JP2001118352A - Mass floppy disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely adjust the matching height of a pair of magnetic heads in accordance with a floppy disk. SOLUTION: The upper suspension 182 of an upper magnetic head 101 is attached vertically to a head carriage 111 through an upper base arm 180 in a freely rotatable way, a return coil spring 189 performs rotational energization downward, the lower suspension 183 of a lower magnetic head 102 is fixed to the carriage 111, and the arm 180 is subjected to height adjustment with respect to the carriage 111 by a height adjust screw 274 so that the matching height of the pair of magnetic heads 101 and 102 can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a large-capacity disk drive apparatus which is most suitable for recording and / or reproducing large-capacity (high-density) data on a floppy disk. It belongs to the technical field related to adjustment height.

[0002]

2. Description of the Related Art Conventionally, a small-capacity floppy disk drive having a recording capacity of 1 to 2 MB uses a small-capacity floppy disk cartridge. Then, the small-capacity floppy disk cartridge is loaded, the center core of the floppy disk is chucked on the disk table relatively inserted into the center core hole of the cartridge, and the floppy disk is moved to 200 to 200 mm by the spindle motor. 250rpm
Drive at low speed. Then, a pair of upper and lower magnetic heads are inserted into a pair of head insertion holes of the disk cartridge opened at the time of loading, and are brought into contact with both upper and lower surfaces of the floppy disk. Data is recorded and / or reproduced on a floppy disk while seeking and tracking along a scanning center, which is radiation from the center of the disk.

On the other hand, the applicant of the present invention has proposed that the recording capacity be 10
We have already developed a large-capacity floppy disk cartridge that has increased to more than 0 MB. In this large-capacity floppy disk cartridge, a pair of upper and lower magnetic heads composed of flying heads are floated on the upper and lower surfaces of the floppy disk by an air film in micron order while rotating the floppy disk at a high speed of 3600 rpm or more ( High-density recording and / or reproduction of data in a flying state. Therefore, the floppy disk used for the large-capacity floppy disk cartridge is designed to improve the surface roughness of the head and the floppy disk to improve the hitting with the head in order to increase the rotation speed and reduce the data track width by high-density recording. It is necessary to reduce the thickness of the magnetic layer. In order to reduce the thickness of the magnetic layer, it is necessary to reduce the size of the magnetic powder to 0.1 μm and the thickness of the coating to about 0.2 μm.

In a conventional small-capacity floppy disk drive, a small-capacity floppy disk cartridge is inserted into a cartridge holder, and when the lock of the cartridge holder by a trigger lever is released, the small-capacity floppy disk is used by the cartridge holder. The disk cartridge is rapidly loaded from the unloading position, which is the ascending position, to the loading position, which is the descending position, and the floppy disk is chucked on the disk table. Landing (installation). However, since the magnetic layer of the floppy disk of a small-capacity floppy disk cartridge is very thick, even if a pair of upper and lower magnetic heads are impacted on both upper and lower surfaces of the floppy disk, the magnetic There was no worry about the layers being severely damaged and there were no particular safety issues.
However, a floppy disk in which the recording capacity of a large-capacity floppy disk cartridge has been increased to 100 MB or more has a very thin magnetic layer. If the magnetic layer is impacted on both the upper and lower surfaces, the magnetic layer having a small film thickness will be greatly damaged, resulting in serious problems in quality and durability.

Therefore, the inventor of the present invention has previously developed a large-capacity floppy disk drive equipped with a head elevating mechanism for softly landing a head on a floppy disk, and has already filed an application. A large-capacity floppy disk drive equipped with this head lifting mechanism first supports a pair of upper and lower magnetic heads at the tips of a pair of upper and lower suspensions composed of leaf springs, and moves the upper and lower magnetic heads by the spring force of the pair of upper and lower suspensions. The pair of magnetic heads are moved and biased in a direction of contacting the upper and lower surfaces of the floppy disk. Then, a pair of upper and lower suspensions is closed by a head lifting mechanism mounted on the chassis from an open position where the suspension is pushed upward and downward on the floppy disk to a closed position against the spring force of the floppy disk. By moving the magnetic head to the closed position approaching the upper and lower surfaces of the floppy disk, the pair of upper and lower magnetic heads at the tips of the upper and lower suspensions can be softly landed on the upper and lower surfaces of the floppy disk in a non-impact manner. I have.

At this time, generally, the lower suspension is fixed to the head carriage and the height of the lower magnetic head is set to the reference height position, while the upper suspension is moved to the head via the head arm. The head arm is rotatably mounted on the carriage in a vertical direction, and the head arm is rotationally urged downward by a rotational urging means such as a torsion coil spring. The lower magnetic head is softly landed on the upper surface of the floppy disk while the lower magnetic head receives the lower surface of the floppy disk at the reference height from below. In addition,
The pair of upper and lower head assemblies, which form a pair of upper and lower magnetic heads attached to the tips of a pair of upper and lower suspensions, are vertically symmetrical and have a hollow head base suspension fixed to the tip of the suspension. The outer periphery of the gimbal plate composed of a thin leaf spring is fixed to the surface opposite to the side, and the head chip slider is fixed to the center of the outer surface of the gimbal plate,
The back core and coil are fixed to the back of the head chip slider and placed inside the gimbal plate, and the pivot formed integrally inside the head base supports the center position of the head chip slider from inside the gimbal plate. Thus, a so-called flying head is formed.

[0007]

However, in the large-capacity floppy disk drive developed earlier, a method of sandwiching the floppy disk from the upper side with the upper magnetic head on the lower magnetic head set at the reference height position. When the height of the lower magnetic head is deviated due to the deviation of the mounting angle (elevation angle) of the lower suspension with respect to the head carriage due to the adoption of The height of the magnetic head also shifts following the height shift of the lower magnetic head. If the height deviation of the lower magnetic head is extreme, the large-capacity floppy disk is sandwiched between a pair of upper and lower magnetic heads in a state where it is forcibly deformed. As a result, the posture of the pair of upper and lower magnetic heads deteriorates, and the hitting property of the pair of upper and lower magnetic heads against the large-capacity floppy disk deteriorates. The edge of one of the head bases of the pair of upper and lower magnetic heads may come into contact with the thinned magnetic layer of the large-capacity floppy disk, easily damaging the magnetic layer and destroying the data. There is a new problem that serious accidents are likely to occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and does not adjust the height of the floppy disk to the height of the floppy disk, but adjusts the height of the magnetic head to the height of the floppy disk. It is an object of the present invention to provide a large-capacity floppy disk drive which can be used with a computer.

[0009]

According to the present invention, there is provided a large-capacity floppy disk drive for achieving the above object.
One magnetic head of a pair of magnetic heads contacting both sides of the large-capacity floppy disk is attached to the tip of one suspension rotatably attached to the head carriage, and the other magnetic head is fixed to the head carriage. Attached to the tip of the suspension
In a large-capacity floppy disk drive configured to rotationally bias one suspension toward the large-capacity floppy disk to a position substantially symmetrical to the other suspension with respect to the large-capacity floppy disk by the rotational biasing means, A height adjusting mechanism for adjusting the height with respect to the capacity floppy disk together with the rotation urging means is provided.

In the large-capacity floppy disk drive of the present invention constructed as described above, one magnetic head is attached to the tip of one suspension rotatably mounted on a head carriage, and one of the suspensions has a large capacity. Along with the rotation urging means for energizing the floppy disk, a height adjusting mechanism for adjusting the height of one of the suspensions is provided. The height of one magnetic head attached to the tip of the head and the other magnetic head attached to the tip of the other suspension fixed to the head carriage is adjusted according to the height of the large-capacity floppy disk. It can be adjusted freely.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a large-capacity floppy disk drive to which the present invention is applied will be described below in the following order with reference to the drawings. (1) Description of head carriage assembly structure (2) Description of height adjustment mechanism and attitude stabilization mechanism of magnetic head (3) Description of head assembly structure (4) Large capacity Outline explanation of floppy disk drive (5) ・ ・ ・ explanation of linear actuator (6) ・ ・ ・ explanation of guide spindle mounting device (7) ・ ・ ・ explanation of rotary head lifting mechanism (8) ・ ・ ・ latch Description of mechanism (9) ··· Explanation of carriage lock mechanism (10) ··· Explanation of operation of rotary head elevating mechanism (11) ··· Explanation of head attitude control mechanism at the time of head loading (12) ··· Operation mode Description

(1) Description of the head carriage assembly structure First, as shown in FIGS. 57 to 59, a large-capacity floppy disk drive HFDD to be described later is composed of a pair of upper and lower magnetic heads 101 composed of a flying head. 102 is attached to a head carriage 111 by a head carriage assembly structure 110, and the head carriage assembly structure 110 is configured as follows. That is, the head carriage assembly structure 1
The head carriage 111 is formed of a rigid member made of a light metal such as synthetic resin, aluminum, or magnesium, and a pair of upper and lower magnetic heads 101 and 102 formed by a flying head is provided via a pair of upper and lower head arms 112 and 113. The head carriage 111 is attached to the front end. The pair of upper and lower head arms 112 and 113 are composed of arm bases 180 and 181 made of a rigid member made of a light metal such as synthetic resin, aluminum, or magnesium, which are molded parts, and an elastic member such as a thin leaf spring. Suspension 182, 1
83. Then, suspensions 182, 183 are attached to the tips of the arm bases 180, 181, respectively.
Are integrally connected by a screw fixing method, integral molding by outsert molding, or the like. Then, suspensions 182, 18 of a pair of upper and lower head arms 112, 113 are provided.
A pair of upper and lower head bases 18 are provided on the upper and lower opposing surfaces of
A pair of upper and lower head bases 184 and 185 are bonded to the upper and lower opposing surfaces of the pair of upper and lower head bases 184 and 185 via a gimbal plate to be described later. The length of the arm bases 180 and 181 of the pair of upper and lower head arms 112 and 113 is set to be at least １ ／ of the total length of the head arms 112 and 113. Then, as described later, the large-capacity floppy disk cartridge HFDC and the small-capacity floppy disk cartridge FDC are connected to the large-capacity floppy disk drive HF.
When the DD is selectively loaded and unloaded in the directions of arrows u and g and in the directions of arrows h and b, there is almost no need to move the lower magnetic head 102 up and down.
The arm base 181 of the lower head arm 113 supporting the lower magnetic head 102 is attached to the head carriage 1.
11 or can be fixed with screws or the like. However, when a large-capacity floppy disk cartridge HFDC or a small-capacity floppy disk cartridge FDC is loaded and unloaded into the large-capacity floppy disk drive HFDD in the directions of arrows a, g and h, b, The arm base 101 needs to be moved up and down so as not to interfere with the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC, so that the arm base of the upper head arm 112 supporting the upper magnetic head 101 is required. A leaf spring 187 forming a rotary hinge is provided on an upper head arm mount 186 in which the heads 180 and 181 are integrally formed with the head carriage 111.
To be rotatable in the directions of arrows e and f, which are vertical directions.

The arm base 180 of the upper head arm 112 is centered on the leaf spring 187 and the like by a torsion coil spring 189, which is a rotation urging means, mounted on the upper magnetic head mounting base 186 via a spring mounting plate 188. The upper head arm mounting base 186 is urged to rotate in the direction of arrow f, which is the lower side. At this time, the arm base 180 of the upper head arm 112 is moved to the horizontal reference position where the arm base 180 comes into contact with a horizontal reference base 190 which is an arm receiving stand integrally formed on the front side of the upper end of the upper head arm mounting base 186. It is configured to be urged to rotate in the f direction. .

A pair of left and right slide arms 191 are integrally formed on the left and right sides of the front end (upper magnetic head 101 side) of the arm base 181 of the upper head arm 112. As shown in FIG. The slide arm 191 is mounted on the top plate 5 of the cartridge holder 56.
Arrow a at the top of the left and right side edges of the head insertion opening 73 cut out along the scanning center P ₂ in the central portion of the rear end side of the 6a, is slidably mounted in the direction b.

Therefore, this large-capacity floppy disk
According to the drive HFDD, a large capacity floppy disk cartridge HFDC and a small capacity floppy disk
The unloading state of the cartridge FDC, as described later, the cartridge holder 56 when it is raised in the arrow h direction to the unloading position P ₁₃ shown in FIG. 50, a pair of left and right upper head arm 112 by the cartridge holder 56 Since the slide arm 191 is pushed up in the direction of arrow h, as shown in FIG. 58, the arm base 180 of the upper head arm 112 rotates upward in the direction of arrow e against the torsion coil spring 189 around a pair of left and right fulcrum pins 187. Then, the upper suspension 182 and the upper magnetic head 101 are moved up and down in the directions of arrows a and b, and are moved in the direction of arrow f to an upper retreat position which is a high position where they do not interfere with the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC. Rise to It is. Also, the lower magnetic head 102
Is a large capacity floppy disk cartridge H from the beginning
FDC and small capacity floppy disk cartridge FD
It is set at a low position where it does not interfere with C.

[0016] Next, in the loading completion state of the high capacity floppy disk cartridge HFDC and low-capacity floppy disk cartridge FDC, being lowered in the direction of the arrow g cartridge holder 56 to the loading position P ₁₄ shown in FIG. 51, first, As shown in FIG. 59, the lower magnetic head 102 is mounted on a large-capacity floppy disk cartridge HFDC or a small-capacity floppy disk cartridge.
The cartridge FDC is inserted into the lower head insertion hole 7 from below and comes into contact with the lower surfaces of the floppy disks 1. When the cartridge holder 56 is lowered in the direction of the arrow g to the loading position P _14, lowered in the direction of arrow g the cartridge holder 56 to a position lower than the lowermost position of the pair of left and right slide arms 191 of the upper head arm 112 Is done. Then, as shown in FIG. 59, the arm base 180 of the upper head arm 112 is rotated down in the direction of arrow f by the torsion coil spring 189 about the pair of left and right fulcrum pins 187, and the horizontal reference base of the upper magnetic head mounting base 186 is rotated. 190
It is abutted on and stabilized. That is, at this time, the upper suspension 182 and the upper magnetic head 101 move from the upper retreat position shown in FIG. 58 to the lower position shown in FIG.
Down in the direction. Then, the upper magnetic head 10 is moved by the upper suspension 182 of the upper head arm 112.
1 is a large capacity floppy disk cartridge HFDC
It is configured to be inserted into the upper head insertion hole 7 of the small-capacity floppy disk cartridge FDC from above and to contact the upper surfaces of the floppy disks 1.

According to the head carriage assembly structure 110 thus constructed, the pair of upper and lower suspensions 18 when the pair of upper and lower magnetic heads 101 and 102 are in contact with the upper and lower surfaces of the floppy disk 1 are arranged.
By controlling the height, parallelism, and flatness of the floppy disk 2 and 183 with respect to the floppy disk 1 with high precision as described later, the upper and lower suspensions 182 and 183 almost generate unstable elements such as twisting and twisting. Can not be. Therefore, in particular, the floppy disk 1 of the large-capacity floppy disk cartridge HFDC is
By rotating and driving at a high speed of 00 rpm or more, a pair of upper and lower magnetic heads 101 and 102 are levitated from both upper and lower surfaces of the floppy disk 1 by an air film to obtain 100 MB.
When recording and / or reproducing the above-mentioned large-capacity data at high density, the pair of upper and lower magnetic heads 10 is balanced by the spring load of the pair of upper and lower suspensions 182 and 183.
The magnetic heads 1 and 102 can be floated at a stable height with respect to the upper and lower surfaces of the floppy disk 1, and no irregular rolling phenomenon occurs in these magnetic heads 101 and 102. Nevertheless, the pair of upper and lower magnetic heads 101, 10
2 can follow smoothly, so that high-density recording and / or reproduction of data can always be performed stably. The lower head arm 113 can also be attached to the head carriage 111 so as to be rotatable in the vertical direction (directions of arrows e and f), similarly to the upper head arm 112.

(2) Description of the Height Adjusting Mechanism and Attitude Stabilizing Mechanism of the Magnetic Head Next, as shown in FIGS. 1 to 11, the head carriage assembly structure 110 of the large-capacity floppy disk drive HFDD will be described. A height adjusting mechanism 270 of the upper magnetic head 101, which is one of the magnetic heads, and a posture stabilizing mechanism 290 of the upper magnetic head 101 are incorporated. Note that the other magnetic head is the lower magnetic head 102, and one arm base and one suspension are the upper arm base 180 and the upper suspension 182.
And the other arm base and the other suspension are the lower arm base 181 and the lower suspension 18.
3.

The height adjusting mechanism 2 shown in FIGS.
The first embodiment of the first embodiment 70
The rear end of the upper arm base 180 (the end opposite to the suspension 182 side) is moved by a single leaf spring 187 constituting a rotating hinge to the head carriage 111.
Are mounted on an upper head arm mounting base 186, which is an arm receiving base, so as to be rotatable in the directions of arrows e and f, which are vertical directions. At this time, when the spring mounting plate 188 formed by pressing a sheet metal or the like is horizontally fixed on the upper head arm mounting base 186 of the head carriage 111 by the set screw 271, the spring mounting plate 188 and the upper head arm The rear end of the leaf spring 187 is sandwiched between the mounting base 186 and fixed horizontally, and the leaf spring 187 and the spring mounting plate 188 are fixed by a pair of left and right positioning pins 272 and positioning holes 273. The plate spring 187 is positioned with high accuracy on the upper head arm mounting base 186, and is positioned with high accuracy on the scanning center P ₂ which is the center of the upper arm base 180.
The torsion coil spring mounting portion 188a which is pressed into the upper portion of the front end side of the spring mounting plate 188 is at right angles with respect to the scanning center P _2, and be arranged in a vertical shape, the torsion coil spring mounting portion 188a substantially U-shaped spring engaging portion movable end 189a of the torsion coil spring 189 is rotated biasing means attached by inserting the horizontally is integrally molded onto the scanning center P ₂ on the upper surface of the upper arm base 180 to the outer periphery 180a. The fixed end 189a of the torsion coil spring 189
Is locked by a spring locking portion 188b which is vertically pressed at the upper end on the rear end side of the spring mounting plate 188. The movable arm 189a of the torsion coil spring 189 pushes the upper arm base 180 downward in the direction of arrow f, so that the upper arm base 180 is moved against the head carriage 111 in the direction of arrow f around the leaf spring 187. And is abutted on a horizontal reference table 190 to be horizontally positioned at a horizontal position, that is, a position substantially symmetric with the lower arm base 181 with the floppy disk 1 interposed therebetween.

The height adjusting mechanism 2 shown in FIGS.
First embodiment of 70, a height adjustment screw 274 is configured for single, vertically on the scanning center P ₂ at substantially the center position of the height adjustment screw 274 in this one the upper arm base 180 One female screw hole formed to penetrate (refers to a hole with a female screw tapped on the inner peripheral surface)
275 is screwed downward in a state penetrating vertically. The height adjusting screw 274 is formed as a straight screw having a hexagonal wrench fitting hole 276 formed on the upper end surface. Is abutted vertically.

It should be noted that the first of a posture stabilizing mechanism 290 described later
Of According to the embodiment, the scanning center P ₂ parallel to the pair of left and right link lever 291 to the left and right positions on both sides of the rear end of the upper arm base 180 is not formed integrally with the horizontal form, these link lever 291 downward projections are right and left pair of integrally molded on the lower surface of the rear end 292 and 293 are disposed in positions distributed to the left and right with respect to the scanning center P _2. The pair of left and right projections 29
Reference numerals 2 and 293 denote horizontal reference tables 19 of the head carriage 111.
At 0, it is configured to be in contact with a pair of left and right projection support portions 294 and 295 which are horizontally formed integrally on the right and left sides of the height adjustment screw 274 and the spring mounting plate 188 at substantially the right and left sides. . The downwardly directed tip of the pair of left and right protrusions 292, 293 is formed in a spherical or arc shape.

As shown in FIG. 2, the pair of upper and lower suspensions 182 and 183 of the head carriage assembly 110 are made of an elastic member such as a thin leaf spring. Then, the tips 182a, 183 of the pair of upper and lower suspensions 182, 183.
a pair of upper and lower magnetic heads 101 and 102
And a pair of upper and lower suspensions 1
82 and 183 are a pair of upper and lower arm bases 1 by rear ends 182b and 183b opposite to the front ends 182a and 183a.
80 and 181 are fixed to the upper and lower opposing surfaces at positions closer to the tip side by bonding, screwing, or the like. A rear end 182 of the pair of upper and lower suspensions 182, 183
B, 183b are formed at upper and lower opposing positions on the front side of the upper and lower symmetric bending points 182c, 183c. The spring loads F1 and F2 in the directions are given in advance as initial stresses. That is, the upper suspension 182 has the bending point 18
A spring load F1 for urging the tip 182a downward about the center 2c is applied in advance, and the lower suspension 18
A spring load F2 for urging the distal end 183a upward about the bending point 183c is applied to 3 in advance.

According to the first embodiment of the height adjusting mechanism 270 and the posture stabilizing mechanism 290, as shown in FIG.
The plate spring 187 of FIG.
8, when it is mounted horizontally on the upper head arm mounting base 186 of the head carriage 111, one height adjustment screw 274 and two projections 292, 293 are located above the center position of the horizontal reference base 190 of the head carriage 111. , And comes into contact with a total of three points on the projection support portions 294 and 295 distributed to the left and right with respect to the center position. The movable end 189a of the torsion coil spring 189 attached to the spring attachment plate 188 allows the upper arm base 1
By pressing 80 in the direction of arrow f, the upper arm base 180 is pressed on the horizontal reference base 190 at the above three points and is stably supported horizontally.

Then, as will be described later, a large-capacity floppy disk cartridge HFDC or the like is selectively loaded into the large-capacity floppy disk drive HFDD, and is vertically moved with respect to the floppy disk 1 constituted by the large-capacity floppy disk HFD. When the soft landing operation of the pair of magnetic heads 101 and 102 is performed, as shown in FIG.
1 and 102 are brought into contact with the upper and lower surfaces of the floppy disk 1. At this time, a pair of upper and lower suspensions 182, 18
3 are bent at points 182c, 18
The upper and lower suspensions 182 and 183 are bent in the directions indicated by arrows e ₁ and e ₂ , which are opposite to each other, about the center 3c.
Arrow f _1, f ₂ direction of the spring load F1, the upper and lower pair of the magnetic heads 101, 102 by F2 is to be in contact with the upper and lower surfaces of the floppy disk 1. At this time, the pair of upper and lower magnetic heads 1 is determined by the balance between the spring loads F1 and F2 of the pair of upper and lower suspensions 182 and 183.
The combined height H1 of 01 and 102 will be determined.

Therefore, in the first embodiment of the height adjusting mechanism 270, as shown in FIG. 5, one height adjusting screw 274 is rotated clockwise by a hexagon wrench or the like (in the direction of arrow X1).
And adjust the height adjustment screw 274 to the female screw hole 2
75, the upper arm base 180
Is rotated and adjusted in the direction of arrow e, which is the upper side, against the movable end 189a of the torsion coil spring 189 with the pair of left and right protrusions 292, 293 as fulcrums. Then, the tip 182 of the upper suspension 182 is moved by the upper arm base 180.
a side lifted the arrow e ₁ direction, the spring load F1 of the arrow f ₁ direction of the upper suspension 182 is lowered, the upper magnetic head 101 is moved in the arrow e ₁ direction.
Then, the collapsed balance spring load F1, F2 of the pair of upper and lower suspensions 182 and 183, the tip 183a side of the lower suspension 183 is lifted in the direction of arrow f ₂ is the upper side by the spring force F2, the lower magnetic head 102 moves into the direction of arrow f _2, the combined height H2 of the pair of upper and lower magnetic heads 101, 102 is shifted from the initial combined height H1 shown in FIG. 3 upward, the combined height H2 at that time + Α higher.

On the other hand, as shown in FIG. 6, one height adjustment screw 274 is rotated and adjusted to the left (in the direction of arrow X2).
When the height adjustment screw 274 is pulled upward in the female screw hole 275, the upper arm base 180 is raised.
The movable end 189 of the torsion coil spring 189 around the fulcrum 93
The rotation is adjusted in the direction of arrow f, which is the lower side, by a.
Then, the movement by the upper arm base 180 distal 182a side of the upper suspension 182 is pushed down in the arrow f ₁ direction of arrow f ₁ direction of the spring load F1 of the upper suspension 182 is increased its, upper magnetic head 101 in the arrow f ₁ direction I do. Then, balancing is collapsed spring loaded F1, F2 of the pair of upper and lower suspensions 182 and 183, the upper magnetic head 101 is to push down the lower magnetic head 102 in the arrow e ₂ direction, which is the lower side, the lower suspension 183 pushed down in the arrow e ₂ forward end 183a is against the spring loading F2, lower magnetic head 1
02 moves in the arrow e ₂ directions, combined height H3 of the upper and lower pair of magnetic heads 101 and 102 is shifted from the initial combined height position H1 shown in FIG. 3 downward, combined height when the H3 Is lower by -α.

Thus, one height adjusting screw 27
4 can be freely adjusted in the vertical direction according to the height of the floppy disk 1 by simply adjusting the clockwise or counterclockwise rotation of the pair 4 so that the height H1 of the pair of upper and lower magnetic heads 101 and 102 can be freely adjusted in the vertical direction. The lowering of the output due to the extreme change in the height of the pair of upper and lower magnetic heads 101 and 102 relative to the height of the magnetic head 1 and the damage to the thinned magnetic layer of the floppy disk 1 are prevented beforehand. Can be prevented. As will be described later, the head chip sliders of the pair of upper and lower magnetic heads 101 and 102 are attached to the head bases 184 and 185 via gimbal plates, respectively. , The head chip sliders of the pair of upper and lower magnetic heads 101 and 102 can be aligned in parallel while always maintaining a horizontal attitude by the gimbal plate. .

Next, FIGS. 7 and 8 show the height adjusting mechanism 27.
FIG. 9 shows a second embodiment of the present invention, in which the rear end of the upper arm base 180 is rotatably mounted on the upper head arm mounting base 186 of the head carriage 111 according to the first embodiment. instead of the leaf spring 187 described in embodiment, the support pin 277 of the pair on the left and right side surfaces of the rear end of the upper arm base 180 in the same center state, and, at right angles horizontal manner with respect to the scanning center P ₂ The pair of left and right fulcrum pins 277 are integrally formed and rotatably fitted into a pair of left and right V-shaped grooves 278 integrally formed at upper end positions on both right and left sides of the upper head arm mounting base 186. A pair of left and right fulcrum pins 277 fixed to the upper ends on both left and right sides of the 186 are configured to press the pair of left and right fulcrum pins 277 from above. . In this case as well, the rotation of one height adjustment screw 274 to the right (in the direction of arrow X1) or the left (in the direction of arrow X2) is adjusted so that, similarly to the first embodiment, the upper arm base 180 is rotated. Is adjusted in the vertical direction (directions of arrows e and f) about a pair of left and right fulcrum pins 277 so that a pair of upper and lower magnetic heads 101 and 102 are adjusted.
Can be freely adjusted up and down.

FIG. 9 shows a third embodiment of the height adjusting mechanism 270. In this case, two upper and lower female screw holes 280 and 281 are formed in the upper arm base 180. _{The two} female screw holes 280 and 281 are provided with two height adjusting screws 282 and 282, respectively.
83 and threaded into the head carriage 111
Is abutted on the horizontal reference table 190 of FIG. In this case, two height adjusting screws 282 and 283 are used.
Are simultaneously rotated to the same direction, that is, clockwise and counterclockwise, so that the upper arm base 180 is rotated and adjusted in the vertical direction in the same manner as in the first embodiment, so that the pair of upper and lower magnetic heads 101 and 102 are aligned. The height H1 can be freely adjusted in the vertical direction. If the two height adjustment screws 282 and 283 are rotationally adjusted in opposite directions, the upper arm base 180 is opposed to the leaf spring 187 in a direction perpendicular to the directions of the arrows a and b, which are the seek directions. Since the tilt can be adjusted in the directions of arrows c and d, the pair of upper and lower magnetic heads 101 and 102 can be adjusted in the left and right directions (arrows c and d).
The inclination direction can be freely adjusted. However, in this case, two height adjusting screws 2
The posture of the pair of upper and lower magnetic heads 101 and 102 is determined by a total of three points of either 82 or 283 or one of the two protrusions 292 and 293.

Next, FIG. 10 shows a fourth example of the height adjusting mechanism 270.
In this case, the third embodiment is shown.
1 of the embodiment further has an evolution, instead of using the two height adjusting screws 282 and 283, the projections 292 and the projections supporting portion 294 on the scanning center P ₂ of
And a pair of upper and lower magnetic heads 1 with a total of three points of two height adjusting screws 282 and 283 and one projection 292.
01 and 102 can be determined.

FIG. 11 shows a fifth example of the height adjusting mechanism 270.
Merely indicate embodiment, in this case, the upper arm base 180 and a point on the scanning center P ₂ of the three to a total of three points of the two points allocated to the right and left female screw hole 284, 285, 286 are formed to penetrate vertically, and three height adjusting screws 287, 288, 289
Are screwed into these three female screw holes 284, 285, 286 so as to penetrate vertically, and are brought into contact with the horizontal reference table 190 of the head carriage 111.

[0032] Therefore, in this case, it is rotated adjusting the right rotation or left rotation of one height adjustment screw 287 on the scanning center P ₂ of the three height adjusting screws 287,288,289 Thus, similarly to the first embodiment, the upper arm base 180 is adjusted to rotate in the vertical direction, and the height H of the pair of upper and lower magnetic heads 101 and 102 is adjusted.
1 can be freely adjusted in the vertical direction. And
By rotating and adjusting the three height adjusting screws 287, 288, and 289, the upper arm base 180 is moved against the leaf spring 187 in the directions indicated by arrows a and b, which are seek directions, and in a direction perpendicular thereto. Since the inclination can be adjusted in the three-dimensional direction which is the combined direction of the certain arrows c and d, it is possible to adjust the inclination of the pair of upper and lower magnetic heads 101 and 102 in the three-dimensional direction. In this case, the postures of the pair of upper and lower magnetic heads 101 and 102 can be determined by the three height adjusting screws 287, 288 and 289. Can be omitted. In the case of the three-point support system shown in FIGS. 10 and 11, a pair of left and right
It is preferable to dispose them left and right with respect to ₂ .

Then, as shown in FIGS. 9, 10 and 11, a pair of upper and lower members are used by using two height adjusting screws 282, 283 and three height adjusting screws 287, 288, 289. In the case where the horizontal and three-dimensional inclinations can be adjusted in addition to the height adjustment of the alignment height H1 of the magnetic heads 101 and 102, a pair of upper and lower magnetic heads 101 and 1 are provided.
This is very effective for a tilt that cannot be handled even by a gimbal plate of a head chip slider described later in No. 02, and is effective even when the gimbal plate is abolished.

Next, the posture stabilizing mechanism 290 will be described with reference to FIGS. 1 to 6 and FIGS. That is, FIG.
As shown in FIG. 2, as described in the first embodiment of the height adjustment mechanism 270 described above, the upper arm base 180 is brought into contact with the horizontal reference table 190 of the head carriage 111 with one height adjustment screw 274. In the case of contact, when the point of action of the pressing force F3 for pressing the upper arm base 180 downward by the movable end 189a of the torsion coil spring 189 is shifted from directly above one height adjusting screw 274 to the rear side or the like. The upper arm base 180 is acted upon by a rotational force in the direction of the arrow f, which is the upper side with one height adjusting screw 274 as a fulcrum,
The posture of the upper arm base 180 on the horizontal reference table 190 is not stabilized, and becomes extremely unstable. Note that it is structurally impossible to press the movable end 189a directly above one height adjusting screw 274. When the posture of the upper arm base 180 becomes unstable, the posture of the pair of upper and lower magnetic heads 101 and 102 becomes significantly unstable, as shown in FIG.
The floppy disk 1 is forcibly deformed between the first and second magnetic heads 102, and the output is reduced and the pair of upper and lower magnetic heads 101
The edges and the like of the head bases 184 and 185 of 102 come into contact with the thinned magnetic layers on the upper and lower surfaces of the floppy disk 1, and the magnetic layers may be easily damaged to destroy important data. .

This posture stabilizing mechanism 290 is provided to solve the above-mentioned problem. As shown in FIG. 1 to FIG. 6, this posture stabilizing mechanism 290 has a single height adjusting screw. 274 and two protrusions 292 and 293 distributed to the left and right at three contact points.
80 can be brought into contact with the horizontal reference table 190 of the head carriage 111 to stabilize the horizontal state. At this time, the action point A of the movable end 189a of the torsion coil spring 189
Is a triangular space S connecting three points indicated by dotted lines in FIG.
If it is within 1, the posture (horizontality) of the upper arm base 180 is stable without collapse even if the action point A is slightly shifted. At this time, the height dimensions of the two projections 292 and 293 require some accuracy.

FIG. 9 shows a second embodiment of the attitude stabilizing mechanism 290. In this case, as described above, two height adjusting screws 282 and 283 and two projections are provided. And the posture of the upper arm base 180 on the horizontal reference base 190 is stabilized at three of these four contact points. In this case, if the action point A of the movable end 189a of the torsion coil spring 189 is within the space S2 of a trapezoidal quadrilateral (for example, a trapezoidal quadrangle) indicated by a dotted line connecting the four points, the action point A is set. The posture of the upper arm base 180 can be stabilized even if the position slightly shifts.

Next, FIG. 10 shows the third state of the posture stabilizing mechanism 290.
In this case, in this case, as described above, the upper arm base 180 and the horizontal reference table 190 are connected at three contact points of the two height adjustment screws 282 and 283 and the one protrusion 292. This is to stabilize the posture (horizontality) above. Also in this case, the action point A of the movable end 189a of the torsion coil spring 189 is indicated by a dotted line 3.
If it is within the triangular space S3 connecting the points, the posture of the upper arm base 180 can be stabilized even if the action point A is slightly shifted.

FIG. 11 shows a fourth example of the attitude stabilizing mechanism 290.
In this case, as described above, three height adjusting screws 287, 288, 289
Are also used as the three projections. The three contact points of the three height adjustment screws 287, 288, and 289 change the attitude (horizontality) of the upper arm base 180 on the horizontal reference base 190. It is intended to be stable. Also in this case, if the action point A of the torsion coil spring 189 is within the triangular space S3 connecting the three points indicated by the dotted lines, even if the action point A is slightly shifted,
0 posture can be stabilized.

As described above, the posture stabilizing mechanism 29
According to the first to fourth embodiments, since the upper arm base 180 can be stabilized on the head carriage 111, the inclination of the pair of upper and lower magnetic heads 101 and 102 is corrected, and The horizontality and the like of 101 and 102 can be stably maintained. Accordingly, it is possible to prevent the output from being degraded due to the unstable posture of the pair of upper and lower magnetic heads 101 and 102, and the thinned magnetic layer of the floppy disk 1 from being damaged to destroy data. can do. As shown in FIGS. 9 to 11, two or more height adjustment screws 282 are provided on the projection for stabilizing the posture provided on the lower surface of the upper arm base 180.
If 283, 287, 288, 289 are used (the projections are also used by height adjustment screws), the accuracy of the product dimensions becomes unnecessary.

(3) Description of the Head Assembly Structure Next, the above-described head assembly structure 301 of the pair of upper and lower magnetic heads 101 and 102 is configured to be vertically symmetrical. The assembly structure 301 will be described with reference to FIGS. That is, the head assembly structure 301
Is fixed to the lower surface of the tip 182a of the suspension (upper suspension) 182 horizontally by bonding or the like with a rectangular hollow base made of synthetic resin or the like by bonding or the like. (A surface opposite to the side) is fixed horizontally at the four corners of the outer periphery of the gimbal plate 302 formed of a thin leaf spring by welding or bonding using a welding dowel. The gimbal plate 302 has a plurality of inner and outer U-shaped grooves 303 formed therein. And this gimbal plate 302
The head chip slider 30 is attached to the lower surface of the central portion 302a of the
4 is fixed horizontally by bonding or the like.
Is vertically adhered to a position deviated toward the head gap 304a of the head chip slider 304 on the back surface (upper surface) of the head chip slider 304 through a part of the U-shaped groove 303 on the inner periphery of the head chip slider 304. , This back core 305
A pair of front and rear coils 307 wound around a pair of front and rear coil bobbins 306 are inserted into the outer periphery of both front and rear side portions 305a, and are horizontally arranged. Accordingly, the head chip slider 304 is disposed outside the gimbal plate 302, and the back core 305, the pair of front and rear coil bobbins 30
6 and a coil 307 are arranged inside the gimbal plate 302 and inside the hollow head base 184. A spherical pivot 309 integrally formed on the lower surface of the tip of a pivot arm 308 formed integrally with the central portion inside the head base 184 moves the center position of the back surface of the head chip slider 304 to the gimbal plate 302.
It is configured to be supported from inside.

According to the head assembly structure 301 configured as described above, as shown in FIG. 1, the head chip slider 304, the back core 305, and the head chip slider 304 supported on the upper and lower surfaces of the central portion 302a of the gimbal plate 302.
The entire head movable portion 310 composed of a pair of front and rear coil bobbins 306 and a coil 307 is a pivot 308.
Can be rotatably supported in the directions of arrows C1 and C2 around the X-axis and the Y-axis, which are two axes orthogonal to each other in a horizontal plane with the center as the center. And high output can be obtained. As will be described later, during data recording and / or reproduction, the floppy disk 1 is driven to rotate at a high speed of 3600 rpm or more, so that an air film (air flow) generated on the surface of the floppy disk 1 is generated. As a result, the head chip slider 304 floats on the order of 50 to 100 μm on the micron order against the spring load of the suspension 182.

As shown in FIGS. 19 and 20, in a head carriage assembly structure such as a large-capacity floppy disk drive HFDD developed earlier, a vertical coil is used for a pair of left and right coils 307. The height H11 of the back core 305 is very high.
In addition, the weight of the coil 307 portion was much heavier than the weight of the head chip slider 304. Moreover,
Although the distance L11 of the center of gravity H13 of the head chip slider 304 to the tip position H12 of the pivot 309 is short (close), the tip position H of the pivot 309 is small.
The distance L12 between the center of gravity H14 of the back core 305, the pair of front and rear coil bobbins 306, and the coil 307 with respect to No. 12 is long (far).

For this purpose, the center of gravity G11 of the entire head movable portion 310 supported by the gimbal plate 302
Is set at a position higher by a distance L13 from the tip end position H12 of the pivot 308, and the head movable portion 310 is configured to distribute the weight with a heavy head. For this purpose, as shown in FIG. 20, the head chip slider 304 is moved on the floppy disk 1 by arrows a and b by the suspension 182.
Head moving part 3 with heavy head when seeking in the direction
When acceleration is applied to the center of gravity G1 at a position higher than the tip position H12 of the pivot 309, large rotational moments M1 and M2 around the tip of the pivot 309 are likely to be generated in the head movable portion 310 due to inertial force. Was. Since the rotational moments M1 and M2 become the rotational force of the head chip slider 304 in the roll direction, if the rotational moments M1 and M2 are large, the head chip slider 30 with respect to the floppy disk 1
In this case, the edge 184a of the head base 184 contacts the thinned magnetic layer of the floppy disk 1 and damages the magnetic layer. It was easy for serious accidents to occur that would destroy data. For this reason, at present, the seek speed is suppressed so that rolling does not occur on the head chip slider 304, but there is a problem that the seek time (data access time) does not increase.

Therefore, this large-capacity floppy disk
In the head assembly structure 301 of the drive HFDD, as shown in FIGS. 17 and 18, the height H16 of the back core 305 is significantly reduced by using a low-profile pair of left and right coils 307 and flat coils. The head chip slider 304, the back core 305, and the pair of front and rear coil bobbins 306 are formed by, for example, forming a weight structure 311 below the pair of left and right coil bobbins 306 or increasing the weight of the head chip slider 304. And the distance L11 between the center of gravity H13 of the head chip slider 304 and the tip H12 of the pivot 309.
The back core 305, the pair of front and rear coil bobbins 306 and the coil 3 with respect to the tip end position H12 of the pivot 309.
The head chip slider 30 supported on the upper and lower surfaces of the gimbal plate 302 by, for example, making the distance L12 of the center of gravity H14 of the part 07 substantially equal to the distance L12.
4. Back core 305, a pair of front and rear coil bobbins 306
Moving part 31 composed of a coil and a coil 307
The center-of-gravity position H17, which is the height position of the center-of-gravity point G12 of 0, could be substantially matched with the tip end position H12 of the pivot 309.

Therefore, when the head chip slider 304 seeks on the floppy disk 1 in the directions of arrows a and b by the suspension 182 as shown in FIG. Even if a large acceleration is applied to the center of gravity G12 of the portion 310, the inertia force hardly generates large rotational moments M1 and M2 around the tip of the pivot 309 in the head movable portion 310.

As a result, the head chip slider 304
The seek operation can be performed safely while maintaining the horizontal posture of the head chip slider 304 properly, and good contact characteristics of the head chip slider 304 with the floppy disk 1 can be secured. As a result, it is possible to prevent the thinned magnetic layer of the floppy disk 1 from being damaged by the output drop or the edge 184a of the head base 184 and the like, and to prevent the data from being destroyed. Can be realized. Thus, the seek speed of the head chip slider 304 can be increased, and a high-speed seek operation capable of improving the seek time (data access time) can be performed.

(4) General description of large-capacity floppy disk drive Next, as shown in FIGS. 45 to 51, a large-capacity floppy disk drive HFDD, which is an example of a disk drive, has a plate thickness. Upper and lower covers 42 and 43 pressed by a thin sheet metal are detachably attached to the upper and lower sides of a chassis 41 pressed by a thick sheet metal,
A front panel 44 made of a molded component (plastic molded product) is detachably attached to these front sides to form a flat rectangular parallelepiped drive body 45. A horizontally long cartridge insertion port 46 is formed on the upper end side of the front panel 44, and an inward opening / closing lid 47 is attached inside the cartridge insertion port 46. An eject button 48 and a light emitting display 49 for displaying the operation state of the drive are attached to the left and right sides of the lower portion of the front panel 44.

Then, inside the drive main body 45,
A spindle motor 51 and a disk table 53 mounted on the spindle motor 51 are disposed above the chassis 41 on the front panel 44 side. The disk table 53 is formed on the upper surface of the rotor of the spindle 52. On the upper surface of the disk table 53, a chucking magnet sheet 54 and a rotary drive pin 2 are provided.
5 etc. are attached. And the front panel 4
On the upper side of the chassis 41 on the fourth side, a cartridge holder 56 made of sheet metal or the like, and a sheet metal for driving the cartridge holder 56 to move up and down in the directions of arrows g and h by parallel movement between the unloading position and the loading position. A cartridge loading mechanism 58 having a slide plate 57 constituted by the above is incorporated. A pair of upper and lower magnetic heads 10 configured as a flying head as described later is provided on the upper portion of the chassis 41 on the rear end side opposite to the front panel 44 side.
A linear actuator 103 for transferring the first and the second 102 is incorporated. Incidentally, on the scanning center P ₂ is a scanning position for R / W gap of the spindle motor 51 and the pair of upper and lower magnetic heads 101, 102 for recording and / or reproducing data to the floppy disk 1 (seek and tracking positions) Are located. A motor board 59 is provided below the chassis 41.
A plurality of circuit boards such as a main board 60 and a switch board 61 are screwed horizontally, and an interface board 63 on which an external interface 62 is mounted is screwed horizontally at the rear end of the chassis 41. Then, in the upper part of the chassis 41, the cartridge holder 5
A pair of left and right positioning reference pins 64 and a height reference pin 65 are vertically attached to the lower positions of the four corners of 6, and the reference pin 64 also serves as a height reference pin. Then, a cartridge insertion detection switch 66 including a push switch mounted on the upper part of the switch substrate 61,
Erroneous erase prevention detection switch 67, small capacity detection switch 6
8 and a large-capacity detection switch 69 penetrate the chassis 41 and the slide plate 57 and are exposed at a lower portion of the cartridge holder 56. Note that the eject button 48
The eject switch 70 to be N is mounted on the lower surface of the front end (the end on the front panel 44 side) of the switch board 61.

The chassis 41 has a horizontal bottom plate portion 41a.
And left and right side plate portions 41b vertically raised upward from both left and right sides thereof.
Is the bottom plate portion 41a of the chassis 41 by the motor substrate 59.
Is screwed to the lower portion of the housing through a total of three spacers. The disk table 53 mounted on the upper portion of the spindle motor 51 passes through an opening 72 formed in the bottom plate portion 41a and protrudes above the bottom plate portion 41a. The cartridge holder 56 has a horizontal top plate portion 56a, left and right side plate portions 56b vertically lowered from both left and right sides thereof, and left and right side plate portions 56b.
b, a pair of left and right bottom plate portions 56c that are horizontally turned inward from the lower end of the b. are formed in a generally flat U-shape as a whole, and a large capacity floppy disk cartridge HFDC or a small capacity floppy disk cartridge FDC Arrow a in this cartridge holder 56,
It is configured so that it can be selectively taken in and out horizontally from the direction b. A head insertion opening 73 is cut out at the center of the rear end of the top plate portion 56a of the cartridge holder 56 opposite to the front panel 44 side. The slide plate 57 also has a horizontal bottom plate portion 57a, like the chassis 41, and left and right side plate portions 57b vertically raised from both left and right sides of the bottom plate portion 57a. The slide plate 57 is slidably engaged with a total of four reference pins 64 and a height reference pin 65 by a total of four guide grooves 74 formed in the bottom plate portion 57b. arrow a, and is configured slidably in the direction b between the unloading position P ₁₁ and the loading position P ₁₂ in 41 of the bottom plate portion 41a on.

Then, the cartridge loading mechanism 5
Reference numeral 8 denotes left and right side plate portions 56b of the cartridge holder 56.
A total of four guide pins 75 formed by drawing or the like on the front and rear ends of the
b, and a total of four inclined guide grooves 76 in which a total of four guide pins 75 are slidably engaged with the left and right plates integrally formed at substantially the center of the left and right side plates 56b of the cartridge holder 56 in the front-rear direction. A pair of guide projections 77
Formed on the left and right side plate portions 41b of the chassis 41,
Arrows g and h in which the pair of left and right guide projections 77 are in the vertical direction.
And a pair of left and right vertical guide grooves 78 slidably engaged in the directions. The slide plate 5
Numeral 7 is slid in the forward direction of arrow b by a tension coil spring 79, which is slide urging means attached to the chassis 41, and is located at the rear end side of the chassis 41 (opposite the front panel 44). , Its bottom plate 4
An ejection motor 80 constituted by a geared motor is attached to one side on 1a. An eject cam pin 82 having an eject drive pin 81 formed at an eccentric position is attached to the eject motor 80 and extends rearward from the rear end of one side plate portion 57b of the slide plate 57. The eject arm 81 is driven by an eject drive pin 81. On the bottom plate portion 41a of the chassis 41, a trigger lever 84 also serving as a shutter opening / closing lever is provided by a solid line in FIG. It is rotatably mounted in the directions indicated by arrows i and j between the locked position and the unlocked position indicated by the alternate long and short dash line. ing. And this trigger lever 8
4 is configured to lock and unlock the locked portion 86 formed on the slide plate 57.

[0051] Then, according to the cartridge loading mechanism 58, the unloading state, FIG. 48 and FIG. 50, arrow a against the coil spring 79 pulling the slide plate 57 to the rear of the unloading position P ₁₁ The locked portion 8 is slid in the
6 is locked by the trigger lever 84 engaged with the cartridge 6, and a total of four guide pins 75 of the cartridge holder 56 are pushed up in an arrow h direction upward by a total of four inclined guide grooves 78 of the slide plate 57, while guiding the pair of right and left guide projections 77 in a pair of right and left vertical guide grooves 78, are driven upward by parallel motion of the cartridge holder 56 to the unloading position P ₁₃ is a raised position of the cartridge insertion opening 46 of the same height . When the trigger lever 84 is rotated in the direction of arrow j from the locked position shown by the solid line in FIG. 48 to the unlocked position shown by the one-dot chain line, the lock of the slide plate 57 by the trigger lever 84 is released, and this slide is performed. plate 57 is slid in the arrow b direction by the tension coil springs 79 from the unloading position P ₁₁ shown in FIG. 50 to the front of the loading position P _12, the slide plate 5
7, a total of four inclined guide grooves 78 push down a total of four guide pins 75 of the cartridge holder 56 in the downward direction of the arrow g, and a pair of left and right guide projections 7.
While guiding the 7 in a pair of right and left vertical guide grooves 78, arrow g cartridge holder 56 to the loading position P ₁₄ shown in (A) of FIG. 51 is a set lowered position below the unloading position P ₁₃ by a solid line It is driven downward by parallel movement in the direction. At this time, as shown in FIG. 48, the slide plate 57 is driven at a low speed by a damping action of a damper 88 which is mounted on the bottom plate portion 41a of the chassis 41 and is engaged with a rack 87 formed on the slide plate 57. , The cartridge holder 56 is configured to be gently driven down from the unloading position to the loading position.

At the time of ejection, the ejection drive pin 81 is driven by the ejection cam disc 82 of the ejection motor 80 to rotate one turn in the direction of arrow O at the position shown in FIG. Then, the eject drive pin 81 hooks the eject arm 83 of the slide plate 57 as shown in FIGS. 51B and 51C, and the slide plate 57 is unloaded at the unloading position against the tension coil spring 79. loading from P ₁₂ behind the position P ₁₁
To the loading position P shown in FIG. 51A.
₁₄ is driven upward in the direction of arrow h by parallel movement to the unloading position P ₁₃ shown in FIG. 50, the trigger lever 84 to the locked position 84 shown by the solid line from the unlocked position indicated by the chain line in FIG. 48 in the direction of arrow i and it is configured to slide plate 57 is automatically locked again in its unloading position P ₁₃ by the trigger lever 84 to be automatically restored. As shown in FIG. 47, a cartridge erroneous insertion prevention lever 89 is attached to one side of the rear end side of the top plate portion 56a of the cartridge holder 56 so as to be rotatable around the fulcrum pin 90 in the directions of arrows k and m. The cartridge erroneous insertion prevention lever 89 is rotationally urged in the direction of arrow k by a tension coil spring 91 which is a rotational urging means attached between the lever 89 and the top plate 56a. Further, a pair of left and right cartridge press-fit springs 92 made of a leaf spring or the like is attached to both left and right positions of the top plate portion 56a of the cartridge holder 56. The large-capacity floppy disk drive HFDD configured as described above is configured to be attached to an internal chassis of a computer device or the like by the lower cover 43, and the entire chassis 41 is provided under the four insulators 93 in total. The large-capacity floppy disk drive HFDD is elastically supported on the upper portion of the cover 43 to realize vibration resistance against external vibrations and the like.

The large-capacity floppy disk drive HFDD is configured as described above. The large-capacity floppy disk cartridge HFDC and the small-capacity floppy disk cartridge FDC are selectively inserted from the cartridge insertion port 46 for loading. The data is selectively recorded and / or reproduced on the large-capacity floppy disk HFD and the small-capacity FD. That is, FIG. 47, as shown by the one-dot chain line in FIG. 48 and FIG. 50, the high capacity floppy disk cartridge HFDC or small capacity floppy disk cartridge FDC of the cartridge insertion opening 46 is raised to the unloading position P ₁₃ When the trigger lever 84 is horizontally inserted in the direction of arrow a into the cartridge holder 56, the trigger lever 84 is rotated in the direction of arrow j from the locked position to the unlocked position at the front end face 5a of the cartridge 5, and during this time, the trigger lever 84 Is opened against the shutter spring. Then, the trigger lever 84 is moved to the unlock position by the arrow j.
The moment which is rotated in a direction, downward in the direction of arrow g high capacity floppy disk cartridge HFDC or small capacity floppy disk cartridge FDC of the cartridge holder 56 from the unloading position P ₁₃ to the loading position P ₁₄ shown in FIG. 51 Driven,
These large capacity floppy disk cartridges HF
DC or small capacity floppy disk cartridge FD
C is horizontally loaded to the loading position P _14.

When the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC is correctly inserted from the cartridge insertion slot 46, the cartridge wrong insertion prevention lever 89 is relatively inserted into these wrong insertion prevention grooves 20. Or the large-capacity floppy disk cartridge H
FDC and small capacity floppy disk cartridge FD
C can be inserted. On the other hand, when the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC is erroneously inserted from the cartridge insertion port 46 (that is, inserted in an upside-down or front-to-back reversed direction), the cartridge is erroneously inserted. The insertion preventing lever 89 can inhibit the insertion of the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC.

[0055] Then, the high capacity floppy disk cartridge H loaded on the loading position P ₁₄
FDC or small capacity floppy disk cartridge F
The DC is horizontally pressed and positioned on a total of four reference pins 64 and a height reference pin 65 by a pair of left and right cartridge pressing springs 93. The cartridge insertion detection switch 66 detects the loading completion state, and Whether the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC is protected from erroneous erasure or the recording capacity of the large-capacity floppy disk HFD or the small-capacity floppy disk FD is determined by the erroneous erasure detection switch 67 or the large-capacity detection switch. 69 or the small capacity detection switch 68. Then, when the cartridge insertion detection switch 66 is turned on, the spindle motor 51 is once turned to 3600 rpm.
m or more, and these large-capacity floppy disk HFD or small-capacity floppy disk F
D center core 2 is inserted into the center core hole 6 of the cartridge 5 from below.
4, the center hole 2 a of the center core 2 is fitted to the spindle 52, and the rotation drive pin fitting holes 2 b are fitted to the rotation drive pins 25. When the large-capacity floppy disk cartridge HFDC is loaded, it is detected by the large-capacity detection switch 69 and the spindle motor 51 is detected.
Drives the large-capacity floppy disk HFD at a high speed of 3600 rpm or more, and when the small-capacity floppy disk cartridge FDC is loaded, it is detected by the small-capacity detecting switch 68 and the rotational speed of the spindle motor 51 is 200 to 250 rpm. To drive the small-capacity floppy disk FD. The arrow a along the pair of upper and lower magnetic heads 101, 102 to the scanning center P ₂ by a linear actuator 103, while seeking in the direction b, selective data on these high capacity floppy disk HFD or low capacity floppy disk FD Recorded and / or reproduced.

At this time, the small-capacity floppy disk FD of the small-capacity floppy disk cartridge FDC
The position of the small-capacity floppy disk FD with respect to the pair of upper and lower magnetic heads 101 and 102 is determined by the positioning function based on the engagement relationship between the rotary drive pin 25 and the rotary drive pin fitting hole 2b of the center core 2. (Centering), and the small-capacity floppy disk FD is rotated by the spindle motor 51 at 200 to 250 rpm.
By rotating at a low speed of m, data recording and / or reproduction is performed with the pair of upper and lower magnetic heads 101 and 102 in contact with the upper and lower surfaces of the small-capacity floppy disk FD. On the other hand, the large-capacity floppy disk H of the large-capacity floppy disk cartridge HFDC
Regarding the FD, the rotation driving pin fitting hole 2b of the center core 2 is formed in a large hole, and the rotation driving pin 25
Is loosely fitted in the rotation drive pin fitting hole 2b. Therefore, this large-capacity floppy disk cartridge HF
Regarding the DC large-capacity floppy disk HFD, positioning on the circumference by the tracking servo system (centering) is not performed by the rotation drive pin 25 as in the small-capacity floppy disk cartridge FDC. The large-capacity floppy disk HFD is transferred to the spindle motor 5
By rotating the magnetic heads 101 and 102 at a high speed of 3600 rpm or more, the pair of upper and lower magnetic heads 101 and 102 are floated (flying phenomenon) on the submicron order by air films generated on the upper and lower surfaces of the large-capacity floppy disk HFD. In the contact state, recording and / or reproduction of large-capacity (high-density) data of 100 MB or more is performed.

Then, after recording and / or reproducing data on the large-capacity floppy disk HFD or the small-capacity floppy disk FD, the eject button 4
8, the eject switch 70 is turned on, and the eject drive pin 81 is rotationally driven by the eject cam disc 82 of the eject motor 80 as described above, and the large-capacity floppy disk cartridge HFDC
Or Figure 50 a small capacity floppy disk cartridge FDC from the loading position P ₁₄ shown in (A) of FIG. 51
Together are driven upward in the direction of arrow h by the cartridge holder 56 to the unloading position P ₁₂ shown in,
48, the large-capacity floppy disk cartridge HFDC or the small-capacity floppy disk cartridge FDC is inserted from the cartridge insertion port 46 by the trigger lever 84 which is rotated in the direction of arrow i from the lock release position indicated by the one-dot chain line to the lock position indicated by the solid line. As shown by a dashed line in FIG. 30, the shutter is pushed out in the direction of arrow b, and the shutter is closed by a shutter spring.

(5) Description of Linear Actuator Next, as shown in FIGS. 52 to 55, a pair of upper and lower magnetic heads 101 and 102 configured in a flying head
Linear actuator 103 is a magnetic head transport mechanism for transporting the arrow a along the scanning center P _2, in the b direction, the pair of left and right coils 104, a closed magnetic circuit with a pair of left and right magnet plates 105 and the yoke 107 formed The voice coil motor 109 includes the magnetic circuit 108 described above. At this time, the pair of upper and lower magnetic heads 101 and 102 are supported via a pair of upper and lower head arms 112 and 113 by a head carriage 111 formed of a synthetic resin or the like, as described later. The head carriage 111 is connected to the bottom plate 41 of the chassis 41.
arrow a, have been slidably engaged in the direction b by the respective thrust bearings 172, 173 for scanning center P ₂ guides mounted parallel form the spindle 114 and the guide sub-shaft 115 on a, the head carriage 11
1 is configured to freely these guide main shaft 114 and a guide guided by the auxiliary shaft 115 with arrows along the scanning center P ₂ a, b direction to the slide. And
A pair of left and right coils 104 are horizontally mounted on an upper part of a coil receiving base 116 formed integrally at right and left sides of the head carriage 111 and adhered by an adhesive 117. On the other hand, a pair of left and right magnetic circuits 108 are horizontal, and a pair of upper and lower yokes 106 and 107 arranged horizontally at a distance from each other in the front-rear length direction are abutted from above and below. Are formed, and the magnet plate 105 is closely bonded to the lower surface of the upper yoke 106 (or the upper surface of the lower yoke) by its own magnetic force. The pair of left and right magnetic circuits 108 are mounted on the scanning center P ₂ parallel to the horizontal shape on the bottom plate 41a of the chassis 41, the scanning center pair of coils 104 arranged in right angles with respect to P ₂ Are inserted into the outer periphery of the lower yoke 107 (or the upper yoke 106) of the pair of left and right magnetic circuits 108 in a non-contact state. The pair of left and right coils 104 is connected to the main board 6 via a flexible printed board 118 shown in FIG.
When the control current is applied to the pair of left and right coils 104, the pair of left and right magnetic circuits 108 generate a propulsive force on the pair of left and right coils 104 to guide the head carriage 111. The transfer (seek and tracking) is performed in the directions of arrows a and b along the main shaft 114 and the guide sub shaft 115. In addition, a pair of upper and lower yokes 106 and 107 of a pair of left and right magnetic circuits 108.
Are fixed on a pair of left and right yoke mounts 142 screwed on a bottom plate portion 41a of the chassis 41 with one yoke pressing plate 147 and a total of four screws 154a.

(6) Description of the Apparatus for Attaching the Guide Spindle Next, as shown in FIGS.
The guide spindle mounting device 121 for mounting the guide spindle on the chassis 41 first forms a small-diameter tapered shaft section 122 at the front end 114a, which is one end of the guide spindle 114, in the same axial center state, and the rear end 114b of the other end. A chamfered portion 123 is formed on the outer periphery. Then, the guide spindle 114
At the front end fixed position, the scanning center P ₂ is vertically cut and raised from the bottom plate portion 41a of the chassis 41.
Is formed at a right angle to the guide main shaft receiving hole 12 into which the tapered shaft portion 122 of the guide main shaft 114 is inserted.
5 are formed. In addition, this guide main bearing hole 12
Reference numeral 5 is formed to have a diameter intermediate between the minimum diameter and the maximum diameter of the tapered shaft portion 122. After a sidewall disposed in right angles from the rear end of the bottom plate portion 41a is raised to a vertical shape upwardly relative scanning center f P ₂ of the chassis 41 at the rear end fixed position of the guide main shaft 114 Side plate 4
1c is disposed in the rear side plate portion 41c, and the guide main bearing groove 1 cut vertically downward from the upper end thereof.
26 is formed, and a V-shaped tapered surface 127 is formed at the lower end of the guide main bearing groove 127. Then, the rear surface of the rear side plate portion 41c (the front panel 44)
A leaf spring 128 is detachably attached to the surface opposite to the side by a pair of left and right positioning dowels 130 and one or more screws 131 so as to be detachable from the rear.
28, the center P ₁₁₄ of the guide spindle ₁₁₄
The pressing piece 129 which is inclined at an angle θ ₁ with respect to is formed integrally.

Then, the guide spindle 114 is connected to the chassis 41.
When attached to the parallel horizontal condition and scanning center P ₂ on the top, as shown in FIG. 56, the guide main shaft 114
Of the guide spindle 114 is inserted into the guide spindle receiving hole 125 from the direction of arrow n.
After the 4b is inserted into the guide main bearing groove 126 from the direction of arrow o, the leaf spring 128 is fitted from the back side to the pair of left and right dowels 130 of the rear plate portion 41c of the chassis 41 by the pair of left and right dowel holes 132 for positioning. The pair of left and right screws 131 inserted from the rear into the pair of left and right screw insertion holes 133 of the leaf spring 128 is attached to the pair of left and right screw stopper holes 134 formed in the rear plate portion 41c. The leaf spring 128 is screwed to the rear surface of the rear plate portion 41c from the direction of arrow n. Then, the leaf spring 12
Pressing piece 129 of 8 is pressed against the elasticity of the arrow p direction is tilted direction chamfered portion 123 relative to the axis P ₁₁₄ of the rear end 114a of the guide main shaft 114, the chamfered portion of the guide main shaft 114 Arrow p on 123
Direction pressing force _Fp is applied. And the pressing force F
the guide main shaft 114 by the horizontal component force F _n of _p is pressed in the arrow n direction, which is the axial direction, the guide main shaft 1
14 is pressed into the guide main bearing hole 125 by a wedge action, and the pressing force F _p
The guide main shaft 114 by the vertical component force F _o of being pressed in the arrow o direction is a direction perpendicular to the axial direction,
The rear end 114b of the guide main shaft 114 is pressed into the tapered surface 127 of the guide main bearing groove 126 by a wedge action, and the guide main shaft 114 is fixed on the chassis 41. Then, so that the parallelism of the guide main shaft 114 for scanning center P ₂ by automatic alignment operation by the tapered shaft portion 122 and the tapered surface 127 is set with high accuracy.

According to the guide spindle mounting device 121 configured as described above, one leaf spring 128 which is a single component having the pressing piece 129 is attached to the rear plate portion 41 of the chassis 41.
The guide spindle 114 can be mounted on the chassis 41 with high precision and extremely easily by the small number of parts and the small number of assembling steps that are only required to be screwed with one or a plurality of screws 131 on the back surface of the rear surface c. Cost reduction and productivity can be significantly improved. The guide counter shaft 11
Numeral 5 is installed horizontally between the lower ends of one yoke mount 142.

(7) Description of Rotating Head Elevating Mechanism Next, as shown in FIGS. 21 to 42, the large-capacity floppy disk drive HFDD has a pair of upper and lower suspensions 182 on the head carriage 111. , 183, and a head loading position where a pair of upper and lower magnetic heads 101 and 102, which are configured as flying heads, are brought into contact with the upper and lower surfaces of a floppy disk 1 as a disk-shaped recording medium. A rotary head lifting / lowering mechanism 201 for controlling lifting / lowering between a head unload position separated from both the upper and lower positions is incorporated. Then, this rotary type head lifting / lowering mechanism 201
As shown in FIGS. 44 and 45, a large-capacity floppy disk cartridge HFDC that is selectively and horizontally loaded at the loading position on the chassis 41
The small-capacity floppy disk cartridge FDC is disposed on the bottom plate portion 41a of the chassis 41 at a position (position in the direction of arrow a) behind the front end surface 5a which is the outer periphery of the cartridge 5 of the small capacity floppy disk cartridge FDC.

Then, this rotary head lifting mechanism 2
Reference numeral 01 denotes a pair of upper and lower head arms 11 of the head carriage assembly structure 110 which are mounted on a base plate 202 which is formed of sheet metal parts and is horizontally fixed on a bottom plate portion 41a of the chassis 41.
A pair of upper and lower suspensions 182, 183 of 2, 113
Are provided with a pair of upper and lower suspension lifters 203 and 204 configured by sheet metal parts and the like for opening and closing the upper and lower sides in directions indicated by arrows e and f. Then, the pair of suspensions lifter 203 and 204 in a state perpendicular to the scanning center P ₂ which is the length direction of the pair of upper and lower suspensions 182 and 183, the arrow a is the longitudinal direction, parallel with each other from the b direction The pair of suspension lifters 20
Reference numerals ₃ and 204 denote a horizontal fulcrum pin 205 which is attached to a vertical attachment portion 202a having a substantially middle portion in the longitudinal direction cut and raised on the base plate 202 and configured in parallel with the scanning center P2. Are mounted so as to be rotatable in the directions of arrows A and B which are opposite to each other. The pair of suspension lifters 203 and 204 are crossed substantially in an X-shape with a fulcrum pin 205 as a center. Parts 203a and 204a are formed integrally. The pair of upper and lower suspension arms 18a and 204a of the upper and lower head arms 112 and 113
2, 183 are inserted at right angles from the direction of arrow C to the inside between the upper and lower sides. Accordingly, one of the suspension lifters 203 has its upward suspension support 203
The upper suspension lifter 203 is configured as an upper suspension lifter 203 for driving the upper suspension 182 to open and close by a, and the other suspension lifter 204 is configured to a lower suspension lifter 204 for driving the lower suspension 183 to open and close by a suspension support part 204 a directed downward. The pair of suspension lifters 20
3, 204 are sandwiched from both sides between the mounting portion 202a and the guide portion 202b integrally formed on the opposite side, and are configured to be able to rotate stably in the directions of arrows A and B.

The free ends 203b, 20 which are the other ends of the pair of suspension lifters 203, 204
The side 4b is one side of a pair of upper and lower suspensions 182, 183, and protrudes toward the eject motor 80 shown in FIGS.
4b side, these pair of suspension lifters 203,
A cam mechanism 206 is provided for reversibly driving the shaft 204 in directions indicated by arrows A and B, which are opposite directions up and down, about a fulcrum pin 205. Then, the cam mechanism 206
Are a pair of cam grooves 207 and 208 formed substantially along the center of the free ends 203b and 204b of the pair of suspension lifters 203 and 204;
07, 208, one camshaft 209 commonly inserted
And is constituted by. At this time, the pair of cam grooves 20
7, 208 are a pair of suspension lifters 203, 2
04 have been gently inclined in the vertical directions opposite to each other along the cross direction of the X-type, the cam shaft 209 is arranged for scanning center P ₂ parallel to the horizontal shape. Then, the cam shaft 209 is slid between the open position P ₂₁ shown in FIG. ₂₁ and the closed position P ₂₂ shown in FIG.
8, a pair of suspension lifters 203, 204
Of the suspension lifter 203, 2
04, a pair of upper and lower suspension supports 203a, 203
4a is configured to open and close the pair of suspensions 182 and 183 in the directions of arrows A and B from inside the suspensions 182 and 183 against these spring forces.

Then, on the upper part of the base plate 202,
A first slider 21 made of a sheet metal part or the like is located at a position opposite to the pair of upper and lower suspensions 182 and 183 with the pair of suspension lifters 203 and 204 interposed therebetween.
1 is arranged horizontally, and the first slider 2
11 are formed in the base plate 2
02 on a pair of slide guides 213
Slidably have been engaged, the first slider 211 is configured to freely slide in the arrow G, H direction is a direction parallel to the scanning center P ₂ on. Then, at the upper part of the base plate 202, the free ends 203b, 20 of the pair of suspension lifters 203, 204
A second slider 215 made of a sheet metal part or the like is horizontally disposed at a lower position on the 4b side, and a pair of long holes 216 formed in the second slider 215 are stamped on the base plate 202. Is slidably engaged with the pair of slide guides 217 thus formed.
Is slidable in the directions of arrows C and D. Then, the second slider 215
The cam mechanism 2 is attached to the vertical mounting portion 215a cut and raised.
A cam shaft 209 is mounted horizontally with cantilever support. Then, at the top of the base plate 202,
The upper and lower two-stage gears 220 and 221 made of a molded part or the like constituting the direction changing means 219 are provided on one support shaft 2 at positions inside the orthogonal portions of the first and second sliders 211 and 215.
22 are rotatably mounted via a first and second sliders 211 and 215.
Two racks 223 and 224 have upper and lower two-stage gears 220,
221. And this direction changing means 2
Reference numeral 19 denotes the second slider 215 that is slid in the direction of arrow C via the rack 223, the second-stage gears 220 and 221 and the rack 224 when the first slider 211 is slid in the direction of arrow G. Also, the first slider 2
When 11 is slid in the direction of arrow H, the rack 22
The first and second sliders 211 and 21 are configured to slide and drive the second slider 215 in the direction of arrow D via the third and second gears 220 and 221 and the rack 224.
5 is configured to convert the sliding direction to a right angle.

Then, the slide plate 57 of the cartridge loading mechanism 58 described above is moved by the ejection drive pin 81 of the ejection cam disc 82 of the ejection motor 80 composed of a geared motor, and A selective drive mechanism 225 for selectively driving the one slider 211 is arranged. The drive system of the slide plate 57 in the selective drive mechanism 225 is shown in FIGS.
Is constituted by the eject drive pin 81 and the eject arm 83 of the slide plate 57 described in
The drive system of the first slider 211 includes an eject drive pin 81 and a transmission arm 226 rotatably attached to the end of the first slider 211 on the arrow H direction side.

The transmission arm 226 is formed of a molded part or the like. The transmission arm 226 is disposed in the directions of arrows G and H. The transmission arm 226 is located inside the end of the transmission arm 226 on the side of the arrow H. A fulcrum pin 227 integrally formed in a right angle is parallel to the directions of arrows A and B between a pair of left and right transmission arm support portions 228 bent on both sides of the end of the first slider 211 on the side of arrow G. The transmission arm 226 is rotatably mounted on the fulcrum pin 227 in the directions of arrows I and J, which are vertical directions. The distal end 226a of the transmission arm 226 on the arrow H direction side is configured to be freely movable in and out of the rotation locus of the eject drive pin 81 in the arrow G and H directions. The upper surface 226b of the transmission arm 226 is formed in an arc shape substantially along the rotation locus of the ejection drive pin 81.

The eject motor 80 is configured to open and drive the pair of suspension lifters 203 and 204 of the rotary head elevating mechanism 201 in the direction of arrow A via the selective driving mechanism 225 as described later. And the pair of suspension lifters 20
A tension spring 229, which is a rotation urging means for rotating and driving the third and fourth cylinders 204 so as to close in the direction of arrow B, has both ends of a tension coil spring 229 integrally formed inside a tip 226a of a transmission arm 226, and On the arrow G direction side, it is locked along with a spring locking portion 231 mounted on the bottom plate portion 41a of the chassis 41, and is arranged along the arrow G, H directions. Then, as shown in FIG. 35, the transmission arm 226 is urged to rotate in the direction of arrow I about the fulcrum pin 227 by the tensile force of the tension coil spring 224, and the end of the transmission arm 226 on the fulcrum pin 227 side. The small projection 232 integrally formed with the first slider 211
Is stopped by being brought into contact with the stopper portion 233 formed in the direction indicated by the arrow I, and at this time, the position of the distal end surface 226a of the transmission arm 226 is substantially vertically regulated.

(8)... Description of Latch Mechanism Next, as shown in FIGS. 29 to 33, this rotary head lifting mechanism 201 has a pair of upper and lower suspension supports of a pair of suspension lifters 203 and 204. Part 2
A latch mechanism 235 is provided for latching 03a and 204a in the closed state shown in FIG. The latch mechanism 235 is positioned above the end of the base plate 202 on the arrow G side, and
1 and a rotating arm 236 made of a sheet metal part or the like rotatably attached to the inner position of
A plunger 237, which is an upwardly facing plunger solenoid constituting electromagnetic means fixed to the top,
And a rotary arm control unit 238 protruding substantially perpendicularly in the directions of arrows C and D inside the end of the slider 211 on the arrow G direction side. The rotation arm 236 is attached to the vertical mounting portion 202c cut and raised on the base plate 202 by fulcrum pins 239 parallel to the directions of arrows C and D on the base plate 202 by arrows H and G.
The rotary arm 236 is rotatably mounted in the directions of arrows K and L, which are vertical directions along the direction, and the rotary arm 236 is moved in the direction of arrow L, which is the direction of attraction to the plunger 237, by the torsion coil spring 240 as a rotation urging means. Rotationally biased. A movable iron piece 241 for magnetically attracting the plunger 237 is attached to the tip of the rotary arm 36 via a fulcrum pin 242 so as to be rotatable within a certain angle range. Further, when the first slider 211 is slid in the direction of arrow G, the rotating arm controller 238 of the first slider 211
6 is configured to be controlled to rotate in the direction of arrow K, which is the direction in which suction from the plunger 237 is released.

(9) Description of the Head Carriage Lock Mechanism Next, as shown in FIGS. 29 and 30 to 34, the rotating head lifting mechanism 201 has a pair of upper and lower magnetic heads 101 and 102. When the head is unloaded, the head carriage 111 is locked with the pair of upper and lower magnetic heads 101 and 102 retracted in the direction of the arrow a to the outermost peripheral position of the floppy disk 1, and the heads of the pair of upper and lower magnetic heads 101 and 102 are locked. A head carriage lock mechanism 245 for unlocking the head carriage 111 at the same time as the completion of the loading and enabling the pair of upper and lower magnetic heads 101 and 102 to seek the floppy disk 1 in the directions of arrows a and b is attached. . The head carriage lock mechanism 245 uses a horizontal lock arm 252 made of a molded component or the like, and one end 252a of the lock arm 252 is formed in a head carriage control unit, and is provided on the lower surface of the other end 252b. The fulcrum pin 253 is integrally formed vertically and further,
An interlocking pin 254 is integrally formed vertically on the upper surface of the intermediate portion. Then, the lock arm 252 is horizontally disposed below the eject motor 80 at a position deviated in the direction of the arrow H which is the first slider 211 side,
It is mounted on the bottom plate 41 a of the chassis 41 via a fulcrum pin 253 so as to be rotatable in a horizontal plane in the directions of arrows M and N. Then, the interlocking pin 254 on the upper surface of the intermediate portion of the lock arm 252 is moved by the arrow G of the first slider 211.
It is rotatably and slidably engaged in a cam groove 255 formed at the end on the direction side. One end 252a of the lock arm 252 is perpendicular to one side of the head carriage 111, and a lock arm contact portion protruded laterally outward from the lower surface of one of the coil receiving bases 116 protruding horizontally. It is configured to be able to contact 256 from the direction of arrow M.

(10) Description of the Operation of the Rotating Head Elevating Mechanism Next, the selective driving mechanism 225 configured as
Latch mechanism 235 and head carriage lock mechanism 25
The operation of the rotary head lifting / lowering mechanism 201 provided with a large-capacity floppy disk / cartridge HFDC will be described. Cartridge holder 56
The upper head arm 1 of the head carriage 111
12, the upper magnetic head 101 and the suspension 182 are pushed up in the direction of arrow A to the ascending / retreating position shown in FIG. 26 against the elastic return force of the upper magnetic head 101 and the suspension 182. I have. Then, the cartridge is unloaded state, as shown in FIG. 30, the first slider 211 on the base plate 202 is slidably driven in the arrow G direction by a tension coil spring 229 to the initial position P _23.

[0072] At this time, as shown in FIG. 30, the interlocking pin of the first when it is slidably driven in the arrow G direction by the slider 211 is the tension coil spring 229 to the initial position P _23, the lock arm 252 of the head carriage lock mechanism 251 254 is the cam groove 2 of the first slider 211
The lock arm 252 is driven to rotate in the direction of arrow M around the fulcrum pin 253 on the chassis 41 to the head carriage lock position by the drive arm 55 in the direction of arrow G. Then, one end (tip) 2 of the lock arm 252
52a is in contact with the lock arm contact portion 256 of the head carriage 111 of the head carriage assembly structure 110 from the direction of the arrow M, and the lock arm 252 of the head carriage 111 corresponds to the outermost periphery of the large-capacity floppy disk HFD shown in FIG. to a position P ₂₇ slides driven in the direction of arrow a, the pair of upper and lower magnetic heads 101, 102
Is the large-capacity floppy disk HF shown in FIGS. 27 and 2.
It is slid in the direction of arrow a to the outermost position P ₂₈ and D,
Head carriage 111 is directly locked to the outermost position corresponding P _27.

Next, as shown in FIG. 30, when the first slider 211 is slid in the direction of arrow G to the initial position P ₂₃ by the extension coil spring 229 on the base plate 202, the direction is changed via the direction changing means 219. The second slider 215 is moved to the open position P ₂₅ shown in FIGS. 30 and 21.
Is slid in the direction of arrow C. Then, FIG.
As shown in, is slidably driven in the arrow C direction to the open position P ₂₁ by the cam shaft 209 is a second slider 215 that the cam mechanism 206, the free end portions 20 of the pair of suspensions lifter 203 and 204 by the cam shaft 209
Since the cam grooves 207 and 208 of the pair 3b and 204b are driven to open in the direction of arrow A, which is the opening direction upside down, the pair of upper and lower suspension supports 203a and 204a of the pair of suspension lifters 203 and 204 are located on the base plate 202. around a fulcrum pin 205 to the open position P ₂₉ is open drive in the direction of arrow a.

Therefore, as shown in FIG. 26, a pair of upper and lower head arms 112,
113 is a pair of suspension lifters 203 and 204
Arrow direction a side slide deflection state, it is open in the direction of arrow A pair of upper and lower suspension supporting portion 203a of the pair of suspensions lifter 203 and 204, 204a up to an open position P ₂₉ against. However, at this time, as shown in FIG. 58, since the upper suspension 182 of the upper head arm 112 has been raised in the direction of arrow e to the upper retreat position, the upper suspension 182 is driven to open and close as shown in FIG. Upper suspension support 203 of upper suspension lifter 203
a is be raised in the direction of arrow A to an open position P _29, no that the upper suspension supporting portion 203a is contacted to the upper suspension 182. However, when the lower suspension supporting portion 204a of the lower suspension lifter 204 for opening and closing the lower suspension 183 is lowered in the direction of arrow A to an open position P _29, against the lower suspension 183 that its spring force When the lower magnetic head 102 is slightly pushed down in the direction of arrow e,
Is pushed down in the direction of arrow e, which is slightly lower than the head load position contacting the lower surface of the large capacity floppy disk HFD.

In this cartridge unloading state, as described above, the large-capacity floppy disk cartridge HFDC is inserted into the cartridge holder 56 shown in FIG. There is slid in the direction of the arrow b from the unloading position P ₁₁ to the loading position P _12, the cartridge holder 56
High capacity floppy disk cartridge HF
When DC is completed loaded in the direction of arrow g from the unloading position P ₁₃ to the loading position P ₁₄ shown in FIG. 51, next to the spindle motor 51 is ON, with the high capacity floppy disk HFD is driven to rotate at a high speed 3600rpm The upper suspension 182 of the upper head arm 112 and the upper magnetic head 101 are shown in FIG.
Is lowered in the direction of arrow f from the upper retreat position shown in FIG. Then, as shown in FIG. 27, the upper suspension 182 is lowered in the direction of arrow f by its spring force, and
Abut on the upper suspension support 203a.
Therefore, in this state, a pair of upper and lower magnetic heads 101, 10
2 is held at the head unloading position vertically separated from the upper and lower surfaces of the floppy disk 1, and the upper and lower magnetic heads 101 and 102 are impacted on the upper and lower surfaces of the floppy disk 1 by the cartridge loading operation. There is no danger of contact.

Thereafter, as described later, when a data recording / reproducing command signal is input from the host computer, the ejection drive pin 81 of the ejection motor 80 is rotated by the rotation center shaft 82a as shown in FIG. is rotated approximately 120 ° such as an arrow O direction from the initial position P ₃₁ shown by the solid line to the head loading position P ₃₂ shown by the dotted line by the ejecting cam disk 82 which is. Incidentally, the eject motor 80 when the eject drive pin 81 reaches the head loading position P ₃₂ is automatically stopped. Then
As shown in FIGS. 35 and 36, the ejection drive pin 81 abuts on the tip 226a of the transmission arm 226 of the selective drive mechanism 225 from the direction of arrow O, and pushes the transmission arm 226 against the tension coil spring 229 by the arrow. Press in the H direction. At this time, a rotational component in the direction of arrow I is generated in the transmission arm 226.
2 abuts against the stopper portion 233 of the first slider 211 from the direction of the arrow I, and the rotation of the transmission arm 226 in the direction of the arrow I with respect to the first slider 211 is prevented. The driving force of the eject driving pin 81 rotated in the direction of arrow can be stably received, and the driving force of the eject driving pin 81 in the direction of the arrow O is accurately transferred to the first slider 211 via the fulcrum pin 227 of the transmission arm 226. Is transmitted to Thus, it is driven the first slide in the direction of arrow H slider 211 against the tension coil spring 229 from the initial position P ₂₃ shown in FIG. 30 until the slide position P ₂₄ shown in FIG. 29. When the first slider 211 that is slidably driven in the arrow H direction to the slide position P _24, the second slider 215 via the direction changing means 219 in FIG. 3
From 0 and an open position P ₂₅ shown in FIG. 21 to the closed position P ₂₆ shown in FIG. 29 is slidably driven in the arrow D direction.

Then, a pair of suspension lifters 2
The cam shaft 209 of the cam mechanism 206 of FIG.
From ₂₁ to the closed position P ₂₂ shown in FIG. 22 is slidably driven in the arrow D direction, a pair of suspensions lifter 203,
204, the free ends 203b, the cam grooves 207 of the 204b,
08 is rotationally driven in the up-down direction in the direction of arrow B, which is the upside-down closing direction, and the pair of upper and lower suspension supports 20 of the pair of suspension lifters 203 and 204 is rotated.
3a and 204a are fulcrum pins 2 on the base plate 202.
05 is closed driven from the open position P ₂₉ shown in FIGS. 21 and 27 in the arrow B direction, which is upside down to the closed position P ₃₀ shown in FIGS. 22 and 28 around the.

Then, as shown in FIG. 28, the closed position P _{30 of the} pair of upper and lower suspension supports 203a, 204a is set.
The pair of upper and lower suspension arms 18 of the pair of upper and lower head arms 112 and 113 are adapted to follow the closing operation of
2 and 183 are naturally closed in the direction of arrow f, which is the opposite direction by the spring force, so that the pair of upper and lower magnetic heads 10
1 and 102 are soft-landed (soft landing) from the head unloading position shown in FIG. 27 to the head loading position shown in FIG. That is, this time, when the cam shaft 209 of the cam mechanism 206 is slidably driven in the arrow D direction from the open position P ₂₁ shown in FIG. 21 to the closed position P ₂₂ shown in FIG. 22, by a pair of cam grooves 207, 208 A pair of suspension lifters 203 and 204 are used as fulcrum pins 20.
5, the pair of suspension lifters 203, 20
4 upper and lower suspension support portions 203a, 204
closed position P where a is shown in FIG. 28 from the open position P ₂₄ shown in FIG. 27
The magnetic heads 101 and 102 are closed and driven in the direction of arrow B at a safe speed up to ₃₀ , and the pair of upper and lower magnetic heads 101 and 102 are softly landed on the upper and lower surfaces of the floppy disk 1 at a safe speed in a non-impact manner.

[0079] At this time, as shown in FIG. 28, upper and lower pair of suspension support portions 203a, 204a are closed position P ₃₀
In the course of closing the direction of arrow B to a pair of upper and lower magnetic heads 101, 102 are head loaded on the head loading position, after the head loading, and a pair of upper and lower suspension supporting portion 203a, 204a has reached the closed position P ₃₀ .
Therefore, in the head loading completed state, the pair of upper and lower suspension supports 203a and 204a is completely separated in the direction of arrow B inside the pair of upper and lower suspensions 182 and 183, and the recording and / or recording of the floppy disk 1 described later is performed. At the time of reproduction, a pair of upper and lower magnetic heads 10
There is no danger that the pair of upper and lower suspensions 182 and 183 will interfere with the pair of upper and lower suspension supports 203a and 204a when the units 1 and 102 are sought in the directions of the arrows a and b.

Then, the first slider 211 is moved to the position shown in FIG.
Slide position P ₂₄ shown in FIG. 29 from the initial position P ₂₃ shown in
When the slider is driven in the direction of arrow H, the interlocking pin 244 of the lock arm 242 of the head carriage lock mechanism 241 is driven in the direction of arrow H by the cam groove 245 of the first slider 211. Then, the lock arm 242 is driven to rotate around the fulcrum pin 243 from the head carriage lock position shown in FIG. 30 to the head carriage lock release position shown in FIG. Lock arm contact portion 2 provided on one side of carriage 111
Escape to the outside of the movement trajectory in the directions of arrows a and b of 46. Then, by releasing the head carriage lock, the head carriage 111 can be sought in the directions of arrows a and b by the linear actuator 103.

On the other hand, the O
Almost simultaneously with N, the plunger 23 of the latch mechanism 235
7 are energized. When the first slider 211 is slidably driven in the arrow H direction from the initial position P ₂₃ shown in FIG. 30 until the slide position P ₂₄ shown in FIG. 29, the rotation arm control unit 2 of the first slider 211
38 is also slid in the direction of arrow H. Then, the rotary arm 236 of the latch mechanism 235 is rotated by the torsion coil spring 240 about the fulcrum pin 239 from the latch release position shown in FIG. 31 to the latch position shown in FIG. Movable iron piece 241
Is automatically attracted to the upper surface of the plunger 237 by magnetic attraction. As a result, the rotating arm 236 is latched at the latch position as it is, and the rotating arm 236 is moved to the first slider 21 via the rotating arm control unit 238.
It will be directly latched to 1 slide position P ₂₄ shown in FIG. 29.

That is, as described above, the first slider 211 that has been slid in the direction indicated by the arrow H via the transmission arm 226 by the eject drive pin 81 still has a sliding return force in the direction indicated by the arrow G by the tension coil spring 229. Is energized, but the plunger 23
When the rotary arm 236 of the first slider 211 is pressed in the direction of the arrow H by the rotary arm 236 automatically attracted to the slider 7, the first slider 211 is slid in the direction of the arrow G by the tension coil spring 229. The first slider 211
And it is configured as to be able to latch the slide position P ₂₄ shown in FIG. 29.

Then, the first slider 211 is moved to the position shown in FIG.
If it is latched in the slide position P ₂₄ shown in, redirecting means 2 of non-slip structure which is constituted by the upper and lower gears 220, 221 and a pair of racks 223 and 224
29 and FIG.
Will directly be latched in the direction of arrow D in the closed position P ₂₆ shown in 2, the cam shaft 209 of the cam mechanism 206 in the head lifting mechanism 201 is directly latched in the closed position P ₂₂ shown in FIG. 22, a pair of suspension Lifter 20
A pair of upper and lower suspension supports 203
a, 204a are a pair of upper and lower suspensions 182, 18
It is contacted with 3 to become a directly safely be latched in the closed position P ₃₀ no.

As described above, a large capacity floppy disk
With the loading operation of the cartridge HFDC to the loading position, a pair of upper and lower magnetic heads 101, 102
Are brought into contact with the upper and lower surfaces of the large-capacity floppy disk HFD. After the soft landing operation is completed, a current is applied to the voice coil motor 109 of the linear actuator 103 by a command signal from the host computer, and the head carriage 111
Are driven in the directions of arrows a and b in FIGS. 29 and 28. At this time, the large-capacity floppy disk HFD in the large-capacity floppy disk cartridge HFDC
Is driven by the spindle motor 51 at a high speed of 3600 rpm or more, and a pair of upper and lower magnetic heads 101 and 102 are formed by a pair of upper and lower head arms 112 by air films generated on both upper and lower surfaces of the large capacity floppy disk HFD. The large-capacity floppy disk HFD is floated (flying phenomenon) on both the upper and lower surfaces of the large-capacity floppy disk HFD on the submicron order against the spring force of the pair of upper and lower suspensions 113, 183. Then, in a non-contact state by the floating, a pair of upper and lower magnetic heads 101, 1
02 seeks the large-capacity floppy disk HFD in the directions of arrows a and b, and the large-capacity floppy disk HFD
A large capacity (high density) data of 100 MB or more is recorded and / or reproduced.

At this time, as shown in FIG. 28, a pair of suspension lifters 203, 2
04, a pair of upper and lower suspension supports 203a, 203
Because 4a is securely latched in the closed position P _30, the arrow a, the pair of upper and lower suspensions pair of upper and lower head arms 112, 113 are seeking driven in the direction b of the pair suspension supporting portion 203a, interference 204a And the seek drive can be performed safely.

Next, after recording and / or reproducing of data to high capacity floppy disk HFD, eject the high capacity floppy disk cartridge HFDC from the loading position P ₁₄ shown in FIG. 51 to the unloading position P ₁₃ shown in FIG. 50 48, as described above, FIG.
When the eject switch 70 is turned on by pressing the eject button 48 shown in FIG. 49, first, a current is applied to the voice coil motor 109 of the linear actuator 103, and the head carriage 111 of the head carriage assembly structure 110 is moved to FIG. to the outermost position corresponding P ₂₇ shown in 28 is moved back to the direction of arrow a, the pair of upper and lower magnetic heads 101, 102 are moved in the direction of arrow a to the outermost position of the high capacity floppy disk HFD.
Then, after this, the plunger 2 of the latch mechanism 235
The energization of the coil 237a of the 37 is cut off, and the magnetic attraction of the movable iron piece 241 at the tip of the rotating arm 236 by the plunger 237 in the head elevating mechanism 211 is released. Then, the latch of the first slider 211 by the rotating arm 236 is released, and the first slider 211 is moved from the slide position P ₂₄ shown in FIG.
To the initial position P ₂₃ shown in 0 is slid back to the arrow G direction. At this time, the rotating arm 236 is moved from the latch position shown in FIG.
1, the rotation is returned in the direction of arrow K against the torsion coil spring 240 to the latch release position. Then, the first slider 2 in the head carriage lock mechanism 24
11 cam groove 245 is the interlocking pin 2 of the lock arm 242
44, the lock arm 242 is driven to rotate in the direction of arrow M from the head carriage lock release position shown in FIG. 29 to the head carriage lock position shown in FIG. one end 242a of the lock arm 242 is in contact with the lock arm abutment 246 of the head carriage 111 of the linear actuator 103 from the direction of the arrow M, the outermost position corresponding P ₂₇ indicating the head carriage 111 in FIGS. 30 and 28 Lock.

[0087] On the other hand, when the first slider 211 is slid back to the direction of the arrow G from the slide position P ₂₄ shown in FIG. 29 to the initial position P ₂₃ shown in FIG. 30, the direction changing means 2
19 through the second slider 215 shown in FIGS.
From the closed position P ₂₆ shown in 2 to an open position P ₂₅ shown in FIGS. 30 and 21 is slid back to the arrow C direction. Then, the cam shaft 209 of the cam mechanism 206 is slid back to the direction of arrow C to the suspension an open position P ₂₃ shown in FIG. 21 from the suspension closing position P ₂₄ shown in FIG. 22, through a pair of cam grooves 207, 208 pair The free ends 203b and 204b of the suspension lifters 203 and 204 are driven to open about the fulcrum pin 205 in the direction of arrow A, which is an opening direction that is upside down, and the pair of suspension lifters 20
A pair of upper and lower suspension supports 203
a and 204a are shown around the fulcrum pin 205 in FIGS.
Open driven in an arrow A direction, which is the opening direction of the upside-down from the closed position P ₃₀ to the open position P ₂₉ shown in FIGS. 21 and 27 shown in 8. Then, as shown in FIG. 27, a pair of upper and lower head arms 112, 1 of the head carriage assembly structure 110 is formed by the suspension support portions 203a, 204a of the pair of suspension lifters 203, 204.
The pair of upper and lower suspensions 182 and 183 are pushed out in the direction of arrow e, which is the direction opposite to the upper and lower directions, against these spring forces, and the pair of upper and lower magnetic heads 101 and 102 have a large capacity as shown in FIG. FIG. 27 shows the head loading position in contact with the upper and lower surfaces of the floppy disk HFD.
As shown in (1), the head is unloaded so as to be pushed and spread from both the upper and lower surfaces of the large-capacity floppy disk to the head loading positions separated in both directions.

Then, as shown in FIG.
1 ejecting the eject drive pin 81 of the cam disc 82 of the geared motor 80 from the initial position P ₃₁ in the direction of the arrow O
It is driven to rotate. Then, as described with reference to FIGS. 51 and 50, by the eject drive pin 81 slide plate 57 of the cartridge loading mechanism 58 is driven slide from the loading position P ₁₂ to the unloading position P _11, the cartridge holder 57 loading position by being raised back to the direction of arrow h to the unloading position P ₁₃ from the P _14, after the high capacity floppy disk cartridge HFDC is raised in the arrow h direction from its loading position P ₁₄ to the unloading position P _13, the cartridge The ink is discharged from the inside of the holder 57 to the outside of the cartridge insertion opening 46 in the direction of arrow b.

Here, according to FIG. 35 to FIG. 40, the eject motor 80 is selectively driven through the selective drive mechanism 225.
The operation of selectively driving the slide plate 57 and the first slider 211 will be described. First, as shown in FIG.
The second output pin and is the eject drive pin 81 is initialized to the initial position P _31, as described above, when the disk cartridge eject, 360 ° rotation in the arrow O direction is clockwise from the initial position P ₃₁ It is again stopped at the initial position P ₃₁ is. At the time of head loading mentioned above, this eject drive pin 81 from the initial position P ₃₁ to a head loading position P ₃₂ is rotated approximately 120 ° such as an arrow O direction, and is stopped at that position. And, in the sleep mode described later, after once returned to the direction of arrow P from the head loading position P ₃₂ to the initial position P _31, performs the forward and reverse rotation operations as rotated in the direction of the arrow O to the head loading position P ₃₂ again It is configured as follows.

Next, as shown in FIG. 35, as described above, the large-capacity floppy disk cartridge HFDC
Is loaded to the loading position, and a cartridge insertion detection switch (disc-in switch) 66 shown in FIG.
2 by rotating the, when the head loading, when the eject drive pin 81 is rotated in the direction of the arrow O from the initial position P ₃₁ shown in FIG. 35 to the head loading position P ₃₂ shown in FIG. 36, the eject drive pin 81 Pushes the tip 226a of the transmission arm 226 in the direction of arrow O. Then, the first slider 211 is slid in the direction of the arrow H through the transmission arm 226 as shown in FIG. 29, and the above-described head loading is performed. At this time, as shown in FIG. 36, since the small protrusion 226c of the transmission arm 226 is in contact with the stopper portion 232 of the first slider 211 from the direction of arrow I, the transmission arm 226 is moved in the direction of arrow J. To the first position by the ejection drive pin 81.
Can be reliably slid in the direction of arrow H.

Next, in a sleep mode to be described later, FIG.
In the head loading completion state shown in FIG.
11 is slid in the direction of arrow G to perform the above-described unloading, and the tip 226a of the transmission arm 226 is moved to the position shown in FIG.
As shown by an alternate long and short dash line in FIG. Therefore, when to return from the sleep mode (head unloading state) to the head loading state, as shown in FIG. 37, the reverse rotation once the direction of arrow P the eject drive pin 81 from the head loading position P ₃₂ to the initial position P ₃₁ At this time, the ejection drive pin 81 moves the upper surface 226b of the transmission arm 226 by the arrow J.
The transmission arm 226 is rotated in the direction of arrow J against the rotational urging force of the tension coil spring 229 to release the initial position P while rotating in the direction of arrow P while pushing in the direction of arrow P.
Returning to ₃₁ , as shown in FIG.
Just before 1 Return to the initial position P ₃₁ through the direction of the arrow P,
The transmission arm 226 is rotated and returned in the direction of arrow J by the rotational urging force of the extension coil spring 229. Therefore, after this, it is rotated again in the arrow O direction the eject drive pin 81 from the initial position P ₃₁ to a head loading position P _32, FIG. 3
As shown in FIG. 6, the tip 226a of the transmission arm 226 is pushed in the direction of arrow H by the ejection drive pin 81,
The first slider 211 is slid in the direction of arrow H,
Head loading will be performed.

(11) Description of head attitude control mechanism at the time of head loading Next, the head attitude control mechanism 261 as head attitude control means at the time of head loading will be described with reference to FIGS. As described above, the control mechanism 261 moves the pair of upper and lower suspension supports 203a and 204a of the pair of suspension lifters 203 and 204 in the head lifting mechanism 201 to the positions shown in FIGS.
Closed position P from the open position P ₂₉ shown in FIG. 22 and FIG. 28
_{30 is} driven in the direction of arrow B to move the pair of upper and lower magnetic heads 101 and 102 to the pair of upper and lower suspensions 182, 1
Using the spring force of 83, the head is closed from the head load position shown in FIG. 27 to the head load position shown in FIG. 28 in the direction of arrow f, and as shown in FIG. Upper and lower surfaces 1a and 1b of a floppy disk 1 such as a large-capacity floppy disk HFD which is rotationally driven at a high speed of 3600 rpm or more in the direction.
When making contact with the magnetic disk 101 in the direction of arrow f, the downstream side of the pair of upper and lower magnetic heads 101 and 102 in the direction of arrow E which is the rotation direction of the floppy disk 1 (arrow E).
Direction), the downstream ends 101a, 102b of the upstream ends 101b, 102b are always the upstream ends 101b, 102b. Floppy disk 1 first
The head upper and lower surfaces 1a and 1b are provided with a head attitude control means for contacting from the direction of arrow f, that is, a stable landing attitude for soft landing.

As shown in FIG. 25, at the time of head loading, a pair of upper and lower magnetic heads 1
If it is possible to take a stable landing posture such that the downstream ends 101a and 102a of the 01 and 102 are soft-landed from the direction of the arrow f before the upstream ends 101b and 102b, at the moment of the landing, Since a pair of upper and lower gaps 266 having an opening angle with respect to the upper and lower surfaces 1a and 1b of the floppy disk 1 are formed on the upstream end portions 101b and 102b of the upper and lower magnetic heads 101 and 102, the speed is high. The airflow flowing at high speed in the direction of arrow E along the upper and lower surfaces 1a and 1b of the rotating floppy disk 1 can smoothly flow into the pair of upper and lower gaps 2266. This air flow is generated by a pair of upper and lower magnetic heads 10.
The pair of upper and lower magnetic heads 101 and 102 are pushed up smoothly in the direction of arrow e against the spring force of the pair of upper and lower suspensions 182 and 183 so that the pair of upper and lower magnetic heads 101 and 102 The upper and lower surfaces 1a, 1b can be floated in a substantially parallel shape on the order of submicron and stabilized.

As a result, as shown in FIG. 60, the landing posture at the moment when the pair of upper and lower magnetic heads 101 and 102 is soft-landed on the upper and lower surfaces 1a and 1b of the floppy disk 1 from the direction of arrow f is disturbed. Upstream end portions 101b, 1 of the magnetic heads 101, 102
02b comes into contact with the upper and lower surfaces 1a and 1b of the floppy disk 1 prior to the downstream end portions 101a and 102a, and induces rolling vibration in the direction of arrow F due to the action of air entrainment on the pair of upper and lower suspensions 182 and 183. As a result, stick-slip occurs in the pair of upper and lower magnetic heads 101 and 102, and as a result, both the upper and lower magnetic layers 1 a and 1 b of the floppy disk 1 are thin and the pair of upper and lower magnetic heads 101 and 102 are damaged. It is possible to prevent such a risk from occurring.

FIGS. 2 and 2 show a first embodiment of the head attitude control mechanism 261. In this case, a pair of suspension lifters 20 are used.
A pair of upper and lower suspension supports 203
a, a pair of upper and lower suspension offset support portions 262 and 263, which are small projections, are integrally formed on the upper and lower surfaces of the upper and lower surfaces 204a and 204a. The pair of upper and lower suspension offset support portions 262 and 263 is, for example, a vertically symmetrical substantially hemispherical convex portion formed integrally with the upper and lower surfaces of the pair of upper and lower suspension support portions 203a and 204a by stamping or the like. It is configured.

According to the first embodiment of the head attitude control mechanism 261, as shown in FIGS. 21 and 27, when the head is unloaded, a pair of upper and lower suspension supports of the pair of suspension lifters 203 and 204 are provided. 203a, 204a is rotated in the direction of arrow a to an open position P _29, the pair of upper and lower suspensions 182, 183
The when opened driven in the arrow e direction to the open position P ₂₉ against its spring force, as shown in FIG. 21, a pair of upper and lower suspensions offset support portions 262, 263 in the width direction of the pair of upper and lower suspensions 182, 183 (This width direction refers to the arrow D direction in FIG. 22 corresponding to the downstream direction of the arrow E direction which is the rotation direction of the floppy disk 1 shown in FIG. 25, and the arrow C direction in FIG. 21 corresponding to the upstream direction. )
Of the center P ₁₁ of arrow E direction (hereinafter, simply referred to as a rotational direction E) which is a rotation direction of the floppy disk 1 with respect to the offset which is offset to the offset amount OS of predetermined dimensions in the direction of arrow C on the upstream side of the the position P ₄₂ arrow a
Open drive in the direction.

As a result, as shown in FIG. 21 and as shown by the dashed line in FIG.
Arrows A in the width direction against the spring force at 2, 183
In the width direction, the two ends 182a, 182b of the pair of upper and lower suspensions 182, 183 in the width direction.
And 183a and 183b, floppy disk 1
The upper and lower surfaces 1a, 1b of the floppy disk 1 are vertically spaced farther apart from the upstream ends 182b, 183b in the rotation direction E than the downstream ends 182a, 183a. Is a vertically symmetrical substantially C-shaped inclined posture IL inclined at an opening angle θ ₄₁ toward the upstream side in the rotational direction E of the floppy disk 1 with respect to a horizontal reference WL parallel to the floppy disk 1. .

Then, as shown in FIGS. 22 and 28,
At the time of head loading, a pair of suspension lifters 20
A pair of upper and lower suspension supports 203
a, 204a is closed driven in the direction of arrow B from the open position P ₂₉ shown in FIG. 21 to the closed position P ₃₀ shown in FIG. 22, arrows a pair of upper and lower suspensions 182 and 183 to the closed position P ₃₀ by the spring force f When the pair of upper and lower magnetic heads 101 and 102 are soft-landed from the direction of arrow f to the head load position as shown by a solid line in FIG. 25, the pair of upper and lower suspensions 182 and 183 are driven.
Is twisted back in the direction of the arrow B in the width direction by the spring force, and when the opening angle of the inclined posture IL of the pair of upper and lower suspensions 182 and 183 with respect to the horizontal reference WL decreases from θ ₄₁ to θ _42. As described above, the downstream ends 101a, 102a of the pair of upper and lower magnetic heads 101, 102 are replaced with the upstream ends 101b,
Both upper and lower sides 1 of the floppy disk 1 before 102b
a and 1b can be soft-landed from the direction of arrow f.

FIGS. 23 and 24 show a second embodiment of the head attitude control mechanism 261. In this case, a pair of suspension lifters 20 are used.
A pair of upper and lower suspension supports 203
A pair of upper and lower suspension inclined support portions 264 and 265 are integrally formed on both upper and lower surfaces of a and 204a.
According to the second embodiment of the head attitude control mechanism 261, as shown in FIGS. 21 and 27, when the head is unloaded, the pair of suspension lifters 203,
204, a pair of upper and lower suspension supports 203a,
04a is driven to rotate in the direction of arrow A to an open position P _29,
When opened driven in the arrow e direction to the open position P ₂₉ against the spring force of the pair of upper and lower suspensions 182, 183, FIG. 2
25, and the pair of upper and lower suspensions 182 and 183 are tilted by the pair of upper and lower suspension tilt support portions 264 and 265 against the spring force of the above-mentioned opening angle θ ₄₁ as shown by the one-dot chain line in FIG. The posture IL can be supported in a highly stable state.

Then, as shown in FIG. 28, at the time of head loading, a pair of suspension lifters 203, 204
A pair of upper and lower suspension supports 203a, 204a
Closed position P ₃₀ but shown in FIG. 22 from the open position P ₂₉ shown in FIG. 21
Until being closed driven in the direction of arrow B, a pair of upper and lower suspensions 182 and 183 and closing drive in the direction of arrow f to the closed position P ₃₀ by the spring force, as shown by the solid line in FIG. 25, upper and lower pair of magnetic heads When soft-landing 101 and 102 to the head load position from the direction of arrow f, the pair of upper and lower suspensions 182 and 183 are twisted back in the direction of arrow B in the width direction by their spring force. ,
When the opening angle of the inclined posture IL with respect to the horizontal reference WL of 183 decreases from θ ₄₁ to θ ₄₂ , as described above, the downstream ends 101 a and 102 a of the pair of upper and lower magnetic heads 101 and 102 are moved to the upstream side. End portions 101b, 102
b, the upper and lower surfaces 1a, 1b of the floppy disk 1
Can be soft-landed from the direction of arrow f.

At this time, in particular, the head attitude control mechanism 2
According to the second embodiment of 61, as shown in FIG.
When the pair of upper and lower magnetic heads 101 and 102 is soft-landed on the upper and lower surfaces 1a and 1b of the floppy disk 1, the lower ends 101a and 102a of the pair of upper and lower magnetic heads 101 and 102
As shown in FIG. 24, a pair of upper and lower suspension inclined support portions 26 are provided until immediately before the upper and lower surfaces 1a and 1b come into contact with each other.
4, 265 are a pair of upper and lower suspensions 182, 183
It may have been supported in the high stable state to an open tilted position of the angle theta ₄₂ IL. Therefore, as shown by a solid line in FIG. 25, the downstream ends 101a and 102a of the pair of upper and lower magnetic heads 101 and 102 are replaced with the upstream ends 101b and 102.
b, the upper and lower surfaces 1a, 1b of the floppy disk 1
The operation for soft landing from the direction of arrow f can always be performed with high accuracy.

The above description has been directed to the rotary head lifting / lowering mechanism 201 of the present invention.
Can slide the pair of suspension lifters 203, 204 in the directions of arrows C, D, which are perpendicular to the pair of upper and lower suspensions 182, 183, without moving the pair of suspension lifters 203, 204 on the fulcrum pin 205 on the chassis 41. The pair of upper and lower suspensions 182 and 183 are opened and closed in the directions of arrows A and B by simply rotating (opening and closing) in the directions of arrows A and B, which are the upper and lower directions, with the pair of upper and lower magnetic heads 101 and
102 is configured to be driven up and down between a head loading position and a head unloading position.

Therefore, as compared with the conventional slide type head lifting / lowering mechanism, this rotary type head lifting / lowering mechanism 201 is used.
Has a simple structure, and can reduce cost and weight by reducing the number of parts and the number of assembly steps. And
The head lifting mechanism 201 of the rotation type uses a pair of suspension lifters 203 and 204 for a pair of upper and lower suspensions 182, like a head lifting mechanism of a slide type.
There is no need to slide the suspension lifters 203 and 183 at right angles to the suspension lifters 203 and 20.
The length of 4 can be made sufficiently shorter than that of the slide type head elevating mechanism, and the size reduction and weight reduction of the whole large-capacity floppy disk cartridge HFDC due to space saving can be greatly promoted.

Further, the head lifting mechanism 20 of this rotation type
1, a pair of suspension lifters 203, 204
Arrows A and B around the fulcrum pin 205 on the chassis 41
The upper and lower suspension support portions 203a and 204a are driven to open and close in the
When the opening and closing drive of the pair 2 and 183 is performed in the directions of the arrows e and f, unlike the slide type head lifting mechanism, the relative position of the pair of the upper and lower suspension supports 203a and 204a with respect to the pair of the upper and lower suspensions 182 and 183 in the directions of the arrows C and D. Since the relationship hardly changes (even if the change is very small), the pair of upper and lower suspensions 18
2 and 183 are opened and closed in the directions of arrows e and f, the pair of upper and lower suspensions 182 and 183 are moved by arrows C and D, respectively.
No inconvenience such as twisting in the direction occurs. Therefore,
The pair of upper and lower magnetic heads 101 and 102 can be stably soft-landed from the head unload position to the head load position.

Further, a pair of suspension lifters 20
3 and 204 are simply rotated in the directions of arrows A and B around the fulcrum pin 205 on the chassis 41 without any sliding in the directions of arrows C and D.
The rotating head lifting mechanism 201 for soft landing of the heads 1 and 102 from the head unloading position to the head loading position in the direction of arrow f is different from the sliding head lifting mechanism, unlike the sliding head lifting mechanism.
The soft landing speed can be easily controlled. Therefore, when the pair of upper and lower magnetic heads 101 and 102 is soft-landed on the upper and lower surfaces 1a and 1b of the floppy disk 1 from the direction of the arrow f, the pair of upper and lower magnetic heads 101 and 102 are removed. At a very slow safety speed, extremely safe and
Soft landing can be performed stably.

(12) Description of operation mode Next, this large-capacity floppy disk drive HFD
The operation mode in D will be described. .

First, in FIG. 29, when the loading of the large-capacity floppy disk cartridge HFDC is completed and the spindle motor 51 is turned on, the first slider 211 is slid in the direction of arrow H by the eject motor 80 via the transmission arm 226. Then, the second slider 215 is slid in the direction of arrow D via the direction changing means 219, and the pair of suspension lifters 203 and 204 of the head lifting / lowering mechanism 201 are moved in the direction of arrow B.
Direction, and a pair of upper and lower suspensions 182,
By 183, the pair of upper and lower magnetic heads 101 and 102 is soft-landed on the floppy disk 1.
At the same time, the first
Is latched, and its head load state is latched.

Next, in FIG. 30, when the head is unloaded after the recording and / or reproduction of data on the floppy disk 1 is completed, a current flows through the voice coil motor 109 of the linear actuator 103 and the head carriage 111 There is slid in the direction of the arrow a to the outermost circumferential position corresponding P ₂₇ of the floppy disk 1. And
The energization of the plunger 237 of the latch mechanism 235 is turned off.
F, the first slider 211 is slid in the direction of arrow G by the tension coil spring 229, and the pair of suspension lifters 203 of the head lifting mechanism 201
204 is driven to open and a pair of upper and lower suspensions 18 are driven.
A pair of upper and lower magnetic heads 101, 10 via
2 is head unloaded above and below the floppy disk 1. The head carriage 111 is moved by the lock arm 252 to a position P corresponding to the outermost periphery of the floppy disk 1.
Slide to ₂₇ to lock.

Next, when the power is turned off in the head loading state shown in FIG. 29, as shown in FIG.
Of the plunger 237 is turned off, the first slider 211 is slid in the direction of arrow G by the tension coil spring 229, and the head carriage 111 is moved by the lock arm 252 to the floppy disk 1.
It is the slide in the direction of the arrow a to the outermost circumferential side corresponding position P _27. Then, at the timing when the head carriage 111 is slid in the direction of arrow a, the pair of suspension lifters 203 and 204 are driven to open, and the pair of upper and lower magnetic heads 102 and 103 is moved via the pair of upper and lower suspensions 182 and 183. The head is unloaded to the load position.

Finally, the case where the host computer (personal computer) hangs up in the head load state shown in FIG. 29 will be described. If the host computer hangs up in this head load state, the eject switch will not be effective. The large capacity floppy disk cartridge HFDC cannot be ejected by the motor 80. Therefore, as shown in FIGS. 38 and 39, a forced eject operation is performed in which the slide plate 57 of the cartridge loading mechanism 58 is manually pushed in the direction of arrow a. Then, as shown in FIG. 38, the projection 233 of the slide plate 57 is
26, and is pushed in the direction of arrow a. At this time, as shown in FIG.
8 rotates in the direction of arrow J, but the tip 226a of the transmission arm 226 abuts on the bottom surface 41a of the chassis 41 and cannot be further rotated, so that the first slider 211 is integrated with the transmission arm 226. Are arrows a and G
Slide in the direction. Then, the rotary arm 236 of the latch mechanism 235 is forcibly rotated in the direction of arrow K in FIG. 31 by the rotary arm control unit 238 of the first slider 211, and the movable iron piece 241 is forcibly peeled off from the plunger 237. . Then, the first slider 211 is slid in the direction of arrow G by the tension coil spring 229, and the pair of upper and lower magnetic heads 101 and 102 is unloaded.

Next, in this large-capacity floppy disk drive HFDD, in order to suppress current consumption and to suppress wear of both the floppy disk 1 and the head chips of the pair of upper and lower magnetic heads 101 and 102, data is recorded and read. At the time other than during reproduction, the head load state is released and the head unload state can be maintained. Therefore, this operation is shown in FIGS.
This will be described with reference to the flowchart of FIG. The flowchart shown in FIG. 41 shows steps from the loading of the large-capacity floppy disk cartridge HFDC to the recording and / or reproduction of the large-capacity floppy disk HFD soft landing.

First, the flow chart shown in FIG. 42 explains the head unload operation after recording and / or reproducing data. When the recording and / or reproduction of the data is completed, a pair of upper and lower magnetic heads 101 is formed. , 102 perform a patrol seek (a patrol seek is an operation of moving several tracks every minute). After 3 minutes, commands from the host computer (idle command, standby command, sleep command)
Is sent, the pair of upper and lower magnetic heads 101 and 102 move to the outermost periphery of the floppy disk 1, and the latch mechanism 2
The power supply to the plunger 237 of 35 is once turned off, and the holding of the head loading state of the head lifting / lowering mechanism 201 is released (latched). Then, a pair of upper and lower magnetic heads 101 and 102 is
Is unloaded from the head.

FIG. 43 shows a flowchart at this time. Incidentally, the commands sent from the host computer to release the holding of the head load state of the head lifting mechanism 331 are the above-mentioned three types of the idle command, the standby command, and the sleep command. The modes are also divided into the following three types. Idle command: A mode in which the head is unloaded, but the spindle motor 51 is rotating, and current is supplied to the circuit, and the circuit can be operated by the next command. Standby command: A state in which the head is unloaded and the spindle motor 51 is also stopped. However, a current is supplied to the circuit, and the circuit can be operated by the next command. Sleep mode: The head is unloaded, the spindle motor 51 also stops, and the supply of current to the circuit is turned off.
Mode in which only the reset command is effective. Which command is sent depends on the host computer, but in the case of all commands, the head load is released.

Next, the flow chart shown in FIG. 44 shows that, after recording and / or reproduction of data, a command is sent from the host computer without performing patrol seek for three minutes, and immediately after the head loading mechanism 201 In this mode, the holding of the state is released. According to this mode, the wear of the floppy disk 1 and the pair of upper and lower magnetic heads 101 and 102 is further reduced. However, access may be delayed depending on the timing of recording and / or reproducing data again.

Next, the flowchart shown in FIG. 44 shows that, after recording and / or reproducing data, when the pair of upper and lower magnetic heads 101 and 102 is unloaded, the data is recorded and / or re-recorded in the disk-in state. In the case of reproducing, when an instruction command for recording and / or reproducing data is sent, as shown in FIG.
0 rotates in the direction of arrow P in the reverse direction, and the ejection drive pin 81
There back direction of the arrow P from the head loading position P ₃₂ to the initial position P _31. Thereafter, the ejection motor 80 rotates forward in the direction of arrow O, and the ejection drive pin 81 is moved to the position shown in FIG.
From the initial position P ₃₁ shown in 0 when it is rotated in the arrow O direction to the head loading position P _32, the first slider 211 is slidably driven in the arrow H direction via the transmission arm 226, the head elevating mechanism 201 Perform head loading operation,
The state is held by the latch mechanism 235.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made based on the technical concept of the present invention.

[0117]

The disk drive device of the present invention configured as described above has the following effects.

A first aspect of the present invention provides a rotation urging means for attaching one magnetic head to the tip of one suspension rotatably mounted on a head carriage, and for urging the one suspension to rotate toward a large-capacity floppy disk. Together with a height adjustment mechanism that adjusts the height of one of the suspensions, by adjusting the height of one of the suspensions, one of the magnetic heads attached to the tip of the one of the suspensions The height of the other magnetic head attached to the tip of the other suspension fixed to the head carriage can be freely adjusted according to the height of the large-capacity floppy disk. It is possible to prevent the output from dropping and reduce the damage of the large-capacity floppy disk.

According to a second aspect of the present invention, the height of the suspension can be adjusted together with the rotation urging means of the arm base by adjusting the height of one height adjusting screw. Can be easily adjusted.

According to a third aspect of the present invention, the height of the suspension can be adjusted together with the rotation urging means of the arm base by adjusting the height of the two height adjusting screws.
It is possible to adjust the alignment height of the pair of magnetic heads and to adjust the inclination of the pair of magnetic heads, such as the horizontality, so that it is possible to prevent a further decrease in output and reduce damage to a large-capacity floppy disk.

According to the fourth aspect, the height of the suspension can be adjusted together with the rotation urging means of the arm base by adjusting the height of the three height adjusting screws.
Adjustment of the alignment height of the pair of magnetic heads and adjustment of the inclination of the pair of magnetic heads in the three-dimensional direction can be performed, so that further reduction in output can be prevented and damage to the large-capacity floppy disk can be reduced. . Since the inclination can be adjusted in the three-dimensional direction, the dimensional accuracy of the product can be eliminated.

[Brief description of the drawings]

FIG. 1 shows a large capacity floppy disk to which the present invention is applied.
FIG. 2 is a plan view of a head carriage assembly structure for explaining a first embodiment of a drive height adjustment mechanism and a posture stabilization mechanism.

FIG. 2 is an exploded side view of the same head carriage assembly structure.

FIG. 3 is a partially cutaway side view showing a state where the head carriage assembly structure has been assembled.

FIG. 4 is an enlarged cross-sectional view taken along a line D-D in FIG.

FIG. 5 is a partially cutaway side view for explaining an upward adjustment of a head alignment height of a pair of magnetic heads in the first embodiment of the height adjustment mechanism.

FIG. 6 is a partially cutaway side view for explaining the downward adjustment of the head alignment height of the pair of magnetic heads in the first embodiment of the height adjustment mechanism.

FIG. 7 is a plan view of a head carriage assembly structure for explaining a height adjustment mechanism according to a second embodiment of the invention.

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a plan view of a head carriage assembly structure for explaining a third embodiment of the height adjustment mechanism and a second embodiment of the posture stabilization mechanism.

FIG. 10 is a plan view of a head carriage assembly structure for explaining a fourth embodiment of the height adjustment mechanism and a third embodiment of the attitude stabilization mechanism.

FIG. 11 is a plan view of a head carriage assembly structure for explaining a fifth embodiment of the height adjustment mechanism and a fourth embodiment of the attitude stabilization mechanism.

FIG. 12 is a partially cutaway side view for explaining an unstable posture element of the head carriage assembly structure.

FIG. 13 is a partially cutaway side view illustrating a state in which the postures of a pair of magnetic heads change due to unstable posture elements of the head carriage assembly structure.

FIG. 14 is an exploded perspective view illustrating a head assembly structure of a large capacity floppy disk drive to which the present invention is applied.

15 is an enlarged plan view of a main part of FIG.

FIG. 16 is a view as seen in the direction of arrows EE in FIG. 15;

17 is a cross-sectional side view taken along the line FF in FIG. 15;

18 is a cross-sectional side view taken along the line GG of FIG.

FIG. 19 is a cross-sectional side view similar to FIG. 17, illustrating a structure in which the center of gravity of the head movable portion supported by the gimbal plate is high.

FIG. 20 is a cross-sectional side view similar to FIG. 18, illustrating a structure in which the center of gravity of the head movable portion supported by the gimbal plate is high.

FIG. 21 is a front view for explaining a rotary head elevating mechanism in an embodiment of a large-capacity floppy disk drive to which the present invention is applied, and in particular, a first embodiment of a head attitude control mechanism. It is a front view of a suspension open state.

FIG. 22 is a front view of the suspension type closed state explaining the rotary head elevating mechanism of FIG. 1;

FIG. 23 is a front view illustrating a rotary head elevating mechanism of the rotation system according to the second embodiment, and is a front view particularly illustrating a suspension attitude of the second embodiment of the head attitude control mechanism.

FIG. 24 is a front view showing the suspension head driving mechanism of FIG. 3 during suspension suspension driving.

FIG. 25 is an enlarged front view of an essential part for explaining a soft landing operation of a pair of upper and lower heads by a head attitude control mechanism in the rotary head elevating mechanism of the rotating system.

FIG. 26 is a partially cutaway side view of the head retracting state for explaining the operation of the rotary head elevating mechanism of the above.

FIG. 27 is a partially cutaway side view of the head unloading state for explaining the operation of the rotary head elevating mechanism of the above.

FIG. 28 is a partially cutaway side view of a head loading state for explaining the operation of the rotary type head elevating mechanism of the above.

FIG. 29 is a plan view of a head loading state for explaining the entire rotary head elevating mechanism of the same.

FIG. 30 is a plan view of the head unloading state for explaining the entire rotary head elevating mechanism of the same.

FIG. 31 is a side view of an unlatched state for explaining a latch mechanism of the rotary type head elevating mechanism according to the first embodiment.

FIG. 32 is a side view of the latch mechanism for illustrating the latch mechanism in the latch state.

FIG. 33 is a plan view and a side view showing a first slider of the rotary head elevating mechanism of the above.

34A and 34B are a plan view and a side view showing a lock arm of the rotary type head elevating mechanism of the above.

FIG. 35 is a side view at the time of head unloading illustrating a selective drive mechanism of the rotary head elevating mechanism of the above.

FIG. 36 is a side view for explaining a head loading operation for explaining the selective drive mechanism of the above.

FIG. 37 is a side view for explaining a head unload operation for explaining the selective drive mechanism of the above.

FIG. 38 is a side view for explaining a state before the ejection of the selective driving mechanism and the cartridge loading mechanism is started.

FIG. 39 is a side view illustrating an ejecting operation of the selective drive mechanism and the cartridge loading mechanism according to the third embodiment.

FIG. 40 is a side view illustrating an operation position of an ejection drive pin of an ejection motor of the selective drive mechanism according to the embodiment.

FIG. 41 is a flow chart for explaining a head load when the first disk is inserted into the large capacity floppy disk drive.

FIG. 42 is a flowchart of performing a head unload operation after performing patrol seek for three minutes after data recording and / or reproduction.

FIG. 43 is a flowchart for performing head unloading without performing patrol seek for three minutes after data recording and / or reproduction.

FIG. 44 is a flowchart illustrating an operation of recording and / or reproducing data during standby in a disc-in state.

FIG. 45 is an external perspective view of a large-capacity floppy disk drive to which the present invention is applied.

FIG. 46 is a perspective view showing a state where the upper and lower covers and the front panel of the drive are disassembled.

FIG. 47 is a plan view of the same drive with an upper cover removed.

FIG. 48 is a plan view of the same drive with the cartridge holder removed.

FIG. 49 is a bottom view of the same drive with a lower cover removed.

FIG. 50 is a side view showing an unloading state of the cartridge loading mechanism of the above drive.

FIG. 51 is a side view showing a loading state of the cartridge loading mechanism of the above drive.

FIG. 52 is a plan view illustrating a linear actuator of the above drive.

FIG. 53 is a sectional view taken along the line AA in FIG. 52;

FIG. 54 is a plan view as viewed in the direction of arrows BB in FIG. 53.

FIG. 55 is a cross-sectional view taken along the line CC of FIG. 54.

FIG. 56 is an exploded perspective view of the guide spindle mounting device.

FIG. 57 is a perspective view illustrating an outline of a head carriage assembly structure.

FIG. 58 is a side view illustrating the insertion and removal of a cartridge between upper and lower magnetic heads.

FIG. 59 is a side view for explaining recording and reproduction of the cartridge inserted between the upper and lower magnetic heads.

FIG. 60 is an enlarged front view of a main part for explaining occurrence of a rolling phenomenon due to entrainment of an air flow at the time of soft landing of a head.

[Explanation of symbols]

HFDD is a large capacity floppy disk drive, HF
D, 1 are large capacity floppy disks, 101 and 102 are a pair of upper and lower magnetic heads, 110 is a head carriage assembly structure, 111 is a head carriage, 112, 1
13 is a pair of upper and lower head arms, 180 and 181 are a pair of upper and lower arm bases, 182 and 183 are a pair of upper and lower suspensions, 184 and 185 are a pair of upper and lower head bases, 186 is an upper head arm mount, 187 is a leaf spring, 189 is a torsion coil spring which is a rotation urging means;
0 is a horizontal reference table which is an arm receiving table, 270 is a height adjustment mechanism, 274, 282, 283, 287, 288, 289
Is a height adjusting screw.

Claims (4)

[Claims] 1. A magnetic head, wherein one of a pair of magnetic heads in contact with both sides of a large-capacity floppy disk is mounted on the tip of one of the suspensions rotatably mounted on a head carriage, and the other magnetic head is mounted on the head carriage. The one suspension is attached to a tip end of a suspension fixed to the head carriage, and the one suspension is rotationally biased toward the large-capacity floppy disk to a position substantially symmetric to the other suspension with respect to the large-capacity floppy disk by a rotational biasing means. A large-capacity floppy disk drive comprising: a height adjusting mechanism for adjusting the height of the one suspension relative to the large-capacity floppy disk together with the rotation urging means. Disk drive 2. A magnetic head according to claim 1, wherein one of a pair of magnetic heads in contact with both sides of the large-capacity floppy disk is mounted on the tip of one of the suspensions rotatably mounted on the head carriage, and the other magnetic head is mounted on the head carriage. The one suspension is attached to a tip end of a suspension fixed to the head carriage, and the one suspension is rotationally biased toward the large-capacity floppy disk to a position substantially symmetric to the other suspension with respect to the large-capacity floppy disk by a rotational biasing means. In the large-capacity floppy disk drive configured as described above, the one suspension is attached to the tip of an arm base, the arm base is rotatably attached to the head carriage, and the arm base is rotated by the rotation urging means. Force Configured to so that a height adjustment screw of one attached to the arm base,
A height adjustment for adjusting the height of the one suspension with respect to the large-capacity floppy disk together with the rotation urging means by an arm support provided on the head carriage so as to receive the height adjustment screw. Large capacity floppy disk drive characterized by a mechanism. 3. A magnetic head according to claim 1, wherein one of a pair of magnetic heads in contact with both sides of the large-capacity floppy disk is mounted on the tip of one of the suspensions rotatably mounted on the head carriage, and the other magnetic head is mounted on the head carriage. The one suspension is attached to a tip end of a suspension fixed to the head carriage, and the one suspension is rotationally biased toward the large-capacity floppy disk to a position substantially symmetric to the other suspension with respect to the large-capacity floppy disk by a rotational biasing means. In the large-capacity floppy disk drive, the one suspension is attached to the tip of an arm base, and the arm base is rotatably attached to the head carriage via a leaf spring. Armve Two height adjusting screws that are separately mounted on the left and right sides of the center of the arm base, and an arm provided on the head carriage so as to receive the height adjusting screws. A large-capacity floppy disk drive comprising a height adjusting mechanism for adjusting the height of the one suspension with respect to the large-capacity floppy disk together with the rotation urging means by a cradle. 4. One of a pair of magnetic heads contacting both surfaces of a large-capacity floppy disk is mounted on the tip of one of the suspensions rotatably mounted on a head carriage, and the other magnetic head is mounted on the head carriage. The one suspension is attached to a tip end of a suspension fixed to the head carriage, and the one suspension is rotationally biased toward the large-capacity floppy disk to a position substantially symmetric to the other suspension with respect to the large-capacity floppy disk by a rotational biasing means. In the large-capacity floppy disk drive, the one suspension is attached to the tip of an arm base, and the arm base is rotatably attached to the head carriage via a leaf spring. Armve A center of the arm base, a total of three height adjustment screws distributed to the left and right sides of the center, and the head carriage so as to receive the height adjustment screws. A height adjustment mechanism for adjusting the height of the one suspension with respect to the large-capacity floppy disk together with the rotation urging means by an arm support provided on the large-capacity floppy disk.・
drive.