Magnetic recording and reproducing apparatus

Abstract

Provided is a magnetic recording and reproducing apparatus that reduces contamination. A magnetic recording / reproducing apparatus according to an embodiment includes: a housing that houses a magnetic recording medium and a magnetic head that records or reproduces magnetic information on the magnetic recording medium; and the synthetic adsorption material is arranged in the shell and contains a polystyrene-divinyl benzene copolymer.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2023-147683 (filing date: September 12, 2023). The present application incorporates the entire contents of the basic application by reference. Technical Field

[0002] An embodiment of the present invention relates to a magnetic recording and reproducing device. Background Art

[0003] Contamination of the medium and the head has become a cause of malfunction in the magnetic recording and reproducing device. Therefore, activated carbon has been installed in the breathing filter to adsorb organic exhaust (out-gas). However, the breathing filter is far away from the head and the medium, and the gas adsorption efficiency near the medium and the head is poor. In addition, activated carbon is prone to generate particles, and its use is limited from a processing perspective. Although there is a technology that replaces activated carbon and seals graphene particles in a container and installs it in the HDD to make it adsorb gas, the improvement in processability and particle generation is not sufficient. Summary of the invention

[0004] An embodiment of the present invention provides a magnetic recording and reproducing device with reduced contamination.

[0005] A magnetic recording and reproducing device according to an embodiment includes: a housing that accommodates a magnetic recording medium and a magnetic head that records or reproduces magnetic information on the magnetic recording medium; and a synthetic adsorbent material that is disposed in the housing and contains a polystyrene-divinylbenzene copolymer. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is an exploded perspective view showing a base and a top cover of a hard disk drive (HDD) according to the embodiment.

[0007] Figure 2 It is a top view of the HDD with its cover removed.

[0008] Figure 3 is a perspective view showing a portion of a head stack assembly (HSA) of a HDD.

[0009] Figure 4 It is a top view of the HDD involved in Example 1-2.

[0010] Figure 5 is a cross-sectional view of the spoiler.

[0011] Figure 6 This is an exploded perspective view of the HDD involved in Example 2-1.

[0012] Figure 7It is a top view of the HDD involved in Example 2-1 with the cover removed.

[0013] Figure 8 is along Figure 7 Cross-section diagram along line AA.

[0014] Fig. 9 It is a top view showing an example of a synthetic adsorbent filter.

[0015] Fig.10 It is a plan view showing another example of the synthetic adsorbent filter.

[0016] Description of symbols

[0017] 1-1, 1-2, 1-3 synthetic adsorbent material, 10 shell, 11b inner stopper, 15a, 15b gap, 17 magnetic head, 18 magnetic recording medium, 22 head stack assembly, 23, 23-1 plate, 24-1 VCM sleeve, 70, 70-1, 70-2 spoiler, 100-1, 100-2, 100-3 magnetic recording and reproducing device, 120-1 desiccant housing (housing case). DETAILED DESCRIPTION

[0018] A magnetic recording and reproducing device according to an embodiment includes: a housing that accommodates a magnetic recording medium and a magnetic head that records or reproduces magnetic information on the magnetic recording medium; and a synthetic adsorbent material that is disposed in the housing and contains a polystyrene-divinylbenzene copolymer.

[0019] According to the embodiment, by using a synthetic adsorbent containing a polystyrene-divinylbenzene copolymer, it is possible to adsorb organic gas without generating dust such as particles, thereby reducing pollution.

[0020] The synthetic adsorbent material can be applied to at least a portion of the components within the housing. Alternatively, the synthetic adsorbent material can be disposed in a gap between the magnetic recording medium and the housing.

[0021] The "application" mentioned here includes adopting the following configurations.

[0022] For example, a structure in which a component is formed using a synthetic adsorbent material, or a structure in which a component is formed using a mixed material containing a synthetic adsorbent material and other materials.

[0023] Furthermore, for example, the component can be configured to have a component body and a film disposed on the component body and containing a synthetic adsorbent. As the film, a coating film of the synthetic adsorbent can be used. An adhesive layer can also be disposed between the component body and the film. For example, an adhesive layer can be laminated on a sheet of synthetic adsorbent to produce a synthetic adsorbent adsorption sheet, and the synthetic adsorbent can be attached to the component.

[0024] As components, a head stack assembly (HSA), an inner stopper, a VCM sleeve, a spoiler, or a desiccant housing may be cited.

[0025] The synthetic adsorbent material can be disposed on at least a portion of the head stack assembly, such as a side. The synthetic adsorbent material can be disposed on at least a portion of the spoiler, such as a side. The synthetic adsorbent material can be disposed on at least a portion of the desiccant housing, the inner stopper, and the VCM sleeve, such as an outer surface. In addition, the spoiler, the desiccant housing, the inner stopper, and the VCM sleeve can each be formed of a synthetic adsorbent material or a mixed material including the synthetic adsorbent material and other materials.

[0026] The synthetic adsorbent material provided in the gap between the magnetic recording medium and the housing can be formed as a plate. The plate can have a mesh-like open-pore structure, such as a grid-like structure or a honeycomb structure.

[0027] The synthetic adsorption materials used can have functional groups added to the surface as desired.

[0028] Hereinafter, examples will be shown and the implementation will be described in detail.

[0029] [Example]

[0030] (Example 1)

[0031] Embodiment 1 shows a case where a synthetic adsorbent sheet is attached to a component or a synthetic adsorbent layer is applied to the component as an example of applying the synthetic adsorbent to a component in a housing.

[0032] The synthetic adsorbent can be installed at a location perpendicular to the direction of the airflow during operation or at a location where the airflow changes. The probability of the synthetic adsorbent colliding with the organic gas increases, and the adsorption efficiency can be expected to increase.

[0033] The synthetic adsorbent material can be installed by using an adhesive to stick a synthetic resin in a sheet form, or by applying it in a liquid state and curing it. There are several points to note about the adhesive. For example, the side of the HSA is formed of aluminum with a high thermal expansion coefficient. If a thermosetting adhesive is used, the adsorbent material may be damaged due to thermal stress during bonding. Therefore, it is preferred to use a UV curing adhesive as an adhesive. However, depending on the material of the HSA and the heat resistance temperature of the adsorbent material, a thermosetting resin can be used.

[0034] In addition, the adhesive can be adjusted to not contain components with poor compatibility by synthesizing the adsorbent material. Since resins are generally weak in resistance to organic solvents, the adhesive can be cured immediately after application without leaving it for a long time. In addition, even when a material having an easily soluble adhesive component is selected, a stronger bond can be achieved by melting the grounding portion to a degree that the pore structure is not damaged.

[0035] Hereinafter, embodiments will be described with reference to the drawings.

[0036] In addition, the disclosure is only an example, and solutions that can be easily thought of by those skilled in the art while maintaining the main purpose of the invention are of course also included in the scope of the present invention. In addition, in order to make the description clearer, the drawings sometimes schematically show the width, thickness, shape, etc. of each part compared with the actual method, but this is only an example and does not limit the interpretation of the present invention. In addition, in this specification and each drawing, the same reference numerals are marked for the same elements as those described in the drawings that have already appeared, and the detailed description is sometimes appropriately omitted.

[0037] A hard disk drive (HDD) according to the first embodiment will be described in detail as a disk device.

[0038] Example 1-1

[0039] Example 1-1 shows an example in which HSA is used as a member to which a synthetic adsorbent is applied.

[0040] Figure 1 is an exploded perspective view of the HDD according to Example 1-1 with the cover removed. Figure 2 This is a plan view of the HDD according to Example 1-1 with the cover removed.

[0041] like Figure 1 As shown, HDD100-1 has a rectangular housing 10. The housing 10 has a rectangular box-shaped base 12 with an open upper surface and a cover (top cover) 14. The base 12 has a rectangular bottom wall 12a and a side wall 12b erected along the periphery of the bottom wall, and is integrally formed of, for example, aluminum. The cover 14 is formed into a rectangular plate shape, for example, from stainless steel. The cover 14 is screwed to the side wall 12b of the base 12 by a plurality of screws 13, and the upper opening of the base 12 is airtightly closed.

[0042] like Figure 1 and Figure 2As shown, a plurality of, for example, 10 magnetic disks 18 as disk-shaped recording media and a spindle motor 19 that supports and rotates the magnetic disks 18 are provided in the housing 10. The spindle motor 19 is disposed on the bottom wall 12a. Each magnetic disk 18 is formed, for example, in the shape of a disk with a diameter of 95 mm (3.5 inches), and has a substrate formed of a non-magnetic body, such as glass, and a magnetic recording layer formed on the upper surface (first surface) and the lower surface (second surface) of the substrate. Each magnetic disk 18 is coaxially fitted to a hub of the spindle motor 19 described later, and is clamped by a clamp spring 20. Thus, the magnetic disk 18 is supported in a state of being located parallel to the bottom wall 12a of the base 12. The plurality of magnetic disks 18 are rotated in the rotation direction B at a predetermined rotation speed by the spindle motor 19. In addition, the number of magnetic disks 18 mounted is not limited to 10, and may be 9 or less, or more than 10.

[0043] In the housing 10, a plurality of magnetic heads 17 for recording and reproducing information on the magnetic disk 18 and an actuator assembly 22 as an HSA for supporting the magnetic heads 17 so as to be movable relative to the magnetic disk 18 are provided. In addition, in the housing 10, a voice coil motor (VCM) 24 for rotating and positioning the actuator assembly 22, a ramp loading mechanism 25 for holding the magnetic head 17 at an unloading position away from the magnetic disk 18 when the magnetic head 17 moves to the outermost periphery of the magnetic disk 18, a substrate unit (FPC unit) 21 on which electronic components such as a conversion connector are mounted, and a spoiler 70 made of a synthetic resin such as polycarbonate or metal are provided.

[0044] A printed circuit board 27 is screwed onto the outer surface of the bottom wall 12a of the base 12. The printed circuit board constitutes a control unit that controls the operation of the spindle motor 19 and controls the operations of the VCM 24 and the magnetic head 17 via the board unit 21.

[0045] Figure 3 is a perspective view of a portion of the actuator assembly 22 as viewed from the loading position.

[0046] As shown in the figure, the actuator assembly 22 includes an actuator block 29 having a through hole 26 , a bearing unit (unit bearing) 28 provided in the through hole 26 , and a plurality of, for example, eleven arms 32 extending from the actuator block 29 .

[0047] In this embodiment, the actuator block 29 and the 11 arms 32 are integrally formed of aluminum or the like to form a so-called E-block. The arm 32 is formed, for example, in the shape of an elongated flat plate, and extends from the actuator block 29 in a direction perpendicular to a support shaft (not shown) inserted into the through hole 26. The 11 arms 32 are arranged in parallel with a gap therebetween. The suspension assembly 30 can be mounted on the extension end 32a of each arm 32.

[0048] The E block has a support frame 33 extending from the actuator block 29 in the direction opposite to the arm 32, and a voice coil 39 constituting a part of the VCM 24 is supported by the support frame 33. Figure 1 As shown, the voice coil 39 is located between a pair of yokes 37 , one of which is fixed to the base 12 , and constitutes the VCM 24 together with these yokes 37 and a magnet fixed to any of the yokes.

[0049] On the side surface 32-1 on the upstream side with respect to the rotation direction B of the magnetic disk 18 among the side surfaces of each arm 32 except the extension end 32a, there is provided a coating containing a synthetic adsorbent material as the synthetic adsorbent material 1-1. The synthetic adsorbent material 1-1 can be provided by sticking a synthetic adsorbent material adsorption sheet on the side surface 32-1 of the arm 32 as the component body, or by coating the synthetic adsorbent material. Thus, it is possible to adsorb organic gas floating on the rotating magnetic disk 18 by the synthetic adsorbent material 1-1 on the side surface 32-1 on the upstream side. In addition, the installation position of the synthetic adsorbent material 1-1 is not limited thereto, and the synthetic adsorbent material 1-1 can be provided, for example, on the side surface on the downstream side, or on both the side surface 32-1 on the upstream side and the side surface on the downstream side.

[0050] The polystyrene-divinylbenzene copolymer used for synthesizing the adsorbent is a porous body. For example, it can have micropores with a pore diameter of 15 angstroms to macropores with a pore diameter of 80 angstroms, a pore volume of 0.1 to 0.8 (ml / g), a pore volume of 500 to 1500 (m 2 / g) and a water content of 35 to 50 (%). Examples of such polystyrene-divinylbenzene copolymers include PuroSorb (Purolite) and Macronet (registered trademark) MN270 (Purolite).

[0051] Polystyrene-divinylbenzene without functional groups is effective for adsorption of siloxane.

[0052] Known from Figure 3 Siloxane is generated by the adhesive for attaching the ACB damper 35 near the synthetic adsorbent 1-1. By providing the synthetic adsorbent 1-1 that easily adsorbs siloxane near the siloxane generation source, it is expected that the siloxane gas in the HDD will be reduced.

[0053] As described above, according to the embodiment 1-1, by using the synthetic adsorbent 1-1, it is possible to adsorb the exhaust gas without generating dust such as particles, thereby reducing pollution.

[0054] Example 1-2

[0055] Embodiment 1-2 shows an example of using a spoiler as a member to which the synthetic adsorbent material is applied.

[0056] Next, the spoiler 70 - 1 of the HDD will be described.

[0057] Figure 4 It is a top view of the HDD involved in Example 1-2.

[0058] As shown in the figure, the HDD 100-2 has a synthetic resin or metal spoiler 70-1 having a synthetic adsorbent 1-2 as a film containing a synthetic adsorbent on the side of a blade 74 as a part of the component body instead of the spoiler 70, and has the same Figure 1 and Figure 2 Same composition.

[0059] Figure 5 It is a cross-sectional view showing a part of a spoiler and a magnetic disk.

[0060] like Figure 4 and Figure 5 As shown, the spoiler 70-1 comprises: a molded body having a main body 72, a support sleeve 73 provided on the main body 72, and a plurality of blades 74 extending substantially vertically from the main body 72, and being integrally formed of synthetic resin or metal; and a synthetic adsorbent material 1-2 further provided on the side of the blade 74. The synthetic adsorbent material 1-2 can be provided by pasting a synthetic adsorbent adsorption sheet or applying the synthetic adsorbent. Figure 4 As shown, the spoiler 70-1 is substantially vertically mounted on the bottom wall 12a of the base 12 by mounting a support sleeve 73 on a pivot disposed upright on the bottom wall 12a of the base 12. The spoiler 70-1 is disposed near the outer periphery of the disk 18 on the upstream side of the actuator assembly 22 with respect to the rotation direction B of the disk 18.

[0061] like Figure 5 As shown, a plurality of, for example, 11 blades 74 are arranged approximately parallel to each other at predetermined intervals. Except for the uppermost blade 74a and the lowermost blade not shown, the other nine blades 74 extend between the two movable magnetic disks 18 and face the outer periphery of the magnetic disks 18 with a gap therebetween. The uppermost blade 74a faces the upper surface of the uppermost magnetic disk 18 with a gap therebetween. Similarly, the lowermost blade faces the lower surface of the lowermost magnetic disk 18 with a gap therebetween.

[0062] Each blade 74 is formed so that the thickness gradually decreases from the base end toward the front end. The blades 74 of the spoiler 70 rectify the wind generated on the surface of the magnetic disk 18, reducing the wind interference to the actuator assembly 22. As a result, the vibration of the actuator assembly 22 can be suppressed, and the head positioning accuracy can be improved. In addition, the airflow changes greatly near the spoiler, and the effect of adsorbing the gas before it is attached to the magnetic disk 18 by the synthetic adsorbent material 1-2 can be expected. It is believed that gas adsorption is easy to perform in a place where the airflow changes greatly.

[0063] As described above, according to Embodiment 1-2, by using the synthetic adsorbent 1-2, exhaust gas can be adsorbed without generating dust such as particles, and pollution can be reduced efficiently.

[0064] (Example 2)

[0065] Embodiment 2 shows a case where the synthetic adsorbent material is formed into a component shape and disposed in the HDD.

[0066] Example 2-1

[0067] Example 2-1 shows the case where the components inside the HDD themselves are molded with synthetic adsorbent resin.

[0068] Figure 6 is an exploded perspective view of the HDD according to Example 2-1 with the cover removed. Figure 7 It is a top view of the HDD involved in Example 2-1 with the cover removed. Figure 8 is along Figure 7 The cross-sectional view of the AA line shows Figure 7 A cross-sectional view around the threaded member 24-2.

[0069] The materials of the components in the HDD 100 - 3 can be arbitrarily changed to synthetic adsorbents. Since synthetic adsorbents do not generate dust like activated carbon, synthetic adsorbents containing polystyrene-divinylbenzene copolymers can be directly installed without packaging. Figure 6 The invention has the following features except that a spoiler 70-2 formed of a synthetic adsorbent material is provided instead of the spoiler 70 and a desiccant housing 100-1 is provided. Figure 1 Same composition. Figure 7 The invention has the following features, except that a spoiler 70-2 formed of a synthetic adsorbent material is provided in place of the spoiler 70, an inner stopper 11b formed of a synthetic adsorbent material, a VCM 24 fixed by a screw 24-2 having a VCM sleeve 24-1 formed of a synthetic adsorbent material and a screw 24-7 having a VCM sleeve 24-6 formed of a synthetic adsorbent material, a desiccant housing 120-1 formed of a synthetic adsorbent material, and an adsorption filter 23-1 formed of a synthetic adsorbent material. Figure 2 Same composition.

[0070] like Figure 6 , Figure 7 As shown, the inner stopper 11b can be formed of a synthetic adsorbent material and can be provided in a columnar shape on the bottom wall 12a around the VCM 24. When the inner stopper 11b is used, when the head is moved toward the inner periphery of the magnetic disk 18, the impact of the HAS colliding with the column of the VCM can be suppressed when the HAS moves.

[0071] like Figure 8 As shown, the VCM sleeve 24-1 is formed using a synthetic adsorbent material and is a cylindrical component that is set to cover the screw 24-2 that fixes the VCM 24 to the substrate 12. When the VCM sleeve 24-1 is set, particles from the screw 24-2 are difficult to diffuse into the HDD 101. In the figure, 24-3 shows the bottom surface of the VCM, 24-4 shows the upper surface of the VCM, and 24-5 shows a cover set on the upper surface 24-4 of the VCM. The VCM sleeve 24-6 also has the same structure as the VCM sleeve 24-1.

[0072] like Figure 7 As shown, the spoiler 70-2 has a blade 74-1, which has the same structure as the synthetic adsorbent material 1-3 except that the whole is formed of the synthetic adsorbent material 1-3. Figure 4 and Figure 5 The spoiler 70 - 1 shown is constructed similarly.

[0073] The desiccant housing 120-1 is provided at Figure 6 The box body of the desiccant 120 of the breathing hole 110 of the cover 14 is formed of a synthetic adsorbent material. The desiccant 120 is provided to adsorb exhaust gas and reduce humidity. An adsorbent not shown in the figure can be placed in the housing 120-1. As the adsorbent, for example, activated carbon, silica gel, etc. can be used. By making the desiccant housing 120-1 itself into a synthetic adsorbent, it is expected that exhaust gas can be further reduced.

[0074] Furthermore, when the synthetic adsorbent is molded into a component shape, strength and elasticity may become a problem depending on the component, but these can be adjusted by mixing the synthetic adsorbent with other resins.

[0075] As the components to which the synthetic adsorbent can be applied, the inner stopper, the VCM sleeve, the spoiler, and the desiccant housing are listed, but it is sufficient to apply the synthetic adsorbent to at least one of these components. The synthetic adsorbent can also be applied to other components besides these components.

[0076] As described above, according to Example 2-1, by using a synthetic adsorbent, exhaust gas can be adsorbed without generating dust such as particles, thereby reducing pollution.

[0077] Example 2-2

[0078] Example 2-2 shows a case where a synthetic adsorbent material formed into a plate shape is provided as an adsorption filter in the air flow passage in the HDD.

[0079] like Figure 7 As shown, the synthetic adsorbent plate 23 formed of the synthetic adsorbent can be installed in the airflow path around the magnetic disk 18 in the HDD, such as the airflow path 15a. In addition, the synthetic adsorbent plate 23 can be installed at any position in the HDD, such as the airflow path 15b, the HSA 22, or the airflow path around the spoiler 70-2, instead of the airflow path 15a. The synthetic adsorbent plate 23 can be processed into various shapes.

[0080] Fig. 9 and Fig.10 This is a top view of the synthetic adsorbent material plate used in Example 2-2.

[0081] The synthetic adsorbent sheet 23 can be processed into a sheet having an open hole shape, for example Fig. 9 Alternatively, it can also be processed into a grid shape such as Fig.10 The honeycomb structure plate 23-1 shown. Since the adsorption rate when the exhaust gas passes through increases as the thickness of the plate increases, the shape and thickness of the openings can be arbitrarily adjusted within a range that does not hinder the airflow. By placing it in a position where there is airflow and it becomes a gas channel, gas adsorption can be expected. In addition, as long as it does not hinder the airflow and is a position where the exhaust gas collides, it is not necessary to open a hole. When enclosing activated carbon, it is necessary to pack it in a box body, but since the synthetic adsorbent used in the embodiment does not have the risk of generating dust, it can be directly set in the HDD. Therefore, by using a synthetic adsorbent material plate formed by a synthetic adsorbent material, the volume of the box body of the adsorption filter enclosed with activated carbon can be reduced by the thickness of the box body to achieve miniaturization. In addition, the exhaust gas can be adsorbed without generating dust such as particles, which can reduce pollution.

[0082] Example 3

[0083] Example 3 shows that the adsorption characteristics can be selected by the presence or absence of functional groups in the polystyrene-divinylbenzene copolymer.

[0084] Polystyrene-divinylbenzene copolymers without functional groups are effective for adsorption of siloxane.

[0085] Known from Figure 3 The adhesive for attaching the ACB damper 35 to the surface 32-2 of the arm 32 parallel to the magnetic disk 18 near the synthetic adsorbent 1-1 generates siloxane. According to the embodiment, by providing the synthetic adsorbent 1-1 that easily adsorbs siloxane near the siloxane generation source, it is expected that the siloxane gas in the HDD can be reduced.

[0086] The synthetic adsorbent material can also be made into an adsorbent material specialized for adsorbing specific components by adding functional groups. For example, if it is desired to adsorb hydrophilic gases, an -OH group can be added. In addition, synthetic adsorbent materials with weakly basic anionic functional groups or strongly acidic cationic functional groups can also be selected.

[0087] As described above, according to the third embodiment, by using the synthetic adsorbent material, it is possible to adsorb the exhaust gas without generating dust such as particles, thereby reducing pollution.

[0088] Several embodiments of the present invention have been described, but these embodiments are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and / or their variations are included in the scope and purpose of the invention, and are included in the invention described in the claims and the scope of their equivalents.

Claims

1. A magnetic recording and reproducing device, comprising: a housing that accommodates a magnetic recording medium and a magnetic head that records magnetic information on or reproduces magnetic information from the magnetic recording medium; and A synthetic adsorbent material comprising a polystyrene-divinylbenzene copolymer is disposed within the housing.

2. The magnetic recording and reproducing device according to claim 1, The synthetic adsorbent material is applied to at least a portion of the components within the housing.

3. The magnetic recording and reproducing device according to claim 2, The component is formed using the synthetic adsorbent material.

4. The magnetic recording and reproducing device according to claim 2, The component is formed using a mixed material containing the synthetic adsorbent material.

5. The magnetic recording and reproducing device according to claim 2, The component includes a component body and a film provided on the component body and containing the synthetic adsorbent.

6. The magnetic recording and reproducing device according to claim 5, The film is a coating film of the synthetic adsorbent material.

7. The magnetic recording and reproducing device according to claim 5, An adhesive layer is further provided between the component body and the film.

8. The magnetic recording and reproducing device according to claim 2, The component is a head stack assembly, and the synthetic adsorbent material is disposed on at least a portion of a side surface of the head stack assembly.

9. The magnetic recording and reproducing device according to claim 2, The component is at least one of an inner stopper, a VCM sleeve, a spoiler, and a desiccant housing.

10. The magnetic recording and reproducing device according to claim 1, The synthetic adsorption material is disposed in a gap between the magnetic recording medium and the housing.

11. The magnetic recording and reproducing device according to claim 1, The synthetic adsorbent material is a sheet.

12. The magnetic recording and reproducing device according to claim 11, The plate has a mesh-like open-pore structure.

13. The magnetic recording and reproducing device according to claim 1, The synthetic adsorption material has functional groups attached to the surface.

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