JPH07192367A - Disk driving device - Google Patents

Abstract

PURPOSE:To surely prevent misinsertion of a disk cartridge. CONSTITUTION:Step parts 2d and 2e are formed on a bridge part 2c for reinforcing a notched part 2b of the disk cartridge 2, and a cartridge holder 3 for holding the disk cartridge 2 and a chassis 1 are provided with ribs 31 and 32 capable of being inserted into the step parts 2d and 2e, respectively. Then, a space A between the ribs 31 and 3 is narrowed to prevent misinsertion of the disk cartridge 2.

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 for rotatably driving a disk carrier rotatably attached to a disk cartridge, and more particularly to surely prevent erroneous insertion of the disk cartridge into the disk drive device. Disk drive device.

[0002]

2. Description of the Related Art FIG. 4 shows a schematic structure of an example of a disk drive device. In FIG. 4, a cartridge holder 3 having an auto-injection mechanism for automatically pulling the disc cartridge 2 to a predetermined mounting position is mounted on a rectangular chassis 1. A cartridge insertion / removal opening 4 is provided on the front surface of the cartridge holder 3, and a cutout portion 5 is formed on the rear surface. Further, a disk carrier 6 is pivotally mounted in the disk cartridge 2, and when the disk cartridge 2 is mounted at a predetermined position in the cartridge holder 3, it is rotated by a spindle motor (not shown) which is raised by an elevating mechanism. It is supposed to be done. Further, the cartridge holder 3 is provided with a shutter opening / closing mechanism 7 for opening / closing the shutter of the mounted disc cartridge 2. The shutter opening / closing mechanism is described in detail in the proposal previously filed by the applicant of the present application in Japanese Patent Application No. 5-11791.

On the other hand, on the chassis 1, a carriage 9 is moved by a linear motor 8 in the radial direction of the disk carrier 6.
The carriage 9 is provided with a disk carrier 6
To hold the optical head 10 and the magnetic head 11
Is attached. And the rotating disk carrier 6
Recording / reproduction of information is performed with respect to.

FIGS. 5 to 7 show an example of the structure of a conventional disc cartridge 2. In FIG. 5, the disc cartridge 2 is generally formed with an opening 2a that exposes a part of the disc carrier 6 in the radial direction, and the disc cartridge 2 has an opening on one side where the opening 2a is formed. A shutter 21 having a U-shaped cross section that opens and closes the portion 2a is movably mounted by holding both sides of the disc cartridge 2. The shutter 21 is formed with an opening 21a that can be aligned with the opening 2a of the disc cartridge 2, and the shutter 21 is urged to move in the direction of closing the opening 2a by a spring (not shown). In the disc cartridge 2 shown in FIG. 5, the opening 2a is only formed in a rectangular shape, and the head insertion port is not provided with a special notch. However, in order to reduce the thickness of the driving device, as shown in FIG. 6 and FIG. 7 as a top view and a bottom view, respectively, the opening 2a is extended to the outer periphery and the notch 2b is formed.
Need to be formed. In this case, the width of the shutter 21 may be formed to be slightly larger than the width of the cutout portion 2b, and the shutter 21 can be slid on one side of the bent portion of the shutter 21 into a groove portion (not shown) formed on the side surface of the disc cartridge 2. One end of the slider 22 to be engaged is screwed.

In the above structure, the bridging portion 2c connecting both sides of the open end of the cutout portion 2b is provided to increase the strength. The thickness of each of the bridge portion 2c and the slider 22 is equal to the thickness of the disk carrier 6, and when the shutter 21 is opened, the optical head 10 and the magnetic head 11 shown in FIG. It can be moved along both sides of 6. Reference numeral 23 shown in FIG. 7 is a write protector as a display means for displaying whether or not new information may be recorded on the disc carrier 6.

On the other hand, the disk drive device is provided with a means for preventing erroneous insertion of the disk cartridge 2. FIG. 8 shows a configuration of an example of a conventional erroneous insertion prevention structure. In FIG. 8, an erroneous insertion preventing rib 31 that protrudes downward is provided on the inner side of the cutout portion 5 of the cartridge holder 3 shown in FIG. An erroneous insertion prevention rib 32 is provided on the chassis 1 side so as to face the rib 31 and project upward. The distance A between the ribs 31 and 32 is slightly larger than the thickness of the disc carrier 6, smaller than the thickness B of the disc cartridge 2, and slightly larger than the thickness c of the bridging portion 2c of the disc cartridge 2. With such a structure, erroneous insertion of the disc cartridges 2 having different thicknesses is prevented.

[0007]

However, the conventional erroneous insertion prevention structure constructed as described above has a problem that erroneous insertion prevention cannot be reliably performed due to a dimensional error in each part. For example, in the case of a 3.5 inch floppy disk, the thickness of the disk carrier 6 is 3.3 m as shown in FIG.
m, the thickness C of the bridge portion 2c of the disc cartridge 2 is
It is 1.8 mm. Here, there is a tolerance in the thickness of the disk carrier 6, and it is 3.2 mm in the thinnest case. On the other hand, there is a tolerance in the bridging portion 2c as well, and it is 2.2 mm when it is thickest. Further, in order for the disc cartridge 2 to be smoothly inserted into the cartridge holder 3, a gap is required between the thickness B of the disc cartridge 2 and the inner thickness D of the cartridge holder 3, and the gap is 0.5 mm at maximum. Become. Moreover, the ribs 31 and 32 respectively provided on the cartridge holder 3 and the chassis 1 also have tolerances, and it has been difficult to reliably prevent erroneous insertion due to changes in the distance A between them.

That is, when the thickness of the disk carrier 6 is T as shown in FIG. 8, the distance A between the ribs 31 and 32 is T.
If it is smaller, even if the disc cartridge 2 is inserted into the disc holder 3, the disc carrier 6 does not have the ribs 31 and 3.
The disk cartridge 2 does not enter the home position because it interferes with the disk cartridge 2. In order to solve this problem, the interval A must be made larger than the thickness T of the disk carrier 6 in consideration of the above-mentioned tolerances of each part. As a result, another type of disk cartridge in which the disk carrier 6 having a large thickness T is pivotally attached can be inserted, and there is a problem that erroneous insertion cannot be prevented.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a disk drive device capable of reliably preventing erroneous insertion of a similar disk cartridge.

[0010]

A disk drive apparatus according to a first aspect of the present invention has a disk carrier 6 which is rotatably pivotally mounted, and a cutout portion 2b for allowing the heads 10 and 11 to be inserted therethrough and a thin bridge. A disc cartridge 2 provided with a bridging portion 2c which is a guide rib, a cartridge holder 3 as a holding member for holding the disc cartridge 2 in a fixed position, and a cartridge holder 3 and a chassis 1 side which is the apparatus main body side, respectively. A disk drive device comprising a pair of ribs 31 and 32 as engagement members for preventing erroneous insertion of the disk cartridge 2, wherein the ribs 31 and 32 can be protruded into the cutout portion 2b to the left and right, respectively.
A pair of left and right step portions 2d and 2e through which the ribs 31 and 32 can be respectively inserted are formed in the bridging portion 2c while the pair is provided.

[0011]

In the disk drive device having the above structure, the step portions 2d and 2e are formed in the bridging portion 2c, and the upper and lower ribs 31 and 32 can be inserted into the respective concave portions, so that the ribs 31 and 32 are separated from each other. The interval A can be reduced. Therefore, erroneous insertion of a similar cartridge can be prevented even if there is a dimensional error in each part.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk drive device of the present invention will be described below with reference to the drawings.

1 and 2 show the configuration of an embodiment of the present invention. In these figures, parts corresponding to the parts of the conventional example shown in FIGS. 4 to 7 are designated by the same reference numerals, and description thereof will be omitted as appropriate.

In FIG. 1A, step portions 2d and 2e are formed at both ends of a bridging portion 2c which connects the front edge of the cutout portion 2b of the disc cartridge 2, and one step portion 2d has a concave upper surface. The lower surface of the other step portion 2e has a concave shape. On the other hand, ribs 31 and 32 are provided on the cartridge holder 3 side and the chassis 1 side, respectively, at positions facing the concave portions of the stepped portions 2d and 2e.

FIG. 2 shows the positions of the ribs 31, 32. A rib 31 bent downward is provided on one side of the opening end of the notch 5 of the cartridge holder 3 that holds the disc cartridge 2. Further, a spindle motor 42 is attached to the chassis 1 so as to be capable of moving up and down via an elevating plate 41, and an ascending end of the elevating plate 41 is restricted by a limiting plate 43 fixed to the chassis 1. When the disc cartridge 2 to which the disc carrier 6 is pivotally attached is held at a predetermined position in the cartridge holder 3, the elevating plate 41 is raised and the drive shaft of the spindle motor 42 is fitted into the center hole of the disc carrier 6. The disc carrier 6 is driven to rotate by the spindle motor 42. Further, the rib 32 is provided so as to project on the limiting plate 43. Then, when the disc cartridge 2 is inserted into the cartridge holder 3, the ribs 31 and 32 are fitted into the recesses of the step portions 2d and 2e formed in the bridging portion 2c of the disc cartridge 2, respectively.

Next, the operation of this embodiment will be described with reference to FIG. Note that, in FIG. 3, portions corresponding to those of the conventional example shown in FIG. 8 are denoted by the same reference numerals, and description thereof will be omitted as appropriate. In FIG. 3, the ribs 31 and 32 are fitted in the recesses of the step portions 2d and 2e formed at both ends of the bridging portion 2c of the disc cartridge 2, respectively.
It is possible to make the distance A between 1 and 32 smaller than the thickness T of the disk carrier 6 and the thickness C of the bridging portion 2c. Therefore, even if a disc cartridge in which the step portions 2d and 2e are not formed in the bridging portion 2c is inserted into the cartridge holder 3, the bridging portion 2c interferes with the ribs 31 and 32,
It cannot be inserted in place. Even if there is a tolerance in the thickness C of the bridging portion 2c, the distance A between the ribs 31 and 32 is made sufficiently small, and the depth of the concave portions of the step portions 2d and 2e is made deep enough so that the ribs 31 and 32 do not interfere with each other. As a result, the correct disk cartridge 2 can be inserted, and erroneous insertion of a similar disk cartridge can be reliably prevented.

[0017]

As described above, according to the disk drive apparatus of the present invention, since the step portion is provided on the bridging guide rib provided on the disk cartridge, it is possible to reliably prevent erroneous insertion of a similar disk cartridge. it can.

[Brief description of drawings]

FIG. 1 is a front view showing an erroneous insertion prevention structure of a disk cartridge according to an embodiment of a disk drive device of the present invention.

FIG. 2 is an exploded perspective view showing an arrangement of ribs engaging with the bridging portion of FIG.

FIG. 3 is a perspective view showing dimensions of each part of FIG.

FIG. 4 is a perspective view showing a configuration of a main part of an example of a disk drive device.

FIG. 5 is a perspective view showing the configuration of an example of a conventional disc cartridge.

FIG. 6 is a top perspective view showing the configuration of another example of a conventional disc cartridge.

FIG. 7 is a bottom perspective view of FIG.

FIG. 8 is a perspective view showing the configuration of an example of a conventional erroneous insertion prevention structure for a disc cartridge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 chassis 2 disk cartridge 2b notch 2c bridging part 2d, 2e step 3 cartridge holder (holding member) 6 disk carrier 10, 11 head 31, 32 rib (engaging member)

Claims (1)

[Claims] 1. A disk cartridge having a disk carrier rotatably pivotally mounted and a front surface provided with a cutout portion and a thin bridging guide rib through which a head can be inserted, and a holding member for holding the disk cartridge in a fixed position. A disk drive device, comprising: a member; and a protrusion that is provided on each of the holding member and the device main body so as to project inward, and that prevents erroneous insertion of the disk cartridge, wherein the engaging member is in each of the notches. A pair of left and right stepped portions through which the engaging members can be inserted respectively are formed in the bridge guide ribs so as to be projectable.