JP2005339744A - Disc device with respiratory filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a disk from being damaged due to contact between a disk and a lamp or contact between disks when an impact is applied from the outside when the HDD is not operating, and having a breathing filter that regulates disk deformation without increasing the number of parts. A disk apparatus according to the present invention includes one or more rewritable disks, a spindle motor that rotates the disk around a rotation axis, and information recording or recording on the disk. A head for performing reproduction, a housing for housing the disk, the spindle motor, and the head; a limiter unit provided in the housing for restricting deformation in the rotational axis direction generated in the disk by an impact on the disk device; A breathing filter having a filter section for purifying air entering from outside the housing. .
[Selection] Figure 2

Description

  The present invention relates to a disk device, and more particularly to a disk device having a breathing filter for removing gas and dust contained in air.

  In a conventional hard disk drive (HDD), information is recorded / reproduced on / from a disk in a state where a disk as a recording medium and a head (slider mounted with a magnetic head element) are close to each other. Specifically, the slider moves onto a target track while flying over the disk at a minute interval, and information is recorded or reproduced on the disk by a magnetic head element.

  By the way, in the HDD, organic gas is mainly generated from various parts constituting a drive mechanism (including a mechanism part related to driving in addition to the head and the disk). This gas is presumed to be generated from an adhesive used for fixing plastic parts and rubber parts. In addition, due to fluctuations in atmospheric pressure and the like, the HDD is provided with a breathing hole necessary for air to enter and exit from the outside, so that dust contained in the air may enter the drive. Since the HDD is generally often installed in a host system such as a personal computer, the gas may be generated not only from within the HDD but also from the host system. Further, dust may be generated not only from the outside but also from a spindle motor or a voice coil motor inside the HDD.

  On the other hand, in recent HDDs, various technical developments have been promoted in response to a demand for higher recording density of information recorded on a disk. In this technology development, the head load / unload mechanism (also called ramp load mechanism) is called a ramp without contacting a head loaded on a disk (usually a flying head) with the disk surface. This is a mechanism for retracting the member.

  In an HDD adopting this load / unload mechanism, the ramp is generally arranged so as to overlap the disk surface from the periphery of the disk. In many cases, a plurality of disks are mounted on the HDD, and the number of heads corresponding to each surface of the disk is provided, and the lamps are provided as many as the number of heads. In addition to the uppermost and lowermost surfaces of the plurality of disks, the lamp is disposed so as to protrude between the two disks, and the disk and the lamp have an overlapping portion.

  In such an HDD, when an impact or the like is received from the outside during non-operation, the disk comes into contact with a thin lamp, and this contact may cause plastic deformation of the lamp.

  Further, during the operation of the HDD, the disk is rotated at a high speed by a spindle motor. When in this rotating state, a flutter phenomenon in which the disk itself is shaken by the air flow may occur. This flutter phenomenon refers to the disk vibration excited by the air flow. In particular, the flutter phenomenon in the axial direction of the spindle motor deteriorates the head positioning accuracy in the HDD employing the above-described load / unload mechanism. This is also a cause of contact between disc playing cards, and in the case of an HDD equipped with a plurality of discs, it also causes contact between discs. Therefore, there has been a demand for a method for restricting disk deformation caused by the above-described impact or flutter phenomenon.

  Therefore, as a prior art for solving the above-described disk deformation problem, the technique of Patent Document 1 has been proposed. In other words, by projecting from the base and cover, which are the device housing, in the outer circumferential direction, the limiter area is configured by the device housing. The disk data area is used.

US Pat. No. 5,575,587 (FIG. 1, overview)

  However, the HDD is always required to be miniaturized, and it is more difficult to bother to deform the device housing and provide a disk deformation area. Further, it is required to improve the above-described disk deformation and impact resistance while maintaining the conventional shape and the number of parts as much as possible.

  Therefore, the present invention has been made to solve the above-described problem, and prevents the disk from being damaged by contact between the disk and the lamp when the HDD is not operated, or when the disk receives a shock from the outside, or contact between the disks. An object of the present invention is to provide a disk device having a breathing filter that restricts disk deformation without increasing the number of parts.

  In order to solve the above-described problems, a magnetic disk device according to the present invention includes one or more rewritable disks, a spindle motor that rotates the disk around a rotation axis, and information with respect to the disk. A recording / reproducing head, a housing for housing the disk, spindle motor and head, and a limiter provided in the housing for restricting deformation in the direction of the rotation axis generated in the disk due to an impact on the disk device And a breathing filter having a filter section for purifying air entering from the outside of the housing.

  According to the present invention, by adopting the configuration as described above, it is possible to prevent the disk from being damaged by contact between the disk and the lamp when the HDD receives an impact or the like when the HDD is not operating, or between the disks. It is possible to provide a disk device having a respiratory filter that regulates disk deformation without increasing the number of points.

An embodiment in which the present invention is applied to a disk device, that is, a hard disk drive (hereinafter referred to as HDD) will be described in detail below with reference to the drawings.
As shown in FIGS. 1 to 3, the HDD according to the present embodiment is screwed to the base housing 1 by a base housing 1 that is a rectangular box-shaped case having an open top surface and a plurality of screws (not shown). And a top cover 12 that closes the upper end opening of the base housing 1.

  In the base housing 1, for example, two magnetic disks 2 as magnetic recording media, a spindle motor (hereinafter referred to as SPM) 3 as a driving means for supporting and rotating the magnetic disk 2, and a magnetic disk 2 on the SPM 3 are provided. A clamper 4 as a fixing member when mounting the magnetic head, a plurality of magnetic heads 5 for writing and reading information to and from the magnetic disk 2, and a head actuator 6 that supports these magnetic heads 5 movably with respect to the magnetic disk 2. A substrate unit 8 having a voice coil motor (hereinafter referred to as VCM) 7 for rotating and positioning the head actuator 6, a ramp load mechanism 9 for holding the magnetic head 5 at a position separated from the magnetic disk 2, and a head IC, etc. It is stored.

A printed circuit board (not shown) that controls the operation of the SPM 3 and the VCM 7 is screwed to the outer surface of the bottom wall of the base housing 1 via the board unit 8.
In the HDD of this embodiment, for example, each magnetic disk 2 is formed with a diameter of 65 mm (9 inches), and has magnetic recording layers on the upper surface and the lower surface. The magnetic disk 2 is coaxially fitted to a hub (not shown) of the SPM 3 and is held by a clamper 4. The two magnetic disks 2 are rotationally driven at a predetermined speed by the SPM 3.

  The head actuator 6 includes a bearing assembly 10 fixed on the bottom wall of the base housing 1. The bearing assembly 10 includes a pivot that is erected perpendicularly to the bottom wall of the base housing 1 and a cylindrical hub that is rotatably supported by a pivot through an integral bearing. .

  The head actuator 6 includes four arms attached to the hub and extending from the bearing assembly 10, a support frame attached to the bearing assembly and extending in a direction opposite to the arm, and a magnetic head assembly supported by each arm. And a solid. The four arms are positioned in parallel to each other with a predetermined interval and extend from the hub in the same direction.

  Each magnetic head assembly includes an elongated plate-like suspension that can be elastically deformed, and a magnetic head 5 that is fixed to the tip of the suspension via a gimbal portion (not shown). The suspension is constituted by a leaf spring, and its base end is fixed to the tip of the arm by spot welding or adhesion, and extends from the arm.

  Each suspension is integrally provided with a tab extending from its tip. The tab functions as an engaging portion that constitutes a part of the ramp load mechanism 9. The support frame of the head actuator 6 is made of synthetic resin, and a voice coil is integrally embedded in the support frame.

  In a state where the head actuator 6 configured as described above is incorporated in the base housing 1, each magnetic disk 2 is positioned between the two arms. The magnetic head 5 attached to the suspension faces the upper and lower surfaces of the magnetic disk 2 and sandwiches the magnetic disk 2 from both sides. Each head 5 is applied with a predetermined head load toward the surface of the magnetic disk by the spring force of the suspension.

  The voice coil fixed to the support frame of the head actuator 6 is positioned between a pair of yokes fixed on the base housing 1, and the VCM 7 is mounted together with these yokes and a magnet (not shown) fixed to one of the yokes. It is composed. When the voice coil is energized, the head actuator 6 is rotated, and the magnetic head 5 is moved and positioned on a desired track of the magnetic disk 2. When the HDD is not operating, the head actuator 6 is rotated to a non-operating position on the ramp 9, and excessive rotation beyond the non-operating position is restricted by a stopper provided on the yoke.

  Further, a breathing filter 11 described later is disposed on the base housing 5 along the outer periphery of the magnetic disk 2. The respiratory filter 11 is disposed at a target position with the ramp mechanism 9 disposed around the rotation axis of the SPM 3 with the magnetic disk 2 interposed therebetween. As shown in FIG. 1 and FIG. 2, specifically, it is arranged at the corner of the base housing 1 where the ramp mechanism 9 is arranged and the corner of the diagonal position.

  In this breathing filter 11, a filter part 11a and a limiter part 11b are integrally formed, and the filter part 11a is filled with activated carbon or the like for purifying air. Further, the limiter unit 11b protrudes from the filter unit 11a toward the outer peripheral edge of the magnetic disk 2 and is disposed so as to overlap the surface of the magnetic disk 2 with a predetermined distance from the magnetic disk 2.

  A breathing hole 1a that allows air to enter and exit from the outside of the HDD is provided at the bottom of the base housing 1 of the HDD. The breathing filter 11 is fixed so that the filter portion 11a is positioned on the breathing hole 1a provided in the base housing 1, and air entering the HDD from outside the HDD is purified through the filter portion 1a. Is done.

(First embodiment)
Next, the structure of the respiratory filter 11 according to the first embodiment of the present invention will be described in detail with reference to FIGS.
As shown in FIGS. 3 to 4, the respiratory filter 11 of the present embodiment has the filter unit 11a and the limiter unit 11b as described above. Since the entire shape of the breathing filter 11 is assumed to be disposed at the corner of the base housing 1, there is a substantially trapezoidal main body. A hollow is provided in the main body to absorb moisture such as activated carbon or dust. The collection member is filled to constitute the filter part 11a. Further, a limiter portion 11b is formed so as to protrude from the main body portion. One limiter portion 11b is provided at approximately the center position of the bottom surface of the trapezoid of the main body portion of the respiratory filter 11. When the respiratory filter 11 is attached to the corner portion of the base housing 1, each of the limiter portions 11b is interposed between the plurality of discs 2. The magnetic disk 2 protrudes from the outer periphery of the magnetic disk 2 in a plane direction so as to have a predetermined distance (overlap).

  Further, by arranging the limiter portion 11b so as to overlap between the magnetic disks 2, it is possible to regulate and prevent direct collision and deformation between the magnetic disks 2 when the HDD receives an external shock. Become.

  Further, the breathing filter 11 is integrally formed with a filter part 11a and a limiter part 11b, and the filter part 11a is filled with activated carbon or the like for purifying air. By disposing the filter portion 11a so as to overlap with the breathing hole 1a provided in the base casing 1, air entering the inside of the apparatus from the outside of the HDD is purified.

  Further, the limiter unit 11b protrudes from the filter unit 11a toward the outer peripheral edge of the magnetic disk 2 and is disposed so as to overlap the surface of the magnetic disk 2 with a predetermined distance from the magnetic disk 2.

That is, the limiter according to the present embodiment is a component also used as a breathing filter, and prevents the number of components from increasing.
In the present embodiment, the member that is a cylindrical body portion of the respiratory filter 11 and that constitutes a part of the filter portion 11a and the limiter portion 11b that protrudes from the outer periphery of the magnetic disk 2 are made of the same material, for example, a hard resin. And are integrally formed together. However, these two parts may be formed by separate members.

  As described above, the limiter unit 11b for preventing the disk from being damaged due to the contact between the disk and the lamp when the HDD receives an impact or the like when the HDD is not in operation or the contact between the disks enters from the outside of the HDD. By providing it integrally with the breathing filter 11 that purifies the air, it becomes possible to regulate disk deformation without increasing the number of parts in the HDD device.

(Second Embodiment)
Next, the structure of the respiratory filter 11 according to the second embodiment of the present invention will be described in detail with reference to FIG.
The main structure of the respiratory filter 11 of this embodiment is substantially the same as that of the first embodiment described above. That is, it has a structure having a filter part 11a and a limiter part 11b. Since the entire shape of the breathing filter 11 is assumed to be disposed at the corner of the base housing 1, there is a substantially trapezoidal main body. A hollow is provided in the main body to absorb moisture such as activated carbon or dust. The collection member is filled to constitute the filter part 11a.

  Here, the limiter unit according to the second embodiment is provided with one limiter unit 11b substantially at the center of the trapezoid bottom surface of the main body of the breathing filter 11, as in the first embodiment described above. When the filter 11 is attached to the corner of the base housing 1, the magnetic disk 2 overlaps in a plane direction from the outer periphery of the magnetic disk 2 so as to have a predetermined interval between the plurality of disks 2. In addition to the protruding first limiter portion 11b (to overlap), it faces the outermost surface of each magnetic disk 2, has a predetermined distance from each magnetic disk surface, and from the outer periphery of the magnetic disk 2. A second limiter portion 11c protruding in an overlapping manner (so as to overlap) in the surface direction is provided.

  That is, the limiter portions 11b and 11c of the present embodiment are configured in an E block shape, and each of them faces the outer peripheral surface of the magnetic disk 2 with a predetermined interval, so that not only the collision between the magnetic disks 2 but also It has a structure that can prevent the collision between the top magnetic disk and the top cover 12 or the collision between the bottom magnetic disk and the base housing 1.

  As described above, when the HDD is not in operation, when the disk receives a shock from the outside, the disk and the lamp contact each other, or the disks contact each other. The first limiter unit 11b and the second limiter unit 11c for preventing destruction are integrally provided in the breathing filter 11 that purifies air entering from the outside of the HDD, so that the number of parts in the HDD device is not increased. Disc deformation can be regulated.

  In addition, the external shape of the respiratory filter 11 of the present invention is not limited to a trapezoidal shape. Various modifications can be made according to the shape of the HDD. Although the present invention has been described by taking a magnetic disk device as an example, a structure effective for preventing disk destruction of a device equipped with a disk on which information can be written, for example, in the magneto-optical disk drive and CD / DVD drive. And it is applicable to it.

  As described above, according to the embodiment of this structure, by adopting the above-described configuration, the disk is destroyed by contact between the disk and the lamp when the HDD receives an impact or the like when the HDD is not operating, or contact between the disks. It is possible to provide a disk device having a breathing filter that restricts disk deformation without increasing the number of parts.

1 is a perspective view of a magnetic disk device (HDD) according to an embodiment of the present invention. 1 is a front view of an HDD according to an embodiment of the present invention (cover is omitted). Sectional drawing of HDD which concerns on the 1st Embodiment of this invention 1 is a perspective view of a respiratory filter according to a first embodiment of the present invention. Sectional drawing of HDD which concerns on the 2nd Embodiment of this invention

Explanation of symbols

1 ... Base housing 1a ... Breathing hole 2 ... Magnetic disk 4 ... Spindle motor (SPM)
3 ... Clamper 5 ... Magnetic head 6 ... Head actuator 7 ... Voice coil motor (VCM)
8 …… Board unit 9 …… Ramp loading mechanism (lamp)
DESCRIPTION OF SYMBOLS 10 ... Bearing assembly 11 ... Respiration filter 11a ... Filter part 11b ... 1st limiter part 11c ... 2nd limiter part 12 ... Top cover

Claims (5)

One or more discs with rewritable information,
A spindle motor that rotates the disk around a rotation axis;
A head for recording or reproducing information on the disk;
A housing for housing the disk, spindle motor and head;
A breathing filter provided in the casing and having a limiter section that restricts deformation in the direction of the rotation axis generated in the disk due to an impact on the disk device; and a filter section that purifies air entering from outside the casing. A disk device comprising: A lamp that is arranged inside the housing and retracts and holds the head out of the disk when information is not recorded or reproduced on the disk device;
The disk device according to claim 1, wherein the breathing filter is arranged at a position symmetrical to the arrangement position of the lamp with the rotation axis as a center. 2. The disk device according to claim 1, wherein the filter part of the breathing filter is disposed along an outer periphery of the disk, and the limiter part is disposed so as to protrude from the filter part and overlap the surface of the disk. . A plurality of disks are stacked and rotated by the spindle motor,
4. The disk device according to claim 2, wherein the limiter unit is disposed on a surface of the plurality of disks with a predetermined interval. 5. The housing includes a base portion to which a rotation shaft of the spindle motor is fixed;
A cover part that hermetically accommodates the disk, spindle motor and head overlaid on the base part,
The base portion is provided with a breathing hole through which air from the outside of the disk device can enter and exit,
The disk device according to claim 1, wherein the filter portion of the breathing filter is disposed inside the disk device and on the breathing hole.

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