JP3304869B2 - Disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive, and more particularly to a floppy disk drive for writing or reading information on a disk on which a head carriage moves and rotates. 2. Description of the Related Art Conventionally, a floppy disk device has been widely used as an external storage device in a personal computer. In recent years, in order to cope with the future image era, a floppy disk device whose storage capacity is greatly increased from the current 1.44 MB to 200 MB or more is being developed. In order to increase the storage capacity to such a large capacity, the floppy disk drive needs to increase the rotation speed of the floppy disk by more than 10 times from the current 300 RPM, and also increase the track density by more than 10 times from the current 135 TPI. It is necessary to be about 3000 TPI.

In order to stably write or read information under such conditions, the head load pressure of the magnetic head (the pressure at which the magnetic head hits a floppy disk)
Becomes an important matter.

[0003]

2. Description of the Related Art FIGS. 10 and 11 show the structure of a head carriage 11 of a conventional floppy disk drive 10. FIG. The head carriage 11 has a lower magnetic head 12 and an upper magnetic head 13, moves on the frame 14 in the Y1 and Y2 directions, and writes or reads information on a rotating floppy disk 62. Head carriage 11
A head arm 18 fixed to the tip of a leaf spring 17 fixed to the carriage body 16; a lower magnetic head 12 attached to the tip of the carriage body 16; An upper magnetic head 13 attached to the tip, and a head load spring 19 for applying a head load pressure to the upper magnetic head 13
And a structure having: The upper magnetic head 13 is attached to the lower surface at the center of the gimbal 20, and the periphery of the gimbal 20 is attached to the head arm 18.

When the disk cartridge 60 (see FIG. 1) is mounted, the lower magnetic head 12 enters the opening 65 of the cartridge body 61 and comes into contact with the lower surface 62b of the floppy disk 62 as shown in FIG. The upper magnetic head 70 enters the opening 64 of the cartridge main body 61 and comes into contact with the upper surface 62a of the floppy disk 62. FIG.
As shown in FIG. 1, the gimbal 20 has a width A in the X1-X2 direction.
Is 16 mm, the width B of the opening 64 of the cartridge body 61 in the X1-X2 direction is 8.5 mm, and the gimbal 2
0 is larger than the opening 64 of the cartridge main body 61.

[0005]

As shown in FIG.
Since the gimbal 20 is larger than the opening 64 of the cartridge main body 61, the gimbal 20 is located above the cartridge main body 61 and near the upper surface of the cartridge main body 61 with the disk cartridge 60 mounted.

For this reason, when the upper magnetic head 13 vibrates up and down due to an external shock or a follow-up operation to the disk, the gimbal 20 moves the shutter 63 of the disk cartridge 60 or the edge portion of the opening 64 of the cartridge body 61. It can happen that you hit it. Further, when the disk cartridge 60 is mounted, the distance C between the gimbal 20 and the floppy disk 62 is 1.9 mm because the gimbal 20 is located outside the cartridge main body 61, and this distance C And the distance D between the opening 64 and the floppy disk 62 is C> D,
The height dimension E of the upper magnetic head 13 is 1.9 mm,
The upper magnetic head 13 cannot have a low height structure. For this reason, the inertia force of the swing of the upper magnetic head 13 cannot be reduced, and therefore, after the upper magnetic head 13 deforms and tilts the gimbal 20, it does not quickly return to the original state. Has a problem in the follow-up performance with respect to the floppy disk 62. Therefore, it has been difficult to stably write or read information, and the reliability of writing or reading information has been impaired.

Therefore, an object of the present invention is to provide a disk device which solves the above-mentioned problems.

[0008]

[Summary of the invention of claim 1 includes a disc rotating means for rotating and supporting a disc contained in a cartridge having an opening, a possible move to a radial direction of the rotating disk, A head carriage having a gimbal support, and the gimbal of the head carriage
A gimbal attached to the support portion, Yes is supported by the gimbal, it falls within the opening of the cartridge, in the disk apparatus having a magnetic head for writing or reading information with respect to the disc, the upper
The gimbal support of the head carriage is
An opening size smaller than the cartridge, the gimbals
Size is smaller than the cartridge opening.
When writing or reading information,
The gimbal support portion and the gimbal are connected to the cartridge
The magnetic head is inserted into the opening of
It is configured to contact with .

The gimbal support portion and the gimbal can enter the opening of the cartridge, eliminating the restriction that the height of the magnetic head cannot be reduced, and a magnetic head having a small height can be used. Becomes The invention according to claim 2 is the disk according to claim 1.
In click device, the magnetic head having a slider surface
Divided into a slider part and a coil part having a coil.
And the slider and the coil are sandwiched by the gimbal.
A configuration that is combined and Le portion, in the state in which writing or reading of information, in which the upper Symbol slider portion is configured to contact with the surface of the disc.

[0010] The distance from the gimbal to the slider surface of the slider portion is reduced, and the weight of the lower part of the gimbal and the weight of the upper part are balanced. Therefore, after the magnetic head is deformed and tilted by deforming the gimbal, it is possible to return to the original state more quickly, and to realize a disk device excellent in followability of the magnetic head to the disk surface.
Become.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A floppy disk drive according to a first embodiment of the present invention will be described below with reference to the drawings. First, referring to FIGS. 1 and 2A, 2B, and 2C,
The floppy disk device will be schematically described.

The floppy disk drive 50 is of a large capacity type, and includes a frame 51, a turntable motor 52, a turntable 53, and a head carriage 54.
, A voice coil motor 55, a holder 56, a slider 57 also serving as a top plate, and a front bezel 58. X1, X2 are width directions, Y1, Y2 are depth directions, Z
1, Z2 is a height (thickness) direction.

The floppy disk drive 50 uses a disk cartridge 60. The disk cartridge 60 has a floppy disk 62 having a diameter of 3.5 inches housed inside a cartridge main body 61, and has a shutter 63 on an end side of the cartridge main body 61. The shutter 63 is provided with openings 6 on the upper and lower surfaces of the cartridge body 61.
4, 65 are covered. Hub 6 of floppy disk 62
6 is exposed on the lower surface of the cartridge main body 61.

When the disk cartridge 60 is inserted in the Y1 direction from the front bezel 58 side, it enters the holder 56, the shutter 62 slides in the X2 direction, and the
4, 65 is opened. The upper magnetic head 70 faces the opening 64, and the lower magnetic head 71 faces the opening 65. Next, the slider 57 is unlocked and slides in the Y2 direction, and the holder 56 is moved together with the disc cartridge 60 in the Z direction.
It descends in two directions. As a result, the disk cartridge 60 is mounted, the hub 66 of the floppy disk 62 is connected to the turntable 53, and the lower magnetic head 71 relatively enters the opening 65 and comes into contact with the lower surface 62 b of the floppy disk 62. Subsequently, the floppy disk 62 is turned about 3,600 RP by the turntable motor 52.
After rotation at M, the solenoid 201 (see FIG. 2) is excited to operate a head loading mechanism (not shown) to lower the lift arm 202, and the lift arm 202
The upper magnetic head 70 supported by the
4 and land on the upper surface 62a of the floppy disk 62. The head carriage 54 is moved in the Y1 and Y2 directions by the voice coil
Information is written or read by the upper magnetic head 70 and the lower magnetic head 71 which are formed at a track density of about 000 to 3000 and are in a floating state.

When the eject button 13 is pressed, the disc cartridge 60 first moves in the Z1 direction, and then moves in the Y2 direction to be ejected. Next, the head carriage 54 will be described. As shown in FIGS. 3 to 7, the head carriage 54 includes a carriage body 80 having an L-shape in FIG. 6, an upper head arm 81, and a lower magnetic head 71 provided at the tip of the carriage body 80. And the upper magnetic head 70 at the tip of the upper head arm 81 and the X of the carriage body 80.
Hollow frame-shaped drive coil 8 fixed to 1 side and X1 side
2-1 and 82-2, and the frame 51
Guide rods 84 and 85 fixed in parallel to
1, supported movably in the Y2 direction.

The head carriage 54 has a leaf spring 100
Are fixed by a plate 106 fixed to the upper head arm 81, and the upper head arm 81 is fixed to the distal end of the leaf spring 100. The upper magnetic head 70 is supported by a gimbal 101, and the gimbal 101 is fixed to an upper head arm 81. By the spring force of the head load spring 103 which is a torsion coil spring,
The upper head arm 81 is biased, and a head load pressure is applied to the upper magnetic head 70. Gimbal 1
01 has a width F in the X1-X2 direction of 6.6 mm, a width B of the opening 64 in the cartridge body 61 in the X1-X2 direction is 8.5 mm, and the gimbal 101 has an opening in the upper surface of the cartridge body 61. It is smaller than 64.

As shown in FIGS. 8 and 9, the upper magnetic head 70 is divided into a slider 70a incorporating a magnetic core (not shown) and a coil 70b. Are fixed to the lower surface of the gimbal 101 and the coil portion 70b is fixed to the upper surface of the gimbal 101, that is, the slider portion 70a and the coil portion 70b are combined with the gimbal 101 interposed therebetween. The height G of the slider portion 70a is about 0.6 mm, and the height H of the upper magnetic head 70 is 1.88 mm at the maximum.
It is.

On the upper surface of the upper head arm 81, a relay flexible sheet 103 is attached. The relay flexible sheet 103 has a shape corresponding to the shape of the upper head arm 81, has seven wiring patterns (not shown) extending in the Y1 and Y2 directions, and has both ends of each wiring pattern (not shown). Have terminals 103a and 103b. The terminal 103a is exposed to the window 81a of the upper head arm 81, and the terminal 103b is exposed to the window 81b of the upper head arm 81. As shown in FIG. 6, the upper magnetic head 70
The leading end of the lead wire 104 that is drawn out is
3a and solder 107. Terminal 1 at one end
03b connected to the lead wire 10 by solder 108
Reference numeral 5 is fitted in a guide groove 81c formed in a portion of the upper surface of the upper head arm 81 near the base and wired along the guide groove 81c. Solder 107, 108
Are within the thickness t of the upper head arm 81.

The upper magnetic head 70 has a state in which the end of the lead wire 104 is connected to the terminal 103a, that is, the relay magnetic flexible sheet 103 is attached,
The head carriage 54 is handled without being entangled, so that the head carriage 54 is easy to assemble. FIG.
As shown in FIG. 8, a plate 114 (FIG. 3) in which the Y1 end side of the lower suspension 110, which is a leaf spring, is screwed to the carriage body 80 by an arm 80a extending in the Y2 direction of the carriage body 80. Reference). The lower suspension 110 is
It extends in the Y2 direction, and the tip side projects beyond the arm portion 80a. The lower suspension 110 includes a plate spring portion 110a fixed to the plate 114 on the fixed side and a rigid arm portion 110b on the Y2 direction side from the plate spring portion 110a. The leaf spring portion 110a
Two parallel belt-shaped leaf spring portions 110 on both sides in the 1, X2 direction
a1 and 110a2. The rigid arm portion 110b has rib portions 110b1 and 110b2 bent on both sides,
The ribs 110b1 and 110b2 provide rigidity. The lower magnetic head 71 is attached to the rigid arm 110b on the Y2 direction side. The rigid arm 110b is urged by the spring force of the leaf spring 110a, and a head load pressure is applied to the lower magnetic head 71.

As shown in FIG. 8, a lower block 111 is fixed to the rigid arm 110b. The lower magnetic head 71 is supported by the gimbal 112 and the gimbal 1
12 is fixed to the lower block 111. As shown in FIGS. 8 and 9, the lower magnetic head 71 includes a slider portion 71a in which a magnetic core portion (not shown) is incorporated,
And a coil part 71b.
Are fixed to the upper surface of the gimbal 112, and the coil portion 71b is fixed to the lower surface of the gimbal 112. The projection 111 a of the lower block 111 pushes the center of the gimbal 112. Slider part 71a, coil part 71
b is a slider portion 70a of the upper magnetic head 70,
It has the same dimensions as the coil part 70. The gimbal 112 has the same size as the gimbal 101 and is smaller than the opening 65 on the lower surface of the cartridge main body 61. Further, one end of a strip-shaped flexible cable 113 is fixed to the rigid arm 110b. The lead wire drawn from the lower magnetic head 71 is connected to the flexible cable 113. This flexible cable 11
3 is drawn to the X2 side.

FIG. 6 and FIG.
0 indicates a state where information is written or read. In the upper magnetic head 70, the gimbal 101 enters the opening 64, and the slider 70a
Is in contact with the upper surface 62a of the floppy disk 62 or slightly floats.

In the lower magnetic head 71, the gimbal 112 enters the opening 65, and the slider portion 71a is in contact with the lower surface 62b of the floppy disk 62 or slightly floats. In the upper magnetic head 70, the distance from the gimbal 101 to the slider surface of the slider portion 70a is short, and the weight of the lower slider portion 70a of the gimbal 101 and the weight of the upper coil portion 70b are balanced. Therefore, after the upper magnetic head 70 deforms and tilts the gimbal 101, the upper magnetic head 70 is returned to the original state more quickly, and the upper magnetic head 70 has excellent followability with respect to the upper surface 62a of the floppy disk 62. Having.

Since the gimbal 101 is in the opening 64, even when the upper magnetic head 70 vibrates up and down due to an external shock or a follow-up operation to the disk, the gimbal 101 is moved to the edge of the opening 64 of the cartridge body 61 or the like. It doesn't happen. Regarding the lower magnetic head 71,
Since the distance from the gimbal 112 to the slider surface of the slider portion 71a is short, and the weight of the upper slider portion 71a of the gimbal 112 and the weight of the lower coil portion 71b are balanced, the lower magnetic field is reduced. After the head 71 deforms and tilts the gimbal 112, the head returns to the original state more quickly, and has excellent followability to the lower surface 62b of the floppy disk 62 of the lower magnetic head 71.

Since the upper magnetic head 70 and the lower magnetic head 71 have good followability to the floppy disk 62 in this manner, the upper magnetic head 7 which is slightly floating is provided.
0 and the lower magnetic head 71 has a track of 2000
Writing or reading of information at a track density considerably higher than about 3000 TPI is performed with high reliability. Further, since the gimbal 112 enters the opening 65, even when the lower magnetic head 71 vibrates up and down due to an external impact or an operation of following the disk, the gimbal 112 can move along the edge of the opening 65 of the cartridge main body 61. It doesn't happen.

Further, according to the present invention, the magnetic head is not divided into the slider portion and the coil portion as in the above-described embodiment, but the slider portion and the coil portion are integrated magnetic heads, and are formed to be thin. It can also be applied to existing magnetic heads.

[0026]

As described above, according to the first aspect of the present invention,
Since the gimbal support and gimbals are both opened by Rimosho again the size of the cartridge, in the state in which writing or reading of information is configured to gimbal support and the gimbal is within the opening of the cartridge, the information If the magnetic head vibrates up and down due to an external impact or following the disk while writing or reading data, the gimbal support and the gimbal move in and out of the cartridge opening, and the gimbal support
The part and the gimbal can be prevented from hitting the edge of the opening of the cartridge.

Further, since the gimbal support and the gimbal are smaller in size than the opening of the cartridge, when the gimbal support and the gimbal are larger than the opening of the cartridge, the gimbal support and the gimbal are located within the opening of the cartridge. I ca n’t get in, so
Although there was a restriction that the height of the magnetic head could not be made smaller than a predetermined value, the gimbal support
Since the size of the gimbal is smaller than the opening of the cartridge, there is no restriction that the height of the magnetic head cannot be reduced, and a magnetic head having a small height can be used. When a magnetic head having a small height is applied, the distance from the gimbal to the head surface is shortened, and the inertia force of the magnetic head is reduced, so that the magnetic head is deformed to tilt the gimbal. Thereafter, the disk device can be quickly returned to the original state, the magnetic head has excellent followability with respect to the disk surface, and the disk device can be written or read with high reliability.

According to the invention of claim 2, according to claim 1
In the disk drive described above, the magnetic head
Divided into a slider part having a coil and a coil part having a coil.
And the slider and coil are
A configuration that is combined, in a state of writing or reading information, for the slider unit is configured to contact with the surface of the disk, the gimbal the slider portion Sula
The distance to the surface of the gimbal is shortened, and the weight of the lower part of the gimbal and the weight of the upper part are balanced, so that the magnetic head deforms the gimbal and tilts to the original state. return to takes place more quickly, can realize a disk apparatus which is excellent in followability to the disk surface of the magnetic head, thus, come out realized disk apparatus writing or reading of information is performed reliably.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a floppy disk drive according to one embodiment of the present invention.

FIG. 2 is a diagram showing a floppy disk drive according to one embodiment of the present invention.

FIG. 3 is an exploded perspective view of a head carriage and a voice coil motor.

FIG. 4 is a plan view of a head carriage and a voice coil motor.

FIG. 5 is a sectional view taken along line VV in FIG.

FIG. 6 is a sectional view taken along the line VI-VI in FIG.

FIG. 7 is a bottom view of the head arm.

FIG. 8 is an exploded perspective view showing an exploded portion of a lower magnetic head and an upper magnetic head on the distal end side of a head carriage.

FIG. 9 is a diagram showing a state in which the lower magnetic head and the upper magnetic head enter the opening of the cartridge body and are in contact with the floppy disk.

FIG. 10 is a diagram showing a conventional example.

FIG. 11 is a diagram showing a relationship between a lower magnetic head, an upper magnetic head, and a cartridge.

[Explanation of symbols]

 Reference Signs List 50 floppy disk device 51 frame 52 turntable motor 53 turntable 54 head carriage 55 voice coil motor 56 holder 57 slider 60 disk cartridge 61 cartridge body 62 floppy disk 63 shutter 64, 65 opening 70 upper magnetic head 70a slider portion 70b coil portion 71 Lower magnetic head 71a Slider part 71b Coil part 80 Carriage main body 80a1 Stopper part 81 Upper head arm 82-1, 82-2 Drive coil 84, 85 Guide rod 101, 112 Gimbal 110 Lower suspension 115 Head load pressure adjustment lever

Continuing on the front page (72) Inventor Kazuhiko Yasuda 3-7-3 Nakamachi, Musashino-shi, Tokyo TEAC Corporation (72) Inventor Kazuo Yokota 3-73-3 Nakamachi, Musashino-shi, Tokyo TEAC Corporation (56) References JP-A-62-165721 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 17/32 G11B 5/48

Claims (2)

(57) [Claims] 1. A cartridge housed in a cartridge having an opening.
Disk rotating means for supporting and rotating the disc, and moving in the radial direction of the rotating disc.Movable and jimba
With supportA head carriage,Attached to the gimbal support of the head carriage
Gimbal and the above Gimbal supportedThereAbove the cartridge
Write information into the disc by entering the opening
Disk device having a magnetic head for performing reading or reading
In placeThe gimbal support of the head carriage is
It is smaller than the ridge opening, The gimbal is smaller than the cartridge opening
Size When writing or reading information,
The valve support and the gimbal open the cartridge.
Once inside the mouth, the magnetic head contacts the surface of the disk.
Configuration to touch A disk device, characterized in that: (2)The disk device according to claim 1,
hand, The magnetic head includes a coil having a slider portion and a coil.
The gimbal is sandwiched between
In this configuration, the iron part and the coil part are combined.
And  When writing or reading informationAboveSura
That the lid part is in contact with the disk surface
Characteristic disk device.