JPH0757417A - Information recording/reproducing device - Google Patents

Abstract

PURPOSE:To suppress the occurrence of a warp attending upon shrinkage of an adhesive or temp. change and hence to improve the reliability by applying the adhesive also to the back surface of the surface stuck to a holding body of a slider. CONSTITUTION:The upper surface 20a of the slider 20 is coated with the adhesive 22, and is stuck to a flexture 21 to be fixed up. Then, the adhesive 22 is also applied in a recessed groove 23 formed on the lower surface 20b of the slider 20. Thus, by applying the adhesive 22 to both surfaces 20a and 20b of the slider 20, the shrinkage of the adhesive 22 on both surfaces 20a and 20b takes place almost equally. Consequently, the shrinkage force of the adhesive 22 is offset by both surfaces of the slider 20, so that the occurrence of a warp of the slider 20 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus for recording and / or reproducing information by disposing a floating slider on the surface of a recording medium, and more particularly to preventing the slider from warping. The present invention relates to a characteristic information recording / reproducing apparatus.

[0002]

2. Description of the Related Art There are various types of disk drive devices for recording and / or reproducing information by rotationally driving an information recording medium, for example, a magnetic recording medium (hereinafter referred to as a magnetic disk) formed on a disk. Among them, disk drives, which are also called hard disk drives, are often used, especially for those that are small and require a lot of information.

FIG. 6 is a plan view showing the overall structure of a conventional information recording / reproducing apparatus, and FIG. 7 is an explanatory view showing the essential structure of the conventional information recording / reproducing apparatus. As shown in these figures,
The disk drive device 1 includes a chassis 2 and the chassis 2
A frame (not shown) for holding and mounting on the main body device, a hard disk 3 rotatably supported on the chassis 2,
A magnetic head 4 for writing and reading signals to and from the magnetic recording layer of the hard disk 3, a slider 5 integrally provided with the magnetic head 4, and a slider 5 mounted on one end side via a support spring (flexure) 6 In addition, a movable coil 7 is attached to the other end side, and the movable coil 7 is provided between a swing arm (load beam) 9 as a supporting member rotatably supported by a support shaft 8 and a pair of upper and lower yokes 10 and 11. A voice coil motor 12 as a magnetic head transfer motor, a lid (not shown) for sealing each member mounted on the upper surface side of the chassis 2, and a drive control circuit mounted on the lower surface side of the chassis 2. It is mainly composed of a printed wiring board (not shown).

[0004]

By the way, in the conventional information recording / reproducing apparatus, as shown in FIG. 7, a slider 5 provided with a signal converter (R / W gap) constituting the magnetic head 4 is provided. The anti-signal conversion portion surface 5a was adhered and fixed to the flexure 6 serving as a holder with the adhesive 13. However, according to the adhesive fixing means, the slider 5 may be warped due to the contraction of the adhesive 13 when the adhesive 13 dries. Further, due to the difference in the coefficient of thermal expansion between the flexure 6, slider 5 and adhesive 13, the slider 5 may warp (shown by the solid line in FIG. 6) due to temperature changes. That is, in the conventional information recording / reproducing apparatus, the coefficient of thermal expansion of these materials is, for example, 100 to 300 ° C.
When 304 is used, it is 17.3 × 10 to ⁶ 1 / ° C., for a slider made of ferrite it is 11.5 × 10 to ⁶ 1 / ° C., and for an ultraviolet curable adhesive it is 16 × 10 to ⁶ 1 / ° C. As described above, since there is a difference in the coefficient of thermal expansion between the flexure 6, the slider 5, and the adhesive 13, the amount of contraction (or expansion) of each member differs due to temperature changes, and the slider 5 warps. When a warp occurs on the surface of the slider 5 facing the recording medium in this way, the R /
There is a problem in that the distance ΔFH between the W gap portion and the recording surface of the recording medium changes, the read or write level of the signal changes, leading to an error.

An object of the present invention is to provide an information recording / reproducing device capable of reading and writing highly reliable information even when the temperature changes.

[0006]

The object is to provide a slider having a signal converter for recording or reproducing on a recording medium, and a holder for holding the slider on the information recording surface side of the recording medium. In an information recording / reproducing apparatus having a rotation driving unit for the recording medium and a transfer unit for moving the signal conversion unit along the information recording surface of the recording medium, the slider and the holding body are provided with opposite surfaces. This is achieved by the first means in which the slider is adhered and fixed as an adhesive surface and an adhesive is applied to the back surface of the slider with the adhesive surface or the back surface of the holding body with the adhesive surface. The object is a slider having a signal conversion unit for performing recording or reproduction on a recording medium, and a holder for holding the slider on the information recording surface side of the recording medium,
In an information recording / reproducing apparatus having a rotation driving unit for the recording medium and a transfer unit for moving the signal conversion unit along the information recording surface of the recording medium, the side surface of the slider is bonded to the holder. This is achieved by the second means in which the slider is fixed to the holding body. The purpose is
A slider having a signal converter for recording or reproducing on a recording medium, a holder for holding the slider on the information recording surface side of the recording medium, a rotation driving means for the recording medium, and the signal converter. In the information recording / reproducing apparatus having a transfer means for transferring the recording medium along the information recording surface of the recording medium, a third means in which the side surface of the slider is held by the holding body is achieved. The above object can be achieved by the fourth means in the second means or the third means, wherein the fixing of the slider of the holding body or the sandwiching of the slider is carried out on a surface that passes through substantially the center of gravity of the slider. To be done. The object is a slider having a signal conversion unit for performing recording or reproduction on a recording medium, a holder for holding the slider on the information recording surface side of the recording medium, and a rotation driving unit for the recording medium, In the information recording / reproducing apparatus having a transfer means for transferring the signal conversion unit along the information recording surface of the recording medium, the slider is provided with a notch portion for dividing a surface along the information recording surface of the recording medium. This is achieved by a fifth means in which the signal conversion portion is provided on one end side of the slider, and the holding body is adhesively fixed to the other end side of the slider with the cutout portion interposed.

[0007]

According to the first aspect of the present invention, since the adhesive is adhered to both surfaces of the slider or the holding body, the contraction of the adhesive occurs substantially evenly on both sides, the contracting force is offset on both sides, and warpage occurs. Is suppressed, and even if the ambient temperature changes during device operation, the distance between the recording surface of the recording medium and the signal conversion unit of the information recording / reproducing device does not change, so highly reliable information reading / writing is possible. An information recording / reproducing apparatus can be provided.

According to the second aspect of the present invention, since the side surface of the slider is fixed to the holder by adhering the side surface of the slider to the holder, the adhesive is not applied to the surface of the slider parallel to the recording surface of the recording medium. The warp does not occur on the surface of the slider facing the recording medium. Further, since no member such as a flexure is arranged on the upper surface of the slider, the device can be thinned by the thickness of the holder.

According to the invention of claim 3, in addition to the effect of claim 2, since no adhesive is used, assembly is easy, and unintended adhesion of adhesive occurs to other members. In addition, since it is not necessary to maintain the alignment of the members with each other until the adhesive is cured, the working time can be shortened.

According to the fourth aspect of the present invention, the posture of the slider can be balanced by making the center of gravity of the slider substantially coincide with the holding position of the holder. Accordingly, when the slider is moved to a desired position on the recording surface of the recording medium, the inclination of the slider in the roll direction can be suppressed, and the level of the read or write signal is not adversely affected.

According to the fifth aspect of the present invention, even if a warp occurs on the side of the bonded portion with the holding body, the warp is blocked by the notch and the warp does not occur at the portion where the signal conversion section is provided.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. Next, a first embodiment of the present invention will be described.
1A and 1B are a longitudinal sectional view and a front view showing a first embodiment of an information recording / reproducing apparatus according to the present invention. Figure 1
In (a) and (b), 20 is a slider, 21 is a flexure, and 22 is an adhesive. A signal converter (R / W gap) 36 is formed on the surface of the slider 20 facing the recording surface of the recording medium, and the upper surface 2 of the slider 20 is formed.
0a, as shown in FIGS. 1 (a) and 1 (b), the adhesive 2
2 is applied and the flexure 21 is adhesively fixed. Further, a concave groove 23 is formed on the lower surface 20b of the slider 20, and an adhesive 22 is applied to the concave groove 23. In this way, the adhesive 22 is applied to both sides 20 of the slider 20.
By applying to the a and 20b, the contraction of the adhesive 22 occurs substantially evenly on both surfaces 20a and 20b of the slider 20. Therefore, the shrinkage force of the adhesive 22 is
Since both sides 20a and 20b of the slider 20 are offset by each other and the contracting force of the adhesive 22 does not act on the slider 20, warpage of the slider 20 can be prevented.

Further, the flexure 21 and the slider 20
Even if there is a difference in the coefficient of thermal expansion between the adhesive 22 and the adhesive 22, the expansion and contraction force of the adhesive 22 due to the temperature change will be
Since the contraction force of the adhesive 22 does not act on the slider 20 because of the offset by 0a and 20b, it is possible to prevent the warp of the slider 20 due to the contraction of the adhesive 22 due to the temperature change.

Next, a second embodiment of the present invention will be described. FIG. 2 is a front view showing a second embodiment of the information recording / reproducing apparatus according to the present invention. A signal converter (R / W gap) is provided on the surface of the slider 20 facing the recording surface of the recording medium.
As shown in FIG. 2, an adhesive 22 is applied to the upper surface 20a of the slider 20 and the lower surface 21b of the flexure 21 is adhesively fixed. Also,
An adhesive 22 is applied to the upper surface 21 a of the flexure 21. By applying the adhesive 22 to both surfaces 21a and 21b of the flexure 21 in this manner, the adhesive 22
Shrinkage occurs substantially evenly on both surfaces 21a, 21b of the flexure 21. Therefore, the contracting force of the adhesive 22 is canceled by the both surfaces 21a, 21b of the flexure 21, and the contracting force of the adhesive 22 does not act on the slider 20, so that the slider 20 can be prevented from warping.

Further, the flexure 21 and the slider 20
Even if there is a difference in the coefficient of thermal expansion between the adhesive 22 and the adhesive 22, the elastic force of the adhesive 22 due to the temperature change is canceled by the two surfaces 21a and 21b of the flexure 21, and the elastic force of the adhesive 22 does not act on the slider 20. Therefore, the warp of the slider 20 due to the contraction of the adhesive 22 due to the temperature change can be prevented.

Next, a third embodiment of the present invention will be described. 3 (a) and 3 (b) are a plan view and a vertical sectional view showing a third embodiment of the information recording / reproducing apparatus according to the present invention. In FIGS. 3A and 3B, 24 is a flexure and 25 is a slider. On the rail 37 of the slider 25, a signal converter (R / W gap) (not shown) is formed at one end of the rail 37 with respect to the recording surface of the recording medium. The flexure 24 has slits 26, 26 notched in a rectangular frame shape leaving a pair of connecting portions, a rectangular opening 27 opened in the slits 26, 26, and opposing sides of the opening 27. And a slider fixing piece portion 28, which is bent from the above portion in an L shape. The slider 25 is fitted between the slider fixing pieces 28, 28,
Both side surfaces 25a, 25a are adhered to the slider fixing pieces 28, 28 with an adhesive 22, respectively, and the slider 25 is fixed to the flexure 24. In addition, FIG.
As shown in, the center of gravity G of the slider 25 and the holding position of the flexure 24 are fixed so as to substantially coincide with each other. Thereby, the posture of the slider 25 can be balanced.

In this way, both side surfaces 25 of the slider 25 are
Since the adhesive 25 is affixed to the flexure 24 with a and 25a, the adhesive 22 is not applied to the surface (for example, the upper surface) parallel to the recording surface of the recording medium of the slider 25, so the recording medium of the slider 25 is contracted by the adhesive 22. No warpage occurs on the surface facing to. Also in the case of this embodiment, the contracting force of the adhesive 22 acts so as to cancel out, and the adhesive 22
Even if the contracting force is applied, it is in the surface direction of the slider 25, so that the slider 25 hardly warps. Further, since no member such as the flexure 24 is arranged on the upper surface of the slider 25, the device can be thinned by the thickness of the flexure 24. Further, since the center of gravity G of the slider 25 and the holding position of the flexure 24 are substantially aligned with each other, the posture of the slider 25 can be balanced.
When the slider 25 is transferred to a desired position on the recording surface of the recording medium, a roll direction generated on the slider 25 (see FIG.
The inclination in the direction of the arrow (b) can be suppressed, and the level of the read or write signal is not adversely affected.

Next, a fourth embodiment of the present invention will be described. FIG. 4 is an explanatory diagram showing a fourth embodiment of the information recording / reproducing apparatus according to the present invention. In the fourth embodiment, as shown in FIG. 4, the side portions 29A, 29A of the slider 29 are
Is fixed by caulking with a flexure 30. Specifically, one end of the flexure 30 has a U-shaped notch or a rectangular opening, which is a caulking portion 31, 31.
And the slider 2 is formed between the crimped portions 31, 31.
9 is fitted and the caulking portions 31, 31 facing the side portions 29A, 29A of the slider 29 are pressed toward the side portions 29A, 29A of the slider 29, and caulked as shown in FIG. Fix it. Also, as shown in FIG.
The center of gravity G of the slider 29 and the holding position of the flexure 30 are caulked so as to substantially coincide with each other. Thereby, the posture of the slider 29 can be balanced.

At one end of the rail 37 of the slider 29, a signal conversion unit (R / R) (not shown) for the recording surface of the recording medium is provided.
W gap) is formed. In the fourth embodiment as described above, in addition to the effects of the third embodiment, no adhesive is used, so that the assembly is easy, and unintended adhesion of the adhesive to other members occurs. In addition, since it is not necessary to maintain the alignment of the members with each other until the adhesive is cured, the working time can be shortened.

Next, a fifth embodiment of the present invention will be described. FIG. 5 is a plan view showing a fifth embodiment of the information recording / reproducing apparatus according to the present invention. In FIG. 5, reference numeral 32 denotes a slider, and the slider 32 is provided with a cutout portion 33 that divides a surface along a recording surface of a recording medium, and one end side, that is, the cutout portion, which faces the cutout portion 33. A signal conversion unit (R / W gap) 34 is provided on one side 32a of the slider 32 with the portion 33 as a boundary, and the slider is separated with the other end side facing through the notch 33, that is, the notch 33 as a boundary. A flexure 35 is arranged on the upper surface of the other side 32 b of 32, and is fixed by an adhesive 22. In such a fifth embodiment,
The slider 32 is provided with a cutout portion 33 that divides a surface along the recording surface of the recording medium, the signal conversion portion 34 is provided on one end side (32a) facing the cutout portion 33, and the other end side of the slider 32 ( 32b) is bonded and fixed to the flexure 35, the signal converter 34 and the bond to the flexure 35 (adhesive 22) are divided by the notch 33, and therefore the bond to the slider 32 (adhesive 22). Even if there is a warp on the other end side (32b), the warp is blocked by the notch 33, and no warp occurs on the one end side (32a) of the slider 32 where the signal conversion unit 34 is provided.

[0021]

According to the invention as set forth in claim 1, the contraction of the adhesive occurs substantially evenly on both sides, the contraction force is offset on both sides, the occurrence of warpage is suppressed, and the temperature of the surroundings during operation of the apparatus is reduced. Even if the change occurs, the distance between the recording surface of the recording medium and the signal conversion unit of the information recording / reproducing apparatus does not change, so that it is possible to provide an information recording / reproducing apparatus capable of reading and writing highly reliable information. .

According to the second aspect of the present invention, since the adhesive is not applied to the surface of the slider which is parallel to the recording surface of the recording medium, the surface of the slider facing the recording medium does not warp. Further, since no member such as a flexure is arranged on the upper surface of the slider, the device can be thinned by the thickness of the holder.

According to the invention of claim 3, in addition to the effect of claim 2, since no adhesive is used, assembly is easy, and unintended adhesion of adhesive occurs to other members. In addition, since it is not necessary to maintain the alignment of the members with each other until the adhesive is cured, the working time can be shortened.

According to the fourth aspect of the present invention, the posture of the slider can be balanced by making the center of gravity of the slider substantially coincide with the holding position of the holder. Thus, when the slider is moved to a desired position on the recording surface of the recording medium, the inclination of the slider in the roll direction can be suppressed, and the read or write signal level is not adversely affected.

According to the fifth aspect of the present invention, even if a warp occurs on the side of the bonded portion with the holding body, the warp is blocked by the notch and the warp does not occur at the portion where the signal conversion section is provided.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of an information recording / reproducing apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a second embodiment of the information recording / reproducing apparatus according to the present invention.

FIG. 3 is an explanatory diagram showing a third embodiment of the information recording / reproducing apparatus according to the present invention.

FIG. 4 is an explanatory diagram showing a fourth embodiment of the information recording / reproducing apparatus according to the present invention.

FIG. 5 is an explanatory diagram showing a fifth embodiment of the information recording / reproducing apparatus according to the present invention.

FIG. 6 is a plan view showing the overall configuration of a conventional information recording / reproducing apparatus.

FIG. 7 is an explanatory diagram showing a main configuration of a conventional information recording / reproducing apparatus.

[Explanation of symbols]

 20, 25, 29, 32 slider 20a upper surface of slider 20 20b lower surface of slider 20, 21, 24, 30, 35 flexure 21a upper surface of flexure 21 21b lower surface of flexure 21 22 adhesive 23 concave groove 25a side surface of slider 25 26 slit 27 Opening 28 Slider fixing piece 29A Side of slider 29 31 Caulking 32a One side of slider 32 32b Another side of slider 32 33 Cutout 34, 36 Signal converter (R / W gap) G Center of gravity of slider 25 position

Claims (5)

[Claims] 1. A slider having a signal conversion unit for performing recording or reproduction on a recording medium, a holder for holding the slider on the information recording surface side of the recording medium, and a rotation driving means for the recording medium. An information recording / reproducing apparatus having a transfer means for transferring the signal conversion unit along an information recording surface of the recording medium, wherein the slider and the holding body are bonded and fixed with respective facing surfaces as adhesive surfaces, An information recording / reproducing apparatus characterized in that an adhesive is applied to the back surface of the slider to the adhesive surface or the back surface of the holding body to the adhesive surface. 2. A slider having a signal conversion unit for recording or reproducing on a recording medium, a holder for holding the slider on the information recording surface side of the recording medium, and a rotation driving means for the recording medium. An information recording / reproducing apparatus having a transfer means for transferring the signal conversion unit along an information recording surface of the recording medium, wherein a side surface of the slider is bonded to the holding body to fix the slider to the holding body. An information recording / reproducing device characterized in that 3. A slider having a signal converter for recording or reproducing on a recording medium, a holder for holding the slider on the information recording surface side of the recording medium, and a rotation driving means for the recording medium. An information recording / reproducing apparatus having a transfer means for transferring the signal conversion unit along an information recording surface of the recording medium, wherein the side surface of the slider is sandwiched between the holding bodies. apparatus. 4. The information recording / reproducing apparatus according to claim 2 or 3, characterized in that the slider is fixedly adhered or pinched between the holders on a surface that passes through substantially the center of gravity of the slider. An information recording / reproducing device. 5. A slider having a signal conversion unit for performing recording or reproduction on a recording medium, a holder for holding the slider on the information recording surface side of the recording medium, and a rotation driving means for the recording medium. An information recording / reproducing apparatus having a transfer means for transferring the signal conversion unit along an information recording surface of the recording medium, wherein the slider has a notch portion for dividing a surface along the information recording surface of the recording medium. An information recording / reproducing apparatus, wherein the signal conversion unit is provided on one end side of the slider, and the holding body is adhesively fixed to the other end side of the slider with the cutout portion interposed.