JPH10320965A - Floppy disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floppy disk device that does not transfer deformation to a device substrate even when the surface accuracy and the pitch dimensions of the FDD(floppy disk) mounting bracket, for example, of a computer are poor, does not generate track deviation in internal deformation due to the operation of a loading mechanism, and can operate stably even when noise and dust are added. SOLUTION: A floppy disk device has a means for suppressing the propagation of distortion by retaining a loading mechanism consisting of a cassette retention body 17 and a slide member 16 in a bottom case 2 with a screw hole 2a for mounting an outside system onto a bottom surface and both side surfaces, by mounting a head-positioning mechanism 1a and a disk-driving mechanism 1b to a device substrate 1, and by forming a separate piece and a means for preventing noise and dust from entering by a shielding effect due to the bottom case 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floppy disk drive used as an external storage device for a personal computer or the like.

[0002]

2. Description of the Related Art FIG. 2 is an exploded perspective view showing the structure of a conventional floppy disk device (FDD device). This device has a head positioning mechanism including a stepping motor 31, a lead screw 33, a head carriage 35, and a head holder 34 on a device base 30, a disk driving mechanism including a center shaft 32a and a rotor 32,
A loading mechanism including a cassette holder 37 and a slide member 36 is attached. The magnetic recording medium accommodated in the cartridge is held by a magnetic head attached to a head holder and a head carriage, and the magnetic head is positioned on a specified track on the magnetic recording medium by a head positioning mechanism.

With this configuration, when a cartridge is mounted, the magnetic recording medium is rotated by the disk drive mechanism, and data is read and written by the magnetic head.
The ejection of the cartridge is performed by moving the slide member 36 by pressing the eject button 36a and moving the cassette holding body 37 holding the cartridge upward. The side and bottom (not shown) of the device base 30 have screw holes 30 a for mounting an external system, and engage with the guide groove 30 b engaging with the slide member 36 and the convex portion 38 of the cassette holder 37. Guide groove 30c
Are provided.

[0004]

In the above-mentioned structure of the prior art, if the flatness of the FDD mounting bracket and the precision of the mounting hole pitch are poor, the device base is distorted. Therefore, when the FDD is mounted on the FDD mounting bracket of a computer or the like, there is a problem that the device base is distorted, the head positioning mechanism does not operate normally, and the magnetic head causes a track shift.

[0005] Further, since the loading mechanism is attached to the device base, internal distortion is generated when the loading mechanism operates. Therefore, there is a problem in that distortion is applied to the device substrate due to internal distortion when the cartridge is inserted and ejected, the head positioning mechanism does not operate normally, and the magnetic head causes a track deviation.

Further, since a mechanical component mounting portion is provided on the device base, a large number of holes are formed. Therefore, there is a problem that the noise shield effect and the dustproof effect are reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a floppy disk drive in which no distortion is transmitted to the device base even if the surface accuracy and pitch dimension of an FDD mounting bracket for a computer or the like are poor, and the magnetic head does not cause track deviation. It is in.

Another object of the present invention is to provide a floppy disk drive which does not cause a track shift even when an internal distortion is caused by the operation of the loading mechanism.

Another object of the present invention is to provide a floppy disk drive capable of performing a stable operation even under the influence of noise and dust.

[0010]

To achieve the above object, a floppy disk drive of the present invention is housed in a cartridge in a floppy disk drive which engages with a magnetic recording medium as an external storage device such as a personal computer. A disk drive mechanism that engages with and rotates the magnetic recording medium, a pair of magnetic heads that contact the magnetic recording medium to read and write data, and a lead screw, a head holder, and a head carriage that hold the magnetic head. A head positioning mechanism that moves in the radial direction of the magnetic recording medium, a device base that holds the disk drive mechanism and the head positioning mechanism, a cassette holder that holds the cartridge, and moves from the insertion / ejection position to the recording / reproduction position,
A slide member that moves in the cartridge insertion / ejection direction and moves the cassette holder from the insertion / ejection position to the recording / reproducing position, a top case mounted on the head positioning mechanism, the device base, the cassette holder, and the slide member; And a bottom case, wherein the bottom case engages with the cassette holder and the slide member and is attached to an external system.

[0011] Further, the bottom case has a cassette holder guide groove which engages with a protrusion provided on the side surface of the cassette holder, and a slide member guide groove which engages with the protrusion provided on the side surface of the slide member. Preferably, the cassette member is moved substantially at right angles to the insertion / ejection direction, and the slide member is moved in the medium insertion / ejection direction.

Further, when the cartridge is inserted into the cassette holder, the cassette holder and the slide member operate, and
Preferably, the cartridge is mounted at the recording / reproducing position.

Still further, it is preferable that the slide member has a projecting eject button, the cassette holder has a groove for engaging and sliding with the eject button, and the cartridge is ejected by pushing the eject button. .

Preferably, the bottom case absorbs the distortion of the floppy disk and suppresses the distortion of the device base.

Furthermore, it is preferable that the bottom case makes it difficult for the internal distortion to be transmitted to the apparatus substrate when the loading mechanism including the cassette holder and the slide member is operated.

Further, it is preferable that the head positioning mechanism and the disk drive mechanism are attached to members other than the cassette holding member and the slide member, thereby suppressing the propagation of distortion.

It is also preferable that the bottom case is made less susceptible to noise, dust and the like due to the shielding effect by reducing the number of mounting holes.

According to the present invention, in particular, a loading mechanism comprising a cassette holder and a slide member is held in a bottom case having screw holes for mounting an external system on the bottom surface and both side surfaces, and a head positioning mechanism and a disk drive mechanism are provided. Is mounted on the device base and formed as a separate piece to suppress the propagation of distortion, and a means for preventing noise and dust from entering due to the bushing effect of the bottom case.

With such a configuration, a system mounting screw hole is provided in the bottom case.
Even if the FDD has poor surface accuracy and pitch accuracy and distortion is applied to the FDD, the distortion is absorbed by the bottom case, so that distortion of the device base can be suppressed.

Further, since the loading mechanism is disposed in the bottom case, it is difficult to transmit internal distortion during operation of the loading mechanism to the apparatus base.

Further, the shielding effect of the bottom case makes it hard to be affected by noise, dust and the like.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of a floppy disk drive according to an embodiment of the present invention. This device is a device base 1
The head positioning mechanism 1a and the disk drive mechanism 1
and b. The head positioning mechanism 1a includes a stepping motor 11, a lead screw 13, a head carriage 15, and a head holder 14. The disk drive mechanism 1b includes a center shaft 12a and a rotor 12. The slide member 16, the cassette holder 17, and the bottom case 2 are arranged so as to hold the apparatus base 1, the head positioning mechanism 1a, and the disk drive mechanism 1b therebetween. The slide member 16 and the cassette holder 17 are connected to the eject button 1 provided on the slide member 16.
The cartridge is discharged by the groove 6a and the groove 17a provided in the cassette holder 17. Bottom case 2
Are screw holes 2a for mounting the system on the bottom and both sides.
A slide member guide groove 2b which engages with the protrusion 16b of the slide member 16, and a protrusion 17c of the cassette holder 17;
And a cassette holder guide groove 2c that engages with Further, a top case 19 is arranged to face the bottom case 2. The device base 1 and the bottom case 2 are fastened with screws 2d. The head positioning mechanism 1a and the disk drive mechanism 1b are loading mechanisms.

Next, the operation of the embodiment of the present invention will be described. First, when the cartridge is inserted into the cassette holder 17, the loading mechanism operates, and the cartridge is mounted at the recording / reproducing position. The magnetic recording medium accommodated in the cartridge is supported from above and below by a magnetic head attached to the lead screw 13 and the head holder 14, and is positioned on a specified track on the magnetic recording medium by a head positioning mechanism. When the cartridge is mounted, the magnetic recording medium is rotated by the disk drive mechanism 1b, and data is read and written by the magnetic head. The ejection of the cartridge is performed by moving the slide member 16 by pressing the eject button 16a and moving the cassette holder 17 upward.

With the above-described configuration, the F of the computer or the like
Even if the DD mounting bracket has poor surface accuracy and pitch accuracy, and the FDD is distorted during mounting, the distortion can be absorbed by the bottom case 2 and the distortion of the device base 1 can be suppressed.

Further, since the loading mechanism is arranged in the bottom case 2, it is difficult to transmit the internal distortion during the operation of the loading mechanism to the apparatus substrate 1.

Further, due to the shielding effect of the bottom case 2, it is hardly affected by noise, dust and the like.

[0028]

As described above, in the floppy disk drive of the present invention, the device base for holding the head positioning mechanism and the disk drive mechanism, and the bottom case having the loading mechanism and the mounting screw holes have a separate piece structure. I do. Therefore, there is an effect that the distortion due to the attachment is not transmitted to the device base, and the track is hardly shifted.

Further, since the internal distortion caused by the operation of the loading mechanism is not transmitted to the device base, there is an effect that the track is hardly shifted.

Further, due to the shielding effect of the bottom case having the loading mechanism and the mounting screw holes,
It has the effect of improving the noise shielding effect and dustproof effect.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device base 1a Head positioning mechanism 1b Disk drive mechanism 2 Bottom case 2a Mounting screw hole 2b Slide member guide groove 2c Cassette holder guide groove 2d Screw 11 Stepping motor 12 Rotor 12a Center shaft 13 Lead screw 14 Head holder 15 Head carriage 16 Slide member 16a Eject button 16b Convex portion 17 Cassette holder 17a Groove 17c Convex portion 19 Top cover 30 Device base 30a Mounting screw hole 30b Slide member guide groove 30c Cassette retainer guide groove 32 Rotor 32a Center shaft 33 Lead screw 34 Head holder 35 Head carriage 36 Slide member 36a Eject button 37 Cassette holder 38 Convex part 39 Top cover

Claims (8)

[Claims] 1. A floppy disk drive which engages with a magnetic recording medium as an external storage device such as a personal computer, a disk drive mechanism which engages with and rotates a magnetic recording medium contained in a cartridge, and said magnetic recording medium. A head positioning mechanism having a pair of magnetic heads for reading and writing data by contacting the magnetic head, a lead screw for holding the magnetic head, a head holder, and a head carriage, and moving in a radial direction of the magnetic recording medium; An apparatus base for holding a drive mechanism and the head positioning mechanism; a cassette holder for holding the cartridge and moving from an insertion / ejection position to a recording / reproducing position; and a cassette holder for moving in the cartridge insertion / ejection direction. Is moved from the insertion / ejection position to the recording / reproducing position. And a top case and a bottom case mounted so as to sandwich the head positioning mechanism, the device base, the cassette holding body, and the slide member, wherein the bottom case is provided with the cassette holding body and the slide member. A floppy disk drive, wherein the floppy disk drive is engaged with an external system. 2. A cassette holder guide groove in which the bottom case engages with a protrusion provided on a side surface of the cassette holder, and a slide member which engages with a protrusion provided on a side surface of the slide member. The floppy disk drive according to claim 1, further comprising a guide groove, wherein the slide member is moved in the insertion / ejection direction substantially at right angles to the insertion / ejection direction. 3. The apparatus according to claim 1, wherein when the cartridge is inserted into the cassette holder, the cassette holder and the slide member operate to mount the cartridge at a recording / reproducing position. The floppy disk drive as described. 4. The apparatus according to claim 1, wherein the slide member has a projecting eject button, the cassette holder has a groove for engaging with the eject button, and the cartridge is ejected by pushing the eject button. 4. The floppy disk drive according to claim 1, wherein: 5. The floppy disk device according to claim 1, wherein said bottom case absorbs distortion of said floppy disk and suppresses distortion of said device base. 6. The apparatus according to claim 1, wherein said bottom case makes it difficult to transmit distortion during operation of a loading mechanism including said cassette holding member and said slide to said apparatus base. Floppy disk device. 7. The apparatus according to claim 6, wherein said head positioning mechanism and said disk drive mechanism are attached to a member other than said cassette holding member and said slide member, thereby suppressing propagation of said distortion. The floppy disk device according to item 1. 8. The floppy disk drive according to claim 1, wherein the bottom case reduces the influence of noise, dust and the like by a shielding effect by reducing the number of mounting holes. .