JP2000076809A - Magnetic head device and manufacture of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To position a support arm and a support base to attach to a base stand with high precision. SOLUTION: A support arm 122 which supports a head part, a base plate 123 which is attached to the base part of the support arm 122 and an arm holding member to which the base plate 123 is attached are provided. A positioning reference part with which the support arm 122 is positioned to attach to the arm holding member is formed on the support arm 122 so as to protrude from the outer circumference part of the base plate 123 attached to the base part of the support arm 122.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device for recording and / or reproducing information signals on a disk-shaped recording medium such as a magnetic disk and a magneto-optical disk, and a method of manufacturing the magnetic head device.

[0002]

2. Description of the Related Art Conventionally, there is a disk cartridge in which a magnetic disk is rotatably housed in a cartridge body. An example of such a removable disk cartridge is a magnetic disk having a signal recording layer formed on a flexible disk substrate and having a diameter of 3.5 inches, that is, a so-called flexible disk as an information recording medium. It has been known.

[0003] A disk drive device which mounts a disk cartridge of this type and records and reproduces information signals on a magnetic disk has a head unit having a magnetic head element for recording and reproducing information signals on a signal recording surface of the magnetic disk. A head mechanism for supporting is provided. Further, the disk drive device includes a moving mechanism for moving a head portion in a radial direction of the magnetic disk via a head mechanism, a disk table on which the magnetic disk is mounted, and a spindle motor for rotating the disk table. Disk drive mechanism.

The head mechanism includes a head for recording and reproducing information signals on and from a magnetic disk, a support arm for supporting the head at a distal end, a base plate for supporting a base end of the support arm, An arm holding member for holding the support arm via the base plate.

[0005] The support arm has a head portion attached to the distal end and a base plate attached to the proximal end. Further, a guide hole for positioning the mounting position of the support arm in the longitudinal direction when the support arm is mounted on the arm holding member via the base plate is formed on the main surface of the support arm. On the outer peripheral portion of the base plate, a side serving as a reference for positioning the mounting position in the width direction of the support arm when the base plate is mounted on the arm holding member is formed. The arm holding member is supported by the moving mechanism.

With respect to the head mechanism configured as described above, a state in which the support arm and the base plate are positioned and attached to the arm holding member will be described with reference to the drawings.

First, a base plate is positioned and attached to the base end of the support arm to which the head is attached. Then, as shown in FIG. 17, a guide pin 307 erected on a jig (not shown) is inserted into a guide hole 306 of the support arm 302, as shown in FIG.
The urging means (not shown) is urged in the direction of arrow c in FIG. 17 so that the guide pin 307 abuts against one end of the guide hole 306.

The head mechanism is configured so that abutment surface 309 formed on positioning jig 304 abuts against reference side 308 formed on the outer periphery of base plate 303 attached to support arm 302. 17 are urged in the direction of arrow d in FIG.

The support arm 302 to which the base plate 303 is attached is urged in the directions of arrows c and d in FIG. 17, whereby the attachment position with respect to the arm holding member is determined and fixed to the arm holding member. .

In the above-mentioned disk drive device, when a disk cartridge is loaded in the device main body, the magnetic disk in the disk cartridge is mounted on a turntable and is driven to rotate. In the head mechanism, the support arm 302 is moved in the radial direction of the magnetic disk via the moving mechanism, and the head unit records and reproduces information signals on the magnetic disk.

[0011]

With the increase in the capacity of information signals to be handled, the conventional 2 MB (megabyte)
A high-capacity disk cartridge in which a magnetic disk (hereinafter, referred to as a high-capacity disk) whose recording density is increased so as to have a recording capacity of several tens MB to several hundreds MB with respect to the recording capacity of the medium is proposed. Have been.

The high-capacity disk of this type of high-capacity disk cartridge has a narrow track width and a narrow pitch in order to increase the density of recording tracks formed on the signal recording surface. I have. Therefore, if such a high-capacity disk is slightly displaced by rotation without following the displacement of the magnetic disk due to disturbance of the magnetic head, the high-capacity disk deviates from the recording track to be accessed, and the target recording track is tracked. Cannot be performed, and accurate recording and reproduction of information signals cannot be performed.

Therefore, a magnetic head element corresponding to a high-capacity disk needs to be positioned with high precision with respect to the high-capacity disk. Therefore, it is necessary to position and fix the support arm 302 provided with the magnetic head element to the arm holding member with high precision.

As described above, in the conventional head mechanism, when the support arm 302 and the base plate 303 are attached to the arm holding member, the side 308 formed on the outer peripheral portion of the base plate 303 attached to the support arm 302 is used. It was attached to the arm holding member as a positioning reference.

For this reason, the conventional head mechanism has a problem that the accuracy of the mounting position of the support arm 302 with respect to the arm holding member is deteriorated according to the accuracy of the mounting position of the base plate 303 previously mounted on the support arm 302. there were.

When positioning the support arm 302 and the base plate 303 with respect to the arm holding member, the head mechanism applies an urging force for abutting the outer peripheral portion of the base plate 303 against the abutting surface 309 of the positioning jig 304. 17 and a guide pin 307 is provided at one end of the guide hole 306 of the support arm 302.
17 must be urged in the direction of arrow c in FIG. 17, and since the urging forces are urged in these two directions, the work of positioning the mounting position is complicated and the positioning accuracy is poor. There was a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic head device capable of positioning and attaching a support arm and a support base to a base with high accuracy, and a method of manufacturing the magnetic head device. And

[0018]

In order to achieve the above-mentioned object, a magnetic head device according to the present invention comprises a support arm for supporting a head having a magnetic head element, and a support base mounted on a base of the support arm. And a base to which the support base is attached. A positioning reference portion for positioning the support arm with respect to the base is formed on the support arm so as to protrude from an outer peripheral portion of a support base attached to the base of the support arm.

According to the magnetic head device configured as described above, the support arm is positioned and attached to the base with reference to the positioning reference portion formed on the support arm provided with the head portion.

In order to achieve the above-mentioned object, a method of manufacturing a magnetic head device according to the present invention comprises the steps of: after a support base is attached to a base of a support arm, from the outer periphery of the support base attached to the base of the support arm. The support base is mounted on the base using the positioning reference portion protruded and formed on the support arm as a positioning reference for the base.

In the method of manufacturing a magnetic head device configured as described above, the support arm on which the support base is mounted is positioned and mounted on the base with reference to the support arm on which the positioning reference portion is formed. . That is,
According to this method of manufacturing a magnetic head device, when the support arm and the support base are attached to the base, the support arm provided with the head portion is used as a reference.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described. The disk drive will be described with reference to the drawings. A method of manufacturing a head mechanism provided in the disk drive device will be described with reference to the drawings.

As shown in FIG. 1, the disk drive device 100 is used by inserting and removing a disk cartridge containing a magnetic disk as an information recording medium into and from the device main body. The disk drive device 100
A first disk cartridge containing a first magnetic disk on which an information signal is recorded / reproduced corresponding to the first recording density, and a second recording density corresponding to a higher recording density than the first recording density. The recording and reproduction of the information signal is performed by selectively using one of the second disk cartridges storing the second magnetic disk for recording and reproducing the information signal.

The disk drive device 100 according to the present invention
Prior to the description, first and second disk cartridges used in the disk drive device 100 will be described. Each of the magnetic disks housed in these disk cartridges is formed to have a diameter of 3.5 inches.

As shown in FIGS. 2 and 3, the first disk cartridge 5 has a first magnetic disk 6 on which information signals are recorded at a first recording density and which has a recording capacity of about 2 MB (megabytes). To store. The first magnetic disk 6 housed in the first disk cartridge 5 has a disk substrate 7 made of a synthetic resin having flexibility, and a magnetic layer is applied to both main surfaces of the disk substrate 7. The signal recording surface is formed. A circular center hole is formed at the center of the disk substrate 7, and a hub 8 is attached so as to close the center hole. The hub 8 is formed using a magnetic material such as stainless steel or iron, and a cylindrical protrusion is fitted into the center hole, and a flange provided around the protrusion is adhered to the periphery of the center hole. To the disk substrate 7. At the center of the hub 8 is formed a rectangular spindle hole 8a through which a spindle of a disk rotation driving mechanism provided on the disk drive device 100 side is inserted. The disk rotation driving mechanism is eccentric to the center. Drive pin engaging hole 8b having a rectangular shape with which a drive pin provided in
Are drilled.

The first magnetic disk 6 formed as described above houses the magnetic disk 6 rotatably housed in a cartridge body 11 formed by butt-connecting a pair of upper and lower halves 9 and 10. Cartridge body 11
As shown in FIG. 3, a circular central opening 12 into which a disk table constituting a disk rotation drive mechanism enters is provided at a substantially central portion on the lower surface side of the disk drive. In addition, the opposite positions of the upper and lower surfaces of the cartridge body 11 are shown in FIG.
And a rectangular recording / reproducing opening 1 as shown in FIG.
3 and 14 are provided. These openings 13 and 14
Is formed at the center in the left-right direction of the cartridge body 11 and is formed from the vicinity of the center opening 12 to the front side of the cartridge body 11. Cartridge body 11
In the first magnetic disk 6 housed in the first magnetic disk 6, a part of the signal recording section is exposed outward through the inner and outer peripheries through the recording and reproducing openings 13 and 14. Further, the cartridge body 11
As shown in FIGS. 2 and 3, an erroneous recording prevention hole 15 for restricting the overwriting of the information signal on the magnetic disk 6 housed therein is provided at one corner portion on the back side of the recording medium. Further, an erroneous recording prevention hole 15 on the lower surface side of the cartridge body 11 is provided.
As shown in FIG. 3, a disk identification hole 16 indicating the specification of the magnetic disk housed in the cartridge main body 11 is provided in the other corner portion on the side opposite to the side provided with.
By detecting the disk identification hole 16, the magnetic disk 6 accommodated in the cartridge main body 11 has a size of 2 MB.
Are identified.

As shown in FIG. 3, the first disk cartridge 5
When the disk drive device 100 is mounted on the disk drive device 100, positioning pin engagement holes 17 and 18 for positioning the cartridge mounting position provided on the device 100 side are provided. As shown in FIG. 3, these positioning pin engaging holes 17 and 18 are provided so as to be located on both sides of the recording and reproducing openings 13 and 14.

As shown in FIG.
And openings 13 and 14 for recording / reproducing as shown in FIG.
A shutter member 19 for opening and closing the shutter is mounted. The shutter member 19 is formed in a U-shaped cross section by using a metal plate such as aluminum or stainless steel or by molding a synthetic resin, and covers the recording and reproducing openings 13 and 14 from the front side of the cartridge body 11. the fitted, mounted movably in FIGS. 2 and 3 in the arrow a ₁ direction and the arrow a ₂ direction to open and close these openings 13, 14. Shutter unit 1 extending to upper and lower surfaces of cartridge body 11 of shutter member 19 and covering recording and reproducing openings 13 and 14
9a, the 19b, the shutter member 19 is moved in the arrow a ₁ direction in FIG. 2 and FIG. 3, the openings 13 to correspond to the opening 13, 14 when moved to a position to open the opening 13, 14 Rectangular cutout holes 2 opening the.
0 and 21 are provided.

The shutter member 19 has a spring member (not shown) disposed in the cartridge body 11, and the shutter portions 19a and 19b close the recording and reproducing openings 13 and 14 by arrows a in FIGS. It is biased to move in _two directions.

FIGS. 4 and 5 show a second disk cartridge 22 containing a second magnetic disk 23 on which information signals are recorded at a second recording density higher in recording density than the first magnetic disk 6 described above. As shown in (1), the size and thickness are formed in common with the first disk cartridge 5 described above.

The second magnetic disk 23 accommodated in the second disk cartridge 22 has a flexible synthetic resin disk substrate 24 like the first magnetic disk 6 described above. A magnetic layer is applied to both main surfaces of the disk substrate 24 to form a signal recording portion. A circular center hole is formed in the center of the disk substrate 24, and a hub 25 is attached so as to close the center hole. The hub 25 is formed using a magnetic material such as stainless steel or iron, and a cylindrical projection is fitted into the center hole, and a flange provided around the periphery of the projection is adhered to the periphery of the center hole. To the disk substrate 23. This hub 25
Is formed with a circular spindle hole 25a through which a spindle of a disk rotation drive mechanism provided on the disk drive device 100 side is inserted, and is provided in the disk rotation drive mechanism at a position eccentric to the center. A rectangular drive pin insertion hole 25b through which the drive pin is inserted is formed.

The second magnetic disk 23 formed as described above has a recording capacity of 100 MB or more, preferably 20 MB.
It is formed to have a recording capacity of 0 MB or more. The second magnetic disk 23 has a pair of upper and lower halves 2.
As shown in FIG. 4, a substantially central portion on the lower surface side of the cartridge main body 28 containing the second magnetic disk 23, which is rotatably accommodated in the cartridge main body 28 formed by butt-connecting the 6 and 27, is formed. A central opening 29 having a circular shape into which a disk table constituting a disk rotation drive mechanism enters is provided. The cartridge body 28
As shown in FIGS. 4 and 5, rectangular recording / reproducing openings 30 and 31 are provided at opposing positions on the upper and lower surfaces. The openings 30 and 31 are located at the center in the left-right direction of the cartridge body 28 and are formed from the vicinity of the center opening 29 to the front side of the cartridge body 28. In the second magnetic disk 23 housed in the cartridge body 28, a part of the signal recording section is exposed to the outside over the inner and outer peripheries through the recording and reproducing openings 30 and 31.

By the way, the second magnetic disk 23 has a signal recording section up to the vicinity of the outer peripheral edge in order to realize a high capacity. The signal recording portion formed up to the vicinity of the outer peripheral edge of the second magnetic disk 23 faces the outside of the cartridge main body 28, and the recording / reproducing opening 30 is accessed by the head portion of the disk drive device 100. ,
Reference numeral 31 is formed larger than the recording and reproducing openings 13 and 14 provided in the first disk cartridge 5 described above. That is, the recording / reproducing openings 30 and 31 provided in the second disk cartridge 22 are formed to be enlarged to the vicinity of the front surface of the cartridge main body 28 as shown in FIG.

Further, as shown in FIGS. 4 and 5, erroneous recording for restricting the overwriting of the information signal on the second magnetic disk 23 stored in the other corner portion on the back side of the cartridge main body 28, as shown in FIGS. A prevention hole 32 is provided. The erroneous recording prevention hole 32 is provided at a position opposite to that of the first disk cartridge 5, and an erroneous recording prevention member 36 is provided.
Are movably arranged. As shown in FIG. 5, a detection hole 33 is provided at one corner of the lower surface of the cartridge body 28 opposite to the side where the erroneous recording prevention hole 32 is provided. The detection hole 33 is provided at a position where the erroneous recording prevention hole 15 of the first disk cartridge 5 is provided, and when the disk drive device 100 is mounted on the disk drive device 100 using only the first disk cartridge 5,
The detection is detected by the erroneous recording detection mechanism provided in the disk drive device 100, the recording of the information signal on the second magnetic disk 23 is prohibited, and the information signal recorded on the second magnetic disk 23 at high density is erased. It is intended to prevent it from being done.

As shown in FIG. 5, a second disk cartridge 2 is provided on the lower surface of the cartridge body 28.
When the disk drive 2 is mounted on the disk drive device 100, positioning pin engagement holes 39 and 40 are provided for positioning at the cartridge mounting position provided on the disk drive device 100 side. As shown in FIG. 5, these are provided with positioning pin engagement holes 39, 40 so as to be located on both sides of the recording / reproducing openings 30, 31, respectively. As shown in FIG. 5, the second magnetic disk 23 housed in the cartridge main body 28 is provided on the lower surface side of the cartridge main body 28 so as to be adjacent to one of the positioning pin engagement holes 39. A disc capacity identification hole 34 is provided to indicate that a disc having a recording capacity of, for example, 200 MB is stored.

Further, on the upper surface side of the cartridge body 28, the disk drive device 1 is located at one corner on the front side where the recording and reproducing openings 30 and 31 are provided.
A groove 41 for preventing erroneous insertion that regulates the direction of insertion into 00 is provided.

The second disk cartridge 22 is also provided with a shutter member 42 for opening and closing the recording / reproducing openings 30, 31 similarly to the first disk cartridge 5. The shutter member 42 is also formed by using a metal plate such as aluminum or stainless steel, or by molding a synthetic resin.

The shutter member 42 provided in the second disk cartridge 22 has openings 30 and 3 for recording and reproduction.
Shutter portions 42a and 42b large enough to close block 1
The shutter members 42a and 42b are connected to each other.
Support section 4 having a U-shaped cross section for supporting the shutter
Reference numerals 3 and 44 protrude from both sides on the base end side of the shutter portions 42a and 42b, and are formed so as to form a substantially T-shape as a whole.

By the way, the second disk cartridge 2
The recording / reproducing openings 30 and 31 provided in the second
In order to make the signal recording portion formed near the outer peripheral edge of the magnetic disk 23 face the outside of the cartridge main body 28, the signal recording portion is formed near the front surface of the cartridge main body 28 and provided on the first disk cartridge 5 described above. It is formed to be larger than the recording and reproducing openings 13 and 14. The recording / reproducing opening 30, which is thus enlarged,
As shown in FIG. 4, when the shutter member 42 is moved to a position where the openings 30 and 31 are opened, as shown in FIG. 29, 30 cartridge body 2
A cutout recess 45 is formed to open the front side of 8. That is, the notch concave portion 45 is formed in a portion of the shutter support portion 43 extending to the upper and lower surfaces of the cartridge main body 28.

The shutter member 42 formed as described above
Is a shutter section 42 from the front side of the cartridge body 28.
a, 42b are fitted to be extended over the opening 30, 31 for recording and reproduction, 4 and 5 in the arrow a ₁ shutter portion 42a, 42b to open and close the openings 30, 31
Movably mounted on the direction and the arrow a ₂ direction.

The shutter member 42 has a spring member (not shown) disposed in the cartridge main body 28. The shutter portions 42a and 42b close the recording and reproducing openings 30 and 31 by arrows a in FIGS. It is biased to move in _two directions.

Next, a first disk cartridge 5 containing a first magnetic disk 6 for recording an information signal at the first recording density configured as described above, and a recording density higher than the first recording density. The information signal can be recorded / reproduced selectively using one of the second disk cartridges 22 accommodating the second magnetic disk 23 on which the information signal is recorded at a high second recording density. A disk drive device 100 according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, a disk drive device 100 includes a device main body 101 on which a disk cartridge is mounted, a lower cover for protecting a bottom portion of the device main body 101, and the device main body 101, for example, a computer housing. And a mounting base 103 for mounting to a mounting portion in the body.

As shown in FIGS. 1 and 6, the apparatus main body 101 includes a base 105 formed of a metal plate or an aluminum die cast, an upper cover 107 for protecting the inside of the base 105, and an apparatus. First inside body 101
And a front panel 109 having a cartridge insertion / removal opening 110 for inserting / removing the second disk cartridges 5, 22.

As shown in FIGS. 1 and 6, the upper cover 107 is formed by bending a metal plate into a substantially U-shaped cross section, and is attached to the upper end of the base 105.

The front panel 109 is made of a synthetic resin or the like, and is detachably attached to the base 105. The front panel 109, on the upper edge side,
A cartridge insertion / removal opening 110 large enough to allow the first or second disk cartridge 5, 22 to be inserted horizontally with the front end side to which the shutter members 19, 42 are attached as an insertion end is provided. The cartridge insertion / removal opening 110 is closed by an opening / closing door 112 which is turned toward the inside of the apparatus main body 101 when the first or second disk cartridge 5, 22 is not mounted in the apparatus main body 101. ing.

On both sides of the lower edge of the front panel 109, there are eject buttons for operating an eject mechanism (not shown) for ejecting the first or second disk cartridges 5, 22 mounted in the apparatus main body 101 from the apparatus main body 101. 113 and a light-emitting display unit 114 for displaying the operation state of the disk drive device 100 are provided.

As shown in FIG. 6, the apparatus main body 101 constituting the disk drive apparatus 100 includes first or second disk cartridges 5 and 22 stored in the first or second disk cartridges 5 and 22, respectively.
A head mechanism 116 for recording / reproducing information signals to / from the magnetic disks 6, 23, a moving mechanism 117 for moving the head mechanism 116 in the radial direction of the first or second magnetic disk 6, 23, A disk rotation drive mechanism 118 for rotationally driving the second magnetic disks 6 and 23; and a disk cartridge 5 and 22 at a cartridge mounting position where recording and reproduction of the first or second disk cartridges 5 and 22 are performed.
And a loading mechanism 119 for transferring the data.

The head mechanism 116 is mounted on the base 105 in the apparatus main body 101, and is mounted on the base 105 in the apparatus main body 101.
In addition, at a position facing the second disk cartridges 5, 22, the first and second magnetic disks 6, 23 are movably disposed in a radial direction via a moving mechanism 117.

As shown in FIGS. 6 and 7, this head mechanism 116 has head sections 121, 121 for recording and reproducing information signals corresponding to different first and second recording densities.
And support arms 122, 122 for supporting the heads 121, 121 at the distal ends, and the support arms 122, 1
22, base plates 123, 12
3 and an arm holding member 12 that holds the support arms 122, 122 via the base plates 123, 123.
4 and 124 and a head carriage body 125 to which the arm holding members 124 are attached.

The heads 121, 121 are provided with a first or second
Although not shown, information signals corresponding to the first recording density and the second recording density having different recording densities are disposed at opposite positions with both main surfaces of the magnetic disks 6 and 23 interposed therebetween. A head slider having first and second magnetic head elements for recording and reproducing information, a gimbal spring for swingably supporting the head slider, and a spacer to which the gimbal spring is attached.

Although not shown, the head slider includes a first magnetic head element for recording / reproducing an information signal corresponding to the first recording density, and a second recording density higher than the first recording density. And a second magnetic head element for recording and / or reproducing an information signal corresponding to the above, and a coil and a magnetic core forming member forming a magnetic circuit. The gimbal spring is formed of a thin metal plate, and a head support is formed at a substantially central portion so as to be elastically displaceable. The gimbal spring has the head slider attached to the head support portion, and thereby supports the head slider via the head support portion in a swingable manner. The spacer is formed in a substantially rectangular cylindrical shape having a pivot in contact with the head support portion of the gimbal spring, and an attachment portion to which an outer peripheral portion of the gimbal spring is attached is formed at one end. The other end of the spacer is attached to the tip of the support arm 122.

The support arm 122 is formed of a thin metal plate, and as shown in FIGS. 8, 9 and 10, a first portion 131 on the distal end side for supporting the head portion 121,
A second portion 132 on the base end side to which the base plate 123 is attached, and the first portion 131 and the second portion 1
And a third portion 133 connecting the second portion 32 to the third portion 133. These first, second and third portions 131, 132, 133
Are different in shape from each other so that physical characteristics for following the first or second magnetic disks 6 and 23 in a desired sliding contact state or a floating state are different.

The first portion 131 is formed in consideration of the rigidity in the direction around the axis parallel to the longitudinal direction of the support arm 122 (hereinafter referred to as the pitch direction), and the first or second magnetic disk is formed. The optimization of the initial posture of the support arm 122 with respect to 6 and 23 is achieved.

The second portion 132 has a shape considering rigidity for setting a gap between the slider of the head portion 121 and the signal recording surfaces of the first or second magnetic disks 6 and 23 to a desired value. And the first or third magnetic disk 6, 23
The follow-up performance of the head section 121 with respect to is optimized.

The third portion 133 is shaped in consideration of the rigidity in the direction around the axis parallel to the width direction of the support arm 122 (hereinafter, referred to as the roll direction). The structure avoids resonance with the vibration generated by the spindle motor and the electromagnetic drive unit of the moving mechanism 117.

As shown in FIGS. 9 and 10, the support arm 122 has first and third portions 131 and 133 formed in a tapered shape such that the width thereof gradually decreases toward the distal end. As shown in FIG. 9, the support arm 122 has
Folded pieces 1 bent on the main surface on both sides in the width direction
36, 137 are formed along the longitudinal direction of the first and third portions 131, 133, respectively.

As shown in FIG. 11, the bending height of the bending pieces 136 and 137 with respect to the main surface gradually increases toward the distal end side, as shown in FIG. A small inclined portion 139 is formed.

The bent pieces 136 and 136 of the support arm 122
As shown in FIG. 12, 137 is formed to be inclined with respect to the main surface of the support arm 122, and the inclination angle θ with respect to the main surface is made obtuse. The inclination angle θ is, for example, about 100 °.

The bending pieces 136 and 137 are supported by a head lifting mechanism (not shown) for moving the head section 121 closer to or away from the signal recording surface of the first or second magnetic disk 6 or 23. Attachment pieces 141 to which both ends of the shaft are attached are formed respectively.

As shown in FIGS. 9 and 10, a fixing screw 143 for fixing the support arm 122 to the arm holding member 124 is provided on the second portion 132 of the support arm 122.
The insertion reference hole 145 and the positioning guide hole 146 for positioning the mounting position with respect to the base plate 123 are located on both sides in the width direction with the insertion hole 144 interposed therebetween. Each is drilled. These positioning reference holes 145 and positioning guide holes 146 are positioned with respect to the base plate 123 by inserting positioning reference pins and positioning guide pins of a mounting jig (not shown).

The second part 13 of the support arm 122
2, an opening 148 is formed adjacent to the third portion 133, as shown in FIG.
When the support arm 122 and the base plate 123 are joined and fixed to the edge of the support arm 122, the positioning reference groove 14 for positioning the mounting position of the support arm 122 in the longitudinal direction.
9 is notched. This positioning reference groove 14
9 is formed on the center line of the support arm 122 in the width direction. In addition, the third portion 133 of the support arm 122 is located on the center line in the width direction, and when the support arm 122 and the base plate 123 are joined and fixed,
A positioning guide hole 150 for guiding the mounting position of the support arm 122 in the longitudinal direction is formed.

Then, the first part 1 of the support arm 122
The head unit 121 is mounted on the surface 31 of the first or second magnetic disk 6, 23 facing the signal recording surface at a desired position. As shown in FIG. 11, the head section 121 is provided at a position on the distal end side of the first portion 131 where the inclined section 139 is formed. As shown in FIG. 10, support pieces 152 and 152 for supporting an intermediate portion of a connection line (not shown) connected to the head portion 121 are integrally formed at the corner portion of the second portion 132 so as to protrude. ing.

By the way, the support arm 122 described above
The inclined portions 13 are provided on the bent pieces 136 and 137 of the first portion 131.
However, for example, the shape shown in FIGS. 13 and 14 may be adopted.

As shown in FIG. 13, the support arm 155
Will not be described in detail, but the support arm 12
1st part 157 and 2nd part (not shown) like 2
And the third portion 159, and the bent heights of the bent pieces 161 and 162 of the first portion 157 and the third portion 159 are different from each other. That is, the bent pieces 161 and 162 are formed such that the bent height of the first portion 157 is lower than the bent height of the third portion 159 as shown in FIG. Further, as shown in FIG. 13, the length of the first portion 157 in the longitudinal direction is smaller than the width of the head portion 121 parallel to the track width direction. In other words, the head portion 121 is attached across the first and third portions 157 and 159.

Further, as shown in FIG.
65, the detailed description is omitted, but the first portion 167,
It has a second portion (not shown) and a third portion 169, and the first portion 167 of the bent pieces 171 and 172 is cut out to form the first portion 167 in a flat plate shape. ing. As shown in FIG. 14, the length of the first portion 167 in the longitudinal direction is smaller than the width of the head portion 121 parallel to the track width direction. In other words, the head section 121
Is attached across the first and third portions 167 and 169.

As described above, by appropriately changing the bending height of each portion of the bent piece of the support arm, the characteristics of the entire support arm against bending resonance, torsional resonance, and the like can be optimized.

Further, the second part 1 of the support arm 122
As shown in FIGS. 8, 9 and 10, on the outer peripheral portion of the support 32, when the support arm 122 is mounted on the arm holding member 124, the mounting position of the support arm 122 with respect to the arm holding member 124 is determined. A positioning reference portion 180 is formed. This positioning reference portion 18
Numeral 0 has sides 181, 182, and 183 that serve as references against which the positioning abutment pin abuts.

The pace plate 123 is formed of a metal material in a flat plate shape, and is joined and fixed to a predetermined position on the second portion 132 of the support arm 122 by, for example, laser spot welding as shown in FIG. ing.

9 and FIG.
As shown in FIG. 5, a flange portion 174 having a screw hole 175 into which the fixing screw 143 is screwed is formed for adjusting and attaching to the arm holding member 124. According to the flange portion 174, the position of the head portion 121 attached to the support arm 122 with respect to the first or second magnetic disk 6, 23 is finely adjusted by moving the position via the fixing screw 143 and the flange portion 174. And fixing can be easily performed.

As shown in FIGS. 9 and 15, a positioning reference hole 177 and a positioning guide hole 178 for positioning the mounting position with respect to the support arm 122 are provided on both sides of the flange 174 as shown in FIGS. Are drilled respectively. These positioning reference holes 177 and positioning guide holes 178 are positioned by inserting positioning reference pins and positioning guide pins of a mounting jig (not shown).

Further, on the outer peripheral portion of the base plate 123, as shown in FIG. 15, when the support arm 122 is mounted on the second portion 132, the mounting position of the support arm 122 in the longitudinal direction is determined. A positioning reference groove 179 is cut out and formed on the center line in the width direction of the support arm 122. The positioning reference groove 179 is the positioning reference groove 1 of the support arm 122.
It is formed at a position corresponding to 49.

The outer peripheral portion of the base plate 123
As shown in FIG. 8 and FIG.
In the state of being attached to the portion 132, the sides 181 and 182 of the positioning reference portion 180 of the second portion 132 of the support arm 122 from the outer peripheral portion of the base plate 123.
183 are formed in dimensions slightly projecting, respectively. Each side 1 of the positioning reference portion 180 of the support arm 122
81, 182 and 183 are, for example, 0.1 m from the outer peripheral portion of the base plate 123 as shown in FIGS.
m.

The arm holding member 124 is formed of a rigid material, and has a screw hole 185 into which a fixing screw 143 for fixing the support arm 122 and the base plate 123 is screwed. As shown in FIGS. 6 and 7, the arm holding member 124 slides on an upper surface of a cartridge holder of the loading mechanism 119, which will be described later, to guide the movement of the heads 121, 121 to guide pieces 186, 186. have. The base plate 123 is attached to the arm holding member 124. Head carriage body 1
Reference numeral 25 is formed of a material having rigidity and has a substantially U-shaped cross section, and is movably supported by the moving mechanism 117.

The base plate 1 configured as described above
A method of positioning and mounting the support arm 23 on the second portion 132 of the support arm 122 and a method of mounting the support arm 122 to which the base plate 123 is mounted to the arm holding member 124
A method of positioning and mounting the device will be described below.

First, the head 121 is attached to the support arm 122.
Is attached to the support arm 122, a base plate 123 is attached to the support arm 122 using an attachment jig (not shown). The support arm 122 includes a positioning guide pin and a positioning reference pin that are erected on the mounting jig.
Positioning is performed by being inserted into the positioning guide holes 146 and the positioning reference holes 145, respectively. Further, the support arm 1
Reference numeral 22 denotes a positioning guide shaft provided upright on the mounting jig is inserted into the positioning guide hole 150, and a positioning reference shaft provided upright on the mounting jig is provided with a positioning reference groove 149.
And placed on the mounting jig.

In the base plate 123, the positioning guide pins and the positioning reference pins of the mounting jig are inserted into the positioning guide holes 178 and the positioning reference holes 177, respectively, on the support arm 122 mounted on the mounting jig. At the same time, by abutting the positioning reference axis against the positioning reference groove 179 of the base plate 123, the mounting position of the support arm 122 in the longitudinal direction is positioned and mounted, and is joined and fixed on the second portion 132 of the support arm 122. Is done. Therefore, the base plate 123 is positioned and attached with high precision in the longitudinal direction of the support arm 122.

Next, as shown in FIG. 16, when the support arm 122 to which the base plate 123 is attached is attached to the arm holding member 124, the second portion 1
Each side 182, which is a reference of the 32 positioning reference portions 180,
Abutment pin 1 erected on the mounting jig
88, 188, 188 are respectively hit at three points. Although not shown, the support arm 122 to which the base plate 123 is attached is inserted into the positioning reference holes 145, 177 or the positioning guide holes 146, 178 of the support arm 122 and the base plate 123, and the positioning reference portion 1
Abutting pins 188, 1 for each side 182, 183 of
An urging pin that urges 88 and 188 in a direction in which the urging pins 88 and 188 are respectively inserted is inserted, and the urging pins are struck by the urging force of the urging pins. The support arm 122 receives a biasing force from a biasing pin which acts substantially diagonally on the corner of the second portion 132.

Therefore, when the support arm 122 and the base plate 123 are attached to the arm holding member 124, the support arm 122 provided with the head portion 121 is positioned at three points with respect to the positioning reference. It can be mounted with high precision.

Finally, guide pins (not shown) for adjustment are inserted into the positioning reference holes 145, 177 and the positioning guide holes 146, 178 in the support arm 122 and the base plate 123, and the screw holes in the flange portion 174 of the base plate 123 are formed. By finely adjusting the fixing screw 143 screwed into the 175, the arm holding member 124
Of the base plate 123 is adjusted. Therefore, the support arm 124 to which the base plate 123 is attached accurately positions the head portion 121 with respect to the first or second magnetic disk 6, 23, and easily and reliably holds the arm via the fixing screw 143. It can be fixed to the member 124.

The head section 121 constructed as described above,
The head mechanism 116 having the first 121 records the first magnetic disk 6 on which the information signal is recorded at the first recording density, and records the information signal at the second recording density higher than the first magnetic disk 6. The recording and reproduction of the information signal can be performed corresponding to the second magnetic disk 23 to be performed.

When recording / reproducing an information signal to / from the first magnetic disk 6, the support arms 122, 122
The first magnetic disk 6 is rotationally driven in a state where the first magnetic head elements of the head portions 121, 121 attached to the front end side of the first magnetic disk are in contact with the signal recording surface of the first magnetic disk 6. At this time, the first magnetic disk 6 is rotated at a rotation speed of about 300 rpm by the disk rotation drive mechanism 118, and the recording and reproduction of information signals are performed by the first magnetic head element.

On the other hand, when recording / reproducing information signals to / from the second magnetic disk 23, the second magnetic disk 2
The second magnetic head element of the head units 121, 121 is slightly levitated from the signal recording surface of No. 3. That is, when it is detected that the second magnetic disk 23 is mounted, the disk rotation drive mechanism 118 rotates the second magnetic disk 23 at a rotation speed of about 3600 rpm. As described above, when the second magnetic disk 23 is rotated at a high speed, the opposing surface of the head slider corresponding to the signal recording surface of the second magnetic disk 23 and the signal recording surface of the second magnetic disk 23 are moved. A convection of air is generated between them, and a so-called air film is formed. Therefore, the head film 121 is lifted by a predetermined amount, about 50 nm, from the signal recording surface of the second magnetic disk 23 by the action of the air film. . Then, on the second magnetic disk 23, recording and reproduction of information signals are performed by the second magnetic head element in a state where the head portions 121, 121 are floated with respect to the signal recording surface.

As shown in FIG. 6, the moving mechanism 117 is provided on the base 105, and supports the main guide shaft 2 for movably supporting the head carriage body 125 of the head mechanism 116.
02 and a slave guide shaft (not shown) and the head 121 of the head mechanism 116 via the head carriage main body 125.
And an electromagnetic drive unit 200 for moving the first and second magnetic disks 121 in the radial direction of the first and second magnetic disks 6 and 23. The electromagnetic driving unit 200 has driving coils 204 and 205 inserted into a yoke of a voice coil motor (not shown).
When a drive current is supplied to the drive coils 204 and 205, the first or second magnetic disks 6, 23 loaded on the disk table 222 are moved in the radial direction.

As shown in FIG. 6, the disk rotation drive mechanism 118 has a spindle motor 220 attached to the base 105 and a tip end of the spindle 221 of the spindle motor 220 so as to rotate integrally with the spindle 221. Disk table 222 provided. A magnet 223 for attracting the hubs 8 and 25 attached to the magnetic disks 6 and 23 is attached to the disk table 222 on the mounting surface side on which the first or second magnetic disks 6 and 23 are mounted. ing. Further, on the mounting surface side of the magnetic disks 6 and 23 of the disk table 222, the drive pins engage with the drive pin engagement holes 8b or the drive pin insertion holes 25b provided in the hubs 8 and 25 at positions eccentric to the spindle 221. Alternatively, a driving pin 224 to be inserted is protruded. The drive pin 224 is connected to the disk table 2
22 is urged toward the outer peripheral side via an urging member such as a tension spring (not shown).

An electronic circuit board 226 on which various electronic circuits, detection switches, and the like are disposed is attached to the lower surface of the base 105. This electronic circuit board 226
As shown in FIG. 6, a disc-in detection switch 227 for detecting whether or not the first or second disc cartridge 5 or 22 is mounted projects an operator to be pushed into the upper side of the base 105 as shown in FIG. It is arranged to be. Further, on the electronic circuit board 226, the erroneous recording prevention holes 16, 3 provided in the first or second disk cartridges 5, 22 are provided.
2 are provided with first or second erroneous recording prevention detection switches 228 and 229 for detecting the open state. As shown in FIG. 6, a disc capacity identification hole 34 provided in the second disc cartridge 22 is provided on the electronic circuit board 226.
Is provided. The disk capacity detection switch 230 detects the capacity of the magnetic disk stored in the disk cartridge by detecting the presence or absence of a disk capacity identification hole provided in the disk cartridge mounted at the cartridge mounting position.

As shown in FIG. 6, the loading mechanism 119 includes a cartridge holder 231 for holding the first or second disk cartridge 5 or 22 loaded from the cartridge insertion / removal slot 110, and a cartridge holder 231 for holding the cartridge.
1 or 1st or 2nd disk cartridge 5, 2
2 has a lifting / lowering operation plate 232 for raising / lowering a cartridge insertion / removal position where the cartridge 2 is inserted / removed and a cartridge mounting position where the cartridge is mounted on the disk table 222 of the disk rotation drive mechanism 118.

The cartridge holder 231 has a cartridge holding portion 235 for holding both sides in the width direction of the first or second disk cartridge 5 or 22 inserted into the apparatus main body 101 on opposite sides. The front side facing the opening 110 and the lower side facing the base 105 are formed in a substantially housing shape that is open. On both sides of the cartridge holder 231, guide pieces 238, 238 that engage with guide grooves 237 formed on the side surface of the base 105 are formed by being cut and raised outward, and through the guide pieces 238, 238. The vertical position with respect to the base 105 is guided. Also, the cartridge holder 231
A support shaft 239 movably supported on the elevating operation plate 232 protrudes outward on both sides of the support shaft 239.

The cartridge holder 231 holds the first or second disk cartridge 5, 22 inserted into the apparatus main body 101 through the cartridge insertion / removal opening 110, and holds the lift operation plate 23 mounted on the base 105.
2, the disc rotation drive mechanism 118 is vertically moved between a cartridge insertion / removal position separated from the disk table 222 and a cartridge mounting position close to the disk table 222 side. The cartridge holder 231 loads the first or second magnetic disk 6, 23 stored in the held first or second disk cartridge 5, 22 onto the disk table 222 or loads the disk onto the disk table 222. The loaded magnetic disks 6 and 23 are unloaded.

Then, on the upper surface side of the base 105, the cartridge holder 231 is located between the base 105 and the cartridge holder 231, and approaches and separates from the disk rotation drive mechanism 118 provided on the base 105. An elevating operation plate 232 for performing an elevating operation in the direction is provided. As shown in the drawing, cam members 241 and 242 having vertical inclined grooves 244 are formed on both sides of the lift operation plate 232 so as to rise. , Support shafts 239 projecting from both sides of the cartridge holder 231 are movably engaged.

[0091] Further, the elevating operation plate 232, by a biasing member, not shown, is moved biased in direction of arrow X ₂ in FIG. On the rear side on the base 105, the lifting operation plate 2 is provided.
When 32 is moved to the rear side in FIG. 6 the direction of arrow X _1,
A lock lever 246 for locking the lifting operation plate 232 at a position moved rearward is provided rotatably.

[0092] Further, on the rear side of the base 105, although not shown, ejecting motor of the eject mechanism for moving the operation in FIG. 6 the arrow X ₁ direction against the urging force of the lifting operation plate 232 by the biasing member Are arranged.

When the first or second disk cartridge 5 or 22 can be inserted into and removed from the apparatus main body 101 through the cartridge insertion / removal opening 110, the lifting / lowering operation plate 232 is driven by an ejection motor as indicated by an arrow in FIG. X ₁ is operated to move direction and is moved to the position of the rear side of the base 105. At this time, the lifting operation plate 232 is
It is locked by 46 and is held at a position moved to the rear side of the base 105. When the lifting operation plate 232 is locked by the lock lever 246, the support shaft 239 of the cartridge holder 231
The two cam pieces 241, 242 are supported on the upper end side of the inclined groove 244, and are held at an elevated position separated from the disk table 222 of the disk rotation drive mechanism 118. When the cartridge holder 231 is held at the raised position, the open end on the front side
10 are located. Here, when the first and second disk cartridges 5 and 22 are inserted into the cartridge holder 231 through the cartridge insertion / removal opening 110, the lock lever 246 moves to the insertion end side of the first or second disk cartridge 5 or 22. To be turned. When the first or second disk cartridge 5, 22 is inserted to a predetermined insertion position in the cartridge holder 231, the lock lever 246 rotates to unlock the lifting operation plate 232. Elevator operation plate 232, the lock by the lock lever 246 is released, in FIG. 6 receives the biasing force of the biasing member is operated to move direction of arrow X _2. When the lifting operation plate 232 is moved in the direction of arrow X ₂ in FIG. 6, the support shaft 239 moves to the lower side along the inclined groove 244 of the cam pieces 241 and 242, the cartridge holder 231 in Fig. 6 the arrow L ₁ direction It is lowered to the disk table 222 side of the base 105 side. The raising / lowering operation plate 232 lowers the cartridge holder 231, thereby causing the first or second disk cartridge 5, 22 held in the cartridge holder 231 to move.
Is positioned at a cartridge mounting position formed on the base 105, and the first or second disk cartridge 5, 22 stored in the first or second disk cartridge 5, 22 stored in the first or second disk cartridge 5, 22 is mounted. The second magnetic disks 6, 23 are loaded on the disk table 222.

At this time, the first or second magnetic disk 6, 23 is inserted through the spindle holes 8a, 25a provided in the hubs 8, 25 with the spindle 221 and the driving pin 224 is inserted into the driving pin engaging hole 8b or the driving pin engaging hole 8b. The hubs 8 and 25 are sucked by the magnet and are placed on the disk table 222 by being engaged or inserted into the pin insertion holes 25b, and are brought into a state of being able to rotate integrally with the disk table 222. Here, when the spindle motor 220 is driven, the first or second magnetic disk 6, 23 is moved to the disk table 22.
2 and is rotated at a rotation speed corresponding to each recording density.

Further, as shown in FIG. 6, when the loading mechanism 119 ejects the lock lever 246 for regulating the position of the elevating operation plate 232 and the first or second disk cartridge 5, 22 from the cartridge mounting position. by depressing the eject button 113, the eject motor is driven to rotate, the lift operation plate 232 is moved in FIG. 6 the direction of arrow X _1. By elevating operation plate 232 is moved in the X ₂ direction in FIG. 6, the cartridge holder 231 while being moved to the cartridge inserting and removing position, the lock lever 246 is rotated, the first or from the cartridge slot 110 The second disk cartridges 5, 22 are ejected.

As described above, the disk drive 1
The head mechanism 116 included in the second arm member 00 includes a support arm 122 having a positioning reference portion 180 having sides 182 and 183 protruding from an outer peripheral portion of the base plate 123 attached to the second portion. The support arm 122 can be easily and reliably positioned relative to the support arm 124. Therefore, according to the head mechanism 116, the position of the head section 121 with respect to the first or second magnetic disk 6, 23 can be positioned with high accuracy.

Further, by positioning each side 181, 182, 183 of the positioning reference portion 180 of the support arm 122 at three points with reference to the positioning reference, and attaching the support arm 122 and the base plate 123 to the arm holding member 124, the arm holding The attachment position to the member 124 can be easily and reliably positioned, and the attachment position of the support arm 122 to the arm holding member 124 can be accurately determined. Therefore, the head unit 1 with respect to the first or second magnetic disk 6, 23
21 can be positioned with high accuracy.

The disk drive device 100 according to the present invention is configured to be applied to the first and second disk cartridges 5 and 22 as an information recording medium. It is needless to say that the present invention may be applied to other disk cartridges such as a magneto-optical disk cartridge, and may be configured as a hard disk device.

[0099]

As described above, according to the magnetic head device of the present invention, when the support arm and the support base are mounted on the base, the mounting position on the base can be easily and reliably determined. . Also, this magnetic head device uses the support arm as a positioning reference,
The accuracy of the mounting position of the support arm with respect to the base can be improved.

Further, according to the method of manufacturing the magnetic head device of the present invention, when the support arm and the support base are mounted on the base, the mounting position on the base can be easily and reliably determined. Further, according to the method of manufacturing the magnetic head device, the mounting position of the support arm with respect to the base can be accurately determined.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a disk drive device according to the present invention.

FIG. 2 is a perspective view showing a first disk cartridge applied to the disk drive device.

FIG. 3 is a plan view showing the first disk cartridge from a bottom surface side.

FIG. 4 is a perspective view showing a second disk cartridge applied to the disk drive device.

FIG. 5 is a plan view showing the second disk cartridge from the bottom side.

FIG. 6 is an exploded perspective view showing the disk drive device.

FIG. 7 is a perspective view showing a head mechanism provided in the disk drive device.

FIG. 8 is a perspective view showing a support arm and a base plate provided in the head mechanism.

FIG. 9 is an exploded perspective view showing a support arm and a base plate provided in the head mechanism.

FIG. 10 is a plan view showing the support arm.

FIG. 11 is a side view for explaining a shape of a first portion of the support arm.

FIG. 12 is a longitudinal sectional view illustrating a bent piece of the support arm.

FIG. 13 is a side view showing another shape of the first portion of the support arm.

FIG. 14 is a side view showing still another shape of the first portion of the support arm.

FIG. 15 is a plan view showing the base plate.

FIG. 16 is a plan view for explaining a positioning reference portion of the base plate.

FIG. 17 is a plan view showing a state where a support arm and a base plate are positioned with respect to an arm holding member in a conventional head mechanism.

[Explanation of symbols]

5 first disk cartridge, 6 first magnetic disk, 22 second disk cartridge, 23 second disk
Magnetic disk, 100 disk drive device, head mechanism, 121 head section, 122 support arm, 12
3 base plate, 124 arm holding member, 180
Positioning reference part

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D059 AA01 BA01 CA02 DA05 DA26 EA12 5D068 AA01 AA02 BB01 CC07 EE18 GG03

Claims (8)

[Claims] A support arm for supporting a head having a magnetic head element; a support base mounted on a base of the support arm; and a base on which the support base is mounted. A magnetic head device, wherein a positioning reference portion for positioning the support arm with respect to a base is formed so as to protrude from an outer peripheral portion of the support base attached to the base. 2. The magnetic head device according to claim 1, wherein the positioning reference portion has a plurality of sides serving as positioning references. 3. The support arm and the support base,
An insertion hole through which a biasing member for biasing a positioning abutting member for positioning the base with respect to the support arm in a direction in which the abutting member abuts on the positioning reference portion is provided. The magnetic head device according to claim 1, wherein 4. The magnetic head according to claim 1, wherein the head unit has a plurality of magnetic head elements for recording and / or reproducing data on and from a disk-shaped recording medium at different recording densities. apparatus. 5. The head unit includes: a first magnetic head element for recording and / or reproducing an information signal in a state in which the head unit is in sliding contact with a disk-shaped recording medium; 2. The magnetic head device according to claim 1, further comprising a second magnetic head element for recording and / or reproducing an information signal. 6. The magnetic head device according to claim 1, wherein the head section is positioned and attached to a desired position with respect to the support arm. 7. A magnetic head device comprising a magnetic head, a support arm for supporting the magnetic head, and a support base holding the support arm and being attached to a base, wherein the support arm is used as a positioning reference. A magnetic head device wherein the magnetic head and the support base are positioned and mounted. 8. A method of manufacturing a magnetic head device, comprising: a support arm for supporting a magnetic head element; a support base mounted on a base of the support arm; and a base on which the support base is mounted. After the support base is attached to the base, the positioning reference portion formed on the support arm, which is formed by projecting from the outer peripheral portion of the support base attached to the base of the support arm, as a positioning reference for the base, A method of manufacturing a magnetic head device, wherein the support base is mounted on the base.