JPH0415544B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in magnetic disk devices.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic disk device in which a holding member such as a magnetic head or pad can be moved to a recording/reproducing position with respect to a magnetic disk and retreated from the recording/reproducing position with a simple configuration.

A feature of the present invention is that the holding members such as pads and magnetic heads are configured to move relative to the magnetic disk and retreat from the magnetic disk in accordance with the vertical movement of the cartridge holder.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a plan view of a magnetic disk device according to the present invention.
is the front wall, and 2 is the machine frame. The machine frame 2 is formed integrally with the front wall 1 and is composed of bottom plates 3 and 4, a top plate 5, and side plates 6 and 7.

A cartridge holder 8 is supported on this machine frame 2, as shown in FIG. This cartridge holder 8 has a placing section 10 on which a cartridge 9 is placed. A cartridge insertion opening 11 is formed in the front wall 1. The cartridge 9 is inserted into and supported by the cartridge holder 8 through the cartridge insertion opening 11.

The cartridge holder 8 has support shafts 12, 13, 1
It has 4. These support shafts 12, 13, 14 are
It is fixed to the cartridge holder 8. Support shaft 1
2 is rotatably provided with an engagement roller 15 and a sliding rotating roller 16 at each end thereof. Similarly, the support shafts 13 and 14 are also provided with an engagement roller 15 and a sliding rotating roller 16, respectively. The side plates 6 and 7 are provided with guide walls 17, and the four sliding rotary rollers 16 have a structure in which they slide on guide surfaces each having a standby support surface 17a and a set position surface 17b formed on the guide wall 17. Therefore, the cartridge holder 8 is always regulated in a horizontal state. And cartridge holder 8
is configured to reciprocate between a standby position where a disk cartridge is inserted and a set position where recording and playback is performed on the disk.In the standby position, the sliding rotating roller 16 touches the standby support surface 17a, and in the set position, Each is supported by the position surface 17b.

The cartridge holder 8 has pins 18 and 19.
A spring 20, which is stretched between the cartridges, is biased in the cartridge ejection direction and in the direction toward the bottom plates 3 and 4, that is, downwardly.

A reciprocating plate 21 is provided on the machine frame 2 so as to be slidable with respect to the machine frame 2. The reciprocating plate is provided with a pin 22 and a guide hole 23, and the bottom plate 3,
A guide pin 24 embedded in the cartridge 4 is inserted into the guide hole 23, so that the reciprocating plate 21 is guided in the cartridge insertion/ejection direction, that is, horizontally.

A cartridge ejection button 25 is further attached to the reciprocating plate 21, and a torsion coil spring 26 is attached to the pin 22, each end of which is in contact with a guide pin 24, and the reciprocating plate 21 is attached to the torsion coil spring 26. 26 in the cartridge ejection direction. The reciprocating plate 21 has a side wall 27 that stands vertically at a position corresponding to the four engagement rollers 15, and the tip of this side wall 27 is shown enlarged in FIGS. 6 and 7. It has an inclined surface 27a that engages with the engagement roller 15.

The upper plate 5 is provided with a cartridge reset mechanism 28. This cartridge resetting mechanism 28
is generally composed of a leaf spring 29, a support lever 30, and a hub holding member 31. The leaf spring 29 is
It is fixed to the upper plate 5 with screws, and this leaf spring 2
A support lever 30 is fixed to 9. The hub presser member 31 is supported by the support lever 30 by a shaft 32, and the support lever and the hub presser member 31
is rotatable about the shaft 32. An adjustment screw 34 is attached to the support lever 30 on the side closer to the leaf spring 29, and the tip of this adjustment screw touches the top surface of the cartridge holder 8 when the cartridge holder 8 is in the standby position as shown in FIG. 3, and are spaced apart when in the set position as shown in FIG. When the cartridge holder 8 is in the set position, the hub holding member 31 presses the disc hub 35 of the cartridge 9 as shown in FIG.
When the cartridge 9 is in the set position, the disk hub 35 is held between a spindle hub 37 forming a part of the spindle 36 and the hub holding member 31.
The disk 38 is constructed integrally with the disk hub 35 and is rotationally driven by a spindle 36.

A head support block drive mechanism 39 is provided at a position away from the front wall 1. This head support block drive mechanism is composed of a stepping motor 40, a head support block 41, a guide member 42, and a pad setting mechanism 43. The head support block 41 is reciprocated between the inner circumferential side of the disk and the outer circumferential side of the disk.
A guide member 42 for guiding 1 is arranged.
The guide member 42 includes a guide rod 42A and a rotating plate 42B.
It is composed of. A guide rod 42A is disposed extending in the radial direction of the disk, and the head support block 41 is supported on this guide rod. The rotary plate 42B is integrally formed with the output shaft 40a of the stepping motor 40, and the head support block 41 is formed with a guide groove 44 that extends long in the reciprocating direction of the head support block.
As shown in FIG. 5, a portion of the rotating plate 42B is configured to fit into the guide groove 44.

The output shaft 40a of the stepping motor 40 includes
A motor pulley 45 is attached, and a steel belt 46 is wound and fixed around the motor pulley, and the end thereof is fixed to the head support block 41 by screws. The head support block 41 is
It is driven back and forth by a stepping motor 40, and its position is detected by a detection sensor 47.

The head support block 41 is provided with a magnetic head support section 48, and a magnetic head 49 is attached to the magnetic head support section. A pad setting mechanism 43 serving as a clamping and setting member is provided on the upper surface of the head support block 41.

The pad set mechanism 43 is roughly composed of a leaf spring 50 and a pad support plate 51, and the pad support plate 51 has a position facing the magnetic head 49.
Pad 52 is fixed. The cartridge holder 8 is formed with an extension plate 53 that extends toward the magnetic head drive mechanism, and includes a pad support plate 51.
An engagement piece 54 facing onto the extension plate 53 is formed on the extension plate 53 . The engagement piece 54 is formed with an abutting end 55 that engages with the extension plate 53 . This engagement piece 54
When the cartridge holder 8 is in the raised standby position, it comes into contact with the extension plate 53 and is forcibly retracted, and when the cartridge holder 8 is in the lowered set position, the magnetic head 49 is moved on the way down. Since the pad 52 hits the upper magnetic disk, the engagement piece 54 is separated onto the extension plate 53. The engaging piece 54 and the adjustment screw 34 have the function of being pushed up by the cartridge holder 8 and retracting the hub presser member 31 and pad from the set position, respectively, when the cartridge holder 8 moves from the set position to the standby position. are doing. Note that 56 is a cartridge insertion positioning pin.

Next, the effect will be explained.

In Fig. 2, the cartridge 9 is indicated by arrow A in the figure.
When the cartridge holder 8 is pushed in the direction of the arrow B, the cartridge holder 8 is guided by the guide surface of the guide wall 17 and first pushed in the direction A, and then moved downward in the direction of arrow B by the biasing force of the spring 20, from the standby position to the set position. The direction will be displaced.

When the cartridge holder 8 descends, the support lever 30 and pad support plate 51, which had been forcibly retracted upward by the cartridge holder 8, are also displaced downward by the urging force of the leaf springs 29, 50.
The state shown in Figure 3 will be reached. FIG. 3 shows the recording and reproducing state in which the cartridge holder 8 is at the set position.

Here, when the stepping motor 40 is driven, the motor pulley 45 is rotationally driven, and the head support block 41 is guided from the outer circumferential side of the disk toward the inner circumferential side of the disk.

At this time, since the rotary plate 42B rotates in the same direction as the moving direction of the support block 41, the coefficient of friction between the guide groove 44 formed in the support block and the rotary plate 42B is The coefficient of friction is smaller than that when the support block 41 is fixed, so that the support block 41 is smoothly guided toward the inner circumferential side of the disk.

When the exchange of information between the magnetic head 49 and the magnetic disk 38 is completed, the torsion coil spring 26
When the cartridge ejection button 25 is pressed against the urging force of the reciprocating plate 21, the reciprocating plate 21 moves in the direction of arrow B in FIG.

At that time, the engagement roller 15 is
4, the reciprocating plate 21 moves upward while rotating in the same direction as the moving direction, and the cartridge holder 8
is vertically raised by the guide surface of the guide wall 17, and then moves in the reverse A direction. That is, it will move from the set position to the standby position, but the sliding rotary roller 16 will rotate in the direction in which it is easy to rotate, regardless of the direction in which the reciprocating plate 21 moves. , when ejecting the cartridge 9, lightly operate the cartridge ejection button 25 to eject the cartridge holder 8.
can be moved from the set position to the standby position. Then, while the cartridge holder 8 is rising from the set position to the standby position, the upper surface of the cartridge holder comes into contact with the adjustment pin 34, and the extension plate 53 comes into contact with the contact end 55, and the leaf spring 29 , 50 are displaced, and the hub holding member 31 and pad 52 are forcibly retracted upward from the setting area.

When the cartridge ejection button 25 is released, the button 25 is moved to the first position by the biasing force of the torsion coil spring 26.
The state returns to the state shown in the figure and the ejection operation is completed.

Although the embodiment has been described above, the present invention is not limited to this, and the pad moves relative to the magnetic head to sandwich the disk, but it can also be applied to a double-sided recording device that has a magnetic head instead of a pad. Applicable.

According to the present invention, by engaging the clamping set member with the cartridge holder, the movement of the clamping member follows the movement of the cartridge holder, so that the recording/reproducing position of the clamping member on the magnetic disk can be adjusted Evacuation and approach can be done with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a partially sectional plan view of the device of the present invention, and FIG.
The figures are a side view of Fig. 1, Fig. 3 is a side view when the cartridge is in the set state, Fig. 4 is a side view showing the cartridge in the set state, and Fig. 5 shows the head support block drive mechanism in the first position. FIG. 6 is a partially enlarged side view of the cartridge holder when it is in the set position, and FIG. 7 is a plan view of FIG. 6. DESCRIPTION OF SYMBOLS 1...Front wall, 2...Machine frame, 8...Cartridge holder, 21...Reciprocating plate, 39...Head support block drive mechanism, 41...Head support block, 49...Magnetic head, 52... Patsudo.

Claims (1)

[Claims] 1 ``A magnetic head, a cartridge holder that holds a cartridge containing a magnetic disk, and a holding member such as a magnetic head or a pad can be moved between a recording/reproducing position for the magnetic disk and an insertion/ejection position for the cartridge. A clamping set member supported by the cartridge holder and an engaging portion between the clamping and setting member provided on the cartridge holder, and a magnetic head inserting the cartridge into the cartridge holder from a set position where recording and reproduction are possible on the magnetic disk. and a guide member for vertically guiding the cartridge holder between the set position and the standby position, and the cartridge holder is moved from the set position to the standby position. A magnetic disk device characterized in that the movement of the holding member follows the movement of the cartridge holder by engaging the holding member with the engaging portion of the cartridge holder during the process. ”