JPS6215895Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sliding lid opening/closing device for a disk cassette in a recording/reproducing apparatus.

A disk cassette that rotatably stores a disk-shaped recording medium (hereinafter referred to as a "disk") such as a magnetic sheet has a magnetic head insertion hole and a pad insertion hole covered with a sliding lid that can be opened and closed. be. This is to prevent dust from entering through the insertion hole and adhering to the recording/reproducing surface of the disk, or from accidentally touching the recording/reproducing surface with your hand or the like and damaging it. However, such a disk cassette with a sliding lid has the trouble of having to manually open and close the sliding lid each time before inserting the cassette into the cassette holder of the recording/reproducing apparatus and after ejecting the cassette. Furthermore, since the sliding cover is opened and closed manually, there is a risk that a hand or the like may accidentally touch the recording/reproducing surface of the disk and damage it.

The present invention was devised to solve the above-mentioned problems, and its purpose is to enable the sliding lid to be opened and closed automatically in conjunction with the insertion and ejection operations of the disk cassette. There is a particular thing.

Embodiments of the present invention will be described below based on the drawings.

First, the first embodiment will be described. As shown in FIGS. 1 and 2, a cassette holder 3 of a cassette loading device is provided on a chassis 2 of a recording/reproducing device 1. The cassette holder 3 consists of an upper plate part 4 and a pair of U-shaped cassette insertion parts 5 and 6 provided on both left and right sides of the upper plate part 4. The left and right sides of the disk cassette 7 are inserted into the slot. The cassette holder 3 can be moved up and down by a vertical movement mechanism of a cassette mounting device (not shown), so that the disk cassette 7 can be set from a temporary mounting position to a regular mounting position of the recording/reproducing apparatus. Note that a pair of cassette insertion sections 5,
A pair of stopper portions 8 and 9 for regulating the insertion position of the disk cassette 7 are provided at the rear end of the disk cassette 6 .

Also provided on the chassis 2 are a flat brushless motor 12 and a magnetic head 13. A rotating stand 15 is integrally attached to the rotating shaft 14 of the brushless motor 12.
A drive pin 16 and a magnet 17 are mounted on the drive pin 5. On the other hand, the magnetic head 13 is attached to a head support base 18, and this head support base 18 is intermittently reciprocated in the directions of arrows a and b in FIG. 1 by a feed screw and a step motor (not shown). It's becoming like that.

A fulcrum pin 21 is implanted in one side of the upper plate portion 4 of the cassette holder 3, as shown in FIGS. 1 and 2. As shown in FIGS. One end of an arm plate 22 extending in the left-right direction is rotatably supported on this fulcrum pin 21, and this arm plate 22 is always urged to rotate counterclockwise in FIG. 1 by a tension spring 23. ing. In addition,
A stopper pin 24 is implanted in the upper plate portion 4, and the arm plate 22 is normally in contact with the stopper pin 24 to prevent rotation in the counterclockwise direction in FIG.

Pins 27 and 28 are provided at the tip of the arm plate 22.
One end portions of the two rotating levers 25 and 26 are respectively attached so as to be freely rotatable in the horizontal direction. Note that the pin 28 is inserted into the elongated hole 11,
It is designed to be able to move slightly in the front and rear directions. These rotating levers 25 and 26 are parallel to each other,
The tip ends of the rotating levers 25 and 26 are connected to each other by a connecting plate 29 parallel to the arm plate 22. Specifically, the left and right ends of the connecting plate 29 and the tips of the rotating levers 25 and 26 are connected to the pins 19 and 2.
The arm plates 22 are pivotally connected to each other at 0.
, the rotating levers 25 and 26 and the connecting plate 29
A parallel quadruple link is constructed. Therefore,
The rotating levers 25 and 26 are configured to maintain a parallel state with each other and to be able to rotate twice. Rotating lever 25
and 26 are also provided with engagement pins 30 and 3.
1 is implanted, and the lower ends of these engaging pins 30 and 31 protrude below the upper plate part 4 from a notch 32 formed in the upper plate part 4. and engagement pin 3
The lower end of 0, 31 is a disk cassette 7 which will be described later.
They form pressing portions 30a and 31a that press the convex portion 34 of the sliding lid 33 from the sides thereof. Note that one end of a tension spring 35 is fixed to the tip of the rotating lever 25, and the other end of this tension spring 35 is fixed to a protrusion 36 provided on the upper plate portion 4. Therefore, the engagement pins 30, 31 are always in contact with the straight edge portion 37 of the cutout portion 32.

Next, the structure of the disk cassette 7 applied to the recording/reproducing apparatus 1 described above will be explained.

This disk cassette 7 has magnetic disks 4 in a flat cassette housing 45 made of synthetic resin.
6 is rotatably stored. Specifically, as shown in FIG. 1, a core metal 47 is attached to the center of the magnetic disk 46.
is a circular hole 4 formed on the bottom surface of the cassette housing 45.
8 and is rotatably fitted in the inside. In addition, the core metal 47
The rotating shaft 1 of the brushless motor 12 is located on the bottom surface of the brushless motor 12.
4 and drive pin 16 are respectively provided. A head insertion hole 51 and a pad insertion hole 52 are provided on both upper and lower surfaces of the front side portion 45a of the cassette housing 45, respectively. When the disk cassette 7 is installed in the recording and reproducing apparatus 1, the magnetic head 13 is inserted into the head insertion hole 51, and a pad (not shown) is inserted into the pad insertion hole 52, so that the magnetic head 13 can record and reproduce the magnetic disk 46. It comes into contact with the surface.

The head insertion hole 51 and pad insertion hole 52
is always covered by a sliding lid 33 having a U-shaped cross section and sandwiching the front side 45a of the cassette housing 45 from above and below. This sliding lid 33 is slidable in the directions of arrows c and d in FIG. 1 (directions perpendicular to the insertion and ejection directions of the disk cassette 7). When the sliding lid 33 slides in the direction of arrow c in FIG. The insertion holes 51 and 52 are opened in alignment with the holes 52, respectively. Note that the side surface 33 of this sliding lid 33
Pressing parts 30a and 31 of the pins 30 and 31 are shown in a.
A convex portion 34 that can be fitted is formed between the cylindrical portion and the portion a.

The recording and reproducing apparatus 1 and the disk cassette 7 are constructed as described above, and the sliding lid 33 is automatically opened and closed in conjunction with the insertion and ejection of the disk cassette 7 into and out of the recording and reproducing apparatus 1. That is, when the disk cassette 7 is inserted into the cassette insertion sections 5 and 6 of the cassette holder 3 from the direction of the arrow e in FIG.
First, the convex portion 34 of the sliding lid 33 is fitted between the pressing portions 30a and 31a of the pins 30 and 31. When the disk cassette 7 is further inserted, the pressing portions 30a and 31a are pressed in the direction of arrow e by the side surface 33a of the sliding lid 33 and the front end 45b of the cassette housing 45, respectively, as shown in FIG. Therefore, the pivot levers 25, 26 are pivoted counterclockwise in FIG. 3 against the tension spring 35. Therefore, the convex portion 34 of the sliding lid 33 is pressed in the direction of arrow c in FIG.
slide in the same direction. Then, the sliding lid 33 opens as shown by the dashed line in FIG. Further insertion can be made from the position shown to the position shown by the solid line. Then, the loading lock of the disk cassette 7 to the recording/reproducing apparatus is performed by the moving distance l of the disk cassette 7 at this time. That is, the cassette holder 3 is lowered by the vertical movement mechanism of the cassette mounting device as shown in FIG.
6 is the insertion hole 49 of the core bar 47 of the disk cassette 7
and 50, and the magnetic head 13 and pad are inserted into the head insertion hole 51 and the pad insertion hole 52, respectively, to perform recording and reproduction on the magnetic disk 46. At this time, the arm plate 22 rotates slightly clockwise against the tension spring 23, as shown in FIG.

On the other hand, the ejecting operation of the disk cassette 7 is performed by operating an ejection lever (not shown) in FIG. 4, and the closing operation of the sliding lid 33 is performed in the exact opposite manner to the case described above.

Next, a second embodiment of the present invention will be described based on FIGS. 6 to 8. This example is shown in FIGS. 6 and 7.
As shown in the figure, one rotating lever 25 in the first embodiment is attached to a pin 57 at the rear end of the cassette holder 3.
It is attached so that it can rotate freely. A tension spring 59 is installed between the slider 58 for ejecting the disk cassette 7 and the rotating lever 25.
It has been established. The slider 58 is provided with a protrusion 71 against which the front end surface of the disk cassette 7 comes into contact, and the disk cassette 7 is ejected by the protrusion 71 when the slider 58 moves back. Therefore, the return force of the slider 58 acts on the rotating lever 25 via the tension spring 59, and the rotating lever 25 can be rotated counterclockwise in FIG. 7 reliably and speedily. Therefore, there is no possibility of opening/closing errors such as ejecting the disk cassette 7 with the sliding lid open. In addition, in Fig. 6 and Fig. 7, 60 to 62
are tension springs for respectively moving the arm plate 22, the rotating lever 26, and the slider 58 back. Reference numeral 63 is a cassette lock lever attached to the slider 58, and a claw portion 63a thereof is adapted to engage with a recess 64 of the disk cassette 7. Note that 65 is a lock release piece provided on the cassette holder 3, etc.
When the slider 58 moves backward, the engagement between the claw part 63a and the recessed part 64 is released, as shown in FIG.

Next, a third embodiment of the present invention will be described based on FIG. 9. In this embodiment, a rotary lever 39 is rotatably attached to the upper plate portion 4 of the cassette holder 3 with a pin 40. And this rotating lever 39
An engaging pin 41 attached to the tip of the sliding lid 33 engages with a recess 42 formed in the sliding lid 33. Therefore, when the disk cassette 7 is inserted in the direction of arrow e in FIG.
Slide in the direction to open the lid. In FIG. 9, reference numeral 43 designates a tension spring for backward movement of the rotary lever 39.

As described above, the present invention is designed to automatically open and close the sliding lid of the disk cassette using a rotary lever that rotates in conjunction with the insertion and ejection operations of the disk cassette. There is no need for the trouble of manually opening and closing the sliding lid, the disk cassette can be quickly installed in the recording/reproducing device, and erroneous operation such as installing the disk cassette with the sliding lid closed can be reliably prevented.
Furthermore, when the disk cassette is removed from the recording/playback device, the sliding lid is always closed, so there is a risk that your hands, etc. may touch the recording/playback surface of the disk-shaped recording medium and accidentally damage it. Not at all.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and
1 to 5 show a first embodiment, FIGS. 6 to 8 show a second embodiment, and FIG. 9 shows a third embodiment. Figure 2 is a front view as seen from the - line arrow, Figure 3 is an explanatory diagram for explaining the opening operation of the sliding lid, and Figure 4 shows the state when the disk cassette is locked for loading. FIG. 5 is a rear view as seen from the - line arrow of the above, FIG. 6 is a plan view schematically showing the recording/reproducing apparatus according to the second embodiment, and FIG. FIG. 8 is an explanatory diagram showing the state in which the cassette lock lever is unlocked, and FIG. 9 is a plan view schematically showing the recording/reproducing apparatus according to the third embodiment. . Also, in the codes used in the drawings, 25, 2
6... Rotating lever, 30, 31, 41... Engaging pin, 33... Sliding lid, 34... Convex portion, 42... Concave portion, 46... Magnetic disk.

Claims (1)

[Scope of utility model registration request] A rotary lever is provided that operates in conjunction with the insertion and ejection of a disk cassette that stores a disk-shaped recording medium and has a sliding lid, and an engaging portion that engages with a tip of the rotary lever is provided on the sliding lid. A sliding lid opening/closing device for a disk cassette in a recording/reproducing apparatus, characterized in that the sliding lid is opened and closed in conjunction with the insertion and ejection operations of the disk cassette.