JPS62177754A - Recording device - Google Patents

Abstract

PURPOSE:To displace the relative position between a recording carrier and a recording head and to stabilize a power source voltage by providing the 1st start mode accelerating the rise of a drive means and the 2nd start mode saving energy and appropriately using them under the circumstances. CONSTITUTION:The recording head 5 records a signal on the magnetic disk 2 of a recording device, and a motor 88 rotates the disk 2. A step motor 49 displaces the relative position of the disk 2 and the head 5, and is controlled by a step motor control circuit 87. A system controller 91 controls the circuit 87 and a motor control circuit 89. a power transistor TR 89-1 controlling a voltage impressed on the motor 88 is installed between the control circuit 89 and the controller 91. Power applied to the motor 88 is limited to the 1st value in the 1st mode of an A/D converter 89' applied to the base, and further limited to the lower 2nd value in the 2nd mode, whereby a power source circuit 93 is stabilized and its service life is prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Application in Industry> The present invention relates to a recording apparatus for recording on a record carrier using a recording head.

(Prior Art) As a recording device that records signals on a recording carrier, for example, an electronic still camera that records video signals on a disc-shaped magnetic sheet is known. In this method, it is possible to form concentric tracks on the magnetic sheet 1- by rotating a magnetic sheet, which is a recording carrier, at a constant high speed and performing recording with the recording head while changing the relative position between the recording head and the recording carrier. Although it is possible, it is required that the time L1 lag from when the shutter release button for starting recording is pressed until the actual recording is made as small as possible.

Therefore, the rotational shift of the magnetic sheet is reduced as much as possible.
In order to reduce the time lag mentioned above,
It is conceivable to construct the magnetic sheet so that maximum electric power can be applied to the driving means for the magnetic sheet when the rotation of the magnetic sheet is required. Such a configuration is applicable not only to electronic cameras, but also to recording devices that aim to shorten the time lag at startup as much as possible.

<Problems to be Solved by the Invention> However, in conventional recording devices, it is required to always shorten the time lag as much as possible when starting the drive means for changing the relative position between the record carrier and the recording head. It's not like that. For example, in the case of an electric f-still camera, the rotation of the magnetic sheet is started to detect the presence or absence of recording on each track of the magnetic sheet. Even in such a case, it is better to keep the above-mentioned time lag short, but the shutter release It does not need to be as short as when recording is actually performed after the button is pressed.

Nevertheless, if you always start up to shorten the time lag as much as possible as described above, depending on the capacity of the power supply, the capacity of the battery will increase due to repeated startups. There was a problem that □ decreased and the power supply voltage became too low F, causing other devices to malfunction.

This problem occurs not only in electronic still cameras, but also in recording apparatuses that perform recording by changing the relative position between the record carrier and the recording head.

The present invention aims to solve such problems in an FI-like manner.

<L stage for solving problems> In order to solve the conventional problems mentioned in L, the present invention provides a record carrier for recording a signal, a recording head for recording a signal on the record carrier, and a recording head for recording a signal on the record carrier. a first drive stage for displacing the relative position of the carrier and the recording head; and a first drive stage for limiting the power supplied to the drive means to a first value when the drive means is activated.
and a second startup mode that limits the startup mode to a second value lower than the first value.
- It is characterized by having:

<Sakukawa> 1- In the configuration described above, the recording apparatus of the present invention has a first startup mode in which the power supplied to the drive means for displacing the relative position between the recording head and the Q carrier is limited to a first value; The first
and a second activation mode that limits the activation mode to a second value lower than the value of .

7/'/'/'<Embodiment> Next, an electric circuit system of an embodiment of the recording apparatus will be described with reference to FIG. 1-1. In addition, the same figure shows the present invention in a still state.
This shows an example of a circuit system when applied to a video recording device.

In the figure, 2 is a magnetic disk, 3 is a center core of the magnetic disk, 5 is a head for recording video signals on the magnetic disk 2, 49 is a step motor for moving the head 5 in the radial direction of the disk 2, and 58 A carrier position detector 59 detects that the head 5 is located on the first track on the disk 2, that is, on the outermost circumference, and 59 detects that the head 5 is located on the 51st track on the disk 2, that is, on the innermost circumference. carrier position detector.

69 is a jacket presence/absence detection switch that detects whether the jacket containing the magnetic disk 2 is loaded in the recording device, and 70 is a loading/unloading detection switch that detects that the jacket has been removed from the loaded state. When it is turned on, it changes from off to on. 74 is an outer cover lock completion detection switch 81 for detecting that the outer cover for loading the jacket is closed and locked;
is a camera section having a known configuration for forming a video signal;
82 is a recording circuit for recording the video signal output from the camera section 81 onto the disk 2 through the head 5;
3 is a recording control circuit for controlling the recording circuit 82 to record video signals for l fields or l frames; and 84 is a periodic signal generator for generating horizontal and vertical periodic signals H3 and vS. The output is provided to a camera section 81, a recording circuit 82, a recording control circuit 83, and a disk motor control circuit 89, which will be described later. Note that the recording control circuit 83 outputs a recording end signal RE upon completion of recording by the head 5.

Reference numeral 85 indicates a recording presence/absence detection circuit constituting a search means for detecting the presence/absence of recording at each recording position on the disk 2, that is, the presence or absence of a video signal through the head 5;
This is a changeover switch for switching between the output of the recording circuit 82 (terminal R side) and the input of the detection circuit 85 (terminal C side).

87 is a step motor drive circuit for driving the step motor 49 for moving the head, 88 is a disk rotation motor for rotating the disk 2 through the spindle 6, and 89 is a disk motor control circuit controlled by the motor 88. Here, the reference speed signal from the internal reference oscillator, the rotational speed signal FC from the motor 88, the vertical periodic signal S from the periodic signal generation circuit 84, and the center core 3 of the disk 2. Based on the disk rotation transfer signal PG from the disk rotation phase detector 90 that detects the buried magnetic pin, the disk 2 moves at a predetermined speed corresponding to the field or frame frequency of the television (0 in the NTSC system). .600 to 1,
The motor 88 is controlled so as to be rotated at a rotation speed of 80 Or p m ) and at a predetermined phase with respect to the timing of the vertical periodic signal vS. The control circuit 89 is connected to the motor 88.
When the motor starts rotating at a specified speed and a specified phase, a servo lock-in signal SL is output.

The motor control circuit 89 has a function of changing the voltage applied to the motor 88 according to the analog output output from the D/A converter 89'.
When the analog output output from is at a relatively high first level, most of the power supply capacity of the power supply circuit 93 is applied to the motor 88, and the motor 88 operates to shorten the start-up time of the motor 88 as much as possible. , when the analog output output from the D/A converter 89' is at a second level lower than the first level, less power is applied to the motor 88 than when it is at the first level. In other words, the power supply battery 9 of the power supply circuit 93 is applied so as to protect the power supply circuit 93.
Control is performed to further extend the life of 3'.

Here, part of the configuration of the motor control circuit 89 will be explained in the first section.
This will be briefly explained using Figure 2.

In FIG. 1-2, 89-1 is an NPN type power transistor for controlling the voltage applied to the motor 88, and the base of the transistor 89-1 is connected to the D/A converter 8.
9' output. The digital data from the system controller 91 is transferred to the D/A converter 89'.
When the analog voltage is high, the collector-emitter voltage of the power transistor 89-1 decreases, and the voltage applied to the motor 88 becomes high (
When the analog voltage is low, the collector-emitter voltage of the power transistor increases and the motor 8
The voltage applied to 8 becomes lower. Note that instead of using an NPN type power transistor, a PNP type power transistor may be used. Furthermore, when the power supply voltage is divided by a resistor instead of using the power transistor as a pass transistor, the voltage division ratio of the resistor may be changed.

As described above, the motor 8 is controlled by controlling the data sent from the system controller 91 to the D/A converter 89'.
By controlling the voltage value applied to the motor 8 and changing the power applied to the motor 88, the start-up time of the motor 88 can be shortened, and the life of the power supply battery 93' of the power supply circuit 93 can be extended.

89' is the D/A converter, which converts digital values into analog values as described above.

Also, the system controller 91. D/A converter 89',
The motor control circuit 89 performs servo control of the motor speed, and when the motor speed decreases below a predetermined value, the digital value output from the system controller 91 is increased (by doing so, a higher voltage is applied to the motor 88). is applied.

Reference numerals 91 include a recording power switch 95, which will be described later, a mode changeover switch 97, a cassette presence/absence detection switch 69, a cassette loading/unloading detection switch 70, an outer cover/lock completion detection switch 74, carrier position detectors 58 and 59, and a recording control circuit 83. Record end signal RE motor control circuit 89 from
This controller is a system that controls the entire circuit system shown in FIG. 1-1 based on the servo lock signal SL from the servo lock signal SL and the power-on signal PO obtained when the power is turned on.

92 is a display device that emits light or includes a light emitting element; 93 is a power supply circuit that includes a battery; 93' is a backup (auxiliary) power supply circuit that includes a capacitor; 94 is a power switch; 95 is a recording trigger switch; 96 is a trigger button. , here, the power switch 94 is turned on by pressing down to the first step.
However, the recording trigger is triggered by pressing down to the second stage.
The switches 95 are configured to be turned on, respectively. Further, when the power is turned on by pressing the trigger button 96 to the first stage, the motor 88 is activated and a recording preparation operation is started. 97 can be used in single shooting mode (a mode in which one field or one frame is recorded per operation of the trigger switch 95) and continuous shooting mode (recording is performed at a predetermined speed as long as the trigger switch 95 is turned on). This is a mode changeover switch for switching between repeat mode (repeat mode), and when it is off, it is set to single shooting mode, and when it is on, it is set to continuous shooting mode.

It goes without saying that only the trigger switch 95 may be operated by the trigger button 96, and the power switch 94 may be operated by another member.

Further, the recording presence/absence detection circuit 85 is configured to detect the presence or absence of an RF (radio frequency) signal when the recording signal is an FM signal, for example, and outputs a high signal when there is recording.

Also, the backup power supply circuit 93' is connected to the power switch 9
When 4 is turned on, power is supplied from the power supply circuit 93 to charge and charge power to the capacitor provided in the circuit,
In response to turning off the switch 94, this charged power is supplied to a required circuit (for example, a small number of circuits (both the controller 91 and a latch circuit 100, which will be described later), and has a capacity of several tens of minutes to several hours.

99 is a counter that counts the drive pulses from the step motor drive circuit 87, and the step motor 49 is rotated in the normal rotation direction (carrier (
46) is counted up by driving in the X direction of the carrier 46), and counted down by driving in the reverse direction (the direction opposite to the X direction of the carrier 46), and is cleared by turning off the carrier position detector 58. When the circuit 59 is turned off, the preset data and the output of the generation circuit 98 (“51”
) is preset.

Reference numeral 100 denotes a latch circuit that latches the contents of the counter 99 in response to a load command from the controller 91, and constitutes a means for electrically storing the search results of recording/non-recording, and is also supplied with power from the backup power supply circuit 93'. It has become. 101 is the content A of the latch 100 and the counter 9
A comparison circuit that compares the content B of 9 with its A=B output (
A=B high) is given to the controller 91.

193 is a battery that is the power source of the power supply circuit 93; 194 is a power supply voltage detection circuit that detects the voltage of the battery 193;
The power supply voltage when power is being supplied to the motor 88 by the battery 193 and the power supply circuit 93 is detected, and when it is higher than a predetermined value, an H level signal is sent to the system controller 91, and when it is lower than a predetermined value, an L level signal is sent to the system controller 91.

When the system controller 91 starts the motor 88 and the output from the power supply voltage detection circuit 194 is at L level, the system controller 91 sends a digital value to the D/A converter 89', for example, "0100". By making the voltage smaller and outputting the aforementioned second level analog value to the motor control circuit 89, the battery l93 operates to extend its life.

In addition, when starting the motor 88 for automatic positioning of the head 5 to a non-recorded position on the disk 2, which will be described later, the system controller 91 controls the D/R so as to extend the life of the battery 193. By reducing the value of the digital value sent to the A converter 89' and outputting the aforementioned second level analog value to the motor control circuit 89, the life of the battery 193 is extended.

Note that when starting the motor 88 when the head 5 has been automatically positioned in advance at an unrecorded position on the disk 2 by an automatic positioning operation of the head 5 to an unrecorded position on the disk 2, which will be described later, the system The controller 91 temporarily increases the digital value sent to the D/A converter 89' to, for example, "1111" and outputs the above-mentioned first level analog value to the motor control circuit 89, so that the motor 88 starts up. However, immediately after such startup, before the speed of the motor 88 has sufficiently risen, the power supply voltage detection circuit 19
It is determined whether the output of 4 is at H level or L level, and when it is at L level, it is determined that the battery 193 is weak and its capacity is small, and the output is sent to the D/A converter 89'. By setting the transmitted dental value to a small value such as 0100''' as described above, the analog value of the second level described above is output to the motor control circuit 89 and the battery 19 is
3. Aim to extend the life of the product.

The system controller 91 includes a microcomputer etc. as a main component and is also supplied with power from a backup power supply circuit 93'.
Its operation will be explained below with reference to an operation flowchart.

In the above configuration, first, the preparation operation for recording when the power switch 94 is turned on by pressing the trigger button 96 to the first stage will be explained with reference to FIG. .

When the power is turned on (step 5QL), the system controller 91 activates the outer cover lock completion detection switch 7.
Check whether 4 is turned on or not.Step 5
O2) If it is not turned on, wait until it is turned on.

On the other hand, if it is on, the controller 91 then checks whether or not the jacket attachment/removal detection switch 70 is turned on (step 503). This means that disk 2 of head 5, which will be explained below,
Perform automatic positioning operation to the unrecorded position above.

That is, first, in order to prevent the recording surface of the disk 2 from being damaged due to the movement of the head 5 while the disk 2 is stopped, the controller 91 instructs the disk motor control circuit 89 to operate the motor 88. The command causes the motor 88 to rotate (step 504).

Note that before executing step SO4, step 8
04', the D/A converter 89' receives "0100".
”, the motor control circuit 89 is given a second level analog output lower than the first level described above, and the motor 88 is started in consideration of the longer life of the battery 193 than the start-up speed of the motor 88. I do.

That is, when automatically positioning the head 5 to the initial position using the flow described below, it is not necessarily necessary to increase the startup speed of the motor 88, so step SO4' is provided to control the voltage applied to the motor 89. The load on the battery 193 is reduced by lowering the resistance.

Subsequently, the step motor drive circuit 87 is instructed to continuously rotate the step motor 49 in the normal direction, thereby causing the motor 49 to continuously rotate in the normal direction (step 505). This allows the head 5 to be continuously moved toward the center of the disk 2, that is, in the direction of the arrow X in FIG. During this time, the controller 91 controls whether the head 5 is
It is necessary to repeatedly check whether the carrier position detector 59 in FIG. 6 is turned off by reaching the track position (step 506).
9 is commanded to stop (step 5O7).

Here, when the carrier position detector 59 is turned off, the counter 99 outputs the preset data from the generation circuit 98.
51" is preset, and its contents become "51".

Next, the controller 91 switches the changeover switch 86 to terminal C.
(Step 5Q8), and in this state, check the output of the recording presence/absence detection circuit (Step 509). If the output is not high, the latch circuit 100 latches the output of the counter 99 (Step 5IO). ), then a one-step reverse rotation of the step motor 119 is commanded (step 511). Hereinafter, this operation is performed until the output of the detection circuit 85 becomes high or the head 5 reaches the 0th track position and the carrier detector 58 is turned off (step 512).
) is repeated until

The recording presence/absence detector 85 detects the presence or absence of a recording signal on the disk 2 based on the signal picked up by the head 5, and outputs a high signal if the signal is present, and a low signal if the signal is absent. Output a signal. Also, at this time, the counter 99 counts down by one every time the step motor 49 reverses one step.

Now, in the above operation, in step SO9, the detection circuit 85
If the output of system controller 9 goes high,
1 commands continuous reversal of the motor 49 (step 513
), and during this period, check whether the carrier position detector 58 is off or not (step 514), and when it becomes off, command the motor 49 to stop (step 515).
. As a result, the head 5 is set to the 0th track position,
At this time, counter 99 is cleared and its contents are “0”.
become. On the other hand, at this time, the data of the number of the track (unrecorded) next to the last recorded track is left in the latch circuit 100 when viewed from the outer circumferential side of the disk 2, that is, from the 0th track side. .

After stopping the motor 49 in steps S] and 5, the controller 91 moves to the next step 816 and instructs the motor 49 to reverse by several track pitches (hereinafter referred to as TP). If the detector 58 is turned off in step S12, steps S13 to S15
The process proceeds to step S16 without passing through. In this case, the content to the latch circuit 100 is "B". Of course, in this case as well, the counter 99 is cleared and its content is "0". Also, the 50th track has been recorded. If so, step S09→S10→51
14S12→'SO9 Once completed, step S13
The contents of the latch 100 at this time are “5”.
1”.

Now, in step S16, the controller 91 moves the head 5 further by several TP in the direction opposite to the arrow X (
A step reversal of the motor 49 is commanded to the drive circuit 87.

As a result, the jacket attachment/detachment detection switch 70 is turned off by a mechanism not shown. Therefore, when the jacket is replaced (installed or removed) from now on, the detection switch is turned on and the conversion of the jacket can be detected as an input.

Now, the controller 91 controls the step motor 49 by a number T.
After the motor 49 is rotated in the opposite direction by P minutes, the motor 49 is commanded to continuously rotate forward in order to move the head 5 in the direction of the arrow X (step 517), and during this time, the A
=B output is checked (step 818). here,
As the step motor 49 rotates in the normal direction, the counter 99 counts up one by one from its content "0", and its content always corresponds to the position of the head 5 on the disk 2, that is,
A recording track signal is shown, and a comparison circuit 101 is shown.
makes the A=B output high when the opposing track number of the head 5 matches the contents of the latch circuit 100. Therefore,
When the A=B output of the comparison circuit 101 becomes high in step 318, the controller 91 responds to the output of the motor 49.
(step 519), thereby causing the head 5 to move to the track position held by the latch circuit 100.
In other words, the recording medium is positioned at the next track (unrecorded) after the last recorded track as viewed from the 0th track.

Next, the controller 91 commands the disk motor 88 to stop (Step 520), and then checks whether the carrier position detector 59 is off (Step 521). If not, the display 92 indicates that no recording is possible. That it will be possible (or that preparations for recording have been completed)
, is displayed (step 522), and if it is off, the display 92 is displayed to indicate that recording of the 50th track of disc 2 has ended (step 522).
(Step 23)
), recording is prohibited (step 524).

On the other hand, in the previous step SO3, if the jacket loading/unloading detection switch 70 is not on but is off, the jacket 1 has not been replaced (loading/unloading), or the cassette 1 has not been loaded. Therefore, the controller 91 further checks whether the jacket presence/absence detection switch 69 is on or not (step 525). If it is on, that is, if a jacket containing the magnetic disk 2 is loaded, the The process moves to step S21. On the other hand, if the detection switch 69 is not turned on, this means that the jacket containing the magnetic disk 2 is not loaded (no cassette). This is displayed (step 826), and recording is prohibited (step 522).

In this embodiment, the preparation operation for recording is performed as described above.

Next, after the preparatory operation for recording has been completed as described above, the recording operation is performed by turning on the snet 95 to record the video signal, and in particular, controlling the rising speed of the motor 88 when performing the recording operation. This will be explained with reference to FIG.

When the preparatory operation for recording is completed as described above, the controller 91 checks whether the recording trigger switch 95 has been turned on by pressing down the trigger button 96 in the second stage, unless the power is turned off. This will be repeated (step 531).

When the trigger switch 95 is turned on, the controller 91 switches the changeover switch 86 to the terminal R side (step 532), then operates the camera section 81 and the synchronization signal generation circuit 84, and also controls the rotation of the disk motor 88. A command is issued to the motor control circuit 89 (step 533). Incidentally, before starting the motor 88 in step S33, "1111" is input to the D/A converter 89' in advance.
", so that most of the power supply capacity of the power supply circuit 93 is applied to the motor 88, and the motor 88 is operated so as to make the start-up time as short as possible. (Step 5
100) Therefore, the time loss until the recording operation actually starts can be minimized.

In addition, after starting the motor 88 in step S33, it is determined whether or not the output of the power supply voltage detection circuit 194 is at the H level after waiting for a very short time, for example, several 10 to several 100 m5 ec (step 5 lots). (step 5102), and when it is not at the H level, it is determined that the capacity of the battery 193 has decreased, and the D/A converter 89' outputs 0100'' (step 5103).
The voltage applied to the motor 88 is lowered to extend the life of the battery 193. As a result, the camera section 81
The recording circuit 82 outputs a video signal synchronized with the synchronization signal H3 and VS from the camera section 8.
The video signal from 1 is processed as a recording signal (F'M modulation, etc.) (of course, in this state, the recording gate in the recording circuit 82 is off, so the changeover switch 86 for the recording circuit 82 is turned off). Although the head 5 is connected via the head 5, no recording is performed). On the other hand, motor control circuit 8
Reference numeral 9 indicates that the disk 2 is set to the field or frame frequency based on the speed signal FG from the motor 88, the rotational phase signal PG from the rotational phase detector 90, and the vertical synchronization signal vS from the synchronization signal generation circuit 84. The rotation of the motor 88 is controlled at a speed corresponding to the vertical synchronization signal vS and at a predetermined phase with respect to the vertical synchronization signal vS, and when the motor 88 starts to rotate at the specified speed and phase, The servo·
Set the lock-in signal SL to high. Here, after the controller 91 commands the operation of the motor 88, the control circuit 8
It is repeatedly checked whether the servo lock-in signal SL from 9 has become high (step 534).
, when the servo lock-in signal SL becomes high, a recording trigger is immediately given to the recording control circuit 83 (step 535). As a result, the recording control circuit 83 uses the synchronizing signals H3 and VS from the synchronizing signal generating circuit 84 to record one field or one frame period including the first vertical synchronizing signal vS immediately after this recording trie is given. The recording gate of the recording circuit 82 is turned on. As a result, a recording signal for one field or one frame is applied to the head 5 through the changeover switch 86, and is recorded on the disk 2 rotated by the motor 88 in exactly one revolution. Of course, in this case, the recording position of the vertical synchronizing signal vS is a predetermined rotational position with respect to the magnetic pin of the center core 3 shown in FIG.

The recording control circuit 83 records the l field or l as described above.
After recording for a frame is completed, the recording end signal RE is set high at the end. On the other hand, after the recording attempt, the controller 91 repeatedly checks whether the recording end signal RE has become high (step 836).
When this becomes high, the motor drive circuit 87 is commanded to rotate the step motor 49 in a normal step in order to move the head 5 to the next recording position, that is, by ITP in the direction of the arrow X (step 537). At this time, the counter 99
counts up by one. Next, the controller 9
Step 1 checks whether the mode changeover switch 97 is turned on (step 838), and if it is not turned on (in other words, this indicates that the single-shot mode is designated), the camera section 81 and the synchronization signal The operation of the generating circuit 84 is stopped, and the monitor control circuit 89 is commanded to stop the disk motor 88 (step 539). Thereafter, the controller 91 checks whether the detector 59 has turned off due to the movement of the head 5 (step 540), and if it has turned off, causes the display 92 to indicate the end of the disc (step 540). 541), hereafter
Recording is prohibited (step 542).

Hereinafter, when the switch 97 is off, that is, the single shooting mode is designated, and unless the detector 59 is turned off, each time the recording trigger switch 95 is turned on, each time the recording trigger switch 95 is turned on, the data is placed at a different position on the disk 2. Signals for l fields or l frames are now recorded.

On the other hand, if the mode changeover switch 97 is on in step 538 (that is, this indicates that the snapshot mode is designated), the controller 91 at this point switches the red trigger switch 95 to Check whether it is turned on (step 543), if it is not turned on, proceed to the previous step S39, but if it is turned on, it is further detected (step 544), if it is not turned off, it is for continuous recording. Wait for the elapse of a predetermined time Δt for determining the speed or rate (step 545), and once that time has elapsed, the process returns to the previous step S35 and the recording is triggered again.

If the detector 59 is off in step S44, the controller 91 stops the operation of the camera unit 81 and the synchronizing signal generator 84, and commands the motor 88 to stop, as in step S39 (step 846). After that, the process moves to step S41.

When the switch 97 is on, that is, when the snapshot mode is designated, as long as the recording trigger switch 95 is on, the above-described operation will record the differences on the disk 2 at a predetermined speed until the detector 59 turns off. A video signal for one field or one frame is continuously recorded at the position.

Incidentally, the speed or rate of continuous shooting in this case is determined in step S45.
It can be changed arbitrarily by making the waiting time Δt variable.

Also, in this recording operation, a counter 99 is incremented each time the head 5 moves to the next track after completing one track recording, and its contents indicate the current position of the head 5. Therefore, the counter 99
This output can be applied to the display 92 to display the initial position of the head 5.

Furthermore, in this embodiment, the head 5 is
When positioning the tracks to the recording position on the disk 2, start from the last recording position on the disk 2, that is, the 50th track position, and start in the reverse order of the specified order of the tracks at the time of recording, that is, the recording track position. Check the presence or absence of recording at each recording position in the reverse order of the numbering order, and check the ITP of the position where it is first determined that there is a record, and then proceed to the previous position, that is, in the order of the recording l/rack number. The unrecorded position immediately after the last recorded track is counted and stored in the latch circuit 100, and the head 5 is positioned at this position.
Even if the track has been recorded up to the middle and the middle track has been erased, the head 5 will not be positioned with respect to this erased track. For example, when moving the head 5 to the next recording position, it is necessary to determine whether or not there is recording at each moving position. It takes time to become possible, and the chance to record is lost,
Alternatively, the inconvenience of not being able to perform continuous recording properly can be resolved.

The above example shows a case in which the search for recording presence/absence of disc 2 is performed in descending order (incremental) starting from the 51st track side, but this also applies if the search is performed in ascending order (incremental) starting from the 5th track side. It's good. In this case, the system controller 91 is configured to perform control functions according to the operational flow shown in FIG.

In FIG. 4, steps with the same reference numerals as those in FIG. 3 indicate steps with the same content, and steps with a dash indicate corresponding steps.

In FIG. 4, after commanding the rotation of the disk motor 88 in step S04, the controller 91 performs step S04.
The motor 49 is continuously rotated in reverse until the carrier position detector 58 turns off, and the motor 49 is stopped when the detector 58 turns off (steps 805' to 5O7).

As a result, the head 5 is set to the Oth track.

Next, the controller 91 switches the switch 86 to the C side (step 5OS), and then checks the output of the recording presence/absence detection circuit 85 (step 5O9). If it is low, it outputs it directly, or if it is high, it outputs it to the latch circuit 100. After latching the output of counter 99 (step 5tO),
The motor 49 is rotated forward by ITP.

(Step 511). This operation is repeated until the head 5 reaches the 51st track and the carrier detector 59 is turned off (step S12'). In this way, when the head 5 reaches the 51st track, the final recording track number remains in the latch circuit 100°.

Now, when the detector 59 turns off, the controller 91 further rotates the motor 49 in the normal direction by several TP. This step is similar to step S16 shown in FIG. 3, and is provided to reset a switch that mechanically stores whether or not the jacket containing the magnetic disk 2 has been replaced.

Next, the controller 91 commands continuous reversal of the step motor 49 (step 17'), and during this time, the A=B output of the comparator circuit 101 is checked in step 81.
8) When this becomes high, the motor 49 is stopped (step 519). At this time, the head 5 is connected to the disk 2.
will have in the last recorded track position on
Therefore, the controller 91 is further instructed to rotate the motor 49 forward in steps corresponding to the ITP (step 527), and the head 5 is thus set at the unrecorded position immediately after this last recorded track. Hereinafter, the operations after step S20 are the same as in the case of FIG.

In the above embodiments and modifications, the recording track numbers on the disk 2 are sequentially numbered from the outer circumference of the disk to the center, but the numbering may also be done conversely from the center of the disk to the outer circumference. Good, 2nd to 4th accordingly
The operational flow shown in the figure has been slightly modified.

In the embodiments described above, the modes at the time of automatic positioning of the head 5 to the unrecorded position on the disk 2 are as follows:
, when the motor 88 is started when the automatic positioning of the head 5 has been completed in advance, and when the motor 88 is started after the automatic positioning of the head 5 has already been completed, the battery is removed immediately after the motor is started. 193 voltage is detected, the system controller 91
The voltage applied to the motor 88 was controlled by controlling the digital value output from the D/A converter 89', but such control is necessary when the capacity of the battery 193 is relatively low. , instead of battery 193,
For example, if an AC adapter is provided to convert commercial power (100 V AC) to a DC voltage equivalent to that of the battery 193, such control is not necessarily required. Therefore, battery 19
Motor 8 when using an AC adapter instead of 3
The digital value output to the D/A converter 89' when starting the motor does not need to be "0100" (it is sufficient to always make the motor startup high speed as "111 bit"). will be explained using FIGS. 5 to 7. FIG. 5 is a perspective view showing the external appearance of the recording device shown in FIG. 1 and a part of its contents. FIG. The figure is a perspective view showing the appearance of the battery pack 208.

In FIG. 5, elements having the same functions as those shown in FIG. 1 are designated by the same reference numerals, and their explanations will be omitted.

In FIGS. 5 to 7, 201 is a photographing lens;
2 is a finder section, 203 is a COD that converts the subject image formed by the photographing lens 201 into an electrical signal, 204 is a discrimination switch for discriminating the type of unit shown in FIGS. 6 and 7, and 205 is a corresponding switch. This is a detection pin for changing the state of the discrimination switch, and its position changes when it engages with the unit inserted into the battery box chamber 206 shown in FIGS. 6 and 7. Specifically, if the unit is an AC adapter having the discrimination recess A shown in FIG. 6, the discrimination switch 204 is turned off, and if the unit is a battery pack that does not have the discrimination recess A shown in FIG. The position of the detection bin 205 changes as the discrimination switch 204 turns on.

207 is a power cord, and 209 is a contact point for supplying power from the AC7 adapter 9206 and the battery pack 208 to a contact point (not shown) in the battery box chamber.

In this embodiment, when the battery pack 208 shown in FIG. 7 is inserted into the battery box chamber 206 shown in FIG. 5 and the discrimination switch 204 is turned on, the battery pack 208 shown in FIG. If the operation as described is performed, the AC adapter 206 shown in FIG. 6 is inserted into the battery box chamber 206 shown in FIG. 5, and the discrimination switch 204 is turned off, Step SO4' shown in the figure
In this case, instead of outputting "0100" to the D/A converter, "1111" is outputted to control the rise time to be the closest when starting the motor 88.In addition, in such a case, the capacity of the AC adapter 206 is Because of the large size, the power supply voltage does not drop, so step 5 shown in Figure 3
In the flow from IOI to 5103, step 5102
The flow then moves to step S34 without passing through step 5103.

Therefore, according to the embodiment shown in FIGS. 5 to 7, by determining the type of power source, the startup speed of the rotation of the motor 88 is always determined in any case when the power source has a large capacity such as an AC adapter. If the capacity of a power source such as a battery becomes very large, the startup speed of the rotation of the motor 88 is set high only when starting up the motor 88 to start recording to reduce the load on the power source battery. This makes it possible to extend the life of the battery.

In this embodiment, in order to determine the type of power source, the external shape of the power source is partially changed according to the type of power source, and the difference in external shape is detected using an input switch. However, the method is not limited to this method. The type of battery may be determined by providing a conductive pattern on the power source shown in FIGS. 6 and 7 and electrically detecting the conductive pattern, or by other methods capable of such determination. Of course, it is okay to have .

Furthermore, in this embodiment, two types of digital data, l111'' and 0100'', are shown as output from the system controller 91 to the D/A converter 89', but it is of course possible to use data other than these. .

Further, although the above embodiment shows an example of a still video recording device with an integrated camera section, the camera section 81 may of course be separate, and a battery may be used as the power source for the recording device. In addition to the type that uses a commercial power source, it may also be configured to use commercial power directly without using an adapter.

Further, the device is limited to a video signal recording device, and may be a device that records information such as audio signals or data. Furthermore, the recording method is not limited to magnetic recording either. Furthermore, regarding the record carrier, there are disk-shaped ones, external drum-shaped ones, or tape-shaped ones (for example, 8
(such as a truck audio recorder).

In the embodiment 1- above, a motor that rotates the magnetic disk is used as the first drive stage for displacing the relative position between the record carrier and the recording head.
In the case of a record carrier or a tape, it may be one stage that drives the drum and tape, or it may be a drive means that moves the head instead of moving the record carrier.

Further, when starting the driving means, the first starting mode limits the electric power supplied to the first stage to a first value, and the second starting mode limits the electric power supplied to the first stage to a value lower than the first value. Although the controller 91 is operated by software, it goes without saying that such a control means may be constructed by a hardware circuit.

<Effects of the Invention> As described above, according to the present invention, when starting the first stage of drive for displacing the relative position between the record carrier and the recording head, emphasis is placed on the rising speed of the first stage of drive. The first
Since the device has two startup modes: a first startup mode and a second startup mode that emphasizes power saving, both modes can be used appropriately depending on the situation.

,/ ,/ /′

[Brief explanation of drawings]

FIG. 1-1 is a block diagram of an electric circuit of a recording device according to an embodiment of the present invention, FIG. 1-2 is a circuit diagram showing a part of the motor control circuit shown in FIG. 1-1, and FIG. is the controller 91 when the power switch 94 shown in FIG. 1-1 is turned on.
3 is a flowchart illustrating a preparatory operation for recording performed by the controller 91 when the recording trigger switch 95 is turned on after the preparatory operation in FIG. 2 is completed.
FIG. 4 is a flowchart showing a modification of FIG. 3, and FIGS. 5 to 7 each show the external appearance of the recording device shown in FIG. 1 and part of its contents. They are a perspective view, a perspective view showing the appearance of an AC adapter 206, and a perspective view showing the appearance of a battery pack 208. 88--Motor, 89--Motor control circuit, 91--System controller, 204--Discrimination switch.

Claims (3)

[Claims] (1) A record carrier for recording a signal, a recording head for recording a signal on the record carrier, a driving means for displacing the relative position of the recording carrier and the recording head, and a drive means for displacing the relative position of the recording carrier and the recording head, when the driving means is activated. control means having a first activation mode that limits the power supplied to the means to a first value; and a second activation mode that limits the power supplied to the means to a second value lower than the first value. A recording device characterized by: (2) The recording device according to claim 1, wherein the record carrier is disk-shaped, and the driving means is a motor that rotates the disk-shaped record carrier. (3) The control means is a control means that sets the head to the first starting mode when shifting the head, and sets the head to the second starting mode when recording on the record carrier with the head. A recording device according to claim 2.