JPH0356921Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a recording/reproducing disk cassette having an opening into which a recording/reproducing head enters and a shutter plate for opening and closing the opening.

(Prior Art) A disk cassette that rotatably houses a magnetic disk for recording and reproducing is provided with an opening into which the recording and reproducing head of a recording and reproducing apparatus enters.When the disk cassette is loaded into the recording and reproducing apparatus,
The head can come into contact with the disk surface through the opening.

In order to protect the disk surface exposed from the head opening of the disk cassette, a shutter plate for opening and closing the head opening is slidably provided on the cassette. This shutter plate has a U-shaped cross section and is slidably provided so as to sandwich both sides of the cassette from one end side of the cassette. Both sides of the cassette on which the shutter plate is attached have a recess formed in the outer surface of the cassette with a depth equivalent to the thickness of the shutter plate, so that the shutter plate can slide in this recess. It's summery.

(Problem to be solved by the invention) In the case of a disk cassette in which recesses for sliding the shutter plate are formed on both sides of the cassette, the thickness of the cassette at the attachment part of the shutter plate is approximately twice the thickness of the shutter plate. This results in a problem with the rigidity of that part. Furthermore, since the shutter plate is provided on the outer surface of the disk cassette, there is a problem that the shutter plate may be opened inadvertently, increasing the chances that fingers or the like will touch the surface of the disk cassette.

(Means for solving the problem) A shutter plate recess that allows the shutter plate to slide on both sides of the disk cassette, and a name plate that is shallower than the recess that extends from both ends of the shutter plate recess in the shutter plate sliding direction. A shutter plate is slidably provided in the shutter plate recess, and a name plate is fixed to the name plate mounting recess in a state covering the shutter plate.

(Function) The name plate fixed to the name plate attachment recess of the disk cassette reinforces the area around the head opening, which has lower rigidity than other parts due to the shutter plate recess, and also prevents the shutter plate from being installed inadvertently. Prevent opening/closing.

(Example) The cassette 10 includes a pair of substantially square side plates 11,
12 are joined to each other, and a recess is formed on each inner surface of each side plate 11, 12 to rotatably accommodate a magnetic disk 14 having a disk hub 13 in the center. There is. Liners 15 and 16 (FIG. 3) are fixed to these recesses, respectively, and are arranged on both sides of the disk 14, respectively.

One side plate 11 has a hole 18 that exposes the center part 17 of the disk hub 13 to the outside, and the other side plate 12 has a hole 18 that exposes the center part 17 of the disk hub 13 to the outside. A hole 19 is formed in each case to expose the material to the outside.
The other end of the magnetic disk 14 is connected to a drive shaft of a recording/reproducing device, thereby being rotationally driven. A spherical protrusion 20 is provided on the center portion 17, and this protrusion comes into contact with an elastic plate on the side of the recording/reproducing apparatus when the disk cassette 10 is installed in the recording/reproducing apparatus.

One side plate 11 is provided with a head opening 21 for bringing a recording/reproducing head into contact with the magnetic disk 14, and the other side plate 12 is provided with a pad opening 22.

In FIG. 2, a recess 24 is provided around the head opening 21 for slidably mounting the shutter plate 23 in a direction transverse to the head opening 21.
Similarly, the side plate 12 also has a recess 2 having the same shape as the recess 24.
5 are formed respectively. Shutter plate 23
has a U-shaped cross section, and its bent portion is fixed to the slider 26. Shutter plate 23
is attached to the cassette so that the recesses 24 and 25 are sandwiched between them. With the shutter plate 23 mounted in this manner, the inner surface of the slider 26 comes into contact with the end surface 10a of the cassette. The shutter plate 23 is made wide enough to cover the head opening 21, and by moving the shutter plate 23 in the direction of arrow a, the head opening can be opened. The opening operation of the shutter plate 23 is performed when the slider 2
This is done by pulling a shutter plate opening/closing engager 27 formed at one end of the shutter plate 6 against a spring 28 by a moving element on the other side of the recording/reproducing apparatus.
The spring 28 has one end connected to the pin 29 of the slider 26.
The other ends are respectively locked to pins 30 on the cassette.

Name plate mounting recesses 33 are formed on both sides of the cassette 10 and extend from both ends 31 and 32 of the shutter plate recess 24 in the shutter plate sliding direction.
A name plate 34 having a U-shaped cross section is attached so as to sandwich the recess 33, and is firmly fixed with adhesive or the like. The name plate mounting recess 33 is set to a depth such that when the name plate 34 is mounted in the recess 33, the outer surface of the cassette and the name plate surface are substantially flush with each other. The name plate 34 has a window 35 at a portion that substantially coincides with the head opening 21 of the cassette when the name plate 34 is attached to the cassette, and an opening 36 for exposing the shutter plate opening/closing engager 27 to the outside.
are formed respectively.

(Effects) According to the present invention, by using the name plate provided on the disk cassette, the rigidity of the cassette, which has become weak due to the attachment of the shutter plate, is reinforced and the shutter plate is prevented from being opened inadvertently. can do.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a recording/reproducing disk cassette showing one embodiment of the present invention, FIG. The figure is a perspective view showing the magnetic disk and liner in the disk cassette. 10...Disc cassette, 21...Head opening, 23...Shutter plate, 24...Shutter plate recess, 27...Shutter plate opening/closing engager, 31, 32...Both ends, 33...Name plate attachment recessed part, 34...name plate, 35...
...window, 36...opening.

Claims (1)

[Scope of utility model registration request] A recording/reproducing disk cassette having a head opening into which a recording/reproducing head enters and a shutter plate for opening and closing this opening, a shutter plate recess formed on both sides of the cassette that allows the shutter plate to slide, and a shutter plate recess for allowing the shutter plate to slide. The shutter plate has a name plate attachment recess that is shallower than the recess extending from both ends of the plate recess in the sliding direction of the shutter plate, a window that substantially matches the opening, and an opening from which the shutter plate opening/closing engager projects. A disk cassette comprising a name plate fixed to the name plate mounting recess while covering the name plate.