JP2000322854A - Head support device, head device and disc device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a head support device, a head device and a disc device wherein the pitch angle and the roll angle are easily adjustable and a smooth pitch and roll motions can be ensured. SOLUTION: A support 4 has a free end in the length direction, a flexure 5 has two outer frames 121, 122, a side frame 11 and a center tongue 13. The outer frames 121, 122 extend along the lengthwise axial line L of the support 4 and are fixed to the support 4 by caulking 17, the side frame 11 connects the outer frames 121, 122 at one end apart from the free end of the support 4, and the center tongue 13 extends reversely to the free end direction from the side frame 11 and forms a free end 19 at the top, with leaving spacings 14 from the outer frames 121, 122. The tongue 13 has a head mounting region at the bottom face and the support 4 has a recess 3 at a portion corresponding to the free end 19 of the tongue 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a head support device, a head device, and a disk device for a flying recording / reproducing head.

[0002]

2. Description of the Related Art A floating type recording / reproducing head is used for high density recording / reproducing such as magnetic recording / reproducing, magneto-optical recording or perpendicular magnetic recording. Therefore, a basic requirement of the recording / reproducing head is that the pitch angle and the roll angle with respect to the recording / reproducing medium are held with high accuracy. The pitch angle indicates the angular attitude of the recording / reproducing head in the track scanning direction, and the roll angle indicates the angular attitude of the head device in the direction perpendicular to the track scanning direction.

The recording / reproducing head is mounted on a tongue formed at the center of a flexible body at one end of a head support device. The flexible body is attached to the free end of the support (rigid arm).

However, since the recording / reproducing head is attached with an adhesive or the like, the pitch angle and the roll angle often deviate from predetermined angles of the head support device. As adjusting means for correcting the angular deviation of the pitch angle and the roll angle, the outer frame portion and the horizontal frame portion of the flexible body around the recording / reproducing head are pressed with pins from both sides, respectively. There is known a method of providing a flexible bend.

When correcting the pitch angle and the roll angle of the recording / reproducing head according to this means, the flexible body must be greatly bent so as to exceed the yield point. However, the flexible body is provided with a tongue for mounting the recording / reproducing head, and in the case of a large bending exceeding the yield point, the free end of the tongue contacts the support. For this reason, it becomes difficult to correct the pitch angle and the roll angle.

Some flexible bodies whose angles have been corrected have a tongue-like portion close to the support. For example, the pitch angle or the roll angle is large when the disk drive is started or when a disk track is selected. May change, the tongues contact the support, and smooth pitch and roll movements may be impaired.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a head support device, a head device, and a disk device in which the pitch angle and the roll angle can be easily adjusted.

Another object of the present invention is to provide a head support device, a head device, and a disk device that can ensure smooth pitch motion and roll motion.

[0009]

In order to solve the above-mentioned problems, a head support device according to the present invention has a support and a flexible body.

The support has a free end at one end in the longitudinal direction, and the flexible body has two outer frames, a horizontal frame, and a central tongue. The outer frame extends in the longitudinal direction of the support and is fixed to the support; the horizontal frame connects the two outer frames at one end of the support away from the free end; Extends from the horizontal frame in a direction opposite to the direction of the free end at an interval from the outer frame, and the tip is a free end. The central tongue has a head mounting area on a lower surface, and the support has a recess at a portion corresponding to a free end of the tongue.

In the head support device according to the present invention, since the support has a concave portion at a portion corresponding to the free end of the tongue-shaped portion, when adjusting the pitch angle and the roll angle, the outside of the flexible body is required. Even when the frame and the horizontal frame are pressed, the tongue does not contact the support.

Further, even when the pitch angle or the roll angle greatly changes at the time of starting the disk device, selecting a track of the disk, or the like, the free end of the tongue-shaped portion operates in the recess and comes into contact with the support. There is no. For this reason, smooth pitch motion and roll motion can be ensured.

Other objects, configurations and effects of the present invention will be described in detail with reference to the accompanying drawings which are embodiments.

[0014]

FIG. 1 is a plan view of a head device according to the present invention, FIG. 2 is an enlarged perspective view of the tip of the head device shown in FIG. 1 as viewed from above, and FIG. FIG. 4 is an enlarged perspective view of the head device shown in FIG. The illustrated head device includes a head support device 1 and a head 2.

The head support device 1 has a support 4 and a flexible body 5. The support 4 has a free end 1 at one end in the longitudinal direction.
It is 6. The flexible body 5 has two outer frames 121, 12
2, a horizontal frame 11 and a central tongue 13. The outer frames 121 and 122 extend along the longitudinal axis L of the support 4 and are fixed to the support 4 by caulking 17.
The horizontal frame 11 connects the two outer frames 121 and 122 at one end of the support 4 away from the free end 16. The central tongue 13 extends in a direction opposite to the direction of the free end 16 from the horizontal frame 11 with the cutout groove 14 separated from the outer frames 121 and 122,
The tip is a free end 19. The central tongue 13 has a head mounting area on the lower surface.

On the side of the free end 16 of the support 4, a load projection 18 is provided. The projection 18 is on the mounting side of the flexible body 5 and presses the central tongue 13 at one point. The projection 18 allows the head 2 to perform a pitch motion and a roll motion. The protrusion 18 may be provided on the surface of the central tongue 13.

The support 4 is characterized by a tongue 13
Has a concave portion 3 at a portion corresponding to the free end portion 19.
The concave portion 3 shown in the embodiment has an arc shape.

The head 2 is mounted on the head mounting area of the central tongue 13. In the present invention, the transducer mounted on the head 2 can have at least one function of recording or reproduction. Various transducers, such as an electromagnetic transducer and a magneto-optical element, can be used. The electromagnetic transducer includes an inductive magnetic transducer, a magnetoresistive element, and the like. The magnetoresistive effect element includes a magnetic anisotropic resistance effect, a spin valve film structure, a ferromagnetic tunnel junction effect, and the like. In the case of an electromagnetic transducer, an in-plane recording / reproducing element and a perpendicular magnetic recording / reproducing element can be used.

FIG. 4 is an enlarged side view for explaining the angle adjustment of the head device shown in FIGS. In FIG.
Assuming that the angle θ0 is an appropriate pitch angle, it is assumed that the head 2 is shifted from the appropriate pitch angle θ0 by an angle θs. To correct the pitch angle θs to an appropriate pitch angle θ0, for example, the pressing points P1 and P2 are pressed from the front and back, respectively. Assuming that the maximum tilt angle θL is larger than the angle corresponding to the yield point of the central tongue 13, the central tongue 13 is bent by bending the central tongue 13 to the vicinity of the maximum tilt angle θL. Plastic deformation, and the pitch angle can be adjusted to an appropriate angle θ0. In this case, in the head device according to the present invention, the support 4
In addition, since the concave portion 3 having a depth corresponding to the maximum tilt angle θL exceeding the yield point is provided, the free end 19 can be tilted to the bottom of the concave portion 3 to adjust the angle of the head 2.
The maximum tilt angle θL refers to the angle at the time when the free end 19 of the central tongue 13 contacts the bottom surface of the recess 3.
The maximum tilt angle θL can be changed by selecting the depth, size, bottom shape, and the like of the concave portion 3.

FIG. 5 is a view showing another embodiment of the head device according to the present invention. In the drawings, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals.

In the embodiment of FIG. 5, the recess 3 has a bottom surface constituted by at least two flat surfaces 31 and 32.
If the one surface 31 of the recess 3 has an inclination angle substantially equal to the maximum tilt angle θL of the tongue 13, the tongue 13 does not contact the support 4. The other surface 32 is preferably short. With such a design, the size of the concave portion 3 in the longitudinal direction is shortened, so that a small head device can be obtained.

FIG. 6 shows another embodiment of the head device according to the present invention. In the drawings, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals. In the illustrated embodiment, one surface 31 of the recess 3 is a flat surface, while the other surface 33 is flat.
Has a curved surface. Since the surface 33 is a curved surface, the concave portion 3
There is an advantage that the service life of the mold for molding the metal is prolonged. Although not shown, the bottom surface shape of the concave portion 3 can naturally take a combination of a larger number of planes, an arc shape having a different curvature, or a combination thereof.

FIG. 7 is a plan view of a disk device using the head device according to the present invention, and FIG. 8 is an enlarged front view of the disk device shown in FIG. In the drawings, the same components as those shown in FIGS. 1 to 6 are denoted by the same reference numerals. The disk device includes a head device 8 and a disk 6. As the head device 8, the head device illustrated and described in FIGS. 1 to 6 is used. Disk 6
The information is recorded or the recorded information is reproduced by the head 2 of the head device 8. As the disk 6, various types of currently known recording systems can be used. Specifically, it is a magnetic disk or a magneto-optical disk.

As described above, the head 2 of the head device 8 has one of a magnetic recording / reproducing function, a magneto-optical recording / reproducing function. Which function is selected depends on the recording method of the disk 6.

The head device 8 is attached to the positioning device 7 by means of a caulking 28 or the like, using a head attachment hole 25 at the base of the support 4. The disk 6 is rotationally driven at a high speed in a direction of an arrow a by a driving device (not shown). Due to this high-speed rotation, a lift dynamic pressure is generated in the head 2 supported by the flexible body 5, and the head 2 floats while maintaining a small gap (flying amount). The head 2 seeks a track on the disk 6 in the direction of b1 or b2 by the positioning device 7 to record and reproduce information.

Here, the free end 19 of the tongue 13 moves inside the recess 3 even when the pitch angle or the roll angle changes greatly, for example, when the disk drive is started or when the track of the disk 6 is selected. Therefore, there is no contact with the support 4. For this reason, smooth pitch motion and roll motion can be ensured.

[0027]

As described above, according to the present invention, the following effects can be obtained. (A) It is possible to provide a head support device, a head device, and a disk device that can easily adjust the pitch angle and the roll angle. (B) It is possible to provide a head support device, a head device, and a disk device that can ensure smooth pitch motion and roll motion.

[Brief description of the drawings]

FIG. 1 is a plan view of a head device according to the present invention.

FIG. 2 is an enlarged perspective view of a tip portion of the head device shown in FIG. 1 as viewed from above.

FIG. 3 is an enlarged perspective view of the head device shown in FIG. 1 as viewed from a lower surface side.

FIG. 4 is an enlarged side view for explaining the angle adjustment of the head device shown in FIGS. 1 to 3;

FIG. 5 is a view showing another embodiment of the head device according to the present invention.

FIG. 6 is a view showing another embodiment of the head device according to the present invention.

FIG. 7 is a plan view of a disk device using the head device according to the present invention.

8 is an enlarged front view of the disk device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head apparatus 2 Head 3 Concave part 4 Support body 5 Flexible body

Continued on the front page (72) Inventor Makoto Ohashi 1-1-13 Nihonbashi, Chuo-ku, Tokyo TDK Corporation (72) Inventor Yukito Kawano 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDK Corporation (72) Inventor Mitsuo Hayashi 1-13-1 Nihombashi, Chuo-ku, Tokyo FDC term in TDK Corporation (reference) 5D039 AA01 BA02 BC02 BC25 CA09 5D059 AA01 BA01 CA16 CA18 DA17 DA26 EA07

Claims (7)

[Claims] 1. A head support device having a support and a flexible body, wherein the support has a free end at one end in a longitudinal direction, and the flexible body has two outer frames, A lateral frame and a central tongue-shaped portion, wherein the outer frame extends in the longitudinal direction of the support and is fixed to the support, and the lateral frame has two ends at one end remote from the free end of the support. Connecting the outer frame, the central tongue extends in a direction opposite to the direction of the free end from the horizontal frame at a distance from the outer frame, and the tip is a free end,
The head support device, wherein the central tongue has a head mounting area on a lower surface, and the support has a recess at a portion corresponding to a free end of the tongue. 2. The head support device according to claim 1, wherein the recess is curved in an arc shape. 3. The head support device according to claim 1, wherein the recess has a bottom surface formed by at least two surfaces. 4. A head device including a head support device and a head, wherein the head support device is as described in any one of claims 1 to 3, wherein the head is the tongue-shaped portion. A head device attached to the head attachment region of the above. 5. The head device according to claim 4, wherein the head includes at least one of a recording head and a reproducing head. 6. A disk device including a head device and a disk, wherein the head device is as described in claim 4 or 5, wherein the disk has information recorded by the head device. Disk device to be recorded or played. 7. The disk device according to claim 6, wherein the head device has one of a magnetic recording function and a magneto-optical recording function.