JPH0453075A - Head slider device - Google Patents

Abstract

PURPOSE:To obtain a stable floating state and to improve an electromagnetic converting characteristic by widening a side, where the line of a disk rotating direction has a skew angle to a central line, toward the outside gradually from the back to the front. CONSTITUTION:On the face counter to the disk in a main body 1 of a slider, positive pressure generating parts 2 and 3 are respectively provided at symmetrical right and left positions with the central line as a center, and these respective positive pressure generating parts are composed of tapered parts 2a and 3a, which are provided on an air flow-in side so as to receive air, and rail parts 2b and 3b on the same plane continuous to these tapered parts. In a pair of these rail parts, the side for the line of the disk rotating direction to have a skew angle theta to the central line is widened toward the outside gradually from the back to the front. Since the front side in a pair of rail parts receives large floating force caused by an air current rather than the back side, a floating posture having a large pitch angle is obtained and a moment is operated in a direction to cancel a rolling moment. Therefore, the generation of rolling (inclination) is suppressed.

Description

[Detailed description of the invention] The present invention relates to a positive pressure type Herad slider device.

[Summary of the Invention] The present invention provides a structure in which a slider body is attached to the tip of a support arm,
In a head slider device that moves the slider body in the radial direction of the disk by rotating the support arm, positive pressure generating portions are provided at symmetrical positions on the disk-facing surface of the slider body with respect to the center line. , each of these positive pressure generating parts is composed of a tapered part of an air receiver provided on the air inflow side and a rail part that is flush with the tapered part, and of the pair of rail parts, the direction of rotation of the air with respect to the center line is By configuring the side where the line has a skew angle to be wide so that the width gradually increases outward from the rear to the front, the front side of the pair of rails is wide, so it receives a large floating blade from the airflow, and , the airflow outflow side of each rail section is located at a skew angle and has a high pressure distribution.
The airflow is close to the center of rotation in the rail section of the flow, while it is far from the center of rotation in the downstream rail section.However, because the upstream rail section is wide and spreads outward, the airflow compressed in the tapered section is located downstream. Compared to the rail section, a larger amount is held below the rail, and with a posture that maintains a larger pitch angle than the above, it has a stable floating with less rolling (tilting) even in a position with a skew angle. -1- state is obtained.

1. Prior Art 1 There are two types of hard disk drive device t\rad lidar device: an arm sliding type and an arm co-moving type. FIGS. 6 to 1O show conventional examples of the arm co-moving type.

In FIG. 6, the support arm 10 is made of a plate spring material, and is rotatably supported on the rotation shaft 11 at its base end. A slider main body 1 is attached to the tip of the support arm IO, and the slider main body 1 is provided so as to be swingable back and forth and left and right with respect to the support arm 10. Multilayer rotating shaft 11
is rotationally controlled by a drive means (not shown), and the support arm 1
0 rotation, the slider body 1 moves along the radial direction of the disk 5, thereby forming the innermost track L/rack Ti and the outermost track T.
Move between o. The slider body I is arranged so that its center line C is located at the innermost track Ti in a tangential direction to the innermost track Ti (disc rotation direction line). FIG. 7 shows a perspective view of the slider body 1, in which positive pressure generating portions 2.3 are protruded from the disk-facing surface of the slider body 1 at symmetrical positions with respect to the center line C. There is.

These positive pressure generating parts 2.3 are connected to tapered parts 2a and 3a of an air receiver provided on the air inflow side (front side) and this tapered part 2a.
, 3a, which are flush with each other, and a magnetic head element 6 is embedded in the rear end of one of the rails 2b.

In the above configuration, the slider body I is in contact with the disk 5 when the disk 5 is stopped. When the disk 5 rotates, an air flow is generated near the surface of the disk 5 that moves together with the disk 5. When this air flow reaches a certain speed or higher, each taper FIB2a.

The air flow pressurized at 3a flows below the rail portions 2b, 3b, creating a positive pressure state below the rail portions 2b, 3b, and the slider body 1 floats against the elastic force of the support arm IO. The slider body is a support arm! Left and right after correction for 0?
Since it is swingable, it assumes a floating attitude based on the positive pressure distribution below the rail portions 2b and 3b.

However, although the floating blade is obtained by the pair of rail parts 2b and 3b, the width of the pair of rail parts 2b and 3b is all the same from the front end to the rear end as shown in FIG. , 3b, if we take into account that the air flow is pressurized as it goes rearward, it increases as it goes rearward. It takes a so-called floating posture with a small pitch angle (β).

If the pitch angle (β) of the levitation posture is small, the levitation will not be stable and problems will arise in dynamic performance, etc.

Also, as shown by the arrow Y in FIG. 6, the innermost track T
If the disk is displaced from the i position to the outer circumferential side, the disk rotation direction has a skew angle θ with respect to the direction of the center line C of the slider body 1. With the skew angle θ, the airflow outflow side of the upstream rail portion 2b becomes the inner surface, and the airflow outflow side of the downstream rail portion 3b becomes the outer surface. As shown in Fig. 1θ, the pressure below the rail portions 2b, 3b is in a pressure distribution state where the highest pressure is near the airflow outflow side.
The rolling moment M (pressure x distance to the rotational fulcrum p) around the rotational fulcrum p of the slider body l is due to the pressure of the downstream rail portion 3b, and the rolling moment M acts in the direction of the arrow in Fig. 10. . Then, the slider body 1 rolls (tilts) due to this rolling moment M. Since the skew angle θ is maximum at the 10th position of the outermost track, the amount of rolling is maximum at the 10th position of the outermost track. When rolling occurs in this way, one rail portion 2b comes closer to the disk 5 than necessary, which may cause the rail portion 2b to come into contact with the disk 5 or cause the electromagnetic conversion characteristics to deteriorate due to the tilt of the magnetic head element 6. A problem arises.

[Problems to be Solved by the Invention] In order to solve the former problem, a slider body 1 shown in FIG. 11 has been proposed (see Japanese Patent Laid-Open No. 6123148+). This slider body I has a pair of left and right rail portions 2b,
3b is configured to have a wide width that gradually increases inward from the rear toward the front (air inflow side). According to this slider body 1, the front areas of the rail portions 2b and 3b are wider than the rear areas, and a large floating blade can be obtained, so that a floating posture with a large pitch angle (β) can be obtained.

However, at a position where the disk rotation direction has a skew angle (θ) with respect to the centerline C direction of the slider body 1, the airflow outflow side of the upstream rail portion 2b becomes the inner surface as described above, and the airflow of the downstream rail portion 3b becomes the inner surface. Since the outflow side is the outer surface, the rolling moment M on the downstream rail portion 3b side is strong, and since the downstream rail portion 3b is oriented along the airflow, the airflow compressed at the tapered portion 3a is smaller than that on the upstream rail portion 2b. A large amount is held below the rail portion 3b, and the rolling moment M on the downstream rail portion 3b side is enhanced. Therefore, a larger rolling (inclination) occurs than in the slider body l where the widths of the rail portions 2b and 3b are uniform.

In addition, in order to solve the latter problem, the present applicant previously proposed a slider body 1 shown in FIG.
(See application documents No. 820). The slider body 1 is configured to have a wide pair of left and right rail portions 2b, 3b whose width gradually increases inward from the front toward the rear.

According to this slider body 1, the center line C of the slider body I
At a position where the disk rotation direction has a skew angle (θ) with respect to the direction, the air flow outflow side of the upstream rail portion 2b becomes the inner surface, and the air flow outflow side of the downstream rail portion 3b becomes the outer surface, and the air flow outflow side of the downstream rail portion 3b becomes the outer surface. The rolling moment M becomes stronger, but because the upstream rail section 2b is wide and extends inward in the direction along the airflow, the airflow compressed at the tapered section 2a is larger than the downstream rail section 3b. 2
b Since it is held downward, this positive pressure acts on a moment in the direction of canceling the rolling moment, suppressing the occurrence of rolling (tilting). However, since the width of the rail portions 2b and 3b of this slider body l is narrow on the front side, the rail portion 2b.

Pitch angle (β) for slider body 1 or more with uniform width of 3b
This results in a small floating posture.

Therefore, an object of the present invention is to provide a head slider device that can maintain a large pitch angle and prevent rolling (tilting) as much as possible even in a position with a skew angle and obtain a stable flying state. Take it as a challenge.

[Means for Solving the Problems] In order to solve the above problems, the Herad slider device of the present invention rotatably supports the proximal end side of a support arm, and a slider body is mounted at the tip of the support arm in at least the front, back, left and right directions. In the head slider device, the slider body is rotatably supported by the support arm, and the slider body is movable in the radial direction of the disk by rotation of the support arm. A positive pressure generating section is provided, and each positive pressure generating section is composed of a tapered part of an air receiver provided on the air inflow side and a flush rail part following this tapered part, and of the pair of rail parts, the The side where the disk rotation direction line has a skew angle with respect to the center line is configured to have a wide width that gradually increases outward from the rear toward the front.

[Function] Since the front side of the pair of rails is wide, the front side receives a larger floating blade from the airflow than the rear side, so it assumes a floating posture with a large pitch angle, and when the slider body is located at a position with a skew angle. , the airflow outflow side of each rail section where high pressure distribution occurs is the inner surface of the upstream rail section and the outer surface of the downstream rail section, so that the downstream rail section rises and the upstream rail section sinks. / Gumo ~ Menoto works, but L? 11.The Knoll part of # is compressed at the taper part of the wide jaw which spreads outward, and the airflow is compressed by the taper part of F16f. The rail portion 1 and the car J are held in large quantities, and due to this positive tI jy, a moment acting in the direction to offset the rolling moment acts (5) and the occurrence of nearing (tilting) is caused in the push 2. 3. [Examples] Examples of the present invention will be described below with reference to the drawings.

Embodiments of the present invention are shown in FIGS. 1 to 5.
, the Heratothrive device of this example is compared with the multilayer conventional example 1
The configuration of the slider body I is the same except for the configuration of the slider body I.The details of the configuration other than the slider body I are omitted. A slider body 1 is attached to the slider body 1 so as to be swingable back and forth, left and right, and this slider body I is shown in FIGS. 1 and 2.

In FIGS. 1 and 2, on the disk facing surface of the slider body 1, there are 11 located symmetrically with respect to the center line C.
．． Pressure setting] 15 part 2.3 is protruding, At1, 1.: -χ, 1 of IY month departure 44 part 1, between 3 and j, air circulation line 4 is configured t + I' - 5, each positive pressure generating section 2.
'A is the front end side teal section 2a, which is the air inflow side.
The 3, -i and - bar parts 2a and 3a are made up of the rear 1. ' - Gradually taper closer to the J Dista 5 side,
It is configured to receive the air flow when the disk rotates five times. 1 No. 1 part 2b, 3b continues from the rear end of child part 2a, 3a and has a disc P75, which is approximately in line with the rear end of 1, 2 sword part 15 part 2b. is a magnetic element F
6 is buried with only the tip exposed. 1. Also, do the L/L portions 2b and 3b go from the rear to the front? Therefore, it has a wide structure that gradually expands outward.

Hereinafter, one effect of the structure I= will be explained.

When the disk 5 is stopped, the slider 3 is in contact with the surface of the disk 5 due to a weak elastic force from the slider body I or the support arm.
When the disk 5 rotates simultaneously, an air flow is generated near the disk 5 that moves as the disk 5 moves (the air flow of the lever hits the tapered portions 2a, 3a of the slider body 1). When the rotation speed of the disk 5 increases and the airflow reaches a certain speed or higher, the pressurized airflow hits the tapered portions 2a and 3a and flows toward the rails 2b and abT.Then, the rail portions 2b and 3b''1" side becomes a positive pressure state and floats against the elastic force of the slider body 1 or the support arm [2, floating -)::
-1: Since the slider main body l is swingable back and forth and left and right with respect to the support arm, it assumes a floating-L attitude depending on the positive pressure distribution state below the rail portions 2b and 3b.

Here, since the zero side of the pair of rail portions 2b and 3b is wider than the rear side, the front side receives a larger floating force due to the air flow than the rear side, so that a floating posture with a large bit angle (β) is taken.

Further, when the slider body 1 is located on the innermost track Ti, the disk rotation direction line coincides with the center line C of the slider body 1. Then, the lower portions of the left and right rail portions 2b and 3b are in a similar positive pressure distribution state, so that the slider body 1 does not tilt to either side and has the same floating amount on the left and right sides.

j-, when the slider body 1 is displaced 4- in the outer circumferential direction from the innermost track Tj, the center tlfic of the slider body
The disc rotation direction line has a Schiko angle θ with respect to the disc rotation direction. At a position where the skew angle θ exists, the air flow pressurized at the tapered portion 2a flows out from the inner surface of the upstream rail portion 2b, and the air flow pressurized at the tapered portion 3a flows out from the downstream rail portion 3b. The flow flows out from the outer surface. Then, the airflow outflow side with high pressure distribution is the rail part 2b of -L flow.
In this case, the rotation fulcrum p is at a short distance, and the downstream rail section 3b is at a long distance from the rotation fulcrum p, and the downstream rail section 3b is floating 1
- A rolling moment acts in a direction in which the upstream rail portion 2b sinks. On the other hand, the upstream rail section 2b has a wide width that spreads outward in the direction along the airflow, while the -upstream rail section 3b has a wide angle with the airflow, so the upstream rail section 2b has a tapered shape. A larger amount of pressurized airflow is retained in the portion 2a than in the downstream rail portion 3b. Due to the positive pressure of this pressurized air, a moment in the direction of canceling the rolling moment is generated in the slider body 1. (/
')View-F Press the link (tilt) angle as much as possible 5, and-
'31 kilos.

(Figure 1 shows - and + t for each magnification of front width and rear width.
3. The various dimensions shown in FIGS. 1 and 2 are 1. , == 2540μ
m, D=2032μr11. a 1320.8 μm, ■
)-254μm, e=300μIn, α=0.85'
The disk running speed V is 17 m/s, and the skew angle θ is
2 (bi, load weight 9,5 g 2. Under these conditions, compare the U-ring angle when the front width X of the rail portion 211.3b is expanded inward and when it is expanded outward. It can be seen that when expanding inward, the rolling angle increases by -4, but when expanding outward IJ, the rolling angle decreases.

Figure 4 shows various magnifications (X /
The rolling angle when changing e) is shown first, and under the above conditions, an expansion of about 1.3 times is most preferable. , No.) Figure 11 shows various magnifications (X
/c) is shown, and if the magnification is high < t, it is proportional to 1;
It can be seen that =, the z completion angle (β:) decreases by 4, -. -7
・The ring angle is about 13 times as wide as d.
O + B 0 0083 The bitge angle (β) of the reed culm degree is obtained. 1. In this embodiment, the odor is -71 F), and both of the round portions 2b and 3b are configured to be wide, or the center line C (in contrast, the disk rotation direction line has a S2A-knee angle O). 1) - IK 2 b on the A side is configured to be wide, and
good.

2nd stake 1, only one side is wide 1, center line C when configuring '8
)" At the position where the isk rotation direction lines match 4, the left and right rail sections 21-+ and 3b are in a positive pressure state, so the rails roll (tilt) slightly. However, the tapered sections 2a and 3a are pressurized. If the amount of air flowing in is the same, the nearing angle at ] will be very small.

[Effects of the invention] Below 1. As described above, according to the present invention, the slider body is attached to the tip of the support armour, and by rotating the support armour, the slider body is moved in the radial direction of the disk. In the device, rf
In the slider body facing the disk, 11F-pressure generating portions are provided at symmetrical positions with respect to the center line, respectively.
Each of these positive pressure generating parts is composed of a tapered part of the air volume (, ) provided on the air inflow side and a rail part flush with the larva part of ζ' L2, of which the center line of the pair of rail parts is versus j
7. The side where the disc rotation direction line has a skew angle is configured to have a wide width that gradually expands outward as it goes from the rear to the front C1-), so that the front side of the pair of rails is wide. The wide front side receives a large force from the airflow from the rear side, and the upstream rail part spreads outward at a position with a Sunny angle, resulting in a tapered part. A large amount of airflow compressed by the L/L part is retained compared to the downstream L/L part, and the pitch angle is kept larger than before, making it stable with less rolling (tilting). However, a floating state can be obtained, there is no risk of contact with the disk, and there are effects such as improved electromagnetic conversion characteristics.

Furthermore, when applied to a device as in the embodiment, in which the slider body is positioned in contact with the disk when the disk is stopped, and is floated by the air flow caused by the rotation of the disk, the width of the conventional 1-knoll portion may be reduced. Uniform one (J has a low rotation speed and smoothness compared to J) (6: It also has the effect of floating.

[Brief explanation of the drawing]

1 to 5 show embodiments of the present invention, and FIG. 1 (J
Figure 2 is a bottom view of the slider body as seen from the bottom side, Figure 3 is a characteristic curve of the lorry and /g angles in the case of [-] and -, and Figure 4 is the bottom view of the slider body. Magnification to 4″
FIG. 5 is a characteristic diagram of the pitch angle for each magnification, and FIGS. 6 to 12 show conventional examples. Figure 7 is a perspective view of the slider body seen from the bottom side;
FIG. 8 is a side view of the slider body, FIG. 9 is a bottom view of the slider body, FIG. FIG. 12 is a bottom view of still another slider body. 1. Slider body, 2.3.-Positive pressure generation part, 2 a
. 3a taper part, 2b. 3b...Rail part, 5. Ice disk, 0... Support arm. Head slider 4 (! piece 1 piece) l Bottom view (4 branches) Figure 6 Slider end of 1 sliver round (JL plan) Figure 10 Slater 4ri body area 1j side view Figure 8 De Figure 11

Claims (1)

[Claims] (1) The proximal end side of a support arm is rotatably supported, a slider body is rotatably supported at the tip of the support arm in at least the front, back, left and right directions, and the slider body is moved in the radial direction of the disk by rotation of the support arm. In the head slider device, the slider body is provided with positive pressure generating portions at symmetrical positions on the disk facing surface of the slider body, and each of the positive pressure generating portions is provided on the air inflow side. Consisting of a tapered part of the air receiver and a flush rail part following the tapered part, the side of the pair of rail parts where the disk rotation direction line has a skew angle with respect to the center line faces from the rear to the front. A head slider device characterized in that the width gradually expands outward according to the width of the head slider device.