JPH0442480A - Magnetic disk driving device - Google Patents

Abstract

PURPOSE:To adjust the opening quantity of a turning member by required quantity by providing a connecting piece at the side by holding a magnetic head, providing the turning member which performs an approaching/separating operation for the magnetic head, and mounting a movable member unified with the connecting piece movably freely along the longitudinal direction of the turning member. CONSTITUTION:A hold case 14 which holds an upper side magnetic head 12 at a free terminal part and is turned freely, and a carriage 15 which holds a lower side magnetic head 13 and also, turns and holds the hold case 14 are provided, and the hold case 14 is always pressed elastically in an opening direction by a load spring 22. The movable member 24 is mounted on a plane at the opening direction side of the hold case 14, and the opening quantity of the hold case 14 can be increased by moving the movable member 24 to the base terminal side of the hold case 14 along an elongated hole 27 since the abutting positions of load arms 25, 26 with ribs 28, 29 are also moved to the base terminal side. In such a way, it is possible to adjust the opening quantity of the hold case 14 by the required quantity at the final stage of assembling.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is used with a disk cartridge containing a magnetic disk as an information recording medium mounted therein, and is used to raise and lower the movement of a cartridge holder holding this disk cartridge. This relates to a magnetic disk drive device that follows the opening/closing operation of a rotating member that holds a magnetic head, and in particular, the opening amount (rotational stroke) of the rotating member. Regarding the 11m mechanism.

[Prior Art] FIG. 7 is a partial plan view of a conventional magnetic disk drive of this type.

In the figure, a rotating member 3 disposed at a position facing the opening 2 of the cartridge holder 1 is also called a hold case, and is rotatably supported by a carriage 4 in order to advance and retreat into the opening 2. In other words, this rotating member 3
performs a closing operation to approach a magnetic disk (not shown) that is exposed in the opening 2, and an opening operation to move away from the magnetic disk, and with this closing and opening operation, the free end of the rotating member 3 A magnetic head (not shown) held by the magnetic head moves toward and away from the magnetic disk. Nine, this rotating member 3 is
By moving the carriage 4 in the vertical direction shown in the figure,
It is adapted to be transported along the radial direction of the magnetic disk. The load spring 5 always elastically biases the rotating member 3 in the closing direction, and this biasing force causes a locking piece 6, also called a load arm, protruding from the side of the rotating member 3. , since it comes into contact with a contact portion 7 erected on the edge of the opening 2 of the cartridge holder 1, the opening/closing operation of the rotating member 3 is caused by the raising and lowering of the cartridge holder 1 via this locking piece 6. Follow the action.

That is, when a disc cartridge is inserted and held in the cartridge holder 1 and the cartridge holder 1 is lowered by a known cam mechanism, the rotary member 3 moves in the closing direction following this lowering movement and is loaded onto the turntable. The magnetic head can be landed on the magnetic disk.

Further, when the cartridge holder 1 in the loading position rises, the rotating member 3 moves in the opening direction following this rising movement, so that the disk cartridge can be ejected from the apparatus without being caught by the magnetic head. .

In addition, in the above conventional example, in order to cause the magnetic head to land softly on the magnetic disk, the locking piece 6 of the rotating member 3 is
A damper mechanism is provided to make the lowering speed of the cartridge holder slower than that of the cartridge holder 1.

[Problem M to be solved by the invention] Incidentally, this type of magnetic disk moving device has recently become thinner and thinner, and as a result, the opening amount (rotational stroke) of the rotating member that holds the magnetic head has become smaller and thinner. ) must be set as small as possible, but in this case, if the opening amount of the rotating member becomes smaller than the designed dimension due to assembly errors, the disk cartridge may get caught in the magnetic head during insertion or ejection. There is a risk of damaging this. Therefore, until now, the height position of the contact part 7 that pushes up the rotating member 3 in the opening direction relative to the cartridge holder l can be changed using a screw or the like, and the opening amount of the rotating member 3 can be changed at the final stage of assembly. However, this adjustment mechanism can only adjust within the clearance defined between the locking piece 6 and the contact part 7 when loading is completed, and this clearance may be lost. Since it becomes impossible to bring the magnetic head into contact with the magnetic disk, there is an inconvenience that only a small amount of adjustment can be performed after all.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a magnetic disk drive device in which the opening amount of a rotary member that holds a magnetic head can be adjusted by a necessary amount.

[Means for Solving the Problems] The objects of the present invention described above are to provide a cartridge holder that holds a disk cartridge containing a magnetic disk when it is inserted into an apparatus, and a cartridge holder that holds a disk cartridge that houses a magnetic disk when it is inserted into an apparatus, and a cartridge holder that moves the cartridge holder up and down to A lifting means for loading and unloading a disk onto and from a turntable, a rotational driving means for rotationally driving the turntable, a magnetic head for writing/reading signals to/from a magnetic disk, and a magnetic head for holding the magnetic head. a rotating member provided with a locking piece on the side, and rotatably supported to perform a closing operation toward the magnetic disk in the cartridge holder and an opening operation away from the magnetic disk; and a transfer means for transferring along the radial direction of the cartridge holder, and the rotating member is biased in the closing direction to bring the locking piece into contact with a part of the cartridge holder, thereby causing the cartridge holder to move up and down. In the magnetic disk moving device that follows the opening and closing operations of the rotating member, this is achieved by attaching a movable member integral with the locking member so as to be movable along the longitudinal direction of the rotating member.

[Operation] According to the above means, when the mounting position of the movable member is changed along the longitudinal direction of the rotary member, the contact position of the locking piece with respect to the cartridge holder changes accordingly, for example, the base end of the rotary member When the locking piece is moved to the side, the opening amount of the rotary member becomes larger, and conversely, when the locking piece is moved toward the free end side of the rotating member, the opening amount becomes smaller.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 6.

FIG. 1 is a plan view showing the internal structure of a magnetic disk drive device according to this embodiment, and FIG. 2 is a side view of the main parts thereof. The magnetic disk drive device shown in these figures includes a chassis 10 made of aluminum alloy, and is supported so as to be movable up and down with respect to the chassis 10, and a disk cartridge (
A cartridge holder (hereinafter referred to as holder) 11 that holds a disk cartridge (not shown) when it is inserted into the device, and a turntable (not shown) that mounts a magnetic disk housed in a disk cartridge case. (not shown), a spindle motor (not shown) that is disposed on the bottom side of the chassis 10 and drives the turntable to rotate, and a read/write system for writing/reading signals on both sides of the magnetic disk loaded on the turntable. an upper magnetic head 12 and a lower magnetic head 13, a hold case 14 that holds the upper magnetic head 12 at its free end and is rotatable in the directions of arrows A and B in FIG. 2, and a lower magnetic head. 13 and rotatably supports the hold case 14.
5 and this carriage 15 in the radial direction of the magnetic disk,
In other words, it is mainly composed of a stepping motor 16 that moves in the vertical direction in FIG.

The holder 11 is moved up and down by a known cam mechanism that is linked to the movement of a slide plate 17 that is movable in the vertical direction in FIG. That is, when the disc cartridge is inserted to the innermost part of the holder 11, the eject lever 18 is locked by the lock lever 19 with the shutter of the disc cartridge opened, and at the same time, the slide plate 17 is unlocked, as shown in the figure. The slide plate 17 moves toward the cartridge insertion opening (lower side in Figure 1) due to the elastic force of the spring, and along with this movement, the cam mechanism closes the reholder 1.
1 is lowered to the load position. Also.

When the holder 11 is in the loading position, when the eject button 20 connected to the slide plate 17 is pushed in, the slide plate 17 moves to the back side (upper @ in Figure 1) and as the eject button 20 is pushed in,
As the holder 11 is raised by the cam mechanism, the lock lever 19 and the eject lever 18 are rotated, and the disk cartridge moves toward the cartridge insertion opening with the shutter closed, and is ejected from the cartridge insertion opening to the outside of the apparatus.

An opening 21 is cut out on the back side of the holder 11 relative to the turntable, and the hold case 14 disposed at a position facing this opening 21 is always moved in the closed direction (direction of arrow A) by a load spring 22. The holding case 14 is elastically biased, and a movable member 24 as shown in FIG. 3 is attached to the opening direction (direction of arrow B) side of the hold case 14 using a mounting screw 23. This movable member 24 is 1
A pair of load arms 25 and 26 are protruded from both sides, and an elongated hole 2 extending in the longitudinal direction of the hold case 14 is provided at the center.
7, as shown in Figure 4, the elongated hole 2
By screwing the mounting screw 23 inserted into the hole 7 into the screw hole 30 of the hold case 14, the hold case 14
and the movable member 24 are integrated. Therefore, the mounting position of the movable member 24 with respect to the hold case 14 is as follows.
It is movable along the long hole 27.

On the other hand, a pair of ribs 28 and 29 are provided at corresponding positions on the edge of the opening 21 of the holder 11 and extend in the vertical direction in FIG. By bringing the integral load arms 25 and 26 into contact with these ribs 28 and 29, respectively, the holder 1
The hold case 14 opens and closes in response to the lifting and lowering operations of the holding case 1.

That is, when the holder 11 is at the standby value, the hold case 14 is in the most open state and does not prevent the insertion of the disc cartridge, but as the holder 11 holding the disc cartridge descends, the ribs 28, 29 , the hold case 14 moves in the closing direction (in the direction of arrow A) due to the biasing force of the load spring 22.
The upper magnetic head 12 lands on the magnetic disk loaded on the turntable. Note that the lower magnetic head 13 contacts the opposite surface of the magnetic disk in the loaded state, so when the magnetic disk is rotationally driven via the turntable, the upper and lower magnetic heads 12, 13
This makes it possible to write/read signals on both sides of a magnetic disk. Further, when unloading a magnetic disk from the turntable, the ribs 28 and 29 move toward the load arm 25 as the holder 11 rises.
26, the hold case 14 moves in the opening direction (arrow B direction), and the holder 11 moves to the ejection position i.
f (When the hold case 14 is raised to the standby position, the hold case 14 becomes the most open state, and the disc cartridge is ejected.

In this magnetic disk drive device, by changing the mounting position of the movable member 24 along the elongated hole 27, variations in the opening amount (rotation stroke) of the hold case 14 caused by assembly errors can be adjusted. It looks like this. In other words, when the movable member 24 is moved toward the proximal end of the hold case 14 along the elongated hole 27, the contact positions of the load arms 25 and 26 against the ribs 28 and 29 also move toward the proximal end. The mouth opening becomes larger,
Conversely, when the movable member 24 is moved toward the free end of the hold case 14, the abutting position also moves toward the free end, thereby reducing the opening amount of the hold case 14. Note that this adjustment is performed by adjusting the load arms 25 and 26 relative to the holder 11.
Since the height position of the load arm 25, 26 and ribs 28, 2 are not changed when loading is completed,
The clearances respectively defined between 9 and 9 are not affected by this adjustment, so a weight can be set as required.

In this way, in the above embodiment, by changing the mounting position of the movable member 24 along the elongated hole 27 at the final stage of one assembly, the opening amount of the hold case 14 can be adjusted by the necessary amount. Large adjustments can be made to the opening amount, which was difficult with conventional products, and the adjustment process itself is simplified.

Further, in the above embodiment, load arms 25° 26 are provided at corresponding positions on both sides of the hold case 14, and these load arms 25° 26 are brought into contact with ribs 28 and 29, respectively. Because of this structure, the holding case 14 does not suffer from any separation due to its own weight, and therefore, the opening amount can be set to the minimum necessary, and the device can be made thinner.

In the above embodiment, the movable member attached to the hold case is provided with a long hole, but a similar long hole may be provided in the hold case so that the mounting position of the movable member can be changed.

5 and 6 show other embodiments of the magnetic disk drive device according to the present invention, FIGS. 5(a) and 6(b) are plan views and side views of the main parts, and FIG. 6 is a movable member. FIG. 2 is a side view and a front view.

In this other embodiment, the movable member 31 is formed with a recess 33 having engagement grooves 32 and 32 on both sides in place of the elongated holes of the above embodiment. 3
The protrusions 34 and 34 that fit into the hold case 14
It protrudes from the bottom of the center on both sides. Therefore, the movable member 31 is movable along the protrusion 34, that is, along the longitudinal direction of the hold case 14, and the elastic force of the movable member 31 allows the movable member 31 to be held at any position in the longitudinal direction. It is in a fixed state with respect to the case 14.

On the other hand, if you want to move the movable member 31.

What is necessary is to move the movable member 31 along the protrusion portion 34 against the frictional holding force generated by the above-mentioned elastic force, and there are other configurations not particularly described.

The configuration is similar to that of the above embodiment.

In each of the above embodiments, the load arms are provided on both sides of the hold case.

It goes without saying that the present invention is also applicable to a magnetic disk drive device in which a load arm is provided only on one side of the hold case.

[Effects of the Invention] As explained above, according to the present invention, by changing the mounting position of the movable member along the longitudinal direction of the rotating member, the opening amount (rotation stroke) of the rotating member can be changed. The required amount can be easily adjusted, and the opening amount of the rotating member can therefore be set with high precision, which greatly contributes to making the magnetic disk drive device thinner.

[Brief explanation of drawings]

1 to 6 relate to embodiments of the present invention, in which FIG. 1 is a plan view showing the internal structure of the magnetic disk stirring device, FIG. 2 is a side view of the main parts thereof, and FIG. 3 is a movable member. FIG. 4 is a plan view, FIG. 4 is a cross-sectional view showing the mounting structure of the movable member to the hold case, FIGS. 5 and 6 show other embodiments of the magnetic disk moving device according to the present invention, and FIG. a) and (b) are a plan view and a side view of the main parts thereof, a side view and a front view of the sixth aYq moving member, and FIG. 7 is a plan view showing the vicinity of the hold case of the magnetic disk drive device according to the conventional example. . 11... Cartridge holder, 12...
・Upper magnetic head, 14...Hold case (
rotating member). 15... Carriage, 21... Opening,
22...Load spring, 23...
Mounting screw, 24, 31...Movable member, 25.2
6...Load arm (locking piece), 27...
...Elongated hole, 28.29...Rib, 32...
...Engagement groove part, 34... Projection part. Figure 2 Figure 4 Figure 5 Cσ diagram Figure

Claims (1)

[Claims] a cartridge holder that holds a disk cartridge containing a magnetic disk when it is inserted into the apparatus; a lifting means that lifts and lowers the cartridge holder to load and unload the magnetic disk onto and from the turntable; a rotational drive means for rotationally driving a table; a magnetic head for writing/reading signals on/from a magnetic disk; and a magnetic disk in the cartridge holder, the magnetic head being held by a locking piece on the side; a rotating member rotatably supported to perform a closing operation toward the magnetic disk and an opening operation moving away from the magnetic disk; and a transfer means for transporting the rotating member along the radial direction of the magnetic disk. In the magnetic disk drive device, the locking piece is biased in the closing direction to bring the locking piece into contact with a part of the cartridge holder, thereby causing the lifting and lowering movement of the cartridge holder to follow the opening and closing movement of the rotary member. A magnetic disk drive device characterized in that a movable member integral with a stopper is attached so as to be movable along the longitudinal direction of the rotating member.