JP2937023B2 - Disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive, and more particularly to a magnetic disk drive having a magnetic disk cartridge inserted and mounted.

2. Description of the Related Art In recent years, magnetic disk drives have been reduced in thickness, but higher reliability is desired.

[0003]

2. Description of the Related Art FIG.
FIG. 2 is a plan view showing the vicinity of a shutter 42 of a cartridge (hereinafter, referred to as a cartridge 4). FIG. 11A shows a plan view seen from the front surface, and FIG. 11B shows a plan view seen from the back surface. FIG. 12 is a sectional view of the cartridge 4.

[0004] On the back surface of the cartridge body 41, X ₁ ,
Groove 41c extending in the X ₂ direction is formed. Claws 42c and 42d formed on the shutter 42 are fitted in the grooves 41c. In this state, the shutter 42 is moved to X ₁ , X ₂
It moves in the direction and is opened and closed. FIG. 11 shows that the shutter
_It shows a state in which it has moved to the end in _two directions and is closed.

FIG. 13 shows a conventional thin magnetic disk drive 1.
FIG. The magnetic disk device 103 includes a holder 110 into which the cartridge 4 is inserted. The holder 110 is provided with a latch lever 105 for opening the shutter 42 of the cartridge 4 in relation to the insertion operation of the cartridge 4.

[0006] latch lever 105 is rotatably supported by a shaft 110a, a spring (not shown), and is urged in the counterclockwise direction (D ₁ direction). Lever body 106
An engagement claw 107 that engages with the front end of the shutter 42 and slides the shutter 42 protrudes from the distal end of the shutter 42.

When the cartridge 4 is inserted into the holder 110 and moves in the direction A, the engaging claw 107 comes into contact with the front end of the cartridge body 41 and enters the recess 41a. Thereafter, further the cartridge 4 is inserted in the A direction, the latch lever 105 is rotated in the clockwise direction (D ₂ direction), the engaging claw 107 enters the back side of the front end portion 42a of the shutter 42. FIG. 13 shows the state at this time.

[0008] Thereafter, with the movement of the A direction of the cartridge 4, the latch lever 105 is rotated in the clockwise direction, the shutter 42 is pushed by the engaging claws 107 are opened in the X ₁ direction.

When the cartridge 4 is inserted to a predetermined position, the shutter 42 is fully opened, the holder 110 moves to the mounting position, and the cartridge 4 is mounted.

[0010] At the time of eject operation, the latch lever 105 by the force of the spring, rotates in the counterclockwise direction, with this, the cartridge 4 is discharged in the direction B, the shutter 42 is closed direction (X ₂ direction) Go to

[0011]

In the conventional magnetic disk drive 103, as described above, when the cartridge 4 is inserted, the engaging claw 107 presses the front end 42a of the shutter 42, so that the shutter 42 is opened. .

The groove 41c of the cartridge body 41 and the claw 4
Since there is a gap between 2c and 42d, the shutter 42
Is opened while moving in the front-rear direction (A and B directions) with respect to the cartridge body 41.

However, in the conventional magnetic disk drive 103, when the cartridge 4 is inserted with a vigorous and fast speed, a large force is applied to the shutter 42 at the time when the shutter 42 starts to open, and the claws 42c and 42d of the shutter 42 There is a case where the vehicle gets out of the groove 41c and rides near the groove 41c. Thus, the conventional magnetic disk drive 10
In 3, the shutter 42 may come off the cartridge main body 41 in some cases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a disk device capable of preventing a shutter from being released when a cartridge is inserted.

[0015]

Means for Solving the Problems] inventions of claim 1, as the cartridge in which the disc-shaped recording medium is housed is inserted into the holder, the engagement portion of the rotating member provided on the holder In a disc device in which a shutter of the cartridge is opened and the cartridge is mounted at a predetermined position, the shutter is disposed close to an engaging portion provided at a tip of the rotating member, and the engaging portion contacts the shutter. when in the vicinity of the position to start contacting, only setting an engaging portion for regulating the movement of the shutter in the insertion direction of the cartridge, the engaging portion
Protrudes from the tip of the rotating member, and the end of the shutter
The engaging portion is constituted by an engaging claw abutting on the back side of the
Projecting from the tip of the rotating member, forming an included angle with the engaging claw.
And a locking claw that abuts at the front end of the shutter.
Assume that the configuration has been completed.

[0016]

[0017]

According to the first aspect of the present invention, in the vicinity of the position where the engaging portion of the rotating member starts to contact the shutter of the cartridge,
The locking portion regulates the movement of the shutter in the cartridge insertion direction. For this reason, even when the cartridge is inserted into the holder at a high speed, it is possible to prevent the shutter from coming off the cartridge body. Also,
A structure in which the end of the shutter is sandwiched between the engaging claw and the locking claw
Therefore, with a simple structure, the movement of the shutter is reliably restricted.
To prevent the shutter from coming off.
You.

[0018]

[0019]

FIG. 1 is an exploded perspective view of a magnetic disk drive 1 according to one embodiment of the disk drive according to the present invention. FIG. 2 is a plan view showing a state where the holder 5 and the slider 15 are combined.

The magnetic disk drive 1 having a thin structure has
A magnetic disk cartridge 4 (hereinafter, referred to as a magnetic disk cartridge 4)
(Referred to as a cartridge 4), the holder 5, the slider 15, and the shield cover 16 are assembled in a state of being stacked.

The holder 5 is provided so as to move up and down in accordance with mounting and ejecting operation of the cartridge 4, and an opening 5b through which the magnetic head portion 8 relatively enters is provided in the top plate 5a. The top plate 5a of the holder 5 includes
The shutter 42 of the cartridge 4 is rotated so as to open in connection with the cartridge insertion operation, and a latch lever 35 for latching the slider 15 is rotatably supported.

The front end of the latch lever 35 is engaged with the shutter 42 while slidingly contacting the front end of the cartridge 4, and an engagement claw 37 for sliding the shutter 42 in the opening direction.
a (engaging portion) protrudes. The latch lever 35
Functions as an ejecting member that presses the cartridge 4 in the ejecting direction (the direction B), and the distal end portion having the engaging claw 37a is formed in the circular hole 5c of the holder 5.
And is inserted into the holder 5.

The latch lever 35 is connected to the top plate 5 of the holder 5.
The cam 5b is supported by a shaft 5f that is supported by the shaft a, and has an arc-shaped cam portion 36b centered on the shaft 5f. Also, shaft 5f
A spring retaining hole 36c is formed at a position separated from the shaft hole 6d into which the is fitted on the cam portion 36b side.

The cam portion 36b locks the slider 15 as described later, and the cartridge 4 is inserted into the holder 5 and rotated to release the lock of the slider 15.

Coil spring 7 for urging latch lever 35
Has one end hooked to a spring hooking hole 36c of the latch lever 35, and the other end hooked to a spring hooking portion 151 of the slider 15. Therefore, the latch lever 35 is connected to the coil spring 7.
Is energized by a tensile force in the counterclockwise direction (D ₁ direction) of the slider 15 is biased in the B direction by the pulling force of the coil spring 7.

The magnetic head section 8 is arranged in the disk radial direction (A
B), and a lower magnetic head 10 provided on the top surface of the leading end of the carriage 9.
, An arm 11 rotatably supported by the base end 9 a of the carriage 9, and an upper magnetic head 12 provided on the lower surface of the distal end of the arm 11.

The carriage 9 is moved on the frame 2 in directions A and B by a stepping motor (not shown), and moves the magnetic heads 10 and 12 in a tracking direction of a magnetic disk (not shown).

The arm 11 is urged downward by a pressing force of a torsion spring (not shown) provided at the base end 9a of the carriage 9. A contact portion 11a protrudes from the side of the arm 11, and the top plate 5a of the holder 5 contacts the contact portion 11a. That is, before the cartridge 4 is inserted, the arm 11 is pressed upward by the elevation of the holder 5 to separate the upper magnetic head 12 from the lower magnetic head 10.

The slider 15 is provided between the top plate 5a of the holder 5 and the shield cover 16. Slider 1
5 is a top plate 15a facing the top plate 5a of the holder 5, and side portions 15b, 1 bent downward from both side edges of the top plate 15a.
5c (however, the side portion 15b in FIG. 1 is hidden and cannot be seen). A hole 15d for weight reduction is formed in the top plate 15a.

The side portions 15b and 15c of the slider 15 have inclined grooves 15e in which projecting pins 5d projecting from both sides of the holder 5 are fitted, and guide holes 15f for guiding the sliding operation of the slider 15 in the AB direction. Are provided. The guide hole 15 f is formed in a rectangular shape extending in the sliding direction (AB direction) of the slider 15, and is provided with an engagement protrusion 2 d provided in a concave portion 2 c outside the both side surfaces 2 a and 2 b of the frame 2. Engages.

Therefore, the slider 15 is provided with the guide hole 15f.
Are slidably engaged with the engagement protrusions 2d, thereby restricting the upward movement, and are combined such that only the slide in the AB direction is permitted.

At both ends of the top plate 15a of the slider 15, contact portions 15o to 15r which slidably contact the upper ends of both side surfaces 2a and 2b of the frame 2 project laterally. Therefore, the slider 15 has the contact portions 15o to 15r.
Are in contact with the upper ends of both side surfaces 2a and 2b of the frame 2 so that the movement in the downward direction is restricted and only the sliding in the AB direction is allowed.

An engaging portion 5e projecting from the center of both sides of the holder 5 is fitted into a groove 2e provided inside the side surfaces 2a, 2b of the frame 2. Accordingly, when the slider 15 slides in the B direction, the holder 5 is prevented from moving in the AB direction by the groove 2e extending in the vertical direction, so that the projecting pin 5d is mounted along the inclined groove 15e. Descend to position.

Further, a mounting portion 15g of the eject button 17 protrudes from the front end of the top plate 15a. The arm 15h extending from the top plate 15a of the slider 15 in the direction A is provided with a hook 15i for hooking the slider 15 bent in a U-shape and a tip of the hook 15i. And a rack 15k that meshes with a damper 18 for reducing the sliding operation of the slider 15.

The tension spring 19 for pulling the slider 15 in the B direction has one end hooked to the slider 15 and the other end hooked to a hook (not shown) projecting from the top plate 5 a of the holder 5. . The slider 15 is displaced in the direction B when the cartridge 4 is inserted by the pressing force of the spring 19 and the spring 7 described above, and the eject button 17 is pressed and slides in the direction A during the eject operation.

When the cartridge 4 is inserted into the holder 5, the contact preventing member 21 regulates the insertion height position of the cartridge 4 so that the end of the cartridge 4 does not contact the lower magnetic head 10. The contact prevention member 21 is rotatably supported by a pin 2f on the frame 2 as shown in FIG.

The turntable 25 on which the magnetic disk in the mounted cartridge 4 is mounted is rotated at a constant speed by the rotational driving force of the motor 26.

At the front ends of the frame 2 and the shield cover 16, a front bezel 27 is mounted. Front bezel 2
7, an opening 27a through which the cartridge 4 is inserted and removed is formed, and a lid 28 for opening and closing the opening 27a is rotatably provided inside the opening 27a.

Next, the configuration of the latch lever 35 will be described. FIG. 3 is a top view of the latch lever 35, and FIG.
FIG. 5 is a side view in the middle G direction, and FIG. The latch lever 35 includes a lever main body 36 and an engaging member 37 provided at a distal end portion 36a of the lever main body 36. Figures 6 and 7
Shows an enlarged top view and a side view near the engagement member 37, respectively.

The lever main body 36 is a plate-like member extending substantially in the shape of an arm in the direction of the distal end.
f. The tongue piece 36e is formed so as to extend in the H ₁ and H ₂ directions. The lever main body 36 is formed, for example, by pressing a metal.

The engaging member 37 is formed integrally with the tip 36a of the lever body 36. The engagement member 37 is a member made of, for example, a resin, and is attached to the distal end portion 36 a of the lever body 36.
It is formed by insert molding.

The protrusion 37c of the engagement member 37 is
7 surface portions 37d, are formed so as to protrude H ₁ direction.

The engaging claw 37a (engaging portion) is
Is formed so as to protrude like a beak from the convex portion 37c.

The locking claw 37b (locking portion) is
7c. The locking claw 37b forms an included angle with the engaging claw 37a when viewed from a plane (see FIG. 6), and the side surface of the locking claw 37b is formed by a surface having a large width w in the H ₁ and H ₂ directions. (See FIG. 7).

As described above, the locking claw 37b has a simple structure and can be formed integrally with the locking portion 37 having the engaging claw 37a without increasing the number of parts.

Here, the operation of the magnetic disk drive 1 having the above configuration will be described. The magnetic disk device 1 before the cartridge 4 is inserted is in a state shown in FIG. That is, the engaging portion 15i is in contact with the cam portion 36b of the latch lever 35, and the slider 15 is locked at a position slid in the direction A. Further, the arm 11 having the upper magnetic head 12 moves up to the disk insertion position together with the holder 5. Further, the latch lever 35 is rotated to the eject position as shown in FIG.

Now, when the cartridge 4 is inserted into the holder 5 through the opening 27a of the front bezel 27, the engaging claw 37a of the latch lever 35 comes into contact with the front end of the cartridge body 41, and the inside of the recess 41a of the cartridge body 41 (See FIG. 8). Thereafter, further the cartridge 4 is inserted in the A direction, the latch lever 35 is rotated in the clockwise direction (D ₂ direction), the engaging claw 37a enters the back side of the front end portion 42a of the shutter 42. FIG. 8 shows the state at this time.

[0048] Thereafter, with the movement of the A direction of the cartridge 4, the latch lever 35 is rotated in the clockwise direction, the shutter 42 is pushed by the engagement claw 37a, it is opened X ₁ direction.

As shown in FIG. 8, when the engaging claw 37a comes into contact with the front end 42a of the shutter 42 from the back, the locking claw 37b sandwiches the front end 42a of the shutter 42 together with the engaging claw 37a. The movement of the shutter 42 in the direction A with respect to the cartridge body 41 is restricted.

Therefore, even when the cartridge 4 is rapidly and rapidly inserted in the direction A and a large force is applied from the engaging claw 37a to the front end 42a of the shutter 42, the locking claw 37b is moved to the A position of the shutter 42. In order to restrict the movement in the direction, the claws 42 c and 42 d (see FIGS. 11 and 12)
1c can be prevented. Therefore, shutter 4
2 can be reliably prevented from being detached from the cartridge body 41.

As described above, the engaging claw 37a and the locking claw 37b
Thus, the simple structure sandwiching the front end portion 42a of the shutter 42 can reliably prevent the shutter 42 from coming off.

Further, when the cartridge 4 moves in the direction A and the latch lever 35 rotates clockwise to a position extending substantially in the directions X ₁ and X ₂ , the shutter 42 of the cartridge 4 is fully opened. .

FIG. 9 is an explanatory view showing the vicinity of the latch lever 35 and the cartridge 4 at this time. FIG. 9 shows a state immediately before the cam portion 36b of the latch lever 35 separates from the engaging portion 15i of the slider 15.

The engaging claw 37a of the latch lever 35 enters the rear side of the front end 42a of the shutter 42 near the left end 41a- ₁ of the recess 41a. The shutter 42 is in contact with the protrusion 37c of the engaging member 37 is a base of the engaging pawls 37a (see FIG. 6), is restricted from moving in the X ₂ direction.

[0055] Incidentally, engaging claw 37b from the state shown in FIG. 8, the latch lever 35 is brought to rotate clockwise, to leave from the front end portion 42a of the shutter 42, X ₁ direction and the shutter 42 It does not hinder movement in the A direction.

From the state shown in FIG. 9, the cartridge 4 slightly moves in the direction A, and the cam portion 3 of the latch lever 35 is moved.
When the slider 6b is separated from the engaging portion 15i of the slider 15, the locking of the slider 15 by the latch lever 35 is released. Thus, the slider 15 slides in the B direction by the spring force of the springs 7 and 19.

At this time, the slider 15 is inserted into the guide hole 15f.
Are slidably engaged in the recesses 2c provided on both sides of the frame 2 so that the upward movement is restricted by the engagement projections 2d of the recess 2c, and the contact portions 15o to 15r It slides in the direction B in a state in which it contacts the upper ends of both side surfaces 2a and 2b, and its downward movement is restricted to prevent it from falling off.

FIG. 10 is a plan view of the slider 15 and the holder 5 in a state where the engagement of the slider 15 is released and the slider 15 slides in the B direction.

The latch lever 35 is formed with a straight cam portion 36f following the end of the cam portion 36b. FIG.
As shown in the figure, the cam portion 36f is formed to have a small inclination angle (about 5 to 7 degrees) with respect to the AB direction when the engagement of the slider 15 is released.

[0060] Thus, with the slide in the B direction of the slider 15, the cam portion 36f is pressed in the X ₂ direction by the engaging portion 15i, the latch lever 35 is approximately 3 further clockwise
Rotate degrees. As a result, the engagement claw 37a is
The front end 42a of the cartridge 4
Is completely drawn into the innermost position of the holder 5.

When the cartridge 4 is rapidly and rapidly inserted in the direction A, when the front end of the cartridge 4 comes into contact with the innermost part of the holder 5, the engaging claw 37 a of the latch lever 35 moves to the shutter 42. Strong force may be applied. However, since the stopper 5h is provided at the innermost portion of the holder 5, the movement of the shutter 42 in the direction A is restricted by the stopper 5h. This makes it possible to completely prevent the shutter 42 from coming off the cartridge main body 41 when the cartridge 4 reaches the innermost position of the holder 5.

When the slider 15 slides in the direction B, the projecting pins 5d projecting from both sides of the holder 5 are engaged with the inclined grooves 15e provided on both sides 15b and 15c of the slider 15. As the slider 15 slides in the direction B, the protruding pin 5d slides on the inclined groove 15e and is pressed downward.

Thus, the holder 5 is lowered from the disk insertion / ejection position to the disk mounting position, and the magnetic disk in the cartridge 4 is placed on the turntable 22. When the holder 5 is lowered, the arm 11 is rotated downward by the pressing force of the torsion spring, and the upper magnetic head 12 is lowered.

The shutter 42 of the cartridge 4
In the process of being inserted into the holder 5, it is fully opened by the engaging claw 37a of the latch lever 35, the magnetic disk is placed on the turntable 25, and the magnetic heads 12 and 10 contact the recording surface of the magnetic disk. .

Thereafter, the turntable 25 is connected to the motor 26
, The magnetic disk rotates together with the turntable 25 and is magnetically recorded and reproduced by the magnetic heads 10 and 12.

Next, the ejecting operation of the magnetic disk device 1 having the above configuration will be described. When the magnetic disk mounted as described above is ejected together with the cartridge 4, the eject button 17 is first pressed in the direction A. As a result, the slider 15 slides in the direction A.
At this time, the guide hole 15f of the slider 15
Are slidably engaged in the recesses 2c provided on both sides of the frame 2 so that the upward movement is restricted by the engagement projections 2d of the recess 2c, and the contact portions 15o to 15r are , 2b is slid in the direction A in a state in which the downward movement is restricted by being in contact with the upper ends of the members 2b and prevented from falling off.

When the slider 15 slides in the direction A, the holder 5 is raised to the disk insertion / ejection position by an operation reverse to the above-mentioned disk cartridge insertion operation.

When the slider 15 moves in the direction A,
The coil spring 7 stretched between the latch lever 35 and the slider 15 is pulled, and the spring force of the spring 7 increases.
Then, when the spring force of the coil spring 7 becomes the strongest, the locking of the cam portion 36b by the locking portion 15i is released, so that the latch lever 35 pivots vigorously by the spring force of the coil spring 7 to move the cartridge 4 Eject can be performed reliably.

The present invention is not limited to a magnetic disk drive, but can be applied to a disk drive such as a magneto-optical disk drive on which a cartridge having a shutter is mounted.

[0070]

As described above, according to the first aspect of the present invention,
When the cartridge is inserted into the holder at a high speed because the locking portion restricts the movement of the shutter in the cartridge insertion direction near the position where the engaging portion of the rotating member starts to contact the shutter of the cartridge. However, it is possible to prevent the shutter from coming off the cartridge body. Also, the end of the shutter is sandwiched between the engaging claw and the locking claw.
The simple structure ensures that the shutter
Restricting movement to prevent the shutter from coming off
Can be.

According to the second aspect of the present invention, since the end of the shutter is sandwiched between the engaging claw and the locking claw, the movement of the shutter is reliably restricted with a simple structure, and the shutter comes off. Can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of a disk drive according to the present invention.

FIG. 2 is a plan view showing a state where a holder and a slider are combined.

FIG. 3 is a top view of a latch lever.

FIG. 4 is a side view of the latch lever as viewed in a direction G in FIG. 3;

FIG. 5 is a rear view of the latch lever.

FIG. 6 is an enlarged top view of the vicinity of an engagement member.

FIG. 7 is an enlarged side view of the vicinity of an engagement member.

FIG. 8 is a diagram illustrating a state in which an engagement claw starts opening a shutter.

FIG. 9 is a diagram illustrating the vicinity of the latch lever and the cartridge when the shutter is fully opened.

FIG. 10 is a plan view of the slider and the holder in a state where the slider has moved in the B direction.

FIG. 11 is a plan view near a shutter of the cartridge.

FIG. 12 is a sectional view of the vicinity of a shutter of the cartridge.

FIG. 13 is an explanatory diagram of an example of a conventional magnetic disk drive.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic disk drive 2 Frame 4 Magnetic disk cartridge 5 Holder 8 Magnetic head part 9 Carriage 10 Lower magnetic head 11 Arm 12 Upper magnetic head 15 Slider 16 Shield cover 17 Eject button 19 Spring 21 Contact prevention member 25 Turntable 35 Latch lever 36 lever body 36b cam portion 36c spring hook hole 36d shaft hole 36f cam portion 37 engaging portion 37a engaging claw 37b locking claw 41 cartridge body 41c groove 42 shutter 42c, 42d pawl

Claims (1)

(57) [Claims] When a cartridge accommodating a disk-shaped recording medium is inserted into a holder, a shutter of the cartridge is opened by an engaging portion of a rotating member provided on the holder, and the cartridge is moved to a predetermined position. In the disk device mounted at the position, the disk device is disposed close to an engagement portion provided at the tip of the rotating member.
Near the position where the engaging portion starts to contact the shutter.
The cartridge in the insertion direction of the cartridge when
A locking portion for restricting movement of the shutter, wherein the engaging portion protrudes from a tip of the rotating member, and
The engaging portion includes an engaging claw that abuts on the back side of the end of the shutter.
Forms an included angle with the dovetail and abuts at the front end of the shutter
Disk device comprising locking pawls
Place.