JPH05307824A - Disk drive device - Google Patents

Abstract

PURPOSE:To surely prevent the erroneous insertion of a case which have different specification by detecting the thickness of an inserted case and opening an insertion path only when the thickness is proper. CONSTITUTION:When the case of an magneto-optical disk having a proper thickness is inserted in a port 16, both micro-switches 24 and 26 turn on since movable pieces 24a and 26a are brought into contact with the front surface and the rear surface of the case. Thus, an electromagnetic plunger 32 is energized and a block 34 is ejected from an insertion path 22 and the insertion path 22 is opened. When a case having thinner thickness is erroneously inserted in the port 16, since both switches 24 and 26 don't turn on at the same time, the plunger 32 is not energized and the block 34 keeps the insertion path 22 close. Consequently, the case having different specification is surely inhibited from insertion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device in which a case accommodating a recording medium for a computer such as a magneto-optical disk is inserted from an insertion opening and used.

[0002]

2. Description of the Related Art A computer recording medium such as a magnetic disk or a magneto-optical disk is housed in a rectangular plastic case, and the case is inserted from one side into an insertion opening of a disk drive device. Writing and reading of data and programs are performed.

FIG. 8 is a view for explaining the dimensional standards of the case 1 of a magneto-optical disk having a diameter of 3, 5 inches and the case 2 of a magnetic disk. As is clear from this figure, both cases 1
And 2 have almost the same vertical and horizontal dimensions, and the dimensional standards are set so that the thicknesses are slightly different. That is, both cases
Both the cases 1 and 2 have a length of about 94 mm and a width of about 90 mm, and the case 1 for the magneto-optical disk has a thickness of about 6 mm, whereas the case 2 for the magnetic disk has a thickness of about 3 mm. There is. In addition, in FIG. 8, the front sides of the cases 1 and 2 are shown.
These cases 1 and 2 respectively have slidable shutters 3 and 4.

FIG. 9 is a view showing an insertion portion of a conventional magneto-optical disk and a drive device for a magnetic disk. In this figure, 5 is an insertion port, and 6 is an insertion path. Reference numeral 7 denotes a shutter, which has a habit of returning to a solid line position that closes the insertion port 5 around the fulcrum 8 by a torsion spring (not shown) or the like. Then, when one side of the case 1 or 2 is inserted into the insertion opening 5, the insertion side pushes the shutter 7 toward the insertion path 6 side as shown by an imaginary line.

The vertical width of the insertion slot 5 is slightly larger than 3 mm in the drive unit for inserting the case 2 for the magnetic disk, and slightly smaller than 6 mm in the drive unit for the case 1 for the magneto-optical disk. Made big.

[0006]

2. Description of the Related Art Since the case 2 of the magnetic disk is thinner than the case 1 of the magneto-optical disk, it may be erroneously inserted into the insertion opening of the drive unit of the magneto-optical disk. In this case, the drive device may be damaged or the inserted disc may be damaged.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and reliably prevents accidental insertion of cases of different standards having substantially the same (or small) external dimensions other than the thickness. It is an object of the present invention to provide a disk drive device that can be used.

[0008]

According to the present invention, an object of the present invention is to provide a rectangular case for accommodating a disk-shaped computer recording medium.
In a disk drive device that is inserted into the insertion opening from one side thereof, a thickness detection means for detecting the thickness of the case inserted in the insertion opening, and the case provided deeper in the insertion path than the thickness detection means. And an insertion path opening / closing means for opening the insertion path when the thickness of the space is proper and closing the insertion path when the thickness is improper.

Here, the thickness detecting means is formed by a pair of microswitches which operate by contacting both sides of the case, and the insertion path opening / closing means is formed by a block operated by an electromagnetic plunger, and is constituted by an electric circuit. You can Further, a block member is provided integrally with a pair of swing levers which are rotated by the case, and when the swing lever comes into contact with both surfaces of the case and rotates, the block member is withdrawn from the insertion path. It can be mechanically constructed.

[0010]

1 is a front view of a disk drive apparatus to which the present invention is applied, FIG. 2 is a sectional view taken along the line II--II, and FIG. 3 is a view showing the case insertion state.

The disk drive device 10 is provided with a drive device 12 for a magneto-optical disk and a drive device 14 for a magnetic disk, and its insertion ports 16 and 18 are opened in a front panel 20. The insertion opening 16 for the magneto-optical disk has a vertical width into which the case 1 (see the figure) is inserted, and the vertical width is larger than the insertion opening 18 for the magnetic disk.

An insertion path 22 is continuously provided horizontally at the insertion opening 16. At a position close to the insertion opening 16, a pair of micro switches 2 are provided so that the insertion path 22 is sandwiched from above and below.
4 and 26 are provided, and the movable pieces 24a and 26a of the respective microswitches 24 and 26 have a habit of returning in the direction of entering the insertion path 22. These movable pieces 24a, 26
a is a front surface (upper surface) and a back surface (lower surface) of the case 1 when the case 1 of the magneto-optical disk is inserted from the insertion opening 16.
And then exit the insertion path 22. At this time, the micro switches 24 and 26 are turned on. These micro switches 24 and 26 form a thickness detecting means.

Reference numeral 28 denotes an insertion path opening / closing means provided in the insertion path 22 deeper than the microswitches 24 and 26. The recess 30 is provided in the upper wall of the insertion path 22 and the electromagnetic plunger provided above the recess 30. 32 and this electromagnetic plunger 3
2 is fixed to the movable piece 32a, and the insertion path 22
And a block 34 that moves forward and backward.

The block 34 is urged by the coil spring 36 in the direction in which the block 34 projects toward the insertion path 22, and the insertion path 22 is closed at the advanced position shown in FIG. 2 as shown in FIG. In this embodiment, the block 34 has a horizontally long shape,
The blocks 34 and the recesses 30 may be of any shape as long as they can prevent foreign matter from being inserted, and the shapes can be freely determined.

The electromagnetic plunger 32 is excited when the microswitches 24 and 26 both detect the case 1 and is turned on, and causes the block 34 to exit from the insertion path 22.
Stored in the recess 30. At this time, the insertion path 22 opens,
The case 1 can be inserted. Note that this circuit includes, for example, a power supply, micro switches 24 and 26, and an electromagnetic plunger 32.
This can be achieved by connecting them in series so as to form a closed circuit with and.

In this embodiment, the insertion opening 16 shown in FIG.
Insert the case 1 of magneto-optical disk of appropriate thickness into
The upper and lower micro switches 24 and 26 are movable pieces 24a.
And 26a come into contact with the front (upper) surface and the back (lower) surface of the case 1 to be turned on. Therefore, the electromagnetic plunger 3
2 is excited and the block 34 exits the insertion path 22,
The insertion path 22 opens. Therefore, the case 1 can be inserted into the insertion path 22 as it is, as shown in FIG.

If the case 2 of the magnetic disk is inserted into the insertion slot 16 by mistake, the two microswitches 24 and 26 will not be turned on at the same time because the case 2 is thin. Therefore, the electromagnetic plunger 32 is not excited and the block 34 keeps the insertion path 22 closed.
Therefore, the wrong case 2 is prohibited from being inserted by the block 34.

FIG. 4 and FIG. 5 are side sectional views of the essential part of another embodiment, FIG. 4 showing the insertion passage 22 closed, and FIG. 5 showing the insertion passage 22 opened. In this embodiment, the insertion slot 1
Support points 50 and 52 are provided on upper and lower walls of the insertion path 22 close to 6, and swing levers 54 and 56 extending to the back of the insertion path 22 are supported at the support points 50 and 52, respectively. These rocking levers-5
Numerals 4 and 56 are urged by a torsion spring (not shown) in a direction to advance into the insertion path 22.

Both swing levers 54, 56 have slopes 54a, 56a which project into the insertion path 22 (FIG. 4) and gradually enter the insertion path 22 from the insertion port 16 side toward the back. In addition, the swing levers 54 and 56 have a fulcrum 5
Block members 58, 60 extending in a direction farther than 0, 52
Are integrally formed. These block members 58,
56 moves in or out of the insertion path 22 as the swing levers 54, 56 move in or out of the insertion path 22.

Therefore, the case 1 having an appropriate thickness is inserted into the insertion port 16
, The slopes 54a and 56a are pushed by the front edge of the case 1, and the swing levers 54 and 56 are withdrawn from the insertion path 22. Along with this, the block members 58 and 60 also withdraw from the insertion path 22. Therefore, the case 1 can be inserted deep into the insertion path 22 without being restricted by the block members 58 and 60.

If the thin case 2 is inserted by mistake, the rocking levers 54 and 56 cannot be completely withdrawn from the insertion path 22 at the same time. For this reason, at least one of the block members 58 or 60 remains in the insertion path 22, and the insertion of the case 2 is prohibited.

In the above embodiment, the thin case 2 is inserted into the thick case 1 by the thickness of the cases 1 and 2 by mistake.
To prevent it from being inserted. However, when the case 1 having the proper thickness is inserted into the insertion opening 16, there is a possibility that the front and the back may be mistaken. Therefore, it is desirable to add a function of preventing the case 1 from being inserted by mistake in the front and back directions in addition to the embodiments described in FIGS.

FIG. 6 is a perspective view showing an example of such a front / back mistake prevention mechanism, and FIG. 7 is an operation explanatory view thereof. This mechanism utilizes the fact that there is a notch 1b at the left corner of the front edge 1a of the case 1 (see FIG. 8).

In these drawings, reference numeral 70 designates a crankshaft, and its rotation axis 70a is located slightly inward of the left side edge of the insertion path 22 toward the insertion path 22 side. When the case 1 is correctly inserted with the front side facing up, the axis of rotation 70a overlaps the path of the cutout 1b.

The crankshaft 70 has a crankpin 72.
Only the crank webs 74, 74 and the rotary shaft 76 are outside the insertion passage 22. A lever 78 is attached to the crank pin 72, a crank web 74,
It is fixed in a direction substantially orthogonal to 74. This lever
78 rotates integrally with the crankshaft 70 and moves back and forth in the insertion path 22 substantially horizontally. Further, the crankshaft 70 has a habit of returning to the clockwise direction in FIG. 7, and the lever 78 is shown in FIG.
Return to position (A).

Therefore, when the case 1 is inserted inside out by turning the lever 78 into the insertion path 22 as shown in FIG. 7 (A), the right-angled corner 1c of the front edge of the case 1 is inserted into the crankshaft. It is located outside the rotation axis 70 a of 70. For this reason leading edge 1
Even if a hits the lever 78, no rotational moment is generated in the lever 78, and even if the case 1 is pushed further, the crankshaft 7
Insertion is prohibited by 0.

On the other hand, when the case 1 is properly inserted with the front side facing up as shown in FIG. 7B, the cutout portion 1b has a cutout portion 1b. Therefore, the cutout portion 1b of the front edge 1a is a lever 78. Do not touch. Therefore, the force that pushes the case 1 is the contact point 1 between the lever 78 and the leading edge 1a closest to the rotation axis 70a.
will act on d. As a result, as shown in FIG. 7B, the rotation moment acts on the crankshaft due to the distance L between the contact point 1d and the rotation axis 70a, and the crankshaft 70
Rotates counterclockwise in FIG. When the lever 78 exits from the insertion path 22, the case 1 remains in the insertion path 22.
Can be inserted deep inside.

In the above-mentioned embodiment, the thickness detecting means are microswitches 24 and 26 (FIGS. 1 to 3) and swing levers 54 and 56.
(FIGS. 4 and 5), various other structures are possible. For example, the thickness may be optically detected by using the reflected light from both surfaces of the case.

[0029]

As described above, according to the first aspect of the present invention, when the thickness of the case is detected and the case having the proper thickness is inserted, the insertion path is opened to insert the incorrect case. Since the insertion path is sometimes closed, there is no possibility of accidentally inserting a case having a different thickness, and damage to the drive device due to incorrect case insertion can be prevented.

The thickness of the case is detected by a pair of microswitches which operate by contacting both the front and back sides of the case,
The insertion path can be opened and closed by a block that moves forward and backward by an electromagnetic plunger (claim 2). In addition, a pair of rocking levers that move forward and backward into the insertion path are brought into contact with the front and back surfaces of the case to rotate, and the block members integrated with these rocking levers are all mechanically moved out of the insertion path. It is also possible to configure (claim 3).

[Brief description of drawings]

FIG. 1 is a front view of a disk drive device to which an embodiment of the present invention is applied.

FIG. 2 is a sectional view taken along line II-II.

FIG. 3 is a view showing the case insertion state.

FIG. 4 is a sectional view of another embodiment.

FIG. 5 is an explanatory diagram of its operation.

FIG. 6 is a perspective view of a front / back mistake prevention mechanism.

FIG. 7 is an explanatory diagram of its operation.

FIG. 8: Dimensional drawing of case

FIG. 9 is a sectional view showing a conventional disk drive device.

[Explanation of symbols]

 1 Case for magneto-optical disk 2 Case for magnetic disk 16 Insertion port 22 Insertion path 24, 26 Micro switch 32 as thickness detecting means 32 Electromagnetic plunger 34 Blocks 54, 56 Swing lever as thickness detecting means 58, 60 Block member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazunori Aiko 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. In a disk drive device in which a rectangular case for accommodating a disk-shaped computer recording medium is inserted into an insertion opening from one side thereof, the thickness of the case inserted into the insertion opening. And a thickness detecting means for detecting the thickness, and an insertion path is provided deeper in the insertion path than the thickness detecting means and opens the insertion path when the thickness of the case is appropriate and closes the insertion path when the thickness is incorrect. A disk drive device comprising: an insertion path opening / closing means. 2. The thickness detecting means is formed by a pair of microswitches which are turned on or off when a movable piece moving forward and backward in the insertion path comes into contact with the front surface and the back surface of a case having an appropriate thickness to turn on or off. 2. The disk drive device according to claim 1, wherein the path opening / closing means includes a block that advances and retracts into and from the insertion path, and an electromagnetic plunger that moves the block out of the insertion path when both of the microswitches are turned on or off. 3. The thickness detecting means is formed by a pair of rocking levers that are biased so as to enter the insertion path around a fulcrum on the insertion opening side and come into contact with the front and back surfaces of the case. 2. The disk drive according to claim 1, wherein the insertion path opening / closing means is formed of a block member which is provided integrally with these rocking levers and which moves back and forth into the insertion path as the rocking levers move back and forth into the insertion path. apparatus.