JPS5834630Y2 - tape counter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape counter that counts rotational pulses generated as a tape reel rotates and displays the approximate position or running time of the tape based on the counted value.

In general, in a tape counter that counts the rotational pulses generated as the tape reel rotates and displays the approximate position and running time of the tape based on this counted value, the start of the tape corresponds to the counter value of zero. The accurate tape guide position button and tape running time are displayed only when the tape is in use.

Therefore, if you start with a tape that has not been rewound to its initial state, or if the counter value has not been reset to zero even after it has been rewound to its initial state, the beginning of the tape and the counter value of zero will not correspond. There was a risk that the user would misunderstand the approximate tape position or tape running time.

In view of the above points, the present invention was devised to solve such problems.The purpose of this invention is to notify the user of an incorrect display when the tape is started without rewinding. The objective is to provide a tape counter that can.

In order to achieve such an object, the present invention includes a processing device that executes a check program when starting a tape, and this processing device compares the rotation speed of the tape reel with a reference value using the check program. When the reference value is different from the reference value, it is determined that a start is to be made from the middle and a notification is issued.Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The drawing is a block diagram showing an embodiment of the tape counter according to the present invention, and shows the case of a device that automatically resets the counter value to zero when a tape is attached.

In the figure, 1 is a rotating body that rotates in the direction of the arrow in synchronization with the tape reel, such as a reel stand or a motor rotating shaft (clutch output side) (not shown), and 2 detects 10 rotations of this rotating body and rotates. A sensor that outputs pulses, 3 an amplifier that amplifies the rotational pulses from this sensor 2, 4 a movable contact 4
a and fixed contacts 4b, 4c, and 4d, and a switch/selection switch that is switched depending on the type of tape (C-30, C-60, C-120); 5 is a movable contact 5a and a fixed contact 5;
6 is a start check switch equipped with a movable contact 6a button and a fixed contact 6b, and in the case of an open reel, this start check switch 6 is a display changeover switch equipped with b and 5c. In the case of a cassette, it is configured to close in conjunction with the eject mechanism and to provide a counter zero reset signal to a microprocessor, which will be described later.

7 is a microprocessor, 8 is a read-only memory (
(hereinafter referred to as ROM), this ROM8 contains an arithmetic program that converts the recording time or playback time corresponding to each tape running amount when the tape is started from the initial position, Speed is "0"
It stores a zero check program for checking whether the tape has started from a certain position, and a tape selection program for selecting the type of tape and providing its basic data when performing calculations using the calculation program.

9 is a random access memory (hereinafter referred to as RAM) for displaying calculation results; 10 is an input/output circuit interface; 11 is a display for displaying the tape running time or approximate tape position by switching the display changeover switch 5;
2 is a check indicator, and 13 is a bus.

The rotating body 1 and the sensor 2 constitute a rotation detector of the tape drive source, and when a large number of slits are formed around the rotating body 1, the sensor 2 is composed of a light emitting element and a light receiving element, and detects the rotation. When a large number of permanent magnets are provided around the body 1, the sensor 2 can be composed of a Hall element, a reed relay, or the like.

The switched display changeover switch 5 connects its movable contact 5a to the reservoir contact 5b in the running time mode, and connects its movable contact 5a to the fixed contact 5c in the reference position mode.

Next, the operation of the embodiment shown in this figure will be explained.

First, if the type of tape is, for example, 60 minutes, the movable contact 4a of the tape selection switch 4 is brought into contact with the fixed contact 4b.

When displaying the tape running time, that is, the recording time or the playback time, the movable contact 5a of the display changeover switch 5 is brought into contact with the fixed contact 5b.

When the reel wound with this tape is mounted on a reel stand or the cassette tape is mounted on a reject mechanism, the movable contact 6a of the start check switch 6 contacts the fixed contact 6b and the counter is reset to zero.

Next, for example, when a recording switch (not shown) is closed, the tape 1 drive source is activated, and as the tape runs, the rotating body 1
rotates in the direction of the arrow.

Therefore, the sensor 2 detects the rotation of the rotating body 1,
Outputs rotation pulse.

This rotational pulse is amplified by the amplifier 3 and then input to the microprocessor 7 via the input/output circuit interface 10 and the bus 13.

Therefore, the microprocessor 7 counts these rotational pulses under the control of the tape counter program stored in the ROM 8, and then converts this count value using an arithmetic program so that the count value and recording time have a linear relationship. to correct.

The recording time obtained from this calculation result is the bus 13.
．． Display device 1 via input/output circuit interface 10
1 is displayed.

Also, at this start, the zero check program stored in the ROM 8 compares the number of revolutions of the tape reel with the regular number of revolutions at the time of start, and if the number of revolutions is less than the standard value, it is determined that the start is from an intermediate point, and an alarm (not shown) is activated. The check indicator 12 informs the user whether the check has been completed or not.

To explain the zero check program in detail, if the counter value is zero when the start signal is input, the number of revolutions of the take-up reel is compared with a reference value.

In the case of the embodiment shown in this figure, since the counter is reset to zero at the same time as the tape is loaded, the above comparison operation is performed by the subsequent start signal, and if the tape is rewound at the starting end 1, then The number of rotations of the take-up reel matches the reference value calculated from the predetermined diameter of the take-up reel, and the recording time displayed on the display 11 is accurate, so no notification operation is performed.

Note that if the recording operation is continued and then stopped once, and then a start signal is input, the comparison operation is not performed because the counter value is already not zero.

On the other hand, if the mounted tape has not been rewound at the start end, the tape will remain wound on the take-up reel, and the rotation speed of the take-up reel will be lower than the reference value. Notifies that the displayed value is not from the beginning of the tape.

Similarly, the playback time can also be displayed, but it is not necessary to change the tape selection switch 4 depending on the type of tape used.

Next, when displaying the tape reference position, it can be displayed on the display 11 by touching the movable contact 5a of the display changeover switch 5 to the fixed contact 5c.

In this case, the microprocessor 7 displays the count value of the rotational pulses from the amplifier 3 or its frequency division result on the display 11.

In this case as well, the number of revolutions of the tape reel at the time of the start is compared with the reference value using the zero check program at the time of start, as in the case of displaying the tape running time described above.

In addition, in the above-mentioned embodiment, the case where the counter value is automatically reset to zero by attaching the tape was explained as an example, but the present invention is not limited to this.
Of course, it is also applicable to a tape counter that is reset to zero only manually.

As described above, the present invention has the excellent effect of being able to notify that the display is not from the beginning of the tape when the tape is accidentally started from the middle.

[Brief explanation of drawings]

The drawing is a block diagram showing an embodiment of a tape counter according to the present invention. DESCRIPTION OF SYMBOLS 1... Rotating body, 2... Sensor, 4... Tape selection switch, 5... Display changeover switch, 6... Start check switch, 7... Microprocessor, 8...
...ROM, 9...RAM, 11...Display, 12
...Check indicator.

Claims (1)

[Scope of utility model registration request] A processing device is installed that counts the rotational pulses generated as the tape reel rotates, uses the counted value to display a tape counter that displays the approximate position of the tape or the gap between runs, and executes a check program when the tape is started. The tape processing device is characterized in that the check program compares the rotational speed of the tape reel with a reference value, and when the rotation speed of the tape reel is outside the reference value, it determines that the start is from an intermediate point and issues a notification. counter.