JPH0461648A - Tape cassette information reading device - Google Patents

Abstract

PURPOSE:To cope with two tape cassettes whose external forms are different by making at least one of a light emitting element and a light receiving element turnable, and turning the light emitting element or the light receiving element in accordance with a difference of the external form of the tape cassette. CONSTITUTION:When a large tape cassette 1 is loaded and a light emitting element 2 is turned on, an emitted light (a) reaches a prescribed position 1a on the surface of the body of th large tape cassette 1, becomes a reflected light (b) by an optical reflection factor of a prescribed position and is made incident on a light receiving element 3, and the light receiving element 3 is excited. Subsequently, in the case a small tape cassette 11 is loaded, an emitted light (c) irradiates by placing the light emitting element 2 so that a prescribed position 11a on the surface of the body is in an effective light emission angle of the light emitting element 2. The light receiving element 3 is turned by detecting a difference of the external form of the large tape cassette tape cassette 1 and the small tape cassette 11, and a reflected light (d) is made incident on the light receiving element 3 and the light receiving element 3 is excited.In such a way, it is possible to cope with two tape cassettes whose external forms are different.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an information reading device for a tape cassette used in a magnetic tape device.

2. Description of the Related Art Many information reading devices for tape cassettes used in conventional magnetic tape devices are related to erasing.
An accidental erasure prevention device having a configuration as shown in Publication No. -222ete was common.

The configuration will be explained below with reference to FIG. 2. As shown in the figure, a tape cassette 31 used in a magnetic tape device is formed with an accidental erasure prevention claw 32, and a position opposite to the accidental erasure prevention claw 32 when the tape cassette 31 is installed in the magnetic tape device. A detection lever 38 is rotatably supported on the magnetic tape device. Detection lever 3
8, the detection piece 38a at the tip is in contact with the accidental erasure prevention claw 32, and in the state (a) where the accidental erasure prevention claw 32 of the tape cassette 31 is now removed, the detection piece 38a is in contact with the accidental erasure prevention claw 32. The detection lever 38 rotates clockwise, and the spring 37 causes the accidental erasure prevention lever 33 to rotate in the same clockwise direction.
3a makes sliding by pressing the recording lever 34 impossible.

Next, the state where the accidental erasure prevention claw 32 is not removed (b)
Here, the detection piece 38a contacts the erroneous erasure prevention claw 32 and is rotated counterclockwise, and the erroneous erasure prevention lever 33 is also rotated counterclockwise by the detection lever 38 and spring 37.

At this time, the tip 33a of the accidental erasure prevention lever 33 is released from contact with the recording lever 34, and the recording lever 34 can be pressed and slid, allowing the magnetic tape device to shift to the recording state.

Problems to be Solved by the Invention In such a conventional erasure prevention device for a magnetic tape device, a tape cassette 31 installed in the magnetic tape device has a tape cassette 31 with a erroneous erasure prevention claw at a position opposite to the erroneous erasure prevention claw 32. It is determined whether or not erasing is possible based on the difference in displacement between the presence and absence of the 32. Once the erroneous erasure prevention claw 32 is removed, it is impossible to re-record as it is, so the erroneous erasure prevention claw 32 is removed for re-recording. There are problems in that it takes time and effort to add substitute means for 32, and there are restrictions on the detection method based on mechanical positional relationships when cassettes of different sizes and sizes are used in the same device.

The present invention solves the above-mentioned problems, and provides a tape cassette information reading device that has a high degree of freedom in detection position and can handle a plurality of objects having different external shapes.

Means for Solving the Problems In order to achieve the above-mentioned objects, the present invention provides a set of light emitting elements and light receivers that input light into a predetermined position of a tape cassette and receive reflected light from the predetermined position. The light-emitting element and the light-receiving element are both rotatable.

According to the above-described structure, the present invention rotates one of the light-emitting element and the light-receiving element, which can be rotated according to the size of the tape cassette, to move two large and small tape cassettes with different external shapes to a predetermined position on the surface of the body. Information on two large and small tape cassettes can be read by setting the optical reflectance.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG.

As shown in the figure, a light emitting element 2 is disposed near the side surface of the main body of the large tape cassette 1, facing the tape cassette, approximately at the midpoint of its thickness, and the same light receiving element 3 is placed parallel to the width direction from the light emitting element 2. It is arranged so that it can rotate freely.

To explain the operation in the above configuration, the magnetic tape device (
When the large tape cassette 1 is attached to a large tape cassette (not shown) and the light emitting element 2 is turned on, the emitted light (a) reaches a predetermined position (reflective surface) la on the surface of the main body of the large tape cassette 1. Depending on the optical reflectance of a predetermined position on the tape cassette body surface, the light that reaches the tape cassette is either absorbed by the matte surface made of a black resin material, or reflected by the smooth surface. When the light is reflected, it becomes a reflected light (b) and enters the light receiving element 3, and the light receiving element 3 is excited.

That is, a movable piece having two surface conditions as described above is slidably attached to a predetermined position 1a of the tape cassette 1. Alternatively, output signals of the excited and non-excited states of the light-receiving element 3 can be extracted by pasting two types of sheets with different surface states as described above.

Next, to explain the case of a small tape cassette, let us assume that a predetermined position on the surface of the main body of the small tape cassette 11 is 11a, and place the light emitting element 2 so that this predetermined position 11a is within the effective light emission angle of the light emitting element 2. For example, the predetermined position 11a is irradiated with luminescent light.

- The force light receiving element 3 detects the difference in the external shape of the large tape cassette 1 and the small tape cassette 11 and rotates the light receiving element 3. For example, the mechanical link mechanism is configured by a plunger device (not shown) or the like. It is rotated in the direction of A.

In this way, as in the case of the large tape cassette 1, when the reflectance of the predetermined position 11a of the small tape cassette 11 is high and light is reflected, the reflected light (d) enters the light receiving element 3 and the light receiving element 3 is excited. Ru.

In either case, information regarding the tape cassette can be read by inputting the output signal of the light receiving element 3 to a signal processing and control circuit (not shown) including a comparator.

As described above, according to the information reading device of the embodiment of the present invention, the light receiving element 3 is made rotatable, and the light receiving element 3 can be rotated in accordance with the difference in the external shape of the large tape cassette 1 and the small tape cassette 11. Two large and small tape cassettes 1
Alternatively, by setting the optical reflectance of the predetermined position 1a or lla on the surface of the frame 11, two large and small tape cassettes 1 or 1
Information about 1 can be read.

First, by making at least one of the light-emitting element and the light-receiving element rotatable, and rotating the light-emitting element or the light-receiving element in accordance with the difference in the external shape of the tape cassettes, it is possible to handle two tape cassettes with different external shapes, large and small. Information can also be read by setting the optical reflectance at a predetermined position on the surface of the building block.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an information reading device according to an embodiment of the present invention, and FIGS. 2(a) and 2(b) are plan views showing a conventional erroneous erasure prevention device. 1...Large tape cassette, 2...Light emitting element, 3
...Light receiving element, 11...Small tape cassette. ° Agent's name Patent attorney Shigetaka Awano Haka 1 name figure / -- One missing tape force set 2 - Part 9f:, Kanade 1 . 3--One light reception f/

Claims (1)

[Claims] Consisting of a pair of light-emitting element and light-receiving element that input light to a predetermined position of the tape cassette and receive reflected light from the predetermined position, and at least one of the light-emitting element and the light-receiving element is rotated. Tape cassette information reading device.