KR200160888Y1 - Hard stack assembly rotating apparatus for hard disk drive - Google Patents

Abstract

The present invention relates to an apparatus for rotating a head stack assembly installed horizontally on a base of a hard disk drive. The head stack assembly rotating apparatus for a hard disk drive according to the present invention is a task for horizontally rotating a head stack assembly mounted on a base of a hard disk drive so that the magnetic head faces an information recording surface of a corresponding hard disk. It can be done easily, quickly and accurately, and it can be prevented that the gap between the magnetic head and the hard disk becomes narrow while the head stack assembly is being rotated, so that the contact between the magnetic head and the hard disk is prevented and the magnetic Damage to the head or damage to the hard disk can be reliably prevented.

Description

Head Stack Assembly Rotator for Hard Disk Drive

The present invention relates to a head stack assembly rotating apparatus for a hard disk drive for rotating the head stack assembly rotatably installed at the base of the hard disk drive to a position where the magnetic heads face the corresponding hard disk.

Generally, as shown in FIG. 1, a hard disk drive reads a plurality of hard disks 2 stacked and stacked on a base 1 and information on both information recording surfaces of each hard disk 2. Or a head stack assembly 3 for recording on each information recording surface, and a head drive member 6 for reciprocating rotation of the head stack assembly 3. One end of the head stack assembly 3 is coupled to stack a plurality of arms 4 as shown in FIG. 2, and a magnetic head 5 is attached to each arm 4. The other end of the head stack assembly 3 is provided with a coil 3a. The head drive member 6 is provided with a pair of upper and lower magnets 6a as shown in FIG. 3, and the head drive member 6 has the head stack assembly 3 between the magnets 6a. The coil 3a is coupled to the base 1 to be fitted, and then fixed by a screw that is fastened to the base 1 through the through holes 6c and 6d. After being assembled in this state, the headstack assembly 3 is subjected to electromagnetic interaction between the coil 3a and the magnet 6a, and thus, one side of the head driving member 6 as shown in solid line in FIG. 1. 1, the magnetic body 3b coupled to the head stack assembly 6 is reciprocated between the position where it is attached to the auxiliary magnet 6b of the head drive member 6, as shown by the virtual line in FIG. Can be.

Meanwhile, as is well known to those skilled in the art in assembling the head stack assembly 3 and the head driving member 6 to the base 1, first, the head stack assembly 3 is installed on the base 1, and then FIG. 4. As shown in FIG. 1, the through holes 6c of the head driving member 6 are fitted to the hinge shaft 1a of the base 1, and the magnetic heads 5 are separated from the edge of the hard disk 2. If present, one side of the head drive member 6 cannot be engaged by being caught by one end of the other end of the pre-inserted head stack assembly 3. Thus, the headstack assembly 3 is shown, for example, in a position and an imaginary line shown in solid lines in FIG. 1 such that the respective magnetic heads 5 face the information recording surface (upper and lower surface) of the hard disk 2 corresponding thereto. The first horizontal rotation to a proper first position between the closed positions so that the head drive member 6 inserted into the hinge shaft 1a of the base 1 is not caught by the head stack assembly 3, and then the head drive The member 6 is inserted into the hinge axis 1a of the base 1 as shown by the virtual line in FIG. Thereafter, the head drive member 6 is rotated in the direction of the arrow A so that the coil 3a portion of the head stack assembly 3 is sandwiched between the magnets 6a as described above. Then, as shown by the phantom line in FIG. 1, the head stack assembly 3 in the first position is secondarily rotated to the second position on the center side of the hard disk 2 so that the magnetic body of the head stack assembly 3 ( 3b) is attached to the auxiliary magnet 6b of the head drive member 6 so that the head stack assembly 3 is temporarily fixed in position. Thereafter, the head driving member 6 is screwed into the through holes 6c and 6d to the base 1. On the other hand, the magnetic force of the auxiliary magnet (6b) is significantly weak compared to the electromagnetic force generated between the coil (3a) and the magnet (6a), so when the current is applied to the coil (3a) the head stack assembly (3) Overcoming the temporary fixed state can be rotated to a position as shown by the solid line in FIG.

By the way, conventionally, the operation | movement which rotates the head stack assembly as mentioned above was performed by the manual operation of an operator. As a result, it is difficult to expect improvement in workability, and when the fatigue of the operator is accumulated, the magnetic heads come into contact with the information recording surfaces of the hard disks in the process of rotating the head stack assembly. There is a problem that a damage occurs.

The present invention has been devised to solve this problem, and the work can be done quickly and accurately by rotating the headstack assembly installed on the base of the hard disk drive to a position where the magnetic heads face the corresponding hard disk. In addition, an object of the present invention is to provide a head stack assembly rotating apparatus for a hard disk drive that can effectively prevent damage to the information recording surface or head of hard disks.

1 is a schematic plan view of main parts of a hard disk drive;

FIG. 2 is a schematic sectional view taken along line II-II of the headstack assembly shown in FIG. 1;

3 is a schematic cross-sectional view taken along line III-III of the head driving member shown in FIG. 1;

4 is a view for explaining a state in which the head drive member shown in Figure 1 is inserted into the base of the hard disk drive,

5 is a schematic plan view of a system employing a head stack assembly rotating apparatus for a hard disk drive according to the present invention;

6 is an enlarged view of the head stack assembly pivoting apparatus shown in FIG. 5;

7 is a front view of the device shown in FIG. 6, FIG.

8 is a right side view of the apparatus shown in FIG.

9 and 10 is a view showing a state in which the pressing member shown in Figure 6 presses the head stack assembly,

FIG. 11 is a view illustrating a state in which the head stack assembly is rotated to the first position by the head stack assembly pivoting device illustrated in FIG. 6.

<Explanation of symbols for main parts of drawing>

10 ... table 200 ... head stack assembly pivot

210 ... motor 211 ... rotation shaft

212 Drive Pulley 215 Driven Pulley

219 ... belt 220 ... frame

230 Pressing member 231 Projection

232 Disk insertion groove 250 Lift member

251 ... distance measuring sensor

1.base of hard disk drive

2 ... hard disk 3 ... headstack assembly

4 ... arm 5 ... magnetic head

In order to achieve the above object, the head stack assembly rotating apparatus for a hard disk drive according to the present invention is mounted on the base of a hard disk drive in which hard disks are stacked so as to be horizontally rotatable, and at one end thereof, a plurality of arms provided with magnetic heads. A stack-coupled headstack assembly for horizontally rotating each magnetic head to face a corresponding hard disk, the table supporting the base of the hard disk drive, and accessing and separating the arms of the headstack assembly. A frame installed to be horizontally movable on the table, a frame moving means for horizontally moving the frame, and coupled to the frame so that the head stack assembly is rotated when the frame moves closer to the head stack assembly side. Pressing to press the arms And a pressing member comprising: a plurality of protrusions sandwiched between the arms to prevent each of the magnetic heads from touching the information recording surface of the corresponding hard disk when the head stack assembly is rotated; It is characterized in that it is formed from the tip of each of the protrusions provided with a disk insertion groove into which the hard disk can be fitted.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 5 is a schematic plan view of a main portion of a hard disk drive assembly system employing a head stack assembly rotating apparatus for a hard disk drive according to the present invention. Referring to FIG. 5 together with FIGS. 1 to 4, a base 10 of a hard disk drive in which a table 10, the head stack assembly 3 is installed, and the head driving member to be installed in the base 1 ( 6) is provided with a tray 100, the head stack assembly rotating apparatus 200 and the head drive member assembly 300 according to the present invention.

The tray 100 is slidably coupled to the guide rail 14 installed on the table 10, and is shown in FIG. 1 along the guide rail 14 by the pneumatic cylinder 110 installed on the table 10. It may be transferred from the position shown by the predetermined position as shown by the virtual line. When the tray 100 is transferred to the predetermined position in this manner, the head stack assembly 3 installed on the base 1 of the hard disk drive placed on the tray 100 is moved by the head stack assembly pivoting device 200. The magnetic head 5 is rotated horizontally to face the hard disk 2 corresponding thereto.

The head driving member assembly 300 is configured to suck the head driving member 6 on the tray 100 and mount it on the base 1 of the hard disk drive after the head stack assembly 3 is horizontally rotated. It is irrelevant to the configuration of the head stack assembly rotation apparatus 200 of the present invention as a part, and thus the detailed configuration and operation of the head driving member assembly 300 will be omitted, and the head of the present embodiment will be omitted. The stack pivoting apparatus will be described in detail.

As shown in FIGS. 6 to 8, the head stack assembly rotating apparatus 200 of the present embodiment includes a frame 220 installed on the table 10 and a pressing member 230 coupled to the frame 220. Equipped with.

The frame 220 is fixed to the guide block 12, and the guide block 12 is slidable to the guide rail 11 disposed long toward the tray 100 transferred to the predetermined position on the table 10. Are combined. As a means for horizontally moving the frame 220 coupled as described above, a motor 210 installed in the table 10, a drive pulley 212 fixed to the output shaft 211 of the motor 210, and a table ( 10 and a belt 219 wound around the pulleys 212 and 215. One side of the belt 219 is fixed to the frame 220. Accordingly, the frame 220 receives the power of the motor 210 through the pulleys 212 and 215 and the belt 219 to approach and to the hard disks 2 on the tray 100 transferred to the predetermined position. It can be moved horizontally in the direction.

The frame 220 is provided with a long guide rail 221 in the vertical direction, the lifting member 250 is fixed to the guide block 253 slidably coupled along the guide rail 211. The pressing member 230 is fixed to the lifting member 250. An elevating member driving motor 240 is fixed to the frame 220 as an actuator for elevating the pressing member 230, and the elevating member 250 is connected to the rotating shaft 241 of the elevating member driving motor 240. The screwed ball screw 242 is fixed. Accordingly, when the elevating member driving motor 240 is operated, the ball screw 242 rotates, and the pressure member fixed to the elevating member 250 and the elevating member 250 screwed with the ball screw 242. 230 may be elevated along the guide rail 253. The elevating member 250 is provided with a distance measuring sensor 251 as a means for detecting the vertical distance of the pressing member 230 with respect to the hard disk of the uppermost of the hard disk (2). When the vertical distance between the uppermost hard disk 2 and the pressing member 230 is out of a predetermined value, a signal is generated by the distance measuring sensor 251 and the lifting member driving motor 240 is based on the signal. ) Is operated, and the lifting member 250 and the pressing member 230 are raised or lowered to maintain the vertical distance constant. On the other hand, the upper and lower light sensor 228 and the lower light sensor 229 is installed on the bracket 222 fixed to the frame 220 so that the excessive lifting of the lifting member 250 can be detected in advance, the lifting member 250 is provided with a sensor dog 250 sandwiched between the upper photo sensor 228 and the lower photo sensor 229.

The pressing member 230 is for pressing the arms 4 such that the head stack assembly 3 is rotated when the frame 220 approaches the hard disk 2, and the head stack assembly 3. And a plurality of protrusions 231 sandwiched between the arms 4 to prevent each of the magnetic heads 5 from contacting the information recording surface of the hard disk 2 corresponding thereto when the wheels are rotated. And a disk insertion groove 232 formed from the tip of 231 and into which the hard disk 2 can be inserted.

A rail support 290 is provided at a position adjacent to the guide rail 11, and a plurality of optical sensors 291, 292 and 293 are fitted into and fixed to the rail support 290. The optical sensor 293 has an optical transmitter 293a and an optical receiver 293b, and the optical sensors 291 and 292 also have an optical transmitter and a optical receiver. The optical sensors 291, 292 and 293 detect the sensor dog 227 installed in the frame 220 by the optical signal between the optical transmitter and the optical receiver, and transmit the detected signal to the motor 210. ) Is sent to the control unit that controls the operation. The optical sensor 291 and the optical sensor 292 are each the head stack assembly (3) which is pressed by the pressing member 230 and rotated during the movement of the frame 220, for example, shown in solid lines in FIG. At the time of being located at an appropriate first position between the indicated position and the position shown by the virtual line and at the second position on the center side of the hard disk 2 as shown by the virtual line in FIG. It is fixed in position to generate a signal.

The process of the head stack assembly 3 being rotated by the head stack rotating apparatus 200 configured as described above will be described.

First, on the tray 100 in a state where the tray 100 is located at the position shown by the solid line in FIG. 5, the hard disks 2 are coupled in multiple layers and the head stack assembly 3 is installed to be rotatable. The base 1 and the head drive member 6 of the disk drive are respectively seated. In this state, the pneumatic cylinder 110 is operated to transfer the tray 100 to a predetermined position shown by a virtual line in FIG. 5. When the tray 100 is transferred to the predetermined position in this manner, the motor 210 is operated so that the belt 219 driven by the motor 210 moves the frame 220 from the positions shown in FIGS. 5 to 7. The guide rail 11 is transferred to the tray 100 side. As described above, the projection 231 of the pressing member 230 provided on the elevating member 250 while the frame 220 is transferred to the tray 100 is provided on the base 1 of the hard disk drive on the tray 100. It fits between the arms 4 of the stack assembly 3 to prevent the corresponding arms 4 from approaching each other. On the other hand, before the pressing member 230 contacts the arm 4 of the hard stack assembly 3, the distance measuring sensor 251 faces the hard disk 2 of the uppermost layer in advance and When the vertical distance of the pressing member 230 is sensed, and the vertical distance is out of a predetermined range, the signal is sent to a control unit for controlling the operation of the elevating member driving motor 240, thereby elevating the elevating member driving motor 240. ) And the pressing member 230 is raised or lowered by the operation of the lifting member driving motor 240 so that the vertical distance of the pressing member 230 with respect to the hard disk can be properly adjusted. By doing so, for example, it is possible to effectively cope with the case where the height of mounting of the base 1 to the tray 100 is changed or there is a model change of the hard disk drive.

As the frame 220 continues to move, the pressing member 230 presses the arms 4 of the head stack assembly 3 so that the head stack assembly 3 is rotated toward the hard disk 2. Then, the magnetic head 5 coupled to each arm 4 starts to face the information recording surface (upper and lower surface) of the hard disk 2 corresponding thereto as shown in FIG. At this time, the magnetic heads 5 facing the upper and lower surfaces of the hard disk 2 are prevented from accessing the arms 4 supporting the magnetic heads 5 by the protrusion 231 of the pressing member 230. Therefore, the hard disk 2 is not in contact with the hard disk 2, and damage to the magnetic head 5 or the hard disk 2 due to the contact is prevented. In this state, if the frame 220 continues to move, the head stack assembly 3 is continuously rotated by the pressing member 230, and the random position between the position shown by the solid line in FIG. 1 and the second position shown by the imaginary line is shown. 11, the magnetic heads 5 face the information recording surface of the hard disk 2 corresponding thereto as shown in FIG. 11, and the hard disk is the disk insertion groove 232 of the pressing member 230. As shown in FIG. It is inserted into the predetermined depth.

As the head stack assembly 3 is rotated as described above, the gap between the magnetic head 5 and the hard disk 2 can be prevented by the protrusion 231 of the pressing member 230. The contact between the magnetic head 5 and the hard disk 2 can be prevented, and the damage of the magnetic head 5 or the hard disk 2 due to the contact can be reliably prevented.

When the head stack assembly 3 is rotated to the first position as described above, the sensor dog 227 of the frame 220 which is horizontally moved is positioned between the light transmitter and the light receiver of the optical sensor 291. Accordingly, the optical sensor 291 detects the sensor dog 227 to generate a signal, and the control unit for controlling the operation of the elevating member driving motor 240 is the lifting member driving motor 240 by the signal. ) Will stop working. Accordingly, the horizontal movement of the frame 220 and the advancement of the pressing member 230 are stopped, and the rotation of the head stack assembly 3 by the pressing member 230 is also temporarily stopped at the first position.

In the present assembly system, when the rotation stops in the state where the head stack assembly 3 is positioned in the first position as described above, the head drive member 6 on the tray 100 is moved to the head drive member assembly 300. It is fitted to the end installed in the base 1 by the coil (3a) of the head stack assembly (3) rotated to the first position.

In addition, in the head stack assembly rotating apparatus 200 of the present embodiment, the head driving member 6 is mounted to the base 1 by the head driving member assembly 300 and rotated to the first position. After the coil 3a of (3) is fitted to the end provided, the motor 210 is operated again to advance the frame 220. Accordingly, the pressing member 230 is formed by the above-described method of the head stack assembly 3 stationary in the first position, and the magnetic heads 5 are positioned adjacent to the center side of the hard disk 2 by the method described above. Rotate to 2 position. When the head stack assembly 3 is rotated to the second position as described above, the magnetic body 3b of the head stack assembly 3 is attached to the auxiliary magnet 6b of the head driving member 6 as described with reference to FIG. 1. . Accordingly, relative movement of the head stack assembly 3 and the head drive member 6 is prevented.

Thereafter, the motor 210 rotates backward to retract the frame 220, and thus the pressing member 230 is retracted from the head stack assembly 3 and moved back to the head stack assembly 3. Return to the position shown in FIG.

As can be seen from the above description, when the head stack assembly rotating apparatus for a hard disk drive according to the present invention is used, the head stack assembly 3 mounted on the base 1 of the hard disk drive so as to be horizontally rotatable is provided with a magnetic head. The operation of horizontally rotating so that (5) faces the information recording surface of the hard disk 2 corresponding thereto can be performed easily, quickly and accurately. Further, since the distance between the magnetic head 5 and the hard disk 2 can be prevented from narrowing while the head stack assembly 3 is rotated, the contact between the magnetic head 5 and the hard disk 2 is prevented. This prevents damage to the magnetic head 5 and damage to the hard disk 2 due to the contact thereof.

The head stack assembly rotating apparatus for a hard disk drive of the present invention is not limited to the configuration of the above-described embodiment, and an apparatus having various forms of configurations can be easily configured by those skilled in the art without departing from the claims of the present invention. Could be.

For example, even if the distance measuring sensor 251 is not provided, the object of the present invention can be sufficiently achieved. In addition, when the head stack assembly 3 is in the first position and the second position, the position of the frame 220 is calculated in advance and inputted to a control unit that controls the operation of the motor 210. Even without installing 291,292,293, accurate position control of the frame 220 can be performed.

As described above, the head stack assembly rotating apparatus for a hard disk drive according to the present invention includes a head stack assembly mounted on the base of the hard disk drive so that the magnetic head faces the information recording surface of the corresponding hard disk. The horizontal turning operation can be easily, quickly and accurately performed, and the gap between the magnetic head and the hard disk can be prevented from being narrowed while the head stack assembly is being rotated, so that the contact between the magnetic head and the hard disk is prevented and the Damage to the magnetic head or damage to the hard disk due to contact can be reliably prevented.

Claims (4)

A horizontally mounted headstack assembly is mounted on a base of a hard disk drive in which hard disks are stacked, and at one end thereof, a stacking head stack assembly having a plurality of arms having magnetic heads mounted thereon, so that the magnetic heads face the corresponding hard disks. To make it A table for supporting the base of the hard disk drive; A frame mounted horizontally on the table so as to be approached and spaced apart from the arms of the headstack assembly; Frame moving means for horizontally moving the frame; A pressing member coupled to the frame and pressing the arms such that the head stack assembly is rotated when the frame moves closer to the head stack assembly; The pressing member includes a plurality of protrusions sandwiched between the arms to prevent each of the magnetic heads from touching the information recording surface of the hard disk corresponding thereto when the head stack assembly is rotated, and the protrusions A head stack assembly rotating apparatus for a hard disk drive, comprising: a disk insertion groove formed from a front end to which a hard disk can be inserted. According to claim 1, wherein the frame moving means A motor mounted to the table, a drive pulley coupled to the output shaft of the motor, a driven pulley rotatably mounted on the table, and a belt fastened to the frame by one side of the drive pulley and the driven pulley. Head stack assembly rotation apparatus for a hard disk drive, characterized in that provided. The method of claim 1, And a vertical distance detecting means for detecting a vertical distance of the pressing member with respect to the hard disk on the uppermost side of the hard disks. The method of claim 1, The pressing member is coupled to the frame by a predetermined distance lifting, And an actuator for lifting and lowering the pressing member in the frame.