JPH0468694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image recording device that converts a subject image into an electrical signal and records it on a medium.

Background Art A great advantage of recording media such as magnetic sheets or magnetic tapes is that recorded information can be erased at any time and other information can be recorded. However, due to this advantage, there is a risk of accidentally erasing recorded valuable information or writing information twice. Conventionally, in order to prevent this type of accident, the above-mentioned magnetic recording medium is stored in a storage container such as a cassette, and a means for preventing erroneous erasure or double recording is installed in this storage container, and recording or reproduction is performed via this prevention means. Prohibiting accidental erasure or double recording on the device (e.g. disabling the recording button)
Prevention measures were taken.

However, in the conventional accidental erasure prevention measures, an operator accidentally loads a recording medium storage container in which an accidental erasure prevention means is set into a recording or playback device (hereinafter referred to as a recording device) and then attempts to record. When the recording device cannot be set to recording mode, it is often the case that the user realizes for the first time that a recording medium storage container equipped with an erroneous erasure prevention means has been loaded.

[Purpose of the invention]

In view of the above-mentioned points, it is an object of the present invention to provide an image recording device with improved operability.

For this purpose, the image recording device of the present invention has a converting means (corresponding to FIG. 7 33 in the embodiment) for converting a subject image into an image signal, and a recording medium having an erroneous erasure prevention means. Setting states of a recording means (also 55) for recording the image signal, an electronic finder (also 54) having a display section that displays an image according to the image signal, and a means for preventing accidental erasure of the recording medium (also 1a) a detecting means (also 18) for detecting, in response to the detection by the detecting means, preventing the recording means from recording on the recording medium, and setting the accidental erasure prevention means on at least a part of the display section of the electronic finder. control means (also 52) for changing at least a part of the image signal so as to display a state;
and means (also 53) for supplying a signal changed by the control means to the electronic finder.

A display device for preventing erroneous erasure, embodying the present invention, will be described below with reference to the drawings. The following description describes the means for preventing erroneous erasure in a recording medium storage device, the detection section and related parts in a display device for preventing erroneous erasure, the display section and related parts, and the order of one specific example of the present invention displayed on an electronic finder. I will explain.

Regarding Erroneous Erasing Prevention Means in Recording Medium Storage Container (FIGS. 1 and 2) FIG. 1 shows a cassette as an example of a storage container that stores a rotating magnetic sheet. In the figure,
1 is a cassette, 2 is a magnetic sheet, 1a is a so-called accidental erasure prevention claw, 1b is an opening for installing a magnetic head (not shown), and 2a is a shaft attachment part for passing a magnetic sheet drive shaft through the magnetic sheet. It is provided in the center of 2. As shown in FIG. 2, if the recording device is configured so that it cannot set the above-mentioned recording mode when loading the cassette 1 with the accidental erasure prevention claw 1a removed into the recording device, this will prevent accidental erasure or double writing. may be prohibited. On the other hand, if the cassette 1 with the claw 1a attached is loaded into the recording device, erasing or writing is possible. Since the means for this purpose are well known, their explanation will be omitted. Note that 1c in FIG. 2 shows the recess after removing the claw 1a.

Regarding the detection section and related parts in the display device for preventing erroneous erasure of the present invention (Figs. 3 to 5) The recording device equipped with the display device for preventing erroneous erasing shown in Figs. 3 to 5 is As shown in FIG. 4, recording or reproduction is performed with the cassette storage section 12 closed to the main body 10.

In FIG. 3, 1 is a cassette as an example of a recording medium storage container, 10 is a recording apparatus main body, 11 is a shaft, 12 is a cassette storage part, and the shaft 1
1 is pivotally supported on the main body 10. Reference numeral 13 denotes a spring which urges the cassette storage section 12 clockwise, but its rotation is restricted by a pin 14 at the position shown in FIG. The cassette 1 is loaded into the storage section 12 from the direction of arrow A.

18 is a detection lever, which is biased clockwise by a spring 20 around a shaft 19;
The arm 18a detects the presence or absence of the claw 1a on the cassette 1, the second arm 18b is pressed against one end 15b of the intermediate lever 15, which will be described later, and the third arm 18c
is in contact with one end 23a of a display lever 23, which will be described later. The intermediate lever 15 is biased counterclockwise by a spring 17 about the shaft 16, and in the state shown in FIG.
is pressed by the branch portion 12a, and is maintained in the position shown in FIG. 3 by the biasing force of the spring 13. Therefore, the detection lever 18 is also urged counterclockwise and maintains the position shown in FIG. 3. The biasing force of spring 13 is spring 1
It is necessary to make the urging force larger than that of the spring 7 and the spring 20. 22 is a pin that restricts the rotation of the intermediate lever 15 in the counterclockwise direction. Display lever 2 (described later)
3 is the third arm 18 of the detection lever 18.
It is configured to always follow c.

The erase switch 24 has contact pieces 24a and 24b.
When the contacts are open, erasing or writing can be performed on the magnetic sheet 2 by a magnetic head (not shown), but when both contacts are closed, erasing or writing is prohibited. There is. The third arm 18c of the detection lever 18 opens and closes both contact pieces.

In the above configuration, the cassette 1 from which the accidental erasure prevention claw 1a has not been removed is inserted into the cassette storage section 12.
When the cassette is loaded into the main body 10 as shown in FIG.
Since the pressing contact between the intermediate lever 15 and the one end 15a of the intermediate lever 15 is released, the intermediate lever 15 rotates counterclockwise due to the bias of the spring 17, comes into contact with the pin 22, and stops. As the intermediate lever 15 rotates, the detection lever 18 also rotates clockwise due to the bias of the spring 20, but when its first arm 18a comes into contact with the accidental erasure prevention claw 1a of the cassette 1, the rotation stops. be done. Since the contact pieces 24a and 24b of the switch 24 are in an open state, erasing or writing on the magnetic sheet 2 is possible. On the other hand, as shown in FIG.
The arm 18a falls into the recess 1c after removing the claw 1a, so the detection lever 18 rotates further clockwise than the state shown in FIG. 4, and the contact pieces 24a and 24b of the switch 24 close. Therefore, erasing or writing on the magnetic sheet 2 is prohibited. 21 in FIG. 5 is a pin that is used to activate the detection lever 18 when no cassette is stored in the storage section 12.
limit the rotation of.

Regarding the display section and related parts in a display device to prevent accidental erasure (Fig. 6) In Fig. 6, 23 is a display lever, which is biased clockwise by a spring 26 around a shaft 25. One end 23a is always in contact with the third arm 18c of the detection lever 18, as described above. On the other hand, a display board 27 is attached to the other end 23b. 31 is a photographing lens, 32 is a viewfinder, 33
is an image sensor.

When the detection lever 18 is in the position shown in FIG. 3 or 4, the display board 27 is positioned outside the optical path of the viewfinder 32, so that the photographer can confirm the display board 27 even when looking through the viewfinder. I can't. On the other hand, when the detection lever 18 further rotates as shown in FIG. 5, the display lever 23 rotates clockwise, and the display plate 27 attached to one end 23b of the display lever 23 is rotated as shown in FIG. The camera moves to position 27' and enters the optical path, allowing the photographer to know that a cassette equipped with an erroneous erasure prevention mechanism has been loaded.

In the apparatus shown in FIG. 6, the photographing optical path and the viewfinder optical path form separate optical paths, but in the case of a single-lens reflex optical system, it is also possible to display the image in the viewfinder optical path. In addition, display lever 2
3 is replaced by an electric switch, and the display board 27 is replaced by a display element such as a light emitting diode or a signal sound generator, thereby providing a visible display or display indicating whether or not the erroneous erasure prevention means is set. Acoustic display can be performed. Furthermore, it is also possible to directly detect whether or not the accidental erasure prevention claw 1a has been removed using the contact piece of the electric switch, and to operate the above-mentioned display section.

Regarding a specific example of the present invention displayed on an electronic viewfinder (FIG. 7) FIG. 7 shows a specific example of the present invention in which an electronic viewfinder such as a cathode ray tube or a liquid crystal matrix is used as a display section. In FIG. 7, the output current of the image sensor 33 is amplified by a processing circuit 51, converted into a video signal suitable for recording, passed through a control circuit 52 and a recording circuit 55, and is recorded on the magnetic sheet 2 by a magnetic head 56 in the recording mode. be done. On the other hand, the output of the control circuit 52 is supplied via a drive circuit 53 to an electronic finder display section 54 made of, for example, a liquid crystal matrix.

When the cassette 1 from which the accidental erasure prevention claw 1a has been removed is loaded, it is detected by a detection section such as the detection lever 18, and a signal indicating this is transferred to the control circuit 52, and the control circuit 52, blocking the supply of the video signal to the recording circuit 55;
Erasing or writing by the magnetic head 56 is prohibited. At the same time, a display is displayed on a part or the entire screen of the display section 54 to indicate that a cassette equipped with an erroneous erasure prevention means has been loaded. This allows the erroneous erasure prevention signal to be displayed more reliably. In this specific example, the accidental erasure prevention claw 1a
It is easy to modify the electronic viewfinder display section 54 to display a certain display when the claw 1a is removed, and to display another display when the claw 1a is not removed.

Effects of the Invention As described above, according to the present invention, when a recording medium on which an accidental erasure prevention means is set is loaded in an image recording apparatus, a display regarding the accidental erasure setting state of the recording medium is displayed to the photographer. Since we can give
Even for urgent records, the time for recording is not missed. For example, when applied to a video camera, the so-called shutter chance will not be missed. Further, according to the present invention, since the above-described display is performed on the electronic finder, the display can be performed more reliably, and the operability of the image recording apparatus can be improved.

Furthermore, according to the present invention, the setting state of the accidental erasure prevention means is displayed on at least a part of the display section of the electronic finder that reproduces the image signal corresponding to the subject image as a visible image. There is no need to provide a special configuration for this purpose, and the photographer can be made to reliably recognize such display as described above. Further, since recording is prevented on a recording medium equipped with an erroneous erasure prevention means, valuable recordings will not be accidentally damaged.

[Brief explanation of the drawing]

1 and 2 are perspective views of a magnetic sheet storage container with and without an accidental erasure prevention claw, respectively, and FIG. 3 is a display device for preventing accidental erasure embodying the present invention. Of these, side views showing the detection unit and related parts, Figures 4 and 5 are in Figure 3.
FIG. 6 is a perspective view showing the display section and related parts of the display device for preventing accidental erasure embodying the present invention, and FIG. FIG. 4 is a schematic diagram of another specific example of a display device for the purpose of the present invention. In the figure, 1 is a cassette, 1a is an accidental erasure prevention claw, 2 is a magnetic sheet, 10 is a recording or reproducing device main body, 12
is a cassette storage section, 13 is a spring, 15 is an intermediate lever, 18 is a detection lever, 23 is a display lever, 24
is the switch, 27 is the display board, 32 is the viewfinder,
54 is an electronic viewfinder display section, and 56 is a magnetic head.

Claims (1)

[Scope of Claims] 1. Conversion means for converting a subject image into an image signal; Recording means for recording the image signal converted by the conversion means on a recording medium having means for preventing accidental erasure; Displaying an image according to the image signal; Detection means for detecting the setting state of the erroneous erasure prevention means of the recording medium; Preventing the recording means from recording on the recording medium in response to the detection by the detection means; control means for changing at least a part of the image signal so as to display the setting state of the accidental erasure prevention means on at least a part of the display section of the display unit; means for supplying the signal changed by the control means to the electronic finder; An image recording device comprising: