JPS5813978B2 - Tape recorder recording switching mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a first recording operation function that puts one of two tracks into a recording state and the other one into a playback state, and a second recording operation that puts both tracks into a recording state. function,
The present invention relates to a recording switching mechanism for a tape recorder in which both trunks are in a recording state and one track is provided with a third recording operation function for recording a control signal having an effect such as stopping the running of the tape.

To explain each of the above-mentioned recording operation functions in detail, the first recording operation function is a language practice function, in which the practitioner records his or her own voice on the other track while listening to the teacher's voice. .

The second recording operation function is a general-purpose function, and left and right signals obtained from, for example, microphones are recorded on both tracks.

The third recording operation function is a learning function, and unlike language practice, this learning function involves recording problems such as mathematics and science on tape, and having the learner answer the questions without playing them back.

Therefore, it is necessary to temporarily stop the running of the tape after the question is played back, and a control signal for such a stopping operation is recorded on a track different from the track on which the question is recorded.

The present invention aims to provide a recording switching mechanism suitable for a tape recorder having the above-mentioned three different recording operation functions, and will be described below with reference to the drawings.

The drawings are all plan views of the main parts of the switching mechanism of the present invention,
Each shows a different operating state.

In the figure, reference numeral 1 denotes a first switching lever that is slidably attached to a fixed board 2, and is biased in the direction of arrow A by a spring 3, and a first spring that switches a first switching switch 4 that switches the recording function. Means 5 is fixed.

Reference numeral 6 denotes a second switching lever that is slidably attached to the fixed base plate 2, to which a second spring means 8 for switching the second switching switch 7 is fixed, and a second switching lever 6 that is attached to the first switching lever 1 is attached. A contact portion 10 that contacts the contact piece 9 is formed.

Reference numeral 11 denotes a third switching lever slidably attached to the fixed base plate 2, and a third spring means 13 for switching the third switching switch 12 is fixed and formed on the second switching lever 6. An abutment piece 14 is provided which still abuts the abutment portion 10.

15, 16 and 17 are respectively displaced when push buttons (not shown) are operated, and the first, second and third switching levers 1, 6.
11 in the direction of arrow B.

Reference numeral 18 denotes an erroneous erasure prevention member that detects the presence or absence of an erroneous erasure prevention claw formed at the rear end of the cassette l- (not shown) and moves. It has the effect of preventing displacement of the second switching lever 6 in the direction of arrow B when there is no such switching lever.

The switching mechanism of the present invention is constructed as described above, and its operation will be explained next.

Figure 1 shows the first, second and third switching levers 1, 6 and 11.
are all in the inactive position, and regeneration takes place in this state.

When a recording switching operation for language practice is performed in this state, the first switching lever 1 is displaced by the first operating piece 15 in the direction of arrow B against the biasing force of the spring 3.

As a result, the first spring means 5 comes into contact with the switch 19 of the first changeover switch 4, and the first changeover switch 4 is switched to the recording side to enter the language practice state shown in FIG.

That is, in this state, only the practice track is in the recording state, and the practitioner can record his or her own voice while listening to the teacher's voice.

Next, when a recording switching operation for general-purpose use is performed, the second switching lever 6 is moved in the direction of arrow B by the second operation piece 16, but in this case, the contact portion 10 formed on the switching lever 6 is The first switching lever 1 comes into contact with the contact piece 9 provided on the first switching lever 1 and displaces the first switching lever 1 in the direction of arrow B.

As a result, the first spring means 5 and the second spring means 8 are
It comes into contact with the switches 19 and 20 of the second changeover switches 4 and 7, and switches the first and second changeover switches 4 and 7 to the recording side, resulting in the recording state for general use shown in FIG.

That is, in this state, left and right signals obtained from microphones etc. are recorded on both tracks.

Further, such a recording operation is possible because the displacement prevention by the error prevention member 18 is released only when a cassette whose erroneous erasure prevention claw has not been removed is mounted.

Next, when the recording switching operation for learning use is performed, the third switching lever 11 is displaced in the direction of arrow B by the third switching operation piece 17, but in this case, the abutment piece 14 provided on the switching lever 11 is The second switching lever 6 is brought into contact with the abutting portion 10 formed on the first switching lever 6, and the second switching lever 6 is displaced in the direction of arrow B. 10 abuts, the first switching lever 1 is also displaced in the direction of arrow B.

As a result, the first spring means 5, the second spring means 8 and the third spring means 13 are connected to the first, second and third changeover switches 4, 7, respectively.
．． 12 switches 19, 20, and 21, the first, second, and third changeover switches 4, 7, and 12 are switched to the recording side, and the learning use recording state shown in FIG. 4 is entered.

That is, in this state, problems such as arithmetic are recorded by a microphone on one track, and control signals for operations such as stopping tape running are recorded on the other track.

In addition, since such switching operation is controlled by the presence or absence of the erroneous erasure prevention claw as in the above-mentioned general-purpose use, valuable questions recorded on the teaching tape will not be erroneously erased.

In addition, the first and second
The return of the third switching levers L6, 11 to the non-operating position is carried out by the spring 3 which biases the first switching lever 1.

As explained above, in the recording switching mechanism of the present invention, when the first switching lever is displaced by the first recording operation, the recording switching mechanism of the present invention
Configure the first recording state by changing only the selector switch,
When the second switching lever is displaced by the second recording operation, the first switching lever is moved in conjunction and the second switching switch and the first switching switch are switched to configure the second recording state, and the third switching state is established. When the third switching lever is displaced by the recording operation, the second switching lever and the first switching lever are also moved in conjunction with each other to switch the third switching switch, the second switching switch, and the first switching switch, and the third recording state is achieved. In other words, each recording operation state is configured by a combination of three changeover switches, so each recording operation can be performed by providing a changeover switch corresponding to each recording operation and switching only that switch. This has the advantage that the number of contacts of the switch can be reduced compared to the case of configuring the operating state, and therefore wiring mistakes and soldering mistakes can be minimized.

Further, the present invention not only associates the first, second, and third switching levers so as to displace them in conjunction with each other, but also detects the presence or absence of a claw for preventing accidental erasure provided at the rear end of the cassette.
Since the switching sliding displacement of the third switching lever is controlled via the second switching lever by the erroneous erasure prevention member that controls the switching sliding displacement of the switching lever, it is possible to perform the recording operation with a simple configuration. It has the feature that the control can be carried out reliably and easily.

[Brief explanation of drawings]

The drawings all relate to the recording switching mechanism of the present invention, and FIG. 1, FIG. 2, FIG. 3, and FIG. 4 are plan views of essential parts showing different states, respectively. Explanation of main figure numbers, 1...First switching lever, 4.
...First changeover switch, 6...Second changeover lever, 7...Second changeover switch, 11...
... Third changeover lever, 12 ... Third changeover switch, 18 ... Erroneous erasure prevention member.

Claims (1)

[Claims] 1. In a tape recorder equipped with first, second, and third different recording operation functions, the first, second, and third changeover switches for switching the recording function, and the first switch that slides and changes depending on the first recording operation. a first changeover lever for changing over a changeover switch; a second changeover lever provided with means for slidingly displacing in response to a second recording operation to change over the second changeover switch and interlockingly displace the first changeover lever; 3
a third switching lever provided with a means for slidingly displacing the recording operation to switch the third switching switch and interlockingly displacing the second switching lever; and a third switching lever provided at the rear end of the cassette to prevent accidental erasure. It is comprised of an erroneous erasure prevention member that detects the presence or absence of a claw and controls the sliding displacement operation of the second switching lever, and switches the first switching switch by displacement of the first switching lever during a first recording operation; Second
During the recording operation, the second changeover switch and the first changeover switch are switched by the displacement of the second changeover lever and the interlocking displacement of the first changeover lever, and during the third recording operation, the displacement of the third changeover lever and the interlocking displacement of the second changeover lever and the first changeover switch are changed. The third changeover switch, the second changeover switch, and the first changeover switch are changed by the interlocking displacement of the first changeover lever, and the changeover operation of the second changeover lever and the third changeover lever is controlled by the accidental erasure prevention member. A recording switching mechanism for a tape recorder characterized by the following.