JPH0547910B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a magnetic recording and reproducing device for recording and reproducing information on a disk-shaped magnetic recording medium (hereinafter abbreviated as magnetic disk), and particularly relates to an improvement in a disk jacket loading section. .

[Prior art]

In recent years, recording and reproducing devices using small magnetic disks as recording media have come to be widely used as information recording or image recording devices for small computers.

FIG. 1 is a perspective view showing a part of a conventional magnetic disk recording/reproducing apparatus of this type. First, the configuration of the magnetic disk jacket section 100 will be explained. A magnetic disk 101 made of a flexible polyester base or the like coated with magnetic recording medium components is fixed to a center core 102 and rotatably housed in a jacket 103 made of rigid plastic. Note that the disk 101 and center core 102 are rotatable within the jacket 103. Holes 104 and 105 for chucking the center core 102 and holes 106 and 107 for inserting a magnetic head and the like are provided in the center of both the front and back walls of the jacket 103. When not in use, the holes 106 and 107 are closed by a shutter 108 and locked by a locking device (not shown). In this way, dust and the like are prevented from adhering to the surface of the disk 101 when the disk 101 is not in use. Furthermore, jacket 103
is provided with a frame counter dial 109. This frame counter dial 109 is for displaying the number of recorded tracks, and is used when recording images.

Next, the configuration of the recording/reproducing apparatus main body 200 will be explained. A disk drive motor 202 is fixed to the central portion of the chassis 201. A chuck magnet 204 is coaxially attached to the spindle 203 of the disk drive motor 202. The spindle 203 and the chuck magnet 204 are designed to rotate around a fixed shaft 205. Further, a regulation plate 206 is fixed to the chassis 201, and this regulation plate 20
6 is provided with regulating pins 207 and 208. A magnetic head 210 is housed in a hole 209 provided in the regulating plate 206 with its tip slightly protruding from the regulating plate 206 . magnetic head 2
The head 10 is fed in the radial direction of the disk drive motor 202 by a head feeding mechanism (not shown).

First holder 211 for chassis 201
A second holder 212 is rotatably attached via a shaft 213. A holding plate 215 including a stabilizing plate 214 is attached to the inner surface of the first holder 211 . The above retaining plate 21
A pulse generator coil (hereinafter abbreviated as PG coil) 216 for detecting the rotational position of the magnetic disk 101 is fixed to 5 . In addition,
The retaining plate 215 has three adjustment screws 217, 21.
8 and 219, the regulation pins 207 and 208 provided on the chassis 201 side and the fixed shaft 20
5, the position is adjustable. Note that the retaining plate 215 is attached to the first holder 211,
It is supported via a position-adjustable elastic member (not shown).

On the other hand, the second holder 212 has bent portions 220 and 221 on both sides thereof, and is designed to guide the disk jacket 103. A pin 222 is provided inside the bent portion 220. This pin 222 is connected to the shutter 1.
It is planted at a position corresponding to 08. A large notch 2 is provided on the wall surface of the second holder 212.
23 are provided.

Note that as shown in the figure, the first holder 211 is
The structure is such that it surrounds the holder 212.

Next, the operation of the conventional example configured as described above will be briefly explained. In the state shown in FIG. 1, when the magnetic disk 101 is inserted into the second holder 212 from one end side as shown by the dashed-dotted arrow, in the process, the shutter lock device (not shown) is released and the shutter 108 is locked at the same time. 222
released by. Next, the first holder 211
With the chassis 201 and the chassis 201 substantially parallel to each other, they are locked by a locking mechanism (not shown).
In this state, the disk jacket 103 is positioned and supported with respect to the chassis 201 by a reference pin (not shown) or the like. magnetic disk 1
A center core 102 located at the center of the disc drive motor 2 is connected to a
It is fixed to the spindle 203 of 02. The magnetic disk 101 is located within a space created by the regulating plate 206 and the stabilizing plate 214. When the disk drive motor 202 is rotated at a high speed (usually 3600 RPM) in this state, the disk 101 is stably guided by the regulating plate 206 and the stabilizing plate 214 and comes into stable contact with the magnetic head 210. This is mainly because an air layer is formed between the stabilizer plate 214, the regulating plate 206, and the disk 101 as the disk 101 rotates at high speed. In this way, information can be recorded and reproduced on the disk 101 by the magnetic head 210.

The reason why the holders 211 and 212 have a double structure is that the stabilizing plate 214 is attached to the jacket 1.
This is because it is necessary to penetrate deeply into the disk 101 and to approach the disk 101. Incidentally, for example, when the stabilizer plate 214 is fixed to the second holder 212, the jacket 1 is attached to the second holder 212.
Insertion and removal of 03 will be obstructed by the stabilizing plate 214. Therefore both holders 21
1,212 has a double structure, and the first holder 21
1 compared to the second holder 212, the chassis 20
1, it is configured to rotate more greatly.

Note that the actual rotation angle of the holders 211 and 212 is smaller than that shown in FIG. In other words,
The above angle is the angle between the jacket 103 and the second holder 2.
12, when inserting or removing the spindle 2
It is sufficient that the jacket 103 does not come into contact with the jacket 103 or the regulating plate 206.

In the conventional magnetic recording/reproducing device as described above, an adjustment screw or the like is required on the first holder 211 in order to arrange the stabilizer plate 214 close to the magnetic disk 101, which poses an obstacle to making the device thinner. I was getting used to it. Furthermore, since the holder has a double structure and requires a large rotation angle, it is possible for dirt to enter the device when it is open, or for operator error to apply a larger external force, resulting in damage. It was easy to occur. Furthermore, since the regulation plate 206 was of a fixed type, the disk drive motor 2
It is necessary to adjust the installation height of 02 and match the relative position with the regulation plate through high-precision machining.
This was causing an increase in costs.

〔the purpose〕

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording and reproducing device that allows adjustment of the regulating plate with a simple configuration, eliminates the need for providing adjustment screws, etc. on the holder, and can be made thinner.

〔overview〕

In order to achieve the above object, the present invention is characterized by the following configuration. That is, a flexible disk-shaped magnetic recording medium, a motor that rotationally drives the magnetic recording medium, a regulating plate whose flat portion is disposed close to one side of the magnetic recording medium,
a stabilizing plate disposed close to the magnetic recording medium at a position facing the regulating plate and the magnetic recording medium; a member that limits the distance between the regulating plate and the stabilizing plate; It is characterized by comprising an elastic body that presses toward the regulating plate with elastic force, and an adjusting means that adjusts the distance between the regulating plate and the magnetic recording medium on the regulating plate side.

〔Example〕

2 is a plan view showing the configuration of an embodiment of the present invention, FIG. 3 is a view of a portion of FIG. 2 viewed from the direction of arrow A, and FIG. 4 is a view of a portion of FIG. 2 viewed from the direction of arrow B. This is a diagram seen from. In FIGS. 2 to 4, angles 302 and 303 are fixed to a chassis 301. As shown in FIGS. Support shafts 305 and 306 are fixed to both sides near the left end in the figure of the first holder 304 located on the chassis 301, and these support shafts 305 and 306 are connected to the angle 3, respectively.
It is rotatably supported with respect to 02 and 303.
Further, a second holder 307 is rotatably supported on the first holder 304 by a support shaft 308 . A guide shaft 309 is fixed to the second holder 307, and the head of the guide shaft 309 is adapted to fit into the hole 310 of the first holder 304 on both sides. In other words, the second holder 307 holds the guide shaft 3 within a certain angle range, that is, within the hole 310 with the support shaft 308 as a fulcrum.
09 can rotate within a freely movable range.

Further, the first holder 304 has a wire spring 31.
1 is fixed, and a bent part 312 is formed at the tip of this wire spring 311 as a shutter closing drive member, and this bent part 312 passes through the hole 314 of the first holder 304 Holder 3
It's inside 07.

Further, a second holder 3 is attached to the guide shaft 309.
A pin portion 315 is provided as a convex portion for releasing the shutter lock mechanism, which extends inward of the shutter lock mechanism. The second holder 307 has bent portions 316 and 317.
is formed to guide the jacket 103.

The first holder 304 is provided with a bent portion 318 . A lubricating sheet 319 is attached to the inside of the first holder 304 near this bent portion 318 to reduce friction when the magnetic disk 101 is inserted and removed.

Further, as shown in FIGS. 2 and 3, one end of the four leaf springs 320, 321, 322, 323 is fixed to the first holder 304, and the other end is attached to the jacket 103 when the magnetic disk 101 is inserted.
It is coming into contact with the

Figure 5 shows a different part from Figure 3 by arrow A in Figure 2.
It is a figure seen from the direction. As shown in FIGS. 2 and 5, the first holder 304 has a bent portion 32.
4 is formed. Further, a PG coil 326 is attached to a portion 325 of this bent portion 324.

On the other hand, one end of the adjustment plate 327 is fixed to the first holder 304 with a screw 328, and the other end is engaged with the tip 329 of the bent portion 324 of the first holder 304. By restricting the bending portion 324 from bending inward due to elastic force with the screw 330, a portion 325 of the bending portion 324 is prevented from coming into contact with the center core 102 of the magnetic disk 101. In other words, the bent portion 324 is the fifth
It is bent inward from the state shown in the figure, and is pulled back within the elastic range by the adjustment plate 327.

A disk drive motor 331 is fixed to the chassis 301. In addition, the above-mentioned dike drive motor 33
A chucking magnet 333 is fixed to the spindle 332 of No. 1, and the chucking magnet 333 connects the magnetic disk 101 to the disk drive motor 33 via the center core 102.
It is combined with 1. A part of the magnetic flux of the tracking magnet 333 leaks from the yoke 110 above the center core 102, and is detected by the PG coil 326 as it rotates.

FIG. 6 is a plan view showing a state in which parts related to the first holder 304 and parts related to a stabilizer plate, which will be described later, are removed from FIG. 2. A reference pin 334 and reference pieces 335, 336 fixed to the chassis 301 are used to position the jacket 103 of the magnetic disk 101. Further, a frame counter drive pin 337 that is rotationally driven by a drive mechanism (not shown) is adapted to engage with the frame counter 109 of the magnetic disk 101.

The head base 338 is supported slidably in the direction of the arrow with respect to the chassis 301, and the above-mentioned top counter drive pin 337 is supported through a mechanism (not shown).
It is moved by the same drive system.
A magnetic head 339 is fixed to the head base 338, and this magnetic head 339 comes into contact with the magnetic disk 101 through a hole 341 provided in a regulating plate 340.

FIG. 7 is a view of a different portion from FIGS. 3 and 5 as viewed from the direction of arrow A in FIG. 2, and is a view showing the structure of the regulation plate 340. The regulation plate 340 includes screws 342, 343, 344 and a compression spring 34.
5,346,347 on the chassis 1. Thus, the chassis 3 of the regulation plate 340
Adjustment of position, height and inclination for 01 is as follows:
This is possible by adjusting the three screws 342, 343, and 344 mentioned above. Further, the regulation plate 340 is formed with a flat part 348 serving as a regulation part and two convex parts 349 and 350.

On the other hand, as shown in FIG. 2 and FIG.
It is attached by 54. In addition, the above-mentioned pillar 35
3, 354 and the leaf spring 352 are supported in an engaging relationship with a certain degree of freedom. Leaf spring 35
The other end of 2 is fixed to an arm 355, and the arm 355 is rotatably supported by the angle 302 and the adjustment angle 356. Further, a hole 357 is formed in the arm 355, and a hole 358 is also formed in a part of the first holder 304. In addition, the connecting arm 359 is connected to the support shaft 3.
The portion 3 extending downwardly of the angle 302 by 60
61 so as to be rotatable. Pins 362 and 363 are fixed to this connecting arm 359. These pins 362 and 363 are connected to the holes 35
7,358. In other words, the first holder 304 and the arm 355 are interlocked. Note that since the lever ratio (ratio of the lengths of the fulcrum and the point of action) is set appropriately, the arm 355 will rotate more with respect to the rotation of the first holder 304, for example. ing.

FIG. 8 is a side view showing the first holder 304 opened by a spring (not shown). As is clear from the figure, the connecting arm 3
59, the leaf spring 352 and the arm 355 that support the stabilizing plate 351 can be rotated to a greater extent than the opening angle of the first holder 304.

FIG. 9 is a view of a portion of FIG. 2 viewed from the direction of arrow C. One end of the adjustment angle 356 is fixed to the chassis 301 via a spacer 364. Further, the screw 365 is engaged with the collar 301. The above adjustment angle 356 and chassis 301
A compression spring 365 is inserted between them, and a notch 366 is provided in the middle of the adjustment angle 356. By adjusting (rotating) the screw 367, the notch 366 is deformed while the arm 355 moves up and down through the hole 368 forming one fulcrum.

As mentioned above, the stabilizing plate 351 is connected to the leaf spring 352.
Due to the action of the convex portions 349, 350 of the regulating plate 340
is being forced to. Note that the first holder 3
04 is in the state shown in FIG. 7, and is held locked by a locking mechanism (not shown).
It rotates while being guided by a flat part 348 and a stabilizing plate 351.

Next, the operation of this embodiment will be explained. When the locking mechanism (not shown) is released from the state shown in FIG. 2, the first holder 304 becomes the state shown in FIG. 8.
In this state, when the magnetic disk jacket 103 is inserted into the space surrounded by the first holder 304, its bent portion 318, and the bent portions 316 and 317 of the second holder 307, the shutter 108 first releases the wire spring 311. However, this spring force does not release the shutter lock mechanism (not shown). Therefore, only the wire spring 311 escapes and the shutter 108 remains as it is. When the magnetic disk 101 is further inserted, the pin portion 315 of the guide shaft 309 releases the shutter lock mechanism, and then the shutter 108 is opened. When the disk jacket 103 is pushed all the way in, the bent portion 312 of the wire spring 311 engages with a hole (not shown) provided in the side surface of the shutter 108.

When the disk jacket 103 is pulled out from the inserted state, the shutter 108 is moved by the wire spring 311.
It moves to the position where it is held by the bending part 312 and locked again. Note that when taking out the shutter 108, the bent portion 312 must be pulled out again from the hole in the side surface of the shutter 108, so a load or weight is applied, but it is not large enough to cause discomfort to the user.

When the first holder 304 is rotated toward the chassis 301 while the disk jacket 103 is pushed in as described above, the disk jacket 103 supported by the first holder 304 also rotates. When the first holder 304 is locked by the locking mechanism, the first holder 304 is
The shape will be as shown in FIG. 7 and FIG. 9.
In other words, the disk jacket 103 is the chassis 3.
Reference pin 334 and reference piece 33 on 01
5,336. At this time, the leaf spring 320 fixed to the first holder 304,
321, 322, 323, the disk jacket 103 is attached to the reference pin 334 and the reference piece 3.
35,336. Also, the stabilizer plate 35
1 is a leaf spring 35 as shown in FIGS. 7 and 9.
2, it is pressed against the convex portions 349, 350 of the regulating plate 340 and stably supported. Furthermore, at this time,
By adjusting the screws 342, 343, and 344, the height of the flat portion 348 of the regulating plate 340, that is, the relative position with respect to the magnetic disk 101, can be adjusted. At the same time, the position of the stabilizing plate 351, that is, the distance from the magnetic disk 101, etc., are adjusted.
Note that the inclination of the stabilizer plate 351 can be adjusted by adjusting the screw 367 of the adjustment angle 356. In other words, the stabilizing plate 351 is the leaf spring 35
Since it has a large degree of freedom in one direction compared to 2, it is restricted in one direction by two points, that is, convex parts 349 and 350, and the leaf spring 352, that is, the arm 35
The inclination in the other direction is determined by the inclination of the support shaft No. 5.

Furthermore, since the locking mechanism (not shown) has a structure that requires overstroke, the locking mechanism cannot be locked unless the first holder 304 is pushed past the state substantially parallel to the chassis 301 (the state shown in FIG. 5). Therefore, in FIG. 5, the center core 102 and a portion 32 of the first holder 304
There is a gap between 5 and 5, but at the time of overstroke, the gap disappears and the 1st
The holder 304 is pushed into the chuck magnet 333 of the center core 102 by the spring force of the bent portion 324 of the holder 304. This makes chatting more reliable.

After that, when the state shown in FIG. 5 is reached, the first holder 3 is adjusted by the adjustment plate 327.
The gap between the center core 102 and the PG coil 326 attached to the PG coil 325 can be adjusted to a minimum. For this reason,
The output of the PG coil 326 can be stabilized in a large state, making it possible to reduce the cost of a detection circuit (not shown), etc., and stabilizing the operation.

Note that since the arm 355 is engaged with the connecting arm 359 so that the rotation angle is larger than the rotation angle of the first holder 304, as shown in FIG. When detached, the stabilizer plate 351 is attached to the disk jacket 103.
will no longer exist on the approach road. Therefore, insertion and removal operations can be performed without any problems. As shown in FIG. 7, when the first holder 304 is locked, the stabilizer plate 351 enters into the jacket 103, so the magnetic disk 10
It can be located close to 1.

In the above embodiment, in order to keep the distance between the regulating plate 340 and the stabilizing plate 351 constant, the convex plate 34 is
9,350, but as shown in FIG. 10, there is one more point on the outside of the disk jacket 103.
A protrusion 401 may be provided and the stabilizer plate 351 may be pressed against it. In this case, it is necessary to use only one support column 353, for example, as shown in FIGS. 11a and 11b, so that the stabilizing plate 351 and the leaf spring 352 can be freely coupled in any direction.
Note that the pin 402 is a pin for regulating the position of the stabilizing plate 351 in the width direction. By doing this, although the size in the plane direction increases slightly, adjustment of the adjustment angle 356 and the like becomes unnecessary and can be rationalized.

Furthermore, as shown in FIGS. 12 to 15, if the heights of the protrusions 349, 350, and 401 are made screw-type or setscrew-type (403 in FIG. 15) so that their heights can be adjusted, the machining accuracy can be loosened. In addition, the distance between the regulating plate 340 and the stabilizing plate 351 can be set to an optimum state.

〔Effect of the invention〕

As described above, according to the present invention, there is provided a flexible disc-shaped magnetic recording medium, a motor for rotationally driving the magnetic recording medium, and a flat portion disposed close to one side of the magnetic recording medium. a regulating plate, a stabilizing plate disposed close to the magnetic recording medium at a position facing the regulating plate and the magnetic recording medium, and a member for limiting the distance between the regulating plate and the stabilizing plate. , an elastic body that presses the stabilizing plate in the direction of the regulating plate with elastic force, and an adjusting means that adjusts the distance between the regulating plate and the magnetic recording medium on the regulating plate side, so that the regulating plate can be adjusted with a simple configuration. It is possible to provide a magnetic recording/reproducing device that is adjustable and can be made thinner without the need to provide an adjustment screw or the like on the holder.

[Brief explanation of drawings]

Figure 1 is a plan view showing the configuration of a conventional example, Figures 2-
FIG. 9 is a diagram showing an embodiment of the present invention, FIG. 2 is a plan view showing the overall configuration, FIGS. 3, 5, and 7.
The figures are partially seen from the direction of arrow A in Fig. 2, Fig. 4 is a partially seen view from the direction of arrow B in Fig. 2, and Fig. 6 shows the first holder and FIG. 8 is a plan view showing the state in which the parts related to the stabilizing plate have been removed; FIG. 8 is a view showing the first holder in an open state; FIG. 10 to 15 are diagrams showing modifications of the present invention. 100...Magnetic disk jacket part, 108
... Shutter, 200 ... Magnetic recording and reproducing device main body, 301 ... Chassis, 304 ... First holder, 307 ... Second holder, 311 ... Wire spring, 312 ... Bending part (for shutter closing drive) member), 315...pin part (shutter lock mechanism release convex part), 340... regulation plate, 342-344
...Screw, 345-346...Compression spring.

Claims (1)

[Scope of Claims] 1. A flexible disk-shaped magnetic recording medium, a motor that rotationally drives the magnetic recording medium, and a regulating plate with a flat portion disposed close to one side of the magnetic recording medium. a stabilizing plate disposed close to the magnetic recording medium at a position facing the regulating plate and the magnetic recording medium; a member for limiting the distance between the regulating plate and the stabilizing plate; 1. A magnetic recording and reproducing device comprising: an elastic body that presses a plate toward the regulating plate with elastic force; and an adjusting means that adjusts the distance between the regulating plate and the magnetic recording medium on the regulating plate side. 2. The members that limit the distance between the regulating plate and the stabilizing plate are:
The magnetic recording and reproducing device according to claim 1, characterized in that the magnetic recording and reproducing device is provided at three points that are not on a straight line. 3. The members that limit the distance between the regulating plate and the stabilizing plate are:
2. The magnetic recording and reproducing apparatus according to claim 1, further comprising means for adjusting the inclination of the stabilizer plate provided at one or two points. 4. The magnetic recording medium is held by a rotatable holder, the stabilizer is supported by an arm whose base end is engaged with the holder, and the engaging part has a rotation angle of the arm that is smaller than the rotation angle of the holder. 2. The magnetic recording and reproducing device according to claim 1, wherein the magnetic recording and reproducing device is configured such that the angle of movement is large.