Magnetic recording and reproducing device and method of manufacturing the same

Abstract

The present invention relates to a magnetic recording and reproducing device and a method for manufacturing the same. One embodiment aims to adsorb contaminated gas within the magnetic recording and reproducing device by incorporating an irreversible adsorption member within the housing. The magnetic recording and reproducing device and its manufacturing method of this embodiment include an irreversible adsorption member within a sealed housing for the magnetic recording and reproducing device.

Description

[0001] This application claims the benefit of priority based on Japanese Patent Application No. 2021-086957 (filing date: May 24, 2021), the entire contents of which are incorporated herein by reference. Technical Field

[0002] Embodiments of the present invention relate to a magnetic recording and reproducing device and a method for manufacturing the same. Background Art

[0003] Traditionally, porous materials such as activated carbon, which absorbs large amounts of organic matter, and silica gel, which regulates humidity, have been used as adsorbents for contaminated gases in sealed hard disk drives (HDDs). These porous materials are all reversible. For example, activated carbon experiences adsorption and desorption depending on gas concentration and temperature, while silica gel experiences variations in the amount of moisture adsorbed depending on humidity and temperature. Reversible porous materials can be regenerated and are effective for removing large amounts of organic gases and moisture.

[0004] However, there are pollutant gases in the HDD, and even if the presence of these pollutants is less than 1%, it may cause problems. For example, oxygen sometimes oxidizes the magnetic part of the head and causes degradation of the characteristics, and siloxane sometimes produces particles in the gap between the head and the medium, causing collisions (crash). However, adsorbents such as activated carbon used in previous sealed HDDs have low ability to adsorb oxygen and siloxane, and special adsorbents need to be added to remove them. Furthermore, these adsorbents are reversible, so even if they are adsorbed once, they may be released later. Therefore, for the removal of oxygen, siloxane, etc., it is desirable to use irreversible adsorbents that do not release the adsorbed gas. When such irreversible adsorption components come into contact with air, their adsorption performance will deteriorate within a few hours, so they need to be installed in the HDD just before sealing. Summary of the Invention

[0005] An object of an embodiment of the present invention is to adsorb pollutant gas in a magnetic recording and reproducing device by incorporating an irreversible adsorption member into a housing.

[0006] According to an embodiment of the present invention, a magnetic recording and reproducing device including an irreversible attraction member in a sealed housing for the magnetic recording and reproducing device and a method for manufacturing the same are provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic cross-sectional view showing an example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0008] Figure 2 yes Figure 1 A partial enlarged view of .

[0009] Figure 3 This is a schematic diagram showing the structure of a pin-type irreversible adsorption member.

[0010] Figure 4 This is a flowchart showing an example of a method for manufacturing the magnetic recording and reproducing device according to the second embodiment.

[0011] Figure 5 This is a partially enlarged view of another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0012] Figure 6 It is an exploded perspective view of the magnetic recording and reproducing device according to the first embodiment.

[0013] Figure 7 It is a schematic cross-sectional view showing another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0014] Figure 8 yes Figure 7 A partial enlarged view of .

[0015] Figure 9 This is a partially enlarged view of another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0016] Figure 10 It is a schematic cross-sectional view showing another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0017] Figure 11 yes Figure 10 A partial enlarged view of .

[0018] Figure 12 This is a cross-sectional view schematically showing an example of a sheet-type irreversible adsorption member.

[0019] Figure 13 It is a cross-sectional view schematically showing another example of a sheet-type irreversible adsorption member.

[0020] Figure 14 This is a partially enlarged view of another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0021] Figure 15 It is a schematic cross-sectional view showing another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0022] Figure 16 yes Figure 15 A partial enlarged view of .

[0023] Figure 17It is a cross-sectional view showing the structure of a sealed pin-shaped irreversible adsorption member.

[0024] Figure 18 This is a flowchart showing an example of a method for manufacturing the magnetic recording and reproducing device according to the third embodiment.

[0025] Figure 19 This is a partially enlarged view of another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0026] Figure 20 This is a partial view of a magnetic recording and reproducing device using another example of a sealed irreversible adsorption member.

[0027] Figure 21 It is a cross-sectional view showing the structure of a sealed sheet-type irreversible adsorption member.

[0028] Figure 22 This is a partial view of a magnetic recording and reproducing device using another example of a sealed irreversible adsorption member.

[0029] Description of labels

[0030] 2-1 Pin-type irreversible adsorption member; 2-1a Head top; 2-1b Cylindrical storage portion; 2-2 Sheet-type irreversible adsorption member; 2-2a, 2-2a' peripheral portion; 2-3 Sealed pin-type irreversible adsorption member; 2-3a Head top; 2-3b End portion; 2-4 Sealed sheet-type irreversible adsorption member; 2-4a Peripheral portion; 10, 10', 10-1, 10-1', 10-2, 10-2', 10-3, 10-3', 10-4, 10-4' Magnetic recording and reproducing device; 12 Case; 14, 14-1 Top cover; 17 Magnetic head; 18 Magnetic disk 100, 100-1 breathing filter; 101, 101-1 housing; 105, 105-1 box body; 105a side wall; 105b bottom; 105c breathable member; 107 adsorption layer; 107-1 fibrous irreversible adsorbent; 107-2 sheet-like irreversible adsorbent; 108 opening; 108a end; 110, 110-1 first opening; 111, 111-1 second opening; 112, 112-1, 112-2 third opening; 113, 113-1, 113-2 fourth opening; 120, 120-1, 120-2 outer cover; 123, 124 sealing member DETAILED DESCRIPTION

[0031] The embodiments of the present invention include the following first to third embodiments.

[0032] The magnetic recording and reproducing device according to the first embodiment includes an irreversible attraction member in a sealed casing for the magnetic recording and reproducing device.

[0033] According to the magnetic recording and reproducing device according to the first embodiment, the irreversible adsorption member is incorporated in the sealed housing, thereby enabling sufficient adsorption of contaminant gases such as oxygen and siloxane within the magnetic recording and reproducing device.

[0034] The manufacturing method of the magnetic recording and reproducing device involved in the second embodiment is an example of a method for obtaining the magnetic recording and reproducing device involved in the first embodiment, including: installing components of the magnetic recording and reproducing device in a shell, testing the magnetic recording and reproducing device, installing an irreversible adsorption component in the shell of the tested magnetic recording and reproducing device, and then sealing the shell.

[0035] According to the manufacturing method of the magnetic recording and reproducing device involved in the second embodiment, by installing an irreversible adsorption component in the shell and then sealing the shell, the time that the irreversible adsorption component is exposed to the air can be minimized during manufacturing to suppress the reduction in the adsorption performance of the reversible adsorption component, and the pollutant gases such as oxygen and siloxane in the shell can be fully adsorbed to the irreversible adsorption component.

[0036] The manufacturing method of the magnetic recording and reproducing device involved in the third embodiment is an example of a method for obtaining the magnetic recording and reproducing device involved in the first embodiment, comprising: installing components of the magnetic recording and reproducing device and a sealed inactive irreversible adsorption member in a shell, conducting tests related to the magnetic recording and reproducing device, opening the sealed irreversible adsorption member in the shell of the magnetic recording and reproducing device after the test to activate it, and then sealing the shell.

[0037] According to the manufacturing method of the magnetic recording and reproducing device involved in the third embodiment, an inactive irreversible adsorption component is installed in the shell before the test, and is activated after the test, and then the shell is sealed. In this way, the time that the irreversible adsorption component is exposed to the air can be minimized during manufacturing, the reduction in the adsorption performance of the reversible adsorption component can be suppressed, and the pollutant gases such as oxygen and siloxane in the shell can be fully adsorbed to the irreversible adsorption component.

[0038] The irreversible adsorption member used in the embodiment is obtained by processing an irreversible adsorbent, and has a shape that can be easily installed in a magnetic recording and reproducing device.

[0039] Examples of the shape of the irreversible adsorption member include a pin shape, a sheet shape, and a bag shape.

[0040] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, showing examples in which irreversible adsorption members of various shapes are applied.

[0041] Furthermore, the disclosure is merely an example, and technical solutions that can be easily conceived by those skilled in the art and that maintain the essence of the invention are naturally within the scope of the present invention. Furthermore, to clarify the description, the drawings may sometimes schematically illustrate the width, thickness, shape, etc. of various components, as compared to the actual technical solutions. However, these are merely examples and do not limit the interpretation of the present invention. Furthermore, in this specification and the drawings, elements that are identical to those described in the accompanying drawings may be given the same reference numerals, and detailed descriptions may be omitted as appropriate.

[0042] Example 1

[0043] exist Figure 1 1 is a schematic cross-sectional view showing an example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0044] Figure 2 Show Figure 1 A partial enlarged view of .

[0045] An example is shown in which the magnetic recording and reproducing device 10 uses a pin-shaped irreversible adsorption member 2 - 1 as the irreversible adsorption member and is mounted on the breathing filter 100 .

[0046] As shown in the figure, the housing 101 for the magnetic recording and reproducing device 10 includes, for example, a metal case 12 and a metal top cover 14 for sealing the case 12. The case 12 houses components such as a magnetic recording medium and a magnetic head (not shown). As breathing holes from the interior of the housing 101 to the outside air, for example, a first opening 110 for a breathing filter and a second opening 111 for injecting an inert gas or the like can be provided in the top cover 14. The first opening 110 connects a first opening 110a provided on the inner surface 101a of the top cover 14 and a second opening 110b provided on the outer surface 101b of the top cover 14. A breathing filter 100 used for adjusting the humidity within the device is arranged near the first opening 110a. A pin-shaped irreversible adsorption member 2-1 is attached to the breathing filter 100 from the outside of the top cover 14 through the first opening 110. In order to prevent the intrusion of dust and the like, an air-permeable membrane filter 131 is provided at the opening on the inner surface 101 a side of the second opening 111 .

[0047] like Figure 2As shown, the breathing filter 100 is provided with a box body 105, for example, made of resin, and the box body 105 has a bottom 105b, a side wall 105a, and an air-permeable member 105c provided at an opening opposite to the bottom 105b. A first adsorption layer 107 containing, for example, activated carbon and silica gel can be accommodated within the box body 105. For example, an air-permeable membrane filter can be provided as the air-permeable member 105c. The bottom 105b can be arranged facing the first opening 110a and has an opening 108 that can communicate with the first opening 110a. At least a portion of the opening 108 is air-permeable. Here, for example, an air-permeable member 108a, for example, an air-permeable membrane filter, is provided at the end of the opening 108.

[0048] The pin-shaped irreversible adsorption member 2-1 is inserted into the opening 110 of the top cover 14 and the opening 108 of the breathing filter 100, and the top portion 2-1a of the pin-shaped irreversible adsorption member 2-1 is supported by the area 101c surrounding the second opening 110b of the top cover 14. Therefore, the diameter of the top portion 2-1a is larger than the aperture diameter of the second opening 110b.

[0049] Figure 3 A schematic diagram showing the structure of a pin-type irreversible adsorption member is shown.

[0050] like Figure 3 As shown, the pin-shaped irreversible adsorption member 2-1 comprises a pin-shaped housing 140 and an irreversible adsorbent 147. The irreversible adsorbent 147 is disposed within the housing 140 and is capable of irreversibly adsorbing contaminants such as oxygen, siloxane, and water vapor. The pin-shaped housing 140 includes a disk-shaped top portion 2-1a with an opening in the center, and a cylindrical housing 2-1b with openings at both ends, one of which is configured to communicate with the central opening of the top portion 2-1a. Furthermore, a permeable member 142, such as a membrane filter, is disposed in one opening located on the side of the top portion 2-1a, while a permeable member 143, such as a membrane filter, is disposed in the other opening opposite the one opening. The irreversible adsorbent 147 is, for example, granular and is housed within the housing 2-1b.

[0051] In the magnetic recording and reproducing device 10 , a flow path between the interior of the housing 101 and the pin-shaped irreversible adsorption member 2 - 1 is ensured via the air-permeable member 105 c of the breathing filter 100 and the end 108 a of the opening 108 , thereby enabling sufficient adsorption of pollutant gas in the housing 101 .

[0052] In addition, if Figure 1As shown, the top cover 14 is covered by an outer cover 120 welded to the box body 12. The outer cover 120 is formed of a metal sheet such as aluminum, and has a third opening 112 and a fourth opening 113 at positions opposite to the first opening 110 and the second opening 111 of the top cover 14, respectively, to serve as breathing holes from the inside of the shell 101 to the outside air. In order to set the pin-shaped irreversible adsorption member 2-1 on the top cover 14 through the third opening 112, the aperture of the third opening 112 is larger than the size of the top of the head 2-1a. The third opening 112 and the fourth opening 113 are blocked by seals 123 and 124, respectively. As the seals 123 and 124, seals using metal sheets such as aluminum can be used.

[0053] Irreversible adsorbents that can be used in the embodiments are, for example, materials that irreversibly adsorb pollutant gases such as oxygen and siloxane. Irreversible adsorbents can be processed into various shapes, such as granules, sheets, or fibers. Examples of such irreversible adsorbents include deoxidizers such as AGELESS (Mitsubishi Gas Chemical Co., Ltd.) and moisture absorbers such as molecular sieves.

[0054] The irreversible adsorbent 147 immediately starts adsorbing oxygen when it comes into contact with air and becomes saturated within a few hours. Therefore, the pin-shaped irreversible adsorption member 2-1 is stored in a low-humidity, oxygen-free atmosphere before being installed in the HDD and can be taken out and used immediately before the HDD is sealed.

[0055] The top portion 2 - 1 a may have a diameter of, for example, 5 to 15 mm, and the housing portion 2 - 1 b may have a diameter of, for example, 1 to 12 mm and a depth of 5 to 15 mm.

[0056] The first opening 110 and the second opening 110b have a size smaller than the diameter of the top portion 2-1a and larger than the diameter of the housing portion 2-1b, and may have a hole diameter of, for example, 4 to 13 mm.

[0057] The opening 108 of the breathing filter 100 has a size smaller than the diameter of the top portion 2-1a and larger than the diameter of the housing portion 2-1b, and may have a hole diameter of, for example, 4 to 13 mm and a depth of, for example, 6 to 16 mm.

[0058] The third opening 112 of the outer cover 120 has a hole diameter that is sufficiently larger than the diameter of the top portion 2 - 1 a , and may have a hole diameter of, for example, 6 to 16 mm.

[0059] In the magnetic recording and reproducing device 10 according to the first embodiment, by using a pin-shaped irreversible adsorption member 2-1 that can be attached to the breathing filter 100 from the outside of the housing 101 via the first and third openings 110 and 112 provided in the housing, the pin-shaped irreversible adsorption member 2-1 can be attached after the top cover 14 and outer cover 120 are attached to the case 12 of the housing 101. This allows the pin-shaped irreversible adsorption member 2-1 to be isolated from the air and maintained until just before the housing 101 of the magnetic recording and reproducing device 10 is sealed. This minimizes the time the pin-shaped irreversible adsorption member 2-1 is exposed to air during manufacture of the magnetic recording and reproducing device, minimizing the risk of degradation of its adsorption function. In this magnetic recording and reproducing device 10 according to the first embodiment, contaminated gas can be fully removed by the irreversible adsorption member, making it less likely to cause problems such as head collisions. Furthermore, during repairs, the breathing filter 100 can be regenerated by heating, vacuum drying, or the like, and can therefore be used as is. However, the irreversible adsorption member 2-1 cannot be regenerated and therefore needs to be replaced. In contrast, in the magnetic recording and reproducing device 10 according to the first embodiment, the irreversible adsorption member 2-1 can be replaced with a new one by removing the seal 123 without removing the top cover or outer cover.

[0060] Figure 4 A flowchart showing an example of a method for manufacturing the magnetic recording and reproducing device according to the second embodiment is shown.

[0061] The magnetic recording and reproducing device 10 can be manufactured as follows.

[0062] like Figure 1 As shown, first, the magnetic recording and reproducing device components such as a magnetic recording medium and a magnetic head, the top cover 14, and the outer cover 120 are mounted on the case 12, thereby partially assembling the magnetic recording and reproducing device (ST1).

[0063] Next, various tests such as operation confirmation and performance inspection of the magnetic recording and reproducing device are performed (ST2).

[0064] Then, after the air in the shell 101 is exhausted, an inert gas such as helium is introduced from the second opening 111 through the fourth opening 113 to adjust the internal pressure, and the cylindrical storage portion 2-1b of the pin-type irreversible adsorption component 2-1 is inserted from the third opening 112 of the outer cover 120 into the first opening 110 of the top cover 14 and the opening 108 of the breathing filter 100, thereby installing the pin-type irreversible adsorption component 2-1 on the shell 101 (ST3).

[0065] Next, the third opening 112 and the fourth opening 113 of the outer cover 120 are closed with metal seals 123 and 124 made of aluminum, for example, to seal the interior of the housing 101 ( ST4 ), thereby obtaining the magnetic recording and reproducing device 10 .

[0066] Thus, in the manufacturing method of the magnetic recording and reproducing device involved in the second embodiment, by using a pin-type irreversible adsorption component 2-1 of a breathing filter that can be installed from the outside of the shell through an opening serving as a breathing hole in the magnetic recording and reproducing device 10, the pin-type irreversible adsorption component 2-1 can be installed in the shell after various tests of the magnetic recording and reproducing device are completed.

[0067] Therefore, the pin-shaped irreversible adsorption member can be isolated from the air and maintained until just before the housing is sealed, minimizing the time the pin-shaped irreversible adsorption member 2-1 is in contact with the air. Consequently, in the method for manufacturing a magnetic recording and reproducing device according to the second embodiment, the adsorption performance of the pin-shaped irreversible adsorption member used is unlikely to decrease, allowing contaminant gases such as oxygen and siloxane to be fully adsorbed within the sealed magnetic recording and reproducing device.

[0068] Figure 5 A partially enlarged view showing another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0069] The magnetic recording and reproducing device 10 ′ shows another example in which a pin-shaped irreversible adsorption member is used as the irreversible adsorption member and is attached to a breathing filter.

[0070] As shown in the figure, the magnetic recording and reproducing device 10' is provided with an outer cover 120-1 having a third opening 112-1 with a height difference. The third opening 112-1 has a two-stage aperture, for example. The aperture of the second opening 112-1b on the ambient air side is larger than the aperture of the first opening 112-1a on the top cover 14 side. The area 120-1a surrounding the first opening 112-1a is shaped to extend toward the center of the first opening 112-1a, forming a hole with a height difference. Furthermore, in the magnetic recording and reproducing device 10', the pin-shaped irreversible adsorption member 2-1 is installed so that it is inserted into the third opening 112-1 of the outer cover 120-1, the first opening 110 of the top cover 14, and the opening 108 of the breathing filter 100, with the top portion 2-1a of the pin-shaped irreversible adsorption member 2-1 supported by the area 120-1a surrounding the first opening 112-1a of the third opening 112-1 of the outer cover 120-1. For example, the first opening 112-1a of the third opening 112-1 of the outer cover 120-1 can be smaller than the diameter of the top portion 2-1a, for example, having a diameter of 3 to 14 mm. Furthermore, the second opening 112-1b has a diameter sufficiently larger than the diameter of the top portion 2-1a, for example, having a diameter of 5 to 16 mm.

[0071] Thus, in the magnetic recording and reproducing device 10', the third opening 112-1 of the outer cover 120-1 has a stepped shape, and the area supporting the top portion 2-1a of the pin-shaped irreversible adsorption member 2-1 is located on the outer cover 120-1. The rest of the structure of the magnetic recording and reproducing device 10' is the same as that of the magnetic recording and reproducing device 10.

[0072] In the magnetic recording and reproducing device 10' according to the first embodiment, by using a pin-shaped irreversible adsorption member 2-1 that can be attached to the breathing filter 100 via the first and third openings 110 and 112 provided in the housing, the pin-shaped irreversible adsorption member 2-1 can be installed after the top cover 14 and outer cover 120 are attached to the case 12 of the housing 101. This allows the pin-shaped irreversible adsorption member 2-1 to be isolated from the air and maintained until just before the housing 101 of the magnetic recording and reproducing device 10' is sealed. This minimizes the time the pin-shaped irreversible adsorption member 2-1 is exposed to air during manufacture of the magnetic recording and reproducing device, minimizing the risk of reduced adsorption performance. Thus, within the magnetic recording and reproducing device 10' according to the first embodiment, contaminated gas can be fully removed by the irreversible adsorption member, making it less likely to cause problems such as head collisions.

[0073] In addition, the magnetic recording and reproducing device 10' uses an outer cover 120-1 having a third opening 112-1 with two levels of aperture instead of the outer cover 120 having a third opening 112 without a height difference, and the pin-type irreversible adsorption member 2-1 is installed in a manner such that its top portion 2-1a is supported by the area 120-1a around the first opening 112-1a of the third opening 112-1 instead of being supported by the area 101c around the second opening 110b of the top cover 14. Except for these, it can be manufactured in the same manner as the magnetic recording and reproducing device 10.

[0074] An example in which the magnetic recording and reproducing device of the first embodiment is applied to a hard disk drive (HDD) will be described in detail.

[0075] Figure 6 This is an exploded perspective view of the magnetic recording and reproducing device according to the first embodiment, showing the device with the top cover removed.

[0076] The HDD, which serves as the magnetic recording and reproducing device 10, has a flat, roughly rectangular housing 101. The housing 101 includes a rectangular box-shaped body 12 with an open top surface and a top cover 14. The body 12 includes a rectangular bottom wall 12a that faces the top cover 14 with a gap therebetween, and side walls 12b that rise along the periphery of the bottom wall. The body 12 is integrally formed from, for example, aluminum. The top cover 14 is formed into a rectangular plate-like shape from, for example, stainless steel. The top cover 14 is screwed onto the side walls 12b of the body 12 via a plurality of screws 13, thereby closing the upper opening of the body 12.

[0077] A plurality of magnetic disks 18 serving as disk-shaped magnetic recording media and a spindle motor 19 for supporting and rotating the magnetic disks 18 are provided in the housing 101. The spindle motor 19 is disposed on the bottom wall 12a. Each magnetic disk 18 is formed to have a diameter of, for example, 88.9 mm (3.5 inches) and has a magnetic recording layer on its upper or lower surface. Each magnetic disk 18 is coaxially fitted into a hub (not shown) of the spindle motor 19 and is clamped and fixed to the hub by a clamp spring 20. Thus, each magnetic disk 18 is supported in a state parallel to the bottom wall 12a of the case 12. Each magnetic disk 18 is rotated at a predetermined rotational speed by the spindle motor 19.

[0078] In addition, although, for example, seven magnetic disks 18 are arranged in the housing 101 here, the number of magnetic disks 18 is not limited thereto.

[0079] Disposed within the housing 101 are a plurality of magnetic heads 17 for recording and reproducing information on a magnetic disk 18, and an actuator assembly 22 for supporting these magnetic heads 17 so that they can move freely relative to the magnetic disk 18. Also disposed within the housing 101 are a voice coil motor (VCM) 24 for rotating and positioning the actuator assembly 22, a ramp loading mechanism 25 for maintaining the magnetic heads 17 in an unloaded position away from the magnetic disk 18 when the magnetic heads 17 have moved to the outermost periphery of the magnetic disk 18, and a substrate unit (FPC unit) 21 on which electronic components such as a conversion connector are mounted.

[0080] A printed circuit board 27 is screwed onto the outer surface of the bottom wall 12a of the box body 12. The printed circuit board 27 constitutes a control unit that controls the operation of the spindle motor 19 and controls the operation of the VCM 24 and the magnetic head 17 via the substrate unit 21. The actuator assembly 22 includes an actuator block 29, a plurality of arms 30, for example eight, extending in the same direction from the actuator block 29, and a plurality of head gimbal assemblies (HGAs) 32 mounted on the extended ends of each arm 30. The actuator block 29 is supported by a support shaft (pivot) 26 erected on the bottom wall 12a via a unit bearing in a freely rotatable manner. Each HGA 32 includes a suspension (load beam) extending from the arm 30, a flexure (wiring member) (not shown) arranged on the load beam and the arm 30, and a magnetic head 17 mounted on the gimbal portion of the flexure.

[0081] Actuator assembly 22 further includes a support frame (not shown) extending from actuator block 29 in a direction opposite to arm 30, and a voice coil mounted on the support frame. The voice coil is positioned between a pair of yokes 38 provided on bottom wall 12a and, together with these yokes 38 and a magnet fixed to one of the yokes 38, forms VCM 24.

[0082] The FPC unit 21 has a main body 21a formed of a flexible printed circuit board, and the main body 21a is fixed to the bottom wall 12a of the box body 12. Electronic components such as a conversion connector are mounted on the main body 21a. The conversion connector passes through the bottom wall 12a and is connected to the printed circuit board 27. The FPC unit 21 has a relay flexible printed circuit board (hereinafter referred to as a relay FPC) 21b extending from the main body 21a. The extended end of the relay FPC 21b is mounted on the side surface (installation surface) of the actuator block 29. The extended end of the relay FPC 21b is electrically connected to the magnetic head 17 via the aforementioned flexible member.

[0083] According to the present embodiment, the HDD further includes a breathing filter 100 for humidity adjustment provided in the housing 101 and a pin-shaped irreversible adsorption member 2-1 mounted on the breathing filter 100 and adsorbing pollutant gases such as oxygen and siloxane. The breathing filter 100 is fixed to the inner surface of the housing 101. The pin-shaped irreversible adsorption member 2-1 is inserted from the outer surface of the housing 101 and mounted on the breathing filter 100. An outer cover (not shown) for sealing the housing 101 may also be provided on the top cover 14. In addition, a first opening (not shown) and a second opening different from the first opening may be provided on the top cover 14 and the outer cover as breathing holes for the breathing filter 100, which can be used for mounting the pin-shaped irreversible adsorption member 2-1.

[0084] Example 2

[0085] Figure 7 A schematic cross-sectional view showing another example of the structure of the magnetic recording and reproducing device according to the first embodiment is shown.

[0086] Figure 8 Show Figure 7 A partial enlarged view of .

[0087] An example is shown in which a pin-shaped irreversible attraction member 2 - 1 is used as the irreversible attraction member in the magnetic recording and reproducing device 10 - 1 and is attached to the second opening 111 - 1 .

[0088] As shown in the figure, the housing 101-1 for the magnetic recording and reproducing device 10-1 includes a case body 12, for example, made of metal, and a top cover 14-1, for example, made of metal, for sealing the case body 12. The case body 12 houses components such as a magnetic recording medium and a magnetic head (not shown). As breathing holes from the interior of the housing 101-1 to the outside air, for example, a first opening 110-1 for a breathing filter and a second opening 111-1 for injecting an inert gas, etc., can be provided in the top cover 14-1. The second opening 111-1 connects the first opening 111-1a provided on the inner surface 101a of the top cover 14-1 and the second opening 111-1b provided on the outer surface 101b of the top cover 14-1. A breathing filter 100-1 is installed inside the housing 101-1, within the first opening 110-1. This breathing filter 100-1 is used to adjust the humidity within the device and includes a first adsorption layer 107, for example, containing activated carbon and silica gel, housed within a case 105-1. Case 105-1 comprises a main body, for example, made of resin, and a breathable membrane filter 105-1c, serving as a breathable member. The main body has a bottom 105-1b, sidewalls 105-1a, and an opening facing the bottom 105-1b. The breathable membrane filter 105-1c is installed in the opening. Furthermore, a pin-shaped irreversible adsorption member 2-1 is attached to the second opening 111-1 from the outside of the top cover 14-1, passing through the second opening 111-1.

[0089] The pin-shaped irreversible adsorption member 2-1 has Figure 3 The same structure. The top portion 2-1a of the pin-shaped irreversible adsorption member 2-1 is supported on the area 101d around the second opening 111-1b. Therefore, the diameter of the top portion 2-1a is larger than the aperture of the second opening 111-1b. In addition, the cylindrical storage portion 2-1b is inserted into the second opening 111-1 and protrudes from the inner surface 101a of the top cover 14-1. A side wall 132, for example made of resin, is provided around the opening 111-1a to surround the protruding cylindrical storage portion 2-1b. In order to prevent the intrusion of dust, etc., a breathable membrane filter 131-1 is provided on the end surface of the side wall 132 on the inner side of the shell 101-1.

[0090] In the magnetic recording and reproducing device 10 - 1 , a flow path between the interior of the housing 101 and the pin-shaped irreversible adsorption member 2 - 1 is ensured via the air-permeable membrane filter 131 - 1 , and contaminant gas in the housing 101 can be sufficiently adsorbed.

[0091] In addition, if Figure 7As shown, the top cover 14-1 is covered by an outer cover 120-2 welded to the box body 12. The outer cover 120-2 is formed from a sheet metal such as aluminum and has a third opening 112-2 and a fourth opening 113-1, respectively, opposite the first opening 110-1 and the second opening 111-1 of the top cover 14-1. To allow the pin-shaped irreversible adsorption member 2-1 to be installed on the top cover 14 through the fourth opening 113-1, the diameter of the fourth opening 113-1 is larger than the size of the top portion 2-1a. The third opening 112-2 and the fourth opening 113-1 are blocked by seals 123 and 124, respectively.

[0092] The second opening 111 - 1 has a size smaller than the diameter of the top portion 2 - 1 a and larger than the diameter of the housing portion 2 - 1 b , and may have a hole diameter of, for example, 2 to 13 mm.

[0093] The fourth opening 113 - 1 of the outer cover 120 has a hole diameter that is sufficiently larger than the diameter of the top portion 2 - 1 a , and may have a hole diameter of, for example, 6 to 16 mm.

[0094] Thus, the magnetic recording and reproducing device 10-1 uses a top cover 14-1 having a pin-shaped irreversible adsorption member 2-1 mounted in the second opening 111-1. Furthermore, a side wall 132, made of, for example, resin, is provided around the opening 111-1a of the second opening 111-1 to surround the pin-shaped irreversible adsorption member 2-1. Furthermore, an air-permeable membrane filter 131-1 is provided on the end surface of the side wall 132. The remaining structure of the magnetic recording and reproducing device 10-1 is the same as that of the magnetic recording and reproducing device 10.

[0095] In the magnetic recording and reproducing device 10-1 according to the first embodiment, by using a pin-shaped irreversible adsorption member 2-1 that can be attached to the second opening 111-1 from the outside of the housing 101-1 via the fourth opening 113-1, the pin-shaped irreversible adsorption member 2-1 can be installed after the top cover 14-1 and the outer cover 120-2 are attached to the case 12 of the housing 101-1. This allows the pin-shaped irreversible adsorption member 2-1 to be isolated from the air and maintained until just before the housing 101-1 of the magnetic recording and reproducing device 10-1 is sealed. This minimizes the time the pin-shaped irreversible adsorption member 2-1 is exposed to air during manufacturing of the magnetic recording and reproducing device, minimizing the risk of degradation of its adsorption function. In this magnetic recording and reproducing device 10-1 according to the first embodiment, contaminated gas can be fully removed by the irreversible adsorption member, making it less likely to cause problems such as head collisions. Furthermore, when the magnetic recording and reproducing device 10 - 1 according to the first embodiment is used, the irreversible adsorption member 2 - 1 can be replaced with a new one without removing the top cover and the outer cover during repair or the like.

[0096] The magnetic recording and reproducing device 10-1 of Example 2 can apply another example of the manufacturing method of a magnetic recording and reproducing device according to the second embodiment and can be manufactured in the same manner as the magnetic recording and reproducing device 10 of Example 1. However, in Example 2, instead of the breathing filter 100 having the opening 108 on the bottom 105b of the case, a breathing filter 100-1 without openings on the bottom of the case 105-1 is used. Furthermore, in Example 2, instead of the top cover 14, a top cover 14-1 is used, in which a side wall 132, for example made of resin, is provided around the opening 111-1a of the second opening 111-1 to surround the pin-shaped irreversible adsorption member 2-1, and a breathable membrane filter 131-1 is provided on the end surface of the side wall 132. Furthermore, in Example 2, instead of attaching the pin-shaped irreversible adsorption member 2 - 1 to the breathing filter 100 from outside the housing 101 , the pin-shaped irreversible adsorption member 2 - 1 is attached to the second opening 111 - 1 from outside the housing 101 - 1 .

[0097] According to another example of the method for manufacturing a magnetic recording and reproducing device according to the second embodiment, by using a pin-shaped irreversible adsorption member 2-1 that can be installed from outside the housing into the opening serving as a breathing hole in the magnetic recording and reproducing device 10-1, the pin-shaped irreversible adsorption member 2-1 can be installed in the housing after various tests of the magnetic recording and reproducing device are completed. Therefore, the pin-shaped irreversible adsorption member can be kept isolated from the air until just before the housing is sealed, and the time the pin-shaped irreversible adsorption member 2-1 is in contact with the air can be minimized. As a result, in the method for manufacturing a magnetic recording and reproducing device according to the second embodiment, the adsorption performance of the pin-shaped irreversible adsorption member used is unlikely to decrease, and contaminant gases such as oxygen and siloxane can be fully adsorbed within the sealed magnetic recording and reproducing device.

[0098] Figure 9 A partially enlarged view showing another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0099] In another example, a magnetic recording and reproducing device 10 - 1 ′ uses a pin-shaped irreversible attraction member as the irreversible attraction member and is attached to the second opening 111 - 1 .

[0100] As shown in the figure, in this magnetic recording and reproducing device 10-1', instead of the outer cover 120-2 having the fourth opening 113-1 without a step, an outer cover 120-3 having the fourth opening 113-2 with a step is provided. The fourth opening 113-2 has, for example, a two-stage aperture. The aperture of the second opening 113-2b on the ambient air side is larger than the aperture of the first opening 113-2a on the top cover 14 side. The area 120-3a surrounding the first opening 113-2a is shaped to extend toward the center of the first opening 113-2a, forming a stepped aperture. Furthermore, in the magnetic recording and reproducing device 10-1', the pin-shaped irreversible adsorption member 2-1 is installed so that it is inserted into the fourth opening 113-2 of the outer cover 120-3 and the opening 111-1 of the top cover 14-1, and the top portion 2-1a of the pin-shaped irreversible adsorption member 2-1 is supported by the area 120-3a surrounding the first opening 113-2a of the fourth opening 113-2 of the outer cover 120-3. For example, the first opening 113-2a of the fourth opening 113-2 of the outer cover 120-3 may be smaller than the diameter of the top portion 2-1a, and may have a diameter of, for example, 2 to 13 mm. Furthermore, the second opening 113-2b may have a diameter sufficiently larger than the diameter of the top portion 2-1a, and may have a diameter of, for example, 6 to 16 mm.

[0101] Thus, in the magnetic recording and reproducing device 10-1', the fourth opening 113-2 of the outer cover 120-3 has a stepped shape, and the area supporting the top portion 2-1a of the pin-shaped irreversible adsorption member 2-1 is located on the outer cover 120-3. The rest of the structure of the magnetic recording and reproducing device 10-1' is the same as that of the magnetic recording and reproducing device 10-1.

[0102] In the magnetic recording and reproducing device 10-1' according to the first embodiment, by using a pin-shaped irreversible adsorption member 2-1 that can be attached to the second opening 111-1 from the outside of the housing 101-1 via the fourth opening 113-2, the pin-shaped irreversible adsorption member 2-1 can be installed after the top cover 14-1 and the outer cover 120-3 are attached to the case 12 of the housing 101-1. This allows the pin-shaped irreversible adsorption member 2-1 to be isolated from the air and maintained until just before the housing 101-1 of the magnetic recording and reproducing device 10-1' is sealed. This minimizes the time the pin-shaped irreversible adsorption member 2-1 is exposed to air during manufacturing of the magnetic recording and reproducing device, minimizing the risk of degradation of its adsorption function. Thus, within the magnetic recording and reproducing device 10-1' according to the first embodiment, contaminated gas can be fully removed by the irreversible adsorption member, thereby reducing the occurrence of defects such as head collisions. Furthermore, when repairing or the like is performed, the irreversible adsorption member 2 - 1 can be replaced with a new one without removing the top cover and the outer cover.

[0103] In addition, the magnetic recording and reproducing device 10-1' uses an outer cover 120-3 having a fourth opening 113-2 with two levels of aperture instead of the outer cover 120-2 having a fourth opening 113-1 without a height difference, and the pin-type irreversible adsorption member 2-1 is installed in a manner in which its top portion 2-1a is supported by an area 120-3a around the first opening 113-2a of the fourth opening 113-2 instead of being supported by an area 101d around the second opening 111-1b of the top cover 14. Except for these, it can be manufactured in the same manner as the magnetic recording and reproducing device 10-1.

[0104] Example 3

[0105] Figure 10 A schematic cross-sectional view showing another example of the structure of the magnetic recording and reproducing device according to the first embodiment is shown.

[0106] Figure 11 Show Figure 10 A partial enlarged view of .

[0107] The following example is shown: the magnetic recording and reproducing device 10 - 2 uses a sheet-type irreversible adsorption member 2 - 2 as the irreversible adsorption member, and is attached to the second opening 111 - 1 .

[0108] As shown in the figure, the housing 101 for the magnetic recording and reproducing device 10-2 includes a case 12, for example, made of metal, and a top cover 14, for example, made of metal, for sealing the case 12. The case 12 houses components such as a magnetic recording medium and a magnetic head (not shown). As breathing holes from the interior of the housing 101 to the outside air, for example, a first opening 110-1 for a breathing filter and a second opening 111-1 for injecting an inert gas, etc., can be provided in the top cover 14. The second opening 111-1 connects a first opening 111-1a provided on the inner surface 101a of the top cover 14 and a second opening 111-1b provided on the outer surface 101b of the top cover 14. A breathing filter 100-1 is provided inside the housing 101-1, on the inside of the first opening 110-1. This breathing filter 100-1 is used to adjust the humidity within the device and has a first adsorption layer 107, for example, containing activated carbon and silica gel, housed within the case 105-1. The case 105-1 comprises a main body made of, for example, resin, and a breathable membrane filter 105-1c serving as a breathable member. The main body comprises a bottom 105-1b, a sidewall 105-1a, and an opening facing the bottom 105-1b. The breathable membrane filter 105-1c is disposed in the opening. Furthermore, a sheet-shaped irreversible adsorption member 2-2 is disposed in a region 101d surrounding the second opening 111-1, from outside the top cover 14.

[0109] Figure 12This is a cross-sectional view schematically showing an example of a sheet-type irreversible adsorption member.

[0110] As the sheet-type irreversible adsorption member 2-2, for example Figure 12 As shown, a woven fabric sheet 145-3 woven with a fibrous irreversible adsorbent 107-1 can be used. The peripheral edge 2-2a of the sheet-shaped irreversible adsorption member 2-2 is supported in the area 101d surrounding the second opening 111-1b. Therefore, the diameter of the sheet-shaped irreversible adsorption member 2-2 is larger than the aperture of the second opening 111-1b. Furthermore, to prevent the intrusion of dust and the like, a breathable membrane filter 131-2, for example, is provided in the first opening 111-1a on the inner surface 101a side of the second opening 111-1.

[0111] In the magnetic recording and reproducing device 10 - 1 , a flow path between the interior of the housing 101 and the pin-shaped irreversible adsorption member 2 - 2 is ensured via the air-permeable membrane filter 131 - 2 , and contaminant gas in the housing 101 can be sufficiently adsorbed.

[0112] In addition, if Figure 10 As shown, the top cover 14 is covered by an outer cover 120-2 welded to the box body 12. The outer cover 120-2 is formed of a metal sheet such as aluminum, and has a third opening 112-2 and a fourth opening 113-1 at positions opposite to the first opening 110-1 and the second opening 111-1 of the top cover 14, respectively. In order to set the sheet-type irreversible adsorption member 2-2 on the top cover 14 through the fourth opening 113-1, the aperture of the fourth opening 113-1 is larger than the size of the sheet-type irreversible adsorption member 2-2. The third opening 112-2 and the fourth opening 113-1 are blocked by sealing members 123 and 124, respectively. In addition, the second opening 111-1 is smaller than the size of the sheet-type irreversible adsorption member 2-2, and can have an aperture of, for example, 2 to 10 mm. Furthermore, the fourth opening 113 - 1 of the outer cover 120 has a hole diameter that is sufficiently larger than the size of the sheet-shaped irreversible adsorption member 2 - 2 , and may have a hole diameter of, for example, 4 to 12 mm.

[0113] Thus, the magnetic recording and reproducing device 10 - 2 has the sheet-shaped irreversible adsorption member 2 - 2 mounted in the second opening 111 - 1. The rest of the structure of the magnetic recording and reproducing device 10 - 2 is the same as that of the magnetic recording and reproducing device 10 .

[0114] In the magnetic recording and reproducing device 10-2 according to the first embodiment, by using a sheet-type irreversible adsorption member 2-2 that can be attached to the second opening 111-1 from the outside of the housing 101-1 via the fourth opening 113-1, the sheet-type irreversible adsorption member 2-2 can be installed after the top cover 14 and the outer cover 120-2 are attached to the case 12 of the housing 101. This allows the sheet-type irreversible adsorption member 2-2 to be isolated from the air and maintained until just before the housing 101 of the magnetic recording and reproducing device 10-2 is sealed. This minimizes the time the sheet-type irreversible adsorption member 2-2 is exposed to air during manufacturing of the magnetic recording and reproducing device, minimizing the risk of degradation of its adsorption function. In this magnetic recording and reproducing device 10-2 according to the first embodiment, contaminated gas can be fully removed by the irreversible adsorption member, making it less likely to cause problems such as head collisions. Furthermore, during repair or the like, the irreversible adsorption member 2 - 2 can be replaced with a new one simply by removing the seal 124 without removing the top cover and the outer cover.

[0115] As another example of a method for manufacturing a magnetic recording and reproducing device according to the second embodiment, a magnetic recording and reproducing device 10-2 can be manufactured in the same manner as the magnetic recording and reproducing device 10 of Example 1. However, in magnetic recording and reproducing device 10-2, instead of using the breathing filter 100 having the opening 108 on the bottom 105b of the case, a breathing filter 100-1 without openings is used on the bottom of the case 105-1. Furthermore, in magnetic recording and reproducing device 10-2, instead of attaching the pin-shaped irreversible adsorption member 2-1 to the breathing filter 100 from outside the case 101, a sheet-shaped irreversible adsorption member 2-2 is attached to the second opening 111-1 from outside the case 101.

[0116] According to another example of the method for manufacturing a magnetic recording and reproducing device according to the second embodiment, by using a sheet-type irreversible adsorption member 2-2 that can be mounted to the second opening 111-1 from outside the housing in the magnetic recording and reproducing device 10-2, the sheet-type irreversible adsorption member 2-2 can be mounted in the housing after various tests of the magnetic recording and reproducing device are completed. Therefore, the sheet-type irreversible adsorption member 2-2 can be isolated from the air and maintained until the housing is sealed, minimizing the time it is in contact with air. As a result, in the method for manufacturing a magnetic recording and reproducing device according to the second embodiment, the adsorption performance of the pin-type irreversible adsorption member used is unlikely to decrease, and contaminant gases such as oxygen and siloxane can be fully adsorbed within the sealed magnetic recording and reproducing device.

[0117] Figure 14 A partially enlarged view showing another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0118] Another example is shown below: a magnetic recording and reproducing device 10 - 2 ′ uses a sheet-type irreversible adsorption member as the irreversible adsorption member and is attached to the second opening 111 - 1 .

[0119] As shown in the figure, in this magnetic recording and reproducing device 10-2', instead of the outer cover 120-2 having the fourth opening 113-1 without a step, an outer cover 120-3 having the fourth opening 113-2 with a step is provided. The fourth opening 113-2 has, for example, a two-stage aperture. The aperture of the second opening 113-2b on the ambient air side is larger than the aperture of the first opening 113-2a on the top cover 14 side. The area 120-3a surrounding the first opening 113-2a is shaped to extend toward the center of the first opening 113-2a, forming a stepped aperture. Furthermore, in the magnetic recording and reproducing device 10-2', the sheet-type irreversible adsorption member 2-2 is installed so as to be inserted into the fourth opening 113-2 of the outer cover 120-3 and the opening 111-1 of the top cover 14, with the peripheral edge 2-2a of the sheet-type irreversible adsorption member 2-2 being supported by the area 120-3a surrounding the first opening 113-2a of the fourth opening 113-2 of the outer cover 120-3. For example, the first opening 113-2a of the fourth opening 113-2 of the outer cover 120-3 may be smaller than the size of the sheet-type irreversible adsorption member 2-2, and may have a diameter of, for example, 2 to 10 mm. Furthermore, the second opening 113-2b may have a diameter sufficiently larger than the size of the sheet-type irreversible adsorption member 2-2, and may have a diameter of, for example, 4 to 12 mm.

[0120] Thus, in the magnetic recording and reproducing device 10-2', the fourth opening 113-2 of the outer cover 120-3 has a stepped shape, and the region 120-3a supporting the sheet-shaped irreversible adsorption member 2-2 is located on the outer cover 120-3. The rest of the structure of the magnetic recording and reproducing device 10-2' is the same as that of the magnetic recording and reproducing device 10-2.

[0121] In the magnetic recording and reproducing device 10-2' according to the first embodiment, by using a sheet-type irreversible adsorption member 2-2 that can be attached to the fourth opening 113-2 from the outside of the housing 101, the sheet-type irreversible adsorption member 2-2 can be installed after the top cover 14 and the outer cover 120-3 are attached to the case 12 of the housing 101. This allows the sheet-type irreversible adsorption member 2-2 to be isolated from the air and maintained until just before the housing 101 of the magnetic recording and reproducing device 10-2' is sealed. This minimizes the time the sheet-type irreversible adsorption member 2-2 is exposed to air during manufacture of the magnetic recording and reproducing device, minimizing the risk of degradation of its adsorption function. Thus, within the magnetic recording and reproducing device 10-2' according to the first embodiment, contaminated gas can be fully removed by the irreversible adsorption member, thereby reducing the occurrence of defects such as head collisions. Furthermore, during repair or the like, the irreversible adsorption member 2 - 2 ′ can be replaced with a new one by simply removing the seal 124 without removing the top cover and the outer cover.

[0122] In addition, the magnetic recording and reproducing device 10-2' uses an outer cover 120-3 having a fourth opening 113-2 with two levels of aperture instead of the outer cover 120-2 having a fourth opening 113-1 without a height difference, and the sheet-type irreversible adsorption member 2-2 is installed in a manner supported by an area 120-3a around the first opening 113-2a of the fourth opening 113-2 instead of an area 101d around the second opening 111-1b of the top cover 14. Except for these, the magnetic recording and reproducing device 10-2 can be manufactured in the same manner as the magnetic recording and reproducing device 10-2 by applying the manufacturing method of the magnetic recording medium involved in the second embodiment.

[0123] Figure 12 The sheet-type irreversible adsorption component 2-2 is capable of Figure 11 The magnetic recording and reproducing device 10-2 shown in FIG. Figure 14 The illustrated sheet-type irreversible adsorption member used in the magnetic recording and reproducing device 10 - 2 ′ is an example, and other sheet-type irreversible adsorption members may be used.

[0124] Figure 13 It is a cross-sectional view schematically showing another example of a sheet-type irreversible adsorption member.

[0125] like Figure 13 As shown, for example, a laminated sheet 2 - 2 ′ may be used in which an irreversible adsorbent 107 - 2 processed into a sheet shape is disposed between two air-permeable sheets 145 - 1 and 145 - 2 formed of air-permeable membrane filters or the like and the two sheets are laminated.

[0126] Example 4

[0127] Figure 15A schematic cross-sectional view showing another example of the structure of the magnetic recording and reproducing device according to the first embodiment is shown.

[0128] Figure 16 Show Figure 15 A partial enlarged view of .

[0129] The following example is shown: the magnetic recording and reproducing device 10 - 3 uses a pin-shaped irreversible adsorption member 2 - 3 in which an adsorbent is sealed as the irreversible adsorption member, and is attached to the second opening 111 - 1 .

[0130] As shown in the figure, the housing 101-1 for the magnetic recording and reproducing device 10-3 includes a case body 12, for example, made of metal, and a top cover 14-1, for example, made of metal, for sealing the case body 12. The case body 12 houses components such as a magnetic recording medium and a magnetic head (not shown). As breathing holes from the interior of the housing 101-1 to the outside air, for example, a first opening 110-1 for a breathing filter and a second opening 111-1 for injecting an inert gas, etc., can be provided in the top cover 14-1. The second opening 111-1 connects the first opening 111-1a provided on the inner surface 101a of the top cover 14-1 and the second opening 111-1b provided on the outer surface 101b of the top cover 14-1. A breathing filter 100-1 is installed inside the housing 101-1, within the first opening 110-1. This breathing filter 100-1 is used to adjust the humidity within the device and includes a first adsorption layer 107, for example, containing activated carbon and silica gel, housed within a case 105-1. Case 105-1 comprises a resin body and a breathable membrane filter 105-1c, serving as a breathable member. The body has a bottom 105-1b, sidewalls 105-1a, and an opening facing the bottom 105-1b. The breathable membrane filter 105-1c is located within the opening. Furthermore, a pin-shaped irreversible adsorption member 2-3 is attached to the second opening 111-1 from the outside of the top cover 14-1, extending through the second opening 111-1.

[0131] Figure 17 This is a schematic diagram showing the structure of a sealed pin-shaped irreversible adsorption member.

[0132] like Figure 17As shown, the pin-shaped irreversible adsorption member 2-3 includes a pin-shaped housing 144 formed from, for example, a molded resin or polyacetal resin, and an irreversible adsorbent 147 disposed within the housing 144, capable of irreversibly adsorbing contaminants such as oxygen, siloxane, and water vapor. The pin-shaped housing 144 includes a disk-shaped top portion 2-3a and a cylindrical housing 2-3b extending perpendicularly from the center of one surface of the top portion 2-3a, thereby sealing the housing from the outside air. Furthermore, a permeable member 145, such as a permeable membrane filter, is disposed on the top portion 2-3a side of the cylindrical housing 2-3b, spaced from the top portion 2-3a. A permeable member 146, such as a permeable membrane filter, is disposed on the end portion 2-3c of the cylindrical housing 2-3b, facing the top portion 2-3a, spaced from the end portion 2-3c. The irreversible adsorbent 147 is, for example, in a granular form, and is housed between the air-permeable member 145 and the air-permeable member 146 in the housing portion 2 - 1 b and is held in a sealed manner isolated from the air.

[0133] The top portion 2-3a of the pin-shaped irreversible adsorption member 2-3 is supported by the area 101d around the second opening 111-1b. Therefore, the diameter of the top portion 2-3a is larger than the aperture of the second opening 111-1b. In addition, the cylindrical storage portion 2-3b is inserted into the second opening 111-1 and protrudes from the inner surface 101a of the top cover 14-1. A side wall 132, for example made of resin, is provided around the opening 111-1a to surround the protruding cylindrical storage portion 2-3b. On the end surface of the side wall 132 on the inner side of the housing 101-1, a breathable membrane filter 131-1, for example, is provided at a distance from the end of the cylindrical storage portion 2-3b to prevent the intrusion of dust, etc. By providing the membrane filter 131 - 1 via the side wall 132 , it is possible to prevent the membrane filter 131 - 1 from being damaged when the needle-shaped member 150 penetrates the pin-shaped irreversible adsorption member 2 - 3 .

[0134] The magnetic recording and reproducing device 10-3 can open the sealed housing 2-3b of the pin-shaped irreversible adsorption member 2-3 by, for example, using a needle-shaped member 150 that penetrates from near the center of the top portion 2-3a to near the center of the end portion 2-3c as indicated by the arrow, thereby activating the irreversible adsorbent 147, which has been inactivated and isolated from air. The provision of air-permeable members 145 and 146 prevents leakage of the irreversible adsorbent 147 if the pin-shaped irreversible adsorption member 2-3 is penetrated. The opening 113-1 can then be sealed with a seal 124. This ensures a flow path between the interior of the housing 101-1 and the interior of the pin-shaped irreversible adsorption member 2-3 via the membrane filter 146 on the end portion 2-3c, enabling sufficient adsorption of contaminated gases within the housing 101-1.

[0135] In addition, if Figure 15 As shown, the top cover 14-1 is covered by an outer cover 120-2 welded to the box body 12. The outer cover 120-2 is made of a sheet metal such as aluminum and has a third opening 112-2 and a fourth opening 113-1, respectively, opposite the first opening 110-1 and the second opening 111-1 of the top cover 14-1. To allow the pin-shaped irreversible adsorption member 2-1 to be installed in the top cover 14-1 through the fourth opening 113-1, the diameter of the fourth opening 113-1 is larger than the size of the top portion 2-1a. The third opening 112-2 and the fourth opening 113-1 are blocked by seals 123 and 124, respectively.

[0136] The second opening 111 - 1 has a size smaller than the diameter of the top portion 2 - 1 a and larger than the diameter of the housing portion 2 - 1 b , and may have a hole diameter of, for example, 2 to 13 mm.

[0137] The fourth opening 113 - 1 of the outer cover 120 has a hole diameter that is sufficiently larger than the diameter of the top portion 2 - 1 a , and may have a hole diameter of, for example, 6 to 16 mm.

[0138] Thus, the magnetic recording and reproducing device 10-3 uses a top cover 14-1 having a sealed pin-shaped irreversible adsorption member 2-3 attached to the second opening 111-1. Furthermore, a side wall 132, made of, for example, resin, is provided around the opening 111-1a of the second opening 111-1 to surround the pin-shaped irreversible adsorption member 2-3. Furthermore, an air-permeable membrane filter 131-1 is provided on the end surface of the side wall 132. The remaining structure of the magnetic recording and reproducing device 10-3 is the same as that of the magnetic recording and reproducing device 10.

[0139] In the magnetic recording and reproducing device 10-3 according to the first embodiment, by using a pin-shaped irreversible adsorption member 2-3 that can be attached to the second opening 111-1 from the outside of the housing 101-1 via the fourth opening 113-1, the pin-shaped irreversible adsorption member 2-3 can be attached after the top cover 14 and the outer cover 120-2 are attached to the case 12 of the housing 101. Furthermore, by using the pin-shaped irreversible adsorption member 2-3 while the irreversible adsorbent 147 is inactive, the irreversible adsorbent 147 can be activated simply by penetrating the top portion 2-3a and the end portion 2-3c with the needle-shaped member 150 immediately before the housing 101-1 is sealed. Therefore, during the manufacture of the magnetic recording and reproducing device, the time that the irreversible adsorbent 147 of the pin-shaped irreversible adsorption member 2-3 is in contact with air can be minimized, minimizing the risk of degradation of its adsorption function. In the magnetic recording and reproducing device 10-3 according to the first embodiment, the contaminated gas can be fully removed by the irreversible adsorption member, so that defects such as head collisions are less likely to occur. In addition, the irreversible adsorption member 2-3 can be replaced with a new one without removing the top cover and outer cover during repairs.

[0140] Figure 18 A flowchart showing an example of a method for manufacturing the magnetic recording and reproducing device according to the third embodiment is shown.

[0141] The magnetic recording and reproducing device 10 - 3 can be manufactured as follows.

[0142] like Figure 16 As shown, first, components for the magnetic recording and reproducing device, such as a magnetic recording medium and a magnetic head (not shown), the top cover 14-1, and the outer cover 120-2 are installed in the case 12. Then, the cylindrical receiving portion 2-3b of the pin-shaped irreversible adsorption member 2-3 is inserted from the fourth opening 113-1 of the outer cover 120-2 into the second opening 111-1 of the top cover 14-1, thereby attaching the pin-shaped irreversible adsorption member 2-3 to the housing 101-1, and the magnetic recording and reproducing device is partially assembled (ST11).

[0143] Next, various tests of the magnetic recording and reproducing device are performed (ST12).

[0144] After the test, the air in the housing 101-1 is exhausted, and then an inert gas such as helium is introduced from the first opening 110-1 through the third opening 112-2 to adjust the internal pressure. Figure 16As shown, the needle-shaped component 150 is passed through from near the center of the top of the head 2-3a to near the center of the end 2-3c in the direction of the arrow, and holes are opened in the top of the head 2-3a and the end 2-3c. As a result, the sealed pin-shaped irreversible adsorption component 2-3 is opened (ST13), and the irreversible adsorbent 147 maintained in an inactive state isolated from the air is activated.

[0145] Then, if Figure 15 As shown, the third opening 112-2 and the fourth opening 113-1 of the outer cover 120-2 are closed with metal seals 123 and 124 made of aluminum, for example, to seal the interior of the housing 101-1 (ST14), thereby obtaining the magnetic recording and reproducing device 10-3.

[0146] According to another example of a method for manufacturing a magnetic recording and reproducing device according to the third embodiment, by using a pin-shaped irreversible adsorption member 2-3 that can be attached to the opening serving as a breathing hole from outside the housing in the magnetic recording and reproducing device 10-3, the pin-shaped irreversible adsorption member 2-3 can be attached after the top cover 14 and the outer cover 120-2 are attached to the case 12 of the housing 101. Furthermore, the pin-shaped irreversible adsorption member 2-3 can be attached while the irreversible adsorbent 147 is inactive. Even when testing is performed after installation, the adsorption performance does not degrade. The irreversible adsorbent 147 can be activated simply by penetrating the top portion 2-3a and the end portion 2-3c with the needle-shaped member 150 just before the housing 101-1 is sealed after the test. In this way, according to the manufacturing method of the magnetic recording and reproducing device involved in the third embodiment, the pin-type irreversible adsorption component 2-3 can be isolated from the air and maintained until the shell is about to be sealed, and the time that the pin-type irreversible adsorption component 2-3 is in contact with the air can be shortened as much as possible. Therefore, the adsorption performance of the pin-type irreversible adsorption component 2-3 used is difficult to decrease, and contaminant gases such as oxygen and siloxane can be fully adsorbed in the sealed magnetic recording and reproducing device 10-3.

[0147] Figure 19 A partially enlarged view showing another example of the structure of the magnetic recording and reproducing device according to the first embodiment.

[0148] In another example, the magnetic recording and reproducing device 10 - 3 ′ uses a pin-shaped irreversible attraction member as the irreversible attraction member and is attached to the second opening 111 - 1 .

[0149] As shown in the figure, in this magnetic recording and reproducing device 10-3', instead of the outer cover 120-2 having the fourth opening 113-1 without a step, an outer cover 120-3 having the fourth opening 113-2 with a step is provided. The fourth opening 113-2 has, for example, a two-stage aperture. The aperture of the second opening 113-2b on the ambient air side is larger than the aperture of the first opening 113-2a on the top cover 14 side. The area 120-3a surrounding the first opening 113-2a is shaped to extend toward the center of the first opening 113-2a, forming a stepped aperture. Furthermore, in the magnetic recording and reproducing device 10-3', the pin-shaped irreversible adsorption member 2-3 is installed so that it is inserted into the fourth opening 113-2 of the outer cover 120-3 and the second opening 111-1 of the top cover 14-1, with the top portion 2-3a of the pin-shaped irreversible adsorption member 2-3 supported by the area 120-3a surrounding the first opening 113-2a of the fourth opening 113-2 of the outer cover 120-3. For example, the first opening 113-2a of the fourth opening 113-2 of the outer cover 120-3 may be smaller than the diameter of the top portion 2-3a, for example, having a diameter of 2 to 13 mm. Furthermore, the second opening 113-2b may have a diameter sufficiently larger than the diameter of the top portion 2-1a, for example, having a diameter of 6 to 16 mm.

[0150] Thus, in the magnetic recording and reproducing device 10-3', the fourth opening 113-2 of the outer cover 120-3 has a stepped shape, and the area supporting the top portion 2-3a of the pin-shaped irreversible adsorption member 2-3 is located on the outer cover 120-3. The rest of the structure of the magnetic recording and reproducing device 10-3' is the same as that of the magnetic recording and reproducing device 10-3.

[0151] In the magnetic recording and reproducing device 10-3' according to the first embodiment, by using a pin-shaped irreversible adsorption member 2-3 that can be mounted from the outside of the housing 101-1 through the fourth opening 113-2 into the second opening 111-1, the pin-shaped irreversible adsorption member 2-3' can be mounted after the top cover 14-1 and the outer cover 120-3 are mounted on the case 12 of the housing 101-1. Furthermore, by using a pin-shaped irreversible adsorption member 2-3 in which the irreversible adsorbent 147 is inactive, the irreversible adsorbent 147 can be activated simply by penetrating the top portion 2-3a and the end portion 2-3c with the needle-shaped member 150 immediately before the housing 101-1 is sealed. Therefore, during the manufacture of the magnetic recording and reproducing device, the time that the irreversible adsorbent 147 of the pin-shaped irreversible adsorption member 2-3 is in contact with air can be minimized, minimizing the risk of degradation of its adsorption function. Thus, in the magnetic recording and reproducing device 10-3' according to the first embodiment, the contaminated gas can be fully removed by the irreversible adsorption member, thereby reducing the occurrence of defects such as head collision. In addition, the irreversible adsorption member 2-3 can be replaced with a new one without removing the top cover and outer cover during repairs.

[0152] In addition, the magnetic recording and reproducing device 10-3' uses an outer cover 120-3 having a fourth opening 113-2 with two levels of aperture instead of the outer cover 120-2 having a fourth opening 113-1 without a height difference, and the pin-type irreversible adsorption member 2-3' is installed in a manner such that its top portion 2-1a is supported by an area 120-3a around the first opening 113-2a of the fourth opening 113-2 provided in the outer cover 120-3 instead of being supported by an area 101d around the second opening 111-1b of the top cover 14. Except for these, the magnetic recording and reproducing device 10-3 can be manufactured in the same manner as the magnetic recording and reproducing device 10-3.

[0153] Example 5

[0154] Figure 20 It is a partial view of another example of a magnetic recording and reproducing device 10 - 4 to which a sealed irreversible adsorption member is applied.

[0155] Figure 21 It is a cross-sectional view showing the structure of a sealed bag-type irreversible adsorption member.

[0156] As shown in the figure, the sealed bag-type irreversible adsorption member 2-4 has a structure in which the irreversible adsorbent 107-2 is sealed in an airtight bag-shaped box body 145-4 such as a bag of an aluminum vapor deposition sheet or a PTS bag manufactured by Mitsubishi Gas Chemical Co., Ltd., and can be used in place of the sealed pin-type irreversible adsorption member 2-3. Figure 15The magnetic recording and reproducing device shown. Alternatively, in this case, instead of the resin sidewall 132, a sidewall 133 having a lower height than the resin sidewall 132 and located closer to the second opening 111-1 may be used. Furthermore, a permeable membrane filter 134, for example, may be provided on the end surface of the sidewall 133 on the interior side of the housing 101-1, sufficiently spaced from the second opening 111-1 to prevent the intrusion of dust and the like. Providing the membrane filter 134 through the sidewall 133 prevents damage to the membrane filter 134 when the needle-shaped member 150 penetrates the bag-type irreversible adsorption member 2-4.

[0157] Magnetic recording and reproducing device 10-4, similar to magnetic recording and reproducing device 10-3, uses a needle-shaped member 150 to penetrate the bag-shaped irreversible adsorption member 2-4 from near the center of one surface to near the center of the other surface, as indicated by the arrow. This allows the bag-shaped irreversible adsorption member 2-4 to be opened from its sealed state, activating the irreversible adsorbent that had been inactive and isolated from air. Subsequently, similar to magnetic recording and reproducing device 10-3, the fourth opening 113-1 can be sealed with a seal 124. This ensures a flow path between the interior of housing 101-1 and the interior of bag-shaped irreversible adsorption member 2-4, enabling sufficient adsorption of contaminated gases within housing 101-1.

[0158] In the magnetic recording and reproducing device 10-4 according to the first embodiment, by using a bag-type irreversible adsorption member 2-4 that can be attached to the second opening 111-1 from the outside of the housing 101-1 via the fourth opening 113-1, similarly to the magnetic recording and reproducing device 10-3, the bag-type irreversible adsorption member 2-4 can be attached after the top cover 14 and the outer cover 120-2 are attached to the case 12 of the housing 101. Furthermore, the bag-type irreversible adsorption member 2-4 can be attached while the irreversible adsorbent is inactive. The irreversible adsorbent can be activated simply by penetrating the bag-type irreversible adsorption member 2-4 with the needle-shaped member 150 just before the housing 101-1 is sealed. Therefore, during the manufacture of the magnetic recording and reproducing device, the time the irreversible adsorbent of the bag-type irreversible adsorption member 2-4 is in contact with air can be minimized, minimizing the risk of degradation of its adsorption function. In the magnetic recording and reproducing device 10-4 according to the first embodiment, the contaminated gas can be fully removed by the irreversible adsorption member, so that defects such as head collisions are less likely to occur. In addition, the irreversible adsorption member 2-4 can be replaced with a new one without removing the top cover or outer cover during repairs.

[0159] In addition, the magnetic recording and reproducing device 10-4 can apply the manufacturing method of the magnetic recording and reproducing device according to the third embodiment, and Figure 18The magnetic recording and reproducing device 10 - 3 shown in the flowchart is manufactured in the same manner.

[0160] In another example of the method for manufacturing a magnetic recording and reproducing device according to the third embodiment, by using a bag-type irreversible adsorption member 2-4 that can be attached to the opening serving as a breathing hole from outside the housing in the magnetic recording and reproducing device 10-4, the bag-type irreversible adsorption member 2-4 can be installed after the top cover 14-1 and the outer cover 120-2 are attached to the case 12 of the housing 101-1. Furthermore, the bag-type irreversible adsorption member 2-4 can be installed while the irreversible adsorbent is inactive. Even when testing is performed after installation, the adsorption performance does not degrade. The irreversible adsorbent can be activated simply by penetrating the bag-type irreversible adsorption member 2-4 with the needle-shaped member 150 immediately before the housing 101-1 is sealed after the test. In this way, according to the manufacturing method of the magnetic recording and reproducing device involved in the third embodiment, the bag-type irreversible adsorption component 2-4 can be isolated from the air and maintained until the shell is about to be sealed, and the time that the bag-type irreversible adsorption component 2-4 is in contact with the air can be shortened as much as possible. Therefore, the adsorption performance of the bag-type irreversible adsorption component 2-4 used is difficult to decrease, and the contaminant gases such as oxygen and siloxane can be fully adsorbed in the sealed magnetic recording and reproducing device 10-4.

[0161] Figure 22 This is a partial view of a magnetic recording and reproducing device 10 - 4 ′ to which another example of the sealed irreversible adsorption member is applied.

[0162] As shown in the figure, in this magnetic recording and reproducing device 10-4', instead of the outer cover 120-2 having the fourth opening 113-1 without a step, an outer cover 120-3 having the fourth opening 113-2 with a step is provided. The fourth opening 113-2 has, for example, a two-stage aperture. The aperture of the second opening 113-2b on the ambient air side is larger than the aperture of the first opening 113-2a on the top cover 14-1 side. The area 120-3a surrounding the first opening 113-2a is shaped to extend toward the center of the first opening 113-2a, forming a stepped aperture. Furthermore, in the magnetic recording and reproducing device 10-4', the bag-type irreversible adsorption member 2-4 is installed so that it is inserted into the fourth opening 113-2 of the outer cover 120-3, and the peripheral edge 2-4a of the bag-type irreversible adsorption member 2-4 is supported by the area 120-3a surrounding the first opening 113-2a of the fourth opening 113-2 of the outer cover 120-3. For example, the first opening 113-2a of the fourth opening 113-2 of the outer cover 120-3 may be smaller than the size of the bag-type irreversible adsorption member 2-4, for example, 4 to 15 mm, and may have an aperture diameter of, for example, 3 to 14 mm. Furthermore, the second opening 113-2b may have an aperture diameter sufficiently larger than the size of the bag-type irreversible adsorption member 2-2, for example, 5 to 16 mm.

[0163] Thus, in the magnetic recording and reproducing device 10-4', the fourth opening 113-2 of the outer cover 120-3 has a stepped shape, and the region 120-3a supporting the bag-shaped irreversible adsorption member 2-4 is located on the outer cover 120-3. The rest of the structure of the magnetic recording and reproducing device 10-4' is the same as that of the magnetic recording and reproducing device 10-4.

[0164] In the magnetic recording and reproducing device 10-4' according to the first embodiment, by using a bag-type irreversible adsorption member 2-4 that can be mounted from the outside of the housing 101-1 to the second opening 111-1 via the fourth opening 113-1, the bag-type irreversible adsorption member 2-4 can be mounted after the top cover 14 and the outer cover 120-3 are mounted on the case 12 of the housing 101. Furthermore, in the magnetic recording and reproducing device 10-4' according to the first embodiment, the bag-type irreversible adsorption member 2-4 can be mounted while the irreversible adsorbent is inactive. The irreversible adsorbent can be activated simply by penetrating the bag-type irreversible adsorption member 2-4 with the needle-shaped member 150 just before the housing 101-1 is sealed. Therefore, when manufacturing the magnetic recording and reproducing device 10-4', the time the irreversible adsorbent of the bag-type irreversible adsorption member 2-4 is in contact with air can be minimized, minimizing the risk of degradation of its adsorption function. In the magnetic recording and reproducing device 10-4' according to the first embodiment, the contaminated gas can be fully removed by the irreversible adsorption member, so that defects such as head collision are less likely to occur. In addition, the irreversible adsorption member 2-4 can be replaced with a new one without removing the top cover and outer cover during repairs.

[0165] In addition, the magnetic recording and reproducing device 10-4' can be applied as follows Figure 18 The method for manufacturing the magnetic recording and reproducing device according to the third embodiment shown in the flowchart is manufactured in the same manner as the magnetic recording and reproducing device 10 - 4 .

[0166] When using another example of the method for manufacturing a magnetic recording and reproducing device according to the third embodiment, by using a bag-type irreversible adsorption member 2-4 that can be attached to the opening serving as a breathing hole from outside the housing in the magnetic recording and reproducing device 10-4', the bag-type irreversible adsorption member 2-4 can be installed after the top cover 14-1 and the outer cover 120-2 are attached to the case 12 of the housing 101-1. Furthermore, the bag-type irreversible adsorption member 2-4 can be installed while the irreversible adsorbent is inactive. Even when testing is performed after installation, the adsorption performance does not decrease. The irreversible adsorbent can be activated simply by penetrating the bag-type irreversible adsorption member 2-4 with the needle-shaped member 150 just before the housing 101-1 is sealed after the test. In this way, according to the manufacturing method of the magnetic recording and reproducing device involved in the third embodiment, the bag-type irreversible adsorption component 2-4 can be isolated from the air and maintained until the shell is about to be sealed, and the time that the bag-type irreversible adsorption component 2-4 is in contact with the air can be shortened as much as possible. Therefore, the adsorption performance of the bag-type irreversible adsorption component 2-4 used is difficult to decrease, and contaminant gases such as oxygen and siloxane can be fully adsorbed in the sealed magnetic recording and reproducing device 10-4'.

[0167] While several embodiments of the present invention have been described above, 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 can be omitted, replaced, or modified without departing from the spirit of the invention. These embodiments and their variations are intended to be within the scope and spirit of the invention and are also intended to be within the scope of the invention as set forth in the claims and their equivalents.

Claims

1. A magnetic recording and reproducing device, The magnetic recording and reproducing device comprises: a sealed housing and an irreversible adsorption member, The housing includes a box body for the magnetic recording and reproducing device, a top cover covering the box body and including a first opening, and an outer cover covering the box body on the top cover. The irreversible adsorption component is arranged in the first opening and the inner side of the top cover to accommodate the irreversible adsorbent. The outer cover includes a second opening and a sealing member, wherein the second opening is arranged at a position opposite to the first opening and has a second size larger than the first size of the top of the irreversible adsorption member, and the sealing member seals the shell and is arranged on the outside of the second opening.

2. The magnetic recording and reproducing device according to claim 1, The irreversible adsorption member includes the top portion, a storage portion communicating with the top portion and provided to protrude from the inner surface of the top cover, and the irreversible adsorbent stored in the storage portion. The top portion has the first size that is larger than the third size of the first opening, and is supported by a region surrounding the first opening of the top cover.

3. The magnetic recording and reproducing device according to claim 2, The third size is the diameter of the first opening.

4. The magnetic recording and reproducing device according to claim 2, The storage portion is a cylindrical storage portion.

5. The magnetic recording and reproducing device according to claim 1, The invention further comprises: a side wall provided around the inner opening of the first opening and surrounding the irreversible adsorption member; and an air-permeable membrane filter provided on an end surface of the side wall inside the top cover.

6. The magnetic recording and reproducing device according to claim 1, The first size is the diameter of the top of the head.

7. The magnetic recording and reproducing device according to claim 1, The second size is the diameter of the second opening.

8. The magnetic recording and reproducing device according to claim 1, The top of the head is a circular plate-shaped top of the head.

Images