JP2006155823A - Disk apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk apparatus capable of holding a hermetically sealed state in a disk apparatus and determining submergence without an increase in the number of parts. <P>SOLUTION: The disk apparatus of the present invention comprises a rectangular housing having a first shell and a second shell opposed to the first shell, and a disk-shaped recording medium provided in the housing. The first and second shells each have side walls which are opposed to each other and constitute a peripheral portion of the housing. The housing comprises a sealing strip which is wrapped around the side walls of the first and second shells so that the side walls are connected together, and seals gaps between the side walls. The sealing strip has a function of determining a history of an external factor involved in a failure of the apparatus, such as a submergence determining function, an external magnetic field determining function, an impact determining function, a hazardous gas determining function, or the like. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk device, and more particularly to a disk device having a seal member for maintaining an airtight state inside a housing.

Disk devices such as magnetic disk devices and optical disk devices are widely used as external recording devices and image recording devices for computers.
As a disk device, for example, a magnetic disk device generally has a rectangular box-shaped housing. Inside the housing are a magnetic disk as a magnetic recording medium, a spindle motor as a driving means for supporting and rotating the magnetic disk, a plurality of magnetic heads for writing and reading information on the magnetic disk, and these magnetic heads. A head actuator movably supported with respect to the magnetic disk, a voice coil motor for rotating and positioning the head actuator, a substrate unit having a head IC, and the like are housed. A printed circuit board that controls the operation of the spindle motor, the voice coil motor, and the magnetic head is screwed to the outer surface of the housing via a board unit.

2. Description of the Related Art In recent years, a magnetic disk device that is thinly formed into a card shape and can be loaded into, for example, a card slot of a personal computer has been provided (for example, Patent Document 1). The magnetic disk device has been further miniaturized so that it can be used as a recording device for a wider variety of electronic devices, particularly smaller electronic devices.
Japanese Patent Laid-Open No. 2001-210058

  In the thin magnetic disk device as described above, the housing is formed in a thin rectangular parallelepiped shape. Such a housing is parallel to the flat surface of the magnetic disk mounted therein, and is vulnerable to pressure in the thickness direction on the upper and lower surfaces having a large area. Therefore, it is desirable to grip the side surface of the housing during handling. .

  However, as the magnetic disk device is reduced in size, the side surface of the housing is also narrowed, and the number of fingers hung on the side surface portion is reduced when the housing is gripped. At the same time, when the thickness of the casing is reduced, the contact area between the casing side surface and the finger is also reduced. For this reason, it is difficult to stably hold the side surface of the housing, and when carrying it as a portable storage device or as a built-in storage device, in the manufacturing process of incorporating it into other electronic devices, it is possible to slip the The disk unit may be dropped and damaged.

If small magnetic disk units are to be repaired and recycled in the future, when the user uses the portable device after shipment from the manufacturer, whether or not there has been a history of water getting into the device and getting the magnetic disk unit wet? It is expected that work to determine whether or not will occur.

However, there is no means for judging whether or not a small magnetic disk device has been wetted by water, and there is no means that can see the small magnetic disk device itself, and a magnetic disk having such a submergence determination function. The appearance of the device is desired.

Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a disk device capable of submerging determination without increasing the number of parts.

In order to solve the above-described problem, a disk device according to the present invention includes a rectangular housing having a first shell and a second shell provided to face the first shell, and the housing is provided in the housing. A disc-shaped recording medium disposed, wherein the first and second shells have side walls that face each other and form a peripheral edge of the casing, A belt-like seal member wound around the side walls of the first and second shells, connecting the side walls to each other, closing the gap between the side walls, and having a function of judging the history of external elements related to the failure of the device. It is characterized by having.

  According to the present invention, it is possible to provide a disk device capable of submergence determination without increasing the number of parts by adopting the configuration as described above.

Hereinafter, a hard disk drive (hereinafter referred to as HDD) according to an embodiment of the present invention will be described in detail with reference to the drawings.
<First Embodiment>
As shown in FIGS. 1 and 2, the HDD includes a substantially rectangular box-shaped housing 10 in which various members to be described later are housed, and a rectangular control circuit board 12 provided on the outer surface of the housing 10. It is equipped with. The case 10 has a length L of 4 cm or less, for example, 32 mm, a width W of 24 mm, and a thickness T of about 3.3 mm. The thickness T is set according to the number of disks to be stored. The control circuit board 12 is formed to have the same length and width as the housing 10.

  As shown in FIGS. 1, 2, and 4, the housing 10 includes a first shell 10 a and a second shell 10 b that are formed to have substantially the same dimensions. Each of the first and second shells 10a and 10b is made of metal and integrally includes a flat rectangular main surface and a side wall erected on the peripheral edge of the main surface. The first and second shells 10a and 10b are arranged to face each other with their side walls facing each other. A strip-shaped seal member 16 is wound around the outer circumference of the side walls of the first and second shells 10a and 10b constituting the peripheral edge of the housing 10, and the side walls of the shell are connected to each other by the seal member. In addition, the gap between the side walls is sealed. Thereby, the rectangular box-shaped housing | casing 10 is comprised. The peripheral edge of the housing 10 is constituted by the side walls of the first and second shells.

  The main surface of the first shell 10 a forms a rectangular mounting surface 11. The four corners of the housing 10 including the corners of the mounting surface 11 are formed by rounding in an arc shape. Thus, the seal member 16 wound around the peripheral edge of the housing 10 is prevented from being damaged at the corners of the housing 10 and the airtightness due to the floating of the seal member is prevented.

The sealing member 16 is composed of a thin plate material of polyethylene terephthalate, a base material made of aluminum foil or the like, and an adhesive layer formed on the back surface of the base material.
The thickness of the sealing member 16 is about 30 to 200 μm, and the width t is narrower than the thickness T of the casing 10, that is, the width of the peripheral edge of the casing, and is about 2 mm. The seal member 16 has a submergence determination function.

  For example, when the water-based ink is printed in a certain pattern on the surface of the paper and submerged in water, the water-based ink on the printed surface dissolves in the water, and the ink flows on the surface of the paper and blots. It is possible to check for submersion. In the present embodiment, the joint of the first shell 10a and the second shell 10b constituting the housing 10 is present on the side surface of the apparatus, and a structure that maintains the airtight state of the HDD by covering it with the belt-like seal member 16 is provided. I'm taking it. Further, a recess 10c provided in a region where a fixing screw for fixing the second shell 10b to the first shell 10a is attached or a hole 10c for HDD airtightness inspection (not shown) is sealed with a circular seal 16d.

FIG. 6A shows a cross-sectional view of the seal member 16 according to this embodiment. The submergence determination method in this embodiment is demonstrated in detail using Fig.6 (a).
The seal member 16 is affixed to a separator 16b such as polyester. The submerged determination sheet 16a has a width of 1 mm or more in the case of the belt-like seal 16 so that the color change due to submersion can be confirmed visually. Moreover, the thickness of the adhesive 16c is 0.1 mm or less.

  In addition, a recess provided in a region where a fixing screw for fixing the second shell 10b to the first shell 10a is attached, or a hole portion 10c for HDD airtightness inspection (not shown) is sealed here with a circular seal 16d. The diameter of the circular seal 16d used in is preferably 2 mm or more. In this case, since the adhesive 16b is exposed inside the magnetic disk device, it is preferable to use a material having excellent low outgassing properties.

  Further, as shown in FIG. 6 (b), the seal member 16e, in which characters are lifted when the seal member 16 is peeled off, is added to the function of disabling reuse, so that the magnetic disk device having a history of submersion can be separated. It is also possible to prevent unauthorized use such as replacing the submerged label peeled off from the new device.

  As a modification of the present embodiment, as shown in FIG. 7, it is also effective to apply the water-based ink portion of the seal member 16, i.e., the submergence determination function portion, to the entire belt-like seal as in the above embodiment. It is also effective to use a seal member 16f that has been subjected to a submergence determination function only in a part of the belt-like seal, that is, in a part facing the four corners of the HDD.

  As shown in FIGS. 2 and 3, in the housing 10, a plurality of support posts 18 are provided on the periphery of the housing. Each support post 18 has a base end fixed to the inner surface of the first shell 10a, and is erected substantially perpendicular to the inner surface of the first shell. A screw hole is formed in the mounting surface 11 at the position of each support post 18 and extends into the support post.

  In the housing 10, a magnetic disk 20 having a diameter of 1 inch or less, for example, 0.85 inch in diameter, which functions as an information recording medium, a spindle motor 22 as a drive motor for supporting and rotating the magnetic disk, and a magnetic disk A magnetic head 24 for writing and reading information, a carriage 26 for movably supporting the magnetic head with respect to the magnetic disk 20, a voice coil motor (hereinafter referred to as VCM) 28 for rotating and positioning the carriage, and a magnetic head A substrate unit 34 having a ramp load mechanism 30 for unloading and holding the magnetic head at a position away from the magnetic disk, a latch mechanism for holding the carriage in the retracted position, and a head IC when moved to the peripheral edge of the magnetic disk. Etc. are stored.

  The spindle motor 22 is attached to the first shell 10a. The spindle motor 22 has a pivot 36, which is fixed to the inner surface of the first shell 10a, and is erected substantially perpendicular to the inner surface. The extension end of the pivot 36 is screwed to the second shell by a fixing screw 37 screwed from the outside of the second shell 10b. Thereby, the pivot 36 is supported at both ends by the first and second shells 10a and 10b.

  A rotor is rotatably supported on the pivot 36 via a bearing (not shown). The end of the rotor on the second shell 10b side constitutes a cylindrical hub 43, to which the magnetic disk 20 is coaxially fitted. An annular clamp ring 44 is fitted to the end of the hub 43 to hold the circumferential edge of the magnetic disk 20. As a result, the magnetic disk 20 is fixed to the rotor and is supported so as to be rotatable integrally with the rotor.

  An annular permanent magnet (not shown) is fixed to the end of the rotor on the first shell 10a side, and is positioned coaxially with the rotor. The spindle motor 22 has a stator core attached to the first shell 10a and a plurality of coils wound around the stator core, and the stator core and the coils are disposed with a gap outside the permanent magnet.

  The carriage 26 constituting the head actuator includes a bearing assembly 52 fixed on the inner surface of the first shell 10a. The bearing assembly 52 includes a pivot 53 that is erected perpendicular to the inner surface of the first shell 10a, and a cylindrical hub 54 that is rotatably supported by the pivot 53 via a pair of bearings. ing. The extending end of the pivot 53 is screwed to the second shell by a fixing screw 56 screwed from the outside of the second shell 10b. Thus, the pivot 53 is supported at both ends by the first and second shells 10a and 10b. The bearing assembly 52 that functions as a bearing portion is arranged in the longitudinal direction of the housing 10 with respect to the spindle motor 22.

  The carriage 26 includes an arm 58 extending from the hub 54, an elongated plate-like suspension 60 extending from the tip of the arm, and a support frame 62 extending from the hub 54 in the direction opposite to the arm. The magnetic head 24 is supported on the extended end of the suspension 60 via a gimbal portion (not shown). A predetermined head load is applied to the magnetic head 24 toward the surface of the magnetic disk 20 by the spring force of the suspension 60. A voice coil 64 constituting the VCM 28 is integrally fixed to the support frame 62.

  The VCM 28 for rotating the carriage 26 around the bearing assembly 52 is fixed on the first shell 10a and opposed to each other with a gap therebetween, and fixed to the inner surface of one yoke and opposed to the voice coil. And a magnet (not shown). By energizing the voice coil 64, the carriage 26 rotates between a retracted position shown in FIG. 3 and an operating position located on the surface of the magnetic disk 20, and the magnetic head 24 moves to a desired track on the magnetic disk 20. Positioned above. The latch mechanism 32 fixed to the first shell 10a latches the carriage 26 moved to the retracted position, and prevents the carriage 26 from moving from the retracted position to the operating position when the HDD receives an external force such as an impact. .

  The ramp loading mechanism 30 includes a ramp member 70 that is fixed to the inner surface of the first shell 10 a and faces the peripheral edge of the magnetic disk 20, and a tab 72 that extends from the tip of the suspension 60 and functions as an engaging member. . The ramp member 70 is formed of synthetic resin or the like, and has a ramp surface 73 with which the tab 72 can be engaged. When the carriage 26 rotates from the inner periphery of the magnetic disk 20 to the retracted position on the outer periphery of the magnetic disk 20, the tab 72 engages with the ramp surface 73 of the ramp member 70, and then is lifted by the ramp surface inclination. 24 unload operations are performed. When the carriage 26 is rotated to the retracted position, the tab 72 is supported on the ramp surface 73 of the ramp member 70 and the magnetic head 24 is held in a state of being separated from the surface of the magnetic disk 20.

  The board unit 34 has a main body 34a formed of a flexible printed circuit board, and the main body 34a is fixed to the inner surface of the first shell 10a. Electronic components such as a head IC and a head amplifier are mounted on the main body 34a. The board unit 34 has a main flexible printed circuit board (hereinafter referred to as main FPC) 34b extending from the main body 34a. The extended end of the main FPC 34 b is connected to the vicinity of the bearing assembly 52 of the carriage 26 and is further electrically connected to the magnetic head 24 via a cable (not shown) provided on the arm 58 and the suspension 60. A connector 34 c for connecting to the control circuit board 12 is mounted on the bottom surface of the main body of the board unit 34. The connector 34c is exposed to the mounting surface 11 of the first shell through an opening formed in the first shell 10a.

  As shown in FIG. 2, the control circuit board 12 made of a printed circuit board has a rectangular shape having a length and width substantially equal to the mounting surface 11 of the housing 10. On the mounting surface 11 of the housing 10, a circular convex portion 70a corresponding to the spindle motor 22 and a circular convex portion 70b corresponding to the bearing assembly 52 are formed. The control circuit board 12 is formed with circular openings 72a and 72b corresponding to the convex portions 70a and 70b, respectively. The four corners of the control circuit board 12 are notched obliquely, for example, at an angle of 45 degrees with respect to each side to form a notch 77. A plurality of electronic components 74 and connectors 71 are mounted on the inner surface of the control circuit board 12, that is, on the surface facing the housing 10.

  The control circuit board 12 is disposed so as to overlap the mounting surface 11 of the housing 10, and is screwed to the first shell 10a with a plurality of screws. At this time, the control circuit board 12 is arranged with four sides aligned with the four sides of the mounting surface 11, that is, with the four sides of the mounting surface 11 coinciding. The convex portions 70a and 70b formed on the mounting surface 11 are disposed in the openings 72a and 72b of the control circuit board 12, respectively. The connector 71 mounted on the control circuit board 12 is connected to the connector of the board unit 34.

  The notches 77 formed at the four corners of the control circuit board 12 are positioned at the four corners of the mounting surface 11, respectively. Thereby, the four corners of the mounting surface 11 are exposed to the outside without being covered by the control circuit board 12. The corners of the housing 10 including the exposed four corners of the mounting surface 11 constitute a holding portion 78 for holding the housing without contacting the control circuit board 12.

  The above-described portable HDD formed in a card shape can be used as a recording device for various electronic devices such as a mobile phone, a digital camera, a video camera, and a personal digital assistant (PDA). In addition, it can be used as a built-in storage device for small electronic devices because of its small size.

  According to the HDD configured as described above, the side wall portions of the first and second shells 10a and 10b constituting the housing 10 are connected to each other by the seal member 16, and the gap between the side walls is the seal member. It is blocked by For example, when water-based ink is printed on these sealing members 16 in a certain pattern on the paper surface and submerged, the water-based ink on the printing surface dissolves in water, and the ink flows on the paper surface and blots. Can be submerged. That is, by adopting the configuration as described above, which is the present embodiment, it is possible to provide a disk device capable of determining submersion without increasing the number of parts.

  Next, another embodiment of the present invention will be described with reference to FIGS. As another embodiment of the present invention, not only the submergence determination function described in the first embodiment but also (1) an external magnetic field determination function, (2) an impact determination function, (3) a harmful gas determination function, and the like. The seal member 16 may be provided with a history determination function for external elements related to the failure of the apparatus.

<Second Embodiment>
FIG. 8 is a sectional view showing the structure of the seal member 116 according to the second embodiment of the present invention. In the second embodiment, the seal member 116 has an external magnetic field determination function.
That is, the seal member 116 according to the present embodiment constitutes an external magnetic field determination sheet, and as shown in FIG. 8, for example, the magnet particles 116 a separately applied in two colors of white and black are translucent or When encapsulated between two transparent sheets 116b and receiving a magnetic force 116c from the outside, the magnetic particles 116a are rotated, so that the surface of the sheet member 116 is displayed in a state where the contrast is different from the other parts. Thereby, the HDD has a structure in which a history of receiving an external magnetic field remains.

<Third Embodiment>
FIG. 9 is a cross-sectional view showing the structure of a seal member 216 according to the third embodiment of the present invention. In the third embodiment, the seal member 216 has an impact determination function.
That is, the sealing member 216 according to the present embodiment is formed by laminating a color developing layer 216b and a microcapsule 216c containing a color former 216e between two layers of base paper 216a as shown in FIG. When an impact 216d is applied to the seal member 216, the shell of the microcapsule 216c is broken, and the color former 216e in the microcapsule 216c oozes out and reacts with the color developing layer 216b to generate a dye 216f. As a result, the HDD has received a shock history.

<Fourth Embodiment>
In the fourth embodiment, the seal member has a harmful gas determination function.
The seal member according to the present embodiment uses a seal that changes color in response to an acidic gas or a basic gas such as litmus paper, so that a history remains when the HDD is left in a harmful gas. It has become.

  According to the disk device configured as described above, by adopting the configuration as described above, it is possible to provide a disk device capable of determining submersion without increasing the number of parts.

The perspective view of HDD which concerns on embodiment of this invention 1 is an exploded perspective view of an HDD according to an embodiment of the present invention. 1 is a plan view showing a housing and an internal structure of an HDD according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the HDD taken along line AA in FIG. 1. The figure which shows the attachment state of the sealing member which concerns on the 1st Embodiment of this invention. Sectional drawing which shows the structure of the sealing member which concerns on the 1st Embodiment of this invention. The figure which shows the attachment state of the sealing member which concerns on the modification of the 1st Embodiment of this invention. Sectional drawing which shows the structure of the sealing member which concerns on the 2nd Embodiment of this invention. Sectional drawing which shows the structure of the sealing member which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Case 10a ... 1st shell 10b ... 2nd shell 10c ... Indentation 12 ... Control circuit board 16 ... Seal member 16a ... Submerged judgment seal 16b ... Separator 16c ... Adhesive material 16d ... Circular seal 16f ... Submerged judgment function in part Seal 16e with seals on which seals 17 emerge when they are peeled off ... Through hole 18 ... Support post 20 ... Magnetic disk 22 ... Spindle motor 24 ... Magnetic head 26 ... Carriage 28 ... VCM
30 ... Lamp load mechanism 116 ... Sealing member 116a having an external magnetic field determining function ... Magnetic particles 116b ... Sheet 116c ... External magnetic force 216 ... Sealing member 216a having an impact determining function ... Base paper 216b ... Color developing layer 216c ... Microcapsule 216d ... Impact 216e ... Color former 216f ... Dye

Claims (9)

A rectangular housing having a first shell and a second shell provided opposite to the first shell;
A disc-shaped recording medium disposed in the housing,
The first and second shells have side walls that face each other and that form a peripheral edge of the housing,
The casing is wound around the side walls of the first and second shells, and the side walls are connected to each other, and the gap between the side walls is closed, and the history determination function of external elements related to the failure of the apparatus is provided. A disk device comprising a belt-like seal member.   The disk device according to claim 1, wherein the seal member has a width narrower than a width of a peripheral edge portion of the housing.   The disk device according to claim 1, wherein the seal member is a submerged band-shaped body obtained by printing a water-resistant substrate with water-soluble ink. The seal member has a submerged function in which a water-resistant substrate is printed with water-soluble ink only in a region facing a corner portion of the casing when the gap between the side walls is closed. The disk device according to claim 3.   The disk device according to claim 1, wherein the seal member has an external magnetic field determination function.   The disk device according to claim 1, wherein the seal member has an impact determination function.   The disk device according to claim 1, wherein the seal member has a toxic gas determination function.   2. The disk apparatus according to claim 1, wherein the seal member has a function of leaving a history of peeling when characters are lifted when peeled off from the side wall of the housing.   The said sealing member is adhere | attached on the said housing | casing side wall through the adhesive material, The said adhesive material is a material excellent in the low outgas property, and thickness is 0.1 mm or less, It is characterized by the above-mentioned. The disk device described in 1.

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