KR20130045477A - Base assembly for motor and hard disk drive including the same - Google Patents

Base assembly for motor and hard disk drive including the same Download PDF

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Publication number
KR20130045477A
KR20130045477A KR1020110109703A KR20110109703A KR20130045477A KR 20130045477 A KR20130045477 A KR 20130045477A KR 1020110109703 A KR1020110109703 A KR 1020110109703A KR 20110109703 A KR20110109703 A KR 20110109703A KR 20130045477 A KR20130045477 A KR 20130045477A
Authority
KR
South Korea
Prior art keywords
base
motor
fastening hole
flexible printed
printed circuit
Prior art date
Application number
KR1020110109703A
Other languages
Korean (ko)
Inventor
최태영
Original Assignee
삼성전기주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020110109703A priority Critical patent/KR20130045477A/en
Publication of KR20130045477A publication Critical patent/KR20130045477A/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508—Magnetic discs
    • G11B2220/2516—Hard disks
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/05—Flexible printed circuits [FPCs]
    • H05K2201/058—Direct connection between two or more FPCs or between flexible parts of rigid PCBs

Abstract

Motor base assembly according to an embodiment of the present invention is a base formed by press working; And a flexible printed circuit unit having a connector for connecting a head stack assembly (HSA) coupled to the base to a main circuit board disposed on a bottom surface of the base. The substrate has at least one fastening hole communicating with each other, and the base, the flexible printed circuit unit and the main circuit board may be coupled to each other by inserting a bolt into the fastening hole and then fastening a nut to the bolt.

Description

Base assembly for motor and hard disk drive including the same

The present invention relates to a motor base assembly of the present invention and a hard disk drive including the same, and more particularly, to a motor base assembly and a hard disk drive including the same, having improved coupling structure with a base, a flexible printed circuit, and a main circuit board. It is about.

A hard disk drive (HDD), which is one of information storage devices of a computer, is a device that reproduces data stored on a disk using a magnetic head or records data on a disk.

In such a hard disk drive, a base is provided with a head drive unit, that is, a head stack assembly (HSA), which allows the magnetic head to be moved on a disc, and the magnetic head rises a predetermined height from the recording surface of the disc by the head drive unit. It performs its function while moving to the desired position.

Conventionally, in manufacturing a base provided in a hard disk drive, aluminum (Al) is produced by a post-processing method that die-casting aluminum and then remove burrs generated by die-casting. have.

However, the conventional die casting method requires a high temperature and a high pressure to require a large amount of energy in the process because the forging aluminum (Al) is injected in a molten state to form a shape, .

In addition, there is a limitation in manufacturing a large number of bases in one mold in terms of the life of the die-casting die, and the base by the die-casting process has a problem that the dimensional accuracy is not good.

So, in order to solve the problem of the die-casting process, the base was manufactured using the press method, but in the case of the press method, the base material has a uniform thickness by the process of pressurizing and bending the plate. There is a limit.

Therefore, in the case of the base manufactured by the press method, there is a problem that it is difficult to implement a fastening portion for coupling with the components for driving the hard disk drive.

In addition, when a plurality of fastening portions are to be formed adjacent to each other for coupling with a component for driving a hard disk drive, there is a problem that it is very difficult to form the plurality of fastening portions as described above in the base manufactured by the press method.

Therefore, there is an urgent need to research to manufacture an improved hard disk drive by overcoming the limitation of having a uniform thickness even if the base is manufactured by a press method.

SUMMARY OF THE INVENTION An object of the present invention is to provide a base assembly for a motor and a hard disk drive including the same, which facilitate the fastening of a base manufactured by press working with a component for driving the hard disk drive to improve performance and lifespan. will be.

Motor base assembly according to an embodiment of the present invention is a base formed by press working; And a flexible printed circuit unit having a connector for connecting a head stack assembly (HSA) coupled to the base to a main circuit board disposed on a bottom surface of the base. The substrate has at least one fastening hole communicating with each other, and the base, the flexible printed circuit unit and the main circuit board may be coupled to each other by inserting a bolt into the fastening hole and then fastening a nut to the bolt.

The fastening hole formed in the base of the base assembly for a motor according to an embodiment of the present invention may be formed by a burring process.

An outer wall defining a fastening hole formed in the base of the base assembly for a motor according to an embodiment of the present invention may protrude toward the main circuit board.

A sealing part for sealing the fastening hole may be further included between the base of the motor base assembly and the flexible printed circuit part according to an embodiment of the present invention.

The fastening holes of the motor base assembly according to an embodiment of the present invention may be formed in plural, and may be formed to have the longest distance between the fastening holes within the range of the flexible printed circuit unit.

Hard disk drive according to another embodiment of the present invention is a motor base assembly; A magnet disposed on the motor base to provide driving force to the head stack assembly (HSA); And a spindle motor coupled to the motor base to rotate the disk. It may include.

According to the base assembly for a motor and the hard disk drive including the same according to the present invention, the fastening between the base manufactured by press working and a component for driving the hard disk drive can be simple and robust.

In addition, the sealing capabilities of hard disk drives can be improved to maximize performance and lifespan.

1 is a schematic exploded perspective view showing a hard disk drive including a base assembly for a motor according to an embodiment of the present invention.
Figure 2 is a schematic perspective view showing a base assembly for a motor according to an embodiment of the present invention.
3 is a schematic enlarged cross-sectional view of Y in FIG. 2.
4 to 6 is a schematic perspective view and a cross-sectional view showing a manufacturing process of the base assembly for a motor according to an embodiment of the present invention (only part X of Figure 1).

Hereinafter, with reference to the drawings will be described in detail a specific embodiment of the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

1 is a schematic exploded perspective view showing a hard disk drive including a base assembly for a motor according to an embodiment of the present invention, Figure 2 is a schematic perspective view showing a base assembly for a motor according to an embodiment of the present invention; 3 is a schematic enlarged cross-sectional view of Y in FIG. 2.

1 to 3, a hard disk drive 600 including a base assembly 10 (hereinafter, referred to as a base assembly) for a motor according to an embodiment of the present invention includes a base assembly 10 including a base 100. , The magnets 210 and 220 providing a driving force to the head stack assembly (HSA) 200 and the spindle motor 300 to rotate the disk D.

The base assembly 10 includes a flexible priented circuit assembly (FPCA) 250 electrically connected to the main circuit board 400 for controlling the operation of the base 100 and the head stack assembly (HSA) 200. It may include.

In the hard disk drive 600 according to the present invention, the base 100 may refer to a housing forming an appearance together with a cover 500, and includes a disk arranging unit 110 and a connector arranging unit 120. can do.

Here, the disk placement unit 110 and the connector placement unit 120 may manufacture the basic shape by press working, and then may manufacture the final base 100 through bending or cutting, which is additional processing.

 That is, the base 100 according to an embodiment of the present invention is a post-processing method for removing burrs generated by die-casting after die-casting of aluminum (Al). Unlike that produced by a single process, it can be produced by a single process or by further processing by press working.

That is, the disk arrangement 110 and the connector arrangement portion 120 constituting the base 100 is a cold rolled steel sheet (SPCC, SPCE, etc.), hot rolled steel sheet, stainless steel or lightweight alloy steel sheet such as boron or magnesium alloy May be placed in a press mold and manufactured by a predetermined press pressure.

Therefore, the base 100 according to the embodiment of the present invention may be manufactured by press working, thereby minimizing process time and energy consumption, and as a result, may improve production capacity.

Here, the disk arrangement unit 110 is a portion in which the disk (D) coupled to the spindle motor 300 is disposed may be formed in a circular shape as a whole to correspond to the shape of the disk (D).

In detail, the disk arranging unit 110 may mean an area in which a portion of the base 100 protrudes downward in the axial direction to accommodate the disk D.

In addition, the connector arrangement unit 120 of the base 100 according to an embodiment of the present invention is coupled to the flexible printed circuit unit (FPCA, 250) having a connector (not shown) connected to the main circuit board 400 It may be part.

Here, the flexible printed circuit unit FPCA 250 may be a component of the head stack assembly HSA 200, and the head stack assembly HSA 200 may be disposed on the bottom surface of the base 100. A connector (not shown) for connecting to 400 may be provided.

Meanwhile, the head stack assembly (HSA) 200 mounts a magnetic head and moves the magnetic head to a predetermined position to record data on the disk D or to read data recorded on the disk D. It can be a configuration.

In addition, the head stack assembly HSA 200 moves the magnetic head to a predetermined position of the disk D by a voice coil motor VCM including a coil 260 and upper and lower magnets 210 and 220. You can.

Here, the upper and lower magnets 210 and 220 disposed on the upper and lower sides of the coil 260 provided to the voice coil motor VCM are respectively upper and lower for increasing magnetic flux density and fixing with the base 100. It may be combined with the yoke (230, 240).

The voice coil motor VCM is controlled by a servo control system, and a current input by the coil 260 provided to the voice coil motor VCM and a magnetic field formed by the upper and lower magnets 210 and 220. By rotating the head stack assembly (HSA, 200) about the pivot axis 112 in the direction according to the Fleming's left hand law.

Here, in the hard disk drive 600 according to the present invention, the disk D starts to rotate when an operation start command is input, and the voice coil motor VCM rotates the swing arm counterclockwise to rotate the magnetic head. Move on the recording surface of D).

On the contrary, when an operation stop command of the hard disk drive 600 according to an embodiment of the present invention is input, the voice coil motor VCM rotates the swing arm clockwise so that the magnetic head leaves the disk D. .

The magnetic head off the recording surface of the disk D is parked by a lamp 270 provided on the outside of the disk D.

Here, the lamp 270 may park the magnetic head and stably read the data of the disk D by allowing the magnetic head to be spaced apart by a predetermined interval when the magnetic head moves to the disk D.

In addition, the head stack assembly HSA 200 may be electrically connected to the main circuit board 400 disposed on the bottom surface of the base 100 to provide a driving force to the voice coil motor VCM to rotate the swing arm. .

This may be implemented through a flexible printed circuit unit FPCA 250 having a connector (not shown), and a connector (not shown) of the flexible printed circuit unit FPCA 250 may be connected to the main circuit board 400. Electrically connected.

Here, a connector through portion 125 may be formed in the connector arrangement portion 120 of the base 100 so that the connector (not shown) is electrically connected to the main circuit board 400. The connector (not shown) may pass through 125.

In addition, the flexible printed circuit unit 250 may include a fastening hole H to fix the connector (not shown) passing through the connector through part 125 formed in the connector arrangement part 120 and the base 100. .

That is, the flexible printed circuit unit 250, the connector arranging unit 120 of the base 100, and the main circuit board 400 may include fastening holes H that communicate with each other, and the fastening holes H in one direction. Insert the bolt (B) into the bolt (N) in the other direction and then tighten the bolt (B) by the flexible printed circuit unit 250, the connector arrangement portion 120 and the main circuit board 400 of the base 100 May be fastened to each other.

Here, the flexible printed circuit unit 250, the connector arrangement portion 120 of the base 100 and the fastening hole (H) that communicates with the main circuit board 400 may be formed in plural, between the fastening holes (H) The separation distance may be formed to be the longest.

In addition, the fastening hole H formed in the base 100, that is, the fastening hole H formed in the connector arrangement part 120 may be formed by a burring process, and the base 100 by a burring process. The outer wall defining the fastening hole (H) formed in the) may protrude toward the main circuit board 400.

In addition, the fastening hole (H) formed in the base 100 may be provided with a screw tab for fastening the bolt (B) through a separate process at the same time or after the burring process.

Meanwhile, a sealing part S through which the bolt B passes may be disposed between the flexible printed circuit part 250 and the connector arranging part 120 of the base 100, and may be flexible due to the sealing part S. The fastening hole H communicating with the printed circuit unit 250, the connector arrangement unit 120 of the base 100, and the main circuit board 400 may be sealed.

Here, in FIGS. 1 to 3, the sealing part S is illustrated to correspond to each of the fastening holes H, but the present invention is not limited thereto, and a plurality of fastening holes H may be sealed by one sealing part S. Make sure you can.

Therefore, the bolt B inserted into the fastening hole H communicating with the flexible printed circuit unit 250, the connector arrangement unit 120 of the base 100, and the main circuit board 400 and the bolt B are fastened. Due to the nut (N), the base assembly 10 for a motor according to an embodiment of the present invention not only simplifies the manufacturing process, but also improves airtightness due to the sealing part (S).

In other words, in the case of the conventional base, aluminum (Al) is manufactured by die-casting, so that holes for fastening to the upper and lower surfaces of the base are respectively secured in fixing the flexible printed circuit unit and the main circuit board to the base. There is no difficulty to form.

That is, in the case of the conventional base, it was possible to form a plurality of holes for fastening on the upper and lower surfaces of the base, respectively, in the neighboring position, but in the case of the base 100 manufactured by the place processing as in the present invention There is a problem that it is difficult to manufacture to form a fastening hole in a position adjacent to the upper and lower surfaces of the (100).

Therefore, the base 100 provided in the base assembly 10 according to the embodiment of the present invention couples the flexible printed circuit unit 250 and the main circuit board 400 to the connector arrangement unit 120 of the base 100. To form a fastening hole (H) for communicating the flexible printed circuit unit 250, the connector arrangement portion 120 and the main circuit board 400 of the base 100, and the bolt (B) and the nut ( It is to combine with each other using N).

Therefore, the present invention can fasten the base 100 and the flexible printed circuit unit 250 and the main circuit board 400 manufactured by press working with each other by a simple process, furthermore, due to the sealing portion (S) The airtightness of the hole H can also be improved.

The spindle motor 300 is for rotating the disk D, and is fixedly installed at the center of the disk arranging unit 110 of the base 100.

The disk D may be coupled to the spindle motor 300 and may have a recording surface on which data is recorded by rotating with the rotation of the spindle motor 300.

Here, a clamp 310 for firmly fixing the disk D to the spindle motor 300 may be fastened by the screw 320 to the upper end of the spindle motor 300.

In addition, although FIG. 1 illustrates a configuration in which one disk D is mounted on the spindle motor 300, this is merely an example, and one or more disks D may be mounted on the spindle motor 300. Can be. When a plurality of disks (D) is mounted in this way, a ring-shaped spacer for maintaining the distance between the disks (D) may be disposed between the disks (D).

4 to 6 are schematic perspective views and cross-sectional views (only part X of FIG. 1) illustrating a manufacturing process of a base assembly for a motor according to an embodiment of the present invention.

Referring to FIG. 4, FIG. 4 is a view illustrating a process for forming a fastening hole H in the connector disposition part 120 of the base 100, and the fastening hole H is formed by the through part 125. It may be formed by a burring process in a predetermined region of the connector arrangement portion 120 of the formed base 100.

Here, the fastening hole (H) may be provided with a screw tab for fastening the bolt (B) at the same time as the burring process or through a separate process after the burring process.

Through the above process, the fastening hole H formed in the base 100 may protrude toward the direction in which the main circuit board 400 is disposed.

5A and 5B, when the fastening hole H is formed in the connector arrangement unit 120 of the base 100 on which the through part 125 is formed by the burring process, the upper part of the base 100 is sealed. After arranging the unit S, the flexible printed circuit unit 250 is disposed on the sealing unit S.

Thereafter, the components B are fastened to each other by inserting a bolt B into the fastening hole H communicating with the flexible printed circuit unit 250, the sealing unit S, and the connector arrangement unit 120.

The bolt B after fastening the components to each other protrudes to the lower side of the base 100, and the protruding portion may be used for coupling the main circuit board 400.

6 is a schematic exploded perspective view before the main circuit board 400 is coupled to the base 100, and the left view is a schematic enlarged cross-sectional view after the main circuit board 400 is coupled to the base 100. .

Referring to FIG. 6, when the flexible printed circuit unit 250, the sealing unit S, and the connector arranging unit 120 of the base 100 are fastened to each other by bolts B, the lower portion of the base 100 may be provided. The main circuit board 400 is disposed.

That is, all the fastening processes are performed by inserting the bolt B protruding downward from the base 100 into the fastening hole H of the main circuit board 400 and then fastening the nut N to the bolt B. Can be finished.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that such modifications or variations are within the scope of the appended claims.

In addition, the aforementioned fastening hole (H) is a hole formed in communication with the flexible printed circuit unit 250, the sealing unit (S), the connector arrangement unit 120 and the main circuit board 400, the same size Although described, the present invention is not necessarily limited thereto, and the size of the components may be slightly different due to manufacturing tolerances.

10: base assembly for motor 100: base
110: disk arrangement portion 120: connector arrangement portion
200: head stack assembly (HSA) 250: flexible printed circuit (FPCA)
300: spindle motor 600: hard disk drive
H: Fastening hole S: Sealing part
B: Bolt N: Nut

Claims (6)

A base formed by press working; And
A flexible printed circuit unit having a connector for connecting a head stack assembly (HSA) coupled to the base to a main circuit board disposed on a bottom of the base;
The base, the flexible printed circuit unit and the main circuit board have at least one fastening hole in communication with each other, and after inserting a bolt into the fastening hole, fastening a nut to the bolt so that the base, the flexible printed circuit part, and the A base assembly for a motor in which main circuit boards are coupled to each other.
The method of claim 1,
The fastening hole formed in the base is a motor base assembly formed by a burring process.
The method of claim 1,
An outer wall defining a fastening hole formed in the base protrudes toward the main circuit board.
The method of claim 1,
And a sealing part sealing the fastening hole between the base and the flexible printed circuit part.
The method of claim 1,
The fastening hole is formed in plural, the base assembly for the motor is formed so that the distance between the fastening hole is the longest within the range of the flexible printed circuit.
A base assembly for a motor according to any one of claims 1 to 5;
A magnet disposed on the motor base to provide driving force to the head stack assembly (HSA); And
And a spindle motor coupled to the motor base to rotate the disk.
KR1020110109703A 2011-10-26 2011-10-26 Base assembly for motor and hard disk drive including the same KR20130045477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110109703A KR20130045477A (en) 2011-10-26 2011-10-26 Base assembly for motor and hard disk drive including the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110109703A KR20130045477A (en) 2011-10-26 2011-10-26 Base assembly for motor and hard disk drive including the same

Publications (1)

Publication Number Publication Date
KR20130045477A true KR20130045477A (en) 2013-05-06

Family

ID=48657490

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110109703A KR20130045477A (en) 2011-10-26 2011-10-26 Base assembly for motor and hard disk drive including the same

Country Status (1)

Country Link
KR (1) KR20130045477A (en)

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