JPS6185668A - Rotary magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To know immediately the unloaded state of a disk pack and to decide easily the unloaded state or a fault state of the disk when no reproduced picture is displayed, by producing an alarm in case a forward or reverse key is actuated in an unloaded state of the disk pack. CONSTITUTION:If a forward or reverse button is pushed before a disk pack 200 is put into a bucket 102 of a reproducer main body, a controller decides an ON or OFF state of a home position switch while a back switch 124 is kept off. While it is decided that a head is set at the home position when the switch 124 is turned on. Then it is decided whether the bucket 102 is set at a normal position or not from the ON or OFF state of a load switch 120. When the switch 120 is kept ON, an unloaded state of the pack 200 is decided. Then an alarm is produced.

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/reproducing apparatus that reproduces information recorded on a trunk concentrically 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, to take purely electronic still photographs of subjects and record them on rotating disks. Electronic still camera systems have been developed that record and reproduce images 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 band method or 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 signal from the adjacent track even if it scans. There is a way to compensate by not picking it up.

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 stepping motor without applying a 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. This applies tracking servo.

In rotating magnetic recording used in electronic still camera systems, for example, a small disk with a diameter of about 50 mm has a track pinch of about 100 μm, that is, a track width of about 50 to 60 μm, and a guard band width of 50 to 40 μm.
Fifty tracks are recorded on the order of μm. In a recording or reproducing device, this magnetic disk has a speed of, for example, 3600
It rotates at a constant speed, and video signals are recorded or played back at field or frame rate.

Such thin and small-diameter compact magnetic disks are usually handled by being housed in a molded plastic package (hereinafter referred to as a disk pack).In other words, the entire disk pack is loaded into the loading position of a recording or playback device, and the disk is Recording or reproduction is performed by rotating the magnetic disk while housed in the bank.

Incidentally, such a disk pack is loaded into a packet of a rotary magnetic recording/reproducing device, and the disk pack is loaded by closing the bucket. However, if the operator accidentally closes the bucket with no disk bank loaded and operates the forward or reverse key to move the magnetic head, the reproduced image will naturally not appear on the display screen. However, it is necessary to inform the operator whether this state is caused by an erroneous loading operation due to the disc pack not being loaded or a failure on the rotary magnetic recording/reproducing device side.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and provides a rotating magnetic recording/reproducing device that issues a warning if the forward key or reverse key is activated when a disk pack is closed and loaded without being loaded into a packet. The purpose is to

[Summary of the invention]

According to the present invention, in order to achieve the above object, a pack switch that operates when a disk bank is loaded into a packet and the bucket is closed to a predetermined position; It is equipped with a forward key and a reverse key for moving the magnetic head, and a warning generation means for issuing a warning on the condition that the pack switch is not activated, the load switch is activated, and any of the keys is operated. It is characterized by

(Embodiments of the Invention) Next, preferred embodiments of the rotating magnetic recording/reproducing apparatus according to the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 shows an external configuration diagram of the rotating magnetic recording/reproducing apparatus 100 according to the present invention. In Fig. 1, 1 is a housing, 2 is a 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 switch that moves the magnetic head backwards. This is a trunk number display switch to indicate which trunk is located on the disk. Also, 8 is a warning light consisting of an LED, etc., 9 is a remote control connector, and 102 is a puffer that is opened by 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 1
6, a plurality of recording trunks, for example 50 recording trunks, are recorded concentrically with a pinch of approximately 100 μm, for example. In this embodiment, the signal recorded on the recording trunk is a video signal, which may be, for example, a color video signal in which a luminance signal and a chroma signal are FM-modulated. For example, 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.
It is servo controlled to rotate at a constant speed of revolutions per minute. 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, a timing mark formed corresponding to a predetermined position on the recording surface 16 is detected, and a timing pulse PG is detected.
is formed.

A magnetic transducer or head 26 is disposed above the recording surface 16 and is carried by a support mechanism 28 . This support mechanism 28 is driven by a step motor (PM) 30 as conceptually indicated by a dotted line 28.
The head 26 is moved along the recording surface 16 in both radial directions as shown by arrow R, and is configured to select any trunk on the recording surface 16.

The magnetic head 26 may have a magnetic recording function, but in this embodiment, it has a playback function of detecting a video signal from the trunk 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 a constant speed of 3,600 revolutions/minute, so one track's worth of video signal, that is, one field of FM modulated video signal, is sent from the magnetic head 26 every 1/60 second of one rotation. It will be played. 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 0. 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, upon receiving the signal nυTE from the control device 60, the effective horizontal scanning period of the video signal is set as a blank signal, and a muting operation is performed. 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 40.
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 0.

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

In this embodiment, as described above, the power switch 2 and the forward key FWD5 are used to move the head 26 in the forward direction of the trunk number (for example, from the outer track to the inner track).
, and a reverse key REV6 for moving the head 26 in the opposite direction, which are connected to the control device 60. The track number 49 on which the magnetic head is located, sent by the keys FWD5 and REV6, is visually displayed on a display device 48 such as a CRT display by a superimposing device or the like equipped with an oscillator (not shown) connected to the control device 60. . Track No. 49 may be displayed not on the display device 48 but on a display device independent from the display device 48.

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 the arrow R by about 4.2 seconds using l pulses supplied to the step motor 30.
It is configured to transfer μm. (2) The excitation time for the 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. In this embodiment, the servo circuit 20 has a frequency of 60 Hz, 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 provided with a reference signal of
．． 8MH2 clock is supplied.

FIG. 3 shows a magnetic disk pack 200 used in this embodiment, and this disk pack 200 includes a housing 222 that rotatably accommodates a thin, small-diameter magnetic disk 10 for image signals. have A circular opening 226 is provided approximately in 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 attached to the magnetic recording/reproducing device 100, the tip of the spindle 14 chucks the magnetic disk 10 into the disk pack 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 pack 200, as shown by an arrow 228.

When the shutter 230 is moved to a position opposite to that shown in the figure, the opening of the casing 222 underneath is exposed, allowing the regulation plate 64 and the magnetic head 26 of the playback device 100 to be brought close to or in contact with the magnetic disk 10. I can do it.

As shown in FIG. 4A, a disk pack 200 containing disks 10 is inserted into its packet 102 for loading into the apparatus 100. Packet 102
The disc pack 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 the direction opposite to arrow A by biasing means 106, disk bank 200 can be removed from packet 102 at the position shown in FIG. 4A.

When the disk pack 200 is inserted and the packet 102 is pushed in the direction of the arrow A, the engagement 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.

Then, when Bucket releases his hand from 71-102, the biasing means 1
The packet 102 is set at the normal loading position by the biasing pressure of 06, and the engagement member 108 is accommodated in and engaged with the engagement groove 114 at the tip of the arm 112. At this time,
The spindle 14 properly chaffs the core 212 of the disk 10.

In this state, the pressing portion 11B 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 close only when the bucket 02 is 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 pack 200 has been loaded normally. Contact 120 thus constitutes a 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, brush 71-102
When the disc bank 20 is in its normal loading position, the protrusion 126 of the normally open contact 124 enters the opening 122 and the disc bank 20
0, this is pushed and closes the contact 124. If the disk pack 200 is not properly inserted into the bucket 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 the disk bank 200. Contact 124 thus constitutes the park switch shown in FIG.

In this embodiment, each trunk of the magnetic disk 16 has a fifth trunk.
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 ItP of the magnetic head 26 is set to be further outside than the outermost track No. 1. ing. 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 reference position, ie, the original return position HP, as a reference.

Tracking by mountain climbing control is performed as follows. First, it is assumed that the magnetic head 26 is already located at the second position of the trunk. When the key FWD5 or RE V 6 is operated, the control device 60 causes the drive circuit 50 to
The PMOK 30 is activated to move the magnetic head 26 in the forward or reverse direction.

In this embodiment, the magnetic head 26 is first moved in the forward or reverse direction by a distance slightly shorter than the trunk-to-trunk pitch of 100 μm, for example, about 96 μm for 23 pulses. At this time, the envelope of the signal read by the magnetic head 26 is detected by the detection circuit 38, and inputted from the ADC 46 in the form of digital data. The head 26 is moved and the level of the envelope of the signal detected from the magnetic head 26 is compared 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 was detected is that tiger 1. This is the position that was correctly on-track. In this way, the control device 60 performs mountain climbing tracking.

In order to quickly on-track the normal track surface during 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 power switch 2 is turned on, data is read (300), and the memory contents stored up to now are cleared by RAM clear (302). Next, the key scan (304) scans six switches, namely the bank switch (Pack SW) 124, the home position switch (IIIl, sW) 125, the load switch (Load 5W) 120, and the forward switch (F
wd SW) 5. Rehearsing switch (ReνSW)
6. Track number switch (Tr No, SW)
7 is scanned with a pulse of 1. In other words, this lv pulse flows from flow 306 to flow 309 with a period of 1760 seconds.
The on/off status of the six keys is determined every 1/60 seconds by scanning the routine leading up to .

Next, a warning process when the forward button 5 or the reverse button 6 is pressed without the magnetic disk bank 200 being attached to the main body of the apparatus will be described. First step 30
When it is determined in step 308 that the puncture switch 124 is off (310) by the key scan starting at step 4, it is determined in step 312 whether the home position switch 125 is on. When the home position switch 125 is in the off state,
Since the head 26 has not yet returned to the starting end value 1 (IP position), 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, step 3
The judgment obtained by the key scan in step 12 is that the home position switch 125 is turned on (316), and then in step 318 it is judged whether the packet is closed in the normal position, that is, whether the load switch 120 is turned on. be done. If the 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 packet 102 is closed in the normal position, that is, when the load switch 120 is turned on (322),
It is determined by the steering knob 324 whether the forward switch 5 or the reverse switch 6 is turned on. When it is determined that the forward switch 5 and reverse switch 6 are in the off state (326), the disc motor 12 is stopped (320), and the flow is returned 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, similarly, Figures 6A to 6
They are listed in sequence in Figure E. ) This warning process can take various forms. That is, for example, it is possible to emit an LED warning light 8, display a blinking screen, display a blinking number display, or emit a warning sound. Alternatively, the unloaded state may be notified by opening the packet 102. During this warning process (330), the disk motor 12 is in a stopped state (320). As explained above, if the forward switch 5 or reverse switch 6 is pressed while the disk pack 200 is not inserted into the packet 102, a warning is issued.
The magnetic head 26 is never moved without a puncture inserted.

A time chart showing the above processing is shown in FIG. 7, and a circuit realizing this logic is shown in FIG. The output signal of the pack switch is inverted by the inverter 70, and the AND gate 72 calculates the AND of this signal and the output signal of the load switch 120. Further, the OR gate 74 calculates the logical sum of the forward switch 5 and the reverse switch 6. Furthermore, the OR gate 74 and the AND gate 72
are ANDed by AND gate 76.

With the above configuration, when the puncture switch 124 is off and the load switch 120 is on, the AND gate 72 generates an output signal, and when either the forward switch 5 or the reverse switch 6 is turned on, the OR gate 74 generates an output signal. An output signal is generated. As a result, the AND gate 76 satisfies the logical condition and generates an output signal for driving the display 8 such as an LED.

Next, in the rotary 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 moved to the recording area. Make sure to evacuate outside. This warning process will be explained. First of all, the 6th
If it is determined in step 332 of FIG. A that the magnetic head 26 has been playing on the same trunk for more than 18 consecutive minutes based on whether the 18-minute timer is 0 (334), the forward switch 5 or It is determined whether 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. Further, when the operator learns of the abnormal state from such a warning process 330 and turns on the forward switch 5 or the reverse switch 6 (340), 18
The minute timer is reset and the flow retraces the original routine. As described above, according to the rotating magnetic recording/reproducing apparatus according to the present invention, if the magnetic head is positioned on the same track for more than 18 minutes, a warning is issued to notify the abnormal state and the magnetic disk is automatically stopped, or Since the magnetic head is retracted outside the recording area, the trunk of the magnetic disk will not be damaged.

Next, in step 344 of FIG. 6B, packet 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. Ru. If it is determined in step 356 that the home position switch is off (358), the magnetic head 2
6 is reversed (360) and moves towards 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 hill-climbing tracking operation, and when this initial tracking operation is completed, the flag INT indicating the initialized state is set to 1 (366). The flow that set the flag INT to 1 is returned to the original routine again, and in step 352, the 6th C
Step 37' in the figure.

Since the processing goes directly to the initial operation routine in the next Keith Gann, there is no need to scan the initial operation routine. Furthermore, in the rotary magnetic recording/reproducing apparatus according to the present invention, an operation for detecting unrecorded punctures is also performed in step 364 in which initial tracking scanning is performed. That is, if the user of the rotating magnetic recording/reproducing device accidentally inserts an unrecorded pack, the magnetic head 26 searches all tracks and issues a warning if it determines that there is no recording trunk, that is, if it determines that there is an unrecorded puncture. will be emitted to notify 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 pressing the forward switch 5 a predetermined number of times with the display switch 7 turned on to reduce the timer playback time in 1 second increments.
The playback time of the still image can be increased by one second by pressing the reverse switch 6 a predetermined number of times in the on state. 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. forward switch 5
If it is determined that the button was pressed and held down (
380), flow returns to the original routine.

If it is determined in step 378 that the forward switch 5 is newly turned on (382), then step 384 determines whether the timer counter is 1 or 1.
It is determined whether or not seconds are being played back. If it is determined that the timer counter is 1 (386), then the forward switch 5 will be set to the minimum playback time of 1 second no matter how many times it is pressed, and the flow will return to the original routine. Return. Next, if 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 when the playback time reaches 1 second (386), the 1 second playback set time is reached as described above. will be repeated.

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 there is an infinite pause time (406), the infinite pause time will not change no matter how many times the reverse switch 6 is pressed °ζ, and the key scan will continue to scan the original routine. . Next, if it is determined in step 404 that the timer counter is 8 or less, then in step 410 a process of incrementing the timer counter by 1 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/reproducing apparatus according to the present invention, when the display switch 7 is in the ON state, the forward switch 5
Each time is pressed, the playback time is subtracted up to 1 second, and the playback time can be increased by 1 second by pushing the reverse switch 6 a predetermined number of times while the display switch 7 is on.

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, if it is determined in step 412 of FIG. 6C that the display switch 7 has been newly turned on (414), and it is determined in step 416 that the on operation was performed while the trunk number is being displayed ( 41
8), the number display is erased and set to non-display mode (420). Next, when it is determined that switch 7 will be turned on again while it is not displayed (422), a 2-second timer is activated (424), and the trunk number is displayed for only 2 seconds after the switch is released (426). The display mode is set (428). In addition, if it is determined that the display switch 7 has not been newly turned on and is determined to have been pressed continuously (430), if it is not in the non-display mode in step 431 (432), a 2-second timer is set. (424), the trunk number is displayed (426), and the display mode is set (428).
).

Next, a method for canceling timer playback using the rotary magnetic recording/playback device according to the present invention will be described. Timer regeneration is canceled by turning on the forward switch 5 or the reverse switch 6 during timer regeneration. That is, if timer playback is in progress in step 434 of FIG. 6D (436), it is determined in step 438 whether the forward switch 5 or the reverse switch 6 is turned on, and the forward switch 5 or the reverse switch 6 is turned on. If it is not turned on (440),
In step 442 it is determined whether the timer is zero.

If the timer is zero, a predetermined timer playback time is set again (446), and a tracking operation is performed for the next 1-rack (448). If it is determined in step 438 that the forward switch 5 or reverse switch 6 is turned on (450), it is determined in step 460 whether the forward switch 5 or reverse switch 6 has been newly turned on. In step 460, if the on state of the forward switch 5 or reverse switch 6 is not newly turned on (/l 62), the routine returns to the normal routine, and if it is newly turned on (464), the timer Playback is canceled (466). That is, the timer counter is 9.
, and the timer is cleared at the same time as it is stopped (46 B). As a result, the reproduced image is displayed on the display device 49 in an infinite reproduction 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 the trunk number 1-Fugu is not in progress, the trunk 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), a tracking operation is performed in step (484), and the 1 second timer is reset. and returns to the original routine. If the forward switch 5 or the reverse switch 6 is kept pressed in step 480 (488), it is determined in step 490 whether or not the one 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 (49
4) Then tracking scan is performed (496). After the tracking operation is completed, track number 49 is displayed for a 2V period, ie, 1/30 seconds. (498) As described above, 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 high speed, and the 2V period can be judged by the human eye. Track number 49 is displayed for (1/30 second) and the required 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 and reproducing apparatus according to the present invention, it is possible to load a disk pack without loading it,
Since a warning is issued when the forward key or reverse key is activated, the operator can immediately know whether the disk pack is not loaded. Furthermore, this makes it possible to easily determine whether the disk pack is not loaded or the device is in a malfunction state when a reproduced image does not appear on the display screen.

[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
4B are explanatory diagrams showing the disk pack 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 flow diagram showing an example of the operation flow of the control device shown in FIG. 2, FIG. 7 is a timing diagram showing the operation timing of the control device in the embodiment shown in FIG. 2, and FIG. FIG. 2 is a logic circuit diagram illustrating a timing diagram of FIG. 1... Housing of a rotating 61 rotation recording and reproducing device, 8...
warning light, 2... power switch, 4 eject switch, 5... forward switch, 6.
... Reverse switch, 7... Trunk No. display switch, 10... Magnetic disk, 12... Spindle motor, 26... Magnetic head, 28...
Head transfer mechanism, 60...Control device, 100...
- Rotating magnetic recording/reproducing device, 102... Inner bucket, 120... Load switch for detecting completion of disk pack loading, 124... Disk pack detection switch.

Claims (1)

[Claims] In a rotating magnetic recording/reproducing device that performs recording or reproduction by moving a magnetic head in the radial direction with respect to a rotating magnetic disk in a disk pack, the disk pack is loaded into a bucket and the bucket is a pack switch that operates when the pack switch is closed to a predetermined position; a forward key and a reverse key that move the magnetic head in the radial direction of the magnetic disk within the disk; and a pack switch that operates when the pack switch is not operated and the load switch 1. A rotary magnetic recording and reproducing apparatus comprising: a warning generating means which issues a warning on the condition that any of the keys is operated.