JPH0437496B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a recording device, and particularly to recording an image signal for each recording track using a recording body that can recognize a plurality of recording tracks in a state where they are separated from each other. The present invention relates to a recording device that is suitable for recording.

<Prior art> For example, using a recording medium such as a magnetic disk or magnetic drum that can identify a plurality of magnetic tracks in a state where they are separated from each other, for each set track,
Recording devices capable of magnetically recording still image signals have already been proposed.

The biggest advantage of this type of recording device is that, unlike photographic cameras that use silver halide film as a recording medium, even if only half of the tracks have been recorded, you can take them out of the recording device. By putting it on an appropriate playback device, you can watch only the recorded portion at will, and after watching it, you can record other images on the remaining tracks by returning it to the recording device. The point here is that it becomes possible to use this method by erasing some of the already-used tracks using an eraser in a playback device and recording other images on the erased tracks.

<Problems to be Solved by the Invention> By the way, when considering this usage, it may happen that another image is recorded on the already recorded track, and when this track is played back,
It is necessary to prevent a reproduced image from being reproduced in such a strange manner that it becomes impossible to know what was recorded due to the mixing of two image signals.

Furthermore, it is necessary to prevent recording from being performed in areas other than the areas to be recorded on the medium that are not intended to be recorded.

In view of these points, the present invention provides a recording device that prevents overwriting on recorded tracks and prevents recording from being performed in areas where recording should not normally be performed. The purpose is to provide.

<Means for solving the problem> A recording device that records image signals on each track on a recording medium, comprising a recording/reproducing head whose recording/reproducing position with respect to the medium is movable, the medium and the recording/reproducing head. a driving means for rotationally driving the recording and reproducing heads relative to each other, a determining means for determining the recording state of the track on the medium from the output of the recording and reproducing head, each time the image signal for one screen is recorded via the recording and reproducing head; a moving means for moving the recording/reproducing head in a predetermined direction on the medium so as to move the recording/reproducing head onto a track determined to be unrecorded by the determining means; the recording/reproducing head is enabled by the moving means; A determining means for determining whether to move further in the predetermined direction than N tracks, and after the recording/reproducing head has recorded the valid N tracks in order to prevent recording on other than the valid N tracks, the driving according to the determination by the determining means is performed. It is characterized by comprising a control means for stopping the driving of the means and prohibiting the recording operation of the recording/reproducing head.

Embodiments of the present invention will be described below with reference to the accompanying drawings. The embodiment shown here is a case in which the present invention is applied to a handy camera. First, referring to FIGS. 1 to 3, the camera is indicated by CA in the figures. TL is the photographic lens, 1 is the focusing ring, and 2 is the zooming control rod. Reference numeral 3 denotes a half mirror for extracting the viewfinder light, which is arranged behind the photographing lens L in the camera body. Reference numeral 4 denotes a half mirror for taking out the photometric light, which is placed in the reflected optical path from the mirror 3, and a photometric element 5 is placed so as to receive the reflected light from the mirror 4. 6
is a total reflection mirror, and behind the mirror 6 is arranged a finder optical system of a known configuration. 7 is an eye cup for the finder. Reference numeral 8 denotes a photographic diaphragm, which is placed behind the mirror 3, and is constructed so that it is possible to cut the diaphragm.
Reference numeral 9 denotes a CCD image sensor as a solid-state imaging device, and here a well-known frame transfer type two-dimensional imaging CCD is used. In addition, as described below,
As is well known, a lenticular lens and a color stripe filter are arranged in front of the imaging section of the CCD 9. Reference numeral 10 denotes a cartridge loading chamber of the camera CA, into which, as shown, a magnetic recording cartridge 12 rotatably housing a magnetic recording disk 11 is loaded. As shown in FIG. 2, the cartridge 12 rotatably supports the disk 11 on a shaft 12a, and a part of its housing has a central opening for receiving a disk drive spindle 14 on the camera CA side. 12b, and a slot 12c for receiving a magnetic head 15, which is also provided on the camera CA side. Above disk 11
As shown in FIG. 1, it has a center hole 11a, is rotatably supported by the shaft 12a in the center hole 11a, and has an arcuate slot 11b concentric with the center hole 11a. The cartridge 12 is biased toward the center opening 12b by a leaf spring 13 provided inside the cartridge 12. Here, as shown in FIG. 2, the loading chamber 10 has a depressed depth, and when loading the cartridge 12, the cartridge loading chamber lid 16 is opened as shown in FIG. is inserted obliquely as shown by the imaginary line, and at this time, its center opening 12
The spindle 14 is inserted into the slot b, and the magnetic head 15 is inserted into the slot 12c in the normal position by being tilted in the direction of the arrow in the figure. The leading end abuts against the magnetic recording section 11c of the disk 11. This recording section 11c can recognize a plurality of recording tracks, for example, 40 recording tracks, separated from each other, and each track records a magnetic signal for one frame of a still image, as will be described later. Further, the disk 11 itself has flexibility, and the head pressure of the head 15 can be obtained by its elasticity. Incidentally, when the loading chamber cover 16 is closed, the cartridge 12 is positioned by leaf springs 17 and 18 (shown in the second figure) attached thereto.
The disk drive spindle 14 has a drive pin 14a that can be engaged with the arcuate slot 11b of the disk 11, and is connected to the shaft 1 of the flywheel 19.
9a, the flywheel shaft 1
9a is supported by a bearing metal member 20 at the boss portion 21 of the camera frame in a manner that prevents rotational play and slip play.
It should be noted that special attention must be paid to the problem of rattling of the shaft 19a, since it has a very large effect on recording performance.

M ₀ is a motor for rotationally driving the flywheel 19, and a rubber belt 23 is stretched between the output pulley 22 and the flywheel 19. Reference numeral 25 denotes a head holding member that holds the head 15 at the bent arm portion 24a at the tip thereof, and is a support that is attached to a part of the camera frame along the slot 12c of the cartridge 12. is slidably supported along the rod 24 by a rod 24;
The spring 26 is biased in the direction of the arrow in FIG. It has ratchet teeth 25b formed by. Note that when the head holding member 25 is displaced by the spring 26 to the final end position in the direction of the arrow in FIG.
Each element is designed such that 5 corresponds to the outermost track in the recording section 11c of the disk 11. In this case, the number of teeth of the ratchet teeth 25b is, for example, 40 in accordance with the set number of tracks on the disk 11. Therefore, head 1
The total number of setting positions of 5 is 41. Numeral 27 is a ratchet feed pawl for engaging the ratchet teeth 25b and shifting the holding member 25 one tooth at a time, and is biased by a spring 28 in the direction of engaging with the ratchet teeth 25b. plunger
Pl is linked to the movable armature Am. The plunger Pl is designed to project the armature Am against the spring 29 by a stroke sufficient to accurately shift the holding member 25 by one tooth when energized. Reference numeral 30 denotes a locking claw for holding the holding member 25 in the forwarded position, and is rotatably supported by a shaft 31 installed in a part of the camera frame. , is biased by a spring 32 in the direction of engagement with the ratchet teeth 25b. 33 is a reset member for automatically returning the holding member 25 to the initial position where the head 15 is in contact with the outermost track of the disk 11 when the loading chamber cover 16 is opened; The lid 16 has a hook portion cut out so that the hook portion can engage with the tail end 30b of the locking claw 30.
attached to a part of. Therefore, when the lid 16 is opened, the locking pawl 30 is rotated by the reset member 33 against the spring 32, and at this time, the feed pawl 27 also rotates at the tip of the locking pawl 30. The protrusion 27a at the tip is pushed by the head 30a of the armature, and it is rotated about the link connection point with the armature Am as a fulcrum against the spring 28, and the engagement with the ratchet teeth 25b is released. As a result, the holding member 25 is automatically returned to the above-mentioned initial position. Note that this reset member 33 has some flexibility, and when the lid 16 is opened beyond a certain angle, the engagement with the locking pawl 30 is released, and when the lid 16 is closed, the reset member 33 releases its engagement with the locking claw 30. When the head abuts against and overcomes the tail end 30b of the locking pawl 30, the hook portion is attached to the tail end 30b.
It is now set at a position where it can engage with b. Therefore, it would be a good idea to make the edge portion of the tail end 30b of the locking pawl 30 rounded as shown in FIG.

In FIGS. 1 and 3, numeral 34 is a release button, which is of a so-called two-stage release type. 35 is the grip part, and here is the power battery E.
is accommodated. Also, in Figure 1, EU is an electric circuit unit, the details of which will be described later.
Further, in FIG. 3, 36 is a dial for mode selection, which can be switched to indicators "S", "C ₁ ", "C ₂ ", and "MV". Here, these indicators mean that "S" means one image shot, "C ₁ " means continuous image shot at a rate of, for example, 7.5 images per second, and "C ₂ " means, for example, one image shot per second.
``MV'' refers to a continuous image shot at a rate of about 3.75 images per second, and ``MV'' refers to a moving image shot at a rate of 30 images per second, which is the standard video recording speed. be). 37 is a slide for selecting the shift of the head 15 relative to the recording track between automatic and manual during one image shot, and can be switched between index "A" and "M";"M" indicates automatic shift, and "M" indicates manual shift. 38 is a push button for shifting the head 15 when manual shift mode "M" is selected;
It is capable of operating the plunger Pl.
It should be noted that it is obviously unreasonable to shift the head 15 manually in the case of modes "C ₁ ", "C ₂ " and "MV", so here, for example, as shown in FIG. In the modes "C ₁ ", "C ₂ " and "MV", the switching from "A" to "M" of the slide 37 is prohibited, and this switching is allowed only in the case of the mode "S", and furthermore, If the mode is switched to "C ₁ ", "C ₂ " or "MV" while the slide 37 is in the "M" position, the slide 37 will be automatically reset to the "A" position. A cam 39 is provided in interlocking relation with the dial 36, and the cam 39 is arranged to face a follower portion 40a of a pin-slot engagement plate 40 on which the slider 37 is provided. Note that 41 is a click stop spring. Furthermore, the mode symbols shown in parentheses for the cam 39 indicate the cam area corresponding to each mode.

Returning to Figure 3 again, 42 is a jack for external output of a video signal (NTSC signal), and a general VTR device can be connected here, and this is especially true when the mode is set to "MV". used. That is, according to the above example, the number of image frames that can be recorded on the disk 11 is only 40 at most.
Therefore, even if you try to record a video on this disk 11 at video recording speed, it will end up being around 1 second, and even if you increase the number of tracks on the disk, there is a limit to the number of tracks, so you will end up using the disk. It is unreasonable to make a video shot in the first place, but if this jack 42 is provided for the mode "MV", long video shots will be possible depending on the combination with the VTR device, and the camera will This means that the functionality will be further expanded. 43 is a remote control jack, to which a remote controller is connected.

The above is the configuration of the main parts of this camera CA that are particularly relevant to the present invention.Next, the details of the circuit configuration of the electric circuit unit EU will be explained.

First, FIG. 5 shows the configuration of an imaging-video signal (NTSC signal) generation-magnetic recording system, where 44 is an oscillation circuit that generates a relatively low frequency clock pulse on the order of KHz, and 45 is the oscillation circuit. 46 is a synchronous control circuit that generates various synchronous control signals necessary for synchronously controlling the circuit system shown here based on clock pulses from 44;
An oscillation circuit 47 generates a relatively high frequency clock pulse on the order of Hz, and an oscillation circuit 47 generates a clock pulse from the oscillation circuit 46 and a synchronization control circuit 45.
Based on the CCD synchronous drive control signal (this is basically a vertical synchronous signal, for example),
This is a sinter driver that outputs various signals necessary to synchronously drive the CCD9. Furthermore, here
As schematically shown in FIG. 6, the CCD 9 consists of a large number of optical sensors arranged in a matrix.
An imaging section (photosensitive section) 9a consisting of elements,
The storage section 9b captures the charges corresponding to each pixel accumulated in the imaging section 9a and stores them in correspondence with the address of each element, and transfers the charges stored in the storage section 9b in time series. It consists of an analog shift register 9c, and as is well known, everything except the imaging section 9a is shielded from light.
Furthermore, a color stripe filter 48 and a lenticular lens 49 are arranged on the front surface of the imaging section 9a, as shown in FIG. Among the signals given to the CCD 9 from the sink driver 47, there is a signal for controlling the accumulation of charges in the imaging section 9a, and a signal for controlling the accumulation of charges in the imaging section 9a. A clock pulse for transferring the charge to the storage section 9b in an extremely short period of time every 1/60 seconds, and a shift register 9c for transferring the charge taken into the storage section 9b.
For example, 1/60 second (this is the
All signals are output in chronological order (i.e., corresponds to the time of 1V-1 partical scan) (i.e.,
The timing of these signals and pulses is defined based on the control signal from the synchronization control circuit 45. Incidentally, although not shown in FIG. 6, it goes without saying that the charge transferred by the shift register 9c is ultimately converted into a voltage, current, or the like and output.
In addition, since this type of frame transfer type CCD is already well known, further detailed explanation will be omitted.

Now, returning to Figure 5 and continuing the explanation, 5
0 and 51 are sample and hold circuits for removing noise components in the output of the CCD 9, and these circuits are controlled by a control signal (sampling signal) from the synchronization control circuit 45. 52 is a video signal (NTSC signal) generation circuit; a luminance signal output circuit 53 outputs a luminance signal Y according to the output from the sample and hold circuit 50; and a color signal R-Y according to the output from the sample and hold circuit 51. and B
A color signal output circuit 54 that outputs -Y, and signals Y, R-Y, B-Y from these circuits 53 and 54.
An encoder 55 that outputs an NTSC signal based on
As is well known, a color signal output circuit 5
4 and the encoder 55 include the synchronous control circuit 45.
A synchronization control signal is given from. Incidentally, since this type of video signal generating circuit is already well known, only the display based on the functional blocks will be given here. 56 is a magnetic recording circuit for video signals;
Filter 57, pre-emphasis circuit 58, FM
Modulation circuit 59, high pass filter 60, band pass filter 61, frequency conversion circuit 62,
A well-known configuration of a so-called color subcarrier low-pass conversion multiplex recording system consisting of a low pass filter 63, a mixing circuit, and a recording amplifier 65 is adopted. Although the operational functions of circuits employing this method are already well known, to briefly mention them here, first, when an NTSC signal, that is, a composite color video signal, is input from the video signal generation circuit 52, this video From the signal, a low pass filter 57 and a band pass filter 61 each output a luminance signal Y,
The 3.58MHz color subcarrier signal _fc is separated. The separated luminance signal Y is subjected to pre-emphasis by a pre-emphasis circuit 58, FM-modulated by an FM modulation circuit 59, and then sent to a high-pass filter 60.
It is applied to the mixing circuit 64 as an FM luminance signal excluding a part of the lower sideband, and on the other hand, the color subcarrier signal f _c
is balanced modulated in the frequency conversion circuit 62 by the signal _fo of a predetermined frequency from the synchronization control circuit 45,
The low-pass filter 63 takes out the difference signal, that is, the low-frequency conversion color subcarrier signal f _s −f _o −f _c and supplies it to the mixing circuit 64 . A mixed signal (that is, a VTR signal) of the color signal carried on the color subcarrier _fs and the FM luminance signal excluding a part of the lower sideband is obtained, and this is sent to the head 15 through the amplifier 55. Therefore, it is recorded on the track of the disk 11.

Next, a first specific example of the sequence control system according to the present invention applied to the configuration described above will be explained with reference to FIG. In the first example shown here, as the above magnetic head 15,
For example, as shown in FIG. 8, a magnetic track on the disk 11 on which an image signal is to be recorded (hereinafter abbreviated as recording) is a magnetic track that has already been recorded. A composite magnetic head consisting of a head 15A and a recording head 15B is used and is arranged in such a manner that the detection head 15A precedes the recording head 15B when the disk 11 rotates in the direction of the arrow in FIG. When performing recording, if the track is a track that has already been recorded, recording is always properly performed on the unrecorded track while preventing double recording on the already recorded track. It was made in a similar manner.

In FIG. 7, SW ₁ is faked so that it is in the closed state in all modes other than the switch "MV" mode linked to the dial 36. Tr ₁ is the switching transistor, SWR ₁ is the release transistor.
The first stage camera release switch is turned on at the first stage of the button 34, and the transistor Tr ₁
connected to the base of. PMC is photometric element 5
This is a photometry circuit that determines an appropriate aperture value based on the output of the image sensor 9a and the charge accumulation time of the imaging section 9a in the CCD 9. In this embodiment, this accumulation time is calculated from the synchronization control circuit 45 shown in the fifth figure to the sink driver 4.
For example, according to the above example, it is a fixed time of about 1/60 second, and therefore, in this case, Fixed information regarding this time is given to the photometric circuit PMC. By the way, this time corresponds to the exposure time of the film in a camera that uses general silver halide film, so this photometering circuit PMC can be used as is in the configuration of the photometering circuit in well-known film cameras. It is. Reference numeral 66 denotes an aperture driving means such as a meter or a motor that adjusts the aperture 8 to a proper aperture value in response to the output of the photometric circuit PMC, and its output shaft is connected to the aperture 8. As mentioned above, the aperture 8 in this case has a so-called aperture cut configuration (the purpose of this is to prevent so-called "burn-in" of the CCD 9). For example, when a meter is used as the diaphragm driving means 66, a spring is applied to the movable coil, and the diaphragm 8 is held in a fully closed state when the coil is not energized. Alternatively, if you use a motor, connect a power storage means such as a capacitor to it, and when the output from the photometric circuit PMC is cut off, the power stored in this power storage means will be reduced. It would be a good idea to pretend that the diaphragm 8 can be forcibly driven to its full stop by being given the following information.

Reference numeral 67 denotes a scale member for displaying the aperture value, which is driven together with the aperture 8 by the aperture driving means 66, and is, for example, a scale member with an aperture value scale marked on a transparent film, and is placed at a visible position within the camera viewfinder. The diaphragm 8 is falsified to display the adjusted diaphragm value depending on the coincidence of the scale with the fixed index 68. La ₁ is the scale member 67
It is a lamp for illuminating from behind, and is connected to the output stage of transistor Tr ₁ , and is powered and lit when transistor Tr ₁ becomes conductive.
Therefore, in addition to illuminating the scale member 67, it also functions to display that the release button 34 has been pressed down to the first stage. MCC is a motor control circuit for controlling the constant speed rotation of the motor _M0 , _SW2 is a switch that is connected to the dial 36 and is only turned on in modes " _C1 " and " _C2 ", and OSP is a This is a one-shot pulse circuit that outputs a momentary high pulse when powered by the conduction of transistor Tr ₁ , and this pulse resets flip-flop FF ₁ via OR gate OG ₁ . The set input S of the flip-flop FF ₂ is connected to the input R via the OR gate OG ₂ .
and flip through or gate OG ₃
It is applied to the reset input R of the flop _FF3 .
SWR ₂ is a release switch that is turned on at the second stage of the release button 34, and its ON-OFF signal is applied to the set input S of the flip-flop FF ₁ via the differential circuit DFC and the inverter IV ₂ . Ru. In addition, flip-flop FF ₁ is a switch.
When SWR ₂ is turned on, it is set for the first time and its output becomes low, and since this output is faked to be applied to the base of transistor Tr ₁ , the release button 34 is pressed down to the second stage. If the transistor Tr ₁ is held for a long time, even if the release button 34 is immediately released, the transistor Tr ₁ will not become non-conductive, and as will be described later, the switch SWR ₂ will be turned off. ,and,
When the detection head 15A detects a recorded track, this holding is released and it becomes non-conductive.

DLC is a delay circuit having a delay time corresponding to the time required for the motor _M0 to start up (50 to 100 msec), and its output is applied to the AND gate _AG1 .

CNT ₁ inputs the vertical synchronization signal (FIG. 10a) from the synchronization control circuit 45 shown in FIG. , c and d are output. AG ₅ is an AND gate that takes the AND of the above A output and B output, and its output is as shown in Figure 10e, and AG ₅ is an AND gate that takes the AND of the above A, B, and C outputs. gate, its output will be as shown in Figure 10f. And now, the first
If the input period shown in Figure 0a is 1/30sec, then A
The output cycle is 1/15sec, the B output cycle is 1/7.5sec,
The cycle of C output is 1/3.75sec, and
Since the high level time of the outputs of gates AG ₅ and AG ₆ and the A output is 1/30 sec, each output is used as a recording control signal in modes "S", "C ₁ ", and "C ₂ ", respectively. These outputs A and the outputs of AND gates AG ₅ and AG ₆ are set to modes "S", "C ₁ ", "C ₂ ", respectively, by switch SW ₃ linked to dial 36. ” is falsely selected. The output of the counter CNT ₁ selected by the switch SW ₃ is output from the output stage of the imaging-video signal generation-magnetic recording system circuit 69 having the configuration shown in FIG. 5 (i.e., the amplifier circuit 65 shown in FIG. 5). It is attached to a recording control analog switch ASW provided between the recording head 15B and the recording head 15B, and recording is controlled thereby. Further, the clear terminal CL of the counter _CNT1 is falsely applied so that the output of the flip-flop _FF2 is applied, and counting is possible only when this output is low.

La ₂ is caused by the transistor Tr ₂ which receives the output of the flip-flop FF ₂ at its base, and lights up when the output is low, that is, when the counter CNT ₁ is counting, and recording is performed. This is a lamp that indicates that the

AP is an amplifier that amplifies the output of the detection head 15A, HIC is a signal integration circuit that integrates the signal output from the amplifier AP, and COM is a comparator.
The output of the comparator COM is high for a recorded track and low for an unrecorded track, which is connected to the AND gate AG ₃ and the OR gate.
Assigned to gates OG ₁ , OG ₂ and OG ₃ . Further, an inverted signal of the output of the comparator COM is applied to AND gates _AG1 and _AG2 . CNT ₂
is a counter which receives the clock pulse from the oscillation circuit ₁₄ shown in FIG. I try to get enough duty pulses. The output of the AND gate _AG4 is applied to an AND gate _AG3 , and the output of the AND gate _AG3 is applied to the base of the transistor _Tr3 .

La ₃ is a lamp that lights momentarily to indicate this when a track has already been recorded in mode "S-M", that is, 1 image shot - manual head shift mode. It is connected to the collector side of the transistor Tr ₃ in mode "M" by the switch SWM ₁ interlocked with the transistor Tr 37. In addition, in mode "A", the switch SWM ₁ connects the plunger Pl to the transistor.
Connect it to the collector of Tr ₃ . SWP is a push switch turned on by the push button 38, and SWM ₂ is linked to the slide 37,
This is a switch that connects the switch SWP to the plunger Pl in mode "M".

In addition, the jack 42 for external output of the above NTSC signal
is connected to the circuit 69, ie, more specifically, to the output stage of the video signal generating circuit 52 shown in FIG. Further, the remote jack 43 is connected to switches SWR 1 and SWR ₁ through diodes D ₁ and D ₂ as shown in the figure.
Connected in parallel with SWR ₂ .

SWE is a normally-closed end switch that is released when all tracks on disk 11 are finished recording.
The switch is connected in series with the transistor _Tr1 . Incidentally, it would be reasonable to use the configuration shown in FIG. 9, for example, as a configuration for activating this end switch SWE. That is, in the configuration shown in the figure, the tail end is pivotally attached to a part of the camera frame by a shaft 70, and a pin 71 installed in the head holding member 25 is engaged with a slot 72a in the middle thereof. A track counting member 72 is provided which swings in response to the feeding of the holding member 25, and a track number scale plate 75 disposed within the window 74 is controlled by a pointer 73 attached to the tip of the counting member 72. The number of recorded tracks can be displayed at the top, and the recording on the disk 11 is further made possible at the time when the holding member 25 is shifted to the left in the figure by the total number of teeth of its ratchet teeth 25b. The end switch SWE can be opened by the switch release protrusion 76 at the tip of the count member 72 when the end switch SWE is shifted further inward by one tooth after coming off the innermost track of the part 11c. It is. Incidentally, the power supply to the circuit system shown in FIG. 5 is faked so that it is controlled by the transistor _Tr1 , similar to the photometric circuit PMC.

Now, next, the operation of the camera having the above electrical system configuration will be explained. As mentioned above, this camera has a mode of "S-A" (1
Image shot - automatic head shift), "S-M"
(1 image shot - automatic head shift), "C ₁ "
There are five modes: (continuous shots at 7.5 images/second), "C ₂ " (continuous shots at 3.75 images/second), and "MV" (video shots depending on the VTR speed using a VTR device). However, in order to facilitate understanding, the case of mode "SA" will first be explained with reference to the timing chart of FIG.

First, the camera CA is loaded with a cartridge 12 in which all tracks on the disk 11 are unrecorded (at this time, the head 15 is set at its initial position as described above, ), and the dial 36 is in the "S" mode position, switch SW ₁ is in the on state, switch SW ₂ is in the open state, and the switch is in the "S" mode position.
SW ₃ is connected to the A output terminal of counter CNT ₁ . Furthermore, when the slide 37 is set to the "A" mode position in this state, the switch _SW1 is connected to the plunger Pl side, the switch _SWM2 is opened, and the camera CA is placed in the "S-A" mode.

In this state, while looking through the viewfinder, the camera CA
Aim the camera at the desired object and press the release button 34 to the first step to release the release switch.
Since SWR ₁ is turned on, transistor Tr ₁ becomes conductive, and therefore, the photometric circuit PMC is activated and the aperture 8 is turned on.
is adjusted from the fully aperture state to the appropriate aperture value, the lamp La ₁ lights up, the scale plate 67 is illuminated, and the motor M ₀ starts and the disc 1 is turned on.
1 is driven to rotate. This situation is the 11th
Shown in Figures a, b, d-f. Also, transistor
When Tr ₁ becomes conductive, the one-shot pulse circuit OSP outputs a pulse as shown in Fig. 11g, which powers up and clears flip-flop FF ₃ , as well as flip-flops FF ₁ and FF. FF ₂ is reset and set, respectively, and its output and output go high as shown in FIG. 11h and i. On the other hand, when transistor _Tr1 becomes conductive, power is supplied to the circuit system shown in FIG.
starts driving, and imaging - video signal generation -
VTR signal output will start. At this time, _the synchronization control circuit 45 applies a vertical synchronization pulse as _shown in _FIG . Therefore, it is locked in a clear state, that is, in a state where it cannot count, and does not count the pulses at all, so its A output is low as shown in Figure 11l, and the analog switch ASW remains off. It's summery.
Also, at this time, a clock pulse is applied from the oscillation circuit 44 to the counter _CNT2 . Moreover, after the time elapsed after the conduction of the transistor Tr ₁ to allow the time required for the motor M ₀ to rise to a steady speed, the delay circuit is activated as shown in FIG. 11j.
The output of DLC will be high, and therefore one input of AND gate _AG1 will be high at this point.

Also, at this time, since the disk 11 is completely unrecorded, no signal appears in the output of the detection head 15A, so the output of the comparator COM is low as shown in Figure 11n. . Therefore, the plunger Pl is not energized and the head 15
The heads A and 15B are held at the initial position, that is, at the position where they are in contact with the outermost track in the recording section 11c of the disk 11. Also, at this point, one input of the AND gate _AG1 becomes high depending on the output from the inverter _IV1 .

Now, in this state, when the release button 34 is pressed down to its second stage (as shown in FIG. 11a), the release switch SWR ₂ is turned on as shown in FIG. IV ₂
The output of flip-flop FF 1 is inverted from low to high, so flip-flop FF ₁ is set, and at this time the output of AND gate AG ₂ becomes high, so that the set input S of flip-flop FF ₃ is connected to the AND gate. The output of AG ₂ is applied to set the flip-flop FF ₃ , and its output goes high as shown in FIG. 11m. According to this and gate
Since all three inputs of AG ₁ are high, its output is high at this point, and therefore the output of flip-flop FF ₂ is inverted to low as shown in Figure 11i, so that counter CNT ₁ is cleared and starts counting input pulses.

Incidentally, when the output of the inverter _IV2 is reversed from low to high, the flip-flop _FF1 is set and its output becomes low as shown in Fig. 11h.
Therefore, since the transistor Tr ₁ is kept conductive, even if the release button 34 is released at this point, the power supply to the circuit system is not cut off and the following operation continues.

Now, when the counter CNT ₁ starts counting its input pulses and its A output goes high as shown in Figure 11l, this causes the analog switch to
When the ASW is turned on, the output of the fifth amplifier circuit 65 shown in the figure is applied to the recording head 15B, so that a signal for one frame of the target image is magnetically recorded on the outermost track of the disk 11. . Here, the A output at this time is the 10th output in this embodiment.
As explained with reference to the figure, the synchronous control circuit 45
The frequency of the vertical synchronization signal (Figure 10a) from Figure 5 is divided by 2, and its high level time is one period of this vertical synchronization signal, that is, 1/30 second. As is well known in the circuit system, the reading of the CCD output is repeated twice in succession during this 1/30 second period, so in the end, two fields and one frame of signals are magnetically recorded on the track of the disk 11. Also, therefore, the motor control circuit
The MCC is designed to control the motor M ₀ at a constant speed of 1800 rpm.

In this way, when 1/30 second elapses after the A output of the counter CNT ₁ becomes high, the A output becomes low again and the analog switch ASW turns off.
During this time, one frame worth of signals is recorded on the track of the disk 11 using the two-field method, but as described above, the detection head 15
Since the detection head 15A is provided in advance of the recording head 15B, when one frame of recording is completed, the detection head 15A picks up the magnetic signal recorded by the recording head 15B, and therefore detects the magnetic signal recorded by the recording head 15B. Since the signal component begins to appear in the output, at this point the output of the comparator COM becomes high as shown in Figure 11n, and as a result, the output of the inverter IV ₁ becomes low, so that the output of the AND gate AG ₁ becomes high. Output goes low. Also, the comparator COM at this time
The high output of flip-flop _FF2 sets its output to high as shown in FIG. 11i. As a result, the counter CNT ₁ is cleared and is restricted to a non-counting state, so its A output remains low after the end of recording, as shown in Figure 11l, and the analog switch
ASW also remains off. Also, comparator
When the output of COM goes high, the AND gate
Since the output pulse from AG ₄ is applied to the base of the transistor Tr ₃ through the AND gate AG ₃ , the transistor Tr ₃ becomes conductive and the plunger Pl becomes conductive. Since the holding member 25 is advanced by one tooth of its ratchet teeth 25b, the heads 15A, 15B
is now shifted to the second track of disk 11, and since disk 11 is completely unrecorded, heads 15A,
15B is shifted to the second track, there is no signal in the output from the detection head 15A, so the output of the comparator COM is inverted to low at this point, as shown in FIG. 11n. become. Note that when the output of the comparator COM goes high, flip-flop _FF3 is reset. Also, when the output of the comparator COM goes high, the flip-flop _FF1 is reset and its output goes high as shown in Figure 11h.
Therefore, the conductivity of the transistor _Tr1 is released. Therefore, at this point, the release button 34 has been released and the release switch has been released.
If SWR ₁ and SWR ₂ are turned off, transistor Tr ₁ becomes non-conductive and power supply to the entire circuit system is cut off. Also, this release button 34
As for the timing to release the press, for example, as shown in Fig. 11a, if it is pressed to the second step, that is, after the switch SWR ₂ is turned on once, the flip is released as described above.・Flop FF ₁
The camera automatically performs the _above operation and stops when the heads 15A and 15B have finished shifting to the second track. However, on the other hand, Similarly, as shown in Fig. 11a, if the first step is pressed but the second step is not pressed and is released, the camera will not release because the conduction of transistor Tr ₁ will not be maintained. Button 34
It will stop immediately when you release it.

Although the explanation may be confusing, while the output of flip-flop FF ₂ is low, that is,
During recording, the transistor Tr ₂ becomes conductive, causing the lamp La ₂ to light up, thus displaying the fact that recording is in progress. Furthermore, this lamp La ₂
It would be convenient to arrange the lights so that they can be seen in the viewfinder.

In this mode “S-A”, the camera is 1
After the recording of frames is completed, the heads 15A, 15
B is stopped or on standby with an automatic shift to the next track being performed, and therefore, the above-mentioned operation is repeated every time the release button 34 is pressed down to the second stage. Then, disk 1
One frame worth of image signals is sequentially recorded on each track.

The number of recorded tracks at this time is sequentially indicated on the track number scale plate 75 by a pointer 73 attached to the tip of the counting member 72 shown in the ninth figure. Further, when the recording on the innermost track of the disk 11 is completed and the heads 15A, 15B are automatically shifted, the end switch SWE is opened by the protrusion 76 at the tip of the count member 72.
The power supply to the entire circuit system will be temporarily cut off.

Now, the above is a case in which no recording has been made on the disk 11 at all, but if, for example, a cartridge in which recording has already been done up to the middle track is loaded, the situation will be as follows. That is, first, if the first track of disk 11 is already recorded, the switch SWR ₁
Since the output of the comparator COM becomes high when the motor _M0 is turned on and the motor M0 starts, recording is prohibited as described above, and the plunger Pl
energization is applied to shift the heads 15A, 15B to the next track. Also, at this time, the output of inverter IV ₁ becomes low, so even if flip-flop FF ₁ is set at this time, that is, even if switch SWR ₂ is closed, its output remains low. Therefore, flip-flop _FF3 is not set. On the other hand, head 15
If the new track is unrecorded when A and 15B are shifted, the comparator
Since the output of COM becomes low, recording prohibition is canceled, and the output of AND gate AG ₂ becomes high and flip-flop FF ₃ is set, so one frame is recorded as described above. signal is recorded on this new track, but if this new track is also a previously recorded signal, the comparator
Since the output of COM remains high, the heads 15A and 15B are further shifted to the next track while recording is prohibited.

Therefore, if a cartridge is used in which some of the tracks have already been recorded, recording will be prohibited for the already recorded tracks, and heads 15A and 15B will be automatically shifted without double recording. Then, when an unrecorded track is detected, recording is started on the unrecorded track.

Now, the above was for the case where the mode is "S-A", but next, in the case of the mode "S-M", that is, one image shot - manual head shift, the slide 37 is moved to the "M" position. Switch by switching
Since SWM ₁ is switched from the plunger Pl side to the lamp La ₃ side and the push switch SWP is connected to the plunger Pl via the switch SWM ₂ , the tracks that the heads 15A and 15B are in contact with have already been recorded. Even if this is detected, the heads 15A, 15B are not automatically shifted to the next track, but instead, the lamp La ₃ lights up momentarily to indicate that the adjacent track of the heads 15A, 15B has already been recorded. A warning will be displayed. In this case, by pressing the push button 38 and turning on the switch SWP, the head 15A,
15B can be shifted to the next track.

Therefore, in this mode "S-M", if the contact tracks of the heads 15A and 15B are not recorded from the beginning, recording is performed in the same manner as described above by the camera release. Also, even if the output of the comparator COM goes high at the end of this recording, the lamp La ₃ will only turn on for a moment, and the heads 15A and 15B will not be shifted to the next track. This shift is performed by putting in the push switch SWP. On the other hand, heads 15A and 15B
If the corresponding track has already been recorded from the beginning, the lamp La ₃ will light up momentarily, so switch it now.
When the SWP is turned on, heads 15A and 15B are shifted to the next track, and if this track is unrecorded, recording is performed on this unrecorded track.
Of course, if this track has already been recorded, the lamp _{La 3} will turn on again for a moment to warn you, so the warning will be repeated until the heads 15A and 15B reach the unrecorded track, and the push button will stop.・Head 1 is set by repeatedly pressing the button 38.
It is not until 5A and 15B reach the unrecorded track that recording is started on the unrecorded track.

Next, in the case of mode "C ₁ " or "C ₂ ", that is, in the case of continuous image shots, the switches SW 1 to _{SW 3 are} switched by switching the dial 36 to the mode "C ₁ " or "C ₂ " position. In either case, the mode is switched to the "C ₁ " or "C ₂ " terminal.

Therefore, the differentiator circuit DFC is short-circuited by the switch SW ₂ , and while the switch SWR ₂ is on, the flip-flop FF ₁ remains set, and therefore the release button 34 remains set.
While pressing up to the second step, the heads 15A, 15
As long as the adjacent track of B is an unrecorded track, recording is not prohibited and recording continues and continuous image shots are performed. Of course, in this case, as can be understood from the operation in mode "S-A" described above, if there is a recorded track on the way, the output of the comparator COM goes high when this recorded track is detected. As a result, the flip-flop _FF2 is set, the counter _CNT1 is cleared (that is, recording is prohibited), and the plunger Pl is energized and the heads 15A and 1 are energized.
5B is automatically shifted to the next track, and if this track is unrecorded, recording will be performed on that track. This operation continues as long as the release button 34 is pressed down to the second position. In addition, transistor Tr ₁
The conduction is maintained in the same way as in the above case.
Also, in the case of mode "C ₁ ", the AND gate
The output of AG ₅ and, in the case of mode "C ₂ ", the output of AND gate AG ₆ are selected by switch SW ₃ , respectively, as explained with reference to FIG. In the case of mode "C ₁ ", continuous shots are made at 7.5 images/second, and in the case of mode "C ₂ ", continuous shots are made at 3.75 images/second.

By the way, this camera has an external output jack of 42.
When a general VTR device is connected to the , and dial 36 is set to mode "MV", the normal VTR speed,
That is, it is possible to shoot moving pictures at a speed of 2 fields - 30 frames/sec. That is, dial 36
When set to mode "MV", switch SW ₁
~ SW ₃ are all switched to their mode “MV” terminals, so in this case, release button 3
Follow 4 to the first step and press the switch.
Simply turning on SWR ₁ activates the circuit 69 and outputs an NTSC signal from the jack 42, which causes magnetic recording in the VTR device in a well-known manner.

Next, a second specific example of the sequence control system according to the present invention will be described with reference to FIG. In the second example shown in FIG. 12, one magnetic head is used both for detecting unrecorded and recorded tracks and for recording, and its operation mode is switched as appropriate using the output of the counter _CNT1 . In particular, it is designed to function in exactly the same way as the control system shown in FIG.
In the figure, elements designated by the same reference numerals as in FIG. 7 are completely the same as those described above, and therefore, only the parts that are different from the configuration shown in FIG. 7 will be explained here. In the figure, 15 is a magnetic head for detection and recording, and the analog switch 15 is a magnetic head for detection and recording.
An analog signal provided at the input stage of the ASW and the unrecorded track detection circuit (i.e., amplifier AP, signal integration circuit HIC, and comparator COM).
The analog switch ASW' is connected to the analog switch ASW', and the analog switch ASW' has an inverter of the signal to be applied to the analog switch ASW.
An inverted output according to IV ₄ is provided. Therefore, according to this circuit configuration, when the output of counter CNT ₁ is low, analog switch ASW' is turned on and head 15' is turned on.
is used to detect a previously recorded track, and when an unrecorded track is detected at this time and the output of counter CNT ₁ becomes high, analog switch ASW is turned on and the head 1 is detected.
5' is used for recording on the unrecorded track. The other details of the operation are exactly the same as those of the circuit system shown in FIG. 7, so a description thereof will be omitted.

Now, in all of the embodiments shown above, the heads are mechanically shifted with respect to the tracks of the disk 11, but finally, the magnetic heads are shifted to a multi-channel system corresponding to the number of tracks on the disk 11.・The 13th embodiment concerns a case where this is fixedly provided as a head, and by sequentially switching channels, it is possible to determine whether each track is unrecorded or recorded, and to record on unrecorded tracks. This will be explained with reference to FIG.
Note that Figures 13 and 14 only show the configuration of the main parts to obtain the above functions, and other necessary parts are shown in Figures 7 and 1.
This will be explained with reference to the configuration shown in FIG.

First, the example shown in Fig. 13 is for the configuration shown in Fig. 7. In the figure, CNT ₃ is a counter with a built-in decoder for channel shift, and its clear terminal CL has the one shot The output of the pulse circuit OSP is provided.
IV ₅ is an inverter and OC for obtaining an inverted signal of the output of the one-shot pulse circuit OSP.
is a one-shot circuit that is triggered by the rising edge of the output of the inverter IV ₅ , and OG ₄ is a one-shot circuit that is triggered by the rising edge of the output of the inverter IV 5.
This is an OR gate configured to receive both the output of the shot circuit OC and the Q output of the AND gate _AG3.The output of the OR gate _OG4 is used as a count-up clock to input the clock of the counter _CNT3. It is designed to be attached to terminal CK.

_15A1 to _15Ao are fixedly provided holes corresponding to each track of the disk 11, respectively.
The recorded track detection heads 15B ₁ to 15B _o are recording heads fixedly provided corresponding to each track, and these are so-called multi-track recording heads.
It is configured as a channel head, and
As in the case of the head 15 shown in FIG. 8, when the disk 11 rotates, the detection heads 15A ₁ to 1
5A _o is integrated and arranged so that it always precedes the recording heads 15B ₁ -15B _o . ASW ₁ ′ to ASW _o ′ are each head 15A ₁ to 1, respectively.
5A _o is the analog switch connected to the input stage of the unrecorded track detection circuit,
That is, it is connected to the amplifier AP. ASW ₁ ～
ASW _o is an analog switch connected to each head 15B ₁ to 15B _o , and each of them is an analog switch connected to each head 15B 1 to 15B o.
It is connected to the output stage of the video signal generation/magnetic recording system circuit 69. AND ₁ to AND _o are the ANDs of the A output of the counter CNT ₁ selected by the switch SW ₃ or the output of the AND gate AG ₅ or AG ₆ , and each of the outputs 1 to n of the counter CNT ₃ , respectively. is an AND gate that takes , the output of each of which is
are assigned to analog gates ASW ₁ to ASW _o , respectively. Note that outputs 1 to n of the counter CNT ₃ are applied to the analog switches ASW ₁ ′ to ASW _o ′, respectively.

According to the above configuration, first, in the first stage of the release, the one-shot pulse circuit OSP
When a one shot pulse is output as shown in FIG. 1g, the counter CNT ₃ is powered up and cleared, and its outputs 1 to n all become low. Next, the one-shot circuit OC is triggered by the rise of the output of the inverter IV ₅ at this time and outputs a one-shot pulse, which causes the counter CNT ₃ to count up by one and first count up. Output 1 goes high. Therefore, if the mode is set to "C ₁ " or "C ₂ " and the output of counter CNT ₁ is low, only analog switch ASW ₁ ' is turned on and the detection head is turned on. The output of _15A1 is now given to the amplifier AP. And head 1
If the first track where 5A ₁ and 15B ₁ are in contact is not recorded, the output of the counter CNT ₁ becomes high as described above, so the output of the AND gate AND ₁ becomes high, and therefore, Recording is performed on the first track by the recording head _15B1 . When this recording is finished, the detection head 15
When it is detected that A ₁ has already been recorded, the output of AND gate AG ₃ becomes high in the same manner as described above, and this causes counter CNT ₃ to count up by 1 and output 2 to turn up. Since the analog switch ASW ₂ ' is turned on, the detection head _15A2 detects whether or not the second track is unrecorded, and if it is unrecorded, the above-mentioned Similarly, when the output of the counter _CNT1 becomes high, the recording head _15B2 starts recording the second track. or,
If it has already been recorded, the output of AND gate AG ₃ will go high, so counter CNT ₃ will become 1.
counts up and its output 3 goes high, so the above detection is performed for the third track, and eventually, if the mode is "C ₁ " or "C ₂ ", all posts are executed. As in the case of the example, recording to the unrecorded track will be repeated as long as the release button 34 is pressed.

In addition, when the mode is "S", after recording to the unrecorded track is completed, the Q output of AND gate AG ₃ becomes high, and the counter CNT ₃ counts up by one, and the flip-flop starts.・Flop
The camera stops operating due to the action of FF ₃ , and when the release button 34 is released and then pressed again, the detection heads start from detection head _15A1 until an unrecorded track is detected. When channels 15A ₁ to 15A _o are switched and an unrecorded track is detected, recording is performed using the recording head corresponding to this track.

The example shown in FIG. 14 is for the configuration shown in FIG. 12, and the head 1 in the configuration shown in FIG.
5A ₁ to 15A _o and 15B ₁ to 15B _o in the figure, 15
As shown in ₁ ' to 15 _o ', the analog switches
ASW ₁ ′ and ASW ₁ , ASW ₂ ′ and ASW ₂ ……,
Connect to ASW _o ′ and ASW _o to create a multi-channel head for both detection and recording.
Each counter is selected by switch SW ₃ .
Invert signal and counter of A output of CNT ₁ or output of AG ₅ or AG ₆ by inverter IV ₆
AND with each output 1 to n of CNT ₃ .
Gates AND ₁ ′ to AND _o ′ are provided, and each output of the AND gates AND ₁ ′ to _{AND o} ′ is connected to an analog signal.
The switches ASW ₁ ′ to ASW _o ′ are added to the switches ASW 1 ′ to ASW o ′.

Note that the operation when the configuration shown in FIG. 14 is used can be easily understood from the explanation of the circuit configuration shown in FIGS. 12 and 13, so a description thereof will be omitted.

According to the structure shown in FIGS. 13 and 14, no mechanical structure for head shifting as shown in FIG. 2 is required. In addition, when adopting this configuration, it is inconvenient to provide a configuration for switching between "A" and "M", that is, a slide 37, a push button 38, and switches SWM ₁ , SW ₂ , and SWP. Will. Incidentally, in this case, if the lamp La ₃ is connected to the collector of the transistor Tr ₃ , the count up of the counter CNT ₃ , that is,
The state of channel switching of the heads 15A ₁ to 15A _o and 15B ₁ to 15B _o is displayed.

In order to display the number of recorded tracks when the configuration shown in Figs. 13 and 14 is adopted, for example, as shown in each figure, a display unit DU consisting of a decoder driver and a seven-segment LED for display is used. It may be possible to provide a digital display by providing the outputs 1 to n of the counter _CNT3 to the decoder in the display unit DU, or alternatively, a It would be better to display the number of dots using an LED dot array display. Particularly in this case, it is convenient to do this within the display camera viewfinder.

Further, as a configuration for controlling the end switch SWE, for example, the counter CNT ₃
A transistor Tr _{4 is connected to the n+1st output terminal of the transistor Tr 4} with an electromagnet Mg connected to its collector side as shown in the figure.
It would be better to connect the base of , and when this n+1 output goes high, the electromagnet Mg is energized, thereby opening the end switch SWE.

In the examples, the imaging-video signal generation-magnetic recording system circuit employed in the apparatus of the present invention is as follows:
In particular, we have shown a configuration using a CCD image sensor as the image sensor, but it goes without saying that there is no problem in using a conventional image tube such as a videocon as the image sensor. Further, as for the recording medium, although a magnetic disk is shown in the embodiment, other magnetic drums or the like can be easily used by slightly modifying the mechanism of the camera CA.

In the embodiment described above, the recording/reproducing head whose recording/reproducing position with respect to the medium is movable is the head 15 shown in FIG. 2, and the driving means for relatively rotationally driving the medium and the recording/reproducing head is the driving means. The motor _M0 shown in FIG. 7 is used, and the determination means for determining the recording state of the track on the medium from the output of the recording/playback head is shown as COM in FIG. 7, and the image signal for one screen is recorded via the recording/playback head. A moving means for moving the recording/reproducing head in a predetermined direction on the medium so as to move the recording/reproducing head onto a track determined to be unrecorded by the determining means each time is a plunger Pl, a feed pawl 27, etc.; A counting member 72 provided with an open protrusion 76 is used as a determining means for determining whether the recording/reproducing head is moved further in the predetermined direction than the effective N tracks by the moving means, and recording on other than the effective N tracks is prevented. SWE in FIG. 9 is a control means for stopping the driving of the driving means and prohibiting the recording operation of the recording and reproducing head based on the determination by the determining means after the recording and reproducing head has recorded the valid N tracks.

<Effects of the Invention> As explained above, according to the present invention, it is possible to accurately record images of N effective tracks on a recording medium;
This prevents overwriting of already recorded tracks.
Furthermore, the control means is activated after the recording/reproducing head records the effective N tracks (N+
1) It is possible to reliably prevent over-recording of tracks, and the driving means for rotational drive is stopped after recording N effective tracks, which not only reduces wasted power but also reduces the head and media. If they are in contact with each other, abrasion of both can be prevented.

[Brief explanation of drawings]

FIG. 1 is a transparent perspective view of the main parts of a camera incorporating an embodiment of the device of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a cross-sectional view of FIG. 1. −
4 is a plan view of essential parts showing the related structure of the mode select dial and mode select slide shown in FIG. 3, and FIG. 5 is an imaging-video signal applicable to the device of the present invention. A block circuit diagram showing the basic configuration of an example of a generation/magnetic recording system circuit, FIG. 6 is a schematic diagram of a CCD image sensor as a solid-state image sensor employed in the circuit shown in FIG. FIG. 8 is an enlarged perspective view of the main parts showing details of the configuration of a magnetic head suitable for the circuit shown in FIG. 7, and FIG. suitable for the circuit shown,
FIG. 10 is a transparent perspective view of the main part showing the configuration for displaying the number of recorded tracks; FIG. 10 shows the relationship of the output signal to the input signal of the counter for outputting the recording control signal in the circuit shown in FIG. 7; 11 is a timing chart showing the output relationship of the main circuit sections of the circuit shown in FIG. 7 in mode "S" (one image shot);
The figure shows the second configuration of the electric circuit system in the device of the present invention.
FIG. 13 is a circuit diagram showing a specific example of the circuit shown in FIG. 12, and FIG. 14 is a circuit diagram showing a modified example of the circuit shown in FIG. FIG. 3 is a circuit diagram showing the configuration of main parts related to the change. 11... Recording body (magnetic disk), 11c...
Recording unit where recording tracks are set, 15A; 15
A ₁ ~ 15A _o ...Detection means (detection head), 15
B; 15B ₁ to 15B _o ... Recording means (recording head), 15'; 15 ₁ ' to 15 _o '... Detection and recording means (detection-recording head), Pl... Head 15
means for mechanically shifting A-15B, 15';
CNT ₃ ...Multi-channel head 15A ₁ -15B ₁ ,
15A ₂ -15B ₂ 〃...〃Means for switching channels of 15A _o -15B _o , AG ₂ , FF ₃ , AG ₁ , FF ₂
... Components of the double recording prohibition means.

Claims (1)

[Scope of Claims] 1. A recording device that records image signals on each track on a recording medium, comprising: a recording/reproducing head whose recording/reproducing position with respect to the medium is movable; a drive means for rotationally driving the recording head; a determining means for determining the recording state of a track on the medium from the output of the recording/reproducing head; and a determining means for each screen of the image signal recorded via the recording/reproducing head. moving means for moving the recording/reproducing head in a predetermined direction on the medium so as to move the recording/reproducing head onto a track determined to be unrecorded by the moving means; a determining means for determining whether the head is further moved in the predetermined direction, and after the recording/reproducing head has recorded the N valid tracks in order to prevent recording on other than the N valid tracks, the driving means is driven by the determination by the determining means. 1. A recording apparatus comprising: control means for stopping the recording operation of the recording/reproducing head and prohibiting the recording operation of the recording/reproducing head.