Hard disk reading and writing device

Abstract

The technical solution of the present invention provides a hard disk read-write device, including a disk and a magnetic head located above the disk, the magnetic head including a cylindrical magnet and two inwardly inclined and symmetrically arranged magnetic feet arranged at the lower end of the cylindrical magnet, a negative pressure cavity for storing magnetic fluid is arranged inside the cylindrical magnet, and a liquid outlet pipe connected to the negative pressure cavity is arranged between the two magnetic feet. When the magnetic head is working, the magnetic feet generate magnetism to suck the magnetic fluid out of the negative pressure cavity and clamp it in the gap between the magnetic feet. The magnetic fluid contacts the surface of the disk, and the magnetic particles in the magnetic fluid repair the magnetism of the disk surface. When the magnetic head is finished working, the negative pressure in the negative pressure cavity can automatically suck the magnetic fluid back from the gap between the magnetic feet. The technical solution of the present invention is based on the characteristics of the magnetic fluid, has a simple structure, and the magnetic head has the function of repairing the magnetism of the disk, which improves the reliability of the hard disk and extends the service life of the hard disk.

Description

Technical Field

[0001] The present invention relates to the technical field of data storage, and in particular to a hard disk reading and writing device. Background Art

[0002] A hard disk is a data storage device that is composed of a disk, a magnetic head, a disk spindle, and a control motor. The magnetic particles on the disk can provide unlimited data recording and erasing, the disk can achieve a high-speed rotation of several thousand revolutions per minute, and the magnetic head can be positioned at a specified position on the disk to read and write data.

[0003] Since the disk rotates at high speed during read and write operations, the magnetic head may rub against the disk. Once friction occurs, the friction part of the disk will be damaged and cannot be used again. The hard disk head in the prior art lacks a design that can reduce the friction between the magnetic head and the disk and repair the damaged part of the disk. The hard disk has low reliability and short life.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a hard disk read-write device, aiming to solve the technical problems that the existing hard disk has no self-repair function, low reliability and short life.

[0006] The technical solution of the present invention is as follows:

[0007] A hard disk read-write device includes a disk and a magnetic head located above the disk, the magnetic head includes a cylindrical magnet and two inwardly inclined and symmetrically arranged magnetic feet arranged at the lower end of the cylindrical magnet, a negative pressure cavity for storing magnetic fluid is arranged inside the cylindrical magnet, and a liquid outlet pipe connected to the negative pressure cavity is arranged between the two magnetic feet.

[0008] The hard disk read-write device further includes a magnetic fluid cooling component, which includes a reservoir for storing magnetic fluid, a magnetic fluid cooling pipe connected to the reservoir, and a cooling mechanism in contact with the magnetic fluid cooling pipe, and the magnetic fluid cooling pipe includes a winding pipe wound around the surface of the cylindrical magnet.

[0009] The hard disk read-write device, wherein the magnetic fluid cooling pipe also includes a first cooling pipe and a second cooling pipe located on both sides of the storage and connected to the storage, and the cooling mechanism is arranged below the first cooling pipe and the second cooling pipe.

[0010] In the hard disk read-write device, the first cooling pipe and the second cooling pipe are both pipes arranged in an S shape.

[0011] The hard disk read-write device further includes an installation box for encapsulating the magnetic fluid cooling assembly, the installation box includes a Y-shaped shell and a Y-shaped top cover, the first cooling pipe and the second cooling pipe are respectively arranged in the left oblique part and the right oblique part of the Y-shaped shell, the reservoir is arranged in the center of the Y-shaped shell, and a magnetic head mounting seat is arranged in the vertical part of the Y-shaped shell, and the first cooling pipe, the second cooling pipe, the reservoir and the magnetic head mounting seat are all covered in the Y-shaped shell through the Y-shaped top cover.

[0012] The hard disk read-write device, wherein the magnetic head mounting seat comprises a first accommodating cavity and an annular sheet arranged around the outside of the accommodating cavity, and the first accommodating cavity is provided with a through hole for the winding pipe to pass through.

[0013] The hard disk read-write device, wherein the bottom end of the first accommodating cavity is provided with an internal thread, the outside of the cylindrical magnet is provided with an external thread, and the cylindrical magnet is connected to the first accommodating cavity through a thread.

[0014] The hard disk read-write device, wherein the cooling mechanism includes a semiconductor cooling chip, a plurality of energy conduction blocks arranged above the semiconductor cooling chip, and a plurality of heat dissipation fins arranged below the semiconductor cooling chip.

[0015] The hard disk read-write device, wherein the storage includes a second accommodating chamber for storing magnetic fluid, a sealing cover arranged above the second accommodating chamber, and a filtering structure arranged at the lower end of the sealing cover.

[0016] The hard disk read-write device, wherein the disk is provided with a data recording area and a head parking area, the disk surface of the data recording area is provided with a hydrophilic or oleophilic film, and the disk surface of the head parking area is provided with a hydrophobic or oleophobic film.

[0017] Beneficial effects: The technical solution of the present invention provides a hard disk read-write device, including a disk and a magnetic head located above the disk, the magnetic head including a cylindrical magnet and two inwardly inclined and symmetrically arranged magnetic feet arranged at the lower end of the cylindrical magnet, the interior of the cylindrical magnet is provided with a negative pressure cavity for storing magnetic fluid, and a liquid outlet pipe connected to the negative pressure cavity is arranged between the two magnetic feet. When the magnetic head is working, the magnetic feet generate magnetism to suck the magnetic fluid out of the negative pressure cavity and clamp it in the gap between the magnetic feet. The magnetic fluid contacts the surface of the disk, and the magnetic particles in the magnetic fluid repair the magnetism of the disk surface. When the magnetic head is finished working, the negative pressure in the negative pressure cavity can automatically suck the magnetic fluid back from the gap between the magnetic feet. The technical solution of the present invention is based on the characteristics of the magnetic fluid, and has a simple structure. The magnetic head has the function of repairing the magnetism of the disk, which improves the reliability of the hard disk and extends the service life of the hard disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a preferred hard disk read-write device of the present invention.

[0019] Figure 2 This is a cross-sectional structural diagram of a preferred magnetic head of the present invention.

[0020] Figure 3 The figure is a schematic diagram of a preferred magnetic fluid cooling component of the present invention.

[0021] Figure 4 The figure is a schematic diagram of the internal installation structure of a preferred Y-shaped housing of the present invention.

[0022] Figure 5 It is a schematic diagram of a preferred cooling mechanism of the present invention.

[0023] Figure 6 This is a cross-sectional structural diagram of a preferred head mounting seat of the present invention.

[0024] Figure 7 This is a cross-sectional structural diagram of a preferred storage device of the present invention. DETAILED DESCRIPTION

[0025] The present invention provides a hard disk read-write device. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] See also Figure 1 The present invention provides a hard disk read-write device, comprising a disk 10 and a magnetic head 20 located above the disk, see Figure 2 The magnetic head includes a cylindrical magnet 30 and two inwardly inclined and symmetrically arranged magnetic feet 40 arranged at the lower end of the cylindrical magnet. A negative pressure chamber 50 for storing magnetic fluid is arranged inside the cylindrical magnet, and a liquid outlet pipe 60 connected to the negative pressure chamber is arranged between the two magnetic feet.

[0028] During specific use, the magnetic fluid is first stored in the negative pressure chamber of the cylindrical magnet. The method of storing the magnetic fluid is to first invert the cylindrical magnet, and then inject preheated magnetic fluid through the liquid phase needle. The volume of the magnetic fluid does not exceed two-thirds of the negative pressure chamber. Then, it is placed upright and a small amount of gas is extracted or injected through the gas phase needle to adjust the negative pressure.

[0029] Among them, the main function of the magnetic fluid is to reduce the friction between the magnetic feet and the disk through the lubricant in the magnetic fluid, and to repair the disk surface damaged by friction through the nano-iron tetroxide magnetic particles in the magnetic fluid. The nano-iron tetroxide particles are mainly prepared by solid phase reaction method or chemical co-precipitation method. The prepared nano-iron tetroxide particles are dispersed into deionized water, kerosene, engine oil, phosphate solution, fluoroether oil and other base carrier liquids through dispersants to obtain the required magnetic fluid. Adding emulsifiers and lubricants to the magnetic fluid can adjust the uniformity and viscosity of the magnetic fluid.

[0030] See also Figure 3 The hard disk read-write device also includes a magnetic fluid cooling component 70, which includes a storage tank 80 for storing magnetic fluid, a magnetic fluid cooling pipe 90 connected to the storage tank, and a cooling mechanism 100 in contact with the magnetic fluid cooling pipe, and the magnetic fluid cooling pipe 90 includes a winding pipe 110 wound around the surface of the cylindrical magnet.

[0031] In this embodiment, magnetic fluid is used as the heat exchange medium in the heat exchange process. The magnetic fluid generates a thermal magnetic flow effect under the action of the magnetic field of the magnetic head 20, so that the magnetic fluid flows through the winding pipe 110 and the magnetic fluid cooling pipe part in contact with the cooling mechanism 100 and circulates back and forth. When the magnetic fluid flows through the winding pipe 110, it absorbs the heat generated by the cylindrical magnet 30 and becomes a high-temperature magnetic fluid. When the high-temperature magnetic fluid flows through the magnetic fluid cooling pipe part in contact with the cooling mechanism 100, the cooling mechanism can cool the high-temperature magnetic fluid, thereby realizing convection heat exchange; that is, the magnetic fluid cooling component provided in this embodiment can effectively transport the heat generated by the magnetic head 20 during the information reading and writing process to the cooling mechanism for heat exchange, so as to realize rapid cooling of the magnetic head 20, thereby effectively improving the information reading and writing accuracy and the service life of the hard disk reading and writing device.

[0032] In this embodiment, the negative pressure chamber 50 in the cylindrical magnet 30 has two purposes. One is lubrication. Due to the negative pressure, a droplet will come out only when the magnetic head is reading or writing, and it will be sucked back by the negative pressure after the reading and writing are completed. The other purpose is to bring heat back to the magnetic fluid during the process of droplet suction and suction (because the winding pipe 110 cannot be directly connected to the magnetic foot). This is actually more effective in reducing the temperature of the magnetic foot, which is equivalent to the temperature of the magnetic foot being brought to the negative pressure chamber 50 and then cooled through the magnetic fluid cooling pipe.

[0033] See also Figure 4 In a specific embodiment, the magnetic fluid cooling pipe 90 also includes a first cooling pipe 120 and a second cooling pipe 130 located on both sides of the reservoir and connected to the reservoir 80, and the cooling mechanism 100 is disposed below the first cooling pipe and the second cooling pipe.

[0034] See also Figure 5 Taking the cooling mechanism under the first cooling pipe as an example, the cooling mechanism includes a plurality of energy conduction blocks 140 directly in contact with the first cooling pipe, a semiconductor cooling chip 150 located under the energy conduction block 140, and a plurality of heat dissipation fins 160 located under the semiconductor cooling chip 150. In this embodiment, after the semiconductor cooling chip 150 is connected to the chip power supply, it can be cooled quickly. At this time, the energy conduction block 140 is equivalent to a cold conduction block. When the high-temperature magnetic fluid that absorbs the heat of the magnetic head 20 flows through the first cooling pipe 120, the energy conduction block 140 can quickly conduct the cold air generated by the semiconductor cooling chip 150 to the high-temperature magnetic fluid, so that the temperature of the high-temperature magnetic fluid drops rapidly, so as to achieve efficient convection heat exchange.

[0035] In this embodiment, the energy conduction block 140 can also effectively prevent the semiconductor cooling chip 150 from directly contacting the first cooling pipe 120, thereby preventing the magnetic fluid inside the first cooling pipe 120 from condensing, thereby hindering or blocking the flow of the magnetic fluid in the first cooling pipe 120. As an example, three energy conduction blocks 140 can be arranged above the semiconductor cooling chip 150, and three heat dissipation fins 160 can be arranged below the semiconductor cooling chip 150. The heat dissipation fins 160 are mainly used to dissipate the heat generated by the semiconductor cooling chip 150 during the cooling process.

[0036] In some specific embodiments, in order to improve the convective heat transfer efficiency of the magnetic fluid cooling assembly 70, cooling mechanisms 100 may be provided at both upper and lower ends of the first cooling pipe 120 and the second cooling pipe 130 to double the heat transfer efficiency of the magnetic fluid cooling assembly 70.

[0037] See also Figure 4 In a specific embodiment, the first cooling pipe 120 and the second cooling pipe 130 are pipes arranged in an S shape. After absorbing the heat of the magnetic head 20, the magnetic fluid in the winding pipe 110 will flow through the first cooling pipe 120 and the second cooling pipe 130 in sequence. In this embodiment, by setting the first cooling pipe 120 and the second cooling pipe 130 in an S shape, the contact area between the cooling pipe and the cooling mechanism can be effectively increased, thereby effectively improving the heat exchange efficiency of the magnetic fluid cooling component, achieving rapid cooling of the magnetic head 20, and further achieving fine information reading and writing of the magnetic head and the service life of the hard disk read-write device.

[0038] In a specific embodiment, see Figure 1 The hard disk read-write device further comprises a mounting box 170 for encapsulating the magnetic fluid cooling assembly, and the mounting box 170 comprises a Y-shaped housing 180 and a Y-shaped top cover 190. Figure 4 The first cooling pipe 120 and the second cooling pipe 130 are respectively arranged in the left oblique part 200 and the right oblique part 210 of the Y-shaped shell, the reservoir is arranged in the center of the Y-shaped shell, and a magnetic head mounting seat 230 is arranged in the vertical part 220 of the Y-shaped shell. The cooling mechanism, the reservoir and the magnetic head mounting seat are all covered in the Y-shaped shell by the Y-shaped top cover. In this embodiment, the shape of the shell of the installation box is set to be Y-shaped, because the cooling pipe can be arranged in close proximity to the contour of the Y-shaped shell to make the cooling pipe longer, increase the heat exchange area, and make the overall structure of the component more compact.

[0039] See also Figure 6 In a specific embodiment, the head mounting seat includes a first accommodating cavity 240 and an annular sheet 250 arranged around the outside of the accommodating cavity, and the first accommodating cavity is provided with a through hole 260 for the winding pipe 110 to pass through.

[0040] In this embodiment, the head mounting seat 230 is conveniently fixedly installed inside the Y-shaped housing 180 through the annular sheet 250; the upper side and the lower side of the first accommodating cavity 240 are each provided with two through holes 260, and the two ends of the winding pipe 110 are first bent through the two perforations on the lower side to extend into the interior of the first accommodating cavity 240, and then pass through the two perforations on the upper side to the outside of the first accommodating cavity 240, and the two ends of the winding pipe 110 are respectively connected with a cooling pipe adapter 270 after passing through the outside of the first accommodating cavity 240, and the winding pipe 110 is connected with the first cooling pipe 120 and the second cooling pipe 130 through the cooling pipe adapter 270 to form a circulation path for the magnetic fluid, and the bottom end of the first accommodating cavity 240 is provided with a signal interface 280 for connecting the input and output signal lines of the magnetic head.

[0041] In a specific implementation, the bottom end of the first accommodating cavity of the head mounting seat 230 is provided with an internal thread, see Figure 2 The outside of the cylindrical magnet 30 is provided with an external thread, and the cylindrical magnet is connected to the first accommodating cavity through a thread.

[0042] See also Figure 7In a specific embodiment, the storage device 80 includes a second accommodating chamber 290 for storing magnetic fluid, a sealing cover 300 disposed above the second accommodating chamber, and a filtering structure 310 disposed at the lower end of the sealing cover.

[0043] In this embodiment, the sealing cover 300 can prevent the magnetic fluid located inside the second accommodating chamber 290 from leaking, and the filtering structure 310 is mainly used to filter the micro-nano aggregated particles formed during the flow of the magnetic fluid and the dust deposited in the flow channel, thereby effectively preventing the magnetic fluid from being obstructed during the flow process.

[0044] In some specific embodiments, Figure 7 As shown, the filtering structure 310 includes a plurality of filter plates 320 arranged in a matrix, and a plurality of filter holes 330 are provided on the filter plates 320. The size of the filter holes 330 can be set according to requirements.

[0045] In general, the magnetic fluid cooling hard disk of the present invention has a simple structure, compact design, relatively independent parts, convenient maintenance and repair, good interchangeability of various parts, modularization, serialization and rapid design can be achieved, and there are no special requirements for the working environment, and it can adapt to various special environments.

[0046] like Figure 1 As shown, in a specific embodiment, a data recording area 340 and a head parking area 350 are provided on the disk 10. The disk surface of the data recording area is provided with a hydrophilic or oleophilic film, and the disk surface of the head parking area is provided with a hydrophobic or oleophobic film. In the specific configuration, the head parking area 350 is provided at the edge of the disk 10, and the head parking area 350 surrounds the data recording area 340. When the hard disk is working, the magnetic head 20 is suspended on the data recording area 340 to write and read data, and when the hard disk stops working, the magnetic head 20 is placed in the head parking area 350.

[0047] In summary, the hard disk read-write device provided by the technical solution of the present invention includes a disk and a magnetic head located above the disk, the magnetic head includes a cylindrical magnet and two inwardly inclined and symmetrically arranged magnetic feet arranged at the lower end of the cylindrical magnet, the interior of the cylindrical magnet is provided with a negative pressure cavity for storing magnetic fluid, and a liquid outlet pipe connected to the negative pressure cavity is arranged between the two magnetic feet. When the magnetic head is working, the magnetic feet generate magnetism to suck the magnetic fluid out of the negative pressure cavity and clamp it in the gap between the magnetic feet. The magnetic fluid contacts the surface of the disk, and the magnetic particles in the magnetic fluid repair the magnetism of the disk surface. When the magnetic head is finished working, the negative pressure in the negative pressure cavity can automatically suck the magnetic fluid back from the gap between the magnetic feet. The technical solution of the present invention is based on the characteristics of the magnetic fluid, and has a simple structure. The magnetic head has the function of repairing the magnetism of the disk, which improves the reliability of the hard disk and extends the service life of the hard disk.

[0048] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A hard disk read-write device, characterized in that: The magnetic head comprises a disk and a magnetic head located above the disk, wherein the magnetic head comprises a cylindrical magnet and two magnetic feet arranged at the lower end of the cylindrical magnet and inclined inward and symmetrically arranged, a negative pressure cavity for storing magnetic fluid is arranged inside the cylindrical magnet, and a liquid outlet pipe connected to the negative pressure cavity is arranged between the two magnetic feet; The disk is provided with a data recording area and a magnetic head parking area, the disk surface of the data recording area is provided with a hydrophilic or oleophilic film, and the disk surface of the magnetic head parking area is provided with a hydrophobic or oleophobic film; The magnetic head parking area is arranged at the edge of the disk, and the magnetic head parking area surrounds the data recording area.

2. The hard disk read-write device according to claim 1, characterized in that: It also includes a magnetic fluid cooling component, which includes a reservoir for storing magnetic fluid, a magnetic fluid cooling pipe connected to the reservoir, and a cooling mechanism in contact with the magnetic fluid cooling pipe, and the magnetic fluid cooling pipe includes a winding pipe wound around the surface of the cylindrical magnet.

3. The hard disk read-write device according to claim 2, characterized in that: The magnetic fluid cooling pipeline also includes a first cooling pipeline and a second cooling pipeline located on both sides of the reservoir and connected to the reservoir, and the cooling mechanism is disposed below the first cooling pipeline and the second cooling pipeline.

4. The hard disk read-write device according to claim 3, characterized in that: The first cooling pipe and the second cooling pipe are both pipes arranged in an S shape.

5. The hard disk read-write device according to claim 3 or 4, characterized in that: It also includes an installation box for encapsulating the magnetic fluid cooling assembly, the installation box includes a Y-shaped shell and a Y-shaped top cover, the first cooling pipe and the second cooling pipe are respectively arranged in the left oblique part and the right oblique part of the Y-shaped shell, the reservoir is arranged in the center of the Y-shaped shell, and a head mounting seat is arranged in the vertical part of the Y-shaped shell, and the first cooling pipe, the second cooling pipe, the reservoir and the head mounting seat are all covered in the Y-shaped shell through the Y-shaped top cover.

6. The hard disk read-write device according to claim 5, characterized in that: The magnetic head mounting seat comprises a first accommodating cavity and an annular sheet arranged around the outside of the accommodating cavity, and the first accommodating cavity is provided with a through hole for the winding pipe to pass through.

7. The hard disk read-write device according to claim 6, characterized in that: The bottom end of the first accommodating cavity is provided with an internal thread, the exterior of the cylindrical magnet is provided with an external thread, and the cylindrical magnet is connected to the first accommodating cavity via threads.

8. The hard disk read-write device according to claim 3 or 4, characterized in that: The cooling mechanism comprises a semiconductor cooling chip, a plurality of energy conduction blocks arranged above the semiconductor cooling chip, and a plurality of heat dissipation fins arranged below the semiconductor cooling chip.

9. The hard disk read-write device according to claim 2, characterized in that: The storage device comprises a second accommodating chamber for storing magnetic fluid, a sealing cover arranged above the second accommodating chamber, and a filtering structure arranged at the lower end of the sealing cover.

Images