JPS6235171Y2 - - 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.

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

As shown in FIGS. 1 and 2, a cassette mounting device 3 is provided on a chassis 2 of a recording/reproducing device 1. As shown in FIG. This cassette loading device 3 has a pair of left and right cassette insertion sections 5 and 6 having a U-shaped cross section, and the left and right sides of the disk cassette 4 are inserted into the pair of cassette insertion sections 5 and 6. . The pair of cassette insertion sections 5 and 6 can be moved up and down by a not-illustrated up and down movement mechanism of the cassette mounting device 3. A stopper 8 for regulating the insertion position of the disk cassette 4 is provided at the rear end of one of the cassette insertion sections 6.

Also provided on the chassis 2 are a flat brushless motor 11 and a magnetic head 12. A rotating stand 14 is integrally attached to the rotating shaft 13 of the brushless motor 11.
A drive pin 15 and a magnet 16 are respectively mounted on the top. On the other hand, the magnetic head 12 is attached to a head support base 17, and this head support base 17 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.

On the outside of the side wall 20 of one of the cassette insertion sections 5, a horizontal support plate section 21 is provided as shown in FIGS. 1 and 2. Support shafts 22 and 23 are installed on the upper surface of the support plate portion 21 in the front and rear. A first lever 24 constituting a first engaging member and a second lever 25 constituting a second engaging member are rotatably supported on the support shafts 23 and 22, respectively. The first lever 24 and the second lever 25
are constantly biased to rotate counterclockwise in FIG. 1 by tension springs 26 and 27, respectively. The tip end 28 of the first lever 24 projects into the cassette insertion section 5 through a slit 29 provided in the side wall 20. On the other hand, a support shaft 31 is integrally attached to the tip end 30 of the second lever 25.
A small lever 32, which together with the second lever 25 constitutes a second engagement member, is rotatably supported on the shaft 1.
This small lever 32 is constantly urged to rotate clockwise in FIG. Note that the second lever 25
A pair of stopper pins 35 and 36 for regulating the rotation range of the small lever 32 are implanted in the holder, and one end of the tension spring 33 is attached to one of the stopper pins 3.
It is locked at 5. Note that the first lever 24
normally comes into contact with the stopper portion 41 of the slider 40, as shown in FIG. 1, and is prevented from rotating counterclockwise in FIG. This slider 40 is for ejecting the disk cassette 4.
It moves in the insertion direction together with the disk cassette 4, and eject force is accumulated in an eject spring (not shown). On the other hand, the second lever 25 is always in contact with a stopper pin 42 implanted in the support plate portion 21 and is prevented from rotating counterclockwise in FIG. 1.

Next, the structure of the disk cassette 4 applied to the recording/reproducing apparatus 1 described above will be explained. This disk cassette 4 has a magnetic disk 46 rotatably housed in a flat cassette housing 45 made of synthetic resin. More specifically, as shown in FIG. 1, there is a core metal 47 in the center of the magnetic disk 46.
is attached, and this core metal 47 is rotatably fitted into a circular hole 48 formed on the lower surface of the cassette housing 45. Note that insertion holes 49 and 50 into which the rotating shaft 13 and drive pin 15 of the brushless motor 11 are inserted are provided on the lower surface of the core metal 47, respectively. One side 45 of the cassette housing 45
A head insertion hole 51 and a pad insertion hole 52 are provided on both the upper and lower surfaces of a, respectively. Then, when the disk cassette 4 is attached to the recording/reproducing device 1,
The magnetic head 12 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 12 comes into contact with the recording/reproducing surface of the magnetic disk 46.

The head insertion hole 51 and pad insertion hole 52
is always covered by a sliding lid 53 having a U-shaped cross section and sandwiching one side 45a of the cassette housing 45 from above and below. The sliding lid 53 is slidable in the directions of arrows e and f in FIG. 1 (the same direction as the insertion and ejection direction of the disk cassette 4). When the sliding lid 53 slides in the direction of arrow e in FIG. Consistent with 52 respectively,
These insertion holes 51 and 52 are open. Note that a convex portion 54 is formed on the side surface 53a of the sliding lid 53, with which the tip portions 28 and 34 of the first lever 24 and the small lever 32 can engage. Also, one side 45 of the cassette housing 45
A is provided with a recess 55 for detecting incorrect insertion.

The recording and reproducing apparatus 1 and the disk cassette 4 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 4 into the recording and reproducing apparatus 1. That is, when the disk cassette 4 is inserted into the cassette insertion sections 5 and 6 of the recording/reproducing apparatus 1 from the direction of arrow c in FIG.
is pressed to rotate the small lever 32 counterclockwise against the tension spring 33 as shown in FIG. When the convex portion 54 passes through the small lever 32 and comes into contact with the tip 28 of the first lever 24, the sliding lid 53 is relatively pressed by the tip 28 in the direction of arrow e in FIG. They slide relatively in the same direction. When the sliding lid 53 is opened as shown by the dashed line in FIG. In Fig. 4, it can now be rotated counterclockwise. Therefore, it becomes possible to further insert the disk cassette 4 from the position shown by the dashed line in FIG. lock is achieved.
That is, the disk cassette 4 is attached to the cassette mounting device 3.
The rotating shaft 13 and drive pin 15 of the brushless motor 11 are inserted into the insertion holes 49 and 50 of the core metal 47, respectively, and the magnetic head is inserted into the head insertion hole 51 and the pad insertion hole 52. 12 and pad are respectively inserted to perform recording and reproduction on the magnetic disk 46.

Next, the operation of opening the sliding lid 53 when ejecting the disk cassette 4 will be explained. First, when the eject lever (not shown) is operated in FIG. 4, the loading lock mentioned above is released and the disk cassette 4 is raised, and the disk cassette 4 is moved in the direction of arrow d in FIG. 4 by the return force of the slider 40. will be assisted by. Therefore, the disk cassette 4 is ejected in the direction of arrow d as shown in FIG. At this time, the first lever 24 is pressed by the erroneous insertion detection recess 55 and rotates clockwise in FIG. 4 against the tension spring 26. When the convex portion 54 of the sliding lid 53 comes into contact with the tip portion 34 of the small lever 32,
The sliding lid 53 is relatively pressed in the direction of arrow f in FIG. 4 and slides in the same direction. Then, the sliding lid 53 is closed as shown in FIG. Note that at this time, the slider 40 completes its backward movement, and the stopper portion 4
1 comes into contact with the tip 28 of the first lever 24.

Next, when the disk cassette 4 is pulled out by hand or the like in the direction of arrow d in FIG. 5, the second lever 25 rotates clockwise in FIG. 5 against the tension spring 27, and the small lever 32 It rotates clockwise in FIG. 5 while being pressed by the convex portion 54. Therefore, small lever 3
As shown in FIG. 6, the tip end 34 of the disc cassette 4 rides on the protrusion 54 relatively, and the disk cassette 4 can be pulled out in the direction of arrow d in FIG.

Although one embodiment of the present invention has been described above, the present invention is not limited to the structure shown in the above embodiment and can be modified in various ways.

As described above, the present invention makes the sliding lid of the disk cassette slidable along the insertion and ejection directions of the disk cassette, and the sliding lid is moved between the first and second positions by the insertion and ejection operations of the disk cassette. Since the lid is opened and closed using an engaging member, there is no need to manually open and close the sliding lid.
To quickly attach a disk cassette to a recording/reproducing device, and to surely prevent malfunctions such as attaching the disk cassette with the sliding cover closed. 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.

Furthermore, since the sliding lid is made to slide along the direction of insertion and ejection of the disk cassette, the insertion and ejection forces of the disk cassette can be applied directly to the sliding lid, allowing the opening and closing operations to be performed easily. It can be done smoothly.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a plan view showing the outline of a recording/reproducing device and a disk cassette, Fig. 2 is a front view as seen from the - line, and Figs. FIG. 4 is an explanatory diagram for explaining the opening operation of the sliding lid of the disk cassette, and FIGS. 5 and 6 are explanatory diagrams for explaining the closing operation of the sliding lid of the disk cassette. In addition, in the symbols used in the drawings, 4...disk cassette, 24...first lever (first engaging member), 25...second lever (second engaging member), 32...small lever (second engagement member), 46
. . . magnetic disk, 53 . . . sliding lid, 54 . . . convex portion.

Claims (1)

[Scope of utility model registration request] In a recording and reproducing apparatus that stores a disc-shaped recording medium and performs recording and reproduction by attaching a disk cassette having a sliding lid, the sliding lid is slid along the direction of insertion and ejection of the disk cassette into and out of the recording and reproducing apparatus. The recording/reproducing device has a first engaging member that engages with the sliding lid when the disc cassette is inserted, and a second engaging member that engages with the sliding lid when the disc cassette is ejected. 1. A sliding lid opening/closing device for a disk cassette in a recording/reproducing apparatus, characterized in that said sliding lid opening/closing device for a disk cassette in a recording/reproducing apparatus is characterized in that said sliding lid is opened and closed by said inserting and ejecting operations of said disk cassette.