet 13 are combined. On the left side of the cabinet 11 in the figure, rewind, fast forward, playback, and stop/eject operators 14 to 17 are provided. Further, a talk operator 18 is provided above the playback operator 16 in the figure. This talk operator 18
can be operated by pressing together with the playback control 16, and when this is operated, ambient sounds are heard through the built-in microphone 19 provided at the upper end of the cabinet 11, regardless of whether the tape is being played or the radio is operating. You can listen to it without taking off your headphones, which will be explained later.

Furthermore, when the rewind or fast forward operators 14 and 15 are operated while the playback operator 16 is operated and the tape is being played back, the tape recorder enters the review or queue state. Furthermore, rewind,
If the stop/eject operator 17 is operated while any of the fast forward and playback operators 14 to 16 has been operated in advance, the operator 14 to 16 that was operated earlier returns to its non-operating position. , when the stop/eject operator 17 is operated for the second time,
A so-called double eject mechanism is provided for ejecting a tape cassette (not shown).

Here, on the left side of the cabinet 11 in the figure, in the lower part of the part where the rewind, fast forward, play and stop/eject operators 14 to 17 are arranged, there are volume adjustment operators 20, 21. is provided. These volume adjustment operators 20 and 21 are for the right channel and left channel of the stereo, respectively, and are slidable in the directions of arrows A and B in the figure, respectively, and the volume increases as they are operated in the direction of arrow B.

Further, on the upper surface of the cabinet 11 in the figure, there are a battery indicator 22, a tape type selection switch 23, a tone switch 24, a radio indicator 25, and a tape-radio selection switch 2.
6 and a headphone jack 27 are provided, respectively. Of these, the battery indicator 22 is a meter that indicates the degree of battery power consumption.
It can operate both when the tape is running and when the radio is operating. Further, the tape type changeover switch 23 is used to change over the tape used depending on whether it is a normal tape or a chrome tape.
Furthermore, the tone switch 24 switches to the LOW or HIGH side depending on, for example, whether or not the tape used has been subjected to noise reduction processing. The tape-radio selector switch 26 is used to switch depending on whether the tape is played back or the tuner pack is used for radio reception. This prevents the tape running motor from rotating, which helps conserve battery power. Therefore, by switching the tape-radio changeover switch 26 to the radio side while the tape is being played back, a so-called pause function can be performed to temporarily stop the tape running. Further, when the tape-radio changeover switch 26 is switched to the radio side, the radio indicator 25 lights up. Further, the headphone jack 27 has a headphone plug attached to the end of a headphone cord extending from a headphone (not shown) inserted therein, and this headphone cord serves as an FM antenna during radio operation.

Here, in the front cabinet 12 of the cabinet 11, a tape cassette storage section 28 is formed. Inside this tape cassette storage section 28,
A pair of reel stands 29, 30, a pair of cassette guide pins not visible in the figure, a reproducing head, a pinch roller, a capstan, a group of connectors for connecting tuner packs to be described later, etc. are arranged at predetermined positions, respectively. The tape cassette storage section 28 is closed by a cassette lid 31 made of, for example, a transparent acrylic plate.

The tape recorder of this embodiment is for reproduction only, and its reproduction output can be listened to using only the above-mentioned headphones.

Here, FIG. 2 shows the external appearance of a tuner unit (hereinafter simply referred to as tuner pack) which is integrated into the tape recorder and is used to receive radio broadcasts. That is, a casing 33 has substantially the same shape and size as a normal tape cassette, and is formed by combining a top casing 34 and a bottom casing 35. The tuner pack is attached to the tape recorder by attaching the tuner pack to the tape cassette storage part 28 of the tape recorder in the part of the casing 33 that corresponds to the head insertion port and pinch roller insertion port of a normal tape cassette. a recess 3 for escaping the reproducing head and pinch roller when used
6, 37 are formed. In addition, the recess 3
Insertion holes 38 and 39 for the cassette guide pin and capstan are formed at the upper and lower parts of the figures 6 and 37, respectively. Further, on the upper casing 34 of this casing 33, there is a reception frequency display board 40, a music selection dial 41, a monaural-stereo changeover switch 42, and an FM stereo-monaural display section 43.
are arranged respectively. This reception frequency display plate 40 is circular and has numbers indicating reception frequencies attached at appropriate frequency intervals along its outer periphery as shown in the figure. Then, the received frequency display board 40
is rotated clockwise and counterclockwise in the figure by rotating the tuning dial 41, and the receiving frequency display board 40 and the tuning dial 41
The number indicated by a substantially triangular indicator 44 attached between the two is read as the reception frequency at that time. Also, F.M.
The stereo-monaural display section 43 is, for example, an LED
It is constructed using (light-emitting diodes),
It lights up when receiving an FM stereo broadcast and turns off when receiving an FM monaural broadcast.

Although not visible in the figure, a group of contact pins protrudes from the bottom of the bottom casing 35 of the tuner pack and is electrically contacted via a connector group provided in the tape cassette storage section 28 of the tape recorder as described later. has been done.

FIG. 3 is a block diagram showing the electrical circuit system of the tape recorder section TR and tuner pack section TP constructed as described above.

First, the tape-radio selector switch 26
The function switch S0 corresponding to ₁ is set to the tape mode T side, and tape playback is performed as if playing a normal music tape (cassette) etc. that has been installed in the tape cassette storage section 28 of the tape recorder. Let me explain the case. That is, in this case, the regeneration operator 16 is operated first, and a predetermined power supply voltage from the power supply circuit PS is supplied to the power supply line Vcc via the power switch _S1 , which is closed in conjunction with this operation. . Here, the power supply circuit PS is a built-in battery or an external DC power supply.

As a result, the governor circuit GC is driven via the tape mode T side of the function switch _S0 set as described above, and as a result, the tape drive motor M is driven.

Then, tape running is started and reproduction output is produced from the left and right magnetic heads H _L and _HR . In this case, these playback signals are sent to the left and right preamplifiers PA ₁ , without being attenuated in any way via the talk switches S ₂ a and S ₂ b, which are both set to the [OFF] side.
Supplied to PA ₂ . Here, both playback signals have predetermined equalizer characteristics depending on the tape used because equalizer switching circuits EQ ₁ and EQ ₂ are inserted in advance, respectively, which are switched by the tape switching switch 23 described above. After being amplified, the tone switching circuits TC ₁ and TC ₂ and the volume adjustment operator 2 are switched by the tone switch 24 described above.
Volume VR ₁ adjusted by 0,21,
Left and right main up MA ₁ via VR ₂ correspondingly,
Supplied to MA ₂ .

In this case, the preamplifiers PA ₁ , PA ₂ and the main amplifiers MA ₁ , MA ₂ are each integrated into an IC, and their power supply sections are connected directly to the power supply line Vcc or from a circuit provided inside them. A predetermined power supply voltage is supplied through the pull filters LF ₁ and LF ₂ as shown by the broken line in the figure.

Then, both reproduction signals whose power has been amplified to the required level by the left and right main amplifiers MA ₁ and MA ₂ are sent to the aforementioned headphone jack via the attenuators ATT ₁ and ATT ₂ and the RF filters RF ₁ and RF ₂ correspondingly. By supplying the signal to the stereo headphone HP connected in advance to the stereo headphone HP via the stereo headphone 27 (provided for stereo use), the tape can be played back.

In the above-mentioned tape playback state, when a pause function is to be performed to temporarily stop the tape running, the tape-radio changeover switch 26, i.e., the function switch _S0 , which also serves as the pause function during tape playback, is temporarily switched from the tape mode T side to the radio mode R side. In other words, this temporarily stops the tape drive motor M and each amplifier, etc., thereby performing a so-called electrical pause function. In the case of this pause function, since a normal (music) tape cassette, not a tuner pack, is loaded in the cassette storage section 28, the radio sound will not be emitted even if the function switch _S0 is temporarily switched to the radio mode R side to enter the pause state.

Next, a radio operation in which a tuner pack as described above is attached to the tape cassette storage section 28 of a tape recorder and radio broadcasts are received will be described. That is, in this case, the function switch _S0 is first set to the radio mode R side, and the playback operator 16 is operated to close the power switch _S1 . Then, the power line
The power supply voltage from Vcc is the function switch S ₀
The signal is supplied to a display element, for example, a light emitting diode LED ₁ , through the radio mode R side of the switch, and by lighting it up, it is displayed that the radio mode R is set. (When the pause function is used in the case of tape playback described above, the display indicates that the pause function is set.) Of course, in this case, the power supply voltage is no longer supplied to the tape drive motor M, but the power supply voltage is not supplied to each amplifier, etc. is supplied in the same manner as described above.

In addition, in this case, the tape cassette storage section 28 of the tape recorder is electrically contacted in correspondence with a plurality of contact pins _P1 to _P6 provided on the bottom surface of the tuner pack TP installed in the storage section, as described above. A plurality of connectors T ₁ to _{T 6} are provided (however, T ₁ and P ₁ are for grounding, and T ₆ and P ₆ are for backup). A predetermined power supply voltage is supplied to the connector _T4 from the power supply line Vcc via the ripple filter _LF3 .

As a result, a predetermined power supply voltage is also supplied to each section in the tuner pack TP, which will be described later, via the contact pin _P4 . Incidentally, when playing back the tape mentioned above, since such contact pins are not provided in the normal tape cassette used at that time, there is no problem at all.

In this case, the antenna terminal connector _{T5 on the tape cassette storage section 28 side is connected to the antenna terminal connector T5} as described above.
Connection cord for headphone HP that serves as FM antenna
ANT is connected to antenna resonant circuits AR ₁ and AR ₂ in parallel or in series.

With this, the Tuner Pack TP passes the FM broadcast reception signal supplied via its contact pin _P5 to a bandpass filter (76~76 for domestic use).
108MHz) (B, P, F), high frequency amplification section RF-
Leads to the frequency conversion section (CONV.) via AMP,
Here, after converting the local oscillation signal from the local oscillator OSC into a predetermined intermediate frequency signal, the intermediate frequency amplification section IF-AMP and the FM multiplex section FM-
Separate into left and right stereo signals via MPX (in the case of monaural, simply output the same components without separating)
and is led out to the contact pins P ₂ and P ₃ . In this case, switching between monaural and stereo can be selected using the above-mentioned monaural/stereo changeover switch 42, and when receiving stereo, the above-mentioned FM stereo/mora-noral display section 43 can be selected.
A stereo indicator 43a composed of a light emitting diode is illuminated as shown in FIG. That is, in regions with weak electric fields, there may be a lot of noise when receiving stereo broadcasts, but in such cases the monaural/stereo changeover switch 42 is used to switch to monaural.

For channel selection, use the channel selection dial 4 mentioned above.
In step 1, the oscillation frequency of the local oscillator OSC and the tuning section of the high frequency amplification section RF-AMP are varied to tune to a desired broadcasting station.

Then, the contact pins P ₂ and P ₃ were derived
The FM broadcast reception signal is supplied to the output section of the left and right tone switching circuits TC ₁ and TC ₂ via connectors T ₂ and T ₃ on the tape recorder side and attenuators ATT ₃ and ATT ₄ connected to these connectors. Then, by playing the stereo headphone HP in the same way as when playing the tape described above, a radio operation can be performed.

In this case, the attenuators ATT ₃ and ATT ₄
is the attenuator control circuit that controls these
Since AC ₁ and AC ₂ are in an inactive state, the received signal from the tuner pack TP is transmitted as it is to the output portions of the tone switching circuits TC ₁ and TC ₂ without attenuating it in any way.

Next, the case where the talk mode is set during tape playback or radio operation as described above will be explained. That is, this is achieved by operating the aforementioned talk operator 18 and setting the talk switches S ₂ a to S ₂ c interlocked therewith to the [ON] side.

First, during tape playback, the magnetic head H
The playback output from _L and H _R is the talk switch S ₂ a,
By passing through the resistors R ₁ and R ₂ inserted in the S ₂ b section, the signal is attenuated by a predetermined amount and is supplied to the preamplifiers PA ₁ and PA ₂ . At the same time, the power supply voltage from the ripple filter LF ₁ mentioned above is supplied as a bias voltage to the built-in electrostatic microphone MIC via the talk switch S ₂ c, so that the microphone MIC is activated. As a result, it produces an output that accommodates surrounding sounds. The built-in microphone output is given the required low-frequency cut characteristics etc. via the filter circuit FC, and then is also supplied to the preamplifiers PA ₁ and PA ₂ via the talk switches S ₂ a and S ₂ b.

In other words, from this point forward, the tape playback output and the built-in microphone output are mixedly supplied to the headphone HP, but the tape playback output is attenuated by the resistors R ₁ and R ₂ in this case. Therefore, it can be used as a so-called talk mode with a kind of muting function that allows you to hear your own voice or surrounding sounds from the built-in microphone output while listening to the tape playback output without removing the headphones HP from your ears. It is.

If the tape cassette used in the talk mode during tape playback is a music tape with only accompaniment, such as a so-called karaoke tape, you can input your voice from the built-in microphone MIC (this may also be an external microphone). It is very convenient because you can use it to practice singing. Of course, the tape used can also be used for language practice or musical instrument practice.

Also, when the radio is in talk mode, the built-in microphone output is supplied to the preamplifiers PA ₁ and PA ₂ in the same way as described above, but the received signal from the tuner pack TP is in this case transmitted to the attenuators ATT ₃ and ATT ₄ . It is supplied to the output sections of the tone switching circuits TC ₁ and TC ₂ with an attenuation effect.

That is, in this case, the power supply voltage is also supplied to the attenuator control circuits AC ₁ and AC 2 from the talk switch S ₂ c section, so that the attenuator control circuits AC ₁ and _{AC 2 become} operational and the attenuator ATT is activated. ₃ and ATT ₄ to produce a damping effect. Here, the attenuator control circuits AC ₁ and AC ₂ are electronic switches such as transistors, and are turned on by the power supply voltage applied to their bases to control the attenuators ATT ₃ and ATT ₄ connected to the collector-emitter path. The attenuation effect is produced by inserting a resistor or the like into the transmission path of the received signal.

As a result, the received signal of the FM broadcast from the Tuner Pack TP is attenuated, so it can be heard on the headphone in the same way as when playing back the tape mentioned above.
You can create a talk mode with a kind of muting so that you can hear your own voice or surrounding sounds from the built-in microphone MIC without removing the HP.

In addition, in the above, the tuner pack was used exclusively for FM, but it can also be used exclusively for AM or FM-AM.
It goes without saying that it may be used for both purposes, and that various other modifications and applications are possible without departing from the gist of the invention.

Therefore, as described in detail above, by configuring the radio operation mode side of the function switch that switches between the tape playback mode and the radio operation mode to also function as a pause function during the tape playback mode, the tape recorder and radio reception can be improved. It is possible to provide an extremely good operating device for a tape recorder that contributes to simplifying the configuration and making it smaller (thinner) when used in combination with a tape recorder.

[Brief explanation of the drawing]

1 and 2 are external perspective views of a tape recorder and a tuner unit applied to an embodiment of the tape recorder operating device according to the invention, and FIG.
The figure is also a configuration explanatory diagram showing the electric circuit system. S ₀ ...Function switch, M...Tape drive motor, Vcc...Power line, LED ₁ ...
(For radio mode or pause function display) Light emitting diode, TR...tape recorder section (electrical circuit system), TP... tuner pack section (electrical circuit system).

Claims (1)

[Scope of utility model registration request] A normal tape cassette and a tuner unit having substantially the same shape as the normal tape cassette are selectively installed in the cassette storage section, and when the normal tape cassette is installed in the tape operation mode and the tuner unit is installed. It has a function switch that is selectively set to the tuner operation mode, and the tuner operation mode side of the function switch also serves as a pause function in the tape operation mode setting state when the tape cassette set is attached. An operating device for a tape recorder, characterized in that: