JPH01201860A - Electronic still camera - Google Patents

Abstract

PURPOSE:To prevent recording on a disk from being checked compulsorily by ejecting and from being recorded on a bedewed disk by generating an alarm when bedewing is generated in a state where the magnetic disk is loaded on a camera. CONSTITUTION:A controller 30 performs the reading of a various kinds of switches other than the rotation control of the magnetic disk 11 and the recording control of a video signal, and the control of a camera operation based on the above reading and the issuing of a bedewing alarm based on the detection of the bedewing. When a bedewing sensor 7 detects a bedewing state, a flag FO is set, and it is stored even when a power source is disconnected, and when the power source is applied, the alarm such as the display 8 of the bedewing, etc., is issued. Since such state is not canceled until the bedewing state is eliminated and also, the ejecting operation of the disk 11 is performed, it is possible to prevent the recording on the disk 11 ejected by operating an eject button by an operator and whose state is checked compulsorily and receiving an adverse effect from being performed.

Description

[Detailed Description of the Invention] Summary of the Invention In an electronic still camera that records still video signals on a magnetic recording medium such as a video floppy, the electronic still camera is equipped with A dew condensation detection operation is performed on the magnetic recording medium that is installed, and if dew condensation is detected, a dew condensation warning is issued while the power switch is on.

This dew condensation warning is canceled only when the magnetic recording medium is ejected from the camera.

BACKGROUND OF THE INVENTION This invention utilizes a solid-state electronic image sensor (for example, a CC
The present invention relates to an electronic still camera that captures an image using D) and records its output video signal on a magnetic recording medium (hereinafter referred to as @ki disk).

Condensation may form on the camera if the camera is left in a high humidity environment or if the camera's environment undergoes sudden temperature changes. If condensation forms on a camera loaded with a magnetic disk, it will often have an adverse effect on the internal magnetic disk, so use of the camera under such conditions should be avoided as much as possible. However, the operator is often unaware that condensation has formed on the camera.

SUMMARY OF THE INVENTION OBJECTS OF THE INVENTION An object of the present invention is to provide an electronic still camera that can notify when there is dew condensation when a magnetic disk is loaded in the camera.

Structure and Effects of the Invention The electronic still camera according to the present invention includes a loading detection means for detecting that a magnetic recording medium is loaded in the camera;
Condensation detection means for detecting dew condensation near the loading point of the magnetic recording medium, warning means for generating a dew condensation warning if dew condensation is detected when the power switch is on, and power switch turned on. The present invention is characterized in that it includes means for canceling the warning in 1- on the condition that no dew condensation is detected and the magnetic recording medium ejecting operation is performed.

As described above, according to the present invention, when a magnetic disk is loaded in the camera, the dew condensation detection operation is always performed and the results are stored, regardless of whether the power switch is on or off. If there is memory of condensation detection when the power switch is on, a condensation warning will occur. This allows the camera operator to know that dew condensation has been detected. Even if the dew condensation state is no longer present, the dew condensation warning is maintained as long as the magnetic disk is not ejected. Therefore, the operator is forced to eject the magnetic disk and examine it. This prevents recording onto a magnetic disk with dew condensation.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a block diagram showing the electrical configuration of an electronic still camera.

The operation of each part of the electronic still camera and the overall operation are supervised by a control device 30. This control device 30 is composed of a central processing unit, preferably a microprocessor (hereinafter referred to as CPU), a memory that stores its programs and necessary data, and an interface with each peripheral element circuit, device, etc. There is.

A magnetic disk 11 on which video signals are recorded is housed in a disk pack (path shown), and when this magnetic disk 11 is loaded into the camera body, it is attached to the spindle of a disk drive motor 38 at its center. Ru. A state in which the magnetic recording head 31 (two magnetic heads are provided in a frame recording capable device) is movable in the radial direction of the magnetic disk 11 so as to be in contact with the magnetic recording surface of the mounted magnetic disk 11. It is located in In addition, the magnetic flux of the chucking permanent magnet leaking from the magnetic body (the path shown in the figure) provided in the core of the magnetic disk 1.1 is detected, and one pulse P is generated for each rotation of the magnetic disk 11.
A phase detector 32 that generates C is provided close to the core of the magnetic disk 11.

A plurality of (for example, 50) tracks are provided concentrically on the magnetic disk 11 . Guard bands are provided between adjacent tracks, e.g.

Track width is 60μm, guard band width is 40μm
m,) U・Tsuku pitch is 100 μm.

The 50 tracks on the magnetic disk 11 are numbered in order from the outermost track No., 1-No., track numbers up to 50,
is attached. A home position HP is located outside of track No. 1.

The disk motor 33 is feedback-controlled by the servo control circuit 34 so that it rotates at a constant rotation speed, for example, 3.800 r, p, m.

Also the servo control circuit 34. The motor 33 is started and stopped in accordance with commands from the control device 30. Phase detector 3
The detection pulse PG from 2 is input to the control device 30. In this embodiment, the magnetic disk 11 is 3.60 Or, p,
11. Since it rotates at a constant speed, 1 rotation per 1/60 second
A track worth of video signals, that is, one field of FM modulated video signals is recorded by the magnetic head 31.

The magnetic head 31 is supported movably in the radial direction of the magnetic disk 11 and is controlled to be moved in the same direction by a transfer drive control device 35. The control device 30 sends instructions to the device 35 regarding the direction and amount of movement of the magnetic head 31.
give to The device 35 includes a step motor, and the magnetic head 31 is moved in proportion to the rotation angle of the step motor.

Since video signals are recorded while the magnetic disk 11 is being rotated, a regulating plate 28 is provided to maintain good contact between the magnetic head 31 and the magnetic disk 11 at all times.

The imaging optical system 9 provided in the electronic still camera is composed of an imaging lens system 41 for forming a portrait image, an aperture 42, and an optical shutter 43. The diaphragm 42 is controlled by the control device 30 based on the light reception signal level of a light receiving element (path shown) arranged in the optical path, and the optical shutter 43 is controlled by a switch 56 that is turned on by pressing the shutter release button 6. is controlled by a controller 30 in response to input from the controller 30.

At the focal plane of the optical system 9, a solid-state electronic imaging device 44 consisting of a two-dimensional imaging cell array, such as a COD, is arranged. The video data stored in the imaging device 44 is read out as a serial video signal in synchronization with vertical and horizontal synchronizing signals, and the recording signal processing circuit 45 FM modulates the luminance signal component and chroma signal component. The modulated signals are combined and applied to the magnetic head 31 via the recording amplification circuit 4B.

In order to perform a track search including processing for identifying recorded tracks and unrecorded tracks, the read signal from the magnetic helad 31 is applied to an envelope detection circuit 47 via an amplifier circuit 46. Here, the envelope of the read signal is detected, A/D converted, and input to the control device 30.

The control device 30 controls the rotation of the magnetic disk 11 described above,
In addition to controlling recording of video signals, it also reads various switches, controls camera operations based on the reading results, and issues a dew condensation warning based on dew condensation detection, which will be described later.

Various switches include a power switch 51. magnetic disk 1
Load ◆ End switch 52. which detects that the openable and closable packet housing the disc bag with built-in 1 is closed. A back switch 53 that detects that a disc back is stored in a closed bucket
．． There is a home position switch (path shown) that detects that the magnetic head 31 is at the home position HP.

The control device 30 performs a key scan routine at regular intervals (for example, 1760 seconds). In this key scan routine, the control device 30 sends out key scan pulses to the above-mentioned switch group, and when the pulses are returned, The on/off status of the switch is detected based on whether the switch is turned on or off.

A dew condensation sensor 7 and a dew condensation indicator 8 are further connected to the control device 30 . The dew condensation sensor 7 is, for example, a humidity detector and is placed near the magnetic head 31. Based on the humidity data from the sensor 7, the control device 30 determines that there is condensation when the humidity exceeds 90%, for example.

As a condensation warning device.

In addition to the dew condensation indicator, there are other devices such as a buzzer.

The memory of the control device 30 stores information such as turning on the power switch 51 and
Power supply flag F for storing off state, magnetic disk 11
A magnetic disk flag FF is provided to store whether or not a disk is loaded, and a dew condensation flag FD is provided to store a dew condensation state. The power supply flag FA is set (-1) and reset (-0) based on the result of the key scan routine. The state of the power switch 51 may be read by an interrupt rather than by the key scan routine. The magnetic disk flag FP is determined based on the key scan routine of the load end switch 52 and back switch 53. For example, if the back switch 53 detects a magnetic disk, it is set to 1 (magnetic disk loaded).

When the load end switch 52 detects the release of a packet, it is reset to 0 (magnetic disk ejection). The dew condensation flag F is set and reset in the dew condensation process described below.

FIG. 2 shows dew condensation detection processing and its warning processing. This process is performed periodically, for example every 10 to 20 minutes. Of course, the cycle of this process can be set arbitrarily.

First, whether the power is turned on or off is checked based on the state of the power flag FA of the control device 30 (step 130).
. When the power is off, the control device 30 is in a standby state. At this time, the control device 30 has an auxiliary power source (not shown).
Power is supplied by

When the power is off, only the dew condensation state detection process is performed. Furthermore, if a dew condensation condition is detected before the power is turned off, the memory of the dew condensation condition is retained. That is, F
It is held at D-1.

First, the power-on display and the dew condensation warning display on the display 8 are erased (step 61). Next, it is determined whether the dew condensation flag FD is set to 1 (step 62
). If flag FD is 1.

As described above, the memory of this dew condensation state is maintained. If the flag FD is 0, it is checked whether there is dew condensation or not.

That is, the output of the dew condensation sensor 7 is read, and it is determined whether or not there is condensation based on this read data (step 63). If there is a condensation state and a magnetic disk is loaded (FF-1), the dew condensation flag FD is set to 1 (YIES in steps 63 and 64, step 65).

If there is no dew condensation, or even if it is determined that there is dew condensation, if the magnetic disk 11 is not loaded (No in step 64), the dew condensation flag FD is not set.

If the power is on (YES at step 60), the dew condensation flag FD is checked (step 66).

If the flag FD is 1 (YES at step θ6), dew condensation is displayed on the display 8 in any case (step 67). Upon seeing this display, the operator is expected to open the get, eject the magnetic disk, and check the magnetic disk.

Based on the output of the dew condensation sensor 7, it is determined whether or not there is dew condensation (step 68). If it is determined that there is dew condensation, the dew condensation flag FD is set to 1 (step 69).
. If there is no condensation, it is checked whether the magnetic disk 11 is loaded in the camera based on the state of the magnetic disk flag Fp (step 70). magnetic disk 1
If 1 is loaded, the process ends immediately. If the magnetic disk 11 is not loaded, the dew condensation flag FD is reset to 0 (step 71).

The processes of steps H, 70, and 71 will be timely if the detection signal (key scan result) is used as an interrupt process when a packet is opened. That is, if there is no dew condensation when the packet is opened, the dew condensation flag FD is reset to 0.

In this way, when it is determined that the condensation state is present and the dew condensation flag Fo is set to 1, the dew condensation state is no longer present.
As long as the magnetic disk is not ejected, the dew condensation flag Fn is held at 1 and the dew condensation display continues. Therefore, the operator is forced to release the packet by pressing the eject button, take out the magnetic disk, and secure its condition.

Also, when the dew condensation flag FD is set to 1, all operations other than the magnetic disk ejection operation (shutter,
Since all operations (including release) are prohibited, recording on the magnetic disk that is adversely affected by condensation can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the electrical configuration of an electronic still camera. FIG. 2 is a flow chart showing dew condensation processing. 7... Condensation sensor. 8... Condensation indicator. 11...Magnetic disk. 30...control device. 51...Power switch. 53...Pack φ switch. Fo... Condensation flag. that's all

Claims (1)

[Claims] Loading detection means for detecting that a magnetic recording medium is loaded in the camera; dew condensation detection means for detecting dew condensation near the loading point of the magnetic recording medium; when the power switch is on, A warning means that issues a condensation warning if a condensation condition is detected, and cancels the above warning on condition that no dew condensation is detected and the magnetic recording medium ejection operation is performed while the power switch is on. An electronic still camera equipped with means for