JPH06509435A - Thin head disk assembly - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 梠 85 Rad Disc Assembly (Technical field) The present invention is used in dynamic magnetic recording devices or rigid disk drives. The present invention relates to an improved magnetic head assembly (HDA). In particular, the present invention , reducing the overall height of the magnetic helad disk assembly (HDA) and disk drive. This invention relates to a thin magnetic disk assembly with improved manufacturability. Ru.

(Background technology) Today, in the recording media industry, there are very small and low-volume products that can be manufactured and sold at low cost. feel the need for a single disk drive. Such devices are notebook type Ideal for fields that require extremely small packages, such as personal computers. used. This provides a low-cost, low-profile solution for small, single-disk drives. There is a need for HDA.

Traditionally, suspension pace plates are welded to one end of the suspension load beam. This base plate attaches the suspension to the actuator arm. It is used to These suspension eyes are connected to the actuator arm and each device. The height of such an ODA is It is at a certain height. The present invention fuses the load beam to the actuator arm. Both actuator and suspension base plate are in contact at the same time. The actuator arm is flush with the disc and the suspension is not located between the actuator arm and the disc. In this way, The height of the head disk assembly (HDA) has been reduced. single disk If used, the space savings would be approximately 1.27+a+i (0,050″) or is approximately 37% of the total height of the stacked disks.

Some of the traditional examples are to reduce space on very large disk drives. The load beam was welded to the actuator in an integrated structure. But long In such a device, the actuator arm extends over the disk and However, it was not placed directly around the bearing. Instead, those traditional The tuator arm was provided with a separate positioning device that contacted the bearing. difference In addition, the actuator that protrudes above the disk used in conventional large disk drivers The tuator had an undesirably large inertia. According to an embodiment of the invention , the actuator arm does not extend above the disk, making it a very small disk drive Closely coupled to the bearing assembly, facilitating the use of suspensions in It will be done.

Although the actuator arm extends above the disk, the present invention by having a very thin and short structure (so that it can fit into a disc drive). Embodiments are also provided that reduce the

Combined actuator assembly used in traditional large disk drives has many complicated parts and spacers, and the present invention is suitable for small disk drives. This helped make it easier to manufacture arms and spacers that would fit the spacer.

(Disclosure of invention) The head disk assembly consists of the following: a, a rigid disk; b, Two actuator plates are stacked back to back and the The centerline is flush with the disc centerline and the actuator plate is The actuator plates are centered around a common axis. Rotatable; C3 A bearing that can rotate around a common axis and an actuator fixed to the disk drive. Attach one end to each actuator plate and attach the other end to the actuator plate; two load beams having head stack assemblies formed at their end portions; e. forming or attaching gimbals to a portion of each load beam; f, each gimbal is equipped with a read/write head that operably interacts with the surface of the disk. I attached it.

The basic components of one embodiment of a thin HDA according to the present invention include a single assembly. Stampable actuator plate with single load beam welded to form This means that you are using the Two or more assemblies on the bearing The E-block actuators of conventional HDAs were eliminated. In addition , the cost is significantly reduced, and the total height of the HDA of the present invention is lower than that of the conventional HDA. It decreased by more than 35%.

The object of the invention is to provide a single actuator and suspension base plate structure. An object of the present invention is to provide an improved head disk assembly having the following features.

Another object of the present invention is to provide a head stack or head stack with reduced vertical disk spacing. Or to provide a helad disk assembly.

A further object of the invention is to reduce the number of components so that manufacturing and assembly are easy and inexpensive. The objective is to provide a head disk assembly.

For other objects of the invention, see the drawings, the description of the preferred embodiments, and the claims. It will become clear.

(Brief explanation of the drawing) FIG. 1 is a perspective view of a conventional head disk drive assembly.

FIG. 2 is a cross-sectional view of the conventional head disk drive assembly shown in FIG. .

FIG. 3 shows an embodiment of the invention in which the actuator plate does not extend over the disk. FIG.

FIG. 4 is a cross-sectional view of the embodiment shown in FIG. 3 used in multiple disks.

FIG. 5 is a cross-sectional view of the embodiment shown in FIG. 3 used in a single disk.

Figure 6 shows that the actuator plate extends over the disk but is relatively thin. A perspective view of an embodiment of the present invention, located between the load beam and the disk. It is a diagram.

FIG. 7 is a cross-sectional view of the embodiment shown in FIG. 6 used for multiple disks.

FIG. 8 is a cross-sectional view of the embodiment shown in FIG. 6 used in a single disk.

FIG. 9 is a perspective view of an additional embodiment of the invention.

(Detailed description of the invention) The head disk drive assembly according to the present invention includes a base plate and an actuator. The limitations of the prior art are overcome by forming the tuator in a single piece. single part manufacturing of the head disk assembly components is greatly simplified. The overall height of the assembly is reduced.

Furthermore, the head disk assembly according to the present invention has a head on the suspension. Attach the base plate of this suspension to the actuator arm. It includes the fact that it is a missing part. Each actuator arm is fitted with conventional bearings. polymerized and placed, pressed or glued in place, or in a similar manner Fixed. The actuator assembly is attached to the head or to the end of the load beam. or the slider is installed and the actuator arm does not extend over the disc. Positioned to control tracking of the entire surface of the rigid disk.

The actuator arm may be a single piece for each disc. or two members (one for each suspension) or three members (two Actuator arm and one spacer) The centerline of the actuator with or without a spacer is flush with the disc; The overall height of the head disk assembly is thus reduced.

To explain based on the figures, FIGS. 1 and 2 show the E block type actuator 12. This figure shows a head disk assembly IO using conventional swaging technology. Ru. The E-block 12 may be conventionally cast or extruded, with its protruding The suspension contact area 14 of the arm is finished flat. Next, The borehole 16 is drilled by a drill, reamer or discharge device. Finally, The suspension assembly (ISA) 18 includes an actuator arm 20. It is embedded in The end of the actuator arm 20 is between the discs 26 , each HS A 18 is sandwiched between each contact area 14 and the disc. I want to be noticed. This due to the swaging technique reduces the height of the HDA. limiting possibilities.

FIGS. 3, 4 and 5 show an embodiment of the thin HDA 28 of the present invention. The cases where several 30 disks and 32 single disks are arranged are shown in Fig. 4 and Fig. 5, respectively. ing. Individual stacked actuators instead of those processed into E blocks. A single piece of tuator plate 34 may be disposed around a conventional bearing 36. I want to be noticed. Actuator plate 34 can be fabricated in a number of different ways. It is attached to the bearing 36 using. For example, use a suitable adhesive to The data plate may be fixed to the bearing, or one of several interference fit techniques may be used. You may use one of them. Utilizes temperature shrinkage in conjunction with press-fit technology. All backfits could be used.

The load beam 38 is attached directly to the actuator plate 34, for example by welding. It is attached. In this example, the actuator plate is on the disk surface. placed on the outside of the disc without stretching, substantially reducing the height of the HDA. ing.

By using the structure shown in FIGS. 3 to 5, the following steps are eliminated.

Book: Extruding or casting complex E blocks and integrating them with actuator arms Assembly * Finishing of the surface that is swaged and installed on the load beam. Smell of the present invention The actuator arm can be stamped and welded together No special processing is required.

Drill holes for swaging that are not necessary for direct welding or joining using clamps according to the present invention. Drill with a drill or reamer.

* Included.

According to the invention, the HDA 2 in which relatively thin load beams 38 are stacked 8 at the tip of the slider and load beam assembly without increasing the height of the slider and load beam assembly. Since it has a reversing rail 40 that protrudes in the direction of the HDA, the total height of the HDA can be can be qualitatively reduced and surpassed by the prior art.

Further, according to the present invention, the spacing between disks 42 can be adjusted using conventional techniques. The vine spacing achieved is smaller than that of the head suspension coupling assembly and Patent Application No. 542.423 filed on June 22, 1990 entitled Space spacing and comparison with head suspension connection method using swage connection It is low in comparison.

Figure 61 Figures 7 and 8 show a second embodiment of the thin HDA 44 according to the present invention. , the shapes when used for multiple 46 disks and single 48 disks are shown in Figures 7 and 8. Each is shown. In this embodiment, the actuator plate 50 is extending over the surface of disk 52 but located between load beam 54 and disk 52. Ru. In this way, the total height of the second embodiment 44 of the HDA is the same as that of the first embodiment 28. It belongs to Mr. The second embodiment 44 has greater inertia than the first embodiment 28. However, a shorter load beam 54 is used to provide the capability. shorter load beam 54 typically demonstrates improved resonant performance. multiple disks 46 is composed of four actuator plates 50 and three spacers 5. 6 and 48 with two actuator plates when placing a single disk 50 and one spacer 56.

FIG. 9 shows a third embodiment of a thin HDA according to the present invention. In this example In this case, the actuator plate 62 is arranged around another cylindrical bearing member 66. It has an opening 64 so that it can be placed in the the spring 64 and the bearing 66 so that a tight fit is created between the spring 64 and the bearing 66. Fasten with.

The integrally formed actuator plate has an upper load beam 76 and a lower load beam. 78 are mounted adjacent to the upper and lower surfaces of the actuator arm, respectively. . As shown in this example, the load beam is fitted with elastic retaining clips 8o and 82. This clip was fixed to the actuator arm on September 9, 1990. Load beam 76 as described in filed application number 7-612012. This embodiment may have a structure where the and 78 are integrally formed or a separate structure. has a relatively simple structure and does not require the use of a complex E block structure. The coupling between the load beam 76 and the actuator arm 78 is easily achieved. Moreover, it can be attached and detached when the assembly needs to be repaired or reassembled.

FIG.1

Claims (30)

[Claims] 1. one rigid disk, Two plates are placed back to back and the center line between them is the center of the disc. is flush with the line and rotates automatically around a common axis without extending over the disk surface. The actuator plate is rotatable about the common axis and the front a bearing that secures the actuator plate to the disk drive; Each is mounted on opposite sides of each actuator plate and two load beams formed at the tip of the assembly; a gimbal means associated with each load beam; and a gimbal means attached to each gimbal means; read/write head means for interacting with the surface of the disk; A rigid disk drive assembly comprising: 2. characterized in that the load beam is welded to the actuator plate. 2. The disk drive assembly of claim 1. 3. The actuator plate is formed by stamping or similar process. 2. The disk drive assembly of claim 1, wherein: 4. characterized in that the load beam is glued to the actuator plate. 4. The disk drive assembly of claim 3. 5. that the load beam is swage-jointed to the actuator plate; 4. The disk drive assembly of claim 3. 6. the load beam is attached to the actuator plate by a tight fit; 4. The disk drive assembly of claim 3, further comprising: a disk drive assembly; 7. Claim 6, wherein the interference fit is an interlocking interference fit. Disk drive assembly included. 8. one rigid disk, The center line is on the same plane as the center line of the disc and does not extend onto the disc surface. One actuator plate that is rotatable around an axis, The actuator plate is rotatable around the common axis, and the actuator plate is connected to the disk drive. one bearing fixed to the eve, Each is attached to opposite sides of the actuator plate and the head stack two load beams formed at the tip of the assembly; a gimbal means associated with each load beam; and a gimbal means attached to each gimbal means; read/write head means for interacting with the surface of the disk; A rigid disk drive assembly comprising: 9. characterized in that the load beam is welded to the actuator plate. 9. The disk drive assembly of claim 8. 10. The load beam is attached to the actuator plate using a clip. 9. The disk drive assembly of claim 8. 11. (a) one rigid disk; (b) Two plates are stacked back-to-back above and below the plane of the disc, actuator plate that is rotatable around a common axis parallel to the axis of rotation of the disk; and, (c) Make the axis of the actuator plate rotatable and remove the actuator arm. a bearing fixed to the disk drive housing; (d) Attached to each actuator plate and attached to the head stack assembly or or two load beams formed at the tip of the actuator assembly; (e) gimbal means associated with each load beam; (f) a magnetic readout attached to each gimbal means and interacting with the surface of the disk; for a magnetic recording media device comprising: a write head means; Thin magnetic head disk drive assembly. 12. The actuator plate is fixed to the bearing at intervals using spacers. , a claim characterized in that the actuator plate is rotatable around the axis of the actuator plate. 11. The head disk assembly according to 11. 13. characterized in that the load beam is welded to the actuator plate. The head disk assembly according to claim 11. 14. The actuator plate is formed by stamping or similar process. 12. The head disk assembly according to claim 11, wherein the head disk assembly is formed as follows. Buri. 15. The load beam is attached to each actuator plate and The center plane of the paired actuator plates is on the same plane as each disk. The head disk assembly according to claim 11, characterized in that: 16. characterized in that the load beam is glued to the actuator plate. The head disk drive assembly according to claim 11. 17. The load beam may be an interference fit such as a press fit, clip or swage. 12. The head disk drive according to claim 11, wherein the head disk drive is Bu assembly. 18. (a) a plurality of rigid disks; (b) Two plates are stacked back to back and the center line between them is the disc an actuator that is coplanar with the center line of and rotatable around a common axis plate and (c) Make the axis of the actuator plate rotatable and remove the actuator arm. a bearing fixed to the disk drive housing; (d) Each attached to each actuator plate and head stack assembly. Two load beams forming the tip of the actuator assembly and, (e) gimbal means associated with each load beam; (f) a read/write head attached to each gimbal means and interacting with the surface of the disk; A thin magnetic head for a magnetic recording medium, comprising: a head means for a magnetic recording medium; hard disk drive assembly. 19. The actuator plate is fixed to the bearing at intervals by spacers. 19. The head according to claim 18, wherein the head is rotatable about a common axis. disk assembly. 20. characterized in that the load beam is welded to the actuator plate. The head disk assembly according to claim 18. 21. The actuator plate is stamped or stamped by a similar process. 19. The head disk assembly according to claim 18, wherein the head disk assembly is formed by Li. 22. The load beam is attached to each actuator plate and The center lines of the paired actuator plates are flush with the center lines of each disk. 17. A head disk assembly as claimed in claim 16. 23. characterized in that the load beam is glued to the actuator plate. The head disk assembly according to claim 18. 24. The load beam is an interference fit such as a press fit, or a clamp on the actuator plate. Claim 18, characterized in that they are joined by a lip or a swage. head disk assembly. 25. A claim characterized in that the actuator arm is attached to a bearing. 19. The head disk assembly according to any one of 1, 8, 11, and 18. 26. The actuator plate is attached to the bearing by an interference fit 26. The head disk assembly according to claim 25. 27. 27. The head according to claim 26, wherein the interference fit is a press fit. disk assembly. 28. 27. The head according to claim 26, wherein the tight fit is a shrink fit. disk assembly. 29. Claim 2, wherein the interference fit is provided by a retaining ring. 6. The head disk assembly described in 6. 30. Make sure the actuator plate is attached to the bearing with adhesive. 26. The head disk assembly of claim 25.