JPS58211378A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To reduce the thickness as well as the number of component parts including a motor, etc. for a dual type magnetic disk device, by arranging recording media on both sides of a substrate. CONSTITUTION:Recording media 71a and 71b are arranged on upper and lower faces of substrate 72a, and a motor 73a is provided to a single side of the substrate 72a to drive both recording media. At the same time, recording media 72a and 72b are inserted to slits 2a and 2a' of a decorative panel 2. In such a way, the number of motors and substrates can be reduced. This can reduce the height of a magnetic disk device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk drive having a structure that includes a member for accurately mounting a plurality of magnetic recording media to predetermined positions of a drive device.

The magnetic disk device 4 is a magnetic recording and reproducing device using a disk-shaped magnetic recording medium, and is mainly used as an external storage device for computers.

This conventional magnetic disk drive has many drawbacks as follows.

That is, as shown in FIGS. 1(a) and 1(b) (perspective view), the conventional dual type magnetic disk drive 4 has a base for each medium (magnetic recording medium) 71a, 71b. 72a, 72b, motors 73a, 73b, and head carriages 74a, 74b, many structural members are required, and the height H of the apparatus is increased.

The present invention has the following configuration for the purpose of eliminating such conventional drawbacks. That is, as shown in Figure 2, the first
The base 72b in FIGS. (a) and (b) is removed, and the base 72b is removed.
Media 71a and 71 are provided on the upper and lower sides of 2a, respectively.
b was placed. This made the base smaller.

Next, remove the motor 73b in FIG.
Media 71a and 71 on the upper and lower surfaces of 3b, respectively.
Drive b. This reduced the number of motors.

A decorative panel (opening member) having two openings for inserting media is attached to the magnetic disk device in which the height H of the device is reduced by these configurations.

Hereinafter, the present invention will be explained in detail based on the embodiments shown in the drawings. Figure 3 shows an external perspective view of the device. In each of the following figures, the arrow F direction is a front view, the R direction is a rear view, the J direction is a top view, the K direction is a downward view, and the S direction is a side view. do.

First, the top view, bottom view, and front view shown in Figures 4 to 7,
A general description will be given using a side view and FIG. 22 (perspective view).

In each figure, 1 is a base on which various mechanisms of this device are mounted.

2 is a decorative panel having two media insertion ports 2a and 2a'.

110 and 111 are (Fig. 22) guide strips (left)
, (right), which guides magnetic recording media.

Reference numerals 7 and 7' designate mounting plates, which guide the media 5 in the vertical direction and are equipped with an eject mechanism and a clamp mechanism.

The guide strips 110 and 111 are attached to the mounting plate 7' and the screw 1.
13, it is fastened together to the base 1.

112 is a stepper motor mounting plate, which connects the load arm 19 via the stepper motor 53' and the plate spring 20'.
' and Tr00 (track "O0") attached detector 67'
can be installed.

This device has a mounting plate 7' and a guide strip 110 on the main body base of a drive (driving device) that uses a single media.
By attaching the stepper motor mounting plate 111 and the stepper motor mounting plate 112, the structure is such that two pieces of media can be attached, and it is possible to share the base with a normal drive, that is, one with one piece of media. Also, in most of the mechanisms, the upper structure and the upper structure are symmetrical with respect to the center of the drive, and the only difference in structure is the DD (Direct Drive) motor that rotates the media, the head section, and the upper structure. Base 1, guide strip 110
, 111, only the stepper motor mounting plate 112.

Therefore, regarding the plane-symmetrical portion, only the upper mechanism will be explained.

3 is an eject lever for ejecting the media 5, and is constantly pulled in the direction of arrow A by a spring 6.

Reference numeral 4 denotes an operation button for clamping (holding) and ejecting the media, and can be operated in both directions of arrows A and B.

The operating button 4 is connected to a button lever 8 equipped with a latch 12 that locks the movement of the button.

The clamp lever 11 is rotatably fixed to the mounting plate 7 via a pin 18, and one end of the lever 11 is connected to the button lever 8 via a link 15 via a pin 14.

The other end of the lever 11 is in contact with the other end of a load arm 19 that is movable up and down on the base 1 via a leaf spring 20. Note that the load arm 19' is attached to the stepper motor mounting plate 112 via a leaf spring 20'.

The load arm 19 rotatably holds a center cone 23 to which a bearing 25 is fixed via a spring 26 and a shaft 24.

There is a spindle 28 facing the center cone 23 for positioning and driving the media 5, and the spindle 28 is rotatable by a base ring 30 inserted into the base 1. Similarly, there is a spindle 28' facing the center cone 23', and the spindle 28' is connected to a rotor 29 of a DD motor for driving the media to form a rotor assembly. That is, the spindles 28, 28' are directly connected and fixed to the DD motor.

Furthermore, the rotor assembly and spindle 2 of this DD motor
By simply changing 8, it can easily become a normal DD motor and spindle mechanism for driving one medium.

Reference numeral 32 shown in FIG. 5 is a printed board fixed to the base 1 with screws 35 and provided with a circuit for driving the rotor assembly of the DD motor.

36 connects the head arm 48 to the head load solenoid 41
This is a head load arm for loading the head by driving the head with a sponge pad 43 for stabilizing the vibration of the media.

52 is a head carriage on which a button head is mounted, and a head arm 48 on which a gimbal head is mounted is attached with screws 49.

The head carriages 52, 52' are attached to the base 1 with a presser plate 63.
It is held slidably in both directions of arrows A and B, independently or interlockingly, by two guide bars 62 fixed by screws 64.

The carriage 52 is connected via a steel belt 55 to a pulley 54 which is fixed to the base 1 and to a head seek stepping motor 53. carriage 52
' is a carriage 5 driven by a head seek stepping motor 53' fixed to the stepper motor mounting plate 112.
2, or by being connected to the carriage 52 by a connecting plate (not shown).

In addition, at that time, the stepper motor 53' and the pulley 54'
, head seek mechanism members such as the steel belt 55' and the Tr00 position detector 67' are unnecessary, resulting in cost reduction.

65 is a detector for detecting the presence or absence of a notch cover provided on the medium to prevent rewriting.

66 is an index hole detector.

67 is a detector of Tr00.

100 is an LED (light emitting diode) or lamp for internal use, displaying the viper.

Each mechanism will be explained in detail below.

First, the media locking and ejecting mechanism will be explained using FIGS. 8 to 11.

Media insertion slot 2a provided in the center of the decorative panel 2
Through this, the media 5 is inserted into the gap provided between the mounting plate 7 and the base 1 in the direction of FIG. 4B.

As the media 5 continues to be inserted, the edge 5a of the media 5 comes into contact with the falling portion 3a of the eject lever 3, and when the media 5 is pushed further, the eject lever 3 is moved to the B position by the media 5.
move in the direction.

The eject lever 3 has a pin 10 caulked to the mounting plate 7.
Then, the eject lever 3 is guided and moved in the direction B by an elongated hole (not shown) provided in the eject lever 3.

Also, the rising portion 3e of the eject lever 3 and the mounting plate 7
The eject lever 3 is always biased in the A direction (see FIG. 4) by the eject spring 6 stretched between the eject lever 3 and the rising portion 7b. The rising portion 36 of the eject lever 3 is rotated in the Y direction (the Y direction) by the eject spring 6, which always applies a force in the A direction around the pin IO, and the force in the B direction applied to the eject lever falling portion 3a. (see Fig. 4), it comes into contact with the falling portion 7a of the mounting plate 7, and is guided.

If the media 5 is continued to be pressed further, the eject lever rising portion 3b comes into contact with the mounting plate rising portion 7a, and as it continues to move forward, it comes off from the mounting plate rising portion 7a and is further moved by the turning force applied to the eject lever rising portion 3b. Turn in the Y direction. At this time, the edge of eject lever 3 is 3g.
comes into contact with the mounting plate upright portion 7a and stops. Further, when the eject lever rises, the edge 3h of the portion 3b hits the edge 7f of the mounting plate rising portion 7a, thereby restricting movement in the A direction. This state is called a media locked state, and is the state shown by the two-dot chain line of the eject lever 3 in FIG. 8(a).

In this locked state, the rising portion 3c of the eject lever 3 is in the state shown by the two-dot chain line in FIGS. 8(a) and 8(b), and is in a state removed from under the arm 11a of the clamp lever 11. In this state, when the operation button 4 is pushed in, the clamp lever 11 can be rotated in the vertical direction.

In other words, when the media 5 is not in the locked state, that is, when the media is incompletely inserted, even if the button 4 is pressed, the eject lever rising portion 3c is under the arm 11a of the clamp lever 11, so the clamp lever 11 is moved in the vertical direction. The rotation of the eject lever is blocked because it hits the rising part 3c.
, Therefore, button 4 cannot be pushed in. This prevents damage to the media because the media 5 is not clamped when the media is incompletely inserted.

Next, the media clamping mechanism and button locking mechanism will be explained using FIGS. 9 to 13.

After the media 5 is locked as described above, when the button 4 is pushed in the B direction, the button lever 8 fixed to the button 4 is guided by pins 9 and 10 fixed to the mounting plate 7 and moves in the B direction. The latch 12 is a member that completely locks the return of the button 4 in the A direction, and is rotatably supported by a pin 13 fixed to the button lever 8. Further, the latch 12 receives force in the Y direction by a spring (not shown), and the button lever rising portion 8a
Movement in the Y direction is restricted by contacting the . Furthermore, button 4
If you keep pressing , button lever 8 moves in direction B, and latch 1
When the cam surface 12a of the latch 12 contacts the pin 9 and the button 4 is pushed further, the latch 12 resists the urging force in the Y direction applied by a spring (not shown) and the cam surface 8a contacts the pin 9. Due to the action of , it is rotated in the X direction (see FIG. 4) about the pin 13 as the center of rotation.

If the button 4 is continued to be pressed further, the pin 13 will come off the cam surface 8a and the latch 1 will be pulled under the force of a spring (not shown).
2 rotates in the Y direction, and the pin 9 is fixed in the latch groove of 12b. This state is shown by the two-dot chain line in FIG. This is called the button's locked state.

Next, go back and press button 4 with the media locked.
When pushed in the B direction, the button lever 8 fixed to the button 4 moves in the B direction. A rotatably supported roller 16 and a link 15 are connected to the button lever 3 via a pin 14. The other end of the link 15 is rotatably connected to the arm 11e of the clamp lever 11 via the pin 17.

The clamp prepper 11 connects the rising portion 7c of the mounting plate 7 and the pin 1.
8, they are rotatably connected.

As the button lever 8 moves in the B direction, the roller 16 rotates and moves on the mounting plate 7. Also, clamp lever 1
1 constitutes a link mechanism with link 15, and link 1
When one end of the link 15, which is rotatably connected to the pin 14, moves in the direction B, the clamp lever arm 11e is rotatably connected to the other end of the link 15 via the pin 17. The arm 11e is pushed up by the link 17 and rotates around the bottle 18, and the clamp lever
Arms 11a and 1lc move downward.

The clamp prepper arm 11c is in contact with an ear 19b of a load arm 19 fixed to the base 1a via a leaf spring 20. In addition, the leaf spring 20 always exerts a force that pushes the load arm 19 upward, and as a result, the clamp lever arm 11c in contact with the load arm ear 19b exerts a force that lifts the pin 18 upward around the rotation center. is working. As described above, when the button 4 is pushed in the direction B, the clamp lever arm 11c moves the load arm 19 downward against the force of the leaf spring 20 by the link mechanism. Along with that,
The center cone 23 attached to the load arm 19 guides the center hole of the media 5 while moving the spindle 28
to center the media.

The aforementioned center cone 23 is fixed to a bearing 25, and the bearing 25 is coupled to a shaft 24. These are called cone assemblies. A cone spring 26 is compressed and attached between the cone assembly and the load arm 19 so as to exert a certain constant load. Further, a retaining ring 103 is inserted into the upper part of the shaft 24 to prevent the cone assembly from coming off the load arm 19 due to the cone spring 26.

Next, when the button 4 is pressed further, the load arm 19 is lowered, and the spring pressure of the biased spring 26 is applied to the spindle 28 through the center cone 23 and the media 5.

That is, this is the media's clamped state.

This state is shown by the two-dot chain line in FIG.

At the moment of clamping, that is, when the biased force of the cone spring 26 is transmitted to the media, the reaction is also transmitted to the clamp lever arm 11c, and a large force is essential for the clamp lever arm 11c to lower. At that time, the link 15 is close to the position shown by the two-dot chain line in Figure 13, so the component force in the A direction is small, so the lead 4 is pushed in. The force may be small.

Next, unlocking the button, that is, releasing the clamp and ejecting the media will be explained using FIGS. 9 to 13. In addition, as shown in FIG. 9, together with the locking operation of the button 4, the rising portion 3d of the eject lever 3 is pushed in the X direction by the latch 12 due to the rotation of the latch 12 in the X direction. , the engagement between the eject lever rising portion 3b and the mounting plate rising portion 7a in the media lock state described above is released, and the eject lever 3 becomes movable in the direction A by the spring 6.

In other words, the media is in a media eject state.

At this time, since the clamping operation is being performed at the same time, the clamp lever arm 11a is lowered and comes into contact with the edge 3f of the eject lever rising portion 3c, thereby preventing the eject lever 3 from moving in the A direction. This is the state shown in FIG. 10 and FIG. 11, which is a side view thereof.

At the stage described above, insertion and clamping of the media has been completed. In this state, a series of reading and writing processes for the media 5 are performed.

Next, ejection of the medium 5 will be explained.

When the locked button 4 is further pressed, the button lever 8 moves in the direction B and the latch 12 also moves at the same time. As a result, the pin 9 in the latch groove 12b enters the lower side of the bent portion 12c to rotate the latch 12 in the Y direction.

Then, the button lever 8 is returned in the direction A by the force of the spring 101 provided on the arm 8b of the button lever 8 and the force of the leaf spring 20 of the load arm 19. At that time, clamp lever arm 11
The eject lever a also rises along the edge of the eject lever rising portion 3c, and is disengaged. At that time, eject lever 3
becomes free, and by the force of the spring 6, the falling part 3a of the eject lever moves in the direction A without hooking the media end surface 5a, and the media 5 is ejected.

The rotation of the clamp lever 11 is linked with the load arm 19, and just before the load arm 19 is completely raised, the eject lever rising portion 3c and the clamp lever arm 11 are connected to each other.
Since a is removed and ejected, the media 5 is ejected by the load arm 19 via the head arm 36, after the head arm 48 and the gimbal head (not shown) are raised. This prevents the media 5 from catching the gimbal head and damaging it. The mechanisms of the head load arm 36, load arm 19, head arm 48, etc. will be explained next.

Next, the head loading mechanism will be explained using FIGS. 16 to 19.

In the media insertion and lock state described above, the head load arm 36 is in contact with the load arm, and the spring 38 constantly applies downward force. Also, a head arm 4 holding a gimbal head (not shown)
8 is an arm portion 48a that receives downward force from a spring 51.
is in contact with the head load arm 36.

As shown in FIG. 16, in the media clamp state, the load arm 19 is lowered, and the head load arm 36 and head arm 48 are also lowered to predetermined positions accordingly.

The head load arm 36 is rotatably held by its rising portion 36b and a bracket 39 attached to a solenoid holding member 40 attached to the base 1 via a shaft 37.

On the other hand, a damper 44 is fixed to the vertical portion 36a of the head load arm, and one side of the damper 44 faces the movable iron core 41a of the solenoid 41. The aforementioned predetermined position is set at the position where the damper 44 and the movable iron core 41a abut. The meaning of setting a predetermined position is to prevent the gimbal head from being loaded onto the media 5, and to reduce the distance between the media 5 and the button head facing the back side of the media 5, and to prevent the head from loading when the head is loaded. This is to reduce the impact received.

Next, when a head load signal is input to the solenoid 41, the movable iron core 41a is sucked against the spring 42. Thereby, the head load arm 36 is further rotated downward by the force of the spring 38. Then,
The gimbal head is pressed against the button head via the media 5, and is in a reading and writing state. Further, when the head load arm 30 is lowered, the pressure pad 43 provided on the head load arm 36 comes into contact with the media 5 and presses the media to stabilize it. When the head load signal is released, the movable iron core 41a is returned by the force of the spring 42 and lifts the head load arm 36 via the damper 44. At this time, since the damper 44 is used, a silencing effect can be obtained. Furthermore, since the head arm 48 is lifted, the jimpal head is returned to the aforementioned predetermined position.

The damper 44 is made of non-magnetic material such as rubber and synthetic resin, and prevents the head load arm 36 from becoming magnetized.

Next, the head seek mechanism will be explained using FIG. 5 and FIGS. 20 and 21. In order to move the head carriage 52 to a predetermined position, a stepping motor 53 fixed to the pace 1 is rotated by a predetermined angle. Next, the pulley 54 fixed to the stepping motor 53 also rotates, and the pulley 54
A steel belt 55 interposed between the head carriage 52 and the head carriage 52 moves the head carriage 52 in a straight line. That is, the head carriage 52 moves in a straight line while being guided by the guide bar 62 fixed to the base 1 at a predetermined position. Steel belt 55 is in the unfolded shape shown in FIG. In the figure, the groove 55f
The width T is slightly wider than the width t.

The steel belt 55 connecting the pulley 54 and the head carriage 52 has one end 55 of the steel belt 55.
After passing part a through the groove (hole) 55f, it is fixed to the head carriage 52 with screws 57. Attach the pulley 54 to the loop of the steel belt 55 made in this way,
It is fixed with a screw 58 passed through a hole 55d in the steel belt via a washer 59.

Figure 21 does not show the installed state of the steel belt. That is,
The other end 55b of the steel belt is fixed to the head carriage 52 with a U-shaped leaf spring 56 inside and a screw 57 passed through a hole 55g in the steel belt. This temporary spring 56 is used to apply tension to the steel belt, eliminate slack in the steel belt, and ensure accurate positioning of the carriage.

FIG. 22 shows the mounting plates 7, 7', the guide strip 110,
FIG. 111 is an exploded perspective view of the stepper motor mounting plate 112 and the like.

Next, a carriage structure in which two head carriages are guided by two guide bars 62 will be explained using FIGS. 23 to 26.

FIG. 23 is a bottom view showing a state in which the head carriage 52 is slidably attached to the guide bar 62. FIG. 24 is a rear view of FIG. 23.

FIG. 25 is a bottom view showing a state in which two head carriages are guided by the guide bar 62. And the second
FIG. 6 is a rear view of FIG. 25. In the figure, the head gear ridges 52 and 52' have exactly the same shape, and are designed to use common parts. Each head carriage is structured so that it does not interfere with each other even when seeking independently.

By adopting such a structure, it is possible to extremely easily change the structure from the structure of a normal drive device using one medium to the structure of a drive device for a dual drive using two media.

Next, using FIG. 27, the two media can be installed in the same direction.

The structure of the dual drive head carriage, which explains the head arrangement, is as described above, but since the head carriages 52 and 52' are symmetrical with respect to the guide bar 62, media 5 and 5' are inserted in the same direction. In order to use the head carriage 52, 52'
The button heads 120 and 121 attached to the button head 12
The button head 121 must be fixed at a position where 0 becomes the "plane 0" head and the button head 121 becomes the "plane 1" head. That is, the core 120a and the core 121a are fixed as shown in FIG. 27.

Similarly, the gimbal heads 130 and 131 also have the gimbal head 130 as a "one-plane" head.
No. 1 is fixed at a position where it becomes a "0-plane" head.

By doing this, the upper and lower media can be inserted in the same direction, maintaining compatibility between the upper and lower media.

The present invention has the following effects. That is, (a) a common base can be used with a normal device that uses one media, and many of the other components are also common, resulting in a dual drive device that uses two media.

(b) The structure in which a spindle is provided on the rotor holder of the DD motor makes it possible to create a spindle mechanism that drives two media using one motor.

(c) The decorative panel (opening member) has an opening that allows insertion of two media, so the insertion position of the media can be determined accurately using this opening, and media can be inserted with one panel. It is possible to improve the operability of time.

As described above, the magnetic disk device of the present invention has achieved a thinner device and improved operability compared to conventional devices.

[Brief explanation of drawings]

1(a) and 1(b) are side views showing different schematic configurations of a conventional dual type magnetic disk device, and FIG. 2(a) is a side view showing a schematic structure of a magnetic disk device of the present invention. , FIG. 2(b) is a plan view of FIG. 2(a) when viewed in the direction of arrow C, FIG. 3 is a perspective view of the magnetic disk device of the present invention with a cover attached, and FIG. 4 to 7 are top, bottom, front, and side views of each member provided on the base, respectively; FIG. 8(a) is a top view showing the media insertion and locking state; ) is a side view of Fig. 8(a), Fig. 9 is a top view showing the operating state of the latch, Fig. 10 is a top view showing the button locked state, Fig. 11 is a side view of Fig. 10, Fig. 12 The figure is a top view showing the media clamp machine groove, Figure 13 is a side view of Figure 12, Figure 14 is a side view of the main part with the media clamped, and Figure 15 is a perspective view showing the latch enlarged. , Fig. 16 is a side view showing the head load mechanism, Fig. 17 is a top view of Fig. 16, Fig. 18 is a rear view showing a part of the head load movable iron core, and Fig. 19 is a rear view of Fig. 17. Figure 20 is an exploded view showing the spool belt, Figure 21 is a perspective view showing the spool belt attached, Figure 22 is an exploded perspective view of the base and spacing member, Figure 23 is a top view showing one head carriage attached to a guide bar, Figure 24 is a rear view of Figure 23, and Figure 25 is a view showing two head carriages attached to a guide bar. Figure 26 is the rear view of Figure 25. Figure 27 is a side view showing the button head and gimbal head facing each other in the dual type. 1...Pace 7, 7'...Mounting plate 19・
・Load arm 23...Center cone 28...Spindle 29...Rotor 36...Head load arm 48...Head arm 52, 52'...Head carriage 53...Stepping motor 62...・Guide bars 110, 111...Guide strip 112...Stepper motor mounting plates 120, 121...Button heads 130, 131...Gimbal head Fig. 1 (a)
(Reno Figure 2 (a) (υ20

Claims (1)

[Scope of Claims] A driving member for driving a magnetic recording medium, a base with the driving member provided on one side, and a first magnetic recording medium driven by one of the driving members on the other side of the base. a first holding member that holds the base, a spacing member provided on one side of the base, and a second magnetic recording medium that is driven by the other driving member at a position surrounded by the spacing member; The second holding member has a first opening on the other side of the base that allows insertion of the first magnetic recording medium, and the second holding member has a first opening that allows insertion of the first magnetic recording medium on the other side of the base. A magnetic disk device characterized by having an opening member provided with a second opening that allows insertion.