JPH01192070A - Cassette tape - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a cassette tape.

Conventional technologyCassette tapes can be easily recorded and played by anyone, and they are the main type of tape used in tape recorders. Furthermore, even if a tape has been recorded several times, it can be recorded any number of times by erasing it with an erasing head, which is very convenient.

However, it often happens that tapes with important content that you want to save are erased because you press the record button instead of the play button. In order to prevent this erroneous erasure, the cassette tape has a tab for preventing erroneous erasure.

The conventional cassette tape's accidental erasure prevention tab will be described below with reference to the drawings. FIG. 3a shows a conventional cassette tape. In the figure, reference numeral 1 indicates a tab for preventing erroneous erasure on the front side, and numeral 2 indicates a tab for preventing erroneous erasure on the B side.

When recording a cassette tape and want to prevent accidental erasure,
As shown in Figure 3, the tabs 1.2 for preventing accidental erasure on each of the fifth and B sides are broken off and a detection hole is made. When a tape recorder detects this detection hole, it cannot record, and even if the record button is pressed by mistake, it will not record, thereby preventing accidental erasure.

If you want to record again with a tape whose accidental erasure prevention tab 1.2 has been broken in this way, you can record again by pasting cellophane tape 3 or the like to cover the detection hole, as shown in Figure 3C. .

Problems to be Solved by the Invention However, with the above configuration, if you want to record again on a cassette tape whose accidental erasure prevention tab has been broken, it is necessary to perform the troublesome work of blocking the detection hole with cellophane tape or the like. In particular, in the case of non-position tape such as chrome tape, the bi-position detection hole is located right next to the detection hole for preventing accidental erasure, so there is a risk that the cellophane tape may block the bi-position detection hole. However, special attention is required. As described above, there has been a problem in that very complicated work is required to re-record a cassette tape whose tab for preventing production membrane erasure has been broken.

In view of the above-mentioned problems, the present invention provides a cassette tape with a function of easily switching between an erasure prevention state and a recordable state at any time.

Means for Solving the Problems In order to solve the above problems, the cassette tape of the present invention has the following features:
It is provided with a detection hole for preventing erroneous erasure, a long and thin plate that can be opened and closed above the detection hole for preventing erroneous erasure, and a knob for moving the plate.

Effect of the Invention With the above-described configuration, the present invention makes it possible to close or open the detection hole for preventing accidental erasure by operating the knob and moving the plate above the detection hole for preventing accidental erasure, thereby creating a state in which recording is possible. You can easily switch between erasure-proof status and name.

EXAMPLE Hereinafter, a cassette tape according to an example of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a cassette tape in one embodiment of the present invention.

It shows. In FIG. 1, 4 is the main body of the cassette tape, 6 is a detection hole for preventing accidental erasure, 6 is a plate for blocking the detection hole, and 7 is a knob attached to the plate for moving the plate. The plate 6 has elasticity and can be bent freely along the cassette tape body 4.

The operation will be explained below using the drawings. FIG. 2a shows a state in which the knob 7 shown in FIG. 1 is turned upward and the detection hole 6 for preventing erroneous erasure is blocked by the plate 6. In this state, recording is possible because the detection hole 5 for preventing erroneous erasure is closed. After recording, if you want to prevent erasure, use the second
As shown in the figure, lower the knob 7 and move the plate 6 to open above the detection hole 6 for preventing mistaken erasure. By doing this, erroneous erasure can be prevented. A and b in FIG. 2 can be freely switched using the knob 7.

As described above, according to this embodiment, by providing a plate and a knob that move over the detection holes for preventing accidental erasure, it is possible to freely switch between the recordable state and the erasure prevention state.

Effects of the Invention As described above, according to the present invention, by providing a plate and a knob that move over the detection hole for preventing accidental erasure, the cassette tape can be easily switched between the recordable state and the erasure prevention state at any time. be able to.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a cassette tape according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the cassette tape shown in FIG. 1 showing a recordable state and an erasure prevention state. FIG. 4...Cassette tape body, 6...Detection hole for preventing accidental erasure, 6...Plate, 7...
Knob. Name of agent: Patent attorney Toshio Nakao and 1 other person 4-
5-Knob 7-Knob 1st figure 5-Section elimination test L 6--7-Knob 2nd figure (a) to (b)

Claims (1)

[Claims] A cassette tape comprising: a detection hole for preventing erroneous erasure; a plate that can be opened and closed above the detection hole for preventing erroneous erasure; and a knob for moving the plate.