JPH04285777A - Floating type head and its assembly and adjusting method - Google Patents

Abstract

PURPOSE:To hardly allow a floating type magnetic head to contact with a magneto-optical disk and to hardly cause a flaw and adsorption, etc., by lifting and lowering the floating type magnetic head under the rotating state of the magneto-optical disk and to still more hardly allow the contact with a magneto- optical disk by lifting and lowering the head keeping in approximately parallel posture. CONSTITUTION:The floating type magnetic head 5 consisting of a magnetic head main body fitted to a slider, for performing the recording under floating off the surface of the magneto-optical disk 1 in accordance with the rotation of the magneto-optical disk 1 is equipped with lifting and lowering members 13 and 14 for lifting and lowering the floating type magnetic head 5 as against the magneto-optical disk 1 under the rotation state of the magneto-optical disk 1. These lifting and lowering members 13 and 14 are desirable to lift and lower the floating type magnetic head 5 in order to make the floating type magnetic head 5 with its surface opposite to the surface of the magneto-optical disk 1 approximately parallel to the surface of the magneto-optical disk 1.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various types of floating heads such as floating magnetic heads and floating optical heads in magneto-optical disk drives, and methods for assembling and adjusting the same.

0002

2. Description of the Related Art In recent years, magneto-optical disks have been developed as optical memory devices capable of recording, reproducing and erasing information. A magneto-optical disk uses a perpendicularly magnetized film whose magnetization direction is perpendicular to the film surface as a recording medium.The perpendicularly magnetized film is heated by laser beam irradiation to reduce its coercive force, and then an external magnetic field is applied to the perpendicularly magnetized film. By applying the magnetic field, the direction of magnetization is made to match the direction of the external magnetic field, and information is recorded.

[0003] Recording methods for magneto-optical disks include an optical modulation method in which the intensity of laser light is modulated according to the information to be recorded while continuously applying an external magnetic field in a fixed direction, and a light modulation method in which the intensity of laser light is modulated according to the information to be recorded. It is broadly classified into a magnetic field modulation method, which reverses the direction of the external magnetic field depending on the information to be recorded.

By the way, when rewriting recorded information, the magnetic field modulation method is seen as a promising method for realizing so-called overwriting, in which new information is directly recorded over the old information without going through the process of erasing the old information. ing. In this case, in order to increase the switching speed of the direction of the external magnetic field and improve the transfer rate, it is necessary to reduce the inductance of the magnetic head, but this will reduce the magnetic field strength, so the magnetic head It must be placed as close to the magnetic disk as possible.

However, as a substrate for a magneto-optical disk,
Particularly when using a resin such as polycarbonate, the surface of the substrate has considerable surface runout, that is, unevenness in the circumferential direction. If the magnetic head is brought too close to the magneto-optical disk, the magnetic head will be affected by the surface runout. The head may come into contact with the magneto-optical disk, causing damage to the magnetic head or the magneto-optical disk. Therefore, it is necessary to leave a certain distance between the magnetic head and the magneto-optical disk.
There was a problem that the magnetic field strength tended to be insufficient. Furthermore, as the distance between the magnetic head and the perpendicularly magnetized film changes due to surface runout, the magnetic field strength tends to change.

[0006] Therefore, a floating magnetic head, which is used in magnetic disks, etc., is adopted, and the magnetic head is biased toward one surface of the magneto-optical disk by a suspension made of a leaf spring, etc. When stopped, the floating magnetic head is brought into contact with the disk surface, and as the magneto-optical disk rotates, the floating magnetic head is made to follow the surface deflection while keeping a nearly constant minute distance between it and the magneto-optical disk to perform recording. is possible. On the other hand, in order to make the optical head smaller, lighter, and more integrated, it is also being considered to form it as a floating head and float it above the disk.

[0007]

[Problems to be Solved by the Invention] However, when using a floating head as described above, the floating head is forced into contact with the disk surface from a stopped state in the same manner as a magnetic disk, and the disk rotates. The so-called CSS (Contact
When using the Start and Stop (Start and Stop) method, not only is there a risk that the disk and floating head may be worn out or damaged due to the repetition of this CSS, but also the disk and floating head may attract each other, causing the spindle motor to rotate the disk. There were problems such as not being able to do so.

These problems become even more serious when a floating head is used for a disk cartridge of the ISO standard, which is being defined without assuming the use of a floating head.

[0009]

[Means for Solving the Problems] In order to solve the above-mentioned problem, a floating head according to claim 1 has an information recording source attached to a slider, and floats from the surface of the recording medium as the recording medium is driven. A floating head that performs recording while recording is characterized by comprising an elevating member that raises and lowers the floating head with respect to the recording medium while the recording medium is being driven.

[0010] In addition to the structure of claim 1, the floating head according to a second aspect of the present invention is characterized in that the elevating member moves the floating head so that the surface of the floating head facing the surface of the recording medium is connected to the recording medium. It is characterized by being configured to move up and down almost parallel to the surface.

[0011] A floating head according to claim 3 is a floating head according to claim 1.
Or, in addition to the configuration of 2, a suspension member is provided with one end fixed to a fixed part and the other end supporting the floating head, and the elevating member moves up and down while contacting the suspension member to elastically move the suspension member. The device is characterized in that it is configured so that the floating head can be moved up and down by being deformed.

A method for assembling and adjusting a floating head according to a fourth aspect of the present invention is a method for assembling and adjusting a floating head according to a third aspect, in which a light reflecting section is formed in the suspension member, and the light is directed toward the reflecting section. The present invention is characterized in that assembly and adjustment are performed while detecting the inclination of the suspension member by irradiating light and receiving reflected light from the reflecting portion.

[0013]

According to the structure of claim 1, the flying head is raised and lowered relative to the recording medium while the recording medium is being driven. In other words, when the recording medium is stopped, the floating head is held in a position not in contact with the recording medium, and
After the recording medium starts to be driven, the floating head is lowered near the surface of the recording medium and the floating head is made to float while avoiding contact with the recording medium as much as possible. It is possible to prevent the head from adsorbing.

According to the second aspect of the present invention, the floating head is raised and lowered relative to the recording medium in the driving state in such a manner that the surface of the floating head facing the recording medium is substantially parallel to the surface of the recording medium. Therefore, when the floating head is lowered, contact between the floating head and the surface of the recording medium is less likely to occur.

According to the structure of claim 3, since the floating head is raised and lowered by elastically deforming the suspension member, there is no need to raise and lower the fixed part itself to which one end of the suspension member is fixed. . Thereby, the structure of the elevating member can be simplified.

According to the fourth aspect of the assembly and adjustment method, the suspension member is provided with a reflection section to optically detect the inclination of the suspension member, and the floating head is assembled while performing assembly and adjustment based on this. As a result, the floating head can be raised and lowered in a posture in which the surface of the floating head facing the recording medium is substantially parallel to the surface of the recording medium.

[0017]

[Example] An embodiment of the present invention FIGS. 1 to 10
The explanation based on this is as follows. FIG. 4 shows a magneto-optical disk device using a floating magnetic head. This device includes a spindle motor 2 that rotationally drives a magneto-optical disk 1, and one surface of the magneto-optical disk 1 (bottom surface in the figure).
is arranged to face the magneto-optical disk 1 and irradiates the magneto-optical disk 1 with a laser beam through the objective lens 3.
In addition to reproducing information based on the reflected light from
An optical head 4 that moves in the radial direction of the magneto-optical disk 1 by a moving means such as a linear motor, and a magneto-optical A floating magnetic head 5 that applies a magnetic field to the disk 1 is provided.

One end of a suspension 6 made of a leaf spring is fixed to the upper horizontal part of a fixed part 7, and the floating magnetic head 5 is supported by the other end of the suspension 6. The fixed part 7 is connected to a moving means different from the moving means for the optical head 4, for example, and is moved in the radial direction of the magneto-optical disk 1.

The suspension 6 used in the above-mentioned magneto-optical disk device will be explained based on FIGS. 5 and 6. The suspension 6 is made of stainless steel with a thickness of about 70 μm, and its width becomes gradually narrower as it approaches the floating magnetic head 5. A metal plate 8 (about 6 mm in the radial direction of the magneto-optical disk 1, 10.2 mm in the circumferential direction, and about 0.5 mm in thickness) is welded to one end of the suspension 6, which serves as a connection part to the fixing part 7. The length l1 of the suspension 6 between the respective centers of the slider 10 of the floating magnetic head 5 and the metal plate 8 is 26.41 mm.

The suspension 6 is constructed by attaching a magnetic head body 11 to the slider 10. The length w1 of the slider 10 in the radial direction of the magneto-optical disk 1 is 5 mm, the length w2 in the circumferential direction is 7 mm, and the overall thickness t1 is 5 mm. 2mm,
The thickness t2 from the surface facing the magneto-optical disk 1 to the surface bonded to the suspension 6 is 0.82 mm.

At the end of the surface of the floating magnetic head 5 facing the magneto-optical disk 1 into which air flows due to the rotation of the magneto-optical disk 1, the magneto-optical disk 1 is attached at an angle of, for example, 0.5°. An inclined portion having a width of about 1 mm in the circumferential direction is provided.

The suspension 6 is provided with flanges 12 that are bent upward at both ends in the width direction in a region excluding the protruding base end. The portion of the suspension 6 that has the flange 12 is defined as a non-flexible region 6a, while the portion where the flange 12 is not provided is defined as a flexible region 6b. The floating magnetic head 5 has a deflection area 6
Due to the biasing force b, the magneto-optical disk 1 is biased with a pressing load of, for example, about 1 to 10 gf. The length of the deflection region 6b is approximately 3 to 5 mm. When the surface of the floating magnetic head 5 facing the magneto-optical disk 1 is parallel to the surface of the magneto-optical disk 1, the angle θ4 formed by the surface of the floating magnetic head 5 facing the magneto-optical disk 1 and the suspension 6 is typical. The target is 2.2°
At this time, the upper surface of the metal plate 8 and the floating magnetic head 5
The distance d1 between the facing surface and the magneto-optical disk 1 in
' is assumed to be 2.54 mm.

In this embodiment, as shown in FIG. 1, a first elevating member 13 contacts the non-deflecting region 6a of the suspension 6 from below and supports it so that it can rise and fall freely, and a second elevating member 13 is attached to the fixed part 7. A member 14 abuts from below and supports it so that it can move up and down. The first and second elevating members 13 and 14 are raised and lowered simultaneously.

When lowering the floating magnetic head 5 onto the rotating magneto-optical disk 1, it waits at a position away from the surface of the magneto-optical disk 1 (the elevating members 13 and 14 are at position A). The first and second elevating members 13 and 14 descend while keeping the heights of the floating magnetic head 5, suspension 6, and fixed part 7 constant. During this descent, as shown in FIG.
1 becomes approximately 0°, and as shown in FIG. The inclination of the head 5 is adjusted.

Then, when the distance between the surface of the floating magnetic head 5 facing the magneto-optical disk 1 and the surface of the magneto-optical disk 1 reaches a predetermined value, the lowering of the fixing part 7 is stopped, and the fixed part 7 is stopped. The portion 7 is supported so as to be movable only in the radial direction of the magneto-optical disk 1 (elevating member 13
14 is present at position B). From this state, the first and second elevating members 13 and 14 further descend to position C, and the suspension 6 is released from being held by the first elevating member 13, so that the floating magnetic head 5 moves toward the magneto-optical disk.
It floats with a predetermined distance between it and the surface of the surface.

Note that since the floating magnetic head 5 is lowered in a posture such that the surface facing the magneto-optical disk 1 is approximately parallel to the surface of the magneto-optical disk 1, the first elevating member 13 is separated from the suspension 6, and At the time when the floating magnetic head 5 starts floating due to air pressure, it becomes difficult for the floating magnetic head 5 to come into contact with the magneto-optical disk 1.

On the other hand, when the floating magnetic head 5 finishes flying, the first and second elevating members 13 and 14 rise from position C, contrary to the above, and come into contact with the suspension 6 and the fixed part 7 at position B. By further rising to position A, the floating magnetic head 5 is held at a position away from the magneto-optical disk 1. Thereafter, the rotation of the magneto-optical disk 1 is finished. Note that in this embodiment, the floating magnetic head 5
Since there is no opportunity for contact between the floating magnetic head 5 and the magneto-optical disk 1, the problem of the floating magnetic head 5 and the magneto-optical disk 1 being attracted to each other is also avoided.

As described above, since the fixed part 7 needs to be raised and lowered by the second elevating member 14, the fixed part 7 is moved by a moving means separate from the moving means for the optical head 4 to move the magneto-optical disk 1.
The optical head 4 is moved in the radial direction or is connected to the moving means for the optical head 4 via a removable coupling means.

Next, another embodiment of the present invention will be described based on FIG. In this embodiment, the height position of the fixed part 7 is fixed without being raised or lowered, and the lifting member 15 is brought into contact with the non-flexible region 6a of the suspension 6 from below.
By moving the floating magnetic head 5 up and down between positions A and C between positions A and C, the flexible region 6b of the suspension 6 is elastically deformed, and the floating magnetic head 5 is moved up and down with respect to the magneto-optical disk 1. Also in this case, when the lifting member 15 leaves the suspension 6 at position B when the floating magnetic head 5 is lowered, the surface of the floating magnetic head 5 facing the magneto-optical disk 1 becomes almost parallel to the surface of the magneto-optical disk 1. The inclination of the floating magnetic head 5 is adjusted so as to maintain the posture. In this embodiment, since there is no need to raise and lower the fixed part 7, only a single raising and lowering member 15 needs to be provided.
It also becomes possible to integrate the fixing part 7 and the optical head 4.

9 and 10 show the floating magnetic head 5 in the embodiment shown in FIG. 7 by repeatedly moving the elevating member 15 up and down.
, and the presence or absence of contact between the floating magnetic head 5 and the magneto-optical disk 1, the attitude of the floating magnetic head 5, and the pressing load of the floating magnetic head 5 on the magneto-optical disk 1 (
This shows the results of investigating the relationship between In the experiment, a floating magnetic head 5 with a magneto-optical disk 1 having a radial length of 5 mm, a circumferential length of 7 mm, and a thickness of 2 mm was used.

The suspension 6 has the shape shown in FIGS. 5 and 6, and the height d1 of the fixed part 7 relative to the magneto-optical disk 1 is d1=
A magnetic head with specifications such that the pressing load is approximately 9 gf when the diameter is 2.54 mm was used, and the attitude of the floating magnetic head 5 was adjusted by changing d1 and the radial inclination θ3 (FIG. 8) of the fixed portion 7. Further, regarding the angle θ2 in the circumferential direction (FIG. 3), the inclination of the fixing portion 7 in the circumferential direction was fixed horizontally, and was set to approximately 0°.

The magneto-optical disk 1 has groove processing,
Only a glass substrate with a diameter of 86 mm without any coating was used and rotated clockwise at 3000 rpm. A floating magnetic head 5 is mounted on this magneto-optical disk 1.
was positioned so that its center was located at a disk radius of 33 mm, and the floating magnetic head 5 was raised and lowered repeatedly. The floating magnetic head 5 was raised and lowered at a speed of 11.5 mm/s both during raising and lowering, and one set of raising and lowering was performed at a cycle of 2 seconds.

The contact between the floating magnetic head 5 and the magneto-optical disk 1 is determined by using an AE (Acoustic Emission) manufactured by Fuji Electric Co., Ltd. bonded to the floating magnetic head 5.
Detected using a sensor. In addition, the experiment was conducted under the condition that the floating magnetic head 5 stably floats without contacting the magneto-optical disk 1 while the magneto-optical disk 1 is rotating, except during the vertical movement. Therefore, the above A
It can be said that the AE signal (contact signal) detected by the E sensor is generated when the floating magnetic head 5 moves up and down.

In FIGS. 9 and 10, a white circle indicates a state in which no AE signal is output, a double circle consisting of a white circle and a black circle indicates a state in which an AE signal is sometimes output, and a small black circle indicates a state in which the floating magnetic head 5 is raised. An AE signal is always generated every time the floating magnetic head 5 moves up or down, but this shows that the signal level is relatively low, and the large black circle indicates a state where the AE signal is generated every time the floating magnetic head 5 moves up or down. .

As mentioned above, in the experiment, the height d1 and the inclination θ3 of the fixed part 7 were changed in order to adjust the attitude of the floating magnetic head 5, and the height of the floating magnetic head 5 at this time with respect to the magneto-optical disk 1 was changed. After actually measuring the pressing load (Load), it was repeatedly raised and lowered to check for contact. Further, the angle formed between the suspension 6 and the magneto-optical disk 1 when the floating magnetic head 5 was in a floating state was measured as θ4.

To measure θ4, in FIG. 8, a reflective section 16 is formed by, for example, pasting a reflective tape on the non-deflecting region 6a of the suspension 6, and a laser light source 17 emits a laser beam almost vertically. do. This laser light passes through a minute hole 20 provided in the screen 18 and is reflected by the reflection section 16, forming a light spot S on the screen 18. At this time, the hole 20 from which the laser beam is emitted
The distance between the center of Δx and the spot S caused by the reflected light is Δx
, if the distance from the screen 18 to the reflective section 16 is L, then Δx=L・tan2θ4, so θ4=(
1/2)·tan-1(Δx/L).

FIG. 10 shows the above experimental results on the vertical axis with θ4,
The horizontal axis shows the pressing load (Load). In the range of pressing load shown in the figure, θ4 is 0°15' to
It can be seen that within the range of 2°50', the floating magnetic head 5 can be raised and lowered without contacting the magneto-optical disk 1. Also, when adjusting the attitude of the floating magnetic head 5,
By setting θ4 as an optimum value of 1°35' to 1°40', the tolerance value for adjustment is ±1°10'.
can be secured.

Furthermore, the angle between the floating magnetic head 5 and the suspension 6 used in the experiment when the floating magnetic head 5 is separated from the magneto-optical disk 1 (the angle between the lower surface of the floating magnetic head 5 and the suspension 6) is The angle with respect to the deflection area 6a) was 1°40'. As a result, θ on the vertical axis
4 to θ1 in Figure 2, it becomes the vertical axis on the right, and θ
1 is -1°25'~ centered at -0.05°~0°
It can be seen that 1°10' is a region where no contact occurs.

On the other hand, in actual assembly of a magneto-optical disk device, the target values of θ3 and d1 shown in FIG.
Adjustments are often made. FIG. 9 shows the results shown in FIG. 10 converted into d1 on the vertical axis and θ3 on the horizontal axis. Figure 9
From this, it can be seen that the area d1 having a width of about 1 mm and parallel to the upward slope to the right is a non-contact area where no contact occurs.

A specific example of setting the optimum design value and allowable value will be described using this figure. When using the suspension 6 and the floating magnetic head 5 and setting a pressing load of 5 gf, it is known from the pressing load data that θ3 is approximately 6°. Assuming θ3 = 6°, at the center P0 of d1 in the non-contact area at this time, d1 = 2.02 mm. Therefore, the optimal values are θ3 = 6°, d1 = 2.02
It becomes mm.

Next, when θ3 is estimated to have a maximum tolerance of ±1° during machining, θ3 = 5° and θ3 = 7
Draw a perpendicular line to .degree., and let the intersections with the upper and lower limits of the non-contact area be P1 to P4 as shown in the figure. At this time, P2,
A horizontal line is drawn from P3, and the area indicated by diagonal lines surrounding P0 is the permissible range. In other words, θ3 is 5°±
1°, d1 has a dimensional tolerance of 2.02mm±0.45mm.

Furthermore, the lifting and lowering operations of the floating magnetic head 5 are as follows:
1 on a magneto-optical disk 1 made of a polycarbonate substrate.
The test was repeated 10,000 times. The experimental conditions were the same as those for the magneto-optical disk 1 made of a glass substrate, and θ3
, d1, the depth of the scratch formed on the surface of the magneto-optical disk 1 is as follows even if d1 is further shifted outward by about 0.2 mm from the non-contact area in FIGS.
The thickness was 0.2 μm at most, and the recorded information was not damaged. From this, it has been found that by allowing more contact between the floating magnetic head 5 and the magneto-optical disk 1, the allowable value of d1 can be further increased.

When assembling and adjusting the design values obtained as described above, as shown in FIG. 8, the angle θ4 between the suspension 6 and the magneto-optical disk 1 is detected by reflecting the laser beam at the reflection section 16. However, by adjusting d1 and θ3, it becomes possible to accurately adjust the attitude of the floating magnetic head 5. In other words, if L in the figure is made long, even a minute change in θ4 due to adjustment of d1 and θ3 will be magnified and can be detected with high sensitivity as a change in Δx. The fixing portion 7 may be fixed at the point where Δx is sufficiently close to the target value.

Although the above description has been made regarding a floating magnetic head, the present invention can also be applied to floating optical heads and the like.

[0045]

Effects of the Invention In order to solve the above-mentioned problems, the floating head according to the present invention is provided with an elevating member that raises and lowers the floating head with respect to the recording medium while the recording medium is being driven. Structure of claim 1).

As a result, when the recording medium is stopped, the floating head is held at a non-contact position with the recording medium, and
After the recording medium starts to be driven, the floating head is lowered near the surface of the recording medium and the floating head is made to float while avoiding contact with the recording medium as much as possible. It is possible to prevent the head from adsorbing.

Further, another floating head according to the present invention includes:
In addition to the structure of claim 1, the elevating member is configured to move the floating head up and down such that a surface of the floating head that faces the surface of the recording medium is substantially parallel to the surface of the recording medium. (Structure of claim 2).

[0048] As a result, the floating head moves up and down with respect to the recording medium in the driving state in a posture in which the surface of the floating head facing the recording medium is almost parallel to the surface of the recording medium. When the head is lowered, contact between the floating head and the surface of the recording medium becomes less likely to occur.

Still another floating head according to the present invention is
In addition to the structure of claim 1 or 2, the suspension member includes a suspension member having one end fixed to a fixed part and supporting the floating head at the other end, and the elevating member moves up and down while abutting the suspension member. The floating head is configured to move up and down by elastically deforming the member (configuration according to claim 3).

[0050] Since the floating head is raised and lowered by elastically deforming the suspension member, there is no need to raise and lower the fixed part itself to which one end of the suspension member is fixed. Therefore, the structure of the elevating member can be simplified.

In the method for assembling and adjusting a floating head according to the present invention, when carrying out the method for assembling and adjusting a floating head according to claim 3, a reflecting portion for light is formed in the suspension member, and light is directed toward the reflecting portion. The assembly and adjustment are performed while detecting the inclination of the suspension member by emitting light from the suspension member and receiving the reflected light from the reflection portion.

As a result, by optically detecting the inclination of the suspension member and assembling the floating head while making assembly adjustments based on this, the surface of the floating head facing the recording medium is aligned with the surface of the recording medium. The floating head can now be raised and lowered in an attitude that is almost parallel to the .

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a magneto-optical disk device including a floating magnetic head in an embodiment of the present invention.

FIG. 2 is an explanatory diagram of how the floating magnetic head moves up and down as seen from the radial direction of the magneto-optical disk.

FIG. 3 is an explanatory diagram of how the floating magnetic head moves up and down as seen from the circumferential direction of the magneto-optical disk.

FIG. 4 is an overall configuration diagram showing the magneto-optical disk device.

FIG. 5 is a schematic plan view showing the floating magnetic head.

FIG. 6 is a schematic side view showing the floating magnetic head.

FIG. 7 is a schematic configuration diagram showing a magneto-optical disk device including a floating magnetic head in another embodiment of the present invention.

FIG. 8 is a schematic configuration diagram showing how the floating magnetic head is assembled and adjusted.

FIG. 9 is an explanatory diagram showing the presence or absence of contact when the floating magnetic head is repeatedly raised and lowered over the magneto-optical disk in relation to the height of the fixed portion and the inclination of the fixed portion with respect to the magneto-optical disk.

FIG. 10 is an explanatory diagram showing the relationship between the inclination of the suspension with respect to the magneto-optical disk and the pressing load of the suspension to determine whether or not there is contact when the floating magnetic head is repeatedly raised and lowered over the magneto-optical disk.

[Explanation of symbols]

1 Magneto-optical disk 5 Floating magnetic head 6 Suspension 6a Non-deflection area 6b Deflection area 7 Fixed part 10 Slider 11 Magnetic head body 13 First lifting member 14 Second lifting member 15 Lifting member

Claims (4)

[Claims] Claim 1: An information recording source is attached to a slider,
A floating head that performs recording while floating above the surface of a recording medium as the recording medium is driven, characterized by comprising an elevating member that raises and lowers the floating head with respect to the recording medium while the recording medium is being driven. floating head. 2. The elevating member is configured to move the floating head up and down such that a surface of the floating head facing the surface of the recording medium is substantially parallel to the surface of the recording medium. The floating head according to claim 1. 3. A suspension member having one end fixed to a fixed part and supporting the floating head at the other end, and
3. The floating head according to claim 1, wherein the lifting member is configured to move up and down while contacting the suspension member and elastically deform the suspension member, thereby causing the floating head to move up and down. type head. 4. The method for assembling and adjusting a floating head according to claim 3, wherein a light reflecting portion is formed in the suspension member, and light is irradiated toward the reflecting portion to reduce the reflected light from the reflecting portion. A method for assembling and adjusting a floating head, characterized in that assembling and adjusting is performed while detecting the inclination of a suspension member by receiving light.