JPH10188510A - Disc memory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve higher dustproofing performance during the operation of recording or reproducing information. SOLUTION: A disc table 11 is relatively inserted into a hub hole 51 formed in the lower half 43 of a mounted disc cartridge 41. A magnetic disc 45 within a cartridge 44 is chucked on the disc table 11 while an elastic sealing member 31 is pressed onto the outer circumference of the hub hole 51 against the elasticity of the lower half 43 and the outer circumference of the hub hole 51 is sealed up.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a disk cartridge and a disk storage device most suitable for application to a large-capacity disk storage device used in an information processing apparatus.

[0002]

2. Description of the Related Art Conventionally, as a large-capacity disk storage device typified by a removable hard disk drive (Removale Hard Disk Drive), there is one shown in FIGS. That is, as shown in FIGS. 6 to 9, a horizontally long cartridge insertion slot 3 is formed on a front panel 2 of the disk storage device 1, and an eject button 4 and the like are provided. A horizontal cartridge insertion space 5 connected to the cartridge insertion slot 3 is formed inside the disk storage device 1, and a spindle motor 7 is vertically disposed substantially at the center of the bottom of the cartridge insertion space 5. ing. The spindle motor 7 is, for example,
A spindle 9 perpendicular to the center of the motor housing 8 constituting the stator yoke is rotatably mounted by bearings, and a rotor 10 fixed near the upper end of the spindle 9 is housed in the motor housing 8 and the rotor 1
A known rotor magnet, an iron core and a stator coil are incorporated in the inner circumference of 0 and inside thereof. The rotor 10 of the spindle motor 7
A horizontal disk table 11 is integrally formed on the upper surface of the disk drive, and an annular chucking magnet 12 is horizontally embedded in the disk table 11.

[0003] The spindle motor 7 is driven by a driving mechanism 16 as a moving means in a vertical motor accommodating hole 15 formed in a chassis 14 so as to have an arrow a which is in the axial direction.
It is configured to be driven up and down in the b direction. In addition,
The chassis 14 has a plurality of cartridge positioning pins 17.
Are attached so that they can freely enter and exit in the directions of arrows a and b,
These positioning pins 17 are configured to be moved in and out in the directions of arrows a and b in synchronization with the spindle motor 7 by the drive mechanism 16. A plurality of leaf springs 19 as elastic pressing means are attached to the lower surface of the ceiling wall 18 of the cartridge insertion space 5. A head actuator 20 is disposed inside the disk storage device 1 at a position deeper than the cartridge insertion space 5 (on the opposite side from the cartridge insertion opening 3). The head actuator 20 includes a head arm 22 that is rotated about a vertical arm axis 21 in the directions of arrows c and d, and a pair of upper and lower suspensions 23 at the tip of the head arm 22.
And a pair of upper and lower flying heads 24, which are magnetic heads, and a linear motor 25 for driving the base side of the head arm 22 to rotate in directions indicated by arrows c and d. It comprises a voice coil 26 attached to the side 22 and a magnetic circuit component 27 composed of a magnet and a yoke fixed to the side of the chassis 14.

Next, this disk storage device 1 has a disk cartridge 41 shown in FIGS. 7, 10 and 11.
Is used. The disk cartridge 41 has a rectangular and thin cartridge 44 formed by combining upper and lower halves 42 and 43 formed of a synthetic resin from above and below by a plurality of screws or bonding. A magnetic disk 45, which is a large-capacity disk-shaped recording medium and is a double-sided hard disk, is rotatably accommodated in the cartridge 44 so as to be rotatable and movable in the axial directions a and b. ing. A magnetic disk 45 is accommodated inside a plurality of arc-shaped ribs 46 integrally formed on the inner walls of the upper and lower halves 42 and 43 and formed in a circular shape. A circular disk lifting regulation rib 47 for preventing the disk 45 from floating above a certain distance in the direction of arrow a is integrally formed.

[0005] Disc-shaped upper and lower hubs 48 and 49 are fitted into the circular center hole 45a of the magnetic disk 45 from above and below. They are fastened to each other and fixed to the magnetic disk 45. And the lower hub 49
However, there is also used a type in which the lower hub 49 is fixed to the magnetic disk 45 by bonding so that the upper hub 48 is omitted. And
Of these upper and lower hubs 48 and 49, at least the lower hub 4
9 is made of a ferromagnetic material such as an iron plate. A circular hub hole 51 is formed substantially at the center of the lower half 43, and the lower half 43 has a cylindrical hub hole outer peripheral rib which rises vertically upward at the outer periphery of the hub hole 51. 52
Are integrally formed. An annular groove 53 formed concentrically on the outer periphery of the lower surface of the lower hub 49 is loosely fitted to the hub hole outer peripheral rib 52 from above (refers to fitting with play).
Have been. In the center of the lower surface of the lower hub 49, there is formed a spintor fitting hole 54 which is a concentric cylindrical concave portion.

[0006] A laterally long head insertion opening 55 is opened at one end of the insertion side end 41a of the disk cartridge 41 into the disk storage device 1, and a shutter 56 for opening and closing the head insertion opening 55 is attached. Have been. The shutter 56 has a U-shaped cross section made of a stainless steel plate or the like.
The upper and lower halves 42, 43 slide in the directions of arrows e, f along the insertion side end 41a in a pair of upper and lower shutter sliding recesses 57 formed on the upper and lower surfaces 42a, 43a of the upper and lower halves 42, 43. Mounted freely. The shutter 57 is slid in the direction of arrow e to a closed position by a built-in shutter spring (not shown). An opening / closing means engaging portion 58 is formed at one end of the shutter 56. The disk cartridge 41 shown in FIG. 12 has two to n sheets, that is, a plurality of magnetic disks 45 in the cartridge 44.
At regular intervals and concentrically via a spacer 59,
The plurality of magnetic disks 4 are arranged in parallel.
5 is sandwiched and fixed from above and below by upper and lower hubs 48 and 49 and set screws 50 as described above. Therefore,
In the disk storage device 1 described above, the disk cartridge 41 to be used is divided into a type having a single magnetic disk 45 as shown in FIG. 10 and a type having a plurality of magnetic disks 45 as shown in FIG. The suspension 23 and the flying head 24 which are twice the number of the magnetic disks 45 are provided on the head arm 20.

The disk storage device 1 and the disk cartridge 41 are configured as described above. When loading the disk cartridge 41 into the disk storage device 1, as shown in FIGS. From the insertion side end 41a side, the cartridge is horizontally inserted into the cartridge insertion slot 3 of the disk storage device 1 in the direction of arrow g. Then, the disk cartridge 4
8 is automatically retracted in a direction indicated by an arrow g to a predetermined position in a cartridge insertion space 5 by a loading mechanism (not shown) provided in the disk storage device 1 as shown in FIG. The lid 56 (not shown) automatically opens the shutter 56 of the disk cartridge 41 in the direction of arrow f to the open position shown in FIG.
Are released, and a pair of upper and lower flying heads 24 of the head actuator 20 are relatively inserted into the cartridge 44 from the head insertion port 55 in the direction of the arrow h, and these pair of flying heads 24 are inserted above and below the magnetic disk 44. You.

When the sensor detects that the disk cartridge 41 has been pulled in the direction of arrow g to a predetermined position in the cartridge insertion space 5, the drive mechanism 16 moves the spindle motor 7 to the raised position shown in FIG. The plurality of cartridge positioning pins 17 are also raised in the direction of arrow a while being driven upward in the direction. The plurality of cartridge positioning pins 1
7 are engaged and positioned in a plurality of positioning holes formed in the lower half 43 of the disk cartridge 41, and the disk cartridge 41 is placed on the plurality of cartridge positioning pins 17 by the pressing force of the plurality of leaf springs 19. It is pressed and fixed in the direction of arrow b.

Then, the upper end of the spindle 9 of the spindle motor 7 raised in the direction of arrow a is fitted into the spindle fitting hole 54 of the lower hub 49 of the magnetic disk 45 from the direction of arrow a, and the disk table 11 is The lower hub 49 of the magnetic disk 45 is inserted into the hub hole 51 of the cartridge 41 from the direction of the arrow a by the magnetic attraction force of the chucking magnet 12 and the disk table 11
At the same time as chucking upward, the disk table 11 pushes up the lower hub 49 by a certain distance in the direction of arrow a. Then, the annular groove 53 of the hub 49 is moved to the lower half 43.
And the magnetic disk 45 is lifted in the direction of arrow a to a substantially intermediate position between the upper and lower halves 42 and 43, and the magnetic disk 4
5 and the upper and lower hubs 48 and 49 are set in a non-contact state with respect to the upper and lower halves 42 and 43, and the loading operation of the disk cartridge 41 into the disk storage device 1 ends.

After the loading operation is completed,
The magnetic disk 45 is driven to rotate at high speed in the disk cartridge 41 via the upper and lower hubs 48 and 49 by the disk table 11 which is driven to rotate integrally with the rotor 10 of the spindle motor 7, and the rotation of the magnetic disk 45 is maintained at a constant angular velocity. At this point, the head arm 22 of the head actuator 20 is rotated by the linear motor 25 from the retracted position shown by the solid line in FIG. 7 to the position shown by the dashed line in FIG. The pair of flying heads 24 is gently landed on the upper and lower surfaces of the magnetic disk 45 by the pair of upper and lower suspensions 23. However,
The pair of upper and lower flying heads 24 does not actually contact the upper and lower surfaces of the magnetic disk 45, and the air film formed between the flying head 24 and the plane of the magnetic disk 45 and the spring force of the suspension 23 Of the pair of upper and lower flying heads 24 with respect to the upper and lower surfaces of the magnetic disk 45,
The flying height (flying height) of μm is maintained. In this landing state, the head actuator 20 seeks and tracks the pair of upper and lower flying heads 24 in the directions of arrows c and d, and these flying heads 24 record a large amount of information on the upper and lower surfaces of the magnetic disk 45. Will be played. At the time of unloading after recording and reproduction, the pair of upper and lower flying heads 24 are returned to the retracted position indicated by the solid line in FIG. The pin 17 is lowered in the direction of arrow b to the lower position shown in FIG.
1 is removed from the disk cartridge 41 in the direction of arrow b, the disk cartridge 41 is pushed out of the cartridge insertion opening 3 in the direction of arrow f,
6 is slid in the direction of the arrow e to the closed position shown in FIG. 6, and the head insertion port 55 is closed.

[0011]

As described above, in this type of disk storage device 1, when information is recorded on and reproduced from the magnetic disk 45 by the flying head 24, several tens of
It is necessary to maintain a very small flying height of μm, and the allowable displacement is extremely small at ± 10% (± several μm). Therefore, this type of disk storage device 1 is very weak against dust and the like, and when recording and reproducing information, dust and the like may enter the disk cartridge 41 and adhere to the surface of the magnetic disk 45. Even if the dust or the like is very small, not only does the recording and reproduction of information fail, that is, the read / write performance by the flying head 24 deteriorates, but in some cases, the dust or the like adheres to the magnetic head. There is even a danger that the surface of the disk 45 will be damaged or the flying head 24 will be physically destroyed (head crash). However, in the conventional disk storage device 1, as shown in FIG. 8, the head insertion port 55 of the disk cartridge 41 is fully opened during the operation of recording and reproducing information, and the disk storage device 1 is inserted into the hub hole 51. Since there is a gap in the outer periphery of the disk table 11, external air containing dust and the like is discharged by the pumping action accompanying the high-speed rotation of the magnetic disk 45.
It was easy to flow into 4. That is, when the magnetic disk 45 is rotated at a high speed in the cartridge 44, an air flow is generated on the surface of the magnetic disk 45 by which air is drawn by viscous resistance, and a function like a kind of centrifugal pump is generated. is near the center is the negative pressure of the magnetic disk 45 at the inner and at the same time outside air a ₁ containing dust is sucked into the cartridge 44 through the hub hole 51, air a ₂ in the cartridge 44 is the head insertion Mouth 55
It is exhausted from. Then, there is a problem that the easy dust sucked together with external air A ₁ into the cartridge 44 through the hub hole 51 is attached to the surface of the magnetic disk 45.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and provides a disk storage device capable of exhibiting high dustproofness during information recording and reproducing operations. It is intended to be.

[0013]

According to a first aspect of the present invention, there is provided a disk storage device comprising: a disk table which is relatively inserted into a hub hole formed in a lower half of a mounted disk cartridge; In addition, the disk-shaped recording medium in the disk cartridge is chucked on the disk table, and the outer periphery of the hub hole is sealed by sealing means.

In the disk storage device of the present invention configured as described above, after recording and reproducing information while rotating a disk-shaped recording medium at a high speed by a disk table after mounting a disk cartridge, a hub hole is required. Can be sealed all the time by a sealing means.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk storage device to which the present invention is applied will be described below with reference to FIGS. The same components as those in FIGS. 6 to 12 are denoted by the same reference numerals, and the description will not be repeated.

First Embodiment First, a first embodiment will be described with reference to FIGS. 1, 2 and 5A. In the first embodiment, the loading and unloading are performed by a driving mechanism 16 (this driving mechanism 16 is configured as a moving means in the axial direction of the spindle motor 7) in the directions of arrows a and b, which are the vertical axis directions. When the loading of the disk cartridge 41 is completed using the spindle motor 7 driven up and down,
The outer periphery of the hub hole 51 formed in the lower half 43 is automatically sealed by an elastic sealing member 31 as sealing means. That is, the upper end of the motor housing 8 of the vertical spindle motor 7 is annularly formed at the outer peripheral position of the disk table 11, and is formed on the horizontally formed upper surface 8a by an elastic member such as rubber or plastic. The member 31 is fixed in a substantially concentric shape by bonding or the like. The inner diameter of the seal member 31 is larger than the inner diameter of the hub hole 51. And, for example, FIG.
(A) is used, and a crimping portion 31a having a substantially inverted truncated conical shape (a shape similar to the tip shape of a wrapper) and a horizontal base portion 31b are integrally formed. The inner periphery of the portion 31a is formed on the tapered surface 32. The seal member 31 is fixed to the upper surface 8a of the motor housing 8 with a base 31b by bonding or the like.

According to the first embodiment, as shown in FIG. 2, when the disc cartridge 41 is in the unloading state, the spindle motor 7 is lowered by the driving mechanism 16 in the direction of the arrow b to the lowered position. Thereby, the seal member 31 is lowered from the cartridge insertion space 5 in the direction of arrow b. Next, as shown in FIG.
When loading the disk cartridge 41, after the disk cartridge 41 is pulled into the cartridge insertion space 5 horizontally in the direction of arrow g, the drive mechanism 16
As a result, the spindle motor 7 and the plurality of cartridge positioning pins 17 are vertically raised in the direction of arrow a to the elevating position, and the lower half 43 of the disc cartridge 41 is pressed by the pressing force in the direction of arrow b below the plurality of leaf springs 19. Is pressed onto a plurality of cartridge positioning pins 17 and positioned.
And the disk table 11 is the disk cartridge 41
Is inserted into the hub hole 51 from the direction of arrow a. And
The spindle 9 and the disk table 11 are chucked from below by the lower hub 49 of the magnetic disk 45, and the magnetic disk 45 is attached to the upper and lower half 4 of the cartridge 44.
It floats in the direction of arrow a to a substantially intermediate position between 2 and 43.

At substantially the same time, the sealing member 3
1 is pressed against the outer peripheral position of the hub hole 51 against the elasticity of the hub hole 51 from the direction of the arrow a on the lower surface 43a of the lower half 43 of the cartridge 44 of the disk cartridge 41 by the tapered surface 32 thereof. Automatically seal the outer circumference of At this time, the arrow b by the plurality of leaf springs 19
The resultant force F ₁ of the pressing force in the direction
The greater than pressing force F ₂ for crimping against the elastic direction of arrow a to the lower surface 43a of the lower half 43 1a (i.e., F ₁
> F ₂ ), the crimping portion 31
Can be securely adhered to the lower surface 43a of the lower half 43. Also, increasing the magnetic attraction force F ₃ of the lower hub 49 by chucking magnet 12 than the pressing force F ₂ (i.e., F _3> F ₂₎ By setting the lower hub 49 on the disc table 11 Magnet chucking can be performed reliably.

At this time, when the crimping portion 31a of the seal member 31, which is formed in a substantially inverted truncated cone shape, is crimped on the lower surface 43a of the lower half 43 from the direction of arrow a by the tapered surface 32, the crimping portion 31a As a result, the outermost periphery on the upper end side extends in the circumferential direction against the elasticity. As a result, the crimping portion 31a elastically deforms outward in the direction of arrow i. It does not elastically deform and does not interfere with the disk table 11 at all.
In addition, the elastic deformation of the crimping portion 31a in the direction of the arrow i causes the tapered surface 3
The contact angle from the center side of the hub hole 51 of the second to the outside is acute angle α.
Formed.

Therefore, when recording and reproducing information after the loading of the disk cartridge 41 is completed, the magnetic disk 45 is rotated at a high speed by the spindle motor 7 in the cartridge 44, so that air is viscous on the surface of the magnetic disk 45. The air flow generated by the resistance is generated, and the magnetic disk 45 in the cartridge 44 is operated by a function like a kind of centrifugal pump.
The area around the center becomes negative pressure and contains external air A ₁ containing dust and the like.
There is also about to be sucked into the cartridge 44 through the hub hole 51, because the hub hole 51 is already sealed by the sealing member 31, the air A ₁ containing dust or the like into the cartridge 44 from the hub hole 51 Inhalation can be prevented beforehand. Moreover, at this time, since the contact angle of the tapered surface 32 of the seal member 31 with the lower surface 43a of the lower half 43 is formed at an acute angle α, the crimping portion 31a of the seal member 31 has the same function as the check valve. demonstrated, it can be stopped quite reliably eating the inflow of external air a ₁ about to be drawn into the hub bore 51 through between the crimp portion 31a and the lower half 43.

Therefore, during the operation of recording and reproducing information and the like, external air containing dust and the like is prevented from flowing into the cartridge 44 from the hub hole 51, and the dust and the like fall on the surface of the magnetic disk 45. Since the adhesion can be prevented beforehand, high dustproofness can be exhibited during the operation of recording and reproducing the information. Therefore, it is possible to prevent read / write performance degradation by the flying head 24 due to dust or the like, to prevent the surface of the magnetic disk 45 from being damaged, and to prevent a head crash or the like from occurring. Reproduction can be performed with high accuracy. Also, the cartridge 4 is inserted through the hub hole 51.
4 by blocking the inflow of external air A ₁ into
The air A ₂ in the cartridge 44 is
Inside the only to be circulated, its air A ₂ is less likely to be discharged to the outside from the head insertion port 5. Therefore, the air A ₂ in the cartridge 44 is vigorously discharged from the head insertion port 55 to the outside, and disturbs the air in the disk storage device 1, causing dust to be formed inside the disk storage device 1. Inconveniences such as dust and the like easily entering the cartridge 44 do not occur.

Second Embodiment Next, a second embodiment will be described with reference to FIGS. 3, 4 and 5A. In the second embodiment, a sealing member 31, which is a sealing means, a disk table 11, and a spindle motor 7 are fixed at fixed positions, and a disk cartridge 41 is moved by a cartridge holder 33, which is a moving means, in the direction of an arrow a which is in the vertical axis direction. When the loading of the disk cartridge 41 is completed, the outer periphery of the hub hole 51 formed in the lower half 43 of the cartridge 44 is automatically sealed by the seal member 31 by driving up and down in the direction b. It is. That is, the spindle motor 7 is moved horizontally by the motor housing 8 of the chassis 1.
4, a sealing member 31 similar to that described above is fixed on the chassis 14 at the outer peripheral position of the spindle motor 7 in a concentric manner by bonding or the like. The plurality of cartridge positioning pins 17 are also fixed on the chassis 14. A cartridge holder 33 is horizontally disposed above the chassis 14, and a horizontal cartridge insertion space 5 having one end connected to the cartridge insertion slot 13 is formed inside the cartridge holder 33. A plurality of leaf springs 19 are fixed to the lower surface of the ceiling wall 33a. An opening 33c is formed in the bottom wall 33b of the cartridge holder 33. The cartridge holder 33 is configured to be driven to move up and down in the directions of arrows a and b by a driving mechanism 34 as moving means.

According to the second embodiment, as shown in FIG. 4, when the disc cartridge 41 is in the unloaded state, the cartridge holder 33 is raised horizontally in the direction of arrow a by the drive mechanism 34 to the raised position. ing. Next, as shown in FIG. 3, when the disk cartridge 41 is loaded, the disk cartridge 41 is pulled into the cartridge insertion space 5 of the cartridge holder 33 horizontally in the direction of arrow g, and then the cartridge holder 41 is driven by the drive mechanism 34. 33 is lowered horizontally to the lower position in the direction of arrow b, and the lower half 43 of the disc cartridge 41 is pressed onto the plurality of cartridge positioning pins 17 by pressing force in the direction of arrow b below the plurality of leaf springs 19. The spindle 9 of the spindle motor 7 and the disk table 11 are relatively inserted into the hub hole 51 of the disk cartridge 41 from the direction of arrow a. Then, the spindle 9 and the disk table 11 are chucked into the hub hole 51 of the magnetic disk 45 from below, and the disk table 11 is attached to the upper and lower halves 42, 43 of the cartridge 44.
It floats in the direction of arrow a to a substantially intermediate position between them.

At substantially the same time, the sealing member 3
1 is an arrow a in the opening 33c of the cartridge holder 33.
The lower portion 43 a of the lower half 43 of the cartridge 44 of the disk cartridge 41 is tapered by the crimping portion 31 a of the seal member 31.
Then, relative to the outer peripheral position of the hub hole 51 from the direction of arrow b,
Further, the outer periphery of the hub hole 51 is automatically sealed by being crimped against the elasticity. Then, similarly to the first embodiment, the tapered surface 32 of the crimping portion 31 a of the seal member 31 is brought into close contact with the lower surface 43 a of the lower half 43 at a contact angle of the acute angle α. Also in this case, similarly to the first embodiment, the resultant force F ₁ of the pressing force of the plurality of leaf springs 19 in the direction of arrow b is applied to the crimping portion 31 a of the seal member 31 and the lower surface 43 a of the lower half 43.
Greater than pressing force F ₂ for crimping against the elastic direction of arrow a in (i.e., F _1> F ₂₎ By setting the lower surface of the lower half 43 of the tapered surface 32 of the crimp portion 31 43a can be securely adhered. Also, increasing the magnetic attraction force F ₃ of the lower hub 49 by chucking magnet 12 than the pressing force F ₂ (i.e., F _3>
F ₂ ) By setting, disk table 1
The lower hub 49 can be securely magnetically chucked on the upper part 1.

Therefore, also in the second embodiment,
The same effects as in the first embodiment can be obtained. However, in the second embodiment, since the seal member 31 only needs to be fixed at a fixed position on the chassis 14 or the like, the degree of freedom of the attachment portion of the seal member 31 is high, and the design and manufacture are easy. Of course, the seal member 31 may be attached to the motor housing 8 of the spindle motor 7 as in the first embodiment.

[Plural Embodiments of Seal Member] Next, plural embodiments of the seal member 31 will be described with reference to FIGS. That is, as described above, the sealing member 31 shown in FIG. 5A is formed by integrally forming the crimped portion 31a having a substantially inverted truncated cone shape and the horizontal base 31b, and the inner periphery of the crimped portion 31a is tapered. Surface 32 is formed,
The base 31b is fixed to the motor housing 8, the chassis 14, or the like by bonding or the like.
The seal member 31 shown in FIG. 5 (B) has a base 31b formed vertically and fitted into an annular groove 35 formed in the motor housing 8, the chassis 14, or the like, and fixed by bonding or the like. It was done. The seal member 31 shown in FIG. 5C has a tapered surface 32 formed on the inner periphery of a crimped portion 31a having a semicircular cross section, and a base 31b, which is a pair of lower ends thereof, is connected to a motor housing. 8 and the chassis 14 and the like are fixed by bonding or the like.
FIG. 5D shows a tapered surface 32 formed on the inner periphery of a hollow crimping portion 31a having a substantially triangular cross section and a base 31b serving as a bottom portion. 8 and fixed on the chassis 14 by bonding or the like. FIG. 5E shows a tapered surface 32 on the inner periphery of the crimping portion 31a formed in a hollow cylindrical shape.
The base 31b, which is the circular bottom, is fitted into an annular groove 35 formed in the motor housing 8, the chassis 14, or the like, and is fixed by bonding or the like. The seal member 31 shown in FIGS. 5A to 5E is an example, and the material and shape of the seal member 31 can be variously changed.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made based on the technical concept of the present invention. For example, the disk-shaped recording medium is not limited to the magnetic disk such as the hard disk described in the embodiment, and a magnetic sheet, an optical disk, a magneto-optical disk and other various disk-shaped recording media can be used.

[0028]

The disk storage device of the present invention configured as described above has the following effects.

According to a first aspect of the present invention, when recording and reproducing information while rotating a disk-shaped recording medium at a high speed by a disk table after mounting a disk cartridge,
Since the hub hole can be sealed all the time by the sealing means, during the operation of recording and reproducing the information, external air including dust and the like is sucked into the disk cartridge from the hub hole by the pump action. As a result, the dust adheres to the surface of the disk-shaped recording medium, thereby preventing read / write performance deterioration due to the head, scratching of the disk-shaped recording medium, head crash, etc., and recording of information. In addition, a high dustproof property can be exhibited during a reproducing operation, and information can be recorded and reproduced with high accuracy, and a high-performance and highly reliable disk storage device can be provided.

According to a second aspect of the present invention, the sealing means is moved in the axial direction of the spindle motor with respect to the disk cartridge together with the spindle, so that the mounting means can be mounted only by attaching the sealing means to the motor housing of the spindle motor. Thus, the outer periphery of the hub hole of the disc cartridge can be easily sealed.

According to a third aspect of the present invention, the sealing means and the spindle motor are fixed at a fixed position, and the disk cartridge is moved in the axial direction of the spindle motor. Therefore, the sealing means can be freely attached to a fixed portion such as a chassis. It has a high degree of freedom in the installation of the sealing means,
Manufacturing becomes easier.

In the fourth aspect, the pressing force of the means for elastically pressing the disk cartridge against the sealing means is configured to be larger than the pressing force of the sealing means on the lower half of the disk cartridge. The hub hole can be securely adhered, and the hub hole can be securely sealed.

According to a fifth aspect of the present invention, the magnetic attraction of the chucking magnet for chucking the mounted disk-shaped recording medium hub to the disk table is increased by the pressing force of the sealing means against the lower half. The chucking of the disc-shaped recording medium and the press-fitting of the sealing means to the lower half can both be performed reliably,
The hub hole can be securely sealed.

According to the sixth aspect of the present invention, since the sealing means is formed of an annular elastic member, the sealing means can be easily manufactured from rubber, plastic, or the like, and a low-cost one can be obtained.

According to a seventh aspect of the present invention, the sealing means has a tapered surface whose diameter gradually increases outward from the center, and the tapered surface is pressed against the lower half against elasticity. Is formed so as to form an acute angle from the center of the hub hole toward the outside, so that the external air that is about to be sucked into the cartridge from the hub hole can be blocked very reliably by the same function as the check valve. As a result, the inflow of external air containing dust and the like into the cartridge can be extremely reliably prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view showing a loading state of a disk cartridge for describing a first embodiment of a disk storage device to which the present invention is applied.

FIG. 2 is a cross-sectional side view showing an unloaded state of the disk cartridge according to the first embodiment.

FIG. 3 is a cross-sectional side view showing a loading state of a disk cartridge according to the second embodiment.

FIG. 4 is a sectional side view showing an unloaded state of the disk cartridge according to the second embodiment.

FIG. 5 is a cross-sectional side view showing a plurality of embodiments of a seal member as a sealing means.

FIG. 6 is a perspective view showing a conventional disk cartridge and a disk storage device.

FIG. 7 is a partially cutaway plan view showing a state where a disk cartridge is loaded into a conventional disk storage device.

FIG. 8 is a cross-sectional side view showing an unloaded state of a disk cartridge of a conventional disk storage device.

FIG. 9 is a sectional side view showing a loading state of a disk cartridge of a conventional disk storage device.

FIG. 10 is a sectional side view of a conventional disk cartridge.

FIG. 11 is an exploded perspective view of the same.

FIG. 12 is a cross-sectional side view of a type in which a plurality of magnetic disks of a conventional disk cartridge are stored.

[Explanation of symbols]

1 is a disk storage device, 7 is a spindle motor, 8 is a spindle, 11 is a disk table, 14 is a chassis,
Reference numeral 16 denotes a driving mechanism serving as an axial moving means of a spindle motor, 19 denotes a leaf spring, 31 denotes a sealing member serving as sealing means,
32 is a tapered surface of the seal member, 33 is a cartridge holder which is a means for moving the disk cartridge in the axial direction, 3
4 is a drive mechanism of a cartridge holder, 41 is a disk cartridge, 42 is an upper half, 43 is a lower half, 44
Is a cartridge, 45 is a magnetic disk which is a disk-shaped recording medium, 49 is a lower hub which is a hub, and 51 is a hub hole.

Claims (7)

[Claims] A disk cartridge in which a disk-shaped recording medium is rotatably and axially housed in a cartridge, and a hub hole facing a hub of the disk-shaped recording medium is formed in a lower half of the cartridge. By mounting the disk cartridge, the disk table is engaged with the hub to push up the disk-shaped recording medium relatively to a substantially central position between the upper and lower halves of the cartridge, and the disk table is rotationally driven. A disk storage device comprising: a spindle motor; and a sealing means for sealing an outer periphery of a hub hole of the mounted disk cartridge. 2. A disk storage device according to claim 1, further comprising means for moving said sealing means together with said spindle motor in an axial direction of said spindle motor with respect to said disk cartridge. 3. The disk storage device according to claim 1, further comprising means for fixing the sealing means and the spindle motor at a fixed position, and means for moving the disk cartridge in the axial direction of the spindle motor. 4. The apparatus according to claim 1, wherein the pressing force of the means for elastically pressing the disk cartridge against the sealing means is greater than the pressing force of the sealing means on the lower half of the disk cartridge. A disk storage device according to claim 2 or claim 3. 5. A magnetic suction force of a chucking magnet for chucking the mounted disk-shaped recording medium hub to the disk table is larger than a pressing force of the sealing means to the lower half. The disk storage device according to claim 1 or claim 2, claim 3, or claim 3 or claim 4. 6. The disk storage device according to claim 1, wherein said sealing means is constituted by an annular elastic member. 7. The sealing means has a tapered surface whose diameter is gradually increased from the center to the outside, and the angle when the tapered surface is crimped against the lower half against elasticity. 7. The disk storage device according to claim 6, wherein the hub hole is formed so as to form an acute angle outward from a center side of the hub hole.