JPS6142321B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic sheet type recording and reproducing machine which has a spiral track on a magnetic sheet and performs recording and reproduction by a magnetic head that scans the track.

Conventionally, in this type of conventional magnetic sheet type recording and reproducing machine, the magnetic head moves from the outer periphery of the magnetic sheet to the center, and then the recording and reproducing of one magnetic sheet is completed. Therefore, 1
There is little information that can be recorded and played back on a single magnetic sheet.
Therefore, there was a request to extend the recording and playback time.

However, there are already hundreds of thousands of such magnetic sheet type recording and playback machines on the market, so it is difficult to ignore the systems and mechanisms of conventional machines and try to extend the recording and playback time due to the magnetic sheet software. There is a problem in that it makes the software incompatible and causes confusion in the entire market as a result.

Therefore, the inventor of the present invention retained one spiral track in the conventional magnetic sheet recording/reproducing system, added another spiral track between these tracks, and thereby formed a magnetic sheet. The two-track track will be made available for round-trip transportation.
We have already invented a magnetic sheet type recording/playback machine that extends the recording and playback time while preserving compatibility with the software of the magnetic sheet in conventional machines, and we are currently applying for it (Patent Application No. 19699, 1983). It is. First, this conventional example will be explained with reference to FIGS. 1 to 3.

FIG. 1 is a perspective view of a conventional magnetic sheet recording and reproducing machine, with the magnetic sheet removed. Reference numeral 1 in the figure is the main body, and a magnetic sheet 2 as shown in FIG. 2, for example, is placed on the main body 1 with its magnetic surface facing downward. As can be seen from the plan view shown in FIG. 2B, this magnetic sheet 2 consists of a sheet base surface 2a and a magnetic surface 2b formed on the top surface of the sheet base surface 2a. And on the magnetic surface 2b,
A spiral track _t1 running from the outer circumference to the inner circumference and another spiral track _t2 running from the inner circumference to the outer circumference between them are formed in two lines. There are two alignment holes 3 and 4 on the top of this sheet 2, and one alignment hole on the bottom.
Two alignment holes 5 are drilled, and when this magnetic sheet 2 is placed on the main body 1, the alignment holes 3, 4,
5 are alignment pins 6 provided on the top surface of the main body 1, respectively.
7 and 8, and the magnetic sheet 2 on the main body 1
The location of A magnetic sheet pressing plate 9 is placed on this magnetic sheet 2,
To prevent the magnetic sheet 2 from floating up. The upper edge of the magnetic sheet press plate 9 is attached to the upper edge of the main body 1 via hinges 10 and 11, and can be opened and closed using the upper edge as a fulcrum.

There is a large circular hole 12 in the center of the upper surface of the main body 1 of such a recording/reproducing device, and a turntable 13 is rotatably held at the bottom of this circular hole 12 with the center exactly aligned with the circular hole 12. . At the center of this turntable 13 is a helical gear 14. This helical gear 14 is connected to a shaft fixed to the bottom of the main body 1 through a hole bored in the center of the turntable. This helical gear 14 meshes with a helical gear 16 provided at one end of the feed screw 15. The feed screw 15 is installed radially on the turntable 13 and supported at both ends. This feed screw 15 holds a magnetic head 17 that moves on the feed screw as the feed screw 15 rotates. Therefore, when the turntable 13 rotates, the feed screw 15 mounted on the turntable engages with the fixed helical gear 14 and rotates by itself, moving the magnetic head 17 along the feed screw 15. let This magnetic head 17 is connected to the magnetic sheet 2
and moves on its tracks t ₁ and t ₂ . That is, the rotation of the motor (see FIG. 3) 28 is transmitted to the turntable 13, and the feed screw 15 on the turntable is rotated by the helical gear 16 at its tip.
As a result, it rotates around the fixed helical gear 14 while being rotated by itself. That is, the magnetic head 17, which revolves and is initially located at the outer circumference, moves from the outer circumference to the inner circumference through the spiral track _t1 .
Then, at the innermost circumferential position, it comes into contact with the motor reversing switch 18 of the magnetic head reciprocating mechanism P to reverse the rotation of the motor. This motor reverse switch 18
is interlocked with the track changeover switch 20 of the track changeover mechanism T by the connecting rod 19, so that the used track is switched from _t1 to _t2 at the same time as the motor is reversed. Therefore, the magnetic head 17 passes over the track _t2 and now moves from the inner circumference to the outer circumference. And the magnetic head 17 is
At the outermost circumferential position, it contacts the one-cycle stop switch 21 and stops the rotation of the motor. If the repeat switch 24 is ON, the magnetic head 17 contacts the track changeover switch 20 to change the used track back from _t2 to _t1 . At this time,
Since the track changeover switch 20 is interlocked with the motor reversing switch 18, the motor is also reversed again.
Therefore, the magnetic head 17 passes through the track _t1 again from the outer circumference to the inner circumference, and the recording and reproduction are repeated.

In FIG. 1, reference numeral 22 is a speaker, reference numeral 23 is a start, stop, and fast forward operation switch, and reference numeral 24 is a repeat switch. When performing a repeat operation as described above, this repeat switch is turned on.

FIG. 3 shows a magnetic head reciprocating mechanism P and a track switching mechanism T in the recording/reproducing machine shown in FIG.
FIG. 2 is a detailed mechanism explanatory diagram. FIG. 3 shows a state in which the magnetic head 17 is at the start (outer periphery) position. In this state, the magnetic head 17 pushes the track changeover switch 20 of the track changeover mechanism T, bringing the changeover switch 20 into contact with the contact 25. Therefore, the track t ₁ of the magnetic head 17
Core C ₁ is in use. Since the track changeover switch 20 is linked with the motor reversal switch 18 of the magnetic head reciprocating mechanism P by the connecting rod 19 as described above, the motor reversal switch 18 is connected to the contact point 2.
Contact with 6,27. Therefore, the motor 28 rotates in the forward direction, and the magnetic head 17 moves from the outer circumference to the inner circumference, and at this time, the magnetic sheet 2
Recording and playback is performed on track _t1 . When the magnetic head 17 reaches the innermost circumferential position, it comes into contact with the motor reverse switch 18 and presses the switch to bring it into contact with the contacts 29 and 30. Therefore, the motor 28 rotates in the opposite direction, and the magnetic head 17 moves from the inner circumference to the outer circumference. At this time, the track changeover switch 20, which is interlocked with the motor reversing switch 18, comes into contact with the contact 31, so that the core for the track _t2 of the magnetic head 17 is
Track _c2 becomes in use, and recording and playback is performed on this track _t2 . In addition, in FIG. 3, the reference numeral 32 indicates a power supply, and the reference numeral 33 indicates a power switch. Further, 34 is a one-cycle stop and repeat circuit.
Reference numeral 35 denotes an amplifier which amplifies the track output of the magnetic head 17 and sends it to the speaker 22. 36 is
This is a terminal board for magnetic head leads. When a magnetic sheet with only one spiral track, which is used in a conventional system as shown in Fig. 9, is applied to such a magnetic sheet type recording/playing device and played back, the magnetic head is moved from the outer periphery to the farthest end. When the magnetic head is moving toward the inner circumference, the information recorded on the track of the magnetic sheet is reproduced, but when the magnetic head is at the innermost circumference position, the magnetic head reciprocating mechanism P and the track switching mechanism T are activated.
When the magnetic head moves from the innermost circumference to the outer circumference, the unrecorded area, that is, the unused track, is played back, and the magnetic sheet type recording/reproducing machine is activated. There was a problem in that there was no sound for half the time, giving the user an extremely unpleasant feeling and a loss of time.

The purpose of the present invention is to solve the above-mentioned problems of the conventional example by creating a spiral track so that it can be determined whether a magnetic sheet has one or two spiral tracks that can be recorded or reproduced. When there are two strips and the magnetic sheet is used for reciprocating, a notch can be provided in a part of the magnetic sheet, and a sheet notch is provided for detecting the presence or absence of this notch in the magnetic sheet type recording/reproducing machine. A detection switch is provided, and this sheet notch detection switch detects when the magnetic sheet has only one spiral track, or when there are two spiral tracks but only the forward side is desired to be recorded or played back, the magnetic head is set to the innermost position. When the circumferential position is reached, the magnetic head is returned to the initial position, that is, the outermost circumferential position, at high speed while performing reproducing muting.
In addition, when two tracks are provided on the magnetic sheet and the track is to be recorded and played back and forth, the magnetic sheet type recording and playback machine is controlled to switch tracks and record and play back and forth. In addition to preventing time loss when reproducing a magnetic sheet with only one track in the system, it also eliminates unnecessary operations and worries for the user, and furthermore, when used in a learning device, it is possible to skip learning. It is an object of the present invention to provide a magnetic sheet type recording and reproducing machine that allows selection and control of the form in which recording and reproduction can be performed using a magnetic sheet.

Next, an embodiment of the present invention will be described with reference to FIGS. 4 to 8. Note that among the numbers and symbols used in Figures 4 to 8, the same numbers and symbols as those used in Figures 1 to 3 represent the same mechanisms and functions, so their explanations will be omitted. Omitted. FIG. 4 is a perspective view of the magnetic sheet type recording and reproducing machine according to the present invention, with the magnetic sheet removed. In the figure, 38 is an operating rod that engages with the seat notch detection switch,
This is to detect whether there is a notch 0 formed in the magnetic sheet of the present invention shown in FIGS. 5 and 6, and when the magnetic sheet is set in the main body, It is provided at a position corresponding to the notch. FIGS. 7A and 7B are diagrams showing the detailed structure of this sheet notch detection switch.
This is constituted by a switch, such as a feather touch leaf-shaped switch or a micro switch, which prevents the magnetic sheet from being damaged by the elastic force of the return spring 39 of the operating rod 38. and,
The magnetic sheet 2 is the main body 1 of the magnetic sheet type recording/playback machine.
When set between the magnetic sheet and the sheet holding plate 9, if the magnetic sheet does not have a notch 0 as shown in FIG. 5, the operating rod 38 is returned to its original position by the magnetic sheet as shown in FIG. The contacts 37a and 37 are pushed down against the elastic force of the spring 39, as shown in the figure.
b is in the make state, and 37c is in the break state. On the other hand, when the notch 0 exists, the head of the actuating rod 38 is placed inside the presser plate 9 as shown in FIG. 7B. The contacts 37a and 37 of the switch 37 remain protruding into the recess H provided in the switch 37.
The contact 37c is configured to be in a break state, and the contact 37c is in a make state. FIG. 8 is a mechanical explanatory diagram showing the magnetic head reciprocating mechanism and track switching mechanism in the magnetic sheet type recording/reproducing machine of the present invention, and FIG. 8A shows the case where the magnetic sheet has no notch. Moreover, FIG. 8B is a diagram when the magnetic sheet has a notch. The difference from the conventional magnetic sheet type recording and reproducing machine shown in FIG. The motor consists of a regenerative muting mechanism that stops the function of the amplifier 35, a motor speed regulator R, and a motor speed high-speed side switching switch 41 provided on the continuous rod 19 to switch it from the steady speed side to the high speed side. This is due to the addition of a speed switching mechanism. Both mechanisms are connected as shown in FIG. 8 in order to be controlled by a sheet notch detection switch. That is, the amplifier input side short circuit switch 40 and the contact point 37b of the sheet notch detection switch 37 are connected in series to form an AND circuit, and the motor speed high side changeover switch 41 and the contact point 37a of the sheet notch detection switch 37 are connected in series. are connected in series to form an AND circuit, and the amplifier operating switch 42 and the contact 37c of the sheet notch detection switch 37 are connected in parallel to form an OR circuit.

Next, the operation of the magnetic sheet type recording/reproducing machine according to the present invention will be explained based on FIGS. 8A and 8B. First, when there is no notch 0 in the magnetic sheet, that is, a magnetic sheet with only one spiral track used in conventional machine systems, or a magnetic sheet with two reciprocating tracks is used. However, if you want to play only one track on the outgoing side, the system configuration will be as shown in Figure 8A, and the magnetic sheet type recording and reproducing machine will start operating from the position of the magnetic head shown in the diagram, but if the amplifier input side is shorted. Since the motor switch 40 and the motor speed high-speed selector switch 41 are in the open state, and the recording/playback amplifier operation switch 42 is in the closed state, the motor rotates at a steady speed and the amplifier operates normally. Then, the first track _t1 of the magnetic sheet is normally recorded and reproduced. When the magnetic head 17 reaches the innermost circumferential position and comes into contact with the motor reversing switch 18, the direction of rotation of the motor is switched and the connecting rod 19 moves to the innermost circumferential side, thereby shorting the amplifier input. switch 40 and motor speed high-speed side selector switch 41 are closed, and amplifier operation switch 42 is opened, so that the reproduction muting mechanism is activated and the motor 28 is activated while the recording and reproduction amplifier 35 has stopped functioning. Rotate at high speed in the opposite direction. Therefore, the magnetic head 17 is returned to the initial position, ie, the outermost position, at high speed without any sound being emitted from the speaker 22.

On the other hand, when the magnetic sheet has the notch 0, the system configuration becomes as shown in FIG. 8B. That is, the contact point 37 of the sheet notch detection switch 37
Since both a and 37b are in the open state and 37c is in the closed state, the connecting rod 19 moves and the input of the amplifier 35 is closed regardless of the open/closed state of the amplifier input short-circuit switch 40 and the motor speed high-speed side selector switch 41. side is not short-circuited, the speed of the motor remains at steady speed, and the switch 4 for operating the recording/playback amplifier is closed.
Regardless of whether 2 is open or closed, the function of the amplifier is not stopped. Therefore, when the magnetic sheet recording/reproducing machine starts operating from the illustrated position, the first track _t1 of the magnetic sheet is scanned by the first core _c1 of the magnetic head 17, and this track _t1 is recorded and reproduced. Ru. When the magnetic head 17 reaches the innermost position, it comes into contact with the motor reverse switch 18. As a result, the connecting rod 19 is moved to the innermost circumferential side, and the motor is reversed. At the same time, the core used in the magnetic head is also moved from the _c1 side.
c Switch to side ₂ . At this time, the amplifier input short-circuit switch 40, the motor speed high-speed side selector switch 41, and the amplifier operation switch 42 are also switched, but as described above, these switches 40, 41, and 42 are switched by the seat notch detection switch 37. There is no impact from this. And the track of the magnetic sheet
Since the signal has been switched from _t1 to _t2 , this second track _t2 will be normally recorded and played back.

As explained above, by providing a magnetic sheet notch detection switch in the magnetic sheet type recording and reproducing machine and controlling the functional system of the magnetic sheet type recording and reproducing machine, it is possible to It is possible to extend the recording and playback time of the magnetic sheet without compromising software compatibility, and it does not cause any time loss or discomfort to the user even when using the magnetic sheet of the conventional system. . Further, as will be described later, when the magnetic sheet type recording and reproducing machine of the present invention is used in learning equipment, great effects can be obtained. In other words, the structure of the teaching material software to be recorded on a magnetic sheet is divided into classes depending on the level of content, for example, and each is recorded on a separate track, and a perforation etc. is made so as to cut out a part of this magnetic sheet. At first, basic learning materials are presented to the learners, and based on their reactions and evaluations at the end of the presentation, whether they can proceed to another sheet that constitutes the next step, and whether the level of understanding is low and they are unable to proceed to the next step. If it is impossible to proceed or if applied learning is required, create a notch in a part of the sheet using the perforations provided in the sheet and present the recorded teaching material on the second track _t2 . , forcing learners to do unnecessary learning depending on their intelligence and knowledge level,
Alternatively, it is possible to prevent dropouts due to insufficient explanation. In addition, by recording only the questions on the first track _t1 and recording the answers on the second track, if you use this as a self-study material, the supervisor can check whether there are cutouts in the sheet. According to
This has the effect that it is easy to judge whether the learner has seen the correct answer or not, and that good results can be expected in the management and supervision of learning and in the learner's own learning effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional magnetic sheet type recording and reproducing machine, with the magnetic sheet removed. FIG. 2 shows a magnetic sheet used in the magnetic sheet type recording and reproducing machine shown in FIG. 1, with A being a plan view thereof and B being a sectional view thereof. FIG. 3 is a diagram showing a magnetic head reciprocating mechanism and a track switching mechanism in the conventional magnetic sheet type recording and reproducing machine shown in FIG. FIG. 4 is a perspective view of the magnetic sheet type recording and reproducing machine according to the present invention, with the magnetic sheet removed. FIG. 5 shows a magnetic sheet used in the magnetic sheet type recording and reproducing machine of the present invention, A is a plan view thereof, and B is a sectional view thereof. Figure 6 shows
This is an example of a notch provided in a magnetic sheet.
FIG. 7 is a diagram showing the structure of a sheet notch detection switch for detecting the notch shown in FIG. FIG. 8 is a diagram showing the magnetic head reciprocating mechanism and track switching mechanism in the magnetic sheet type recording/reproducing machine of the present invention, A shows the case where the magnetic sheet does not have a notch, and B shows a case where the magnetic sheet has no notch. exists. FIG. 9 is a diagram showing the structure of the magnetic sheet in the conventional machine Mystem. 1...Main body, 2...Magnetic sheet, 3, 4, 5...
... Alignment hole, 6, 7, 8 ... Alignment pin, 9 ... Holding plate, 10, 11 ... Hinge, 12 ... Circular hole, 13
... Turntable, 14 ... Helical gear, 1
5...Feed screw, 16...Helical gear, 17...
...Magnetic head, 18...Motor reverse switch, 1
9... Connection rod, 20... Track changeover switch,
21...One cycle stop switch, 22...Speaker, 23...Operation switch, 24...Repeat switch, 28...Motor, 32...Power supply, 33...
...Power switch, 35...Amplifier, 36...Terminal board, 37...Seat notch detection switch, 38...
...Operating rod, 39... Spring, 40... Recording/playback amplifier input short circuit switch, 41... Motor speed high speed side selector switch, 42... Recording/playback amplifier operation switch, P... Magnetic head reciprocating mechanism, T... ...Track switching mechanism, R...Motor speed regulator.

Claims (1)

[Scope of Claims] 1. A magnetic head that scans a spiral track of a magnetic sheet, and a track scanning switch that switches scanning of the magnetic head from one track to another at the outermost and innermost positions of the spiral track. and magnetic head reciprocating scanning means for scanning a reciprocating track from the outermost circumferential position to the innermost circumferential position of the spiral track by performing a switching operation by the track scanning switching means, a recording/playback detecting means for detecting whether recording/playback is to be performed by only the first forward scan of the reciprocating track by the magnetic head or by scanning the entire track based on a recording/playback mode discriminating unit attached to the magnetic sheet; a reproduction mutating means; and a motor speed switching means; when recording and reproducing only by the forward scanning, the reproduction mutating is inoperative during the forward scanning, the reproduction mutating is operated during the backward scanning, and the motor speed is set to high speed. , a magnetic sheet type recording characterized by comprising a reproduction muting motor speed control means for disabling reproduction muting during scanning of all the tracks and increasing the motor speed when recording and reproducing all the tracks. reproduction machine.