JPS6185671A - Rotary magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To set the time of timer reproduction without installing an exclusive- use switch for setting the reproduction time by operating simultaneously a forward switch and setting indication switch for setting the time of a timer reproduction means. CONSTITUTION:Eight set is set as the basic time of the timer reproduction time of a picture. In order to set the timer reproduction, the forward switch 5 is pressed by prescribed times in the condition where a display switch 7 is turned on. Then a counter part 76 is added for 1sec through an AND circuit 70, and a counted value is increased by 1sec whenever the switch 5 is depressed. When the counter part 76 comes to nine, it means the unlimited reproduction time. While the display switch 7 is turned on, a reverse switch 6 is pressed by prescribed times. Then, the counter part 76 is subtracted by 1sec whenever the switch 6 is depressed, and the reproduction time is decreased by 1sec with 1sec as a limit.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rotating magnetic recording/reproducing device, and particularly to a rotating magnetic recording/reproducing device for reproducing information recorded on a rotating magnetic recording medium such as a magnetic disk. In particular, the present invention relates to a rotary magnetic recording and reproducing apparatus that reproduces information recorded on concentric tracks formed on a magnetic disk while applying tracking servo.

[Background of the invention]

Recently, imaging devices such as solid-state image sensors and image pickup tubes have been combined with recording devices that use magnetic disks, which are inexpensive and have a relatively large storage capacity, as recording media to take still photographs of subjects purely electronically and record them on rotating disks. However, electronic still camera systems have been developed in which images are reproduced using a separate television system or printer.

However, recording media used for such magnetic recording, especially magnetic disks, are prone to tracking defects due to anisotropy, eccentricity, thermal expansion, etc. There is a problem with scanning the tracks and creating crosstalk.

In order to avoid this problem, there is a method in which tracking servo is applied when recording information to record a tracking signal, and this tracking signal is used to apply tracking servo during reproduction. However, it is not practical to provide a tracking servo mechanism that requires precise control to a small, lightweight recording device such as a camera.

Therefore, one method is to adopt the guard hand method or the FM azimuth method as the recording method, and to prevent some tracking failures during playback, to prevent the playback head from scanning the adjacent track, or to prevent the reproducing head from scanning the adjacent track even if it scans. There is a way to compensate by not picking up the signal.

Along with this, a so-called mountain climbing method is also used. During recording, the recording head is moved at a predetermined track pitch by a stevening motor without applying the tracking servo, and during playback, the envelope of the output signal of each track is detected and the optimal track is identified from the peak position. The tracking servo is applied by

In rotating magnetic recording used in electronic still camera systems, for example, the track pinch is about 100 μm on a small disk with a diameter of about 50 m1, that is, the track width is about 50 to 60 μm, and the guard hand width is about 50 to 4 μm.
Fifty tracks are recorded at approximately 0 μm. In a recording or reproducing device, this magnetic disk is
It rotates at a constant speed of 0 rotations, and video signals are recorded or reproduced at field or frame rate.

A small magnetic disk with a small diameter (such as this one) is usually
It is handled by being housed in a molded package (hereinafter referred to as a disk puncture) made of plastic or the like. That is, the entire disk back is loaded into the loading position of a recording or reproducing device, and recording or reproducing is performed by rotating the magnetic disk while the disk is housed in a punctured state.

Incidentally, such a rotary magnetic recording/reproducing apparatus may be provided with a timer reproduction mode in which reproduction of each track on a magnetic disk by a magnetic head is performed at set time intervals. In such a timer playback mode, the playback time can be increased or decreased as desired. In a rotary magnetic recording/reproducing device having such a timer playback mode, if a switch for setting the timer playback time is provided, there is a problem that the number of switches increases.

3. Object of the Invention The object of the present invention is to propose a rotary magnetic recording/reproducing device in which the reproduction time in the timer reproduction mode can be set without providing a dedicated switch.

[Summary of the invention]

According to the present invention, in order to achieve the above object, in a rotating magnetic recording/reproducing device that performs recording or reproducing by moving a magnetic node in the radial direction of a rotating magnetic disk, a timer playback means for automatically sequentially playing back each track at each set time; a switch for instructing the setting time of the timer playback means;
The present invention is characterized in that it is provided with a forward switch for forwarding the magnetic head, and a time setting means for setting the time for the timer reproduction by simultaneously operating these two switches.

[Embodiments of the invention]

Next, according to the attached drawings, there is a rotary magnetic recording/reproduction according to the present invention!
A preferred embodiment of the ia setting will be explained in detail. FIG. 1 shows an external configuration diagram of a rotating magnetic recording/reproducing apparatus 100 according to the present invention. In Figure 1, 1 is the housing, 2 is the power switch,
4 is an eject switch, 5 is a forward switch that forwards the magnetic head, 6 is a reverse switch that transports the magnetic head backwards, and 7 is a track number display that shows which track on the magnetic disk the magnetic head is located on. It's a switch. In addition, 8 is a warning light consisting of an LED, etc.
9 is a remote control connector, and 102 is a bang/throat which is opened by the eject switch 4.

FIG. 2 shows the circuit configuration of the apparatus of this embodiment shown in FIG. 1, in which a rotating recording medium 10 such as a magnetic disk is removably mounted on a spindle 14 driven by a DC motor 12. In this embodiment, the magnetic disk 10 has a sheet of magnetic recording material with a diameter of about 50 mm, and its recording surface 16
A plurality of recording tracks, for example 50 recording tracks, are recorded concentrically at a pitch of about 100 μm, for example. In this embodiment, the signal recorded on the recording track is a video signal,
This may be, for example, a color video signal in which the luminance signal and the chroma signal are FM modulated. For example, this video signal is
A field video signal forming one field of an image is recorded onto one track by rask scanning.

The DC motor 12 has a frequency generator 18 that generates an AC frequency signal and is powered by a servo circuit 20 so that the disk 10 is rotated at a predetermined rotational speed, e.g.
Servo-controlled to rotate at rotation/rotation window speed. The servo circuit 20 is connected to a control device 60 that controls the entire apparatus, and controls rotational driving and stopping of the disk 10 in response to a signal DISK.

A phase generator 22 is disposed at a predetermined position near the recording surface 16 of the disk 10, and is connected to the servo circuit 20 and the control device 60 via an amplifier 24. As a result, timing marks formed corresponding to predetermined positions on the recording surface 16 are detected. and timing pulse P
G is formed.

A magnetic transducer or magnetic head 26 is disposed above the recording surface 16, and is supported by a support mechanism 28. This support mechanism is driven by a step motor (PM) 30, as conceptually shown by a dotted line 28, and moves the helenoid F 26 in both radial directions along the recording surface 16, as shown by an arrow R. It is configured such that any track on 16 can be selected.

The magnetic head 26 may have a magnetic recording function, but in this embodiment, it has a reproduction function of detecting a video signal from a track already recorded on the recording surface 16 and converting it into a corresponding electric signal. Things are exemplified. As mentioned above, in this embodiment, the disk 10 rotates at 3600 rotations/rotation window speed, so that one track's worth of video signal, that is, one field of FM modulated video signal, is sent to the magnetic head 26 every 1/60 second of one rotation. It will be played from. By demodulating this, it becomes compatible with standard color television systems such as the NTSC system.

The reproduction output 32 of the magnetic head 26 is transmitted through a preamplifier 34 to a video signal processing circuit 36 and an envelope detection circuit 38.
It is connected to the. The video signal processing circuit 36
The video signal detected in step 6 is processed, for example, NTSC.
Device output 4 as Fortmant composite color video signal
This is a circuit that outputs to o. This is demodulated and converted from the NTSC Fortmant composite color video signal to the vertical synchronization signal V.
It has a function of extracting SYNC and supplying it to the control device 60. Further, the control device 6o receives the signal MUTE, sets the effective horizontal scanning period of the video signal as a blank signal, and performs a muting operation. Note that the function of converting to such a standard format is not essential to this device, and the processing circuit 3
6 has a synchronization extraction function from the video signal sensed by the head 26, and this is simply controlled by the control device 60 to the terminal 4o.
It may also have the function of outputting to.

The envelope detection circuit 38 detects the envelope of the FM modulated video signal recorded on the track of the recording surface 16.
This is a detection circuit that detects the voltage and outputs a corresponding voltage to the output 42. This is connected via an envelope amplifier 44 to an analog-to-digital converter (ADC) 46. The ADC 46 has 256 quantization levels in this embodiment, and outputs this to the control device 60 as 8-bit data in response to a request from the control device 60.

The control device 60 is a system that controls the entire device according to the operations of the operator, as will be described in detail later. III device, advantageously constituted by a microprocessor system, for example.

In this embodiment, as described above, the power switch 2, the heno M
26 in the forward direction of the track number (for example, from the outer track to the inner track)
5 and a reverse key REV6 for moving the head 26 in the opposite direction, these are connected to a control device 60. The track number 49 on which the magnetic head is located, sent by keys F W D 5 and REV 6, is determined by the control device 6.
0 is visually displayed on a display device 48 such as a CRT display by a superimposing device or the like having an oscillator (not shown) connected to the oscillator. Track N049 is display device 4
The information may be displayed on a display device independent from the display device 48 instead of on the display device 8 .

In this embodiment, the step motor 30 is a four-phase drive pulse operation motor, and responds to one drive pulse by approximately 15 degrees.
It rotates. Therefore, it makes one rotation with 24 pulses. The head support mechanism 28 moves the head 26 in the direction of arrow R by about 4.2 seconds with one pulse supplied to the step motor 30.
It is configured to transfer μm. The excitation time for one pulse is, for example, about 2 to 3 milliseconds. therefore,
The head 26 is moved approximately 100 μm in 24 pulses.

The drive pulses are supplied from a drive circuit 50 consisting of a current amplifier, which generates excitation coil drive pulses for the step motor 30 according to an excitation pattern instructed by the control device 60.

The control device 60 and the servo circuit 20 are connected to a reference generator (O3C
) 62 generates a reference clock G. In this embodiment, the servo circuit 20 has 60H, which is the same as the field frequency of the rask scan video signal recorded on the magnetic disk 10.
The control device 60 is also supplied with a high-speed clock, for example, 3.58 MHz.

In FIG. 3, a magnetic disk puncture 200 used in this embodiment is shown, and this disk puncture 200 is a casing in which a thin, small-diameter magnetic disk 10 for image signals is rotatably housed. It has a body 222. A circular opening 226 is provided approximately at the center thereof, and the hub or core at the center of the magnetic disk 10 can be exposed through the circular opening 226. A magnetic body 214 that excites the coil 22 of the phase generator is formed in a part of the core 212 .

When the disk pack 200 is installed in the magnetic recording/reproducing apparatus 100, the tip of the spindle 14 chucks the magnetic disk 10 into the disk back 2.
It can be rotated within 00.

The disk pack 200 is provided with a shutter 230 that is movable in a direction parallel to one side of the disk puncture 200, as shown by an arrow 228.

When this shutter 230 is moved to a position opposite to that shown in the figure, the opening of the housing 222 underneath is exposed, and the adjustment 'vi, 64 of the playback device 100 and the magnetic head 26 are brought close to or in contact with the magnetic disk 10. can be done.

As shown in FIG. 4A, a disk puncture 200 containing a disk 10 is inserted into its packet 102 for loading into the apparatus 100. Packet 102
The disk puncture 200 is removably accommodated and held, and is rotatably supported by the casing l of the apparatus 100 about the intersection 104. Normally biased in a direction opposite to arrow A by biasing means 106, disc back 200 can be removed from bucket 1-102 at the position shown in FIG. 4A.

When the disk puncture 200 is inserted and the packet 102 is pushed in the direction of the arrow A, the retaining member 108 is interlocked in response to this and biased in the direction of the arrow C about the fulcrum 110, as shown in FIG. 4B. One side 1 of the arm 112 that rotates
16 in the direction of arrow B, and moves to the position indicated by dotted line 108a.

When you release your hand from the packet 102, the biasing means 106
The bucket l-102 is set at the normal loading position by the biasing pressure of , and the engaging member 108 is accommodated in and engaged with the engaging groove 114 at the tip of the arm 112. At this time, the spindle 14 properly chuffs the core 212 of the disk 10.

In this state, the pressing portion 118 at the other end of the arm 112 presses the projection 128 of the normally open contact 120 to close it. In other words, the contact 120 is configured to open only when the bucket saws 1 to 102 are in a properly loaded state. The output terminal 130 of the contact 120 is connected to the control device 60 as shown in FIG. 2, and the control device 60 can thereby detect whether or not the disk puncture 200 has been properly loaded. In this way, the contact 120 forms the load switch shown in FIG.

Furthermore, an opening 122 is provided at the bottom of the bucket 102 as shown by the dotted line. Therefore, when the bucket 102 comes to the normal loading position, the protrusion 1 of the normally open contact 124
26 enters the opening 122 and the disk puncture 200
, which is pressed and closes the contact 124. If the disk pack 200 is not properly inserted into the bucket saw l-102, the contacts 124 will not close. The output terminal 132 of the contact 124 is connected to the control device 60 as shown in FIG.
can detect the presence or absence of a disk puncture 200. Contact 124 thus constitutes the back switch shown in FIG.

In this embodiment, each track of the magnetic disk 16 has a fifth track.
As shown in the figure, the magnetic heads 26 are arranged from the smallest number to the oldest number from the outside toward the center, and the original return position HP of the magnetic head 26 is set to be further outside than the outermost track No. 1. There is. Track selection or tracking control is performed by counting the number of tracks, ie, the number of envelope peaks, as the head moves with this base position (ie, original return position HP) as a reference.

Tracking by mountain climbing control is performed as follows. First, assume that the magnetic head 26 is already on a certain track. When the key FWD5 or REV6 is operated, the control device 60 activates the step motor 30 by the drive circuit 50, and moves the magnetic head 26 in the forward or reverse direction.

In this embodiment, the magnetic head 26 first has an inter-track pitch of 100. It is transported in the forward or reverse direction over a distance slightly shorter than Um, for example, 23 pulses or about 96 μm. At this time, the envelope of the signal read by the magnetic head 26 is detected by a detection circuit 38, and is inputted from the ADC 46 to the control device 60 in the form of digital data. Therefore, the control device 60 further moves the head 26 by one pulse, and compares the level of the envelope of the signal detected from the magnetic head 26 at this time with that of the previous envelope.

In this way, while transferring the head 26, the control device 60
The envelope levels are detected and compared each time, and the position of the envelope peak is determined. The head position where this peak is detected is the position where the head is correctly on-track to that track. In this way, the control device 60 performs mountain climbing tracking.

In order to quickly on-track to a regular track position in such mountain-climbing trunking, it is desirable to return the magnetic head 26 to the original return position HP at least before the start of tracking.

FIGS. 6A to 6E are flowcharts showing control associated with switch operations of various parts in the present invention. (In addition,
Numbers in parentheses indicate step numbers or processing routes in the diagram). First, when the bow switch 2 is turned on, it is reset (300), and the memory contents stored up to now are cleared by RAM clear (302). Next, the key scan (304) detects six switches: back switch (Pack SW) 124, home position switch (LLP, sW) 125, load switch (Load 5W) 120, and forward switch (F).
Reverse switch (Rev SW) 5, Reverse switch (Rev SW) 6
, Track number SWITCH f (T r No, 511
) Scan 7 with a 1v pulse. In other words, this 1■ pulse is transmitted from flow 306 to flow 3 at a period of 1/60 seconds.
09 is scanned, and the on/off states of the six keys are checked every 1/60 seconds.

Next, we will explain the warning process when the forward button 5 or the reverse button (i) is pressed without installing the magnetic disk bank 200 in the main body of the device. First, step 3
When it is determined in step 308 that the back switch 124 is off (310) by the -1-1 scan starting at 04, it is determined in step 312 whether the home position notch 125 is on. If the home position switch 125 is in the OFF state, the head 26 has not yet returned to the starting position (HP position), so the head 26 is sent back toward the home position switch by the head reverse feed (314). . When the head 26 reaches the home position, the judgment obtained by the key scan in step 312 is that the home position switch 125 is in the on state (316).
Then, in step 318, it is determined whether the bucket is closed in the normal position, that is, whether the load switch 120 is turned on. Load switch 120
is not turned on, the disk motor 12 is stopped (320) as shown in FIG. 6B, and the flow returns to the original routine. Next, when the bucket 102 is closed to the normal position, that is, when the load switch 120 is turned on (32
2) Step 32: It is determined whether the forward switch 5 or the reverse switch 6 is turned on. Forward switch 5 and reverse switch 6
If it is determined that the disc motor 12 is in the off state (326), the disc motor 12 is stopped (320) and the flow returns to the original routine. Next, if it is determined in step 324 that the forward switch 5 or reverse switch 6 is in the on state (328), the rotating magnetic recording/reproducing device issues a warning (330). The logical state of each switch in flow 328 is as follows. (Hereinafter, the warning processing is similarly described in sequence in FIGS. 6A and 6B.) Various aspects of this warning processing can be considered. That is, for example, L
Possible modes include emitting the ED warning light 8, flashing the screen, flashing the number display, or emitting a warning sound. Or bucket 1
02 may be opened to notify the unloaded state. During this warning process (330), the disk motor 12 is in a stopped state (320). As explained above, Disc Punk 2
00 is not inserted into the bucket 102, a warning is issued if the forward switch 5 or reverse switch is pressed, so the C company head 26 will not be moved without a puncture inserted. .

Next, in the rotating magnetic recording/reproducing apparatus according to the present invention, if the magnetic head 26 is located on the same track of the magnetic disk for 18 consecutive minutes, a warning is issued, and the magnetic disk 10 is automatically stopped or the magnetic head 26 is stopped for recording. Make sure to evacuate outside the area. This warning process will be explained. First of all, the 6th
At step 332 in the Δ diagram, the magnetic head 26
・Playing on the rack for more than 18 minutes is 18
When it is determined whether the minute timer is set to O (334), it is determined in step 336 whether the forward switch 5 or the reverse switch 6 is turned on. If it is determined in step 336 that the forward switch 5 or reverse switch 6 is in the off state (338), a warning process 330 similar to that described above is performed. Also, such warning processing 330
When the operator learns of the abnormal condition and turns on the forward switch 5 or reverse switch 6 (340), 1
The 8 minute timer is reset and the flow scans the original routine again. As described above, according to the rotating magnetic recording/reproducing apparatus according to the present invention, the magnetic head can be arranged on the same track with 18
If the position is longer than 1 minute, a warning is issued to notify the abnormal state and the magnetic disk is automatically stopped or the magnetic head is evacuated outside the recording area, so there is no possibility of damaging the tracks of the magnetic disk.

Next, in step 344 of FIG. 6B, the bucket 102
If it is determined that it is not closed in the normal position (346)
, the disk motor 12 remains in a stopped state (320
).

Further, if it is determined in step 334 that the bucket 102 is closed in the normal position (348), the disk motor 12 rotates (350).

Next, the rotating magnetic recording/reproducing apparatus according to the present invention performs the following initial operation. That is, if it is determined in step 352 that the initial operation is to be performed, that is, if the flag is zero (354), it is determined in step 356 whether or not the home position switch is in the on state. . If it is determined in step 356 that the home position switch is off (358), the bit head 26 is reversed (360) and moves toward the home position switch 125. Eventually, the magnetic head 26 is located at the home position, and when it is determined in step 356 that the home position 125 is in the ON state (362), the process proceeds to step 364 where initial tracking operation (or unrecorded puncture detection) processing is performed. Transition. In step 364, where an initial tracking operation is performed, the first track is found by the above-mentioned mountain climbing 1 rough kinging operation, and when this initial tracking operation is completed, the flag INT indicating that the initialization process has been completed is set to 1.
(366). The flow in which the flag INT is set to 1 is returned to the original routine again, and in step 352, the process goes directly to step 370 in FIG. 6C, so there is no need to scan the initial operation routine in the next key scan. In the rotary magnetic recording/reproducing apparatus according to the present invention, an operation for detecting an unrecorded pack is also performed in step 364 of performing the initial tracking scan. That is, if the user of the rotating magnetic recording/reproducing device accidentally inserts an unrecorded pack, the magnetic heel 26 searches all the tracks, and if it determines that there are no recorded tracks, that is, if it determines that it is an unrecorded bank. Issues a warning and informs the user that it is an unrecorded pack.

Next, the timer playback settings for images will be explained. The basic image timer playback time is set to 8 seconds,
This timer playback setting can be made by depressing the forward switch 5 a predetermined number of times while the display switch 7 is on, to reduce the timer playback time in 1 second increments, and then with the display switch 7 on, pressing the reverse switch 6 a predetermined number of times to take a still image. You can increase the playback time by 1 second. That is, if it is determined in step 370 that the display switch is turned on (372), then in step 374 it is determined whether the forward switch 5 is turned on. When it is determined that the forward switch 5 is turned on (376), it is determined in step 378 whether the forward switch 5 has been newly turned on or has been kept pressed. If it is determined that the forward switch 5 has been pressed continuously, (3
80), the flow returns to the original routine.

If it is determined in step 378 that the forward switch 5 has been newly turned on (382), then in step 384 it is determined whether the timer counter is 1, that is, whether or not the playback is being performed for 1 second. timer counter is 1
(386), in this case, no matter how many times the forward switch 5 is pressed, the minimum playback time is 1.
seconds and the flow returns to the original routine. Next, when it is determined that the timer counter is not 1 (388), one second is subtracted from the timer counter. That is, when the forward switch 5 is pressed anew when the playback time is 5 seconds, for example, the timer counter is decremented by 1 (390), so that the one hour timer becomes the playback time of 4 seconds. In this way, each time the forward switch 5 is pressed while the display switch 7 remains on, 1 second is subtracted from the timer counter, and the playback time is 1 second.
When the second is reached (386), the 1-second playback setting time is repeated as described above.

FIG. 7 shows a circuit configuration for performing the above-described playback time setting process. The AND gate 70 generates an output signal when both the forward switch 5 and the display switch 7 are on, and corresponds to the process for performing steps 370 and 374 in FIG. 6C before proceeding to step 398. The AND gate 72 generates an output signal when both the reverse switch 6 and the display switch 7 are on, and corresponds to the process of performing steps 370 and 394 and moving to step 378. Further, the OR gate 74 has a function of calculating the logical sum of the forward switch 5 and the reverse switch 6 and generating a CLR (clear) signal for clearing the counting process.
390° 404 and 410, that is, addition and subtraction of the timer counter, and the OR gate 74
It has a function of resetting the counter value by the CLR signal output from the counter.

In the above description, it is assumed that the timer time is added by operating the forward switch 5, but the timer time can also be set by only one of them. For example, if the display switch 7 and forward switch 5 are used in combination, each time the forward switch 5 is pressed, the
The time may be set by cycling the time value such as 2 seconds - 1 second - 8 seconds - 7 seconds.

Next, without pressing the forward switch 5 while the display switch 7 remains on (392), the reverse switch 6 is turned on in step 394 (396), and in step 398 it is determined whether the reverse switch 6 has been newly turned on. It is determined whether the button is held down. If it is determined that the reverse switch 6 remains pressed (400), the flow returns to the original routine. Next, in step 398, when it is determined that the reverse switch 6 has been newly turned on, it is determined in step 402, and in step 404, it is determined whether or not the timer counter is 9, that is, it is an infinite standstill time. If it is determined in step 404 that it is an infinite pause time (406), the infinite pause time will not change no matter how many times the reverse switch 6 is pressed, and the key scan will continue to scan the original routine. Next, in step 404, the timer counter is set to 8.
If it is determined that the following is the case, in step 410, a process of incrementing the timer counter by one second is executed. That is, for example, if the timer counter 5 sets the playback time to 5 seconds, one second is added by pressing the reverse switch 6 once, and the playback time becomes 6 seconds.

Further, when the reverse switch 6 is repeatedly pressed and the timer counter reaches 9, the playback time becomes infinite. As explained above, according to the rotating magnetic recording and reproducing apparatus according to the present invention, each time the forward switch 5 is pressed while the display switch 7 is on, the playback time is subtracted up to 1 second, and when the display switch 7 is on, By pressing the reverse switch 6 every predetermined number of times, the playback time can be increased by one second.

Next, a method of erasing the number display 49 on the screen will be explained. In this erasing method, the number display 49 is erased by turning on the display switch 7 during display. That is, in step 412 of FIG. 6C, it is determined that the display switch 7 has been newly turned on (414), and in step 416, it is determined that the on operation was performed while the track number is being displayed. (4
18), the number display is erased and set to non-display mode (420). Next, when it is determined that the switch 7 will be turned on while it is not displayed (422), the 2 second timer is reset (424), and the track number is displayed for only 2 seconds after the switch is released (422). 426) Display mode is set (428). Also display switch 7
If it is determined that the button is not newly turned on and it is determined that the button has been pressed continuously (430), step 431
If it is not in the non-display mode (432), the two-second timer is reset (424), the track number is displayed (426), and the display mode is set (4
2B).

Next, a method for canceling timer reproduction using the rotating magnetic recording/reproducing apparatus according to the present invention will be explained. Timer regeneration is canceled by turning on the forward switch 5 or the reverse switch 6 during timer regeneration.

That is, the step of FIG. 6D.

If timer playback is in progress at 434 (436),
In step 438, it is determined whether the forward switch 5 or reverse switch 6 is turned on, and if the forward switch 5 or reverse switch 6 is not turned on (440), it is determined in step 442 whether the timer is zero. If the timer is zero, set the predetermined timer playback time again 446)
, performs tracking operation toward the next track (4
48). In step 438, the forward switch 5
Alternatively, if it is determined that the reverse switch 6 is turned on (450), it is determined in step 460 whether the forward switch 5 or the reverse switch 6 has been newly turned on. If the on state of the forward switch 5 or reverse switch 6 is not newly turned on in step 460 (462),
Return to normal routine, and if it is newly turned on (464), timer playback is canceled (466)
. That is, the timer counter is set to 9, and the timer is cleared at the same time as it is stopped (468). As a result, the reproduced image is displayed on the display device 49 in an infinite replay time state. As described above, according to the rotary magnetic recording and reproducing apparatus according to the present invention, timer reproduction can be canceled by turning on the forward switch 5 or the reverse switch 6 during timer reproduction.

Next, the search mode of the rotary magnetic recording/reproducing apparatus according to the present invention will be explained. First, in step 470 of FIG. 6E, the forward switch 5 or the reverse switch 6 is turned on.
If it is determined that is turned on (472), then in step 474 it is determined whether tracking is in progress. If tracking is in progress, return to the original routine (47
6) If tracking is not in progress, the track number display 49 is erased (478). Next, in step 480, it is determined whether the forward switch 5 or the reverse switch 6 is newly turned on, and if it is newly turned on (482), the I-roughing operation is performed in step (
484), the one second timer is reset and the original routine is returned. If the forward switch 5 or the reverse switch 6 is kept pressed in step 480 (488), the 1
It is determined whether the second timer is zero. If the 1 second timer is not zero (492), the original routine is returned. Further, when it is determined that the 1-second timer is zero, that is, the forward switch 5 or reverse switch 6 has been pressed for more than 1 second, the 1-second timer is stopped in the time counter, and at the same time the 1-second timer is cleared (494
), then tracking scan is performed (496). After the tracking operation is completed, track number 49 is displayed for a 2v period, that is, 1/30 seconds. (498). In this way, according to the embodiment, by continuing to press the forward switch 5 or the reverse switch 6, the screen can be sequentially advanced frame by frame at a high speed, and it is possible to advance the screen frame by frame at a high speed, which can be determined by the human eye.
Track number 49 is displayed for a period of time (1/30 seconds), and the desired screen can be searched.

The time counter processing step 500 used in the routine includes a 1 second timer, a 2 second timer, an 18 minute timer, and a time setting timer (TIMER).

〔Effect of the invention〕

As explained above, according to the rotary magnetic recording/reproducing apparatus according to the present invention, the track number display switch is set to another job (in this embodiment, the track number display switch is used as a switch for instructing setting of the set time). Since the time for timer playback is set by operating two switches, there is no need to provide a dedicated switch for timer setting on the panel surface, and the panel layout can be simplified.

[Brief explanation of the drawing]

FIG. 1 is an external configuration diagram of a rotating magnetic recording/reproducing apparatus according to the present invention, FIG. 2 is a block diagram showing a circuit configuration of the rotating magnetic recording/reproducing apparatus according to the present invention, and FIG. 3 is a block diagram showing the circuit configuration of the rotating magnetic recording/reproducing apparatus according to the present invention. Perspective view showing an example of a possible magnetic disk pack, No. 4A
5 and 4B are explanatory diagrams showing the disk puncture loading section of this device, FIG. 5 is an explanatory diagram showing the track arrangement on a magnetic disk applicable to this device, and FIGS. 6A to 6E.
The figure is a flowchart showing an example of the operation flow of the control device shown in Fig. 2, and Fig. 7 is a logic circuit diagram for performing the playback time setting process in the timer playback mode.l...Rotating magnetic recording Housing of the playback device, 8... Warning light, 2... Power switch, 4 Eject switch, 5...
Forward switch, 6... Reverse switch,
7...Track No. display switch, 10...Magnetic disk, 12...Spindle motor, 26...
・Magnetic head, 28...Head transfer mechanism, 60...
・Control device, 100...Rotating magnetic recording and reproducing device, 1
02... Inner bucket, 120... Load switch for detecting disk puncture loading completion, 124...
・Disk puncture detection switch.

Claims (1)

[Claims] (1) In a rotating magnetic recording/reproducing device that performs recording or reproduction by moving a magnetic head in the radial direction of a rotating magnetic disk, the magnetic head sequentially reproduces each track on the magnetic disk at set times. A timer regeneration means for automatically executing, a switch for instructing the setting of the set time of the timer regeneration means, and a forward switch for forwarding the magnetic head sequentially.By simultaneously operating these two switches, the timer regeneration can be performed. 1. A rotating magnetic recording and reproducing device comprising: time setting means for setting a time.