JPH02137166A - Equipment using magnetic recording medium - Google Patents

Abstract

PURPOSE:To eliminate the need for a specified switch or an exclusive port by switching an operation mode to a special operation mode, which is different from a normal operation mode, when it is detected that there s not a magnetic recording medium and there is an erase prohibiting click part. CONSTITUTION:When a floppy disk to have an erase prohibiting click part 8 is inserted, an idle track for recording is searched and in the case of a decided result, which is not generated in the normal use condition of an equipment, that there is the erase prohibiting click part 8 (recordable) in a condition that the floppy disk is not inserted, for example, a check mode program is executed to check the operation of the equipment. For example, the condition, which is not generated in the normal use condition, that there is the erase prohibiting click part 8 although the floppy disk is not inserted when a deck cover 3 is closed, is defined as a deciding condition and the check mode is executed. Thus, the specified switch to generate a mode switching signal or the exclusive port to input a mode switching signal to a microcomputer is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device that uses a magnetic recording medium such as a floppy disk, and which operates in a special mode other than the normal operation mode based on the function of the device, such as a special mode for inspection. The present invention relates to a determination means for performing the operation mode.

[Conventional technology]

In devices equipped with a microcomputer (hereinafter referred to as microcomputer), a check program is usually stored in addition to the normal operating program based on the device's functions, and the check program is executed during the manufacturing process or when the product is completed. GL and testing of the product is carried out. In this case, a means is required for determining and inputting which mode, an operation mode in which a normal operating program of the device is executed, and a check mode in which a check program is executed.

For example, in Japanese Patent Application Laid-open No. 108825/1982, in a camera that automatically controls various functions based on film information provided on the film magazine, recorded information stored in the film information storage section of the film magazine is A manual switch is provided between the reading section and a decoder that decodes the read information signal, and when a signal different from the film information signal from the film magazine is input by operating the manual switch, the film information signal is What is shown is a device that outputs a special operation signal different from that when it is manually operated. Also, JP-A-60-113
No. 215 discloses that when the information obtained by decoding the film information code provided on the film magazine is specific information, operations other than the normal operation of the camera, for example,
An example is shown in which a bulb photographing operation is performed.

Note that the conventional determination method described above uses the film information code provided on a specific film magazine, so it cannot be used with other media, such as a still video camera that records captured images on a floppy disk. It cannot be used in devices that use magnetic recording media.

Further, Japanese Patent Application Laid-Open No. 60-64343 discloses a device in which a specific switch is provided and a switching signal is input by the specific switch to execute a program for adjustment or inspection. Furthermore, in this embodiment, since the microcomputer has a dedicated board for testing, it is shown that the testing mode can also be switched by an input signal to the dedicated board.

[Problem to be solved by the invention]

As mentioned above, conventionally, a mode switching signal is generated and input to the equipment in order to distinguish between the normal operation mode and the check mode of the equipment. A switch is installed on the equipment, and a dedicated boat is installed to input the mode switching signal to the microcontroller.

By the way, as devices become more multi-functional, the number of various operation mode switches increases, as well as the number of input/output ports for microcontrollers that control device operations. It is becoming difficult to provide dedicated boards for specific switches and microcontrollers.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a device using a magnetic recording medium that enables execution of a check mode without increasing the number of specific switches or dedicated ports.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a means for detecting the presence or absence of a magnetic recording medium, a means for detecting the presence or absence of an erasure inhibiting claw on the magnetic recording medium, and a device function based on the detection result. In a device using a magnetic recording medium having a normal operation mode in which operation is performed, when it is detected that the magnetic recording medium is absent and the presence of the erasure prohibition claw is detected, the normal operation mode is activated. A special operation mode different from the operation mode of .

[Effect]

In a device that uses a magnetic recording medium configured as described above, the presence or absence of a magnetic recording medium and the presence or absence of an erasure prohibition claw for the recorded contents of the magnetic recording medium are detected, and the presence or absence of a magnetic recording medium is detected.
When a combination of states in which the magnetic recording medium has an erasure inhibiting claw (recordable state) is detected, which cannot occur in the normal operating state of the device, a transition is made to a special operating mode other than the normal operating mode.

〔Example〕

FIG. 1(a) shows an external view of a still video camera to which the present invention is applied, and FIG. 1(b) shows a front view of a 2-inch floppy disk used in the still video camera. In Figure 1 (a), button 1 is the release button that is pressed to the first step to measure the brightness of the subject and the distance to the subject, and the second button is the release button to shoot and record the image. A display window displays the track number of the floppy disk to be recorded in two digits, a lid 3 is a deck lid for inserting and ejecting the floppy disk, and a window 4a
and 4b is autofocus for 11-1 distance (
4Ilj distance window for AF), lens 5 is a photographic lens, window 6
1 is a finder objective window for checking the photographic screen, and window 7 is a 1-light window for automatic exposure (AE) for metering the brightness of the subject. Further, in FIG. 1(b), the claw 8 is an erasure prohibition claw that protects the recorded contents of the floppy disk, and
By removing the claw 8, it is possible to prevent the recorded contents from being erased.

Next, FIG. 2 shows a circuit diagram of a still video camera to which the present invention is applied. In the figure, a circuit block 11 is a microcomputer that performs sequence control of a still video camera, and a circuit block 12 is a control block that controls the operation of the Al light and the distance 11-1. The °C1 circuit block 13 is an LCD that displays the track number of the floppy disk in the display window 2, and the circuit block 14 is a photographic recording circuit consisting of a photographing section and a recording section, which are components other than the circuit blocks mentioned above. be.

The switch S1 is a light metering and distance measuring start switch that is turned on when the button 1 is pressed in the first step.
2 is a release switch that is turned on by pressing the button 1 to the second step. When the switch S1 is turned on, photometry and distance measurement are performed, and when the switch S2 is turned on, photographing and recording of the photographed screen onto a floppy disk are performed. switch S
Dc is a switch that detects the open/closed state of the deck lid 3, and is turned on when the deck lid 3 is closed and turned off when it is opened. The switch 5FLP is a switch for detecting whether or not a floppy disk is inserted, and is turned on if a floppy disk is inserted, and turned off if it is not inserted. Note that if the deck lid 3 is open, the floppy disk is not completely inserted and the floppy disk is turned off. The switch 5PTT is a switch for detecting the presence or absence of the erasure inhibiting claw 8, and is turned on when the deck M3 is closed and a floppy disk with the erasing inhibiting claw 8 is inserted. The switches mentioned above are connected to the microcomputer 11, and the on/off information of each switch is input to the microcomputer 11. Table 1 summarizes the on/off information for switches.

Table 1 Note that the presence or absence of a floppy disk is detected by mechanically turning the switch 5 when the floppy disk is completely inserted.
FLP can be switched, or a part of the floppy disk can be detected by an optical sensor and the switch 5FL can be switched.
This can be done by, for example, switching P. Detection of the presence or absence of the erasure inhibiting claw 8 can be performed in a similar manner. Furthermore, in the present invention, a situation is detected in which there is no floppy disk but there is an erasure prohibition claw 8 on the floppy disk, which cannot occur under normal usage of the device. For example, in the above-described mechanical detection method for a floppy disk, a floppy disk dummy is used that lacks the contact portion with the switch 5FLP so that the switch 5FLP will not be switched even if a floppy disk with an erasure inhibit claw 8 is inserted. This can be done by using

Next, the present invention will be explained in detail with respect to a still video camera according to the flowchart shown in FIG.

Normally, the microcomputer 11 checks whether a change has occurred in the switches (#5), and when a change occurs, first,
Determine the open/closed state of the deck lid 3 using the switch SDC (#10). If the switch SDC is off (the deck lid 3 is in the open state), set the flag FDc to "1"(#15) and switch to #5. Go back and check the changes in the switches again.

If switch SDC is on (deck lid 3 is closed)
, it is determined whether the flag FDC is set to 1 (#20), and if it is set to 1, the flag FDC is set to "0"(#25).

The flag FDC is a flag indicating the open/closed state of the deck lid 3, and is set to "1" when the deck M3 is open, and set to "0" when the deck M3 is closed.

Therefore, when the flag FDc is "1" in the determination in #20, it means that the deck M3 is closed, so it is set to "0". Further, changes in opening and closing of the deck lid 3 are detected based on a combination of the set contents of the flag FDC and the on/off state of the switch SDC. That is, the state of switch SDC and the contents of flag FDC are checked in #10 and #20, and it is determined that SDC is on (deck lid 3 is closed).
If the flag FDC is "1" (the deck lid 3 is in an open state), it is determined that the deck M3 that was open this time is closed. Further, if the switch SDC is on (the deck M3 is in the closed state) and the flag FDC is "0" (the deck lid 3 is in the closed state), it is determined that the deck lid 3 continues to be closed. .

Following #25, the presence or absence of the floppy disk and the presence or absence of the floppy disk erasure prohibition claw 8 are determined based on the on/off states of the switch 5FLP and the switch spT"r, and processing is performed based on the respective determination results (#
30~#50).

If a floppy disk with erasure prohibition claw 8 is inserted, search for an empty track for recording #3.
0 to #40), when the erasure prohibition claw 8 is absent (recording is not possible) (NO in #35 or #45), recording is not performed regardless of the presence or absence of the floppy disk, so the process returns to #5. In addition, when a judgment result that does not occur under normal usage of the device is that the erasure inhibit claw 8 is present (recording is possible) when no floppy disk is inserted, for example, a check mode program for testing the operation of the device ( (described later) (#50).

Table 2 summarizes the processing for the combinations of the presence/absence of the floppy disk and the presence/absence of the erasure inhibiting claw 8 of the floppy disk.

If flag FDC is set to “0” in #20 (
(the deck M3 is in the closed state), and the deck lid 3 continues to be in the closed state as described above. In this case, use the switch SDC to determine the presence or absence of a floppy disk (#55)
, if a floppy disk is inserted, then switch 5 determines whether or not there is an erasure prohibition claw 8 on the floppy disk.
If it is determined from the PTT (#60) that the erasure prohibition claw 8 is present, it is possible to record, so it is confirmed whether the switch S1 is on (#65). If no floppy disk is inserted (NO in #55), the erasure prohibition claw 8 of the inserted floppy disk is closed (or if recording is not possible (#55).
60 (N6) or when the switch S1 is in the OFF state, photographing and recording are not performed and the process returns to #5.

If the switch S1 is on in #65, perform Δp1 light and Al1 distance (#70), then check whether the release switch S2 is on (#75), and if it is on, take a photo. , record it on the floppy disk (#85), and return to #5. Also, #7
If the release switch S2 is off in step 5, check the state of the switch S1 (#80); if it is on, return to #75 and repeat steps #75 and #80 until the release switch S2 is turned on. . If the switch S1 is off in #80, the process returns to #5 and IIi
It performs processing from the determination of switches and switches to the above-mentioned release.

Next, FIG. 4 shows an embodiment of the check mode program. This figure is a flowchart of a check mode in which all light results are displayed on the LCD 13.

When you enter check mode at #50 in Figure 3, first
Check the status of the r edge S1 (#100). If the switch S1 is off, it waits until it turns on, and when it turns on, performs all light (#105).

Next, the integer part of the Bv value (Bv value) is displayed on the LCD 13.
#110. #115), then the al
The decimal part of the light value (Bv value) is displayed on the LCD 13 for 1 second (#120, #125), and the process returns to the flow of rKEYJ in FIG. 3 (#130).

In this embodiment, a case is shown in which the integer part and the decimal part of the photometric value are displayed twice on the LCD 13 that displays a two-digit number. If the number of digits displayed in L and CD13 is large, the photometric values can be displayed all at once. In addition, the display contents are not limited to photometric values; for example, other 11
It is also possible to display 3-distance data and the like.

Further, although this embodiment has been described with respect to a 2-inch floppy disk, the present invention can be implemented in common with devices using magnetic recording media such as floppy disks of different sizes, audio cassette tapes, video cassette tapes, etc. .

〔Effect of the invention〕

As explained above, according to the present invention, this cannot occur under normal usage conditions, for example, when the deck lid is closed and the erasure prohibition claw is present even though no floppy disk is inserted. Since the condition is used as a judgment condition and the check mode is executed when the condition is detected, there is no need to add a switch or the like to input a judgment signal for transitioning from the normal operation mode to the check mode. This eliminates the need to increase the number of input/output ports of the microcontroller by providing a special input port on the microcontroller to check the functions and operation tests of the equipment.

[Brief explanation of the drawing]

FIG. 1(a) is an external view of a still video camera to which the present invention is applied, FIG. 1(b) is a front view of a 2-inch floppy disk, and FIG. 2 is a circuit configuration diagram of a still video camera to which the present invention is applied. , FIG. 3 is a flowchart for explaining the present invention in detail, and FIG. 4 is a flowchart of one embodiment of the check mode. 11...Microcomputer, 3...Deck lid, 8...Erase prohibition claw, si, S2, SDC, 5FLP, 5PTT
”'Switch. Patent applicant Minolta Camera Co., Ltd. Agent
Person Patent Attorney Etsu Kotani Purpose
Chief Patent Attorney 1) Masayuki
Patent Attorney Takashi Ito 1 Figure 2 (b)

Claims (1)

[Claims] 1. A means for detecting the presence or absence of a magnetic recording medium, a means for detecting the presence or absence of an erasure inhibiting claw on the magnetic recording medium, and a normal operation mode in which operations are performed based on the functions of the device in accordance with these detection results. In a device using a magnetic recording medium equipped with a magnetic recording medium, when the absence of the magnetic recording medium and the presence of the erasure prohibition claw are detected, a special operation mode different from the normal operation mode is activated. A device using a magnetic recording medium, characterized in that: