Patent Abstract:
A camera apparatus includes a single release switch member. The single release switch member is for instructing an image capture operation, and selects one of a first operative state and a second operative state. The first operative state is selected when the single release switch member is pushed down to a first depth. The second operative state is selected when the single release switch member is pushed down to a second depth which is deeper than the first depth. The camera apparatus selects a recordable portion of a recording medium in response to selection of the first operative state, and generates a predetermined electrical signal if the camera apparatus selects the recordable portion of the recording medium. The camera apparatus records the image signal on the selected recordable portion if the second operative state is selected by the single release switch member, and the predetermined electrical signal is generated.

Full Description:
This is a continuation of application Ser. No. 07/766,824, filed Sep. 26, 1991 now abandoned, which in turn is a divisional application of Ser. No. 07/758,464, filed Sep. 6, 1991 now U.S. Pat. No. 5,166,840; which in turn is a continuation application of Ser. No. 07/630,375, filed Dec. 18, 1990 now abandoned; which in turn is a continuation application of Ser. No. 07/512,531, filed Apr. 18, 1990 now abandoned; which in turn is a continuation application of Ser. No. 07/187,219, filed Apr. 28, 1988 now abandoned; which in turn is a continuation application of Ser. No. 06/731,157, filed May 6, 1985, which is now U.S. Pat. No. 4,783,707, issued Nov. 8, 1988; which in turn is a continuation application of Ser. No. 06/331,795, filed Dec. 17, 1981, now abandoned; which in turn is a continuation application of Ser. No. 06/030,930, filed Apr. 17, 1979 now abandoned. 

   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   This invention relates to a picture image recording device and more particularly to a device using a recording medium which permits setting a plurality of recording tracks separately from each other for recording picture image signals on each of them. 
   2. Description of the Prior Art 
   Picture image recording devices of the type using a recording medium which permits setting a plurality of recording tracks separately from each other for recording signals of still picture images on each of the set tracks have already been proposed. 
   Since the recording device of this type is designed for recording still picture images, the basic function thereof is arranged, for example, to perform recording of one picture image each time a camera is triggered. Considering applications of the device of this type, if it is only possible to record more than just one picture image by each trigger operation, the function of the device is not always satisfactory and is thus applicable only to a limited range of purposes. 
   If the device of this type is arranged to be capable of continuously recording images on recording tracks as long as the camera trigger is persistently effected, it would be convenient for recording the images of a moving object such as recording for motion analysis or something like a so-called time-lapse filming. Such arrangement can be very advantageously usable, for example, for analyzing a golf swing, batting, a pitching motion and the like and, accordingly would find a wider range of applications by virtue or functional improvement. 
   On the other hand, the most advantageous point of the picture image recording device of this type lies in that, unlike a photographic camera that uses a silver salt film, it permits, for example: Even when recording has been made only halfway on the recording medium, the record can be taken out and put on a suitable reproducing device for appreciation of just the recorded part as desired; and, after appreciation, the recording medium can be returned to the recording device and then other picture images can be recorded on the rest of the recording medium. Or, with the fully recorded medium put on the reproducing device, some of the recorded tracks may be erased by means of an eraser and then other picture images may be recorded as replacement on the erased tracks. 
   For such usage, it is very important to provide some facility that permits accurate discernment of a recorded track and a track not recorded from each other. Without such discernment, if another picture image is recorded on the recorded track, two picture image signals would be mixed and a reproduced picture image would be hardly acceptable because, in the device of this type, it is extremely difficult to precisely align the heads of two picture image signals for synchronization and synchronism tends to be lost. 
   It is, therefore, highly advantageous for a device of this type to be provided with arrangement to accurately discern a recorded track from a track not recorded and to give a warning when a recording track on which recording is going to be performed has been already recorded; or to automatically prohibit double recording on a recorded track; or, with further advanced arrangement, to shift a track of a recording head to another track, when the track to be used for recording has been already recorded, either by mechanically shifting the head or by electrically shifting the head through change-over between head channels. Such arrangement would automatically ensure that recording can be always performed on a recording track which has not been recorded. 
   Further, a device of this type is required to have a facility for indicating the number of recorded tracks. If such indication is arranged to be made by directly detecting up to which of the recording tracks recording has been performed and to show the number of recorded tracks according to the result of such detecting, the device must have a complex structure, which then would hinder an effort to make the device compact. In another conceivable arrangement, the recording medium may be placed in a cartridge; a code marking may be attached to a part of the housing thereof every time recording is performed on a recording track; and then the number of recorded tracks may be indicated by detecting the code markings. In this case, it is an advantage that the number of recording tracks that have been recorded can be indicated when the cartridge is once taken out from the recording device halfway during a recording operation thereon and thereafter again put in the device. However, this method is not completely satisfactory because it still unnecessarily complicates the structural arrangement and also might cause an erroneous action when the device is reloaded with the cartridge. 
   As mentioned in the foregoing, the picture image recording device of the prior arts still require improvement in various points. 
   SUMMARY OF THE INVENTION 
   This invention is directed to the solution of the above stated problems and the subject matter of the invention lies in the provision of an improved picture image recording device which is of the type using a recording medium permitting to set a plurality of recording tracks separately from each other for recording picture images on each of these tracks and which is capable of meeting all of the above stated various requirements. 
   More specifically stated, it is a first object of this invention to provide a picture image recording device for recording still picture images which can be operated to record moving objects and is thus advantageously usable for many purposes. 
   To attain this object, in accordance with this invention, the picture image recording device is operable at least in two different modes including a first mode in which recording is performed on only one recording track and a second mode in which recording is performed continuously or sequentially on a plurality of recording tracks, the device being arranged to be shiftable between the two modes. 
   In a preferred embodiment of this invention which will be further described hereinafter, the device is arranged to be shiftable between two different speeds in the above stated second mode. In another embodiment, the device can be used for video recording at an ordinary video recording speed through a combined use of it with a video recording device. These arrangements further enhance the functional capability of a device of this type. 
   It is a second object of this invention to provide a picture image recording device of the above stated type having an improved feature that double recording on a recording medium, i.e. recording on a recorded track, can be effectively prevented. 
   To attain this object of the invention, the picture image recording device is provided with a detecting means which, at the time of recording a picture image signal, automatically detects whether or not the recording track of a recording medium on which the picture image signal is going to be recorded has already been recorded. 
   In this arrangement of the device, the inconvenience of having double recording is prevented by giving a warning against double recording and automatically prohibiting it with an output of the detecting means utilized therefor. Further, in the case of a preferred embodiment of the invention which will be described hereinafter, there is provided a control means which controls shifting of the track of a recording means (change-over from one recording track to another) in response to the output of the detecting means; and the recording track of the recording means is automatically shifted by the control means to a track which has not been recorded. This is very advantageous for a device of this type. 
   It is a third object of this invention to provide a picture image recording device equipped with a simple, reliable and inexpensive arrangement to automatically indicate the number of tracks of a recording medium which have been already recorded. 
   In accordance with this invention, this object is attained in the following manner: The recording device is provided with a switching means which shifts image signal recording means for one recording track to another and an indication means which indicates the number of recorded tracks in response to the shifting of the recording means. 
   In the preferred embodiments of this invention which will be described hereinafter, the switching means mechanically shifts the recording means in relation to the recording tracks while the indication means is mechanically associated with the shifting section of the recording means to indicate the number of recorded tracks; or the above stated recording means is arranged to be a multi-channel recording means which is electrically shiftable between many channels while the above stated switching means is arranged to be an electrical channel switching means and the number of recorded tracks is indicated by causing the above stated indication means to electrically respond to the output of the switching means. 
   The above and other objects and features of the invention will appear more fully hereinafter from the following description taken in connection with the accompanying drawings wherein embodiments are illustrated by way of example. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view showing the structural arrangement of an essential part of a camera incorporating a picture image recording device as embodiment of this invention. 
       FIG. 2  is a section view taken on line II-II of  FIG. 1 . 
       FIG. 3  is a plan view taken on the side indicated by line III-III of  FIG. 1 . 
       FIG. 4  is a plan view showing interrelation between a mode selection dial and a mode selection slide shown in  FIG. 3 . 
       FIG. 5  is a block circuit diagram showing the basic structural arrangement of an image pickup-video signal generation magnetic recording circuitry system which is applicable to the device of the invention. 
       FIG. 6  is a schematic view showing a CCD image sensor used as solid-state image pickup element in the circuit shown in  FIG. 5 . 
       FIG. 7  is a circuit diagram showing the arrangement of an electrical circuitry employed in one embodiment of the invented device.  FIG. 7A  is a logic circuit diagram showing the logic arrangement of a flip-flop circuit used in the circuit shown in  FIG. 7 .  FIG. 7B  shows an input-to-output relation of the flip-flop circuit shown in  FIG. 7A . 
       FIG. 8  is an enlarged oblique view showing the details of structural arrangement of a magnetic head suitable for use in the circuit shown in  FIG. 7 . 
       FIG. 9  is a perspective view showing the structural arrangement of an essential part for indicating the number of recorded tracks suitable for the circuit shown in  FIG. 7 . 
       FIG. 10  is a timing chart showing an input-to-output relation of a counter and an ADD gate used in the circuit shown in  FIG. 7  for producing control signals. 
       FIG. 11  is a timing chart showing the operation of the essential parts of the circuit shown in  FIG. 7  in a mode S (singly image shot) when a cartridge that has not been recorded at all is used. 
       FIG. 12  is a timing chart showing the operation of the essential parts of the circuit shown in  FIG. 7  in the mode S when a cartridge that has been partly recorded is used. 
       FIG. 13  is a timing chart showing the operation of the essential parts of the circuit shown in  FIG. 7  in a mode C 1  or C 2  (continuous or sequential image shot). 
       FIG. 14  is a circuit diagram showing the arrangement of an essential part in a modification example of the embodiment shown in  FIG. 7 . 
       FIG. 15  is a circuit diagram showing the arrangement of an essential part in another modification example of the embodiment shown in  FIG. 7 . 
       FIG. 16  is a circuit diagram showing the arrangement of an essential part in a further modification example of the embodiment shown in  FIG. 7 . 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Referring to the accompanying drawings, preferred embodiments of the invention are described by way of example as shown below: 
   The embodiment described here are examples where the present invention is applied to a handy camera. Referring first to  FIGS. 1-3 , a reference symbol CA indicates the camera; TL indicates a picture taking lens; a reference numeral  1  indicates a focusing ring;  2  indicates a zooming operation rod;  3  indicates a semi-transparent mirror which is provided for taking out a view finder light and is disposed obliquely within a camera body in the rear of the picture taking lens L; and  4  indicates a semi-transparent mirror provided in the path of a reflection light coming from the mirror  3  for the purpose of taking out a photometric light. A light measuring element  5  is positioned to receive a reflection light of the mirror  4 . Behind a total reflection mirror, there is arranged a view finder optical system of a known structure. A reference numeral  7  indicates an eye cup which is provided for the view finder. Behind the above stated mirror  3 , there is provided a picture taking diaphragm which is arranged to permit complete stopping in this particular embodiment. A numeral  9  indicates a CCD image sensor employed as solid-state image pickup element. In this embodiment, the image sensor is a two dimensional image pickup CCD of the known frame transfer type is employed as shown in  FIG. 6 . Further, as will be described hereinafter, in front of an image pickup part of the CCD image sensor  9 , there are disposed a lenticular lens and a color stripe filter in a known manner. There is provided a cartridge loading chamber  10  which is arranged to place therein a magnetic recording cartridge  12  containing therein a magnetic recording disc  11  in a freely rotatable manner. As shown in  FIG. 2 , the shaft  12   a  of the cartridge  12  is arranged to rotatably carry the disc  11 . In the housing of the cartridge, there are provided a central opening  12   b  which is provided for receiving a disc driving spindle  14  of the camera CA and a slot  12   c  which is arranged to receive a magnetic head  15  provided on the side of the camera CA. As shown in  FIG. 1 , the disc  11  is provided with a center hole  11   a  at which the disc is rotatable carried by the shaft  12   a.  The disc  11  is further provided with an arcuate slot  11   b  which is arranged concentrically with the center hole  11   a.  With this arrangement, the disc  11  is urged toward the central opening  12   b  by a plate spring  13  which is provided within the cartridge  12  as shown in  FIG. 2 . Further, as indicated by a numeral  10   a  in  FIG. 2 , the rear part of the cartridge loading chamber  10  is recessed to permit insertion of the cartridge  12  into the cartridge loading chamber  10  with a lid  16  of the chamber opened in an oblique the cartridge, the cartridge is lodged in place in a normal posture with the spindle  14  inserted into the central opening  12   b  and the magnetic head  15  into the slot  12   c  respectively. 
   Then, the tip of the head  15  is in contact with a magnetic recording part  11   c  of the disc  11 . The recording part  11   c  can be set by arranging thereon a plurality of, say, 40 recording tracks in a state of being separated from each other. Each of the recording tracks is arranged to permit recording thereon magnetic signals for one frame of a still picture as will be further described hereinafter. The disc  11  itself has a flexibility to receive the head pressure of the head  15  with the resilience of the disc  11 . With the loading chamber lid  16  closed, the cartridge  12  is fixedly and correctly set in place by the plate springs  17  and  18  shown in  FIG. 12 . The disc driving spindle  14  is provided with a driving pin  14   a  which is engageable with the arcuate slot  11   b  provided in the disc  11  and the spindle  14  is connected to the shaft  19   a  of a fly wheel  19 . The fly wheel shaft  19   a  is borne by a bearing metal member  20  at a boss part  21  of the camera frame to have no rotational chattering nor thrust chattering. This arrangement is important because the image recording performance of the device would be greatly affected by such chattering of this shaft  19   a.  There is provided a motor Mo which is arranged to rotate the fly wheel  19 . Because an output pulley  22  of the motor Mo and the fly wheel  19 , there is provided a rubber belt  23 . With a driving system arranged in this manner, the disc  11  is driven to rotate in the direction of an arrow C indicated in  FIG. 1 . A numeral  25  indicates a head carrying member which is arranged to hold the above started head  15  at its bent arm part  25   a  provided at the fore end thereof. The head carrying member  25  is carried by a supporting rod  24  to be slidable along the rod  24 , which is attached to a part of the camera frame along the slot  12   c  of the cartridge  12 . A spring  26  urges the head carrying member  25  in the direction of an arrow D indicated in  FIG. 2 . The head carrying member  25  is provided, at a part thereof, with ratchet teeth  25   b  which are formed to define spacing between the magnetic recording tracks in the recording part  11   c  of the magnetic recording disc  11 . Further, with the head carrying member  25  displaced to an extreme and position thereof in the direction of the arrow D indicated in  FIG. 2  by the spring  26 , the magnetic head is arranged to be in a position corresponding to the outermost peripheral track of the recording part  11   c  of the disc  11 . The number of teeth of the ratchet  25   b  is determined in accordance with the number of tracks set on the disc  11  and, in this embodiment, the number of the ratchet teeth is 41 for the 40 tracks of the disc. Accordingly, the head  15  has a total of 41 setting positions. A numeral  27  indicates a ratchet feeding claw which is arranged to shift the head carrying member  25  tooth by tooth against the force of the spring  26  in the direction reverse to the direction of the arrow D. The ratchet feeding claw  27  is urged in the direction of engaging with the ratchet teeth  25   b  by a spring  28  and is also is linked with a movable armature Am of a plunger Pl. When the plunger is energized, the armature Am is arranged to thrust forward by one stroke which shifts the above stated head carrying member  25  exactly as much as one tooth against the force of a spring  29  in the direction opposite to the arrow D. The head carrying member  25  is arranged to be retained in the shifted position by a lock claw  30 , which is pivotally carried to be freely rotatable on a shaft  31  attached to a part of the camera frame and is urged by a spring  32  in the direction of engaging the ratchet teeth  25   b.  When the loading chamber lid  16  is opened, the head carrying member  25  is caused by a reset member  33  to automatically return to an initial position in which the head  15  is facing the outermost track of the disc  11 . The head portion of the reset member  33  is formed into a tapered or circular shape into a hook part and the reset member  33  is attached to a part of the chamber lid  16  to have its hook part engage with the tail end  30   b  of the lock claw  30 . Therefore, when the lid  16  is opened, the reset member  33  causes the lock claw  30  to rotate counterclockwise as viewed on the drawing against the force of a spring  32 . At that time, the head part  30   a  of the force end of the lock claw  30  pushes a protrusion  27   a  of the fore end of the feed claw  27  to rotate the feed claw  27  clockwise as viewed on the drawing on a point at which the feed claw  27  is linked with the armature Am. Thus, both the lock claw and the feed claw are disengaged from the ratchet teeth  25   b.  By this, the head carrying member  25  is automatically returned into its initial position as mentioned in the foregoing. This reset member  33  has some flexibility and, when the lid  16  is opened to a degree more than a given angle, the reset member  33  is disengaged from the lock claw  33  and, when the lid  16  is closed, the head part of the reset member  33  comes to contact and override the tail end  30   b  of the lock claw  30  to bring the hook part thereof into engagement with the tail end  30   b.  It is therefore advantageous to have the edge of the tail end  30   b  of the lock claw  30  rounded as shown in  FIG. 2 . Further, although it is not clearly shown in the drawing, the lock claw  30  is prevented from abutting upon the fore end face of the feed claw  27  by disposing it a little away from the feed claw  27  in the direction perpendicular to the surface of paper on which  FIG. 2  is drawn. Meanwhile, the protrusion  27   a  of the fore end of the feed claw  27  is somewhat extended in the direction perpendicular to the paper surface to have this extended part engageable with the head part  30   a  of the lock claw  30 . 
   Further, in  FIGS. 1 and 3 , a numeral  34  indicates a camera trigger button which is of the so-called two step trigger type; and  35  indicates a grip part which is arranged to contain a power source battery E therein. In  FIG. 1 , a symbol EU indicates an electrical circuit unit the details of which will be described hereinafter. In  FIG. 3 , a numeral  36  indicates a mode selection dial which is arranged to be shiftable between positions of indices “S”, “C 1 ”, “C 2 ” and “MV”. The index “S” indicates a single picture frame shot; C 1  indicates continuous picture frame shots which are performed, for example, at a rate of about 3.3 picture frames per second; and MV indicates picture taking performed at a rate of 30 picture frames per second, which corresponds to motion picture shots at a normal video recording speed. The term “shot” as used herein means a picture taking operation. Further, as will be further described hereinafter, one picture frame is composed of two field signals. A numeral  37  indicates a slide which is slidable for selection between automatic shifting and manual shifting of the head  15  in relation to the recording tracks for the single picture frame shot and which is thus shiftable between indices “A” and “M”. The index “A” A numeral  38  indicates a push button which is provided for manual shifting of the head  15  when the manual shift mode M has been selected. The push button  33  permits manual operation of the plunger Pl through circuit arrangement as described hereinafter. In the mode C 1 , C 2  or MV, it is evidently absurd to manually shift the head  15 . Therefore, in this embodiment, the slide  37  is inhibited from shifting from “A” to “M” in the mode C 1 , C 2  or MV and is allowed to shift to “M” in the mode S only. When the mode is shifted from “S” to “C 1 ”, “C 2 ” or “MV” while the slide  37  is in the position “M”, the slide  37  is automatically reset into the position “A” by a can  39  which is interlocked with the dial  36 . This cam  39  is disposed to face a follower part  40   a  of a plate  40  which is arranged for pin-slot engagement and on which the slide  37  is provided. A numeral  41  indicates a click stop spring. The mode symbols marked on the cam  39  in parentheses indicate the region of the cam corresponding to each mode. 
   Again referring to  FIG. 3 , there is provided a jack  42  for taking out a video signal (NTSC signal) to the outside. The jack  42  permits to connect an ordinary VTR device thereto and is usable particularly in the mode MV. As mentioned in the foregoing, the number of picture frames recordable on the disc  11  is limited to  40  or thereabout. If a motion picture is recorded on the disc  11  at a standard video recording speed, the recording will not last more than one second or thereabout. The number of recording tracks may be increased. However, such increase is evidently limited. It is absurd to record a motion picture on a disc to begin with. With the jack  42  provided in combination with the mode MV, therefore, motion picture recording can be performed over a long period of time in combination with an ordinary known VTR (video tape recording) device. This arrangement further broadens the functional capability of the camera. There is also provided a jack  43  for remote control. A remote controller is connected to this jack  43 . 
   The structural arrangement of the essential parts related to this invention in the camera CA is as described in the foregoing. The details of the circuit arrangement in the above stated electrical circuit until HU will be understood from the following description: 
   In  FIG. 5  which shows the arrangement of an image pickup—video (NTSC) signal generation—magnetic recording system, a reference numeral  44  indicates an oscillator circuit which generates clock pulses of a relatively high frequency of the order of MHz. A numeral  45  indicates a synchronization control circuit which produces various synchronization control signals required for synchronization control over the image sensor  9  and the circuitry shown here in accordance with the clock pulses from the oscillator circuit  44 . As shown in  FIG. 6  in a modelizing manner, the CCD image sensor  9  comprises an image pickup part (a photo sensitive part)  9   a  which is composed of many photo sensor elements arranged in a matrix like manner: a memory part  9   b  which takes in an electric charge cor-esponding to the brightness of each of the picture elements accumulated at the image pickup part  9   a  and which thus stores the electric charge in a memory cell at an address corresponding to the address of each element; and an analog shift register  9   c  which is provided for transferring the stored electric charges in a time serial manner. As well known, with the exception of the image pickup part  9   a,  all components of the image sensor  9  are part  9   a,  there are arranged a color stripe filter  48  and a lenticular lens  49 . The synchronization control circuit  45  supplies the CCD image sensor  9  with driving signals Pa including a signal for controlling the accumulation of electric charges at the image pickup part  9   a;  clock pulses for transferring the accumulated electric charges of the image pickup part  9   a  to the memory part  9   b  within an extremely short period of time at a predetermined timing, for example every 1/60 sec. (which corresponds to the timing of a vertical synchronization signal); and clock pulses for time serially producing all of the electric charges taken in the memory part  9   b  through the shift register  9   c  within a period of 1/60 second which corresponds to the time of 1 V—1 vertical scanning period of television (i.e. for read-out of the stored electric charges). Further, although it is not shown in  FIG. 6 , it goes without saying that the electric charges that are transferred by the shift register  9   c  are eventually obtained in a state of having been converted into voltages or currents or the like. Further detailed description is omitted herein as the frame transfer type CCD image sensor of this type has already been well known. 
   Returning now to  FIG. 5 , numerals  50  and  51  indicate sample-hold circuits which sample-hold the output of the CCD image sensor  9 . These sample-hold circuits are arranged to be controlled by control signals Pb (sampling signals) from the synchronization control circuit  45 . A numeral  52  indicates a video signal (NTSC signal) generating circuit which is composed of: A brightness signal producing circuit  53  which produces a brightness signal Y in accordance with the output of the sample-hold circuit  50 ; a color signal producing circuit  54  which produces primary color signals R and B in accordance with the output of the sample-hold circuit  51 ; and an encoder  55  which produces a NTSC signal (a color video signal of NTSC system) based on the signals Y, R and B received from these circuits  53  and  54 . As well known, the synchronization control circuit  45  supplies synchronization control signals Pc and Pd to the color signal producing circuit  54  and the encoder  55 . The video signal generating circuit of this type has been thoroughly known through prior art disclosure such as a Japanese patent application laying open publication No. SHO 53-34417. Therefore, illustration of the circuit herein is limited to functional blocks. A numeral  56  indicates a magnetic recording circuit for recording video signals. The magnetic recording circuit  56  is composed of a low pass filter  57 , a pre-emphasis circuit  58 , a frequency modulation circuit  59 , a high pass filter  60 , a band pass filter  61 , a frequency converter circuit  62 , a low pass filter, a mixer circuit  64  and a recording amplifier  65 . The magnetic recording circuit  56  is thus arranged to be also-called chrominance subcarrier low conversion multiplex recording system. The operation of the circuit of this system is well known and does not require detailed description here. Briefly stated, when the NTSC signal, i.e. a combined color video signal, is obtained from the above stated video signal generating circuit  52 , a brightness signal Y and a chrominance subcarrier signal fc of 3.58 MHz are separated from the video signal through the low pass filter  57  and the band pass filter  61  respectively. The separated brightness signal Y is pre-emphasized by the pre-emphasis circuit  58  and, after it is frequency modulated by the frequency modulation circuit  59 , the signal Y is supplied to the mixer circuit  64  as frequency modulated brightness signal with a part of its lower-side band wave removed through the high pass filter  60 . On the other hand, the chrominance subcarrier signal fc is balance modulated at the frequency converter circuit  62  by a signal Pe (fn) coming from the synchronization control circuit  45 . Then, through the low pass filter  63 , a difference signal thereof, i.e. a low conversion chrominance subcarrier signal f s =f n −f c  is taken out and supplied to the mixer circuit  64 . The mixer circuit  64  then mixes the color signal carried by this low conversion chrominance subcarrier f s  with the frequency modulated (FM) brightness signal from which a part of its lower-side band wave has been removed to obtain a mixed signal (a VTR signal). The mixed signal is applied to the head  15  through the amplifier  65  to perform magnetic recording of it on a recording track of the disc  11 . 
   Next, referring to  FIG. 7 , the structural arrangement described in the foregoing will be more fully understood from the following description of a concrete example of the electrical circuit system: 
   In the first example given here, a combination type magnetic head is employed as the above stated magnetic head  15 . The combination magnetic head is composed of a detection head  15 A which is provided solely for the purpose of detecting whether or not a magnetic recording track of the disc  11  on which a picture image signal is going to be recorded (hereinafter will be called “picture recording”) has already been recorded with a picture and a recording head  15 B which is provided solely for the purpose of recording. When the disc  11  rotates in the direction of the arrow C shown in  FIG. 1 , the detection head  15 A is arranged to be always positioned ahead of the recording head  15 B. In recording, when the track has been already recorded, double recording is prevented by this arrangement to ensure correct recording on a track that has not been recorded. 
   In  FIG. 7 , a reference symbol E indicates the circuit power source mentioned in the foregoing; and SWE indicate a normally closed type end switch which is arranged to be opened upon completion of picture recording on all of the tracks of the disc  11 . The switch SWE is connected in series with the circuit power source E. As for the arrangement required for opening this end switch SWE, the use of the arrangement shown in  FIG. 9  or something like that will be advantageous. In the case of  FIG. 9 , there is provided a track count member  72  which is arranged to sway in response to the feeding action of the head carrying member  25  with its tail end pivotally connected to a part of the camera frame and with a pin  71  on the head carrying member  25  engaged with a slot  72   a  provided in the middle part of the count member  72 . A pointer  73  which is attached to the fore end of the count member  72  indicates the number of recorded tracks on a track number indicating graduation plate  75  which is disposed inside a window  74 . Further, when the head carrying member  25  is shifted to the left as viewed on the drawing to an extent as much as the total number of the teeth of the ratchet teeth  25   b,  i.e. when it comes away from the innermost circular track of the recording part  11   c  of the disc  11  and is shifted further inward by one tooth, the end switch SWE is opened by a switch opening protrusion  76  provided on the fore end of the count member  72 . 
   A PHP switching transistor Tr 1  has its emitter side connected to the end switch SWE. A symbol SWR 1  indicates a normally open type first step trigger switch which is arranged to be turned on by the first step stroke of the above stated trigger button  34  and which is connected to the base of the transistor Tr 1 . A symbol SW 1  indicates a change-over switch which is shiftable between fixed terminals S, C 1 , C 2  and MV in response to the above stated mode selection dial  36 . The movable contact piece of the switch SW 1  is connected to the collector side of the transistor Tr 1 . The fixed terminals S, C 1  and C 2  are connected in common. A symbol PUC indicates a power up clear circuit which produces a single pulse (a power up clear signal) when the power source is turned on; DFC indicates a differentiation circuit which produces a negative single pulse when its terminal a is connected to the minus side of the power source E; SW 2  indicates a change-over switch which is shifted between fixed terminals S, C 1 , C 2  and MV in response to the mode selection dial  36 , the terminals S and MV being neutral terminals, the terminals C 1  and C 2  being connected to the output terminal b of the above stated differentiation circuit DFC and the movable contact piece thereof being connected to the terminal a of the differentiation circuit PFC; and FF 4  indicates a SR-flip-flop which receives the output of the power up clear circuit PUC at its react input terminal R and receives, at its set input terminal S, the output of an inverter IV 1  which is provided for producing the output of a Schmidt circuit SMC (will be described hereinafter) by inverted logic. The Q output of the SR-flip-flop is arranged to be supplied to the base of an NPN switching transistor Tr 4  the collector side of which is connected to the movable contact piece of the above stated change-over switch SW 2 . A symbol SWR 2  indicates a second step trigger switch which is arranged to be turned on by the second step stroke of the above stated trigger button and is connected to the emitter of the transistor Tr 4 ; and FF 1  indicates a SR-flip-flop which is arranged to receive, at its set input terminal S, the output of the inverter IV 2  provided for producing the output of the above stated differentiation circuit DFC by inverted logic and is arranged to receive, at its reset terminal P, the output of an OR gate OG 1  which obtains a logical sum of the output of the above stated power up clear circuit PUC and the output of the Schmidt circuit SMC which will be described hereinafter, the SR-flip-flop FF 1  thus being arranged to maintain power supply. The  Q  output terminal of the flip-flop is connected to the base of the above stated transistor Tr 1 . When the second step trigger switch SWR 2  is turned on under a condition in which the output of the OR gate OG 1  is low and the  Q  output of the flip-flop FF 4  is high (i.e. a condition in which the transistor Tr 4  is rendered conductive with the second step trigger switch SWR 2  turned on), the flip-flop FF 1  is set by a high level output of the inverter IV 2  and the  Q  output of the flip-flop FF 1  becomes low. Then, since the  Q  output terminal is connected to the base of the transistor Tr 1 , the transistor Tr 1  is held conductive by the depression of the trigger button  34  to the second step stroke and does not become nonconductive when the trigger button  34  is instantly released from depression. The transistor Tr 1  is released from this state of being held conductive when the detection head  15 A detects a recorded track as will be described hereinafter. Therefore, at this time, if the first step trigger switch SWR 1  is off, the transistor Tr 1  becomes nonconductive to cut off power supply to the circuit system. 
   There is provided a SR-flip-flop FF 2  for recording control. The set input terminal S of the flip-flop FF 2  receives the output of an OR gate OG 2  which obtains a logical sum of the output of the above stated power up clear circuit PUC and the output of the Schmidt circuit SMC while the reset input terminal R of the flip-flop FF 2  is arranged to receive the output of an AND gate AG 1  which obtains a logical product of the output of a delay circuit DLC which will be described hereinafter and the Q output of a flip-flop FF 3  which will also be described hereinafter. A symbol CNT 1  indicates a 4-bit binary counter of a pulse fall synchronization type. The counter CNT 1  counts the output pulses ( FIG. 10 , ( b )) of an inverter IV 3  which produces, by inverted logic, the pulses Ff ( FIG. 10 , ( a )) at a timing ( 1/60 sec.) corresponding to the vertical synchronization signal from the synchronization control circuit  45  shown in  FIG. 5 . With this counting performed, the output terminals A, B, C and D of the counter CNT 1  respectively produce pulse signals as represented at ( c ), ( d ), ( e ) and ( f ) in  FIG. 10 . A symbol AG 5  indicates an AND gate which obtains a logical product of the outputs B and C of the above stated counter CNT 1 . The output of the AND gate AG 5  is as represented by ( g ) in  FIG. 10 . Another AND gate AG 6  is arranged to obtain a logical product of the outputs B, C and D of the counter CNT 1 . The output of the AND gate AG 6  is as represented by ( h ) in  FIG. 10 . Therefore, assuming that the period of the output pulse Pf of the above stated synchronization control circuit  45  represented by ( a ) in  FIG. 10  is 1/60 sec., the period of the output A of the counter CNT 1  is 1/30 sec., that of the output B of the counter is 1/15, that of the output C of the counter is 1/7.5 and that of the output D of the counter is 1/3.75. Then, since the time, at a high level, of each of the output B of the counter CNT 1  and outputs of the AND gates AG 5  and AG 6  is 1/30 sec., these outputs are usable as recording control signal in the modes S, C 1  and C 2  respectively. The output B of the counter CNT 1  and the outputs of the AND gates AG 5  and AG 6  are arranged to be selectable in the modes S, C 1  and C 2  by the change-over switch SW 3  which is responsive to the mode selection dial  36 . Although the period of the output of the AND gate AG 5  which is selected in the mode C 1  is 1/7.5 sec. and the period of the output of the AND gate AG 6  which is selected in the mode C 2  is 1/3.75 sec., these periods are arranged in the circuit of this embodiment to be about 6 picture images/sec. in the mode C 1  and about 3.3 picture images/sec. in the mode C 2  for effecting continuous shots. 
   Further, each of the output B of the counter CNT 1  and outputs of the AND gates AG 5  and AG 6  selected by the switch SW 3  is supplied to the output stage (i.e. the amplifier circuit  65  shown in  FIG. 5 ) of the image pickup—video signal generation—magnetic recording system circuit  69  which is arranged as shown in  FIG. 5  and also to the recording control analog switch ASW which is provided between the recording head  15 B and the circuit  69  to perform recording control thereby. The clear terminal CLR of the above stated counter CNT 1  is arranged to receive the Q output of the above stated flip-flop FF 2 . Accordingly, when the Q output of the counter CNT 1  is high, the counter CNT 1  is kept in a state of being cleared. The counter CNT 1  thus counts the output pulses of the inverter IV 3  only when the Q output of the flip-flop FF 2  is low. 
   A symbol La 2  indicates a display lamp which is caused to light up by the PNP switching transistor Tr 2  arranged to receive the Q output of the flip-flop FF 2  at its base. In other words, the display lamp La 2  is caused to light up to indicate that recording is being performed when the counter CNT 1  is performing a counting operation with the Q output of the flip-flop FF 2  being low. A symbol AP indicates an amplifier which amplifies the output of the above stated detection head  15 A; C indicates a DC out capacitor; HIC indicates a rectifying integration circuit HIC which rectifies and integrates an AC signal component, i.e. a video signal component in the output of the amplifier AF; and SNC indicates a Schmidt circuit which is responsive to the output of the rectifying integration circuit HIC. The output of the Schmidt circuit becomes high when the track on which recording is going to be performed has been already recorded and become low when the track has not been recorded. The output of the Schmidt circuit SMC is supplied to the AND gate AG 3  and the OR gates OG 1 , OG 2  and OG 3  and, through the inverter IV 1 , is supplied by inverted logic also to the AND gate AG 2  and the set input terminal S of the flip-flop FF 4 . A symbol CNT 2  indicates a 2-bit binary counter of a pulse fall synchronization type which receives and counts the output pulses from the above stated inverter IV 3 . The higher bit output, i.e. the output B, of the counter CNT 2  is arranged to be used for driving the above stated plunger Pl and is supplied to the other input terminal of the above stated AND gate AG 3 . The output of the AND gate AG 3  is supplied to the base of the NPN switching transistor Tr 3 . The output B of the counter CNT 2  has a high level duration period of 1/30 sec. in the same manner as the output B of the other counter CNT 1 . Therefore, with a minimum energization period required for driving the plunger Pl arranged to be 15 to 20 msec. or thereabout, the output B of the counter CNT 2  gives a sufficient pulse for driving the plunger Pl. Further, the time constant of the above stated integration circuit HIC is set at a sufficient value of time, say, 30 msec. or thereabout for driving the plunger Pl. There is provided a display lamp La 3  which lights up when the track going to be recorded has been already recorded in the mode S-M, i.e. in the mode of single picture image shot with manual shifting of the head. In the mode M, the display lamp La 3  is connected to the collector of the transistor Tr 3  by the switch SWM 1  which is responsive to the above stated slide  37 . In the mode A, the switch SWM 1  connects the plunger Pl to the collector of the transistor Tr 3 . A symbol SWP indicates a push switch which is turned on by the above stated push button  33 ; and SWM 2  indicates a switch which, in the mode M, connects the switch SWP to the plunger Pl in response to the above stated slide  37 . 
   A motor control circuit MCC is provided for constant speed control of the motor Mo. In this embodiment, the rotation speed of the motor Mo is controlled by the control circuit MCC to have the disc  11  rotate at a speed of 1,800 r.p.m. so that signals for one frame, i.e. for two fields, are recorded on a track by every rotation of the disc  11 . A delay circuit DLC is provided for having a delay time corresponding to a period of time (50-100 msec.) required for building up of the speed of the motor Mo. The output of the delay circuit is supplied to the AND gate AG 1 . A symbol FF 3  indicates a SR-flip-flop. The set input terminal S of the flip-flop FF 3  receives the output of the AND gate AG 2  which obtains a logical product of the Q output of the flip-flop FF 1  and the output of the inverter IV 1 . The reset input terminal R of the flip-flop FF 3  receives the output of the OR gate OG 3  which obtains a logical sum of the output of the above stated power up clear circuit PUC and the output of the Schmidt circuit SMC. The Q output of the flip-flop FF 3  is supplied to the AND gate AG 1 . A symbol PMC indicates a light measuring circuit which determines a correct diaphragm aperture value based on the output of a light measuring element  5  and electric charge accumulation time (i.e. integrated time of picture element signals) obtained at the image pickup part  9   a  of the image sensor  9 . The light measuring circuit PMC is arranged to receive power supply together with the above stated circuit  69  through the diode D 3  or D 4  irrespective of the mode selection of the mode selection dial  36 , i.e. irrespective as to which of the mode terminals is in connection with the switch SW 1 . In this embodiment, the electric charge accumulation time is defined solely by the timing of the read-out starting pulse (start pulse) included in the sensor driving signal Pa which is produced by the synchronization control circuit  45 . According to the example described in the foregoing, for example, the electric charge accumulation time is fixed to 1/60 sec. or thereabout. In this case, therefore, fixed information on this time is given to the light measuring circuit PMC. Incidentally, this time corresponds to film exposure time in an ordinary camera that uses a silver salt film. Accordingly, the same structural arrangement as a known light measuring circuit of a film camera is usable as this light measuring circuit PMC. A reference numeral  66  indicates a diaphragm driving means such as a meter or motor which adjusts a diaphragm  8  to a correct aperture value in response to the output of the light measuring circuit PMC. The output shaft of the diaphragm driving means is connected to the diaphragm  8 . The diaphragm  8  is arranged to permit so-called complete stopping for the purpose of preventing so-called “sticking” of the CCD image sensor  9 . As for arrangement required for such complete stopping, in the case of using a meter as diaphragm driving means  66 , a spring may be arranged to act on the moving coil thereof such that the diaphragm  8  is kept in a completely stopped state when the coil is not energized. Where a motor is employed as the driving means  66 , a condensing means such as a capacitor may be connected to the motor to completely stop the diaphragm  8  by forcedly driving it with the holding power of this condensing means imparted when the output from the light measuring circuit is cut off. A numeral  67  indicates a graduation member for indicating aperture values. The member  67  is arranged to be driven together with the diaphragm  8  by the above stated diaphragm driving means  66  and is prepared, for example, by marking graduations of aperture values on a transparent film or the like. The member  67  is disposed within a view finder of the camera and is arranged to show an adjusted value of aperture of the diaphragm by coincidence of a graduation mark with a fixed index  68 . A symbol La 1  indicates a lamp which is provided for illuminating the above stated graduation member  67  from behind it and is connected to the diodes D 3  and D 4 . The lamp La 1  is arranged to receive power supply to light up with the transistor Tr 1  energized irrespective of the mode selected by the mode selection dial. Therefore, in addition to its function of illuminating the graduation member  67 , the lamp La 1  functions also to indicate that the trigger button  34  is depressed to the first step thereof. 
   In the arrangement described in the foregoing, the circuit  69 , the light measuring circuit PMC and the lamp La 1  are arranged to receive power supply with the transistor Tr 1  rendered conductive energized irrespective of the mode position in which the mode selection dial  36  is set. On the other hand, with the exception of them, other circuits are arranged to receive power supply, with the transistor Tr 1  rendered conductive, only when the mode selection dial  36  is in the mode position, S, C 1 , or C 2 . Further, each of the SR-flip-flop circuits FF 1 -FF 4 , which are used in the circuit shown in  FIG. 7 , has a logic arrangement made by a combination of two NOR gates NOG 1  and NOG 2  as shown in  FIG. 7A . The input-to-output relation of the flip-flop circuit is as shown in  FIG. 7B . 
   A jack which is provided for supplying the NTSC signal to the outside is connected to the circuit  69  and, more specifically stated, to the output stage of the video signal generation circuit  52  shown in  FIG. 5 . A remote jack  43  is connected through diodes D 1  and D 2  in parallel with the switches SWR 1  and SWR 2 . 
   The camera which has the structural arrangement as described in the foregoing operates—in the following manner: As mentioned in the foregoing, the camera permits selection of any of the five operation modes including the mode S-A (single picture image shot—automatic head shifting), the mode S-M (single picture image shot—manual heading shifting), the mode C 1  (continuous shots at a rate of 7.5 picture images/second), the mode C 2  (3.75 picture image/sec. continuous shots) and the mode MV (motion picture shots at a VTR speed using a VTR device). To facilitate understanding, the mode S-A is first described with reference to the timing chart of  FIG. 11  as follows: Let us assume that the camera CA is loaded with a recording disc  11  with none of the recording tracks thereof having been recorded. The head  15  is set in its initial position as mentioned in the foregoing. The end switch SWE is therefore on. Under this condition, when the dial  36  is set in the mode position S, the switch SW 1  is turned on; the switch SW 2  comes to be in an open state while the switch SW 3  comes to be connected to the output terminal B of the counter CNT 1 . Then, when the slide  37  is set in the position of the mode A, the switch SWM 1  is connected to the side of the plunger Pl while the switch SWM 2  comes to be in an open state and the camera CA is set in the mode S-A. Under this condition, the operator directs the camera CA toward a desired object while peeping into the view finder and, when he depresses the trigger button  34  to the first stroke, the first step trigger switch SWR 1  is turned on to render the transistor Tr 1  conductive thereby. Accordingly, the light measuring circuit PMC comes to work and the diaphragm  8  is adjusted from its completely stopped state to a correct aperture value. Meanwhile, the lamp La 1  lights up to illuminate the graduation plate  67  and the motor Mo starts to cause the disc  11  to rotate. This shown in  FIGS. 11(   a ), ( b ), ( d ), ( e ) and ( f ). Further, when the transistor Tr 1  is rendered conductive, the power up clear circuit PUC produces pulses as shown in  FIG. 11(   g ) to reset thereby the flip-flop circuits FF 1 , FF 3  and FF 4  and to set the flip-flop FF 2 . Then, the Q output of the flip-flop FF 1  and the Q output of the flip-flop FF 2  become high as shown in  FIGS. 11(   k ) and ( l ). On the other hand, with the transistor Tr 1  rendered conductive, the circuit  69  receives power supply and begins to drive the CCD image sensor  9 , which then begins the image pickup—video signal generation—VTR signal producing operation. At this time, the synchronization control circuit  45  produces pulses Pf of timing which corresponds to the vertical synchronization signal as represented by  FIG. 11(   o ). The pulses Pf are applied to the counters CNT 1  and CNT 2  through the inverter IV 3 . However, since the Q output of the flip-flop FF 2  at this time is high, the counter CNT 1  is in a cleared state, i.e. kept in a state of being incapable of counting. Thus, the pulses are not counted by the counter CNT 1 . Accordingly, the output B of the counter CNT 1  is low as shown in  FIG. 11(   p ). The analog switch ASW is, therefore, remains off. On the other hand, the counter CNT 2  then begins to count the output pulses from the inverter IV 3 . Further, with the transistor Tr 1  rendered conductive when a period of time anticipated to correspond to time required for the motor Mo before it comes to build up to a normal speed has elapsed, the output of the delay circuit DLC becomes high as shown in  FIG. 11(   h ) and, accordingly, one input to the AND gate AG 1  then becomes high. 
   At this time, in the output of the detection head  15 A, there appears no AC signal component because the disc  11  has not been recorded at all. Therefore, the output level of the integration circuit HIC is below a predetermined level and, accordingly, the output of the Schmidt circuit SMC is low as shown in  FIG. 11(   g ). Therefore, the plunger Pl is not energized. The heads  15 A and  15 B are in their initial positions where they are in contact with the outermost track of the recording part  11   c  of the disc  11 . Further, since the output of the inverter IV 1  becomes high at this point of time, one input to the AND gate AG 2  becomes high. The flip-flop FF 4  is set and the Q output of it becomes high. 
   Under this condition, when the trigger button  34  is depressed to the second step ( FIG. 11(   a )), the second trigger switch SWR 2  is turned on, as shown in  FIG. 11(   c ), to render the transistor Tr 4  conductive. This causes the differentiation circuit DFC to produce a negative pulse as shown in  FIG. 11(   h ). Accordingly, as shown in  FIG. 11(   i ), the inverter IV 2  comes to produce high pulses. By this, the flip-flop FF 1  is set and, as shown in  FIG. 11(   j ), the Q output of the flip-flop FF 1  becomes high. The output of the AND gate AG 2  thus becomes high at this point of time to set the flip-flop FF 3  and the Q output of the flip-flop FF 3  becomes high as shown in  FIG. 11(   m ). This causes both of the two inputs to the AND gate AG 1  to become high thus to make the output thereof high at this point of time. Accordingly, the flip-flop FF 2  is reset and the Q output of it is inverted to become low. The counter CNT 1  is then released from its cleared state and begins to count input pulses. 
   Further, when the flip-flop FF 1  is set by the high pulse from the inverter IV 2 , the Q output of the flip-flop FF 1  becomes low as shown in  FIG. 11(   k ). Since this causes the transistor Tr 1  to be kept in a conductive state, the circuit system continues its operation because power supply thereto is not cut off even if the trigger button  34  is released from its state of being depressed at this point of time. 
   When the counter CNT 1  begins to count input pulses under this condition and when the B output of it becomes high as shown in  FIG. 11(   p ), the analog switch ASW is turned on thereby and the output of the amplifier circuit  65  shown in  FIG. 5  is supplied to the recording head  15 B to cause it to perform magnetic recording of signals for one frame of the picture image of an object on the outermost track of the disc  11 . The B output of the counter CNT 1  arranged in this embodiment is obtained by frequency dividing by two the pulses Pf of timing corresponding to the vertical synchronization signal ( FIG. 10(   a )) from the synchronization control circuit  45  as has already been described with reference to  FIG. 10 . The high level period of time of the B output of the counter CNT 1  is two periods of the pulses Pf, i.e. 1/30 sec. Meanwhile, in the circuit system shown in  FIG. 5 , the output of the image sensor is read out, and accordingly the field signal is produced, continuously twice in a repeated manner within this length of time 1/30 sec. Therefore, a signal of 2 fields=1 frame is magnetically recorded on the track of the disc  11 . As already mentioned, therefore, the motor control circuit MCC is arranged to control the rotating speed of the motor Mo in such a way as to have the disc  11  rotated at the rate of 1,800 r.p.m. 
   When 1/30 second has elapsed after the B output of the counter CNT 1  became high as shown in  FIG. 11(   p ), the B output again becomes low to turn off the analog switch ASW. During this period, a signal for one frame is magnetically recorded on the track of the disc  11  in the  2  fields—1 frame manner. Since the detection head  15 A is disposed ahead of the recording head  15 A as mentioned in the foregoing, when recording of 1 frame has been completed, the magnetic signal recorded by the recording head  15 B is picked up by the detection head  15 A. Accordingly, in the output up by the detection head  15 A, there appears an AC signal component, i.e. a video signal component, and this causes the output level of the integration circuit HIC to become higher than a predetermined level. This in turn makes the output of the Schmidt circuit SMC high as shown in  FIG. 11(   g ). Then, the flip-flop FF 3  is reset thereby and the Q output of the flip-flop FF 3  becomes low as shown in  FIG. 11(   m ). Accordingly, the reset input R of the flip-flop FF 2  becomes low and the flip-flop FF 2  is set by the high level output of the Schmidt circuit SMC. The Q output of the flip-flop FF 2  then becomes high as shown in  FIG. 11(   l ). The counter CNT 1  is cleared by this and becomes incapable of counting. The B output of the counter CNT 1  thus becomes as shown in  FIG. 11(   p ) and is low after completion of recording. Accordingly, the analog switch ASW is turned off. With the output of the Schmidt circuit SMC having become high, the B output of the counter CNT 2  is applied to the base of the transistor Tr 3  through the AND gates AG 3  as shown in  FIG. 11(   s ). The transistor Tr 3  is rendered conductive thereby to energize the plunger Pl. Accordingly, the head carrying member  25  is moved forward by the feed claw  27  as much as one tooth of the ratchet teeth  25   b.  The heads  15 A and  15 B are shifted by this to a second track. Since the second track has not been recorded in this case, the AC signal component disappears from the output of the detection head  15 A as the shifting of the heads  15 A and  15 B is effected to the second track. After a predetermined period of time, therefore, the output level of the integration circuit becomes lower than the predetermined level and, accordingly, the output of the Schmidt circuit SMC then becomes low as shown in  FIG. 11(   g ). 
   When the output of the Schmidt circuit SMC becomes high, the flip-flop FF 1  is reset and the Q output of it becomes low as shown in  FIG. 11(   j ). Since the flip-flop FF 1  will not be set thereafter as long as a high pulse is not produced from the inverter IV 2 , the flip-flop FF 3  is not set thereafter. Accordingly, the operation of the camera CA is stopped or suspended in a state of having completed the shifting of the heads  15 A and  15 B to the next non-recorded track. Under this condition, if the depression of the trigger button  34  is eased back to its first stroke to open only the second step trigger switch SWR 2  and if, after that, the trigger button  34  is again depressed to the second step stroke to turn on the second step trigger switch SWR 2 , the differentiation circuit DFC again comes to produce negative pulses. Then, the flip-flop FF 1  is again set by the high pulse coming from the inverter IV 2  to allow recording on the non-recorded track. Upon completion of recording on this non-recorded track, the heads  15 A and  15 B are shifted further to another non-recorded track and the camera is again stopped or suspended in this condition. 
   When the operation of the camera CA is stopped or suspended by the resetting of the flip-flop FF 1 , the Q output of the flip-flop FF 1  has been high. Therefore, at this point of time, the transistor Tr 1  is released from its state being kept conductive. If the trigger button  34  has been released from the state of being depressed and if the trigger switches SWR 1  and SWR 2  thus have been turned of at this point of time, the transistor Tr 1  becomes non-conductive to cut off power supply to the whole circuits system. The timing for releasing the trigger button  34  from depression is arranged as follows: As indicated by {circle around (A)} in  FIG. 11(   a ), if the switch SWR 2  has once been turned on by depression of the button  34  to the second step stroke, the transistor Tr 1  is caused to be retained in a state of being conductive by the action of the flip-flop FF 1  as mentioned in the foregoing. The camera, therefore, automatically performs the operation described in the foregoing and the heads  15 A and  15 B come to a stop upon completion of shifting to the second recording track. On the other hand, as indicated by {circle around (B)} also in  FIG. 11(   a ), if the trigger button  34  is depressed only to the first step stroke and then released without going to the second step stroke, the conductivity holding arrangement is not applied to the transistor Tr 1 . Therefore, the camera is instantaneously stopped when the trigger button is released from the depression made in this manner. 
   Further, while the Q output of the flip-flop FF 2  is low, i.e. during recording, the lamp La 2  is caused to light up with the transistor Tr 2  rendered conductive to indicate that recording is in process. It is advantageous to have this lamp La 2  positioned to permit observation of it within the view finder. 
   In this mode S-A, upon completion of recording for one frame, the heads  15 A and  15 B are either stopped or suspended in a state having been automatically shifted to the next recording track. After that, the operation described in the foregoing is repeated to record picture image signals for one frame on each of recording tracks one after another every time the trigger button  34  is depressed to the second step stroke. 
   Then, the number of recording tracks that have been recorded in this manner is indicated on the track number indicating graduation plate  75  by the pointer  73  which is attached to the fore end of the counting member  72  which is shown in  FIG. 9 . Upon completion of recording on the innermost track of the disc  11 , when the heads  15 A and  15 B are automatically shifted, the protrusion  76  provided on the form end of the counting member  72  comes to open the end switch SWE and power supply to the whole circuit system is cut off. 
   The foregoing description has covered a recording operation on a recording disc  11  which has not been recorded at all. In cases where the camera is loaded with a cartridge containing a disc that has some of its recording tracks already recorded, the camera operates in the following manner: Assuming that the first track of the disc  11  has already been recorded, the flip-flop circuits FF 1 , FF 3  and FF 4  are reset and the flip-flop circuit FF 2  is set by the pulse produced from the power up clear circuit PUC when the first step trigger switch SWR 1  is turned on. The output level of the integration circuit HIC becomes higher than a predetermined level when the motor starts. Therefore, as shown in  FIG. 12(   m ), the output of the Schmidt circuit SMC becomes high. Accordingly, as will be understood from  FIG. 7B , the Q outputs of the flip-flop circuit FF 1  and FF 3  remain low as shown in  FIGS. 12(   e ) and ( h ), because at least their reset inputs R remain high. Therefore, the flip-flop FF 2  is not reset and the Q output of the flip-flop FF 2  remains high as shown in  FIG. 12(   g ). Thus, there obtains a condition of inhibiting recording. Further, since the output of the inverter IV 1  becomes low when the output of the Schmidt circuit SMC is high, the flip-flop FF 4  is not set and its Q output remains low as shown in  FIG. 12(   i ). Therefore, even if the second step trigger switch SWR 2  is turned on by further depression of the trigger button  34  at this point of time, the transistor Tr 4  is not rendered conductive thereby. Therefore, the differentiation circuit DFC does not produce a negative pulse. On the other hand, when the output of the Schmidt circuit SMC becomes high, the B output of the counter CNT 2  is applied to the base of the transistor Tr 3  through the AND gate AG 3  as shown in  FIG. 12(   o ). Accordingly, when the transistor Tr 3  is rendered conductive, the plunger Pl is energized to shift the heads  15 A and  15 B to the next track. If the next track has not been recorded before, the output level of the integration circuit HIC becomes lower than the predetermined level. Accordingly, as shown in  FIG. 12(   m ), the output of the Schmidt circuit SMC becomes low after a predetermined period of time to make the output of the inverter IV 1  high. By this, the flip-flop FF 4  is set and the Q output of it becomes high as shown in  FIG. 12(   i ). Therefore, if at this point of time the second step trigger switch has been turned on, the transistor Tr 4  becomes conductive to cause the differentiation circuit DFC to produce a negative pulse as shown in  FIG. 12(   c ). Then, the high pulse from the inverter IV 2  ( FIG. 12(   d ) (comes to set the flip-flop FF 1  and the Q output of the flip-flop FF 1  becomes high as shown in  FIG. 12(   e ). The flip-flop FF 3  is set by this and the Q output thereof becomes high as shown in  FIG. 12(   h ). Accordingly, when the output of the delay circuit DLC becomes high ( FIG. 12(   j )), the flip-flop FF 2  is reset and its Q output becomes low as shown in  FIG. 12(   g ). Then, as mentioned in the foregoing, signals for one frame are recorded on the new recording track. If this new track has already been recorded, the output of the Schmidt circuit SMC remains high as shown by a broken line in  FIG. 12(   m ). Therefore, with the recording inhibiting condition being kept unchanged as shown by broken lines in  FIG. 12(   c )-( i ), ( l ) and ( o ), the heads  15 A and  15 B are further shifted to the next track. After that, when the output of the Schmidt circuit SMC becomes low as shown by a broken line in  FIG. 12(   m ), i.e. when these heads arrive at a non-recorded track, the above mentioned actions are performed, as shown by broken lines in  FIGS. 12(   c )-( i ) and ( l ), to have signals for one frame recorded on this non-recorded track. 
   In cases where a cartridge having some of tis tracks already recorded is used, therefore, double recording on the recorded tracks is inhibited and the heads  15 A and  15 B are arranged to be automatically shifted without performing recording on the recorded tracks until a non-recorded track is detected. Upon completion of recording on the non-recorded track, the heads are shifted to a next non-recorded track. After completion of shifting, the camera CA is either stopped or suspended. 
   The operation in the mode S-A has been described in the foregoing, operation in the next mode S-M, i.e. single picture image shot—manual head shifting mode, will be understood from the following description: When the slide  37  is shifted to the position M, the switch SWM 1  is shifted thereby from the side of the plunger Pl to the side of the lamp La 3  while the push switch SWP is connected to the plunger Pl through the switch SWM 2 . Therefore, even when a track which is facing the heads  15 A and  15 B are not automatically shifted to a next track. Instead of that, the lamp La 3  flickers in response to the output of the AND gate AG 3 , or the B output of the counter CNT 2 , to give a warning that the track facing these heads  15 A and  15 B has already been recorded. See  FIG. 12(   p ). In this case, the push button  38  is depressed to turn on the switch SWP for shifting the heads  15 A and  15 B to a next track. 
   In this mode S-M, if the track facing the heads  15 A and  15 B has not been recorded, recording can be performed by operating the trigger button in the same manner as described in the foregoing. Upon completion of recording on this track, however, the heads  15 A and  15 B are not shifted to a next track while the lamp La 3  just flickers even when the output of the Schmidt circuit SMC becomes high—see broken lines in  FIGS. 11(   g ) and ( s ) and  FIG. 11(   t ). The heads  15 A and  15 B are shifted, in this case, by turning on the push switch SWP. On the other hand, if the track facing the heads  15 A and  15 B has already been recorded, the lamp La 3  flickers as shown in  FIG. 12(   p ). The heads  15 A and  15 B, therefore, can be shifted to a next track by turning on the switch SWP. Then, if this track has not been recorded, recording can be performed thereon. If this track has been recorded, the lamp La 3  continues to flicker to give a further warning. In this manner, the warning by the lamp La 3  is repeated until the heads  15 A and  15 B arrive at a non-recorded track; and, with the push button  38  thus being repeatedly depressed, recording is performed on a non-recorded track when the heads  15 A and  15 B come to the non-recorded track. 
   The details of the functions of the above stated flip-flop FF 4  and the transistor Tr 4  are as follows: If the flip-flop FF 4  and the transistor Tr 4  are not provided in the circuit system shown in  FIG. 7 , in cases where the trigger button  34  is rapidly depressed to the second step stroke to almost concurrently turn on the trigger switches SWR 1  and SWR 2  when a recording track facing the heads  15 A and  15 B is detected already recorded in the above stated mode S-A and some subsequent tracks are also found recorded, or when, in the mode S-M, a track facing the heads  15 A and  15 B is detected already recorded, even if the turning on of the trigger switch SWR 2  causes the differentiation circuit DFC to produce the negative pulse and thus to have a high pulse produced from the inverter IV 2 , the output of the Schmidt circuit SMC might have not become high. Then, as will be understood from  FIG. 7B , the flip-flop FF 1  would not be set at least the Q output thereof would remain low. In such a case, even if the heads  15 A and  15 B are brought to a non-recorded track by automatic shifting in the mode S-A or by operating the push button  38  in the mode S-M, the output of the Schmidt circuit SMC is low at this point of time while the flip-flop FF 1  is still not set and its Q output also remains low. Therefore, the camera CA is either stopped or suspended in a state of having the heads  15 A and  15 B brought to the non-recorded track, so that recording cannot be performed on the non-recorded track. On the other hand, with the flip-flop FF 4  and the transistor Tr 4  provided, the flip-flop FF 4  is set only when the output of the inverter IV 1  is high, i.e. when the output of the Schmidt circuit SMC is low indicating that a track facing the heads  15 A and  15 B has not been recorded. Therefore, as will be understood from  FIGS. 12(   a ), ( c ), ( i ) and ( m ), the transistor Tr 4  does not become conductive as long as the output of the Schmidt circuit is high, that is as long as the heads  15 A and  15 B are facing a recorded track, even if the switch SWR 2  has been turned on. Therefore, the differentiation circuit DFC does not produce the negative pulse. Then, when the heads  15 A and  15 B come to face a non-recorded track and when the output of the Schmidt circuit thus become low, the flip-flop FF 4  is set to make the transistor Tr 4  conductive. Then, the differentiation circuit DFC comes to produce the negative pulse and the flip-flop FF 1  is set thereby. With this arrangement, therefore, the above stated trouble of inoperativeness can be effectively avoided. 
   Operation in the mode of continuous picture image shots will be understood from the following description: For continuous picture image shots, the selection dial  36  is shifted to the mode C 1  or C 2 . This causes each of the switches SW 1 -SW 3  to shift to the terminal C 1  or C 2 . Further, in this case, even if the slide  37  is in the mode position M, the cam  39  which is responsive to the mode selection dial  36  shifts the slide  37  to the mode position A. Accordingly, each of the switches SWM 1  and SWM 2  comes to be connected to the terminal A. Then, with the switch SW 2  connected to the terminal C 1  or C 2 , the differentiation circuit DFC is caused to short-circuit between its terminals a and b. Once the flip-flop FF 4  is set, therefore, the output of the differentiation circuit DFC remains low as long as the second step trigger switch SWR 2  is on. The set input S of the flip-flop FF 1 , therefore, is high as long as the switch SWR 2  is on and, as will be understood from  FIG. 7B , the Q output of the flip-flop FF 1  is high as long as its reset input R is low. Further, the  Q  output of the flip-flop FF 1  is low as long as its set input S is high. Therefore, while the trigger button  34  is being depressed to the second step stroke, picture image recording is not inhibited and recording shots are performed continuously as long as the heads  15 A and  15 B are facing a non-recorded track. Further, if a recorded track is detected during the recording operation, the output of the Schmidt circuit SMC becomes high upon detection of it. The flip-flop FF 2  is set by this and the counter CNT 1  is cleared (i.e. recording is inhibited). At the same time, the plunger is energized to carry out automatic shifting of the heads  15 A and  15 B to a next track. In this instance, when the output of the Schmidt circuit SMC becomes high, both the set input S and the reset input R of the flip-flop FF 1  become high. Therefore, as will be understood from  FIG. 7B , the Q output of the flip-flop FF 1  becomes low while, on the other hand, the flip-flop FF 3  is reset. This condition remains unchanged as long as the heads  15 A and  15 B are facing a recorded track. When the heads  15 A and  15 B arrive at a non-recorded track, the output of the Schmidt circuit SMC becomes low to make the Q output of the flip-flop FF 1  high. Accordingly, the flip-flop FF 3  is set and the Q output thereof becomes high. This in turn resets the flip-flop FF 2  to remove the recording inhibition and to permit resumption of recording. This action is continuously performed as long as the trigger button  34  is in a state of being depressed to the second step stroke. Further, the holding of continuity of the transistor Tr 1  is effected in the same manner as described in the foregoing. The switch SW 3  selects the output of the AND gate AG 5  in the mode C 1  and selects that of the AND gate AG 6  in the case of the mode C 2 . A continuous shot operation is performed at a rate of about 6 picture images/sec. in the case of the mode C 1  and about 3.3 picture images/sec. in the mode C 2 . 
     FIG. 13  shows the operation of the circuit system in the mode C 1  or C 2 . In this drawing, the mode C 1  is shown by full lines and the mode C 2  by broken lines. 
   The camera CA is provided with an external output jack  42 . With an ordinary VTR device connected to this jack and by setting the mode selection dial  36  set in the mode position MV, a motion picture shot operation in the 2 fields—1 frame manner can be carried out at a rate of 30 frames/sec. With the dial  36  set in the mode position MV, each of the switches SW 1 -SW 3  is shifted to a terminal MV thereof. When the trigger button  34  is depressed at least to the first step stroke to just turn on the switch SWR 1 , the circuit  69  and the light measuring circuit PMC are actuated. A combined color video signal of NTSC system is then produced out of the jack  42  to be recorded on a magnetic tape in the VTR device. 
   Further, the actions of the camera CA described in the foregoing can be started by operating a remote controller connected to the remote control jack  43  instead of by operating the trigger button. In this case, since the circuit shown in  FIG. 7  is provided with a safety circuit consisting of the flip-flop FF 4  and the transistor Tr 4  as mentioned in the foregoing, the remote controller is required to have just a single switch. 
   Referring now to  FIG. 14 , one example of modification of the above mentioned embodiment of the invention is described as shown below: 
   In this modification example, a single magnetic head is used for the combined purposes of detecting non-recorded or recorded track and performing a recording operation. The operation mode of the device is shiftable as desired by utilizing the output of the above stated counter CNT 1  in the same manner as the control system shown in  FIG. 7 .  FIG. 14  shows only the parts that are different from the arrangement shown in  FIG. 7 . Other parts that are omitted from the illustration are arranged in exactly the same manner as in  FIG. 7 . Description given here is, therefore, limited to the parts differing from the arrangement shown in  FIG. 7 . 
   In  FIG. 14 , a reference numeral  15 ′ indicates a magnetic head which is employed for the combined pusposes of detecting and recording. The head  15 ′ is connected to the above stated analog switch ASW and to an analog switch ASW′ is connected to the DC cut capacitor C provided in the input stage of the above stated non-recorded or recorded track detection circuit (i.e. the amplifier AP, the integration circuit HIC and the Schmidt circuit SMC). The analog switch ASW′ is arranged to receive from the inverter IV 4  an inverted output of the signal to be supplied to the above stated analog switch ASW. In this arrangement, when the recording control signal (i.e. the B output of the counter CNT 1  or the output of the AND gate AG 5  or AG 6 ) which is selected by the switch SW 3  is low, the analog switch ASW′ is turned on to use the head  15 ′ for the purpose of detecting a non-recorded or recorded track. Then, if a non-recorded track is detected by this and the recording control signal from the switch SW 3  becomes high to permit recording, the analog switch ASW is turned on to use the head  15 ′ for the purpose of recording on the non-recorded track. Other details of operation are exactly the same as in the case of the circuit shown in  FIG. 7  and are omitted from description here. 
   In the embodiments described in the foregoing, the head is arranged to be mechanically shifted relative to the tracks of the disc  11 . In addition to these embodiments, other embodiments are shown in  FIG. 15  and  FIG. 16 . In each of the embodiment, the magnetic head is arranged to be a multi-channel head having a number of channels corresponding to the number of tracks of the disc  11  and is fixedly disposed to perform the function of discerning a recorded or non-recorded track and the function of recording on a non-recorded track by shifting it from one channel to another.  FIGS. 15 and 16  show only the essential parts required for carrying out the above stated functions and, unless specifically stated otherwise, other parts that are not shown in these drawings are exactly the same as the arrangement shown in  FIG. 7 . 
   Referring first to  FIG. 15  which corresponds to  FIG. 7 , a reference symbol CNT 3  indicates a binary counter of a pulse fall synchronization type incorporating a decoder, or a counter-decoder, which is provided for channel shifting. The clear terminal CLR of the counter CNT 3  is arranged to receive the output of the power up clear circuit PUC. A symbol IV 5  indicates an inverter arranged for obtaining an inverted signal of the output of the power up clear circuit PUC; OC indicates a one shot circuit which is arranged to be triggered by building up of the output of the inverter IV 5 ; and OG 4  indicates an OR gate which is provided for obtaining a logical sum of the output of the one shot circuit OC and the output of an inverter IV 7  the input terminal of which is connected to a resistor R provided in place of the above stated plunger Pl. The output of the OR gate OG 4  is arranged to be supplied to the clock input terminal CK of the counter CNT 3  as count up clock. Reference numerals  15 A 1 - 15 A n  indicate non-recorded- or recorded-track detecting heads which are fixedly arranged to correspond to the tracks provided on the disc  11 ; and  15 B 1 - 15 B n  indicate recording heads which are also fixedly arranged to correspond to these tracks. These heads constitute a so-called multi-channel head. In the same manner as in the case of the head  15  shown in  FIG. 8 , the detection heads  15 A 1 - 15 A n  are positioned ahead of the recording heads  15 B 1 - 15 B n  in relation to the rotation of the disc  11 . In this particular embodiment, the number of heads “n” means  40  and these heads are unified into one body. Symbols ASW′ 1 -ASW′n indicate analog switches respectively connected to the heads  15 A 1 - 15 A n  and are connected to the input stage of the above stated non-recorded- or recorded-track detection circuit, i.e. to a DC cut capacitor on the input side of the amplifier AP. Symbols ASW 1 -ASWn indicate analog switches connected to the heads  15 B 1 - 15 B n  and also to the output stage of the image pickup—video signal generating—magnetic recording circuit  69 . Symbols AND 1 -ANDn indicate AND gates which are arranged to obtain logical products of the recording control signal selected by the above stated switch SW 3 , i.e. the B output of the counter CNT 1  or the output of AND gate AG 5  or AG 6  and the decoded outputs  1 -n of the above stated counter CNT 3 . The outputs of these AND gates AND 1 -ANDn are supplied to the analog gates ASW 1 -ASWn. Further, the decoded outputs  1 -n of the counter CNT 3  are supplied to the analog switches ASW′ 1 -ASW′n respectively. 
   The arrangement described above operates as follows: With the trigger button  34  depressed to the first step stroke, the power up clear circuit PUC produces pulses as shown in  FIG. 11(   g ). Then, this causes all of the decoded outputs  1 -n of the counter CNT 3  to become low. Following this, when the one shot circuit OC is triggered by building up of the output of the inverter IV 5  and when the one shot pulse of the one shot circuit OC is produced, this causes the counter CNT 3  counts up by one and first the decoded output  1  thereof becomes high. The analog switch ASW′ 1  is turned on and the output of the detection head  15 A 1  is applied to the amplifier AP through the capacitor C. Then, if the first track facing the heads  15 A 1  and  15 B 1  has not been recorded, the flip-flop FF 1  is reset with flip-flop FF 3  set as mentioned in the foregoing, and the recording head  15 B 1  performing recording on the first track. After recording, when the completion of the recording on this track is detected by the detection head  15 A 1 , a high pulse output of the AND gate AG 3  renders the transistor Tr 3  momentarily conductive. Therefore, in cases where the switches SWM 1  and SWM 2  have been shifted to the mode A (i.e. in the case of the mode S-A, C 1  or C 2 ), this causes the inverter IV 7  to produce a high pulse output. Then, building-up of this output pulse of the inverter IV 7  causes the counter CNT 3  to count up by one to make the decoded output  2  thereof high. Then, the analog switch ASW′ 2  is turned on this time. The detection head  15 A 2  detects whether the second track is not recorded. In the mode C 1  or C 2 , if the second track is not recorded, the recording head  15 B 2  performs recording on the second track when the recording control signal from the switch SW 3  becomes high in the same manner as described in the foregoing. Conversely, if the second track is found already recorded, a high pulse output of the AND gate AG 3  renders the transistor Tr 3  momentarily conductive. Then, building-up of the inverter IV 7  causes the counter CNT 3  to count up by one and the decoded output  3  of the counter becomes high. Accordingly, the above mentioned detection is performed on a third track. Thus, in the case of the mode C 1  or C 2 , recording on non-recorded tracks is repeated as long as the trigger button  34  is kept in a state of being depressed in the same manner as in the preceding embodiment. 
   In the mode S-A, after completion of recording on a non-recorded track, the pulse-fall of the output pulse of the inverter IV 7  causes the counter CNP 3  to count up by one; under this condition, the camera is either stopped or suspended; after the trigger button  34  is released from depression, when it is depressed again, detection is performed by shifting from one to another the detection heads  15 A 1 - 15 A n  starting with the head  15 A 1  until a non-recorded track is detected thereby; and, upon detection of a non-recorded track, recording is performed thereon by a recording head that corresponds to this track. Further, in the mode S-M, the channel shifting of the heads  15 A 1 - 15 A n  and  15 B 1 - 15 B n  is carried out by operating the push switch SWP in the same manner as in the embodiment shown in  FIG. 7 . In other words, the input to the inverter IV 7  becomes low with the switch SWP turned on. Therefore, by the building-up of the output of the inverter IV 7 , the counter CNT 3  is caused to count up by one to permit the channel shifting of the heads. 
   In the modification example which is shown in  FIG. 16  and which corresponds to the embodiment shown in  FIG. 12 , a multi-channel head is composed of heads  15 ′ 1 - 15 ′ n  each of which is arranged to serve combined purposes of detecting and recording, unlike the heads  15 A 1 - 15 A n  and  15 B 1 - 15 B n  which are used in the arrangement shown in  FIG. 15 . Each of these heads  15 ′ 1 - 15 ′ n  is connected to analog switches ASW′ 1  and ASW 1 , ASW′ 2  and ASW 2  . . . , or ASW′ n  and ASW n.  There are arranged AND gates AND′ 1 -AND′n to obtain logical products of the recording control signal which is selected by the switch SW 3  (i.e. the B output of the counter CNT 1  or the output of AG 5  or AG 6 ) and is obtained as inverted signal through an inverter IV 6  and the decoded outputs  1 -n of the counter CNT 3 . The outputs of these AND gates AND′ 1 -AND′n are arranged to be supplied to the analog switches ASW′ 1 -ASW′n as applicable respectively. 
   The device arranged as shown in  FIG. 16  operates in a manner which will be readily understood from the foregoing description of the arrangement shown in  FIGS. 14 and 15 . Therefore, the operation of the device is omitted here. 
   According to the arrangements shown in  FIGS. 15 and 16 , the mechanical arrangement for shifting the head as shown in  FIG. 2  is no longer required. With these arrangements employed, it will be disadvantageous to have the “A”-to-“M” change-over arrangement including the slide  37 , push button  38  and the switches SWM 1 , SW 2  and SWP. In these modification examples, the above stated lamp La 3  may be connected to the collector of the transistor Tr 3  to display the count up action of the counter CNT 3 , i.e. the channel shifting status of the heads  15 A 1 - 15 A n  and  15 B 1 - 15 B n.  As for displaying the number of recorded tracks in the modification examples shown in  FIGS. 15 and 16 , the display may be arranged, for example, in the following manner: The device is provided with a display unit DU consisting of a decoder drive and a display seven segment LED. The outputs  1 —n of the counter CNT 3  are supplied to the decoder disposed within the display unit DU to make digital display. It is also possible to use a LED dot array display unit consisting of n number of light emitting diodes (LED). In such a case, it will be convenient to have the display made within the view finder. 
   In the modification example shown in  FIG. 15  or  16 , the end switch SWE and control for the switch SWE are arranged, for example, as follows: A so-called latching relay switch LRS is employed as shown in the drawing as end switch SWE. The latching relay switch is arranged to have its movable contact piece shifted from a terminal b to a terminal a when its coil CLa is energized. The connection to the terminal a is retained, for example by a holding force of a permanent magnet even when power supply to the coil CLa is cut off. Then, when the power is supplied again to the coil, the movable contact piece MC shifts from the terminal a to the terminal b and again is kept in contact with the terminal b by the holding force of the permanent magnet. One end of the coil CLa is connected to the collector of a NPN switching transistor Tr 5  which is arranged to receive the decoded output n+ 1  of the above stated counter CNT 3  and the one end of the coil CLb is connected to one off the contact pieces of a normally open type switch SW 4  which is arranged to be turned on, for example, by opening the lid  16  of the cartridge loading chamber. The movable contact piece MC and the other end of each of the coils CLa and CLb are connected to the plus side of the power source E while the terminal b is connected to the emitter of the transistor Tr 1 . The emitter of the transistor Tr 5  and the other contact piece of the switch SW 4  are connected to the minus side of the power source E. With arrangement made in this manner, when the loading chamber lid  16  is opened for loading the camera CA with a cartridge  12 , the switch SW 4  is turned on to energize the coil CLb. The movable contact piece MC then connects with the terminal b. Then, with the first step trigger switch SWR 1  turned on by depression of the trigger button, the transistor Tr 1  is made conductive to allow power supply to the circuit system. After completion of recording on all tracks of the disc  11 , when the decoded output n+ 1  of the counter CNT 3  becomes high, the transistor Tr 5  is made conductive thereby and the coil CLa is energized to shift the movable contact piece MC from the terminal b to the terminal a. Therefore, power supply to the circuit system is cut off at this point of this even if the first step trigger switch SWR 1  is on. When the loading chamber lid  16  is opened to take out the recorded cartridge, the switch SW 4  is turned on to energize the coil CLb. Again the movable contact piece MC is shifted from the terminal a to the terminal b and is kept there until the coil CLa is energized through the transistor Tr 5 . 
   As described in the foregoing, in accordance with this invention, a relatively simple logical arrangement not only permits single picture image recording but also permits continuous recording on a plurality of tracks. It must be emphasized that the invention makes it possible to carry out analytical photographic recording for moving objects, so that unique, interesting picture images can be enjoyed by reproducing such records. The functional improvement attained in accordance with this invention makes the recording device usable for a wide range of purposes. 
   Further, as also shown in the embodiment examples given herein, the continuous recording can be performed at different selectable speeds. This arrangement gives a further advantageous effect. Further, with the invented device used in combination with an ordinary VTR device, it is possible to accomplish recording of a moving object at a VTR speed without being confined to recording on a recording medium having a limited number of recording tracks. 
   In accordance with the arrangement made in the embodiment examples, a state of having been already recorded or not recorded of the track on which recording is going to be performed can be accurately detected. This is a highly advantageous feature for a device of this type which must meet the rational requirements mentioned in the beginning of this specification. With a very simple logical arrangement, the device of the invention is capable of performing advantageous functions, such as inhibiting double recording, giving a warning against it, automatic shifting of recording means to a non-recorded track and the like. 
   The arrangement to display the number of recorded tracks as shown in the embodiment examples is very simple. The display arrangement, therefore, can be easily incorporated in the device, is less likely to come out of order and can be added at low cost, so that it gives a great advantage to the picture image recording device. Further, as also shown in the embodiment examples, the power source of the recording device is arranged to be automatically cut off upon completion of recording on all recording tracks. This is highly rational arrangement for a device of this type. 
   In the embodiment examples given, the image pickup—video signal generation—magnetic recording system circuitry to be used in accordance with this invention is arranged to use a CCD image sensor as image pickup element. However, it goes without saying that, in place of the CCD image sensor, conventionally known image pickup tubes, such as a vidicon, etc. are also usable as image pickup element. Further, a magnetic disc is used as recording medium in the embodiment examples. However, the invention is not limited to this. Use of other recording media, such as a magnetic drum is also usable with minor modification of the structural arrangement of the device.

Technology Classification (CPC): 8