KR20080074362A - Ramp and hard disk drive with the same - Google Patents

Abstract

A ramp and a hard disk drive having the same are provided to restrict vertical escape of an end tap which is mounted on end tap stopping surface by using restriction walls so as to prevent a collision between a disk and a head slider and to achieve reliable HSA(Head Stack Assembly) locking. A ramp(140) has fingers(141) with inclined surfaces(142) inclined in the direction of separating an end tap of a front end of an HSA from the surface of a disk. The ramp includes end tap moving surfaces(143) horizontally extended to move the end tap horizontally, end tap stopping surfaces(144), restriction walls(147a,147b) restricting vertical escape of the end tap, and a flexure support surface(146) preventing a collision between a pair of head sliders. The ramp has a ramp hook(150) and a path switching unit(155).

Description

Ramp and hard disk drive with the same}

1 is a perspective view showing an example of a conventional lamp (ramp).

2 is a plan view illustrating a hard disk drive according to a preferred embodiment of the present invention.

3 is a perspective view illustrating the lamp of FIG. 2.

FIG. 4 is a side view of the lamp for explaining the movement path of the end-tap supported by the lamp.

<Description of the symbols for the main parts of the drawings>

100 ... Hard disk drive 101 ... Base member

105 ... spindle motor 107 ... disc

110 ... HSA 117 ... Suspension

122 ... voice coil 124 ... HSA hook

127 ... Head Slider 130 ... VCM Block

135 ... latch 140 ... ramp

141 ... Fingers 142 ...

143 ... End-Tab Moving Surface 144 ... End-Tap Stop Surface

147a, 147b ... restricted wall 150 ... lamp hook

151 ... inner side of the lamp hook 155 ... protrusion

The present invention relates to a hard disk drive, and more particularly, to a lamp in which the head slider parks when the hard disk drive is not operating, and a hard disk drive having the same.

A hard disk drive (HDD) is an example of an auxiliary memory device used for a computer, an MP3 player, a mobile phone, and the like. The hard disk drive (HDD) is a device for reproducing data recorded on a disk by a magnetic head or recording new data on a disk. to be. In such a hard disk drive, the magnetic head moves to a desired position with a predetermined height floating from a recording surface of a rotating disk to perform a function of recording or reproducing data.

On the other hand, when the hard disk drive is not operated, that is, when the rotation of the disk is stopped, the magnetic head is parked at a position outside the recording area of the disk so as not to hit the recording area of the disk. The magnetic head parking system for this can be largely classified into a Contact Start Stop (CSS) method and a ramp method.

In the CSS method, a parking zone is provided at an inner circumference of the disk, and the head slider is parked by contacting the parking area. The lamp method is provided with a lamp on the outer side of the disk. This is how you park your head slider. The CSS method is not suitable for modern mobile environments because the head stack assembly (HSA) and the head slider are not fixed during parking, so the head slider and the disk may be damaged by an external impact. Therefore, the lamp system is widely adopted in recent years.

1 is a perspective view showing an example of a conventional lamp (ramp).

Referring to FIG. 1, the HSA 20 typically has a suspension 25 that supports the head slider 22. The suspension 25 includes a load beam 26 for elastically biasing the head slider 22 to the surface side of the disk 1 and a flexure 27 for attaching and supporting the head slider 22. And an end tap 24 formed at the tip of the load beam 26. The conventional lamp 10 has an inclined surface 11 that is inclined in a direction to separate the end tab 24 from the surface of the disk 1 as the end tab 24 moves to the outer side of the disk 1. And end tab moving surfaces 12 horizontally extended so that the end tabs 24 move in the horizontal direction, end tab stop surfaces 13 on which the end tabs 24 are stopped, and end tab stop surfaces 13. The restriction wall 15 which suppresses detachment of the fixed end tab 24 is provided.

On the other hand, a conventional lamp parking type hard disk drive is provided with a latch (not shown) to prevent the HSA 20 parked in the lamp 10 from being moved by an impact from the outside. The latch is provided at the rear end of the HSA 20. However, the conventional latch has a problem that the locking of the HSA 20 is often released due to lack of reliability of a locking function that prevents the movement of the HSA 20. When the locking of the HSA 20 is released, the disk 1 and the head slider 22 may collide, resulting in permanent damage. Therefore, a more reliable HSA locking means is required.

The present invention is to solve the above problems, and prevents the departure of the end tab due to an external impact while preventing the movement of the end tab in the loading / unloading process (ramp) and having it It is a technical problem to provide a hard disk drive.

In order to achieve the above technical problem, the present invention is located on the outer periphery of the disk, which is a data storage medium of the hard disk drive, to support end-taps of the head stack assembly (HSA) tip during parking of the head slider. An inclined surface inclined in a direction in which the end tab is spaced apart from the surface of the disk as the end tab moves to an outer side of the disk, an end tab moving surface extending horizontally so that the end tab moves in a horizontal direction, An end tab stop surface on which the tab is stopped, a limiting wall for suppressing the release of the end tab settled on the end tab stop surface, a hook intercepting the end tab separated from the end tab stop surface due to disturbance; And a path converting means for guiding the path of the end tap to the hook side when the end tap moves at a speed faster than the normal speed due to disturbance. It provides a lamp and a hard disk drive having the same.

Preferably, the path converting means may be a protrusion formed on the end tab moving surface.

Preferably, the hook may be spaced apart from the end tab moving surface by at least the thickness of the end tab.

Preferably, the hook may have an inner side surface inclined such that the end tab moves away from the end tab moving surface as the end tab gets closer to the center of the disk.

Preferably, the hard disk drive may further include a latch that blocks a rear end of the HSA parked in a lamp to prevent rotation due to disturbance of the HSA.

Hereinafter, a lamp according to a preferred embodiment of the present invention and a hard disk drive having the same will be described in detail with reference to the accompanying drawings.

2 is a plan view illustrating a hard disk drive according to a preferred embodiment of the present invention.

Referring to FIG. 2, the hard disk drive 100 includes a spindle motor 105, a data storage medium disk 107, and an HSA in a housing including a base member 101 and a cover member (not shown) coupled thereto. Head Stack Assembly (110) and the Voice Coil Motor (VCM) block 130 is provided. The spindle motor 105 is for rotating the disk 107 at high speed, and is fixed to the base member 101. The disk 107 is coupled to the spindle motor 105 to rotate at a high speed in the direction of the arrow, the high-speed rotation is induced on the surface of the disk 107 flows in the same direction as the arrow.

The HSA 110 includes a head slider 127 in which a magnetic head (not shown) for recording or reproducing data is formed. The head slider 127 moves to a specific position on the disc 107, specifically a specific track, to record data on the disc 107 or to reproduce data recorded on the disc 107. The HSA 110 includes a swing arm 115 that pivots on a base member 101 with a pivot bearing 111 as a pivot center, and an extended suspension coupled to a distal end of the swing arm 115. , 117, and a head slider 127 mounted at the front end of the suspension 117. The suspension 117 is coupled to the distal end of the swing arm 115 and is attached to the load beam (load beam 26, see FIG. 1) for elastically biasing the head slider 127 toward the disk 107. And a flexure 27 to attach and support the head slider 127, and an end tap 119 formed at the end of the load beam. The HSA 110 also includes an overmold 121 extending from the pivot bearing 111 in a direction opposite to the extending direction of the swing arm 115 and having a voice coil 122 wound thereon. do.

Lifting force acts on the head slider 127 as the air flow induced by the high speed rotation of the disk 107 passes between the surface of the disk 107 and the disk opposing surface of the head slider 127. The head slider 127 maintains a floating state at a height in which the lifting force and the elastic pressing force of the suspension 117 for pressing the head slider 127 toward the disk 107 are balanced. The magnetic head formed on the head slider 127 in this floating state records data on the disk 107 or reproduces data recorded on the disk 107.

When the operation of the hard disk drive 100 is stopped, the head slider 127 leaves the disk 107, and the HSA 110 is provided at an outer side of the disk 107 and parked on a ramp 140. )do. The end tab 119 formed at the distal end of the suspension 117 slides in contact with the lamp 140 so that the HSA 110 is parked.

The hard disk drive 100 has a latch 135. The latch 135 is for locking the HSA 110 by interfering with the HSA hook 124 formed in the overmold 121 when the HSA 110 is parked on the lamp 140. That is, the latch 135 is a means for blocking the HSA hook 124 to prevent any rotation of the HSA 110 due to disturbance.

The VCM block 130 is fixedly mounted to the base member 101. The VCM block 130 includes a magnet 131 disposed above and below the overmold 121, and a yoke 132 supporting the magnet 131. The voice coil 122, the magnet 131, and the yoke 132 form a voice coil motor providing a rotational force to the HSA 110. Rotation of the HSA 110 is controlled by a servo control system.

The HSA 110 is electrically connected to a main circuit board (not shown) disposed under the base member 101 via the flexible printed circuit 110. The main circuit board includes a controller for controlling the driving of the HSA 110 and the spindle motor 105.

3 is a perspective view illustrating the lamp 140 of FIG. 2, and FIG. 4 is a side view of the lamp for explaining a movement path of the end tab 119 supported by the lamp 140.

3 and 4, the lamp 140 according to a preferred embodiment of the present invention includes a finger 141 protruding partially overlapping with an outer periphery of the disk 107 (see FIG. 2). The end tab 119 of the tip of the HSA 110 moves to the outer side of the disk 107 due to the clockwise rotation of the HSA 110 (see FIG. 2). An inclined surface 142 inclined in a direction to be spaced apart from the surface of 107 is formed. In addition, the lamp 140 includes the end tab moving surface 143 which is horizontally extended so that the end tab 119 mounted on the inclined surface 142 by the clockwise rotation of the HSA 110 can move in the horizontal direction, and the HSA. As the clockwise rotation of 110 stops, the end tab stop surface 144 on which the end tab 119 is stopped and the end tab 119 fixed to the end tab stop surface 144 are restrained in the vertical direction. A flexure support surface for preventing collision between the restriction walls 147a and 147b and the pair of head sliders 127 (see FIG. 2) facing each other by supporting the tip of the flexure 27 (see FIG. 1). 146).

The lamp 140 has a lamp hook 150 that intercepts the end tab 119 that is separated from the end tab stop surface 144 in a horizontal direction by an external impact, and the end tab 119 is normal by an external impact. When moving at a speed faster than the moving speed is provided with a path converting means for guiding the path of the end tab 119 to the lamp hook 150 side. The lamp hook 150 is unloaded from the disk 107 for parking the ramp 140 when the HSA 110 (see FIG. 2) is loaded from the parking state onto the disk 107 or vice versa. It should not interfere with the end tap 119 moving at normal speed when unloading. Accordingly, the lamp hook 150 and the end tab moving surface 143 are spaced apart from each other, and the gap G is at least equal to the thickness Te of the end tab 119.

The lamp hook 150 is one side of the disk side of the limiting wall 147a (restriction wall 147a in FIG. 4) to prevent random loading of the HSA 110 (see FIG. 2) due to disturbance. Is formed on the left). On the other hand, by one end 136 of the latch 135 intercepting the HSA hook 124 (see FIG. 2), any movement of the end tab 119 in the opposite direction of the disk due to disturbance can be reliably prevented. The ramp hook 150 has the end tab 119 closer to the center of the disk 107 (see FIG. 2), that is, the end tab 119 moves toward the disc side. The inner side surface 151 is inclined away from the end tab moving surface 143.

The path converting means may be a protrusion 155 formed on the end tab dlehdas 143. The protrusion 155 is formed at a position overlapping with the tip 152 of the lamp hook 150, or is formed at a position slightly biased in a direction opposite to the disk than the lamp hook tip 152.

Hereinafter, the function of the lamp hook 150 will be described with reference to FIGS. 2 and 4.

In the parking state of the HSA 110, the end tab 119 is fixed to the end tab stop surface 144. When the disk 107 starts to rotate due to the operation of the hard disk drive 100, the HSA 110 starts to rotate counterclockwise to load the head slider 127 onto the disk 107. The tab 119 moves toward the protrusion 155. At this time, since the moving speed of the end tap 155 is a relatively slow normal moving speed, the end tap 119 gently rides over the protrusion 155 and moves in the direction of the arrow (i) so that the head slider 127 moves to the disk 107. Is loaded.

On the other hand, the HSA 10 may be rapidly rotated counterclockwise by an external shock applied in the parking state of the HSA 110. At this time, the end tab 119 is moved toward the protrusion 155 at a considerably faster speed than the normal moving speed, so that the end tab 119 is caught by the protrusion 155 in the direction of the arrow (ii) from the end tab moving surface 143. It pops up and enters the lamp hook 150. Accordingly, the end tab 119 is caught by the lamp hook 150 and no longer moved toward the disc side, thereby preventing the unlocking of the arbitrary HSA 110. The end tab 119 entering the lamp hook 150 moves along the inclination of the inner surface 151 of the lamp hook 150 and gradually moves away from the end tab moving surface 143, and thus the elastic restoring force of the suspension 117. Will also gradually increase. This increased elastic resilience of the suspension 117 causes the end tab 119 to move back in the opposite direction of arrow (ii) and rest on the end tab moving surface 143 or the end tab stop surface 144 and then the normal HSA. The HSA 110 may normally be loaded onto the disk 107 by the (110) rotation signal.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

According to the present invention, the parking of the HSA is not released in spite of the undesired external shock applied to the HSA parked in the lamp, thereby preventing permanent damage due to the collision of the disk and the head slider. In particular, according to a preferred embodiment of the present invention, the hard disk drive may be provided with a latch and a lamp hook to implement a more reliable HSA locking.

Claims (9)

The ramp is located on the outer periphery of the disk, which is a data storage medium of the hard disk drive, and supports an end-tap of the tip of the head stack assembly (HSA) when the head slider is parked. An inclined surface inclined in a direction in which the end tab is spaced apart from the surface of the disk as the end tab moves to an outer side of the disk, an end tab moving surface extending horizontally so that the end tab moves in a horizontal direction, and the end tab An end tab stop face that is stopped, a restriction wall that suppresses the release of the end tab settled on the end tab stop face, a hook that intercepts the end tab that escapes from the end tab stop face due to disturbance, and the end And a path converting means for guiding a path of the end tap to the hook side when the tab moves at a speed faster than the normal speed due to disturbance. According to claim 1, And the path converting means is a protrusion formed on the end tab moving surface. According to claim 1, And the hook is spaced apart from the end tab moving surface by at least a thickness of the end tab. According to claim 1, And the hook has an inner side surface inclined such that the end tab moves away from the end tab moving surface as the end tab gets closer to the center of the disk. A disk which is a data storage medium; A head stack assembly (HSA) having a head slider attached thereto for recording data on the disk or reproducing the data recorded on the disk, and having an end tab formed at a distal end thereof; And a lamp positioned at an outer periphery of the disk to support the end tab when the head slider is parked. An inclined surface inclined in a direction in which the end tab is spaced apart from the surface of the disk as the end tab moves to an outer side of the disk, an end tab moving surface extending horizontally so that the end tab moves in a horizontal direction, and the end tab An end tab stop face that is stopped, a restriction wall that suppresses the release of the end tab settled on the end tab stop face, a hook that intercepts the end tab that escapes from the end tab stop face due to disturbance, and the end And a path converting means for guiding the path of the end tab to the hook side when the tab moves faster than the normal speed due to disturbance. The method of claim 5, And the path converting means is a protrusion formed on the end tab moving surface. The method of claim 5, And the hook is spaced apart from the end tab moving surface by at least the thickness of the end tab. The method of claim 5, And the hook has an inner side surface inclined such that the end tab moves away from the end tab moving surface as the end tab gets closer to the center of the disc. The method of claim 5, And a latch intercepting a rear end of the HSA parked in a lamp to suppress rotation due to disturbance of the HSA.

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