JP2548087Y2 - Disk drive - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive for recording or reproducing a signal using a flexible magnetic disk cartridge (floppy disk) or the like, and more particularly, to a disk cartridge which has been deformed. The present invention relates to a disk drive device that can be used even with a disk drive.

[0002]

2. Description of the Related Art 3.5-inch floppy disk drives are used in various fields such as personal computers and word processors. As shown in FIGS. 5 and 6, a magnetic disk cartridge 1 generally called a micro floppy disk used in this disk drive device is constructed by housing a magnetic disk 2 having a diameter of 86 mm in a rigid synthetic resin case 3. It is configured. Openings 6 and 7 for inserting the head are provided on both the front surface 4 and the rear surface 5 of the case 3.
Is closed by In the case of the single-sided type, the head is inserted into only one of the openings 6 and 7, and the pad is inserted into the other. The shutter 8 is formed in a U shape so as to extend from the front surface 4 to the back surface 5 and slides along one side surface of the race 3. The magnetic disk 2 comprises a magnetic sheet portion 2a and a metallic hub 2b mounted at the center. The hub 2b exposed from the opening 10 in the back surface 5 of the case 3 is provided with a spindle insertion hole 2c and a positioning and drive pin insertion hole 2d. As shown in FIG. 6, two concave portions 9a and 9b for positioning are provided on the back surface 5 of the case 3. The shutter 8 has windows 8a and 8b on the front and back, respectively. These windows 8a, 8b coincide with the openings 6, 7 of the case when the shutter 8 is opened.

The cartridge 1 as described above is disclosed in, for example, Japanese Utility Model Application No. 60-103322 (Japanese Utility Model Application Laid-Open No. 62-11259).
No.) As disclosed in the specification and the drawings, it is held on a holder and loaded on a disk turntable. At this time,
The position of the cartridge 1 in the thickness direction of the cartridge 1 is determined by positioning pins or projections provided on the frame of the disk drive. The above publication discloses means for correcting the deformation of the shutter 8 in order to prevent the deformation of the shutter 8 from hindering good contact of the magnetic head with the disk 2.

[0004]

By the way, the cartridge 1 is generally formed of a synthetic resin, and the rear surface 5 is provided with an opening 10 for exposing the hub 2b. The portion near the opening 10 in the case 3 is more likely to be deformed such as warped than other portions. When the disk drive is made extremely thin, some deformation of the case 3 also hinders the thinning. That is, it is necessary to bring the disk drive motor extremely close to the back surface 5 of the cartridge 1 in order to achieve a reduction in thickness. At this time, if the gap between the motor and the cartridge 1 is determined by largely considering the amount of deformation of the case 3, the above gap is inevitably increased. Also open and close
The freely formed shutter 8 is also easily deformed. Also
However, if the shutter 8 is significantly deformed,
Unnecessary contact with other parts and may damage other parts or the shutter.
There is it. Provide sufficient space near shutter 8
If this happens, the problem of contact with other parts will not occur, but inevitably
The disk drive becomes thicker and hinders this thinning.
Although the floppy disk drive has been described above, there is a similar problem in another disk drive using a cartridge of a similar type.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a disk drive capable of recording or reproducing a signal while suppressing deformation of one or both of a case and a shutter of a disk cartridge.

[0006]

The present invention to achieve the above object will be described with reference to the drawings showing the embodiments. The case 3 accommodates the recording medium disk 2 and the surface 4 of the case 3. A pair of head insertion openings 6 and 7 for contacting the magnetic head with the disk 2 are provided on the back surface 5, and an opening 10 for exposing the hub 2 b at the center of the disk is provided on the back surface 5 of the case 3. A shutter 8 is provided and selectively covers the head insertion openings 6 and 7. The shutter 8 is engaged with the case 3 so as to slide linearly along one side surface of the case 3. The shutter 8 is formed in a U-shape so as to extend from the front surface 4 to the rear surface 5 of the case 3, and the shutter 8 is provided with information using a disk cartridge 1 provided with head insertion windows 8a and 8b. A device for recording or reproducing signals, a disk rotating mechanism having a rotating table 17 engaged with the hub 2b of the disk 2 to rotate the disk 2, and mounting the disk 2 on the rotating table 17. And a cartridge loading means for loading the cartridge 1 as described above.
The cartridge in the peripheral region of the back surface 5 of the case 3 of the die 1
Multiple cases for determining the position of the edge 1 in the thickness direction
The peripheral edge positioning projections 23 to 26 and the case 3
The heads of the head insertion openings 6 and 7 and the shutter 8
The above-mentioned opening which is opened so that the insertion windows 8a and 8b coincide with each other.
The head on the back surface 5 side of the case 3 of the shutter 8
The position in the thickness direction of the peripheral area of the window 8b for insertion
Shutter Position Limiting Protrusions 27-30
And the shutter position limiting projection.
The protrusions 27 to 30 are the protrusions 23 to 2 for positioning the periphery of the case.
6 is formed slightly lower than
It relates to a disk drive . In addition, claim 2
As shown in FIG.
Providing slightly lower hub-neighboring position limiting projections 31-33
be able to. In addition, as set forth in claim 3, the case periphery.
Edge positioning projections 27 to 30 and hub vicinity position limiting projection
Both 31 to 33 can be provided.

[0007]

[Action and Effect of invention] In the invention of claim 1, Quai
For determining the position of the peripheral area of the back surface 5 of the base 3
Case peripheral projections 23-26 and shutter 8
To limit the position of the area around the head insertion window 8b
Are provided with a plurality of shutter position limiting projections 27 to 30;
Shutter position limiting projections 27 to 30 are positioned around the case.
Formed slightly lower than the female projections 23-6.
In addition to maintaining the peripheral edge at a predetermined height,
Deformation of the shutter 8 beyond the allowable range
It is possible to limit at first 27 to 30. If the present invention
Shutter position limiting projections 27 to 30 are not provided
In this state, if the shutter 8 is significantly deformed,
This unnecessarily comes into contact with other parts, and the other parts or shutter 8
May be damaged. In contrast, the system according to the present invention
In the case where protrusions 27 to 30 for restricting the position of the shutter are provided.
The deformation of the shutter 8 is corrected by the protrusions 27 to 30
Therefore, the above-described problem does not occur. Note that
If sufficient space is provided near the shutter 8, other parts
The problem of contact with the disc does not occur, but the disc is inevitably thick.
And hinder this thinning. In the invention of claim 2
In addition to the case peripheral positioning projections 23 to 26,
Near the opening 10 for exposing the hub 2b from the base 23.
Position limiting protrusion near hub to limit position of para area
Since the case 31 to 33 is provided, the periphery of the case is positioned at a predetermined height.
And the position of the case 3 near the hub
The protrusions 31 to 3 for restricting the position in the vicinity of the hub can be deformed beyond the allowable range.
3 can be limited. If near the hub according to the invention
When the side position limiting projections 31 to 33 are not provided
In this case, the area near the hub 2b of the case 3 is significantly deformed.
This makes contact with other parts of the motor, such as the rotor,
The case 3 or other parts may be damaged. to this
On the other hand, protrusions 31 to 33 for restricting the position near the hub according to the present invention.
The above problem does not occur in the case where is provided. What
If sufficient space is provided in the area near the hub, other parts
The problem of contact with the minute does not occur, but
The driving device becomes thick, which hinders the reduction in thickness. Claim 3
According to the invention, the case peripheral projections 23 to 26
Alternatively, shut motor position limiting projection 27 to 30 and Bab vicinity
The position limiting projections 31 to 33 are provided, so that
It is possible to obtain both the effect of the plan and the effect of the invention of claim 2.
it can.

[0008]

1 to 6, a description will be given of a floppy disk drive according to an embodiment of the present invention.

As shown in FIG. 2, this floppy disk drive has one (lower) magnetic head 11 and the other (upper) magnetic head 12 disposed opposite to the magnetic head 11. Recording or reproduction is performed by bringing the head 11 into contact with one surface of the disk 2 and recording or reproduction is performed by bringing the other magnetic head 12 into contact with the other surface of the disk 2. One magnetic head 11 is supported by a carriage 13, and the other magnetic head 12 is supported by a head support arm 14. The head support arm 14 is rotatably attached to the carriage 13 by a spring hinge including a leaf spring 15, and the leaf spring 15 and a torsion spring (not shown).
As a result, a biasing force in the direction of bringing the magnetic head 12 into contact with the disk 2 is received. A mechanism is provided for rotating the arm 14 counterclockwise in FIG. 2 against the biasing force of the spring 15 when the cartridge 1 is attached to or detached from the disk drive.

The head carriage 13 is a well-known head moving mechanism (not shown) comprising a stepping motor, a lead screw for converting rotary motion to linear motion, and a guide rod.
To the disk 2 in the radial direction. The disk rotation mechanism includes a disk rotation motor 16 and a disk rotation turntable 17 coupled to the rotor. The turntable 17 engages with the metal hub 2b of the disk 2 to support and rotate the disk 2, and includes a spindle 18;
It comprises a magnet (not shown) for attracting the metal disk 2 b and a drive pin 19. The spindle 18 is a metal disk 2
b, and the drive pin 19 is inserted into the hole 2c.
inserted into d.

The basic structure of this disk drive is disclosed in the aforementioned Japanese Utility Model Application No. 60-103322 (Japanese Utility Model Application Laid-Open No. 62-1125).
9) and the like, the cartridge 1 is inserted into the holder 20 shown in FIG.
7. Since this type of configuration is well known, detailed description is omitted. Cartridge 1
In order to arrange the case 3 at a predetermined height position in the disk drive, a plurality of positioning projections (pins) 23 to 33 are formed on the die-cast aluminum frame 22.
Is provided. Among them, four projections 23, 24, 2
As is clear from FIGS. 1 and 4, reference numerals 5 and 26 are formed so as to come into contact with the peripheral portion (outer portion than the disk 2) of the back surface 5 of the case 3 of the cartridge 1 to determine the height position of the case 3. ing. The tips of the projections 23 and 24 enter the recesses 9a and 9b in FIG.

The projections 27, 28, 29, and 30 are arranged corresponding to the peripheral area of the opening 8b of the shutter 8 of the loaded cartridge 1, and come into contact when the shutter 8 is deformed so as to be warped outward. It is set to correct.
Therefore, the height of the projections 27 to 30 is slightly lower than the height of the projections 23 to 26. This projection 27 for restricting the shutter position
Nos. 30 to 30 cause the shutter 8 to contact unnecessary parts due to deformation.
To prevent damage to the shutter 8 or other parts.
Go.

The projections 31, 32, 33 are provided on the back 5 of the case 3.
Are arranged so as to limit the height position of the region in the vicinity of the central opening 5. These three projections 31, 32, and 33 are arranged at substantially equal angular intervals and do not come in contact with each other when the area near the opening 5 is not deformed so as to warp outward.
The height is set so as to be in contact with the outside when it is deformed outward by a predetermined amount or more. In this embodiment, since the height of the top surface of the projections 31, 32, and 33 is somewhat higher than the height of the upper surface of the motor 16, it is assumed that the vicinity of the opening 10 of the case 3 of the cartridge 1 is deformed so as to warp outward. Before reaching the upper surface of the motor 16, the projections 31, 32, 33
Limited by Therefore, it is possible to prevent the case 3 from contacting the rotor 16a of the motor 16 and damaging the case 3 or the rotor 16a. Also, the gap between the case 3 and the motor 16 can be reduced to achieve a reduction in thickness. The projections 27 to 30 and 31 to 33 are ground based on one of them (for example, 27) so that the entire top surface becomes the same plane (the same height).

In FIG. 3, the upper surface of the holder 20 which moves vertically together with the cartridge 1 is provided with a downwardly projecting portion 34, which is the surface 4 of the cartridge 1.
Contact Since the holder 20 is slightly elastically deformed, the thickness error of the case 3 can be absorbed and the case 3 can be fixed between the projections 23 to 26 and the projecting portion 34 on the upper surface of the holder 20.

As shown in FIG. 2, the upper surface plate of the holder 20 is also provided with a protruding portion 35 in a region facing the shutter 8 so that upward deformation of the shutter 8 is restricted.

The cartridge 1 is inserted into the holder 20 from right to left in FIG. 2, and when the cartridge 1 is inserted to a predetermined position, the shutter 8 opens the opening mechanism (not shown).
The sliding body 21 shown in FIG.
Is released, and the sliding body 21 moves from left to right in FIG. 2, whereby a force is applied to the holder 20 to move the holder 20 downward in FIG. And move downward to reach the state shown in FIG. At the time of ejection, the operation is reverse to the above.

[0017]

[Modifications] The present invention is not limited to the above-described embodiment, and for example, the following modifications are possible. (1) In the embodiment, when there is no outward deformation of the shutter 8 and the case 3, the heights of the projections 27 to 33 are set so that they do not contact the projections 27 to 33. It is also possible to configure such that the tips of the protrusions 27 to 33 come into contact with these without deformation. (2) The turntable 17 can be configured integrally with the rotor of the motor 16.

[Brief description of the drawings]

FIG. 1 is a plan view showing a relationship between a frame having protrusions, a disk rotating mechanism, and a cartridge of a floppy disk drive according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an enlarged part of a portion corresponding to line AA in FIG. 1 and omitting a part of a holder, a slide body, and a head carriage moving device.

FIG. 3 is an enlarged cross-sectional view showing a part of a portion corresponding to line BB in FIG. 1;

FIG. 4 is a plan view showing a positional relationship between a cartridge and a projection of a holder.

FIG. 5 is a plan view of the cartridge.

FIG. 6 is a bottom view of the cartridge.

[Explanation of symbols]

 1 Cartridge 3 Case 31, 32, 33 Projection

Claims (3)

(57) [Scope of request for utility model registration] 1. A recording medium disk (2) in a case (3)
And a pair of head insertion openings (6, 7) for contacting the magnetic head with the disk (2) are provided on the front surface (4) and the back surface (5) of the case (3),
An opening (10) for exposing a hub (2b) at the center of the disk is provided on a back surface (5) of the case (3), and a shutter for selectively covering the head insertion openings (6, 7). (8) is provided, and the shutter (8) is engaged with the case (3) so as to slide linearly along one side surface of the case (3), and the surface ( The shutter (8) is formed in a U-shape so as to extend from 4) to the back surface (5), and the shutter (8) uses a disk cartridge (1) provided with head insertion windows (8a, 8b). An apparatus for recording or reproducing signals, a disk rotating mechanism having a rotating table (17) engaged with a hub (2b) of the disk (2) and rotating the disk (2); Attach the disk (2) to (17) In the disk drive apparatus and a cartridge loading means for loading the cartridge (1) as the cartridge of the peripheral region of the back surface (5) of the case (3) of the cartridge (1) (1) A plurality of case rim positioning protrusions for determining the position in the thickness direction
(23-26) and the head insertion openings (6, 7) of the case (3).
The head insertion windows (8a, 8a) of the shutter (8)
the shutter (8) opened to coincide with b)
The head on the back (5) side of the case (3)
The position in the thickness direction of the peripheral area of the insertion window (8b) is controlled.
Shutter position limiting projections (27 to 3)
0) , and the shutter position limiting projection
(27 to 30) are protrusions (23) for positioning the peripheral edge of the case.
To 26) slightly lower than
Disk drive. 2. A recording medium disk (2) in a case (3).
Is accommodated, and the front surface (4) and the back surface of the case (3)
Let come in contact with a magnetic head to the disk (2) to (5)
A pair of head insertion openings (6, 7) for
The center of the disk is placed on the back (5) of the case (3).
An opening (10) for exposing the hub (2b) is provided.
And selectively covers the head insertion openings (6, 7).
Shutter (8) is provided, and the shutter (8) is
So that it slides linearly along one side of the case (3).
And the case (3) is engaged with the case (3).
U-shape extending from the front surface (4) to the back surface (5)
The shutter (8) has a head insertion window.
Disk cartridge provided with (8a, 8b)
An apparatus for recording or reproducing information signals using (1)
There turntable which engages the hub (2b) of the disc (2)
A disk having (17) for rotating the disk (2);
A disk rotation mechanism and the disk (2) are mounted on the turntable (17).
For loading the cartridge (1)
A disk drive device having a cartridge loading means, and a back surface of the case (3) of the cartridge (1).
(5) Thickness direction of the cartridge (1) in the peripheral region
Multiple case-edge positioning protrusions to determine the position of the
(23-26) and the back of the case (3) of the cartridge (1)
(5) The opening for exposing the pub (2b).
In order to limit the position in the thickness direction of the area near (10).
And a plurality of protrusions for restricting the position near the hub (31-33), and the protrusions for restricting the position near the hub are provided.
(31-33) are the projections (23) for positioning the periphery of the case.
To 26) slightly lower than
Disk drive. 3. A recording medium disk (2) in a case (3).
Is accommodated, and the front surface (4) and the back surface of the case (3)
(5) bringing a magnetic head into contact with the disk (2)
A pair of head insertion openings (6, 7) for
The center of the disk is placed on the back (5) of the case (3).
An opening (10) for exposing the hub (2b) is provided.
And selectively covers the head insertion openings (6, 7).
Shutter (8) is provided, and the shutter (8) is
So that it slides linearly along one side of the case (3).
And the case (3) is engaged with the case (3).
Shape in a U-shape so as to extend over the front surface (4) on the back (5)
The shutter (8) has a head insertion window.
Disk cartridge provided with (8a, 8b)
An apparatus for recording or reproducing information signals using (1)
There turntable which engages the hub (2b) of the disc (2)
A disk having (17) for rotating the disk (2);
A disk rotation mechanism and the disk (2) are mounted on the turntable (17).
For loading the cartridge (1)
A disk drive device having a cartridge loading means, and a back surface of the case (3) of the cartridge (1).
(5) Thickness direction of the cartridge (1) in the peripheral region
Multiple case-edge positioning protrusions to determine the position of the
(23-26) and the head insertion openings (6, 7) of the case (3).
The head insertion windows (8a, 8a) of the shutter (8)
the shutter (8) opened to coincide with b)
The head on the back (5) side of the case (3)
The position in the thickness direction of the peripheral area of the insertion window (8b) is controlled.
Shutter position limiting projections (27 to 3)
0) and the back of the case (3) of the cartridge (1)
(5) The opening for exposing the hub (2b).
In order to limit the position in the thickness direction of the area near (10).
A plurality of hub position limiting protrusions (31-33) for controlling the shutter position.
(27-30) and the hub position limiting protrusion (31)
To 33) are projections (23 to 2) for positioning the periphery of the case.
Characterized in that it is formed slightly lower than 6).
Disk drive.