JPS6138146Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording/reproducing disk cassette in which a flexible disk-shaped recording medium, such as a sheet-shaped magnetic disk, is rotatably housed in a housing.

Recently, recording and reproducing devices using disk cassettes have been put into practical use. A magnetic disk is rotatably housed in this disk cassette, and recording and/or reproduction is performed on the magnetic disk by a magnetic head provided in a main body of a recording/reproducing apparatus, so-called a disk recorder main body. For this purpose, the housing of the disk cassette is provided with an insertion hole through which the magnetic head is inserted, through which the magnetic head slides into contact with the magnetic disk in the cassette. .

However, if such an insertion hole is always left open, dust may enter the disk cassette through this insertion hole and adhere to the magnetic disk surface, or damage the magnetic disk surface exposed through this insertion hole. There is a problem that it is easy to get dirt and grime from your hands. Therefore, this type of disk cassette is usually provided with a sliding lid for opening and closing this insertion hole. However, since the conventional opening/closing lid is disposed on the outside of the cassette housing, it is often operated inadvertently, and there is also a risk that it may fall off from the housing. Furthermore, it did not look good in appearance.

The present invention has been devised in view of these problems, and it is an object of the present invention to provide a recording/reproducing disk cassette which overcomes the above-mentioned drawbacks by arranging an opening/closing lid inside the casing.

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.

As shown in FIGS. 1 to 4, the cassette housing 2 of the disk cassette 1 has an upper half 2 made of, for example, an injection molded product made of ABS resin containing an antistatic agent.
A and a lower half 2b, in which a magnetic disk 3 is rotatably housed.
The magnetic disk 3 is made of a thin disc-shaped polymer film with a thickness of, for example, about 0.04 mm, and a magnetic head provided on a disk recorder body (not shown) slides on the lower surface on which a magnetic layer is provided to perform recording/recording. It is designed to perform regeneration. A non-woven fabric 4 is placed between the magnetic disk 3 and the upper half 2a and lower half 2b of the cassette housing 2 as a cushioning material for protecting the magnetic disk. and the lower half 2b, respectively.

A long hole 5 extending in the radial direction of the magnetic disk 3 is provided in the lower half 2b of the cassette housing 2, and the magnetic head on the disk recorder main body side is inserted into the cassette through this long hole 5. ing. On the other hand, in the upper half 2a, there is a long hole 6 having almost the same shape as the long hole 5 in the lower half 2b.
A disk holding pad on the disk recorder main body side is inserted through this elongated hole 6, and the magnetic disk 3 is pressed against the magnetic head relatively by this disk holding pad. .

On the inner surfaces of the upper half 2a and the lower half 2b,
Guide recesses 7 and 8 are provided in the vicinity of the elongated holes 5 and 6, respectively, and an opening/closing lid 9 is slidably disposed in these guide recesses 7 and 8. The opening/closing lid 9 is constructed by, for example, bending a rectangular stainless steel plate along one side thereof into a substantially U-shaped cross section. As shown in FIG. 1, a pair of mutually opposing plate-shaped portions of the opening/closing lid 9 are each approximately rectangular in shape, and the length of the short side thereof is a guide recess 7 which also has a rectangular shape. , 8. On the other hand, the long sides of the guide recesses 7 and 8 are connected to the opening/closing lid 9.
The opening/closing lid 9 is fitted into the guide recesses 7 and 8 and slid in the direction of the long sides thereof.
A pair of elongated holes 10 and 11 with corresponding shapes are formed in each plate-shaped portion of the opening/closing lid 9 at positions that can overlap the elongated holes 5 and 6 of the cassette housing 2 so as to overlap with each other. The magnetic disk 3 is arranged between these two plate-shaped parts. On the upper surface 12 of this opening/closing lid 9, an operating protrusion 13 having an uneven top surface is integrally formed by press molding.
It is inserted through a rectangular hole 14 provided in the upper half 2a and exposed to the outside. In addition, a nonwoven fabric 17 is attached to the inner surfaces 15 and 16 of the pair of plate-like portions of the opening/closing lid 9 by thermal welding or the like as a cushioning material for protecting the magnetic disk. In addition, opening/closing lid 9 magnetic disk 3
In order to more reliably prevent contact with the opening/closing lid 9, a biasing force is applied to the opening/closing lid 9 in the direction of arrow A in FIG.

Next, the opening/closing operation of the opening/closing lid 9 will be explained with reference to FIGS. 3 and 4.

When the disk cassette 1 is attached to the disk recorder main body for recording or playback, as shown in FIG. 2 long hole 5
The elongated hole 11 of the opening/closing lid 9 and the elongated hole 6 and the elongated hole 10 are overlapped with each other. This allows the magnetic disk 3 to pass through these long holes 5, 11 and 6, 10.
Since the information is exposed to the outside, recording or reproduction can be performed using the magnetic head of the disc recorder main body.

On the other hand, when the disk cassette 1 is not in use, the opening/closing lid 9 is moved to the left by operating the operating protrusion 13, as shown in FIG. As a result, the long holes 11 and 10 of the opening/closing lid 9 are removed from the long holes 5 and 6 of the cassette housing 2, respectively, and these long holes 5 and 6 are closed by the opening/closing lid 9.

In this way, in this example, the cassette housing 2
The opening/closing operation of the opening/closing lid 9 is performed by sliding the operation protrusion 13 exposed on the top surface 18. At this time, the operation protrusion 13 is removed from the top surface 18 of the cassette housing 2. By not protruding too much, the opening/closing lid 9 can be effectively prevented from being operated inadvertently.

Further, in this example, the pair of plate-shaped parts of the opening/closing lid 9 are urged in the direction of arrow A in FIG. I'm trying to make it happen. Therefore,
The opening/closing lid 9 can be reliably prevented from inadvertently contacting the magnetic disk 3, and the opening/closing lid 9 can be moved by the frictional force between the plate-shaped portion of the opening/closing lid 9 and the inner surface of the cassette housing 2. Can be held in position.

Although the present invention has been described above with reference to one embodiment, the above-mentioned embodiment can be modified in various ways based on the technical idea of the present invention. For example, the opening/closing lid 9 may be made of a material other than stainless steel, such as aluminum,
Furthermore, it can also be constructed of synthetic resin or the like. Furthermore, if the rectangular operating protrusion 13 is made relatively large and a guide function is provided between the operating protrusion 13 and the rectangular hole 14 of the cassette housing 2, the inner surface of the cassette housing 2 can be The provided guide recesses 7 and 8 can also be omitted. Furthermore, a nonwoven fabric 17 provided between the opening/closing lid 9 and the magnetic disk 3
may be configured as an extension of the nonwoven fabric 4; however, in this case, the nonwoven fabric is not fixed to the opening/closing lid 9.

Furthermore, the present invention is also applicable to disk cassettes using recording methods other than magnetic recording.

As explained above, in the present invention, an opening provided in the housing for inserting the recording/reproducing means (for example, a magnetic head) is connected to an opening/closing lid slidably disposed inside the housing. It is configured to be opened and closed by. Therefore, it is possible to effectively prevent the opening/closing lid from being operated inadvertently, and there is no risk of the opening/closing lid falling off from the casing. Furthermore, since the opening/closing lid is housed inside the casing, the appearance of the disk cassette is improved.

Furthermore, in the present invention, the opening/closing lid is constructed from an elastic member that is bent and formed to have a substantially U-shaped cross section, and a pair of mutually opposing plate-like portions of the opening/closing lid are attached in a direction that separates them from each other. The plate-shaped portions are configured to be pressed against the inner surface of the housing by applying force. Therefore, it is possible to reliably prevent the opening/closing lid from inadvertently contacting the disk recording medium, and it is also possible to lock and hold the opening/closing lid at its moving position without using a special stopper. In addition, since the opening/closing lid according to the present invention is a sliding type, its structure is very simple.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Figure 1 is an exploded perspective view of the disk cassette, Figure 2 is a sectional view of the main parts taken along the - line in Figure 1, Figure 3 is a plan view of the main parts showing the opening/closing lid in the open state, and Figure 4 is the open/closed state. FIG. 4 is a plan view of the main parts similar to FIG. 3 showing the lid in a closed state. In addition, in the symbols used in the drawings, 2...cassette housing, 3...magnetic disk, 5...elongated hole, 9...
...opening/closing lid, 17...non-woven fabric.

Claims (1)

[Scope of utility model registration request] A housing, a disk-shaped recording medium rotatably housed in the housing, and a recording/reproducing means for recording to and/or reproducing from this disk-shaped recording medium are inserted. In a recording and reproducing disk cassette, which is provided with an opening provided in the casing and an opening/closing lid for opening and closing this opening, the elastic member is bent and formed to have a substantially U-shaped cross section. The opening/closing lid is configured such that the opening/closing lid is slidably disposed inside the housing, and the disc-shaped recording medium is disposed between a pair of mutually opposing plate-shaped portions of the opening/closing lid. and the pair of plate-shaped parts of the opening/closing lid are biased in a direction away from each other by the elastic biasing force thereof, and the opening/closing is performed with these plate-shaped parts being pressed against the inner surface of the casing. A disk cassette for recording and reproducing, characterized in that the lid is configured to slide.