JPH0437301Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a magnetic recording and reproducing device.

(Prior Art) Conventionally commonly used magnetic recording and reproducing devices are equipped with a switch that is turned on and off by a claw provided on the cassette case to prevent accidental erasure, and an accidental erasure prevention mechanism operated by this switch. If the claw provided on the cassette case is broken, the switch is turned on and the recording device is prevented from entering the recording state by an erroneous erasure prevention mechanism.

(Problem to be solved by the invention) However, in the conventional magnetic recording/reproducing device described above, even if a cassette case with a broken claw is stored in the storage section and a predetermined button is operated to enter the recording state, the cassette case is simply turned off. It was simply a matter of preventing it from becoming a recording state. For this reason, the user has the disadvantage that the reason why the device does not work is unclear, and the cassette case must be removed from the storage section, making it inconvenient to use.

In addition, if the recording device is operated while a cassette case with a broken claw is stored, the cassette case will be automatically removed.
There is something shown in Utility Model Publication No. 51-7085,
This method achieves the above operation through mechanical means, and the addition of mechanical parts not only increases the cost, but also requires changes to the design of the entire mechanism, making it impractical. There was a lack of resources.

(Means for Solving the Problems) The present invention aims to eliminate the drawbacks of the conventional device described above, and is operated so that a cassette case with a broken claw is stored in a storage section and enters a recording state. In order to automatically remove the cassette case from the storage section when the cassette case is stored in a magnetic recording/reproducing device that performs recording and playback, a recording signal is sent to put the device into a recording state. a first input terminal to which an input is input; a second input terminal to which an eject signal for operating the device to eject a cassette is input; a first output terminal connected to a circuit that puts the device in a recording state; a recording switch inserted between the first input terminal and the first output terminal and operated to start recording operation; an eject switch inserted between the second input terminal and the second output terminal and operated to eject the cassette case; a detection signal for detecting the presence or absence of a claw provided on the cassette case to prevent accidental erasure; It is switched by the output of the detection means, and when the cassette case does not have a claw for preventing accidental erasure, the recording switch is released from between the first input terminal and the first output terminal, and the recording switch is also opened. A changeover switch is provided between the second input terminal and the second output terminal in parallel with the takeout switch.

(Example) The present invention will be described below according to the example shown in FIGS. 1 and 2. First, in FIG. 1, reference numeral 1 denotes an input terminal into which a recording signal for putting the apparatus into a recording state is input, and input terminals 2 denote input terminals 3 and 4 into which an eject signal for operating the apparatus to eject a cassette is input.
is operated by a switch (not shown) that is turned on and off depending on the presence or absence of a claw (not shown) provided on the cassette case, and is a first changeover switch that selects the signal input from each of the terminals 1 and 2. and a second changeover switch; 7 is a recording switch that is provided on the cabinet surface and is operated when starting a recording operation; 8 is a take-out switch that is provided on the cabinet surface like the recording switch 7 and is operated when the cassette case is taken out; 9 is a switch that controls the device. An output terminal 10 outputs a recording signal to a circuit (not shown) for setting the device in a recording state, and an output terminal 10 outputs an eject signal to a circuit (not shown) for removing a cassette case from the apparatus.

Note that the configurations other than the changeover switches 3 and 4 described above are those that are standardly provided in conventional magnetic recording and reproducing apparatuses.

In the magnetic recording and reproducing apparatus configured as described above, first, a cassette storage section (not shown) is installed.
If a cassette case with claws is stored in the
The first and second changeover switches 3 and 4 are in the state shown by solid lines, and pulsed recording signals and take-out signals are input to each input terminal 1 and 2 as necessary. When the recording switch is pressed and closed in this state, the recording signal input from the input terminal 1 is outputted to the output terminal 9 via the first changeover switch 3, the recording switch 7, and the second changeover switch 4, and is sent to the next stage. A provided circuit (not shown) places the device in a recording state. On the other hand, when a cassette case with a broken claw is stored in the cassette storage section, the first and second switches 3 and 4 are in the state shown by the dashed line. When the recording switch 7 is pressed and closed in this state, a take-out signal is outputted from the input terminal 2 via the first changeover switch 3, the recording switch 7, and the second changeover switch 4 to the output terminal 10, and is output to the output terminal 10, which is installed in the next stage. (not shown) to perform the cassette ejecting operation. Incidentally, when the cassette eject switch 8 is operated, the device performs the cassette eject operation regardless of the presence or absence of the claw.

Next, FIG. 2 shows another embodiment using a logic circuit. In FIG. 2, 11 is an input terminal to which a recording signal for putting the apparatus into a recording state is input, 12 is an input terminal to which a cassette eject signal for operating the apparatus to eject a cassette is input;
3 is a claw provided on the cassette case (not shown)
an input terminal to which an operating signal from a switch (not shown) is input, which is turned on or off depending on the presence or absence of the switch;
4 is a not gate that inverts the presence or absence of a signal; 15
1 to 18 are first to fourth AND gates that output signals only when inputs are received to all input terminals;
19 and 20 are diodes that regulate the flow of signals; 21 is a recording switch that is operated at the start of recording; 22 is an ejection switch that is operated when the cassette case is removed; and 23 is a circuit (not shown) that puts the device into a recording state. Output terminal for outputting recording signals, 2
Reference numeral 4 designates a terminal for outputting an eject signal to a circuit (not shown) for operating the device for ejecting a cassette.

In the magnetic recording and reproducing apparatus configured as described above, first, a cassette storage section (not shown) is installed.
If a cassette case with claws is stored in the
The switch, which is turned on and off by the claw, is turned off and an "L" signal is input to the input terminal 13, and this signal is input to the second and fourth AND gates 16 and 18, as well as to the NOT gate 14.
The signal is exchanged to an "H" signal, output, and input to the first and third AND gates 15 and 17. Therefore, there is no output from the second and fourth AND gates 16 and 18 to which the "L" signal is input. On the other hand, a first AND gate 1 to which an “H” signal is input.
5 outputs an "H" signal in response to a recording signal input from the input terminal 11 as needed, and when the recording switch 21 is closed during recording, the recording signal is sent to the output terminal via the third AND gate 17. The signal is output, and a circuit (not shown) provided at the next stage causes the device to enter a recording state. Next, when a cassette case with a broken claw is stored in the cassette storage section, the switch that is turned on and off by the claw is turned on, and an "H" signal is input to the input terminal 13, and this signal is 2 and 4th AND gate 1
6 and 18 as well as not gate 14, which is converted to an "L" signal, output, and input to first and third AND gates 15 and 17. Therefore, there is no output from the first and third AND gates 15 and 17 to which the "L" signal is input, and the apparatus does not enter the recording state. On the other hand, “H”
The second AND gate 16, to which the signal is input, outputs an "H" signal in response to the take-out signal input from the input terminal 12 as necessary, and if a cassette case with a broken nail is stored. Nevertheless,
When the recording switch 21 is closed, the eject signal is outputted to the output terminal 24 via the fourth AND gate 18, and a circuit (not shown) provided at the next stage causes the device to eject the cassette.

Therefore, in the magnetic recording/reproducing device of the above embodiment, even if the cassette case with the broken claw is stored in the storage portion, if the device is operated to enter the recording state, the storage portion will be removed. Since the cassette case is automatically taken out, the user can easily confirm that the cassette case has a broken claw, and there is no need to take the cassette case out of the storage compartment again. It is.

(Effect of the invention) As described above, according to the invention, when a recording operation is performed while a cassette case without an accidental erasure prevention claw is stored, the cassette case is automatically taken out from the storage section. Therefore, the user can easily confirm that the cassette case has a broken claw, and there is no need to take it out from the storage section, which is convenient.

Further, the present invention is highly practical as it can be implemented by only slightly modifying a part of the electric circuit of a conventional magnetic recording/reproducing device.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of the main parts of one embodiment of the device of the present invention, and FIG. 2 is a circuit diagram of the main parts of another embodiment of the device of the present invention. 3, 4...changeover switch, 7,21...recording switch, 15-18...and gate.

Claims (1)

[Scope of Claim for Utility Model Registration] In a magnetic recording and reproducing device that performs recording and reproducing in which a cassette case is housed, a first input terminal to which a recording signal is inputted to put the device in a recording state, and an operation for ejecting the cassette from the device. a second input terminal into which an eject signal is input to cause the device to eject the cassette case, a first output terminal connected to a circuit that puts the device into a recording state, and a second output terminal connected to a circuit that causes the device to eject a cassette case. a recording switch inserted between the first input terminal and the first output terminal and operated to start recording operation; and a recording switch inserted between the second input terminal and the second output terminal. an eject switch that is operated to take out the inserted cassette tape; a detection means that detects the presence or absence of a claw provided on the cassette case to prevent accidental erasure; and a detection means that is switched by the output of the detection means, When there is no erasure prevention claw, the recording switch is released between the first input terminal and the first output terminal, and the recording switch is opened between the second input terminal and the second output terminal. a changeover switch inserted in parallel with the takeout switch;
A magnetic recording and reproducing device equipped with.