JP4711990B2 - Lamp for magnetic disk drive - Google Patents

Description

  The present invention relates to a lamp for a magnetic disk device used in a load / unload mechanism for retracting a magnetic head to the outside of a magnetic disk when the drive is stopped or during a non-read / write operation in a magnetic disk device such as a hard disk drive.

  A magnetic disk device such as a hard disk drive is provided with a load / unload mechanism for retracting the magnetic head to the outside of the magnetic disk when the drive is stopped or during non-read / write operations. The magnetic head is retracted when the magnetic head rides on a ramp disposed on the outer peripheral side of the magnetic disk. This ramp usually has an inclined surface that slides and holds the magnetic head, and a facing surface that faces the recording surface of the magnetic disk and is provided to secure a space for the outer periphery of the magnetic disk to rotate and pass. And.

In recent years, many lamps are made of resin because they are easy to mold and have excellent friction characteristics. Further, in order to smoothly move the magnetic head between the magnetic disk and the ramp, the distance between the facing surfaces of the front end of the ramp facing the magnetic disk is very narrow. For this reason, an impact or the like is applied to the magnetic disk device, and the magnetic disk and the lamp may collide. When the magnetic disk and the lamp collide, both the magnetic disk and the lamp may be damaged or deformed. Dust may be generated. If such damage or deformation occurs or dust is generated, the performance of the magnetic disk device is adversely affected.
An example of a technique aiming at preventing damage and deformation caused by the collision between the magnetic disk and the lamp described above is described in Patent Document 1.

JP 2002-367314 A

  According to the technique disclosed in Patent Document 1, even when an impact is applied, the magnetic disk is shaken, and even if it collides with the tip of the lamp, the member having the inclined surface escapes in the direction pressed by the magnetic disk. This prevents a large load from being applied to the magnetic disk and the ramp mechanism. However, the structure described in Patent Document 1 has a complicated structure for realizing that a member having an inclined surface escapes in the direction pressed by the magnetic disk, and such a structure is originally used in a minute lamp. If there is, the structure itself may be damaged by the impact of the magnetic disk and may not function.

  The present invention has been made in consideration of such circumstances, and even when a magnetic disk collides, the impact due to the collision can be absorbed with a simple structure, and the function as a load / unload mechanism is sufficiently achieved. An object of the present invention is to provide a lamp for a magnetic disk device that can be applied to the above.

  In order to solve the above-described problems, the magnetic disk device lamp of the present invention is a magnetic disk device lamp used for retracting the magnetic head outside the magnetic disk when the drive is stopped or during non-read / write operations. The lamp body has a function of retracting the magnetic head, and an attachment portion for attaching the lamp body to the magnetic disk device, and the lamp body has a recording surface of the magnetic disk at a tip portion facing the magnetic disk. It has an opposed surface, and a notch is provided in a region near the mounting portion on the surface opposite to the opposed surface.

The outer periphery of the magnetic disk rotates in the vicinity of the facing surface facing the recording surface of the magnetic disk. When an impact is applied to the magnetic disk device and the magnetic disk and the lamp collide, the magnetic disk is brought into the facing surface. The contact surface is pressed and the opposing surface is pressed, and the load caused by this may cause damage or deformation to the magnetic disk and the lamp, or dust may be generated. In the present invention, the surface opposite to the opposing surface is attached. Since the notch portion is provided in the region closer to the portion, the tip of the lamp body bends when the opposing surface is pressed, and the load due to the pressure can be absorbed, so that the lamp can be prevented from being damaged or deformed. . Further, since the impact received by the magnetic disk is weakened, the magnetic disk can be prevented from being damaged. In addition, dust can be prevented from being generated when the lamp body collides with the magnetic disk.
Absorption of the load when the opposing surface is pressed is also made in Patent Document 1, but in Patent Document 1, some members are required to realize load absorption, In the present invention, the absorption of the load is realized by utilizing the bending of the tip portion by providing the notch portion, the structure is simple, and failure is unlikely to occur.

  In addition, since the tip of the lamp body has a function of retracting the magnetic head, an area where the magnetic head is slid and held is necessary, but the area where the magnetic head is slid and held If there is a notch in the magnetic head, the magnetic head will be caught by the notch during sliding, and the magnetic head will not be able to move smoothly, thereby hindering the escape function. However, in the present invention, the notch portion is provided in the region near the attachment portion, and the region that is not provided near the attachment portion and is not provided near the attachment portion is an area necessary for the magnetic head to slide and be held. Assured. Therefore, the presence of the notch does not cause a situation in which the magnetic head is caught on the notch during sliding.

  In the magnetic disk drive lamp of the present invention, the notch portion can be provided in a region near the mounting portion on the end surface side that is continuous with the facing surface, out of the surface opposite to the facing surface.

  Of the surfaces opposite to the facing surface, the end surface side that is connected to the facing surface is structurally located at the base of the tip of the lamp body, so if a notch is provided at this position, Is effective for preventing the tip portion from being damaged by the bending of the tip portion.

The lamp for a magnetic disk device according to the present invention is characterized in that the lamp main body provided with the above-mentioned notch is arranged in multiple stages.
Thus, in the magnetic disk device having a structure in which a magnetic disk having recording surfaces on both the front and back surfaces is mounted and in the magnetic disk device having a structure in which a plurality of magnetic disks are mounted, a notch is provided in each of the lamp bodies. Therefore, when one lamp body receives a load, each can bend independently and does not affect other lamp bodies, thus effectively preventing the lamp and magnetic disk from being damaged. be able to.

  According to the present invention, even when a magnetic disk collides, a magnetic disk drive lamp capable of absorbing the impact due to the collision with a simple structure and sufficiently exhibiting the function as a load / unload mechanism. Can be realized.

The magnetic disk drive lamp of the present invention will be described below based on the embodiments. In the following description, the magnetic heads are arranged on both sides of the magnetic disk, and areas on which the magnetic head slides when the magnetic head is retracted are provided on both sides of the magnetic disk, respectively. The same applies to the case where the magnetic head is arranged only on one side of the magnetic disk and the sliding area of the magnetic head is provided only on one side of the magnetic disk.
FIG. 1 shows an overview of a magnetic disk apparatus to which a magnetic disk apparatus lamp of the present invention is attached.
In the magnetic disk device 1 shown in FIG. 1, a magnetic disk 3 is mounted in a housing 2, and information is written to and read from the magnetic disk 3 by a magnetic head provided at the tip of an actuator (not shown). When the drive is stopped or in a non-read / write operation, the magnetic head is retracted to the outside of the magnetic disk 3, which is retained by sliding the magnetic head on the ramp 4 provided on the outer peripheral side of the magnetic disk 3. Is done by doing.

  FIG. 2 shows the structure of the lamp 4. 3 shows a plan view seen from the direction of the arrow in FIG. 2, FIG. 4 shows a view taken along arrow A in FIG. 3, and FIG. 5 shows a cross-sectional view along BB in FIG.

  As shown in FIG. 2, the lamp 4 includes a lamp main body 11 having a function of retracting the magnetic head and an attachment portion 12 for attaching the lamp main body 11 to the magnetic disk device 1. The lamp body 11 and the mounting portion 12 can be formed so as to be integrated by resin molding. The mounting portion 12 is provided with a mounting hole 12a.

The lamp body 11 is formed at a tip portion 13 facing the magnetic disk 3 so as to be substantially parallel to the recording surface of the magnetic disk 3, two opposing surfaces 14 facing the magnetic disk 3, and the two opposing surfaces. 14, and the outer peripheral portion of the magnetic disk 3 rotates and passes through the recess 16. An inclined surface 18 is formed on the upper surface 17 side corresponding to the surface opposite to the facing surface 14, and the magnetic head slides and rides on the inclined surface 18 so that the magnetic head is held and retracted. When the magnetic head is disposed on both sides of the magnetic disk, an inclined surface 18 is also formed on the lower surface 19 side of the front end portion 13, and the magnetic head slides on this surface and retracts.
Thus, the tip 13 of the lamp body 11 is located at least on the facing surface 14 facing the magnetic disk 3, the end surface 15 connected to the facing surface 14, and the opposite side of the facing surface 14, and the magnetic head slides. In the case of FIG. 2 in which the magnetic head is disposed on both sides of the magnetic disk, the recess 16 is formed by two opposing surfaces 14 and an end surface 15 connecting the two opposing surfaces 14. And two inclined surfaces 18 on which the magnetic head slides. When the magnetic head is disposed only on one side of the magnetic disk, the tip 13 of the lamp body 11 is positioned on one opposing surface 14, an end surface 15 that continues to the opposing surface 14, and the opposite side of the opposing surface 14. Thus, it has one inclined surface 18 on which the magnetic head slides.

  On the upper surface 17 of the lamp body 11, a notch 20 is provided above the end surface 15 that forms the recess 16 and in a region near the mounting portion 12. Similarly, the lower surface 19 of the lamp body 11 is provided with a notch 20 below the end surface 15 that forms the recess 16 and in a region near the mounting portion 12. The cutout portion 20 may be cut out in the thickness direction of the lamp body 11 and the shape thereof is not limited to the illustrated rectangular shape. Further, the depth (Y direction in FIG. 2) and the width (X direction in FIG. 2) of the notch 20 are appropriately selected depending on the size, material, and the like of the lamp body 11. Further, the depth of the notch 20 can be various shapes such as deeper, shallower, or penetrating the portion closer to the attachment portion 12. Further, the width of the notch 20 can be various shapes such as increasing or decreasing the width closer to the mounting portion 12.

  Since the distance between the two facing surfaces 14 at the front end portion 13 of the lamp body 11 is very narrow, when an impact is applied to the magnetic disk device 1 and the magnetic disk 3 and the lamp 4 collide, the magnetic disk 3 faces. Although the opposing surface 14 is pressed by contacting the surface 14 and a load is applied in the direction in which the opposing surface 14 is pressed, the magnetic disk and the lamp may be damaged or deformed, or dust may be generated. In the present invention, a notch 20 is provided in a portion corresponding to the base of the tip portion 13, and the presence of the notch portion 20 allows the tip portion 13 to bend even when the opposed surface 14 is pressed, thereby absorbing the load. Therefore, damage and deformation of the lamp can be prevented. Further, since the impact received by the magnetic disk 3 is weakened, the magnetic disk 3 can be prevented from being damaged. Moreover, generation | occurrence | production of dust can be prevented.

  As shown in FIG. 4, the position where the notch 20 is provided is not limited to above and below the end surface 15 forming the recess 16, and if the tip 13 is ensured to be bent, It may be in the vicinity. For example, the notch 20 may be provided at any position above the recess 16 in the upper surface 17 of the lamp body 11 and at any position below the recess 16 in the lower surface 19 of the lamp body 11.

Further, the tip 13 of the lamp body 11 needs to secure an area where the magnetic head is slid and held when the magnetic head is retracted. In the present invention, this is taken into consideration. The notch portion 20 described above is provided at a position close to the mounting portion 12, and the notch portion 20 is provided in an area on the opposite side necessary for sliding and holding the magnetic head. Absent. In FIG. 2, the notch 20 having the length W2 is provided with respect to the length W1 of the tip 13, and the magnetic head slides in a region not provided with the notch 20 that is not close to the attachment 12. It is an area held as If the cutout portion 20 is provided in the area where the magnetic head is slid and held, the magnetic head is caught by the cutout portion 20 during sliding, and the magnetic head cannot move smoothly, and the magnetic head is retracted. Although the function is affected, in the present invention, such a problem does not occur because the position of the notch 20 is considered as described above.
For this reason, the length W1 of the front end portion 13 needs to be long enough to provide the cutout portion 20 while ensuring the function of holding the magnetic head.

  FIG. 6 shows the structure of the ramp 4 of the magnetic disk apparatus in which two magnetic disks are mounted. The ramp having the above-described notch portion 20 is vertically stacked in two stages. In the case of a magnetic disk device in which three or more magnetic disks are mounted, a lamp having the above function can be realized by stacking three or more lamps having the same structure in multiple stages.

  The present invention provides a magnetic disk drive lamp capable of absorbing the impact caused by the collision with a simple structure even when the magnetic disk collides, and capable of fully exhibiting the function as a load / unload mechanism. Can be used.

It is a figure which shows the general view of the magnetic disk apparatus with which the ramp for magnetic disk apparatuses of this invention was attached. It is a figure which shows the structure of a lamp | ramp. It is the top view seen from the arrow direction in FIG. It is A arrow directional view in FIG. It is BB sectional drawing in FIG. It is a figure which shows the structure of the lamp | ramp of the magnetic disk apparatus with which two magnetic disks are mounted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnetic disk apparatus 2 Housing 3 Magnetic disk 4 Lamp 11 Lamp main body 12 Mounting part 12a Mounting hole 13 Tip part 14 Opposing surface 15 End surface 16 Recessed part 17 Upper surface 18 Inclined surface 19 Lower surface 20 Notch

Claims (3)

  In a lamp for a magnetic disk device used for retracting a magnetic head to the outside of a magnetic disk when the drive is stopped or in a non-read / write operation, a lamp body having a function of retracting the magnetic head; The lamp body has a facing surface facing the recording surface of the magnetic disk at the tip portion facing the magnetic disk, and the mounting portion on the surface opposite to the facing surface. A lamp for a magnetic disk drive, characterized in that a notch portion is provided in a close area.   2. The magnetic disk apparatus according to claim 1, wherein the cutout portion is provided in a region near the mounting portion on an end surface side continuous with the facing surface among surfaces opposite to the facing surface. Lamp.   3. The lamp for a magnetic disk device according to claim 1, wherein the lamp body provided with the notch is arranged in multiple stages.

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