JPS62172503A - Electronic still camera - Google Patents

Abstract

PURPOSE:To attain the additional recording without duplicated recording and the recording without erasure by erasing a track after head moving in the mode selected by a changeover means or making the head in standby when unrecording exists in the track after head movement. CONSTITUTION:A recording means, a reproducing means, a changeover means for erasure means, a head moving means 6 and a mode selection means are provided. The changeover means erases the track after the head movement when the mode selection means is in the 1st mode selection so as to make the state into the unrecording state for the preparation of the next recording. When the 2nd mode is selected, whether or not the track after the movement of the head 7 is recorded is discriminated and when recorded, the head is moved, the recording state of the next track is discriminated, and when the unrecorded track is found out, the head 7 is standby for preparing the next recording. Thus, the additional recording without duplicated recording and confirmation before in use and the recording similar to a new disk recording without the erasure by the other device before in use are recorded on the disk recorded on the way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic still camera that records video signals and the like on a rotating magnetic sheet.

Conventional technology An electronic still camera uses a cassette containing a rotating magnetic sheet to record video signals, etc. by moving a magnetic head in the radial direction of the rotating magnetic sheet to form an annular recording track. This rotating magnetic sheet has the advantage of being erasable and can be used any number of times.

Problems to be Solved by the Invention However, when using a recorded disk cassette with such an electronic still camera, do you have to check where the recorded data is, locate the beginning of the recordable track, and then record additional information? However, there were problems in that all tracks had to be erased before use, resulting in wasted time, missed photo opportunities, and poor performance.

The present invention solves these conventional problems, and in addition to detecting recordable tracks when a disc cassette is installed and performing additional recording, the present invention also performs additional recording from the first track even if it is recorded, in the same way as a new disc cassette. The present invention provides an electronic still camera that has a recording function and allows these functions to be arbitrarily selected.

Means for Solving the Problems The present invention provides head moving means for moving a magnetic head in the radial direction of a rotating magnetic disk to form an annular track;
a recording means for recording a signal on the magnetic sheet using the magnetic head; a reproducing means for reproducing the signal; an erasing means for erasing the signal; and a switching means for switching between the recording means, the reproduction means, and the erasing means. , mode selection means for selecting one of two modes, and the switching means erases the track after the movement when the magnetic head moves when the mode selection means selects the first mode. When the mode selection means selects the second mode, it is left in an unrecorded state in preparation for the next recording. If recorded, the magnetic head is moved again to determine the recording state of the next track, and if an unrecorded track is found, the electronic head is placed on standby in preparation for the next recording. It is a still camera.

Function: With the above-described configuration, the electronic still camera of the present invention has an unrecorded track detection function that works to prevent double recording without prior confirmation when additional recording is to be performed while leaving a partially recorded disc cassette. Additional recordings can be made without worrying about. In addition, if there is no need to preserve recorded video or other information, the erasing function will work without erasing all tracks on another device before using the disc, and the recording will start from the first track just like a new disc cassette. can. These functions can be easily selected by the mode selection means.

In other words, it has the effect that recording suitable for the purpose of use can be made with a simple operation, regardless of the condition of the disk case.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. FIG. 1 shows the configuration, and FIG. 2 shows the sequence.

■When a disk cassette is installed, the switch A1 detects the installation of the disk cassette, and the system control circuit 2 is activated. ■The disk motor control circuit 3 controls the disk motor 4.
is rotated at a predetermined number of rotations to give a predetermined rotation to the magnetic sheet 6.

(2) Also, the head moving machine 6 is operated by the system control circuit 2, and the magnetic head 7 is moved to the first track position.

Next, use switch B8 to select whether to record horizontally on empty tracks or to record from the first track regardless of whether or not it is recorded.Since this is not particularly relevant to the sequence, it is omitted in Figure 2. selects field recording or frame recording with switch C9. In field recording, one field is recorded on one track, and in frame recording, two fields are recorded using adjacent tracks, each recording one image.

■When sequential recording from the first track is selected with switch B8, the erase gate generating circuit 1o is activated by the system control circuit 2.
is activated and the signal from the erase signal generation circuit 11 is transmitted from the erase amplifier, B, 12.13 to the switch El on the erase (RR8) side.
, F, 14.16 and the recording (RKC) side (7) The erase operation is performed on the magnetic sheet 6 via the magnetic head 7 through switches R, G15, 17.

' ■ After that, the camera is placed on standby in a recordable state, and when a recording signal is given to the system control circuit 2 from the release switch (not shown), ■ Switches D and F14.16 switch to the recording (REC) side and begin recording. Ru.

(2) After recording is completed, the head moving mechanism 6 operates on the magnetic head 7 in response to a signal from the system control circuit 2, and moves to the next track. (2) If the track has not yet been completed, the process returns to (3) and repeats the same procedure as described above.

This series of operations is repeated for each track when field recording is selected by switch C9, and for two adjacent tracks when frame recording is performed.

■Also. When the switch B8 searches for an empty track and selects recording, the [phase] switch IC, G15.17 switches to the playback (PLAY) side by the signal from the system control circuit 2, ■First, the output of the first track is sent to the magnetic head. Pick up and play Ampum at 7,
B, 18. Envelope detector circuit B, via 21
19,22. Signal presence/absence discrimination circuits A, B, 20.23 determine whether recording is being performed or not. If recording is being performed, the system control circuit 2 operates the head moving mechanism 6 and the magnetic head 7 moves to the next track. The procedure is the same as the operation described above.

■If no data is being recorded, it will go into standby mode.

At this time, if field recording is selected with switch C9, the system will detect that there is one empty track and go into standby mode, and when a recording signal is given from the release switch etc., the system control circuit 2 will be activated and the switch will be activated. D, E, and 14.15 perform recording in place of the recording (RICG) side. After recording is completed, an empty track is detected again as described above and the standby state is entered, and these series of operations are repeated. In the case of frame recording, when an empty track is detected, the next track is also determined, and a position where two consecutive empty tracks exist is detected and standby is performed. Recording is performed by the system control circuit 2, which operates switches D, E, and F in the same way as field recording.

G, 14, 16, 16, and 17 perform recording on behalf of the recording side, and after recording is completed, as mentioned above, it detects that there are two consecutive empty tracks and enters a standby state, and repeats this series of operations. become.

In these recording signals, an image of the subject 24 passes through an optical system including a lens 26, an aperture 26, etc., is imaged on an imaging device 27 such as a CAD, and is converted into an electrical signal, and is converted into an electrical signal by an imaging process circuit 28. After passing through the recording process circuit 29, the switches D, E, F are sent from the recording amplifier 30 as described above.

G, 14, 15, 16, and 17 are recorded on the magnetic sheet 6 by the magnetic head 7.

In addition, the switch A1 for detecting the attachment of a disk cassette is used in conjunction with an accidental erasure prevention claw detection switch (not shown) provided on the disk cassette, and if there is no accidental erasure prevention claw,
It may be configured such that it is determined that there is no disc cassette and no -cut recording is performed.

On the other hand, in the erasing operation, if sequential recording from the first track is selected with switch B8, the erasing operation will be performed on two consecutive tracks regardless of which mode, field recording or frame recording, is selected with switch C9, and the other operations are the same. It doesn't matter if you record it. This may be more convenient when the magnetic head T is constructed using an in-line head having two total gaps. of course,
In the above-described embodiment, when sequential recording from the first track is selected with the switch B8, the system control circuit 2 first switches the switches D, R, F, G, and 1a.

15, 16, 17 are set to the playback (PLAY) side so that the recording signals on the magnetic sheet 6 can be played back by the magnetic head 7, and the playback amplifiers A, B, 18, 21. Signal presence/absence discrimination circuit B, 2 via envelope detection circuit B, 19.22
0.23, it is determined whether or not there is a recording signal, and if it is recorded, it is erased by the same operation, and if it is not recorded, it may be set in a standby state without performing the erasing operation.

Effects of the Invention As described above, the electronic still camera of the present invention provides the following effects.

Even when using a partially recorded disc cassette, additional recording can be made without worrying about double recording without checking before using the disc. Also, you can record from the first track just like a new disc cassette without erasing it with another device before use, and since you erase the next track immediately after recording, you don't miss a chance to start recording. do not have.

Furthermore, since the aforementioned operations can be selected with simple operations, recording can be performed on a disc cassette in any state according to the purpose, which is extremely convenient.

[Brief explanation of drawings]

FIG. 1 is a control block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing its sequence. 1...Switch on, 2...System control circuit, 6...Magnetic sheet, 7...Magnetic head, 8...Switch B , 9...
Switch C110... Erase gate generation circuit, 1
1... Erasing signal generation circuit, 12... Erasing amplifier, 13... Erasing amplifier B, 18...
... Reproduction amplifier, 19 ... Envelope detection circuit, 20 ... Signal presence/absence determination circuit, 2
1...Regeneration amplifier B122...Envelope detection circuit B, 23...Signal presence/absence determination circuit B0 Name of agent Patent attorney Toshi Nakao and 1 other person 2nd
figure

Claims (1)

[Claims] A head moving means for moving a magnetic head in the radial direction of a rotating magnetic sheet to form an annular track, a recording means for recording a signal on the magnetic sheet using the magnetic head, and a reproducing means for reproducing the signal. , comprising an erasing means for erasing a signal, a switching means for switching between the recording means, a reproduction means, and an erasing means, and a mode selection means for selecting one from two modes, and the switching means includes the mode selection means. When the magnetic head selects the first mode, when the magnetic head moves, the track after the movement is erased and left in an unrecorded state in preparation for the next recording, and when the mode selection means selects the second mode. When the magnetic head moves, it is determined whether or not the track after the movement has already been recorded, and if recorded, the magnetic head is moved again and the recording state of the next track is determined. An electronic still camera characterized in that when a recording track is found, the magnetic head is placed on standby in preparation for the next recording.