JPH02132675A - Floppy disk driving device - Google Patents

Abstract

PURPOSE:To miniaturize a device by engaging a reference pin and a positioning column with a positioning hole formed at a disk jacket beforehand, and positioning a stabilizer with respect to a magnetic disk and a head. CONSTITUTION:A positioning hole 16 formed on a disk jacket 2 beforehand is engaged with a reference pin 15 protruded on a disk base 13, and a floppy disk 1 is normally set at a prescribed position. Next, respective positioning column 17 protruded on a supporting plate 9 are directly or indirectly abutted on the respective reference pins 15 and the disk base 13 deviating from the disk jacket 2, and a stabilizer 10 provided at the supporting plate 9 is correctly positioned with respect to a magnetic disk 3 and the head. Thus, the dimensions of the device in a width direction and in a plane direction can be decreased, and the device can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a floppy disk drive device, and more particularly to a floppy disk drive device having a 4 m structure for positioning a stabilizer with respect to a magnetic disk and a head.

[Conventional technology]

Generally, a floppy disk drive device 1 is used in various information processing devices as a means for recording and reproducing information on and from a floppy disk, which is an external recording medium.

In recent years, this type of floppy disk drive device has been used, for example, in electronic still cameras that convert images into magnetic signals and record them.

The floppy disk 1 on which recording is performed in the floppy disk drive [1] has a rectangular plastic disk jacket 2, as shown in FIG. A disk 3 is rotatably housed. A center hub 4 is fixed to the center of the magnetic disk 3, and a circular center hole 5 is provided in the center of the disk jacket 2 to rotatably hold the center hub 4 of the magnetic disk 3. It is perforated. The center hub 4 is exposed to the outside from the center hole 5 and is meshed with a spindle rotated by a spindle motor (not shown) attached to the disk base.The spindle motor drives the magnetic disk 3 into the disk jacket. It is designed so that it can be rotated internally. Further, on the side of the disc jacket 2,
A head window 6 is formed which is opened and closed by ivy 7. The shirt sleeve 7 is slidably attached along one edge of the disk jacket 2. Furthermore, arc-shaped relief recesses 8 for positioning members are formed at two locations on the outer portion of the head window 6 from the outer peripheral edge of the magnetic disk 3.

Further, in the floppy disk drive Hffi, a carriage (not shown) is provided which is movable in the axial direction with respect to a support shaft parallel to the parallel direction of the magnetic disks 3 and the racks. A head (not shown), which is located in the head window 6 of the disc jacket 2 and records and reproduces video information, is swingably mounted.

Furthermore, on the opposite side of the head with the floppy disk 1 in between, a stabilizing plate 10 attached to the lower surface of the support plate 9 is arranged so as to face the magnetic disk 3 with a predetermined gap therebetween. It is set up. This stabilizer plate 10 forms an air layer between the magnetic disk 3 and the magnetic disk 3.
The air pressure generated by the air flow that accompanies the rotation of the magnetic disk 3 pushes the magnetic disk 3 toward the head, bringing the tip of the head into proper contact with the magnetic disk 3, thereby creating a connection between the head and the magnetic disk 3. I try to minimize the subbasing loss as much as possible.

Further, the floppy disk 1 is inserted between the support plate 9 and the disk base when recording and reproducing information, and the floppy disk 1 is inserted between the support plate 9 and the disk base.
It is held in a predetermined position by fitting the positioning holes 16, 16 at the locations onto reference pins 15, 15 protruding from the disk base, respectively.

The stabilizing plate 10 needs to be accurately positioned with respect to the floppy disk 1 and the head. As shown in FIG. 8, the conventional positioning means for this purpose is to place a position on the lower surface side of the support plate 9 corresponding to a positioning member passing through the four relief portions 8 of the two bud positioning members of the head window 6. and positioning pins 11, 11 and 11, respectively, at positions corresponding to the center hub 4 of the magnetic disk 3.
... are formed protrudingly, and each of these positioning pins 11 is passed through the relief recess 8 and center hub 4 of each positioning member and brought into contact with the disk base, respectively.
The support plate 9 is positioned relative to the floppy disk 1 and the head, that is, the stabilizer plate 10 is positioned accurately.

Further, FIG. 9 shows another conventional positioning means, in which the support plate 9 is formed larger than the disk jacket 2,
Three positioning pins 11, 11, . . . are formed on the lower surface of the support plate 9 at positions outside the disk jacket 2. Positioning is performed by bringing each of the positioning pins 11 into contact with the disk base.

[Problem to be solved by the invention]

However, in the positioning means shown in FIG. The length dimension is greater than the thickness dimension of the disk jacket 2, and when inserting or removing the floppy disk 1, it is necessary to raise and retract the support plate 9 until the positioning pin 11 does not touch the disk jacket 2. Therefore, there is a problem in that the dimension in the thickness direction of the floppy disk 1 of the apparatus becomes large.

In addition, in the positioning means shown in FIG. 9, it is only necessary to move the support plate 9 up and down by the stroke in which the stabilizing plate 10 comes off the head window 6 of the disk jacket 2, so that the dimension in the thickness direction of the apparatus can be reduced. {i7 positioning pins 11 are all disk jacket 2
This poses a problem in that the planar dimensions of the device become larger than necessary.

The present invention has been made in view of these points, and provides a floppy disk drive device in which the dimensions of the device in the plane direction and thickness direction relative to the floppy disk can be reduced, and the size of the device can be reduced. The purpose is to

[Means to solve the problem]

To achieve the above object, a floppy disk drive according to the present invention! In the A position, a disk base having a protruding reference pin that is engaged with a positioning hole drilled in a disk jacket of a Flotsbee disk is disposed inside the device main body, and the magnetic disk in the disk jacket is A head for recording and reproducing information is disposed so as to be movable in a parallel direction of the tracks of the magnetic disk, and a stabilizing plate is attached on the opposite side of the head to press the magnetic disk against the head side by air pressure. In the floppy disk drive device, a floppy disk drive device is provided with a supporting plate provided with a floppy disk, in which a positioning collar is formed protruding from the supporting plate to support the stabilizing plate by contacting each of the reference pins, and A positioning collar for supporting the stabilizing plate with the Moeki disc base is formed protruding from a position outside the disc jacket 1.

(Function) According to the present invention, the floppy disk is oriented at a predetermined position by engaging the positioning hole formed in the disk jacket in advance with the reference pin protruding from the disk base, and then fixed to the support plate. By directly or indirectly bringing the protruding positioning collars into contact with the reference pins and the disk base from which the disk jacket has been removed, the stabilizing plate provided on the support plate can be accurately aligned with respect to the magnetic disk and head. It is used for positioning. Further, by adjusting the height position of the positioning ring, the distance between the stabilizer plate, the magnetic disk, and the head can be adjusted.

Therefore, the length of the positioning ring can be shortened, the movement of the support plate in the thickness direction of the floppy disk can be reduced, and the thickness direction of the device can be reduced. Since the positioning hole of the disc jacket is used to support the positioning collar, and only one positioning collar is disposed on the outside of the disc jacket 1, the dimension in the plane direction can also be reduced. This makes it possible to downsize the device.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 8.

1 to 3 show an embodiment of the present invention,
A flat disk base 13 is provided inside the floppy disk drive main body 12, and a spindle 14 connected to a spindle (not shown) is rotatably attached to approximately the center of the disk base 13. . A flat support plate 9 is disposed above the disc base 13, and at a position corresponding to the head window 6 of the disc jacket 2 on the lower surface of the support plate 9.
A stabilizer plate 10 is attached. This support plate 9 is movable up and down by a mechanism not shown, and is raised when the floppy disk 1 is inserted or taken out, and lowered when recording or reproducing information on the magnetic disk 3 to move the floppy disk 1 up and down. It is designed to be held between the disc base 13 and the disc base 13. Furthermore, three reference pins 15, 15, . . . are formed protruding from the upper surface of the disk base 13, as shown in FIG.

Each of these! Of the three reference pins 15, the two reference pins 15 at the top right and bottom in FIG.
It is arranged at a position corresponding to 16.

In this embodiment, the remaining reference pin 15 at the top left of FIG. 3 is disposed at a position outside the disc jacket 2 so as to form a triangle with each of the reference pins 15. Furthermore, positioning clicks 17.
17... are attached so as to protrude. As shown in FIGS. 4 and 5, each of these positioning collars 17 is
It is formed of a hollow main body 17a and an adjustment screw 19 screwed into a screw hole 18 at the tip thereof, and the inner surface of the tip of the positioning bell 17 and the head of the adjustment screw 19 are connected to each other. A spring 20 is disposed between them to prevent the adjustment screw 19 from loosening. Then, by rotating the adjusting screw 19 and causing the tip of the adjusting screw 19 to protrude from the tip of the positioning force run 17, the height, inclination, etc. of the support plate 9 and the stabilizing plate 10 relative to the disk base 13 are adjusted. It has been made possible to do so.

Note that when the positioning click 17 on the outer side of the disk jacket 2 is located at a position where it does not interfere with the insertion and removal of the floppy disk 1, the click 17a portion is omitted and only the adjusting screw 19 and the spring 20 are used. Alternatively, the reference pin 15 may be omitted and the disc base may be directly abutted.

Further, FIGS. 6 to 8 show an embodiment of a drive 171 II m of a floppy disk drive device according to the present invention, in which one side of the interior of the main body 12 has a threaded portion approximately in the center. A lead screw 21 in which a lead screw 21 is formed is disposed parallel to the track switching direction in the parallel direction of the tracks of the magnetic disk 3.
is rotatably supported by bearings 22, 22 fixed to the main suspension 12. This lead screw 21 has
A carriage 23 is attached to the lead screw 21 so as to be swingable and slidable in the axial direction, and a head 24 is mounted on the carriage 23 at a position corresponding to the head window 6 of the disk jacket 2. There is.

Note that the carriage 23 is connected to the disk base 13.
Although not shown, the head 24 is placed in the head window 6 through an opening formed in the disk base 13. Then, this carriage 23 swings around the lead screw 21, thereby causing the head 2
By moving the head 24 toward and away from the magnetic disk 3 and in the axial direction of the lead screw 21, the head 24 is moved in the 1/rack parallel direction of the magnetic disk 3.

In addition, the navigation lead screw 21 of the Moeki carriage 23
One end of an engaging leaf spring 25 is fixed at a position corresponding to , and an engaging pin 26 that is engaged with the threaded portion 21a of the lead screw 21 is attached to the tip of the engaging leaf spring 25. is installed. Further, a driving gear 27 is fixed to one end of the Moeki lead screw 21.
A pinion 29 fixed to the output shaft of a stepping motor 28 is connected to the drive gear 27 via a reduction gear group 30 . Furthermore, an axial displacement adjusting screw 31 for rotationally holding the lead screw 21 in a predetermined position is abutted on one end of the lead screw 21, and a plate is attached on the other end of the lead screw 21. Spring 3
2 are in contact with each other, and by rotating and adjusting the axial position adjustment screw 31, the absolute displacement of the head 24 with respect to the magnetic disk 3 can be adjusted.

Further, at a position opposite to the lead screw 21 with respect to the head 24 of the carriage 23, that is, above the swinging tip, there is a shaft that abuts the upper end surface of a swing position adjustment screw 33 screwed into the carriage 23 in ten directions. A guide pin 34 is horizontally mounted to properly position and abut the head 24 against the magnetic disk 3 during recording and reproduction of information. A contact spring 35 is attached that biases the head 23 in a direction that always brings the head 23 into contact with the guide pin 34, that is, in a direction that brings the head 24 into contact with the magnetic disk 3.

Further, an evacuation lever 36 is disposed near the swinging tip of the carriage 23 so as to be able to swing freely about a pivot 37. An arm 38 that can be freely moved toward and away from the body is integrally formed. Further, between the main body 12 and the retraction lever 36, there is a retraction spring 39 that always urges the carriage 23 in a direction away from the guide pin 34, that is, in a direction that moves the head 24 away from the magnetic disk 3.
In this embodiment, the force of the retraction lever 36 to separate the head 24 from the magnetic disk 3 is set to be greater than the force that causes the head 24 to come into contact with it. A plunger 41 of an electromagnetic actuator 40 is connected to the evacuation lever 36 via a connecting pin 42. When the electromagnetic actuator 40 is turned on, the plunger 41 is attracted, and the evacuation lever 36 is activated. The arm 38 is rotated in a direction away from the carriage 23 against the biasing force of the retraction spring 39. Conversely, the electromagnetic actuator 40 is
By setting the retraction lever 36 to FF, the retraction spring 3
The arm 38 is rotated in the direction of pressing the carriage 23 by the biasing force 9.

Next, the operation of this practical example will be explained.

In the floppy disk drive device, when the floppy disk 1 is not inserted into the device, the support plate 9 is held in a raised position as shown in FIGS. 2 and 3, and when the floppy disk 1 is inserted, As shown in FIG. 5, the support plate 9 is lowered to hold the floppy disk 1 between it and the disk base 13. As shown in FIG. In this state, each reference pin 15 and each tD positioning collar 17 are inserted into the two positioning holes 16 of the disc jacket 2, and positioning is performed.

That is, the disk jacket 2 of the floppy disk 1 is positioned by the reference pin 15 and the positioning hole 16, and the positioning of the stabilizer 10 with respect to the magnetic disk 3 on a plane is performed by the collar body 17a of the positioning collar 17 and the positioning hole 16. It is done. Then, the lower surface of each adjustment screw 19 of the three positioning collars 17, 17... comes into contact with each reference pin 15, so that the stabilizer plate 10 is oriented at an appropriate distance with respect to the magnetic disk 3 and head 24. . In this embodiment, the position is regulated by two positioning clicks 17 and 17 inserted into the two positioning holes 16 and 16 of the disk jackets 1 and 2 of the floppy disk 1, and the other positioning ring 17 is The position in the thickness direction is regulated by the three pieces including the above. In this case, in order to adjust the distance between the stabilizing plate 10 of the support plate 9 and the magnetic disk 3 and head 24, the adjusting screw 19 is rotated using a driver or the like, and the positioning ring 17 of the adjusting screw 19 is rotated. Adjust the protrusion from the tip of the support plate 9 by adjusting the protrusion from the tip of the collar body 17a.
This is done by moving the disk relative to the disk base 13. Further, while the floppy disk 1 is being inserted, the shutter 7 is slid by a mechanism (not shown) and the head window 6 is opened to maintain a state in which information can be recorded.

When recording and reproducing information on the magnetic disk 3, the spindle motor is driven to avoid rotating the spindle 14 of the disk base 13, so that the magnetic disk inside the disk jacket 2 is transferred via the hinter hub 4. Rotate. On the other hand, the electromagnetic actuator 40
Turn on the plunger 41 and pull the evacuation lever 3.
Separate the arm 38 of No. 6 from the top surface of the carriage 23,
The carriage 23 is swung upward about the lead screw 21 by the biasing force of the contact spring 35, and the oscillation initial position adjustment screw 33 screwed into the carriage 23 is brought into contact with the guide pin 34, and the head 24 The magnetic disk 3
make proper contact with the

In this state, an air layer is formed between the upper surface of the magnetic disk 3 and the stabilizing plate 10, and the air pressure generated by the rotation of the magnetic disk 3 moves the magnetic disk 3 toward the head 24. The magnetic disk 3 and the head 24 are pressed so that they are brought into proper contact with each other. In this state, the head 24 records and reproduces information on the magnetic disk 3.

In addition, when switching the track of the head 24 on the magnetic disk 3, a predetermined number of pulses are sent to the stepping motor 28 to cause it to rotate forward or backward, and the pinion 29, reduction gear group 30, and drive gear #J are rotated. Rotate the lead screw 21 by a predetermined center angle via 1a27,
The head 2 is moved by moving the engagement position between the threaded portion 21a of the lead screw 21 and the engagement pin 26 in the axial direction of the threaded portion 21a.
4 together with the carriage 23 in the parallel direction of the tracks of the magnetic disk 3.

When recording or reproducing information on the magnetic disk 3 is to be stopped, the electromagnetic actuator 40 is turned OFF, and the retracting lever 36 is rotated to pull out the plunger 41 by the biasing force of the retracting spring 39. Then, the arm 38 of the retracting lever 36 presses the carriage 23 against the biasing force of the contact spring 35 to separate the head 24 from the magnetic disk 3. This allows the head 24 to be separated from the magnetic disk 3 when unnecessary, thereby reliably preventing damage and deformation of both.

As described above, in this embodiment, the reference pin 15 is engaged with the positioning hole 16 previously formed in the disc jacket 2, and the positioning collar 17 corresponding to this reference pin 15 is brought into contact with the stabilizer plate 10. magnetic disk 3
Since the positioning with respect to the head 24 is performed accurately, the length of the positioning collar 17 can be shortened, and the amount of elevation 11i1ffi of the support plate 9 can be reduced.
o) The rq-t dimension can be reduced. Further, the positioning hole 16 of the disk jacket 2 is used to support the positioning collar 17,
Since only one positioning collar 17 is disposed on the outside of the disc jackets 1 and 2, the dimension in the plane direction can also be reduced, and as a result, it is possible to easily downsize the device. Become.

Although the above embodiment shows the case where the floppy disk 1 is mounted on a horizontal surface, it may be mounted in a different state such as vertically.

Furthermore, the present invention is not limited to the above embodiments,
It can be changed as necessary.

〔Effect of the invention〕

As described above, the floppy disk drive device according to the present invention accurately positions the stabilizer with respect to the magnetic disk and the head by engaging the reference pin and the positioning ring with the positioning holes formed in the disk jacket in advance. Therefore, the length of the mounting plate can be shortened, reducing the amount of hanging of the support plate, and reducing the thickness of the floppy disk in the device. .

Moreover, since the positioning hole of the disc jacket is used to support the positioning collar, and only one positioning collar is disposed outside the disc jacket, the dimension in the plane direction can also be reduced.
It is possible to reduce the size of the device, the structure is simpler than the conventional one, and the cost is also low.

[Brief explanation of the drawing]

1 to 8 show an embodiment of the floppy disk drive device of the present invention, in which FIG. 1 is a plan view of the support plate portion, FIG. 2 is a vertical sectional view of the support plate portion, and FIG. The figure is a plan view of the disk base, Figure 4 is an enlarged view of the positioning part before the floppy disk is installed, Figure 5 is an enlarged sectional view after the floppy disk is installed, Figure 6 is a plan view of the drive mechanism, Figure 7 is a sectional view taken along the line ■-■ in Figure 6.
The drawings are the feather arrow diagram of FIG. 6, and FIGS. 9 and 10 are plan views showing conventional positioning means, respectively. DESCRIPTION OF SYMBOLS 1... Floppy disk, 2... Disk jacket, 3... Magnetic disk, 6... Head window, 7... Shutter, 9... Support plate, 10... Stabilizer plate, 12... ...5A mounting body, 13...disk base, 14...spindle, 15...reference pin, 16...
...Positioning hole, 17...Positioning hole, 17a.
...Current body, 19.Adjustment screw, 23.Carriage, 24.Head.

Claims (1)

[Claims] A disk base having a protruding reference pin that is engaged with a positioning hole drilled in a disk jacket of a floppy disk is disposed inside the device main body, and information is recorded on a magnetic disk within the disk jacket. A reproducing head is disposed so as to be movable in a parallel direction of the tracks of the magnetic disk, and a supporting plate is provided on the opposite side of the head to which a stabilizing plate is attached for pressing the magnetic disk toward the head by air pressure. In the floppy disk drive device, a positioning collar is formed protruding from the support plate to support the stabilizing plate by abutting on each of the reference pins, and at a position outside the disk jacket of the support plate. . A floppy disk drive device, characterized in that a positioning collar for supporting the stabilizing plate with the disk base is formed in a protruding manner.