JPH0619871B2 - Information reproduction or information recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention detects the presence or absence of a playback or recording medium mounted in a playback or recording device body, and selects an operation mode such as play, fast-forward, stop, etc. in the absence of the playback or recording medium. A cassette tape recorder, record player, C
The present invention relates to an information reproducing or information recording device such as a D or video disc.

Generally, such an information reproducing or information recording apparatus is configured so that a desired operation mode can be set by operating an operation button for selecting an operation mode such as play, fast-forward, stop, and eject.

When the reproducing or recording device is used, the reproducing or recording medium is attached to the main body of the device to perform a reproducing or recording operation.However, when the reproducing or recording medium is attached to the main body of the device, an operation button having an eject function is required. Is performed.

However, the operation button for the eject function is usually provided in a relatively unrecognizable place as compared with the operation button for selecting another operation mode, and the operation is complicated for beginners and the like. , That measure was desired.

The present invention aims to correct the above drawbacks, and an object of the present invention is to provide a reproducing or recording apparatus capable of rationally operating the eject function.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an electric circuit diagram in which the information reproducing or information recording apparatus of the present invention is applied to a cassette tape recorder, and 1 is a tape cassette (not shown) as a reproducing or recording medium mounted on a cassette tape recorder main body. Is a detection means disposed so as to be able to detect that the light is emitted from the light emitting element 11 when the tape cassette is not attached to the main body and is composed of a pair of optical elements including the light emitting element 11 and the light receiving element 12. It is designed to be incident on.

In the cassette tape recorder, the location of the detecting means 1 is in the kangaroo pocket type in the kangaroo pocket type, and in the type in which the tape cassette is directly attached to the cassette tape recorder main body. The kangaroo pocket and the cassette door can be ejected by an eject operation in any case. Each of the light emitting element 11 and the light receiving element 12 of the detecting means 1 is connected so that one end is connected to the power supply + Vcc via a resistor and the other end is grounded. The base of the transistor Tr ₁ is connected to the hot side of the light receiving element 12 via a resistor, and the collector of the transistor Tr ₁ is connected to the power source + Vcc via the switch 21 and the resistor and the transistor Tr ₁ via the resistor. It is input to the base of ₂ . The transistor Tr ₂ has its emitter grounded and its collector connected to the eject input terminal of the control circuit 4 and also connected to the power source + Vcc via a resistor. Reference numeral 2 is a group of operation buttons for selecting operation modes such as play, fast-forward, and stop, and non-lock type switches 21, 22 ... Corresponding to the respective operation modes.
2N, and these switches 21, 22 ... 2
N has one end connected to the collector of the transistor Tr _{1 and} the other end connected to the input terminal of the control circuit 4 and also connected to the power supply + Vcc via a resistor. Reference numeral 3 denotes an operation button having an eject function, which is composed of a non-lock type switch whose one end is connected to the collector of the transistor Tr _{2 and} whose other end is grounded. The control circuit 4 is composed of a logic circuit such as a flip-flop circuit or a latch circuit provided for each input terminal. The input terminal always receives an H level input signal from the power supply + Vcc, and the operation button group 2 When an L level input is made by operating the switches 21, 22 ... 2N and the operation button 3,
A control signal is sent to the corresponding output terminal. A drive circuit (not shown) for driving the mechanism of the tape recorder and a switching circuit (not shown) for switching various electric circuits are connected to the output terminal of the control circuit 4,
It is configured so that an operation corresponding to a desired operation can be performed.

Next, the operation will be described based on the above circuit. First, when the tape cassette is mounted, the light emitting element 1
Since the light of No. 1 is not transmitted to the light receiving element 12, the transistor Tr ₁ is turned on and the transistor Tr ₂ is turned off. Therefore, the switches 21, 22, ... 2N and the eject of the operation button group 2 for instructing each operation mode are ejected. The switch of the function operation button 3 can control the control circuit 4 in an independent mode.

Next, when the tape cassette is not installed, the light of the light emitting element 11 is not blocked by the tape cassette.
The light-receiving element 12 is turned on, which turns off the transistor Tr ₁ , and in this state,
When the switches 21, 22, ... 2N of the operation button group 2 for instructing the operation mode of each function are operated, a bias voltage is applied to the transistor Tr ₂ to turn it on,
The L level is input to the input terminal of the control circuit 4 connected to the collector, and the eject control output is sent to the output terminal of the control circuit 4 regardless of the operation of the operation button 3 having the eject function, and the eject mode is set. Done. In this case, the eject mode is naturally set by operating the operation button 3 having the eject function regardless of the operation of the operation button group 2.

FIG. 2 shows a selection mode table when the switches 21, 22, 2N and 3 are turned on.

In FIG. 2, for example, when the cassette 21 is provided and the switch 21 is turned on, the signal levels of the respective input terminals of the control circuit 4 are as follows: input 1 = L, input 2 = H, input N = H, input 3
= H, the control circuit 4 selects and outputs the mode 21 corresponding to the input 1 having the signal level L. on the other hand,
When there is no cassette, when the switch 21 is turned on, the signal level of each input terminal of the control circuit 4 becomes input 1 = H, input 2 = H, input N = H, input 3 = L, and the control circuit 4 outputs the signal level. The eject corresponding to the input 3 which is L is selected and output.

In the above embodiment, when the tape cassette is not loaded, all the operation buttons for instructing the operation mode are set to the eject mode at the input side of the control circuit. The operation mode signal sent to the output side of the control circuit may be recognized as an eject signal by the signal of the detection means for detecting the. Further, although the eject mode is driven by an electric signal, the same can be applied to the one in which the eject operation is input, such as when ejecting only the cassette door in which the cassette tape is not housed. Is. Further, the detection of the tape cassette is detected by the optical element, but this may be performed by mechanical detection means such as a microswitch, magnetic or electrostatic detection means.

Further, although the above-mentioned embodiment is applied to the cassette tape recorder, in addition to this, a record player,
The present invention can be applied to a reproducing or recording device having an eject function such as a CD player, a video tape recorder, and a video disc player. In this case, a reproduction board, a video tape, a video disc, etc. are used as a reproducing or recording medium. Will be there.

As described above, the present invention, as described above, has a detection means arranged to detect whether or not a reproduction or recording medium is attached, an operation button for instructing selection of an operation mode such as play, fast-forward, stop, etc., and an eject function having an eject function. An operation button and a reproducing or recording medium (cassette) by the detecting means.
When it is detected that the is installed, the operation buttons for instructing the operation mode are configured to have the eject function, so all the operation buttons including the operation button for selecting the operation mode have the eject function. Having, it can greatly improve its operability, even if a beginner or the like operates the mode operation button, it is ejected and stands by, and it is possible to imply the next step of mounting the playback or recording medium, It is possible to expect a very useful effect.

Further, according to the present invention, all the operation buttons are switched so as to function as the eject button when the recording medium is not mounted in the recording medium mounting mechanism. Therefore, when the power button has the eject function. As described above, the recording medium loading mechanism does not open each time when the power is turned on, and even if the user mistakenly thinks that it is a failure or does not intend to use the information reproducing or information recording device, the recording medium Since the loading mechanism is opened, the problem that the recording medium loading mechanism has to be closed each time can be eliminated.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an operation mode in the embodiment of FIG. 1 ... Detection means, 2 ... Operation button group, 3 ... Eject operation button, 4 ... Control circuit.

Claims (1)

[Claims] 1. A recording medium mounting mechanism for mounting, accommodating and holding a recording medium, a recording medium detecting means for detecting mounting / non-mounting of the recording medium to / from the recording medium mounting mechanism, and a recording medium mounting mechanism. An eject button for instructing the ejection of the recording medium, a recording medium ejecting means for ejecting the recording medium by opening the recording medium loading mechanism when an eject command is received, and a predetermined operation mode such as play, fast forward, rewind, stop, etc. A plurality of operation buttons other than the eject button for selecting, and a button function switch for switching all of the operation buttons to function as an eject button when the recording medium detection unit detects non-attachment of the recording medium. An information reproducing or information recording apparatus comprising: