JPS5839593Y2 - Cassette tape accidental erasure prevention device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a device for preventing accidental erasure of a cassette tape.

Conventionally, in cassette tapes called normal tapes, an erasure control plate is inserted into a guide groove provided above the detection hole for preventing erroneous erasure in order to prevent erasure due to erroneous operation, and by sliding the plate, the cassette tape is The erasure prevention hole was opened or closed to prevent erroneous erasure or to enable re-recording after erasure.

Therefore, the applicant of the present application applied
In this issue, an aperture consisting of an erroneous erasure prevention detection hole and a tape detection hole is provided on the rear side of the cassette case, and a first erasure mechanism is provided that holds the tape detection hole in a closed state and opens and closes the erroneous erasure prevention detection hole. A control plate and a second erasure control plate that has an opening and holds the tape detection hole in an open state and controls the opening and closing of the accidental erasure prevention detection hole are selected in the opening depending on the type of tape to be stored. To provide an accidental erasure prevention device that makes it possible to use a common cassette case by incorporating a normal tape and a special cassette tape such as a chrome tape into the same shape.

The present invention is an improvement on the invention of the prior application, and uses a normal tube and a special cassette tape such as chrome tape to make the cassette case common, and also makes it possible to make the two upper and lower cassette halves that make up the cassette case common. It provides equipment.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 4, 1 is an accidental erasure prevention detection hole, 2 is a tape detection hole, and a guide groove 3 is provided at the top of both holes, and the first and second erasure control The plates 4 and 5 are the guide groove 3
The opening/closing of the erroneous erasure prevention detection hole 1 and the tape detection hole 2 is controlled by sliding.

Here, as shown in FIG. 2, a locking protrusion γ is provided at the center of the upper surface 6 of the first erasing control plate 4, and a button is provided on the upper surface 6 of the second erasing control plate 5, as shown in FIG. Locking protrusions 9 are provided on both sides of 8.

Moreover, on the back side 12 of the pair of cassette files 10 and 11,
The tenth engagement groove 13, the second engagement/coupling groove 14, and the third retaining groove 15 with which the locking protrusions 7 and 9 engage are in each half 1.
0.11, and by providing the engagement grooves in this manner, the shapes of the cassettes 10 and 11 are made the same.

Note that the retaining groove 14 is provided only in the center of the back surface 12 so as to engage only with the locking protrusion 17.

Therefore, when the first erasure control plate 4 is assembled into the guide groove 3, the locking protrusion 7 engages with the second engagement groove 14, thereby blocking both the erroneous erasure prevention detection hole 1 and the tape detection hole 2. state, making it possible to record as a normal tape.

Next, when the first erasure control plate 4 is slid, the locking protrusion 7 engages with the center part of the third retaining groove 15, so that the erroneous erasure prevention detection hole 1 is opened and the tape detection hole is closed. 2 is in a closed state.

Therefore, erroneous erasure is prevented and operation as a normal tape is possible.

Next, when the second erasing control plate 5 is assembled into the guide groove 3, assuming that the stored tape is a chrome tape, the locking protrusion 9 is inserted into the first engagement groove 13. In order to engage with both sides, the detection hole 1 for preventing mistaken erasure is made into a closed state function.

However, since the second erasing control plate 5 is provided with an opening 16, the tape detection hole 2 is in an open state, and therefore, in this state, recording as a chrome tape is possible.

Then, when the second erasing control plate 5 is slid, the locking protrusion 9 does not engage with the second engagement groove 14 and the third engagement groove 15
In order to engage with both sides of the tape, both the erroneous erasure prevention detection hole 1 and the tape detection hole 2 are kept open to prevent erroneous erasure.
Enables operation as chrome tape.

Here, the first and second erasing control plates 4 and 5 are provided with convex portions 17 and 18 so that they can be easily slid.

In the above-described embodiment, locking protrusions are provided on both sides of the upper surface of the second restraint control plate 5, but only one of the locking protrusions may be provided.

As mentioned above, the device for preventing accidental erasure of cassette tapes according to the present invention allows the common use of a cassette case for normal tapes and special cassette tapes such as chrome tapes by selectively incorporating the erasure control board. Since the engaging grooves that engage with the locking protrusions on the erasing control plate are formed symmetrically in the pair of cassettes, it is possible to share the two upper and lower cassettes.

Therefore, it has a great effect in reducing the manufacturing cost of the cassette case, and furthermore, when assembling the cassette case, there is no need to select a cassette, which facilitates the assembly.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the cassette tape accidental erasure prevention device according to the present invention excluding the erasure control board, FIG. 2 is a perspective view of the first erasure control board, and FIG. 3 is the erasure control shown in FIG. A perspective view of the board, FIG. 4, shows the first erase control board inserted in FIG.
FIG. Explanation of main drawing numbers: 1...Detection claw to prevent accidental erasure 2
...Tape detection hole, 3...Guide groove, 4
...First erasing control board, 5... Second erasing control board, 7... Locking protrusion of first erasing control board, 9... ...Second erasure control plate locking protrusion, 13
, 14.15...first, second, and third retaining grooves,
16...Opening.

Claims (1)

[Scope of utility model registration request] Consisting of a pair of upper and lower cassette halves, a detection hole for preventing accidental erasure to prevent erasure due to erroneous operation and a tape detection hole for determining the type of stored tape are formed, and the upper part of both side exit holes is formed. a cassette case in which a guide groove is formed; and a first erase control that opens and closes the erroneous erasure prevention detection hole by sliding in the guide groove, and closes the tape detection hole in the open and closed positions. and a second erasure control plate having an opening and opening and closing the erroneous erasure prevention detection hole by sliding in the guide groove and opening and closing the tape detection hole in the open and closed positions. In the accidental erasure prevention device, the first and second erasure control plates are selectively assembled into the cassette case depending on the type of tape stored in the cassette case, the upper surface of the first erasure control plate a first locking protrusion is formed on at least one of the center or both sides of the second erasing control plate; a second locking protrusion is formed on at least one of the sides or the center of the upper surface of the second erasing control plate; Engagement grooves that engage with the first and second locking protrusions and hold the erase control plates in the open and closed positions, respectively, are formed symmetrically in the pair of cassette halves. A device to prevent accidental erasure of cassette tapes.